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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 "dsputil.h"

  31. #include "avcodec.h"

  32. #include "mpegvideo.h"

  33. #include "h263.h"

  34. #include "vc1.h"

  35. #include "vc1data.h"

  36. #include "vc1acdata.h"

  37. #include "msmpeg4data.h"

  38. #include "unary.h"

  39. #include "simple_idct.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. #define AC_VLC_BITS 9

  49. 

  50. 

  51. static const uint16_t vlc_offs[] = {

  52.         0,   520,   552,   616,  1128,  1160,  1224,  1740,  1772,  1836,  1900,  2436,

  53.      2986,  3050,  3610,  4154,  4218,  4746,  5326,  5390,  5902,  6554,  7658,  8342,

  54.      9304,  9988, 10630, 11234, 12174, 13006, 13560, 14232, 14786, 15432, 16350, 17522,

  55.     20372, 21818, 22330, 22394, 23166, 23678, 23742, 24820, 25332, 25396, 26460, 26980,

  56.     27048, 27592, 27600, 27608, 27616, 27624, 28224, 28258, 28290, 28802, 28834, 28866,

  57.     29378, 29412, 29444, 29960, 29994, 30026, 30538, 30572, 30604, 31120, 31154, 31186,

  58.     31714, 31746, 31778, 32306, 32340, 32372

  59. };

  60. 

  61. // offset tables for interlaced picture MVDATA decoding

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

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

  64. 

  65. /**

  66.  * Init VC-1 specific tables and VC1Context members

  67.  * @param v The VC1Context to initialize

  68.  * @return Status

  69.  */

  70. static int vc1_init_common(VC1Context *v)

  71. {

  72.     static int done = 0;

  73.     int i = 0;

  74.     static VLC_TYPE vlc_table[32372][2];

  75. 

  76.     v->hrd_rate = v->hrd_buffer = NULL;

  77. 

  78.     /* VLC tables */

  79.     if (!done) {

  80.         INIT_VLC_STATIC(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  81.                         ff_vc1_bfraction_bits, 1, 1,

  82.                         ff_vc1_bfraction_codes, 1, 1, 1 << VC1_BFRACTION_VLC_BITS);

  83.         INIT_VLC_STATIC(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  84.                         ff_vc1_norm2_bits, 1, 1,

  85.                         ff_vc1_norm2_codes, 1, 1, 1 << VC1_NORM2_VLC_BITS);

  86.         INIT_VLC_STATIC(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  87.                         ff_vc1_norm6_bits, 1, 1,

  88.                         ff_vc1_norm6_codes, 2, 2, 556);

  89.         INIT_VLC_STATIC(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  90.                         ff_vc1_imode_bits, 1, 1,

  91.                         ff_vc1_imode_codes, 1, 1, 1 << VC1_IMODE_VLC_BITS);

  92.         for (i = 0; i < 3; i++) {

  93.             ff_vc1_ttmb_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 0]];

  94.             ff_vc1_ttmb_vlc[i].table_allocated = vlc_offs[i * 3 + 1] - vlc_offs[i * 3 + 0];

  95.             init_vlc(&ff_vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,

  96.                      ff_vc1_ttmb_bits[i], 1, 1,

  97.                      ff_vc1_ttmb_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  98.             ff_vc1_ttblk_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 1]];

  99.             ff_vc1_ttblk_vlc[i].table_allocated = vlc_offs[i * 3 + 2] - vlc_offs[i * 3 + 1];

  100.             init_vlc(&ff_vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,

  101.                      ff_vc1_ttblk_bits[i], 1, 1,

  102.                      ff_vc1_ttblk_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  103.             ff_vc1_subblkpat_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 2]];

  104.             ff_vc1_subblkpat_vlc[i].table_allocated = vlc_offs[i * 3 + 3] - vlc_offs[i * 3 + 2];

  105.             init_vlc(&ff_vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,

  106.                      ff_vc1_subblkpat_bits[i], 1, 1,

  107.                      ff_vc1_subblkpat_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  108.         }

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

  110.             ff_vc1_4mv_block_pattern_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 9]];

  111.             ff_vc1_4mv_block_pattern_vlc[i].table_allocated = vlc_offs[i * 3 + 10] - vlc_offs[i * 3 + 9];

  112.             init_vlc(&ff_vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,

  113.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

  114.                      ff_vc1_4mv_block_pattern_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  115.             ff_vc1_cbpcy_p_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 10]];

  116.             ff_vc1_cbpcy_p_vlc[i].table_allocated = vlc_offs[i * 3 + 11] - vlc_offs[i * 3 + 10];

  117.             init_vlc(&ff_vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,

  118.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

  119.                      ff_vc1_cbpcy_p_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  120.             ff_vc1_mv_diff_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 11]];

  121.             ff_vc1_mv_diff_vlc[i].table_allocated = vlc_offs[i * 3 + 12] - vlc_offs[i * 3 + 11];

  122.             init_vlc(&ff_vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,

  123.                      ff_vc1_mv_diff_bits[i], 1, 1,

  124.                      ff_vc1_mv_diff_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  125.         }

  126.         for (i = 0; i < 8; i++) {

  127.             ff_vc1_ac_coeff_table[i].table           = &vlc_table[vlc_offs[i * 2 + 21]];

  128.             ff_vc1_ac_coeff_table[i].table_allocated = vlc_offs[i * 2 + 22] - vlc_offs[i * 2 + 21];

  129.             init_vlc(&ff_vc1_ac_coeff_table[i], AC_VLC_BITS, vc1_ac_sizes[i],

  130.                      &vc1_ac_tables[i][0][1], 8, 4,

  131.                      &vc1_ac_tables[i][0][0], 8, 4, INIT_VLC_USE_NEW_STATIC);

  132.             /* initialize interlaced MVDATA tables (2-Ref) */

  133.             ff_vc1_2ref_mvdata_vlc[i].table           = &vlc_table[vlc_offs[i * 2 + 22]];

  134.             ff_vc1_2ref_mvdata_vlc[i].table_allocated = vlc_offs[i * 2 + 23] - vlc_offs[i * 2 + 22];

  135.             init_vlc(&ff_vc1_2ref_mvdata_vlc[i], VC1_2REF_MVDATA_VLC_BITS, 126,

  136.                      ff_vc1_2ref_mvdata_bits[i], 1, 1,

  137.                      ff_vc1_2ref_mvdata_codes[i], 4, 4, INIT_VLC_USE_NEW_STATIC);

  138.         }

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

  140.             /* initialize 4MV MBMODE VLC tables for interlaced frame P picture */

  141.             ff_vc1_intfr_4mv_mbmode_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 37]];

  142.             ff_vc1_intfr_4mv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 38] - vlc_offs[i * 3 + 37];

  143.             init_vlc(&ff_vc1_intfr_4mv_mbmode_vlc[i], VC1_INTFR_4MV_MBMODE_VLC_BITS, 15,

  144.                      ff_vc1_intfr_4mv_mbmode_bits[i], 1, 1,

  145.                      ff_vc1_intfr_4mv_mbmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  146.             /* initialize NON-4MV MBMODE VLC tables for the same */

  147.             ff_vc1_intfr_non4mv_mbmode_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 38]];

  148.             ff_vc1_intfr_non4mv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 39] - vlc_offs[i * 3 + 38];

  149.             init_vlc(&ff_vc1_intfr_non4mv_mbmode_vlc[i], VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 9,

  150.                      ff_vc1_intfr_non4mv_mbmode_bits[i], 1, 1,

  151.                      ff_vc1_intfr_non4mv_mbmode_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  152.             /* initialize interlaced MVDATA tables (1-Ref) */

  153.             ff_vc1_1ref_mvdata_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 39]];

  154.             ff_vc1_1ref_mvdata_vlc[i].table_allocated = vlc_offs[i * 3 + 40] - vlc_offs[i * 3 + 39];

  155.             init_vlc(&ff_vc1_1ref_mvdata_vlc[i], VC1_1REF_MVDATA_VLC_BITS, 72,

  156.                      ff_vc1_1ref_mvdata_bits[i], 1, 1,

  157.                      ff_vc1_1ref_mvdata_codes[i], 4, 4, INIT_VLC_USE_NEW_STATIC);

  158.         }

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

  160.             /* Initialize 2MV Block pattern VLC tables */

  161.             ff_vc1_2mv_block_pattern_vlc[i].table           = &vlc_table[vlc_offs[i + 49]];

  162.             ff_vc1_2mv_block_pattern_vlc[i].table_allocated = vlc_offs[i + 50] - vlc_offs[i + 49];

  163.             init_vlc(&ff_vc1_2mv_block_pattern_vlc[i], VC1_2MV_BLOCK_PATTERN_VLC_BITS, 4,

  164.                      ff_vc1_2mv_block_pattern_bits[i], 1, 1,

  165.                      ff_vc1_2mv_block_pattern_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  166.         }

  167.         for (i = 0; i < 8; i++) {

  168.             /* Initialize interlaced CBPCY VLC tables (Table 124 - Table 131) */

  169.             ff_vc1_icbpcy_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 53]];

  170.             ff_vc1_icbpcy_vlc[i].table_allocated = vlc_offs[i * 3 + 54] - vlc_offs[i * 3 + 53];

  171.             init_vlc(&ff_vc1_icbpcy_vlc[i], VC1_ICBPCY_VLC_BITS, 63,

  172.                      ff_vc1_icbpcy_p_bits[i], 1, 1,

  173.                      ff_vc1_icbpcy_p_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  174.             /* Initialize interlaced field picture MBMODE VLC tables */

  175.             ff_vc1_if_mmv_mbmode_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 54]];

  176.             ff_vc1_if_mmv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 55] - vlc_offs[i * 3 + 54];

  177.             init_vlc(&ff_vc1_if_mmv_mbmode_vlc[i], VC1_IF_MMV_MBMODE_VLC_BITS, 8,

  178.                      ff_vc1_if_mmv_mbmode_bits[i], 1, 1,

  179.                      ff_vc1_if_mmv_mbmode_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  180.             ff_vc1_if_1mv_mbmode_vlc[i].table           = &vlc_table[vlc_offs[i * 3 + 55]];

  181.             ff_vc1_if_1mv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 56] - vlc_offs[i * 3 + 55];

  182.             init_vlc(&ff_vc1_if_1mv_mbmode_vlc[i], VC1_IF_1MV_MBMODE_VLC_BITS, 6,

  183.                      ff_vc1_if_1mv_mbmode_bits[i], 1, 1,

  184.                      ff_vc1_if_1mv_mbmode_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  185.         }

  186.         done = 1;

  187.     }

  188. 

  189.     /* Other defaults */

  190.     v->pq      = -1;

  191.     v->mvrange = 0; /* 7.1.1.18, p80 */

  192. 

  193.     return 0;

  194. }

  195. 

  196. /***********************************************************************/

  197. /**

  198.  * @name VC-1 Bitplane decoding

  199.  * @see 8.7, p56

  200.  * @{

  201.  */

  202. 

  203. /**

  204.  * Imode types

  205.  * @{

  206.  */

  207. enum Imode {

  208.     IMODE_RAW,

  209.     IMODE_NORM2,

  210.     IMODE_DIFF2,

  211.     IMODE_NORM6,

  212.     IMODE_DIFF6,

  213.     IMODE_ROWSKIP,

  214.     IMODE_COLSKIP

  215. };

  216. /** @} */ //imode defines

  217. 

  218. 

  219. /** @} */ //Bitplane group

  220. 

  221. static void vc1_put_signed_blocks_clamped(VC1Context *v)

  222. {

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

  224.     int topleft_mb_pos, top_mb_pos;

  225.     int stride_y, fieldtx;

  226.     int v_dist;

  227. 

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

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

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

  231.      * present as well.

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

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

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

  235.     if (!s->first_slice_line) {

  236.         if (s->mb_x) {

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

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

  239.             stride_y       = (s->linesize) << fieldtx;

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

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

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

  243.                                              stride_y);

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

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

  246.                                              stride_y);

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

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

  249.                                              stride_y);

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

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

  252.                                              stride_y);

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

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

  255.                                              s->uvlinesize);

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

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

  258.                                              s->uvlinesize);

  259.         }

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

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

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

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

  264.             v_dist     = fieldtx ? 15 : 8;

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

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

  267.                                              stride_y);

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

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

  270.                                              stride_y);

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

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

  273.                                              stride_y);

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

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

  276.                                              stride_y);

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

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

  279.                                              s->uvlinesize);

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

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

  282.                                              s->uvlinesize);

  283.         }

  284.     }

  285. 

  286. #define inc_blk_idx(idx) do { \

  287.         idx++; \

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

  289.             idx = 0; \

  290.     } while (0)

  291. 

  292.     inc_blk_idx(v->topleft_blk_idx);

  293.     inc_blk_idx(v->top_blk_idx);

  294.     inc_blk_idx(v->left_blk_idx);

  295.     inc_blk_idx(v->cur_blk_idx);

  296. }

  297. 

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

  299. {

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

  301.     int j;

  302.     if (!s->first_slice_line) {

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

  304.         if (s->mb_x)

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

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

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

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

  309.             if (s->mb_x)

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

  311.         }

  312.     }

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

  314. 

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

  316.         if (s->mb_x) {

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

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

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

  320.         }

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

  322.     }

  323. }

  324. 

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

  326. {

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

  328.     int j;

  329. 

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

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

  332.     if (!s->first_slice_line) {

  333.         if (s->mb_x) {

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

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

  336. 

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

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

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

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

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

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

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

  344.                     }

  345.                 }

  346.             }

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

  348.         }

  349. 

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

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

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

  353. 

  354.                 if (s->mb_x)

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

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

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

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

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

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

  361.                     }

  362.                 }

  363.             }

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

  365.         }

  366. 

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

  368.             if (s->mb_x) {

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

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

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

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

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

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

  375.                     }

  376.                 }

  377.             }

  378. 

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

  380.                 if (s->mb_x)

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

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

  383.                 if (s->mb_x) {

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

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

  386.                     }

  387.                 }

  388.             }

  389.         }

  390.     }

  391. }

  392. 

  393. static void vc1_smooth_overlap_filter_iblk(VC1Context *v)

  394. {

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

  396.     int mb_pos;

  397. 

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

  399.         return;

  400. 

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

  402. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  422.             }

  423.         }

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

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

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

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

  428. 

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

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

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

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

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

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

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

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

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

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

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

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

  441.                 }

  442.             }

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

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

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

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

  447.         }

  448.     }

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

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

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

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

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

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

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

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

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

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

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

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

  461.             }

  462.         }

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

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

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

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

  467.     }

  468. }

  469. 

  470. /** Do motion compensation over 1 macroblock

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

  472.  */

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

  474. {

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

  476.     DSPContext *dsp   = &v->s.dsp;

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

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

  479.     int off, off_uv;

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

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

  482.         return;

  483. 

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

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

  486. 

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

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

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

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

  491.     }

  492. 

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

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

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

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

  497. 

  498.     if (v->field_mode &&

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

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

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

  502.     }

  503. 

  504.     if (v->fastuvmc && (v->fcm != 1)) { // fastuvmc shall be ignored for interlaced frame picture

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

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

  507.     }

  508.     if (v->field_mode) { // interlaced field picture

  509.         if (!dir) {

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

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

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

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

  514.             } else {

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

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

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

  518.             }

  519.         } else {

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

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

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

  523.         }

  524.     } else {

  525.         if (!dir) {

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

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

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

  529.         } else {

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

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

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

  533.         }

  534.     }

  535. 

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

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

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

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

  540. 

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

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

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

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

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

  546.     } else {

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

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

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

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

  551.     }

  552. 

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

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

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

  556. 

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

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

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

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

  561.     }

  562. 

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

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

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

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

  567.     }

  568. 

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

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

  571.         || (unsigned)(src_y - s->mspel) > v_edge_pos    - (my&3) - 16 - s->mspel * 3) {

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

  573. 

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

  575.         s->dsp.emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize,

  576.                                 17 + s->mspel * 2, 17 + s->mspel * 2,

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

  578.                                 s->h_edge_pos, v_edge_pos);

  579.         srcY = s->edge_emu_buffer;

  580.         s->dsp.emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8 + 1, 8 + 1,

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

  582.         s->dsp.emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8 + 1, 8 + 1,

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

  584.         srcU = uvbuf;

  585.         srcV = uvbuf + 16;

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

  587.         if (v->rangeredfrm) {

  588.             int i, j;

  589.             uint8_t *src, *src2;

  590. 

  591.             src = srcY;

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

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

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

  595.                 src += s->linesize;

  596.             }

  597.             src  = srcU;

  598.             src2 = srcV;

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

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

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

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

  603.                 }

  604.                 src  += s->uvlinesize;

  605.                 src2 += s->uvlinesize;

  606.             }

  607.         }

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

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

  610.             int i, j;

  611.             uint8_t *src, *src2;

  612. 

  613.             src = srcY;

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

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

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

  617.                 src += s->linesize;

  618.             }

  619.             src  = srcU;

  620.             src2 = srcV;

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

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

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

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

  625.                 }

  626.                 src  += s->uvlinesize;

  627.                 src2 += s->uvlinesize;

  628.             }

  629.         }

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

  631.     }

  632. 

  633.     if (v->field_mode && v->cur_field_type) {

  634.         off    = s->current_picture_ptr->f.linesize[0];

  635.         off_uv = s->current_picture_ptr->f.linesize[1];

  636.     } else {

  637.         off    = 0;

  638.         off_uv = 0;

  639.     }

  640.     if (s->mspel) {

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

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

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

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

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

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

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

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

  649.         if (!v->rnd)

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

  651.         else

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

  653.     }

  654. 

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

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

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

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

  659.     if (!v->rnd) {

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

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

  662.     } else {

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

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

  665.     }

  666. }

  667. 

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

  669. {

  670.     if (a < b) {

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

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

  673.     } else {

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

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

  676.     }

  677. }

  678. 

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

  680.  */

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

  682. {

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

  684.     DSPContext *dsp = &v->s.dsp;

  685.     uint8_t *srcY;

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

  687.     int off;

  688.     int fieldmv = (v->fcm == 1) ? v->blk_mv_type[s->block_index[n]] : 0;

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

  690. 

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

  692.         return;

  693. 

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

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

  696. 

  697.     if (!dir) {

  698.         if (v->field_mode) {

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

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

  701.             else

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

  703.         } else

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

  705.     } else

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

  707. 

  708.     if (v->field_mode) {

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

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

  711.     }

  712. 

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

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

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

  716.         int tx, ty;

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

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

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

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

  721.             opp_count  += f;

  722.             same_count += 1 - f;

  723.         }

  724.         f = opp_count > same_count;

  725.         switch (f ? opp_count : same_count) {

  726.         case 4:

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

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

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

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

  731.             break;

  732.         case 3:

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

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

  735.             break;

  736.         case 2:

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

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

  739.             break;

  740.         }

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

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

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

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

  745.     }

  746. 

  747.     if (v->fcm == 1) {  // not sure if needed for other types of picture

  748.         int qx, qy;

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

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

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

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

  753. 

  754.         if (qx < -17)

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

  756.         else if (qx > width)

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

  758.         if (qy < -18)

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

  760.         else if (qy > height + 1)

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

  762.     }

  763. 

  764.     if ((v->fcm == 1) && fieldmv)

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

  766.     else

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

  768.     if (v->field_mode && v->cur_field_type)

  769.         off += s->current_picture_ptr->f.linesize[0];

  770. 

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

  772.     if (!fieldmv)

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

  774.     else

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

  776. 

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

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

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

  780.     } else {

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

  782.         if (v->fcm == 1) {

  783.             if (src_y & 1)

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

  785.             else

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

  787.         } else {

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

  789.         }

  790.     }

  791. 

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

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

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

  795. 

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

  797.         v_edge_pos--;

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

  799.         src_y--;

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

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

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

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

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

  805.         s->dsp.emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize,

  806.                                 9 + s->mspel * 2, (9 + s->mspel * 2) << fieldmv,

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

  808.                                 s->h_edge_pos, v_edge_pos);

  809.         srcY = s->edge_emu_buffer;

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

  811.         if (v->rangeredfrm) {

  812.             int i, j;

  813.             uint8_t *src;

  814. 

  815.             src = srcY;

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

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

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

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

  820.             }

  821.         }

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

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

  824.             int i, j;

  825.             uint8_t *src;

  826. 

  827.             src = srcY;

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

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

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

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

  832.             }

  833.         }

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

  835.     }

  836. 

  837.     if (s->mspel) {

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

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

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

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

  842.         if (!v->rnd)

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

  844.         else

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

  846.     }

  847. }

  848. 

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

  850. {

  851.     int idx, i;

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

  853. 

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

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

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

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

  858.     if (!idx) {

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

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

  861.         return 4;

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

  863.         switch (idx) {

  864.         case 0x1:

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

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

  867.             return 3;

  868.         case 0x2:

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

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

  871.             return 3;

  872.         case 0x4:

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

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

  875.             return 3;

  876.         case 0x8:

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

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

  879.             return 3;

  880.         }

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

  882.         int t1 = 0, t2 = 0;

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

  884.             if (!a[i]) {

  885.                 t1 = i;

  886.                 break;

  887.             }

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

  889.             if (!a[i]) {

  890.                 t2 = i;

  891.                 break;

  892.             }

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

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

  895.         return 2;

  896.     } else {

  897.         return 0;

  898.     }

  899.     return -1;

  900. }

  901. 

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

  903.  */

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

  905. {

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

  907.     DSPContext *dsp   = &v->s.dsp;

  908.     uint8_t *srcU, *srcV;

  909.     int uvmx, uvmy, uvsrc_x, uvsrc_y;

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

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

  912.     int valid_count;

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

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

  915. 

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

  917.         return;

  918.     if (s->flags & CODEC_FLAG_GRAY)

  919.         return;

  920. 

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

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

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

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

  925.         if (v->field_mode)

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

  927.     }

  928. 

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

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

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

  932.         if (!valid_count) {

  933.             s->current_picture.f.motion_val[1][s->block_index[0]][0] = 0;

  934.             s->current_picture.f.motion_val[1][s->block_index[0]][1] = 0;

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

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

  937.         }

  938.     } else {

  939.         int dominant = 0;

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

  941.             dominant = 1;

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

  943.         if (dominant)

  944.             chroma_ref_type = !v->cur_field_type;

  945.     }

  946.     s->current_picture.f.motion_val[1][s->block_index[0]][0] = tx;

  947.     s->current_picture.f.motion_val[1][s->block_index[0]][1] = ty;

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

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

  950. 

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

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

  953. 

  954.     if (v->fastuvmc) {

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

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

  957.     }

  958.     // Field conversion bias

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

  960.         uvmy += 2 - 4 * chroma_ref_type;

  961. 

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

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

  964. 

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

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

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

  968.     } else {

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

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

  971.     }

  972. 

  973.     if (!dir) {

  974.         if (v->field_mode) {

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

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

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

  978.             } else {

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

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

  981.             }

  982.         } else {

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

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

  985.         }

  986.     } else {

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

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

  989.     }

  990. 

  991.     if (v->field_mode) {

  992.         if (chroma_ref_type) {

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

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

  995.         }

  996.         off = v->cur_field_type ? s->current_picture_ptr->f.linesize[1] : 0;

  997.     }

  998. 

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

  1000.         || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9

  1001.         || (unsigned)uvsrc_y > (v_edge_pos    >> 1) - 9) {

  1002.         s->dsp.emulated_edge_mc(s->edge_emu_buffer     , srcU, s->uvlinesize,

  1003.                                 8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

  1004.                                 s->h_edge_pos >> 1, v_edge_pos >> 1);

  1005.         s->dsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize,

  1006.                                 8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

  1007.                                 s->h_edge_pos >> 1, v_edge_pos >> 1);

  1008.         srcU = s->edge_emu_buffer;

  1009.         srcV = s->edge_emu_buffer + 16;

  1010. 

  1011.         /* if we deal with range reduction we need to scale source blocks */

  1012.         if (v->rangeredfrm) {

  1013.             int i, j;

  1014.             uint8_t *src, *src2;

  1015. 

  1016.             src  = srcU;

  1017.             src2 = srcV;

  1018.             for (j = 0; j < 9; j++) {

  1019.                 for (i = 0; i < 9; i++) {

  1020.                     src[i]  = ((src[i]  - 128) >> 1) + 128;

  1021.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1022.                 }

  1023.                 src  += s->uvlinesize;

  1024.                 src2 += s->uvlinesize;

  1025.             }

  1026.         }

  1027.         /* if we deal with intensity compensation we need to scale source blocks */

  1028.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1029.             int i, j;

  1030.             uint8_t *src, *src2;

  1031. 

  1032.             src  = srcU;

  1033.             src2 = srcV;

  1034.             for (j = 0; j < 9; j++) {

  1035.                 for (i = 0; i < 9; i++) {

  1036.                     src[i]  = v->lutuv[src[i]];

  1037.                     src2[i] = v->lutuv[src2[i]];

  1038.                 }

  1039.                 src  += s->uvlinesize;

  1040.                 src2 += s->uvlinesize;

  1041.             }

  1042.         }

  1043.     }

  1044. 

  1045.     /* Chroma MC always uses qpel bilinear */

  1046.     uvmx = (uvmx & 3) << 1;

  1047.     uvmy = (uvmy & 3) << 1;

  1048.     if (!v->rnd) {

  1049.         dsp->put_h264_chroma_pixels_tab[0](s->dest[1] + off, srcU, s->uvlinesize, 8, uvmx, uvmy);

  1050.         dsp->put_h264_chroma_pixels_tab[0](s->dest[2] + off, srcV, s->uvlinesize, 8, uvmx, uvmy);

  1051.     } else {

  1052.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1] + off, srcU, s->uvlinesize, 8, uvmx, uvmy);

  1053.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2] + off, srcV, s->uvlinesize, 8, uvmx, uvmy);

  1054.     }

  1055. }

  1056. 

  1057. /** Do motion compensation for 4-MV field chroma macroblock (both U and V)

  1058.  */

  1059. static void vc1_mc_4mv_chroma4(VC1Context *v)

  1060. {

  1061.     MpegEncContext *s = &v->s;

  1062.     DSPContext *dsp = &v->s.dsp;

  1063.     uint8_t *srcU, *srcV;

  1064.     int uvsrc_x, uvsrc_y;

  1065.     int uvmx_field[4], uvmy_field[4];

  1066.     int i, off, tx, ty;

  1067.     int fieldmv = v->blk_mv_type[s->block_index[0]];

  1068.     static const int s_rndtblfield[16] = { 0, 0, 1, 2, 4, 4, 5, 6, 2, 2, 3, 8, 6, 6, 7, 12 };

  1069.     int v_dist = fieldmv ? 1 : 4; // vertical offset for lower sub-blocks

  1070.     int v_edge_pos = s->v_edge_pos >> 1;

  1071. 

  1072.     if (!v->s.last_picture.f.data[0])

  1073.         return;

  1074.     if (s->flags & CODEC_FLAG_GRAY)

  1075.         return;

  1076. 

  1077.     for (i = 0; i < 4; i++) {

  1078.         tx = s->mv[0][i][0];

  1079.         uvmx_field[i] = (tx + ((tx & 3) == 3)) >> 1;

  1080.         ty = s->mv[0][i][1];

  1081.         if (fieldmv)

  1082.             uvmy_field[i] = (ty >> 4) * 8 + s_rndtblfield[ty & 0xF];

  1083.         else

  1084.             uvmy_field[i] = (ty + ((ty & 3) == 3)) >> 1;

  1085.     }

  1086. 

  1087.     for (i = 0; i < 4; i++) {

  1088.         off = (i & 1) * 4 + ((i & 2) ? v_dist * s->uvlinesize : 0);

  1089.         uvsrc_x = s->mb_x * 8 +  (i & 1) * 4           + (uvmx_field[i] >> 2);

  1090.         uvsrc_y = s->mb_y * 8 + ((i & 2) ? v_dist : 0) + (uvmy_field[i] >> 2);

  1091.         // FIXME: implement proper pull-back (see vc1cropmv.c, vc1CROPMV_ChromaPullBack())

  1092.         uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);

  1093.         uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);

  1094.         srcU = s->last_picture.f.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;

  1095.         srcV = s->last_picture.f.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;

  1096.         uvmx_field[i] = (uvmx_field[i] & 3) << 1;

  1097.         uvmy_field[i] = (uvmy_field[i] & 3) << 1;

  1098. 

  1099.         if (fieldmv && !(uvsrc_y & 1))

  1100.             v_edge_pos--;

  1101.         if (fieldmv && (uvsrc_y & 1) && uvsrc_y < 2)

  1102.             uvsrc_y--;

  1103.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1104.             || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 5

  1105.             || (unsigned)uvsrc_y > v_edge_pos - (5 << fieldmv)) {

  1106.             s->dsp.emulated_edge_mc(s->edge_emu_buffer, srcU, s->uvlinesize,

  1107.                                     5, (5 << fieldmv), uvsrc_x, uvsrc_y,

  1108.                                     s->h_edge_pos >> 1, v_edge_pos);

  1109.             s->dsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize,

  1110.                                     5, (5 << fieldmv), uvsrc_x, uvsrc_y,

  1111.                                     s->h_edge_pos >> 1, v_edge_pos);

  1112.             srcU = s->edge_emu_buffer;

  1113.             srcV = s->edge_emu_buffer + 16;

  1114. 

