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FFmpeg/libavcodec/vc1.c

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  1. /*

  2.  * VC-1 and WMV3 decoder

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

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file libavcodec/vc1.c

  25.  * VC-1 and WMV3 decoder

  26.  *

  27.  */

  28. #include "internal.h"

  29. #include "dsputil.h"

  30. #include "avcodec.h"

  31. #include "mpegvideo.h"

  32. #include "vc1.h"

  33. #include "vc1data.h"

  34. #include "vc1acdata.h"

  35. #include "msmpeg4data.h"

  36. #include "unary.h"

  37. #include "simple_idct.h"

  38. #include "mathops.h"

  39. #include "vdpau_internal.h"

  40. 

  41. #undef NDEBUG

  42. #include <assert.h>

  43. 

  44. #define MB_INTRA_VLC_BITS 9

  45. #define DC_VLC_BITS 9

  46. #define AC_VLC_BITS 9

  47. static const uint16_t table_mb_intra[64][2];

  48. 

  49. 

  50. static const uint16_t vlc_offs[] = {

  51.        0,   520,   552,   616,  1128,  1160, 1224, 1740, 1772, 1836, 1900, 2436,

  52.     2986,  3050,  3610,  4154,  4218,  4746, 5326, 5390, 5902, 6554, 7658, 8620,

  53.     9262, 10202, 10756, 11310, 12228, 15078

  54. };

  55. 

  56. /**

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

  58.  * @param v The VC1Context to initialize

  59.  * @return Status

  60.  */

  61. static int vc1_init_common(VC1Context *v)

  62. {

  63.     static int done = 0;

  64.     int i = 0;

  65.     static VLC_TYPE vlc_table[15078][2];

  66. 

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

  68. 

  69.     /* VLC tables */

  70.     if(!done)

  71.     {

  72.         INIT_VLC_STATIC(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  73.                  ff_vc1_bfraction_bits, 1, 1,

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

  75.         INIT_VLC_STATIC(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  76.                  ff_vc1_norm2_bits, 1, 1,

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

  78.         INIT_VLC_STATIC(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  79.                  ff_vc1_norm6_bits, 1, 1,

  80.                  ff_vc1_norm6_codes, 2, 2, 556);

  81.         INIT_VLC_STATIC(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  82.                  ff_vc1_imode_bits, 1, 1,

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

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

  85.         {

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

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

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

  89.                      ff_vc1_ttmb_bits[i], 1, 1,

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

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

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

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

  94.                      ff_vc1_ttblk_bits[i], 1, 1,

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

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

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

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

  99.                      ff_vc1_subblkpat_bits[i], 1, 1,

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

  101.         }

  102.         for(i=0; i<4; i++)

  103.         {

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

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

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

  107.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

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

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

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

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

  112.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

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

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

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

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

  117.                      ff_vc1_mv_diff_bits[i], 1, 1,

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

  119.         }

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

  121.             ff_vc1_ac_coeff_table[i].table = &vlc_table[vlc_offs[i+21]];

  122.             ff_vc1_ac_coeff_table[i].table_allocated = vlc_offs[i+22] - vlc_offs[i+21];

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

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

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

  126.         }

  127.         //FIXME: switching to INIT_VLC_STATIC() results in incorrect decoding

  128.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

  129.                  &ff_msmp4_mb_i_table[0][1], 4, 2,

  130.                  &ff_msmp4_mb_i_table[0][0], 4, 2, INIT_VLC_USE_STATIC);

  131.         done = 1;

  132.     }

  133. 

  134.     /* Other defaults */

  135.     v->pq = -1;

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

  137. 

  138.     return 0;

  139. }

  140. 

  141. /***********************************************************************/

  142. /**

  143.  * @defgroup vc1bitplane VC-1 Bitplane decoding

  144.  * @see 8.7, p56

  145.  * @{

  146.  */

  147. 

  148. /**

  149.  * Imode types

  150.  * @{

  151.  */

  152. enum Imode {

  153.     IMODE_RAW,

  154.     IMODE_NORM2,

  155.     IMODE_DIFF2,

  156.     IMODE_NORM6,

  157.     IMODE_DIFF6,

  158.     IMODE_ROWSKIP,

  159.     IMODE_COLSKIP

  160. };

  161. /** @} */ //imode defines

  162. 

  163. /** Decode rows by checking if they are skipped

  164.  * @param plane Buffer to store decoded bits

  165.  * @param[in] width Width of this buffer

  166.  * @param[in] height Height of this buffer

  167.  * @param[in] stride of this buffer

  168.  */

  169. static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){

  170.     int x, y;

  171. 

  172.     for (y=0; y<height; y++){

  173.         if (!get_bits1(gb)) //rowskip

  174.             memset(plane, 0, width);

  175.         else

  176.             for (x=0; x<width; x++)

  177.                 plane[x] = get_bits1(gb);

  178.         plane += stride;

  179.     }

  180. }

  181. 

  182. /** Decode columns by checking if they are skipped

  183.  * @param plane Buffer to store decoded bits

  184.  * @param[in] width Width of this buffer

  185.  * @param[in] height Height of this buffer

  186.  * @param[in] stride of this buffer

  187.  * @todo FIXME: Optimize

  188.  */

  189. static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){

  190.     int x, y;

  191. 

  192.     for (x=0; x<width; x++){

  193.         if (!get_bits1(gb)) //colskip

  194.             for (y=0; y<height; y++)

  195.                 plane[y*stride] = 0;

  196.         else

  197.             for (y=0; y<height; y++)

  198.                 plane[y*stride] = get_bits1(gb);

  199.         plane ++;

  200.     }

  201. }

  202. 

  203. /** Decode a bitplane's bits

  204.  * @param data bitplane where to store the decode bits

  205.  * @param[out] raw_flag pointer to the flag indicating that this bitplane is not coded explicitly

  206.  * @param v VC-1 context for bit reading and logging

  207.  * @return Status

  208.  * @todo FIXME: Optimize

  209.  */

  210. static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)

  211. {

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

  213. 

  214.     int imode, x, y, code, offset;

  215.     uint8_t invert, *planep = data;

  216.     int width, height, stride;

  217. 

  218.     width = v->s.mb_width;

  219.     height = v->s.mb_height;

  220.     stride = v->s.mb_stride;

  221.     invert = get_bits1(gb);

  222.     imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);

  223. 

  224.     *raw_flag = 0;

  225.     switch (imode)

  226.     {

  227.     case IMODE_RAW:

  228.         //Data is actually read in the MB layer (same for all tests == "raw")

  229.         *raw_flag = 1; //invert ignored

  230.         return invert;

  231.     case IMODE_DIFF2:

  232.     case IMODE_NORM2:

  233.         if ((height * width) & 1)

  234.         {

  235.             *planep++ = get_bits1(gb);

  236.             offset = 1;

  237.         }

  238.         else offset = 0;

  239.         // decode bitplane as one long line

  240.         for (y = offset; y < height * width; y += 2) {

  241.             code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);

  242.             *planep++ = code & 1;

  243.             offset++;

  244.             if(offset == width) {

  245.                 offset = 0;

  246.                 planep += stride - width;

  247.             }

  248.             *planep++ = code >> 1;

  249.             offset++;

  250.             if(offset == width) {

  251.                 offset = 0;

  252.                 planep += stride - width;

  253.             }

  254.         }

  255.         break;

  256.     case IMODE_DIFF6:

  257.     case IMODE_NORM6:

  258.         if(!(height % 3) && (width % 3)) { // use 2x3 decoding

  259.             for(y = 0; y < height; y+= 3) {

  260.                 for(x = width & 1; x < width; x += 2) {

  261.                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);

  262.                     if(code < 0){

  263.                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");

  264.                         return -1;

  265.                     }

  266.                     planep[x + 0] = (code >> 0) & 1;

  267.                     planep[x + 1] = (code >> 1) & 1;

  268.                     planep[x + 0 + stride] = (code >> 2) & 1;

  269.                     planep[x + 1 + stride] = (code >> 3) & 1;

  270.                     planep[x + 0 + stride * 2] = (code >> 4) & 1;

  271.                     planep[x + 1 + stride * 2] = (code >> 5) & 1;

  272.                 }

  273.                 planep += stride * 3;

  274.             }

  275.             if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);

  276.         } else { // 3x2

  277.             planep += (height & 1) * stride;

  278.             for(y = height & 1; y < height; y += 2) {

  279.                 for(x = width % 3; x < width; x += 3) {

  280.                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);

  281.                     if(code < 0){

  282.                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");

  283.                         return -1;

  284.                     }

  285.                     planep[x + 0] = (code >> 0) & 1;

  286.                     planep[x + 1] = (code >> 1) & 1;

  287.                     planep[x + 2] = (code >> 2) & 1;

  288.                     planep[x + 0 + stride] = (code >> 3) & 1;

  289.                     planep[x + 1 + stride] = (code >> 4) & 1;

  290.                     planep[x + 2 + stride] = (code >> 5) & 1;

  291.                 }

  292.                 planep += stride * 2;

  293.             }

  294.             x = width % 3;

  295.             if(x) decode_colskip(data  ,             x, height    , stride, &v->s.gb);

  296.             if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);

  297.         }

  298.         break;

  299.     case IMODE_ROWSKIP:

  300.         decode_rowskip(data, width, height, stride, &v->s.gb);

  301.         break;

  302.     case IMODE_COLSKIP:

  303.         decode_colskip(data, width, height, stride, &v->s.gb);

  304.         break;

  305.     default: break;

  306.     }

  307. 

  308.     /* Applying diff operator */

  309.     if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)

  310.     {

  311.         planep = data;

  312.         planep[0] ^= invert;

  313.         for (x=1; x<width; x++)

  314.             planep[x] ^= planep[x-1];

  315.         for (y=1; y<height; y++)

  316.         {

  317.             planep += stride;

  318.             planep[0] ^= planep[-stride];

  319.             for (x=1; x<width; x++)

  320.             {

  321.                 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;

  322.                 else                                 planep[x] ^= planep[x-1];

  323.             }

  324.         }

  325.     }

  326.     else if (invert)

  327.     {

  328.         planep = data;

  329.         for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride

  330.     }

  331.     return (imode<<1) + invert;

  332. }

  333. 

  334. /** @} */ //Bitplane group

  335. 

  336. static void vc1_loop_filter_iblk(MpegEncContext *s, int pq)

  337. {

  338.     int i, j;

  339.     if(!s->first_slice_line)

  340.         s->dsp.vc1_v_loop_filter16(s->dest[0], s->linesize, pq);

  341.     s->dsp.vc1_v_loop_filter16(s->dest[0] + 8*s->linesize, s->linesize, pq);

  342.     for(i = !s->mb_x*8; i < 16; i += 8)

  343.         s->dsp.vc1_h_loop_filter16(s->dest[0] + i, s->linesize, pq);

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

  345.         if(!s->first_slice_line)

  346.             s->dsp.vc1_v_loop_filter8(s->dest[j+1], s->uvlinesize, pq);

  347.         if(s->mb_x)

  348.             s->dsp.vc1_h_loop_filter8(s->dest[j+1], s->uvlinesize, pq);

  349.     }

  350. }

  351. 

  352. /***********************************************************************/

  353. /** VOP Dquant decoding

  354.  * @param v VC-1 Context

  355.  */

  356. static int vop_dquant_decoding(VC1Context *v)

  357. {

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

  359.     int pqdiff;

  360. 

  361.     //variable size

  362.     if (v->dquant == 2)

  363.     {

  364.         pqdiff = get_bits(gb, 3);

  365.         if (pqdiff == 7) v->altpq = get_bits(gb, 5);

  366.         else v->altpq = v->pq + pqdiff + 1;

  367.     }

  368.     else

  369.     {

  370.         v->dquantfrm = get_bits1(gb);

  371.         if ( v->dquantfrm )

  372.         {

  373.             v->dqprofile = get_bits(gb, 2);

  374.             switch (v->dqprofile)

  375.             {

  376.             case DQPROFILE_SINGLE_EDGE:

  377.             case DQPROFILE_DOUBLE_EDGES:

  378.                 v->dqsbedge = get_bits(gb, 2);

  379.                 break;

  380.             case DQPROFILE_ALL_MBS:

  381.                 v->dqbilevel = get_bits1(gb);

  382.                 if(!v->dqbilevel)

  383.                     v->halfpq = 0;

  384.             default: break; //Forbidden ?

  385.             }

  386.             if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)

  387.             {

  388.                 pqdiff = get_bits(gb, 3);

  389.                 if (pqdiff == 7) v->altpq = get_bits(gb, 5);

  390.                 else v->altpq = v->pq + pqdiff + 1;

  391.             }

  392.         }

  393.     }

  394.     return 0;

  395. }

  396. 

  397. /** Put block onto picture

  398.  */

  399. static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])

  400. {

  401.     uint8_t *Y;

  402.     int ys, us, vs;

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

  404. 

  405.     if(v->rangeredfrm) {

  406.         int i, j, k;

  407.         for(k = 0; k < 6; k++)

  408.             for(j = 0; j < 8; j++)

  409.                 for(i = 0; i < 8; i++)

  410.                     block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;

  411. 

  412.     }

  413.     ys = v->s.current_picture.linesize[0];

  414.     us = v->s.current_picture.linesize[1];

  415.     vs = v->s.current_picture.linesize[2];

  416.     Y = v->s.dest[0];

  417. 

  418.     dsp->put_pixels_clamped(block[0], Y, ys);

  419.     dsp->put_pixels_clamped(block[1], Y + 8, ys);

  420.     Y += ys * 8;

  421.     dsp->put_pixels_clamped(block[2], Y, ys);

  422.     dsp->put_pixels_clamped(block[3], Y + 8, ys);

  423. 

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

  425.         dsp->put_pixels_clamped(block[4], v->s.dest[1], us);

  426.         dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);

  427.     }

  428. }

  429. 

  430. /** Do motion compensation over 1 macroblock

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

  432.  */

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

  434. {

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

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

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

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

  439. 

  440.     if(!v->s.last_picture.data[0])return;

  441. 

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

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

  444. 

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

  446.     if(s->pict_type == FF_P_TYPE) {

  447.         s->current_picture.motion_val[1][s->block_index[0]][0] = mx;

  448.         s->current_picture.motion_val[1][s->block_index[0]][1] = my;

  449.     }

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

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

  452.     if(v->fastuvmc) {

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

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

  455.     }

  456.     if(!dir) {

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

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

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

  460.     } else {

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

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

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

  464.     }

  465. 

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

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

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

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

  470. 

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

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

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

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

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

  476.     }else{

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

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

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

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

  481.     }

  482. 

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

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

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

  486. 

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

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

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

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

  491.     }

  492. 

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

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

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

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

  497. 

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

  499.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  500.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  501.         srcY = s->edge_emu_buffer;

  502.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

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

  504.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

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

  506.         srcU = uvbuf;

  507.         srcV = uvbuf + 16;

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

  509.         if(v->rangeredfrm) {

  510.             int i, j;

  511.             uint8_t *src, *src2;

  512. 

  513.             src = srcY;

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

  515.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  516.                 src += s->linesize;

  517.             }

  518.             src = srcU; src2 = srcV;

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

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

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

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

  523.                 }

  524.                 src += s->uvlinesize;

  525.                 src2 += s->uvlinesize;

  526.             }

  527.         }

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

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

  530.             int i, j;

  531.             uint8_t *src, *src2;

  532. 

  533.             src = srcY;

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

  535.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = v->luty[src[i]];

  536.                 src += s->linesize;

  537.             }

  538.             src = srcU; src2 = srcV;

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

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

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

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

  543.                 }

  544.                 src += s->uvlinesize;

  545.                 src2 += s->uvlinesize;

  546.             }

  547.         }

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

  549.     }

  550. 

  551.     if(s->mspel) {

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

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

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

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

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

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

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

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

  560. 

  561.         if(!v->rnd)

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

  563.         else

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

  565.     }

  566. 

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

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

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

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

  571.     if(!v->rnd){

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

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

  574.     }else{

  575.         dsp->put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  576.         dsp->put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  577.     }

  578. }

  579. 

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

  581.  */

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

  583. {

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

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

  586.     uint8_t *srcY;

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

  588.     int off;

  589. 

  590.     if(!v->s.last_picture.data[0])return;

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

  592.     my = s->mv[0][n][1];

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

  594. 

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

  596. 

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

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

  599. 

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

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

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

  603.     }else{

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

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

  606.     }

  607. 

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

  609. 

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

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

  612.        || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 8 - s->mspel*2){

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

  614.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 9+s->mspel*2, 9+s->mspel*2,

  615.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  616.         srcY = s->edge_emu_buffer;

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

  618.         if(v->rangeredfrm) {

  619.             int i, j;

  620.             uint8_t *src;

  621. 

