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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.         done = 1;

  66.         init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  67.                  ff_vc1_bfraction_bits, 1, 1,

  68.                  ff_vc1_bfraction_codes, 1, 1, INIT_VLC_USE_STATIC);

  69.         init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  70.                  ff_vc1_norm2_bits, 1, 1,

  71.                  ff_vc1_norm2_codes, 1, 1, INIT_VLC_USE_STATIC);

  72.         init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  73.                  ff_vc1_norm6_bits, 1, 1,

  74.                  ff_vc1_norm6_codes, 2, 2, INIT_VLC_USE_STATIC);

  75.         init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  76.                  ff_vc1_imode_bits, 1, 1,

  77.                  ff_vc1_imode_codes, 1, 1, INIT_VLC_USE_STATIC);

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

  79.         {

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

  81.                      ff_vc1_ttmb_bits[i], 1, 1,

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

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

  84.                      ff_vc1_ttblk_bits[i], 1, 1,

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

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

  87.                      ff_vc1_subblkpat_bits[i], 1, 1,

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

  89.         }

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

  91.         {

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

  93.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

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

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

  96.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

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

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

  99.                      ff_vc1_mv_diff_bits[i], 1, 1,

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

  101.         }

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

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

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

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

  106.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

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

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

  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, uvdxy, 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.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

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

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

  549.     if(!v->rnd){

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

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

  552.     }else{

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

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

  555.     }

  556. }

  557. 

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

  559.  */

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

  561. {

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

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

  564.     uint8_t *srcY;

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

  566.     int off;

  567. 

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

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

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

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

  572. 

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

  574. 

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

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

  577. 

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

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

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

  581.     }else{

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

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

  584.     }

  585. 

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

  587. 

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

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

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

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

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

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

  594.         srcY = s->edge_emu_buffer;

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

  596.         if(v->rangeredfrm) {

  597.             int i, j;

  598.             uint8_t *src;

  599. 

  600.             src = srcY;

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

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

  603.                 src += s->linesize;

  604.             }

  605.         }

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

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

  608.             int i, j;

  609.             uint8_t *src;

  610. 

  611.             src = srcY;

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

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

  614.                 src += s->linesize;

  615.             }

  616.         }

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

  618.     }

  619. 

  620.     if(s->mspel) {

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

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

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

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

  625.         if(!v->rnd)

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

  627.         else

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

  629.     }

  630. }

  631. 

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

  633. {

  634.     if(a < b) {

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

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

  637.     } else {

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

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

  640.     }

  641. }

  642. 

  643. 

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

  645.  */

  646. static void vc1_mc_4mv_chroma(VC1Context *v)

  647. {

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

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

  650.     uint8_t *srcU, *srcV;

  651.     int uvdxy, uvmx, uvmy, uvsrc_x, uvsrc_y;

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

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

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

  655. 

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

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

  658. 

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

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

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

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

  663.     }

  664. 

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

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

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

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

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

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

  671.         switch(idx) {

  672.         case 0x1:

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

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

  675.             break;

  676.         case 0x2:

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

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

  679.             break;

  680.         case 0x4:

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

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

  683.             break;

  684.         case 0x8:

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

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

  687.             break;

  688.         }

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

  690.         int t1 = 0, t2 = 0;

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

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

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

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

  695.     } else {

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

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

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

  699.     }

  700. 

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

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

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

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

  705.     if(v->fastuvmc) {

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

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

  708.     }

  709. 

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

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

  712. 

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

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

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

  716.     }else{

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

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

  719.     }

  720. 

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

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

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

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

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

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

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

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

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

  730.         srcU = s->edge_emu_buffer;

  731.         srcV = s->edge_emu_buffer + 16;

  732. 

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

  734.         if(v->rangeredfrm) {

  735.             int i, j;

  736.             uint8_t *src, *src2;

  737. 

  738.             src = srcU; src2 = srcV;

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

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

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

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

  743.                 }

  744.                 src += s->uvlinesize;

  745.                 src2 += s->uvlinesize;

  746.             }

  747.         }

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

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

  750.             int i, j;

  751.             uint8_t *src, *src2;

  752. 

  753.             src = srcU; src2 = srcV;

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

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

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

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

  758.                 }

  759.                 src += s->uvlinesize;

  760.                 src2 += s->uvlinesize;

  761.             }

  762.         }

  763.     }

  764. 

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

  766.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

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

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

  769.     if(!v->rnd){

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

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

  772.     }else{

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

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

  775.     }

  776. }

  777. 

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

  779. 

  780. /**

  781.  * Decode Simple/Main Profiles sequence header

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

  783.  * @param avctx Codec context

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

  785.  * @return Status

  786.  */

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

  788. {

  789.     VC1Context *v = avctx->priv_data;

  790. 

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

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

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

  794.     {

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

  796.     }

  797. 

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

  799.     {

  800.         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;

  801.         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;

  802.         return decode_sequence_header_adv(v, gb);

  803.     }

  804.     else

  805.     {

  806.         v->zz_8x4 = wmv2_scantableA;

  807.         v->zz_4x8 = wmv2_scantableB;

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

  809.         if (v->res_sm)

  810.         {

  811.             av_log(avctx, AV_LOG_ERROR,

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

  813.             return -1;

  814.         }

  815.     }

  816. 

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

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

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

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

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

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

  823.     {

  824.         av_log(avctx, AV_LOG_ERROR,

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

  826.     }

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

  828.         v->s.loop_filter = 0;

  829. 

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

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

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

  833.     if (!v->res_fasttx)

  834.     {

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

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

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

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

  839.     }

  840. 

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

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

  843.     {

  844.         av_log(avctx, AV_LOG_ERROR,

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

  846.         return -1;

  847.     }

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

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

  850.     {

  851.         av_log(avctx, AV_LOG_ERROR,

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

  853.         return -1;

  854.     }

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

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

  857. 

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

  859.     if (v->res_transtab)

  860.     {

  861.         av_log(avctx, AV_LOG_ERROR,

  862.                "1 for reserved RES_TRANSTAB is forbidden\n");

  863.         return -1;

  864.     }

  865. 

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

  867. 

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

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

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

  871.     {

  872.         av_log(avctx, AV_LOG_INFO,

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

  874.     }

  875. 

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

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

  878. 

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

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

  881.     if (!v->res_rtm_flag)

  882.     {

  883. //            av_log(avctx, AV_LOG_ERROR,

  884. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  885.         av_log(avctx, AV_LOG_ERROR,

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

  887.         //return -1;

  888.     }

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

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

  891.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  900.                );

  901.     return 0;

  902. }

  903. 

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

  905. {

  906.     v->res_rtm_flag = 1;

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

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

  909.     {

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

  911.     }

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

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

  914.     {

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

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

  917.         return -1;

  918.     }

  919. 

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

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

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

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

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

  925. 

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

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

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

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

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

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

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

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

  934.     skip_bits1(gb); // reserved

  935. 

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

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

  938. 

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

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

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

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

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

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

  945.                v->tfcntrflag, v->finterpflag

  946.                );

  947. 

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

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

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

  951.         return -1;

  952.     }

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

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

  955.         int w, h, ar = 0;

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

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

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

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

  960.         if(get_bits1(gb))

  961.             ar = get_bits(gb, 4);

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

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

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

  965.             w = get_bits(gb, 8);

  966.             h = get_bits(gb, 8);

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

  968.         }

  969.         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);

  970. 

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

  972.             if(get_bits1(gb)) {

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

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

  975.             } else {

  976.                 int nr, dr;

  977.                 nr = get_bits(gb, 8);

  978.                 dr = get_bits(gb, 4);

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

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

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

  982.                 }

  983.             }

  984.         }

  985. 

  986.         if(get_bits1(gb)){

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

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

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

  990.         }

  991.     }

  992. 

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

  994.     if(v->hrd_param_flag) {

  995.         int i;

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

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

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

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

  1000.             skip_bits(gb, 16); //hrd_rate[n]

  1001.             skip_bits(gb, 16); //hrd_buffer[n]

  1002.         }

  1003.     }

  1004.     return 0;

  1005. }

  1006. 

  1007. static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)

  1008. {

  1009.     VC1Context *v = avctx->priv_data;

  1010.     int i;

  1011. 

  1012.     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));

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

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

  1015.     v->panscanflag = get_bits1(gb);

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

  1017.     v->s.loop_filter = get_bits1(gb);

  1018.     v->fastuvmc = get_bits1(gb);

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

  1020.     v->dquant = get_bits(gb, 2);

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

  1022.     v->overlap = get_bits1(gb);

  1023.     v->quantizer_mode = get_bits(gb, 2);

  1024. 

  1025.     if(v->hrd_param_flag){

  1026.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1027.             skip_bits(gb, 8); //hrd_full[n]

  1028.         }

  1029.     }

  1030. 

  1031.     if(get_bits1(gb)){

  1032.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1033.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1034.     }

  1035.     if(v->extended_mv)

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

  1037.     if((v->range_mapy_flag = get_bits1(gb))) {

  1038.         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");

  1039.         v->range_mapy = get_bits(gb, 3);

  1040.     }

  1041.     if((v->range_mapuv_flag = get_bits1(gb))) {

  1042.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1043.         v->range_mapuv = get_bits(gb, 3);

  1044.     }

  1045. 

  1046.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1047.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1048.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1049.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1050.         v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,

  1051.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1052. 

  1053.     return 0;

  1054. }

  1055. 

  1056. static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1057. {

  1058.     int pqindex, lowquant, status;

  1059. 

  1060.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1061.     skip_bits(gb, 2); //framecnt unused

  1062.     v->rangeredfrm = 0;

  1063.     if (v->rangered) v->rangeredfrm = get_bits1(gb);

  1064.     v->s.pict_type = get_bits1(gb);

  1065.     if (v->s.avctx->max_b_frames) {

  1066.         if (!v->s.pict_type) {

  1067.             if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;

  1068.             else v->s.pict_type = FF_B_TYPE;

  1069.         } else v->s.pict_type = FF_P_TYPE;

  1070.     } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;

  1071. 

  1072.     v->bi_type = 0;

  1073.     if(v->s.pict_type == FF_B_TYPE) {

  1074.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1075.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1076.         if(v->bfraction == 0) {

  1077.             v->s.pict_type = FF_BI_TYPE;

  1078.         }

  1079.     }

  1080.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1081.         skip_bits(gb, 7); // skip buffer fullness

  1082. 

  1083.     /* calculate RND */

  1084.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1085.         v->rnd = 1;

  1086.     if(v->s.pict_type == FF_P_TYPE)

  1087.         v->rnd ^= 1;

  1088. 

  1089.     /* Quantizer stuff */

  1090.     pqindex = get_bits(gb, 5);

  1091.     if(!pqindex) return -1;

  1092.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1093.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1094.     else

  1095.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1096. 

  1097.     v->pquantizer = 1;

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

  1099.         v->pquantizer = pqindex < 9;

  1100.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1101.         v->pquantizer = 0;

  1102.     v->pqindex = pqindex;

  1103.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1104.     else v->halfpq = 0;

  1105.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1106.         v->pquantizer = get_bits1(gb);

  1107.     v->dquantfrm = 0;

  1108.     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);

  1109.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1110.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1111.     v->range_x = 1 << (v->k_x - 1);

  1112.     v->range_y = 1 << (v->k_y - 1);

  1113.     if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);

  1114. 

  1115.     if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){

  1116.         v->x8_type = get_bits1(gb);

  1117.     }else v->x8_type = 0;

  1118. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1119. //        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1120. 

  1121.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1122. 

  1123.     switch(v->s.pict_type) {

  1124.     case FF_P_TYPE:

  1125.         if (v->pq < 5) v->tt_index = 0;

  1126.         else if(v->pq < 13) v->tt_index = 1;

  1127.         else v->tt_index = 2;

  1128. 

  1129.         lowquant = (v->pq > 12) ? 0 : 1;

  1130.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1131.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1132.         {

  1133.             int scale, shift, i;

  1134.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1135.             v->lumscale = get_bits(gb, 6);

  1136.             v->lumshift = get_bits(gb, 6);

  1137.             v->use_ic = 1;

  1138.             /* fill lookup tables for intensity compensation */

  1139.             if(!v->lumscale) {

  1140.                 scale = -64;

  1141.                 shift = (255 - v->lumshift * 2) << 6;

  1142.                 if(v->lumshift > 31)

  1143.                     shift += 128 << 6;

  1144.             } else {

  1145.                 scale = v->lumscale + 32;

  1146.                 if(v->lumshift > 31)

  1147.                     shift = (v->lumshift - 64) << 6;

  1148.                 else

  1149.                     shift = v->lumshift << 6;

  1150.             }

  1151.             for(i = 0; i < 256; i++) {

  1152.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1153.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1154.             }

  1155.         }

  1156.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1157.             v->s.quarter_sample = 0;

  1158.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1159.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1160.                 v->s.quarter_sample = 0;

  1161.             else

  1162.                 v->s.quarter_sample = 1;

  1163.         } else

  1164.             v->s.quarter_sample = 1;

  1165.         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));

  1166. 

  1167.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1168.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1169.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1170.         {

  1171.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1172.             if (status < 0) return -1;

  1173.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1174.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1175.         } else {

  1176.             v->mv_type_is_raw = 0;

  1177.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1178.         }

  1179.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1180.         if (status < 0) return -1;

  1181.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1182.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1183. 

  1184.         /* Hopefully this is correct for P frames */

  1185.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1186.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1187. 

  1188.         if (v->dquant)

  1189.         {

  1190.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1191.             vop_dquant_decoding(v);

  1192.         }

  1193. 

  1194.         v->ttfrm = 0; //FIXME Is that so ?

  1195.         if (v->vstransform)

  1196.         {

  1197.             v->ttmbf = get_bits1(gb);

  1198.             if (v->ttmbf)

  1199.             {

  1200.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1201.             }

  1202.         } else {

  1203.             v->ttmbf = 1;

  1204.             v->ttfrm = TT_8X8;

  1205.         }

  1206.         break;

  1207.     case FF_B_TYPE:

  1208.         if (v->pq < 5) v->tt_index = 0;

  1209.         else if(v->pq < 13) v->tt_index = 1;

  1210.         else v->tt_index = 2;

  1211. 

