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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. /**

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

  52.  * @param v The VC1Context to initialize

  53.  * @return Status

  54.  */

  55. static int vc1_init_common(VC1Context *v)

  56. {

  57.     static int done = 0;

  58.     int i = 0;

  59. 

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

  61. 

  62.     /* VLC tables */

  63.     if(!done)

  64.     {

  65.         init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  66.                  ff_vc1_bfraction_bits, 1, 1,

  67.                  ff_vc1_bfraction_codes, 1, 1, INIT_VLC_USE_STATIC);

  68.         init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  69.                  ff_vc1_norm2_bits, 1, 1,

  70.                  ff_vc1_norm2_codes, 1, 1, INIT_VLC_USE_STATIC);

  71.         init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  72.                  ff_vc1_norm6_bits, 1, 1,

  73.                  ff_vc1_norm6_codes, 2, 2, INIT_VLC_USE_STATIC);

  74.         init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  75.                  ff_vc1_imode_bits, 1, 1,

  76.                  ff_vc1_imode_codes, 1, 1, INIT_VLC_USE_STATIC);

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

  78.         {

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

  80.                      ff_vc1_ttmb_bits[i], 1, 1,

  81.                      ff_vc1_ttmb_codes[i], 2, 2, INIT_VLC_USE_STATIC);

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

  83.                      ff_vc1_ttblk_bits[i], 1, 1,

  84.                      ff_vc1_ttblk_codes[i], 1, 1, INIT_VLC_USE_STATIC);

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

  86.                      ff_vc1_subblkpat_bits[i], 1, 1,

  87.                      ff_vc1_subblkpat_codes[i], 1, 1, INIT_VLC_USE_STATIC);

  88.         }

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

  90.         {

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

  92.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

  93.                      ff_vc1_4mv_block_pattern_codes[i], 1, 1, INIT_VLC_USE_STATIC);

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

  95.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

  96.                      ff_vc1_cbpcy_p_codes[i], 2, 2, INIT_VLC_USE_STATIC);

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

  98.                      ff_vc1_mv_diff_bits[i], 1, 1,

  99.                      ff_vc1_mv_diff_codes[i], 2, 2, INIT_VLC_USE_STATIC);

  100.         }

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

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

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

  104.                      &vc1_ac_tables[i][0][0], 8, 4, INIT_VLC_USE_STATIC);

  105.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

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

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

  108.         done = 1;

  109.     }

  110. 

  111.     /* Other defaults */

  112.     v->pq = -1;

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

  114. 

  115.     return 0;

  116. }

  117. 

  118. /***********************************************************************/

  119. /**

  120.  * @defgroup vc1bitplane VC-1 Bitplane decoding

  121.  * @see 8.7, p56

  122.  * @{

  123.  */

  124. 

  125. /**

  126.  * Imode types

  127.  * @{

  128.  */

  129. enum Imode {

  130.     IMODE_RAW,

  131.     IMODE_NORM2,

  132.     IMODE_DIFF2,

  133.     IMODE_NORM6,

  134.     IMODE_DIFF6,

  135.     IMODE_ROWSKIP,

  136.     IMODE_COLSKIP

  137. };

  138. /** @} */ //imode defines

  139. 

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

  141.  * @param plane Buffer to store decoded bits

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

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

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

  145.  */

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

  147.     int x, y;

  148. 

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

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

  151.             memset(plane, 0, width);

  152.         else

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

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

  155.         plane += stride;

  156.     }

  157. }

  158. 

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

  160.  * @param plane Buffer to store decoded bits

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

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

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

  164.  * @todo FIXME: Optimize

  165.  */

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

  167.     int x, y;

  168. 

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

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

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

  172.                 plane[y*stride] = 0;

  173.         else

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

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

  176.         plane ++;

  177.     }

  178. }

  179. 

  180. /** Decode a bitplane's bits

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

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

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

  184.  * @return Status

  185.  * @todo FIXME: Optimize

  186.  */

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

  188. {

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

  190. 

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

  192.     uint8_t invert, *planep = data;

  193.     int width, height, stride;

  194. 

  195.     width = v->s.mb_width;

  196.     height = v->s.mb_height;

  197.     stride = v->s.mb_stride;

  198.     invert = get_bits1(gb);

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

  200. 

  201.     *raw_flag = 0;

  202.     switch (imode)

  203.     {

  204.     case IMODE_RAW:

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

  206.         *raw_flag = 1; //invert ignored

  207.         return invert;

  208.     case IMODE_DIFF2:

  209.     case IMODE_NORM2:

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

  211.         {

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

  213.             offset = 1;

  214.         }

  215.         else offset = 0;

  216.         // decode bitplane as one long line

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

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

  219.             *planep++ = code & 1;

  220.             offset++;

  221.             if(offset == width) {

  222.                 offset = 0;

  223.                 planep += stride - width;

  224.             }

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

  226.             offset++;

  227.             if(offset == width) {

  228.                 offset = 0;

  229.                 planep += stride - width;

  230.             }

  231.         }

  232.         break;

  233.     case IMODE_DIFF6:

  234.     case IMODE_NORM6:

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

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

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

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

  239.                     if(code < 0){

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

  241.                         return -1;

  242.                     }

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

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

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

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

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

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

  249.                 }

  250.                 planep += stride * 3;

  251.             }

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

  253.         } else { // 3x2

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

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

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

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

  258.                     if(code < 0){

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

  260.                         return -1;

  261.                     }

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

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

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

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

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

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

  268.                 }

  269.                 planep += stride * 2;

  270.             }

  271.             x = width % 3;

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

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

  274.         }

  275.         break;

  276.     case IMODE_ROWSKIP:

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

  278.         break;

  279.     case IMODE_COLSKIP:

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

  281.         break;

  282.     default: break;

  283.     }

  284. 

  285.     /* Applying diff operator */

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

  287.     {

  288.         planep = data;

  289.         planep[0] ^= invert;

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

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

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

  293.         {

  294.             planep += stride;

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

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

  297.             {

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

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

  300.             }

  301.         }

  302.     }

  303.     else if (invert)

  304.     {

  305.         planep = data;

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

  307.     }

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

  309. }

  310. 

  311. /** @} */ //Bitplane group

  312. 

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

  314. {

  315.     int i, j;

  316.     if(!s->first_slice_line)

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

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

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

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

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

  322.         if(!s->first_slice_line)

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

  324.         if(s->mb_x)

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

  326.     }

  327. }

  328. 

  329. /***********************************************************************/

  330. /** VOP Dquant decoding

  331.  * @param v VC-1 Context

  332.  */

  333. static int vop_dquant_decoding(VC1Context *v)

  334. {

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

  336.     int pqdiff;

  337. 

  338.     //variable size

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

  340.     {

  341.         pqdiff = get_bits(gb, 3);

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

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

  344.     }

  345.     else

  346.     {

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

  348.         if ( v->dquantfrm )

  349.         {

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

  351.             switch (v->dqprofile)

  352.             {

  353.             case DQPROFILE_SINGLE_EDGE:

  354.             case DQPROFILE_DOUBLE_EDGES:

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

  356.                 break;

  357.             case DQPROFILE_ALL_MBS:

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

  359.                 if(!v->dqbilevel)

  360.                     v->halfpq = 0;

  361.             default: break; //Forbidden ?

  362.             }

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

  364.             {

  365.                 pqdiff = get_bits(gb, 3);

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

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

  368.             }

  369.         }

  370.     }

  371.     return 0;

  372. }

  373. 

  374. /** Put block onto picture

  375.  */

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

  377. {

  378.     uint8_t *Y;

  379.     int ys, us, vs;

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

  381. 

  382.     if(v->rangeredfrm) {

  383.         int i, j, k;

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

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

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

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

  388. 

  389.     }

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

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

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

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

  394. 

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

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

  397.     Y += ys * 8;

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

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

  400. 

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

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

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

  404.     }

  405. }

  406. 

  407. /** Do motion compensation over 1 macroblock

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

  409.  */

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

  411. {

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

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

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

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

  416. 

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

  418. 

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

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

  421. 

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

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

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

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

  426.     }

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

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

  429.     if(v->fastuvmc) {

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

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

  432.     }

  433.     if(!dir) {

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

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

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

  437.     } else {

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

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

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

  441.     }

  442. 

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

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

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

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

  447. 

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

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

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

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

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

  453.     }else{

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

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

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

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

  458.     }

  459. 

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

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

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

  463. 

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

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

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

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

  468.     }

  469. 

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

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

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

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

  474. 

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

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

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

  478.         srcY = s->edge_emu_buffer;

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

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

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

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

  483.         srcU = uvbuf;

  484.         srcV = uvbuf + 16;

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

  486.         if(v->rangeredfrm) {

  487.             int i, j;

  488.             uint8_t *src, *src2;

  489. 

  490.             src = srcY;

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

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

  493.                 src += s->linesize;

  494.             }

  495.             src = srcU; src2 = srcV;

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

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

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

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

  500.                 }

  501.                 src += s->uvlinesize;

  502.                 src2 += s->uvlinesize;

  503.             }

  504.         }

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

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

  507.             int i, j;

  508.             uint8_t *src, *src2;

  509. 

  510.             src = srcY;

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

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

  513.                 src += s->linesize;

  514.             }

  515.             src = srcU; src2 = srcV;

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

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

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

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

  520.                 }

  521.                 src += s->uvlinesize;

  522.                 src2 += s->uvlinesize;

  523.             }

  524.         }

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

  526.     }

  527. 

  528.     if(s->mspel) {

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

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

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

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

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

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

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

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

  537. 

  538.         if(!v->rnd)

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

  540.         else

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

  542.     }

  543. 

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

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

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

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

  548.     if(!v->rnd){

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

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

  551.     }else{

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

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

  554.     }

  555. }

  556. 

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

  558.  */

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

  560. {

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

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

  563.     uint8_t *srcY;

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

  565.     int off;

  566. 

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

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

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

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

  571. 

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

  573. 

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

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

  576. 

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

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

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

  580.     }else{

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

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

  583.     }

  584. 

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

  586. 

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

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

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

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

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

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

  593.         srcY = s->edge_emu_buffer;

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

  595.         if(v->rangeredfrm) {

  596.             int i, j;

  597.             uint8_t *src;

  598. 

  599.             src = srcY;

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

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

  602.                 src += s->linesize;

  603.             }

  604.         }

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

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

  607.             int i, j;

  608.             uint8_t *src;

  609. 

  610.             src = srcY;

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

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

  613.                 src += s->linesize;

  614.             }

  615.         }

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

  617.     }

  618. 

  619.     if(s->mspel) {

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

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

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

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

  624.         if(!v->rnd)

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

  626.         else

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

  628.     }

  629. }

  630. 

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

  632. {

  633.     if(a < b) {

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

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

  636.     } else {

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

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

  639.     }

  640. }

  641. 

  642. 

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

  644.  */

  645. static void vc1_mc_4mv_chroma(VC1Context *v)

  646. {

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

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

  649.     uint8_t *srcU, *srcV;

  650.     int uvmx, uvmy, uvsrc_x, uvsrc_y;

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

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

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

  654. 

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

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

  657. 

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

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

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

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

  662.     }

  663. 

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

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

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

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

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

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

  670.         switch(idx) {

  671.         case 0x1:

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

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

  674.             break;

  675.         case 0x2:

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

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

  678.             break;

  679.         case 0x4:

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

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

  682.             break;

  683.         case 0x8:

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

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

  686.             break;

  687.         }

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

  689.         int t1 = 0, t2 = 0;

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

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

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

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

  694.     } else {

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

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

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

  698.     }

  699. 

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

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

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

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

  704.     if(v->fastuvmc) {

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

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

  707.     }

  708. 

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

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

  711. 

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

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

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

  715.     }else{

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

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

  718.     }

  719. 

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

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

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

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

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

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

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

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

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

  729.         srcU = s->edge_emu_buffer;

  730.         srcV = s->edge_emu_buffer + 16;

  731. 

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

  733.         if(v->rangeredfrm) {

  734.             int i, j;

  735.             uint8_t *src, *src2;

  736. 

  737.             src = srcU; src2 = srcV;

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

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

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

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

  742.                 }

  743.                 src += s->uvlinesize;

  744.                 src2 += s->uvlinesize;

  745.             }

  746.         }

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

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

  749.             int i, j;

  750.             uint8_t *src, *src2;

  751. 

  752.             src = srcU; src2 = srcV;

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

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

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

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

  757.                 }

  758.                 src += s->uvlinesize;

  759.                 src2 += s->uvlinesize;

  760.             }

  761.         }

  762.     }

  763. 

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

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

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

  767.     if(!v->rnd){

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

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

  770.     }else{

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

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

  773.     }

  774. }

  775. 

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

  777. 

  778. /**

  779.  * Decode Simple/Main Profiles sequence header

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

  781.  * @param avctx Codec context

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

  783.  * @return Status

  784.  */

  785. static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)

  786. {

  787.     VC1Context *v = avctx->priv_data;

  788. 

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

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

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

  792.     {

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

  794.     }

  795. 

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

  797.     {

  798.         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;

  799.         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;

  800.         return decode_sequence_header_adv(v, gb);

  801.     }

  802.     else

  803.     {

  804.         v->zz_8x4 = wmv2_scantableA;

  805.         v->zz_4x8 = wmv2_scantableB;

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

  807.         if (v->res_sm)

  808.         {

  809.             av_log(avctx, AV_LOG_ERROR,

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

  811.             return -1;

  812.         }

  813.     }

  814. 

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

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

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

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

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

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

  821.     {

  822.         av_log(avctx, AV_LOG_ERROR,

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

  824.     }

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

  826.         v->s.loop_filter = 0;

  827. 

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

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

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

  831.     if (!v->res_fasttx)

  832.     {

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

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

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

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

  837.     }

  838. 

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

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

  841.     {

  842.         av_log(avctx, AV_LOG_ERROR,

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

  844.         return -1;

  845.     }

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

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

  848.     {

  849.         av_log(avctx, AV_LOG_ERROR,

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

  851.         return -1;

  852.     }

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

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

  855. 

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

  857.     if (v->res_transtab)

  858.     {

  859.         av_log(avctx, AV_LOG_ERROR,

  860.                "1 for reserved RES_TRANSTAB is forbidden\n");

  861.         return -1;

  862.     }

  863. 

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

  865. 

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

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

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

  869.     {

  870.         av_log(avctx, AV_LOG_INFO,

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

  872.     }

  873. 

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

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

  876. 

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

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

  879.     if (!v->res_rtm_flag)

  880.     {

  881. //            av_log(avctx, AV_LOG_ERROR,

  882. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  883.         av_log(avctx, AV_LOG_ERROR,

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

  885.         //return -1;

  886.     }

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

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

  889.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  898.                );

  899.     return 0;

  900. }

  901. 

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

  903. {

  904.     v->res_rtm_flag = 1;

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

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

  907.     {

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

  909.     }

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

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

  912.     {

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

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

  915.         return -1;

  916.     }

  917. 

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

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

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

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

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

  923. 

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

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

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

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

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

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

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

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

  932.     skip_bits1(gb); // reserved

  933. 

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

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

  936. 

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

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

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

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

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

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

  943.                v->tfcntrflag, v->finterpflag

  944.                );

  945. 

