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FFmpeg/libavcodec/vc1dec.c

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  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 Libav.

  8.  *

  9.  * Libav 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.  * Libav 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 Libav; 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 "mpegvideo.h"

  33. #include "h263.h"

  34. #include "h264chroma.h"

  35. #include "vc1.h"

  36. #include "vc1data.h"

  37. #include "vc1acdata.h"

  38. #include "msmpeg4data.h"

  39. #include "unary.h"

  40. #include "mathops.h"

  41. #include "vdpau_internal.h"

  42. 

  43. #undef NDEBUG

  44. #include <assert.h>

  45. 

  46. #define MB_INTRA_VLC_BITS 9

  47. #define DC_VLC_BITS 9

  48. 

  49. 

  50. // offset tables for interlaced picture MVDATA decoding

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

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

  53. 

  54. /***********************************************************************/

  55. /**

  56.  * @name VC-1 Bitplane decoding

  57.  * @see 8.7, p56

  58.  * @{

  59.  */

  60. 

  61. /**

  62.  * Imode types

  63.  * @{

  64.  */

  65. enum Imode {

  66.     IMODE_RAW,

  67.     IMODE_NORM2,

  68.     IMODE_DIFF2,

  69.     IMODE_NORM6,

  70.     IMODE_DIFF6,

  71.     IMODE_ROWSKIP,

  72.     IMODE_COLSKIP

  73. };

  74. /** @} */ //imode defines

  75. 

  76. static void init_block_index(VC1Context *v)

  77. {

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

  79.     ff_init_block_index(s);

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

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

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

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

  84.     }

  85. }

  86. 

  87. /** @} */ //Bitplane group

  88. 

  89. static void vc1_put_signed_blocks_clamped(VC1Context *v)

  90. {

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

  92.     int topleft_mb_pos, top_mb_pos;

  93.     int stride_y, fieldtx = 0;

  94.     int v_dist;

  95. 

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

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

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

  99.      * present as well.

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

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

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

  103.     if (!s->first_slice_line) {

  104.         if (s->mb_x) {

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

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

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

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

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

  110.             s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][0],

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

  112.                                              stride_y);

  113.             s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][1],

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

  115.                                              stride_y);

  116.             s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][2],

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

  118.                                              stride_y);

  119.             s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][3],

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

  121.                                              stride_y);

  122.             s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][4],

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

  124.                                              s->uvlinesize);

  125.             s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][5],

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

  127.                                              s->uvlinesize);

  128.         }

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

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

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

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

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

  134.             v_dist     = fieldtx ? 15 : 8;

  135.             s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][0],

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

  137.                                              stride_y);

  138.             s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][1],

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

  140.                                              stride_y);

  141.             s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][2],

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

  143.                                              stride_y);

  144.             s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][3],

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

  146.                                              stride_y);

  147.             s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][4],

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

  149.                                              s->uvlinesize);

  150.             s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][5],

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

  152.                                              s->uvlinesize);

  153.         }

  154.     }

  155. 

  156. #define inc_blk_idx(idx) do { \

  157.         idx++; \

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

  159.             idx = 0; \

  160.     } while (0)

  161. 

  162.     inc_blk_idx(v->topleft_blk_idx);

  163.     inc_blk_idx(v->top_blk_idx);

  164.     inc_blk_idx(v->left_blk_idx);

  165.     inc_blk_idx(v->cur_blk_idx);

  166. }

  167. 

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

  169. {

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

  171.     int j;

  172.     if (!s->first_slice_line) {

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

  174.         if (s->mb_x)

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

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

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

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

  179.             if (s->mb_x)

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

  181.         }

  182.     }

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

  184. 

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

  186.         if (s->mb_x) {

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

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

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

  190.         }

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

  192.     }

  193. }

  194. 

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

  196. {

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

  198.     int j;

  199. 

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

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

  202.     if (!s->first_slice_line) {

  203.         if (s->mb_x) {

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

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

  206. 

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

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

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

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

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

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

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

  214.                     }

  215.                 }

  216.             }

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

  218.         }

  219. 

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

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

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

  223. 

  224.                 if (s->mb_x)

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

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

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

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

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

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

  231.                     }

  232.                 }

  233.             }

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

  235.         }

  236. 

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

  238.             if (s->mb_x) {

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

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

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

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

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

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

  245.                     }

  246.                 }

  247.             }

  248. 

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

  250.                 if (s->mb_x)

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

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

  253.                 if (s->mb_x) {

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

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

  256.                     }

  257.                 }

  258.             }

  259.         }

  260.     }

  261. }

  262. 

  263. static void vc1_smooth_overlap_filter_iblk(VC1Context *v)

  264. {

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

  266.     int mb_pos;

  267. 

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

  269.         return;

  270. 

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

  272. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  292.             }

  293.         }

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

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

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

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

  298. 

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

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

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

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

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

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

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

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

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

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

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

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

  311.                 }

  312.             }

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

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

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

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

  317.         }

  318.     }

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

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

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

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

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

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

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

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

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

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

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

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

  331.             }

  332.         }

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

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

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

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

  337.     }

  338. }

  339. 

  340. /** Do motion compensation over 1 macroblock

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

  342.  */

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

  344. {

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

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

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

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

  349.     int off, off_uv;

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

  351. 

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

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

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

  355.         return;

  356. 

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

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

  359. 

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

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

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

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

  364.     }

  365. 

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

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

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

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

  370. 

  371.     if (v->field_mode &&

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

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

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

  375.     }

  376. 

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

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

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

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

  381.     }

  382.     if (!dir) {

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

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

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

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

  387.         } else {

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

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

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

  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.     }

  397. 

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

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

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

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

  402. 

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

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

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

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

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

  408.     } else {

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

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

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

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

  413.     }

  414. 

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

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

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

  418. 

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

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

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

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

  423.     }

  424. 

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

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

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

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

  429.     }

  430. 

  431.     if (v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)

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

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

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

  435.         uint8_t *uvbuf = s->edge_emu_buffer + 19 * s->linesize;

  436. 

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

  438.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize,

  439.                                  17 + s->mspel * 2, 17 + s->mspel * 2,

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

  441.                                  s->h_edge_pos, v_edge_pos);

  442.         srcY = s->edge_emu_buffer;

  443.         s->vdsp.emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8 + 1, 8 + 1,

  444.                                  uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);

  445.         s->vdsp.emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8 + 1, 8 + 1,

  446.                                  uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);

  447.         srcU = uvbuf;

  448.         srcV = uvbuf + 16;

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

  450.         if (v->rangeredfrm) {

  451.             int i, j;

  452.             uint8_t *src, *src2;

  453. 

  454.             src = srcY;

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

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

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

  458.                 src += s->linesize;

  459.             }

  460.             src  = srcU;

  461.             src2 = srcV;

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

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

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

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

  466.                 }

  467.                 src  += s->uvlinesize;

  468.                 src2 += s->uvlinesize;

  469.             }

  470.         }

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

  472.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  473.             int i, j;

  474.             uint8_t *src, *src2;

  475. 

  476.             src = srcY;

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

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

  479.                     src[i] = v->luty[src[i]];

  480.                 src += s->linesize;

  481.             }

  482.             src  = srcU;

  483.             src2 = srcV;

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

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

  486.                     src[i]  = v->lutuv[src[i]];

  487.                     src2[i] = v->lutuv[src2[i]];

  488.                 }

  489.                 src  += s->uvlinesize;

  490.                 src2 += s->uvlinesize;

  491.             }

  492.         }

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

  494.     }

  495. 

  496.     off    = 0;

  497.     off_uv = 0;

  498.     if (s->mspel) {

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

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

  501.         v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8, srcY + 8, s->linesize, v->rnd);

  502.         srcY += s->linesize * 8;

  503.         v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  504.         v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

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

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

  507.         if (!v->rnd)

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

  509.         else

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

  511.     }

  512. 

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

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

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

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

  517.     if (!v->rnd) {

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

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

  520.     } else {

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

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

  523.     }

  524. }

  525. 

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

  527. {

  528.     if (a < b) {

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

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

  531.     } else {

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

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

  534.     }

  535. }

  536. 

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

  538.  */

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

  540. {

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

  542.     uint8_t *srcY;

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

  544.     int off;

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

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

  547. 

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

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

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

  551.         return;

  552. 

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

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

  555. 

  556.     if (!dir) {

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

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

  559.         } else

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

  561.     } else

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

  563. 

  564.     if (v->field_mode) {

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

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

  567.     }

  568. 

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

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

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

  572.         int tx, ty;

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

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

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

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

  577.             opp_count  += f;

  578.             same_count += 1 - f;

  579.         }

  580.         f = opp_count > same_count;

  581.         switch (f ? opp_count : same_count) {

  582.         case 4:

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

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

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

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

  587.             break;

  588.         case 3:

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

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

  591.             break;

  592.         case 2:

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

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

  595.             break;

  596.         }

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

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

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

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

  601.     }

  602. 

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

  604.         int qx, qy;

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

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

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

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

  609. 

  610.         if (qx < -17)

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

  612.         else if (qx > width)

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

  614.         if (qy < -18)

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

  616.         else if (qy > height + 1)

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

  618.     }

  619. 

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

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

  622.     else

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

  624. 

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

  626.     if (!fieldmv)

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

  628.     else

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

  630. 

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

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

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

  634.     } else {

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

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

  637.             if (src_y & 1)

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

  639.             else

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

  641.         } else {

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

  643.         }

  644.     }

  645. 

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

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

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

  649. 

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

  651.         v_edge_pos--;

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

  653.         src_y--;

  654.     if (v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)

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

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

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

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

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

  660.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize,

  661.                                  9 + s->mspel * 2, (9 + s->mspel * 2) << fieldmv,

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

  663.                                  s->h_edge_pos, v_edge_pos);

  664.         srcY = s->edge_emu_buffer;

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

  666.         if (v->rangeredfrm) {

  667.             int i, j;

  668.             uint8_t *src;

  669. 

  670.             src = srcY;

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

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

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

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

  675.             }

  676.         }

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

  678.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  679.             int i, j;

  680.             uint8_t *src;

  681. 

  682.             src = srcY;

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

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

  685.                     src[i] = v->luty[src[i]];

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

  687.             }

  688.         }

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

  690.     }

  691. 

  692.     if (s->mspel) {

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

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

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

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

  697.         if (!v->rnd)

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

  699.         else

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

  701.     }

  702. }

  703. 

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

  705. {

  706.     int idx, i;

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

  708. 

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

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

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

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

  713.     if (!idx) {

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

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

  716.         return 4;

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

  718.         switch (idx) {

  719.         case 0x1:

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

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

  722.             return 3;

  723.         case 0x2:

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

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

  726.             return 3;

  727.         case 0x4:

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

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

  730.             return 3;

  731.         case 0x8:

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

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

  734.             return 3;

  735.         }

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

  737.         int t1 = 0, t2 = 0;

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

  739.             if (!a[i]) {

  740.                 t1 = i;

  741.                 break;

  742.             }

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

  744.             if (!a[i]) {

  745.                 t2 = i;

  746.                 break;

  747.             }

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

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

  750.         return 2;

  751.     } else {

  752.         return 0;

  753.     }

  754.     return -1;

  755. }

  756. 

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

  758.  */

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

  760. {

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

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

  763.     uint8_t *srcU, *srcV;

  764.     int uvmx, uvmy, uvsrc_x, uvsrc_y;

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

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

  767.     int valid_count;

  768.     int chroma_ref_type = v->cur_field_type, off = 0;

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

  770. 

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

  772.         return;

  773.     if (s->flags & CODEC_FLAG_GRAY)

  774.         return;

  775. 

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

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

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

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

  780.         if (v->field_mode)

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

  782.     }

  783. 

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

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

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

  787.         chroma_ref_type = v->reffield;

  788.         if (!valid_count) {

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

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

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

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

  793.         }

  794.     } else {

  795.         int dominant = 0;

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

  797.             dominant = 1;

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

  799.         if (dominant)

  800.             chroma_ref_type = !v->cur_field_type;

  801.     }

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

  803.         return;

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

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

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

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

  808. 

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

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

  811. 

  812.     if (v->fastuvmc) {

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

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

  815.     }

  816.     // Field conversion bias

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

  818.         uvmy += 2 - 4 * chroma_ref_type;

  819. 

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

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

  822. 

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

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

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

  826.     } else {

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

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

  829.     }

  830. 

  831.     if (!dir) {

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

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

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

  835.         } else {

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

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

  838.         }

  839.     } else {

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

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

  842.     }

  843. 

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

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

  846. 

  847.     if (v->field_mode) {

  848.         if (chroma_ref_type) {

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

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

  851.         }

  852.         off = 0;

  853.     }

  854. 

  855.     if (v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)

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

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

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

  859.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer     , srcU, s->uvlinesize,

  860.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

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

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

  863.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

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

  865.         srcU = s->edge_emu_buffer;

  866.         srcV = s->edge_emu_buffer + 16;

  867. 

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

  869.         if (v->rangeredfrm) {

  870.             int i, j;

  871.             uint8_t *src, *src2;

  872. 

  873.             src  = srcU;

  874.             src2 = srcV;

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

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

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

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

  879.                 }

  880.                 src  += s->uvlinesize;

  881.                 src2 += s->uvlinesize;

  882.             }

  883.         }

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

  885.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  886.             int i, j;

  887.             uint8_t *src, *src2;

  888. 

  889.             src  = srcU;

  890.             src2 = srcV;

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

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

  893.                     src[i]  = v->lutuv[src[i]];

  894.                     src2[i] = v->lutuv[src2[i]];

  895.                 }

  896.                 src  += s->uvlinesize;

  897.                 src2 += s->uvlinesize;

  898.             }

  899.         }

  900.     }

  901. 

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

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

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

  905.     if (!v->rnd) {

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

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

  908.     } else {

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

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

  911.     }

  912. }

  913. 

  914. /** Do motion compensation for 4-MV field chroma macroblock (both U and V)

  915.  */

  916. static void vc1_mc_4mv_chroma4(VC1Context *v)

  917. {

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

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

  920.     uint8_t *srcU, *srcV;

  921.     int uvsrc_x, uvsrc_y;

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

  923.     int i, off, tx, ty;

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

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

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

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

  928. 

  929.     if (!v->s.last_picture.f.data[0])

  930.         return;

  931.     if (s->flags & CODEC_FLAG_GRAY)

  932.         return;

  933. 

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

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

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

  937.         ty = s->mv[0][i][1];

  938.         if (fieldmv)

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

  940.         else

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

  942.     }

  943. 

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

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

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

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

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

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

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

  951.         srcU = s->last_picture.f.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;

  952.         srcV = s->last_picture.f.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;

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

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

  955. 

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

  957.             v_edge_pos--;

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

  959.             uvsrc_y--;

  960.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP)

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

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

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

  964.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcU, s->uvlinesize,

  965.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,

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

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

  968.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,

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

  970.             srcU = s->edge_emu_buffer;

  971.             srcV = s->edge_emu_buffer + 16;

  972. 

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

  974.             if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  975.                 int i, j;

  976.                 uint8_t *src, *src2;

  977. 

  978.                 src  = srcU;

  979.                 src2 = srcV;

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

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

  982.                         src[i]  = v->lutuv[src[i]];

  983.                         src2[i] = v->lutuv[src2[i]];

  984.                     }

  985.                     src  += s->uvlinesize << 1;

  986.                     src2 += s->uvlinesize << 1;

  987.                 }

  988.             }

  989.         }

  990.         if (!v->rnd) {

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

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

  993.         } else {

  994.             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]);

  995.             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]);

  996.         }

  997.     }

  998. }

  999. 

  1000. /***********************************************************************/

  1001. /**

  1002.  * @name VC-1 Block-level functions

  1003.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1004.  * @{

  1005.  */

  1006. 

  1007. /**

  1008.  * @def GET_MQUANT

  1009.  * @brief Get macroblock-level quantizer scale

  1010.  */

  1011. #define GET_MQUANT()                                           \

  1012.     if (v->dquantfrm) {                                        \

  1013.         int edges = 0;                                         \

  1014.         if (v->dqprofile == DQPROFILE_ALL_MBS) {               \

  1015.             if (v->dqbilevel) {                                \

  1016.                 mquant = (get_bits1(gb)) ? v->altpq : v->pq;   \

  1017.             } else {                                           \

  1018.                 mqdiff = get_bits(gb, 3);                      \

  1019.                 if (mqdiff != 7)                               \

  1020.                     mquant = v->pq + mqdiff;                   \

  1021.                 else                                           \

  1022.                     mquant = get_bits(gb, 5);                  \

  1023.             }                                                  \

  1024.         }                                                      \

  1025.         if (v->dqprofile == DQPROFILE_SINGLE_EDGE)             \

  1026.             edges = 1 << v->dqsbedge;                          \

  1027.         else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES)       \

  1028.             edges = (3 << v->dqsbedge) % 15;                   \

  1029.         else if (v->dqprofile == DQPROFILE_FOUR_EDGES)         \

  1030.             edges = 15;                                        \

  1031.         if ((edges&1) && !s->mb_x)                             \

  1032.             mquant = v->altpq;                                 \

  1033.         if ((edges&2) && s->first_slice_line)                  \

  1034.             mquant = v->altpq;                                 \

  1035.         if ((edges&4) && s->mb_x == (s->mb_width - 1))         \

  1036.             mquant = v->altpq;                                 \

  1037.         if ((edges&8) && s->mb_y == (s->mb_height - 1))        \

  1038.             mquant = v->altpq;                                 \

  1039.         if (!mquant || mquant > 31) {                          \

  1040.             av_log(v->s.avctx, AV_LOG_ERROR,                   \

  1041.                    "Overriding invalid mquant %d\n", mquant);  \

  1042.             mquant = 1;                                        \

  1043.         }                                                      \

  1044.     }

  1045. 

  1046. /**

  1047.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1048.  * @brief Get MV differentials

  1049.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1050.  * @param _dmv_x Horizontal differential for decoded MV

  1051.  * @param _dmv_y Vertical differential for decoded MV

  1052.  */

  1053. #define GET_MVDATA(_dmv_x, _dmv_y)                                      \

  1054.     index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \

  1055.                          VC1_MV_DIFF_VLC_BITS, 2);                      \

  1056.     if (index > 36) {                                                   \

  1057.         mb_has_coeffs = 1;                                              \

  1058.         index -= 37;                                                    \

  1059.     } else                                                              \

  1060.         mb_has_coeffs = 0;                                              \

  1061.     s->mb_intra = 0;                                                    \

  1062.     if (!index) {                                                       \

  1063.         _dmv_x = _dmv_y = 0;                                            \

  1064.     } else if (index == 35) {                                           \

  1065.         _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1066.         _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1067.     } else if (index == 36) {                                           \

  1068.         _dmv_x = 0;                                                     \

  1069.         _dmv_y = 0;                                                     \

  1070.         s->mb_intra = 1;                                                \

  1071.     } else {                                                            \

  1072.         index1 = index % 6;                                             \

  1073.         if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1074.         else                                   val = 0;                 \

  1075.         if (size_table[index1] - val > 0)                               \

  1076.             val = get_bits(gb, size_table[index1] - val);               \

  1077.         else                                   val = 0;                 \

  1078.         sign = 0 - (val&1);                                             \

  1079.         _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1080.                                                                         \

  1081.         index1 = index / 6;                                             \

  1082.         if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1083.         else                                   val = 0;                 \

  1084.         if (size_table[index1] - val > 0)                               \

  1085.             val = get_bits(gb, size_table[index1] - val);               \

  1086.         else                                   val = 0;                 \

  1087.         sign = 0 - (val & 1);                                           \

  1088.         _dmv_y = (sign ^ ((val >> 1) + offset_table[index1])) - sign;   \

  1089.     }

  1090. 

  1091. static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,

  1092.                                                    int *dmv_y, int *pred_flag)

  1093. {

  1094.     int index, index1;

  1095.     int extend_x = 0, extend_y = 0;

  1096.     GetBitContext *gb = &v->s.gb;

  1097.     int bits, esc;

  1098.     int val, sign;

  1099.     const int* offs_tab;

  1100. 

  1101.     if (v->numref) {

  1102.         bits = VC1_2REF_MVDATA_VLC_BITS;

  1103.         esc  = 125;

  1104.     } else {

  1105.         bits = VC1_1REF_MVDATA_VLC_BITS;

  1106.         esc  = 71;

  1107.     }

  1108.     switch (v->dmvrange) {

  1109.     case 1:

  1110.         extend_x = 1;

  1111.         break;

  1112.     case 2:

  1113.         extend_y = 1;

  1114.         break;

  1115.     case 3:

  1116.         extend_x = extend_y = 1;

  1117.         break;

  1118.     }

  1119.     index = get_vlc2(gb, v->imv_vlc->table, bits, 3);

  1120.     if (index == esc) {

  1121.         *dmv_x = get_bits(gb, v->k_x);

  1122.         *dmv_y = get_bits(gb, v->k_y);

  1123.         if (v->numref) {

  1124.             if (pred_flag) {

  1125.                 *pred_flag = *dmv_y & 1;

  1126.                 *dmv_y     = (*dmv_y + *pred_flag) >> 1;

  1127.             } else {

  1128.                 *dmv_y     = (*dmv_y + (*dmv_y & 1)) >> 1;

  1129.             }

  1130.         }

  1131.     }

  1132.     else {

  1133.         if (extend_x)

  1134.             offs_tab = offset_table2;

  1135.         else

  1136.             offs_tab = offset_table1;

  1137.         index1 = (index + 1) % 9;

  1138.         if (index1 != 0) {

  1139.             val    = get_bits(gb, index1 + extend_x);

  1140.             sign   = 0 -(val & 1);

  1141.             *dmv_x = (sign ^ ((val >> 1) + offs_tab[index1])) - sign;

  1142.         } else

  1143.             *dmv_x = 0;

  1144.         if (extend_y)

  1145.             offs_tab = offset_table2;

  1146.         else

  1147.             offs_tab = offset_table1;

  1148.         index1 = (index + 1) / 9;

  1149.         if (index1 > v->numref) {

  1150.             val    = get_bits(gb, (index1 + (extend_y << v->numref)) >> v->numref);

  1151.             sign   = 0 - (val & 1);

  1152.             *dmv_y = (sign ^ ((val >> 1) + offs_tab[index1 >> v->numref])) - sign;

  1153.         } else

  1154.             *dmv_y = 0;

  1155.         if (v->numref && pred_flag)

  1156.             *pred_flag = index1 & 1;

  1157.     }

  1158. }

  1159. 

  1160. static av_always_inline int scaleforsame_x(VC1Context *v, int n /* MV */, int dir)

  1161. {

  1162.     int scaledvalue, refdist;

  1163.     int scalesame1, scalesame2;

  1164.     int scalezone1_x, zone1offset_x;

  1165.     int table_index = dir ^ v->second_field;

  1166. 

  1167.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1168.         refdist = v->refdist;

  1169.     else

  1170.         refdist = dir ? v->brfd : v->frfd;

  1171.     if (refdist > 3)

  1172.         refdist = 3;

  1173.     scalesame1    = ff_vc1_field_mvpred_scales[table_index][1][refdist];

  1174.     scalesame2    = ff_vc1_field_mvpred_scales[table_index][2][refdist];

  1175.     scalezone1_x  = ff_vc1_field_mvpred_scales[table_index][3][refdist];

  1176.     zone1offset_x = ff_vc1_field_mvpred_scales[table_index][5][refdist];

  1177. 

  1178.     if (FFABS(n) > 255)

  1179.         scaledvalue = n;

  1180.     else {

  1181.         if (FFABS(n) < scalezone1_x)

  1182.             scaledvalue = (n * scalesame1) >> 8;

  1183.         else {

  1184.             if (n < 0)

  1185.                 scaledvalue = ((n * scalesame2) >> 8) - zone1offset_x;

  1186.             else

  1187.                 scaledvalue = ((n * scalesame2) >> 8) + zone1offset_x;

  1188.         }

  1189.     }

  1190.     return av_clip(scaledvalue, -v->range_x, v->range_x - 1);

  1191. }

  1192. 

  1193. static av_always_inline int scaleforsame_y(VC1Context *v, int i, int n /* MV */, int dir)

  1194. {

  1195.     int scaledvalue, refdist;

  1196.     int scalesame1, scalesame2;

  1197.     int scalezone1_y, zone1offset_y;

  1198.     int table_index = dir ^ v->second_field;

  1199. 

  1200.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1201.         refdist = v->refdist;

  1202.     else

  1203.         refdist = dir ? v->brfd : v->frfd;

  1204.     if (refdist > 3)

  1205.         refdist = 3;

  1206.     scalesame1    = ff_vc1_field_mvpred_scales[table_index][1][refdist];

  1207.     scalesame2    = ff_vc1_field_mvpred_scales[table_index][2][refdist];

  1208.     scalezone1_y  = ff_vc1_field_mvpred_scales[table_index][4][refdist];

  1209.     zone1offset_y = ff_vc1_field_mvpred_scales[table_index][6][refdist];

  1210. 

  1211.     if (FFABS(n) > 63)

  1212.         scaledvalue = n;

  1213.     else {

  1214.         if (FFABS(n) < scalezone1_y)

  1215.             scaledvalue = (n * scalesame1) >> 8;

  1216.         else {

  1217.             if (n < 0)

  1218.                 scaledvalue = ((n * scalesame2) >> 8) - zone1offset_y;

  1219.             else

  1220.                 scaledvalue = ((n * scalesame2) >> 8) + zone1offset_y;

  1221.         }

  1222.     }

  1223. 

  1224.     if (v->cur_field_type && !v->ref_field_type[dir])

  1225.         return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);

  1226.     else

  1227.         return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);

  1228. }

  1229. 

  1230. static av_always_inline int scaleforopp_x(VC1Context *v, int n /* MV */)

  1231. {

  1232.     int scalezone1_x, zone1offset_x;

  1233.     int scaleopp1, scaleopp2, brfd;

  1234.     int scaledvalue;

  1235. 

  1236.     brfd = FFMIN(v->brfd, 3);

  1237.     scalezone1_x  = ff_vc1_b_field_mvpred_scales[3][brfd];

  1238.     zone1offset_x = ff_vc1_b_field_mvpred_scales[5][brfd];

  1239.     scaleopp1     = ff_vc1_b_field_mvpred_scales[1][brfd];

  1240.     scaleopp2     = ff_vc1_b_field_mvpred_scales[2][brfd];

  1241. 

