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avfiltergraph.c
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1 /*
2  * filter graphs
3  * Copyright (c) 2008 Vitor Sessak
4  * Copyright (c) 2007 Bobby Bingham
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 
25 #include <string.h>
26 
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/bprint.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 
35 #define FF_INTERNAL_FIELDS 1
36 #include "framequeue.h"
37 
38 #include "avfilter.h"
39 #include "buffersink.h"
40 #include "formats.h"
41 #include "internal.h"
42 #include "thread.h"
43 
44 #define OFFSET(x) offsetof(AVFilterGraph, x)
45 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
46 static const AVOption filtergraph_options[] = {
47  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
48  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
49  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
50  { "threads", "Maximum number of threads", OFFSET(nb_threads),
51  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
52  {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
53  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
54  {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
55  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
56  { NULL },
57 };
58 
59 static const AVClass filtergraph_class = {
60  .class_name = "AVFilterGraph",
61  .item_name = av_default_item_name,
62  .version = LIBAVUTIL_VERSION_INT,
63  .option = filtergraph_options,
64  .category = AV_CLASS_CATEGORY_FILTER,
65 };
66 
67 #if !HAVE_THREADS
69 {
70 }
71 
73 {
74  graph->thread_type = 0;
75  graph->nb_threads = 1;
76  return 0;
77 }
78 #endif
79 
81 {
82  AVFilterGraph *ret = av_mallocz(sizeof(*ret));
83  if (!ret)
84  return NULL;
85 
86  ret->internal = av_mallocz(sizeof(*ret->internal));
87  if (!ret->internal) {
88  av_freep(&ret);
89  return NULL;
90  }
91 
95 
96  return ret;
97 }
98 
100 {
101  int i, j;
102  for (i = 0; i < graph->nb_filters; i++) {
103  if (graph->filters[i] == filter) {
104  FFSWAP(AVFilterContext*, graph->filters[i],
105  graph->filters[graph->nb_filters - 1]);
106  graph->nb_filters--;
107  filter->graph = NULL;
108  for (j = 0; j<filter->nb_outputs; j++)
109  if (filter->outputs[j])
110  filter->outputs[j]->graph = NULL;
111 
112  return;
113  }
114  }
115 }
116 
118 {
119  if (!*graph)
120  return;
121 
122  while ((*graph)->nb_filters)
123  avfilter_free((*graph)->filters[0]);
124 
125  ff_graph_thread_free(*graph);
126 
127  av_freep(&(*graph)->sink_links);
128 
129  av_freep(&(*graph)->scale_sws_opts);
130  av_freep(&(*graph)->aresample_swr_opts);
131  av_freep(&(*graph)->resample_lavr_opts);
132  av_freep(&(*graph)->filters);
133  av_freep(&(*graph)->internal);
134  av_freep(graph);
135 }
136 
137 #if FF_API_AVFILTER_OPEN
138 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
139 {
141  sizeof(*filters) * (graph->nb_filters + 1));
142  if (!filters)
143  return AVERROR(ENOMEM);
144 
145  graph->filters = filters;
146  graph->filters[graph->nb_filters++] = filter;
147 
148  filter->graph = graph;
149 
150  return 0;
151 }
152 #endif
153 
155  const char *name, const char *args, void *opaque,
156  AVFilterGraph *graph_ctx)
157 {
158  int ret;
159 
160  *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
161  if (!*filt_ctx)
162  return AVERROR(ENOMEM);
163 
164  ret = avfilter_init_str(*filt_ctx, args);
165  if (ret < 0)
166  goto fail;
167 
168  return 0;
169 
170 fail:
171  if (*filt_ctx)
172  avfilter_free(*filt_ctx);
173  *filt_ctx = NULL;
174  return ret;
175 }
176 
178 {
179  graph->disable_auto_convert = flags;
180 }
181 
183  const AVFilter *filter,
184  const char *name)
185 {
187 
188  if (graph->thread_type && !graph->internal->thread_execute) {
189  if (graph->execute) {
190  graph->internal->thread_execute = graph->execute;
191  } else {
192  int ret = ff_graph_thread_init(graph);
193  if (ret < 0) {
194  av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
195  return NULL;
196  }
197  }
198  }
199 
200  s = ff_filter_alloc(filter, name);
201  if (!s)
202  return NULL;
203 
204  filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
205  if (!filters) {
206  avfilter_free(s);
207  return NULL;
208  }
209 
210  graph->filters = filters;
211  graph->filters[graph->nb_filters++] = s;
212 
213  s->graph = graph;
214 
215  return s;
216 }
217 
218 /**
219  * Check for the validity of graph.
220  *
221  * A graph is considered valid if all its input and output pads are
222  * connected.
223  *
224  * @return >= 0 in case of success, a negative value otherwise
225  */
226 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
227 {
229  int i, j;
230 
231  for (i = 0; i < graph->nb_filters; i++) {
232  const AVFilterPad *pad;
233  filt = graph->filters[i];
234 
235  for (j = 0; j < filt->nb_inputs; j++) {
236  if (!filt->inputs[j] || !filt->inputs[j]->src) {
237  pad = &filt->input_pads[j];
238  av_log(log_ctx, AV_LOG_ERROR,
239  "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
240  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
241  return AVERROR(EINVAL);
242  }
243  }
244 
245  for (j = 0; j < filt->nb_outputs; j++) {
246  if (!filt->outputs[j] || !filt->outputs[j]->dst) {
247  pad = &filt->output_pads[j];
248  av_log(log_ctx, AV_LOG_ERROR,
249  "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
250  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
251  return AVERROR(EINVAL);
252  }
253  }
254  }
255 
256  return 0;
257 }
258 
259 /**
260  * Configure all the links of graphctx.
