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

  1178. 

  1179.     if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){

  1180.         v->x8_type = get_bits1(gb);

  1181.     }else v->x8_type = 0;

  1182. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1183. //        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1184. 

  1185.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1186. 

  1187.     switch(v->s.pict_type) {

  1188.     case FF_P_TYPE:

  1189.         if (v->pq < 5) v->tt_index = 0;

  1190.         else if(v->pq < 13) v->tt_index = 1;

  1191.         else v->tt_index = 2;

  1192. 

  1193.         lowquant = (v->pq > 12) ? 0 : 1;

  1194.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1195.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1196.         {

  1197.             int scale, shift, i;

  1198.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1199.             v->lumscale = get_bits(gb, 6);

  1200.             v->lumshift = get_bits(gb, 6);

  1201.             v->use_ic = 1;

  1202.             /* fill lookup tables for intensity compensation */

  1203.             if(!v->lumscale) {

  1204.                 scale = -64;

  1205.                 shift = (255 - v->lumshift * 2) << 6;

  1206.                 if(v->lumshift > 31)

  1207.                     shift += 128 << 6;

  1208.             } else {

  1209.                 scale = v->lumscale + 32;

  1210.                 if(v->lumshift > 31)

  1211.                     shift = (v->lumshift - 64) << 6;

  1212.                 else

  1213.                     shift = v->lumshift << 6;

  1214.             }

  1215.             for(i = 0; i < 256; i++) {

  1216.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1217.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1218.             }

  1219.         }

  1220.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1221.             v->s.quarter_sample = 0;

  1222.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1223.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1224.                 v->s.quarter_sample = 0;

  1225.             else

  1226.                 v->s.quarter_sample = 1;

  1227.         } else

  1228.             v->s.quarter_sample = 1;

  1229.         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));

  1230. 

  1231.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1232.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1233.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1234.         {

  1235.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1236.             if (status < 0) return -1;

  1237.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1238.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1239.         } else {

  1240.             v->mv_type_is_raw = 0;

  1241.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1242.         }

  1243.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1244.         if (status < 0) return -1;

  1245.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1246.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1247. 

  1248.         /* Hopefully this is correct for P frames */

  1249.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1250.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1251. 

  1252.         if (v->dquant)

  1253.         {

  1254.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1255.             vop_dquant_decoding(v);

  1256.         }

  1257. 

  1258.         v->ttfrm = 0; //FIXME Is that so ?

  1259.         if (v->vstransform)

  1260.         {

  1261.             v->ttmbf = get_bits1(gb);

  1262.             if (v->ttmbf)

  1263.             {

  1264.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1265.             }

  1266.         } else {

  1267.             v->ttmbf = 1;

  1268.             v->ttfrm = TT_8X8;

  1269.         }

  1270.         break;

  1271.     case FF_B_TYPE:

  1272.         if (v->pq < 5) v->tt_index = 0;

  1273.         else if(v->pq < 13) v->tt_index = 1;

  1274.         else v->tt_index = 2;

  1275. 

  1276.         lowquant = (v->pq > 12) ? 0 : 1;

  1277.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1278.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1279.         v->s.mspel = v->s.quarter_sample;

  1280. 

  1281.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1282.         if (status < 0) return -1;

  1283.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1284.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1285.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1286.         if (status < 0) return -1;

  1287.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1288.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1289. 

  1290.         v->s.mv_table_index = get_bits(gb, 2);

  1291.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1292. 

  1293.         if (v->dquant)

  1294.         {

  1295.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1296.             vop_dquant_decoding(v);

  1297.         }

  1298. 

  1299.         v->ttfrm = 0;

  1300.         if (v->vstransform)

  1301.         {

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

  1303.             if (v->ttmbf)

  1304.             {

  1305.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1306.             }

  1307.         } else {

  1308.             v->ttmbf = 1;

  1309.             v->ttfrm = TT_8X8;

  1310.         }

  1311.         break;

  1312.     }

  1313. 

  1314.     if(!v->x8_type)

  1315.     {

  1316.         /* AC Syntax */

  1317.         v->c_ac_table_index = decode012(gb);

  1318.         if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1319.         {

  1320.             v->y_ac_table_index = decode012(gb);

  1321.         }

  1322.         /* DC Syntax */

  1323.         v->s.dc_table_index = get_bits1(gb);

  1324.     }

  1325. 

  1326.     if(v->s.pict_type == FF_BI_TYPE) {

  1327.         v->s.pict_type = FF_B_TYPE;

  1328.         v->bi_type = 1;

  1329.     }

  1330.     return 0;

  1331. }

  1332. 

  1333. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1334. {

  1335.     int pqindex, lowquant;

  1336.     int status;

  1337. 

  1338.     v->p_frame_skipped = 0;

  1339. 

  1340.     if(v->interlace){

  1341.         v->fcm = decode012(gb);

  1342.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1343.     }

  1344.     switch(get_unary(gb, 0, 4)) {

  1345.     case 0:

  1346.         v->s.pict_type = FF_P_TYPE;

  1347.         break;

  1348.     case 1:

  1349.         v->s.pict_type = FF_B_TYPE;

  1350.         break;

  1351.     case 2:

  1352.         v->s.pict_type = FF_I_TYPE;

  1353.         break;

  1354.     case 3:

  1355.         v->s.pict_type = FF_BI_TYPE;

  1356.         break;

  1357.     case 4:

  1358.         v->s.pict_type = FF_P_TYPE; // skipped pic

  1359.         v->p_frame_skipped = 1;

  1360.         return 0;

  1361.     }

  1362.     if(v->tfcntrflag)

  1363.         skip_bits(gb, 8);

  1364.     if(v->broadcast) {

  1365.         if(!v->interlace || v->psf) {

  1366.             v->rptfrm = get_bits(gb, 2);

  1367.         } else {

  1368.             v->tff = get_bits1(gb);

  1369.             v->rptfrm = get_bits1(gb);

  1370.         }

  1371.     }

  1372.     if(v->panscanflag) {

  1373.         //...

  1374.     }

  1375.     v->rnd = get_bits1(gb);

  1376.     if(v->interlace)

  1377.         v->uvsamp = get_bits1(gb);

  1378.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1379.     if(v->s.pict_type == FF_B_TYPE) {

  1380.         v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1381.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction];

  1382.         if(v->bfraction == 0) {

  1383.             v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */

  1384.         }

  1385.     }

  1386.     pqindex = get_bits(gb, 5);

  1387.     if(!pqindex) return -1;

  1388.     v->pqindex = pqindex;

  1389.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1390.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1391.     else

  1392.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1393. 

  1394.     v->pquantizer = 1;

  1395.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1396.         v->pquantizer = pqindex < 9;

  1397.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1398.         v->pquantizer = 0;

  1399.     v->pqindex = pqindex;

  1400.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1401.     else v->halfpq = 0;

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

  1403.         v->pquantizer = get_bits1(gb);

  1404.     if(v->postprocflag)

  1405.         v->postproc = get_bits(gb, 2);

  1406. 

  1407.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1408. 

  1409.     switch(v->s.pict_type) {

  1410.     case FF_I_TYPE:

  1411.     case FF_BI_TYPE:

  1412.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1413.         if (status < 0) return -1;

  1414.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1415.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1416.         v->condover = CONDOVER_NONE;

  1417.         if(v->overlap && v->pq <= 8) {

  1418.             v->condover = decode012(gb);

  1419.             if(v->condover == CONDOVER_SELECT) {

  1420.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1421.                 if (status < 0) return -1;

  1422.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1423.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1424.             }

  1425.         }

  1426.         break;

  1427.     case FF_P_TYPE:

  1428.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1429.         else v->mvrange = 0;

  1430.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1431.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1432.         v->range_x = 1 << (v->k_x - 1);

  1433.         v->range_y = 1 << (v->k_y - 1);

  1434. 

  1435.         if (v->pq < 5) v->tt_index = 0;

  1436.         else if(v->pq < 13) v->tt_index = 1;

  1437.         else v->tt_index = 2;

  1438. 

  1439.         lowquant = (v->pq > 12) ? 0 : 1;

  1440.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1441.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1442.         {

  1443.             int scale, shift, i;

  1444.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1445.             v->lumscale = get_bits(gb, 6);

  1446.             v->lumshift = get_bits(gb, 6);

  1447.             /* fill lookup tables for intensity compensation */

  1448.             if(!v->lumscale) {

  1449.                 scale = -64;

  1450.                 shift = (255 - v->lumshift * 2) << 6;

  1451.                 if(v->lumshift > 31)

  1452.                     shift += 128 << 6;

  1453.             } else {

  1454.                 scale = v->lumscale + 32;

  1455.                 if(v->lumshift > 31)

  1456.                     shift = (v->lumshift - 64) << 6;

  1457.                 else

  1458.                     shift = v->lumshift << 6;

  1459.             }

  1460.             for(i = 0; i < 256; i++) {

  1461.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1462.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1463.             }

  1464.             v->use_ic = 1;

  1465.         }

  1466.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1467.             v->s.quarter_sample = 0;

  1468.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1469.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1470.                 v->s.quarter_sample = 0;

  1471.             else

  1472.                 v->s.quarter_sample = 1;

  1473.         } else

  1474.             v->s.quarter_sample = 1;

  1475.         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));

  1476. 

  1477.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1478.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1479.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1480.         {

  1481.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1482.             if (status < 0) return -1;

  1483.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1484.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1485.         } else {

  1486.             v->mv_type_is_raw = 0;

  1487.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1488.         }

  1489.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1490.         if (status < 0) return -1;

  1491.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1492.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1493. 

  1494.         /* Hopefully this is correct for P frames */

  1495.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1496.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1497.         if (v->dquant)

  1498.         {

  1499.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1500.             vop_dquant_decoding(v);

  1501.         }

  1502. 

  1503.         v->ttfrm = 0; //FIXME Is that so ?

  1504.         if (v->vstransform)

  1505.         {

  1506.             v->ttmbf = get_bits1(gb);

  1507.             if (v->ttmbf)

  1508.             {

  1509.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1510.             }

  1511.         } else {

  1512.             v->ttmbf = 1;

  1513.             v->ttfrm = TT_8X8;

  1514.         }

  1515.         break;

  1516.     case FF_B_TYPE:

  1517.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1518.         else v->mvrange = 0;

  1519.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1520.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1521.         v->range_x = 1 << (v->k_x - 1);

  1522.         v->range_y = 1 << (v->k_y - 1);

  1523. 

  1524.         if (v->pq < 5) v->tt_index = 0;

  1525.         else if(v->pq < 13) v->tt_index = 1;

  1526.         else v->tt_index = 2;

  1527. 

  1528.         lowquant = (v->pq > 12) ? 0 : 1;

  1529.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1530.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1531.         v->s.mspel = v->s.quarter_sample;

  1532. 

  1533.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1534.         if (status < 0) return -1;

  1535.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1536.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1537.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1538.         if (status < 0) return -1;

  1539.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1540.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1541. 

  1542.         v->s.mv_table_index = get_bits(gb, 2);

  1543.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1544. 

  1545.         if (v->dquant)

  1546.         {

  1547.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1548.             vop_dquant_decoding(v);

  1549.         }

  1550. 

  1551.         v->ttfrm = 0;

  1552.         if (v->vstransform)

  1553.         {

  1554.             v->ttmbf = get_bits1(gb);

  1555.             if (v->ttmbf)

  1556.             {

  1557.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1558.             }

  1559.         } else {

  1560.             v->ttmbf = 1;

  1561.             v->ttfrm = TT_8X8;

  1562.         }

  1563.         break;

  1564.     }

  1565. 

  1566.     /* AC Syntax */

  1567.     v->c_ac_table_index = decode012(gb);

  1568.     if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1569.     {

  1570.         v->y_ac_table_index = decode012(gb);

  1571.     }

  1572.     /* DC Syntax */

  1573.     v->s.dc_table_index = get_bits1(gb);

  1574.     if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {

  1575.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1576.         vop_dquant_decoding(v);

  1577.     }

  1578. 

  1579.     v->bi_type = 0;

  1580.     if(v->s.pict_type == FF_BI_TYPE) {

  1581.         v->s.pict_type = FF_B_TYPE;

  1582.         v->bi_type = 1;

  1583.     }

  1584.     return 0;

  1585. }

  1586. 

  1587. /***********************************************************************/

  1588. /**

  1589.  * @defgroup block VC-1 Block-level functions

  1590.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1591.  * @{

  1592.  */

  1593. 