  1212.         lowquant = (v->pq > 12) ? 0 : 1;

  1213.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1214.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1215.         v->s.mspel = v->s.quarter_sample;

  1216. 

  1217.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1218.         if (status < 0) return -1;

  1219.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1220.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1221.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1222.         if (status < 0) return -1;

  1223.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1224.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1225. 

  1226.         v->s.mv_table_index = get_bits(gb, 2);

  1227.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1228. 

  1229.         if (v->dquant)

  1230.         {

  1231.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1232.             vop_dquant_decoding(v);

  1233.         }

  1234. 

  1235.         v->ttfrm = 0;

  1236.         if (v->vstransform)

  1237.         {

  1238.             v->ttmbf = get_bits1(gb);

  1239.             if (v->ttmbf)

  1240.             {

  1241.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1242.             }

  1243.         } else {

  1244.             v->ttmbf = 1;

  1245.             v->ttfrm = TT_8X8;

  1246.         }

  1247.         break;

  1248.     }

  1249. 

  1250.     if(!v->x8_type)

  1251.     {

  1252.         /* AC Syntax */

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

  1254.         if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1255.         {

  1256.             v->y_ac_table_index = decode012(gb);

  1257.         }

  1258.         /* DC Syntax */

  1259.         v->s.dc_table_index = get_bits1(gb);

  1260.     }

  1261. 

  1262.     if(v->s.pict_type == FF_BI_TYPE) {

  1263.         v->s.pict_type = FF_B_TYPE;

  1264.         v->bi_type = 1;

  1265.     }

  1266.     return 0;

  1267. }

  1268. 

  1269. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1270. {

  1271.     int pqindex, lowquant;

  1272.     int status;

  1273. 

  1274.     v->p_frame_skipped = 0;

  1275. 

  1276.     if(v->interlace){

  1277.         v->fcm = decode012(gb);

  1278.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1279.     }

  1280.     switch(get_unary(gb, 0, 4)) {

  1281.     case 0:

  1282.         v->s.pict_type = FF_P_TYPE;

  1283.         break;

  1284.     case 1:

  1285.         v->s.pict_type = FF_B_TYPE;

  1286.         break;

  1287.     case 2:

  1288.         v->s.pict_type = FF_I_TYPE;

  1289.         break;

  1290.     case 3:

  1291.         v->s.pict_type = FF_BI_TYPE;

  1292.         break;

  1293.     case 4:

  1294.         v->s.pict_type = FF_P_TYPE; // skipped pic

  1295.         v->p_frame_skipped = 1;

  1296.         return 0;

  1297.     }

  1298.     if(v->tfcntrflag)

  1299.         skip_bits(gb, 8);

  1300.     if(v->broadcast) {

  1301.         if(!v->interlace || v->psf) {

  1302.             v->rptfrm = get_bits(gb, 2);

  1303.         } else {

  1304.             v->tff = get_bits1(gb);

  1305.             v->rptfrm = get_bits1(gb);

  1306.         }

  1307.     }

  1308.     if(v->panscanflag) {

  1309.         //...

  1310.     }

  1311.     v->rnd = get_bits1(gb);

  1312.     if(v->interlace)

  1313.         v->uvsamp = get_bits1(gb);

  1314.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1315.     if(v->s.pict_type == FF_B_TYPE) {

  1316.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1317.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1318.         if(v->bfraction == 0) {

  1319.             v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */

  1320.         }

  1321.     }

  1322.     pqindex = get_bits(gb, 5);

  1323.     if(!pqindex) return -1;

  1324.     v->pqindex = pqindex;

  1325.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1326.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1327.     else

  1328.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1329. 

  1330.     v->pquantizer = 1;

  1331.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1332.         v->pquantizer = pqindex < 9;

  1333.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1334.         v->pquantizer = 0;

  1335.     v->pqindex = pqindex;

  1336.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1337.     else v->halfpq = 0;

  1338.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1339.         v->pquantizer = get_bits1(gb);

  1340.     if(v->postprocflag)

  1341.         v->postproc = get_bits(gb, 2);

  1342. 

  1343.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1344. 

  1345.     switch(v->s.pict_type) {

  1346.     case FF_I_TYPE:

  1347.     case FF_BI_TYPE:

  1348.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1349.         if (status < 0) return -1;

  1350.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1351.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1352.         v->condover = CONDOVER_NONE;

  1353.         if(v->overlap && v->pq <= 8) {

  1354.             v->condover = decode012(gb);

  1355.             if(v->condover == CONDOVER_SELECT) {

  1356.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1357.                 if (status < 0) return -1;

  1358.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1359.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1360.             }

  1361.         }

  1362.         break;

  1363.     case FF_P_TYPE:

  1364.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1365.         else v->mvrange = 0;

  1366.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1367.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1368.         v->range_x = 1 << (v->k_x - 1);

  1369.         v->range_y = 1 << (v->k_y - 1);

  1370. 

  1371.         if (v->pq < 5) v->tt_index = 0;

  1372.         else if(v->pq < 13) v->tt_index = 1;

  1373.         else v->tt_index = 2;

  1374. 

  1375.         lowquant = (v->pq > 12) ? 0 : 1;

  1376.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1377.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1378.         {

  1379.             int scale, shift, i;

  1380.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1381.             v->lumscale = get_bits(gb, 6);

  1382.             v->lumshift = get_bits(gb, 6);

  1383.             /* fill lookup tables for intensity compensation */

  1384.             if(!v->lumscale) {

  1385.                 scale = -64;

  1386.                 shift = (255 - v->lumshift * 2) << 6;

  1387.                 if(v->lumshift > 31)

  1388.                     shift += 128 << 6;

  1389.             } else {

  1390.                 scale = v->lumscale + 32;

  1391.                 if(v->lumshift > 31)

  1392.                     shift = (v->lumshift - 64) << 6;

  1393.                 else

  1394.                     shift = v->lumshift << 6;

  1395.             }

  1396.             for(i = 0; i < 256; i++) {

  1397.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1398.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1399.             }

  1400.             v->use_ic = 1;

  1401.         }

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

  1403.             v->s.quarter_sample = 0;

  1404.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1405.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1406.                 v->s.quarter_sample = 0;

  1407.             else

  1408.                 v->s.quarter_sample = 1;

  1409.         } else

  1410.             v->s.quarter_sample = 1;

  1411.         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));

  1412. 

  1413.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1414.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1415.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1416.         {

  1417.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1418.             if (status < 0) return -1;

  1419.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1420.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1421.         } else {

  1422.             v->mv_type_is_raw = 0;

  1423.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1424.         }

  1425.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1426.         if (status < 0) return -1;

  1427.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1428.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1429. 

  1430.         /* Hopefully this is correct for P frames */

  1431.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1432.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1433.         if (v->dquant)

  1434.         {

  1435.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1436.             vop_dquant_decoding(v);

  1437.         }

  1438. 

  1439.         v->ttfrm = 0; //FIXME Is that so ?

  1440.         if (v->vstransform)

  1441.         {

  1442.             v->ttmbf = get_bits1(gb);

  1443.             if (v->ttmbf)

  1444.             {

  1445.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1446.             }

  1447.         } else {

  1448.             v->ttmbf = 1;

  1449.             v->ttfrm = TT_8X8;

  1450.         }

  1451.         break;

  1452.     case FF_B_TYPE:

  1453.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1454.         else v->mvrange = 0;

  1455.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1456.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1457.         v->range_x = 1 << (v->k_x - 1);

  1458.         v->range_y = 1 << (v->k_y - 1);

  1459. 

  1460.         if (v->pq < 5) v->tt_index = 0;

  1461.         else if(v->pq < 13) v->tt_index = 1;

  1462.         else v->tt_index = 2;

  1463. 

  1464.         lowquant = (v->pq > 12) ? 0 : 1;

  1465.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1466.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1467.         v->s.mspel = v->s.quarter_sample;

  1468. 

  1469.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

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

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

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

  1473.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1474.         if (status < 0) return -1;

  1475.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1476.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1477. 

  1478.         v->s.mv_table_index = get_bits(gb, 2);

  1479.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1480. 

  1481.         if (v->dquant)

  1482.         {

  1483.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1484.             vop_dquant_decoding(v);

  1485.         }

  1486. 

  1487.         v->ttfrm = 0;

  1488.         if (v->vstransform)

  1489.         {

  1490.             v->ttmbf = get_bits1(gb);

  1491.             if (v->ttmbf)

  1492.             {

  1493.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1494.             }

  1495.         } else {

  1496.             v->ttmbf = 1;

  1497.             v->ttfrm = TT_8X8;

  1498.         }

  1499.         break;

  1500.     }

  1501. 

  1502.     /* AC Syntax */

  1503.     v->c_ac_table_index = decode012(gb);

  1504.     if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1505.     {

  1506.         v->y_ac_table_index = decode012(gb);

  1507.     }

  1508.     /* DC Syntax */

  1509.     v->s.dc_table_index = get_bits1(gb);

  1510.     if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {

  1511.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1512.         vop_dquant_decoding(v);

  1513.     }

  1514. 

  1515.     v->bi_type = 0;

  1516.     if(v->s.pict_type == FF_BI_TYPE) {

  1517.         v->s.pict_type = FF_B_TYPE;

  1518.         v->bi_type = 1;

  1519.     }

  1520.     return 0;

  1521. }

  1522. 

  1523. /***********************************************************************/

  1524. /**

  1525.  * @defgroup vc1block VC-1 Block-level functions

  1526.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1527.  * @{

  1528.  */

  1529. 

  1530. /**

  1531.  * @def GET_MQUANT

  1532.  * @brief Get macroblock-level quantizer scale

  1533.  */

  1534. #define GET_MQUANT()                                           \

  1535.   if (v->dquantfrm)                                            \

  1536.   {                                                            \

  1537.     int edges = 0;                                             \

  1538.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1539.     {                                                          \

  1540.       if (v->dqbilevel)                                        \

  1541.       {                                                        \

  1542.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1543.       }                                                        \

  1544.       else                                                     \

  1545.       {                                                        \

  1546.         mqdiff = get_bits(gb, 3);                              \

  1547.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1548.         else mquant = get_bits(gb, 5);                         \

  1549.       }                                                        \

  1550.     }                                                          \

  1551.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1552.         edges = 1 << v->dqsbedge;                              \

  1553.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1554.         edges = (3 << v->dqsbedge) % 15;                       \

  1555.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1556.         edges = 15;                                            \

  1557.     if((edges&1) && !s->mb_x)                                  \

  1558.         mquant = v->altpq;                                     \

  1559.     if((edges&2) && s->first_slice_line)                       \

  1560.         mquant = v->altpq;                                     \

  1561.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1562.         mquant = v->altpq;                                     \

  1563.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1564.         mquant = v->altpq;                                     \

  1565.   }

  1566. 

  1567. /**

  1568.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1569.  * @brief Get MV differentials

  1570.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1571.  * @param _dmv_x Horizontal differential for decoded MV

  1572.  * @param _dmv_y Vertical differential for decoded MV

  1573.  */

  1574. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1575.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1576.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1577.   if (index > 36)                                                   \

  1578.   {                                                                 \

  1579.     mb_has_coeffs = 1;                                              \

  1580.     index -= 37;                                                    \

  1581.   }                                                                 \

  1582.   else mb_has_coeffs = 0;                                           \

  1583.   s->mb_intra = 0;                                                  \

  1584.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1585.   else if (index == 35)                                             \

  1586.   {                                                                 \

  1587.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1588.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1589.   }                                                                 \

  1590.   else if (index == 36)                                             \

  1591.   {                                                                 \

  1592.     _dmv_x = 0;                                                     \

  1593.     _dmv_y = 0;                                                     \

  1594.     s->mb_intra = 1;                                                \

  1595.   }                                                                 \

  1596.   else                                                              \

  1597.   {                                                                 \

  1598.     index1 = index%6;                                               \

  1599.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1600.     else                                   val = 0;                 \

  1601.     if(size_table[index1] - val > 0)                                \

  1602.         val = get_bits(gb, size_table[index1] - val);               \

  1603.     else                                   val = 0;                 \

  1604.     sign = 0 - (val&1);                                             \

  1605.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1606.                                                                     \

  1607.     index1 = index/6;                                               \

  1608.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1609.     else                                   val = 0;                 \

  1610.     if(size_table[index1] - val > 0)                                \

  1611.         val = get_bits(gb, size_table[index1] - val);               \

  1612.     else                                   val = 0;                 \

  1613.     sign = 0 - (val&1);                                             \

  1614.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1615.   }

  1616. 

  1617. /** Predict and set motion vector

  1618.  */

  1619. 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)

  1620. {

  1621.     int xy, wrap, off = 0;

  1622.     int16_t *A, *B, *C;

  1623.     int px, py;

  1624.     int sum;

  1625. 

  1626.     /* scale MV difference to be quad-pel */

  1627.     dmv_x <<= 1 - s->quarter_sample;

  1628.     dmv_y <<= 1 - s->quarter_sample;

  1629. 

  1630.     wrap = s->b8_stride;

  1631.     xy = s->block_index[n];

  1632. 

  1633.     if(s->mb_intra){

  1634.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

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

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

  1637.         s->current_picture.motion_val[1][xy][1] = 0;

  1638.         if(mv1) { /* duplicate motion data for 1-MV block */

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

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

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

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

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

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

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

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

  1647.             s->current_picture.motion_val[1][xy + wrap][0] = 0;

  1648.             s->current_picture.motion_val[1][xy + wrap][1] = 0;

  1649.             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;

  1650.             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;

  1651.         }

  1652.         return;

  1653.     }

  1654. 

  1655.     C = s->current_picture.motion_val[0][xy - 1];

  1656.     A = s->current_picture.motion_val[0][xy - wrap];

  1657.     if(mv1)

  1658.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1659.     else {

  1660.         //in 4-MV mode different blocks have different B predictor position

  1661.         switch(n){

  1662.         case 0:

  1663.             off = (s->mb_x > 0) ? -1 : 1;

  1664.             break;

  1665.         case 1:

  1666.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1667.             break;

  1668.         case 2:

  1669.             off = 1;

  1670.             break;

  1671.         case 3:

  1672.             off = -1;

  1673.         }

  1674.     }

  1675.     B = s->current_picture.motion_val[0][xy - wrap + off];

  1676. 