  1242.     if (FFABS(n) > 255)

  1243.         scaledvalue = n;

  1244.     else {

  1245.         if (FFABS(n) < scalezone1_x)

  1246.             scaledvalue = (n * scaleopp1) >> 8;

  1247.         else {

  1248.             if (n < 0)

  1249.                 scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_x;

  1250.             else

  1251.                 scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_x;

  1252.         }

  1253.     }

  1254.     return av_clip(scaledvalue, -v->range_x, v->range_x - 1);

  1255. }

  1256. 

  1257. static av_always_inline int scaleforopp_y(VC1Context *v, int n /* MV */, int dir)

  1258. {

  1259.     int scalezone1_y, zone1offset_y;

  1260.     int scaleopp1, scaleopp2, brfd;

  1261.     int scaledvalue;

  1262. 

  1263.     brfd = FFMIN(v->brfd, 3);

  1264.     scalezone1_y  = ff_vc1_b_field_mvpred_scales[4][brfd];

  1265.     zone1offset_y = ff_vc1_b_field_mvpred_scales[6][brfd];

  1266.     scaleopp1     = ff_vc1_b_field_mvpred_scales[1][brfd];

  1267.     scaleopp2     = ff_vc1_b_field_mvpred_scales[2][brfd];

  1268. 

  1269.     if (FFABS(n) > 63)

  1270.         scaledvalue = n;

  1271.     else {

  1272.         if (FFABS(n) < scalezone1_y)

  1273.             scaledvalue = (n * scaleopp1) >> 8;

  1274.         else {

  1275.             if (n < 0)

  1276.                 scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_y;

  1277.             else

  1278.                 scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_y;

  1279.         }

  1280.     }

  1281.     if (v->cur_field_type && !v->ref_field_type[dir]) {

  1282.         return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);

  1283.     } else {

  1284.         return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);

  1285.     }

  1286. }

  1287. 

  1288. static av_always_inline int scaleforsame(VC1Context *v, int i, int n /* MV */,

  1289.                                          int dim, int dir)

  1290. {

  1291.     int brfd, scalesame;

  1292.     int hpel = 1 - v->s.quarter_sample;

  1293. 

  1294.     n >>= hpel;

  1295.     if (v->s.pict_type != AV_PICTURE_TYPE_B || v->second_field || !dir) {

  1296.         if (dim)

  1297.             n = scaleforsame_y(v, i, n, dir) << hpel;

  1298.         else

  1299.             n = scaleforsame_x(v, n, dir) << hpel;

  1300.         return n;

  1301.     }

  1302.     brfd      = FFMIN(v->brfd, 3);

  1303.     scalesame = ff_vc1_b_field_mvpred_scales[0][brfd];

  1304. 

  1305.     n = (n * scalesame >> 8) << hpel;

  1306.     return n;

  1307. }

  1308. 

  1309. static av_always_inline int scaleforopp(VC1Context *v, int n /* MV */,

  1310.                                         int dim, int dir)

  1311. {

  1312.     int refdist, scaleopp;

  1313.     int hpel = 1 - v->s.quarter_sample;

  1314. 

  1315.     n >>= hpel;

  1316.     if (v->s.pict_type == AV_PICTURE_TYPE_B && !v->second_field && dir == 1) {

  1317.         if (dim)

  1318.             n = scaleforopp_y(v, n, dir) << hpel;

  1319.         else

  1320.             n = scaleforopp_x(v, n) << hpel;

  1321.         return n;

  1322.     }

  1323.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1324.         refdist = FFMIN(v->refdist, 3);

  1325.     else

  1326.         refdist = dir ? v->brfd : v->frfd;

  1327.     scaleopp = ff_vc1_field_mvpred_scales[dir ^ v->second_field][0][refdist];

  1328. 

  1329.     n = (n * scaleopp >> 8) << hpel;

  1330.     return n;

  1331. }

  1332. 

  1333. /** Predict and set motion vector

  1334.  */

  1335. static inline void vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y,

  1336.                                int mv1, int r_x, int r_y, uint8_t* is_intra,

  1337.                                int pred_flag, int dir)

  1338. {

  1339.     MpegEncContext *s = &v->s;

  1340.     int xy, wrap, off = 0;

  1341.     int16_t *A, *B, *C;

  1342.     int px, py;

  1343.     int sum;

  1344.     int mixedmv_pic, num_samefield = 0, num_oppfield = 0;

  1345.     int opposite, a_f, b_f, c_f;

  1346.     int16_t field_predA[2];

  1347.     int16_t field_predB[2];

  1348.     int16_t field_predC[2];

  1349.     int a_valid, b_valid, c_valid;

  1350.     int hybridmv_thresh, y_bias = 0;

  1351. 

  1352.     if (v->mv_mode == MV_PMODE_MIXED_MV ||

  1353.         ((v->mv_mode == MV_PMODE_INTENSITY_COMP) && (v->mv_mode2 == MV_PMODE_MIXED_MV)))

  1354.         mixedmv_pic = 1;

  1355.     else

  1356.         mixedmv_pic = 0;

  1357.     /* scale MV difference to be quad-pel */

  1358.     dmv_x <<= 1 - s->quarter_sample;

  1359.     dmv_y <<= 1 - s->quarter_sample;

  1360. 

  1361.     wrap = s->b8_stride;

  1362.     xy   = s->block_index[n];

  1363. 

  1364.     if (s->mb_intra) {

  1365.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy + v->blocks_off][0] = 0;

  1366.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy + v->blocks_off][1] = 0;

  1367.         s->current_picture.motion_val[1][xy + v->blocks_off][0] = 0;

  1368.         s->current_picture.motion_val[1][xy + v->blocks_off][1] = 0;

  1369.         if (mv1) { /* duplicate motion data for 1-MV block */

  1370.             s->current_picture.motion_val[0][xy + 1 + v->blocks_off][0]        = 0;

  1371.             s->current_picture.motion_val[0][xy + 1 + v->blocks_off][1]        = 0;

  1372.             s->current_picture.motion_val[0][xy + wrap + v->blocks_off][0]     = 0;

  1373.             s->current_picture.motion_val[0][xy + wrap + v->blocks_off][1]     = 0;

  1374.             s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][0] = 0;

  1375.             s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][1] = 0;

  1376.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  1377.             s->current_picture.motion_val[1][xy + 1 + v->blocks_off][0]        = 0;

  1378.             s->current_picture.motion_val[1][xy + 1 + v->blocks_off][1]        = 0;

  1379.             s->current_picture.motion_val[1][xy + wrap][0]                     = 0;

  1380.             s->current_picture.motion_val[1][xy + wrap + v->blocks_off][1]     = 0;

  1381.             s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][0] = 0;

  1382.             s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][1] = 0;

  1383.         }

  1384.         return;

  1385.     }

  1386. 

  1387.     C = s->current_picture.motion_val[dir][xy -    1 + v->blocks_off];

  1388.     A = s->current_picture.motion_val[dir][xy - wrap + v->blocks_off];

  1389.     if (mv1) {

  1390.         if (v->field_mode && mixedmv_pic)

  1391.             off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1392.         else

  1393.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1394.     } else {

  1395.         //in 4-MV mode different blocks have different B predictor position

  1396.         switch (n) {

  1397.         case 0:

  1398.             off = (s->mb_x > 0) ? -1 : 1;

  1399.             break;

  1400.         case 1:

  1401.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1402.             break;

  1403.         case 2:

  1404.             off = 1;

  1405.             break;

  1406.         case 3:

  1407.             off = -1;

  1408.         }

  1409.     }

  1410.     B = s->current_picture.motion_val[dir][xy - wrap + off + v->blocks_off];

  1411. 

  1412.     a_valid = !s->first_slice_line || (n == 2 || n == 3);

  1413.     b_valid = a_valid && (s->mb_width > 1);

  1414.     c_valid = s->mb_x || (n == 1 || n == 3);

  1415.     if (v->field_mode) {

  1416.         a_valid = a_valid && !is_intra[xy - wrap];

  1417.         b_valid = b_valid && !is_intra[xy - wrap + off];

  1418.         c_valid = c_valid && !is_intra[xy - 1];

  1419.     }

  1420. 

  1421.     if (a_valid) {

  1422.         a_f = v->mv_f[dir][xy - wrap + v->blocks_off];

  1423.         num_oppfield  += a_f;

  1424.         num_samefield += 1 - a_f;

  1425.         field_predA[0] = A[0];

  1426.         field_predA[1] = A[1];

  1427.     } else {

  1428.         field_predA[0] = field_predA[1] = 0;

  1429.         a_f = 0;

  1430.     }

  1431.     if (b_valid) {

  1432.         b_f = v->mv_f[dir][xy - wrap + off + v->blocks_off];

  1433.         num_oppfield  += b_f;

  1434.         num_samefield += 1 - b_f;

  1435.         field_predB[0] = B[0];

  1436.         field_predB[1] = B[1];

  1437.     } else {

  1438.         field_predB[0] = field_predB[1] = 0;

  1439.         b_f = 0;

  1440.     }

  1441.     if (c_valid) {

  1442.         c_f = v->mv_f[dir][xy - 1 + v->blocks_off];

  1443.         num_oppfield  += c_f;

  1444.         num_samefield += 1 - c_f;

  1445.         field_predC[0] = C[0];

  1446.         field_predC[1] = C[1];

  1447.     } else {

  1448.         field_predC[0] = field_predC[1] = 0;

  1449.         c_f = 0;

  1450.     }

  1451. 

  1452.     if (v->field_mode) {

  1453.         if (!v->numref)

  1454.             // REFFIELD determines if the last field or the second-last field is

  1455.             // to be used as reference

  1456.             opposite = 1 - v->reffield;

  1457.         else {

  1458.             if (num_samefield <= num_oppfield)

  1459.                 opposite = 1 - pred_flag;

  1460.             else

  1461.                 opposite = pred_flag;

  1462.         }

  1463.     } else

  1464.         opposite = 0;

  1465.     if (opposite) {

  1466.         if (a_valid && !a_f) {

  1467.             field_predA[0] = scaleforopp(v, field_predA[0], 0, dir);

  1468.             field_predA[1] = scaleforopp(v, field_predA[1], 1, dir);

  1469.         }

  1470.         if (b_valid && !b_f) {

  1471.             field_predB[0] = scaleforopp(v, field_predB[0], 0, dir);

  1472.             field_predB[1] = scaleforopp(v, field_predB[1], 1, dir);

  1473.         }

  1474.         if (c_valid && !c_f) {

  1475.             field_predC[0] = scaleforopp(v, field_predC[0], 0, dir);

  1476.             field_predC[1] = scaleforopp(v, field_predC[1], 1, dir);

  1477.         }

  1478.         v->mv_f[dir][xy + v->blocks_off] = 1;

  1479.         v->ref_field_type[dir] = !v->cur_field_type;

  1480.     } else {

  1481.         if (a_valid && a_f) {

  1482.             field_predA[0] = scaleforsame(v, n, field_predA[0], 0, dir);

  1483.             field_predA[1] = scaleforsame(v, n, field_predA[1], 1, dir);

  1484.         }

  1485.         if (b_valid && b_f) {

  1486.             field_predB[0] = scaleforsame(v, n, field_predB[0], 0, dir);

  1487.             field_predB[1] = scaleforsame(v, n, field_predB[1], 1, dir);

  1488.         }

  1489.         if (c_valid && c_f) {

  1490.             field_predC[0] = scaleforsame(v, n, field_predC[0], 0, dir);

  1491.             field_predC[1] = scaleforsame(v, n, field_predC[1], 1, dir);

  1492.         }

  1493.         v->mv_f[dir][xy + v->blocks_off] = 0;

  1494.         v->ref_field_type[dir] = v->cur_field_type;

  1495.     }

  1496. 

  1497.     if (a_valid) {

  1498.         px = field_predA[0];

  1499.         py = field_predA[1];

  1500.     } else if (c_valid) {

  1501.         px = field_predC[0];

  1502.         py = field_predC[1];

  1503.     } else if (b_valid) {

  1504.         px = field_predB[0];

  1505.         py = field_predB[1];

  1506.     } else {

  1507.         px = 0;

  1508.         py = 0;

  1509.     }

  1510. 

  1511.     if (num_samefield + num_oppfield > 1) {

  1512.         px = mid_pred(field_predA[0], field_predB[0], field_predC[0]);

  1513.         py = mid_pred(field_predA[1], field_predB[1], field_predC[1]);

  1514.     }

  1515. 

  1516.     /* Pullback MV as specified in 8.3.5.3.4 */

  1517.     if (!v->field_mode) {

  1518.         int qx, qy, X, Y;

  1519.         qx = (s->mb_x << 6) + ((n == 1 || n == 3) ? 32 : 0);

  1520.         qy = (s->mb_y << 6) + ((n == 2 || n == 3) ? 32 : 0);

  1521.         X  = (s->mb_width  << 6) - 4;

  1522.         Y  = (s->mb_height << 6) - 4;

  1523.         if (mv1) {

  1524.             if (qx + px < -60) px = -60 - qx;

  1525.             if (qy + py < -60) py = -60 - qy;

  1526.         } else {

  1527.             if (qx + px < -28) px = -28 - qx;

  1528.             if (qy + py < -28) py = -28 - qy;

  1529.         }

  1530.         if (qx + px > X) px = X - qx;

  1531.         if (qy + py > Y) py = Y - qy;

  1532.     }

  1533. 

  1534.     if (!v->field_mode || s->pict_type != AV_PICTURE_TYPE_B) {

  1535.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 (also 10.3.5.4.3.5) */

  1536.         hybridmv_thresh = 32;

  1537.         if (a_valid && c_valid) {

  1538.             if (is_intra[xy - wrap])

  1539.                 sum = FFABS(px) + FFABS(py);

  1540.             else

  1541.                 sum = FFABS(px - field_predA[0]) + FFABS(py - field_predA[1]);

  1542.             if (sum > hybridmv_thresh) {

  1543.                 if (get_bits1(&s->gb)) {     // read HYBRIDPRED bit

  1544.                     px = field_predA[0];

  1545.                     py = field_predA[1];

  1546.                 } else {

  1547.                     px = field_predC[0];

  1548.                     py = field_predC[1];

  1549.                 }

  1550.             } else {

  1551.                 if (is_intra[xy - 1])

  1552.                     sum = FFABS(px) + FFABS(py);

  1553.                 else

  1554.                     sum = FFABS(px - field_predC[0]) + FFABS(py - field_predC[1]);

  1555.                 if (sum > hybridmv_thresh) {

  1556.                     if (get_bits1(&s->gb)) {

  1557.                         px = field_predA[0];

  1558.                         py = field_predA[1];

  1559.                     } else {

  1560.                         px = field_predC[0];

  1561.                         py = field_predC[1];

  1562.                     }

  1563.                 }

  1564.             }

  1565.         }

  1566.     }

  1567. 

  1568.     if (v->field_mode && v->numref)

  1569.         r_y >>= 1;

  1570.     if (v->field_mode && v->cur_field_type && v->ref_field_type[dir] == 0)

  1571.         y_bias = 1;

  1572.     /* store MV using signed modulus of MV range defined in 4.11 */

  1573.     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;

  1574.     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;

  1575.     if (mv1) { /* duplicate motion data for 1-MV block */

  1576.         s->current_picture.motion_val[dir][xy +    1 +     v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];

  1577.         s->current_picture.motion_val[dir][xy +    1 +     v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];

  1578.         s->current_picture.motion_val[dir][xy + wrap +     v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];

  1579.         s->current_picture.motion_val[dir][xy + wrap +     v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];

  1580.         s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];

  1581.         s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];

  1582.         v->mv_f[dir][xy +    1 + v->blocks_off] = v->mv_f[dir][xy +            v->blocks_off];

  1583.         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];

  1584.     }

  1585. }

  1586. 

  1587. /** Predict and set motion vector for interlaced frame picture MBs

  1588.  */

  1589. static inline void vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,

  1590.                                      int mvn, int r_x, int r_y, uint8_t* is_intra)

  1591. {

  1592.     MpegEncContext *s = &v->s;

  1593.     int xy, wrap, off = 0;

  1594.     int A[2], B[2], C[2];

  1595.     int px, py;

  1596.     int a_valid = 0, b_valid = 0, c_valid = 0;

  1597.     int field_a, field_b, field_c; // 0: same, 1: opposit

  1598.     int total_valid, num_samefield, num_oppfield;

  1599.     int pos_c, pos_b, n_adj;

  1600. 

  1601.     wrap = s->b8_stride;

  1602.     xy = s->block_index[n];

  1603. 

  1604.     if (s->mb_intra) {

  1605.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1606.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

  1607.         s->current_picture.motion_val[1][xy][0] = 0;

  1608.         s->current_picture.motion_val[1][xy][1] = 0;

  1609.         if (mvn == 1) { /* duplicate motion data for 1-MV block */

  1610.             s->current_picture.motion_val[0][xy + 1][0]        = 0;

  1611.             s->current_picture.motion_val[0][xy + 1][1]        = 0;

  1612.             s->current_picture.motion_val[0][xy + wrap][0]     = 0;

  1613.             s->current_picture.motion_val[0][xy + wrap][1]     = 0;

  1614.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  1615.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  1616.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  1617.             s->current_picture.motion_val[1][xy + 1][0]        = 0;

  1618.             s->current_picture.motion_val[1][xy + 1][1]        = 0;

  1619.             s->current_picture.motion_val[1][xy + wrap][0]     = 0;

  1620.             s->current_picture.motion_val[1][xy + wrap][1]     = 0;

  1621.             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;

  1622.             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;

  1623.         }

  1624.         return;

  1625.     }

  1626. 

  1627.     off = ((n == 0) || (n == 1)) ? 1 : -1;

  1628.     /* predict A */

  1629.     if (s->mb_x || (n == 1) || (n == 3)) {

  1630.         if ((v->blk_mv_type[xy]) // current block (MB) has a field MV

  1631.             || (!v->blk_mv_type[xy] && !v->blk_mv_type[xy - 1])) { // or both have frame MV

  1632.             A[0] = s->current_picture.motion_val[0][xy - 1][0];

  1633.             A[1] = s->current_picture.motion_val[0][xy - 1][1];

  1634.             a_valid = 1;

  1635.         } else { // current block has frame mv and cand. has field MV (so average)

  1636.             A[0] = (s->current_picture.motion_val[0][xy - 1][0]

  1637.                     + s->current_picture.motion_val[0][xy - 1 + off * wrap][0] + 1) >> 1;

  1638.             A[1] = (s->current_picture.motion_val[0][xy - 1][1]

  1639.                     + s->current_picture.motion_val[0][xy - 1 + off * wrap][1] + 1) >> 1;

  1640.             a_valid = 1;

  1641.         }

  1642.         if (!(n & 1) && v->is_intra[s->mb_x - 1]) {

  1643.             a_valid = 0;

  1644.             A[0] = A[1] = 0;

  1645.         }

  1646.     } else

  1647.         A[0] = A[1] = 0;

  1648.     /* Predict B and C */

  1649.     B[0] = B[1] = C[0] = C[1] = 0;

  1650.     if (n == 0 || n == 1 || v->blk_mv_type[xy]) {

  1651.         if (!s->first_slice_line) {

  1652.             if (!v->is_intra[s->mb_x - s->mb_stride]) {

  1653.                 b_valid = 1;

  1654.                 n_adj   = n | 2;

  1655.                 pos_b   = s->block_index[n_adj] - 2 * wrap;

  1656.                 if (v->blk_mv_type[pos_b] && v->blk_mv_type[xy]) {

  1657.                     n_adj = (n & 2) | (n & 1);

  1658.                 }

  1659.                 B[0] = s->current_picture.motion_val[0][s->block_index[n_adj] - 2 * wrap][0];

  1660.                 B[1] = s->current_picture.motion_val[0][s->block_index[n_adj] - 2 * wrap][1];

  1661.                 if (v->blk_mv_type[pos_b] && !v->blk_mv_type[xy]) {

  1662.                     B[0] = (B[0] + s->current_picture.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap][0] + 1) >> 1;

  1663.                     B[1] = (B[1] + s->current_picture.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap][1] + 1) >> 1;

  1664.                 }

  1665.             }

  1666.             if (s->mb_width > 1) {

  1667.                 if (!v->is_intra[s->mb_x - s->mb_stride + 1]) {

  1668.                     c_valid = 1;

  1669.                     n_adj   = 2;

  1670.                     pos_c   = s->block_index[2] - 2 * wrap + 2;

  1671.                     if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {

  1672.                         n_adj = n & 2;

  1673.                     }

  1674.                     C[0] = s->current_picture.motion_val[0][s->block_index[n_adj] - 2 * wrap + 2][0];

  1675.                     C[1] = s->current_picture.motion_val[0][s->block_index[n_adj] - 2 * wrap + 2][1];

  1676.                     if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {

  1677.                         C[0] = (1 + C[0] + (s->current_picture.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap + 2][0])) >> 1;

  1678.                         C[1] = (1 + C[1] + (s->current_picture.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap + 2][1])) >> 1;

  1679.                     }

  1680.                     if (s->mb_x == s->mb_width - 1) {

  1681.                         if (!v->is_intra[s->mb_x - s->mb_stride - 1]) {

  1682.                             c_valid = 1;

  1683.                             n_adj   = 3;

  1684.                             pos_c   = s->block_index[3] - 2 * wrap - 2;

  1685.                             if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {

  1686.                                 n_adj = n | 1;

  1687.                             }

  1688.                             C[0] = s->current_picture.motion_val[0][s->block_index[n_adj] - 2 * wrap - 2][0];

  1689.                             C[1] = s->current_picture.motion_val[0][s->block_index[n_adj] - 2 * wrap - 2][1];

  1690.                             if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {

  1691.                                 C[0] = (1 + C[0] + s->current_picture.motion_val[0][s->block_index[1] - 2 * wrap - 2][0]) >> 1;

  1692.                                 C[1] = (1 + C[1] + s->current_picture.motion_val[0][s->block_index[1] - 2 * wrap - 2][1]) >> 1;

  1693.                             }

  1694.                         } else

  1695.                             c_valid = 0;

  1696.                     }

  1697.                 }

  1698.             }

  1699.         }

  1700.     } else {

  1701.         pos_b   = s->block_index[1];

  1702.         b_valid = 1;

  1703.         B[0]    = s->current_picture.motion_val[0][pos_b][0];

  1704.         B[1]    = s->current_picture.motion_val[0][pos_b][1];

  1705.         pos_c   = s->block_index[0];

  1706.         c_valid = 1;

  1707.         C[0]    = s->current_picture.motion_val[0][pos_c][0];

  1708.         C[1]    = s->current_picture.motion_val[0][pos_c][1];

  1709.     }

  1710. 

  1711.     total_valid = a_valid + b_valid + c_valid;

  1712.     // check if predictor A is out of bounds

  1713.     if (!s->mb_x && !(n == 1 || n == 3)) {

  1714.         A[0] = A[1] = 0;

  1715.     }

  1716.     // check if predictor B is out of bounds

  1717.     if ((s->first_slice_line && v->blk_mv_type[xy]) || (s->first_slice_line && !(n & 2))) {

  1718.         B[0] = B[1] = C[0] = C[1] = 0;

  1719.     }

  1720.     if (!v->blk_mv_type[xy]) {

  1721.         if (s->mb_width == 1) {

  1722.             px = B[0];

  1723.             py = B[1];

  1724.         } else {

  1725.             if (total_valid >= 2) {

  1726.                 px = mid_pred(A[0], B[0], C[0]);

  1727.                 py = mid_pred(A[1], B[1], C[1]);

  1728.             } else if (total_valid) {

  1729.                 if (a_valid) { px = A[0]; py = A[1]; }

  1730.                 if (b_valid) { px = B[0]; py = B[1]; }

  1731.                 if (c_valid) { px = C[0]; py = C[1]; }

  1732.             } else

  1733.                 px = py = 0;

  1734.         }

  1735.     } else {

  1736.         if (a_valid)

  1737.             field_a = (A[1] & 4) ? 1 : 0;

  1738.         else

  1739.             field_a = 0;

  1740.         if (b_valid)

  1741.             field_b = (B[1] & 4) ? 1 : 0;

  1742.         else

  1743.             field_b = 0;

  1744.         if (c_valid)

  1745.             field_c = (C[1] & 4) ? 1 : 0;

  1746.         else

  1747.             field_c = 0;

  1748. 

  1749.         num_oppfield  = field_a + field_b + field_c;

  1750.         num_samefield = total_valid - num_oppfield;

  1751.         if (total_valid == 3) {

  1752.             if ((num_samefield == 3) || (num_oppfield == 3)) {

  1753.                 px = mid_pred(A[0], B[0], C[0]);

  1754.                 py = mid_pred(A[1], B[1], C[1]);

  1755.             } else if (num_samefield >= num_oppfield) {

  1756.                 /* take one MV from same field set depending on priority

  1757.                 the check for B may not be necessary */

  1758.                 px = !field_a ? A[0] : B[0];

  1759.                 py = !field_a ? A[1] : B[1];

  1760.             } else {

  1761.                 px =  field_a ? A[0] : B[0];

  1762.                 py =  field_a ? A[1] : B[1];

  1763.             }

  1764.         } else if (total_valid == 2) {

  1765.             if (num_samefield >= num_oppfield) {

  1766.                 if (!field_a && a_valid) {

  1767.                     px = A[0];

  1768.                     py = A[1];

  1769.                 } else if (!field_b && b_valid) {

  1770.                     px = B[0];

  1771.                     py = B[1];

  1772.                 } else if (c_valid) {

  1773.                     px = C[0];

  1774.                     py = C[1];

  1775.                 } else px = py = 0;

  1776.             } else {

  1777.                 if (field_a && a_valid) {

  1778.                     px = A[0];

  1779.                     py = A[1];

  1780.                 } else if (field_b && b_valid) {

  1781.                     px = B[0];

  1782.                     py = B[1];

  1783.                 } else if (c_valid) {

  1784.                     px = C[0];

  1785.                     py = C[1];

  1786.                 }

  1787.             }

  1788.         } else if (total_valid == 1) {

  1789.             px = (a_valid) ? A[0] : ((b_valid) ? B[0] : C[0]);

  1790.             py = (a_valid) ? A[1] : ((b_valid) ? B[1] : C[1]);

  1791.         } else

  1792.             px = py = 0;

  1793.     }

  1794. 

