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FFmpeg/libavcodec/vc1.c

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  1. /*

  2.  * VC-1 and WMV3 decoder

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

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

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file libavcodec/vc1.c

  25.  * VC-1 and WMV3 decoder

  26.  *

  27.  */

  28. #include "internal.h"

  29. #include "dsputil.h"

  30. #include "avcodec.h"

  31. #include "mpegvideo.h"

  32. #include "vc1.h"

  33. #include "vc1data.h"

  34. #include "vc1acdata.h"

  35. #include "msmpeg4data.h"

  36. #include "unary.h"

  37. #include "simple_idct.h"

  38. #include "mathops.h"

  39. #include "vdpau_internal.h"

  40. 

  41. #undef NDEBUG

  42. #include <assert.h>

  43. 

  44. #define MB_INTRA_VLC_BITS 9

  45. #define DC_VLC_BITS 9

  46. #define AC_VLC_BITS 9

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

  48. 

  49. 

  50. static const uint16_t vlc_offs[] = {

  51.        0,   520,   552,   616,  1128,  1160, 1224, 1740, 1772, 1836, 1900, 2436,

  52.     2986,  3050,  3610,  4154,  4218,  4746, 5326, 5390, 5902, 6554, 7658, 8620,

  53.     9262, 10202, 10756, 11310, 12228, 15078

  54. };

  55. 

  56. /**

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

  58.  * @param v The VC1Context to initialize

  59.  * @return Status

  60.  */

  61. static int vc1_init_common(VC1Context *v)

  62. {

  63.     static int done = 0;

  64.     int i = 0;

  65.     static VLC_TYPE vlc_table[15078][2];

  66. 

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

  68. 

  69.     /* VLC tables */

  70.     if(!done)

  71.     {

  72.         INIT_VLC_STATIC(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  73.                  ff_vc1_bfraction_bits, 1, 1,

  74.                  ff_vc1_bfraction_codes, 1, 1, 1 << VC1_BFRACTION_VLC_BITS);

  75.         INIT_VLC_STATIC(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  76.                  ff_vc1_norm2_bits, 1, 1,

  77.                  ff_vc1_norm2_codes, 1, 1, 1 << VC1_NORM2_VLC_BITS);

  78.         INIT_VLC_STATIC(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  79.                  ff_vc1_norm6_bits, 1, 1,

  80.                  ff_vc1_norm6_codes, 2, 2, 556);

  81.         INIT_VLC_STATIC(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  82.                  ff_vc1_imode_bits, 1, 1,

  83.                  ff_vc1_imode_codes, 1, 1, 1 << VC1_IMODE_VLC_BITS);

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

  85.         {

  86.             ff_vc1_ttmb_vlc[i].table = &vlc_table[vlc_offs[i*3+0]];

  87.             ff_vc1_ttmb_vlc[i].table_allocated = vlc_offs[i*3+1] - vlc_offs[i*3+0];

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

  89.                      ff_vc1_ttmb_bits[i], 1, 1,

  90.                      ff_vc1_ttmb_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  91.             ff_vc1_ttblk_vlc[i].table = &vlc_table[vlc_offs[i*3+1]];

  92.             ff_vc1_ttblk_vlc[i].table_allocated = vlc_offs[i*3+2] - vlc_offs[i*3+1];

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

  94.                      ff_vc1_ttblk_bits[i], 1, 1,

  95.                      ff_vc1_ttblk_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  96.             ff_vc1_subblkpat_vlc[i].table = &vlc_table[vlc_offs[i*3+2]];

  97.             ff_vc1_subblkpat_vlc[i].table_allocated = vlc_offs[i*3+3] - vlc_offs[i*3+2];

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

  99.                      ff_vc1_subblkpat_bits[i], 1, 1,

  100.                      ff_vc1_subblkpat_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  101.         }

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

  103.         {

  104.             ff_vc1_4mv_block_pattern_vlc[i].table = &vlc_table[vlc_offs[i*3+9]];

  105.             ff_vc1_4mv_block_pattern_vlc[i].table_allocated = vlc_offs[i*3+10] - vlc_offs[i*3+9];

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

  107.                      ff_vc1_4mv_block_pattern_bits[i], 1, 1,

  108.                      ff_vc1_4mv_block_pattern_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

  109.             ff_vc1_cbpcy_p_vlc[i].table = &vlc_table[vlc_offs[i*3+10]];

  110.             ff_vc1_cbpcy_p_vlc[i].table_allocated = vlc_offs[i*3+11] - vlc_offs[i*3+10];

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

  112.                      ff_vc1_cbpcy_p_bits[i], 1, 1,

  113.                      ff_vc1_cbpcy_p_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  114.             ff_vc1_mv_diff_vlc[i].table = &vlc_table[vlc_offs[i*3+11]];

  115.             ff_vc1_mv_diff_vlc[i].table_allocated = vlc_offs[i*3+12] - vlc_offs[i*3+11];

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

  117.                      ff_vc1_mv_diff_bits[i], 1, 1,

  118.                      ff_vc1_mv_diff_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);

  119.         }

  120.         for(i=0; i<8; i++){

  121.             ff_vc1_ac_coeff_table[i].table = &vlc_table[vlc_offs[i+21]];

  122.             ff_vc1_ac_coeff_table[i].table_allocated = vlc_offs[i+22] - vlc_offs[i+21];

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

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

  125.                      &vc1_ac_tables[i][0][0], 8, 4, INIT_VLC_USE_NEW_STATIC);

  126.         }

  127.         //FIXME: switching to INIT_VLC_STATIC() results in incorrect decoding

  128.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

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

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

  131.         done = 1;

  132.     }

  133. 

  134.     /* Other defaults */

  135.     v->pq = -1;

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

  137. 

  138.     return 0;

  139. }

  140. 

  141. /***********************************************************************/

  142. /**

  143.  * @defgroup vc1bitplane VC-1 Bitplane decoding

  144.  * @see 8.7, p56

  145.  * @{

  146.  */

  147. 

  148. /**

  149.  * Imode types

  150.  * @{

  151.  */

  152. enum Imode {

  153.     IMODE_RAW,

  154.     IMODE_NORM2,

  155.     IMODE_DIFF2,

  156.     IMODE_NORM6,

  157.     IMODE_DIFF6,

  158.     IMODE_ROWSKIP,

  159.     IMODE_COLSKIP

  160. };

  161. /** @} */ //imode defines

  162. 

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

  164.  * @param plane Buffer to store decoded bits

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

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

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

  168.  */

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

  170.     int x, y;

  171. 

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

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

  174.             memset(plane, 0, width);

  175.         else

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

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

  178.         plane += stride;

  179.     }

  180. }

  181. 

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

  183.  * @param plane Buffer to store decoded bits

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

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

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

  187.  * @todo FIXME: Optimize

  188.  */

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

  190.     int x, y;

  191. 

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

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

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

  195.                 plane[y*stride] = 0;

  196.         else

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

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

  199.         plane ++;

  200.     }

  201. }

  202. 

  203. /** Decode a bitplane's bits

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

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

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

  207.  * @return Status

  208.  * @todo FIXME: Optimize

  209.  */

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

  211. {

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

  213. 

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

  215.     uint8_t invert, *planep = data;

  216.     int width, height, stride;

  217. 

  218.     width = v->s.mb_width;

  219.     height = v->s.mb_height;

  220.     stride = v->s.mb_stride;

  221.     invert = get_bits1(gb);

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

  223. 

  224.     *raw_flag = 0;

  225.     switch (imode)

  226.     {

  227.     case IMODE_RAW:

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

  229.         *raw_flag = 1; //invert ignored

  230.         return invert;

  231.     case IMODE_DIFF2:

  232.     case IMODE_NORM2:

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

  234.         {

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

  236.             offset = 1;

  237.         }

  238.         else offset = 0;

  239.         // decode bitplane as one long line

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

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

  242.             *planep++ = code & 1;

  243.             offset++;

  244.             if(offset == width) {

  245.                 offset = 0;

  246.                 planep += stride - width;

  247.             }

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

  249.             offset++;

  250.             if(offset == width) {

  251.                 offset = 0;

  252.                 planep += stride - width;

  253.             }

  254.         }

  255.         break;

  256.     case IMODE_DIFF6:

  257.     case IMODE_NORM6:

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

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

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

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

  262.                     if(code < 0){

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

  264.                         return -1;

  265.                     }

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

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

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

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

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

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

  272.                 }

  273.                 planep += stride * 3;

  274.             }

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

  276.         } else { // 3x2

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

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

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

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

  281.                     if(code < 0){

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

  283.                         return -1;

  284.                     }

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

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

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

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

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

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

  291.                 }

  292.                 planep += stride * 2;

  293.             }

  294.             x = width % 3;

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

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

  297.         }

  298.         break;

  299.     case IMODE_ROWSKIP:

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

  301.         break;

  302.     case IMODE_COLSKIP:

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

  304.         break;

  305.     default: break;

  306.     }

  307. 

  308.     /* Applying diff operator */

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

  310.     {

  311.         planep = data;

  312.         planep[0] ^= invert;

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

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

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

  316.         {

  317.             planep += stride;

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

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

  320.             {

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

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

  323.             }

  324.         }

  325.     }

  326.     else if (invert)

  327.     {

  328.         planep = data;

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

  330.     }

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

  332. }

  333. 

  334. /** @} */ //Bitplane group

  335. 

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

  337. {

  338.     int i, j;

  339.     if(!s->first_slice_line)

  340.         s->dsp.vc1_v_loop_filter16(s->dest[0], s->linesize, pq);

  341.     s->dsp.vc1_v_loop_filter16(s->dest[0] + 8*s->linesize, s->linesize, pq);

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

  343.         s->dsp.vc1_h_loop_filter16(s->dest[0] + i, s->linesize, pq);

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

  345.         if(!s->first_slice_line)

  346.             s->dsp.vc1_v_loop_filter8(s->dest[j+1], s->uvlinesize, pq);

  347.         if(s->mb_x)

  348.             s->dsp.vc1_h_loop_filter8(s->dest[j+1], s->uvlinesize, pq);

  349.     }

  350. }

  351. 

  352. /***********************************************************************/

  353. /** VOP Dquant decoding

  354.  * @param v VC-1 Context

  355.  */

  356. static int vop_dquant_decoding(VC1Context *v)

  357. {

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

  359.     int pqdiff;

  360. 

  361.     //variable size

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

  363.     {

  364.         pqdiff = get_bits(gb, 3);

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

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

  367.     }

  368.     else

  369.     {

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

  371.         if ( v->dquantfrm )

  372.         {

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

  374.             switch (v->dqprofile)

  375.             {

  376.             case DQPROFILE_SINGLE_EDGE:

  377.             case DQPROFILE_DOUBLE_EDGES:

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

  379.                 break;

  380.             case DQPROFILE_ALL_MBS:

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

  382.                 if(!v->dqbilevel)

  383.                     v->halfpq = 0;

  384.             default: break; //Forbidden ?

  385.             }

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

  387.             {

  388.                 pqdiff = get_bits(gb, 3);

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

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

  391.             }

  392.         }

  393.     }

  394.     return 0;

  395. }

  396. 

  397. /** Put block onto picture

  398.  */

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

  400. {

  401.     uint8_t *Y;

  402.     int ys, us, vs;

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

  404. 

  405.     if(v->rangeredfrm) {

  406.         int i, j, k;

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

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

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

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

  411. 

  412.     }

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

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

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

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

  417. 

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

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

  420.     Y += ys * 8;

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

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

  423. 

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

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

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

  427.     }

  428. }

  429. 

  430. /** Do motion compensation over 1 macroblock

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

  432.  */

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

  434. {

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

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

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

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

  439. 

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

  441. 

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

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

  444. 

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

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

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

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

  449.     }

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

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

  452.     if(v->fastuvmc) {

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

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

  455.     }

  456.     if(!dir) {

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

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

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

  460.     } else {

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

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

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

  464.     }

  465. 

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

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

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

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

  470. 

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

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

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

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

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

  476.     }else{

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

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

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

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

  481.     }

  482. 

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

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

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

  486. 

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

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

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

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

  491.     }

  492. 

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

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

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

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

  497. 

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

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

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

  501.         srcY = s->edge_emu_buffer;

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

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

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

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

  506.         srcU = uvbuf;

  507.         srcV = uvbuf + 16;

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

  509.         if(v->rangeredfrm) {

  510.             int i, j;

  511.             uint8_t *src, *src2;

  512. 

  513.             src = srcY;

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

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

  516.                 src += s->linesize;

  517.             }

  518.             src = srcU; src2 = srcV;

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

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

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

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

  523.                 }

  524.                 src += s->uvlinesize;

  525.                 src2 += s->uvlinesize;

  526.             }

  527.         }

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

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

  530.             int i, j;

  531.             uint8_t *src, *src2;

  532. 

  533.             src = srcY;

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

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

  536.                 src += s->linesize;

  537.             }

  538.             src = srcU; src2 = srcV;

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

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

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

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

  543.                 }

  544.                 src += s->uvlinesize;

  545.                 src2 += s->uvlinesize;

  546.             }

  547.         }

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

  549.     }

  550. 

  551.     if(s->mspel) {

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

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

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

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

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

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

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

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

  560. 

  561.         if(!v->rnd)

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

  563.         else

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

  565.     }

  566. 

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

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

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

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

  571.     if(!v->rnd){

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

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

  574.     }else{

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

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

  577.     }

  578. }

  579. 

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

  581.  */

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

  583. {

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

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

  586.     uint8_t *srcY;

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

  588.     int off;

  589. 

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

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

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

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

  594. 

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

  596. 

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

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

  599. 

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

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

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

  603.     }else{

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

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

  606.     }

  607. 

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

  609. 

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

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

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

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

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

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

  616.         srcY = s->edge_emu_buffer;

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

  618.         if(v->rangeredfrm) {

  619.             int i, j;

  620.             uint8_t *src;

  621. 

  622.             src = srcY;

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

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

  625.                 src += s->linesize;

  626.             }

  627.         }

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

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

  630.             int i, j;

  631.             uint8_t *src;

  632. 

  633.             src = srcY;

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

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

  636.                 src += s->linesize;

  637.             }

  638.         }

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

  640.     }

  641. 

  642.     if(s->mspel) {

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

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

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

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

  647.         if(!v->rnd)

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

  649.         else

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

  651.     }

  652. }

  653. 

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

  655. {

  656.     if(a < b) {

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

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

  659.     } else {

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

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

  662.     }

  663. }

  664. 

  665. 

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

  667.  */

  668. static void vc1_mc_4mv_chroma(VC1Context *v)

  669. {

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

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

  672.     uint8_t *srcU, *srcV;

  673.     int uvmx, uvmy, uvsrc_x, uvsrc_y;

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

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

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

  677. 

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

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

  680. 

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

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

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

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

  685.     }

  686. 

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

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

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

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

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

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

  693.         switch(idx) {

  694.         case 0x1:

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

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

  697.             break;

  698.         case 0x2:

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

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

  701.             break;

  702.         case 0x4:

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

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

  705.             break;

  706.         case 0x8:

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

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

  709.             break;

  710.         }

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

  712.         int t1 = 0, t2 = 0;

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

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

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

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

  717.     } else {

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

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

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

  721.     }

  722. 

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

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

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

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

  727.     if(v->fastuvmc) {

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

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

  730.     }

  731. 

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

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

  734. 

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

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

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

  738.     }else{

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

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

  741.     }

  742. 

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

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

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

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

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

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

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

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

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

  752.         srcU = s->edge_emu_buffer;

  753.         srcV = s->edge_emu_buffer + 16;

  754. 

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

  756.         if(v->rangeredfrm) {

  757.             int i, j;

  758.             uint8_t *src, *src2;

  759. 

  760.             src = srcU; src2 = srcV;

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

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

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

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

  765.                 }

  766.                 src += s->uvlinesize;

  767.                 src2 += s->uvlinesize;

  768.             }

  769.         }

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

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

  772.             int i, j;

  773.             uint8_t *src, *src2;

  774. 

