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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 vc1.c

  25.  * VC-1 and WMV3 decoder

  26.  *

  27.  */

  28. #include "dsputil.h"

  29. #include "avcodec.h"

  30. #include "mpegvideo.h"

  31. #include "vc1.h"

  32. #include "vc1data.h"

  33. #include "vc1acdata.h"

  34. #include "msmpeg4data.h"

  35. #include "unary.h"

  36. #include "simple_idct.h"

  37. #include "mathops.h"

  38. #include "vdpau_internal.h"

  39. 

  40. #undef NDEBUG

  41. #include <assert.h>

  42. 

  43. #define MB_INTRA_VLC_BITS 9

  44. #define DC_VLC_BITS 9

  45. #define AC_VLC_BITS 9

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

  47. 

  48. 

  49. /**

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

  51.  * @param v The VC1Context to initialize

  52.  * @return Status

  53.  */

  54. static int vc1_init_common(VC1Context *v)

  55. {

  56.     static int done = 0;

  57.     int i = 0;

  58. 

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

  60. 

  61.     /* VLC tables */

  62.     if(!done)

  63.     {

  64.         done = 1;

  65.         init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  66.                  ff_vc1_bfraction_bits, 1, 1,

  67.                  ff_vc1_bfraction_codes, 1, 1, 1);

  68.         init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  69.                  ff_vc1_norm2_bits, 1, 1,

  70.                  ff_vc1_norm2_codes, 1, 1, 1);

  71.         init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  72.                  ff_vc1_norm6_bits, 1, 1,

  73.                  ff_vc1_norm6_codes, 2, 2, 1);

  74.         init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  75.                  ff_vc1_imode_bits, 1, 1,

  76.                  ff_vc1_imode_codes, 1, 1, 1);

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

  78.         {

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

  80.                      ff_vc1_ttmb_bits[i], 1, 1,

  81.                      ff_vc1_ttmb_codes[i], 2, 2, 1);

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

  83.                      ff_vc1_ttblk_bits[i], 1, 1,

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

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

  86.                      ff_vc1_subblkpat_bits[i], 1, 1,

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

  88.         }

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

  90.         {

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

  92.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

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

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

  95.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

  96.                      ff_vc1_cbpcy_p_codes[i], 2, 2, 1);

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

  98.                      ff_vc1_mv_diff_bits[i], 1, 1,

  99.                      ff_vc1_mv_diff_codes[i], 2, 2, 1);

  100.         }

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

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

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

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

  105.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

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

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

  108.     }

  109. 

  110.     /* Other defaults */

  111.     v->pq = -1;

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

  113. 

  114.     return 0;

  115. }

  116. 

  117. /***********************************************************************/

  118. /**

  119.  * @defgroup bitplane VC9 Bitplane decoding

  120.  * @see 8.7, p56

  121.  * @{

  122.  */

  123. 

  124. /** @addtogroup bitplane

  125.  * Imode types

  126.  * @{

  127.  */

  128. enum Imode {

  129.     IMODE_RAW,

  130.     IMODE_NORM2,

  131.     IMODE_DIFF2,

  132.     IMODE_NORM6,

  133.     IMODE_DIFF6,

  134.     IMODE_ROWSKIP,

  135.     IMODE_COLSKIP

  136. };

  137. /** @} */ //imode defines

  138. 

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

  140.  * @param plane Buffer to store decoded bits

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

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

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

  144.  */

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

  146.     int x, y;

  147. 

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

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

  150.             memset(plane, 0, width);

  151.         else

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

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

  154.         plane += stride;

  155.     }

  156. }

  157. 

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

  159.  * @param plane Buffer to store decoded bits

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

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

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

  163.  * @todo FIXME: Optimize

  164.  */

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

  166.     int x, y;

  167. 

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

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

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

  171.                 plane[y*stride] = 0;

  172.         else

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

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

  175.         plane ++;

  176.     }

  177. }

  178. 

  179. /** Decode a bitplane's bits

  180.  * @param bp Bitplane where to store the decode bits

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

  182.  * @return Status

  183.  * @todo FIXME: Optimize

  184.  */

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

  186. {

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

  188. 

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

  190.     uint8_t invert, *planep = data;

  191.     int width, height, stride;

  192. 

  193.     width = v->s.mb_width;

  194.     height = v->s.mb_height;

  195.     stride = v->s.mb_stride;

  196.     invert = get_bits1(gb);

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

  198. 

  199.     *raw_flag = 0;

  200.     switch (imode)

  201.     {

  202.     case IMODE_RAW:

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

  204.         *raw_flag = 1; //invert ignored

  205.         return invert;

  206.     case IMODE_DIFF2:

  207.     case IMODE_NORM2:

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

  209.         {

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

  211.             offset = 1;

  212.         }

  213.         else offset = 0;

  214.         // decode bitplane as one long line

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

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

  217.             *planep++ = code & 1;

  218.             offset++;

  219.             if(offset == width) {

  220.                 offset = 0;

  221.                 planep += stride - width;

  222.             }

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

  224.             offset++;

  225.             if(offset == width) {

  226.                 offset = 0;

  227.                 planep += stride - width;

  228.             }

  229.         }

  230.         break;

  231.     case IMODE_DIFF6:

  232.     case IMODE_NORM6:

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

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

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

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

  237.                     if(code < 0){

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

  239.                         return -1;

  240.                     }

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

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

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

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

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

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

  247.                 }

  248.                 planep += stride * 3;

  249.             }

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

  251.         } else { // 3x2

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

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

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

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

  256.                     if(code < 0){

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

  258.                         return -1;

  259.                     }

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

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

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

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

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

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

  266.                 }

  267.                 planep += stride * 2;

  268.             }

  269.             x = width % 3;

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

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

  272.         }

  273.         break;

  274.     case IMODE_ROWSKIP:

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

  276.         break;

  277.     case IMODE_COLSKIP:

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

  279.         break;

  280.     default: break;

  281.     }

  282. 

  283.     /* Applying diff operator */

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

  285.     {

  286.         planep = data;

  287.         planep[0] ^= invert;

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

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

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

  291.         {

  292.             planep += stride;

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

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

  295.             {

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

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

  298.             }

  299.         }

  300.     }

  301.     else if (invert)

  302.     {

  303.         planep = data;

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

  305.     }

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

  307. }

  308. 

  309. /** @} */ //Bitplane group

  310. 

  311. #define FILTSIGN(a) ((a) >= 0 ? 1 : -1)

  312. /**

  313.  * VC-1 in-loop deblocking filter for one line

  314.  * @param src source block type

  315.  * @param pq block quantizer

  316.  * @return whether other 3 pairs should be filtered or not

  317.  * @see 8.6

  318.  */

  319. static int av_always_inline vc1_filter_line(uint8_t* src, int stride, int pq){

  320.     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

  321. 

  322.     int a0 = (2*(src[-2*stride] - src[ 1*stride]) - 5*(src[-1*stride] - src[ 0*stride]) + 4) >> 3;

  323.     int a0_sign = a0 >> 31;        /* Store sign */

  324.     a0 = (a0 ^ a0_sign) - a0_sign; /* a0 = FFABS(a0); */

  325.     if(a0 < pq){

  326.         int a1 = FFABS((2*(src[-4*stride] - src[-1*stride]) - 5*(src[-3*stride] - src[-2*stride]) + 4) >> 3);

  327.         int a2 = FFABS((2*(src[ 0*stride] - src[ 3*stride]) - 5*(src[ 1*stride] - src[ 2*stride]) + 4) >> 3);

  328.         if(a1 < a0 || a2 < a0){

  329.             int clip = src[-1*stride] - src[ 0*stride];

  330.             int clip_sign = clip >> 31;

  331.             clip = ((clip ^ clip_sign) - clip_sign)>>1;

  332.             if(clip){

  333.                 int a3 = FFMIN(a1, a2);

  334.                 int d = 5 * (a3 - a0);

  335.                 int d_sign = (d >> 31);

  336.                 d = ((d ^ d_sign) - d_sign) >> 3;

  337.                 d_sign ^= a0_sign;

  338. 

  339.                 if( d_sign ^ clip_sign )

  340.                     d = 0;

  341.                 else{

  342.                     d = FFMIN(d, clip);

  343.                     d = (d ^ d_sign) - d_sign;          /* Restore sign */

  344.                     src[-1*stride] = cm[src[-1*stride] - d];

  345.                     src[ 0*stride] = cm[src[ 0*stride] + d];

  346.                 }

  347.                 return 1;

  348.             }

  349.         }

  350.     }

  351.     return 0;

  352. }

  353. 

  354. /**

  355.  * VC-1 in-loop deblocking filter

  356.  * @param src source block type

  357.  * @param len edge length to filter (4 or 8 pixels)

  358.  * @param pq block quantizer

  359.  * @see 8.6

  360.  */

  361. static void vc1_loop_filter(uint8_t* src, int step, int stride, int len, int pq)

  362. {

  363.     int i;

  364.     int filt3;

  365. 

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

  367.         filt3 = vc1_filter_line(src + 2*step, stride, pq);

  368.         if(filt3){

  369.             vc1_filter_line(src + 0*step, stride, pq);

  370.             vc1_filter_line(src + 1*step, stride, pq);

  371.             vc1_filter_line(src + 3*step, stride, pq);

  372.         }

  373.         src += step * 4;

  374.     }

  375. }

  376. 

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

  378. {

  379.     int i, j;

  380.     if(!s->first_slice_line)

  381.         vc1_loop_filter(s->dest[0], 1, s->linesize, 16, pq);

  382.     vc1_loop_filter(s->dest[0] + 8*s->linesize, 1, s->linesize, 16, pq);

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

  384.         vc1_loop_filter(s->dest[0] + i, s->linesize, 1, 16, pq);

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

  386.         if(!s->first_slice_line)

  387.             vc1_loop_filter(s->dest[j+1], 1, s->uvlinesize, 8, pq);

  388.         if(s->mb_x)

  389.             vc1_loop_filter(s->dest[j+1], s->uvlinesize, 1, 8, pq);

  390.     }

  391. }

  392. 

  393. /***********************************************************************/

  394. /** VOP Dquant decoding

  395.  * @param v VC-1 Context

  396.  */

  397. static int vop_dquant_decoding(VC1Context *v)

  398. {

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

  400.     int pqdiff;

  401. 

  402.     //variable size

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

  404.     {

  405.         pqdiff = get_bits(gb, 3);

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

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

  408.     }

  409.     else

  410.     {

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

  412.         if ( v->dquantfrm )

  413.         {

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

  415.             switch (v->dqprofile)

  416.             {

  417.             case DQPROFILE_SINGLE_EDGE:

  418.             case DQPROFILE_DOUBLE_EDGES:

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

  420.                 break;

  421.             case DQPROFILE_ALL_MBS:

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

  423.                 if(!v->dqbilevel)

  424.                     v->halfpq = 0;

  425.             default: break; //Forbidden ?

  426.             }

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

  428.             {

  429.                 pqdiff = get_bits(gb, 3);

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

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

  432.             }

  433.         }

  434.     }

  435.     return 0;

  436. }

  437. 

  438. /** Put block onto picture

  439.  */

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

  441. {

  442.     uint8_t *Y;

  443.     int ys, us, vs;

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

  445. 

  446.     if(v->rangeredfrm) {

  447.         int i, j, k;

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

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

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

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

  452. 

  453.     }

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

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

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

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

  458. 

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

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

  461.     Y += ys * 8;

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

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

  464. 

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

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

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

  468.     }

  469. }

  470. 

  471. /** Do motion compensation over 1 macroblock

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

  473.  */

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

  475. {

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

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

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

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

  480. 

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

  482. 

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

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

  485. 

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

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

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

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

  490.     }

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

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

  493.     if(v->fastuvmc) {

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

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

  496.     }

  497.     if(!dir) {

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

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

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

  501.     } else {

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

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

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

  505.     }

  506. 

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

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

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

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

  511. 

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

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

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

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

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

  517.     }else{

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

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

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

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

  522.     }

  523. 

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

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

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

  527. 

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

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

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

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

  532.     }

  533. 

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

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

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

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

  538. 

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

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

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

  542.         srcY = s->edge_emu_buffer;

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

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

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

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

  547.         srcU = uvbuf;

  548.         srcV = uvbuf + 16;

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

  550.         if(v->rangeredfrm) {

  551.             int i, j;

  552.             uint8_t *src, *src2;

  553. 

  554.             src = srcY;

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

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

  557.                 src += s->linesize;

  558.             }

  559.             src = srcU; src2 = srcV;

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

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

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

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

  564.                 }

  565.                 src += s->uvlinesize;

  566.                 src2 += s->uvlinesize;

  567.             }

  568.         }

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

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

  571.             int i, j;

  572.             uint8_t *src, *src2;

  573. 

  574.             src = srcY;

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

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

  577.                 src += s->linesize;

  578.             }

  579.             src = srcU; src2 = srcV;

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

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

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

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

  584.                 }

  585.                 src += s->uvlinesize;

  586.                 src2 += s->uvlinesize;

  587.             }

  588.         }

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

  590.     }

  591. 

  592.     if(s->mspel) {

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

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

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

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

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

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

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

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

  601. 

  602.         if(!v->rnd)

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

  604.         else

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

  606.     }

  607. 

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

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

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

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

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

  613.     if(!v->rnd){

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

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

  616.     }else{

  617.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  618.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  619.     }

  620. }

  621. 

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

  623.  */

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

  625. {

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

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

  628.     uint8_t *srcY;

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

  630.     int off;

  631. 

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

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

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

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

  636. 

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

  638. 

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

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

  641. 

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

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

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

  645.     }else{

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

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

  648.     }

  649. 

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

  651. 

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

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

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

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

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

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

  658.         srcY = s->edge_emu_buffer;

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

  660.         if(v->rangeredfrm) {

  661.             int i, j;

  662.             uint8_t *src;

  663. 

  664.             src = srcY;

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

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

  667.                 src += s->linesize;

  668.             }

  669.         }

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

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

  672.             int i, j;

  673.             uint8_t *src;

  674. 

  675.             src = srcY;

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

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

  678.                 src += s->linesize;

  679.             }

  680.         }

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

  682.     }

  683. 

  684.     if(s->mspel) {

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

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

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

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

  689.         if(!v->rnd)

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

  691.         else

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

  693.     }

  694. }

  695. 

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

  697. {

  698.     if(a < b) {

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

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

  701.     } else {

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

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

  704.     }

  705. }

  706. 

  707. 

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

  709.  */

  710. static void vc1_mc_4mv_chroma(VC1Context *v)

  711. {

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

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

  714.     uint8_t *srcU, *srcV;

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

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

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

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

  719. 

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

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

  722. 

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

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

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

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

  727.     }

  728. 

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

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

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

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

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

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

  735.         switch(idx) {

  736.         case 0x1:

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

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

  739.             break;

  740.         case 0x2:

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

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

  743.             break;

  744.         case 0x4:

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

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

  747.             break;

  748.         case 0x8:

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

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

  751.             break;

  752.         }

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

  754.         int t1 = 0, t2 = 0;

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

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

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

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

  759.     } else {

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

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

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

  763.     }

  764. 

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

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

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

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

  769.     if(v->fastuvmc) {

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

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

  772.     }

  773. 

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

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

  776. 

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

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

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

  780.     }else{

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

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

  783.     }

  784. 

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

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

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

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

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

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

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

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

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

  794.         srcU = s->edge_emu_buffer;

  795.         srcV = s->edge_emu_buffer + 16;

  796. 

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

  798.         if(v->rangeredfrm) {

  799.             int i, j;

  800.             uint8_t *src, *src2;

  801. 

  802.             src = srcU; src2 = srcV;

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

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

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

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

  807.                 }

  808.                 src += s->uvlinesize;

  809.                 src2 += s->uvlinesize;

  810.             }

  811.         }

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

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

  814.             int i, j;

  815.             uint8_t *src, *src2;

  816. 

