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FFmpeg/libavcodec/vc1.c

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  1. /*

  2.  * VC-1 and WMV3 decoder

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

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file vc1.c

  25.  * VC-1 and WMV3 decoder

  26.  *

  27.  */

  28. #include "dsputil.h"

  29. #include "avcodec.h"

  30. #include "mpegvideo.h"

  31. #include "vc1.h"

  32. #include "vc1data.h"

  33. #include "vc1acdata.h"

  34. #include "msmpeg4data.h"

  35. 

  36. #undef NDEBUG

  37. #include <assert.h>

  38. 

  39. #define MB_INTRA_VLC_BITS 9

  40. #define DC_VLC_BITS 9

  41. #define AC_VLC_BITS 9

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

  43. 

  44. 

  45. static inline int decode210(GetBitContext *gb){

  46.     if (get_bits1(gb))

  47.         return 0;

  48.     else

  49.         return 2 - get_bits1(gb);

  50. }

  51. 

  52. /**

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

  54.  * @param v The VC1Context to initialize

  55.  * @return Status

  56.  */

  57. static int vc1_init_common(VC1Context *v)

  58. {

  59.     static int done = 0;

  60.     int i = 0;

  61. 

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

  63. 

  64.     /* VLC tables */

  65.     if(!done)

  66.     {

  67.         done = 1;

  68.         init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  69.                  ff_vc1_bfraction_bits, 1, 1,

  70.                  ff_vc1_bfraction_codes, 1, 1, 1);

  71.         init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  72.                  ff_vc1_norm2_bits, 1, 1,

  73.                  ff_vc1_norm2_codes, 1, 1, 1);

  74.         init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  75.                  ff_vc1_norm6_bits, 1, 1,

  76.                  ff_vc1_norm6_codes, 2, 2, 1);

  77.         init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  78.                  ff_vc1_imode_bits, 1, 1,

  79.                  ff_vc1_imode_codes, 1, 1, 1);

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

  81.         {

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

  83.                      ff_vc1_ttmb_bits[i], 1, 1,

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

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

  86.                      ff_vc1_ttblk_bits[i], 1, 1,

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

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

  89.                      ff_vc1_subblkpat_bits[i], 1, 1,

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

  91.         }

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

  93.         {

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

  95.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

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

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

  98.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

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

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

  101.                      ff_vc1_mv_diff_bits[i], 1, 1,

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

  103.         }

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

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

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

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

  108.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

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

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

  111.     }

  112. 

  113.     /* Other defaults */

  114.     v->pq = -1;

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

  116. 

  117.     return 0;

  118. }

  119. 

  120. /***********************************************************************/

  121. /**

  122.  * @defgroup bitplane VC9 Bitplane decoding

  123.  * @see 8.7, p56

  124.  * @{

  125.  */

  126. 

  127. /** @addtogroup bitplane

  128.  * Imode types

  129.  * @{

  130.  */

  131. enum Imode {

  132.     IMODE_RAW,

  133.     IMODE_NORM2,

  134.     IMODE_DIFF2,

  135.     IMODE_NORM6,

  136.     IMODE_DIFF6,

  137.     IMODE_ROWSKIP,

  138.     IMODE_COLSKIP

  139. };

  140. /** @} */ //imode defines

  141. 

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

  143.  * @param plane Buffer to store decoded bits

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

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

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

  147.  */

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

  149.     int x, y;

  150. 

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

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

  153.             memset(plane, 0, width);

  154.         else

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

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

  157.         plane += stride;

  158.     }

  159. }

  160. 

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

  162.  * @param plane Buffer to store decoded bits

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

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

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

  166.  * @todo FIXME: Optimize

  167.  */

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

  169.     int x, y;

  170. 

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

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

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

  174.                 plane[y*stride] = 0;

  175.         else

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

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

  178.         plane ++;

  179.     }

  180. }

  181. 

  182. /** Decode a bitplane's bits

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

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

  185.  * @return Status

  186.  * @todo FIXME: Optimize

  187.  */

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

  189. {

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

  191. 

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

  193.     uint8_t invert, *planep = data;

  194.     int width, height, stride;

  195. 

  196.     width = v->s.mb_width;

  197.     height = v->s.mb_height;

  198.     stride = v->s.mb_stride;

  199.     invert = get_bits1(gb);

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

  201. 

  202.     *raw_flag = 0;

  203.     switch (imode)

  204.     {

  205.     case IMODE_RAW:

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

  207.         *raw_flag = 1; //invert ignored

  208.         return invert;

  209.     case IMODE_DIFF2:

  210.     case IMODE_NORM2:

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

  212.         {

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

  214.             offset = 1;

  215.         }

  216.         else offset = 0;

  217.         // decode bitplane as one long line

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

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

  220.             *planep++ = code & 1;

  221.             offset++;

  222.             if(offset == width) {

  223.                 offset = 0;

  224.                 planep += stride - width;

  225.             }

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

  227.             offset++;

  228.             if(offset == width) {

  229.                 offset = 0;

  230.                 planep += stride - width;

  231.             }

  232.         }

  233.         break;

  234.     case IMODE_DIFF6:

  235.     case IMODE_NORM6:

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

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

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

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

  240.                     if(code < 0){

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

  242.                         return -1;

  243.                     }

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

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

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

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

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

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

  250.                 }

  251.                 planep += stride * 3;

  252.             }

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

  254.         } else { // 3x2

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

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

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

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

  259.                     if(code < 0){

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

  261.                         return -1;

  262.                     }

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

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

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

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

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

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

  269.                 }

  270.                 planep += stride * 2;

  271.             }

  272.             x = width % 3;

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

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

  275.         }

  276.         break;

  277.     case IMODE_ROWSKIP:

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

  279.         break;

  280.     case IMODE_COLSKIP:

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

  282.         break;

  283.     default: break;

  284.     }

  285. 

  286.     /* Applying diff operator */

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

  288.     {

  289.         planep = data;

  290.         planep[0] ^= invert;

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

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

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

  294.         {

  295.             planep += stride;

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

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

  298.             {

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

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

  301.             }

  302.         }

  303.     }

  304.     else if (invert)

  305.     {

  306.         planep = data;

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

  308.     }

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

  310. }

  311. 

  312. /** @} */ //Bitplane group

  313. 

  314. /***********************************************************************/

  315. /** VOP Dquant decoding

  316.  * @param v VC-1 Context

  317.  */

  318. static int vop_dquant_decoding(VC1Context *v)

  319. {

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

  321.     int pqdiff;

  322. 

  323.     //variable size

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

  325.     {

  326.         pqdiff = get_bits(gb, 3);

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

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

  329.     }

  330.     else

  331.     {

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

  333.         if ( v->dquantfrm )

  334.         {

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

  336.             switch (v->dqprofile)

  337.             {

  338.             case DQPROFILE_SINGLE_EDGE:

  339.             case DQPROFILE_DOUBLE_EDGES:

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

  341.                 break;

  342.             case DQPROFILE_ALL_MBS:

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

  344.             default: break; //Forbidden ?

  345.             }

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

  347.             {

  348.                 pqdiff = get_bits(gb, 3);

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

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

  351.             }

  352.         }

  353.     }

  354.     return 0;

  355. }

  356. 

  357. /** Put block onto picture

  358.  */

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

  360. {

  361.     uint8_t *Y;

  362.     int ys, us, vs;

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

  364. 

  365.     if(v->rangeredfrm) {

  366.         int i, j, k;

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

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

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

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

  371. 

  372.     }

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

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

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

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

  377. 

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

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

  380.     Y += ys * 8;

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

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

  383. 

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

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

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

  387.     }

  388. }

  389. 

  390. /** Do motion compensation over 1 macroblock

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

  392.  */

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

  394. {

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

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

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

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

  399. 

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

  401. 

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

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

  404. 

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

  406.     if(s->pict_type == P_TYPE) {

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

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

  409.     }

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

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

  412.     if(v->fastuvmc) {

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

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

  415.     }

  416.     if(!dir) {

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

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

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

  420.     } else {

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

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

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

  424.     }

  425. 

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

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

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

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

  430. 

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

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

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

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

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

  436.     }else{

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

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

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

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

  441.     }

  442. 

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

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

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

  446. 

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

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

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

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

  451.     }

  452. 

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

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

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

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

  457. 

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

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

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

  461.         srcY = s->edge_emu_buffer;

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

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

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

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

  466.         srcU = uvbuf;

  467.         srcV = uvbuf + 16;

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

  469.         if(v->rangeredfrm) {

  470.             int i, j;

  471.             uint8_t *src, *src2;

  472. 

  473.             src = srcY;

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

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

  476.                 src += s->linesize;

  477.             }

  478.             src = srcU; src2 = srcV;

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

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

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

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

  483.                 }

  484.                 src += s->uvlinesize;

  485.                 src2 += s->uvlinesize;

  486.             }

  487.         }

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

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

  490.             int i, j;

  491.             uint8_t *src, *src2;

  492. 

  493.             src = srcY;

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

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

  496.                 src += s->linesize;

  497.             }

  498.             src = srcU; src2 = srcV;

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

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

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

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

  503.                 }

  504.                 src += s->uvlinesize;

  505.                 src2 += s->uvlinesize;

  506.             }

  507.         }

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

  509.     }

  510. 

  511.     if(s->mspel) {

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

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

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

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

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

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

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

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

  520. 

  521.         if(!v->rnd)

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

  523.         else

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

  525.     }

  526. 

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

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

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

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

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

  532.     if(!v->rnd){

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

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

  535.     }else{

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

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

  538.     }

  539. }

  540. 

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

  542.  */

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

  544. {

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

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

  547.     uint8_t *srcY;

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

  549.     int off;

  550. 

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

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

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

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

  555. 

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

  557. 

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

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

  560. 

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

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

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

  564.     }else{

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

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

  567.     }

  568. 

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

  570. 

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

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

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

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

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

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

  577.         srcY = s->edge_emu_buffer;

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

  579.         if(v->rangeredfrm) {

  580.             int i, j;

  581.             uint8_t *src;

  582. 

  583.             src = srcY;

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

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

  586.                 src += s->linesize;

  587.             }

  588.         }

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

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

  591.             int i, j;

  592.             uint8_t *src;

  593. 

  594.             src = srcY;

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

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

  597.                 src += s->linesize;

  598.             }

  599.         }

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

  601.     }

  602. 

  603.     if(s->mspel) {

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

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

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

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

  608.         if(!v->rnd)

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

  610.         else

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

  612.     }

  613. }

  614. 

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

  616. {

  617.     if(a < b) {

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

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

  620.     } else {

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

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

  623.     }

  624. }

  625. 

  626. 

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

  628.  */

  629. static void vc1_mc_4mv_chroma(VC1Context *v)

  630. {

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

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

  633.     uint8_t *srcU, *srcV;

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

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

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

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

  638. 

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

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

  641. 

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

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

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

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

  646.     }

  647. 

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

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

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

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

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

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

  654.         switch(idx) {

  655.         case 0x1:

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

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

  658.             break;

  659.         case 0x2:

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

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

  662.             break;

  663.         case 0x4:

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

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

  666.             break;

  667.         case 0x8:

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

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

  670.             break;

  671.         }

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

  673.         int t1 = 0, t2 = 0;

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

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

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

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

  678.     } else {

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

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

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

  682.     }

  683. 

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

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

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

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

  688.     if(v->fastuvmc) {

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

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

  691.     }

  692. 

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

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

  695. 

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

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

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

  699.     }else{

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

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

  702.     }

  703. 

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

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

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

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

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

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

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

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

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

  713.         srcU = s->edge_emu_buffer;

  714.         srcV = s->edge_emu_buffer + 16;

  715. 

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

  717.         if(v->rangeredfrm) {

  718.             int i, j;

  719.             uint8_t *src, *src2;

  720. 

  721.             src = srcU; src2 = srcV;

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

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

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

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

  726.                 }

  727.                 src += s->uvlinesize;

  728.                 src2 += s->uvlinesize;

  729.             }

  730.         }

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

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

  733.             int i, j;

  734.             uint8_t *src, *src2;

  735. 

  736.             src = srcU; src2 = srcV;

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

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

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

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

  741.                 }

  742.                 src += s->uvlinesize;

  743.                 src2 += s->uvlinesize;

  744.             }

  745.         }

  746.     }

  747. 

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

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

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

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

  752.     if(!v->rnd){

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

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

  755.     }else{

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

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

  758.     }

  759. }

  760. 

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

  762. 

  763. /**

  764.  * Decode Simple/Main Profiles sequence header

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

  766.  * @param avctx Codec context

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

  768.  * @return Status

  769.  */

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

  771. {

  772.     VC1Context *v = avctx->priv_data;

  773. 

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

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

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

  777.     {

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

  779.     }

  780. 

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

  782.     {

  783.         return decode_sequence_header_adv(v, gb);

  784.     }

  785.     else

  786.     {

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

  788.         if (v->res_sm)

  789.         {

  790.             av_log(avctx, AV_LOG_ERROR,

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

  792.             return -1;

  793.         }

  794.     }

  795. 

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

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

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

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

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

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

  802.     {

  803.         av_log(avctx, AV_LOG_ERROR,

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

  805.     }

  806. 

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

  808.     if (v->res_x8)

  809.     {

  810.         av_log(avctx, AV_LOG_ERROR,

  811.                "1 for reserved RES_X8 is forbidden\n");

  812.         //return -1;

  813.     }

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

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

  816.     if (!v->res_fasttx)

  817.     {

  818.         av_log(avctx, AV_LOG_ERROR,

  819.                "0 for reserved RES_FASTTX is forbidden\n");

  820.         //return -1;

  821.     }

  822. 

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

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

  825.     {

  826.         av_log(avctx, AV_LOG_ERROR,

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

  828.         return -1;

  829.     }

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

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

  832.     {

  833.         av_log(avctx, AV_LOG_ERROR,

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

  835.         return -1;

  836.     }

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

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

  839. 

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

  841.     if (v->res_transtab)

  842.     {

  843.         av_log(avctx, AV_LOG_ERROR,

  844.                "1 for reserved RES_TRANSTAB is forbidden\n");

  845.         return -1;

  846.     }

  847. 

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

  849. 

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

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

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

  853.     {

  854.         av_log(avctx, AV_LOG_INFO,

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

  856.     }

  857. 

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

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

  860. 

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

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

  863.     if (!v->res_rtm_flag)

  864.     {

  865. //            av_log(avctx, AV_LOG_ERROR,

  866. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  867.         av_log(avctx, AV_LOG_ERROR,

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

  869.         //return -1;

  870.     }

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

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

  873.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  882.                );

  883.     return 0;

  884. }

  885. 

