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FFmpeg/libavcodec/vc1.c

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  1. /*

  2.  * VC-1 and WMV3 decoder

  3.  * Copyright (c) 2006-2007 Konstantin Shishkov

  4.  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. /**

  24.  * @file libavcodec/vc1.c

  25.  * VC-1 and WMV3 decoder

  26.  *

  27.  */

  28. #include "internal.h"

  29. #include "dsputil.h"

  30. #include "avcodec.h"

  31. #include "mpegvideo.h"

  32. #include "vc1.h"

  33. #include "vc1data.h"

  34. #include "vc1acdata.h"

  35. #include "msmpeg4data.h"

  36. #include "unary.h"

  37. #include "simple_idct.h"

  38. #include "mathops.h"

  39. #include "vdpau_internal.h"

  40. 

  41. #undef NDEBUG

  42. #include <assert.h>

  43. 

  44. #define MB_INTRA_VLC_BITS 9

  45. #define DC_VLC_BITS 9

  46. #define AC_VLC_BITS 9

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

  48. 

  49. 

  50. /**

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

  52.  * @param v The VC1Context to initialize

  53.  * @return Status

  54.  */

  55. static int vc1_init_common(VC1Context *v)

  56. {

  57.     static int done = 0;

  58.     int i = 0;

  59. 

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

  61. 

  62.     /* VLC tables */

  63.     if(!done)

  64.     {

  65.         done = 1;

  66.         init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  67.                  ff_vc1_bfraction_bits, 1, 1,

  68.                  ff_vc1_bfraction_codes, 1, 1, INIT_VLC_USE_STATIC);

  69.         init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  70.                  ff_vc1_norm2_bits, 1, 1,

  71.                  ff_vc1_norm2_codes, 1, 1, INIT_VLC_USE_STATIC);

  72.         init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  73.                  ff_vc1_norm6_bits, 1, 1,

  74.                  ff_vc1_norm6_codes, 2, 2, INIT_VLC_USE_STATIC);

  75.         init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  76.                  ff_vc1_imode_bits, 1, 1,

  77.                  ff_vc1_imode_codes, 1, 1, INIT_VLC_USE_STATIC);

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

  79.         {

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

  81.                      ff_vc1_ttmb_bits[i], 1, 1,

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

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

  84.                      ff_vc1_ttblk_bits[i], 1, 1,

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

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

  87.                      ff_vc1_subblkpat_bits[i], 1, 1,

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

  89.         }

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

  91.         {

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

  93.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

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

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

  96.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

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

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

  99.                      ff_vc1_mv_diff_bits[i], 1, 1,

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

  101.         }

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

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

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

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

  106.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

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

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

  109.     }

  110. 

  111.     /* Other defaults */

  112.     v->pq = -1;

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

  114. 

  115.     return 0;

  116. }

  117. 

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

  119. /**

  120.  * @defgroup vc1bitplane VC-1 Bitplane decoding

  121.  * @see 8.7, p56

  122.  * @{

  123.  */

  124. 

  125. /**

  126.  * Imode types

  127.  * @{

  128.  */

  129. enum Imode {

  130.     IMODE_RAW,

  131.     IMODE_NORM2,

  132.     IMODE_DIFF2,

  133.     IMODE_NORM6,

  134.     IMODE_DIFF6,

  135.     IMODE_ROWSKIP,

  136.     IMODE_COLSKIP

  137. };

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

  139. 

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

  141.  * @param plane Buffer to store decoded bits

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

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

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

  145.  */

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

  147.     int x, y;

  148. 

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

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

  151.             memset(plane, 0, width);

  152.         else

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

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

  155.         plane += stride;

  156.     }

  157. }

  158. 

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

  160.  * @param plane Buffer to store decoded bits

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

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

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

  164.  * @todo FIXME: Optimize

  165.  */

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

  167.     int x, y;

  168. 

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

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

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

  172.                 plane[y*stride] = 0;

  173.         else

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

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

  176.         plane ++;

  177.     }

  178. }

  179. 

  180. /** Decode a bitplane's bits

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

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

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

  184.  * @return Status

  185.  * @todo FIXME: Optimize

  186.  */

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

  188. {

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

  190. 

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

  192.     uint8_t invert, *planep = data;

  193.     int width, height, stride;

  194. 

  195.     width = v->s.mb_width;

  196.     height = v->s.mb_height;

  197.     stride = v->s.mb_stride;

  198.     invert = get_bits1(gb);

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

  200. 

  201.     *raw_flag = 0;

  202.     switch (imode)

  203.     {

  204.     case IMODE_RAW:

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

  206.         *raw_flag = 1; //invert ignored

  207.         return invert;

  208.     case IMODE_DIFF2:

  209.     case IMODE_NORM2:

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

  211.         {

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

  213.             offset = 1;

  214.         }

  215.         else offset = 0;

  216.         // decode bitplane as one long line

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

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

  219.             *planep++ = code & 1;

  220.             offset++;

  221.             if(offset == width) {

  222.                 offset = 0;

  223.                 planep += stride - width;

  224.             }

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

  226.             offset++;

  227.             if(offset == width) {

  228.                 offset = 0;

  229.                 planep += stride - width;

  230.             }

  231.         }

  232.         break;

  233.     case IMODE_DIFF6:

  234.     case IMODE_NORM6:

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

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

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

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

  239.                     if(code < 0){

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

  241.                         return -1;

  242.                     }

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

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

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

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

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

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

  249.                 }

  250.                 planep += stride * 3;

  251.             }

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

  253.         } else { // 3x2

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

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

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

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

  258.                     if(code < 0){

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

  260.                         return -1;

  261.                     }

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

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

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

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

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

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

  268.                 }

  269.                 planep += stride * 2;

  270.             }

  271.             x = width % 3;

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

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

  274.         }

  275.         break;

  276.     case IMODE_ROWSKIP:

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

  278.         break;

  279.     case IMODE_COLSKIP:

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

  281.         break;

  282.     default: break;

  283.     }

  284. 

  285.     /* Applying diff operator */

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

  287.     {

  288.         planep = data;

  289.         planep[0] ^= invert;

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

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

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

  293.         {

  294.             planep += stride;

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

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

  297.             {

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

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

  300.             }

  301.         }

  302.     }

  303.     else if (invert)

  304.     {

  305.         planep = data;

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

  307.     }

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

  309. }

  310. 

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

  312. 

  313. /**

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

  315.  * @param src source block type

  316.  * @param stride block stride

  317.  * @param pq block quantizer

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

  319.  * @see 8.6

  320.  */

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

  322.     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;

  323. 

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

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

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

  327.     if(a0 < pq){

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

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

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

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

  332.             int clip_sign = clip >> 31;

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

  334.             if(clip){

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

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

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

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

  339.                 d_sign ^= a0_sign;

  340. 

  341.                 if( d_sign ^ clip_sign )

  342.                     d = 0;

  343.                 else{

  344.                     d = FFMIN(d, clip);

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

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

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

  348.                 }

  349.                 return 1;

  350.             }

  351.         }

  352.     }

  353.     return 0;

  354. }

  355. 

  356. /**

  357.  * VC-1 in-loop deblocking filter

  358.  * @param src source block type

  359.  * @param step distance between horizontally adjacent elements

  360.  * @param stride distance between vertically adjacent elements

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

  362.  * @param pq block quantizer

  363.  * @see 8.6

  364.  */

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

  366. {

  367.     int i;

  368.     int filt3;

  369. 

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

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

  372.         if(filt3){

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

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

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

  376.         }

  377.         src += step * 4;

  378.     }

  379. }

  380. 

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

  382. {

  383.     int i, j;

  384.     if(!s->first_slice_line)

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

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

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

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

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

  390.         if(!s->first_slice_line)

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

  392.         if(s->mb_x)

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

  394.     }

  395. }

  396. 

  397. /***********************************************************************/

  398. /** VOP Dquant decoding

  399.  * @param v VC-1 Context

  400.  */

  401. static int vop_dquant_decoding(VC1Context *v)

  402. {

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

  404.     int pqdiff;

  405. 

  406.     //variable size

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

  408.     {

  409.         pqdiff = get_bits(gb, 3);

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

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

  412.     }

  413.     else

  414.     {

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

  416.         if ( v->dquantfrm )

  417.         {

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

  419.             switch (v->dqprofile)

  420.             {

  421.             case DQPROFILE_SINGLE_EDGE:

  422.             case DQPROFILE_DOUBLE_EDGES:

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

  424.                 break;

  425.             case DQPROFILE_ALL_MBS:

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

  427.                 if(!v->dqbilevel)

  428.                     v->halfpq = 0;

  429.             default: break; //Forbidden ?

  430.             }

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

  432.             {

  433.                 pqdiff = get_bits(gb, 3);

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

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

  436.             }

  437.         }

  438.     }

  439.     return 0;

  440. }

  441. 

  442. /** Put block onto picture

  443.  */

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

  445. {

  446.     uint8_t *Y;

  447.     int ys, us, vs;

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

  449. 

  450.     if(v->rangeredfrm) {

  451.         int i, j, k;

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

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

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

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

  456. 

  457.     }

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

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

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

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

  462. 

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

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

  465.     Y += ys * 8;

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

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

  468. 

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

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

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

  472.     }

  473. }

  474. 

  475. /** Do motion compensation over 1 macroblock

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

  477.  */

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

  479. {

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

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

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

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

  484. 

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

  486. 

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

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

  489. 

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

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

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

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

  494.     }

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

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

  497.     if(v->fastuvmc) {

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

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

  500.     }

  501.     if(!dir) {

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

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

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

  505.     } else {

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

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

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

  509.     }

  510. 

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

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

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

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

  515. 

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

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

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

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

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

  521.     }else{

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

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

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

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

  526.     }

  527. 

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

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

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

  531. 

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

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

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

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

  536.     }

  537. 

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

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

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

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

  542. 

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

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

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

  546.         srcY = s->edge_emu_buffer;

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

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

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

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

  551.         srcU = uvbuf;

  552.         srcV = uvbuf + 16;

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

  554.         if(v->rangeredfrm) {

  555.             int i, j;

  556.             uint8_t *src, *src2;

  557. 

  558.             src = srcY;

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

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

  561.                 src += s->linesize;

  562.             }

  563.             src = srcU; src2 = srcV;

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

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

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

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

  568.                 }

  569.                 src += s->uvlinesize;

  570.                 src2 += s->uvlinesize;

  571.             }

  572.         }

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

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

  575.             int i, j;

  576.             uint8_t *src, *src2;

  577. 

  578.             src = srcY;

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

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

  581.                 src += s->linesize;

  582.             }

  583.             src = srcU; src2 = srcV;

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

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

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

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

  588.                 }

  589.                 src += s->uvlinesize;

  590.                 src2 += s->uvlinesize;

  591.             }

  592.         }

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

  594.     }

  595. 

  596.     if(s->mspel) {

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

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

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

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

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

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

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

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

  605. 

  606.         if(!v->rnd)

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

  608.         else

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

  610.     }

  611. 

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

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

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

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

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

  617.     if(!v->rnd){

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

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

  620.     }else{

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

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

  623.     }

  624. }

  625. 

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

  627.  */

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

  629. {

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

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

  632.     uint8_t *srcY;

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

  634.     int off;

  635. 

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

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

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

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

  640. 

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

  642. 

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

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

  645. 

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

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

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

  649.     }else{

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

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

  652.     }

  653. 

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

  655. 

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

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

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

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

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

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

  662.         srcY = s->edge_emu_buffer;

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

  664.         if(v->rangeredfrm) {

  665.             int i, j;

  666.             uint8_t *src;

  667. 

  668.             src = srcY;

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

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

  671.                 src += s->linesize;

  672.             }

  673.         }

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

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

  676.             int i, j;

  677.             uint8_t *src;

  678. 

  679.             src = srcY;

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

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

  682.                 src += s->linesize;

  683.             }

  684.         }

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

  686.     }

  687. 

  688.     if(s->mspel) {

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

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

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

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

  693.         if(!v->rnd)

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

  695.         else

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

  697.     }

  698. }

  699. 

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

  701. {

  702.     if(a < b) {

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

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

  705.     } else {

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

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

  708.     }

  709. }

  710. 

  711. 

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

  713.  */

  714. static void vc1_mc_4mv_chroma(VC1Context *v)

  715. {

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

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

  718.     uint8_t *srcU, *srcV;

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

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

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

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

  723. 

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

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

  726. 

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

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

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

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

  731.     }

  732. 

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

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

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

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

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

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

  739.         switch(idx) {

  740.         case 0x1:

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

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

  743.             break;

  744.         case 0x2:

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

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

  747.             break;

  748.         case 0x4:

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

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

  751.             break;

  752.         case 0x8:

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

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

  755.             break;

  756.         }

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

  758.         int t1 = 0, t2 = 0;

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

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

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

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

  763.     } else {

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

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

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

  767.     }

  768. 

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

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

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

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

  773.     if(v->fastuvmc) {

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

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

  776.     }

  777. 

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

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

  780. 

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

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

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

  784.     }else{

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

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

  787.     }

  788. 

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

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

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

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

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

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

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

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

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

  798.         srcU = s->edge_emu_buffer;

  799.         srcV = s->edge_emu_buffer + 16;

  800. 

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

  802.         if(v->rangeredfrm) {

  803.             int i, j;

  804.             uint8_t *src, *src2;

  805. 

  806.             src = srcU; src2 = srcV;

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

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

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

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

  811.                 }

  812.                 src += s->uvlinesize;

  813.                 src2 += s->uvlinesize;

  814.             }

  815.         }

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

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

  818.             int i, j;

  819.             uint8_t *src, *src2;

  820. 

  821.             src = srcU; src2 = srcV;

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

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

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

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

  826.                 }

  827.                 src += s->uvlinesize;

  828.                 src2 += s->uvlinesize;

  829.             }

  830.         }

  831.     }

  832. 

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

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

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

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

  837.     if(!v->rnd){

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

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

  840.     }else{

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

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

  843.     }

  844. }

  845. 

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

  847. 

  848. /**

  849.  * Decode Simple/Main Profiles sequence header

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

  851.  * @param avctx Codec context

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

  853.  * @return Status

  854.  */

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

  856. {

  857.     VC1Context *v = avctx->priv_data;

  858. 

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

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

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

  862.     {

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

  864.     }

  865. 

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

  867.     {

  868.         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;

  869.         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;

  870.         return decode_sequence_header_adv(v, gb);

  871.     }

  872.     else

  873.     {

  874.         v->zz_8x4 = wmv2_scantableA;

  875.         v->zz_4x8 = wmv2_scantableB;

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

  877.         if (v->res_sm)

  878.         {

  879.             av_log(avctx, AV_LOG_ERROR,

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

  881.             return -1;

  882.         }

  883.     }

  884. 

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

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

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

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

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

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

  891.     {

  892.         av_log(avctx, AV_LOG_ERROR,

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

  894.     }

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

  896.         v->s.loop_filter = 0;

  897. 

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

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

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

  901.     if (!v->res_fasttx)

  902.     {

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

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

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

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

  907.     }

  908. 

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

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

  911.     {

  912.         av_log(avctx, AV_LOG_ERROR,

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

  914.         return -1;

  915.     }

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

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

  918.     {

  919.         av_log(avctx, AV_LOG_ERROR,

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

  921.         return -1;

  922.     }

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

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

  925. 

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

  927.     if (v->res_transtab)

  928.     {

  929.         av_log(avctx, AV_LOG_ERROR,

  930.                "1 for reserved RES_TRANSTAB is forbidden\n");

  931.         return -1;

  932.     }

  933. 

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

  935. 

