FFmpeg
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 "libavutil/avassert.h"
25 #include "libavutil/internal.h"
26 #include "libavutil/mem_internal.h"
27 
28 #include "avcodec.h"
29 #include "h261.h"
30 #include "mpegutils.h"
31 #include "mpegvideo.h"
32 #include "qpeldsp.h"
33 #include "wmv2.h"
34 
35 static void gmc1_motion(MpegEncContext *s,
36  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
37  uint8_t **ref_picture)
38 {
39  uint8_t *ptr;
40  int src_x, src_y, motion_x, motion_y;
41  ptrdiff_t offset, linesize, uvlinesize;
42  int emu = 0;
43 
44  motion_x = s->sprite_offset[0][0];
45  motion_y = s->sprite_offset[0][1];
46  src_x = s->mb_x * 16 + (motion_x >> (s->sprite_warping_accuracy + 1));
47  src_y = s->mb_y * 16 + (motion_y >> (s->sprite_warping_accuracy + 1));
48  motion_x *= 1 << (3 - s->sprite_warping_accuracy);
49  motion_y *= 1 << (3 - s->sprite_warping_accuracy);
50  src_x = av_clip(src_x, -16, s->width);
51  if (src_x == s->width)
52  motion_x = 0;
53  src_y = av_clip(src_y, -16, s->height);
54  if (src_y == s->height)
55  motion_y = 0;
56 
57  linesize = s->linesize;
58  uvlinesize = s->uvlinesize;
59 
60  ptr = ref_picture[0] + src_y * linesize + src_x;
61 
62  if ((unsigned)src_x >= FFMAX(s->h_edge_pos - 17, 0) ||
63  (unsigned)src_y >= FFMAX(s->v_edge_pos - 17, 0)) {
64  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
65  linesize, linesize,
66  17, 17,
67  src_x, src_y,
68  s->h_edge_pos, s->v_edge_pos);
69  ptr = s->sc.edge_emu_buffer;
70  }
71 
72  if ((motion_x | motion_y) & 7) {
73  s->mdsp.gmc1(dest_y, ptr, linesize, 16,
74  motion_x & 15, motion_y & 15, 128 - s->no_rounding);
75  s->mdsp.gmc1(dest_y + 8, ptr + 8, linesize, 16,
76  motion_x & 15, motion_y & 15, 128 - s->no_rounding);
77  } else {
78  int dxy;
79 
80  dxy = ((motion_x >> 3) & 1) | ((motion_y >> 2) & 2);
81  if (s->no_rounding) {
82  s->hdsp.put_no_rnd_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);
83  } else {
84  s->hdsp.put_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);
85  }
86  }
87 
88  if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
89  return;
90 
91  motion_x = s->sprite_offset[1][0];
92  motion_y = s->sprite_offset[1][1];
93  src_x = s->mb_x * 8 + (motion_x >> (s->sprite_warping_accuracy + 1));
94  src_y = s->mb_y * 8 + (motion_y >> (s->sprite_warping_accuracy + 1));
95  motion_x *= 1 << (3 - s->sprite_warping_accuracy);
96  motion_y *= 1 << (3 - s->sprite_warping_accuracy);
97  src_x = av_clip(src_x, -8, s->width >> 1);
98  if (src_x == s->width >> 1)
99  motion_x = 0;
100  src_y = av_clip(src_y, -8, s->height >> 1);
101  if (src_y == s->height >> 1)
102  motion_y = 0;
103 
104  offset = (src_y * uvlinesize) + src_x;
105  ptr = ref_picture[1] + offset;
106  if ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - 9, 0) ||
107  (unsigned)src_y >= FFMAX((s->v_edge_pos >> 1) - 9, 0)) {
108  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
109  uvlinesize, uvlinesize,
110  9, 9,
111  src_x, src_y,
112  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
113  ptr = s->sc.edge_emu_buffer;
114  emu = 1;
115  }
116  s->mdsp.gmc1(dest_cb, ptr, uvlinesize, 8,
117  motion_x & 15, motion_y & 15, 128 - s->no_rounding);
118 
119  ptr = ref_picture[2] + offset;
120  if (emu) {
121  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
122  uvlinesize, uvlinesize,
123  9, 9,
124  src_x, src_y,
125  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
126  ptr = s->sc.edge_emu_buffer;
127  }
128  s->mdsp.gmc1(dest_cr, ptr, uvlinesize, 8,
129  motion_x & 15, motion_y & 15, 128 - s->no_rounding);
130 }
131 
132 static void gmc_motion(MpegEncContext *s,
133  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
134  uint8_t **ref_picture)
135 {
136  uint8_t *ptr;
137  int linesize, uvlinesize;
138  const int a = s->sprite_warping_accuracy;
139  int ox, oy;
140 
141  linesize = s->linesize;
142  uvlinesize = s->uvlinesize;
143 
144  ptr = ref_picture[0];
145 
146  ox = s->sprite_offset[0][0] + s->sprite_delta[0][0] * s->mb_x * 16 +
147  s->sprite_delta[0][1] * s->mb_y * 16;
148  oy = s->sprite_offset[0][1] + s->sprite_delta[1][0] * s->mb_x * 16 +
149  s->sprite_delta[1][1] * s->mb_y * 16;
150 
151  s->mdsp.gmc(dest_y, ptr, linesize, 16,
152  ox, oy,
153  s->sprite_delta[0][0], s->sprite_delta[0][1],
154  s->sprite_delta[1][0], s->sprite_delta[1][1],
155  a + 1, (1 << (2 * a + 1)) - s->no_rounding,
156  s->h_edge_pos, s->v_edge_pos);
157  s->mdsp.gmc(dest_y + 8, ptr, linesize, 16,
158  ox + s->sprite_delta[0][0] * 8,
159  oy + s->sprite_delta[1][0] * 8,
160  s->sprite_delta[0][0], s->sprite_delta[0][1],
161  s->sprite_delta[1][0], s->sprite_delta[1][1],
