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FFmpeg/libavcodec/mpegvideo_motion.c

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  1. /*

  2.  * Copyright (c) 2000,2001 Fabrice Bellard

  3.  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>

  4.  *

  5.  * 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>

  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. #include <string.h>

  25. 

  26. #include "libavutil/avassert.h"

  27. #include "libavutil/internal.h"

  28. #include "libavutil/mem_internal.h"

  29. 

  30. #include "avcodec.h"

  31. #include "h261.h"

  32. #include "mpegutils.h"

  33. #include "mpegvideo.h"

  34. #include "mjpegenc.h"

  35. #include "msmpeg4.h"

  36. #include "qpeldsp.h"

  37. #include "wmv2.h"

  38. #include <limits.h>

  39. 

  40. static void gmc1_motion(MpegEncContext *s,

  41.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  42.                         uint8_t **ref_picture)

  43. {

  44.     uint8_t *ptr;

  45.     int src_x, src_y, motion_x, motion_y;

  46.     ptrdiff_t offset, linesize, uvlinesize;

  47.     int emu = 0;

  48. 

  49.     motion_x   = s->sprite_offset[0][0];

  50.     motion_y   = s->sprite_offset[0][1];

  51.     src_x      = s->mb_x * 16 + (motion_x >> (s->sprite_warping_accuracy + 1));

  52.     src_y      = s->mb_y * 16 + (motion_y >> (s->sprite_warping_accuracy + 1));

  53.     motion_x *= 1 << (3 - s->sprite_warping_accuracy);

  54.     motion_y *= 1 << (3 - s->sprite_warping_accuracy);

  55.     src_x      = av_clip(src_x, -16, s->width);

  56.     if (src_x == s->width)

  57.         motion_x = 0;

  58.     src_y = av_clip(src_y, -16, s->height);

  59.     if (src_y == s->height)

  60.         motion_y = 0;

  61. 

  62.     linesize   = s->linesize;

  63.     uvlinesize = s->uvlinesize;

  64. 

  65.     ptr = ref_picture[0] + src_y * linesize + src_x;

  66. 

  67.     if ((unsigned)src_x >= FFMAX(s->h_edge_pos - 17, 0) ||

  68.         (unsigned)src_y >= FFMAX(s->v_edge_pos - 17, 0)) {

  69.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,

  70.                                  linesize, linesize,

  71.                                  17, 17,

  72.                                  src_x, src_y,

  73.                                  s->h_edge_pos, s->v_edge_pos);

  74.         ptr = s->sc.edge_emu_buffer;

  75.     }

  76. 

  77.     if ((motion_x | motion_y) & 7) {

  78.         s->mdsp.gmc1(dest_y, ptr, linesize, 16,

  79.                      motion_x & 15, motion_y & 15, 128 - s->no_rounding);

  80.         s->mdsp.gmc1(dest_y + 8, ptr + 8, linesize, 16,

  81.                      motion_x & 15, motion_y & 15, 128 - s->no_rounding);

  82.     } else {

  83.         int dxy;

  84. 

  85.         dxy = ((motion_x >> 3) & 1) | ((motion_y >> 2) & 2);

  86.         if (s->no_rounding) {

  87.             s->hdsp.put_no_rnd_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);

  88.         } else {

  89.             s->hdsp.put_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);

  90.         }

  91.     }

  92. 

  93.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)

  94.         return;

  95. 

  96.     motion_x   = s->sprite_offset[1][0];

  97.     motion_y   = s->sprite_offset[1][1];

  98.     src_x      = s->mb_x * 8 + (motion_x >> (s->sprite_warping_accuracy + 1));

  99.     src_y      = s->mb_y * 8 + (motion_y >> (s->sprite_warping_accuracy + 1));

  100.     motion_x  *= 1 << (3 - s->sprite_warping_accuracy);

  101.     motion_y  *= 1 << (3 - s->sprite_warping_accuracy);

  102.     src_x      = av_clip(src_x, -8, s->width >> 1);

  103.     if (src_x == s->width >> 1)

  104.         motion_x = 0;

  105.     src_y = av_clip(src_y, -8, s->height >> 1);

  106.     if (src_y == s->height >> 1)

  107.         motion_y = 0;

  108. 

  109.     offset = (src_y * uvlinesize) + src_x;

  110.     ptr    = ref_picture[1] + offset;

  111.     if ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - 9, 0) ||

  112.         (unsigned)src_y >= FFMAX((s->v_edge_pos >> 1) - 9, 0)) {

  113.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,

  114.                                  uvlinesize, uvlinesize,

  115.                                  9, 9,

  116.                                  src_x, src_y,

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

  118.         ptr = s->sc.edge_emu_buffer;

  119.         emu = 1;

  120.     }

  121.     s->mdsp.gmc1(dest_cb, ptr, uvlinesize, 8,

  122.                  motion_x & 15, motion_y & 15, 128 - s->no_rounding);

  123. 

  124.     ptr = ref_picture[2] + offset;

  125.     if (emu) {

  126.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,

  127.                                  uvlinesize, uvlinesize,

  128.                                  9, 9,

  129.                                  src_x, src_y,

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

  131.         ptr = s->sc.edge_emu_buffer;

  132.     }

  133.     s->mdsp.gmc1(dest_cr, ptr, uvlinesize, 8,

  134.                  motion_x & 15, motion_y & 15, 128 - s->no_rounding);

  135. }

  136. 

  137. static void gmc_motion(MpegEncContext *s,

  138.                        uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  139.                        uint8_t **ref_picture)

  140. {

  141.     uint8_t *ptr;

  142.     int linesize, uvlinesize;

  143.     const int a = s->sprite_warping_accuracy;

  144.     int ox, oy;

  145. 

  146.     linesize   = s->linesize;

  147.     uvlinesize = s->uvlinesize;

  148. 

  149.     ptr = ref_picture[0];

  150. 

