FFmpeg
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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->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->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) - 8, 0) ||
214  (unsigned)src_y > FFMAX(s->v_edge_pos - (motion_y & 1) - 8, 0)) {
215  s->vdsp.emulated_edge_mc(s->edge_emu_buffer, 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) - 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 *ubuf = s->edge_emu_buffer + 18 * s->linesize;
327  uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
328  s->vdsp.emulated_edge_mc(ubuf, ptr_cb,
329  s->uvlinesize, s->uvlinesize,
330  9, 9 + field_based,
331  uvsrc_x, uvsrc_y << field_based,
332  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
333  s->vdsp.emulated_edge_mc(vbuf, ptr_cr,
334  s->uvlinesize, s->uvlinesize,
335  9, 9 + field_based,
336  uvsrc_x, uvsrc_y << field_based,
337  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
338  ptr_cb = ubuf;
339  ptr_cr = vbuf;
340  }
341  }
342 
343  /* FIXME use this for field pix too instead of the obnoxious hack which
344  * changes picture.data */
345  if (bottom_field) {
346  dest_y += s->linesize;
347  dest_cb += s->uvlinesize;
348  dest_cr += s->uvlinesize;
349  }
350 
351  if (field_select) {
352  ptr_y += s->linesize;
353  ptr_cb += s->uvlinesize;
354  ptr_cr += s->uvlinesize;
355  }
356 
357  pix_op[0][dxy](dest_y, ptr_y, linesize, h);
358 
359  if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
360  pix_op[s->chroma_x_shift][uvdxy]
361  (dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);
362  pix_op[s->chroma_x_shift][uvdxy]
363  (dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift);
364  }
365  if (!is_mpeg12 && (CONFIG_H261_ENCODER || CONFIG_H261_DECODER) &&
366  s->out_format == FMT_H261) {
367  ff_h261_loop_filter(s);
368  }
369 }
370 /* apply one mpeg motion vector to the three components */
371 static void mpeg_motion(MpegEncContext *s,
372  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
373  int field_select, uint8_t **ref_picture,
374  op_pixels_func (*pix_op)[4],
375  int motion_x, int motion_y, int h, int mb_y)
376 {
377 #if !CONFIG_SMALL
378  if (s->out_format == FMT_MPEG1)
379  mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 0, 0,
380  field_select, ref_picture, pix_op,
381  motion_x, motion_y, h, 1, mb_y);
382  else
383 #endif
384  mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 0, 0,
385  field_select, ref_picture, pix_op,
386  motion_x, motion_y, h, 0, mb_y);
387 }
388 
389 static void mpeg_motion_field(MpegEncContext *s, uint8_t *dest_y,
390  uint8_t *dest_cb, uint8_t *dest_cr,
391  int bottom_field, int field_select,
392  uint8_t **ref_picture,
393  op_pixels_func (*pix_op)[4],
394  int motion_x, int motion_y, int h, int mb_y)
395 {
396 #if !CONFIG_SMALL
397  if (s->out_format == FMT_MPEG1)
398  mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 1,
399  bottom_field, field_select, ref_picture, pix_op,
400  motion_x, motion_y, h, 1, mb_y);
401  else
402 #endif
403  mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 1,
404  bottom_field, field_select, ref_picture, pix_op,
405  motion_x, motion_y, h, 0, mb_y);
406 }
407 
408 // FIXME: SIMDify, avg variant, 16x16 version
409 static inline void put_obmc(uint8_t *dst, uint8_t *src[5], int stride)
410 {
411  int x;
412  uint8_t *const top = src[1];
413  uint8_t *const left = src[2];
