falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65664 Commits
32 Branches
1.0GB
Tree: c1df467d73
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'c1df467d73'
${ noResults }
FFmpeg/libavcodec/vc1dec.c

6379 lines
249KB
Raw Blame History 

  1. /*

  2.  * VC-1 and WMV3 decoder

  3.  * Copyright (c) 2011 Mashiat Sarker Shakkhar

  4.  * Copyright (c) 2006-2007 Konstantin Shishkov

  5.  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer

  6.  *

  7.  * This file is part of FFmpeg.

  8.  *

  9.  * FFmpeg is free software; you can redistribute it and/or

  10.  * modify it under the terms of the GNU Lesser General Public

  11.  * License as published by the Free Software Foundation; either

  12.  * version 2.1 of the License, or (at your option) any later version.

  13.  *

  14.  * FFmpeg is distributed in the hope that it will be useful,

  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  17.  * Lesser General Public License for more details.

  18.  *

  19.  * You should have received a copy of the GNU Lesser General Public

  20.  * License along with FFmpeg; if not, write to the Free Software

  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  22.  */

  23. 

  24. /**

  25.  * @file

  26.  * VC-1 and WMV3 decoder

  27.  */

  28. 

  29. #include "internal.h"

  30. #include "avcodec.h"

  31. #include "error_resilience.h"

  32. #include "mpeg_er.h"

  33. #include "mpegutils.h"

  34. #include "mpegvideo.h"

  35. #include "h263.h"

  36. #include "h264chroma.h"

  37. #include "qpeldsp.h"

  38. #include "vc1.h"

  39. #include "vc1data.h"

  40. #include "vc1acdata.h"

  41. #include "msmpeg4data.h"

  42. #include "unary.h"

  43. #include "mathops.h"

  44. #include "vdpau_internal.h"

  45. #include "libavutil/avassert.h"

  46. 

  47. #undef NDEBUG

  48. #include <assert.h>

  49. 

  50. #define MB_INTRA_VLC_BITS 9

  51. #define DC_VLC_BITS 9

  52. 

  53. 

  54. // offset tables for interlaced picture MVDATA decoding

  55. static const int offset_table1[9] = {  0,  1,  2,  4,  8, 16, 32,  64, 128 };

  56. static const int offset_table2[9] = {  0,  1,  3,  7, 15, 31, 63, 127, 255 };

  57. 

  58. /***********************************************************************/

  59. /**

  60.  * @name VC-1 Bitplane decoding

  61.  * @see 8.7, p56

  62.  * @{

  63.  */

  64. 

  65. 

  66. static void init_block_index(VC1Context *v)

  67. {

  68.     MpegEncContext *s = &v->s;

  69.     ff_init_block_index(s);

  70.     if (v->field_mode && !(v->second_field ^ v->tff)) {

  71.         s->dest[0] += s->current_picture_ptr->f->linesize[0];

  72.         s->dest[1] += s->current_picture_ptr->f->linesize[1];

  73.         s->dest[2] += s->current_picture_ptr->f->linesize[2];

  74.     }

  75. }

  76. 

  77. /** @} */ //Bitplane group

  78. 

  79. static void vc1_put_signed_blocks_clamped(VC1Context *v)

  80. {

  81.     MpegEncContext *s = &v->s;

  82.     int topleft_mb_pos, top_mb_pos;

  83.     int stride_y, fieldtx = 0;

  84.     int v_dist;

  85. 

  86.     /* The put pixels loop is always one MB row behind the decoding loop,

  87.      * because we can only put pixels when overlap filtering is done, and

  88.      * for filtering of the bottom edge of a MB, we need the next MB row

  89.      * present as well.

  90.      * Within the row, the put pixels loop is also one MB col behind the

  91.      * decoding loop. The reason for this is again, because for filtering

  92.      * of the right MB edge, we need the next MB present. */

  93.     if (!s->first_slice_line) {

  94.         if (s->mb_x) {

  95.             topleft_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x - 1;

  96.             if (v->fcm == ILACE_FRAME)

  97.                 fieldtx = v->fieldtx_plane[topleft_mb_pos];

  98.             stride_y       = s->linesize << fieldtx;

  99.             v_dist         = (16 - fieldtx) >> (fieldtx == 0);

  100.             s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][0],

  101.                                               s->dest[0] - 16 * s->linesize - 16,

  102.                                               stride_y);

  103.             s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][1],

  104.                                               s->dest[0] - 16 * s->linesize - 8,

  105.                                               stride_y);

  106.             s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][2],

  107.                                               s->dest[0] - v_dist * s->linesize - 16,

  108.                                               stride_y);

  109.             s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][3],

  110.                                               s->dest[0] - v_dist * s->linesize - 8,

  111.                                               stride_y);

  112.             s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][4],

  113.                                               s->dest[1] - 8 * s->uvlinesize - 8,

  114.                                               s->uvlinesize);

  115.             s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][5],

  116.                                               s->dest[2] - 8 * s->uvlinesize - 8,

  117.                                               s->uvlinesize);

  118.         }

  119.         if (s->mb_x == s->mb_width - 1) {

  120.             top_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x;

  121.             if (v->fcm == ILACE_FRAME)

  122.                 fieldtx = v->fieldtx_plane[top_mb_pos];

  123.             stride_y   = s->linesize << fieldtx;

  124.             v_dist     = fieldtx ? 15 : 8;

  125.             s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][0],

  126.                                               s->dest[0] - 16 * s->linesize,

  127.                                               stride_y);

  128.             s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][1],

  129.                                               s->dest[0] - 16 * s->linesize + 8,

  130.                                               stride_y);

  131.             s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][2],

  132.                                               s->dest[0] - v_dist * s->linesize,

  133.                                               stride_y);

  134.             s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][3],

  135.                                               s->dest[0] - v_dist * s->linesize + 8,

  136.                                               stride_y);

  137.             s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][4],

  138.                                               s->dest[1] - 8 * s->uvlinesize,

  139.                                               s->uvlinesize);

  140.             s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][5],

  141.                                               s->dest[2] - 8 * s->uvlinesize,

  142.                                               s->uvlinesize);

  143.         }

  144.     }

  145. 

  146. #define inc_blk_idx(idx) do { \

  147.         idx++; \

  148.         if (idx >= v->n_allocated_blks) \

  149.             idx = 0; \

  150.     } while (0)

  151. 

  152.     inc_blk_idx(v->topleft_blk_idx);

  153.     inc_blk_idx(v->top_blk_idx);

  154.     inc_blk_idx(v->left_blk_idx);

  155.     inc_blk_idx(v->cur_blk_idx);

  156. }

  157. 

  158. static void vc1_loop_filter_iblk(VC1Context *v, int pq)

  159. {

  160.     MpegEncContext *s = &v->s;

  161.     int j;

  162.     if (!s->first_slice_line) {

  163.         v->vc1dsp.vc1_v_loop_filter16(s->dest[0], s->linesize, pq);

  164.         if (s->mb_x)

  165.             v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);

  166.         v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize + 8, s->linesize, pq);

  167.         for (j = 0; j < 2; j++) {

  168.             v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1], s->uvlinesize, pq);

  169.             if (s->mb_x)

  170.                 v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);

  171.         }

  172.     }

  173.     v->vc1dsp.vc1_v_loop_filter16(s->dest[0] + 8 * s->linesize, s->linesize, pq);

  174. 

  175.     if (s->mb_y == s->end_mb_y - 1) {

  176.         if (s->mb_x) {

  177.             v->vc1dsp.vc1_h_loop_filter16(s->dest[0], s->linesize, pq);

  178.             v->vc1dsp.vc1_h_loop_filter8(s->dest[1], s->uvlinesize, pq);

  179.             v->vc1dsp.vc1_h_loop_filter8(s->dest[2], s->uvlinesize, pq);

  180.         }

  181.         v->vc1dsp.vc1_h_loop_filter16(s->dest[0] + 8, s->linesize, pq);

  182.     }

  183. }

  184. 

  185. static void vc1_loop_filter_iblk_delayed(VC1Context *v, int pq)

  186. {

  187.     MpegEncContext *s = &v->s;

  188.     int j;

  189. 

  190.     /* The loopfilter runs 1 row and 1 column behind the overlap filter, which

  191.      * means it runs two rows/cols behind the decoding loop. */

  192.     if (!s->first_slice_line) {

  193.         if (s->mb_x) {

  194.             if (s->mb_y >= s->start_mb_y + 2) {

  195.                 v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 16 * s->linesize - 16, s->linesize, pq);

  196. 

  197.                 if (s->mb_x >= 2)

  198.                     v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 16, s->linesize, pq);

  199.                 v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 8, s->linesize, pq);

  200.                 for (j = 0; j < 2; j++) {

  201.                     v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize - 8, s->uvlinesize, pq);

  202.                     if (s->mb_x >= 2) {

  203.                         v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 16 * s->uvlinesize - 8, s->uvlinesize, pq);

  204.                     }

  205.                 }

  206.             }

  207.             v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 8 * s->linesize - 16, s->linesize, pq);

  208.         }

  209. 

  210.         if (s->mb_x == s->mb_width - 1) {

  211.             if (s->mb_y >= s->start_mb_y + 2) {

  212.                 v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);

  213. 

  214.                 if (s->mb_x)

  215.                     v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize, s->linesize, pq);

  216.                 v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize + 8, s->linesize, pq);

  217.                 for (j = 0; j < 2; j++) {

  218.                     v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);

  219.                     if (s->mb_x >= 2) {

  220.                         v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 16 * s->uvlinesize, s->uvlinesize, pq);

  221.                     }

  222.                 }

  223.             }

  224.             v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 8 * s->linesize, s->linesize, pq);

  225.         }

  226. 

  227.         if (s->mb_y == s->end_mb_y) {

  228.             if (s->mb_x) {

  229.                 if (s->mb_x >= 2)

  230.                     v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize - 16, s->linesize, pq);

  231.                 v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize - 8, s->linesize, pq);

  232.                 if (s->mb_x >= 2) {

  233.                     for (j = 0; j < 2; j++) {

  234.                         v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize - 8, s->uvlinesize, pq);

  235.                     }

  236.                 }

  237.             }

  238. 

  239.             if (s->mb_x == s->mb_width - 1) {

  240.                 if (s->mb_x)

  241.                     v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);

  242.                 v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize + 8, s->linesize, pq);

  243.                 if (s->mb_x) {

  244.                     for (j = 0; j < 2; j++) {

  245.                         v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);

  246.                     }

  247.                 }

  248.             }

  249.         }

  250.     }

  251. }

  252. 

  253. static void vc1_smooth_overlap_filter_iblk(VC1Context *v)

  254. {

  255.     MpegEncContext *s = &v->s;

  256.     int mb_pos;

  257. 

  258.     if (v->condover == CONDOVER_NONE)

  259.         return;

  260. 

  261.     mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  262. 

  263.     /* Within a MB, the horizontal overlap always runs before the vertical.

  264.      * To accomplish that, we run the H on left and internal borders of the

  265.      * currently decoded MB. Then, we wait for the next overlap iteration

  266.      * to do H overlap on the right edge of this MB, before moving over and

  267.      * running the V overlap. Therefore, the V overlap makes us trail by one

  268.      * MB col and the H overlap filter makes us trail by one MB row. This

  269.      * is reflected in the time at which we run the put_pixels loop. */

  270.     if (v->condover == CONDOVER_ALL || v->pq >= 9 || v->over_flags_plane[mb_pos]) {

  271.         if (s->mb_x && (v->condover == CONDOVER_ALL || v->pq >= 9 ||

  272.                         v->over_flags_plane[mb_pos - 1])) {

  273.             v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][1],

  274.                                       v->block[v->cur_blk_idx][0]);

  275.             v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][3],

  276.                                       v->block[v->cur_blk_idx][2]);

  277.             if (!(s->flags & CODEC_FLAG_GRAY)) {

  278.                 v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][4],

  279.                                           v->block[v->cur_blk_idx][4]);

  280.                 v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][5],

  281.                                           v->block[v->cur_blk_idx][5]);

  282.             }

  283.         }

  284.         v->vc1dsp.vc1_h_s_overlap(v->block[v->cur_blk_idx][0],

  285.                                   v->block[v->cur_blk_idx][1]);

  286.         v->vc1dsp.vc1_h_s_overlap(v->block[v->cur_blk_idx][2],

  287.                                   v->block[v->cur_blk_idx][3]);

  288. 

  289.         if (s->mb_x == s->mb_width - 1) {

  290.             if (!s->first_slice_line && (v->condover == CONDOVER_ALL || v->pq >= 9 ||

  291.                                          v->over_flags_plane[mb_pos - s->mb_stride])) {

  292.                 v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][2],

  293.                                           v->block[v->cur_blk_idx][0]);

  294.                 v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][3],

  295.                                           v->block[v->cur_blk_idx][1]);

  296.                 if (!(s->flags & CODEC_FLAG_GRAY)) {

  297.                     v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][4],

  298.                                               v->block[v->cur_blk_idx][4]);

  299.                     v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][5],

  300.                                               v->block[v->cur_blk_idx][5]);

  301.                 }

  302.             }

  303.             v->vc1dsp.vc1_v_s_overlap(v->block[v->cur_blk_idx][0],

  304.                                       v->block[v->cur_blk_idx][2]);

  305.             v->vc1dsp.vc1_v_s_overlap(v->block[v->cur_blk_idx][1],

  306.                                       v->block[v->cur_blk_idx][3]);

  307.         }

  308.     }

  309.     if (s->mb_x && (v->condover == CONDOVER_ALL || v->over_flags_plane[mb_pos - 1])) {

  310.         if (!s->first_slice_line && (v->condover == CONDOVER_ALL || v->pq >= 9 ||

  311.                                      v->over_flags_plane[mb_pos - s->mb_stride - 1])) {

  312.             v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][2],

  313.                                       v->block[v->left_blk_idx][0]);

  314.             v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][3],

  315.                                       v->block[v->left_blk_idx][1]);

  316.             if (!(s->flags & CODEC_FLAG_GRAY)) {

  317.                 v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][4],

  318.                                           v->block[v->left_blk_idx][4]);

  319.                 v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][5],

  320.                                           v->block[v->left_blk_idx][5]);

  321.             }

  322.         }

  323.         v->vc1dsp.vc1_v_s_overlap(v->block[v->left_blk_idx][0],

  324.                                   v->block[v->left_blk_idx][2]);

  325.         v->vc1dsp.vc1_v_s_overlap(v->block[v->left_blk_idx][1],

  326.                                   v->block[v->left_blk_idx][3]);

  327.     }

  328. }

  329. 

  330. /** Do motion compensation over 1 macroblock

  331.  * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c

  332.  */

  333. static void vc1_mc_1mv(VC1Context *v, int dir)

  334. {

  335.     MpegEncContext *s = &v->s;

  336.     H264ChromaContext *h264chroma = &v->h264chroma;

  337.     uint8_t *srcY, *srcU, *srcV;

  338.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  339.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  340.     int i;

  341.     uint8_t (*luty)[256], (*lutuv)[256];

  342.     int use_ic;

  343. 

  344.     if ((!v->field_mode ||

  345.          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&

  346.         !v->s.last_picture.f->data[0])

  347.         return;

  348. 

  349.     mx = s->mv[dir][0][0];

  350.     my = s->mv[dir][0][1];

  351. 

  352.     // store motion vectors for further use in B frames

  353.     if (s->pict_type == AV_PICTURE_TYPE_P) {

  354.         for (i = 0; i < 4; i++) {

  355.             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = mx;

  356.             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = my;

  357.         }

  358.     }

  359. 

  360.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  361.     uvmy = (my + ((my & 3) == 3)) >> 1;

  362.     v->luma_mv[s->mb_x][0] = uvmx;

  363.     v->luma_mv[s->mb_x][1] = uvmy;

  364. 

  365.     if (v->field_mode &&

  366.         v->cur_field_type != v->ref_field_type[dir]) {

  367.         my   = my   - 2 + 4 * v->cur_field_type;

  368.         uvmy = uvmy - 2 + 4 * v->cur_field_type;

  369.     }

  370. 

  371.     // fastuvmc shall be ignored for interlaced frame picture

  372.     if (v->fastuvmc && (v->fcm != ILACE_FRAME)) {

  373.         uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));

  374.         uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));

  375.     }

  376.     if (!dir) {

  377.         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {

  378.             srcY = s->current_picture.f->data[0];

  379.             srcU = s->current_picture.f->data[1];

  380.             srcV = s->current_picture.f->data[2];

  381.             luty  = v->curr_luty;

  382.             lutuv = v->curr_lutuv;

  383.             use_ic = *v->curr_use_ic;

  384.         } else {

  385.             srcY = s->last_picture.f->data[0];

  386.             srcU = s->last_picture.f->data[1];

  387.             srcV = s->last_picture.f->data[2];

  388.             luty  = v->last_luty;

  389.             lutuv = v->last_lutuv;

  390.             use_ic = v->last_use_ic;

  391.         }

  392.     } else {

  393.         srcY = s->next_picture.f->data[0];

  394.         srcU = s->next_picture.f->data[1];

  395.         srcV = s->next_picture.f->data[2];

  396.         luty  = v->next_luty;

  397.         lutuv = v->next_lutuv;

  398.         use_ic = v->next_use_ic;

  399.     }

  400. 

  401.     if (!srcY || !srcU) {

  402.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");

  403.         return;

  404.     }

  405. 

  406.     src_x   = s->mb_x * 16 + (mx   >> 2);

  407.     src_y   = s->mb_y * 16 + (my   >> 2);

  408.     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);

  409.     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);

  410. 

  411.     if (v->profile != PROFILE_ADVANCED) {

  412.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  413.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  414.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  415.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  416.     } else {

  417.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  418.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  419.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  420.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  421.     }

  422. 

  423.     srcY += src_y   * s->linesize   + src_x;

  424.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  425.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  426. 

  427.     if (v->field_mode && v->ref_field_type[dir]) {

  428.         srcY += s->current_picture_ptr->f->linesize[0];

  429.         srcU += s->current_picture_ptr->f->linesize[1];

  430.         srcV += s->current_picture_ptr->f->linesize[2];

  431.     }

  432. 

  433.     /* for grayscale we should not try to read from unknown area */

  434.     if (s->flags & CODEC_FLAG_GRAY) {

  435.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  436.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  437.     }

  438. 

  439.     if (v->rangeredfrm || use_ic

  440.         || s->h_edge_pos < 22 || v_edge_pos < 22

  441.         || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel * 3

  442.         || (unsigned)(src_y - 1)        > v_edge_pos    - (my&3) - 16 - 3) {

  443.         uint8_t *ubuf = s->edge_emu_buffer + 19 * s->linesize;

  444.         uint8_t *vbuf = ubuf + 9 * s->uvlinesize;

  445. 

  446.         srcY -= s->mspel * (1 + s->linesize);

  447.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,

  448.                                  s->linesize, s->linesize,

  449.                                  17 + s->mspel * 2, 17 + s->mspel * 2,

  450.                                  src_x - s->mspel, src_y - s->mspel,

  451.                                  s->h_edge_pos, v_edge_pos);

  452.         srcY = s->edge_emu_buffer;

  453.         s->vdsp.emulated_edge_mc(ubuf, srcU,

  454.                                  s->uvlinesize, s->uvlinesize,

  455.                                  8 + 1, 8 + 1,

  456.                                  uvsrc_x, uvsrc_y,

  457.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  458.         s->vdsp.emulated_edge_mc(vbuf, srcV,

  459.                                  s->uvlinesize, s->uvlinesize,

  460.                                  8 + 1, 8 + 1,

  461.                                  uvsrc_x, uvsrc_y,

  462.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  463.         srcU = ubuf;

  464.         srcV = vbuf;

  465.         /* if we deal with range reduction we need to scale source blocks */

  466.         if (v->rangeredfrm) {

  467.             int i, j;

  468.             uint8_t *src, *src2;

  469. 

  470.             src = srcY;

  471.             for (j = 0; j < 17 + s->mspel * 2; j++) {

  472.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  473.                     src[i] = ((src[i] - 128) >> 1) + 128;

  474.                 src += s->linesize;

  475.             }

  476.             src  = srcU;

  477.             src2 = srcV;

  478.             for (j = 0; j < 9; j++) {

  479.                 for (i = 0; i < 9; i++) {

  480.                     src[i]  = ((src[i]  - 128) >> 1) + 128;

  481.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  482.                 }

  483.                 src  += s->uvlinesize;

  484.                 src2 += s->uvlinesize;

  485.             }

  486.         }

  487.         /* if we deal with intensity compensation we need to scale source blocks */

  488.         if (use_ic) {

  489.             int i, j;

  490.             uint8_t *src, *src2;

  491. 

  492.             src = srcY;

  493.             for (j = 0; j < 17 + s->mspel * 2; j++) {

  494.                 int f = v->field_mode ? v->ref_field_type[dir] : ((j + src_y - s->mspel) & 1) ;

  495.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  496.                     src[i] = luty[f][src[i]];

  497.                 src += s->linesize;

  498.             }

  499.             src  = srcU;

  500.             src2 = srcV;

  501.             for (j = 0; j < 9; j++) {

  502.                 int f = v->field_mode ? v->ref_field_type[dir] : ((j + uvsrc_y) & 1);

  503.                 for (i = 0; i < 9; i++) {

  504.                     src[i]  = lutuv[f][src[i]];

  505.                     src2[i] = lutuv[f][src2[i]];

  506.                 }

  507.                 src  += s->uvlinesize;

  508.                 src2 += s->uvlinesize;

  509.             }

  510.         }

  511.         srcY += s->mspel * (1 + s->linesize);

  512.     }

  513. 

  514.     if (s->mspel) {

  515.         dxy = ((my & 3) << 2) | (mx & 3);

  516.         v->vc1dsp.put_vc1_mspel_pixels_tab[0][dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  517.     } else { // hpel mc - always used for luma

  518.         dxy = (my & 2) | ((mx & 2) >> 1);

  519.         if (!v->rnd)

  520.             s->hdsp.put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  521.         else

  522.             s->hdsp.put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  523.     }

  524. 

  525.     if (s->flags & CODEC_FLAG_GRAY) return;

  526.     /* Chroma MC always uses qpel bilinear */

  527.     uvmx = (uvmx & 3) << 1;

  528.     uvmy = (uvmy & 3) << 1;

  529.     if (!v->rnd) {

  530.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  531.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  532.     } else {

  533.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  534.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  535.     }

  536. }

  537. 

  538. static inline int median4(int a, int b, int c, int d)

  539. {

  540.     if (a < b) {

  541.         if (c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;

  542.         else       return (FFMIN(b, c) + FFMAX(a, d)) / 2;

  543.     } else {

  544.         if (c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;

  545.         else       return (FFMIN(a, c) + FFMAX(b, d)) / 2;

  546.     }

  547. }

  548. 

  549. /** Do motion compensation for 4-MV macroblock - luminance block

  550.  */

  551. static void vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg)

  552. {

  553.     MpegEncContext *s = &v->s;

  554.     uint8_t *srcY;

  555.     int dxy, mx, my, src_x, src_y;

  556.     int off;

  557.     int fieldmv = (v->fcm == ILACE_FRAME) ? v->blk_mv_type[s->block_index[n]] : 0;

  558.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  559.     uint8_t (*luty)[256];

  560.     int use_ic;

  561. 

  562.     if ((!v->field_mode ||

  563.          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&

  564.         !v->s.last_picture.f->data[0])

  565.         return;

  566. 

  567.     mx = s->mv[dir][n][0];

  568.     my = s->mv[dir][n][1];

  569. 

  570.     if (!dir) {

  571.         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {

  572.             srcY = s->current_picture.f->data[0];

  573.             luty = v->curr_luty;

  574.             use_ic = *v->curr_use_ic;

  575.         } else {

  576.             srcY = s->last_picture.f->data[0];

  577.             luty = v->last_luty;

  578.             use_ic = v->last_use_ic;

  579.         }

  580.     } else {

  581.         srcY = s->next_picture.f->data[0];

  582.         luty = v->next_luty;

  583.         use_ic = v->next_use_ic;

  584.     }

  585. 

  586.     if (!srcY) {

  587.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");

  588.         return;

  589.     }

  590. 

  591.     if (v->field_mode) {

  592.         if (v->cur_field_type != v->ref_field_type[dir])

  593.             my = my - 2 + 4 * v->cur_field_type;

  594.     }

  595. 

  596.     if (s->pict_type == AV_PICTURE_TYPE_P && n == 3 && v->field_mode) {

  597.         int same_count = 0, opp_count = 0, k;

  598.         int chosen_mv[2][4][2], f;

  599.         int tx, ty;

  600.         for (k = 0; k < 4; k++) {

  601.             f = v->mv_f[0][s->block_index[k] + v->blocks_off];

  602.             chosen_mv[f][f ? opp_count : same_count][0] = s->mv[0][k][0];

  603.             chosen_mv[f][f ? opp_count : same_count][1] = s->mv[0][k][1];

  604.             opp_count  += f;

  605.             same_count += 1 - f;

  606.         }

  607.         f = opp_count > same_count;

  608.         switch (f ? opp_count : same_count) {

  609.         case 4:

  610.             tx = median4(chosen_mv[f][0][0], chosen_mv[f][1][0],

  611.                          chosen_mv[f][2][0], chosen_mv[f][3][0]);

  612.             ty = median4(chosen_mv[f][0][1], chosen_mv[f][1][1],

  613.                          chosen_mv[f][2][1], chosen_mv[f][3][1]);

  614.             break;

  615.         case 3:

  616.             tx = mid_pred(chosen_mv[f][0][0], chosen_mv[f][1][0], chosen_mv[f][2][0]);

  617.             ty = mid_pred(chosen_mv[f][0][1], chosen_mv[f][1][1], chosen_mv[f][2][1]);

  618.             break;

  619.         case 2:

  620.             tx = (chosen_mv[f][0][0] + chosen_mv[f][1][0]) / 2;

  621.             ty = (chosen_mv[f][0][1] + chosen_mv[f][1][1]) / 2;

  622.             break;

  623.         default:

  624.             av_assert0(0);

  625.         }

  626.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;

  627.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;

  628.         for (k = 0; k < 4; k++)

  629.             v->mv_f[1][s->block_index[k] + v->blocks_off] = f;

  630.     }

  631. 

  632.     if (v->fcm == ILACE_FRAME) {  // not sure if needed for other types of picture

  633.         int qx, qy;

  634.         int width  = s->avctx->coded_width;

  635.         int height = s->avctx->coded_height >> 1;

  636.         if (s->pict_type == AV_PICTURE_TYPE_P) {

  637.             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][0] = mx;

  638.             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][1] = my;

  639.         }

  640.         qx = (s->mb_x * 16) + (mx >> 2);

  641.         qy = (s->mb_y *  8) + (my >> 3);

  642. 

  643.         if (qx < -17)

  644.             mx -= 4 * (qx + 17);

  645.         else if (qx > width)

  646.             mx -= 4 * (qx - width);

  647.         if (qy < -18)

  648.             my -= 8 * (qy + 18);

  649.         else if (qy > height + 1)

  650.             my -= 8 * (qy - height - 1);

  651.     }

  652. 

  653.     if ((v->fcm == ILACE_FRAME) && fieldmv)

  654.         off = ((n > 1) ? s->linesize : 0) + (n & 1) * 8;

  655.     else

  656.         off = s->linesize * 4 * (n & 2) + (n & 1) * 8;

  657. 

  658.     src_x = s->mb_x * 16 + (n & 1) * 8 + (mx >> 2);

  659.     if (!fieldmv)

  660.         src_y = s->mb_y * 16 + (n & 2) * 4 + (my >> 2);

  661.     else

  662.         src_y = s->mb_y * 16 + ((n > 1) ? 1 : 0) + (my >> 2);

  663. 

  664.     if (v->profile != PROFILE_ADVANCED) {

  665.         src_x = av_clip(src_x, -16, s->mb_width  * 16);

  666.         src_y = av_clip(src_y, -16, s->mb_height * 16);

  667.     } else {

  668.         src_x = av_clip(src_x, -17, s->avctx->coded_width);

  669.         if (v->fcm == ILACE_FRAME) {

  670.             if (src_y & 1)

  671.                 src_y = av_clip(src_y, -17, s->avctx->coded_height + 1);

  672.             else

  673.                 src_y = av_clip(src_y, -18, s->avctx->coded_height);

  674.         } else {

  675.             src_y = av_clip(src_y, -18, s->avctx->coded_height + 1);

  676.         }

  677.     }

  678. 

  679.     srcY += src_y * s->linesize + src_x;

  680.     if (v->field_mode && v->ref_field_type[dir])

  681.         srcY += s->current_picture_ptr->f->linesize[0];

  682. 

  683.     if (fieldmv && !(src_y & 1))

  684.         v_edge_pos--;

  685.     if (fieldmv && (src_y & 1) && src_y < 4)

  686.         src_y--;

  687.     if (v->rangeredfrm || use_ic

  688.         || s->h_edge_pos < 13 || v_edge_pos < 23

  689.         || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx & 3) - 8 - s->mspel * 2

  690.         || (unsigned)(src_y - (s->mspel << fieldmv)) > v_edge_pos - (my & 3) - ((8 + s->mspel * 2) << fieldmv)) {

  691.         srcY -= s->mspel * (1 + (s->linesize << fieldmv));

  692.         /* check emulate edge stride and offset */

  693.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,

  694.                                  s->linesize, s->linesize,

  695.                                  9 + s->mspel * 2, (9 + s->mspel * 2) << fieldmv,

  696.                                  src_x - s->mspel, src_y - (s->mspel << fieldmv),

  697.                                  s->h_edge_pos, v_edge_pos);

  698.         srcY = s->edge_emu_buffer;

  699.         /* if we deal with range reduction we need to scale source blocks */

  700.         if (v->rangeredfrm) {

  701.             int i, j;

  702.             uint8_t *src;

  703. 

  704.             src = srcY;

  705.             for (j = 0; j < 9 + s->mspel * 2; j++) {

  706.                 for (i = 0; i < 9 + s->mspel * 2; i++)

  707.                     src[i] = ((src[i] - 128) >> 1) + 128;

  708.                 src += s->linesize << fieldmv;

  709.             }

  710.         }

  711.         /* if we deal with intensity compensation we need to scale source blocks */

  712.         if (use_ic) {

  713.             int i, j;

  714.             uint8_t *src;

  715. 

  716.             src = srcY;

  717.             for (j = 0; j < 9 + s->mspel * 2; j++) {

  718.                 int f = v->field_mode ? v->ref_field_type[dir] : (((j<<fieldmv)+src_y - (s->mspel << fieldmv)) & 1);

  719.                 for (i = 0; i < 9 + s->mspel * 2; i++)

  720.                     src[i] = luty[f][src[i]];

  721.                 src += s->linesize << fieldmv;

  722.             }

  723.         }

  724.         srcY += s->mspel * (1 + (s->linesize << fieldmv));

  725.     }

  726. 

  727.     if (s->mspel) {

  728.         dxy = ((my & 3) << 2) | (mx & 3);

  729.         if (avg)

  730.             v->vc1dsp.avg_vc1_mspel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);

  731.         else

  732.             v->vc1dsp.put_vc1_mspel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);

  733.     } else { // hpel mc - always used for luma

  734.         dxy = (my & 2) | ((mx & 2) >> 1);

  735.         if (!v->rnd)

  736.             s->hdsp.put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);

  737.         else

  738.             s->hdsp.put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);

  739.     }

  740. }

  741. 

  742. static av_always_inline int get_chroma_mv(int *mvx, int *mvy, int *a, int flag, int *tx, int *ty)

  743. {

  744.     int idx, i;

  745.     static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};

  746. 

  747.     idx =  ((a[3] != flag) << 3)

  748.          | ((a[2] != flag) << 2)

  749.          | ((a[1] != flag) << 1)

  750.          |  (a[0] != flag);

  751.     if (!idx) {

  752.         *tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);

  753.         *ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);

  754.         return 4;

  755.     } else if (count[idx] == 1) {

  756.         switch (idx) {

  757.         case 0x1:

  758.             *tx = mid_pred(mvx[1], mvx[2], mvx[3]);

  759.             *ty = mid_pred(mvy[1], mvy[2], mvy[3]);

  760.             return 3;

  761.         case 0x2:

  762.             *tx = mid_pred(mvx[0], mvx[2], mvx[3]);

  763.             *ty = mid_pred(mvy[0], mvy[2], mvy[3]);

  764.             return 3;

  765.         case 0x4:

  766.             *tx = mid_pred(mvx[0], mvx[1], mvx[3]);

  767.             *ty = mid_pred(mvy[0], mvy[1], mvy[3]);

  768.             return 3;

  769.         case 0x8:

  770.             *tx = mid_pred(mvx[0], mvx[1], mvx[2]);

  771.             *ty = mid_pred(mvy[0], mvy[1], mvy[2]);

  772.             return 3;

  773.         }

  774.     } else if (count[idx] == 2) {

  775.         int t1 = 0, t2 = 0;

  776.         for (i = 0; i < 3; i++)

  777.             if (!a[i]) {

  778.                 t1 = i;

  779.                 break;

  780.             }

  781.         for (i = t1 + 1; i < 4; i++)

  782.             if (!a[i]) {

  783.                 t2 = i;

  784.                 break;

  785.             }

  786.         *tx = (mvx[t1] + mvx[t2]) / 2;

  787.         *ty = (mvy[t1] + mvy[t2]) / 2;

  788.         return 2;

  789.     } else {

  790.         return 0;

  791.     }

  792.     return -1;

  793. }

  794. 