  1115.             /* if we deal with intensity compensation we need to scale source blocks */

  1116.             if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1117.                 int i, j;

  1118.                 uint8_t *src, *src2;

  1119. 

  1120.                 src  = srcU;

  1121.                 src2 = srcV;

  1122.                 for (j = 0; j < 5; j++) {

  1123.                     for (i = 0; i < 5; i++) {

  1124.                         src[i]  = v->lutuv[src[i]];

  1125.                         src2[i] = v->lutuv[src2[i]];

  1126.                     }

  1127.                     src  += s->uvlinesize << 1;

  1128.                     src2 += s->uvlinesize << 1;

  1129.                 }

  1130.             }

  1131.         }

  1132.         if (!v->rnd) {

  1133.             dsp->put_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1134.             dsp->put_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  1135.         } else {

  1136.             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]);

  1137.             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]);

  1138.         }

  1139.     }

  1140. }

  1141. 

  1142. /***********************************************************************/

  1143. /**

  1144.  * @name VC-1 Block-level functions

  1145.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1146.  * @{

  1147.  */

  1148. 

  1149. /**

  1150.  * @def GET_MQUANT

  1151.  * @brief Get macroblock-level quantizer scale

  1152.  */

  1153. #define GET_MQUANT()                                           \

  1154.     if (v->dquantfrm) {                                        \

  1155.         int edges = 0;                                         \

  1156.         if (v->dqprofile == DQPROFILE_ALL_MBS) {               \

  1157.             if (v->dqbilevel) {                                \

  1158.                 mquant = (get_bits1(gb)) ? v->altpq : v->pq;   \

  1159.             } else {                                           \

  1160.                 mqdiff = get_bits(gb, 3);                      \

  1161.                 if (mqdiff != 7)                               \

  1162.                     mquant = v->pq + mqdiff;                   \

  1163.                 else                                           \

  1164.                     mquant = get_bits(gb, 5);                  \

  1165.             }                                                  \

  1166.         }                                                      \

  1167.         if (v->dqprofile == DQPROFILE_SINGLE_EDGE)             \

  1168.             edges = 1 << v->dqsbedge;                          \

  1169.         else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES)       \

  1170.             edges = (3 << v->dqsbedge) % 15;                   \

  1171.         else if (v->dqprofile == DQPROFILE_FOUR_EDGES)         \

  1172.             edges = 15;                                        \

  1173.         if ((edges&1) && !s->mb_x)                             \

  1174.             mquant = v->altpq;                                 \

  1175.         if ((edges&2) && s->first_slice_line)                  \

  1176.             mquant = v->altpq;                                 \

  1177.         if ((edges&4) && s->mb_x == (s->mb_width - 1))         \

  1178.             mquant = v->altpq;                                 \

  1179.         if ((edges&8) && s->mb_y == (s->mb_height - 1))        \

  1180.             mquant = v->altpq;                                 \

  1181.     }

  1182. 

  1183. /**

  1184.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1185.  * @brief Get MV differentials

  1186.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1187.  * @param _dmv_x Horizontal differential for decoded MV

  1188.  * @param _dmv_y Vertical differential for decoded MV

  1189.  */

  1190. #define GET_MVDATA(_dmv_x, _dmv_y)                                      \

  1191.     index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \

  1192.                          VC1_MV_DIFF_VLC_BITS, 2);                      \

  1193.     if (index > 36) {                                                   \

  1194.         mb_has_coeffs = 1;                                              \

  1195.         index -= 37;                                                    \

  1196.     } else                                                              \

  1197.         mb_has_coeffs = 0;                                              \

  1198.     s->mb_intra = 0;                                                    \

  1199.     if (!index) {                                                       \

  1200.         _dmv_x = _dmv_y = 0;                                            \

  1201.     } else if (index == 35) {                                           \

  1202.         _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1203.         _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1204.     } else if (index == 36) {                                           \

  1205.         _dmv_x = 0;                                                     \

  1206.         _dmv_y = 0;                                                     \

  1207.         s->mb_intra = 1;                                                \

  1208.     } else {                                                            \

  1209.         index1 = index % 6;                                             \

  1210.         if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1211.         else                                   val = 0;                 \

  1212.         if (size_table[index1] - val > 0)                               \

  1213.             val = get_bits(gb, size_table[index1] - val);               \

  1214.         else                                   val = 0;                 \

  1215.         sign = 0 - (val&1);                                             \

  1216.         _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1217.                                                                         \

  1218.         index1 = index / 6;                                             \

  1219.         if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1220.         else                                   val = 0;                 \

  1221.         if (size_table[index1] - val > 0)                               \

  1222.             val = get_bits(gb, size_table[index1] - val);               \

  1223.         else                                   val = 0;                 \

  1224.         sign = 0 - (val & 1);                                           \

  1225.         _dmv_y = (sign ^ ((val >> 1) + offset_table[index1])) - sign;   \

  1226.     }

  1227. 

  1228. static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,

  1229.                                                    int *dmv_y, int *pred_flag)

  1230. {

  1231.     int index, index1;

  1232.     int extend_x = 0, extend_y = 0;

  1233.     GetBitContext *gb = &v->s.gb;

  1234.     int bits, esc;

  1235.     int val, sign;

  1236.     const int* offs_tab;

  1237. 

  1238.     if (v->numref) {

  1239.         bits = VC1_2REF_MVDATA_VLC_BITS;

  1240.         esc  = 125;

  1241.     } else {

  1242.         bits = VC1_1REF_MVDATA_VLC_BITS;

  1243.         esc  = 71;

  1244.     }

  1245.     switch (v->dmvrange) {

  1246.     case 1:

  1247.         extend_x = 1;

  1248.         break;

  1249.     case 2:

  1250.         extend_y = 1;

  1251.         break;

  1252.     case 3:

  1253.         extend_x = extend_y = 1;

  1254.         break;

  1255.     }

  1256.     index = get_vlc2(gb, v->imv_vlc->table, bits, 3);

  1257.     if (index == esc) {

  1258.         *dmv_x = get_bits(gb, v->k_x);

  1259.         *dmv_y = get_bits(gb, v->k_y);

  1260.         if (v->numref) {

  1261.             *pred_flag = *dmv_y & 1;

  1262.             *dmv_y     = (*dmv_y + *pred_flag) >> 1;

  1263.         }

  1264.     }

  1265.     else {

  1266.         if (extend_x)

  1267.             offs_tab = offset_table2;

  1268.         else

  1269.             offs_tab = offset_table1;

  1270.         index1 = (index + 1) % 9;

  1271.         if (index1 != 0) {

  1272.             val    = get_bits(gb, index1 + extend_x);

  1273.             sign   = 0 -(val & 1);

  1274.             *dmv_x = (sign ^ ((val >> 1) + offs_tab[index1])) - sign;

  1275.         } else

  1276.             *dmv_x = 0;

  1277.         if (extend_y)

  1278.             offs_tab = offset_table2;

  1279.         else

  1280.             offs_tab = offset_table1;

  1281.         index1 = (index + 1) / 9;

  1282.         if (index1 > v->numref) {

  1283.             val    = get_bits(gb, (index1 + (extend_y << v->numref)) >> v->numref);

  1284.             sign   = 0 - (val & 1);

  1285.             *dmv_y = (sign ^ ((val >> 1) + offs_tab[index1 >> v->numref])) - sign;

  1286.         } else

  1287.             *dmv_y = 0;

  1288.         if (v->numref)

  1289.             *pred_flag = index1 & 1;

  1290.     }

  1291. }

  1292. 

  1293. static av_always_inline int scaleforsame_x(VC1Context *v, int n /* MV */, int dir)

  1294. {

  1295.     int scaledvalue, refdist;

  1296.     int scalesame1, scalesame2;

  1297.     int scalezone1_x, zone1offset_x;

  1298.     int table_index = dir ^ v->second_field;

  1299. 

  1300.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1301.         refdist = v->refdist;

  1302.     else

  1303.         refdist = dir ? v->brfd : v->frfd;

  1304.     if (refdist > 3)

  1305.         refdist = 3;

  1306.     scalesame1    = vc1_field_mvpred_scales[table_index][1][refdist];

  1307.     scalesame2    = vc1_field_mvpred_scales[table_index][2][refdist];

  1308.     scalezone1_x  = vc1_field_mvpred_scales[table_index][3][refdist];

  1309.     zone1offset_x = vc1_field_mvpred_scales[table_index][5][refdist];

  1310. 

  1311.     if (FFABS(n) > 255)

  1312.         scaledvalue = n;

  1313.     else {

  1314.         if (FFABS(n) < scalezone1_x)

  1315.             scaledvalue = (n * scalesame1) >> 8;

  1316.         else {

  1317.             if (n < 0)

  1318.                 scaledvalue = ((n * scalesame2) >> 8) - zone1offset_x;

  1319.             else

  1320.                 scaledvalue = ((n * scalesame2) >> 8) + zone1offset_x;

  1321.         }

  1322.     }

  1323.     return av_clip(scaledvalue, -v->range_x, v->range_x - 1);

  1324. }

  1325. 

  1326. static av_always_inline int scaleforsame_y(VC1Context *v, int i, int n /* MV */, int dir)

  1327. {

  1328.     int scaledvalue, refdist;

  1329.     int scalesame1, scalesame2;

  1330.     int scalezone1_y, zone1offset_y;

  1331.     int table_index = dir ^ v->second_field;

  1332. 

  1333.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1334.         refdist = v->refdist;

  1335.     else

  1336.         refdist = dir ? v->brfd : v->frfd;

  1337.     if (refdist > 3)

  1338.         refdist = 3;

  1339.     scalesame1    = vc1_field_mvpred_scales[table_index][1][refdist];

  1340.     scalesame2    = vc1_field_mvpred_scales[table_index][2][refdist];

  1341.     scalezone1_y  = vc1_field_mvpred_scales[table_index][4][refdist];

  1342.     zone1offset_y = vc1_field_mvpred_scales[table_index][6][refdist];

  1343. 

  1344.     if (FFABS(n) > 63)

  1345.         scaledvalue = n;

  1346.     else {

  1347.         if (FFABS(n) < scalezone1_y)

  1348.             scaledvalue = (n * scalesame1) >> 8;

  1349.         else {

  1350.             if (n < 0)

  1351.                 scaledvalue = ((n * scalesame2) >> 8) - zone1offset_y;

  1352.             else

  1353.                 scaledvalue = ((n * scalesame2) >> 8) + zone1offset_y;

  1354.         }

  1355.     }

  1356. 

  1357.     if (v->cur_field_type && !v->ref_field_type[dir])

  1358.         return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);

  1359.     else

  1360.         return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);

  1361. }

  1362. 

  1363. static av_always_inline int scaleforopp_x(VC1Context *v, int n /* MV */)

  1364. {

  1365.     int scalezone1_x, zone1offset_x;

  1366.     int scaleopp1, scaleopp2, brfd;

  1367.     int scaledvalue;

  1368. 

  1369.     brfd = FFMIN(v->brfd, 3);

  1370.     scalezone1_x  = vc1_b_field_mvpred_scales[3][brfd];

  1371.     zone1offset_x = vc1_b_field_mvpred_scales[5][brfd];

  1372.     scaleopp1     = vc1_b_field_mvpred_scales[1][brfd];

  1373.     scaleopp2     = vc1_b_field_mvpred_scales[2][brfd];

  1374. 

  1375.     if (FFABS(n) > 255)

  1376.         scaledvalue = n;

  1377.     else {

  1378.         if (FFABS(n) < scalezone1_x)

  1379.             scaledvalue = (n * scaleopp1) >> 8;

  1380.         else {

  1381.             if (n < 0)

  1382.                 scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_x;

  1383.             else

  1384.                 scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_x;

  1385.         }

  1386.     }

  1387.     return av_clip(scaledvalue, -v->range_x, v->range_x - 1);

  1388. }

  1389. 

  1390. static av_always_inline int scaleforopp_y(VC1Context *v, int n /* MV */, int dir)

  1391. {

  1392.     int scalezone1_y, zone1offset_y;

  1393.     int scaleopp1, scaleopp2, brfd;

  1394.     int scaledvalue;

  1395. 

  1396.     brfd = FFMIN(v->brfd, 3);

  1397.     scalezone1_y  = vc1_b_field_mvpred_scales[4][brfd];

  1398.     zone1offset_y = vc1_b_field_mvpred_scales[6][brfd];

  1399.     scaleopp1     = vc1_b_field_mvpred_scales[1][brfd];

  1400.     scaleopp2     = vc1_b_field_mvpred_scales[2][brfd];

  1401. 

  1402.     if (FFABS(n) > 63)

  1403.         scaledvalue = n;

  1404.     else {

  1405.         if (FFABS(n) < scalezone1_y)

  1406.             scaledvalue = (n * scaleopp1) >> 8;

  1407.         else {

  1408.             if (n < 0)

  1409.                 scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_y;

  1410.             else

  1411.                 scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_y;

  1412.         }

  1413.     }

  1414.     if (v->cur_field_type && !v->ref_field_type[dir]) {

  1415.         return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);

  1416.     } else {

  1417.         return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);

  1418.     }

  1419. }

  1420. 

  1421. static av_always_inline int scaleforsame(VC1Context *v, int i, int n /* MV */,

  1422.                                          int dim, int dir)

  1423. {

  1424.     int brfd, scalesame;

  1425.     int hpel = 1 - v->s.quarter_sample;

  1426. 

  1427.     n >>= hpel;

  1428.     if (v->s.pict_type != AV_PICTURE_TYPE_B || v->second_field || !dir) {

  1429.         if (dim)

  1430.             n = scaleforsame_y(v, i, n, dir) << hpel;

  1431.         else

  1432.             n = scaleforsame_x(v, n, dir) << hpel;

  1433.         return n;

  1434.     }

  1435.     brfd      = FFMIN(v->brfd, 3);

  1436.     scalesame = vc1_b_field_mvpred_scales[0][brfd];

  1437. 

  1438.     n = (n * scalesame >> 8) << hpel;

  1439.     return n;

  1440. }

  1441. 

  1442. static av_always_inline int scaleforopp(VC1Context *v, int n /* MV */,

  1443.                                         int dim, int dir)

  1444. {

  1445.     int refdist, scaleopp;

  1446.     int hpel = 1 - v->s.quarter_sample;

  1447. 

  1448.     n >>= hpel;

  1449.     if (v->s.pict_type == AV_PICTURE_TYPE_B && !v->second_field && dir == 1) {

  1450.         if (dim)

  1451.             n = scaleforopp_y(v, n, dir) << hpel;

  1452.         else

  1453.             n = scaleforopp_x(v, n) << hpel;

  1454.         return n;

  1455.     }

  1456.     if (v->s.pict_type != AV_PICTURE_TYPE_B)

  1457.         refdist = FFMIN(v->refdist, 3);

  1458.     else

  1459.         refdist = dir ? v->brfd : v->frfd;

  1460.     scaleopp = vc1_field_mvpred_scales[dir ^ v->second_field][0][refdist];

  1461. 

  1462.     n = (n * scaleopp >> 8) << hpel;

  1463.     return n;

  1464. }

  1465. 

  1466. /** Predict and set motion vector

  1467.  */

  1468. static inline void vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y,

  1469.                                int mv1, int r_x, int r_y, uint8_t* is_intra,

  1470.                                int pred_flag, int dir)

  1471. {

  1472.     MpegEncContext *s = &v->s;

  1473.     int xy, wrap, off = 0;

  1474.     int16_t *A, *B, *C;

  1475.     int px, py;

  1476.     int sum;

  1477.     int mixedmv_pic, num_samefield = 0, num_oppfield = 0;

  1478.     int opposit, a_f, b_f, c_f;

  1479.     int16_t field_predA[2];

  1480.     int16_t field_predB[2];

  1481.     int16_t field_predC[2];

  1482.     int a_valid, b_valid, c_valid;

  1483.     int hybridmv_thresh, y_bias = 0;

  1484. 

  1485.     if (v->mv_mode == MV_PMODE_MIXED_MV ||

  1486.         ((v->mv_mode == MV_PMODE_INTENSITY_COMP) && (v->mv_mode2 == MV_PMODE_MIXED_MV)))

  1487.         mixedmv_pic = 1;

  1488.     else

  1489.         mixedmv_pic = 0;

  1490.     /* scale MV difference to be quad-pel */

  1491.     dmv_x <<= 1 - s->quarter_sample;

  1492.     dmv_y <<= 1 - s->quarter_sample;

  1493. 

  1494.     wrap = s->b8_stride;

  1495.     xy   = s->block_index[n];

  1496. 

  1497.     if (s->mb_intra) {

  1498.         s->mv[0][n][0] = s->current_picture.f.motion_val[0][xy + v->blocks_off][0] = 0;

  1499.         s->mv[0][n][1] = s->current_picture.f.motion_val[0][xy + v->blocks_off][1] = 0;

  1500.         s->current_picture.f.motion_val[1][xy + v->blocks_off][0] = 0;

  1501.         s->current_picture.f.motion_val[1][xy + v->blocks_off][1] = 0;

  1502.         if (mv1) { /* duplicate motion data for 1-MV block */

  1503.             s->current_picture.f.motion_val[0][xy + 1 + v->blocks_off][0]        = 0;

  1504.             s->current_picture.f.motion_val[0][xy + 1 + v->blocks_off][1]        = 0;

  1505.             s->current_picture.f.motion_val[0][xy + wrap + v->blocks_off][0]     = 0;

  1506.             s->current_picture.f.motion_val[0][xy + wrap + v->blocks_off][1]     = 0;

  1507.             s->current_picture.f.motion_val[0][xy + wrap + 1 + v->blocks_off][0] = 0;

  1508.             s->current_picture.f.motion_val[0][xy + wrap + 1 + v->blocks_off][1] = 0;

  1509.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  1510.             s->current_picture.f.motion_val[1][xy + 1 + v->blocks_off][0]        = 0;

  1511.             s->current_picture.f.motion_val[1][xy + 1 + v->blocks_off][1]        = 0;

  1512.             s->current_picture.f.motion_val[1][xy + wrap][0]                     = 0;

  1513.             s->current_picture.f.motion_val[1][xy + wrap + v->blocks_off][1]     = 0;

  1514.             s->current_picture.f.motion_val[1][xy + wrap + 1 + v->blocks_off][0] = 0;

  1515.             s->current_picture.f.motion_val[1][xy + wrap + 1 + v->blocks_off][1] = 0;

  1516.         }

  1517.         return;

  1518.     }

  1519. 

  1520.     C = s->current_picture.f.motion_val[dir][xy -    1 + v->blocks_off];

  1521.     A = s->current_picture.f.motion_val[dir][xy - wrap + v->blocks_off];

  1522.     if (mv1) {

  1523.         if (v->field_mode && mixedmv_pic)

  1524.             off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1525.         else

  1526.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1527.     } else {

  1528.         //in 4-MV mode different blocks have different B predictor position

  1529.         switch (n) {

  1530.         case 0:

  1531.             off = (s->mb_x > 0) ? -1 : 1;

  1532.             break;

  1533.         case 1:

  1534.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1535.             break;

  1536.         case 2:

  1537.             off = 1;

  1538.             break;

  1539.         case 3:

  1540.             off = -1;

  1541.         }

  1542.     }

  1543.     B = s->current_picture.f.motion_val[dir][xy - wrap + off + v->blocks_off];

  1544. 

  1545.     a_valid = !s->first_slice_line || (n == 2 || n == 3);

  1546.     b_valid = a_valid && (s->mb_width > 1);

  1547.     c_valid = s->mb_x || (n == 1 || n == 3);

  1548.     if (v->field_mode) {

  1549.         a_valid = a_valid && !is_intra[xy - wrap];

  1550.         b_valid = b_valid && !is_intra[xy - wrap + off];

  1551.         c_valid = c_valid && !is_intra[xy - 1];

  1552.     }

  1553. 

  1554.     if (a_valid) {

  1555.         a_f = v->mv_f[dir][xy - wrap + v->blocks_off];

  1556.         num_oppfield  += a_f;

  1557.         num_samefield += 1 - a_f;

  1558.         field_predA[0] = A[0];

  1559.         field_predA[1] = A[1];

  1560.     } else {

  1561.         field_predA[0] = field_predA[1] = 0;

  1562.         a_f = 0;

  1563.     }

  1564.     if (c_valid) {

  1565.         c_f = v->mv_f[dir][xy - 1 + v->blocks_off];

  1566.         num_oppfield  += c_f;

  1567.         num_samefield += 1 - c_f;

  1568.         field_predC[0] = C[0];

  1569.         field_predC[1] = C[1];

  1570.     } else {

  1571.         field_predC[0] = field_predC[1] = 0;

  1572.         c_f = 0;

  1573.     }

  1574.     if (b_valid) {

  1575.         b_f = v->mv_f[dir][xy - wrap + off + v->blocks_off];

  1576.         num_oppfield  += b_f;

  1577.         num_samefield += 1 - b_f;

  1578.         field_predB[0] = B[0];

  1579.         field_predB[1] = B[1];

  1580.     } else {

  1581.         field_predB[0] = field_predB[1] = 0;

  1582.         b_f = 0;

  1583.     }

  1584. 

  1585.     if (v->field_mode) {

  1586.         if (num_samefield <= num_oppfield)

  1587.             opposit = 1 - pred_flag;

  1588.         else

  1589.             opposit = pred_flag;

  1590.     } else

  1591.         opposit = 0;

  1592.     if (opposit) {

  1593.         if (a_valid && !a_f) {

  1594.             field_predA[0] = scaleforopp(v, field_predA[0], 0, dir);

  1595.             field_predA[1] = scaleforopp(v, field_predA[1], 1, dir);

  1596.         }

  1597.         if (b_valid && !b_f) {

  1598.             field_predB[0] = scaleforopp(v, field_predB[0], 0, dir);

  1599.             field_predB[1] = scaleforopp(v, field_predB[1], 1, dir);

  1600.         }

  1601.         if (c_valid && !c_f) {

  1602.             field_predC[0] = scaleforopp(v, field_predC[0], 0, dir);

  1603.             field_predC[1] = scaleforopp(v, field_predC[1], 1, dir);

  1604.         }

  1605.         v->mv_f[dir][xy + v->blocks_off] = 1;

  1606.         v->ref_field_type[dir] = !v->cur_field_type;

  1607.     } else {

  1608.         if (a_valid && a_f) {

  1609.             field_predA[0] = scaleforsame(v, n, field_predA[0], 0, dir);

  1610.             field_predA[1] = scaleforsame(v, n, field_predA[1], 1, dir);

  1611.         }

  1612.         if (b_valid && b_f) {

  1613.             field_predB[0] = scaleforsame(v, n, field_predB[0], 0, dir);

  1614.             field_predB[1] = scaleforsame(v, n, field_predB[1], 1, dir);

  1615.         }

  1616.         if (c_valid && c_f) {

  1617.             field_predC[0] = scaleforsame(v, n, field_predC[0], 0, dir);

  1618.             field_predC[1] = scaleforsame(v, n, field_predC[1], 1, dir);

  1619.         }

  1620.         v->mv_f[dir][xy + v->blocks_off] = 0;

  1621.         v->ref_field_type[dir] = v->cur_field_type;

  1622.     }

  1623. 

  1624.     if (a_valid) {

  1625.         px = field_predA[0];

  1626.         py = field_predA[1];

  1627.     } else if (c_valid) {

  1628.         px = field_predC[0];

  1629.         py = field_predC[1];

  1630.     } else if (b_valid) {

  1631.         px = field_predB[0];

  1632.         py = field_predB[1];

  1633.     } else {

  1634.         px = 0;

  1635.         py = 0;

  1636.     }

  1637. 

  1638.     if (num_samefield + num_oppfield > 1) {

  1639.         px = mid_pred(field_predA[0], field_predB[0], field_predC[0]);

  1640.         py = mid_pred(field_predA[1], field_predB[1], field_predC[1]);

  1641.     }

  1642. 

  1643.     /* Pullback MV as specified in 8.3.5.3.4 */

  1644.     if (!v->field_mode) {

  1645.         int qx, qy, X, Y;

  1646.         qx = (s->mb_x << 6) + ((n == 1 || n == 3) ? 32 : 0);

  1647.         qy = (s->mb_y << 6) + ((n == 2 || n == 3) ? 32 : 0);

  1648.         X  = (s->mb_width  << 6) - 4;

  1649.         Y  = (s->mb_height << 6) - 4;

  1650.         if (mv1) {

  1651.             if (qx + px < -60) px = -60 - qx;

  1652.             if (qy + py < -60) py = -60 - qy;

  1653.         } else {

  1654.             if (qx + px < -28) px = -28 - qx;

  1655.             if (qy + py < -28) py = -28 - qy;

  1656.         }

  1657.         if (qx + px > X) px = X - qx;

  1658.         if (qy + py > Y) py = Y - qy;

  1659.     }

  1660. 

  1661.     if (!v->field_mode || s->pict_type != AV_PICTURE_TYPE_B) {

  1662.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 (also 10.3.5.4.3.5) */

  1663.         if (v->field_mode && !s->quarter_sample)

  1664.             hybridmv_thresh = 16;

  1665.         else

  1666.             hybridmv_thresh = 32;

  1667.         if (a_valid && c_valid) {

  1668.             if (is_intra[xy - wrap])

  1669.                 sum = FFABS(px) + FFABS(py);

  1670.             else

  1671.                 sum = FFABS(px - field_predA[0]) + FFABS(py - field_predA[1]);

  1672.             if (sum > hybridmv_thresh) {

  1673.                 if (get_bits1(&s->gb)) {     // read HYBRIDPRED bit

  1674.                     px = field_predA[0];

  1675.                     py = field_predA[1];

  1676.                 } else {

  1677.                     px = field_predC[0];

  1678.                     py = field_predC[1];

  1679.                 }

  1680.             } else {

  1681.                 if (is_intra[xy - 1])

  1682.                     sum = FFABS(px) + FFABS(py);

  1683.                 else

  1684.                     sum = FFABS(px - field_predC[0]) + FFABS(py - field_predC[1]);

  1685.                 if (sum > hybridmv_thresh) {

  1686.                     if (get_bits1(&s->gb)) {

  1687.                         px = field_predA[0];

  1688.                         py = field_predA[1];

  1689.                     } else {

  1690.                         px = field_predC[0];

  1691.                         py = field_predC[1];

  1692.                     }

  1693.                 }

  1694.             }

  1695.         }

  1696.     }

  1697. 

  1698.     if (v->field_mode && !s->quarter_sample) {

  1699.         r_x <<= 1;

  1700.         r_y <<= 1;

  1701.     }

  1702.     if (v->field_mode && v->numref)

  1703.         r_y >>= 1;

  1704.     if (v->field_mode && v->cur_field_type && v->ref_field_type[dir] == 0)

  1705.         y_bias = 1;

  1706.     /* store MV using signed modulus of MV range defined in 4.11 */

  1707.     s->mv[dir][n][0] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1708.     s->mv[dir][n][1] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][1] = ((py + dmv_y + r_y - y_bias) & ((r_y << 1) - 1)) - r_y + y_bias;

  1709.     if (mv1) { /* duplicate motion data for 1-MV block */

  1710.         s->current_picture.f.motion_val[dir][xy +    1 +     v->blocks_off][0] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][0];

  1711.         s->current_picture.f.motion_val[dir][xy +    1 +     v->blocks_off][1] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][1];

  1712.         s->current_picture.f.motion_val[dir][xy + wrap +     v->blocks_off][0] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][0];

  1713.         s->current_picture.f.motion_val[dir][xy + wrap +     v->blocks_off][1] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][1];

  1714.         s->current_picture.f.motion_val[dir][xy + wrap + 1 + v->blocks_off][0] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][0];

  1715.         s->current_picture.f.motion_val[dir][xy + wrap + 1 + v->blocks_off][1] = s->current_picture.f.motion_val[dir][xy + v->blocks_off][1];

  1716.         v->mv_f[dir][xy +    1 + v->blocks_off] = v->mv_f[dir][xy +            v->blocks_off];

  1717.         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];

  1718.     }

  1719. }

  1720. 

  1721. /** Predict and set motion vector for interlaced frame picture MBs

  1722.  */

  1723. static inline void vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,

  1724.                                      int mvn, int r_x, int r_y, uint8_t* is_intra)

  1725. {

  1726.     MpegEncContext *s = &v->s;

  1727.     int xy, wrap, off = 0;

  1728.     int A[2], B[2], C[2];

  1729.     int px, py;

  1730.     int a_valid = 0, b_valid = 0, c_valid = 0;

  1731.     int field_a, field_b, field_c; // 0: same, 1: opposit

  1732.     int total_valid, num_samefield, num_oppfield;

  1733.     int pos_c, pos_b, n_adj;

  1734. 