  775.             src = srcU; src2 = srcV;

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

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

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

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

  780.                 }

  781.                 src += s->uvlinesize;

  782.                 src2 += s->uvlinesize;

  783.             }

  784.         }

  785.     }

  786. 

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

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

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

  790.     if(!v->rnd){

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

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

  793.     }else{

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

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

  796.     }

  797. }

  798. 

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

  800. 

  801. /**

  802.  * Decode Simple/Main Profiles sequence header

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

  804.  * @param avctx Codec context

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

  806.  * @return Status

  807.  */

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

  809. {

  810.     VC1Context *v = avctx->priv_data;

  811. 

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

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

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

  815.     {

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

  817.     }

  818. 

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

  820.     {

  821.         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;

  822.         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;

  823.         return decode_sequence_header_adv(v, gb);

  824.     }

  825.     else

  826.     {

  827.         v->zz_8x4 = wmv2_scantableA;

  828.         v->zz_4x8 = wmv2_scantableB;

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

  830.         if (v->res_sm)

  831.         {

  832.             av_log(avctx, AV_LOG_ERROR,

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

  834.             return -1;

  835.         }

  836.     }

  837. 

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

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

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

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

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

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

  844.     {

  845.         av_log(avctx, AV_LOG_ERROR,

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

  847.     }

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

  849.         v->s.loop_filter = 0;

  850. 

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

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

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

  854.     if (!v->res_fasttx)

  855.     {

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

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

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

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

  860.     }

  861. 

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

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

  864.     {

  865.         av_log(avctx, AV_LOG_ERROR,

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

  867.         return -1;

  868.     }

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

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

  871.     {

  872.         av_log(avctx, AV_LOG_ERROR,

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

  874.         return -1;

  875.     }

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

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

  878. 

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

  880.     if (v->res_transtab)

  881.     {

  882.         av_log(avctx, AV_LOG_ERROR,

  883.                "1 for reserved RES_TRANSTAB is forbidden\n");

  884.         return -1;

  885.     }

  886. 

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

  888. 

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

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

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

  892.     {

  893.         av_log(avctx, AV_LOG_INFO,

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

  895.     }

  896. 

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

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

  899. 

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

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

  902.     if (!v->res_rtm_flag)

  903.     {

  904. //            av_log(avctx, AV_LOG_ERROR,

  905. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  906.         av_log(avctx, AV_LOG_ERROR,

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

  908.         //return -1;

  909.     }

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

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

  912.     av_log(avctx, AV_LOG_DEBUG,

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

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

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

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

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

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

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

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

  921.                );

  922.     return 0;

  923. }

  924. 

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

  926. {

  927.     v->res_rtm_flag = 1;

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

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

  930.     {

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

  932.     }

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

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

  935.     {

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

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

  938.         return -1;

  939.     }

  940. 

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

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

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

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

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

  946. 

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

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

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

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

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

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

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

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

  955.     skip_bits1(gb); // reserved

  956. 

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

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

  959. 

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

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

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

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

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

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

  966.                v->tfcntrflag, v->finterpflag

  967.                );

  968. 

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

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

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

  972.         return -1;

  973.     }

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

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

  976.         int w, h, ar = 0;

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

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

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

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

  981.         if(get_bits1(gb))

  982.             ar = get_bits(gb, 4);

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

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

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

  986.             w = get_bits(gb, 8);

  987.             h = get_bits(gb, 8);

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

  989.         }

  990.         av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n", v->s.avctx->sample_aspect_ratio.num, v->s.avctx->sample_aspect_ratio.den);

  991. 

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

  993.             if(get_bits1(gb)) {

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

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

  996.             } else {

  997.                 int nr, dr;

  998.                 nr = get_bits(gb, 8);

  999.                 dr = get_bits(gb, 4);

  1000.                 if(nr && nr < 8 && dr && dr < 3){

  1001.                     v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];

  1002.                     v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;

  1003.                 }

  1004.             }

  1005.         }

  1006. 

  1007.         if(get_bits1(gb)){

  1008.             v->color_prim = get_bits(gb, 8);

  1009.             v->transfer_char = get_bits(gb, 8);

  1010.             v->matrix_coef = get_bits(gb, 8);

  1011.         }

  1012.     }

  1013. 

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

  1015.     if(v->hrd_param_flag) {

  1016.         int i;

  1017.         v->hrd_num_leaky_buckets = get_bits(gb, 5);

  1018.         skip_bits(gb, 4); //bitrate exponent

  1019.         skip_bits(gb, 4); //buffer size exponent

  1020.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1021.             skip_bits(gb, 16); //hrd_rate[n]

  1022.             skip_bits(gb, 16); //hrd_buffer[n]

  1023.         }

  1024.     }

  1025.     return 0;

  1026. }

  1027. 

  1028. static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)

  1029. {

  1030.     VC1Context *v = avctx->priv_data;

  1031.     int i;

  1032. 

  1033.     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));

  1034.     v->broken_link = get_bits1(gb);

  1035.     v->closed_entry = get_bits1(gb);

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

  1037.     v->refdist_flag = get_bits1(gb);

  1038.     v->s.loop_filter = get_bits1(gb);

  1039.     v->fastuvmc = get_bits1(gb);

  1040.     v->extended_mv = get_bits1(gb);

  1041.     v->dquant = get_bits(gb, 2);

  1042.     v->vstransform = get_bits1(gb);

  1043.     v->overlap = get_bits1(gb);

  1044.     v->quantizer_mode = get_bits(gb, 2);

  1045. 

  1046.     if(v->hrd_param_flag){

  1047.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1048.             skip_bits(gb, 8); //hrd_full[n]

  1049.         }

  1050.     }

  1051. 

  1052.     if(get_bits1(gb)){

  1053.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1054.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1055.     }

  1056.     if(v->extended_mv)

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

  1058.     if((v->range_mapy_flag = get_bits1(gb))) {

  1059.         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");

  1060.         v->range_mapy = get_bits(gb, 3);

  1061.     }

  1062.     if((v->range_mapuv_flag = get_bits1(gb))) {

  1063.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1064.         v->range_mapuv = get_bits(gb, 3);

  1065.     }

  1066. 

  1067.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1068.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1069.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1070.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1071.         v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,

  1072.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1073. 

  1074.     return 0;

  1075. }

  1076. 

  1077. static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1078. {

  1079.     int pqindex, lowquant, status;

  1080. 

  1081.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1082.     skip_bits(gb, 2); //framecnt unused

  1083.     v->rangeredfrm = 0;

  1084.     if (v->rangered) v->rangeredfrm = get_bits1(gb);

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

  1086.     if (v->s.avctx->max_b_frames) {

  1087.         if (!v->s.pict_type) {

  1088.             if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;

  1089.             else v->s.pict_type = FF_B_TYPE;

  1090.         } else v->s.pict_type = FF_P_TYPE;

  1091.     } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;

  1092. 

  1093.     v->bi_type = 0;

  1094.     if(v->s.pict_type == FF_B_TYPE) {

  1095.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1096.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1097.         if(v->bfraction == 0) {

  1098.             v->s.pict_type = FF_BI_TYPE;

  1099.         }

  1100.     }

  1101.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1102.         skip_bits(gb, 7); // skip buffer fullness

  1103. 

  1104.     /* calculate RND */

  1105.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1106.         v->rnd = 1;

  1107.     if(v->s.pict_type == FF_P_TYPE)

  1108.         v->rnd ^= 1;

  1109. 

  1110.     /* Quantizer stuff */

  1111.     pqindex = get_bits(gb, 5);

  1112.     if(!pqindex) return -1;

  1113.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1114.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1115.     else

  1116.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1117. 

  1118.     v->pquantizer = 1;

  1119.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1120.         v->pquantizer = pqindex < 9;

  1121.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1122.         v->pquantizer = 0;

  1123.     v->pqindex = pqindex;

  1124.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1125.     else v->halfpq = 0;

  1126.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1127.         v->pquantizer = get_bits1(gb);

  1128.     v->dquantfrm = 0;

  1129.     if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);

  1130.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1131.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1132.     v->range_x = 1 << (v->k_x - 1);

  1133.     v->range_y = 1 << (v->k_y - 1);

  1134.     if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);

  1135. 

  1136.     if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){

  1137.         v->x8_type = get_bits1(gb);

  1138.     }else v->x8_type = 0;

  1139. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1140. //        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1141. 

  1142.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1143. 

  1144.     switch(v->s.pict_type) {

  1145.     case FF_P_TYPE:

  1146.         if (v->pq < 5) v->tt_index = 0;

  1147.         else if(v->pq < 13) v->tt_index = 1;

  1148.         else v->tt_index = 2;

  1149. 

  1150.         lowquant = (v->pq > 12) ? 0 : 1;

  1151.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

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

  1153.         {

  1154.             int scale, shift, i;

  1155.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1156.             v->lumscale = get_bits(gb, 6);

  1157.             v->lumshift = get_bits(gb, 6);

  1158.             v->use_ic = 1;

  1159.             /* fill lookup tables for intensity compensation */

  1160.             if(!v->lumscale) {

  1161.                 scale = -64;

  1162.                 shift = (255 - v->lumshift * 2) << 6;

  1163.                 if(v->lumshift > 31)

  1164.                     shift += 128 << 6;

  1165.             } else {

  1166.                 scale = v->lumscale + 32;

  1167.                 if(v->lumshift > 31)

  1168.                     shift = (v->lumshift - 64) << 6;

  1169.                 else

  1170.                     shift = v->lumshift << 6;

  1171.             }

  1172.             for(i = 0; i < 256; i++) {

  1173.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1174.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1175.             }

  1176.         }

  1177.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1178.             v->s.quarter_sample = 0;

  1179.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1180.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1181.                 v->s.quarter_sample = 0;

  1182.             else

  1183.                 v->s.quarter_sample = 1;

  1184.         } else

  1185.             v->s.quarter_sample = 1;

  1186.         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));

  1187. 

  1188.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1189.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1190.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1191.         {

  1192.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1193.             if (status < 0) return -1;

  1194.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1195.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1196.         } else {

  1197.             v->mv_type_is_raw = 0;

  1198.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1199.         }

  1200.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1201.         if (status < 0) return -1;

  1202.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1203.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1204. 

  1205.         /* Hopefully this is correct for P frames */

  1206.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1207.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1208. 

  1209.         if (v->dquant)

  1210.         {

  1211.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1212.             vop_dquant_decoding(v);

  1213.         }

  1214. 

  1215.         v->ttfrm = 0; //FIXME Is that so ?

  1216.         if (v->vstransform)

  1217.         {

  1218.             v->ttmbf = get_bits1(gb);

  1219.             if (v->ttmbf)

  1220.             {

  1221.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1222.             }

  1223.         } else {

  1224.             v->ttmbf = 1;

  1225.             v->ttfrm = TT_8X8;

  1226.         }

  1227.         break;

  1228.     case FF_B_TYPE:

  1229.         if (v->pq < 5) v->tt_index = 0;

  1230.         else if(v->pq < 13) v->tt_index = 1;

  1231.         else v->tt_index = 2;

  1232. 

  1233.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1234.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1235.         v->s.mspel = v->s.quarter_sample;

  1236. 

  1237.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1238.         if (status < 0) return -1;

  1239.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1240.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1241.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1242.         if (status < 0) return -1;

  1243.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1244.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1245. 

  1246.         v->s.mv_table_index = get_bits(gb, 2);

  1247.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1248. 

  1249.         if (v->dquant)

  1250.         {

  1251.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1252.             vop_dquant_decoding(v);

  1253.         }

  1254. 

  1255.         v->ttfrm = 0;

  1256.         if (v->vstransform)

  1257.         {

  1258.             v->ttmbf = get_bits1(gb);

  1259.             if (v->ttmbf)

  1260.             {

  1261.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1262.             }

  1263.         } else {

  1264.             v->ttmbf = 1;

  1265.             v->ttfrm = TT_8X8;

  1266.         }

  1267.         break;

  1268.     }

  1269. 

  1270.     if(!v->x8_type)

  1271.     {

  1272.         /* AC Syntax */

  1273.         v->c_ac_table_index = decode012(gb);

  1274.         if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1275.         {

  1276.             v->y_ac_table_index = decode012(gb);

  1277.         }

  1278.         /* DC Syntax */

  1279.         v->s.dc_table_index = get_bits1(gb);

  1280.     }

  1281. 

  1282.     if(v->s.pict_type == FF_BI_TYPE) {

  1283.         v->s.pict_type = FF_B_TYPE;

  1284.         v->bi_type = 1;

  1285.     }

  1286.     return 0;

  1287. }

  1288. 

  1289. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1290. {

  1291.     int pqindex, lowquant;

  1292.     int status;

  1293. 

  1294.     v->p_frame_skipped = 0;

  1295. 

  1296.     if(v->interlace){

  1297.         v->fcm = decode012(gb);

  1298.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1299.     }

  1300.     switch(get_unary(gb, 0, 4)) {

  1301.     case 0:

  1302.         v->s.pict_type = FF_P_TYPE;

  1303.         break;

  1304.     case 1:

  1305.         v->s.pict_type = FF_B_TYPE;

  1306.         break;

  1307.     case 2:

  1308.         v->s.pict_type = FF_I_TYPE;

  1309.         break;

  1310.     case 3:

  1311.         v->s.pict_type = FF_BI_TYPE;

  1312.         break;

  1313.     case 4:

  1314.         v->s.pict_type = FF_P_TYPE; // skipped pic

  1315.         v->p_frame_skipped = 1;

  1316.         return 0;

  1317.     }

  1318.     if(v->tfcntrflag)

  1319.         skip_bits(gb, 8);

  1320.     if(v->broadcast) {

  1321.         if(!v->interlace || v->psf) {

  1322.             v->rptfrm = get_bits(gb, 2);

  1323.         } else {

  1324.             v->tff = get_bits1(gb);

  1325.             v->rptfrm = get_bits1(gb);

  1326.         }

  1327.     }

  1328.     if(v->panscanflag) {

  1329.         //...

  1330.     }

  1331.     v->rnd = get_bits1(gb);

  1332.     if(v->interlace)

  1333.         v->uvsamp = get_bits1(gb);

  1334.     if(v->finterpflag) v->interpfrm = get_bits1(gb);

  1335.     if(v->s.pict_type == FF_B_TYPE) {

  1336.         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1337.         v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];

  1338.         if(v->bfraction == 0) {

  1339.             v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */

  1340.         }

  1341.     }

  1342.     pqindex = get_bits(gb, 5);

  1343.     if(!pqindex) return -1;

  1344.     v->pqindex = pqindex;

  1345.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1346.         v->pq = ff_vc1_pquant_table[0][pqindex];

  1347.     else

  1348.         v->pq = ff_vc1_pquant_table[1][pqindex];

  1349. 

  1350.     v->pquantizer = 1;

  1351.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1352.         v->pquantizer = pqindex < 9;

  1353.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1354.         v->pquantizer = 0;

  1355.     v->pqindex = pqindex;

  1356.     if (pqindex < 9) v->halfpq = get_bits1(gb);

  1357.     else v->halfpq = 0;

  1358.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1359.         v->pquantizer = get_bits1(gb);

  1360.     if(v->postprocflag)

  1361.         v->postproc = get_bits(gb, 2);

  1362. 

  1363.     if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;

  1364. 

  1365.     switch(v->s.pict_type) {

  1366.     case FF_I_TYPE:

  1367.     case FF_BI_TYPE:

  1368.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1369.         if (status < 0) return -1;

  1370.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1371.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1372.         v->condover = CONDOVER_NONE;

  1373.         if(v->overlap && v->pq <= 8) {

  1374.             v->condover = decode012(gb);

  1375.             if(v->condover == CONDOVER_SELECT) {

  1376.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1377.                 if (status < 0) return -1;

  1378.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1379.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1380.             }

  1381.         }

  1382.         break;

  1383.     case FF_P_TYPE:

  1384.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1385.         else v->mvrange = 0;

  1386.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1387.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1388.         v->range_x = 1 << (v->k_x - 1);

  1389.         v->range_y = 1 << (v->k_y - 1);

  1390. 

  1391.         if (v->pq < 5) v->tt_index = 0;

  1392.         else if(v->pq < 13) v->tt_index = 1;

  1393.         else v->tt_index = 2;

  1394. 