  622.             src = srcY;

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

  624.                 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  625.                 src += s->linesize;

  626.             }

  627.         }

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

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

  630.             int i, j;

  631.             uint8_t *src;

  632. 

  633.             src = srcY;

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

  635.                 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = v->luty[src[i]];

  636.                 src += s->linesize;

  637.             }

  638.         }

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

  640.     }

  641. 

  642.     if(s->mspel) {

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

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

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

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

  647.         if(!v->rnd)

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

  649.         else

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

  651.     }

  652. }

  653. 

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

  655. {

  656.     if(a < b) {

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

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

  659.     } else {

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

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

  662.     }

  663. }

  664. 

  665. 

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

  667.  */

  668. static void vc1_mc_4mv_chroma(VC1Context *v)

  669. {

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

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

  672.     uint8_t *srcU, *srcV;

  673.     int uvmx, uvmy, uvsrc_x, uvsrc_y;

  674.     int i, idx, tx = 0, ty = 0;

  675.     int mvx[4], mvy[4], intra[4];

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

  677. 

  678.     if(!v->s.last_picture.data[0])return;

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

  680. 

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

  682.         mvx[i] = s->mv[0][i][0];

  683.         mvy[i] = s->mv[0][i][1];

  684.         intra[i] = v->mb_type[0][s->block_index[i]];

  685.     }

  686. 

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

  688.     idx = (intra[3] << 3) | (intra[2] << 2) | (intra[1] << 1) | intra[0];

  689.     if(!idx) { // all blocks are inter

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

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

  692.     } else if(count[idx] == 1) { // 3 inter blocks

  693.         switch(idx) {

  694.         case 0x1:

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

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

  697.             break;

  698.         case 0x2:

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

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

  701.             break;

  702.         case 0x4:

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

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

  705.             break;

  706.         case 0x8:

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

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

  709.             break;

  710.         }

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

  712.         int t1 = 0, t2 = 0;

  713.         for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}

  714.         for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}

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

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

  717.     } else {

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

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

  720.         return; //no need to do MC for inter blocks

  721.     }

  722. 

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

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

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

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

  727.     if(v->fastuvmc) {

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

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

  730.     }

  731. 

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

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

  734. 

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

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

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

  738.     }else{

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

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

  741.     }

  742. 

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

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

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

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

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

  748.         ff_emulated_edge_mc(s->edge_emu_buffer     , srcU, s->uvlinesize, 8+1, 8+1,

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

  750.         ff_emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize, 8+1, 8+1,

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

  752.         srcU = s->edge_emu_buffer;

  753.         srcV = s->edge_emu_buffer + 16;

  754. 

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

  756.         if(v->rangeredfrm) {

  757.             int i, j;

  758.             uint8_t *src, *src2;

  759. 

  760.             src = srcU; src2 = srcV;

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

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

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

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

  765.                 }

  766.                 src += s->uvlinesize;

  767.                 src2 += s->uvlinesize;

  768.             }

  769.         }

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

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

  772.             int i, j;

  773.             uint8_t *src, *src2;

  774. 

  775.             src = srcU; src2 = srcV;

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

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

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

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

  780.                 }

  781.                 src += s->uvlinesize;

  782.                 src2 += s->uvlinesize;

  783.             }

  784.         }

  785.     }

  786. 

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

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

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

  790.     if(!v->rnd){

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

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

  793.     }else{

  794.         dsp->put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  795.         dsp->put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  796.     }

  797. }

  798. 

  799. static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);

  800. 

  801. /**

  802.  * Decode Simple/Main Profiles sequence header

  803.  * @see Figure 7-8, p16-17

  804.  * @param avctx Codec context

  805.  * @param gb GetBit context initialized from Codec context extra_data

  806.  * @return Status

  807.  */

  808. int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)

  809. {

  810.     av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));

  811.     v->profile = get_bits(gb, 2);

  812.     if (v->profile == PROFILE_COMPLEX)

  813.     {

  814.         av_log(avctx, AV_LOG_ERROR, "WMV3 Complex Profile is not fully supported\n");

  815.     }

  816. 

  817.     if (v->profile == PROFILE_ADVANCED)

  818.     {

  819.         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;

  820.         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;

  821.         return decode_sequence_header_adv(v, gb);

  822.     }

  823.     else

  824.     {

  825.         v->zz_8x4 = wmv2_scantableA;

  826.         v->zz_4x8 = wmv2_scantableB;

  827.         v->res_sm = get_bits(gb, 2); //reserved

  828.         if (v->res_sm)

  829.         {

  830.             av_log(avctx, AV_LOG_ERROR,

  831.                    "Reserved RES_SM=%i is forbidden\n", v->res_sm);

  832.             return -1;

  833.         }

  834.     }

  835. 

  836.     // (fps-2)/4 (->30)

  837.     v->frmrtq_postproc = get_bits(gb, 3); //common

  838.     // (bitrate-32kbps)/64kbps

  839.     v->bitrtq_postproc = get_bits(gb, 5); //common

  840.     v->s.loop_filter = get_bits1(gb); //common

  841.     if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)

  842.     {

  843.         av_log(avctx, AV_LOG_ERROR,

  844.                "LOOPFILTER shell not be enabled in simple profile\n");

  845.     }

  846.     if(v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)

  847.         v->s.loop_filter = 0;

  848. 

  849.     v->res_x8 = get_bits1(gb); //reserved

  850.     v->multires = get_bits1(gb);

  851.     v->res_fasttx = get_bits1(gb);

  852.     if (!v->res_fasttx)

  853.     {

  854.         v->s.dsp.vc1_inv_trans_8x8 = ff_simple_idct;

  855.         v->s.dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;

  856.         v->s.dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;

  857.         v->s.dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;

  858.     }

  859. 

  860.     v->fastuvmc =  get_bits1(gb); //common

  861.     if (!v->profile && !v->fastuvmc)

  862.     {

  863.         av_log(avctx, AV_LOG_ERROR,

  864.                "FASTUVMC unavailable in Simple Profile\n");

  865.         return -1;

  866.     }

  867.     v->extended_mv =  get_bits1(gb); //common

  868.     if (!v->profile && v->extended_mv)

  869.     {

  870.         av_log(avctx, AV_LOG_ERROR,

  871.                "Extended MVs unavailable in Simple Profile\n");

  872.         return -1;

  873.     }

  874.     v->dquant =  get_bits(gb, 2); //common

  875.     v->vstransform =  get_bits1(gb); //common

  876. 

  877.     v->res_transtab = get_bits1(gb);

  878.     if (v->res_transtab)

  879.     {

  880.         av_log(avctx, AV_LOG_ERROR,

  881.                "1 for reserved RES_TRANSTAB is forbidden\n");

  882.         return -1;

  883.     }

  884. 

  885.     v->overlap = get_bits1(gb); //common

  886. 

  887.     v->s.resync_marker = get_bits1(gb);

  888.     v->rangered = get_bits1(gb);

  889.     if (v->rangered && v->profile == PROFILE_SIMPLE)

  890.     {

  891.         av_log(avctx, AV_LOG_INFO,

  892.                "RANGERED should be set to 0 in simple profile\n");

  893.     }

  894. 

  895.     v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common

  896.     v->quantizer_mode = get_bits(gb, 2); //common

  897. 

  898.     v->finterpflag = get_bits1(gb); //common

  899.     v->res_rtm_flag = get_bits1(gb); //reserved

  900.     if (!v->res_rtm_flag)

  901.     {

  902. //            av_log(avctx, AV_LOG_ERROR,

  903. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  904.         av_log(avctx, AV_LOG_ERROR,

  905.                "Old WMV3 version detected, only I-frames will be decoded\n");

  906.         //return -1;

  907.     }

  908.     //TODO: figure out what they mean (always 0x402F)

  909.     if(!v->res_fasttx) skip_bits(gb, 16);

  910.     av_log(avctx, AV_LOG_DEBUG,

  911.                "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"

  912.                "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"

  913.                "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"

  914.                "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",

  915.                v->profile, v->frmrtq_postproc, v->bitrtq_postproc,

  916.                v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,

  917.                v->rangered, v->vstransform, v->overlap, v->s.resync_marker,

  918.                v->dquant, v->quantizer_mode, avctx->max_b_frames

  919.                );

  920.     return 0;

  921. }

  922. 

  923. static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)

  924. {

  925.     v->res_rtm_flag = 1;

  926.     v->level = get_bits(gb, 3);

  927.     if(v->level >= 5)

  928.     {

  929.         av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);

  930.     }

  931.     v->chromaformat = get_bits(gb, 2);

  932.     if (v->chromaformat != 1)

  933.     {

  934.         av_log(v->s.avctx, AV_LOG_ERROR,

  935.                "Only 4:2:0 chroma format supported\n");

  936.         return -1;

  937.     }

  938. 

  939.     // (fps-2)/4 (->30)

  940.     v->frmrtq_postproc = get_bits(gb, 3); //common

  941.     // (bitrate-32kbps)/64kbps

  942.     v->bitrtq_postproc = get_bits(gb, 5); //common

  943.     v->postprocflag = get_bits1(gb); //common

  944. 

  945.     v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;

  946.     v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;

  947.     v->s.avctx->width = v->s.avctx->coded_width;

  948.     v->s.avctx->height = v->s.avctx->coded_height;

  949.     v->broadcast = get_bits1(gb);

  950.     v->interlace = get_bits1(gb);

  951.     v->tfcntrflag = get_bits1(gb);

  952.     v->finterpflag = get_bits1(gb);

  953.     skip_bits1(gb); // reserved

  954. 

  955.     v->s.h_edge_pos = v->s.avctx->coded_width;

  956.     v->s.v_edge_pos = v->s.avctx->coded_height;

  957. 

  958.     av_log(v->s.avctx, AV_LOG_DEBUG,

  959.                "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"

  960.                "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"

  961.                "TFCTRflag=%i, FINTERPflag=%i\n",

  962.                v->level, v->frmrtq_postproc, v->bitrtq_postproc,

  963.                v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,

  964.                v->tfcntrflag, v->finterpflag

  965.                );

  966. 

  967.     v->psf = get_bits1(gb);

  968.     if(v->psf) { //PsF, 6.1.13

  969.         av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");

  970.         return -1;

  971.     }

  972.     v->s.max_b_frames = v->s.avctx->max_b_frames = 7;

  973.     if(get_bits1(gb)) { //Display Info - decoding is not affected by it

  974.         int w, h, ar = 0;

  975.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");

  976.         v->s.avctx->width  = w = get_bits(gb, 14) + 1;

  977.         v->s.avctx->height = h = get_bits(gb, 14) + 1;

  978.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);

  979.         if(get_bits1(gb))

  980.             ar = get_bits(gb, 4);

  981.         if(ar && ar < 14){

  982.             v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];

  983.         }else if(ar == 15){

  984.             w = get_bits(gb, 8);

  985.             h = get_bits(gb, 8);

  986.             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};

  987.         }

  988.         av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n", v->s.avctx->sample_aspect_ratio.num, v->s.avctx->sample_aspect_ratio.den);

  989. 

  990.         if(get_bits1(gb)){ //framerate stuff

  991.             if(get_bits1(gb)) {

  992.                 v->s.avctx->time_base.num = 32;

  993.                 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;

  994.             } else {

  995.                 int nr, dr;

  996.                 nr = get_bits(gb, 8);

  997.                 dr = get_bits(gb, 4);

  998.                 if(nr && nr < 8 && dr && dr < 3){

  999.                     v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];

  1000.                     v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;

  1001.                 }

  1002.             }

  1003.         }

  1004. 

  1005.         if(get_bits1(gb)){

  1006.             v->color_prim = get_bits(gb, 8);

  1007.             v->transfer_char = get_bits(gb, 8);

  1008.             v->matrix_coef = get_bits(gb, 8);

  1009.         }

  1010.     }

  1011. 

  1012.     v->hrd_param_flag = get_bits1(gb);

  1013.     if(v->hrd_param_flag) {

  1014.         int i;

  1015.         v->hrd_num_leaky_buckets = get_bits(gb, 5);

  1016.         skip_bits(gb, 4); //bitrate exponent

  1017.         skip_bits(gb, 4); //buffer size exponent

  1018.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1019.             skip_bits(gb, 16); //hrd_rate[n]

  1020.             skip_bits(gb, 16); //hrd_buffer[n]

  1021.         }

  1022.     }

  1023.     return 0;

  1024. }

  1025. 

  1026. int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)

  1027. {

  1028.     int i;

  1029. 

  1030.     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));

  1031.     v->broken_link = get_bits1(gb);

  1032.     v->closed_entry = get_bits1(gb);

  1033.     v->panscanflag = get_bits1(gb);

  1034.     v->refdist_flag = get_bits1(gb);

  1035.     v->s.loop_filter = get_bits1(gb);

  1036.     v->fastuvmc = get_bits1(gb);

  1037.     v->extended_mv = get_bits1(gb);

  1038.     v->dquant = get_bits(gb, 2);

  1039.     v->vstransform = get_bits1(gb);

  1040.     v->overlap = get_bits1(gb);

  1041.     v->quantizer_mode = get_bits(gb, 2);

  1042. 

  1043.     if(v->hrd_param_flag){

  1044.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1045.             skip_bits(gb, 8); //hrd_full[n]

  1046.         }

  1047.     }

  1048. 

  1049.     if(get_bits1(gb)){

  1050.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1051.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1052.     }

  1053.     if(v->extended_mv)

  1054.         v->extended_dmv = get_bits1(gb);

  1055.     if((v->range_mapy_flag = get_bits1(gb))) {

  1056.         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");

  1057.         v->range_mapy = get_bits(gb, 3);

  1058.     }

  1059.     if((v->range_mapuv_flag = get_bits1(gb))) {

  1060.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1061.         v->range_mapuv = get_bits(gb, 3);

  1062.     }

  1063. 

  1064.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1065.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1066.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1067.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1068.         v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,

  1069.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1070. 

  1071.     return 0;

  1072. }

  1073. 

  1074. int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1075. {

  1076.     int pqindex, lowquant, status;

  1077. 

  1078.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1079.     skip_bits(gb, 2); //framecnt unused

  1080.     v->rangeredfrm = 0;

  1081.     if (v->rangered) v->rangeredfrm = get_bits1(gb);

  1082.     v->s.pict_type = get_bits1(gb);

  1083.     if (v->s.avctx->max_b_frames) {

  1084.         if (!v->s.pict_type) {

  1085.             if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;

  1086.             else v->s.pict_type = FF_B_TYPE;

  1087.         } else v->s.pict_type = FF_P_TYPE;

  1088.     } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;

  1089. 

  1090.     v->bi_type = 0;

  1091.     if(v->s.pict_type == FF_B_TYPE) {

  1092.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1093.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1094.         if(v->bfraction == 0) {

  1095.             v->s.pict_type = FF_BI_TYPE;

  1096.         }

  1097.     }

  1098.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1099.         skip_bits(gb, 7); // skip buffer fullness

  1100. 

  1101.     if(v->parse_only)

  1102.         return 0;

  1103. 

  1104.     /* calculate RND */

  1105.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1106.         v->rnd = 1;

  1107.     if(v->s.pict_type == FF_P_TYPE)

  1108.         v->rnd ^= 1;

  1109. 

  1110.     /* Quantizer stuff */

  1111.     pqindex = get_bits(gb, 5);

  1112.     if(!pqindex) return -1;

  1113.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1114.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1115.     else

  1116.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1117. 

  1118.     v->pquantizer = 1;

  1119.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1120.         v->pquantizer = pqindex < 9;

  1121.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1122.         v->pquantizer = 0;

  1123.     v->pqindex = pqindex;

  1124.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1125.     else v->halfpq = 0;

  1126.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1127.         v->pquantizer = get_bits1(gb);

  1128.     v->dquantfrm = 0;

  1129.     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);

  1130.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1131.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1132.     v->range_x = 1 << (v->k_x - 1);

  1133.     v->range_y = 1 << (v->k_y - 1);

  1134.     if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);

  1135. 

  1136.     if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){

  1137.         v->x8_type = get_bits1(gb);

  1138.     }else v->x8_type = 0;

  1139. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1140. //        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1141. 

  1142.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1143. 

  1144.     switch(v->s.pict_type) {

  1145.     case FF_P_TYPE:

  1146.         if (v->pq < 5) v->tt_index = 0;

  1147.         else if(v->pq < 13) v->tt_index = 1;

  1148.         else v->tt_index = 2;

  1149. 