  817.             src = srcU; src2 = srcV;

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

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

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

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

  822.                 }

  823.                 src += s->uvlinesize;

  824.                 src2 += s->uvlinesize;

  825.             }

  826.         }

  827.     }

  828. 

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

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

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

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

  833.     if(!v->rnd){

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

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

  836.     }else{

  837.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  838.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  839.     }

  840. }

  841. 

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

  843. 

  844. /**

  845.  * Decode Simple/Main Profiles sequence header

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

  847.  * @param avctx Codec context

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

  849.  * @return Status

  850.  */

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

  852. {

  853.     VC1Context *v = avctx->priv_data;

  854. 

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

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

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

  858.     {

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

  860.     }

  861. 

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

  863.     {

  864.         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;

  865.         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;

  866.         return decode_sequence_header_adv(v, gb);

  867.     }

  868.     else

  869.     {

  870.         v->zz_8x4 = wmv2_scantableA;

  871.         v->zz_4x8 = wmv2_scantableB;

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

  873.         if (v->res_sm)

  874.         {

  875.             av_log(avctx, AV_LOG_ERROR,

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

  877.             return -1;

  878.         }

  879.     }

  880. 

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

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

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

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

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

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

  887.     {

  888.         av_log(avctx, AV_LOG_ERROR,

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

  890.     }

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

  892.         v->s.loop_filter = 0;

  893. 

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

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

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

  897.     if (!v->res_fasttx)

  898.     {

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

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

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

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

  903.     }

  904. 

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

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

  907.     {

  908.         av_log(avctx, AV_LOG_ERROR,

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

  910.         return -1;

  911.     }

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

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

  914.     {

  915.         av_log(avctx, AV_LOG_ERROR,

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

  917.         return -1;

  918.     }

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

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

  921. 

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

  923.     if (v->res_transtab)

  924.     {

  925.         av_log(avctx, AV_LOG_ERROR,

  926.                "1 for reserved RES_TRANSTAB is forbidden\n");

  927.         return -1;

  928.     }

  929. 

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

  931. 

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

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

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

  935.     {

  936.         av_log(avctx, AV_LOG_INFO,

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

  938.     }

  939. 

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

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

  942. 

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

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

  945.     if (!v->res_rtm_flag)

  946.     {

  947. //            av_log(avctx, AV_LOG_ERROR,

  948. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  949.         av_log(avctx, AV_LOG_ERROR,

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

  951.         //return -1;

  952.     }

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

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

  955.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  964.                );

  965.     return 0;

  966. }

  967. 

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

  969. {

  970.     v->res_rtm_flag = 1;

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

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

  973.     {

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

  975.     }

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

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

  978.     {

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

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

  981.         return -1;

  982.     }

  983. 

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

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

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

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

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

  989. 

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

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

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

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

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

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

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

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

  998.     skip_bits1(gb); // reserved

  999. 

  1000.     v->s.h_edge_pos = v->s.avctx->coded_width;

  1001.     v->s.v_edge_pos = v->s.avctx->coded_height;

  1002. 

  1003.     av_log(v->s.avctx, AV_LOG_DEBUG,

  1004.                "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"

  1005.                "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"

  1006.                "TFCTRflag=%i, FINTERPflag=%i\n",

  1007.                v->level, v->frmrtq_postproc, v->bitrtq_postproc,

  1008.                v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,

  1009.                v->tfcntrflag, v->finterpflag

  1010.                );

  1011. 

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

  1013.     if(v->psf) { //PsF, 6.1.13

  1014.         av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");

  1015.         return -1;

  1016.     }

  1017.     v->s.max_b_frames = v->s.avctx->max_b_frames = 7;

  1018.     if(get_bits1(gb)) { //Display Info - decoding is not affected by it

  1019.         int w, h, ar = 0;

  1020.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");

  1021.         v->s.avctx->coded_width  = w = get_bits(gb, 14) + 1;

  1022.         v->s.avctx->coded_height = h = get_bits(gb, 14) + 1;

  1023.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);

  1024.         if(get_bits1(gb))

  1025.             ar = get_bits(gb, 4);

  1026.         if(ar && ar < 14){

  1027.             v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];

  1028.         }else if(ar == 15){

  1029.             w = get_bits(gb, 8);

  1030.             h = get_bits(gb, 8);

  1031.             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};

  1032.         }

  1033.         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);

  1034. 

  1035.         if(get_bits1(gb)){ //framerate stuff

  1036.             if(get_bits1(gb)) {

  1037.                 v->s.avctx->time_base.num = 32;

  1038.                 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;

  1039.             } else {

  1040.                 int nr, dr;

  1041.                 nr = get_bits(gb, 8);

  1042.                 dr = get_bits(gb, 4);

  1043.                 if(nr && nr < 8 && dr && dr < 3){

  1044.                     v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];

  1045.                     v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;

  1046.                 }

  1047.             }

  1048.         }

  1049. 

  1050.         if(get_bits1(gb)){

  1051.             v->color_prim = get_bits(gb, 8);

  1052.             v->transfer_char = get_bits(gb, 8);

  1053.             v->matrix_coef = get_bits(gb, 8);

  1054.         }

  1055.     }

  1056. 

  1057.     v->hrd_param_flag = get_bits1(gb);

  1058.     if(v->hrd_param_flag) {

  1059.         int i;

  1060.         v->hrd_num_leaky_buckets = get_bits(gb, 5);

  1061.         skip_bits(gb, 4); //bitrate exponent

  1062.         skip_bits(gb, 4); //buffer size exponent

  1063.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1064.             skip_bits(gb, 16); //hrd_rate[n]

  1065.             skip_bits(gb, 16); //hrd_buffer[n]

  1066.         }

  1067.     }

  1068.     return 0;

  1069. }

  1070. 

  1071. static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)

  1072. {

  1073.     VC1Context *v = avctx->priv_data;

  1074.     int i, blink, clentry;

  1075. 

  1076.     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));

  1077.     blink = get_bits1(gb); // broken link

  1078.     clentry = get_bits1(gb); // closed entry

  1079.     v->panscanflag = get_bits1(gb);

  1080.     v->refdist_flag = get_bits1(gb);

  1081.     v->s.loop_filter = get_bits1(gb);

  1082.     v->fastuvmc = get_bits1(gb);

  1083.     v->extended_mv = get_bits1(gb);

  1084.     v->dquant = get_bits(gb, 2);

  1085.     v->vstransform = get_bits1(gb);

  1086.     v->overlap = get_bits1(gb);

  1087.     v->quantizer_mode = get_bits(gb, 2);

  1088. 

  1089.     if(v->hrd_param_flag){

  1090.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1091.             skip_bits(gb, 8); //hrd_full[n]

  1092.         }

  1093.     }

  1094. 

  1095.     if(get_bits1(gb)){

  1096.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1097.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1098.     }

  1099.     if(v->extended_mv)

  1100.         v->extended_dmv = get_bits1(gb);

  1101.     if((v->range_mapy_flag = get_bits1(gb))) {

  1102.         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");

  1103.         v->range_mapy = get_bits(gb, 3);

  1104.     }

  1105.     if((v->range_mapuv_flag = get_bits1(gb))) {

  1106.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1107.         v->range_mapuv = get_bits(gb, 3);

  1108.     }

  1109. 

  1110.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1111.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1112.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1113.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1114.         blink, clentry, v->panscanflag, v->refdist_flag, v->s.loop_filter,

  1115.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1116. 

  1117.     return 0;

  1118. }

  1119. 

  1120. static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1121. {

  1122.     int pqindex, lowquant, status;

  1123. 

  1124.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1125.     skip_bits(gb, 2); //framecnt unused

  1126.     v->rangeredfrm = 0;

  1127.     if (v->rangered) v->rangeredfrm = get_bits1(gb);

  1128.     v->s.pict_type = get_bits1(gb);

  1129.     if (v->s.avctx->max_b_frames) {

  1130.         if (!v->s.pict_type) {

  1131.             if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;

  1132.             else v->s.pict_type = FF_B_TYPE;

  1133.         } else v->s.pict_type = FF_P_TYPE;

  1134.     } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;

  1135. 

  1136.     v->bi_type = 0;

  1137.     if(v->s.pict_type == FF_B_TYPE) {

  1138.         v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1139.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction];

  1140.         if(v->bfraction == 0) {

  1141.             v->s.pict_type = FF_BI_TYPE;

  1142.         }

  1143.     }

  1144.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1145.         skip_bits(gb, 7); // skip buffer fullness

  1146. 

  1147.     /* calculate RND */

  1148.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1149.         v->rnd = 1;

  1150.     if(v->s.pict_type == FF_P_TYPE)

  1151.         v->rnd ^= 1;

  1152. 

  1153.     /* Quantizer stuff */

  1154.     pqindex = get_bits(gb, 5);

  1155.     if(!pqindex) return -1;

  1156.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1157.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1158.     else

  1159.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1160. 

  1161.     v->pquantizer = 1;

  1162.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1163.         v->pquantizer = pqindex < 9;

  1164.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1165.         v->pquantizer = 0;

  1166.     v->pqindex = pqindex;

  1167.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1168.     else v->halfpq = 0;

  1169.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1170.         v->pquantizer = get_bits1(gb);

  1171.     v->dquantfrm = 0;

  1172.     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);

  1173.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1174.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1175.     v->range_x = 1 << (v->k_x - 1);

  1176.     v->range_y = 1 << (v->k_y - 1);

  1177.     if (v->profile == PROFILE_ADVANCED)

  1178.     {

  1179.         if (v->postprocflag) v->postproc = get_bits1(gb);

  1180.     }

  1181.     else

  1182.         if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);

  1183. 

  1184.     if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){

  1185.         v->x8_type = get_bits1(gb);

  1186.     }else v->x8_type = 0;

  1187. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1188. //        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1189. 

  1190.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1191. 

  1192.     switch(v->s.pict_type) {

  1193.     case FF_P_TYPE:

  1194.         if (v->pq < 5) v->tt_index = 0;

  1195.         else if(v->pq < 13) v->tt_index = 1;

  1196.         else v->tt_index = 2;

  1197. 

  1198.         lowquant = (v->pq > 12) ? 0 : 1;

  1199.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1200.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1201.         {

  1202.             int scale, shift, i;

  1203.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1204.             v->lumscale = get_bits(gb, 6);

  1205.             v->lumshift = get_bits(gb, 6);

  1206.             v->use_ic = 1;

  1207.             /* fill lookup tables for intensity compensation */

  1208.             if(!v->lumscale) {

  1209.                 scale = -64;

  1210.                 shift = (255 - v->lumshift * 2) << 6;

  1211.                 if(v->lumshift > 31)

  1212.                     shift += 128 << 6;

  1213.             } else {

  1214.                 scale = v->lumscale + 32;

  1215.                 if(v->lumshift > 31)

  1216.                     shift = (v->lumshift - 64) << 6;

  1217.                 else

  1218.                     shift = v->lumshift << 6;

  1219.             }

  1220.             for(i = 0; i < 256; i++) {

  1221.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1222.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1223.             }

  1224.         }

  1225.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1226.             v->s.quarter_sample = 0;

  1227.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1228.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1229.                 v->s.quarter_sample = 0;

  1230.             else

  1231.                 v->s.quarter_sample = 1;

  1232.         } else

  1233.             v->s.quarter_sample = 1;

  1234.         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));

  1235. 

  1236.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1237.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1238.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1239.         {

  1240.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1241.             if (status < 0) return -1;

  1242.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1243.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1244.         } else {

  1245.             v->mv_type_is_raw = 0;

  1246.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1247.         }

  1248.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1249.         if (status < 0) return -1;

  1250.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1251.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1252. 

  1253.         /* Hopefully this is correct for P frames */

  1254.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1255.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1256. 

  1257.         if (v->dquant)

  1258.         {

  1259.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1260.             vop_dquant_decoding(v);

  1261.         }

  1262. 

  1263.         v->ttfrm = 0; //FIXME Is that so ?

  1264.         if (v->vstransform)

  1265.         {

  1266.             v->ttmbf = get_bits1(gb);

  1267.             if (v->ttmbf)

  1268.             {

  1269.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1270.             }

  1271.         } else {

  1272.             v->ttmbf = 1;

  1273.             v->ttfrm = TT_8X8;

  1274.         }

  1275.         break;

  1276.     case FF_B_TYPE:

  1277.         if (v->pq < 5) v->tt_index = 0;

  1278.         else if(v->pq < 13) v->tt_index = 1;

  1279.         else v->tt_index = 2;

  1280. 

  1281.         lowquant = (v->pq > 12) ? 0 : 1;

  1282.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1283.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1284.         v->s.mspel = v->s.quarter_sample;

  1285. 

  1286.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1287.         if (status < 0) return -1;

  1288.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1289.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1290.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1291.         if (status < 0) return -1;

  1292.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1293.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1294. 

  1295.         v->s.mv_table_index = get_bits(gb, 2);

  1296.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1297. 

  1298.         if (v->dquant)

  1299.         {

  1300.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1301.             vop_dquant_decoding(v);

  1302.         }

  1303. 

  1304.         v->ttfrm = 0;

  1305.         if (v->vstransform)

  1306.         {

  1307.             v->ttmbf = get_bits1(gb);

  1308.             if (v->ttmbf)

  1309.             {

  1310.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1311.             }

  1312.         } else {

  1313.             v->ttmbf = 1;

  1314.             v->ttfrm = TT_8X8;

  1315.         }

  1316.         break;

  1317.     }

  1318. 

  1319.     if(!v->x8_type)

  1320.     {

  1321.         /* AC Syntax */

  1322.         v->c_ac_table_index = decode012(gb);

  1323.         if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1324.         {

  1325.             v->y_ac_table_index = decode012(gb);

  1326.         }

  1327.         /* DC Syntax */

  1328.         v->s.dc_table_index = get_bits1(gb);

  1329.     }

  1330. 

  1331.     if(v->s.pict_type == FF_BI_TYPE) {

  1332.         v->s.pict_type = FF_B_TYPE;

  1333.         v->bi_type = 1;

  1334.     }

  1335.     return 0;

  1336. }

  1337. 

  1338. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1339. {

  1340.     int pqindex, lowquant;

  1341.     int status;

  1342. 

  1343.     v->p_frame_skipped = 0;

  1344. 

  1345.     if(v->interlace){

  1346.         v->fcm = decode012(gb);

  1347.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1348.     }

  1349.     switch(get_unary(gb, 0, 4)) {

  1350.     case 0:

  1351.         v->s.pict_type = FF_P_TYPE;

  1352.         break;

  1353.     case 1:

  1354.         v->s.pict_type = FF_B_TYPE;

  1355.         break;

  1356.     case 2:

  1357.         v->s.pict_type = FF_I_TYPE;

  1358.         break;

  1359.     case 3:

  1360.         v->s.pict_type = FF_BI_TYPE;

  1361.         break;

  1362.     case 4:

  1363.         v->s.pict_type = FF_P_TYPE; // skipped pic

  1364.         v->p_frame_skipped = 1;

  1365.         return 0;

  1366.     }

  1367.     if(v->tfcntrflag)

  1368.         skip_bits(gb, 8);

  1369.     if(v->broadcast) {

  1370.         if(!v->interlace || v->psf) {

  1371.             v->rptfrm = get_bits(gb, 2);

  1372.         } else {

  1373.             v->tff = get_bits1(gb);

  1374.             v->rptfrm = get_bits1(gb);

  1375.         }

  1376.     }

  1377.     if(v->panscanflag) {

  1378.         //...

  1379.     }

  1380.     v->rnd = get_bits1(gb);

  1381.     if(v->interlace)

  1382.         v->uvsamp = get_bits1(gb);

  1383.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1384.     if(v->s.pict_type == FF_B_TYPE) {

  1385.         v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1386.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction];

  1387.         if(v->bfraction == 0) {

  1388.             v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */

  1389.         }

  1390.     }

  1391.     pqindex = get_bits(gb, 5);

  1392.     if(!pqindex) return -1;

  1393.     v->pqindex = pqindex;

  1394.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1395.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1396.     else

  1397.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1398. 