  1795.     /* store MV using signed modulus of MV range defined in 4.11 */

  1796.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1797.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1798.     if (mvn == 1) { /* duplicate motion data for 1-MV block */

  1799.         s->current_picture.motion_val[0][xy +    1    ][0] = s->current_picture.motion_val[0][xy][0];

  1800.         s->current_picture.motion_val[0][xy +    1    ][1] = s->current_picture.motion_val[0][xy][1];

  1801.         s->current_picture.motion_val[0][xy + wrap    ][0] = s->current_picture.motion_val[0][xy][0];

  1802.         s->current_picture.motion_val[0][xy + wrap    ][1] = s->current_picture.motion_val[0][xy][1];

  1803.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1804.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1805.     } else if (mvn == 2) { /* duplicate motion data for 2-Field MV block */

  1806.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  1807.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  1808.         s->mv[0][n + 1][0] = s->mv[0][n][0];

  1809.         s->mv[0][n + 1][1] = s->mv[0][n][1];

  1810.     }

  1811. }

  1812. 

  1813. /** Motion compensation for direct or interpolated blocks in B-frames

  1814.  */

  1815. static void vc1_interp_mc(VC1Context *v)

  1816. {

  1817.     MpegEncContext *s = &v->s;

  1818.     H264ChromaContext *h264chroma = &v->h264chroma;

  1819.     uint8_t *srcY, *srcU, *srcV;

  1820.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1821.     int off, off_uv;

  1822.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  1823. 

  1824.     if (!v->field_mode && !v->s.next_picture.f.data[0])

  1825.         return;

  1826. 

  1827.     mx   = s->mv[1][0][0];

  1828.     my   = s->mv[1][0][1];

  1829.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1830.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1831.     if (v->field_mode) {

  1832.         if (v->cur_field_type != v->ref_field_type[1])

  1833.             my   = my   - 2 + 4 * v->cur_field_type;

  1834.             uvmy = uvmy - 2 + 4 * v->cur_field_type;

  1835.     }

  1836.     if (v->fastuvmc) {

  1837.         uvmx = uvmx + ((uvmx < 0) ? -(uvmx & 1) : (uvmx & 1));

  1838.         uvmy = uvmy + ((uvmy < 0) ? -(uvmy & 1) : (uvmy & 1));

  1839.     }

  1840.     srcY = s->next_picture.f.data[0];

  1841.     srcU = s->next_picture.f.data[1];

  1842.     srcV = s->next_picture.f.data[2];

  1843. 

  1844.     src_x   = s->mb_x * 16 + (mx   >> 2);

  1845.     src_y   = s->mb_y * 16 + (my   >> 2);

  1846.     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);

  1847.     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);

  1848. 

  1849.     if (v->profile != PROFILE_ADVANCED) {

  1850.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1851.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1852.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1853.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1854.     } else {

  1855.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1856.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1857.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1858.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1859.     }

  1860. 

  1861.     srcY += src_y   * s->linesize   + src_x;

  1862.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1863.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1864. 

  1865.     if (v->field_mode && v->ref_field_type[1]) {

  1866.         srcY += s->current_picture_ptr->f.linesize[0];

  1867.         srcU += s->current_picture_ptr->f.linesize[1];

  1868.         srcV += s->current_picture_ptr->f.linesize[2];

  1869.     }

  1870. 

  1871.     /* for grayscale we should not try to read from unknown area */

  1872.     if (s->flags & CODEC_FLAG_GRAY) {

  1873.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1874.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1875.     }

  1876. 

  1877.     if (v->rangeredfrm || s->h_edge_pos < 22 || v_edge_pos < 22

  1878.         || (unsigned)(src_x - 1) > s->h_edge_pos - (mx & 3) - 16 - 3

  1879.         || (unsigned)(src_y - 1) > v_edge_pos    - (my & 3) - 16 - 3) {

  1880.         uint8_t *uvbuf = s->edge_emu_buffer + 19 * s->linesize;

  1881. 

  1882.         srcY -= s->mspel * (1 + s->linesize);

  1883.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize,

  1884.                                  17 + s->mspel * 2, 17 + s->mspel * 2,

  1885.                                  src_x - s->mspel, src_y - s->mspel,

  1886.                                  s->h_edge_pos, v_edge_pos);

  1887.         srcY = s->edge_emu_buffer;

  1888.         s->vdsp.emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8 + 1, 8 + 1,

  1889.                                  uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);

  1890.         s->vdsp.emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8 + 1, 8 + 1,

  1891.                                  uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);

  1892.         srcU = uvbuf;

  1893.         srcV = uvbuf + 16;

  1894.         /* if we deal with range reduction we need to scale source blocks */

  1895.         if (v->rangeredfrm) {

  1896.             int i, j;

  1897.             uint8_t *src, *src2;

  1898. 

  1899.             src = srcY;

  1900.             for (j = 0; j < 17 + s->mspel * 2; j++) {

  1901.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  1902.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1903.                 src += s->linesize;

  1904.             }

  1905.             src = srcU;

  1906.             src2 = srcV;

  1907.             for (j = 0; j < 9; j++) {

  1908.                 for (i = 0; i < 9; i++) {

  1909.                     src[i]  = ((src[i]  - 128) >> 1) + 128;

  1910.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1911.                 }

  1912.                 src  += s->uvlinesize;

  1913.                 src2 += s->uvlinesize;

  1914.             }

  1915.         }

  1916.         srcY += s->mspel * (1 + s->linesize);

  1917.     }

  1918. 

  1919.     off    = 0;

  1920.     off_uv = 0;

  1921. 

  1922.     if (s->mspel) {

  1923.         dxy = ((my & 3) << 2) | (mx & 3);

  1924.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off    , srcY    , s->linesize, v->rnd);

  1925.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8, srcY + 8, s->linesize, v->rnd);

  1926.         srcY += s->linesize * 8;

  1927.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  1928.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  1929.     } else { // hpel mc

  1930.         dxy = (my & 2) | ((mx & 2) >> 1);

  1931. 

  1932.         if (!v->rnd)

  1933.             s->hdsp.avg_pixels_tab[0][dxy](s->dest[0] + off, srcY, s->linesize, 16);

  1934.         else

  1935.             s->hdsp.avg_no_rnd_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, 16);

  1936.     }

  1937. 

  1938.     if (s->flags & CODEC_FLAG_GRAY) return;

  1939.     /* Chroma MC always uses qpel blilinear */

  1940.     uvmx = (uvmx & 3) << 1;

  1941.     uvmy = (uvmy & 3) << 1;

  1942.     if (!v->rnd) {

  1943.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  1944.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  1945.     } else {

  1946.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  1947.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  1948.     }

  1949. }

  1950. 

  1951. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1952. {

  1953.     int n = bfrac;

  1954. 

  1955. #if B_FRACTION_DEN==256

  1956.     if (inv)

  1957.         n -= 256;

  1958.     if (!qs)

  1959.         return 2 * ((value * n + 255) >> 9);

  1960.     return (value * n + 128) >> 8;

  1961. #else

  1962.     if (inv)

  1963.         n -= B_FRACTION_DEN;

  1964.     if (!qs)

  1965.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1966.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1967. #endif

  1968. }

  1969. 

  1970. /** Reconstruct motion vector for B-frame and do motion compensation

  1971.  */

  1972. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],

  1973.                             int direct, int mode)

  1974. {

  1975.     if (v->use_ic) {

  1976.         v->mv_mode2 = v->mv_mode;

  1977.         v->mv_mode  = MV_PMODE_INTENSITY_COMP;

  1978.     }

  1979.     if (direct) {

  1980.         vc1_mc_1mv(v, 0);

  1981.         vc1_interp_mc(v);

  1982.         if (v->use_ic)

  1983.             v->mv_mode = v->mv_mode2;

  1984.         return;

  1985.     }

  1986.     if (mode == BMV_TYPE_INTERPOLATED) {

  1987.         vc1_mc_1mv(v, 0);

  1988.         vc1_interp_mc(v);

  1989.         if (v->use_ic)

  1990.             v->mv_mode = v->mv_mode2;

  1991.         return;

  1992.     }

  1993. 

  1994.     if (v->use_ic && (mode == BMV_TYPE_BACKWARD))

  1995.         v->mv_mode = v->mv_mode2;

  1996.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1997.     if (v->use_ic)

  1998.         v->mv_mode = v->mv_mode2;

  1999. }

  2000. 

  2001. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],

  2002.                                  int direct, int mvtype)

  2003. {

  2004.     MpegEncContext *s = &v->s;

  2005.     int xy, wrap, off = 0;

  2006.     int16_t *A, *B, *C;

  2007.     int px, py;

  2008.     int sum;

  2009.     int r_x, r_y;

  2010.     const uint8_t *is_intra = v->mb_type[0];

  2011. 

  2012.     r_x = v->range_x;

  2013.     r_y = v->range_y;

  2014.     /* scale MV difference to be quad-pel */

  2015.     dmv_x[0] <<= 1 - s->quarter_sample;

  2016.     dmv_y[0] <<= 1 - s->quarter_sample;

  2017.     dmv_x[1] <<= 1 - s->quarter_sample;

  2018.     dmv_y[1] <<= 1 - s->quarter_sample;

  2019. 

  2020.     wrap = s->b8_stride;

  2021.     xy = s->block_index[0];

  2022. 

  2023.     if (s->mb_intra) {

  2024.         s->current_picture.motion_val[0][xy + v->blocks_off][0] =

  2025.         s->current_picture.motion_val[0][xy + v->blocks_off][1] =

  2026.         s->current_picture.motion_val[1][xy + v->blocks_off][0] =

  2027.         s->current_picture.motion_val[1][xy + v->blocks_off][1] = 0;

  2028.         return;

  2029.     }

  2030.     if (!v->field_mode) {

  2031.         s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  2032.         s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  2033.         s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  2034.         s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  2035. 

  2036.         /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  2037.         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));

  2038.         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));

  2039.         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));

  2040.         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));

  2041.     }

  2042.     if (direct) {

  2043.         s->current_picture.motion_val[0][xy + v->blocks_off][0] = s->mv[0][0][0];

  2044.         s->current_picture.motion_val[0][xy + v->blocks_off][1] = s->mv[0][0][1];

  2045.         s->current_picture.motion_val[1][xy + v->blocks_off][0] = s->mv[1][0][0];

  2046.         s->current_picture.motion_val[1][xy + v->blocks_off][1] = s->mv[1][0][1];

  2047.         return;

  2048.     }

  2049. 

  2050.     if ((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2051.         C   = s->current_picture.motion_val[0][xy - 2];

  2052.         A   = s->current_picture.motion_val[0][xy - wrap * 2];

  2053.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2054.         B   = s->current_picture.motion_val[0][xy - wrap * 2 + off];

  2055. 

  2056.         if (!s->mb_x) C[0] = C[1] = 0;

  2057.         if (!s->first_slice_line) { // predictor A is not out of bounds

  2058.             if (s->mb_width == 1) {

  2059.                 px = A[0];

  2060.                 py = A[1];

  2061.             } else {

  2062.                 px = mid_pred(A[0], B[0], C[0]);

  2063.                 py = mid_pred(A[1], B[1], C[1]);

  2064.             }

  2065.         } else if (s->mb_x) { // predictor C is not out of bounds

  2066.             px = C[0];

  2067.             py = C[1];

  2068.         } else {

  2069.             px = py = 0;

  2070.         }

  2071.         /* Pullback MV as specified in 8.3.5.3.4 */

  2072.         {

  2073.             int qx, qy, X, Y;

  2074.             if (v->profile < PROFILE_ADVANCED) {

  2075.                 qx = (s->mb_x << 5);

  2076.                 qy = (s->mb_y << 5);

  2077.                 X  = (s->mb_width  << 5) - 4;

  2078.                 Y  = (s->mb_height << 5) - 4;

  2079.                 if (qx + px < -28) px = -28 - qx;

  2080.                 if (qy + py < -28) py = -28 - qy;

  2081.                 if (qx + px > X) px = X - qx;

  2082.                 if (qy + py > Y) py = Y - qy;

  2083.             } else {

  2084.                 qx = (s->mb_x << 6);

  2085.                 qy = (s->mb_y << 6);

  2086.                 X  = (s->mb_width  << 6) - 4;

  2087.                 Y  = (s->mb_height << 6) - 4;

  2088.                 if (qx + px < -60) px = -60 - qx;

  2089.                 if (qy + py < -60) py = -60 - qy;

  2090.                 if (qx + px > X) px = X - qx;

  2091.                 if (qy + py > Y) py = Y - qy;

  2092.             }

  2093.         }

  2094.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2095.         if (0 && !s->first_slice_line && s->mb_x) {

  2096.             if (is_intra[xy - wrap])

  2097.                 sum = FFABS(px) + FFABS(py);

  2098.             else

  2099.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2100.             if (sum > 32) {

  2101.                 if (get_bits1(&s->gb)) {

  2102.                     px = A[0];

  2103.                     py = A[1];

  2104.                 } else {

  2105.                     px = C[0];

  2106.                     py = C[1];

  2107.                 }

  2108.             } else {

  2109.                 if (is_intra[xy - 2])

  2110.                     sum = FFABS(px) + FFABS(py);

  2111.                 else

  2112.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2113.                 if (sum > 32) {

  2114.                     if (get_bits1(&s->gb)) {

  2115.                         px = A[0];

  2116.                         py = A[1];

  2117.                     } else {

  2118.                         px = C[0];

  2119.                         py = C[1];

  2120.                     }

  2121.                 }

  2122.             }

  2123.         }

  2124.         /* store MV using signed modulus of MV range defined in 4.11 */

  2125.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2126.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2127.     }

  2128.     if ((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2129.         C   = s->current_picture.motion_val[1][xy - 2];

  2130.         A   = s->current_picture.motion_val[1][xy - wrap * 2];

  2131.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2132.         B   = s->current_picture.motion_val[1][xy - wrap * 2 + off];

  2133. 

  2134.         if (!s->mb_x)

  2135.             C[0] = C[1] = 0;

  2136.         if (!s->first_slice_line) { // predictor A is not out of bounds

  2137.             if (s->mb_width == 1) {

  2138.                 px = A[0];

  2139.                 py = A[1];

  2140.             } else {

  2141.                 px = mid_pred(A[0], B[0], C[0]);

  2142.                 py = mid_pred(A[1], B[1], C[1]);

  2143.             }

  2144.         } else if (s->mb_x) { // predictor C is not out of bounds

  2145.             px = C[0];

  2146.             py = C[1];

  2147.         } else {

  2148.             px = py = 0;

  2149.         }

  2150.         /* Pullback MV as specified in 8.3.5.3.4 */

  2151.         {

  2152.             int qx, qy, X, Y;

  2153.             if (v->profile < PROFILE_ADVANCED) {

  2154.                 qx = (s->mb_x << 5);

  2155.                 qy = (s->mb_y << 5);

  2156.                 X  = (s->mb_width  << 5) - 4;

  2157.                 Y  = (s->mb_height << 5) - 4;

  2158.                 if (qx + px < -28) px = -28 - qx;

  2159.                 if (qy + py < -28) py = -28 - qy;

  2160.                 if (qx + px > X) px = X - qx;

  2161.                 if (qy + py > Y) py = Y - qy;

  2162.             } else {

  2163.                 qx = (s->mb_x << 6);

  2164.                 qy = (s->mb_y << 6);

  2165.                 X  = (s->mb_width  << 6) - 4;

  2166.                 Y  = (s->mb_height << 6) - 4;

  2167.                 if (qx + px < -60) px = -60 - qx;

  2168.                 if (qy + py < -60) py = -60 - qy;

  2169.                 if (qx + px > X) px = X - qx;

  2170.                 if (qy + py > Y) py = Y - qy;

  2171.             }

  2172.         }

  2173.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2174.         if (0 && !s->first_slice_line && s->mb_x) {

  2175.             if (is_intra[xy - wrap])

  2176.                 sum = FFABS(px) + FFABS(py);

  2177.             else

  2178.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2179.             if (sum > 32) {

  2180.                 if (get_bits1(&s->gb)) {

  2181.                     px = A[0];

  2182.                     py = A[1];

  2183.                 } else {

  2184.                     px = C[0];

  2185.                     py = C[1];

  2186.                 }

  2187.             } else {

  2188.                 if (is_intra[xy - 2])

  2189.                     sum = FFABS(px) + FFABS(py);

  2190.                 else

  2191.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2192.                 if (sum > 32) {

  2193.                     if (get_bits1(&s->gb)) {

  2194.                         px = A[0];

  2195.                         py = A[1];

  2196.                     } else {

  2197.                         px = C[0];

  2198.                         py = C[1];

  2199.                     }

  2200.                 }

  2201.             }

  2202.         }

  2203.         /* store MV using signed modulus of MV range defined in 4.11 */

  2204. 

  2205.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2206.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2207.     }

  2208.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2209.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2210.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2211.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2212. }

  2213. 

  2214. static inline void vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, int mv1, int *pred_flag)

  2215. {

  2216.     int dir = (v->bmvtype == BMV_TYPE_BACKWARD) ? 1 : 0;

  2217.     MpegEncContext *s = &v->s;

  2218.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2219. 

  2220.     if (v->bmvtype == BMV_TYPE_DIRECT) {

  2221.         int total_opp, k, f;

  2222.         if (s->next_picture.mb_type[mb_pos + v->mb_off] != MB_TYPE_INTRA) {

  2223.             s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],

  2224.                                       v->bfraction, 0, s->quarter_sample);

  2225.             s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1],

  2226.                                       v->bfraction, 0, s->quarter_sample);

  2227.             s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],

  2228.                                       v->bfraction, 1, s->quarter_sample);

  2229.             s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1],

  2230.                                       v->bfraction, 1, s->quarter_sample);

  2231. 

  2232.             total_opp = v->mv_f_next[0][s->block_index[0] + v->blocks_off]

  2233.                       + v->mv_f_next[0][s->block_index[1] + v->blocks_off]

  2234.                       + v->mv_f_next[0][s->block_index[2] + v->blocks_off]

  2235.                       + v->mv_f_next[0][s->block_index[3] + v->blocks_off];

  2236.             f = (total_opp > 2) ? 1 : 0;

  2237.         } else {

  2238.             s->mv[0][0][0] = s->mv[0][0][1] = 0;

  2239.             s->mv[1][0][0] = s->mv[1][0][1] = 0;

  2240.             f = 0;

  2241.         }

  2242.         v->ref_field_type[0] = v->ref_field_type[1] = v->cur_field_type ^ f;

  2243.         for (k = 0; k < 4; k++) {

  2244.             s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][0] = s->mv[0][0][0];

  2245.             s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][1] = s->mv[0][0][1];

  2246.             s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][0] = s->mv[1][0][0];

  2247.             s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][1] = s->mv[1][0][1];

  2248.             v->mv_f[0][s->block_index[k] + v->blocks_off] = f;

  2249.             v->mv_f[1][s->block_index[k] + v->blocks_off] = f;

  2250.         }

  2251.         return;

  2252.     }

  2253.     if (v->bmvtype == BMV_TYPE_INTERPOLATED) {

  2254.         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);

  2255.         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);

  2256.         return;

  2257.     }

  2258.     if (dir) { // backward

  2259.         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);

  2260.         if (n == 3 || mv1) {

  2261.             vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0],   1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  2262.         }

  2263.     } else { // forward

  2264.         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);

  2265.         if (n == 3 || mv1) {

  2266.             vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1],   1, v->range_x, v->range_y, v->mb_type[0], 0, 1);

  2267.         }

  2268.     }

  2269. }

  2270. 

  2271. /** Get predicted DC value for I-frames only

  2272.  * prediction dir: left=0, top=1

  2273.  * @param s MpegEncContext

  2274.  * @param overlap flag indicating that overlap filtering is used

  2275.  * @param pq integer part of picture quantizer

  2276.  * @param[in] n block index in the current MB

  2277.  * @param dc_val_ptr Pointer to DC predictor

  2278.  * @param dir_ptr Prediction direction for use in AC prediction

  2279.  */

  2280. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2281.                                 int16_t **dc_val_ptr, int *dir_ptr)

  2282. {

  2283.     int a, b, c, wrap, pred, scale;

  2284.     int16_t *dc_val;

  2285.     static const uint16_t dcpred[32] = {

  2286.         -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2287.              114,  102,   93,   85,   79,   73,   68,   64,

  2288.               60,   57,   54,   51,   49,   47,   45,   43,

  2289.               41,   39,   38,   37,   35,   34,   33

  2290.     };

  2291. 

  2292.     /* find prediction - wmv3_dc_scale always used here in fact */

  2293.     if (n < 4) scale = s->y_dc_scale;

  2294.     else       scale = s->c_dc_scale;

  2295. 

  2296.     wrap   = s->block_wrap[n];

  2297.     dc_val = s->dc_val[0] + s->block_index[n];

  2298. 

  2299.     /* B A

  2300.      * C X

  2301.      */

  2302.     c = dc_val[ - 1];

  2303.     b = dc_val[ - 1 - wrap];

  2304.     a = dc_val[ - wrap];

  2305. 

  2306.     if (pq < 9 || !overlap) {

  2307.         /* Set outer values */

  2308.         if (s->first_slice_line && (n != 2 && n != 3))

  2309.             b = a = dcpred[scale];

  2310.         if (s->mb_x == 0 && (n != 1 && n != 3))

  2311.             b = c = dcpred[scale];

  2312.     } else {

  2313.         /* Set outer values */

  2314.         if (s->first_slice_line && (n != 2 && n != 3))

  2315.             b = a = 0;

  2316.         if (s->mb_x == 0 && (n != 1 && n != 3))

  2317.             b = c = 0;

  2318.     }

  2319. 

  2320.     if (abs(a - b) <= abs(b - c)) {

  2321.         pred     = c;

  2322.         *dir_ptr = 1; // left

  2323.     } else {

  2324.         pred     = a;

  2325.         *dir_ptr = 0; // top

  2326.     }

  2327. 

  2328.     /* update predictor */

  2329.     *dc_val_ptr = &dc_val[0];

  2330.     return pred;

  2331. }

  2332. 

  2333. 

  2334. /** Get predicted DC value

  2335.  * prediction dir: left=0, top=1

  2336.  * @param s MpegEncContext

  2337.  * @param overlap flag indicating that overlap filtering is used

  2338.  * @param pq integer part of picture quantizer

  2339.  * @param[in] n block index in the current MB

  2340.  * @param a_avail flag indicating top block availability

  2341.  * @param c_avail flag indicating left block availability

  2342.  * @param dc_val_ptr Pointer to DC predictor

  2343.  * @param dir_ptr Prediction direction for use in AC prediction

  2344.  */

  2345. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2346.                               int a_avail, int c_avail,

  2347.                               int16_t **dc_val_ptr, int *dir_ptr)

  2348. {

  2349.     int a, b, c, wrap, pred;

  2350.     int16_t *dc_val;

  2351.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2352.     int q1, q2 = 0;

  2353.     int dqscale_index;

  2354. 

  2355.     wrap = s->block_wrap[n];

  2356.     dc_val = s->dc_val[0] + s->block_index[n];

  2357. 

  2358.     /* B A

  2359.      * C X

  2360.      */

  2361.     c = dc_val[ - 1];

  2362.     b = dc_val[ - 1 - wrap];

  2363.     a = dc_val[ - wrap];

  2364.     /* scale predictors if needed */

  2365.     q1 = s->current_picture.qscale_table[mb_pos];

  2366.     dqscale_index = s->y_dc_scale_table[q1] - 1;

  2367.     if (dqscale_index < 0)

  2368.         return 0;

  2369.     if (c_avail && (n != 1 && n != 3)) {

  2370.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2371.         if (q2 && q2 != q1)

  2372.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;

  2373.     }

  2374.     if (a_avail && (n != 2 && n != 3)) {

  2375.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2376.         if (q2 && q2 != q1)

  2377.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;

  2378.     }

  2379.     if (a_avail && c_avail && (n != 3)) {

  2380.         int off = mb_pos;

  2381.         if (n != 1)

  2382.             off--;

  2383.         if (n != 2)

  2384.             off -= s->mb_stride;

  2385.         q2 = s->current_picture.qscale_table[off];

  2386.         if (q2 && q2 != q1)

  2387.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;

  2388.     }

  2389. 

  2390.     if (a_avail && c_avail) {

  2391.         if (abs(a - b) <= abs(b - c)) {

  2392.             pred     = c;

  2393.             *dir_ptr = 1; // left

  2394.         } else {

  2395.             pred     = a;

  2396.             *dir_ptr = 0; // top

  2397.         }

  2398.     } else if (a_avail) {

  2399.         pred     = a;

  2400.         *dir_ptr = 0; // top

  2401.     } else if (c_avail) {

  2402.         pred     = c;

  2403.         *dir_ptr = 1; // left

  2404.     } else {

  2405.         pred     = 0;

  2406.         *dir_ptr = 1; // left

  2407.     }

  2408. 

  2409.     /* update predictor */

  2410.     *dc_val_ptr = &dc_val[0];

  2411.     return pred;

  2412. }

  2413. 

  2414. /** @} */ // Block group

  2415. 

  2416. /**

  2417.  * @name VC1 Macroblock-level functions in Simple/Main Profiles

  2418.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2419.  * @{

  2420.  */

  2421. 

  2422. static inline int vc1_coded_block_pred(MpegEncContext * s, int n,

  2423.                                        uint8_t **coded_block_ptr)

  2424. {

  2425.     int xy, wrap, pred, a, b, c;

  2426. 

  2427.     xy   = s->block_index[n];

  2428.     wrap = s->b8_stride;

  2429. 

  2430.     /* B C

  2431.      * A X

  2432.      */

  2433.     a = s->coded_block[xy - 1       ];

  2434.     b = s->coded_block[xy - 1 - wrap];

  2435.     c = s->coded_block[xy     - wrap];

  2436. 

  2437.     if (b == c) {

  2438.         pred = a;

  2439.     } else {

  2440.         pred = c;

  2441.     }

  2442. 

  2443.     /* store value */

  2444.     *coded_block_ptr = &s->coded_block[xy];

  2445. 

  2446.     return pred;

  2447. }

  2448. 