  1395.         lowquant = (v->pq > 12) ? 0 : 1;

  1396.         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];

  1397.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1398.         {

  1399.             int scale, shift, i;

  1400.             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];

  1401.             v->lumscale = get_bits(gb, 6);

  1402.             v->lumshift = get_bits(gb, 6);

  1403.             /* fill lookup tables for intensity compensation */

  1404.             if(!v->lumscale) {

  1405.                 scale = -64;

  1406.                 shift = (255 - v->lumshift * 2) << 6;

  1407.                 if(v->lumshift > 31)

  1408.                     shift += 128 << 6;

  1409.             } else {

  1410.                 scale = v->lumscale + 32;

  1411.                 if(v->lumshift > 31)

  1412.                     shift = (v->lumshift - 64) << 6;

  1413.                 else

  1414.                     shift = v->lumshift << 6;

  1415.             }

  1416.             for(i = 0; i < 256; i++) {

  1417.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1418.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1419.             }

  1420.             v->use_ic = 1;

  1421.         }

  1422.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1423.             v->s.quarter_sample = 0;

  1424.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1425.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1426.                 v->s.quarter_sample = 0;

  1427.             else

  1428.                 v->s.quarter_sample = 1;

  1429.         } else

  1430.             v->s.quarter_sample = 1;

  1431.         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));

  1432. 

  1433.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1434.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1435.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1436.         {

  1437.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1438.             if (status < 0) return -1;

  1439.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1440.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1441.         } else {

  1442.             v->mv_type_is_raw = 0;

  1443.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1444.         }

  1445.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1446.         if (status < 0) return -1;

  1447.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1448.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1449. 

  1450.         /* Hopefully this is correct for P frames */

  1451.         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables

  1452.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1453.         if (v->dquant)

  1454.         {

  1455.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1456.             vop_dquant_decoding(v);

  1457.         }

  1458. 

  1459.         v->ttfrm = 0; //FIXME Is that so ?

  1460.         if (v->vstransform)

  1461.         {

  1462.             v->ttmbf = get_bits1(gb);

  1463.             if (v->ttmbf)

  1464.             {

  1465.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1466.             }

  1467.         } else {

  1468.             v->ttmbf = 1;

  1469.             v->ttfrm = TT_8X8;

  1470.         }

  1471.         break;

  1472.     case FF_B_TYPE:

  1473.         if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);

  1474.         else v->mvrange = 0;

  1475.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1476.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1477.         v->range_x = 1 << (v->k_x - 1);

  1478.         v->range_y = 1 << (v->k_y - 1);

  1479. 

  1480.         if (v->pq < 5) v->tt_index = 0;

  1481.         else if(v->pq < 13) v->tt_index = 1;

  1482.         else v->tt_index = 2;

  1483. 

  1484.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1485.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1486.         v->s.mspel = v->s.quarter_sample;

  1487. 

  1488.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1489.         if (status < 0) return -1;

  1490.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1491.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1492.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1493.         if (status < 0) return -1;

  1494.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1495.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1496. 

  1497.         v->s.mv_table_index = get_bits(gb, 2);

  1498.         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1499. 

  1500.         if (v->dquant)

  1501.         {

  1502.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1503.             vop_dquant_decoding(v);

  1504.         }

  1505. 

  1506.         v->ttfrm = 0;

  1507.         if (v->vstransform)

  1508.         {

  1509.             v->ttmbf = get_bits1(gb);

  1510.             if (v->ttmbf)

  1511.             {

  1512.                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];

  1513.             }

  1514.         } else {

  1515.             v->ttmbf = 1;

  1516.             v->ttfrm = TT_8X8;

  1517.         }

  1518.         break;

  1519.     }

  1520. 

  1521.     /* AC Syntax */

  1522.     v->c_ac_table_index = decode012(gb);

  1523.     if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)

  1524.     {

  1525.         v->y_ac_table_index = decode012(gb);

  1526.     }

  1527.     /* DC Syntax */

  1528.     v->s.dc_table_index = get_bits1(gb);

  1529.     if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {

  1530.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1531.         vop_dquant_decoding(v);

  1532.     }

  1533. 

  1534.     v->bi_type = 0;

  1535.     if(v->s.pict_type == FF_BI_TYPE) {

  1536.         v->s.pict_type = FF_B_TYPE;

  1537.         v->bi_type = 1;

  1538.     }

  1539.     return 0;

  1540. }

  1541. 

  1542. /***********************************************************************/

  1543. /**

  1544.  * @defgroup vc1block VC-1 Block-level functions

  1545.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1546.  * @{

  1547.  */

  1548. 

  1549. /**

  1550.  * @def GET_MQUANT

  1551.  * @brief Get macroblock-level quantizer scale

  1552.  */

  1553. #define GET_MQUANT()                                           \

  1554.   if (v->dquantfrm)                                            \

  1555.   {                                                            \

  1556.     int edges = 0;                                             \

  1557.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1558.     {                                                          \

  1559.       if (v->dqbilevel)                                        \

  1560.       {                                                        \

  1561.         mquant = (get_bits1(gb)) ? v->altpq : v->pq;           \

  1562.       }                                                        \

  1563.       else                                                     \

  1564.       {                                                        \

  1565.         mqdiff = get_bits(gb, 3);                              \

  1566.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1567.         else mquant = get_bits(gb, 5);                         \

  1568.       }                                                        \

  1569.     }                                                          \

  1570.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1571.         edges = 1 << v->dqsbedge;                              \

  1572.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1573.         edges = (3 << v->dqsbedge) % 15;                       \

  1574.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1575.         edges = 15;                                            \

  1576.     if((edges&1) && !s->mb_x)                                  \

  1577.         mquant = v->altpq;                                     \

  1578.     if((edges&2) && s->first_slice_line)                       \

  1579.         mquant = v->altpq;                                     \

  1580.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1581.         mquant = v->altpq;                                     \

  1582.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1583.         mquant = v->altpq;                                     \

  1584.   }

  1585. 

  1586. /**

  1587.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1588.  * @brief Get MV differentials

  1589.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1590.  * @param _dmv_x Horizontal differential for decoded MV

  1591.  * @param _dmv_y Vertical differential for decoded MV

  1592.  */

  1593. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1594.   index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\

  1595.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1596.   if (index > 36)                                                   \

  1597.   {                                                                 \

  1598.     mb_has_coeffs = 1;                                              \

  1599.     index -= 37;                                                    \

  1600.   }                                                                 \

  1601.   else mb_has_coeffs = 0;                                           \

  1602.   s->mb_intra = 0;                                                  \

  1603.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1604.   else if (index == 35)                                             \

  1605.   {                                                                 \

  1606.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1607.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1608.   }                                                                 \

  1609.   else if (index == 36)                                             \

  1610.   {                                                                 \

  1611.     _dmv_x = 0;                                                     \

  1612.     _dmv_y = 0;                                                     \

  1613.     s->mb_intra = 1;                                                \

  1614.   }                                                                 \

  1615.   else                                                              \

  1616.   {                                                                 \

  1617.     index1 = index%6;                                               \

  1618.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1619.     else                                   val = 0;                 \

  1620.     if(size_table[index1] - val > 0)                                \

  1621.         val = get_bits(gb, size_table[index1] - val);               \

  1622.     else                                   val = 0;                 \

  1623.     sign = 0 - (val&1);                                             \

  1624.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1625.                                                                     \

  1626.     index1 = index/6;                                               \

  1627.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1628.     else                                   val = 0;                 \

  1629.     if(size_table[index1] - val > 0)                                \

  1630.         val = get_bits(gb, size_table[index1] - val);               \

  1631.     else                                   val = 0;                 \

  1632.     sign = 0 - (val&1);                                             \

  1633.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1634.   }

  1635. 

  1636. /** Predict and set motion vector

  1637.  */

  1638. 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)

  1639. {

  1640.     int xy, wrap, off = 0;

  1641.     int16_t *A, *B, *C;

  1642.     int px, py;

  1643.     int sum;

  1644. 

  1645.     /* scale MV difference to be quad-pel */

  1646.     dmv_x <<= 1 - s->quarter_sample;

  1647.     dmv_y <<= 1 - s->quarter_sample;

  1648. 

  1649.     wrap = s->b8_stride;

  1650.     xy = s->block_index[n];

  1651. 

  1652.     if(s->mb_intra){

  1653.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  1654.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

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

  1656.         s->current_picture.motion_val[1][xy][1] = 0;

  1657.         if(mv1) { /* duplicate motion data for 1-MV block */

  1658.             s->current_picture.motion_val[0][xy + 1][0] = 0;

  1659.             s->current_picture.motion_val[0][xy + 1][1] = 0;

  1660.             s->current_picture.motion_val[0][xy + wrap][0] = 0;

  1661.             s->current_picture.motion_val[0][xy + wrap][1] = 0;

  1662.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  1663.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  1664.             s->current_picture.motion_val[1][xy + 1][0] = 0;

  1665.             s->current_picture.motion_val[1][xy + 1][1] = 0;

  1666.             s->current_picture.motion_val[1][xy + wrap][0] = 0;

  1667.             s->current_picture.motion_val[1][xy + wrap][1] = 0;

  1668.             s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;

  1669.             s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;

  1670.         }

  1671.         return;

  1672.     }

  1673. 

  1674.     C = s->current_picture.motion_val[0][xy - 1];

  1675.     A = s->current_picture.motion_val[0][xy - wrap];

  1676.     if(mv1)

  1677.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  1678.     else {

  1679.         //in 4-MV mode different blocks have different B predictor position

  1680.         switch(n){

  1681.         case 0:

  1682.             off = (s->mb_x > 0) ? -1 : 1;

  1683.             break;

  1684.         case 1:

  1685.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  1686.             break;

  1687.         case 2:

  1688.             off = 1;

  1689.             break;

  1690.         case 3:

  1691.             off = -1;

  1692.         }

  1693.     }

  1694.     B = s->current_picture.motion_val[0][xy - wrap + off];

  1695. 

  1696.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  1697.         if(s->mb_width == 1) {

  1698.             px = A[0];

  1699.             py = A[1];

  1700.         } else {

  1701.             px = mid_pred(A[0], B[0], C[0]);

  1702.             py = mid_pred(A[1], B[1], C[1]);

  1703.         }

  1704.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  1705.         px = C[0];

  1706.         py = C[1];

  1707.     } else {

  1708.         px = py = 0;

  1709.     }

  1710.     /* Pullback MV as specified in 8.3.5.3.4 */

  1711.     {

  1712.         int qx, qy, X, Y;

  1713.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  1714.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  1715.         X = (s->mb_width << 6) - 4;

  1716.         Y = (s->mb_height << 6) - 4;

  1717.         if(mv1) {

  1718.             if(qx + px < -60) px = -60 - qx;

  1719.             if(qy + py < -60) py = -60 - qy;

  1720.         } else {

  1721.             if(qx + px < -28) px = -28 - qx;

  1722.             if(qy + py < -28) py = -28 - qy;

  1723.         }

  1724.         if(qx + px > X) px = X - qx;

  1725.         if(qy + py > Y) py = Y - qy;

  1726.     }

  1727.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  1728.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  1729.         if(is_intra[xy - wrap])

  1730.             sum = FFABS(px) + FFABS(py);

  1731.         else

  1732.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  1733.         if(sum > 32) {

  1734.             if(get_bits1(&s->gb)) {

  1735.                 px = A[0];

  1736.                 py = A[1];

  1737.             } else {

  1738.                 px = C[0];

  1739.                 py = C[1];

  1740.             }

  1741.         } else {

  1742.             if(is_intra[xy - 1])

  1743.                 sum = FFABS(px) + FFABS(py);

  1744.             else

  1745.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  1746.             if(sum > 32) {

  1747.                 if(get_bits1(&s->gb)) {

  1748.                     px = A[0];

  1749.                     py = A[1];

  1750.                 } else {

  1751.                     px = C[0];

  1752.                     py = C[1];

  1753.                 }

  1754.             }

  1755.         }

  1756.     }

  1757.     /* store MV using signed modulus of MV range defined in 4.11 */

  1758.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  1759.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  1760.     if(mv1) { /* duplicate motion data for 1-MV block */

  1761.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  1762.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  1763.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  1764.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  1765.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  1766.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  1767.     }

  1768. }

  1769. 

  1770. /** Motion compensation for direct or interpolated blocks in B-frames

  1771.  */

  1772. static void vc1_interp_mc(VC1Context *v)

  1773. {

  1774.     MpegEncContext *s = &v->s;

  1775.     DSPContext *dsp = &v->s.dsp;

  1776.     uint8_t *srcY, *srcU, *srcV;

  1777.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  1778. 

  1779.     if(!v->s.next_picture.data[0])return;

  1780. 

  1781.     mx = s->mv[1][0][0];

  1782.     my = s->mv[1][0][1];

  1783.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  1784.     uvmy = (my + ((my & 3) == 3)) >> 1;

  1785.     if(v->fastuvmc) {

  1786.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  1787.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  1788.     }

  1789.     srcY = s->next_picture.data[0];

  1790.     srcU = s->next_picture.data[1];

  1791.     srcV = s->next_picture.data[2];

  1792. 

  1793.     src_x = s->mb_x * 16 + (mx >> 2);

  1794.     src_y = s->mb_y * 16 + (my >> 2);

  1795.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1796.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1797. 

  1798.     if(v->profile != PROFILE_ADVANCED){

  1799.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  1800.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  1801.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1802.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1803.     }else{

  1804.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  1805.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  1806.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1807.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1808.     }

  1809. 

  1810.     srcY += src_y * s->linesize + src_x;

  1811.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  1812.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  1813. 

  1814.     /* for grayscale we should not try to read from unknown area */

  1815.     if(s->flags & CODEC_FLAG_GRAY) {

  1816.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  1817.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  1818.     }

  1819. 

  1820.     if(v->rangeredfrm

  1821.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  1822.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  1823.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  1824. 

  1825.         srcY -= s->mspel * (1 + s->linesize);

  1826.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  1827.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  1828.         srcY = s->edge_emu_buffer;

  1829.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  1830.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1831.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1832.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1833.         srcU = uvbuf;

  1834.         srcV = uvbuf + 16;

  1835.         /* if we deal with range reduction we need to scale source blocks */

  1836.         if(v->rangeredfrm) {

  1837.             int i, j;

  1838.             uint8_t *src, *src2;

  1839. 

  1840.             src = srcY;

  1841.             for(j = 0; j < 17 + s->mspel*2; j++) {

  1842.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  1843.                 src += s->linesize;

  1844.             }

  1845.             src = srcU; src2 = srcV;

  1846.             for(j = 0; j < 9; j++) {

  1847.                 for(i = 0; i < 9; i++) {

  1848.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1849.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1850.                 }

  1851.                 src += s->uvlinesize;

  1852.                 src2 += s->uvlinesize;

  1853.             }

  1854.         }

  1855.         srcY += s->mspel * (1 + s->linesize);

  1856.     }

  1857. 

  1858.     if(s->mspel) {

  1859.         dxy = ((my & 3) << 2) | (mx & 3);

  1860.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  1861.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);

  1862.         srcY += s->linesize * 8;

  1863.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  1864.         dsp->avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  1865.     } else { // hpel mc

  1866.         dxy = (my & 2) | ((mx & 2) >> 1);

  1867. 

  1868.         if(!v->rnd)

  1869.             dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1870.         else

  1871.             dsp->avg_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  1872.     }

  1873. 

  1874.     if(s->flags & CODEC_FLAG_GRAY) return;

  1875.     /* Chroma MC always uses qpel blilinear */

  1876.     uvmx = (uvmx&3)<<1;

  1877.     uvmy = (uvmy&3)<<1;

  1878.     if(!v->rnd){

  1879.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1880.         dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1881.     }else{

  1882.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1883.         dsp->avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1884.     }

  1885. }

  1886. 

  1887. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  1888. {

  1889.     int n = bfrac;

  1890. 