  1735.     wrap = s->b8_stride;

  1736.     xy = s->block_index[n];

  1737. 

  1738.     if (s->mb_intra) {

  1739.         s->mv[0][n][0] = s->current_picture.f.motion_val[0][xy][0] = 0;

  1740.         s->mv[0][n][1] = s->current_picture.f.motion_val[0][xy][1] = 0;

  1741.         s->current_picture.f.motion_val[1][xy][0] = 0;

  1742.         s->current_picture.f.motion_val[1][xy][1] = 0;

  1743.         if (mvn == 1) { /* duplicate motion data for 1-MV block */

  1744.             s->current_picture.f.motion_val[0][xy + 1][0]        = 0;

  1745.             s->current_picture.f.motion_val[0][xy + 1][1]        = 0;

  1746.             s->current_picture.f.motion_val[0][xy + wrap][0]     = 0;

  1747.             s->current_picture.f.motion_val[0][xy + wrap][1]     = 0;

  1748.             s->current_picture.f.motion_val[0][xy + wrap + 1][0] = 0;

  1749.             s->current_picture.f.motion_val[0][xy + wrap + 1][1] = 0;

  1750.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  1751.             s->current_picture.f.motion_val[1][xy + 1][0]        = 0;

  1752.             s->current_picture.f.motion_val[1][xy + 1][1]        = 0;

  1753.             s->current_picture.f.motion_val[1][xy + wrap][0]     = 0;

  1754.             s->current_picture.f.motion_val[1][xy + wrap][1]     = 0;

  1755.             s->current_picture.f.motion_val[1][xy + wrap + 1][0] = 0;

  1756.             s->current_picture.f.motion_val[1][xy + wrap + 1][1] = 0;

  1757.         }

  1758.         return;

  1759.     }

  1760. 

  1761.     off = ((n == 0) || (n == 1)) ? 1 : -1;

  1762.     /* predict A */

  1763.     if (s->mb_x || (n == 1) || (n == 3)) {

  1764.         if ((v->blk_mv_type[xy]) // current block (MB) has a field MV

  1765.             || (!v->blk_mv_type[xy] && !v->blk_mv_type[xy - 1])) { // or both have frame MV

  1766.             A[0] = s->current_picture.f.motion_val[0][xy - 1][0];

  1767.             A[1] = s->current_picture.f.motion_val[0][xy - 1][1];

  1768.             a_valid = 1;

  1769.         } else { // current block has frame mv and cand. has field MV (so average)

  1770.             A[0] = (s->current_picture.f.motion_val[0][xy - 1][0]

  1771.                     + s->current_picture.f.motion_val[0][xy - 1 + off * wrap][0] + 1) >> 1;

  1772.             A[1] = (s->current_picture.f.motion_val[0][xy - 1][1]

  1773.                     + s->current_picture.f.motion_val[0][xy - 1 + off * wrap][1] + 1) >> 1;

  1774.             a_valid = 1;

  1775.         }

  1776.         if (!(n & 1) && v->is_intra[s->mb_x - 1]) {

  1777.             a_valid = 0;

  1778.             A[0] = A[1] = 0;

  1779.         }

  1780.     } else

  1781.         A[0] = A[1] = 0;

  1782.     /* Predict B and C */

  1783.     B[0] = B[1] = C[0] = C[1] = 0;

  1784.     if (n == 0 || n == 1 || v->blk_mv_type[xy]) {

  1785.         if (!s->first_slice_line) {

  1786.             if (!v->is_intra[s->mb_x - s->mb_stride]) {

  1787.                 b_valid = 1;

  1788.                 n_adj   = n | 2;

  1789.                 pos_b   = s->block_index[n_adj] - 2 * wrap;

  1790.                 if (v->blk_mv_type[pos_b] && v->blk_mv_type[xy]) {

  1791.                     n_adj = (n & 2) | (n & 1);

  1792.                 }

  1793.                 B[0] = s->current_picture.f.motion_val[0][s->block_index[n_adj] - 2 * wrap][0];

  1794.                 B[1] = s->current_picture.f.motion_val[0][s->block_index[n_adj] - 2 * wrap][1];

  1795.                 if (v->blk_mv_type[pos_b] && !v->blk_mv_type[xy]) {

  1796.                     B[0] = (B[0] + s->current_picture.f.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap][0] + 1) >> 1;

  1797.                     B[1] = (B[1] + s->current_picture.f.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap][1] + 1) >> 1;

  1798.                 }

  1799.             }

  1800.             if (s->mb_width > 1) {

  1801.                 if (!v->is_intra[s->mb_x - s->mb_stride + 1]) {

  1802.                     c_valid = 1;

  1803.                     n_adj   = 2;

  1804.                     pos_c   = s->block_index[2] - 2 * wrap + 2;

  1805.                     if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {

  1806.                         n_adj = n & 2;

  1807.                     }

  1808.                     C[0] = s->current_picture.f.motion_val[0][s->block_index[n_adj] - 2 * wrap + 2][0];

  1809.                     C[1] = s->current_picture.f.motion_val[0][s->block_index[n_adj] - 2 * wrap + 2][1];

  1810.                     if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {

  1811.                         C[0] = (1 + C[0] + (s->current_picture.f.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap + 2][0])) >> 1;

  1812.                         C[1] = (1 + C[1] + (s->current_picture.f.motion_val[0][s->block_index[n_adj ^ 2] - 2 * wrap + 2][1])) >> 1;

  1813.                     }

  1814.                     if (s->mb_x == s->mb_width - 1) {

  1815.                         if (!v->is_intra[s->mb_x - s->mb_stride - 1]) {

  1816.                             c_valid = 1;

  1817.                             n_adj   = 3;

  1818.                             pos_c   = s->block_index[3] - 2 * wrap - 2;

  1819.                             if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {

  1820.                                 n_adj = n | 1;

  1821.                             }

  1822.                             C[0] = s->current_picture.f.motion_val[0][s->block_index[n_adj] - 2 * wrap - 2][0];

  1823.                             C[1] = s->current_picture.f.motion_val[0][s->block_index[n_adj] - 2 * wrap - 2][1];

  1824.                             if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {

  1825.                                 C[0] = (1 + C[0] + s->current_picture.f.motion_val[0][s->block_index[1] - 2 * wrap - 2][0]) >> 1;

  1826.                                 C[1] = (1 + C[1] + s->current_picture.f.motion_val[0][s->block_index[1] - 2 * wrap - 2][1]) >> 1;

  1827.                             }

  1828.                         } else

  1829.                             c_valid = 0;

  1830.                     }

  1831.                 }

  1832.             }

  1833.         }

  1834.     } else {

  1835.         pos_b   = s->block_index[1];

  1836.         b_valid = 1;

  1837.         B[0]    = s->current_picture.f.motion_val[0][pos_b][0];

  1838.         B[1]    = s->current_picture.f.motion_val[0][pos_b][1];

  1839.         pos_c   = s->block_index[0];

  1840.         c_valid = 1;

  1841.         C[0]    = s->current_picture.f.motion_val[0][pos_c][0];

  1842.         C[1]    = s->current_picture.f.motion_val[0][pos_c][1];

  1843.     }

  1844. 

  1845.     total_valid = a_valid + b_valid + c_valid;

  1846.     // check if predictor A is out of bounds

  1847.     if (!s->mb_x && !(n == 1 || n == 3)) {

  1848.         A[0] = A[1] = 0;

  1849.     }

  1850.     // check if predictor B is out of bounds

  1851.     if ((s->first_slice_line && v->blk_mv_type[xy]) || (s->first_slice_line && !(n & 2))) {

  1852.         B[0] = B[1] = C[0] = C[1] = 0;

  1853.     }

  1854.     if (!v->blk_mv_type[xy]) {

  1855.         if (s->mb_width == 1) {

  1856.             px = B[0];

  1857.             py = B[1];

  1858.         } else {

  1859.             if (total_valid >= 2) {

  1860.                 px = mid_pred(A[0], B[0], C[0]);

  1861.                 py = mid_pred(A[1], B[1], C[1]);

  1862.             } else if (total_valid) {

  1863.                 if (a_valid) { px = A[0]; py = A[1]; }

  1864.                 if (b_valid) { px = B[0]; py = B[1]; }

  1865.                 if (c_valid) { px = C[0]; py = C[1]; }

  1866.             } else

  1867.                 px = py = 0;

  1868.         }

  1869.     } else {

  1870.         if (a_valid)

  1871.             field_a = (A[1] & 4) ? 1 : 0;

  1872.         else

  1873.             field_a = 0;

  1874.         if (b_valid)

  1875.             field_b = (B[1] & 4) ? 1 : 0;

  1876.         else

  1877.             field_b = 0;

  1878.         if (c_valid)

  1879.             field_c = (C[1] & 4) ? 1 : 0;

  1880.         else

  1881.             field_c = 0;

  1882. 

  1883.         num_oppfield  = field_a + field_b + field_c;

  1884.         num_samefield = total_valid - num_oppfield;

  1885.         if (total_valid == 3) {

  1886.             if ((num_samefield == 3) || (num_oppfield == 3)) {

  1887.                 px = mid_pred(A[0], B[0], C[0]);

  1888.                 py = mid_pred(A[1], B[1], C[1]);

  1889.             } else if (num_samefield >= num_oppfield) {

  1890.                 /* take one MV from same field set depending on priority

  1891.                 the check for B may not be necessary */

  1892.                 px = !field_a ? A[0] : B[0];

  1893.                 py = !field_a ? A[1] : B[1];

  1894.             } else {

  1895.                 px =  field_a ? A[0] : B[0];

  1896.                 py =  field_a ? A[1] : B[1];

  1897.             }

  1898.         } else if (total_valid == 2) {

  1899.             if (num_samefield >= num_oppfield) {

  1900.                 if (!field_a && a_valid) {

  1901.                     px = A[0];

  1902.                     py = A[1];

  1903.                 } else if (!field_b && b_valid) {

  1904.                     px = B[0];

  1905.                     py = B[1];

  1906.                 } else if (c_valid) {

  1907.                     px = C[0];

  1908.                     py = C[1];

  1909.                 } else px = py = 0;

  1910.             } else {

  1911.                 if (field_a && a_valid) {

  1912.                     px = A[0];

  1913.                     py = A[1];

  1914.                 } else if (field_b && b_valid) {

  1915.                     px = B[0];

  1916.                     py = B[1];

  1917.                 } else if (c_valid) {

  1918.                     px = C[0];

  1919.                     py = C[1];

  1920.                 }

  1921.             }

  1922.         } else if (total_valid == 1) {

  1923.             px = (a_valid) ? A[0] : ((b_valid) ? B[0] : C[0]);

  1924.             py = (a_valid) ? A[1] : ((b_valid) ? B[1] : C[1]);

  1925.         } else

  1926.             px = py = 0;

  1927.     }

  1928. 

  1929.     /* store MV using signed modulus of MV range defined in 4.11 */

  1930.     s->mv[0][n][0] = s->current_picture.f.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1931.     s->mv[0][n][1] = s->current_picture.f.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1932.     if (mvn == 1) { /* duplicate motion data for 1-MV block */

  1933.         s->current_picture.f.motion_val[0][xy +    1    ][0] = s->current_picture.f.motion_val[0][xy][0];

  1934.         s->current_picture.f.motion_val[0][xy +    1    ][1] = s->current_picture.f.motion_val[0][xy][1];

  1935.         s->current_picture.f.motion_val[0][xy + wrap    ][0] = s->current_picture.f.motion_val[0][xy][0];

  1936.         s->current_picture.f.motion_val[0][xy + wrap    ][1] = s->current_picture.f.motion_val[0][xy][1];

  1937.         s->current_picture.f.motion_val[0][xy + wrap + 1][0] = s->current_picture.f.motion_val[0][xy][0];

  1938.         s->current_picture.f.motion_val[0][xy + wrap + 1][1] = s->current_picture.f.motion_val[0][xy][1];

  1939.     } else if (mvn == 2) { /* duplicate motion data for 2-Field MV block */

  1940.         s->current_picture.f.motion_val[0][xy + 1][0] = s->current_picture.f.motion_val[0][xy][0];

  1941.         s->current_picture.f.motion_val[0][xy + 1][1] = s->current_picture.f.motion_val[0][xy][1];

  1942.         s->mv[0][n + 1][0] = s->mv[0][n][0];

  1943.         s->mv[0][n + 1][1] = s->mv[0][n][1];

  1944.     }

  1945. }

  1946. 

  1947. /** Motion compensation for direct or interpolated blocks in B-frames

  1948.  */

  1949. static void vc1_interp_mc(VC1Context *v)

  1950. {

  1951.     MpegEncContext *s = &v->s;

  1952.     DSPContext *dsp = &v->s.dsp;

  1953.     uint8_t *srcY, *srcU, *srcV;

  1954.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1955.     int off, off_uv;

  1956.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  1957. 

  1958.     if (!v->field_mode && !v->s.next_picture.f.data[0])

  1959.         return;

  1960. 

  1961.     mx   = s->mv[1][0][0];

  1962.     my   = s->mv[1][0][1];

  1963.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1964.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1965.     if (v->field_mode) {

  1966.         if (v->cur_field_type != v->ref_field_type[1])

  1967.             my   = my   - 2 + 4 * v->cur_field_type;

  1968.             uvmy = uvmy - 2 + 4 * v->cur_field_type;

  1969.     }

  1970.     if (v->fastuvmc) {

  1971.         uvmx = uvmx + ((uvmx < 0) ? -(uvmx & 1) : (uvmx & 1));

  1972.         uvmy = uvmy + ((uvmy < 0) ? -(uvmy & 1) : (uvmy & 1));

  1973.     }

  1974.     srcY = s->next_picture.f.data[0];

  1975.     srcU = s->next_picture.f.data[1];

  1976.     srcV = s->next_picture.f.data[2];

  1977. 

  1978.     src_x   = s->mb_x * 16 + (mx   >> 2);

  1979.     src_y   = s->mb_y * 16 + (my   >> 2);

  1980.     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);

  1981.     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);

  1982. 

  1983.     if (v->profile != PROFILE_ADVANCED) {

  1984.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1985.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1986.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1987.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1988.     } else {

  1989.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1990.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1991.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1992.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1993.     }

  1994. 

  1995.     srcY += src_y   * s->linesize   + src_x;

  1996.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1997.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1998. 

  1999.     if (v->field_mode && v->ref_field_type[1]) {

  2000.         srcY += s->current_picture_ptr->f.linesize[0];

  2001.         srcU += s->current_picture_ptr->f.linesize[1];

  2002.         srcV += s->current_picture_ptr->f.linesize[2];

  2003.     }

  2004. 

  2005.     /* for grayscale we should not try to read from unknown area */

  2006.     if (s->flags & CODEC_FLAG_GRAY) {

  2007.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  2008.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  2009.     }

  2010. 

  2011.     if (v->rangeredfrm

  2012.         || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx & 3) - 16 - s->mspel * 3

  2013.         || (unsigned)(src_y - s->mspel) > v_edge_pos    - (my & 3) - 16 - s->mspel * 3) {

  2014.         uint8_t *uvbuf = s->edge_emu_buffer + 19 * s->linesize;

  2015. 

  2016.         srcY -= s->mspel * (1 + s->linesize);

  2017.         s->dsp.emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize,

  2018.                                 17 + s->mspel * 2, 17 + s->mspel * 2,

  2019.                                 src_x - s->mspel, src_y - s->mspel,

  2020.                                 s->h_edge_pos, v_edge_pos);

  2021.         srcY = s->edge_emu_buffer;

  2022.         s->dsp.emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8 + 1, 8 + 1,

  2023.                                 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);

  2024.         s->dsp.emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8 + 1, 8 + 1,

  2025.                                 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);

  2026.         srcU = uvbuf;

  2027.         srcV = uvbuf + 16;

  2028.         /* if we deal with range reduction we need to scale source blocks */

  2029.         if (v->rangeredfrm) {

  2030.             int i, j;

  2031.             uint8_t *src, *src2;

  2032. 

  2033.             src = srcY;

  2034.             for (j = 0; j < 17 + s->mspel * 2; j++) {

  2035.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  2036.                     src[i] = ((src[i] - 128) >> 1) + 128;

  2037.                 src += s->linesize;

  2038.             }

  2039.             src = srcU;

  2040.             src2 = srcV;

  2041.             for (j = 0; j < 9; j++) {

  2042.                 for (i = 0; i < 9; i++) {

  2043.                     src[i]  = ((src[i]  - 128) >> 1) + 128;

  2044.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  2045.                 }

  2046.                 src  += s->uvlinesize;

  2047.                 src2 += s->uvlinesize;

  2048.             }

  2049.         }

  2050.         srcY += s->mspel * (1 + s->linesize);

  2051.     }

  2052. 

  2053.     if (v->field_mode && v->cur_field_type) {

  2054.         off    = s->current_picture_ptr->f.linesize[0];

  2055.         off_uv = s->current_picture_ptr->f.linesize[1];

  2056.     } else {

  2057.         off    = 0;

  2058.         off_uv = 0;

  2059.     }

  2060. 

  2061.     if (s->mspel) {

  2062.         dxy = ((my & 3) << 2) | (mx & 3);

  2063.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off    , srcY    , s->linesize, v->rnd);

  2064.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8, srcY + 8, s->linesize, v->rnd);

  2065.         srcY += s->linesize * 8;

  2066.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  2067.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  2068.     } else { // hpel mc

  2069.         dxy = (my & 2) | ((mx & 2) >> 1);

  2070. 

  2071.         if (!v->rnd)

  2072.             dsp->avg_pixels_tab[0][dxy](s->dest[0] + off, srcY, s->linesize, 16);

  2073.         else

  2074.             dsp->avg_no_rnd_pixels_tab[0][dxy](s->dest[0] + off, srcY, s->linesize, 16);

  2075.     }

  2076. 

  2077.     if (s->flags & CODEC_FLAG_GRAY) return;

  2078.     /* Chroma MC always uses qpel blilinear */

  2079.     uvmx = (uvmx & 3) << 1;

  2080.     uvmy = (uvmy & 3) << 1;

  2081.     if (!v->rnd) {

  2082.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  2083.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  2084.     } else {

  2085.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  2086.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  2087.     }

  2088. }

  2089. 

  2090. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  2091. {

  2092.     int n = bfrac;

  2093. 

  2094. #if B_FRACTION_DEN==256

  2095.     if (inv)

  2096.         n -= 256;

  2097.     if (!qs)

  2098.         return 2 * ((value * n + 255) >> 9);

  2099.     return (value * n + 128) >> 8;

  2100. #else

  2101.     if (inv)

  2102.         n -= B_FRACTION_DEN;

  2103.     if (!qs)

  2104.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  2105.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  2106. #endif

  2107. }

  2108. 

  2109. static av_always_inline int scale_mv_intfi(int value, int bfrac, int inv,

  2110.                                            int qs, int qs_last)

  2111. {

  2112.     int n = bfrac;

  2113. 

  2114.     if (inv)

  2115.         n -= 256;

  2116.     n <<= !qs_last;

  2117.     if (!qs)

  2118.         return (value * n + 255) >> 9;

  2119.     else

  2120.         return (value * n + 128) >> 8;

  2121. }

  2122. 

  2123. /** Reconstruct motion vector for B-frame and do motion compensation

  2124.  */

  2125. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],

  2126.                             int direct, int mode)

  2127. {

  2128.     if (v->use_ic) {

  2129.         v->mv_mode2 = v->mv_mode;

  2130.         v->mv_mode  = MV_PMODE_INTENSITY_COMP;

  2131.     }

  2132.     if (direct) {

  2133.         vc1_mc_1mv(v, 0);

  2134.         vc1_interp_mc(v);

  2135.         if (v->use_ic)

  2136.             v->mv_mode = v->mv_mode2;

  2137.         return;

  2138.     }

  2139.     if (mode == BMV_TYPE_INTERPOLATED) {

  2140.         vc1_mc_1mv(v, 0);

  2141.         vc1_interp_mc(v);

  2142.         if (v->use_ic)

  2143.             v->mv_mode = v->mv_mode2;

  2144.         return;

  2145.     }

  2146. 

  2147.     if (v->use_ic && (mode == BMV_TYPE_BACKWARD))

  2148.         v->mv_mode = v->mv_mode2;

  2149.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  2150.     if (v->use_ic)

  2151.         v->mv_mode = v->mv_mode2;

  2152. }

  2153. 

  2154. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],

  2155.                                  int direct, int mvtype)

  2156. {

  2157.     MpegEncContext *s = &v->s;

  2158.     int xy, wrap, off = 0;

  2159.     int16_t *A, *B, *C;

  2160.     int px, py;

  2161.     int sum;

  2162.     int r_x, r_y;

  2163.     const uint8_t *is_intra = v->mb_type[0];

  2164. 

  2165.     r_x = v->range_x;

  2166.     r_y = v->range_y;

  2167.     /* scale MV difference to be quad-pel */

  2168.     dmv_x[0] <<= 1 - s->quarter_sample;

  2169.     dmv_y[0] <<= 1 - s->quarter_sample;

  2170.     dmv_x[1] <<= 1 - s->quarter_sample;

  2171.     dmv_y[1] <<= 1 - s->quarter_sample;

  2172. 

  2173.     wrap = s->b8_stride;

  2174.     xy = s->block_index[0];

  2175. 

  2176.     if (s->mb_intra) {

  2177.         s->current_picture.f.motion_val[0][xy + v->blocks_off][0] =

  2178.         s->current_picture.f.motion_val[0][xy + v->blocks_off][1] =

  2179.         s->current_picture.f.motion_val[1][xy + v->blocks_off][0] =

  2180.         s->current_picture.f.motion_val[1][xy + v->blocks_off][1] = 0;

  2181.         return;

  2182.     }

  2183.     if (!v->field_mode) {

  2184.         s->mv[0][0][0] = scale_mv(s->next_picture.f.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  2185.         s->mv[0][0][1] = scale_mv(s->next_picture.f.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  2186.         s->mv[1][0][0] = scale_mv(s->next_picture.f.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  2187.         s->mv[1][0][1] = scale_mv(s->next_picture.f.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  2188. 

  2189.         /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  2190.         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));

  2191.         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));

  2192.         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));

  2193.         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));

  2194.     }

  2195.     if (direct) {

  2196.         s->current_picture.f.motion_val[0][xy + v->blocks_off][0] = s->mv[0][0][0];

  2197.         s->current_picture.f.motion_val[0][xy + v->blocks_off][1] = s->mv[0][0][1];

  2198.         s->current_picture.f.motion_val[1][xy + v->blocks_off][0] = s->mv[1][0][0];

  2199.         s->current_picture.f.motion_val[1][xy + v->blocks_off][1] = s->mv[1][0][1];

  2200.         return;

  2201.     }

  2202. 

  2203.     if ((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2204.         C   = s->current_picture.f.motion_val[0][xy - 2];

  2205.         A   = s->current_picture.f.motion_val[0][xy - wrap * 2];

  2206.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2207.         B   = s->current_picture.f.motion_val[0][xy - wrap * 2 + off];

  2208. 

  2209.         if (!s->mb_x) C[0] = C[1] = 0;

  2210.         if (!s->first_slice_line) { // predictor A is not out of bounds

  2211.             if (s->mb_width == 1) {

  2212.                 px = A[0];

  2213.                 py = A[1];

  2214.             } else {

  2215.                 px = mid_pred(A[0], B[0], C[0]);

  2216.                 py = mid_pred(A[1], B[1], C[1]);

  2217.             }

  2218.         } else if (s->mb_x) { // predictor C is not out of bounds

  2219.             px = C[0];

  2220.             py = C[1];

  2221.         } else {

  2222.             px = py = 0;

  2223.         }

  2224.         /* Pullback MV as specified in 8.3.5.3.4 */

  2225.         {

  2226.             int qx, qy, X, Y;

  2227.             if (v->profile < PROFILE_ADVANCED) {

  2228.                 qx = (s->mb_x << 5);

  2229.                 qy = (s->mb_y << 5);

  2230.                 X  = (s->mb_width  << 5) - 4;

  2231.                 Y  = (s->mb_height << 5) - 4;

  2232.                 if (qx + px < -28) px = -28 - qx;

  2233.                 if (qy + py < -28) py = -28 - qy;

  2234.                 if (qx + px > X) px = X - qx;

  2235.                 if (qy + py > Y) py = Y - qy;

  2236.             } else {

  2237.                 qx = (s->mb_x << 6);

  2238.                 qy = (s->mb_y << 6);

  2239.                 X  = (s->mb_width  << 6) - 4;

  2240.                 Y  = (s->mb_height << 6) - 4;

  2241.                 if (qx + px < -60) px = -60 - qx;

  2242.                 if (qy + py < -60) py = -60 - qy;

  2243.                 if (qx + px > X) px = X - qx;

  2244.                 if (qy + py > Y) py = Y - qy;

  2245.             }

  2246.         }

  2247.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2248.         if (0 && !s->first_slice_line && s->mb_x) {

  2249.             if (is_intra[xy - wrap])

  2250.                 sum = FFABS(px) + FFABS(py);

  2251.             else

  2252.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2253.             if (sum > 32) {

  2254.                 if (get_bits1(&s->gb)) {

  2255.                     px = A[0];

  2256.                     py = A[1];

  2257.                 } else {

  2258.                     px = C[0];

  2259.                     py = C[1];

  2260.                 }

  2261.             } else {

  2262.                 if (is_intra[xy - 2])

  2263.                     sum = FFABS(px) + FFABS(py);

  2264.                 else

  2265.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2266.                 if (sum > 32) {

  2267.                     if (get_bits1(&s->gb)) {

  2268.                         px = A[0];

  2269.                         py = A[1];

  2270.                     } else {

  2271.                         px = C[0];

  2272.                         py = C[1];

  2273.                     }

  2274.                 }

  2275.             }

  2276.         }

  2277.         /* store MV using signed modulus of MV range defined in 4.11 */

  2278.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2279.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2280.     }

  2281.     if ((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2282.         C   = s->current_picture.f.motion_val[1][xy - 2];

  2283.         A   = s->current_picture.f.motion_val[1][xy - wrap * 2];

  2284.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2285.         B   = s->current_picture.f.motion_val[1][xy - wrap * 2 + off];

  2286. 

  2287.         if (!s->mb_x)

  2288.             C[0] = C[1] = 0;

  2289.         if (!s->first_slice_line) { // predictor A is not out of bounds

  2290.             if (s->mb_width == 1) {

  2291.                 px = A[0];

  2292.                 py = A[1];

  2293.             } else {

  2294.                 px = mid_pred(A[0], B[0], C[0]);

  2295.                 py = mid_pred(A[1], B[1], C[1]);

  2296.             }

  2297.         } else if (s->mb_x) { // predictor C is not out of bounds

  2298.             px = C[0];

  2299.             py = C[1];

  2300.         } else {

  2301.             px = py = 0;

  2302.         }

  2303.         /* Pullback MV as specified in 8.3.5.3.4 */

  2304.         {

  2305.             int qx, qy, X, Y;

  2306.             if (v->profile < PROFILE_ADVANCED) {

  2307.                 qx = (s->mb_x << 5);

  2308.                 qy = (s->mb_y << 5);

  2309.                 X  = (s->mb_width  << 5) - 4;

  2310.                 Y  = (s->mb_height << 5) - 4;

  2311.                 if (qx + px < -28) px = -28 - qx;

  2312.                 if (qy + py < -28) py = -28 - qy;

  2313.                 if (qx + px > X) px = X - qx;

  2314.                 if (qy + py > Y) py = Y - qy;

  2315.             } else {

  2316.                 qx = (s->mb_x << 6);

  2317.                 qy = (s->mb_y << 6);

  2318.                 X  = (s->mb_width  << 6) - 4;

  2319.                 Y  = (s->mb_height << 6) - 4;

  2320.                 if (qx + px < -60) px = -60 - qx;

  2321.                 if (qy + py < -60) py = -60 - qy;

  2322.                 if (qx + px > X) px = X - qx;

  2323.                 if (qy + py > Y) py = Y - qy;

  2324.             }

  2325.         }

  2326.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2327.         if (0 && !s->first_slice_line && s->mb_x) {

  2328.             if (is_intra[xy - wrap])

  2329.                 sum = FFABS(px) + FFABS(py);

  2330.             else

  2331.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2332.             if (sum > 32) {

  2333.                 if (get_bits1(&s->gb)) {

  2334.                     px = A[0];

  2335.                     py = A[1];

  2336.                 } else {

  2337.                     px = C[0];

  2338.                     py = C[1];

  2339.                 }

  2340.             } else {

  2341.                 if (is_intra[xy - 2])

  2342.                     sum = FFABS(px) + FFABS(py);

  2343.                 else

  2344.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2345.                 if (sum > 32) {

  2346.                     if (get_bits1(&s->gb)) {

  2347.                         px = A[0];

  2348.                         py = A[1];

  2349.                     } else {

  2350.                         px = C[0];

  2351.                         py = C[1];

  2352.                     }

  2353.                 }

  2354.             }

  2355.         }

  2356.         /* store MV using signed modulus of MV range defined in 4.11 */

  2357. 

