FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vp56.c
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * VP5 and VP6 compatible video decoder (common features)
24  */
25 
26 #include "avcodec.h"
27 #include "bytestream.h"
28 #include "internal.h"
29 #include "h264chroma.h"
30 #include "vp56.h"
31 #include "vp56data.h"
32 
33 
34 void ff_vp56_init_dequant(VP56Context *s, int quantizer)
35 {
36  s->quantizer = quantizer;
37  s->dequant_dc = ff_vp56_dc_dequant[quantizer] << 2;
38  s->dequant_ac = ff_vp56_ac_dequant[quantizer] << 2;
39 }
40 
41 static int vp56_get_vectors_predictors(VP56Context *s, int row, int col,
43 {
44  int nb_pred = 0;
45  VP56mv vect[2] = {{0,0}, {0,0}};
46  int pos, offset;
47  VP56mv mvp;
48 
49  for (pos=0; pos<12; pos++) {
50  mvp.x = col + ff_vp56_candidate_predictor_pos[pos][0];
51  mvp.y = row + ff_vp56_candidate_predictor_pos[pos][1];
52  if (mvp.x < 0 || mvp.x >= s->mb_width ||
53  mvp.y < 0 || mvp.y >= s->mb_height)
54  continue;
55  offset = mvp.x + s->mb_width*mvp.y;
56 
57  if (ff_vp56_reference_frame[s->macroblocks[offset].type] != ref_frame)
58  continue;
59  if ((s->macroblocks[offset].mv.x == vect[0].x &&
60  s->macroblocks[offset].mv.y == vect[0].y) ||
61  (s->macroblocks[offset].mv.x == 0 &&
62  s->macroblocks[offset].mv.y == 0))
63  continue;
64 
65  vect[nb_pred++] = s->macroblocks[offset].mv;
66  if (nb_pred > 1) {
67  nb_pred = -1;
68  break;
69  }
70  s->vector_candidate_pos = pos;
71  }
72 
73  s->vector_candidate[0] = vect[0];
74  s->vector_candidate[1] = vect[1];
75 
76  return nb_pred+1;
77 }
78 
79 static void vp56_parse_mb_type_models(VP56Context *s)
80 {
81  VP56RangeCoder *c = &s->c;
82  VP56Model *model = s->modelp;
83  int i, ctx, type;
84 
85  for (ctx=0; ctx<3; ctx++) {
86  if (vp56_rac_get_prob_branchy(c, 174)) {
87  int idx = vp56_rac_gets(c, 4);
88  memcpy(model->mb_types_stats[ctx],
90  sizeof(model->mb_types_stats[ctx]));
91  }
92  if (vp56_rac_get_prob_branchy(c, 254)) {
93  for (type=0; type<10; type++) {
94  for(i=0; i<2; i++) {
95  if (vp56_rac_get_prob_branchy(c, 205)) {
96  int delta, sign = vp56_rac_get(c);
97 
100  if (!delta)
101  delta = 4 * vp56_rac_gets(c, 7);
102  model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign;
103  }
104  }
105  }
106  }
107  }
108 
109  /* compute MB type probability tables based on previous MB type */
110  for (ctx=0; ctx<3; ctx++) {
111  int p[10];
112 
113  for (type=0; type<10; type++)
114  p[type] = 100 * model->mb_types_stats[ctx][type][1];
115 
116  for (type=0; type<10; type++) {
117  int p02, p34, p0234, p17, p56, p89, p5689, p156789;
118 
119  /* conservative MB type probability */
120  model->mb_type[ctx][type][0] = 255 - (255 * model->mb_types_stats[ctx][type][0]) / (1 + model->mb_types_stats[ctx][type][0] + model->mb_types_stats[ctx][type][1]);
121 
122  p[type] = 0; /* same MB type => weight is null */
123 
124  /* binary tree parsing probabilities */
125  p02 = p[0] + p[2];
126  p34 = p[3] + p[4];
127  p0234 = p02 + p34;
128  p17 = p[1] + p[7];
129  p56 = p[5] + p[6];
130  p89 = p[8] + p[9];
131  p5689 = p56 + p89;
132  p156789 = p17 + p5689;
133 
134  model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789);
135  model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234);
136  model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789);
137  model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02);
138  model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34);
139  model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17);
140  model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689);