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

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

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

  949.         return -1;

  950.     }

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

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

  953.         int w, h, ar = 0;

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

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

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

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

  958.         if(get_bits1(gb))

  959.             ar = get_bits(gb, 4);

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

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

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

  963.             w = get_bits(gb, 8);

  964.             h = get_bits(gb, 8);

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

  966.         }

  967.         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);

  968. 

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

  970.             if(get_bits1(gb)) {

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

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

  973.             } else {

  974.                 int nr, dr;

  975.                 nr = get_bits(gb, 8);

  976.                 dr = get_bits(gb, 4);

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

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

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

  980.                 }

  981.             }

  982.         }

  983. 

  984.         if(get_bits1(gb)){

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

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

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

  988.         }

  989.     }

  990. 

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

  992.     if(v->hrd_param_flag) {

  993.         int i;

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

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

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

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

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

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

  1000.         }

  1001.     }

  1002.     return 0;

  1003. }

  1004. 

  1005. static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)

  1006. {

  1007.     VC1Context *v = avctx->priv_data;

  1008.     int i;

  1009. 

  1010.     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));

  1011.     v->broken_link = get_bits1(gb);

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

  1013.     v->panscanflag = get_bits1(gb);

  1014.     v->refdist_flag = get_bits1(gb);

  1015.     v->s.loop_filter = get_bits1(gb);

  1016.     v->fastuvmc = get_bits1(gb);

  1017.     v->extended_mv = get_bits1(gb);

  1018.     v->dquant = get_bits(gb, 2);

  1019.     v->vstransform = get_bits1(gb);

  1020.     v->overlap = get_bits1(gb);

  1021.     v->quantizer_mode = get_bits(gb, 2);

  1022. 

  1023.     if(v->hrd_param_flag){

  1024.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1025.             skip_bits(gb, 8); //hrd_full[n]

  1026.         }

  1027.     }

  1028. 

  1029.     if(get_bits1(gb)){

  1030.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1031.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1032.     }

  1033.     if(v->extended_mv)

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

  1035.     if((v->range_mapy_flag = get_bits1(gb))) {

  1036.         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");

  1037.         v->range_mapy = get_bits(gb, 3);

  1038.     }

  1039.     if((v->range_mapuv_flag = get_bits1(gb))) {

  1040.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1041.         v->range_mapuv = get_bits(gb, 3);

  1042.     }

  1043. 

  1044.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1045.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1046.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1047.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1048.         v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,

  1049.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1050. 

  1051.     return 0;

  1052. }

  1053. 

  1054. static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1055. {

  1056.     int pqindex, lowquant, status;

  1057. 

  1058.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1059.     skip_bits(gb, 2); //framecnt unused

  1060.     v->rangeredfrm = 0;

  1061.     if (v->rangered) v->rangeredfrm = get_bits1(gb);

  1062.     v->s.pict_type = get_bits1(gb);

  1063.     if (v->s.avctx->max_b_frames) {

  1064.         if (!v->s.pict_type) {

  1065.             if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;

  1066.             else v->s.pict_type = FF_B_TYPE;

  1067.         } else v->s.pict_type = FF_P_TYPE;

  1068.     } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;

  1069. 

  1070.     v->bi_type = 0;

  1071.     if(v->s.pict_type == FF_B_TYPE) {

  1072.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1073.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1074.         if(v->bfraction == 0) {

  1075.             v->s.pict_type = FF_BI_TYPE;

  1076.         }

  1077.     }

  1078.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1079.         skip_bits(gb, 7); // skip buffer fullness

  1080. 

  1081.     /* calculate RND */

  1082.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1083.         v->rnd = 1;

  1084.     if(v->s.pict_type == FF_P_TYPE)

  1085.         v->rnd ^= 1;

  1086. 

  1087.     /* Quantizer stuff */

  1088.     pqindex = get_bits(gb, 5);

  1089.     if(!pqindex) return -1;

  1090.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1091.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1092.     else

  1093.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1094. 

  1095.     v->pquantizer = 1;

  1096.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1097.         v->pquantizer = pqindex < 9;

  1098.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1099.         v->pquantizer = 0;

  1100.     v->pqindex = pqindex;

  1101.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1102.     else v->halfpq = 0;

  1103.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1104.         v->pquantizer = get_bits1(gb);

  1105.     v->dquantfrm = 0;

  1106.     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);

  1107.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1108.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1109.     v->range_x = 1 << (v->k_x - 1);

  1110.     v->range_y = 1 << (v->k_y - 1);

  1111.     if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);

  1112. 

  1113.     if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){

  1114.         v->x8_type = get_bits1(gb);

  1115.     }else v->x8_type = 0;

  1116. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1117. //        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1118. 

  1119.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1120. 

  1121.     switch(v->s.pict_type) {

  1122.     case FF_P_TYPE:

  1123.         if (v->pq < 5) v->tt_index = 0;

  1124.         else if(v->pq < 13) v->tt_index = 1;

  1125.         else v->tt_index = 2;

  1126. 

  1127.         lowquant = (v->pq > 12) ? 0 : 1;

  1128.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1129.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1130.         {

  1131.             int scale, shift, i;

  1132.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1133.             v->lumscale = get_bits(gb, 6);

  1134.             v->lumshift = get_bits(gb, 6);

  1135.             v->use_ic = 1;

  1136.             /* fill lookup tables for intensity compensation */

  1137.             if(!v->lumscale) {

  1138.                 scale = -64;

  1139.                 shift = (255 - v->lumshift * 2) << 6;

  1140.                 if(v->lumshift > 31)

  1141.                     shift += 128 << 6;

  1142.             } else {

  1143.                 scale = v->lumscale + 32;

  1144.                 if(v->lumshift > 31)

  1145.                     shift = (v->lumshift - 64) << 6;

  1146.                 else

  1147.                     shift = v->lumshift << 6;

  1148.             }

  1149.             for(i = 0; i < 256; i++) {

  1150.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1151.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1152.             }

  1153.         }

  1154.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1155.             v->s.quarter_sample = 0;

  1156.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1157.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1158.                 v->s.quarter_sample = 0;

  1159.             else

  1160.                 v->s.quarter_sample = 1;

  1161.         } else

  1162.             v->s.quarter_sample = 1;

  1163.         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));

  1164. 

  1165.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1166.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1167.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1168.         {

  1169.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1170.             if (status < 0) return -1;

  1171.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1172.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1173.         } else {

  1174.             v->mv_type_is_raw = 0;

  1175.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1176.         }

  1177.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1178.         if (status < 0) return -1;

  1179.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1180.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1181. 

  1182.         /* Hopefully this is correct for P frames */

  1183.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1184.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1185. 

  1186.         if (v->dquant)

  1187.         {

  1188.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1189.             vop_dquant_decoding(v);

  1190.         }

  1191. 

  1192.         v->ttfrm = 0; //FIXME Is that so ?

  1193.         if (v->vstransform)

  1194.         {

  1195.             v->ttmbf = get_bits1(gb);

  1196.             if (v->ttmbf)

  1197.             {

  1198.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1199.             }

  1200.         } else {

  1201.             v->ttmbf = 1;

  1202.             v->ttfrm = TT_8X8;

  1203.         }

  1204.         break;

  1205.     case FF_B_TYPE:

  1206.         if (v->pq < 5) v->tt_index = 0;

  1207.         else if(v->pq < 13) v->tt_index = 1;

  1208.         else v->tt_index = 2;

  1209. 

  1210.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1211.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1212.         v->s.mspel = v->s.quarter_sample;

  1213. 

  1214.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1215.         if (status < 0) return -1;

  1216.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1217.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1218.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1219.         if (status < 0) return -1;

  1220.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1221.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1222. 

  1223.         v->s.mv_table_index = get_bits(gb, 2);

  1224.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1225. 

  1226.         if (v->dquant)

  1227.         {

  1228.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1229.             vop_dquant_decoding(v);

  1230.         }

  1231. 

  1232.         v->ttfrm = 0;

  1233.         if (v->vstransform)

  1234.         {

  1235.             v->ttmbf = get_bits1(gb);

  1236.             if (v->ttmbf)

  1237.             {

  1238.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1239.             }

  1240.         } else {

  1241.             v->ttmbf = 1;

  1242.             v->ttfrm = TT_8X8;

  1243.         }

  1244.         break;

  1245.     }

  1246. 

  1247.     if(!v->x8_type)

  1248.     {

  1249.         /* AC Syntax */

  1250.         v->c_ac_table_index = decode012(gb);

  1251.         if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1252.         {

  1253.             v->y_ac_table_index = decode012(gb);

  1254.         }

  1255.         /* DC Syntax */

  1256.         v->s.dc_table_index = get_bits1(gb);

  1257.     }

  1258. 

  1259.     if(v->s.pict_type == FF_BI_TYPE) {

  1260.         v->s.pict_type = FF_B_TYPE;

  1261.         v->bi_type = 1;

  1262.     }

  1263.     return 0;

  1264. }

  1265. 

  1266. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1267. {

  1268.     int pqindex, lowquant;

  1269.     int status;

  1270. 

  1271.     v->p_frame_skipped = 0;

  1272. 

  1273.     if(v->interlace){

  1274.         v->fcm = decode012(gb);

  1275.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1276.     }

  1277.     switch(get_unary(gb, 0, 4)) {

  1278.     case 0:

  1279.         v->s.pict_type = FF_P_TYPE;

  1280.         break;

  1281.     case 1:

  1282.         v->s.pict_type = FF_B_TYPE;

  1283.         break;

  1284.     case 2:

  1285.         v->s.pict_type = FF_I_TYPE;

  1286.         break;

  1287.     case 3:

  1288.         v->s.pict_type = FF_BI_TYPE;

  1289.         break;

  1290.     case 4:

  1291.         v->s.pict_type = FF_P_TYPE; // skipped pic

  1292.         v->p_frame_skipped = 1;

  1293.         return 0;

  1294.     }

  1295.     if(v->tfcntrflag)

  1296.         skip_bits(gb, 8);

  1297.     if(v->broadcast) {

  1298.         if(!v->interlace || v->psf) {

  1299.             v->rptfrm = get_bits(gb, 2);

  1300.         } else {

  1301.             v->tff = get_bits1(gb);

  1302.             v->rptfrm = get_bits1(gb);

  1303.         }

  1304.     }

  1305.     if(v->panscanflag) {

  1306.         //...

  1307.     }

  1308.     v->rnd = get_bits1(gb);

  1309.     if(v->interlace)

  1310.         v->uvsamp = get_bits1(gb);

  1311.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1312.     if(v->s.pict_type == FF_B_TYPE) {

  1313.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1314.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1315.         if(v->bfraction == 0) {

  1316.             v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */

  1317.         }

  1318.     }

  1319.     pqindex = get_bits(gb, 5);

  1320.     if(!pqindex) return -1;

  1321.     v->pqindex = pqindex;

  1322.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1323.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1324.     else

  1325.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1326. 

  1327.     v->pquantizer = 1;

  1328.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1329.         v->pquantizer = pqindex < 9;

  1330.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1331.         v->pquantizer = 0;

  1332.     v->pqindex = pqindex;

  1333.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1334.     else v->halfpq = 0;

  1335.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1336.         v->pquantizer = get_bits1(gb);

  1337.     if(v->postprocflag)

  1338.         v->postproc = get_bits(gb, 2);

  1339. 

  1340.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1341. 

  1342.     switch(v->s.pict_type) {

  1343.     case FF_I_TYPE:

  1344.     case FF_BI_TYPE:

  1345.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1346.         if (status < 0) return -1;

  1347.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1348.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1349.         v->condover = CONDOVER_NONE;

  1350.         if(v->overlap && v->pq <= 8) {

  1351.             v->condover = decode012(gb);

  1352.             if(v->condover == CONDOVER_SELECT) {

  1353.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1354.                 if (status < 0) return -1;

  1355.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1356.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1357.             }

  1358.         }

  1359.         break;

  1360.     case FF_P_TYPE:

  1361.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1362.         else v->mvrange = 0;

  1363.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1364.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1365.         v->range_x = 1 << (v->k_x - 1);

  1366.         v->range_y = 1 << (v->k_y - 1);

  1367. 

  1368.         if (v->pq < 5) v->tt_index = 0;

  1369.         else if(v->pq < 13) v->tt_index = 1;

  1370.         else v->tt_index = 2;

  1371. 

  1372.         lowquant = (v->pq > 12) ? 0 : 1;

  1373.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1374.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1375.         {

  1376.             int scale, shift, i;

  1377.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1378.             v->lumscale = get_bits(gb, 6);

  1379.             v->lumshift = get_bits(gb, 6);

  1380.             /* fill lookup tables for intensity compensation */

  1381.             if(!v->lumscale) {

  1382.                 scale = -64;

  1383.                 shift = (255 - v->lumshift * 2) << 6;

  1384.                 if(v->lumshift > 31)

  1385.                     shift += 128 << 6;

  1386.             } else {

  1387.                 scale = v->lumscale + 32;

  1388.                 if(v->lumshift > 31)

  1389.                     shift = (v->lumshift - 64) << 6;

  1390.                 else

  1391.                     shift = v->lumshift << 6;

  1392.             }

  1393.             for(i = 0; i < 256; i++) {

  1394.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1395.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1396.             }

  1397.             v->use_ic = 1;

  1398.         }

  1399.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1400.             v->s.quarter_sample = 0;

  1401.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1402.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1403.                 v->s.quarter_sample = 0;

  1404.             else

  1405.                 v->s.quarter_sample = 1;

  1406.         } else

  1407.             v->s.quarter_sample = 1;

  1408.         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));

  1409. 

  1410.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1411.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1412.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1413.         {

  1414.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1415.             if (status < 0) return -1;

  1416.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1417.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1418.         } else {

  1419.             v->mv_type_is_raw = 0;

  1420.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1421.         }

  1422.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1423.         if (status < 0) return -1;

  1424.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1425.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1426. 

  1427.         /* Hopefully this is correct for P frames */

  1428.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1429.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1430.         if (v->dquant)

  1431.         {

  1432.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1433.             vop_dquant_decoding(v);

  1434.         }

  1435. 

  1436.         v->ttfrm = 0; //FIXME Is that so ?

  1437.         if (v->vstransform)

  1438.         {

  1439.             v->ttmbf = get_bits1(gb);

  1440.             if (v->ttmbf)

  1441.             {

  1442.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1443.             }

  1444.         } else {

  1445.             v->ttmbf = 1;

  1446.             v->ttfrm = TT_8X8;

  1447.         }

  1448.         break;

  1449.     case FF_B_TYPE:

  1450.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1451.         else v->mvrange = 0;

  1452.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1453.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1454.         v->range_x = 1 << (v->k_x - 1);

  1455.         v->range_y = 1 << (v->k_y - 1);

  1456. 

  1457.         if (v->pq < 5) v->tt_index = 0;

  1458.         else if(v->pq < 13) v->tt_index = 1;

  1459.         else v->tt_index = 2;

  1460. 

  1461.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1462.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1463.         v->s.mspel = v->s.quarter_sample;

  1464. 

  1465.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1466.         if (status < 0) return -1;

  1467.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1468.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1469.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1470.         if (status < 0) return -1;

  1471.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1472.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1473. 

  1474.         v->s.mv_table_index = get_bits(gb, 2);

  1475.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1476. 