  1594. /**

  1595.  * @def GET_MQUANT

  1596.  * @brief Get macroblock-level quantizer scale

  1597.  */

  1598. #define GET_MQUANT()                                           \

  1599.   if (v->dquantfrm)                                            \

  1600.   {                                                            \

  1601.     int edges = 0;                                             \

  1602.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1603.     {                                                          \

  1604.       if (v->dqbilevel)                                        \

  1605.       {                                                        \

  1606.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1607.       }                                                        \

  1608.       else                                                     \

  1609.       {                                                        \

  1610.         mqdiff = get_bits(gb, 3);                              \

  1611.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1612.         else mquant = get_bits(gb, 5);                         \

  1613.       }                                                        \

  1614.     }                                                          \

  1615.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1616.         edges = 1 << v->dqsbedge;                              \

  1617.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1618.         edges = (3 << v->dqsbedge) % 15;                       \

  1619.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1620.         edges = 15;                                            \

  1621.     if((edges&1) && !s->mb_x)                                  \

  1622.         mquant = v->altpq;                                     \

  1623.     if((edges&2) && s->first_slice_line)                       \

  1624.         mquant = v->altpq;                                     \

  1625.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1626.         mquant = v->altpq;                                     \

  1627.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1628.         mquant = v->altpq;                                     \

  1629.   }

  1630. 

  1631. /**

  1632.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1633.  * @brief Get MV differentials

  1634.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1635.  * @param _dmv_x Horizontal differential for decoded MV

  1636.  * @param _dmv_y Vertical differential for decoded MV

  1637.  */

  1638. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1639.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1640.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1641.   if (index > 36)                                                   \

  1642.   {                                                                 \

  1643.     mb_has_coeffs = 1;                                              \

  1644.     index -= 37;                                                    \

  1645.   }                                                                 \

  1646.   else mb_has_coeffs = 0;                                           \

  1647.   s->mb_intra = 0;                                                  \

  1648.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1649.   else if (index == 35)                                             \

  1650.   {                                                                 \

  1651.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1652.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1653.   }                                                                 \

  1654.   else if (index == 36)                                             \

  1655.   {                                                                 \

  1656.     _dmv_x = 0;                                                     \

  1657.     _dmv_y = 0;                                                     \

  1658.     s->mb_intra = 1;                                                \

  1659.   }                                                                 \

  1660.   else                                                              \

  1661.   {                                                                 \

  1662.     index1 = index%6;                                               \

  1663.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1664.     else                                   val = 0;                 \

  1665.     if(size_table[index1] - val > 0)                                \

  1666.         val = get_bits(gb, size_table[index1] - val);               \

  1667.     else                                   val = 0;                 \

  1668.     sign = 0 - (val&1);                                             \

  1669.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1670.                                                                     \

  1671.     index1 = index/6;                                               \

  1672.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1673.     else                                   val = 0;                 \

  1674.     if(size_table[index1] - val > 0)                                \

  1675.         val = get_bits(gb, size_table[index1] - val);               \

  1676.     else                                   val = 0;                 \

  1677.     sign = 0 - (val&1);                                             \

  1678.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1679.   }

  1680. 

  1681. /** Predict and set motion vector

  1682.  */

  1683. 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)

  1684. {

  1685.     int xy, wrap, off = 0;

  1686.     int16_t *A, *B, *C;

  1687.     int px, py;

  1688.     int sum;

  1689. 

  1690.     /* scale MV difference to be quad-pel */

  1691.     dmv_x <<= 1 - s->quarter_sample;

  1692.     dmv_y <<= 1 - s->quarter_sample;

  1693. 

  1694.     wrap = s->b8_stride;

  1695.     xy = s->block_index[n];

  1696. 

  1697.     if(s->mb_intra){

  1698.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1699.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

  1700.         s->current_picture.motion_val[1][xy][0] = 0;

  1701.         s->current_picture.motion_val[1][xy][1] = 0;

  1702.         if(mv1) { /* duplicate motion data for 1-MV block */

  1703.             s->current_picture.motion_val[0][xy + 1][0] = 0;

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

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

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

  1707.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

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

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

  1710.             s->current_picture.motion_val[1][xy + 1][1] = 0;

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

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

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

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

  1715.         }

  1716.         return;

  1717.     }

  1718. 

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

  1720.     A = s->current_picture.motion_val[0][xy - wrap];

  1721.     if(mv1)

  1722.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1723.     else {

  1724.         //in 4-MV mode different blocks have different B predictor position

  1725.         switch(n){

  1726.         case 0:

  1727.             off = (s->mb_x > 0) ? -1 : 1;

  1728.             break;

  1729.         case 1:

  1730.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1731.             break;

  1732.         case 2:

  1733.             off = 1;

  1734.             break;

  1735.         case 3:

  1736.             off = -1;

  1737.         }

  1738.     }

  1739.     B = s->current_picture.motion_val[0][xy - wrap + off];

  1740. 

  1741.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1742.         if(s->mb_width == 1) {

  1743.             px = A[0];

  1744.             py = A[1];

  1745.         } else {

  1746.             px = mid_pred(A[0], B[0], C[0]);

  1747.             py = mid_pred(A[1], B[1], C[1]);

  1748.         }

  1749.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1750.         px = C[0];

  1751.         py = C[1];

  1752.     } else {

  1753.         px = py = 0;

  1754.     }

  1755.     /* Pullback MV as specified in 8.3.5.3.4 */

  1756.     {

  1757.         int qx, qy, X, Y;

  1758.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1759.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1760.         X = (s->mb_width << 6) - 4;

  1761.         Y = (s->mb_height << 6) - 4;

  1762.         if(mv1) {

  1763.             if(qx + px < -60) px = -60 - qx;

  1764.             if(qy + py < -60) py = -60 - qy;

  1765.         } else {

  1766.             if(qx + px < -28) px = -28 - qx;

  1767.             if(qy + py < -28) py = -28 - qy;

  1768.         }

  1769.         if(qx + px > X) px = X - qx;

  1770.         if(qy + py > Y) py = Y - qy;

  1771.     }

  1772.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1773.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1774.         if(is_intra[xy - wrap])

  1775.             sum = FFABS(px) + FFABS(py);

  1776.         else

  1777.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1778.         if(sum > 32) {

  1779.             if(get_bits1(&s->gb)) {

  1780.                 px = A[0];

  1781.                 py = A[1];

  1782.             } else {

  1783.                 px = C[0];

  1784.                 py = C[1];

  1785.             }

  1786.         } else {

  1787.             if(is_intra[xy - 1])

  1788.                 sum = FFABS(px) + FFABS(py);

  1789.             else

  1790.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1791.             if(sum > 32) {

  1792.                 if(get_bits1(&s->gb)) {

  1793.                     px = A[0];

  1794.                     py = A[1];

  1795.                 } else {

  1796.                     px = C[0];

  1797.                     py = C[1];

  1798.                 }

  1799.             }

  1800.         }

  1801.     }

  1802.     /* store MV using signed modulus of MV range defined in 4.11 */

  1803.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1804.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1805.     if(mv1) { /* duplicate motion data for 1-MV block */

  1806.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  1807.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  1808.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1809.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1810.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1811.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1812.     }

  1813. }

  1814. 

  1815. /** Motion compensation for direct or interpolated blocks in B-frames

  1816.  */

  1817. static void vc1_interp_mc(VC1Context *v)

  1818. {

  1819.     MpegEncContext *s = &v->s;

  1820.     DSPContext *dsp = &v->s.dsp;

  1821.     uint8_t *srcY, *srcU, *srcV;

  1822.     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1823. 

  1824.     if(!v->s.next_picture.data[0])return;

  1825. 

  1826.     mx = s->mv[1][0][0];

  1827.     my = s->mv[1][0][1];

  1828.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1829.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1830.     if(v->fastuvmc) {

  1831.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1832.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1833.     }

  1834.     srcY = s->next_picture.data[0];

  1835.     srcU = s->next_picture.data[1];

  1836.     srcV = s->next_picture.data[2];

  1837. 

  1838.     src_x = s->mb_x * 16 + (mx >> 2);

  1839.     src_y = s->mb_y * 16 + (my >> 2);

  1840.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1841.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1842. 

  1843.     if(v->profile != PROFILE_ADVANCED){

  1844.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1845.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1846.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1847.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1848.     }else{

  1849.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1850.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1851.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1852.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1853.     }

  1854. 

  1855.     srcY += src_y * s->linesize + src_x;

  1856.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1857.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1858. 

  1859.     /* for grayscale we should not try to read from unknown area */

  1860.     if(s->flags & CODEC_FLAG_GRAY) {

  1861.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1862.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1863.     }

  1864. 

  1865.     if(v->rangeredfrm

  1866.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  1867.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  1868.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1869. 

  1870.         srcY -= s->mspel * (1 + s->linesize);

  1871.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1872.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1873.         srcY = s->edge_emu_buffer;

  1874.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1875.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1876.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1877.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1878.         srcU = uvbuf;

  1879.         srcV = uvbuf + 16;

  1880.         /* if we deal with range reduction we need to scale source blocks */

  1881.         if(v->rangeredfrm) {

  1882.             int i, j;

  1883.             uint8_t *src, *src2;

  1884. 

  1885.             src = srcY;

  1886.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1887.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1888.                 src += s->linesize;

  1889.             }

  1890.             src = srcU; src2 = srcV;

  1891.             for(j = 0; j < 9; j++) {

  1892.                 for(i = 0; i < 9; i++) {

  1893.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1894.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1895.                 }

  1896.                 src += s->uvlinesize;

  1897.                 src2 += s->uvlinesize;

  1898.             }

  1899.         }

  1900.         srcY += s->mspel * (1 + s->linesize);

  1901.     }

  1902. 

  1903.     mx >>= 1;

  1904.     my >>= 1;

  1905.     dxy = ((my & 1) << 1) | (mx & 1);

  1906. 

  1907.     dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1908. 

  1909.     if(s->flags & CODEC_FLAG_GRAY) return;

  1910.     /* Chroma MC always uses qpel blilinear */

  1911.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  1912.     uvmx = (uvmx&3)<<1;

  1913.     uvmy = (uvmy&3)<<1;

  1914.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1915.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1916. }

  1917. 

  1918. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1919. {

  1920.     int n = bfrac;

  1921. 

  1922. #if B_FRACTION_DEN==256

  1923.     if(inv)

  1924.         n -= 256;

  1925.     if(!qs)

  1926.         return 2 * ((value * n + 255) >> 9);

  1927.     return (value * n + 128) >> 8;

  1928. #else

  1929.     if(inv)

  1930.         n -= B_FRACTION_DEN;

  1931.     if(!qs)

  1932.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1933.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1934. #endif

  1935. }

  1936. 

  1937. /** Reconstruct motion vector for B-frame and do motion compensation

  1938.  */

  1939. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1940. {

  1941.     if(v->use_ic) {

  1942.         v->mv_mode2 = v->mv_mode;

  1943.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1944.     }

  1945.     if(direct) {

  1946.         vc1_mc_1mv(v, 0);

  1947.         vc1_interp_mc(v);

  1948.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1949.         return;

  1950.     }

  1951.     if(mode == BMV_TYPE_INTERPOLATED) {

  1952.         vc1_mc_1mv(v, 0);

  1953.         vc1_interp_mc(v);

  1954.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1955.         return;

  1956.     }

  1957. 

  1958.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1959.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1960.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1961. }

  1962. 

  1963. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1964. {

  1965.     MpegEncContext *s = &v->s;

  1966.     int xy, wrap, off = 0;

  1967.     int16_t *A, *B, *C;

  1968.     int px, py;

  1969.     int sum;

  1970.     int r_x, r_y;

  1971.     const uint8_t *is_intra = v->mb_type[0];

  1972. 

  1973.     r_x = v->range_x;

  1974.     r_y = v->range_y;

  1975.     /* scale MV difference to be quad-pel */

  1976.     dmv_x[0] <<= 1 - s->quarter_sample;

  1977.     dmv_y[0] <<= 1 - s->quarter_sample;

  1978.     dmv_x[1] <<= 1 - s->quarter_sample;

  1979.     dmv_y[1] <<= 1 - s->quarter_sample;

  1980. 

  1981.     wrap = s->b8_stride;

  1982.     xy = s->block_index[0];

  1983. 

  1984.     if(s->mb_intra) {

  1985.         s->current_picture.motion_val[0][xy][0] =

  1986.         s->current_picture.motion_val[0][xy][1] =

  1987.         s->current_picture.motion_val[1][xy][0] =

  1988.         s->current_picture.motion_val[1][xy][1] = 0;

  1989.         return;

  1990.     }

  1991.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  1992.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  1993.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  1994.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  1995. 

  1996.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  1997.     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));

  1998.     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));

  1999.     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));

  2000.     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));

  2001.     if(direct) {

  2002.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2003.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2004.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2005.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2006.         return;

  2007.     }

  2008. 

