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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 "h261.h"

  29. #include "mpegutils.h"

  30. #include "mpegvideo.h"

  31. #include "mjpegenc.h"

  32. #include "msmpeg4.h"

  33. #include "qpeldsp.h"

  34. #include "wmv2.h"

  35. #include <limits.h>

  36. 

  37. static void gmc1_motion(MpegEncContext *s,

  38.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  39.                         uint8_t **ref_picture)

  40. {

  41.     uint8_t *ptr;

  42.     int src_x, src_y, motion_x, motion_y;

  43.     ptrdiff_t offset, linesize, uvlinesize;

  44.     int emu = 0;

  45. 

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

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

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

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

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

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

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

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

  54.         motion_x = 0;

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

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

  57.         motion_y = 0;

  58. 

  59.     linesize   = s->linesize;

  60.     uvlinesize = s->uvlinesize;

  61. 

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

  63. 

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

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

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

  67.                                  linesize, linesize,

  68.                                  17, 17,

  69.                                  src_x, src_y,

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

  71.         ptr = s->sc.edge_emu_buffer;

  72.     }

  73. 

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

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

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

  77.         s->mdsp.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->avctx->flags & AV_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 ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - 9, 0) ||

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

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

  111.                                  uvlinesize, uvlinesize,

  112.                                  9, 9,

  113.                                  src_x, src_y,

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

  115.         ptr = s->sc.edge_emu_buffer;

  116.         emu = 1;

  117.     }

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

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

  120. 

  121.     ptr = ref_picture[2] + offset;

  122.     if (emu) {

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

  124.                                  uvlinesize, uvlinesize,

  125.                                  9, 9,

  126.                                  src_x, src_y,

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

  128.         ptr = s->sc.edge_emu_buffer;

  129.     }

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

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

  132. }

  133. 

  134. static void gmc_motion(MpegEncContext *s,

  135.                        uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  136.                        uint8_t **ref_picture)

  137. {

  138.     uint8_t *ptr;

  139.     int linesize, uvlinesize;

  140.     const int a = s->sprite_warping_accuracy;

  141.     int ox, oy;

  142. 

  143.     linesize   = s->linesize;

  144.     uvlinesize = s->uvlinesize;

  145. 

  146.     ptr = ref_picture[0];

  147. 

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

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

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

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

  152. 

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

  154.                 ox, oy,

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

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

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

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

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

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

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

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

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

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

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

  166. 

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

  168.         return;

  169. 

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

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

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

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

  174. 

  175.     ptr = ref_picture[1];

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

  177.                 ox, oy,

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

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

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

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

  182. 

  183.     ptr = ref_picture[2];

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

  185.                 ox, oy,

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

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

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

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

  190. }

  191. 

  192. static inline int hpel_motion(MpegEncContext *s,

  193.                               uint8_t *dest, uint8_t *src,

  194.                               int src_x, int src_y,

  195.                               op_pixels_func *pix_op,

  196.                               int motion_x, int motion_y)

  197. {

  198.     int dxy = 0;

  199.     int emu = 0;

  200. 

  201.     src_x += motion_x >> 1;

  202.     src_y += motion_y >> 1;

  203. 

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

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

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

  207.         dxy |= motion_x & 1;

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

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

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

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

  212. 

  213.     if (s->unrestricted_mv) {

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

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

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

  217.                                      s->linesize, s->linesize,

  218.                                      9, 9,

  219.                                      src_x, src_y, s->h_edge_pos,

  220.                                      s->v_edge_pos);

  221.             src = s->sc.edge_emu_buffer;

  222.             emu = 1;

  223.         }

  224.     }

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

  226.     return emu;

  227. }

  228. 