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

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

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

  939.     {

  940.         av_log(avctx, AV_LOG_INFO,

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

  942.     }

  943. 

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

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

  946. 

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

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

  949.     if (!v->res_rtm_flag)

  950.     {

  951. //            av_log(avctx, AV_LOG_ERROR,

  952. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  953.         av_log(avctx, AV_LOG_ERROR,

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

  955.         //return -1;

  956.     }

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

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

  959.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  968.                );

  969.     return 0;

  970. }

  971. 

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

  973. {

  974.     v->res_rtm_flag = 1;

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

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

  977.     {

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

  979.     }

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

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

  982.     {

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

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

  985.         return -1;

  986.     }

  987. 

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

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

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

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

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

  993. 

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

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

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

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

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

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

  1000.     v->tfcntrflag = get_bits1(gb);

  1001.     v->finterpflag = get_bits1(gb);

  1002.     skip_bits1(gb); // reserved

  1003. 

  1004.     v->s.h_edge_pos = v->s.avctx->coded_width;

  1005.     v->s.v_edge_pos = v->s.avctx->coded_height;

  1006. 

  1007.     av_log(v->s.avctx, AV_LOG_DEBUG,

  1008.                "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"

  1009.                "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"

  1010.                "TFCTRflag=%i, FINTERPflag=%i\n",

  1011.                v->level, v->frmrtq_postproc, v->bitrtq_postproc,

  1012.                v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,

  1013.                v->tfcntrflag, v->finterpflag

  1014.                );

  1015. 

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

  1017.     if(v->psf) { //PsF, 6.1.13

  1018.         av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");

  1019.         return -1;

  1020.     }

  1021.     v->s.max_b_frames = v->s.avctx->max_b_frames = 7;

  1022.     if(get_bits1(gb)) { //Display Info - decoding is not affected by it

  1023.         int w, h, ar = 0;

  1024.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");

  1025.         v->s.avctx->coded_width  = w = get_bits(gb, 14) + 1;

  1026.         v->s.avctx->coded_height = h = get_bits(gb, 14) + 1;

  1027.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);

  1028.         if(get_bits1(gb))

  1029.             ar = get_bits(gb, 4);

  1030.         if(ar && ar < 14){

  1031.             v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];

  1032.         }else if(ar == 15){

  1033.             w = get_bits(gb, 8);

  1034.             h = get_bits(gb, 8);

  1035.             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};

  1036.         }

  1037.         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);

  1038. 

  1039.         if(get_bits1(gb)){ //framerate stuff

  1040.             if(get_bits1(gb)) {

  1041.                 v->s.avctx->time_base.num = 32;

  1042.                 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;

  1043.             } else {

  1044.                 int nr, dr;

  1045.                 nr = get_bits(gb, 8);

  1046.                 dr = get_bits(gb, 4);

  1047.                 if(nr && nr < 8 && dr && dr < 3){

  1048.                     v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];

  1049.                     v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;

  1050.                 }

  1051.             }

  1052.         }

  1053. 

  1054.         if(get_bits1(gb)){

  1055.             v->color_prim = get_bits(gb, 8);

  1056.             v->transfer_char = get_bits(gb, 8);

  1057.             v->matrix_coef = get_bits(gb, 8);

  1058.         }

  1059.     }

  1060. 

  1061.     v->hrd_param_flag = get_bits1(gb);

  1062.     if(v->hrd_param_flag) {

  1063.         int i;

  1064.         v->hrd_num_leaky_buckets = get_bits(gb, 5);

  1065.         skip_bits(gb, 4); //bitrate exponent

  1066.         skip_bits(gb, 4); //buffer size exponent

  1067.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1068.             skip_bits(gb, 16); //hrd_rate[n]

  1069.             skip_bits(gb, 16); //hrd_buffer[n]

  1070.         }

  1071.     }

  1072.     return 0;

  1073. }

  1074. 

  1075. static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)

  1076. {

  1077.     VC1Context *v = avctx->priv_data;

  1078.     int i;

  1079. 

  1080.     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));

  1081.     v->broken_link = get_bits1(gb);

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

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

  1084.     v->refdist_flag = get_bits1(gb);

  1085.     v->s.loop_filter = get_bits1(gb);

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

  1087.     v->extended_mv = get_bits1(gb);

  1088.     v->dquant = get_bits(gb, 2);

  1089.     v->vstransform = get_bits1(gb);

  1090.     v->overlap = get_bits1(gb);

  1091.     v->quantizer_mode = get_bits(gb, 2);

  1092. 

  1093.     if(v->hrd_param_flag){

  1094.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1095.             skip_bits(gb, 8); //hrd_full[n]

  1096.         }

  1097.     }

  1098. 

  1099.     if(get_bits1(gb)){

  1100.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1101.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1102.     }

  1103.     if(v->extended_mv)

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

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

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

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

  1108.     }

  1109.     if((v->range_mapuv_flag = get_bits1(gb))) {

  1110.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1111.         v->range_mapuv = get_bits(gb, 3);

  1112.     }

  1113. 

  1114.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1115.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1116.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1117.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1118.         v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,

  1119.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1120. 

  1121.     return 0;

  1122. }

  1123. 

  1124. static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1125. {

  1126.     int pqindex, lowquant, status;

  1127. 

  1128.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1129.     skip_bits(gb, 2); //framecnt unused

  1130.     v->rangeredfrm = 0;

  1131.     if (v->rangered) v->rangeredfrm = get_bits1(gb);

  1132.     v->s.pict_type = get_bits1(gb);

  1133.     if (v->s.avctx->max_b_frames) {

  1134.         if (!v->s.pict_type) {

  1135.             if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;

  1136.             else v->s.pict_type = FF_B_TYPE;

  1137.         } else v->s.pict_type = FF_P_TYPE;

  1138.     } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;

  1139. 

  1140.     v->bi_type = 0;

  1141.     if(v->s.pict_type == FF_B_TYPE) {

  1142.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1143.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1144.         if(v->bfraction == 0) {

  1145.             v->s.pict_type = FF_BI_TYPE;

  1146.         }

  1147.     }

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

  1149.         skip_bits(gb, 7); // skip buffer fullness

  1150. 

  1151.     /* calculate RND */

  1152.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1153.         v->rnd = 1;

  1154.     if(v->s.pict_type == FF_P_TYPE)

  1155.         v->rnd ^= 1;

  1156. 

  1157.     /* Quantizer stuff */

  1158.     pqindex = get_bits(gb, 5);

  1159.     if(!pqindex) return -1;

  1160.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1161.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1162.     else

  1163.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1164. 

  1165.     v->pquantizer = 1;

  1166.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1167.         v->pquantizer = pqindex < 9;

  1168.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1169.         v->pquantizer = 0;

  1170.     v->pqindex = pqindex;

  1171.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1172.     else v->halfpq = 0;

  1173.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1174.         v->pquantizer = get_bits1(gb);

  1175.     v->dquantfrm = 0;

  1176.     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);

  1177.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1178.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1179.     v->range_x = 1 << (v->k_x - 1);

  1180.     v->range_y = 1 << (v->k_y - 1);

  1181.     if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);

  1182. 

  1183.     if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){

  1184.         v->x8_type = get_bits1(gb);

  1185.     }else v->x8_type = 0;

  1186. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1187. //        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1188. 

  1189.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1190. 

  1191.     switch(v->s.pict_type) {

  1192.     case FF_P_TYPE:

  1193.         if (v->pq < 5) v->tt_index = 0;

  1194.         else if(v->pq < 13) v->tt_index = 1;

  1195.         else v->tt_index = 2;

  1196. 

  1197.         lowquant = (v->pq > 12) ? 0 : 1;

  1198.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1199.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1200.         {

  1201.             int scale, shift, i;

  1202.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1203.             v->lumscale = get_bits(gb, 6);

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

  1205.             v->use_ic = 1;

  1206.             /* fill lookup tables for intensity compensation */

  1207.             if(!v->lumscale) {

  1208.                 scale = -64;

  1209.                 shift = (255 - v->lumshift * 2) << 6;

  1210.                 if(v->lumshift > 31)

  1211.                     shift += 128 << 6;

  1212.             } else {

  1213.                 scale = v->lumscale + 32;

  1214.                 if(v->lumshift > 31)

  1215.                     shift = (v->lumshift - 64) << 6;

  1216.                 else

  1217.                     shift = v->lumshift << 6;

  1218.             }

  1219.             for(i = 0; i < 256; i++) {

  1220.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1221.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1222.             }

  1223.         }

  1224.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1225.             v->s.quarter_sample = 0;

  1226.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1227.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1228.                 v->s.quarter_sample = 0;

  1229.             else

  1230.                 v->s.quarter_sample = 1;

  1231.         } else

  1232.             v->s.quarter_sample = 1;

  1233.         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));

  1234. 

  1235.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1236.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1237.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1238.         {

  1239.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1240.             if (status < 0) return -1;

  1241.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1242.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1243.         } else {

  1244.             v->mv_type_is_raw = 0;

  1245.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1246.         }

  1247.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1248.         if (status < 0) return -1;

  1249.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1250.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1251. 

  1252.         /* Hopefully this is correct for P frames */

  1253.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1254.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1255. 

  1256.         if (v->dquant)

  1257.         {

  1258.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1259.             vop_dquant_decoding(v);

  1260.         }

  1261. 

  1262.         v->ttfrm = 0; //FIXME Is that so ?

  1263.         if (v->vstransform)

  1264.         {

  1265.             v->ttmbf = get_bits1(gb);

  1266.             if (v->ttmbf)

  1267.             {

  1268.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1269.             }

  1270.         } else {

  1271.             v->ttmbf = 1;

  1272.             v->ttfrm = TT_8X8;

  1273.         }

  1274.         break;

  1275.     case FF_B_TYPE:

  1276.         if (v->pq < 5) v->tt_index = 0;

  1277.         else if(v->pq < 13) v->tt_index = 1;

  1278.         else v->tt_index = 2;

  1279. 

  1280.         lowquant = (v->pq > 12) ? 0 : 1;

  1281.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1282.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1283.         v->s.mspel = v->s.quarter_sample;

  1284. 

  1285.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

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

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

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

  1289.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1290.         if (status < 0) return -1;

  1291.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1292.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1293. 

  1294.         v->s.mv_table_index = get_bits(gb, 2);

  1295.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1296. 

  1297.         if (v->dquant)

  1298.         {

  1299.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1300.             vop_dquant_decoding(v);

  1301.         }

  1302. 

  1303.         v->ttfrm = 0;

  1304.         if (v->vstransform)

  1305.         {

  1306.             v->ttmbf = get_bits1(gb);

  1307.             if (v->ttmbf)

  1308.             {

  1309.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1310.             }

  1311.         } else {

  1312.             v->ttmbf = 1;

  1313.             v->ttfrm = TT_8X8;

  1314.         }

  1315.         break;

  1316.     }

  1317. 

  1318.     if(!v->x8_type)

  1319.     {

  1320.         /* AC Syntax */

  1321.         v->c_ac_table_index = decode012(gb);

  1322.         if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1323.         {

  1324.             v->y_ac_table_index = decode012(gb);

  1325.         }

  1326.         /* DC Syntax */

  1327.         v->s.dc_table_index = get_bits1(gb);

  1328.     }

  1329. 

  1330.     if(v->s.pict_type == FF_BI_TYPE) {

  1331.         v->s.pict_type = FF_B_TYPE;

  1332.         v->bi_type = 1;

  1333.     }

  1334.     return 0;

  1335. }

  1336. 

  1337. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1338. {

  1339.     int pqindex, lowquant;

  1340.     int status;

  1341. 

  1342.     v->p_frame_skipped = 0;

  1343. 

  1344.     if(v->interlace){

  1345.         v->fcm = decode012(gb);

  1346.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1347.     }

  1348.     switch(get_unary(gb, 0, 4)) {

  1349.     case 0:

  1350.         v->s.pict_type = FF_P_TYPE;

  1351.         break;

  1352.     case 1:

  1353.         v->s.pict_type = FF_B_TYPE;

  1354.         break;

  1355.     case 2:

  1356.         v->s.pict_type = FF_I_TYPE;

  1357.         break;

  1358.     case 3:

  1359.         v->s.pict_type = FF_BI_TYPE;

  1360.         break;

  1361.     case 4:

  1362.         v->s.pict_type = FF_P_TYPE; // skipped pic

  1363.         v->p_frame_skipped = 1;

  1364.         return 0;

  1365.     }

  1366.     if(v->tfcntrflag)

  1367.         skip_bits(gb, 8);

  1368.     if(v->broadcast) {

  1369.         if(!v->interlace || v->psf) {

  1370.             v->rptfrm = get_bits(gb, 2);

  1371.         } else {

  1372.             v->tff = get_bits1(gb);

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

  1374.         }

  1375.     }

  1376.     if(v->panscanflag) {

  1377.         //...

  1378.     }

  1379.     v->rnd = get_bits1(gb);

  1380.     if(v->interlace)

  1381.         v->uvsamp = get_bits1(gb);

  1382.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1383.     if(v->s.pict_type == FF_B_TYPE) {

  1384.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1385.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1386.         if(v->bfraction == 0) {

  1387.             v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */

  1388.         }

  1389.     }

  1390.     pqindex = get_bits(gb, 5);

  1391.     if(!pqindex) return -1;

  1392.     v->pqindex = pqindex;

  1393.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1394.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1395.     else

  1396.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1397. 

  1398.     v->pquantizer = 1;

  1399.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1400.         v->pquantizer = pqindex < 9;

  1401.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1402.         v->pquantizer = 0;

  1403.     v->pqindex = pqindex;

  1404.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1405.     else v->halfpq = 0;

  1406.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1407.         v->pquantizer = get_bits1(gb);

  1408.     if(v->postprocflag)

  1409.         v->postproc = get_bits(gb, 2);

  1410. 

  1411.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1412. 

  1413.     switch(v->s.pict_type) {

  1414.     case FF_I_TYPE:

  1415.     case FF_BI_TYPE:

  1416.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1417.         if (status < 0) return -1;

  1418.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1419.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1420.         v->condover = CONDOVER_NONE;

  1421.         if(v->overlap && v->pq <= 8) {

  1422.             v->condover = decode012(gb);

  1423.             if(v->condover == CONDOVER_SELECT) {

  1424.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1425.                 if (status < 0) return -1;

  1426.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1427.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1428.             }

  1429.         }

  1430.         break;

  1431.     case FF_P_TYPE:

  1432.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1433.         else v->mvrange = 0;

  1434.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1435.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1436.         v->range_x = 1 << (v->k_x - 1);

  1437.         v->range_y = 1 << (v->k_y - 1);

  1438. 

  1439.         if (v->pq < 5) v->tt_index = 0;

  1440.         else if(v->pq < 13) v->tt_index = 1;

  1441.         else v->tt_index = 2;

  1442. 

  1443.         lowquant = (v->pq > 12) ? 0 : 1;

  1444.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1445.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1446.         {

  1447.             int scale, shift, i;

  1448.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1449.             v->lumscale = get_bits(gb, 6);

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

  1451.             /* fill lookup tables for intensity compensation */

  1452.             if(!v->lumscale) {

  1453.                 scale = -64;

  1454.                 shift = (255 - v->lumshift * 2) << 6;

  1455.                 if(v->lumshift > 31)

  1456.                     shift += 128 << 6;

  1457.             } else {

  1458.                 scale = v->lumscale + 32;

  1459.                 if(v->lumshift > 31)

  1460.                     shift = (v->lumshift - 64) << 6;

  1461.                 else

  1462.                     shift = v->lumshift << 6;

  1463.             }

  1464.             for(i = 0; i < 256; i++) {

  1465.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1466.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1467.             }

  1468.             v->use_ic = 1;

  1469.         }

  1470.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1471.             v->s.quarter_sample = 0;

  1472.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1473.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1474.                 v->s.quarter_sample = 0;

  1475.             else

  1476.                 v->s.quarter_sample = 1;

  1477.         } else

  1478.             v->s.quarter_sample = 1;

  1479.         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));

  1480. 