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

  887. {

  888.     v->res_rtm_flag = 1;

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

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

  891.     {

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

  893.     }

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

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

  896.     {

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

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

  899.         return -1;

  900.     }

  901. 

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

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

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

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

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

  907. 

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

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

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

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

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

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

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

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

  916.     skip_bits1(gb); // reserved

  917. 

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

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

  920. 

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

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

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

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

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

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

  927.                v->tfcntrflag, v->finterpflag

  928.                );

  929. 

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

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

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

  933.         return -1;

  934.     }

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

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

  937.         int w, h, ar = 0;

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

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

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

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

  942.         if(get_bits1(gb))

  943.             ar = get_bits(gb, 4);

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

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

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

  947.             w = get_bits(gb, 8);

  948.             h = get_bits(gb, 8);

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

  950.         }

  951. 

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

  953.             if(get_bits1(gb)) {

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

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

  956.             } else {

  957.                 int nr, dr;

  958.                 nr = get_bits(gb, 8);

  959.                 dr = get_bits(gb, 4);

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

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

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

  963.                 }

  964.             }

  965.         }

  966. 

  967.         if(get_bits1(gb)){

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

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

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

  971.         }

  972.     }

  973. 

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

  975.     if(v->hrd_param_flag) {

  976.         int i;

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

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

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

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

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

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

  983.         }

  984.     }

  985.     return 0;

  986. }

  987. 

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

  989. {

  990.     VC1Context *v = avctx->priv_data;

  991.     int i, blink, clentry, refdist;

  992. 

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

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

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

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

  997.     refdist = get_bits1(gb); // refdist flag

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

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

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

  1001.     v->dquant = get_bits(gb, 2);

  1002.     v->vstransform = get_bits1(gb);

  1003.     v->overlap = get_bits1(gb);

  1004.     v->quantizer_mode = get_bits(gb, 2);

  1005. 

  1006.     if(v->hrd_param_flag){

  1007.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1008.             skip_bits(gb, 8); //hrd_full[n]

  1009.         }

  1010.     }

  1011. 

  1012.     if(get_bits1(gb)){

  1013.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1014.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1015.     }

  1016.     if(v->extended_mv)

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

  1018.     if(get_bits1(gb)) {

  1019.         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");

  1020.         skip_bits(gb, 3); // Y range, ignored for now

  1021.     }

  1022.     if(get_bits1(gb)) {

  1023.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1024.         skip_bits(gb, 3); // UV range, ignored for now

  1025.     }

  1026. 

  1027.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1028.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1029.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1030.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1031.         blink, clentry, v->panscanflag, refdist, v->s.loop_filter,

  1032.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1033. 

  1034.     return 0;

  1035. }

  1036. 

  1037. static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1038. {

  1039.     int pqindex, lowquant, status;

  1040. 

  1041.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1042.     skip_bits(gb, 2); //framecnt unused

  1043.     v->rangeredfrm = 0;

  1044.     if (v->rangered) v->rangeredfrm = get_bits1(gb);

  1045.     v->s.pict_type = get_bits1(gb);

  1046.     if (v->s.avctx->max_b_frames) {

  1047.         if (!v->s.pict_type) {

  1048.             if (get_bits1(gb)) v->s.pict_type = I_TYPE;

  1049.             else v->s.pict_type = B_TYPE;

  1050.         } else v->s.pict_type = P_TYPE;

  1051.     } else v->s.pict_type = v->s.pict_type ? P_TYPE : I_TYPE;

  1052. 

  1053.     v->bi_type = 0;

  1054.     if(v->s.pict_type == B_TYPE) {

  1055.         v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1056.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction];

  1057.         if(v->bfraction == 0) {

  1058.             v->s.pict_type = BI_TYPE;

  1059.         }

  1060.     }

  1061.     if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1062.         skip_bits(gb, 7); // skip buffer fullness

  1063. 

  1064.     /* calculate RND */

  1065.     if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1066.         v->rnd = 1;

  1067.     if(v->s.pict_type == P_TYPE)

  1068.         v->rnd ^= 1;

  1069. 

  1070.     /* Quantizer stuff */

  1071.     pqindex = get_bits(gb, 5);

  1072.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1073.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1074.     else

  1075.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1076. 

  1077.     v->pquantizer = 1;

  1078.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1079.         v->pquantizer = pqindex < 9;

  1080.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1081.         v->pquantizer = 0;

  1082.     v->pqindex = pqindex;

  1083.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1084.     else v->halfpq = 0;

  1085.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

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

  1087.     v->dquantfrm = 0;

  1088.     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);

  1089.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1090.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1091.     v->range_x = 1 << (v->k_x - 1);

  1092.     v->range_y = 1 << (v->k_y - 1);

  1093.     if (v->profile == PROFILE_ADVANCED)

  1094.     {

  1095.         if (v->postprocflag) v->postproc = get_bits1(gb);

  1096.     }

  1097.     else

  1098.         if (v->multires && v->s.pict_type != B_TYPE) v->respic = get_bits(gb, 2);

  1099. 

  1100.     if(v->res_x8 && (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)){

  1101.         if(get_bits1(gb))return -1;

  1102.     }

  1103. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1104. //        (v->s.pict_type == P_TYPE) ? 'P' : ((v->s.pict_type == I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1105. 

  1106.     if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;

  1107. 

  1108.     switch(v->s.pict_type) {

  1109.     case P_TYPE:

  1110.         if (v->pq < 5) v->tt_index = 0;

  1111.         else if(v->pq < 13) v->tt_index = 1;

  1112.         else v->tt_index = 2;

  1113. 

  1114.         lowquant = (v->pq > 12) ? 0 : 1;

  1115.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1116.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1117.         {

  1118.             int scale, shift, i;

  1119.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1120.             v->lumscale = get_bits(gb, 6);

  1121.             v->lumshift = get_bits(gb, 6);

  1122.             v->use_ic = 1;

  1123.             /* fill lookup tables for intensity compensation */

  1124.             if(!v->lumscale) {

  1125.                 scale = -64;

  1126.                 shift = (255 - v->lumshift * 2) << 6;

  1127.                 if(v->lumshift > 31)

  1128.                     shift += 128 << 6;

  1129.             } else {

  1130.                 scale = v->lumscale + 32;

  1131.                 if(v->lumshift > 31)

  1132.                     shift = (v->lumshift - 64) << 6;

  1133.                 else

  1134.                     shift = v->lumshift << 6;

  1135.             }

  1136.             for(i = 0; i < 256; i++) {

  1137.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1138.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1139.             }

  1140.         }

  1141.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1142.             v->s.quarter_sample = 0;

  1143.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1144.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1145.                 v->s.quarter_sample = 0;

  1146.             else

  1147.                 v->s.quarter_sample = 1;

  1148.         } else

  1149.             v->s.quarter_sample = 1;

  1150.         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));

  1151. 

  1152.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1153.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1154.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1155.         {

  1156.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1157.             if (status < 0) return -1;

  1158.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1159.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1160.         } else {

  1161.             v->mv_type_is_raw = 0;

  1162.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1163.         }

  1164.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1165.         if (status < 0) return -1;

  1166.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1167.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1168. 

  1169.         /* Hopefully this is correct for P frames */

  1170.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1171.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1172. 

  1173.         if (v->dquant)

  1174.         {

  1175.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1176.             vop_dquant_decoding(v);

  1177.         }

  1178. 

  1179.         v->ttfrm = 0; //FIXME Is that so ?

  1180.         if (v->vstransform)

  1181.         {

  1182.             v->ttmbf = get_bits1(gb);

  1183.             if (v->ttmbf)

  1184.             {

  1185.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1186.             }

  1187.         } else {

  1188.             v->ttmbf = 1;

  1189.             v->ttfrm = TT_8X8;

  1190.         }

  1191.         break;

  1192.     case B_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 = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1199.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1200.         v->s.mspel = v->s.quarter_sample;

  1201. 

  1202.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1203.         if (status < 0) return -1;

  1204.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1205.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1206.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1207.         if (status < 0) return -1;

  1208.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1209.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1210. 

  1211.         v->s.mv_table_index = get_bits(gb, 2);

  1212.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1213. 

  1214.         if (v->dquant)

  1215.         {

  1216.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1217.             vop_dquant_decoding(v);

  1218.         }

  1219. 

  1220.         v->ttfrm = 0;

  1221.         if (v->vstransform)

  1222.         {

  1223.             v->ttmbf = get_bits1(gb);

  1224.             if (v->ttmbf)

  1225.             {

  1226.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1227.             }

  1228.         } else {

  1229.             v->ttmbf = 1;

  1230.             v->ttfrm = TT_8X8;

  1231.         }

  1232.         break;

  1233.     }

  1234. 

  1235.     /* AC Syntax */

  1236.     v->c_ac_table_index = decode012(gb);

  1237.     if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1238.     {

  1239.         v->y_ac_table_index = decode012(gb);

  1240.     }

  1241.     /* DC Syntax */

  1242.     v->s.dc_table_index = get_bits1(gb);

  1243. 

  1244.     if(v->s.pict_type == BI_TYPE) {

  1245.         v->s.pict_type = B_TYPE;

  1246.         v->bi_type = 1;

  1247.     }

  1248.     return 0;

  1249. }

  1250. 

  1251. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1252. {

  1253.     int pqindex, lowquant;

  1254.     int status;

  1255. 

  1256.     v->p_frame_skipped = 0;

  1257. 

  1258.     if(v->interlace){

  1259.         v->fcm = decode012(gb);

  1260.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1261.     }

  1262.     switch(get_unary(gb, 0, 4)) {

  1263.     case 0:

  1264.         v->s.pict_type = P_TYPE;

  1265.         break;

  1266.     case 1:

  1267.         v->s.pict_type = B_TYPE;

  1268.         break;

  1269.     case 2:

  1270.         v->s.pict_type = I_TYPE;

  1271.         break;

  1272.     case 3:

  1273.         v->s.pict_type = BI_TYPE;

  1274.         break;

  1275.     case 4:

  1276.         v->s.pict_type = P_TYPE; // skipped pic

  1277.         v->p_frame_skipped = 1;

  1278.         return 0;

  1279.     }

  1280.     if(v->tfcntrflag)

  1281.         skip_bits(gb, 8);

  1282.     if(v->broadcast) {

  1283.         if(!v->interlace || v->psf) {

  1284.             v->rptfrm = get_bits(gb, 2);

  1285.         } else {

  1286.             v->tff = get_bits1(gb);

  1287.             v->rptfrm = get_bits1(gb);

  1288.         }

  1289.     }

  1290.     if(v->panscanflag) {

  1291.         //...

  1292.     }

  1293.     v->rnd = get_bits1(gb);

  1294.     if(v->interlace)

  1295.         v->uvsamp = get_bits1(gb);

  1296.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1297.     if(v->s.pict_type == B_TYPE) {

  1298.         v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1299.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction];

  1300.         if(v->bfraction == 0) {

  1301.             v->s.pict_type = BI_TYPE; /* XXX: should not happen here */

  1302.         }

  1303.     }

  1304.     pqindex = get_bits(gb, 5);

  1305.     v->pqindex = pqindex;

  1306.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1307.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1308.     else

  1309.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1310. 

  1311.     v->pquantizer = 1;

  1312.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1313.         v->pquantizer = pqindex < 9;

  1314.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1315.         v->pquantizer = 0;

  1316.     v->pqindex = pqindex;

  1317.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1318.     else v->halfpq = 0;

  1319.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1320.         v->pquantizer = get_bits1(gb);

  1321. 

  1322.     if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;

  1323. 

  1324.     switch(v->s.pict_type) {

  1325.     case I_TYPE:

  1326.     case BI_TYPE:

  1327.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1328.         if (status < 0) return -1;

  1329.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1330.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1331.         v->condover = CONDOVER_NONE;

  1332.         if(v->overlap && v->pq <= 8) {

  1333.             v->condover = decode012(gb);

  1334.             if(v->condover == CONDOVER_SELECT) {

  1335.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1336.                 if (status < 0) return -1;

  1337.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1338.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1339.             }

  1340.         }

  1341.         break;

  1342.     case P_TYPE:

  1343.         if(v->postprocflag)

  1344.             v->postproc = get_bits1(gb);

  1345.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1346.         else v->mvrange = 0;

  1347.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1348.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1349.         v->range_x = 1 << (v->k_x - 1);

  1350.         v->range_y = 1 << (v->k_y - 1);

  1351. 

  1352.         if (v->pq < 5) v->tt_index = 0;

  1353.         else if(v->pq < 13) v->tt_index = 1;

  1354.         else v->tt_index = 2;

  1355. 

  1356.         lowquant = (v->pq > 12) ? 0 : 1;

  1357.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1358.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1359.         {

  1360.             int scale, shift, i;

  1361.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1362.             v->lumscale = get_bits(gb, 6);

  1363.             v->lumshift = get_bits(gb, 6);

  1364.             /* fill lookup tables for intensity compensation */

  1365.             if(!v->lumscale) {

  1366.                 scale = -64;

  1367.                 shift = (255 - v->lumshift * 2) << 6;

  1368.                 if(v->lumshift > 31)

  1369.                     shift += 128 << 6;

  1370.             } else {

  1371.                 scale = v->lumscale + 32;

  1372.                 if(v->lumshift > 31)

  1373.                     shift = (v->lumshift - 64) << 6;

  1374.                 else

  1375.                     shift = v->lumshift << 6;

  1376.             }

  1377.             for(i = 0; i < 256; i++) {

  1378.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1379.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1380.             }

  1381.             v->use_ic = 1;

  1382.         }

  1383.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1384.             v->s.quarter_sample = 0;

  1385.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1386.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1387.                 v->s.quarter_sample = 0;

  1388.             else

  1389.                 v->s.quarter_sample = 1;

  1390.         } else

  1391.             v->s.quarter_sample = 1;

  1392.         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));

  1393. 

  1394.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1395.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1396.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1397.         {

  1398.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1399.             if (status < 0) return -1;

  1400.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1401.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1402.         } else {

  1403.             v->mv_type_is_raw = 0;

  1404.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1405.         }

  1406.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1407.         if (status < 0) return -1;

  1408.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1409.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1410. 

  1411.         /* Hopefully this is correct for P frames */

  1412.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1413.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1414.         if (v->dquant)

  1415.         {

  1416.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1417.             vop_dquant_decoding(v);

  1418.         }

  1419. 

  1420.         v->ttfrm = 0; //FIXME Is that so ?

  1421.         if (v->vstransform)

  1422.         {

  1423.             v->ttmbf = get_bits1(gb);

  1424.             if (v->ttmbf)

  1425.             {

  1426.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1427.             }

  1428.         } else {

  1429.             v->ttmbf = 1;

  1430.             v->ttfrm = TT_8X8;

  1431.         }

  1432.         break;

  1433.     case B_TYPE:

  1434.         if(v->postprocflag)

  1435.             v->postproc = get_bits1(gb);

  1436.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1437.         else v->mvrange = 0;

  1438.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1439.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1440.         v->range_x = 1 << (v->k_x - 1);

  1441.         v->range_y = 1 << (v->k_y - 1);

  1442. 