  229. static av_always_inline

  230. void mpeg_motion_internal(MpegEncContext *s,

  231.                           uint8_t *dest_y,

  232.                           uint8_t *dest_cb,

  233.                           uint8_t *dest_cr,

  234.                           int field_based,

  235.                           int bottom_field,

  236.                           int field_select,

  237.                           uint8_t **ref_picture,

  238.                           op_pixels_func (*pix_op)[4],

  239.                           int motion_x,

  240.                           int motion_y,

  241.                           int h,

  242.                           int is_mpeg12,

  243.                           int mb_y)

  244. {

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

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

  247.         uvsrc_x, uvsrc_y, v_edge_pos;

  248.     ptrdiff_t uvlinesize, linesize;

  249. 

  250. #if 0

  251.     if (s->quarter_sample) {

  252.         motion_x >>= 1;

  253.         motion_y >>= 1;

  254.     }

  255. #endif

  256. 

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

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

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

  260. 

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

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

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

  264. 

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

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

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

  268.             my      = motion_y >> 1;

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

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

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

  272.         } else {

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

  274.             uvsrc_x = src_x >> 1;

  275.             uvsrc_y = src_y >> 1;

  276.         }

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

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

  279.         mx      = motion_x / 4;

  280.         my      = motion_y / 4;

  281.         uvdxy   = 0;

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

  283.         uvsrc_y = mb_y * 8 + my;

  284.     } else {

  285.         if (s->chroma_y_shift) {

  286.             mx      = motion_x / 2;

  287.             my      = motion_y / 2;

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

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

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

  291.         } else {

  292.             if (s->chroma_x_shift) {

  293.                 // Chroma422

  294.                 mx      = motion_x / 2;

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

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

  297.                 uvsrc_y = src_y;

  298.             } else {

  299.                 // Chroma444

  300.                 uvdxy   = dxy;

  301.                 uvsrc_x = src_x;

  302.                 uvsrc_y = src_y;

  303.             }

  304.         }

  305.     }

  306. 

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

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

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

  310. 

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

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

  313.         if (is_mpeg12 ||

  314.             s->codec_id == AV_CODEC_ID_MPEG2VIDEO ||

  315.             s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {

  316.             av_log(s->avctx, AV_LOG_DEBUG,

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

  318.                    src_y);

  319.             return;

  320.         }

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

  322.                                  s->linesize, s->linesize,

  323.                                  17, 17 + field_based,

  324.                                  src_x, src_y << field_based,

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

  326.         ptr_y = s->sc.edge_emu_buffer;

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

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

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

  330.                                      s->uvlinesize, s->uvlinesize,

  331.                                      9, 9 + field_based,

  332.                                      uvsrc_x, uvsrc_y << field_based,

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

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

  335.                                      s->uvlinesize, s->uvlinesize,

  336.                                      9, 9 + field_based,

  337.                                      uvsrc_x, uvsrc_y << field_based,

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

  339.             ptr_cb = uvbuf;

  340.             ptr_cr = uvbuf + 16;

  341.         }

  342.     }

  343. 

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

  345.      * changes picture.data */

  346.     if (bottom_field) {

  347.         dest_y  += s->linesize;

  348.         dest_cb += s->uvlinesize;

  349.         dest_cr += s->uvlinesize;

  350.     }

  351. 

  352.     if (field_select) {

  353.         ptr_y  += s->linesize;

  354.         ptr_cb += s->uvlinesize;

  355.         ptr_cr += s->uvlinesize;

  356.     }

  357. 

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

  359. 

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

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

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

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

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

  365.     }

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

  367.         s->out_format == FMT_H261) {

  368.         ff_h261_loop_filter(s);

  369.     }

  370. }

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

  372. static void mpeg_motion(MpegEncContext *s,

  373.                         uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  374.                         int field_select, uint8_t **ref_picture,

  375.                         op_pixels_func (*pix_op)[4],

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

  377. {

  378. #if !CONFIG_SMALL

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

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

  381.                              field_select, ref_picture, pix_op,

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

  383.     else

  384. #endif

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

  386.                              field_select, ref_picture, pix_op,

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

  388. }

  389. 