  2358.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2359.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2360.     }

  2361.     s->current_picture.f.motion_val[0][xy][0] = s->mv[0][0][0];

  2362.     s->current_picture.f.motion_val[0][xy][1] = s->mv[0][0][1];

  2363.     s->current_picture.f.motion_val[1][xy][0] = s->mv[1][0][0];

  2364.     s->current_picture.f.motion_val[1][xy][1] = s->mv[1][0][1];

  2365. }

  2366. 

  2367. static inline void vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, int mv1, int *pred_flag)

  2368. {

  2369.     int dir = (v->bmvtype == BMV_TYPE_BACKWARD) ? 1 : 0;

  2370.     MpegEncContext *s = &v->s;

  2371.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2372. 

  2373.     if (v->bmvtype == BMV_TYPE_DIRECT) {

  2374.         int total_opp, k, f;

  2375.         if (s->next_picture.f.mb_type[mb_pos + v->mb_off] != MB_TYPE_INTRA) {

  2376.             s->mv[0][0][0] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0],

  2377.                                             v->bfraction, 0, s->quarter_sample, v->qs_last);

  2378.             s->mv[0][0][1] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1],

  2379.                                             v->bfraction, 0, s->quarter_sample, v->qs_last);

  2380.             s->mv[1][0][0] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0],

  2381.                                             v->bfraction, 1, s->quarter_sample, v->qs_last);

  2382.             s->mv[1][0][1] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1],

  2383.                                             v->bfraction, 1, s->quarter_sample, v->qs_last);

  2384. 

  2385.             total_opp = v->mv_f_next[0][s->block_index[0] + v->blocks_off]

  2386.                       + v->mv_f_next[0][s->block_index[1] + v->blocks_off]

  2387.                       + v->mv_f_next[0][s->block_index[2] + v->blocks_off]

  2388.                       + v->mv_f_next[0][s->block_index[3] + v->blocks_off];

  2389.             f = (total_opp > 2) ? 1 : 0;

  2390.         } else {

  2391.             s->mv[0][0][0] = s->mv[0][0][1] = 0;

  2392.             s->mv[1][0][0] = s->mv[1][0][1] = 0;

  2393.             f = 0;

  2394.         }

  2395.         v->ref_field_type[0] = v->ref_field_type[1] = v->cur_field_type ^ f;

  2396.         for (k = 0; k < 4; k++) {

  2397.             s->current_picture.f.motion_val[0][s->block_index[k] + v->blocks_off][0] = s->mv[0][0][0];

  2398.             s->current_picture.f.motion_val[0][s->block_index[k] + v->blocks_off][1] = s->mv[0][0][1];

  2399.             s->current_picture.f.motion_val[1][s->block_index[k] + v->blocks_off][0] = s->mv[1][0][0];

  2400.             s->current_picture.f.motion_val[1][s->block_index[k] + v->blocks_off][1] = s->mv[1][0][1];

  2401.             v->mv_f[0][s->block_index[k] + v->blocks_off] = f;

  2402.             v->mv_f[1][s->block_index[k] + v->blocks_off] = f;

  2403.         }

  2404.         return;

  2405.     }

  2406.     if (v->bmvtype == BMV_TYPE_INTERPOLATED) {

  2407.         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);

  2408.         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);

  2409.         return;

  2410.     }

  2411.     if (dir) { // backward

  2412.         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);

  2413.         if (n == 3 || mv1) {

  2414.             vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0],   1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  2415.         }

  2416.     } else { // forward

  2417.         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);

  2418.         if (n == 3 || mv1) {

  2419.             vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1],   1, v->range_x, v->range_y, v->mb_type[0], 0, 1);

  2420.         }

  2421.     }

  2422. }

  2423. 

  2424. /** Get predicted DC value for I-frames only

  2425.  * prediction dir: left=0, top=1

  2426.  * @param s MpegEncContext

  2427.  * @param overlap flag indicating that overlap filtering is used

  2428.  * @param pq integer part of picture quantizer

  2429.  * @param[in] n block index in the current MB

  2430.  * @param dc_val_ptr Pointer to DC predictor

  2431.  * @param dir_ptr Prediction direction for use in AC prediction

  2432.  */

  2433. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2434.                                 int16_t **dc_val_ptr, int *dir_ptr)

  2435. {

  2436.     int a, b, c, wrap, pred, scale;

  2437.     int16_t *dc_val;

  2438.     static const uint16_t dcpred[32] = {

  2439.         -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2440.              114,  102,   93,   85,   79,   73,   68,   64,

  2441.               60,   57,   54,   51,   49,   47,   45,   43,

  2442.               41,   39,   38,   37,   35,   34,   33

  2443.     };

  2444. 

  2445.     /* find prediction - wmv3_dc_scale always used here in fact */

  2446.     if (n < 4) scale = s->y_dc_scale;

  2447.     else       scale = s->c_dc_scale;

  2448. 

  2449.     wrap   = s->block_wrap[n];

  2450.     dc_val = s->dc_val[0] + s->block_index[n];

  2451. 

  2452.     /* B A

  2453.      * C X

  2454.      */

  2455.     c = dc_val[ - 1];

  2456.     b = dc_val[ - 1 - wrap];

  2457.     a = dc_val[ - wrap];

  2458. 

  2459.     if (pq < 9 || !overlap) {

  2460.         /* Set outer values */

  2461.         if (s->first_slice_line && (n != 2 && n != 3))

  2462.             b = a = dcpred[scale];

  2463.         if (s->mb_x == 0 && (n != 1 && n != 3))

  2464.             b = c = dcpred[scale];

  2465.     } else {

  2466.         /* Set outer values */

  2467.         if (s->first_slice_line && (n != 2 && n != 3))

  2468.             b = a = 0;

  2469.         if (s->mb_x == 0 && (n != 1 && n != 3))

  2470.             b = c = 0;

  2471.     }

  2472. 

  2473.     if (abs(a - b) <= abs(b - c)) {

  2474.         pred     = c;

  2475.         *dir_ptr = 1; // left

  2476.     } else {

  2477.         pred     = a;

  2478.         *dir_ptr = 0; // top

  2479.     }

  2480. 

  2481.     /* update predictor */

  2482.     *dc_val_ptr = &dc_val[0];

  2483.     return pred;

  2484. }

  2485. 

  2486. 

  2487. /** Get predicted DC value

  2488.  * prediction dir: left=0, top=1

  2489.  * @param s MpegEncContext

  2490.  * @param overlap flag indicating that overlap filtering is used

  2491.  * @param pq integer part of picture quantizer

  2492.  * @param[in] n block index in the current MB

  2493.  * @param a_avail flag indicating top block availability

  2494.  * @param c_avail flag indicating left block availability

  2495.  * @param dc_val_ptr Pointer to DC predictor

  2496.  * @param dir_ptr Prediction direction for use in AC prediction

  2497.  */

  2498. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2499.                               int a_avail, int c_avail,

  2500.                               int16_t **dc_val_ptr, int *dir_ptr)

  2501. {

  2502.     int a, b, c, wrap, pred;

  2503.     int16_t *dc_val;

  2504.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2505.     int q1, q2 = 0;

  2506. 

  2507.     wrap = s->block_wrap[n];

  2508.     dc_val = s->dc_val[0] + s->block_index[n];

  2509. 

  2510.     /* B A

  2511.      * C X

  2512.      */

  2513.     c = dc_val[ - 1];

  2514.     b = dc_val[ - 1 - wrap];

  2515.     a = dc_val[ - wrap];

  2516.     /* scale predictors if needed */

  2517.     q1 = s->current_picture.f.qscale_table[mb_pos];

  2518.     if (c_avail && (n != 1 && n != 3)) {

  2519.         q2 = s->current_picture.f.qscale_table[mb_pos - 1];

  2520.         if (q2 && q2 != q1)

  2521.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2522.     }

  2523.     if (a_avail && (n != 2 && n != 3)) {

  2524.         q2 = s->current_picture.f.qscale_table[mb_pos - s->mb_stride];

  2525.         if (q2 && q2 != q1)

  2526.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2527.     }

  2528.     if (a_avail && c_avail && (n != 3)) {

  2529.         int off = mb_pos;

  2530.         if (n != 1)

  2531.             off--;

  2532.         if (n != 2)

  2533.             off -= s->mb_stride;

  2534.         q2 = s->current_picture.f.qscale_table[off];

  2535.         if (q2 && q2 != q1)

  2536.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2537.     }

  2538. 

  2539.     if (a_avail && c_avail) {

  2540.         if (abs(a - b) <= abs(b - c)) {

  2541.             pred     = c;

  2542.             *dir_ptr = 1; // left

  2543.         } else {

  2544.             pred     = a;

  2545.             *dir_ptr = 0; // top

  2546.         }

  2547.     } else if (a_avail) {

  2548.         pred     = a;

  2549.         *dir_ptr = 0; // top

  2550.     } else if (c_avail) {

  2551.         pred     = c;

  2552.         *dir_ptr = 1; // left

  2553.     } else {

  2554.         pred     = 0;

  2555.         *dir_ptr = 1; // left

  2556.     }

  2557. 

  2558.     /* update predictor */

  2559.     *dc_val_ptr = &dc_val[0];

  2560.     return pred;

  2561. }

  2562. 

  2563. /** @} */ // Block group

  2564. 

  2565. /**

  2566.  * @name VC1 Macroblock-level functions in Simple/Main Profiles

  2567.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2568.  * @{

  2569.  */

  2570. 

  2571. static inline int vc1_coded_block_pred(MpegEncContext * s, int n,

  2572.                                        uint8_t **coded_block_ptr)

  2573. {

  2574.     int xy, wrap, pred, a, b, c;

  2575. 

  2576.     xy   = s->block_index[n];

  2577.     wrap = s->b8_stride;

  2578. 

  2579.     /* B C

  2580.      * A X

  2581.      */

  2582.     a = s->coded_block[xy - 1       ];

  2583.     b = s->coded_block[xy - 1 - wrap];

  2584.     c = s->coded_block[xy     - wrap];

  2585. 

  2586.     if (b == c) {

  2587.         pred = a;

  2588.     } else {

  2589.         pred = c;

  2590.     }

  2591. 

  2592.     /* store value */

  2593.     *coded_block_ptr = &s->coded_block[xy];

  2594. 

  2595.     return pred;

  2596. }

  2597. 

  2598. /**

  2599.  * Decode one AC coefficient

  2600.  * @param v The VC1 context

  2601.  * @param last Last coefficient

  2602.  * @param skip How much zero coefficients to skip

  2603.  * @param value Decoded AC coefficient value

  2604.  * @param codingset set of VLC to decode data

  2605.  * @see 8.1.3.4

  2606.  */

  2607. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,

  2608.                                 int *value, int codingset)

  2609. {

  2610.     GetBitContext *gb = &v->s.gb;

  2611.     int index, escape, run = 0, level = 0, lst = 0;

  2612. 

  2613.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2614.     if (index != vc1_ac_sizes[codingset] - 1) {

  2615.         run   = vc1_index_decode_table[codingset][index][0];

  2616.         level = vc1_index_decode_table[codingset][index][1];

  2617.         lst   = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;

  2618.         if (get_bits1(gb))

  2619.             level = -level;

  2620.     } else {

  2621.         escape = decode210(gb);

  2622.         if (escape != 2) {

  2623.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2624.             run   = vc1_index_decode_table[codingset][index][0];

  2625.             level = vc1_index_decode_table[codingset][index][1];

  2626.             lst   = index >= vc1_last_decode_table[codingset];

  2627.             if (escape == 0) {

  2628.                 if (lst)

  2629.                     level += vc1_last_delta_level_table[codingset][run];

  2630.                 else

  2631.                     level += vc1_delta_level_table[codingset][run];

  2632.             } else {

  2633.                 if (lst)

  2634.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2635.                 else

  2636.                     run += vc1_delta_run_table[codingset][level] + 1;

  2637.             }

  2638.             if (get_bits1(gb))

  2639.                 level = -level;

  2640.         } else {

  2641.             int sign;

  2642.             lst = get_bits1(gb);

  2643.             if (v->s.esc3_level_length == 0) {

  2644.                 if (v->pq < 8 || v->dquantfrm) { // table 59

  2645.                     v->s.esc3_level_length = get_bits(gb, 3);

  2646.                     if (!v->s.esc3_level_length)

  2647.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2648.                 } else { // table 60

  2649.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2650.                 }

  2651.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2652.             }

  2653.             run   = get_bits(gb, v->s.esc3_run_length);

  2654.             sign  = get_bits1(gb);

  2655.             level = get_bits(gb, v->s.esc3_level_length);

  2656.             if (sign)

  2657.                 level = -level;

  2658.         }

  2659.     }

  2660. 

  2661.     *last  = lst;

  2662.     *skip  = run;

  2663.     *value = level;

  2664. }

  2665. 

  2666. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2667.  * @param v VC1Context

  2668.  * @param block block to decode

  2669.  * @param[in] n subblock index

  2670.  * @param coded are AC coeffs present or not

  2671.  * @param codingset set of VLC to decode data

  2672.  */

  2673. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n,

  2674.                               int coded, int codingset)

  2675. {

  2676.     GetBitContext *gb = &v->s.gb;

  2677.     MpegEncContext *s = &v->s;

  2678.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2679.     int i;

  2680.     int16_t *dc_val;

  2681.     int16_t *ac_val, *ac_val2;

  2682.     int dcdiff;

  2683. 

  2684.     /* Get DC differential */

  2685.     if (n < 4) {

  2686.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2687.     } else {

  2688.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2689.     }

  2690.     if (dcdiff < 0) {

  2691.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2692.         return -1;

  2693.     }

  2694.     if (dcdiff) {

  2695.         if (dcdiff == 119 /* ESC index value */) {

  2696.             /* TODO: Optimize */

  2697.             if (v->pq == 1)      dcdiff = get_bits(gb, 10);

  2698.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2699.             else                 dcdiff = get_bits(gb, 8);

  2700.         } else {

  2701.             if (v->pq == 1)

  2702.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  2703.             else if (v->pq == 2)

  2704.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  2705.         }

  2706.         if (get_bits1(gb))

  2707.             dcdiff = -dcdiff;

  2708.     }

  2709. 

  2710.     /* Prediction */

  2711.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2712.     *dc_val = dcdiff;

  2713. 

  2714.     /* Store the quantized DC coeff, used for prediction */

  2715.     if (n < 4) {

  2716.         block[0] = dcdiff * s->y_dc_scale;

  2717.     } else {

  2718.         block[0] = dcdiff * s->c_dc_scale;

  2719.     }

  2720.     /* Skip ? */

  2721.     if (!coded) {

  2722.         goto not_coded;

  2723.     }

  2724. 

  2725.     // AC Decoding

  2726.     i = 1;

  2727. 

  2728.     {

  2729.         int last = 0, skip, value;

  2730.         const uint8_t *zz_table;

  2731.         int scale;

  2732.         int k;

  2733. 

  2734.         scale = v->pq * 2 + v->halfpq;

  2735. 

  2736.         if (v->s.ac_pred) {

  2737.             if (!dc_pred_dir)

  2738.                 zz_table = v->zz_8x8[2];

  2739.             else

  2740.                 zz_table = v->zz_8x8[3];

  2741.         } else

  2742.             zz_table = v->zz_8x8[1];

  2743. 

  2744.         ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2745.         ac_val2 = ac_val;

  2746.         if (dc_pred_dir) // left

  2747.             ac_val -= 16;

  2748.         else // top

  2749.             ac_val -= 16 * s->block_wrap[n];

  2750. 

  2751.         while (!last) {

  2752.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2753.             i += skip;

  2754.             if (i > 63)

  2755.                 break;

  2756.             block[zz_table[i++]] = value;

  2757.         }

  2758. 

  2759.         /* apply AC prediction if needed */

  2760.         if (s->ac_pred) {

  2761.             if (dc_pred_dir) { // left

  2762.                 for (k = 1; k < 8; k++)

  2763.                     block[k << v->left_blk_sh] += ac_val[k];

  2764.             } else { // top

  2765.                 for (k = 1; k < 8; k++)

  2766.                     block[k << v->top_blk_sh] += ac_val[k + 8];

  2767.             }

  2768.         }

  2769.         /* save AC coeffs for further prediction */

  2770.         for (k = 1; k < 8; k++) {

  2771.             ac_val2[k]     = block[k << v->left_blk_sh];

  2772.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  2773.         }

  2774. 

  2775.         /* scale AC coeffs */

  2776.         for (k = 1; k < 64; k++)

  2777.             if (block[k]) {

  2778.                 block[k] *= scale;

  2779.                 if (!v->pquantizer)

  2780.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2781.             }

  2782. 

  2783.         if (s->ac_pred) i = 63;

  2784.     }

  2785. 

  2786. not_coded:

  2787.     if (!coded) {

  2788.         int k, scale;

  2789.         ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2790.         ac_val2 = ac_val;

  2791. 

  2792.         i = 0;

  2793.         scale = v->pq * 2 + v->halfpq;

  2794.         memset(ac_val2, 0, 16 * 2);

  2795.         if (dc_pred_dir) { // left

  2796.             ac_val -= 16;

  2797.             if (s->ac_pred)

  2798.                 memcpy(ac_val2, ac_val, 8 * 2);

  2799.         } else { // top

  2800.             ac_val -= 16 * s->block_wrap[n];

  2801.             if (s->ac_pred)

  2802.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2803.         }

  2804. 

  2805.         /* apply AC prediction if needed */

  2806.         if (s->ac_pred) {

  2807.             if (dc_pred_dir) { //left

  2808.                 for (k = 1; k < 8; k++) {

  2809.                     block[k << v->left_blk_sh] = ac_val[k] * scale;

  2810.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  2811.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -v->pq : v->pq;

  2812.                 }

  2813.             } else { // top

  2814.                 for (k = 1; k < 8; k++) {

  2815.                     block[k << v->top_blk_sh] = ac_val[k + 8] * scale;

  2816.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  2817.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -v->pq : v->pq;

  2818.                 }

  2819.             }

  2820.             i = 63;

  2821.         }

  2822.     }

  2823.     s->block_last_index[n] = i;

  2824. 

  2825.     return 0;

  2826. }

  2827. 

  2828. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2829.  * @param v VC1Context

  2830.  * @param block block to decode

  2831.  * @param[in] n subblock number

  2832.  * @param coded are AC coeffs present or not

  2833.  * @param codingset set of VLC to decode data

  2834.  * @param mquant quantizer value for this macroblock

  2835.  */

  2836. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n,

  2837.                                   int coded, int codingset, int mquant)

  2838. {

  2839.     GetBitContext *gb = &v->s.gb;

  2840.     MpegEncContext *s = &v->s;

  2841.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2842.     int i;

  2843.     int16_t *dc_val;

  2844.     int16_t *ac_val, *ac_val2;

  2845.     int dcdiff;

  2846.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2847.     int use_pred = s->ac_pred;

  2848.     int scale;

  2849.     int q1, q2 = 0;

  2850.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2851. 

  2852.     /* Get DC differential */

  2853.     if (n < 4) {

  2854.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2855.     } else {

  2856.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2857.     }

  2858.     if (dcdiff < 0) {

  2859.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2860.         return -1;

  2861.     }

  2862.     if (dcdiff) {

  2863.         if (dcdiff == 119 /* ESC index value */) {

  2864.             /* TODO: Optimize */

  2865.             if (mquant == 1)      dcdiff = get_bits(gb, 10);

  2866.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2867.             else                  dcdiff = get_bits(gb, 8);

  2868.         } else {

  2869.             if (mquant == 1)

  2870.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  2871.             else if (mquant == 2)

  2872.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  2873.         }

  2874.         if (get_bits1(gb))

  2875.             dcdiff = -dcdiff;

  2876.     }

  2877. 

  2878.     /* Prediction */

  2879.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2880.     *dc_val = dcdiff;

  2881. 

  2882.     /* Store the quantized DC coeff, used for prediction */

  2883.     if (n < 4) {

  2884.         block[0] = dcdiff * s->y_dc_scale;

  2885.     } else {

  2886.         block[0] = dcdiff * s->c_dc_scale;

  2887.     }

  2888. 

  2889.     //AC Decoding

  2890.     i = 1;

  2891. 

  2892.     /* check if AC is needed at all */

  2893.     if (!a_avail && !c_avail)

  2894.         use_pred = 0;

  2895.     ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;

  2896.     ac_val2 = ac_val;

  2897. 

  2898.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2899. 

  2900.     if (dc_pred_dir) // left

  2901.         ac_val -= 16;

  2902.     else // top

  2903.         ac_val -= 16 * s->block_wrap[n];

  2904. 

  2905.     q1 = s->current_picture.f.qscale_table[mb_pos];

  2906.     if ( dc_pred_dir && c_avail && mb_pos)

  2907.         q2 = s->current_picture.f.qscale_table[mb_pos - 1];

  2908.     if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)

  2909.         q2 = s->current_picture.f.qscale_table[mb_pos - s->mb_stride];

  2910.     if ( dc_pred_dir && n == 1)

  2911.         q2 = q1;

  2912.     if (!dc_pred_dir && n == 2)

  2913.         q2 = q1;

  2914.     if (n == 3)

  2915.         q2 = q1;

  2916. 

  2917.     if (coded) {

  2918.         int last = 0, skip, value;

  2919.         const uint8_t *zz_table;

  2920.         int k;

  2921. 

  2922.         if (v->s.ac_pred) {

  2923.             if (!use_pred && v->fcm == 1) {

  2924.                 zz_table = v->zzi_8x8;

  2925.             } else {

  2926.                 if (!dc_pred_dir) // top

  2927.                     zz_table = v->zz_8x8[2];

  2928.                 else // left

  2929.                     zz_table = v->zz_8x8[3];

  2930.             }

  2931.         } else {

  2932.             if (v->fcm != 1)

  2933.                 zz_table = v->zz_8x8[1];

  2934.             else

  2935.                 zz_table = v->zzi_8x8;

  2936.         }

  2937. 

  2938.         while (!last) {

  2939.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2940.             i += skip;

  2941.             if (i > 63)

  2942.                 break;

  2943.             block[zz_table[i++]] = value;

  2944.         }

  2945. 

  2946.         /* apply AC prediction if needed */

  2947.         if (use_pred) {

  2948.             /* scale predictors if needed*/

  2949.             if (q2 && q1 != q2) {

  2950.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2951.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2952. 

  2953.                 if (dc_pred_dir) { // left

  2954.                     for (k = 1; k < 8; k++)

  2955.                         block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2956.                 } else { // top

  2957.                     for (k = 1; k < 8; k++)

  2958.                         block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2959.                 }

  2960.             } else {

  2961.                 if (dc_pred_dir) { //left

  2962.                     for (k = 1; k < 8; k++)

  2963.                         block[k << v->left_blk_sh] += ac_val[k];

  2964.                 } else { //top

  2965.                     for (k = 1; k < 8; k++)

  2966.                         block[k << v->top_blk_sh] += ac_val[k + 8];

  2967.                 }

  2968.             }

  2969.         }

  2970.         /* save AC coeffs for further prediction */

  2971.         for (k = 1; k < 8; k++) {

  2972.             ac_val2[k    ] = block[k << v->left_blk_sh];

  2973.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  2974.         }

  2975. 

  2976.         /* scale AC coeffs */

  2977.         for (k = 1; k < 64; k++)

  2978.             if (block[k]) {

  2979.                 block[k] *= scale;

  2980.                 if (!v->pquantizer)

  2981.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2982.             }

  2983. 

  2984.         if (use_pred) i = 63;

  2985.     } else { // no AC coeffs

  2986.         int k;

  2987. 

  2988.         memset(ac_val2, 0, 16 * 2);

  2989.         if (dc_pred_dir) { // left

  2990.             if (use_pred) {

  2991.                 memcpy(ac_val2, ac_val, 8 * 2);

  2992.                 if (q2 && q1 != q2) {

  2993.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2994.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2995.                     for (k = 1; k < 8; k++)

  2996.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2997.                 }

  2998.             }

  2999.         } else { // top

  3000.             if (use_pred) {

  3001.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  3002.                 if (q2 && q1 != q2) {

  3003.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3004.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3005.                     for (k = 1; k < 8; k++)

  3006.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3007.                 }

  3008.             }

  3009.         }

  3010. 

  3011.         /* apply AC prediction if needed */

  3012.         if (use_pred) {

  3013.             if (dc_pred_dir) { // left

  3014.                 for (k = 1; k < 8; k++) {

  3015.                     block[k << v->left_blk_sh] = ac_val2[k] * scale;

  3016.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  3017.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;

  3018.                 }

  3019.             } else { // top

  3020.                 for (k = 1; k < 8; k++) {

  3021.                     block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;

  3022.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  3023.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;

  3024.                 }

  3025.             }

  3026.             i = 63;

  3027.         }

  3028.     }

  3029.     s->block_last_index[n] = i;

  3030. 

  3031.     return 0;

  3032. }

  3033. 

  3034. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  3035.  * @param v VC1Context

  3036.  * @param block block to decode

  3037.  * @param[in] n subblock index

  3038.  * @param coded are AC coeffs present or not

  3039.  * @param mquant block quantizer

  3040.  * @param codingset set of VLC to decode data

  3041.  */

  3042. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n,

  3043.                                   int coded, int mquant, int codingset)

  3044. {

  3045.     GetBitContext *gb = &v->s.gb;

  3046.     MpegEncContext *s = &v->s;

  3047.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  3048.     int i;

  3049.     int16_t *dc_val;

  3050.     int16_t *ac_val, *ac_val2;

  3051.     int dcdiff;

  3052.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3053.     int a_avail = v->a_avail, c_avail = v->c_avail;

  3054.     int use_pred = s->ac_pred;

  3055.     int scale;

  3056.     int q1, q2 = 0;

  3057. 

  3058.     s->dsp.clear_block(block);

  3059. 

  3060.     /* XXX: Guard against dumb values of mquant */

  3061.     mquant = (mquant < 1) ? 0 : ((mquant > 31) ? 31 : mquant);

  3062. 

  3063.     /* Set DC scale - y and c use the same */

  3064.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  3065.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  3066. 

  3067.     /* Get DC differential */

  3068.     if (n < 4) {

  3069.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  3070.     } else {

  3071.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  3072.     }

  3073.     if (dcdiff < 0) {

  3074.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  3075.         return -1;

  3076.     }

  3077.     if (dcdiff) {

  3078.         if (dcdiff == 119 /* ESC index value */) {

  3079.             /* TODO: Optimize */

  3080.             if (mquant == 1)      dcdiff = get_bits(gb, 10);

  3081.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  3082.             else                  dcdiff = get_bits(gb, 8);

  3083.         } else {

  3084.             if (mquant == 1)

  3085.                 dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;

  3086.             else if (mquant == 2)

  3087.                 dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;

  3088.         }

  3089.         if (get_bits1(gb))

  3090.             dcdiff = -dcdiff;

  3091.     }

  3092. 

  3093.     /* Prediction */

  3094.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  3095.     *dc_val = dcdiff;

  3096. 

  3097.     /* Store the quantized DC coeff, used for prediction */

  3098. 

  3099.     if (n < 4) {

  3100.         block[0] = dcdiff * s->y_dc_scale;

  3101.     } else {

  3102.         block[0] = dcdiff * s->c_dc_scale;

  3103.     }

  3104. 

  3105.     //AC Decoding

  3106.     i = 1;

  3107. 

  3108.     /* check if AC is needed at all and adjust direction if needed */

  3109.     if (!a_avail) dc_pred_dir = 1;

  3110.     if (!c_avail) dc_pred_dir = 0;

  3111.     if (!a_avail && !c_avail) use_pred = 0;

  3112.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  3113.     ac_val2 = ac_val;

  3114. 

  3115.     scale = mquant * 2 + v->halfpq;

  3116. 

  3117.     if (dc_pred_dir) //left

  3118.         ac_val -= 16;

  3119.     else //top

  3120.         ac_val -= 16 * s->block_wrap[n];

  3121. 

  3122.     q1 = s->current_picture.f.qscale_table[mb_pos];

  3123.     if (dc_pred_dir && c_avail && mb_pos)

  3124.         q2 = s->current_picture.f.qscale_table[mb_pos - 1];

  3125.     if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)

  3126.         q2 = s->current_picture.f.qscale_table[mb_pos - s->mb_stride];

  3127.     if ( dc_pred_dir && n == 1)

  3128.         q2 = q1;

  3129.     if (!dc_pred_dir && n == 2)

  3130.         q2 = q1;

  3131.     if (n == 3) q2 = q1;

  3132. 