141  model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56);
142  model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89);
143 
144  /* restore initial value */
145  p[type] = 100 * model->mb_types_stats[ctx][type][1];
146  }
147  }
148 }
149 
150 static VP56mb vp56_parse_mb_type(VP56Context *s,
151  VP56mb prev_type, int ctx)
152 {
153  uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type];
154  VP56RangeCoder *c = &s->c;
155 
156  if (vp56_rac_get_prob_branchy(c, mb_type_model[0]))
157  return prev_type;
158  else
159  return vp56_rac_get_tree(c, ff_vp56_pmbt_tree, mb_type_model);
160 }
161 
162 static void vp56_decode_4mv(VP56Context *s, int row, int col)
163 {
164  VP56mv mv = {0,0};
165  int type[4];
166  int b;
167 
168  /* parse each block type */
169  for (b=0; b<4; b++) {
170  type[b] = vp56_rac_gets(&s->c, 2);
171  if (type[b])
172  type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */
173  }
174 
175  /* get vectors */
176  for (b=0; b<4; b++) {
177  switch (type[b]) {
179  s->mv[b] = (VP56mv) {0,0};
180  break;
182  s->parse_vector_adjustment(s, &s->mv[b]);
183  break;
184  case VP56_MB_INTER_V1_PF:
185  s->mv[b] = s->vector_candidate[0];
186  break;
187  case VP56_MB_INTER_V2_PF:
188  s->mv[b] = s->vector_candidate[1];
189  break;
190  }
191  mv.x += s->mv[b].x;
192  mv.y += s->mv[b].y;
193  }
194 
195  /* this is the one selected for the whole MB for prediction */
196  s->macroblocks[row * s->mb_width + col].mv = s->mv[3];
197 
198  /* chroma vectors are average luma vectors */
199  if (s->avctx->codec->id == AV_CODEC_ID_VP5) {
200  s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2);
201  s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2);
202  } else {
203  s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4};
204  }
205 }
206 
207 static VP56mb vp56_decode_mv(VP56Context *s, int row, int col)
208 {
209  VP56mv *mv, vect = {0,0};
210  int ctx, b;
211 
213  s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx);
214  s->macroblocks[row * s->mb_width + col].type = s->mb_type;
215 
216  switch (s->mb_type) {
217  case VP56_MB_INTER_V1_PF:
218  mv = &s->vector_candidate[0];
219  break;
220 
221  case VP56_MB_INTER_V2_PF:
222  mv = &s->vector_candidate[1];
223  break;
224 
225  case VP56_MB_INTER_V1_GF:
227  mv = &s->vector_candidate[0];
228  break;
229 
230  case VP56_MB_INTER_V2_GF:
232  mv = &s->vector_candidate[1];
233  break;
234 
236  s->parse_vector_adjustment(s, &vect);
237  mv = &vect;
238  break;
239 
242  s->parse_vector_adjustment(s, &vect);
243  mv = &vect;
244  break;
245 
246  case VP56_MB_INTER_4V:
247  vp56_decode_4mv(s, row, col);
248  return s->mb_type;
249 
250  default:
251  mv = &vect;
252  break;
253  }
254 
255  s->macroblocks[row*s->mb_width + col].mv = *mv;
256 
257  /* same vector for all blocks */
258  for (b=0; b<6; b++)
259  s->mv[b] = *mv;
260 
261  return s->mb_type;
262 }
263 
264 static VP56mb vp56_conceal_mv(VP56Context *s, int row, int col)
265 {
266  VP56mv *mv, vect = {0,0};
267  int b;
268 
269  s->mb_type = VP56_MB_INTER_NOVEC_PF;
270  s->macroblocks[row * s->mb_width + col].type = s->mb_type;
271 
272  mv = &vect;
273 
274  s->macroblocks[row*s->mb_width + col].mv = *mv;
275 
276  /* same vector for all blocks */
277  for (b=0; b<6; b++)
278  s->mv[b] = *mv;
279 
280  return s->mb_type;
281 }
282 
283 static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
284 {
285  int idx = s->idct_scantable[0];
286  int b;
287 
288  for (b=0; b<6; b++) {
289  VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]];
290  VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]];