  1443.         if (v->pq < 5) v->tt_index = 0;

  1444.         else if(v->pq < 13) v->tt_index = 1;

  1445.         else v->tt_index = 2;

  1446. 

  1447.         lowquant = (v->pq > 12) ? 0 : 1;

  1448.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1449.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1450.         v->s.mspel = v->s.quarter_sample;

  1451. 

  1452.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1453.         if (status < 0) return -1;

  1454.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1455.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1456.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1457.         if (status < 0) return -1;

  1458.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1459.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1460. 

  1461.         v->s.mv_table_index = get_bits(gb, 2);

  1462.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1463. 

  1464.         if (v->dquant)

  1465.         {

  1466.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1467.             vop_dquant_decoding(v);

  1468.         }

  1469. 

  1470.         v->ttfrm = 0;

  1471.         if (v->vstransform)

  1472.         {

  1473.             v->ttmbf = get_bits1(gb);

  1474.             if (v->ttmbf)

  1475.             {

  1476.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1477.             }

  1478.         } else {

  1479.             v->ttmbf = 1;

  1480.             v->ttfrm = TT_8X8;

  1481.         }

  1482.         break;

  1483.     }

  1484. 

  1485.     /* AC Syntax */

  1486.     v->c_ac_table_index = decode012(gb);

  1487.     if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1488.     {

  1489.         v->y_ac_table_index = decode012(gb);

  1490.     }

  1491.     /* DC Syntax */

  1492.     v->s.dc_table_index = get_bits1(gb);

  1493.     if ((v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE) && v->dquant) {

  1494.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1495.         vop_dquant_decoding(v);

  1496.     }

  1497. 

  1498.     v->bi_type = 0;

  1499.     if(v->s.pict_type == BI_TYPE) {

  1500.         v->s.pict_type = B_TYPE;

  1501.         v->bi_type = 1;

  1502.     }

  1503.     return 0;

  1504. }

  1505. 

  1506. /***********************************************************************/

  1507. /**

  1508.  * @defgroup block VC-1 Block-level functions

  1509.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1510.  * @{

  1511.  */

  1512. 

  1513. /**

  1514.  * @def GET_MQUANT

  1515.  * @brief Get macroblock-level quantizer scale

  1516.  */

  1517. #define GET_MQUANT()                                           \

  1518.   if (v->dquantfrm)                                            \

  1519.   {                                                            \

  1520.     int edges = 0;                                             \

  1521.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1522.     {                                                          \

  1523.       if (v->dqbilevel)                                        \

  1524.       {                                                        \

  1525.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1526.       }                                                        \

  1527.       else                                                     \

  1528.       {                                                        \

  1529.         mqdiff = get_bits(gb, 3);                              \

  1530.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1531.         else mquant = get_bits(gb, 5);                         \

  1532.       }                                                        \

  1533.     }                                                          \

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

  1535.         edges = 1 << v->dqsbedge;                              \

  1536.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1537.         edges = (3 << v->dqsbedge) % 15;                       \

  1538.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1539.         edges = 15;                                            \

  1540.     if((edges&1) && !s->mb_x)                                  \

  1541.         mquant = v->altpq;                                     \

  1542.     if((edges&2) && s->first_slice_line)                       \

  1543.         mquant = v->altpq;                                     \

  1544.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1545.         mquant = v->altpq;                                     \

  1546.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1547.         mquant = v->altpq;                                     \

  1548.   }

  1549. 

  1550. /**

  1551.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1552.  * @brief Get MV differentials

  1553.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1554.  * @param _dmv_x Horizontal differential for decoded MV

  1555.  * @param _dmv_y Vertical differential for decoded MV

  1556.  */

  1557. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1558.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1559.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1560.   if (index > 36)                                                   \

  1561.   {                                                                 \

  1562.     mb_has_coeffs = 1;                                              \

  1563.     index -= 37;                                                    \

  1564.   }                                                                 \

  1565.   else mb_has_coeffs = 0;                                           \

  1566.   s->mb_intra = 0;                                                  \

  1567.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1568.   else if (index == 35)                                             \

  1569.   {                                                                 \

  1570.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1571.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1572.   }                                                                 \

  1573.   else if (index == 36)                                             \

  1574.   {                                                                 \

  1575.     _dmv_x = 0;                                                     \

  1576.     _dmv_y = 0;                                                     \

  1577.     s->mb_intra = 1;                                                \

  1578.   }                                                                 \

  1579.   else                                                              \

  1580.   {                                                                 \

  1581.     index1 = index%6;                                               \

  1582.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1583.     else                                   val = 0;                 \

  1584.     if(size_table[index1] - val > 0)                                \

  1585.         val = get_bits(gb, size_table[index1] - val);               \

  1586.     else                                   val = 0;                 \

  1587.     sign = 0 - (val&1);                                             \

  1588.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1589.                                                                     \

  1590.     index1 = index/6;                                               \

  1591.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1592.     else                                   val = 0;                 \

  1593.     if(size_table[index1] - val > 0)                                \

  1594.         val = get_bits(gb, size_table[index1] - val);               \

  1595.     else                                   val = 0;                 \

  1596.     sign = 0 - (val&1);                                             \

  1597.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1598.   }

  1599. 

  1600. /** Predict and set motion vector

  1601.  */

  1602. 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)

  1603. {

  1604.     int xy, wrap, off = 0;

  1605.     int16_t *A, *B, *C;

  1606.     int px, py;

  1607.     int sum;

  1608. 

  1609.     /* scale MV difference to be quad-pel */

  1610.     dmv_x <<= 1 - s->quarter_sample;

  1611.     dmv_y <<= 1 - s->quarter_sample;

  1612. 

  1613.     wrap = s->b8_stride;

  1614.     xy = s->block_index[n];

  1615. 

  1616.     if(s->mb_intra){

  1617.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1618.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

  1619.         s->current_picture.motion_val[1][xy][0] = 0;

  1620.         s->current_picture.motion_val[1][xy][1] = 0;

  1621.         if(mv1) { /* duplicate motion data for 1-MV block */

  1622.             s->current_picture.motion_val[0][xy + 1][0] = 0;

  1623.             s->current_picture.motion_val[0][xy + 1][1] = 0;

  1624.             s->current_picture.motion_val[0][xy + wrap][0] = 0;

  1625.             s->current_picture.motion_val[0][xy + wrap][1] = 0;

  1626.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  1627.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  1628.             s->current_picture.motion_val[1][xy + 1][0] = 0;

  1629.             s->current_picture.motion_val[1][xy + 1][1] = 0;

  1630.             s->current_picture.motion_val[1][xy + wrap][0] = 0;

  1631.             s->current_picture.motion_val[1][xy + wrap][1] = 0;

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

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

  1634.         }

  1635.         return;

  1636.     }

  1637. 

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

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

  1640.     if(mv1)

  1641.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1642.     else {

  1643.         //in 4-MV mode different blocks have different B predictor position

  1644.         switch(n){

  1645.         case 0:

  1646.             off = (s->mb_x > 0) ? -1 : 1;

  1647.             break;

  1648.         case 1:

  1649.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1650.             break;

  1651.         case 2:

  1652.             off = 1;

  1653.             break;

  1654.         case 3:

  1655.             off = -1;

  1656.         }

  1657.     }

  1658.     B = s->current_picture.motion_val[0][xy - wrap + off];

  1659. 

  1660.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1661.         if(s->mb_width == 1) {

  1662.             px = A[0];

  1663.             py = A[1];

  1664.         } else {

  1665.             px = mid_pred(A[0], B[0], C[0]);

  1666.             py = mid_pred(A[1], B[1], C[1]);

  1667.         }

  1668.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1669.         px = C[0];

  1670.         py = C[1];

  1671.     } else {

  1672.         px = py = 0;

  1673.     }

  1674.     /* Pullback MV as specified in 8.3.5.3.4 */

  1675.     {

  1676.         int qx, qy, X, Y;

  1677.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1678.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1679.         X = (s->mb_width << 6) - 4;

  1680.         Y = (s->mb_height << 6) - 4;

  1681.         if(mv1) {

  1682.             if(qx + px < -60) px = -60 - qx;

  1683.             if(qy + py < -60) py = -60 - qy;

  1684.         } else {

  1685.             if(qx + px < -28) px = -28 - qx;

  1686.             if(qy + py < -28) py = -28 - qy;

  1687.         }

  1688.         if(qx + px > X) px = X - qx;

  1689.         if(qy + py > Y) py = Y - qy;

  1690.     }

  1691.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1692.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1693.         if(is_intra[xy - wrap])

  1694.             sum = FFABS(px) + FFABS(py);

  1695.         else

  1696.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1697.         if(sum > 32) {

  1698.             if(get_bits1(&s->gb)) {

  1699.                 px = A[0];

  1700.                 py = A[1];

  1701.             } else {

  1702.                 px = C[0];

  1703.                 py = C[1];

  1704.             }

  1705.         } else {

  1706.             if(is_intra[xy - 1])

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

  1708.             else

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

  1710.             if(sum > 32) {

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

  1712.                     px = A[0];

  1713.                     py = A[1];

  1714.                 } else {

  1715.                     px = C[0];

  1716.                     py = C[1];

  1717.                 }

  1718.             }

  1719.         }

  1720.     }

  1721.     /* store MV using signed modulus of MV range defined in 4.11 */

  1722.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1723.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1724.     if(mv1) { /* duplicate motion data for 1-MV block */

  1725.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  1726.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  1727.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1728.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1729.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1730.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1731.     }

  1732. }

  1733. 

  1734. /** Motion compensation for direct or interpolated blocks in B-frames

  1735.  */

  1736. static void vc1_interp_mc(VC1Context *v)

  1737. {

  1738.     MpegEncContext *s = &v->s;

  1739.     DSPContext *dsp = &v->s.dsp;

  1740.     uint8_t *srcY, *srcU, *srcV;

  1741.     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1742. 

  1743.     if(!v->s.next_picture.data[0])return;

  1744. 

  1745.     mx = s->mv[1][0][0];

  1746.     my = s->mv[1][0][1];

  1747.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1748.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1749.     if(v->fastuvmc) {

  1750.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1751.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1752.     }

  1753.     srcY = s->next_picture.data[0];

  1754.     srcU = s->next_picture.data[1];

  1755.     srcV = s->next_picture.data[2];

  1756. 

  1757.     src_x = s->mb_x * 16 + (mx >> 2);

  1758.     src_y = s->mb_y * 16 + (my >> 2);

  1759.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1760.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1761. 

  1762.     if(v->profile != PROFILE_ADVANCED){

  1763.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1764.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1765.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1766.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1767.     }else{

  1768.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1769.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1770.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1771.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1772.     }

  1773. 

  1774.     srcY += src_y * s->linesize + src_x;

  1775.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1776.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1777. 

  1778.     /* for grayscale we should not try to read from unknown area */

  1779.     if(s->flags & CODEC_FLAG_GRAY) {

  1780.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1781.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1782.     }

  1783. 

  1784.     if(v->rangeredfrm

  1785.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  1786.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  1787.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1788. 

  1789.         srcY -= s->mspel * (1 + s->linesize);

  1790.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1791.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1792.         srcY = s->edge_emu_buffer;

  1793.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1794.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1795.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1796.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1797.         srcU = uvbuf;

  1798.         srcV = uvbuf + 16;

  1799.         /* if we deal with range reduction we need to scale source blocks */

  1800.         if(v->rangeredfrm) {

  1801.             int i, j;

  1802.             uint8_t *src, *src2;

  1803. 

  1804.             src = srcY;

  1805.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1806.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1807.                 src += s->linesize;

  1808.             }

  1809.             src = srcU; src2 = srcV;

  1810.             for(j = 0; j < 9; j++) {

  1811.                 for(i = 0; i < 9; i++) {

  1812.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1813.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1814.                 }

  1815.                 src += s->uvlinesize;

  1816.                 src2 += s->uvlinesize;

  1817.             }

  1818.         }

  1819.         srcY += s->mspel * (1 + s->linesize);

  1820.     }

  1821. 

  1822.     mx >>= 1;

  1823.     my >>= 1;

  1824.     dxy = ((my & 1) << 1) | (mx & 1);

  1825. 

  1826.     dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1827. 

  1828.     if(s->flags & CODEC_FLAG_GRAY) return;

  1829.     /* Chroma MC always uses qpel blilinear */

  1830.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  1831.     uvmx = (uvmx&3)<<1;

  1832.     uvmy = (uvmy&3)<<1;

  1833.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1834.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1835. }

  1836. 

  1837. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1838. {

  1839.     int n = bfrac;

  1840. 

  1841. #if B_FRACTION_DEN==256

  1842.     if(inv)

  1843.         n -= 256;

  1844.     if(!qs)

  1845.         return 2 * ((value * n + 255) >> 9);

  1846.     return (value * n + 128) >> 8;

  1847. #else

  1848.     if(inv)

  1849.         n -= B_FRACTION_DEN;

  1850.     if(!qs)

  1851.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1852.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1853. #endif

  1854. }

  1855. 

  1856. /** Reconstruct motion vector for B-frame and do motion compensation

  1857.  */

  1858. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1859. {

  1860.     if(v->use_ic) {

  1861.         v->mv_mode2 = v->mv_mode;

  1862.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1863.     }

  1864.     if(direct) {

  1865.         vc1_mc_1mv(v, 0);

  1866.         vc1_interp_mc(v);

  1867.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1868.         return;

  1869.     }

  1870.     if(mode == BMV_TYPE_INTERPOLATED) {

  1871.         vc1_mc_1mv(v, 0);

  1872.         vc1_interp_mc(v);

  1873.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1874.         return;

  1875.     }

  1876. 

  1877.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1878.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1879.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1880. }

  1881. 

  1882. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1883. {

  1884.     MpegEncContext *s = &v->s;

  1885.     int xy, wrap, off = 0;

  1886.     int16_t *A, *B, *C;

  1887.     int px, py;

  1888.     int sum;

  1889.     int r_x, r_y;

  1890.     const uint8_t *is_intra = v->mb_type[0];

  1891. 

  1892.     r_x = v->range_x;

  1893.     r_y = v->range_y;

  1894.     /* scale MV difference to be quad-pel */

  1895.     dmv_x[0] <<= 1 - s->quarter_sample;

  1896.     dmv_y[0] <<= 1 - s->quarter_sample;

  1897.     dmv_x[1] <<= 1 - s->quarter_sample;

  1898.     dmv_y[1] <<= 1 - s->quarter_sample;

  1899. 