  2009.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2010.         C = s->current_picture.motion_val[0][xy - 2];

  2011.         A = s->current_picture.motion_val[0][xy - wrap*2];

  2012.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2013.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  2014. 

  2015.         if(!s->mb_x) C[0] = C[1] = 0;

  2016.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2017.             if(s->mb_width == 1) {

  2018.                 px = A[0];

  2019.                 py = A[1];

  2020.             } else {

  2021.                 px = mid_pred(A[0], B[0], C[0]);

  2022.                 py = mid_pred(A[1], B[1], C[1]);

  2023.             }

  2024.         } else if(s->mb_x) { // predictor C is not out of bounds

  2025.             px = C[0];

  2026.             py = C[1];

  2027.         } else {

  2028.             px = py = 0;

  2029.         }

  2030.         /* Pullback MV as specified in 8.3.5.3.4 */

  2031.         {

  2032.             int qx, qy, X, Y;

  2033.             if(v->profile < PROFILE_ADVANCED) {

  2034.                 qx = (s->mb_x << 5);

  2035.                 qy = (s->mb_y << 5);

  2036.                 X = (s->mb_width << 5) - 4;

  2037.                 Y = (s->mb_height << 5) - 4;

  2038.                 if(qx + px < -28) px = -28 - qx;

  2039.                 if(qy + py < -28) py = -28 - qy;

  2040.                 if(qx + px > X) px = X - qx;

  2041.                 if(qy + py > Y) py = Y - qy;

  2042.             } else {

  2043.                 qx = (s->mb_x << 6);

  2044.                 qy = (s->mb_y << 6);

  2045.                 X = (s->mb_width << 6) - 4;

  2046.                 Y = (s->mb_height << 6) - 4;

  2047.                 if(qx + px < -60) px = -60 - qx;

  2048.                 if(qy + py < -60) py = -60 - qy;

  2049.                 if(qx + px > X) px = X - qx;

  2050.                 if(qy + py > Y) py = Y - qy;

  2051.             }

  2052.         }

  2053.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2054.         if(0 && !s->first_slice_line && s->mb_x) {

  2055.             if(is_intra[xy - wrap])

  2056.                 sum = FFABS(px) + FFABS(py);

  2057.             else

  2058.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2059.             if(sum > 32) {

  2060.                 if(get_bits1(&s->gb)) {

  2061.                     px = A[0];

  2062.                     py = A[1];

  2063.                 } else {

  2064.                     px = C[0];

  2065.                     py = C[1];

  2066.                 }

  2067.             } else {

  2068.                 if(is_intra[xy - 2])

  2069.                     sum = FFABS(px) + FFABS(py);

  2070.                 else

  2071.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2072.                 if(sum > 32) {

  2073.                     if(get_bits1(&s->gb)) {

  2074.                         px = A[0];

  2075.                         py = A[1];

  2076.                     } else {

  2077.                         px = C[0];

  2078.                         py = C[1];

  2079.                     }

  2080.                 }

  2081.             }

  2082.         }

  2083.         /* store MV using signed modulus of MV range defined in 4.11 */

  2084.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2085.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2086.     }

  2087.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2088.         C = s->current_picture.motion_val[1][xy - 2];

  2089.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2090.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2091.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2092. 

  2093.         if(!s->mb_x) C[0] = C[1] = 0;

  2094.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2095.             if(s->mb_width == 1) {

  2096.                 px = A[0];

  2097.                 py = A[1];

  2098.             } else {

  2099.                 px = mid_pred(A[0], B[0], C[0]);

  2100.                 py = mid_pred(A[1], B[1], C[1]);

  2101.             }

  2102.         } else if(s->mb_x) { // predictor C is not out of bounds

  2103.             px = C[0];

  2104.             py = C[1];

  2105.         } else {

  2106.             px = py = 0;

  2107.         }

  2108.         /* Pullback MV as specified in 8.3.5.3.4 */

  2109.         {

  2110.             int qx, qy, X, Y;

  2111.             if(v->profile < PROFILE_ADVANCED) {

  2112.                 qx = (s->mb_x << 5);

  2113.                 qy = (s->mb_y << 5);

  2114.                 X = (s->mb_width << 5) - 4;

  2115.                 Y = (s->mb_height << 5) - 4;

  2116.                 if(qx + px < -28) px = -28 - qx;

  2117.                 if(qy + py < -28) py = -28 - qy;

  2118.                 if(qx + px > X) px = X - qx;

  2119.                 if(qy + py > Y) py = Y - qy;

  2120.             } else {

  2121.                 qx = (s->mb_x << 6);

  2122.                 qy = (s->mb_y << 6);

  2123.                 X = (s->mb_width << 6) - 4;

  2124.                 Y = (s->mb_height << 6) - 4;

  2125.                 if(qx + px < -60) px = -60 - qx;

  2126.                 if(qy + py < -60) py = -60 - qy;

  2127.                 if(qx + px > X) px = X - qx;

  2128.                 if(qy + py > Y) py = Y - qy;

  2129.             }

  2130.         }

  2131.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2132.         if(0 && !s->first_slice_line && s->mb_x) {

  2133.             if(is_intra[xy - wrap])

  2134.                 sum = FFABS(px) + FFABS(py);

  2135.             else

  2136.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2137.             if(sum > 32) {

  2138.                 if(get_bits1(&s->gb)) {

  2139.                     px = A[0];

  2140.                     py = A[1];

  2141.                 } else {

  2142.                     px = C[0];

  2143.                     py = C[1];

  2144.                 }

  2145.             } else {

  2146.                 if(is_intra[xy - 2])

  2147.                     sum = FFABS(px) + FFABS(py);

  2148.                 else

  2149.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2150.                 if(sum > 32) {

  2151.                     if(get_bits1(&s->gb)) {

  2152.                         px = A[0];

  2153.                         py = A[1];

  2154.                     } else {

  2155.                         px = C[0];

  2156.                         py = C[1];

  2157.                     }

  2158.                 }

  2159.             }

  2160.         }

  2161.         /* store MV using signed modulus of MV range defined in 4.11 */

  2162. 

  2163.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2164.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2165.     }

  2166.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2167.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2168.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2169.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2170. }

  2171. 

  2172. /** Get predicted DC value for I-frames only

  2173.  * prediction dir: left=0, top=1

  2174.  * @param s MpegEncContext

  2175.  * @param[in] n block index in the current MB

  2176.  * @param dc_val_ptr Pointer to DC predictor

  2177.  * @param dir_ptr Prediction direction for use in AC prediction

  2178.  */

  2179. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2180.                               int16_t **dc_val_ptr, int *dir_ptr)

  2181. {

  2182.     int a, b, c, wrap, pred, scale;

  2183.     int16_t *dc_val;

  2184.     static const uint16_t dcpred[32] = {

  2185.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2186.          114,  102,   93,   85,   79,   73,   68,   64,

  2187.           60,   57,   54,   51,   49,   47,   45,   43,

  2188.           41,   39,   38,   37,   35,   34,   33

  2189.     };

  2190. 

  2191.     /* find prediction - wmv3_dc_scale always used here in fact */

  2192.     if (n < 4)     scale = s->y_dc_scale;

  2193.     else           scale = s->c_dc_scale;

  2194. 

  2195.     wrap = s->block_wrap[n];

  2196.     dc_val= s->dc_val[0] + s->block_index[n];

  2197. 

  2198.     /* B A

  2199.      * C X

  2200.      */

  2201.     c = dc_val[ - 1];

  2202.     b = dc_val[ - 1 - wrap];

  2203.     a = dc_val[ - wrap];

  2204. 

  2205.     if (pq < 9 || !overlap)

  2206.     {

  2207.         /* Set outer values */

  2208.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2209.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2210.     }

  2211.     else

  2212.     {

  2213.         /* Set outer values */

  2214.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2215.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2216.     }

  2217. 

  2218.     if (abs(a - b) <= abs(b - c)) {

  2219.         pred = c;

  2220.         *dir_ptr = 1;//left

  2221.     } else {

  2222.         pred = a;

  2223.         *dir_ptr = 0;//top

  2224.     }

  2225. 

  2226.     /* update predictor */

  2227.     *dc_val_ptr = &dc_val[0];

  2228.     return pred;

  2229. }

  2230. 

  2231. 

  2232. /** Get predicted DC value

  2233.  * prediction dir: left=0, top=1

  2234.  * @param s MpegEncContext

  2235.  * @param[in] n block index in the current MB

  2236.  * @param dc_val_ptr Pointer to DC predictor

  2237.  * @param dir_ptr Prediction direction for use in AC prediction

  2238.  */

  2239. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2240.                               int a_avail, int c_avail,

  2241.                               int16_t **dc_val_ptr, int *dir_ptr)

  2242. {

  2243.     int a, b, c, wrap, pred, scale;

  2244.     int16_t *dc_val;

  2245.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2246.     int q1, q2 = 0;

  2247. 

  2248.     /* find prediction - wmv3_dc_scale always used here in fact */

  2249.     if (n < 4)     scale = s->y_dc_scale;

  2250.     else           scale = s->c_dc_scale;

  2251. 

  2252.     wrap = s->block_wrap[n];

  2253.     dc_val= s->dc_val[0] + s->block_index[n];

  2254. 

  2255.     /* B A

  2256.      * C X

  2257.      */

  2258.     c = dc_val[ - 1];

  2259.     b = dc_val[ - 1 - wrap];

  2260.     a = dc_val[ - wrap];

  2261.     /* scale predictors if needed */

  2262.     q1 = s->current_picture.qscale_table[mb_pos];

  2263.     if(c_avail && (n!= 1 && n!=3)) {

  2264.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2265.         if(q2 && q2 != q1)

  2266.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2267.     }

  2268.     if(a_avail && (n!= 2 && n!=3)) {

  2269.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2270.         if(q2 && q2 != q1)

  2271.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2272.     }

  2273.     if(a_avail && c_avail && (n!=3)) {

  2274.         int off = mb_pos;

  2275.         if(n != 1) off--;

  2276.         if(n != 2) off -= s->mb_stride;

  2277.         q2 = s->current_picture.qscale_table[off];

  2278.         if(q2 && q2 != q1)

  2279.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2280.     }

  2281. 

  2282.     if(a_avail && c_avail) {

  2283.         if(abs(a - b) <= abs(b - c)) {

  2284.             pred = c;

  2285.             *dir_ptr = 1;//left

  2286.         } else {

  2287.             pred = a;

  2288.             *dir_ptr = 0;//top

  2289.         }

  2290.     } else if(a_avail) {

  2291.         pred = a;

  2292.         *dir_ptr = 0;//top

  2293.     } else if(c_avail) {

  2294.         pred = c;

  2295.         *dir_ptr = 1;//left

  2296.     } else {

  2297.         pred = 0;

  2298.         *dir_ptr = 1;//left

  2299.     }

  2300. 

  2301.     /* update predictor */

  2302.     *dc_val_ptr = &dc_val[0];

  2303.     return pred;

  2304. }

  2305. 

  2306. 

  2307. /**

  2308.  * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2309.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2310.  * @{

  2311.  */

  2312. 

  2313. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2314. {

  2315.     int xy, wrap, pred, a, b, c;

  2316. 

  2317.     xy = s->block_index[n];

  2318.     wrap = s->b8_stride;

  2319. 

  2320.     /* B C

  2321.      * A X

  2322.      */

  2323.     a = s->coded_block[xy - 1       ];

  2324.     b = s->coded_block[xy - 1 - wrap];

  2325.     c = s->coded_block[xy     - wrap];

  2326. 

  2327.     if (b == c) {

  2328.         pred = a;

  2329.     } else {

  2330.         pred = c;

  2331.     }

  2332. 

  2333.     /* store value */

  2334.     *coded_block_ptr = &s->coded_block[xy];

  2335. 

  2336.     return pred;

  2337. }

  2338. 

  2339. /**

  2340.  * Decode one AC coefficient

  2341.  * @param v The VC1 context

  2342.  * @param last Last coefficient

  2343.  * @param skip How much zero coefficients to skip

  2344.  * @param value Decoded AC coefficient value

  2345.  * @see 8.1.3.4

  2346.  */

  2347. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2348. {

  2349.     GetBitContext *gb = &v->s.gb;

  2350.     int index, escape, run = 0, level = 0, lst = 0;

  2351. 