  1399.     v->pquantizer = 1;

  1400.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1401.         v->pquantizer = pqindex < 9;

  1402.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1403.         v->pquantizer = 0;

  1404.     v->pqindex = pqindex;

  1405.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1406.     else v->halfpq = 0;

  1407.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1408.         v->pquantizer = get_bits1(gb);

  1409.     if(v->postprocflag)

  1410.         v->postproc = get_bits1(gb);

  1411. 

  1412.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1413. 

  1414.     switch(v->s.pict_type) {

  1415.     case FF_I_TYPE:

  1416.     case FF_BI_TYPE:

  1417.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

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

  1419.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

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

  1421.         v->condover = CONDOVER_NONE;

  1422.         if(v->overlap && v->pq <= 8) {

  1423.             v->condover = decode012(gb);

  1424.             if(v->condover == CONDOVER_SELECT) {

  1425.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

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

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

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

  1429.             }

  1430.         }

  1431.         break;

  1432.     case FF_P_TYPE:

  1433.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1434.         else v->mvrange = 0;

  1435.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1436.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1437.         v->range_x = 1 << (v->k_x - 1);

  1438.         v->range_y = 1 << (v->k_y - 1);

  1439. 

  1440.         if (v->pq < 5) v->tt_index = 0;

  1441.         else if(v->pq < 13) v->tt_index = 1;

  1442.         else v->tt_index = 2;

  1443. 

  1444.         lowquant = (v->pq > 12) ? 0 : 1;

  1445.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1446.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1447.         {

  1448.             int scale, shift, i;

  1449.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1450.             v->lumscale = get_bits(gb, 6);

  1451.             v->lumshift = get_bits(gb, 6);

  1452.             /* fill lookup tables for intensity compensation */

  1453.             if(!v->lumscale) {

  1454.                 scale = -64;

  1455.                 shift = (255 - v->lumshift * 2) << 6;

  1456.                 if(v->lumshift > 31)

  1457.                     shift += 128 << 6;

  1458.             } else {

  1459.                 scale = v->lumscale + 32;

  1460.                 if(v->lumshift > 31)

  1461.                     shift = (v->lumshift - 64) << 6;

  1462.                 else

  1463.                     shift = v->lumshift << 6;

  1464.             }

  1465.             for(i = 0; i < 256; i++) {

  1466.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1467.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1468.             }

  1469.             v->use_ic = 1;

  1470.         }

  1471.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1472.             v->s.quarter_sample = 0;

  1473.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1474.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1475.                 v->s.quarter_sample = 0;

  1476.             else

  1477.                 v->s.quarter_sample = 1;

  1478.         } else

  1479.             v->s.quarter_sample = 1;

  1480.         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));

  1481. 

  1482.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1483.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1484.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1485.         {

  1486.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1487.             if (status < 0) return -1;

  1488.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1489.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1490.         } else {

  1491.             v->mv_type_is_raw = 0;

  1492.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1493.         }

  1494.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1495.         if (status < 0) return -1;

  1496.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1497.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1498. 

  1499.         /* Hopefully this is correct for P frames */

  1500.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

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

  1502.         if (v->dquant)

  1503.         {

  1504.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1505.             vop_dquant_decoding(v);

  1506.         }

  1507. 

  1508.         v->ttfrm = 0; //FIXME Is that so ?

  1509.         if (v->vstransform)

  1510.         {

  1511.             v->ttmbf = get_bits1(gb);

  1512.             if (v->ttmbf)

  1513.             {

  1514.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1515.             }

  1516.         } else {

  1517.             v->ttmbf = 1;

  1518.             v->ttfrm = TT_8X8;

  1519.         }

  1520.         break;

  1521.     case FF_B_TYPE:

  1522.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1523.         else v->mvrange = 0;

  1524.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1525.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1526.         v->range_x = 1 << (v->k_x - 1);

  1527.         v->range_y = 1 << (v->k_y - 1);

  1528. 

  1529.         if (v->pq < 5) v->tt_index = 0;

  1530.         else if(v->pq < 13) v->tt_index = 1;

  1531.         else v->tt_index = 2;

  1532. 

  1533.         lowquant = (v->pq > 12) ? 0 : 1;

  1534.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1535.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1536.         v->s.mspel = v->s.quarter_sample;

  1537. 

  1538.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1539.         if (status < 0) return -1;

  1540.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1541.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1542.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1543.         if (status < 0) return -1;

  1544.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1545.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1546. 

  1547.         v->s.mv_table_index = get_bits(gb, 2);

  1548.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1549. 

  1550.         if (v->dquant)

  1551.         {

  1552.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1553.             vop_dquant_decoding(v);

  1554.         }

  1555. 

  1556.         v->ttfrm = 0;

  1557.         if (v->vstransform)

  1558.         {

  1559.             v->ttmbf = get_bits1(gb);

  1560.             if (v->ttmbf)

  1561.             {

  1562.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1563.             }

  1564.         } else {

  1565.             v->ttmbf = 1;

  1566.             v->ttfrm = TT_8X8;

  1567.         }

  1568.         break;

  1569.     }

  1570. 

  1571.     /* AC Syntax */

  1572.     v->c_ac_table_index = decode012(gb);

  1573.     if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1574.     {

  1575.         v->y_ac_table_index = decode012(gb);

  1576.     }

  1577.     /* DC Syntax */

  1578.     v->s.dc_table_index = get_bits1(gb);

  1579.     if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {

  1580.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1581.         vop_dquant_decoding(v);

  1582.     }

  1583. 

  1584.     v->bi_type = 0;

  1585.     if(v->s.pict_type == FF_BI_TYPE) {

  1586.         v->s.pict_type = FF_B_TYPE;

  1587.         v->bi_type = 1;

  1588.     }

  1589.     return 0;

  1590. }

  1591. 

  1592. /***********************************************************************/

  1593. /**

  1594.  * @defgroup block VC-1 Block-level functions

  1595.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1596.  * @{

  1597.  */

  1598. 

  1599. /**

  1600.  * @def GET_MQUANT

  1601.  * @brief Get macroblock-level quantizer scale

  1602.  */

  1603. #define GET_MQUANT()                                           \

  1604.   if (v->dquantfrm)                                            \

  1605.   {                                                            \

  1606.     int edges = 0;                                             \

  1607.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1608.     {                                                          \

  1609.       if (v->dqbilevel)                                        \

  1610.       {                                                        \

  1611.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1612.       }                                                        \

  1613.       else                                                     \

  1614.       {                                                        \

  1615.         mqdiff = get_bits(gb, 3);                              \

  1616.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1617.         else mquant = get_bits(gb, 5);                         \

  1618.       }                                                        \

  1619.     }                                                          \

  1620.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1621.         edges = 1 << v->dqsbedge;                              \

  1622.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1623.         edges = (3 << v->dqsbedge) % 15;                       \

  1624.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1625.         edges = 15;                                            \

  1626.     if((edges&1) && !s->mb_x)                                  \

  1627.         mquant = v->altpq;                                     \

  1628.     if((edges&2) && s->first_slice_line)                       \

  1629.         mquant = v->altpq;                                     \

  1630.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1631.         mquant = v->altpq;                                     \

  1632.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1633.         mquant = v->altpq;                                     \

  1634.   }

  1635. 

  1636. /**

  1637.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1638.  * @brief Get MV differentials

  1639.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1640.  * @param _dmv_x Horizontal differential for decoded MV

  1641.  * @param _dmv_y Vertical differential for decoded MV

  1642.  */

  1643. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1644.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1645.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1646.   if (index > 36)                                                   \

  1647.   {                                                                 \

  1648.     mb_has_coeffs = 1;                                              \

  1649.     index -= 37;                                                    \

  1650.   }                                                                 \

  1651.   else mb_has_coeffs = 0;                                           \

  1652.   s->mb_intra = 0;                                                  \

  1653.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1654.   else if (index == 35)                                             \

  1655.   {                                                                 \

  1656.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1657.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1658.   }                                                                 \

  1659.   else if (index == 36)                                             \

  1660.   {                                                                 \

  1661.     _dmv_x = 0;                                                     \

  1662.     _dmv_y = 0;                                                     \

  1663.     s->mb_intra = 1;                                                \

  1664.   }                                                                 \

  1665.   else                                                              \

  1666.   {                                                                 \

  1667.     index1 = index%6;                                               \

  1668.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1669.     else                                   val = 0;                 \

  1670.     if(size_table[index1] - val > 0)                                \

  1671.         val = get_bits(gb, size_table[index1] - val);               \

  1672.     else                                   val = 0;                 \

  1673.     sign = 0 - (val&1);                                             \

  1674.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1675.                                                                     \

  1676.     index1 = index/6;                                               \

  1677.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1678.     else                                   val = 0;                 \

  1679.     if(size_table[index1] - val > 0)                                \

  1680.         val = get_bits(gb, size_table[index1] - val);               \

  1681.     else                                   val = 0;                 \

  1682.     sign = 0 - (val&1);                                             \

  1683.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1684.   }

  1685. 

  1686. /** Predict and set motion vector

  1687.  */

  1688. 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)

  1689. {

  1690.     int xy, wrap, off = 0;

  1691.     int16_t *A, *B, *C;

  1692.     int px, py;

  1693.     int sum;

  1694. 

  1695.     /* scale MV difference to be quad-pel */

  1696.     dmv_x <<= 1 - s->quarter_sample;

  1697.     dmv_y <<= 1 - s->quarter_sample;

  1698. 

  1699.     wrap = s->b8_stride;

  1700.     xy = s->block_index[n];

  1701. 

  1702.     if(s->mb_intra){

  1703.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1704.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

  1705.         s->current_picture.motion_val[1][xy][0] = 0;

  1706.         s->current_picture.motion_val[1][xy][1] = 0;

  1707.         if(mv1) { /* duplicate motion data for 1-MV block */

  1708.             s->current_picture.motion_val[0][xy + 1][0] = 0;

  1709.             s->current_picture.motion_val[0][xy + 1][1] = 0;

  1710.             s->current_picture.motion_val[0][xy + wrap][0] = 0;

  1711.             s->current_picture.motion_val[0][xy + wrap][1] = 0;

  1712.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  1713.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  1714.             s->current_picture.motion_val[1][xy + 1][0] = 0;

  1715.             s->current_picture.motion_val[1][xy + 1][1] = 0;

  1716.             s->current_picture.motion_val[1][xy + wrap][0] = 0;

  1717.             s->current_picture.motion_val[1][xy + wrap][1] = 0;

  1718.             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;

  1719.             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;

  1720.         }

  1721.         return;

  1722.     }

  1723. 

  1724.     C = s->current_picture.motion_val[0][xy - 1];

  1725.     A = s->current_picture.motion_val[0][xy - wrap];

  1726.     if(mv1)

  1727.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1728.     else {

  1729.         //in 4-MV mode different blocks have different B predictor position

  1730.         switch(n){

  1731.         case 0:

  1732.             off = (s->mb_x > 0) ? -1 : 1;

  1733.             break;

  1734.         case 1:

  1735.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1736.             break;

  1737.         case 2:

  1738.             off = 1;

  1739.             break;

  1740.         case 3:

  1741.             off = -1;

  1742.         }

  1743.     }

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

  1745. 

  1746.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1747.         if(s->mb_width == 1) {

  1748.             px = A[0];

  1749.             py = A[1];

  1750.         } else {

  1751.             px = mid_pred(A[0], B[0], C[0]);

  1752.             py = mid_pred(A[1], B[1], C[1]);

  1753.         }

  1754.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1755.         px = C[0];

  1756.         py = C[1];

  1757.     } else {

  1758.         px = py = 0;

  1759.     }

  1760.     /* Pullback MV as specified in 8.3.5.3.4 */

  1761.     {

  1762.         int qx, qy, X, Y;

  1763.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1764.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1765.         X = (s->mb_width << 6) - 4;

  1766.         Y = (s->mb_height << 6) - 4;

  1767.         if(mv1) {

  1768.             if(qx + px < -60) px = -60 - qx;

  1769.             if(qy + py < -60) py = -60 - qy;

  1770.         } else {

  1771.             if(qx + px < -28) px = -28 - qx;

  1772.             if(qy + py < -28) py = -28 - qy;

  1773.         }

  1774.         if(qx + px > X) px = X - qx;

  1775.         if(qy + py > Y) py = Y - qy;

  1776.     }

  1777.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1778.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1779.         if(is_intra[xy - wrap])

  1780.             sum = FFABS(px) + FFABS(py);

  1781.         else

  1782.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1783.         if(sum > 32) {

  1784.             if(get_bits1(&s->gb)) {

  1785.                 px = A[0];

  1786.                 py = A[1];

  1787.             } else {

  1788.                 px = C[0];

  1789.                 py = C[1];

  1790.             }

  1791.         } else {

  1792.             if(is_intra[xy - 1])

  1793.                 sum = FFABS(px) + FFABS(py);

  1794.             else

  1795.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1796.             if(sum > 32) {

  1797.                 if(get_bits1(&s->gb)) {

  1798.                     px = A[0];

  1799.                     py = A[1];

  1800.                 } else {

  1801.                     px = C[0];

  1802.                     py = C[1];

  1803.                 }

  1804.             }

  1805.         }

  1806.     }

  1807.     /* store MV using signed modulus of MV range defined in 4.11 */

  1808.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1809.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1810.     if(mv1) { /* duplicate motion data for 1-MV block */

  1811.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  1812.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  1813.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1814.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1815.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1816.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1817.     }

  1818. }

  1819. 

  1820. /** Motion compensation for direct or interpolated blocks in B-frames

  1821.  */

  1822. static void vc1_interp_mc(VC1Context *v)

  1823. {

  1824.     MpegEncContext *s = &v->s;

  1825.     DSPContext *dsp = &v->s.dsp;

  1826.     uint8_t *srcY, *srcU, *srcV;

  1827.     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1828. 

  1829.     if(!v->s.next_picture.data[0])return;

  1830. 

  1831.     mx = s->mv[1][0][0];

  1832.     my = s->mv[1][0][1];

  1833.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1834.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1835.     if(v->fastuvmc) {

  1836.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1837.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1838.     }

  1839.     srcY = s->next_picture.data[0];

  1840.     srcU = s->next_picture.data[1];

  1841.     srcV = s->next_picture.data[2];

  1842. 

  1843.     src_x = s->mb_x * 16 + (mx >> 2);

  1844.     src_y = s->mb_y * 16 + (my >> 2);

  1845.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1846.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1847. 

  1848.     if(v->profile != PROFILE_ADVANCED){

  1849.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1850.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1851.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1852.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1853.     }else{

  1854.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1855.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1856.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1857.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1858.     }

  1859. 

  1860.     srcY += src_y * s->linesize + src_x;

  1861.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1862.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1863. 

  1864.     /* for grayscale we should not try to read from unknown area */

  1865.     if(s->flags & CODEC_FLAG_GRAY) {

  1866.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1867.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1868.     }

  1869. 

  1870.     if(v->rangeredfrm

  1871.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  1872.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  1873.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1874. 

  1875.         srcY -= s->mspel * (1 + s->linesize);

  1876.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1877.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1878.         srcY = s->edge_emu_buffer;

  1879.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1880.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1881.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1882.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1883.         srcU = uvbuf;

  1884.         srcV = uvbuf + 16;

  1885.         /* if we deal with range reduction we need to scale source blocks */

  1886.         if(v->rangeredfrm) {

  1887.             int i, j;

  1888.             uint8_t *src, *src2;

  1889. 