291  int count = 0;
292  int dc = 0;
293  int i;
294 
295  if (ref_frame == lb->ref_frame) {
296  dc += lb->dc_coeff;
297  count++;
298  }
299  if (ref_frame == ab->ref_frame) {
300  dc += ab->dc_coeff;
301  count++;
302  }
303  if (s->avctx->codec->id == AV_CODEC_ID_VP5)
304  for (i=0; i<2; i++)
305  if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) {
306  dc += ab[-1+2*i].dc_coeff;
307  count++;
308  }
309  if (count == 0)
310  dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame];
311  else if (count == 2)
312  dc /= 2;
313 
314  s->block_coeff[b][idx] += dc;
315  s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx];
316  ab->dc_coeff = s->block_coeff[b][idx];
317  ab->ref_frame = ref_frame;
318  lb->dc_coeff = s->block_coeff[b][idx];
319  lb->ref_frame = ref_frame;
320  s->block_coeff[b][idx] *= s->dequant_dc;
321  }
322 }
323 
324 static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
325  ptrdiff_t stride, int dx, int dy)
326 {
327  int t = ff_vp56_filter_threshold[s->quantizer];
328  if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t);
329  if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t);
330 }
331 
332 static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
333  ptrdiff_t stride, int x, int y)
334 {
335  uint8_t *dst = s->frames[VP56_FRAME_CURRENT]->data[plane] + s->block_offset[b];
336  uint8_t *src_block;
337  int src_offset;
338  int overlap_offset = 0;
339  int mask = s->vp56_coord_div[b] - 1;
340  int deblock_filtering = s->deblock_filtering;
341  int dx;
342  int dy;
343 
344  if (s->avctx->skip_loop_filter >= AVDISCARD_ALL ||
345  (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY
346  && !s->frames[VP56_FRAME_CURRENT]->key_frame))
347  deblock_filtering = 0;
348 
349  dx = s->mv[b].x / s->vp56_coord_div[b];
350  dy = s->mv[b].y / s->vp56_coord_div[b];
351 
352  if (b >= 4) {
353  x /= 2;
354  y /= 2;
355  }
356  x += dx - 2;
357  y += dy - 2;
358 
359  if (x<0 || x+12>=s->plane_width[plane] ||
360  y<0 || y+12>=s->plane_height[plane]) {
361  s->vdsp.emulated_edge_mc(s->edge_emu_buffer,
362  src + s->block_offset[b] + (dy-2)*stride + (dx-2),
363  stride, stride,
364  12, 12, x, y,
365  s->plane_width[plane],
366  s->plane_height[plane]);
367  src_block = s->edge_emu_buffer;
368  src_offset = 2 + 2*stride;
369  } else if (deblock_filtering) {
370  /* only need a 12x12 block, but there is no such dsp function, */
371  /* so copy a 16x12 block */
372  s->hdsp.put_pixels_tab[0][0](s->edge_emu_buffer,
373  src + s->block_offset[b] + (dy-2)*stride + (dx-2),
374  stride, 12);
375  src_block = s->edge_emu_buffer;
376  src_offset = 2 + 2*stride;
377  } else {
378  src_block = src;
379  src_offset = s->block_offset[b] + dy*stride + dx;
380  }
381 
382  if (deblock_filtering)
383  vp56_deblock_filter(s, src_block, stride, dx&7, dy&7);
384 
385  if (s->mv[b].x & mask)
386  overlap_offset += (s->mv[b].x > 0) ? 1 : -1;
387  if (s->mv[b].y & mask)
388  overlap_offset += (s->mv[b].y > 0) ? stride : -stride;
389 
390  if (overlap_offset) {
391  if (s->filter)
392  s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset,
393  stride, s->mv[b], mask, s->filter_selection, b<4);
394  else
395  s->vp3dsp.put_no_rnd_pixels_l2(dst, src_block+src_offset,
396  src_block+src_offset+overlap_offset,
397  stride, 8);
398  } else {
399  s->hdsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8);
400  }
401 }
402 
403 static av_always_inline void vp56_render_mb(VP56Context *s, int row, int col, int is_alpha, VP56mb mb_type)
404 {
405  int b, ab, b_max, plane, off;
406  AVFrame *frame_current, *frame_ref;
408 