  2352.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2353.     if (index != vc1_ac_sizes[codingset] - 1) {

  2354.         run = vc1_index_decode_table[codingset][index][0];

  2355.         level = vc1_index_decode_table[codingset][index][1];

  2356.         lst = index >= vc1_last_decode_table[codingset];

  2357.         if(get_bits1(gb))

  2358.             level = -level;

  2359.     } else {

  2360.         escape = decode210(gb);

  2361.         if (escape != 2) {

  2362.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2363.             run = vc1_index_decode_table[codingset][index][0];

  2364.             level = vc1_index_decode_table[codingset][index][1];

  2365.             lst = index >= vc1_last_decode_table[codingset];

  2366.             if(escape == 0) {

  2367.                 if(lst)

  2368.                     level += vc1_last_delta_level_table[codingset][run];

  2369.                 else

  2370.                     level += vc1_delta_level_table[codingset][run];

  2371.             } else {

  2372.                 if(lst)

  2373.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2374.                 else

  2375.                     run += vc1_delta_run_table[codingset][level] + 1;

  2376.             }

  2377.             if(get_bits1(gb))

  2378.                 level = -level;

  2379.         } else {

  2380.             int sign;

  2381.             lst = get_bits1(gb);

  2382.             if(v->s.esc3_level_length == 0) {

  2383.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2384.                     v->s.esc3_level_length = get_bits(gb, 3);

  2385.                     if(!v->s.esc3_level_length)

  2386.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2387.                 } else { //table 60

  2388.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2389.                 }

  2390.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2391.             }

  2392.             run = get_bits(gb, v->s.esc3_run_length);

  2393.             sign = get_bits1(gb);

  2394.             level = get_bits(gb, v->s.esc3_level_length);

  2395.             if(sign)

  2396.                 level = -level;

  2397.         }

  2398.     }

  2399. 

  2400.     *last = lst;

  2401.     *skip = run;

  2402.     *value = level;

  2403. }

  2404. 

  2405. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2406.  * @param v VC1Context

  2407.  * @param block block to decode

  2408.  * @param coded are AC coeffs present or not

  2409.  * @param codingset set of VLC to decode data

  2410.  */

  2411. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2412. {

  2413.     GetBitContext *gb = &v->s.gb;

  2414.     MpegEncContext *s = &v->s;

  2415.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2416.     int run_diff, i;

  2417.     int16_t *dc_val;

  2418.     int16_t *ac_val, *ac_val2;

  2419.     int dcdiff;

  2420. 

  2421.     /* Get DC differential */

  2422.     if (n < 4) {

  2423.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2424.     } else {

  2425.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2426.     }

  2427.     if (dcdiff < 0){

  2428.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2429.         return -1;

  2430.     }

  2431.     if (dcdiff)

  2432.     {

  2433.         if (dcdiff == 119 /* ESC index value */)

  2434.         {

  2435.             /* TODO: Optimize */

  2436.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2437.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2438.             else dcdiff = get_bits(gb, 8);

  2439.         }

  2440.         else

  2441.         {

  2442.             if (v->pq == 1)

  2443.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2444.             else if (v->pq == 2)

  2445.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2446.         }

  2447.         if (get_bits1(gb))

  2448.             dcdiff = -dcdiff;

  2449.     }

  2450. 

  2451.     /* Prediction */

  2452.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2453.     *dc_val = dcdiff;

  2454. 

  2455.     /* Store the quantized DC coeff, used for prediction */

  2456.     if (n < 4) {

  2457.         block[0] = dcdiff * s->y_dc_scale;

  2458.     } else {

  2459.         block[0] = dcdiff * s->c_dc_scale;

  2460.     }

  2461.     /* Skip ? */

  2462.     run_diff = 0;

  2463.     i = 0;

  2464.     if (!coded) {

  2465.         goto not_coded;

  2466.     }

  2467. 

  2468.     //AC Decoding

  2469.     i = 1;

  2470. 

  2471.     {

  2472.         int last = 0, skip, value;

  2473.         const int8_t *zz_table;

  2474.         int scale;

  2475.         int k;

  2476. 

  2477.         scale = v->pq * 2 + v->halfpq;

  2478. 

  2479.         if(v->s.ac_pred) {

  2480.             if(!dc_pred_dir)

  2481.                 zz_table = wmv1_scantable[2];

  2482.             else

  2483.                 zz_table = wmv1_scantable[3];

  2484.         } else

  2485.             zz_table = wmv1_scantable[1];

  2486. 

  2487.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2488.         ac_val2 = ac_val;

  2489.         if(dc_pred_dir) //left

  2490.             ac_val -= 16;

  2491.         else //top

  2492.             ac_val -= 16 * s->block_wrap[n];

  2493. 

  2494.         while (!last) {

  2495.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2496.             i += skip;

  2497.             if(i > 63)

  2498.                 break;

  2499.             block[zz_table[i++]] = value;

  2500.         }

  2501. 

  2502.         /* apply AC prediction if needed */

  2503.         if(s->ac_pred) {

  2504.             if(dc_pred_dir) { //left

  2505.                 for(k = 1; k < 8; k++)

  2506.                     block[k << 3] += ac_val[k];

  2507.             } else { //top

  2508.                 for(k = 1; k < 8; k++)

  2509.                     block[k] += ac_val[k + 8];

  2510.             }

  2511.         }

  2512.         /* save AC coeffs for further prediction */

  2513.         for(k = 1; k < 8; k++) {

  2514.             ac_val2[k] = block[k << 3];

  2515.             ac_val2[k + 8] = block[k];

  2516.         }

  2517. 

  2518.         /* scale AC coeffs */

  2519.         for(k = 1; k < 64; k++)

  2520.             if(block[k]) {

  2521.                 block[k] *= scale;

  2522.                 if(!v->pquantizer)

  2523.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2524.             }

  2525. 

  2526.         if(s->ac_pred) i = 63;

  2527.     }

  2528. 

  2529. not_coded:

  2530.     if(!coded) {

  2531.         int k, scale;

  2532.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2533.         ac_val2 = ac_val;

  2534. 

  2535.         scale = v->pq * 2 + v->halfpq;

  2536.         memset(ac_val2, 0, 16 * 2);

  2537.         if(dc_pred_dir) {//left

  2538.             ac_val -= 16;

  2539.             if(s->ac_pred)

  2540.                 memcpy(ac_val2, ac_val, 8 * 2);

  2541.         } else {//top

  2542.             ac_val -= 16 * s->block_wrap[n];

  2543.             if(s->ac_pred)

  2544.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2545.         }

  2546. 

  2547.         /* apply AC prediction if needed */

  2548.         if(s->ac_pred) {

  2549.             if(dc_pred_dir) { //left

  2550.                 for(k = 1; k < 8; k++) {

  2551.                     block[k << 3] = ac_val[k] * scale;

  2552.                     if(!v->pquantizer && block[k << 3])

  2553.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2554.                 }

  2555.             } else { //top

  2556.                 for(k = 1; k < 8; k++) {

  2557.                     block[k] = ac_val[k + 8] * scale;

  2558.                     if(!v->pquantizer && block[k])

  2559.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2560.                 }

  2561.             }

  2562.             i = 63;

  2563.         }

  2564.     }

  2565.     s->block_last_index[n] = i;

  2566. 

  2567.     return 0;

  2568. }

  2569. 

  2570. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2571.  * @param v VC1Context

  2572.  * @param block block to decode

  2573.  * @param coded are AC coeffs present or not

  2574.  * @param codingset set of VLC to decode data

  2575.  */

  2576. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2577. {

  2578.     GetBitContext *gb = &v->s.gb;

  2579.     MpegEncContext *s = &v->s;

  2580.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2581.     int run_diff, i;

  2582.     int16_t *dc_val;

  2583.     int16_t *ac_val, *ac_val2;

  2584.     int dcdiff;

  2585.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2586.     int use_pred = s->ac_pred;

  2587.     int scale;

  2588.     int q1, q2 = 0;

  2589.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2590. 

  2591.     /* Get DC differential */

  2592.     if (n < 4) {

  2593.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2594.     } else {

  2595.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2596.     }

  2597.     if (dcdiff < 0){

  2598.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2599.         return -1;

  2600.     }

  2601.     if (dcdiff)

  2602.     {

  2603.         if (dcdiff == 119 /* ESC index value */)

  2604.         {

  2605.             /* TODO: Optimize */

  2606.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2607.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2608.             else dcdiff = get_bits(gb, 8);

  2609.         }

  2610.         else

  2611.         {

  2612.             if (mquant == 1)

  2613.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2614.             else if (mquant == 2)

  2615.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2616.         }

  2617.         if (get_bits1(gb))

  2618.             dcdiff = -dcdiff;

  2619.     }

  2620. 

  2621.     /* Prediction */

  2622.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2623.     *dc_val = dcdiff;

  2624. 

  2625.     /* Store the quantized DC coeff, used for prediction */

  2626.     if (n < 4) {

  2627.         block[0] = dcdiff * s->y_dc_scale;

  2628.     } else {

  2629.         block[0] = dcdiff * s->c_dc_scale;

  2630.     }

  2631.     /* Skip ? */

  2632.     run_diff = 0;

  2633.     i = 0;

  2634. 

  2635.     //AC Decoding

  2636.     i = 1;

  2637. 

  2638.     /* check if AC is needed at all */

  2639.     if(!a_avail && !c_avail) use_pred = 0;

  2640.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2641.     ac_val2 = ac_val;

  2642. 

  2643.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2644. 

  2645.     if(dc_pred_dir) //left

  2646.         ac_val -= 16;

  2647.     else //top

  2648.         ac_val -= 16 * s->block_wrap[n];

  2649. 

  2650.     q1 = s->current_picture.qscale_table[mb_pos];

  2651.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2652.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2653.     if(dc_pred_dir && n==1) q2 = q1;

  2654.     if(!dc_pred_dir && n==2) q2 = q1;

  2655.     if(n==3) q2 = q1;

  2656. 

  2657.     if(coded) {

  2658.         int last = 0, skip, value;

  2659.         const int8_t *zz_table;

  2660.         int k;

  2661. 

  2662.         if(v->s.ac_pred) {

  2663.             if(!dc_pred_dir)

  2664.                 zz_table = wmv1_scantable[2];

  2665.             else

  2666.                 zz_table = wmv1_scantable[3];

  2667.         } else

  2668.             zz_table = wmv1_scantable[1];

  2669. 

  2670.         while (!last) {

  2671.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2672.             i += skip;

  2673.             if(i > 63)

  2674.                 break;

  2675.             block[zz_table[i++]] = value;

  2676.         }

  2677. 

  2678.         /* apply AC prediction if needed */

  2679.         if(use_pred) {

  2680.             /* scale predictors if needed*/

  2681.             if(q2 && q1!=q2) {

  2682.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2683.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2684. 

  2685.                 if(dc_pred_dir) { //left

  2686.                     for(k = 1; k < 8; k++)

  2687.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2688.                 } else { //top

  2689.                     for(k = 1; k < 8; k++)

  2690.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2691.                 }

  2692.             } else {

  2693.                 if(dc_pred_dir) { //left

  2694.                     for(k = 1; k < 8; k++)

  2695.                         block[k << 3] += ac_val[k];

  2696.                 } else { //top

  2697.                     for(k = 1; k < 8; k++)

  2698.                         block[k] += ac_val[k + 8];

  2699.                 }

  2700.             }

  2701.         }

  2702.         /* save AC coeffs for further prediction */

  2703.         for(k = 1; k < 8; k++) {

  2704.             ac_val2[k] = block[k << 3];

  2705.             ac_val2[k + 8] = block[k];

  2706.         }

  2707. 

  2708.         /* scale AC coeffs */

  2709.         for(k = 1; k < 64; k++)

  2710.             if(block[k]) {

  2711.                 block[k] *= scale;

  2712.                 if(!v->pquantizer)

  2713.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2714.             }

  2715. 

  2716.         if(use_pred) i = 63;

  2717.     } else { // no AC coeffs

  2718.         int k;

  2719. 

  2720.         memset(ac_val2, 0, 16 * 2);

  2721.         if(dc_pred_dir) {//left

  2722.             if(use_pred) {

  2723.                 memcpy(ac_val2, ac_val, 8 * 2);

  2724.                 if(q2 && q1!=q2) {

  2725.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2726.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2727.                     for(k = 1; k < 8; k++)

  2728.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2729.                 }

  2730.             }

  2731.         } else {//top

  2732.             if(use_pred) {

  2733.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2734.                 if(q2 && q1!=q2) {

  2735.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2736.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2737.                     for(k = 1; k < 8; k++)

  2738.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2739.                 }

  2740.             }

  2741.         }

  2742. 

  2743.         /* apply AC prediction if needed */

  2744.         if(use_pred) {

  2745.             if(dc_pred_dir) { //left

  2746.                 for(k = 1; k < 8; k++) {

  2747.                     block[k << 3] = ac_val2[k] * scale;

  2748.                     if(!v->pquantizer && block[k << 3])

  2749.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2750.                 }

  2751.             } else { //top

  2752.                 for(k = 1; k < 8; k++) {

  2753.                     block[k] = ac_val2[k + 8] * scale;

  2754.                     if(!v->pquantizer && block[k])

  2755.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2756.                 }

  2757.             }

  2758.             i = 63;

  2759.         }

  2760.     }

  2761.     s->block_last_index[n] = i;

  2762. 