  2449. /**

  2450.  * Decode one AC coefficient

  2451.  * @param v The VC1 context

  2452.  * @param last Last coefficient

  2453.  * @param skip How much zero coefficients to skip

  2454.  * @param value Decoded AC coefficient value

  2455.  * @param codingset set of VLC to decode data

  2456.  * @see 8.1.3.4

  2457.  */

  2458. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,

  2459.                                 int *value, int codingset)

  2460. {

  2461.     GetBitContext *gb = &v->s.gb;

  2462.     int index, escape, run = 0, level = 0, lst = 0;

  2463. 

  2464.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2465.     if (index != ff_vc1_ac_sizes[codingset] - 1) {

  2466.         run   = vc1_index_decode_table[codingset][index][0];

  2467.         level = vc1_index_decode_table[codingset][index][1];

  2468.         lst   = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;

  2469.         if (get_bits1(gb))

  2470.             level = -level;

  2471.     } else {

  2472.         escape = decode210(gb);

  2473.         if (escape != 2) {

  2474.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2475.             run   = vc1_index_decode_table[codingset][index][0];

  2476.             level = vc1_index_decode_table[codingset][index][1];

  2477.             lst   = index >= vc1_last_decode_table[codingset];

  2478.             if (escape == 0) {

  2479.                 if (lst)

  2480.                     level += vc1_last_delta_level_table[codingset][run];

  2481.                 else

  2482.                     level += vc1_delta_level_table[codingset][run];

  2483.             } else {

  2484.                 if (lst)

  2485.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2486.                 else

  2487.                     run += vc1_delta_run_table[codingset][level] + 1;

  2488.             }

  2489.             if (get_bits1(gb))

  2490.                 level = -level;

  2491.         } else {

  2492.             int sign;

  2493.             lst = get_bits1(gb);

  2494.             if (v->s.esc3_level_length == 0) {

  2495.                 if (v->pq < 8 || v->dquantfrm) { // table 59

  2496.                     v->s.esc3_level_length = get_bits(gb, 3);

  2497.                     if (!v->s.esc3_level_length)

  2498.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2499.                 } else { // table 60

  2500.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2501.                 }

  2502.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2503.             }

  2504.             run   = get_bits(gb, v->s.esc3_run_length);

  2505.             sign  = get_bits1(gb);

  2506.             level = get_bits(gb, v->s.esc3_level_length);

  2507.             if (sign)

  2508.                 level = -level;

  2509.         }

  2510.     }

  2511. 

  2512.     *last  = lst;

  2513.     *skip  = run;

  2514.     *value = level;

  2515. }

  2516. 

  2517. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2518.  * @param v VC1Context

  2519.  * @param block block to decode

  2520.  * @param[in] n subblock index

  2521.  * @param coded are AC coeffs present or not

  2522.  * @param codingset set of VLC to decode data

  2523.  */

  2524. static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,

  2525.                               int coded, int codingset)

  2526. {

  2527.     GetBitContext *gb = &v->s.gb;

  2528.     MpegEncContext *s = &v->s;

  2529.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2530.     int i;

  2531.     int16_t *dc_val;

  2532.     int16_t *ac_val, *ac_val2;

  2533.     int dcdiff;

  2534. 

  2535.     /* Get DC differential */

  2536.     if (n < 4) {

  2537.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2538.     } else {

  2539.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2540.     }

  2541.     if (dcdiff < 0) {

  2542.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2543.         return -1;

  2544.     }

  2545.     if (dcdiff) {

  2546.         if (dcdiff == 119 /* ESC index value */) {

  2547.             /* TODO: Optimize */

  2548.             if (v->pq == 1)      dcdiff = get_bits(gb, 10);

  2549.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2550.             else                 dcdiff = get_bits(gb, 8);

  2551.         } else {

  2552.             if (v->pq == 1)

  2553.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  2554.             else if (v->pq == 2)

  2555.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  2556.         }

  2557.         if (get_bits1(gb))

  2558.             dcdiff = -dcdiff;

  2559.     }

  2560. 

  2561.     /* Prediction */

  2562.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2563.     *dc_val = dcdiff;

  2564. 

  2565.     /* Store the quantized DC coeff, used for prediction */

  2566.     if (n < 4) {

  2567.         block[0] = dcdiff * s->y_dc_scale;

  2568.     } else {

  2569.         block[0] = dcdiff * s->c_dc_scale;

  2570.     }

  2571.     /* Skip ? */

  2572.     if (!coded) {

  2573.         goto not_coded;

  2574.     }

  2575. 

  2576.     // AC Decoding

  2577.     i = 1;

  2578. 

  2579.     {

  2580.         int last = 0, skip, value;

  2581.         const uint8_t *zz_table;

  2582.         int scale;

  2583.         int k;

  2584. 

  2585.         scale = v->pq * 2 + v->halfpq;

  2586. 

  2587.         if (v->s.ac_pred) {

  2588.             if (!dc_pred_dir)

  2589.                 zz_table = v->zz_8x8[2];

  2590.             else

  2591.                 zz_table = v->zz_8x8[3];

  2592.         } else

  2593.             zz_table = v->zz_8x8[1];

  2594. 

  2595.         ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2596.         ac_val2 = ac_val;

  2597.         if (dc_pred_dir) // left

  2598.             ac_val -= 16;

  2599.         else // top

  2600.             ac_val -= 16 * s->block_wrap[n];

  2601. 

  2602.         while (!last) {

  2603.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2604.             i += skip;

  2605.             if (i > 63)

  2606.                 break;

  2607.             block[zz_table[i++]] = value;

  2608.         }

  2609. 

  2610.         /* apply AC prediction if needed */

  2611.         if (s->ac_pred) {

  2612.             if (dc_pred_dir) { // left

  2613.                 for (k = 1; k < 8; k++)

  2614.                     block[k << v->left_blk_sh] += ac_val[k];

  2615.             } else { // top

  2616.                 for (k = 1; k < 8; k++)

  2617.                     block[k << v->top_blk_sh] += ac_val[k + 8];

  2618.             }

  2619.         }

  2620.         /* save AC coeffs for further prediction */

  2621.         for (k = 1; k < 8; k++) {

  2622.             ac_val2[k]     = block[k << v->left_blk_sh];

  2623.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  2624.         }

  2625. 

  2626.         /* scale AC coeffs */

  2627.         for (k = 1; k < 64; k++)

  2628.             if (block[k]) {

  2629.                 block[k] *= scale;

  2630.                 if (!v->pquantizer)

  2631.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2632.             }

  2633. 

  2634.         if (s->ac_pred) i = 63;

  2635.     }

  2636. 

  2637. not_coded:

  2638.     if (!coded) {

  2639.         int k, scale;

  2640.         ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2641.         ac_val2 = ac_val;

  2642. 

  2643.         i = 0;

  2644.         scale = v->pq * 2 + v->halfpq;

  2645.         memset(ac_val2, 0, 16 * 2);

  2646.         if (dc_pred_dir) { // left

  2647.             ac_val -= 16;

  2648.             if (s->ac_pred)

  2649.                 memcpy(ac_val2, ac_val, 8 * 2);

  2650.         } else { // top

  2651.             ac_val -= 16 * s->block_wrap[n];

  2652.             if (s->ac_pred)

  2653.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2654.         }

  2655. 

  2656.         /* apply AC prediction if needed */

  2657.         if (s->ac_pred) {

  2658.             if (dc_pred_dir) { //left

  2659.                 for (k = 1; k < 8; k++) {

  2660.                     block[k << v->left_blk_sh] = ac_val[k] * scale;

  2661.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  2662.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -v->pq : v->pq;

  2663.                 }

  2664.             } else { // top

  2665.                 for (k = 1; k < 8; k++) {

  2666.                     block[k << v->top_blk_sh] = ac_val[k + 8] * scale;

  2667.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  2668.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -v->pq : v->pq;

  2669.                 }

  2670.             }

  2671.             i = 63;

  2672.         }

  2673.     }

  2674.     s->block_last_index[n] = i;

  2675. 

  2676.     return 0;

  2677. }

  2678. 

  2679. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2680.  * @param v VC1Context

  2681.  * @param block block to decode

  2682.  * @param[in] n subblock number

  2683.  * @param coded are AC coeffs present or not

  2684.  * @param codingset set of VLC to decode data

  2685.  * @param mquant quantizer value for this macroblock

  2686.  */

  2687. static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,

  2688.                                   int coded, int codingset, int mquant)

  2689. {

  2690.     GetBitContext *gb = &v->s.gb;

  2691.     MpegEncContext *s = &v->s;

  2692.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2693.     int i;

  2694.     int16_t *dc_val;

  2695.     int16_t *ac_val, *ac_val2;

  2696.     int dcdiff;

  2697.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2698.     int use_pred = s->ac_pred;

  2699.     int scale;

  2700.     int q1, q2 = 0;

  2701.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2702. 

  2703.     /* Get DC differential */

  2704.     if (n < 4) {

  2705.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2706.     } else {

  2707.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2708.     }

  2709.     if (dcdiff < 0) {

  2710.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2711.         return -1;

  2712.     }

  2713.     if (dcdiff) {

  2714.         if (dcdiff == 119 /* ESC index value */) {

  2715.             /* TODO: Optimize */

  2716.             if (mquant == 1)      dcdiff = get_bits(gb, 10);

  2717.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2718.             else                  dcdiff = get_bits(gb, 8);

  2719.         } else {

  2720.             if (mquant == 1)

  2721.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  2722.             else if (mquant == 2)

  2723.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  2724.         }

  2725.         if (get_bits1(gb))

  2726.             dcdiff = -dcdiff;

  2727.     }

  2728. 

  2729.     /* Prediction */

  2730.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2731.     *dc_val = dcdiff;

  2732. 

  2733.     /* Store the quantized DC coeff, used for prediction */

  2734.     if (n < 4) {

  2735.         block[0] = dcdiff * s->y_dc_scale;

  2736.     } else {

  2737.         block[0] = dcdiff * s->c_dc_scale;

  2738.     }

  2739. 

  2740.     //AC Decoding

  2741.     i = 1;

  2742. 

  2743.     /* check if AC is needed at all */

  2744.     if (!a_avail && !c_avail)

  2745.         use_pred = 0;

  2746.     ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2747.     ac_val2 = ac_val;

  2748. 

  2749.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2750. 

  2751.     if (dc_pred_dir) // left

  2752.         ac_val -= 16;

  2753.     else // top

  2754.         ac_val -= 16 * s->block_wrap[n];

  2755. 

  2756.     q1 = s->current_picture.qscale_table[mb_pos];

  2757.     if ( dc_pred_dir && c_avail && mb_pos)

  2758.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2759.     if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)

  2760.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2761.     if ( dc_pred_dir && n == 1)

  2762.         q2 = q1;

  2763.     if (!dc_pred_dir && n == 2)

  2764.         q2 = q1;

  2765.     if (n == 3)

  2766.         q2 = q1;

  2767. 

  2768.     if (coded) {

  2769.         int last = 0, skip, value;

  2770.         const uint8_t *zz_table;

  2771.         int k;

  2772. 

  2773.         if (v->s.ac_pred) {

  2774.             if (!use_pred && v->fcm == ILACE_FRAME) {

  2775.                 zz_table = v->zzi_8x8;

  2776.             } else {

  2777.                 if (!dc_pred_dir) // top

  2778.                     zz_table = v->zz_8x8[2];

  2779.                 else // left

  2780.                     zz_table = v->zz_8x8[3];

  2781.             }

  2782.         } else {

  2783.             if (v->fcm != ILACE_FRAME)

  2784.                 zz_table = v->zz_8x8[1];

  2785.             else

  2786.                 zz_table = v->zzi_8x8;

  2787.         }

  2788. 

  2789.         while (!last) {

  2790.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2791.             i += skip;

  2792.             if (i > 63)

  2793.                 break;

  2794.             block[zz_table[i++]] = value;

  2795.         }

  2796. 

  2797.         /* apply AC prediction if needed */

  2798.         if (use_pred) {

  2799.             /* scale predictors if needed*/

  2800.             if (q2 && q1 != q2) {

  2801.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2802.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2803. 

  2804.                 if (q1 < 1)

  2805.                     return AVERROR_INVALIDDATA;

  2806.                 if (dc_pred_dir) { // left

  2807.                     for (k = 1; k < 8; k++)

  2808.                         block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2809.                 } else { // top

  2810.                     for (k = 1; k < 8; k++)

  2811.                         block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2812.                 }

  2813.             } else {

  2814.                 if (dc_pred_dir) { //left

  2815.                     for (k = 1; k < 8; k++)

  2816.                         block[k << v->left_blk_sh] += ac_val[k];

  2817.                 } else { //top

  2818.                     for (k = 1; k < 8; k++)

  2819.                         block[k << v->top_blk_sh] += ac_val[k + 8];

  2820.                 }

  2821.             }

  2822.         }

  2823.         /* save AC coeffs for further prediction */

  2824.         for (k = 1; k < 8; k++) {

  2825.             ac_val2[k    ] = block[k << v->left_blk_sh];

  2826.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  2827.         }

  2828. 

  2829.         /* scale AC coeffs */

  2830.         for (k = 1; k < 64; k++)

  2831.             if (block[k]) {

  2832.                 block[k] *= scale;

  2833.                 if (!v->pquantizer)

  2834.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2835.             }

  2836. 

  2837.         if (use_pred) i = 63;

  2838.     } else { // no AC coeffs

  2839.         int k;

  2840. 

  2841.         memset(ac_val2, 0, 16 * 2);

  2842.         if (dc_pred_dir) { // left

  2843.             if (use_pred) {

  2844.                 memcpy(ac_val2, ac_val, 8 * 2);

  2845.                 if (q2 && q1 != q2) {

  2846.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2847.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2848.                     if (q1 < 1)

  2849.                         return AVERROR_INVALIDDATA;

  2850.                     for (k = 1; k < 8; k++)

  2851.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2852.                 }

  2853.             }

  2854.         } else { // top

  2855.             if (use_pred) {

  2856.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2857.                 if (q2 && q1 != q2) {

  2858.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2859.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2860.                     if (q1 < 1)

  2861.                         return AVERROR_INVALIDDATA;

  2862.                     for (k = 1; k < 8; k++)

  2863.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2864.                 }

  2865.             }

  2866.         }

  2867. 

  2868.         /* apply AC prediction if needed */

  2869.         if (use_pred) {

  2870.             if (dc_pred_dir) { // left

  2871.                 for (k = 1; k < 8; k++) {

  2872.                     block[k << v->left_blk_sh] = ac_val2[k] * scale;

  2873.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  2874.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;

  2875.                 }

  2876.             } else { // top

  2877.                 for (k = 1; k < 8; k++) {

  2878.                     block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;

  2879.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  2880.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;

  2881.                 }

  2882.             }

  2883.             i = 63;

  2884.         }

  2885.     }

  2886.     s->block_last_index[n] = i;

  2887. 

  2888.     return 0;

  2889. }

  2890. 

  2891. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2892.  * @param v VC1Context

  2893.  * @param block block to decode

  2894.  * @param[in] n subblock index

  2895.  * @param coded are AC coeffs present or not

  2896.  * @param mquant block quantizer

  2897.  * @param codingset set of VLC to decode data

  2898.  */

  2899. static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,

  2900.                                   int coded, int mquant, int codingset)

  2901. {

  2902.     GetBitContext *gb = &v->s.gb;

  2903.     MpegEncContext *s = &v->s;

  2904.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2905.     int i;

  2906.     int16_t *dc_val;

  2907.     int16_t *ac_val, *ac_val2;

  2908.     int dcdiff;

  2909.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2910.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2911.     int use_pred = s->ac_pred;

  2912.     int scale;

  2913.     int q1, q2 = 0;

  2914. 

  2915.     s->dsp.clear_block(block);

  2916. 

  2917.     /* XXX: Guard against dumb values of mquant */

  2918.     mquant = (mquant < 1) ? 0 : ((mquant > 31) ? 31 : mquant);

  2919. 

  2920.     /* Set DC scale - y and c use the same */

  2921.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2922.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2923. 

  2924.     /* Get DC differential */

  2925.     if (n < 4) {

  2926.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2927.     } else {

  2928.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2929.     }

  2930.     if (dcdiff < 0) {

  2931.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2932.         return -1;

  2933.     }

  2934.     if (dcdiff) {

  2935.         if (dcdiff == 119 /* ESC index value */) {

  2936.             /* TODO: Optimize */

  2937.             if (mquant == 1)      dcdiff = get_bits(gb, 10);

  2938.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2939.             else                  dcdiff = get_bits(gb, 8);

  2940.         } else {

  2941.             if (mquant == 1)

  2942.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  2943.             else if (mquant == 2)

  2944.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  2945.         }

  2946.         if (get_bits1(gb))

  2947.             dcdiff = -dcdiff;

  2948.     }

  2949. 

  2950.     /* Prediction */

  2951.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2952.     *dc_val = dcdiff;

  2953. 

  2954.     /* Store the quantized DC coeff, used for prediction */

  2955. 

  2956.     if (n < 4) {

  2957.         block[0] = dcdiff * s->y_dc_scale;

  2958.     } else {

  2959.         block[0] = dcdiff * s->c_dc_scale;

  2960.     }

  2961. 

  2962.     //AC Decoding

  2963.     i = 1;

  2964. 

  2965.     /* check if AC is needed at all and adjust direction if needed */

  2966.     if (!a_avail) dc_pred_dir = 1;

  2967.     if (!c_avail) dc_pred_dir = 0;

  2968.     if (!a_avail && !c_avail) use_pred = 0;

  2969.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2970.     ac_val2 = ac_val;

  2971. 

  2972.     scale = mquant * 2 + v->halfpq;

  2973. 

  2974.     if (dc_pred_dir) //left

  2975.         ac_val -= 16;

  2976.     else //top

  2977.         ac_val -= 16 * s->block_wrap[n];

  2978. 

  2979.     q1 = s->current_picture.qscale_table[mb_pos];

  2980.     if (dc_pred_dir && c_avail && mb_pos)

  2981.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2982.     if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)

  2983.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2984.     if ( dc_pred_dir && n == 1)

  2985.         q2 = q1;

  2986.     if (!dc_pred_dir && n == 2)

  2987.         q2 = q1;

  2988.     if (n == 3) q2 = q1;

  2989. 

  2990.     if (coded) {

  2991.         int last = 0, skip, value;

  2992.         int k;

  2993. 

  2994.         while (!last) {

  2995.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2996.             i += skip;

  2997.             if (i > 63)

  2998.                 break;

  2999.             if (v->fcm == PROGRESSIVE)

  3000.                 block[v->zz_8x8[0][i++]] = value;

  3001.             else {

  3002.                 if (use_pred && (v->fcm == ILACE_FRAME)) {

  3003.                     if (!dc_pred_dir) // top

  3004.                         block[v->zz_8x8[2][i++]] = value;

  3005.                     else // left

  3006.                         block[v->zz_8x8[3][i++]] = value;

  3007.                 } else {

  3008.                     block[v->zzi_8x8[i++]] = value;

  3009.                 }

  3010.             }

  3011.         }

  3012. 

  3013.         /* apply AC prediction if needed */

  3014.         if (use_pred) {

  3015.             /* scale predictors if needed*/

  3016.             if (q2 && q1 != q2) {

  3017.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3018.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3019. 

  3020.                 if (q1 < 1)

  3021.                     return AVERROR_INVALIDDATA;

  3022.                 if (dc_pred_dir) { // left

  3023.                     for (k = 1; k < 8; k++)

  3024.                         block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3025.                 } else { //top

  3026.                     for (k = 1; k < 8; k++)

  3027.                         block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3028.                 }

  3029.             } else {

  3030.                 if (dc_pred_dir) { // left

  3031.                     for (k = 1; k < 8; k++)

  3032.                         block[k << v->left_blk_sh] += ac_val[k];

  3033.                 } else { // top

  3034.                     for (k = 1; k < 8; k++)

  3035.                         block[k << v->top_blk_sh] += ac_val[k + 8];

  3036.                 }

  3037.             }

  3038.         }

  3039.         /* save AC coeffs for further prediction */

  3040.         for (k = 1; k < 8; k++) {

  3041.             ac_val2[k    ] = block[k << v->left_blk_sh];

  3042.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  3043.         }

  3044. 

  3045.         /* scale AC coeffs */

  3046.         for (k = 1; k < 64; k++)

  3047.             if (block[k]) {

  3048.                 block[k] *= scale;

  3049.                 if (!v->pquantizer)

  3050.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  3051.             }

  3052. 

  3053.         if (use_pred) i = 63;

  3054.     } else { // no AC coeffs

  3055.         int k;

  3056. 

  3057.         memset(ac_val2, 0, 16 * 2);

  3058.         if (dc_pred_dir) { // left

  3059.             if (use_pred) {

  3060.                 memcpy(ac_val2, ac_val, 8 * 2);

  3061.                 if (q2 && q1 != q2) {

  3062.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3063.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3064.                     if (q1 < 1)

  3065.                         return AVERROR_INVALIDDATA;

  3066.                     for (k = 1; k < 8; k++)

  3067.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3068.                 }

  3069.             }

  3070.         } else { // top

  3071.             if (use_pred) {

  3072.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  3073.                 if (q2 && q1 != q2) {

  3074.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3075.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3076.                     if (q1 < 1)

  3077.                         return AVERROR_INVALIDDATA;

  3078.                     for (k = 1; k < 8; k++)

  3079.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3080.                 }

  3081.             }

  3082.         }

  3083. 

  3084.         /* apply AC prediction if needed */

  3085.         if (use_pred) {

  3086.             if (dc_pred_dir) { // left

  3087.                 for (k = 1; k < 8; k++) {

  3088.                     block[k << v->left_blk_sh] = ac_val2[k] * scale;

  3089.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  3090.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;

  3091.                 }

  3092.             } else { // top

  3093.                 for (k = 1; k < 8; k++) {

  3094.                     block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;

  3095.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  3096.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;

  3097.                 }

  3098.             }

  3099.             i = 63;

  3100.         }

  3101.     }

  3102.     s->block_last_index[n] = i;

  3103. 

  3104.     return 0;

  3105. }

  3106. 

  3107. /** Decode P block

  3108.  */

  3109. static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,

  3110.                               int mquant, int ttmb, int first_block,

  3111.                               uint8_t *dst, int linesize, int skip_block,

  3112.                               int *ttmb_out)

  3113. {

  3114.     MpegEncContext *s = &v->s;

  3115.     GetBitContext *gb = &s->gb;

  3116.     int i, j;

  3117.     int subblkpat = 0;

  3118.     int scale, off, idx, last, skip, value;

  3119.     int ttblk = ttmb & 7;

  3120.     int pat = 0;

  3121. 

  3122.     s->dsp.clear_block(block);

  3123. 

  3124.     if (ttmb == -1) {

  3125.         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)];

  3126.     }

  3127.     if (ttblk == TT_4X4) {

  3128.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  3129.     }

  3130.     if ((ttblk != TT_8X8 && ttblk != TT_4X4)

  3131.         && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))

  3132.             || (!v->res_rtm_flag && !first_block))) {

  3133.         subblkpat = decode012(gb);

  3134.         if (subblkpat)

  3135.             subblkpat ^= 3; // swap decoded pattern bits

  3136.         if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)

  3137.             ttblk = TT_8X4;

  3138.         if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)

  3139.             ttblk = TT_4X8;

  3140.     }

  3141.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  3142. 

  3143.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  3144.     if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  3145.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  3146.         ttblk     = TT_8X4;

  3147.     }

  3148.     if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  3149.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  3150.         ttblk     = TT_4X8;

  3151.     }

  3152.     switch (ttblk) {

  3153.     case TT_8X8:

  3154.         pat  = 0xF;

  3155.         i    = 0;

  3156.         last = 0;

  3157.         while (!last) {

  3158.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3159.             i += skip;

  3160.             if (i > 63)

  3161.                 break;

  3162.             if (!v->fcm)

  3163.                 idx = v->zz_8x8[0][i++];

  3164.             else

  3165.                 idx = v->zzi_8x8[i++];

  3166.             block[idx] = value * scale;

  3167.             if (!v->pquantizer)

  3168.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3169.         }

  3170.         if (!skip_block) {

  3171.             if (i == 1)

  3172.                 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);

  3173.             else {

  3174.                 v->vc1dsp.vc1_inv_trans_8x8(block);

  3175.                 s->dsp.add_pixels_clamped(block, dst, linesize);

  3176.             }

  3177.         }

  3178.         break;

  3179.     case TT_4X4:

  3180.         pat = ~subblkpat & 0xF;

  3181.         for (j = 0; j < 4; j++) {

  3182.             last = subblkpat & (1 << (3 - j));

  3183.             i    = 0;

  3184.             off  = (j & 1) * 4 + (j & 2) * 16;

  3185.             while (!last) {

  3186.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3187.                 i += skip;

  3188.                 if (i > 15)

  3189.                     break;

  3190.                 if (!v->fcm)

  3191.                     idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3192.                 else

  3193.                     idx = ff_vc1_adv_interlaced_4x4_zz[i++];

  3194.                 block[idx + off] = value * scale;

  3195.                 if (!v->pquantizer)

  3196.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3197.             }

  3198.             if (!(subblkpat & (1 << (3 - j))) && !skip_block) {

  3199.                 if (i == 1)

  3200.                     v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);

  3201.                 else

  3202.                     v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) *  2 * linesize, linesize, block + off);

  3203.             }

  3204.         }

  3205.         break;

  3206.     case TT_8X4:

  3207.         pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;

  3208.         for (j = 0; j < 2; j++) {

  3209.             last = subblkpat & (1 << (1 - j));

  3210.             i    = 0;

  3211.             off  = j * 32;

  3212.             while (!last) {

  3213.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3214.                 i += skip;

  3215.                 if (i > 31)

  3216.                     break;

  3217.                 if (!v->fcm)

  3218.                     idx = v->zz_8x4[i++] + off;

  3219.                 else

  3220.                     idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;

  3221.                 block[idx] = value * scale;

  3222.                 if (!v->pquantizer)

  3223.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3224.             }

  3225.             if (!(subblkpat & (1 << (1 - j))) && !skip_block) {

  3226.                 if (i == 1)

  3227.                     v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);

  3228.                 else

  3229.                     v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);

  3230.             }

  3231.         }

  3232.         break;

  3233.     case TT_4X8:

  3234.         pat = ~(subblkpat * 5) & 0xF;

  3235.         for (j = 0; j < 2; j++) {

  3236.             last = subblkpat & (1 << (1 - j));

  3237.             i    = 0;

  3238.             off  = j * 4;

  3239.             while (!last) {

  3240.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3241.                 i += skip;

  3242.                 if (i > 31)

  3243.                     break;

  3244.                 if (!v->fcm)

  3245.                     idx = v->zz_4x8[i++] + off;

  3246.                 else

  3247.                     idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;

  3248.                 block[idx] = value * scale;

  3249.                 if (!v->pquantizer)

  3250.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3251.             }

  3252.             if (!(subblkpat & (1 << (1 - j))) && !skip_block) {

  3253.                 if (i == 1)

  3254.                     v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);

  3255.                 else

  3256.                     v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3257.             }

  3258.         }

  3259.         break;

  3260.     }

  3261.     if (ttmb_out)

  3262.         *ttmb_out |= ttblk << (n * 4);

  3263.     return pat;

  3264. }

  3265. 