  1481.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1482.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1483.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1484.         {

  1485.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1486.             if (status < 0) return -1;

  1487.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1488.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1489.         } else {

  1490.             v->mv_type_is_raw = 0;

  1491.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1492.         }

  1493.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1494.         if (status < 0) return -1;

  1495.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1496.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1497. 

  1498.         /* Hopefully this is correct for P frames */

  1499.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1500.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1501.         if (v->dquant)

  1502.         {

  1503.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1504.             vop_dquant_decoding(v);

  1505.         }

  1506. 

  1507.         v->ttfrm = 0; //FIXME Is that so ?

  1508.         if (v->vstransform)

  1509.         {

  1510.             v->ttmbf = get_bits1(gb);

  1511.             if (v->ttmbf)

  1512.             {

  1513.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1514.             }

  1515.         } else {

  1516.             v->ttmbf = 1;

  1517.             v->ttfrm = TT_8X8;

  1518.         }

  1519.         break;

  1520.     case FF_B_TYPE:

  1521.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1522.         else v->mvrange = 0;

  1523.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1524.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1525.         v->range_x = 1 << (v->k_x - 1);

  1526.         v->range_y = 1 << (v->k_y - 1);

  1527. 

  1528.         if (v->pq < 5) v->tt_index = 0;

  1529.         else if(v->pq < 13) v->tt_index = 1;

  1530.         else v->tt_index = 2;

  1531. 

  1532.         lowquant = (v->pq > 12) ? 0 : 1;

  1533.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1534.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1535.         v->s.mspel = v->s.quarter_sample;

  1536. 

  1537.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

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

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

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

  1541.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1542.         if (status < 0) return -1;

  1543.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1544.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1545. 

  1546.         v->s.mv_table_index = get_bits(gb, 2);

  1547.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1548. 

  1549.         if (v->dquant)

  1550.         {

  1551.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1552.             vop_dquant_decoding(v);

  1553.         }

  1554. 

  1555.         v->ttfrm = 0;

  1556.         if (v->vstransform)

  1557.         {

  1558.             v->ttmbf = get_bits1(gb);

  1559.             if (v->ttmbf)

  1560.             {

  1561.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1562.             }

  1563.         } else {

  1564.             v->ttmbf = 1;

  1565.             v->ttfrm = TT_8X8;

  1566.         }

  1567.         break;

  1568.     }

  1569. 

  1570.     /* AC Syntax */

  1571.     v->c_ac_table_index = decode012(gb);

  1572.     if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1573.     {

  1574.         v->y_ac_table_index = decode012(gb);

  1575.     }

  1576.     /* DC Syntax */

  1577.     v->s.dc_table_index = get_bits1(gb);

  1578.     if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {

  1579.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1580.         vop_dquant_decoding(v);

  1581.     }

  1582. 

  1583.     v->bi_type = 0;

  1584.     if(v->s.pict_type == FF_BI_TYPE) {

  1585.         v->s.pict_type = FF_B_TYPE;

  1586.         v->bi_type = 1;

  1587.     }

  1588.     return 0;

  1589. }

  1590. 

  1591. /***********************************************************************/

  1592. /**

  1593.  * @defgroup vc1block VC-1 Block-level functions

  1594.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1595.  * @{

  1596.  */

  1597. 

  1598. /**

  1599.  * @def GET_MQUANT

  1600.  * @brief Get macroblock-level quantizer scale

  1601.  */

  1602. #define GET_MQUANT()                                           \

  1603.   if (v->dquantfrm)                                            \

  1604.   {                                                            \

  1605.     int edges = 0;                                             \

  1606.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1607.     {                                                          \

  1608.       if (v->dqbilevel)                                        \

  1609.       {                                                        \

  1610.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1611.       }                                                        \

  1612.       else                                                     \

  1613.       {                                                        \

  1614.         mqdiff = get_bits(gb, 3);                              \

  1615.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1616.         else mquant = get_bits(gb, 5);                         \

  1617.       }                                                        \

  1618.     }                                                          \

  1619.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1620.         edges = 1 << v->dqsbedge;                              \

  1621.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1622.         edges = (3 << v->dqsbedge) % 15;                       \

  1623.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1624.         edges = 15;                                            \

  1625.     if((edges&1) && !s->mb_x)                                  \

  1626.         mquant = v->altpq;                                     \

  1627.     if((edges&2) && s->first_slice_line)                       \

  1628.         mquant = v->altpq;                                     \

  1629.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1630.         mquant = v->altpq;                                     \

  1631.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1632.         mquant = v->altpq;                                     \

  1633.   }

  1634. 

  1635. /**

  1636.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1637.  * @brief Get MV differentials

  1638.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1639.  * @param _dmv_x Horizontal differential for decoded MV

  1640.  * @param _dmv_y Vertical differential for decoded MV

  1641.  */

  1642. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1643.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1644.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1645.   if (index > 36)                                                   \

  1646.   {                                                                 \

  1647.     mb_has_coeffs = 1;                                              \

  1648.     index -= 37;                                                    \

  1649.   }                                                                 \

  1650.   else mb_has_coeffs = 0;                                           \

  1651.   s->mb_intra = 0;                                                  \

  1652.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1653.   else if (index == 35)                                             \

  1654.   {                                                                 \

  1655.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

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

  1657.   }                                                                 \

  1658.   else if (index == 36)                                             \

  1659.   {                                                                 \

  1660.     _dmv_x = 0;                                                     \

  1661.     _dmv_y = 0;                                                     \

  1662.     s->mb_intra = 1;                                                \

  1663.   }                                                                 \

  1664.   else                                                              \

  1665.   {                                                                 \

  1666.     index1 = index%6;                                               \

  1667.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1668.     else                                   val = 0;                 \

  1669.     if(size_table[index1] - val > 0)                                \

  1670.         val = get_bits(gb, size_table[index1] - val);               \

  1671.     else                                   val = 0;                 \

  1672.     sign = 0 - (val&1);                                             \

  1673.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1674.                                                                     \

  1675.     index1 = index/6;                                               \

  1676.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1677.     else                                   val = 0;                 \

  1678.     if(size_table[index1] - val > 0)                                \

  1679.         val = get_bits(gb, size_table[index1] - val);               \

  1680.     else                                   val = 0;                 \

  1681.     sign = 0 - (val&1);                                             \

  1682.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1683.   }

  1684. 

  1685. /** Predict and set motion vector

  1686.  */

  1687. 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)

  1688. {

  1689.     int xy, wrap, off = 0;

  1690.     int16_t *A, *B, *C;

  1691.     int px, py;

  1692.     int sum;

  1693. 

  1694.     /* scale MV difference to be quad-pel */

  1695.     dmv_x <<= 1 - s->quarter_sample;

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

  1697. 

  1698.     wrap = s->b8_stride;

  1699.     xy = s->block_index[n];

  1700. 

  1701.     if(s->mb_intra){

  1702.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

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

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

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

  1706.         if(mv1) { /* duplicate motion data for 1-MV block */

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

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

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

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

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

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

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

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

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

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

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

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

  1719.         }

  1720.         return;

  1721.     }

  1722. 

  1723.     C = s->current_picture.motion_val[0][xy - 1];

  1724.     A = s->current_picture.motion_val[0][xy - wrap];

  1725.     if(mv1)

  1726.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1727.     else {

  1728.         //in 4-MV mode different blocks have different B predictor position

  1729.         switch(n){

  1730.         case 0:

  1731.             off = (s->mb_x > 0) ? -1 : 1;

  1732.             break;

  1733.         case 1:

  1734.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1735.             break;

  1736.         case 2:

  1737.             off = 1;

  1738.             break;

  1739.         case 3:

  1740.             off = -1;

  1741.         }

  1742.     }

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

  1744. 

  1745.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1746.         if(s->mb_width == 1) {

  1747.             px = A[0];

  1748.             py = A[1];

  1749.         } else {

  1750.             px = mid_pred(A[0], B[0], C[0]);

  1751.             py = mid_pred(A[1], B[1], C[1]);

  1752.         }

  1753.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1754.         px = C[0];

  1755.         py = C[1];

  1756.     } else {

  1757.         px = py = 0;

  1758.     }

  1759.     /* Pullback MV as specified in 8.3.5.3.4 */

  1760.     {

  1761.         int qx, qy, X, Y;

  1762.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1763.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1764.         X = (s->mb_width << 6) - 4;

  1765.         Y = (s->mb_height << 6) - 4;

  1766.         if(mv1) {

  1767.             if(qx + px < -60) px = -60 - qx;

  1768.             if(qy + py < -60) py = -60 - qy;

  1769.         } else {

  1770.             if(qx + px < -28) px = -28 - qx;

  1771.             if(qy + py < -28) py = -28 - qy;

  1772.         }

  1773.         if(qx + px > X) px = X - qx;

  1774.         if(qy + py > Y) py = Y - qy;

  1775.     }

  1776.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1777.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1778.         if(is_intra[xy - wrap])

  1779.             sum = FFABS(px) + FFABS(py);

  1780.         else

  1781.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1782.         if(sum > 32) {

  1783.             if(get_bits1(&s->gb)) {

  1784.                 px = A[0];

  1785.                 py = A[1];

  1786.             } else {

  1787.                 px = C[0];

  1788.                 py = C[1];

  1789.             }

  1790.         } else {

  1791.             if(is_intra[xy - 1])

  1792.                 sum = FFABS(px) + FFABS(py);

  1793.             else

  1794.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1795.             if(sum > 32) {

  1796.                 if(get_bits1(&s->gb)) {

  1797.                     px = A[0];

  1798.                     py = A[1];

  1799.                 } else {

  1800.                     px = C[0];

  1801.                     py = C[1];

  1802.                 }

  1803.             }

  1804.         }

  1805.     }

  1806.     /* store MV using signed modulus of MV range defined in 4.11 */

  1807.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1808.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1809.     if(mv1) { /* duplicate motion data for 1-MV block */

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

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

  1812.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1813.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1814.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1815.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1816.     }

  1817. }

  1818. 

  1819. /** Motion compensation for direct or interpolated blocks in B-frames

  1820.  */

  1821. static void vc1_interp_mc(VC1Context *v)

  1822. {

  1823.     MpegEncContext *s = &v->s;

  1824.     DSPContext *dsp = &v->s.dsp;

  1825.     uint8_t *srcY, *srcU, *srcV;

  1826.     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1827. 

  1828.     if(!v->s.next_picture.data[0])return;

  1829. 

  1830.     mx = s->mv[1][0][0];

  1831.     my = s->mv[1][0][1];

  1832.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1833.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1834.     if(v->fastuvmc) {

  1835.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1836.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1837.     }

  1838.     srcY = s->next_picture.data[0];

  1839.     srcU = s->next_picture.data[1];

  1840.     srcV = s->next_picture.data[2];

  1841. 

  1842.     src_x = s->mb_x * 16 + (mx >> 2);

  1843.     src_y = s->mb_y * 16 + (my >> 2);

  1844.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1845.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1846. 

  1847.     if(v->profile != PROFILE_ADVANCED){

  1848.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1849.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1850.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1851.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1852.     }else{

  1853.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1854.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1855.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1856.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1857.     }

  1858. 

  1859.     srcY += src_y * s->linesize + src_x;

  1860.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1861.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1862. 

  1863.     /* for grayscale we should not try to read from unknown area */

  1864.     if(s->flags & CODEC_FLAG_GRAY) {

  1865.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1866.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1867.     }

  1868. 

  1869.     if(v->rangeredfrm

  1870.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  1871.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  1872.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1873. 

  1874.         srcY -= s->mspel * (1 + s->linesize);

  1875.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1876.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1877.         srcY = s->edge_emu_buffer;

  1878.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1879.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1880.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1881.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1882.         srcU = uvbuf;

  1883.         srcV = uvbuf + 16;

  1884.         /* if we deal with range reduction we need to scale source blocks */

  1885.         if(v->rangeredfrm) {

  1886.             int i, j;

  1887.             uint8_t *src, *src2;

  1888. 

  1889.             src = srcY;

  1890.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1891.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1892.                 src += s->linesize;

  1893.             }

  1894.             src = srcU; src2 = srcV;

  1895.             for(j = 0; j < 9; j++) {

  1896.                 for(i = 0; i < 9; i++) {

  1897.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1898.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1899.                 }

  1900.                 src += s->uvlinesize;

  1901.                 src2 += s->uvlinesize;

  1902.             }

  1903.         }

  1904.         srcY += s->mspel * (1 + s->linesize);

  1905.     }

  1906. 

  1907.     if(s->mspel) {

  1908.         dxy = ((my & 3) << 2) | (mx & 3);

  1909.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  1910.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);

  1911.         srcY += s->linesize * 8;

  1912.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  1913.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  1914.     } else { // hpel mc

  1915.         dxy = (my & 2) | ((mx & 2) >> 1);

  1916. 

  1917.         if(!v->rnd)

  1918.             dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1919.         else

  1920.             dsp->avg_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1921.     }

  1922. 

  1923.     if(s->flags & CODEC_FLAG_GRAY) return;

  1924.     /* Chroma MC always uses qpel blilinear */

  1925.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  1926.     uvmx = (uvmx&3)<<1;

  1927.     uvmy = (uvmy&3)<<1;

  1928.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1929.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1930. }

  1931. 

  1932. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1933. {

  1934.     int n = bfrac;

  1935. 

  1936. #if B_FRACTION_DEN==256

  1937.     if(inv)

  1938.         n -= 256;

  1939.     if(!qs)

  1940.         return 2 * ((value * n + 255) >> 9);

  1941.     return (value * n + 128) >> 8;

  1942. #else

  1943.     if(inv)

  1944.         n -= B_FRACTION_DEN;

  1945.     if(!qs)

  1946.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1947.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1948. #endif

  1949. }

  1950. 

  1951. /** Reconstruct motion vector for B-frame and do motion compensation

  1952.  */

  1953. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1954. {

  1955.     if(v->use_ic) {

  1956.         v->mv_mode2 = v->mv_mode;

  1957.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1958.     }

  1959.     if(direct) {

  1960.         vc1_mc_1mv(v, 0);

  1961.         vc1_interp_mc(v);

  1962.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1963.         return;

  1964.     }

  1965.     if(mode == BMV_TYPE_INTERPOLATED) {

  1966.         vc1_mc_1mv(v, 0);

  1967.         vc1_interp_mc(v);

  1968.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1969.         return;

  1970.     }

  1971. 

  1972.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1973.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1974.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1975. }

  1976. 

  1977. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1978. {

  1979.     MpegEncContext *s = &v->s;

  1980.     int xy, wrap, off = 0;

  1981.     int16_t *A, *B, *C;

  1982.     int px, py;

  1983.     int sum;

  1984.     int r_x, r_y;

  1985.     const uint8_t *is_intra = v->mb_type[0];

  1986. 

  1987.     r_x = v->range_x;

  1988.     r_y = v->range_y;

  1989.     /* scale MV difference to be quad-pel */

  1990.     dmv_x[0] <<= 1 - s->quarter_sample;

  1991.     dmv_y[0] <<= 1 - s->quarter_sample;

  1992.     dmv_x[1] <<= 1 - s->quarter_sample;

  1993.     dmv_y[1] <<= 1 - s->quarter_sample;

  1994. 