  2763.     return 0;

  2764. }

  2765. 

  2766. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2767.  * @param v VC1Context

  2768.  * @param block block to decode

  2769.  * @param coded are AC coeffs present or not

  2770.  * @param mquant block quantizer

  2771.  * @param codingset set of VLC to decode data

  2772.  */

  2773. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2774. {

  2775.     GetBitContext *gb = &v->s.gb;

  2776.     MpegEncContext *s = &v->s;

  2777.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2778.     int run_diff, i;

  2779.     int16_t *dc_val;

  2780.     int16_t *ac_val, *ac_val2;

  2781.     int dcdiff;

  2782.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2783.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2784.     int use_pred = s->ac_pred;

  2785.     int scale;

  2786.     int q1, q2 = 0;

  2787. 

  2788.     /* XXX: Guard against dumb values of mquant */

  2789.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2790. 

  2791.     /* Set DC scale - y and c use the same */

  2792.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2793.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2794. 

  2795.     /* Get DC differential */

  2796.     if (n < 4) {

  2797.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2798.     } else {

  2799.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2800.     }

  2801.     if (dcdiff < 0){

  2802.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2803.         return -1;

  2804.     }

  2805.     if (dcdiff)

  2806.     {

  2807.         if (dcdiff == 119 /* ESC index value */)

  2808.         {

  2809.             /* TODO: Optimize */

  2810.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2811.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2812.             else dcdiff = get_bits(gb, 8);

  2813.         }

  2814.         else

  2815.         {

  2816.             if (mquant == 1)

  2817.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2818.             else if (mquant == 2)

  2819.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2820.         }

  2821.         if (get_bits1(gb))

  2822.             dcdiff = -dcdiff;

  2823.     }

  2824. 

  2825.     /* Prediction */

  2826.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2827.     *dc_val = dcdiff;

  2828. 

  2829.     /* Store the quantized DC coeff, used for prediction */

  2830. 

  2831.     if (n < 4) {

  2832.         block[0] = dcdiff * s->y_dc_scale;

  2833.     } else {

  2834.         block[0] = dcdiff * s->c_dc_scale;

  2835.     }

  2836.     /* Skip ? */

  2837.     run_diff = 0;

  2838.     i = 0;

  2839. 

  2840.     //AC Decoding

  2841.     i = 1;

  2842. 

  2843.     /* check if AC is needed at all and adjust direction if needed */

  2844.     if(!a_avail) dc_pred_dir = 1;

  2845.     if(!c_avail) dc_pred_dir = 0;

  2846.     if(!a_avail && !c_avail) use_pred = 0;

  2847.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2848.     ac_val2 = ac_val;

  2849. 

  2850.     scale = mquant * 2 + v->halfpq;

  2851. 

  2852.     if(dc_pred_dir) //left

  2853.         ac_val -= 16;

  2854.     else //top

  2855.         ac_val -= 16 * s->block_wrap[n];

  2856. 

  2857.     q1 = s->current_picture.qscale_table[mb_pos];

  2858.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2859.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2860.     if(dc_pred_dir && n==1) q2 = q1;

  2861.     if(!dc_pred_dir && n==2) q2 = q1;

  2862.     if(n==3) q2 = q1;

  2863. 

  2864.     if(coded) {

  2865.         int last = 0, skip, value;

  2866.         const int8_t *zz_table;

  2867.         int k;

  2868. 

  2869.         zz_table = wmv1_scantable[0];

  2870. 

  2871.         while (!last) {

  2872.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2873.             i += skip;

  2874.             if(i > 63)

  2875.                 break;

  2876.             block[zz_table[i++]] = value;

  2877.         }

  2878. 

  2879.         /* apply AC prediction if needed */

  2880.         if(use_pred) {

  2881.             /* scale predictors if needed*/

  2882.             if(q2 && q1!=q2) {

  2883.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2884.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2885. 

  2886.                 if(dc_pred_dir) { //left

  2887.                     for(k = 1; k < 8; k++)

  2888.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2889.                 } else { //top

  2890.                     for(k = 1; k < 8; k++)

  2891.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2892.                 }

  2893.             } else {

  2894.                 if(dc_pred_dir) { //left

  2895.                     for(k = 1; k < 8; k++)

  2896.                         block[k << 3] += ac_val[k];

  2897.                 } else { //top

  2898.                     for(k = 1; k < 8; k++)

  2899.                         block[k] += ac_val[k + 8];

  2900.                 }

  2901.             }

  2902.         }

  2903.         /* save AC coeffs for further prediction */

  2904.         for(k = 1; k < 8; k++) {

  2905.             ac_val2[k] = block[k << 3];

  2906.             ac_val2[k + 8] = block[k];

  2907.         }

  2908. 

  2909.         /* scale AC coeffs */

  2910.         for(k = 1; k < 64; k++)

  2911.             if(block[k]) {

  2912.                 block[k] *= scale;

  2913.                 if(!v->pquantizer)

  2914.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2915.             }

  2916. 

  2917.         if(use_pred) i = 63;

  2918.     } else { // no AC coeffs

  2919.         int k;

  2920. 

  2921.         memset(ac_val2, 0, 16 * 2);

  2922.         if(dc_pred_dir) {//left

  2923.             if(use_pred) {

  2924.                 memcpy(ac_val2, ac_val, 8 * 2);

  2925.                 if(q2 && q1!=q2) {

  2926.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2927.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2928.                     for(k = 1; k < 8; k++)

  2929.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2930.                 }

  2931.             }

  2932.         } else {//top

  2933.             if(use_pred) {

  2934.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2935.                 if(q2 && q1!=q2) {

  2936.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2937.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2938.                     for(k = 1; k < 8; k++)

  2939.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2940.                 }

  2941.             }

  2942.         }

  2943. 

  2944.         /* apply AC prediction if needed */

  2945.         if(use_pred) {

  2946.             if(dc_pred_dir) { //left

  2947.                 for(k = 1; k < 8; k++) {

  2948.                     block[k << 3] = ac_val2[k] * scale;

  2949.                     if(!v->pquantizer && block[k << 3])

  2950.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2951.                 }

  2952.             } else { //top

  2953.                 for(k = 1; k < 8; k++) {

  2954.                     block[k] = ac_val2[k + 8] * scale;

  2955.                     if(!v->pquantizer && block[k])

  2956.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2957.                 }

  2958.             }

  2959.             i = 63;

  2960.         }

  2961.     }

  2962.     s->block_last_index[n] = i;

  2963. 

  2964.     return 0;

  2965. }

  2966. 

  2967. /** Decode P block

  2968.  */

  2969. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,

  2970.                               uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left)

  2971. {

  2972.     MpegEncContext *s = &v->s;

  2973.     GetBitContext *gb = &s->gb;

  2974.     int i, j;

  2975.     int subblkpat = 0;

  2976.     int scale, off, idx, last, skip, value;

  2977.     int ttblk = ttmb & 7;

  2978.     int pat = 0;

  2979. 

  2980.     if(ttmb == -1) {

  2981.         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)];

  2982.     }

  2983.     if(ttblk == TT_4X4) {

  2984.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  2985.     }

  2986.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  2987.         subblkpat = decode012(gb);

  2988.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  2989.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  2990.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  2991.     }

  2992.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  2993. 

  2994.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  2995.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  2996.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  2997.         ttblk = TT_8X4;

  2998.     }

  2999.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  3000.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  3001.         ttblk = TT_4X8;

  3002.     }

  3003.     switch(ttblk) {

  3004.     case TT_8X8:

  3005.         pat = 0xF;

  3006.         i = 0;

  3007.         last = 0;

  3008.         while (!last) {

  3009.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3010.             i += skip;

  3011.             if(i > 63)

  3012.                 break;

  3013.             idx = wmv1_scantable[0][i++];

  3014.             block[idx] = value * scale;

  3015.             if(!v->pquantizer)

  3016.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3017.         }

  3018.         if(!skip_block){

  3019.             s->dsp.vc1_inv_trans_8x8(block);

  3020.             s->dsp.add_pixels_clamped(block, dst, linesize);

  3021.             if(apply_filter && cbp_top  & 0xC)

  3022.                 vc1_loop_filter(dst, 1, linesize, 8, mquant);

  3023.             if(apply_filter && cbp_left & 0xA)

  3024.                 vc1_loop_filter(dst, linesize, 1, 8, mquant);

  3025.         }

  3026.         break;

  3027.     case TT_4X4:

  3028.         pat = ~subblkpat & 0xF;

  3029.         for(j = 0; j < 4; j++) {

  3030.             last = subblkpat & (1 << (3 - j));

  3031.             i = 0;

  3032.             off = (j & 1) * 4 + (j & 2) * 16;

  3033.             while (!last) {

  3034.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3035.                 i += skip;

  3036.                 if(i > 15)

  3037.                     break;

  3038.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3039.                 block[idx + off] = value * scale;

  3040.                 if(!v->pquantizer)

  3041.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3042.             }

  3043.             if(!(subblkpat & (1 << (3 - j))) && !skip_block){

  3044.                 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);

  3045.                 if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2)))))

  3046.                     vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, 1, linesize, 4, mquant);

  3047.                 if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1)))))

  3048.                     vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, linesize, 1, 4, mquant);

  3049.             }

  3050.         }

  3051.         break;

  3052.     case TT_8X4:

  3053.         pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF;

  3054.         for(j = 0; j < 2; j++) {

  3055.             last = subblkpat & (1 << (1 - j));

  3056.             i = 0;

  3057.             off = j * 32;

  3058.             while (!last) {

  3059.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3060.                 i += skip;

  3061.                 if(i > 31)

  3062.                     break;

  3063.                 idx = v->zz_8x4[i++]+off;

  3064.                 block[idx] = value * scale;

  3065.                 if(!v->pquantizer)

  3066.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3067.             }

  3068.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3069.                 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);

  3070.                 if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC))

  3071.                     vc1_loop_filter(dst + j*4*linesize, 1, linesize, 8, mquant);

  3072.                 if(apply_filter && cbp_left & (2 << j))

  3073.                     vc1_loop_filter(dst + j*4*linesize, linesize, 1, 4, mquant);

  3074.             }

  3075.         }

  3076.         break;

  3077.     case TT_4X8:

  3078.         pat = ~(subblkpat*5) & 0xF;

  3079.         for(j = 0; j < 2; j++) {

  3080.             last = subblkpat & (1 << (1 - j));

  3081.             i = 0;

  3082.             off = j * 4;

  3083.             while (!last) {

  3084.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3085.                 i += skip;

  3086.                 if(i > 31)

  3087.                     break;

  3088.                 idx = v->zz_4x8[i++]+off;

  3089.                 block[idx] = value * scale;

  3090.                 if(!v->pquantizer)

  3091.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3092.             }

  3093.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3094.                 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3095.                 if(apply_filter && cbp_top & (2 << j))

  3096.                     vc1_loop_filter(dst + j*4, 1, linesize, 4, mquant);

  3097.                 if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA))

  3098.                     vc1_loop_filter(dst + j*4, linesize, 1, 8, mquant);

  3099.             }

  3100.         }

  3101.         break;

  3102.     }

  3103.     return pat;

  3104. }

  3105. 

  3106. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3107. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3108. 

  3109. /** Decode one P-frame MB (in Simple/Main profile)

  3110.  */

  3111. static int vc1_decode_p_mb(VC1Context *v)

  3112. {

  3113.     MpegEncContext *s = &v->s;

  3114.     GetBitContext *gb = &s->gb;

  3115.     int i, j;

  3116.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3117.     int cbp; /* cbp decoding stuff */

  3118.     int mqdiff, mquant; /* MB quantization */

  3119.     int ttmb = v->ttfrm; /* MB Transform type */

  3120. 

  3121.     int mb_has_coeffs = 1; /* last_flag */

  3122.     int dmv_x, dmv_y; /* Differential MV components */

  3123.     int index, index1; /* LUT indexes */

  3124.     int val, sign; /* temp values */

  3125.     int first_block = 1;

  3126.     int dst_idx, off;

  3127.     int skipped, fourmv;

  3128.     int block_cbp = 0, pat;

  3129.     int apply_loop_filter;

  3130. 

  3131.     mquant = v->pq; /* Loosy initialization */

  3132. 

  3133.     if (v->mv_type_is_raw)

  3134.         fourmv = get_bits1(gb);

  3135.     else

  3136.         fourmv = v->mv_type_mb_plane[mb_pos];

  3137.     if (v->skip_is_raw)

  3138.         skipped = get_bits1(gb);

  3139.     else

  3140.         skipped = v->s.mbskip_table[mb_pos];

  3141. 