  3266. /** @} */ // Macroblock group

  3267. 

  3268. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3269. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3270. 

  3271. static av_always_inline void vc1_apply_p_v_loop_filter(VC1Context *v, int block_num)

  3272. {

  3273.     MpegEncContext *s  = &v->s;

  3274.     int mb_cbp         = v->cbp[s->mb_x - s->mb_stride],

  3275.         block_cbp      = mb_cbp      >> (block_num * 4), bottom_cbp,

  3276.         mb_is_intra    = v->is_intra[s->mb_x - s->mb_stride],

  3277.         block_is_intra = mb_is_intra >> (block_num * 4), bottom_is_intra;

  3278.     int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;

  3279.     uint8_t *dst;

  3280. 

  3281.     if (block_num > 3) {

  3282.         dst      = s->dest[block_num - 3];

  3283.     } else {

  3284.         dst      = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 8) * linesize;

  3285.     }

  3286.     if (s->mb_y != s->end_mb_y || block_num < 2) {

  3287.         int16_t (*mv)[2];

  3288.         int mv_stride;

  3289. 

  3290.         if (block_num > 3) {

  3291.             bottom_cbp      = v->cbp[s->mb_x]      >> (block_num * 4);

  3292.             bottom_is_intra = v->is_intra[s->mb_x] >> (block_num * 4);

  3293.             mv              = &v->luma_mv[s->mb_x - s->mb_stride];

  3294.             mv_stride       = s->mb_stride;

  3295.         } else {

  3296.             bottom_cbp      = (block_num < 2) ? (mb_cbp               >> ((block_num + 2) * 4))

  3297.                                               : (v->cbp[s->mb_x]      >> ((block_num - 2) * 4));

  3298.             bottom_is_intra = (block_num < 2) ? (mb_is_intra          >> ((block_num + 2) * 4))

  3299.                                               : (v->is_intra[s->mb_x] >> ((block_num - 2) * 4));

  3300.             mv_stride       = s->b8_stride;

  3301.             mv              = &s->current_picture.motion_val[0][s->block_index[block_num] - 2 * mv_stride];

  3302.         }

  3303. 

  3304.         if (bottom_is_intra & 1 || block_is_intra & 1 ||

  3305.             mv[0][0] != mv[mv_stride][0] || mv[0][1] != mv[mv_stride][1]) {

  3306.             v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3307.         } else {

  3308.             idx = ((bottom_cbp >> 2) | block_cbp) & 3;

  3309.             if (idx == 3) {

  3310.                 v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3311.             } else if (idx) {

  3312.                 if (idx == 1)

  3313.                     v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);

  3314.                 else

  3315.                     v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);

  3316.             }

  3317.         }

  3318.     }

  3319. 

  3320.     dst -= 4 * linesize;

  3321.     ttblk = (v->ttblk[s->mb_x - s->mb_stride] >> (block_num * 4)) & 0xF;

  3322.     if (ttblk == TT_4X4 || ttblk == TT_8X4) {

  3323.         idx = (block_cbp | (block_cbp >> 2)) & 3;

  3324.         if (idx == 3) {

  3325.             v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3326.         } else if (idx) {

  3327.             if (idx == 1)

  3328.                 v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);

  3329.             else

  3330.                 v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);

  3331.         }

  3332.     }

  3333. }

  3334. 

  3335. static av_always_inline void vc1_apply_p_h_loop_filter(VC1Context *v, int block_num)

  3336. {

  3337.     MpegEncContext *s  = &v->s;

  3338.     int mb_cbp         = v->cbp[s->mb_x - 1 - s->mb_stride],

  3339.         block_cbp      = mb_cbp      >> (block_num * 4), right_cbp,

  3340.         mb_is_intra    = v->is_intra[s->mb_x - 1 - s->mb_stride],

  3341.         block_is_intra = mb_is_intra >> (block_num * 4), right_is_intra;

  3342.     int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;

  3343.     uint8_t *dst;

  3344. 

  3345.     if (block_num > 3) {

  3346.         dst = s->dest[block_num - 3] - 8 * linesize;

  3347.     } else {

  3348.         dst = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 16) * linesize - 8;

  3349.     }

  3350. 

  3351.     if (s->mb_x != s->mb_width || !(block_num & 5)) {

  3352.         int16_t (*mv)[2];

  3353. 

  3354.         if (block_num > 3) {

  3355.             right_cbp      = v->cbp[s->mb_x - s->mb_stride] >> (block_num * 4);

  3356.             right_is_intra = v->is_intra[s->mb_x - s->mb_stride] >> (block_num * 4);

  3357.             mv             = &v->luma_mv[s->mb_x - s->mb_stride - 1];

  3358.         } else {

  3359.             right_cbp      = (block_num & 1) ? (v->cbp[s->mb_x - s->mb_stride]      >> ((block_num - 1) * 4))

  3360.                                              : (mb_cbp                              >> ((block_num + 1) * 4));

  3361.             right_is_intra = (block_num & 1) ? (v->is_intra[s->mb_x - s->mb_stride] >> ((block_num - 1) * 4))

  3362.                                              : (mb_is_intra                         >> ((block_num + 1) * 4));

  3363.             mv             = &s->current_picture.motion_val[0][s->block_index[block_num] - s->b8_stride * 2 - 2];

  3364.         }

  3365.         if (block_is_intra & 1 || right_is_intra & 1 || mv[0][0] != mv[1][0] || mv[0][1] != mv[1][1]) {

  3366.             v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3367.         } else {

  3368.             idx = ((right_cbp >> 1) | block_cbp) & 5; // FIXME check

  3369.             if (idx == 5) {

  3370.                 v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3371.             } else if (idx) {

  3372.                 if (idx == 1)

  3373.                     v->vc1dsp.vc1_h_loop_filter4(dst + 4 * linesize, linesize, v->pq);

  3374.                 else

  3375.                     v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);

  3376.             }

  3377.         }

  3378.     }

  3379. 

  3380.     dst -= 4;

  3381.     ttblk = (v->ttblk[s->mb_x - s->mb_stride - 1] >> (block_num * 4)) & 0xf;

  3382.     if (ttblk == TT_4X4 || ttblk == TT_4X8) {

  3383.         idx = (block_cbp | (block_cbp >> 1)) & 5;

  3384.         if (idx == 5) {

  3385.             v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3386.         } else if (idx) {

  3387.             if (idx == 1)

  3388.                 v->vc1dsp.vc1_h_loop_filter4(dst + linesize * 4, linesize, v->pq);

  3389.             else

  3390.                 v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);

  3391.         }

  3392.     }

  3393. }

  3394. 

  3395. static void vc1_apply_p_loop_filter(VC1Context *v)

  3396. {

  3397.     MpegEncContext *s = &v->s;

  3398.     int i;

  3399. 

  3400.     for (i = 0; i < 6; i++) {

  3401.         vc1_apply_p_v_loop_filter(v, i);

  3402.     }

  3403. 

  3404.     /* V always precedes H, therefore we run H one MB before V;

  3405.      * at the end of a row, we catch up to complete the row */

  3406.     if (s->mb_x) {

  3407.         for (i = 0; i < 6; i++) {

  3408.             vc1_apply_p_h_loop_filter(v, i);

  3409.         }

  3410.         if (s->mb_x == s->mb_width - 1) {

  3411.             s->mb_x++;

  3412.             ff_update_block_index(s);

  3413.             for (i = 0; i < 6; i++) {

  3414.                 vc1_apply_p_h_loop_filter(v, i);

  3415.             }

  3416.         }

  3417.     }

  3418. }

  3419. 

  3420. /** Decode one P-frame MB

  3421.  */

  3422. static int vc1_decode_p_mb(VC1Context *v)

  3423. {

  3424.     MpegEncContext *s = &v->s;

  3425.     GetBitContext *gb = &s->gb;

  3426.     int i, j;

  3427.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3428.     int cbp; /* cbp decoding stuff */

  3429.     int mqdiff, mquant; /* MB quantization */

  3430.     int ttmb = v->ttfrm; /* MB Transform type */

  3431. 

  3432.     int mb_has_coeffs = 1; /* last_flag */

  3433.     int dmv_x, dmv_y; /* Differential MV components */

  3434.     int index, index1; /* LUT indexes */

  3435.     int val, sign; /* temp values */

  3436.     int first_block = 1;

  3437.     int dst_idx, off;

  3438.     int skipped, fourmv;

  3439.     int block_cbp = 0, pat, block_tt = 0, block_intra = 0;

  3440. 

  3441.     mquant = v->pq; /* lossy initialization */

  3442. 

  3443.     if (v->mv_type_is_raw)

  3444.         fourmv = get_bits1(gb);

  3445.     else

  3446.         fourmv = v->mv_type_mb_plane[mb_pos];

  3447.     if (v->skip_is_raw)

  3448.         skipped = get_bits1(gb);

  3449.     else

  3450.         skipped = v->s.mbskip_table[mb_pos];

  3451. 

  3452.     if (!fourmv) { /* 1MV mode */

  3453.         if (!skipped) {

  3454.             GET_MVDATA(dmv_x, dmv_y);

  3455. 

  3456.             if (s->mb_intra) {

  3457.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3458.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3459.             }

  3460.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3461.             vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3462. 

  3463.             /* FIXME Set DC val for inter block ? */

  3464.             if (s->mb_intra && !mb_has_coeffs) {

  3465.                 GET_MQUANT();

  3466.                 s->ac_pred = get_bits1(gb);

  3467.                 cbp        = 0;

  3468.             } else if (mb_has_coeffs) {

  3469.                 if (s->mb_intra)

  3470.                     s->ac_pred = get_bits1(gb);

  3471.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3472.                 GET_MQUANT();

  3473.             } else {

  3474.                 mquant = v->pq;

  3475.                 cbp    = 0;

  3476.             }

  3477.             s->current_picture.qscale_table[mb_pos] = mquant;

  3478. 

  3479.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3480.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3481.                                 VC1_TTMB_VLC_BITS, 2);

  3482.             if (!s->mb_intra) vc1_mc_1mv(v, 0);

  3483.             dst_idx = 0;

  3484.             for (i = 0; i < 6; i++) {

  3485.                 s->dc_val[0][s->block_index[i]] = 0;

  3486.                 dst_idx += i >> 2;

  3487.                 val = ((cbp >> (5 - i)) & 1);

  3488.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3489.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3490.                 if (s->mb_intra) {

  3491.                     /* check if prediction blocks A and C are available */

  3492.                     v->a_avail = v->c_avail = 0;

  3493.                     if (i == 2 || i == 3 || !s->first_slice_line)

  3494.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3495.                     if (i == 1 || i == 3 || s->mb_x)

  3496.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3497. 

  3498.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  3499.                                            (i & 4) ? v->codingset2 : v->codingset);

  3500.                     if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  3501.                         continue;

  3502.                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3503.                     if (v->rangeredfrm)

  3504.                         for (j = 0; j < 64; j++)

  3505.                             s->block[i][j] <<= 1;

  3506.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3507.                     if (v->pq >= 9 && v->overlap) {

  3508.                         if (v->c_avail)

  3509.                             v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3510.                         if (v->a_avail)

  3511.                             v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3512.                     }

  3513.                     block_cbp   |= 0xF << (i << 2);

  3514.                     block_intra |= 1 << i;

  3515.                 } else if (val) {

  3516.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,

  3517.                                              s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,

  3518.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);

  3519.                     block_cbp |= pat << (i << 2);

  3520.                     if (!v->ttmbf && ttmb < 8)

  3521.                         ttmb = -1;

  3522.                     first_block = 0;

  3523.                 }

  3524.             }

  3525.         } else { // skipped

  3526.             s->mb_intra = 0;

  3527.             for (i = 0; i < 6; i++) {

  3528.                 v->mb_type[0][s->block_index[i]] = 0;

  3529.                 s->dc_val[0][s->block_index[i]]  = 0;

  3530.             }

  3531.             s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;

  3532.             s->current_picture.qscale_table[mb_pos] = 0;

  3533.             vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3534.             vc1_mc_1mv(v, 0);

  3535.         }

  3536.     } else { // 4MV mode

  3537.         if (!skipped /* unskipped MB */) {

  3538.             int intra_count = 0, coded_inter = 0;

  3539.             int is_intra[6], is_coded[6];

  3540.             /* Get CBPCY */

  3541.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3542.             for (i = 0; i < 6; i++) {

  3543.                 val = ((cbp >> (5 - i)) & 1);

  3544.                 s->dc_val[0][s->block_index[i]] = 0;

  3545.                 s->mb_intra                     = 0;

  3546.                 if (i < 4) {

  3547.                     dmv_x = dmv_y = 0;

  3548.                     s->mb_intra   = 0;

  3549.                     mb_has_coeffs = 0;

  3550.                     if (val) {

  3551.                         GET_MVDATA(dmv_x, dmv_y);

  3552.                     }

  3553.                     vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3554.                     if (!s->mb_intra)

  3555.                         vc1_mc_4mv_luma(v, i, 0);

  3556.                     intra_count += s->mb_intra;

  3557.                     is_intra[i]  = s->mb_intra;

  3558.                     is_coded[i]  = mb_has_coeffs;

  3559.                 }

  3560.                 if (i & 4) {

  3561.                     is_intra[i] = (intra_count >= 3);

  3562.                     is_coded[i] = val;

  3563.                 }

  3564.                 if (i == 4)

  3565.                     vc1_mc_4mv_chroma(v, 0);

  3566.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3567.                 if (!coded_inter)

  3568.                     coded_inter = !is_intra[i] & is_coded[i];

  3569.             }

  3570.             // if there are no coded blocks then don't do anything more

  3571.             dst_idx = 0;

  3572.             if (!intra_count && !coded_inter)

  3573.                 goto end;

  3574.             GET_MQUANT();

  3575.             s->current_picture.qscale_table[mb_pos] = mquant;

  3576.             /* test if block is intra and has pred */

  3577.             {

  3578.                 int intrapred = 0;

  3579.                 for (i = 0; i < 6; i++)

  3580.                     if (is_intra[i]) {

  3581.                         if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3582.                             || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3583.                             intrapred = 1;

  3584.                             break;

  3585.                         }

  3586.                     }

  3587.                 if (intrapred)

  3588.                     s->ac_pred = get_bits1(gb);

  3589.                 else

  3590.                     s->ac_pred = 0;

  3591.             }

  3592.             if (!v->ttmbf && coded_inter)

  3593.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3594.             for (i = 0; i < 6; i++) {

  3595.                 dst_idx    += i >> 2;

  3596.                 off         = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3597.                 s->mb_intra = is_intra[i];

  3598.                 if (is_intra[i]) {

  3599.                     /* check if prediction blocks A and C are available */

  3600.                     v->a_avail = v->c_avail = 0;

  3601.                     if (i == 2 || i == 3 || !s->first_slice_line)

  3602.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3603.                     if (i == 1 || i == 3 || s->mb_x)

  3604.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3605. 

  3606.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant,

  3607.                                            (i & 4) ? v->codingset2 : v->codingset);

  3608.                     if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  3609.                         continue;

  3610.                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3611.                     if (v->rangeredfrm)

  3612.                         for (j = 0; j < 64; j++)

  3613.                             s->block[i][j] <<= 1;

  3614.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off,

  3615.                                                      (i & 4) ? s->uvlinesize : s->linesize);

  3616.                     if (v->pq >= 9 && v->overlap) {

  3617.                         if (v->c_avail)

  3618.                             v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3619.                         if (v->a_avail)

  3620.                             v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3621.                     }

  3622.                     block_cbp   |= 0xF << (i << 2);

  3623.                     block_intra |= 1 << i;

  3624.                 } else if (is_coded[i]) {

  3625.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  3626.                                              first_block, s->dest[dst_idx] + off,

  3627.                                              (i & 4) ? s->uvlinesize : s->linesize,

  3628.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY),

  3629.                                              &block_tt);

  3630.                     block_cbp |= pat << (i << 2);

  3631.                     if (!v->ttmbf && ttmb < 8)

  3632.                         ttmb = -1;

  3633.                     first_block = 0;

  3634.                 }

  3635.             }

  3636.         } else { // skipped MB

  3637.             s->mb_intra                               = 0;

  3638.             s->current_picture.qscale_table[mb_pos] = 0;

  3639.             for (i = 0; i < 6; i++) {

  3640.                 v->mb_type[0][s->block_index[i]] = 0;

  3641.                 s->dc_val[0][s->block_index[i]]  = 0;

  3642.             }

  3643.             for (i = 0; i < 4; i++) {

  3644.                 vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3645.                 vc1_mc_4mv_luma(v, i, 0);

  3646.             }

  3647.             vc1_mc_4mv_chroma(v, 0);

  3648.             s->current_picture.qscale_table[mb_pos] = 0;

  3649.         }

  3650.     }

  3651. end:

  3652.     v->cbp[s->mb_x]      = block_cbp;

  3653.     v->ttblk[s->mb_x]    = block_tt;

  3654.     v->is_intra[s->mb_x] = block_intra;

  3655. 

  3656.     return 0;

  3657. }

  3658. 

  3659. /* Decode one macroblock in an interlaced frame p picture */

  3660. 

  3661. static int vc1_decode_p_mb_intfr(VC1Context *v)

  3662. {

  3663.     MpegEncContext *s = &v->s;

  3664.     GetBitContext *gb = &s->gb;

  3665.     int i;

  3666.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3667.     int cbp = 0; /* cbp decoding stuff */

  3668.     int mqdiff, mquant; /* MB quantization */

  3669.     int ttmb = v->ttfrm; /* MB Transform type */

  3670. 

  3671.     int mb_has_coeffs = 1; /* last_flag */

  3672.     int dmv_x, dmv_y; /* Differential MV components */

  3673.     int val; /* temp value */

  3674.     int first_block = 1;

  3675.     int dst_idx, off;

  3676.     int skipped, fourmv = 0, twomv = 0;

  3677.     int block_cbp = 0, pat, block_tt = 0;

  3678.     int idx_mbmode = 0, mvbp;

  3679.     int stride_y, fieldtx;

  3680. 

  3681.     mquant = v->pq; /* Loosy initialization */

  3682. 

  3683.     if (v->skip_is_raw)

  3684.         skipped = get_bits1(gb);

  3685.     else

  3686.         skipped = v->s.mbskip_table[mb_pos];

  3687.     if (!skipped) {

  3688.         if (v->fourmvswitch)

  3689.             idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done

  3690.         else

  3691.             idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line

  3692.         switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {

  3693.         /* store the motion vector type in a flag (useful later) */

  3694.         case MV_PMODE_INTFR_4MV:

  3695.             fourmv = 1;

  3696.             v->blk_mv_type[s->block_index[0]] = 0;

  3697.             v->blk_mv_type[s->block_index[1]] = 0;

  3698.             v->blk_mv_type[s->block_index[2]] = 0;

  3699.             v->blk_mv_type[s->block_index[3]] = 0;

  3700.             break;

  3701.         case MV_PMODE_INTFR_4MV_FIELD:

  3702.             fourmv = 1;

  3703.             v->blk_mv_type[s->block_index[0]] = 1;

  3704.             v->blk_mv_type[s->block_index[1]] = 1;

  3705.             v->blk_mv_type[s->block_index[2]] = 1;

  3706.             v->blk_mv_type[s->block_index[3]] = 1;

  3707.             break;

  3708.         case MV_PMODE_INTFR_2MV_FIELD:

  3709.             twomv = 1;

  3710.             v->blk_mv_type[s->block_index[0]] = 1;

  3711.             v->blk_mv_type[s->block_index[1]] = 1;

  3712.             v->blk_mv_type[s->block_index[2]] = 1;

  3713.             v->blk_mv_type[s->block_index[3]] = 1;

  3714.             break;

  3715.         case MV_PMODE_INTFR_1MV:

  3716.             v->blk_mv_type[s->block_index[0]] = 0;

  3717.             v->blk_mv_type[s->block_index[1]] = 0;

  3718.             v->blk_mv_type[s->block_index[2]] = 0;

  3719.             v->blk_mv_type[s->block_index[3]] = 0;

  3720.             break;

  3721.         }

  3722.         if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB

  3723.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3724.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3725.             s->current_picture.mb_type[mb_pos]                     = MB_TYPE_INTRA;

  3726.             s->mb_intra = v->is_intra[s->mb_x] = 1;

  3727.             for (i = 0; i < 6; i++)

  3728.                 v->mb_type[0][s->block_index[i]] = 1;

  3729.             fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);

  3730.             mb_has_coeffs = get_bits1(gb);

  3731.             if (mb_has_coeffs)

  3732.                 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3733.             v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);

  3734.             GET_MQUANT();

  3735.             s->current_picture.qscale_table[mb_pos] = mquant;

  3736.             /* Set DC scale - y and c use the same (not sure if necessary here) */

  3737.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3738.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3739.             dst_idx = 0;

  3740.             for (i = 0; i < 6; i++) {

  3741.                 s->dc_val[0][s->block_index[i]] = 0;

  3742.                 dst_idx += i >> 2;

  3743.                 val = ((cbp >> (5 - i)) & 1);

  3744.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3745.                 v->a_avail = v->c_avail = 0;

  3746.                 if (i == 2 || i == 3 || !s->first_slice_line)

  3747.                     v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3748.                 if (i == 1 || i == 3 || s->mb_x)

  3749.                     v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3750. 

  3751.                 vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  3752.                                        (i & 4) ? v->codingset2 : v->codingset);

  3753.                 if ((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3754.                 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3755.                 if (i < 4) {

  3756.                     stride_y = s->linesize << fieldtx;

  3757.                     off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;

  3758.                 } else {

  3759.                     stride_y = s->uvlinesize;

  3760.                     off = 0;

  3761.                 }

  3762.                 s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, stride_y);

  3763.                 //TODO: loop filter

  3764.             }

  3765. 

  3766.         } else { // inter MB

  3767.             mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];

  3768.             if (mb_has_coeffs)

  3769.                 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3770.             if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {

  3771.                 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);

  3772.             } else {

  3773.                 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)

  3774.                     || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {

  3775.                     v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  3776.                 }

  3777.             }

  3778.             s->mb_intra = v->is_intra[s->mb_x] = 0;

  3779.             for (i = 0; i < 6; i++)

  3780.                 v->mb_type[0][s->block_index[i]] = 0;

  3781.             fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];

  3782.             /* for all motion vector read MVDATA and motion compensate each block */

  3783.             dst_idx = 0;

  3784.             if (fourmv) {

  3785.                 mvbp = v->fourmvbp;

  3786.                 for (i = 0; i < 6; i++) {

  3787.                     if (i < 4) {

  3788.                         dmv_x = dmv_y = 0;

  3789.                         val   = ((mvbp >> (3 - i)) & 1);

  3790.                         if (val) {

  3791.                             get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3792.                         }

  3793.                         vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3794.                         vc1_mc_4mv_luma(v, i, 0);

  3795.                     } else if (i == 4) {

  3796.                         vc1_mc_4mv_chroma4(v);

  3797.                     }

  3798.                 }

  3799.             } else if (twomv) {

  3800.                 mvbp  = v->twomvbp;

  3801.                 dmv_x = dmv_y = 0;

  3802.                 if (mvbp & 2) {

  3803.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3804.                 }

  3805.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0]);

  3806.                 vc1_mc_4mv_luma(v, 0, 0);

  3807.                 vc1_mc_4mv_luma(v, 1, 0);

  3808.                 dmv_x = dmv_y = 0;

  3809.                 if (mvbp & 1) {

  3810.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3811.                 }

  3812.                 vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0]);

  3813.                 vc1_mc_4mv_luma(v, 2, 0);

  3814.                 vc1_mc_4mv_luma(v, 3, 0);

  3815.                 vc1_mc_4mv_chroma4(v);

  3816.             } else {

  3817.                 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];

  3818.                 dmv_x = dmv_y = 0;

  3819.                 if (mvbp) {

  3820.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3821.                 }

  3822.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3823.                 vc1_mc_1mv(v, 0);

  3824.             }

  3825.             if (cbp)

  3826.                 GET_MQUANT();  // p. 227

  3827.             s->current_picture.qscale_table[mb_pos] = mquant;

  3828.             if (!v->ttmbf && cbp)

  3829.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3830.             for (i = 0; i < 6; i++) {

  3831.                 s->dc_val[0][s->block_index[i]] = 0;

  3832.                 dst_idx += i >> 2;

  3833.                 val = ((cbp >> (5 - i)) & 1);

  3834.                 if (!fieldtx)

  3835.                     off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3836.                 else

  3837.                     off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));

  3838.                 if (val) {

  3839.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  3840.                                              first_block, s->dest[dst_idx] + off,

  3841.                                              (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),

  3842.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);

  3843.                     block_cbp |= pat << (i << 2);

  3844.                     if (!v->ttmbf && ttmb < 8)

  3845.                         ttmb = -1;

  3846.                     first_block = 0;

  3847.                 }

  3848.             }

  3849.         }

  3850.     } else { // skipped

  3851.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  3852.         for (i = 0; i < 6; i++) {

  3853.             v->mb_type[0][s->block_index[i]] = 0;

  3854.             s->dc_val[0][s->block_index[i]] = 0;

  3855.         }

  3856.         s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;

  3857.         s->current_picture.qscale_table[mb_pos] = 0;

  3858.         v->blk_mv_type[s->block_index[0]] = 0;

  3859.         v->blk_mv_type[s->block_index[1]] = 0;

  3860.         v->blk_mv_type[s->block_index[2]] = 0;

  3861.         v->blk_mv_type[s->block_index[3]] = 0;

  3862.         vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3863.         vc1_mc_1mv(v, 0);

  3864.     }

  3865.     if (s->mb_x == s->mb_width - 1)

  3866.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0])*s->mb_stride);

  3867.     return 0;

  3868. }

  3869. 