414  uint8_t *const mid = src[0];
415  uint8_t *const right = src[3];
416  uint8_t *const bottom = src[4];
417 #define OBMC_FILTER(x, t, l, m, r, b)\
418  dst[x]= (t*top[x] + l*left[x] + m*mid[x] + r*right[x] + b*bottom[x] + 4)>>3
419 #define OBMC_FILTER4(x, t, l, m, r, b)\
420  OBMC_FILTER(x , t, l, m, r, b);\
421  OBMC_FILTER(x+1 , t, l, m, r, b);\
422  OBMC_FILTER(x +stride, t, l, m, r, b);\
423  OBMC_FILTER(x+1+stride, t, l, m, r, b);
424 
425  x = 0;
426  OBMC_FILTER (x , 2, 2, 4, 0, 0);
427  OBMC_FILTER (x + 1, 2, 1, 5, 0, 0);
428  OBMC_FILTER4(x + 2, 2, 1, 5, 0, 0);
429  OBMC_FILTER4(x + 4, 2, 0, 5, 1, 0);
430  OBMC_FILTER (x + 6, 2, 0, 5, 1, 0);
431  OBMC_FILTER (x + 7, 2, 0, 4, 2, 0);
432  x += stride;
433  OBMC_FILTER (x , 1, 2, 5, 0, 0);
434  OBMC_FILTER (x + 1, 1, 2, 5, 0, 0);
435  OBMC_FILTER (x + 6, 1, 0, 5, 2, 0);
436  OBMC_FILTER (x + 7, 1, 0, 5, 2, 0);
437  x += stride;
438  OBMC_FILTER4(x , 1, 2, 5, 0, 0);
439  OBMC_FILTER4(x + 2, 1, 1, 6, 0, 0);
440  OBMC_FILTER4(x + 4, 1, 0, 6, 1, 0);
441  OBMC_FILTER4(x + 6, 1, 0, 5, 2, 0);
442  x += 2 * stride;
443  OBMC_FILTER4(x , 0, 2, 5, 0, 1);
444  OBMC_FILTER4(x + 2, 0, 1, 6, 0, 1);
445  OBMC_FILTER4(x + 4, 0, 0, 6, 1, 1);
446  OBMC_FILTER4(x + 6, 0, 0, 5, 2, 1);
447  x += 2*stride;
448  OBMC_FILTER (x , 0, 2, 5, 0, 1);
449  OBMC_FILTER (x + 1, 0, 2, 5, 0, 1);
450  OBMC_FILTER4(x + 2, 0, 1, 5, 0, 2);
451  OBMC_FILTER4(x + 4, 0, 0, 5, 1, 2);
452  OBMC_FILTER (x + 6, 0, 0, 5, 2, 1);
453  OBMC_FILTER (x + 7, 0, 0, 5, 2, 1);
454  x += stride;
455  OBMC_FILTER (x , 0, 2, 4, 0, 2);
456  OBMC_FILTER (x + 1, 0, 1, 5, 0, 2);
457  OBMC_FILTER (x + 6, 0, 0, 5, 1, 2);
458  OBMC_FILTER (x + 7, 0, 0, 4, 2, 2);
459 }
460 
461 /* obmc for 1 8x8 luma block */
462 static inline void obmc_motion(MpegEncContext *s,
463  uint8_t *dest, uint8_t *src,
464  int src_x, int src_y,
465  op_pixels_func *pix_op,
466  int16_t mv[5][2] /* mid top left right bottom */)
467 #define MID 0
468 {
469  int i;
470  uint8_t *ptr[5];
471 
472  av_assert2(s->quarter_sample == 0);
473 
474  for (i = 0; i < 5; i++) {
475  if (i && mv[i][0] == mv[MID][0] && mv[i][1] == mv[MID][1]) {
476  ptr[i] = ptr[MID];
477  } else {
478  ptr[i] = s->obmc_scratchpad + 8 * (i & 1) +
479  s->linesize * 8 * (i >> 1);
480  hpel_motion(s, ptr[i], src, src_x, src_y, pix_op,
481  mv[i][0], mv[i][1]);
482  }
483  }
484 
485  put_obmc(dest, ptr, s->linesize);
486 }
487 
488 static inline void qpel_motion(MpegEncContext *s,
489  uint8_t *dest_y,
490  uint8_t *dest_cb,
491  uint8_t *dest_cr,
492  int field_based, int bottom_field,
493  int field_select, uint8_t **ref_picture,
494  op_pixels_func (*pix_op)[4],
495  qpel_mc_func (*qpix_op)[16],
496  int motion_x, int motion_y, int h)
497 {
498  uint8_t *ptr_y, *ptr_cb, *ptr_cr;
499  int dxy, uvdxy, mx, my, src_x, src_y, uvsrc_x, uvsrc_y, v_edge_pos;
500  ptrdiff_t linesize, uvlinesize;
501 
502  dxy = ((motion_y & 3) << 2) | (motion_x & 3);
503 
504  src_x = s->mb_x * 16 + (motion_x >> 2);
505  src_y = s->mb_y * (16 >> field_based) + (motion_y >> 2);
506 
507  v_edge_pos = s->v_edge_pos >> field_based;
508  linesize = s->linesize << field_based;
509  uvlinesize = s->uvlinesize << field_based;
510 
511  if (field_based) {
512  mx = motion_x / 2;
513  my = motion_y >> 1;
514  } else if (s->workaround_bugs & FF_BUG_QPEL_CHROMA2) {
515  static const int rtab[8] = { 0, 0, 1, 1, 0, 0, 0, 1 };
516  mx = (motion_x >> 1) + rtab[motion_x & 7];