  1477.         if (v->dquant)

  1478.         {

  1479.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1480.             vop_dquant_decoding(v);

  1481.         }

  1482. 

  1483.         v->ttfrm = 0;

  1484.         if (v->vstransform)

  1485.         {

  1486.             v->ttmbf = get_bits1(gb);

  1487.             if (v->ttmbf)

  1488.             {

  1489.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1490.             }

  1491.         } else {

  1492.             v->ttmbf = 1;

  1493.             v->ttfrm = TT_8X8;

  1494.         }

  1495.         break;

  1496.     }

  1497. 

  1498.     /* AC Syntax */

  1499.     v->c_ac_table_index = decode012(gb);

  1500.     if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1501.     {

  1502.         v->y_ac_table_index = decode012(gb);

  1503.     }

  1504.     /* DC Syntax */

  1505.     v->s.dc_table_index = get_bits1(gb);

  1506.     if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {

  1507.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1508.         vop_dquant_decoding(v);

  1509.     }

  1510. 

  1511.     v->bi_type = 0;

  1512.     if(v->s.pict_type == FF_BI_TYPE) {

  1513.         v->s.pict_type = FF_B_TYPE;

  1514.         v->bi_type = 1;

  1515.     }

  1516.     return 0;

  1517. }

  1518. 

  1519. /***********************************************************************/

  1520. /**

  1521.  * @defgroup vc1block VC-1 Block-level functions

  1522.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1523.  * @{

  1524.  */

  1525. 

  1526. /**

  1527.  * @def GET_MQUANT

  1528.  * @brief Get macroblock-level quantizer scale

  1529.  */

  1530. #define GET_MQUANT()                                           \

  1531.   if (v->dquantfrm)                                            \

  1532.   {                                                            \

  1533.     int edges = 0;                                             \

  1534.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1535.     {                                                          \

  1536.       if (v->dqbilevel)                                        \

  1537.       {                                                        \

  1538.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1539.       }                                                        \

  1540.       else                                                     \

  1541.       {                                                        \

  1542.         mqdiff = get_bits(gb, 3);                              \

  1543.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1544.         else mquant = get_bits(gb, 5);                         \

  1545.       }                                                        \

  1546.     }                                                          \

  1547.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1548.         edges = 1 << v->dqsbedge;                              \

  1549.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1550.         edges = (3 << v->dqsbedge) % 15;                       \

  1551.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1552.         edges = 15;                                            \

  1553.     if((edges&1) && !s->mb_x)                                  \

  1554.         mquant = v->altpq;                                     \

  1555.     if((edges&2) && s->first_slice_line)                       \

  1556.         mquant = v->altpq;                                     \

  1557.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1558.         mquant = v->altpq;                                     \

  1559.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1560.         mquant = v->altpq;                                     \

  1561.   }

  1562. 

  1563. /**

  1564.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1565.  * @brief Get MV differentials

  1566.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1567.  * @param _dmv_x Horizontal differential for decoded MV

  1568.  * @param _dmv_y Vertical differential for decoded MV

  1569.  */

  1570. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1571.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1572.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1573.   if (index > 36)                                                   \

  1574.   {                                                                 \

  1575.     mb_has_coeffs = 1;                                              \

  1576.     index -= 37;                                                    \

  1577.   }                                                                 \

  1578.   else mb_has_coeffs = 0;                                           \

  1579.   s->mb_intra = 0;                                                  \

  1580.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1581.   else if (index == 35)                                             \

  1582.   {                                                                 \

  1583.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1584.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1585.   }                                                                 \

  1586.   else if (index == 36)                                             \

  1587.   {                                                                 \

  1588.     _dmv_x = 0;                                                     \

  1589.     _dmv_y = 0;                                                     \

  1590.     s->mb_intra = 1;                                                \

  1591.   }                                                                 \

  1592.   else                                                              \

  1593.   {                                                                 \

  1594.     index1 = index%6;                                               \

  1595.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1596.     else                                   val = 0;                 \

  1597.     if(size_table[index1] - val > 0)                                \

  1598.         val = get_bits(gb, size_table[index1] - val);               \

  1599.     else                                   val = 0;                 \

  1600.     sign = 0 - (val&1);                                             \

  1601.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1602.                                                                     \

  1603.     index1 = index/6;                                               \

  1604.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1605.     else                                   val = 0;                 \

  1606.     if(size_table[index1] - val > 0)                                \

  1607.         val = get_bits(gb, size_table[index1] - val);               \

  1608.     else                                   val = 0;                 \

  1609.     sign = 0 - (val&1);                                             \

  1610.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1611.   }

  1612. 

  1613. /** Predict and set motion vector

  1614.  */

  1615. 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)

  1616. {

  1617.     int xy, wrap, off = 0;

  1618.     int16_t *A, *B, *C;

  1619.     int px, py;

  1620.     int sum;

  1621. 

  1622.     /* scale MV difference to be quad-pel */

  1623.     dmv_x <<= 1 - s->quarter_sample;

  1624.     dmv_y <<= 1 - s->quarter_sample;

  1625. 

  1626.     wrap = s->b8_stride;

  1627.     xy = s->block_index[n];

  1628. 

  1629.     if(s->mb_intra){

  1630.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1631.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

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

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

  1634.         if(mv1) { /* duplicate motion data for 1-MV block */

  1635.             s->current_picture.motion_val[0][xy + 1][0] = 0;

  1636.             s->current_picture.motion_val[0][xy + 1][1] = 0;

  1637.             s->current_picture.motion_val[0][xy + wrap][0] = 0;

  1638.             s->current_picture.motion_val[0][xy + wrap][1] = 0;

  1639.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  1640.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  1641.             s->current_picture.motion_val[1][xy + 1][0] = 0;

  1642.             s->current_picture.motion_val[1][xy + 1][1] = 0;

  1643.             s->current_picture.motion_val[1][xy + wrap][0] = 0;

  1644.             s->current_picture.motion_val[1][xy + wrap][1] = 0;

  1645.             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;

  1646.             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;

  1647.         }

  1648.         return;

  1649.     }

  1650. 

  1651.     C = s->current_picture.motion_val[0][xy - 1];

  1652.     A = s->current_picture.motion_val[0][xy - wrap];

  1653.     if(mv1)

  1654.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1655.     else {

  1656.         //in 4-MV mode different blocks have different B predictor position

  1657.         switch(n){

  1658.         case 0:

  1659.             off = (s->mb_x > 0) ? -1 : 1;

  1660.             break;

  1661.         case 1:

  1662.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1663.             break;

  1664.         case 2:

  1665.             off = 1;

  1666.             break;

  1667.         case 3:

  1668.             off = -1;

  1669.         }

  1670.     }

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

  1672. 

  1673.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1674.         if(s->mb_width == 1) {

  1675.             px = A[0];

  1676.             py = A[1];

  1677.         } else {

  1678.             px = mid_pred(A[0], B[0], C[0]);

  1679.             py = mid_pred(A[1], B[1], C[1]);

  1680.         }

  1681.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1682.         px = C[0];

  1683.         py = C[1];

  1684.     } else {

  1685.         px = py = 0;

  1686.     }

  1687.     /* Pullback MV as specified in 8.3.5.3.4 */

  1688.     {

  1689.         int qx, qy, X, Y;

  1690.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1691.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1692.         X = (s->mb_width << 6) - 4;

  1693.         Y = (s->mb_height << 6) - 4;

  1694.         if(mv1) {

  1695.             if(qx + px < -60) px = -60 - qx;

  1696.             if(qy + py < -60) py = -60 - qy;

  1697.         } else {

  1698.             if(qx + px < -28) px = -28 - qx;

  1699.             if(qy + py < -28) py = -28 - qy;

  1700.         }

  1701.         if(qx + px > X) px = X - qx;

  1702.         if(qy + py > Y) py = Y - qy;

  1703.     }

  1704.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1705.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1706.         if(is_intra[xy - wrap])

  1707.             sum = FFABS(px) + FFABS(py);

  1708.         else

  1709.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1710.         if(sum > 32) {

  1711.             if(get_bits1(&s->gb)) {

  1712.                 px = A[0];

  1713.                 py = A[1];

  1714.             } else {

  1715.                 px = C[0];

  1716.                 py = C[1];

  1717.             }

  1718.         } else {

  1719.             if(is_intra[xy - 1])

  1720.                 sum = FFABS(px) + FFABS(py);

  1721.             else

  1722.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1723.             if(sum > 32) {

  1724.                 if(get_bits1(&s->gb)) {

  1725.                     px = A[0];

  1726.                     py = A[1];

  1727.                 } else {

  1728.                     px = C[0];

  1729.                     py = C[1];

  1730.                 }

  1731.             }

  1732.         }

  1733.     }

  1734.     /* store MV using signed modulus of MV range defined in 4.11 */

  1735.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1736.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1737.     if(mv1) { /* duplicate motion data for 1-MV block */

  1738.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  1739.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  1740.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1741.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1742.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1743.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1744.     }

  1745. }

  1746. 

  1747. /** Motion compensation for direct or interpolated blocks in B-frames

  1748.  */

  1749. static void vc1_interp_mc(VC1Context *v)

  1750. {

  1751.     MpegEncContext *s = &v->s;

  1752.     DSPContext *dsp = &v->s.dsp;

  1753.     uint8_t *srcY, *srcU, *srcV;

  1754.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1755. 

  1756.     if(!v->s.next_picture.data[0])return;

  1757. 

  1758.     mx = s->mv[1][0][0];

  1759.     my = s->mv[1][0][1];

  1760.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1761.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1762.     if(v->fastuvmc) {

  1763.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1764.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1765.     }

  1766.     srcY = s->next_picture.data[0];

  1767.     srcU = s->next_picture.data[1];

  1768.     srcV = s->next_picture.data[2];

  1769. 

  1770.     src_x = s->mb_x * 16 + (mx >> 2);

  1771.     src_y = s->mb_y * 16 + (my >> 2);

  1772.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1773.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1774. 

  1775.     if(v->profile != PROFILE_ADVANCED){

  1776.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1777.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1778.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1779.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1780.     }else{

  1781.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1782.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1783.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1784.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1785.     }

  1786. 

  1787.     srcY += src_y * s->linesize + src_x;

  1788.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1789.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1790. 

  1791.     /* for grayscale we should not try to read from unknown area */

  1792.     if(s->flags & CODEC_FLAG_GRAY) {

  1793.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1794.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1795.     }

  1796. 

  1797.     if(v->rangeredfrm

  1798.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  1799.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  1800.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1801. 

  1802.         srcY -= s->mspel * (1 + s->linesize);

  1803.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1804.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1805.         srcY = s->edge_emu_buffer;

  1806.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1807.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1808.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1809.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1810.         srcU = uvbuf;

  1811.         srcV = uvbuf + 16;

  1812.         /* if we deal with range reduction we need to scale source blocks */

  1813.         if(v->rangeredfrm) {

  1814.             int i, j;

  1815.             uint8_t *src, *src2;

  1816. 

  1817.             src = srcY;

  1818.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1819.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1820.                 src += s->linesize;

  1821.             }

  1822.             src = srcU; src2 = srcV;

  1823.             for(j = 0; j < 9; j++) {

  1824.                 for(i = 0; i < 9; i++) {

  1825.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1826.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1827.                 }

  1828.                 src += s->uvlinesize;

  1829.                 src2 += s->uvlinesize;

  1830.             }

  1831.         }

  1832.         srcY += s->mspel * (1 + s->linesize);

  1833.     }

  1834. 

  1835.     if(s->mspel) {

  1836.         dxy = ((my & 3) << 2) | (mx & 3);

  1837.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  1838.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);

  1839.         srcY += s->linesize * 8;

  1840.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  1841.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  1842.     } else { // hpel mc

  1843.         dxy = (my & 2) | ((mx & 2) >> 1);

  1844. 

  1845.         if(!v->rnd)

  1846.             dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1847.         else

  1848.             dsp->avg_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1849.     }

  1850. 

  1851.     if(s->flags & CODEC_FLAG_GRAY) return;

  1852.     /* Chroma MC always uses qpel blilinear */

  1853.     uvmx = (uvmx&3)<<1;

  1854.     uvmy = (uvmy&3)<<1;

  1855.     if(!v->rnd){

  1856.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1857.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1858.     }else{

  1859.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1860.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1861.     }

  1862. }

  1863. 

  1864. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1865. {

  1866.     int n = bfrac;

  1867. 

  1868. #if B_FRACTION_DEN==256

  1869.     if(inv)

  1870.         n -= 256;

  1871.     if(!qs)

  1872.         return 2 * ((value * n + 255) >> 9);

  1873.     return (value * n + 128) >> 8;

  1874. #else

  1875.     if(inv)

  1876.         n -= B_FRACTION_DEN;

  1877.     if(!qs)

  1878.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1879.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1880. #endif

  1881. }

  1882. 

  1883. /** Reconstruct motion vector for B-frame and do motion compensation

  1884.  */

  1885. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1886. {

  1887.     if(v->use_ic) {

  1888.         v->mv_mode2 = v->mv_mode;

  1889.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1890.     }

  1891.     if(direct) {

  1892.         vc1_mc_1mv(v, 0);

  1893.         vc1_interp_mc(v);

  1894.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1895.         return;

  1896.     }

  1897.     if(mode == BMV_TYPE_INTERPOLATED) {

  1898.         vc1_mc_1mv(v, 0);

  1899.         vc1_interp_mc(v);

  1900.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1901.         return;

  1902.     }

  1903. 

  1904.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1905.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1906.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1907. }

  1908. 

  1909. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1910. {

  1911.     MpegEncContext *s = &v->s;

  1912.     int xy, wrap, off = 0;

  1913.     int16_t *A, *B, *C;

  1914.     int px, py;

  1915.     int sum;

  1916.     int r_x, r_y;

  1917.     const uint8_t *is_intra = v->mb_type[0];

  1918. 

  1919.     r_x = v->range_x;

  1920.     r_y = v->range_y;

  1921.     /* scale MV difference to be quad-pel */

  1922.     dmv_x[0] <<= 1 - s->quarter_sample;

  1923.     dmv_y[0] <<= 1 - s->quarter_sample;

  1924.     dmv_x[1] <<= 1 - s->quarter_sample;

  1925.     dmv_y[1] <<= 1 - s->quarter_sample;

  1926. 

  1927.     wrap = s->b8_stride;

  1928.     xy = s->block_index[0];

  1929. 

  1930.     if(s->mb_intra) {

  1931.         s->current_picture.motion_val[0][xy][0] =

  1932.         s->current_picture.motion_val[0][xy][1] =

  1933.         s->current_picture.motion_val[1][xy][0] =

  1934.         s->current_picture.motion_val[1][xy][1] = 0;

  1935.         return;

  1936.     }

  1937.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  1938.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  1939.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  1940.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  1941. 

  1942.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  1943.     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));

  1944.     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));

  1945.     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));

  1946.     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));

  1947.     if(direct) {

  1948.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  1949.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  1950.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  1951.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  1952.         return;

  1953.     }

  1954. 

  1955.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  1956.         C = s->current_picture.motion_val[0][xy - 2];

  1957.         A = s->current_picture.motion_val[0][xy - wrap*2];

  1958.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1959.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  1960. 