  1891. #if B_FRACTION_DEN==256

  1892.     if(inv)

  1893.         n -= 256;

  1894.     if(!qs)

  1895.         return 2 * ((value * n + 255) >> 9);

  1896.     return (value * n + 128) >> 8;

  1897. #else

  1898.     if(inv)

  1899.         n -= B_FRACTION_DEN;

  1900.     if(!qs)

  1901.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  1902.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  1903. #endif

  1904. }

  1905. 

  1906. /** Reconstruct motion vector for B-frame and do motion compensation

  1907.  */

  1908. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  1909. {

  1910.     if(v->use_ic) {

  1911.         v->mv_mode2 = v->mv_mode;

  1912.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  1913.     }

  1914.     if(direct) {

  1915.         vc1_mc_1mv(v, 0);

  1916.         vc1_interp_mc(v);

  1917.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1918.         return;

  1919.     }

  1920.     if(mode == BMV_TYPE_INTERPOLATED) {

  1921.         vc1_mc_1mv(v, 0);

  1922.         vc1_interp_mc(v);

  1923.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  1924.         return;

  1925.     }

  1926. 

  1927.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  1928.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  1929.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  1930. }

  1931. 

  1932. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  1933. {

  1934.     MpegEncContext *s = &v->s;

  1935.     int xy, wrap, off = 0;

  1936.     int16_t *A, *B, *C;

  1937.     int px, py;

  1938.     int sum;

  1939.     int r_x, r_y;

  1940.     const uint8_t *is_intra = v->mb_type[0];

  1941. 

  1942.     r_x = v->range_x;

  1943.     r_y = v->range_y;

  1944.     /* scale MV difference to be quad-pel */

  1945.     dmv_x[0] <<= 1 - s->quarter_sample;

  1946.     dmv_y[0] <<= 1 - s->quarter_sample;

  1947.     dmv_x[1] <<= 1 - s->quarter_sample;

  1948.     dmv_y[1] <<= 1 - s->quarter_sample;

  1949. 

  1950.     wrap = s->b8_stride;

  1951.     xy = s->block_index[0];

  1952. 

  1953.     if(s->mb_intra) {

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

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

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

  1957.         s->current_picture.motion_val[1][xy][1] = 0;

  1958.         return;

  1959.     }

  1960.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  1961.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  1962.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  1963.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  1964. 

  1965.     /* Pullback predicted motion vectors as specified in 8.4.5.4 */

  1966.     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));

  1967.     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));

  1968.     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));

  1969.     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));

  1970.     if(direct) {

  1971.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  1972.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  1973.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  1974.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  1975.         return;

  1976.     }

  1977. 

  1978.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  1979.         C = s->current_picture.motion_val[0][xy - 2];

  1980.         A = s->current_picture.motion_val[0][xy - wrap*2];

  1981.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  1982.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  1983. 

  1984.         if(!s->mb_x) C[0] = C[1] = 0;

  1985.         if(!s->first_slice_line) { // predictor A is not out of bounds

  1986.             if(s->mb_width == 1) {

  1987.                 px = A[0];

  1988.                 py = A[1];

  1989.             } else {

  1990.                 px = mid_pred(A[0], B[0], C[0]);

  1991.                 py = mid_pred(A[1], B[1], C[1]);

  1992.             }

  1993.         } else if(s->mb_x) { // predictor C is not out of bounds

  1994.             px = C[0];

  1995.             py = C[1];

  1996.         } else {

  1997.             px = py = 0;

  1998.         }

  1999.         /* Pullback MV as specified in 8.3.5.3.4 */

  2000.         {

  2001.             int qx, qy, X, Y;

  2002.             if(v->profile < PROFILE_ADVANCED) {

  2003.                 qx = (s->mb_x << 5);

  2004.                 qy = (s->mb_y << 5);

  2005.                 X = (s->mb_width << 5) - 4;

  2006.                 Y = (s->mb_height << 5) - 4;

  2007.                 if(qx + px < -28) px = -28 - qx;

  2008.                 if(qy + py < -28) py = -28 - qy;

  2009.                 if(qx + px > X) px = X - qx;

  2010.                 if(qy + py > Y) py = Y - qy;

  2011.             } else {

  2012.                 qx = (s->mb_x << 6);

  2013.                 qy = (s->mb_y << 6);

  2014.                 X = (s->mb_width << 6) - 4;

  2015.                 Y = (s->mb_height << 6) - 4;

  2016.                 if(qx + px < -60) px = -60 - qx;

  2017.                 if(qy + py < -60) py = -60 - qy;

  2018.                 if(qx + px > X) px = X - qx;

  2019.                 if(qy + py > Y) py = Y - qy;

  2020.             }

  2021.         }

  2022.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2023.         if(0 && !s->first_slice_line && s->mb_x) {

  2024.             if(is_intra[xy - wrap])

  2025.                 sum = FFABS(px) + FFABS(py);

  2026.             else

  2027.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2028.             if(sum > 32) {

  2029.                 if(get_bits1(&s->gb)) {

  2030.                     px = A[0];

  2031.                     py = A[1];

  2032.                 } else {

  2033.                     px = C[0];

  2034.                     py = C[1];

  2035.                 }

  2036.             } else {

  2037.                 if(is_intra[xy - 2])

  2038.                     sum = FFABS(px) + FFABS(py);

  2039.                 else

  2040.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2041.                 if(sum > 32) {

  2042.                     if(get_bits1(&s->gb)) {

  2043.                         px = A[0];

  2044.                         py = A[1];

  2045.                     } else {

  2046.                         px = C[0];

  2047.                         py = C[1];

  2048.                     }

  2049.                 }

  2050.             }

  2051.         }

  2052.         /* store MV using signed modulus of MV range defined in 4.11 */

  2053.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2054.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2055.     }

  2056.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2057.         C = s->current_picture.motion_val[1][xy - 2];

  2058.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2059.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2060.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2061. 

  2062.         if(!s->mb_x) C[0] = C[1] = 0;

  2063.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2064.             if(s->mb_width == 1) {

  2065.                 px = A[0];

  2066.                 py = A[1];

  2067.             } else {

  2068.                 px = mid_pred(A[0], B[0], C[0]);

  2069.                 py = mid_pred(A[1], B[1], C[1]);

  2070.             }

  2071.         } else if(s->mb_x) { // predictor C is not out of bounds

  2072.             px = C[0];

  2073.             py = C[1];

  2074.         } else {

  2075.             px = py = 0;

  2076.         }

  2077.         /* Pullback MV as specified in 8.3.5.3.4 */

  2078.         {

  2079.             int qx, qy, X, Y;

  2080.             if(v->profile < PROFILE_ADVANCED) {

  2081.                 qx = (s->mb_x << 5);

  2082.                 qy = (s->mb_y << 5);

  2083.                 X = (s->mb_width << 5) - 4;

  2084.                 Y = (s->mb_height << 5) - 4;

  2085.                 if(qx + px < -28) px = -28 - qx;

  2086.                 if(qy + py < -28) py = -28 - qy;

  2087.                 if(qx + px > X) px = X - qx;

  2088.                 if(qy + py > Y) py = Y - qy;

  2089.             } else {

  2090.                 qx = (s->mb_x << 6);

  2091.                 qy = (s->mb_y << 6);

  2092.                 X = (s->mb_width << 6) - 4;

  2093.                 Y = (s->mb_height << 6) - 4;

  2094.                 if(qx + px < -60) px = -60 - qx;

  2095.                 if(qy + py < -60) py = -60 - qy;

  2096.                 if(qx + px > X) px = X - qx;

  2097.                 if(qy + py > Y) py = Y - qy;

  2098.             }

  2099.         }

  2100.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2101.         if(0 && !s->first_slice_line && s->mb_x) {

  2102.             if(is_intra[xy - wrap])

  2103.                 sum = FFABS(px) + FFABS(py);

  2104.             else

  2105.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2106.             if(sum > 32) {

  2107.                 if(get_bits1(&s->gb)) {

  2108.                     px = A[0];

  2109.                     py = A[1];

  2110.                 } else {

  2111.                     px = C[0];

  2112.                     py = C[1];

  2113.                 }

  2114.             } else {

  2115.                 if(is_intra[xy - 2])

  2116.                     sum = FFABS(px) + FFABS(py);

  2117.                 else

  2118.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2119.                 if(sum > 32) {

  2120.                     if(get_bits1(&s->gb)) {

  2121.                         px = A[0];

  2122.                         py = A[1];

  2123.                     } else {

  2124.                         px = C[0];

  2125.                         py = C[1];

  2126.                     }

  2127.                 }

  2128.             }

  2129.         }

  2130.         /* store MV using signed modulus of MV range defined in 4.11 */

  2131. 

  2132.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2133.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2134.     }

  2135.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2136.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2137.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2138.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2139. }

  2140. 

  2141. /** Get predicted DC value for I-frames only

  2142.  * prediction dir: left=0, top=1

  2143.  * @param s MpegEncContext

  2144.  * @param overlap flag indicating that overlap filtering is used

  2145.  * @param pq integer part of picture quantizer

  2146.  * @param[in] n block index in the current MB

  2147.  * @param dc_val_ptr Pointer to DC predictor

  2148.  * @param dir_ptr Prediction direction for use in AC prediction

  2149.  */

  2150. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2151.                               int16_t **dc_val_ptr, int *dir_ptr)

  2152. {

  2153.     int a, b, c, wrap, pred, scale;

  2154.     int16_t *dc_val;

  2155.     static const uint16_t dcpred[32] = {

  2156.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2157.          114,  102,   93,   85,   79,   73,   68,   64,

  2158.           60,   57,   54,   51,   49,   47,   45,   43,

  2159.           41,   39,   38,   37,   35,   34,   33

  2160.     };

  2161. 

  2162.     /* find prediction - wmv3_dc_scale always used here in fact */

  2163.     if (n < 4)     scale = s->y_dc_scale;

  2164.     else           scale = s->c_dc_scale;

  2165. 

  2166.     wrap = s->block_wrap[n];

  2167.     dc_val= s->dc_val[0] + s->block_index[n];

  2168. 

  2169.     /* B A

  2170.      * C X

  2171.      */

  2172.     c = dc_val[ - 1];

  2173.     b = dc_val[ - 1 - wrap];

  2174.     a = dc_val[ - wrap];

  2175. 

  2176.     if (pq < 9 || !overlap)

  2177.     {

  2178.         /* Set outer values */

  2179.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2180.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2181.     }

  2182.     else

  2183.     {

  2184.         /* Set outer values */

  2185.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2186.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2187.     }

  2188. 

  2189.     if (abs(a - b) <= abs(b - c)) {

  2190.         pred = c;

  2191.         *dir_ptr = 1;//left

  2192.     } else {

  2193.         pred = a;

  2194.         *dir_ptr = 0;//top

  2195.     }

  2196. 

  2197.     /* update predictor */

  2198.     *dc_val_ptr = &dc_val[0];

  2199.     return pred;

  2200. }

  2201. 

  2202. 

  2203. /** Get predicted DC value

  2204.  * prediction dir: left=0, top=1

  2205.  * @param s MpegEncContext

  2206.  * @param overlap flag indicating that overlap filtering is used

  2207.  * @param pq integer part of picture quantizer

  2208.  * @param[in] n block index in the current MB

  2209.  * @param a_avail flag indicating top block availability

  2210.  * @param c_avail flag indicating left block availability

  2211.  * @param dc_val_ptr Pointer to DC predictor

  2212.  * @param dir_ptr Prediction direction for use in AC prediction

  2213.  */

  2214. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2215.                               int a_avail, int c_avail,

  2216.                               int16_t **dc_val_ptr, int *dir_ptr)

  2217. {

  2218.     int a, b, c, wrap, pred;

  2219.     int16_t *dc_val;

  2220.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2221.     int q1, q2 = 0;

  2222. 

  2223.     wrap = s->block_wrap[n];

  2224.     dc_val= s->dc_val[0] + s->block_index[n];

  2225. 

  2226.     /* B A

  2227.      * C X

  2228.      */

  2229.     c = dc_val[ - 1];

  2230.     b = dc_val[ - 1 - wrap];

  2231.     a = dc_val[ - wrap];

  2232.     /* scale predictors if needed */

  2233.     q1 = s->current_picture.qscale_table[mb_pos];

  2234.     if(c_avail && (n!= 1 && n!=3)) {

  2235.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2236.         if(q2 && q2 != q1)

  2237.             c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2238.     }

  2239.     if(a_avail && (n!= 2 && n!=3)) {

  2240.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2241.         if(q2 && q2 != q1)

  2242.             a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2243.     }

  2244.     if(a_avail && c_avail && (n!=3)) {

  2245.         int off = mb_pos;

  2246.         if(n != 1) off--;

  2247.         if(n != 2) off -= s->mb_stride;

  2248.         q2 = s->current_picture.qscale_table[off];

  2249.         if(q2 && q2 != q1)

  2250.             b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2251.     }

  2252. 

  2253.     if(a_avail && c_avail) {

  2254.         if(abs(a - b) <= abs(b - c)) {

  2255.             pred = c;

  2256.             *dir_ptr = 1;//left

  2257.         } else {

  2258.             pred = a;

  2259.             *dir_ptr = 0;//top

  2260.         }

  2261.     } else if(a_avail) {

  2262.         pred = a;

  2263.         *dir_ptr = 0;//top

  2264.     } else if(c_avail) {

  2265.         pred = c;

  2266.         *dir_ptr = 1;//left

  2267.     } else {

  2268.         pred = 0;

  2269.         *dir_ptr = 1;//left

  2270.     }

  2271. 

  2272.     /* update predictor */

  2273.     *dc_val_ptr = &dc_val[0];

  2274.     return pred;

  2275. }

  2276. 

  2277. /** @} */ // Block group

  2278. 

  2279. /**

  2280.  * @defgroup vc1_std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2281.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2282.  * @{

  2283.  */

  2284. 

  2285. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2286. {

  2287.     int xy, wrap, pred, a, b, c;

  2288. 

  2289.     xy = s->block_index[n];

  2290.     wrap = s->b8_stride;

  2291. 

  2292.     /* B C

  2293.      * A X

  2294.      */

  2295.     a = s->coded_block[xy - 1       ];

  2296.     b = s->coded_block[xy - 1 - wrap];

  2297.     c = s->coded_block[xy     - wrap];

  2298. 

  2299.     if (b == c) {

  2300.         pred = a;

  2301.     } else {

  2302.         pred = c;

  2303.     }

  2304. 

  2305.     /* store value */

  2306.     *coded_block_ptr = &s->coded_block[xy];

  2307. 

  2308.     return pred;

  2309. }

  2310. 

  2311. /**

  2312.  * Decode one AC coefficient

  2313.  * @param v The VC1 context

  2314.  * @param last Last coefficient

  2315.  * @param skip How much zero coefficients to skip

  2316.  * @param value Decoded AC coefficient value

  2317.  * @param codingset set of VLC to decode data

  2318.  * @see 8.1.3.4

  2319.  */

  2320. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2321. {

  2322.     GetBitContext *gb = &v->s.gb;

  2323.     int index, escape, run = 0, level = 0, lst = 0;

  2324. 

  2325.     index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2326.     if (index != vc1_ac_sizes[codingset] - 1) {

  2327.         run = vc1_index_decode_table[codingset][index][0];

  2328.         level = vc1_index_decode_table[codingset][index][1];

  2329.         lst = index >= vc1_last_decode_table[codingset];

  2330.         if(get_bits1(gb))

  2331.             level = -level;

  2332.     } else {

  2333.         escape = decode210(gb);

  2334.         if (escape != 2) {

  2335.             index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2336.             run = vc1_index_decode_table[codingset][index][0];

  2337.             level = vc1_index_decode_table[codingset][index][1];

  2338.             lst = index >= vc1_last_decode_table[codingset];

  2339.             if(escape == 0) {

  2340.                 if(lst)

  2341.                     level += vc1_last_delta_level_table[codingset][run];

  2342.                 else

  2343.                     level += vc1_delta_level_table[codingset][run];

  2344.             } else {

  2345.                 if(lst)

  2346.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2347.                 else

  2348.                     run += vc1_delta_run_table[codingset][level] + 1;

  2349.             }

  2350.             if(get_bits1(gb))

  2351.                 level = -level;

  2352.         } else {

  2353.             int sign;

  2354.             lst = get_bits1(gb);

  2355.             if(v->s.esc3_level_length == 0) {

  2356.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2357.                     v->s.esc3_level_length = get_bits(gb, 3);

  2358.                     if(!v->s.esc3_level_length)

  2359.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2360.                 } else { //table 60

  2361.                     v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;

  2362.                 }

  2363.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2364.             }

  2365.             run = get_bits(gb, v->s.esc3_run_length);

  2366.             sign = get_bits1(gb);

  2367.             level = get_bits(gb, v->s.esc3_level_length);

  2368.             if(sign)

  2369.                 level = -level;

  2370.         }

  2371.     }

  2372. 