  1900.     wrap = s->b8_stride;

  1901.     xy = s->block_index[0];

  1902. 

  1903.     if(s->mb_intra) {

  1904.         s->current_picture.motion_val[0][xy][0] =

  1905.         s->current_picture.motion_val[0][xy][1] =

  1906.         s->current_picture.motion_val[1][xy][0] =

  1907.         s->current_picture.motion_val[1][xy][1] = 0;

  1908.         return;

  1909.     }

  1910.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  1911.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  1912.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  1913.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  1914. 

  1915.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  1916.     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));

  1917.     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));

  1918.     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));

  1919.     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));

  1920.     if(direct) {

  1921.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  1922.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  1923.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  1924.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  1925.         return;

  1926.     }

  1927. 

  1928.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  1929.         C = s->current_picture.motion_val[0][xy - 2];

  1930.         A = s->current_picture.motion_val[0][xy - wrap*2];

  1931.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1932.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  1933. 

  1934.         if(!s->mb_x) C[0] = C[1] = 0;

  1935.         if(!s->first_slice_line) { // predictor A is not out of bounds

  1936.             if(s->mb_width == 1) {

  1937.                 px = A[0];

  1938.                 py = A[1];

  1939.             } else {

  1940.                 px = mid_pred(A[0], B[0], C[0]);

  1941.                 py = mid_pred(A[1], B[1], C[1]);

  1942.             }

  1943.         } else if(s->mb_x) { // predictor C is not out of bounds

  1944.             px = C[0];

  1945.             py = C[1];

  1946.         } else {

  1947.             px = py = 0;

  1948.         }

  1949.         /* Pullback MV as specified in 8.3.5.3.4 */

  1950.         {

  1951.             int qx, qy, X, Y;

  1952.             if(v->profile < PROFILE_ADVANCED) {

  1953.                 qx = (s->mb_x << 5);

  1954.                 qy = (s->mb_y << 5);

  1955.                 X = (s->mb_width << 5) - 4;

  1956.                 Y = (s->mb_height << 5) - 4;

  1957.                 if(qx + px < -28) px = -28 - qx;

  1958.                 if(qy + py < -28) py = -28 - qy;

  1959.                 if(qx + px > X) px = X - qx;

  1960.                 if(qy + py > Y) py = Y - qy;

  1961.             } else {

  1962.                 qx = (s->mb_x << 6);

  1963.                 qy = (s->mb_y << 6);

  1964.                 X = (s->mb_width << 6) - 4;

  1965.                 Y = (s->mb_height << 6) - 4;

  1966.                 if(qx + px < -60) px = -60 - qx;

  1967.                 if(qy + py < -60) py = -60 - qy;

  1968.                 if(qx + px > X) px = X - qx;

  1969.                 if(qy + py > Y) py = Y - qy;

  1970.             }

  1971.         }

  1972.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1973.         if(0 && !s->first_slice_line && s->mb_x) {

  1974.             if(is_intra[xy - wrap])

  1975.                 sum = FFABS(px) + FFABS(py);

  1976.             else

  1977.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1978.             if(sum > 32) {

  1979.                 if(get_bits1(&s->gb)) {

  1980.                     px = A[0];

  1981.                     py = A[1];

  1982.                 } else {

  1983.                     px = C[0];

  1984.                     py = C[1];

  1985.                 }

  1986.             } else {

  1987.                 if(is_intra[xy - 2])

  1988.                     sum = FFABS(px) + FFABS(py);

  1989.                 else

  1990.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1991.                 if(sum > 32) {

  1992.                     if(get_bits1(&s->gb)) {

  1993.                         px = A[0];

  1994.                         py = A[1];

  1995.                     } else {

  1996.                         px = C[0];

  1997.                         py = C[1];

  1998.                     }

  1999.                 }

  2000.             }

  2001.         }

  2002.         /* store MV using signed modulus of MV range defined in 4.11 */

  2003.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2004.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2005.     }

  2006.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2007.         C = s->current_picture.motion_val[1][xy - 2];

  2008.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2009.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2010.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2011. 

  2012.         if(!s->mb_x) C[0] = C[1] = 0;

  2013.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2014.             if(s->mb_width == 1) {

  2015.                 px = A[0];

  2016.                 py = A[1];

  2017.             } else {

  2018.                 px = mid_pred(A[0], B[0], C[0]);

  2019.                 py = mid_pred(A[1], B[1], C[1]);

  2020.             }

  2021.         } else if(s->mb_x) { // predictor C is not out of bounds

  2022.             px = C[0];

  2023.             py = C[1];

  2024.         } else {

  2025.             px = py = 0;

  2026.         }

  2027.         /* Pullback MV as specified in 8.3.5.3.4 */

  2028.         {

  2029.             int qx, qy, X, Y;

  2030.             if(v->profile < PROFILE_ADVANCED) {

  2031.                 qx = (s->mb_x << 5);

  2032.                 qy = (s->mb_y << 5);

  2033.                 X = (s->mb_width << 5) - 4;

  2034.                 Y = (s->mb_height << 5) - 4;

  2035.                 if(qx + px < -28) px = -28 - qx;

  2036.                 if(qy + py < -28) py = -28 - qy;

  2037.                 if(qx + px > X) px = X - qx;

  2038.                 if(qy + py > Y) py = Y - qy;

  2039.             } else {

  2040.                 qx = (s->mb_x << 6);

  2041.                 qy = (s->mb_y << 6);

  2042.                 X = (s->mb_width << 6) - 4;

  2043.                 Y = (s->mb_height << 6) - 4;

  2044.                 if(qx + px < -60) px = -60 - qx;

  2045.                 if(qy + py < -60) py = -60 - qy;

  2046.                 if(qx + px > X) px = X - qx;

  2047.                 if(qy + py > Y) py = Y - qy;

  2048.             }

  2049.         }

  2050.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2051.         if(0 && !s->first_slice_line && s->mb_x) {

  2052.             if(is_intra[xy - wrap])

  2053.                 sum = FFABS(px) + FFABS(py);

  2054.             else

  2055.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2056.             if(sum > 32) {

  2057.                 if(get_bits1(&s->gb)) {

  2058.                     px = A[0];

  2059.                     py = A[1];

  2060.                 } else {

  2061.                     px = C[0];

  2062.                     py = C[1];

  2063.                 }

  2064.             } else {

  2065.                 if(is_intra[xy - 2])

  2066.                     sum = FFABS(px) + FFABS(py);

  2067.                 else

  2068.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2069.                 if(sum > 32) {

  2070.                     if(get_bits1(&s->gb)) {

  2071.                         px = A[0];

  2072.                         py = A[1];

  2073.                     } else {

  2074.                         px = C[0];

  2075.                         py = C[1];

  2076.                     }

  2077.                 }

  2078.             }

  2079.         }

  2080.         /* store MV using signed modulus of MV range defined in 4.11 */

  2081. 

  2082.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2083.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2084.     }

  2085.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2086.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2087.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2088.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2089. }

  2090. 

  2091. /** Get predicted DC value for I-frames only

  2092.  * prediction dir: left=0, top=1

  2093.  * @param s MpegEncContext

  2094.  * @param[in] n block index in the current MB

  2095.  * @param dc_val_ptr Pointer to DC predictor

  2096.  * @param dir_ptr Prediction direction for use in AC prediction

  2097.  */

  2098. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2099.                               int16_t **dc_val_ptr, int *dir_ptr)

  2100. {

  2101.     int a, b, c, wrap, pred, scale;

  2102.     int16_t *dc_val;

  2103.     static const uint16_t dcpred[32] = {

  2104.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2105.          114,  102,   93,   85,   79,   73,   68,   64,

  2106.           60,   57,   54,   51,   49,   47,   45,   43,

  2107.           41,   39,   38,   37,   35,   34,   33

  2108.     };

  2109. 

  2110.     /* find prediction - wmv3_dc_scale always used here in fact */

  2111.     if (n < 4)     scale = s->y_dc_scale;

  2112.     else           scale = s->c_dc_scale;

  2113. 

  2114.     wrap = s->block_wrap[n];

  2115.     dc_val= s->dc_val[0] + s->block_index[n];

  2116. 

  2117.     /* B A

  2118.      * C X

  2119.      */

  2120.     c = dc_val[ - 1];

  2121.     b = dc_val[ - 1 - wrap];

  2122.     a = dc_val[ - wrap];

  2123. 

  2124.     if (pq < 9 || !overlap)

  2125.     {

  2126.         /* Set outer values */

  2127.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2128.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2129.     }

  2130.     else

  2131.     {

  2132.         /* Set outer values */

  2133.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2134.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2135.     }

  2136. 

  2137.     if (abs(a - b) <= abs(b - c)) {

  2138.         pred = c;

  2139.         *dir_ptr = 1;//left

  2140.     } else {

  2141.         pred = a;

  2142.         *dir_ptr = 0;//top

  2143.     }

  2144. 

  2145.     /* update predictor */

  2146.     *dc_val_ptr = &dc_val[0];

  2147.     return pred;

  2148. }

  2149. 

  2150. 

  2151. /** Get predicted DC value

  2152.  * prediction dir: left=0, top=1

  2153.  * @param s MpegEncContext

  2154.  * @param[in] n block index in the current MB

  2155.  * @param dc_val_ptr Pointer to DC predictor

  2156.  * @param dir_ptr Prediction direction for use in AC prediction

  2157.  */

  2158. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2159.                               int a_avail, int c_avail,

  2160.                               int16_t **dc_val_ptr, int *dir_ptr)

  2161. {

  2162.     int a, b, c, wrap, pred, scale;

  2163.     int16_t *dc_val;

  2164.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2165.     int q1, q2 = 0;

  2166. 

  2167.     /* find prediction - wmv3_dc_scale always used here in fact */

  2168.     if (n < 4)     scale = s->y_dc_scale;

  2169.     else           scale = s->c_dc_scale;

  2170. 

  2171.     wrap = s->block_wrap[n];

  2172.     dc_val= s->dc_val[0] + s->block_index[n];

  2173. 

  2174.     /* B A

  2175.      * C X

  2176.      */

  2177.     c = dc_val[ - 1];

  2178.     b = dc_val[ - 1 - wrap];

  2179.     a = dc_val[ - wrap];

  2180.     /* scale predictors if needed */

  2181.     q1 = s->current_picture.qscale_table[mb_pos];

  2182.     if(c_avail && (n!= 1 && n!=3)) {

  2183.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2184.         if(q2 && q2 != q1)

  2185.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2186.     }

  2187.     if(a_avail && (n!= 2 && n!=3)) {

  2188.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2189.         if(q2 && q2 != q1)

  2190.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2191.     }

  2192.     if(a_avail && c_avail && (n!=3)) {

  2193.         int off = mb_pos;

  2194.         if(n != 1) off--;

  2195.         if(n != 2) off -= s->mb_stride;

  2196.         q2 = s->current_picture.qscale_table[off];

  2197.         if(q2 && q2 != q1)

  2198.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2199.     }

  2200. 

  2201.     if(a_avail && c_avail) {

  2202.         if(abs(a - b) <= abs(b - c)) {

  2203.             pred = c;

  2204.             *dir_ptr = 1;//left

  2205.         } else {

  2206.             pred = a;

  2207.             *dir_ptr = 0;//top

  2208.         }

  2209.     } else if(a_avail) {

  2210.         pred = a;

  2211.         *dir_ptr = 0;//top

  2212.     } else if(c_avail) {

  2213.         pred = c;

  2214.         *dir_ptr = 1;//left

  2215.     } else {

  2216.         pred = 0;

  2217.         *dir_ptr = 1;//left

  2218.     }

  2219. 

  2220.     /* update predictor */

  2221.     *dc_val_ptr = &dc_val[0];

  2222.     return pred;

  2223. }

  2224. 

  2225. 

  2226. /**

  2227.  * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2228.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2229.  * @{

  2230.  */

  2231. 

  2232. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2233. {

  2234.     int xy, wrap, pred, a, b, c;

  2235. 

  2236.     xy = s->block_index[n];

  2237.     wrap = s->b8_stride;

  2238. 

  2239.     /* B C

  2240.      * A X

  2241.      */

  2242.     a = s->coded_block[xy - 1       ];

  2243.     b = s->coded_block[xy - 1 - wrap];

  2244.     c = s->coded_block[xy     - wrap];

  2245. 

  2246.     if (b == c) {

  2247.         pred = a;

  2248.     } else {

  2249.         pred = c;

  2250.     }

  2251. 

  2252.     /* store value */

  2253.     *coded_block_ptr = &s->coded_block[xy];

  2254. 

  2255.     return pred;

  2256. }

  2257. 

  2258. /**

  2259.  * Decode one AC coefficient

  2260.  * @param v The VC1 context

  2261.  * @param last Last coefficient

  2262.  * @param skip How much zero coefficients to skip

  2263.  * @param value Decoded AC coefficient value

  2264.  * @see 8.1.3.4

  2265.  */

  2266. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2267. {

  2268.     GetBitContext *gb = &v->s.gb;

  2269.     int index, escape, run = 0, level = 0, lst = 0;

  2270. 

  2271.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2272.     if (index != vc1_ac_sizes[codingset] - 1) {

  2273.         run = vc1_index_decode_table[codingset][index][0];

  2274.         level = vc1_index_decode_table[codingset][index][1];

  2275.         lst = index >= vc1_last_decode_table[codingset];

  2276.         if(get_bits1(gb))

  2277.             level = -level;

  2278.     } else {

  2279.         escape = decode210(gb);

  2280.         if (escape != 2) {

  2281.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2282.             run = vc1_index_decode_table[codingset][index][0];

  2283.             level = vc1_index_decode_table[codingset][index][1];

  2284.             lst = index >= vc1_last_decode_table[codingset];

  2285.             if(escape == 0) {

  2286.                 if(lst)

  2287.                     level += vc1_last_delta_level_table[codingset][run];

  2288.                 else

  2289.                     level += vc1_delta_level_table[codingset][run];

  2290.             } else {

  2291.                 if(lst)

  2292.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2293.                 else

  2294.                     run += vc1_delta_run_table[codingset][level] + 1;

  2295.             }

  2296.             if(get_bits1(gb))

  2297.                 level = -level;

  2298.         } else {

  2299.             int sign;

  2300.             lst = get_bits1(gb);

  2301.             if(v->s.esc3_level_length == 0) {

  2302.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2303.                     v->s.esc3_level_length = get_bits(gb, 3);

  2304.                     if(!v->s.esc3_level_length)

  2305.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2306.                 } else { //table 60

  2307.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2308.                 }

  2309.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2310.             }

  2311.             run = get_bits(gb, v->s.esc3_run_length);

  2312.             sign = get_bits1(gb);

  2313.             level = get_bits(gb, v->s.esc3_level_length);

  2314.             if(sign)

  2315.                 level = -level;

  2316.         }

  2317.     }

  2318. 

