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FFmpeg/libavcodec/mpegvideo_motion.c

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  1. /*

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

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

  4.  *

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

  6.  *

  7.  * This file is part of FFmpeg.

  8.  *

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

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

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

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

  13.  *

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

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

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

  17.  * Lesser General Public License for more details.

  18.  *

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

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

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

  22.  */

  23. 

  24. #include <string.h>

  25. 

  26. #include "libavutil/avassert.h"

  27. #include "libavutil/internal.h"

  28. #include "avcodec.h"

  29. #include "h261.h"

  30. #include "mpegutils.h"

  31. #include "mpegvideo.h"

  32. #include "mjpegenc.h"

  33. #include "msmpeg4.h"

  34. #include "qpeldsp.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->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->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 & 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->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->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->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->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 & 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) >> 1, (s->v_edge_pos + 1) >> 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) >> 1, (s->v_edge_pos + 1) >> 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 ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 1) - 7, 0) ||

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

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

  216.                                      s->linesize, s->linesize,

  217.                                      9, 9,

  218.                                      src_x, src_y,

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

  220.             src = s->edge_emu_buffer;

  221.             emu = 1;

  222.         }

  223.     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) - 15   , 0) ||

  310.         (unsigned)src_y >= FFMAX(   v_edge_pos - (motion_y & 1) - h + 1, 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.         src_y = (unsigned)src_y << field_based;

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

  321.                                  s->linesize, s->linesize,

  322.                                  17, 17 + field_based,

  323.                                  src_x, src_y,

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

  325.         ptr_y = s->edge_emu_buffer;

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

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

  328.             uint8_t *vbuf = ubuf + 9 * s->uvlinesize;

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

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

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

  332.                                      9, 9 + field_based,

  333.                                      uvsrc_x, uvsrc_y,

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

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

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

  337.                                      9, 9 + field_based,

  338.                                      uvsrc_x, uvsrc_y,

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

  340.             ptr_cb = ubuf;

  341.             ptr_cr = vbuf;

  342.         }

  343.     }

  344. 

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

  346.      * changes picture.data */

  347.     if (bottom_field) {

  348.         dest_y  += s->linesize;

  349.         dest_cb += s->uvlinesize;

  350.         dest_cr += s->uvlinesize;

  351.     }

  352. 

  353.     if (field_select) {

  354.         ptr_y  += s->linesize;

  355.         ptr_cb += s->uvlinesize;

  356.         ptr_cr += s->uvlinesize;

  357.     }

  358. 

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

  360. 

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

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

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

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

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

  366.     }

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

  368.         s->out_format == FMT_H261) {

  369.         ff_h261_loop_filter(s);

  370.     }

  371. }

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

  373. static void mpeg_motion(MpegEncContext *s,

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

  375.                         int field_select, uint8_t **ref_picture,

  376.                         op_pixels_func (*pix_op)[4],

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

  378. {

  379. #if !CONFIG_SMALL

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

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

  382.                              field_select, ref_picture, pix_op,

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

  384.     else

  385. #endif

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

  387.                              field_select, ref_picture, pix_op,

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

  389. }

  390. 

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

  392.                               uint8_t *dest_cb, uint8_t *dest_cr,

  393.                               int bottom_field, int field_select,

  394.                               uint8_t **ref_picture,

  395.                               op_pixels_func (*pix_op)[4],

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

  397. {

  398. #if !CONFIG_SMALL

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

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

  401.                              bottom_field, field_select, ref_picture, pix_op,

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

  403.     else

  404. #endif

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

  406.                              bottom_field, field_select, ref_picture, pix_op,

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

  408. }

  409. 

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

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

  412. {

  413.     int x;

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

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

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

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

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

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

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

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

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

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

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

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

  426. 

  427.     x = 0;

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

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

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

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

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

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

  434.     x += stride;

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

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

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

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

  439.     x += stride;

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

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

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

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

  444.     x += 2 * stride;

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

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

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

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

  449.     x += 2*stride;

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

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

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

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

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

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

  456.     x += stride;

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

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

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

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

  461. }

  462. 

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

  464. static inline void obmc_motion(MpegEncContext *s,

  465.                                uint8_t *dest, uint8_t *src,

  466.                                int src_x, int src_y,

  467.                                op_pixels_func *pix_op,

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

  469. #define MID    0

  470. {

  471.     int i;

  472.     uint8_t *ptr[5];

  473. 

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

  475. 

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

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

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

  479.         } else {

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

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

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

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

  484.         }

  485.     }

  486. 

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

  488. }

  489. 