409  vp56_add_predictors_dc(s, ref_frame);
410 
411  frame_current = s->frames[VP56_FRAME_CURRENT];
412  frame_ref = s->frames[ref_frame];
413  if (mb_type != VP56_MB_INTRA && !frame_ref->data[0])
414  return;
415 
416  ab = 6*is_alpha;
417  b_max = 6 - 2*is_alpha;
418 
419  switch (mb_type) {
420  case VP56_MB_INTRA:
421  for (b=0; b<b_max; b++) {
422  plane = ff_vp56_b2p[b+ab];
423  s->vp3dsp.idct_put(frame_current->data[plane] + s->block_offset[b],
424  s->stride[plane], s->block_coeff[b]);
425  }
426  break;
427 
430  for (b=0; b<b_max; b++) {
431  plane = ff_vp56_b2p[b+ab];
432  off = s->block_offset[b];
433  s->hdsp.put_pixels_tab[1][0](frame_current->data[plane] + off,
434  frame_ref->data[plane] + off,
435  s->stride[plane], 8);
436  s->vp3dsp.idct_add(frame_current->data[plane] + off,
437  s->stride[plane], s->block_coeff[b]);
438  }
439  break;
440 
442  case VP56_MB_INTER_V1_PF:
443  case VP56_MB_INTER_V2_PF:
445  case VP56_MB_INTER_4V:
446  case VP56_MB_INTER_V1_GF:
447  case VP56_MB_INTER_V2_GF:
448  for (b=0; b<b_max; b++) {
449  int x_off = b==1 || b==3 ? 8 : 0;
450  int y_off = b==2 || b==3 ? 8 : 0;
451  plane = ff_vp56_b2p[b+ab];
452  vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane],
453  16*col+x_off, 16*row+y_off);
454  s->vp3dsp.idct_add(frame_current->data[plane] + s->block_offset[b],
455  s->stride[plane], s->block_coeff[b]);
456  }
457  break;
458  }
459 
460  if (is_alpha) {
461  s->block_coeff[4][0] = 0;
462  s->block_coeff[5][0] = 0;
463  }
464 }
465 
466 static int vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
467 {
468  VP56mb mb_type;
469  int ret;
470 
471  if (s->frames[VP56_FRAME_CURRENT]->key_frame)
472  mb_type = VP56_MB_INTRA;
473  else
474  mb_type = vp56_decode_mv(s, row, col);
475 
476  ret = s->parse_coeff(s);
477  if (ret < 0)
478  return ret;
479 
480  vp56_render_mb(s, row, col, is_alpha, mb_type);
481 
482  return 0;
483 }
484 
485 static int vp56_conceal_mb(VP56Context *s, int row, int col, int is_alpha)
486 {
487  VP56mb mb_type;
488 
489  if (s->frames[VP56_FRAME_CURRENT]->key_frame)
490  mb_type = VP56_MB_INTRA;
491  else
492  mb_type = vp56_conceal_mv(s, row, col);
493 
494  vp56_render_mb(s, row, col, is_alpha, mb_type);
495 
496  return 0;
497 }
498 
499 static int vp56_size_changed(VP56Context *s)
500 {
501  AVCodecContext *avctx = s->avctx;
502  int stride = s->frames[VP56_FRAME_CURRENT]->linesize[0];
503  int i;
504 
505  s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
506  s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
507  s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
508  s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
509 
510  s->have_undamaged_frame = 0;
511 
512  for (i=0; i<4; i++)
513  s->stride[i] = s->flip * s->frames[VP56_FRAME_CURRENT]->linesize[i];
514 
515  s->mb_width = (avctx->coded_width +15) / 16;
516  s->mb_height = (avctx->coded_height+15) / 16;
517 
518  if (s->mb_width > 1000 || s->mb_height > 1000) {
519  ff_set_dimensions(avctx, 0, 0);
520  av_log(avctx, AV_LOG_ERROR, "picture too big\n");
521  return AVERROR_INVALIDDATA;
522  }
523 
524  av_reallocp_array(&s->above_blocks, 4*s->mb_width+6,
525  sizeof(*s->above_blocks));
526  av_reallocp_array(&s->macroblocks, s->mb_width*s->mb_height,
527  sizeof(*s->macroblocks));
528  av_free(s->edge_emu_buffer_alloc);
529  s->edge_emu_buffer_alloc = av_malloc(16*stride);
530  s->edge_emu_buffer = s->edge_emu_buffer_alloc;
531  if (!s->above_blocks || !s->macroblocks || !s->edge_emu_buffer_alloc)
532  return AVERROR(ENOMEM);
533  if (s->flip < 0)
534  s->edge_emu_buffer += 15 * stride;
535 
