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FFmpeg/libavcodec/vc1_mc.c

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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 Libav.

  8.  *

  9.  * Libav 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.  * Libav 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 Libav; 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. /** Do motion compensation over 1 macroblock

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

  37.  */

  38. void ff_vc1_mc_1mv(VC1Context *v, int dir)

  39. {

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

  41.     H264ChromaContext *h264chroma = &v->h264chroma;

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

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

  44.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  45.     int i;

  46.     uint8_t (*luty)[256], (*lutuv)[256];

  47.     int use_ic;

  48. 

  49.     if ((!v->field_mode ||

  50.          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&

  51.         !v->s.last_picture.f->data[0])

  52.         return;

  53. 

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

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

  56. 

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

  58.     if (s->pict_type == AV_PICTURE_TYPE_P) {

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

  60.             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = mx;

  61.             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = my;

  62.         }

  63.     }

  64. 

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

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

  67.     v->luma_mv[s->mb_x][0] = uvmx;

  68.     v->luma_mv[s->mb_x][1] = uvmy;

  69. 

  70.     if (v->field_mode &&

  71.         v->cur_field_type != v->ref_field_type[dir]) {

  72.         my   = my   - 2 + 4 * v->cur_field_type;

  73.         uvmy = uvmy - 2 + 4 * v->cur_field_type;

  74.     }

  75. 

  76.     // fastuvmc shall be ignored for interlaced frame picture

  77.     if (v->fastuvmc && (v->fcm != ILACE_FRAME)) {

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

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

  80.     }

  81.     if (!dir) {

  82.         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {

  83.             srcY = s->current_picture.f->data[0];

  84.             srcU = s->current_picture.f->data[1];

  85.             srcV = s->current_picture.f->data[2];

  86.             luty  = v->curr_luty;

  87.             lutuv = v->curr_lutuv;

  88.             use_ic = v->curr_use_ic;

  89.         } else {

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

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

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

  93.             luty  = v->last_luty;

  94.             lutuv = v->last_lutuv;

  95.             use_ic = v->last_use_ic;

  96.         }

  97.     } else {

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

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

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

  101.         luty  = v->next_luty;

  102.         lutuv = v->next_lutuv;

  103.         use_ic = v->next_use_ic;

  104.     }

  105. 

  106.     if (!srcY || !srcU) {

  107.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");

  108.         return;

  109.     }

  110. 

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

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

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

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

  115. 

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

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

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

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

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

  121.     } else {

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

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

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

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

  126.     }

  127. 

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

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

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

  131. 

  132.     if (v->field_mode && v->ref_field_type[dir]) {

  133.         srcY += s->current_picture_ptr->f->linesize[0];

  134.         srcU += s->current_picture_ptr->f->linesize[1];

  135.         srcV += s->current_picture_ptr->f->linesize[2];

  136.     }

  137. 

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

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

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

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

  142.     }

  143. 

  144.     if (v->rangeredfrm || use_ic

  145.         || s->h_edge_pos < 22 || v_edge_pos < 22

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

  147.         || (unsigned)(src_y - 1)        > v_edge_pos    - (my&3) - 16 - 3) {

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

  149. 

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

  151.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,

  152.                                  s->linesize, s->linesize,

  153.                                  17 + s->mspel * 2, 17 + s->mspel * 2,

  154.                                  src_x - s->mspel, src_y - s->mspel,

  155.                                  s->h_edge_pos, v_edge_pos);

  156.         srcY = s->edge_emu_buffer;

  157.         s->vdsp.emulated_edge_mc(uvbuf, srcU,

  158.                                  s->uvlinesize, s->uvlinesize,

  159.                                  8 + 1, 8 + 1,

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

  161.         s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,

  162.                                  s->uvlinesize, s->uvlinesize,

  163.                                  8 + 1, 8 + 1,

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

  165.         srcU = uvbuf;

  166.         srcV = uvbuf + 16;

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

  168.         if (v->rangeredfrm) {

  169.             int i, j;

  170.             uint8_t *src, *src2;

  171. 