  3133.     if (coded) {

  3134.         int last = 0, skip, value;

  3135.         int k;

  3136. 

  3137.         while (!last) {

  3138.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  3139.             i += skip;

  3140.             if (i > 63)

  3141.                 break;

  3142.             if (v->fcm == 0)

  3143.                 block[v->zz_8x8[0][i++]] = value;

  3144.             else {

  3145.                 if (use_pred && (v->fcm == 1)) {

  3146.                     if (!dc_pred_dir) // top

  3147.                         block[v->zz_8x8[2][i++]] = value;

  3148.                     else // left

  3149.                         block[v->zz_8x8[3][i++]] = value;

  3150.                 } else {

  3151.                     block[v->zzi_8x8[i++]] = value;

  3152.                 }

  3153.             }

  3154.         }

  3155. 

  3156.         /* apply AC prediction if needed */

  3157.         if (use_pred) {

  3158.             /* scale predictors if needed*/

  3159.             if (q2 && q1 != q2) {

  3160.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3161.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3162. 

  3163.                 if (dc_pred_dir) { // left

  3164.                     for (k = 1; k < 8; k++)

  3165.                         block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3166.                 } else { //top

  3167.                     for (k = 1; k < 8; k++)

  3168.                         block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3169.                 }

  3170.             } else {

  3171.                 if (dc_pred_dir) { // left

  3172.                     for (k = 1; k < 8; k++)

  3173.                         block[k << v->left_blk_sh] += ac_val[k];

  3174.                 } else { // top

  3175.                     for (k = 1; k < 8; k++)

  3176.                         block[k << v->top_blk_sh] += ac_val[k + 8];

  3177.                 }

  3178.             }

  3179.         }

  3180.         /* save AC coeffs for further prediction */

  3181.         for (k = 1; k < 8; k++) {

  3182.             ac_val2[k    ] = block[k << v->left_blk_sh];

  3183.             ac_val2[k + 8] = block[k << v->top_blk_sh];

  3184.         }

  3185. 

  3186.         /* scale AC coeffs */

  3187.         for (k = 1; k < 64; k++)

  3188.             if (block[k]) {

  3189.                 block[k] *= scale;

  3190.                 if (!v->pquantizer)

  3191.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  3192.             }

  3193. 

  3194.         if (use_pred) i = 63;

  3195.     } else { // no AC coeffs

  3196.         int k;

  3197. 

  3198.         memset(ac_val2, 0, 16 * 2);

  3199.         if (dc_pred_dir) { // left

  3200.             if (use_pred) {

  3201.                 memcpy(ac_val2, ac_val, 8 * 2);

  3202.                 if (q2 && q1 != q2) {

  3203.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3204.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3205.                     for (k = 1; k < 8; k++)

  3206.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3207.                 }

  3208.             }

  3209.         } else { // top

  3210.             if (use_pred) {

  3211.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  3212.                 if (q2 && q1 != q2) {

  3213.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3214.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3215.                     for (k = 1; k < 8; k++)

  3216.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3217.                 }

  3218.             }

  3219.         }

  3220. 

  3221.         /* apply AC prediction if needed */

  3222.         if (use_pred) {

  3223.             if (dc_pred_dir) { // left

  3224.                 for (k = 1; k < 8; k++) {

  3225.                     block[k << v->left_blk_sh] = ac_val2[k] * scale;

  3226.                     if (!v->pquantizer && block[k << v->left_blk_sh])

  3227.                         block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;

  3228.                 }

  3229.             } else { // top

  3230.                 for (k = 1; k < 8; k++) {

  3231.                     block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;

  3232.                     if (!v->pquantizer && block[k << v->top_blk_sh])

  3233.                         block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;

  3234.                 }

  3235.             }

  3236.             i = 63;

  3237.         }

  3238.     }

  3239.     s->block_last_index[n] = i;

  3240. 

  3241.     return 0;

  3242. }

  3243. 

  3244. /** Decode P block

  3245.  */

  3246. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n,

  3247.                               int mquant, int ttmb, int first_block,

  3248.                               uint8_t *dst, int linesize, int skip_block,

  3249.                               int *ttmb_out)

  3250. {

  3251.     MpegEncContext *s = &v->s;

  3252.     GetBitContext *gb = &s->gb;

  3253.     int i, j;

  3254.     int subblkpat = 0;

  3255.     int scale, off, idx, last, skip, value;

  3256.     int ttblk = ttmb & 7;

  3257.     int pat = 0;

  3258. 

  3259.     s->dsp.clear_block(block);

  3260. 

  3261.     if (ttmb == -1) {

  3262.         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)];

  3263.     }

  3264.     if (ttblk == TT_4X4) {

  3265.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  3266.     }

  3267.     if ((ttblk != TT_8X8 && ttblk != TT_4X4)

  3268.         && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))

  3269.             || (!v->res_rtm_flag && !first_block))) {

  3270.         subblkpat = decode012(gb);

  3271.         if (subblkpat)

  3272.             subblkpat ^= 3; // swap decoded pattern bits

  3273.         if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)

  3274.             ttblk = TT_8X4;

  3275.         if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)

  3276.             ttblk = TT_4X8;

  3277.     }

  3278.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  3279. 

  3280.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  3281.     if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  3282.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  3283.         ttblk     = TT_8X4;

  3284.     }

  3285.     if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  3286.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  3287.         ttblk     = TT_4X8;

  3288.     }

  3289.     switch (ttblk) {

  3290.     case TT_8X8:

  3291.         pat  = 0xF;

  3292.         i    = 0;

  3293.         last = 0;

  3294.         while (!last) {

  3295.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3296.             i += skip;

  3297.             if (i > 63)

  3298.                 break;

  3299.             if (!v->interlace)

  3300.                 idx = v->zz_8x8[0][i++];

  3301.             else

  3302.                 idx = v->zzi_8x8[i++];

  3303.             block[idx] = value * scale;

  3304.             if (!v->pquantizer)

  3305.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3306.         }

  3307.         if (!skip_block) {

  3308.             if (i == 1)

  3309.                 v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);

  3310.             else {

  3311.                 v->vc1dsp.vc1_inv_trans_8x8(block);

  3312.                 s->dsp.add_pixels_clamped(block, dst, linesize);

  3313.             }

  3314.         }

  3315.         break;

  3316.     case TT_4X4:

  3317.         pat = ~subblkpat & 0xF;

  3318.         for (j = 0; j < 4; j++) {

  3319.             last = subblkpat & (1 << (3 - j));

  3320.             i    = 0;

  3321.             off  = (j & 1) * 4 + (j & 2) * 16;

  3322.             while (!last) {

  3323.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3324.                 i += skip;

  3325.                 if (i > 15)

  3326.                     break;

  3327.                 if (!v->interlace)

  3328.                     idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3329.                 else

  3330.                     idx = ff_vc1_adv_interlaced_4x4_zz[i++];

  3331.                 block[idx + off] = value * scale;

  3332.                 if (!v->pquantizer)

  3333.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3334.             }

  3335.             if (!(subblkpat & (1 << (3 - j))) && !skip_block) {

  3336.                 if (i == 1)

  3337.                     v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);

  3338.                 else

  3339.                     v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) *  2 * linesize, linesize, block + off);

  3340.             }

  3341.         }

  3342.         break;

  3343.     case TT_8X4:

  3344.         pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;

  3345.         for (j = 0; j < 2; j++) {

  3346.             last = subblkpat & (1 << (1 - j));

  3347.             i    = 0;

  3348.             off  = j * 32;

  3349.             while (!last) {

  3350.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3351.                 i += skip;

  3352.                 if (i > 31)

  3353.                     break;

  3354.                 if (!v->interlace)

  3355.                     idx = v->zz_8x4[i++] + off;

  3356.                 else

  3357.                     idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;

  3358.                 block[idx] = value * scale;

  3359.                 if (!v->pquantizer)

  3360.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3361.             }

  3362.             if (!(subblkpat & (1 << (1 - j))) && !skip_block) {

  3363.                 if (i == 1)

  3364.                     v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);

  3365.                 else

  3366.                     v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);

  3367.             }

  3368.         }

  3369.         break;

  3370.     case TT_4X8:

  3371.         pat = ~(subblkpat * 5) & 0xF;

  3372.         for (j = 0; j < 2; j++) {

  3373.             last = subblkpat & (1 << (1 - j));

  3374.             i    = 0;

  3375.             off  = j * 4;

  3376.             while (!last) {

  3377.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3378.                 i += skip;

  3379.                 if (i > 31)

  3380.                     break;

  3381.                 if (!v->interlace)

  3382.                     idx = v->zz_4x8[i++] + off;

  3383.                 else

  3384.                     idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;

  3385.                 block[idx] = value * scale;

  3386.                 if (!v->pquantizer)

  3387.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3388.             }

  3389.             if (!(subblkpat & (1 << (1 - j))) && !skip_block) {

  3390.                 if (i == 1)

  3391.                     v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);

  3392.                 else

  3393.                     v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3394.             }

  3395.         }

  3396.         break;

  3397.     }

  3398.     if (ttmb_out)

  3399.         *ttmb_out |= ttblk << (n * 4);

  3400.     return pat;

  3401. }

  3402. 

  3403. /** @} */ // Macroblock group

  3404. 

  3405. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3406. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3407. 

  3408. static av_always_inline void vc1_apply_p_v_loop_filter(VC1Context *v, int block_num)

  3409. {

  3410.     MpegEncContext *s  = &v->s;

  3411.     int mb_cbp         = v->cbp[s->mb_x - s->mb_stride],

  3412.         block_cbp      = mb_cbp      >> (block_num * 4), bottom_cbp,

  3413.         mb_is_intra    = v->is_intra[s->mb_x - s->mb_stride],

  3414.         block_is_intra = mb_is_intra >> (block_num * 4), bottom_is_intra;

  3415.     int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;

  3416.     uint8_t *dst;

  3417. 

  3418.     if (block_num > 3) {

  3419.         dst      = s->dest[block_num - 3];

  3420.     } else {

  3421.         dst      = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 8) * linesize;

  3422.     }

  3423.     if (s->mb_y != s->end_mb_y || block_num < 2) {

  3424.         int16_t (*mv)[2];

  3425.         int mv_stride;

  3426. 

  3427.         if (block_num > 3) {

  3428.             bottom_cbp      = v->cbp[s->mb_x]      >> (block_num * 4);

  3429.             bottom_is_intra = v->is_intra[s->mb_x] >> (block_num * 4);

  3430.             mv              = &v->luma_mv[s->mb_x - s->mb_stride];

  3431.             mv_stride       = s->mb_stride;

  3432.         } else {

  3433.             bottom_cbp      = (block_num < 2) ? (mb_cbp               >> ((block_num + 2) * 4))

  3434.                                               : (v->cbp[s->mb_x]      >> ((block_num - 2) * 4));

  3435.             bottom_is_intra = (block_num < 2) ? (mb_is_intra          >> ((block_num + 2) * 4))

  3436.                                               : (v->is_intra[s->mb_x] >> ((block_num - 2) * 4));

  3437.             mv_stride       = s->b8_stride;

  3438.             mv              = &s->current_picture.f.motion_val[0][s->block_index[block_num] - 2 * mv_stride];

  3439.         }

  3440. 

  3441.         if (bottom_is_intra & 1 || block_is_intra & 1 ||

  3442.             mv[0][0] != mv[mv_stride][0] || mv[0][1] != mv[mv_stride][1]) {

  3443.             v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3444.         } else {

  3445.             idx = ((bottom_cbp >> 2) | block_cbp) & 3;

  3446.             if (idx == 3) {

  3447.                 v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3448.             } else if (idx) {

  3449.                 if (idx == 1)

  3450.                     v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);

  3451.                 else

  3452.                     v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);

  3453.             }

  3454.         }

  3455.     }

  3456. 

  3457.     dst -= 4 * linesize;

  3458.     ttblk = (v->ttblk[s->mb_x - s->mb_stride] >> (block_num * 4)) & 0xF;

  3459.     if (ttblk == TT_4X4 || ttblk == TT_8X4) {

  3460.         idx = (block_cbp | (block_cbp >> 2)) & 3;

  3461.         if (idx == 3) {

  3462.             v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  3463.         } else if (idx) {

  3464.             if (idx == 1)

  3465.                 v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);

  3466.             else

  3467.                 v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);

  3468.         }

  3469.     }

  3470. }

  3471. 

  3472. static av_always_inline void vc1_apply_p_h_loop_filter(VC1Context *v, int block_num)

  3473. {

  3474.     MpegEncContext *s  = &v->s;

  3475.     int mb_cbp         = v->cbp[s->mb_x - 1 - s->mb_stride],

  3476.         block_cbp      = mb_cbp      >> (block_num * 4), right_cbp,

  3477.         mb_is_intra    = v->is_intra[s->mb_x - 1 - s->mb_stride],

  3478.         block_is_intra = mb_is_intra >> (block_num * 4), right_is_intra;

  3479.     int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;

  3480.     uint8_t *dst;

  3481. 

  3482.     if (block_num > 3) {

  3483.         dst = s->dest[block_num - 3] - 8 * linesize;

  3484.     } else {

  3485.         dst = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 16) * linesize - 8;

  3486.     }

  3487. 

  3488.     if (s->mb_x != s->mb_width || !(block_num & 5)) {

  3489.         int16_t (*mv)[2];

  3490. 

  3491.         if (block_num > 3) {

  3492.             right_cbp      = v->cbp[s->mb_x - s->mb_stride] >> (block_num * 4);

  3493.             right_is_intra = v->is_intra[s->mb_x - s->mb_stride] >> (block_num * 4);

  3494.             mv             = &v->luma_mv[s->mb_x - s->mb_stride - 1];

  3495.         } else {

  3496.             right_cbp      = (block_num & 1) ? (v->cbp[s->mb_x - s->mb_stride]      >> ((block_num - 1) * 4))

  3497.                                              : (mb_cbp                              >> ((block_num + 1) * 4));

  3498.             right_is_intra = (block_num & 1) ? (v->is_intra[s->mb_x - s->mb_stride] >> ((block_num - 1) * 4))

  3499.                                              : (mb_is_intra                         >> ((block_num + 1) * 4));

  3500.             mv             = &s->current_picture.f.motion_val[0][s->block_index[block_num] - s->b8_stride * 2 - 2];

  3501.         }

  3502.         if (block_is_intra & 1 || right_is_intra & 1 || mv[0][0] != mv[1][0] || mv[0][1] != mv[1][1]) {

  3503.             v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3504.         } else {

  3505.             idx = ((right_cbp >> 1) | block_cbp) & 5; // FIXME check

  3506.             if (idx == 5) {

  3507.                 v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3508.             } else if (idx) {

  3509.                 if (idx == 1)

  3510.                     v->vc1dsp.vc1_h_loop_filter4(dst + 4 * linesize, linesize, v->pq);

  3511.                 else

  3512.                     v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);

  3513.             }

  3514.         }

  3515.     }

  3516. 

  3517.     dst -= 4;

  3518.     ttblk = (v->ttblk[s->mb_x - s->mb_stride - 1] >> (block_num * 4)) & 0xf;

  3519.     if (ttblk == TT_4X4 || ttblk == TT_4X8) {

  3520.         idx = (block_cbp | (block_cbp >> 1)) & 5;

  3521.         if (idx == 5) {

  3522.             v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3523.         } else if (idx) {

  3524.             if (idx == 1)

  3525.                 v->vc1dsp.vc1_h_loop_filter4(dst + linesize * 4, linesize, v->pq);

  3526.             else

  3527.                 v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);

  3528.         }

  3529.     }

  3530. }

  3531. 

  3532. static void vc1_apply_p_loop_filter(VC1Context *v)

  3533. {

  3534.     MpegEncContext *s = &v->s;

  3535.     int i;

  3536. 

  3537.     for (i = 0; i < 6; i++) {

  3538.         vc1_apply_p_v_loop_filter(v, i);

  3539.     }

  3540. 

  3541.     /* V always preceedes H, therefore we run H one MB before V;

  3542.      * at the end of a row, we catch up to complete the row */

  3543.     if (s->mb_x) {

  3544.         for (i = 0; i < 6; i++) {

  3545.             vc1_apply_p_h_loop_filter(v, i);

  3546.         }

  3547.         if (s->mb_x == s->mb_width - 1) {

  3548.             s->mb_x++;

  3549.             ff_update_block_index(s);

  3550.             for (i = 0; i < 6; i++) {

  3551.                 vc1_apply_p_h_loop_filter(v, i);

  3552.             }

  3553.         }

  3554.     }

  3555. }

  3556. 

  3557. /** Decode one P-frame MB

  3558.  */

  3559. static int vc1_decode_p_mb(VC1Context *v)

  3560. {

  3561.     MpegEncContext *s = &v->s;

  3562.     GetBitContext *gb = &s->gb;

  3563.     int i, j;

  3564.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3565.     int cbp; /* cbp decoding stuff */

  3566.     int mqdiff, mquant; /* MB quantization */

  3567.     int ttmb = v->ttfrm; /* MB Transform type */

  3568. 

  3569.     int mb_has_coeffs = 1; /* last_flag */

  3570.     int dmv_x, dmv_y; /* Differential MV components */

  3571.     int index, index1; /* LUT indexes */

  3572.     int val, sign; /* temp values */

  3573.     int first_block = 1;

  3574.     int dst_idx, off;

  3575.     int skipped, fourmv;

  3576.     int block_cbp = 0, pat, block_tt = 0, block_intra = 0;

  3577. 

  3578.     mquant = v->pq; /* Loosy initialization */

  3579. 

  3580.     if (v->mv_type_is_raw)

  3581.         fourmv = get_bits1(gb);

  3582.     else

  3583.         fourmv = v->mv_type_mb_plane[mb_pos];

  3584.     if (v->skip_is_raw)

  3585.         skipped = get_bits1(gb);

  3586.     else

  3587.         skipped = v->s.mbskip_table[mb_pos];

  3588. 

  3589.     if (!fourmv) { /* 1MV mode */

  3590.         if (!skipped) {

  3591.             GET_MVDATA(dmv_x, dmv_y);

  3592. 

  3593.             if (s->mb_intra) {

  3594.                 s->current_picture.f.motion_val[1][s->block_index[0]][0] = 0;

  3595.                 s->current_picture.f.motion_val[1][s->block_index[0]][1] = 0;

  3596.             }

  3597.             s->current_picture.f.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3598.             vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3599. 

  3600.             /* FIXME Set DC val for inter block ? */

  3601.             if (s->mb_intra && !mb_has_coeffs) {

  3602.                 GET_MQUANT();

  3603.                 s->ac_pred = get_bits1(gb);

  3604.                 cbp        = 0;

  3605.             } else if (mb_has_coeffs) {

  3606.                 if (s->mb_intra)

  3607.                     s->ac_pred = get_bits1(gb);

  3608.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3609.                 GET_MQUANT();

  3610.             } else {

  3611.                 mquant = v->pq;

  3612.                 cbp    = 0;

  3613.             }

  3614.             s->current_picture.f.qscale_table[mb_pos] = mquant;

  3615. 

  3616.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3617.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3618.                                 VC1_TTMB_VLC_BITS, 2);

  3619.             if (!s->mb_intra) vc1_mc_1mv(v, 0);

  3620.             dst_idx = 0;

  3621.             for (i = 0; i < 6; i++) {

  3622.                 s->dc_val[0][s->block_index[i]] = 0;

  3623.                 dst_idx += i >> 2;

  3624.                 val = ((cbp >> (5 - i)) & 1);

  3625.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3626.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3627.                 if (s->mb_intra) {

  3628.                     /* check if prediction blocks A and C are available */

  3629.                     v->a_avail = v->c_avail = 0;

  3630.                     if (i == 2 || i == 3 || !s->first_slice_line)

  3631.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3632.                     if (i == 1 || i == 3 || s->mb_x)

  3633.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3634. 

  3635.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  3636.                                            (i & 4) ? v->codingset2 : v->codingset);

  3637.                     if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  3638.                         continue;

  3639.                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3640.                     if (v->rangeredfrm)

  3641.                         for (j = 0; j < 64; j++)

  3642.                             s->block[i][j] <<= 1;

  3643.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3644.                     if (v->pq >= 9 && v->overlap) {

  3645.                         if (v->c_avail)

  3646.                             v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3647.                         if (v->a_avail)

  3648.                             v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3649.                     }

  3650.                     block_cbp   |= 0xF << (i << 2);

  3651.                     block_intra |= 1 << i;

  3652.                 } else if (val) {

  3653.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,

  3654.                                              s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,

  3655.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);

  3656.                     block_cbp |= pat << (i << 2);

  3657.                     if (!v->ttmbf && ttmb < 8)

  3658.                         ttmb = -1;

  3659.                     first_block = 0;

  3660.                 }

  3661.             }

  3662.         } else { // skipped

  3663.             s->mb_intra = 0;

  3664.             for (i = 0; i < 6; i++) {

  3665.                 v->mb_type[0][s->block_index[i]] = 0;

  3666.                 s->dc_val[0][s->block_index[i]]  = 0;

  3667.             }

  3668.             s->current_picture.f.mb_type[mb_pos]      = MB_TYPE_SKIP;

  3669.             s->current_picture.f.qscale_table[mb_pos] = 0;

  3670.             vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3671.             vc1_mc_1mv(v, 0);

  3672.         }

  3673.     } else { // 4MV mode

  3674.         if (!skipped /* unskipped MB */) {

  3675.             int intra_count = 0, coded_inter = 0;

  3676.             int is_intra[6], is_coded[6];

  3677.             /* Get CBPCY */

  3678.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3679.             for (i = 0; i < 6; i++) {

  3680.                 val = ((cbp >> (5 - i)) & 1);

  3681.                 s->dc_val[0][s->block_index[i]] = 0;

  3682.                 s->mb_intra                     = 0;

  3683.                 if (i < 4) {

  3684.                     dmv_x = dmv_y = 0;

  3685.                     s->mb_intra   = 0;

  3686.                     mb_has_coeffs = 0;

  3687.                     if (val) {

  3688.                         GET_MVDATA(dmv_x, dmv_y);

  3689.                     }

  3690.                     vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3691.                     if (!s->mb_intra)

  3692.                         vc1_mc_4mv_luma(v, i, 0);

  3693.                     intra_count += s->mb_intra;

  3694.                     is_intra[i]  = s->mb_intra;

  3695.                     is_coded[i]  = mb_has_coeffs;

  3696.                 }

  3697.                 if (i & 4) {

  3698.                     is_intra[i] = (intra_count >= 3);

  3699.                     is_coded[i] = val;

  3700.                 }

  3701.                 if (i == 4)

  3702.                     vc1_mc_4mv_chroma(v, 0);

  3703.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3704.                 if (!coded_inter)

  3705.                     coded_inter = !is_intra[i] & is_coded[i];

  3706.             }

  3707.             // if there are no coded blocks then don't do anything more

  3708.             dst_idx = 0;

  3709.             if (!intra_count && !coded_inter)

  3710.                 goto end;

  3711.             GET_MQUANT();

  3712.             s->current_picture.f.qscale_table[mb_pos] = mquant;

  3713.             /* test if block is intra and has pred */

  3714.             {

  3715.                 int intrapred = 0;

  3716.                 for (i = 0; i < 6; i++)

  3717.                     if (is_intra[i]) {

  3718.                         if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3719.                             || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3720.                             intrapred = 1;

  3721.                             break;

  3722.                         }

  3723.                     }

  3724.                 if (intrapred)

  3725.                     s->ac_pred = get_bits1(gb);

  3726.                 else

  3727.                     s->ac_pred = 0;

  3728.             }

  3729.             if (!v->ttmbf && coded_inter)

  3730.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3731.             for (i = 0; i < 6; i++) {

  3732.                 dst_idx    += i >> 2;

  3733.                 off         = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3734.                 s->mb_intra = is_intra[i];

  3735.                 if (is_intra[i]) {

  3736.                     /* check if prediction blocks A and C are available */

  3737.                     v->a_avail = v->c_avail = 0;

  3738.                     if (i == 2 || i == 3 || !s->first_slice_line)

  3739.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3740.                     if (i == 1 || i == 3 || s->mb_x)

  3741.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3742. 

  3743.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant,

  3744.                                            (i & 4) ? v->codingset2 : v->codingset);

  3745.                     if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  3746.                         continue;

  3747.                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3748.                     if (v->rangeredfrm)

  3749.                         for (j = 0; j < 64; j++)

  3750.                             s->block[i][j] <<= 1;

  3751.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off,

  3752.                                                      (i & 4) ? s->uvlinesize : s->linesize);

  3753.                     if (v->pq >= 9 && v->overlap) {

  3754.                         if (v->c_avail)

  3755.                             v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3756.                         if (v->a_avail)

  3757.                             v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  3758.                     }

  3759.                     block_cbp   |= 0xF << (i << 2);

  3760.                     block_intra |= 1 << i;

  3761.                 } else if (is_coded[i]) {

  3762.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  3763.                                              first_block, s->dest[dst_idx] + off,

  3764.                                              (i & 4) ? s->uvlinesize : s->linesize,

  3765.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY),

  3766.                                              &block_tt);

  3767.                     block_cbp |= pat << (i << 2);

  3768.                     if (!v->ttmbf && ttmb < 8)

  3769.                         ttmb = -1;

  3770.                     first_block = 0;

  3771.                 }

  3772.             }

  3773.         } else { // skipped MB

  3774.             s->mb_intra                               = 0;

  3775.             s->current_picture.f.qscale_table[mb_pos] = 0;

  3776.             for (i = 0; i < 6; i++) {

  3777.                 v->mb_type[0][s->block_index[i]] = 0;

  3778.                 s->dc_val[0][s->block_index[i]]  = 0;

  3779.             }

  3780.             for (i = 0; i < 4; i++) {

  3781.                 vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);

  3782.                 vc1_mc_4mv_luma(v, i, 0);

  3783.             }

  3784.             vc1_mc_4mv_chroma(v, 0);

  3785.             s->current_picture.f.qscale_table[mb_pos] = 0;

  3786.         }

  3787.     }

  3788. end:

  3789.     v->cbp[s->mb_x]      = block_cbp;

  3790.     v->ttblk[s->mb_x]    = block_tt;

  3791.     v->is_intra[s->mb_x] = block_intra;

  3792. 

  3793.     return 0;

  3794. }

  3795. 

  3796. /* Decode one macroblock in an interlaced frame p picture */

  3797. 

  3798. static int vc1_decode_p_mb_intfr(VC1Context *v)

  3799. {

  3800.     MpegEncContext *s = &v->s;

  3801.     GetBitContext *gb = &s->gb;

  3802.     int i;

  3803.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3804.     int cbp = 0; /* cbp decoding stuff */

  3805.     int mqdiff, mquant; /* MB quantization */

  3806.     int ttmb = v->ttfrm; /* MB Transform type */

  3807. 

  3808.     int mb_has_coeffs = 1; /* last_flag */

  3809.     int dmv_x, dmv_y; /* Differential MV components */

  3810.     int val; /* temp value */

  3811.     int first_block = 1;

  3812.     int dst_idx, off;

  3813.     int skipped, fourmv = 0, twomv = 0;

  3814.     int block_cbp = 0, pat, block_tt = 0;

  3815.     int idx_mbmode = 0, mvbp;

  3816.     int stride_y, fieldtx;

  3817. 

  3818.     mquant = v->pq; /* Loosy initialization */

  3819. 

