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

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

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

  65.                                  linesize, linesize,

  66.                                  17, 17,

  67.                                  src_x, src_y,

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

  69.         ptr = s->edge_emu_buffer;

  70.     }

  71. 

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

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

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

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

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

  77.     } else {

  78.         int dxy;

  79. 

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

  81.         if (s->no_rounding) {

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

  83.         } else {

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

  85.         }

  86.     }

  87. 

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

  89.         return;

  90. 

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

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

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

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

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

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

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

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

  99.         motion_x = 0;

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

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

  102.         motion_y = 0;

  103. 

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

  105.     ptr    = ref_picture[1] + offset;

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

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

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

  109.                                  uvlinesize, uvlinesize,

  110.                                  9, 9,

  111.                                  src_x, src_y,

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

  113.         ptr = s->edge_emu_buffer;

  114.         emu = 1;

  115.     }

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

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

  118. 

  119.     ptr = ref_picture[2] + offset;

  120.     if (emu) {

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

  122.                                  uvlinesize, uvlinesize,

  123.                                  9, 9,

  124.                                  src_x, src_y,

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

  126.         ptr = s->edge_emu_buffer;

  127.     }

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

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

  130. }

  131. 

  132. static void gmc_motion(MpegEncContext *s,

  133.                        uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  134.                        uint8_t **ref_picture)

  135. {

  136.     uint8_t *ptr;

  137.     int linesize, uvlinesize;

  138.     const int a = s->sprite_warping_accuracy;

  139.     int ox, oy;

  140. 

  141.     linesize   = s->linesize;

  142.     uvlinesize = s->uvlinesize;

  143. 

  144.     ptr = ref_picture[0];

  145. 

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

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

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

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

  150. 

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

  152.                ox, oy,

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

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

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

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

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

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

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

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

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

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

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

  164. 

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

  166.         return;

  167. 

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

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

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

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

  172. 

  173.     ptr = ref_picture[1];

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

  175.                ox, oy,

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

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

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

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

  180. 

  181.     ptr = ref_picture[2];

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

  183.                ox, oy,

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

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

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

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

  188. }

  189. 

  190. static inline int hpel_motion(MpegEncContext *s,

  191.                               uint8_t *dest, uint8_t *src,

  192.                               int src_x, int src_y,

  193.                               op_pixels_func *pix_op,

  194.                               int motion_x, int motion_y)

  195. {

  196.     int dxy = 0;

  197.     int emu = 0;

  198. 

  199.     src_x += motion_x >> 1;

  200.     src_y += motion_y >> 1;

  201. 

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

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

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

  205.         dxy |= motion_x & 1;

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

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

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

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

  210. 

  211.     if (s->unrestricted_mv) {

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

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

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

  215.                                      s->linesize, s->linesize,

  216.                                      9, 9,

  217.                                      src_x, src_y, s->h_edge_pos,

  218.                                      s->v_edge_pos);

  219.             src = s->edge_emu_buffer;

  220.             emu = 1;

  221.         }

  222.     }

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

  224.     return emu;

  225. }

  226. 

  227. static av_always_inline

  228. void mpeg_motion_internal(MpegEncContext *s,

  229.                           uint8_t *dest_y,

  230.                           uint8_t *dest_cb,

  231.                           uint8_t *dest_cr,

  232.                           int field_based,

  233.                           int bottom_field,

  234.                           int field_select,

  235.                           uint8_t **ref_picture,

  236.                           op_pixels_func (*pix_op)[4],

  237.                           int motion_x,

  238.                           int motion_y,

  239.                           int h,

  240.                           int is_mpeg12,

  241.                           int mb_y)

  242. {

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

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

  245.         uvsrc_x, uvsrc_y, v_edge_pos;

  246.     ptrdiff_t uvlinesize, linesize;

  247. 

  248. #if 0

  249.     if (s->quarter_sample) {

  250.         motion_x >>= 1;

  251.         motion_y >>= 1;

  252.     }

  253. #endif

  254. 

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

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

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

  258. 

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

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

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

  262. 

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

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

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

  266.             my      = motion_y >> 1;

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

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

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

  270.         } else {

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

  272.             uvsrc_x = src_x >> 1;

  273.             uvsrc_y = src_y >> 1;

  274.         }

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

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

  277.         mx      = motion_x / 4;

  278.         my      = motion_y / 4;

  279.         uvdxy   = 0;

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

  281.         uvsrc_y = mb_y * 8 + my;

  282.     } else {

  283.         if (s->chroma_y_shift) {

  284.             mx      = motion_x / 2;

  285.             my      = motion_y / 2;

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

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

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

  289.         } else {

  290.             if (s->chroma_x_shift) {

  291.                 // Chroma422

  292.                 mx      = motion_x / 2;

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

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

  295.                 uvsrc_y = src_y;

  296.             } else {

  297.                 // Chroma444

  298.                 uvdxy   = dxy;

  299.                 uvsrc_x = src_x;

  300.                 uvsrc_y = src_y;

  301.             }

  302.         }

  303.     }

  304. 

