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  1. /*
  2.  * VC-1 and WMV3 decoder
  3.  * Copyright (c) 2011 Mashiat Sarker Shakkhar
  4.  * Copyright (c) 2006-2007 Konstantin Shishkov
  5.  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
  6.  *
  7.  * This file is part of FFmpeg.
  8.  *
  9.  * FFmpeg is free software; you can redistribute it and/or
  10.  * modify it under the terms of the GNU Lesser General Public
  11.  * License as published by the Free Software Foundation; either
  12.  * version 2.1 of the License, or (at your option) any later version.
  13.  *
  14.  * FFmpeg is distributed in the hope that it will be useful,
  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17.  * Lesser General Public License for more details.
  18.  *
  19.  * You should have received a copy of the GNU Lesser General Public
  20.  * License along with FFmpeg; if not, write to the Free Software
  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22.  */
  23.  
  24. /**
  25.  * @file
  26.  * VC-1 and WMV3 block decoding routines
  27.  */
  28.  
  29. #include "avcodec.h"
  30. #include "h264chroma.h"
  31. #include "mathops.h"
  32. #include "mpegvideo.h"
  33. #include "vc1.h"
  34.  
  35. static av_always_inline void vc1_scale_luma(uint8_t *srcY,
  36.                                             int k, int linesize)
  37. {
  38.     int i, j;
  39.     for (j = 0; j < k; j++) {
  40.         for (i = 0; i < k; i++)
  41.             srcY[i] = ((srcY[i] - 128) >> 1) + 128;
  42.         srcY += linesize;
  43.     }
  44. }
  45.  
  46. static av_always_inline void vc1_scale_chroma(uint8_t *srcU, uint8_t *srcV,
  47.                                               int k, int uvlinesize)
  48. {
  49.     int i, j;
  50.     for (j = 0; j < k; j++) {
  51.         for (i = 0; i < k; i++) {
  52.             srcU[i] = ((srcU[i] - 128) >> 1) + 128;
  53.             srcV[i] = ((srcV[i] - 128) >> 1) + 128;
  54.         }
  55.         srcU += uvlinesize;
  56.         srcV += uvlinesize;
  57.     }
  58. }
  59.  
  60. static av_always_inline void vc1_lut_scale_luma(uint8_t *srcY,
  61.                                                 uint8_t *lut1, uint8_t *lut2,
  62.                                                 int k, int linesize)
  63. {
  64.     int i, j;
  65.  
  66.     for (j = 0; j < k; j += 2) {
  67.         for (i = 0; i < k; i++)
  68.             srcY[i] = lut1[srcY[i]];
  69.         srcY += linesize;
  70.  
  71.         if (j + 1 == k)
  72.             break;
  73.  
  74.         for (i = 0; i < k; i++)
  75.             srcY[i] = lut2[srcY[i]];
  76.         srcY += linesize;
  77.     }
  78. }
  79.  
  80. static av_always_inline void vc1_lut_scale_chroma(uint8_t *srcU, uint8_t *srcV,
  81.                                                   uint8_t *lut1, uint8_t *lut2,
  82.                                                   int k, int uvlinesize)
  83. {
  84.     int i, j;
  85.  
  86.     for (j = 0; j < k; j += 2) {
  87.         for (i = 0; i < k; i++) {
  88.             srcU[i] = lut1[srcU[i]];
  89.             srcV[i] = lut1[srcV[i]];
  90.         }
  91.         srcU += uvlinesize;
  92.         srcV += uvlinesize;
  93.  
  94.         if (j + 1 == k)
  95.             break;
  96.  
  97.         for (i = 0; i < k; i++) {
  98.             srcU[i] = lut2[srcU[i]];
  99.             srcV[i] = lut2[srcV[i]];
  100.         }
  101.         srcU += uvlinesize;
  102.         srcV += uvlinesize;
  103.     }
  104. }
  105.  
  106. static const uint8_t popcount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 };
  107.  
  108. static av_always_inline int get_luma_mv(VC1Context *v, int dir, int16_t *tx, int16_t *ty)
  109. {
  110.     MpegEncContext *s = &v->s;
  111.     int idx = v->mv_f[dir][s->block_index[0] + v->blocks_off] |
  112.              (v->mv_f[dir][s->block_index[1] + v->blocks_off] << 1) |
  113.              (v->mv_f[dir][s->block_index[2] + v->blocks_off] << 2) |
  114.              (v->mv_f[dir][s->block_index[3] + v->blocks_off] << 3);
  115.     static const uint8_t index2[16] = { 0, 0, 0, 0x23, 0, 0x13, 0x03, 0, 0, 0x12, 0x02, 0, 0x01, 0, 0, 0 };
  116.     int opp_count = popcount4[idx];
  117.  