  2319.     *last = lst;

  2320.     *skip = run;

  2321.     *value = level;

  2322. }

  2323. 

  2324. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2325.  * @param v VC1Context

  2326.  * @param block block to decode

  2327.  * @param coded are AC coeffs present or not

  2328.  * @param codingset set of VLC to decode data

  2329.  */

  2330. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2331. {

  2332.     GetBitContext *gb = &v->s.gb;

  2333.     MpegEncContext *s = &v->s;

  2334.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2335.     int run_diff, i;

  2336.     int16_t *dc_val;

  2337.     int16_t *ac_val, *ac_val2;

  2338.     int dcdiff;

  2339. 

  2340.     /* Get DC differential */

  2341.     if (n < 4) {

  2342.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2343.     } else {

  2344.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2345.     }

  2346.     if (dcdiff < 0){

  2347.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2348.         return -1;

  2349.     }

  2350.     if (dcdiff)

  2351.     {

  2352.         if (dcdiff == 119 /* ESC index value */)

  2353.         {

  2354.             /* TODO: Optimize */

  2355.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2356.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2357.             else dcdiff = get_bits(gb, 8);

  2358.         }

  2359.         else

  2360.         {

  2361.             if (v->pq == 1)

  2362.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2363.             else if (v->pq == 2)

  2364.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2365.         }

  2366.         if (get_bits1(gb))

  2367.             dcdiff = -dcdiff;

  2368.     }

  2369. 

  2370.     /* Prediction */

  2371.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2372.     *dc_val = dcdiff;

  2373. 

  2374.     /* Store the quantized DC coeff, used for prediction */

  2375.     if (n < 4) {

  2376.         block[0] = dcdiff * s->y_dc_scale;

  2377.     } else {

  2378.         block[0] = dcdiff * s->c_dc_scale;

  2379.     }

  2380.     /* Skip ? */

  2381.     run_diff = 0;

  2382.     i = 0;

  2383.     if (!coded) {

  2384.         goto not_coded;

  2385.     }

  2386. 

  2387.     //AC Decoding

  2388.     i = 1;

  2389. 

  2390.     {

  2391.         int last = 0, skip, value;

  2392.         const int8_t *zz_table;

  2393.         int scale;

  2394.         int k;

  2395. 

  2396.         scale = v->pq * 2 + v->halfpq;

  2397. 

  2398.         if(v->s.ac_pred) {

  2399.             if(!dc_pred_dir)

  2400.                 zz_table = ff_vc1_horizontal_zz;

  2401.             else

  2402.                 zz_table = ff_vc1_vertical_zz;

  2403.         } else

  2404.             zz_table = ff_vc1_normal_zz;

  2405. 

  2406.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2407.         ac_val2 = ac_val;

  2408.         if(dc_pred_dir) //left

  2409.             ac_val -= 16;

  2410.         else //top

  2411.             ac_val -= 16 * s->block_wrap[n];

  2412. 

  2413.         while (!last) {

  2414.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2415.             i += skip;

  2416.             if(i > 63)

  2417.                 break;

  2418.             block[zz_table[i++]] = value;

  2419.         }

  2420. 

  2421.         /* apply AC prediction if needed */

  2422.         if(s->ac_pred) {

  2423.             if(dc_pred_dir) { //left

  2424.                 for(k = 1; k < 8; k++)

  2425.                     block[k << 3] += ac_val[k];

  2426.             } else { //top

  2427.                 for(k = 1; k < 8; k++)

  2428.                     block[k] += ac_val[k + 8];

  2429.             }

  2430.         }

  2431.         /* save AC coeffs for further prediction */

  2432.         for(k = 1; k < 8; k++) {

  2433.             ac_val2[k] = block[k << 3];

  2434.             ac_val2[k + 8] = block[k];

  2435.         }

  2436. 

  2437.         /* scale AC coeffs */

  2438.         for(k = 1; k < 64; k++)

  2439.             if(block[k]) {

  2440.                 block[k] *= scale;

  2441.                 if(!v->pquantizer)

  2442.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2443.             }

  2444. 

  2445.         if(s->ac_pred) i = 63;

  2446.     }

  2447. 

  2448. not_coded:

  2449.     if(!coded) {

  2450.         int k, scale;

  2451.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2452.         ac_val2 = ac_val;

  2453. 

  2454.         scale = v->pq * 2 + v->halfpq;

  2455.         memset(ac_val2, 0, 16 * 2);

  2456.         if(dc_pred_dir) {//left

  2457.             ac_val -= 16;

  2458.             if(s->ac_pred)

  2459.                 memcpy(ac_val2, ac_val, 8 * 2);

  2460.         } else {//top

  2461.             ac_val -= 16 * s->block_wrap[n];

  2462.             if(s->ac_pred)

  2463.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2464.         }

  2465. 

  2466.         /* apply AC prediction if needed */

  2467.         if(s->ac_pred) {

  2468.             if(dc_pred_dir) { //left

  2469.                 for(k = 1; k < 8; k++) {

  2470.                     block[k << 3] = ac_val[k] * scale;

  2471.                     if(!v->pquantizer && block[k << 3])

  2472.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2473.                 }

  2474.             } else { //top

  2475.                 for(k = 1; k < 8; k++) {

  2476.                     block[k] = ac_val[k + 8] * scale;

  2477.                     if(!v->pquantizer && block[k])

  2478.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2479.                 }

  2480.             }

  2481.             i = 63;

  2482.         }

  2483.     }

  2484.     s->block_last_index[n] = i;

  2485. 

  2486.     return 0;

  2487. }

  2488. 

  2489. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2490.  * @param v VC1Context

  2491.  * @param block block to decode

  2492.  * @param coded are AC coeffs present or not

  2493.  * @param codingset set of VLC to decode data

  2494.  */

  2495. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2496. {

  2497.     GetBitContext *gb = &v->s.gb;

  2498.     MpegEncContext *s = &v->s;

  2499.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2500.     int run_diff, i;

  2501.     int16_t *dc_val;

  2502.     int16_t *ac_val, *ac_val2;

  2503.     int dcdiff;

  2504.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2505.     int use_pred = s->ac_pred;

  2506.     int scale;

  2507.     int q1, q2 = 0;

  2508.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2509. 

  2510.     /* Get DC differential */

  2511.     if (n < 4) {

  2512.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2513.     } else {

  2514.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2515.     }

  2516.     if (dcdiff < 0){

  2517.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2518.         return -1;

  2519.     }

  2520.     if (dcdiff)

  2521.     {

  2522.         if (dcdiff == 119 /* ESC index value */)

  2523.         {

  2524.             /* TODO: Optimize */

  2525.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2526.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2527.             else dcdiff = get_bits(gb, 8);

  2528.         }

  2529.         else

  2530.         {

  2531.             if (mquant == 1)

  2532.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2533.             else if (mquant == 2)

  2534.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2535.         }

  2536.         if (get_bits1(gb))

  2537.             dcdiff = -dcdiff;

  2538.     }

  2539. 

  2540.     /* Prediction */

  2541.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2542.     *dc_val = dcdiff;

  2543. 

  2544.     /* Store the quantized DC coeff, used for prediction */

  2545.     if (n < 4) {

  2546.         block[0] = dcdiff * s->y_dc_scale;

  2547.     } else {

  2548.         block[0] = dcdiff * s->c_dc_scale;

  2549.     }

  2550.     /* Skip ? */

  2551.     run_diff = 0;

  2552.     i = 0;

  2553. 

  2554.     //AC Decoding

  2555.     i = 1;

  2556. 

  2557.     /* check if AC is needed at all */

  2558.     if(!a_avail && !c_avail) use_pred = 0;

  2559.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2560.     ac_val2 = ac_val;

  2561. 

  2562.     scale = mquant * 2 + v->halfpq;

  2563. 

  2564.     if(dc_pred_dir) //left

  2565.         ac_val -= 16;

  2566.     else //top

  2567.         ac_val -= 16 * s->block_wrap[n];

  2568. 

  2569.     q1 = s->current_picture.qscale_table[mb_pos];

  2570.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2571.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2572.     if(dc_pred_dir && n==1) q2 = q1;

  2573.     if(!dc_pred_dir && n==2) q2 = q1;

  2574.     if(n==3) q2 = q1;

  2575. 

  2576.     if(coded) {

  2577.         int last = 0, skip, value;

  2578.         const int8_t *zz_table;

  2579.         int k;

  2580. 

  2581.         if(v->s.ac_pred) {

  2582.             if(!dc_pred_dir)

  2583.                 zz_table = ff_vc1_horizontal_zz;

  2584.             else

  2585.                 zz_table = ff_vc1_vertical_zz;

  2586.         } else

  2587.             zz_table = ff_vc1_normal_zz;

  2588. 

  2589.         while (!last) {

  2590.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2591.             i += skip;

  2592.             if(i > 63)

  2593.                 break;

  2594.             block[zz_table[i++]] = value;

  2595.         }

  2596. 

  2597.         /* apply AC prediction if needed */

  2598.         if(use_pred) {

  2599.             /* scale predictors if needed*/

  2600.             if(q2 && q1!=q2) {

  2601.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2602.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2603. 

  2604.                 if(dc_pred_dir) { //left

  2605.                     for(k = 1; k < 8; k++)

  2606.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2607.                 } else { //top

  2608.                     for(k = 1; k < 8; k++)

  2609.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2610.                 }

  2611.             } else {

  2612.                 if(dc_pred_dir) { //left

  2613.                     for(k = 1; k < 8; k++)

  2614.                         block[k << 3] += ac_val[k];

  2615.                 } else { //top

  2616.                     for(k = 1; k < 8; k++)

  2617.                         block[k] += ac_val[k + 8];

  2618.                 }

  2619.             }

  2620.         }

  2621.         /* save AC coeffs for further prediction */

  2622.         for(k = 1; k < 8; k++) {

  2623.             ac_val2[k] = block[k << 3];

  2624.             ac_val2[k + 8] = block[k];

  2625.         }

  2626. 

  2627.         /* scale AC coeffs */

  2628.         for(k = 1; k < 64; k++)

  2629.             if(block[k]) {

  2630.                 block[k] *= scale;

  2631.                 if(!v->pquantizer)

  2632.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2633.             }

  2634. 

  2635.         if(use_pred) i = 63;

  2636.     } else { // no AC coeffs

  2637.         int k;

  2638. 

  2639.         memset(ac_val2, 0, 16 * 2);

  2640.         if(dc_pred_dir) {//left

  2641.             if(use_pred) {

  2642.                 memcpy(ac_val2, ac_val, 8 * 2);

  2643.                 if(q2 && q1!=q2) {

  2644.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2645.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2646.                     for(k = 1; k < 8; k++)

  2647.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2648.                 }

  2649.             }

  2650.         } else {//top

  2651.             if(use_pred) {

  2652.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2653.                 if(q2 && q1!=q2) {

  2654.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2655.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2656.                     for(k = 1; k < 8; k++)

  2657.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2658.                 }

  2659.             }

  2660.         }

  2661. 

  2662.         /* apply AC prediction if needed */

  2663.         if(use_pred) {

  2664.             if(dc_pred_dir) { //left

  2665.                 for(k = 1; k < 8; k++) {

  2666.                     block[k << 3] = ac_val2[k] * scale;

  2667.                     if(!v->pquantizer && block[k << 3])

  2668.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2669.                 }

  2670.             } else { //top

  2671.                 for(k = 1; k < 8; k++) {

  2672.                     block[k] = ac_val2[k + 8] * scale;

  2673.                     if(!v->pquantizer && block[k])

  2674.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2675.                 }

  2676.             }

  2677.             i = 63;

  2678.         }

  2679.     }

  2680.     s->block_last_index[n] = i;

  2681. 

  2682.     return 0;

  2683. }

  2684. 

  2685. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2686.  * @param v VC1Context

  2687.  * @param block block to decode

  2688.  * @param coded are AC coeffs present or not

  2689.  * @param mquant block quantizer

  2690.  * @param codingset set of VLC to decode data

  2691.  */

  2692. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2693. {

  2694.     GetBitContext *gb = &v->s.gb;

  2695.     MpegEncContext *s = &v->s;

  2696.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2697.     int run_diff, i;

  2698.     int16_t *dc_val;

  2699.     int16_t *ac_val, *ac_val2;

  2700.     int dcdiff;

  2701.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2702.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2703.     int use_pred = s->ac_pred;

  2704.     int scale;

  2705.     int q1, q2 = 0;

  2706. 

  2707.     /* XXX: Guard against dumb values of mquant */

  2708.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2709. 

  2710.     /* Set DC scale - y and c use the same */

  2711.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2712.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2713. 

  2714.     /* Get DC differential */

  2715.     if (n < 4) {

  2716.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2717.     } else {

  2718.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2719.     }

  2720.     if (dcdiff < 0){

  2721.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2722.         return -1;

  2723.     }

  2724.     if (dcdiff)

  2725.     {

  2726.         if (dcdiff == 119 /* ESC index value */)

  2727.         {

  2728.             /* TODO: Optimize */

  2729.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2730.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2731.             else dcdiff = get_bits(gb, 8);

  2732.         }

  2733.         else

  2734.         {

  2735.             if (mquant == 1)

  2736.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2737.             else if (mquant == 2)

  2738.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2739.         }

  2740.         if (get_bits1(gb))

  2741.             dcdiff = -dcdiff;

  2742.     }

  2743. 

  2744.     /* Prediction */

  2745.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2746.     *dc_val = dcdiff;

  2747. 

  2748.     /* Store the quantized DC coeff, used for prediction */

  2749. 

  2750.     if (n < 4) {

  2751.         block[0] = dcdiff * s->y_dc_scale;

  2752.     } else {

  2753.         block[0] = dcdiff * s->c_dc_scale;

  2754.     }

  2755.     /* Skip ? */

  2756.     run_diff = 0;

  2757.     i = 0;

  2758. 

  2759.     //AC Decoding

  2760.     i = 1;

  2761. 

  2762.     /* check if AC is needed at all and adjust direction if needed */

  2763.     if(!a_avail) dc_pred_dir = 1;

  2764.     if(!c_avail) dc_pred_dir = 0;

  2765.     if(!a_avail && !c_avail) use_pred = 0;

  2766.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2767.     ac_val2 = ac_val;

  2768. 

  2769.     scale = mquant * 2 + v->halfpq;

  2770. 

  2771.     if(dc_pred_dir) //left

  2772.         ac_val -= 16;

  2773.     else //top

  2774.         ac_val -= 16 * s->block_wrap[n];

  2775. 

