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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 Libav.

  8.  *

  9.  * Libav is free software; you can redistribute it and/or

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

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

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

  13.  *

  14.  * Libav is distributed in the hope that it will be useful,

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

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

  17.  * Lesser General Public License for more details.

  18.  *

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

  20.  * License along with Libav; if not, write to the Free Software

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

  22.  */

  23. 

  24. #include <string.h>

  25. 

  26. #include "libavutil/internal.h"

  27. #include "avcodec.h"

  28. #include "dsputil.h"

  29. #include "h261.h"

  30. #include "mpegvideo.h"

  31. #include "mjpegenc.h"

  32. #include "msmpeg4.h"

  33. #include <limits.h>

  34. 

  35. static void gmc1_motion(MpegEncContext *s,

  36.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  37.                         uint8_t **ref_picture)

  38. {

  39.     uint8_t *ptr;

  40.     int src_x, src_y, motion_x, motion_y;

  41.     ptrdiff_t offset, linesize, uvlinesize;

  42.     int emu = 0;

  43. 

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

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

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

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

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

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

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

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

  52.         motion_x = 0;

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

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

  55.         motion_y = 0;

  56. 

  57.     linesize   = s->linesize;

  58.     uvlinesize = s->uvlinesize;

  59. 

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

  61. 

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

  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, 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. 

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

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

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

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

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

  79.     } else {

  80.         int dxy;

  81. 

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

  83.         if (s->no_rounding) {

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

  85.         } else {

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

  87.         }

  88.     }

  89. 

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

  91.         return;

  92. 

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

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

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

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

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

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

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

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

  101.         motion_x = 0;

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

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

  104.         motion_y = 0;

  105. 

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

  107.     ptr    = ref_picture[1] + offset;

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

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

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

  111.             s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr,

  112.                                      uvlinesize,

  113.                                      9, 9,

  114.                                      src_x, src_y,

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

  116.             ptr = s->edge_emu_buffer;

  117.             emu = 1;

  118.         }

  119.     }

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

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

  122. 

  123.     ptr = ref_picture[2] + offset;

  124.     if (emu) {

  125.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr,

  126.                                  uvlinesize,

  127.                                  9, 9,

  128.                                  src_x, src_y,

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

  130.         ptr = s->edge_emu_buffer;

  131.     }

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

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

  134. }

  135. 

  136. static void gmc_motion(MpegEncContext *s,

  137.                        uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  138.                        uint8_t **ref_picture)

  139. {

  140.     uint8_t *ptr;

  141.     int linesize, uvlinesize;

  142.     const int a = s->sprite_warping_accuracy;

  143.     int ox, oy;

  144. 

  145.     linesize   = s->linesize;

  146.     uvlinesize = s->uvlinesize;

  147. 

  148.     ptr = ref_picture[0];

  149. 

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

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

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

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

  154. 

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

  156.                ox, oy,

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

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

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

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

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

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

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

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

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

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

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

  168. 

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

  170.         return;

  171. 

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

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

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

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

  176. 

  177.     ptr = ref_picture[1];

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

  179.                ox, oy,

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

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

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

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

  184. 

  185.     ptr = ref_picture[2];

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

  187.                ox, oy,

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

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

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

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

  192. }

  193. 

  194. static inline int hpel_motion(MpegEncContext *s,

  195.                               uint8_t *dest, uint8_t *src,

  196.                               int src_x, int src_y,

  197.                               op_pixels_func *pix_op,

  198.                               int motion_x, int motion_y)

  199. {

  200.     int dxy = 0;

  201.     int emu = 0;

  202. 

  203.     src_x += motion_x >> 1;

  204.     src_y += motion_y >> 1;

  205. 

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

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

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

  209.         dxy |= motion_x & 1;

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

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

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

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

  214. 

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

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

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

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

  219.                                      s->linesize,

  220.                                      9, 9,

  221.                                      src_x, src_y, s->h_edge_pos,

  222.                                      s->v_edge_pos);

  223.             src = s->edge_emu_buffer;

  224.             emu = 1;

  225.         }

  226.     }

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

  228.     return emu;

  229. }

  230. 