  1677.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1678.         if(s->mb_width == 1) {

  1679.             px = A[0];

  1680.             py = A[1];

  1681.         } else {

  1682.             px = mid_pred(A[0], B[0], C[0]);

  1683.             py = mid_pred(A[1], B[1], C[1]);

  1684.         }

  1685.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1686.         px = C[0];

  1687.         py = C[1];

  1688.     } else {

  1689.         px = py = 0;

  1690.     }

  1691.     /* Pullback MV as specified in 8.3.5.3.4 */

  1692.     {

  1693.         int qx, qy, X, Y;

  1694.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1695.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1696.         X = (s->mb_width << 6) - 4;

  1697.         Y = (s->mb_height << 6) - 4;

  1698.         if(mv1) {

  1699.             if(qx + px < -60) px = -60 - qx;

  1700.             if(qy + py < -60) py = -60 - qy;

  1701.         } else {

  1702.             if(qx + px < -28) px = -28 - qx;

  1703.             if(qy + py < -28) py = -28 - qy;

  1704.         }

  1705.         if(qx + px > X) px = X - qx;

  1706.         if(qy + py > Y) py = Y - qy;

  1707.     }

  1708.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1709.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1710.         if(is_intra[xy - wrap])

  1711.             sum = FFABS(px) + FFABS(py);

  1712.         else

  1713.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1714.         if(sum > 32) {

  1715.             if(get_bits1(&s->gb)) {

  1716.                 px = A[0];

  1717.                 py = A[1];

  1718.             } else {

  1719.                 px = C[0];

  1720.                 py = C[1];

  1721.             }

  1722.         } else {

  1723.             if(is_intra[xy - 1])

  1724.                 sum = FFABS(px) + FFABS(py);

  1725.             else

  1726.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1727.             if(sum > 32) {

  1728.                 if(get_bits1(&s->gb)) {

  1729.                     px = A[0];

  1730.                     py = A[1];

  1731.                 } else {

  1732.                     px = C[0];

  1733.                     py = C[1];

  1734.                 }

  1735.             }

  1736.         }

  1737.     }

  1738.     /* store MV using signed modulus of MV range defined in 4.11 */

  1739.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1740.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1741.     if(mv1) { /* duplicate motion data for 1-MV block */

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

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

  1744.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1745.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1746.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1747.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1748.     }

  1749. }

  1750. 

  1751. /** Motion compensation for direct or interpolated blocks in B-frames

  1752.  */

  1753. static void vc1_interp_mc(VC1Context *v)

  1754. {

  1755.     MpegEncContext *s = &v->s;

  1756.     DSPContext *dsp = &v->s.dsp;

  1757.     uint8_t *srcY, *srcU, *srcV;

  1758.     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1759. 

  1760.     if(!v->s.next_picture.data[0])return;

  1761. 

  1762.     mx = s->mv[1][0][0];

  1763.     my = s->mv[1][0][1];

  1764.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1765.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1766.     if(v->fastuvmc) {

  1767.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1768.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1769.     }

  1770.     srcY = s->next_picture.data[0];

  1771.     srcU = s->next_picture.data[1];

  1772.     srcV = s->next_picture.data[2];

  1773. 

  1774.     src_x = s->mb_x * 16 + (mx >> 2);

  1775.     src_y = s->mb_y * 16 + (my >> 2);

  1776.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1777.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1778. 

  1779.     if(v->profile != PROFILE_ADVANCED){

  1780.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1781.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1782.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1783.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1784.     }else{

  1785.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1786.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1787.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1788.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1789.     }

  1790. 

  1791.     srcY += src_y * s->linesize + src_x;

  1792.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1793.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1794. 

  1795.     /* for grayscale we should not try to read from unknown area */

  1796.     if(s->flags & CODEC_FLAG_GRAY) {

  1797.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1798.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1799.     }

  1800. 

  1801.     if(v->rangeredfrm

  1802.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  1803.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  1804.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1805. 

  1806.         srcY -= s->mspel * (1 + s->linesize);

  1807.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1808.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1809.         srcY = s->edge_emu_buffer;

  1810.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1811.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1812.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1813.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1814.         srcU = uvbuf;

  1815.         srcV = uvbuf + 16;

  1816.         /* if we deal with range reduction we need to scale source blocks */

  1817.         if(v->rangeredfrm) {

  1818.             int i, j;

  1819.             uint8_t *src, *src2;

  1820. 

  1821.             src = srcY;

  1822.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1823.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1824.                 src += s->linesize;

  1825.             }

  1826.             src = srcU; src2 = srcV;

  1827.             for(j = 0; j < 9; j++) {

  1828.                 for(i = 0; i < 9; i++) {

  1829.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1830.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1831.                 }

  1832.                 src += s->uvlinesize;

  1833.                 src2 += s->uvlinesize;

  1834.             }

  1835.         }

  1836.         srcY += s->mspel * (1 + s->linesize);

  1837.     }

  1838. 

  1839.     if(s->mspel) {

  1840.         dxy = ((my & 3) << 2) | (mx & 3);

  1841.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  1842.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);

  1843.         srcY += s->linesize * 8;

  1844.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  1845.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  1846.     } else { // hpel mc

  1847.         dxy = (my & 2) | ((mx & 2) >> 1);

  1848. 

  1849.         if(!v->rnd)

  1850.             dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1851.         else

  1852.             dsp->avg_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1853.     }

  1854. 

  1855.     if(s->flags & CODEC_FLAG_GRAY) return;

  1856.     /* Chroma MC always uses qpel blilinear */

  1857.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  1858.     uvmx = (uvmx&3)<<1;

  1859.     uvmy = (uvmy&3)<<1;

  1860.     if(!v->rnd){

  1861.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1862.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1863.     }else{

  1864.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1865.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1866.     }

  1867. }

  1868. 

  1869. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1870. {

  1871.     int n = bfrac;

  1872. 

  1873. #if B_FRACTION_DEN==256

  1874.     if(inv)

  1875.         n -= 256;

  1876.     if(!qs)

  1877.         return 2 * ((value * n + 255) >> 9);

  1878.     return (value * n + 128) >> 8;

  1879. #else

  1880.     if(inv)

  1881.         n -= B_FRACTION_DEN;

  1882.     if(!qs)

  1883.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1884.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1885. #endif

  1886. }

  1887. 

  1888. /** Reconstruct motion vector for B-frame and do motion compensation

  1889.  */

  1890. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1891. {

  1892.     if(v->use_ic) {

  1893.         v->mv_mode2 = v->mv_mode;

  1894.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1895.     }

  1896.     if(direct) {

  1897.         vc1_mc_1mv(v, 0);

  1898.         vc1_interp_mc(v);

  1899.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1900.         return;

  1901.     }

  1902.     if(mode == BMV_TYPE_INTERPOLATED) {

  1903.         vc1_mc_1mv(v, 0);

  1904.         vc1_interp_mc(v);

  1905.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1906.         return;

  1907.     }

  1908. 

  1909.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1910.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1911.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1912. }

  1913. 

  1914. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1915. {

  1916.     MpegEncContext *s = &v->s;

  1917.     int xy, wrap, off = 0;

  1918.     int16_t *A, *B, *C;

  1919.     int px, py;

  1920.     int sum;

  1921.     int r_x, r_y;

  1922.     const uint8_t *is_intra = v->mb_type[0];

  1923. 

  1924.     r_x = v->range_x;

  1925.     r_y = v->range_y;

  1926.     /* scale MV difference to be quad-pel */

  1927.     dmv_x[0] <<= 1 - s->quarter_sample;

  1928.     dmv_y[0] <<= 1 - s->quarter_sample;

  1929.     dmv_x[1] <<= 1 - s->quarter_sample;

  1930.     dmv_y[1] <<= 1 - s->quarter_sample;

  1931. 

  1932.     wrap = s->b8_stride;

  1933.     xy = s->block_index[0];

  1934. 

  1935.     if(s->mb_intra) {

  1936.         s->current_picture.motion_val[0][xy][0] =

  1937.         s->current_picture.motion_val[0][xy][1] =

  1938.         s->current_picture.motion_val[1][xy][0] =

  1939.         s->current_picture.motion_val[1][xy][1] = 0;

  1940.         return;

  1941.     }

  1942.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  1943.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  1944.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  1945.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  1946. 

  1947.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  1948.     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));

  1949.     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));

  1950.     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));

  1951.     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));

  1952.     if(direct) {

  1953.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  1954.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  1955.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  1956.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  1957.         return;

  1958.     }

  1959. 

  1960.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  1961.         C = s->current_picture.motion_val[0][xy - 2];

  1962.         A = s->current_picture.motion_val[0][xy - wrap*2];

  1963.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1964.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  1965. 

  1966.         if(!s->mb_x) C[0] = C[1] = 0;

  1967.         if(!s->first_slice_line) { // predictor A is not out of bounds

  1968.             if(s->mb_width == 1) {

  1969.                 px = A[0];

  1970.                 py = A[1];

  1971.             } else {

  1972.                 px = mid_pred(A[0], B[0], C[0]);

  1973.                 py = mid_pred(A[1], B[1], C[1]);

  1974.             }

  1975.         } else if(s->mb_x) { // predictor C is not out of bounds

  1976.             px = C[0];

  1977.             py = C[1];

  1978.         } else {

  1979.             px = py = 0;

  1980.         }

  1981.         /* Pullback MV as specified in 8.3.5.3.4 */

  1982.         {

  1983.             int qx, qy, X, Y;

  1984.             if(v->profile < PROFILE_ADVANCED) {

  1985.                 qx = (s->mb_x << 5);

  1986.                 qy = (s->mb_y << 5);

  1987.                 X = (s->mb_width << 5) - 4;

  1988.                 Y = (s->mb_height << 5) - 4;

  1989.                 if(qx + px < -28) px = -28 - qx;

  1990.                 if(qy + py < -28) py = -28 - qy;

  1991.                 if(qx + px > X) px = X - qx;

  1992.                 if(qy + py > Y) py = Y - qy;

  1993.             } else {

  1994.                 qx = (s->mb_x << 6);

  1995.                 qy = (s->mb_y << 6);

  1996.                 X = (s->mb_width << 6) - 4;

  1997.                 Y = (s->mb_height << 6) - 4;

  1998.                 if(qx + px < -60) px = -60 - qx;

  1999.                 if(qy + py < -60) py = -60 - qy;

  2000.                 if(qx + px > X) px = X - qx;

  2001.                 if(qy + py > Y) py = Y - qy;

  2002.             }

  2003.         }

  2004.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2005.         if(0 && !s->first_slice_line && s->mb_x) {

  2006.             if(is_intra[xy - wrap])

  2007.                 sum = FFABS(px) + FFABS(py);

  2008.             else

  2009.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2010.             if(sum > 32) {

  2011.                 if(get_bits1(&s->gb)) {

  2012.                     px = A[0];

  2013.                     py = A[1];

  2014.                 } else {

  2015.                     px = C[0];

  2016.                     py = C[1];

  2017.                 }

  2018.             } else {

  2019.                 if(is_intra[xy - 2])

  2020.                     sum = FFABS(px) + FFABS(py);

  2021.                 else

  2022.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2023.                 if(sum > 32) {

  2024.                     if(get_bits1(&s->gb)) {

  2025.                         px = A[0];

  2026.                         py = A[1];

  2027.                     } else {

  2028.                         px = C[0];

  2029.                         py = C[1];

  2030.                     }

  2031.                 }

  2032.             }

  2033.         }

  2034.         /* store MV using signed modulus of MV range defined in 4.11 */

  2035.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2036.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2037.     }

  2038.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2039.         C = s->current_picture.motion_val[1][xy - 2];

  2040.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2041.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2042.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2043. 

  2044.         if(!s->mb_x) C[0] = C[1] = 0;

  2045.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2046.             if(s->mb_width == 1) {

  2047.                 px = A[0];

  2048.                 py = A[1];

  2049.             } else {

  2050.                 px = mid_pred(A[0], B[0], C[0]);

  2051.                 py = mid_pred(A[1], B[1], C[1]);

  2052.             }

  2053.         } else if(s->mb_x) { // predictor C is not out of bounds

  2054.             px = C[0];

  2055.             py = C[1];

  2056.         } else {

  2057.             px = py = 0;

  2058.         }

  2059.         /* Pullback MV as specified in 8.3.5.3.4 */

  2060.         {

  2061.             int qx, qy, X, Y;

  2062.             if(v->profile < PROFILE_ADVANCED) {

  2063.                 qx = (s->mb_x << 5);

  2064.                 qy = (s->mb_y << 5);

  2065.                 X = (s->mb_width << 5) - 4;

  2066.                 Y = (s->mb_height << 5) - 4;

  2067.                 if(qx + px < -28) px = -28 - qx;

  2068.                 if(qy + py < -28) py = -28 - qy;

  2069.                 if(qx + px > X) px = X - qx;

  2070.                 if(qy + py > Y) py = Y - qy;

  2071.             } else {

  2072.                 qx = (s->mb_x << 6);

  2073.                 qy = (s->mb_y << 6);

  2074.                 X = (s->mb_width << 6) - 4;

  2075.                 Y = (s->mb_height << 6) - 4;

  2076.                 if(qx + px < -60) px = -60 - qx;

  2077.                 if(qy + py < -60) py = -60 - qy;

  2078.                 if(qx + px > X) px = X - qx;

  2079.                 if(qy + py > Y) py = Y - qy;

  2080.             }

  2081.         }

  2082.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2083.         if(0 && !s->first_slice_line && s->mb_x) {

  2084.             if(is_intra[xy - wrap])

  2085.                 sum = FFABS(px) + FFABS(py);

  2086.             else

  2087.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2088.             if(sum > 32) {

  2089.                 if(get_bits1(&s->gb)) {

  2090.                     px = A[0];

  2091.                     py = A[1];

  2092.                 } else {

  2093.                     px = C[0];

  2094.                     py = C[1];

  2095.                 }

  2096.             } else {

  2097.                 if(is_intra[xy - 2])

  2098.                     sum = FFABS(px) + FFABS(py);

  2099.                 else

  2100.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2101.                 if(sum > 32) {

  2102.                     if(get_bits1(&s->gb)) {

  2103.                         px = A[0];

  2104.                         py = A[1];

  2105.                     } else {

  2106.                         px = C[0];

  2107.                         py = C[1];

  2108.                     }

  2109.                 }

  2110.             }

  2111.         }

  2112.         /* store MV using signed modulus of MV range defined in 4.11 */

  2113. 