  2373.     *last = lst;

  2374.     *skip = run;

  2375.     *value = level;

  2376. }

  2377. 

  2378. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2379.  * @param v VC1Context

  2380.  * @param block block to decode

  2381.  * @param[in] n subblock index

  2382.  * @param coded are AC coeffs present or not

  2383.  * @param codingset set of VLC to decode data

  2384.  */

  2385. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2386. {

  2387.     GetBitContext *gb = &v->s.gb;

  2388.     MpegEncContext *s = &v->s;

  2389.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2390.     int run_diff, i;

  2391.     int16_t *dc_val;

  2392.     int16_t *ac_val, *ac_val2;

  2393.     int dcdiff;

  2394. 

  2395.     /* Get DC differential */

  2396.     if (n < 4) {

  2397.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2398.     } else {

  2399.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2400.     }

  2401.     if (dcdiff < 0){

  2402.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2403.         return -1;

  2404.     }

  2405.     if (dcdiff)

  2406.     {

  2407.         if (dcdiff == 119 /* ESC index value */)

  2408.         {

  2409.             /* TODO: Optimize */

  2410.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2411.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2412.             else dcdiff = get_bits(gb, 8);

  2413.         }

  2414.         else

  2415.         {

  2416.             if (v->pq == 1)

  2417.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2418.             else if (v->pq == 2)

  2419.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2420.         }

  2421.         if (get_bits1(gb))

  2422.             dcdiff = -dcdiff;

  2423.     }

  2424. 

  2425.     /* Prediction */

  2426.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2427.     *dc_val = dcdiff;

  2428. 

  2429.     /* Store the quantized DC coeff, used for prediction */

  2430.     if (n < 4) {

  2431.         block[0] = dcdiff * s->y_dc_scale;

  2432.     } else {

  2433.         block[0] = dcdiff * s->c_dc_scale;

  2434.     }

  2435.     /* Skip ? */

  2436.     run_diff = 0;

  2437.     if (!coded) {

  2438.         goto not_coded;

  2439.     }

  2440. 

  2441.     //AC Decoding

  2442.     i = 1;

  2443. 

  2444.     {

  2445.         int last = 0, skip, value;

  2446.         const int8_t *zz_table;

  2447.         int scale;

  2448.         int k;

  2449. 

  2450.         scale = v->pq * 2 + v->halfpq;

  2451. 

  2452.         if(v->s.ac_pred) {

  2453.             if(!dc_pred_dir)

  2454.                 zz_table = wmv1_scantable[2];

  2455.             else

  2456.                 zz_table = wmv1_scantable[3];

  2457.         } else

  2458.             zz_table = wmv1_scantable[1];

  2459. 

  2460.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2461.         ac_val2 = ac_val;

  2462.         if(dc_pred_dir) //left

  2463.             ac_val -= 16;

  2464.         else //top

  2465.             ac_val -= 16 * s->block_wrap[n];

  2466. 

  2467.         while (!last) {

  2468.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2469.             i += skip;

  2470.             if(i > 63)

  2471.                 break;

  2472.             block[zz_table[i++]] = value;

  2473.         }

  2474. 

  2475.         /* apply AC prediction if needed */

  2476.         if(s->ac_pred) {

  2477.             if(dc_pred_dir) { //left

  2478.                 for(k = 1; k < 8; k++)

  2479.                     block[k << 3] += ac_val[k];

  2480.             } else { //top

  2481.                 for(k = 1; k < 8; k++)

  2482.                     block[k] += ac_val[k + 8];

  2483.             }

  2484.         }

  2485.         /* save AC coeffs for further prediction */

  2486.         for(k = 1; k < 8; k++) {

  2487.             ac_val2[k] = block[k << 3];

  2488.             ac_val2[k + 8] = block[k];

  2489.         }

  2490. 

  2491.         /* scale AC coeffs */

  2492.         for(k = 1; k < 64; k++)

  2493.             if(block[k]) {

  2494.                 block[k] *= scale;

  2495.                 if(!v->pquantizer)

  2496.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2497.             }

  2498. 

  2499.         if(s->ac_pred) i = 63;

  2500.     }

  2501. 

  2502. not_coded:

  2503.     if(!coded) {

  2504.         int k, scale;

  2505.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2506.         ac_val2 = ac_val;

  2507. 

  2508.         i = 0;

  2509.         scale = v->pq * 2 + v->halfpq;

  2510.         memset(ac_val2, 0, 16 * 2);

  2511.         if(dc_pred_dir) {//left

  2512.             ac_val -= 16;

  2513.             if(s->ac_pred)

  2514.                 memcpy(ac_val2, ac_val, 8 * 2);

  2515.         } else {//top

  2516.             ac_val -= 16 * s->block_wrap[n];

  2517.             if(s->ac_pred)

  2518.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2519.         }

  2520. 

  2521.         /* apply AC prediction if needed */

  2522.         if(s->ac_pred) {

  2523.             if(dc_pred_dir) { //left

  2524.                 for(k = 1; k < 8; k++) {

  2525.                     block[k << 3] = ac_val[k] * scale;

  2526.                     if(!v->pquantizer && block[k << 3])

  2527.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2528.                 }

  2529.             } else { //top

  2530.                 for(k = 1; k < 8; k++) {

  2531.                     block[k] = ac_val[k + 8] * scale;

  2532.                     if(!v->pquantizer && block[k])

  2533.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2534.                 }

  2535.             }

  2536.             i = 63;

  2537.         }

  2538.     }

  2539.     s->block_last_index[n] = i;

  2540. 

  2541.     return 0;

  2542. }

  2543. 

  2544. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2545.  * @param v VC1Context

  2546.  * @param block block to decode

  2547.  * @param[in] n subblock number

  2548.  * @param coded are AC coeffs present or not

  2549.  * @param codingset set of VLC to decode data

  2550.  * @param mquant quantizer value for this macroblock

  2551.  */

  2552. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2553. {

  2554.     GetBitContext *gb = &v->s.gb;

  2555.     MpegEncContext *s = &v->s;

  2556.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2557.     int run_diff, i;

  2558.     int16_t *dc_val;

  2559.     int16_t *ac_val, *ac_val2;

  2560.     int dcdiff;

  2561.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2562.     int use_pred = s->ac_pred;

  2563.     int scale;

  2564.     int q1, q2 = 0;

  2565.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2566. 

  2567.     /* Get DC differential */

  2568.     if (n < 4) {

  2569.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2570.     } else {

  2571.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2572.     }

  2573.     if (dcdiff < 0){

  2574.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2575.         return -1;

  2576.     }

  2577.     if (dcdiff)

  2578.     {

  2579.         if (dcdiff == 119 /* ESC index value */)

  2580.         {

  2581.             /* TODO: Optimize */

  2582.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2583.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2584.             else dcdiff = get_bits(gb, 8);

  2585.         }

  2586.         else

  2587.         {

  2588.             if (mquant == 1)

  2589.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2590.             else if (mquant == 2)

  2591.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2592.         }

  2593.         if (get_bits1(gb))

  2594.             dcdiff = -dcdiff;

  2595.     }

  2596. 

  2597.     /* Prediction */

  2598.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2599.     *dc_val = dcdiff;

  2600. 

  2601.     /* Store the quantized DC coeff, used for prediction */

  2602.     if (n < 4) {

  2603.         block[0] = dcdiff * s->y_dc_scale;

  2604.     } else {

  2605.         block[0] = dcdiff * s->c_dc_scale;

  2606.     }

  2607.     /* Skip ? */

  2608.     run_diff = 0;

  2609. 

  2610.     //AC Decoding

  2611.     i = 1;

  2612. 

  2613.     /* check if AC is needed at all */

  2614.     if(!a_avail && !c_avail) use_pred = 0;

  2615.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2616.     ac_val2 = ac_val;

  2617. 

  2618.     scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);

  2619. 

  2620.     if(dc_pred_dir) //left

  2621.         ac_val -= 16;

  2622.     else //top

  2623.         ac_val -= 16 * s->block_wrap[n];

  2624. 

  2625.     q1 = s->current_picture.qscale_table[mb_pos];

  2626.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2627.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2628.     if(dc_pred_dir && n==1) q2 = q1;

  2629.     if(!dc_pred_dir && n==2) q2 = q1;

  2630.     if(n==3) q2 = q1;

  2631. 

  2632.     if(coded) {

  2633.         int last = 0, skip, value;

  2634.         const int8_t *zz_table;

  2635.         int k;

  2636. 

  2637.         if(v->s.ac_pred) {

  2638.             if(!dc_pred_dir)

  2639.                 zz_table = wmv1_scantable[2];

  2640.             else

  2641.                 zz_table = wmv1_scantable[3];

  2642.         } else

  2643.             zz_table = wmv1_scantable[1];

  2644. 

  2645.         while (!last) {

  2646.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2647.             i += skip;

  2648.             if(i > 63)

  2649.                 break;

  2650.             block[zz_table[i++]] = value;

  2651.         }

  2652. 

  2653.         /* apply AC prediction if needed */

  2654.         if(use_pred) {

  2655.             /* scale predictors if needed*/

  2656.             if(q2 && q1!=q2) {

  2657.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2658.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2659. 

  2660.                 if(dc_pred_dir) { //left

  2661.                     for(k = 1; k < 8; k++)

  2662.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2663.                 } else { //top

  2664.                     for(k = 1; k < 8; k++)

  2665.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2666.                 }

  2667.             } else {

  2668.                 if(dc_pred_dir) { //left

  2669.                     for(k = 1; k < 8; k++)

  2670.                         block[k << 3] += ac_val[k];

  2671.                 } else { //top

  2672.                     for(k = 1; k < 8; k++)

  2673.                         block[k] += ac_val[k + 8];

  2674.                 }

  2675.             }

  2676.         }

  2677.         /* save AC coeffs for further prediction */

  2678.         for(k = 1; k < 8; k++) {

  2679.             ac_val2[k] = block[k << 3];

  2680.             ac_val2[k + 8] = block[k];

  2681.         }

  2682. 

  2683.         /* scale AC coeffs */

  2684.         for(k = 1; k < 64; k++)

  2685.             if(block[k]) {

  2686.                 block[k] *= scale;

  2687.                 if(!v->pquantizer)

  2688.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2689.             }

  2690. 

  2691.         if(use_pred) i = 63;

  2692.     } else { // no AC coeffs

  2693.         int k;

  2694. 

  2695.         memset(ac_val2, 0, 16 * 2);

  2696.         if(dc_pred_dir) {//left

  2697.             if(use_pred) {

  2698.                 memcpy(ac_val2, ac_val, 8 * 2);

  2699.                 if(q2 && q1!=q2) {

  2700.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2701.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2702.                     for(k = 1; k < 8; k++)

  2703.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2704.                 }

  2705.             }

  2706.         } else {//top

  2707.             if(use_pred) {

  2708.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2709.                 if(q2 && q1!=q2) {

  2710.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2711.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2712.                     for(k = 1; k < 8; k++)

  2713.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2714.                 }

  2715.             }

  2716.         }

  2717. 

  2718.         /* apply AC prediction if needed */

  2719.         if(use_pred) {

  2720.             if(dc_pred_dir) { //left

  2721.                 for(k = 1; k < 8; k++) {

  2722.                     block[k << 3] = ac_val2[k] * scale;

  2723.                     if(!v->pquantizer && block[k << 3])

  2724.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2725.                 }

  2726.             } else { //top

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

  2728.                     block[k] = ac_val2[k + 8] * scale;

  2729.                     if(!v->pquantizer && block[k])

  2730.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2731.                 }

  2732.             }

  2733.             i = 63;

  2734.         }

  2735.     }

  2736.     s->block_last_index[n] = i;

  2737. 

  2738.     return 0;

  2739. }

  2740. 

  2741. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  2742.  * @param v VC1Context

  2743.  * @param block block to decode

  2744.  * @param[in] n subblock index

  2745.  * @param coded are AC coeffs present or not

  2746.  * @param mquant block quantizer

  2747.  * @param codingset set of VLC to decode data

  2748.  */

  2749. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  2750. {

  2751.     GetBitContext *gb = &v->s.gb;

  2752.     MpegEncContext *s = &v->s;

  2753.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2754.     int run_diff, i;

  2755.     int16_t *dc_val;

  2756.     int16_t *ac_val, *ac_val2;

  2757.     int dcdiff;

  2758.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2759.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2760.     int use_pred = s->ac_pred;

  2761.     int scale;

  2762.     int q1, q2 = 0;

  2763. 

  2764.     /* XXX: Guard against dumb values of mquant */

  2765.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  2766. 

  2767.     /* Set DC scale - y and c use the same */

  2768.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  2769.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  2770. 

  2771.     /* Get DC differential */

  2772.     if (n < 4) {

  2773.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2774.     } else {

  2775.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2776.     }

  2777.     if (dcdiff < 0){

  2778.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2779.         return -1;

  2780.     }

  2781.     if (dcdiff)

  2782.     {

  2783.         if (dcdiff == 119 /* ESC index value */)

  2784.         {

  2785.             /* TODO: Optimize */

  2786.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2787.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2788.             else dcdiff = get_bits(gb, 8);

  2789.         }

  2790.         else

  2791.         {

  2792.             if (mquant == 1)

  2793.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2794.             else if (mquant == 2)

  2795.                 dcdiff = (dcdiff<<1) + get_bits1(gb)   - 1;

  2796.         }

  2797.         if (get_bits1(gb))

  2798.             dcdiff = -dcdiff;

  2799.     }

  2800. 

  2801.     /* Prediction */

  2802.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  2803.     *dc_val = dcdiff;

  2804. 

  2805.     /* Store the quantized DC coeff, used for prediction */

  2806. 

  2807.     if (n < 4) {

  2808.         block[0] = dcdiff * s->y_dc_scale;

  2809.     } else {

  2810.         block[0] = dcdiff * s->c_dc_scale;

  2811.     }

  2812.     /* Skip ? */

  2813.     run_diff = 0;

  2814. 

  2815.     //AC Decoding

  2816.     i = 1;

  2817. 

  2818.     /* check if AC is needed at all and adjust direction if needed */

  2819.     if(!a_avail) dc_pred_dir = 1;

  2820.     if(!c_avail) dc_pred_dir = 0;

  2821.     if(!a_avail && !c_avail) use_pred = 0;

  2822.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2823.     ac_val2 = ac_val;

  2824. 

  2825.     scale = mquant * 2 + v->halfpq;

  2826. 

  2827.     if(dc_pred_dir) //left

  2828.         ac_val -= 16;

  2829.     else //top

  2830.         ac_val -= 16 * s->block_wrap[n];

  2831. 

  2832.     q1 = s->current_picture.qscale_table[mb_pos];

  2833.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2834.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2835.     if(dc_pred_dir && n==1) q2 = q1;

  2836.     if(!dc_pred_dir && n==2) q2 = q1;

  2837.     if(n==3) q2 = q1;

  2838. 

  2839.     if(coded) {

  2840.         int last = 0, skip, value;

  2841.         const int8_t *zz_table;

  2842.         int k;

  2843. 

  2844.         zz_table = wmv1_scantable[0];

  2845. 

  2846.         while (!last) {

  2847.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2848.             i += skip;

  2849.             if(i > 63)

  2850.                 break;

  2851.             block[zz_table[i++]] = value;

  2852.         }

  2853. 

