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FFmpeg/libavcodec/vc1.c

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  1. /*

  2.  * VC-1 and WMV3 decoder common code

  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 Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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

  25.  * VC-1 and WMV3 decoder common code

  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 "msmpeg4data.h"

  35. #include "unary.h"

  36. #include "simple_idct.h"

  37. 

  38. #undef NDEBUG

  39. #include <assert.h>

  40. 

  41. /***********************************************************************/

  42. /**

  43.  * @defgroup vc1bitplane VC-1 Bitplane decoding

  44.  * @see 8.7, p56

  45.  * @{

  46.  */

  47. 

  48. /**

  49.  * Imode types

  50.  * @{

  51.  */

  52. enum Imode {

  53.     IMODE_RAW,

  54.     IMODE_NORM2,

  55.     IMODE_DIFF2,

  56.     IMODE_NORM6,

  57.     IMODE_DIFF6,

  58.     IMODE_ROWSKIP,

  59.     IMODE_COLSKIP

  60. };

  61. /** @} */ //imode defines

  62. 

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

  64.  * @param plane Buffer to store decoded bits

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

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

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

  68.  */

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

  70.     int x, y;

  71. 

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

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

  74.             memset(plane, 0, width);

  75.         else

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

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

  78.         plane += stride;

  79.     }

  80. }

  81. 

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

  83.  * @param plane Buffer to store decoded bits

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

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

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

  87.  * @todo FIXME: Optimize

  88.  */

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

  90.     int x, y;

  91. 

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

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

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

  95.                 plane[y*stride] = 0;

  96.         else

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

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

  99.         plane ++;

  100.     }

  101. }

  102. 

  103. /** Decode a bitplane's bits

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

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

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

  107.  * @return Status

  108.  * @todo FIXME: Optimize

  109.  */

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

  111. {

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

  113. 

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

  115.     uint8_t invert, *planep = data;

  116.     int width, height, stride;

  117. 

  118.     width = v->s.mb_width;

  119.     height = v->s.mb_height;

  120.     stride = v->s.mb_stride;

  121.     invert = get_bits1(gb);

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

  123. 

  124.     *raw_flag = 0;

  125.     switch (imode)

  126.     {

  127.     case IMODE_RAW:

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

  129.         *raw_flag = 1; //invert ignored

  130.         return invert;

  131.     case IMODE_DIFF2:

  132.     case IMODE_NORM2:

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

  134.         {

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

  136.             offset = 1;

  137.         }

  138.         else offset = 0;

  139.         // decode bitplane as one long line

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

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

  142.             *planep++ = code & 1;

  143.             offset++;

  144.             if(offset == width) {

  145.                 offset = 0;

  146.                 planep += stride - width;

  147.             }

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

  149.             offset++;

  150.             if(offset == width) {

  151.                 offset = 0;

  152.                 planep += stride - width;

  153.             }

  154.         }

  155.         break;

  156.     case IMODE_DIFF6:

  157.     case IMODE_NORM6:

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

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

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

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

  162.                     if(code < 0){

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

  164.                         return -1;

  165.                     }

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

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

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

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

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

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

  172.                 }

  173.                 planep += stride * 3;

  174.             }

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

  176.         } else { // 3x2

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

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

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

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

  181.                     if(code < 0){

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

  183.                         return -1;

  184.                     }

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

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

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

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

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

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

  191.                 }

  192.                 planep += stride * 2;

  193.             }

  194.             x = width % 3;

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

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

  197.         }

  198.         break;

  199.     case IMODE_ROWSKIP:

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

  201.         break;

  202.     case IMODE_COLSKIP:

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

  204.         break;

  205.     default: break;

  206.     }

  207. 

  208.     /* Applying diff operator */

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

  210.     {

  211.         planep = data;

  212.         planep[0] ^= invert;

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

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

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

  216.         {

  217.             planep += stride;

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

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

  220.             {

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

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

  223.             }

  224.         }

  225.     }

  226.     else if (invert)

  227.     {

  228.         planep = data;

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

  230.     }

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

  232. }

  233. 

  234. /** @} */ //Bitplane group

  235. 