  2776.     q1 = s->current_picture.qscale_table[mb_pos];

  2777.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2778.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2779.     if(dc_pred_dir && n==1) q2 = q1;

  2780.     if(!dc_pred_dir && n==2) q2 = q1;

  2781.     if(n==3) q2 = q1;

  2782. 

  2783.     if(coded) {

  2784.         int last = 0, skip, value;

  2785.         const int8_t *zz_table;

  2786.         int k;

  2787. 

  2788.         zz_table = ff_vc1_simple_progressive_8x8_zz;

  2789. 

  2790.         while (!last) {

  2791.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2792.             i += skip;

  2793.             if(i > 63)

  2794.                 break;

  2795.             block[zz_table[i++]] = value;

  2796.         }

  2797. 

  2798.         /* apply AC prediction if needed */

  2799.         if(use_pred) {

  2800.             /* scale predictors if needed*/

  2801.             if(q2 && q1!=q2) {

  2802.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2803.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2804. 

  2805.                 if(dc_pred_dir) { //left

  2806.                     for(k = 1; k < 8; k++)

  2807.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2808.                 } else { //top

  2809.                     for(k = 1; k < 8; k++)

  2810.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2811.                 }

  2812.             } else {

  2813.                 if(dc_pred_dir) { //left

  2814.                     for(k = 1; k < 8; k++)

  2815.                         block[k << 3] += ac_val[k];

  2816.                 } else { //top

  2817.                     for(k = 1; k < 8; k++)

  2818.                         block[k] += ac_val[k + 8];

  2819.                 }

  2820.             }

  2821.         }

  2822.         /* save AC coeffs for further prediction */

  2823.         for(k = 1; k < 8; k++) {

  2824.             ac_val2[k] = block[k << 3];

  2825.             ac_val2[k + 8] = block[k];

  2826.         }

  2827. 

  2828.         /* scale AC coeffs */

  2829.         for(k = 1; k < 64; k++)

  2830.             if(block[k]) {

  2831.                 block[k] *= scale;

  2832.                 if(!v->pquantizer)

  2833.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2834.             }

  2835. 

  2836.         if(use_pred) i = 63;

  2837.     } else { // no AC coeffs

  2838.         int k;

  2839. 

  2840.         memset(ac_val2, 0, 16 * 2);

  2841.         if(dc_pred_dir) {//left

  2842.             if(use_pred) {

  2843.                 memcpy(ac_val2, ac_val, 8 * 2);

  2844.                 if(q2 && q1!=q2) {

  2845.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2846.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2847.                     for(k = 1; k < 8; k++)

  2848.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2849.                 }

  2850.             }

  2851.         } else {//top

  2852.             if(use_pred) {

  2853.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2854.                 if(q2 && q1!=q2) {

  2855.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2856.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2857.                     for(k = 1; k < 8; k++)

  2858.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2859.                 }

  2860.             }

  2861.         }

  2862. 

  2863.         /* apply AC prediction if needed */

  2864.         if(use_pred) {

  2865.             if(dc_pred_dir) { //left

  2866.                 for(k = 1; k < 8; k++) {

  2867.                     block[k << 3] = ac_val2[k] * scale;

  2868.                     if(!v->pquantizer && block[k << 3])

  2869.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2870.                 }

  2871.             } else { //top

  2872.                 for(k = 1; k < 8; k++) {

  2873.                     block[k] = ac_val2[k + 8] * scale;

  2874.                     if(!v->pquantizer && block[k])

  2875.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2876.                 }

  2877.             }

  2878.             i = 63;

  2879.         }

  2880.     }

  2881.     s->block_last_index[n] = i;

  2882. 

  2883.     return 0;

  2884. }

  2885. 

  2886. /** Decode P block

  2887.  */

  2888. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block)

  2889. {

  2890.     MpegEncContext *s = &v->s;

  2891.     GetBitContext *gb = &s->gb;

  2892.     int i, j;

  2893.     int subblkpat = 0;

  2894.     int scale, off, idx, last, skip, value;

  2895.     int ttblk = ttmb & 7;

  2896. 

  2897.     if(ttmb == -1) {

  2898.         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)];

  2899.     }

  2900.     if(ttblk == TT_4X4) {

  2901.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  2902.     }

  2903.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  2904.         subblkpat = decode012(gb);

  2905.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  2906.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  2907.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  2908.     }

  2909.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  2910. 

  2911.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  2912.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  2913.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  2914.         ttblk = TT_8X4;

  2915.     }

  2916.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  2917.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  2918.         ttblk = TT_4X8;

  2919.     }

  2920.     switch(ttblk) {

  2921.     case TT_8X8:

  2922.         i = 0;

  2923.         last = 0;

  2924.         while (!last) {

  2925.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2926.             i += skip;

  2927.             if(i > 63)

  2928.                 break;

  2929.             idx = ff_vc1_simple_progressive_8x8_zz[i++];

  2930.             block[idx] = value * scale;

  2931.             if(!v->pquantizer)

  2932.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  2933.         }

  2934.         s->dsp.vc1_inv_trans_8x8(block);

  2935.         break;

  2936.     case TT_4X4:

  2937.         for(j = 0; j < 4; j++) {

  2938.             last = subblkpat & (1 << (3 - j));

  2939.             i = 0;

  2940.             off = (j & 1) * 4 + (j & 2) * 16;

  2941.             while (!last) {

  2942.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2943.                 i += skip;

  2944.                 if(i > 15)

  2945.                     break;

  2946.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  2947.                 block[idx + off] = value * scale;

  2948.                 if(!v->pquantizer)

  2949.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  2950.             }

  2951.             if(!(subblkpat & (1 << (3 - j))))

  2952.                 s->dsp.vc1_inv_trans_4x4(block, j);

  2953.         }

  2954.         break;

  2955.     case TT_8X4:

  2956.         for(j = 0; j < 2; j++) {

  2957.             last = subblkpat & (1 << (1 - j));

  2958.             i = 0;

  2959.             off = j * 32;

  2960.             while (!last) {

  2961.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2962.                 i += skip;

  2963.                 if(i > 31)

  2964.                     break;

  2965.                 if(v->profile < PROFILE_ADVANCED)

  2966.                     idx = ff_vc1_simple_progressive_8x4_zz[i++];

  2967.                 else

  2968.                     idx = ff_vc1_adv_progressive_8x4_zz[i++];

  2969.                 block[idx + off] = value * scale;

  2970.                 if(!v->pquantizer)

  2971.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  2972.             }

  2973.             if(!(subblkpat & (1 << (1 - j))))

  2974.                 s->dsp.vc1_inv_trans_8x4(block, j);

  2975.         }

  2976.         break;

  2977.     case TT_4X8:

  2978.         for(j = 0; j < 2; j++) {

  2979.             last = subblkpat & (1 << (1 - j));

  2980.             i = 0;

  2981.             off = j * 4;

  2982.             while (!last) {

  2983.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2984.                 i += skip;

  2985.                 if(i > 31)

  2986.                     break;

  2987.                 if(v->profile < PROFILE_ADVANCED)

  2988.                     idx = ff_vc1_simple_progressive_4x8_zz[i++];

  2989.                 else

  2990.                     idx = ff_vc1_adv_progressive_4x8_zz[i++];

  2991.                 block[idx + off] = value * scale;

  2992.                 if(!v->pquantizer)

  2993.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  2994.             }

  2995.             if(!(subblkpat & (1 << (1 - j))))

  2996.                 s->dsp.vc1_inv_trans_4x8(block, j);

  2997.         }

  2998.         break;

  2999.     }

  3000.     return 0;

  3001. }

  3002. 

  3003. 

  3004. /** Decode one P-frame MB (in Simple/Main profile)

  3005.  */

  3006. static int vc1_decode_p_mb(VC1Context *v)

  3007. {

  3008.     MpegEncContext *s = &v->s;

  3009.     GetBitContext *gb = &s->gb;

  3010.     int i, j;

  3011.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3012.     int cbp; /* cbp decoding stuff */

  3013.     int mqdiff, mquant; /* MB quantization */

  3014.     int ttmb = v->ttfrm; /* MB Transform type */

  3015.     int status;

  3016. 

  3017.     static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },

  3018.       offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3019.     int mb_has_coeffs = 1; /* last_flag */

  3020.     int dmv_x, dmv_y; /* Differential MV components */

  3021.     int index, index1; /* LUT indices */

  3022.     int val, sign; /* temp values */

  3023.     int first_block = 1;

  3024.     int dst_idx, off;

  3025.     int skipped, fourmv;

  3026. 

  3027.     mquant = v->pq; /* Loosy initialization */

  3028. 

  3029.     if (v->mv_type_is_raw)

  3030.         fourmv = get_bits1(gb);

  3031.     else

  3032.         fourmv = v->mv_type_mb_plane[mb_pos];

  3033.     if (v->skip_is_raw)

  3034.         skipped = get_bits1(gb);

  3035.     else

  3036.         skipped = v->s.mbskip_table[mb_pos];

  3037. 

  3038.     s->dsp.clear_blocks(s->block[0]);

  3039. 

  3040.     if (!fourmv) /* 1MV mode */

  3041.     {

  3042.         if (!skipped)

  3043.         {

  3044.             GET_MVDATA(dmv_x, dmv_y);

  3045. 

  3046.             if (s->mb_intra) {

  3047.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3048.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3049.             }

  3050.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3051.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3052. 

  3053.             /* FIXME Set DC val for inter block ? */

  3054.             if (s->mb_intra && !mb_has_coeffs)

  3055.             {

  3056.                 GET_MQUANT();

  3057.                 s->ac_pred = get_bits1(gb);

  3058.                 cbp = 0;

  3059.             }

  3060.             else if (mb_has_coeffs)

  3061.             {

  3062.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3063.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3064.                 GET_MQUANT();

  3065.             }

  3066.             else

  3067.             {

  3068.                 mquant = v->pq;

  3069.                 cbp = 0;

  3070.             }

  3071.             s->current_picture.qscale_table[mb_pos] = mquant;

  3072. 

  3073.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3074.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3075.                                 VC1_TTMB_VLC_BITS, 2);

  3076.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3077.             dst_idx = 0;

  3078.             for (i=0; i<6; i++)

  3079.             {

  3080.                 s->dc_val[0][s->block_index[i]] = 0;

  3081.                 dst_idx += i >> 2;

  3082.                 val = ((cbp >> (5 - i)) & 1);

  3083.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3084.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3085.                 if(s->mb_intra) {

  3086.                     /* check if prediction blocks A and C are available */

  3087.                     v->a_avail = v->c_avail = 0;

  3088.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3089.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3090.                     if(i == 1 || i == 3 || s->mb_x)

  3091.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3092. 

  3093.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3094.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3095.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3096.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3097.                     for(j = 0; j < 64; j++) s->block[i][j] += 128;

  3098.                     if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;

  3099.                     s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3100.                     if(v->pq >= 9 && v->overlap) {

  3101.                         if(v->c_avail)

  3102.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3103.                         if(v->a_avail)

  3104.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3105.                     }

  3106.                 } else if(val) {

  3107.                     vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);

  3108.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3109.                     first_block = 0;

  3110.                     if((i<4) || !(s->flags & CODEC_FLAG_GRAY))

  3111.                         s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3112.                 }

  3113.             }

  3114.         }

  3115.         else //Skipped

  3116.         {

  3117.             s->mb_intra = 0;

  3118.             for(i = 0; i < 6; i++) {

  3119.                 v->mb_type[0][s->block_index[i]] = 0;

  3120.                 s->dc_val[0][s->block_index[i]] = 0;

  3121.             }

  3122.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3123.             s->current_picture.qscale_table[mb_pos] = 0;

  3124.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3125.             vc1_mc_1mv(v, 0);

  3126.             return 0;

  3127.         }

  3128.     } //1MV mode

  3129.     else //4MV mode

  3130.     {

  3131.         if (!skipped /* unskipped MB */)

  3132.         {

  3133.             int intra_count = 0, coded_inter = 0;

  3134.             int is_intra[6], is_coded[6];

  3135.             /* Get CBPCY */

  3136.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3137.             for (i=0; i<6; i++)

  3138.             {

  3139.                 val = ((cbp >> (5 - i)) & 1);

  3140.                 s->dc_val[0][s->block_index[i]] = 0;

  3141.                 s->mb_intra = 0;

  3142.                 if(i < 4) {

  3143.                     dmv_x = dmv_y = 0;

  3144.                     s->mb_intra = 0;

  3145.                     mb_has_coeffs = 0;

  3146.                     if(val) {

  3147.                         GET_MVDATA(dmv_x, dmv_y);

  3148.                     }

  3149.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3150.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3151.                     intra_count += s->mb_intra;

  3152.                     is_intra[i] = s->mb_intra;

  3153.                     is_coded[i] = mb_has_coeffs;

  3154.                 }

  3155.                 if(i&4){

  3156.                     is_intra[i] = (intra_count >= 3);

  3157.                     is_coded[i] = val;

  3158.                 }

  3159.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3160.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3161.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3162.             }

  3163.             // if there are no coded blocks then don't do anything more

  3164.             if(!intra_count && !coded_inter) return 0;

  3165.             dst_idx = 0;

  3166.             GET_MQUANT();

  3167.             s->current_picture.qscale_table[mb_pos] = mquant;

  3168.             /* test if block is intra and has pred */

  3169.             {

  3170.                 int intrapred = 0;

  3171.                 for(i=0; i<6; i++)

  3172.                     if(is_intra[i]) {

  3173.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3174.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3175.                             intrapred = 1;

  3176.                             break;

  3177.                         }

  3178.                     }

  3179.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3180.                 else s->ac_pred = 0;

  3181.             }

  3182.             if (!v->ttmbf && coded_inter)

  3183.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3184.             for (i=0; i<6; i++)

  3185.             {

  3186.                 dst_idx += i >> 2;

  3187.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3188.                 s->mb_intra = is_intra[i];

  3189.                 if (is_intra[i]) {

  3190.                     /* check if prediction blocks A and C are available */

  3191.                     v->a_avail = v->c_avail = 0;

  3192.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3193.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3194.                     if(i == 1 || i == 3 || s->mb_x)

  3195.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3196. 