  151.     ox = s->sprite_offset[0][0] + s->sprite_delta[0][0] * s->mb_x * 16 +

  152.          s->sprite_delta[0][1] * s->mb_y * 16;

  153.     oy = s->sprite_offset[0][1] + s->sprite_delta[1][0] * s->mb_x * 16 +

  154.          s->sprite_delta[1][1] * s->mb_y * 16;

  155. 

  156.     s->mdsp.gmc(dest_y, ptr, linesize, 16,

  157.                 ox, oy,

  158.                 s->sprite_delta[0][0], s->sprite_delta[0][1],

  159.                 s->sprite_delta[1][0], s->sprite_delta[1][1],

  160.                 a + 1, (1 << (2 * a + 1)) - s->no_rounding,

  161.                 s->h_edge_pos, s->v_edge_pos);

  162.     s->mdsp.gmc(dest_y + 8, ptr, linesize, 16,

  163.                 ox + s->sprite_delta[0][0] * 8,

  164.                 oy + s->sprite_delta[1][0] * 8,

  165.                 s->sprite_delta[0][0], s->sprite_delta[0][1],

  166.                 s->sprite_delta[1][0], s->sprite_delta[1][1],

  167.                 a + 1, (1 << (2 * a + 1)) - s->no_rounding,

  168.                 s->h_edge_pos, s->v_edge_pos);

  169. 

  170.     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)

  171.         return;

  172. 

  173.     ox = s->sprite_offset[1][0] + s->sprite_delta[0][0] * s->mb_x * 8 +

  174.          s->sprite_delta[0][1] * s->mb_y * 8;

  175.     oy = s->sprite_offset[1][1] + s->sprite_delta[1][0] * s->mb_x * 8 +

  176.          s->sprite_delta[1][1] * s->mb_y * 8;

  177. 

  178.     ptr = ref_picture[1];

  179.     s->mdsp.gmc(dest_cb, ptr, uvlinesize, 8,

  180.                 ox, oy,

  181.                 s->sprite_delta[0][0], s->sprite_delta[0][1],

  182.                 s->sprite_delta[1][0], s->sprite_delta[1][1],

  183.                 a + 1, (1 << (2 * a + 1)) - s->no_rounding,

  184.                 (s->h_edge_pos + 1) >> 1, (s->v_edge_pos + 1) >> 1);

  185. 

  186.     ptr = ref_picture[2];

  187.     s->mdsp.gmc(dest_cr, ptr, uvlinesize, 8,

  188.                 ox, oy,

  189.                 s->sprite_delta[0][0], s->sprite_delta[0][1],

  190.                 s->sprite_delta[1][0], s->sprite_delta[1][1],

  191.                 a + 1, (1 << (2 * a + 1)) - s->no_rounding,

  192.                 (s->h_edge_pos + 1) >> 1, (s->v_edge_pos + 1) >> 1);

  193. }

  194. 

  195. static inline int hpel_motion(MpegEncContext *s,

  196.                               uint8_t *dest, uint8_t *src,

  197.                               int src_x, int src_y,

  198.                               op_pixels_func *pix_op,

  199.                               int motion_x, int motion_y)

  200. {

  201.     int dxy = 0;

  202.     int emu = 0;

  203. 

  204.     src_x += motion_x >> 1;

  205.     src_y += motion_y >> 1;

  206. 

  207.     /* WARNING: do no forget half pels */

  208.     src_x = av_clip(src_x, -16, s->width); // FIXME unneeded for emu?

  209.     if (src_x != s->width)

  210.         dxy |= motion_x & 1;

  211.     src_y = av_clip(src_y, -16, s->height);

  212.     if (src_y != s->height)

  213.         dxy |= (motion_y & 1) << 1;

  214.     src += src_y * s->linesize + src_x;

  215. 

  216.         if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 1) - 7, 0) ||

  217.             (unsigned)src_y >= FFMAX(s->v_edge_pos - (motion_y & 1) - 7, 0)) {

  218.             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src,

  219.                                      s->linesize, s->linesize,

  220.                                      9, 9,

  221.                                      src_x, src_y,

  222.                                      s->h_edge_pos, s->v_edge_pos);

  223.             src = s->sc.edge_emu_buffer;

  224.             emu = 1;

  225.         }

  226.     pix_op[dxy](dest, src, s->linesize, 8);

  227.     return emu;

  228. }

  229. 

  230. static av_always_inline

  231. void mpeg_motion_internal(MpegEncContext *s,

  232.                           uint8_t *dest_y,

  233.                           uint8_t *dest_cb,

  234.                           uint8_t *dest_cr,

  235.                           int field_based,

  236.                           int bottom_field,

  237.                           int field_select,

  238.                           uint8_t **ref_picture,

  239.                           op_pixels_func (*pix_op)[4],

  240.                           int motion_x,

  241.                           int motion_y,

  242.                           int h,

  243.                           int is_mpeg12,

  244.                           int is_16x8,

  245.                           int mb_y)

  246. {

  247.     uint8_t *ptr_y, *ptr_cb, *ptr_cr;

  248.     int dxy, uvdxy, mx, my, src_x, src_y,

  249.         uvsrc_x, uvsrc_y, v_edge_pos, block_y_half;

  250.     ptrdiff_t uvlinesize, linesize;

  251. 

  252.     v_edge_pos = s->v_edge_pos >> field_based;

  253.     linesize   = s->current_picture.f->linesize[0] << field_based;

  254.     uvlinesize = s->current_picture.f->linesize[1] << field_based;

  255.     block_y_half = (field_based | is_16x8);

  256. 

  257.     dxy   = ((motion_y & 1) << 1) | (motion_x & 1);

  258.     src_x = s->mb_x * 16 + (motion_x >> 1);

  259.     src_y = (mb_y << (4 - block_y_half)) + (motion_y >> 1);

  260. 