  2854.         /* apply AC prediction if needed */

  2855.         if(use_pred) {

  2856.             /* scale predictors if needed*/

  2857.             if(q2 && q1!=q2) {

  2858.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2859.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2860. 

  2861.                 if(dc_pred_dir) { //left

  2862.                     for(k = 1; k < 8; k++)

  2863.                         block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2864.                 } else { //top

  2865.                     for(k = 1; k < 8; k++)

  2866.                         block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2867.                 }

  2868.             } else {

  2869.                 if(dc_pred_dir) { //left

  2870.                     for(k = 1; k < 8; k++)

  2871.                         block[k << 3] += ac_val[k];

  2872.                 } else { //top

  2873.                     for(k = 1; k < 8; k++)

  2874.                         block[k] += ac_val[k + 8];

  2875.                 }

  2876.             }

  2877.         }

  2878.         /* save AC coeffs for further prediction */

  2879.         for(k = 1; k < 8; k++) {

  2880.             ac_val2[k] = block[k << 3];

  2881.             ac_val2[k + 8] = block[k];

  2882.         }

  2883. 

  2884.         /* scale AC coeffs */

  2885.         for(k = 1; k < 64; k++)

  2886.             if(block[k]) {

  2887.                 block[k] *= scale;

  2888.                 if(!v->pquantizer)

  2889.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  2890.             }

  2891. 

  2892.         if(use_pred) i = 63;

  2893.     } else { // no AC coeffs

  2894.         int k;

  2895. 

  2896.         memset(ac_val2, 0, 16 * 2);

  2897.         if(dc_pred_dir) {//left

  2898.             if(use_pred) {

  2899.                 memcpy(ac_val2, ac_val, 8 * 2);

  2900.                 if(q2 && q1!=q2) {

  2901.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2902.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2903.                     for(k = 1; k < 8; k++)

  2904.                         ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2905.                 }

  2906.             }

  2907.         } else {//top

  2908.             if(use_pred) {

  2909.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2910.                 if(q2 && q1!=q2) {

  2911.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2912.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2913.                     for(k = 1; k < 8; k++)

  2914.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2915.                 }

  2916.             }

  2917.         }

  2918. 

  2919.         /* apply AC prediction if needed */

  2920.         if(use_pred) {

  2921.             if(dc_pred_dir) { //left

  2922.                 for(k = 1; k < 8; k++) {

  2923.                     block[k << 3] = ac_val2[k] * scale;

  2924.                     if(!v->pquantizer && block[k << 3])

  2925.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  2926.                 }

  2927.             } else { //top

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

  2929.                     block[k] = ac_val2[k + 8] * scale;

  2930.                     if(!v->pquantizer && block[k])

  2931.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  2932.                 }

  2933.             }

  2934.             i = 63;

  2935.         }

  2936.     }

  2937.     s->block_last_index[n] = i;

  2938. 

  2939.     return 0;

  2940. }

  2941. 

  2942. /** Decode P block

  2943.  */

  2944. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,

  2945.                               uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left)

  2946. {

  2947.     MpegEncContext *s = &v->s;

  2948.     GetBitContext *gb = &s->gb;

  2949.     int i, j;

  2950.     int subblkpat = 0;

  2951.     int scale, off, idx, last, skip, value;

  2952.     int ttblk = ttmb & 7;

  2953.     int pat = 0;

  2954. 

  2955.     if(ttmb == -1) {

  2956.         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)];

  2957.     }

  2958.     if(ttblk == TT_4X4) {

  2959.         subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  2960.     }

  2961.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  2962.         subblkpat = decode012(gb);

  2963.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  2964.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  2965.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  2966.     }

  2967.     scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

  2968. 

  2969.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  2970.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  2971.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  2972.         ttblk = TT_8X4;

  2973.     }

  2974.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  2975.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  2976.         ttblk = TT_4X8;

  2977.     }

  2978.     switch(ttblk) {

  2979.     case TT_8X8:

  2980.         pat = 0xF;

  2981.         i = 0;

  2982.         last = 0;

  2983.         while (!last) {

  2984.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  2985.             i += skip;

  2986.             if(i > 63)

  2987.                 break;

  2988.             idx = wmv1_scantable[0][i++];

  2989.             block[idx] = value * scale;

  2990.             if(!v->pquantizer)

  2991.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  2992.         }

  2993.         if(!skip_block){

  2994.             s->dsp.vc1_inv_trans_8x8(block);

  2995.             s->dsp.add_pixels_clamped(block, dst, linesize);

  2996.             if(apply_filter && cbp_top  & 0xC)

  2997.                 s->dsp.vc1_v_loop_filter8(dst, linesize, v->pq);

  2998.             if(apply_filter && cbp_left & 0xA)

  2999.                 s->dsp.vc1_h_loop_filter8(dst, linesize, v->pq);

  3000.         }

  3001.         break;

  3002.     case TT_4X4:

  3003.         pat = ~subblkpat & 0xF;

  3004.         for(j = 0; j < 4; j++) {

  3005.             last = subblkpat & (1 << (3 - j));

  3006.             i = 0;

  3007.             off = (j & 1) * 4 + (j & 2) * 16;

  3008.             while (!last) {

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

  3010.                 i += skip;

  3011.                 if(i > 15)

  3012.                     break;

  3013.                 idx = ff_vc1_simple_progressive_4x4_zz[i++];

  3014.                 block[idx + off] = value * scale;

  3015.                 if(!v->pquantizer)

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

  3017.             }

  3018.             if(!(subblkpat & (1 << (3 - j))) && !skip_block){

  3019.                 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);

  3020.                 if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2)))))

  3021.                     s->dsp.vc1_v_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  3022.                 if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1)))))

  3023.                     s->dsp.vc1_h_loop_filter4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, v->pq);

  3024.             }

  3025.         }

  3026.         break;

  3027.     case TT_8X4:

  3028.         pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF;

  3029.         for(j = 0; j < 2; j++) {

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

  3031.             i = 0;

  3032.             off = j * 32;

  3033.             while (!last) {

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

  3035.                 i += skip;

  3036.                 if(i > 31)

  3037.                     break;

  3038.                 idx = v->zz_8x4[i++]+off;

  3039.                 block[idx] = value * scale;

  3040.                 if(!v->pquantizer)

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

  3042.             }

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

  3044.                 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);

  3045.                 if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC))

  3046.                     s->dsp.vc1_v_loop_filter8(dst + j*4*linesize, linesize, v->pq);

  3047.                 if(apply_filter && cbp_left & (2 << j))

  3048.                     s->dsp.vc1_h_loop_filter4(dst + j*4*linesize, linesize, v->pq);

  3049.             }

  3050.         }

  3051.         break;

  3052.     case TT_4X8:

  3053.         pat = ~(subblkpat*5) & 0xF;

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

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

  3056.             i = 0;

  3057.             off = j * 4;

  3058.             while (!last) {

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

  3060.                 i += skip;

  3061.                 if(i > 31)

  3062.                     break;

  3063.                 idx = v->zz_4x8[i++]+off;

  3064.                 block[idx] = value * scale;

  3065.                 if(!v->pquantizer)

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

  3067.             }

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

  3069.                 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);

  3070.                 if(apply_filter && cbp_top & (2 << j))

  3071.                     s->dsp.vc1_v_loop_filter4(dst + j*4, linesize, v->pq);

  3072.                 if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA))

  3073.                     s->dsp.vc1_h_loop_filter8(dst + j*4, linesize, v->pq);

  3074.             }

  3075.         }

  3076.         break;

  3077.     }

  3078.     return pat;

  3079. }

  3080. 

  3081. /** @} */ // Macroblock group

  3082. 

  3083. static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };

  3084. static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3085. 

  3086. /** Decode one P-frame MB (in Simple/Main profile)

  3087.  */

  3088. static int vc1_decode_p_mb(VC1Context *v)

  3089. {

  3090.     MpegEncContext *s = &v->s;

  3091.     GetBitContext *gb = &s->gb;

  3092.     int i, j;

  3093.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3094.     int cbp; /* cbp decoding stuff */

  3095.     int mqdiff, mquant; /* MB quantization */

  3096.     int ttmb = v->ttfrm; /* MB Transform type */

  3097. 

  3098.     int mb_has_coeffs = 1; /* last_flag */

  3099.     int dmv_x, dmv_y; /* Differential MV components */

  3100.     int index, index1; /* LUT indexes */

  3101.     int val, sign; /* temp values */

  3102.     int first_block = 1;

  3103.     int dst_idx, off;

  3104.     int skipped, fourmv;

  3105.     int block_cbp = 0, pat;

  3106.     int apply_loop_filter;

  3107. 

  3108.     mquant = v->pq; /* Loosy initialization */

  3109. 

  3110.     if (v->mv_type_is_raw)

  3111.         fourmv = get_bits1(gb);

  3112.     else

  3113.         fourmv = v->mv_type_mb_plane[mb_pos];

  3114.     if (v->skip_is_raw)

  3115.         skipped = get_bits1(gb);

  3116.     else

  3117.         skipped = v->s.mbskip_table[mb_pos];

  3118. 

  3119.     s->dsp.clear_blocks(s->block[0]);

  3120. 

  3121.     apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY);

  3122.     if (!fourmv) /* 1MV mode */

  3123.     {

  3124.         if (!skipped)

  3125.         {

  3126.             GET_MVDATA(dmv_x, dmv_y);

  3127. 

  3128.             if (s->mb_intra) {

  3129.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3130.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3131.             }

  3132.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3133.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3134. 

  3135.             /* FIXME Set DC val for inter block ? */

  3136.             if (s->mb_intra && !mb_has_coeffs)

  3137.             {

  3138.                 GET_MQUANT();

  3139.                 s->ac_pred = get_bits1(gb);

  3140.                 cbp = 0;

  3141.             }

  3142.             else if (mb_has_coeffs)

  3143.             {

  3144.                 if (s->mb_intra) s->ac_pred = get_bits1(gb);

  3145.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3146.                 GET_MQUANT();

  3147.             }

  3148.             else

  3149.             {

  3150.                 mquant = v->pq;

  3151.                 cbp = 0;

  3152.             }

  3153.             s->current_picture.qscale_table[mb_pos] = mquant;

  3154. 

  3155.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3156.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,

  3157.                                 VC1_TTMB_VLC_BITS, 2);

  3158.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3159.             dst_idx = 0;

  3160.             for (i=0; i<6; i++)

  3161.             {

  3162.                 s->dc_val[0][s->block_index[i]] = 0;

  3163.                 dst_idx += i >> 2;

  3164.                 val = ((cbp >> (5 - i)) & 1);

  3165.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3166.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3167.                 if(s->mb_intra) {

  3168.                     /* check if prediction blocks A and C are available */

  3169.                     v->a_avail = v->c_avail = 0;

  3170.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3171.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3172.                     if(i == 1 || i == 3 || s->mb_x)

  3173.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3174. 

  3175.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3176.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3177.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3178.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3179.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3180.                     if(v->pq >= 9 && v->overlap) {

  3181.                         if(v->c_avail)

  3182.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3183.                         if(v->a_avail)

  3184.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3185.                     }

  3186.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3187.                         int left_cbp, top_cbp;

  3188.                         if(i & 4){

  3189.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3190.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3191.                         }else{

  3192.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3193.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3194.                         }

  3195.                         if(left_cbp & 0xC)

  3196.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3197.                         if(top_cbp  & 0xA)

  3198.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3199.                     }

  3200.                     block_cbp |= 0xF << (i << 2);

  3201.                 } else if(val) {

  3202.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3203.                     if(apply_loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3204.                         filter = 1;

  3205.                         if(i & 4){

  3206.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3207.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3208.                         }else{

  3209.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3210.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3211.                         }

  3212.                         if(left_cbp & 0xC)

  3213.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3214.                         if(top_cbp  & 0xA)

  3215.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3216.                     }

  3217.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp);

  3218.                     block_cbp |= pat << (i << 2);

  3219.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3220.                     first_block = 0;

  3221.                 }

  3222.             }

  3223.         }

  3224.         else //Skipped

  3225.         {

  3226.             s->mb_intra = 0;

  3227.             for(i = 0; i < 6; i++) {

  3228.                 v->mb_type[0][s->block_index[i]] = 0;

  3229.                 s->dc_val[0][s->block_index[i]] = 0;

  3230.             }

  3231.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3232.             s->current_picture.qscale_table[mb_pos] = 0;

  3233.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3234.             vc1_mc_1mv(v, 0);

  3235.             return 0;

  3236.         }

  3237.     } //1MV mode

  3238.     else //4MV mode

  3239.     {

  3240.         if (!skipped /* unskipped MB */)

  3241.         {

  3242.             int intra_count = 0, coded_inter = 0;

  3243.             int is_intra[6], is_coded[6];

  3244.             /* Get CBPCY */

  3245.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3246.             for (i=0; i<6; i++)

  3247.             {

  3248.                 val = ((cbp >> (5 - i)) & 1);

  3249.                 s->dc_val[0][s->block_index[i]] = 0;

  3250.                 s->mb_intra = 0;

  3251.                 if(i < 4) {

  3252.                     dmv_x = dmv_y = 0;

  3253.                     s->mb_intra = 0;

  3254.                     mb_has_coeffs = 0;

  3255.                     if(val) {

  3256.                         GET_MVDATA(dmv_x, dmv_y);

  3257.                     }

  3258.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3259.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3260.                     intra_count += s->mb_intra;

  3261.                     is_intra[i] = s->mb_intra;

  3262.                     is_coded[i] = mb_has_coeffs;

  3263.                 }

  3264.                 if(i&4){

  3265.                     is_intra[i] = (intra_count >= 3);

  3266.                     is_coded[i] = val;

  3267.                 }

  3268.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3269.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3270.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3271.             }

  3272.             // if there are no coded blocks then don't do anything more

  3273.             if(!intra_count && !coded_inter) return 0;

  3274.             dst_idx = 0;

  3275.             GET_MQUANT();

  3276.             s->current_picture.qscale_table[mb_pos] = mquant;

  3277.             /* test if block is intra and has pred */

  3278.             {

  3279.                 int intrapred = 0;

  3280.                 for(i=0; i<6; i++)

  3281.                     if(is_intra[i]) {

  3282.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3283.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3284.                             intrapred = 1;

  3285.                             break;

  3286.                         }

  3287.                     }

  3288.                 if(intrapred)s->ac_pred = get_bits1(gb);

  3289.                 else s->ac_pred = 0;

  3290.             }

  3291.             if (!v->ttmbf && coded_inter)

  3292.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3293.             for (i=0; i<6; i++)

  3294.             {

  3295.                 dst_idx += i >> 2;

  3296.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3297.                 s->mb_intra = is_intra[i];

  3298.                 if (is_intra[i]) {

  3299.                     /* check if prediction blocks A and C are available */

  3300.                     v->a_avail = v->c_avail = 0;

  3301.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3302.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3303.                     if(i == 1 || i == 3 || s->mb_x)

  3304.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3305. 