  1890.             src = srcY;

  1891.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1892.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1893.                 src += s->linesize;

  1894.             }

  1895.             src = srcU; src2 = srcV;

  1896.             for(j = 0; j < 9; j++) {

  1897.                 for(i = 0; i < 9; i++) {

  1898.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1899.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1900.                 }

  1901.                 src += s->uvlinesize;

  1902.                 src2 += s->uvlinesize;

  1903.             }

  1904.         }

  1905.         srcY += s->mspel * (1 + s->linesize);

  1906.     }

  1907. 

  1908.     mx >>= 1;

  1909.     my >>= 1;

  1910.     dxy = ((my & 1) << 1) | (mx & 1);

  1911. 

  1912.     dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1913. 

  1914.     if(s->flags & CODEC_FLAG_GRAY) return;

  1915.     /* Chroma MC always uses qpel blilinear */

  1916.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  1917.     uvmx = (uvmx&3)<<1;

  1918.     uvmy = (uvmy&3)<<1;

  1919.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1920.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1921. }

  1922. 

  1923. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1924. {

  1925.     int n = bfrac;

  1926. 

  1927. #if B_FRACTION_DEN==256

  1928.     if(inv)

  1929.         n -= 256;

  1930.     if(!qs)

  1931.         return 2 * ((value * n + 255) >> 9);

  1932.     return (value * n + 128) >> 8;

  1933. #else

  1934.     if(inv)

  1935.         n -= B_FRACTION_DEN;

  1936.     if(!qs)

  1937.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1938.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1939. #endif

  1940. }

  1941. 

  1942. /** Reconstruct motion vector for B-frame and do motion compensation

  1943.  */

  1944. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1945. {

  1946.     if(v->use_ic) {

  1947.         v->mv_mode2 = v->mv_mode;

  1948.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1949.     }

  1950.     if(direct) {

  1951.         vc1_mc_1mv(v, 0);

  1952.         vc1_interp_mc(v);

  1953.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1954.         return;

  1955.     }

  1956.     if(mode == BMV_TYPE_INTERPOLATED) {

  1957.         vc1_mc_1mv(v, 0);

  1958.         vc1_interp_mc(v);

  1959.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1960.         return;

  1961.     }

  1962. 

  1963.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1964.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1965.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1966. }

  1967. 

  1968. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1969. {

  1970.     MpegEncContext *s = &v->s;

  1971.     int xy, wrap, off = 0;

  1972.     int16_t *A, *B, *C;

  1973.     int px, py;

  1974.     int sum;

  1975.     int r_x, r_y;

  1976.     const uint8_t *is_intra = v->mb_type[0];

  1977. 

  1978.     r_x = v->range_x;

  1979.     r_y = v->range_y;

  1980.     /* scale MV difference to be quad-pel */

  1981.     dmv_x[0] <<= 1 - s->quarter_sample;

  1982.     dmv_y[0] <<= 1 - s->quarter_sample;

  1983.     dmv_x[1] <<= 1 - s->quarter_sample;

  1984.     dmv_y[1] <<= 1 - s->quarter_sample;

  1985. 

  1986.     wrap = s->b8_stride;

  1987.     xy = s->block_index[0];

  1988. 

  1989.     if(s->mb_intra) {

  1990.         s->current_picture.motion_val[0][xy][0] =

  1991.         s->current_picture.motion_val[0][xy][1] =

  1992.         s->current_picture.motion_val[1][xy][0] =

  1993.         s->current_picture.motion_val[1][xy][1] = 0;

  1994.         return;

  1995.     }

  1996.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  1997.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  1998.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  1999.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  2000. 

  2001.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  2002.     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));

  2003.     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));

  2004.     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));

  2005.     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));

  2006.     if(direct) {

  2007.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2008.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2009.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2010.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2011.         return;

  2012.     }

  2013. 

  2014.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2015.         C = s->current_picture.motion_val[0][xy - 2];

  2016.         A = s->current_picture.motion_val[0][xy - wrap*2];

  2017.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2018.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  2019. 

  2020.         if(!s->mb_x) C[0] = C[1] = 0;

  2021.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2022.             if(s->mb_width == 1) {

  2023.                 px = A[0];

  2024.                 py = A[1];

  2025.             } else {

  2026.                 px = mid_pred(A[0], B[0], C[0]);

  2027.                 py = mid_pred(A[1], B[1], C[1]);

  2028.             }

  2029.         } else if(s->mb_x) { // predictor C is not out of bounds

  2030.             px = C[0];

  2031.             py = C[1];

  2032.         } else {

  2033.             px = py = 0;

  2034.         }

  2035.         /* Pullback MV as specified in 8.3.5.3.4 */

  2036.         {

  2037.             int qx, qy, X, Y;

  2038.             if(v->profile < PROFILE_ADVANCED) {

  2039.                 qx = (s->mb_x << 5);

  2040.                 qy = (s->mb_y << 5);

  2041.                 X = (s->mb_width << 5) - 4;

  2042.                 Y = (s->mb_height << 5) - 4;

  2043.                 if(qx + px < -28) px = -28 - qx;

  2044.                 if(qy + py < -28) py = -28 - qy;

  2045.                 if(qx + px > X) px = X - qx;

  2046.                 if(qy + py > Y) py = Y - qy;

  2047.             } else {

  2048.                 qx = (s->mb_x << 6);

  2049.                 qy = (s->mb_y << 6);

  2050.                 X = (s->mb_width << 6) - 4;

  2051.                 Y = (s->mb_height << 6) - 4;

  2052.                 if(qx + px < -60) px = -60 - qx;

  2053.                 if(qy + py < -60) py = -60 - qy;

  2054.                 if(qx + px > X) px = X - qx;

  2055.                 if(qy + py > Y) py = Y - qy;

  2056.             }

  2057.         }

  2058.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2059.         if(0 && !s->first_slice_line && s->mb_x) {

  2060.             if(is_intra[xy - wrap])

  2061.                 sum = FFABS(px) + FFABS(py);

  2062.             else

  2063.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2064.             if(sum > 32) {

  2065.                 if(get_bits1(&s->gb)) {

  2066.                     px = A[0];

  2067.                     py = A[1];

  2068.                 } else {

  2069.                     px = C[0];

  2070.                     py = C[1];

  2071.                 }

  2072.             } else {

  2073.                 if(is_intra[xy - 2])

  2074.                     sum = FFABS(px) + FFABS(py);

  2075.                 else

  2076.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2077.                 if(sum > 32) {

  2078.                     if(get_bits1(&s->gb)) {

  2079.                         px = A[0];

  2080.                         py = A[1];

  2081.                     } else {

  2082.                         px = C[0];

  2083.                         py = C[1];

  2084.                     }

  2085.                 }

  2086.             }

  2087.         }

  2088.         /* store MV using signed modulus of MV range defined in 4.11 */

  2089.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2090.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2091.     }

  2092.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2093.         C = s->current_picture.motion_val[1][xy - 2];

  2094.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2095.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2096.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2097. 

  2098.         if(!s->mb_x) C[0] = C[1] = 0;

  2099.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2100.             if(s->mb_width == 1) {

  2101.                 px = A[0];

  2102.                 py = A[1];

  2103.             } else {

  2104.                 px = mid_pred(A[0], B[0], C[0]);

  2105.                 py = mid_pred(A[1], B[1], C[1]);

  2106.             }

  2107.         } else if(s->mb_x) { // predictor C is not out of bounds

  2108.             px = C[0];

  2109.             py = C[1];

  2110.         } else {

  2111.             px = py = 0;

  2112.         }

  2113.         /* Pullback MV as specified in 8.3.5.3.4 */

  2114.         {

  2115.             int qx, qy, X, Y;

  2116.             if(v->profile < PROFILE_ADVANCED) {

  2117.                 qx = (s->mb_x << 5);

  2118.                 qy = (s->mb_y << 5);

  2119.                 X = (s->mb_width << 5) - 4;

  2120.                 Y = (s->mb_height << 5) - 4;

  2121.                 if(qx + px < -28) px = -28 - qx;

  2122.                 if(qy + py < -28) py = -28 - qy;

  2123.                 if(qx + px > X) px = X - qx;

  2124.                 if(qy + py > Y) py = Y - qy;

  2125.             } else {

  2126.                 qx = (s->mb_x << 6);

  2127.                 qy = (s->mb_y << 6);

  2128.                 X = (s->mb_width << 6) - 4;

  2129.                 Y = (s->mb_height << 6) - 4;

  2130.                 if(qx + px < -60) px = -60 - qx;

  2131.                 if(qy + py < -60) py = -60 - qy;

  2132.                 if(qx + px > X) px = X - qx;

  2133.                 if(qy + py > Y) py = Y - qy;

  2134.             }

  2135.         }

  2136.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2137.         if(0 && !s->first_slice_line && s->mb_x) {

  2138.             if(is_intra[xy - wrap])

  2139.                 sum = FFABS(px) + FFABS(py);

  2140.             else

  2141.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2142.             if(sum > 32) {

  2143.                 if(get_bits1(&s->gb)) {

  2144.                     px = A[0];

  2145.                     py = A[1];

  2146.                 } else {

  2147.                     px = C[0];

  2148.                     py = C[1];

  2149.                 }

  2150.             } else {

  2151.                 if(is_intra[xy - 2])

  2152.                     sum = FFABS(px) + FFABS(py);

  2153.                 else

  2154.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2155.                 if(sum > 32) {

  2156.                     if(get_bits1(&s->gb)) {

  2157.                         px = A[0];

  2158.                         py = A[1];

  2159.                     } else {

  2160.                         px = C[0];

  2161.                         py = C[1];

  2162.                     }

  2163.                 }

  2164.             }

  2165.         }

  2166.         /* store MV using signed modulus of MV range defined in 4.11 */

  2167. 

  2168.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2169.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2170.     }

  2171.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2172.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2173.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2174.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2175. }

  2176. 

  2177. /** Get predicted DC value for I-frames only

  2178.  * prediction dir: left=0, top=1

  2179.  * @param s MpegEncContext

  2180.  * @param[in] n block index in the current MB

  2181.  * @param dc_val_ptr Pointer to DC predictor

  2182.  * @param dir_ptr Prediction direction for use in AC prediction

  2183.  */

  2184. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2185.                               int16_t **dc_val_ptr, int *dir_ptr)

  2186. {

  2187.     int a, b, c, wrap, pred, scale;

  2188.     int16_t *dc_val;

  2189.     static const uint16_t dcpred[32] = {

  2190.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2191.          114,  102,   93,   85,   79,   73,   68,   64,

  2192.           60,   57,   54,   51,   49,   47,   45,   43,

  2193.           41,   39,   38,   37,   35,   34,   33

  2194.     };

  2195. 

  2196.     /* find prediction - wmv3_dc_scale always used here in fact */

  2197.     if (n < 4)     scale = s->y_dc_scale;

  2198.     else           scale = s->c_dc_scale;

  2199. 

  2200.     wrap = s->block_wrap[n];

  2201.     dc_val= s->dc_val[0] + s->block_index[n];

  2202. 

  2203.     /* B A

  2204.      * C X

  2205.      */

  2206.     c = dc_val[ - 1];

  2207.     b = dc_val[ - 1 - wrap];

  2208.     a = dc_val[ - wrap];

  2209. 

  2210.     if (pq < 9 || !overlap)

  2211.     {

  2212.         /* Set outer values */

  2213.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2214.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2215.     }

  2216.     else

  2217.     {

  2218.         /* Set outer values */

  2219.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2220.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2221.     }

  2222. 

  2223.     if (abs(a - b) <= abs(b - c)) {

  2224.         pred = c;

  2225.         *dir_ptr = 1;//left

  2226.     } else {

  2227.         pred = a;

  2228.         *dir_ptr = 0;//top

  2229.     }

  2230. 

  2231.     /* update predictor */

  2232.     *dc_val_ptr = &dc_val[0];

  2233.     return pred;

  2234. }

  2235. 

  2236. 

  2237. /** Get predicted DC value

  2238.  * prediction dir: left=0, top=1

  2239.  * @param s MpegEncContext

  2240.  * @param[in] n block index in the current MB

  2241.  * @param dc_val_ptr Pointer to DC predictor

  2242.  * @param dir_ptr Prediction direction for use in AC prediction

  2243.  */

  2244. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2245.                               int a_avail, int c_avail,

  2246.                               int16_t **dc_val_ptr, int *dir_ptr)

  2247. {

  2248.     int a, b, c, wrap, pred, scale;

  2249.     int16_t *dc_val;

  2250.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2251.     int q1, q2 = 0;

  2252. 

  2253.     /* find prediction - wmv3_dc_scale always used here in fact */

  2254.     if (n < 4)     scale = s->y_dc_scale;

  2255.     else           scale = s->c_dc_scale;

  2256. 

  2257.     wrap = s->block_wrap[n];

  2258.     dc_val= s->dc_val[0] + s->block_index[n];

  2259. 

  2260.     /* B A

  2261.      * C X

  2262.      */

  2263.     c = dc_val[ - 1];

  2264.     b = dc_val[ - 1 - wrap];

  2265.     a = dc_val[ - wrap];

  2266.     /* scale predictors if needed */

  2267.     q1 = s->current_picture.qscale_table[mb_pos];

  2268.     if(c_avail && (n!= 1 && n!=3)) {

  2269.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2270.         if(q2 && q2 != q1)

  2271.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2272.     }

  2273.     if(a_avail && (n!= 2 && n!=3)) {

  2274.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2275.         if(q2 && q2 != q1)

  2276.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2277.     }

  2278.     if(a_avail && c_avail && (n!=3)) {

  2279.         int off = mb_pos;

  2280.         if(n != 1) off--;

  2281.         if(n != 2) off -= s->mb_stride;

  2282.         q2 = s->current_picture.qscale_table[off];

  2283.         if(q2 && q2 != q1)

  2284.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2285.     }

  2286. 

  2287.     if(a_avail && c_avail) {

  2288.         if(abs(a - b) <= abs(b - c)) {

  2289.             pred = c;

  2290.             *dir_ptr = 1;//left

  2291.         } else {

  2292.             pred = a;

  2293.             *dir_ptr = 0;//top

  2294.         }

  2295.     } else if(a_avail) {

  2296.         pred = a;

  2297.         *dir_ptr = 0;//top

  2298.     } else if(c_avail) {

  2299.         pred = c;

  2300.         *dir_ptr = 1;//left

  2301.     } else {

  2302.         pred = 0;

  2303.         *dir_ptr = 1;//left

  2304.     }

  2305. 

  2306.     /* update predictor */

  2307.     *dc_val_ptr = &dc_val[0];

  2308.     return pred;

  2309. }

  2310. 

  2311. 

  2312. /**

  2313.  * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2314.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2315.  * @{

  2316.  */

  2317. 

  2318. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2319. {

  2320.     int xy, wrap, pred, a, b, c;

  2321. 

  2322.     xy = s->block_index[n];

  2323.     wrap = s->b8_stride;

  2324. 

  2325.     /* B C

  2326.      * A X

  2327.      */

  2328.     a = s->coded_block[xy - 1       ];

  2329.     b = s->coded_block[xy - 1 - wrap];

  2330.     c = s->coded_block[xy     - wrap];

  2331. 

  2332.     if (b == c) {

  2333.         pred = a;

  2334.     } else {

  2335.         pred = c;

  2336.     }

  2337. 

  2338.     /* store value */

  2339.     *coded_block_ptr = &s->coded_block[xy];

  2340. 

  2341.     return pred;

  2342. }

  2343. 

  2344. /**

  2345.  * Decode one AC coefficient

  2346.  * @param v The VC1 context

  2347.  * @param last Last coefficient

  2348.  * @param skip How much zero coefficients to skip

  2349.  * @param value Decoded AC coefficient value

  2350.  * @see 8.1.3.4

  2351.  */

  2352. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2353. {

  2354.     GetBitContext *gb = &v->s.gb;

  2355.     int index, escape, run = 0, level = 0, lst = 0;

  2356. 