  1995.     wrap = s->b8_stride;

  1996.     xy = s->block_index[0];

  1997. 

  1998.     if(s->mb_intra) {

  1999.         s->current_picture.motion_val[0][xy][0] =

  2000.         s->current_picture.motion_val[0][xy][1] =

  2001.         s->current_picture.motion_val[1][xy][0] =

  2002.         s->current_picture.motion_val[1][xy][1] = 0;

  2003.         return;

  2004.     }

  2005.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  2006.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  2007.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  2008.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  2009. 

  2010.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  2011.     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));

  2012.     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));

  2013.     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));

  2014.     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));

  2015.     if(direct) {

  2016.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2017.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2018.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2019.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2020.         return;

  2021.     }

  2022. 

  2023.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2024.         C = s->current_picture.motion_val[0][xy - 2];

  2025.         A = s->current_picture.motion_val[0][xy - wrap*2];

  2026.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2027.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  2028. 

  2029.         if(!s->mb_x) C[0] = C[1] = 0;

  2030.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2031.             if(s->mb_width == 1) {

  2032.                 px = A[0];

  2033.                 py = A[1];

  2034.             } else {

  2035.                 px = mid_pred(A[0], B[0], C[0]);

  2036.                 py = mid_pred(A[1], B[1], C[1]);

  2037.             }

  2038.         } else if(s->mb_x) { // predictor C is not out of bounds

  2039.             px = C[0];

  2040.             py = C[1];

  2041.         } else {

  2042.             px = py = 0;

  2043.         }

  2044.         /* Pullback MV as specified in 8.3.5.3.4 */

  2045.         {

  2046.             int qx, qy, X, Y;

  2047.             if(v->profile < PROFILE_ADVANCED) {

  2048.                 qx = (s->mb_x << 5);

  2049.                 qy = (s->mb_y << 5);

  2050.                 X = (s->mb_width << 5) - 4;

  2051.                 Y = (s->mb_height << 5) - 4;

  2052.                 if(qx + px < -28) px = -28 - qx;

  2053.                 if(qy + py < -28) py = -28 - qy;

  2054.                 if(qx + px > X) px = X - qx;

  2055.                 if(qy + py > Y) py = Y - qy;

  2056.             } else {

  2057.                 qx = (s->mb_x << 6);

  2058.                 qy = (s->mb_y << 6);

  2059.                 X = (s->mb_width << 6) - 4;

  2060.                 Y = (s->mb_height << 6) - 4;

  2061.                 if(qx + px < -60) px = -60 - qx;

  2062.                 if(qy + py < -60) py = -60 - qy;

  2063.                 if(qx + px > X) px = X - qx;

  2064.                 if(qy + py > Y) py = Y - qy;

  2065.             }

  2066.         }

  2067.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2068.         if(0 && !s->first_slice_line && s->mb_x) {

  2069.             if(is_intra[xy - wrap])

  2070.                 sum = FFABS(px) + FFABS(py);

  2071.             else

  2072.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2073.             if(sum > 32) {

  2074.                 if(get_bits1(&s->gb)) {

  2075.                     px = A[0];

  2076.                     py = A[1];

  2077.                 } else {

  2078.                     px = C[0];

  2079.                     py = C[1];

  2080.                 }

  2081.             } else {

  2082.                 if(is_intra[xy - 2])

  2083.                     sum = FFABS(px) + FFABS(py);

  2084.                 else

  2085.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2086.                 if(sum > 32) {

  2087.                     if(get_bits1(&s->gb)) {

  2088.                         px = A[0];

  2089.                         py = A[1];

  2090.                     } else {

  2091.                         px = C[0];

  2092.                         py = C[1];

  2093.                     }

  2094.                 }

  2095.             }

  2096.         }

  2097.         /* store MV using signed modulus of MV range defined in 4.11 */

  2098.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2099.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2100.     }

  2101.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2102.         C = s->current_picture.motion_val[1][xy - 2];

  2103.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2104.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2105.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2106. 

  2107.         if(!s->mb_x) C[0] = C[1] = 0;

  2108.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2109.             if(s->mb_width == 1) {

  2110.                 px = A[0];

  2111.                 py = A[1];

  2112.             } else {

  2113.                 px = mid_pred(A[0], B[0], C[0]);

  2114.                 py = mid_pred(A[1], B[1], C[1]);

  2115.             }

  2116.         } else if(s->mb_x) { // predictor C is not out of bounds

  2117.             px = C[0];

  2118.             py = C[1];

  2119.         } else {

  2120.             px = py = 0;

  2121.         }

  2122.         /* Pullback MV as specified in 8.3.5.3.4 */

  2123.         {

  2124.             int qx, qy, X, Y;

  2125.             if(v->profile < PROFILE_ADVANCED) {

  2126.                 qx = (s->mb_x << 5);

  2127.                 qy = (s->mb_y << 5);

  2128.                 X = (s->mb_width << 5) - 4;

  2129.                 Y = (s->mb_height << 5) - 4;

  2130.                 if(qx + px < -28) px = -28 - qx;

  2131.                 if(qy + py < -28) py = -28 - qy;

  2132.                 if(qx + px > X) px = X - qx;

  2133.                 if(qy + py > Y) py = Y - qy;

  2134.             } else {

  2135.                 qx = (s->mb_x << 6);

  2136.                 qy = (s->mb_y << 6);

  2137.                 X = (s->mb_width << 6) - 4;

  2138.                 Y = (s->mb_height << 6) - 4;

  2139.                 if(qx + px < -60) px = -60 - qx;

  2140.                 if(qy + py < -60) py = -60 - qy;

  2141.                 if(qx + px > X) px = X - qx;

  2142.                 if(qy + py > Y) py = Y - qy;

  2143.             }

  2144.         }

  2145.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2146.         if(0 && !s->first_slice_line && s->mb_x) {

  2147.             if(is_intra[xy - wrap])

  2148.                 sum = FFABS(px) + FFABS(py);

  2149.             else

  2150.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2151.             if(sum > 32) {

  2152.                 if(get_bits1(&s->gb)) {

  2153.                     px = A[0];

  2154.                     py = A[1];

  2155.                 } else {

  2156.                     px = C[0];

  2157.                     py = C[1];

  2158.                 }

  2159.             } else {

  2160.                 if(is_intra[xy - 2])

  2161.                     sum = FFABS(px) + FFABS(py);

  2162.                 else

  2163.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2164.                 if(sum > 32) {

  2165.                     if(get_bits1(&s->gb)) {

  2166.                         px = A[0];

  2167.                         py = A[1];

  2168.                     } else {

  2169.                         px = C[0];

  2170.                         py = C[1];

  2171.                     }

  2172.                 }

  2173.             }

  2174.         }

  2175.         /* store MV using signed modulus of MV range defined in 4.11 */

  2176. 

  2177.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2178.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2179.     }

  2180.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2181.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2182.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2183.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2184. }

  2185. 

  2186. /** Get predicted DC value for I-frames only

  2187.  * prediction dir: left=0, top=1

  2188.  * @param s MpegEncContext

  2189.  * @param overlap flag indicating that overlap filtering is used

  2190.  * @param pq integer part of picture quantizer

  2191.  * @param[in] n block index in the current MB

  2192.  * @param dc_val_ptr Pointer to DC predictor

  2193.  * @param dir_ptr Prediction direction for use in AC prediction

  2194.  */

  2195. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2196.                               int16_t **dc_val_ptr, int *dir_ptr)

  2197. {

  2198.     int a, b, c, wrap, pred, scale;

  2199.     int16_t *dc_val;

  2200.     static const uint16_t dcpred[32] = {

  2201.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2202.          114,  102,   93,   85,   79,   73,   68,   64,

  2203.           60,   57,   54,   51,   49,   47,   45,   43,

  2204.           41,   39,   38,   37,   35,   34,   33

  2205.     };

  2206. 

  2207.     /* find prediction - wmv3_dc_scale always used here in fact */

  2208.     if (n < 4)     scale = s->y_dc_scale;

  2209.     else           scale = s->c_dc_scale;

  2210. 

  2211.     wrap = s->block_wrap[n];

  2212.     dc_val= s->dc_val[0] + s->block_index[n];

  2213. 

  2214.     /* B A

  2215.      * C X

  2216.      */

  2217.     c = dc_val[ - 1];

  2218.     b = dc_val[ - 1 - wrap];

  2219.     a = dc_val[ - wrap];

  2220. 

  2221.     if (pq < 9 || !overlap)

  2222.     {

  2223.         /* Set outer values */

  2224.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2225.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2226.     }

  2227.     else

  2228.     {

  2229.         /* Set outer values */

  2230.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2231.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2232.     }

  2233. 

  2234.     if (abs(a - b) <= abs(b - c)) {

  2235.         pred = c;

  2236.         *dir_ptr = 1;//left

  2237.     } else {

  2238.         pred = a;

  2239.         *dir_ptr = 0;//top

  2240.     }

  2241. 

  2242.     /* update predictor */

  2243.     *dc_val_ptr = &dc_val[0];

  2244.     return pred;

  2245. }

  2246. 

  2247. 

  2248. /** Get predicted DC value

  2249.  * prediction dir: left=0, top=1

  2250.  * @param s MpegEncContext

  2251.  * @param overlap flag indicating that overlap filtering is used

  2252.  * @param pq integer part of picture quantizer

  2253.  * @param[in] n block index in the current MB

  2254.  * @param a_avail flag indicating top block availability

  2255.  * @param c_avail flag indicating left block availability

  2256.  * @param dc_val_ptr Pointer to DC predictor

  2257.  * @param dir_ptr Prediction direction for use in AC prediction

  2258.  */

  2259. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2260.                               int a_avail, int c_avail,

  2261.                               int16_t **dc_val_ptr, int *dir_ptr)

  2262. {

  2263.     int a, b, c, wrap, pred, scale;

  2264.     int16_t *dc_val;

  2265.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2266.     int q1, q2 = 0;

  2267. 

  2268.     /* find prediction - wmv3_dc_scale always used here in fact */

  2269.     if (n < 4)     scale = s->y_dc_scale;

  2270.     else           scale = s->c_dc_scale;

  2271. 

  2272.     wrap = s->block_wrap[n];

  2273.     dc_val= s->dc_val[0] + s->block_index[n];

  2274. 

  2275.     /* B A

  2276.      * C X

  2277.      */

  2278.     c = dc_val[ - 1];

  2279.     b = dc_val[ - 1 - wrap];

  2280.     a = dc_val[ - wrap];

  2281.     /* scale predictors if needed */

  2282.     q1 = s->current_picture.qscale_table[mb_pos];

  2283.     if(c_avail && (n!= 1 && n!=3)) {

  2284.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2285.         if(q2 && q2 != q1)

  2286.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2287.     }

  2288.     if(a_avail && (n!= 2 && n!=3)) {

  2289.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2290.         if(q2 && q2 != q1)

  2291.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2292.     }

  2293.     if(a_avail && c_avail && (n!=3)) {

  2294.         int off = mb_pos;

  2295.         if(n != 1) off--;

  2296.         if(n != 2) off -= s->mb_stride;

  2297.         q2 = s->current_picture.qscale_table[off];

  2298.         if(q2 && q2 != q1)

  2299.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2300.     }

  2301. 

  2302.     if(a_avail && c_avail) {

  2303.         if(abs(a - b) <= abs(b - c)) {

  2304.             pred = c;

  2305.             *dir_ptr = 1;//left

  2306.         } else {

  2307.             pred = a;

  2308.             *dir_ptr = 0;//top

  2309.         }

  2310.     } else if(a_avail) {

  2311.         pred = a;

  2312.         *dir_ptr = 0;//top

  2313.     } else if(c_avail) {

  2314.         pred = c;

  2315.         *dir_ptr = 1;//left

  2316.     } else {

  2317.         pred = 0;

  2318.         *dir_ptr = 1;//left

  2319.     }

  2320. 

  2321.     /* update predictor */

  2322.     *dc_val_ptr = &dc_val[0];

  2323.     return pred;

  2324. }

  2325. 

  2326. /** @} */ // Block group

  2327. 

  2328. /**

  2329.  * @defgroup vc1_std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2330.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2331.  * @{

  2332.  */

  2333. 

  2334. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2335. {

  2336.     int xy, wrap, pred, a, b, c;

  2337. 

  2338.     xy = s->block_index[n];

  2339.     wrap = s->b8_stride;

  2340. 

  2341.     /* B C

  2342.      * A X

  2343.      */

  2344.     a = s->coded_block[xy - 1       ];

  2345.     b = s->coded_block[xy - 1 - wrap];

  2346.     c = s->coded_block[xy     - wrap];

  2347. 

  2348.     if (b == c) {

  2349.         pred = a;

  2350.     } else {

  2351.         pred = c;

  2352.     }

  2353. 

  2354.     /* store value */

  2355.     *coded_block_ptr = &s->coded_block[xy];

  2356. 

  2357.     return pred;

  2358. }

  2359. 

  2360. /**

  2361.  * Decode one AC coefficient

  2362.  * @param v The VC1 context

  2363.  * @param last Last coefficient

  2364.  * @param skip How much zero coefficients to skip

  2365.  * @param value Decoded AC coefficient value

  2366.  * @param codingset set of VLC to decode data

  2367.  * @see 8.1.3.4

  2368.  */

  2369. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2370. {

  2371.     GetBitContext *gb = &v->s.gb;

  2372.     int index, escape, run = 0, level = 0, lst = 0;

  2373. 

  2374.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2375.     if (index != vc1_ac_sizes[codingset] - 1) {

  2376.         run = vc1_index_decode_table[codingset][index][0];

  2377.         level = vc1_index_decode_table[codingset][index][1];

  2378.         lst = index >= vc1_last_decode_table[codingset];

  2379.         if(get_bits1(gb))

  2380.             level = -level;

  2381.     } else {

  2382.         escape = decode210(gb);

  2383.         if (escape != 2) {

  2384.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2385.             run = vc1_index_decode_table[codingset][index][0];

  2386.             level = vc1_index_decode_table[codingset][index][1];

  2387.             lst = index >= vc1_last_decode_table[codingset];

  2388.             if(escape == 0) {

  2389.                 if(lst)

  2390.                     level += vc1_last_delta_level_table[codingset][run];

  2391.                 else

  2392.                     level += vc1_delta_level_table[codingset][run];

  2393.             } else {

  2394.                 if(lst)

  2395.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2396.                 else

  2397.                     run += vc1_delta_run_table[codingset][level] + 1;

  2398.             }

  2399.             if(get_bits1(gb))

  2400.                 level = -level;

  2401.         } else {

  2402.             int sign;

  2403.             lst = get_bits1(gb);

  2404.             if(v->s.esc3_level_length == 0) {

  2405.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2406.                     v->s.esc3_level_length = get_bits(gb, 3);

  2407.                     if(!v->s.esc3_level_length)

  2408.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2409.                 } else { //table 60

  2410.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2411.                 }

  2412.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2413.             }

  2414.             run = get_bits(gb, v->s.esc3_run_length);

  2415.             sign = get_bits1(gb);

  2416.             level = get_bits(gb, v->s.esc3_level_length);

  2417.             if(sign)

  2418.                 level = -level;

  2419.         }

  2420.     }

  2421. 

  2422.     *last = lst;

  2423.     *skip = run;

  2424.     *value = level;

  2425. }

  2426. 