  3870. static int vc1_decode_p_mb_intfi(VC1Context *v)

  3871. {

  3872.     MpegEncContext *s = &v->s;

  3873.     GetBitContext *gb = &s->gb;

  3874.     int i;

  3875.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3876.     int cbp = 0; /* cbp decoding stuff */

  3877.     int mqdiff, mquant; /* MB quantization */

  3878.     int ttmb = v->ttfrm; /* MB Transform type */

  3879. 

  3880.     int mb_has_coeffs = 1; /* last_flag */

  3881.     int dmv_x, dmv_y; /* Differential MV components */

  3882.     int val; /* temp values */

  3883.     int first_block = 1;

  3884.     int dst_idx, off;

  3885.     int pred_flag;

  3886.     int block_cbp = 0, pat, block_tt = 0;

  3887.     int idx_mbmode = 0;

  3888. 

  3889.     mquant = v->pq; /* Loosy initialization */

  3890. 

  3891.     idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);

  3892.     if (idx_mbmode <= 1) { // intra MB

  3893.         s->mb_intra = v->is_intra[s->mb_x] = 1;

  3894.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  3895.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  3896.         s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;

  3897.         GET_MQUANT();

  3898.         s->current_picture.qscale_table[mb_pos] = mquant;

  3899.         /* Set DC scale - y and c use the same (not sure if necessary here) */

  3900.         s->y_dc_scale = s->y_dc_scale_table[mquant];

  3901.         s->c_dc_scale = s->c_dc_scale_table[mquant];

  3902.         v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);

  3903.         mb_has_coeffs = idx_mbmode & 1;

  3904.         if (mb_has_coeffs)

  3905.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);

  3906.         dst_idx = 0;

  3907.         for (i = 0; i < 6; i++) {

  3908.             s->dc_val[0][s->block_index[i]]  = 0;

  3909.             v->mb_type[0][s->block_index[i]] = 1;

  3910.             dst_idx += i >> 2;

  3911.             val = ((cbp >> (5 - i)) & 1);

  3912.             v->a_avail = v->c_avail = 0;

  3913.             if (i == 2 || i == 3 || !s->first_slice_line)

  3914.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3915.             if (i == 1 || i == 3 || s->mb_x)

  3916.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3917. 

  3918.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  3919.                                    (i & 4) ? v->codingset2 : v->codingset);

  3920.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  3921.                 continue;

  3922.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3923.             off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3924.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize);

  3925.             // TODO: loop filter

  3926.         }

  3927.     } else {

  3928.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  3929.         s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;

  3930.         for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;

  3931.         if (idx_mbmode <= 5) { // 1-MV

  3932.             dmv_x = dmv_y = pred_flag = 0;

  3933.             if (idx_mbmode & 1) {

  3934.                 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);

  3935.             }

  3936.             vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);

  3937.             vc1_mc_1mv(v, 0);

  3938.             mb_has_coeffs = !(idx_mbmode & 2);

  3939.         } else { // 4-MV

  3940.             v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  3941.             for (i = 0; i < 6; i++) {

  3942.                 if (i < 4) {

  3943.                     dmv_x = dmv_y = pred_flag = 0;

  3944.                     val   = ((v->fourmvbp >> (3 - i)) & 1);

  3945.                     if (val) {

  3946.                         get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);

  3947.                     }

  3948.                     vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);

  3949.                     vc1_mc_4mv_luma(v, i, 0);

  3950.                 } else if (i == 4)

  3951.                     vc1_mc_4mv_chroma(v, 0);

  3952.             }

  3953.             mb_has_coeffs = idx_mbmode & 1;

  3954.         }

  3955.         if (mb_has_coeffs)

  3956.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3957.         if (cbp) {

  3958.             GET_MQUANT();

  3959.         }

  3960.         s->current_picture.qscale_table[mb_pos] = mquant;

  3961.         if (!v->ttmbf && cbp) {

  3962.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3963.         }

  3964.         dst_idx = 0;

  3965.         for (i = 0; i < 6; i++) {

  3966.             s->dc_val[0][s->block_index[i]] = 0;

  3967.             dst_idx += i >> 2;

  3968.             val = ((cbp >> (5 - i)) & 1);

  3969.             off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;

  3970.             if (val) {

  3971.                 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  3972.                                          first_block, s->dest[dst_idx] + off,

  3973.                                          (i & 4) ? s->uvlinesize : s->linesize,

  3974.                                          (i & 4) && (s->flags & CODEC_FLAG_GRAY),

  3975.                                          &block_tt);

  3976.                 block_cbp |= pat << (i << 2);

  3977.                 if (!v->ttmbf && ttmb < 8) ttmb = -1;

  3978.                 first_block = 0;

  3979.             }

  3980.         }

  3981.     }

  3982.     if (s->mb_x == s->mb_width - 1)

  3983.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);

  3984.     return 0;

  3985. }

  3986. 

  3987. /** Decode one B-frame MB (in Main profile)

  3988.  */

  3989. static void vc1_decode_b_mb(VC1Context *v)

  3990. {

  3991.     MpegEncContext *s = &v->s;

  3992.     GetBitContext *gb = &s->gb;

  3993.     int i, j;

  3994.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3995.     int cbp = 0; /* cbp decoding stuff */

  3996.     int mqdiff, mquant; /* MB quantization */

  3997.     int ttmb = v->ttfrm; /* MB Transform type */

  3998.     int mb_has_coeffs = 0; /* last_flag */

  3999.     int index, index1; /* LUT indexes */

  4000.     int val, sign; /* temp values */

  4001.     int first_block = 1;

  4002.     int dst_idx, off;

  4003.     int skipped, direct;

  4004.     int dmv_x[2], dmv_y[2];

  4005.     int bmvtype = BMV_TYPE_BACKWARD;

  4006. 

  4007.     mquant      = v->pq; /* lossy initialization */

  4008.     s->mb_intra = 0;

  4009. 

  4010.     if (v->dmb_is_raw)

  4011.         direct = get_bits1(gb);

  4012.     else

  4013.         direct = v->direct_mb_plane[mb_pos];

  4014.     if (v->skip_is_raw)

  4015.         skipped = get_bits1(gb);

  4016.     else

  4017.         skipped = v->s.mbskip_table[mb_pos];

  4018. 

  4019.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  4020.     for (i = 0; i < 6; i++) {

  4021.         v->mb_type[0][s->block_index[i]] = 0;

  4022.         s->dc_val[0][s->block_index[i]]  = 0;

  4023.     }

  4024.     s->current_picture.qscale_table[mb_pos] = 0;

  4025. 

  4026.     if (!direct) {

  4027.         if (!skipped) {

  4028.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  4029.             dmv_x[1] = dmv_x[0];

  4030.             dmv_y[1] = dmv_y[0];

  4031.         }

  4032.         if (skipped || !s->mb_intra) {

  4033.             bmvtype = decode012(gb);

  4034.             switch (bmvtype) {

  4035.             case 0:

  4036.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  4037.                 break;

  4038.             case 1:

  4039.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  4040.                 break;

  4041.             case 2:

  4042.                 bmvtype  = BMV_TYPE_INTERPOLATED;

  4043.                 dmv_x[0] = dmv_y[0] = 0;

  4044.             }

  4045.         }

  4046.     }

  4047.     for (i = 0; i < 6; i++)

  4048.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4049. 

  4050.     if (skipped) {

  4051.         if (direct)

  4052.             bmvtype = BMV_TYPE_INTERPOLATED;

  4053.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4054.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4055.         return;

  4056.     }

  4057.     if (direct) {

  4058.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4059.         GET_MQUANT();

  4060.         s->mb_intra = 0;

  4061.         s->current_picture.qscale_table[mb_pos] = mquant;

  4062.         if (!v->ttmbf)

  4063.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4064.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  4065.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4066.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4067.     } else {

  4068.         if (!mb_has_coeffs && !s->mb_intra) {

  4069.             /* no coded blocks - effectively skipped */

  4070.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4071.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4072.             return;

  4073.         }

  4074.         if (s->mb_intra && !mb_has_coeffs) {

  4075.             GET_MQUANT();

  4076.             s->current_picture.qscale_table[mb_pos] = mquant;

  4077.             s->ac_pred = get_bits1(gb);

  4078.             cbp = 0;

  4079.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4080.         } else {

  4081.             if (bmvtype == BMV_TYPE_INTERPOLATED) {

  4082.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  4083.                 if (!mb_has_coeffs) {

  4084.                     /* interpolated skipped block */

  4085.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4086.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4087.                     return;

  4088.                 }

  4089.             }

  4090.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4091.             if (!s->mb_intra) {

  4092.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4093.             }

  4094.             if (s->mb_intra)

  4095.                 s->ac_pred = get_bits1(gb);

  4096.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4097.             GET_MQUANT();

  4098.             s->current_picture.qscale_table[mb_pos] = mquant;

  4099.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  4100.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4101.         }

  4102.     }

  4103.     dst_idx = 0;

  4104.     for (i = 0; i < 6; i++) {

  4105.         s->dc_val[0][s->block_index[i]] = 0;

  4106.         dst_idx += i >> 2;

  4107.         val = ((cbp >> (5 - i)) & 1);

  4108.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4109.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4110.         if (s->mb_intra) {

  4111.             /* check if prediction blocks A and C are available */

  4112.             v->a_avail = v->c_avail = 0;

  4113.             if (i == 2 || i == 3 || !s->first_slice_line)

  4114.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4115.             if (i == 1 || i == 3 || s->mb_x)

  4116.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4117. 

  4118.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4119.                                    (i & 4) ? v->codingset2 : v->codingset);

  4120.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4121.                 continue;

  4122.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4123.             if (v->rangeredfrm)

  4124.                 for (j = 0; j < 64; j++)

  4125.                     s->block[i][j] <<= 1;

  4126.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  4127.         } else if (val) {

  4128.             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4129.                                first_block, s->dest[dst_idx] + off,

  4130.                                (i & 4) ? s->uvlinesize : s->linesize,

  4131.                                (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);

  4132.             if (!v->ttmbf && ttmb < 8)

  4133.                 ttmb = -1;

  4134.             first_block = 0;

  4135.         }

  4136.     }

  4137. }

  4138. 

  4139. /** Decode one B-frame MB (in interlaced field B picture)

  4140.  */

  4141. static void vc1_decode_b_mb_intfi(VC1Context *v)

  4142. {

  4143.     MpegEncContext *s = &v->s;

  4144.     GetBitContext *gb = &s->gb;

  4145.     int i, j;

  4146.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4147.     int cbp = 0; /* cbp decoding stuff */

  4148.     int mqdiff, mquant; /* MB quantization */

  4149.     int ttmb = v->ttfrm; /* MB Transform type */

  4150.     int mb_has_coeffs = 0; /* last_flag */

  4151.     int val; /* temp value */

  4152.     int first_block = 1;

  4153.     int dst_idx, off;

  4154.     int fwd;

  4155.     int dmv_x[2], dmv_y[2], pred_flag[2];

  4156.     int bmvtype = BMV_TYPE_BACKWARD;

  4157.     int idx_mbmode, interpmvp;

  4158. 

  4159.     mquant      = v->pq; /* Loosy initialization */

  4160.     s->mb_intra = 0;

  4161. 

  4162.     idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);

  4163.     if (idx_mbmode <= 1) { // intra MB

  4164.         s->mb_intra = v->is_intra[s->mb_x] = 1;

  4165.         s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  4166.         s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  4167.         s->current_picture.mb_type[mb_pos + v->mb_off]         = MB_TYPE_INTRA;

  4168.         GET_MQUANT();

  4169.         s->current_picture.qscale_table[mb_pos] = mquant;

  4170.         /* Set DC scale - y and c use the same (not sure if necessary here) */

  4171.         s->y_dc_scale = s->y_dc_scale_table[mquant];

  4172.         s->c_dc_scale = s->c_dc_scale_table[mquant];

  4173.         v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);

  4174.         mb_has_coeffs = idx_mbmode & 1;

  4175.         if (mb_has_coeffs)

  4176.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);

  4177.         dst_idx = 0;

  4178.         for (i = 0; i < 6; i++) {

  4179.             s->dc_val[0][s->block_index[i]] = 0;

  4180.             dst_idx += i >> 2;

  4181.             val = ((cbp >> (5 - i)) & 1);

  4182.             v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4183.             v->a_avail                       = v->c_avail = 0;

  4184.             if (i == 2 || i == 3 || !s->first_slice_line)

  4185.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4186.             if (i == 1 || i == 3 || s->mb_x)

  4187.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4188. 

  4189.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4190.                                    (i & 4) ? v->codingset2 : v->codingset);

  4191.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4192.                 continue;

  4193.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4194.             if (v->rangeredfrm)

  4195.                 for (j = 0; j < 64; j++)

  4196.                     s->block[i][j] <<= 1;

  4197.             off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4198.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize);

  4199.             // TODO: yet to perform loop filter

  4200.         }

  4201.     } else {

  4202.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  4203.         s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;

  4204.         for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;

  4205.         if (v->fmb_is_raw)

  4206.             fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);

  4207.         else

  4208.             fwd = v->forward_mb_plane[mb_pos];

  4209.         if (idx_mbmode <= 5) { // 1-MV

  4210.             dmv_x[0]     = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  4211.             pred_flag[0] = pred_flag[1] = 0;

  4212.             if (fwd)

  4213.                 bmvtype = BMV_TYPE_FORWARD;

  4214.             else {

  4215.                 bmvtype = decode012(gb);

  4216.                 switch (bmvtype) {

  4217.                 case 0:

  4218.                     bmvtype = BMV_TYPE_BACKWARD;

  4219.                     break;

  4220.                 case 1:

  4221.                     bmvtype = BMV_TYPE_DIRECT;

  4222.                     break;

  4223.                 case 2:

  4224.                     bmvtype   = BMV_TYPE_INTERPOLATED;

  4225.                     interpmvp = get_bits1(gb);

  4226.                 }

  4227.             }

  4228.             v->bmvtype = bmvtype;

  4229.             if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {

  4230.                 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);

  4231.             }

  4232.             if (bmvtype == BMV_TYPE_INTERPOLATED && interpmvp) {

  4233.                 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);

  4234.             }

  4235.             if (bmvtype == BMV_TYPE_DIRECT) {

  4236.                 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;

  4237.                 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;

  4238.             }

  4239.             vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);

  4240.             vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);

  4241.             mb_has_coeffs = !(idx_mbmode & 2);

  4242.         } else { // 4-MV

  4243.             if (fwd)

  4244.                 bmvtype = BMV_TYPE_FORWARD;

  4245.             v->bmvtype  = bmvtype;

  4246.             v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  4247.             for (i = 0; i < 6; i++) {

  4248.                 if (i < 4) {

  4249.                     dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;

  4250.                     dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;

  4251.                     val = ((v->fourmvbp >> (3 - i)) & 1);

  4252.                     if (val) {

  4253.                         get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],

  4254.                                                  &dmv_y[bmvtype == BMV_TYPE_BACKWARD],

  4255.                                              &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);

  4256.                     }

  4257.                     vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);

  4258.                     vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD);

  4259.                 } else if (i == 4)

  4260.                     vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);

  4261.             }

  4262.             mb_has_coeffs = idx_mbmode & 1;

  4263.         }

  4264.         if (mb_has_coeffs)

  4265.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4266.         if (cbp) {

  4267.             GET_MQUANT();

  4268.         }

  4269.         s->current_picture.qscale_table[mb_pos] = mquant;

  4270.         if (!v->ttmbf && cbp) {

  4271.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4272.         }

  4273.         dst_idx = 0;

  4274.         for (i = 0; i < 6; i++) {

  4275.             s->dc_val[0][s->block_index[i]] = 0;

  4276.             dst_idx += i >> 2;

  4277.             val = ((cbp >> (5 - i)) & 1);

  4278.             off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;

  4279.             if (val) {

  4280.                 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4281.                                    first_block, s->dest[dst_idx] + off,

  4282.                                    (i & 4) ? s->uvlinesize : s->linesize,

  4283.                                    (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);

  4284.                 if (!v->ttmbf && ttmb < 8)

  4285.                     ttmb = -1;

  4286.                 first_block = 0;

  4287.             }

  4288.         }

  4289.     }

  4290. }

  4291. 

  4292. /** Decode blocks of I-frame

  4293.  */

  4294. static void vc1_decode_i_blocks(VC1Context *v)

  4295. {

  4296.     int k, j;

  4297.     MpegEncContext *s = &v->s;

  4298.     int cbp, val;

  4299.     uint8_t *coded_val;

  4300.     int mb_pos;

  4301. 

  4302.     /* select codingmode used for VLC tables selection */

  4303.     switch (v->y_ac_table_index) {

  4304.     case 0:

  4305.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4306.         break;

  4307.     case 1:

  4308.         v->codingset = CS_HIGH_MOT_INTRA;

  4309.         break;

  4310.     case 2:

  4311.         v->codingset = CS_MID_RATE_INTRA;

  4312.         break;

  4313.     }

  4314. 

  4315.     switch (v->c_ac_table_index) {

  4316.     case 0:

  4317.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4318.         break;

  4319.     case 1:

  4320.         v->codingset2 = CS_HIGH_MOT_INTER;

  4321.         break;

  4322.     case 2:

  4323.         v->codingset2 = CS_MID_RATE_INTER;

  4324.         break;

  4325.     }

  4326. 

  4327.     /* Set DC scale - y and c use the same */

  4328.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  4329.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  4330. 

  4331.     //do frame decode

  4332.     s->mb_x = s->mb_y = 0;

  4333.     s->mb_intra         = 1;

  4334.     s->first_slice_line = 1;

  4335.     for (s->mb_y = 0; s->mb_y < s->end_mb_y; s->mb_y++) {

  4336.         s->mb_x = 0;

  4337.         init_block_index(v);

  4338.         for (; s->mb_x < v->end_mb_x; s->mb_x++) {

  4339.             uint8_t *dst[6];

  4340.             ff_update_block_index(s);

  4341.             dst[0] = s->dest[0];

  4342.             dst[1] = dst[0] + 8;

  4343.             dst[2] = s->dest[0] + s->linesize * 8;

  4344.             dst[3] = dst[2] + 8;

  4345.             dst[4] = s->dest[1];

  4346.             dst[5] = s->dest[2];

  4347.             s->dsp.clear_blocks(s->block[0]);

  4348.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  4349.             s->current_picture.mb_type[mb_pos]                     = MB_TYPE_INTRA;

  4350.             s->current_picture.qscale_table[mb_pos]                = v->pq;

  4351.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  4352.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  4353. 

  4354.             // do actual MB decoding and displaying

  4355.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  4356.             v->s.ac_pred = get_bits1(&v->s.gb);

  4357. 

  4358.             for (k = 0; k < 6; k++) {

  4359.                 val = ((cbp >> (5 - k)) & 1);

  4360. 

  4361.                 if (k < 4) {

  4362.                     int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);

  4363.                     val        = val ^ pred;

  4364.                     *coded_val = val;

  4365.                 }

  4366.                 cbp |= val << (5 - k);

  4367. 

  4368.                 vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);

  4369. 

  4370.                 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))

  4371.                     continue;

  4372.                 v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);

  4373.                 if (v->pq >= 9 && v->overlap) {

  4374.                     if (v->rangeredfrm)

  4375.                         for (j = 0; j < 64; j++)

  4376.                             s->block[k][j] <<= 1;

  4377.                     s->dsp.put_signed_pixels_clamped(s->block[k], dst[k], k & 4 ? s->uvlinesize : s->linesize);

  4378.                 } else {

  4379.                     if (v->rangeredfrm)

  4380.                         for (j = 0; j < 64; j++)

  4381.                             s->block[k][j] = (s->block[k][j] - 64) << 1;

  4382.                     s->dsp.put_pixels_clamped(s->block[k], dst[k], k & 4 ? s->uvlinesize : s->linesize);

  4383.                 }

  4384.             }

  4385. 

  4386.             if (v->pq >= 9 && v->overlap) {

  4387.                 if (s->mb_x) {

  4388.                     v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);

  4389.                     v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  4390.                     if (!(s->flags & CODEC_FLAG_GRAY)) {

  4391.                         v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  4392.                         v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  4393.                     }

  4394.                 }

  4395.                 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  4396.                 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  4397.                 if (!s->first_slice_line) {

  4398.                     v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);

  4399.                     v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  4400.                     if (!(s->flags & CODEC_FLAG_GRAY)) {

  4401.                         v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  4402.                         v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  4403.                     }

  4404.                 }

  4405.                 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  4406.                 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  4407.             }

  4408.             if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);

  4409. 

  4410.             if (get_bits_count(&s->gb) > v->bits) {

  4411.                 ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);

  4412.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",

  4413.                        get_bits_count(&s->gb), v->bits);

  4414.                 return;

  4415.             }

  4416.         }

  4417.         if (!v->s.loop_filter)

  4418.             ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  4419.         else if (s->mb_y)

  4420.             ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  4421. 

  4422.         s->first_slice_line = 0;

  4423.     }

  4424.     if (v->s.loop_filter)

  4425.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  4426. 

  4427.     /* This is intentionally mb_height and not end_mb_y - unlike in advanced

  4428.      * profile, these only differ are when decoding MSS2 rectangles. */

  4429.     ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);

  4430. }

  4431. 

  4432. /** Decode blocks of I-frame for advanced profile

  4433.  */

  4434. static void vc1_decode_i_blocks_adv(VC1Context *v)

  4435. {

  4436.     int k;

  4437.     MpegEncContext *s = &v->s;

  4438.     int cbp, val;

  4439.     uint8_t *coded_val;

  4440.     int mb_pos;

  4441.     int mquant = v->pq;

  4442.     int mqdiff;

  4443.     GetBitContext *gb = &s->gb;

  4444. 

  4445.     /* select codingmode used for VLC tables selection */

  4446.     switch (v->y_ac_table_index) {

  4447.     case 0:

  4448.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4449.         break;

  4450.     case 1:

  4451.         v->codingset = CS_HIGH_MOT_INTRA;

  4452.         break;

  4453.     case 2:

  4454.         v->codingset = CS_MID_RATE_INTRA;

  4455.         break;

  4456.     }

  4457. 

  4458.     switch (v->c_ac_table_index) {

  4459.     case 0:

  4460.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4461.         break;

  4462.     case 1:

  4463.         v->codingset2 = CS_HIGH_MOT_INTER;

  4464.         break;

  4465.     case 2:

  4466.         v->codingset2 = CS_MID_RATE_INTER;

  4467.         break;

  4468.     }

  4469. 

  4470.     // do frame decode

  4471.     s->mb_x             = s->mb_y = 0;

  4472.     s->mb_intra         = 1;

  4473.     s->first_slice_line = 1;

  4474.     s->mb_y             = s->start_mb_y;

  4475.     if (s->start_mb_y) {

  4476.         s->mb_x = 0;

  4477.         init_block_index(v);

  4478.         memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,

  4479.                (1 + s->b8_stride) * sizeof(*s->coded_block));

  4480.     }

  4481.     for (; s->mb_y < s->end_mb_y; s->mb_y++) {

  4482.         s->mb_x = 0;

  4483.         init_block_index(v);

  4484.         for (;s->mb_x < s->mb_width; s->mb_x++) {

  4485.             int16_t (*block)[64] = v->block[v->cur_blk_idx];

  4486.             ff_update_block_index(s);

  4487.             s->dsp.clear_blocks(block[0]);

  4488.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4489.             s->current_picture.mb_type[mb_pos + v->mb_off]                         = MB_TYPE_INTRA;

  4490.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  4491.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  4492. 

  4493.             // do actual MB decoding and displaying

  4494.             if (v->fieldtx_is_raw)

  4495.                 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);

  4496.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  4497.             if ( v->acpred_is_raw)

  4498.                 v->s.ac_pred = get_bits1(&v->s.gb);

  4499.             else

  4500.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  4501. 

  4502.             if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)

  4503.                 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);

  4504. 

  4505.             GET_MQUANT();

  4506. 

  4507.             s->current_picture.qscale_table[mb_pos] = mquant;

  4508.             /* Set DC scale - y and c use the same */

  4509.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  4510.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  4511. 

  4512.             for (k = 0; k < 6; k++) {

  4513.                 val = ((cbp >> (5 - k)) & 1);

  4514. 

  4515.                 if (k < 4) {

  4516.                     int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);

  4517.                     val        = val ^ pred;

  4518.                     *coded_val = val;

  4519.                 }

  4520.                 cbp |= val << (5 - k);

  4521. 

  4522.                 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);

  4523.                 v->c_avail = !!s->mb_x || (k == 1 || k == 3);

  4524. 

  4525.                 vc1_decode_i_block_adv(v, block[k], k, val,

  4526.                                        (k < 4) ? v->codingset : v->codingset2, mquant);

  4527. 

  4528.                 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))

  4529.                     continue;

  4530.                 v->vc1dsp.vc1_inv_trans_8x8(block[k]);

  4531.             }

  4532. 

  4533.             vc1_smooth_overlap_filter_iblk(v);

  4534.             vc1_put_signed_blocks_clamped(v);

  4535.             if (v->s.loop_filter) vc1_loop_filter_iblk_delayed(v, v->pq);

  4536. 

  4537.             if (get_bits_count(&s->gb) > v->bits) {

  4538.                 // TODO: may need modification to handle slice coding

  4539.                 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);

  4540.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",

  4541.                        get_bits_count(&s->gb), v->bits);

  4542.                 return;

  4543.             }

  4544.         }

  4545.         if (!v->s.loop_filter)

  4546.             ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  4547.         else if (s->mb_y)

  4548.             ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);

  4549.         s->first_slice_line = 0;

  4550.     }

  4551. 

  4552.     /* raw bottom MB row */

  4553.     s->mb_x = 0;

  4554.     init_block_index(v);

  4555. 

  4556.     for (;s->mb_x < s->mb_width; s->mb_x++) {

  4557.         ff_update_block_index(s);

  4558.         vc1_put_signed_blocks_clamped(v);

  4559.         if (v->s.loop_filter)

  4560.             vc1_loop_filter_iblk_delayed(v, v->pq);

  4561.     }

  4562.     if (v->s.loop_filter)

  4563.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y-1)*16, 16);

  4564.     ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  4565.                     (s->end_mb_y << v->field_mode) - 1, ER_MB_END);

  4566. }

  4567. 