  3306.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3307.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3308.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3309.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3310.                     s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3311.                     if(v->pq >= 9 && v->overlap) {

  3312.                         if(v->c_avail)

  3313.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3314.                         if(v->a_avail)

  3315.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3316.                     }

  3317.                     if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3318.                         int left_cbp, top_cbp;

  3319.                         if(i & 4){

  3320.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3321.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3322.                         }else{

  3323.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3324.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3325.                         }

  3326.                         if(left_cbp & 0xC)

  3327.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3328.                         if(top_cbp  & 0xA)

  3329.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3330.                     }

  3331.                     block_cbp |= 0xF << (i << 2);

  3332.                 } else if(is_coded[i]) {

  3333.                     int left_cbp = 0, top_cbp = 0, filter = 0;

  3334.                     if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){

  3335.                         filter = 1;

  3336.                         if(i & 4){

  3337.                             left_cbp = v->cbp[s->mb_x - 1]            >> (i * 4);

  3338.                             top_cbp  = v->cbp[s->mb_x - s->mb_stride] >> (i * 4);

  3339.                         }else{

  3340.                             left_cbp = (i & 1) ? (cbp >> ((i-1)*4)) : (v->cbp[s->mb_x - 1]           >> ((i+1)*4));

  3341.                             top_cbp  = (i & 2) ? (cbp >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4));

  3342.                         }

  3343.                         if(left_cbp & 0xC)

  3344.                             s->dsp.vc1_v_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3345.                         if(top_cbp  & 0xA)

  3346.                             s->dsp.vc1_h_loop_filter8(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, v->pq);

  3347.                     }

  3348.                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp);

  3349.                     block_cbp |= pat << (i << 2);

  3350.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3351.                     first_block = 0;

  3352.                 }

  3353.             }

  3354.             return 0;

  3355.         }

  3356.         else //Skipped MB

  3357.         {

  3358.             s->mb_intra = 0;

  3359.             s->current_picture.qscale_table[mb_pos] = 0;

  3360.             for (i=0; i<6; i++) {

  3361.                 v->mb_type[0][s->block_index[i]] = 0;

  3362.                 s->dc_val[0][s->block_index[i]] = 0;

  3363.             }

  3364.             for (i=0; i<4; i++)

  3365.             {

  3366.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3367.                 vc1_mc_4mv_luma(v, i);

  3368.             }

  3369.             vc1_mc_4mv_chroma(v);

  3370.             s->current_picture.qscale_table[mb_pos] = 0;

  3371.             return 0;

  3372.         }

  3373.     }

  3374.     v->cbp[s->mb_x] = block_cbp;

  3375. 

  3376.     /* Should never happen */

  3377.     return -1;

  3378. }

  3379. 

  3380. /** Decode one B-frame MB (in Main profile)

  3381.  */

  3382. static void vc1_decode_b_mb(VC1Context *v)

  3383. {

  3384.     MpegEncContext *s = &v->s;

  3385.     GetBitContext *gb = &s->gb;

  3386.     int i, j;

  3387.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3388.     int cbp = 0; /* cbp decoding stuff */

  3389.     int mqdiff, mquant; /* MB quantization */

  3390.     int ttmb = v->ttfrm; /* MB Transform type */

  3391.     int mb_has_coeffs = 0; /* last_flag */

  3392.     int index, index1; /* LUT indexes */

  3393.     int val, sign; /* temp values */

  3394.     int first_block = 1;

  3395.     int dst_idx, off;

  3396.     int skipped, direct;

  3397.     int dmv_x[2], dmv_y[2];

  3398.     int bmvtype = BMV_TYPE_BACKWARD;

  3399. 

  3400.     mquant = v->pq; /* Loosy initialization */

  3401.     s->mb_intra = 0;

  3402. 

  3403.     if (v->dmb_is_raw)

  3404.         direct = get_bits1(gb);

  3405.     else

  3406.         direct = v->direct_mb_plane[mb_pos];

  3407.     if (v->skip_is_raw)

  3408.         skipped = get_bits1(gb);

  3409.     else

  3410.         skipped = v->s.mbskip_table[mb_pos];

  3411. 

  3412.     s->dsp.clear_blocks(s->block[0]);

  3413.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3414.     for(i = 0; i < 6; i++) {

  3415.         v->mb_type[0][s->block_index[i]] = 0;

  3416.         s->dc_val[0][s->block_index[i]] = 0;

  3417.     }

  3418.     s->current_picture.qscale_table[mb_pos] = 0;

  3419. 

  3420.     if (!direct) {

  3421.         if (!skipped) {

  3422.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3423.             dmv_x[1] = dmv_x[0];

  3424.             dmv_y[1] = dmv_y[0];

  3425.         }

  3426.         if(skipped || !s->mb_intra) {

  3427.             bmvtype = decode012(gb);

  3428.             switch(bmvtype) {

  3429.             case 0:

  3430.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3431.                 break;

  3432.             case 1:

  3433.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3434.                 break;

  3435.             case 2:

  3436.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3437.                 dmv_x[0] = dmv_y[0] = 0;

  3438.             }

  3439.         }

  3440.     }

  3441.     for(i = 0; i < 6; i++)

  3442.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3443. 

  3444.     if (skipped) {

  3445.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3446.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3447.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3448.         return;

  3449.     }

  3450.     if (direct) {

  3451.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3452.         GET_MQUANT();

  3453.         s->mb_intra = 0;

  3454.         s->current_picture.qscale_table[mb_pos] = mquant;

  3455.         if(!v->ttmbf)

  3456.             ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3457.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3458.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3459.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3460.     } else {

  3461.         if(!mb_has_coeffs && !s->mb_intra) {

  3462.             /* no coded blocks - effectively skipped */

  3463.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3464.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3465.             return;

  3466.         }

  3467.         if(s->mb_intra && !mb_has_coeffs) {

  3468.             GET_MQUANT();

  3469.             s->current_picture.qscale_table[mb_pos] = mquant;

  3470.             s->ac_pred = get_bits1(gb);

  3471.             cbp = 0;

  3472.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3473.         } else {

  3474.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3475.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3476.                 if(!mb_has_coeffs) {

  3477.                     /* interpolated skipped block */

  3478.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3479.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3480.                     return;

  3481.                 }

  3482.             }

  3483.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3484.             if(!s->mb_intra) {

  3485.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3486.             }

  3487.             if(s->mb_intra)

  3488.                 s->ac_pred = get_bits1(gb);

  3489.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3490.             GET_MQUANT();

  3491.             s->current_picture.qscale_table[mb_pos] = mquant;

  3492.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3493.                 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3494.         }

  3495.     }

  3496.     dst_idx = 0;

  3497.     for (i=0; i<6; i++)

  3498.     {

  3499.         s->dc_val[0][s->block_index[i]] = 0;

  3500.         dst_idx += i >> 2;

  3501.         val = ((cbp >> (5 - i)) & 1);

  3502.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3503.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3504.         if(s->mb_intra) {

  3505.             /* check if prediction blocks A and C are available */

  3506.             v->a_avail = v->c_avail = 0;

  3507.             if(i == 2 || i == 3 || !s->first_slice_line)

  3508.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3509.             if(i == 1 || i == 3 || s->mb_x)

  3510.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3511. 

  3512.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3513.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3514.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3515.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3516.             s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3517.         } else if(val) {

  3518.             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), 0, 0, 0);

  3519.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3520.             first_block = 0;

  3521.         }

  3522.     }

  3523. }

  3524. 

  3525. /** Decode blocks of I-frame

  3526.  */

  3527. static void vc1_decode_i_blocks(VC1Context *v)

  3528. {

  3529.     int k, j;

  3530.     MpegEncContext *s = &v->s;

  3531.     int cbp, val;

  3532.     uint8_t *coded_val;

  3533.     int mb_pos;

  3534. 

  3535.     /* select codingmode used for VLC tables selection */

  3536.     switch(v->y_ac_table_index){

  3537.     case 0:

  3538.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3539.         break;

  3540.     case 1:

  3541.         v->codingset = CS_HIGH_MOT_INTRA;

  3542.         break;

  3543.     case 2:

  3544.         v->codingset = CS_MID_RATE_INTRA;

  3545.         break;

  3546.     }

  3547. 

  3548.     switch(v->c_ac_table_index){

  3549.     case 0:

  3550.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3551.         break;

  3552.     case 1:

  3553.         v->codingset2 = CS_HIGH_MOT_INTER;

  3554.         break;

  3555.     case 2:

  3556.         v->codingset2 = CS_MID_RATE_INTER;

  3557.         break;

  3558.     }

  3559. 

  3560.     /* Set DC scale - y and c use the same */

  3561.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3562.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3563. 

  3564.     //do frame decode

  3565.     s->mb_x = s->mb_y = 0;

  3566.     s->mb_intra = 1;

  3567.     s->first_slice_line = 1;

  3568.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3569.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3570.             ff_init_block_index(s);

  3571.             ff_update_block_index(s);

  3572.             s->dsp.clear_blocks(s->block[0]);

  3573.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3574.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3575.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3576.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3577.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3578. 

  3579.             // do actual MB decoding and displaying

  3580.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3581.             v->s.ac_pred = get_bits1(&v->s.gb);

  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.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3594. 

  3595.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3596.                 if(v->pq >= 9 && v->overlap) {

  3597.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3598.                 }

  3599.             }

  3600. 

  3601.             vc1_put_block(v, s->block);

  3602.             if(v->pq >= 9 && v->overlap) {

  3603.                 if(s->mb_x) {

  3604.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3605.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3606.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3607.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3608.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3609.                     }

  3610.                 }

  3611.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3612.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3613.                 if(!s->first_slice_line) {

  3614.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3615.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3616.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3617.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3618.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3619.                     }

  3620.                 }

  3621.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3622.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3623.             }

  3624.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3625. 

  3626.             if(get_bits_count(&s->gb) > v->bits) {

  3627.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3628.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3629.                 return;

  3630.             }

  3631.         }

  3632.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3633.         s->first_slice_line = 0;

  3634.     }

  3635.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3636. }

  3637. 

  3638. /** Decode blocks of I-frame for advanced profile

  3639.  */

  3640. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3641. {

  3642.     int k, j;

  3643.     MpegEncContext *s = &v->s;

  3644.     int cbp, val;

  3645.     uint8_t *coded_val;

  3646.     int mb_pos;

  3647.     int mquant = v->pq;

  3648.     int mqdiff;

  3649.     int overlap;

  3650.     GetBitContext *gb = &s->gb;

  3651. 

  3652.     /* select codingmode used for VLC tables selection */

  3653.     switch(v->y_ac_table_index){

  3654.     case 0:

  3655.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3656.         break;

  3657.     case 1:

  3658.         v->codingset = CS_HIGH_MOT_INTRA;

  3659.         break;

  3660.     case 2:

  3661.         v->codingset = CS_MID_RATE_INTRA;

  3662.         break;

  3663.     }

  3664. 

  3665.     switch(v->c_ac_table_index){

  3666.     case 0:

  3667.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3668.         break;

  3669.     case 1:

  3670.         v->codingset2 = CS_HIGH_MOT_INTER;

  3671.         break;

  3672.     case 2:

  3673.         v->codingset2 = CS_MID_RATE_INTER;

  3674.         break;

  3675.     }

  3676. 

  3677.     //do frame decode

  3678.     s->mb_x = s->mb_y = 0;

  3679.     s->mb_intra = 1;

  3680.     s->first_slice_line = 1;

  3681.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3682.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3683.             ff_init_block_index(s);

  3684.             ff_update_block_index(s);

  3685.             s->dsp.clear_blocks(s->block[0]);

  3686.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3687.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3688.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3689.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3690. 

  3691.             // do actual MB decoding and displaying

  3692.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3693.             if(v->acpred_is_raw)

  3694.                 v->s.ac_pred = get_bits1(&v->s.gb);

  3695.             else

  3696.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3697. 

  3698.             if(v->condover == CONDOVER_SELECT) {

  3699.                 if(v->overflg_is_raw)

  3700.                     overlap = get_bits1(&v->s.gb);

  3701.                 else

  3702.                     overlap = v->over_flags_plane[mb_pos];

  3703.             } else

  3704.                 overlap = (v->condover == CONDOVER_ALL);

  3705. 

  3706.             GET_MQUANT();

  3707. 

  3708.             s->current_picture.qscale_table[mb_pos] = mquant;

  3709.             /* Set DC scale - y and c use the same */

  3710.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3711.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3712. 

  3713.             for(k = 0; k < 6; k++) {

  3714.                 val = ((cbp >> (5 - k)) & 1);

  3715. 

  3716.                 if (k < 4) {

  3717.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3718.                     val = val ^ pred;

  3719.                     *coded_val = val;

  3720.                 }

  3721.                 cbp |= val << (5 - k);

  3722. 

  3723.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3724.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3725. 

  3726.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3727. 

  3728.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3729.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3730.             }

  3731. 

  3732.             vc1_put_block(v, s->block);

  3733.             if(overlap) {

  3734.                 if(s->mb_x) {

  3735.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3736.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3737.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3738.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3739.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3740.                     }

  3741.                 }

  3742.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3743.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3744.                 if(!s->first_slice_line) {

  3745.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3746.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3747.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3748.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3749.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3750.                     }

  3751.                 }

  3752.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3753.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3754.             }

  3755.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3756. 

  3757.             if(get_bits_count(&s->gb) > v->bits) {

  3758.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3759.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3760.                 return;

  3761.             }

  3762.         }

  3763.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3764.         s->first_slice_line = 0;

  3765.     }

  3766.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3767. }

  3768. 

  3769. static void vc1_decode_p_blocks(VC1Context *v)

  3770. {

  3771.     MpegEncContext *s = &v->s;

  3772. 

  3773.     /* select codingmode used for VLC tables selection */

  3774.     switch(v->c_ac_table_index){

  3775.     case 0:

  3776.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3777.         break;

  3778.     case 1:

  3779.         v->codingset = CS_HIGH_MOT_INTRA;

  3780.         break;

  3781.     case 2:

  3782.         v->codingset = CS_MID_RATE_INTRA;

  3783.         break;

  3784.     }

  3785. 

  3786.     switch(v->c_ac_table_index){

  3787.     case 0:

  3788.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3789.         break;

  3790.     case 1:

  3791.         v->codingset2 = CS_HIGH_MOT_INTER;

  3792.         break;

  3793.     case 2:

  3794.         v->codingset2 = CS_MID_RATE_INTER;

  3795.         break;

  3796.     }

  3797. 

  3798.     s->first_slice_line = 1;

  3799.     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);

  3800.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3801.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3802.             ff_init_block_index(s);

  3803.             ff_update_block_index(s);

  3804.             s->dsp.clear_blocks(s->block[0]);

  3805. 

  3806.             vc1_decode_p_mb(v);

  3807.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3808.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3809.                 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);

  3810.                 return;

  3811.             }

  3812.         }

  3813.         memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride);

  3814.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3815.         s->first_slice_line = 0;

  3816.     }

  3817.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3818. }

  3819. 

  3820. static void vc1_decode_b_blocks(VC1Context *v)

  3821. {

  3822.     MpegEncContext *s = &v->s;

  3823. 

  3824.     /* select codingmode used for VLC tables selection */

  3825.     switch(v->c_ac_table_index){

  3826.     case 0:

  3827.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3828.         break;

  3829.     case 1:

  3830.         v->codingset = CS_HIGH_MOT_INTRA;

  3831.         break;

  3832.     case 2:

  3833.         v->codingset = CS_MID_RATE_INTRA;

  3834.         break;

  3835.     }

  3836. 

  3837.     switch(v->c_ac_table_index){

  3838.     case 0:

  3839.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3840.         break;

  3841.     case 1:

  3842.         v->codingset2 = CS_HIGH_MOT_INTER;

  3843.         break;

  3844.     case 2:

  3845.         v->codingset2 = CS_MID_RATE_INTER;

  3846.         break;

  3847.     }

  3848. 

  3849.     s->first_slice_line = 1;

  3850.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3851.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3852.             ff_init_block_index(s);

  3853.             ff_update_block_index(s);

  3854.             s->dsp.clear_blocks(s->block[0]);

  3855. 

  3856.             vc1_decode_b_mb(v);

  3857.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  3858.                 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));

  3859.                 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);

  3860.                 return;

  3861.             }

  3862.             if(v->s.loop_filter) vc1_loop_filter_iblk(s, v->pq);

  3863.         }

  3864.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3865.         s->first_slice_line = 0;

  3866.     }

  3867.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3868. }

  3869. 

  3870. static void vc1_decode_skip_blocks(VC1Context *v)

  3871. {

  3872.     MpegEncContext *s = &v->s;

  3873. 

  3874.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3875.     s->first_slice_line = 1;

  3876.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3877.         s->mb_x = 0;

  3878.         ff_init_block_index(s);

  3879.         ff_update_block_index(s);

  3880.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  3881.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3882.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  3883.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3884.         s->first_slice_line = 0;

  3885.     }

  3886.     s->pict_type = FF_P_TYPE;

  3887. }

  3888. 

  3889. static void vc1_decode_blocks(VC1Context *v)

  3890. {

  3891. 

  3892.     v->s.esc3_level_length = 0;

  3893.     if(v->x8_type){

  3894.         ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );

  3895.     }else{

  3896. 