  3197.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3198.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3199.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3200.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3201.                     for(j = 0; j < 64; j++) s->block[i][j] += 128;

  3202.                     if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;

  3203.                     s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3204.                     if(v->pq >= 9 && v->overlap) {

  3205.                         if(v->c_avail)

  3206.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3207.                         if(v->a_avail)

  3208.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3209.                     }

  3210.                 } else if(is_coded[i]) {

  3211.                     status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);

  3212.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3213.                     first_block = 0;

  3214.                     if((i<4) || !(s->flags & CODEC_FLAG_GRAY))

  3215.                         s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3216.                 }

  3217.             }

  3218.             return status;

  3219.         }

  3220.         else //Skipped MB

  3221.         {

  3222.             s->mb_intra = 0;

  3223.             s->current_picture.qscale_table[mb_pos] = 0;

  3224.             for (i=0; i<6; i++) {

  3225.                 v->mb_type[0][s->block_index[i]] = 0;

  3226.                 s->dc_val[0][s->block_index[i]] = 0;

  3227.             }

  3228.             for (i=0; i<4; i++)

  3229.             {

  3230.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3231.                 vc1_mc_4mv_luma(v, i);

  3232.             }

  3233.             vc1_mc_4mv_chroma(v);

  3234.             s->current_picture.qscale_table[mb_pos] = 0;

  3235.             return 0;

  3236.         }

  3237.     }

  3238. 

  3239.     /* Should never happen */

  3240.     return -1;

  3241. }

  3242. 

  3243. /** Decode one B-frame MB (in Main profile)

  3244.  */

  3245. static void vc1_decode_b_mb(VC1Context *v)

  3246. {

  3247.     MpegEncContext *s = &v->s;

  3248.     GetBitContext *gb = &s->gb;

  3249.     int i, j;

  3250.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3251.     int cbp = 0; /* cbp decoding stuff */

  3252.     int mqdiff, mquant; /* MB quantization */

  3253.     int ttmb = v->ttfrm; /* MB Transform type */

  3254. 

  3255.     static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },

  3256.       offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3257.     int mb_has_coeffs = 0; /* last_flag */

  3258.     int index, index1; /* LUT indices */

  3259.     int val, sign; /* temp values */

  3260.     int first_block = 1;

  3261.     int dst_idx, off;

  3262.     int skipped, direct;

  3263.     int dmv_x[2], dmv_y[2];

  3264.     int bmvtype = BMV_TYPE_BACKWARD;

  3265. 

  3266.     mquant = v->pq; /* Loosy initialization */

  3267.     s->mb_intra = 0;

  3268. 

  3269.     if (v->dmb_is_raw)

  3270.         direct = get_bits1(gb);

  3271.     else

  3272.         direct = v->direct_mb_plane[mb_pos];

  3273.     if (v->skip_is_raw)

  3274.         skipped = get_bits1(gb);

  3275.     else

  3276.         skipped = v->s.mbskip_table[mb_pos];

  3277. 

  3278.     s->dsp.clear_blocks(s->block[0]);

  3279.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3280.     for(i = 0; i < 6; i++) {

  3281.         v->mb_type[0][s->block_index[i]] = 0;

  3282.         s->dc_val[0][s->block_index[i]] = 0;

  3283.     }

  3284.     s->current_picture.qscale_table[mb_pos] = 0;

  3285. 

  3286.     if (!direct) {

  3287.         if (!skipped) {

  3288.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3289.             dmv_x[1] = dmv_x[0];

  3290.             dmv_y[1] = dmv_y[0];

  3291.         }

  3292.         if(skipped || !s->mb_intra) {

  3293.             bmvtype = decode012(gb);

  3294.             switch(bmvtype) {

  3295.             case 0:

  3296.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3297.                 break;

  3298.             case 1:

  3299.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3300.                 break;

  3301.             case 2:

  3302.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3303.                 dmv_x[0] = dmv_y[0] = 0;

  3304.             }

  3305.         }

  3306.     }

  3307.     for(i = 0; i < 6; i++)

  3308.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3309. 

  3310.     if (skipped) {

  3311.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3312.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3313.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3314.         return;

  3315.     }

  3316.     if (direct) {

  3317.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3318.         GET_MQUANT();

  3319.         s->mb_intra = 0;

  3320.         mb_has_coeffs = 0;

  3321.         s->current_picture.qscale_table[mb_pos] = mquant;

  3322.         if(!v->ttmbf)

  3323.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3324.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3325.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3326.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3327.     } else {

  3328.         if(!mb_has_coeffs && !s->mb_intra) {

  3329.             /* no coded blocks - effectively skipped */

  3330.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3331.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3332.             return;

  3333.         }

  3334.         if(s->mb_intra && !mb_has_coeffs) {

  3335.             GET_MQUANT();

  3336.             s->current_picture.qscale_table[mb_pos] = mquant;

  3337.             s->ac_pred = get_bits1(gb);

  3338.             cbp = 0;

  3339.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3340.         } else {

  3341.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3342.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3343.                 if(!mb_has_coeffs) {

  3344.                     /* interpolated skipped block */

  3345.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3346.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3347.                     return;

  3348.                 }

  3349.             }

  3350.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3351.             if(!s->mb_intra) {

  3352.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3353.             }

  3354.             if(s->mb_intra)

  3355.                 s->ac_pred = get_bits1(gb);

  3356.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3357.             GET_MQUANT();

  3358.             s->current_picture.qscale_table[mb_pos] = mquant;

  3359.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3360.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3361.         }

  3362.     }

  3363.     dst_idx = 0;

  3364.     for (i=0; i<6; i++)

  3365.     {

  3366.         s->dc_val[0][s->block_index[i]] = 0;

  3367.         dst_idx += i >> 2;

  3368.         val = ((cbp >> (5 - i)) & 1);

  3369.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3370.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3371.         if(s->mb_intra) {

  3372.             /* check if prediction blocks A and C are available */

  3373.             v->a_avail = v->c_avail = 0;

  3374.             if(i == 2 || i == 3 || !s->first_slice_line)

  3375.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3376.             if(i == 1 || i == 3 || s->mb_x)

  3377.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3378. 

  3379.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3380.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3381.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3382.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3383.             for(j = 0; j < 64; j++) s->block[i][j] += 128;

  3384.             s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3385.         } else if(val) {

  3386.             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);

  3387.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3388.             first_block = 0;

  3389.             if((i<4) || !(s->flags & CODEC_FLAG_GRAY))

  3390.                 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3391.         }

  3392.     }

  3393. }

  3394. 

  3395. /** Decode blocks of I-frame

  3396.  */

  3397. static void vc1_decode_i_blocks(VC1Context *v)

  3398. {

  3399.     int k, j;

  3400.     MpegEncContext *s = &v->s;

  3401.     int cbp, val;

  3402.     uint8_t *coded_val;

  3403.     int mb_pos;

  3404. 

  3405.     /* select codingmode used for VLC tables selection */

  3406.     switch(v->y_ac_table_index){

  3407.     case 0:

  3408.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3409.         break;

  3410.     case 1:

  3411.         v->codingset = CS_HIGH_MOT_INTRA;

  3412.         break;

  3413.     case 2:

  3414.         v->codingset = CS_MID_RATE_INTRA;

  3415.         break;

  3416.     }

  3417. 

  3418.     switch(v->c_ac_table_index){

  3419.     case 0:

  3420.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3421.         break;

  3422.     case 1:

  3423.         v->codingset2 = CS_HIGH_MOT_INTER;

  3424.         break;

  3425.     case 2:

  3426.         v->codingset2 = CS_MID_RATE_INTER;

  3427.         break;

  3428.     }

  3429. 

  3430.     /* Set DC scale - y and c use the same */

  3431.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3432.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3433. 

  3434.     //do frame decode

  3435.     s->mb_x = s->mb_y = 0;

  3436.     s->mb_intra = 1;

  3437.     s->first_slice_line = 1;

  3438.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3439.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3440.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3441.             ff_init_block_index(s);

  3442.             ff_update_block_index(s);

  3443.             s->dsp.clear_blocks(s->block[0]);

  3444.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3445.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3446.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3447.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3448.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3449. 

  3450.             // do actual MB decoding and displaying

  3451.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3452.             v->s.ac_pred = get_bits1(&v->s.gb);

  3453. 

  3454.             for(k = 0; k < 6; k++) {

  3455.                 val = ((cbp >> (5 - k)) & 1);

  3456. 

  3457.                 if (k < 4) {

  3458.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3459.                     val = val ^ pred;

  3460.                     *coded_val = val;

  3461.                 }

  3462.                 cbp |= val << (5 - k);

  3463. 

  3464.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3465. 

  3466.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3467.                 if(!v->res_fasttx && !v->res_x8) for(j = 0; j < 64; j++) s->block[k][j] -= 16;

  3468.                 if(v->pq >= 9 && v->overlap) {

  3469.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3470.                 }

  3471.             }

  3472. 

  3473.             vc1_put_block(v, s->block);

  3474.             if(v->pq >= 9 && v->overlap) {

  3475.                 if(s->mb_x) {

  3476.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3477.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3478.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3479.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3480.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3481.                     }

  3482.                 }

  3483.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3484.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3485.                 if(!s->first_slice_line) {

  3486.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3487.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3488.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3489.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3490.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3491.                     }

  3492.                 }

  3493.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3494.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3495.             }

  3496. 

  3497.             if(get_bits_count(&s->gb) > v->bits) {

  3498.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3499.                 return;

  3500.             }

  3501.         }

  3502.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3503.         s->first_slice_line = 0;

  3504.     }

  3505. }

  3506. 

  3507. /** Decode blocks of I-frame for advanced profile

  3508.  */

  3509. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3510. {

  3511.     int k, j;

  3512.     MpegEncContext *s = &v->s;

  3513.     int cbp, val;

  3514.     uint8_t *coded_val;

  3515.     int mb_pos;

  3516.     int mquant = v->pq;

  3517.     int mqdiff;

  3518.     int overlap;

  3519.     GetBitContext *gb = &s->gb;

  3520. 

  3521.     /* select codingmode used for VLC tables selection */

  3522.     switch(v->y_ac_table_index){

  3523.     case 0:

  3524.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3525.         break;

  3526.     case 1:

  3527.         v->codingset = CS_HIGH_MOT_INTRA;

  3528.         break;

  3529.     case 2:

  3530.         v->codingset = CS_MID_RATE_INTRA;

  3531.         break;

  3532.     }

  3533. 

  3534.     switch(v->c_ac_table_index){

  3535.     case 0:

  3536.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3537.         break;

  3538.     case 1:

  3539.         v->codingset2 = CS_HIGH_MOT_INTER;

  3540.         break;

  3541.     case 2:

  3542.         v->codingset2 = CS_MID_RATE_INTER;

  3543.         break;

  3544.     }

  3545. 

  3546.     //do frame decode

  3547.     s->mb_x = s->mb_y = 0;

  3548.     s->mb_intra = 1;

  3549.     s->first_slice_line = 1;

  3550.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3551.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3552.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3553.             ff_init_block_index(s);

  3554.             ff_update_block_index(s);

  3555.             s->dsp.clear_blocks(s->block[0]);

  3556.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3557.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3558.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3559.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3560. 

  3561.             // do actual MB decoding and displaying

  3562.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3563.             if(v->acpred_is_raw)

  3564.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3565.             else

  3566.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3567. 

  3568.             if(v->condover == CONDOVER_SELECT) {

  3569.                 if(v->overflg_is_raw)

  3570.                     overlap = get_bits1(&v->s.gb);

  3571.                 else

  3572.                     overlap = v->over_flags_plane[mb_pos];

  3573.             } else

  3574.                 overlap = (v->condover == CONDOVER_ALL);

  3575. 

  3576.             GET_MQUANT();

  3577. 

  3578.             s->current_picture.qscale_table[mb_pos] = mquant;

  3579.             /* Set DC scale - y and c use the same */

  3580.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3581.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3582. 

  3583.             for(k = 0; k < 6; k++) {

  3584.                 val = ((cbp >> (5 - k)) & 1);

  3585. 

  3586.                 if (k < 4) {

  3587.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3588.                     val = val ^ pred;

  3589.                     *coded_val = val;

  3590.                 }

  3591.                 cbp |= val << (5 - k);

  3592. 

  3593.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3594.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3595. 

  3596.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3597. 

  3598.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3599.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3600.             }

  3601. 

  3602.             vc1_put_block(v, s->block);

  3603.             if(overlap) {

  3604.                 if(s->mb_x) {

  3605.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3606.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3607.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3608.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3609.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3610.                     }

  3611.                 }

  3612.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3613.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3614.                 if(!s->first_slice_line) {

  3615.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3616.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3617.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3618.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3619.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3620.                     }

  3621.                 }

  3622.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3623.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3624.             }

  3625. 

  3626.             if(get_bits_count(&s->gb) > v->bits) {

  3627.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3628.                 return;

  3629.             }

  3630.         }

  3631.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3632.         s->first_slice_line = 0;

  3633.     }

  3634. }

  3635. 

  3636. static void vc1_decode_p_blocks(VC1Context *v)

  3637. {

  3638.     MpegEncContext *s = &v->s;

  3639. 

  3640.     /* select codingmode used for VLC tables selection */

  3641.     switch(v->c_ac_table_index){

  3642.     case 0:

  3643.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3644.         break;

  3645.     case 1:

  3646.         v->codingset = CS_HIGH_MOT_INTRA;

  3647.         break;

  3648.     case 2:

  3649.         v->codingset = CS_MID_RATE_INTRA;

  3650.         break;

  3651.     }

  3652. 

  3653.     switch(v->c_ac_table_index){

  3654.     case 0:

  3655.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3656.         break;

  3657.     case 1:

  3658.         v->codingset2 = CS_HIGH_MOT_INTER;

  3659.         break;

  3660.     case 2:

  3661.         v->codingset2 = CS_MID_RATE_INTER;

  3662.         break;

  3663.     }

  3664. 

  3665.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3666.     s->first_slice_line = 1;

  3667.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3668.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3669.             ff_init_block_index(s);

  3670.             ff_update_block_index(s);

  3671.             s->dsp.clear_blocks(s->block[0]);

  3672. 

  3673.             vc1_decode_p_mb(v);

  3674.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3675.                 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);

  3676.                 return;

  3677.             }

  3678.         }

  3679.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3680.         s->first_slice_line = 0;

  3681.     }

  3682. }

  3683. 

  3684. static void vc1_decode_b_blocks(VC1Context *v)

  3685. {

  3686.     MpegEncContext *s = &v->s;

  3687. 

  3688.     /* select codingmode used for VLC tables selection */

  3689.     switch(v->c_ac_table_index){

  3690.     case 0:

  3691.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3692.         break;

  3693.     case 1:

  3694.         v->codingset = CS_HIGH_MOT_INTRA;

  3695.         break;

  3696.     case 2:

  3697.         v->codingset = CS_MID_RATE_INTRA;

  3698.         break;

  3699.     }

  3700. 

  3701.     switch(v->c_ac_table_index){

  3702.     case 0:

  3703.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3704.         break;

  3705.     case 1:

  3706.         v->codingset2 = CS_HIGH_MOT_INTER;

  3707.         break;

  3708.     case 2:

  3709.         v->codingset2 = CS_MID_RATE_INTER;

  3710.         break;

  3711.     }

  3712. 