162  a + 1, (1 << (2 * a + 1)) - s->no_rounding,
163  s->h_edge_pos, s->v_edge_pos);
164 
165  if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
166  return;
167 
168  ox = s->sprite_offset[1][0] + s->sprite_delta[0][0] * s->mb_x * 8 +
169  s->sprite_delta[0][1] * s->mb_y * 8;
170  oy = s->sprite_offset[1][1] + s->sprite_delta[1][0] * s->mb_x * 8 +
171  s->sprite_delta[1][1] * s->mb_y * 8;
172 
173  ptr = ref_picture[1];
174  s->mdsp.gmc(dest_cb, ptr, uvlinesize, 8,
175  ox, oy,
176  s->sprite_delta[0][0], s->sprite_delta[0][1],
177  s->sprite_delta[1][0], s->sprite_delta[1][1],
178  a + 1, (1 << (2 * a + 1)) - s->no_rounding,
179  (s->h_edge_pos + 1) >> 1, (s->v_edge_pos + 1) >> 1);
180 
181  ptr = ref_picture[2];
182  s->mdsp.gmc(dest_cr, ptr, uvlinesize, 8,
183  ox, oy,
184  s->sprite_delta[0][0], s->sprite_delta[0][1],
185  s->sprite_delta[1][0], s->sprite_delta[1][1],
186  a + 1, (1 << (2 * a + 1)) - s->no_rounding,
187  (s->h_edge_pos + 1) >> 1, (s->v_edge_pos + 1) >> 1);
188 }
189 
190 static inline int hpel_motion(MpegEncContext *s,
191  uint8_t *dest, uint8_t *src,
192  int src_x, int src_y,
193  op_pixels_func *pix_op,
194  int motion_x, int motion_y)
195 {
196  int dxy = 0;
197  int emu = 0;
198 
199  src_x += motion_x >> 1;
200  src_y += motion_y >> 1;
201 
202  /* WARNING: do no forget half pels */
203  src_x = av_clip(src_x, -16, s->width); // FIXME unneeded for emu?
204  if (src_x != s->width)
205  dxy |= motion_x & 1;
206  src_y = av_clip(src_y, -16, s->height);
207  if (src_y != s->height)
208  dxy |= (motion_y & 1) << 1;
209  src += src_y * s->linesize + src_x;
210 
211  if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 1) - 7, 0) ||
212  (unsigned)src_y >= FFMAX(s->v_edge_pos - (motion_y & 1) - 7, 0)) {
213  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src,
214  s->linesize, s->linesize,
215  9, 9,
216  src_x, src_y,
217  s->h_edge_pos, s->v_edge_pos);
218  src = s->sc.edge_emu_buffer;
219  emu = 1;
220  }
221  pix_op[dxy](dest, src, s->linesize, 8);
222  return emu;
223 }
224 
225 static av_always_inline
226 void mpeg_motion_internal(MpegEncContext *s,
227  uint8_t *dest_y,
228  uint8_t *dest_cb,
229  uint8_t *dest_cr,
230  int field_based,
231  int bottom_field,
232  int field_select,
233  uint8_t **ref_picture,
234  op_pixels_func (*pix_op)[4],
235  int motion_x,
236  int motion_y,
237  int h,
238  int is_mpeg12,
239  int is_16x8,
240  int mb_y)
241 {
242  uint8_t *ptr_y, *ptr_cb, *ptr_cr;
243  int dxy, uvdxy, mx, my, src_x, src_y,
244  uvsrc_x, uvsrc_y, v_edge_pos, block_y_half;
245  ptrdiff_t uvlinesize, linesize;
246 
247  v_edge_pos = s->v_edge_pos >> field_based;
248  linesize = s->current_picture.f->linesize[0] << field_based;
249  uvlinesize = s->current_picture.f->linesize[1] << field_based;
250  block_y_half = (field_based | is_16x8);
251 
252  dxy = ((motion_y & 1) << 1) | (motion_x & 1);
253  src_x = s->mb_x * 16 + (motion_x >> 1);
254  src_y = (mb_y << (4 - block_y_half)) + (motion_y >> 1);
255 
256  if (!is_mpeg12 && s->out_format == FMT_H263) {
257  if ((s->workaround_bugs & FF_BUG_HPEL_CHROMA) && field_based) {
258  mx = (motion_x >> 1) | (motion_x & 1);
259  my = motion_y >> 1;
260  uvdxy = ((my & 1) << 1) | (mx & 1);
261  uvsrc_x = s->mb_x * 8 + (mx >> 1);
262  uvsrc_y = (mb_y << (3 - block_y_half)) + (my >> 1);
263  } else {
264  uvdxy = dxy | (motion_y & 2) | ((motion_x & 2) >> 1);
265  uvsrc_x = src_x >> 1;
266  uvsrc_y = src_y >> 1;
267  }
268  // Even chroma mv's are full pel in H261
269  } else if (!is_mpeg12 && s->out_format == FMT_H261) {
270  mx = motion_x / 4;
271  my = motion_y / 4;
272  uvdxy = 0;
273  uvsrc_x = s->mb_x * 8 + mx;
274  uvsrc_y = mb_y * 8 + my;
275  } else {
276  if (s->chroma_y_shift) {
277  mx = motion_x / 2;
278  my = motion_y / 2;
279  uvdxy = ((my & 1) << 1) | (mx & 1);
280  uvsrc_x = s->mb_x * 8 + (mx >> 1);
281  uvsrc_y = (mb_y << (3 - block_y_half)) + (my >> 1);
282  } else {
283  if (s->chroma_x_shift) {
284  // Chroma422
285  mx = motion_x / 2;
286  uvdxy = ((motion_y & 1) << 1) | (mx & 1);
287  uvsrc_x = s->mb_x * 8 + (mx >> 1);
288  uvsrc_y = src_y;
289  } else {
290  // Chroma444
291  uvdxy = dxy;
292  uvsrc_x = src_x;
293  uvsrc_y = src_y;
294  }
295  }
296  }
297 
298  ptr_y = ref_picture[0] + src_y * linesize + src_x;
299  ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
300  ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
301 
302  if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 1) - 15 , 0) ||
303  (unsigned)src_y >= FFMAX( v_edge_pos - (motion_y & 1) - h + 1, 0)) {
304  if (is_mpeg12 || (CONFIG_SMALL &&
305  (s->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