  231. static av_always_inline

  232. void mpeg_motion_internal(MpegEncContext *s,

  233.                           uint8_t *dest_y,

  234.                           uint8_t *dest_cb,

  235.                           uint8_t *dest_cr,

  236.                           int field_based,

  237.                           int bottom_field,

  238.                           int field_select,

  239.                           uint8_t **ref_picture,

  240.                           op_pixels_func (*pix_op)[4],

  241.                           int motion_x,

  242.                           int motion_y,

  243.                           int h,

  244.                           int is_mpeg12,

  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;

  250.     ptrdiff_t uvlinesize, linesize;

  251. 

  252. #if 0

  253.     if (s->quarter_sample) {

  254.         motion_x >>= 1;

  255.         motion_y >>= 1;

  256.     }

  257. #endif

  258. 

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

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

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

  262. 

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

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

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

  266. 

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

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

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

  270.             my      = motion_y >> 1;

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

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

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

  274.         } else {

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

  276.             uvsrc_x = src_x >> 1;

  277.             uvsrc_y = src_y >> 1;

  278.         }

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

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

  281.         mx      = motion_x / 4;

  282.         my      = motion_y / 4;

  283.         uvdxy   = 0;

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

  285.         uvsrc_y = mb_y * 8 + my;

  286.     } else {

  287.         if (s->chroma_y_shift) {

  288.             mx      = motion_x / 2;

  289.             my      = motion_y / 2;

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

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

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

  293.         } else {

  294.             if (s->chroma_x_shift) {

  295.                 // Chroma422

  296.                 mx      = motion_x / 2;

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

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

  299.                 uvsrc_y = src_y;

  300.             } else {

  301.                 // Chroma444

  302.                 uvdxy   = dxy;

  303.                 uvsrc_x = src_x;

  304.                 uvsrc_y = src_y;

  305.             }

  306.         }

  307.     }

  308. 

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

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

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

  312. 

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

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

  315.         if (is_mpeg12 ||

  316.             s->codec_id == AV_CODEC_ID_MPEG2VIDEO ||

  317.             s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {

  318.             av_log(s->avctx, AV_LOG_DEBUG,

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

  320.                    src_y);

  321.             return;

  322.         }

  323.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr_y,

  324.                                  s->linesize,

  325.                                  17, 17 + field_based,

  326.                                  src_x, src_y << field_based,

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

  328.         ptr_y = s->edge_emu_buffer;

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

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

  331.             s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,

  332.                                      s->uvlinesize,

  333.                                      9, 9 + field_based,

  334.                                      uvsrc_x, uvsrc_y << field_based,

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

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

  337.                                      s->uvlinesize,

  338.                                      9, 9 + field_based,

  339.                                      uvsrc_x, uvsrc_y << field_based,

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

  341.             ptr_cb = uvbuf;

  342.             ptr_cr = uvbuf + 16;

  343.         }

  344.     }

  345. 

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

  347.      * changes picture.data */

  348.     if (bottom_field) {

  349.         dest_y  += s->linesize;

  350.         dest_cb += s->uvlinesize;

  351.         dest_cr += s->uvlinesize;

  352.     }

  353. 

  354.     if (field_select) {

  355.         ptr_y  += s->linesize;

  356.         ptr_cb += s->uvlinesize;

  357.         ptr_cr += s->uvlinesize;

  358.     }

  359. 

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

  361. 

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

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

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

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

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

  367.     }

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

  369.         s->out_format == FMT_H261) {

  370.         ff_h261_loop_filter(s);

  371.     }

  372. }

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

  374. static void mpeg_motion(MpegEncContext *s,

  375.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  376.                         int field_select, uint8_t **ref_picture,

  377.                         op_pixels_func (*pix_op)[4],

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

  379. {

  380. #if !CONFIG_SMALL

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

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

  383.                              field_select, ref_picture, pix_op,

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

  385.     else

  386. #endif

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

  388.                              field_select, ref_picture, pix_op,

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

  390. }

  391. 