  3820.     if (v->skip_is_raw)

  3821.         skipped = get_bits1(gb);

  3822.     else

  3823.         skipped = v->s.mbskip_table[mb_pos];

  3824.     if (!skipped) {

  3825.         if (v->fourmvswitch)

  3826.             idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done

  3827.         else

  3828.             idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line

  3829.         switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {

  3830.         /* store the motion vector type in a flag (useful later) */

  3831.         case MV_PMODE_INTFR_4MV:

  3832.             fourmv = 1;

  3833.             v->blk_mv_type[s->block_index[0]] = 0;

  3834.             v->blk_mv_type[s->block_index[1]] = 0;

  3835.             v->blk_mv_type[s->block_index[2]] = 0;

  3836.             v->blk_mv_type[s->block_index[3]] = 0;

  3837.             break;

  3838.         case MV_PMODE_INTFR_4MV_FIELD:

  3839.             fourmv = 1;

  3840.             v->blk_mv_type[s->block_index[0]] = 1;

  3841.             v->blk_mv_type[s->block_index[1]] = 1;

  3842.             v->blk_mv_type[s->block_index[2]] = 1;

  3843.             v->blk_mv_type[s->block_index[3]] = 1;

  3844.             break;

  3845.         case MV_PMODE_INTFR_2MV_FIELD:

  3846.             twomv = 1;

  3847.             v->blk_mv_type[s->block_index[0]] = 1;

  3848.             v->blk_mv_type[s->block_index[1]] = 1;

  3849.             v->blk_mv_type[s->block_index[2]] = 1;

  3850.             v->blk_mv_type[s->block_index[3]] = 1;

  3851.             break;

  3852.         case MV_PMODE_INTFR_1MV:

  3853.             v->blk_mv_type[s->block_index[0]] = 0;

  3854.             v->blk_mv_type[s->block_index[1]] = 0;

  3855.             v->blk_mv_type[s->block_index[2]] = 0;

  3856.             v->blk_mv_type[s->block_index[3]] = 0;

  3857.             break;

  3858.         }

  3859.         if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB

  3860.             s->current_picture.f.motion_val[1][s->block_index[0]][0] = 0;

  3861.             s->current_picture.f.motion_val[1][s->block_index[0]][1] = 0;

  3862.             s->current_picture.f.mb_type[mb_pos]                     = MB_TYPE_INTRA;

  3863.             s->mb_intra = v->is_intra[s->mb_x] = 1;

  3864.             for (i = 0; i < 6; i++)

  3865.                 v->mb_type[0][s->block_index[i]] = 1;

  3866.             fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);

  3867.             mb_has_coeffs = get_bits1(gb);

  3868.             if (mb_has_coeffs)

  3869.                 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3870.             v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);

  3871.             GET_MQUANT();

  3872.             s->current_picture.f.qscale_table[mb_pos] = mquant;

  3873.             /* Set DC scale - y and c use the same (not sure if necessary here) */

  3874.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3875.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3876.             dst_idx = 0;

  3877.             for (i = 0; i < 6; i++) {

  3878.                 s->dc_val[0][s->block_index[i]] = 0;

  3879.                 dst_idx += i >> 2;

  3880.                 val = ((cbp >> (5 - i)) & 1);

  3881.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3882.                 v->a_avail = v->c_avail = 0;

  3883.                 if (i == 2 || i == 3 || !s->first_slice_line)

  3884.                     v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3885.                 if (i == 1 || i == 3 || s->mb_x)

  3886.                     v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3887. 

  3888.                 vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  3889.                                        (i & 4) ? v->codingset2 : v->codingset);

  3890.                 if ((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3891.                 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  3892.                 if (i < 4) {

  3893.                     stride_y = s->linesize << fieldtx;

  3894.                     off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;

  3895.                 } else {

  3896.                     stride_y = s->uvlinesize;

  3897.                     off = 0;

  3898.                 }

  3899.                 s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, stride_y);

  3900.                 //TODO: loop filter

  3901.             }

  3902. 

  3903.         } else { // inter MB

  3904.             mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];

  3905.             if (mb_has_coeffs)

  3906.                 cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3907.             if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {

  3908.                 v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);

  3909.             } else {

  3910.                 if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)

  3911.                     || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {

  3912.                     v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  3913.                 }

  3914.             }

  3915.             s->mb_intra = v->is_intra[s->mb_x] = 0;

  3916.             for (i = 0; i < 6; i++)

  3917.                 v->mb_type[0][s->block_index[i]] = 0;

  3918.             fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];

  3919.             /* for all motion vector read MVDATA and motion compensate each block */

  3920.             dst_idx = 0;

  3921.             if (fourmv) {

  3922.                 mvbp = v->fourmvbp;

  3923.                 for (i = 0; i < 6; i++) {

  3924.                     if (i < 4) {

  3925.                         dmv_x = dmv_y = 0;

  3926.                         val   = ((mvbp >> (3 - i)) & 1);

  3927.                         if (val) {

  3928.                             get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3929.                         }

  3930.                         vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3931.                         vc1_mc_4mv_luma(v, i, 0);

  3932.                     } else if (i == 4) {

  3933.                         vc1_mc_4mv_chroma4(v);

  3934.                     }

  3935.                 }

  3936.             } else if (twomv) {

  3937.                 mvbp  = v->twomvbp;

  3938.                 dmv_x = dmv_y = 0;

  3939.                 if (mvbp & 2) {

  3940.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3941.                 }

  3942.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0]);

  3943.                 vc1_mc_4mv_luma(v, 0, 0);

  3944.                 vc1_mc_4mv_luma(v, 1, 0);

  3945.                 dmv_x = dmv_y = 0;

  3946.                 if (mvbp & 1) {

  3947.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3948.                 }

  3949.                 vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0]);

  3950.                 vc1_mc_4mv_luma(v, 2, 0);

  3951.                 vc1_mc_4mv_luma(v, 3, 0);

  3952.                 vc1_mc_4mv_chroma4(v);

  3953.             } else {

  3954.                 mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];

  3955.                 if (mvbp) {

  3956.                     get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);

  3957.                 }

  3958.                 vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3959.                 vc1_mc_1mv(v, 0);

  3960.             }

  3961.             if (cbp)

  3962.                 GET_MQUANT();  // p. 227

  3963.             s->current_picture.f.qscale_table[mb_pos] = mquant;

  3964.             if (!v->ttmbf && cbp)

  3965.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3966.             for (i = 0; i < 6; i++) {

  3967.                 s->dc_val[0][s->block_index[i]] = 0;

  3968.                 dst_idx += i >> 2;

  3969.                 val = ((cbp >> (5 - i)) & 1);

  3970.                 if (!fieldtx)

  3971.                     off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3972.                 else

  3973.                     off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));

  3974.                 if (val) {

  3975.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  3976.                                              first_block, s->dest[dst_idx] + off,

  3977.                                              (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),

  3978.                                              (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);

  3979.                     block_cbp |= pat << (i << 2);

  3980.                     if (!v->ttmbf && ttmb < 8)

  3981.                         ttmb = -1;

  3982.                     first_block = 0;

  3983.                 }

  3984.             }

  3985.         }

  3986.     } else { // skipped

  3987.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  3988.         for (i = 0; i < 6; i++) {

  3989.             v->mb_type[0][s->block_index[i]] = 0;

  3990.             s->dc_val[0][s->block_index[i]] = 0;

  3991.         }

  3992.         s->current_picture.f.mb_type[mb_pos]      = MB_TYPE_SKIP;

  3993.         s->current_picture.f.qscale_table[mb_pos] = 0;

  3994.         v->blk_mv_type[s->block_index[0]] = 0;

  3995.         v->blk_mv_type[s->block_index[1]] = 0;

  3996.         v->blk_mv_type[s->block_index[2]] = 0;

  3997.         v->blk_mv_type[s->block_index[3]] = 0;

  3998.         vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3999.         vc1_mc_1mv(v, 0);

  4000.     }

  4001.     if (s->mb_x == s->mb_width - 1)

  4002.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0])*s->mb_stride);

  4003.     return 0;

  4004. }

  4005. 

  4006. static int vc1_decode_p_mb_intfi(VC1Context *v)

  4007. {

  4008.     MpegEncContext *s = &v->s;

  4009.     GetBitContext *gb = &s->gb;

  4010.     int i;

  4011.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4012.     int cbp = 0; /* cbp decoding stuff */

  4013.     int mqdiff, mquant; /* MB quantization */

  4014.     int ttmb = v->ttfrm; /* MB Transform type */

  4015. 

  4016.     int mb_has_coeffs = 1; /* last_flag */

  4017.     int dmv_x, dmv_y; /* Differential MV components */

  4018.     int val; /* temp values */

  4019.     int first_block = 1;

  4020.     int dst_idx, off;

  4021.     int pred_flag;

  4022.     int block_cbp = 0, pat, block_tt = 0;

  4023.     int idx_mbmode = 0;

  4024. 

  4025.     mquant = v->pq; /* Loosy initialization */

  4026. 

  4027.     idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);

  4028.     if (idx_mbmode <= 1) { // intra MB

  4029.         s->mb_intra = v->is_intra[s->mb_x] = 1;

  4030.         s->current_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  4031.         s->current_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  4032.         s->current_picture.f.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;

  4033.         GET_MQUANT();

  4034.         s->current_picture.f.qscale_table[mb_pos] = mquant;

  4035.         /* Set DC scale - y and c use the same (not sure if necessary here) */

  4036.         s->y_dc_scale = s->y_dc_scale_table[mquant];

  4037.         s->c_dc_scale = s->c_dc_scale_table[mquant];

  4038.         v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);

  4039.         mb_has_coeffs = idx_mbmode & 1;

  4040.         if (mb_has_coeffs)

  4041.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);

  4042.         dst_idx = 0;

  4043.         for (i = 0; i < 6; i++) {

  4044.             s->dc_val[0][s->block_index[i]]  = 0;

  4045.             v->mb_type[0][s->block_index[i]] = 1;

  4046.             dst_idx += i >> 2;

  4047.             val = ((cbp >> (5 - i)) & 1);

  4048.             v->a_avail = v->c_avail = 0;

  4049.             if (i == 2 || i == 3 || !s->first_slice_line)

  4050.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4051.             if (i == 1 || i == 3 || s->mb_x)

  4052.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4053. 

  4054.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4055.                                    (i & 4) ? v->codingset2 : v->codingset);

  4056.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4057.                 continue;

  4058.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4059.             off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4060.             off += v->cur_field_type ? ((i & 4) ? s->current_picture_ptr->f.linesize[1] : s->current_picture_ptr->f.linesize[0]) : 0;

  4061.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize);

  4062.             // TODO: loop filter

  4063.         }

  4064.     } else {

  4065.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  4066.         s->current_picture.f.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;

  4067.         for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;

  4068.         if (idx_mbmode <= 5) { // 1-MV

  4069.             dmv_x = dmv_y = 0;

  4070.             if (idx_mbmode & 1) {

  4071.                 get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);

  4072.             }

  4073.             vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);

  4074.             vc1_mc_1mv(v, 0);

  4075.             mb_has_coeffs = !(idx_mbmode & 2);

  4076.         } else { // 4-MV

  4077.             v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  4078.             for (i = 0; i < 6; i++) {

  4079.                 if (i < 4) {

  4080.                     dmv_x = dmv_y = pred_flag = 0;

  4081.                     val   = ((v->fourmvbp >> (3 - i)) & 1);

  4082.                     if (val) {

  4083.                         get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);

  4084.                     }

  4085.                     vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);

  4086.                     vc1_mc_4mv_luma(v, i, 0);

  4087.                 } else if (i == 4)

  4088.                     vc1_mc_4mv_chroma(v, 0);

  4089.             }

  4090.             mb_has_coeffs = idx_mbmode & 1;

  4091.         }

  4092.         if (mb_has_coeffs)

  4093.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4094.         if (cbp) {

  4095.             GET_MQUANT();

  4096.         }

  4097.         s->current_picture.f.qscale_table[mb_pos] = mquant;

  4098.         if (!v->ttmbf && cbp) {

  4099.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4100.         }

  4101.         dst_idx = 0;

  4102.         for (i = 0; i < 6; i++) {

  4103.             s->dc_val[0][s->block_index[i]] = 0;

  4104.             dst_idx += i >> 2;

  4105.             val = ((cbp >> (5 - i)) & 1);

  4106.             off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;

  4107.             if (v->cur_field_type)

  4108.                 off += (i & 4) ? s->current_picture_ptr->f.linesize[1] : s->current_picture_ptr->f.linesize[0];

  4109.             if (val) {

  4110.                 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4111.                                          first_block, s->dest[dst_idx] + off,

  4112.                                          (i & 4) ? s->uvlinesize : s->linesize,

  4113.                                          (i & 4) && (s->flags & CODEC_FLAG_GRAY),

  4114.                                          &block_tt);

  4115.                 block_cbp |= pat << (i << 2);

  4116.                 if (!v->ttmbf && ttmb < 8) ttmb = -1;

  4117.                 first_block = 0;

  4118.             }

  4119.         }

  4120.     }

  4121.     if (s->mb_x == s->mb_width - 1)

  4122.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);

  4123.     return 0;

  4124. }

  4125. 

  4126. /** Decode one B-frame MB (in Main profile)

  4127.  */

  4128. static void vc1_decode_b_mb(VC1Context *v)

  4129. {

  4130.     MpegEncContext *s = &v->s;

  4131.     GetBitContext *gb = &s->gb;

  4132.     int i, j;

  4133.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4134.     int cbp = 0; /* cbp decoding stuff */

  4135.     int mqdiff, mquant; /* MB quantization */

  4136.     int ttmb = v->ttfrm; /* MB Transform type */

  4137.     int mb_has_coeffs = 0; /* last_flag */

  4138.     int index, index1; /* LUT indexes */

  4139.     int val, sign; /* temp values */

  4140.     int first_block = 1;

  4141.     int dst_idx, off;

  4142.     int skipped, direct;

  4143.     int dmv_x[2], dmv_y[2];

  4144.     int bmvtype = BMV_TYPE_BACKWARD;

  4145. 

  4146.     mquant      = v->pq; /* Loosy initialization */

  4147.     s->mb_intra = 0;

  4148. 

  4149.     if (v->dmb_is_raw)

  4150.         direct = get_bits1(gb);

  4151.     else

  4152.         direct = v->direct_mb_plane[mb_pos];

  4153.     if (v->skip_is_raw)

  4154.         skipped = get_bits1(gb);

  4155.     else

  4156.         skipped = v->s.mbskip_table[mb_pos];

  4157. 

  4158.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  4159.     for (i = 0; i < 6; i++) {

  4160.         v->mb_type[0][s->block_index[i]] = 0;

  4161.         s->dc_val[0][s->block_index[i]]  = 0;

  4162.     }

  4163.     s->current_picture.f.qscale_table[mb_pos] = 0;

  4164. 

  4165.     if (!direct) {

  4166.         if (!skipped) {

  4167.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  4168.             dmv_x[1] = dmv_x[0];

  4169.             dmv_y[1] = dmv_y[0];

  4170.         }

  4171.         if (skipped || !s->mb_intra) {

  4172.             bmvtype = decode012(gb);

  4173.             switch (bmvtype) {

  4174.             case 0:

  4175.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  4176.                 break;

  4177.             case 1:

  4178.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  4179.                 break;

  4180.             case 2:

  4181.                 bmvtype  = BMV_TYPE_INTERPOLATED;

  4182.                 dmv_x[0] = dmv_y[0] = 0;

  4183.             }

  4184.         }

  4185.     }

  4186.     for (i = 0; i < 6; i++)

  4187.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4188. 

  4189.     if (skipped) {

  4190.         if (direct)

  4191.             bmvtype = BMV_TYPE_INTERPOLATED;

  4192.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4193.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4194.         return;

  4195.     }

  4196.     if (direct) {

  4197.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4198.         GET_MQUANT();

  4199.         s->mb_intra = 0;

  4200.         s->current_picture.f.qscale_table[mb_pos] = mquant;

  4201.         if (!v->ttmbf)

  4202.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4203.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  4204.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4205.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4206.     } else {

  4207.         if (!mb_has_coeffs && !s->mb_intra) {

  4208.             /* no coded blocks - effectively skipped */

  4209.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4210.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4211.             return;

  4212.         }

  4213.         if (s->mb_intra && !mb_has_coeffs) {

  4214.             GET_MQUANT();

  4215.             s->current_picture.f.qscale_table[mb_pos] = mquant;

  4216.             s->ac_pred = get_bits1(gb);

  4217.             cbp = 0;

  4218.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4219.         } else {

  4220.             if (bmvtype == BMV_TYPE_INTERPOLATED) {

  4221.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  4222.                 if (!mb_has_coeffs) {

  4223.                     /* interpolated skipped block */

  4224.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4225.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4226.                     return;

  4227.                 }

  4228.             }

  4229.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  4230.             if (!s->mb_intra) {

  4231.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  4232.             }

  4233.             if (s->mb_intra)

  4234.                 s->ac_pred = get_bits1(gb);

  4235.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4236.             GET_MQUANT();

  4237.             s->current_picture.f.qscale_table[mb_pos] = mquant;

  4238.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  4239.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4240.         }

  4241.     }

  4242.     dst_idx = 0;

  4243.     for (i = 0; i < 6; i++) {

  4244.         s->dc_val[0][s->block_index[i]] = 0;

  4245.         dst_idx += i >> 2;

  4246.         val = ((cbp >> (5 - i)) & 1);

  4247.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4248.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4249.         if (s->mb_intra) {

  4250.             /* check if prediction blocks A and C are available */

  4251.             v->a_avail = v->c_avail = 0;

  4252.             if (i == 2 || i == 3 || !s->first_slice_line)

  4253.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4254.             if (i == 1 || i == 3 || s->mb_x)

  4255.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4256. 

  4257.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4258.                                    (i & 4) ? v->codingset2 : v->codingset);

  4259.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4260.                 continue;

  4261.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4262.             if (v->rangeredfrm)

  4263.                 for (j = 0; j < 64; j++)

  4264.                     s->block[i][j] <<= 1;

  4265.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);

  4266.         } else if (val) {

  4267.             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4268.                                first_block, s->dest[dst_idx] + off,

  4269.                                (i & 4) ? s->uvlinesize : s->linesize,

  4270.                                (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);

  4271.             if (!v->ttmbf && ttmb < 8)

  4272.                 ttmb = -1;

  4273.             first_block = 0;

  4274.         }

  4275.     }

  4276. }

  4277. 

  4278. /** Decode one B-frame MB (in interlaced field B picture)

  4279.  */

  4280. static void vc1_decode_b_mb_intfi(VC1Context *v)

  4281. {

  4282.     MpegEncContext *s = &v->s;

  4283.     GetBitContext *gb = &s->gb;

  4284.     int i, j;

  4285.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4286.     int cbp = 0; /* cbp decoding stuff */

  4287.     int mqdiff, mquant; /* MB quantization */

  4288.     int ttmb = v->ttfrm; /* MB Transform type */

  4289.     int mb_has_coeffs = 0; /* last_flag */

  4290.     int val; /* temp value */

  4291.     int first_block = 1;

  4292.     int dst_idx, off;

  4293.     int fwd;

  4294.     int dmv_x[2], dmv_y[2], pred_flag[2];

  4295.     int bmvtype = BMV_TYPE_BACKWARD;

  4296.     int idx_mbmode, interpmvp;

  4297. 

  4298.     mquant      = v->pq; /* Loosy initialization */

  4299.     s->mb_intra = 0;

  4300. 

  4301.     idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);

  4302.     if (idx_mbmode <= 1) { // intra MB

  4303.         s->mb_intra = v->is_intra[s->mb_x] = 1;

  4304.         s->current_picture.f.motion_val[1][s->block_index[0]][0] = 0;

  4305.         s->current_picture.f.motion_val[1][s->block_index[0]][1] = 0;

  4306.         s->current_picture.f.mb_type[mb_pos + v->mb_off]         = MB_TYPE_INTRA;

  4307.         GET_MQUANT();

  4308.         s->current_picture.f.qscale_table[mb_pos] = mquant;

  4309.         /* Set DC scale - y and c use the same (not sure if necessary here) */

  4310.         s->y_dc_scale = s->y_dc_scale_table[mquant];

  4311.         s->c_dc_scale = s->c_dc_scale_table[mquant];

  4312.         v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);

  4313.         mb_has_coeffs = idx_mbmode & 1;

  4314.         if (mb_has_coeffs)

  4315.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);

  4316.         dst_idx = 0;

  4317.         for (i = 0; i < 6; i++) {

  4318.             s->dc_val[0][s->block_index[i]] = 0;

  4319.             dst_idx += i >> 2;

  4320.             val = ((cbp >> (5 - i)) & 1);

  4321.             v->mb_type[0][s->block_index[i]] = s->mb_intra;

  4322.             v->a_avail                       = v->c_avail = 0;

  4323.             if (i == 2 || i == 3 || !s->first_slice_line)

  4324.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  4325.             if (i == 1 || i == 3 || s->mb_x)

  4326.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  4327. 

  4328.             vc1_decode_intra_block(v, s->block[i], i, val, mquant,

  4329.                                    (i & 4) ? v->codingset2 : v->codingset);

  4330.             if ((i>3) && (s->flags & CODEC_FLAG_GRAY))

  4331.                 continue;

  4332.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

  4333.             if (v->rangeredfrm)

  4334.                 for (j = 0; j < 64; j++)

  4335.                     s->block[i][j] <<= 1;

  4336.             off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  4337.             off += v->cur_field_type ? ((i & 4) ? s->current_picture_ptr->f.linesize[1] : s->current_picture_ptr->f.linesize[0]) : 0;

  4338.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize);

  4339.             // TODO: yet to perform loop filter

  4340.         }

  4341.     } else {

  4342.         s->mb_intra = v->is_intra[s->mb_x] = 0;

  4343.         s->current_picture.f.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;

  4344.         for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;

  4345.         if (v->fmb_is_raw)

  4346.             fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);

  4347.         else

  4348.             fwd = v->forward_mb_plane[mb_pos];

  4349.         if (idx_mbmode <= 5) { // 1-MV

  4350.             dmv_x[0]     = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  4351.             pred_flag[0] = pred_flag[1] = 0;

  4352.             if (fwd)

  4353.                 bmvtype = BMV_TYPE_FORWARD;

  4354.             else {

  4355.                 bmvtype = decode012(gb);

  4356.                 switch (bmvtype) {

  4357.                 case 0:

  4358.                     bmvtype = BMV_TYPE_BACKWARD;

  4359.                     break;

  4360.                 case 1:

  4361.                     bmvtype = BMV_TYPE_DIRECT;

  4362.                     break;

  4363.                 case 2:

  4364.                     bmvtype   = BMV_TYPE_INTERPOLATED;

  4365.                     interpmvp = get_bits1(gb);

  4366.                 }

  4367.             }

  4368.             v->bmvtype = bmvtype;

  4369.             if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {

  4370.                 get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);

  4371.             }

  4372.             if (bmvtype == BMV_TYPE_INTERPOLATED && interpmvp) {

  4373.                 get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);

  4374.             }

  4375.             if (bmvtype == BMV_TYPE_DIRECT) {

  4376.                 dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;

  4377.                 dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;

  4378.             }

  4379.             vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);

  4380.             vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);

  4381.             mb_has_coeffs = !(idx_mbmode & 2);

  4382.         } else { // 4-MV

  4383.             if (fwd)

  4384.                 bmvtype = BMV_TYPE_FORWARD;

  4385.             v->bmvtype  = bmvtype;

  4386.             v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);

  4387.             for (i = 0; i < 6; i++) {

  4388.                 if (i < 4) {

  4389.                     dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;

  4390.                     dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;

  4391.                     val = ((v->fourmvbp >> (3 - i)) & 1);

  4392.                     if (val) {

  4393.                         get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],

  4394.                                                  &dmv_y[bmvtype == BMV_TYPE_BACKWARD],

  4395.                                              &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);

  4396.                     }

  4397.                     vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);

  4398.                     vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD);

  4399.                 } else if (i == 4)

  4400.                     vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);

  4401.             }

  4402.             mb_has_coeffs = idx_mbmode & 1;

  4403.         }

  4404.         if (mb_has_coeffs)

  4405.             cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  4406.         if (cbp) {

  4407.             GET_MQUANT();

  4408.         }

  4409.         s->current_picture.f.qscale_table[mb_pos] = mquant;

  4410.         if (!v->ttmbf && cbp) {

  4411.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  4412.         }

  4413.         dst_idx = 0;

  4414.         for (i = 0; i < 6; i++) {

  4415.             s->dc_val[0][s->block_index[i]] = 0;

  4416.             dst_idx += i >> 2;

  4417.             val = ((cbp >> (5 - i)) & 1);

  4418.             off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;

  4419.             if (v->cur_field_type)

  4420.                 off += (i & 4) ? s->current_picture_ptr->f.linesize[1] : s->current_picture_ptr->f.linesize[0];

  4421.             if (val) {

  4422.                 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,

  4423.                                    first_block, s->dest[dst_idx] + off,

  4424.                                    (i & 4) ? s->uvlinesize : s->linesize,

  4425.                                    (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);

  4426.                 if (!v->ttmbf && ttmb < 8)

  4427.                     ttmb = -1;

  4428.                 first_block = 0;

  4429.             }

  4430.         }

  4431.     }

  4432. }

  4433. 

  4434. /** Decode blocks of I-frame

  4435.  */

  4436. static void vc1_decode_i_blocks(VC1Context *v)

  4437. {

  4438.     int k, j;

  4439.     MpegEncContext *s = &v->s;

  4440.     int cbp, val;

  4441.     uint8_t *coded_val;

  4442.     int mb_pos;

  4443. 

  4444.     /* select codingmode used for VLC tables selection */

  4445.     switch (v->y_ac_table_index) {

  4446.     case 0:

  4447.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4448.         break;

  4449.     case 1:

  4450.         v->codingset = CS_HIGH_MOT_INTRA;

  4451.         break;

  4452.     case 2:

  4453.         v->codingset = CS_MID_RATE_INTRA;

  4454.         break;

  4455.     }

  4456. 

  4457.     switch (v->c_ac_table_index) {

  4458.     case 0:

  4459.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4460.         break;

  4461.     case 1:

  4462.         v->codingset2 = CS_HIGH_MOT_INTER;

  4463.         break;

  4464.     case 2:

  4465.         v->codingset2 = CS_MID_RATE_INTER;

  4466.         break;

  4467.     }

  4468. 

  4469.     /* Set DC scale - y and c use the same */

  4470.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  4471.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  4472. 

  4473.     //do frame decode

  4474.     s->mb_x = s->mb_y = 0;

  4475.     s->mb_intra         = 1;

  4476.     s->first_slice_line = 1;

  4477.     for (s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  4478.         s->mb_x = 0;

  4479.         ff_init_block_index(s);

  4480.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  4481.             uint8_t *dst[6];

  4482.             ff_update_block_index(s);

  4483.             dst[0] = s->dest[0];

  4484.             dst[1] = dst[0] + 8;

  4485.             dst[2] = s->dest[0] + s->linesize * 8;

  4486.             dst[3] = dst[2] + 8;

  4487.             dst[4] = s->dest[1];

  4488.             dst[5] = s->dest[2];

  4489.             s->dsp.clear_blocks(s->block[0]);

  4490.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  4491.             s->current_picture.f.mb_type[mb_pos]                     = MB_TYPE_INTRA;

  4492.             s->current_picture.f.qscale_table[mb_pos]                = v->pq;

  4493.             s->current_picture.f.motion_val[1][s->block_index[0]][0] = 0;

  4494.             s->current_picture.f.motion_val[1][s->block_index[0]][1] = 0;

  4495. 

  4496.             // do actual MB decoding and displaying

  4497.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  4498.             v->s.ac_pred = get_bits1(&v->s.gb);

  4499. 

  4500.             for (k = 0; k < 6; k++) {

  4501.                 val = ((cbp >> (5 - k)) & 1);

  4502. 

  4503.                 if (k < 4) {

  4504.                     int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);

  4505.                     val        = val ^ pred;

  4506.                     *coded_val = val;

  4507.                 }

  4508.                 cbp |= val << (5 - k);

  4509. 

  4510.                 vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);

  4511. 

  4512.                 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))

  4513.                     continue;

  4514.                 v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);

  4515.                 if (v->pq >= 9 && v->overlap) {

  4516.                     if (v->rangeredfrm)

  4517.                         for (j = 0; j < 64; j++)

  4518.                             s->block[k][j] <<= 1;

  4519.                     s->dsp.put_signed_pixels_clamped(s->block[k], dst[k], k & 4 ? s->uvlinesize : s->linesize);

  4520.                 } else {

  4521.                     if (v->rangeredfrm)

  4522.                         for (j = 0; j < 64; j++)

  4523.                             s->block[k][j] = (s->block[k][j] - 64) << 1;

  4524.                     s->dsp.put_pixels_clamped(s->block[k], dst[k], k & 4 ? s->uvlinesize : s->linesize);

  4525.                 }

  4526.             }

  4527. 

  4528.             if (v->pq >= 9 && v->overlap) {

  4529.                 if (s->mb_x) {

  4530.                     v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);

  4531.                     v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  4532.                     if (!(s->flags & CODEC_FLAG_GRAY)) {

  4533.                         v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  4534.                         v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  4535.                     }

  4536.                 }

  4537.                 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  4538.                 v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  4539.                 if (!s->first_slice_line) {

  4540.                     v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);

  4541.                     v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  4542.                     if (!(s->flags & CODEC_FLAG_GRAY)) {

  4543.                         v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  4544.                         v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  4545.                     }

  4546.                 }

  4547.                 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  4548.                 v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  4549.             }

  4550.             if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);

  4551. 

  4552.             if (get_bits_count(&s->gb) > v->bits) {

  4553.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  4554.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",

  4555.                        get_bits_count(&s->gb), v->bits);

  4556.                 return;

  4557.             }

  4558.         }

  4559.         if (!v->s.loop_filter)

  4560.             ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4561.         else if (s->mb_y)

  4562.             ff_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  4563. 

  4564.         s->first_slice_line = 0;

  4565.     }

  4566.     if (v->s.loop_filter)

  4567.         ff_draw_horiz_band(s, (s->mb_height - 1) * 16, 16);

  4568.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  4569. }

  4570. 