  236. /***********************************************************************/

  237. /** VOP Dquant decoding

  238.  * @param v VC-1 Context

  239.  */

  240. static int vop_dquant_decoding(VC1Context *v)

  241. {

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

  243.     int pqdiff;

  244. 

  245.     //variable size

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

  247.     {

  248.         pqdiff = get_bits(gb, 3);

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

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

  251.     }

  252.     else

  253.     {

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

  255.         if ( v->dquantfrm )

  256.         {

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

  258.             switch (v->dqprofile)

  259.             {

  260.             case DQPROFILE_SINGLE_EDGE:

  261.             case DQPROFILE_DOUBLE_EDGES:

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

  263.                 break;

  264.             case DQPROFILE_ALL_MBS:

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

  266.                 if(!v->dqbilevel)

  267.                     v->halfpq = 0;

  268.             default: break; //Forbidden ?

  269.             }

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

  271.             {

  272.                 pqdiff = get_bits(gb, 3);

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

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

  275.             }

  276.         }

  277.     }

  278.     return 0;

  279. }

  280. 

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

  282. 

  283. /**

  284.  * Decode Simple/Main Profiles sequence header

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

  286.  * @param avctx Codec context

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

  288.  * @return Status

  289.  */

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

  291. {

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

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

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

  295.     {

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

  297.     }

  298. 

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

  300.     {

  301.         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;

  302.         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;

  303.         return decode_sequence_header_adv(v, gb);

  304.     }

  305.     else

  306.     {

  307.         v->zz_8x4 = wmv2_scantableA;

  308.         v->zz_4x8 = wmv2_scantableB;

  309.         v->res_y411   = get_bits1(gb);

  310.         v->res_sprite = get_bits1(gb);

  311.         if (v->res_y411)

  312.         {

  313.             av_log(avctx, AV_LOG_ERROR,

  314.                    "Old interlaced mode is not supported\n");

  315.             return -1;

  316.         }

  317.         if (v->res_sprite) {

  318.             av_log(avctx, AV_LOG_ERROR, "WMVP is not fully supported\n");

  319.         }

  320.     }

  321. 

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

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

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

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

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

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

  328.     {

  329.         av_log(avctx, AV_LOG_ERROR,

  330.                "LOOPFILTER shall not be enabled in Simple Profile\n");

  331.     }

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

  333.         v->s.loop_filter = 0;

  334. 

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

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

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

  338.     if (!v->res_fasttx)

  339.     {

  340.         v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct;

  341.         v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;

  342.         v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;

  343.         v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;

  344.         v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add;

  345.         v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;

  346.         v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;

  347.         v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;

  348.     }

  349. 

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

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

  352.     {

  353.         av_log(avctx, AV_LOG_ERROR,

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

  355.         return -1;

  356.     }

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

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

  359.     {

  360.         av_log(avctx, AV_LOG_ERROR,

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

  362.         return -1;

  363.     }

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

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

  366. 

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

  368.     if (v->res_transtab)

  369.     {

  370.         av_log(avctx, AV_LOG_ERROR,

  371.                "1 for reserved RES_TRANSTAB is forbidden\n");

  372.         return -1;

  373.     }

  374. 

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

  376. 

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

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

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

  380.     {

  381.         av_log(avctx, AV_LOG_INFO,

  382.                "RANGERED should be set to 0 in Simple Profile\n");

  383.     }

  384. 

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

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

  387. 

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

  389. 

  390.     if (v->res_sprite) {

  391.         v->s.avctx->width  = v->s.avctx->coded_width  = get_bits(gb, 11);

  392.         v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11);

  393.         skip_bits(gb, 5); //frame rate

  394.         v->res_x8 = get_bits1(gb);

  395.         if (get_bits1(gb)) { // something to do with DC VLC selection

  396.             av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n");

  397.             return -1;

  398.         }

  399.         skip_bits(gb, 3); //slice code

  400.         v->res_rtm_flag = 0;

  401.     } else {

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

  403.     }

  404.     if (!v->res_rtm_flag)

  405.     {

  406. //            av_log(avctx, AV_LOG_ERROR,

  407. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  408.         av_log(avctx, AV_LOG_ERROR,

  409.                "Old WMV3 version detected, some frames may be decoded incorrectly\n");

  410.         //return -1;

  411.     }

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

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

  414.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  423.                );

  424.     return 0;

  425. }

  426. 