  1150.         lowquant = (v->pq > 12) ? 0 : 1;

  1151.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1152.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1153.         {

  1154.             int scale, shift, i;

  1155.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1156.             v->lumscale = get_bits(gb, 6);

  1157.             v->lumshift = get_bits(gb, 6);

  1158.             v->use_ic = 1;

  1159.             /* fill lookup tables for intensity compensation */

  1160.             if(!v->lumscale) {

  1161.                 scale = -64;

  1162.                 shift = (255 - v->lumshift * 2) << 6;

  1163.                 if(v->lumshift > 31)

  1164.                     shift += 128 << 6;

  1165.             } else {

  1166.                 scale = v->lumscale + 32;

  1167.                 if(v->lumshift > 31)

  1168.                     shift = (v->lumshift - 64) << 6;

  1169.                 else

  1170.                     shift = v->lumshift << 6;

  1171.             }

  1172.             for(i = 0; i < 256; i++) {

  1173.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1174.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1175.             }

  1176.         }

  1177.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1178.             v->s.quarter_sample = 0;

  1179.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1180.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1181.                 v->s.quarter_sample = 0;

  1182.             else

  1183.                 v->s.quarter_sample = 1;

  1184.         } else

  1185.             v->s.quarter_sample = 1;

  1186.         v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));

  1187. 

  1188.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1189.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1190.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1191.         {

  1192.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1193.             if (status < 0) return -1;

  1194.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1195.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1196.         } else {

  1197.             v->mv_type_is_raw = 0;

  1198.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1199.         }

  1200.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1201.         if (status < 0) return -1;

  1202.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1203.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1204. 

  1205.         /* Hopefully this is correct for P frames */

  1206.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1207.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1208. 

  1209.         if (v->dquant)

  1210.         {

  1211.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1212.             vop_dquant_decoding(v);

  1213.         }

  1214. 

  1215.         v->ttfrm = 0; //FIXME Is that so ?

  1216.         if (v->vstransform)

  1217.         {

  1218.             v->ttmbf = get_bits1(gb);

  1219.             if (v->ttmbf)

  1220.             {

  1221.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1222.             }

  1223.         } else {

  1224.             v->ttmbf = 1;

  1225.             v->ttfrm = TT_8X8;

  1226.         }

  1227.         break;

  1228.     case FF_B_TYPE:

  1229.         if (v->pq < 5) v->tt_index = 0;

  1230.         else if(v->pq < 13) v->tt_index = 1;

  1231.         else v->tt_index = 2;

  1232. 

  1233.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1234.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1235.         v->s.mspel = v->s.quarter_sample;

  1236. 

  1237.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1238.         if (status < 0) return -1;

  1239.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1240.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1241.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1242.         if (status < 0) return -1;

  1243.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1244.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1245. 

  1246.         v->s.mv_table_index = get_bits(gb, 2);

  1247.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1248. 

  1249.         if (v->dquant)

  1250.         {

  1251.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1252.             vop_dquant_decoding(v);

  1253.         }

  1254. 

  1255.         v->ttfrm = 0;

  1256.         if (v->vstransform)

  1257.         {

  1258.             v->ttmbf = get_bits1(gb);

  1259.             if (v->ttmbf)

  1260.             {

  1261.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1262.             }

  1263.         } else {

  1264.             v->ttmbf = 1;

  1265.             v->ttfrm = TT_8X8;

  1266.         }

  1267.         break;

  1268.     }

  1269. 

  1270.     if(!v->x8_type)

  1271.     {

  1272.         /* AC Syntax */

  1273.         v->c_ac_table_index = decode012(gb);

  1274.         if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1275.         {

  1276.             v->y_ac_table_index = decode012(gb);

  1277.         }

  1278.         /* DC Syntax */

  1279.         v->s.dc_table_index = get_bits1(gb);

  1280.     }

  1281. 

  1282.     if(v->s.pict_type == FF_BI_TYPE) {

  1283.         v->s.pict_type = FF_B_TYPE;

  1284.         v->bi_type = 1;

  1285.     }

  1286.     return 0;

  1287. }

  1288. 

  1289. int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1290. {

  1291.     int pqindex, lowquant;

  1292.     int status;

  1293. 

  1294.     v->p_frame_skipped = 0;

  1295. 

  1296.     if(v->interlace){

  1297.         v->fcm = decode012(gb);

  1298.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1299.     }

  1300.     switch(get_unary(gb, 0, 4)) {

  1301.     case 0:

  1302.         v->s.pict_type = FF_P_TYPE;

  1303.         break;

  1304.     case 1:

  1305.         v->s.pict_type = FF_B_TYPE;

  1306.         break;

  1307.     case 2:

  1308.         v->s.pict_type = FF_I_TYPE;

  1309.         break;

  1310.     case 3:

  1311.         v->s.pict_type = FF_BI_TYPE;

  1312.         break;

  1313.     case 4:

  1314.         v->s.pict_type = FF_P_TYPE; // skipped pic

  1315.         v->p_frame_skipped = 1;

  1316.         return 0;

  1317.     }

  1318.     if(v->tfcntrflag)

  1319.         skip_bits(gb, 8);

  1320.     if(v->broadcast) {

  1321.         if(!v->interlace || v->psf) {

  1322.             v->rptfrm = get_bits(gb, 2);

  1323.         } else {

  1324.             v->tff = get_bits1(gb);

  1325.             v->rptfrm = get_bits1(gb);

  1326.         }

  1327.     }

  1328.     if(v->panscanflag) {

  1329.         //...

  1330.     }

  1331.     v->rnd = get_bits1(gb);

  1332.     if(v->interlace)

  1333.         v->uvsamp = get_bits1(gb);

  1334.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1335.     if(v->s.pict_type == FF_B_TYPE) {

  1336.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1337.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1338.         if(v->bfraction == 0) {

  1339.             v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */

  1340.         }

  1341.     }

  1342.     pqindex = get_bits(gb, 5);

  1343.     if(!pqindex) return -1;

  1344.     v->pqindex = pqindex;

  1345.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1346.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1347.     else

  1348.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1349. 

  1350.     v->pquantizer = 1;

  1351.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1352.         v->pquantizer = pqindex < 9;

  1353.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1354.         v->pquantizer = 0;

  1355.     v->pqindex = pqindex;

  1356.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1357.     else v->halfpq = 0;

  1358.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1359.         v->pquantizer = get_bits1(gb);

  1360.     if(v->postprocflag)

  1361.         v->postproc = get_bits(gb, 2);

  1362. 

  1363.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1364. 

  1365.     if(v->parse_only)

  1366.         return 0;

  1367. 

  1368.     switch(v->s.pict_type) {

  1369.     case FF_I_TYPE:

  1370.     case FF_BI_TYPE:

  1371.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1372.         if (status < 0) return -1;

  1373.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1374.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1375.         v->condover = CONDOVER_NONE;

  1376.         if(v->overlap && v->pq <= 8) {

  1377.             v->condover = decode012(gb);

  1378.             if(v->condover == CONDOVER_SELECT) {

  1379.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1380.                 if (status < 0) return -1;

  1381.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1382.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1383.             }

  1384.         }

  1385.         break;

  1386.     case FF_P_TYPE:

  1387.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1388.         else v->mvrange = 0;

  1389.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1390.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1391.         v->range_x = 1 << (v->k_x - 1);

  1392.         v->range_y = 1 << (v->k_y - 1);

  1393. 

  1394.         if (v->pq < 5) v->tt_index = 0;

  1395.         else if(v->pq < 13) v->tt_index = 1;

  1396.         else v->tt_index = 2;

  1397. 

  1398.         lowquant = (v->pq > 12) ? 0 : 1;

  1399.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1400.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1401.         {

  1402.             int scale, shift, i;

  1403.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1404.             v->lumscale = get_bits(gb, 6);

  1405.             v->lumshift = get_bits(gb, 6);

  1406.             /* fill lookup tables for intensity compensation */

  1407.             if(!v->lumscale) {

  1408.                 scale = -64;

  1409.                 shift = (255 - v->lumshift * 2) << 6;

  1410.                 if(v->lumshift > 31)

  1411.                     shift += 128 << 6;

  1412.             } else {

  1413.                 scale = v->lumscale + 32;

  1414.                 if(v->lumshift > 31)

  1415.                     shift = (v->lumshift - 64) << 6;

  1416.                 else

  1417.                     shift = v->lumshift << 6;

  1418.             }

  1419.             for(i = 0; i < 256; i++) {

  1420.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1421.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1422.             }

  1423.             v->use_ic = 1;

  1424.         }

  1425.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1426.             v->s.quarter_sample = 0;

  1427.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1428.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1429.                 v->s.quarter_sample = 0;

  1430.             else

  1431.                 v->s.quarter_sample = 1;

  1432.         } else

  1433.             v->s.quarter_sample = 1;

  1434.         v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));

  1435. 

  1436.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1437.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1438.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1439.         {

  1440.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1441.             if (status < 0) return -1;

  1442.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1443.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1444.         } else {

  1445.             v->mv_type_is_raw = 0;

  1446.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1447.         }

  1448.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1449.         if (status < 0) return -1;

  1450.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1451.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1452. 

  1453.         /* Hopefully this is correct for P frames */

  1454.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1455.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1456.         if (v->dquant)

  1457.         {

  1458.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1459.             vop_dquant_decoding(v);

  1460.         }

  1461. 

  1462.         v->ttfrm = 0; //FIXME Is that so ?

  1463.         if (v->vstransform)

  1464.         {

  1465.             v->ttmbf = get_bits1(gb);

  1466.             if (v->ttmbf)

  1467.             {

  1468.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1469.             }

  1470.         } else {

  1471.             v->ttmbf = 1;

  1472.             v->ttfrm = TT_8X8;

  1473.         }

  1474.         break;

  1475.     case FF_B_TYPE:

  1476.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1477.         else v->mvrange = 0;

  1478.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1479.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1480.         v->range_x = 1 << (v->k_x - 1);

  1481.         v->range_y = 1 << (v->k_y - 1);

  1482. 

  1483.         if (v->pq < 5) v->tt_index = 0;

  1484.         else if(v->pq < 13) v->tt_index = 1;

  1485.         else v->tt_index = 2;

  1486. 

  1487.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1488.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1489.         v->s.mspel = v->s.quarter_sample;

  1490. 

  1491.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1492.         if (status < 0) return -1;

  1493.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1494.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1495.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1496.         if (status < 0) return -1;

  1497.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1498.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1499. 

  1500.         v->s.mv_table_index = get_bits(gb, 2);

  1501.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1502. 

  1503.         if (v->dquant)

  1504.         {

  1505.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1506.             vop_dquant_decoding(v);

  1507.         }

  1508. 

  1509.         v->ttfrm = 0;

  1510.         if (v->vstransform)

  1511.         {

  1512.             v->ttmbf = get_bits1(gb);

  1513.             if (v->ttmbf)

  1514.             {

  1515.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1516.             }

  1517.         } else {

  1518.             v->ttmbf = 1;

  1519.             v->ttfrm = TT_8X8;

  1520.         }

  1521.         break;

  1522.     }

  1523. 

  1524.     /* AC Syntax */

  1525.     v->c_ac_table_index = decode012(gb);

  1526.     if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1527.     {

  1528.         v->y_ac_table_index = decode012(gb);

  1529.     }

  1530.     /* DC Syntax */

  1531.     v->s.dc_table_index = get_bits1(gb);

  1532.     if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {

  1533.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1534.         vop_dquant_decoding(v);

  1535.     }

  1536. 

  1537.     v->bi_type = 0;

  1538.     if(v->s.pict_type == FF_BI_TYPE) {

  1539.         v->s.pict_type = FF_B_TYPE;

  1540.         v->bi_type = 1;

  1541.     }

  1542.     return 0;

  1543. }

  1544. 

  1545. /***********************************************************************/

  1546. /**

  1547.  * @defgroup vc1block VC-1 Block-level functions

  1548.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1549.  * @{

  1550.  */

  1551. 

  1552. /**

  1553.  * @def GET_MQUANT

  1554.  * @brief Get macroblock-level quantizer scale

  1555.  */

  1556. #define GET_MQUANT()                                           \

  1557.   if (v->dquantfrm)                                            \

  1558.   {                                                            \

  1559.     int edges = 0;                                             \

  1560.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1561.     {                                                          \

  1562.       if (v->dqbilevel)                                        \

  1563.       {                                                        \

  1564.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1565.       }                                                        \

  1566.       else                                                     \

  1567.       {                                                        \

  1568.         mqdiff = get_bits(gb, 3);                              \

  1569.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1570.         else mquant = get_bits(gb, 5);                         \

  1571.       }                                                        \

  1572.     }                                                          \

  1573.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1574.         edges = 1 << v->dqsbedge;                              \

  1575.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1576.         edges = (3 << v->dqsbedge) % 15;                       \

  1577.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1578.         edges = 15;                                            \

  1579.     if((edges&1) && !s->mb_x)                                  \

  1580.         mquant = v->altpq;                                     \

  1581.     if((edges&2) && s->first_slice_line)                       \

  1582.         mquant = v->altpq;                                     \

  1583.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1584.         mquant = v->altpq;                                     \

  1585.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1586.         mquant = v->altpq;                                     \

  1587.   }

  1588. 

  1589. /**

  1590.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1591.  * @brief Get MV differentials

  1592.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1593.  * @param _dmv_x Horizontal differential for decoded MV

  1594.  * @param _dmv_y Vertical differential for decoded MV

  1595.  */

  1596. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1597.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1598.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1599.   if (index > 36)                                                   \

  1600.   {                                                                 \

  1601.     mb_has_coeffs = 1;                                              \

  1602.     index -= 37;                                                    \

  1603.   }                                                                 \

  1604.   else mb_has_coeffs = 0;                                           \

  1605.   s->mb_intra = 0;                                                  \

  1606.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1607.   else if (index == 35)                                             \

  1608.   {                                                                 \

  1609.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1610.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1611.   }                                                                 \

  1612.   else if (index == 36)                                             \

  1613.   {                                                                 \

  1614.     _dmv_x = 0;                                                     \

  1615.     _dmv_y = 0;                                                     \

  1616.     s->mb_intra = 1;                                                \

  1617.   }                                                                 \

  1618.   else                                                              \

  1619.   {                                                                 \

  1620.     index1 = index%6;                                               \

  1621.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1622.     else                                   val = 0;                 \

  1623.     if(size_table[index1] - val > 0)                                \

  1624.         val = get_bits(gb, size_table[index1] - val);               \

  1625.     else                                   val = 0;                 \

  1626.     sign = 0 - (val&1);                                             \

  1627.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1628.                                                                     \

  1629.     index1 = index/6;                                               \

  1630.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1631.     else                                   val = 0;                 \

  1632.     if(size_table[index1] - val > 0)                                \

  1633.         val = get_bits(gb, size_table[index1] - val);               \

  1634.     else                                   val = 0;                 \

  1635.     sign = 0 - (val&1);                                             \

  1636.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1637.   }

  1638. 

  1639. /** Predict and set motion vector

  1640.  */

  1641. static inline void vc1_pred_mv(MpegEncContext *s, int n, int dmv_x, int dmv_y, int mv1, int r_x, int r_y, uint8_t* is_intra)

  1642. {

  1643.     int xy, wrap, off = 0;

  1644.     int16_t *A, *B, *C;

  1645.     int px, py;

  1646.     int sum;

  1647. 

  1648.     /* scale MV difference to be quad-pel */

  1649.     dmv_x <<= 1 - s->quarter_sample;

  1650.     dmv_y <<= 1 - s->quarter_sample;

  1651. 

  1652.     wrap = s->b8_stride;

  1653.     xy = s->block_index[n];

  1654. 

  1655.     if(s->mb_intra){

  1656.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1657.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

  1658.         s->current_picture.motion_val[1][xy][0] = 0;

  1659.         s->current_picture.motion_val[1][xy][1] = 0;

  1660.         if(mv1) { /* duplicate motion data for 1-MV block */

  1661.             s->current_picture.motion_val[0][xy + 1][0] = 0;

  1662.             s->current_picture.motion_val[0][xy + 1][1] = 0;

  1663.             s->current_picture.motion_val[0][xy + wrap][0] = 0;

  1664.             s->current_picture.motion_val[0][xy + wrap][1] = 0;

  1665.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  1666.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  1667.             s->current_picture.motion_val[1][xy + 1][0] = 0;

  1668.             s->current_picture.motion_val[1][xy + 1][1] = 0;

  1669.             s->current_picture.motion_val[1][xy + wrap][0] = 0;

  1670.             s->current_picture.motion_val[1][xy + wrap][1] = 0;

  1671.             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;

  1672.             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;

  1673.         }

  1674.         return;

  1675.     }

  1676. 

  1677.     C = s->current_picture.motion_val[0][xy - 1];

  1678.     A = s->current_picture.motion_val[0][xy - wrap];

  1679.     if(mv1)

  1680.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1681.     else {

  1682.         //in 4-MV mode different blocks have different B predictor position

  1683.         switch(n){

  1684.         case 0:

  1685.             off = (s->mb_x > 0) ? -1 : 1;

  1686.             break;

  1687.         case 1:

  1688.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1689.             break;

  1690.         case 2:

  1691.             off = 1;

  1692.             break;

  1693.         case 3:

  1694.             off = -1;

  1695.         }

  1696.     }

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

  1698. 