  2427. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2428.  * @param v VC1Context

  2429.  * @param block block to decode

  2430.  * @param[in] n subblock index

  2431.  * @param coded are AC coeffs present or not

  2432.  * @param codingset set of VLC to decode data

  2433.  */

  2434. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2435. {

  2436.     GetBitContext *gb = &v->s.gb;

  2437.     MpegEncContext *s = &v->s;

  2438.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2439.     int run_diff, i;

  2440.     int16_t *dc_val;

  2441.     int16_t *ac_val, *ac_val2;

  2442.     int dcdiff;

  2443. 

  2444.     /* Get DC differential */

  2445.     if (n < 4) {

  2446.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2447.     } else {

  2448.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2449.     }

  2450.     if (dcdiff < 0){

  2451.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2452.         return -1;

  2453.     }

  2454.     if (dcdiff)

  2455.     {

  2456.         if (dcdiff == 119 /* ESC index value */)

  2457.         {

  2458.             /* TODO: Optimize */

  2459.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2460.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2461.             else dcdiff = get_bits(gb, 8);

  2462.         }

  2463.         else

  2464.         {

  2465.             if (v->pq == 1)

  2466.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2467.             else if (v->pq == 2)

  2468.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2469.         }

  2470.         if (get_bits1(gb))

  2471.             dcdiff = -dcdiff;

  2472.     }

  2473. 

  2474.     /* Prediction */

  2475.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2476.     *dc_val = dcdiff;

  2477. 

  2478.     /* Store the quantized DC coeff, used for prediction */

  2479.     if (n < 4) {

  2480.         block[0] = dcdiff * s->y_dc_scale;

  2481.     } else {

  2482.         block[0] = dcdiff * s->c_dc_scale;

  2483.     }

  2484.     /* Skip ? */

  2485.     run_diff = 0;

  2486.     i = 0;

  2487.     if (!coded) {

  2488.         goto not_coded;

  2489.     }

  2490. 

  2491.     //AC Decoding

  2492.     i = 1;

  2493. 

  2494.     {

  2495.         int last = 0, skip, value;

  2496.         const int8_t *zz_table;

  2497.         int scale;

  2498.         int k;

  2499. 

  2500.         scale = v->pq * 2 + v->halfpq;

  2501. 

  2502.         if(v->s.ac_pred) {

  2503.             if(!dc_pred_dir)

  2504.                 zz_table = wmv1_scantable[2];

  2505.             else

  2506.                 zz_table = wmv1_scantable[3];

  2507.         } else

  2508.             zz_table = wmv1_scantable[1];

  2509. 

  2510.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2511.         ac_val2 = ac_val;

  2512.         if(dc_pred_dir) //left

  2513.             ac_val -= 16;

  2514.         else //top

  2515.             ac_val -= 16 * s->block_wrap[n];

  2516. 

  2517.         while (!last) {

  2518.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2519.             i += skip;

  2520.             if(i > 63)

  2521.                 break;

  2522.             block[zz_table[i++]] = value;

  2523.         }

  2524. 

  2525.         /* apply AC prediction if needed */

  2526.         if(s->ac_pred) {

  2527.             if(dc_pred_dir) { //left

  2528.                 for(k = 1; k < 8; k++)

  2529.                     block[k << 3] += ac_val[k];

  2530.             } else { //top

  2531.                 for(k = 1; k < 8; k++)

  2532.                     block[k] += ac_val[k + 8];

  2533.             }

  2534.         }

  2535.         /* save AC coeffs for further prediction */

  2536.         for(k = 1; k < 8; k++) {

  2537.             ac_val2[k] = block[k << 3];

  2538.             ac_val2[k + 8] = block[k];

  2539.         }

  2540. 

  2541.         /* scale AC coeffs */

  2542.         for(k = 1; k < 64; k++)

  2543.             if(block[k]) {

  2544.                 block[k] *= scale;

  2545.                 if(!v->pquantizer)

  2546.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2547.             }

  2548. 

  2549.         if(s->ac_pred) i = 63;

  2550.     }

  2551. 

  2552. not_coded:

  2553.     if(!coded) {

  2554.         int k, scale;

  2555.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2556.         ac_val2 = ac_val;

  2557. 

  2558.         scale = v->pq * 2 + v->halfpq;

  2559.         memset(ac_val2, 0, 16 * 2);

  2560.         if(dc_pred_dir) {//left

  2561.             ac_val -= 16;

  2562.             if(s->ac_pred)

  2563.                 memcpy(ac_val2, ac_val, 8 * 2);

  2564.         } else {//top

  2565.             ac_val -= 16 * s->block_wrap[n];

  2566.             if(s->ac_pred)

  2567.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2568.         }

  2569. 

  2570.         /* apply AC prediction if needed */

  2571.         if(s->ac_pred) {

  2572.             if(dc_pred_dir) { //left

  2573.                 for(k = 1; k < 8; k++) {

  2574.                     block[k << 3] = ac_val[k] * scale;

  2575.                     if(!v->pquantizer && block[k << 3])

  2576.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2577.                 }

  2578.             } else { //top

  2579.                 for(k = 1; k < 8; k++) {

  2580.                     block[k] = ac_val[k + 8] * scale;

  2581.                     if(!v->pquantizer && block[k])

  2582.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2583.                 }

  2584.             }

  2585.             i = 63;

  2586.         }

  2587.     }

  2588.     s->block_last_index[n] = i;

  2589. 

  2590.     return 0;

  2591. }

  2592. 

  2593. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2594.  * @param v VC1Context

  2595.  * @param block block to decode

  2596.  * @param[in] n subblock number

  2597.  * @param coded are AC coeffs present or not

  2598.  * @param codingset set of VLC to decode data

  2599.  * @param mquant quantizer value for this macroblock

  2600.  */

  2601. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2602. {

  2603.     GetBitContext *gb = &v->s.gb;

  2604.     MpegEncContext *s = &v->s;

  2605.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2606.     int run_diff, i;

  2607.     int16_t *dc_val;

  2608.     int16_t *ac_val, *ac_val2;

  2609.     int dcdiff;

  2610.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2611.     int use_pred = s->ac_pred;

  2612.     int scale;

  2613.     int q1, q2 = 0;

  2614.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2615. 

  2616.     /* Get DC differential */

  2617.     if (n < 4) {

  2618.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2619.     } else {

  2620.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2621.     }

  2622.     if (dcdiff < 0){

  2623.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2624.         return -1;

  2625.     }

  2626.     if (dcdiff)

  2627.     {

  2628.         if (dcdiff == 119 /* ESC index value */)

  2629.         {

  2630.             /* TODO: Optimize */

  2631.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2632.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2633.             else dcdiff = get_bits(gb, 8);

  2634.         }

  2635.         else

  2636.         {

  2637.             if (mquant == 1)

  2638.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2639.             else if (mquant == 2)

  2640.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2641.         }

  2642.         if (get_bits1(gb))

  2643.             dcdiff = -dcdiff;

  2644.     }

  2645. 

  2646.     /* Prediction */

  2647.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2648.     *dc_val = dcdiff;

  2649. 

  2650.     /* Store the quantized DC coeff, used for prediction */

  2651.     if (n < 4) {

  2652.         block[0] = dcdiff * s->y_dc_scale;

  2653.     } else {

  2654.         block[0] = dcdiff * s->c_dc_scale;

  2655.     }

  2656.     /* Skip ? */

  2657.     run_diff = 0;

  2658.     i = 0;

  2659. 

  2660.     //AC Decoding

  2661.     i = 1;

  2662. 

  2663.     /* check if AC is needed at all */

  2664.     if(!a_avail && !c_avail) use_pred = 0;

  2665.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2666.     ac_val2 = ac_val;

  2667. 

  2668.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2669. 

  2670.     if(dc_pred_dir) //left

  2671.         ac_val -= 16;

  2672.     else //top

  2673.         ac_val -= 16 * s->block_wrap[n];

  2674. 

  2675.     q1 = s->current_picture.qscale_table[mb_pos];

  2676.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2677.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2678.     if(dc_pred_dir && n==1) q2 = q1;

  2679.     if(!dc_pred_dir && n==2) q2 = q1;

  2680.     if(n==3) q2 = q1;

  2681. 

  2682.     if(coded) {

  2683.         int last = 0, skip, value;

  2684.         const int8_t *zz_table;

  2685.         int k;

  2686. 

  2687.         if(v->s.ac_pred) {

  2688.             if(!dc_pred_dir)

  2689.                 zz_table = wmv1_scantable[2];

  2690.             else

  2691.                 zz_table = wmv1_scantable[3];

  2692.         } else

  2693.             zz_table = wmv1_scantable[1];

  2694. 

  2695.         while (!last) {

  2696.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2697.             i += skip;

  2698.             if(i > 63)

  2699.                 break;

  2700.             block[zz_table[i++]] = value;

  2701.         }

  2702. 

  2703.         /* apply AC prediction if needed */

  2704.         if(use_pred) {

  2705.             /* scale predictors if needed*/

  2706.             if(q2 && q1!=q2) {

  2707.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2708.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2709. 

  2710.                 if(dc_pred_dir) { //left

  2711.                     for(k = 1; k < 8; k++)

  2712.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2713.                 } else { //top

  2714.                     for(k = 1; k < 8; k++)

  2715.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2716.                 }

  2717.             } else {

  2718.                 if(dc_pred_dir) { //left

  2719.                     for(k = 1; k < 8; k++)

  2720.                         block[k << 3] += ac_val[k];

  2721.                 } else { //top

  2722.                     for(k = 1; k < 8; k++)

  2723.                         block[k] += ac_val[k + 8];

  2724.                 }

  2725.             }

  2726.         }

  2727.         /* save AC coeffs for further prediction */

  2728.         for(k = 1; k < 8; k++) {

  2729.             ac_val2[k] = block[k << 3];

  2730.             ac_val2[k + 8] = block[k];

  2731.         }

  2732. 

  2733.         /* scale AC coeffs */

  2734.         for(k = 1; k < 64; k++)

  2735.             if(block[k]) {

  2736.                 block[k] *= scale;

  2737.                 if(!v->pquantizer)

  2738.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2739.             }

  2740. 

  2741.         if(use_pred) i = 63;

  2742.     } else { // no AC coeffs

  2743.         int k;

  2744. 

  2745.         memset(ac_val2, 0, 16 * 2);

  2746.         if(dc_pred_dir) {//left

  2747.             if(use_pred) {

  2748.                 memcpy(ac_val2, ac_val, 8 * 2);

  2749.                 if(q2 && q1!=q2) {

  2750.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2751.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

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

  2753.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2754.                 }

  2755.             }

  2756.         } else {//top

  2757.             if(use_pred) {

  2758.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2759.                 if(q2 && q1!=q2) {

  2760.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2761.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2762.                     for(k = 1; k < 8; k++)

  2763.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2764.                 }

  2765.             }

  2766.         }

  2767. 

  2768.         /* apply AC prediction if needed */

  2769.         if(use_pred) {

  2770.             if(dc_pred_dir) { //left

  2771.                 for(k = 1; k < 8; k++) {

  2772.                     block[k << 3] = ac_val2[k] * scale;

  2773.                     if(!v->pquantizer && block[k << 3])

  2774.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2775.                 }

  2776.             } else { //top

  2777.                 for(k = 1; k < 8; k++) {

  2778.                     block[k] = ac_val2[k + 8] * scale;

  2779.                     if(!v->pquantizer && block[k])

  2780.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2781.                 }

  2782.             }

  2783.             i = 63;

  2784.         }

  2785.     }

  2786.     s->block_last_index[n] = i;

  2787. 

  2788.     return 0;

  2789. }

  2790. 

  2791. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2792.  * @param v VC1Context

  2793.  * @param block block to decode

  2794.  * @param[in] n subblock index

  2795.  * @param coded are AC coeffs present or not

  2796.  * @param mquant block quantizer

  2797.  * @param codingset set of VLC to decode data

  2798.  */

  2799. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2800. {

  2801.     GetBitContext *gb = &v->s.gb;

  2802.     MpegEncContext *s = &v->s;

  2803.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2804.     int run_diff, i;

  2805.     int16_t *dc_val;

  2806.     int16_t *ac_val, *ac_val2;

  2807.     int dcdiff;

  2808.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2809.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2810.     int use_pred = s->ac_pred;

  2811.     int scale;

  2812.     int q1, q2 = 0;

  2813. 

  2814.     /* XXX: Guard against dumb values of mquant */

  2815.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2816. 

  2817.     /* Set DC scale - y and c use the same */

  2818.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2819.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2820. 

  2821.     /* Get DC differential */

  2822.     if (n < 4) {

  2823.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2824.     } else {

  2825.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2826.     }

  2827.     if (dcdiff < 0){

  2828.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2829.         return -1;

  2830.     }

  2831.     if (dcdiff)

  2832.     {

  2833.         if (dcdiff == 119 /* ESC index value */)

  2834.         {

  2835.             /* TODO: Optimize */

  2836.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2837.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2838.             else dcdiff = get_bits(gb, 8);

  2839.         }

  2840.         else

  2841.         {

  2842.             if (mquant == 1)

  2843.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2844.             else if (mquant == 2)

  2845.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2846.         }

  2847.         if (get_bits1(gb))

  2848.             dcdiff = -dcdiff;

  2849.     }

  2850. 

  2851.     /* Prediction */

  2852.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2853.     *dc_val = dcdiff;

  2854. 

  2855.     /* Store the quantized DC coeff, used for prediction */

  2856. 

  2857.     if (n < 4) {

  2858.         block[0] = dcdiff * s->y_dc_scale;

  2859.     } else {

  2860.         block[0] = dcdiff * s->c_dc_scale;

  2861.     }

  2862.     /* Skip ? */

  2863.     run_diff = 0;

  2864.     i = 0;

  2865. 

  2866.     //AC Decoding

  2867.     i = 1;

  2868. 

  2869.     /* check if AC is needed at all and adjust direction if needed */

  2870.     if(!a_avail) dc_pred_dir = 1;

  2871.     if(!c_avail) dc_pred_dir = 0;

  2872.     if(!a_avail && !c_avail) use_pred = 0;

  2873.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2874.     ac_val2 = ac_val;

  2875. 

  2876.     scale = mquant * 2 + v->halfpq;

  2877. 

  2878.     if(dc_pred_dir) //left

  2879.         ac_val -= 16;

  2880.     else //top

  2881.         ac_val -= 16 * s->block_wrap[n];

  2882. 

  2883.     q1 = s->current_picture.qscale_table[mb_pos];

  2884.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2885.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2886.     if(dc_pred_dir && n==1) q2 = q1;

  2887.     if(!dc_pred_dir && n==2) q2 = q1;

  2888.     if(n==3) q2 = q1;

  2889. 

  2890.     if(coded) {

  2891.         int last = 0, skip, value;

  2892.         const int8_t *zz_table;

  2893.         int k;

  2894. 

  2895.         zz_table = wmv1_scantable[0];

  2896. 

  2897.         while (!last) {

  2898.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2899.             i += skip;

  2900.             if(i > 63)

  2901.                 break;

  2902.             block[zz_table[i++]] = value;

  2903.         }

  2904. 

  2905.         /* apply AC prediction if needed */

  2906.         if(use_pred) {

  2907.             /* scale predictors if needed*/

  2908.             if(q2 && q1!=q2) {

  2909.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2910.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2911. 

  2912.                 if(dc_pred_dir) { //left

  2913.                     for(k = 1; k < 8; k++)

  2914.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2915.                 } else { //top

  2916.                     for(k = 1; k < 8; k++)

  2917.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2918.                 }

  2919.             } else {

  2920.                 if(dc_pred_dir) { //left

  2921.                     for(k = 1; k < 8; k++)

  2922.                         block[k << 3] += ac_val[k];

  2923.                 } else { //top

  2924.                     for(k = 1; k < 8; k++)

  2925.                         block[k] += ac_val[k + 8];

  2926.                 }

  2927.             }

  2928.         }

  2929.         /* save AC coeffs for further prediction */

  2930.         for(k = 1; k < 8; k++) {

  2931.             ac_val2[k] = block[k << 3];

  2932.             ac_val2[k + 8] = block[k];

  2933.         }

  2934. 

