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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 "avcodec.h"

  29. #include "dsputil.h"

  30. #include "h261.h"

  31. #include "mpegvideo.h"

  32. #include "mjpegenc.h"

  33. #include "msmpeg4.h"

  34. #include <limits.h>

  35. 

  36. static void gmc1_motion(MpegEncContext *s,

  37.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  38.                         uint8_t **ref_picture)

  39. {

  40.     uint8_t *ptr;

  41.     int src_x, src_y, motion_x, motion_y;

  42.     ptrdiff_t offset, linesize, uvlinesize;

  43.     int emu = 0;

  44. 

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

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

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

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

  49.     motion_x <<= (3 - s->sprite_warping_accuracy);

  50.     motion_y <<= (3 - s->sprite_warping_accuracy);

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

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

  53.         motion_x = 0;

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

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

  56.         motion_y = 0;

  57. 

  58.     linesize   = s->linesize;

  59.     uvlinesize = s->uvlinesize;

  60. 

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

  62. 

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

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

  65.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, linesize, ptr,

  66.                                      linesize,

  67.                                      17, 17,

  68.                                      src_x, src_y,

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

  70.             ptr = s->edge_emu_buffer;

  71.         }

  72. 

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

  74.         s->dsp.gmc1(dest_y, ptr, linesize, 16,

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

  76.         s->dsp.gmc1(dest_y + 8, ptr + 8, linesize, 16,

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

  78.     } else {

  79.         int dxy;

  80. 

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

  82.         if (s->no_rounding) {

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

  84.         } else {

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

  86.         }

  87.     }

  88. 

  89.     if (CONFIG_GRAY && s->flags & CODEC_FLAG_GRAY)

  90.         return;

  91. 

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

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

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

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

  96.     motion_x <<= (3 - s->sprite_warping_accuracy);

  97.     motion_y <<= (3 - s->sprite_warping_accuracy);

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

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

  100.         motion_x = 0;

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

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

  103.         motion_y = 0;

  104. 

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

  106.     ptr    = ref_picture[1] + offset;

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

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

  109.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, uvlinesize,

  110.                                      ptr, uvlinesize,

  111.                                      9, 9,

  112.                                      src_x, src_y,

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

  114.             ptr = s->edge_emu_buffer;

  115.             emu = 1;

  116.         }

  117.     s->dsp.gmc1(dest_cb, ptr, uvlinesize, 8,

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

  119. 

  120.     ptr = ref_picture[2] + offset;

  121.     if (emu) {

  122.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, uvlinesize,

  123.                                  ptr, uvlinesize,

  124.                                  9, 9,

  125.                                  src_x, src_y,

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

  127.         ptr = s->edge_emu_buffer;

  128.     }

  129.     s->dsp.gmc1(dest_cr, ptr, uvlinesize, 8,

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

  131. }

  132. 

  133. static void gmc_motion(MpegEncContext *s,

  134.                        uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  135.                        uint8_t **ref_picture)

  136. {

  137.     uint8_t *ptr;

  138.     int linesize, uvlinesize;

  139.     const int a = s->sprite_warping_accuracy;

  140.     int ox, oy;

  141. 

  142.     linesize   = s->linesize;

  143.     uvlinesize = s->uvlinesize;

  144. 

  145.     ptr = ref_picture[0];

  146. 

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

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

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

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

  151. 

  152.     s->dsp.gmc(dest_y, ptr, linesize, 16,

  153.                ox, oy,

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

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

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

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

  158.     s->dsp.gmc(dest_y + 8, ptr, linesize, 16,

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

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

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

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

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

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

  165. 

  166.     if (CONFIG_GRAY && s->flags & CODEC_FLAG_GRAY)

  167.         return;

  168. 

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

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

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

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

  173. 

  174.     ptr = ref_picture[1];

  175.     s->dsp.gmc(dest_cb, ptr, uvlinesize, 8,

  176.                ox, oy,

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

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

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

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

  181. 

  182.     ptr = ref_picture[2];

  183.     s->dsp.gmc(dest_cr, ptr, uvlinesize, 8,

  184.                ox, oy,

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

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

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

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

  189. }

  190. 