  1961.         if(!s->mb_x) C[0] = C[1] = 0;

  1962.         if(!s->first_slice_line) { // predictor A is not out of bounds

  1963.             if(s->mb_width == 1) {

  1964.                 px = A[0];

  1965.                 py = A[1];

  1966.             } else {

  1967.                 px = mid_pred(A[0], B[0], C[0]);

  1968.                 py = mid_pred(A[1], B[1], C[1]);

  1969.             }

  1970.         } else if(s->mb_x) { // predictor C is not out of bounds

  1971.             px = C[0];

  1972.             py = C[1];

  1973.         } else {

  1974.             px = py = 0;

  1975.         }

  1976.         /* Pullback MV as specified in 8.3.5.3.4 */

  1977.         {

  1978.             int qx, qy, X, Y;

  1979.             if(v->profile < PROFILE_ADVANCED) {

  1980.                 qx = (s->mb_x << 5);

  1981.                 qy = (s->mb_y << 5);

  1982.                 X = (s->mb_width << 5) - 4;

  1983.                 Y = (s->mb_height << 5) - 4;

  1984.                 if(qx + px < -28) px = -28 - qx;

  1985.                 if(qy + py < -28) py = -28 - qy;

  1986.                 if(qx + px > X) px = X - qx;

  1987.                 if(qy + py > Y) py = Y - qy;

  1988.             } else {

  1989.                 qx = (s->mb_x << 6);

  1990.                 qy = (s->mb_y << 6);

  1991.                 X = (s->mb_width << 6) - 4;

  1992.                 Y = (s->mb_height << 6) - 4;

  1993.                 if(qx + px < -60) px = -60 - qx;

  1994.                 if(qy + py < -60) py = -60 - qy;

  1995.                 if(qx + px > X) px = X - qx;

  1996.                 if(qy + py > Y) py = Y - qy;

  1997.             }

  1998.         }

  1999.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2000.         if(0 && !s->first_slice_line && s->mb_x) {

  2001.             if(is_intra[xy - wrap])

  2002.                 sum = FFABS(px) + FFABS(py);

  2003.             else

  2004.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2005.             if(sum > 32) {

  2006.                 if(get_bits1(&s->gb)) {

  2007.                     px = A[0];

  2008.                     py = A[1];

  2009.                 } else {

  2010.                     px = C[0];

  2011.                     py = C[1];

  2012.                 }

  2013.             } else {

  2014.                 if(is_intra[xy - 2])

  2015.                     sum = FFABS(px) + FFABS(py);

  2016.                 else

  2017.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2018.                 if(sum > 32) {

  2019.                     if(get_bits1(&s->gb)) {

  2020.                         px = A[0];

  2021.                         py = A[1];

  2022.                     } else {

  2023.                         px = C[0];

  2024.                         py = C[1];

  2025.                     }

  2026.                 }

  2027.             }

  2028.         }

  2029.         /* store MV using signed modulus of MV range defined in 4.11 */

  2030.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2031.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2032.     }

  2033.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2034.         C = s->current_picture.motion_val[1][xy - 2];

  2035.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2036.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2037.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2038. 

  2039.         if(!s->mb_x) C[0] = C[1] = 0;

  2040.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2041.             if(s->mb_width == 1) {

  2042.                 px = A[0];

  2043.                 py = A[1];

  2044.             } else {

  2045.                 px = mid_pred(A[0], B[0], C[0]);

  2046.                 py = mid_pred(A[1], B[1], C[1]);

  2047.             }

  2048.         } else if(s->mb_x) { // predictor C is not out of bounds

  2049.             px = C[0];

  2050.             py = C[1];

  2051.         } else {

  2052.             px = py = 0;

  2053.         }

  2054.         /* Pullback MV as specified in 8.3.5.3.4 */

  2055.         {

  2056.             int qx, qy, X, Y;

  2057.             if(v->profile < PROFILE_ADVANCED) {

  2058.                 qx = (s->mb_x << 5);

  2059.                 qy = (s->mb_y << 5);

  2060.                 X = (s->mb_width << 5) - 4;

  2061.                 Y = (s->mb_height << 5) - 4;

  2062.                 if(qx + px < -28) px = -28 - qx;

  2063.                 if(qy + py < -28) py = -28 - qy;

  2064.                 if(qx + px > X) px = X - qx;

  2065.                 if(qy + py > Y) py = Y - qy;

  2066.             } else {

  2067.                 qx = (s->mb_x << 6);

  2068.                 qy = (s->mb_y << 6);

  2069.                 X = (s->mb_width << 6) - 4;

  2070.                 Y = (s->mb_height << 6) - 4;

  2071.                 if(qx + px < -60) px = -60 - qx;

  2072.                 if(qy + py < -60) py = -60 - qy;

  2073.                 if(qx + px > X) px = X - qx;

  2074.                 if(qy + py > Y) py = Y - qy;

  2075.             }

  2076.         }

  2077.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2078.         if(0 && !s->first_slice_line && s->mb_x) {

  2079.             if(is_intra[xy - wrap])

  2080.                 sum = FFABS(px) + FFABS(py);

  2081.             else

  2082.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2083.             if(sum > 32) {

  2084.                 if(get_bits1(&s->gb)) {

  2085.                     px = A[0];

  2086.                     py = A[1];

  2087.                 } else {

  2088.                     px = C[0];

  2089.                     py = C[1];

  2090.                 }

  2091.             } else {

  2092.                 if(is_intra[xy - 2])

  2093.                     sum = FFABS(px) + FFABS(py);

  2094.                 else

  2095.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2096.                 if(sum > 32) {

  2097.                     if(get_bits1(&s->gb)) {

  2098.                         px = A[0];

  2099.                         py = A[1];

  2100.                     } else {

  2101.                         px = C[0];

  2102.                         py = C[1];

  2103.                     }

  2104.                 }

  2105.             }

  2106.         }

  2107.         /* store MV using signed modulus of MV range defined in 4.11 */

  2108. 

  2109.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2110.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2111.     }

  2112.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2113.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2114.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2115.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2116. }

  2117. 

  2118. /** Get predicted DC value for I-frames only

  2119.  * prediction dir: left=0, top=1

  2120.  * @param s MpegEncContext

  2121.  * @param overlap flag indicating that overlap filtering is used

  2122.  * @param pq integer part of picture quantizer

  2123.  * @param[in] n block index in the current MB

  2124.  * @param dc_val_ptr Pointer to DC predictor

  2125.  * @param dir_ptr Prediction direction for use in AC prediction

  2126.  */

  2127. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2128.                               int16_t **dc_val_ptr, int *dir_ptr)

  2129. {

  2130.     int a, b, c, wrap, pred, scale;

  2131.     int16_t *dc_val;

  2132.     static const uint16_t dcpred[32] = {

  2133.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2134.          114,  102,   93,   85,   79,   73,   68,   64,

  2135.           60,   57,   54,   51,   49,   47,   45,   43,

  2136.           41,   39,   38,   37,   35,   34,   33

  2137.     };

  2138. 

  2139.     /* find prediction - wmv3_dc_scale always used here in fact */

  2140.     if (n < 4)     scale = s->y_dc_scale;

  2141.     else           scale = s->c_dc_scale;

  2142. 

  2143.     wrap = s->block_wrap[n];

  2144.     dc_val= s->dc_val[0] + s->block_index[n];

  2145. 

  2146.     /* B A

  2147.      * C X

  2148.      */

  2149.     c = dc_val[ - 1];

  2150.     b = dc_val[ - 1 - wrap];

  2151.     a = dc_val[ - wrap];

  2152. 

  2153.     if (pq < 9 || !overlap)

  2154.     {

  2155.         /* Set outer values */

  2156.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2157.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2158.     }

  2159.     else

  2160.     {

  2161.         /* Set outer values */

  2162.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2163.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2164.     }

  2165. 

  2166.     if (abs(a - b) <= abs(b - c)) {

  2167.         pred = c;

  2168.         *dir_ptr = 1;//left

  2169.     } else {

  2170.         pred = a;

  2171.         *dir_ptr = 0;//top

  2172.     }

  2173. 

  2174.     /* update predictor */

  2175.     *dc_val_ptr = &dc_val[0];

  2176.     return pred;

  2177. }

  2178. 

  2179. 

  2180. /** Get predicted DC value

  2181.  * prediction dir: left=0, top=1

  2182.  * @param s MpegEncContext

  2183.  * @param overlap flag indicating that overlap filtering is used

  2184.  * @param pq integer part of picture quantizer

  2185.  * @param[in] n block index in the current MB

  2186.  * @param a_avail flag indicating top block availability

  2187.  * @param c_avail flag indicating left block availability

  2188.  * @param dc_val_ptr Pointer to DC predictor

  2189.  * @param dir_ptr Prediction direction for use in AC prediction

  2190.  */

  2191. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2192.                               int a_avail, int c_avail,

  2193.                               int16_t **dc_val_ptr, int *dir_ptr)

  2194. {

  2195.     int a, b, c, wrap, pred;

  2196.     int16_t *dc_val;

  2197.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2198.     int q1, q2 = 0;

  2199. 

  2200.     wrap = s->block_wrap[n];

  2201.     dc_val= s->dc_val[0] + s->block_index[n];

  2202. 

  2203.     /* B A

  2204.      * C X

  2205.      */

  2206.     c = dc_val[ - 1];

  2207.     b = dc_val[ - 1 - wrap];

  2208.     a = dc_val[ - wrap];

  2209.     /* scale predictors if needed */

  2210.     q1 = s->current_picture.qscale_table[mb_pos];

  2211.     if(c_avail && (n!= 1 && n!=3)) {

  2212.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2213.         if(q2 && q2 != q1)

  2214.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2215.     }

  2216.     if(a_avail && (n!= 2 && n!=3)) {

  2217.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2218.         if(q2 && q2 != q1)

  2219.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2220.     }

  2221.     if(a_avail && c_avail && (n!=3)) {

  2222.         int off = mb_pos;

  2223.         if(n != 1) off--;

  2224.         if(n != 2) off -= s->mb_stride;

  2225.         q2 = s->current_picture.qscale_table[off];

  2226.         if(q2 && q2 != q1)

  2227.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2228.     }

  2229. 

  2230.     if(a_avail && c_avail) {

  2231.         if(abs(a - b) <= abs(b - c)) {

  2232.             pred = c;

  2233.             *dir_ptr = 1;//left

  2234.         } else {

  2235.             pred = a;

  2236.             *dir_ptr = 0;//top

  2237.         }

  2238.     } else if(a_avail) {

  2239.         pred = a;

  2240.         *dir_ptr = 0;//top

  2241.     } else if(c_avail) {

  2242.         pred = c;

  2243.         *dir_ptr = 1;//left

  2244.     } else {

  2245.         pred = 0;

  2246.         *dir_ptr = 1;//left

  2247.     }

  2248. 

  2249.     /* update predictor */

  2250.     *dc_val_ptr = &dc_val[0];

  2251.     return pred;

  2252. }

  2253. 

  2254. /** @} */ // Block group

  2255. 

  2256. /**

  2257.  * @defgroup vc1_std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2258.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2259.  * @{

  2260.  */

  2261. 

  2262. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2263. {

  2264.     int xy, wrap, pred, a, b, c;

  2265. 

  2266.     xy = s->block_index[n];

  2267.     wrap = s->b8_stride;

  2268. 

  2269.     /* B C

  2270.      * A X

  2271.      */

  2272.     a = s->coded_block[xy - 1       ];

  2273.     b = s->coded_block[xy - 1 - wrap];

  2274.     c = s->coded_block[xy     - wrap];

  2275. 

  2276.     if (b == c) {

  2277.         pred = a;

  2278.     } else {

  2279.         pred = c;

  2280.     }

  2281. 

  2282.     /* store value */

  2283.     *coded_block_ptr = &s->coded_block[xy];

  2284. 

  2285.     return pred;

  2286. }

  2287. 

  2288. /**

  2289.  * Decode one AC coefficient

  2290.  * @param v The VC1 context

  2291.  * @param last Last coefficient

  2292.  * @param skip How much zero coefficients to skip

  2293.  * @param value Decoded AC coefficient value

  2294.  * @param codingset set of VLC to decode data

  2295.  * @see 8.1.3.4

  2296.  */

  2297. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2298. {

  2299.     GetBitContext *gb = &v->s.gb;

  2300.     int index, escape, run = 0, level = 0, lst = 0;

  2301. 

  2302.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2303.     if (index != vc1_ac_sizes[codingset] - 1) {

  2304.         run = vc1_index_decode_table[codingset][index][0];

  2305.         level = vc1_index_decode_table[codingset][index][1];

  2306.         lst = index >= vc1_last_decode_table[codingset];

  2307.         if(get_bits1(gb))

  2308.             level = -level;

  2309.     } else {

  2310.         escape = decode210(gb);

  2311.         if (escape != 2) {

  2312.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2313.             run = vc1_index_decode_table[codingset][index][0];

  2314.             level = vc1_index_decode_table[codingset][index][1];

  2315.             lst = index >= vc1_last_decode_table[codingset];

  2316.             if(escape == 0) {

  2317.                 if(lst)

  2318.                     level += vc1_last_delta_level_table[codingset][run];

  2319.                 else

  2320.                     level += vc1_delta_level_table[codingset][run];

  2321.             } else {

  2322.                 if(lst)

  2323.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2324.                 else

  2325.                     run += vc1_delta_run_table[codingset][level] + 1;

  2326.             }

  2327.             if(get_bits1(gb))

  2328.                 level = -level;

  2329.         } else {

  2330.             int sign;

  2331.             lst = get_bits1(gb);

  2332.             if(v->s.esc3_level_length == 0) {

  2333.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2334.                     v->s.esc3_level_length = get_bits(gb, 3);

  2335.                     if(!v->s.esc3_level_length)

  2336.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2337.                 } else { //table 60

  2338.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2339.                 }

  2340.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2341.             }

  2342.             run = get_bits(gb, v->s.esc3_run_length);

  2343.             sign = get_bits1(gb);

  2344.             level = get_bits(gb, v->s.esc3_level_length);

  2345.             if(sign)

  2346.                 level = -level;

  2347.         }

  2348.     }

  2349. 

  2350.     *last = lst;

  2351.     *skip = run;

  2352.     *value = level;

  2353. }

  2354. 

  2355. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2356.  * @param v VC1Context

  2357.  * @param block block to decode

  2358.  * @param[in] n subblock index

  2359.  * @param coded are AC coeffs present or not

  2360.  * @param codingset set of VLC to decode data

  2361.  */

  2362. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2363. {

  2364.     GetBitContext *gb = &v->s.gb;

  2365.     MpegEncContext *s = &v->s;

  2366.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2367.     int run_diff, i;

  2368.     int16_t *dc_val;

  2369.     int16_t *ac_val, *ac_val2;

  2370.     int dcdiff;

  2371. 

  2372.     /* Get DC differential */

  2373.     if (n < 4) {

  2374.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2375.     } else {

  2376.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2377.     }

  2378.     if (dcdiff < 0){

  2379.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2380.         return -1;

  2381.     }

  2382.     if (dcdiff)

  2383.     {

  2384.         if (dcdiff == 119 /* ESC index value */)

  2385.         {

  2386.             /* TODO: Optimize */

  2387.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2388.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2389.             else dcdiff = get_bits(gb, 8);

  2390.         }

  2391.         else

  2392.         {

  2393.             if (v->pq == 1)

  2394.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2395.             else if (v->pq == 2)

  2396.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2397.         }

  2398.         if (get_bits1(gb))

  2399.             dcdiff = -dcdiff;

  2400.     }

  2401. 