  118.     switch (opp_count) {
  119.     case 0:
  120.     case 4:
  121.         *tx = median4(s->mv[dir][0][0], s->mv[dir][1][0], s->mv[dir][2][0], s->mv[dir][3][0]);
  122.         *ty = median4(s->mv[dir][0][1], s->mv[dir][1][1], s->mv[dir][2][1], s->mv[dir][3][1]);
  123.         break;
  124.     case 1:
  125.         *tx = mid_pred(s->mv[dir][idx < 2][0], s->mv[dir][1 + (idx < 4)][0], s->mv[dir][2 + (idx < 8)][0]);
  126.         *ty = mid_pred(s->mv[dir][idx < 2][1], s->mv[dir][1 + (idx < 4)][1], s->mv[dir][2 + (idx < 8)][1]);
  127.         break;
  128.     case 3:
  129.         *tx = mid_pred(s->mv[dir][idx > 0xd][0], s->mv[dir][1 + (idx > 0xb)][0], s->mv[dir][2 + (idx > 0x7)][0]);
  130.         *ty = mid_pred(s->mv[dir][idx > 0xd][1], s->mv[dir][1 + (idx > 0xb)][1], s->mv[dir][2 + (idx > 0x7)][1]);
  131.         break;
  132.     case 2:
  133.         *tx = (s->mv[dir][index2[idx] >> 4][0] + s->mv[dir][index2[idx] & 0xf][0]) / 2;
  134.         *ty = (s->mv[dir][index2[idx] >> 4][1] + s->mv[dir][index2[idx] & 0xf][1]) / 2;
  135.         break;
  136.     }
  137.     return opp_count;
  138. }
  139.  
  140. static av_always_inline int get_chroma_mv(VC1Context *v, int dir, int16_t *tx, int16_t *ty)
  141. {
  142.     MpegEncContext *s = &v->s;
  143.     int idx = !v->mb_type[0][s->block_index[0]] |
  144.              (!v->mb_type[0][s->block_index[1]] << 1) |
  145.              (!v->mb_type[0][s->block_index[2]] << 2) |
  146.              (!v->mb_type[0][s->block_index[3]] << 3);
  147.     static const uint8_t index2[16] = { 0, 0, 0, 0x01, 0, 0x02, 0x12, 0, 0, 0x03, 0x13, 0, 0x23, 0, 0, 0 };
  148.     int valid_count = popcount4[idx];
  149.  
  150.     switch (valid_count) {
  151.     case 4:
  152.         *tx = median4(s->mv[dir][0][0], s->mv[dir][1][0], s->mv[dir][2][0], s->mv[dir][3][0]);
  153.         *ty = median4(s->mv[dir][0][1], s->mv[dir][1][1], s->mv[dir][2][1], s->mv[dir][3][1]);
  154.         break;
  155.     case 3:
  156.         *tx = mid_pred(s->mv[dir][idx > 0xd][0], s->mv[dir][1 + (idx > 0xb)][0], s->mv[dir][2 + (idx > 0x7)][0]);
  157.         *ty = mid_pred(s->mv[dir][idx > 0xd][1], s->mv[dir][1 + (idx > 0xb)][1], s->mv[dir][2 + (idx > 0x7)][1]);
  158.         break;
  159.     case 2:
  160.         *tx = (s->mv[dir][index2[idx] >> 4][0] + s->mv[dir][index2[idx] & 0xf][0]) / 2;
  161.         *ty = (s->mv[dir][index2[idx] >> 4][1] + s->mv[dir][index2[idx] & 0xf][1]) / 2;
  162.         break;
  163.     default:
  164.         return 0;
  165.     }
  166.     return valid_count;
  167. }
  168.  
  169. /** Do motion compensation over 1 macroblock
  170.  * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
  171.  */
  172. void ff_vc1_mc_1mv(VC1Context *v, int dir)
  173. {
  174.     MpegEncContext *s = &v->s;
  175.     H264ChromaContext *h264chroma = &v->h264chroma;
  176.     uint8_t *srcY, *srcU, *srcV;
  177.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
  178.     int v_edge_pos = s->v_edge_pos >> v->field_mode;
  179.     int i;
  180.     uint8_t (*luty)[256], (*lutuv)[256];
  181.     int use_ic;
  182.  
  183.     if ((!v->field_mode ||
  184.          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&
  185.         !v->s.last_picture.f->data[0])
  186.         return;
  187.  
  188.     mx = s->mv[dir][0][0];
  189.     my = s->mv[dir][0][1];
  190.  
  191.     // store motion vectors for further use in B frames
  192.     if (s->pict_type == AV_PICTURE_TYPE_P) {
  193.         for (i = 0; i < 4; i++) {
  194.             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = mx;
  195.             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = my;
  196.         }
  197.     }
  198.  
  199.     uvmx = (mx + ((mx & 3) == 3)) >> 1;
  200.     uvmy = (my + ((my & 3) == 3)) >> 1;
  201.     v->luma_mv[s->mb_x][0] = uvmx;
  202.     v->luma_mv[s->mb_x][1] = uvmy;
  203.  