  191. static inline int hpel_motion(MpegEncContext *s,

  192.                               uint8_t *dest, uint8_t *src,

  193.                               int src_x, int src_y,

  194.                               op_pixels_func *pix_op,

  195.                               int motion_x, int motion_y)

  196. {

  197.     int dxy = 0;

  198.     int emu = 0;

  199. 

  200.     src_x += motion_x >> 1;

  201.     src_y += motion_y >> 1;

  202. 

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

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

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

  206.         dxy |= motion_x & 1;

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

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

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

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

  211. 

  212.     if (s->unrestricted_mv && (s->flags & CODEC_FLAG_EMU_EDGE)) {

  213.         if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 1) - 8, 0) ||

  214.             (unsigned)src_y > FFMAX(s->v_edge_pos - (motion_y & 1) - 8, 0)) {

  215.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, s->linesize, src,

  216.                                      s->linesize,

  217.                                      9, 9,

  218.                                      src_x, src_y,

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

  220.             src = s->edge_emu_buffer;

  221.             emu = 1;

  222.         }

  223.     }

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

  225.     return emu;

  226. }

  227. 

  228. static av_always_inline

  229. void mpeg_motion_internal(MpegEncContext *s,

  230.                           uint8_t *dest_y,

  231.                           uint8_t *dest_cb,

  232.                           uint8_t *dest_cr,

  233.                           int field_based,

  234.                           int bottom_field,

  235.                           int field_select,

  236.                           uint8_t **ref_picture,

  237.                           op_pixels_func (*pix_op)[4],

  238.                           int motion_x,

  239.                           int motion_y,

  240.                           int h,

  241.                           int is_mpeg12,

  242.                           int mb_y)

  243. {

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

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

  246.         uvsrc_x, uvsrc_y, v_edge_pos;

  247.     ptrdiff_t uvlinesize, linesize;

  248. 

  249. #if 0

  250.     if (s->quarter_sample) {

  251.         motion_x >>= 1;

  252.         motion_y >>= 1;

  253.     }

  254. #endif

  255. 

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

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

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

  259. 

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

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

  262.     src_y = (mb_y << (4 - field_based)) + (motion_y >> 1);

  263. 

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

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

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

  267.             my      = motion_y >> 1;

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

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

  270.             uvsrc_y = (mb_y << (3 - field_based)) + (my >> 1);

  271.         } else {

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

  273.             uvsrc_x = src_x >> 1;

  274.             uvsrc_y = src_y >> 1;

  275.         }

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

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

  278.         mx      = motion_x / 4;

  279.         my      = motion_y / 4;

  280.         uvdxy   = 0;

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

  282.         uvsrc_y = mb_y * 8 + my;

  283.     } else {

  284.         if (s->chroma_y_shift) {

  285.             mx      = motion_x / 2;

  286.             my      = motion_y / 2;

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

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

  289.             uvsrc_y = (mb_y << (3 - field_based)) + (my >> 1);

  290.         } else {

  291.             if (s->chroma_x_shift) {

  292.                 // Chroma422

  293.                 mx      = motion_x / 2;

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

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

  296.                 uvsrc_y = src_y;

  297.             } else {

  298.                 // Chroma444

  299.                 uvdxy   = dxy;

  300.                 uvsrc_x = src_x;

  301.                 uvsrc_y = src_y;

  302.             }

  303.         }

  304.     }

  305. 

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

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

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

  309. 

  310.     if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 1) - 16, 0) ||

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

  312.         if (is_mpeg12 ||

  313.             s->codec_id == AV_CODEC_ID_MPEG2VIDEO ||

  314.             s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {

  315.             av_log(s->avctx, AV_LOG_DEBUG,

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

  317.                    src_y);

  318.             return;

  319.         }

  320.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, s->linesize, ptr_y,

  321.                                  s->linesize,

  322.                                  17, 17 + field_based,

  323.                                  src_x, src_y << field_based,

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

  325.         ptr_y = s->edge_emu_buffer;

  326.         if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {

  327.             uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize;

  328.             s->vdsp.emulated_edge_mc(uvbuf, s->uvlinesize, ptr_cb,

  329.                                      s->uvlinesize,

  330.                                      9, 9 + field_based,

  331.                                      uvsrc_x, uvsrc_y << field_based,

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

  333.             s->vdsp.emulated_edge_mc(uvbuf + 16, s->uvlinesize, ptr_cr,

  334.                                      s->uvlinesize,

  335.                                      9, 9 + field_based,

  336.                                      uvsrc_x, uvsrc_y << field_based,

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

  338.             ptr_cb = uvbuf;

  339.             ptr_cr = uvbuf + 16;

  340.         }

  341.     }

  342. 