  3142.     s->dsp.clear_blocks(s->block[0]);

  3143. 

  3144.     apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  3145.     if (!fourmv) /* 1MV mode */

  3146.     {

  3147.         if (!skipped)

  3148.         {

  3149.             GET_MVDATA(dmv_x, dmv_y);

  3150. 

  3151.             if (s->mb_intra) {

  3152.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3153.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3154.             }

  3155.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3156.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3157. 

  3158.             /* FIXME Set DC val for inter block ? */

  3159.             if (s->mb_intra && !mb_has_coeffs)

  3160.             {

  3161.                 GET_MQUANT();

  3162.                 s->ac_pred = get_bits1(gb);

  3163.                 cbp = 0;

  3164.             }

  3165.             else if (mb_has_coeffs)

  3166.             {

  3167.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3168.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3169.                 GET_MQUANT();

  3170.             }

  3171.             else

  3172.             {

  3173.                 mquant = v->pq;

  3174.                 cbp = 0;

  3175.             }

  3176.             s->current_picture.qscale_table[mb_pos] = mquant;

  3177. 

  3178.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3179.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3180.                                 VC1_TTMB_VLC_BITS, 2);

  3181.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3182.             dst_idx = 0;

  3183.             for (i=0; i<6; i++)

  3184.             {

  3185.                 s->dc_val[0][s->block_index[i]] = 0;

  3186.                 dst_idx += i >> 2;

  3187.                 val = ((cbp >> (5 - i)) & 1);

  3188.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3189.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3190.                 if(s->mb_intra) {

  3191.                     /* check if prediction blocks A and C are available */

  3192.                     v->a_avail = v->c_avail = 0;

  3193.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3194.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3195.                     if(i == 1 || i == 3 || s->mb_x)

  3196.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3197. 

  3198.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3199.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3200.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3201.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3202.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3203.                     if(v->pq >= 9 && v->overlap) {

  3204.                         if(v->c_avail)

  3205.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3206.                         if(v->a_avail)

  3207.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3208.                     }

  3209.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3210.                         int left_cbp, top_cbp;

  3211.                         if(i & 4){

  3212.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3213.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3214.                         }else{

  3215.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3216.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3217.                         }

  3218.                         if(left_cbp & 0xC)

  3219.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3220.                         if(top_cbp  & 0xA)

  3221.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3222.                     }

  3223.                     block_cbp |= 0xF << (i << 2);

  3224.                 } else if(val) {

  3225.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3226.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3227.                         filter = 1;

  3228.                         if(i & 4){

  3229.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3230.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3231.                         }else{

  3232.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3233.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3234.                         }

  3235.                         if(left_cbp & 0xC)

  3236.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3237.                         if(top_cbp  & 0xA)

  3238.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3239.                     }

  3240.                     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);

  3241.                     block_cbp |= pat << (i << 2);

  3242.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3243.                     first_block = 0;

  3244.                 }

  3245.             }

  3246.         }

  3247.         else //Skipped

  3248.         {

  3249.             s->mb_intra = 0;

  3250.             for(i = 0; i < 6; i++) {

  3251.                 v->mb_type[0][s->block_index[i]] = 0;

  3252.                 s->dc_val[0][s->block_index[i]] = 0;

  3253.             }

  3254.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3255.             s->current_picture.qscale_table[mb_pos] = 0;

  3256.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3257.             vc1_mc_1mv(v, 0);

  3258.             return 0;

  3259.         }

  3260.     } //1MV mode

  3261.     else //4MV mode

  3262.     {

  3263.         if (!skipped /* unskipped MB */)

  3264.         {

  3265.             int intra_count = 0, coded_inter = 0;

  3266.             int is_intra[6], is_coded[6];

  3267.             /* Get CBPCY */

  3268.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3269.             for (i=0; i<6; i++)

  3270.             {

  3271.                 val = ((cbp >> (5 - i)) & 1);

  3272.                 s->dc_val[0][s->block_index[i]] = 0;

  3273.                 s->mb_intra = 0;

  3274.                 if(i < 4) {

  3275.                     dmv_x = dmv_y = 0;

  3276.                     s->mb_intra = 0;

  3277.                     mb_has_coeffs = 0;

  3278.                     if(val) {

  3279.                         GET_MVDATA(dmv_x, dmv_y);

  3280.                     }

  3281.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3282.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3283.                     intra_count += s->mb_intra;

  3284.                     is_intra[i] = s->mb_intra;

  3285.                     is_coded[i] = mb_has_coeffs;

  3286.                 }

  3287.                 if(i&4){

  3288.                     is_intra[i] = (intra_count >= 3);

  3289.                     is_coded[i] = val;

  3290.                 }

  3291.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3292.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3293.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3294.             }

  3295.             // if there are no coded blocks then don't do anything more

  3296.             if(!intra_count && !coded_inter) return 0;

  3297.             dst_idx = 0;

  3298.             GET_MQUANT();

  3299.             s->current_picture.qscale_table[mb_pos] = mquant;

  3300.             /* test if block is intra and has pred */

  3301.             {

  3302.                 int intrapred = 0;

  3303.                 for(i=0; i<6; i++)

  3304.                     if(is_intra[i]) {

  3305.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3306.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3307.                             intrapred = 1;

  3308.                             break;

  3309.                         }

  3310.                     }

  3311.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3312.                 else s->ac_pred = 0;

  3313.             }

  3314.             if (!v->ttmbf && coded_inter)

  3315.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3316.             for (i=0; i<6; i++)

  3317.             {

  3318.                 dst_idx += i >> 2;

  3319.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3320.                 s->mb_intra = is_intra[i];

  3321.                 if (is_intra[i]) {

  3322.                     /* check if prediction blocks A and C are available */

  3323.                     v->a_avail = v->c_avail = 0;

  3324.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3325.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3326.                     if(i == 1 || i == 3 || s->mb_x)

  3327.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3328. 

  3329.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3330.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3331.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3332.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3333.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3334.                     if(v->pq >= 9 && v->overlap) {

  3335.                         if(v->c_avail)

  3336.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3337.                         if(v->a_avail)

  3338.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3339.                     }

  3340.                     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)){

  3341.                         int left_cbp, top_cbp;

  3342.                         if(i & 4){

  3343.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3344.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3345.                         }else{

  3346.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3347.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3348.                         }

  3349.                         if(left_cbp & 0xC)

  3350.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3351.                         if(top_cbp  & 0xA)

  3352.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3353.                     }

  3354.                     block_cbp |= 0xF << (i << 2);

  3355.                 } else if(is_coded[i]) {

  3356.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3357.                     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)){

  3358.                         filter = 1;

  3359.                         if(i & 4){

  3360.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3361.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3362.                         }else{

  3363.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3364.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3365.                         }

  3366.                         if(left_cbp & 0xC)

  3367.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3368.                         if(top_cbp  & 0xA)

  3369.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3370.                     }

  3371.                     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);

  3372.                     block_cbp |= pat << (i << 2);

  3373.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3374.                     first_block = 0;

  3375.                 }

  3376.             }

  3377.             return 0;

  3378.         }

  3379.         else //Skipped MB

  3380.         {

  3381.             s->mb_intra = 0;

  3382.             s->current_picture.qscale_table[mb_pos] = 0;

  3383.             for (i=0; i<6; i++) {

  3384.                 v->mb_type[0][s->block_index[i]] = 0;

  3385.                 s->dc_val[0][s->block_index[i]] = 0;

  3386.             }

  3387.             for (i=0; i<4; i++)

  3388.             {

  3389.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3390.                 vc1_mc_4mv_luma(v, i);

  3391.             }

  3392.             vc1_mc_4mv_chroma(v);

  3393.             s->current_picture.qscale_table[mb_pos] = 0;

  3394.             return 0;

  3395.         }

  3396.     }

  3397.     v->cbp[s->mb_x] = block_cbp;

  3398. 

  3399.     /* Should never happen */

  3400.     return -1;

  3401. }

  3402. 

  3403. /** Decode one B-frame MB (in Main profile)

  3404.  */

  3405. static void vc1_decode_b_mb(VC1Context *v)

  3406. {

  3407.     MpegEncContext *s = &v->s;

  3408.     GetBitContext *gb = &s->gb;

  3409.     int i, j;

  3410.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3411.     int cbp = 0; /* cbp decoding stuff */

  3412.     int mqdiff, mquant; /* MB quantization */

  3413.     int ttmb = v->ttfrm; /* MB Transform type */

  3414.     int mb_has_coeffs = 0; /* last_flag */

  3415.     int index, index1; /* LUT indexes */

  3416.     int val, sign; /* temp values */

  3417.     int first_block = 1;

  3418.     int dst_idx, off;

  3419.     int skipped, direct;

  3420.     int dmv_x[2], dmv_y[2];

  3421.     int bmvtype = BMV_TYPE_BACKWARD;

  3422. 

  3423.     mquant = v->pq; /* Loosy initialization */

  3424.     s->mb_intra = 0;

  3425. 

  3426.     if (v->dmb_is_raw)

  3427.         direct = get_bits1(gb);

  3428.     else

  3429.         direct = v->direct_mb_plane[mb_pos];

  3430.     if (v->skip_is_raw)

  3431.         skipped = get_bits1(gb);

  3432.     else

  3433.         skipped = v->s.mbskip_table[mb_pos];

  3434. 

  3435.     s->dsp.clear_blocks(s->block[0]);

  3436.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3437.     for(i = 0; i < 6; i++) {

  3438.         v->mb_type[0][s->block_index[i]] = 0;

  3439.         s->dc_val[0][s->block_index[i]] = 0;

  3440.     }

  3441.     s->current_picture.qscale_table[mb_pos] = 0;

  3442. 

  3443.     if (!direct) {

  3444.         if (!skipped) {

  3445.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3446.             dmv_x[1] = dmv_x[0];

  3447.             dmv_y[1] = dmv_y[0];

  3448.         }

  3449.         if(skipped || !s->mb_intra) {

  3450.             bmvtype = decode012(gb);

  3451.             switch(bmvtype) {

  3452.             case 0:

  3453.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3454.                 break;

  3455.             case 1:

  3456.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3457.                 break;

  3458.             case 2:

  3459.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3460.                 dmv_x[0] = dmv_y[0] = 0;

  3461.             }

  3462.         }

  3463.     }

  3464.     for(i = 0; i < 6; i++)

  3465.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3466. 

  3467.     if (skipped) {

  3468.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3469.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3470.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3471.         return;

  3472.     }

  3473.     if (direct) {

  3474.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3475.         GET_MQUANT();

  3476.         s->mb_intra = 0;

  3477.         mb_has_coeffs = 0;

  3478.         s->current_picture.qscale_table[mb_pos] = mquant;

  3479.         if(!v->ttmbf)

  3480.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3481.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3482.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3483.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3484.     } else {

  3485.         if(!mb_has_coeffs && !s->mb_intra) {

  3486.             /* no coded blocks - effectively skipped */

  3487.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3488.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3489.             return;

  3490.         }

  3491.         if(s->mb_intra && !mb_has_coeffs) {

  3492.             GET_MQUANT();

  3493.             s->current_picture.qscale_table[mb_pos] = mquant;

  3494.             s->ac_pred = get_bits1(gb);

  3495.             cbp = 0;

  3496.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3497.         } else {

  3498.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3499.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3500.                 if(!mb_has_coeffs) {

  3501.                     /* interpolated skipped block */

  3502.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3503.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3504.                     return;

  3505.                 }

  3506.             }

  3507.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3508.             if(!s->mb_intra) {

  3509.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3510.             }

  3511.             if(s->mb_intra)

  3512.                 s->ac_pred = get_bits1(gb);

  3513.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3514.             GET_MQUANT();

  3515.             s->current_picture.qscale_table[mb_pos] = mquant;

  3516.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3517.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3518.         }

  3519.     }

  3520.     dst_idx = 0;

  3521.     for (i=0; i<6; i++)

  3522.     {

  3523.         s->dc_val[0][s->block_index[i]] = 0;

  3524.         dst_idx += i >> 2;

  3525.         val = ((cbp >> (5 - i)) & 1);

  3526.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3527.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3528.         if(s->mb_intra) {

  3529.             /* check if prediction blocks A and C are available */

  3530.             v->a_avail = v->c_avail = 0;

  3531.             if(i == 2 || i == 3 || !s->first_slice_line)

  3532.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3533.             if(i == 1 || i == 3 || s->mb_x)

  3534.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3535. 

  3536.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3537.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3538.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3539.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3540.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3541.         } else if(val) {

  3542.             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);

  3543.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3544.             first_block = 0;

  3545.         }

  3546.     }

  3547. }

  3548. 