  2114.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2115.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2116.     }

  2117.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2118.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2119.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2120.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2121. }

  2122. 

  2123. /** Get predicted DC value for I-frames only

  2124.  * prediction dir: left=0, top=1

  2125.  * @param s MpegEncContext

  2126.  * @param overlap flag indicating that overlap filtering is used

  2127.  * @param pq integer part of picture quantizer

  2128.  * @param[in] n block index in the current MB

  2129.  * @param dc_val_ptr Pointer to DC predictor

  2130.  * @param dir_ptr Prediction direction for use in AC prediction

  2131.  */

  2132. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2133.                               int16_t **dc_val_ptr, int *dir_ptr)

  2134. {

  2135.     int a, b, c, wrap, pred, scale;

  2136.     int16_t *dc_val;

  2137.     static const uint16_t dcpred[32] = {

  2138.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2139.          114,  102,   93,   85,   79,   73,   68,   64,

  2140.           60,   57,   54,   51,   49,   47,   45,   43,

  2141.           41,   39,   38,   37,   35,   34,   33

  2142.     };

  2143. 

  2144.     /* find prediction - wmv3_dc_scale always used here in fact */

  2145.     if (n < 4)     scale = s->y_dc_scale;

  2146.     else           scale = s->c_dc_scale;

  2147. 

  2148.     wrap = s->block_wrap[n];

  2149.     dc_val= s->dc_val[0] + s->block_index[n];

  2150. 

  2151.     /* B A

  2152.      * C X

  2153.      */

  2154.     c = dc_val[ - 1];

  2155.     b = dc_val[ - 1 - wrap];

  2156.     a = dc_val[ - wrap];

  2157. 

  2158.     if (pq < 9 || !overlap)

  2159.     {

  2160.         /* Set outer values */

  2161.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2162.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2163.     }

  2164.     else

  2165.     {

  2166.         /* Set outer values */

  2167.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2168.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2169.     }

  2170. 

  2171.     if (abs(a - b) <= abs(b - c)) {

  2172.         pred = c;

  2173.         *dir_ptr = 1;//left

  2174.     } else {

  2175.         pred = a;

  2176.         *dir_ptr = 0;//top

  2177.     }

  2178. 

  2179.     /* update predictor */

  2180.     *dc_val_ptr = &dc_val[0];

  2181.     return pred;

  2182. }

  2183. 

  2184. 

  2185. /** Get predicted DC value

  2186.  * prediction dir: left=0, top=1

  2187.  * @param s MpegEncContext

  2188.  * @param overlap flag indicating that overlap filtering is used

  2189.  * @param pq integer part of picture quantizer

  2190.  * @param[in] n block index in the current MB

  2191.  * @param a_avail flag indicating top block availability

  2192.  * @param c_avail flag indicating left block availability

  2193.  * @param dc_val_ptr Pointer to DC predictor

  2194.  * @param dir_ptr Prediction direction for use in AC prediction

  2195.  */

  2196. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2197.                               int a_avail, int c_avail,

  2198.                               int16_t **dc_val_ptr, int *dir_ptr)

  2199. {

  2200.     int a, b, c, wrap, pred, scale;

  2201.     int16_t *dc_val;

  2202.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2203.     int q1, q2 = 0;

  2204. 

  2205.     /* find prediction - wmv3_dc_scale always used here in fact */

  2206.     if (n < 4)     scale = s->y_dc_scale;

  2207.     else           scale = s->c_dc_scale;

  2208. 

  2209.     wrap = s->block_wrap[n];

  2210.     dc_val= s->dc_val[0] + s->block_index[n];

  2211. 

  2212.     /* B A

  2213.      * C X

  2214.      */

  2215.     c = dc_val[ - 1];

  2216.     b = dc_val[ - 1 - wrap];

  2217.     a = dc_val[ - wrap];

  2218.     /* scale predictors if needed */

  2219.     q1 = s->current_picture.qscale_table[mb_pos];

  2220.     if(c_avail && (n!= 1 && n!=3)) {

  2221.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2222.         if(q2 && q2 != q1)

  2223.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2224.     }

  2225.     if(a_avail && (n!= 2 && n!=3)) {

  2226.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2227.         if(q2 && q2 != q1)

  2228.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2229.     }

  2230.     if(a_avail && c_avail && (n!=3)) {

  2231.         int off = mb_pos;

  2232.         if(n != 1) off--;

  2233.         if(n != 2) off -= s->mb_stride;

  2234.         q2 = s->current_picture.qscale_table[off];

  2235.         if(q2 && q2 != q1)

  2236.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2237.     }

  2238. 

  2239.     if(a_avail && c_avail) {

  2240.         if(abs(a - b) <= abs(b - c)) {

  2241.             pred = c;

  2242.             *dir_ptr = 1;//left

  2243.         } else {

  2244.             pred = a;

  2245.             *dir_ptr = 0;//top

  2246.         }

  2247.     } else if(a_avail) {

  2248.         pred = a;

  2249.         *dir_ptr = 0;//top

  2250.     } else if(c_avail) {

  2251.         pred = c;

  2252.         *dir_ptr = 1;//left

  2253.     } else {

  2254.         pred = 0;

  2255.         *dir_ptr = 1;//left

  2256.     }

  2257. 

  2258.     /* update predictor */

  2259.     *dc_val_ptr = &dc_val[0];

  2260.     return pred;

  2261. }

  2262. 

  2263. /** @} */ // Block group

  2264. 

  2265. /**

  2266.  * @defgroup vc1_std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2267.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2268.  * @{

  2269.  */

  2270. 

  2271. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2272. {

  2273.     int xy, wrap, pred, a, b, c;

  2274. 

  2275.     xy = s->block_index[n];

  2276.     wrap = s->b8_stride;

  2277. 

  2278.     /* B C

  2279.      * A X

  2280.      */

  2281.     a = s->coded_block[xy - 1       ];

  2282.     b = s->coded_block[xy - 1 - wrap];

  2283.     c = s->coded_block[xy     - wrap];

  2284. 

  2285.     if (b == c) {

  2286.         pred = a;

  2287.     } else {

  2288.         pred = c;

  2289.     }

  2290. 

  2291.     /* store value */

  2292.     *coded_block_ptr = &s->coded_block[xy];

  2293. 

  2294.     return pred;

  2295. }

  2296. 

  2297. /**

  2298.  * Decode one AC coefficient

  2299.  * @param v The VC1 context

  2300.  * @param last Last coefficient

  2301.  * @param skip How much zero coefficients to skip

  2302.  * @param value Decoded AC coefficient value

  2303.  * @param codingset set of VLC to decode data

  2304.  * @see 8.1.3.4

  2305.  */

  2306. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2307. {

  2308.     GetBitContext *gb = &v->s.gb;

  2309.     int index, escape, run = 0, level = 0, lst = 0;

  2310. 

  2311.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2312.     if (index != vc1_ac_sizes[codingset] - 1) {

  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(get_bits1(gb))

  2317.             level = -level;

  2318.     } else {

  2319.         escape = decode210(gb);

  2320.         if (escape != 2) {

  2321.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2322.             run = vc1_index_decode_table[codingset][index][0];

  2323.             level = vc1_index_decode_table[codingset][index][1];

  2324.             lst = index >= vc1_last_decode_table[codingset];

  2325.             if(escape == 0) {

  2326.                 if(lst)

  2327.                     level += vc1_last_delta_level_table[codingset][run];

  2328.                 else

  2329.                     level += vc1_delta_level_table[codingset][run];

  2330.             } else {

  2331.                 if(lst)

  2332.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2333.                 else

  2334.                     run += vc1_delta_run_table[codingset][level] + 1;

  2335.             }

  2336.             if(get_bits1(gb))

  2337.                 level = -level;

  2338.         } else {

  2339.             int sign;

  2340.             lst = get_bits1(gb);

  2341.             if(v->s.esc3_level_length == 0) {

  2342.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2343.                     v->s.esc3_level_length = get_bits(gb, 3);

  2344.                     if(!v->s.esc3_level_length)

  2345.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2346.                 } else { //table 60

  2347.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2348.                 }

  2349.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2350.             }

  2351.             run = get_bits(gb, v->s.esc3_run_length);

  2352.             sign = get_bits1(gb);

  2353.             level = get_bits(gb, v->s.esc3_level_length);

  2354.             if(sign)

  2355.                 level = -level;

  2356.         }

  2357.     }

  2358. 

  2359.     *last = lst;

  2360.     *skip = run;

  2361.     *value = level;

  2362. }

  2363. 

  2364. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2365.  * @param v VC1Context

  2366.  * @param block block to decode

  2367.  * @param[in] n subblock index

  2368.  * @param coded are AC coeffs present or not

  2369.  * @param codingset set of VLC to decode data

  2370.  */

  2371. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2372. {

  2373.     GetBitContext *gb = &v->s.gb;

  2374.     MpegEncContext *s = &v->s;

  2375.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2376.     int run_diff, i;

  2377.     int16_t *dc_val;

  2378.     int16_t *ac_val, *ac_val2;

  2379.     int dcdiff;

  2380. 

  2381.     /* Get DC differential */

  2382.     if (n < 4) {

  2383.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2384.     } else {

  2385.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2386.     }

  2387.     if (dcdiff < 0){

  2388.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2389.         return -1;

  2390.     }

  2391.     if (dcdiff)

  2392.     {

  2393.         if (dcdiff == 119 /* ESC index value */)

  2394.         {

  2395.             /* TODO: Optimize */

  2396.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2397.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2398.             else dcdiff = get_bits(gb, 8);

  2399.         }

  2400.         else

  2401.         {

  2402.             if (v->pq == 1)

  2403.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2404.             else if (v->pq == 2)

  2405.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2406.         }

  2407.         if (get_bits1(gb))

  2408.             dcdiff = -dcdiff;

  2409.     }

  2410. 

  2411.     /* Prediction */

  2412.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2413.     *dc_val = dcdiff;

  2414. 

  2415.     /* Store the quantized DC coeff, used for prediction */

  2416.     if (n < 4) {

  2417.         block[0] = dcdiff * s->y_dc_scale;

  2418.     } else {

  2419.         block[0] = dcdiff * s->c_dc_scale;

  2420.     }

  2421.     /* Skip ? */

  2422.     run_diff = 0;

  2423.     i = 0;

  2424.     if (!coded) {

  2425.         goto not_coded;

  2426.     }

  2427. 

  2428.     //AC Decoding

  2429.     i = 1;

  2430. 

  2431.     {

  2432.         int last = 0, skip, value;

  2433.         const int8_t *zz_table;

  2434.         int scale;

  2435.         int k;

  2436. 

  2437.         scale = v->pq * 2 + v->halfpq;

  2438. 

  2439.         if(v->s.ac_pred) {

  2440.             if(!dc_pred_dir)

  2441.                 zz_table = wmv1_scantable[2];

  2442.             else

  2443.                 zz_table = wmv1_scantable[3];

  2444.         } else

  2445.             zz_table = wmv1_scantable[1];

  2446. 

  2447.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2448.         ac_val2 = ac_val;

  2449.         if(dc_pred_dir) //left

  2450.             ac_val -= 16;

  2451.         else //top

  2452.             ac_val -= 16 * s->block_wrap[n];

  2453. 

  2454.         while (!last) {

  2455.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2456.             i += skip;

  2457.             if(i > 63)

  2458.                 break;

  2459.             block[zz_table[i++]] = value;

  2460.         }

  2461. 

  2462.         /* apply AC prediction if needed */

  2463.         if(s->ac_pred) {

  2464.             if(dc_pred_dir) { //left

  2465.                 for(k = 1; k < 8; k++)

  2466.                     block[k << 3] += ac_val[k];

  2467.             } else { //top

  2468.                 for(k = 1; k < 8; k++)

  2469.                     block[k] += ac_val[k + 8];

  2470.             }

  2471.         }

  2472.         /* save AC coeffs for further prediction */

  2473.         for(k = 1; k < 8; k++) {

  2474.             ac_val2[k] = block[k << 3];

  2475.             ac_val2[k + 8] = block[k];

  2476.         }

  2477. 

  2478.         /* scale AC coeffs */

  2479.         for(k = 1; k < 64; k++)

  2480.             if(block[k]) {

  2481.                 block[k] *= scale;

  2482.                 if(!v->pquantizer)

  2483.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2484.             }

  2485. 

  2486.         if(s->ac_pred) i = 63;

  2487.     }

  2488. 

  2489. not_coded:

  2490.     if(!coded) {

  2491.         int k, scale;

  2492.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2493.         ac_val2 = ac_val;

  2494. 

  2495.         scale = v->pq * 2 + v->halfpq;

  2496.         memset(ac_val2, 0, 16 * 2);

  2497.         if(dc_pred_dir) {//left

  2498.             ac_val -= 16;

  2499.             if(s->ac_pred)

  2500.                 memcpy(ac_val2, ac_val, 8 * 2);

  2501.         } else {//top

  2502.             ac_val -= 16 * s->block_wrap[n];

  2503.             if(s->ac_pred)

  2504.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2505.         }

  2506. 

  2507.         /* apply AC prediction if needed */

  2508.         if(s->ac_pred) {

  2509.             if(dc_pred_dir) { //left

  2510.                 for(k = 1; k < 8; k++) {

  2511.                     block[k << 3] = ac_val[k] * scale;

  2512.                     if(!v->pquantizer && block[k << 3])

  2513.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2514.                 }

  2515.             } else { //top

  2516.                 for(k = 1; k < 8; k++) {

  2517.                     block[k] = ac_val[k + 8] * scale;

  2518.                     if(!v->pquantizer && block[k])

  2519.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2520.                 }

  2521.             }

  2522.             i = 63;

  2523.         }

  2524.     }

  2525.     s->block_last_index[n] = i;

  2526. 

  2527.     return 0;

  2528. }

  2529. 