536  if (s->alpha_context)
537  return vp56_size_changed(s->alpha_context);
538 
539  return 0;
540 }
541 
542 static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int);
543 
544 int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
545  AVPacket *avpkt)
546 {
547  const uint8_t *buf = avpkt->data;
548  VP56Context *s = avctx->priv_data;
549  AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
550  int remaining_buf_size = avpkt->size;
551  int av_uninit(alpha_offset);
552  int i, res;
553  int ret;
554 
555  if (s->has_alpha) {
556  if (remaining_buf_size < 3)
557  return AVERROR_INVALIDDATA;
558  alpha_offset = bytestream_get_be24(&buf);
559  remaining_buf_size -= 3;
560  if (remaining_buf_size < alpha_offset)
561  return AVERROR_INVALIDDATA;
562  }
563 
564  res = s->parse_header(s, buf, remaining_buf_size);
565  if (res < 0)
566  return res;
567 
568  if (res == VP56_SIZE_CHANGE) {
569  for (i = 0; i < 4; i++) {
570  av_frame_unref(s->frames[i]);
571  if (s->alpha_context)
572  av_frame_unref(s->alpha_context->frames[i]);
573  }
574  }
575 
576  ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF);
577  if (ret < 0) {
578  if (res == VP56_SIZE_CHANGE)
579  ff_set_dimensions(avctx, 0, 0);
580  return ret;
581  }
582 
583  if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
584  av_frame_unref(s->alpha_context->frames[VP56_FRAME_CURRENT]);
585  if ((ret = av_frame_ref(s->alpha_context->frames[VP56_FRAME_CURRENT], p)) < 0) {
586  av_frame_unref(p);
587  if (res == VP56_SIZE_CHANGE)
588  ff_set_dimensions(avctx, 0, 0);
589  return ret;
590  }
591  }
592 
593  if (res == VP56_SIZE_CHANGE) {
594  if (vp56_size_changed(s)) {
595  av_frame_unref(p);
596  return AVERROR_INVALIDDATA;
597  }
598  }
599 
600  if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
601  int bak_w = avctx->width;
602  int bak_h = avctx->height;
603  int bak_cw = avctx->coded_width;
604  int bak_ch = avctx->coded_height;
605  buf += alpha_offset;
606  remaining_buf_size -= alpha_offset;
607 
608  res = s->alpha_context->parse_header(s->alpha_context, buf, remaining_buf_size);
609  if (res != 0) {
610  if(res==VP56_SIZE_CHANGE) {
611  av_log(avctx, AV_LOG_ERROR, "Alpha reconfiguration\n");
612  avctx->width = bak_w;
613  avctx->height = bak_h;
614  avctx->coded_width = bak_cw;
615  avctx->coded_height = bak_ch;
616  }
617  av_frame_unref(p);
618  return AVERROR_INVALIDDATA;
619  }
620  }
621 
622  s->discard_frame = 0;
623  avctx->execute2(avctx, ff_vp56_decode_mbs, 0, 0, (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) + 1);
624 
625  if (s->discard_frame)
626  return AVERROR_INVALIDDATA;
627 
628  if ((res = av_frame_ref(data, p)) < 0)
629  return res;
630  *got_frame = 1;
631 
632  return avpkt->size;
633 }
634 
635 static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *data,
636  int jobnr, int threadnr)
637 {
638  VP56Context *s0 = avctx->priv_data;
639  int is_alpha = (jobnr == 1);
640  VP56Context *s = is_alpha ? s0->alpha_context : s0;
641  AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
642  int mb_row, mb_col, mb_row_flip, mb_offset = 0;
643  int block, y, uv;
644  ptrdiff_t stride_y, stride_uv;
645  int res;
646  int damaged = 0;
647 
648  if (p->key_frame) {
650  s->default_models_init(s);
651  for (block=0; block<s->mb_height*s->mb_width; block++)
652  s->macroblocks[block].type = VP56_MB_INTRA;
653  } else {
656  s->parse_vector_models(s);
657  s->mb_type = VP56_MB_INTER_NOVEC_PF;
658  }
659 
660  if (s->parse_coeff_models(s))
661  goto next;
662 
663  memset(s->prev_dc, 0, sizeof(s->prev_dc));
664  s->prev_dc[1][VP56_FRAME_CURRENT] = 128;