  261.     if (!is_mpeg12 && s->out_format == FMT_H263) {

  262.         if ((s->workaround_bugs & FF_BUG_HPEL_CHROMA) && field_based) {

  263.             mx      = (motion_x >> 1) | (motion_x & 1);

  264.             my      = motion_y >> 1;

  265.             uvdxy   = ((my & 1) << 1) | (mx & 1);

  266.             uvsrc_x = s->mb_x * 8 + (mx >> 1);

  267.             uvsrc_y = (mb_y << (3 - block_y_half)) + (my >> 1);

  268.         } else {

  269.             uvdxy   = dxy | (motion_y & 2) | ((motion_x & 2) >> 1);

  270.             uvsrc_x = src_x >> 1;

  271.             uvsrc_y = src_y >> 1;

  272.         }

  273.     // Even chroma mv's are full pel in H261

  274.     } else if (!is_mpeg12 && s->out_format == FMT_H261) {

  275.         mx      = motion_x / 4;

  276.         my      = motion_y / 4;

  277.         uvdxy   = 0;

  278.         uvsrc_x = s->mb_x * 8 + mx;

  279.         uvsrc_y = mb_y * 8 + my;

  280.     } else {

  281.         if (s->chroma_y_shift) {

  282.             mx      = motion_x / 2;

  283.             my      = motion_y / 2;

  284.             uvdxy   = ((my & 1) << 1) | (mx & 1);

  285.             uvsrc_x = s->mb_x * 8 + (mx >> 1);

  286.             uvsrc_y = (mb_y << (3 - block_y_half)) + (my >> 1);

  287.         } else {

  288.             if (s->chroma_x_shift) {

  289.                 // Chroma422

  290.                 mx      = motion_x / 2;

  291.                 uvdxy   = ((motion_y & 1) << 1) | (mx & 1);

  292.                 uvsrc_x = s->mb_x * 8 + (mx >> 1);

  293.                 uvsrc_y = src_y;

  294.             } else {

  295.                 // Chroma444

  296.                 uvdxy   = dxy;

  297.                 uvsrc_x = src_x;

  298.                 uvsrc_y = src_y;

  299.             }

  300.         }

  301.     }

  302. 

  303.     ptr_y  = ref_picture[0] + src_y * linesize + src_x;

  304.     ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;

  305.     ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;

  306. 

  307.     if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 1) - 15   , 0) ||

  308.         (unsigned)src_y >= FFMAX(   v_edge_pos - (motion_y & 1) - h + 1, 0)) {

  309.         if (is_mpeg12 ||

  310.             s->codec_id == AV_CODEC_ID_MPEG2VIDEO ||

  311.             s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {

  312.             av_log(s->avctx, AV_LOG_DEBUG,

  313.                    "MPEG motion vector out of boundary (%d %d)\n", src_x,

  314.                    src_y);

  315.             return;

  316.         }

  317.         src_y = (unsigned)src_y << field_based;

  318.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,

  319.                                  s->linesize, s->linesize,

  320.                                  17, 17 + field_based,

  321.                                  src_x, src_y,

  322.                                  s->h_edge_pos, s->v_edge_pos);

  323.         ptr_y = s->sc.edge_emu_buffer;

  324.         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {

  325.             uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;

  326.             uint8_t *vbuf = ubuf + 10 * s->uvlinesize;

  327.             if (s->workaround_bugs & FF_BUG_IEDGE)

  328.                 vbuf -= s->uvlinesize;

  329.             uvsrc_y = (unsigned)uvsrc_y << field_based;

  330.             s->vdsp.emulated_edge_mc(ubuf, ptr_cb,

  331.                                      s->uvlinesize, s->uvlinesize,

  332.                                      9, 9 + field_based,

  333.                                      uvsrc_x, uvsrc_y,

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

  335.             s->vdsp.emulated_edge_mc(vbuf, ptr_cr,

  336.                                      s->uvlinesize, s->uvlinesize,

  337.                                      9, 9 + field_based,

  338.                                      uvsrc_x, uvsrc_y,

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

  340.             ptr_cb = ubuf;

  341.             ptr_cr = vbuf;

  342.         }

  343.     }

  344. 

  345.     /* FIXME use this for field pix too instead of the obnoxious hack which

  346.      * changes picture.data */

  347.     if (bottom_field) {

  348.         dest_y  += s->linesize;

  349.         dest_cb += s->uvlinesize;

  350.         dest_cr += s->uvlinesize;

  351.     }

  352. 

  353.     if (field_select) {

  354.         ptr_y  += s->linesize;

  355.         ptr_cb += s->uvlinesize;

  356.         ptr_cr += s->uvlinesize;

  357.     }

  358. 

  359.     pix_op[0][dxy](dest_y, ptr_y, linesize, h);

  360. 

  361.     if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {

  362.         pix_op[s->chroma_x_shift][uvdxy]

  363.             (dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);

  364.         pix_op[s->chroma_x_shift][uvdxy]

  365.             (dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift);

  366.     }

  367.     if (!is_mpeg12 && (CONFIG_H261_ENCODER || CONFIG_H261_DECODER) &&

  368.         s->out_format == FMT_H261) {

  369.         ff_h261_loop_filter(s);

  370.     }

  371. }

  372. /* apply one mpeg motion vector to the three components */

  373. static void mpeg_motion(MpegEncContext *s,

  374.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  375.                         int field_select, uint8_t **ref_picture,

  376.                         op_pixels_func (*pix_op)[4],

  377.                         int motion_x, int motion_y, int h, int is_16x8, int mb_y)

  378. {

  379. #if !CONFIG_SMALL

  380.     if (s->out_format == FMT_MPEG1)

  381.         mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 0, 0,

  382.                              field_select, ref_picture, pix_op,

  383.                              motion_x, motion_y, h, 1, is_16x8, mb_y);

  384.     else

  385. #endif

  386.         mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 0, 0,

  387.                              field_select, ref_picture, pix_op,

  388.                              motion_x, motion_y, h, 0, is_16x8, mb_y);

  389. }

  390. 