  204.     if (v->field_mode &&
  205.         v->cur_field_type != v->ref_field_type[dir]) {
  206.         my   = my   - 2 + 4 * v->cur_field_type;
  207.         uvmy = uvmy - 2 + 4 * v->cur_field_type;
  208.     }
  209.  
  210.     // fastuvmc shall be ignored for interlaced frame picture
  211.     if (v->fastuvmc && (v->fcm != ILACE_FRAME)) {
  212.         uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));
  213.         uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));
  214.     }
  215.     if (!dir) {
  216.         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {
  217.             srcY = s->current_picture.f->data[0];
  218.             srcU = s->current_picture.f->data[1];
  219.             srcV = s->current_picture.f->data[2];
  220.             luty  = v->curr_luty;
  221.             lutuv = v->curr_lutuv;
  222.             use_ic = *v->curr_use_ic;
  223.         } else {
  224.             srcY = s->last_picture.f->data[0];
  225.             srcU = s->last_picture.f->data[1];
  226.             srcV = s->last_picture.f->data[2];
  227.             luty  = v->last_luty;
  228.             lutuv = v->last_lutuv;
  229.             use_ic = v->last_use_ic;
  230.         }
  231.     } else {
  232.         srcY = s->next_picture.f->data[0];
  233.         srcU = s->next_picture.f->data[1];
  234.         srcV = s->next_picture.f->data[2];
  235.         luty  = v->next_luty;
  236.         lutuv = v->next_lutuv;
  237.         use_ic = v->next_use_ic;
  238.     }
  239.  
  240.     if (!srcY || !srcU) {
  241.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
  242.         return;
  243.     }
  244.  
  245.     src_x   = s->mb_x * 16 + (mx   >> 2);
  246.     src_y   = s->mb_y * 16 + (my   >> 2);
  247.     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);
  248.     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);
  249.  
  250.     if (v->profile != PROFILE_ADVANCED) {
  251.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
  252.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);
  253.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
  254.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
  255.     } else {
  256.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
  257.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);
  258.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
  259.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
  260.     }
  261.  
  262.     srcY += src_y   * s->linesize   + src_x;
  263.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
  264.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
  265.  
  266.     if (v->field_mode && v->ref_field_type[dir]) {
  267.         srcY += s->current_picture_ptr->f->linesize[0];
  268.         srcU += s->current_picture_ptr->f->linesize[1];
  269.         srcV += s->current_picture_ptr->f->linesize[2];
  270.     }
  271.  
  272.     /* for grayscale we should not try to read from unknown area */
  273.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY) {
  274.         srcU = s->sc.edge_emu_buffer + 18 * s->linesize;
  275.         srcV = s->sc.edge_emu_buffer + 18 * s->linesize;
  276.     }
  277.  
  278.     if (v->rangeredfrm || use_ic
  279.         || s->h_edge_pos < 22 || v_edge_pos < 22
  280.         || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel * 3
  281.         || (unsigned)(src_y - 1)        > v_edge_pos    - (my&3) - 16 - 3) {
  282.         uint8_t *ubuf = s->sc.edge_emu_buffer + 19 * s->linesize;
  283.         uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
  284.         const int k = 17 + s->mspel * 2;
  285.  
  286.         srcY -= s->mspel * (1 + s->linesize);
  287.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, srcY,
  288.                                  s->linesize, s->linesize,
  289.                                  k, k,
  290.                                  src_x - s->mspel, src_y - s->mspel,
  291.                                  s->h_edge_pos, v_edge_pos);
  292.         srcY = s->sc.edge_emu_buffer;
  293.         s->vdsp.emulated_edge_mc(ubuf, srcU,
  294.                                  s->uvlinesize, s->uvlinesize,
  295.                                  8 + 1, 8 + 1,
  296.                                  uvsrc_x, uvsrc_y,
  297.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);
  298.         s->vdsp.emulated_edge_mc(vbuf, srcV,
  299.                                  s->uvlinesize, s->uvlinesize,
  300.                                  8 + 1, 8 + 1,
  301.                                  uvsrc_x, uvsrc_y,
  302.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);
  303.         srcU = ubuf;
  304.         srcV = vbuf;
  305.         /* if we deal with range reduction we need to scale source blocks */
  306.         if (v->rangeredfrm) {
  307.             vc1_scale_luma(srcY, k, s->linesize);
  308.             vc1_scale_chroma(srcU, srcV, 9, s->uvlinesize);
  309.         }
  310.         /* if we deal with intensity compensation we need to scale source blocks */
  311.         if (use_ic) {
  312.             vc1_lut_scale_luma(srcY,
  313.                                luty[v->field_mode ? v->ref_field_type[dir] : ((0 + src_y - s->mspel) & 1)],
  314.                                luty[v->field_mode ? v->ref_field_type[dir] : ((1 + src_y - s->mspel) & 1)],
  315.                                k, s->linesize);
  316.             vc1_lut_scale_chroma(srcU, srcV,
  317.                                  lutuv[v->field_mode ? v->ref_field_type[dir] : ((0 + uvsrc_y) & 1)],
  318.                                  lutuv[v->field_mode ? v->ref_field_type[dir] : ((1 + uvsrc_y) & 1)],
  319.                                  9, s->uvlinesize);
  320.         }
  321.         srcY += s->mspel * (1 + s->linesize);
  322.     }
  323.  