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

  428. {

  429.     v->res_rtm_flag = 1;

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

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

  432.     {

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

  434.     }

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

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

  437.     {

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

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

  440.         return -1;

  441.     }

  442. 

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

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

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

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

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

  448. 

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

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

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

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

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

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

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

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

  457.     skip_bits1(gb); // reserved

  458. 

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

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

  461. 

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

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

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

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

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

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

  468.                v->tfcntrflag, v->finterpflag

  469.                );

  470. 

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

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

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

  474.         return -1;

  475.     }

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

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

  478.         int w, h, ar = 0;

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

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

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

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

  483.         if(get_bits1(gb))

  484.             ar = get_bits(gb, 4);

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

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

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

  488.             w = get_bits(gb, 8);

  489.             h = get_bits(gb, 8);

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

  491.         }

  492.         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);

  493. 

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

  495.             if(get_bits1(gb)) {

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

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

  498.             } else {

  499.                 int nr, dr;

  500.                 nr = get_bits(gb, 8);

  501.                 dr = get_bits(gb, 4);

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

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

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

  505.                 }

  506.             }

  507.         }

  508. 

  509.         if(get_bits1(gb)){

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

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

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

  513.         }

  514.     }

  515. 

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

  517.     if(v->hrd_param_flag) {

  518.         int i;

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

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

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

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

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

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

  525.         }

  526.     }

  527.     return 0;

  528. }

  529. 

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

  531. {

  532.     int i;

  533. 

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

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

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

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

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

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

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

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

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

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

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

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

  546. 

  547.     if(v->hrd_param_flag){

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

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

  550.         }

  551.     }

  552. 

  553.     if(get_bits1(gb)){

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

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

  556.     }

  557.     if(v->extended_mv)

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

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

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

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

  562.     }

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

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

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

  566.     }

  567. 

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

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

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

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

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

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

  574. 

  575.     return 0;

  576. }

  577. 

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

  579. {

  580.     int pqindex, lowquant, status;

  581. 

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

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

  584.     v->rangeredfrm = 0;

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

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

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

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

  589.             if (get_bits1(gb)) v->s.pict_type = AV_PICTURE_TYPE_I;

  590.             else v->s.pict_type = AV_PICTURE_TYPE_B;

  591.         } else v->s.pict_type = AV_PICTURE_TYPE_P;

  592.     } else v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;

  593. 

  594.     v->bi_type = 0;

  595.     if(v->s.pict_type == AV_PICTURE_TYPE_B) {

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

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

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

  599.             v->s.pict_type = AV_PICTURE_TYPE_BI;

  600.         }

  601.     }

  602.     if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)

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

  604. 

  605.     if(v->parse_only)

  606.         return 0;

  607. 

  608.     /* calculate RND */

  609.     if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)

  610.         v->rnd = 1;

  611.     if(v->s.pict_type == AV_PICTURE_TYPE_P)

  612.         v->rnd ^= 1;

  613. 

  614.     /* Quantizer stuff */

  615.     pqindex = get_bits(gb, 5);

  616.     if(!pqindex) return -1;

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

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

  619.     else

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

  621. 

  622.     v->pquantizer = 1;

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

  624.         v->pquantizer = pqindex < 9;

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

  626.         v->pquantizer = 0;

  627.     v->pqindex = pqindex;

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

  629.     else v->halfpq = 0;

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

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

  632.     v->dquantfrm = 0;

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

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

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

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

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

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

  639. 

  640.     if(v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)){

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

  642.     }else v->x8_type = 0;

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

  644. //        (v->s.pict_type == AV_PICTURE_TYPE_P) ? 'P' : ((v->s.pict_type == AV_PICTURE_TYPE_I) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  645. 

  646.     if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0;

  647. 

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

  649.     case AV_PICTURE_TYPE_P:

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

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

  652.         else v->tt_index = 2;

  653. 