  172.             src = srcY;

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

  174.                 for (i = 0; i < 17 + s->mspel * 2; i++)

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

  176.                 src += s->linesize;

  177.             }

  178.             src  = srcU;

  179.             src2 = srcV;

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

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

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

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

  184.                 }

  185.                 src  += s->uvlinesize;

  186.                 src2 += s->uvlinesize;

  187.             }

  188.         }

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

  190.         if (use_ic) {

  191.             int i, j;

  192.             uint8_t *src, *src2;

  193. 

  194.             src = srcY;

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

  196.                 int f = v->field_mode ? v->ref_field_type[dir] : ((j + src_y - s->mspel) & 1) ;

  197.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  198.                     src[i] = luty[f][src[i]];

  199.                 src += s->linesize;

  200.             }

  201.             src  = srcU;

  202.             src2 = srcV;

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

  204.                 int f = v->field_mode ? v->ref_field_type[dir] : ((j + uvsrc_y) & 1);

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

  206.                     src[i]  = lutuv[f][src[i]];

  207.                     src2[i] = lutuv[f][src2[i]];

  208.                 }

  209.                 src  += s->uvlinesize;

  210.                 src2 += s->uvlinesize;

  211.             }

  212.         }

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

  214.     }

  215. 

  216.     if (s->mspel) {

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

  218.         v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  219.         v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);

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

  221.         v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  222.         v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

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

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

  225.         if (!v->rnd)

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

  227.         else

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

  229.     }

  230. 

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

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

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

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

  235.     if (!v->rnd) {

  236.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  237.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  238.     } else {

  239.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  240.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  241.     }

  242. }

  243. 

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

  245. {

  246.     if (a < b) {

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

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

  249.     } else {

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

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

  252.     }

  253. }

  254. 

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

  256.  */

  257. void ff_vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg)

  258. {

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

  260.     uint8_t *srcY;

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

  262.     int off;

  263.     int fieldmv = (v->fcm == ILACE_FRAME) ? v->blk_mv_type[s->block_index[n]] : 0;

  264.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  265.     uint8_t (*luty)[256];

  266.     int use_ic;

  267. 

  268.     if ((!v->field_mode ||

  269.          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&

  270.         !v->s.last_picture.f->data[0])

  271.         return;

  272. 

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

  274.     my = s->mv[dir][n][1];

  275. 

  276.     if (!dir) {

  277.         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {

  278.             srcY = s->current_picture.f->data[0];

  279.             luty = v->curr_luty;

  280.             use_ic = v->curr_use_ic;

  281.         } else {

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

  283.             luty = v->last_luty;

  284.             use_ic = v->last_use_ic;

  285.         }

  286.     } else {

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

  288.         luty = v->next_luty;

  289.         use_ic = v->next_use_ic;

  290.     }

  291. 

  292.     if (!srcY) {

  293.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");

  294.         return;

  295.     }

  296. 

  297.     if (v->field_mode) {

  298.         if (v->cur_field_type != v->ref_field_type[dir])

  299.             my = my - 2 + 4 * v->cur_field_type;

  300.     }

  301. 

  302.     if (s->pict_type == AV_PICTURE_TYPE_P && n == 3 && v->field_mode) {

  303.         int same_count = 0, opp_count = 0, k;

  304.         int chosen_mv[2][4][2], f;

  305.         int tx = 0, ty = 0;

  306.         for (k = 0; k < 4; k++) {

  307.             f = v->mv_f[0][s->block_index[k] + v->blocks_off];

  308.             chosen_mv[f][f ? opp_count : same_count][0] = s->mv[0][k][0];

  309.             chosen_mv[f][f ? opp_count : same_count][1] = s->mv[0][k][1];

  310.             opp_count  += f;

  311.             same_count += 1 - f;

  312.         }

  313.         f = opp_count > same_count;

  314.         switch (f ? opp_count : same_count) {

  315.         case 4:

  316.             tx = median4(chosen_mv[f][0][0], chosen_mv[f][1][0],

  317.                          chosen_mv[f][2][0], chosen_mv[f][3][0]);

  318.             ty = median4(chosen_mv[f][0][1], chosen_mv[f][1][1],

  319.                          chosen_mv[f][2][1], chosen_mv[f][3][1]);

  320.             break;

  321.         case 3:

  322.             tx = mid_pred(chosen_mv[f][0][0], chosen_mv[f][1][0], chosen_mv[f][2][0]);