665  s->prev_dc[2][VP56_FRAME_CURRENT] = 128;
666 
667  for (block=0; block < 4*s->mb_width+6; block++) {
668  s->above_blocks[block].ref_frame = VP56_FRAME_NONE;
669  s->above_blocks[block].dc_coeff = 0;
670  s->above_blocks[block].not_null_dc = 0;
671  }
672  s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT;
673  s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT;
674 
675  stride_y = p->linesize[0];
676  stride_uv = p->linesize[1];
677 
678  if (s->flip < 0)
679  mb_offset = 7;
680 
681  /* main macroblocks loop */
682  for (mb_row=0; mb_row<s->mb_height; mb_row++) {
683  if (s->flip < 0)
684  mb_row_flip = s->mb_height - mb_row - 1;
685  else
686  mb_row_flip = mb_row;
687 
688  for (block=0; block<4; block++) {
689  s->left_block[block].ref_frame = VP56_FRAME_NONE;
690  s->left_block[block].dc_coeff = 0;
691  s->left_block[block].not_null_dc = 0;
692  }
693  memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx));
694  memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last));
695 
696  s->above_block_idx[0] = 1;
697  s->above_block_idx[1] = 2;
698  s->above_block_idx[2] = 1;
699  s->above_block_idx[3] = 2;
700  s->above_block_idx[4] = 2*s->mb_width + 2 + 1;
701  s->above_block_idx[5] = 3*s->mb_width + 4 + 1;
702 
703  s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y;
704  s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y;
705  s->block_offset[1] = s->block_offset[0] + 8;
706  s->block_offset[3] = s->block_offset[2] + 8;
707  s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv;
708  s->block_offset[5] = s->block_offset[4];
709 
710  for (mb_col=0; mb_col<s->mb_width; mb_col++) {
711  if (!damaged) {
712  int ret = vp56_decode_mb(s, mb_row, mb_col, is_alpha);
713  if (ret < 0) {
714  damaged = 1;
715  if (!s->have_undamaged_frame || !avctx->error_concealment) {
716  s->discard_frame = 1;
717  return AVERROR_INVALIDDATA;
718  }
719  }
720  }
721  if (damaged)
722  vp56_conceal_mb(s, mb_row, mb_col, is_alpha);
723 
724  for (y=0; y<4; y++) {
725  s->above_block_idx[y] += 2;
726  s->block_offset[y] += 16;
727  }
728 
729  for (uv=4; uv<6; uv++) {
730  s->above_block_idx[uv] += 1;
731  s->block_offset[uv] += 8;
732  }
733  }
734  }
735 
736  if (!damaged)
737  s->have_undamaged_frame = 1;
738 
739 next:
740  if (p->key_frame || s->golden_frame) {
741  av_frame_unref(s->frames[VP56_FRAME_GOLDEN]);
742  if ((res = av_frame_ref(s->frames[VP56_FRAME_GOLDEN], p)) < 0)
743  return res;
744  }
745 
747  FFSWAP(AVFrame *, s->frames[VP56_FRAME_CURRENT],
748  s->frames[VP56_FRAME_PREVIOUS]);
749  return 0;
750 }
751 
752 av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
753 {
754  VP56Context *s = avctx->priv_data;
755  return ff_vp56_init_context(avctx, s, flip, has_alpha);
756 }
757 
758 av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
759  int flip, int has_alpha)
760 {
761  int i;
762 
763  s->avctx = avctx;
764  avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
765  if (avctx->skip_alpha) avctx->pix_fmt = AV_PIX_FMT_YUV420P;
766 
767  ff_h264chroma_init(&s->h264chroma, 8);
768  ff_hpeldsp_init(&s->hdsp, avctx->flags);
769  ff_videodsp_init(&s->vdsp, 8);
770  ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
771  for (i = 0; i < 64; i++) {
772 #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
773  s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
774 #undef TRANSPOSE
775  }
776 
777  for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) {
778  s->frames[i] = av_frame_alloc();
779  if (!s->frames[i]) {
780  ff_vp56_free(avctx);
781  return AVERROR(ENOMEM);
782  }
783  }