  795. /** Do motion compensation for 4-MV macroblock - both chroma blocks

  796.  */

  797. static void vc1_mc_4mv_chroma(VC1Context *v, int dir)

  798. {

  799.     MpegEncContext *s = &v->s;

  800.     H264ChromaContext *h264chroma = &v->h264chroma;

  801.     uint8_t *srcU, *srcV;

  802.     int uvmx, uvmy, uvsrc_x, uvsrc_y;

  803.     int k, tx = 0, ty = 0;

  804.     int mvx[4], mvy[4], intra[4], mv_f[4];

  805.     int valid_count;

  806.     int chroma_ref_type = v->cur_field_type;

  807.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  808.     uint8_t (*lutuv)[256];

  809.     int use_ic;

  810. 

  811.     if (!v->field_mode && !v->s.last_picture.f->data[0])

  812.         return;

  813.     if (s->flags & CODEC_FLAG_GRAY)

  814.         return;

  815. 

  816.     for (k = 0; k < 4; k++) {

  817.         mvx[k] = s->mv[dir][k][0];

  818.         mvy[k] = s->mv[dir][k][1];

  819.         intra[k] = v->mb_type[0][s->block_index[k]];

  820.         if (v->field_mode)

  821.             mv_f[k] = v->mv_f[dir][s->block_index[k] + v->blocks_off];

  822.     }

  823. 

  824.     /* calculate chroma MV vector from four luma MVs */

  825.     if (!v->field_mode || (v->field_mode && !v->numref)) {

  826.         valid_count = get_chroma_mv(mvx, mvy, intra, 0, &tx, &ty);

  827.         chroma_ref_type = v->reffield;

  828.         if (!valid_count) {

  829.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  830.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  831.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  832.             return; //no need to do MC for intra blocks

  833.         }

  834.     } else {

  835.         int dominant = 0;

  836.         if (mv_f[0] + mv_f[1] + mv_f[2] + mv_f[3] > 2)

  837.             dominant = 1;

  838.         valid_count = get_chroma_mv(mvx, mvy, mv_f, dominant, &tx, &ty);

  839.         if (dominant)

  840.             chroma_ref_type = !v->cur_field_type;

  841.     }

  842.     if (v->field_mode && chroma_ref_type == 1 && v->cur_field_type == 1 && !v->s.last_picture.f->data[0])

  843.         return;

  844.     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;

  845.     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;

  846.     uvmx = (tx + ((tx & 3) == 3)) >> 1;

  847.     uvmy = (ty + ((ty & 3) == 3)) >> 1;

  848. 

  849.     v->luma_mv[s->mb_x][0] = uvmx;

  850.     v->luma_mv[s->mb_x][1] = uvmy;

  851. 

  852.     if (v->fastuvmc) {

  853.         uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));

  854.         uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));

  855.     }

  856.     // Field conversion bias

  857.     if (v->cur_field_type != chroma_ref_type)

  858.         uvmy += 2 - 4 * chroma_ref_type;

  859. 

  860.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  861.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  862. 

  863.     if (v->profile != PROFILE_ADVANCED) {

  864.         uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width  * 8);

  865.         uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);

  866.     } else {

  867.         uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);

  868.         uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);

  869.     }

  870. 

  871.     if (!dir) {

  872.         if (v->field_mode && (v->cur_field_type != chroma_ref_type) && v->second_field) {

  873.             srcU = s->current_picture.f->data[1];

  874.             srcV = s->current_picture.f->data[2];

  875.             lutuv = v->curr_lutuv;

  876.             use_ic = *v->curr_use_ic;

  877.         } else {

  878.             srcU = s->last_picture.f->data[1];

  879.             srcV = s->last_picture.f->data[2];

  880.             lutuv = v->last_lutuv;

  881.             use_ic = v->last_use_ic;

  882.         }

  883.     } else {

  884.         srcU = s->next_picture.f->data[1];

  885.         srcV = s->next_picture.f->data[2];

  886.         lutuv = v->next_lutuv;

  887.         use_ic = v->next_use_ic;

  888.     }

  889. 

  890.     if (!srcU) {

  891.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");

  892.         return;

  893.     }

  894. 

  895.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  896.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  897. 

  898.     if (v->field_mode) {

  899.         if (chroma_ref_type) {

  900.             srcU += s->current_picture_ptr->f->linesize[1];

  901.             srcV += s->current_picture_ptr->f->linesize[2];

  902.         }

  903.     }

  904. 

  905.     if (v->rangeredfrm || use_ic

  906.         || s->h_edge_pos < 18 || v_edge_pos < 18

  907.         || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9

  908.         || (unsigned)uvsrc_y > (v_edge_pos    >> 1) - 9) {

  909.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcU,

  910.                                  s->uvlinesize, s->uvlinesize,

  911.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

  912.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  913.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV,

  914.                                  s->uvlinesize, s->uvlinesize,

  915.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

  916.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  917.         srcU = s->edge_emu_buffer;

  918.         srcV = s->edge_emu_buffer + 16;

  919. 

  920.         /* if we deal with range reduction we need to scale source blocks */

  921.         if (v->rangeredfrm) {

  922.             int i, j;

  923.             uint8_t *src, *src2;

  924. 

  925.             src  = srcU;

  926.             src2 = srcV;

  927.             for (j = 0; j < 9; j++) {

  928.                 for (i = 0; i < 9; i++) {

  929.                     src[i]  = ((src[i]  - 128) >> 1) + 128;

  930.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  931.                 }

  932.                 src  += s->uvlinesize;

  933.                 src2 += s->uvlinesize;

  934.             }

  935.         }

  936.         /* if we deal with intensity compensation we need to scale source blocks */

  937.         if (use_ic) {

  938.             int i, j;

  939.             uint8_t *src, *src2;

  940. 

  941.             src  = srcU;

  942.             src2 = srcV;

  943.             for (j = 0; j < 9; j++) {

  944.                 int f = v->field_mode ? chroma_ref_type : ((j + uvsrc_y) & 1);

  945.                 for (i = 0; i < 9; i++) {

  946.                     src[i]  = lutuv[f][src[i]];

  947.                     src2[i] = lutuv[f][src2[i]];

  948.                 }

  949.                 src  += s->uvlinesize;

  950.                 src2 += s->uvlinesize;

  951.             }

  952.         }

  953.     }

  954. 

  955.     /* Chroma MC always uses qpel bilinear */

  956.     uvmx = (uvmx & 3) << 1;

  957.     uvmy = (uvmy & 3) << 1;

  958.     if (!v->rnd) {

  959.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  960.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  961.     } else {

  962.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  963.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  964.     }

  965. }

  966. 

  967. /** Do motion compensation for 4-MV interlaced frame chroma macroblock (both U and V)

  968.  */

  969. static void vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg)

  970. {

  971.     MpegEncContext *s = &v->s;

  972.     H264ChromaContext *h264chroma = &v->h264chroma;

  973.     uint8_t *srcU, *srcV;

  974.     int uvsrc_x, uvsrc_y;

  975.     int uvmx_field[4], uvmy_field[4];

  976.     int i, off, tx, ty;

  977.     int fieldmv = v->blk_mv_type[s->block_index[0]];

  978.     static const int s_rndtblfield[16] = { 0, 0, 1, 2, 4, 4, 5, 6, 2, 2, 3, 8, 6, 6, 7, 12 };

  979.     int v_dist = fieldmv ? 1 : 4; // vertical offset for lower sub-blocks

  980.     int v_edge_pos = s->v_edge_pos >> 1;

  981.     int use_ic;

  982.     uint8_t (*lutuv)[256];

  983. 

  984.     if (s->flags & CODEC_FLAG_GRAY)

  985.         return;

  986. 

  987.     for (i = 0; i < 4; i++) {

  988.         int d = i < 2 ? dir: dir2;

  989.         tx = s->mv[d][i][0];

  990.         uvmx_field[i] = (tx + ((tx & 3) == 3)) >> 1;

  991.         ty = s->mv[d][i][1];

  992.         if (fieldmv)

  993.             uvmy_field[i] = (ty >> 4) * 8 + s_rndtblfield[ty & 0xF];

  994.         else

  995.             uvmy_field[i] = (ty + ((ty & 3) == 3)) >> 1;

  996.     }

  997. 

  998.     for (i = 0; i < 4; i++) {

  999.         off = (i & 1) * 4 + ((i & 2) ? v_dist * s->uvlinesize : 0);

  1000.         uvsrc_x = s->mb_x * 8 +  (i & 1) * 4           + (uvmx_field[i] >> 2);

  1001.         uvsrc_y = s->mb_y * 8 + ((i & 2) ? v_dist : 0) + (uvmy_field[i] >> 2);

  1002.         // FIXME: implement proper pull-back (see vc1cropmv.c, vc1CROPMV_ChromaPullBack())

  1003.         uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);

  1004.         uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);

  1005.         if (i < 2 ? dir : dir2) {

  1006.             srcU = s->next_picture.f->data[1];

  1007.             srcV = s->next_picture.f->data[2];

  1008.             lutuv  = v->next_lutuv;

  1009.             use_ic = v->next_use_ic;

  1010.         } else {

  1011.             srcU = s->last_picture.f->data[1];

  1012.             srcV = s->last_picture.f->data[2];

  1013.             lutuv  = v->last_lutuv;

  1014.             use_ic = v->last_use_ic;

  1015.         }

  1016.         if (!srcU)

  1017.             return;

  1018.         srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1019.         srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1020.         uvmx_field[i] = (uvmx_field[i] & 3) << 1;

  1021.         uvmy_field[i] = (uvmy_field[i] & 3) << 1;

  1022. 

  1023.         if (fieldmv && !(uvsrc_y & 1))

  1024.             v_edge_pos = (s->v_edge_pos >> 1) - 1;

  1025. 

  1026.         if (fieldmv && (uvsrc_y & 1) && uvsrc_y < 2)

  1027.             uvsrc_y--;

  1028.         if (use_ic

  1029.             || s->h_edge_pos < 10 || v_edge_pos < (5 << fieldmv)

  1030.             || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 5

  1031.             || (unsigned)uvsrc_y > v_edge_pos - (5 << fieldmv)) {

  1032.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcU,

  1033.                                      s->uvlinesize, s->uvlinesize,

  1034.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,

  1035.                                      s->h_edge_pos >> 1, v_edge_pos);

  1036.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV,

  1037.                                      s->uvlinesize, s->uvlinesize,

  1038.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,

  1039.                                      s->h_edge_pos >> 1, v_edge_pos);

  1040.             srcU = s->edge_emu_buffer;

  1041.             srcV = s->edge_emu_buffer + 16;

  1042. 

  1043.             /* if we deal with intensity compensation we need to scale source blocks */

  1044.             if (use_ic) {

  1045.                 int i, j;

  1046.                 uint8_t *src, *src2;

  1047. 

  1048.                 src  = srcU;

  1049.                 src2 = srcV;

  1050.                 for (j = 0; j < 5; j++) {

  1051.                     int f = (uvsrc_y + (j << fieldmv)) & 1;

  1052.                     for (i = 0; i < 5; i++) {

  1053.                         src[i]  = lutuv[f][src[i]];

  1054.                         src2[i] = lutuv[f][src2[i]];

  1055.                     }

  1056.                     src  += s->uvlinesize << fieldmv;

  1057.                     src2 += s->uvlinesize << fieldmv;

  1058.                 }

  1059.             }

  1060.         }

  1061.         if (avg) {

  1062.             if (!v->rnd) {

  1063.                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1064.                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1065.             } else {

  1066.                 v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1067.                 v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1068.             }

  1069.         } else {

  1070.             if (!v->rnd) {

  1071.                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1072.                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1073.             } else {

  1074.                 v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1075.                 v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1076.             }

  1077.         }

  1078.     }

  1079. }

  1080. 

  1081. /***********************************************************************/

  1082. /**

  1083.  * @name VC-1 Block-level functions

  1084.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1085.  * @{

  1086.  */

  1087. 

  1088. /**

  1089.  * @def GET_MQUANT

  1090.  * @brief Get macroblock-level quantizer scale

  1091.  */

  1092. #define GET_MQUANT()                                           \

  1093.     if (v->dquantfrm) {                                        \

  1094.         int edges = 0;                                         \

  1095.         if (v->dqprofile == DQPROFILE_ALL_MBS) {               \

  1096.             if (v->dqbilevel) {                                \

  1097.                 mquant = (get_bits1(gb)) ? v->altpq : v->pq;   \

  1098.             } else {                                           \

  1099.                 mqdiff = get_bits(gb, 3);                      \

  1100.                 if (mqdiff != 7)                               \

  1101.                     mquant = v->pq + mqdiff;                   \

  1102.                 else                                           \

  1103.                     mquant = get_bits(gb, 5);                  \

  1104.             }                                                  \

  1105.         }                                                      \

  1106.         if (v->dqprofile == DQPROFILE_SINGLE_EDGE)             \

  1107.             edges = 1 << v->dqsbedge;                          \

  1108.         else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES)       \

  1109.             edges = (3 << v->dqsbedge) % 15;                   \

  1110.         else if (v->dqprofile == DQPROFILE_FOUR_EDGES)         \

  1111.             edges = 15;                                        \

  1112.         if ((edges&1) && !s->mb_x)                             \

  1113.             mquant = v->altpq;                                 \

  1114.         if ((edges&2) && s->first_slice_line)                  \

  1115.             mquant = v->altpq;                                 \

  1116.         if ((edges&4) && s->mb_x == (s->mb_width - 1))         \

  1117.             mquant = v->altpq;                                 \

  1118.         if ((edges&8) && s->mb_y == (s->mb_height - 1))        \

  1119.             mquant = v->altpq;                                 \

  1120.         if (!mquant || mquant > 31) {                          \

  1121.             av_log(v->s.avctx, AV_LOG_ERROR,                   \

  1122.                    "Overriding invalid mquant %d\n", mquant);  \

  1123.             mquant = 1;                                        \

  1124.         }                                                      \

  1125.     }

  1126. 

  1127. /**

  1128.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1129.  * @brief Get MV differentials

  1130.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1131.  * @param _dmv_x Horizontal differential for decoded MV

  1132.  * @param _dmv_y Vertical differential for decoded MV

  1133.  */

  1134. #define GET_MVDATA(_dmv_x, _dmv_y)                                      \

  1135.     index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \

  1136.                          VC1_MV_DIFF_VLC_BITS, 2);                      \

  1137.     if (index > 36) {                                                   \

  1138.         mb_has_coeffs = 1;                                              \

  1139.         index -= 37;                                                    \

  1140.     } else                                                              \

  1141.         mb_has_coeffs = 0;                                              \

  1142.     s->mb_intra = 0;                                                    \

  1143.     if (!index) {                                                       \

  1144.         _dmv_x = _dmv_y = 0;                                            \

  1145.     } else if (index == 35) {                                           \

  1146.         _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1147.         _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1148.     } else if (index == 36) {                                           \

  1149.         _dmv_x = 0;                                                     \

  1150.         _dmv_y = 0;                                                     \

  1151.         s->mb_intra = 1;                                                \

  1152.     } else {                                                            \

  1153.         index1 = index % 6;                                             \

  1154.         if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1155.         else                                   val = 0;                 \

  1156.         if (size_table[index1] - val > 0)                               \

  1157.             val = get_bits(gb, size_table[index1] - val);               \

  1158.         else                                   val = 0;                 \

  1159.         sign = 0 - (val&1);                                             \

  1160.         _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1161.                                                                         \

  1162.         index1 = index / 6;                                             \

  1163.         if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1164.         else                                   val = 0;                 \

  1165.         if (size_table[index1] - val > 0)                               \

  1166.             val = get_bits(gb, size_table[index1] - val);               \

  1167.         else                                   val = 0;                 \

  1168.         sign = 0 - (val & 1);                                           \

  1169.         _dmv_y = (sign ^ ((val >> 1) + offset_table[index1])) - sign;   \

  1170.     }

  1171. 

  1172. static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,

  1173.                                                    int *dmv_y, int *pred_flag)

  1174. {

  1175.     int index, index1;

  1176.     int extend_x = 0, extend_y = 0;

  1177.     GetBitContext *gb = &v->s.gb;

  1178.     int bits, esc;

  1179.     int val, sign;

  1180.     const int* offs_tab;

  1181. 

  1182.     if (v->numref) {

  1183.         bits = VC1_2REF_MVDATA_VLC_BITS;

  1184.         esc  = 125;

  1185.     } else {

  1186.         bits = VC1_1REF_MVDATA_VLC_BITS;

  1187.         esc  = 71;

  1188.     }

  1189.     switch (v->dmvrange) {

  1190.     case 1:

  1191.         extend_x = 1;

  1192.         break;

  1193.     case 2:

  1194.         extend_y = 1;

  1195.         break;

  1196.     case 3:

  1197.         extend_x = extend_y = 1;

  1198.         break;

  1199.     }

  1200.     index = get_vlc2(gb, v->imv_vlc->table, bits, 3);

  1201.     if (index == esc) {

  1202.         *dmv_x = get_bits(gb, v->k_x);

  1203.         *dmv_y = get_bits(gb, v->k_y);

  1204.         if (v->numref) {

  1205.             if (pred_flag) {

  1206.                 *pred_flag = *dmv_y & 1;

  1207.                 *dmv_y     = (*dmv_y + *pred_flag) >> 1;

  1208.             } else {

  1209.                 *dmv_y     = (*dmv_y + (*dmv_y & 1)) >> 1;

  1210.             }

  1211.         }

  1212.     }

  1213.     else {

  1214.         av_assert0(index < esc);

  1215.         if (extend_x)

  1216.             offs_tab = offset_table2;

  1217.         else

  1218.             offs_tab = offset_table1;

  1219.         index1 = (index + 1) % 9;

  1220.         if (index1 != 0) {

  1221.             val    = get_bits(gb, index1 + extend_x);

  1222.             sign   = 0 -(val & 1);

  1223.             *dmv_x = (sign ^ ((val >> 1) + offs_tab[index1])) - sign;

  1224.         } else

  1225.             *dmv_x = 0;

  1226.         if (extend_y)

  1227.             offs_tab = offset_table2;

  1228.         else

  1229.             offs_tab = offset_table1;

  1230.         index1 = (index + 1) / 9;

  1231.         if (index1 > v->numref) {

  1232.             val    = get_bits(gb, (index1 + (extend_y << v->numref)) >> v->numref);

  1233.             sign   = 0 - (val & 1);

  1234.             *dmv_y = (sign ^ ((val >> 1) + offs_tab[index1 >> v->numref])) - sign;

  1235.         } else

  1236.             *dmv_y = 0;

  1237.         if (v->numref && pred_flag)

  1238.             *pred_flag = index1 & 1;

  1239.     }

  1240. }

  1241. 

  1242. static av_always_inline int scaleforsame_x(VC1Context *v, int n /* MV */, int dir)

  1243. {

  1244.     int scaledvalue, refdist;

  1245.     int scalesame1, scalesame2;

  1246.     int scalezone1_x, zone1offset_x;

  1247.     int table_index = dir ^ v->second_field;

  1248. 

  1249.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1250.         refdist = v->refdist;

  1251.     else

  1252.         refdist = dir ? v->brfd : v->frfd;

  1253.     if (refdist > 3)

  1254.         refdist = 3;

  1255.     scalesame1    = ff_vc1_field_mvpred_scales[table_index][1][refdist];

  1256.     scalesame2    = ff_vc1_field_mvpred_scales[table_index][2][refdist];

  1257.     scalezone1_x  = ff_vc1_field_mvpred_scales[table_index][3][refdist];

  1258.     zone1offset_x = ff_vc1_field_mvpred_scales[table_index][5][refdist];

  1259. 

  1260.     if (FFABS(n) > 255)

  1261.         scaledvalue = n;

  1262.     else {

  1263.         if (FFABS(n) < scalezone1_x)

  1264.             scaledvalue = (n * scalesame1) >> 8;

  1265.         else {

  1266.             if (n < 0)

  1267.                 scaledvalue = ((n * scalesame2) >> 8) - zone1offset_x;

  1268.             else

  1269.                 scaledvalue = ((n * scalesame2) >> 8) + zone1offset_x;

  1270.         }

  1271.     }

  1272.     return av_clip(scaledvalue, -v->range_x, v->range_x - 1);

  1273. }

  1274. 

  1275. static av_always_inline int scaleforsame_y(VC1Context *v, int i, int n /* MV */, int dir)

  1276. {

  1277.     int scaledvalue, refdist;

  1278.     int scalesame1, scalesame2;

  1279.     int scalezone1_y, zone1offset_y;

  1280.     int table_index = dir ^ v->second_field;

  1281. 

  1282.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1283.         refdist = v->refdist;

  1284.     else

  1285.         refdist = dir ? v->brfd : v->frfd;

  1286.     if (refdist > 3)

  1287.         refdist = 3;

  1288.     scalesame1    = ff_vc1_field_mvpred_scales[table_index][1][refdist];

  1289.     scalesame2    = ff_vc1_field_mvpred_scales[table_index][2][refdist];

  1290.     scalezone1_y  = ff_vc1_field_mvpred_scales[table_index][4][refdist];

  1291.     zone1offset_y = ff_vc1_field_mvpred_scales[table_index][6][refdist];

  1292. 

  1293.     if (FFABS(n) > 63)

  1294.         scaledvalue = n;

  1295.     else {

  1296.         if (FFABS(n) < scalezone1_y)

  1297.             scaledvalue = (n * scalesame1) >> 8;

  1298.         else {

  1299.             if (n < 0)

  1300.                 scaledvalue = ((n * scalesame2) >> 8) - zone1offset_y;

  1301.             else

  1302.                 scaledvalue = ((n * scalesame2) >> 8) + zone1offset_y;

  1303.         }

  1304.     }

  1305. 

  1306.     if (v->cur_field_type && !v->ref_field_type[dir])

  1307.         return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);

  1308.     else

  1309.         return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);

  1310. }

  1311. 

  1312. static av_always_inline int scaleforopp_x(VC1Context *v, int n /* MV */)

  1313. {

  1314.     int scalezone1_x, zone1offset_x;

  1315.     int scaleopp1, scaleopp2, brfd;

  1316.     int scaledvalue;

  1317. 

  1318.     brfd = FFMIN(v->brfd, 3);

  1319.     scalezone1_x  = ff_vc1_b_field_mvpred_scales[3][brfd];

  1320.     zone1offset_x = ff_vc1_b_field_mvpred_scales[5][brfd];

  1321.     scaleopp1     = ff_vc1_b_field_mvpred_scales[1][brfd];

  1322.     scaleopp2     = ff_vc1_b_field_mvpred_scales[2][brfd];

  1323. 

  1324.     if (FFABS(n) > 255)

  1325.         scaledvalue = n;

  1326.     else {

  1327.         if (FFABS(n) < scalezone1_x)

  1328.             scaledvalue = (n * scaleopp1) >> 8;

  1329.         else {

  1330.             if (n < 0)

  1331.                 scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_x;

  1332.             else

  1333.                 scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_x;

  1334.         }

  1335.     }

  1336.     return av_clip(scaledvalue, -v->range_x, v->range_x - 1);

  1337. }

  1338. 

  1339. static av_always_inline int scaleforopp_y(VC1Context *v, int n /* MV */, int dir)

  1340. {

  1341.     int scalezone1_y, zone1offset_y;

  1342.     int scaleopp1, scaleopp2, brfd;

  1343.     int scaledvalue;

  1344. 

  1345.     brfd = FFMIN(v->brfd, 3);

  1346.     scalezone1_y  = ff_vc1_b_field_mvpred_scales[4][brfd];

  1347.     zone1offset_y = ff_vc1_b_field_mvpred_scales[6][brfd];

  1348.     scaleopp1     = ff_vc1_b_field_mvpred_scales[1][brfd];

  1349.     scaleopp2     = ff_vc1_b_field_mvpred_scales[2][brfd];

  1350. 

  1351.     if (FFABS(n) > 63)

  1352.         scaledvalue = n;

  1353.     else {

  1354.         if (FFABS(n) < scalezone1_y)

  1355.             scaledvalue = (n * scaleopp1) >> 8;

  1356.         else {

  1357.             if (n < 0)

  1358.                 scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_y;

  1359.             else

  1360.                 scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_y;

  1361.         }

  1362.     }

  1363.     if (v->cur_field_type && !v->ref_field_type[dir]) {

  1364.         return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);

  1365.     } else {

  1366.         return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);

  1367.     }

  1368. }

  1369. 

  1370. static av_always_inline int scaleforsame(VC1Context *v, int i, int n /* MV */,

  1371.                                          int dim, int dir)

  1372. {

  1373.     int brfd, scalesame;

  1374.     int hpel = 1 - v->s.quarter_sample;

  1375. 

  1376.     n >>= hpel;

  1377.     if (v->s.pict_type != AV_PICTURE_TYPE_B || v->second_field || !dir) {

  1378.         if (dim)

  1379.             n = scaleforsame_y(v, i, n, dir) << hpel;

  1380.         else

  1381.             n = scaleforsame_x(v, n, dir) << hpel;

  1382.         return n;

  1383.     }

  1384.     brfd      = FFMIN(v->brfd, 3);

  1385.     scalesame = ff_vc1_b_field_mvpred_scales[0][brfd];

  1386. 

  1387.     n = (n * scalesame >> 8) << hpel;

  1388.     return n;

  1389. }

  1390. 

  1391. static av_always_inline int scaleforopp(VC1Context *v, int n /* MV */,

  1392.                                         int dim, int dir)

  1393. {

  1394.     int refdist, scaleopp;

  1395.     int hpel = 1 - v->s.quarter_sample;

  1396. 

  1397.     n >>= hpel;

  1398.     if (v->s.pict_type == AV_PICTURE_TYPE_B && !v->second_field && dir == 1) {

  1399.         if (dim)

  1400.             n = scaleforopp_y(v, n, dir) << hpel;

  1401.         else

  1402.             n = scaleforopp_x(v, n) << hpel;

  1403.         return n;

  1404.     }

  1405.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1406.         refdist = FFMIN(v->refdist, 3);

  1407.     else

  1408.         refdist = dir ? v->brfd : v->frfd;

  1409.     scaleopp = ff_vc1_field_mvpred_scales[dir ^ v->second_field][0][refdist];

  1410. 

  1411.     n = (n * scaleopp >> 8) << hpel;

  1412.     return n;

  1413. }

  1414. 

  1415. /** Predict and set motion vector

  1416.  */

  1417. static inline void vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y,

  1418.                                int mv1, int r_x, int r_y, uint8_t* is_intra,

  1419.                                int pred_flag, int dir)

  1420. {

  1421.     MpegEncContext *s = &v->s;

  1422.     int xy, wrap, off = 0;

  1423.     int16_t *A, *B, *C;

  1424.     int px, py;

  1425.     int sum;

  1426.     int mixedmv_pic, num_samefield = 0, num_oppfield = 0;

  1427.     int opposite, a_f, b_f, c_f;

  1428.     int16_t field_predA[2];

  1429.     int16_t field_predB[2];

  1430.     int16_t field_predC[2];

  1431.     int a_valid, b_valid, c_valid;

  1432.     int hybridmv_thresh, y_bias = 0;

  1433. 

  1434.     if (v->mv_mode == MV_PMODE_MIXED_MV ||

  1435.         ((v->mv_mode == MV_PMODE_INTENSITY_COMP) && (v->mv_mode2 == MV_PMODE_MIXED_MV)))

  1436.         mixedmv_pic = 1;

  1437.     else

  1438.         mixedmv_pic = 0;

  1439.     /* scale MV difference to be quad-pel */

  1440.     dmv_x <<= 1 - s->quarter_sample;

  1441.     dmv_y <<= 1 - s->quarter_sample;

  1442. 

  1443.     wrap = s->b8_stride;

  1444.     xy   = s->block_index[n];

  1445. 

  1446.     if (s->mb_intra) {

  1447.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy + v->blocks_off][0] = 0;

  1448.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy + v->blocks_off][1] = 0;

  1449.         s->current_picture.motion_val[1][xy + v->blocks_off][0] = 0;

  1450.         s->current_picture.motion_val[1][xy + v->blocks_off][1] = 0;

  1451.         if (mv1) { /* duplicate motion data for 1-MV block */

  1452.             s->current_picture.motion_val[0][xy + 1 + v->blocks_off][0]        = 0;

  1453.             s->current_picture.motion_val[0][xy + 1 + v->blocks_off][1]        = 0;

  1454.             s->current_picture.motion_val[0][xy + wrap + v->blocks_off][0]     = 0;

  1455.             s->current_picture.motion_val[0][xy + wrap + v->blocks_off][1]     = 0;

  1456.             s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][0] = 0;

  1457.             s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][1] = 0;

  1458.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  1459.             s->current_picture.motion_val[1][xy + 1 + v->blocks_off][0]        = 0;

  1460.             s->current_picture.motion_val[1][xy + 1 + v->blocks_off][1]        = 0;

  1461.             s->current_picture.motion_val[1][xy + wrap][0]                     = 0;

  1462.             s->current_picture.motion_val[1][xy + wrap + v->blocks_off][1]     = 0;

  1463.             s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][0] = 0;

  1464.             s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][1] = 0;

  1465.         }

  1466.         return;

  1467.     }

  1468. 

  1469.     C = s->current_picture.motion_val[dir][xy -    1 + v->blocks_off];

  1470.     A = s->current_picture.motion_val[dir][xy - wrap + v->blocks_off];

  1471.     if (mv1) {

  1472.         if (v->field_mode && mixedmv_pic)

  1473.             off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1474.         else

  1475.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1476.     } else {

  1477.         //in 4-MV mode different blocks have different B predictor position

  1478.         switch (n) {

  1479.         case 0:

  1480.             off = (s->mb_x > 0) ? -1 : 1;

  1481.             break;

  1482.         case 1:

  1483.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1484.             break;

  1485.         case 2:

  1486.             off = 1;

  1487.             break;

  1488.         case 3:

  1489.             off = -1;

  1490.         }

  1491.     }

  1492.     B = s->current_picture.motion_val[dir][xy - wrap + off + v->blocks_off];

  1493. 

  1494.     a_valid = !s->first_slice_line || (n == 2 || n == 3);

  1495.     b_valid = a_valid && (s->mb_width > 1);

  1496.     c_valid = s->mb_x || (n == 1 || n == 3);

  1497.     if (v->field_mode) {

  1498.         a_valid = a_valid && !is_intra[xy - wrap];

  1499.         b_valid = b_valid && !is_intra[xy - wrap + off];

  1500.         c_valid = c_valid && !is_intra[xy - 1];

  1501.     }

  1502. 

  1503.     if (a_valid) {

  1504.         a_f = v->mv_f[dir][xy - wrap + v->blocks_off];

  1505.         num_oppfield  += a_f;

  1506.         num_samefield += 1 - a_f;

  1507.         field_predA[0] = A[0];

  1508.         field_predA[1] = A[1];

  1509.     } else {

  1510.         field_predA[0] = field_predA[1] = 0;

  1511.         a_f = 0;

  1512.     }

  1513.     if (b_valid) {

  1514.         b_f = v->mv_f[dir][xy - wrap + off + v->blocks_off];

  1515.         num_oppfield  += b_f;

  1516.         num_samefield += 1 - b_f;

  1517.         field_predB[0] = B[0];

  1518.         field_predB[1] = B[1];

  1519.     } else {

  1520.         field_predB[0] = field_predB[1] = 0;

  1521.         b_f = 0;

  1522.     }

  1523.     if (c_valid) {

  1524.         c_f = v->mv_f[dir][xy - 1 + v->blocks_off];

  1525.         num_oppfield  += c_f;

  1526.         num_samefield += 1 - c_f;

  1527.         field_predC[0] = C[0];

  1528.         field_predC[1] = C[1];

  1529.     } else {

  1530.         field_predC[0] = field_predC[1] = 0;

  1531.         c_f = 0;

  1532.     }

  1533. 