306  s->codec_id == AV_CODEC_ID_MPEG1VIDEO))) {
307  av_log(s->avctx, AV_LOG_DEBUG,
308  "MPEG motion vector out of boundary (%d %d)\n", src_x,
309  src_y);
310  return;
311  }
312  src_y = (unsigned)src_y << field_based;
313  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
314  s->linesize, s->linesize,
315  17, 17 + field_based,
316  src_x, src_y,
317  s->h_edge_pos, s->v_edge_pos);
318  ptr_y = s->sc.edge_emu_buffer;
319  if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
320  uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;
321  uint8_t *vbuf = ubuf + 10 * s->uvlinesize;
322  if (s->workaround_bugs & FF_BUG_IEDGE)
323  vbuf -= s->uvlinesize;
324  uvsrc_y = (unsigned)uvsrc_y << field_based;
325  s->vdsp.emulated_edge_mc(ubuf, ptr_cb,
326  s->uvlinesize, s->uvlinesize,
327  9, 9 + field_based,
328  uvsrc_x, uvsrc_y,
329  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
330  s->vdsp.emulated_edge_mc(vbuf, ptr_cr,
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  ptr_cb = ubuf;
336  ptr_cr = vbuf;
337  }
338  }
339 
340  /* FIXME use this for field pix too instead of the obnoxious hack which
341  * changes picture.data */
342  if (bottom_field) {
343  dest_y += s->linesize;
344  dest_cb += s->uvlinesize;
345  dest_cr += s->uvlinesize;
346  }
347 
348  if (field_select) {
349  ptr_y += s->linesize;
350  ptr_cb += s->uvlinesize;
351  ptr_cr += s->uvlinesize;
352  }
353 
354  pix_op[0][dxy](dest_y, ptr_y, linesize, h);
355 
356  if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
357  pix_op[s->chroma_x_shift][uvdxy]
358  (dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);
359  pix_op[s->chroma_x_shift][uvdxy]
360  (dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift);
361  }
362  if (!is_mpeg12 && (CONFIG_H261_ENCODER || CONFIG_H261_DECODER) &&
363  s->out_format == FMT_H261) {
364  ff_h261_loop_filter(s);
365  }
366 }
367 /* apply one mpeg motion vector to the three components */
368 static void mpeg_motion(MpegEncContext *s,
369  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
370  int field_select, uint8_t **ref_picture,
371  op_pixels_func (*pix_op)[4],
372  int motion_x, int motion_y, int h, int is_16x8, int mb_y)
373 {
374 #if !CONFIG_SMALL
375  if (s->out_format == FMT_MPEG1)
376  mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 0, 0,
377  field_select, ref_picture, pix_op,
378  motion_x, motion_y, h, 1, is_16x8, mb_y);
379  else
380 #endif
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, 0, is_16x8, mb_y);
384 }
385 
386 static void mpeg_motion_field(MpegEncContext *s, uint8_t *dest_y,
387  uint8_t *dest_cb, uint8_t *dest_cr,
388  int bottom_field, int field_select,
389  uint8_t **ref_picture,
390  op_pixels_func (*pix_op)[4],
391  int motion_x, int motion_y, int h, int mb_y)
392 {
393 #if !CONFIG_SMALL
394  if (s->out_format == FMT_MPEG1)
395  mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, 1,
396  bottom_field, field_select, ref_picture, pix_op,
397  motion_x, motion_y, h, 1, 0, mb_y);
398  else
399 #endif
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, 0, 0, mb_y);
403 }
404 
405 // FIXME: SIMDify, avg variant, 16x16 version
406 static inline void put_obmc(uint8_t *dst, uint8_t *src[5], int stride)
407 {
408  int x;
409  uint8_t *const top = src[1];
410  uint8_t *const left = src[2];
411  uint8_t *const mid = src[0];
412  uint8_t *const right = src[3];
413  uint8_t *const bottom = src[4];
414 #define OBMC_FILTER(x, t, l, m, r, b)\
415  dst[x]= (t*top[x] + l*left[x] + m*mid[x] + r*right[x] + b*bottom[x] + 4)>>3
416 #define OBMC_FILTER4(x, t, l, m, r, b)\
417  OBMC_FILTER(x , t, l, m, r, b);\
418  OBMC_FILTER(x+1 , t, l, m, r, b);\
419  OBMC_FILTER(x +stride, t, l, m, r, b);\
420  OBMC_FILTER(x+1+stride, t, l, m, r, b);
421 
422  x = 0;
423  OBMC_FILTER (x , 2, 2, 4, 0, 0);
424  OBMC_FILTER (x + 1, 2, 1, 5, 0, 0);
425  OBMC_FILTER4(x + 2, 2, 1, 5, 0, 0);
426  OBMC_FILTER4(x + 4, 2, 0, 5, 1, 0);
427  OBMC_FILTER (x + 6, 2, 0, 5, 1, 0);
428  OBMC_FILTER (x + 7, 2, 0, 4, 2, 0);
429  x += stride;
430  OBMC_FILTER (x , 1, 2, 5, 0, 0);
431  OBMC_FILTER (x + 1, 1, 2, 5, 0, 0);
432  OBMC_FILTER (x + 6, 1, 0, 5, 2, 0);
433  OBMC_FILTER (x + 7, 1, 0, 5, 2, 0);
434  x += stride;
435  OBMC_FILTER4(x , 1, 2, 5, 0, 0);
436  OBMC_FILTER4(x + 2, 1, 1, 6, 0, 0);
437  OBMC_FILTER4(x + 4, 1, 0, 6, 1, 0);
438  OBMC_FILTER4(x + 6, 1, 0, 5, 2, 0);
439  x += 2 * stride;
440  OBMC_FILTER4(x , 0, 2, 5, 0, 1);
441  OBMC_FILTER4(x + 2, 0, 1, 6, 0, 1);
442  OBMC_FILTER4(x + 4, 0, 0, 6, 1, 1);
443  OBMC_FILTER4(x + 6, 0, 0, 5, 2, 1);
444  x += 2*stride;
445  OBMC_FILTER (x , 0, 2, 5, 0, 1);
446  OBMC_FILTER (x + 1, 0, 2, 5, 0, 1);