  2935.         /* scale AC coeffs */

  2936.         for(k = 1; k < 64; k++)

  2937.             if(block[k]) {

  2938.                 block[k] *= scale;

  2939.                 if(!v->pquantizer)

  2940.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2941.             }

  2942. 

  2943.         if(use_pred) i = 63;

  2944.     } else { // no AC coeffs

  2945.         int k;

  2946. 

  2947.         memset(ac_val2, 0, 16 * 2);

  2948.         if(dc_pred_dir) {//left

  2949.             if(use_pred) {

  2950.                 memcpy(ac_val2, ac_val, 8 * 2);

  2951.                 if(q2 && q1!=q2) {

  2952.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2953.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2954.                     for(k = 1; k < 8; k++)

  2955.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2956.                 }

  2957.             }

  2958.         } else {//top

  2959.             if(use_pred) {

  2960.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2961.                 if(q2 && q1!=q2) {

  2962.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2963.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2964.                     for(k = 1; k < 8; k++)

  2965.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2966.                 }

  2967.             }

  2968.         }

  2969. 

  2970.         /* apply AC prediction if needed */

  2971.         if(use_pred) {

  2972.             if(dc_pred_dir) { //left

  2973.                 for(k = 1; k < 8; k++) {

  2974.                     block[k << 3] = ac_val2[k] * scale;

  2975.                     if(!v->pquantizer && block[k << 3])

  2976.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2977.                 }

  2978.             } else { //top

  2979.                 for(k = 1; k < 8; k++) {

  2980.                     block[k] = ac_val2[k + 8] * scale;

  2981.                     if(!v->pquantizer && block[k])

  2982.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2983.                 }

  2984.             }

  2985.             i = 63;

  2986.         }

  2987.     }

  2988.     s->block_last_index[n] = i;

  2989. 

  2990.     return 0;

  2991. }

  2992. 

  2993. /** Decode P block

  2994.  */

  2995. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,

  2996.                               uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left)

  2997. {

  2998.     MpegEncContext *s = &v->s;

  2999.     GetBitContext *gb = &s->gb;

  3000.     int i, j;

  3001.     int subblkpat = 0;

  3002.     int scale, off, idx, last, skip, value;

  3003.     int ttblk = ttmb & 7;

  3004.     int pat = 0;

  3005. 

  3006.     if(ttmb == -1) {

  3007.         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)];

  3008.     }

  3009.     if(ttblk == TT_4X4) {

  3010.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  3011.     }

  3012.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  3013.         subblkpat = decode012(gb);

  3014.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  3015.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  3016.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  3017.     }

  3018.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  3019. 

  3020.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  3021.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  3022.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  3023.         ttblk = TT_8X4;

  3024.     }

  3025.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  3026.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  3027.         ttblk = TT_4X8;

  3028.     }

  3029.     switch(ttblk) {

  3030.     case TT_8X8:

  3031.         pat = 0xF;

  3032.         i = 0;

  3033.         last = 0;

  3034.         while (!last) {

  3035.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3036.             i += skip;

  3037.             if(i > 63)

  3038.                 break;

  3039.             idx = wmv1_scantable[0][i++];

  3040.             block[idx] = value * scale;

  3041.             if(!v->pquantizer)

  3042.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3043.         }

  3044.         if(!skip_block){

  3045.             s->dsp.vc1_inv_trans_8x8(block);

  3046.             s->dsp.add_pixels_clamped(block, dst, linesize);

  3047.             if(apply_filter && cbp_top  & 0xC)

  3048.                 vc1_loop_filter(dst, 1, linesize, 8, mquant);

  3049.             if(apply_filter && cbp_left & 0xA)

  3050.                 vc1_loop_filter(dst, linesize, 1, 8, mquant);

  3051.         }

  3052.         break;

  3053.     case TT_4X4:

  3054.         pat = ~subblkpat & 0xF;

  3055.         for(j = 0; j < 4; j++) {

  3056.             last = subblkpat & (1 << (3 - j));

  3057.             i = 0;

  3058.             off = (j & 1) * 4 + (j & 2) * 16;

  3059.             while (!last) {

  3060.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3061.                 i += skip;

  3062.                 if(i > 15)

  3063.                     break;

  3064.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3065.                 block[idx + off] = value * scale;

  3066.                 if(!v->pquantizer)

  3067.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3068.             }

  3069.             if(!(subblkpat & (1 << (3 - j))) && !skip_block){

  3070.                 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);

  3071.                 if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2)))))

  3072.                     vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, 1, linesize, 4, mquant);

  3073.                 if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1)))))

  3074.                     vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, linesize, 1, 4, mquant);

  3075.             }

  3076.         }

  3077.         break;

  3078.     case TT_8X4:

  3079.         pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF;

  3080.         for(j = 0; j < 2; j++) {

  3081.             last = subblkpat & (1 << (1 - j));

  3082.             i = 0;

  3083.             off = j * 32;

  3084.             while (!last) {

  3085.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3086.                 i += skip;

  3087.                 if(i > 31)

  3088.                     break;

  3089.                 idx = v->zz_8x4[i++]+off;

  3090.                 block[idx] = value * scale;

  3091.                 if(!v->pquantizer)

  3092.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3093.             }

  3094.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3095.                 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);

  3096.                 if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC))

  3097.                     vc1_loop_filter(dst + j*4*linesize, 1, linesize, 8, mquant);

  3098.                 if(apply_filter && cbp_left & (2 << j))

  3099.                     vc1_loop_filter(dst + j*4*linesize, linesize, 1, 4, mquant);

  3100.             }

  3101.         }

  3102.         break;

  3103.     case TT_4X8:

  3104.         pat = ~(subblkpat*5) & 0xF;

  3105.         for(j = 0; j < 2; j++) {

  3106.             last = subblkpat & (1 << (1 - j));

  3107.             i = 0;

  3108.             off = j * 4;

  3109.             while (!last) {

  3110.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3111.                 i += skip;

  3112.                 if(i > 31)

  3113.                     break;

  3114.                 idx = v->zz_4x8[i++]+off;

  3115.                 block[idx] = value * scale;

  3116.                 if(!v->pquantizer)

  3117.                     block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3118.             }

  3119.             if(!(subblkpat & (1 << (1 - j))) && !skip_block){

  3120.                 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3121.                 if(apply_filter && cbp_top & (2 << j))

  3122.                     vc1_loop_filter(dst + j*4, 1, linesize, 4, mquant);

  3123.                 if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA))

  3124.                     vc1_loop_filter(dst + j*4, linesize, 1, 8, mquant);

  3125.             }

  3126.         }

  3127.         break;

  3128.     }

  3129.     return pat;

  3130. }

  3131. 

  3132. /** @} */ // Macroblock group

  3133. 

  3134. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3135. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3136. 

  3137. /** Decode one P-frame MB (in Simple/Main profile)

  3138.  */

  3139. static int vc1_decode_p_mb(VC1Context *v)

  3140. {

  3141.     MpegEncContext *s = &v->s;

  3142.     GetBitContext *gb = &s->gb;

  3143.     int i, j;

  3144.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3145.     int cbp; /* cbp decoding stuff */

  3146.     int mqdiff, mquant; /* MB quantization */

  3147.     int ttmb = v->ttfrm; /* MB Transform type */

  3148. 

  3149.     int mb_has_coeffs = 1; /* last_flag */

  3150.     int dmv_x, dmv_y; /* Differential MV components */

  3151.     int index, index1; /* LUT indexes */

  3152.     int val, sign; /* temp values */

  3153.     int first_block = 1;

  3154.     int dst_idx, off;

  3155.     int skipped, fourmv;

  3156.     int block_cbp = 0, pat;

  3157.     int apply_loop_filter;

  3158. 

  3159.     mquant = v->pq; /* Loosy initialization */

  3160. 

  3161.     if (v->mv_type_is_raw)

  3162.         fourmv = get_bits1(gb);

  3163.     else

  3164.         fourmv = v->mv_type_mb_plane[mb_pos];

  3165.     if (v->skip_is_raw)

  3166.         skipped = get_bits1(gb);

  3167.     else

  3168.         skipped = v->s.mbskip_table[mb_pos];

  3169. 

  3170.     s->dsp.clear_blocks(s->block[0]);

  3171. 

  3172.     apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  3173.     if (!fourmv) /* 1MV mode */

  3174.     {

  3175.         if (!skipped)

  3176.         {

  3177.             GET_MVDATA(dmv_x, dmv_y);

  3178. 

  3179.             if (s->mb_intra) {

  3180.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3181.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3182.             }

  3183.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3184.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3185. 

  3186.             /* FIXME Set DC val for inter block ? */

  3187.             if (s->mb_intra && !mb_has_coeffs)

  3188.             {

  3189.                 GET_MQUANT();

  3190.                 s->ac_pred = get_bits1(gb);

  3191.                 cbp = 0;

  3192.             }

  3193.             else if (mb_has_coeffs)

  3194.             {

  3195.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3196.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3197.                 GET_MQUANT();

  3198.             }

  3199.             else

  3200.             {

  3201.                 mquant = v->pq;

  3202.                 cbp = 0;

  3203.             }

  3204.             s->current_picture.qscale_table[mb_pos] = mquant;

  3205. 

  3206.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3207.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3208.                                 VC1_TTMB_VLC_BITS, 2);

  3209.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3210.             dst_idx = 0;

  3211.             for (i=0; i<6; i++)

  3212.             {

  3213.                 s->dc_val[0][s->block_index[i]] = 0;

  3214.                 dst_idx += i >> 2;

  3215.                 val = ((cbp >> (5 - i)) & 1);

  3216.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3217.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3218.                 if(s->mb_intra) {

  3219.                     /* check if prediction blocks A and C are available */

  3220.                     v->a_avail = v->c_avail = 0;

  3221.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3222.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3223.                     if(i == 1 || i == 3 || s->mb_x)

  3224.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3225. 

  3226.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3227.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3228.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3229.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3230.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3231.                     if(v->pq >= 9 && v->overlap) {

  3232.                         if(v->c_avail)

  3233.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3234.                         if(v->a_avail)

  3235.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3236.                     }

  3237.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3238.                         int left_cbp, top_cbp;

  3239.                         if(i & 4){

  3240.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3241.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3242.                         }else{

  3243.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3244.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3245.                         }

  3246.                         if(left_cbp & 0xC)

  3247.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3248.                         if(top_cbp  & 0xA)

  3249.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3250.                     }

  3251.                     block_cbp |= 0xF << (i << 2);

  3252.                 } else if(val) {

  3253.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3254.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3255.                         filter = 1;

  3256.                         if(i & 4){

  3257.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3258.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3259.                         }else{

  3260.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3261.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3262.                         }

  3263.                         if(left_cbp & 0xC)

  3264.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3265.                         if(top_cbp  & 0xA)

  3266.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3267.                     }

  3268.                     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);

  3269.                     block_cbp |= pat << (i << 2);

  3270.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3271.                     first_block = 0;

  3272.                 }

  3273.             }

  3274.         }

  3275.         else //Skipped

  3276.         {

  3277.             s->mb_intra = 0;

  3278.             for(i = 0; i < 6; i++) {

  3279.                 v->mb_type[0][s->block_index[i]] = 0;

  3280.                 s->dc_val[0][s->block_index[i]] = 0;

  3281.             }

  3282.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3283.             s->current_picture.qscale_table[mb_pos] = 0;

  3284.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3285.             vc1_mc_1mv(v, 0);

  3286.             return 0;

  3287.         }

  3288.     } //1MV mode

  3289.     else //4MV mode

  3290.     {

  3291.         if (!skipped /* unskipped MB */)

  3292.         {

  3293.             int intra_count = 0, coded_inter = 0;

  3294.             int is_intra[6], is_coded[6];

  3295.             /* Get CBPCY */

  3296.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3297.             for (i=0; i<6; i++)

  3298.             {

  3299.                 val = ((cbp >> (5 - i)) & 1);

  3300.                 s->dc_val[0][s->block_index[i]] = 0;

  3301.                 s->mb_intra = 0;

  3302.                 if(i < 4) {

  3303.                     dmv_x = dmv_y = 0;

  3304.                     s->mb_intra = 0;

  3305.                     mb_has_coeffs = 0;

  3306.                     if(val) {

  3307.                         GET_MVDATA(dmv_x, dmv_y);

  3308.                     }

  3309.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3310.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3311.                     intra_count += s->mb_intra;

  3312.                     is_intra[i] = s->mb_intra;

  3313.                     is_coded[i] = mb_has_coeffs;

  3314.                 }

  3315.                 if(i&4){

  3316.                     is_intra[i] = (intra_count >= 3);

  3317.                     is_coded[i] = val;

  3318.                 }

  3319.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3320.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3321.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3322.             }

  3323.             // if there are no coded blocks then don't do anything more

  3324.             if(!intra_count && !coded_inter) return 0;

  3325.             dst_idx = 0;

  3326.             GET_MQUANT();

  3327.             s->current_picture.qscale_table[mb_pos] = mquant;

  3328.             /* test if block is intra and has pred */

  3329.             {

  3330.                 int intrapred = 0;

  3331.                 for(i=0; i<6; i++)

  3332.                     if(is_intra[i]) {

  3333.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3334.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3335.                             intrapred = 1;

  3336.                             break;

  3337.                         }

  3338.                     }

  3339.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3340.                 else s->ac_pred = 0;

  3341.             }

  3342.             if (!v->ttmbf && coded_inter)

  3343.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3344.             for (i=0; i<6; i++)

  3345.             {

  3346.                 dst_idx += i >> 2;

  3347.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3348.                 s->mb_intra = is_intra[i];

  3349.                 if (is_intra[i]) {

  3350.                     /* check if prediction blocks A and C are available */

  3351.                     v->a_avail = v->c_avail = 0;

  3352.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3353.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3354.                     if(i == 1 || i == 3 || s->mb_x)

  3355.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3356. 

  3357.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3358.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3359.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3360.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3361.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3362.                     if(v->pq >= 9 && v->overlap) {

  3363.                         if(v->c_avail)

  3364.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3365.                         if(v->a_avail)

  3366.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3367.                     }

  3368.                     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)){

  3369.                         int left_cbp, top_cbp;

  3370.                         if(i & 4){

  3371.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3372.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3373.                         }else{

  3374.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3375.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3376.                         }

  3377.                         if(left_cbp & 0xC)

  3378.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3379.                         if(top_cbp  & 0xA)

  3380.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3381.                     }

  3382.                     block_cbp |= 0xF << (i << 2);

  3383.                 } else if(is_coded[i]) {

  3384.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3385.                     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)){

  3386.                         filter = 1;

  3387.                         if(i & 4){

  3388.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3389.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3390.                         }else{

  3391.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3392.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3393.                         }

  3394.                         if(left_cbp & 0xC)

  3395.                             vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant);

  3396.                         if(top_cbp  & 0xA)

  3397.                             vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant);

  3398.                     }

  3399.                     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);

  3400.                     block_cbp |= pat << (i << 2);

  3401.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3402.                     first_block = 0;

  3403.                 }

  3404.             }

  3405.             return 0;

  3406.         }

  3407.         else //Skipped MB

  3408.         {

  3409.             s->mb_intra = 0;

  3410.             s->current_picture.qscale_table[mb_pos] = 0;

  3411.             for (i=0; i<6; i++) {

  3412.                 v->mb_type[0][s->block_index[i]] = 0;

  3413.                 s->dc_val[0][s->block_index[i]] = 0;

  3414.             }

  3415.             for (i=0; i<4; i++)

  3416.             {

  3417.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3418.                 vc1_mc_4mv_luma(v, i);

  3419.             }

  3420.             vc1_mc_4mv_chroma(v);

  3421.             s->current_picture.qscale_table[mb_pos] = 0;

  3422.             return 0;

  3423.         }

  3424.     }

  3425.     v->cbp[s->mb_x] = block_cbp;

  3426. 