517  my = (motion_y >> 1) + rtab[motion_y & 7];
518  } else if (s->workaround_bugs & FF_BUG_QPEL_CHROMA) {
519  mx = (motion_x >> 1) | (motion_x & 1);
520  my = (motion_y >> 1) | (motion_y & 1);
521  } else {
522  mx = motion_x / 2;
523  my = motion_y / 2;
524  }
525  mx = (mx >> 1) | (mx & 1);
526  my = (my >> 1) | (my & 1);
527 
528  uvdxy = (mx & 1) | ((my & 1) << 1);
529  mx >>= 1;
530  my >>= 1;
531 
532  uvsrc_x = s->mb_x * 8 + mx;
533  uvsrc_y = s->mb_y * (8 >> field_based) + my;
534 
535  ptr_y = ref_picture[0] + src_y * linesize + src_x;
536  ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
537  ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
538 
539  if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 3) - 16, 0) ||
540  (unsigned)src_y > FFMAX( v_edge_pos - (motion_y & 3) - h, 0)) {
541  s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr_y,
542  s->linesize, s->linesize,
543  17, 17 + field_based,
544  src_x, src_y << field_based,
545  s->h_edge_pos, s->v_edge_pos);
546  ptr_y = s->edge_emu_buffer;
547  if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
548  uint8_t *ubuf = s->edge_emu_buffer + 18 * s->linesize;
549  uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
550  s->vdsp.emulated_edge_mc(ubuf, 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(vbuf, 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 = ubuf;
561  ptr_cr = vbuf;
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->flags & 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->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->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->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->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  av_assert2(!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->flags & 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->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->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->flags & 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 && s->pict_type != AV_PICTURE_TYPE_B && !s->first_field
903  || !ref_picture[0]) {
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) && ref_picture[0]) {
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  if (!ref_picture[0]) {
948  ref_picture = s->current_picture_ptr->f->data;
949  }
950  for (i = 0; i < 2; i++) {
951  mpeg_motion(s, dest_y, dest_cb, dest_cr,
952  s->picture_structure != i + 1,
953  ref_picture, pix_op,
954  s->mv[dir][2 * i][0], s->mv[dir][2 * i][1],
955  16, mb_y >> 1);
956 
957  // after put we make avg of the same block
958  pix_op = s->hdsp.avg_pixels_tab;
959 
960  /* opposite parity is always in the same frame if this is
961  * second field */
962  if (!s->first_field) {
963  ref_picture = s->current_picture_ptr->f->data;
964  }
965  }
966  }
967  break;
968  default: av_assert2(0);
969  }
970 }
971 
972 void ff_mpv_motion(MpegEncContext *s,
973  uint8_t *dest_y, uint8_t *dest_cb,
974  uint8_t *dest_cr, int dir,
975  uint8_t **ref_picture,
976  op_pixels_func (*pix_op)[4],
977  qpel_mc_func (*qpix_op)[16])
978 {
979 #if !CONFIG_SMALL
980  if (s->out_format == FMT_MPEG1)
981  mpv_motion_internal(s, dest_y, dest_cb, dest_cr, dir,
982  ref_picture, pix_op, qpix_op, 1);
983  else
984 #endif
985  mpv_motion_internal(s, dest_y, dest_cb, dest_cr, dir,
986  ref_picture, pix_op, qpix_op, 0);
987 }
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