  391. static void mpeg_motion_field(MpegEncContext *s, uint8_t *dest_y,

  392.                               uint8_t *dest_cb, uint8_t *dest_cr,

  393.                               int bottom_field, int field_select,

  394.                               uint8_t **ref_picture,

  395.                               op_pixels_func (*pix_op)[4],

  396.                               int motion_x, int motion_y, int h, int mb_y)

  397. {

  398. #if !CONFIG_SMALL

  399.     if (s->out_format == FMT_MPEG1)

  400.         mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 1,

  401.                              bottom_field, field_select, ref_picture, pix_op,

  402.                              motion_x, motion_y, h, 1, 0, mb_y);

  403.     else

  404. #endif

  405.         mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 1,

  406.                              bottom_field, field_select, ref_picture, pix_op,

  407.                              motion_x, motion_y, h, 0, 0, mb_y);

  408. }

  409. 

  410. // FIXME: SIMDify, avg variant, 16x16 version

  411. static inline void put_obmc(uint8_t *dst, uint8_t *src[5], int stride)

  412. {

  413.     int x;

  414.     uint8_t *const top    = src[1];

  415.     uint8_t *const left   = src[2];

  416.     uint8_t *const mid    = src[0];

  417.     uint8_t *const right  = src[3];

  418.     uint8_t *const bottom = src[4];

  419. #define OBMC_FILTER(x, t, l, m, r, b)\

  420.     dst[x]= (t*top[x] + l*left[x] + m*mid[x] + r*right[x] + b*bottom[x] + 4)>>3

  421. #define OBMC_FILTER4(x, t, l, m, r, b)\

  422.     OBMC_FILTER(x         , t, l, m, r, b);\

  423.     OBMC_FILTER(x+1       , t, l, m, r, b);\

  424.     OBMC_FILTER(x  +stride, t, l, m, r, b);\

  425.     OBMC_FILTER(x+1+stride, t, l, m, r, b);

  426. 

  427.     x = 0;

  428.     OBMC_FILTER (x    , 2, 2, 4, 0, 0);

  429.     OBMC_FILTER (x + 1, 2, 1, 5, 0, 0);

  430.     OBMC_FILTER4(x + 2, 2, 1, 5, 0, 0);

  431.     OBMC_FILTER4(x + 4, 2, 0, 5, 1, 0);

  432.     OBMC_FILTER (x + 6, 2, 0, 5, 1, 0);

  433.     OBMC_FILTER (x + 7, 2, 0, 4, 2, 0);

  434.     x += stride;

  435.     OBMC_FILTER (x    , 1, 2, 5, 0, 0);

  436.     OBMC_FILTER (x + 1, 1, 2, 5, 0, 0);

  437.     OBMC_FILTER (x + 6, 1, 0, 5, 2, 0);

  438.     OBMC_FILTER (x + 7, 1, 0, 5, 2, 0);

  439.     x += stride;

  440.     OBMC_FILTER4(x    , 1, 2, 5, 0, 0);

  441.     OBMC_FILTER4(x + 2, 1, 1, 6, 0, 0);

  442.     OBMC_FILTER4(x + 4, 1, 0, 6, 1, 0);

  443.     OBMC_FILTER4(x + 6, 1, 0, 5, 2, 0);

  444.     x += 2 * stride;

  445.     OBMC_FILTER4(x    , 0, 2, 5, 0, 1);

  446.     OBMC_FILTER4(x + 2, 0, 1, 6, 0, 1);

  447.     OBMC_FILTER4(x + 4, 0, 0, 6, 1, 1);

  448.     OBMC_FILTER4(x + 6, 0, 0, 5, 2, 1);

  449.     x += 2*stride;

  450.     OBMC_FILTER (x    , 0, 2, 5, 0, 1);

  451.     OBMC_FILTER (x + 1, 0, 2, 5, 0, 1);

  452.     OBMC_FILTER4(x + 2, 0, 1, 5, 0, 2);

  453.     OBMC_FILTER4(x + 4, 0, 0, 5, 1, 2);

  454.     OBMC_FILTER (x + 6, 0, 0, 5, 2, 1);

  455.     OBMC_FILTER (x + 7, 0, 0, 5, 2, 1);

  456.     x += stride;

  457.     OBMC_FILTER (x    , 0, 2, 4, 0, 2);

  458.     OBMC_FILTER (x + 1, 0, 1, 5, 0, 2);

  459.     OBMC_FILTER (x + 6, 0, 0, 5, 1, 2);

  460.     OBMC_FILTER (x + 7, 0, 0, 4, 2, 2);

  461. }

  462. 

  463. /* obmc for 1 8x8 luma block */

  464. static inline void obmc_motion(MpegEncContext *s,

  465.                                uint8_t *dest, uint8_t *src,

  466.                                int src_x, int src_y,

  467.                                op_pixels_func *pix_op,

  468.                                int16_t mv[5][2] /* mid top left right bottom */)

  469. #define MID    0

  470. {

  471.     int i;

  472.     uint8_t *ptr[5];

  473. 

  474.     av_assert2(s->quarter_sample == 0);

  475. 

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

  477.         if (i && mv[i][0] == mv[MID][0] && mv[i][1] == mv[MID][1]) {

  478.             ptr[i] = ptr[MID];

  479.         } else {

  480.             ptr[i] = s->sc.obmc_scratchpad + 8 * (i & 1) +

  481.                      s->linesize * 8 * (i >> 1);

  482.             hpel_motion(s, ptr[i], src, src_x, src_y, pix_op,

  483.                         mv[i][0], mv[i][1]);

  484.         }

  485.     }

  486. 

  487.     put_obmc(dest, ptr, s->linesize);

  488. }

  489. 

  490. static inline void qpel_motion(MpegEncContext *s,

  491.                                uint8_t *dest_y,

  492.                                uint8_t *dest_cb,

  493.                                uint8_t *dest_cr,

  494.                                int field_based, int bottom_field,

  495.                                int field_select, uint8_t **ref_picture,

  496.                                op_pixels_func (*pix_op)[4],

  497.                                qpel_mc_func (*qpix_op)[16],

  498.                                int motion_x, int motion_y, int h)

  499. {

  500.     uint8_t *ptr_y, *ptr_cb, *ptr_cr;

  501.     int dxy, uvdxy, mx, my, src_x, src_y, uvsrc_x, uvsrc_y, v_edge_pos;

  502.     ptrdiff_t linesize, uvlinesize;

  503. 