  4568. static void vc1_decode_p_blocks(VC1Context *v)

  4569. {

  4570.     MpegEncContext *s = &v->s;

  4571.     int apply_loop_filter;

  4572. 

  4573.     /* select codingmode used for VLC tables selection */

  4574.     switch (v->c_ac_table_index) {

  4575.     case 0:

  4576.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4577.         break;

  4578.     case 1:

  4579.         v->codingset = CS_HIGH_MOT_INTRA;

  4580.         break;

  4581.     case 2:

  4582.         v->codingset = CS_MID_RATE_INTRA;

  4583.         break;

  4584.     }

  4585. 

  4586.     switch (v->c_ac_table_index) {

  4587.     case 0:

  4588.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4589.         break;

  4590.     case 1:

  4591.         v->codingset2 = CS_HIGH_MOT_INTER;

  4592.         break;

  4593.     case 2:

  4594.         v->codingset2 = CS_MID_RATE_INTER;

  4595.         break;

  4596.     }

  4597. 

  4598.     apply_loop_filter   = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY) &&

  4599.                           v->fcm == PROGRESSIVE;

  4600.     s->first_slice_line = 1;

  4601.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  4602.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  4603.         s->mb_x = 0;

  4604.         init_block_index(v);

  4605.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  4606.             ff_update_block_index(s);

  4607. 

  4608.             if (v->fcm == ILACE_FIELD)

  4609.                 vc1_decode_p_mb_intfi(v);

  4610.             else if (v->fcm == ILACE_FRAME)

  4611.                 vc1_decode_p_mb_intfr(v);

  4612.             else vc1_decode_p_mb(v);

  4613.             if (s->mb_y != s->start_mb_y && apply_loop_filter)

  4614.                 vc1_apply_p_loop_filter(v);

  4615.             if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  4616.                 // TODO: may need modification to handle slice coding

  4617.                 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);

  4618.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",

  4619.                        get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);

  4620.                 return;

  4621.             }

  4622.         }

  4623.         memmove(v->cbp_base,      v->cbp,      sizeof(v->cbp_base[0])      * s->mb_stride);

  4624.         memmove(v->ttblk_base,    v->ttblk,    sizeof(v->ttblk_base[0])    * s->mb_stride);

  4625.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);

  4626.         memmove(v->luma_mv_base,  v->luma_mv,  sizeof(v->luma_mv_base[0])  * s->mb_stride);

  4627.         if (s->mb_y != s->start_mb_y) ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  4628.         s->first_slice_line = 0;

  4629.     }

  4630.     if (apply_loop_filter) {

  4631.         s->mb_x = 0;

  4632.         init_block_index(v);

  4633.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  4634.             ff_update_block_index(s);

  4635.             vc1_apply_p_loop_filter(v);

  4636.         }

  4637.     }

  4638.     if (s->end_mb_y >= s->start_mb_y)

  4639.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  4640.     ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  4641.                     (s->end_mb_y << v->field_mode) - 1, ER_MB_END);

  4642. }

  4643. 

  4644. static void vc1_decode_b_blocks(VC1Context *v)

  4645. {

  4646.     MpegEncContext *s = &v->s;

  4647. 

  4648.     /* select codingmode used for VLC tables selection */

  4649.     switch (v->c_ac_table_index) {

  4650.     case 0:

  4651.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4652.         break;

  4653.     case 1:

  4654.         v->codingset = CS_HIGH_MOT_INTRA;

  4655.         break;

  4656.     case 2:

  4657.         v->codingset = CS_MID_RATE_INTRA;

  4658.         break;

  4659.     }

  4660. 

  4661.     switch (v->c_ac_table_index) {

  4662.     case 0:

  4663.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4664.         break;

  4665.     case 1:

  4666.         v->codingset2 = CS_HIGH_MOT_INTER;

  4667.         break;

  4668.     case 2:

  4669.         v->codingset2 = CS_MID_RATE_INTER;

  4670.         break;

  4671.     }

  4672. 

  4673.     s->first_slice_line = 1;

  4674.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  4675.         s->mb_x = 0;

  4676.         init_block_index(v);

  4677.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  4678.             ff_update_block_index(s);

  4679. 

  4680.             if (v->fcm == ILACE_FIELD)

  4681.                 vc1_decode_b_mb_intfi(v);

  4682.             else

  4683.                 vc1_decode_b_mb(v);

  4684.             if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  4685.                 // TODO: may need modification to handle slice coding

  4686.                 ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);

  4687.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",

  4688.                        get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);

  4689.                 return;

  4690.             }

  4691.             if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);

  4692.         }

  4693.         if (!v->s.loop_filter)

  4694.             ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  4695.         else if (s->mb_y)

  4696.             ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  4697.         s->first_slice_line = 0;

  4698.     }

  4699.     if (v->s.loop_filter)

  4700.         ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  4701.     ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  4702.                     (s->end_mb_y << v->field_mode) - 1, ER_MB_END);

  4703. }

  4704. 

  4705. static void vc1_decode_skip_blocks(VC1Context *v)

  4706. {

  4707.     MpegEncContext *s = &v->s;

  4708. 

  4709.     ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);

  4710.     s->first_slice_line = 1;

  4711.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  4712.         s->mb_x = 0;

  4713.         init_block_index(v);

  4714.         ff_update_block_index(s);

  4715.         memcpy(s->dest[0], s->last_picture.f.data[0] + s->mb_y * 16 * s->linesize,   s->linesize   * 16);

  4716.         memcpy(s->dest[1], s->last_picture.f.data[1] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);

  4717.         memcpy(s->dest[2], s->last_picture.f.data[2] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);

  4718.         ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);

  4719.         s->first_slice_line = 0;

  4720.     }

  4721.     s->pict_type = AV_PICTURE_TYPE_P;

  4722. }

  4723. 

  4724. void ff_vc1_decode_blocks(VC1Context *v)

  4725. {

  4726. 

  4727.     v->s.esc3_level_length = 0;

  4728.     if (v->x8_type) {

  4729.         ff_intrax8_decode_picture(&v->x8, 2*v->pq + v->halfpq, v->pq * !v->pquantizer);

  4730.     } else {

  4731.         v->cur_blk_idx     =  0;

  4732.         v->left_blk_idx    = -1;

  4733.         v->topleft_blk_idx =  1;

  4734.         v->top_blk_idx     =  2;

  4735.         switch (v->s.pict_type) {

  4736.         case AV_PICTURE_TYPE_I:

  4737.             if (v->profile == PROFILE_ADVANCED)

  4738.                 vc1_decode_i_blocks_adv(v);

  4739.             else

  4740.                 vc1_decode_i_blocks(v);

  4741.             break;

  4742.         case AV_PICTURE_TYPE_P:

  4743.             if (v->p_frame_skipped)

  4744.                 vc1_decode_skip_blocks(v);

  4745.             else

  4746.                 vc1_decode_p_blocks(v);

  4747.             break;

  4748.         case AV_PICTURE_TYPE_B:

  4749.             if (v->bi_type) {

  4750.                 if (v->profile == PROFILE_ADVANCED)

  4751.                     vc1_decode_i_blocks_adv(v);

  4752.                 else

  4753.                     vc1_decode_i_blocks(v);

  4754.             } else

  4755.                 vc1_decode_b_blocks(v);

  4756.             break;

  4757.         }

  4758.     }

  4759. }

  4760. 

  4761. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  4762. 

  4763. typedef struct {

  4764.     /**

  4765.      * Transform coefficients for both sprites in 16.16 fixed point format,

  4766.      * in the order they appear in the bitstream:

  4767.      *  x scale

  4768.      *  rotation 1 (unused)

  4769.      *  x offset

  4770.      *  rotation 2 (unused)

  4771.      *  y scale

  4772.      *  y offset

  4773.      *  alpha

  4774.      */

  4775.     int coefs[2][7];

  4776. 

  4777.     int effect_type, effect_flag;

  4778.     int effect_pcount1, effect_pcount2;   ///< amount of effect parameters stored in effect_params

  4779.     int effect_params1[15], effect_params2[10]; ///< effect parameters in 16.16 fixed point format

  4780. } SpriteData;

  4781. 

  4782. static inline int get_fp_val(GetBitContext* gb)

  4783. {

  4784.     return (get_bits_long(gb, 30) - (1 << 29)) << 1;

  4785. }

  4786. 

  4787. static void vc1_sprite_parse_transform(GetBitContext* gb, int c[7])

  4788. {

  4789.     c[1] = c[3] = 0;

  4790. 

  4791.     switch (get_bits(gb, 2)) {

  4792.     case 0:

  4793.         c[0] = 1 << 16;

  4794.         c[2] = get_fp_val(gb);

  4795.         c[4] = 1 << 16;

  4796.         break;

  4797.     case 1:

  4798.         c[0] = c[4] = get_fp_val(gb);

  4799.         c[2] = get_fp_val(gb);

  4800.         break;

  4801.     case 2:

  4802.         c[0] = get_fp_val(gb);

  4803.         c[2] = get_fp_val(gb);

  4804.         c[4] = get_fp_val(gb);

  4805.         break;

  4806.     case 3:

  4807.         c[0] = get_fp_val(gb);

  4808.         c[1] = get_fp_val(gb);

  4809.         c[2] = get_fp_val(gb);

  4810.         c[3] = get_fp_val(gb);

  4811.         c[4] = get_fp_val(gb);

  4812.         break;

  4813.     }

  4814.     c[5] = get_fp_val(gb);

  4815.     if (get_bits1(gb))

  4816.         c[6] = get_fp_val(gb);

  4817.     else

  4818.         c[6] = 1 << 16;

  4819. }

  4820. 

  4821. static void vc1_parse_sprites(VC1Context *v, GetBitContext* gb, SpriteData* sd)

  4822. {

  4823.     AVCodecContext *avctx = v->s.avctx;

  4824.     int sprite, i;

  4825. 

  4826.     for (sprite = 0; sprite <= v->two_sprites; sprite++) {

  4827.         vc1_sprite_parse_transform(gb, sd->coefs[sprite]);

  4828.         if (sd->coefs[sprite][1] || sd->coefs[sprite][3])

  4829.             avpriv_request_sample(avctx, "Non-zero rotation coefficients");

  4830.         av_log(avctx, AV_LOG_DEBUG, sprite ? "S2:" : "S1:");

  4831.         for (i = 0; i < 7; i++)

  4832.             av_log(avctx, AV_LOG_DEBUG, " %d.%.3d",

  4833.                    sd->coefs[sprite][i] / (1<<16),

  4834.                    (abs(sd->coefs[sprite][i]) & 0xFFFF) * 1000 / (1 << 16));

  4835.         av_log(avctx, AV_LOG_DEBUG, "\n");

  4836.     }

  4837. 

  4838.     skip_bits(gb, 2);

  4839.     if (sd->effect_type = get_bits_long(gb, 30)) {

  4840.         switch (sd->effect_pcount1 = get_bits(gb, 4)) {

  4841.         case 7:

  4842.             vc1_sprite_parse_transform(gb, sd->effect_params1);

  4843.             break;

  4844.         case 14:

  4845.             vc1_sprite_parse_transform(gb, sd->effect_params1);

  4846.             vc1_sprite_parse_transform(gb, sd->effect_params1 + 7);

  4847.             break;

  4848.         default:

  4849.             for (i = 0; i < sd->effect_pcount1; i++)

  4850.                 sd->effect_params1[i] = get_fp_val(gb);

  4851.         }

  4852.         if (sd->effect_type != 13 || sd->effect_params1[0] != sd->coefs[0][6]) {

  4853.             // effect 13 is simple alpha blending and matches the opacity above

  4854.             av_log(avctx, AV_LOG_DEBUG, "Effect: %d; params: ", sd->effect_type);

  4855.             for (i = 0; i < sd->effect_pcount1; i++)

  4856.                 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",

  4857.                        sd->effect_params1[i] / (1 << 16),

  4858.                        (abs(sd->effect_params1[i]) & 0xFFFF) * 1000 / (1 << 16));

  4859.             av_log(avctx, AV_LOG_DEBUG, "\n");

  4860.         }

  4861. 

  4862.         sd->effect_pcount2 = get_bits(gb, 16);

  4863.         if (sd->effect_pcount2 > 10) {

  4864.             av_log(avctx, AV_LOG_ERROR, "Too many effect parameters\n");

  4865.             return;

  4866.         } else if (sd->effect_pcount2) {

  4867.             i = -1;

  4868.             av_log(avctx, AV_LOG_DEBUG, "Effect params 2: ");

  4869.             while (++i < sd->effect_pcount2) {

  4870.                 sd->effect_params2[i] = get_fp_val(gb);

  4871.                 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",

  4872.                        sd->effect_params2[i] / (1 << 16),

  4873.                        (abs(sd->effect_params2[i]) & 0xFFFF) * 1000 / (1 << 16));

  4874.             }

  4875.             av_log(avctx, AV_LOG_DEBUG, "\n");

  4876.         }

  4877.     }

  4878.     if (sd->effect_flag = get_bits1(gb))

  4879.         av_log(avctx, AV_LOG_DEBUG, "Effect flag set\n");

  4880. 

  4881.     if (get_bits_count(gb) >= gb->size_in_bits +

  4882.        (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE ? 64 : 0))

  4883.         av_log(avctx, AV_LOG_ERROR, "Buffer overrun\n");

  4884.     if (get_bits_count(gb) < gb->size_in_bits - 8)

  4885.         av_log(avctx, AV_LOG_WARNING, "Buffer not fully read\n");

  4886. }

  4887. 

  4888. static void vc1_draw_sprites(VC1Context *v, SpriteData* sd)

  4889. {

  4890.     int i, plane, row, sprite;

  4891.     int sr_cache[2][2] = { { -1, -1 }, { -1, -1 } };

  4892.     uint8_t* src_h[2][2];

  4893.     int xoff[2], xadv[2], yoff[2], yadv[2], alpha;

  4894.     int ysub[2];

  4895.     MpegEncContext *s = &v->s;

  4896. 

  4897.     for (i = 0; i < 2; i++) {

  4898.         xoff[i] = av_clip(sd->coefs[i][2], 0, v->sprite_width-1 << 16);

  4899.         xadv[i] = sd->coefs[i][0];

  4900.         if (xadv[i] != 1<<16 || (v->sprite_width << 16) - (v->output_width << 16) - xoff[i])

  4901.             xadv[i] = av_clip(xadv[i], 0, ((v->sprite_width<<16) - xoff[i] - 1) / v->output_width);

  4902. 

  4903.         yoff[i] = av_clip(sd->coefs[i][5], 0, v->sprite_height-1 << 16);

  4904.         yadv[i] = av_clip(sd->coefs[i][4], 0, ((v->sprite_height << 16) - yoff[i]) / v->output_height);

  4905.     }

  4906.     alpha = av_clip(sd->coefs[1][6], 0, (1<<16) - 1);

  4907. 

  4908.     for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++) {

  4909.         int width = v->output_width>>!!plane;

  4910. 

  4911.         for (row = 0; row < v->output_height>>!!plane; row++) {

  4912.             uint8_t *dst = v->sprite_output_frame.data[plane] +

  4913.                            v->sprite_output_frame.linesize[plane] * row;

  4914. 

  4915.             for (sprite = 0; sprite <= v->two_sprites; sprite++) {

  4916.                 uint8_t *iplane = s->current_picture.f.data[plane];

  4917.                 int      iline  = s->current_picture.f.linesize[plane];

  4918.                 int      ycoord = yoff[sprite] + yadv[sprite] * row;

  4919.                 int      yline  = ycoord >> 16;

  4920.                 int      next_line;

  4921.                 ysub[sprite] = ycoord & 0xFFFF;

  4922.                 if (sprite) {

  4923.                     iplane = s->last_picture.f.data[plane];

  4924.                     iline  = s->last_picture.f.linesize[plane];

  4925.                 }

  4926.                 next_line = FFMIN(yline + 1, (v->sprite_height >> !!plane) - 1) * iline;

  4927.                 if (!(xoff[sprite] & 0xFFFF) && xadv[sprite] == 1 << 16) {

  4928.                         src_h[sprite][0] = iplane + (xoff[sprite] >> 16) +  yline      * iline;

  4929.                     if (ysub[sprite])

  4930.                         src_h[sprite][1] = iplane + (xoff[sprite] >> 16) + next_line;

  4931.                 } else {

  4932.                     if (sr_cache[sprite][0] != yline) {

  4933.                         if (sr_cache[sprite][1] == yline) {

  4934.                             FFSWAP(uint8_t*, v->sr_rows[sprite][0], v->sr_rows[sprite][1]);

  4935.                             FFSWAP(int,        sr_cache[sprite][0],   sr_cache[sprite][1]);

  4936.                         } else {

  4937.                             v->vc1dsp.sprite_h(v->sr_rows[sprite][0], iplane + yline * iline, xoff[sprite], xadv[sprite], width);

  4938.                             sr_cache[sprite][0] = yline;

  4939.                         }

  4940.                     }

  4941.                     if (ysub[sprite] && sr_cache[sprite][1] != yline + 1) {

  4942.                         v->vc1dsp.sprite_h(v->sr_rows[sprite][1],

  4943.                                            iplane + next_line, xoff[sprite],

  4944.                                            xadv[sprite], width);

  4945.                         sr_cache[sprite][1] = yline + 1;

  4946.                     }

  4947.                     src_h[sprite][0] = v->sr_rows[sprite][0];

  4948.                     src_h[sprite][1] = v->sr_rows[sprite][1];

  4949.                 }

  4950.             }

  4951. 

  4952.             if (!v->two_sprites) {

  4953.                 if (ysub[0]) {

  4954.                     v->vc1dsp.sprite_v_single(dst, src_h[0][0], src_h[0][1], ysub[0], width);

  4955.                 } else {

  4956.                     memcpy(dst, src_h[0][0], width);

  4957.                 }

  4958.             } else {

  4959.                 if (ysub[0] && ysub[1]) {

  4960.                     v->vc1dsp.sprite_v_double_twoscale(dst, src_h[0][0], src_h[0][1], ysub[0],

  4961.                                                        src_h[1][0], src_h[1][1], ysub[1], alpha, width);

  4962.                 } else if (ysub[0]) {

  4963.                     v->vc1dsp.sprite_v_double_onescale(dst, src_h[0][0], src_h[0][1], ysub[0],

  4964.                                                        src_h[1][0], alpha, width);

  4965.                 } else if (ysub[1]) {

  4966.                     v->vc1dsp.sprite_v_double_onescale(dst, src_h[1][0], src_h[1][1], ysub[1],

  4967.                                                        src_h[0][0], (1<<16)-1-alpha, width);

  4968.                 } else {

  4969.                     v->vc1dsp.sprite_v_double_noscale(dst, src_h[0][0], src_h[1][0], alpha, width);

  4970.                 }

  4971.             }

  4972.         }

  4973. 

  4974.         if (!plane) {

  4975.             for (i = 0; i < 2; i++) {

  4976.                 xoff[i] >>= 1;

  4977.                 yoff[i] >>= 1;

  4978.             }

  4979.         }

  4980. 

  4981.     }

  4982. }

  4983. 

  4984. 

  4985. static int vc1_decode_sprites(VC1Context *v, GetBitContext* gb)

  4986. {

  4987.     MpegEncContext *s     = &v->s;

  4988.     AVCodecContext *avctx = s->avctx;

  4989.     SpriteData sd;

  4990. 

  4991.     vc1_parse_sprites(v, gb, &sd);

  4992. 

  4993.     if (!s->current_picture.f.data[0]) {

  4994.         av_log(avctx, AV_LOG_ERROR, "Got no sprites\n");

  4995.         return -1;

  4996.     }

  4997. 

  4998.     if (v->two_sprites && (!s->last_picture_ptr || !s->last_picture.f.data[0])) {

  4999.         av_log(avctx, AV_LOG_WARNING, "Need two sprites, only got one\n");

  5000.         v->two_sprites = 0;

  5001.     }

  5002. 

  5003.     av_frame_unref(&v->sprite_output_frame);

  5004.     if (ff_get_buffer(avctx, &v->sprite_output_frame, 0) < 0) {

  5005.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  5006.         return -1;

  5007.     }

  5008. 

  5009.     vc1_draw_sprites(v, &sd);

  5010. 

  5011.     return 0;

  5012. }

  5013. 

  5014. static void vc1_sprite_flush(AVCodecContext *avctx)

  5015. {

  5016.     VC1Context *v     = avctx->priv_data;

  5017.     MpegEncContext *s = &v->s;

  5018.     AVFrame *f = &s->current_picture.f;

  5019.     int plane, i;

  5020. 

  5021.     /* Windows Media Image codecs have a convergence interval of two keyframes.

  5022.        Since we can't enforce it, clear to black the missing sprite. This is

  5023.        wrong but it looks better than doing nothing. */

  5024. 

  5025.     if (f->data[0])

  5026.         for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++)

  5027.             for (i = 0; i < v->sprite_height>>!!plane; i++)

  5028.                 memset(f->data[plane] + i * f->linesize[plane],

  5029.                        plane ? 128 : 0, f->linesize[plane]);

  5030. }

  5031. 

  5032. #endif

  5033. 

  5034. av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)

  5035. {

  5036.     MpegEncContext *s = &v->s;

  5037.     int i;

  5038. 

  5039.     /* Allocate mb bitplanes */

  5040.     v->mv_type_mb_plane = av_malloc (s->mb_stride * s->mb_height);

  5041.     v->direct_mb_plane  = av_malloc (s->mb_stride * s->mb_height);

  5042.     v->forward_mb_plane = av_malloc (s->mb_stride * s->mb_height);

  5043.     v->fieldtx_plane    = av_mallocz(s->mb_stride * s->mb_height);

  5044.     v->acpred_plane     = av_malloc (s->mb_stride * s->mb_height);

  5045.     v->over_flags_plane = av_malloc (s->mb_stride * s->mb_height);

  5046. 

  5047.     v->n_allocated_blks = s->mb_width + 2;

  5048.     v->block            = av_malloc(sizeof(*v->block) * v->n_allocated_blks);

  5049.     v->cbp_base         = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  5050.     v->cbp              = v->cbp_base + s->mb_stride;

  5051.     v->ttblk_base       = av_malloc(sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);

  5052.     v->ttblk            = v->ttblk_base + s->mb_stride;

  5053.     v->is_intra_base    = av_mallocz(sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);

  5054.     v->is_intra         = v->is_intra_base + s->mb_stride;

  5055.     v->luma_mv_base     = av_malloc(sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);

  5056.     v->luma_mv          = v->luma_mv_base + s->mb_stride;

  5057. 

  5058.     /* allocate block type info in that way so it could be used with s->block_index[] */

  5059.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5060.     v->mb_type[0]   = v->mb_type_base + s->b8_stride + 1;

  5061.     v->mb_type[1]   = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  5062.     v->mb_type[2]   = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  5063. 

  5064.     /* allocate memory to store block level MV info */

  5065.     v->blk_mv_type_base = av_mallocz(     s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5066.     v->blk_mv_type      = v->blk_mv_type_base + s->b8_stride + 1;

  5067.     v->mv_f_base        = av_mallocz(2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5068.     v->mv_f[0]          = v->mv_f_base + s->b8_stride + 1;

  5069.     v->mv_f[1]          = v->mv_f[0] + (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5070.     v->mv_f_last_base   = av_mallocz(2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5071.     v->mv_f_last[0]     = v->mv_f_last_base + s->b8_stride + 1;

  5072.     v->mv_f_last[1]     = v->mv_f_last[0] + (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5073.     v->mv_f_next_base   = av_mallocz(2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5074.     v->mv_f_next[0]     = v->mv_f_next_base + s->b8_stride + 1;

  5075.     v->mv_f_next[1]     = v->mv_f_next[0] + (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5076. 

  5077.     /* Init coded blocks info */

  5078.     if (v->profile == PROFILE_ADVANCED) {

  5079. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  5080. //            return -1;

  5081. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  5082. //            return -1;

  5083.     }

  5084. 

  5085.     ff_intrax8_common_init(&v->x8,s);

  5086. 

  5087.     if (s->avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || s->avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5088.         for (i = 0; i < 4; i++)

  5089.             if (!(v->sr_rows[i >> 1][i & 1] = av_malloc(v->output_width))) return -1;

  5090.     }

  5091. 

  5092.     if (!v->mv_type_mb_plane || !v->direct_mb_plane || !v->acpred_plane || !v->over_flags_plane ||

  5093.         !v->block || !v->cbp_base || !v->ttblk_base || !v->is_intra_base || !v->luma_mv_base ||

  5094.         !v->mb_type_base)

  5095.             return -1;

  5096. 

  5097.     return 0;

  5098. }

  5099. 

  5100. av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)

  5101. {

  5102.     int i;

  5103.     for (i = 0; i < 64; i++) {

  5104. #define transpose(x) ((x >> 3) | ((x & 7) << 3))

  5105.         v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);

  5106.         v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);

  5107.         v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);

  5108.         v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]);

  5109.         v->zzi_8x8[i]   = transpose(ff_vc1_adv_interlaced_8x8_zz[i]);

  5110.     }

  5111.     v->left_blk_sh = 0;

  5112.     v->top_blk_sh  = 3;

  5113. }

  5114. 

  5115. /** Initialize a VC1/WMV3 decoder

  5116.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  5117.  * @todo TODO: Decypher remaining bits in extra_data

  5118.  */

  5119. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  5120. {

  5121.     VC1Context *v = avctx->priv_data;

  5122.     MpegEncContext *s = &v->s;

  5123.     GetBitContext gb;

  5124. 

  5125.     /* save the container output size for WMImage */

  5126.     v->output_width  = avctx->width;

  5127.     v->output_height = avctx->height;

  5128. 

  5129.     if (!avctx->extradata_size || !avctx->extradata)

  5130.         return -1;

  5131.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  5132.         avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);

  5133.     else

  5134.         avctx->pix_fmt = AV_PIX_FMT_GRAY8;

  5135.     avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);

  5136.     v->s.avctx = avctx;

  5137.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  5138.     v->s.flags   |= CODEC_FLAG_EMU_EDGE;

  5139. 