  323.             ty = mid_pred(chosen_mv[f][0][1], chosen_mv[f][1][1], chosen_mv[f][2][1]);

  324.             break;

  325.         case 2:

  326.             tx = (chosen_mv[f][0][0] + chosen_mv[f][1][0]) / 2;

  327.             ty = (chosen_mv[f][0][1] + chosen_mv[f][1][1]) / 2;

  328.             break;

  329.         }

  330.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;

  331.         s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;

  332.         for (k = 0; k < 4; k++)

  333.             v->mv_f[1][s->block_index[k] + v->blocks_off] = f;

  334.     }

  335. 

  336.     if (v->fcm == ILACE_FRAME) {  // not sure if needed for other types of picture

  337.         int qx, qy;

  338.         int width  = s->avctx->coded_width;

  339.         int height = s->avctx->coded_height >> 1;

  340.         if (s->pict_type == AV_PICTURE_TYPE_P) {

  341.             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][0] = mx;

  342.             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][1] = my;

  343.         }

  344.         qx = (s->mb_x * 16) + (mx >> 2);

  345.         qy = (s->mb_y *  8) + (my >> 3);

  346. 

  347.         if (qx < -17)

  348.             mx -= 4 * (qx + 17);

  349.         else if (qx > width)

  350.             mx -= 4 * (qx - width);

  351.         if (qy < -18)

  352.             my -= 8 * (qy + 18);

  353.         else if (qy > height + 1)

  354.             my -= 8 * (qy - height - 1);

  355.     }

  356. 

  357.     if ((v->fcm == ILACE_FRAME) && fieldmv)

  358.         off = ((n > 1) ? s->linesize : 0) + (n & 1) * 8;

  359.     else

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

  361. 

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

  363.     if (!fieldmv)

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

  365.     else

  366.         src_y = s->mb_y * 16 + ((n > 1) ? 1 : 0) + (my >> 2);

  367. 

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

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

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

  371.     } else {

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

  373.         if (v->fcm == ILACE_FRAME) {

  374.             if (src_y & 1)

  375.                 src_y = av_clip(src_y, -17, s->avctx->coded_height + 1);

  376.             else

  377.                 src_y = av_clip(src_y, -18, s->avctx->coded_height);

  378.         } else {

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

  380.         }

  381.     }

  382. 

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

  384.     if (v->field_mode && v->ref_field_type[dir])

  385.         srcY += s->current_picture_ptr->f->linesize[0];

  386. 

  387.     if (fieldmv && !(src_y & 1))

  388.         v_edge_pos--;

  389.     if (fieldmv && (src_y & 1) && src_y < 4)

  390.         src_y--;

  391.     if (v->rangeredfrm || use_ic

  392.         || s->h_edge_pos < 13 || v_edge_pos < 23

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

  394.         || (unsigned)(src_y - (s->mspel << fieldmv)) > v_edge_pos - (my & 3) - ((8 + s->mspel * 2) << fieldmv)) {

  395.         srcY -= s->mspel * (1 + (s->linesize << fieldmv));

  396.         /* check emulate edge stride and offset */

  397.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,

  398.                                  s->linesize, s->linesize,

  399.                                  9 + s->mspel * 2, (9 + s->mspel * 2) << fieldmv,

  400.                                  src_x - s->mspel, src_y - (s->mspel << fieldmv),

  401.                                  s->h_edge_pos, v_edge_pos);

  402.         srcY = s->edge_emu_buffer;

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

  404.         if (v->rangeredfrm) {

  405.             int i, j;

  406.             uint8_t *src;

  407. 

  408.             src = srcY;

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

  410.                 for (i = 0; i < 9 + s->mspel * 2; i++)

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

  412.                 src += s->linesize << fieldmv;

  413.             }

  414.         }

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

  416.         if (use_ic) {

  417.             int i, j;

  418.             uint8_t *src;

  419. 

  420.             src = srcY;

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

  422.                 int f = v->field_mode ? v->ref_field_type[dir] : (((j<<fieldmv)+src_y - (s->mspel << fieldmv)) & 1);

  423.                 for (i = 0; i < 9 + s->mspel * 2; i++)

  424.                     src[i] = luty[f][src[i]];

  425.                 src += s->linesize << fieldmv;

  426.             }

  427.         }

  428.         srcY += s->mspel * (1 + (s->linesize << fieldmv));

  429.     }

  430. 