  3549. /** Decode blocks of I-frame

  3550.  */

  3551. static void vc1_decode_i_blocks(VC1Context *v)

  3552. {

  3553.     int k, j;

  3554.     MpegEncContext *s = &v->s;

  3555.     int cbp, val;

  3556.     uint8_t *coded_val;

  3557.     int mb_pos;

  3558. 

  3559.     /* select codingmode used for VLC tables selection */

  3560.     switch(v->y_ac_table_index){

  3561.     case 0:

  3562.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3563.         break;

  3564.     case 1:

  3565.         v->codingset = CS_HIGH_MOT_INTRA;

  3566.         break;

  3567.     case 2:

  3568.         v->codingset = CS_MID_RATE_INTRA;

  3569.         break;

  3570.     }

  3571. 

  3572.     switch(v->c_ac_table_index){

  3573.     case 0:

  3574.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3575.         break;

  3576.     case 1:

  3577.         v->codingset2 = CS_HIGH_MOT_INTER;

  3578.         break;

  3579.     case 2:

  3580.         v->codingset2 = CS_MID_RATE_INTER;

  3581.         break;

  3582.     }

  3583. 

  3584.     /* Set DC scale - y and c use the same */

  3585.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3586.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3587. 

  3588.     //do frame decode

  3589.     s->mb_x = s->mb_y = 0;

  3590.     s->mb_intra = 1;

  3591.     s->first_slice_line = 1;

  3592.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3593.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3594.             ff_init_block_index(s);

  3595.             ff_update_block_index(s);

  3596.             s->dsp.clear_blocks(s->block[0]);

  3597.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3598.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3599.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3600.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3601.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3602. 

  3603.             // do actual MB decoding and displaying

  3604.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3605.             v->s.ac_pred = get_bits1(&v->s.gb);

  3606. 

  3607.             for(k = 0; k < 6; k++) {

  3608.                 val = ((cbp >> (5 - k)) & 1);

  3609. 

  3610.                 if (k < 4) {

  3611.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3612.                     val = val ^ pred;

  3613.                     *coded_val = val;

  3614.                 }

  3615.                 cbp |= val << (5 - k);

  3616. 

  3617.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3618. 

  3619.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3620.                 if(v->pq >= 9 && v->overlap) {

  3621.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3622.                 }

  3623.             }

  3624. 

  3625.             vc1_put_block(v, s->block);

  3626.             if(v->pq >= 9 && v->overlap) {

  3627.                 if(s->mb_x) {

  3628.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3629.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3630.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3631.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3632.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3633.                     }

  3634.                 }

  3635.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3636.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3637.                 if(!s->first_slice_line) {

  3638.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3639.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3640.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3641.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3642.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3643.                     }

  3644.                 }

  3645.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3646.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3647.             }

  3648.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]);

  3649. 

  3650.             if(get_bits_count(&s->gb) > v->bits) {

  3651.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3652.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3653.                 return;

  3654.             }

  3655.         }

  3656.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3657.         s->first_slice_line = 0;

  3658.     }

  3659.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3660. }

  3661. 

  3662. /** Decode blocks of I-frame for advanced profile

  3663.  */

  3664. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3665. {

  3666.     int k, j;

  3667.     MpegEncContext *s = &v->s;

  3668.     int cbp, val;

  3669.     uint8_t *coded_val;

  3670.     int mb_pos;

  3671.     int mquant = v->pq;

  3672.     int mqdiff;

  3673.     int overlap;

  3674.     GetBitContext *gb = &s->gb;

  3675. 

  3676.     /* select codingmode used for VLC tables selection */

  3677.     switch(v->y_ac_table_index){

  3678.     case 0:

  3679.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3680.         break;

  3681.     case 1:

  3682.         v->codingset = CS_HIGH_MOT_INTRA;

  3683.         break;

  3684.     case 2:

  3685.         v->codingset = CS_MID_RATE_INTRA;

  3686.         break;

  3687.     }

  3688. 

  3689.     switch(v->c_ac_table_index){

  3690.     case 0:

  3691.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3692.         break;

  3693.     case 1:

  3694.         v->codingset2 = CS_HIGH_MOT_INTER;

  3695.         break;

  3696.     case 2:

  3697.         v->codingset2 = CS_MID_RATE_INTER;

  3698.         break;

  3699.     }

  3700. 

  3701.     //do frame decode

  3702.     s->mb_x = s->mb_y = 0;

  3703.     s->mb_intra = 1;

  3704.     s->first_slice_line = 1;

  3705.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3706.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3707.             ff_init_block_index(s);

  3708.             ff_update_block_index(s);

  3709.             s->dsp.clear_blocks(s->block[0]);

  3710.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3711.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3712.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3713.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3714. 

  3715.             // do actual MB decoding and displaying

  3716.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3717.             if(v->acpred_is_raw)

  3718.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3719.             else

  3720.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3721. 

  3722.             if(v->condover == CONDOVER_SELECT) {

  3723.                 if(v->overflg_is_raw)

  3724.                     overlap = get_bits1(&v->s.gb);

  3725.                 else

  3726.                     overlap = v->over_flags_plane[mb_pos];

  3727.             } else

  3728.                 overlap = (v->condover == CONDOVER_ALL);

  3729. 

  3730.             GET_MQUANT();

  3731. 

  3732.             s->current_picture.qscale_table[mb_pos] = mquant;

  3733.             /* Set DC scale - y and c use the same */

  3734.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3735.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3736. 

  3737.             for(k = 0; k < 6; k++) {

  3738.                 val = ((cbp >> (5 - k)) & 1);

  3739. 

  3740.                 if (k < 4) {

  3741.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3742.                     val = val ^ pred;

  3743.                     *coded_val = val;

  3744.                 }

  3745.                 cbp |= val << (5 - k);

  3746. 

  3747.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3748.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3749. 

  3750.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3751. 

  3752.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3753.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3754.             }

  3755. 

  3756.             vc1_put_block(v, s->block);

  3757.             if(overlap) {

  3758.                 if(s->mb_x) {

  3759.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3760.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3761.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3762.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3763.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3764.                     }

  3765.                 }

  3766.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3767.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3768.                 if(!s->first_slice_line) {

  3769.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3770.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3771.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3772.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3773.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3774.                     }

  3775.                 }

  3776.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3777.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3778.             }

  3779.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]);

  3780. 

  3781.             if(get_bits_count(&s->gb) > v->bits) {

  3782.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3783.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3784.                 return;

  3785.             }

  3786.         }

  3787.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3788.         s->first_slice_line = 0;

  3789.     }

  3790.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3791. }

  3792. 

  3793. static void vc1_decode_p_blocks(VC1Context *v)

  3794. {

  3795.     MpegEncContext *s = &v->s;

  3796. 

  3797.     /* select codingmode used for VLC tables selection */

  3798.     switch(v->c_ac_table_index){

  3799.     case 0:

  3800.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3801.         break;

  3802.     case 1:

  3803.         v->codingset = CS_HIGH_MOT_INTRA;

  3804.         break;

  3805.     case 2:

  3806.         v->codingset = CS_MID_RATE_INTRA;

  3807.         break;

  3808.     }

  3809. 

  3810.     switch(v->c_ac_table_index){

  3811.     case 0:

  3812.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3813.         break;

  3814.     case 1:

  3815.         v->codingset2 = CS_HIGH_MOT_INTER;

  3816.         break;

  3817.     case 2:

  3818.         v->codingset2 = CS_MID_RATE_INTER;

  3819.         break;

  3820.     }

  3821. 

  3822.     s->first_slice_line = 1;

  3823.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  3824.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3825.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3826.             ff_init_block_index(s);

  3827.             ff_update_block_index(s);

  3828.             s->dsp.clear_blocks(s->block[0]);

  3829. 

  3830.             vc1_decode_p_mb(v);

  3831.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3832.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3833.                 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);

  3834.                 return;

  3835.             }

  3836.         }

  3837.         memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride);

  3838.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3839.         s->first_slice_line = 0;

  3840.     }

  3841.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3842. }

  3843. 

  3844. static void vc1_decode_b_blocks(VC1Context *v)

  3845. {

  3846.     MpegEncContext *s = &v->s;

  3847. 

  3848.     /* select codingmode used for VLC tables selection */

  3849.     switch(v->c_ac_table_index){

  3850.     case 0:

  3851.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3852.         break;

  3853.     case 1:

  3854.         v->codingset = CS_HIGH_MOT_INTRA;

  3855.         break;

  3856.     case 2:

  3857.         v->codingset = CS_MID_RATE_INTRA;

  3858.         break;

  3859.     }

  3860. 

  3861.     switch(v->c_ac_table_index){

  3862.     case 0:

  3863.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3864.         break;

  3865.     case 1:

  3866.         v->codingset2 = CS_HIGH_MOT_INTER;

  3867.         break;

  3868.     case 2:

  3869.         v->codingset2 = CS_MID_RATE_INTER;

  3870.         break;

  3871.     }

  3872. 

  3873.     s->first_slice_line = 1;

  3874.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3875.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3876.             ff_init_block_index(s);

  3877.             ff_update_block_index(s);

  3878.             s->dsp.clear_blocks(s->block[0]);

  3879. 

  3880.             vc1_decode_b_mb(v);

  3881.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3882.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3883.                 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);

  3884.                 return;

  3885.             }

  3886.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[s->mb_x + s->mb_y *s->mb_stride]);

  3887.         }

  3888.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3889.         s->first_slice_line = 0;

  3890.     }

  3891.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3892. }

  3893. 

  3894. static void vc1_decode_skip_blocks(VC1Context *v)

  3895. {

  3896.     MpegEncContext *s = &v->s;

  3897. 

  3898.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3899.     s->first_slice_line = 1;

  3900.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3901.         s->mb_x = 0;

  3902.         ff_init_block_index(s);

  3903.         ff_update_block_index(s);

  3904.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3905.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3906.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3907.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3908.         s->first_slice_line = 0;

  3909.     }

  3910.     s->pict_type = FF_P_TYPE;

  3911. }

  3912. 

  3913. static void vc1_decode_blocks(VC1Context *v)

  3914. {

  3915. 

  3916.     v->s.esc3_level_length = 0;

  3917.     if(v->x8_type){

  3918.         ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );

  3919.     }else{

  3920. 

  3921.         switch(v->s.pict_type) {

  3922.         case FF_I_TYPE:

  3923.             if(v->profile == PROFILE_ADVANCED)

  3924.                 vc1_decode_i_blocks_adv(v);

  3925.             else

  3926.                 vc1_decode_i_blocks(v);

  3927.             break;

  3928.         case FF_P_TYPE:

  3929.             if(v->p_frame_skipped)

  3930.                 vc1_decode_skip_blocks(v);

  3931.             else

  3932.                 vc1_decode_p_blocks(v);

  3933.             break;

  3934.         case FF_B_TYPE:

  3935.             if(v->bi_type){

  3936.                 if(v->profile == PROFILE_ADVANCED)

  3937.                     vc1_decode_i_blocks_adv(v);

  3938.                 else

  3939.                     vc1_decode_i_blocks(v);

  3940.             }else

  3941.                 vc1_decode_b_blocks(v);

  3942.             break;

  3943.         }

  3944.     }

  3945. }

  3946. 

  3947. /** Find VC-1 marker in buffer

  3948.  * @return position where next marker starts or end of buffer if no marker found

  3949.  */

  3950. static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)

  3951. {

  3952.     uint32_t mrk = 0xFFFFFFFF;

  3953. 

  3954.     if(end-src < 4) return end;

  3955.     while(src < end){

  3956.         mrk = (mrk << 8) | *src++;

  3957.         if(IS_MARKER(mrk))

  3958.             return src-4;

  3959.     }

  3960.     return end;

  3961. }

  3962. 

  3963. static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)

  3964. {

  3965.     int dsize = 0, i;

  3966. 

  3967.     if(size < 4){

  3968.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  3969.         return size;

  3970.     }

  3971.     for(i = 0; i < size; i++, src++) {

  3972.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  3973.             dst[dsize++] = src[1];

  3974.             src++;

  3975.             i++;

  3976.         } else

  3977.             dst[dsize++] = *src;

  3978.     }

  3979.     return dsize;

  3980. }

  3981. 

  3982. /** Initialize a VC1/WMV3 decoder

  3983.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3984.  * @todo TODO: Decypher remaining bits in extra_data

  3985.  */

  3986. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  3987. {

  3988.     VC1Context *v = avctx->priv_data;

  3989.     MpegEncContext *s = &v->s;

  3990.     GetBitContext gb;

  3991. 

  3992.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  3993.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  3994.         avctx->pix_fmt = PIX_FMT_YUV420P;

  3995.     else

  3996.         avctx->pix_fmt = PIX_FMT_GRAY8;

  3997.     v->s.avctx = avctx;

  3998.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  3999.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  4000. 