  3713.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3714.     s->first_slice_line = 1;

  3715.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3716.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3717.             ff_init_block_index(s);

  3718.             ff_update_block_index(s);

  3719.             s->dsp.clear_blocks(s->block[0]);

  3720. 

  3721.             vc1_decode_b_mb(v);

  3722.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3723.                 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);

  3724.                 return;

  3725.             }

  3726.         }

  3727.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3728.         s->first_slice_line = 0;

  3729.     }

  3730. }

  3731. 

  3732. static void vc1_decode_skip_blocks(VC1Context *v)

  3733. {

  3734.     MpegEncContext *s = &v->s;

  3735. 

  3736.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3737.     s->first_slice_line = 1;

  3738.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3739.         s->mb_x = 0;

  3740.         ff_init_block_index(s);

  3741.         ff_update_block_index(s);

  3742.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3743.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3744.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3745.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3746.         s->first_slice_line = 0;

  3747.     }

  3748.     s->pict_type = P_TYPE;

  3749. }

  3750. 

  3751. static void vc1_decode_blocks(VC1Context *v)

  3752. {

  3753. 

  3754.     v->s.esc3_level_length = 0;

  3755. 

  3756.     switch(v->s.pict_type) {

  3757.     case I_TYPE:

  3758.         if(v->profile == PROFILE_ADVANCED)

  3759.             vc1_decode_i_blocks_adv(v);

  3760.         else

  3761.             vc1_decode_i_blocks(v);

  3762.         break;

  3763.     case P_TYPE:

  3764.         if(v->p_frame_skipped)

  3765.             vc1_decode_skip_blocks(v);

  3766.         else

  3767.             vc1_decode_p_blocks(v);

  3768.         break;

  3769.     case B_TYPE:

  3770.         if(v->bi_type){

  3771.             if(v->profile == PROFILE_ADVANCED)

  3772.                 vc1_decode_i_blocks_adv(v);

  3773.             else

  3774.                 vc1_decode_i_blocks(v);

  3775.         }else

  3776.             vc1_decode_b_blocks(v);

  3777.         break;

  3778.     }

  3779. }

  3780. 

  3781. /** Find VC-1 marker in buffer

  3782.  * @return position where next marker starts or end of buffer if no marker found

  3783.  */

  3784. static av_always_inline uint8_t* find_next_marker(uint8_t *src, uint8_t *end)

  3785. {

  3786.     uint32_t mrk = 0xFFFFFFFF;

  3787. 

  3788.     if(end-src < 4) return end;

  3789.     while(src < end){

  3790.         mrk = (mrk << 8) | *src++;

  3791.         if(IS_MARKER(mrk))

  3792.             return src-4;

  3793.     }

  3794.     return end;

  3795. }

  3796. 

  3797. static av_always_inline int vc1_unescape_buffer(uint8_t *src, int size, uint8_t *dst)

  3798. {

  3799.     int dsize = 0, i;

  3800. 

  3801.     if(size < 4){

  3802.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  3803.         return size;

  3804.     }

  3805.     for(i = 0; i < size; i++, src++) {

  3806.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  3807.             dst[dsize++] = src[1];

  3808.             src++;

  3809.             i++;

  3810.         } else

  3811.             dst[dsize++] = *src;

  3812.     }

  3813.     return dsize;

  3814. }

  3815. 

  3816. /** Initialize a VC1/WMV3 decoder

  3817.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3818.  * @todo TODO: Decypher remaining bits in extra_data

  3819.  */

  3820. static int vc1_decode_init(AVCodecContext *avctx)

  3821. {

  3822.     VC1Context *v = avctx->priv_data;

  3823.     MpegEncContext *s = &v->s;

  3824.     GetBitContext gb;

  3825. 

  3826.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  3827.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  3828.         avctx->pix_fmt = PIX_FMT_YUV420P;

  3829.     else

  3830.         avctx->pix_fmt = PIX_FMT_GRAY8;

  3831.     v->s.avctx = avctx;

  3832.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  3833.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  3834. 

  3835.     if(ff_h263_decode_init(avctx) < 0)

  3836.         return -1;

  3837.     if (vc1_init_common(v) < 0) return -1;

  3838. 

  3839.     avctx->coded_width = avctx->width;

  3840.     avctx->coded_height = avctx->height;

  3841.     if (avctx->codec_id == CODEC_ID_WMV3)

  3842.     {

  3843.         int count = 0;

  3844. 

  3845.         // looks like WMV3 has a sequence header stored in the extradata

  3846.         // advanced sequence header may be before the first frame

  3847.         // the last byte of the extradata is a version number, 1 for the

  3848.         // samples we can decode

  3849. 

  3850.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  3851. 

  3852.         if (decode_sequence_header(avctx, &gb) < 0)

  3853.           return -1;

  3854. 

  3855.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  3856.         if (count>0)

  3857.         {

  3858.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  3859.                    count, get_bits(&gb, count));

  3860.         }

  3861.         else if (count < 0)

  3862.         {

  3863.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  3864.         }

  3865.     } else { // VC1/WVC1

  3866.         uint8_t *start = avctx->extradata, *end = avctx->extradata + avctx->extradata_size;

  3867.         uint8_t *next; int size, buf2_size;

  3868.         uint8_t *buf2 = NULL;

  3869.         int seq_inited = 0, ep_inited = 0;

  3870. 

  3871.         if(avctx->extradata_size < 16) {

  3872.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  3873.             return -1;

  3874.         }

  3875. 

  3876.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  3877.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  3878.         next = start;

  3879.         for(; next < end; start = next){

  3880.             next = find_next_marker(start + 4, end);

  3881.             size = next - start - 4;

  3882.             if(size <= 0) continue;

  3883.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  3884.             init_get_bits(&gb, buf2, buf2_size * 8);

  3885.             switch(AV_RB32(start)){

  3886.             case VC1_CODE_SEQHDR:

  3887.                 if(decode_sequence_header(avctx, &gb) < 0){

  3888.                     av_free(buf2);

  3889.                     return -1;

  3890.                 }

  3891.                 seq_inited = 1;

  3892.                 break;

  3893.             case VC1_CODE_ENTRYPOINT:

  3894.                 if(decode_entry_point(avctx, &gb) < 0){

  3895.                     av_free(buf2);

  3896.                     return -1;

  3897.                 }

  3898.                 ep_inited = 1;

  3899.                 break;

  3900.             }

  3901.         }

  3902.         av_free(buf2);

  3903.         if(!seq_inited || !ep_inited){

  3904.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  3905.             return -1;

  3906.         }

  3907.     }

  3908.     avctx->has_b_frames= !!(avctx->max_b_frames);

  3909.     s->low_delay = !avctx->has_b_frames;

  3910. 

  3911.     s->mb_width = (avctx->coded_width+15)>>4;

  3912.     s->mb_height = (avctx->coded_height+15)>>4;

  3913. 

  3914.     /* Allocate mb bitplanes */

  3915.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  3916.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  3917.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  3918.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  3919. 

  3920.     /* allocate block type info in that way so it could be used with s->block_index[] */

  3921.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  3922.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  3923.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  3924.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  3925. 

  3926.     /* Init coded blocks info */

  3927.     if (v->profile == PROFILE_ADVANCED)

  3928.     {

  3929. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  3930. //            return -1;

  3931. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  3932. //            return -1;

  3933.     }

  3934. 

  3935.     return 0;

  3936. }

  3937. 

  3938. 

  3939. /** Decode a VC1/WMV3 frame

  3940.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3941.  */

  3942. static int vc1_decode_frame(AVCodecContext *avctx,

  3943.                             void *data, int *data_size,

  3944.                             uint8_t *buf, int buf_size)

  3945. {

  3946.     VC1Context *v = avctx->priv_data;

  3947.     MpegEncContext *s = &v->s;

  3948.     AVFrame *pict = data;

  3949.     uint8_t *buf2 = NULL;

  3950. 

  3951.     /* no supplementary picture */

  3952.     if (buf_size == 0) {

  3953.         /* special case for last picture */

  3954.         if (s->low_delay==0 && s->next_picture_ptr) {

  3955.             *pict= *(AVFrame*)s->next_picture_ptr;

  3956.             s->next_picture_ptr= NULL;

  3957. 

  3958.             *data_size = sizeof(AVFrame);

  3959.         }

  3960. 

  3961.         return 0;

  3962.     }

  3963. 

  3964.     /* We need to set current_picture_ptr before reading the header,

  3965.      * otherwise we cannot store anything in there. */

  3966.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  3967.         int i= ff_find_unused_picture(s, 0);

  3968.         s->current_picture_ptr= &s->picture[i];

  3969.     }

  3970. 

  3971.     //for advanced profile we may need to parse and unescape data

  3972.     if (avctx->codec_id == CODEC_ID_VC1) {

  3973.         int buf_size2 = 0;

  3974.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  3975. 

  3976.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  3977.             uint8_t *start, *end, *next;

  3978.             int size;

  3979. 

  3980.             next = buf;

  3981.             for(start = buf, end = buf + buf_size; next < end; start = next){

  3982.                 next = find_next_marker(start + 4, end);

  3983.                 size = next - start - 4;

  3984.                 if(size <= 0) continue;

  3985.                 switch(AV_RB32(start)){

  3986.                 case VC1_CODE_FRAME:

  3987.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  3988.                     break;

  3989.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  3990.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  3991.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  3992.                     decode_entry_point(avctx, &s->gb);

  3993.                     break;

  3994.                 case VC1_CODE_SLICE:

  3995.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  3996.                     av_free(buf2);

  3997.                     return -1;

  3998.                 }

  3999.             }

  4000.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4001.             uint8_t *divider;

  4002. 

  4003.             divider = find_next_marker(buf, buf + buf_size);

  4004.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4005.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4006.                 return -1;

  4007.             }

  4008. 

  4009.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4010.             // TODO

  4011.             av_free(buf2);return -1;

  4012.         }else{

  4013.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4014.         }

  4015.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4016.     } else

  4017.         init_get_bits(&s->gb, buf, buf_size*8);

  4018.     // do parse frame header

  4019.     if(v->profile < PROFILE_ADVANCED) {

  4020.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4021.             av_free(buf2);

  4022.             return -1;

  4023.         }

  4024.     } else {

  4025.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4026.             av_free(buf2);

  4027.             return -1;

  4028.         }

  4029.     }

  4030. 

  4031.     if(s->pict_type != I_TYPE && !v->res_rtm_flag){

  4032.         av_free(buf2);

  4033.         return -1;

  4034.     }

  4035. 

  4036.     // for hurry_up==5

  4037.     s->current_picture.pict_type= s->pict_type;

  4038.     s->current_picture.key_frame= s->pict_type == I_TYPE;

  4039. 

  4040.     /* skip B-frames if we don't have reference frames */

  4041.     if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)){

  4042.         av_free(buf2);

  4043.         return -1;//buf_size;

  4044.     }

  4045.     /* skip b frames if we are in a hurry */

  4046.     if(avctx->hurry_up && s->pict_type==B_TYPE) return -1;//buf_size;

  4047.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)

  4048.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)

  4049.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4050.         av_free(buf2);

  4051.         return buf_size;

  4052.     }

  4053.     /* skip everything if we are in a hurry>=5 */

  4054.     if(avctx->hurry_up>=5) {

  4055.         av_free(buf2);

  4056.         return -1;//buf_size;

  4057.     }

  4058. 

  4059.     if(s->next_p_frame_damaged){

  4060.         if(s->pict_type==B_TYPE)

  4061.             return buf_size;

  4062.         else

  4063.             s->next_p_frame_damaged=0;

  4064.     }

  4065. 

  4066.     if(MPV_frame_start(s, avctx) < 0) {

  4067.         av_free(buf2);

  4068.         return -1;

  4069.     }

  4070. 

  4071.     ff_er_frame_start(s);

  4072. 

  4073.     v->bits = buf_size * 8;

  4074.     vc1_decode_blocks(v);

  4075. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4076. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4077. //      return -1;

  4078.     ff_er_frame_end(s);

  4079. 

  4080.     MPV_frame_end(s);

  4081. 

  4082. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4083. assert(s->current_picture.pict_type == s->pict_type);

  4084.     if (s->pict_type == B_TYPE || s->low_delay) {

  4085.         *pict= *(AVFrame*)s->current_picture_ptr;

  4086.     } else if (s->last_picture_ptr != NULL) {

  4087.         *pict= *(AVFrame*)s->last_picture_ptr;

  4088.     }

  4089. 

  4090.     if(s->last_picture_ptr || s->low_delay){

  4091.         *data_size = sizeof(AVFrame);

  4092.         ff_print_debug_info(s, pict);

  4093.     }

  4094. 

  4095.     /* Return the Picture timestamp as the frame number */

  4096.     /* we substract 1 because it is added on utils.c    */

  4097.     avctx->frame_number = s->picture_number - 1;

  4098. 

  4099.     av_free(buf2);

  4100.     return buf_size;

  4101. }

  4102. 

  4103. 

  4104. /** Close a VC1/WMV3 decoder

  4105.  * @warning Initial try at using MpegEncContext stuff

  4106.  */

  4107. static int vc1_decode_end(AVCodecContext *avctx)

  4108. {

  4109.     VC1Context *v = avctx->priv_data;

  4110. 

  4111.     av_freep(&v->hrd_rate);

  4112.     av_freep(&v->hrd_buffer);

  4113.     MPV_common_end(&v->s);

  4114.     av_freep(&v->mv_type_mb_plane);

  4115.     av_freep(&v->direct_mb_plane);

  4116.     av_freep(&v->acpred_plane);

  4117.     av_freep(&v->over_flags_plane);

  4118.     av_freep(&v->mb_type_base);

  4119.     return 0;

  4120. }

  4121. 

  4122. 

  4123. AVCodec vc1_decoder = {

  4124.     "vc1",

  4125.     CODEC_TYPE_VIDEO,

  4126.     CODEC_ID_VC1,

  4127.     sizeof(VC1Context),

  4128.     vc1_decode_init,

  4129.     NULL,

  4130.     vc1_decode_end,

  4131.     vc1_decode_frame,

  4132.     CODEC_CAP_DELAY,

  4133.     NULL

  4134. };

  4135. 

  4136. AVCodec wmv3_decoder = {

  4137.     "wmv3",

  4138.     CODEC_TYPE_VIDEO,

  4139.     CODEC_ID_WMV3,

  4140.     sizeof(VC1Context),

  4141.     vc1_decode_init,

  4142.     NULL,

  4143.     vc1_decode_end,

  4144.     vc1_decode_frame,

  4145.     CODEC_CAP_DELAY,

  4146.     NULL

  4147. };