  431.     if (s->mspel) {

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

  433.         if (avg)

  434.             v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);

  435.         else

  436.             v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);

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

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

  439.         if (!v->rnd)

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

  441.         else

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

  443.     }

  444. }

  445. 

  446. static av_always_inline int get_chroma_mv(int *mvx, int *mvy, int *a, int flag, int *tx, int *ty)

  447. {

  448.     int idx, i;

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

  450. 

  451.     idx =  ((a[3] != flag) << 3)

  452.          | ((a[2] != flag) << 2)

  453.          | ((a[1] != flag) << 1)

  454.          |  (a[0] != flag);

  455.     if (!idx) {

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

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

  458.         return 4;

  459.     } else if (count[idx] == 1) {

  460.         switch (idx) {

  461.         case 0x1:

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

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

  464.             return 3;

  465.         case 0x2:

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

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

  468.             return 3;

  469.         case 0x4:

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

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

  472.             return 3;

  473.         case 0x8:

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

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

  476.             return 3;

  477.         }

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

  479.         int t1 = 0, t2 = 0;

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

  481.             if (!a[i]) {

  482.                 t1 = i;

  483.                 break;

  484.             }

  485.         for (i = t1 + 1; i < 4; i++)

  486.             if (!a[i]) {

  487.                 t2 = i;

  488.                 break;

  489.             }

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

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

  492.         return 2;

  493.     } else {

  494.         return 0;

  495.     }

  496.     return -1;

  497. }

  498. 

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

  500.  */

  501. void ff_vc1_mc_4mv_chroma(VC1Context *v, int dir)

  502. {

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

  504.     H264ChromaContext *h264chroma = &v->h264chroma;

  505.     uint8_t *srcU, *srcV;

  506.     int uvmx, uvmy, uvsrc_x, uvsrc_y;

  507.     int k, tx = 0, ty = 0;

  508.     int mvx[4], mvy[4], intra[4], mv_f[4];

  509.     int valid_count;

  510.     int chroma_ref_type = v->cur_field_type;

  511.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  512.     uint8_t (*lutuv)[256];

  513.     int use_ic;

  514. 

  515.     if (!v->field_mode && !v->s.last_picture.f->data[0])

  516.         return;

  517.     if (s->flags & CODEC_FLAG_GRAY)

  518.         return;

  519. 

  520.     for (k = 0; k < 4; k++) {

  521.         mvx[k] = s->mv[dir][k][0];

  522.         mvy[k] = s->mv[dir][k][1];

  523.         intra[k] = v->mb_type[0][s->block_index[k]];

  524.         if (v->field_mode)

  525.             mv_f[k] = v->mv_f[dir][s->block_index[k] + v->blocks_off];

  526.     }

  527. 

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

  529.     if (!v->field_mode || (v->field_mode && !v->numref)) {

  530.         valid_count = get_chroma_mv(mvx, mvy, intra, 0, &tx, &ty);

  531.         chroma_ref_type = v->reffield;

  532.         if (!valid_count) {

  533.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;

  534.             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;

  535.             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;

  536.             return; //no need to do MC for intra blocks

  537.         }

  538.     } else {

  539.         int dominant = 0;

  540.         if (mv_f[0] + mv_f[1] + mv_f[2] + mv_f[3] > 2)

  541.             dominant = 1;

  542.         valid_count = get_chroma_mv(mvx, mvy, mv_f, dominant, &tx, &ty);

  543.         if (dominant)

  544.             chroma_ref_type = !v->cur_field_type;

  545.     }

  546.     if (v->field_mode && chroma_ref_type == 1 && v->cur_field_type == 1 && !v->s.last_picture.f->data[0])

  547.         return;

  548.     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;

  549.     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;

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

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

  552. 

  553.     v->luma_mv[s->mb_x][0] = uvmx;

  554.     v->luma_mv[s->mb_x][1] = uvmy;

  555. 