  1534.     if (v->field_mode) {

  1535.         if (!v->numref)

  1536.             // REFFIELD determines if the last field or the second-last field is

  1537.             // to be used as reference

  1538.             opposite = 1 - v->reffield;

  1539.         else {

  1540.             if (num_samefield <= num_oppfield)

  1541.                 opposite = 1 - pred_flag;

  1542.             else

  1543.                 opposite = pred_flag;

  1544.         }

  1545.     } else

  1546.         opposite = 0;

  1547.     if (opposite) {

  1548.         if (a_valid && !a_f) {

  1549.             field_predA[0] = scaleforopp(v, field_predA[0], 0, dir);

  1550.             field_predA[1] = scaleforopp(v, field_predA[1], 1, dir);

  1551.         }

  1552.         if (b_valid && !b_f) {

  1553.             field_predB[0] = scaleforopp(v, field_predB[0], 0, dir);

  1554.             field_predB[1] = scaleforopp(v, field_predB[1], 1, dir);

  1555.         }

  1556.         if (c_valid && !c_f) {

  1557.             field_predC[0] = scaleforopp(v, field_predC[0], 0, dir);

  1558.             field_predC[1] = scaleforopp(v, field_predC[1], 1, dir);

  1559.         }

  1560.         v->mv_f[dir][xy + v->blocks_off] = 1;

  1561.         v->ref_field_type[dir] = !v->cur_field_type;

  1562.     } else {

  1563.         if (a_valid && a_f) {

  1564.             field_predA[0] = scaleforsame(v, n, field_predA[0], 0, dir);

  1565.             field_predA[1] = scaleforsame(v, n, field_predA[1], 1, dir);

  1566.         }

  1567.         if (b_valid && b_f) {

  1568.             field_predB[0] = scaleforsame(v, n, field_predB[0], 0, dir);

  1569.             field_predB[1] = scaleforsame(v, n, field_predB[1], 1, dir);

  1570.         }

  1571.         if (c_valid && c_f) {

  1572.             field_predC[0] = scaleforsame(v, n, field_predC[0], 0, dir);

  1573.             field_predC[1] = scaleforsame(v, n, field_predC[1], 1, dir);

  1574.         }

  1575.         v->mv_f[dir][xy + v->blocks_off] = 0;

  1576.         v->ref_field_type[dir] = v->cur_field_type;

  1577.     }

  1578. 

  1579.     if (a_valid) {

  1580.         px = field_predA[0];

  1581.         py = field_predA[1];

  1582.     } else if (c_valid) {

  1583.         px = field_predC[0];

  1584.         py = field_predC[1];

  1585.     } else if (b_valid) {

  1586.         px = field_predB[0];

  1587.         py = field_predB[1];

  1588.     } else {

  1589.         px = 0;

  1590.         py = 0;

  1591.     }

  1592. 

  1593.     if (num_samefield + num_oppfield > 1) {

  1594.         px = mid_pred(field_predA[0], field_predB[0], field_predC[0]);

  1595.         py = mid_pred(field_predA[1], field_predB[1], field_predC[1]);

  1596.     }

  1597. 

  1598.     /* Pullback MV as specified in 8.3.5.3.4 */

  1599.     if (!v->field_mode) {

  1600.         int qx, qy, X, Y;

  1601.         qx = (s->mb_x << 6) + ((n == 1 || n == 3) ? 32 : 0);

  1602.         qy = (s->mb_y << 6) + ((n == 2 || n == 3) ? 32 : 0);

  1603.         X  = (s->mb_width  << 6) - 4;

  1604.         Y  = (s->mb_height << 6) - 4;

  1605.         if (mv1) {

  1606.             if (qx + px < -60) px = -60 - qx;

  1607.             if (qy + py < -60) py = -60 - qy;

  1608.         } else {

  1609.             if (qx + px < -28) px = -28 - qx;

  1610.             if (qy + py < -28) py = -28 - qy;

  1611.         }

  1612.         if (qx + px > X) px = X - qx;

  1613.         if (qy + py > Y) py = Y - qy;

  1614.     }

  1615. 

  1616.     if (!v->field_mode || s->pict_type != AV_PICTURE_TYPE_B) {

  1617.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 (also 10.3.5.4.3.5) */

  1618.         hybridmv_thresh = 32;

  1619.         if (a_valid && c_valid) {

  1620.             if (is_intra[xy - wrap])

  1621.                 sum = FFABS(px) + FFABS(py);

  1622.             else

  1623.                 sum = FFABS(px - field_predA[0]) + FFABS(py - field_predA[1]);

  1624.             if (sum > hybridmv_thresh) {

  1625.                 if (get_bits1(&s->gb)) {     // read HYBRIDPRED bit

  1626.                     px = field_predA[0];

  1627.                     py = field_predA[1];

  1628.                 } else {

  1629.                     px = field_predC[0];

  1630.                     py = field_predC[1];

  1631.                 }

  1632.             } else {

  1633.                 if (is_intra[xy - 1])

  1634.                     sum = FFABS(px) + FFABS(py);

  1635.                 else

  1636.                     sum = FFABS(px - field_predC[0]) + FFABS(py - field_predC[1]);

  1637.                 if (sum > hybridmv_thresh) {

  1638.                     if (get_bits1(&s->gb)) {

  1639.                         px = field_predA[0];

  1640.                         py = field_predA[1];

  1641.                     } else {

  1642.                         px = field_predC[0];

  1643.                         py = field_predC[1];

  1644.                     }

  1645.                 }

  1646.             }

  1647.         }

  1648.     }

  1649. 

  1650.     if (v->field_mode && v->numref)

  1651.         r_y >>= 1;

  1652.     if (v->field_mode && v->cur_field_type && v->ref_field_type[dir] == 0)

  1653.         y_bias = 1;

  1654.     /* store MV using signed modulus of MV range defined in 4.11 */

  1655.     s->mv[dir][n][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1656.     s->mv[dir][n][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1] = ((py + dmv_y + r_y - y_bias) & ((r_y << 1) - 1)) - r_y + y_bias;

  1657.     if (mv1) { /* duplicate motion data for 1-MV block */

  1658.         s->current_picture.motion_val[dir][xy +    1 +     v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];

  1659.         s->current_picture.motion_val[dir][xy +    1 +     v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];

  1660.         s->current_picture.motion_val[dir][xy + wrap +     v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];

  1661.         s->current_picture.motion_val[dir][xy + wrap +     v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];

  1662.         s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];

  1663.         s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];

  1664.         v->mv_f[dir][xy +    1 + v->blocks_off] = v->mv_f[dir][xy +            v->blocks_off];

  1665.         v->mv_f[dir][xy + wrap + v->blocks_off] = v->mv_f[dir][xy + wrap + 1 + v->blocks_off] = v->mv_f[dir][xy + v->blocks_off];

  1666.     }

  1667. }

  1668. 

  1669. /** Predict and set motion vector for interlaced frame picture MBs

  1670.  */

  1671. static inline void vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,

  1672.                                      int mvn, int r_x, int r_y, uint8_t* is_intra, int dir)

  1673. {

  1674.     MpegEncContext *s = &v->s;

  1675.     int xy, wrap, off = 0;

  1676.     int A[2], B[2], C[2];

  1677.     int px = 0, py = 0;

  1678.     int a_valid = 0, b_valid = 0, c_valid = 0;

  1679.     int field_a, field_b, field_c; // 0: same, 1: opposit

  1680.     int total_valid, num_samefield, num_oppfield;

  1681.     int pos_c, pos_b, n_adj;

  1682. 

  1683.     wrap = s->b8_stride;

  1684.     xy = s->block_index[n];

  1685. 

  1686.     if (s->mb_intra) {

  1687.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1688.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

  1689.         s->current_picture.motion_val[1][xy][0] = 0;

  1690.         s->current_picture.motion_val[1][xy][1] = 0;

  1691.         if (mvn == 1) { /* duplicate motion data for 1-MV block */

  1692.             s->current_picture.motion_val[0][xy + 1][0]        = 0;

  1693.             s->current_picture.motion_val[0][xy + 1][1]        = 0;

  1694.             s->current_picture.motion_val[0][xy + wrap][0]     = 0;

  1695.             s->current_picture.motion_val[0][xy + wrap][1]     = 0;

  1696.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  1697.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  1698.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  1699.             s->current_picture.motion_val[1][xy + 1][0]        = 0;

  1700.             s->current_picture.motion_val[1][xy + 1][1]        = 0;

  1701.             s->current_picture.motion_val[1][xy + wrap][0]     = 0;

  1702.             s->current_picture.motion_val[1][xy + wrap][1]     = 0;

  1703.             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;

  1704.             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;

  1705.         }

  1706.         return;

  1707.     }

  1708. 

  1709.     off = ((n == 0) || (n == 1)) ? 1 : -1;

  1710.     /* predict A */

  1711.     if (s->mb_x || (n == 1) || (n == 3)) {

  1712.         if ((v->blk_mv_type[xy]) // current block (MB) has a field MV

  1713.             || (!v->blk_mv_type[xy] && !v->blk_mv_type[xy - 1])) { // or both have frame MV

  1714.             A[0] = s->current_picture.motion_val[dir][xy - 1][0];

  1715.             A[1] = s->current_picture.motion_val[dir][xy - 1][1];

  1716.             a_valid = 1;

  1717.         } else { // current block has frame mv and cand. has field MV (so average)

  1718.             A[0] = (s->current_picture.motion_val[dir][xy - 1][0]

  1719.                     + s->current_picture.motion_val[dir][xy - 1 + off * wrap][0] + 1) >> 1;

  1720.             A[1] = (s->current_picture.motion_val[dir][xy - 1][1]

  1721.                     + s->current_picture.motion_val[dir][xy - 1 + off * wrap][1] + 1) >> 1;

  1722.             a_valid = 1;

  1723.         }

  1724.         if (!(n & 1) && v->is_intra[s->mb_x - 1]) {

  1725.             a_valid = 0;

  1726.             A[0] = A[1] = 0;

  1727.         }

  1728.     } else

  1729.         A[0] = A[1] = 0;

  1730.     /* Predict B and C */

  1731.     B[0] = B[1] = C[0] = C[1] = 0;

  1732.     if (n == 0 || n == 1 || v->blk_mv_type[xy]) {

  1733.         if (!s->first_slice_line) {

  1734.             if (!v->is_intra[s->mb_x - s->mb_stride]) {

  1735.                 b_valid = 1;

  1736.                 n_adj   = n | 2;

  1737.                 pos_b   = s->block_index[n_adj] - 2 * wrap;

  1738.                 if (v->blk_mv_type[pos_b] && v->blk_mv_type[xy]) {

  1739.                     n_adj = (n & 2) | (n & 1);

  1740.                 }

  1741.                 B[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap][0];

  1742.                 B[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap][1];

  1743.                 if (v->blk_mv_type[pos_b] && !v->blk_mv_type[xy]) {

  1744.                     B[0] = (B[0] + s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap][0] + 1) >> 1;

  1745.                     B[1] = (B[1] + s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap][1] + 1) >> 1;

  1746.                 }

  1747.             }

  1748.             if (s->mb_width > 1) {

  1749.                 if (!v->is_intra[s->mb_x - s->mb_stride + 1]) {

  1750.                     c_valid = 1;

  1751.                     n_adj   = 2;

  1752.                     pos_c   = s->block_index[2] - 2 * wrap + 2;

  1753.                     if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {

  1754.                         n_adj = n & 2;

  1755.                     }

  1756.                     C[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap + 2][0];

  1757.                     C[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap + 2][1];

  1758.                     if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {

  1759.                         C[0] = (1 + C[0] + (s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap + 2][0])) >> 1;

  1760.                         C[1] = (1 + C[1] + (s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap + 2][1])) >> 1;

  1761.                     }

  1762.                     if (s->mb_x == s->mb_width - 1) {

  1763.                         if (!v->is_intra[s->mb_x - s->mb_stride - 1]) {

  1764.                             c_valid = 1;

  1765.                             n_adj   = 3;

  1766.                             pos_c   = s->block_index[3] - 2 * wrap - 2;

  1767.                             if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {

  1768.                                 n_adj = n | 1;

  1769.                             }

  1770.                             C[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap - 2][0];

  1771.                             C[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap - 2][1];

  1772.                             if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {

  1773.                                 C[0] = (1 + C[0] + s->current_picture.motion_val[dir][s->block_index[1] - 2 * wrap - 2][0]) >> 1;

  1774.                                 C[1] = (1 + C[1] + s->current_picture.motion_val[dir][s->block_index[1] - 2 * wrap - 2][1]) >> 1;

  1775.                             }

  1776.                         } else

  1777.                             c_valid = 0;

  1778.                     }

  1779.                 }

  1780.             }

  1781.         }

  1782.     } else {

  1783.         pos_b   = s->block_index[1];

  1784.         b_valid = 1;

  1785.         B[0]    = s->current_picture.motion_val[dir][pos_b][0];

  1786.         B[1]    = s->current_picture.motion_val[dir][pos_b][1];

  1787.         pos_c   = s->block_index[0];

  1788.         c_valid = 1;

  1789.         C[0]    = s->current_picture.motion_val[dir][pos_c][0];

  1790.         C[1]    = s->current_picture.motion_val[dir][pos_c][1];

  1791.     }

  1792. 

  1793.     total_valid = a_valid + b_valid + c_valid;

  1794.     // check if predictor A is out of bounds

  1795.     if (!s->mb_x && !(n == 1 || n == 3)) {

  1796.         A[0] = A[1] = 0;

  1797.     }

  1798.     // check if predictor B is out of bounds

  1799.     if ((s->first_slice_line && v->blk_mv_type[xy]) || (s->first_slice_line && !(n & 2))) {

  1800.         B[0] = B[1] = C[0] = C[1] = 0;

  1801.     }

  1802.     if (!v->blk_mv_type[xy]) {

  1803.         if (s->mb_width == 1) {

  1804.             px = B[0];

  1805.             py = B[1];

  1806.         } else {

  1807.             if (total_valid >= 2) {

  1808.                 px = mid_pred(A[0], B[0], C[0]);

  1809.                 py = mid_pred(A[1], B[1], C[1]);

  1810.             } else if (total_valid) {

  1811.                 if      (a_valid) { px = A[0]; py = A[1]; }

  1812.                 else if (b_valid) { px = B[0]; py = B[1]; }

  1813.                 else              { px = C[0]; py = C[1]; }

  1814.             }

  1815.         }

  1816.     } else {

  1817.         if (a_valid)

  1818.             field_a = (A[1] & 4) ? 1 : 0;

  1819.         else

  1820.             field_a = 0;

  1821.         if (b_valid)

  1822.             field_b = (B[1] & 4) ? 1 : 0;

  1823.         else

  1824.             field_b = 0;

  1825.         if (c_valid)

  1826.             field_c = (C[1] & 4) ? 1 : 0;

  1827.         else

  1828.             field_c = 0;

  1829. 

  1830.         num_oppfield  = field_a + field_b + field_c;

  1831.         num_samefield = total_valid - num_oppfield;

  1832.         if (total_valid == 3) {

  1833.             if ((num_samefield == 3) || (num_oppfield == 3)) {

  1834.                 px = mid_pred(A[0], B[0], C[0]);

  1835.                 py = mid_pred(A[1], B[1], C[1]);

  1836.             } else if (num_samefield >= num_oppfield) {

  1837.                 /* take one MV from same field set depending on priority

  1838.                 the check for B may not be necessary */

  1839.                 px = !field_a ? A[0] : B[0];

  1840.                 py = !field_a ? A[1] : B[1];

  1841.             } else {

  1842.                 px =  field_a ? A[0] : B[0];

  1843.                 py =  field_a ? A[1] : B[1];

  1844.             }

  1845.         } else if (total_valid == 2) {

  1846.             if (num_samefield >= num_oppfield) {

  1847.                 if (!field_a && a_valid) {

  1848.                     px = A[0];

  1849.                     py = A[1];

  1850.                 } else if (!field_b && b_valid) {

  1851.                     px = B[0];

  1852.                     py = B[1];

  1853.                 } else /*if (c_valid)*/ {

  1854.                     av_assert1(c_valid);

  1855.                     px = C[0];

  1856.                     py = C[1];

  1857.                 } /*else px = py = 0;*/

  1858.             } else {

  1859.                 if (field_a && a_valid) {

  1860.                     px = A[0];

  1861.                     py = A[1];

  1862.                 } else /*if (field_b && b_valid)*/ {

  1863.                     av_assert1(field_b && b_valid);

  1864.                     px = B[0];

  1865.                     py = B[1];

  1866.                 } /*else if (c_valid) {

  1867.                     px = C[0];

  1868.                     py = C[1];

  1869.                 }*/

  1870.             }

  1871.         } else if (total_valid == 1) {

  1872.             px = (a_valid) ? A[0] : ((b_valid) ? B[0] : C[0]);

  1873.             py = (a_valid) ? A[1] : ((b_valid) ? B[1] : C[1]);

  1874.         }

  1875.     }

  1876. 

  1877.     /* store MV using signed modulus of MV range defined in 4.11 */

  1878.     s->mv[dir][n][0] = s->current_picture.motion_val[dir][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1879.     s->mv[dir][n][1] = s->current_picture.motion_val[dir][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1880.     if (mvn == 1) { /* duplicate motion data for 1-MV block */

  1881.         s->current_picture.motion_val[dir][xy +    1    ][0] = s->current_picture.motion_val[dir][xy][0];

  1882.         s->current_picture.motion_val[dir][xy +    1    ][1] = s->current_picture.motion_val[dir][xy][1];

  1883.         s->current_picture.motion_val[dir][xy + wrap    ][0] = s->current_picture.motion_val[dir][xy][0];

  1884.         s->current_picture.motion_val[dir][xy + wrap    ][1] = s->current_picture.motion_val[dir][xy][1];

  1885.         s->current_picture.motion_val[dir][xy + wrap + 1][0] = s->current_picture.motion_val[dir][xy][0];

  1886.         s->current_picture.motion_val[dir][xy + wrap + 1][1] = s->current_picture.motion_val[dir][xy][1];

  1887.     } else if (mvn == 2) { /* duplicate motion data for 2-Field MV block */

  1888.         s->current_picture.motion_val[dir][xy + 1][0] = s->current_picture.motion_val[dir][xy][0];

  1889.         s->current_picture.motion_val[dir][xy + 1][1] = s->current_picture.motion_val[dir][xy][1];

  1890.         s->mv[dir][n + 1][0] = s->mv[dir][n][0];

  1891.         s->mv[dir][n + 1][1] = s->mv[dir][n][1];

  1892.     }

  1893. }

  1894. 

  1895. /** Motion compensation for direct or interpolated blocks in B-frames

  1896.  */

  1897. static void vc1_interp_mc(VC1Context *v)

  1898. {

  1899.     MpegEncContext *s = &v->s;

  1900.     H264ChromaContext *h264chroma = &v->h264chroma;

  1901.     uint8_t *srcY, *srcU, *srcV;

  1902.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1903.     int off, off_uv;

  1904.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  1905.     int use_ic = v->next_use_ic;

  1906. 

  1907.     if (!v->field_mode && !v->s.next_picture.f->data[0])

  1908.         return;

  1909. 

  1910.     mx   = s->mv[1][0][0];

  1911.     my   = s->mv[1][0][1];

  1912.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1913.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1914.     if (v->field_mode) {

  1915.         if (v->cur_field_type != v->ref_field_type[1]) {

  1916.             my   = my   - 2 + 4 * v->cur_field_type;

  1917.             uvmy = uvmy - 2 + 4 * v->cur_field_type;

  1918.         }

  1919.     }

  1920.     if (v->fastuvmc) {

  1921.         uvmx = uvmx + ((uvmx < 0) ? -(uvmx & 1) : (uvmx & 1));

  1922.         uvmy = uvmy + ((uvmy < 0) ? -(uvmy & 1) : (uvmy & 1));

  1923.     }

  1924.     srcY = s->next_picture.f->data[0];

  1925.     srcU = s->next_picture.f->data[1];

  1926.     srcV = s->next_picture.f->data[2];

  1927. 

  1928.     src_x   = s->mb_x * 16 + (mx   >> 2);

  1929.     src_y   = s->mb_y * 16 + (my   >> 2);

  1930.     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);

  1931.     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);

  1932. 

  1933.     if (v->profile != PROFILE_ADVANCED) {

  1934.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1935.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1936.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1937.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1938.     } else {

  1939.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1940.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1941.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1942.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1943.     }

  1944. 

  1945.     srcY += src_y   * s->linesize   + src_x;

  1946.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1947.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1948. 

  1949.     if (v->field_mode && v->ref_field_type[1]) {

  1950.         srcY += s->current_picture_ptr->f->linesize[0];

  1951.         srcU += s->current_picture_ptr->f->linesize[1];

  1952.         srcV += s->current_picture_ptr->f->linesize[2];

  1953.     }

  1954. 

  1955.     /* for grayscale we should not try to read from unknown area */

  1956.     if (s->flags & CODEC_FLAG_GRAY) {

  1957.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1958.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1959.     }

  1960. 

  1961.     if (v->rangeredfrm || s->h_edge_pos < 22 || v_edge_pos < 22 || use_ic

  1962.         || (unsigned)(src_x - 1) > s->h_edge_pos - (mx & 3) - 16 - 3

  1963.         || (unsigned)(src_y - 1) > v_edge_pos    - (my & 3) - 16 - 3) {

  1964.         uint8_t *ubuf = s->edge_emu_buffer + 19 * s->linesize;

  1965.         uint8_t *vbuf = ubuf + 9 * s->uvlinesize;

  1966. 

  1967.         srcY -= s->mspel * (1 + s->linesize);

  1968.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,

  1969.                                  s->linesize, s->linesize,

  1970.                                  17 + s->mspel * 2, 17 + s->mspel * 2,

  1971.                                  src_x - s->mspel, src_y - s->mspel,

  1972.                                  s->h_edge_pos, v_edge_pos);

  1973.         srcY = s->edge_emu_buffer;

  1974.         s->vdsp.emulated_edge_mc(ubuf, srcU,

  1975.                                  s->uvlinesize, s->uvlinesize,

  1976.                                  8 + 1, 8 + 1,

  1977.                                  uvsrc_x, uvsrc_y,

  1978.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  1979.         s->vdsp.emulated_edge_mc(vbuf, srcV,

  1980.                                  s->uvlinesize, s->uvlinesize,

  1981.                                  8 + 1, 8 + 1,

  1982.                                  uvsrc_x, uvsrc_y,

  1983.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  1984.         srcU = ubuf;

  1985.         srcV = vbuf;

  1986.         /* if we deal with range reduction we need to scale source blocks */

  1987.         if (v->rangeredfrm) {

  1988.             int i, j;

  1989.             uint8_t *src, *src2;

  1990. 

  1991.             src = srcY;

  1992.             for (j = 0; j < 17 + s->mspel * 2; j++) {

  1993.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  1994.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1995.                 src += s->linesize;

  1996.             }

  1997.             src = srcU;

  1998.             src2 = srcV;

  1999.             for (j = 0; j < 9; j++) {

  2000.                 for (i = 0; i < 9; i++) {

  2001.                     src[i]  = ((src[i]  - 128) >> 1) + 128;

  2002.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  2003.                 }

  2004.                 src  += s->uvlinesize;

  2005.                 src2 += s->uvlinesize;

  2006.             }

  2007.         }

  2008. 

  2009.         if (use_ic) {

  2010.             uint8_t (*luty )[256] = v->next_luty;

  2011.             uint8_t (*lutuv)[256] = v->next_lutuv;

  2012.             int i, j;

  2013.             uint8_t *src, *src2;

  2014. 

  2015.             src = srcY;

  2016.             for (j = 0; j < 17 + s->mspel * 2; j++) {

  2017.                 int f = v->field_mode ? v->ref_field_type[1] : ((j+src_y - s->mspel) & 1);

  2018.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  2019.                     src[i] = luty[f][src[i]];

  2020.                 src += s->linesize;

  2021.             }

  2022.             src  = srcU;

  2023.             src2 = srcV;

  2024.             for (j = 0; j < 9; j++) {

  2025.                 int f = v->field_mode ? v->ref_field_type[1] : ((j+uvsrc_y) & 1);

  2026.                 for (i = 0; i < 9; i++) {

  2027.                     src[i]  = lutuv[f][src[i]];

  2028.                     src2[i] = lutuv[f][src2[i]];

  2029.                 }

  2030.                 src  += s->uvlinesize;

  2031.                 src2 += s->uvlinesize;

  2032.             }

  2033.         }

  2034.         srcY += s->mspel * (1 + s->linesize);

  2035.     }

  2036. 

  2037.     off    = 0;

  2038.     off_uv = 0;

  2039. 

  2040.     if (s->mspel) {

  2041.         dxy = ((my & 3) << 2) | (mx & 3);

  2042.         v->vc1dsp.avg_vc1_mspel_pixels_tab[0][dxy](s->dest[0] + off    , srcY    , s->linesize, v->rnd);

  2043.     } else { // hpel mc

  2044.         dxy = (my & 2) | ((mx & 2) >> 1);

  2045. 

  2046.         if (!v->rnd)

  2047.             s->hdsp.avg_pixels_tab[0][dxy](s->dest[0] + off, srcY, s->linesize, 16);

  2048.         else

  2049.             s->hdsp.avg_no_rnd_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, 16);

  2050.     }

  2051. 

  2052.     if (s->flags & CODEC_FLAG_GRAY) return;

  2053.     /* Chroma MC always uses qpel blilinear */

  2054.     uvmx = (uvmx & 3) << 1;

  2055.     uvmy = (uvmy & 3) << 1;

  2056.     if (!v->rnd) {

  2057.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  2058.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  2059.     } else {

  2060.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  2061.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  2062.     }

  2063. }

  2064. 

  2065. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  2066. {

  2067.     int n = bfrac;

  2068. 

  2069. #if B_FRACTION_DEN==256

  2070.     if (inv)

  2071.         n -= 256;

  2072.     if (!qs)

  2073.         return 2 * ((value * n + 255) >> 9);

  2074.     return (value * n + 128) >> 8;

  2075. #else

  2076.     if (inv)

  2077.         n -= B_FRACTION_DEN;

  2078.     if (!qs)

  2079.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  2080.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  2081. #endif

  2082. }

  2083. 

  2084. /** Reconstruct motion vector for B-frame and do motion compensation

  2085.  */

  2086. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],

  2087.                             int direct, int mode)

  2088. {

  2089.     if (direct) {

  2090.         vc1_mc_1mv(v, 0);

  2091.         vc1_interp_mc(v);

  2092.         return;

  2093.     }

  2094.     if (mode == BMV_TYPE_INTERPOLATED) {

  2095.         vc1_mc_1mv(v, 0);

  2096.         vc1_interp_mc(v);

  2097.         return;

  2098.     }

  2099. 

  2100.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  2101. }

  2102. 

  2103. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],

  2104.                                  int direct, int mvtype)

  2105. {

  2106.     MpegEncContext *s = &v->s;

  2107.     int xy, wrap, off = 0;

  2108.     int16_t *A, *B, *C;

  2109.     int px, py;

  2110.     int sum;

  2111.     int r_x, r_y;

  2112.     const uint8_t *is_intra = v->mb_type[0];

  2113. 

  2114.     av_assert0(!v->field_mode);

  2115. 

  2116.     r_x = v->range_x;

  2117.     r_y = v->range_y;

  2118.     /* scale MV difference to be quad-pel */

  2119.     dmv_x[0] <<= 1 - s->quarter_sample;

  2120.     dmv_y[0] <<= 1 - s->quarter_sample;

  2121.     dmv_x[1] <<= 1 - s->quarter_sample;

  2122.     dmv_y[1] <<= 1 - s->quarter_sample;

  2123. 

  2124.     wrap = s->b8_stride;

  2125.     xy = s->block_index[0];

  2126. 

  2127.     if (s->mb_intra) {

  2128.         s->current_picture.motion_val[0][xy][0] =

  2129.         s->current_picture.motion_val[0][xy][1] =

  2130.         s->current_picture.motion_val[1][xy][0] =

  2131.         s->current_picture.motion_val[1][xy][1] = 0;

  2132.         return;

  2133.     }

  2134.         if (direct && s->next_picture_ptr->field_picture)

  2135.             av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");

  2136. 

  2137.         s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  2138.         s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  2139.         s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  2140.         s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  2141. 

  2142.         /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  2143.         s->mv[0][0][0] = av_clip(s->mv[0][0][0], -60 - (s->mb_x << 6), (s->mb_width  << 6) - 4 - (s->mb_x << 6));

  2144.         s->mv[0][0][1] = av_clip(s->mv[0][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));

  2145.         s->mv[1][0][0] = av_clip(s->mv[1][0][0], -60 - (s->mb_x << 6), (s->mb_width  << 6) - 4 - (s->mb_x << 6));

  2146.         s->mv[1][0][1] = av_clip(s->mv[1][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));

  2147.     if (direct) {

  2148.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2149.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2150.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2151.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2152.         return;

  2153.     }

  2154. 

  2155.     if ((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2156.         C   = s->current_picture.motion_val[0][xy - 2];

  2157.         A   = s->current_picture.motion_val[0][xy - wrap * 2];

  2158.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2159.         B   = s->current_picture.motion_val[0][xy - wrap * 2 + off];

  2160. 

  2161.         if (!s->mb_x) C[0] = C[1] = 0;

  2162.         if (!s->first_slice_line) { // predictor A is not out of bounds

  2163.             if (s->mb_width == 1) {

  2164.                 px = A[0];

  2165.                 py = A[1];

  2166.             } else {

  2167.                 px = mid_pred(A[0], B[0], C[0]);

  2168.                 py = mid_pred(A[1], B[1], C[1]);

  2169.             }

  2170.         } else if (s->mb_x) { // predictor C is not out of bounds

  2171.             px = C[0];

  2172.             py = C[1];

  2173.         } else {

  2174.             px = py = 0;

  2175.         }

  2176.         /* Pullback MV as specified in 8.3.5.3.4 */

  2177.         {

  2178.             int qx, qy, X, Y;

  2179.             if (v->profile < PROFILE_ADVANCED) {

  2180.                 qx = (s->mb_x << 5);

  2181.                 qy = (s->mb_y << 5);

  2182.                 X  = (s->mb_width  << 5) - 4;

  2183.                 Y  = (s->mb_height << 5) - 4;

  2184.                 if (qx + px < -28) px = -28 - qx;

  2185.                 if (qy + py < -28) py = -28 - qy;

  2186.                 if (qx + px > X) px = X - qx;

  2187.                 if (qy + py > Y) py = Y - qy;

  2188.             } else {

  2189.                 qx = (s->mb_x << 6);

  2190.                 qy = (s->mb_y << 6);

  2191.                 X  = (s->mb_width  << 6) - 4;

  2192.                 Y  = (s->mb_height << 6) - 4;

  2193.                 if (qx + px < -60) px = -60 - qx;

  2194.                 if (qy + py < -60) py = -60 - qy;

  2195.                 if (qx + px > X) px = X - qx;

  2196.                 if (qy + py > Y) py = Y - qy;

  2197.             }

  2198.         }

  2199.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2200.         if (0 && !s->first_slice_line && s->mb_x) {

  2201.             if (is_intra[xy - wrap])

  2202.                 sum = FFABS(px) + FFABS(py);

  2203.             else

  2204.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2205.             if (sum > 32) {

  2206.                 if (get_bits1(&s->gb)) {

  2207.                     px = A[0];

  2208.                     py = A[1];

  2209.                 } else {

  2210.                     px = C[0];

  2211.                     py = C[1];

  2212.                 }

  2213.             } else {

  2214.                 if (is_intra[xy - 2])

  2215.                     sum = FFABS(px) + FFABS(py);

  2216.                 else

  2217.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2218.                 if (sum > 32) {

  2219.                     if (get_bits1(&s->gb)) {

  2220.                         px = A[0];

  2221.                         py = A[1];

  2222.                     } else {

  2223.                         px = C[0];

  2224.                         py = C[1];

  2225.                     }

  2226.                 }

  2227.             }

  2228.         }

  2229.         /* store MV using signed modulus of MV range defined in 4.11 */

  2230.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2231.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2232.     }

  2233.     if ((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2234.         C   = s->current_picture.motion_val[1][xy - 2];

  2235.         A   = s->current_picture.motion_val[1][xy - wrap * 2];

  2236.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2237.         B   = s->current_picture.motion_val[1][xy - wrap * 2 + off];

  2238. 