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

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

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

  308. 

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

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

  311.         if (is_mpeg12 ||

  312.             s->codec_id == AV_CODEC_ID_MPEG2VIDEO ||

  313.             s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {

  314.             av_log(s->avctx, AV_LOG_DEBUG,

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

  316.                    src_y);

  317.             return;

  318.         }

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

  320.                                  s->linesize, s->linesize,

  321.                                  17, 17 + field_based,

  322.                                  src_x, src_y << field_based,

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

  324.         ptr_y = s->edge_emu_buffer;

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

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

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

  328.                                      s->uvlinesize, s->uvlinesize,

  329.                                      9, 9 + field_based,

  330.                                      uvsrc_x, uvsrc_y << field_based,

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

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

  333.                                      s->uvlinesize, s->uvlinesize,

  334.                                      9, 9 + field_based,

  335.                                      uvsrc_x, uvsrc_y << field_based,

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

  337.             ptr_cb = uvbuf;

  338.             ptr_cr = uvbuf + 16;

  339.         }

  340.     }

  341. 

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

  343.      * changes picture.data */

  344.     if (bottom_field) {

  345.         dest_y  += s->linesize;

  346.         dest_cb += s->uvlinesize;

  347.         dest_cr += s->uvlinesize;

  348.     }

  349. 

  350.     if (field_select) {

  351.         ptr_y  += s->linesize;

  352.         ptr_cb += s->uvlinesize;

  353.         ptr_cr += s->uvlinesize;

  354.     }

  355. 

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

  357. 

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

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

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

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

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

  363.     }

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

  365.         s->out_format == FMT_H261) {

  366.         ff_h261_loop_filter(s);

  367.     }

  368. }

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

  370. static void mpeg_motion(MpegEncContext *s,

  371.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  372.                         int field_select, uint8_t **ref_picture,

  373.                         op_pixels_func (*pix_op)[4],

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

  375. {

  376. #if !CONFIG_SMALL

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

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

  379.                              field_select, ref_picture, pix_op,

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

  381.     else

  382. #endif

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

  384.                              field_select, ref_picture, pix_op,

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

  386. }

  387. 

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

  389.                               uint8_t *dest_cb, uint8_t *dest_cr,

  390.                               int bottom_field, int field_select,

  391.                               uint8_t **ref_picture,

  392.                               op_pixels_func (*pix_op)[4],

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

  394. {

  395. #if !CONFIG_SMALL

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

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

  398.                              bottom_field, field_select, ref_picture, pix_op,

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

  400.     else

  401. #endif

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

  403.                              bottom_field, field_select, ref_picture, pix_op,

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

  405. }

  406. 

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

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

  409. {

  410.     int x;

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

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

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

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

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

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

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

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

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

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

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

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

  423. 

  424.     x = 0;

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

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

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

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

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

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

  431.     x += stride;

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

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

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

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

  436.     x += stride;

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

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

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

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

  441.     x += 2 * stride;

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

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

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

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

  446.     x += 2*stride;

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

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

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

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

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

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

  453.     x += stride;

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

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

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

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

  458. }

  459. 

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

  461. static inline void obmc_motion(MpegEncContext *s,

  462.                                uint8_t *dest, uint8_t *src,

  463.                                int src_x, int src_y,

  464.                                op_pixels_func *pix_op,

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

  466. #define MID    0

  467. {

  468.     int i;

  469.     uint8_t *ptr[5];

  470. 

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

  472. 

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

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

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

  476.         } else {

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

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

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

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

  481.         }

  482.     }

  483. 

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

  485. }

  486. 

  487. static inline void qpel_motion(MpegEncContext *s,

  488.                                uint8_t *dest_y,

  489.                                uint8_t *dest_cb,

  490.                                uint8_t *dest_cr,

  491.                                int field_based, int bottom_field,

  492.                                int field_select, uint8_t **ref_picture,

  493.                                op_pixels_func (*pix_op)[4],

  494.                                qpel_mc_func (*qpix_op)[16],

  495.                                int motion_x, int motion_y, int h)

  496. {

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

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

  499.     ptrdiff_t linesize, uvlinesize;

  500. 

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

  502. 

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

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

  505. 

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

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

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

  509. 

  510.     if (field_based) {

  511.         mx = motion_x / 2;

  512.         my = motion_y >> 1;

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

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

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

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

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

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

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

  520.     } else {

  521.         mx = motion_x / 2;

  522.         my = motion_y / 2;

  523.     }

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

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

  526. 

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

  528.     mx  >>= 1;

  529.     my  >>= 1;

  530. 

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

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

  533. 

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

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

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

  537. 