  2357.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2358.     if (index != vc1_ac_sizes[codingset] - 1) {

  2359.         run = vc1_index_decode_table[codingset][index][0];

  2360.         level = vc1_index_decode_table[codingset][index][1];

  2361.         lst = index >= vc1_last_decode_table[codingset];

  2362.         if(get_bits1(gb))

  2363.             level = -level;

  2364.     } else {

  2365.         escape = decode210(gb);

  2366.         if (escape != 2) {

  2367.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2368.             run = vc1_index_decode_table[codingset][index][0];

  2369.             level = vc1_index_decode_table[codingset][index][1];

  2370.             lst = index >= vc1_last_decode_table[codingset];

  2371.             if(escape == 0) {

  2372.                 if(lst)

  2373.                     level += vc1_last_delta_level_table[codingset][run];

  2374.                 else

  2375.                     level += vc1_delta_level_table[codingset][run];

  2376.             } else {

  2377.                 if(lst)

  2378.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2379.                 else

  2380.                     run += vc1_delta_run_table[codingset][level] + 1;

  2381.             }

  2382.             if(get_bits1(gb))

  2383.                 level = -level;

  2384.         } else {

  2385.             int sign;

  2386.             lst = get_bits1(gb);

  2387.             if(v->s.esc3_level_length == 0) {

  2388.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2389.                     v->s.esc3_level_length = get_bits(gb, 3);

  2390.                     if(!v->s.esc3_level_length)

  2391.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2392.                 } else { //table 60

  2393.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2394.                 }

  2395.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2396.             }

  2397.             run = get_bits(gb, v->s.esc3_run_length);

  2398.             sign = get_bits1(gb);

  2399.             level = get_bits(gb, v->s.esc3_level_length);

  2400.             if(sign)

  2401.                 level = -level;

  2402.         }

  2403.     }

  2404. 

  2405.     *last = lst;

  2406.     *skip = run;

  2407.     *value = level;

  2408. }

  2409. 

  2410. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2411.  * @param v VC1Context

  2412.  * @param block block to decode

  2413.  * @param coded are AC coeffs present or not

  2414.  * @param codingset set of VLC to decode data

  2415.  */

  2416. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2417. {

  2418.     GetBitContext *gb = &v->s.gb;

  2419.     MpegEncContext *s = &v->s;

  2420.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2421.     int run_diff, i;

  2422.     int16_t *dc_val;

  2423.     int16_t *ac_val, *ac_val2;

  2424.     int dcdiff;

  2425. 

  2426.     /* Get DC differential */

  2427.     if (n < 4) {

  2428.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2429.     } else {

  2430.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2431.     }

  2432.     if (dcdiff < 0){

  2433.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2434.         return -1;

  2435.     }

  2436.     if (dcdiff)

  2437.     {

  2438.         if (dcdiff == 119 /* ESC index value */)

  2439.         {

  2440.             /* TODO: Optimize */

  2441.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2442.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2443.             else dcdiff = get_bits(gb, 8);

  2444.         }

  2445.         else

  2446.         {

  2447.             if (v->pq == 1)

  2448.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2449.             else if (v->pq == 2)

  2450.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2451.         }

  2452.         if (get_bits1(gb))

  2453.             dcdiff = -dcdiff;

  2454.     }

  2455. 

  2456.     /* Prediction */

  2457.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2458.     *dc_val = dcdiff;

  2459. 

  2460.     /* Store the quantized DC coeff, used for prediction */

  2461.     if (n < 4) {

  2462.         block[0] = dcdiff * s->y_dc_scale;

  2463.     } else {

  2464.         block[0] = dcdiff * s->c_dc_scale;

  2465.     }

  2466.     /* Skip ? */

  2467.     run_diff = 0;

  2468.     i = 0;

  2469.     if (!coded) {

  2470.         goto not_coded;

  2471.     }

  2472. 

  2473.     //AC Decoding

  2474.     i = 1;

  2475. 

  2476.     {

  2477.         int last = 0, skip, value;

  2478.         const int8_t *zz_table;

  2479.         int scale;

  2480.         int k;

  2481. 

  2482.         scale = v->pq * 2 + v->halfpq;

  2483. 

  2484.         if(v->s.ac_pred) {

  2485.             if(!dc_pred_dir)

  2486.                 zz_table = wmv1_scantable[2];

  2487.             else

  2488.                 zz_table = wmv1_scantable[3];

  2489.         } else

  2490.             zz_table = wmv1_scantable[1];

  2491. 

  2492.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2493.         ac_val2 = ac_val;

  2494.         if(dc_pred_dir) //left

  2495.             ac_val -= 16;

  2496.         else //top

  2497.             ac_val -= 16 * s->block_wrap[n];

  2498. 

  2499.         while (!last) {

  2500.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2501.             i += skip;

  2502.             if(i > 63)

  2503.                 break;

  2504.             block[zz_table[i++]] = value;

  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];

  2512.             } else { //top

  2513.                 for(k = 1; k < 8; k++)

  2514.                     block[k] += ac_val[k + 8];

  2515.             }

  2516.         }

  2517.         /* save AC coeffs for further prediction */

  2518.         for(k = 1; k < 8; k++) {

  2519.             ac_val2[k] = block[k << 3];

  2520.             ac_val2[k + 8] = block[k];

  2521.         }

  2522. 

  2523.         /* scale AC coeffs */

  2524.         for(k = 1; k < 64; k++)

  2525.             if(block[k]) {

  2526.                 block[k] *= scale;

  2527.                 if(!v->pquantizer)

  2528.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2529.             }

  2530. 

  2531.         if(s->ac_pred) i = 63;

  2532.     }

  2533. 

  2534. not_coded:

  2535.     if(!coded) {

  2536.         int k, scale;

  2537.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2538.         ac_val2 = ac_val;

  2539. 

  2540.         scale = v->pq * 2 + v->halfpq;

  2541.         memset(ac_val2, 0, 16 * 2);

  2542.         if(dc_pred_dir) {//left

  2543.             ac_val -= 16;

  2544.             if(s->ac_pred)

  2545.                 memcpy(ac_val2, ac_val, 8 * 2);

  2546.         } else {//top

  2547.             ac_val -= 16 * s->block_wrap[n];

  2548.             if(s->ac_pred)

  2549.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2550.         }

  2551. 

  2552.         /* apply AC prediction if needed */

  2553.         if(s->ac_pred) {

  2554.             if(dc_pred_dir) { //left

  2555.                 for(k = 1; k < 8; k++) {

  2556.                     block[k << 3] = ac_val[k] * scale;

  2557.                     if(!v->pquantizer && block[k << 3])

  2558.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2559.                 }

  2560.             } else { //top

  2561.                 for(k = 1; k < 8; k++) {

  2562.                     block[k] = ac_val[k + 8] * scale;

  2563.                     if(!v->pquantizer && block[k])

  2564.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2565.                 }

  2566.             }

  2567.             i = 63;

  2568.         }

  2569.     }

  2570.     s->block_last_index[n] = i;

  2571. 

  2572.     return 0;

  2573. }

  2574. 

  2575. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2576.  * @param v VC1Context

  2577.  * @param block block to decode

  2578.  * @param coded are AC coeffs present or not

  2579.  * @param codingset set of VLC to decode data

  2580.  */

  2581. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2582. {

  2583.     GetBitContext *gb = &v->s.gb;

  2584.     MpegEncContext *s = &v->s;

  2585.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2586.     int run_diff, i;

  2587.     int16_t *dc_val;

  2588.     int16_t *ac_val, *ac_val2;

  2589.     int dcdiff;

  2590.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2591.     int use_pred = s->ac_pred;

  2592.     int scale;

  2593.     int q1, q2 = 0;

  2594.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2595. 

  2596.     /* Get DC differential */

  2597.     if (n < 4) {

  2598.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2599.     } else {

  2600.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2601.     }

  2602.     if (dcdiff < 0){

  2603.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2604.         return -1;

  2605.     }

  2606.     if (dcdiff)

  2607.     {

  2608.         if (dcdiff == 119 /* ESC index value */)

  2609.         {

  2610.             /* TODO: Optimize */

  2611.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2612.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2613.             else dcdiff = get_bits(gb, 8);

  2614.         }

  2615.         else

  2616.         {

  2617.             if (mquant == 1)

  2618.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2619.             else if (mquant == 2)

  2620.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2621.         }

  2622.         if (get_bits1(gb))

  2623.             dcdiff = -dcdiff;

  2624.     }

  2625. 

  2626.     /* Prediction */

  2627.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2628.     *dc_val = dcdiff;

  2629. 

  2630.     /* Store the quantized DC coeff, used for prediction */

  2631.     if (n < 4) {

  2632.         block[0] = dcdiff * s->y_dc_scale;

  2633.     } else {

  2634.         block[0] = dcdiff * s->c_dc_scale;

  2635.     }

  2636.     /* Skip ? */

  2637.     run_diff = 0;

  2638.     i = 0;

  2639. 

  2640.     //AC Decoding

  2641.     i = 1;

  2642. 

  2643.     /* check if AC is needed at all */

  2644.     if(!a_avail && !c_avail) use_pred = 0;

  2645.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2646.     ac_val2 = ac_val;

  2647. 

  2648.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2649. 

  2650.     if(dc_pred_dir) //left

  2651.         ac_val -= 16;

  2652.     else //top

  2653.         ac_val -= 16 * s->block_wrap[n];

  2654. 

  2655.     q1 = s->current_picture.qscale_table[mb_pos];

  2656.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2657.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2658.     if(dc_pred_dir && n==1) q2 = q1;

  2659.     if(!dc_pred_dir && n==2) q2 = q1;

  2660.     if(n==3) q2 = q1;

  2661. 

  2662.     if(coded) {

  2663.         int last = 0, skip, value;

  2664.         const int8_t *zz_table;

  2665.         int k;

  2666. 

  2667.         if(v->s.ac_pred) {

  2668.             if(!dc_pred_dir)

  2669.                 zz_table = wmv1_scantable[2];

  2670.             else

  2671.                 zz_table = wmv1_scantable[3];

  2672.         } else

  2673.             zz_table = wmv1_scantable[1];

  2674. 

  2675.         while (!last) {

  2676.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2677.             i += skip;

  2678.             if(i > 63)

  2679.                 break;

  2680.             block[zz_table[i++]] = value;

  2681.         }

  2682. 

  2683.         /* apply AC prediction if needed */

  2684.         if(use_pred) {

  2685.             /* scale predictors if needed*/

  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. 

  2690.                 if(dc_pred_dir) { //left

  2691.                     for(k = 1; k < 8; k++)

  2692.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2693.                 } else { //top

  2694.                     for(k = 1; k < 8; k++)

  2695.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2696.                 }

  2697.             } else {

  2698.                 if(dc_pred_dir) { //left

  2699.                     for(k = 1; k < 8; k++)

  2700.                         block[k << 3] += ac_val[k];

  2701.                 } else { //top

  2702.                     for(k = 1; k < 8; k++)

  2703.                         block[k] += ac_val[k + 8];

  2704.                 }

  2705.             }

  2706.         }

  2707.         /* save AC coeffs for further prediction */

  2708.         for(k = 1; k < 8; k++) {

  2709.             ac_val2[k] = block[k << 3];

  2710.             ac_val2[k + 8] = block[k];

  2711.         }

  2712. 

  2713.         /* scale AC coeffs */

  2714.         for(k = 1; k < 64; k++)

  2715.             if(block[k]) {

  2716.                 block[k] *= scale;

  2717.                 if(!v->pquantizer)

  2718.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2719.             }

  2720. 

  2721.         if(use_pred) i = 63;

  2722.     } else { // no AC coeffs

  2723.         int k;

  2724. 

  2725.         memset(ac_val2, 0, 16 * 2);

  2726.         if(dc_pred_dir) {//left

  2727.             if(use_pred) {

  2728.                 memcpy(ac_val2, ac_val, 8 * 2);

  2729.                 if(q2 && q1!=q2) {

  2730.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2731.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2732.                     for(k = 1; k < 8; k++)

  2733.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2734.                 }

  2735.             }

  2736.         } else {//top

  2737.             if(use_pred) {

  2738.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2739.                 if(q2 && q1!=q2) {

  2740.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2741.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2742.                     for(k = 1; k < 8; k++)

  2743.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2744.                 }

  2745.             }

  2746.         }

  2747. 

  2748.         /* apply AC prediction if needed */

  2749.         if(use_pred) {

  2750.             if(dc_pred_dir) { //left

  2751.                 for(k = 1; k < 8; k++) {

  2752.                     block[k << 3] = ac_val2[k] * scale;

  2753.                     if(!v->pquantizer && block[k << 3])

  2754.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2755.                 }

  2756.             } else { //top

  2757.                 for(k = 1; k < 8; k++) {

  2758.                     block[k] = ac_val2[k + 8] * scale;

  2759.                     if(!v->pquantizer && block[k])

  2760.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2761.                 }

  2762.             }

  2763.             i = 63;

  2764.         }

  2765.     }

  2766.     s->block_last_index[n] = i;

  2767. 

  2768.     return 0;

  2769. }

  2770. 

  2771. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2772.  * @param v VC1Context

  2773.  * @param block block to decode

  2774.  * @param coded are AC coeffs present or not

  2775.  * @param mquant block quantizer

  2776.  * @param codingset set of VLC to decode data

  2777.  */

  2778. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2779. {

  2780.     GetBitContext *gb = &v->s.gb;

  2781.     MpegEncContext *s = &v->s;

  2782.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2783.     int run_diff, i;

  2784.     int16_t *dc_val;

  2785.     int16_t *ac_val, *ac_val2;

  2786.     int dcdiff;

  2787.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2788.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2789.     int use_pred = s->ac_pred;

  2790.     int scale;

  2791.     int q1, q2 = 0;

  2792. 

  2793.     /* XXX: Guard against dumb values of mquant */

  2794.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2795. 

  2796.     /* Set DC scale - y and c use the same */

  2797.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2798.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2799. 

  2800.     /* Get DC differential */

  2801.     if (n < 4) {

  2802.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2803.     } else {

  2804.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2805.     }

  2806.     if (dcdiff < 0){

  2807.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2808.         return -1;

  2809.     }

  2810.     if (dcdiff)

  2811.     {

  2812.         if (dcdiff == 119 /* ESC index value */)

  2813.         {

  2814.             /* TODO: Optimize */

  2815.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2816.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2817.             else dcdiff = get_bits(gb, 8);

  2818.         }

  2819.         else

  2820.         {

  2821.             if (mquant == 1)

  2822.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2823.             else if (mquant == 2)

  2824.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2825.         }

  2826.         if (get_bits1(gb))

  2827.             dcdiff = -dcdiff;

  2828.     }

  2829. 

  2830.     /* Prediction */

  2831.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2832.     *dc_val = dcdiff;

  2833. 

  2834.     /* Store the quantized DC coeff, used for prediction */

  2835. 

  2836.     if (n < 4) {

  2837.         block[0] = dcdiff * s->y_dc_scale;

  2838.     } else {

  2839.         block[0] = dcdiff * s->c_dc_scale;

  2840.     }

  2841.     /* Skip ? */

  2842.     run_diff = 0;

  2843.     i = 0;

  2844. 

  2845.     //AC Decoding

  2846.     i = 1;

  2847. 

  2848.     /* check if AC is needed at all and adjust direction if needed */

  2849.     if(!a_avail) dc_pred_dir = 1;

  2850.     if(!c_avail) dc_pred_dir = 0;

  2851.     if(!a_avail && !c_avail) use_pred = 0;

  2852.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2853.     ac_val2 = ac_val;

  2854. 

  2855.     scale = mquant * 2 + v->halfpq;

  2856. 

  2857.     if(dc_pred_dir) //left

  2858.         ac_val -= 16;

  2859.     else //top

  2860.         ac_val -= 16 * s->block_wrap[n];

  2861. 