  556.     if (v->fastuvmc) {

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

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

  559.     }

  560.     // Field conversion bias

  561.     if (v->cur_field_type != chroma_ref_type)

  562.         uvmy += 2 - 4 * chroma_ref_type;

  563. 

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

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

  566. 

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

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

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

  570.     } else {

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

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

  573.     }

  574. 

  575.     if (!dir) {

  576.         if (v->field_mode && (v->cur_field_type != chroma_ref_type) && v->second_field) {

  577.             srcU = s->current_picture.f->data[1];

  578.             srcV = s->current_picture.f->data[2];

  579.             lutuv = v->curr_lutuv;

  580.             use_ic = v->curr_use_ic;

  581.         } else {

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

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

  584.             lutuv = v->last_lutuv;

  585.             use_ic = v->last_use_ic;

  586.         }

  587.     } else {

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

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

  590.         lutuv = v->next_lutuv;

  591.         use_ic = v->next_use_ic;

  592.     }

  593. 

  594.     if (!srcU) {

  595.         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");

  596.         return;

  597.     }

  598. 

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

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

  601. 

  602.     if (v->field_mode) {

  603.         if (chroma_ref_type) {

  604.             srcU += s->current_picture_ptr->f->linesize[1];

  605.             srcV += s->current_picture_ptr->f->linesize[2];

  606.         }

  607.     }

  608. 

  609.     if (v->rangeredfrm || use_ic

  610.         || s->h_edge_pos < 18 || v_edge_pos < 18

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

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

  613.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcU,

  614.                                  s->uvlinesize, s->uvlinesize,

  615.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

  616.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  617.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV,

  618.                                  s->uvlinesize, s->uvlinesize,

  619.                                  8 + 1, 8 + 1, uvsrc_x, uvsrc_y,

  620.                                  s->h_edge_pos >> 1, v_edge_pos >> 1);

  621.         srcU = s->edge_emu_buffer;

  622.         srcV = s->edge_emu_buffer + 16;

  623. 

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

  625.         if (v->rangeredfrm) {

  626.             int i, j;

  627.             uint8_t *src, *src2;

  628. 

  629.             src  = srcU;

  630.             src2 = srcV;

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

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

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

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

  635.                 }

  636.                 src  += s->uvlinesize;

  637.                 src2 += s->uvlinesize;

  638.             }

  639.         }

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

  641.         if (use_ic) {

  642.             int i, j;

  643.             uint8_t *src, *src2;

  644. 

  645.             src  = srcU;

  646.             src2 = srcV;

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

  648.                 int f = v->field_mode ? chroma_ref_type : ((j + uvsrc_y) & 1);

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

  650.                     src[i]  = lutuv[f][src[i]];

  651.                     src2[i] = lutuv[f][src2[i]];

  652.                 }

  653.                 src  += s->uvlinesize;

  654.                 src2 += s->uvlinesize;

  655.             }

  656.         }

  657.     }

  658. 

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

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

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

  662.     if (!v->rnd) {

  663.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  664.         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  665.     } else {

  666.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  667.         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  668.     }

  669. }

  670. 

  671. /** Do motion compensation for 4-MV interlaced frame chroma macroblock (both U and V)

  672.  */

  673. void ff_vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg)

  674. {

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

  676.     H264ChromaContext *h264chroma = &v->h264chroma;

  677.     uint8_t *srcU, *srcV;

  678.     int uvsrc_x, uvsrc_y;

  679.     int uvmx_field[4], uvmy_field[4];

  680.     int i, off, tx, ty;

  681.     int fieldmv = v->blk_mv_type[s->block_index[0]];

  682.     static const int s_rndtblfield[16] = { 0, 0, 1, 2, 4, 4, 5, 6, 2, 2, 3, 8, 6, 6, 7, 12 };

  683.     int v_dist = fieldmv ? 1 : 4; // vertical offset for lower sub-blocks

  684.     int v_edge_pos = s->v_edge_pos >> 1;

  685.     int use_ic;

  686.     uint8_t (*lutuv)[256];

  687. 

  688.     if (s->flags & CODEC_FLAG_GRAY)

  689.         return;

  690. 