  324.     if (s->mspel) {
  325.         dxy = ((my & 3) << 2) | (mx & 3);
  326.         v->vc1dsp.put_vc1_mspel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, v->rnd);
  327.     } else { // hpel mc - always used for luma
  328.         dxy = (my & 2) | ((mx & 2) >> 1);
  329.         if (!v->rnd)
  330.             s->hdsp.put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
  331.         else
  332.             s->hdsp.put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
  333.     }
  334.  
  335.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
  336.         return;
  337.     /* Chroma MC always uses qpel bilinear */
  338.     uvmx = (uvmx & 3) << 1;
  339.     uvmy = (uvmy & 3) << 1;
  340.     if (!v->rnd) {
  341.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
  342.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
  343.     } else {
  344.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
  345.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
  346.     }
  347. }
  348.  
  349. /** Do motion compensation for 4-MV macroblock - luminance block
  350.  */
  351. void ff_vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg)
  352. {
  353.     MpegEncContext *s = &v->s;
  354.     uint8_t *srcY;
  355.     int dxy, mx, my, src_x, src_y;
  356.     int off;
  357.     int fieldmv = (v->fcm == ILACE_FRAME) ? v->blk_mv_type[s->block_index[n]] : 0;
  358.     int v_edge_pos = s->v_edge_pos >> v->field_mode;
  359.     uint8_t (*luty)[256];
  360.     int use_ic;
  361.  
  362.     if ((!v->field_mode ||
  363.          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&
  364.         !v->s.last_picture.f->data[0])
  365.         return;
  366.  
  367.     mx = s->mv[dir][n][0];
  368.     my = s->mv[dir][n][1];
  369.  
  370.     if (!dir) {
  371.         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {
  372.             srcY = s->current_picture.f->data[0];
  373.             luty = v->curr_luty;
  374.             use_ic = *v->curr_use_ic;
  375.         } else {
  376.             srcY = s->last_picture.f->data[0];
  377.             luty = v->last_luty;
  378.             use_ic = v->last_use_ic;
  379.         }
  380.     } else {
  381.         srcY = s->next_picture.f->data[0];
  382.         luty = v->next_luty;
  383.         use_ic = v->next_use_ic;
  384.     }
  385.  
  386.     if (!srcY) {
  387.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
  388.         return;
  389.     }
  390.  
  391.     if (v->field_mode) {
  392.         if (v->cur_field_type != v->ref_field_type[dir])
  393.             my = my - 2 + 4 * v->cur_field_type;
  394.     }
  395.  
  396.     if (s->pict_type == AV_PICTURE_TYPE_P && n == 3 && v->field_mode) {
  397.         int opp_count = get_luma_mv(v, 0,
  398.                                     &s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],
  399.                                     &s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1]);
  400.         int k, f = opp_count > 2;
  401.         for (k = 0; k < 4; k++)
  402.             v->mv_f[1][s->block_index[k] + v->blocks_off] = f;
  403.     }
  404.  
  405.     if (v->fcm == ILACE_FRAME) {  // not sure if needed for other types of picture
  406.         int qx, qy;
  407.         int width  = s->avctx->coded_width;
  408.         int height = s->avctx->coded_height >> 1;
  409.         if (s->pict_type == AV_PICTURE_TYPE_P) {
  410.             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][0] = mx;
  411.             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][1] = my;
  412.         }
  413.         qx = (s->mb_x * 16) + (mx >> 2);
  414.         qy = (s->mb_y *  8) + (my >> 3);
  415.  
  416.         if (qx < -17)
  417.             mx -= 4 * (qx + 17);
  418.         else if (qx > width)
  419.             mx -= 4 * (qx - width);
  420.         if (qy < -18)
  421.             my -= 8 * (qy + 18);
  422.         else if (qy > height + 1)
  423.             my -= 8 * (qy - height - 1);
  424.     }
  425.  
  426.     if ((v->fcm == ILACE_FRAME) && fieldmv)
  427.         off = ((n > 1) ? s->linesize : 0) + (n & 1) * 8;
  428.     else
  429.         off = s->linesize * 4 * (n & 2) + (n & 1) * 8;
  430.  
  431.     src_x = s->mb_x * 16 + (n & 1) * 8 + (mx >> 2);
  432.     if (!fieldmv)
  433.         src_y = s->mb_y * 16 + (n & 2) * 4 + (my >> 2);
  434.     else
  435.         src_y = s->mb_y * 16 + ((n > 1) ? 1 : 0) + (my >> 2);
  436.  