447  OBMC_FILTER4(x + 2, 0, 1, 5, 0, 2);
448  OBMC_FILTER4(x + 4, 0, 0, 5, 1, 2);
449  OBMC_FILTER (x + 6, 0, 0, 5, 2, 1);
450  OBMC_FILTER (x + 7, 0, 0, 5, 2, 1);
451  x += stride;
452  OBMC_FILTER (x , 0, 2, 4, 0, 2);
453  OBMC_FILTER (x + 1, 0, 1, 5, 0, 2);
454  OBMC_FILTER (x + 6, 0, 0, 5, 1, 2);
455  OBMC_FILTER (x + 7, 0, 0, 4, 2, 2);
456 }
457 
458 /* obmc for 1 8x8 luma block */
459 static inline void obmc_motion(MpegEncContext *s,
460  uint8_t *dest, uint8_t *src,
461  int src_x, int src_y,
462  op_pixels_func *pix_op,
463  int16_t mv[5][2] /* mid top left right bottom */)
464 #define MID 0
465 {
466  int i;
467  uint8_t *ptr[5];
468 
469  av_assert2(s->quarter_sample == 0);
470 
471  for (i = 0; i < 5; i++) {
472  if (i && mv[i][0] == mv[MID][0] && mv[i][1] == mv[MID][1]) {
473  ptr[i] = ptr[MID];
474  } else {
475  ptr[i] = s->sc.obmc_scratchpad + 8 * (i & 1) +
476  s->linesize * 8 * (i >> 1);
477  hpel_motion(s, ptr[i], src, src_x, src_y, pix_op,
478  mv[i][0], mv[i][1]);
479  }
480  }
481 
482  put_obmc(dest, ptr, s->linesize);
483 }
484 
485 static inline void qpel_motion(MpegEncContext *s,
486  uint8_t *dest_y,
487  uint8_t *dest_cb,
488  uint8_t *dest_cr,
489  int field_based, int bottom_field,
490  int field_select, uint8_t **ref_picture,
491  op_pixels_func (*pix_op)[4],
492  qpel_mc_func (*qpix_op)[16],
493  int motion_x, int motion_y, int h)
494 {
495  uint8_t *ptr_y, *ptr_cb, *ptr_cr;
496  int dxy, uvdxy, mx, my, src_x, src_y, uvsrc_x, uvsrc_y, v_edge_pos;
497  ptrdiff_t linesize, uvlinesize;
498 
499  dxy = ((motion_y & 3) << 2) | (motion_x & 3);
500 
501  src_x = s->mb_x * 16 + (motion_x >> 2);
502  src_y = s->mb_y * (16 >> field_based) + (motion_y >> 2);
503 
504  v_edge_pos = s->v_edge_pos >> field_based;
505  linesize = s->linesize << field_based;
506  uvlinesize = s->uvlinesize << field_based;
507 
508  if (field_based) {
509  mx = motion_x / 2;
510  my = motion_y >> 1;
511  } else if (s->workaround_bugs & FF_BUG_QPEL_CHROMA2) {
512  static const int rtab[8] = { 0, 0, 1, 1, 0, 0, 0, 1 };
513  mx = (motion_x >> 1) + rtab[motion_x & 7];
514  my = (motion_y >> 1) + rtab[motion_y & 7];
515  } else if (s->workaround_bugs & FF_BUG_QPEL_CHROMA) {
516  mx = (motion_x >> 1) | (motion_x & 1);
517  my = (motion_y >> 1) | (motion_y & 1);
518  } else {
519  mx = motion_x / 2;
520  my = motion_y / 2;
521  }
522  mx = (mx >> 1) | (mx & 1);
523  my = (my >> 1) | (my & 1);
524 
525  uvdxy = (mx & 1) | ((my & 1) << 1);
526  mx >>= 1;
527  my >>= 1;
528 
529  uvsrc_x = s->mb_x * 8 + mx;
530  uvsrc_y = s->mb_y * (8 >> field_based) + my;
531 
532  ptr_y = ref_picture[0] + src_y * linesize + src_x;
533  ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
534  ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
535 
536  if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 3) - 15 , 0) ||
537  (unsigned)src_y >= FFMAX( v_edge_pos - (motion_y & 3) - h + 1, 0)) {
538  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
539  s->linesize, s->linesize,
540  17, 17 + field_based,
541  src_x, src_y * (1 << field_based),
542  s->h_edge_pos, s->v_edge_pos);
543  ptr_y = s->sc.edge_emu_buffer;
544  if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
545  uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;
546  uint8_t *vbuf = ubuf + 10 * s->uvlinesize;
547  if (s->workaround_bugs & FF_BUG_IEDGE)
548  vbuf -= s->uvlinesize;
549  s->vdsp.emulated_edge_mc(ubuf, ptr_cb,
550  s->uvlinesize, s->uvlinesize,
551  9, 9 + field_based,
552  uvsrc_x, uvsrc_y * (1 << field_based),
553  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
554  s->vdsp.emulated_edge_mc(vbuf, ptr_cr,
555  s->uvlinesize, s->uvlinesize,
556  9, 9 + field_based,
557  uvsrc_x, uvsrc_y * (1 << field_based),
558  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
559  ptr_cb = ubuf;
560  ptr_cr = vbuf;
561  }
562  }
563 
564  if (!field_based)
565  qpix_op[0][dxy](dest_y, ptr_y, linesize);
566  else {
567  if (bottom_field) {
568  dest_y += s->linesize;
569  dest_cb += s->uvlinesize;
570  dest_cr += s->uvlinesize;
571  }
572 
573  if (field_select) {
574  ptr_y += s->linesize;
575  ptr_cb += s->uvlinesize;
576  ptr_cr += s->uvlinesize;
577  }
578  // damn interlaced mode
579  // FIXME boundary mirroring is not exactly correct here
580  qpix_op[1][dxy](dest_y, ptr_y, linesize);
581  qpix_op[1][dxy](dest_y + 8, ptr_y + 8, linesize);
582  }
583  if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
584  pix_op[1][uvdxy](dest_cr, ptr_cr, uvlinesize, h >> 1);
585  pix_op[1][uvdxy](dest_cb, ptr_cb, uvlinesize, h >> 1);
586  }
587 }
588 
589 /**
590  * H.263 chroma 4mv motion compensation.