  504.     dxy   = ((motion_y & 3) << 2) | (motion_x & 3);

  505. 

  506.     src_x = s->mb_x *  16                 + (motion_x >> 2);

  507.     src_y = s->mb_y * (16 >> field_based) + (motion_y >> 2);

  508. 

  509.     v_edge_pos = s->v_edge_pos >> field_based;

  510.     linesize   = s->linesize   << field_based;

  511.     uvlinesize = s->uvlinesize << field_based;

  512. 

  513.     if (field_based) {

  514.         mx = motion_x / 2;

  515.         my = motion_y >> 1;

  516.     } else if (s->workaround_bugs & FF_BUG_QPEL_CHROMA2) {

  517.         static const int rtab[8] = { 0, 0, 1, 1, 0, 0, 0, 1 };

  518.         mx = (motion_x >> 1) + rtab[motion_x & 7];

  519.         my = (motion_y >> 1) + rtab[motion_y & 7];

  520.     } else if (s->workaround_bugs & FF_BUG_QPEL_CHROMA) {

  521.         mx = (motion_x >> 1) | (motion_x & 1);

  522.         my = (motion_y >> 1) | (motion_y & 1);

  523.     } else {

  524.         mx = motion_x / 2;

  525.         my = motion_y / 2;

  526.     }

  527.     mx = (mx >> 1) | (mx & 1);

  528.     my = (my >> 1) | (my & 1);

  529. 

  530.     uvdxy = (mx & 1) | ((my & 1) << 1);

  531.     mx  >>= 1;

  532.     my  >>= 1;

  533. 

  534.     uvsrc_x = s->mb_x *  8                 + mx;

  535.     uvsrc_y = s->mb_y * (8 >> field_based) + my;

  536. 

  537.     ptr_y  = ref_picture[0] + src_y   * linesize   + src_x;

  538.     ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;

  539.     ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;

  540. 

  541.     if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 3) - 15   , 0) ||

  542.         (unsigned)src_y >= FFMAX(   v_edge_pos - (motion_y & 3) - h + 1, 0)) {

  543.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,

  544.                                  s->linesize, s->linesize,

  545.                                  17, 17 + field_based,

  546.                                  src_x, src_y * (1 << field_based),

  547.                                  s->h_edge_pos, s->v_edge_pos);

  548.         ptr_y = s->sc.edge_emu_buffer;

  549.         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {

  550.             uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;

  551.             uint8_t *vbuf = ubuf + 10 * s->uvlinesize;

  552.             if (s->workaround_bugs & FF_BUG_IEDGE)

  553.                 vbuf -= s->uvlinesize;

  554.             s->vdsp.emulated_edge_mc(ubuf, ptr_cb,

  555.                                      s->uvlinesize, s->uvlinesize,

  556.                                      9, 9 + field_based,

  557.                                      uvsrc_x, uvsrc_y * (1 << field_based),

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

  559.             s->vdsp.emulated_edge_mc(vbuf, ptr_cr,

  560.                                      s->uvlinesize, s->uvlinesize,

  561.                                      9, 9 + field_based,

  562.                                      uvsrc_x, uvsrc_y * (1 << field_based),

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

  564.             ptr_cb = ubuf;

  565.             ptr_cr = vbuf;

  566.         }

  567.     }

  568. 

  569.     if (!field_based)

  570.         qpix_op[0][dxy](dest_y, ptr_y, linesize);

  571.     else {

  572.         if (bottom_field) {

  573.             dest_y  += s->linesize;

  574.             dest_cb += s->uvlinesize;

  575.             dest_cr += s->uvlinesize;

  576.         }

  577. 

  578.         if (field_select) {

  579.             ptr_y  += s->linesize;

  580.             ptr_cb += s->uvlinesize;

  581.             ptr_cr += s->uvlinesize;

  582.         }

  583.         // damn interlaced mode

  584.         // FIXME boundary mirroring is not exactly correct here

  585.         qpix_op[1][dxy](dest_y, ptr_y, linesize);

  586.         qpix_op[1][dxy](dest_y + 8, ptr_y + 8, linesize);

  587.     }

  588.     if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {

  589.         pix_op[1][uvdxy](dest_cr, ptr_cr, uvlinesize, h >> 1);

  590.         pix_op[1][uvdxy](dest_cb, ptr_cb, uvlinesize, h >> 1);

  591.     }

  592. }

  593. 

  594. /**

  595.  * H.263 chroma 4mv motion compensation.

  596.  */

  597. static void chroma_4mv_motion(MpegEncContext *s,

  598.                               uint8_t *dest_cb, uint8_t *dest_cr,

  599.                               uint8_t **ref_picture,

  600.                               op_pixels_func *pix_op,

  601.                               int mx, int my)

  602. {

  603.     uint8_t *ptr;

  604.     int src_x, src_y, dxy, emu = 0;

  605.     ptrdiff_t offset;

  606. 

  607.     /* In case of 8X8, we construct a single chroma motion vector

  608.      * with a special rounding */

  609.     mx = ff_h263_round_chroma(mx);

  610.     my = ff_h263_round_chroma(my);

  611. 

  612.     dxy  = ((my & 1) << 1) | (mx & 1);

  613.     mx >>= 1;

  614.     my >>= 1;

  615. 

  616.     src_x = s->mb_x * 8 + mx;

  617.     src_y = s->mb_y * 8 + my;

  618.     src_x = av_clip(src_x, -8, (s->width >> 1));

  619.     if (src_x == (s->width >> 1))

  620.         dxy &= ~1;

  621.     src_y = av_clip(src_y, -8, (s->height >> 1));

  622.     if (src_y == (s->height >> 1))

  623.         dxy &= ~2;

  624. 