  2402.     /* Prediction */

  2403.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2404.     *dc_val = dcdiff;

  2405. 

  2406.     /* Store the quantized DC coeff, used for prediction */

  2407.     if (n < 4) {

  2408.         block[0] = dcdiff * s->y_dc_scale;

  2409.     } else {

  2410.         block[0] = dcdiff * s->c_dc_scale;

  2411.     }

  2412.     /* Skip ? */

  2413.     run_diff = 0;

  2414.     if (!coded) {

  2415.         goto not_coded;

  2416.     }

  2417. 

  2418.     //AC Decoding

  2419.     i = 1;

  2420. 

  2421.     {

  2422.         int last = 0, skip, value;

  2423.         const int8_t *zz_table;

  2424.         int scale;

  2425.         int k;

  2426. 

  2427.         scale = v->pq * 2 + v->halfpq;

  2428. 

  2429.         if(v->s.ac_pred) {

  2430.             if(!dc_pred_dir)

  2431.                 zz_table = wmv1_scantable[2];

  2432.             else

  2433.                 zz_table = wmv1_scantable[3];

  2434.         } else

  2435.             zz_table = wmv1_scantable[1];

  2436. 

  2437.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2438.         ac_val2 = ac_val;

  2439.         if(dc_pred_dir) //left

  2440.             ac_val -= 16;

  2441.         else //top

  2442.             ac_val -= 16 * s->block_wrap[n];

  2443. 

  2444.         while (!last) {

  2445.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2446.             i += skip;

  2447.             if(i > 63)

  2448.                 break;

  2449.             block[zz_table[i++]] = value;

  2450.         }

  2451. 

  2452.         /* apply AC prediction if needed */

  2453.         if(s->ac_pred) {

  2454.             if(dc_pred_dir) { //left

  2455.                 for(k = 1; k < 8; k++)

  2456.                     block[k << 3] += ac_val[k];

  2457.             } else { //top

  2458.                 for(k = 1; k < 8; k++)

  2459.                     block[k] += ac_val[k + 8];

  2460.             }

  2461.         }

  2462.         /* save AC coeffs for further prediction */

  2463.         for(k = 1; k < 8; k++) {

  2464.             ac_val2[k] = block[k << 3];

  2465.             ac_val2[k + 8] = block[k];

  2466.         }

  2467. 

  2468.         /* scale AC coeffs */

  2469.         for(k = 1; k < 64; k++)

  2470.             if(block[k]) {

  2471.                 block[k] *= scale;

  2472.                 if(!v->pquantizer)

  2473.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2474.             }

  2475. 

  2476.         if(s->ac_pred) i = 63;

  2477.     }

  2478. 

  2479. not_coded:

  2480.     if(!coded) {

  2481.         int k, scale;

  2482.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2483.         ac_val2 = ac_val;

  2484. 

  2485.         i = 0;

  2486.         scale = v->pq * 2 + v->halfpq;

  2487.         memset(ac_val2, 0, 16 * 2);

  2488.         if(dc_pred_dir) {//left

  2489.             ac_val -= 16;

  2490.             if(s->ac_pred)

  2491.                 memcpy(ac_val2, ac_val, 8 * 2);

  2492.         } else {//top

  2493.             ac_val -= 16 * s->block_wrap[n];

  2494.             if(s->ac_pred)

  2495.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2496.         }

  2497. 

  2498.         /* apply AC prediction if needed */

  2499.         if(s->ac_pred) {

  2500.             if(dc_pred_dir) { //left

  2501.                 for(k = 1; k < 8; k++) {

  2502.                     block[k << 3] = ac_val[k] * scale;

  2503.                     if(!v->pquantizer && block[k << 3])

  2504.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2505.                 }

  2506.             } else { //top

  2507.                 for(k = 1; k < 8; k++) {

  2508.                     block[k] = ac_val[k + 8] * scale;

  2509.                     if(!v->pquantizer && block[k])

  2510.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2511.                 }

  2512.             }

  2513.             i = 63;

  2514.         }

  2515.     }

  2516.     s->block_last_index[n] = i;

  2517. 

  2518.     return 0;

  2519. }

  2520. 

  2521. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2522.  * @param v VC1Context

  2523.  * @param block block to decode

  2524.  * @param[in] n subblock number

  2525.  * @param coded are AC coeffs present or not

  2526.  * @param codingset set of VLC to decode data

  2527.  * @param mquant quantizer value for this macroblock

  2528.  */

  2529. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2530. {

  2531.     GetBitContext *gb = &v->s.gb;

  2532.     MpegEncContext *s = &v->s;

  2533.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2534.     int run_diff, i;

  2535.     int16_t *dc_val;

  2536.     int16_t *ac_val, *ac_val2;

  2537.     int dcdiff;

  2538.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2539.     int use_pred = s->ac_pred;

  2540.     int scale;

  2541.     int q1, q2 = 0;

  2542.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2543. 

  2544.     /* Get DC differential */

  2545.     if (n < 4) {

  2546.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2547.     } else {

  2548.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2549.     }

  2550.     if (dcdiff < 0){

  2551.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2552.         return -1;

  2553.     }

  2554.     if (dcdiff)

  2555.     {

  2556.         if (dcdiff == 119 /* ESC index value */)

  2557.         {

  2558.             /* TODO: Optimize */

  2559.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2560.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2561.             else dcdiff = get_bits(gb, 8);

  2562.         }

  2563.         else

  2564.         {

  2565.             if (mquant == 1)

  2566.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2567.             else if (mquant == 2)

  2568.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2569.         }

  2570.         if (get_bits1(gb))

  2571.             dcdiff = -dcdiff;

  2572.     }

  2573. 

  2574.     /* Prediction */

  2575.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2576.     *dc_val = dcdiff;

  2577. 

  2578.     /* Store the quantized DC coeff, used for prediction */

  2579.     if (n < 4) {

  2580.         block[0] = dcdiff * s->y_dc_scale;

  2581.     } else {

  2582.         block[0] = dcdiff * s->c_dc_scale;

  2583.     }

  2584.     /* Skip ? */

  2585.     run_diff = 0;

  2586. 

  2587.     //AC Decoding

  2588.     i = 1;

  2589. 

  2590.     /* check if AC is needed at all */

  2591.     if(!a_avail && !c_avail) use_pred = 0;

  2592.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2593.     ac_val2 = ac_val;

  2594. 

  2595.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2596. 

  2597.     if(dc_pred_dir) //left

  2598.         ac_val -= 16;

  2599.     else //top

  2600.         ac_val -= 16 * s->block_wrap[n];

  2601. 

  2602.     q1 = s->current_picture.qscale_table[mb_pos];

  2603.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2604.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2605.     if(dc_pred_dir && n==1) q2 = q1;

  2606.     if(!dc_pred_dir && n==2) q2 = q1;

  2607.     if(n==3) q2 = q1;

  2608. 

  2609.     if(coded) {

  2610.         int last = 0, skip, value;

  2611.         const int8_t *zz_table;

  2612.         int k;

  2613. 

  2614.         if(v->s.ac_pred) {

  2615.             if(!dc_pred_dir)

  2616.                 zz_table = wmv1_scantable[2];

  2617.             else

  2618.                 zz_table = wmv1_scantable[3];

  2619.         } else

  2620.             zz_table = wmv1_scantable[1];

  2621. 

  2622.         while (!last) {

  2623.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2624.             i += skip;

  2625.             if(i > 63)

  2626.                 break;

  2627.             block[zz_table[i++]] = value;

  2628.         }

  2629. 

  2630.         /* apply AC prediction if needed */

  2631.         if(use_pred) {

  2632.             /* scale predictors if needed*/

  2633.             if(q2 && q1!=q2) {

  2634.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2635.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2636. 

  2637.                 if(dc_pred_dir) { //left

  2638.                     for(k = 1; k < 8; k++)

  2639.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2640.                 } else { //top

  2641.                     for(k = 1; k < 8; k++)

  2642.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2643.                 }

  2644.             } else {

  2645.                 if(dc_pred_dir) { //left

  2646.                     for(k = 1; k < 8; k++)

  2647.                         block[k << 3] += ac_val[k];

  2648.                 } else { //top

  2649.                     for(k = 1; k < 8; k++)

  2650.                         block[k] += ac_val[k + 8];

  2651.                 }

  2652.             }

  2653.         }

  2654.         /* save AC coeffs for further prediction */

  2655.         for(k = 1; k < 8; k++) {

  2656.             ac_val2[k] = block[k << 3];

  2657.             ac_val2[k + 8] = block[k];

  2658.         }

  2659. 

  2660.         /* scale AC coeffs */

  2661.         for(k = 1; k < 64; k++)

  2662.             if(block[k]) {

  2663.                 block[k] *= scale;

  2664.                 if(!v->pquantizer)

  2665.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2666.             }

  2667. 

  2668.         if(use_pred) i = 63;

  2669.     } else { // no AC coeffs

  2670.         int k;

  2671. 

  2672.         memset(ac_val2, 0, 16 * 2);

  2673.         if(dc_pred_dir) {//left

  2674.             if(use_pred) {

  2675.                 memcpy(ac_val2, ac_val, 8 * 2);

  2676.                 if(q2 && q1!=q2) {

  2677.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2678.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2679.                     for(k = 1; k < 8; k++)

  2680.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2681.                 }

  2682.             }

  2683.         } else {//top

  2684.             if(use_pred) {

  2685.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2686.                 if(q2 && q1!=q2) {

  2687.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2688.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2689.                     for(k = 1; k < 8; k++)

  2690.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2691.                 }

  2692.             }

  2693.         }

  2694. 

  2695.         /* apply AC prediction if needed */

  2696.         if(use_pred) {

  2697.             if(dc_pred_dir) { //left

  2698.                 for(k = 1; k < 8; k++) {

  2699.                     block[k << 3] = ac_val2[k] * scale;

  2700.                     if(!v->pquantizer && block[k << 3])

  2701.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2702.                 }

  2703.             } else { //top

  2704.                 for(k = 1; k < 8; k++) {

  2705.                     block[k] = ac_val2[k + 8] * scale;

  2706.                     if(!v->pquantizer && block[k])

  2707.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2708.                 }

  2709.             }

  2710.             i = 63;

  2711.         }

  2712.     }

  2713.     s->block_last_index[n] = i;

  2714. 

  2715.     return 0;

  2716. }

  2717. 

  2718. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2719.  * @param v VC1Context

  2720.  * @param block block to decode

  2721.  * @param[in] n subblock index

  2722.  * @param coded are AC coeffs present or not

  2723.  * @param mquant block quantizer

  2724.  * @param codingset set of VLC to decode data

  2725.  */

  2726. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2727. {

  2728.     GetBitContext *gb = &v->s.gb;

  2729.     MpegEncContext *s = &v->s;

  2730.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2731.     int run_diff, i;

  2732.     int16_t *dc_val;

  2733.     int16_t *ac_val, *ac_val2;

  2734.     int dcdiff;

  2735.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2736.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2737.     int use_pred = s->ac_pred;

  2738.     int scale;

  2739.     int q1, q2 = 0;

  2740. 

  2741.     /* XXX: Guard against dumb values of mquant */

  2742.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2743. 

  2744.     /* Set DC scale - y and c use the same */

  2745.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2746.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2747. 

  2748.     /* Get DC differential */

  2749.     if (n < 4) {

  2750.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2751.     } else {

  2752.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2753.     }

  2754.     if (dcdiff < 0){

  2755.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2756.         return -1;

  2757.     }

  2758.     if (dcdiff)

  2759.     {

  2760.         if (dcdiff == 119 /* ESC index value */)

  2761.         {

  2762.             /* TODO: Optimize */

  2763.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2764.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2765.             else dcdiff = get_bits(gb, 8);

  2766.         }

  2767.         else

  2768.         {

  2769.             if (mquant == 1)

  2770.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2771.             else if (mquant == 2)

  2772.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2773.         }

  2774.         if (get_bits1(gb))

  2775.             dcdiff = -dcdiff;

  2776.     }

  2777. 

  2778.     /* Prediction */

  2779.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2780.     *dc_val = dcdiff;

  2781. 

  2782.     /* Store the quantized DC coeff, used for prediction */

  2783. 

  2784.     if (n < 4) {

  2785.         block[0] = dcdiff * s->y_dc_scale;

  2786.     } else {

  2787.         block[0] = dcdiff * s->c_dc_scale;

  2788.     }

  2789.     /* Skip ? */

  2790.     run_diff = 0;

  2791. 

  2792.     //AC Decoding

  2793.     i = 1;

  2794. 

  2795.     /* check if AC is needed at all and adjust direction if needed */

  2796.     if(!a_avail) dc_pred_dir = 1;

  2797.     if(!c_avail) dc_pred_dir = 0;

  2798.     if(!a_avail && !c_avail) use_pred = 0;

  2799.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2800.     ac_val2 = ac_val;

  2801. 

  2802.     scale = mquant * 2 + v->halfpq;

  2803. 

  2804.     if(dc_pred_dir) //left

  2805.         ac_val -= 16;

  2806.     else //top

  2807.         ac_val -= 16 * s->block_wrap[n];

  2808. 

  2809.     q1 = s->current_picture.qscale_table[mb_pos];

  2810.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2811.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2812.     if(dc_pred_dir && n==1) q2 = q1;

  2813.     if(!dc_pred_dir && n==2) q2 = q1;

  2814.     if(n==3) q2 = q1;

  2815. 

  2816.     if(coded) {

  2817.         int last = 0, skip, value;

  2818.         const int8_t *zz_table;

  2819.         int k;

  2820. 

  2821.         zz_table = wmv1_scantable[0];

  2822. 

  2823.         while (!last) {

  2824.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2825.             i += skip;

  2826.             if(i > 63)

  2827.                 break;

  2828.             block[zz_table[i++]] = value;

  2829.         }

  2830. 

  2831.         /* apply AC prediction if needed */

  2832.         if(use_pred) {

  2833.             /* scale predictors if needed*/

  2834.             if(q2 && q1!=q2) {

  2835.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2836.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2837. 

  2838.                 if(dc_pred_dir) { //left

  2839.                     for(k = 1; k < 8; k++)

  2840.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2841.                 } else { //top

  2842.                     for(k = 1; k < 8; k++)

  2843.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2844.                 }

  2845.             } else {

  2846.                 if(dc_pred_dir) { //left

  2847.                     for(k = 1; k < 8; k++)

  2848.                         block[k << 3] += ac_val[k];

  2849.                 } else { //top

  2850.                     for(k = 1; k < 8; k++)

  2851.                         block[k] += ac_val[k + 8];

  2852.                 }

  2853.             }

  2854.         }

  2855.         /* save AC coeffs for further prediction */

  2856.         for(k = 1; k < 8; k++) {

  2857.             ac_val2[k] = block[k << 3];

  2858.             ac_val2[k + 8] = block[k];

  2859.         }

  2860. 

  2861.         /* scale AC coeffs */

  2862.         for(k = 1; k < 64; k++)

  2863.             if(block[k]) {

  2864.                 block[k] *= scale;

  2865.                 if(!v->pquantizer)

  2866.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2867.             }

  2868. 