  2530. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2531.  * @param v VC1Context

  2532.  * @param block block to decode

  2533.  * @param[in] n subblock number

  2534.  * @param coded are AC coeffs present or not

  2535.  * @param codingset set of VLC to decode data

  2536.  * @param mquant quantizer value for this macroblock

  2537.  */

  2538. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2539. {

  2540.     GetBitContext *gb = &v->s.gb;

  2541.     MpegEncContext *s = &v->s;

  2542.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2543.     int run_diff, i;

  2544.     int16_t *dc_val;

  2545.     int16_t *ac_val, *ac_val2;

  2546.     int dcdiff;

  2547.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2548.     int use_pred = s->ac_pred;

  2549.     int scale;

  2550.     int q1, q2 = 0;

  2551.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2552. 

  2553.     /* Get DC differential */

  2554.     if (n < 4) {

  2555.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2556.     } else {

  2557.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2558.     }

  2559.     if (dcdiff < 0){

  2560.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2561.         return -1;

  2562.     }

  2563.     if (dcdiff)

  2564.     {

  2565.         if (dcdiff == 119 /* ESC index value */)

  2566.         {

  2567.             /* TODO: Optimize */

  2568.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2569.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2570.             else dcdiff = get_bits(gb, 8);

  2571.         }

  2572.         else

  2573.         {

  2574.             if (mquant == 1)

  2575.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2576.             else if (mquant == 2)

  2577.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2578.         }

  2579.         if (get_bits1(gb))

  2580.             dcdiff = -dcdiff;

  2581.     }

  2582. 

  2583.     /* Prediction */

  2584.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2585.     *dc_val = dcdiff;

  2586. 

  2587.     /* Store the quantized DC coeff, used for prediction */

  2588.     if (n < 4) {

  2589.         block[0] = dcdiff * s->y_dc_scale;

  2590.     } else {

  2591.         block[0] = dcdiff * s->c_dc_scale;

  2592.     }

  2593.     /* Skip ? */

  2594.     run_diff = 0;

  2595.     i = 0;

  2596. 

  2597.     //AC Decoding

  2598.     i = 1;

  2599. 

  2600.     /* check if AC is needed at all */

  2601.     if(!a_avail && !c_avail) use_pred = 0;

  2602.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2603.     ac_val2 = ac_val;

  2604. 

  2605.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2606. 

  2607.     if(dc_pred_dir) //left

  2608.         ac_val -= 16;

  2609.     else //top

  2610.         ac_val -= 16 * s->block_wrap[n];

  2611. 

  2612.     q1 = s->current_picture.qscale_table[mb_pos];

  2613.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2614.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2615.     if(dc_pred_dir && n==1) q2 = q1;

  2616.     if(!dc_pred_dir && n==2) q2 = q1;

  2617.     if(n==3) q2 = q1;

  2618. 

  2619.     if(coded) {

  2620.         int last = 0, skip, value;

  2621.         const int8_t *zz_table;

  2622.         int k;

  2623. 

  2624.         if(v->s.ac_pred) {

  2625.             if(!dc_pred_dir)

  2626.                 zz_table = wmv1_scantable[2];

  2627.             else

  2628.                 zz_table = wmv1_scantable[3];

  2629.         } else

  2630.             zz_table = wmv1_scantable[1];

  2631. 

  2632.         while (!last) {

  2633.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2634.             i += skip;

  2635.             if(i > 63)

  2636.                 break;

  2637.             block[zz_table[i++]] = value;

  2638.         }

  2639. 

  2640.         /* apply AC prediction if needed */

  2641.         if(use_pred) {

  2642.             /* scale predictors if needed*/

  2643.             if(q2 && q1!=q2) {

  2644.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2645.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2646. 

  2647.                 if(dc_pred_dir) { //left

  2648.                     for(k = 1; k < 8; k++)

  2649.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2650.                 } else { //top

  2651.                     for(k = 1; k < 8; k++)

  2652.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2653.                 }

  2654.             } else {

  2655.                 if(dc_pred_dir) { //left

  2656.                     for(k = 1; k < 8; k++)

  2657.                         block[k << 3] += ac_val[k];

  2658.                 } else { //top

  2659.                     for(k = 1; k < 8; k++)

  2660.                         block[k] += ac_val[k + 8];

  2661.                 }

  2662.             }

  2663.         }

  2664.         /* save AC coeffs for further prediction */

  2665.         for(k = 1; k < 8; k++) {

  2666.             ac_val2[k] = block[k << 3];

  2667.             ac_val2[k + 8] = block[k];

  2668.         }

  2669. 

  2670.         /* scale AC coeffs */

  2671.         for(k = 1; k < 64; k++)

  2672.             if(block[k]) {

  2673.                 block[k] *= scale;

  2674.                 if(!v->pquantizer)

  2675.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2676.             }

  2677. 

  2678.         if(use_pred) i = 63;

  2679.     } else { // no AC coeffs

  2680.         int k;

  2681. 

  2682.         memset(ac_val2, 0, 16 * 2);

  2683.         if(dc_pred_dir) {//left

  2684.             if(use_pred) {

  2685.                 memcpy(ac_val2, ac_val, 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] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2691.                 }

  2692.             }

  2693.         } else {//top

  2694.             if(use_pred) {

  2695.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2696.                 if(q2 && q1!=q2) {

  2697.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2698.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2699.                     for(k = 1; k < 8; k++)

  2700.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2701.                 }

  2702.             }

  2703.         }

  2704. 

  2705.         /* apply AC prediction if needed */

  2706.         if(use_pred) {

  2707.             if(dc_pred_dir) { //left

  2708.                 for(k = 1; k < 8; k++) {

  2709.                     block[k << 3] = ac_val2[k] * scale;

  2710.                     if(!v->pquantizer && block[k << 3])

  2711.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2712.                 }

  2713.             } else { //top

  2714.                 for(k = 1; k < 8; k++) {

  2715.                     block[k] = ac_val2[k + 8] * scale;

  2716.                     if(!v->pquantizer && block[k])

  2717.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2718.                 }

  2719.             }

  2720.             i = 63;

  2721.         }

  2722.     }

  2723.     s->block_last_index[n] = i;

  2724. 

  2725.     return 0;

  2726. }

  2727. 

  2728. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2729.  * @param v VC1Context

  2730.  * @param block block to decode

  2731.  * @param[in] n subblock index

  2732.  * @param coded are AC coeffs present or not

  2733.  * @param mquant block quantizer

  2734.  * @param codingset set of VLC to decode data

  2735.  */

  2736. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2737. {

  2738.     GetBitContext *gb = &v->s.gb;

  2739.     MpegEncContext *s = &v->s;

  2740.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2741.     int run_diff, i;

  2742.     int16_t *dc_val;

  2743.     int16_t *ac_val, *ac_val2;

  2744.     int dcdiff;

  2745.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2746.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2747.     int use_pred = s->ac_pred;

  2748.     int scale;

  2749.     int q1, q2 = 0;

  2750. 

  2751.     /* XXX: Guard against dumb values of mquant */

  2752.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2753. 

  2754.     /* Set DC scale - y and c use the same */

  2755.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2756.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2757. 

  2758.     /* Get DC differential */

  2759.     if (n < 4) {

  2760.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2761.     } else {

  2762.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2763.     }

  2764.     if (dcdiff < 0){

  2765.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2766.         return -1;

  2767.     }

  2768.     if (dcdiff)

  2769.     {

  2770.         if (dcdiff == 119 /* ESC index value */)

  2771.         {

  2772.             /* TODO: Optimize */

  2773.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2774.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2775.             else dcdiff = get_bits(gb, 8);

  2776.         }

  2777.         else

  2778.         {

  2779.             if (mquant == 1)

  2780.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2781.             else if (mquant == 2)

  2782.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2783.         }

  2784.         if (get_bits1(gb))

  2785.             dcdiff = -dcdiff;

  2786.     }

  2787. 

  2788.     /* Prediction */

  2789.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2790.     *dc_val = dcdiff;

  2791. 

  2792.     /* Store the quantized DC coeff, used for prediction */

  2793. 

  2794.     if (n < 4) {

  2795.         block[0] = dcdiff * s->y_dc_scale;

  2796.     } else {

  2797.         block[0] = dcdiff * s->c_dc_scale;

  2798.     }

  2799.     /* Skip ? */

  2800.     run_diff = 0;

  2801.     i = 0;

  2802. 

  2803.     //AC Decoding

  2804.     i = 1;

  2805. 

  2806.     /* check if AC is needed at all and adjust direction if needed */

  2807.     if(!a_avail) dc_pred_dir = 1;

  2808.     if(!c_avail) dc_pred_dir = 0;

  2809.     if(!a_avail && !c_avail) use_pred = 0;

  2810.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2811.     ac_val2 = ac_val;

  2812. 

  2813.     scale = mquant * 2 + v->halfpq;

  2814. 

  2815.     if(dc_pred_dir) //left

  2816.         ac_val -= 16;

  2817.     else //top

  2818.         ac_val -= 16 * s->block_wrap[n];

  2819. 

  2820.     q1 = s->current_picture.qscale_table[mb_pos];

  2821.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2822.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2823.     if(dc_pred_dir && n==1) q2 = q1;

  2824.     if(!dc_pred_dir && n==2) q2 = q1;

  2825.     if(n==3) q2 = q1;

  2826. 

  2827.     if(coded) {

  2828.         int last = 0, skip, value;

  2829.         const int8_t *zz_table;

  2830.         int k;

  2831. 

  2832.         zz_table = wmv1_scantable[0];

  2833. 

  2834.         while (!last) {

  2835.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2836.             i += skip;

  2837.             if(i > 63)

  2838.                 break;

  2839.             block[zz_table[i++]] = value;

  2840.         }

  2841. 

  2842.         /* apply AC prediction if needed */

  2843.         if(use_pred) {

  2844.             /* scale predictors if needed*/

  2845.             if(q2 && q1!=q2) {

  2846.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2847.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2848. 

  2849.                 if(dc_pred_dir) { //left

  2850.                     for(k = 1; k < 8; k++)

  2851.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2852.                 } else { //top

  2853.                     for(k = 1; k < 8; k++)

  2854.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2855.                 }

  2856.             } else {

  2857.                 if(dc_pred_dir) { //left

  2858.                     for(k = 1; k < 8; k++)

  2859.                         block[k << 3] += ac_val[k];

  2860.                 } else { //top

  2861.                     for(k = 1; k < 8; k++)

  2862.                         block[k] += ac_val[k + 8];

  2863.                 }

  2864.             }

  2865.         }

  2866.         /* save AC coeffs for further prediction */

  2867.         for(k = 1; k < 8; k++) {

  2868.             ac_val2[k] = block[k << 3];

  2869.             ac_val2[k + 8] = block[k];

  2870.         }

  2871. 

  2872.         /* scale AC coeffs */

  2873.         for(k = 1; k < 64; k++)

  2874.             if(block[k]) {

  2875.                 block[k] *= scale;

  2876.                 if(!v->pquantizer)

  2877.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2878.             }

  2879. 

  2880.         if(use_pred) i = 63;

  2881.     } else { // no AC coeffs

  2882.         int k;

  2883. 

  2884.         memset(ac_val2, 0, 16 * 2);

  2885.         if(dc_pred_dir) {//left

  2886.             if(use_pred) {

  2887.                 memcpy(ac_val2, ac_val, 8 * 2);

  2888.                 if(q2 && q1!=q2) {

  2889.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2890.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2891.                     for(k = 1; k < 8; k++)

  2892.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2893.                 }

  2894.             }

  2895.         } else {//top

  2896.             if(use_pred) {

  2897.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2898.                 if(q2 && q1!=q2) {

  2899.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2900.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2901.                     for(k = 1; k < 8; k++)

  2902.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2903.                 }

  2904.             }

  2905.         }

  2906. 

  2907.         /* apply AC prediction if needed */

  2908.         if(use_pred) {

  2909.             if(dc_pred_dir) { //left

  2910.                 for(k = 1; k < 8; k++) {

  2911.                     block[k << 3] = ac_val2[k] * scale;

  2912.                     if(!v->pquantizer && block[k << 3])

  2913.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2914.                 }

  2915.             } else { //top

  2916.                 for(k = 1; k < 8; k++) {

  2917.                     block[k] = ac_val2[k + 8] * scale;

  2918.                     if(!v->pquantizer && block[k])

  2919.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2920.                 }

  2921.             }

  2922.             i = 63;

  2923.         }

  2924.     }

  2925.     s->block_last_index[n] = i;

  2926. 

  2927.     return 0;

  2928. }

  2929. 

  2930. /** Decode P block

  2931.  */

  2932. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,

  2933.                               uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left)

  2934. {

  2935.     MpegEncContext *s = &v->s;

  2936.     GetBitContext *gb = &s->gb;

  2937.     int i, j;

  2938.     int subblkpat = 0;

  2939.     int scale, off, idx, last, skip, value;

  2940.     int ttblk = ttmb & 7;

  2941.     int pat = 0;

  2942. 

  2943.     if(ttmb == -1) {

  2944.         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)];

  2945.     }

  2946.     if(ttblk == TT_4X4) {

  2947.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  2948.     }

  2949.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  2950.         subblkpat = decode012(gb);

  2951.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  2952.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  2953.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  2954.     }

  2955.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  2956. 