  625.     offset = src_y * s->uvlinesize + src_x;

  626.     ptr    = ref_picture[1] + offset;

  627.     if ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - (dxy  & 1) - 7, 0) ||

  628.         (unsigned)src_y >= FFMAX((s->v_edge_pos >> 1) - (dxy >> 1) - 7, 0)) {

  629.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,

  630.                                  s->uvlinesize, s->uvlinesize,

  631.                                  9, 9, src_x, src_y,

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

  633.         ptr = s->sc.edge_emu_buffer;

  634.         emu = 1;

  635.     }

  636.     pix_op[dxy](dest_cb, ptr, s->uvlinesize, 8);

  637. 

  638.     ptr = ref_picture[2] + offset;

  639.     if (emu) {

  640.         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,

  641.                                  s->uvlinesize, s->uvlinesize,

  642.                                  9, 9, src_x, src_y,

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

  644.         ptr = s->sc.edge_emu_buffer;

  645.     }

  646.     pix_op[dxy](dest_cr, ptr, s->uvlinesize, 8);

  647. }

  648. 

  649. static inline void prefetch_motion(MpegEncContext *s, uint8_t **pix, int dir)

  650. {

  651.     /* fetch pixels for estimated mv 4 macroblocks ahead

  652.      * optimized for 64byte cache lines */

  653.     const int shift = s->quarter_sample ? 2 : 1;

  654.     const int mx    = (s->mv[dir][0][0] >> shift) + 16 * s->mb_x + 8;

  655.     const int my    = (s->mv[dir][0][1] >> shift) + 16 * s->mb_y;

  656.     int off         = mx + (my + (s->mb_x & 3) * 4) * s->linesize + 64;

  657. 

  658.     s->vdsp.prefetch(pix[0] + off, s->linesize, 4);

  659.     off = (mx >> 1) + ((my >> 1) + (s->mb_x & 7)) * s->uvlinesize + 64;

  660.     s->vdsp.prefetch(pix[1] + off, pix[2] - pix[1], 2);

  661. }

  662. 

  663. static inline void apply_obmc(MpegEncContext *s,

  664.                               uint8_t *dest_y,

  665.                               uint8_t *dest_cb,

  666.                               uint8_t *dest_cr,

  667.                               uint8_t **ref_picture,

  668.                               op_pixels_func (*pix_op)[4])

  669. {

  670.     LOCAL_ALIGNED_8(int16_t, mv_cache, [4], [4][2]);

  671.     Picture *cur_frame   = &s->current_picture;

  672.     int mb_x = s->mb_x;

  673.     int mb_y = s->mb_y;

  674.     const int xy         = mb_x + mb_y * s->mb_stride;

  675.     const int mot_stride = s->b8_stride;

  676.     const int mot_xy     = mb_x * 2 + mb_y * 2 * mot_stride;

  677.     int mx, my, i;

  678. 

  679.     av_assert2(!s->mb_skipped);

  680. 

  681.     AV_COPY32(mv_cache[1][1], cur_frame->motion_val[0][mot_xy]);

  682.     AV_COPY32(mv_cache[1][2], cur_frame->motion_val[0][mot_xy + 1]);

  683. 

  684.     AV_COPY32(mv_cache[2][1],

  685.               cur_frame->motion_val[0][mot_xy + mot_stride]);

  686.     AV_COPY32(mv_cache[2][2],

  687.               cur_frame->motion_val[0][mot_xy + mot_stride + 1]);

  688. 

  689.     AV_COPY32(mv_cache[3][1],

  690.               cur_frame->motion_val[0][mot_xy + mot_stride]);

  691.     AV_COPY32(mv_cache[3][2],

  692.               cur_frame->motion_val[0][mot_xy + mot_stride + 1]);

  693. 

  694.     if (mb_y == 0 || IS_INTRA(cur_frame->mb_type[xy - s->mb_stride])) {

  695.         AV_COPY32(mv_cache[0][1], mv_cache[1][1]);

  696.         AV_COPY32(mv_cache[0][2], mv_cache[1][2]);

  697.     } else {

  698.         AV_COPY32(mv_cache[0][1],

  699.                   cur_frame->motion_val[0][mot_xy - mot_stride]);

  700.         AV_COPY32(mv_cache[0][2],

  701.                   cur_frame->motion_val[0][mot_xy - mot_stride + 1]);

  702.     }

  703. 

  704.     if (mb_x == 0 || IS_INTRA(cur_frame->mb_type[xy - 1])) {

  705.         AV_COPY32(mv_cache[1][0], mv_cache[1][1]);

  706.         AV_COPY32(mv_cache[2][0], mv_cache[2][1]);

  707.     } else {

  708.         AV_COPY32(mv_cache[1][0], cur_frame->motion_val[0][mot_xy - 1]);

  709.         AV_COPY32(mv_cache[2][0],

  710.                   cur_frame->motion_val[0][mot_xy - 1 + mot_stride]);

  711.     }

  712. 

  713.     if (mb_x + 1 >= s->mb_width || IS_INTRA(cur_frame->mb_type[xy + 1])) {

  714.         AV_COPY32(mv_cache[1][3], mv_cache[1][2]);

  715.         AV_COPY32(mv_cache[2][3], mv_cache[2][2]);

  716.     } else {

  717.         AV_COPY32(mv_cache[1][3], cur_frame->motion_val[0][mot_xy + 2]);

  718.         AV_COPY32(mv_cache[2][3],

  719.                   cur_frame->motion_val[0][mot_xy + 2 + mot_stride]);

  720.     }

  721. 

  722.     mx = 0;

  723.     my = 0;

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

  725.         const int x      = (i & 1) + 1;

  726.         const int y      = (i >> 1) + 1;

  727.         int16_t mv[5][2] = {

  728.             { mv_cache[y][x][0],     mv_cache[y][x][1]         },

  729.             { mv_cache[y - 1][x][0], mv_cache[y - 1][x][1]     },

  730.             { mv_cache[y][x - 1][0], mv_cache[y][x - 1][1]     },

  731.             { mv_cache[y][x + 1][0], mv_cache[y][x + 1][1]     },

  732.             { mv_cache[y + 1][x][0], mv_cache[y + 1][x][1]     }

  733.         };

  734.         // FIXME cleanup

  735.         obmc_motion(s, dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,

  736.                     ref_picture[0],

  737.                     mb_x * 16 + (i & 1) * 8, mb_y * 16 + (i >> 1) * 8,

  738.                     pix_op[1],

  739.                     mv);

  740. 