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

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

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

  657.         {

  658.             int scale, shift, i;

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

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

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

  662.             v->use_ic = 1;

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

  664.             if(!v->lumscale) {

  665.                 scale = -64;

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

  667.                 if(v->lumshift > 31)

  668.                     shift += 128 << 6;

  669.             } else {

  670.                 scale = v->lumscale + 32;

  671.                 if(v->lumshift > 31)

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

  673.                 else

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

  675.             }

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

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

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

  679.             }

  680.         }

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

  682.             v->s.quarter_sample = 0;

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

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

  685.                 v->s.quarter_sample = 0;

  686.             else

  687.                 v->s.quarter_sample = 1;

  688.         } else

  689.             v->s.quarter_sample = 1;

  690.         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));

  691. 

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

  693.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

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

  695.         {

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

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

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

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

  700.         } else {

  701.             v->mv_type_is_raw = 0;

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

  703.         }

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

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

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

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

  708. 

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

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

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

  712. 

  713.         if (v->dquant)

  714.         {

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

  716.             vop_dquant_decoding(v);

  717.         }

  718. 

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

  720.         if (v->vstransform)

  721.         {

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

  723.             if (v->ttmbf)

  724.             {

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

  726.             }

  727.         } else {

  728.             v->ttmbf = 1;

  729.             v->ttfrm = TT_8X8;

  730.         }

  731.         break;

  732.     case AV_PICTURE_TYPE_B:

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

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

  735.         else v->tt_index = 2;

  736. 

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

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

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

  740. 

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

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

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

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

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

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

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

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

  749. 

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

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

  752. 

  753.         if (v->dquant)

  754.         {

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

  756.             vop_dquant_decoding(v);

  757.         }

  758. 

  759.         v->ttfrm = 0;

  760.         if (v->vstransform)

  761.         {

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

  763.             if (v->ttmbf)

  764.             {

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

  766.             }

  767.         } else {

  768.             v->ttmbf = 1;

  769.             v->ttfrm = TT_8X8;

  770.         }

  771.         break;

  772.     }

  773. 

  774.     if(!v->x8_type)

  775.     {

  776.         /* AC Syntax */

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

  778.         if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)

  779.         {

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

  781.         }

  782.         /* DC Syntax */

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

  784.     }

  785. 

  786.     if(v->s.pict_type == AV_PICTURE_TYPE_BI) {

  787.         v->s.pict_type = AV_PICTURE_TYPE_B;

  788.         v->bi_type = 1;

  789.     }

  790.     return 0;

  791. }

  792. 

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

  794. {

  795.     int pqindex, lowquant;

  796.     int status;

  797. 

  798.     v->p_frame_skipped = 0;

  799. 

  800.     if(v->interlace){

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

  802.         if(v->fcm){

  803.             if(!v->warn_interlaced++)

  804.                 av_log(v->s.avctx, AV_LOG_ERROR, "Interlaced frames/fields support is not implemented\n");

  805.             return -1;

  806.         }

  807.     }

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

  809.     case 0:

  810.         v->s.pict_type = AV_PICTURE_TYPE_P;

  811.         break;

  812.     case 1:

  813.         v->s.pict_type = AV_PICTURE_TYPE_B;

  814.         break;

  815.     case 2:

  816.         v->s.pict_type = AV_PICTURE_TYPE_I;

  817.         break;

  818.     case 3:

  819.         v->s.pict_type = AV_PICTURE_TYPE_BI;

  820.         break;

  821.     case 4:

  822.         v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic

  823.         v->p_frame_skipped = 1;

  824.         return 0;

  825.     }

  826.     if(v->tfcntrflag)

  827.         skip_bits(gb, 8);

  828.     if(v->broadcast) {

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

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

  831.         } else {

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

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

  834.         }

  835.     }

  836.     if(v->panscanflag) {

  837.         av_log_missing_feature(v->s.avctx, "Pan-scan", 0);

  838.         //...

  839.     }

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

  841.     if(v->interlace)

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

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

  844.     if(v->s.pict_type == AV_PICTURE_TYPE_B) {

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

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

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

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

  849.         }

  850.     }

  851.     pqindex = get_bits(gb, 5);

  852.     if(!pqindex) return -1;

  853.     v->pqindex = pqindex;

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

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

  856.     else

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

  858. 