  3427.     /* Should never happen */

  3428.     return -1;

  3429. }

  3430. 

  3431. /** Decode one B-frame MB (in Main profile)

  3432.  */

  3433. static void vc1_decode_b_mb(VC1Context *v)

  3434. {

  3435.     MpegEncContext *s = &v->s;

  3436.     GetBitContext *gb = &s->gb;

  3437.     int i, j;

  3438.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3439.     int cbp = 0; /* cbp decoding stuff */

  3440.     int mqdiff, mquant; /* MB quantization */

  3441.     int ttmb = v->ttfrm; /* MB Transform type */

  3442.     int mb_has_coeffs = 0; /* last_flag */

  3443.     int index, index1; /* LUT indexes */

  3444.     int val, sign; /* temp values */

  3445.     int first_block = 1;

  3446.     int dst_idx, off;

  3447.     int skipped, direct;

  3448.     int dmv_x[2], dmv_y[2];

  3449.     int bmvtype = BMV_TYPE_BACKWARD;

  3450. 

  3451.     mquant = v->pq; /* Loosy initialization */

  3452.     s->mb_intra = 0;

  3453. 

  3454.     if (v->dmb_is_raw)

  3455.         direct = get_bits1(gb);

  3456.     else

  3457.         direct = v->direct_mb_plane[mb_pos];

  3458.     if (v->skip_is_raw)

  3459.         skipped = get_bits1(gb);

  3460.     else

  3461.         skipped = v->s.mbskip_table[mb_pos];

  3462. 

  3463.     s->dsp.clear_blocks(s->block[0]);

  3464.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3465.     for(i = 0; i < 6; i++) {

  3466.         v->mb_type[0][s->block_index[i]] = 0;

  3467.         s->dc_val[0][s->block_index[i]] = 0;

  3468.     }

  3469.     s->current_picture.qscale_table[mb_pos] = 0;

  3470. 

  3471.     if (!direct) {

  3472.         if (!skipped) {

  3473.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3474.             dmv_x[1] = dmv_x[0];

  3475.             dmv_y[1] = dmv_y[0];

  3476.         }

  3477.         if(skipped || !s->mb_intra) {

  3478.             bmvtype = decode012(gb);

  3479.             switch(bmvtype) {

  3480.             case 0:

  3481.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3482.                 break;

  3483.             case 1:

  3484.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3485.                 break;

  3486.             case 2:

  3487.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3488.                 dmv_x[0] = dmv_y[0] = 0;

  3489.             }

  3490.         }

  3491.     }

  3492.     for(i = 0; i < 6; i++)

  3493.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3494. 

  3495.     if (skipped) {

  3496.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3497.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3498.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3499.         return;

  3500.     }

  3501.     if (direct) {

  3502.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3503.         GET_MQUANT();

  3504.         s->mb_intra = 0;

  3505.         mb_has_coeffs = 0;

  3506.         s->current_picture.qscale_table[mb_pos] = mquant;

  3507.         if(!v->ttmbf)

  3508.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3509.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3510.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3511.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3512.     } else {

  3513.         if(!mb_has_coeffs && !s->mb_intra) {

  3514.             /* no coded blocks - effectively skipped */

  3515.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3516.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3517.             return;

  3518.         }

  3519.         if(s->mb_intra && !mb_has_coeffs) {

  3520.             GET_MQUANT();

  3521.             s->current_picture.qscale_table[mb_pos] = mquant;

  3522.             s->ac_pred = get_bits1(gb);

  3523.             cbp = 0;

  3524.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3525.         } else {

  3526.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3527.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3528.                 if(!mb_has_coeffs) {

  3529.                     /* interpolated skipped block */

  3530.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3531.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3532.                     return;

  3533.                 }

  3534.             }

  3535.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3536.             if(!s->mb_intra) {

  3537.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3538.             }

  3539.             if(s->mb_intra)

  3540.                 s->ac_pred = get_bits1(gb);

  3541.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3542.             GET_MQUANT();

  3543.             s->current_picture.qscale_table[mb_pos] = mquant;

  3544.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3545.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3546.         }

  3547.     }

  3548.     dst_idx = 0;

  3549.     for (i=0; i<6; i++)

  3550.     {

  3551.         s->dc_val[0][s->block_index[i]] = 0;

  3552.         dst_idx += i >> 2;

  3553.         val = ((cbp >> (5 - i)) & 1);

  3554.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3555.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3556.         if(s->mb_intra) {

  3557.             /* check if prediction blocks A and C are available */

  3558.             v->a_avail = v->c_avail = 0;

  3559.             if(i == 2 || i == 3 || !s->first_slice_line)

  3560.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3561.             if(i == 1 || i == 3 || s->mb_x)

  3562.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3563. 

  3564.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3565.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3566.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3567.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3568.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3569.         } else if(val) {

  3570.             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);

  3571.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3572.             first_block = 0;

  3573.         }

  3574.     }

  3575. }

  3576. 

  3577. /** Decode blocks of I-frame

  3578.  */

  3579. static void vc1_decode_i_blocks(VC1Context *v)

  3580. {

  3581.     int k, j;

  3582.     MpegEncContext *s = &v->s;

  3583.     int cbp, val;

  3584.     uint8_t *coded_val;

  3585.     int mb_pos;

  3586. 

  3587.     /* select codingmode used for VLC tables selection */

  3588.     switch(v->y_ac_table_index){

  3589.     case 0:

  3590.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3591.         break;

  3592.     case 1:

  3593.         v->codingset = CS_HIGH_MOT_INTRA;

  3594.         break;

  3595.     case 2:

  3596.         v->codingset = CS_MID_RATE_INTRA;

  3597.         break;

  3598.     }

  3599. 

  3600.     switch(v->c_ac_table_index){

  3601.     case 0:

  3602.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3603.         break;

  3604.     case 1:

  3605.         v->codingset2 = CS_HIGH_MOT_INTER;

  3606.         break;

  3607.     case 2:

  3608.         v->codingset2 = CS_MID_RATE_INTER;

  3609.         break;

  3610.     }

  3611. 

  3612.     /* Set DC scale - y and c use the same */

  3613.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3614.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3615. 

  3616.     //do frame decode

  3617.     s->mb_x = s->mb_y = 0;

  3618.     s->mb_intra = 1;

  3619.     s->first_slice_line = 1;

  3620.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3621.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3622.             ff_init_block_index(s);

  3623.             ff_update_block_index(s);

  3624.             s->dsp.clear_blocks(s->block[0]);

  3625.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3626.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3627.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3628.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3629.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3630. 

  3631.             // do actual MB decoding and displaying

  3632.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3633.             v->s.ac_pred = get_bits1(&v->s.gb);

  3634. 

  3635.             for(k = 0; k < 6; k++) {

  3636.                 val = ((cbp >> (5 - k)) & 1);

  3637. 

  3638.                 if (k < 4) {

  3639.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3640.                     val = val ^ pred;

  3641.                     *coded_val = val;

  3642.                 }

  3643.                 cbp |= val << (5 - k);

  3644. 

  3645.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3646. 

  3647.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3648.                 if(v->pq >= 9 && v->overlap) {

  3649.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3650.                 }

  3651.             }

  3652. 

  3653.             vc1_put_block(v, s->block);

  3654.             if(v->pq >= 9 && v->overlap) {

  3655.                 if(s->mb_x) {

  3656.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3657.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3658.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3659.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3660.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3661.                     }

  3662.                 }

  3663.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3664.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3665.                 if(!s->first_slice_line) {

  3666.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3667.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3668.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3669.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3670.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3671.                     }

  3672.                 }

  3673.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3674.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3675.             }

  3676.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]);

  3677. 

  3678.             if(get_bits_count(&s->gb) > v->bits) {

  3679.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3680.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3681.                 return;

  3682.             }

  3683.         }

  3684.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3685.         s->first_slice_line = 0;

  3686.     }

  3687.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3688. }

  3689. 

  3690. /** Decode blocks of I-frame for advanced profile

  3691.  */

  3692. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3693. {

  3694.     int k, j;

  3695.     MpegEncContext *s = &v->s;

  3696.     int cbp, val;

  3697.     uint8_t *coded_val;

  3698.     int mb_pos;

  3699.     int mquant = v->pq;

  3700.     int mqdiff;

  3701.     int overlap;

  3702.     GetBitContext *gb = &s->gb;

  3703. 

  3704.     /* select codingmode used for VLC tables selection */

  3705.     switch(v->y_ac_table_index){

  3706.     case 0:

  3707.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3708.         break;

  3709.     case 1:

  3710.         v->codingset = CS_HIGH_MOT_INTRA;

  3711.         break;

  3712.     case 2:

  3713.         v->codingset = CS_MID_RATE_INTRA;

  3714.         break;

  3715.     }

  3716. 

  3717.     switch(v->c_ac_table_index){

  3718.     case 0:

  3719.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3720.         break;

  3721.     case 1:

  3722.         v->codingset2 = CS_HIGH_MOT_INTER;

  3723.         break;

  3724.     case 2:

  3725.         v->codingset2 = CS_MID_RATE_INTER;

  3726.         break;

  3727.     }

  3728. 

  3729.     //do frame decode

  3730.     s->mb_x = s->mb_y = 0;

  3731.     s->mb_intra = 1;

  3732.     s->first_slice_line = 1;

  3733.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3734.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3735.             ff_init_block_index(s);

  3736.             ff_update_block_index(s);

  3737.             s->dsp.clear_blocks(s->block[0]);

  3738.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3739.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3740.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3741.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3742. 

  3743.             // do actual MB decoding and displaying

  3744.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3745.             if(v->acpred_is_raw)

  3746.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3747.             else

  3748.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3749. 

  3750.             if(v->condover == CONDOVER_SELECT) {

  3751.                 if(v->overflg_is_raw)

  3752.                     overlap = get_bits1(&v->s.gb);

  3753.                 else

  3754.                     overlap = v->over_flags_plane[mb_pos];

  3755.             } else

  3756.                 overlap = (v->condover == CONDOVER_ALL);

  3757. 

  3758.             GET_MQUANT();

  3759. 

  3760.             s->current_picture.qscale_table[mb_pos] = mquant;

  3761.             /* Set DC scale - y and c use the same */

  3762.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3763.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3764. 

  3765.             for(k = 0; k < 6; k++) {

  3766.                 val = ((cbp >> (5 - k)) & 1);

  3767. 

  3768.                 if (k < 4) {

  3769.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3770.                     val = val ^ pred;

  3771.                     *coded_val = val;

  3772.                 }

  3773.                 cbp |= val << (5 - k);

  3774. 

  3775.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3776.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3777. 

  3778.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3779. 

  3780.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3781.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3782.             }

  3783. 

  3784.             vc1_put_block(v, s->block);

  3785.             if(overlap) {

  3786.                 if(s->mb_x) {

  3787.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3788.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3789.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3790.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3791.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3792.                     }

  3793.                 }

  3794.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3795.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3796.                 if(!s->first_slice_line) {

  3797.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3798.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3799.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3800.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3801.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3802.                     }

  3803.                 }

  3804.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3805.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3806.             }

  3807.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]);

  3808. 

  3809.             if(get_bits_count(&s->gb) > v->bits) {

  3810.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3811.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3812.                 return;

  3813.             }

  3814.         }

  3815.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3816.         s->first_slice_line = 0;

  3817.     }

  3818.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3819. }

  3820. 

  3821. static void vc1_decode_p_blocks(VC1Context *v)

  3822. {

  3823.     MpegEncContext *s = &v->s;

  3824. 

  3825.     /* select codingmode used for VLC tables selection */

  3826.     switch(v->c_ac_table_index){

  3827.     case 0:

  3828.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3829.         break;

  3830.     case 1:

  3831.         v->codingset = CS_HIGH_MOT_INTRA;

  3832.         break;

  3833.     case 2:

  3834.         v->codingset = CS_MID_RATE_INTRA;

  3835.         break;

  3836.     }

  3837. 

  3838.     switch(v->c_ac_table_index){

  3839.     case 0:

  3840.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3841.         break;

  3842.     case 1:

  3843.         v->codingset2 = CS_HIGH_MOT_INTER;

  3844.         break;

  3845.     case 2:

  3846.         v->codingset2 = CS_MID_RATE_INTER;

  3847.         break;

  3848.     }

  3849. 

  3850.     s->first_slice_line = 1;

  3851.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  3852.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3853.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3854.             ff_init_block_index(s);

  3855.             ff_update_block_index(s);

  3856.             s->dsp.clear_blocks(s->block[0]);

  3857. 

  3858.             vc1_decode_p_mb(v);

  3859.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3860.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3861.                 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);

  3862.                 return;

  3863.             }

  3864.         }

  3865.         memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride);

  3866.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3867.         s->first_slice_line = 0;

  3868.     }

  3869.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3870. }

  3871. 

  3872. static void vc1_decode_b_blocks(VC1Context *v)

  3873. {

  3874.     MpegEncContext *s = &v->s;

  3875. 

  3876.     /* select codingmode used for VLC tables selection */

  3877.     switch(v->c_ac_table_index){

  3878.     case 0:

  3879.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3880.         break;

  3881.     case 1:

  3882.         v->codingset = CS_HIGH_MOT_INTRA;

  3883.         break;

  3884.     case 2:

  3885.         v->codingset = CS_MID_RATE_INTRA;

  3886.         break;

  3887.     }

  3888. 

  3889.     switch(v->c_ac_table_index){

  3890.     case 0:

  3891.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3892.         break;

  3893.     case 1:

  3894.         v->codingset2 = CS_HIGH_MOT_INTER;

  3895.         break;

  3896.     case 2:

  3897.         v->codingset2 = CS_MID_RATE_INTER;

  3898.         break;

  3899.     }

  3900. 

  3901.     s->first_slice_line = 1;

  3902.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3903.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3904.             ff_init_block_index(s);

  3905.             ff_update_block_index(s);

  3906.             s->dsp.clear_blocks(s->block[0]);

  3907. 

  3908.             vc1_decode_b_mb(v);

  3909.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3910.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3911.                 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);

  3912.                 return;

  3913.             }

  3914.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[s->mb_x + s->mb_y *s->mb_stride]);

  3915.         }

  3916.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3917.         s->first_slice_line = 0;

  3918.     }

  3919.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3920. }

  3921. 

  3922. static void vc1_decode_skip_blocks(VC1Context *v)

  3923. {

  3924.     MpegEncContext *s = &v->s;

  3925. 

  3926.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3927.     s->first_slice_line = 1;

  3928.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3929.         s->mb_x = 0;

  3930.         ff_init_block_index(s);

  3931.         ff_update_block_index(s);

  3932.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3933.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3934.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3935.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3936.         s->first_slice_line = 0;

  3937.     }

  3938.     s->pict_type = FF_P_TYPE;

  3939. }

  3940. 

  3941. static void vc1_decode_blocks(VC1Context *v)

  3942. {

  3943. 