  1699.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1700.         if(s->mb_width == 1) {

  1701.             px = A[0];

  1702.             py = A[1];

  1703.         } else {

  1704.             px = mid_pred(A[0], B[0], C[0]);

  1705.             py = mid_pred(A[1], B[1], C[1]);

  1706.         }

  1707.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1708.         px = C[0];

  1709.         py = C[1];

  1710.     } else {

  1711.         px = py = 0;

  1712.     }

  1713.     /* Pullback MV as specified in 8.3.5.3.4 */

  1714.     {

  1715.         int qx, qy, X, Y;

  1716.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1717.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1718.         X = (s->mb_width << 6) - 4;

  1719.         Y = (s->mb_height << 6) - 4;

  1720.         if(mv1) {

  1721.             if(qx + px < -60) px = -60 - qx;

  1722.             if(qy + py < -60) py = -60 - qy;

  1723.         } else {

  1724.             if(qx + px < -28) px = -28 - qx;

  1725.             if(qy + py < -28) py = -28 - qy;

  1726.         }

  1727.         if(qx + px > X) px = X - qx;

  1728.         if(qy + py > Y) py = Y - qy;

  1729.     }

  1730.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1731.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1732.         if(is_intra[xy - wrap])

  1733.             sum = FFABS(px) + FFABS(py);

  1734.         else

  1735.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1736.         if(sum > 32) {

  1737.             if(get_bits1(&s->gb)) {

  1738.                 px = A[0];

  1739.                 py = A[1];

  1740.             } else {

  1741.                 px = C[0];

  1742.                 py = C[1];

  1743.             }

  1744.         } else {

  1745.             if(is_intra[xy - 1])

  1746.                 sum = FFABS(px) + FFABS(py);

  1747.             else

  1748.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1749.             if(sum > 32) {

  1750.                 if(get_bits1(&s->gb)) {

  1751.                     px = A[0];

  1752.                     py = A[1];

  1753.                 } else {

  1754.                     px = C[0];

  1755.                     py = C[1];

  1756.                 }

  1757.             }

  1758.         }

  1759.     }

  1760.     /* store MV using signed modulus of MV range defined in 4.11 */

  1761.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1762.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1763.     if(mv1) { /* duplicate motion data for 1-MV block */

  1764.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  1765.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  1766.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1767.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1768.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1769.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1770.     }

  1771. }

  1772. 

  1773. /** Motion compensation for direct or interpolated blocks in B-frames

  1774.  */

  1775. static void vc1_interp_mc(VC1Context *v)

  1776. {

  1777.     MpegEncContext *s = &v->s;

  1778.     DSPContext *dsp = &v->s.dsp;

  1779.     uint8_t *srcY, *srcU, *srcV;

  1780.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1781. 

  1782.     if(!v->s.next_picture.data[0])return;

  1783. 

  1784.     mx = s->mv[1][0][0];

  1785.     my = s->mv[1][0][1];

  1786.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1787.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1788.     if(v->fastuvmc) {

  1789.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1790.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1791.     }

  1792.     srcY = s->next_picture.data[0];

  1793.     srcU = s->next_picture.data[1];

  1794.     srcV = s->next_picture.data[2];

  1795. 

  1796.     src_x = s->mb_x * 16 + (mx >> 2);

  1797.     src_y = s->mb_y * 16 + (my >> 2);

  1798.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1799.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1800. 

  1801.     if(v->profile != PROFILE_ADVANCED){

  1802.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1803.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1804.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1805.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1806.     }else{

  1807.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1808.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1809.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1810.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1811.     }

  1812. 

  1813.     srcY += src_y * s->linesize + src_x;

  1814.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1815.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1816. 

  1817.     /* for grayscale we should not try to read from unknown area */

  1818.     if(s->flags & CODEC_FLAG_GRAY) {

  1819.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1820.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1821.     }

  1822. 

  1823.     if(v->rangeredfrm

  1824.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16 - s->mspel*3

  1825.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16 - s->mspel*3){

  1826.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1827. 

  1828.         srcY -= s->mspel * (1 + s->linesize);

  1829.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1830.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1831.         srcY = s->edge_emu_buffer;

  1832.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1833.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1834.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1835.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1836.         srcU = uvbuf;

  1837.         srcV = uvbuf + 16;

  1838.         /* if we deal with range reduction we need to scale source blocks */

  1839.         if(v->rangeredfrm) {

  1840.             int i, j;

  1841.             uint8_t *src, *src2;

  1842. 

  1843.             src = srcY;

  1844.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1845.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1846.                 src += s->linesize;

  1847.             }

  1848.             src = srcU; src2 = srcV;

  1849.             for(j = 0; j < 9; j++) {

  1850.                 for(i = 0; i < 9; i++) {

  1851.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1852.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1853.                 }

  1854.                 src += s->uvlinesize;

  1855.                 src2 += s->uvlinesize;

  1856.             }

  1857.         }

  1858.         srcY += s->mspel * (1 + s->linesize);

  1859.     }

  1860. 

  1861.     if(s->mspel) {

  1862.         dxy = ((my & 3) << 2) | (mx & 3);

  1863.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  1864.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);

  1865.         srcY += s->linesize * 8;

  1866.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  1867.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  1868.     } else { // hpel mc

  1869.         dxy = (my & 2) | ((mx & 2) >> 1);

  1870. 

  1871.         if(!v->rnd)

  1872.             dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1873.         else

  1874.             dsp->avg_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1875.     }

  1876. 

  1877.     if(s->flags & CODEC_FLAG_GRAY) return;

  1878.     /* Chroma MC always uses qpel blilinear */

  1879.     uvmx = (uvmx&3)<<1;

  1880.     uvmy = (uvmy&3)<<1;

  1881.     if(!v->rnd){

  1882.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1883.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1884.     }else{

  1885.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1886.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1887.     }

  1888. }

  1889. 

  1890. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1891. {

  1892.     int n = bfrac;

  1893. 

  1894. #if B_FRACTION_DEN==256

  1895.     if(inv)

  1896.         n -= 256;

  1897.     if(!qs)

  1898.         return 2 * ((value * n + 255) >> 9);

  1899.     return (value * n + 128) >> 8;

  1900. #else

  1901.     if(inv)

  1902.         n -= B_FRACTION_DEN;

  1903.     if(!qs)

  1904.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1905.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1906. #endif

  1907. }

  1908. 

  1909. /** Reconstruct motion vector for B-frame and do motion compensation

  1910.  */

  1911. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1912. {

  1913.     if(v->use_ic) {

  1914.         v->mv_mode2 = v->mv_mode;

  1915.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1916.     }

  1917.     if(direct) {

  1918.         vc1_mc_1mv(v, 0);

  1919.         vc1_interp_mc(v);

  1920.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1921.         return;

  1922.     }

  1923.     if(mode == BMV_TYPE_INTERPOLATED) {

  1924.         vc1_mc_1mv(v, 0);

  1925.         vc1_interp_mc(v);

  1926.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1927.         return;

  1928.     }

  1929. 

  1930.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1931.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1932.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1933. }

  1934. 

  1935. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1936. {

  1937.     MpegEncContext *s = &v->s;

  1938.     int xy, wrap, off = 0;

  1939.     int16_t *A, *B, *C;

  1940.     int px, py;

  1941.     int sum;

  1942.     int r_x, r_y;

  1943.     const uint8_t *is_intra = v->mb_type[0];

  1944. 

  1945.     r_x = v->range_x;

  1946.     r_y = v->range_y;

  1947.     /* scale MV difference to be quad-pel */

  1948.     dmv_x[0] <<= 1 - s->quarter_sample;

  1949.     dmv_y[0] <<= 1 - s->quarter_sample;

  1950.     dmv_x[1] <<= 1 - s->quarter_sample;

  1951.     dmv_y[1] <<= 1 - s->quarter_sample;

  1952. 

  1953.     wrap = s->b8_stride;

  1954.     xy = s->block_index[0];

  1955. 

  1956.     if(s->mb_intra) {

  1957.         s->current_picture.motion_val[0][xy][0] =

  1958.         s->current_picture.motion_val[0][xy][1] =

  1959.         s->current_picture.motion_val[1][xy][0] =

  1960.         s->current_picture.motion_val[1][xy][1] = 0;

  1961.         return;

  1962.     }

  1963.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  1964.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  1965.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  1966.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  1967. 

  1968.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  1969.     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));

  1970.     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));

  1971.     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));

  1972.     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));

  1973.     if(direct) {

  1974.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  1975.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  1976.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  1977.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  1978.         return;

  1979.     }

  1980. 

  1981.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  1982.         C = s->current_picture.motion_val[0][xy - 2];

  1983.         A = s->current_picture.motion_val[0][xy - wrap*2];

  1984.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1985.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  1986. 

  1987.         if(!s->mb_x) C[0] = C[1] = 0;

  1988.         if(!s->first_slice_line) { // predictor A is not out of bounds

  1989.             if(s->mb_width == 1) {

  1990.                 px = A[0];

  1991.                 py = A[1];

  1992.             } else {

  1993.                 px = mid_pred(A[0], B[0], C[0]);

  1994.                 py = mid_pred(A[1], B[1], C[1]);

  1995.             }

  1996.         } else if(s->mb_x) { // predictor C is not out of bounds

  1997.             px = C[0];

  1998.             py = C[1];

  1999.         } else {

  2000.             px = py = 0;

  2001.         }

  2002.         /* Pullback MV as specified in 8.3.5.3.4 */

  2003.         {

  2004.             int qx, qy, X, Y;

  2005.             if(v->profile < PROFILE_ADVANCED) {

  2006.                 qx = (s->mb_x << 5);

  2007.                 qy = (s->mb_y << 5);

  2008.                 X = (s->mb_width << 5) - 4;

  2009.                 Y = (s->mb_height << 5) - 4;

  2010.                 if(qx + px < -28) px = -28 - qx;

  2011.                 if(qy + py < -28) py = -28 - qy;

  2012.                 if(qx + px > X) px = X - qx;

  2013.                 if(qy + py > Y) py = Y - qy;

  2014.             } else {

  2015.                 qx = (s->mb_x << 6);

  2016.                 qy = (s->mb_y << 6);

  2017.                 X = (s->mb_width << 6) - 4;

  2018.                 Y = (s->mb_height << 6) - 4;

  2019.                 if(qx + px < -60) px = -60 - qx;

  2020.                 if(qy + py < -60) py = -60 - qy;

  2021.                 if(qx + px > X) px = X - qx;

  2022.                 if(qy + py > Y) py = Y - qy;

  2023.             }

  2024.         }

  2025.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2026.         if(0 && !s->first_slice_line && s->mb_x) {

  2027.             if(is_intra[xy - wrap])

  2028.                 sum = FFABS(px) + FFABS(py);

  2029.             else

  2030.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2031.             if(sum > 32) {

  2032.                 if(get_bits1(&s->gb)) {

  2033.                     px = A[0];

  2034.                     py = A[1];

  2035.                 } else {

  2036.                     px = C[0];

  2037.                     py = C[1];

  2038.                 }

  2039.             } else {

  2040.                 if(is_intra[xy - 2])

  2041.                     sum = FFABS(px) + FFABS(py);

  2042.                 else

  2043.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2044.                 if(sum > 32) {

  2045.                     if(get_bits1(&s->gb)) {

  2046.                         px = A[0];

  2047.                         py = A[1];

  2048.                     } else {

  2049.                         px = C[0];

  2050.                         py = C[1];

  2051.                     }

  2052.                 }

  2053.             }

  2054.         }

  2055.         /* store MV using signed modulus of MV range defined in 4.11 */

  2056.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2057.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2058.     }

  2059.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2060.         C = s->current_picture.motion_val[1][xy - 2];

  2061.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2062.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2063.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2064. 

  2065.         if(!s->mb_x) C[0] = C[1] = 0;

  2066.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2067.             if(s->mb_width == 1) {

  2068.                 px = A[0];

  2069.                 py = A[1];

  2070.             } else {

  2071.                 px = mid_pred(A[0], B[0], C[0]);

  2072.                 py = mid_pred(A[1], B[1], C[1]);

  2073.             }

  2074.         } else if(s->mb_x) { // predictor C is not out of bounds

  2075.             px = C[0];

  2076.             py = C[1];

  2077.         } else {

  2078.             px = py = 0;

  2079.         }

  2080.         /* Pullback MV as specified in 8.3.5.3.4 */

  2081.         {

  2082.             int qx, qy, X, Y;

  2083.             if(v->profile < PROFILE_ADVANCED) {

  2084.                 qx = (s->mb_x << 5);

  2085.                 qy = (s->mb_y << 5);

  2086.                 X = (s->mb_width << 5) - 4;

  2087.                 Y = (s->mb_height << 5) - 4;

  2088.                 if(qx + px < -28) px = -28 - qx;

  2089.                 if(qy + py < -28) py = -28 - qy;

  2090.                 if(qx + px > X) px = X - qx;

  2091.                 if(qy + py > Y) py = Y - qy;

  2092.             } else {

  2093.                 qx = (s->mb_x << 6);

  2094.                 qy = (s->mb_y << 6);

  2095.                 X = (s->mb_width << 6) - 4;

  2096.                 Y = (s->mb_height << 6) - 4;

  2097.                 if(qx + px < -60) px = -60 - qx;

  2098.                 if(qy + py < -60) py = -60 - qy;

  2099.                 if(qx + px > X) px = X - qx;

  2100.                 if(qy + py > Y) py = Y - qy;

  2101.             }

  2102.         }

  2103.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2104.         if(0 && !s->first_slice_line && s->mb_x) {

  2105.             if(is_intra[xy - wrap])

  2106.                 sum = FFABS(px) + FFABS(py);

  2107.             else

  2108.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2109.             if(sum > 32) {

  2110.                 if(get_bits1(&s->gb)) {

  2111.                     px = A[0];

  2112.                     py = A[1];

  2113.                 } else {

  2114.                     px = C[0];

  2115.                     py = C[1];

  2116.                 }

  2117.             } else {

  2118.                 if(is_intra[xy - 2])

  2119.                     sum = FFABS(px) + FFABS(py);

  2120.                 else

  2121.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2122.                 if(sum > 32) {

  2123.                     if(get_bits1(&s->gb)) {

  2124.                         px = A[0];

  2125.                         py = A[1];

  2126.                     } else {

  2127.                         px = C[0];

  2128.                         py = C[1];

  2129.                     }

  2130.                 }

  2131.             }

  2132.         }

  2133.         /* store MV using signed modulus of MV range defined in 4.11 */

  2134. 

  2135.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2136.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2137.     }

  2138.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2139.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2140.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2141.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2142. }

  2143. 

  2144. /** Get predicted DC value for I-frames only

  2145.  * prediction dir: left=0, top=1

  2146.  * @param s MpegEncContext

  2147.  * @param overlap flag indicating that overlap filtering is used

  2148.  * @param pq integer part of picture quantizer

  2149.  * @param[in] n block index in the current MB

  2150.  * @param dc_val_ptr Pointer to DC predictor

  2151.  * @param dir_ptr Prediction direction for use in AC prediction

  2152.  */

  2153. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2154.                               int16_t **dc_val_ptr, int *dir_ptr)

  2155. {

  2156.     int a, b, c, wrap, pred, scale;

  2157.     int16_t *dc_val;

  2158.     static const uint16_t dcpred[32] = {

  2159.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2160.          114,  102,   93,   85,   79,   73,   68,   64,

  2161.           60,   57,   54,   51,   49,   47,   45,   43,

  2162.           41,   39,   38,   37,   35,   34,   33

  2163.     };

  2164. 

  2165.     /* find prediction - wmv3_dc_scale always used here in fact */

  2166.     if (n < 4)     scale = s->y_dc_scale;

  2167.     else           scale = s->c_dc_scale;

  2168. 

  2169.     wrap = s->block_wrap[n];

  2170.     dc_val= s->dc_val[0] + s->block_index[n];

  2171. 

  2172.     /* B A

  2173.      * C X

  2174.      */

  2175.     c = dc_val[ - 1];

  2176.     b = dc_val[ - 1 - wrap];

  2177.     a = dc_val[ - wrap];

  2178. 

  2179.     if (pq < 9 || !overlap)

  2180.     {

  2181.         /* Set outer values */

  2182.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2183.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2184.     }

  2185.     else

  2186.     {

  2187.         /* Set outer values */

  2188.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2189.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2190.     }

  2191. 

  2192.     if (abs(a - b) <= abs(b - c)) {

  2193.         pred = c;

  2194.         *dir_ptr = 1;//left

  2195.     } else {

  2196.         pred = a;

  2197.         *dir_ptr = 0;//top

  2198.     }

  2199. 

