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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.  * @name 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.     }

  318. 

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

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

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

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

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

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

  325.     {

  326.         av_log(avctx, AV_LOG_ERROR,

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

  328.     }

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

  330.         v->s.loop_filter = 0;

  331. 

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

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

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

  335.     if (!v->res_fasttx)

  336.     {

  337.         v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct_8;

  338.         v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;

  339.         v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;

  340.         v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;

  341.         v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add_8;

  342.         v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;

  343.         v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;

  344.         v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;

  345.     }

  346. 

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

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

  349.     {

  350.         av_log(avctx, AV_LOG_ERROR,

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

  352.         return -1;

  353.     }

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

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

  356.     {

  357.         av_log(avctx, AV_LOG_ERROR,

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

  359.         return -1;

  360.     }

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

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

  363. 

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

  365.     if (v->res_transtab)

  366.     {

  367.         av_log(avctx, AV_LOG_ERROR,

  368.                "1 for reserved RES_TRANSTAB is forbidden\n");

  369.         return -1;

  370.     }

  371. 

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

  373. 

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

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

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

  377.     {

  378.         av_log(avctx, AV_LOG_INFO,

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

  380.     }

  381. 

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

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

  384. 

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

  386. 

  387.     if (v->res_sprite) {

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

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

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

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

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

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

  394.             return -1;

  395.         }

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

  397.         v->res_rtm_flag = 0;

  398.     } else {

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

  400.     }

  401.     if (!v->res_rtm_flag)

  402.     {

  403. //            av_log(avctx, AV_LOG_ERROR,

  404. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  405.         av_log(avctx, AV_LOG_ERROR,

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

  407.         //return -1;

  408.     }

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

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

  411.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  420.                );

  421.     return 0;

  422. }

  423. 

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

  425. {

  426.     v->res_rtm_flag = 1;

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

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

  429.     {

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

  431.     }

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

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

  434.     {

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

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

  437.         return -1;

  438.     }

  439. 

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

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

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

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

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

  445. 

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

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

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

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

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

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

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

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

  454.     skip_bits1(gb); // reserved

  455. 

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

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

  458. 

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

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

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

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

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

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

  465.                v->tfcntrflag, v->finterpflag

  466.                );

  467. 

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

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

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

  471.         return -1;

  472.     }

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

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

  475.         int w, h, ar = 0;

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

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

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

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

  480.         if(get_bits1(gb))

  481.             ar = get_bits(gb, 4);

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

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

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

  485.             w = get_bits(gb, 8) + 1;

  486.             h = get_bits(gb, 8) + 1;

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

  488.         }

  489.         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);

  490. 

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

  492.             if(get_bits1(gb)) {

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

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

  495.             } else {

  496.                 int nr, dr;

  497.                 nr = get_bits(gb, 8);

  498.                 dr = get_bits(gb, 4);

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

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

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

  502.                 }

  503.             }

  504.             if(v->broadcast) { // Pulldown may be present

  505.                 v->s.avctx->time_base.den *= 2;

  506.                 v->s.avctx->ticks_per_frame = 2;

  507.             }

  508.         }

  509. 

  510.         if(get_bits1(gb)){

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

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

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

  514.         }

  515.     }

  516. 

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

  518.     if(v->hrd_param_flag) {

  519.         int i;

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

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

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

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

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

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

  526.         }

  527.     }

  528.     return 0;

  529. }

  530. 

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

  532. {

  533.     int i;

  534. 

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

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

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

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

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

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

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

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

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

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

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

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

  547. 

  548.     if(v->hrd_param_flag){

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

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

  551.         }

  552.     }

  553. 

  554.     if(get_bits1(gb)){

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

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

  557.     }

  558.     if(v->extended_mv)

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

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

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

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

  563.     }

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

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

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

  567.     }

  568. 

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

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

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

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

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

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

  575. 

  576.     return 0;

  577. }

  578. 

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

  580. {

  581.     int pqindex, lowquant, status;

  582. 

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

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

  585.     v->rangeredfrm = 0;

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

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

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

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

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

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

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

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

  594. 

  595.     v->bi_type = 0;

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

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

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

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

  600.             v->s.pict_type = AV_PICTURE_TYPE_BI;

  601.         }

  602.     }

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

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

  605. 

  606.     if(v->parse_only)

  607.         return 0;

  608. 

  609.     /* calculate RND */

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

  611.         v->rnd = 1;

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

  613.         v->rnd ^= 1;

  614. 