  2239.         if (!s->mb_x)

  2240.             C[0] = C[1] = 0;

  2241.         if (!s->first_slice_line) { // predictor A is not out of bounds

  2242.             if (s->mb_width == 1) {

  2243.                 px = A[0];

  2244.                 py = A[1];

  2245.             } else {

  2246.                 px = mid_pred(A[0], B[0], C[0]);

  2247.                 py = mid_pred(A[1], B[1], C[1]);

  2248.             }

  2249.         } else if (s->mb_x) { // predictor C is not out of bounds

  2250.             px = C[0];

  2251.             py = C[1];

  2252.         } else {

  2253.             px = py = 0;

  2254.         }

  2255.         /* Pullback MV as specified in 8.3.5.3.4 */

  2256.         {

  2257.             int qx, qy, X, Y;

  2258.             if (v->profile < PROFILE_ADVANCED) {

  2259.                 qx = (s->mb_x << 5);

  2260.                 qy = (s->mb_y << 5);

  2261.                 X  = (s->mb_width  << 5) - 4;

  2262.                 Y  = (s->mb_height << 5) - 4;

  2263.                 if (qx + px < -28) px = -28 - qx;

  2264.                 if (qy + py < -28) py = -28 - qy;

  2265.                 if (qx + px > X) px = X - qx;

  2266.                 if (qy + py > Y) py = Y - qy;

  2267.             } else {

  2268.                 qx = (s->mb_x << 6);

  2269.                 qy = (s->mb_y << 6);

  2270.                 X  = (s->mb_width  << 6) - 4;

  2271.                 Y  = (s->mb_height << 6) - 4;

  2272.                 if (qx + px < -60) px = -60 - qx;

  2273.                 if (qy + py < -60) py = -60 - qy;

  2274.                 if (qx + px > X) px = X - qx;

  2275.                 if (qy + py > Y) py = Y - qy;

  2276.             }

  2277.         }

  2278.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2279.         if (0 && !s->first_slice_line && s->mb_x) {

  2280.             if (is_intra[xy - wrap])

  2281.                 sum = FFABS(px) + FFABS(py);

  2282.             else

  2283.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2284.             if (sum > 32) {

  2285.                 if (get_bits1(&s->gb)) {

  2286.                     px = A[0];

  2287.                     py = A[1];

  2288.                 } else {

  2289.                     px = C[0];

  2290.                     py = C[1];

  2291.                 }

  2292.             } else {

  2293.                 if (is_intra[xy - 2])

  2294.                     sum = FFABS(px) + FFABS(py);

  2295.                 else

  2296.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2297.                 if (sum > 32) {

  2298.                     if (get_bits1(&s->gb)) {

  2299.                         px = A[0];

  2300.                         py = A[1];

  2301.                     } else {

  2302.                         px = C[0];

  2303.                         py = C[1];

  2304.                     }

  2305.                 }

  2306.             }

  2307.         }

  2308.         /* store MV using signed modulus of MV range defined in 4.11 */

  2309. 

  2310.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2311.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2312.     }

  2313.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2314.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2315.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2316.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2317. }

  2318. 

  2319. static inline void vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, int mv1, int *pred_flag)

  2320. {

  2321.     int dir = (v->bmvtype == BMV_TYPE_BACKWARD) ? 1 : 0;

  2322.     MpegEncContext *s = &v->s;

  2323.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2324. 

  2325.     if (v->bmvtype == BMV_TYPE_DIRECT) {

  2326.         int total_opp, k, f;

  2327.         if (s->next_picture.mb_type[mb_pos + v->mb_off] != MB_TYPE_INTRA) {

  2328.             s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],

  2329.                                       v->bfraction, 0, s->quarter_sample);

  2330.             s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1],

  2331.                                       v->bfraction, 0, s->quarter_sample);

  2332.             s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],

  2333.                                       v->bfraction, 1, s->quarter_sample);

  2334.             s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1],

  2335.                                       v->bfraction, 1, s->quarter_sample);

  2336. 

  2337.             total_opp = v->mv_f_next[0][s->block_index[0] + v->blocks_off]

  2338.                       + v->mv_f_next[0][s->block_index[1] + v->blocks_off]

  2339.                       + v->mv_f_next[0][s->block_index[2] + v->blocks_off]

  2340.                       + v->mv_f_next[0][s->block_index[3] + v->blocks_off];

  2341.             f = (total_opp > 2) ? 1 : 0;

  2342.         } else {

  2343.             s->mv[0][0][0] = s->mv[0][0][1] = 0;

  2344.             s->mv[1][0][0] = s->mv[1][0][1] = 0;

  2345.             f = 0;

  2346.         }

  2347.         v->ref_field_type[0] = v->ref_field_type[1] = v->cur_field_type ^ f;

  2348.         for (k = 0; k < 4; k++) {

  2349.             s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][0] = s->mv[0][0][0];

  2350.             s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][1] = s->mv[0][0][1];

  2351.             s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][0] = s->mv[1][0][0];

  2352.             s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][1] = s->mv[1][0][1];

  2353.             v->mv_f[0][s->block_index[k] + v->blocks_off] = f;

  2354.             v->mv_f[1][s->block_index[k] + v->blocks_off] = f;

  2355.         }

  2356.         return;

  2357.     }

  2358.     if (v->bmvtype == BMV_TYPE_INTERPOLATED) {

  2359.         vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0],   1, v->range_x, v->range_y, v->mb_type[0], pred_flag[0], 0);

  2360.         vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1],   1, v->range_x, v->range_y, v->mb_type[0], pred_flag[1], 1);

  2361.         return;

  2362.     }

  2363.     if (dir) { // backward

  2364.         vc1_pred_mv(v, n, dmv_x[1], dmv_y[1], mv1, v->range_x, v->range_y, v->mb_type[0], pred_flag[1], 1);

  2365.         if (n == 3 || mv1) {

  2366.             vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0],   1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  2367.         }

  2368.     } else { // forward

  2369.         vc1_pred_mv(v, n, dmv_x[0], dmv_y[0], mv1, v->range_x, v->range_y, v->mb_type[0], pred_flag[0], 0);

  2370.         if (n == 3 || mv1) {

  2371.             vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1],   1, v->range_x, v->range_y, v->mb_type[0], 0, 1);

  2372.         }

  2373.     }

  2374. }

  2375. 

  2376. /** Get predicted DC value for I-frames only

  2377.  * prediction dir: left=0, top=1

  2378.  * @param s MpegEncContext

  2379.  * @param overlap flag indicating that overlap filtering is used

  2380.  * @param pq integer part of picture quantizer

  2381.  * @param[in] n block index in the current MB

  2382.  * @param dc_val_ptr Pointer to DC predictor

  2383.  * @param dir_ptr Prediction direction for use in AC prediction

  2384.  */

  2385. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2386.                                 int16_t **dc_val_ptr, int *dir_ptr)

  2387. {

  2388.     int a, b, c, wrap, pred, scale;

  2389.     int16_t *dc_val;

  2390.     static const uint16_t dcpred[32] = {

  2391.         -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2392.              114,  102,   93,   85,   79,   73,   68,   64,

  2393.               60,   57,   54,   51,   49,   47,   45,   43,

  2394.               41,   39,   38,   37,   35,   34,   33

  2395.     };

  2396. 

  2397.     /* find prediction - wmv3_dc_scale always used here in fact */

  2398.     if (n < 4) scale = s->y_dc_scale;

  2399.     else       scale = s->c_dc_scale;

  2400. 

  2401.     wrap   = s->block_wrap[n];

  2402.     dc_val = s->dc_val[0] + s->block_index[n];

  2403. 

  2404.     /* B A

  2405.      * C X

  2406.      */

  2407.     c = dc_val[ - 1];

  2408.     b = dc_val[ - 1 - wrap];

  2409.     a = dc_val[ - wrap];

  2410. 

  2411.     if (pq < 9 || !overlap) {

  2412.         /* Set outer values */

  2413.         if (s->first_slice_line && (n != 2 && n != 3))

  2414.             b = a = dcpred[scale];

  2415.         if (s->mb_x == 0 && (n != 1 && n != 3))

  2416.             b = c = dcpred[scale];

  2417.     } else {

  2418.         /* Set outer values */

  2419.         if (s->first_slice_line && (n != 2 && n != 3))

  2420.             b = a = 0;

  2421.         if (s->mb_x == 0 && (n != 1 && n != 3))

  2422.             b = c = 0;

  2423.     }

  2424. 

  2425.     if (abs(a - b) <= abs(b - c)) {

  2426.         pred     = c;

  2427.         *dir_ptr = 1; // left

  2428.     } else {

  2429.         pred     = a;

  2430.         *dir_ptr = 0; // top

  2431.     }

  2432. 

  2433.     /* update predictor */

  2434.     *dc_val_ptr = &dc_val[0];

  2435.     return pred;

  2436. }

  2437. 

  2438. 

  2439. /** Get predicted DC value

  2440.  * prediction dir: left=0, top=1

  2441.  * @param s MpegEncContext

  2442.  * @param overlap flag indicating that overlap filtering is used

  2443.  * @param pq integer part of picture quantizer

  2444.  * @param[in] n block index in the current MB

  2445.  * @param a_avail flag indicating top block availability

  2446.  * @param c_avail flag indicating left block availability

  2447.  * @param dc_val_ptr Pointer to DC predictor

  2448.  * @param dir_ptr Prediction direction for use in AC prediction

  2449.  */

  2450. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2451.                               int a_avail, int c_avail,

  2452.                               int16_t **dc_val_ptr, int *dir_ptr)

  2453. {

  2454.     int a, b, c, wrap, pred;

  2455.     int16_t *dc_val;

  2456.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2457.     int q1, q2 = 0;

  2458.     int dqscale_index;

  2459. 

  2460.     wrap = s->block_wrap[n];

  2461.     dc_val = s->dc_val[0] + s->block_index[n];

  2462. 

  2463.     /* B A

  2464.      * C X

  2465.      */

  2466.     c = dc_val[ - 1];

  2467.     b = dc_val[ - 1 - wrap];

  2468.     a = dc_val[ - wrap];

  2469.     /* scale predictors if needed */

  2470.     q1 = s->current_picture.qscale_table[mb_pos];

  2471.     dqscale_index = s->y_dc_scale_table[q1] - 1;

  2472.     if (dqscale_index < 0)

  2473.         return 0;

  2474.     if (c_avail && (n != 1 && n != 3)) {

  2475.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2476.         if (q2 && q2 != q1)

  2477.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;

  2478.     }

  2479.     if (a_avail && (n != 2 && n != 3)) {

  2480.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2481.         if (q2 && q2 != q1)

  2482.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;

  2483.     }

  2484.     if (a_avail && c_avail && (n != 3)) {

  2485.         int off = mb_pos;

  2486.         if (n != 1)

  2487.             off--;

  2488.         if (n != 2)

  2489.             off -= s->mb_stride;

  2490.         q2 = s->current_picture.qscale_table[off];

  2491.         if (q2 && q2 != q1)

  2492.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;

  2493.     }

  2494. 

  2495.     if (a_avail && c_avail) {

  2496.         if (abs(a - b) <= abs(b - c)) {

  2497.             pred     = c;

  2498.             *dir_ptr = 1; // left

  2499.         } else {

  2500.             pred     = a;

  2501.             *dir_ptr = 0; // top

  2502.         }

  2503.     } else if (a_avail) {

  2504.         pred     = a;

  2505.         *dir_ptr = 0; // top

  2506.     } else if (c_avail) {

  2507.         pred     = c;

  2508.         *dir_ptr = 1; // left

  2509.     } else {

  2510.         pred     = 0;

  2511.         *dir_ptr = 1; // left

  2512.     }

  2513. 

  2514.     /* update predictor */

  2515.     *dc_val_ptr = &dc_val[0];

  2516.     return pred;

  2517. }

  2518. 

  2519. /** @} */ // Block group

  2520. 

  2521. /**

  2522.  * @name VC1 Macroblock-level functions in Simple/Main Profiles

  2523.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2524.  * @{

  2525.  */

  2526. 

  2527. static inline int vc1_coded_block_pred(MpegEncContext * s, int n,

  2528.                                        uint8_t **coded_block_ptr)

  2529. {

  2530.     int xy, wrap, pred, a, b, c;

  2531. 

  2532.     xy   = s->block_index[n];

  2533.     wrap = s->b8_stride;

  2534. 

  2535.     /* B C

  2536.      * A X

  2537.      */

  2538.     a = s->coded_block[xy - 1       ];

  2539.     b = s->coded_block[xy - 1 - wrap];

  2540.     c = s->coded_block[xy     - wrap];

  2541. 

  2542.     if (b == c) {

  2543.         pred = a;

  2544.     } else {

  2545.         pred = c;

  2546.     }

  2547. 

  2548.     /* store value */

  2549.     *coded_block_ptr = &s->coded_block[xy];

  2550. 

  2551.     return pred;

  2552. }

  2553. 

  2554. /**

  2555.  * Decode one AC coefficient

  2556.  * @param v The VC1 context

  2557.  * @param last Last coefficient

  2558.  * @param skip How much zero coefficients to skip

  2559.  * @param value Decoded AC coefficient value

  2560.  * @param codingset set of VLC to decode data

  2561.  * @see 8.1.3.4

  2562.  */

  2563. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,

  2564.                                 int *value, int codingset)

  2565. {

  2566.     GetBitContext *gb = &v->s.gb;

  2567.     int index, escape, run = 0, level = 0, lst = 0;

  2568. 

  2569.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2570.     if (index != ff_vc1_ac_sizes[codingset] - 1) {

  2571.         run   = vc1_index_decode_table[codingset][index][0];

  2572.         level = vc1_index_decode_table[codingset][index][1];

  2573.         lst   = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;

  2574.         if (get_bits1(gb))

  2575.             level = -level;

  2576.     } else {

  2577.         escape = decode210(gb);

  2578.         if (escape != 2) {

  2579.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2580.             run   = vc1_index_decode_table[codingset][index][0];

  2581.             level = vc1_index_decode_table[codingset][index][1];

  2582.             lst   = index >= vc1_last_decode_table[codingset];

  2583.             if (escape == 0) {

  2584.                 if (lst)

  2585.                     level += vc1_last_delta_level_table[codingset][run];

  2586.                 else

  2587.                     level += vc1_delta_level_table[codingset][run];

  2588.             } else {

  2589.                 if (lst)

  2590.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2591.                 else

  2592.                     run += vc1_delta_run_table[codingset][level] + 1;

  2593.             }

  2594.             if (get_bits1(gb))

  2595.                 level = -level;

  2596.         } else {

  2597.             int sign;

  2598.             lst = get_bits1(gb);

  2599.             if (v->s.esc3_level_length == 0) {

  2600.                 if (v->pq < 8 || v->dquantfrm) { // table 59

  2601.                     v->s.esc3_level_length = get_bits(gb, 3);

  2602.                     if (!v->s.esc3_level_length)

  2603.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2604.                 } else { // table 60

  2605.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2606.                 }

  2607.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2608.             }

  2609.             run   = get_bits(gb, v->s.esc3_run_length);

  2610.             sign  = get_bits1(gb);

  2611.             level = get_bits(gb, v->s.esc3_level_length);

  2612.             if (sign)

  2613.                 level = -level;

  2614.         }

  2615.     }

  2616. 

  2617.     *last  = lst;

  2618.     *skip  = run;

  2619.     *value = level;

  2620. }

  2621. 

  2622. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2623.  * @param v VC1Context

  2624.  * @param block block to decode

  2625.  * @param[in] n subblock index

  2626.  * @param coded are AC coeffs present or not

  2627.  * @param codingset set of VLC to decode data

  2628.  */

  2629. static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,

  2630.                               int coded, int codingset)

  2631. {

  2632.     GetBitContext *gb = &v->s.gb;

  2633.     MpegEncContext *s = &v->s;

  2634.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2635.     int i;

  2636.     int16_t *dc_val;

  2637.     int16_t *ac_val, *ac_val2;

  2638.     int dcdiff;

  2639. 

  2640.     /* Get DC differential */

  2641.     if (n < 4) {

  2642.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2643.     } else {

  2644.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2645.     }

  2646.     if (dcdiff < 0) {

  2647.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2648.         return -1;

  2649.     }

  2650.     if (dcdiff) {

  2651.         if (dcdiff == 119 /* ESC index value */) {

  2652.             /* TODO: Optimize */

  2653.             if (v->pq == 1)      dcdiff = get_bits(gb, 10);

  2654.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2655.             else                 dcdiff = get_bits(gb, 8);

  2656.         } else {

  2657.             if (v->pq == 1)

  2658.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  2659.             else if (v->pq == 2)

  2660.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  2661.         }

  2662.         if (get_bits1(gb))

  2663.             dcdiff = -dcdiff;

  2664.     }

  2665. 

  2666.     /* Prediction */

  2667.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2668.     *dc_val = dcdiff;

  2669. 

  2670.     /* Store the quantized DC coeff, used for prediction */

  2671.     if (n < 4) {

  2672.         block[0] = dcdiff * s->y_dc_scale;

  2673.     } else {

  2674.         block[0] = dcdiff * s->c_dc_scale;

  2675.     }

  2676.     /* Skip ? */

  2677.     if (!coded) {

  2678.         goto not_coded;

  2679.     }

  2680. 

  2681.     // AC Decoding

  2682.     i = 1;

  2683. 

  2684.     {

  2685.         int last = 0, skip, value;

  2686.         const uint8_t *zz_table;

  2687.         int scale;

  2688.         int k;

  2689. 

  2690.         scale = v->pq * 2 + v->halfpq;

  2691. 

  2692.         if (v->s.ac_pred) {

  2693.             if (!dc_pred_dir)

  2694.                 zz_table = v->zz_8x8[2];

  2695.             else

  2696.                 zz_table = v->zz_8x8[3];

  2697.         } else

  2698.             zz_table = v->zz_8x8[1];

  2699. 

  2700.         ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2701.         ac_val2 = ac_val;

  2702.         if (dc_pred_dir) // left

  2703.             ac_val -= 16;

  2704.         else // top

  2705.             ac_val -= 16 * s->block_wrap[n];

  2706. 

  2707.         while (!last) {

  2708.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2709.             i += skip;

  2710.             if (i > 63)

  2711.                 break;

  2712.             block[zz_table[i++]] = value;

  2713.         }

  2714. 

  2715.         /* apply AC prediction if needed */

  2716.         if (s->ac_pred) {

  2717.             if (dc_pred_dir) { // left

  2718.                 for (k = 1; k < 8; k++)

  2719.                     block[k << v->left_blk_sh] += ac_val[k];

  2720.             } else { // top

  2721.                 for (k = 1; k < 8; k++)

  2722.                     block[k << v->top_blk_sh] += ac_val[k + 8];

  2723.             }

  2724.         }

  2725.         /* save AC coeffs for further prediction */

  2726.         for (k = 1; k < 8; k++) {

  2727.             ac_val2[k]     = block[k << v->left_blk_sh];

  2728.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  2729.         }

  2730. 

  2731.         /* scale AC coeffs */

  2732.         for (k = 1; k < 64; k++)

  2733.             if (block[k]) {

  2734.                 block[k] *= scale;

  2735.                 if (!v->pquantizer)

  2736.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2737.             }

  2738. 

  2739.         if (s->ac_pred) i = 63;

  2740.     }

  2741. 

  2742. not_coded:

  2743.     if (!coded) {

  2744.         int k, scale;

  2745.         ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2746.         ac_val2 = ac_val;

  2747. 

  2748.         i = 0;

  2749.         scale = v->pq * 2 + v->halfpq;

  2750.         memset(ac_val2, 0, 16 * 2);

  2751.         if (dc_pred_dir) { // left

  2752.             ac_val -= 16;

  2753.             if (s->ac_pred)

  2754.                 memcpy(ac_val2, ac_val, 8 * 2);

  2755.         } else { // top

  2756.             ac_val -= 16 * s->block_wrap[n];

  2757.             if (s->ac_pred)

  2758.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2759.         }

  2760. 

  2761.         /* apply AC prediction if needed */

  2762.         if (s->ac_pred) {

  2763.             if (dc_pred_dir) { //left

  2764.                 for (k = 1; k < 8; k++) {

  2765.                     block[k << v->left_blk_sh] = ac_val[k] * scale;

  2766.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  2767.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -v->pq : v->pq;

  2768.                 }

  2769.             } else { // top

  2770.                 for (k = 1; k < 8; k++) {

  2771.                     block[k << v->top_blk_sh] = ac_val[k + 8] * scale;

  2772.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  2773.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -v->pq : v->pq;

  2774.                 }

  2775.             }

  2776.             i = 63;

  2777.         }

  2778.     }

  2779.     s->block_last_index[n] = i;

  2780. 

  2781.     return 0;

  2782. }

  2783. 

  2784. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2785.  * @param v VC1Context

  2786.  * @param block block to decode

  2787.  * @param[in] n subblock number

  2788.  * @param coded are AC coeffs present or not

  2789.  * @param codingset set of VLC to decode data

  2790.  * @param mquant quantizer value for this macroblock

  2791.  */

  2792. static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,

  2793.                                   int coded, int codingset, int mquant)

  2794. {

  2795.     GetBitContext *gb = &v->s.gb;

  2796.     MpegEncContext *s = &v->s;

  2797.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2798.     int i;

  2799.     int16_t *dc_val = NULL;

  2800.     int16_t *ac_val, *ac_val2;

  2801.     int dcdiff;

  2802.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2803.     int use_pred = s->ac_pred;

  2804.     int scale;

  2805.     int q1, q2 = 0;

  2806.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2807. 

  2808.     /* Get DC differential */

  2809.     if (n < 4) {

  2810.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2811.     } else {

  2812.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2813.     }

  2814.     if (dcdiff < 0) {

  2815.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2816.         return -1;

  2817.     }

  2818.     if (dcdiff) {

  2819.         if (dcdiff == 119 /* ESC index value */) {

  2820.             /* TODO: Optimize */

  2821.             if (mquant == 1)      dcdiff = get_bits(gb, 10);

  2822.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2823.             else                  dcdiff = get_bits(gb, 8);

  2824.         } else {

  2825.             if (mquant == 1)

  2826.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  2827.             else if (mquant == 2)

  2828.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  2829.         }

  2830.         if (get_bits1(gb))

  2831.             dcdiff = -dcdiff;

  2832.     }

  2833. 

  2834.     /* Prediction */

  2835.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2836.     *dc_val = dcdiff;

  2837. 

  2838.     /* Store the quantized DC coeff, used for prediction */

  2839.     if (n < 4) {

  2840.         block[0] = dcdiff * s->y_dc_scale;

  2841.     } else {

  2842.         block[0] = dcdiff * s->c_dc_scale;

  2843.     }

  2844. 

  2845.     //AC Decoding

  2846.     i = 1;

  2847. 

  2848.     /* check if AC is needed at all */

  2849.     if (!a_avail && !c_avail)

  2850.         use_pred = 0;

  2851.     ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2852.     ac_val2 = ac_val;

  2853. 

  2854.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2855. 

  2856.     if (dc_pred_dir) // left

  2857.         ac_val -= 16;

  2858.     else // top

  2859.         ac_val -= 16 * s->block_wrap[n];

  2860. 

  2861.     q1 = s->current_picture.qscale_table[mb_pos];

  2862.     if ( dc_pred_dir && c_avail && mb_pos)

  2863.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2864.     if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)

  2865.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2866.     if ( dc_pred_dir && n == 1)

  2867.         q2 = q1;

  2868.     if (!dc_pred_dir && n == 2)

  2869.         q2 = q1;

  2870.     if (n == 3)

  2871.         q2 = q1;

  2872. 

  2873.     if (coded) {

  2874.         int last = 0, skip, value;

  2875.         const uint8_t *zz_table;

  2876.         int k;

  2877. 

  2878.         if (v->s.ac_pred) {

  2879.             if (!use_pred && v->fcm == ILACE_FRAME) {

  2880.                 zz_table = v->zzi_8x8;

  2881.             } else {

  2882.                 if (!dc_pred_dir) // top

  2883.                     zz_table = v->zz_8x8[2];

  2884.                 else // left

  2885.                     zz_table = v->zz_8x8[3];

  2886.             }

  2887.         } else {

  2888.             if (v->fcm != ILACE_FRAME)

  2889.                 zz_table = v->zz_8x8[1];

  2890.             else

  2891.                 zz_table = v->zzi_8x8;

  2892.         }

  2893. 

  2894.         while (!last) {

  2895.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2896.             i += skip;

  2897.             if (i > 63)

  2898.                 break;

  2899.             block[zz_table[i++]] = value;

  2900.         }

  2901. 

  2902.         /* apply AC prediction if needed */

  2903.         if (use_pred) {

  2904.             /* scale predictors if needed*/

  2905.             if (q2 && q1 != q2) {

  2906.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2907.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2908. 

  2909.                 if (q1 < 1)

  2910.                     return AVERROR_INVALIDDATA;

  2911.                 if (dc_pred_dir) { // left

  2912.                     for (k = 1; k < 8; k++)

  2913.                         block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2914.                 } else { // top

  2915.                     for (k = 1; k < 8; k++)

  2916.                         block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2917.                 }

  2918.             } else {

  2919.                 if (dc_pred_dir) { //left

  2920.                     for (k = 1; k < 8; k++)

  2921.                         block[k << v->left_blk_sh] += ac_val[k];

  2922.                 } else { //top

  2923.                     for (k = 1; k < 8; k++)

  2924.                         block[k << v->top_blk_sh] += ac_val[k + 8];

  2925.                 }

  2926.             }

  2927.         }

  2928.         /* save AC coeffs for further prediction */

  2929.         for (k = 1; k < 8; k++) {

  2930.             ac_val2[k    ] = block[k << v->left_blk_sh];

  2931.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  2932.         }

  2933. 

  2934.         /* scale AC coeffs */

  2935.         for (k = 1; k < 64; k++)

  2936.             if (block[k]) {

  2937.                 block[k] *= scale;

  2938.                 if (!v->pquantizer)

  2939.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2940.             }

  2941. 

  2942.         if (use_pred) i = 63;

  2943.     } else { // no AC coeffs

  2944.         int k;

  2945. 

  2946.         memset(ac_val2, 0, 16 * 2);

  2947.         if (dc_pred_dir) { // left

  2948.             if (use_pred) {

  2949.                 memcpy(ac_val2, ac_val, 8 * 2);

  2950.                 if (q2 && q1 != q2) {

  2951.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2952.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2953.                     if (q1 < 1)

  2954.                         return AVERROR_INVALIDDATA;

  2955.                     for (k = 1; k < 8; k++)

  2956.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2957.                 }

  2958.             }

  2959.         } else { // top

  2960.             if (use_pred) {

  2961.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2962.                 if (q2 && q1 != q2) {

  2963.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2964.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2965.                     if (q1 < 1)

  2966.                         return AVERROR_INVALIDDATA;

  2967.                     for (k = 1; k < 8; k++)

  2968.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2969.                 }

  2970.             }

  2971.         }

  2972. 

  2973.         /* apply AC prediction if needed */

  2974.         if (use_pred) {

  2975.             if (dc_pred_dir) { // left

  2976.                 for (k = 1; k < 8; k++) {

  2977.                     block[k << v->left_blk_sh] = ac_val2[k] * scale;

  2978.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  2979.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;

  2980.                 }

  2981.             } else { // top

  2982.                 for (k = 1; k < 8; k++) {

  2983.                     block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;

  2984.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  2985.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;

  2986.                 }

  2987.             }

  2988.             i = 63;

  2989.         }

  2990.     }

  2991.     s->block_last_index[n] = i;

  2992. 

  2993.     return 0;

  2994. }

  2995. 

  2996. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2997.  * @param v VC1Context

  2998.  * @param block block to decode

  2999.  * @param[in] n subblock index

  3000.  * @param coded are AC coeffs present or not

  3001.  * @param mquant block quantizer

  3002.  * @param codingset set of VLC to decode data

  3003.  */

  3004. static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,

  3005.                                   int coded, int mquant, int codingset)

  3006. {

  3007.     GetBitContext *gb = &v->s.gb;

  3008.     MpegEncContext *s = &v->s;

  3009.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  3010.     int i;

  3011.     int16_t *dc_val = NULL;

  3012.     int16_t *ac_val, *ac_val2;

  3013.     int dcdiff;

  3014.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3015.     int a_avail = v->a_avail, c_avail = v->c_avail;

  3016.     int use_pred = s->ac_pred;

  3017.     int scale;

  3018.     int q1, q2 = 0;

  3019. 

  3020.     s->bdsp.clear_block(block);

  3021. 

  3022.     /* XXX: Guard against dumb values of mquant */

  3023.     mquant = (mquant < 1) ? 0 : ((mquant > 31) ? 31 : mquant);

  3024. 

  3025.     /* Set DC scale - y and c use the same */

  3026.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  3027.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  3028. 

  3029.     /* Get DC differential */

  3030.     if (n < 4) {

  3031.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  3032.     } else {

  3033.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  3034.     }

  3035.     if (dcdiff < 0) {

  3036.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  3037.         return -1;

  3038.     }

  3039.     if (dcdiff) {

  3040.         if (dcdiff == 119 /* ESC index value */) {

  3041.             /* TODO: Optimize */

  3042.             if (mquant == 1)      dcdiff = get_bits(gb, 10);

  3043.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  3044.             else                  dcdiff = get_bits(gb, 8);

  3045.         } else {

  3046.             if (mquant == 1)

  3047.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  3048.             else if (mquant == 2)

  3049.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  3050.         }

  3051.         if (get_bits1(gb))

  3052.             dcdiff = -dcdiff;

  3053.     }

  3054. 

  3055.     /* Prediction */

  3056.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  3057.     *dc_val = dcdiff;

  3058. 

  3059.     /* Store the quantized DC coeff, used for prediction */

  3060. 

  3061.     if (n < 4) {

  3062.         block[0] = dcdiff * s->y_dc_scale;

  3063.     } else {

  3064.         block[0] = dcdiff * s->c_dc_scale;

  3065.     }

  3066. 

  3067.     //AC Decoding

  3068.     i = 1;

  3069. 

  3070.     /* check if AC is needed at all and adjust direction if needed */

  3071.     if (!a_avail) dc_pred_dir = 1;

  3072.     if (!c_avail) dc_pred_dir = 0;

  3073.     if (!a_avail && !c_avail) use_pred = 0;

  3074.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  3075.     ac_val2 = ac_val;

  3076. 

  3077.     scale = mquant * 2 + v->halfpq;

  3078. 

  3079.     if (dc_pred_dir) //left

  3080.         ac_val -= 16;

  3081.     else //top

  3082.         ac_val -= 16 * s->block_wrap[n];

  3083. 

  3084.     q1 = s->current_picture.qscale_table[mb_pos];

  3085.     if (dc_pred_dir && c_avail && mb_pos)

  3086.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  3087.     if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)

  3088.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  3089.     if ( dc_pred_dir && n == 1)

  3090.         q2 = q1;

  3091.     if (!dc_pred_dir && n == 2)

  3092.         q2 = q1;

  3093.     if (n == 3) q2 = q1;

  3094. 

  3095.     if (coded) {

  3096.         int last = 0, skip, value;

  3097.         int k;

  3098. 

  3099.         while (!last) {

  3100.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  3101.             i += skip;

  3102.             if (i > 63)

  3103.                 break;

  3104.             if (v->fcm == PROGRESSIVE)

  3105.                 block[v->zz_8x8[0][i++]] = value;

  3106.             else {

  3107.                 if (use_pred && (v->fcm == ILACE_FRAME)) {

  3108.                     if (!dc_pred_dir) // top

  3109.                         block[v->zz_8x8[2][i++]] = value;

  3110.                     else // left

  3111.                         block[v->zz_8x8[3][i++]] = value;

  3112.                 } else {

  3113.                     block[v->zzi_8x8[i++]] = value;

  3114.                 }

  3115.             }

  3116.         }

  3117. 

  3118.         /* apply AC prediction if needed */

  3119.         if (use_pred) {

  3120.             /* scale predictors if needed*/

  3121.             if (q2 && q1 != q2) {

  3122.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3123.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3124. 

  3125.                 if (q1 < 1)

  3126.                     return AVERROR_INVALIDDATA;

  3127.                 if (dc_pred_dir) { // left

  3128.                     for (k = 1; k < 8; k++)

  3129.                         block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3130.                 } else { //top

  3131.                     for (k = 1; k < 8; k++)

  3132.                         block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3133.                 }

  3134.             } else {

  3135.                 if (dc_pred_dir) { // left

  3136.                     for (k = 1; k < 8; k++)

  3137.                         block[k << v->left_blk_sh] += ac_val[k];

  3138.                 } else { // top

  3139.                     for (k = 1; k < 8; k++)

  3140.                         block[k << v->top_blk_sh] += ac_val[k + 8];

  3141.                 }

  3142.             }

  3143.         }

  3144.         /* save AC coeffs for further prediction */

  3145.         for (k = 1; k < 8; k++) {

  3146.             ac_val2[k    ] = block[k << v->left_blk_sh];

  3147.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  3148.         }

  3149. 

  3150.         /* scale AC coeffs */

  3151.         for (k = 1; k < 64; k++)

  3152.             if (block[k]) {

  3153.                 block[k] *= scale;

  3154.                 if (!v->pquantizer)

  3155.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  3156.             }

  3157. 

  3158.         if (use_pred) i = 63;

  3159.     } else { // no AC coeffs

  3160.         int k;

  3161. 

  3162.         memset(ac_val2, 0, 16 * 2);

  3163.         if (dc_pred_dir) { // left

  3164.             if (use_pred) {

  3165.                 memcpy(ac_val2, ac_val, 8 * 2);

  3166.                 if (q2 && q1 != q2) {

  3167.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3168.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3169.                     if (q1 < 1)

  3170.                         return AVERROR_INVALIDDATA;

  3171.                     for (k = 1; k < 8; k++)

  3172.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3173.                 }

  3174.             }

  3175.         } else { // top

  3176.             if (use_pred) {

  3177.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  3178.                 if (q2 && q1 != q2) {

  3179.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3180.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3181.                     if (q1 < 1)

  3182.                         return AVERROR_INVALIDDATA;

  3183.                     for (k = 1; k < 8; k++)

  3184.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3185.                 }

  3186.             }

  3187.         }

  3188. 