  2200.     /* update predictor */

  2201.     *dc_val_ptr = &dc_val[0];

  2202.     return pred;

  2203. }

  2204. 

  2205. 

  2206. /** Get predicted DC value

  2207.  * prediction dir: left=0, top=1

  2208.  * @param s MpegEncContext

  2209.  * @param overlap flag indicating that overlap filtering is used

  2210.  * @param pq integer part of picture quantizer

  2211.  * @param[in] n block index in the current MB

  2212.  * @param a_avail flag indicating top block availability

  2213.  * @param c_avail flag indicating left block availability

  2214.  * @param dc_val_ptr Pointer to DC predictor

  2215.  * @param dir_ptr Prediction direction for use in AC prediction

  2216.  */

  2217. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2218.                               int a_avail, int c_avail,

  2219.                               int16_t **dc_val_ptr, int *dir_ptr)

  2220. {

  2221.     int a, b, c, wrap, pred;

  2222.     int16_t *dc_val;

  2223.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2224.     int q1, q2 = 0;

  2225. 

  2226.     wrap = s->block_wrap[n];

  2227.     dc_val= s->dc_val[0] + s->block_index[n];

  2228. 

  2229.     /* B A

  2230.      * C X

  2231.      */

  2232.     c = dc_val[ - 1];

  2233.     b = dc_val[ - 1 - wrap];

  2234.     a = dc_val[ - wrap];

  2235.     /* scale predictors if needed */

  2236.     q1 = s->current_picture.qscale_table[mb_pos];

  2237.     if(c_avail && (n!= 1 && n!=3)) {

  2238.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2239.         if(q2 && q2 != q1)

  2240.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2241.     }

  2242.     if(a_avail && (n!= 2 && n!=3)) {

  2243.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2244.         if(q2 && q2 != q1)

  2245.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2246.     }

  2247.     if(a_avail && c_avail && (n!=3)) {

  2248.         int off = mb_pos;

  2249.         if(n != 1) off--;

  2250.         if(n != 2) off -= s->mb_stride;

  2251.         q2 = s->current_picture.qscale_table[off];

  2252.         if(q2 && q2 != q1)

  2253.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2254.     }

  2255. 

  2256.     if(a_avail && c_avail) {

  2257.         if(abs(a - b) <= abs(b - c)) {

  2258.             pred = c;

  2259.             *dir_ptr = 1;//left

  2260.         } else {

  2261.             pred = a;

  2262.             *dir_ptr = 0;//top

  2263.         }

  2264.     } else if(a_avail) {

  2265.         pred = a;

  2266.         *dir_ptr = 0;//top

  2267.     } else if(c_avail) {

  2268.         pred = c;

  2269.         *dir_ptr = 1;//left

  2270.     } else {

  2271.         pred = 0;

  2272.         *dir_ptr = 1;//left

  2273.     }

  2274. 

  2275.     /* update predictor */

  2276.     *dc_val_ptr = &dc_val[0];

  2277.     return pred;

  2278. }

  2279. 

  2280. /** @} */ // Block group

  2281. 

  2282. /**

  2283.  * @defgroup vc1_std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2284.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2285.  * @{

  2286.  */

  2287. 

  2288. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2289. {

  2290.     int xy, wrap, pred, a, b, c;

  2291. 

  2292.     xy = s->block_index[n];

  2293.     wrap = s->b8_stride;

  2294. 

  2295.     /* B C

  2296.      * A X

  2297.      */

  2298.     a = s->coded_block[xy - 1       ];

  2299.     b = s->coded_block[xy - 1 - wrap];

  2300.     c = s->coded_block[xy     - wrap];

  2301. 

  2302.     if (b == c) {

  2303.         pred = a;

  2304.     } else {

  2305.         pred = c;

  2306.     }

  2307. 

  2308.     /* store value */

  2309.     *coded_block_ptr = &s->coded_block[xy];

  2310. 

  2311.     return pred;

  2312. }

  2313. 

  2314. /**

  2315.  * Decode one AC coefficient

  2316.  * @param v The VC1 context

  2317.  * @param last Last coefficient

  2318.  * @param skip How much zero coefficients to skip

  2319.  * @param value Decoded AC coefficient value

  2320.  * @param codingset set of VLC to decode data

  2321.  * @see 8.1.3.4

  2322.  */

  2323. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2324. {

  2325.     GetBitContext *gb = &v->s.gb;

  2326.     int index, escape, run = 0, level = 0, lst = 0;

  2327. 

  2328.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2329.     if (index != vc1_ac_sizes[codingset] - 1) {

  2330.         run = vc1_index_decode_table[codingset][index][0];

  2331.         level = vc1_index_decode_table[codingset][index][1];

  2332.         lst = index >= vc1_last_decode_table[codingset];

  2333.         if(get_bits1(gb))

  2334.             level = -level;

  2335.     } else {

  2336.         escape = decode210(gb);

  2337.         if (escape != 2) {

  2338.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2339.             run = vc1_index_decode_table[codingset][index][0];

  2340.             level = vc1_index_decode_table[codingset][index][1];

  2341.             lst = index >= vc1_last_decode_table[codingset];

  2342.             if(escape == 0) {

  2343.                 if(lst)

  2344.                     level += vc1_last_delta_level_table[codingset][run];

  2345.                 else

  2346.                     level += vc1_delta_level_table[codingset][run];

  2347.             } else {

  2348.                 if(lst)

  2349.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2350.                 else

  2351.                     run += vc1_delta_run_table[codingset][level] + 1;

  2352.             }

  2353.             if(get_bits1(gb))

  2354.                 level = -level;

  2355.         } else {

  2356.             int sign;

  2357.             lst = get_bits1(gb);

  2358.             if(v->s.esc3_level_length == 0) {

  2359.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2360.                     v->s.esc3_level_length = get_bits(gb, 3);

  2361.                     if(!v->s.esc3_level_length)

  2362.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2363.                 } else { //table 60

  2364.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2365.                 }

  2366.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2367.             }

  2368.             run = get_bits(gb, v->s.esc3_run_length);

  2369.             sign = get_bits1(gb);

  2370.             level = get_bits(gb, v->s.esc3_level_length);

  2371.             if(sign)

  2372.                 level = -level;

  2373.         }

  2374.     }

  2375. 

  2376.     *last = lst;

  2377.     *skip = run;

  2378.     *value = level;

  2379. }

  2380. 

  2381. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2382.  * @param v VC1Context

  2383.  * @param block block to decode

  2384.  * @param[in] n subblock index

  2385.  * @param coded are AC coeffs present or not

  2386.  * @param codingset set of VLC to decode data

  2387.  */

  2388. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2389. {

  2390.     GetBitContext *gb = &v->s.gb;

  2391.     MpegEncContext *s = &v->s;

  2392.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2393.     int i;

  2394.     int16_t *dc_val;

  2395.     int16_t *ac_val, *ac_val2;

  2396.     int dcdiff;

  2397. 

  2398.     /* Get DC differential */

  2399.     if (n < 4) {

  2400.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2401.     } else {

  2402.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2403.     }

  2404.     if (dcdiff < 0){

  2405.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2406.         return -1;

  2407.     }

  2408.     if (dcdiff)

  2409.     {

  2410.         if (dcdiff == 119 /* ESC index value */)

  2411.         {

  2412.             /* TODO: Optimize */

  2413.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2414.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2415.             else dcdiff = get_bits(gb, 8);

  2416.         }

  2417.         else

  2418.         {

  2419.             if (v->pq == 1)

  2420.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2421.             else if (v->pq == 2)

  2422.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2423.         }

  2424.         if (get_bits1(gb))

  2425.             dcdiff = -dcdiff;

  2426.     }

  2427. 

  2428.     /* Prediction */

  2429.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2430.     *dc_val = dcdiff;

  2431. 

  2432.     /* Store the quantized DC coeff, used for prediction */

  2433.     if (n < 4) {

  2434.         block[0] = dcdiff * s->y_dc_scale;

  2435.     } else {

  2436.         block[0] = dcdiff * s->c_dc_scale;

  2437.     }

  2438.     /* Skip ? */

  2439.     if (!coded) {

  2440.         goto not_coded;

  2441.     }

  2442. 

  2443.     //AC Decoding

  2444.     i = 1;

  2445. 

  2446.     {

  2447.         int last = 0, skip, value;

  2448.         const int8_t *zz_table;

  2449.         int scale;

  2450.         int k;

  2451. 

  2452.         scale = v->pq * 2 + v->halfpq;

  2453. 

  2454.         if(v->s.ac_pred) {

  2455.             if(!dc_pred_dir)

  2456.                 zz_table = wmv1_scantable[2];

  2457.             else

  2458.                 zz_table = wmv1_scantable[3];

  2459.         } else

  2460.             zz_table = wmv1_scantable[1];

  2461. 

  2462.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2463.         ac_val2 = ac_val;

  2464.         if(dc_pred_dir) //left

  2465.             ac_val -= 16;

  2466.         else //top

  2467.             ac_val -= 16 * s->block_wrap[n];

  2468. 

  2469.         while (!last) {

  2470.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2471.             i += skip;

  2472.             if(i > 63)

  2473.                 break;

  2474.             block[zz_table[i++]] = value;

  2475.         }

  2476. 

  2477.         /* apply AC prediction if needed */

  2478.         if(s->ac_pred) {

  2479.             if(dc_pred_dir) { //left

  2480.                 for(k = 1; k < 8; k++)

  2481.                     block[k << 3] += ac_val[k];

  2482.             } else { //top

  2483.                 for(k = 1; k < 8; k++)

  2484.                     block[k] += ac_val[k + 8];

  2485.             }

  2486.         }

  2487.         /* save AC coeffs for further prediction */

  2488.         for(k = 1; k < 8; k++) {

  2489.             ac_val2[k] = block[k << 3];

  2490.             ac_val2[k + 8] = block[k];

  2491.         }

  2492. 

  2493.         /* scale AC coeffs */

  2494.         for(k = 1; k < 64; k++)

  2495.             if(block[k]) {

  2496.                 block[k] *= scale;

  2497.                 if(!v->pquantizer)

  2498.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2499.             }

  2500. 

  2501.         if(s->ac_pred) i = 63;

  2502.     }

  2503. 

  2504. not_coded:

  2505.     if(!coded) {

  2506.         int k, scale;

  2507.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2508.         ac_val2 = ac_val;

  2509. 

  2510.         i = 0;

  2511.         scale = v->pq * 2 + v->halfpq;

  2512.         memset(ac_val2, 0, 16 * 2);

  2513.         if(dc_pred_dir) {//left

  2514.             ac_val -= 16;

  2515.             if(s->ac_pred)

  2516.                 memcpy(ac_val2, ac_val, 8 * 2);

  2517.         } else {//top

  2518.             ac_val -= 16 * s->block_wrap[n];

  2519.             if(s->ac_pred)

  2520.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2521.         }

  2522. 

  2523.         /* apply AC prediction if needed */

  2524.         if(s->ac_pred) {

  2525.             if(dc_pred_dir) { //left

  2526.                 for(k = 1; k < 8; k++) {

  2527.                     block[k << 3] = ac_val[k] * scale;

  2528.                     if(!v->pquantizer && block[k << 3])

  2529.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2530.                 }

  2531.             } else { //top

  2532.                 for(k = 1; k < 8; k++) {

  2533.                     block[k] = ac_val[k + 8] * scale;

  2534.                     if(!v->pquantizer && block[k])

  2535.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2536.                 }

  2537.             }

  2538.             i = 63;

  2539.         }

  2540.     }

  2541.     s->block_last_index[n] = i;

  2542. 

  2543.     return 0;

  2544. }

  2545. 

  2546. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2547.  * @param v VC1Context

  2548.  * @param block block to decode

  2549.  * @param[in] n subblock number

  2550.  * @param coded are AC coeffs present or not

  2551.  * @param codingset set of VLC to decode data

  2552.  * @param mquant quantizer value for this macroblock

  2553.  */

  2554. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2555. {

  2556.     GetBitContext *gb = &v->s.gb;

  2557.     MpegEncContext *s = &v->s;

  2558.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2559.     int i;

  2560.     int16_t *dc_val;

  2561.     int16_t *ac_val, *ac_val2;

  2562.     int dcdiff;

  2563.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2564.     int use_pred = s->ac_pred;

  2565.     int scale;

  2566.     int q1, q2 = 0;

  2567.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2568. 

  2569.     /* Get DC differential */

  2570.     if (n < 4) {

  2571.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2572.     } else {

  2573.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2574.     }

  2575.     if (dcdiff < 0){

  2576.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2577.         return -1;

  2578.     }

  2579.     if (dcdiff)

  2580.     {

  2581.         if (dcdiff == 119 /* ESC index value */)

  2582.         {

  2583.             /* TODO: Optimize */

  2584.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2585.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2586.             else dcdiff = get_bits(gb, 8);

  2587.         }

  2588.         else

  2589.         {

  2590.             if (mquant == 1)

  2591.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2592.             else if (mquant == 2)

  2593.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2594.         }

  2595.         if (get_bits1(gb))

  2596.             dcdiff = -dcdiff;

  2597.     }

  2598. 

  2599.     /* Prediction */

  2600.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2601.     *dc_val = dcdiff;

  2602. 

  2603.     /* Store the quantized DC coeff, used for prediction */

  2604.     if (n < 4) {

  2605.         block[0] = dcdiff * s->y_dc_scale;

  2606.     } else {

  2607.         block[0] = dcdiff * s->c_dc_scale;

  2608.     }

  2609. 

  2610.     //AC Decoding

  2611.     i = 1;

  2612. 

  2613.     /* check if AC is needed at all */

  2614.     if(!a_avail && !c_avail) use_pred = 0;

  2615.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2616.     ac_val2 = ac_val;

  2617. 

  2618.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2619. 

  2620.     if(dc_pred_dir) //left

  2621.         ac_val -= 16;

  2622.     else //top

  2623.         ac_val -= 16 * s->block_wrap[n];

  2624. 

  2625.     q1 = s->current_picture.qscale_table[mb_pos];

  2626.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2627.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2628.     if(dc_pred_dir && n==1) q2 = q1;

  2629.     if(!dc_pred_dir && n==2) q2 = q1;

  2630.     if(n==3) q2 = q1;

  2631. 

  2632.     if(coded) {

  2633.         int last = 0, skip, value;

  2634.         const int8_t *zz_table;

  2635.         int k;

  2636. 

  2637.         if(v->s.ac_pred) {

  2638.             if(!dc_pred_dir)

  2639.                 zz_table = wmv1_scantable[2];

  2640.             else

  2641.                 zz_table = wmv1_scantable[3];

  2642.         } else

  2643.             zz_table = wmv1_scantable[1];

  2644. 

  2645.         while (!last) {

  2646.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2647.             i += skip;

  2648.             if(i > 63)

  2649.                 break;

  2650.             block[zz_table[i++]] = value;

  2651.         }

  2652. 

  2653.         /* apply AC prediction if needed */

  2654.         if(use_pred) {

  2655.             /* scale predictors if needed*/

  2656.             if(q2 && q1!=q2) {

  2657.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2658.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2659. 

  2660.                 if(dc_pred_dir) { //left

  2661.                     for(k = 1; k < 8; k++)

  2662.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2663.                 } else { //top

  2664.                     for(k = 1; k < 8; k++)

  2665.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2666.                 }

  2667.             } else {

  2668.                 if(dc_pred_dir) { //left

  2669.                     for(k = 1; k < 8; k++)

  2670.                         block[k << 3] += ac_val[k];

  2671.                 } else { //top

  2672.                     for(k = 1; k < 8; k++)

  2673.                         block[k] += ac_val[k + 8];

  2674.                 }

  2675.             }

  2676.         }

  2677.         /* save AC coeffs for further prediction */

  2678.         for(k = 1; k < 8; k++) {

  2679.             ac_val2[k] = block[k << 3];

  2680.             ac_val2[k + 8] = block[k];

  2681.         }

  2682. 

  2683.         /* scale AC coeffs */

  2684.         for(k = 1; k < 64; k++)

  2685.             if(block[k]) {

  2686.                 block[k] *= scale;

  2687.                 if(!v->pquantizer)

  2688.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2689.             }

  2690. 

  2691.         if(use_pred) i = 63;

  2692.     } else { // no AC coeffs

  2693.         int k;

  2694. 

  2695.         memset(ac_val2, 0, 16 * 2);

  2696.         if(dc_pred_dir) {//left

  2697.             if(use_pred) {

  2698.                 memcpy(ac_val2, ac_val, 8 * 2);

  2699.                 if(q2 && q1!=q2) {

  2700.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2701.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2702.                     for(k = 1; k < 8; k++)

  2703.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2704.                 }

  2705.             }

  2706.         } else {//top

  2707.             if(use_pred) {

  2708.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2709.                 if(q2 && q1!=q2) {

  2710.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2711.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2712.                     for(k = 1; k < 8; k++)

  2713.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2714.                 }

  2715.             }

  2716.         }

  2717. 