  2869.         if(use_pred) i = 63;

  2870.     } else { // no AC coeffs

  2871.         int k;

  2872. 

  2873.         memset(ac_val2, 0, 16 * 2);

  2874.         if(dc_pred_dir) {//left

  2875.             if(use_pred) {

  2876.                 memcpy(ac_val2, ac_val, 8 * 2);

  2877.                 if(q2 && q1!=q2) {

  2878.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2879.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2880.                     for(k = 1; k < 8; k++)

  2881.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2882.                 }

  2883.             }

  2884.         } else {//top

  2885.             if(use_pred) {

  2886.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2887.                 if(q2 && q1!=q2) {

  2888.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2889.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2890.                     for(k = 1; k < 8; k++)

  2891.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2892.                 }

  2893.             }

  2894.         }

  2895. 

  2896.         /* apply AC prediction if needed */

  2897.         if(use_pred) {

  2898.             if(dc_pred_dir) { //left

  2899.                 for(k = 1; k < 8; k++) {

  2900.                     block[k << 3] = ac_val2[k] * scale;

  2901.                     if(!v->pquantizer && block[k << 3])

  2902.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2903.                 }

  2904.             } else { //top

  2905.                 for(k = 1; k < 8; k++) {

  2906.                     block[k] = ac_val2[k + 8] * scale;

  2907.                     if(!v->pquantizer && block[k])

  2908.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2909.                 }

  2910.             }

  2911.             i = 63;

  2912.         }

  2913.     }

  2914.     s->block_last_index[n] = i;

  2915. 

  2916.     return 0;

  2917. }

  2918. 

  2919. /** Decode P block

  2920.  */

  2921. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,

  2922.                               uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left)

  2923. {

  2924.     MpegEncContext *s = &v->s;

  2925.     GetBitContext *gb = &s->gb;

  2926.     int i, j;

  2927.     int subblkpat = 0;

  2928.     int scale, off, idx, last, skip, value;

  2929.     int ttblk = ttmb & 7;

  2930.     int pat = 0;

  2931. 

  2932.     if(ttmb == -1) {

  2933.         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)];

  2934.     }

  2935.     if(ttblk == TT_4X4) {

  2936.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  2937.     }

  2938.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  2939.         subblkpat = decode012(gb);

  2940.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  2941.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  2942.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  2943.     }

  2944.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  2945. 

  2946.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  2947.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  2948.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  2949.         ttblk = TT_8X4;

  2950.     }

  2951.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  2952.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  2953.         ttblk = TT_4X8;

  2954.     }

  2955.     switch(ttblk) {

  2956.     case TT_8X8:

  2957.         pat = 0xF;

  2958.         i = 0;

  2959.         last = 0;

  2960.         while (!last) {

  2961.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2962.             i += skip;

  2963.             if(i > 63)

  2964.                 break;

  2965.             idx = wmv1_scantable[0][i++];

  2966.             block[idx] = value * scale;

  2967.             if(!v->pquantizer)

  2968.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  2969.         }

  2970.         if(!skip_block){

  2971.             s->dsp.vc1_inv_trans_8x8(block);

  2972.             s->dsp.add_pixels_clamped(block, dst, linesize);

  2973.             if(apply_filter && cbp_top  & 0xC)

  2974.                 s->dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  2975.             if(apply_filter && cbp_left & 0xA)

  2976.                 s->dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  2977.         }

  2978.         break;

  2979.     case TT_4X4:

  2980.         pat = ~subblkpat & 0xF;

  2981.         for(j = 0; j < 4; j++) {

  2982.             last = subblkpat & (1 << (3 - j));

  2983.             i = 0;

  2984.             off = (j & 1) * 4 + (j & 2) * 16;

  2985.             while (!last) {

  2986.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2987.                 i += skip;

  2988.                 if(i > 15)

  2989.                     break;

  2990.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  2991.                 block[idx + off] = value * scale;

  2992.                 if(!v->pquantizer)

  2993.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  2994.             }

  2995.             if(!(subblkpat & (1 << (3 - j))) && !skip_block){

  2996.                 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);

  2997.                 if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2)))))

  2998.                     s->dsp.vc1_v_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  2999.                 if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1)))))

  3000.                     s->dsp.vc1_h_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  3001.             }

  3002.         }

  3003.         break;

  3004.     case TT_8X4:

  3005.         pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF;

  3006.         for(j = 0; j < 2; j++) {

  3007.             last = subblkpat & (1 << (1 - j));

  3008.             i = 0;

  3009.             off = j * 32;

  3010.             while (!last) {

  3011.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3012.                 i += skip;

  3013.                 if(i > 31)

  3014.                     break;

  3015.                 idx = v->zz_8x4[i++]+off;

  3016.                 block[idx] = value * scale;

  3017.                 if(!v->pquantizer)

  3018.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3019.             }

  3020.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3021.                 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);

  3022.                 if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC))

  3023.                     s->dsp.vc1_v_loop_filter8(dst + j*4*linesize, linesize, v->pq);

  3024.                 if(apply_filter && cbp_left & (2 << j))

  3025.                     s->dsp.vc1_h_loop_filter4(dst + j*4*linesize, linesize, v->pq);

  3026.             }

  3027.         }

  3028.         break;

  3029.     case TT_4X8:

  3030.         pat = ~(subblkpat*5) & 0xF;

  3031.         for(j = 0; j < 2; j++) {

  3032.             last = subblkpat & (1 << (1 - j));

  3033.             i = 0;

  3034.             off = j * 4;

  3035.             while (!last) {

  3036.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3037.                 i += skip;

  3038.                 if(i > 31)

  3039.                     break;

  3040.                 idx = v->zz_4x8[i++]+off;

  3041.                 block[idx] = value * scale;

  3042.                 if(!v->pquantizer)

  3043.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3044.             }

  3045.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3046.                 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3047.                 if(apply_filter && cbp_top & (2 << j))

  3048.                     s->dsp.vc1_v_loop_filter4(dst + j*4, linesize, v->pq);

  3049.                 if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA))

  3050.                     s->dsp.vc1_h_loop_filter8(dst + j*4, linesize, v->pq);

  3051.             }

  3052.         }

  3053.         break;

  3054.     }

  3055.     return pat;

  3056. }

  3057. 

  3058. /** @} */ // Macroblock group

  3059. 

  3060. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3061. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3062. 

  3063. /** Decode one P-frame MB (in Simple/Main profile)

  3064.  */

  3065. static int vc1_decode_p_mb(VC1Context *v)

  3066. {

  3067.     MpegEncContext *s = &v->s;

  3068.     GetBitContext *gb = &s->gb;

  3069.     int i, j;

  3070.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3071.     int cbp; /* cbp decoding stuff */

  3072.     int mqdiff, mquant; /* MB quantization */

  3073.     int ttmb = v->ttfrm; /* MB Transform type */

  3074. 

  3075.     int mb_has_coeffs = 1; /* last_flag */

  3076.     int dmv_x, dmv_y; /* Differential MV components */

  3077.     int index, index1; /* LUT indexes */

  3078.     int val, sign; /* temp values */

  3079.     int first_block = 1;

  3080.     int dst_idx, off;

  3081.     int skipped, fourmv;

  3082.     int block_cbp = 0, pat;

  3083.     int apply_loop_filter;

  3084. 

  3085.     mquant = v->pq; /* Loosy initialization */

  3086. 

  3087.     if (v->mv_type_is_raw)

  3088.         fourmv = get_bits1(gb);

  3089.     else

  3090.         fourmv = v->mv_type_mb_plane[mb_pos];

  3091.     if (v->skip_is_raw)

  3092.         skipped = get_bits1(gb);

  3093.     else

  3094.         skipped = v->s.mbskip_table[mb_pos];

  3095. 

  3096.     s->dsp.clear_blocks(s->block[0]);

  3097. 

  3098.     apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  3099.     if (!fourmv) /* 1MV mode */

  3100.     {

  3101.         if (!skipped)

  3102.         {

  3103.             GET_MVDATA(dmv_x, dmv_y);

  3104. 

  3105.             if (s->mb_intra) {

  3106.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3107.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3108.             }

  3109.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3110.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3111. 

  3112.             /* FIXME Set DC val for inter block ? */

  3113.             if (s->mb_intra && !mb_has_coeffs)

  3114.             {

  3115.                 GET_MQUANT();

  3116.                 s->ac_pred = get_bits1(gb);

  3117.                 cbp = 0;

  3118.             }

  3119.             else if (mb_has_coeffs)

  3120.             {

  3121.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3122.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3123.                 GET_MQUANT();

  3124.             }

  3125.             else

  3126.             {

  3127.                 mquant = v->pq;

  3128.                 cbp = 0;

  3129.             }

  3130.             s->current_picture.qscale_table[mb_pos] = mquant;

  3131. 

  3132.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3133.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3134.                                 VC1_TTMB_VLC_BITS, 2);

  3135.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3136.             dst_idx = 0;

  3137.             for (i=0; i<6; i++)

  3138.             {

  3139.                 s->dc_val[0][s->block_index[i]] = 0;

  3140.                 dst_idx += i >> 2;

  3141.                 val = ((cbp >> (5 - i)) & 1);

  3142.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3143.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3144.                 if(s->mb_intra) {

  3145.                     /* check if prediction blocks A and C are available */

  3146.                     v->a_avail = v->c_avail = 0;

  3147.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3148.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3149.                     if(i == 1 || i == 3 || s->mb_x)

  3150.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3151. 

  3152.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3153.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3154.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3155.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3156.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3157.                     if(v->pq >= 9 && v->overlap) {

  3158.                         if(v->c_avail)

  3159.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3160.                         if(v->a_avail)

  3161.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3162.                     }

  3163.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3164.                         int left_cbp, top_cbp;

  3165.                         if(i & 4){

  3166.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3167.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3168.                         }else{

  3169.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3170.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3171.                         }

  3172.                         if(left_cbp & 0xC)

  3173.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3174.                         if(top_cbp  & 0xA)

  3175.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3176.                     }

  3177.                     block_cbp |= 0xF << (i << 2);

  3178.                 } else if(val) {

  3179.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3180.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3181.                         filter = 1;

  3182.                         if(i & 4){

  3183.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3184.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3185.                         }else{

  3186.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3187.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3188.                         }

  3189.                         if(left_cbp & 0xC)

  3190.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3191.                         if(top_cbp  & 0xA)

  3192.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3193.                     }

  3194.                     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);

  3195.                     block_cbp |= pat << (i << 2);

  3196.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3197.                     first_block = 0;

  3198.                 }

  3199.             }

  3200.         }

  3201.         else //Skipped

  3202.         {

  3203.             s->mb_intra = 0;

  3204.             for(i = 0; i < 6; i++) {

  3205.                 v->mb_type[0][s->block_index[i]] = 0;

  3206.                 s->dc_val[0][s->block_index[i]] = 0;

  3207.             }

  3208.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3209.             s->current_picture.qscale_table[mb_pos] = 0;

  3210.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3211.             vc1_mc_1mv(v, 0);

  3212.             return 0;

  3213.         }

  3214.     } //1MV mode

  3215.     else //4MV mode

  3216.     {

  3217.         if (!skipped /* unskipped MB */)

  3218.         {

  3219.             int intra_count = 0, coded_inter = 0;

  3220.             int is_intra[6], is_coded[6];

  3221.             /* Get CBPCY */

  3222.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3223.             for (i=0; i<6; i++)

  3224.             {

  3225.                 val = ((cbp >> (5 - i)) & 1);

  3226.                 s->dc_val[0][s->block_index[i]] = 0;

  3227.                 s->mb_intra = 0;

  3228.                 if(i < 4) {

  3229.                     dmv_x = dmv_y = 0;

  3230.                     s->mb_intra = 0;

  3231.                     mb_has_coeffs = 0;

  3232.                     if(val) {

  3233.                         GET_MVDATA(dmv_x, dmv_y);

  3234.                     }

  3235.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3236.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3237.                     intra_count += s->mb_intra;

  3238.                     is_intra[i] = s->mb_intra;

  3239.                     is_coded[i] = mb_has_coeffs;

  3240.                 }

  3241.                 if(i&4){

  3242.                     is_intra[i] = (intra_count >= 3);

  3243.                     is_coded[i] = val;

  3244.                 }

  3245.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3246.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3247.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3248.             }

  3249.             // if there are no coded blocks then don't do anything more

  3250.             if(!intra_count && !coded_inter) return 0;

  3251.             dst_idx = 0;

  3252.             GET_MQUANT();

  3253.             s->current_picture.qscale_table[mb_pos] = mquant;

  3254.             /* test if block is intra and has pred */

  3255.             {

  3256.                 int intrapred = 0;

  3257.                 for(i=0; i<6; i++)

  3258.                     if(is_intra[i]) {

  3259.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3260.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3261.                             intrapred = 1;

  3262.                             break;

  3263.                         }

  3264.                     }

  3265.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3266.                 else s->ac_pred = 0;

  3267.             }

  3268.             if (!v->ttmbf && coded_inter)

  3269.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3270.             for (i=0; i<6; i++)

  3271.             {

  3272.                 dst_idx += i >> 2;

  3273.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3274.                 s->mb_intra = is_intra[i];

  3275.                 if (is_intra[i]) {

  3276.                     /* check if prediction blocks A and C are available */

  3277.                     v->a_avail = v->c_avail = 0;

  3278.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3279.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3280.                     if(i == 1 || i == 3 || s->mb_x)

  3281.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3282. 

  3283.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3284.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3285.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3286.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3287.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3288.                     if(v->pq >= 9 && v->overlap) {

  3289.                         if(v->c_avail)

  3290.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3291.                         if(v->a_avail)

  3292.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3293.                     }

  3294.                     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)){

  3295.                         int left_cbp, top_cbp;

  3296.                         if(i & 4){

  3297.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3298.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3299.                         }else{

  3300.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3301.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3302.                         }

  3303.                         if(left_cbp & 0xC)

  3304.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3305.                         if(top_cbp  & 0xA)

  3306.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3307.                     }

  3308.                     block_cbp |= 0xF << (i << 2);

  3309.                 } else if(is_coded[i]) {

  3310.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3311.                     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)){

  3312.                         filter = 1;

  3313.                         if(i & 4){

  3314.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3315.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3316.                         }else{

  3317.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3318.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3319.                         }

  3320.                         if(left_cbp & 0xC)

  3321.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3322.                         if(top_cbp  & 0xA)

  3323.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3324.                     }

  3325.                     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);

  3326.                     block_cbp |= pat << (i << 2);

  3327.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3328.                     first_block = 0;

  3329.                 }

  3330.             }

  3331.             return 0;

  3332.         }

  3333.         else //Skipped MB

  3334.         {

  3335.             s->mb_intra = 0;

  3336.             s->current_picture.qscale_table[mb_pos] = 0;

  3337.             for (i=0; i<6; i++) {

  3338.                 v->mb_type[0][s->block_index[i]] = 0;

  3339.                 s->dc_val[0][s->block_index[i]] = 0;

  3340.             }

  3341.             for (i=0; i<4; i++)

  3342.             {

  3343.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3344.                 vc1_mc_4mv_luma(v, i);

  3345.             }

  3346.             vc1_mc_4mv_chroma(v);

  3347.             s->current_picture.qscale_table[mb_pos] = 0;

  3348.             return 0;

  3349.         }

  3350.     }

  3351.     v->cbp[s->mb_x] = block_cbp;

  3352. 