784  s->edge_emu_buffer_alloc = NULL;
785 
786  s->above_blocks = NULL;
787  s->macroblocks = NULL;
788  s->quantizer = -1;
789  s->deblock_filtering = 1;
790  s->golden_frame = 0;
791 
792  s->filter = NULL;
793 
794  s->has_alpha = has_alpha;
795 
796  s->modelp = &s->model;
797 
798  if (flip) {
799  s->flip = -1;
800  s->frbi = 2;
801  s->srbi = 0;
802  } else {
803  s->flip = 1;
804  s->frbi = 0;
805  s->srbi = 2;
806  }
807 
808  return 0;
809 }
810 
812 {
813  VP56Context *s = avctx->priv_data;
814  return ff_vp56_free_context(s);
815 }
816 
817 av_cold int ff_vp56_free_context(VP56Context *s)
818 {
819  int i;
820 
821  av_freep(&s->above_blocks);
822  av_freep(&s->macroblocks);
823  av_freep(&s->edge_emu_buffer_alloc);
824 
825  for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++)
826  av_frame_free(&s->frames[i]);
827 
828  return 0;
829 }
int plane
Definition: avisynth_c.h:422
av_cold int ff_vp56_free(AVCodecContext *avctx)
Definition: vp56.c:811
av_cold void ff_videodsp_init(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:38
#define NULL
Definition: coverity.c:32
discard all frames except keyframes
Definition: avcodec.h:828
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
const uint8_t ff_vp56_ac_dequant[64]
Definition: vp56data.c:83
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
VP5 and VP6 compatible video decoder (common features)
static int vp56_get_vectors_predictors(VP56Context *s, int row, int col, VP56Frame ref_frame)
Definition: vp56.c:41
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1948
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:211
uint8_t mb_types_stats[3][10][2]
Definition: vp56.h:119
const VP56Tree ff_vp56_pmbtm_tree[]
Definition: vp56data.c:219
Inter MB, no vector, from previous frame.
Definition: vp56.h:49
int size
Definition: avcodec.h:1672
const char * b
Definition: vf_curves.c:113
static VP56mb vp56_parse_mb_type(VP56Context *s, VP56mb prev_type, int ctx)
Definition: vp56.c:150
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1974
av_cold void ff_h264chroma_init(H264ChromaContext *c, int bit_depth)
Definition: h264chroma.c:41
#define VP56_SIZE_CHANGE
Definition: vp56.h:71
discard all
Definition: avcodec.h:829
#define src
Definition: vp8dsp.c:254
av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
Definition: vp56.c:752
static int16_t block[64]
Definition: dct.c:115
int16_t y
Definition: vp56.h:68
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:102
static VP56mb vp56_decode_mv(VP56Context *s, int row, int col)
Definition: vp56.c:207
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
float delta
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:392
av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s, int flip, int has_alpha)
Definition: vp56.c:758
uint8_t * data
Definition: avcodec.h:1671
static int vp56_conceal_mb(VP56Context *s, int row, int col, int is_alpha)
Definition: vp56.c:485
const uint8_t ff_vp56_dc_dequant[64]
Definition: vp56data.c:94
const uint8_t ff_vp56_filter_threshold[]
Definition: vp56data.c:204
const int8_t ff_vp56_candidate_predictor_pos[12][2]
Definition: vp56data.c:241
static av_always_inline int vp56_rac_get_tree(VP56RangeCoder *c, const VP56Tree *tree, const uint8_t *probs)
Definition: vp56.h:365
Inter MB, second vector, from golden frame.
Definition: vp56.h:58
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const uint16_t mask[17]
Definition: lzw.c:38
static void flip(AVCodecContext *avctx, AVFrame *frame)
Definition: rawdec.c:134
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
int skip_alpha
Skip processing alpha if supported by codec.