  4571. /** Decode blocks of I-frame for advanced profile

  4572.  */

  4573. static void vc1_decode_i_blocks_adv(VC1Context *v)

  4574. {

  4575.     int k;

  4576.     MpegEncContext *s = &v->s;

  4577.     int cbp, val;

  4578.     uint8_t *coded_val;

  4579.     int mb_pos;

  4580.     int mquant = v->pq;

  4581.     int mqdiff;

  4582.     GetBitContext *gb = &s->gb;

  4583. 

  4584.     /* select codingmode used for VLC tables selection */

  4585.     switch (v->y_ac_table_index) {

  4586.     case 0:

  4587.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4588.         break;

  4589.     case 1:

  4590.         v->codingset = CS_HIGH_MOT_INTRA;

  4591.         break;

  4592.     case 2:

  4593.         v->codingset = CS_MID_RATE_INTRA;

  4594.         break;

  4595.     }

  4596. 

  4597.     switch (v->c_ac_table_index) {

  4598.     case 0:

  4599.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4600.         break;

  4601.     case 1:

  4602.         v->codingset2 = CS_HIGH_MOT_INTER;

  4603.         break;

  4604.     case 2:

  4605.         v->codingset2 = CS_MID_RATE_INTER;

  4606.         break;

  4607.     }

  4608. 

  4609.     // do frame decode

  4610.     s->mb_x             = s->mb_y = 0;

  4611.     s->mb_intra         = 1;

  4612.     s->first_slice_line = 1;

  4613.     s->mb_y             = s->start_mb_y;

  4614.     if (s->start_mb_y) {

  4615.         s->mb_x = 0;

  4616.         ff_init_block_index(s);

  4617.         memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,

  4618.                (1 + s->b8_stride) * sizeof(*s->coded_block));

  4619.     }

  4620.     for (; s->mb_y < s->end_mb_y; s->mb_y++) {

  4621.         s->mb_x = 0;

  4622.         ff_init_block_index(s);

  4623.         for (;s->mb_x < s->mb_width; s->mb_x++) {

  4624.             DCTELEM (*block)[64] = v->block[v->cur_blk_idx];

  4625.             ff_update_block_index(s);

  4626.             s->dsp.clear_blocks(block[0]);

  4627.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  4628.             s->current_picture.f.mb_type[mb_pos + v->mb_off]                         = MB_TYPE_INTRA;

  4629.             s->current_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  4630.             s->current_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  4631. 

  4632.             // do actual MB decoding and displaying

  4633.             if (v->fieldtx_is_raw)

  4634.                 v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);

  4635.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  4636.             if ( v->acpred_is_raw)

  4637.                 v->s.ac_pred = get_bits1(&v->s.gb);

  4638.             else

  4639.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  4640. 

  4641.             if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)

  4642.                 v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);

  4643. 

  4644.             GET_MQUANT();

  4645. 

  4646.             s->current_picture.f.qscale_table[mb_pos] = mquant;

  4647.             /* Set DC scale - y and c use the same */

  4648.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  4649.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  4650. 

  4651.             for (k = 0; k < 6; k++) {

  4652.                 val = ((cbp >> (5 - k)) & 1);

  4653. 

  4654.                 if (k < 4) {

  4655.                     int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);

  4656.                     val        = val ^ pred;

  4657.                     *coded_val = val;

  4658.                 }

  4659.                 cbp |= val << (5 - k);

  4660. 

  4661.                 v->a_avail = !s->first_slice_line || (k == 2 || k == 3);

  4662.                 v->c_avail = !!s->mb_x || (k == 1 || k == 3);

  4663. 

  4664.                 vc1_decode_i_block_adv(v, block[k], k, val,

  4665.                                        (k < 4) ? v->codingset : v->codingset2, mquant);

  4666. 

  4667.                 if (k > 3 && (s->flags & CODEC_FLAG_GRAY))

  4668.                     continue;

  4669.                 v->vc1dsp.vc1_inv_trans_8x8(block[k]);

  4670.             }

  4671. 

  4672.             vc1_smooth_overlap_filter_iblk(v);

  4673.             vc1_put_signed_blocks_clamped(v);

  4674.             if (v->s.loop_filter) vc1_loop_filter_iblk_delayed(v, v->pq);

  4675. 

  4676.             if (get_bits_count(&s->gb) > v->bits) {

  4677.                 // TODO: may need modification to handle slice coding

  4678.                 ff_er_add_slice(s, 0, s->start_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  4679.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",

  4680.                        get_bits_count(&s->gb), v->bits);

  4681.                 return;

  4682.             }

  4683.         }

  4684.         if (!v->s.loop_filter)

  4685.             ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4686.         else if (s->mb_y)

  4687.             ff_draw_horiz_band(s, (s->mb_y-1) * 16, 16);

  4688.         s->first_slice_line = 0;

  4689.     }

  4690. 

  4691.     /* raw bottom MB row */

  4692.     s->mb_x = 0;

  4693.     ff_init_block_index(s);

  4694.     for (;s->mb_x < s->mb_width; s->mb_x++) {

  4695.         ff_update_block_index(s);

  4696.         vc1_put_signed_blocks_clamped(v);

  4697.         if (v->s.loop_filter)

  4698.             vc1_loop_filter_iblk_delayed(v, v->pq);

  4699.     }

  4700.     if (v->s.loop_filter)

  4701.         ff_draw_horiz_band(s, (s->end_mb_y-1)*16, 16);

  4702.     ff_er_add_slice(s, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  4703.                     (s->end_mb_y << v->field_mode) - 1, (AC_END|DC_END|MV_END));

  4704. }

  4705. 

  4706. static void vc1_decode_p_blocks(VC1Context *v)

  4707. {

  4708.     MpegEncContext *s = &v->s;

  4709.     int apply_loop_filter;

  4710. 

  4711.     /* select codingmode used for VLC tables selection */

  4712.     switch (v->c_ac_table_index) {

  4713.     case 0:

  4714.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4715.         break;

  4716.     case 1:

  4717.         v->codingset = CS_HIGH_MOT_INTRA;

  4718.         break;

  4719.     case 2:

  4720.         v->codingset = CS_MID_RATE_INTRA;

  4721.         break;

  4722.     }

  4723. 

  4724.     switch (v->c_ac_table_index) {

  4725.     case 0:

  4726.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4727.         break;

  4728.     case 1:

  4729.         v->codingset2 = CS_HIGH_MOT_INTER;

  4730.         break;

  4731.     case 2:

  4732.         v->codingset2 = CS_MID_RATE_INTER;

  4733.         break;

  4734.     }

  4735. 

  4736.     apply_loop_filter   = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  4737.     s->first_slice_line = 1;

  4738.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  4739.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  4740.         s->mb_x = 0;

  4741.         ff_init_block_index(s);

  4742.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  4743.             ff_update_block_index(s);

  4744. 

  4745.             if (v->fcm == 2)

  4746.                 vc1_decode_p_mb_intfi(v);

  4747.             else if (v->fcm == 1)

  4748.                 vc1_decode_p_mb_intfr(v);

  4749.             else vc1_decode_p_mb(v);

  4750.             if (s->mb_y != s->start_mb_y && apply_loop_filter && v->fcm == 0)

  4751.                 vc1_apply_p_loop_filter(v);

  4752.             if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  4753.                 // TODO: may need modification to handle slice coding

  4754.                 ff_er_add_slice(s, 0, s->start_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  4755.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",

  4756.                        get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);

  4757.                 return;

  4758.             }

  4759.         }

  4760.         memmove(v->cbp_base,      v->cbp,      sizeof(v->cbp_base[0])      * s->mb_stride);

  4761.         memmove(v->ttblk_base,    v->ttblk,    sizeof(v->ttblk_base[0])    * s->mb_stride);

  4762.         memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);

  4763.         memmove(v->luma_mv_base,  v->luma_mv,  sizeof(v->luma_mv_base[0])  * s->mb_stride);

  4764.         if (s->mb_y != s->start_mb_y) ff_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  4765.         s->first_slice_line = 0;

  4766.     }

  4767.     if (apply_loop_filter) {

  4768.         s->mb_x = 0;

  4769.         ff_init_block_index(s);

  4770.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  4771.             ff_update_block_index(s);

  4772.             vc1_apply_p_loop_filter(v);

  4773.         }

  4774.     }

  4775.     if (s->end_mb_y >= s->start_mb_y)

  4776.         ff_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  4777.     ff_er_add_slice(s, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  4778.                     (s->end_mb_y << v->field_mode) - 1, (AC_END|DC_END|MV_END));

  4779. }

  4780. 

  4781. static void vc1_decode_b_blocks(VC1Context *v)

  4782. {

  4783.     MpegEncContext *s = &v->s;

  4784. 

  4785.     /* select codingmode used for VLC tables selection */

  4786.     switch (v->c_ac_table_index) {

  4787.     case 0:

  4788.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4789.         break;

  4790.     case 1:

  4791.         v->codingset = CS_HIGH_MOT_INTRA;

  4792.         break;

  4793.     case 2:

  4794.         v->codingset = CS_MID_RATE_INTRA;

  4795.         break;

  4796.     }

  4797. 

  4798.     switch (v->c_ac_table_index) {

  4799.     case 0:

  4800.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4801.         break;

  4802.     case 1:

  4803.         v->codingset2 = CS_HIGH_MOT_INTER;

  4804.         break;

  4805.     case 2:

  4806.         v->codingset2 = CS_MID_RATE_INTER;

  4807.         break;

  4808.     }

  4809. 

  4810.     s->first_slice_line = 1;

  4811.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  4812.         s->mb_x = 0;

  4813.         ff_init_block_index(s);

  4814.         for (; s->mb_x < s->mb_width; s->mb_x++) {

  4815.             ff_update_block_index(s);

  4816. 

  4817.             if (v->fcm == 2)

  4818.                 vc1_decode_b_mb_intfi(v);

  4819.             else

  4820.                 vc1_decode_b_mb(v);

  4821.             if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  4822.                 // TODO: may need modification to handle slice coding

  4823.                 ff_er_add_slice(s, 0, s->start_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  4824.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",

  4825.                        get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);

  4826.                 return;

  4827.             }

  4828.             if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);

  4829.         }

  4830.         if (!v->s.loop_filter)

  4831.             ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4832.         else if (s->mb_y)

  4833.             ff_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);

  4834.         s->first_slice_line = 0;

  4835.     }

  4836.     if (v->s.loop_filter)

  4837.         ff_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);

  4838.     ff_er_add_slice(s, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,

  4839.                     (s->end_mb_y << v->field_mode) - 1, (AC_END|DC_END|MV_END));

  4840. }

  4841. 

  4842. static void vc1_decode_skip_blocks(VC1Context *v)

  4843. {

  4844.     MpegEncContext *s = &v->s;

  4845. 

  4846.     ff_er_add_slice(s, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, (AC_END|DC_END|MV_END));

  4847.     s->first_slice_line = 1;

  4848.     for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {

  4849.         s->mb_x = 0;

  4850.         ff_init_block_index(s);

  4851.         ff_update_block_index(s);

  4852.         memcpy(s->dest[0], s->last_picture.f.data[0] + s->mb_y * 16 * s->linesize,   s->linesize   * 16);

  4853.         memcpy(s->dest[1], s->last_picture.f.data[1] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);

  4854.         memcpy(s->dest[2], s->last_picture.f.data[2] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);

  4855.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4856.         s->first_slice_line = 0;

  4857.     }

  4858.     s->pict_type = AV_PICTURE_TYPE_P;

  4859. }

  4860. 

  4861. static void vc1_decode_blocks(VC1Context *v)

  4862. {

  4863. 

  4864.     v->s.esc3_level_length = 0;

  4865.     if (v->x8_type) {

  4866.         ff_intrax8_decode_picture(&v->x8, 2*v->pq + v->halfpq, v->pq * !v->pquantizer);

  4867.     } else {

  4868.         v->cur_blk_idx     =  0;

  4869.         v->left_blk_idx    = -1;

  4870.         v->topleft_blk_idx =  1;

  4871.         v->top_blk_idx     =  2;

  4872.         switch (v->s.pict_type) {

  4873.         case AV_PICTURE_TYPE_I:

  4874.             if (v->profile == PROFILE_ADVANCED)

  4875.                 vc1_decode_i_blocks_adv(v);

  4876.             else

  4877.                 vc1_decode_i_blocks(v);

  4878.             break;

  4879.         case AV_PICTURE_TYPE_P:

  4880.             if (v->p_frame_skipped)

  4881.                 vc1_decode_skip_blocks(v);

  4882.             else

  4883.                 vc1_decode_p_blocks(v);

  4884.             break;

  4885.         case AV_PICTURE_TYPE_B:

  4886.             if (v->bi_type) {

  4887.                 if (v->profile == PROFILE_ADVANCED)

  4888.                     vc1_decode_i_blocks_adv(v);

  4889.                 else

  4890.                     vc1_decode_i_blocks(v);

  4891.             } else

  4892.                 vc1_decode_b_blocks(v);

  4893.             break;

  4894.         }

  4895.     }

  4896. }

  4897. 

  4898. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  4899. 

  4900. typedef struct {

  4901.     /**

  4902.      * Transform coefficients for both sprites in 16.16 fixed point format,

  4903.      * in the order they appear in the bitstream:

  4904.      *  x scale

  4905.      *  rotation 1 (unused)

  4906.      *  x offset

  4907.      *  rotation 2 (unused)

  4908.      *  y scale

  4909.      *  y offset

  4910.      *  alpha

  4911.      */

  4912.     int coefs[2][7];

  4913. 

  4914.     int effect_type, effect_flag;

  4915.     int effect_pcount1, effect_pcount2;   ///< amount of effect parameters stored in effect_params

  4916.     int effect_params1[15], effect_params2[10]; ///< effect parameters in 16.16 fixed point format

  4917. } SpriteData;

  4918. 

  4919. static inline int get_fp_val(GetBitContext* gb)

  4920. {

  4921.     return (get_bits_long(gb, 30) - (1 << 29)) << 1;

  4922. }

  4923. 

  4924. static void vc1_sprite_parse_transform(GetBitContext* gb, int c[7])

  4925. {

  4926.     c[1] = c[3] = 0;

  4927. 

  4928.     switch (get_bits(gb, 2)) {

  4929.     case 0:

  4930.         c[0] = 1 << 16;

  4931.         c[2] = get_fp_val(gb);

  4932.         c[4] = 1 << 16;

  4933.         break;

  4934.     case 1:

  4935.         c[0] = c[4] = get_fp_val(gb);

  4936.         c[2] = get_fp_val(gb);

  4937.         break;

  4938.     case 2:

  4939.         c[0] = get_fp_val(gb);

  4940.         c[2] = get_fp_val(gb);

  4941.         c[4] = get_fp_val(gb);

  4942.         break;

  4943.     case 3:

  4944.         c[0] = get_fp_val(gb);

  4945.         c[1] = get_fp_val(gb);

  4946.         c[2] = get_fp_val(gb);

  4947.         c[3] = get_fp_val(gb);

  4948.         c[4] = get_fp_val(gb);

  4949.         break;

  4950.     }

  4951.     c[5] = get_fp_val(gb);

  4952.     if (get_bits1(gb))

  4953.         c[6] = get_fp_val(gb);

  4954.     else

  4955.         c[6] = 1 << 16;

  4956. }

  4957. 

  4958. static void vc1_parse_sprites(VC1Context *v, GetBitContext* gb, SpriteData* sd)

  4959. {

  4960.     AVCodecContext *avctx = v->s.avctx;

  4961.     int sprite, i;

  4962. 

  4963.     for (sprite = 0; sprite <= v->two_sprites; sprite++) {

  4964.         vc1_sprite_parse_transform(gb, sd->coefs[sprite]);

  4965.         if (sd->coefs[sprite][1] || sd->coefs[sprite][3])

  4966.             av_log_ask_for_sample(avctx, "Rotation coefficients are not zero");

  4967.         av_log(avctx, AV_LOG_DEBUG, sprite ? "S2:" : "S1:");

  4968.         for (i = 0; i < 7; i++)

  4969.             av_log(avctx, AV_LOG_DEBUG, " %d.%.3d",

  4970.                    sd->coefs[sprite][i] / (1<<16),

  4971.                    (abs(sd->coefs[sprite][i]) & 0xFFFF) * 1000 / (1 << 16));

  4972.         av_log(avctx, AV_LOG_DEBUG, "\n");

  4973.     }

  4974. 

  4975.     skip_bits(gb, 2);

  4976.     if (sd->effect_type = get_bits_long(gb, 30)) {

  4977.         switch (sd->effect_pcount1 = get_bits(gb, 4)) {

  4978.         case 7:

  4979.             vc1_sprite_parse_transform(gb, sd->effect_params1);

  4980.             break;

  4981.         case 14:

  4982.             vc1_sprite_parse_transform(gb, sd->effect_params1);

  4983.             vc1_sprite_parse_transform(gb, sd->effect_params1 + 7);

  4984.             break;

  4985.         default:

  4986.             for (i = 0; i < sd->effect_pcount1; i++)

  4987.                 sd->effect_params1[i] = get_fp_val(gb);

  4988.         }

  4989.         if (sd->effect_type != 13 || sd->effect_params1[0] != sd->coefs[0][6]) {

  4990.             // effect 13 is simple alpha blending and matches the opacity above

  4991.             av_log(avctx, AV_LOG_DEBUG, "Effect: %d; params: ", sd->effect_type);

  4992.             for (i = 0; i < sd->effect_pcount1; i++)

  4993.                 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",

  4994.                        sd->effect_params1[i] / (1 << 16),

  4995.                        (abs(sd->effect_params1[i]) & 0xFFFF) * 1000 / (1 << 16));

  4996.             av_log(avctx, AV_LOG_DEBUG, "\n");

  4997.         }

  4998. 

  4999.         sd->effect_pcount2 = get_bits(gb, 16);

  5000.         if (sd->effect_pcount2 > 10) {

  5001.             av_log(avctx, AV_LOG_ERROR, "Too many effect parameters\n");

  5002.             return;

  5003.         } else if (sd->effect_pcount2) {

  5004.             i = -1;

  5005.             av_log(avctx, AV_LOG_DEBUG, "Effect params 2: ");

  5006.             while (++i < sd->effect_pcount2) {

  5007.                 sd->effect_params2[i] = get_fp_val(gb);

  5008.                 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",

  5009.                        sd->effect_params2[i] / (1 << 16),

  5010.                        (abs(sd->effect_params2[i]) & 0xFFFF) * 1000 / (1 << 16));

  5011.             }

  5012.             av_log(avctx, AV_LOG_DEBUG, "\n");

  5013.         }

  5014.     }

  5015.     if (sd->effect_flag = get_bits1(gb))

  5016.         av_log(avctx, AV_LOG_DEBUG, "Effect flag set\n");

  5017. 

  5018.     if (get_bits_count(gb) >= gb->size_in_bits +

  5019.        (avctx->codec_id == CODEC_ID_WMV3IMAGE ? 64 : 0))

  5020.         av_log(avctx, AV_LOG_ERROR, "Buffer overrun\n");

  5021.     if (get_bits_count(gb) < gb->size_in_bits - 8)

  5022.         av_log(avctx, AV_LOG_WARNING, "Buffer not fully read\n");

  5023. }

  5024. 

  5025. static void vc1_draw_sprites(VC1Context *v, SpriteData* sd)

  5026. {

  5027.     int i, plane, row, sprite;

  5028.     int sr_cache[2][2] = { { -1, -1 }, { -1, -1 } };

  5029.     uint8_t* src_h[2][2];

  5030.     int xoff[2], xadv[2], yoff[2], yadv[2], alpha;

  5031.     int ysub[2];

  5032.     MpegEncContext *s = &v->s;

  5033. 

  5034.     for (i = 0; i < 2; i++) {

  5035.         xoff[i] = av_clip(sd->coefs[i][2], 0, v->sprite_width-1 << 16);

  5036.         xadv[i] = sd->coefs[i][0];

  5037.         if (xadv[i] != 1<<16 || (v->sprite_width << 16) - (v->output_width << 16) - xoff[i])

  5038.             xadv[i] = av_clip(xadv[i], 0, ((v->sprite_width<<16) - xoff[i] - 1) / v->output_width);

  5039. 

  5040.         yoff[i] = av_clip(sd->coefs[i][5], 0, v->sprite_height-1 << 16);

  5041.         yadv[i] = av_clip(sd->coefs[i][4], 0, ((v->sprite_height << 16) - yoff[i]) / v->output_height);

  5042.     }

  5043.     alpha = av_clip(sd->coefs[1][6], 0, (1<<16) - 1);

  5044. 

  5045.     for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++) {

  5046.         int width = v->output_width>>!!plane;

  5047. 

  5048.         for (row = 0; row < v->output_height>>!!plane; row++) {

  5049.             uint8_t *dst = v->sprite_output_frame.data[plane] +

  5050.                            v->sprite_output_frame.linesize[plane] * row;

  5051. 

  5052.             for (sprite = 0; sprite <= v->two_sprites; sprite++) {

  5053.                 uint8_t *iplane = s->current_picture.f.data[plane];

  5054.                 int      iline  = s->current_picture.f.linesize[plane];

  5055.                 int      ycoord = yoff[sprite] + yadv[sprite] * row;

  5056.                 int      yline  = ycoord >> 16;

  5057.                 ysub[sprite] = ycoord & 0xFFFF;

  5058.                 if (sprite) {

  5059.                     iplane = s->last_picture.f.data[plane];

  5060.                     iline  = s->last_picture.f.linesize[plane];

  5061.                 }

  5062.                 if (!(xoff[sprite] & 0xFFFF) && xadv[sprite] == 1 << 16) {

  5063.                         src_h[sprite][0] = iplane + (xoff[sprite] >> 16) +  yline      * iline;

  5064.                     if (ysub[sprite])

  5065.                         src_h[sprite][1] = iplane + (xoff[sprite] >> 16) + (yline + 1) * iline;

  5066.                 } else {

  5067.                     if (sr_cache[sprite][0] != yline) {

  5068.                         if (sr_cache[sprite][1] == yline) {

  5069.                             FFSWAP(uint8_t*, v->sr_rows[sprite][0], v->sr_rows[sprite][1]);

  5070.                             FFSWAP(int,        sr_cache[sprite][0],   sr_cache[sprite][1]);

  5071.                         } else {

  5072.                             v->vc1dsp.sprite_h(v->sr_rows[sprite][0], iplane + yline * iline, xoff[sprite], xadv[sprite], width);

  5073.                             sr_cache[sprite][0] = yline;

  5074.                         }

  5075.                     }

  5076.                     if (ysub[sprite] && sr_cache[sprite][1] != yline + 1) {

  5077.                         v->vc1dsp.sprite_h(v->sr_rows[sprite][1], iplane + (yline + 1) * iline, xoff[sprite], xadv[sprite], width);

  5078.                         sr_cache[sprite][1] = yline + 1;

  5079.                     }

  5080.                     src_h[sprite][0] = v->sr_rows[sprite][0];

  5081.                     src_h[sprite][1] = v->sr_rows[sprite][1];

  5082.                 }

  5083.             }

  5084. 

  5085.             if (!v->two_sprites) {

  5086.                 if (ysub[0]) {

  5087.                     v->vc1dsp.sprite_v_single(dst, src_h[0][0], src_h[0][1], ysub[0], width);

  5088.                 } else {

  5089.                     memcpy(dst, src_h[0][0], width);

  5090.                 }

  5091.             } else {

  5092.                 if (ysub[0] && ysub[1]) {

  5093.                     v->vc1dsp.sprite_v_double_twoscale(dst, src_h[0][0], src_h[0][1], ysub[0],

  5094.                                                        src_h[1][0], src_h[1][1], ysub[1], alpha, width);

  5095.                 } else if (ysub[0]) {

  5096.                     v->vc1dsp.sprite_v_double_onescale(dst, src_h[0][0], src_h[0][1], ysub[0],

  5097.                                                        src_h[1][0], alpha, width);

  5098.                 } else if (ysub[1]) {

  5099.                     v->vc1dsp.sprite_v_double_onescale(dst, src_h[1][0], src_h[1][1], ysub[1],

  5100.                                                        src_h[0][0], (1<<16)-1-alpha, width);

  5101.                 } else {

  5102.                     v->vc1dsp.sprite_v_double_noscale(dst, src_h[0][0], src_h[1][0], alpha, width);

  5103.                 }

  5104.             }

  5105.         }

  5106. 

  5107.         if (!plane) {

  5108.             for (i = 0; i < 2; i++) {

  5109.                 xoff[i] >>= 1;

  5110.                 yoff[i] >>= 1;

  5111.             }

  5112.         }

  5113. 

  5114.     }

  5115. }

  5116. 

  5117. 

  5118. static int vc1_decode_sprites(VC1Context *v, GetBitContext* gb)

  5119. {

  5120.     MpegEncContext *s     = &v->s;

  5121.     AVCodecContext *avctx = s->avctx;

  5122.     SpriteData sd;

  5123. 

  5124.     vc1_parse_sprites(v, gb, &sd);

  5125. 

  5126.     if (!s->current_picture.f.data[0]) {

  5127.         av_log(avctx, AV_LOG_ERROR, "Got no sprites\n");

  5128.         return -1;

  5129.     }

  5130. 

  5131.     if (v->two_sprites && (!s->last_picture_ptr || !s->last_picture.f.data[0])) {

  5132.         av_log(avctx, AV_LOG_WARNING, "Need two sprites, only got one\n");

  5133.         v->two_sprites = 0;

  5134.     }

  5135. 

  5136.     if (v->sprite_output_frame.data[0])

  5137.         avctx->release_buffer(avctx, &v->sprite_output_frame);

  5138. 

  5139.     v->sprite_output_frame.buffer_hints = FF_BUFFER_HINTS_VALID;

  5140.     v->sprite_output_frame.reference = 0;

  5141.     if (avctx->get_buffer(avctx, &v->sprite_output_frame) < 0) {

  5142.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  5143.         return -1;

  5144.     }

  5145. 

  5146.     vc1_draw_sprites(v, &sd);

  5147. 

  5148.     return 0;

  5149. }

  5150. 

  5151. static void vc1_sprite_flush(AVCodecContext *avctx)

  5152. {

  5153.     VC1Context *v     = avctx->priv_data;

  5154.     MpegEncContext *s = &v->s;

  5155.     AVFrame *f = &s->current_picture.f;

  5156.     int plane, i;

  5157. 

  5158.     /* Windows Media Image codecs have a convergence interval of two keyframes.

  5159.        Since we can't enforce it, clear to black the missing sprite. This is

  5160.        wrong but it looks better than doing nothing. */

  5161. 

  5162.     if (f->data[0])

  5163.         for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++)

  5164.             for (i = 0; i < v->sprite_height>>!!plane; i++)

  5165.                 memset(f->data[plane] + i * f->linesize[plane],

  5166.                        plane ? 128 : 0, f->linesize[plane]);

  5167. }

  5168. 

  5169. #endif

  5170. 

  5171. static av_cold int vc1_decode_init_alloc_tables(VC1Context *v)

  5172. {

  5173.     MpegEncContext *s = &v->s;

  5174.     int i;

  5175. 

  5176.     /* Allocate mb bitplanes */

  5177.     v->mv_type_mb_plane = av_malloc (s->mb_stride * s->mb_height);

  5178.     v->direct_mb_plane  = av_malloc (s->mb_stride * s->mb_height);

  5179.     v->forward_mb_plane = av_malloc (s->mb_stride * s->mb_height);

  5180.     v->fieldtx_plane    = av_mallocz(s->mb_stride * s->mb_height);

  5181.     v->acpred_plane     = av_malloc (s->mb_stride * s->mb_height);

  5182.     v->over_flags_plane = av_malloc (s->mb_stride * s->mb_height);

  5183. 

  5184.     v->n_allocated_blks = s->mb_width + 2;

  5185.     v->block            = av_malloc(sizeof(*v->block) * v->n_allocated_blks);

  5186.     v->cbp_base         = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  5187.     v->cbp              = v->cbp_base + s->mb_stride;

  5188.     v->ttblk_base       = av_malloc(sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);

  5189.     v->ttblk            = v->ttblk_base + s->mb_stride;

  5190.     v->is_intra_base    = av_mallocz(sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);

  5191.     v->is_intra         = v->is_intra_base + s->mb_stride;

  5192.     v->luma_mv_base     = av_malloc(sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);

  5193.     v->luma_mv          = v->luma_mv_base + s->mb_stride;

  5194. 

  5195.     /* allocate block type info in that way so it could be used with s->block_index[] */

  5196.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5197.     v->mb_type[0]   = v->mb_type_base + s->b8_stride + 1;

  5198.     v->mb_type[1]   = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  5199.     v->mb_type[2]   = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  5200. 