  3353.     /* Should never happen */

  3354.     return -1;

  3355. }

  3356. 

  3357. /** Decode one B-frame MB (in Main profile)

  3358.  */

  3359. static void vc1_decode_b_mb(VC1Context *v)

  3360. {

  3361.     MpegEncContext *s = &v->s;

  3362.     GetBitContext *gb = &s->gb;

  3363.     int i, j;

  3364.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3365.     int cbp = 0; /* cbp decoding stuff */

  3366.     int mqdiff, mquant; /* MB quantization */

  3367.     int ttmb = v->ttfrm; /* MB Transform type */

  3368.     int mb_has_coeffs = 0; /* last_flag */

  3369.     int index, index1; /* LUT indexes */

  3370.     int val, sign; /* temp values */

  3371.     int first_block = 1;

  3372.     int dst_idx, off;

  3373.     int skipped, direct;

  3374.     int dmv_x[2], dmv_y[2];

  3375.     int bmvtype = BMV_TYPE_BACKWARD;

  3376. 

  3377.     mquant = v->pq; /* Loosy initialization */

  3378.     s->mb_intra = 0;

  3379. 

  3380.     if (v->dmb_is_raw)

  3381.         direct = get_bits1(gb);

  3382.     else

  3383.         direct = v->direct_mb_plane[mb_pos];

  3384.     if (v->skip_is_raw)

  3385.         skipped = get_bits1(gb);

  3386.     else

  3387.         skipped = v->s.mbskip_table[mb_pos];

  3388. 

  3389.     s->dsp.clear_blocks(s->block[0]);

  3390.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3391.     for(i = 0; i < 6; i++) {

  3392.         v->mb_type[0][s->block_index[i]] = 0;

  3393.         s->dc_val[0][s->block_index[i]] = 0;

  3394.     }

  3395.     s->current_picture.qscale_table[mb_pos] = 0;

  3396. 

  3397.     if (!direct) {

  3398.         if (!skipped) {

  3399.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3400.             dmv_x[1] = dmv_x[0];

  3401.             dmv_y[1] = dmv_y[0];

  3402.         }

  3403.         if(skipped || !s->mb_intra) {

  3404.             bmvtype = decode012(gb);

  3405.             switch(bmvtype) {

  3406.             case 0:

  3407.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3408.                 break;

  3409.             case 1:

  3410.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3411.                 break;

  3412.             case 2:

  3413.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3414.                 dmv_x[0] = dmv_y[0] = 0;

  3415.             }

  3416.         }

  3417.     }

  3418.     for(i = 0; i < 6; i++)

  3419.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3420. 

  3421.     if (skipped) {

  3422.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3423.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3424.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3425.         return;

  3426.     }

  3427.     if (direct) {

  3428.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3429.         GET_MQUANT();

  3430.         s->mb_intra = 0;

  3431.         s->current_picture.qscale_table[mb_pos] = mquant;

  3432.         if(!v->ttmbf)

  3433.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3434.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3435.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3436.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3437.     } else {

  3438.         if(!mb_has_coeffs && !s->mb_intra) {

  3439.             /* no coded blocks - effectively skipped */

  3440.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3441.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3442.             return;

  3443.         }

  3444.         if(s->mb_intra && !mb_has_coeffs) {

  3445.             GET_MQUANT();

  3446.             s->current_picture.qscale_table[mb_pos] = mquant;

  3447.             s->ac_pred = get_bits1(gb);

  3448.             cbp = 0;

  3449.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3450.         } else {

  3451.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3452.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3453.                 if(!mb_has_coeffs) {

  3454.                     /* interpolated skipped block */

  3455.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3456.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3457.                     return;

  3458.                 }

  3459.             }

  3460.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3461.             if(!s->mb_intra) {

  3462.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3463.             }

  3464.             if(s->mb_intra)

  3465.                 s->ac_pred = get_bits1(gb);

  3466.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3467.             GET_MQUANT();

  3468.             s->current_picture.qscale_table[mb_pos] = mquant;

  3469.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3470.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3471.         }

  3472.     }

  3473.     dst_idx = 0;

  3474.     for (i=0; i<6; i++)

  3475.     {

  3476.         s->dc_val[0][s->block_index[i]] = 0;

  3477.         dst_idx += i >> 2;

  3478.         val = ((cbp >> (5 - i)) & 1);

  3479.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3480.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3481.         if(s->mb_intra) {

  3482.             /* check if prediction blocks A and C are available */

  3483.             v->a_avail = v->c_avail = 0;

  3484.             if(i == 2 || i == 3 || !s->first_slice_line)

  3485.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3486.             if(i == 1 || i == 3 || s->mb_x)

  3487.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3488. 

  3489.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3490.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3491.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3492.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3493.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3494.         } else if(val) {

  3495.             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);

  3496.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3497.             first_block = 0;

  3498.         }

  3499.     }

  3500. }

  3501. 

  3502. /** Decode blocks of I-frame

  3503.  */

  3504. static void vc1_decode_i_blocks(VC1Context *v)

  3505. {

  3506.     int k, j;

  3507.     MpegEncContext *s = &v->s;

  3508.     int cbp, val;

  3509.     uint8_t *coded_val;

  3510.     int mb_pos;

  3511. 

  3512.     /* select codingmode used for VLC tables selection */

  3513.     switch(v->y_ac_table_index){

  3514.     case 0:

  3515.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3516.         break;

  3517.     case 1:

  3518.         v->codingset = CS_HIGH_MOT_INTRA;

  3519.         break;

  3520.     case 2:

  3521.         v->codingset = CS_MID_RATE_INTRA;

  3522.         break;

  3523.     }

  3524. 

  3525.     switch(v->c_ac_table_index){

  3526.     case 0:

  3527.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3528.         break;

  3529.     case 1:

  3530.         v->codingset2 = CS_HIGH_MOT_INTER;

  3531.         break;

  3532.     case 2:

  3533.         v->codingset2 = CS_MID_RATE_INTER;

  3534.         break;

  3535.     }

  3536. 

  3537.     /* Set DC scale - y and c use the same */

  3538.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3539.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3540. 

  3541.     //do frame decode

  3542.     s->mb_x = s->mb_y = 0;

  3543.     s->mb_intra = 1;

  3544.     s->first_slice_line = 1;

  3545.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3546.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3547.             ff_init_block_index(s);

  3548.             ff_update_block_index(s);

  3549.             s->dsp.clear_blocks(s->block[0]);

  3550.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3551.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3552.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3553.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3554.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3555. 

  3556.             // do actual MB decoding and displaying

  3557.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3558.             v->s.ac_pred = get_bits1(&v->s.gb);

  3559. 

  3560.             for(k = 0; k < 6; k++) {

  3561.                 val = ((cbp >> (5 - k)) & 1);

  3562. 

  3563.                 if (k < 4) {

  3564.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3565.                     val = val ^ pred;

  3566.                     *coded_val = val;

  3567.                 }

  3568.                 cbp |= val << (5 - k);

  3569. 

  3570.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3571. 

  3572.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3573.                 if(v->pq >= 9 && v->overlap) {

  3574.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3575.                 }

  3576.             }

  3577. 

  3578.             vc1_put_block(v, s->block);

  3579.             if(v->pq >= 9 && v->overlap) {

  3580.                 if(s->mb_x) {

  3581.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3582.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3583.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3584.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3585.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3586.                     }

  3587.                 }

  3588.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3589.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3590.                 if(!s->first_slice_line) {

  3591.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3592.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3593.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3594.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3595.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3596.                     }

  3597.                 }

  3598.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3599.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3600.             }

  3601.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3602. 

  3603.             if(get_bits_count(&s->gb) > v->bits) {

  3604.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3605.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3606.                 return;

  3607.             }

  3608.         }

  3609.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3610.         s->first_slice_line = 0;

  3611.     }

  3612.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3613. }

  3614. 

  3615. /** Decode blocks of I-frame for advanced profile

  3616.  */

  3617. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3618. {

  3619.     int k, j;

  3620.     MpegEncContext *s = &v->s;

  3621.     int cbp, val;

  3622.     uint8_t *coded_val;

  3623.     int mb_pos;

  3624.     int mquant = v->pq;

  3625.     int mqdiff;

  3626.     int overlap;

  3627.     GetBitContext *gb = &s->gb;

  3628. 

  3629.     /* select codingmode used for VLC tables selection */

  3630.     switch(v->y_ac_table_index){

  3631.     case 0:

  3632.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3633.         break;

  3634.     case 1:

  3635.         v->codingset = CS_HIGH_MOT_INTRA;

  3636.         break;

  3637.     case 2:

  3638.         v->codingset = CS_MID_RATE_INTRA;

  3639.         break;

  3640.     }

  3641. 

  3642.     switch(v->c_ac_table_index){

  3643.     case 0:

  3644.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3645.         break;

  3646.     case 1:

  3647.         v->codingset2 = CS_HIGH_MOT_INTER;

  3648.         break;

  3649.     case 2:

  3650.         v->codingset2 = CS_MID_RATE_INTER;

  3651.         break;

  3652.     }

  3653. 

  3654.     //do frame decode

  3655.     s->mb_x = s->mb_y = 0;

  3656.     s->mb_intra = 1;

  3657.     s->first_slice_line = 1;

  3658.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3659.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3660.             ff_init_block_index(s);

  3661.             ff_update_block_index(s);

  3662.             s->dsp.clear_blocks(s->block[0]);

  3663.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3664.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3665.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3666.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3667. 

  3668.             // do actual MB decoding and displaying

  3669.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3670.             if(v->acpred_is_raw)

  3671.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3672.             else

  3673.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3674. 

  3675.             if(v->condover == CONDOVER_SELECT) {

  3676.                 if(v->overflg_is_raw)

  3677.                     overlap = get_bits1(&v->s.gb);

  3678.                 else

  3679.                     overlap = v->over_flags_plane[mb_pos];

  3680.             } else

  3681.                 overlap = (v->condover == CONDOVER_ALL);

  3682. 

  3683.             GET_MQUANT();

  3684. 

  3685.             s->current_picture.qscale_table[mb_pos] = mquant;

  3686.             /* Set DC scale - y and c use the same */

  3687.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3688.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3689. 

  3690.             for(k = 0; k < 6; k++) {

  3691.                 val = ((cbp >> (5 - k)) & 1);

  3692. 

  3693.                 if (k < 4) {

  3694.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3695.                     val = val ^ pred;

  3696.                     *coded_val = val;

  3697.                 }

  3698.                 cbp |= val << (5 - k);

  3699. 

  3700.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3701.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3702. 

  3703.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3704. 

  3705.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3706.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3707.             }

  3708. 

  3709.             vc1_put_block(v, s->block);

  3710.             if(overlap) {

  3711.                 if(s->mb_x) {

  3712.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3713.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3714.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3715.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3716.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3717.                     }

  3718.                 }

  3719.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3720.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3721.                 if(!s->first_slice_line) {

  3722.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3723.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3724.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3725.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3726.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3727.                     }

  3728.                 }

  3729.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3730.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3731.             }

  3732.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3733. 

  3734.             if(get_bits_count(&s->gb) > v->bits) {

  3735.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3736.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3737.                 return;

  3738.             }

  3739.         }

  3740.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3741.         s->first_slice_line = 0;

  3742.     }

  3743.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3744. }

  3745. 

  3746. static void vc1_decode_p_blocks(VC1Context *v)

  3747. {

  3748.     MpegEncContext *s = &v->s;

  3749. 

  3750.     /* select codingmode used for VLC tables selection */

  3751.     switch(v->c_ac_table_index){

  3752.     case 0:

  3753.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3754.         break;

  3755.     case 1:

  3756.         v->codingset = CS_HIGH_MOT_INTRA;

  3757.         break;

  3758.     case 2:

  3759.         v->codingset = CS_MID_RATE_INTRA;

  3760.         break;

  3761.     }

  3762. 

  3763.     switch(v->c_ac_table_index){

  3764.     case 0:

  3765.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3766.         break;

  3767.     case 1:

  3768.         v->codingset2 = CS_HIGH_MOT_INTER;

  3769.         break;

  3770.     case 2:

  3771.         v->codingset2 = CS_MID_RATE_INTER;

  3772.         break;

  3773.     }

  3774. 

  3775.     s->first_slice_line = 1;

  3776.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  3777.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3778.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3779.             ff_init_block_index(s);

  3780.             ff_update_block_index(s);

  3781.             s->dsp.clear_blocks(s->block[0]);

  3782. 

  3783.             vc1_decode_p_mb(v);

  3784.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3785.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3786.                 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);

  3787.                 return;

  3788.             }

  3789.         }

  3790.         memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride);

  3791.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3792.         s->first_slice_line = 0;

  3793.     }

  3794.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3795. }

  3796. 

  3797. static void vc1_decode_b_blocks(VC1Context *v)

  3798. {

  3799.     MpegEncContext *s = &v->s;

  3800. 

  3801.     /* select codingmode used for VLC tables selection */

  3802.     switch(v->c_ac_table_index){

  3803.     case 0:

  3804.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3805.         break;

  3806.     case 1:

  3807.         v->codingset = CS_HIGH_MOT_INTRA;

  3808.         break;

  3809.     case 2:

  3810.         v->codingset = CS_MID_RATE_INTRA;

  3811.         break;

  3812.     }

  3813. 

  3814.     switch(v->c_ac_table_index){

  3815.     case 0:

  3816.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3817.         break;

  3818.     case 1:

  3819.         v->codingset2 = CS_HIGH_MOT_INTER;

  3820.         break;

  3821.     case 2:

  3822.         v->codingset2 = CS_MID_RATE_INTER;

  3823.         break;

  3824.     }

  3825. 

  3826.     s->first_slice_line = 1;

  3827.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3828.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3829.             ff_init_block_index(s);

  3830.             ff_update_block_index(s);

  3831.             s->dsp.clear_blocks(s->block[0]);

  3832. 

  3833.             vc1_decode_b_mb(v);

  3834.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3835.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3836.                 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);

  3837.                 return;

  3838.             }

  3839.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3840.         }

  3841.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3842.         s->first_slice_line = 0;

  3843.     }

  3844.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3845. }

  3846. 

  3847. static void vc1_decode_skip_blocks(VC1Context *v)

  3848. {

  3849.     MpegEncContext *s = &v->s;

  3850. 

  3851.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3852.     s->first_slice_line = 1;

  3853.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3854.         s->mb_x = 0;

  3855.         ff_init_block_index(s);

  3856.         ff_update_block_index(s);

  3857.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3858.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3859.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3860.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3861.         s->first_slice_line = 0;

  3862.     }

  3863.     s->pict_type = FF_P_TYPE;

  3864. }

  3865. 

  3866. static void vc1_decode_blocks(VC1Context *v)

  3867. {

  3868. 

  3869.     v->s.esc3_level_length = 0;

  3870.     if(v->x8_type){

  3871.         ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );

  3872.     }else{

  3873. 