  3189.         /* apply AC prediction if needed */

  3190.         if (use_pred) {

  3191.             if (dc_pred_dir) { // left

  3192.                 for (k = 1; k < 8; k++) {

  3193.                     block[k << v->left_blk_sh] = ac_val2[k] * scale;

  3194.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  3195.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;

  3196.                 }

  3197.             } else { // top

  3198.                 for (k = 1; k < 8; k++) {

  3199.                     block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;

  3200.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  3201.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;

  3202.                 }

  3203.             }

  3204.             i = 63;

  3205.         }

  3206.     }

  3207.     s->block_last_index[n] = i;

  3208. 

  3209.     return 0;

  3210. }

  3211. 

  3212. /** Decode P block

  3213.  */

  3214. static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,

  3215.                               int mquant, int ttmb, int first_block,

  3216.                               uint8_t *dst, int linesize, int skip_block,

  3217.                               int *ttmb_out)

  3218. {

  3219.     MpegEncContext *s = &v->s;

  3220.     GetBitContext *gb = &s->gb;

  3221.     int i, j;

  3222.     int subblkpat = 0;

  3223.     int scale, off, idx, last, skip, value;

  3224.     int ttblk = ttmb & 7;

  3225.     int pat = 0;

  3226. 

  3227.     s->bdsp.clear_block(block);

  3228. 

  3229.     if (ttmb == -1) {

  3230.         ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];

  3231.     }

  3232.     if (ttblk == TT_4X4) {

  3233.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  3234.     }

  3235.     if ((ttblk != TT_8X8 && ttblk != TT_4X4)

  3236.         && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))

  3237.             || (!v->res_rtm_flag && !first_block))) {

  3238.         subblkpat = decode012(gb);

  3239.         if (subblkpat)

  3240.             subblkpat ^= 3; // swap decoded pattern bits

  3241.         if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)

  3242.             ttblk = TT_8X4;

  3243.         if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)

  3244.             ttblk = TT_4X8;

  3245.     }

  3246.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  3247. 

  3248.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  3249.     if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  3250.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  3251.         ttblk     = TT_8X4;

  3252.     }

  3253.     if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  3254.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  3255.         ttblk     = TT_4X8;

  3256.     }

  3257.     switch (ttblk) {

  3258.     case TT_8X8:

  3259.         pat  = 0xF;

  3260.         i    = 0;

  3261.         last = 0;

  3262.         while (!last) {

  3263.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3264.             i += skip;

  3265.             if (i > 63)

  3266.                 break;

  3267.             if (!v->fcm)

  3268.                 idx = v->zz_8x8[0][i++];

  3269.             else

  3270.                 idx = v->zzi_8x8[i++];

  3271.             block[idx] = value * scale;

  3272.             if (!v->pquantizer)

  3273.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3274.         }

  3275.         if (!skip_block) {

  3276.             if (i == 1)

  3277.                 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);

  3278.             else {

  3279.                 v->vc1dsp.vc1_inv_trans_8x8(block);

  3280.                 s->idsp.add_pixels_clamped(block, dst, linesize);

  3281.             }

  3282.         }

  3283.         break;

  3284.     case TT_4X4:

  3285.         pat = ~subblkpat & 0xF;

  3286.         for (j = 0; j < 4; j++) {

  3287.             last = subblkpat & (1 << (3 - j));

  3288.             i    = 0;

  3289.             off  = (j & 1) * 4 + (j & 2) * 16;

  3290.             while (!last) {

  3291.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3292.                 i += skip;

  3293.                 if (i > 15)

  3294.                     break;

  3295.                 if (!v->fcm)

  3296.                     idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3297.                 else

  3298.                     idx = ff_vc1_adv_interlaced_4x4_zz[i++];

  3299.                 block[idx + off] = value * scale;

  3300.                 if (!v->pquantizer)

  3301.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3302.             }

  3303.             if (!(subblkpat & (1 << (3 - j))) && !skip_block) {

  3304.                 if (i == 1)

  3305.                     v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);

  3306.                 else

  3307.                     v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) *  2 * linesize, linesize, block + off);

  3308.             }

  3309.         }

  3310.         break;

  3311.     case TT_8X4:

  3312.         pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;

  3313.         for (j = 0; j < 2; j++) {

  3314.             last = subblkpat & (1 << (1 - j));

  3315.             i    = 0;

  3316.             off  = j * 32;

  3317.             while (!last) {

  3318.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3319.                 i += skip;

  3320.                 if (i > 31)

  3321.                     break;

  3322.                 if (!v->fcm)

  3323.                     idx = v->zz_8x4[i++] + off;

  3324.                 else

  3325.                     idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;

  3326.                 block[idx] = value * scale;

  3327.                 if (!v->pquantizer)

  3328.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3329.             }

  3330.             if (!(subblkpat & (1 << (1 - j))) && !skip_block) {

  3331.                 if (i == 1)

  3332.                     v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);

  3333.                 else

  3334.                     v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);

  3335.             }

  3336.         }

  3337.         break;

  3338.     case TT_4X8:

  3339.         pat = ~(subblkpat * 5) & 0xF;

  3340.         for (j = 0; j < 2; j++) {

  3341.             last = subblkpat & (1 << (1 - j));

  3342.             i    = 0;

  3343.             off  = j * 4;

  3344.             while (!last) {

  3345.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3346.                 i += skip;

  3347.                 if (i > 31)

  3348.                     break;

  3349.                 if (!v->fcm)

  3350.                     idx = v->zz_4x8[i++] + off;

  3351.                 else

  3352.                     idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;

  3353.                 block[idx] = value * scale;

  3354.                 if (!v->pquantizer)

  3355.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3356.             }

  3357.             if (!(subblkpat & (1 << (1 - j))) && !skip_block) {

  3358.                 if (i == 1)

  3359.                     v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);

  3360.                 else

  3361.                     v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3362.             }

  3363.         }

  3364.         break;

  3365.     }

  3366.     if (ttmb_out)

  3367.         *ttmb_out |= ttblk << (n * 4);

  3368.     return pat;

  3369. }

  3370. 

  3371. /** @} */ // Macroblock group

  3372. 

  3373. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3374. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3375. 

  3376. static av_always_inline void vc1_apply_p_v_loop_filter(VC1Context *v, int block_num)

  3377. {

  3378.     MpegEncContext *s  = &v->s;

  3379.     int mb_cbp         = v->cbp[s->mb_x - s->mb_stride],

  3380.         block_cbp      = mb_cbp      >> (block_num * 4), bottom_cbp,

  3381.         mb_is_intra    = v->is_intra[s->mb_x - s->mb_stride],

  3382.         block_is_intra = mb_is_intra >> (block_num * 4), bottom_is_intra;

  3383.     int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;

  3384.     uint8_t *dst;

  3385. 

  3386.     if (block_num > 3) {

  3387.         dst      = s->dest[block_num - 3];

  3388.     } else {

  3389.         dst      = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 8) * linesize;

  3390.     }

  3391.     if (s->mb_y != s->end_mb_y || block_num < 2) {

  3392.         int16_t (*mv)[2];

  3393.         int mv_stride;

  3394. 

  3395.         if (block_num > 3) {

  3396.             bottom_cbp      = v->cbp[s->mb_x]      >> (block_num * 4);

  3397.             bottom_is_intra = v->is_intra[s->mb_x] >> (block_num * 4);

  3398.             mv              = &v->luma_mv[s->mb_x - s->mb_stride];

  3399.             mv_stride       = s->mb_stride;

  3400.         } else {

  3401.             bottom_cbp      = (block_num < 2) ? (mb_cbp               >> ((block_num + 2) * 4))

  3402.                                               : (v->cbp[s->mb_x]      >> ((block_num - 2) * 4));

  3403.             bottom_is_intra = (block_num < 2) ? (mb_is_intra          >> ((block_num + 2) * 4))

  3404.                                               : (v->is_intra[s->mb_x] >> ((block_num - 2) * 4));

  3405.             mv_stride       = s->b8_stride;

  3406.             mv              = &s->current_picture.motion_val[0][s->block_index[block_num] - 2 * mv_stride];

  3407.         }

  3408. 

  3409.         if (bottom_is_intra & 1 || block_is_intra & 1 ||

  3410.             mv[0][0] != mv[mv_stride][0] || mv[0][1] != mv[mv_stride][1]) {

  3411.             v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3412.         } else {

  3413.             idx = ((bottom_cbp >> 2) | block_cbp) & 3;

  3414.             if (idx == 3) {

  3415.                 v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3416.             } else if (idx) {

  3417.                 if (idx == 1)

  3418.                     v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);

  3419.                 else

  3420.                     v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);

  3421.             }

  3422.         }

  3423.     }

  3424. 

  3425.     dst -= 4 * linesize;

  3426.     ttblk = (v->ttblk[s->mb_x - s->mb_stride] >> (block_num * 4)) & 0xF;

  3427.     if (ttblk == TT_4X4 || ttblk == TT_8X4) {

  3428.         idx = (block_cbp | (block_cbp >> 2)) & 3;

  3429.         if (idx == 3) {

  3430.             v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3431.         } else if (idx) {

  3432.             if (idx == 1)

  3433.                 v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);

  3434.             else

  3435.                 v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);

  3436.         }

  3437.     }

  3438. }

  3439. 

  3440. static av_always_inline void vc1_apply_p_h_loop_filter(VC1Context *v, int block_num)

  3441. {

  3442.     MpegEncContext *s  = &v->s;

  3443.     int mb_cbp         = v->cbp[s->mb_x - 1 - s->mb_stride],

  3444.         block_cbp      = mb_cbp      >> (block_num * 4), right_cbp,

  3445.         mb_is_intra    = v->is_intra[s->mb_x - 1 - s->mb_stride],

  3446.         block_is_intra = mb_is_intra >> (block_num * 4), right_is_intra;

  3447.     int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;

  3448.     uint8_t *dst;

  3449. 

  3450.     if (block_num > 3) {

  3451.         dst = s->dest[block_num - 3] - 8 * linesize;

  3452.     } else {

  3453.         dst = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 16) * linesize - 8;

  3454.     }

  3455. 

  3456.     if (s->mb_x != s->mb_width || !(block_num & 5)) {

  3457.         int16_t (*mv)[2];

  3458. 

  3459.         if (block_num > 3) {

  3460.             right_cbp      = v->cbp[s->mb_x - s->mb_stride] >> (block_num * 4);

  3461.             right_is_intra = v->is_intra[s->mb_x - s->mb_stride] >> (block_num * 4);

  3462.             mv             = &v->luma_mv[s->mb_x - s->mb_stride - 1];

  3463.         } else {

  3464.             right_cbp      = (block_num & 1) ? (v->cbp[s->mb_x - s->mb_stride]      >> ((block_num - 1) * 4))

  3465.                                              : (mb_cbp                              >> ((block_num + 1) * 4));

  3466.             right_is_intra = (block_num & 1) ? (v->is_intra[s->mb_x - s->mb_stride] >> ((block_num - 1) * 4))

  3467.                                              : (mb_is_intra                         >> ((block_num + 1) * 4));

  3468.             mv             = &s->current_picture.motion_val[0][s->block_index[block_num] - s->b8_stride * 2 - 2];

  3469.         }

  3470.         if (block_is_intra & 1 || right_is_intra & 1 || mv[0][0] != mv[1][0] || mv[0][1] != mv[1][1]) {

  3471.             v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3472.         } else {

  3473.             idx = ((right_cbp >> 1) | block_cbp) & 5; // FIXME check

  3474.             if (idx == 5) {

  3475.                 v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3476.             } else if (idx) {

  3477.                 if (idx == 1)

  3478.                     v->vc1dsp.vc1_h_loop_filter4(dst + 4 * linesize, linesize, v->pq);

  3479.                 else

  3480.                     v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);

  3481.             }

  3482.         }

  3483.     }

  3484. 

  3485.     dst -= 4;

  3486.     ttblk = (v->ttblk[s->mb_x - s->mb_stride - 1] >> (block_num * 4)) & 0xf;

  3487.     if (ttblk == TT_4X4 || ttblk == TT_4X8) {

  3488.         idx = (block_cbp | (block_cbp >> 1)) & 5;

  3489.         if (idx == 5) {

  3490.             v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3491.         } else if (idx) {

  3492.             if (idx == 1)

  3493.                 v->vc1dsp.vc1_h_loop_filter4(dst + linesize * 4, linesize, v->pq);

  3494.             else

  3495.                 v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);

  3496.         }

  3497.     }

  3498. }

  3499. 

  3500. static void vc1_apply_p_loop_filter(VC1Context *v)

  3501. {

  3502.     MpegEncContext *s = &v->s;

  3503.     int i;

  3504. 

  3505.     for (i = 0; i < 6; i++) {

  3506.         vc1_apply_p_v_loop_filter(v, i);

  3507.     }

  3508. 

  3509.     /* V always precedes H, therefore we run H one MB before V;

  3510.      * at the end of a row, we catch up to complete the row */

  3511.     if (s->mb_x) {

  3512.         for (i = 0; i < 6; i++) {

  3513.             vc1_apply_p_h_loop_filter(v, i);

  3514.         }

  3515.         if (s->mb_x == s->mb_width - 1) {

  3516.             s->mb_x++;

  3517.             ff_update_block_index(s);

  3518.             for (i = 0; i < 6; i++) {

  3519.                 vc1_apply_p_h_loop_filter(v, i);

  3520.             }

  3521.         }

  3522.     }

  3523. }

  3524. 

  3525. /** Decode one P-frame MB

  3526.  */

  3527. static int vc1_decode_p_mb(VC1Context *v)

  3528. {

  3529.     MpegEncContext *s = &v->s;

  3530.     GetBitContext *gb = &s->gb;

  3531.     int i, j;

  3532.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3533.     int cbp; /* cbp decoding stuff */

  3534.     int mqdiff, mquant; /* MB quantization */

  3535.     int ttmb = v->ttfrm; /* MB Transform type */

  3536. 

  3537.     int mb_has_coeffs = 1; /* last_flag */

  3538.     int dmv_x, dmv_y; /* Differential MV components */

  3539.     int index, index1; /* LUT indexes */

  3540.     int val, sign; /* temp values */

  3541.     int first_block = 1;

  3542.     int dst_idx, off;

  3543.     int skipped, fourmv;

  3544.     int block_cbp = 0, pat, block_tt = 0, block_intra = 0;

  3545. 

  3546.     mquant = v->pq; /* lossy initialization */

  3547. 

  3548.     if (v->mv_type_is_raw)

  3549.         fourmv = get_bits1(gb);

  3550.     else

  3551.         fourmv = v->mv_type_mb_plane[mb_pos];

  3552.     if (v->skip_is_raw)

  3553.         skipped = get_bits1(gb);

  3554.     else

  3555.         skipped = v->s.mbskip_table[mb_pos];

  3556. 

  3557.     if (!fourmv) { /* 1MV mode */

  3558.         if (!skipped) {

  3559.             GET_MVDATA(dmv_x, dmv_y);

  3560. 

  3561.             if (s->mb_intra) {

  3562.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3563.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3564.             }

  3565.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3566.             vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3567. 

  3568.             /* FIXME Set DC val for inter block ? */

  3569.             if (s->mb_intra && !mb_has_coeffs) {

  3570.                 GET_MQUANT();

  3571.                 s->ac_pred = get_bits1(gb);

  3572.                 cbp        = 0;

  3573.             } else if (mb_has_coeffs) {

  3574.                 if (s->mb_intra)

  3575.                     s->ac_pred = get_bits1(gb);

  3576.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3577.                 GET_MQUANT();

  3578.             } else {

  3579.                 mquant = v->pq;

  3580.                 cbp    = 0;

  3581.             }

  3582.             s->current_picture.qscale_table[mb_pos] = mquant;

  3583. 

  3584.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3585.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3586.                                 VC1_TTMB_VLC_BITS, 2);

  3587.             if (!s->mb_intra) vc1_mc_1mv(v, 0);

  3588.             dst_idx = 0;

  3589.             for (i = 0; i < 6; i++) {

  3590.                 s->dc_val[0][s->block_index[i]] = 0;

  3591.                 dst_idx += i >> 2;

  3592.                 val = ((cbp >> (5 - i)) & 1);

  3593.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3594.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3595.                 if (s->mb_intra) {

  3596.                     /* check if prediction blocks A and C are available */

  3597.                     v->a_avail = v->c_avail = 0;

  3598.                     if (i == 2 || i == 3 || !s->first_slice_line)

  3599.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3600.                     if (i == 1 || i == 3 || s->mb_x)

  3601.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3602. 

  3603.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  3604.                                            (i & 4) ? v->codingset2 : v->codingset);

  3605.                     if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  3606.                         continue;

  3607.                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3608.                     if (v->rangeredfrm)

  3609.                         for (j = 0; j < 64; j++)

  3610.                             s->block[i][j] <<= 1;

  3611.                     s->idsp.put_signed_pixels_clamped(s->block[i],

  3612.                                                       s->dest[dst_idx] + off,

  3613.                                                       i & 4 ? s->uvlinesize

  3614.                                                             : s->linesize);

  3615.                     if (v->pq >= 9 && v->overlap) {

  3616.                         if (v->c_avail)

  3617.                             v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3618.                         if (v->a_avail)

  3619.                             v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3620.                     }

  3621.                     block_cbp   |= 0xF << (i << 2);

  3622.                     block_intra |= 1 << i;

  3623.                 } else if (val) {

  3624.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,

  3625.                                              s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,

  3626.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);

  3627.                     block_cbp |= pat << (i << 2);

  3628.                     if (!v->ttmbf && ttmb < 8)

  3629.                         ttmb = -1;

  3630.                     first_block = 0;

  3631.                 }

  3632.             }

  3633.         } else { // skipped

  3634.             s->mb_intra = 0;

  3635.             for (i = 0; i < 6; i++) {

  3636.                 v->mb_type[0][s->block_index[i]] = 0;

  3637.                 s->dc_val[0][s->block_index[i]]  = 0;

  3638.             }

  3639.             s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;

  3640.             s->current_picture.qscale_table[mb_pos] = 0;

  3641.             vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3642.             vc1_mc_1mv(v, 0);

  3643.         }

  3644.     } else { // 4MV mode

  3645.         if (!skipped /* unskipped MB */) {

  3646.             int intra_count = 0, coded_inter = 0;

  3647.             int is_intra[6], is_coded[6];

  3648.             /* Get CBPCY */

  3649.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3650.             for (i = 0; i < 6; i++) {

  3651.                 val = ((cbp >> (5 - i)) & 1);

  3652.                 s->dc_val[0][s->block_index[i]] = 0;

  3653.                 s->mb_intra                     = 0;

  3654.                 if (i < 4) {

  3655.                     dmv_x = dmv_y = 0;

  3656.                     s->mb_intra   = 0;

  3657.                     mb_has_coeffs = 0;

  3658.                     if (val) {

  3659.                         GET_MVDATA(dmv_x, dmv_y);

  3660.                     }

  3661.                     vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3662.                     if (!s->mb_intra)

  3663.                         vc1_mc_4mv_luma(v, i, 0, 0);

  3664.                     intra_count += s->mb_intra;

  3665.                     is_intra[i]  = s->mb_intra;

  3666.                     is_coded[i]  = mb_has_coeffs;

  3667.                 }

  3668.                 if (i & 4) {

  3669.                     is_intra[i] = (intra_count >= 3);

  3670.                     is_coded[i] = val;

  3671.                 }

  3672.                 if (i == 4)

  3673.                     vc1_mc_4mv_chroma(v, 0);

  3674.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3675.                 if (!coded_inter)

  3676.                     coded_inter = !is_intra[i] & is_coded[i];

  3677.             }

  3678.             // if there are no coded blocks then don't do anything more

  3679.             dst_idx = 0;

  3680.             if (!intra_count && !coded_inter)

  3681.                 goto end;

  3682.             GET_MQUANT();

  3683.             s->current_picture.qscale_table[mb_pos] = mquant;

  3684.             /* test if block is intra and has pred */

  3685.             {

  3686.                 int intrapred = 0;

  3687.                 for (i = 0; i < 6; i++)

  3688.                     if (is_intra[i]) {

  3689.                         if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3690.                             || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3691.                             intrapred = 1;

  3692.                             break;

  3693.                         }

  3694.                     }

  3695.                 if (intrapred)

  3696.                     s->ac_pred = get_bits1(gb);

  3697.                 else

  3698.                     s->ac_pred = 0;

  3699.             }

  3700.             if (!v->ttmbf && coded_inter)

  3701.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3702.             for (i = 0; i < 6; i++) {

  3703.                 dst_idx    += i >> 2;

  3704.                 off         = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3705.                 s->mb_intra = is_intra[i];

  3706.                 if (is_intra[i]) {

  3707.                     /* check if prediction blocks A and C are available */

  3708.                     v->a_avail = v->c_avail = 0;

  3709.                     if (i == 2 || i == 3 || !s->first_slice_line)

  3710.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3711.                     if (i == 1 || i == 3 || s->mb_x)

  3712.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3713. 

  3714.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant,

  3715.                                            (i & 4) ? v->codingset2 : v->codingset);

  3716.                     if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  3717.                         continue;

  3718.                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3719.                     if (v->rangeredfrm)

  3720.                         for (j = 0; j < 64; j++)

  3721.                             s->block[i][j] <<= 1;

  3722.                     s->idsp.put_signed_pixels_clamped(s->block[i],

  3723.                                                       s->dest[dst_idx] + off,

  3724.                                                       (i & 4) ? s->uvlinesize

  3725.                                                               : s->linesize);

  3726.                     if (v->pq >= 9 && v->overlap) {

  3727.                         if (v->c_avail)

  3728.                             v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3729.                         if (v->a_avail)

  3730.                             v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3731.                     }

  3732.                     block_cbp   |= 0xF << (i << 2);

  3733.                     block_intra |= 1 << i;

  3734.                 } else if (is_coded[i]) {

  3735.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  3736.                                              first_block, s->dest[dst_idx] + off,

  3737.                                              (i & 4) ? s->uvlinesize : s->linesize,

  3738.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY),

  3739.                                              &block_tt);

  3740.                     block_cbp |= pat << (i << 2);

  3741.                     if (!v->ttmbf && ttmb < 8)

  3742.                         ttmb = -1;

  3743.                     first_block = 0;

  3744.                 }

  3745.             }

  3746.         } else { // skipped MB

  3747.             s->mb_intra                               = 0;

  3748.             s->current_picture.qscale_table[mb_pos] = 0;

  3749.             for (i = 0; i < 6; i++) {

  3750.                 v->mb_type[0][s->block_index[i]] = 0;

  3751.                 s->dc_val[0][s->block_index[i]]  = 0;

  3752.             }

  3753.             for (i = 0; i < 4; i++) {

  3754.                 vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3755.                 vc1_mc_4mv_luma(v, i, 0, 0);

  3756.             }

  3757.             vc1_mc_4mv_chroma(v, 0);

  3758.             s->current_picture.qscale_table[mb_pos] = 0;

  3759.         }

  3760.     }

  3761. end:

  3762.     v->cbp[s->mb_x]      = block_cbp;

  3763.     v->ttblk[s->mb_x]    = block_tt;

  3764.     v->is_intra[s->mb_x] = block_intra;

  3765. 

  3766.     return 0;

  3767. }

  3768. 

  3769. /* Decode one macroblock in an interlaced frame p picture */

  3770. 

  3771. static int vc1_decode_p_mb_intfr(VC1Context *v)

  3772. {

  3773.     MpegEncContext *s = &v->s;

  3774.     GetBitContext *gb = &s->gb;

  3775.     int i;

  3776.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3777.     int cbp = 0; /* cbp decoding stuff */

  3778.     int mqdiff, mquant; /* MB quantization */

  3779.     int ttmb = v->ttfrm; /* MB Transform type */

  3780. 

  3781.     int mb_has_coeffs = 1; /* last_flag */

  3782.     int dmv_x, dmv_y; /* Differential MV components */

  3783.     int val; /* temp value */

  3784.     int first_block = 1;

  3785.     int dst_idx, off;

  3786.     int skipped, fourmv = 0, twomv = 0;

  3787.     int block_cbp = 0, pat, block_tt = 0;

  3788.     int idx_mbmode = 0, mvbp;

  3789.     int stride_y, fieldtx;

  3790. 

  3791.     mquant = v->pq; /* Lossy initialization */

  3792. 

  3793.     if (v->skip_is_raw)

  3794.         skipped = get_bits1(gb);

  3795.     else

  3796.         skipped = v->s.mbskip_table[mb_pos];

  3797.     if (!skipped) {

  3798.         if (v->fourmvswitch)

  3799.             idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done

  3800.         else

  3801.             idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line

  3802.         switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {

  3803.         /* store the motion vector type in a flag (useful later) */

  3804.         case MV_PMODE_INTFR_4MV:

  3805.             fourmv = 1;

  3806.             v->blk_mv_type[s->block_index[0]] = 0;

  3807.             v->blk_mv_type[s->block_index[1]] = 0;

  3808.             v->blk_mv_type[s->block_index[2]] = 0;

  3809.             v->blk_mv_type[s->block_index[3]] = 0;

  3810.             break;

  3811.         case MV_PMODE_INTFR_4MV_FIELD:

  3812.             fourmv = 1;

  3813.             v->blk_mv_type[s->block_index[0]] = 1;

  3814.             v->blk_mv_type[s->block_index[1]] = 1;

  3815.             v->blk_mv_type[s->block_index[2]] = 1;

  3816.             v->blk_mv_type[s->block_index[3]] = 1;

  3817.             break;

  3818.         case MV_PMODE_INTFR_2MV_FIELD:

  3819.             twomv = 1;

  3820.             v->blk_mv_type[s->block_index[0]] = 1;

  3821.             v->blk_mv_type[s->block_index[1]] = 1;

  3822.             v->blk_mv_type[s->block_index[2]] = 1;

  3823.             v->blk_mv_type[s->block_index[3]] = 1;

  3824.             break;

  3825.         case MV_PMODE_INTFR_1MV:

  3826.             v->blk_mv_type[s->block_index[0]] = 0;

  3827.             v->blk_mv_type[s->block_index[1]] = 0;

  3828.             v->blk_mv_type[s->block_index[2]] = 0;

  3829.             v->blk_mv_type[s->block_index[3]] = 0;

  3830.             break;

  3831.         }

  3832.         if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB

  3833.             for (i = 0; i < 4; i++) {

  3834.                 s->current_picture.motion_val[1][s->block_index[i]][0] = 0;

  3835.                 s->current_picture.motion_val[1][s->block_index[i]][1] = 0;

  3836.             }

  3837.             s->current_picture.mb_type[mb_pos]                     = MB_TYPE_INTRA;

  3838.             s->mb_intra = v->is_intra[s->mb_x] = 1;

  3839.             for (i = 0; i < 6; i++)

  3840.                 v->mb_type[0][s->block_index[i]] = 1;

  3841.             fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);

  3842.             mb_has_coeffs = get_bits1(gb);

  3843.             if (mb_has_coeffs)

  3844.                 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3845.             v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);

  3846.             GET_MQUANT();

  3847.             s->current_picture.qscale_table[mb_pos] = mquant;

  3848.             /* Set DC scale - y and c use the same (not sure if necessary here) */

  3849.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3850.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3851.             dst_idx = 0;

  3852.             for (i = 0; i < 6; i++) {

  3853.                 s->dc_val[0][s->block_index[i]] = 0;

  3854.                 dst_idx += i >> 2;

  3855.                 val = ((cbp >> (5 - i)) & 1);

  3856.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3857.                 v->a_avail = v->c_avail = 0;

  3858.                 if (i == 2 || i == 3 || !s->first_slice_line)

  3859.                     v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3860.                 if (i == 1 || i == 3 || s->mb_x)

  3861.                     v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3862. 

  3863.                 vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  3864.                                        (i & 4) ? v->codingset2 : v->codingset);

  3865.                 if ((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3866.                 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3867.                 if (i < 4) {

  3868.                     stride_y = s->linesize << fieldtx;

  3869.                     off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;

  3870.                 } else {

  3871.                     stride_y = s->uvlinesize;

  3872.                     off = 0;

  3873.                 }

  3874.                 s->idsp.put_signed_pixels_clamped(s->block[i],

  3875.                                                   s->dest[dst_idx] + off,

  3876.                                                   stride_y);

  3877.                 //TODO: loop filter

  3878.             }

  3879. 

  3880.         } else { // inter MB

  3881.             mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];

  3882.             if (mb_has_coeffs)

  3883.                 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3884.             if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {

  3885.                 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);

  3886.             } else {

  3887.                 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)

  3888.                     || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {

  3889.                     v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  3890.                 }

  3891.             }

  3892.             s->mb_intra = v->is_intra[s->mb_x] = 0;

  3893.             for (i = 0; i < 6; i++)

  3894.                 v->mb_type[0][s->block_index[i]] = 0;

  3895.             fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];

  3896.             /* for all motion vector read MVDATA and motion compensate each block */

  3897.             dst_idx = 0;

  3898.             if (fourmv) {

  3899.                 mvbp = v->fourmvbp;

  3900.                 for (i = 0; i < 6; i++) {

  3901.                     if (i < 4) {

  3902.                         dmv_x = dmv_y = 0;

  3903.                         val   = ((mvbp >> (3 - i)) & 1);

  3904.                         if (val) {

  3905.                             get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3906.                         }

  3907.                         vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);

  3908.                         vc1_mc_4mv_luma(v, i, 0, 0);

  3909.                     } else if (i == 4) {

  3910.                         vc1_mc_4mv_chroma4(v, 0, 0, 0);

  3911.                     }

  3912.                 }

  3913.             } else if (twomv) {

  3914.                 mvbp  = v->twomvbp;

  3915.                 dmv_x = dmv_y = 0;

  3916.                 if (mvbp & 2) {

  3917.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3918.                 }

  3919.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);

  3920.                 vc1_mc_4mv_luma(v, 0, 0, 0);

  3921.                 vc1_mc_4mv_luma(v, 1, 0, 0);

  3922.                 dmv_x = dmv_y = 0;

  3923.                 if (mvbp & 1) {

  3924.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3925.                 }

  3926.                 vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);

  3927.                 vc1_mc_4mv_luma(v, 2, 0, 0);

  3928.                 vc1_mc_4mv_luma(v, 3, 0, 0);

  3929.                 vc1_mc_4mv_chroma4(v, 0, 0, 0);

  3930.             } else {

  3931.                 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];

  3932.                 dmv_x = dmv_y = 0;

  3933.                 if (mvbp) {

  3934.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3935.                 }

  3936.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);

  3937.                 vc1_mc_1mv(v, 0);

  3938.             }

  3939.             if (cbp)

  3940.                 GET_MQUANT();  // p. 227

  3941.             s->current_picture.qscale_table[mb_pos] = mquant;

  3942.             if (!v->ttmbf && cbp)

  3943.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3944.             for (i = 0; i < 6; i++) {

  3945.                 s->dc_val[0][s->block_index[i]] = 0;

  3946.                 dst_idx += i >> 2;

  3947.                 val = ((cbp >> (5 - i)) & 1);

  3948.                 if (!fieldtx)

  3949.                     off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3950.                 else

  3951.                     off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));

  3952.                 if (val) {

  3953.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  3954.                                              first_block, s->dest[dst_idx] + off,

  3955.                                              (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),

  3956.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);

  3957.                     block_cbp |= pat << (i << 2);

  3958.                     if (!v->ttmbf && ttmb < 8)

  3959.                         ttmb = -1;

  3960.                     first_block = 0;

  3961.                 }

  3962.             }

  3963.         }

  3964.     } else { // skipped

  3965.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  3966.         for (i = 0; i < 6; i++) {

  3967.             v->mb_type[0][s->block_index[i]] = 0;

  3968.             s->dc_val[0][s->block_index[i]] = 0;

  3969.         }

  3970.         s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;

  3971.         s->current_picture.qscale_table[mb_pos] = 0;

  3972.         v->blk_mv_type[s->block_index[0]] = 0;

  3973.         v->blk_mv_type[s->block_index[1]] = 0;

  3974.         v->blk_mv_type[s->block_index[2]] = 0;

  3975.         v->blk_mv_type[s->block_index[3]] = 0;

  3976.         vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);

  3977.         vc1_mc_1mv(v, 0);

  3978.     }

  3979.     if (s->mb_x == s->mb_width - 1)

  3980.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0])*s->mb_stride);

  3981.     return 0;

  3982. }

  3983. 