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

  391.                               uint8_t *dest_cb, uint8_t *dest_cr,

  392.                               int bottom_field, int field_select,

  393.                               uint8_t **ref_picture,

  394.                               op_pixels_func (*pix_op)[4],

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

  396. {

  397. #if !CONFIG_SMALL

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

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

  400.                              bottom_field, field_select, ref_picture, pix_op,

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

  402.     else

  403. #endif

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

  405.                              bottom_field, field_select, ref_picture, pix_op,

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

  407. }

  408. 

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

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

  411. {

  412.     int x;

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

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

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

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

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

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

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

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

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

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

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

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

  425. 

  426.     x = 0;

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

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

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

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

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

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

  433.     x += stride;

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

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

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

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

  438.     x += stride;

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

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

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

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

  443.     x += 2 * stride;

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

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

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

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

  448.     x += 2*stride;

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

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

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

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

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

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

  455.     x += stride;

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

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

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

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

  460. }

  461. 

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

  463. static inline void obmc_motion(MpegEncContext *s,

  464.                                uint8_t *dest, uint8_t *src,

  465.                                int src_x, int src_y,

  466.                                op_pixels_func *pix_op,

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

  468. #define MID    0

  469. {

  470.     int i;

  471.     uint8_t *ptr[5];

  472. 

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

  474. 

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

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

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

  478.         } else {

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

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

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

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

  483.         }

  484.     }

  485. 

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

  487. }

  488. 

  489. static inline void qpel_motion(MpegEncContext *s,

  490.                                uint8_t *dest_y,

  491.                                uint8_t *dest_cb,

  492.                                uint8_t *dest_cr,

  493.                                int field_based, int bottom_field,

  494.                                int field_select, uint8_t **ref_picture,

  495.                                op_pixels_func (*pix_op)[4],

  496.                                qpel_mc_func (*qpix_op)[16],

  497.                                int motion_x, int motion_y, int h)

  498. {

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

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

  501.     ptrdiff_t linesize, uvlinesize;

  502. 

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

  504. 

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

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

  507. 

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

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

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

  511. 

  512.     if (field_based) {

  513.         mx = motion_x / 2;

  514.         my = motion_y >> 1;

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

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

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

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

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

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

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

  522.     } else {

  523.         mx = motion_x / 2;

  524.         my = motion_y / 2;

  525.     }

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

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

  528. 

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

  530.     mx  >>= 1;

  531.     my  >>= 1;

  532. 

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

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

  535. 

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

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

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

  539. 

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

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

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

  543.                                  s->linesize, 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->sc.edge_emu_buffer;

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

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

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

  551.                                      s->uvlinesize, s->uvlinesize,

  552.                                      9, 9 + field_based,

  553.                                      uvsrc_x, uvsrc_y << field_based,

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

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

  556.                                      s->uvlinesize, s->uvlinesize,

  557.                                      9, 9 + field_based,

  558.                                      uvsrc_x, uvsrc_y << field_based,

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

  560.             ptr_cb = uvbuf;

  561.             ptr_cr = uvbuf + 16;

  562.         }

  563.     }

  564. 

  565.     if (!field_based)

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

  567.     else {

  568.         if (bottom_field) {

  569.             dest_y  += s->linesize;

  570.             dest_cb += s->uvlinesize;

  571.             dest_cr += s->uvlinesize;

  572.         }

  573. 

  574.         if (field_select) {

  575.             ptr_y  += s->linesize;

  576.             ptr_cb += s->uvlinesize;

  577.             ptr_cr += s->uvlinesize;

  578.         }

  579.         // damn interlaced mode

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

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

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

  583.     }

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

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

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

  587.     }

  588. }

  589. 

  590. /**

  591.  * h263 chroma 4mv motion compensation.

  592.  */

  593. static void chroma_4mv_motion(MpegEncContext *s,

  594.                               uint8_t *dest_cb, uint8_t *dest_cr,

  595.                               uint8_t **ref_picture,

  596.                               op_pixels_func *pix_op,

  597.                               int mx, int my)

  598. {

  599.     uint8_t *ptr;

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

  601.     ptrdiff_t offset;

  602. 