261  *
262  * @return >= 0 in case of success, a negative value otherwise
263  */
264 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
265 {
267  int i, ret;
268 
269  for (i = 0; i < graph->nb_filters; i++) {
270  filt = graph->filters[i];
271 
272  if (!filt->nb_outputs) {
273  if ((ret = avfilter_config_links(filt)))
274  return ret;
275  }
276  }
277 
278  return 0;
279 }
280 
282 {
283  int i;
284 
285  for (i = 0; i < graph->nb_filters; i++)
286  if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
287  return graph->filters[i];
288 
289  return NULL;
290 }
291 
293 {
294  if (!l)
295  return;
296  if (l->nb_channel_layouts) {
297  if (l->all_layouts || l->all_counts)
298  av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
299  l->all_layouts = l->all_counts = 0;
300  } else {
301  if (l->all_counts && !l->all_layouts)
302  av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
303  l->all_layouts = 1;
304  }
305 }
306 
308 {
309  int ret, i;
311  AVFilterChannelLayouts *chlayouts;
312  AVFilterFormats *samplerates;
313  enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
314  ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
316 
317  if ((ret = ctx->filter->query_formats(ctx)) < 0) {
318  if (ret != AVERROR(EAGAIN))
319  av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
320  ctx->name, av_err2str(ret));
321  return ret;
322  }
323 
324  for (i = 0; i < ctx->nb_inputs; i++)
326  for (i = 0; i < ctx->nb_outputs; i++)
328 
329  formats = ff_all_formats(type);
330  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
331  return ret;
332  if (type == AVMEDIA_TYPE_AUDIO) {
333  samplerates = ff_all_samplerates();
334  if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
335  return ret;
336  chlayouts = ff_all_channel_layouts();
337  if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
338  return ret;
339  }
340  return 0;
341 }
342 
344 {
345  int i;
346 
347  for (i = 0; i < f->nb_inputs; i++) {
348  if (!f->inputs[i]->out_formats)
349  return 0;
350  if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
351  !(f->inputs[i]->out_samplerates &&
352  f->inputs[i]->out_channel_layouts))
353  return 0;
354  }
355  for (i = 0; i < f->nb_outputs; i++) {
356  if (!f->outputs[i]->in_formats)
357  return 0;
358  if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
359  !(f->outputs[i]->in_samplerates &&
360  f->outputs[i]->in_channel_layouts))
361  return 0;
362  }
363  return 1;
364 }
365 
367 {
368  AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
369  if (a) {
370  a->refcount = 0;
371  a->refs = NULL;
372  a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
373  if (!a->formats && arg->formats)
374  av_freep(&a);
375  }
376  return a;
377 }
378 
380  AVFilterFormats *b_arg,
381  enum AVMediaType type,
382  int is_sample_rate)
383 {
384  AVFilterFormats *a, *b, *ret;
385  if (a_arg == b_arg)
386  return 1;
387  a = clone_filter_formats(a_arg);
388  b = clone_filter_formats(b_arg);
389 
390  if (!a || !b) {
391  if (a)
392  av_freep(&a->formats);
393  if (b)
394  av_freep(&b->formats);
395 
396  av_freep(&a);
397  av_freep(&b);
398 
399  return 0;
400  }
401 
402  if (is_sample_rate) {
403  ret = ff_merge_samplerates(a, b);
404  } else {
405  ret = ff_merge_formats(a, b, type);
406  }
407  if (ret) {
408  av_freep(&ret->formats);
409  av_freep(&ret->refs);
410  av_freep(&ret);
411  return 1;
412  } else {
413  av_freep(&a->formats);
414  av_freep(&b->formats);
415  av_freep(&a);
416  av_freep(&b);
417  return 0;
418  }
419 }
420 
421 /**
422  * Perform one round of query_formats() and merging formats lists on the
423  * filter graph.