  4001.     if(avctx->idct_algo==FF_IDCT_AUTO){

  4002.         avctx->idct_algo=FF_IDCT_WMV2;

  4003.     }

  4004. 

  4005.     if(ff_h263_decode_init(avctx) < 0)

  4006.         return -1;

  4007.     if (vc1_init_common(v) < 0) return -1;

  4008. 

  4009.     avctx->coded_width = avctx->width;

  4010.     avctx->coded_height = avctx->height;

  4011.     if (avctx->codec_id == CODEC_ID_WMV3)

  4012.     {

  4013.         int count = 0;

  4014. 

  4015.         // looks like WMV3 has a sequence header stored in the extradata

  4016.         // advanced sequence header may be before the first frame

  4017.         // the last byte of the extradata is a version number, 1 for the

  4018.         // samples we can decode

  4019. 

  4020.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  4021. 

  4022.         if (decode_sequence_header(avctx, &gb) < 0)

  4023.           return -1;

  4024. 

  4025.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  4026.         if (count>0)

  4027.         {

  4028.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  4029.                    count, get_bits(&gb, count));

  4030.         }

  4031.         else if (count < 0)

  4032.         {

  4033.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  4034.         }

  4035.     } else { // VC1/WVC1

  4036.         const uint8_t *start = avctx->extradata;

  4037.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  4038.         const uint8_t *next;

  4039.         int size, buf2_size;

  4040.         uint8_t *buf2 = NULL;

  4041.         int seq_initialized = 0, ep_initialized = 0;

  4042. 

  4043.         if(avctx->extradata_size < 16) {

  4044.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  4045.             return -1;

  4046.         }

  4047. 

  4048.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4049.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  4050.         next = start;

  4051.         for(; next < end; start = next){

  4052.             next = find_next_marker(start + 4, end);

  4053.             size = next - start - 4;

  4054.             if(size <= 0) continue;

  4055.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  4056.             init_get_bits(&gb, buf2, buf2_size * 8);

  4057.             switch(AV_RB32(start)){

  4058.             case VC1_CODE_SEQHDR:

  4059.                 if(decode_sequence_header(avctx, &gb) < 0){

  4060.                     av_free(buf2);

  4061.                     return -1;

  4062.                 }

  4063.                 seq_initialized = 1;

  4064.                 break;

  4065.             case VC1_CODE_ENTRYPOINT:

  4066.                 if(decode_entry_point(avctx, &gb) < 0){

  4067.                     av_free(buf2);

  4068.                     return -1;

  4069.                 }

  4070.                 ep_initialized = 1;

  4071.                 break;

  4072.             }

  4073.         }

  4074.         av_free(buf2);

  4075.         if(!seq_initialized || !ep_initialized){

  4076.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4077.             return -1;

  4078.         }

  4079.     }

  4080.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4081.     s->low_delay = !avctx->has_b_frames;

  4082. 

  4083.     s->mb_width = (avctx->coded_width+15)>>4;

  4084.     s->mb_height = (avctx->coded_height+15)>>4;

  4085. 

  4086.     /* Allocate mb bitplanes */

  4087.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4088.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4089.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4090.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4091. 

  4092.     v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  4093.     v->cbp = v->cbp_base + s->mb_stride;

  4094. 

  4095.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4096.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4097.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4098.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4099.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4100. 

  4101.     /* Init coded blocks info */

  4102.     if (v->profile == PROFILE_ADVANCED)

  4103.     {

  4104. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4105. //            return -1;

  4106. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4107. //            return -1;

  4108.     }

  4109. 

  4110.     ff_intrax8_common_init(&v->x8,s);

  4111.     return 0;

  4112. }

  4113. 

  4114. 

  4115. /** Decode a VC1/WMV3 frame

  4116.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4117.  */

  4118. static int vc1_decode_frame(AVCodecContext *avctx,

  4119.                             void *data, int *data_size,

  4120.                             const uint8_t *buf, int buf_size)

  4121. {

  4122.     VC1Context *v = avctx->priv_data;

  4123.     MpegEncContext *s = &v->s;

  4124.     AVFrame *pict = data;

  4125.     uint8_t *buf2 = NULL;

  4126.     const uint8_t *buf_vdpau = buf;

  4127. 

  4128.     /* no supplementary picture */

  4129.     if (buf_size == 0) {

  4130.         /* special case for last picture */

  4131.         if (s->low_delay==0 && s->next_picture_ptr) {

  4132.             *pict= *(AVFrame*)s->next_picture_ptr;

  4133.             s->next_picture_ptr= NULL;

  4134. 

  4135.             *data_size = sizeof(AVFrame);

  4136.         }

  4137. 

  4138.         return 0;

  4139.     }

  4140. 

  4141.     /* We need to set current_picture_ptr before reading the header,

  4142.      * otherwise we cannot store anything in there. */

  4143.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4144.         int i= ff_find_unused_picture(s, 0);

  4145.         s->current_picture_ptr= &s->picture[i];

  4146.     }

  4147. 

  4148.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){

  4149.         if (v->profile < PROFILE_ADVANCED)

  4150.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  4151.         else

  4152.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  4153.     }

  4154. 

  4155.     //for advanced profile we may need to parse and unescape data

  4156.     if (avctx->codec_id == CODEC_ID_VC1) {

  4157.         int buf_size2 = 0;

  4158.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4159. 

  4160.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4161.             const uint8_t *start, *end, *next;

  4162.             int size;

  4163. 

  4164.             next = buf;

  4165.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4166.                 next = find_next_marker(start + 4, end);

  4167.                 size = next - start - 4;

  4168.                 if(size <= 0) continue;

  4169.                 switch(AV_RB32(start)){

  4170.                 case VC1_CODE_FRAME:

  4171.                     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4172.                         buf_vdpau = start;

  4173.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4174.                     break;

  4175.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4176.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4177.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4178.                     decode_entry_point(avctx, &s->gb);

  4179.                     break;

  4180.                 case VC1_CODE_SLICE:

  4181.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4182.                     av_free(buf2);

  4183.                     return -1;

  4184.                 }

  4185.             }

  4186.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4187.             const uint8_t *divider;

  4188. 

  4189.             divider = find_next_marker(buf, buf + buf_size);

  4190.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4191.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4192.                 av_free(buf2);

  4193.                 return -1;

  4194.             }

  4195. 

  4196.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4197.             // TODO

  4198.             av_free(buf2);return -1;

  4199.         }else{

  4200.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4201.         }

  4202.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4203.     } else

  4204.         init_get_bits(&s->gb, buf, buf_size*8);

  4205.     // do parse frame header

  4206.     if(v->profile < PROFILE_ADVANCED) {

  4207.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4208.             av_free(buf2);

  4209.             return -1;

  4210.         }

  4211.     } else {

  4212.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4213.             av_free(buf2);

  4214.             return -1;

  4215.         }

  4216.     }

  4217. 

  4218.     if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){

  4219.         av_free(buf2);

  4220.         return -1;

  4221.     }

  4222. 

  4223.     // for hurry_up==5

  4224.     s->current_picture.pict_type= s->pict_type;

  4225.     s->current_picture.key_frame= s->pict_type == FF_I_TYPE;

  4226. 

  4227.     /* skip B-frames if we don't have reference frames */

  4228.     if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){

  4229.         av_free(buf2);

  4230.         return -1;//buf_size;

  4231.     }

  4232.     /* skip b frames if we are in a hurry */

  4233.     if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;

  4234.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)

  4235.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)

  4236.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4237.         av_free(buf2);

  4238.         return buf_size;

  4239.     }

  4240.     /* skip everything if we are in a hurry>=5 */

  4241.     if(avctx->hurry_up>=5) {

  4242.         av_free(buf2);

  4243.         return -1;//buf_size;

  4244.     }

  4245. 

  4246.     if(s->next_p_frame_damaged){

  4247.         if(s->pict_type==FF_B_TYPE)

  4248.             return buf_size;

  4249.         else

  4250.             s->next_p_frame_damaged=0;

  4251.     }

  4252. 

  4253.     if(MPV_frame_start(s, avctx) < 0) {

  4254.         av_free(buf2);

  4255.         return -1;

  4256.     }

  4257. 

  4258.     s->me.qpel_put= s->dsp.put_qpel_pixels_tab;

  4259.     s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;

  4260. 

  4261.     if ((CONFIG_VC1_VDPAU_DECODER || CONFIG_WMV3_VDPAU_DECODER)

  4262.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4263.         ff_vdpau_vc1_decode_picture(s, buf_vdpau, (buf + buf_size) - buf_vdpau);

  4264.     else {

  4265.         ff_er_frame_start(s);

  4266. 

  4267.         v->bits = buf_size * 8;

  4268.         vc1_decode_blocks(v);

  4269. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4270. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4271. //      return -1;

  4272.         ff_er_frame_end(s);

  4273.     }

  4274. 

  4275.     MPV_frame_end(s);

  4276. 

  4277. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4278. assert(s->current_picture.pict_type == s->pict_type);

  4279.     if (s->pict_type == FF_B_TYPE || s->low_delay) {

  4280.         *pict= *(AVFrame*)s->current_picture_ptr;

  4281.     } else if (s->last_picture_ptr != NULL) {

  4282.         *pict= *(AVFrame*)s->last_picture_ptr;

  4283.     }

  4284. 

  4285.     if(s->last_picture_ptr || s->low_delay){

  4286.         *data_size = sizeof(AVFrame);

  4287.         ff_print_debug_info(s, pict);

  4288.     }

  4289. 

  4290.     /* Return the Picture timestamp as the frame number */

  4291.     /* we subtract 1 because it is added on utils.c     */

  4292.     avctx->frame_number = s->picture_number - 1;

  4293. 

  4294.     av_free(buf2);

  4295.     return buf_size;

  4296. }

  4297. 

  4298. 

  4299. /** Close a VC1/WMV3 decoder

  4300.  * @warning Initial try at using MpegEncContext stuff

  4301.  */

  4302. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  4303. {

  4304.     VC1Context *v = avctx->priv_data;

  4305. 

  4306.     av_freep(&v->hrd_rate);

  4307.     av_freep(&v->hrd_buffer);

  4308.     MPV_common_end(&v->s);

  4309.     av_freep(&v->mv_type_mb_plane);

  4310.     av_freep(&v->direct_mb_plane);

  4311.     av_freep(&v->acpred_plane);

  4312.     av_freep(&v->over_flags_plane);

  4313.     av_freep(&v->mb_type_base);

  4314.     av_freep(&v->cbp_base);

  4315.     ff_intrax8_common_end(&v->x8);

  4316.     return 0;

  4317. }

  4318. 

  4319. 

  4320. AVCodec vc1_decoder = {

  4321.     "vc1",

  4322.     CODEC_TYPE_VIDEO,

  4323.     CODEC_ID_VC1,

  4324.     sizeof(VC1Context),

  4325.     vc1_decode_init,

  4326.     NULL,

  4327.     vc1_decode_end,

  4328.     vc1_decode_frame,

  4329.     CODEC_CAP_DELAY,

  4330.     NULL,

  4331.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  4332. };

  4333. 

  4334. AVCodec wmv3_decoder = {

  4335.     "wmv3",

  4336.     CODEC_TYPE_VIDEO,

  4337.     CODEC_ID_WMV3,

  4338.     sizeof(VC1Context),

  4339.     vc1_decode_init,

  4340.     NULL,

  4341.     vc1_decode_end,

  4342.     vc1_decode_frame,

  4343.     CODEC_CAP_DELAY,

  4344.     NULL,

  4345.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  4346. };

  4347. 

  4348. #if CONFIG_WMV3_VDPAU_DECODER

  4349. AVCodec wmv3_vdpau_decoder = {

  4350.     "wmv3_vdpau",

  4351.     CODEC_TYPE_VIDEO,

  4352.     CODEC_ID_WMV3,

  4353.     sizeof(VC1Context),

  4354.     vc1_decode_init,

  4355.     NULL,

  4356.     vc1_decode_end,

  4357.     vc1_decode_frame,

  4358.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4359.     NULL,

  4360.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  4361. };

  4362. #endif

  4363. 

  4364. #if CONFIG_VC1_VDPAU_DECODER

  4365. AVCodec vc1_vdpau_decoder = {

  4366.     "vc1_vdpau",

  4367.     CODEC_TYPE_VIDEO,

  4368.     CODEC_ID_VC1,

  4369.     sizeof(VC1Context),

  4370.     vc1_decode_init,

  4371.     NULL,

  4372.     vc1_decode_end,

  4373.     vc1_decode_frame,

  4374.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4375.     NULL,

  4376.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  4377. };

  4378. #endif