591  */
592 static void chroma_4mv_motion(MpegEncContext *s,
593  uint8_t *dest_cb, uint8_t *dest_cr,
594  uint8_t **ref_picture,
595  op_pixels_func *pix_op,
596  int mx, int my)
597 {
598  uint8_t *ptr;
599  int src_x, src_y, dxy, emu = 0;
600  ptrdiff_t offset;
601 
602  /* In case of 8X8, we construct a single chroma motion vector
603  * with a special rounding */
604  mx = ff_h263_round_chroma(mx);
605  my = ff_h263_round_chroma(my);
606 
607  dxy = ((my & 1) << 1) | (mx & 1);
608  mx >>= 1;
609  my >>= 1;
610 
611  src_x = s->mb_x * 8 + mx;
612  src_y = s->mb_y * 8 + my;
613  src_x = av_clip(src_x, -8, (s->width >> 1));
614  if (src_x == (s->width >> 1))
615  dxy &= ~1;
616  src_y = av_clip(src_y, -8, (s->height >> 1));
617  if (src_y == (s->height >> 1))
618  dxy &= ~2;
619 
620  offset = src_y * s->uvlinesize + src_x;
621  ptr = ref_picture[1] + offset;
622  if ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - (dxy & 1) - 7, 0) ||
623  (unsigned)src_y >= FFMAX((s->v_edge_pos >> 1) - (dxy >> 1) - 7, 0)) {
624  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
625  s->uvlinesize, s->uvlinesize,
626  9, 9, src_x, src_y,
627  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
628  ptr = s->sc.edge_emu_buffer;
629  emu = 1;
630  }
631  pix_op[dxy](dest_cb, ptr, s->uvlinesize, 8);
632 
633  ptr = ref_picture[2] + offset;
634  if (emu) {
635  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
636  s->uvlinesize, s->uvlinesize,
637  9, 9, src_x, src_y,
638  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
639  ptr = s->sc.edge_emu_buffer;
640  }
641  pix_op[dxy](dest_cr, ptr, s->uvlinesize, 8);
642 }
643 
644 static inline void prefetch_motion(MpegEncContext *s, uint8_t **pix, int dir)
645 {
646  /* fetch pixels for estimated mv 4 macroblocks ahead
647  * optimized for 64byte cache lines */
648  const int shift = s->quarter_sample ? 2 : 1;
649  const int mx = (s->mv[dir][0][0] >> shift) + 16 * s->mb_x + 8;
650  const int my = (s->mv[dir][0][1] >> shift) + 16 * s->mb_y;
651  int off = mx + (my + (s->mb_x & 3) * 4) * s->linesize + 64;
652 
653  s->vdsp.prefetch(pix[0] + off, s->linesize, 4);
654  off = (mx >> 1) + ((my >> 1) + (s->mb_x & 7)) * s->uvlinesize + 64;
655  s->vdsp.prefetch(pix[1] + off, pix[2] - pix[1], 2);
656 }
657 
658 static inline void apply_obmc(MpegEncContext *s,
659  uint8_t *dest_y,
660  uint8_t *dest_cb,
661  uint8_t *dest_cr,
662  uint8_t **ref_picture,
663  op_pixels_func (*pix_op)[4])
664 {
665  LOCAL_ALIGNED_8(int16_t, mv_cache, [4], [4][2]);
666  Picture *cur_frame = &s->current_picture;
667  int mb_x = s->mb_x;
668  int mb_y = s->mb_y;
669  const int xy = mb_x + mb_y * s->mb_stride;
670  const int mot_stride = s->b8_stride;
671  const int mot_xy = mb_x * 2 + mb_y * 2 * mot_stride;
672  int mx, my, i;
673 
674  av_assert2(!s->mb_skipped);
675 
676  AV_COPY32(mv_cache[1][1], cur_frame->motion_val[0][mot_xy]);
677  AV_COPY32(mv_cache[1][2], cur_frame->motion_val[0][mot_xy + 1]);
678 
679  AV_COPY32(mv_cache[2][1],
680  cur_frame->motion_val[0][mot_xy + mot_stride]);
681  AV_COPY32(mv_cache[2][2],
682  cur_frame->motion_val[0][mot_xy + mot_stride + 1]);
683 
684  AV_COPY32(mv_cache[3][1],
685  cur_frame->motion_val[0][mot_xy + mot_stride]);
686  AV_COPY32(mv_cache[3][2],
687  cur_frame->motion_val[0][mot_xy + mot_stride + 1]);
688 
689  if (mb_y == 0 || IS_INTRA(cur_frame->mb_type[xy - s->mb_stride])) {
690  AV_COPY32(mv_cache[0][1], mv_cache[1][1]);
691  AV_COPY32(mv_cache[0][2], mv_cache[1][2]);
692  } else {
693  AV_COPY32(mv_cache[0][1],
694  cur_frame->motion_val[0][mot_xy - mot_stride]);
695  AV_COPY32(mv_cache[0][2],
696  cur_frame->motion_val[0][mot_xy - mot_stride + 1]);
697  }
698 
699  if (mb_x == 0 || IS_INTRA(cur_frame->mb_type[xy - 1])) {
700  AV_COPY32(mv_cache[1][0], mv_cache[1][1]);
701  AV_COPY32(mv_cache[2][0], mv_cache[2][1]);
702  } else {
703  AV_COPY32(mv_cache[1][0], cur_frame->motion_val[0][mot_xy - 1]);
704  AV_COPY32(mv_cache[2][0],
705  cur_frame->motion_val[0][mot_xy - 1 + mot_stride]);