424  * @return >=0 if all links formats lists could be queried and merged;
425  * AVERROR(EAGAIN) some progress was made in the queries or merging
426  * and a later call may succeed;
427  * AVERROR(EIO) (may be changed) plus a log message if no progress
428  * was made and the negotiation is stuck;
429  * a negative error code if some other error happened
430  */
431 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
432 {
433  int i, j, ret;
434  int scaler_count = 0, resampler_count = 0;
435  int count_queried = 0; /* successful calls to query_formats() */
436  int count_merged = 0; /* successful merge of formats lists */
437  int count_already_merged = 0; /* lists already merged */
438  int count_delayed = 0; /* lists that need to be merged later */
439 
440  for (i = 0; i < graph->nb_filters; i++) {
441  AVFilterContext *f = graph->filters[i];
442  if (formats_declared(f))
443  continue;
444  if (f->filter->query_formats)
445  ret = filter_query_formats(f);
446  else
447  ret = ff_default_query_formats(f);
448  if (ret < 0 && ret != AVERROR(EAGAIN))
449  return ret;
450  /* note: EAGAIN could indicate a partial success, not counted yet */
451  count_queried += ret >= 0;
452  }
453 
454  /* go through and merge as many format lists as possible */
455  for (i = 0; i < graph->nb_filters; i++) {
456  AVFilterContext *filter = graph->filters[i];
457 
458  for (j = 0; j < filter->nb_inputs; j++) {
459  AVFilterLink *link = filter->inputs[j];
460  int convert_needed = 0;
461 
462  if (!link)
463  continue;
464 
465  if (link->in_formats != link->out_formats
466  && link->in_formats && link->out_formats)
467  if (!can_merge_formats(link->in_formats, link->out_formats,
468  link->type, 0))
469  convert_needed = 1;
470  if (link->type == AVMEDIA_TYPE_AUDIO) {
471  if (link->in_samplerates != link->out_samplerates
472  && link->in_samplerates && link->out_samplerates)
474  link->out_samplerates,
475  0, 1))
476  convert_needed = 1;
477  }
478 
479 #define MERGE_DISPATCH(field, statement) \
480  if (!(link->in_ ## field && link->out_ ## field)) { \
481  count_delayed++; \
482  } else if (link->in_ ## field == link->out_ ## field) { \
483  count_already_merged++; \
484  } else if (!convert_needed) { \
485  count_merged++; \
486  statement \
487  }
488 
489  if (link->type == AVMEDIA_TYPE_AUDIO) {
492  link->out_channel_layouts))
493  convert_needed = 1;
494  )
495  MERGE_DISPATCH(samplerates,
497  link->out_samplerates))
498  convert_needed = 1;
499  )
500  }
502  if (!ff_merge_formats(link->in_formats, link->out_formats,
503  link->type))
504  convert_needed = 1;
505  )
506 #undef MERGE_DISPATCH
507 
508  if (convert_needed) {
510  AVFilter *filter;
511  AVFilterLink *inlink, *outlink;
512  char scale_args[256];
513  char inst_name[30];
514 
515  if (graph->disable_auto_convert) {
516  av_log(log_ctx, AV_LOG_ERROR,
517  "The filters '%s' and '%s' do not have a common format "
518  "and automatic conversion is disabled.\n",
519  link->src->name, link->dst->name);
520  return AVERROR(EINVAL);
521  }
522 
523  /* couldn't merge format lists. auto-insert conversion filter */
524  switch (link->type) {
525  case AVMEDIA_TYPE_VIDEO:
526  if (!(filter = avfilter_get_by_name("scale"))) {
527  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
528  "not present, cannot convert pixel formats.\n");
529  return AVERROR(EINVAL);
530  }
531 
532  snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
533  scaler_count++);
534 
535  if ((ret = avfilter_graph_create_filter(&convert, filter,
536  inst_name, graph->scale_sws_opts, NULL,
537  graph)) < 0)
538  return ret;
539  break;
540  case AVMEDIA_TYPE_AUDIO:
541  if (!(filter = avfilter_get_by_name("aresample"))) {
542  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
543  "not present, cannot convert audio formats.\n");
544  return AVERROR(EINVAL);
545  }
546 
547  snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
548  resampler_count++);
549  scale_args[0] = '\0';
550  if (graph->aresample_swr_opts)
551  snprintf(scale_args, sizeof(scale_args), "%s",
552  graph->aresample_swr_opts);
553  if ((ret = avfilter_graph_create_filter(&convert, filter,
554  inst_name, graph->aresample_swr_opts,
555  NULL, graph)) < 0)
556  return ret;
557  break;
558  default:
559  return AVERROR(EINVAL);
560  }
561 
562  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
563  return ret;
564 
565  if ((ret = filter_query_formats(convert)) < 0)
566  return ret;
567 
568  inlink = convert->inputs[0];
569  outlink = convert->outputs[0];
570  av_assert0( inlink-> in_formats->refcount > 0);
571  av_assert0( inlink->out_formats->refcount > 0);
572  av_assert0(outlink-> in_formats->refcount > 0);
573  av_assert0(outlink->out_formats->refcount > 0);
574  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
575  av_assert0( inlink-> in_samplerates->refcount > 0);
576  av_assert0( inlink->out_samplerates->refcount > 0);
577  av_assert0(outlink-> in_samplerates->refcount > 0);
578  av_assert0(outlink->out_samplerates->refcount > 0);
579  av_assert0( inlink-> in_channel_layouts->refcount > 0);
580  av_assert0( inlink->out_channel_layouts->refcount > 0);
581  av_assert0(outlink-> in_channel_layouts->refcount > 0);
582  av_assert0(outlink->out_channel_layouts->refcount > 0);
583  }
584  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
585  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
586  ret = AVERROR(ENOSYS);
587  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
589  inlink->out_samplerates) ||
591  inlink->out_channel_layouts)))
592  ret = AVERROR(ENOSYS);
593  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
595  outlink->out_samplerates) ||