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

  692.         int d = i < 2 ? dir: dir2;

  693.         tx = s->mv[d][i][0];

  694.         uvmx_field[i] = (tx + ((tx & 3) == 3)) >> 1;

  695.         ty = s->mv[d][i][1];

  696.         if (fieldmv)

  697.             uvmy_field[i] = (ty >> 4) * 8 + s_rndtblfield[ty & 0xF];

  698.         else

  699.             uvmy_field[i] = (ty + ((ty & 3) == 3)) >> 1;

  700.     }

  701. 

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

  703.         off = (i & 1) * 4 + ((i & 2) ? v_dist * s->uvlinesize : 0);

  704.         uvsrc_x = s->mb_x * 8 +  (i & 1) * 4           + (uvmx_field[i] >> 2);

  705.         uvsrc_y = s->mb_y * 8 + ((i & 2) ? v_dist : 0) + (uvmy_field[i] >> 2);

  706.         // FIXME: implement proper pull-back (see vc1cropmv.c, vc1CROPMV_ChromaPullBack())

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

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

  709.         if (i < 2 ? dir : dir2) {

  710.             srcU = s->next_picture.f->data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;

  711.             srcV = s->next_picture.f->data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;

  712.             lutuv  = v->next_lutuv;

  713.             use_ic = v->next_use_ic;

  714.         } else {

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

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

  717.             lutuv  = v->last_lutuv;

  718.             use_ic = v->last_use_ic;

  719.         }

  720.         uvmx_field[i] = (uvmx_field[i] & 3) << 1;

  721.         uvmy_field[i] = (uvmy_field[i] & 3) << 1;

  722. 

  723.         if (fieldmv && !(uvsrc_y & 1))

  724.             v_edge_pos--;

  725.         if (fieldmv && (uvsrc_y & 1) && uvsrc_y < 2)

  726.             uvsrc_y--;

  727.         if (use_ic

  728.             || s->h_edge_pos < 10 || v_edge_pos < (5 << fieldmv)

  729.             || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 5

  730.             || (unsigned)uvsrc_y > v_edge_pos - (5 << fieldmv)) {

  731.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcU,

  732.                                      s->uvlinesize, s->uvlinesize,

  733.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,

  734.                                      s->h_edge_pos >> 1, v_edge_pos);

  735.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV,

  736.                                      s->uvlinesize, s->uvlinesize,

  737.                                      5, (5 << fieldmv), uvsrc_x, uvsrc_y,

  738.                                      s->h_edge_pos >> 1, v_edge_pos);

  739.             srcU = s->edge_emu_buffer;

  740.             srcV = s->edge_emu_buffer + 16;

  741. 

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

  743.             if (use_ic) {

  744.                 int i, j;

  745.                 uint8_t *src, *src2;

  746. 

  747.                 src  = srcU;

  748.                 src2 = srcV;

  749.                 for (j = 0; j < 5; j++) {

  750.                     int f = (uvsrc_y + (j << fieldmv)) & 1;

  751.                     for (i = 0; i < 5; i++) {

  752.                         src[i]  = lutuv[f][src[i]];

  753.                         src2[i] = lutuv[f][src2[i]];

  754.                     }

  755.                     src  += s->uvlinesize << fieldmv;

  756.                     src2 += s->uvlinesize << fieldmv;

  757.                 }

  758.             }

  759.         }

  760.         if (avg) {

  761.             if (!v->rnd) {

  762.                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  763.                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  764.             } else {

  765.                 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]);

  766.                 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]);

  767.             }

  768.         } else {

  769.             if (!v->rnd) {

  770.                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  771.                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);

  772.             } else {

  773.                 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]);

  774.                 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]);

  775.             }

  776.         }

  777.     }

  778. }

  779. 

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

  781.  */

  782. void ff_vc1_interp_mc(VC1Context *v)

  783. {

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

  785.     H264ChromaContext *h264chroma = &v->h264chroma;

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

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

  788.     int off, off_uv;

  789.     int v_edge_pos = s->v_edge_pos >> v->field_mode;

  790.     int use_ic = v->next_use_ic;

  791. 

  792.     if (!v->field_mode && !v->s.next_picture.f->data[0])

  793.         return;

  794. 