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

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

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

  541.                                  s->linesize, s->linesize,

  542.                                  17, 17 + field_based,

  543.                                  src_x, src_y << field_based,

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

  545.         ptr_y = s->edge_emu_buffer;

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

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

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

  549.                                      s->uvlinesize, s->uvlinesize,

  550.                                      9, 9 + field_based,

  551.                                      uvsrc_x, uvsrc_y << field_based,

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

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

  554.                                      s->uvlinesize, s->uvlinesize,

  555.                                      9, 9 + field_based,

  556.                                      uvsrc_x, uvsrc_y << field_based,

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

  558.             ptr_cb = uvbuf;

  559.             ptr_cr = uvbuf + 16;

  560.         }

  561.     }

  562. 

  563.     if (!field_based)

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

  565.     else {

  566.         if (bottom_field) {

  567.             dest_y  += s->linesize;

  568.             dest_cb += s->uvlinesize;

  569.             dest_cr += s->uvlinesize;

  570.         }

  571. 

  572.         if (field_select) {

  573.             ptr_y  += s->linesize;

  574.             ptr_cb += s->uvlinesize;

  575.             ptr_cr += s->uvlinesize;

  576.         }

  577.         // damn interlaced mode

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

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

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

  581.     }

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

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

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

  585.     }

  586. }

  587. 

  588. /**

  589.  * h263 chroma 4mv motion compensation.

  590.  */

  591. static void chroma_4mv_motion(MpegEncContext *s,

  592.                               uint8_t *dest_cb, uint8_t *dest_cr,

  593.                               uint8_t **ref_picture,

  594.                               op_pixels_func *pix_op,

  595.                               int mx, int my)

  596. {

  597.     uint8_t *ptr;

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

  599.     ptrdiff_t offset;

  600. 

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

  602.      * with a special rounding */

  603.     mx = ff_h263_round_chroma(mx);

  604.     my = ff_h263_round_chroma(my);

  605. 

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

  607.     mx >>= 1;

  608.     my >>= 1;

  609. 

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

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

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

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

  614.         dxy &= ~1;

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

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

  617.         dxy &= ~2;

  618. 

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

  620.     ptr    = ref_picture[1] + offset;

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

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

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

  624.                                  s->uvlinesize, s->uvlinesize,

  625.                                  9, 9, src_x, src_y,

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

  627.         ptr = s->edge_emu_buffer;

  628.         emu = 1;

  629.     }

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

  631. 

  632.     ptr = ref_picture[2] + offset;

  633.     if (emu) {

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

  635.                                  s->uvlinesize, s->uvlinesize,

  636.                                  9, 9, src_x, src_y,

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

  638.         ptr = s->edge_emu_buffer;

  639.     }

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

  641. }

  642. 

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

  644. {

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

  646.      * optimized for 64byte cache lines */

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

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

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

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

  651. 

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

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

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

  655. }

  656. 

  657. static inline void apply_obmc(MpegEncContext *s,

  658.                               uint8_t *dest_y,

  659.                               uint8_t *dest_cb,

  660.                               uint8_t *dest_cr,

  661.                               uint8_t **ref_picture,

  662.                               op_pixels_func (*pix_op)[4])

  663. {

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

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

  666.     int mb_x = s->mb_x;

  667.     int mb_y = s->mb_y;

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

  669.     const int mot_stride = s->b8_stride;

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

  671.     int mx, my, i;

  672. 

  673.     assert(!s->mb_skipped);

  674. 

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

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

  677. 

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

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

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

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

  682. 

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

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

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

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

  687. 

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

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

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

  691.     } else {

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

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

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

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

  696.     }

  697. 

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

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

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

  701.     } else {

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

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

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

  705.     }

  706. 

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

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

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

  710.     } else {

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

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

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

  714.     }

  715. 

  716.     mx = 0;

  717.     my = 0;

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

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

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

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

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

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

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

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

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

  727.         };

  728.         // FIXME cleanup

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

  730.                     ref_picture[0],

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

  732.                     pix_op[1],

  733.                     mv);

  734. 

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

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

  737.     }

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

  739.         chroma_4mv_motion(s, dest_cb, dest_cr,

  740.                           ref_picture, pix_op[1],

  741.                           mx, my);

  742. }

  743. 

  744. static inline void apply_8x8(MpegEncContext *s,

  745.                              uint8_t *dest_y,

  746.                              uint8_t *dest_cb,

  747.                              uint8_t *dest_cr,

  748.                              int dir,

  749.                              uint8_t **ref_picture,

  750.                              qpel_mc_func (*qpix_op)[16],

  751.                              op_pixels_func (*pix_op)[4])

  752. {

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

  754.     int i;

  755.     int mb_x = s->mb_x;

  756.     int mb_y = s->mb_y;

  757.     uint8_t *ptr, *dest;

  758. 