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

  344.      * changes picture.data */

  345.     if (bottom_field) {

  346.         dest_y  += s->linesize;

  347.         dest_cb += s->uvlinesize;

  348.         dest_cr += s->uvlinesize;

  349.     }

  350. 

  351.     if (field_select) {

  352.         ptr_y  += s->linesize;

  353.         ptr_cb += s->uvlinesize;

  354.         ptr_cr += s->uvlinesize;

  355.     }

  356. 

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

  358. 

  359.     if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {

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

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

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

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

  364.     }

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

  366.         s->out_format == FMT_H261) {

  367.         ff_h261_loop_filter(s);

  368.     }

  369. }

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

  371. static void mpeg_motion(MpegEncContext *s,

  372.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  373.                         int field_select, uint8_t **ref_picture,

  374.                         op_pixels_func (*pix_op)[4],

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

  376. {

  377. #if !CONFIG_SMALL

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

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

  380.                              field_select, ref_picture, pix_op,

  381.                              motion_x, motion_y, h, 1, mb_y);

  382.     else

  383. #endif

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

  385.                              field_select, ref_picture, pix_op,

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

  387. }

  388. 

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

  390.                               uint8_t *dest_cb, uint8_t *dest_cr,

  391.                               int bottom_field, int field_select,

  392.                               uint8_t **ref_picture,

  393.                               op_pixels_func (*pix_op)[4],

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

  395. {

  396. #if !CONFIG_SMALL

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

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

  399.                              bottom_field, field_select, ref_picture, pix_op,

  400.                              motion_x, motion_y, h, 1, mb_y);

  401.     else

  402. #endif

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

  404.                              bottom_field, field_select, ref_picture, pix_op,

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

  406. }

  407. 

  408. // FIXME move to dsputil, avg variant, 16x16 version

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

  410. {

  411.     int x;

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

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

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

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

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

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

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

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

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

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

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

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

  424. 

  425.     x = 0;

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

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

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

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

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

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

  432.     x += stride;

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

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

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

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

  437.     x += stride;

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

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

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

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

  442.     x += 2 * stride;

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

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

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

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

  447.     x += 2*stride;

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

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

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

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

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

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

  454.     x += stride;

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

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

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

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

  459. }

  460. 

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

  462. static inline void obmc_motion(MpegEncContext *s,

  463.                                uint8_t *dest, uint8_t *src,

  464.                                int src_x, int src_y,

  465.                                op_pixels_func *pix_op,

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

  467. #define MID    0

  468. {

  469.     int i;

  470.     uint8_t *ptr[5];

  471. 

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

  473. 

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

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

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

  477.         } else {

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

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

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

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

  482.         }

  483.     }

  484. 

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

  486. }

  487. 

  488. static inline void qpel_motion(MpegEncContext *s,

  489.                                uint8_t *dest_y,

  490.                                uint8_t *dest_cb,

  491.                                uint8_t *dest_cr,

  492.                                int field_based, int bottom_field,

  493.                                int field_select, uint8_t **ref_picture,

  494.                                op_pixels_func (*pix_op)[4],

  495.                                qpel_mc_func (*qpix_op)[16],

  496.                                int motion_x, int motion_y, int h)

  497. {

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

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

  500.     ptrdiff_t linesize, uvlinesize;

  501. 

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

  503. 

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

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

  506. 

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

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

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

  510. 

  511.     if (field_based) {

  512.         mx = motion_x / 2;

  513.         my = motion_y >> 1;

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

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

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

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

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

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

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

  521.     } else {

  522.         mx = motion_x / 2;

  523.         my = motion_y / 2;

  524.     }

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

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

  527. 

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

  529.     mx  >>= 1;

  530.     my  >>= 1;

  531. 

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

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

  534. 

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

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

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

  538. 