  3984. static int vc1_decode_p_mb_intfi(VC1Context *v)

  3985. {

  3986.     MpegEncContext *s = &v->s;

  3987.     GetBitContext *gb = &s->gb;

  3988.     int i;

  3989.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3990.     int cbp = 0; /* cbp decoding stuff */

  3991.     int mqdiff, mquant; /* MB quantization */

  3992.     int ttmb = v->ttfrm; /* MB Transform type */

  3993. 

  3994.     int mb_has_coeffs = 1; /* last_flag */

  3995.     int dmv_x, dmv_y; /* Differential MV components */

  3996.     int val; /* temp values */

  3997.     int first_block = 1;

  3998.     int dst_idx, off;

  3999.     int pred_flag = 0;

  4000.     int block_cbp = 0, pat, block_tt = 0;

  4001.     int idx_mbmode = 0;

  4002. 

  4003.     mquant = v->pq; /* Lossy initialization */

  4004. 

  4005.     idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);

  4006.     if (idx_mbmode <= 1) { // intra MB

  4007.         s->mb_intra = v->is_intra[s->mb_x] = 1;

  4008.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  4009.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  4010.         s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;

  4011.         GET_MQUANT();

  4012.         s->current_picture.qscale_table[mb_pos] = mquant;

  4013.         /* Set DC scale - y and c use the same (not sure if necessary here) */

  4014.         s->y_dc_scale = s->y_dc_scale_table[mquant];

  4015.         s->c_dc_scale = s->c_dc_scale_table[mquant];

  4016.         v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);

  4017.         mb_has_coeffs = idx_mbmode & 1;

  4018.         if (mb_has_coeffs)

  4019.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);

  4020.         dst_idx = 0;

  4021.         for (i = 0; i < 6; i++) {

  4022.             s->dc_val[0][s->block_index[i]]  = 0;

  4023.             v->mb_type[0][s->block_index[i]] = 1;

  4024.             dst_idx += i >> 2;

  4025.             val = ((cbp >> (5 - i)) & 1);

  4026.             v->a_avail = v->c_avail = 0;

  4027.             if (i == 2 || i == 3 || !s->first_slice_line)

  4028.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4029.             if (i == 1 || i == 3 || s->mb_x)

  4030.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4031. 

  4032.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4033.                                    (i & 4) ? v->codingset2 : v->codingset);

  4034.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4035.                 continue;

  4036.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4037.             off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4038.             s->idsp.put_signed_pixels_clamped(s->block[i],

  4039.                                               s->dest[dst_idx] + off,

  4040.                                               (i & 4) ? s->uvlinesize

  4041.                                                       : s->linesize);

  4042.             // TODO: loop filter

  4043.         }

  4044.     } else {

  4045.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  4046.         s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;

  4047.         for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;

  4048.         if (idx_mbmode <= 5) { // 1-MV

  4049.             dmv_x = dmv_y = pred_flag = 0;

  4050.             if (idx_mbmode & 1) {

  4051.                 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);

  4052.             }

  4053.             vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);

  4054.             vc1_mc_1mv(v, 0);

  4055.             mb_has_coeffs = !(idx_mbmode & 2);

  4056.         } else { // 4-MV

  4057.             v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  4058.             for (i = 0; i < 6; i++) {

  4059.                 if (i < 4) {

  4060.                     dmv_x = dmv_y = pred_flag = 0;

  4061.                     val   = ((v->fourmvbp >> (3 - i)) & 1);

  4062.                     if (val) {

  4063.                         get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);

  4064.                     }

  4065.                     vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);

  4066.                     vc1_mc_4mv_luma(v, i, 0, 0);

  4067.                 } else if (i == 4)

  4068.                     vc1_mc_4mv_chroma(v, 0);

  4069.             }

  4070.             mb_has_coeffs = idx_mbmode & 1;

  4071.         }

  4072.         if (mb_has_coeffs)

  4073.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4074.         if (cbp) {

  4075.             GET_MQUANT();

  4076.         }

  4077.         s->current_picture.qscale_table[mb_pos] = mquant;

  4078.         if (!v->ttmbf && cbp) {

  4079.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4080.         }

  4081.         dst_idx = 0;

  4082.         for (i = 0; i < 6; i++) {

  4083.             s->dc_val[0][s->block_index[i]] = 0;

  4084.             dst_idx += i >> 2;

  4085.             val = ((cbp >> (5 - i)) & 1);

  4086.             off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;

  4087.             if (val) {

  4088.                 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4089.                                          first_block, s->dest[dst_idx] + off,

  4090.                                          (i & 4) ? s->uvlinesize : s->linesize,

  4091.                                          (i & 4) && (s->flags & CODEC_FLAG_GRAY),

  4092.                                          &block_tt);

  4093.                 block_cbp |= pat << (i << 2);

  4094.                 if (!v->ttmbf && ttmb < 8) ttmb = -1;

  4095.                 first_block = 0;

  4096.             }

  4097.         }

  4098.     }

  4099.     if (s->mb_x == s->mb_width - 1)

  4100.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);

  4101.     return 0;

  4102. }

  4103. 

  4104. /** Decode one B-frame MB (in Main profile)

  4105.  */

  4106. static void vc1_decode_b_mb(VC1Context *v)

  4107. {

  4108.     MpegEncContext *s = &v->s;

  4109.     GetBitContext *gb = &s->gb;

  4110.     int i, j;

  4111.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4112.     int cbp = 0; /* cbp decoding stuff */

  4113.     int mqdiff, mquant; /* MB quantization */

  4114.     int ttmb = v->ttfrm; /* MB Transform type */

  4115.     int mb_has_coeffs = 0; /* last_flag */

  4116.     int index, index1; /* LUT indexes */

  4117.     int val, sign; /* temp values */

  4118.     int first_block = 1;

  4119.     int dst_idx, off;

  4120.     int skipped, direct;

  4121.     int dmv_x[2], dmv_y[2];

  4122.     int bmvtype = BMV_TYPE_BACKWARD;

  4123. 

  4124.     mquant      = v->pq; /* lossy initialization */

  4125.     s->mb_intra = 0;

  4126. 

  4127.     if (v->dmb_is_raw)

  4128.         direct = get_bits1(gb);

  4129.     else

  4130.         direct = v->direct_mb_plane[mb_pos];

  4131.     if (v->skip_is_raw)

  4132.         skipped = get_bits1(gb);

  4133.     else

  4134.         skipped = v->s.mbskip_table[mb_pos];

  4135. 

  4136.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  4137.     for (i = 0; i < 6; i++) {

  4138.         v->mb_type[0][s->block_index[i]] = 0;

  4139.         s->dc_val[0][s->block_index[i]]  = 0;

  4140.     }

  4141.     s->current_picture.qscale_table[mb_pos] = 0;

  4142. 

  4143.     if (!direct) {

  4144.         if (!skipped) {

  4145.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  4146.             dmv_x[1] = dmv_x[0];

  4147.             dmv_y[1] = dmv_y[0];

  4148.         }

  4149.         if (skipped || !s->mb_intra) {

  4150.             bmvtype = decode012(gb);

  4151.             switch (bmvtype) {

  4152.             case 0:

  4153.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  4154.                 break;

  4155.             case 1:

  4156.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  4157.                 break;

  4158.             case 2:

  4159.                 bmvtype  = BMV_TYPE_INTERPOLATED;

  4160.                 dmv_x[0] = dmv_y[0] = 0;

  4161.             }

  4162.         }

  4163.     }

  4164.     for (i = 0; i < 6; i++)

  4165.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4166. 

  4167.     if (skipped) {

  4168.         if (direct)

  4169.             bmvtype = BMV_TYPE_INTERPOLATED;

  4170.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4171.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4172.         return;

  4173.     }

  4174.     if (direct) {

  4175.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4176.         GET_MQUANT();

  4177.         s->mb_intra = 0;

  4178.         s->current_picture.qscale_table[mb_pos] = mquant;

  4179.         if (!v->ttmbf)

  4180.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4181.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  4182.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4183.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4184.     } else {

  4185.         if (!mb_has_coeffs && !s->mb_intra) {

  4186.             /* no coded blocks - effectively skipped */

  4187.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4188.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4189.             return;

  4190.         }

  4191.         if (s->mb_intra && !mb_has_coeffs) {

  4192.             GET_MQUANT();

  4193.             s->current_picture.qscale_table[mb_pos] = mquant;

  4194.             s->ac_pred = get_bits1(gb);

  4195.             cbp = 0;

  4196.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4197.         } else {

  4198.             if (bmvtype == BMV_TYPE_INTERPOLATED) {

  4199.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  4200.                 if (!mb_has_coeffs) {

  4201.                     /* interpolated skipped block */

  4202.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4203.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4204.                     return;

  4205.                 }

  4206.             }

  4207.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4208.             if (!s->mb_intra) {

  4209.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4210.             }

  4211.             if (s->mb_intra)

  4212.                 s->ac_pred = get_bits1(gb);

  4213.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4214.             GET_MQUANT();

  4215.             s->current_picture.qscale_table[mb_pos] = mquant;

  4216.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  4217.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4218.         }

  4219.     }

  4220.     dst_idx = 0;

  4221.     for (i = 0; i < 6; i++) {

  4222.         s->dc_val[0][s->block_index[i]] = 0;

  4223.         dst_idx += i >> 2;

  4224.         val = ((cbp >> (5 - i)) & 1);

  4225.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4226.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4227.         if (s->mb_intra) {

  4228.             /* check if prediction blocks A and C are available */

  4229.             v->a_avail = v->c_avail = 0;

  4230.             if (i == 2 || i == 3 || !s->first_slice_line)

  4231.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4232.             if (i == 1 || i == 3 || s->mb_x)

  4233.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4234. 

  4235.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4236.                                    (i & 4) ? v->codingset2 : v->codingset);

  4237.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4238.                 continue;

  4239.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4240.             if (v->rangeredfrm)

  4241.                 for (j = 0; j < 64; j++)

  4242.                     s->block[i][j] <<= 1;

  4243.             s->idsp.put_signed_pixels_clamped(s->block[i],

  4244.                                               s->dest[dst_idx] + off,

  4245.                                               i & 4 ? s->uvlinesize

  4246.                                                     : s->linesize);

  4247.         } else if (val) {

  4248.             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4249.                                first_block, s->dest[dst_idx] + off,

  4250.                                (i & 4) ? s->uvlinesize : s->linesize,

  4251.                                (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);

  4252.             if (!v->ttmbf && ttmb < 8)

  4253.                 ttmb = -1;

  4254.             first_block = 0;

  4255.         }

  4256.     }

  4257. }

  4258. 

  4259. /** Decode one B-frame MB (in interlaced field B picture)

  4260.  */

  4261. static void vc1_decode_b_mb_intfi(VC1Context *v)

  4262. {

  4263.     MpegEncContext *s = &v->s;

  4264.     GetBitContext *gb = &s->gb;

  4265.     int i, j;

  4266.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4267.     int cbp = 0; /* cbp decoding stuff */

  4268.     int mqdiff, mquant; /* MB quantization */

  4269.     int ttmb = v->ttfrm; /* MB Transform type */

  4270.     int mb_has_coeffs = 0; /* last_flag */

  4271.     int val; /* temp value */

  4272.     int first_block = 1;

  4273.     int dst_idx, off;

  4274.     int fwd;

  4275.     int dmv_x[2], dmv_y[2], pred_flag[2];

  4276.     int bmvtype = BMV_TYPE_BACKWARD;

  4277.     int idx_mbmode;

  4278. 

  4279.     mquant      = v->pq; /* Lossy initialization */

  4280.     s->mb_intra = 0;

  4281. 

  4282.     idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);

  4283.     if (idx_mbmode <= 1) { // intra MB

  4284.         s->mb_intra = v->is_intra[s->mb_x] = 1;

  4285.         s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  4286.         s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  4287.         s->current_picture.mb_type[mb_pos + v->mb_off]         = MB_TYPE_INTRA;

  4288.         GET_MQUANT();

  4289.         s->current_picture.qscale_table[mb_pos] = mquant;

  4290.         /* Set DC scale - y and c use the same (not sure if necessary here) */

  4291.         s->y_dc_scale = s->y_dc_scale_table[mquant];

  4292.         s->c_dc_scale = s->c_dc_scale_table[mquant];

  4293.         v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);

  4294.         mb_has_coeffs = idx_mbmode & 1;

  4295.         if (mb_has_coeffs)

  4296.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);

  4297.         dst_idx = 0;

  4298.         for (i = 0; i < 6; i++) {

  4299.             s->dc_val[0][s->block_index[i]] = 0;

  4300.             dst_idx += i >> 2;

  4301.             val = ((cbp >> (5 - i)) & 1);

  4302.             v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4303.             v->a_avail                       = v->c_avail = 0;

  4304.             if (i == 2 || i == 3 || !s->first_slice_line)

  4305.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4306.             if (i == 1 || i == 3 || s->mb_x)

  4307.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4308. 

  4309.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4310.                                    (i & 4) ? v->codingset2 : v->codingset);

  4311.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4312.                 continue;

  4313.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4314.             if (v->rangeredfrm)

  4315.                 for (j = 0; j < 64; j++)

  4316.                     s->block[i][j] <<= 1;

  4317.             off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4318.             s->idsp.put_signed_pixels_clamped(s->block[i],

  4319.                                               s->dest[dst_idx] + off,

  4320.                                               (i & 4) ? s->uvlinesize

  4321.                                                       : s->linesize);

  4322.             // TODO: yet to perform loop filter

  4323.         }

  4324.     } else {

  4325.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  4326.         s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;

  4327.         for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;

  4328.         if (v->fmb_is_raw)

  4329.             fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);

  4330.         else

  4331.             fwd = v->forward_mb_plane[mb_pos];

  4332.         if (idx_mbmode <= 5) { // 1-MV

  4333.             int interpmvp = 0;

  4334.             dmv_x[0]     = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  4335.             pred_flag[0] = pred_flag[1] = 0;

  4336.             if (fwd)

  4337.                 bmvtype = BMV_TYPE_FORWARD;

  4338.             else {

  4339.                 bmvtype = decode012(gb);

  4340.                 switch (bmvtype) {

  4341.                 case 0:

  4342.                     bmvtype = BMV_TYPE_BACKWARD;

  4343.                     break;

  4344.                 case 1:

  4345.                     bmvtype = BMV_TYPE_DIRECT;

  4346.                     break;

  4347.                 case 2:

  4348.                     bmvtype   = BMV_TYPE_INTERPOLATED;

  4349.                     interpmvp = get_bits1(gb);

  4350.                 }

  4351.             }

  4352.             v->bmvtype = bmvtype;

  4353.             if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {

  4354.                 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);

  4355.             }

  4356.             if (interpmvp) {

  4357.                 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);

  4358.             }

  4359.             if (bmvtype == BMV_TYPE_DIRECT) {

  4360.                 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;

  4361.                 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;

  4362.                 if (!s->next_picture_ptr->field_picture) {

  4363.                     av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");

  4364.                     return;

  4365.                 }

  4366.             }

  4367.             vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);

  4368.             vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);

  4369.             mb_has_coeffs = !(idx_mbmode & 2);

  4370.         } else { // 4-MV

  4371.             if (fwd)

  4372.                 bmvtype = BMV_TYPE_FORWARD;

  4373.             v->bmvtype  = bmvtype;

  4374.             v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  4375.             for (i = 0; i < 6; i++) {

  4376.                 if (i < 4) {

  4377.                     dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;

  4378.                     dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;

  4379.                     val = ((v->fourmvbp >> (3 - i)) & 1);

  4380.                     if (val) {

  4381.                         get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],

  4382.                                                  &dmv_y[bmvtype == BMV_TYPE_BACKWARD],

  4383.                                              &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);

  4384.                     }

  4385.                     vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);

  4386.                     vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);

  4387.                 } else if (i == 4)

  4388.                     vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);

  4389.             }

  4390.             mb_has_coeffs = idx_mbmode & 1;

  4391.         }

  4392.         if (mb_has_coeffs)

  4393.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4394.         if (cbp) {

  4395.             GET_MQUANT();

  4396.         }

  4397.         s->current_picture.qscale_table[mb_pos] = mquant;

  4398.         if (!v->ttmbf && cbp) {

  4399.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4400.         }

  4401.         dst_idx = 0;

  4402.         for (i = 0; i < 6; i++) {

  4403.             s->dc_val[0][s->block_index[i]] = 0;

  4404.             dst_idx += i >> 2;

  4405.             val = ((cbp >> (5 - i)) & 1);

  4406.             off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;

  4407.             if (val) {

  4408.                 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4409.                                    first_block, s->dest[dst_idx] + off,

  4410.                                    (i & 4) ? s->uvlinesize : s->linesize,

  4411.                                    (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);

  4412.                 if (!v->ttmbf && ttmb < 8)

  4413.                     ttmb = -1;

  4414.                 first_block = 0;

  4415.             }

  4416.         }

  4417.     }

  4418. }

  4419. 

  4420. /** Decode one B-frame MB (in interlaced frame B picture)

  4421.  */

  4422. static int vc1_decode_b_mb_intfr(VC1Context *v)

  4423. {

  4424.     MpegEncContext *s = &v->s;

  4425.     GetBitContext *gb = &s->gb;

  4426.     int i, j;

  4427.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4428.     int cbp = 0; /* cbp decoding stuff */

  4429.     int mqdiff, mquant; /* MB quantization */

  4430.     int ttmb = v->ttfrm; /* MB Transform type */

  4431.     int mvsw = 0; /* motion vector switch */

  4432.     int mb_has_coeffs = 1; /* last_flag */

  4433.     int dmv_x, dmv_y; /* Differential MV components */

  4434.     int val; /* temp value */

  4435.     int first_block = 1;

  4436.     int dst_idx, off;

  4437.     int skipped, direct, twomv = 0;

  4438.     int block_cbp = 0, pat, block_tt = 0;

  4439.     int idx_mbmode = 0, mvbp;

  4440.     int stride_y, fieldtx;

  4441.     int bmvtype = BMV_TYPE_BACKWARD;

  4442.     int dir, dir2;

  4443. 

  4444.     mquant = v->pq; /* Lossy initialization */

  4445.     s->mb_intra = 0;

  4446.     if (v->skip_is_raw)

  4447.         skipped = get_bits1(gb);

  4448.     else

  4449.         skipped = v->s.mbskip_table[mb_pos];

  4450. 

  4451.     if (!skipped) {

  4452.         idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);

  4453.         if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {

  4454.             twomv = 1;

  4455.             v->blk_mv_type[s->block_index[0]] = 1;

  4456.             v->blk_mv_type[s->block_index[1]] = 1;

  4457.             v->blk_mv_type[s->block_index[2]] = 1;

  4458.             v->blk_mv_type[s->block_index[3]] = 1;

  4459.         } else {

  4460.             v->blk_mv_type[s->block_index[0]] = 0;

  4461.             v->blk_mv_type[s->block_index[1]] = 0;

  4462.             v->blk_mv_type[s->block_index[2]] = 0;

  4463.             v->blk_mv_type[s->block_index[3]] = 0;

  4464.         }

  4465.     }

  4466. 

  4467.     if (v->dmb_is_raw)

  4468.         direct = get_bits1(gb);

  4469.     else

  4470.         direct = v->direct_mb_plane[mb_pos];

  4471. 

  4472.     if (direct) {

  4473.         if (s->next_picture_ptr->field_picture)

  4474.             av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");

  4475.         s->mv[0][0][0] = s->current_picture.motion_val[0][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 0, s->quarter_sample);

  4476.         s->mv[0][0][1] = s->current_picture.motion_val[0][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 0, s->quarter_sample);

  4477.         s->mv[1][0][0] = s->current_picture.motion_val[1][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 1, s->quarter_sample);

  4478.         s->mv[1][0][1] = s->current_picture.motion_val[1][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 1, s->quarter_sample);

  4479. 

  4480.         if (twomv) {

  4481.             s->mv[0][2][0] = s->current_picture.motion_val[0][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 0, s->quarter_sample);

  4482.             s->mv[0][2][1] = s->current_picture.motion_val[0][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 0, s->quarter_sample);

  4483.             s->mv[1][2][0] = s->current_picture.motion_val[1][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 1, s->quarter_sample);

  4484.             s->mv[1][2][1] = s->current_picture.motion_val[1][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 1, s->quarter_sample);

  4485. 

  4486.             for (i = 1; i < 4; i += 2) {

  4487.                 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];

  4488.                 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];

  4489.                 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];

  4490.                 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];

  4491.             }

  4492.         } else {

  4493.             for (i = 1; i < 4; i++) {

  4494.                 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];

  4495.                 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];

  4496.                 s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];

  4497.                 s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];

  4498.             }

  4499.         }

  4500.     }

  4501. 

  4502.     if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB

  4503.         for (i = 0; i < 4; i++) {

  4504.             s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;

  4505.             s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;

  4506.             s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;

  4507.             s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;

  4508.         }

  4509.         s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  4510.         s->mb_intra = v->is_intra[s->mb_x] = 1;

  4511.         for (i = 0; i < 6; i++)

  4512.             v->mb_type[0][s->block_index[i]] = 1;

  4513.         fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);

  4514.         mb_has_coeffs = get_bits1(gb);

  4515.         if (mb_has_coeffs)

  4516.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4517.         v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);

  4518.         GET_MQUANT();

  4519.         s->current_picture.qscale_table[mb_pos] = mquant;

  4520.         /* Set DC scale - y and c use the same (not sure if necessary here) */

  4521.         s->y_dc_scale = s->y_dc_scale_table[mquant];

  4522.         s->c_dc_scale = s->c_dc_scale_table[mquant];

  4523.         dst_idx = 0;

  4524.         for (i = 0; i < 6; i++) {

  4525.             s->dc_val[0][s->block_index[i]] = 0;

  4526.             dst_idx += i >> 2;

  4527.             val = ((cbp >> (5 - i)) & 1);

  4528.             v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4529.             v->a_avail = v->c_avail = 0;

  4530.             if (i == 2 || i == 3 || !s->first_slice_line)

  4531.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4532.             if (i == 1 || i == 3 || s->mb_x)

  4533.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4534. 

  4535.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4536.                                    (i & 4) ? v->codingset2 : v->codingset);

  4537.             if (i > 3 && (s->flags & CODEC_FLAG_GRAY))

  4538.                 continue;

  4539.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4540.             if (i < 4) {

  4541.                 stride_y = s->linesize << fieldtx;

  4542.                 off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;

  4543.             } else {

  4544.                 stride_y = s->uvlinesize;

  4545.                 off = 0;

  4546.             }

  4547.             s->idsp.put_signed_pixels_clamped(s->block[i],

  4548.                                               s->dest[dst_idx] + off,

  4549.                                               stride_y);

  4550.         }

  4551.     } else {

  4552.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  4553.         if (!direct) {

  4554.             if (skipped || !s->mb_intra) {

  4555.                 bmvtype = decode012(gb);

  4556.                 switch (bmvtype) {

  4557.                 case 0:

  4558.                     bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  4559.                     break;

  4560.                 case 1:

  4561.                     bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  4562.                     break;

  4563.                 case 2:

  4564.                     bmvtype  = BMV_TYPE_INTERPOLATED;

  4565.                 }

  4566.             }

  4567. 

  4568.             if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)

  4569.                 mvsw = get_bits1(gb);

  4570.         }

  4571. 

  4572.         if (!skipped) { // inter MB

  4573.             mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];

  4574.             if (mb_has_coeffs)

  4575.                 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4576.             if (!direct) {

  4577.                 if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {

  4578.                     v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  4579.                 } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {

  4580.                     v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);

  4581.                 }

  4582.             }

  4583. 

  4584.             for (i = 0; i < 6; i++)

  4585.                 v->mb_type[0][s->block_index[i]] = 0;

  4586.             fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];

  4587.             /* for all motion vector read MVDATA and motion compensate each block */

  4588.             dst_idx = 0;

  4589.             if (direct) {

  4590.                 if (twomv) {

  4591.                     for (i = 0; i < 4; i++) {

  4592.                         vc1_mc_4mv_luma(v, i, 0, 0);

  4593.                         vc1_mc_4mv_luma(v, i, 1, 1);

  4594.                     }

  4595.                     vc1_mc_4mv_chroma4(v, 0, 0, 0);

  4596.                     vc1_mc_4mv_chroma4(v, 1, 1, 1);

  4597.                 } else {

  4598.                     vc1_mc_1mv(v, 0);

  4599.                     vc1_interp_mc(v);

  4600.                 }

  4601.             } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {

  4602.                 mvbp = v->fourmvbp;

  4603.                 for (i = 0; i < 4; i++) {

  4604.                     dir = i==1 || i==3;

  4605.                     dmv_x = dmv_y = 0;

  4606.                     val = ((mvbp >> (3 - i)) & 1);

  4607.                     if (val)

  4608.                         get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  4609.                     j = i > 1 ? 2 : 0;

  4610.                     vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);

  4611.                     vc1_mc_4mv_luma(v, j, dir, dir);

  4612.                     vc1_mc_4mv_luma(v, j+1, dir, dir);

  4613.                 }

  4614. 

  4615.                 vc1_mc_4mv_chroma4(v, 0, 0, 0);

  4616.                 vc1_mc_4mv_chroma4(v, 1, 1, 1);

  4617.             } else if (bmvtype == BMV_TYPE_INTERPOLATED) {

  4618.                 mvbp = v->twomvbp;

  4619.                 dmv_x = dmv_y = 0;

  4620.                 if (mvbp & 2)

  4621.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  4622. 

  4623.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);

  4624.                 vc1_mc_1mv(v, 0);

  4625. 

  4626.                 dmv_x = dmv_y = 0;

  4627.                 if (mvbp & 1)

  4628.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  4629. 

  4630.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);

  4631.                 vc1_interp_mc(v);

  4632.             } else if (twomv) {

  4633.                 dir = bmvtype == BMV_TYPE_BACKWARD;

  4634.                 dir2 = dir;

  4635.                 if (mvsw)

  4636.                     dir2 = !dir;

  4637.                 mvbp = v->twomvbp;

  4638.                 dmv_x = dmv_y = 0;

  4639.                 if (mvbp & 2)

  4640.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  4641.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);

  4642. 

  4643.                 dmv_x = dmv_y = 0;

  4644.                 if (mvbp & 1)

  4645.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  4646.                 vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);

  4647. 

  4648.                 if (mvsw) {

  4649.                     for (i = 0; i < 2; i++) {

  4650.                         s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];

  4651.                         s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];

  4652.                         s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];

  4653.                         s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];

  4654.                     }

  4655.                 } else {

  4656.                     vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);

  4657.                     vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);

  4658.                 }

  4659. 

  4660.                 vc1_mc_4mv_luma(v, 0, dir, 0);

  4661.                 vc1_mc_4mv_luma(v, 1, dir, 0);

  4662.                 vc1_mc_4mv_luma(v, 2, dir2, 0);

  4663.                 vc1_mc_4mv_luma(v, 3, dir2, 0);

  4664.                 vc1_mc_4mv_chroma4(v, dir, dir2, 0);

  4665.             } else {

  4666.                 dir = bmvtype == BMV_TYPE_BACKWARD;

  4667. 

  4668.                 mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];

  4669.                 dmv_x = dmv_y = 0;

  4670.                 if (mvbp)

  4671.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  4672. 

  4673.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);

  4674.                 v->blk_mv_type[s->block_index[0]] = 1;

  4675.                 v->blk_mv_type[s->block_index[1]] = 1;

  4676.                 v->blk_mv_type[s->block_index[2]] = 1;

  4677.                 v->blk_mv_type[s->block_index[3]] = 1;

  4678.                 vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);

  4679.                 for (i = 0; i < 2; i++) {

  4680.                     s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];

  4681.                     s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];

  4682.                 }

  4683.                 vc1_mc_1mv(v, dir);

  4684.             }

  4685. 

  4686.             if (cbp)

  4687.                 GET_MQUANT();  // p. 227

  4688.             s->current_picture.qscale_table[mb_pos] = mquant;

  4689.             if (!v->ttmbf && cbp)

  4690.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4691.             for (i = 0; i < 6; i++) {

  4692.                 s->dc_val[0][s->block_index[i]] = 0;

  4693.                 dst_idx += i >> 2;

  4694.                 val = ((cbp >> (5 - i)) & 1);

  4695.                 if (!fieldtx)

  4696.                     off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4697.                 else

  4698.                     off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));

  4699.                 if (val) {

  4700.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4701.                                              first_block, s->dest[dst_idx] + off,

  4702.                                              (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),

  4703.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);

  4704.                     block_cbp |= pat << (i << 2);

  4705.                     if (!v->ttmbf && ttmb < 8)

  4706.                         ttmb = -1;

  4707.                     first_block = 0;

  4708.                 }

  4709.             }

  4710. 

  4711.         } else { // skipped

  4712.             dir = 0;

  4713.             for (i = 0; i < 6; i++) {

  4714.                 v->mb_type[0][s->block_index[i]] = 0;

  4715.                 s->dc_val[0][s->block_index[i]] = 0;

  4716.             }

  4717.             s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;

  4718.             s->current_picture.qscale_table[mb_pos] = 0;

  4719.             v->blk_mv_type[s->block_index[0]] = 0;

  4720.             v->blk_mv_type[s->block_index[1]] = 0;

  4721.             v->blk_mv_type[s->block_index[2]] = 0;

  4722.             v->blk_mv_type[s->block_index[3]] = 0;

  4723. 

  4724.             if (!direct) {

  4725.                 if (bmvtype == BMV_TYPE_INTERPOLATED) {

  4726.                     vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);

  4727.                     vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);

  4728.                 } else {

  4729.                     dir = bmvtype == BMV_TYPE_BACKWARD;

  4730.                     vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);

  4731.                     if (mvsw) {

  4732.                         int dir2 = dir;

  4733.                         if (mvsw)

  4734.                             dir2 = !dir;

  4735.                         for (i = 0; i < 2; i++) {

  4736.                             s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];

  4737.                             s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];

  4738.                             s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];

  4739.                             s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];

  4740.                         }

  4741.                     } else {

  4742.                         v->blk_mv_type[s->block_index[0]] = 1;

  4743.                         v->blk_mv_type[s->block_index[1]] = 1;

  4744.                         v->blk_mv_type[s->block_index[2]] = 1;

  4745.                         v->blk_mv_type[s->block_index[3]] = 1;

  4746.                         vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);

  4747.                         for (i = 0; i < 2; i++) {

  4748.                             s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];

  4749.                             s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];

  4750.                         }

  4751.                     }

  4752.                 }

  4753.             }

  4754. 

  4755.             vc1_mc_1mv(v, dir);

  4756.             if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {

  4757.                 vc1_interp_mc(v);

  4758.             }

  4759.         }

  4760.     }

  4761.     if (s->mb_x == s->mb_width - 1)

  4762.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);

  4763.     v->cbp[s->mb_x]      = block_cbp;

  4764.     v->ttblk[s->mb_x]    = block_tt;

  4765.     return 0;

  4766. }

  4767. 

  4768. /** Decode blocks of I-frame

  4769.  */

  4770. static void vc1_decode_i_blocks(VC1Context *v)

  4771. {

  4772.     int k, j;

  4773.     MpegEncContext *s = &v->s;

  4774.     int cbp, val;

  4775.     uint8_t *coded_val;

  4776.     int mb_pos;

  4777. 

  4778.     /* select codingmode used for VLC tables selection */

  4779.     switch (v->y_ac_table_index) {

  4780.     case 0:

  4781.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4782.         break;

  4783.     case 1:

  4784.         v->codingset = CS_HIGH_MOT_INTRA;

  4785.         break;

  4786.     case 2:

  4787.         v->codingset = CS_MID_RATE_INTRA;

  4788.         break;

  4789.     }

  4790. 

  4791.     switch (v->c_ac_table_index) {

  4792.     case 0:

  4793.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4794.         break;

  4795.     case 1:

  4796.         v->codingset2 = CS_HIGH_MOT_INTER;

  4797.         break;

  4798.     case 2:

  4799.         v->codingset2 = CS_MID_RATE_INTER;

  4800.         break;

  4801.     }

  4802. 

  4803.     /* Set DC scale - y and c use the same */

  4804.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  4805.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  4806. 

  4807.     //do frame decode

  4808.     s->mb_x = s->mb_y = 0;

  4809.     s->mb_intra         = 1;

  4810.     s->first_slice_line = 1;

  4811.     for (s->mb_y = 0; s->mb_y < s->end_mb_y; s->mb_y++) {

  4812.         s->mb_x = 0;

  4813.         init_block_index(v);

  4814.         for (; s->mb_x < v->end_mb_x; s->mb_x++) {

  4815.             uint8_t *dst[6];

  4816.             ff_update_block_index(s);

  4817.             dst[0] = s->dest[0];

  4818.             dst[1] = dst[0] + 8;

  4819.             dst[2] = s->dest[0] + s->linesize * 8;

  4820.             dst[3] = dst[2] + 8;

  4821.             dst[4] = s->dest[1];

  4822.             dst[5] = s->dest[2];

  4823.             s->bdsp.clear_blocks(s->block[0]);

  4824.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  4825.             s->current_picture.mb_type[mb_pos]                     = MB_TYPE_INTRA;

  4826.             s->current_picture.qscale_table[mb_pos]                = v->pq;

  4827.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  4828.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  4829. 