597  outlink->out_channel_layouts)))
598  ret = AVERROR(ENOSYS);
599 
600  if (ret < 0) {
601  av_log(log_ctx, AV_LOG_ERROR,
602  "Impossible to convert between the formats supported by the filter "
603  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
604  return ret;
605  }
606  }
607  }
608  }
609 
610  av_log(graph, AV_LOG_DEBUG, "query_formats: "
611  "%d queried, %d merged, %d already done, %d delayed\n",
612  count_queried, count_merged, count_already_merged, count_delayed);
613  if (count_delayed) {
614  AVBPrint bp;
615 
616  /* if count_queried > 0, one filter at least did set its formats,
617  that will give additional information to its neighbour;
618  if count_merged > 0, one pair of formats lists at least was merged,
619  that will give additional information to all connected filters;
620  in both cases, progress was made and a new round must be done */
621  if (count_queried || count_merged)
622  return AVERROR(EAGAIN);
624  for (i = 0; i < graph->nb_filters; i++)
625  if (!formats_declared(graph->filters[i]))
626  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
627  graph->filters[i]->name);
628  av_log(graph, AV_LOG_ERROR,
629  "The following filters could not choose their formats: %s\n"
630  "Consider inserting the (a)format filter near their input or "
631  "output.\n", bp.str);
632  return AVERROR(EIO);
633  }
634  return 0;
635 }
636 
637 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
638 {
639  int score = 0;
640 
641  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
642  score ++;
643 
644  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
645  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
646  }else
647  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
648 
651  score += 20;
652 
655  score += 2;
656 
657  return score;
658 }
659 
661  enum AVSampleFormat src_fmt)
662 {
663  int score1, score2;
664 
665  score1 = get_fmt_score(dst_fmt1, src_fmt);
666  score2 = get_fmt_score(dst_fmt2, src_fmt);
667 
668  return score1 < score2 ? dst_fmt1 : dst_fmt2;
669 }
670 
672 {
673  if (!link || !link->in_formats)
674  return 0;
675 
676  if (link->type == AVMEDIA_TYPE_VIDEO) {
677  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
678  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
679  enum AVPixelFormat best= AV_PIX_FMT_NONE;
680  int i;
681  for (i=0; i<link->in_formats->nb_formats; i++) {
682  enum AVPixelFormat p = link->in_formats->formats[i];
683  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
684  }
685  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
687  av_get_pix_fmt_name(ref->format), has_alpha);
688  link->in_formats->formats[0] = best;
689  }
690  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
691  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
693  int i;
694  for (i=0; i<link->in_formats->nb_formats; i++) {
695  enum AVSampleFormat p = link->in_formats->formats[i];
696  best = find_best_sample_fmt_of_2(best, p, ref->format);
697  }
698  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
701  link->in_formats->formats[0] = best;
702  }
703  }
704 
705  link->in_formats->nb_formats = 1;
706  link->format = link->in_formats->formats[0];
707 
708  if (link->type == AVMEDIA_TYPE_AUDIO) {
709  if (!link->in_samplerates->nb_formats) {
710  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
711  " the link between filters %s and %s.\n", link->src->name,
712  link->dst->name);
713  return AVERROR(EINVAL);
714  }
715  link->in_samplerates->nb_formats = 1;
716  link->sample_rate = link->in_samplerates->formats[0];
717 
718  if (link->in_channel_layouts->all_layouts) {
719  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
720  " the link between filters %s and %s.\n", link->src->name,
721  link->dst->name);
722  if (!link->in_channel_layouts->all_counts)
723  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
724  "supported, try specifying a channel layout using "
725  "'aformat=channel_layouts=something'.\n");
726  return AVERROR(EINVAL);
727  }
730  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
731  link->channel_layout = 0;
732  else
734  }
735 
742 
743  return 0;
744 }
745 
746 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
747 do { \
748  for (i = 0; i < filter->nb_inputs; i++) { \
749  AVFilterLink *link = filter->inputs[i]; \
750  fmt_type fmt; \
751  \
752  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
753  continue; \
754  fmt = link->out_ ## list->var[0]; \
755  \
756  for (j = 0; j < filter->nb_outputs; j++) { \
757  AVFilterLink *out_link = filter->outputs[j]; \
758  list_type *fmts; \
759  \
760  if (link->type != out_link->type || \
761  out_link->in_ ## list->nb == 1) \
762  continue; \
763  fmts = out_link->in_ ## list; \
764  \
765  if (!out_link->in_ ## list->nb) { \
766  if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
767  return ret; \
768  ret = 1; \
769  break; \
770  } \
771  \
772  for (k = 0; k < out_link->in_ ## list->nb; k++) \
773  if (fmts->var[k] == fmt) { \
774  fmts->var[0] = fmt; \
775  fmts->nb = 1; \
776  ret = 1; \
777  break; \
778  } \
779  } \
780  } \
781 } while (0)
782 
784 {
785  int i, j, k, ret = 0;
786 
788  nb_formats, ff_add_format, ff_formats_unref);
789  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
790  nb_formats, ff_add_format, ff_formats_unref);
791 
792  /* reduce channel layouts */
793  for (i = 0; i < filter->nb_inputs; i++) {
794  AVFilterLink *inlink = filter->inputs[i];
795  uint64_t fmt;
796 
797  if (!inlink->out_channel_layouts ||
799  continue;
800  fmt = inlink->out_channel_layouts->channel_layouts[0];
801 
802  for (j = 0; j < filter->nb_outputs; j++) {
803  AVFilterLink *outlink = filter->outputs[j];