  741.         mx += mv[0][0];

  742.         my += mv[0][1];

  743.     }

  744.     if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))

  745.         chroma_4mv_motion(s, dest_cb, dest_cr,

  746.                           ref_picture, pix_op[1],

  747.                           mx, my);

  748. }

  749. 

  750. static inline void apply_8x8(MpegEncContext *s,

  751.                              uint8_t *dest_y,

  752.                              uint8_t *dest_cb,

  753.                              uint8_t *dest_cr,

  754.                              int dir,

  755.                              uint8_t **ref_picture,

  756.                              qpel_mc_func (*qpix_op)[16],

  757.                              op_pixels_func (*pix_op)[4])

  758. {

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

  760.     int i;

  761.     int mb_x = s->mb_x;

  762.     int mb_y = s->mb_y;

  763.     uint8_t *ptr, *dest;

  764. 

  765.     mx = 0;

  766.     my = 0;

  767.     if (s->quarter_sample) {

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

  769.             int motion_x = s->mv[dir][i][0];

  770.             int motion_y = s->mv[dir][i][1];

  771. 

  772.             dxy   = ((motion_y & 3) << 2) | (motion_x & 3);

  773.             src_x = mb_x * 16 + (motion_x >> 2) + (i & 1) * 8;

  774.             src_y = mb_y * 16 + (motion_y >> 2) + (i >> 1) * 8;

  775. 

  776.             /* WARNING: do no forget half pels */

  777.             src_x = av_clip(src_x, -16, s->width);

  778.             if (src_x == s->width)

  779.                 dxy &= ~3;

  780.             src_y = av_clip(src_y, -16, s->height);

  781.             if (src_y == s->height)

  782.                 dxy &= ~12;

  783. 

  784.             ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);

  785.             if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 3) - 7, 0) ||

  786.                 (unsigned)src_y >= FFMAX(s->v_edge_pos - (motion_y & 3) - 7, 0)) {

  787.                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,

  788.                                          s->linesize, s->linesize,

  789.                                          9, 9,

  790.                                          src_x, src_y,

  791.                                          s->h_edge_pos,

  792.                                          s->v_edge_pos);

  793.                 ptr = s->sc.edge_emu_buffer;

  794.             }

  795.             dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;

  796.             qpix_op[1][dxy](dest, ptr, s->linesize);

  797. 

  798.             mx += s->mv[dir][i][0] / 2;

  799.             my += s->mv[dir][i][1] / 2;

  800.         }

  801.     } else {

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

  803.             hpel_motion(s,

  804.                         dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,

  805.                         ref_picture[0],

  806.                         mb_x * 16 + (i & 1) * 8,

  807.                         mb_y * 16 + (i >> 1) * 8,

  808.                         pix_op[1],

  809.                         s->mv[dir][i][0],

  810.                         s->mv[dir][i][1]);

  811. 

  812.             mx += s->mv[dir][i][0];

  813.             my += s->mv[dir][i][1];

  814.         }

  815.     }

  816. 

  817.     if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))

  818.         chroma_4mv_motion(s, dest_cb, dest_cr,

  819.                           ref_picture, pix_op[1], mx, my);

  820. }

  821. 

  822. /**

  823.  * motion compensation of a single macroblock

  824.  * @param s context

  825.  * @param dest_y luma destination pointer

  826.  * @param dest_cb chroma cb/u destination pointer

  827.  * @param dest_cr chroma cr/v destination pointer

  828.  * @param dir direction (0->forward, 1->backward)

  829.  * @param ref_picture array[3] of pointers to the 3 planes of the reference picture

  830.  * @param pix_op halfpel motion compensation function (average or put normally)

  831.  * @param qpix_op qpel motion compensation function (average or put normally)

  832.  * the motion vectors are taken from s->mv and the MV type from s->mv_type

  833.  */

  834. static av_always_inline void mpv_motion_internal(MpegEncContext *s,

  835.                                                  uint8_t *dest_y,

  836.                                                  uint8_t *dest_cb,

  837.                                                  uint8_t *dest_cr,

  838.                                                  int dir,

  839.                                                  uint8_t **ref_picture,

  840.                                                  op_pixels_func (*pix_op)[4],

  841.                                                  qpel_mc_func (*qpix_op)[16],

  842.                                                  int is_mpeg12)

  843. {

  844.     int i;

  845.     int mb_y = s->mb_y;

  846. 

  847.     prefetch_motion(s, ref_picture, dir);

  848. 

  849.     if (!is_mpeg12 && s->obmc && s->pict_type != AV_PICTURE_TYPE_B) {

  850.         apply_obmc(s, dest_y, dest_cb, dest_cr, ref_picture, pix_op);

  851.         return;

  852.     }

  853. 

  854.     switch (s->mv_type) {

  855.     case MV_TYPE_16X16:

  856.         if (s->mcsel) {

  857.             if (s->real_sprite_warping_points == 1) {

  858.                 gmc1_motion(s, dest_y, dest_cb, dest_cr,

  859.                             ref_picture);

  860.             } else {

  861.                 gmc_motion(s, dest_y, dest_cb, dest_cr,

  862.                            ref_picture);

  863.             }

  864.         } else if (!is_mpeg12 && s->quarter_sample) {

  865.             qpel_motion(s, dest_y, dest_cb, dest_cr,

  866.                         0, 0, 0,

  867.                         ref_picture, pix_op, qpix_op,

  868.                         s->mv[dir][0][0], s->mv[dir][0][1], 16);

  869.         } else if (!is_mpeg12 && (CONFIG_WMV2_DECODER || CONFIG_WMV2_ENCODER) &&