  437.     if (v->profile != PROFILE_ADVANCED) {
  438.         src_x = av_clip(src_x, -16, s->mb_width  * 16);
  439.         src_y = av_clip(src_y, -16, s->mb_height * 16);
  440.     } else {
  441.         src_x = av_clip(src_x, -17, s->avctx->coded_width);
  442.         if (v->fcm == ILACE_FRAME) {
  443.             if (src_y & 1)
  444.                 src_y = av_clip(src_y, -17, s->avctx->coded_height + 1);
  445.             else
  446.                 src_y = av_clip(src_y, -18, s->avctx->coded_height);
  447.         } else {
  448.             src_y = av_clip(src_y, -18, s->avctx->coded_height + 1);
  449.         }
  450.     }
  451.  
  452.     srcY += src_y * s->linesize + src_x;
  453.     if (v->field_mode && v->ref_field_type[dir])
  454.         srcY += s->current_picture_ptr->f->linesize[0];
  455.  
  456.     if (fieldmv) {
  457.         if (!(src_y & 1))
  458.             v_edge_pos--;
  459.         else
  460.             src_y -= (src_y < 4);
  461.     }
  462.     if (v->rangeredfrm || use_ic
  463.         || s->h_edge_pos < 13 || v_edge_pos < 23
  464.         || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx & 3) - 8 - s->mspel * 2
  465.         || (unsigned)(src_y - (s->mspel << fieldmv)) > v_edge_pos - (my & 3) - ((8 + s->mspel * 2) << fieldmv)) {
  466.         const int k = 9 + s->mspel * 2;
  467.  
  468.         srcY -= s->mspel * (1 + (s->linesize << fieldmv));
  469.         /* check emulate edge stride and offset */
  470.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, srcY,
  471.                                  s->linesize, s->linesize,
  472.                                  k, k << fieldmv,
  473.                                  src_x - s->mspel, src_y - (s->mspel << fieldmv),
  474.                                  s->h_edge_pos, v_edge_pos);
  475.         srcY = s->sc.edge_emu_buffer;
  476.         /* if we deal with range reduction we need to scale source blocks */
  477.         if (v->rangeredfrm) {
  478.             vc1_scale_luma(srcY, k, s->linesize << fieldmv);
  479.         }
  480.         /* if we deal with intensity compensation we need to scale source blocks */
  481.         if (use_ic) {
  482.             vc1_lut_scale_luma(srcY,
  483.                                luty[v->field_mode ? v->ref_field_type[dir] : (((0<<fieldmv)+src_y - (s->mspel << fieldmv)) & 1)],
  484.                                luty[v->field_mode ? v->ref_field_type[dir] : (((1<<fieldmv)+src_y - (s->mspel << fieldmv)) & 1)],
  485.                                k, s->linesize << fieldmv);
  486.         }
  487.         srcY += s->mspel * (1 + (s->linesize << fieldmv));
  488.     }
  489.  
  490.     if (s->mspel) {
  491.         dxy = ((my & 3) << 2) | (mx & 3);
  492.         if (avg)
  493.             v->vc1dsp.avg_vc1_mspel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);
  494.         else
  495.             v->vc1dsp.put_vc1_mspel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);
  496.     } else { // hpel mc - always used for luma
  497.         dxy = (my & 2) | ((mx & 2) >> 1);
  498.         if (!v->rnd)
  499.             s->hdsp.put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
  500.         else
  501.             s->hdsp.put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
  502.     }
  503. }
  504.  
  505. /** Do motion compensation for 4-MV macroblock - both chroma blocks
  506.  */
  507. void ff_vc1_mc_4mv_chroma(VC1Context *v, int dir)
  508. {
  509.     MpegEncContext *s = &v->s;
  510.     H264ChromaContext *h264chroma = &v->h264chroma;
  511.     uint8_t *srcU, *srcV;
  512.     int uvmx, uvmy, uvsrc_x, uvsrc_y;
  513.     int16_t tx, ty;
  514.     int chroma_ref_type;
  515.     int v_edge_pos = s->v_edge_pos >> v->field_mode;
  516.     uint8_t (*lutuv)[256];
  517.     int use_ic;
  518.  
  519.     if (!v->field_mode && !v->s.last_picture.f->data[0])
  520.         return;
  521.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
  522.         return;
  523.  
  524.     /* calculate chroma MV vector from four luma MVs */
  525.     if (!v->field_mode || !v->numref) {
  526.         int valid_count = get_chroma_mv(v, dir, &tx, &ty);
  527.         if (!valid_count) {
  528.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
  529.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
  530.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;
  531.             return; //no need to do MC for intra blocks
  532.         }
  533.         chroma_ref_type = v->ref_field_type[dir];
  534.     } else {
  535.         int opp_count = get_luma_mv(v, dir, &tx, &ty);
  536.         chroma_ref_type = v->cur_field_type ^ (opp_count > 2);
  537.     }
  538.     if (v->field_mode && chroma_ref_type == 1 && v->cur_field_type == 1 && !v->s.last_picture.f->data[0])
  539.         return;
  540.     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;
  541.     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;
  542.     uvmx = (tx + ((tx & 3) == 3)) >> 1;
  543.     uvmy = (ty + ((ty & 3) == 3)) >> 1;
  544.  