805 
806  fmts = outlink->in_channel_layouts;
807  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
808  continue;
809 
810  if (fmts->all_layouts &&
811  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
812  /* Turn the infinite list into a singleton */
813  fmts->all_layouts = fmts->all_counts = 0;
814  if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
815  ret = 1;
816  break;
817  }
818 
819  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
820  if (fmts->channel_layouts[k] == fmt) {
821  fmts->channel_layouts[0] = fmt;
822  fmts->nb_channel_layouts = 1;
823  ret = 1;
824  break;
825  }
826  }
827  }
828  }
829 
830  return ret;
831 }
832 
833 static int reduce_formats(AVFilterGraph *graph)
834 {
835  int i, reduced, ret;
836 
837  do {
838  reduced = 0;
839 
840  for (i = 0; i < graph->nb_filters; i++) {
841  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
842  return ret;
843  reduced |= ret;
844  }
845  } while (reduced);
846 
847  return 0;
848 }
849 
851 {
852  AVFilterLink *link = NULL;
853  int sample_rate;
854  int i, j;
855 
856  for (i = 0; i < filter->nb_inputs; i++) {
857  link = filter->inputs[i];
858 
859  if (link->type == AVMEDIA_TYPE_AUDIO &&
860  link->out_samplerates->nb_formats== 1)
861  break;
862  }
863  if (i == filter->nb_inputs)
864  return;
865 
866  sample_rate = link->out_samplerates->formats[0];
867 
868  for (i = 0; i < filter->nb_outputs; i++) {
869  AVFilterLink *outlink = filter->outputs[i];
870  int best_idx, best_diff = INT_MAX;
871 
872  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
873  outlink->in_samplerates->nb_formats < 2)
874  continue;
875 
876  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
877  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
878 
879  av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
880 
881  if (diff < best_diff) {
882  best_diff = diff;
883  best_idx = j;
884  }
885  }
886  FFSWAP(int, outlink->in_samplerates->formats[0],
887  outlink->in_samplerates->formats[best_idx]);
888  }
889 }
890 
891 static void swap_samplerates(AVFilterGraph *graph)
892 {
893  int i;
894 
895  for (i = 0; i < graph->nb_filters; i++)
897 }
898 
899 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
900 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
901 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
902 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
903 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
904 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
905 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
906 
907 /* allowable substitutions for channel pairs when comparing layouts,
908  * ordered by priority for both values */
909 static const uint64_t ch_subst[][2] = {
931 };
932 
934 {
935  AVFilterLink *link = NULL;
936  int i, j, k;
937 
938  for (i = 0; i < filter->nb_inputs; i++) {
939  link = filter->inputs[i];
940 
941  if (link->type == AVMEDIA_TYPE_AUDIO &&
943  break;
944  }
945  if (i == filter->nb_inputs)
946  return;
947 
948  for (i = 0; i < filter->nb_outputs; i++) {
949  AVFilterLink *outlink = filter->outputs[i];
950  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
951 
952  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
954  continue;
955 
956  for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
957  uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
958  uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
959  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
960  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
961  int count_diff = out_channels - in_channels;
962  int matched_channels, extra_channels;
963  int score = 100000;
964 
965  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
966  /* Compute score in case the input or output layout encodes
967  a channel count; in this case the score is not altered by
968  the computation afterwards, as in_chlayout and
969  out_chlayout have both been set to 0 */
970  if (FF_LAYOUT2COUNT(in_chlayout))
971  in_channels = FF_LAYOUT2COUNT(in_chlayout);
972  if (FF_LAYOUT2COUNT(out_chlayout))
973  out_channels = FF_LAYOUT2COUNT(out_chlayout);
974  score -= 10000 + FFABS(out_channels - in_channels) +
975  (in_channels > out_channels ? 10000 : 0);
976  in_chlayout = out_chlayout = 0;
977  /* Let the remaining computation run, even if the score
978  value is not altered */
979  }
980 
981  /* channel substitution */
982  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
983  uint64_t cmp0 = ch_subst[k][0];
984  uint64_t cmp1 = ch_subst[k][1];
985  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
986  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
987  in_chlayout &= ~cmp0;
988  out_chlayout &= ~cmp1;
989  /* add score for channel match, minus a deduction for
990  having to do the substitution */
991  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
992  }
993  }
994 
995  /* no penalty for LFE channel mismatch */
996  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
997  (out_chlayout & AV_CH_LOW_FREQUENCY))
998  score += 10;
999  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1000  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1001 
1002  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1003  out_chlayout);
1004  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1005  (~in_chlayout));
1006  score += 10 * matched_channels - 5 * extra_channels;
1007 
1008  if (score > best_score ||
1009  (count_diff < best_count_diff && score == best_score)) {
1010  best_score = score;
1011  best_idx = j;
1012  best_count_diff = count_diff;
1013  }
1014  }
1015  av_assert0(best_idx >= 0);