  490. static inline void qpel_motion(MpegEncContext *s,

  491.                                uint8_t *dest_y,

  492.                                uint8_t *dest_cb,

  493.                                uint8_t *dest_cr,

  494.                                int field_based, int bottom_field,

  495.                                int field_select, uint8_t **ref_picture,

  496.                                op_pixels_func (*pix_op)[4],

  497.                                qpel_mc_func (*qpix_op)[16],

  498.                                int motion_x, int motion_y, int h)

  499. {

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

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

  502.     ptrdiff_t linesize, uvlinesize;

  503. 

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

  505. 

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

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

  508. 

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

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

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

  512. 

  513.     if (field_based) {

  514.         mx = motion_x / 2;

  515.         my = motion_y >> 1;

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

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

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

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

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

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

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

  523.     } else {

  524.         mx = motion_x / 2;

  525.         my = motion_y / 2;

  526.     }

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

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

  529. 

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

  531.     mx  >>= 1;

  532.     my  >>= 1;

  533. 

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

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

  536. 

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

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

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

  540. 

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

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

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

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

  545.                                  17, 17 + field_based,

  546.                                  src_x, src_y << field_based,

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

  548.         ptr_y = s->edge_emu_buffer;

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

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

  551.             uint8_t *vbuf = ubuf + 9 * s->uvlinesize;

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

  553.                                      s->uvlinesize, 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(vbuf, ptr_cr,

  558.                                      s->uvlinesize, 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 = ubuf;

  563.             ptr_cr = vbuf;

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

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

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

  628.                                  s->uvlinesize, s->uvlinesize,

  629.                                  9, 9, src_x, src_y,

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

  631.         ptr = s->edge_emu_buffer;

  632.         emu = 1;

  633.     }

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

  635. 

  636.     ptr = ref_picture[2] + offset;

  637.     if (emu) {

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

  639.                                  s->uvlinesize, s->uvlinesize,

  640.                                  9, 9, src_x, src_y,

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

  642.         ptr = s->edge_emu_buffer;

  643.     }

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

  645. }

  646. 

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

  648. {

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

  650.      * optimized for 64byte cache lines */

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

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

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

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

  655. 

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

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

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

  659. }

  660. 

  661. static inline void apply_obmc(MpegEncContext *s,

  662.                               uint8_t *dest_y,

  663.                               uint8_t *dest_cb,

  664.                               uint8_t *dest_cr,

  665.                               uint8_t **ref_picture,

  666.                               op_pixels_func (*pix_op)[4])

  667. {

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

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

  670.     int mb_x = s->mb_x;

  671.     int mb_y = s->mb_y;

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

  673.     const int mot_stride = s->b8_stride;

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

  675.     int mx, my, i;

  676. 

  677.     av_assert2(!s->mb_skipped);

  678. 

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

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

  681. 

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

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

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

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

  686. 

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

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

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

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

  691. 

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

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

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

  695.     } else {

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

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

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

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

  700.     }

  701. 

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

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

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

  705.     } else {

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

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

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

  709.     }

  710. 

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

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

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

  714.     } else {

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

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

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

  718.     }

  719. 

  720.     mx = 0;

  721.     my = 0;

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

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

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

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

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

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

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

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

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

  731.         };

  732.         // FIXME cleanup

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

  734.                     ref_picture[0],

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

  736.                     pix_op[1],

  737.                     mv);

  738. 

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

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

  741.     }

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

  743.         chroma_4mv_motion(s, dest_cb, dest_cr,

  744.                           ref_picture, pix_op[1],

  745.                           mx, my);

  746. }

  747. 

  748. static inline void apply_8x8(MpegEncContext *s,

  749.                              uint8_t *dest_y,

  750.                              uint8_t *dest_cb,

  751.                              uint8_t *dest_cr,

  752.                              int dir,

  753.                              uint8_t **ref_picture,

  754.                              qpel_mc_func (*qpix_op)[16],

  755.                              op_pixels_func (*pix_op)[4])

  756. {

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

  758.     int i;

  759.     int mb_x = s->mb_x;

  760.     int mb_y = s->mb_y;

  761.     uint8_t *ptr, *dest;

  762. 

  763.     mx = 0;

  764.     my = 0;

  765.     if (s->quarter_sample) {

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

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

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

  769. 

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

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

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

  773. 

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

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

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

  777.                 dxy &= ~3;

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

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

  780.                 dxy &= ~12;

  781. 