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

  604.      * with a special rounding */

  605.     mx = ff_h263_round_chroma(mx);

  606.     my = ff_h263_round_chroma(my);

  607. 

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

  609.     mx >>= 1;

  610.     my >>= 1;

  611. 

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

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

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

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

  616.         dxy &= ~1;

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

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

  619.         dxy &= ~2;

  620. 

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

  622.     ptr    = ref_picture[1] + offset;

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

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

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

  626.                                  s->uvlinesize, s->uvlinesize,

  627.                                  9, 9, src_x, src_y,

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

  629.         ptr = s->sc.edge_emu_buffer;

  630.         emu = 1;

  631.     }

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

  633. 

  634.     ptr = ref_picture[2] + offset;

  635.     if (emu) {

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

  637.                                  s->uvlinesize, s->uvlinesize,

  638.                                  9, 9, src_x, src_y,

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

  640.         ptr = s->sc.edge_emu_buffer;

  641.     }

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

  643. }

  644. 

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

  646. {

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

  648.      * optimized for 64byte cache lines */

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

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

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

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

  653. 

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

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

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

  657. }

  658. 

  659. static inline void apply_obmc(MpegEncContext *s,

  660.                               uint8_t *dest_y,

  661.                               uint8_t *dest_cb,

  662.                               uint8_t *dest_cr,

  663.                               uint8_t **ref_picture,

  664.                               op_pixels_func (*pix_op)[4])

  665. {

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

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

  668.     int mb_x = s->mb_x;

  669.     int mb_y = s->mb_y;

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

  671.     const int mot_stride = s->b8_stride;

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

  673.     int mx, my, i;

  674. 

  675.     assert(!s->mb_skipped);

  676. 

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

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

  679. 

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

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

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

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

  684. 

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

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

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

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

  689. 

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

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

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

  693.     } else {

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

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

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

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

  698.     }

  699. 

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

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

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

  703.     } else {

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

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

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

  707.     }

  708. 

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

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

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

  712.     } else {

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

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

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

  716.     }

  717. 

  718.     mx = 0;

  719.     my = 0;

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

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

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

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

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

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

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

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

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

  729.         };

  730.         // FIXME cleanup

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

  732.                     ref_picture[0],

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

  734.                     pix_op[1],

  735.                     mv);

  736. 

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

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

  739.     }

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

  741.         chroma_4mv_motion(s, dest_cb, dest_cr,

  742.                           ref_picture, pix_op[1],

  743.                           mx, my);

  744. }

  745. 

  746. static inline void apply_8x8(MpegEncContext *s,

  747.                              uint8_t *dest_y,

  748.                              uint8_t *dest_cb,

  749.                              uint8_t *dest_cr,

  750.                              int dir,

  751.                              uint8_t **ref_picture,

  752.                              qpel_mc_func (*qpix_op)[16],

  753.                              op_pixels_func (*pix_op)[4])

  754. {

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

  756.     int i;

  757.     int mb_x = s->mb_x;

  758.     int mb_y = s->mb_y;

  759.     uint8_t *ptr, *dest;

  760. 

  761.     mx = 0;

  762.     my = 0;

  763.     if (s->quarter_sample) {

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

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

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

  767. 

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

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

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

  771. 

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

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

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

  775.                 dxy &= ~3;

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

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

  778.                 dxy &= ~12;

  779. 

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

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

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

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

  784.                                          s->linesize, s->linesize,

  785.                                          9, 9,

  786.                                          src_x, src_y,

  787.                                          s->h_edge_pos,

  788.                                          s->v_edge_pos);

  789.                 ptr = s->sc.edge_emu_buffer;

  790.             }

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

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

  793. 

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

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

  796.         }

  797.     } else {

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

  799.             hpel_motion(s,

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

  801.                         ref_picture[0],

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

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

  804.                         pix_op[1],

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

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

  807. 

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

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

  810.         }

  811.     }

  812. 