  545.     v->luma_mv[s->mb_x][0] = uvmx;
  546.     v->luma_mv[s->mb_x][1] = uvmy;
  547.  
  548.     if (v->fastuvmc) {
  549.         uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));
  550.         uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));
  551.     }
  552.     // Field conversion bias
  553.     if (v->cur_field_type != chroma_ref_type)
  554.         uvmy += 2 - 4 * chroma_ref_type;
  555.  
  556.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
  557.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
  558.  
  559.     if (v->profile != PROFILE_ADVANCED) {
  560.         uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width  * 8);
  561.         uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
  562.     } else {
  563.         uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);
  564.         uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
  565.     }
  566.  
  567.     if (!dir) {
  568.         if (v->field_mode && (v->cur_field_type != chroma_ref_type) && v->second_field) {
  569.             srcU = s->current_picture.f->data[1];
  570.             srcV = s->current_picture.f->data[2];
  571.             lutuv = v->curr_lutuv;
  572.             use_ic = *v->curr_use_ic;
  573.         } else {
  574.             srcU = s->last_picture.f->data[1];
  575.             srcV = s->last_picture.f->data[2];
  576.             lutuv = v->last_lutuv;
  577.             use_ic = v->last_use_ic;
  578.         }
  579.     } else {
  580.         srcU = s->next_picture.f->data[1];
  581.         srcV = s->next_picture.f->data[2];
  582.         lutuv = v->next_lutuv;
  583.         use_ic = v->next_use_ic;
  584.     }
  585.  
  586.     if (!srcU) {
  587.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
  588.         return;
  589.     }
  590.  
  591.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
  592.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
  593.  
  594.     if (v->field_mode) {
  595.         if (chroma_ref_type) {
  596.             srcU += s->current_picture_ptr->f->linesize[1];
  597.             srcV += s->current_picture_ptr->f->linesize[2];
  598.         }
  599.     }
  600.  
  601.     if (v->rangeredfrm || use_ic
  602.         || s->h_edge_pos < 18 || v_edge_pos < 18
  603.         || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
  604.         || (unsigned)uvsrc_y > (v_edge_pos    >> 1) - 9) {
  605.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, srcU,
  606.                                  s->uvlinesize, s->uvlinesize,
  607.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,
  608.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);
  609.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16, srcV,
  610.                                  s->uvlinesize, s->uvlinesize,
  611.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,
  612.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);
  613.         srcU = s->sc.edge_emu_buffer;
  614.         srcV = s->sc.edge_emu_buffer + 16;
  615.  
  616.         /* if we deal with range reduction we need to scale source blocks */
  617.         if (v->rangeredfrm) {
  618.             vc1_scale_chroma(srcU, srcV, 9, s->uvlinesize);
  619.         }
  620.         /* if we deal with intensity compensation we need to scale source blocks */
  621.         if (use_ic) {
  622.             vc1_lut_scale_chroma(srcU, srcV,
  623.                                  lutuv[v->field_mode ? chroma_ref_type : ((0 + uvsrc_y) & 1)],
  624.                                  lutuv[v->field_mode ? chroma_ref_type : ((1 + uvsrc_y) & 1)],
  625.                                  9, s->uvlinesize);
  626.         }
  627.     }
  628.  
  629.     /* Chroma MC always uses qpel bilinear */
  630.     uvmx = (uvmx & 3) << 1;
  631.     uvmy = (uvmy & 3) << 1;
  632.     if (!v->rnd) {
  633.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
  634.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
  635.     } else {
  636.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
  637.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
  638.     }
  639. }
  640.  
  641. /** Do motion compensation for 4-MV interlaced frame chroma macroblock (both U and V)
  642.  */
  643. void ff_vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg)
  644. {
  645.     MpegEncContext *s = &v->s;
  646.     H264ChromaContext *h264chroma = &v->h264chroma;
  647.     uint8_t *srcU, *srcV;
  648.     int uvsrc_x, uvsrc_y;
  649.     int uvmx_field[4], uvmy_field[4];
  650.     int i, off, tx, ty;
  651.     int fieldmv = v->blk_mv_type[s->block_index[0]];
  652.     static const uint8_t s_rndtblfield[16] = { 0, 0, 1, 2, 4, 4, 5, 6, 2, 2, 3, 8, 6, 6, 7, 12 };
  653.     int v_dist = fieldmv ? 1 : 4; // vertical offset for lower sub-blocks
  654.     int v_edge_pos = s->v_edge_pos >> 1;
  655.     int use_ic;
  656.     uint8_t (*lutuv)[256];
  657.  
  658.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
  659.         return;
  660.  