  2718.         /* apply AC prediction if needed */

  2719.         if(use_pred) {

  2720.             if(dc_pred_dir) { //left

  2721.                 for(k = 1; k < 8; k++) {

  2722.                     block[k << 3] = ac_val2[k] * scale;

  2723.                     if(!v->pquantizer && block[k << 3])

  2724.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2725.                 }

  2726.             } else { //top

  2727.                 for(k = 1; k < 8; k++) {

  2728.                     block[k] = ac_val2[k + 8] * scale;

  2729.                     if(!v->pquantizer && block[k])

  2730.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2731.                 }

  2732.             }

  2733.             i = 63;

  2734.         }

  2735.     }

  2736.     s->block_last_index[n] = i;

  2737. 

  2738.     return 0;

  2739. }

  2740. 

  2741. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2742.  * @param v VC1Context

  2743.  * @param block block to decode

  2744.  * @param[in] n subblock index

  2745.  * @param coded are AC coeffs present or not

  2746.  * @param mquant block quantizer

  2747.  * @param codingset set of VLC to decode data

  2748.  */

  2749. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2750. {

  2751.     GetBitContext *gb = &v->s.gb;

  2752.     MpegEncContext *s = &v->s;

  2753.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2754.     int i;

  2755.     int16_t *dc_val;

  2756.     int16_t *ac_val, *ac_val2;

  2757.     int dcdiff;

  2758.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2759.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2760.     int use_pred = s->ac_pred;

  2761.     int scale;

  2762.     int q1, q2 = 0;

  2763. 

  2764.     /* XXX: Guard against dumb values of mquant */

  2765.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2766. 

  2767.     /* Set DC scale - y and c use the same */

  2768.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2769.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2770. 

  2771.     /* Get DC differential */

  2772.     if (n < 4) {

  2773.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2774.     } else {

  2775.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2776.     }

  2777.     if (dcdiff < 0){

  2778.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2779.         return -1;

  2780.     }

  2781.     if (dcdiff)

  2782.     {

  2783.         if (dcdiff == 119 /* ESC index value */)

  2784.         {

  2785.             /* TODO: Optimize */

  2786.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2787.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2788.             else dcdiff = get_bits(gb, 8);

  2789.         }

  2790.         else

  2791.         {

  2792.             if (mquant == 1)

  2793.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2794.             else if (mquant == 2)

  2795.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2796.         }

  2797.         if (get_bits1(gb))

  2798.             dcdiff = -dcdiff;

  2799.     }

  2800. 

  2801.     /* Prediction */

  2802.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2803.     *dc_val = dcdiff;

  2804. 

  2805.     /* Store the quantized DC coeff, used for prediction */

  2806. 

  2807.     if (n < 4) {

  2808.         block[0] = dcdiff * s->y_dc_scale;

  2809.     } else {

  2810.         block[0] = dcdiff * s->c_dc_scale;

  2811.     }

  2812. 

  2813.     //AC Decoding

  2814.     i = 1;

  2815. 

  2816.     /* check if AC is needed at all and adjust direction if needed */

  2817.     if(!a_avail) dc_pred_dir = 1;

  2818.     if(!c_avail) dc_pred_dir = 0;

  2819.     if(!a_avail && !c_avail) use_pred = 0;

  2820.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2821.     ac_val2 = ac_val;

  2822. 

  2823.     scale = mquant * 2 + v->halfpq;

  2824. 

  2825.     if(dc_pred_dir) //left

  2826.         ac_val -= 16;

  2827.     else //top

  2828.         ac_val -= 16 * s->block_wrap[n];

  2829. 

  2830.     q1 = s->current_picture.qscale_table[mb_pos];

  2831.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2832.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2833.     if(dc_pred_dir && n==1) q2 = q1;

  2834.     if(!dc_pred_dir && n==2) q2 = q1;

  2835.     if(n==3) q2 = q1;

  2836. 

  2837.     if(coded) {

  2838.         int last = 0, skip, value;

  2839.         const int8_t *zz_table;

  2840.         int k;

  2841. 

  2842.         zz_table = wmv1_scantable[0];

  2843. 

  2844.         while (!last) {

  2845.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2846.             i += skip;

  2847.             if(i > 63)

  2848.                 break;

  2849.             block[zz_table[i++]] = value;

  2850.         }

  2851. 

  2852.         /* apply AC prediction if needed */

  2853.         if(use_pred) {

  2854.             /* scale predictors if needed*/

  2855.             if(q2 && q1!=q2) {

  2856.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2857.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2858. 

  2859.                 if(dc_pred_dir) { //left

  2860.                     for(k = 1; k < 8; k++)

  2861.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2862.                 } else { //top

  2863.                     for(k = 1; k < 8; k++)

  2864.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2865.                 }

  2866.             } else {

  2867.                 if(dc_pred_dir) { //left

  2868.                     for(k = 1; k < 8; k++)

  2869.                         block[k << 3] += ac_val[k];

  2870.                 } else { //top

  2871.                     for(k = 1; k < 8; k++)

  2872.                         block[k] += ac_val[k + 8];

  2873.                 }

  2874.             }

  2875.         }

  2876.         /* save AC coeffs for further prediction */

  2877.         for(k = 1; k < 8; k++) {

  2878.             ac_val2[k] = block[k << 3];

  2879.             ac_val2[k + 8] = block[k];

  2880.         }

  2881. 

  2882.         /* scale AC coeffs */

  2883.         for(k = 1; k < 64; k++)

  2884.             if(block[k]) {

  2885.                 block[k] *= scale;

  2886.                 if(!v->pquantizer)

  2887.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2888.             }

  2889. 

  2890.         if(use_pred) i = 63;

  2891.     } else { // no AC coeffs

  2892.         int k;

  2893. 

  2894.         memset(ac_val2, 0, 16 * 2);

  2895.         if(dc_pred_dir) {//left

  2896.             if(use_pred) {

  2897.                 memcpy(ac_val2, ac_val, 8 * 2);

  2898.                 if(q2 && q1!=q2) {

  2899.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2900.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2901.                     for(k = 1; k < 8; k++)

  2902.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2903.                 }

  2904.             }

  2905.         } else {//top

  2906.             if(use_pred) {

  2907.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2908.                 if(q2 && q1!=q2) {

  2909.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2910.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2911.                     for(k = 1; k < 8; k++)

  2912.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2913.                 }

  2914.             }

  2915.         }

  2916. 

  2917.         /* apply AC prediction if needed */

  2918.         if(use_pred) {

  2919.             if(dc_pred_dir) { //left

  2920.                 for(k = 1; k < 8; k++) {

  2921.                     block[k << 3] = ac_val2[k] * scale;

  2922.                     if(!v->pquantizer && block[k << 3])

  2923.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2924.                 }

  2925.             } else { //top

  2926.                 for(k = 1; k < 8; k++) {

  2927.                     block[k] = ac_val2[k + 8] * scale;

  2928.                     if(!v->pquantizer && block[k])

  2929.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2930.                 }

  2931.             }

  2932.             i = 63;

  2933.         }

  2934.     }

  2935.     s->block_last_index[n] = i;

  2936. 

  2937.     return 0;

  2938. }

  2939. 

  2940. /** Decode P block

  2941.  */

  2942. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,

  2943.                               uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left)

  2944. {

  2945.     MpegEncContext *s = &v->s;

  2946.     GetBitContext *gb = &s->gb;

  2947.     int i, j;

  2948.     int subblkpat = 0;

  2949.     int scale, off, idx, last, skip, value;

  2950.     int ttblk = ttmb & 7;

  2951.     int pat = 0;

  2952. 

  2953.     if(ttmb == -1) {

  2954.         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)];

  2955.     }

  2956.     if(ttblk == TT_4X4) {

  2957.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  2958.     }

  2959.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  2960.         subblkpat = decode012(gb);

  2961.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  2962.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  2963.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  2964.     }

  2965.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  2966. 

  2967.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  2968.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  2969.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  2970.         ttblk = TT_8X4;

  2971.     }

  2972.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  2973.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  2974.         ttblk = TT_4X8;

  2975.     }

  2976.     switch(ttblk) {

  2977.     case TT_8X8:

  2978.         pat = 0xF;

  2979.         i = 0;

  2980.         last = 0;

  2981.         while (!last) {

  2982.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2983.             i += skip;

  2984.             if(i > 63)

  2985.                 break;

  2986.             idx = wmv1_scantable[0][i++];

  2987.             block[idx] = value * scale;

  2988.             if(!v->pquantizer)

  2989.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  2990.         }

  2991.         if(!skip_block){

  2992.             s->dsp.vc1_inv_trans_8x8(block);

  2993.             s->dsp.add_pixels_clamped(block, dst, linesize);

  2994.             if(apply_filter && cbp_top  & 0xC)

  2995.                 s->dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  2996.             if(apply_filter && cbp_left & 0xA)

  2997.                 s->dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  2998.         }

  2999.         break;

  3000.     case TT_4X4:

  3001.         pat = ~subblkpat & 0xF;

  3002.         for(j = 0; j < 4; j++) {

  3003.             last = subblkpat & (1 << (3 - j));

  3004.             i = 0;

  3005.             off = (j & 1) * 4 + (j & 2) * 16;

  3006.             while (!last) {

  3007.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3008.                 i += skip;

  3009.                 if(i > 15)

  3010.                     break;

  3011.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3012.                 block[idx + off] = value * scale;

  3013.                 if(!v->pquantizer)

  3014.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3015.             }

  3016.             if(!(subblkpat & (1 << (3 - j))) && !skip_block){

  3017.                 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);

  3018.                 if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2)))))

  3019.                     s->dsp.vc1_v_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  3020.                 if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1)))))

  3021.                     s->dsp.vc1_h_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  3022.             }

  3023.         }

  3024.         break;

  3025.     case TT_8X4:

  3026.         pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF;

  3027.         for(j = 0; j < 2; j++) {

  3028.             last = subblkpat & (1 << (1 - j));

  3029.             i = 0;

  3030.             off = j * 32;

  3031.             while (!last) {

  3032.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3033.                 i += skip;

  3034.                 if(i > 31)

  3035.                     break;

  3036.                 idx = v->zz_8x4[i++]+off;

  3037.                 block[idx] = value * scale;

  3038.                 if(!v->pquantizer)

  3039.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3040.             }

  3041.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3042.                 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);

  3043.                 if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC))

  3044.                     s->dsp.vc1_v_loop_filter8(dst + j*4*linesize, linesize, v->pq);

  3045.                 if(apply_filter && cbp_left & (2 << j))

  3046.                     s->dsp.vc1_h_loop_filter4(dst + j*4*linesize, linesize, v->pq);

  3047.             }

  3048.         }

  3049.         break;

  3050.     case TT_4X8:

  3051.         pat = ~(subblkpat*5) & 0xF;

  3052.         for(j = 0; j < 2; j++) {

  3053.             last = subblkpat & (1 << (1 - j));

  3054.             i = 0;

  3055.             off = j * 4;

  3056.             while (!last) {

  3057.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3058.                 i += skip;

  3059.                 if(i > 31)

  3060.                     break;

  3061.                 idx = v->zz_4x8[i++]+off;

  3062.                 block[idx] = value * scale;

  3063.                 if(!v->pquantizer)

  3064.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3065.             }

  3066.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3067.                 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3068.                 if(apply_filter && cbp_top & (2 << j))

  3069.                     s->dsp.vc1_v_loop_filter4(dst + j*4, linesize, v->pq);

  3070.                 if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA))

  3071.                     s->dsp.vc1_h_loop_filter8(dst + j*4, linesize, v->pq);

  3072.             }

  3073.         }

  3074.         break;

  3075.     }

  3076.     return pat;

  3077. }

  3078. 

  3079. /** @} */ // Macroblock group

  3080. 

  3081. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3082. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3083. 

  3084. /** Decode one P-frame MB (in Simple/Main profile)

  3085.  */

  3086. static int vc1_decode_p_mb(VC1Context *v)

  3087. {

  3088.     MpegEncContext *s = &v->s;

  3089.     GetBitContext *gb = &s->gb;

  3090.     int i, j;

  3091.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3092.     int cbp; /* cbp decoding stuff */

  3093.     int mqdiff, mquant; /* MB quantization */

  3094.     int ttmb = v->ttfrm; /* MB Transform type */

  3095. 

  3096.     int mb_has_coeffs = 1; /* last_flag */

  3097.     int dmv_x, dmv_y; /* Differential MV components */

  3098.     int index, index1; /* LUT indexes */

  3099.     int val, sign; /* temp values */

  3100.     int first_block = 1;

  3101.     int dst_idx, off;

  3102.     int skipped, fourmv;

  3103.     int block_cbp = 0, pat;

  3104.     int apply_loop_filter;

  3105. 

  3106.     mquant = v->pq; /* Loosy initialization */

  3107. 

  3108.     if (v->mv_type_is_raw)

  3109.         fourmv = get_bits1(gb);

  3110.     else

  3111.         fourmv = v->mv_type_mb_plane[mb_pos];

  3112.     if (v->skip_is_raw)

  3113.         skipped = get_bits1(gb);

  3114.     else

  3115.         skipped = v->s.mbskip_table[mb_pos];

  3116. 

  3117.     s->dsp.clear_blocks(s->block[0]);

  3118. 

  3119.     apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  3120.     if (!fourmv) /* 1MV mode */

  3121.     {

  3122.         if (!skipped)

  3123.         {

  3124.             GET_MVDATA(dmv_x, dmv_y);

  3125. 

  3126.             if (s->mb_intra) {

  3127.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3128.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3129.             }

  3130.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3131.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3132. 

  3133.             /* FIXME Set DC val for inter block ? */

  3134.             if (s->mb_intra && !mb_has_coeffs)

  3135.             {

  3136.                 GET_MQUANT();

  3137.                 s->ac_pred = get_bits1(gb);

  3138.                 cbp = 0;

  3139.             }

  3140.             else if (mb_has_coeffs)

  3141.             {

  3142.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3143.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3144.                 GET_MQUANT();

  3145.             }

  3146.             else

  3147.             {

  3148.                 mquant = v->pq;

  3149.                 cbp = 0;

  3150.             }

  3151.             s->current_picture.qscale_table[mb_pos] = mquant;

  3152. 

  3153.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3154.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3155.                                 VC1_TTMB_VLC_BITS, 2);

  3156.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3157.             dst_idx = 0;

  3158.             for (i=0; i<6; i++)

  3159.             {

  3160.                 s->dc_val[0][s->block_index[i]] = 0;

  3161.                 dst_idx += i >> 2;

  3162.                 val = ((cbp >> (5 - i)) & 1);

  3163.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3164.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3165.                 if(s->mb_intra) {

  3166.                     /* check if prediction blocks A and C are available */

  3167.                     v->a_avail = v->c_avail = 0;

  3168.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3169.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3170.                     if(i == 1 || i == 3 || s->mb_x)

  3171.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3172. 