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

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

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

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

  786.                                          s->linesize, s->linesize,

  787.                                          9, 9,

  788.                                          src_x, src_y,

  789.                                          s->h_edge_pos,

  790.                                          s->v_edge_pos);

  791.                 ptr = s->edge_emu_buffer;

  792.             }

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

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

  795. 

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

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

  798.         }

  799.     } else {

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

  801.             hpel_motion(s,

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

  803.                         ref_picture[0],

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

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

  806.                         pix_op[1],

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

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

  809. 

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

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

  812.         }

  813.     }

  814. 

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

  816.         chroma_4mv_motion(s, dest_cb, dest_cr,

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

  818. }

  819. 

  820. /**

  821.  * motion compensation of a single macroblock

  822.  * @param s context

  823.  * @param dest_y luma destination pointer

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

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

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

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

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

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

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

  831.  */

  832. static av_always_inline void mpv_motion_internal(MpegEncContext *s,

  833.                                                  uint8_t *dest_y,

  834.                                                  uint8_t *dest_cb,

  835.                                                  uint8_t *dest_cr,

  836.                                                  int dir,

  837.                                                  uint8_t **ref_picture,

  838.                                                  op_pixels_func (*pix_op)[4],

  839.                                                  qpel_mc_func (*qpix_op)[16],

  840.                                                  int is_mpeg12)

  841. {

  842.     int i;

  843.     int mb_y = s->mb_y;

  844. 

  845.     prefetch_motion(s, ref_picture, dir);

  846. 

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

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

  849.         return;

  850.     }

  851. 

  852.     switch (s->mv_type) {

  853.     case MV_TYPE_16X16:

  854.         if (s->mcsel) {

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

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

  857.                             ref_picture);

  858.             } else {

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

  860.                            ref_picture);

  861.             }

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

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

  864.                         0, 0, 0,

  865.                         ref_picture, pix_op, qpix_op,

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

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

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

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

  870.                             ref_picture, pix_op,

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

  872.         } else {

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

  874.                         ref_picture, pix_op,

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

  876.         }

  877.         break;

  878.     case MV_TYPE_8X8:

  879.         if (!is_mpeg12)

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

  881.                       dir, ref_picture, qpix_op, pix_op);

  882.         break;

  883.     case MV_TYPE_FIELD:

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

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

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

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

  888.                                 1, i, s->field_select[dir][i],

  889.                                 ref_picture, pix_op, qpix_op,

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

  891.             } else {

  892.                 /* top field */

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

  894.                                   0, s->field_select[dir][0],

  895.                                   ref_picture, pix_op,

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

  897.                 /* bottom field */

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

  899.                                   1, s->field_select[dir][1],

  900.                                   ref_picture, pix_op,

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

  902.             }

  903.         } else {

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

  905.                 || !ref_picture[0]) {

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

  907.             }

  908. 

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

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

  911.                         ref_picture, pix_op,

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

  913.         }

  914.         break;

  915.     case MV_TYPE_16X8:

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

  917.             uint8_t **ref2picture;

  918. 

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

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

  921.                 ref2picture = ref_picture;

  922.             } else {

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

  924.             }

  925. 

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

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

  928.                         ref2picture, pix_op,

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

  930.                         8, mb_y >> 1);

  931. 

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

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

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

  935.         }

  936.         break;

  937.     case MV_TYPE_DMV:

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

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

  940.                 int j;

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

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

  943.                                       j, j ^ i, ref_picture, pix_op,

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

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

  946.                 pix_op = s->hdsp.avg_pixels_tab;

  947.             }

  948.         } else {

  949.             if (!ref_picture[0]) {

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

  951.             }

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

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

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

  955.                             ref_picture, pix_op,

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

  957.                             16, mb_y >> 1);

  958. 

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

  960.                 pix_op = s->hdsp.avg_pixels_tab;

  961. 

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

  963.                  * second field */

  964.                 if (!s->first_field) {

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

  966.                 }

  967.             }

  968.         }

  969.         break;

  970.     default: av_assert2(0);

  971.     }

  972. }

  973. 

  974. void ff_mpv_motion(MpegEncContext *s,

  975.                    uint8_t *dest_y, uint8_t *dest_cb,

  976.                    uint8_t *dest_cr, int dir,

  977.                    uint8_t **ref_picture,

  978.                    op_pixels_func (*pix_op)[4],

  979.                    qpel_mc_func (*qpix_op)[16])

  980. {

  981. #if !CONFIG_SMALL

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

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

  984.                             ref_picture, pix_op, qpix_op, 1);

  985.     else

  986. #endif

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

  988.                             ref_picture, pix_op, qpix_op, 0);

  989. }