Definition: avcodec.h:3515
static av_always_inline int vp56_rac_get(VP56RangeCoder *c)
Definition: vp56.h:289
int error_concealment
error concealment flags
Definition: avcodec.h:2977
static void vp56_parse_mb_type_models(VP56Context *s)
Definition: vp56.c:79
#define s0
Definition: regdef.h:37
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1841
VP56mb
Definition: vp56.h:48
Definition: vp56.h:94
void ff_vp56_init_dequant(VP56Context *s, int quantizer)
Definition: vp56.c:34
const uint8_t ff_vp56_b6to4[]
Definition: vp56data.c:29
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
GLsizei count
Definition: opengl_enc.c:109
static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv, ptrdiff_t stride, int dx, int dy)
Definition: vp56.c:324
Inter MB, first vector, from previous frame.
Definition: vp56.h:52
Intra MB.
Definition: vp56.h:50
static int vp56_size_changed(VP56Context *s)
Definition: vp56.c:499
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:191
av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:338
VP56Frame
Definition: vp56.h:40
VP5 and VP6 compatible video decoder (common data)
const uint8_t ff_vp56_pre_def_mb_type_stats[16][3][10][2]
Definition: vp56data.c:105
Inter MB, first vector, from golden frame.
Definition: vp56.h:57
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
int width
picture width / height.
Definition: avcodec.h:1933
AVFormatContext * ctx
Definition: movenc.c:48
int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: vp56.c:544
static int vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
Definition: vp56.c:466
const uint8_t ff_vp56_b2p[]
Definition: vp56data.c:28
VP56Frame ref_frame
Definition: vp56.h:96
#define FF_ARRAY_ELEMS(a)
static const int8_t mv[256][2]
Definition: 4xm.c:77
const VP56Tree ff_vp56_pmbt_tree[]
Definition: vp56data.c:228
static av_always_inline int vp56_rac_get_prob_branchy(VP56RangeCoder *c, int prob)
Definition: vp56.h:271
Inter MB, 4 vectors, from previous frame.
Definition: vp56.h:56
Inter MB, no vector, from golden frame.
Definition: vp56.h:54
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
Inter MB, second vector, from previous frame.
Definition: vp56.h:53
main external API structure.
Definition: avcodec.h:1746
#define RSHIFT(a, b)
Definition: common.h:54
uint8_t mb_type[3][10][10]
Definition: vp56.h:118
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1663
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int)
Definition: vp56.c:635
int coded_height
Definition: avcodec.h:1948
static VP56mb vp56_conceal_mv(VP56Context *s, int row, int col)
Definition: vp56.c:264
Inter MB, above/left vector + delta, from previous frame.
Definition: vp56.h:51
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
static void vp56_decode_4mv(VP56Context *s, int row, int col)
Definition: vp56.c:162
const uint8_t ff_vp56_mb_type_model_model[]
Definition: vp56data.c:215
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:502
static av_always_inline void vp56_render_mb(VP56Context *s, int row, int col, int is_alpha, VP56mb mb_type)
Definition: vp56.c:403
Definition: vp56.h:66
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
av_cold int ff_vp56_free_context(VP56Context *s)
Definition: vp56.c:817
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
int16_t x
Definition: vp56.h:67
common internal api header.
static int ref_frame(Vp3DecodeContext *s, ThreadFrame *dst, ThreadFrame *src)
Definition: vp3.c:1922
static double c[64]
const VP56Frame ff_vp56_reference_frame[]
Definition: vp56data.c:70
static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
Definition: vp56.c:283
void * priv_data
Definition: avcodec.h:1788
int16_t dc_coeff
Definition: vp56.h:97
#define av_free(p)
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:3235
Inter MB, above/left vector + delta, from golden frame.
Definition: vp56.h:55
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
#define av_uninit(x)
Definition: attributes.h:148
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:39
#define FFSWAP(type, a, b)
Definition: common.h:99
#define stride
av_cold void ff_vp3dsp_init(VP3DSPContext *c, int flags)
Definition: vp3dsp.c:280
static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src, ptrdiff_t stride, int x, int y)
Definition: vp56.c:332
This structure stores compressed data.
Definition: avcodec.h:1648
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1396
for(j=16;j >0;--j)
Predicted.
Definition: avutil.h:275
#define TRANSPOSE(x)
static int vp56_rac_gets(VP56RangeCoder *c, int bits)
Definition: vp56.h:313