  661.     for (i = 0; i < 4; i++) {
  662.         int d = i < 2 ? dir: dir2;
  663.         tx = s->mv[d][i][0];
  664.         uvmx_field[i] = (tx + ((tx & 3) == 3)) >> 1;
  665.         ty = s->mv[d][i][1];
  666.         if (fieldmv)
  667.             uvmy_field[i] = (ty >> 4) * 8 + s_rndtblfield[ty & 0xF];
  668.         else
  669.             uvmy_field[i] = (ty + ((ty & 3) == 3)) >> 1;
  670.     }
  671.  
  672.     for (i = 0; i < 4; i++) {
  673.         off = (i & 1) * 4 + ((i & 2) ? v_dist * s->uvlinesize : 0);
  674.         uvsrc_x = s->mb_x * 8 +  (i & 1) * 4           + (uvmx_field[i] >> 2);
  675.         uvsrc_y = s->mb_y * 8 + ((i & 2) ? v_dist : 0) + (uvmy_field[i] >> 2);
  676.         // FIXME: implement proper pull-back (see vc1cropmv.c, vc1CROPMV_ChromaPullBack())
  677.         uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);
  678.         uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
  679.         if (i < 2 ? dir : dir2) {
  680.             srcU = s->next_picture.f->data[1];
  681.             srcV = s->next_picture.f->data[2];
  682.             lutuv  = v->next_lutuv;
  683.             use_ic = v->next_use_ic;
  684.         } else {
  685.             srcU = s->last_picture.f->data[1];
  686.             srcV = s->last_picture.f->data[2];
  687.             lutuv  = v->last_lutuv;
  688.             use_ic = v->last_use_ic;
  689.         }
  690.         if (!srcU)
  691.             return;
  692.         srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
  693.         srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
  694.         uvmx_field[i] = (uvmx_field[i] & 3) << 1;
  695.         uvmy_field[i] = (uvmy_field[i] & 3) << 1;
  696.  
  697.         if (fieldmv) {
  698.             if (!(uvsrc_y & 1))
  699.                 v_edge_pos = (s->v_edge_pos >> 1) - 1;
  700.             else
  701.                 uvsrc_y -= (uvsrc_y < 2);
  702.         }
  703.         if (use_ic
  704.             || s->h_edge_pos < 10 || v_edge_pos < (5 << fieldmv)
  705.             || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 5
  706.             || (unsigned)uvsrc_y > v_edge_pos - (5 << fieldmv)) {
  707.             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, srcU,
  708.                                      s->uvlinesize, s->uvlinesize,
  709.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,
  710.                                      s->h_edge_pos >> 1, v_edge_pos);
  711.             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16, srcV,
  712.                                      s->uvlinesize, s->uvlinesize,
  713.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,
  714.                                      s->h_edge_pos >> 1, v_edge_pos);
  715.             srcU = s->sc.edge_emu_buffer;
  716.             srcV = s->sc.edge_emu_buffer + 16;
  717.  
  718.             /* if we deal with intensity compensation we need to scale source blocks */
  719.             if (use_ic) {
  720.                 vc1_lut_scale_chroma(srcU, srcV,
  721.                                      lutuv[(uvsrc_y + (0 << fieldmv)) & 1],
  722.                                      lutuv[(uvsrc_y + (1 << fieldmv)) & 1],
  723.                                      5, s->uvlinesize << fieldmv);
  724.             }
  725.         }
  726.         if (avg) {
  727.             if (!v->rnd) {
  728.                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  729.                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  730.             } else {
  731.                 v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  732.                 v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  733.             }
  734.         } else {
  735.             if (!v->rnd) {
  736.                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  737.                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  738.             } else {
  739.                 v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  740.                 v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
  741.             }
  742.         }
  743.     }
  744. }
  745.  
  746. /** Motion compensation for direct or interpolated blocks in B-frames
  747.  */
  748. void ff_vc1_interp_mc(VC1Context *v)
  749. {
  750.     MpegEncContext *s = &v->s;
  751.     H264ChromaContext *h264chroma = &v->h264chroma;
  752.     uint8_t *srcY, *srcU, *srcV;
  753.     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
  754.     int v_edge_pos = s->v_edge_pos >> v->field_mode;
  755.     int use_ic = v->next_use_ic;
  756.  
  757.     if (!v->field_mode && !v->s.next_picture.f->data[0])
  758.         return;
  759.  
  760.     mx   = s->mv[1][0][0];
  761.     my   = s->mv[1][0][1];
  762.     uvmx = (mx + ((mx & 3) == 3)) >> 1;
  763.     uvmy = (my + ((my & 3) == 3)) >> 1;
  764.     if (v->field_mode && v->cur_field_type != v->ref_field_type[1]) {
  765.         my   = my   - 2 + 4 * v->cur_field_type;
  766.         uvmy = uvmy - 2 + 4 * v->cur_field_type;
  767.     }
  768.     if (v->fastuvmc) {
  769.         uvmx = uvmx + ((uvmx < 0) ? -(uvmx & 1) : (uvmx & 1));
  770.         uvmy = uvmy + ((uvmy < 0) ? -(uvmy & 1) : (uvmy & 1));
  771.     }
  772.     srcY = s->next_picture.f->data[0];
  773.     srcU = s->next_picture.f->data[1];
  774.     srcV = s->next_picture.f->data[2];
  775.  