  3173.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3174.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3175.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3176.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3177.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3178.                     if(v->pq >= 9 && v->overlap) {

  3179.                         if(v->c_avail)

  3180.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3181.                         if(v->a_avail)

  3182.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3183.                     }

  3184.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3185.                         int left_cbp, top_cbp;

  3186.                         if(i & 4){

  3187.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3188.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3189.                         }else{

  3190.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3191.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3192.                         }

  3193.                         if(left_cbp & 0xC)

  3194.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3195.                         if(top_cbp  & 0xA)

  3196.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3197.                     }

  3198.                     block_cbp |= 0xF << (i << 2);

  3199.                 } else if(val) {

  3200.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3201.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3202.                         filter = 1;

  3203.                         if(i & 4){

  3204.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3205.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3206.                         }else{

  3207.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3208.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3209.                         }

  3210.                         if(left_cbp & 0xC)

  3211.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3212.                         if(top_cbp  & 0xA)

  3213.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3214.                     }

  3215.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp);

  3216.                     block_cbp |= pat << (i << 2);

  3217.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3218.                     first_block = 0;

  3219.                 }

  3220.             }

  3221.         }

  3222.         else //Skipped

  3223.         {

  3224.             s->mb_intra = 0;

  3225.             for(i = 0; i < 6; i++) {

  3226.                 v->mb_type[0][s->block_index[i]] = 0;

  3227.                 s->dc_val[0][s->block_index[i]] = 0;

  3228.             }

  3229.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3230.             s->current_picture.qscale_table[mb_pos] = 0;

  3231.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3232.             vc1_mc_1mv(v, 0);

  3233.             return 0;

  3234.         }

  3235.     } //1MV mode

  3236.     else //4MV mode

  3237.     {

  3238.         if (!skipped /* unskipped MB */)

  3239.         {

  3240.             int intra_count = 0, coded_inter = 0;

  3241.             int is_intra[6], is_coded[6];

  3242.             /* Get CBPCY */

  3243.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3244.             for (i=0; i<6; i++)

  3245.             {

  3246.                 val = ((cbp >> (5 - i)) & 1);

  3247.                 s->dc_val[0][s->block_index[i]] = 0;

  3248.                 s->mb_intra = 0;

  3249.                 if(i < 4) {

  3250.                     dmv_x = dmv_y = 0;

  3251.                     s->mb_intra = 0;

  3252.                     mb_has_coeffs = 0;

  3253.                     if(val) {

  3254.                         GET_MVDATA(dmv_x, dmv_y);

  3255.                     }

  3256.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3257.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3258.                     intra_count += s->mb_intra;

  3259.                     is_intra[i] = s->mb_intra;

  3260.                     is_coded[i] = mb_has_coeffs;

  3261.                 }

  3262.                 if(i&4){

  3263.                     is_intra[i] = (intra_count >= 3);

  3264.                     is_coded[i] = val;

  3265.                 }

  3266.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3267.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3268.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3269.             }

  3270.             // if there are no coded blocks then don't do anything more

  3271.             if(!intra_count && !coded_inter) return 0;

  3272.             dst_idx = 0;

  3273.             GET_MQUANT();

  3274.             s->current_picture.qscale_table[mb_pos] = mquant;

  3275.             /* test if block is intra and has pred */

  3276.             {

  3277.                 int intrapred = 0;

  3278.                 for(i=0; i<6; i++)

  3279.                     if(is_intra[i]) {

  3280.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3281.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3282.                             intrapred = 1;

  3283.                             break;

  3284.                         }

  3285.                     }

  3286.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3287.                 else s->ac_pred = 0;

  3288.             }

  3289.             if (!v->ttmbf && coded_inter)

  3290.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3291.             for (i=0; i<6; i++)

  3292.             {

  3293.                 dst_idx += i >> 2;

  3294.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3295.                 s->mb_intra = is_intra[i];

  3296.                 if (is_intra[i]) {

  3297.                     /* check if prediction blocks A and C are available */

  3298.                     v->a_avail = v->c_avail = 0;

  3299.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3300.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3301.                     if(i == 1 || i == 3 || s->mb_x)

  3302.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3303. 

  3304.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3305.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3306.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3307.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3308.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3309.                     if(v->pq >= 9 && v->overlap) {

  3310.                         if(v->c_avail)

  3311.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3312.                         if(v->a_avail)

  3313.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3314.                     }

  3315.                     if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3316.                         int left_cbp, top_cbp;

  3317.                         if(i & 4){

  3318.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3319.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3320.                         }else{

  3321.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3322.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3323.                         }

  3324.                         if(left_cbp & 0xC)

  3325.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3326.                         if(top_cbp  & 0xA)

  3327.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3328.                     }

  3329.                     block_cbp |= 0xF << (i << 2);

  3330.                 } else if(is_coded[i]) {

  3331.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3332.                     if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3333.                         filter = 1;

  3334.                         if(i & 4){

  3335.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3336.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3337.                         }else{

  3338.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3339.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3340.                         }

  3341.                         if(left_cbp & 0xC)

  3342.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3343.                         if(top_cbp  & 0xA)

  3344.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3345.                     }

  3346.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp);

  3347.                     block_cbp |= pat << (i << 2);

  3348.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3349.                     first_block = 0;

  3350.                 }

  3351.             }

  3352.             return 0;

  3353.         }

  3354.         else //Skipped MB

  3355.         {

  3356.             s->mb_intra = 0;

  3357.             s->current_picture.qscale_table[mb_pos] = 0;

  3358.             for (i=0; i<6; i++) {

  3359.                 v->mb_type[0][s->block_index[i]] = 0;

  3360.                 s->dc_val[0][s->block_index[i]] = 0;

  3361.             }

  3362.             for (i=0; i<4; i++)

  3363.             {

  3364.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3365.                 vc1_mc_4mv_luma(v, i);

  3366.             }

  3367.             vc1_mc_4mv_chroma(v);

  3368.             s->current_picture.qscale_table[mb_pos] = 0;

  3369.             return 0;

  3370.         }

  3371.     }

  3372.     v->cbp[s->mb_x] = block_cbp;

  3373. 

  3374.     /* Should never happen */

  3375.     return -1;

  3376. }

  3377. 

  3378. /** Decode one B-frame MB (in Main profile)

  3379.  */

  3380. static void vc1_decode_b_mb(VC1Context *v)

  3381. {

  3382.     MpegEncContext *s = &v->s;

  3383.     GetBitContext *gb = &s->gb;

  3384.     int i, j;

  3385.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3386.     int cbp = 0; /* cbp decoding stuff */

  3387.     int mqdiff, mquant; /* MB quantization */

  3388.     int ttmb = v->ttfrm; /* MB Transform type */

  3389.     int mb_has_coeffs = 0; /* last_flag */

  3390.     int index, index1; /* LUT indexes */

  3391.     int val, sign; /* temp values */

  3392.     int first_block = 1;

  3393.     int dst_idx, off;

  3394.     int skipped, direct;

  3395.     int dmv_x[2], dmv_y[2];

  3396.     int bmvtype = BMV_TYPE_BACKWARD;

  3397. 

  3398.     mquant = v->pq; /* Loosy initialization */

  3399.     s->mb_intra = 0;

  3400. 

  3401.     if (v->dmb_is_raw)

  3402.         direct = get_bits1(gb);

  3403.     else

  3404.         direct = v->direct_mb_plane[mb_pos];

  3405.     if (v->skip_is_raw)

  3406.         skipped = get_bits1(gb);

  3407.     else

  3408.         skipped = v->s.mbskip_table[mb_pos];

  3409. 

  3410.     s->dsp.clear_blocks(s->block[0]);

  3411.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3412.     for(i = 0; i < 6; i++) {

  3413.         v->mb_type[0][s->block_index[i]] = 0;

  3414.         s->dc_val[0][s->block_index[i]] = 0;

  3415.     }

  3416.     s->current_picture.qscale_table[mb_pos] = 0;

  3417. 

  3418.     if (!direct) {

  3419.         if (!skipped) {

  3420.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3421.             dmv_x[1] = dmv_x[0];

  3422.             dmv_y[1] = dmv_y[0];

  3423.         }

  3424.         if(skipped || !s->mb_intra) {

  3425.             bmvtype = decode012(gb);

  3426.             switch(bmvtype) {

  3427.             case 0:

  3428.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3429.                 break;

  3430.             case 1:

  3431.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3432.                 break;

  3433.             case 2:

  3434.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3435.                 dmv_x[0] = dmv_y[0] = 0;

  3436.             }

  3437.         }

  3438.     }

  3439.     for(i = 0; i < 6; i++)

  3440.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3441. 

  3442.     if (skipped) {

  3443.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3444.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3445.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3446.         return;

  3447.     }

  3448.     if (direct) {

  3449.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3450.         GET_MQUANT();

  3451.         s->mb_intra = 0;

  3452.         s->current_picture.qscale_table[mb_pos] = mquant;

  3453.         if(!v->ttmbf)

  3454.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3455.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3456.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3457.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3458.     } else {

  3459.         if(!mb_has_coeffs && !s->mb_intra) {

  3460.             /* no coded blocks - effectively skipped */

  3461.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3462.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3463.             return;

  3464.         }

  3465.         if(s->mb_intra && !mb_has_coeffs) {

  3466.             GET_MQUANT();

  3467.             s->current_picture.qscale_table[mb_pos] = mquant;

  3468.             s->ac_pred = get_bits1(gb);

  3469.             cbp = 0;

  3470.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3471.         } else {

  3472.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3473.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3474.                 if(!mb_has_coeffs) {

  3475.                     /* interpolated skipped block */

  3476.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3477.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3478.                     return;

  3479.                 }

  3480.             }

  3481.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3482.             if(!s->mb_intra) {

  3483.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3484.             }

  3485.             if(s->mb_intra)

  3486.                 s->ac_pred = get_bits1(gb);

  3487.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3488.             GET_MQUANT();

  3489.             s->current_picture.qscale_table[mb_pos] = mquant;

  3490.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3491.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3492.         }

  3493.     }

  3494.     dst_idx = 0;

  3495.     for (i=0; i<6; i++)

  3496.     {

  3497.         s->dc_val[0][s->block_index[i]] = 0;

  3498.         dst_idx += i >> 2;

  3499.         val = ((cbp >> (5 - i)) & 1);

  3500.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3501.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3502.         if(s->mb_intra) {

  3503.             /* check if prediction blocks A and C are available */

  3504.             v->a_avail = v->c_avail = 0;

  3505.             if(i == 2 || i == 3 || !s->first_slice_line)

  3506.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3507.             if(i == 1 || i == 3 || s->mb_x)

  3508.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3509. 

  3510.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3511.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3512.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3513.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3514.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3515.         } else if(val) {

  3516.             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), 0, 0, 0);

  3517.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3518.             first_block = 0;

  3519.         }

  3520.     }

  3521. }

  3522. 

  3523. /** Decode blocks of I-frame

  3524.  */

  3525. static void vc1_decode_i_blocks(VC1Context *v)

  3526. {

  3527.     int k, j;

  3528.     MpegEncContext *s = &v->s;

  3529.     int cbp, val;

  3530.     uint8_t *coded_val;

  3531.     int mb_pos;

  3532. 

  3533.     /* select codingmode used for VLC tables selection */

  3534.     switch(v->y_ac_table_index){

  3535.     case 0:

  3536.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3537.         break;

  3538.     case 1:

  3539.         v->codingset = CS_HIGH_MOT_INTRA;

  3540.         break;

  3541.     case 2:

  3542.         v->codingset = CS_MID_RATE_INTRA;

  3543.         break;

  3544.     }

  3545. 

  3546.     switch(v->c_ac_table_index){

  3547.     case 0:

  3548.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3549.         break;

  3550.     case 1:

  3551.         v->codingset2 = CS_HIGH_MOT_INTER;

  3552.         break;

  3553.     case 2:

  3554.         v->codingset2 = CS_MID_RATE_INTER;

  3555.         break;

  3556.     }

  3557. 

  3558.     /* Set DC scale - y and c use the same */

  3559.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3560.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3561. 

  3562.     //do frame decode

  3563.     s->mb_x = s->mb_y = 0;

  3564.     s->mb_intra = 1;

  3565.     s->first_slice_line = 1;

  3566.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3567.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3568.             ff_init_block_index(s);

  3569.             ff_update_block_index(s);

  3570.             s->dsp.clear_blocks(s->block[0]);

  3571.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3572.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3573.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3574.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3575.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3576. 

  3577.             // do actual MB decoding and displaying

  3578.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3579.             v->s.ac_pred = get_bits1(&v->s.gb);

  3580. 

  3581.             for(k = 0; k < 6; k++) {

  3582.                 val = ((cbp >> (5 - k)) & 1);

  3583. 

  3584.                 if (k < 4) {

  3585.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3586.                     val = val ^ pred;

  3587.                     *coded_val = val;

  3588.                 }

  3589.                 cbp |= val << (5 - k);

  3590. 

  3591.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3592. 

  3593.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3594.                 if(v->pq >= 9 && v->overlap) {

  3595.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3596.                 }

  3597.             }

  3598. 

  3599.             vc1_put_block(v, s->block);

  3600.             if(v->pq >= 9 && v->overlap) {

  3601.                 if(s->mb_x) {

  3602.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3603.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3604.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3605.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3606.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3607.                     }

  3608.                 }

  3609.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3610.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3611.                 if(!s->first_slice_line) {

  3612.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3613.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3614.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3615.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3616.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3617.                     }

  3618.                 }

  3619.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3620.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3621.             }

  3622.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3623. 

  3624.             if(get_bits_count(&s->gb) > v->bits) {

  3625.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3626.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3627.                 return;

  3628.             }

  3629.         }

  3630.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3631.         s->first_slice_line = 0;

  3632.     }

  3633.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3634. }

  3635. 

  3636. /** Decode blocks of I-frame for advanced profile

  3637.  */

  3638. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3639. {

  3640.     int k, j;

  3641.     MpegEncContext *s = &v->s;

  3642.     int cbp, val;

  3643.     uint8_t *coded_val;

  3644.     int mb_pos;

  3645.     int mquant = v->pq;

  3646.     int mqdiff;

  3647.     int overlap;

  3648.     GetBitContext *gb = &s->gb;

  3649. 

  3650.     /* select codingmode used for VLC tables selection */

  3651.     switch(v->y_ac_table_index){

  3652.     case 0:

  3653.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3654.         break;

  3655.     case 1:

  3656.         v->codingset = CS_HIGH_MOT_INTRA;

  3657.         break;

  3658.     case 2:

  3659.         v->codingset = CS_MID_RATE_INTRA;

  3660.         break;

  3661.     }

  3662. 

  3663.     switch(v->c_ac_table_index){

  3664.     case 0:

  3665.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3666.         break;

  3667.     case 1:

  3668.         v->codingset2 = CS_HIGH_MOT_INTER;

  3669.         break;

  3670.     case 2:

  3671.         v->codingset2 = CS_MID_RATE_INTER;

  3672.         break;

  3673.     }

  3674. 

  3675.     //do frame decode

  3676.     s->mb_x = s->mb_y = 0;

  3677.     s->mb_intra = 1;

  3678.     s->first_slice_line = 1;

  3679.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3680.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3681.             ff_init_block_index(s);

  3682.             ff_update_block_index(s);

  3683.             s->dsp.clear_blocks(s->block[0]);

  3684.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3685.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3686.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3687.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3688. 

  3689.             // do actual MB decoding and displaying

  3690.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3691.             if(v->acpred_is_raw)

  3692.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3693.             else

  3694.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3695. 

  3696.             if(v->condover == CONDOVER_SELECT) {

  3697.                 if(v->overflg_is_raw)

  3698.                     overlap = get_bits1(&v->s.gb);

  3699.                 else

  3700.                     overlap = v->over_flags_plane[mb_pos];

  3701.             } else

  3702.                 overlap = (v->condover == CONDOVER_ALL);

  3703. 

  3704.             GET_MQUANT();

  3705. 

  3706.             s->current_picture.qscale_table[mb_pos] = mquant;

  3707.             /* Set DC scale - y and c use the same */

  3708.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3709.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3710. 

  3711.             for(k = 0; k < 6; k++) {

  3712.                 val = ((cbp >> (5 - k)) & 1);

  3713. 

  3714.                 if (k < 4) {

  3715.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3716.                     val = val ^ pred;

  3717.                     *coded_val = val;

  3718.                 }

  3719.                 cbp |= val << (5 - k);

  3720. 

  3721.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3722.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3723. 

  3724.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3725. 

  3726.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3727.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3728.             }

  3729. 

  3730.             vc1_put_block(v, s->block);

  3731.             if(overlap) {

  3732.                 if(s->mb_x) {

  3733.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3734.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3735.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3736.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3737.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3738.                     }

  3739.                 }

  3740.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3741.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3742.                 if(!s->first_slice_line) {

  3743.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3744.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3745.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3746.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3747.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3748.                     }

  3749.                 }

  3750.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3751.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3752.             }

  3753.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3754. 

  3755.             if(get_bits_count(&s->gb) > v->bits) {

  3756.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3757.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3758.                 return;

  3759.             }

  3760.         }

  3761.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3762.         s->first_slice_line = 0;

  3763.     }

  3764.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3765. }

  3766. 

  3767. static void vc1_decode_p_blocks(VC1Context *v)

  3768. {

  3769.     MpegEncContext *s = &v->s;

  3770. 

  3771.     /* select codingmode used for VLC tables selection */

  3772.     switch(v->c_ac_table_index){

  3773.     case 0:

  3774.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3775.         break;

  3776.     case 1:

  3777.         v->codingset = CS_HIGH_MOT_INTRA;

  3778.         break;

  3779.     case 2:

  3780.         v->codingset = CS_MID_RATE_INTRA;

  3781.         break;

  3782.     }

  3783. 

  3784.     switch(v->c_ac_table_index){

  3785.     case 0:

  3786.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3787.         break;

  3788.     case 1:

  3789.         v->codingset2 = CS_HIGH_MOT_INTER;

  3790.         break;

  3791.     case 2:

  3792.         v->codingset2 = CS_MID_RATE_INTER;

  3793.         break;

  3794.     }

  3795. 

  3796.     s->first_slice_line = 1;

  3797.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  3798.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3799.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3800.             ff_init_block_index(s);

  3801.             ff_update_block_index(s);

  3802.             s->dsp.clear_blocks(s->block[0]);

  3803. 