  539.     if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 3) - 16, 0) ||

  540.         (unsigned)src_y > FFMAX(   v_edge_pos - (motion_y & 3) - h, 0)) {

  541.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer,

  542.                                  s->linesize,

  543.                                  ptr_y, s->linesize,

  544.                                  17, 17 + field_based,

  545.                                  src_x, src_y << field_based,

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

  547.         ptr_y = s->edge_emu_buffer;

  548.         if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {

  549.             uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize;

  550.             s->vdsp.emulated_edge_mc(uvbuf, s->uvlinesize,

  551.                                      ptr_cb,

  552.                                      s->uvlinesize,

  553.                                      9, 9 + field_based,

  554.                                      uvsrc_x, uvsrc_y << field_based,

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

  556.             s->vdsp.emulated_edge_mc(uvbuf + 16, s->uvlinesize,

  557.                                      ptr_cr,

  558.                                      s->uvlinesize,

  559.                                      9, 9 + field_based,

  560.                                      uvsrc_x, uvsrc_y << field_based,

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

  562.             ptr_cb = uvbuf;

  563.             ptr_cr = uvbuf + 16;

  564.         }

  565.     }

  566. 

  567.     if (!field_based)

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

  569.     else {

  570.         if (bottom_field) {

  571.             dest_y  += s->linesize;

  572.             dest_cb += s->uvlinesize;

  573.             dest_cr += s->uvlinesize;

  574.         }

  575. 

  576.         if (field_select) {

  577.             ptr_y  += s->linesize;

  578.             ptr_cb += s->uvlinesize;

  579.             ptr_cr += s->uvlinesize;

  580.         }

  581.         // damn interlaced mode

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

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

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

  585.     }

  586.     if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {

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

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

  589.     }

  590. }

  591. 

  592. /**

  593.  * h263 chroma 4mv motion compensation.

  594.  */

  595. static void chroma_4mv_motion(MpegEncContext *s,

  596.                               uint8_t *dest_cb, uint8_t *dest_cr,

  597.                               uint8_t **ref_picture,

  598.                               op_pixels_func *pix_op,

  599.                               int mx, int my)

  600. {

  601.     uint8_t *ptr;

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

  603.     ptrdiff_t offset;

  604. 

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

  606.      * with a special rounding */

  607.     mx = ff_h263_round_chroma(mx);

  608.     my = ff_h263_round_chroma(my);

  609. 

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

  611.     mx >>= 1;

  612.     my >>= 1;

  613. 

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

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

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

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

  618.         dxy &= ~1;

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

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

  621.         dxy &= ~2;

  622. 

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

  624.     ptr    = ref_picture[1] + offset;

  625.     if (s->flags & CODEC_FLAG_EMU_EDGE) {

  626.         if ((unsigned)src_x > FFMAX((s->h_edge_pos >> 1) - (dxy & 1) - 8, 0) ||

  627.             (unsigned)src_y > FFMAX((s->v_edge_pos >> 1) - (dxy >> 1) - 8, 0)) {

  628.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, s->uvlinesize,

  629.                                      ptr, s->uvlinesize,

  630.                                      9, 9, src_x, src_y,

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

  632.             ptr = s->edge_emu_buffer;

  633.             emu = 1;

  634.         }

  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->edge_emu_buffer, s->uvlinesize,

  641.                                  ptr, s->uvlinesize,

  642.                                  9, 9, src_x, src_y,

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

  644.         ptr = s->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->flags & 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 (s->flags & CODEC_FLAG_EMU_EDGE) {

  786.                 if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 3) - 8, 0) ||

  787.                     (unsigned)src_y > FFMAX(s->v_edge_pos - (motion_y & 3) - 8, 0)) {

  788.                     s->vdsp.emulated_edge_mc(s->edge_emu_buffer,

  789.                                              s->linesize, ptr,

  790.                                              s->linesize,

  791.                                              9, 9,

  792.                                              src_x, src_y,

  793.                                              s->h_edge_pos,

  794.                                              s->v_edge_pos);

  795.                     ptr = s->edge_emu_buffer;

  796.                 }

  797.             }

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

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

  800. 

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

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

  803.         }

  804.     } else {

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

  806.             hpel_motion(s,

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

  808.                         ref_picture[0],

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

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

  811.                         pix_op[1],

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

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

  814. 

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

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

  817.         }

  818.     }

  819. 

  820.     if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY))

  821.         chroma_4mv_motion(s, dest_cb, dest_cr,

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

  823. }

  824. 