  3874.         switch(v->s.pict_type) {

  3875.         case FF_I_TYPE:

  3876.             if(v->profile == PROFILE_ADVANCED)

  3877.                 vc1_decode_i_blocks_adv(v);

  3878.             else

  3879.                 vc1_decode_i_blocks(v);

  3880.             break;

  3881.         case FF_P_TYPE:

  3882.             if(v->p_frame_skipped)

  3883.                 vc1_decode_skip_blocks(v);

  3884.             else

  3885.                 vc1_decode_p_blocks(v);

  3886.             break;

  3887.         case FF_B_TYPE:

  3888.             if(v->bi_type){

  3889.                 if(v->profile == PROFILE_ADVANCED)

  3890.                     vc1_decode_i_blocks_adv(v);

  3891.                 else

  3892.                     vc1_decode_i_blocks(v);

  3893.             }else

  3894.                 vc1_decode_b_blocks(v);

  3895.             break;

  3896.         }

  3897.     }

  3898. }

  3899. 

  3900. /** Find VC-1 marker in buffer

  3901.  * @return position where next marker starts or end of buffer if no marker found

  3902.  */

  3903. static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)

  3904. {

  3905.     uint32_t mrk = 0xFFFFFFFF;

  3906. 

  3907.     if(end-src < 4) return end;

  3908.     while(src < end){

  3909.         mrk = (mrk << 8) | *src++;

  3910.         if(IS_MARKER(mrk))

  3911.             return src-4;

  3912.     }

  3913.     return end;

  3914. }

  3915. 

  3916. static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)

  3917. {

  3918.     int dsize = 0, i;

  3919. 

  3920.     if(size < 4){

  3921.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  3922.         return size;

  3923.     }

  3924.     for(i = 0; i < size; i++, src++) {

  3925.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  3926.             dst[dsize++] = src[1];

  3927.             src++;

  3928.             i++;

  3929.         } else

  3930.             dst[dsize++] = *src;

  3931.     }

  3932.     return dsize;

  3933. }

  3934. 

  3935. /** Initialize a VC1/WMV3 decoder

  3936.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3937.  * @todo TODO: Decypher remaining bits in extra_data

  3938.  */

  3939. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  3940. {

  3941.     VC1Context *v = avctx->priv_data;

  3942.     MpegEncContext *s = &v->s;

  3943.     GetBitContext gb;

  3944. 

  3945.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  3946.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  3947.         avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);

  3948.     else

  3949.         avctx->pix_fmt = PIX_FMT_GRAY8;

  3950.     avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);

  3951.     v->s.avctx = avctx;

  3952.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  3953.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  3954. 

  3955.     if(avctx->idct_algo==FF_IDCT_AUTO){

  3956.         avctx->idct_algo=FF_IDCT_WMV2;

  3957.     }

  3958. 

  3959.     if(ff_h263_decode_init(avctx) < 0)

  3960.         return -1;

  3961.     if (vc1_init_common(v) < 0) return -1;

  3962. 

  3963.     avctx->coded_width = avctx->width;

  3964.     avctx->coded_height = avctx->height;

  3965.     if (avctx->codec_id == CODEC_ID_WMV3)

  3966.     {

  3967.         int count = 0;

  3968. 

  3969.         // looks like WMV3 has a sequence header stored in the extradata

  3970.         // advanced sequence header may be before the first frame

  3971.         // the last byte of the extradata is a version number, 1 for the

  3972.         // samples we can decode

  3973. 

  3974.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  3975. 

  3976.         if (decode_sequence_header(avctx, &gb) < 0)

  3977.           return -1;

  3978. 

  3979.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  3980.         if (count>0)

  3981.         {

  3982.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  3983.                    count, get_bits(&gb, count));

  3984.         }

  3985.         else if (count < 0)

  3986.         {

  3987.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  3988.         }

  3989.     } else { // VC1/WVC1

  3990.         const uint8_t *start = avctx->extradata;

  3991.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  3992.         const uint8_t *next;

  3993.         int size, buf2_size;

  3994.         uint8_t *buf2 = NULL;

  3995.         int seq_initialized = 0, ep_initialized = 0;

  3996. 

  3997.         if(avctx->extradata_size < 16) {

  3998.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  3999.             return -1;

  4000.         }

  4001. 

  4002.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4003.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  4004.         next = start;

  4005.         for(; next < end; start = next){

  4006.             next = find_next_marker(start + 4, end);

  4007.             size = next - start - 4;

  4008.             if(size <= 0) continue;

  4009.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  4010.             init_get_bits(&gb, buf2, buf2_size * 8);

  4011.             switch(AV_RB32(start)){

  4012.             case VC1_CODE_SEQHDR:

  4013.                 if(decode_sequence_header(avctx, &gb) < 0){

  4014.                     av_free(buf2);

  4015.                     return -1;

  4016.                 }

  4017.                 seq_initialized = 1;

  4018.                 break;

  4019.             case VC1_CODE_ENTRYPOINT:

  4020.                 if(decode_entry_point(avctx, &gb) < 0){

  4021.                     av_free(buf2);

  4022.                     return -1;

  4023.                 }

  4024.                 ep_initialized = 1;

  4025.                 break;

  4026.             }

  4027.         }

  4028.         av_free(buf2);

  4029.         if(!seq_initialized || !ep_initialized){

  4030.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4031.             return -1;

  4032.         }

  4033.     }

  4034.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4035.     s->low_delay = !avctx->has_b_frames;

  4036. 

  4037.     s->mb_width = (avctx->coded_width+15)>>4;

  4038.     s->mb_height = (avctx->coded_height+15)>>4;

  4039. 

  4040.     /* Allocate mb bitplanes */

  4041.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4042.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4043.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4044.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4045. 

  4046.     v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  4047.     v->cbp = v->cbp_base + s->mb_stride;

  4048. 

  4049.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4050.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4051.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4052.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4053.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4054. 

  4055.     /* Init coded blocks info */

  4056.     if (v->profile == PROFILE_ADVANCED)

  4057.     {

  4058. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4059. //            return -1;

  4060. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4061. //            return -1;

  4062.     }

  4063. 

  4064.     ff_intrax8_common_init(&v->x8,s);

  4065.     return 0;

  4066. }

  4067. 

  4068. 

  4069. /** Decode a VC1/WMV3 frame

  4070.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4071.  */

  4072. static int vc1_decode_frame(AVCodecContext *avctx,

  4073.                             void *data, int *data_size,

  4074.                             AVPacket *avpkt)

  4075. {

  4076.     const uint8_t *buf = avpkt->data;

  4077.     int buf_size = avpkt->size;

  4078.     VC1Context *v = avctx->priv_data;

  4079.     MpegEncContext *s = &v->s;

  4080.     AVFrame *pict = data;

  4081.     uint8_t *buf2 = NULL;

  4082.     const uint8_t *buf_start = buf;

  4083. 

  4084.     /* no supplementary picture */

  4085.     if (buf_size == 0) {

  4086.         /* special case for last picture */

  4087.         if (s->low_delay==0 && s->next_picture_ptr) {

  4088.             *pict= *(AVFrame*)s->next_picture_ptr;

  4089.             s->next_picture_ptr= NULL;

  4090. 

  4091.             *data_size = sizeof(AVFrame);

  4092.         }

  4093. 

  4094.         return 0;

  4095.     }

  4096. 

  4097.     /* We need to set current_picture_ptr before reading the header,

  4098.      * otherwise we cannot store anything in there. */

  4099.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4100.         int i= ff_find_unused_picture(s, 0);

  4101.         s->current_picture_ptr= &s->picture[i];

  4102.     }

  4103. 

  4104.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){

  4105.         if (v->profile < PROFILE_ADVANCED)

  4106.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  4107.         else

  4108.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  4109.     }

  4110. 

  4111.     //for advanced profile we may need to parse and unescape data

  4112.     if (avctx->codec_id == CODEC_ID_VC1) {

  4113.         int buf_size2 = 0;

  4114.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4115. 

  4116.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4117.             const uint8_t *start, *end, *next;

  4118.             int size;

  4119. 

  4120.             next = buf;

  4121.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4122.                 next = find_next_marker(start + 4, end);

  4123.                 size = next - start - 4;

  4124.                 if(size <= 0) continue;

  4125.                 switch(AV_RB32(start)){

  4126.                 case VC1_CODE_FRAME:

  4127.                     if (avctx->hwaccel ||

  4128.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4129.                         buf_start = start;

  4130.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4131.                     break;

  4132.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4133.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4134.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4135.                     decode_entry_point(avctx, &s->gb);

  4136.                     break;

  4137.                 case VC1_CODE_SLICE:

  4138.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4139.                     av_free(buf2);

  4140.                     return -1;

  4141.                 }

  4142.             }

  4143.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4144.             const uint8_t *divider;

  4145. 

  4146.             divider = find_next_marker(buf, buf + buf_size);

  4147.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4148.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4149.                 av_free(buf2);

  4150.                 return -1;

  4151.             }

  4152. 

  4153.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4154.             // TODO

  4155.             av_free(buf2);return -1;

  4156.         }else{

  4157.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4158.         }

  4159.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4160.     } else

  4161.         init_get_bits(&s->gb, buf, buf_size*8);

  4162.     // do parse frame header

  4163.     if(v->profile < PROFILE_ADVANCED) {

  4164.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4165.             av_free(buf2);

  4166.             return -1;

  4167.         }

  4168.     } else {

  4169.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4170.             av_free(buf2);

  4171.             return -1;

  4172.         }

  4173.     }

  4174. 

  4175.     if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){

  4176.         av_free(buf2);

  4177.         return -1;

  4178.     }

  4179. 

  4180.     // for hurry_up==5

  4181.     s->current_picture.pict_type= s->pict_type;

  4182.     s->current_picture.key_frame= s->pict_type == FF_I_TYPE;

  4183. 

  4184.     /* skip B-frames if we don't have reference frames */

  4185.     if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){

  4186.         av_free(buf2);

  4187.         return -1;//buf_size;

  4188.     }

  4189.     /* skip b frames if we are in a hurry */

  4190.     if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;

  4191.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)

  4192.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)

  4193.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4194.         av_free(buf2);

  4195.         return buf_size;

  4196.     }

  4197.     /* skip everything if we are in a hurry>=5 */

  4198.     if(avctx->hurry_up>=5) {

  4199.         av_free(buf2);

  4200.         return -1;//buf_size;

  4201.     }

  4202. 

  4203.     if(s->next_p_frame_damaged){

  4204.         if(s->pict_type==FF_B_TYPE)

  4205.             return buf_size;

  4206.         else

  4207.             s->next_p_frame_damaged=0;

  4208.     }

  4209. 

  4210.     if(MPV_frame_start(s, avctx) < 0) {

  4211.         av_free(buf2);

  4212.         return -1;

  4213.     }

  4214. 

  4215.     s->me.qpel_put= s->dsp.put_qpel_pixels_tab;

  4216.     s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;

  4217. 

  4218.     if ((CONFIG_VC1_VDPAU_DECODER || CONFIG_WMV3_VDPAU_DECODER)

  4219.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4220.         ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  4221.     else if (avctx->hwaccel) {

  4222.         if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)

  4223.             return -1;

  4224.         if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  4225.             return -1;

  4226.         if (avctx->hwaccel->end_frame(avctx) < 0)

  4227.             return -1;

  4228.     } else {

  4229.         ff_er_frame_start(s);

  4230. 

  4231.         v->bits = buf_size * 8;

  4232.         vc1_decode_blocks(v);

  4233. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4234. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4235. //      return -1;

  4236.         ff_er_frame_end(s);

  4237.     }

  4238. 

  4239.     MPV_frame_end(s);

  4240. 

  4241. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4242. assert(s->current_picture.pict_type == s->pict_type);

  4243.     if (s->pict_type == FF_B_TYPE || s->low_delay) {

  4244.         *pict= *(AVFrame*)s->current_picture_ptr;

  4245.     } else if (s->last_picture_ptr != NULL) {

  4246.         *pict= *(AVFrame*)s->last_picture_ptr;

  4247.     }

  4248. 

  4249.     if(s->last_picture_ptr || s->low_delay){

  4250.         *data_size = sizeof(AVFrame);

  4251.         ff_print_debug_info(s, pict);

  4252.     }

  4253. 

  4254.     /* Return the Picture timestamp as the frame number */

  4255.     /* we subtract 1 because it is added on utils.c     */

  4256.     avctx->frame_number = s->picture_number - 1;

  4257. 

  4258.     av_free(buf2);

  4259.     return buf_size;

  4260. }

  4261. 

  4262. 

  4263. /** Close a VC1/WMV3 decoder

  4264.  * @warning Initial try at using MpegEncContext stuff

  4265.  */

  4266. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  4267. {

  4268.     VC1Context *v = avctx->priv_data;

  4269. 

  4270.     av_freep(&v->hrd_rate);

  4271.     av_freep(&v->hrd_buffer);

  4272.     MPV_common_end(&v->s);

  4273.     av_freep(&v->mv_type_mb_plane);

  4274.     av_freep(&v->direct_mb_plane);

  4275.     av_freep(&v->acpred_plane);

  4276.     av_freep(&v->over_flags_plane);

  4277.     av_freep(&v->mb_type_base);

  4278.     av_freep(&v->cbp_base);

  4279.     ff_intrax8_common_end(&v->x8);

  4280.     return 0;

  4281. }

  4282. 

  4283. 

  4284. AVCodec vc1_decoder = {

  4285.     "vc1",

  4286.     CODEC_TYPE_VIDEO,

  4287.     CODEC_ID_VC1,

  4288.     sizeof(VC1Context),

  4289.     vc1_decode_init,

  4290.     NULL,

  4291.     vc1_decode_end,

  4292.     vc1_decode_frame,

  4293.     CODEC_CAP_DELAY,

  4294.     NULL,

  4295.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  4296.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4297. };

  4298. 

  4299. AVCodec wmv3_decoder = {

  4300.     "wmv3",

  4301.     CODEC_TYPE_VIDEO,

  4302.     CODEC_ID_WMV3,

  4303.     sizeof(VC1Context),

  4304.     vc1_decode_init,

  4305.     NULL,

  4306.     vc1_decode_end,

  4307.     vc1_decode_frame,

  4308.     CODEC_CAP_DELAY,

  4309.     NULL,

  4310.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  4311.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4312. };

  4313. 

  4314. #if CONFIG_WMV3_VDPAU_DECODER

  4315. AVCodec wmv3_vdpau_decoder = {

  4316.     "wmv3_vdpau",

  4317.     CODEC_TYPE_VIDEO,

  4318.     CODEC_ID_WMV3,

  4319.     sizeof(VC1Context),

  4320.     vc1_decode_init,

  4321.     NULL,

  4322.     vc1_decode_end,

  4323.     vc1_decode_frame,

  4324.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4325.     NULL,

  4326.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  4327.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_WMV3, PIX_FMT_NONE}

  4328. };

  4329. #endif

  4330. 

  4331. #if CONFIG_VC1_VDPAU_DECODER

  4332. AVCodec vc1_vdpau_decoder = {

  4333.     "vc1_vdpau",

  4334.     CODEC_TYPE_VIDEO,

  4335.     CODEC_ID_VC1,

  4336.     sizeof(VC1Context),

  4337.     vc1_decode_init,

  4338.     NULL,

  4339.     vc1_decode_end,

  4340.     vc1_decode_frame,

  4341.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4342.     NULL,

  4343.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  4344.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_VC1, PIX_FMT_NONE}

  4345. };

  4346. #endif