  776.     src_x   = s->mb_x * 16 + (mx   >> 2);
  777.     src_y   = s->mb_y * 16 + (my   >> 2);
  778.     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);
  779.     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);
  780.  
  781.     if (v->profile != PROFILE_ADVANCED) {
  782.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
  783.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);
  784.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
  785.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
  786.     } else {
  787.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
  788.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);
  789.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
  790.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
  791.     }
  792.  
  793.     srcY += src_y   * s->linesize   + src_x;
  794.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
  795.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
  796.  
  797.     if (v->field_mode && v->ref_field_type[1]) {
  798.         srcY += s->current_picture_ptr->f->linesize[0];
  799.         srcU += s->current_picture_ptr->f->linesize[1];
  800.         srcV += s->current_picture_ptr->f->linesize[2];
  801.     }
  802.  
  803.     /* for grayscale we should not try to read from unknown area */
  804.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY) {
  805.         srcU = s->sc.edge_emu_buffer + 18 * s->linesize;
  806.         srcV = s->sc.edge_emu_buffer + 18 * s->linesize;
  807.     }
  808.  
  809.     if (v->rangeredfrm || s->h_edge_pos < 22 || v_edge_pos < 22 || use_ic
  810.         || (unsigned)(src_x - 1) > s->h_edge_pos - (mx & 3) - 16 - 3
  811.         || (unsigned)(src_y - 1) > v_edge_pos    - (my & 3) - 16 - 3) {
  812.         uint8_t *ubuf = s->sc.edge_emu_buffer + 19 * s->linesize;
  813.         uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
  814.         const int k = 17 + s->mspel * 2;
  815.  
  816.         srcY -= s->mspel * (1 + s->linesize);
  817.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, srcY,
  818.                                  s->linesize, s->linesize,
  819.                                  k, k,
  820.                                  src_x - s->mspel, src_y - s->mspel,
  821.                                  s->h_edge_pos, v_edge_pos);
  822.         srcY = s->sc.edge_emu_buffer;
  823.         s->vdsp.emulated_edge_mc(ubuf, srcU,
  824.                                  s->uvlinesize, s->uvlinesize,
  825.                                  8 + 1, 8 + 1,
  826.                                  uvsrc_x, uvsrc_y,
  827.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);
  828.         s->vdsp.emulated_edge_mc(vbuf, srcV,
  829.                                  s->uvlinesize, s->uvlinesize,
  830.                                  8 + 1, 8 + 1,
  831.                                  uvsrc_x, uvsrc_y,
  832.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);
  833.         srcU = ubuf;
  834.         srcV = vbuf;
  835.         /* if we deal with range reduction we need to scale source blocks */
  836.         if (v->rangeredfrm) {
  837.             vc1_scale_luma(srcY, k, s->linesize);
  838.             vc1_scale_chroma(srcU, srcV, 9, s->uvlinesize);
  839.         }
  840.  
  841.         if (use_ic) {
  842.             uint8_t (*luty )[256] = v->next_luty;
  843.             uint8_t (*lutuv)[256] = v->next_lutuv;
  844.             vc1_lut_scale_luma(srcY,
  845.                                luty[v->field_mode ? v->ref_field_type[1] : ((0+src_y - s->mspel) & 1)],
  846.                                luty[v->field_mode ? v->ref_field_type[1] : ((1+src_y - s->mspel) & 1)],
  847.                                k, s->linesize);
  848.             vc1_lut_scale_chroma(srcU, srcV,
  849.                                  lutuv[v->field_mode ? v->ref_field_type[1] : ((0+uvsrc_y) & 1)],
  850.                                  lutuv[v->field_mode ? v->ref_field_type[1] : ((1+uvsrc_y) & 1)],
  851.                                  9, s->uvlinesize);
  852.         }
  853.         srcY += s->mspel * (1 + s->linesize);
  854.     }
  855.  
  856.     if (s->mspel) {
  857.         dxy = ((my & 3) << 2) | (mx & 3);
  858.         v->vc1dsp.avg_vc1_mspel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, v->rnd);
  859.     } else { // hpel mc
  860.         dxy = (my & 2) | ((mx & 2) >> 1);
  861.  
  862.         if (!v->rnd)
  863.             s->hdsp.avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
  864.         else
  865.             s->hdsp.avg_no_rnd_pixels_tab[dxy](s->dest[0], srcY, s->linesize, 16);
  866.     }
  867.  
  868.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
  869.         return;
  870.     /* Chroma MC always uses qpel blilinear */
  871.     uvmx = (uvmx & 3) << 1;
  872.     uvmy = (uvmy & 3) << 1;
  873.     if (!v->rnd) {
  874.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
  875.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
  876.     } else {
  877.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
  878.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
  879.     }
  880. }
  881.