  5140.     if (ff_vc1_init_common(v) < 0)

  5141.         return -1;

  5142.     ff_h264chroma_init(&v->h264chroma, 8);

  5143.     ff_vc1dsp_init(&v->vc1dsp);

  5144. 

  5145.     if (avctx->codec_id == AV_CODEC_ID_WMV3 || avctx->codec_id == AV_CODEC_ID_WMV3IMAGE) {

  5146.         int count = 0;

  5147. 

  5148.         // looks like WMV3 has a sequence header stored in the extradata

  5149.         // advanced sequence header may be before the first frame

  5150.         // the last byte of the extradata is a version number, 1 for the

  5151.         // samples we can decode

  5152. 

  5153.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  5154. 

  5155.         if (ff_vc1_decode_sequence_header(avctx, v, &gb) < 0)

  5156.           return -1;

  5157. 

  5158.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  5159.         if (count > 0) {

  5160.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  5161.                    count, get_bits(&gb, count));

  5162.         } else if (count < 0) {

  5163.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  5164.         }

  5165.     } else { // VC1/WVC1/WVP2

  5166.         const uint8_t *start = avctx->extradata;

  5167.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  5168.         const uint8_t *next;

  5169.         int size, buf2_size;

  5170.         uint8_t *buf2 = NULL;

  5171.         int seq_initialized = 0, ep_initialized = 0;

  5172. 

  5173.         if (avctx->extradata_size < 16) {

  5174.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  5175.             return -1;

  5176.         }

  5177. 

  5178.         buf2  = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5179.         start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv

  5180.         next  = start;

  5181.         for (; next < end; start = next) {

  5182.             next = find_next_marker(start + 4, end);

  5183.             size = next - start - 4;

  5184.             if (size <= 0)

  5185.                 continue;

  5186.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  5187.             init_get_bits(&gb, buf2, buf2_size * 8);

  5188.             switch (AV_RB32(start)) {

  5189.             case VC1_CODE_SEQHDR:

  5190.                 if (ff_vc1_decode_sequence_header(avctx, v, &gb) < 0) {

  5191.                     av_free(buf2);

  5192.                     return -1;

  5193.                 }

  5194.                 seq_initialized = 1;

  5195.                 break;

  5196.             case VC1_CODE_ENTRYPOINT:

  5197.                 if (ff_vc1_decode_entry_point(avctx, v, &gb) < 0) {

  5198.                     av_free(buf2);

  5199.                     return -1;

  5200.                 }

  5201.                 ep_initialized = 1;

  5202.                 break;

  5203.             }

  5204.         }

  5205.         av_free(buf2);

  5206.         if (!seq_initialized || !ep_initialized) {

  5207.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  5208.             return -1;

  5209.         }

  5210.         v->res_sprite = (avctx->codec_id == AV_CODEC_ID_VC1IMAGE);

  5211.     }

  5212. 

  5213.     avctx->profile = v->profile;

  5214.     if (v->profile == PROFILE_ADVANCED)

  5215.         avctx->level = v->level;

  5216. 

  5217.     avctx->has_b_frames = !!avctx->max_b_frames;

  5218. 

  5219.     s->mb_width  = (avctx->coded_width  + 15) >> 4;

  5220.     s->mb_height = (avctx->coded_height + 15) >> 4;

  5221. 

  5222.     if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {

  5223.         ff_vc1_init_transposed_scantables(v);

  5224.     } else {

  5225.         memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64);

  5226.         v->left_blk_sh = 3;

  5227.         v->top_blk_sh  = 0;

  5228.     }

  5229. 

  5230.     if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5231.         v->sprite_width  = avctx->coded_width;

  5232.         v->sprite_height = avctx->coded_height;

  5233. 

  5234.         avctx->coded_width  = avctx->width  = v->output_width;

  5235.         avctx->coded_height = avctx->height = v->output_height;

  5236. 

  5237.         // prevent 16.16 overflows

  5238.         if (v->sprite_width  > 1 << 14 ||

  5239.             v->sprite_height > 1 << 14 ||

  5240.             v->output_width  > 1 << 14 ||

  5241.             v->output_height > 1 << 14) return -1;

  5242.     }

  5243.     return 0;

  5244. }

  5245. 

  5246. /** Close a VC1/WMV3 decoder

  5247.  * @warning Initial try at using MpegEncContext stuff

  5248.  */

  5249. av_cold int ff_vc1_decode_end(AVCodecContext *avctx)

  5250. {

  5251.     VC1Context *v = avctx->priv_data;

  5252.     int i;

  5253. 

  5254.     av_frame_unref(&v->sprite_output_frame);

  5255. 

  5256.     for (i = 0; i < 4; i++)

  5257.         av_freep(&v->sr_rows[i >> 1][i & 1]);

  5258.     av_freep(&v->hrd_rate);

  5259.     av_freep(&v->hrd_buffer);

  5260.     ff_MPV_common_end(&v->s);

  5261.     av_freep(&v->mv_type_mb_plane);

  5262.     av_freep(&v->direct_mb_plane);

  5263.     av_freep(&v->forward_mb_plane);

  5264.     av_freep(&v->fieldtx_plane);

  5265.     av_freep(&v->acpred_plane);

  5266.     av_freep(&v->over_flags_plane);

  5267.     av_freep(&v->mb_type_base);

  5268.     av_freep(&v->blk_mv_type_base);

  5269.     av_freep(&v->mv_f_base);

  5270.     av_freep(&v->mv_f_last_base);

  5271.     av_freep(&v->mv_f_next_base);

  5272.     av_freep(&v->block);

  5273.     av_freep(&v->cbp_base);

  5274.     av_freep(&v->ttblk_base);

  5275.     av_freep(&v->is_intra_base); // FIXME use v->mb_type[]

  5276.     av_freep(&v->luma_mv_base);

  5277.     ff_intrax8_common_end(&v->x8);

  5278.     return 0;

  5279. }

  5280. 

  5281. 

  5282. /** Decode a VC1/WMV3 frame

  5283.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  5284.  */

  5285. static int vc1_decode_frame(AVCodecContext *avctx, void *data,

  5286.                             int *got_frame, AVPacket *avpkt)

  5287. {

  5288.     const uint8_t *buf = avpkt->data;

  5289.     int buf_size = avpkt->size, n_slices = 0, i, ret;

  5290.     VC1Context *v = avctx->priv_data;

  5291.     MpegEncContext *s = &v->s;

  5292.     AVFrame *pict = data;

  5293.     uint8_t *buf2 = NULL;

  5294.     const uint8_t *buf_start = buf;

  5295.     int mb_height, n_slices1;

  5296.     struct {

  5297.         uint8_t *buf;

  5298.         GetBitContext gb;

  5299.         int mby_start;

  5300.     } *slices = NULL, *tmp;

  5301. 

  5302.     /* no supplementary picture */

  5303.     if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == VC1_CODE_ENDOFSEQ)) {

  5304.         /* special case for last picture */

  5305.         if (s->low_delay == 0 && s->next_picture_ptr) {

  5306.             if ((ret = av_frame_ref(pict, &s->next_picture_ptr->f)) < 0)

  5307.                 return ret;

  5308.             s->next_picture_ptr = NULL;

  5309. 

  5310.             *got_frame = 1;

  5311.         }

  5312. 

  5313.         return 0;

  5314.     }

  5315. 

  5316.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) {

  5317.         if (v->profile < PROFILE_ADVANCED)

  5318.             avctx->pix_fmt = AV_PIX_FMT_VDPAU_WMV3;

  5319.         else

  5320.             avctx->pix_fmt = AV_PIX_FMT_VDPAU_VC1;

  5321.     }

  5322. 

  5323.     //for advanced profile we may need to parse and unescape data

  5324.     if (avctx->codec_id == AV_CODEC_ID_VC1 || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5325.         int buf_size2 = 0;

  5326.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5327. 

  5328.         if (IS_MARKER(AV_RB32(buf))) { /* frame starts with marker and needs to be parsed */

  5329.             const uint8_t *start, *end, *next;

  5330.             int size;

  5331. 

  5332.             next = buf;

  5333.             for (start = buf, end = buf + buf_size; next < end; start = next) {

  5334.                 next = find_next_marker(start + 4, end);

  5335.                 size = next - start - 4;

  5336.                 if (size <= 0) continue;

  5337.                 switch (AV_RB32(start)) {

  5338.                 case VC1_CODE_FRAME:

  5339.                     if (avctx->hwaccel ||

  5340.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  5341.                         buf_start = start;

  5342.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  5343.                     break;

  5344.                 case VC1_CODE_FIELD: {

  5345.                     int buf_size3;

  5346.                     tmp = av_realloc(slices, sizeof(*slices) * (n_slices+1));

  5347.                     if (!tmp)

  5348.                         goto err;

  5349.                     slices = tmp;

  5350.                     slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5351.                     if (!slices[n_slices].buf)

  5352.                         goto err;

  5353.                     buf_size3 = vc1_unescape_buffer(start + 4, size,

  5354.                                                     slices[n_slices].buf);

  5355.                     init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5356.                                   buf_size3 << 3);

  5357.                     /* assuming that the field marker is at the exact middle,

  5358.                        hope it's correct */

  5359.                     slices[n_slices].mby_start = s->mb_height >> 1;

  5360.                     n_slices1 = n_slices - 1; // index of the last slice of the first field

  5361.                     n_slices++;

  5362.                     break;

  5363.                 }

  5364.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  5365.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  5366.                     init_get_bits(&s->gb, buf2, buf_size2 * 8);

  5367.                     ff_vc1_decode_entry_point(avctx, v, &s->gb);

  5368.                     break;

  5369.                 case VC1_CODE_SLICE: {

  5370.                     int buf_size3;

  5371.                     tmp = av_realloc(slices, sizeof(*slices) * (n_slices+1));

  5372.                     if (!tmp)

  5373.                         goto err;

  5374.                     slices = tmp;

  5375.                     slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5376.                     if (!slices[n_slices].buf)

  5377.                         goto err;

  5378.                     buf_size3 = vc1_unescape_buffer(start + 4, size,

  5379.                                                     slices[n_slices].buf);

  5380.                     init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5381.                                   buf_size3 << 3);

  5382.                     slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);

  5383.                     n_slices++;

  5384.                     break;

  5385.                 }

  5386.                 }

  5387.             }

  5388.         } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */

  5389.             const uint8_t *divider;

  5390.             int buf_size3;

  5391. 

  5392.             divider = find_next_marker(buf, buf + buf_size);

  5393.             if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {

  5394.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  5395.                 goto err;

  5396.             } else { // found field marker, unescape second field

  5397.                 tmp = av_realloc(slices, sizeof(*slices) * (n_slices+1));

  5398.                 if (!tmp)

  5399.                     goto err;

  5400.                 slices = tmp;

  5401.                 slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5402.                 if (!slices[n_slices].buf)

  5403.                     goto err;

  5404.                 buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);

  5405.                 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5406.                               buf_size3 << 3);

  5407.                 slices[n_slices].mby_start = s->mb_height >> 1;

  5408.                 n_slices1 = n_slices - 1;

  5409.                 n_slices++;

  5410.             }

  5411.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  5412.         } else {

  5413.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  5414.         }

  5415.         init_get_bits(&s->gb, buf2, buf_size2*8);

  5416.     } else

  5417.         init_get_bits(&s->gb, buf, buf_size*8);

  5418. 

  5419.     if (v->res_sprite) {

  5420.         v->new_sprite  = !get_bits1(&s->gb);

  5421.         v->two_sprites =  get_bits1(&s->gb);

  5422.         /* res_sprite means a Windows Media Image stream, AV_CODEC_ID_*IMAGE means

  5423.            we're using the sprite compositor. These are intentionally kept separate

  5424.            so you can get the raw sprites by using the wmv3 decoder for WMVP or

  5425.            the vc1 one for WVP2 */

  5426.         if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5427.             if (v->new_sprite) {

  5428.                 // switch AVCodecContext parameters to those of the sprites

  5429.                 avctx->width  = avctx->coded_width  = v->sprite_width;

  5430.                 avctx->height = avctx->coded_height = v->sprite_height;

  5431.             } else {

  5432.                 goto image;

  5433.             }

  5434.         }

  5435.     }

  5436. 

  5437.     if (s->context_initialized &&

  5438.         (s->width  != avctx->coded_width ||

  5439.          s->height != avctx->coded_height)) {

  5440.         ff_vc1_decode_end(avctx);

  5441.     }

  5442. 

  5443.     if (!s->context_initialized) {

  5444.         if (ff_msmpeg4_decode_init(avctx) < 0 || ff_vc1_decode_init_alloc_tables(v) < 0)

  5445.             goto err;

  5446. 

  5447.         s->low_delay = !avctx->has_b_frames || v->res_sprite;

  5448. 

  5449.         if (v->profile == PROFILE_ADVANCED) {

  5450.             s->h_edge_pos = avctx->coded_width;

  5451.             s->v_edge_pos = avctx->coded_height;

  5452.         }

  5453.     }

  5454. 

  5455.     /* We need to set current_picture_ptr before reading the header,

  5456.      * otherwise we cannot store anything in there. */

  5457.     if (s->current_picture_ptr == NULL || s->current_picture_ptr->f.data[0]) {

  5458.         int i = ff_find_unused_picture(s, 0);

  5459.         if (i < 0)

  5460.             goto err;

  5461.         s->current_picture_ptr = &s->picture[i];

  5462.     }

  5463. 

  5464.     // do parse frame header

  5465.     v->pic_header_flag = 0;

  5466.     if (v->profile < PROFILE_ADVANCED) {

  5467.         if (ff_vc1_parse_frame_header(v, &s->gb) == -1) {

  5468.             goto err;

  5469.         }

  5470.     } else {

  5471.         if (ff_vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  5472.             goto err;

  5473.         }

  5474.     }

  5475. 

  5476.     if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)

  5477.         && s->pict_type != AV_PICTURE_TYPE_I) {

  5478.         av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");

  5479.         goto err;

  5480.     }

  5481. 

  5482.     // process pulldown flags

  5483.     s->current_picture_ptr->f.repeat_pict = 0;

  5484.     // Pulldown flags are only valid when 'broadcast' has been set.

  5485.     // So ticks_per_frame will be 2

  5486.     if (v->rff) {

  5487.         // repeat field

  5488.         s->current_picture_ptr->f.repeat_pict = 1;

  5489.     } else if (v->rptfrm) {

  5490.         // repeat frames

  5491.         s->current_picture_ptr->f.repeat_pict = v->rptfrm * 2;

  5492.     }

  5493. 

  5494.     // for skipping the frame

  5495.     s->current_picture.f.pict_type = s->pict_type;

  5496.     s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;

  5497. 

  5498.     /* skip B-frames if we don't have reference frames */

  5499.     if (s->last_picture_ptr == NULL && (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) {

  5500.         goto err;

  5501.     }

  5502.     if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||

  5503.         (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) ||

  5504.          avctx->skip_frame >= AVDISCARD_ALL) {

  5505.         goto end;

  5506.     }

  5507. 

  5508.     if (s->next_p_frame_damaged) {

  5509.         if (s->pict_type == AV_PICTURE_TYPE_B)

  5510.             goto end;

  5511.         else

  5512.             s->next_p_frame_damaged = 0;

  5513.     }

  5514. 

  5515.     if (ff_MPV_frame_start(s, avctx) < 0) {

  5516.         goto err;

  5517.     }

  5518. 

  5519.     s->me.qpel_put = s->dsp.put_qpel_pixels_tab;

  5520.     s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;

  5521. 

  5522.     if ((CONFIG_VC1_VDPAU_DECODER)

  5523.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  5524.         ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  5525.     else if (avctx->hwaccel) {

  5526.         if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)

  5527.             goto err;

  5528.         if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  5529.             goto err;

  5530.         if (avctx->hwaccel->end_frame(avctx) < 0)

  5531.             goto err;

  5532.     } else {

  5533.         ff_mpeg_er_frame_start(s);

  5534. 

  5535.         v->bits = buf_size * 8;

  5536.         v->end_mb_x = s->mb_width;

  5537.         if (v->field_mode) {

  5538.             uint8_t *tmp[2];

  5539.             s->current_picture.f.linesize[0] <<= 1;

  5540.             s->current_picture.f.linesize[1] <<= 1;

  5541.             s->current_picture.f.linesize[2] <<= 1;

  5542.             s->linesize                      <<= 1;

  5543.             s->uvlinesize                    <<= 1;

  5544.             tmp[0]          = v->mv_f_last[0];

  5545.             tmp[1]          = v->mv_f_last[1];

  5546.             v->mv_f_last[0] = v->mv_f_next[0];

  5547.             v->mv_f_last[1] = v->mv_f_next[1];

  5548.             v->mv_f_next[0] = v->mv_f[0];

  5549.             v->mv_f_next[1] = v->mv_f[1];

  5550.             v->mv_f[0] = tmp[0];

  5551.             v->mv_f[1] = tmp[1];

  5552.         }

  5553.         mb_height = s->mb_height >> v->field_mode;

  5554.         for (i = 0; i <= n_slices; i++) {

  5555.             if (i > 0 &&  slices[i - 1].mby_start >= mb_height) {

  5556.                 if (v->field_mode <= 0) {

  5557.                     av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "

  5558.                            "picture boundary (%d >= %d)\n", i,

  5559.                            slices[i - 1].mby_start, mb_height);

  5560.                     continue;

  5561.                 }

  5562.                 v->second_field = 1;

  5563.                 v->blocks_off   = s->mb_width  * s->mb_height << 1;

  5564.                 v->mb_off       = s->mb_stride * s->mb_height >> 1;

  5565.             } else {

  5566.                 v->second_field = 0;

  5567.                 v->blocks_off   = 0;

  5568.                 v->mb_off       = 0;

  5569.             }

  5570.             if (i) {

  5571.                 v->pic_header_flag = 0;

  5572.                 if (v->field_mode && i == n_slices1 + 2) {

  5573.                     if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {

  5574.                         av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");

  5575.                         continue;

  5576.                     }

  5577.                 } else if (get_bits1(&s->gb)) {

  5578.                     v->pic_header_flag = 1;

  5579.                     if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {

  5580.                         av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");

  5581.                         continue;

  5582.                     }

  5583.                 }

  5584.             }

  5585.             s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);

  5586.             if (!v->field_mode || v->second_field)

  5587.                 s->end_mb_y = (i == n_slices     ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);

  5588.             else

  5589.                 s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);

  5590.             ff_vc1_decode_blocks(v);

  5591.             if (i != n_slices)

  5592.                 s->gb = slices[i].gb;

  5593.         }

  5594.         if (v->field_mode) {

  5595.             v->second_field = 0;

  5596.             if (s->pict_type == AV_PICTURE_TYPE_B) {

  5597.                 memcpy(v->mv_f_base, v->mv_f_next_base,

  5598.                        2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5599.             }

  5600.             s->current_picture.f.linesize[0] >>= 1;

  5601.             s->current_picture.f.linesize[1] >>= 1;

  5602.             s->current_picture.f.linesize[2] >>= 1;

  5603.             s->linesize                      >>= 1;

  5604.             s->uvlinesize                    >>= 1;

  5605.         }

  5606.         av_dlog(s->avctx, "Consumed %i/%i bits\n",

  5607.                 get_bits_count(&s->gb), s->gb.size_in_bits);

  5608. //  if (get_bits_count(&s->gb) > buf_size * 8)

  5609. //      return -1;

  5610.         if (!v->field_mode)

  5611.             ff_er_frame_end(&s->er);

  5612.     }

  5613. 

  5614.     ff_MPV_frame_end(s);

  5615. 

  5616.     if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {

  5617. image:

  5618.         avctx->width  = avctx->coded_width  = v->output_width;

  5619.         avctx->height = avctx->coded_height = v->output_height;

  5620.         if (avctx->skip_frame >= AVDISCARD_NONREF)

  5621.             goto end;

  5622. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  5623.         if (vc1_decode_sprites(v, &s->gb))

  5624.             goto err;

  5625. #endif

  5626.         if ((ret = av_frame_ref(pict, &v->sprite_output_frame)) < 0)

  5627.             goto err;

  5628.         *got_frame = 1;

  5629.     } else {

  5630.         if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {

  5631.             if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)

  5632.                 goto err;

  5633.             ff_print_debug_info(s, s->current_picture_ptr);

  5634.         } else if (s->last_picture_ptr != NULL) {

  5635.             if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)

  5636.                 goto err;

  5637.             ff_print_debug_info(s, s->last_picture_ptr);

  5638.         }

  5639.         if (s->last_picture_ptr || s->low_delay) {

  5640.             *got_frame = 1;

  5641.         }

  5642.     }

  5643. 

  5644. end:

  5645.     av_free(buf2);

  5646.     for (i = 0; i < n_slices; i++)

  5647.         av_free(slices[i].buf);

  5648.     av_free(slices);

  5649.     return buf_size;

  5650. 

  5651. err:

  5652.     av_free(buf2);

  5653.     for (i = 0; i < n_slices; i++)

  5654.         av_free(slices[i].buf);

  5655.     av_free(slices);

  5656.     return -1;

  5657. }

  5658. 

  5659. 

  5660. static const AVProfile profiles[] = {

  5661.     { FF_PROFILE_VC1_SIMPLE,   "Simple"   },

  5662.     { FF_PROFILE_VC1_MAIN,     "Main"     },

  5663.     { FF_PROFILE_VC1_COMPLEX,  "Complex"  },

  5664.     { FF_PROFILE_VC1_ADVANCED, "Advanced" },

  5665.     { FF_PROFILE_UNKNOWN },

  5666. };

  5667. 

  5668. static const enum AVPixelFormat vc1_hwaccel_pixfmt_list_420[] = {

  5669. #if CONFIG_DXVA2

  5670.     AV_PIX_FMT_DXVA2_VLD,

  5671. #endif

  5672. #if CONFIG_VAAPI

  5673.     AV_PIX_FMT_VAAPI_VLD,

  5674. #endif

  5675. #if CONFIG_VDPAU

  5676.     AV_PIX_FMT_VDPAU,

  5677. #endif

  5678.     AV_PIX_FMT_YUV420P,

  5679.     AV_PIX_FMT_NONE

  5680. };

  5681. 

  5682. AVCodec ff_vc1_decoder = {

  5683.     .name           = "vc1",

  5684.     .type           = AVMEDIA_TYPE_VIDEO,

  5685.     .id             = AV_CODEC_ID_VC1,

  5686.     .priv_data_size = sizeof(VC1Context),

  5687.     .init           = vc1_decode_init,

  5688.     .close          = ff_vc1_decode_end,

  5689.     .decode         = vc1_decode_frame,

  5690.     .flush          = ff_mpeg_flush,

  5691.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  5692.     .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  5693.     .pix_fmts       = vc1_hwaccel_pixfmt_list_420,

  5694.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5695. };

  5696. 

  5697. #if CONFIG_WMV3_DECODER

  5698. AVCodec ff_wmv3_decoder = {

  5699.     .name           = "wmv3",

  5700.     .type           = AVMEDIA_TYPE_VIDEO,

  5701.     .id             = AV_CODEC_ID_WMV3,

  5702.     .priv_data_size = sizeof(VC1Context),

  5703.     .init           = vc1_decode_init,

  5704.     .close          = ff_vc1_decode_end,

  5705.     .decode         = vc1_decode_frame,

  5706.     .flush          = ff_mpeg_flush,

  5707.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  5708.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  5709.     .pix_fmts       = vc1_hwaccel_pixfmt_list_420,

  5710.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5711. };

  5712. #endif

  5713. 

  5714. #if CONFIG_WMV3_VDPAU_DECODER

  5715. AVCodec ff_wmv3_vdpau_decoder = {

  5716.     .name           = "wmv3_vdpau",

  5717.     .type           = AVMEDIA_TYPE_VIDEO,

  5718.     .id             = AV_CODEC_ID_WMV3,

  5719.     .priv_data_size = sizeof(VC1Context),

  5720.     .init           = vc1_decode_init,

  5721.     .close          = ff_vc1_decode_end,

  5722.     .decode         = vc1_decode_frame,

  5723.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  5724.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  5725.     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_WMV3, AV_PIX_FMT_NONE },

  5726.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5727. };

  5728. #endif

  5729. 

  5730. #if CONFIG_VC1_VDPAU_DECODER

  5731. AVCodec ff_vc1_vdpau_decoder = {

  5732.     .name           = "vc1_vdpau",

  5733.     .type           = AVMEDIA_TYPE_VIDEO,

  5734.     .id             = AV_CODEC_ID_VC1,

  5735.     .priv_data_size = sizeof(VC1Context),

  5736.     .init           = vc1_decode_init,

  5737.     .close          = ff_vc1_decode_end,

  5738.     .decode         = vc1_decode_frame,

  5739.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  5740.     .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  5741.     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_VC1, AV_PIX_FMT_NONE },

  5742.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5743. };

  5744. #endif

  5745. 

  5746. #if CONFIG_WMV3IMAGE_DECODER

  5747. AVCodec ff_wmv3image_decoder = {

  5748.     .name           = "wmv3image",

  5749.     .type           = AVMEDIA_TYPE_VIDEO,

  5750.     .id             = AV_CODEC_ID_WMV3IMAGE,

  5751.     .priv_data_size = sizeof(VC1Context),

  5752.     .init           = vc1_decode_init,

  5753.     .close          = ff_vc1_decode_end,

  5754.     .decode         = vc1_decode_frame,

  5755.     .capabilities   = CODEC_CAP_DR1,

  5756.     .flush          = vc1_sprite_flush,

  5757.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),

  5758.     .pix_fmts       = ff_pixfmt_list_420

  5759. };

  5760. #endif

  5761. 

  5762. #if CONFIG_VC1IMAGE_DECODER

  5763. AVCodec ff_vc1image_decoder = {

  5764.     .name           = "vc1image",

  5765.     .type           = AVMEDIA_TYPE_VIDEO,

  5766.     .id             = AV_CODEC_ID_VC1IMAGE,

  5767.     .priv_data_size = sizeof(VC1Context),

  5768.     .init           = vc1_decode_init,

  5769.     .close          = ff_vc1_decode_end,

  5770.     .decode         = vc1_decode_frame,

  5771.     .capabilities   = CODEC_CAP_DR1,

  5772.     .flush          = vc1_sprite_flush,

  5773.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),

  5774.     .pix_fmts       = ff_pixfmt_list_420

  5775. };

  5776. #endif