  2957.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  2958.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  2959.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  2960.         ttblk = TT_8X4;

  2961.     }

  2962.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  2963.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  2964.         ttblk = TT_4X8;

  2965.     }

  2966.     switch(ttblk) {

  2967.     case TT_8X8:

  2968.         pat = 0xF;

  2969.         i = 0;

  2970.         last = 0;

  2971.         while (!last) {

  2972.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2973.             i += skip;

  2974.             if(i > 63)

  2975.                 break;

  2976.             idx = wmv1_scantable[0][i++];

  2977.             block[idx] = value * scale;

  2978.             if(!v->pquantizer)

  2979.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  2980.         }

  2981.         if(!skip_block){

  2982.             s->dsp.vc1_inv_trans_8x8(block);

  2983.             s->dsp.add_pixels_clamped(block, dst, linesize);

  2984.             if(apply_filter && cbp_top  & 0xC)

  2985.                 s->dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  2986.             if(apply_filter && cbp_left & 0xA)

  2987.                 s->dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  2988.         }

  2989.         break;

  2990.     case TT_4X4:

  2991.         pat = ~subblkpat & 0xF;

  2992.         for(j = 0; j < 4; j++) {

  2993.             last = subblkpat & (1 << (3 - j));

  2994.             i = 0;

  2995.             off = (j & 1) * 4 + (j & 2) * 16;

  2996.             while (!last) {

  2997.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2998.                 i += skip;

  2999.                 if(i > 15)

  3000.                     break;

  3001.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3002.                 block[idx + off] = value * scale;

  3003.                 if(!v->pquantizer)

  3004.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3005.             }

  3006.             if(!(subblkpat & (1 << (3 - j))) && !skip_block){

  3007.                 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);

  3008.                 if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2)))))

  3009.                     s->dsp.vc1_v_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  3010.                 if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1)))))

  3011.                     s->dsp.vc1_h_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  3012.             }

  3013.         }

  3014.         break;

  3015.     case TT_8X4:

  3016.         pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF;

  3017.         for(j = 0; j < 2; j++) {

  3018.             last = subblkpat & (1 << (1 - j));

  3019.             i = 0;

  3020.             off = j * 32;

  3021.             while (!last) {

  3022.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3023.                 i += skip;

  3024.                 if(i > 31)

  3025.                     break;

  3026.                 idx = v->zz_8x4[i++]+off;

  3027.                 block[idx] = value * scale;

  3028.                 if(!v->pquantizer)

  3029.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3030.             }

  3031.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3032.                 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);

  3033.                 if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC))

  3034.                     s->dsp.vc1_v_loop_filter8(dst + j*4*linesize, linesize, v->pq);

  3035.                 if(apply_filter && cbp_left & (2 << j))

  3036.                     s->dsp.vc1_h_loop_filter4(dst + j*4*linesize, linesize, v->pq);

  3037.             }

  3038.         }

  3039.         break;

  3040.     case TT_4X8:

  3041.         pat = ~(subblkpat*5) & 0xF;

  3042.         for(j = 0; j < 2; j++) {

  3043.             last = subblkpat & (1 << (1 - j));

  3044.             i = 0;

  3045.             off = j * 4;

  3046.             while (!last) {

  3047.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3048.                 i += skip;

  3049.                 if(i > 31)

  3050.                     break;

  3051.                 idx = v->zz_4x8[i++]+off;

  3052.                 block[idx] = value * scale;

  3053.                 if(!v->pquantizer)

  3054.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3055.             }

  3056.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3057.                 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3058.                 if(apply_filter && cbp_top & (2 << j))

  3059.                     s->dsp.vc1_v_loop_filter4(dst + j*4, linesize, v->pq);

  3060.                 if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA))

  3061.                     s->dsp.vc1_h_loop_filter8(dst + j*4, linesize, v->pq);

  3062.             }

  3063.         }

  3064.         break;

  3065.     }

  3066.     return pat;

  3067. }

  3068. 

  3069. /** @} */ // Macroblock group

  3070. 

  3071. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3072. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3073. 

  3074. /** Decode one P-frame MB (in Simple/Main profile)

  3075.  */

  3076. static int vc1_decode_p_mb(VC1Context *v)

  3077. {

  3078.     MpegEncContext *s = &v->s;

  3079.     GetBitContext *gb = &s->gb;

  3080.     int i, j;

  3081.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3082.     int cbp; /* cbp decoding stuff */

  3083.     int mqdiff, mquant; /* MB quantization */

  3084.     int ttmb = v->ttfrm; /* MB Transform type */

  3085. 

  3086.     int mb_has_coeffs = 1; /* last_flag */

  3087.     int dmv_x, dmv_y; /* Differential MV components */

  3088.     int index, index1; /* LUT indexes */

  3089.     int val, sign; /* temp values */

  3090.     int first_block = 1;

  3091.     int dst_idx, off;

  3092.     int skipped, fourmv;

  3093.     int block_cbp = 0, pat;

  3094.     int apply_loop_filter;

  3095. 

  3096.     mquant = v->pq; /* Loosy initialization */

  3097. 

  3098.     if (v->mv_type_is_raw)

  3099.         fourmv = get_bits1(gb);

  3100.     else

  3101.         fourmv = v->mv_type_mb_plane[mb_pos];

  3102.     if (v->skip_is_raw)

  3103.         skipped = get_bits1(gb);

  3104.     else

  3105.         skipped = v->s.mbskip_table[mb_pos];

  3106. 

  3107.     s->dsp.clear_blocks(s->block[0]);

  3108. 

  3109.     apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  3110.     if (!fourmv) /* 1MV mode */

  3111.     {

  3112.         if (!skipped)

  3113.         {

  3114.             GET_MVDATA(dmv_x, dmv_y);

  3115. 

  3116.             if (s->mb_intra) {

  3117.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3118.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3119.             }

  3120.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3121.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3122. 

  3123.             /* FIXME Set DC val for inter block ? */

  3124.             if (s->mb_intra && !mb_has_coeffs)

  3125.             {

  3126.                 GET_MQUANT();

  3127.                 s->ac_pred = get_bits1(gb);

  3128.                 cbp = 0;

  3129.             }

  3130.             else if (mb_has_coeffs)

  3131.             {

  3132.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3133.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3134.                 GET_MQUANT();

  3135.             }

  3136.             else

  3137.             {

  3138.                 mquant = v->pq;

  3139.                 cbp = 0;

  3140.             }

  3141.             s->current_picture.qscale_table[mb_pos] = mquant;

  3142. 

  3143.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3144.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3145.                                 VC1_TTMB_VLC_BITS, 2);

  3146.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3147.             dst_idx = 0;

  3148.             for (i=0; i<6; i++)

  3149.             {

  3150.                 s->dc_val[0][s->block_index[i]] = 0;

  3151.                 dst_idx += i >> 2;

  3152.                 val = ((cbp >> (5 - i)) & 1);

  3153.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3154.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3155.                 if(s->mb_intra) {

  3156.                     /* check if prediction blocks A and C are available */

  3157.                     v->a_avail = v->c_avail = 0;

  3158.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3159.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3160.                     if(i == 1 || i == 3 || s->mb_x)

  3161.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3162. 

  3163.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3164.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3165.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3166.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3167.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3168.                     if(v->pq >= 9 && v->overlap) {

  3169.                         if(v->c_avail)

  3170.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3171.                         if(v->a_avail)

  3172.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3173.                     }

  3174.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3175.                         int left_cbp, top_cbp;

  3176.                         if(i & 4){

  3177.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3178.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3179.                         }else{

  3180.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3181.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3182.                         }

  3183.                         if(left_cbp & 0xC)

  3184.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3185.                         if(top_cbp  & 0xA)

  3186.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3187.                     }

  3188.                     block_cbp |= 0xF << (i << 2);

  3189.                 } else if(val) {

  3190.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3191.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3192.                         filter = 1;

  3193.                         if(i & 4){

  3194.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3195.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3196.                         }else{

  3197.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3198.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3199.                         }

  3200.                         if(left_cbp & 0xC)

  3201.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3202.                         if(top_cbp  & 0xA)

  3203.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3204.                     }

  3205.                     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);

  3206.                     block_cbp |= pat << (i << 2);

  3207.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3208.                     first_block = 0;

  3209.                 }

  3210.             }

  3211.         }

  3212.         else //Skipped

  3213.         {

  3214.             s->mb_intra = 0;

  3215.             for(i = 0; i < 6; i++) {

  3216.                 v->mb_type[0][s->block_index[i]] = 0;

  3217.                 s->dc_val[0][s->block_index[i]] = 0;

  3218.             }

  3219.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3220.             s->current_picture.qscale_table[mb_pos] = 0;

  3221.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3222.             vc1_mc_1mv(v, 0);

  3223.             return 0;

  3224.         }

  3225.     } //1MV mode

  3226.     else //4MV mode

  3227.     {

  3228.         if (!skipped /* unskipped MB */)

  3229.         {

  3230.             int intra_count = 0, coded_inter = 0;

  3231.             int is_intra[6], is_coded[6];

  3232.             /* Get CBPCY */

  3233.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3234.             for (i=0; i<6; i++)

  3235.             {

  3236.                 val = ((cbp >> (5 - i)) & 1);

  3237.                 s->dc_val[0][s->block_index[i]] = 0;

  3238.                 s->mb_intra = 0;

  3239.                 if(i < 4) {

  3240.                     dmv_x = dmv_y = 0;

  3241.                     s->mb_intra = 0;

  3242.                     mb_has_coeffs = 0;

  3243.                     if(val) {

  3244.                         GET_MVDATA(dmv_x, dmv_y);

  3245.                     }

  3246.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3247.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3248.                     intra_count += s->mb_intra;

  3249.                     is_intra[i] = s->mb_intra;

  3250.                     is_coded[i] = mb_has_coeffs;

  3251.                 }

  3252.                 if(i&4){

  3253.                     is_intra[i] = (intra_count >= 3);

  3254.                     is_coded[i] = val;

  3255.                 }

  3256.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3257.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3258.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3259.             }

  3260.             // if there are no coded blocks then don't do anything more

  3261.             if(!intra_count && !coded_inter) return 0;

  3262.             dst_idx = 0;

  3263.             GET_MQUANT();

  3264.             s->current_picture.qscale_table[mb_pos] = mquant;

  3265.             /* test if block is intra and has pred */

  3266.             {

  3267.                 int intrapred = 0;

  3268.                 for(i=0; i<6; i++)

  3269.                     if(is_intra[i]) {

  3270.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3271.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3272.                             intrapred = 1;

  3273.                             break;

  3274.                         }

  3275.                     }

  3276.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3277.                 else s->ac_pred = 0;

  3278.             }

  3279.             if (!v->ttmbf && coded_inter)

  3280.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3281.             for (i=0; i<6; i++)

  3282.             {

  3283.                 dst_idx += i >> 2;

  3284.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3285.                 s->mb_intra = is_intra[i];

  3286.                 if (is_intra[i]) {

  3287.                     /* check if prediction blocks A and C are available */

  3288.                     v->a_avail = v->c_avail = 0;

  3289.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3290.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3291.                     if(i == 1 || i == 3 || s->mb_x)

  3292.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3293. 

  3294.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3295.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3296.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3297.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3298.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3299.                     if(v->pq >= 9 && v->overlap) {

  3300.                         if(v->c_avail)

  3301.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3302.                         if(v->a_avail)

  3303.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3304.                     }

  3305.                     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)){

  3306.                         int left_cbp, top_cbp;

  3307.                         if(i & 4){

  3308.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3309.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3310.                         }else{

  3311.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3312.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3313.                         }

  3314.                         if(left_cbp & 0xC)

  3315.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3316.                         if(top_cbp  & 0xA)

  3317.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3318.                     }

  3319.                     block_cbp |= 0xF << (i << 2);

  3320.                 } else if(is_coded[i]) {

  3321.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3322.                     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)){

  3323.                         filter = 1;

  3324.                         if(i & 4){

  3325.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3326.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3327.                         }else{

  3328.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3329.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3330.                         }

  3331.                         if(left_cbp & 0xC)

  3332.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3333.                         if(top_cbp  & 0xA)

  3334.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3335.                     }

  3336.                     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);

  3337.                     block_cbp |= pat << (i << 2);

  3338.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3339.                     first_block = 0;

  3340.                 }

  3341.             }

  3342.             return 0;

  3343.         }

  3344.         else //Skipped MB

  3345.         {

  3346.             s->mb_intra = 0;

  3347.             s->current_picture.qscale_table[mb_pos] = 0;

  3348.             for (i=0; i<6; i++) {

  3349.                 v->mb_type[0][s->block_index[i]] = 0;

  3350.                 s->dc_val[0][s->block_index[i]] = 0;

  3351.             }

  3352.             for (i=0; i<4; i++)

  3353.             {

  3354.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3355.                 vc1_mc_4mv_luma(v, i);

  3356.             }

  3357.             vc1_mc_4mv_chroma(v);

  3358.             s->current_picture.qscale_table[mb_pos] = 0;

  3359.             return 0;

  3360.         }

  3361.     }

  3362.     v->cbp[s->mb_x] = block_cbp;

  3363. 

  3364.     /* Should never happen */

  3365.     return -1;

  3366. }

  3367. 

  3368. /** Decode one B-frame MB (in Main profile)

  3369.  */

  3370. static void vc1_decode_b_mb(VC1Context *v)

  3371. {

  3372.     MpegEncContext *s = &v->s;

  3373.     GetBitContext *gb = &s->gb;

  3374.     int i, j;

  3375.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3376.     int cbp = 0; /* cbp decoding stuff */

  3377.     int mqdiff, mquant; /* MB quantization */

  3378.     int ttmb = v->ttfrm; /* MB Transform type */

  3379.     int mb_has_coeffs = 0; /* last_flag */

  3380.     int index, index1; /* LUT indexes */

  3381.     int val, sign; /* temp values */

  3382.     int first_block = 1;

  3383.     int dst_idx, off;

  3384.     int skipped, direct;

  3385.     int dmv_x[2], dmv_y[2];

  3386.     int bmvtype = BMV_TYPE_BACKWARD;

  3387. 

  3388.     mquant = v->pq; /* Loosy initialization */

  3389.     s->mb_intra = 0;

  3390. 

  3391.     if (v->dmb_is_raw)

  3392.         direct = get_bits1(gb);

  3393.     else

  3394.         direct = v->direct_mb_plane[mb_pos];

  3395.     if (v->skip_is_raw)

  3396.         skipped = get_bits1(gb);

  3397.     else

  3398.         skipped = v->s.mbskip_table[mb_pos];

  3399. 

  3400.     s->dsp.clear_blocks(s->block[0]);

  3401.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3402.     for(i = 0; i < 6; i++) {

  3403.         v->mb_type[0][s->block_index[i]] = 0;

  3404.         s->dc_val[0][s->block_index[i]] = 0;

  3405.     }

  3406.     s->current_picture.qscale_table[mb_pos] = 0;

  3407. 