  759.     mx = 0;

  760.     my = 0;

  761.     if (s->quarter_sample) {

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

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

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

  765. 

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

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

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

  769. 

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

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

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

  773.                 dxy &= ~3;

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

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

  776.                 dxy &= ~12;

  777. 

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

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

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

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

  782.                                          s->linesize, s->linesize,

  783.                                          9, 9,

  784.                                          src_x, src_y,

  785.                                          s->h_edge_pos,

  786.                                          s->v_edge_pos);

  787.                 ptr = s->edge_emu_buffer;

  788.             }

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

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

  791. 

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

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

  794.         }

  795.     } else {

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

  797.             hpel_motion(s,

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

  799.                         ref_picture[0],

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

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

  802.                         pix_op[1],

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

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

  805. 

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

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

  808.         }

  809.     }

  810. 

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

  812.         chroma_4mv_motion(s, dest_cb, dest_cr,

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

  814. }

  815. 

  816. /**

  817.  * motion compensation of a single macroblock

  818.  * @param s context

  819.  * @param dest_y luma destination pointer

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

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

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

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

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

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

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

  827.  */

  828. static av_always_inline void MPV_motion_internal(MpegEncContext *s,

  829.                                                  uint8_t *dest_y,

  830.                                                  uint8_t *dest_cb,

  831.                                                  uint8_t *dest_cr,

  832.                                                  int dir,

  833.                                                  uint8_t **ref_picture,

  834.                                                  op_pixels_func (*pix_op)[4],

  835.                                                  qpel_mc_func (*qpix_op)[16],

  836.                                                  int is_mpeg12)

  837. {

  838.     int i;

  839.     int mb_y = s->mb_y;

  840. 

  841.     prefetch_motion(s, ref_picture, dir);

  842. 

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

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

  845.         return;

  846.     }

  847. 

  848.     switch (s->mv_type) {

  849.     case MV_TYPE_16X16:

  850.         if (s->mcsel) {

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

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

  853.                             ref_picture);

  854.             } else {

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

  856.                            ref_picture);

  857.             }

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

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

  860.                         0, 0, 0,

  861.                         ref_picture, pix_op, qpix_op,

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

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

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

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

  866.                             ref_picture, pix_op,

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

  868.         } else {

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

  870.                         ref_picture, pix_op,

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

  872.         }

  873.         break;

  874.     case MV_TYPE_8X8:

  875.         if (!is_mpeg12)

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

  877.                       dir, ref_picture, qpix_op, pix_op);

  878.         break;

  879.     case MV_TYPE_FIELD:

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

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

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

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

  884.                                 1, i, s->field_select[dir][i],

  885.                                 ref_picture, pix_op, qpix_op,

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

  887.             } else {

  888.                 /* top field */

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

  890.                                   0, s->field_select[dir][0],

  891.                                   ref_picture, pix_op,

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

  893.                 /* bottom field */

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

  895.                                   1, s->field_select[dir][1],

  896.                                   ref_picture, pix_op,

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

  898.             }

  899.         } else {

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

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

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

  903.             }

  904. 

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

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

  907.                         ref_picture, pix_op,

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

  909.         }

  910.         break;

  911.     case MV_TYPE_16X8:

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

  913.             uint8_t **ref2picture;

  914. 

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

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

  917.                 ref2picture = ref_picture;

  918.             } else {

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

  920.             }

  921. 

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

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

  924.                         ref2picture, pix_op,

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

  926.                         8, mb_y >> 1);

  927. 

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

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

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

  931.         }

  932.         break;

  933.     case MV_TYPE_DMV:

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

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

  936.                 int j;

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

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

  939.                                       j, j ^ i, ref_picture, pix_op,

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

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

  942.                 pix_op = s->hdsp.avg_pixels_tab;

  943.             }

  944.         } else {

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

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

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

  948.                             ref_picture, pix_op,

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

  950.                             16, mb_y >> 1);

  951. 

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

  953.                 pix_op = s->hdsp.avg_pixels_tab;

  954. 

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

  956.                  * second field */

  957.                 if (!s->first_field) {

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

  959.                 }

  960.             }

  961.         }

  962.         break;

  963.     default: assert(0);

  964.     }

  965. }

  966. 

  967. void ff_MPV_motion(MpegEncContext *s,

  968.                    uint8_t *dest_y, uint8_t *dest_cb,

  969.                    uint8_t *dest_cr, int dir,

  970.                    uint8_t **ref_picture,

  971.                    op_pixels_func (*pix_op)[4],

  972.                    qpel_mc_func (*qpix_op)[16])

  973. {

  974. #if !CONFIG_SMALL

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

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

  977.                             ref_picture, pix_op, qpix_op, 1);

  978.     else

  979. #endif

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

  981.                             ref_picture, pix_op, qpix_op, 0);

  982. }