1016  FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1017  outlink->in_channel_layouts->channel_layouts[best_idx]);
1018  }
1019 
1020 }
1021 
1023 {
1024  int i;
1025 
1026  for (i = 0; i < graph->nb_filters; i++)
1028 }
1029 
1031 {
1032  AVFilterLink *link = NULL;
1033  int format, bps;
1034  int i, j;
1035 
1036  for (i = 0; i < filter->nb_inputs; i++) {
1037  link = filter->inputs[i];
1038 
1039  if (link->type == AVMEDIA_TYPE_AUDIO &&
1040  link->out_formats->nb_formats == 1)
1041  break;
1042  }
1043  if (i == filter->nb_inputs)
1044  return;
1045 
1046  format = link->out_formats->formats[0];
1047  bps = av_get_bytes_per_sample(format);
1048 
1049  for (i = 0; i < filter->nb_outputs; i++) {
1050  AVFilterLink *outlink = filter->outputs[i];
1051  int best_idx = -1, best_score = INT_MIN;
1052 
1053  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1054  outlink->in_formats->nb_formats < 2)
1055  continue;
1056 
1057  for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1058  int out_format = outlink->in_formats->formats[j];
1059  int out_bps = av_get_bytes_per_sample(out_format);
1060  int score;
1061 
1062  if (av_get_packed_sample_fmt(out_format) == format ||
1063  av_get_planar_sample_fmt(out_format) == format) {
1064  best_idx = j;
1065  break;
1066  }
1067 
1068  /* for s32 and float prefer double to prevent loss of information */
1069  if (bps == 4 && out_bps == 8) {
1070  best_idx = j;
1071  break;
1072  }
1073 
1074  /* prefer closest higher or equal bps */
1075  score = -abs(out_bps - bps);
1076  if (out_bps >= bps)
1077  score += INT_MAX/2;
1078 
1079  if (score > best_score) {
1080  best_score = score;
1081  best_idx = j;
1082  }
1083  }
1084  av_assert0(best_idx >= 0);
1085  FFSWAP(int, outlink->in_formats->formats[0],
1086  outlink->in_formats->formats[best_idx]);
1087  }
1088 }
1089 
1090 static void swap_sample_fmts(AVFilterGraph *graph)
1091 {
1092  int i;
1093 
1094  for (i = 0; i < graph->nb_filters; i++)
1096 
1097 }
1098 
1099 static int pick_formats(AVFilterGraph *graph)
1100 {
1101  int i, j, ret;
1102  int change;
1103 
1104  do{
1105  change = 0;
1106  for (i = 0; i < graph->nb_filters; i++) {
1107  AVFilterContext *filter = graph->filters[i];
1108  if (filter->nb_inputs){
1109  for (j = 0; j < filter->nb_inputs; j++){
1110  if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1111  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1112  return ret;
1113  change = 1;
1114  }
1115  }
1116  }
1117  if (filter->nb_outputs){
1118  for (j = 0; j < filter->nb_outputs; j++){
1119  if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1120  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1121  return ret;
1122  change = 1;
1123  }
1124  }
1125  }
1126  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1127  for (j = 0; j < filter->nb_outputs; j++) {
1128  if(filter->outputs[j]->format<0) {
1129  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1130  return ret;
1131  change = 1;
1132  }
1133  }
1134  }
1135  }
1136  }while(change);
1137 
1138  for (i = 0; i < graph->nb_filters; i++) {
1139  AVFilterContext *filter = graph->filters[i];
1140 
1141  for (j = 0; j < filter->nb_inputs; j++)
1142  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1143  return ret;
1144  for (j = 0; j < filter->nb_outputs; j++)
1145  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1146  return ret;
1147  }
1148  return 0;
1149 }
1150 
1151 /**
1152  * Configure the formats of all the links in the graph.
1153  */
1154 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1155 {
1156  int ret;
1157 
1158  /* find supported formats from sub-filters, and merge along links */
1159  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1160  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1161  if (ret < 0)
1162  return ret;
1163 
1164  /* Once everything is merged, it's possible that we'll still have
1165  * multiple valid media format choices. We try to minimize the amount
1166  * of format conversion inside filters */
1167  if ((ret = reduce_formats(graph)) < 0)
1168  return ret;
1169 
1170  /* for audio filters, ensure the best format, sample rate and channel layout
1171  * is selected */
1172  swap_sample_fmts(graph);
1173  swap_samplerates(graph);
1174  swap_channel_layouts(graph);
1175 
1176  if ((ret = pick_formats(graph)) < 0)
1177  return ret;
1178 
1179  return 0;
1180 }
1181 
1183  AVClass *log_ctx)
1184 {
1185  unsigned i, j;
1186  int sink_links_count = 0, n = 0;
1187  AVFilterContext *f;
1188  AVFilterLink **sinks;
1189 
1190  for (i = 0; i < graph->nb_filters; i++) {
1191  f = graph->filters[i];
1192  for (j = 0; j < f->nb_inputs; j++) {
1193  f->inputs[j]->graph = graph;
1194  f->inputs[j]->age_index = -1;
1195  }
1196  for (j = 0; j < f->nb_outputs; j++) {
1197  f->outputs[j]->graph = graph;
1198  f->outputs[j]->age_index= -1;
1199  }
1200  if (!f->nb_outputs) {
1201  if (f->nb_inputs > INT_MAX - sink_links_count)
1202  return AVERROR(EINVAL);
1203  sink_links_count += f->nb_inputs;
1204  }
1205  }
1206  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1207  if (!sinks)
1208  return AVERROR(ENOMEM);
1209  for (i = 0; i < graph->nb_filters; i++) {
1210  f = graph->filters[i];
1211  if (!f->nb_outputs) {
1212  for (j = 0; j < f->nb_inputs; j++) {
1213  sinks[n] = f->inputs[j];
1214  f->inputs[j]->age_index = n++;
1215  }
1216  }
1217  }
1218  av_assert0(n == sink_links_count);
1219  graph->sink_links = sinks;
1220  graph->sink_links_count = sink_links_count;
1221  return 0;
1222 }
1223 
1224 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1225 {
1226  AVFilterContext *f;
1227  int i, j, ret;
1228  int fifo_count = 0;
1229 
1230  for (i = 0; i < graph->nb_filters; i++) {