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

  393.                               uint8_t *dest_cb, uint8_t *dest_cr,

  394.                               int bottom_field, int field_select,

  395.                               uint8_t **ref_picture,

  396.                               op_pixels_func (*pix_op)[4],

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

  398. {

  399. #if !CONFIG_SMALL

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

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

  402.                              bottom_field, field_select, ref_picture, pix_op,

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

  404.     else

  405. #endif

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

  407.                              bottom_field, field_select, ref_picture, pix_op,

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

  409. }

  410. 

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

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

  413. {

  414.     int x;

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

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

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

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

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

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

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

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

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

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

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

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

  427. 

  428.     x = 0;

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

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

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

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

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

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

  435.     x += stride;

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

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

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

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

  440.     x += stride;

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

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

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

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

  445.     x += 2 * stride;

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

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

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

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

  450.     x += 2*stride;

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

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

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

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

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

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

  457.     x += stride;

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

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

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

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

  462. }

  463. 

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

  465. static inline void obmc_motion(MpegEncContext *s,

  466.                                uint8_t *dest, uint8_t *src,

  467.                                int src_x, int src_y,

  468.                                op_pixels_func *pix_op,

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

  470. #define MID    0

  471. {

  472.     int i;

  473.     uint8_t *ptr[5];

  474. 

  475.     assert(s->quarter_sample == 0);

  476. 

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

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

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

  480.         } else {

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

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

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

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

  485.         }

  486.     }

  487. 

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

  489. }

  490. 

  491. static inline void qpel_motion(MpegEncContext *s,

  492.                                uint8_t *dest_y,

  493.                                uint8_t *dest_cb,

  494.                                uint8_t *dest_cr,

  495.                                int field_based, int bottom_field,

  496.                                int field_select, uint8_t **ref_picture,

  497.                                op_pixels_func (*pix_op)[4],

  498.                                qpel_mc_func (*qpix_op)[16],

  499.                                int motion_x, int motion_y, int h)

  500. {

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

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

  503.     ptrdiff_t linesize, uvlinesize;

  504. 

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

  506. 

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

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

  509. 

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

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

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

  513. 

  514.     if (field_based) {

  515.         mx = motion_x / 2;

  516.         my = motion_y >> 1;

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

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

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

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

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

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

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

  524.     } else {

  525.         mx = motion_x / 2;

  526.         my = motion_y / 2;

  527.     }

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

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

  530. 

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

  532.     mx  >>= 1;

  533.     my  >>= 1;

  534. 

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

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

  537. 

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

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

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

  541. 

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

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

  544.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr_y,

  545.                                  s->linesize,

  546.                                  17, 17 + field_based,

  547.                                  src_x, src_y << field_based,

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

  549.         ptr_y = s->edge_emu_buffer;

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

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

  552.             s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,

  553.                                      s->uvlinesize,

  554.                                      9, 9 + field_based,

  555.                                      uvsrc_x, uvsrc_y << field_based,

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

  557.             s->vdsp.emulated_edge_mc(uvbuf + 16, 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,

  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,

  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.     assert(!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, ptr,

  789.                                              s->linesize,

  790.                                              9, 9,

  791.                                              src_x, src_y,

  792.                                              s->h_edge_pos,

  793.                                              s->v_edge_pos);

  794.                     ptr = s->edge_emu_buffer;

  795.                 }

  796.             }

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

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

  799. 

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

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

  802.         }

  803.     } else {

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

  805.             hpel_motion(s,

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

  807.                         ref_picture[0],

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

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

  810.                         pix_op[1],

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

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

  813. 

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

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

  816.         }

  817.     }

  818. 

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

  820.         chroma_4mv_motion(s, dest_cb, dest_cr,

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

  822. }

  823. 