706  }
707 
708  if (mb_x + 1 >= s->mb_width || IS_INTRA(cur_frame->mb_type[xy + 1])) {
709  AV_COPY32(mv_cache[1][3], mv_cache[1][2]);
710  AV_COPY32(mv_cache[2][3], mv_cache[2][2]);
711  } else {
712  AV_COPY32(mv_cache[1][3], cur_frame->motion_val[0][mot_xy + 2]);
713  AV_COPY32(mv_cache[2][3],
714  cur_frame->motion_val[0][mot_xy + 2 + mot_stride]);
715  }
716 
717  mx = 0;
718  my = 0;
719  for (i = 0; i < 4; i++) {
720  const int x = (i & 1) + 1;
721  const int y = (i >> 1) + 1;
722  int16_t mv[5][2] = {
723  { mv_cache[y][x][0], mv_cache[y][x][1] },
724  { mv_cache[y - 1][x][0], mv_cache[y - 1][x][1] },
725  { mv_cache[y][x - 1][0], mv_cache[y][x - 1][1] },
726  { mv_cache[y][x + 1][0], mv_cache[y][x + 1][1] },
727  { mv_cache[y + 1][x][0], mv_cache[y + 1][x][1] }
728  };
729  // FIXME cleanup
730  obmc_motion(s, dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,
731  ref_picture[0],
732  mb_x * 16 + (i & 1) * 8, mb_y * 16 + (i >> 1) * 8,
733  pix_op[1],
734  mv);
735 
736  mx += mv[0][0];
737  my += mv[0][1];
738  }
739  if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))
740  chroma_4mv_motion(s, dest_cb, dest_cr,
741  ref_picture, pix_op[1],
742  mx, my);
743 }
744 
745 static inline void apply_8x8(MpegEncContext *s,
746  uint8_t *dest_y,
747  uint8_t *dest_cb,
748  uint8_t *dest_cr,
749  int dir,
750  uint8_t **ref_picture,
751  qpel_mc_func (*qpix_op)[16],
752  op_pixels_func (*pix_op)[4])
753 {
754  int dxy, mx, my, src_x, src_y;
755  int i;
756  int mb_x = s->mb_x;
757  int mb_y = s->mb_y;
758  uint8_t *ptr, *dest;
759 
760  mx = 0;
761  my = 0;
762  if (s->quarter_sample) {
763  for (i = 0; i < 4; i++) {
764  int motion_x = s->mv[dir][i][0];
765  int motion_y = s->mv[dir][i][1];
766 
767  dxy = ((motion_y & 3) << 2) | (motion_x & 3);
768  src_x = mb_x * 16 + (motion_x >> 2) + (i & 1) * 8;
769  src_y = mb_y * 16 + (motion_y >> 2) + (i >> 1) * 8;
770 
771  /* WARNING: do no forget half pels */
772  src_x = av_clip(src_x, -16, s->width);
773  if (src_x == s->width)
774  dxy &= ~3;
775  src_y = av_clip(src_y, -16, s->height);
776  if (src_y == s->height)
777  dxy &= ~12;
778 
779  ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
780  if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 3) - 7, 0) ||
781  (unsigned)src_y >= FFMAX(s->v_edge_pos - (motion_y & 3) - 7, 0)) {
782  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
783  s->linesize, s->linesize,
784  9, 9,
785  src_x, src_y,
786  s->h_edge_pos,
787  s->v_edge_pos);
788  ptr = s->sc.edge_emu_buffer;
789  }
790  dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;
791  qpix_op[1][dxy](dest, ptr, s->linesize);
792 
793  mx += s->mv[dir][i][0] / 2;
794  my += s->mv[dir][i][1] / 2;
795  }
796  } else {
797  for (i = 0; i < 4; i++) {
798  hpel_motion(s,
799  dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,
800  ref_picture[0],
801  mb_x * 16 + (i & 1) * 8,
802  mb_y * 16 + (i >> 1) * 8,
803  pix_op[1],
804  s->mv[dir][i][0],
805  s->mv[dir][i][1]);
806 
807  mx += s->mv[dir][i][0];
808  my += s->mv[dir][i][1];
809  }
810  }
811 
812  if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))
813  chroma_4mv_motion(s, dest_cb, dest_cr,
814  ref_picture, pix_op[1], mx, my);
815 }
816 
817 /**
818  * motion compensation of a single macroblock
819  * @param s context
820  * @param dest_y luma destination pointer
821  * @param dest_cb chroma cb/u destination pointer
822  * @param dest_cr chroma cr/v destination pointer
823  * @param dir direction (0->forward, 1->backward)
824  * @param ref_picture array[3] of pointers to the 3 planes of the reference picture
825  * @param pix_op halfpel motion compensation function (average or put normally)
826  * @param qpix_op qpel motion compensation function (average or put normally)
827  * the motion vectors are taken from s->mv and the MV type from s->mv_type
828  */
829 static av_always_inline void mpv_motion_internal(MpegEncContext *s,
830  uint8_t *dest_y,
831  uint8_t *dest_cb,
832  uint8_t *dest_cr,