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

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

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

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

  799.     if (v->field_mode && v->cur_field_type != v->ref_field_type[1]) {

  800.         my   = my   - 2 + 4 * v->cur_field_type;

  801.         uvmy = uvmy - 2 + 4 * v->cur_field_type;

  802.     }

  803.     if (v->fastuvmc) {

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

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

  806.     }

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

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

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

  810. 

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

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

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

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

  815. 

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

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

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

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

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

  821.     } else {

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

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

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

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

  826.     }

  827. 

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

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

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

  831. 

  832.     if (v->field_mode && v->ref_field_type[1]) {

  833.         srcY += s->current_picture_ptr->f->linesize[0];

  834.         srcU += s->current_picture_ptr->f->linesize[1];

  835.         srcV += s->current_picture_ptr->f->linesize[2];

  836.     }

  837. 

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

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

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

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

  842.     }

  843. 

  844.     if (v->rangeredfrm || s->h_edge_pos < 22 || v_edge_pos < 22 || use_ic

  845.         || (unsigned)(src_x - 1) > s->h_edge_pos - (mx & 3) - 16 - 3

  846.         || (unsigned)(src_y - 1) > v_edge_pos    - (my & 3) - 16 - 3) {

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

  848. 

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

  850.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,

  851.                                  s->linesize, s->linesize,

  852.                                  17 + s->mspel * 2, 17 + s->mspel * 2,

  853.                                  src_x - s->mspel, src_y - s->mspel,

  854.                                  s->h_edge_pos, v_edge_pos);

  855.         srcY = s->edge_emu_buffer;

  856.         s->vdsp.emulated_edge_mc(uvbuf, srcU,

  857.                                  s->uvlinesize, s->uvlinesize,

  858.                                  8 + 1, 8 + 1,

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

  860.         s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,

  861.                                  s->uvlinesize, s->uvlinesize,

  862.                                  8 + 1, 8 + 1,

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

  864.         srcU = uvbuf;

  865.         srcV = uvbuf + 16;

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

  867.         if (v->rangeredfrm) {

  868.             int i, j;

  869.             uint8_t *src, *src2;

  870. 

  871.             src = srcY;

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

  873.                 for (i = 0; i < 17 + s->mspel * 2; i++)

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

  875.                 src += s->linesize;

  876.             }

  877.             src = srcU;

  878.             src2 = srcV;

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

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

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

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

  883.                 }

  884.                 src  += s->uvlinesize;

  885.                 src2 += s->uvlinesize;

  886.             }

  887.         }

  888. 

  889.         if (use_ic) {

  890.             uint8_t (*luty )[256] = v->next_luty;

  891.             uint8_t (*lutuv)[256] = v->next_lutuv;

  892.             int i, j;

  893.             uint8_t *src, *src2;

  894. 

  895.             src = srcY;

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

  897.                 int f = v->field_mode ? v->ref_field_type[1] : ((j+src_y - s->mspel) & 1);

  898.                 for (i = 0; i < 17 + s->mspel * 2; i++)

  899.                     src[i] = luty[f][src[i]];

  900.                 src += s->linesize;

  901.             }

  902.             src  = srcU;

  903.             src2 = srcV;

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

  905.                 int f = v->field_mode ? v->ref_field_type[1] : ((j+uvsrc_y) & 1);

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

  907.                     src[i]  = lutuv[f][src[i]];

  908.                     src2[i] = lutuv[f][src2[i]];

  909.                 }

  910.                 src  += s->uvlinesize;

  911.                 src2 += s->uvlinesize;

  912.             }

  913.         }

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

  915.     }

  916. 

  917.     off    = 0;

  918.     off_uv = 0;

  919. 

  920.     if (s->mspel) {

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

  922.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off    , srcY    , s->linesize, v->rnd);

  923.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8, srcY + 8, s->linesize, v->rnd);

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

  925.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  926.         v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  927.     } else { // hpel mc

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

  929. 

  930.         if (!v->rnd)

  931.             s->hdsp.avg_pixels_tab[0][dxy](s->dest[0] + off, srcY, s->linesize, 16);

  932.         else

  933.             s->hdsp.avg_no_rnd_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, 16);

  934.     }

  935. 

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

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

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

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

  940.     if (!v->rnd) {

  941.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  942.         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  943.     } else {

  944.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);

  945.         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);

  946.     }

  947. }