  4830.             // do actual MB decoding and displaying

  4831.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  4832.             v->s.ac_pred = get_bits1(&v->s.gb);

  4833. 

  4834.             for (k = 0; k < 6; k++) {

  4835.                 val = ((cbp >> (5 - k)) & 1);

  4836. 

  4837.                 if (k < 4) {

  4838.                     int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);

  4839.                     val        = val ^ pred;

  4840.                     *coded_val = val;

  4841.                 }

  4842.                 cbp |= val << (5 - k);

  4843. 

  4844.                 vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);

  4845. 

  4846.                 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))

  4847.                     continue;

  4848.                 v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);

  4849.                 if (v->pq >= 9 && v->overlap) {

  4850.                     if (v->rangeredfrm)

  4851.                         for (j = 0; j < 64; j++)

  4852.                             s->block[k][j] <<= 1;

  4853.                     s->idsp.put_signed_pixels_clamped(s->block[k], dst[k],

  4854.                                                       k & 4 ? s->uvlinesize

  4855.                                                             : s->linesize);

  4856.                 } else {

  4857.                     if (v->rangeredfrm)

  4858.                         for (j = 0; j < 64; j++)

  4859.                             s->block[k][j] = (s->block[k][j] - 64) << 1;

  4860.                     s->idsp.put_pixels_clamped(s->block[k], dst[k],

  4861.                                                k & 4 ? s->uvlinesize

  4862.                                                      : s->linesize);

  4863.                 }

  4864.             }

  4865. 

  4866.             if (v->pq >= 9 && v->overlap) {

  4867.                 if (s->mb_x) {

  4868.                     v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);

  4869.                     v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  4870.                     if (!(s->flags & CODEC_FLAG_GRAY)) {

  4871.                         v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  4872.                         v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  4873.                     }

  4874.                 }

  4875.                 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  4876.                 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  4877.                 if (!s->first_slice_line) {

  4878.                     v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);

  4879.                     v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  4880.                     if (!(s->flags & CODEC_FLAG_GRAY)) {

  4881.                         v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  4882.                         v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  4883.                     }

  4884.                 }

  4885.                 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  4886.                 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  4887.             }

  4888.             if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);

  4889. 

  4890.             if (get_bits_count(&s->gb) > v->bits) {

  4891.                 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);

  4892.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",

  4893.                        get_bits_count(&s->gb), v->bits);

  4894.                 return;

  4895.             }

  4896.         }

  4897.         if (!v->s.loop_filter)

  4898.             ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  4899.         else if (s->mb_y)

  4900.             ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  4901. 

  4902.         s->first_slice_line = 0;

  4903.     }

  4904.     if (v->s.loop_filter)

  4905.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  4906. 

  4907.     /* This is intentionally mb_height and not end_mb_y - unlike in advanced

  4908.      * profile, these only differ are when decoding MSS2 rectangles. */

  4909.     ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);

  4910. }

  4911. 

  4912. /** Decode blocks of I-frame for advanced profile

  4913.  */

  4914. static void vc1_decode_i_blocks_adv(VC1Context *v)

  4915. {

  4916.     int k;

  4917.     MpegEncContext *s = &v->s;

  4918.     int cbp, val;

  4919.     uint8_t *coded_val;

  4920.     int mb_pos;

  4921.     int mquant = v->pq;

  4922.     int mqdiff;

  4923.     GetBitContext *gb = &s->gb;

  4924. 

  4925.     /* select codingmode used for VLC tables selection */

  4926.     switch (v->y_ac_table_index) {

  4927.     case 0:

  4928.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4929.         break;

  4930.     case 1:

  4931.         v->codingset = CS_HIGH_MOT_INTRA;

  4932.         break;

  4933.     case 2:

  4934.         v->codingset = CS_MID_RATE_INTRA;

  4935.         break;

  4936.     }

  4937. 

  4938.     switch (v->c_ac_table_index) {

  4939.     case 0:

  4940.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4941.         break;

  4942.     case 1:

  4943.         v->codingset2 = CS_HIGH_MOT_INTER;

  4944.         break;

  4945.     case 2:

  4946.         v->codingset2 = CS_MID_RATE_INTER;

  4947.         break;

  4948.     }

  4949. 

  4950.     // do frame decode

  4951.     s->mb_x             = s->mb_y = 0;

  4952.     s->mb_intra         = 1;

  4953.     s->first_slice_line = 1;

  4954.     s->mb_y             = s->start_mb_y;

  4955.     if (s->start_mb_y) {

  4956.         s->mb_x = 0;

  4957.         init_block_index(v);

  4958.         memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,

  4959.                (1 + s->b8_stride) * sizeof(*s->coded_block));

  4960.     }

  4961.     for (; s->mb_y < s->end_mb_y; s->mb_y++) {

  4962.         s->mb_x = 0;

  4963.         init_block_index(v);

  4964.         for (;s->mb_x < s->mb_width; s->mb_x++) {

  4965.             int16_t (*block)[64] = v->block[v->cur_blk_idx];

  4966.             ff_update_block_index(s);

  4967.             s->bdsp.clear_blocks(block[0]);

  4968.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4969.             s->current_picture.mb_type[mb_pos + v->mb_off]                         = MB_TYPE_INTRA;

  4970.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  4971.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  4972. 

  4973.             // do actual MB decoding and displaying

  4974.             if (v->fieldtx_is_raw)

  4975.                 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);

  4976.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  4977.             if ( v->acpred_is_raw)

  4978.                 v->s.ac_pred = get_bits1(&v->s.gb);

  4979.             else

  4980.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  4981. 

  4982.             if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)

  4983.                 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);

  4984. 

  4985.             GET_MQUANT();

  4986. 

  4987.             s->current_picture.qscale_table[mb_pos] = mquant;

  4988.             /* Set DC scale - y and c use the same */

  4989.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  4990.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  4991. 

  4992.             for (k = 0; k < 6; k++) {

  4993.                 val = ((cbp >> (5 - k)) & 1);

  4994. 

  4995.                 if (k < 4) {

  4996.                     int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);

  4997.                     val        = val ^ pred;

  4998.                     *coded_val = val;

  4999.                 }

  5000.                 cbp |= val << (5 - k);

  5001. 

  5002.                 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);

  5003.                 v->c_avail = !!s->mb_x || (k == 1 || k == 3);

  5004. 

  5005.                 vc1_decode_i_block_adv(v, block[k], k, val,

  5006.                                        (k < 4) ? v->codingset : v->codingset2, mquant);

  5007. 

  5008.                 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))

  5009.                     continue;

  5010.                 v->vc1dsp.vc1_inv_trans_8x8(block[k]);

  5011.             }

  5012. 

  5013.             vc1_smooth_overlap_filter_iblk(v);

  5014.             vc1_put_signed_blocks_clamped(v);

  5015.             if (v->s.loop_filter) vc1_loop_filter_iblk_delayed(v, v->pq);

  5016. 

  5017.             if (get_bits_count(&s->gb) > v->bits) {

  5018.                 // TODO: may need modification to handle slice coding

  5019.                 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);

  5020.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",

  5021.                        get_bits_count(&s->gb), v->bits);

  5022.                 return;

  5023.             }

  5024.         }

  5025.         if (!v->s.loop_filter)

  5026.             ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  5027.         else if (s->mb_y)

  5028.             ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);

  5029.         s->first_slice_line = 0;

  5030.     }

  5031. 

  5032.     /* raw bottom MB row */

  5033.     s->mb_x = 0;

  5034.     init_block_index(v);

  5035. 

  5036.     for (;s->mb_x < s->mb_width; s->mb_x++) {

  5037.         ff_update_block_index(s);

  5038.         vc1_put_signed_blocks_clamped(v);

  5039.         if (v->s.loop_filter)

  5040.             vc1_loop_filter_iblk_delayed(v, v->pq);

  5041.     }

  5042.     if (v->s.loop_filter)

  5043.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y-1)*16, 16);

  5044.     ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  5045.                     (s->end_mb_y << v->field_mode) - 1, ER_MB_END);

  5046. }

  5047. 

  5048. static void vc1_decode_p_blocks(VC1Context *v)

  5049. {

  5050.     MpegEncContext *s = &v->s;

  5051.     int apply_loop_filter;

  5052. 

  5053.     /* select codingmode used for VLC tables selection */

  5054.     switch (v->c_ac_table_index) {

  5055.     case 0:

  5056.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  5057.         break;

  5058.     case 1:

  5059.         v->codingset = CS_HIGH_MOT_INTRA;

  5060.         break;

  5061.     case 2:

  5062.         v->codingset = CS_MID_RATE_INTRA;

  5063.         break;

  5064.     }

  5065. 

  5066.     switch (v->c_ac_table_index) {

  5067.     case 0:

  5068.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  5069.         break;

  5070.     case 1:

  5071.         v->codingset2 = CS_HIGH_MOT_INTER;

  5072.         break;

  5073.     case 2:

  5074.         v->codingset2 = CS_MID_RATE_INTER;

  5075.         break;

  5076.     }

  5077. 

  5078.     apply_loop_filter   = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY) &&

  5079.                           v->fcm == PROGRESSIVE;

  5080.     s->first_slice_line = 1;

  5081.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  5082.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  5083.         s->mb_x = 0;

  5084.         init_block_index(v);

  5085.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  5086.             ff_update_block_index(s);

  5087. 

  5088.             if (v->fcm == ILACE_FIELD)

  5089.                 vc1_decode_p_mb_intfi(v);

  5090.             else if (v->fcm == ILACE_FRAME)

  5091.                 vc1_decode_p_mb_intfr(v);

  5092.             else vc1_decode_p_mb(v);

  5093.             if (s->mb_y != s->start_mb_y && apply_loop_filter)

  5094.                 vc1_apply_p_loop_filter(v);

  5095.             if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  5096.                 // TODO: may need modification to handle slice coding

  5097.                 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);

  5098.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",

  5099.                        get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);

  5100.                 return;

  5101.             }

  5102.         }

  5103.         memmove(v->cbp_base,      v->cbp,      sizeof(v->cbp_base[0])      * s->mb_stride);

  5104.         memmove(v->ttblk_base,    v->ttblk,    sizeof(v->ttblk_base[0])    * s->mb_stride);

  5105.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);

  5106.         memmove(v->luma_mv_base,  v->luma_mv,  sizeof(v->luma_mv_base[0])  * s->mb_stride);

  5107.         if (s->mb_y != s->start_mb_y) ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  5108.         s->first_slice_line = 0;

  5109.     }

  5110.     if (apply_loop_filter) {

  5111.         s->mb_x = 0;

  5112.         init_block_index(v);

  5113.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  5114.             ff_update_block_index(s);

  5115.             vc1_apply_p_loop_filter(v);

  5116.         }

  5117.     }

  5118.     if (s->end_mb_y >= s->start_mb_y)

  5119.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  5120.     ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  5121.                     (s->end_mb_y << v->field_mode) - 1, ER_MB_END);

  5122. }

  5123. 

  5124. static void vc1_decode_b_blocks(VC1Context *v)

  5125. {

  5126.     MpegEncContext *s = &v->s;

  5127. 

  5128.     /* select codingmode used for VLC tables selection */

  5129.     switch (v->c_ac_table_index) {

  5130.     case 0:

  5131.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  5132.         break;

  5133.     case 1:

  5134.         v->codingset = CS_HIGH_MOT_INTRA;

  5135.         break;

  5136.     case 2:

  5137.         v->codingset = CS_MID_RATE_INTRA;

  5138.         break;

  5139.     }

  5140. 

  5141.     switch (v->c_ac_table_index) {

  5142.     case 0:

  5143.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  5144.         break;

  5145.     case 1:

  5146.         v->codingset2 = CS_HIGH_MOT_INTER;

  5147.         break;

  5148.     case 2:

  5149.         v->codingset2 = CS_MID_RATE_INTER;

  5150.         break;

  5151.     }

  5152. 

  5153.     s->first_slice_line = 1;

  5154.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  5155.         s->mb_x = 0;

  5156.         init_block_index(v);

  5157.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  5158.             ff_update_block_index(s);

  5159. 

  5160.             if (v->fcm == ILACE_FIELD)

  5161.                 vc1_decode_b_mb_intfi(v);

  5162.             else if (v->fcm == ILACE_FRAME)

  5163.                 vc1_decode_b_mb_intfr(v);

  5164.             else

  5165.                 vc1_decode_b_mb(v);

  5166.             if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  5167.                 // TODO: may need modification to handle slice coding

  5168.                 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);

  5169.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",

  5170.                        get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);

  5171.                 return;

  5172.             }

  5173.             if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);

  5174.         }

  5175.         if (!v->s.loop_filter)

  5176.             ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  5177.         else if (s->mb_y)

  5178.             ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  5179.         s->first_slice_line = 0;

  5180.     }

  5181.     if (v->s.loop_filter)

  5182.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  5183.     ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  5184.                     (s->end_mb_y << v->field_mode) - 1, ER_MB_END);

  5185. }

  5186. 

  5187. static void vc1_decode_skip_blocks(VC1Context *v)

  5188. {

  5189.     MpegEncContext *s = &v->s;

  5190. 

  5191.     if (!v->s.last_picture.f->data[0])

  5192.         return;

  5193. 

  5194.     ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);

  5195.     s->first_slice_line = 1;

  5196.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  5197.         s->mb_x = 0;

  5198.         init_block_index(v);

  5199.         ff_update_block_index(s);

  5200.         memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize,   s->linesize   * 16);

  5201.         memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);

  5202.         memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);

  5203.         ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  5204.         s->first_slice_line = 0;

  5205.     }

  5206.     s->pict_type = AV_PICTURE_TYPE_P;

  5207. }

  5208. 

  5209. void ff_vc1_decode_blocks(VC1Context *v)

  5210. {

  5211. 

  5212.     v->s.esc3_level_length = 0;

  5213.     if (v->x8_type) {

  5214.         ff_intrax8_decode_picture(&v->x8, 2*v->pq + v->halfpq, v->pq * !v->pquantizer);

  5215.     } else {

  5216.         v->cur_blk_idx     =  0;

  5217.         v->left_blk_idx    = -1;

  5218.         v->topleft_blk_idx =  1;

  5219.         v->top_blk_idx     =  2;

  5220.         switch (v->s.pict_type) {

  5221.         case AV_PICTURE_TYPE_I:

  5222.             if (v->profile == PROFILE_ADVANCED)

  5223.                 vc1_decode_i_blocks_adv(v);

  5224.             else

  5225.                 vc1_decode_i_blocks(v);

  5226.             break;

  5227.         case AV_PICTURE_TYPE_P:

  5228.             if (v->p_frame_skipped)

  5229.                 vc1_decode_skip_blocks(v);

  5230.             else

  5231.                 vc1_decode_p_blocks(v);

  5232.             break;

  5233.         case AV_PICTURE_TYPE_B:

  5234.             if (v->bi_type) {

  5235.                 if (v->profile == PROFILE_ADVANCED)

  5236.                     vc1_decode_i_blocks_adv(v);

  5237.                 else

  5238.                     vc1_decode_i_blocks(v);

  5239.             } else

  5240.                 vc1_decode_b_blocks(v);

  5241.             break;

  5242.         }

  5243.     }

  5244. }

  5245. 

  5246. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  5247. 

  5248. typedef struct {

  5249.     /**

  5250.      * Transform coefficients for both sprites in 16.16 fixed point format,

  5251.      * in the order they appear in the bitstream:

  5252.      *  x scale

  5253.      *  rotation 1 (unused)

  5254.      *  x offset

  5255.      *  rotation 2 (unused)

  5256.      *  y scale

  5257.      *  y offset

  5258.      *  alpha

  5259.      */

  5260.     int coefs[2][7];

  5261. 

  5262.     int effect_type, effect_flag;

  5263.     int effect_pcount1, effect_pcount2;   ///< amount of effect parameters stored in effect_params

  5264.     int effect_params1[15], effect_params2[10]; ///< effect parameters in 16.16 fixed point format

  5265. } SpriteData;

  5266. 

  5267. static inline int get_fp_val(GetBitContext* gb)

  5268. {

  5269.     return (get_bits_long(gb, 30) - (1 << 29)) << 1;

  5270. }

  5271. 

  5272. static void vc1_sprite_parse_transform(GetBitContext* gb, int c[7])

  5273. {

  5274.     c[1] = c[3] = 0;

  5275. 

  5276.     switch (get_bits(gb, 2)) {

  5277.     case 0:

  5278.         c[0] = 1 << 16;

  5279.         c[2] = get_fp_val(gb);

  5280.         c[4] = 1 << 16;

  5281.         break;

  5282.     case 1:

  5283.         c[0] = c[4] = get_fp_val(gb);

  5284.         c[2] = get_fp_val(gb);

  5285.         break;

  5286.     case 2:

  5287.         c[0] = get_fp_val(gb);

  5288.         c[2] = get_fp_val(gb);

  5289.         c[4] = get_fp_val(gb);

  5290.         break;

  5291.     case 3:

  5292.         c[0] = get_fp_val(gb);

  5293.         c[1] = get_fp_val(gb);

  5294.         c[2] = get_fp_val(gb);

  5295.         c[3] = get_fp_val(gb);

  5296.         c[4] = get_fp_val(gb);

  5297.         break;

  5298.     }

  5299.     c[5] = get_fp_val(gb);

  5300.     if (get_bits1(gb))

  5301.         c[6] = get_fp_val(gb);

  5302.     else

  5303.         c[6] = 1 << 16;

  5304. }

  5305. 

  5306. static int vc1_parse_sprites(VC1Context *v, GetBitContext* gb, SpriteData* sd)

  5307. {

  5308.     AVCodecContext *avctx = v->s.avctx;

  5309.     int sprite, i;

  5310. 

  5311.     for (sprite = 0; sprite <= v->two_sprites; sprite++) {

  5312.         vc1_sprite_parse_transform(gb, sd->coefs[sprite]);

  5313.         if (sd->coefs[sprite][1] || sd->coefs[sprite][3])

  5314.             avpriv_request_sample(avctx, "Non-zero rotation coefficients");

  5315.         av_log(avctx, AV_LOG_DEBUG, sprite ? "S2:" : "S1:");

  5316.         for (i = 0; i < 7; i++)

  5317.             av_log(avctx, AV_LOG_DEBUG, " %d.%.3d",

  5318.                    sd->coefs[sprite][i] / (1<<16),

  5319.                    (abs(sd->coefs[sprite][i]) & 0xFFFF) * 1000 / (1 << 16));

  5320.         av_log(avctx, AV_LOG_DEBUG, "\n");

  5321.     }

  5322. 

  5323.     skip_bits(gb, 2);

  5324.     if (sd->effect_type = get_bits_long(gb, 30)) {

  5325.         switch (sd->effect_pcount1 = get_bits(gb, 4)) {

  5326.         case 7:

  5327.             vc1_sprite_parse_transform(gb, sd->effect_params1);

  5328.             break;

  5329.         case 14:

  5330.             vc1_sprite_parse_transform(gb, sd->effect_params1);

  5331.             vc1_sprite_parse_transform(gb, sd->effect_params1 + 7);

  5332.             break;

  5333.         default:

  5334.             for (i = 0; i < sd->effect_pcount1; i++)

  5335.                 sd->effect_params1[i] = get_fp_val(gb);

  5336.         }

  5337.         if (sd->effect_type != 13 || sd->effect_params1[0] != sd->coefs[0][6]) {

  5338.             // effect 13 is simple alpha blending and matches the opacity above

  5339.             av_log(avctx, AV_LOG_DEBUG, "Effect: %d; params: ", sd->effect_type);

  5340.             for (i = 0; i < sd->effect_pcount1; i++)

  5341.                 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",

  5342.                        sd->effect_params1[i] / (1 << 16),

  5343.                        (abs(sd->effect_params1[i]) & 0xFFFF) * 1000 / (1 << 16));

  5344.             av_log(avctx, AV_LOG_DEBUG, "\n");

  5345.         }

  5346. 

  5347.         sd->effect_pcount2 = get_bits(gb, 16);

  5348.         if (sd->effect_pcount2 > 10) {

  5349.             av_log(avctx, AV_LOG_ERROR, "Too many effect parameters\n");

  5350.             return AVERROR_INVALIDDATA;

  5351.         } else if (sd->effect_pcount2) {

  5352.             i = -1;

  5353.             av_log(avctx, AV_LOG_DEBUG, "Effect params 2: ");

  5354.             while (++i < sd->effect_pcount2) {

  5355.                 sd->effect_params2[i] = get_fp_val(gb);

  5356.                 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",

  5357.                        sd->effect_params2[i] / (1 << 16),

  5358.                        (abs(sd->effect_params2[i]) & 0xFFFF) * 1000 / (1 << 16));

  5359.             }

  5360.             av_log(avctx, AV_LOG_DEBUG, "\n");

  5361.         }

  5362.     }

  5363.     if (sd->effect_flag = get_bits1(gb))

  5364.         av_log(avctx, AV_LOG_DEBUG, "Effect flag set\n");

  5365. 

  5366.     if (get_bits_count(gb) >= gb->size_in_bits +

  5367.        (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE ? 64 : 0)) {

  5368.         av_log(avctx, AV_LOG_ERROR, "Buffer overrun\n");

  5369.         return AVERROR_INVALIDDATA;

  5370.     }

  5371.     if (get_bits_count(gb) < gb->size_in_bits - 8)

  5372.         av_log(avctx, AV_LOG_WARNING, "Buffer not fully read\n");

  5373. 

  5374.     return 0;

  5375. }

  5376. 

  5377. static void vc1_draw_sprites(VC1Context *v, SpriteData* sd)

  5378. {

  5379.     int i, plane, row, sprite;

  5380.     int sr_cache[2][2] = { { -1, -1 }, { -1, -1 } };

  5381.     uint8_t* src_h[2][2];

  5382.     int xoff[2], xadv[2], yoff[2], yadv[2], alpha;

  5383.     int ysub[2];

  5384.     MpegEncContext *s = &v->s;

  5385. 

  5386.     for (i = 0; i <= v->two_sprites; i++) {

  5387.         xoff[i] = av_clip(sd->coefs[i][2], 0, v->sprite_width-1 << 16);

  5388.         xadv[i] = sd->coefs[i][0];

  5389.         if (xadv[i] != 1<<16 || (v->sprite_width << 16) - (v->output_width << 16) - xoff[i])

  5390.             xadv[i] = av_clip(xadv[i], 0, ((v->sprite_width<<16) - xoff[i] - 1) / v->output_width);

  5391. 

  5392.         yoff[i] = av_clip(sd->coefs[i][5], 0, v->sprite_height-1 << 16);

  5393.         yadv[i] = av_clip(sd->coefs[i][4], 0, ((v->sprite_height << 16) - yoff[i]) / v->output_height);

  5394.     }

  5395.     alpha = av_clip(sd->coefs[1][6], 0, (1<<16) - 1);

  5396. 

  5397.     for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++) {

  5398.         int width = v->output_width>>!!plane;

  5399. 

  5400.         for (row = 0; row < v->output_height>>!!plane; row++) {

  5401.             uint8_t *dst = v->sprite_output_frame->data[plane] +

  5402.                            v->sprite_output_frame->linesize[plane] * row;

  5403. 

  5404.             for (sprite = 0; sprite <= v->two_sprites; sprite++) {

  5405.                 uint8_t *iplane = s->current_picture.f->data[plane];

  5406.                 int      iline  = s->current_picture.f->linesize[plane];

  5407.                 int      ycoord = yoff[sprite] + yadv[sprite] * row;

  5408.                 int      yline  = ycoord >> 16;

  5409.                 int      next_line;

  5410.                 ysub[sprite] = ycoord & 0xFFFF;

  5411.                 if (sprite) {

  5412.                     iplane = s->last_picture.f->data[plane];

  5413.                     iline  = s->last_picture.f->linesize[plane];

  5414.                 }

  5415.                 next_line = FFMIN(yline + 1, (v->sprite_height >> !!plane) - 1) * iline;

  5416.                 if (!(xoff[sprite] & 0xFFFF) && xadv[sprite] == 1 << 16) {

  5417.                         src_h[sprite][0] = iplane + (xoff[sprite] >> 16) +  yline      * iline;

  5418.                     if (ysub[sprite])

  5419.                         src_h[sprite][1] = iplane + (xoff[sprite] >> 16) + next_line;

  5420.                 } else {

  5421.                     if (sr_cache[sprite][0] != yline) {

  5422.                         if (sr_cache[sprite][1] == yline) {

  5423.                             FFSWAP(uint8_t*, v->sr_rows[sprite][0], v->sr_rows[sprite][1]);

  5424.                             FFSWAP(int,        sr_cache[sprite][0],   sr_cache[sprite][1]);

  5425.                         } else {

  5426.                             v->vc1dsp.sprite_h(v->sr_rows[sprite][0], iplane + yline * iline, xoff[sprite], xadv[sprite], width);

  5427.                             sr_cache[sprite][0] = yline;

  5428.                         }

  5429.                     }

  5430.                     if (ysub[sprite] && sr_cache[sprite][1] != yline + 1) {

  5431.                         v->vc1dsp.sprite_h(v->sr_rows[sprite][1],

  5432.                                            iplane + next_line, xoff[sprite],

  5433.                                            xadv[sprite], width);

  5434.                         sr_cache[sprite][1] = yline + 1;

  5435.                     }

  5436.                     src_h[sprite][0] = v->sr_rows[sprite][0];

  5437.                     src_h[sprite][1] = v->sr_rows[sprite][1];

  5438.                 }

  5439.             }

  5440. 

  5441.             if (!v->two_sprites) {

  5442.                 if (ysub[0]) {

  5443.                     v->vc1dsp.sprite_v_single(dst, src_h[0][0], src_h[0][1], ysub[0], width);

  5444.                 } else {

  5445.                     memcpy(dst, src_h[0][0], width);

  5446.                 }

  5447.             } else {

  5448.                 if (ysub[0] && ysub[1]) {

  5449.                     v->vc1dsp.sprite_v_double_twoscale(dst, src_h[0][0], src_h[0][1], ysub[0],

  5450.                                                        src_h[1][0], src_h[1][1], ysub[1], alpha, width);

  5451.                 } else if (ysub[0]) {

  5452.                     v->vc1dsp.sprite_v_double_onescale(dst, src_h[0][0], src_h[0][1], ysub[0],

  5453.                                                        src_h[1][0], alpha, width);

  5454.                 } else if (ysub[1]) {

  5455.                     v->vc1dsp.sprite_v_double_onescale(dst, src_h[1][0], src_h[1][1], ysub[1],

  5456.                                                        src_h[0][0], (1<<16)-1-alpha, width);

  5457.                 } else {

  5458.                     v->vc1dsp.sprite_v_double_noscale(dst, src_h[0][0], src_h[1][0], alpha, width);

  5459.                 }

  5460.             }

  5461.         }

  5462. 

  5463.         if (!plane) {

  5464.             for (i = 0; i <= v->two_sprites; i++) {

  5465.                 xoff[i] >>= 1;

  5466.                 yoff[i] >>= 1;

  5467.             }

  5468.         }

  5469. 

  5470.     }

  5471. }

  5472. 

  5473. 

  5474. static int vc1_decode_sprites(VC1Context *v, GetBitContext* gb)

  5475. {

  5476.     int ret;

  5477.     MpegEncContext *s     = &v->s;

  5478.     AVCodecContext *avctx = s->avctx;

  5479.     SpriteData sd;

  5480. 

  5481.     memset(&sd, 0, sizeof(sd));

  5482. 

  5483.     ret = vc1_parse_sprites(v, gb, &sd);

  5484.     if (ret < 0)

  5485.         return ret;

  5486. 

  5487.     if (!s->current_picture.f->data[0]) {

  5488.         av_log(avctx, AV_LOG_ERROR, "Got no sprites\n");

  5489.         return -1;

  5490.     }

  5491. 

  5492.     if (v->two_sprites && (!s->last_picture_ptr || !s->last_picture.f->data[0])) {

  5493.         av_log(avctx, AV_LOG_WARNING, "Need two sprites, only got one\n");

  5494.         v->two_sprites = 0;

  5495.     }

  5496. 

  5497.     av_frame_unref(v->sprite_output_frame);

  5498.     if ((ret = ff_get_buffer(avctx, v->sprite_output_frame, 0)) < 0)

  5499.         return ret;

  5500. 

  5501.     vc1_draw_sprites(v, &sd);

  5502. 

  5503.     return 0;

  5504. }

  5505. 

  5506. static void vc1_sprite_flush(AVCodecContext *avctx)

  5507. {

  5508.     VC1Context *v     = avctx->priv_data;

  5509.     MpegEncContext *s = &v->s;

  5510.     AVFrame *f = s->current_picture.f;

  5511.     int plane, i;

  5512. 

  5513.     /* Windows Media Image codecs have a convergence interval of two keyframes.

  5514.        Since we can't enforce it, clear to black the missing sprite. This is

  5515.        wrong but it looks better than doing nothing. */

  5516. 

  5517.     if (f && f->data[0])

  5518.         for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++)

  5519.             for (i = 0; i < v->sprite_height>>!!plane; i++)

  5520.                 memset(f->data[plane] + i * f->linesize[plane],

  5521.                        plane ? 128 : 0, f->linesize[plane]);

  5522. }

  5523. 

  5524. #endif

  5525. 

  5526. av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)

  5527. {

  5528.     MpegEncContext *s = &v->s;

  5529.     int i;

  5530.     int mb_height = FFALIGN(s->mb_height, 2);

  5531. 

  5532.     /* Allocate mb bitplanes */

  5533.     v->mv_type_mb_plane = av_malloc (s->mb_stride * mb_height);

  5534.     v->direct_mb_plane  = av_malloc (s->mb_stride * mb_height);

  5535.     v->forward_mb_plane = av_malloc (s->mb_stride * mb_height);

  5536.     v->fieldtx_plane    = av_mallocz(s->mb_stride * mb_height);

  5537.     v->acpred_plane     = av_malloc (s->mb_stride * mb_height);

  5538.     v->over_flags_plane = av_malloc (s->mb_stride * mb_height);

  5539. 

  5540.     v->n_allocated_blks = s->mb_width + 2;

  5541.     v->block            = av_malloc(sizeof(*v->block) * v->n_allocated_blks);

  5542.     v->cbp_base         = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  5543.     v->cbp              = v->cbp_base + s->mb_stride;

  5544.     v->ttblk_base       = av_malloc(sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);

  5545.     v->ttblk            = v->ttblk_base + s->mb_stride;

  5546.     v->is_intra_base    = av_mallocz(sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);

  5547.     v->is_intra         = v->is_intra_base + s->mb_stride;

  5548.     v->luma_mv_base     = av_mallocz(sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);

  5549.     v->luma_mv          = v->luma_mv_base + s->mb_stride;

  5550. 

  5551.     /* allocate block type info in that way so it could be used with s->block_index[] */

  5552.     v->mb_type_base = av_malloc(s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);

  5553.     v->mb_type[0]   = v->mb_type_base + s->b8_stride + 1;

  5554.     v->mb_type[1]   = v->mb_type_base + s->b8_stride * (mb_height * 2 + 1) + s->mb_stride + 1;

  5555.     v->mb_type[2]   = v->mb_type[1] + s->mb_stride * (mb_height + 1);

  5556. 

  5557.     /* allocate memory to store block level MV info */

  5558.     v->blk_mv_type_base = av_mallocz(     s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);

  5559.     v->blk_mv_type      = v->blk_mv_type_base + s->b8_stride + 1;

  5560.     v->mv_f_base        = av_mallocz(2 * (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2));

  5561.     v->mv_f[0]          = v->mv_f_base + s->b8_stride + 1;

  5562.     v->mv_f[1]          = v->mv_f[0] + (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);

  5563.     v->mv_f_next_base   = av_mallocz(2 * (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2));

  5564.     v->mv_f_next[0]     = v->mv_f_next_base + s->b8_stride + 1;

  5565.     v->mv_f_next[1]     = v->mv_f_next[0] + (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);

  5566. 

  5567.     /* Init coded blocks info */

  5568.     if (v->profile == PROFILE_ADVANCED) {

  5569. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  5570. //            return -1;

  5571. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  5572. //            return -1;

  5573.     }

  5574. 

  5575.     ff_intrax8_common_init(&v->x8,s);

  5576. 

  5577.     if (s->avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || s->avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5578.         for (i = 0; i < 4; i++)

  5579.             if (!(v->sr_rows[i >> 1][i & 1] = av_malloc(v->output_width)))

  5580.                 return AVERROR(ENOMEM);

  5581.     }

  5582. 