1231  f = graph->filters[i];
1232 
1233  for (j = 0; j < f->nb_inputs; j++) {
1234  AVFilterLink *link = f->inputs[j];
1235  AVFilterContext *fifo_ctx;
1236  AVFilter *fifo;
1237  char name[32];
1238 
1239  if (!link->dstpad->needs_fifo)
1240  continue;
1241 
1242  fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1243  avfilter_get_by_name("fifo") :
1244  avfilter_get_by_name("afifo");
1245 
1246  snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1247 
1248  ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1249  NULL, graph);
1250  if (ret < 0)
1251  return ret;
1252 
1253  ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1254  if (ret < 0)
1255  return ret;
1256  }
1257  }
1258 
1259  return 0;
1260 }
1261 
1262 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1263 {
1264  int ret;
1265 
1266  if ((ret = graph_check_validity(graphctx, log_ctx)))
1267  return ret;
1268  if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1269  return ret;
1270  if ((ret = graph_config_formats(graphctx, log_ctx)))
1271  return ret;
1272  if ((ret = graph_config_links(graphctx, log_ctx)))
1273  return ret;
1274  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1275  return ret;
1276 
1277  return 0;
1278 }
1279 
1280 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1281 {
1282  int i, r = AVERROR(ENOSYS);
1283 
1284  if (!graph)
1285  return r;
1286 
1287  if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1288  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1289  if (r != AVERROR(ENOSYS))
1290  return r;
1291  }
1292 
1293  if (res_len && res)
1294  res[0] = 0;
1295 
1296  for (i = 0; i < graph->nb_filters; i++) {
1297  AVFilterContext *filter = graph->filters[i];
1298  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1299  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1300  if (r != AVERROR(ENOSYS)) {
1301  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1302  return r;
1303  }
1304  }
1305  }
1306 
1307  return r;
1308 }
1309 
1310 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1311 {
1312  int i;
1313 
1314  if(!graph)
1315  return 0;
1316 
1317  for (i = 0; i < graph->nb_filters; i++) {
1318  AVFilterContext *filter = graph->filters[i];
1319  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1320  AVFilterCommand **queue = &filter->command_queue, *next;
1321  while (*queue && (*queue)->time <= ts)
1322  queue = &(*queue)->next;
1323  next = *queue;
1324  *queue = av_mallocz(sizeof(AVFilterCommand));
1325  (*queue)->command = av_strdup(command);
1326  (*queue)->arg = av_strdup(arg);
1327  (*queue)->time = ts;
1328  (*queue)->flags = flags;
1329  (*queue)->next = next;
1330  if(flags & AVFILTER_CMD_FLAG_ONE)
1331  return 0;
1332  }
1333  }
1334 
1335  return 0;
1336 }
1337 
1338 static void heap_bubble_up(AVFilterGraph *graph,
1339  AVFilterLink *link, int index)
1340 {
1341  AVFilterLink **links = graph->sink_links;
1342 
1343  av_assert0(index >= 0);
1344 
1345  while (index) {
1346  int parent = (index - 1) >> 1;
1347  if (links[parent]->current_pts_us >= link->current_pts_us)
1348  break;
1349  links[index] = links[parent];
1350  links[index]->age_index = index;
1351  index = parent;
1352  }
1353  links[index] = link;
1354  link->age_index = index;
1355 }
1356 
1357 static void heap_bubble_down(AVFilterGraph *graph,
1358  AVFilterLink *link, int index)
1359 {
1360  AVFilterLink **links = graph->sink_links;
1361 
1362  av_assert0(index >= 0);
1363 
1364  while (1) {
1365  int child = 2 * index + 1;
1366  if (child >= graph->sink_links_count)
1367  break;
1368  if (child + 1 < graph->sink_links_count &&
1369  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1370  child++;
1371  if (link->current_pts_us < links[child]->current_pts_us)
1372  break;
1373  links[index] = links[child];
1374  links[index]->age_index = index;
1375  index = child;
1376  }
1377  links[index] = link;
1378  link->age_index = index;
1379 }
1380 
1382 {
1383  heap_bubble_up (graph, link, link->age_index);
1384  heap_bubble_down(graph, link, link->age_index);
1385 }
1386 
1388 {
1389  AVFilterLink *oldest = graph->sink_links[0];
1390  int64_t frame_count;
1391  int r;
1392 
1393  while (graph->sink_links_count) {
1394  oldest = graph->sink_links[0];
1395  if (oldest->dst->filter->activate) {
1396  /* For now, buffersink is the only filter implementing activate. */
1397  return av_buffersink_get_frame_flags(oldest->dst, NULL,
1399  }
1400  r = ff_request_frame(oldest);
1401  if (r != AVERROR_EOF)
1402  break;
1403  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1404  oldest->dst ? oldest->dst->name : "unknown",
1405  oldest->dstpad ? oldest->dstpad->name : "unknown");
1406  /* EOF: remove the link from the heap */
1407  if (oldest->age_index < --graph->sink_links_count)
1408  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1409  oldest->age_index);
1410  oldest->age_index = -1;
1411  }
1412  if (!graph->sink_links_count)
1413  return AVERROR_EOF;
1414  av_assert1(!oldest->dst->filter->activate);
1415  av_assert1(oldest->age_index >= 0);
1416  frame_count = oldest->frame_count_out;
1417  while (frame_count == oldest->frame_count_out) {
1418  r = ff_filter_graph_run_once(graph);
1419  if (r == AVERROR(EAGAIN) &&
1420  !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1421  !oldest->status_in)
1422  ff_request_frame(oldest);
1423  else if (r < 0)
1424  return r;
1425  }
1426  return 0;
1427 }
1428 
1430 {
1432  unsigned i;
1433 
1434  av_assert0(graph->nb_filters);
1435  filter = graph->filters[0];
1436  for (i = 1; i < graph->nb_filters; i++)
1437  if (graph->filters[i]->ready > filter->ready)
1438  filter = graph->filters[i];
1439  if (!filter->ready)
1440  return AVERROR(EAGAIN);