833  int dir,
834  uint8_t **ref_picture,
835  op_pixels_func (*pix_op)[4],
836  qpel_mc_func (*qpix_op)[16],
837  int is_mpeg12)
838 {
839  int i;
840  int mb_y = s->mb_y;
841 
842  prefetch_motion(s, ref_picture, dir);
843 
844  if (!is_mpeg12 && s->obmc && s->pict_type != AV_PICTURE_TYPE_B) {
845  apply_obmc(s, dest_y, dest_cb, dest_cr, ref_picture, pix_op);
846  return;
847  }
848 
849  switch (s->mv_type) {
850  case MV_TYPE_16X16:
851  if (!is_mpeg12 && s->mcsel) {
852  if (s->real_sprite_warping_points == 1) {
853  gmc1_motion(s, dest_y, dest_cb, dest_cr,
854  ref_picture);
855  } else {
856  gmc_motion(s, dest_y, dest_cb, dest_cr,
857  ref_picture);
858  }
859  } else if (!is_mpeg12 && s->quarter_sample) {
860  qpel_motion(s, dest_y, dest_cb, dest_cr,
861  0, 0, 0,
862  ref_picture, pix_op, qpix_op,
863  s->mv[dir][0][0], s->mv[dir][0][1], 16);
864  } else if (!is_mpeg12 && (CONFIG_WMV2_DECODER || CONFIG_WMV2_ENCODER) &&
865  s->mspel && s->codec_id == AV_CODEC_ID_WMV2) {
866  ff_mspel_motion(s, dest_y, dest_cb, dest_cr,
867  ref_picture, pix_op,
868  s->mv[dir][0][0], s->mv[dir][0][1], 16);
869  } else {
870  mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
871  ref_picture, pix_op,
872  s->mv[dir][0][0], s->mv[dir][0][1], 16, 0, mb_y);
873  }
874  break;
875  case MV_TYPE_8X8:
876  if (!is_mpeg12)
877  apply_8x8(s, dest_y, dest_cb, dest_cr,
878  dir, ref_picture, qpix_op, pix_op);
879  break;
880  case MV_TYPE_FIELD:
881  if (s->picture_structure == PICT_FRAME) {
882  if (!is_mpeg12 && s->quarter_sample) {
883  for (i = 0; i < 2; i++)
884  qpel_motion(s, dest_y, dest_cb, dest_cr,
885  1, i, s->field_select[dir][i],
886  ref_picture, pix_op, qpix_op,
887  s->mv[dir][i][0], s->mv[dir][i][1], 8);
888  } else {
889  /* top field */
890  mpeg_motion_field(s, dest_y, dest_cb, dest_cr,
891  0, s->field_select[dir][0],
892  ref_picture, pix_op,
893  s->mv[dir][0][0], s->mv[dir][0][1], 8, mb_y);
894  /* bottom field */
895  mpeg_motion_field(s, dest_y, dest_cb, dest_cr,
896  1, s->field_select[dir][1],
897  ref_picture, pix_op,
898  s->mv[dir][1][0], s->mv[dir][1][1], 8, mb_y);
899  }
900  } else {
901  if ( s->picture_structure != s->field_select[dir][0] + 1 && s->pict_type != AV_PICTURE_TYPE_B && !s->first_field
902  || !ref_picture[0]) {
903  ref_picture = s->current_picture_ptr->f->data;
904  }
905 
906  mpeg_motion(s, dest_y, dest_cb, dest_cr,
907  s->field_select[dir][0],
908  ref_picture, pix_op,
909  s->mv[dir][0][0], s->mv[dir][0][1], 16, 0, mb_y >> 1);
910  }
911  break;
912  case MV_TYPE_16X8:
913  if (CONFIG_SMALL || is_mpeg12) {
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  ref_picture[0]) {
920  ref2picture = ref_picture;
921  } else {
922  ref2picture = s->current_picture_ptr->f->data;
923  }
924 
925  mpeg_motion(s, dest_y, dest_cb, dest_cr,
926  s->field_select[dir][i],
927  ref2picture, pix_op,
928  s->mv[dir][i][0], s->mv[dir][i][1],
929  8, 1, (mb_y & ~1) + i);
930 
931  dest_y += 16 * s->linesize;
932  dest_cb += (16 >> s->chroma_y_shift) * s->uvlinesize;
933  dest_cr += (16 >> s->chroma_y_shift) * s->uvlinesize;
934  }
935  break;
936  }
937  case MV_TYPE_DMV:
938  if (CONFIG_SMALL || is_mpeg12) {
939  if (s->picture_structure == PICT_FRAME) {
940  for (i = 0; i < 2; i++) {
941  for (int 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, 0, 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  break;
969  }
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 }
ff_h263_round_chroma
static int ff_h263_round_chroma(int x)
Definition: motion_est.h:101
PICT_FRAME
#define PICT_FRAME
Definition: mpegutils.h:39
stride
int stride
Definition: mace.c:144
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
av_clip
#define av_clip
Definition: common.h:122
FMT_MPEG1
@ FMT_MPEG1
Definition: mpegutils.h:124
mem_internal.h
chroma_4mv_motion
static void chroma_4mv_motion(MpegEncContext *s, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture, op_pixels_func *pix_op, int mx, int my)
H.263 chroma 4mv motion compensation.