  2862.     q1 = s->current_picture.qscale_table[mb_pos];

  2863.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2864.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2865.     if(dc_pred_dir && n==1) q2 = q1;

  2866.     if(!dc_pred_dir && n==2) q2 = q1;

  2867.     if(n==3) q2 = q1;

  2868. 

  2869.     if(coded) {

  2870.         int last = 0, skip, value;

  2871.         const int8_t *zz_table;

  2872.         int k;

  2873. 

  2874.         zz_table = wmv1_scantable[0];

  2875. 

  2876.         while (!last) {

  2877.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2878.             i += skip;

  2879.             if(i > 63)

  2880.                 break;

  2881.             block[zz_table[i++]] = value;

  2882.         }

  2883. 

  2884.         /* apply AC prediction if needed */

  2885.         if(use_pred) {

  2886.             /* scale predictors if needed*/

  2887.             if(q2 && q1!=q2) {

  2888.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2889.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2890. 

  2891.                 if(dc_pred_dir) { //left

  2892.                     for(k = 1; k < 8; k++)

  2893.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2894.                 } else { //top

  2895.                     for(k = 1; k < 8; k++)

  2896.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2897.                 }

  2898.             } else {

  2899.                 if(dc_pred_dir) { //left

  2900.                     for(k = 1; k < 8; k++)

  2901.                         block[k << 3] += ac_val[k];

  2902.                 } else { //top

  2903.                     for(k = 1; k < 8; k++)

  2904.                         block[k] += ac_val[k + 8];

  2905.                 }

  2906.             }

  2907.         }

  2908.         /* save AC coeffs for further prediction */

  2909.         for(k = 1; k < 8; k++) {

  2910.             ac_val2[k] = block[k << 3];

  2911.             ac_val2[k + 8] = block[k];

  2912.         }

  2913. 

  2914.         /* scale AC coeffs */

  2915.         for(k = 1; k < 64; k++)

  2916.             if(block[k]) {

  2917.                 block[k] *= scale;

  2918.                 if(!v->pquantizer)

  2919.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2920.             }

  2921. 

  2922.         if(use_pred) i = 63;

  2923.     } else { // no AC coeffs

  2924.         int k;

  2925. 

  2926.         memset(ac_val2, 0, 16 * 2);

  2927.         if(dc_pred_dir) {//left

  2928.             if(use_pred) {

  2929.                 memcpy(ac_val2, ac_val, 8 * 2);

  2930.                 if(q2 && q1!=q2) {

  2931.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2932.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2933.                     for(k = 1; k < 8; k++)

  2934.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2935.                 }

  2936.             }

  2937.         } else {//top

  2938.             if(use_pred) {

  2939.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2940.                 if(q2 && q1!=q2) {

  2941.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2942.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2943.                     for(k = 1; k < 8; k++)

  2944.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2945.                 }

  2946.             }

  2947.         }

  2948. 

  2949.         /* apply AC prediction if needed */

  2950.         if(use_pred) {

  2951.             if(dc_pred_dir) { //left

  2952.                 for(k = 1; k < 8; k++) {

  2953.                     block[k << 3] = ac_val2[k] * scale;

  2954.                     if(!v->pquantizer && block[k << 3])

  2955.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2956.                 }

  2957.             } else { //top

  2958.                 for(k = 1; k < 8; k++) {

  2959.                     block[k] = ac_val2[k + 8] * scale;

  2960.                     if(!v->pquantizer && block[k])

  2961.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2962.                 }

  2963.             }

  2964.             i = 63;

  2965.         }

  2966.     }

  2967.     s->block_last_index[n] = i;

  2968. 

  2969.     return 0;

  2970. }

  2971. 

  2972. /** Decode P block

  2973.  */

  2974. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,

  2975.                               uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left)

  2976. {

  2977.     MpegEncContext *s = &v->s;

  2978.     GetBitContext *gb = &s->gb;

  2979.     int i, j;

  2980.     int subblkpat = 0;

  2981.     int scale, off, idx, last, skip, value;

  2982.     int ttblk = ttmb & 7;

  2983.     int pat = 0;

  2984. 

  2985.     if(ttmb == -1) {

  2986.         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)];

  2987.     }

  2988.     if(ttblk == TT_4X4) {

  2989.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  2990.     }

  2991.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  2992.         subblkpat = decode012(gb);

  2993.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  2994.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  2995.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  2996.     }

  2997.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  2998. 

  2999.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  3000.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  3001.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  3002.         ttblk = TT_8X4;

  3003.     }

  3004.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  3005.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  3006.         ttblk = TT_4X8;

  3007.     }

  3008.     switch(ttblk) {

  3009.     case TT_8X8:

  3010.         pat = 0xF;

  3011.         i = 0;

  3012.         last = 0;

  3013.         while (!last) {

  3014.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3015.             i += skip;

  3016.             if(i > 63)

  3017.                 break;

  3018.             idx = wmv1_scantable[0][i++];

  3019.             block[idx] = value * scale;

  3020.             if(!v->pquantizer)

  3021.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3022.         }

  3023.         if(!skip_block){

  3024.             s->dsp.vc1_inv_trans_8x8(block);

  3025.             s->dsp.add_pixels_clamped(block, dst, linesize);

  3026.             if(apply_filter && cbp_top  & 0xC)

  3027.                 vc1_loop_filter(dst, 1, linesize, 8, mquant);

  3028.             if(apply_filter && cbp_left & 0xA)

  3029.                 vc1_loop_filter(dst, linesize, 1, 8, mquant);

  3030.         }

  3031.         break;

  3032.     case TT_4X4:

  3033.         pat = ~subblkpat & 0xF;

  3034.         for(j = 0; j < 4; j++) {

  3035.             last = subblkpat & (1 << (3 - j));

  3036.             i = 0;

  3037.             off = (j & 1) * 4 + (j & 2) * 16;

  3038.             while (!last) {

  3039.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3040.                 i += skip;

  3041.                 if(i > 15)

  3042.                     break;

  3043.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3044.                 block[idx + off] = value * scale;

  3045.                 if(!v->pquantizer)

  3046.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3047.             }

  3048.             if(!(subblkpat & (1 << (3 - j))) && !skip_block){

  3049.                 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);

  3050.                 if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2)))))

  3051.                     vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, 1, linesize, 4, mquant);

  3052.                 if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1)))))

  3053.                     vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, linesize, 1, 4, mquant);

  3054.             }

  3055.         }

  3056.         break;

  3057.     case TT_8X4:

  3058.         pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF;

  3059.         for(j = 0; j < 2; j++) {

  3060.             last = subblkpat & (1 << (1 - j));

  3061.             i = 0;

  3062.             off = j * 32;

  3063.             while (!last) {

  3064.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3065.                 i += skip;

  3066.                 if(i > 31)

  3067.                     break;

  3068.                 idx = v->zz_8x4[i++]+off;

  3069.                 block[idx] = value * scale;

  3070.                 if(!v->pquantizer)

  3071.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3072.             }

  3073.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3074.                 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);

  3075.                 if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC))

  3076.                     vc1_loop_filter(dst + j*4*linesize, 1, linesize, 8, mquant);

  3077.                 if(apply_filter && cbp_left & (2 << j))

  3078.                     vc1_loop_filter(dst + j*4*linesize, linesize, 1, 4, mquant);

  3079.             }

  3080.         }

  3081.         break;

  3082.     case TT_4X8:

  3083.         pat = ~(subblkpat*5) & 0xF;

  3084.         for(j = 0; j < 2; j++) {

  3085.             last = subblkpat & (1 << (1 - j));

  3086.             i = 0;

  3087.             off = j * 4;

  3088.             while (!last) {

  3089.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3090.                 i += skip;

  3091.                 if(i > 31)

  3092.                     break;

  3093.                 idx = v->zz_4x8[i++]+off;

  3094.                 block[idx] = value * scale;

  3095.                 if(!v->pquantizer)

  3096.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3097.             }

  3098.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3099.                 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3100.                 if(apply_filter && cbp_top & (2 << j))

  3101.                     vc1_loop_filter(dst + j*4, 1, linesize, 4, mquant);

  3102.                 if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA))

  3103.                     vc1_loop_filter(dst + j*4, linesize, 1, 8, mquant);

  3104.             }

  3105.         }

  3106.         break;

  3107.     }

  3108.     return pat;

  3109. }

  3110. 

  3111. 

  3112. /** Decode one P-frame MB (in Simple/Main profile)

  3113.  */

  3114. static int vc1_decode_p_mb(VC1Context *v)

  3115. {

  3116.     MpegEncContext *s = &v->s;

  3117.     GetBitContext *gb = &s->gb;

  3118.     int i, j;

  3119.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3120.     int cbp; /* cbp decoding stuff */

  3121.     int mqdiff, mquant; /* MB quantization */

  3122.     int ttmb = v->ttfrm; /* MB Transform type */

  3123. 

  3124.     static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },

  3125.       offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3126.     int mb_has_coeffs = 1; /* last_flag */

  3127.     int dmv_x, dmv_y; /* Differential MV components */

  3128.     int index, index1; /* LUT indexes */

  3129.     int val, sign; /* temp values */

  3130.     int first_block = 1;

  3131.     int dst_idx, off;

  3132.     int skipped, fourmv;

  3133.     int block_cbp = 0, pat;

  3134.     int apply_loop_filter;

  3135. 

  3136.     mquant = v->pq; /* Loosy initialization */

  3137. 

  3138.     if (v->mv_type_is_raw)

  3139.         fourmv = get_bits1(gb);

  3140.     else

  3141.         fourmv = v->mv_type_mb_plane[mb_pos];

  3142.     if (v->skip_is_raw)

  3143.         skipped = get_bits1(gb);

  3144.     else

  3145.         skipped = v->s.mbskip_table[mb_pos];

  3146. 

  3147.     s->dsp.clear_blocks(s->block[0]);

  3148. 

  3149.     apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  3150.     if (!fourmv) /* 1MV mode */

  3151.     {

  3152.         if (!skipped)

  3153.         {

  3154.             GET_MVDATA(dmv_x, dmv_y);

  3155. 

  3156.             if (s->mb_intra) {

  3157.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3158.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3159.             }

  3160.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3161.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3162. 

  3163.             /* FIXME Set DC val for inter block ? */

  3164.             if (s->mb_intra && !mb_has_coeffs)

  3165.             {

  3166.                 GET_MQUANT();

  3167.                 s->ac_pred = get_bits1(gb);

  3168.                 cbp = 0;

  3169.             }

  3170.             else if (mb_has_coeffs)

  3171.             {

  3172.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3173.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3174.                 GET_MQUANT();

  3175.             }

  3176.             else

  3177.             {

  3178.                 mquant = v->pq;

  3179.                 cbp = 0;

  3180.             }

  3181.             s->current_picture.qscale_table[mb_pos] = mquant;

  3182. 

  3183.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3184.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3185.                                 VC1_TTMB_VLC_BITS, 2);

  3186.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3187.             dst_idx = 0;

  3188.             for (i=0; i<6; i++)

  3189.             {

  3190.                 s->dc_val[0][s->block_index[i]] = 0;

  3191.                 dst_idx += i >> 2;

  3192.                 val = ((cbp >> (5 - i)) & 1);

  3193.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3194.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3195.                 if(s->mb_intra) {

  3196.                     /* check if prediction blocks A and C are available */

  3197.                     v->a_avail = v->c_avail = 0;

  3198.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3199.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3200.                     if(i == 1 || i == 3 || s->mb_x)

  3201.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3202. 

  3203.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3204.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3205.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3206.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3207.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3208.                     if(v->pq >= 9 && v->overlap) {

  3209.                         if(v->c_avail)

  3210.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3211.                         if(v->a_avail)

  3212.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3213.                     }

  3214.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3215.                         int left_cbp, top_cbp;

  3216.                         if(i & 4){

  3217.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3218.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3219.                         }else{

  3220.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3221.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3222.                         }

  3223.                         if(left_cbp & 0xC)

  3224.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3225.                         if(top_cbp  & 0xA)

  3226.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3227.                     }

  3228.                     block_cbp |= 0xF << (i << 2);

  3229.                 } else if(val) {

  3230.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3231.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3232.                         filter = 1;

  3233.                         if(i & 4){

  3234.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3235.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3236.                         }else{

  3237.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3238.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3239.                         }

  3240.                         if(left_cbp & 0xC)

  3241.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3242.                         if(top_cbp  & 0xA)

  3243.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3244.                     }

  3245.                     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);

  3246.                     block_cbp |= pat << (i << 2);

  3247.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3248.                     first_block = 0;

  3249.                 }

  3250.             }

  3251.         }

  3252.         else //Skipped

  3253.         {

  3254.             s->mb_intra = 0;

  3255.             for(i = 0; i < 6; i++) {

  3256.                 v->mb_type[0][s->block_index[i]] = 0;

  3257.                 s->dc_val[0][s->block_index[i]] = 0;

  3258.             }

  3259.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3260.             s->current_picture.qscale_table[mb_pos] = 0;

  3261.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3262.             vc1_mc_1mv(v, 0);

  3263.             return 0;

  3264.         }

  3265.     } //1MV mode

  3266.     else //4MV mode

  3267.     {

  3268.         if (!skipped /* unskipped MB */)

  3269.         {

  3270.             int intra_count = 0, coded_inter = 0;

  3271.             int is_intra[6], is_coded[6];

  3272.             /* Get CBPCY */

  3273.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3274.             for (i=0; i<6; i++)

  3275.             {

  3276.                 val = ((cbp >> (5 - i)) & 1);

  3277.                 s->dc_val[0][s->block_index[i]] = 0;

  3278.                 s->mb_intra = 0;

  3279.                 if(i < 4) {

  3280.                     dmv_x = dmv_y = 0;

  3281.                     s->mb_intra = 0;

  3282.                     mb_has_coeffs = 0;

  3283.                     if(val) {

  3284.                         GET_MVDATA(dmv_x, dmv_y);

  3285.                     }

  3286.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3287.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3288.                     intra_count += s->mb_intra;

  3289.                     is_intra[i] = s->mb_intra;

  3290.                     is_coded[i] = mb_has_coeffs;

  3291.                 }

  3292.                 if(i&4){

  3293.                     is_intra[i] = (intra_count >= 3);

  3294.                     is_coded[i] = val;

  3295.                 }

  3296.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3297.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3298.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3299.             }

  3300.             // if there are no coded blocks then don't do anything more

  3301.             if(!intra_count && !coded_inter) return 0;

  3302.             dst_idx = 0;

  3303.             GET_MQUANT();

  3304.             s->current_picture.qscale_table[mb_pos] = mquant;

  3305.             /* test if block is intra and has pred */

  3306.             {

  3307.                 int intrapred = 0;

  3308.                 for(i=0; i<6; i++)

  3309.                     if(is_intra[i]) {

  3310.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3311.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3312.                             intrapred = 1;

  3313.                             break;

  3314.                         }

  3315.                     }

  3316.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3317.                 else s->ac_pred = 0;

  3318.             }

  3319.             if (!v->ttmbf && coded_inter)

  3320.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3321.             for (i=0; i<6; i++)

  3322.             {

  3323.                 dst_idx += i >> 2;

  3324.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3325.                 s->mb_intra = is_intra[i];

  3326.                 if (is_intra[i]) {

  3327.                     /* check if prediction blocks A and C are available */

  3328.                     v->a_avail = v->c_avail = 0;

  3329.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3330.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3331.                     if(i == 1 || i == 3 || s->mb_x)

  3332.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3333. 