  859.     v->pquantizer = 1;

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

  861.         v->pquantizer = pqindex < 9;

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

  863.         v->pquantizer = 0;

  864.     v->pqindex = pqindex;

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

  866.     else v->halfpq = 0;

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

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

  869.     if(v->postprocflag)

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

  871. 

  872.     if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0;

  873. 

  874.     if(v->parse_only)

  875.         return 0;

  876. 

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

  878.     case AV_PICTURE_TYPE_I:

  879.     case AV_PICTURE_TYPE_BI:

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

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

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

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

  884.         v->condover = CONDOVER_NONE;

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

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

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

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

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

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

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

  892.             }

  893.         }

  894.         break;

  895.     case AV_PICTURE_TYPE_P:

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

  897.         else v->mvrange = 0;

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

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

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

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

  902. 

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

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

  905.         else v->tt_index = 2;

  906. 

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

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

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

  910.         {

  911.             int scale, shift, i;

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

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

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

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

  916.             if(!v->lumscale) {

  917.                 scale = -64;

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

  919.                 if(v->lumshift > 31)

  920.                     shift += 128 << 6;

  921.             } else {

  922.                 scale = v->lumscale + 32;

  923.                 if(v->lumshift > 31)

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

  925.                 else

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

  927.             }

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

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

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

  931.             }

  932.             v->use_ic = 1;

  933.         }

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

  935.             v->s.quarter_sample = 0;

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

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

  938.                 v->s.quarter_sample = 0;

  939.             else

  940.                 v->s.quarter_sample = 1;

  941.         } else

  942.             v->s.quarter_sample = 1;

  943.         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));

  944. 

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

  946.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

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

  948.         {

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

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

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

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

  953.         } else {

  954.             v->mv_type_is_raw = 0;

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

  956.         }

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

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

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

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

  961. 

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

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

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

  965.         if (v->dquant)

  966.         {

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

  968.             vop_dquant_decoding(v);

  969.         }

  970. 

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

  972.         if (v->vstransform)

  973.         {

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

  975.             if (v->ttmbf)

  976.             {

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

  978.             }

  979.         } else {

  980.             v->ttmbf = 1;

  981.             v->ttfrm = TT_8X8;

  982.         }

  983.         break;

  984.     case AV_PICTURE_TYPE_B:

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

  986.         else v->mvrange = 0;

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

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

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

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

  991. 

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

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

  994.         else v->tt_index = 2;

  995. 

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

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

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

  999. 

  1000.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1001.         if (status < 0) return -1;

  1002.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1003.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1004.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1005.         if (status < 0) return -1;

  1006.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1007.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1008. 

  1009.         v->s.mv_table_index = get_bits(gb, 2);

  1010.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1011. 

  1012.         if (v->dquant)

  1013.         {

  1014.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1015.             vop_dquant_decoding(v);

  1016.         }

  1017. 

  1018.         v->ttfrm = 0;

  1019.         if (v->vstransform)

  1020.         {

  1021.             v->ttmbf = get_bits1(gb);

  1022.             if (v->ttmbf)

  1023.             {

  1024.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1025.             }

  1026.         } else {

  1027.             v->ttmbf = 1;

  1028.             v->ttfrm = TT_8X8;

  1029.         }

  1030.         break;

  1031.     }

  1032. 

  1033.     /* AC Syntax */

  1034.     v->c_ac_table_index = decode012(gb);

  1035.     if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)

  1036.     {

  1037.         v->y_ac_table_index = decode012(gb);

  1038.     }

  1039.     /* DC Syntax */

  1040.     v->s.dc_table_index = get_bits1(gb);

  1041.     if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) && v->dquant) {

  1042.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1043.         vop_dquant_decoding(v);

  1044.     }

  1045. 

  1046.     v->bi_type = 0;

  1047.     if(v->s.pict_type == AV_PICTURE_TYPE_BI) {

  1048.         v->s.pict_type = AV_PICTURE_TYPE_B;

  1049.         v->bi_type = 1;

  1050.     }

  1051.     return 0;

  1052. }