  3897.         switch(v->s.pict_type) {

  3898.         case FF_I_TYPE:

  3899.             if(v->profile == PROFILE_ADVANCED)

  3900.                 vc1_decode_i_blocks_adv(v);

  3901.             else

  3902.                 vc1_decode_i_blocks(v);

  3903.             break;

  3904.         case FF_P_TYPE:

  3905.             if(v->p_frame_skipped)

  3906.                 vc1_decode_skip_blocks(v);

  3907.             else

  3908.                 vc1_decode_p_blocks(v);

  3909.             break;

  3910.         case FF_B_TYPE:

  3911.             if(v->bi_type){

  3912.                 if(v->profile == PROFILE_ADVANCED)

  3913.                     vc1_decode_i_blocks_adv(v);

  3914.                 else

  3915.                     vc1_decode_i_blocks(v);

  3916.             }else

  3917.                 vc1_decode_b_blocks(v);

  3918.             break;

  3919.         }

  3920.     }

  3921. }

  3922. 

  3923. /** Find VC-1 marker in buffer

  3924.  * @return position where next marker starts or end of buffer if no marker found

  3925.  */

  3926. static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)

  3927. {

  3928.     uint32_t mrk = 0xFFFFFFFF;

  3929. 

  3930.     if(end-src < 4) return end;

  3931.     while(src < end){

  3932.         mrk = (mrk << 8) | *src++;

  3933.         if(IS_MARKER(mrk))

  3934.             return src-4;

  3935.     }

  3936.     return end;

  3937. }

  3938. 

  3939. static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)

  3940. {

  3941.     int dsize = 0, i;

  3942. 

  3943.     if(size < 4){

  3944.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  3945.         return size;

  3946.     }

  3947.     for(i = 0; i < size; i++, src++) {

  3948.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  3949.             dst[dsize++] = src[1];

  3950.             src++;

  3951.             i++;

  3952.         } else

  3953.             dst[dsize++] = *src;

  3954.     }

  3955.     return dsize;

  3956. }

  3957. 

  3958. /** Initialize a VC1/WMV3 decoder

  3959.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  3960.  * @todo TODO: Decypher remaining bits in extra_data

  3961.  */

  3962. static av_cold int vc1_decode_init(AVCodecContext *avctx)

  3963. {

  3964.     VC1Context *v = avctx->priv_data;

  3965.     MpegEncContext *s = &v->s;

  3966.     GetBitContext gb;

  3967. 

  3968.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  3969.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  3970.         avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);

  3971.     else

  3972.         avctx->pix_fmt = PIX_FMT_GRAY8;

  3973.     avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);

  3974.     v->s.avctx = avctx;

  3975.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  3976.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  3977. 

  3978.     if(avctx->idct_algo==FF_IDCT_AUTO){

  3979.         avctx->idct_algo=FF_IDCT_WMV2;

  3980.     }

  3981. 

  3982.     if(ff_h263_decode_init(avctx) < 0)

  3983.         return -1;

  3984.     if (vc1_init_common(v) < 0) return -1;

  3985. 

  3986.     avctx->coded_width = avctx->width;

  3987.     avctx->coded_height = avctx->height;

  3988.     if (avctx->codec_id == CODEC_ID_WMV3)

  3989.     {

  3990.         int count = 0;

  3991. 

  3992.         // looks like WMV3 has a sequence header stored in the extradata

  3993.         // advanced sequence header may be before the first frame

  3994.         // the last byte of the extradata is a version number, 1 for the

  3995.         // samples we can decode

  3996. 

  3997.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  3998. 

  3999.         if (decode_sequence_header(avctx, &gb) < 0)

  4000.           return -1;

  4001. 

  4002.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  4003.         if (count>0)

  4004.         {

  4005.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  4006.                    count, get_bits(&gb, count));

  4007.         }

  4008.         else if (count < 0)

  4009.         {

  4010.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  4011.         }

  4012.     } else { // VC1/WVC1

  4013.         const uint8_t *start = avctx->extradata;

  4014.         uint8_t *end = avctx->extradata + avctx->extradata_size;

  4015.         const uint8_t *next;

  4016.         int size, buf2_size;

  4017.         uint8_t *buf2 = NULL;

  4018.         int seq_initialized = 0, ep_initialized = 0;

  4019. 

  4020.         if(avctx->extradata_size < 16) {

  4021.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  4022.             return -1;

  4023.         }

  4024. 

  4025.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4026.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  4027.         next = start;

  4028.         for(; next < end; start = next){

  4029.             next = find_next_marker(start + 4, end);

  4030.             size = next - start - 4;

  4031.             if(size <= 0) continue;

  4032.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  4033.             init_get_bits(&gb, buf2, buf2_size * 8);

  4034.             switch(AV_RB32(start)){

  4035.             case VC1_CODE_SEQHDR:

  4036.                 if(decode_sequence_header(avctx, &gb) < 0){

  4037.                     av_free(buf2);

  4038.                     return -1;

  4039.                 }

  4040.                 seq_initialized = 1;

  4041.                 break;

  4042.             case VC1_CODE_ENTRYPOINT:

  4043.                 if(decode_entry_point(avctx, &gb) < 0){

  4044.                     av_free(buf2);

  4045.                     return -1;

  4046.                 }

  4047.                 ep_initialized = 1;

  4048.                 break;

  4049.             }

  4050.         }

  4051.         av_free(buf2);

  4052.         if(!seq_initialized || !ep_initialized){

  4053.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4054.             return -1;

  4055.         }

  4056.     }

  4057.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4058.     s->low_delay = !avctx->has_b_frames;

  4059. 

  4060.     s->mb_width = (avctx->coded_width+15)>>4;

  4061.     s->mb_height = (avctx->coded_height+15)>>4;

  4062. 

  4063.     /* Allocate mb bitplanes */

  4064.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4065.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4066.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4067.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4068. 

  4069.     v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);

  4070.     v->cbp = v->cbp_base + s->mb_stride;

  4071. 

  4072.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4073.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4074.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4075.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4076.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4077. 

  4078.     /* Init coded blocks info */

  4079.     if (v->profile == PROFILE_ADVANCED)

  4080.     {

  4081. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4082. //            return -1;

  4083. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4084. //            return -1;

  4085.     }

  4086. 

  4087.     ff_intrax8_common_init(&v->x8,s);

  4088.     return 0;

  4089. }

  4090. 

  4091. 

  4092. /** Decode a VC1/WMV3 frame

  4093.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4094.  */

  4095. static int vc1_decode_frame(AVCodecContext *avctx,

  4096.                             void *data, int *data_size,

  4097.                             AVPacket *avpkt)

  4098. {

  4099.     const uint8_t *buf = avpkt->data;

  4100.     int buf_size = avpkt->size;

  4101.     VC1Context *v = avctx->priv_data;

  4102.     MpegEncContext *s = &v->s;

  4103.     AVFrame *pict = data;

  4104.     uint8_t *buf2 = NULL;

  4105.     const uint8_t *buf_start = buf;

  4106. 

  4107.     /* no supplementary picture */

  4108.     if (buf_size == 0) {

  4109.         /* special case for last picture */

  4110.         if (s->low_delay==0 && s->next_picture_ptr) {

  4111.             *pict= *(AVFrame*)s->next_picture_ptr;

  4112.             s->next_picture_ptr= NULL;

  4113. 

  4114.             *data_size = sizeof(AVFrame);

  4115.         }

  4116. 

  4117.         return 0;

  4118.     }

  4119. 

  4120.     /* We need to set current_picture_ptr before reading the header,

  4121.      * otherwise we cannot store anything in there. */

  4122.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4123.         int i= ff_find_unused_picture(s, 0);

  4124.         s->current_picture_ptr= &s->picture[i];

  4125.     }

  4126. 

  4127.     if (s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){

  4128.         if (v->profile < PROFILE_ADVANCED)

  4129.             avctx->pix_fmt = PIX_FMT_VDPAU_WMV3;

  4130.         else

  4131.             avctx->pix_fmt = PIX_FMT_VDPAU_VC1;

  4132.     }

  4133. 

  4134.     //for advanced profile we may need to parse and unescape data

  4135.     if (avctx->codec_id == CODEC_ID_VC1) {

  4136.         int buf_size2 = 0;

  4137.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4138. 

  4139.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4140.             const uint8_t *start, *end, *next;

  4141.             int size;

  4142. 

  4143.             next = buf;

  4144.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4145.                 next = find_next_marker(start + 4, end);

  4146.                 size = next - start - 4;

  4147.                 if(size <= 0) continue;

  4148.                 switch(AV_RB32(start)){

  4149.                 case VC1_CODE_FRAME:

  4150.                     if (avctx->hwaccel ||

  4151.                         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4152.                         buf_start = start;

  4153.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4154.                     break;

  4155.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4156.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4157.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4158.                     decode_entry_point(avctx, &s->gb);

  4159.                     break;

  4160.                 case VC1_CODE_SLICE:

  4161.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4162.                     av_free(buf2);

  4163.                     return -1;

  4164.                 }

  4165.             }

  4166.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4167.             const uint8_t *divider;

  4168. 

  4169.             divider = find_next_marker(buf, buf + buf_size);

  4170.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4171.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4172.                 av_free(buf2);

  4173.                 return -1;

  4174.             }

  4175. 

  4176.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4177.             // TODO

  4178.             av_free(buf2);return -1;

  4179.         }else{

  4180.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4181.         }

  4182.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4183.     } else

  4184.         init_get_bits(&s->gb, buf, buf_size*8);

  4185.     // do parse frame header

  4186.     if(v->profile < PROFILE_ADVANCED) {

  4187.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4188.             av_free(buf2);

  4189.             return -1;

  4190.         }

  4191.     } else {

  4192.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4193.             av_free(buf2);

  4194.             return -1;

  4195.         }

  4196.     }

  4197. 

  4198.     if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){

  4199.         av_free(buf2);

  4200.         return -1;

  4201.     }

  4202. 

  4203.     // for hurry_up==5

  4204.     s->current_picture.pict_type= s->pict_type;

  4205.     s->current_picture.key_frame= s->pict_type == FF_I_TYPE;

  4206. 

  4207.     /* skip B-frames if we don't have reference frames */

  4208.     if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){

  4209.         av_free(buf2);

  4210.         return -1;//buf_size;

  4211.     }

  4212.     /* skip b frames if we are in a hurry */

  4213.     if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;

  4214.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)

  4215.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)

  4216.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4217.         av_free(buf2);

  4218.         return buf_size;

  4219.     }

  4220.     /* skip everything if we are in a hurry>=5 */

  4221.     if(avctx->hurry_up>=5) {

  4222.         av_free(buf2);

  4223.         return -1;//buf_size;

  4224.     }

  4225. 

  4226.     if(s->next_p_frame_damaged){

  4227.         if(s->pict_type==FF_B_TYPE)

  4228.             return buf_size;

  4229.         else

  4230.             s->next_p_frame_damaged=0;

  4231.     }

  4232. 

  4233.     if(MPV_frame_start(s, avctx) < 0) {

  4234.         av_free(buf2);

  4235.         return -1;

  4236.     }

  4237. 

  4238.     s->me.qpel_put= s->dsp.put_qpel_pixels_tab;

  4239.     s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;

  4240. 

  4241.     if ((CONFIG_VC1_VDPAU_DECODER || CONFIG_WMV3_VDPAU_DECODER)

  4242.         &&s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)

  4243.         ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);

  4244.     else if (avctx->hwaccel) {

  4245.         if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)

  4246.             return -1;

  4247.         if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)

  4248.             return -1;

  4249.         if (avctx->hwaccel->end_frame(avctx) < 0)

  4250.             return -1;

  4251.     } else {

  4252.         ff_er_frame_start(s);

  4253. 

  4254.         v->bits = buf_size * 8;

  4255.         vc1_decode_blocks(v);

  4256. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4257. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4258. //      return -1;

  4259.         ff_er_frame_end(s);

  4260.     }

  4261. 

  4262.     MPV_frame_end(s);

  4263. 

  4264. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4265. assert(s->current_picture.pict_type == s->pict_type);

  4266.     if (s->pict_type == FF_B_TYPE || s->low_delay) {

  4267.         *pict= *(AVFrame*)s->current_picture_ptr;

  4268.     } else if (s->last_picture_ptr != NULL) {

  4269.         *pict= *(AVFrame*)s->last_picture_ptr;

  4270.     }

  4271. 

  4272.     if(s->last_picture_ptr || s->low_delay){

  4273.         *data_size = sizeof(AVFrame);

  4274.         ff_print_debug_info(s, pict);

  4275.     }

  4276. 

  4277.     /* Return the Picture timestamp as the frame number */

  4278.     /* we subtract 1 because it is added on utils.c     */

  4279.     avctx->frame_number = s->picture_number - 1;

  4280. 

  4281.     av_free(buf2);

  4282.     return buf_size;

  4283. }

  4284. 

  4285. 

  4286. /** Close a VC1/WMV3 decoder

  4287.  * @warning Initial try at using MpegEncContext stuff

  4288.  */

  4289. static av_cold int vc1_decode_end(AVCodecContext *avctx)

  4290. {

  4291.     VC1Context *v = avctx->priv_data;

  4292. 

  4293.     av_freep(&v->hrd_rate);

  4294.     av_freep(&v->hrd_buffer);

  4295.     MPV_common_end(&v->s);

  4296.     av_freep(&v->mv_type_mb_plane);

  4297.     av_freep(&v->direct_mb_plane);

  4298.     av_freep(&v->acpred_plane);

  4299.     av_freep(&v->over_flags_plane);

  4300.     av_freep(&v->mb_type_base);

  4301.     av_freep(&v->cbp_base);

  4302.     ff_intrax8_common_end(&v->x8);

  4303.     return 0;

  4304. }

  4305. 

  4306. 

  4307. AVCodec vc1_decoder = {

  4308.     "vc1",

  4309.     CODEC_TYPE_VIDEO,

  4310.     CODEC_ID_VC1,

  4311.     sizeof(VC1Context),

  4312.     vc1_decode_init,

  4313.     NULL,

  4314.     vc1_decode_end,

  4315.     vc1_decode_frame,

  4316.     CODEC_CAP_DELAY,

  4317.     NULL,

  4318.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),

  4319.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4320. };

  4321. 

  4322. AVCodec wmv3_decoder = {

  4323.     "wmv3",

  4324.     CODEC_TYPE_VIDEO,

  4325.     CODEC_ID_WMV3,

  4326.     sizeof(VC1Context),

  4327.     vc1_decode_init,

  4328.     NULL,

  4329.     vc1_decode_end,

  4330.     vc1_decode_frame,

  4331.     CODEC_CAP_DELAY,

  4332.     NULL,

  4333.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),

  4334.     .pix_fmts = ff_hwaccel_pixfmt_list_420

  4335. };

  4336. 

  4337. #if CONFIG_WMV3_VDPAU_DECODER

  4338. AVCodec wmv3_vdpau_decoder = {

  4339.     "wmv3_vdpau",

  4340.     CODEC_TYPE_VIDEO,

  4341.     CODEC_ID_WMV3,

  4342.     sizeof(VC1Context),

  4343.     vc1_decode_init,

  4344.     NULL,

  4345.     vc1_decode_end,

  4346.     vc1_decode_frame,

  4347.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4348.     NULL,

  4349.     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),

  4350.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_WMV3, PIX_FMT_NONE}

  4351. };

  4352. #endif

  4353. 

  4354. #if CONFIG_VC1_VDPAU_DECODER

  4355. AVCodec vc1_vdpau_decoder = {

  4356.     "vc1_vdpau",

  4357.     CODEC_TYPE_VIDEO,

  4358.     CODEC_ID_VC1,

  4359.     sizeof(VC1Context),

  4360.     vc1_decode_init,

  4361.     NULL,

  4362.     vc1_decode_end,

  4363.     vc1_decode_frame,

  4364.     CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,

  4365.     NULL,

  4366.     .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),

  4367.     .pix_fmts = (enum PixelFormat[]){PIX_FMT_VDPAU_VC1, PIX_FMT_NONE}

  4368. };

  4369. #endif