  825. /**

  826.  * motion compensation of a single macroblock

  827.  * @param s context

  828.  * @param dest_y luma destination pointer

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

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

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

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

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

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

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

  836.  */

  837. static av_always_inline void MPV_motion_internal(MpegEncContext *s,

  838.                                                  uint8_t *dest_y,

  839.                                                  uint8_t *dest_cb,

  840.                                                  uint8_t *dest_cr,

  841.                                                  int dir,

  842.                                                  uint8_t **ref_picture,

  843.                                                  op_pixels_func (*pix_op)[4],

  844.                                                  qpel_mc_func (*qpix_op)[16],

  845.                                                  int is_mpeg12)

  846. {

  847.     int i;

  848.     int mb_y = s->mb_y;

  849. 

  850.     prefetch_motion(s, ref_picture, dir);

  851. 

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

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

  854.         return;

  855.     }

  856. 

  857.     switch (s->mv_type) {

  858.     case MV_TYPE_16X16:

  859.         if (s->mcsel) {

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

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

  862.                             ref_picture);

  863.             } else {

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

  865.                            ref_picture);

  866.             }

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

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

  869.                         0, 0, 0,

  870.                         ref_picture, pix_op, qpix_op,

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

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

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

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

  875.                             ref_picture, pix_op,

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

  877.         } else {

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

  879.                         ref_picture, pix_op,

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

  881.         }

  882.         break;

  883.     case MV_TYPE_8X8:

  884.         if (!is_mpeg12)

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

  886.                       dir, ref_picture, qpix_op, pix_op);

  887.         break;

  888.     case MV_TYPE_FIELD:

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

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

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

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

  893.                                 1, i, s->field_select[dir][i],

  894.                                 ref_picture, pix_op, qpix_op,

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

  896.             } else {

  897.                 /* top field */

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

  899.                                   0, s->field_select[dir][0],

  900.                                   ref_picture, pix_op,

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

  902.                 /* bottom field */

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

  904.                                   1, s->field_select[dir][1],

  905.                                   ref_picture, pix_op,

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

  907.             }

  908.         } else {

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

  910.                 || !ref_picture[0]) {

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

  912.             }

  913. 

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

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

  916.                         ref_picture, pix_op,

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

  918.         }

  919.         break;

  920.     case MV_TYPE_16X8:

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

  922.             uint8_t **ref2picture;

  923. 

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

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

  926.                 ref2picture = ref_picture;

  927.             } else {

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

  929.             }

  930. 

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

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

  933.                         ref2picture, pix_op,

  934.                         s->mv[dir][i][0], s->mv[dir][i][1] + 16 * i,

  935.                         8, mb_y >> 1);

  936. 

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

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

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

  940.         }

  941.         break;

  942.     case MV_TYPE_DMV:

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

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

  945.                 int j;

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

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

  948.                                       j, j ^ i, ref_picture, pix_op,

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

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

  951.                 pix_op = s->hdsp.avg_pixels_tab;

  952.             }

  953.         } else {

  954.             if (!ref_picture[0]) {

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

  956.             }

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

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

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

  960.                             ref_picture, pix_op,

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

  962.                             16, mb_y >> 1);

  963. 

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

  965.                 pix_op = s->hdsp.avg_pixels_tab;

  966. 

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

  968.                  * second field */

  969.                 if (!s->first_field) {

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

  971.                 }

  972.             }

  973.         }

  974.         break;

  975.     default: av_assert2(0);

  976.     }

  977. }

  978. 

  979. void ff_MPV_motion(MpegEncContext *s,

  980.                    uint8_t *dest_y, uint8_t *dest_cb,

  981.                    uint8_t *dest_cr, int dir,

  982.                    uint8_t **ref_picture,

  983.                    op_pixels_func (*pix_op)[4],

  984.                    qpel_mc_func (*qpix_op)[16])

  985. {

  986. #if !CONFIG_SMALL

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

  988.         MPV_motion_internal(s, dest_y, dest_cb, dest_cr, dir,

  989.                             ref_picture, pix_op, qpix_op, 1);

  990.     else

  991. #endif

  992.         MPV_motion_internal(s, dest_y, dest_cb, dest_cr, dir,

  993.                             ref_picture, pix_op, qpix_op, 0);

  994. }