  3804.             vc1_decode_p_mb(v);

  3805.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3806.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3807.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);

  3808.                 return;

  3809.             }

  3810.         }

  3811.         memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride);

  3812.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3813.         s->first_slice_line = 0;

  3814.     }

  3815.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3816. }

  3817. 

  3818. static void vc1_decode_b_blocks(VC1Context *v)

  3819. {

  3820.     MpegEncContext *s = &v->s;

  3821. 

  3822.     /* select codingmode used for VLC tables selection */

  3823.     switch(v->c_ac_table_index){

  3824.     case 0:

  3825.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3826.         break;

  3827.     case 1:

  3828.         v->codingset = CS_HIGH_MOT_INTRA;

  3829.         break;

  3830.     case 2:

  3831.         v->codingset = CS_MID_RATE_INTRA;

  3832.         break;

  3833.     }

  3834. 

  3835.     switch(v->c_ac_table_index){

  3836.     case 0:

  3837.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3838.         break;

  3839.     case 1:

  3840.         v->codingset2 = CS_HIGH_MOT_INTER;

  3841.         break;

  3842.     case 2:

  3843.         v->codingset2 = CS_MID_RATE_INTER;

  3844.         break;

  3845.     }

  3846. 

  3847.     s->first_slice_line = 1;

  3848.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3849.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3850.             ff_init_block_index(s);

  3851.             ff_update_block_index(s);

  3852.             s->dsp.clear_blocks(s->block[0]);

  3853. 

  3854.             vc1_decode_b_mb(v);

  3855.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3856.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3857.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);

  3858.                 return;

  3859.             }

  3860.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3861.         }

  3862.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3863.         s->first_slice_line = 0;

  3864.     }

  3865.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3866. }

  3867. 

  3868. static void vc1_decode_skip_blocks(VC1Context *v)

  3869. {

  3870.     MpegEncContext *s = &v->s;

  3871. 

  3872.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3873.     s->first_slice_line = 1;

  3874.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3875.         s->mb_x = 0;

  3876.         ff_init_block_index(s);

  3877.         ff_update_block_index(s);

  3878.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3879.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3880.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3881.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3882.         s->first_slice_line = 0;

  3883.     }

  3884.     s->pict_type = FF_P_TYPE;

  3885. }

  3886. 

  3887. static void vc1_decode_blocks(VC1Context *v)

  3888. {

  3889. 

  3890.     v->s.esc3_level_length = 0;

  3891.     if(v->x8_type){

  3892.         ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );

  3893.     }else{

  3894. 

  3895.         switch(v->s.pict_type) {

  3896.         case FF_I_TYPE:

  3897.             if(v->profile == PROFILE_ADVANCED)

  3898.                 vc1_decode_i_blocks_adv(v);

  3899.             else

  3900.                 vc1_decode_i_blocks(v);

  3901.             break;

  3902.         case FF_P_TYPE:

  3903.             if(v->p_frame_skipped)

  3904.                 vc1_decode_skip_blocks(v);

  3905.             else

  3906.                 vc1_decode_p_blocks(v);

  3907.             break;

  3908.         case FF_B_TYPE:

  3909.             if(v->bi_type){

  3910.                 if(v->profile == PROFILE_ADVANCED)

  3911.                     vc1_decode_i_blocks_adv(v);

  3912.                 else

  3913.                     vc1_decode_i_blocks(v);

  3914.             }else

  3915.                 vc1_decode_b_blocks(v);

  3916.             break;

  3917.         }

  3918.     }

  3919. }

  3920. 

  3921. /** Initialize a VC1/WMV3 decoder

  3922.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3923.  * @todo TODO: Decypher remaining bits in extra_data

  3924.  */

  3925. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  3926. {

  3927.     VC1Context *v = avctx->priv_data;

  3928.     MpegEncContext *s = &v->s;

  3929.     GetBitContext gb;

  3930. 

  3931.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  3932.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  3933.         avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);

  3934.     else

  3935.         avctx->pix_fmt = PIX_FMT_GRAY8;

  3936.     avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);

  3937.     v->s.avctx = avctx;

  3938.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  3939.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  3940. 

  3941.     if(avctx->idct_algo==FF_IDCT_AUTO){

  3942.         avctx->idct_algo=FF_IDCT_WMV2;

  3943.     }

  3944. 

  3945.     if(ff_h263_decode_init(avctx) < 0)

  3946.         return -1;

  3947.     if (vc1_init_common(v) < 0) return -1;

  3948. 

  3949.     avctx->coded_width = avctx->width;

  3950.     avctx->coded_height = avctx->height;

  3951.     if (avctx->codec_id == CODEC_ID_WMV3)

  3952.     {

  3953.         int count = 0;

  3954. 

  3955.         // looks like WMV3 has a sequence header stored in the extradata

  3956.         // advanced sequence header may be before the first frame

  3957.         // the last byte of the extradata is a version number, 1 for the

  3958.         // samples we can decode

  3959. 

  3960.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  3961. 

  3962.         if (vc1_decode_sequence_header(avctx, v, &gb) < 0)

  3963.           return -1;

  3964. 

  3965.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  3966.         if (count>0)

  3967.         {

  3968.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  3969.                    count, get_bits(&gb, count));

  3970.         }

  3971.         else if (count < 0)

  3972.         {

  3973.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  3974.         }

  3975.     } else { // VC1/WVC1

  3976.         const uint8_t *start = avctx->extradata;

  3977.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  3978.         const uint8_t *next;

  3979.         int size, buf2_size;

  3980.         uint8_t *buf2 = NULL;

  3981.         int seq_initialized = 0, ep_initialized = 0;

  3982. 

  3983.         if(avctx->extradata_size < 16) {

  3984.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  3985.             return -1;

  3986.         }

  3987. 

  3988.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  3989.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  3990.         next = start;

  3991.         for(; next < end; start = next){

  3992.             next = find_next_marker(start + 4, end);

  3993.             size = next - start - 4;

  3994.             if(size <= 0) continue;

  3995.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  3996.             init_get_bits(&gb, buf2, buf2_size * 8);

  3997.             switch(AV_RB32(start)){

  3998.             case VC1_CODE_SEQHDR:

  3999.                 if(vc1_decode_sequence_header(avctx, v, &gb) < 0){

  4000.                     av_free(buf2);

  4001.                     return -1;

  4002.                 }

  4003.                 seq_initialized = 1;

  4004.                 break;

  4005.             case VC1_CODE_ENTRYPOINT:

  4006.                 if(vc1_decode_entry_point(avctx, v, &gb) < 0){

  4007.                     av_free(buf2);

  4008.                     return -1;

  4009.                 }

  4010.                 ep_initialized = 1;

  4011.                 break;

  4012.             }

  4013.         }

  4014.         av_free(buf2);

  4015.         if(!seq_initialized || !ep_initialized){

  4016.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4017.             return -1;

  4018.         }

  4019.     }

  4020.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4021.     s->low_delay = !avctx->has_b_frames;

  4022. 

  4023.     s->mb_width = (avctx->coded_width+15)>>4;

  4024.     s->mb_height = (avctx->coded_height+15)>>4;

  4025. 

  4026.     /* Allocate mb bitplanes */

  4027.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4028.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4029.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4030.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4031. 

  4032.     v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  4033.     v->cbp = v->cbp_base + s->mb_stride;

  4034. 

  4035.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4036.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4037.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4038.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4039.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4040. 

  4041.     /* Init coded blocks info */

  4042.     if (v->profile == PROFILE_ADVANCED)

  4043.     {

  4044. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4045. //            return -1;

  4046. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4047. //            return -1;

  4048.     }

  4049. 

  4050.     ff_intrax8_common_init(&v->x8,s);

  4051.     return 0;

  4052. }

  4053. 

  4054. 

  4055. /** Decode a VC1/WMV3 frame

  4056.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4057.  */

  4058. static int vc1_decode_frame(AVCodecContext *avctx,

  4059.                             void *data, int *data_size,

  4060.                             AVPacket *avpkt)

  4061. {

  4062.     const uint8_t *buf = avpkt->data;

  4063.     int buf_size = avpkt->size;

  4064.     VC1Context *v = avctx->priv_data;

  4065.     MpegEncContext *s = &v->s;

  4066.     AVFrame *pict = data;

  4067.     uint8_t *buf2 = NULL;

  4068.     const uint8_t *buf_start = buf;

  4069. 

  4070.     /* no supplementary picture */

  4071.     if (buf_size == 0) {

  4072.         /* special case for last picture */

  4073.         if (s->low_delay==0 && s->next_picture_ptr) {

  4074.             *pict= *(AVFrame*)s->next_picture_ptr;

  4075.             s->next_picture_ptr= NULL;

  4076. 

  4077.             *data_size = sizeof(AVFrame);

  4078.         }

  4079. 

  4080.         return 0;

  4081.     }

  4082. 

  4083.     /* We need to set current_picture_ptr before reading the header,

  4084.      * otherwise we cannot store anything in there. */

  4085.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4086.         int i= ff_find_unused_picture(s, 0);

  4087.         s->current_picture_ptr= &s->picture[i];

  4088.     }

  4089. 

  4090.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){

  4091.         if (v->profile < PROFILE_ADVANCED)

  4092.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  4093.         else

  4094.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  4095.     }

  4096. 

  4097.     //for advanced profile we may need to parse and unescape data

  4098.     if (avctx->codec_id == CODEC_ID_VC1) {

  4099.         int buf_size2 = 0;

  4100.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4101. 

  4102.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4103.             const uint8_t *start, *end, *next;

  4104.             int size;

  4105. 

  4106.             next = buf;

  4107.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4108.                 next = find_next_marker(start + 4, end);

  4109.                 size = next - start - 4;

  4110.                 if(size <= 0) continue;

  4111.                 switch(AV_RB32(start)){

  4112.                 case VC1_CODE_FRAME:

  4113.                     if (avctx->hwaccel ||

  4114.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4115.                         buf_start = start;

  4116.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4117.                     break;

  4118.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4119.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4120.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4121.                     vc1_decode_entry_point(avctx, v, &s->gb);

  4122.                     break;

  4123.                 case VC1_CODE_SLICE:

  4124.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4125.                     av_free(buf2);

  4126.                     return -1;

  4127.                 }

  4128.             }

  4129.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4130.             const uint8_t *divider;

  4131. 

  4132.             divider = find_next_marker(buf, buf + buf_size);

  4133.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4134.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4135.                 av_free(buf2);

  4136.                 return -1;

  4137.             }

  4138. 

  4139.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4140.             // TODO

  4141.             av_free(buf2);return -1;

  4142.         }else{

  4143.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4144.         }

  4145.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4146.     } else

  4147.         init_get_bits(&s->gb, buf, buf_size*8);

  4148.     // do parse frame header

  4149.     if(v->profile < PROFILE_ADVANCED) {

  4150.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4151.             av_free(buf2);

  4152.             return -1;

  4153.         }

  4154.     } else {

  4155.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4156.             av_free(buf2);

  4157.             return -1;

  4158.         }

  4159.     }

  4160. 

  4161.     if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){

  4162.         av_free(buf2);

  4163.         return -1;

  4164.     }

  4165. 

  4166.     // for hurry_up==5

  4167.     s->current_picture.pict_type= s->pict_type;

  4168.     s->current_picture.key_frame= s->pict_type == FF_I_TYPE;

  4169. 

  4170.     /* skip B-frames if we don't have reference frames */

  4171.     if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){

  4172.         av_free(buf2);

  4173.         return -1;//buf_size;

  4174.     }

  4175.     /* skip b frames if we are in a hurry */

  4176.     if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;

  4177.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)

  4178.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)

  4179.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4180.         av_free(buf2);

  4181.         return buf_size;

  4182.     }

  4183.     /* skip everything if we are in a hurry>=5 */

  4184.     if(avctx->hurry_up>=5) {

  4185.         av_free(buf2);

  4186.         return -1;//buf_size;

  4187.     }

  4188. 

  4189.     if(s->next_p_frame_damaged){

  4190.         if(s->pict_type==FF_B_TYPE)

  4191.             return buf_size;

  4192.         else

  4193.             s->next_p_frame_damaged=0;

  4194.     }

  4195. 

  4196.     if(MPV_frame_start(s, avctx) < 0) {

  4197.         av_free(buf2);

  4198.         return -1;

  4199.     }

  4200. 

  4201.     s->me.qpel_put= s->dsp.put_qpel_pixels_tab;

  4202.     s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;

  4203. 

  4204.     if ((CONFIG_VC1_VDPAU_DECODER || CONFIG_WMV3_VDPAU_DECODER)

  4205.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4206.         ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  4207.     else if (avctx->hwaccel) {

  4208.         if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)

  4209.             return -1;

  4210.         if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  4211.             return -1;

  4212.         if (avctx->hwaccel->end_frame(avctx) < 0)

  4213.             return -1;

  4214.     } else {

  4215.         ff_er_frame_start(s);

  4216. 

  4217.         v->bits = buf_size * 8;

  4218.         vc1_decode_blocks(v);

  4219. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4220. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4221. //      return -1;

  4222.         ff_er_frame_end(s);

  4223.     }

  4224. 

  4225.     MPV_frame_end(s);

  4226. 

  4227. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4228. assert(s->current_picture.pict_type == s->pict_type);

  4229.     if (s->pict_type == FF_B_TYPE || s->low_delay) {

  4230.         *pict= *(AVFrame*)s->current_picture_ptr;

  4231.     } else if (s->last_picture_ptr != NULL) {

  4232.         *pict= *(AVFrame*)s->last_picture_ptr;

  4233.     }

  4234. 

  4235.     if(s->last_picture_ptr || s->low_delay){

  4236.         *data_size = sizeof(AVFrame);

  4237.         ff_print_debug_info(s, pict);

  4238.     }

  4239. 

  4240.     av_free(buf2);

  4241.     return buf_size;

  4242. }

  4243. 

  4244. 

  4245. /** Close a VC1/WMV3 decoder

  4246.  * @warning Initial try at using MpegEncContext stuff

  4247.  */

  4248. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  4249. {

  4250.     VC1Context *v = avctx->priv_data;

  4251. 

  4252.     av_freep(&v->hrd_rate);

  4253.     av_freep(&v->hrd_buffer);

  4254.     MPV_common_end(&v->s);

  4255.     av_freep(&v->mv_type_mb_plane);

  4256.     av_freep(&v->direct_mb_plane);

  4257.     av_freep(&v->acpred_plane);

  4258.     av_freep(&v->over_flags_plane);

  4259.     av_freep(&v->mb_type_base);

  4260.     av_freep(&v->cbp_base);

  4261.     ff_intrax8_common_end(&v->x8);

  4262.     return 0;

  4263. }

  4264. 

  4265. 

  4266. AVCodec vc1_decoder = {

  4267.     "vc1",

  4268.     CODEC_TYPE_VIDEO,

  4269.     CODEC_ID_VC1,

  4270.     sizeof(VC1Context),

  4271.     vc1_decode_init,

  4272.     NULL,

  4273.     vc1_decode_end,

  4274.     vc1_decode_frame,

  4275.     CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  4276.     NULL,

  4277.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  4278.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4279. };

  4280. 

  4281. AVCodec wmv3_decoder = {

  4282.     "wmv3",

  4283.     CODEC_TYPE_VIDEO,

  4284.     CODEC_ID_WMV3,

  4285.     sizeof(VC1Context),

  4286.     vc1_decode_init,

  4287.     NULL,

  4288.     vc1_decode_end,

  4289.     vc1_decode_frame,

  4290.     CODEC_CAP_DR1 | CODEC_CAP_DELAY,

  4291.     NULL,

  4292.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  4293.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4294. };

  4295. 

  4296. #if CONFIG_WMV3_VDPAU_DECODER

  4297. AVCodec wmv3_vdpau_decoder = {

  4298.     "wmv3_vdpau",

  4299.     CODEC_TYPE_VIDEO,

  4300.     CODEC_ID_WMV3,

  4301.     sizeof(VC1Context),

  4302.     vc1_decode_init,

  4303.     NULL,

  4304.     vc1_decode_end,

  4305.     vc1_decode_frame,

  4306.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4307.     NULL,

  4308.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  4309.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_WMV3, PIX_FMT_NONE}

  4310. };

  4311. #endif

  4312. 

  4313. #if CONFIG_VC1_VDPAU_DECODER

  4314. AVCodec vc1_vdpau_decoder = {

  4315.     "vc1_vdpau",

  4316.     CODEC_TYPE_VIDEO,

  4317.     CODEC_ID_VC1,

  4318.     sizeof(VC1Context),

  4319.     vc1_decode_init,

  4320.     NULL,

  4321.     vc1_decode_end,

  4322.     vc1_decode_frame,

  4323.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4324.     NULL,

  4325.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  4326.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_VC1, PIX_FMT_NONE}

  4327. };

  4328. #endif