  870.                    s->mspel && s->codec_id == AV_CODEC_ID_WMV2) {

  871.             ff_mspel_motion(s, dest_y, dest_cb, dest_cr,

  872.                             ref_picture, pix_op,

  873.                             s->mv[dir][0][0], s->mv[dir][0][1], 16);

  874.         } else {

  875.             mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,

  876.                         ref_picture, pix_op,

  877.                         s->mv[dir][0][0], s->mv[dir][0][1], 16, 0, mb_y);

  878.         }

  879.         break;

  880.     case MV_TYPE_8X8:

  881.         if (!is_mpeg12)

  882.             apply_8x8(s, dest_y, dest_cb, dest_cr,

  883.                       dir, ref_picture, qpix_op, pix_op);

  884.         break;

  885.     case MV_TYPE_FIELD:

  886.         if (s->picture_structure == PICT_FRAME) {

  887.             if (!is_mpeg12 && s->quarter_sample) {

  888.                 for (i = 0; i < 2; i++)

  889.                     qpel_motion(s, dest_y, dest_cb, dest_cr,

  890.                                 1, i, s->field_select[dir][i],

  891.                                 ref_picture, pix_op, qpix_op,

  892.                                 s->mv[dir][i][0], s->mv[dir][i][1], 8);

  893.             } else {

  894.                 /* top field */

  895.                 mpeg_motion_field(s, dest_y, dest_cb, dest_cr,

  896.                                   0, s->field_select[dir][0],

  897.                                   ref_picture, pix_op,

  898.                                   s->mv[dir][0][0], s->mv[dir][0][1], 8, mb_y);

  899.                 /* bottom field */

  900.                 mpeg_motion_field(s, dest_y, dest_cb, dest_cr,

  901.                                   1, s->field_select[dir][1],

  902.                                   ref_picture, pix_op,

  903.                                   s->mv[dir][1][0], s->mv[dir][1][1], 8, mb_y);

  904.             }

  905.         } else {

  906.             if (   s->picture_structure != s->field_select[dir][0] + 1 && s->pict_type != AV_PICTURE_TYPE_B && !s->first_field

  907.                 || !ref_picture[0]) {

  908.                 ref_picture = s->current_picture_ptr->f->data;

  909.             }

  910. 

  911.             mpeg_motion(s, dest_y, dest_cb, dest_cr,

  912.                         s->field_select[dir][0],

  913.                         ref_picture, pix_op,

  914.                         s->mv[dir][0][0], s->mv[dir][0][1], 16, 0, mb_y >> 1);

  915.         }

  916.         break;

  917.     case MV_TYPE_16X8:

  918.         for (i = 0; i < 2; i++) {

  919.             uint8_t **ref2picture;

  920. 

  921.             if ((s->picture_structure == s->field_select[dir][i] + 1

  922.                 || s->pict_type == AV_PICTURE_TYPE_B || s->first_field) && ref_picture[0]) {

  923.                 ref2picture = ref_picture;

  924.             } else {

  925.                 ref2picture = s->current_picture_ptr->f->data;

  926.             }

  927. 

  928.             mpeg_motion(s, dest_y, dest_cb, dest_cr,

  929.                         s->field_select[dir][i],

  930.                         ref2picture, pix_op,

  931.                         s->mv[dir][i][0], s->mv[dir][i][1],

  932.                         8, 1, (mb_y & ~1) + i);

  933. 

  934.             dest_y  += 16 * s->linesize;

  935.             dest_cb += (16 >> s->chroma_y_shift) * s->uvlinesize;

  936.             dest_cr += (16 >> s->chroma_y_shift) * s->uvlinesize;

  937.         }

  938.         break;

  939.     case MV_TYPE_DMV:

  940.         if (s->picture_structure == PICT_FRAME) {

  941.             for (i = 0; i < 2; i++) {

  942.                 int j;

  943.                 for (j = 0; j < 2; j++)

  944.                     mpeg_motion_field(s, dest_y, dest_cb, dest_cr,

  945.                                       j, j ^ i, ref_picture, pix_op,

  946.                                       s->mv[dir][2 * i + j][0],

  947.                                       s->mv[dir][2 * i + j][1], 8, mb_y);

  948.                 pix_op = s->hdsp.avg_pixels_tab;

  949.             }

  950.         } else {

  951.             if (!ref_picture[0]) {

  952.                 ref_picture = s->current_picture_ptr->f->data;

  953.             }

  954.             for (i = 0; i < 2; i++) {

  955.                 mpeg_motion(s, dest_y, dest_cb, dest_cr,

  956.                             s->picture_structure != i + 1,

  957.                             ref_picture, pix_op,

  958.                             s->mv[dir][2 * i][0], s->mv[dir][2 * i][1],

  959.                             16, 0, mb_y >> 1);

  960. 

  961.                 // after put we make avg of the same block

  962.                 pix_op = s->hdsp.avg_pixels_tab;

  963. 

  964.                 /* opposite parity is always in the same frame if this is

  965.                  * second field */

  966.                 if (!s->first_field) {

  967.                     ref_picture = s->current_picture_ptr->f->data;

  968.                 }

  969.             }

  970.         }

  971.         break;

  972.     default: av_assert2(0);

  973.     }

  974. }

  975. 

  976. void ff_mpv_motion(MpegEncContext *s,

  977.                    uint8_t *dest_y, uint8_t *dest_cb,

  978.                    uint8_t *dest_cr, int dir,

  979.                    uint8_t **ref_picture,

  980.                    op_pixels_func (*pix_op)[4],

  981.                    qpel_mc_func (*qpix_op)[16])

  982. {

  983. #if !CONFIG_SMALL

  984.     if (s->out_format == FMT_MPEG1)

  985.         mpv_motion_internal(s, dest_y, dest_cb, dest_cr, dir,

  986.                             ref_picture, pix_op, qpix_op, 1);

  987.     else

  988. #endif

  989.         mpv_motion_internal(s, dest_y, dest_cb, dest_cr, dir,

  990.                             ref_picture, pix_op, qpix_op, 0);

  991. }