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

  814.         chroma_4mv_motion(s, dest_cb, dest_cr,

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

  816. }

  817. 

  818. /**

  819.  * motion compensation of a single macroblock

  820.  * @param s context

  821.  * @param dest_y luma destination pointer

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

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

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

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

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

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

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

  829.  */

  830. static av_always_inline void mpv_motion_internal(MpegEncContext *s,

  831.                                                  uint8_t *dest_y,

  832.                                                  uint8_t *dest_cb,

  833.                                                  uint8_t *dest_cr,

  834.                                                  int dir,

  835.                                                  uint8_t **ref_picture,

  836.                                                  op_pixels_func (*pix_op)[4],

  837.                                                  qpel_mc_func (*qpix_op)[16],

  838.                                                  int is_mpeg12)

  839. {

  840.     int i;

  841.     int mb_y = s->mb_y;

  842. 

  843.     prefetch_motion(s, ref_picture, dir);

  844. 

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

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

  847.         return;

  848.     }

  849. 

  850.     switch (s->mv_type) {

  851.     case MV_TYPE_16X16:

  852.         if (s->mcsel) {

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

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

  855.                             ref_picture);

  856.             } else {

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

  858.                            ref_picture);

  859.             }

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

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

  862.                         0, 0, 0,

  863.                         ref_picture, pix_op, qpix_op,

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

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

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

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

  868.                             ref_picture, pix_op,

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

  870.         } else {

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

  872.                         ref_picture, pix_op,

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

  874.         }

  875.         break;

  876.     case MV_TYPE_8X8:

  877.         if (!is_mpeg12)

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

  879.                       dir, ref_picture, qpix_op, pix_op);

  880.         break;

  881.     case MV_TYPE_FIELD:

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

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

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

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

  886.                                 1, i, s->field_select[dir][i],

  887.                                 ref_picture, pix_op, qpix_op,

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

  889.             } else {

  890.                 /* top field */

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

  892.                                   0, s->field_select[dir][0],

  893.                                   ref_picture, pix_op,

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

  895.                 /* bottom field */

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

  897.                                   1, s->field_select[dir][1],

  898.                                   ref_picture, pix_op,

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

  900.             }

  901.         } else {

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

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

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

  905.             }

  906. 

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

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

  909.                         ref_picture, pix_op,

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

  911.         }

  912.         break;

  913.     case MV_TYPE_16X8:

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

  915.             uint8_t **ref2picture;

  916. 

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

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

  919.                 ref2picture = ref_picture;

  920.             } else {

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

  922.             }

  923. 

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

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

  926.                         ref2picture, pix_op,

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

  928.                         8, mb_y >> 1);

  929. 

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

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

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

  933.         }

  934.         break;

  935.     case MV_TYPE_DMV:

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

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

  938.                 int j;

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

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

  941.                                       j, j ^ i, ref_picture, pix_op,

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

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

  944.                 pix_op = s->hdsp.avg_pixels_tab;

  945.             }

  946.         } else {

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

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

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

  950.                             ref_picture, pix_op,

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

  952.                             16, mb_y >> 1);

  953. 

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

  955.                 pix_op = s->hdsp.avg_pixels_tab;

  956. 

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

  958.                  * second field */

  959.                 if (!s->first_field) {

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

  961.                 }

  962.             }

  963.         }

  964.         break;

  965.     default: assert(0);

  966.     }

  967. }

  968. 

  969. void ff_mpv_motion(MpegEncContext *s,

  970.                    uint8_t *dest_y, uint8_t *dest_cb,

  971.                    uint8_t *dest_cr, int dir,

  972.                    uint8_t **ref_picture,

  973.                    op_pixels_func (*pix_op)[4],

  974.                    qpel_mc_func (*qpix_op)[16])

  975. {

  976. #if !CONFIG_SMALL

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

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

  979.                             ref_picture, pix_op, qpix_op, 1);

  980.     else

  981. #endif

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

  983.                             ref_picture, pix_op, qpix_op, 0);

  984. }