  5583.     if (!v->mv_type_mb_plane || !v->direct_mb_plane || !v->acpred_plane || !v->over_flags_plane ||

  5584.         !v->block || !v->cbp_base || !v->ttblk_base || !v->is_intra_base || !v->luma_mv_base ||

  5585.         !v->mb_type_base) {

  5586.         av_freep(&v->mv_type_mb_plane);

  5587.         av_freep(&v->direct_mb_plane);

  5588.         av_freep(&v->acpred_plane);

  5589.         av_freep(&v->over_flags_plane);

  5590.         av_freep(&v->block);

  5591.         av_freep(&v->cbp_base);

  5592.         av_freep(&v->ttblk_base);

  5593.         av_freep(&v->is_intra_base);

  5594.         av_freep(&v->luma_mv_base);

  5595.         av_freep(&v->mb_type_base);

  5596.         return AVERROR(ENOMEM);

  5597.     }

  5598. 

  5599.     return 0;

  5600. }

  5601. 

  5602. av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)

  5603. {

  5604.     int i;

  5605.     for (i = 0; i < 64; i++) {

  5606. #define transpose(x) (((x) >> 3) | (((x) & 7) << 3))

  5607.         v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);

  5608.         v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);

  5609.         v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);

  5610.         v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]);

  5611.         v->zzi_8x8[i]   = transpose(ff_vc1_adv_interlaced_8x8_zz[i]);

  5612.     }

  5613.     v->left_blk_sh = 0;

  5614.     v->top_blk_sh  = 3;

  5615. }

  5616. 

  5617. /** Initialize a VC1/WMV3 decoder

  5618.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  5619.  * @todo TODO: Decypher remaining bits in extra_data

  5620.  */

  5621. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  5622. {

  5623.     VC1Context *v = avctx->priv_data;

  5624.     MpegEncContext *s = &v->s;

  5625.     GetBitContext gb;

  5626.     int ret;

  5627. 

  5628.     /* save the container output size for WMImage */

  5629.     v->output_width  = avctx->width;

  5630.     v->output_height = avctx->height;

  5631. 

  5632.     if (!avctx->extradata_size || !avctx->extradata)

  5633.         return -1;

  5634.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  5635.         avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);

  5636.     else

  5637.         avctx->pix_fmt = AV_PIX_FMT_GRAY8;

  5638.     v->s.avctx = avctx;

  5639. 

  5640.     if ((ret = ff_vc1_init_common(v)) < 0)

  5641.         return ret;

  5642.     // ensure static VLC tables are initialized

  5643.     if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)

  5644.         return ret;

  5645.     if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0)

  5646.         return ret;

  5647.     // Hack to ensure the above functions will be called

  5648.     // again once we know all necessary settings.

  5649.     // That this is necessary might indicate a bug.

  5650.     ff_vc1_decode_end(avctx);

  5651. 

  5652.     ff_blockdsp_init(&s->bdsp, avctx);

  5653.     ff_h264chroma_init(&v->h264chroma, 8);

  5654.     ff_qpeldsp_init(&s->qdsp);

  5655. 

  5656.     if (avctx->codec_id == AV_CODEC_ID_WMV3 || avctx->codec_id == AV_CODEC_ID_WMV3IMAGE) {

  5657.         int count = 0;

  5658. 

  5659.         // looks like WMV3 has a sequence header stored in the extradata

  5660.         // advanced sequence header may be before the first frame

  5661.         // the last byte of the extradata is a version number, 1 for the

  5662.         // samples we can decode

  5663. 

  5664.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  5665. 

  5666.         if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0)

  5667.           return ret;

  5668. 

  5669.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  5670.         if (count > 0) {

  5671.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  5672.                    count, get_bits(&gb, count));

  5673.         } else if (count < 0) {

  5674.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  5675.         }

  5676.     } else { // VC1/WVC1/WVP2

  5677.         const uint8_t *start = avctx->extradata;

  5678.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  5679.         const uint8_t *next;

  5680.         int size, buf2_size;

  5681.         uint8_t *buf2 = NULL;

  5682.         int seq_initialized = 0, ep_initialized = 0;

  5683. 

  5684.         if (avctx->extradata_size < 16) {

  5685.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  5686.             return -1;

  5687.         }

  5688. 

  5689.         buf2  = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5690.         start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv

  5691.         next  = start;

  5692.         for (; next < end; start = next) {

  5693.             next = find_next_marker(start + 4, end);

  5694.             size = next - start - 4;

  5695.             if (size <= 0)

  5696.                 continue;

  5697.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  5698.             init_get_bits(&gb, buf2, buf2_size * 8);

  5699.             switch (AV_RB32(start)) {

  5700.             case VC1_CODE_SEQHDR:

  5701.                 if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0) {

  5702.                     av_free(buf2);

  5703.                     return ret;

  5704.                 }

  5705.                 seq_initialized = 1;

  5706.                 break;

  5707.             case VC1_CODE_ENTRYPOINT:

  5708.                 if ((ret = ff_vc1_decode_entry_point(avctx, v, &gb)) < 0) {

  5709.                     av_free(buf2);

  5710.                     return ret;

  5711.                 }

  5712.                 ep_initialized = 1;

  5713.                 break;

  5714.             }

  5715.         }

  5716.         av_free(buf2);

  5717.         if (!seq_initialized || !ep_initialized) {

  5718.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  5719.             return -1;

  5720.         }

  5721.         v->res_sprite = (avctx->codec_id == AV_CODEC_ID_VC1IMAGE);

  5722.     }

  5723. 

  5724.     v->sprite_output_frame = av_frame_alloc();

  5725.     if (!v->sprite_output_frame)

  5726.         return AVERROR(ENOMEM);

  5727. 

  5728.     avctx->profile = v->profile;

  5729.     if (v->profile == PROFILE_ADVANCED)

  5730.         avctx->level = v->level;

  5731. 

  5732.     avctx->has_b_frames = !!avctx->max_b_frames;

  5733. 

  5734.     s->mb_width  = (avctx->coded_width  + 15) >> 4;

  5735.     s->mb_height = (avctx->coded_height + 15) >> 4;

  5736. 

  5737.     if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {

  5738.         ff_vc1_init_transposed_scantables(v);

  5739.     } else {

  5740.         memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64);

  5741.         v->left_blk_sh = 3;

  5742.         v->top_blk_sh  = 0;

  5743.     }

  5744. 

  5745.     if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5746.         v->sprite_width  = avctx->coded_width;

  5747.         v->sprite_height = avctx->coded_height;

  5748. 

  5749.         avctx->coded_width  = avctx->width  = v->output_width;

  5750.         avctx->coded_height = avctx->height = v->output_height;

  5751. 

  5752.         // prevent 16.16 overflows

  5753.         if (v->sprite_width  > 1 << 14 ||

  5754.             v->sprite_height > 1 << 14 ||

  5755.             v->output_width  > 1 << 14 ||

  5756.             v->output_height > 1 << 14) return -1;

  5757. 

  5758.         if ((v->sprite_width&1) || (v->sprite_height&1)) {

  5759.             avpriv_request_sample(avctx, "odd sprites support");

  5760.             return AVERROR_PATCHWELCOME;

  5761.         }

  5762.     }

  5763.     return 0;

  5764. }

  5765. 

  5766. /** Close a VC1/WMV3 decoder

  5767.  * @warning Initial try at using MpegEncContext stuff

  5768.  */

  5769. av_cold int ff_vc1_decode_end(AVCodecContext *avctx)

  5770. {

  5771.     VC1Context *v = avctx->priv_data;

  5772.     int i;

  5773. 

  5774.     av_frame_free(&v->sprite_output_frame);

  5775. 

  5776.     for (i = 0; i < 4; i++)

  5777.         av_freep(&v->sr_rows[i >> 1][i & 1]);

  5778.     av_freep(&v->hrd_rate);

  5779.     av_freep(&v->hrd_buffer);

  5780.     ff_mpv_common_end(&v->s);

  5781.     av_freep(&v->mv_type_mb_plane);

  5782.     av_freep(&v->direct_mb_plane);

  5783.     av_freep(&v->forward_mb_plane);

  5784.     av_freep(&v->fieldtx_plane);

  5785.     av_freep(&v->acpred_plane);

  5786.     av_freep(&v->over_flags_plane);

  5787.     av_freep(&v->mb_type_base);

  5788.     av_freep(&v->blk_mv_type_base);

  5789.     av_freep(&v->mv_f_base);

  5790.     av_freep(&v->mv_f_next_base);

  5791.     av_freep(&v->block);

  5792.     av_freep(&v->cbp_base);

  5793.     av_freep(&v->ttblk_base);

  5794.     av_freep(&v->is_intra_base); // FIXME use v->mb_type[]

  5795.     av_freep(&v->luma_mv_base);

  5796.     ff_intrax8_common_end(&v->x8);

  5797.     return 0;

  5798. }

  5799. 

  5800. 

  5801. /** Decode a VC1/WMV3 frame

  5802.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  5803.  */

  5804. static int vc1_decode_frame(AVCodecContext *avctx, void *data,

  5805.                             int *got_frame, AVPacket *avpkt)

  5806. {

  5807.     const uint8_t *buf = avpkt->data;

  5808.     int buf_size = avpkt->size, n_slices = 0, i, ret;

  5809.     VC1Context *v = avctx->priv_data;

  5810.     MpegEncContext *s = &v->s;

  5811.     AVFrame *pict = data;

  5812.     uint8_t *buf2 = NULL;

  5813.     const uint8_t *buf_start = buf, *buf_start_second_field = NULL;

  5814.     int mb_height, n_slices1=-1;

  5815.     struct {

  5816.         uint8_t *buf;

  5817.         GetBitContext gb;

  5818.         int mby_start;

  5819.     } *slices = NULL, *tmp;

  5820. 

  5821.     v->second_field = 0;

  5822. 

  5823.     if(s->flags & CODEC_FLAG_LOW_DELAY)

  5824.         s->low_delay = 1;

  5825. 

  5826.     /* no supplementary picture */

  5827.     if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == VC1_CODE_ENDOFSEQ)) {

  5828.         /* special case for last picture */

  5829.         if (s->low_delay == 0 && s->next_picture_ptr) {

  5830.             if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)

  5831.                 return ret;

  5832.             s->next_picture_ptr = NULL;

  5833. 

  5834.             *got_frame = 1;

  5835.         }

  5836. 

  5837.         return buf_size;

  5838.     }

  5839. 

  5840.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) {

  5841.         if (v->profile < PROFILE_ADVANCED)

  5842.             avctx->pix_fmt = AV_PIX_FMT_VDPAU_WMV3;

  5843.         else

  5844.             avctx->pix_fmt = AV_PIX_FMT_VDPAU_VC1;

  5845.     }

  5846. 

  5847.     //for advanced profile we may need to parse and unescape data

  5848.     if (avctx->codec_id == AV_CODEC_ID_VC1 || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5849.         int buf_size2 = 0;

  5850.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5851.         if (!buf2)

  5852.             return AVERROR(ENOMEM);

  5853. 

  5854.         if (IS_MARKER(AV_RB32(buf))) { /* frame starts with marker and needs to be parsed */

  5855.             const uint8_t *start, *end, *next;

  5856.             int size;

  5857. 

  5858.             next = buf;

  5859.             for (start = buf, end = buf + buf_size; next < end; start = next) {

  5860.                 next = find_next_marker(start + 4, end);

  5861.                 size = next - start - 4;

  5862.                 if (size <= 0) continue;

  5863.                 switch (AV_RB32(start)) {

  5864.                 case VC1_CODE_FRAME:

  5865.                     if (avctx->hwaccel ||

  5866.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  5867.                         buf_start = start;

  5868.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  5869.                     break;

  5870.                 case VC1_CODE_FIELD: {

  5871.                     int buf_size3;

  5872.                     if (avctx->hwaccel ||

  5873.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  5874.                         buf_start_second_field = start;

  5875.                     tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));

  5876.                     if (!tmp)

  5877.                         goto err;

  5878.                     slices = tmp;

  5879.                     slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5880.                     if (!slices[n_slices].buf)

  5881.                         goto err;

  5882.                     buf_size3 = vc1_unescape_buffer(start + 4, size,

  5883.                                                     slices[n_slices].buf);

  5884.                     init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5885.                                   buf_size3 << 3);

  5886.                     /* assuming that the field marker is at the exact middle,

  5887.                        hope it's correct */

  5888.                     slices[n_slices].mby_start = s->mb_height + 1 >> 1;

  5889.                     n_slices1 = n_slices - 1; // index of the last slice of the first field

  5890.                     n_slices++;

  5891.                     break;

  5892.                 }

  5893.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  5894.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  5895.                     init_get_bits(&s->gb, buf2, buf_size2 * 8);

  5896.                     ff_vc1_decode_entry_point(avctx, v, &s->gb);

  5897.                     break;

  5898.                 case VC1_CODE_SLICE: {

  5899.                     int buf_size3;

  5900.                     tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));

  5901.                     if (!tmp)

  5902.                         goto err;

  5903.                     slices = tmp;

  5904.                     slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5905.                     if (!slices[n_slices].buf)

  5906.                         goto err;

  5907.                     buf_size3 = vc1_unescape_buffer(start + 4, size,

  5908.                                                     slices[n_slices].buf);

  5909.                     init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5910.                                   buf_size3 << 3);

  5911.                     slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);

  5912.                     n_slices++;

  5913.                     break;

  5914.                 }

  5915.                 }

  5916.             }

  5917.         } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */

  5918.             const uint8_t *divider;

  5919.             int buf_size3;

  5920. 

  5921.             divider = find_next_marker(buf, buf + buf_size);

  5922.             if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {

  5923.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  5924.                 goto err;

  5925.             } else { // found field marker, unescape second field

  5926.                 if (avctx->hwaccel ||

  5927.                     s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  5928.                     buf_start_second_field = divider;

  5929.                 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));

  5930.                 if (!tmp)

  5931.                     goto err;

  5932.                 slices = tmp;

  5933.                 slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5934.                 if (!slices[n_slices].buf)

  5935.                     goto err;

  5936.                 buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);

  5937.                 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5938.                               buf_size3 << 3);

  5939.                 slices[n_slices].mby_start = s->mb_height + 1 >> 1;

  5940.                 n_slices1 = n_slices - 1;

  5941.                 n_slices++;

  5942.             }

  5943.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  5944.         } else {

  5945.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  5946.         }

  5947.         init_get_bits(&s->gb, buf2, buf_size2*8);

  5948.     } else

  5949.         init_get_bits(&s->gb, buf, buf_size*8);

  5950. 

  5951.     if (v->res_sprite) {

  5952.         v->new_sprite  = !get_bits1(&s->gb);

  5953.         v->two_sprites =  get_bits1(&s->gb);

  5954.         /* res_sprite means a Windows Media Image stream, AV_CODEC_ID_*IMAGE means

  5955.            we're using the sprite compositor. These are intentionally kept separate

  5956.            so you can get the raw sprites by using the wmv3 decoder for WMVP or

  5957.            the vc1 one for WVP2 */

  5958.         if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5959.             if (v->new_sprite) {

  5960.                 // switch AVCodecContext parameters to those of the sprites

  5961.                 avctx->width  = avctx->coded_width  = v->sprite_width;

  5962.                 avctx->height = avctx->coded_height = v->sprite_height;

  5963.             } else {

  5964.                 goto image;

  5965.             }

  5966.         }

  5967.     }

  5968. 

  5969.     if (s->context_initialized &&

  5970.         (s->width  != avctx->coded_width ||

  5971.          s->height != avctx->coded_height)) {

  5972.         ff_vc1_decode_end(avctx);

  5973.     }

  5974. 

  5975.     if (!s->context_initialized) {

  5976.         if (ff_msmpeg4_decode_init(avctx) < 0)

  5977.             goto err;

  5978.         if (ff_vc1_decode_init_alloc_tables(v) < 0) {

  5979.             ff_mpv_common_end(s);

  5980.             goto err;

  5981.         }

  5982. 

  5983.         s->low_delay = !avctx->has_b_frames || v->res_sprite;

  5984. 

  5985.         if (v->profile == PROFILE_ADVANCED) {

  5986.             if(avctx->coded_width<=1 || avctx->coded_height<=1)

  5987.                 goto err;

  5988.             s->h_edge_pos = avctx->coded_width;

  5989.             s->v_edge_pos = avctx->coded_height;

  5990.         }

  5991.     }

  5992. 

  5993.     // do parse frame header

  5994.     v->pic_header_flag = 0;

  5995.     v->first_pic_header_flag = 1;

  5996.     if (v->profile < PROFILE_ADVANCED) {

  5997.         if (ff_vc1_parse_frame_header(v, &s->gb) < 0) {

  5998.             goto err;

  5999.         }

  6000.     } else {

  6001.         if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {

  6002.             goto err;

  6003.         }

  6004.     }

  6005.     v->first_pic_header_flag = 0;

  6006. 

  6007.     if (avctx->debug & FF_DEBUG_PICT_INFO)

  6008.         av_log(v->s.avctx, AV_LOG_DEBUG, "pict_type: %c\n", av_get_picture_type_char(s->pict_type));

  6009. 

  6010.     if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)

  6011.         && s->pict_type != AV_PICTURE_TYPE_I) {

  6012.         av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");

  6013.         goto err;

  6014.     }

  6015. 

  6016.     if ((s->mb_height >> v->field_mode) == 0) {

  6017.         av_log(v->s.avctx, AV_LOG_ERROR, "image too short\n");

  6018.         goto err;

  6019.     }

  6020. 

  6021.     // for skipping the frame

  6022.     s->current_picture.f->pict_type = s->pict_type;

  6023.     s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;

  6024. 

  6025.     /* skip B-frames if we don't have reference frames */

  6026.     if (s->last_picture_ptr == NULL && (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) {

  6027.         av_log(v->s.avctx, AV_LOG_DEBUG, "Skipping B frame without reference frames\n");

  6028.         goto end;

  6029.     }

  6030.     if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||

  6031.         (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) ||

  6032.          avctx->skip_frame >= AVDISCARD_ALL) {

  6033.         goto end;

  6034.     }

  6035. 

  6036.     if (s->next_p_frame_damaged) {

  6037.         if (s->pict_type == AV_PICTURE_TYPE_B)

  6038.             goto end;

  6039.         else

  6040.             s->next_p_frame_damaged = 0;

  6041.     }

  6042. 

  6043.     if (ff_mpv_frame_start(s, avctx) < 0) {

  6044.         goto err;

  6045.     }

  6046. 

  6047.     v->s.current_picture_ptr->field_picture = v->field_mode;

  6048.     v->s.current_picture_ptr->f->interlaced_frame = (v->fcm != PROGRESSIVE);

  6049.     v->s.current_picture_ptr->f->top_field_first  = v->tff;

  6050. 

  6051.     // process pulldown flags

  6052.     s->current_picture_ptr->f->repeat_pict = 0;

  6053.     // Pulldown flags are only valid when 'broadcast' has been set.

  6054.     // So ticks_per_frame will be 2

  6055.     if (v->rff) {

  6056.         // repeat field

  6057.         s->current_picture_ptr->f->repeat_pict = 1;

  6058.     } else if (v->rptfrm) {

  6059.         // repeat frames

  6060.         s->current_picture_ptr->f->repeat_pict = v->rptfrm * 2;

  6061.     }

  6062. 

  6063.     s->me.qpel_put = s->qdsp.put_qpel_pixels_tab;

  6064.     s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;

  6065. 

  6066.     if ((CONFIG_VC1_VDPAU_DECODER)

  6067.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) {

  6068.         if (v->field_mode && buf_start_second_field) {

  6069.             ff_vdpau_vc1_decode_picture(s, buf_start, buf_start_second_field - buf_start);

  6070.             ff_vdpau_vc1_decode_picture(s, buf_start_second_field, (buf + buf_size) - buf_start_second_field);

  6071.         } else {

  6072.             ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  6073.         }

  6074.     } else if (avctx->hwaccel) {

  6075.         if (v->field_mode && buf_start_second_field) {

  6076.             // decode first field

  6077.             s->picture_structure = PICT_BOTTOM_FIELD - v->tff;

  6078.             if (avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start) < 0)

  6079.                 goto err;

  6080.             if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start) < 0)

  6081.                 goto err;

  6082.             if (avctx->hwaccel->end_frame(avctx) < 0)

  6083.                 goto err;

  6084. 

  6085.             // decode second field

  6086.             s->gb = slices[n_slices1 + 1].gb;

  6087.             s->picture_structure = PICT_TOP_FIELD + v->tff;

  6088.             v->second_field = 1;

  6089.             v->pic_header_flag = 0;

  6090.             if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {

  6091.                 av_log(avctx, AV_LOG_ERROR, "parsing header for second field failed");

  6092.                 goto err;

  6093.             }

  6094.             v->s.current_picture_ptr->f->pict_type = v->s.pict_type;

  6095. 

  6096.             if (avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field) < 0)

  6097.                 goto err;

  6098.             if (avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field) < 0)

  6099.                 goto err;

  6100.             if (avctx->hwaccel->end_frame(avctx) < 0)

  6101.                 goto err;

  6102.         } else {

  6103.             s->picture_structure = PICT_FRAME;

  6104.             if (avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  6105.                 goto err;

  6106.             if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  6107.                 goto err;

  6108.             if (avctx->hwaccel->end_frame(avctx) < 0)

  6109.                 goto err;

  6110.         }

  6111.     } else {

  6112.         int header_ret = 0;

  6113. 

  6114.         ff_mpeg_er_frame_start(s);

  6115. 

  6116.         v->bits = buf_size * 8;

  6117.         v->end_mb_x = s->mb_width;

  6118.         if (v->field_mode) {

  6119.             s->current_picture.f->linesize[0] <<= 1;

  6120.             s->current_picture.f->linesize[1] <<= 1;

  6121.             s->current_picture.f->linesize[2] <<= 1;

  6122.             s->linesize                      <<= 1;

  6123.             s->uvlinesize                    <<= 1;

  6124.         }

  6125.         mb_height = s->mb_height >> v->field_mode;

  6126. 

  6127.         av_assert0 (mb_height > 0);

  6128. 

  6129.         for (i = 0; i <= n_slices; i++) {

  6130.             if (i > 0 &&  slices[i - 1].mby_start >= mb_height) {

  6131.                 if (v->field_mode <= 0) {

  6132.                     av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "

  6133.                            "picture boundary (%d >= %d)\n", i,

  6134.                            slices[i - 1].mby_start, mb_height);

  6135.                     continue;

  6136.                 }

  6137.                 v->second_field = 1;

  6138.                 av_assert0((s->mb_height & 1) == 0);

  6139.                 v->blocks_off   = s->b8_stride * (s->mb_height&~1);

  6140.                 v->mb_off       = s->mb_stride * s->mb_height >> 1;

  6141.             } else {

  6142.                 v->second_field = 0;

  6143.                 v->blocks_off   = 0;

  6144.                 v->mb_off       = 0;

  6145.             }

  6146.             if (i) {

  6147.                 v->pic_header_flag = 0;

  6148.                 if (v->field_mode && i == n_slices1 + 2) {

  6149.                     if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {

  6150.                         av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");

  6151.                         if (avctx->err_recognition & AV_EF_EXPLODE)

  6152.                             goto err;

  6153.                         continue;

  6154.                     }

  6155.                 } else if (get_bits1(&s->gb)) {

  6156.                     v->pic_header_flag = 1;

  6157.                     if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {

  6158.                         av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");

  6159.                         if (avctx->err_recognition & AV_EF_EXPLODE)

  6160.                             goto err;

  6161.                         continue;

  6162.                     }

  6163.                 }

  6164.             }

  6165.             if (header_ret < 0)

  6166.                 continue;

  6167.             s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);

  6168.             if (!v->field_mode || v->second_field)

  6169.                 s->end_mb_y = (i == n_slices     ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);

  6170.             else {

  6171.                 if (i >= n_slices) {

  6172.                     av_log(v->s.avctx, AV_LOG_ERROR, "first field slice count too large\n");

  6173.                     continue;

  6174.                 }

  6175.                 s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);

  6176.             }

  6177.             if (s->end_mb_y <= s->start_mb_y) {

  6178.                 av_log(v->s.avctx, AV_LOG_ERROR, "end mb y %d %d invalid\n", s->end_mb_y, s->start_mb_y);

  6179.                 continue;

  6180.             }

  6181.             if (!v->p_frame_skipped && s->pict_type != AV_PICTURE_TYPE_I && !v->cbpcy_vlc) {

  6182.                 av_log(v->s.avctx, AV_LOG_ERROR, "missing cbpcy_vlc\n");

  6183.                 continue;

  6184.             }

  6185.             ff_vc1_decode_blocks(v);

  6186.             if (i != n_slices)

  6187.                 s->gb = slices[i].gb;

  6188.         }

  6189.         if (v->field_mode) {

  6190.             v->second_field = 0;

  6191.             s->current_picture.f->linesize[0] >>= 1;

  6192.             s->current_picture.f->linesize[1] >>= 1;

  6193.             s->current_picture.f->linesize[2] >>= 1;

  6194.             s->linesize                      >>= 1;

  6195.             s->uvlinesize                    >>= 1;

  6196.             if (v->s.pict_type != AV_PICTURE_TYPE_BI && v->s.pict_type != AV_PICTURE_TYPE_B) {

  6197.                 FFSWAP(uint8_t *, v->mv_f_next[0], v->mv_f[0]);

  6198.                 FFSWAP(uint8_t *, v->mv_f_next[1], v->mv_f[1]);

  6199.             }

  6200.         }

  6201.         av_dlog(s->avctx, "Consumed %i/%i bits\n",

  6202.                 get_bits_count(&s->gb), s->gb.size_in_bits);

  6203. //  if (get_bits_count(&s->gb) > buf_size * 8)

  6204. //      return -1;

  6205.         if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B)

  6206.             goto err;

  6207.         if (!v->field_mode)

  6208.             ff_er_frame_end(&s->er);

  6209.     }

  6210. 

  6211.     ff_mpv_frame_end(s);

  6212. 

  6213.     if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  6214. image:

  6215.         avctx->width  = avctx->coded_width  = v->output_width;

  6216.         avctx->height = avctx->coded_height = v->output_height;

  6217.         if (avctx->skip_frame >= AVDISCARD_NONREF)

  6218.             goto end;

  6219. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  6220.         if (vc1_decode_sprites(v, &s->gb))

  6221.             goto err;

  6222. #endif

  6223.         if ((ret = av_frame_ref(pict, v->sprite_output_frame)) < 0)

  6224.             goto err;

  6225.         *got_frame = 1;

  6226.     } else {

  6227.         if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {

  6228.             if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)

  6229.                 goto err;

  6230.             ff_print_debug_info(s, s->current_picture_ptr, pict);

  6231.             *got_frame = 1;

  6232.         } else if (s->last_picture_ptr != NULL) {

  6233.             if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)

  6234.                 goto err;

  6235.             ff_print_debug_info(s, s->last_picture_ptr, pict);

  6236.             *got_frame = 1;

  6237.         }

  6238.     }

  6239. 

  6240. end:

  6241.     av_free(buf2);

  6242.     for (i = 0; i < n_slices; i++)

  6243.         av_free(slices[i].buf);

  6244.     av_free(slices);

  6245.     return buf_size;

  6246. 

  6247. err:

  6248.     av_free(buf2);

  6249.     for (i = 0; i < n_slices; i++)

  6250.         av_free(slices[i].buf);

  6251.     av_free(slices);

  6252.     return -1;

  6253. }

  6254. 

  6255. 

  6256. static const AVProfile profiles[] = {

  6257.     { FF_PROFILE_VC1_SIMPLE,   "Simple"   },

  6258.     { FF_PROFILE_VC1_MAIN,     "Main"     },

  6259.     { FF_PROFILE_VC1_COMPLEX,  "Complex"  },

  6260.     { FF_PROFILE_VC1_ADVANCED, "Advanced" },

  6261.     { FF_PROFILE_UNKNOWN },

  6262. };

  6263. 

  6264. static const enum AVPixelFormat vc1_hwaccel_pixfmt_list_420[] = {

  6265. #if CONFIG_VC1_DXVA2_HWACCEL

  6266.     AV_PIX_FMT_DXVA2_VLD,

  6267. #endif

  6268. #if CONFIG_VC1_VAAPI_HWACCEL

  6269.     AV_PIX_FMT_VAAPI_VLD,

  6270. #endif

  6271. #if CONFIG_VC1_VDPAU_HWACCEL

  6272.     AV_PIX_FMT_VDPAU,

  6273. #endif

  6274.     AV_PIX_FMT_YUV420P,

  6275.     AV_PIX_FMT_NONE

  6276. };

  6277. 

  6278. AVCodec ff_vc1_decoder = {

  6279.     .name           = "vc1",

  6280.     .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  6281.     .type           = AVMEDIA_TYPE_VIDEO,

  6282.     .id             = AV_CODEC_ID_VC1,

  6283.     .priv_data_size = sizeof(VC1Context),

  6284.     .init           = vc1_decode_init,

  6285.     .close          = ff_vc1_decode_end,

  6286.     .decode         = vc1_decode_frame,

  6287.     .flush          = ff_mpeg_flush,

  6288.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  6289.     .pix_fmts       = vc1_hwaccel_pixfmt_list_420,

  6290.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  6291. };

  6292. 

  6293. #if CONFIG_WMV3_DECODER

  6294. AVCodec ff_wmv3_decoder = {

  6295.     .name           = "wmv3",

  6296.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  6297.     .type           = AVMEDIA_TYPE_VIDEO,

  6298.     .id             = AV_CODEC_ID_WMV3,

  6299.     .priv_data_size = sizeof(VC1Context),

  6300.     .init           = vc1_decode_init,

  6301.     .close          = ff_vc1_decode_end,

  6302.     .decode         = vc1_decode_frame,

  6303.     .flush          = ff_mpeg_flush,

  6304.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  6305.     .pix_fmts       = vc1_hwaccel_pixfmt_list_420,

  6306.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  6307. };

  6308. #endif

  6309. 

  6310. #if CONFIG_WMV3_VDPAU_DECODER

  6311. AVCodec ff_wmv3_vdpau_decoder = {

  6312.     .name           = "wmv3_vdpau",

  6313.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  6314.     .type           = AVMEDIA_TYPE_VIDEO,

  6315.     .id             = AV_CODEC_ID_WMV3,

  6316.     .priv_data_size = sizeof(VC1Context),

  6317.     .init           = vc1_decode_init,

  6318.     .close          = ff_vc1_decode_end,

  6319.     .decode         = vc1_decode_frame,

  6320.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  6321.     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_WMV3, AV_PIX_FMT_NONE },

  6322.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  6323. };

  6324. #endif

  6325. 

  6326. #if CONFIG_VC1_VDPAU_DECODER

  6327. AVCodec ff_vc1_vdpau_decoder = {

  6328.     .name           = "vc1_vdpau",

  6329.     .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  6330.     .type           = AVMEDIA_TYPE_VIDEO,

  6331.     .id             = AV_CODEC_ID_VC1,

  6332.     .priv_data_size = sizeof(VC1Context),

  6333.     .init           = vc1_decode_init,

  6334.     .close          = ff_vc1_decode_end,

  6335.     .decode         = vc1_decode_frame,

  6336.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  6337.     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_VC1, AV_PIX_FMT_NONE },

  6338.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  6339. };

  6340. #endif

  6341. 

  6342. #if CONFIG_WMV3IMAGE_DECODER

  6343. AVCodec ff_wmv3image_decoder = {

  6344.     .name           = "wmv3image",

  6345.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),

  6346.     .type           = AVMEDIA_TYPE_VIDEO,

  6347.     .id             = AV_CODEC_ID_WMV3IMAGE,

  6348.     .priv_data_size = sizeof(VC1Context),

  6349.     .init           = vc1_decode_init,

  6350.     .close          = ff_vc1_decode_end,

  6351.     .decode         = vc1_decode_frame,

  6352.     .capabilities   = CODEC_CAP_DR1,

  6353.     .flush          = vc1_sprite_flush,

  6354.     .pix_fmts       = (const enum AVPixelFormat[]) {

  6355.         AV_PIX_FMT_YUV420P,

  6356.         AV_PIX_FMT_NONE

  6357.     },

  6358. };

  6359. #endif

  6360. 

  6361. #if CONFIG_VC1IMAGE_DECODER

  6362. AVCodec ff_vc1image_decoder = {

  6363.     .name           = "vc1image",

  6364.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),

  6365.     .type           = AVMEDIA_TYPE_VIDEO,

  6366.     .id             = AV_CODEC_ID_VC1IMAGE,

  6367.     .priv_data_size = sizeof(VC1Context),

  6368.     .init           = vc1_decode_init,

  6369.     .close          = ff_vc1_decode_end,

  6370.     .decode         = vc1_decode_frame,

  6371.     .capabilities   = CODEC_CAP_DR1,

  6372.     .flush          = vc1_sprite_flush,

  6373.     .pix_fmts       = (const enum AVPixelFormat[]) {

  6374.         AV_PIX_FMT_YUV420P,

  6375.         AV_PIX_FMT_NONE

  6376.     },

  6377. };

  6378. #endif