  3944.     v->s.esc3_level_length = 0;

  3945.     if(v->x8_type){

  3946.         ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );

  3947.     }else{

  3948. 

  3949.         switch(v->s.pict_type) {

  3950.         case FF_I_TYPE:

  3951.             if(v->profile == PROFILE_ADVANCED)

  3952.                 vc1_decode_i_blocks_adv(v);

  3953.             else

  3954.                 vc1_decode_i_blocks(v);

  3955.             break;

  3956.         case FF_P_TYPE:

  3957.             if(v->p_frame_skipped)

  3958.                 vc1_decode_skip_blocks(v);

  3959.             else

  3960.                 vc1_decode_p_blocks(v);

  3961.             break;

  3962.         case FF_B_TYPE:

  3963.             if(v->bi_type){

  3964.                 if(v->profile == PROFILE_ADVANCED)

  3965.                     vc1_decode_i_blocks_adv(v);

  3966.                 else

  3967.                     vc1_decode_i_blocks(v);

  3968.             }else

  3969.                 vc1_decode_b_blocks(v);

  3970.             break;

  3971.         }

  3972.     }

  3973. }

  3974. 

  3975. /** Find VC-1 marker in buffer

  3976.  * @return position where next marker starts or end of buffer if no marker found

  3977.  */

  3978. static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)

  3979. {

  3980.     uint32_t mrk = 0xFFFFFFFF;

  3981. 

  3982.     if(end-src < 4) return end;

  3983.     while(src < end){

  3984.         mrk = (mrk << 8) | *src++;

  3985.         if(IS_MARKER(mrk))

  3986.             return src-4;

  3987.     }

  3988.     return end;

  3989. }

  3990. 

  3991. static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)

  3992. {

  3993.     int dsize = 0, i;

  3994. 

  3995.     if(size < 4){

  3996.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  3997.         return size;

  3998.     }

  3999.     for(i = 0; i < size; i++, src++) {

  4000.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  4001.             dst[dsize++] = src[1];

  4002.             src++;

  4003.             i++;

  4004.         } else

  4005.             dst[dsize++] = *src;

  4006.     }

  4007.     return dsize;

  4008. }

  4009. 

  4010. /** Initialize a VC1/WMV3 decoder

  4011.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4012.  * @todo TODO: Decypher remaining bits in extra_data

  4013.  */

  4014. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  4015. {

  4016.     VC1Context *v = avctx->priv_data;

  4017.     MpegEncContext *s = &v->s;

  4018.     GetBitContext gb;

  4019. 

  4020.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  4021.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  4022.         avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);

  4023.     else

  4024.         avctx->pix_fmt = PIX_FMT_GRAY8;

  4025.     avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);

  4026.     v->s.avctx = avctx;

  4027.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  4028.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  4029. 

  4030.     if(avctx->idct_algo==FF_IDCT_AUTO){

  4031.         avctx->idct_algo=FF_IDCT_WMV2;

  4032.     }

  4033. 

  4034.     if(ff_h263_decode_init(avctx) < 0)

  4035.         return -1;

  4036.     if (vc1_init_common(v) < 0) return -1;

  4037. 

  4038.     avctx->coded_width = avctx->width;

  4039.     avctx->coded_height = avctx->height;

  4040.     if (avctx->codec_id == CODEC_ID_WMV3)

  4041.     {

  4042.         int count = 0;

  4043. 

  4044.         // looks like WMV3 has a sequence header stored in the extradata

  4045.         // advanced sequence header may be before the first frame

  4046.         // the last byte of the extradata is a version number, 1 for the

  4047.         // samples we can decode

  4048. 

  4049.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  4050. 

  4051.         if (decode_sequence_header(avctx, &gb) < 0)

  4052.           return -1;

  4053. 

  4054.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  4055.         if (count>0)

  4056.         {

  4057.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  4058.                    count, get_bits(&gb, count));

  4059.         }

  4060.         else if (count < 0)

  4061.         {

  4062.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  4063.         }

  4064.     } else { // VC1/WVC1

  4065.         const uint8_t *start = avctx->extradata;

  4066.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  4067.         const uint8_t *next;

  4068.         int size, buf2_size;

  4069.         uint8_t *buf2 = NULL;

  4070.         int seq_initialized = 0, ep_initialized = 0;

  4071. 

  4072.         if(avctx->extradata_size < 16) {

  4073.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  4074.             return -1;

  4075.         }

  4076. 

  4077.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4078.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  4079.         next = start;

  4080.         for(; next < end; start = next){

  4081.             next = find_next_marker(start + 4, end);

  4082.             size = next - start - 4;

  4083.             if(size <= 0) continue;

  4084.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  4085.             init_get_bits(&gb, buf2, buf2_size * 8);

  4086.             switch(AV_RB32(start)){

  4087.             case VC1_CODE_SEQHDR:

  4088.                 if(decode_sequence_header(avctx, &gb) < 0){

  4089.                     av_free(buf2);

  4090.                     return -1;

  4091.                 }

  4092.                 seq_initialized = 1;

  4093.                 break;

  4094.             case VC1_CODE_ENTRYPOINT:

  4095.                 if(decode_entry_point(avctx, &gb) < 0){

  4096.                     av_free(buf2);

  4097.                     return -1;

  4098.                 }

  4099.                 ep_initialized = 1;

  4100.                 break;

  4101.             }

  4102.         }

  4103.         av_free(buf2);

  4104.         if(!seq_initialized || !ep_initialized){

  4105.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4106.             return -1;

  4107.         }

  4108.     }

  4109.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4110.     s->low_delay = !avctx->has_b_frames;

  4111. 

  4112.     s->mb_width = (avctx->coded_width+15)>>4;

  4113.     s->mb_height = (avctx->coded_height+15)>>4;

  4114. 

  4115.     /* Allocate mb bitplanes */

  4116.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4117.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4118.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4119.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4120. 

  4121.     v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  4122.     v->cbp = v->cbp_base + s->mb_stride;

  4123. 

  4124.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4125.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4126.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4127.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4128.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4129. 

  4130.     /* Init coded blocks info */

  4131.     if (v->profile == PROFILE_ADVANCED)

  4132.     {

  4133. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4134. //            return -1;

  4135. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4136. //            return -1;

  4137.     }

  4138. 

  4139.     ff_intrax8_common_init(&v->x8,s);

  4140.     return 0;

  4141. }

  4142. 

  4143. 

  4144. /** Decode a VC1/WMV3 frame

  4145.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4146.  */

  4147. static int vc1_decode_frame(AVCodecContext *avctx,

  4148.                             void *data, int *data_size,

  4149.                             AVPacket *avpkt)

  4150. {

  4151.     const uint8_t *buf = avpkt->data;

  4152.     int buf_size = avpkt->size;

  4153.     VC1Context *v = avctx->priv_data;

  4154.     MpegEncContext *s = &v->s;

  4155.     AVFrame *pict = data;

  4156.     uint8_t *buf2 = NULL;

  4157.     const uint8_t *buf_start = buf;

  4158. 

  4159.     /* no supplementary picture */

  4160.     if (buf_size == 0) {

  4161.         /* special case for last picture */

  4162.         if (s->low_delay==0 && s->next_picture_ptr) {

  4163.             *pict= *(AVFrame*)s->next_picture_ptr;

  4164.             s->next_picture_ptr= NULL;

  4165. 

  4166.             *data_size = sizeof(AVFrame);

  4167.         }

  4168. 

  4169.         return 0;

  4170.     }

  4171. 

  4172.     /* We need to set current_picture_ptr before reading the header,

  4173.      * otherwise we cannot store anything in there. */

  4174.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4175.         int i= ff_find_unused_picture(s, 0);

  4176.         s->current_picture_ptr= &s->picture[i];

  4177.     }

  4178. 

  4179.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){

  4180.         if (v->profile < PROFILE_ADVANCED)

  4181.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  4182.         else

  4183.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  4184.     }

  4185. 

  4186.     //for advanced profile we may need to parse and unescape data

  4187.     if (avctx->codec_id == CODEC_ID_VC1) {

  4188.         int buf_size2 = 0;

  4189.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4190. 

  4191.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4192.             const uint8_t *start, *end, *next;

  4193.             int size;

  4194. 

  4195.             next = buf;

  4196.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4197.                 next = find_next_marker(start + 4, end);

  4198.                 size = next - start - 4;

  4199.                 if(size <= 0) continue;

  4200.                 switch(AV_RB32(start)){

  4201.                 case VC1_CODE_FRAME:

  4202.                     if (avctx->hwaccel ||

  4203.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4204.                         buf_start = start;

  4205.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4206.                     break;

  4207.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4208.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4209.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4210.                     decode_entry_point(avctx, &s->gb);

  4211.                     break;

  4212.                 case VC1_CODE_SLICE:

  4213.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4214.                     av_free(buf2);

  4215.                     return -1;

  4216.                 }

  4217.             }

  4218.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4219.             const uint8_t *divider;

  4220. 

  4221.             divider = find_next_marker(buf, buf + buf_size);

  4222.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4223.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4224.                 av_free(buf2);

  4225.                 return -1;

  4226.             }

  4227. 

  4228.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4229.             // TODO

  4230.             av_free(buf2);return -1;

  4231.         }else{

  4232.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4233.         }

  4234.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4235.     } else

  4236.         init_get_bits(&s->gb, buf, buf_size*8);

  4237.     // do parse frame header

  4238.     if(v->profile < PROFILE_ADVANCED) {

  4239.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4240.             av_free(buf2);

  4241.             return -1;

  4242.         }

  4243.     } else {

  4244.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4245.             av_free(buf2);

  4246.             return -1;

  4247.         }

  4248.     }

  4249. 

  4250.     if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){

  4251.         av_free(buf2);

  4252.         return -1;

  4253.     }

  4254. 

  4255.     // for hurry_up==5

  4256.     s->current_picture.pict_type= s->pict_type;

  4257.     s->current_picture.key_frame= s->pict_type == FF_I_TYPE;

  4258. 

  4259.     /* skip B-frames if we don't have reference frames */

  4260.     if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){

  4261.         av_free(buf2);

  4262.         return -1;//buf_size;

  4263.     }

  4264.     /* skip b frames if we are in a hurry */

  4265.     if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;

  4266.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)

  4267.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)

  4268.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4269.         av_free(buf2);

  4270.         return buf_size;

  4271.     }

  4272.     /* skip everything if we are in a hurry>=5 */

  4273.     if(avctx->hurry_up>=5) {

  4274.         av_free(buf2);

  4275.         return -1;//buf_size;

  4276.     }

  4277. 

  4278.     if(s->next_p_frame_damaged){

  4279.         if(s->pict_type==FF_B_TYPE)

  4280.             return buf_size;

  4281.         else

  4282.             s->next_p_frame_damaged=0;

  4283.     }

  4284. 

  4285.     if(MPV_frame_start(s, avctx) < 0) {

  4286.         av_free(buf2);

  4287.         return -1;

  4288.     }

  4289. 

  4290.     s->me.qpel_put= s->dsp.put_qpel_pixels_tab;

  4291.     s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;

  4292. 

  4293.     if ((CONFIG_VC1_VDPAU_DECODER || CONFIG_WMV3_VDPAU_DECODER)

  4294.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4295.         ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  4296.     else if (avctx->hwaccel) {

  4297.         if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)

  4298.             return -1;

  4299.         if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  4300.             return -1;

  4301.         if (avctx->hwaccel->end_frame(avctx) < 0)

  4302.             return -1;

  4303.     } else {

  4304.         ff_er_frame_start(s);

  4305. 

  4306.         v->bits = buf_size * 8;

  4307.         vc1_decode_blocks(v);

  4308. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4309. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4310. //      return -1;

  4311.         ff_er_frame_end(s);

  4312.     }

  4313. 

  4314.     MPV_frame_end(s);

  4315. 

  4316. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4317. assert(s->current_picture.pict_type == s->pict_type);

  4318.     if (s->pict_type == FF_B_TYPE || s->low_delay) {

  4319.         *pict= *(AVFrame*)s->current_picture_ptr;

  4320.     } else if (s->last_picture_ptr != NULL) {

  4321.         *pict= *(AVFrame*)s->last_picture_ptr;

  4322.     }

  4323. 

  4324.     if(s->last_picture_ptr || s->low_delay){

  4325.         *data_size = sizeof(AVFrame);

  4326.         ff_print_debug_info(s, pict);

  4327.     }

  4328. 

  4329.     /* Return the Picture timestamp as the frame number */

  4330.     /* we subtract 1 because it is added on utils.c     */

  4331.     avctx->frame_number = s->picture_number - 1;

  4332. 

  4333.     av_free(buf2);

  4334.     return buf_size;

  4335. }

  4336. 

  4337. 

  4338. /** Close a VC1/WMV3 decoder

  4339.  * @warning Initial try at using MpegEncContext stuff

  4340.  */

  4341. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  4342. {

  4343.     VC1Context *v = avctx->priv_data;

  4344. 

  4345.     av_freep(&v->hrd_rate);

  4346.     av_freep(&v->hrd_buffer);

  4347.     MPV_common_end(&v->s);

  4348.     av_freep(&v->mv_type_mb_plane);

  4349.     av_freep(&v->direct_mb_plane);

  4350.     av_freep(&v->acpred_plane);

  4351.     av_freep(&v->over_flags_plane);

  4352.     av_freep(&v->mb_type_base);

  4353.     av_freep(&v->cbp_base);

  4354.     ff_intrax8_common_end(&v->x8);

  4355.     return 0;

  4356. }

  4357. 

  4358. 

  4359. AVCodec vc1_decoder = {

  4360.     "vc1",

  4361.     CODEC_TYPE_VIDEO,

  4362.     CODEC_ID_VC1,

  4363.     sizeof(VC1Context),

  4364.     vc1_decode_init,

  4365.     NULL,

  4366.     vc1_decode_end,

  4367.     vc1_decode_frame,

  4368.     CODEC_CAP_DELAY,

  4369.     NULL,

  4370.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  4371.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4372. };

  4373. 

  4374. AVCodec wmv3_decoder = {

  4375.     "wmv3",

  4376.     CODEC_TYPE_VIDEO,

  4377.     CODEC_ID_WMV3,

  4378.     sizeof(VC1Context),

  4379.     vc1_decode_init,

  4380.     NULL,

  4381.     vc1_decode_end,

  4382.     vc1_decode_frame,

  4383.     CODEC_CAP_DELAY,

  4384.     NULL,

  4385.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  4386.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4387. };

  4388. 

  4389. #if CONFIG_WMV3_VDPAU_DECODER

  4390. AVCodec wmv3_vdpau_decoder = {

  4391.     "wmv3_vdpau",

  4392.     CODEC_TYPE_VIDEO,

  4393.     CODEC_ID_WMV3,

  4394.     sizeof(VC1Context),

  4395.     vc1_decode_init,

  4396.     NULL,

  4397.     vc1_decode_end,

  4398.     vc1_decode_frame,

  4399.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4400.     NULL,

  4401.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  4402.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_WMV3, PIX_FMT_NONE}

  4403. };

  4404. #endif

  4405. 

  4406. #if CONFIG_VC1_VDPAU_DECODER

  4407. AVCodec vc1_vdpau_decoder = {

  4408.     "vc1_vdpau",

  4409.     CODEC_TYPE_VIDEO,

  4410.     CODEC_ID_VC1,

  4411.     sizeof(VC1Context),

  4412.     vc1_decode_init,

  4413.     NULL,

  4414.     vc1_decode_end,

  4415.     vc1_decode_frame,

  4416.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4417.     NULL,

  4418.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  4419.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_VC1, PIX_FMT_NONE}

  4420. };

  4421. #endif