  3334.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3335.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3336.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3337.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3338.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3339.                     if(v->pq >= 9 && v->overlap) {

  3340.                         if(v->c_avail)

  3341.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3342.                         if(v->a_avail)

  3343.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3344.                     }

  3345.                     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)){

  3346.                         int left_cbp, top_cbp;

  3347.                         if(i & 4){

  3348.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3349.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3350.                         }else{

  3351.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3352.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3353.                         }

  3354.                         if(left_cbp & 0xC)

  3355.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3356.                         if(top_cbp  & 0xA)

  3357.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3358.                     }

  3359.                     block_cbp |= 0xF << (i << 2);

  3360.                 } else if(is_coded[i]) {

  3361.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3362.                     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)){

  3363.                         filter = 1;

  3364.                         if(i & 4){

  3365.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3366.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3367.                         }else{

  3368.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3369.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3370.                         }

  3371.                         if(left_cbp & 0xC)

  3372.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3373.                         if(top_cbp  & 0xA)

  3374.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3375.                     }

  3376.                     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);

  3377.                     block_cbp |= pat << (i << 2);

  3378.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3379.                     first_block = 0;

  3380.                 }

  3381.             }

  3382.             return 0;

  3383.         }

  3384.         else //Skipped MB

  3385.         {

  3386.             s->mb_intra = 0;

  3387.             s->current_picture.qscale_table[mb_pos] = 0;

  3388.             for (i=0; i<6; i++) {

  3389.                 v->mb_type[0][s->block_index[i]] = 0;

  3390.                 s->dc_val[0][s->block_index[i]] = 0;

  3391.             }

  3392.             for (i=0; i<4; i++)

  3393.             {

  3394.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3395.                 vc1_mc_4mv_luma(v, i);

  3396.             }

  3397.             vc1_mc_4mv_chroma(v);

  3398.             s->current_picture.qscale_table[mb_pos] = 0;

  3399.             return 0;

  3400.         }

  3401.     }

  3402.     v->cbp[s->mb_x] = block_cbp;

  3403. 

  3404.     /* Should never happen */

  3405.     return -1;

  3406. }

  3407. 

  3408. /** Decode one B-frame MB (in Main profile)

  3409.  */

  3410. static void vc1_decode_b_mb(VC1Context *v)

  3411. {

  3412.     MpegEncContext *s = &v->s;

  3413.     GetBitContext *gb = &s->gb;

  3414.     int i, j;

  3415.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3416.     int cbp = 0; /* cbp decoding stuff */

  3417.     int mqdiff, mquant; /* MB quantization */

  3418.     int ttmb = v->ttfrm; /* MB Transform type */

  3419. 

  3420.     static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },

  3421.       offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3422.     int mb_has_coeffs = 0; /* last_flag */

  3423.     int index, index1; /* LUT indexes */

  3424.     int val, sign; /* temp values */

  3425.     int first_block = 1;

  3426.     int dst_idx, off;

  3427.     int skipped, direct;

  3428.     int dmv_x[2], dmv_y[2];

  3429.     int bmvtype = BMV_TYPE_BACKWARD;

  3430. 

  3431.     mquant = v->pq; /* Loosy initialization */

  3432.     s->mb_intra = 0;

  3433. 

  3434.     if (v->dmb_is_raw)

  3435.         direct = get_bits1(gb);

  3436.     else

  3437.         direct = v->direct_mb_plane[mb_pos];

  3438.     if (v->skip_is_raw)

  3439.         skipped = get_bits1(gb);

  3440.     else

  3441.         skipped = v->s.mbskip_table[mb_pos];

  3442. 

  3443.     s->dsp.clear_blocks(s->block[0]);

  3444.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3445.     for(i = 0; i < 6; i++) {

  3446.         v->mb_type[0][s->block_index[i]] = 0;

  3447.         s->dc_val[0][s->block_index[i]] = 0;

  3448.     }

  3449.     s->current_picture.qscale_table[mb_pos] = 0;

  3450. 

  3451.     if (!direct) {

  3452.         if (!skipped) {

  3453.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3454.             dmv_x[1] = dmv_x[0];

  3455.             dmv_y[1] = dmv_y[0];

  3456.         }

  3457.         if(skipped || !s->mb_intra) {

  3458.             bmvtype = decode012(gb);

  3459.             switch(bmvtype) {

  3460.             case 0:

  3461.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3462.                 break;

  3463.             case 1:

  3464.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3465.                 break;

  3466.             case 2:

  3467.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3468.                 dmv_x[0] = dmv_y[0] = 0;

  3469.             }

  3470.         }

  3471.     }

  3472.     for(i = 0; i < 6; i++)

  3473.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3474. 

  3475.     if (skipped) {

  3476.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3477.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3478.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3479.         return;

  3480.     }

  3481.     if (direct) {

  3482.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3483.         GET_MQUANT();

  3484.         s->mb_intra = 0;

  3485.         mb_has_coeffs = 0;

  3486.         s->current_picture.qscale_table[mb_pos] = mquant;

  3487.         if(!v->ttmbf)

  3488.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3489.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3490.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3491.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3492.     } else {

  3493.         if(!mb_has_coeffs && !s->mb_intra) {

  3494.             /* no coded blocks - effectively skipped */

  3495.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3496.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3497.             return;

  3498.         }

  3499.         if(s->mb_intra && !mb_has_coeffs) {

  3500.             GET_MQUANT();

  3501.             s->current_picture.qscale_table[mb_pos] = mquant;

  3502.             s->ac_pred = get_bits1(gb);

  3503.             cbp = 0;

  3504.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3505.         } else {

  3506.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3507.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3508.                 if(!mb_has_coeffs) {

  3509.                     /* interpolated skipped block */

  3510.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3511.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3512.                     return;

  3513.                 }

  3514.             }

  3515.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3516.             if(!s->mb_intra) {

  3517.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3518.             }

  3519.             if(s->mb_intra)

  3520.                 s->ac_pred = get_bits1(gb);

  3521.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3522.             GET_MQUANT();

  3523.             s->current_picture.qscale_table[mb_pos] = mquant;

  3524.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3525.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3526.         }

  3527.     }

  3528.     dst_idx = 0;

  3529.     for (i=0; i<6; i++)

  3530.     {

  3531.         s->dc_val[0][s->block_index[i]] = 0;

  3532.         dst_idx += i >> 2;

  3533.         val = ((cbp >> (5 - i)) & 1);

  3534.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3535.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3536.         if(s->mb_intra) {

  3537.             /* check if prediction blocks A and C are available */

  3538.             v->a_avail = v->c_avail = 0;

  3539.             if(i == 2 || i == 3 || !s->first_slice_line)

  3540.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3541.             if(i == 1 || i == 3 || s->mb_x)

  3542.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3543. 

  3544.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3545.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3546.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3547.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3548.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3549.         } else if(val) {

  3550.             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);

  3551.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3552.             first_block = 0;

  3553.         }

  3554.     }

  3555. }

  3556. 

  3557. /** Decode blocks of I-frame

  3558.  */

  3559. static void vc1_decode_i_blocks(VC1Context *v)

  3560. {

  3561.     int k, j;

  3562.     MpegEncContext *s = &v->s;

  3563.     int cbp, val;

  3564.     uint8_t *coded_val;

  3565.     int mb_pos;

  3566. 

  3567.     /* select codingmode used for VLC tables selection */

  3568.     switch(v->y_ac_table_index){

  3569.     case 0:

  3570.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3571.         break;

  3572.     case 1:

  3573.         v->codingset = CS_HIGH_MOT_INTRA;

  3574.         break;

  3575.     case 2:

  3576.         v->codingset = CS_MID_RATE_INTRA;

  3577.         break;

  3578.     }

  3579. 

  3580.     switch(v->c_ac_table_index){

  3581.     case 0:

  3582.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3583.         break;

  3584.     case 1:

  3585.         v->codingset2 = CS_HIGH_MOT_INTER;

  3586.         break;

  3587.     case 2:

  3588.         v->codingset2 = CS_MID_RATE_INTER;

  3589.         break;

  3590.     }

  3591. 

  3592.     /* Set DC scale - y and c use the same */

  3593.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3594.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3595. 

  3596.     //do frame decode

  3597.     s->mb_x = s->mb_y = 0;

  3598.     s->mb_intra = 1;

  3599.     s->first_slice_line = 1;

  3600.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3601.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3602.             ff_init_block_index(s);

  3603.             ff_update_block_index(s);

  3604.             s->dsp.clear_blocks(s->block[0]);

  3605.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3606.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3607.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3608.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3609.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3610. 

  3611.             // do actual MB decoding and displaying

  3612.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3613.             v->s.ac_pred = get_bits1(&v->s.gb);

  3614. 

  3615.             for(k = 0; k < 6; k++) {

  3616.                 val = ((cbp >> (5 - k)) & 1);

  3617. 

  3618.                 if (k < 4) {

  3619.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3620.                     val = val ^ pred;

  3621.                     *coded_val = val;

  3622.                 }

  3623.                 cbp |= val << (5 - k);

  3624. 

  3625.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3626. 

  3627.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3628.                 if(v->pq >= 9 && v->overlap) {

  3629.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3630.                 }

  3631.             }

  3632. 

  3633.             vc1_put_block(v, s->block);

  3634.             if(v->pq >= 9 && v->overlap) {

  3635.                 if(s->mb_x) {

  3636.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3637.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3638.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3639.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3640.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3641.                     }

  3642.                 }

  3643.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3644.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3645.                 if(!s->first_slice_line) {

  3646.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3647.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3648.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3649.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3650.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3651.                     }

  3652.                 }

  3653.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3654.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3655.             }

  3656.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]);

  3657. 

  3658.             if(get_bits_count(&s->gb) > v->bits) {

  3659.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3660.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3661.                 return;

  3662.             }

  3663.         }

  3664.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3665.         s->first_slice_line = 0;

  3666.     }

  3667.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3668. }

  3669. 

  3670. /** Decode blocks of I-frame for advanced profile

  3671.  */

  3672. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3673. {

  3674.     int k, j;

  3675.     MpegEncContext *s = &v->s;

  3676.     int cbp, val;

  3677.     uint8_t *coded_val;

  3678.     int mb_pos;

  3679.     int mquant = v->pq;

  3680.     int mqdiff;

  3681.     int overlap;

  3682.     GetBitContext *gb = &s->gb;

  3683. 

  3684.     /* select codingmode used for VLC tables selection */

  3685.     switch(v->y_ac_table_index){

  3686.     case 0:

  3687.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3688.         break;

  3689.     case 1:

  3690.         v->codingset = CS_HIGH_MOT_INTRA;

  3691.         break;

  3692.     case 2:

  3693.         v->codingset = CS_MID_RATE_INTRA;

  3694.         break;

  3695.     }

  3696. 

  3697.     switch(v->c_ac_table_index){

  3698.     case 0:

  3699.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3700.         break;

  3701.     case 1:

  3702.         v->codingset2 = CS_HIGH_MOT_INTER;

  3703.         break;

  3704.     case 2:

  3705.         v->codingset2 = CS_MID_RATE_INTER;

  3706.         break;

  3707.     }

  3708. 

  3709.     //do frame decode

  3710.     s->mb_x = s->mb_y = 0;

  3711.     s->mb_intra = 1;

  3712.     s->first_slice_line = 1;

  3713.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3714.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3715.             ff_init_block_index(s);

  3716.             ff_update_block_index(s);

  3717.             s->dsp.clear_blocks(s->block[0]);

  3718.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3719.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3720.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3721.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3722. 

  3723.             // do actual MB decoding and displaying

  3724.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3725.             if(v->acpred_is_raw)

  3726.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3727.             else

  3728.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3729. 

  3730.             if(v->condover == CONDOVER_SELECT) {

  3731.                 if(v->overflg_is_raw)

  3732.                     overlap = get_bits1(&v->s.gb);

  3733.                 else

  3734.                     overlap = v->over_flags_plane[mb_pos];

  3735.             } else

  3736.                 overlap = (v->condover == CONDOVER_ALL);

  3737. 

  3738.             GET_MQUANT();

  3739. 

  3740.             s->current_picture.qscale_table[mb_pos] = mquant;

  3741.             /* Set DC scale - y and c use the same */

  3742.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3743.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3744. 

  3745.             for(k = 0; k < 6; k++) {

  3746.                 val = ((cbp >> (5 - k)) & 1);

  3747. 

  3748.                 if (k < 4) {

  3749.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3750.                     val = val ^ pred;

  3751.                     *coded_val = val;

  3752.                 }

  3753.                 cbp |= val << (5 - k);

  3754. 

  3755.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3756.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3757. 

  3758.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3759. 

  3760.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3761.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3762.             }

  3763. 

  3764.             vc1_put_block(v, s->block);

  3765.             if(overlap) {

  3766.                 if(s->mb_x) {

  3767.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3768.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3769.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3770.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3771.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3772.                     }

  3773.                 }

  3774.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3775.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3776.                 if(!s->first_slice_line) {

  3777.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3778.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3779.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3780.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3781.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3782.                     }

  3783.                 }

  3784.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3785.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3786.             }

  3787.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]);

  3788. 

  3789.             if(get_bits_count(&s->gb) > v->bits) {

  3790.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3791.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3792.                 return;

  3793.             }

  3794.         }

  3795.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3796.         s->first_slice_line = 0;

  3797.     }

  3798.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3799. }

  3800. 

  3801. static void vc1_decode_p_blocks(VC1Context *v)

  3802. {

  3803.     MpegEncContext *s = &v->s;

  3804. 

  3805.     /* select codingmode used for VLC tables selection */

  3806.     switch(v->c_ac_table_index){

  3807.     case 0:

  3808.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3809.         break;

  3810.     case 1:

  3811.         v->codingset = CS_HIGH_MOT_INTRA;

  3812.         break;

  3813.     case 2:

  3814.         v->codingset = CS_MID_RATE_INTRA;

  3815.         break;

  3816.     }

  3817. 

  3818.     switch(v->c_ac_table_index){

  3819.     case 0:

  3820.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3821.         break;

  3822.     case 1:

  3823.         v->codingset2 = CS_HIGH_MOT_INTER;

  3824.         break;

  3825.     case 2:

  3826.         v->codingset2 = CS_MID_RATE_INTER;

  3827.         break;

  3828.     }

  3829. 

  3830.     s->first_slice_line = 1;

  3831.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  3832.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3833.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3834.             ff_init_block_index(s);

  3835.             ff_update_block_index(s);

  3836.             s->dsp.clear_blocks(s->block[0]);

  3837. 

  3838.             vc1_decode_p_mb(v);

  3839.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3840.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3841.                 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);

  3842.                 return;

  3843.             }

  3844.         }

  3845.         memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride);

  3846.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3847.         s->first_slice_line = 0;

  3848.     }

  3849.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3850. }

  3851. 

  3852. static void vc1_decode_b_blocks(VC1Context *v)

  3853. {

  3854.     MpegEncContext *s = &v->s;

  3855. 

  3856.     /* select codingmode used for VLC tables selection */

  3857.     switch(v->c_ac_table_index){

  3858.     case 0:

  3859.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3860.         break;

  3861.     case 1:

  3862.         v->codingset = CS_HIGH_MOT_INTRA;

  3863.         break;

  3864.     case 2:

  3865.         v->codingset = CS_MID_RATE_INTRA;

  3866.         break;

  3867.     }

  3868. 

  3869.     switch(v->c_ac_table_index){

  3870.     case 0:

  3871.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3872.         break;

  3873.     case 1:

  3874.         v->codingset2 = CS_HIGH_MOT_INTER;

  3875.         break;

  3876.     case 2:

  3877.         v->codingset2 = CS_MID_RATE_INTER;

  3878.         break;

  3879.     }

  3880. 

  3881.     s->first_slice_line = 1;

  3882.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3883.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3884.             ff_init_block_index(s);

  3885.             ff_update_block_index(s);

  3886.             s->dsp.clear_blocks(s->block[0]);

  3887. 

  3888.             vc1_decode_b_mb(v);

  3889.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3890.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3891.                 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);

  3892.                 return;

  3893.             }

  3894.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[s->mb_x + s->mb_y *s->mb_stride]);

  3895.         }

  3896.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3897.         s->first_slice_line = 0;

  3898.     }

  3899.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3900. }

  3901. 