  615.     /* Quantizer stuff */

  616.     pqindex = get_bits(gb, 5);

  617.     if(!pqindex) return -1;

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

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

  620.     else

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

  622. 

  623.     v->pquantizer = 1;

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

  625.         v->pquantizer = pqindex < 9;

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

  627.         v->pquantizer = 0;

  628.     v->pqindex = pqindex;

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

  630.     else v->halfpq = 0;

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

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

  633.     v->dquantfrm = 0;

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

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

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

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

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

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

  640. 

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

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

  643.     }else v->x8_type = 0;

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

  645. //        (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);

  646. 

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

  648. 

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

  650.     case AV_PICTURE_TYPE_P:

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

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

  653.         else v->tt_index = 2;

  654. 

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

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

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

  658.         {

  659.             int scale, shift, i;

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

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

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

  663.             v->use_ic = 1;

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

  665.             if(!v->lumscale) {

  666.                 scale = -64;

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

  668.                 if(v->lumshift > 31)

  669.                     shift += 128 << 6;

  670.             } else {

  671.                 scale = v->lumscale + 32;

  672.                 if(v->lumshift > 31)

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

  674.                 else

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

  676.             }

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

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

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

  680.             }

  681.         }

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

  683.             v->s.quarter_sample = 0;

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

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

  686.                 v->s.quarter_sample = 0;

  687.             else

  688.                 v->s.quarter_sample = 1;

  689.         } else

  690.             v->s.quarter_sample = 1;

  691.         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));

  692. 

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

  694.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

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

  696.         {

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

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

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

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

  701.         } else {

  702.             v->mv_type_is_raw = 0;

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

  704.         }

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

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

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

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

  709. 

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

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

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

  713. 

  714.         if (v->dquant)

  715.         {

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

  717.             vop_dquant_decoding(v);

  718.         }

  719. 

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

  721.         if (v->vstransform)

  722.         {

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

  724.             if (v->ttmbf)

  725.             {

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

  727.             }

  728.         } else {

  729.             v->ttmbf = 1;

  730.             v->ttfrm = TT_8X8;

  731.         }

  732.         break;

  733.     case AV_PICTURE_TYPE_B:

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

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

  736.         else v->tt_index = 2;

  737. 

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

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

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

  741. 

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

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

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

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

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

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

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

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

  750. 

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

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

  753. 

  754.         if (v->dquant)

  755.         {

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

  757.             vop_dquant_decoding(v);

  758.         }

  759. 

  760.         v->ttfrm = 0;

  761.         if (v->vstransform)

  762.         {

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

  764.             if (v->ttmbf)

  765.             {

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

  767.             }

  768.         } else {

  769.             v->ttmbf = 1;

  770.             v->ttfrm = TT_8X8;

  771.         }

  772.         break;

  773.     }

  774. 

  775.     if(!v->x8_type)

  776.     {

  777.         /* AC Syntax */

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

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

  780.         {

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

  782.         }

  783.         /* DC Syntax */

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

  785.     }

  786. 

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

  788.         v->s.pict_type = AV_PICTURE_TYPE_B;

  789.         v->bi_type = 1;

  790.     }

  791.     return 0;

  792. }

  793. 

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

  795. {

  796.     int pqindex, lowquant;

  797.     int status;

  798. 

  799.     v->p_frame_skipped = 0;

  800. 

  801.     if(v->interlace){

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

  803.         if(v->fcm){

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

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

  806.             return -1;

  807.         }

  808.     }

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

  810.     case 0:

  811.         v->s.pict_type = AV_PICTURE_TYPE_P;

  812.         break;

  813.     case 1:

  814.         v->s.pict_type = AV_PICTURE_TYPE_B;

  815.         break;

  816.     case 2:

  817.         v->s.pict_type = AV_PICTURE_TYPE_I;

  818.         break;

  819.     case 3:

  820.         v->s.pict_type = AV_PICTURE_TYPE_BI;

  821.         break;

  822.     case 4:

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

  824.         v->p_frame_skipped = 1;

  825.         break;

  826.     }

  827.     if(v->tfcntrflag)

  828.         skip_bits(gb, 8);

  829.     if(v->broadcast) {

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

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

  832.         } else {

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

  834.             v->rff = get_bits1(gb);

  835.         }

  836.     }

  837.     if(v->panscanflag) {

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

  839.         //...