Definition: mpegvideo_motion.c:592
MV_TYPE_16X8
#define MV_TYPE_16X8
2 vectors, one per 16x8 block
Definition: mpegvideo.h:268
apply_obmc
static void apply_obmc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture, op_pixels_func(*pix_op)[4])
Definition: mpegvideo_motion.c:658
mv
static const int8_t mv[256][2]
Definition: 4xm.c:78
qpel_motion
static void qpel_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], qpel_mc_func(*qpix_op)[16], int motion_x, int motion_y, int h)
Definition: mpegvideo_motion.c:485
obmc_motion
static void obmc_motion(MpegEncContext *s, uint8_t *dest, uint8_t *src, int src_x, int src_y, op_pixels_func *pix_op, int16_t mv[5][2])
Definition: mpegvideo_motion.c:459
MpegEncContext::dest
uint8_t * dest[3]
Definition: mpegvideo.h:295
mpegvideo.h
Picture
Picture.
Definition: mpegpicture.h:45
FF_BUG_HPEL_CHROMA
#define FF_BUG_HPEL_CHROMA
Definition: avcodec.h:1583
mpegutils.h
mpeg_motion_field
static void mpeg_motion_field(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int bottom_field, int field_select, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], int motion_x, int motion_y, int h, int mb_y)
Definition: mpegvideo_motion.c:386
MV_TYPE_DMV
#define MV_TYPE_DMV
2 vectors, special mpeg2 Dual Prime Vectors
Definition: mpegvideo.h:270
FF_BUG_QPEL_CHROMA2
#define FF_BUG_QPEL_CHROMA2
Definition: avcodec.h:1580
h261.h
MpegEncContext::linesize
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:134
mpeg_motion
static void mpeg_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_select, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], int motion_x, int motion_y, int h, int is_16x8, int mb_y)
Definition: mpegvideo_motion.c:368
avassert.h
apply_8x8
static void apply_8x8(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t **ref_picture, qpel_mc_func(*qpix_op)[16], op_pixels_func(*pix_op)[4])
Definition: mpegvideo_motion.c:745
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_mpv_motion
void ff_mpv_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], qpel_mc_func(*qpix_op)[16])
Definition: mpegvideo_motion.c:974
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: codec_id.h:67
FMT_H261
@ FMT_H261
Definition: mpegutils.h:125
gmc1_motion
static void gmc1_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture)
Definition: mpegvideo_motion.c:35
OBMC_FILTER4
#define OBMC_FILTER4(x, t, l, m, r, b)
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
IS_INTRA
#define IS_INTRA(x, y)
LOCAL_ALIGNED_8
#define LOCAL_ALIGNED_8(t, v,...)
Definition: mem_internal.h:124
MpegEncContext::field_select
int field_select[2][2]
Definition: mpegvideo.h:277
mpv_motion_internal
static av_always_inline void mpv_motion_internal(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], qpel_mc_func(*qpix_op)[16], int is_mpeg12)
motion compensation of a single macroblock
Definition: mpegvideo_motion.c:829
MpegEncContext::mb_y
int mb_y
Definition: mpegvideo.h:288
src
#define src
Definition: vp8dsp.c:255
FF_BUG_IEDGE
#define FF_BUG_IEDGE
Definition: avcodec.h:1587
qpeldsp.h
op_pixels_func
void(* op_pixels_func)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
Definition: hpeldsp.h:38
wmv2.h
qpel_mc_func
void(* qpel_mc_func)(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
Definition: qpeldsp.h:65
AV_CODEC_ID_MPEG1VIDEO
@ AV_CODEC_ID_MPEG1VIDEO
Definition: codec_id.h:50
MV_TYPE_8X8
#define MV_TYPE_8X8
4 vectors (H.263, MPEG-4 4MV)
Definition: mpegvideo.h:267
hpel_motion
static int hpel_motion(MpegEncContext *s, uint8_t *dest, uint8_t *src, int src_x, int src_y, op_pixels_func *pix_op, int motion_x, int motion_y)
Definition: mpegvideo_motion.c:190
AV_CODEC_FLAG_GRAY
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:308
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
MpegEncContext::v_edge_pos
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:132
OBMC_FILTER
#define OBMC_FILTER(x, t, l, m, r, b)
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
MV_TYPE_FIELD
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:269
Picture::motion_val
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
MpegEncContext::uvlinesize
ptrdiff_t uvlinesize
line size, for chroma in bytes, may be different from width
Definition: mpegvideo.h:135
FMT_H263
@ FMT_H263
Definition: mpegutils.h:126
i
int i
Definition: input.c:407
internal.h
MpegEncContext::mb_x
int mb_x
Definition: mpegvideo.h:288
av_always_inline
#define av_always_inline
Definition: attributes.h:49
prefetch_motion
static void prefetch_motion(MpegEncContext *s, uint8_t **pix, int dir)
Definition: mpegvideo_motion.c:644
uint8_t
uint8_t
Definition: audio_convert.c:194
AV_COPY32
#define AV_COPY32(d, s)
Definition: intreadwrite.h:601
MID
#define MID
FF_BUG_QPEL_CHROMA
#define FF_BUG_QPEL_CHROMA
Definition: avcodec.h:1578
avcodec.h
gmc_motion
static void gmc_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture)
Definition: mpegvideo_motion.c:132
ff_h261_loop_filter
void ff_h261_loop_filter(MpegEncContext *s)
Definition: h261.c:61
mpeg_motion_internal
static av_always_inline void mpeg_motion_internal(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], int motion_x, int motion_y, int h, int is_mpeg12, int is_16x8, int mb_y)
Definition: mpegvideo_motion.c:226
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
put_obmc
static void put_obmc(uint8_t *dst, uint8_t *src[5], int stride)
Definition: mpegvideo_motion.c:406
Picture::mb_type
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
shift
static int shift(int a, int b)
Definition: sonic.c:82
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
h
h
Definition: vp9dsp_template.c:2038
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:81
ff_mspel_motion
void ff_mspel_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], int motion_x, int motion_y, int h)
Definition: wmv2.c:100
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