  3902. static void vc1_decode_skip_blocks(VC1Context *v)

  3903. {

  3904.     MpegEncContext *s = &v->s;

  3905. 

  3906.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3907.     s->first_slice_line = 1;

  3908.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3909.         s->mb_x = 0;

  3910.         ff_init_block_index(s);

  3911.         ff_update_block_index(s);

  3912.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3913.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3914.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3915.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3916.         s->first_slice_line = 0;

  3917.     }

  3918.     s->pict_type = FF_P_TYPE;

  3919. }

  3920. 

  3921. static void vc1_decode_blocks(VC1Context *v)

  3922. {

  3923. 

  3924.     v->s.esc3_level_length = 0;

  3925.     if(v->x8_type){

  3926.         ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );

  3927.     }else{

  3928. 

  3929.         switch(v->s.pict_type) {

  3930.         case FF_I_TYPE:

  3931.             if(v->profile == PROFILE_ADVANCED)

  3932.                 vc1_decode_i_blocks_adv(v);

  3933.             else

  3934.                 vc1_decode_i_blocks(v);

  3935.             break;

  3936.         case FF_P_TYPE:

  3937.             if(v->p_frame_skipped)

  3938.                 vc1_decode_skip_blocks(v);

  3939.             else

  3940.                 vc1_decode_p_blocks(v);

  3941.             break;

  3942.         case FF_B_TYPE:

  3943.             if(v->bi_type){

  3944.                 if(v->profile == PROFILE_ADVANCED)

  3945.                     vc1_decode_i_blocks_adv(v);

  3946.                 else

  3947.                     vc1_decode_i_blocks(v);

  3948.             }else

  3949.                 vc1_decode_b_blocks(v);

  3950.             break;

  3951.         }

  3952.     }

  3953. }

  3954. 

  3955. /** Find VC-1 marker in buffer

  3956.  * @return position where next marker starts or end of buffer if no marker found

  3957.  */

  3958. static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)

  3959. {

  3960.     uint32_t mrk = 0xFFFFFFFF;

  3961. 

  3962.     if(end-src < 4) return end;

  3963.     while(src < end){

  3964.         mrk = (mrk << 8) | *src++;

  3965.         if(IS_MARKER(mrk))

  3966.             return src-4;

  3967.     }

  3968.     return end;

  3969. }

  3970. 

  3971. static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)

  3972. {

  3973.     int dsize = 0, i;

  3974. 

  3975.     if(size < 4){

  3976.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  3977.         return size;

  3978.     }

  3979.     for(i = 0; i < size; i++, src++) {

  3980.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  3981.             dst[dsize++] = src[1];

  3982.             src++;

  3983.             i++;

  3984.         } else

  3985.             dst[dsize++] = *src;

  3986.     }

  3987.     return dsize;

  3988. }

  3989. 

  3990. /** Initialize a VC1/WMV3 decoder

  3991.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3992.  * @todo TODO: Decypher remaining bits in extra_data

  3993.  */

  3994. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  3995. {

  3996.     VC1Context *v = avctx->priv_data;

  3997.     MpegEncContext *s = &v->s;

  3998.     GetBitContext gb;

  3999. 

  4000.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  4001.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  4002.         avctx->pix_fmt = PIX_FMT_YUV420P;

  4003.     else

  4004.         avctx->pix_fmt = PIX_FMT_GRAY8;

  4005.     v->s.avctx = avctx;

  4006.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  4007.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  4008. 

  4009.     if(avctx->idct_algo==FF_IDCT_AUTO){

  4010.         avctx->idct_algo=FF_IDCT_WMV2;

  4011.     }

  4012. 

  4013.     if(ff_h263_decode_init(avctx) < 0)

  4014.         return -1;

  4015.     if (vc1_init_common(v) < 0) return -1;

  4016. 

  4017.     avctx->coded_width = avctx->width;

  4018.     avctx->coded_height = avctx->height;

  4019.     if (avctx->codec_id == CODEC_ID_WMV3)

  4020.     {

  4021.         int count = 0;

  4022. 

  4023.         // looks like WMV3 has a sequence header stored in the extradata

  4024.         // advanced sequence header may be before the first frame

  4025.         // the last byte of the extradata is a version number, 1 for the

  4026.         // samples we can decode

  4027. 

  4028.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  4029. 

  4030.         if (decode_sequence_header(avctx, &gb) < 0)

  4031.           return -1;

  4032. 

  4033.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  4034.         if (count>0)

  4035.         {

  4036.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  4037.                    count, get_bits(&gb, count));

  4038.         }

  4039.         else if (count < 0)

  4040.         {

  4041.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  4042.         }

  4043.     } else { // VC1/WVC1

  4044.         const uint8_t *start = avctx->extradata;

  4045.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  4046.         const uint8_t *next;

  4047.         int size, buf2_size;

  4048.         uint8_t *buf2 = NULL;

  4049.         int seq_initialized = 0, ep_initialized = 0;

  4050. 

  4051.         if(avctx->extradata_size < 16) {

  4052.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  4053.             return -1;

  4054.         }

  4055. 

  4056.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4057.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  4058.         next = start;

  4059.         for(; next < end; start = next){

  4060.             next = find_next_marker(start + 4, end);

  4061.             size = next - start - 4;

  4062.             if(size <= 0) continue;

  4063.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  4064.             init_get_bits(&gb, buf2, buf2_size * 8);

  4065.             switch(AV_RB32(start)){

  4066.             case VC1_CODE_SEQHDR:

  4067.                 if(decode_sequence_header(avctx, &gb) < 0){

  4068.                     av_free(buf2);

  4069.                     return -1;

  4070.                 }

  4071.                 seq_initialized = 1;

  4072.                 break;

  4073.             case VC1_CODE_ENTRYPOINT:

  4074.                 if(decode_entry_point(avctx, &gb) < 0){

  4075.                     av_free(buf2);

  4076.                     return -1;

  4077.                 }

  4078.                 ep_initialized = 1;

  4079.                 break;

  4080.             }

  4081.         }

  4082.         av_free(buf2);

  4083.         if(!seq_initialized || !ep_initialized){

  4084.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4085.             return -1;

  4086.         }

  4087.     }

  4088.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4089.     s->low_delay = !avctx->has_b_frames;

  4090. 

  4091.     s->mb_width = (avctx->coded_width+15)>>4;

  4092.     s->mb_height = (avctx->coded_height+15)>>4;

  4093. 

  4094.     /* Allocate mb bitplanes */

  4095.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4096.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4097.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4098.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4099. 

  4100.     v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  4101.     v->cbp = v->cbp_base + s->mb_stride;

  4102. 

  4103.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4104.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4105.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4106.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4107.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4108. 

  4109.     /* Init coded blocks info */

  4110.     if (v->profile == PROFILE_ADVANCED)

  4111.     {

  4112. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4113. //            return -1;

  4114. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4115. //            return -1;

  4116.     }

  4117. 

  4118.     ff_intrax8_common_init(&v->x8,s);

  4119.     return 0;

  4120. }

  4121. 

  4122. 

  4123. /** Decode a VC1/WMV3 frame

  4124.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4125.  */

  4126. static int vc1_decode_frame(AVCodecContext *avctx,

  4127.                             void *data, int *data_size,

  4128.                             const uint8_t *buf, int buf_size)

  4129. {

  4130.     VC1Context *v = avctx->priv_data;

  4131.     MpegEncContext *s = &v->s;

  4132.     AVFrame *pict = data;

  4133.     uint8_t *buf2 = NULL;

  4134.     const uint8_t *buf_vdpau = buf;

  4135. 

  4136.     /* no supplementary picture */

  4137.     if (buf_size == 0) {

  4138.         /* special case for last picture */

  4139.         if (s->low_delay==0 && s->next_picture_ptr) {

  4140.             *pict= *(AVFrame*)s->next_picture_ptr;

  4141.             s->next_picture_ptr= NULL;

  4142. 

  4143.             *data_size = sizeof(AVFrame);

  4144.         }

  4145. 

  4146.         return 0;

  4147.     }

  4148. 

  4149.     /* We need to set current_picture_ptr before reading the header,

  4150.      * otherwise we cannot store anything in there. */

  4151.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4152.         int i= ff_find_unused_picture(s, 0);

  4153.         s->current_picture_ptr= &s->picture[i];

  4154.     }

  4155. 

  4156.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){

  4157.         if (v->profile < PROFILE_ADVANCED)

  4158.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  4159.         else

  4160.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  4161.     }

  4162. 

  4163.     //for advanced profile we may need to parse and unescape data

  4164.     if (avctx->codec_id == CODEC_ID_VC1) {

  4165.         int buf_size2 = 0;

  4166.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4167. 

  4168.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4169.             const uint8_t *start, *end, *next;

  4170.             int size;

  4171. 

  4172.             next = buf;

  4173.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4174.                 next = find_next_marker(start + 4, end);

  4175.                 size = next - start - 4;

  4176.                 if(size <= 0) continue;

  4177.                 switch(AV_RB32(start)){

  4178.                 case VC1_CODE_FRAME:

  4179.                     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4180.                         buf_vdpau = start;

  4181.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4182.                     break;

  4183.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4184.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4185.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4186.                     decode_entry_point(avctx, &s->gb);

  4187.                     break;

  4188.                 case VC1_CODE_SLICE:

  4189.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4190.                     av_free(buf2);

  4191.                     return -1;

  4192.                 }

  4193.             }

  4194.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4195.             const uint8_t *divider;

  4196. 

  4197.             divider = find_next_marker(buf, buf + buf_size);

  4198.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4199.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4200.                 av_free(buf2);

  4201.                 return -1;

  4202.             }

  4203. 

  4204.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4205.             // TODO

  4206.             av_free(buf2);return -1;

  4207.         }else{

  4208.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4209.         }

  4210.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4211.     } else

  4212.         init_get_bits(&s->gb, buf, buf_size*8);

  4213.     // do parse frame header

  4214.     if(v->profile < PROFILE_ADVANCED) {

  4215.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4216.             av_free(buf2);

  4217.             return -1;

  4218.         }

  4219.     } else {

  4220.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4221.             av_free(buf2);

  4222.             return -1;

  4223.         }

  4224.     }

  4225. 

  4226.     if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){

  4227.         av_free(buf2);

  4228.         return -1;

  4229.     }

  4230. 

  4231.     // for hurry_up==5

  4232.     s->current_picture.pict_type= s->pict_type;

  4233.     s->current_picture.key_frame= s->pict_type == FF_I_TYPE;

  4234. 

  4235.     /* skip B-frames if we don't have reference frames */

  4236.     if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){

  4237.         av_free(buf2);

  4238.         return -1;//buf_size;

  4239.     }

  4240.     /* skip b frames if we are in a hurry */

  4241.     if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;

  4242.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)

  4243.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)

  4244.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4245.         av_free(buf2);

  4246.         return buf_size;

  4247.     }

  4248.     /* skip everything if we are in a hurry>=5 */

  4249.     if(avctx->hurry_up>=5) {

  4250.         av_free(buf2);

  4251.         return -1;//buf_size;

  4252.     }

  4253. 

  4254.     if(s->next_p_frame_damaged){

  4255.         if(s->pict_type==FF_B_TYPE)

  4256.             return buf_size;

  4257.         else

  4258.             s->next_p_frame_damaged=0;

  4259.     }

  4260. 

  4261.     if(MPV_frame_start(s, avctx) < 0) {

  4262.         av_free(buf2);

  4263.         return -1;

  4264.     }

  4265. 

  4266.     s->me.qpel_put= s->dsp.put_qpel_pixels_tab;

  4267.     s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;

  4268. 

  4269.     if ((CONFIG_VC1_VDPAU_DECODER || CONFIG_WMV3_VDPAU_DECODER)

  4270.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4271.         ff_vdpau_vc1_decode_picture(s, buf_vdpau, (buf + buf_size) - buf_vdpau);

  4272.     else {

  4273.     ff_er_frame_start(s);

  4274. 

  4275.     v->bits = buf_size * 8;

  4276.     vc1_decode_blocks(v);

  4277. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4278. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4279. //      return -1;

  4280.     ff_er_frame_end(s);

  4281.     }

  4282. 

  4283.     MPV_frame_end(s);

  4284. 

  4285. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4286. assert(s->current_picture.pict_type == s->pict_type);

  4287.     if (s->pict_type == FF_B_TYPE || s->low_delay) {

  4288.         *pict= *(AVFrame*)s->current_picture_ptr;

  4289.     } else if (s->last_picture_ptr != NULL) {

  4290.         *pict= *(AVFrame*)s->last_picture_ptr;

  4291.     }

  4292. 

  4293.     if(s->last_picture_ptr || s->low_delay){

  4294.         *data_size = sizeof(AVFrame);

  4295.         ff_print_debug_info(s, pict);

  4296.     }

  4297. 

  4298.     /* Return the Picture timestamp as the frame number */

  4299.     /* we subtract 1 because it is added on utils.c     */

  4300.     avctx->frame_number = s->picture_number - 1;

  4301. 

  4302.     av_free(buf2);

  4303.     return buf_size;

  4304. }

  4305. 

  4306. 

  4307. /** Close a VC1/WMV3 decoder

  4308.  * @warning Initial try at using MpegEncContext stuff

  4309.  */

  4310. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  4311. {

  4312.     VC1Context *v = avctx->priv_data;

  4313. 

  4314.     av_freep(&v->hrd_rate);

  4315.     av_freep(&v->hrd_buffer);

  4316.     MPV_common_end(&v->s);

  4317.     av_freep(&v->mv_type_mb_plane);

  4318.     av_freep(&v->direct_mb_plane);

  4319.     av_freep(&v->acpred_plane);

  4320.     av_freep(&v->over_flags_plane);

  4321.     av_freep(&v->mb_type_base);

  4322.     av_freep(&v->cbp_base);

  4323.     ff_intrax8_common_end(&v->x8);

  4324.     return 0;

  4325. }

  4326. 

  4327. 

  4328. AVCodec vc1_decoder = {

  4329.     "vc1",

  4330.     CODEC_TYPE_VIDEO,

  4331.     CODEC_ID_VC1,

  4332.     sizeof(VC1Context),

  4333.     vc1_decode_init,

  4334.     NULL,

  4335.     vc1_decode_end,

  4336.     vc1_decode_frame,

  4337.     CODEC_CAP_DELAY,

  4338.     NULL,

  4339.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  4340. };

  4341. 

  4342. AVCodec wmv3_decoder = {

  4343.     "wmv3",

  4344.     CODEC_TYPE_VIDEO,

  4345.     CODEC_ID_WMV3,

  4346.     sizeof(VC1Context),

  4347.     vc1_decode_init,

  4348.     NULL,

  4349.     vc1_decode_end,

  4350.     vc1_decode_frame,

  4351.     CODEC_CAP_DELAY,

  4352.     NULL,

  4353.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  4354. };

  4355. 

  4356. #if CONFIG_WMV3_VDPAU_DECODER

  4357. AVCodec wmv3_vdpau_decoder = {

  4358.     "wmv3_vdpau",

  4359.     CODEC_TYPE_VIDEO,

  4360.     CODEC_ID_WMV3,

  4361.     sizeof(VC1Context),

  4362.     vc1_decode_init,

  4363.     NULL,

  4364.     vc1_decode_end,

  4365.     vc1_decode_frame,

  4366.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4367.     NULL,

  4368.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  4369. };

  4370. #endif

  4371. 

  4372. #if CONFIG_VC1_VDPAU_DECODER

  4373. AVCodec vc1_vdpau_decoder = {

  4374.     "vc1_vdpau",

  4375.     CODEC_TYPE_VIDEO,

  4376.     CODEC_ID_VC1,

  4377.     sizeof(VC1Context),

  4378.     vc1_decode_init,

  4379.     NULL,

  4380.     vc1_decode_end,

  4381.     vc1_decode_frame,

  4382.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4383.     NULL,

  4384.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  4385. };

  4386. #endif