  840.     }

  841.     if(v->p_frame_skipped) {

  842.         return 0;

  843.     }

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

  845.     if(v->interlace)

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

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

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

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

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

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

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

  853.         }

  854.     }

  855.     pqindex = get_bits(gb, 5);

  856.     if(!pqindex) return -1;

  857.     v->pqindex = pqindex;

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

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

  860.     else

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

  862. 

  863.     v->pquantizer = 1;

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

  865.         v->pquantizer = pqindex < 9;

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

  867.         v->pquantizer = 0;

  868.     v->pqindex = pqindex;

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

  870.     else v->halfpq = 0;

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

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

  873.     if(v->postprocflag)

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

  875. 

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

  877. 

  878.     if(v->parse_only)

  879.         return 0;

  880. 

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

  882.     case AV_PICTURE_TYPE_I:

  883.     case AV_PICTURE_TYPE_BI:

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

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

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

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

  888.         v->condover = CONDOVER_NONE;

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

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

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

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

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

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

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

  896.             }

  897.         }

  898.         break;

  899.     case AV_PICTURE_TYPE_P:

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

  901.         else v->mvrange = 0;

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

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

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

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

  906. 

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

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

  909.         else v->tt_index = 2;

  910. 

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

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

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

  914.         {

  915.             int scale, shift, i;

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

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

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

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

  920.             if(!v->lumscale) {

  921.                 scale = -64;

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

  923.                 if(v->lumshift > 31)

  924.                     shift += 128 << 6;

  925.             } else {

  926.                 scale = v->lumscale + 32;

  927.                 if(v->lumshift > 31)

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

  929.                 else

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

  931.             }

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

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

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

  935.             }

  936.             v->use_ic = 1;

  937.         }

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

  939.             v->s.quarter_sample = 0;

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

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

  942.                 v->s.quarter_sample = 0;

  943.             else

  944.                 v->s.quarter_sample = 1;

  945.         } else

  946.             v->s.quarter_sample = 1;

  947.         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));

  948. 

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

  950.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

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

  952.         {

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

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

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

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

  957.         } else {

  958.             v->mv_type_is_raw = 0;

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

  960.         }

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

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

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

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

  965. 

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

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

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

  969.         if (v->dquant)

  970.         {

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

  972.             vop_dquant_decoding(v);

  973.         }

  974. 

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

  976.         if (v->vstransform)

  977.         {

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

  979.             if (v->ttmbf)

  980.             {

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

  982.             }

  983.         } else {

  984.             v->ttmbf = 1;

  985.             v->ttfrm = TT_8X8;

  986.         }

  987.         break;

  988.     case AV_PICTURE_TYPE_B:

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

  990.         else v->mvrange = 0;

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

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

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

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

  995. 

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

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

  998.         else v->tt_index = 2;

  999. 

  1000.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1001.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1002.         v->s.mspel = v->s.quarter_sample;

  1003. 

  1004.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

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

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

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

  1008.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1009.         if (status < 0) return -1;

  1010.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1011.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1012. 

  1013.         v->s.mv_table_index = get_bits(gb, 2);

  1014.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1015. 

  1016.         if (v->dquant)

  1017.         {

  1018.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1019.             vop_dquant_decoding(v);

  1020.         }

  1021. 

  1022.         v->ttfrm = 0;

  1023.         if (v->vstransform)

  1024.         {

  1025.             v->ttmbf = get_bits1(gb);

  1026.             if (v->ttmbf)

  1027.             {

  1028.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1029.             }

  1030.         } else {

  1031.             v->ttmbf = 1;

  1032.             v->ttfrm = TT_8X8;

  1033.         }

  1034.         break;

  1035.     }

  1036. 

  1037.     /* AC Syntax */

  1038.     v->c_ac_table_index = decode012(gb);

  1039.     if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)

  1040.     {

  1041.         v->y_ac_table_index = decode012(gb);

  1042.     }

  1043.     /* DC Syntax */

  1044.     v->s.dc_table_index = get_bits1(gb);

  1045.     if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) && v->dquant) {

  1046.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1047.         vop_dquant_decoding(v);

  1048.     }

  1049. 

  1050.     v->bi_type = 0;

  1051.     if(v->s.pict_type == AV_PICTURE_TYPE_BI) {

  1052.         v->s.pict_type = AV_PICTURE_TYPE_B;

  1053.         v->bi_type = 1;

  1054.     }

  1055.     return 0;

  1056. }