  3408.     if (!direct) {

  3409.         if (!skipped) {

  3410.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3411.             dmv_x[1] = dmv_x[0];

  3412.             dmv_y[1] = dmv_y[0];

  3413.         }

  3414.         if(skipped || !s->mb_intra) {

  3415.             bmvtype = decode012(gb);

  3416.             switch(bmvtype) {

  3417.             case 0:

  3418.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3419.                 break;

  3420.             case 1:

  3421.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3422.                 break;

  3423.             case 2:

  3424.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3425.                 dmv_x[0] = dmv_y[0] = 0;

  3426.             }

  3427.         }

  3428.     }

  3429.     for(i = 0; i < 6; i++)

  3430.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3431. 

  3432.     if (skipped) {

  3433.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3434.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3435.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3436.         return;

  3437.     }

  3438.     if (direct) {

  3439.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3440.         GET_MQUANT();

  3441.         s->mb_intra = 0;

  3442.         mb_has_coeffs = 0;

  3443.         s->current_picture.qscale_table[mb_pos] = mquant;

  3444.         if(!v->ttmbf)

  3445.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3446.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3447.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3448.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3449.     } else {

  3450.         if(!mb_has_coeffs && !s->mb_intra) {

  3451.             /* no coded blocks - effectively skipped */

  3452.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3453.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3454.             return;

  3455.         }

  3456.         if(s->mb_intra && !mb_has_coeffs) {

  3457.             GET_MQUANT();

  3458.             s->current_picture.qscale_table[mb_pos] = mquant;

  3459.             s->ac_pred = get_bits1(gb);

  3460.             cbp = 0;

  3461.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3462.         } else {

  3463.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3464.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3465.                 if(!mb_has_coeffs) {

  3466.                     /* interpolated skipped block */

  3467.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3468.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3469.                     return;

  3470.                 }

  3471.             }

  3472.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3473.             if(!s->mb_intra) {

  3474.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3475.             }

  3476.             if(s->mb_intra)

  3477.                 s->ac_pred = get_bits1(gb);

  3478.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3479.             GET_MQUANT();

  3480.             s->current_picture.qscale_table[mb_pos] = mquant;

  3481.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3482.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3483.         }

  3484.     }

  3485.     dst_idx = 0;

  3486.     for (i=0; i<6; i++)

  3487.     {

  3488.         s->dc_val[0][s->block_index[i]] = 0;

  3489.         dst_idx += i >> 2;

  3490.         val = ((cbp >> (5 - i)) & 1);

  3491.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3492.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3493.         if(s->mb_intra) {

  3494.             /* check if prediction blocks A and C are available */

  3495.             v->a_avail = v->c_avail = 0;

  3496.             if(i == 2 || i == 3 || !s->first_slice_line)

  3497.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3498.             if(i == 1 || i == 3 || s->mb_x)

  3499.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3500. 

  3501.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3502.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3503.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3504.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3505.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3506.         } else if(val) {

  3507.             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);

  3508.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3509.             first_block = 0;

  3510.         }

  3511.     }

  3512. }

  3513. 

  3514. /** Decode blocks of I-frame

  3515.  */

  3516. static void vc1_decode_i_blocks(VC1Context *v)

  3517. {

  3518.     int k, j;

  3519.     MpegEncContext *s = &v->s;

  3520.     int cbp, val;

  3521.     uint8_t *coded_val;

  3522.     int mb_pos;

  3523. 

  3524.     /* select codingmode used for VLC tables selection */

  3525.     switch(v->y_ac_table_index){

  3526.     case 0:

  3527.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3528.         break;

  3529.     case 1:

  3530.         v->codingset = CS_HIGH_MOT_INTRA;

  3531.         break;

  3532.     case 2:

  3533.         v->codingset = CS_MID_RATE_INTRA;

  3534.         break;

  3535.     }

  3536. 

  3537.     switch(v->c_ac_table_index){

  3538.     case 0:

  3539.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3540.         break;

  3541.     case 1:

  3542.         v->codingset2 = CS_HIGH_MOT_INTER;

  3543.         break;

  3544.     case 2:

  3545.         v->codingset2 = CS_MID_RATE_INTER;

  3546.         break;

  3547.     }

  3548. 

  3549.     /* Set DC scale - y and c use the same */

  3550.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3551.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3552. 

  3553.     //do frame decode

  3554.     s->mb_x = s->mb_y = 0;

  3555.     s->mb_intra = 1;

  3556.     s->first_slice_line = 1;

  3557.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3558.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3559.             ff_init_block_index(s);

  3560.             ff_update_block_index(s);

  3561.             s->dsp.clear_blocks(s->block[0]);

  3562.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3563.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3564.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3565.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3566.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3567. 

  3568.             // do actual MB decoding and displaying

  3569.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3570.             v->s.ac_pred = get_bits1(&v->s.gb);

  3571. 

  3572.             for(k = 0; k < 6; k++) {

  3573.                 val = ((cbp >> (5 - k)) & 1);

  3574. 

  3575.                 if (k < 4) {

  3576.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3577.                     val = val ^ pred;

  3578.                     *coded_val = val;

  3579.                 }

  3580.                 cbp |= val << (5 - k);

  3581. 

  3582.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3583. 

  3584.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3585.                 if(v->pq >= 9 && v->overlap) {

  3586.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3587.                 }

  3588.             }

  3589. 

  3590.             vc1_put_block(v, s->block);

  3591.             if(v->pq >= 9 && v->overlap) {

  3592.                 if(s->mb_x) {

  3593.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3594.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3595.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3596.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3597.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3598.                     }

  3599.                 }

  3600.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3601.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3602.                 if(!s->first_slice_line) {

  3603.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3604.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3605.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3606.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3607.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3608.                     }

  3609.                 }

  3610.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3611.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3612.             }

  3613.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3614. 

  3615.             if(get_bits_count(&s->gb) > v->bits) {

  3616.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3617.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3618.                 return;

  3619.             }

  3620.         }

  3621.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3622.         s->first_slice_line = 0;

  3623.     }

  3624.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3625. }

  3626. 

  3627. /** Decode blocks of I-frame for advanced profile

  3628.  */

  3629. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3630. {

  3631.     int k, j;

  3632.     MpegEncContext *s = &v->s;

  3633.     int cbp, val;

  3634.     uint8_t *coded_val;

  3635.     int mb_pos;

  3636.     int mquant = v->pq;

  3637.     int mqdiff;

  3638.     int overlap;

  3639.     GetBitContext *gb = &s->gb;

  3640. 

  3641.     /* select codingmode used for VLC tables selection */

  3642.     switch(v->y_ac_table_index){

  3643.     case 0:

  3644.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3645.         break;

  3646.     case 1:

  3647.         v->codingset = CS_HIGH_MOT_INTRA;

  3648.         break;

  3649.     case 2:

  3650.         v->codingset = CS_MID_RATE_INTRA;

  3651.         break;

  3652.     }

  3653. 

  3654.     switch(v->c_ac_table_index){

  3655.     case 0:

  3656.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3657.         break;

  3658.     case 1:

  3659.         v->codingset2 = CS_HIGH_MOT_INTER;

  3660.         break;

  3661.     case 2:

  3662.         v->codingset2 = CS_MID_RATE_INTER;

  3663.         break;

  3664.     }

  3665. 

  3666.     //do frame decode

  3667.     s->mb_x = s->mb_y = 0;

  3668.     s->mb_intra = 1;

  3669.     s->first_slice_line = 1;

  3670.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3671.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3672.             ff_init_block_index(s);

  3673.             ff_update_block_index(s);

  3674.             s->dsp.clear_blocks(s->block[0]);

  3675.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3676.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3677.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3678.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3679. 

  3680.             // do actual MB decoding and displaying

  3681.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3682.             if(v->acpred_is_raw)

  3683.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3684.             else

  3685.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3686. 

  3687.             if(v->condover == CONDOVER_SELECT) {

  3688.                 if(v->overflg_is_raw)

  3689.                     overlap = get_bits1(&v->s.gb);

  3690.                 else

  3691.                     overlap = v->over_flags_plane[mb_pos];

  3692.             } else

  3693.                 overlap = (v->condover == CONDOVER_ALL);

  3694. 

  3695.             GET_MQUANT();

  3696. 

  3697.             s->current_picture.qscale_table[mb_pos] = mquant;

  3698.             /* Set DC scale - y and c use the same */

  3699.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3700.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3701. 

  3702.             for(k = 0; k < 6; k++) {

  3703.                 val = ((cbp >> (5 - k)) & 1);

  3704. 

  3705.                 if (k < 4) {

  3706.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3707.                     val = val ^ pred;

  3708.                     *coded_val = val;

  3709.                 }

  3710.                 cbp |= val << (5 - k);

  3711. 

  3712.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3713.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3714. 

  3715.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3716. 

  3717.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3718.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3719.             }

  3720. 

  3721.             vc1_put_block(v, s->block);

  3722.             if(overlap) {

  3723.                 if(s->mb_x) {

  3724.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3725.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3726.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3727.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3728.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3729.                     }

  3730.                 }

  3731.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3732.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3733.                 if(!s->first_slice_line) {

  3734.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3735.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3736.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3737.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3738.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3739.                     }

  3740.                 }

  3741.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3742.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3743.             }

  3744.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3745. 

  3746.             if(get_bits_count(&s->gb) > v->bits) {

  3747.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3748.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3749.                 return;

  3750.             }

  3751.         }

  3752.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3753.         s->first_slice_line = 0;

  3754.     }

  3755.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3756. }

  3757. 

  3758. static void vc1_decode_p_blocks(VC1Context *v)

  3759. {

  3760.     MpegEncContext *s = &v->s;

  3761. 

  3762.     /* select codingmode used for VLC tables selection */

  3763.     switch(v->c_ac_table_index){

  3764.     case 0:

  3765.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3766.         break;

  3767.     case 1:

  3768.         v->codingset = CS_HIGH_MOT_INTRA;

  3769.         break;

  3770.     case 2:

  3771.         v->codingset = CS_MID_RATE_INTRA;

  3772.         break;

  3773.     }

  3774. 

  3775.     switch(v->c_ac_table_index){

  3776.     case 0:

  3777.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3778.         break;

  3779.     case 1:

  3780.         v->codingset2 = CS_HIGH_MOT_INTER;

  3781.         break;

  3782.     case 2:

  3783.         v->codingset2 = CS_MID_RATE_INTER;

  3784.         break;

  3785.     }

  3786. 

  3787.     s->first_slice_line = 1;

  3788.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  3789.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3790.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3791.             ff_init_block_index(s);

  3792.             ff_update_block_index(s);

  3793.             s->dsp.clear_blocks(s->block[0]);

  3794. 

  3795.             vc1_decode_p_mb(v);

  3796.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3797.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3798.                 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);

  3799.                 return;

  3800.             }

  3801.         }

  3802.         memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride);

  3803.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3804.         s->first_slice_line = 0;

  3805.     }

  3806.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3807. }

  3808. 

  3809. static void vc1_decode_b_blocks(VC1Context *v)

  3810. {

  3811.     MpegEncContext *s = &v->s;

  3812. 

  3813.     /* select codingmode used for VLC tables selection */

  3814.     switch(v->c_ac_table_index){

  3815.     case 0:

  3816.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3817.         break;

  3818.     case 1:

  3819.         v->codingset = CS_HIGH_MOT_INTRA;

  3820.         break;

  3821.     case 2:

  3822.         v->codingset = CS_MID_RATE_INTRA;

  3823.         break;

  3824.     }

  3825. 

  3826.     switch(v->c_ac_table_index){

  3827.     case 0:

  3828.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3829.         break;

  3830.     case 1:

  3831.         v->codingset2 = CS_HIGH_MOT_INTER;

  3832.         break;

  3833.     case 2:

  3834.         v->codingset2 = CS_MID_RATE_INTER;

  3835.         break;

  3836.     }

  3837. 

  3838.     s->first_slice_line = 1;

  3839.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3840.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3841.             ff_init_block_index(s);

  3842.             ff_update_block_index(s);

  3843.             s->dsp.clear_blocks(s->block[0]);

  3844. 

  3845.             vc1_decode_b_mb(v);

  3846.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3847.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3848.                 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);

  3849.                 return;

  3850.             }

  3851.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3852.         }

  3853.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3854.         s->first_slice_line = 0;

  3855.     }

  3856.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3857. }

  3858. 

  3859. static void vc1_decode_skip_blocks(VC1Context *v)

  3860. {

  3861.     MpegEncContext *s = &v->s;

  3862. 

  3863.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3864.     s->first_slice_line = 1;

  3865.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3866.         s->mb_x = 0;

  3867.         ff_init_block_index(s);

  3868.         ff_update_block_index(s);

  3869.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3870.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3871.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3872.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3873.         s->first_slice_line = 0;

  3874.     }

  3875.     s->pict_type = FF_P_TYPE;

  3876. }

  3877. 

  3878. static void vc1_decode_blocks(VC1Context *v)

  3879. {

  3880. 

  3881.     v->s.esc3_level_length = 0;

  3882.     if(v->x8_type){

  3883.         ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );

  3884.     }else{

  3885. 

  3886.         switch(v->s.pict_type) {

  3887.         case FF_I_TYPE:

  3888.             if(v->profile == PROFILE_ADVANCED)

  3889.                 vc1_decode_i_blocks_adv(v);

  3890.             else

  3891.                 vc1_decode_i_blocks(v);

  3892.             break;

  3893.         case FF_P_TYPE:

  3894.             if(v->p_frame_skipped)

  3895.                 vc1_decode_skip_blocks(v);

  3896.             else

  3897.                 vc1_decode_p_blocks(v);

  3898.             break;

  3899.         case FF_B_TYPE:

  3900.             if(v->bi_type){

  3901.                 if(v->profile == PROFILE_ADVANCED)

  3902.                     vc1_decode_i_blocks_adv(v);

  3903.                 else

  3904.                     vc1_decode_i_blocks(v);

  3905.             }else

  3906.                 vc1_decode_b_blocks(v);

  3907.             break;

  3908.         }

  3909.     }

  3910. }

  3911. 

  3912. /** Find VC-1 marker in buffer

  3913.  * @return position where next marker starts or end of buffer if no marker found

  3914.  */

  3915. static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)

  3916. {

  3917.     uint32_t mrk = 0xFFFFFFFF;

  3918. 