  824. /**

  825.  * motion compensation of a single macroblock

  826.  * @param s context

  827.  * @param dest_y luma destination pointer

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

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

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

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

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

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

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

  835.  */

  836. static av_always_inline void MPV_motion_internal(MpegEncContext *s,

  837.                                                  uint8_t *dest_y,

  838.                                                  uint8_t *dest_cb,

  839.                                                  uint8_t *dest_cr,

  840.                                                  int dir,

  841.                                                  uint8_t **ref_picture,

  842.                                                  op_pixels_func (*pix_op)[4],

  843.                                                  qpel_mc_func (*qpix_op)[16],

  844.                                                  int is_mpeg12)

  845. {

  846.     int i;

  847.     int mb_y = s->mb_y;

  848. 

  849.     prefetch_motion(s, ref_picture, dir);

  850. 

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

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

  853.         return;

  854.     }

  855. 

  856.     switch (s->mv_type) {

  857.     case MV_TYPE_16X16:

  858.         if (s->mcsel) {

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

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

  861.                             ref_picture);

  862.             } else {

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

  864.                            ref_picture);

  865.             }

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

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

  868.                         0, 0, 0,

  869.                         ref_picture, pix_op, qpix_op,

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

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

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

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

  874.                             ref_picture, pix_op,

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

  876.         } else {

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

  878.                         ref_picture, pix_op,

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

  880.         }

  881.         break;

  882.     case MV_TYPE_8X8:

  883.         if (!is_mpeg12)

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

  885.                       dir, ref_picture, qpix_op, pix_op);

  886.         break;

  887.     case MV_TYPE_FIELD:

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

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

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

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

  892.                                 1, i, s->field_select[dir][i],

  893.                                 ref_picture, pix_op, qpix_op,

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

  895.             } else {

  896.                 /* top field */

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

  898.                                   0, s->field_select[dir][0],

  899.                                   ref_picture, pix_op,

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

  901.                 /* bottom field */

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

  903.                                   1, s->field_select[dir][1],

  904.                                   ref_picture, pix_op,

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

  906.             }

  907.         } else {

  908.             if (s->picture_structure != s->field_select[dir][0] + 1 &&

  909.                 s->pict_type != AV_PICTURE_TYPE_B && !s->first_field) {

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

  911.             }

  912. 

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

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

  915.                         ref_picture, pix_op,

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

  917.         }

  918.         break;

  919.     case MV_TYPE_16X8:

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

  921.             uint8_t **ref2picture;

  922. 

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

  924.                 || s->pict_type == AV_PICTURE_TYPE_B || s->first_field) {

  925.                 ref2picture = ref_picture;

  926.             } else {

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

  928.             }

  929. 

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

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

  932.                         ref2picture, pix_op,

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

  934.                         8, mb_y >> 1);

  935. 

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

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

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

  939.         }

  940.         break;

  941.     case MV_TYPE_DMV:

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

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

  944.                 int j;

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

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

  947.                                       j, j ^ i, ref_picture, pix_op,

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

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

  950.                 pix_op = s->hdsp.avg_pixels_tab;

  951.             }

  952.         } else {

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

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

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

  956.                             ref_picture, pix_op,

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

  958.                             16, mb_y >> 1);

  959. 

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

  961.                 pix_op = s->hdsp.avg_pixels_tab;

  962. 

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

  964.                  * second field */

  965.                 if (!s->first_field) {

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

  967.                 }

  968.             }

  969.         }

  970.         break;

  971.     default: assert(0);

  972.     }

  973. }

  974. 

  975. void ff_MPV_motion(MpegEncContext *s,

  976.                    uint8_t *dest_y, uint8_t *dest_cb,

  977.                    uint8_t *dest_cr, int dir,

  978.                    uint8_t **ref_picture,

  979.                    op_pixels_func (*pix_op)[4],

  980.                    qpel_mc_func (*qpix_op)[16])

  981. {

  982. #if !CONFIG_SMALL

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

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

  985.                             ref_picture, pix_op, qpix_op, 1);

  986.     else

  987. #endif

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

  989.                             ref_picture, pix_op, qpix_op, 0);

  990. }