  5201.     /* allocate memory to store block level MV info */

  5202.     v->blk_mv_type_base = av_mallocz(     s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5203.     v->blk_mv_type      = v->blk_mv_type_base + s->b8_stride + 1;

  5204.     v->mv_f_base        = av_mallocz(2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5205.     v->mv_f[0]          = v->mv_f_base + s->b8_stride + 1;

  5206.     v->mv_f[1]          = v->mv_f[0] + (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  5207.     v->mv_f_last_base   = av_mallocz(2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5208.     v->mv_f_last[0]     = v->mv_f_last_base + s->b8_stride + 1;

  5209.     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);

  5210.     v->mv_f_next_base   = av_mallocz(2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5211.     v->mv_f_next[0]     = v->mv_f_next_base + s->b8_stride + 1;

  5212.     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);

  5213. 

  5214.     /* Init coded blocks info */

  5215.     if (v->profile == PROFILE_ADVANCED) {

  5216. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  5217. //            return -1;

  5218. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  5219. //            return -1;

  5220.     }

  5221. 

  5222.     ff_intrax8_common_init(&v->x8,s);

  5223. 

  5224.     if (s->avctx->codec_id == CODEC_ID_WMV3IMAGE || s->avctx->codec_id == CODEC_ID_VC1IMAGE) {

  5225.         for (i = 0; i < 4; i++)

  5226.             if (!(v->sr_rows[i >> 1][i & 1] = av_malloc(v->output_width))) return -1;

  5227.     }

  5228. 

  5229.     if (!v->mv_type_mb_plane || !v->direct_mb_plane || !v->acpred_plane || !v->over_flags_plane ||

  5230.         !v->block || !v->cbp_base || !v->ttblk_base || !v->is_intra_base || !v->luma_mv_base ||

  5231.         !v->mb_type_base)

  5232.             return -1;

  5233. 

  5234.     return 0;

  5235. }

  5236. 

  5237. /** Initialize a VC1/WMV3 decoder

  5238.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  5239.  * @todo TODO: Decypher remaining bits in extra_data

  5240.  */

  5241. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  5242. {

  5243.     VC1Context *v = avctx->priv_data;

  5244.     MpegEncContext *s = &v->s;

  5245.     GetBitContext gb;

  5246.     int i;

  5247. 

  5248.     /* save the container output size for WMImage */

  5249.     v->output_width  = avctx->width;

  5250.     v->output_height = avctx->height;

  5251. 

  5252.     if (!avctx->extradata_size || !avctx->extradata)

  5253.         return -1;

  5254.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  5255.         avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);

  5256.     else

  5257.         avctx->pix_fmt = PIX_FMT_GRAY8;

  5258.     avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);

  5259.     v->s.avctx = avctx;

  5260.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  5261.     v->s.flags   |= CODEC_FLAG_EMU_EDGE;

  5262. 

  5263.     if (avctx->idct_algo == FF_IDCT_AUTO) {

  5264.         avctx->idct_algo = FF_IDCT_WMV2;

  5265.     }

  5266. 

  5267.     if (vc1_init_common(v) < 0)

  5268.         return -1;

  5269.     ff_vc1dsp_init(&v->vc1dsp);

  5270. 

  5271.     if (avctx->codec_id == CODEC_ID_WMV3 || avctx->codec_id == CODEC_ID_WMV3IMAGE) {

  5272.         int count = 0;

  5273. 

  5274.         // looks like WMV3 has a sequence header stored in the extradata

  5275.         // advanced sequence header may be before the first frame

  5276.         // the last byte of the extradata is a version number, 1 for the

  5277.         // samples we can decode

  5278. 

  5279.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  5280. 

  5281.         if (vc1_decode_sequence_header(avctx, v, &gb) < 0)

  5282.           return -1;

  5283. 

  5284.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  5285.         if (count > 0) {

  5286.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  5287.                    count, get_bits(&gb, count));

  5288.         } else if (count < 0) {

  5289.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  5290.         }

  5291.     } else { // VC1/WVC1/WVP2

  5292.         const uint8_t *start = avctx->extradata;

  5293.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  5294.         const uint8_t *next;

  5295.         int size, buf2_size;

  5296.         uint8_t *buf2 = NULL;

  5297.         int seq_initialized = 0, ep_initialized = 0;

  5298. 

  5299.         if (avctx->extradata_size < 16) {

  5300.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  5301.             return -1;

  5302.         }

  5303. 

  5304.         buf2  = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5305.         start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv

  5306.         next  = start;

  5307.         for (; next < end; start = next) {

  5308.             next = find_next_marker(start + 4, end);

  5309.             size = next - start - 4;

  5310.             if (size <= 0)

  5311.                 continue;

  5312.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  5313.             init_get_bits(&gb, buf2, buf2_size * 8);

  5314.             switch (AV_RB32(start)) {

  5315.             case VC1_CODE_SEQHDR:

  5316.                 if (vc1_decode_sequence_header(avctx, v, &gb) < 0) {

  5317.                     av_free(buf2);

  5318.                     return -1;

  5319.                 }

  5320.                 seq_initialized = 1;

  5321.                 break;

  5322.             case VC1_CODE_ENTRYPOINT:

  5323.                 if (vc1_decode_entry_point(avctx, v, &gb) < 0) {

  5324.                     av_free(buf2);

  5325.                     return -1;

  5326.                 }

  5327.                 ep_initialized = 1;

  5328.                 break;

  5329.             }

  5330.         }

  5331.         av_free(buf2);

  5332.         if (!seq_initialized || !ep_initialized) {

  5333.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  5334.             return -1;

  5335.         }

  5336.         v->res_sprite = (avctx->codec_tag == MKTAG('W','V','P','2'));

  5337.     }

  5338. 

  5339.     avctx->profile = v->profile;

  5340.     if (v->profile == PROFILE_ADVANCED)

  5341.         avctx->level = v->level;

  5342. 

  5343.     avctx->has_b_frames = !!(avctx->max_b_frames);

  5344. 

  5345.     s->mb_width  = (avctx->coded_width  + 15) >> 4;

  5346.     s->mb_height = (avctx->coded_height + 15) >> 4;

  5347. 

  5348.     if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {

  5349.         for (i = 0; i < 64; i++) {

  5350. #define transpose(x) ((x >> 3) | ((x & 7) << 3))

  5351.             v->zz_8x8[0][i] = transpose(wmv1_scantable[0][i]);

  5352.             v->zz_8x8[1][i] = transpose(wmv1_scantable[1][i]);

  5353.             v->zz_8x8[2][i] = transpose(wmv1_scantable[2][i]);

  5354.             v->zz_8x8[3][i] = transpose(wmv1_scantable[3][i]);

  5355.             v->zzi_8x8[i] = transpose(ff_vc1_adv_interlaced_8x8_zz[i]);

  5356.         }

  5357.         v->left_blk_sh = 0;

  5358.         v->top_blk_sh  = 3;

  5359.     } else {

  5360.         memcpy(v->zz_8x8, wmv1_scantable, 4*64);

  5361.         v->left_blk_sh = 3;

  5362.         v->top_blk_sh  = 0;

  5363.     }

  5364. 

  5365.     if (avctx->codec_id == CODEC_ID_WMV3IMAGE || avctx->codec_id == CODEC_ID_VC1IMAGE) {

  5366.         v->sprite_width  = avctx->coded_width;

  5367.         v->sprite_height = avctx->coded_height;

  5368. 

  5369.         avctx->coded_width  = avctx->width  = v->output_width;

  5370.         avctx->coded_height = avctx->height = v->output_height;

  5371. 

  5372.         // prevent 16.16 overflows

  5373.         if (v->sprite_width  > 1 << 14 ||

  5374.             v->sprite_height > 1 << 14 ||

  5375.             v->output_width  > 1 << 14 ||

  5376.             v->output_height > 1 << 14) return -1;

  5377.     }

  5378.     return 0;

  5379. }

  5380. 

  5381. /** Close a VC1/WMV3 decoder

  5382.  * @warning Initial try at using MpegEncContext stuff

  5383.  */

  5384. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  5385. {

  5386.     VC1Context *v = avctx->priv_data;

  5387.     int i;

  5388. 

  5389.     if ((avctx->codec_id == CODEC_ID_WMV3IMAGE || avctx->codec_id == CODEC_ID_VC1IMAGE)

  5390.         && v->sprite_output_frame.data[0])

  5391.         avctx->release_buffer(avctx, &v->sprite_output_frame);

  5392.     for (i = 0; i < 4; i++)

  5393.         av_freep(&v->sr_rows[i >> 1][i & 1]);

  5394.     av_freep(&v->hrd_rate);

  5395.     av_freep(&v->hrd_buffer);

  5396.     MPV_common_end(&v->s);

  5397.     av_freep(&v->mv_type_mb_plane);

  5398.     av_freep(&v->direct_mb_plane);

  5399.     av_freep(&v->forward_mb_plane);

  5400.     av_freep(&v->fieldtx_plane);

  5401.     av_freep(&v->acpred_plane);

  5402.     av_freep(&v->over_flags_plane);

  5403.     av_freep(&v->mb_type_base);

  5404.     av_freep(&v->blk_mv_type_base);

  5405.     av_freep(&v->mv_f_base);

  5406.     av_freep(&v->mv_f_last_base);

  5407.     av_freep(&v->mv_f_next_base);

  5408.     av_freep(&v->block);

  5409.     av_freep(&v->cbp_base);

  5410.     av_freep(&v->ttblk_base);

  5411.     av_freep(&v->is_intra_base); // FIXME use v->mb_type[]

  5412.     av_freep(&v->luma_mv_base);

  5413.     ff_intrax8_common_end(&v->x8);

  5414.     return 0;

  5415. }

  5416. 

  5417. 

  5418. /** Decode a VC1/WMV3 frame

  5419.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  5420.  */

  5421. static int vc1_decode_frame(AVCodecContext *avctx, void *data,

  5422.                             int *data_size, AVPacket *avpkt)

  5423. {

  5424.     const uint8_t *buf = avpkt->data;

  5425.     int buf_size = avpkt->size, n_slices = 0, i;

  5426.     VC1Context *v = avctx->priv_data;

  5427.     MpegEncContext *s = &v->s;

  5428.     AVFrame *pict = data;

  5429.     uint8_t *buf2 = NULL;

  5430.     uint8_t *buf_field2 = NULL;

  5431.     const uint8_t *buf_start = buf;

  5432.     int mb_height, n_slices1;

  5433.     struct {

  5434.         uint8_t *buf;

  5435.         GetBitContext gb;

  5436.         int mby_start;

  5437.     } *slices = NULL;

  5438. 

  5439.     /* no supplementary picture */

  5440.     if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == VC1_CODE_ENDOFSEQ)) {

  5441.         /* special case for last picture */

  5442.         if (s->low_delay == 0 && s->next_picture_ptr) {

  5443.             *pict = *(AVFrame*)s->next_picture_ptr;

  5444.             s->next_picture_ptr = NULL;

  5445. 

  5446.             *data_size = sizeof(AVFrame);

  5447.         }

  5448. 

  5449.         return 0;

  5450.     }

  5451. 

  5452.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) {

  5453.         if (v->profile < PROFILE_ADVANCED)

  5454.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  5455.         else

  5456.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  5457.     }

  5458. 

  5459.     //for advanced profile we may need to parse and unescape data

  5460.     if (avctx->codec_id == CODEC_ID_VC1 || avctx->codec_id == CODEC_ID_VC1IMAGE) {

  5461.         int buf_size2 = 0;

  5462.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5463. 

  5464.         if (IS_MARKER(AV_RB32(buf))) { /* frame starts with marker and needs to be parsed */

  5465.             const uint8_t *start, *end, *next;

  5466.             int size;

  5467. 

  5468.             next = buf;

  5469.             for (start = buf, end = buf + buf_size; next < end; start = next) {

  5470.                 next = find_next_marker(start + 4, end);

  5471.                 size = next - start - 4;

  5472.                 if (size <= 0) continue;

  5473.                 switch (AV_RB32(start)) {

  5474.                 case VC1_CODE_FRAME:

  5475.                     if (avctx->hwaccel ||

  5476.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  5477.                         buf_start = start;

  5478.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  5479.                     break;

  5480.                 case VC1_CODE_FIELD: {

  5481.                     int buf_size3;

  5482.                     slices = av_realloc(slices, sizeof(*slices) * (n_slices+1));

  5483.                     if (!slices)

  5484.                         goto err;

  5485.                     slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5486.                     if (!slices[n_slices].buf)

  5487.                         goto err;

  5488.                     buf_size3 = vc1_unescape_buffer(start + 4, size,

  5489.                                                     slices[n_slices].buf);

  5490.                     init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5491.                                   buf_size3 << 3);

  5492.                     /* assuming that the field marker is at the exact middle,

  5493.                        hope it's correct */

  5494.                     slices[n_slices].mby_start = s->mb_height >> 1;

  5495.                     n_slices1 = n_slices - 1; // index of the last slice of the first field

  5496.                     n_slices++;

  5497.                     // not necessary, ad hoc until I find a way to handle WVC1i

  5498.                     buf_field2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5499.                     vc1_unescape_buffer(start + 4, size, buf_field2);

  5500.                     break;

  5501.                 }

  5502.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  5503.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  5504.                     init_get_bits(&s->gb, buf2, buf_size2 * 8);

  5505.                     vc1_decode_entry_point(avctx, v, &s->gb);

  5506.                     break;

  5507.                 case VC1_CODE_SLICE: {

  5508.                     int buf_size3;

  5509.                     slices = av_realloc(slices, sizeof(*slices) * (n_slices+1));

  5510.                     if (!slices)

  5511.                         goto err;

  5512.                     slices[n_slices].buf = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5513.                     if (!slices[n_slices].buf)

  5514.                         goto err;

  5515.                     buf_size3 = vc1_unescape_buffer(start + 4, size,

  5516.                                                     slices[n_slices].buf);

  5517.                     init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,

  5518.                                   buf_size3 << 3);

  5519.                     slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);

  5520.                     n_slices++;

  5521.                     break;

  5522.                 }

  5523.                 }

  5524.             }

  5525.         } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */

  5526.             const uint8_t *divider;

  5527. 

  5528.             divider = find_next_marker(buf, buf + buf_size);

  5529.             if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {

  5530.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  5531.                 goto err;

  5532.             } else { // found field marker, unescape second field

  5533.                 buf_field2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  5534.                 vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, buf_field2);

  5535.             }

  5536.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  5537.         } else {

  5538.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  5539.         }

  5540.         init_get_bits(&s->gb, buf2, buf_size2*8);

  5541.     } else

  5542.         init_get_bits(&s->gb, buf, buf_size*8);

  5543. 

  5544.     if (v->res_sprite) {

  5545.         v->new_sprite  = !get_bits1(&s->gb);

  5546.         v->two_sprites =  get_bits1(&s->gb);

  5547.         /* res_sprite means a Windows Media Image stream, CODEC_ID_*IMAGE means

  5548.            we're using the sprite compositor. These are intentionally kept separate

  5549.            so you can get the raw sprites by using the wmv3 decoder for WMVP or

  5550.            the vc1 one for WVP2 */

  5551.         if (avctx->codec_id == CODEC_ID_WMV3IMAGE || avctx->codec_id == CODEC_ID_VC1IMAGE) {

  5552.             if (v->new_sprite) {

  5553.                 // switch AVCodecContext parameters to those of the sprites

  5554.                 avctx->width  = avctx->coded_width  = v->sprite_width;

  5555.                 avctx->height = avctx->coded_height = v->sprite_height;

  5556.             } else {

  5557.                 goto image;

  5558.             }

  5559.         }

  5560.     }

  5561. 

  5562.     if (s->context_initialized &&

  5563.         (s->width  != avctx->coded_width ||

  5564.          s->height != avctx->coded_height)) {

  5565.         vc1_decode_end(avctx);

  5566.     }

  5567. 

  5568.     if (!s->context_initialized) {

  5569.         if (ff_msmpeg4_decode_init(avctx) < 0 || vc1_decode_init_alloc_tables(v) < 0)

  5570.             return -1;

  5571. 

  5572.         s->low_delay = !avctx->has_b_frames || v->res_sprite;

  5573. 

  5574.         if (v->profile == PROFILE_ADVANCED) {

  5575.             s->h_edge_pos = avctx->coded_width;

  5576.             s->v_edge_pos = avctx->coded_height;

  5577.         }

  5578.     }

  5579. 

  5580.     /* We need to set current_picture_ptr before reading the header,

  5581.      * otherwise we cannot store anything in there. */

  5582.     if (s->current_picture_ptr == NULL || s->current_picture_ptr->f.data[0]) {

  5583.         int i = ff_find_unused_picture(s, 0);

  5584.         s->current_picture_ptr = &s->picture[i];

  5585.     }

  5586. 

  5587.     // do parse frame header

  5588.     v->pic_header_flag = 0;

  5589.     if (v->profile < PROFILE_ADVANCED) {

  5590.         if (vc1_parse_frame_header(v, &s->gb) == -1) {

  5591.             goto err;

  5592.         }

  5593.     } else {

  5594.         if (vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  5595.             goto err;

  5596.         }

  5597.     }

  5598. 

  5599.     if ((avctx->codec_id == CODEC_ID_WMV3IMAGE || avctx->codec_id == CODEC_ID_VC1IMAGE)

  5600.         && s->pict_type != AV_PICTURE_TYPE_I) {

  5601.         av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");

  5602.         goto err;

  5603.     }

  5604. 

  5605.     // process pulldown flags

  5606.     s->current_picture_ptr->f.repeat_pict = 0;

  5607.     // Pulldown flags are only valid when 'broadcast' has been set.

  5608.     // So ticks_per_frame will be 2

  5609.     if (v->rff) {

  5610.         // repeat field

  5611.         s->current_picture_ptr->f.repeat_pict = 1;

  5612.     } else if (v->rptfrm) {

  5613.         // repeat frames

  5614.         s->current_picture_ptr->f.repeat_pict = v->rptfrm * 2;

  5615.     }

  5616. 

  5617.     // for skipping the frame

  5618.     s->current_picture.f.pict_type = s->pict_type;

  5619.     s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;

  5620. 

  5621.     /* skip B-frames if we don't have reference frames */

  5622.     if (s->last_picture_ptr == NULL && (s->pict_type == AV_PICTURE_TYPE_B || s->dropable)) {

  5623.         goto err;

  5624.     }

  5625.     if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||

  5626.         (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) ||

  5627.          avctx->skip_frame >= AVDISCARD_ALL) {

  5628.         goto end;

  5629.     }

  5630. 

  5631.     if (s->next_p_frame_damaged) {

  5632.         if (s->pict_type == AV_PICTURE_TYPE_B)

  5633.             goto end;

  5634.         else

  5635.             s->next_p_frame_damaged = 0;

  5636.     }

  5637. 

  5638.     if (MPV_frame_start(s, avctx) < 0) {

  5639.         goto err;

  5640.     }

  5641. 

  5642.     s->me.qpel_put = s->dsp.put_qpel_pixels_tab;

  5643.     s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;

  5644. 

  5645.     if ((CONFIG_VC1_VDPAU_DECODER)

  5646.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  5647.         ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  5648.     else if (avctx->hwaccel) {

  5649.         if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)

  5650.             goto err;

  5651.         if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  5652.             goto err;

  5653.         if (avctx->hwaccel->end_frame(avctx) < 0)

  5654.             goto err;

  5655.     } else {

  5656.         ff_er_frame_start(s);

  5657. 

  5658.         v->bits = buf_size * 8;

  5659.         if (v->field_mode) {

  5660.             uint8_t *tmp[2];

  5661.             s->current_picture.f.linesize[0] <<= 1;

  5662.             s->current_picture.f.linesize[1] <<= 1;

  5663.             s->current_picture.f.linesize[2] <<= 1;

  5664.             s->linesize                      <<= 1;

  5665.             s->uvlinesize                    <<= 1;

  5666.             tmp[0]          = v->mv_f_last[0];

  5667.             tmp[1]          = v->mv_f_last[1];

  5668.             v->mv_f_last[0] = v->mv_f_next[0];

  5669.             v->mv_f_last[1] = v->mv_f_next[1];

  5670.             v->mv_f_next[0] = v->mv_f[0];

  5671.             v->mv_f_next[1] = v->mv_f[1];

  5672.             v->mv_f[0] = tmp[0];

  5673.             v->mv_f[1] = tmp[1];

  5674.         }

  5675.         mb_height = s->mb_height >> v->field_mode;

  5676.         for (i = 0; i <= n_slices; i++) {

  5677.             if (i > 0 &&  slices[i - 1].mby_start >= mb_height) {

  5678.                 v->second_field = 1;

  5679.                 v->blocks_off   = s->mb_width  * s->mb_height << 1;

  5680.                 v->mb_off       = s->mb_stride * s->mb_height >> 1;

  5681.             } else {

  5682.                 v->second_field = 0;

  5683.                 v->blocks_off   = 0;

  5684.                 v->mb_off       = 0;

  5685.             }

  5686.             if (i) {

  5687.                 v->pic_header_flag = 0;

  5688.                 if (v->field_mode && i == n_slices1 + 2)

  5689.                     vc1_parse_frame_header_adv(v, &s->gb);

  5690.                 else if (get_bits1(&s->gb)) {

  5691.                     v->pic_header_flag = 1;

  5692.                     vc1_parse_frame_header_adv(v, &s->gb);

  5693.                 }

  5694.             }

  5695.             s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);

  5696.             if (!v->field_mode || v->second_field)

  5697.                 s->end_mb_y = (i == n_slices     ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);

  5698.             else

  5699.                 s->end_mb_y = (i == n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);

  5700.             vc1_decode_blocks(v);

  5701.             if (i != n_slices)

  5702.                 s->gb = slices[i].gb;

  5703.         }

  5704.         if (v->field_mode) {

  5705.             av_free(buf_field2);

  5706.             v->second_field = 0;

  5707.         }

  5708.         if (v->field_mode) {

  5709.             if (s->pict_type == AV_PICTURE_TYPE_B) {

  5710.                 memcpy(v->mv_f_base, v->mv_f_next_base,

  5711.                        2 * (s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2));

  5712.             }

  5713.             s->current_picture.f.linesize[0] >>= 1;

  5714.             s->current_picture.f.linesize[1] >>= 1;

  5715.             s->current_picture.f.linesize[2] >>= 1;

  5716.             s->linesize                      >>= 1;

  5717.             s->uvlinesize                    >>= 1;

  5718.         }

  5719. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), s->gb.size_in_bits);

  5720. //  if (get_bits_count(&s->gb) > buf_size * 8)

  5721. //      return -1;

  5722.         ff_er_frame_end(s);

  5723.     }

  5724. 

  5725.     MPV_frame_end(s);

  5726. 

  5727.     if (avctx->codec_id == CODEC_ID_WMV3IMAGE || avctx->codec_id == CODEC_ID_VC1IMAGE) {

  5728. image:

  5729.         avctx->width  = avctx->coded_width  = v->output_width;

  5730.         avctx->height = avctx->coded_height = v->output_height;

  5731.         if (avctx->skip_frame >= AVDISCARD_NONREF)

  5732.             goto end;

  5733. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  5734.         if (vc1_decode_sprites(v, &s->gb))

  5735.             goto err;

  5736. #endif

  5737.         *pict      = v->sprite_output_frame;

  5738.         *data_size = sizeof(AVFrame);

  5739.     } else {

  5740.         if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {

  5741.             *pict = *(AVFrame*)s->current_picture_ptr;

  5742.         } else if (s->last_picture_ptr != NULL) {

  5743.             *pict = *(AVFrame*)s->last_picture_ptr;

  5744.         }

  5745.         if (s->last_picture_ptr || s->low_delay) {

  5746.             *data_size = sizeof(AVFrame);

  5747.             ff_print_debug_info(s, pict);

  5748.         }

  5749.     }

  5750. 

  5751. end:

  5752.     av_free(buf2);

  5753.     for (i = 0; i < n_slices; i++)

  5754.         av_free(slices[i].buf);

  5755.     av_free(slices);

  5756.     return buf_size;

  5757. 

  5758. err:

  5759.     av_free(buf2);

  5760.     for (i = 0; i < n_slices; i++)

  5761.         av_free(slices[i].buf);

  5762.     av_free(slices);

  5763.     av_free(buf_field2);

  5764.     return -1;

  5765. }

  5766. 

  5767. 

  5768. static const AVProfile profiles[] = {

  5769.     { FF_PROFILE_VC1_SIMPLE,   "Simple"   },

  5770.     { FF_PROFILE_VC1_MAIN,     "Main"     },

  5771.     { FF_PROFILE_VC1_COMPLEX,  "Complex"  },

  5772.     { FF_PROFILE_VC1_ADVANCED, "Advanced" },

  5773.     { FF_PROFILE_UNKNOWN },

  5774. };

  5775. 

  5776. AVCodec ff_vc1_decoder = {

  5777.     .name           = "vc1",

  5778.     .type           = AVMEDIA_TYPE_VIDEO,

  5779.     .id             = CODEC_ID_VC1,

  5780.     .priv_data_size = sizeof(VC1Context),

  5781.     .init           = vc1_decode_init,

  5782.     .close          = vc1_decode_end,

  5783.     .decode         = vc1_decode_frame,

  5784.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  5785.     .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  5786.     .pix_fmts       = ff_hwaccel_pixfmt_list_420,

  5787.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5788. };

  5789. 

  5790. #if CONFIG_WMV3_DECODER

  5791. AVCodec ff_wmv3_decoder = {

  5792.     .name           = "wmv3",

  5793.     .type           = AVMEDIA_TYPE_VIDEO,

  5794.     .id             = CODEC_ID_WMV3,

  5795.     .priv_data_size = sizeof(VC1Context),

  5796.     .init           = vc1_decode_init,

  5797.     .close          = vc1_decode_end,

  5798.     .decode         = vc1_decode_frame,

  5799.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  5800.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  5801.     .pix_fmts       = ff_hwaccel_pixfmt_list_420,

  5802.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5803. };

  5804. #endif

  5805. 

  5806. #if CONFIG_WMV3_VDPAU_DECODER

  5807. AVCodec ff_wmv3_vdpau_decoder = {

  5808.     .name           = "wmv3_vdpau",

  5809.     .type           = AVMEDIA_TYPE_VIDEO,

  5810.     .id             = CODEC_ID_WMV3,

  5811.     .priv_data_size = sizeof(VC1Context),

  5812.     .init           = vc1_decode_init,

  5813.     .close          = vc1_decode_end,

  5814.     .decode         = vc1_decode_frame,

  5815.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  5816.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  5817.     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_VDPAU_WMV3, PIX_FMT_NONE},

  5818.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5819. };

  5820. #endif

  5821. 

  5822. #if CONFIG_VC1_VDPAU_DECODER

  5823. AVCodec ff_vc1_vdpau_decoder = {

  5824.     .name           = "vc1_vdpau",

  5825.     .type           = AVMEDIA_TYPE_VIDEO,

  5826.     .id             = CODEC_ID_VC1,

  5827.     .priv_data_size = sizeof(VC1Context),

  5828.     .init           = vc1_decode_init,

  5829.     .close          = vc1_decode_end,

  5830.     .decode         = vc1_decode_frame,

  5831.     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  5832.     .long_name      = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  5833.     .pix_fmts       = (const enum PixelFormat[]){PIX_FMT_VDPAU_VC1, PIX_FMT_NONE},

  5834.     .profiles       = NULL_IF_CONFIG_SMALL(profiles)

  5835. };

  5836. #endif

  5837. 

  5838. #if CONFIG_WMV3IMAGE_DECODER

  5839. AVCodec ff_wmv3image_decoder = {

  5840.     .name           = "wmv3image",

  5841.     .type           = AVMEDIA_TYPE_VIDEO,

  5842.     .id             = CODEC_ID_WMV3IMAGE,

  5843.     .priv_data_size = sizeof(VC1Context),

  5844.     .init           = vc1_decode_init,

  5845.     .close          = vc1_decode_end,

  5846.     .decode         = vc1_decode_frame,

  5847.     .capabilities   = CODEC_CAP_DR1,

  5848.     .flush          = vc1_sprite_flush,

  5849.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),

  5850.     .pix_fmts       = ff_pixfmt_list_420

  5851. };

  5852. #endif

  5853. 

  5854. #if CONFIG_VC1IMAGE_DECODER

  5855. AVCodec ff_vc1image_decoder = {

  5856.     .name           = "vc1image",

  5857.     .type           = AVMEDIA_TYPE_VIDEO,

  5858.     .id             = CODEC_ID_VC1IMAGE,

  5859.     .priv_data_size = sizeof(VC1Context),

  5860.     .init           = vc1_decode_init,

  5861.     .close          = vc1_decode_end,

  5862.     .decode         = vc1_decode_frame,

  5863.     .capabilities   = CODEC_CAP_DR1,

  5864.     .flush          = vc1_sprite_flush,

  5865.     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),

  5866.     .pix_fmts       = ff_pixfmt_list_420

  5867. };

  5868. #endif