  3919.     if(end-src < 4) return end;

  3920.     while(src < end){

  3921.         mrk = (mrk << 8) | *src++;

  3922.         if(IS_MARKER(mrk))

  3923.             return src-4;

  3924.     }

  3925.     return end;

  3926. }

  3927. 

  3928. static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)

  3929. {

  3930.     int dsize = 0, i;

  3931. 

  3932.     if(size < 4){

  3933.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  3934.         return size;

  3935.     }

  3936.     for(i = 0; i < size; i++, src++) {

  3937.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  3938.             dst[dsize++] = src[1];

  3939.             src++;

  3940.             i++;

  3941.         } else

  3942.             dst[dsize++] = *src;

  3943.     }

  3944.     return dsize;

  3945. }

  3946. 

  3947. /** Initialize a VC1/WMV3 decoder

  3948.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3949.  * @todo TODO: Decypher remaining bits in extra_data

  3950.  */

  3951. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  3952. {

  3953.     VC1Context *v = avctx->priv_data;

  3954.     MpegEncContext *s = &v->s;

  3955.     GetBitContext gb;

  3956. 

  3957.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  3958.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  3959.         avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);

  3960.     else

  3961.         avctx->pix_fmt = PIX_FMT_GRAY8;

  3962.     avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);

  3963.     v->s.avctx = avctx;

  3964.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  3965.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  3966. 

  3967.     if(avctx->idct_algo==FF_IDCT_AUTO){

  3968.         avctx->idct_algo=FF_IDCT_WMV2;

  3969.     }

  3970. 

  3971.     if(ff_h263_decode_init(avctx) < 0)

  3972.         return -1;

  3973.     if (vc1_init_common(v) < 0) return -1;

  3974. 

  3975.     avctx->coded_width = avctx->width;

  3976.     avctx->coded_height = avctx->height;

  3977.     if (avctx->codec_id == CODEC_ID_WMV3)

  3978.     {

  3979.         int count = 0;

  3980. 

  3981.         // looks like WMV3 has a sequence header stored in the extradata

  3982.         // advanced sequence header may be before the first frame

  3983.         // the last byte of the extradata is a version number, 1 for the

  3984.         // samples we can decode

  3985. 

  3986.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  3987. 

  3988.         if (decode_sequence_header(avctx, &gb) < 0)

  3989.           return -1;

  3990. 

  3991.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  3992.         if (count>0)

  3993.         {

  3994.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  3995.                    count, get_bits(&gb, count));

  3996.         }

  3997.         else if (count < 0)

  3998.         {

  3999.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  4000.         }

  4001.     } else { // VC1/WVC1

  4002.         const uint8_t *start = avctx->extradata;

  4003.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  4004.         const uint8_t *next;

  4005.         int size, buf2_size;

  4006.         uint8_t *buf2 = NULL;

  4007.         int seq_initialized = 0, ep_initialized = 0;

  4008. 

  4009.         if(avctx->extradata_size < 16) {

  4010.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  4011.             return -1;

  4012.         }

  4013. 

  4014.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4015.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  4016.         next = start;

  4017.         for(; next < end; start = next){

  4018.             next = find_next_marker(start + 4, end);

  4019.             size = next - start - 4;

  4020.             if(size <= 0) continue;

  4021.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  4022.             init_get_bits(&gb, buf2, buf2_size * 8);

  4023.             switch(AV_RB32(start)){

  4024.             case VC1_CODE_SEQHDR:

  4025.                 if(decode_sequence_header(avctx, &gb) < 0){

  4026.                     av_free(buf2);

  4027.                     return -1;

  4028.                 }

  4029.                 seq_initialized = 1;

  4030.                 break;

  4031.             case VC1_CODE_ENTRYPOINT:

  4032.                 if(decode_entry_point(avctx, &gb) < 0){

  4033.                     av_free(buf2);

  4034.                     return -1;

  4035.                 }

  4036.                 ep_initialized = 1;

  4037.                 break;

  4038.             }

  4039.         }

  4040.         av_free(buf2);

  4041.         if(!seq_initialized || !ep_initialized){

  4042.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4043.             return -1;

  4044.         }

  4045.     }

  4046.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4047.     s->low_delay = !avctx->has_b_frames;

  4048. 

  4049.     s->mb_width = (avctx->coded_width+15)>>4;

  4050.     s->mb_height = (avctx->coded_height+15)>>4;

  4051. 

  4052.     /* Allocate mb bitplanes */

  4053.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4054.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4055.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4056.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4057. 

  4058.     v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  4059.     v->cbp = v->cbp_base + s->mb_stride;

  4060. 

  4061.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4062.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4063.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4064.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4065.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4066. 

  4067.     /* Init coded blocks info */

  4068.     if (v->profile == PROFILE_ADVANCED)

  4069.     {

  4070. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4071. //            return -1;

  4072. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4073. //            return -1;

  4074.     }

  4075. 

  4076.     ff_intrax8_common_init(&v->x8,s);

  4077.     return 0;

  4078. }

  4079. 

  4080. 

  4081. /** Decode a VC1/WMV3 frame

  4082.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4083.  */

  4084. static int vc1_decode_frame(AVCodecContext *avctx,

  4085.                             void *data, int *data_size,

  4086.                             AVPacket *avpkt)

  4087. {

  4088.     const uint8_t *buf = avpkt->data;

  4089.     int buf_size = avpkt->size;

  4090.     VC1Context *v = avctx->priv_data;

  4091.     MpegEncContext *s = &v->s;

  4092.     AVFrame *pict = data;

  4093.     uint8_t *buf2 = NULL;

  4094.     const uint8_t *buf_start = buf;

  4095. 

  4096.     /* no supplementary picture */

  4097.     if (buf_size == 0) {

  4098.         /* special case for last picture */

  4099.         if (s->low_delay==0 && s->next_picture_ptr) {

  4100.             *pict= *(AVFrame*)s->next_picture_ptr;

  4101.             s->next_picture_ptr= NULL;

  4102. 

  4103.             *data_size = sizeof(AVFrame);

  4104.         }

  4105. 

  4106.         return 0;

  4107.     }

  4108. 

  4109.     /* We need to set current_picture_ptr before reading the header,

  4110.      * otherwise we cannot store anything in there. */

  4111.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4112.         int i= ff_find_unused_picture(s, 0);

  4113.         s->current_picture_ptr= &s->picture[i];

  4114.     }

  4115. 

  4116.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){

  4117.         if (v->profile < PROFILE_ADVANCED)

  4118.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  4119.         else

  4120.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  4121.     }

  4122. 

  4123.     //for advanced profile we may need to parse and unescape data

  4124.     if (avctx->codec_id == CODEC_ID_VC1) {

  4125.         int buf_size2 = 0;

  4126.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4127. 

  4128.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4129.             const uint8_t *start, *end, *next;

  4130.             int size;

  4131. 

  4132.             next = buf;

  4133.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4134.                 next = find_next_marker(start + 4, end);

  4135.                 size = next - start - 4;

  4136.                 if(size <= 0) continue;

  4137.                 switch(AV_RB32(start)){

  4138.                 case VC1_CODE_FRAME:

  4139.                     if (avctx->hwaccel ||

  4140.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4141.                         buf_start = start;

  4142.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4143.                     break;

  4144.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4145.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4146.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4147.                     decode_entry_point(avctx, &s->gb);

  4148.                     break;

  4149.                 case VC1_CODE_SLICE:

  4150.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4151.                     av_free(buf2);

  4152.                     return -1;

  4153.                 }

  4154.             }

  4155.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4156.             const uint8_t *divider;

  4157. 

  4158.             divider = find_next_marker(buf, buf + buf_size);

  4159.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4160.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4161.                 av_free(buf2);

  4162.                 return -1;

  4163.             }

  4164. 

  4165.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4166.             // TODO

  4167.             av_free(buf2);return -1;

  4168.         }else{

  4169.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4170.         }

  4171.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4172.     } else

  4173.         init_get_bits(&s->gb, buf, buf_size*8);

  4174.     // do parse frame header

  4175.     if(v->profile < PROFILE_ADVANCED) {

  4176.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4177.             av_free(buf2);

  4178.             return -1;

  4179.         }

  4180.     } else {

  4181.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4182.             av_free(buf2);

  4183.             return -1;

  4184.         }

  4185.     }

  4186. 

  4187.     if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){

  4188.         av_free(buf2);

  4189.         return -1;

  4190.     }

  4191. 

  4192.     // for hurry_up==5

  4193.     s->current_picture.pict_type= s->pict_type;

  4194.     s->current_picture.key_frame= s->pict_type == FF_I_TYPE;

  4195. 

  4196.     /* skip B-frames if we don't have reference frames */

  4197.     if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){

  4198.         av_free(buf2);

  4199.         return -1;//buf_size;

  4200.     }

  4201.     /* skip b frames if we are in a hurry */

  4202.     if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;

  4203.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)

  4204.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)

  4205.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4206.         av_free(buf2);

  4207.         return buf_size;

  4208.     }

  4209.     /* skip everything if we are in a hurry>=5 */

  4210.     if(avctx->hurry_up>=5) {

  4211.         av_free(buf2);

  4212.         return -1;//buf_size;

  4213.     }

  4214. 

  4215.     if(s->next_p_frame_damaged){

  4216.         if(s->pict_type==FF_B_TYPE)

  4217.             return buf_size;

  4218.         else

  4219.             s->next_p_frame_damaged=0;

  4220.     }

  4221. 

  4222.     if(MPV_frame_start(s, avctx) < 0) {

  4223.         av_free(buf2);

  4224.         return -1;

  4225.     }

  4226. 

  4227.     s->me.qpel_put= s->dsp.put_qpel_pixels_tab;

  4228.     s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;

  4229. 

  4230.     if ((CONFIG_VC1_VDPAU_DECODER || CONFIG_WMV3_VDPAU_DECODER)

  4231.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4232.         ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  4233.     else if (avctx->hwaccel) {

  4234.         if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)

  4235.             return -1;

  4236.         if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  4237.             return -1;

  4238.         if (avctx->hwaccel->end_frame(avctx) < 0)

  4239.             return -1;

  4240.     } else {

  4241.         ff_er_frame_start(s);

  4242. 

  4243.         v->bits = buf_size * 8;

  4244.         vc1_decode_blocks(v);

  4245. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4246. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4247. //      return -1;

  4248.         ff_er_frame_end(s);

  4249.     }

  4250. 

  4251.     MPV_frame_end(s);

  4252. 

  4253. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4254. assert(s->current_picture.pict_type == s->pict_type);

  4255.     if (s->pict_type == FF_B_TYPE || s->low_delay) {

  4256.         *pict= *(AVFrame*)s->current_picture_ptr;

  4257.     } else if (s->last_picture_ptr != NULL) {

  4258.         *pict= *(AVFrame*)s->last_picture_ptr;

  4259.     }

  4260. 

  4261.     if(s->last_picture_ptr || s->low_delay){

  4262.         *data_size = sizeof(AVFrame);

  4263.         ff_print_debug_info(s, pict);

  4264.     }

  4265. 

  4266.     /* Return the Picture timestamp as the frame number */

  4267.     /* we subtract 1 because it is added on utils.c     */

  4268.     avctx->frame_number = s->picture_number - 1;

  4269. 

  4270.     av_free(buf2);

  4271.     return buf_size;

  4272. }

  4273. 

  4274. 

  4275. /** Close a VC1/WMV3 decoder

  4276.  * @warning Initial try at using MpegEncContext stuff

  4277.  */

  4278. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  4279. {

  4280.     VC1Context *v = avctx->priv_data;

  4281. 

  4282.     av_freep(&v->hrd_rate);

  4283.     av_freep(&v->hrd_buffer);

  4284.     MPV_common_end(&v->s);

  4285.     av_freep(&v->mv_type_mb_plane);

  4286.     av_freep(&v->direct_mb_plane);

  4287.     av_freep(&v->acpred_plane);

  4288.     av_freep(&v->over_flags_plane);

  4289.     av_freep(&v->mb_type_base);

  4290.     av_freep(&v->cbp_base);

  4291.     ff_intrax8_common_end(&v->x8);

  4292.     return 0;

  4293. }

  4294. 

  4295. 

  4296. AVCodec vc1_decoder = {

  4297.     "vc1",

  4298.     CODEC_TYPE_VIDEO,

  4299.     CODEC_ID_VC1,

  4300.     sizeof(VC1Context),

  4301.     vc1_decode_init,

  4302.     NULL,

  4303.     vc1_decode_end,

  4304.     vc1_decode_frame,

  4305.     CODEC_CAP_DELAY,

  4306.     NULL,

  4307.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  4308.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4309. };

  4310. 

  4311. AVCodec wmv3_decoder = {

  4312.     "wmv3",

  4313.     CODEC_TYPE_VIDEO,

  4314.     CODEC_ID_WMV3,

  4315.     sizeof(VC1Context),

  4316.     vc1_decode_init,

  4317.     NULL,

  4318.     vc1_decode_end,

  4319.     vc1_decode_frame,

  4320.     CODEC_CAP_DELAY,

  4321.     NULL,

  4322.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  4323.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4324. };

  4325. 

  4326. #if CONFIG_WMV3_VDPAU_DECODER

  4327. AVCodec wmv3_vdpau_decoder = {

  4328.     "wmv3_vdpau",

  4329.     CODEC_TYPE_VIDEO,

  4330.     CODEC_ID_WMV3,

  4331.     sizeof(VC1Context),

  4332.     vc1_decode_init,

  4333.     NULL,

  4334.     vc1_decode_end,

  4335.     vc1_decode_frame,

  4336.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4337.     NULL,

  4338.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  4339.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_WMV3, PIX_FMT_NONE}

  4340. };

  4341. #endif

  4342. 

  4343. #if CONFIG_VC1_VDPAU_DECODER

  4344. AVCodec vc1_vdpau_decoder = {

  4345.     "vc1_vdpau",

  4346.     CODEC_TYPE_VIDEO,

  4347.     CODEC_ID_VC1,

  4348.     sizeof(VC1Context),

  4349.     vc1_decode_init,

  4350.     NULL,

  4351.     vc1_decode_end,

  4352.     vc1_decode_frame,

  4353.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4354.     NULL,

  4355.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  4356.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_VC1, PIX_FMT_NONE}

  4357. };

  4358. #endif