1441  return ff_filter_activate(filter);
1442 }
AVFilterContext ** filters
Definition: avfilter.h:840
void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
Enable or disable automatic format conversion inside the graph.
#define NULL
Definition: coverity.c:32
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:549
const char * s
Definition: avisynth_c.h:768
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
int sink_links_count
Definition: avfilter.h:903
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:694
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2332
int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
Queue a command for one or more filter instances.
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:858
static void swap_samplerates(AVFilterGraph *graph)
AVOption.
Definition: opt.h:246
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:145
static void swap_sample_fmts(AVFilterGraph *graph)
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:791
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
const char * fmt
Definition: avisynth_c.h:769
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:80
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Main libavfilter public API header.
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
Check validity and configure all the links and formats in the graph.
struct AVFilterInOut * next
next input/input in the list, NULL if this is the last
Definition: avfilter.h:1024
static int reduce_formats(AVFilterGraph *graph)
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1293
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:113
static enum AVSampleFormat formats[]
Definition: avresample.c:163
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
static int reduce_formats_on_filter(AVFilterContext *filter)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
int(* query_formats)(AVFilterContext *)
Query formats supported by the filter on its inputs and outputs.
Definition: avfilter.h:267
static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:843
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:260
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:316
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:338
#define OFFSET(x)
Definition: avfiltergraph.c:44
memory buffer sink API for audio and video
const char * name
Pad name.
Definition: internal.h:60
static int pick_format(AVFilterLink *link, AVFilterLink *ref)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
int ff_filter_graph_run_once(AVFilterGraph *graph)
Run one round of processing on a filter graph.
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:329
char * name
name of this filter instance
Definition: avfilter.h:326
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
avfilter_execute_func * execute
This callback may be set by the caller immediately after allocating the graph and before adding any f...
Definition: avfilter.h:891
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:332
unsigned ready
Ready status of the filter.
Definition: avfilter.h:391
AVOptions.
#define FF_LAYOUT2COUNT(l)
Decode a channel count encoded as a channel layout.
Definition: formats.h:108
AVS_FilterInfo AVS_Value child
Definition: avisynth_c.h:731
struct AVFilterFormats *** refs
references to this list
Definition: formats.h:69
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:80
#define AV_CH_LOW_FREQUENCY
int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx)
Create and add a filter instance into an existing graph.
static int pick_formats(AVFilterGraph *graph)
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:865
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:275
static int flags
Definition: log.c:57
#define AVERROR_EOF
End of file.
Definition: error.h:55
AVFilterContext * avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
Get a filter instance identified by instance name from graph.
enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt)
Get the planar alternative form of the given sample format.
Definition: samplefmt.c:84
signed 32 bits
Definition: samplefmt.h:62
#define av_log(a,...)
AVFilterFormats * ff_all_formats(enum AVMediaType type)
Return a list of all formats supported by FFmpeg for the given media type.
Definition: formats.c:350
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
A filter pad used for either input or output.
Definition: internal.h:54
unsigned refcount
number of references to this list
Definition: formats.h:68
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:328
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
#define FLAGS
Definition: avfiltergraph.c:45
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
const AVClass * av_class
Definition: avfilter.h:839
unsigned nb_outputs
number of output pads
Definition: avfilter.h:334
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
const char * r
Definition: vf_curves.c:111
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
uint64_t * channel_layouts
list of channel layouts
Definition: formats.h:86
const char * arg
Definition: jacosubdec.c:66
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
static void heap_bubble_down(AVFilterGraph *graph, AVFilterLink *link, int index)
#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format)
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:299
AVFilterLink ** sink_links
Private fields.
Definition: avfilter.h:902
int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
Get a frame with filtered data from sink and put it in frame.
Definition: buffersink.c:119
#define CH_DIRECT_PAIR
#define fail()
Definition: checkasm.h:84
char all_counts
accept any channel layout or count
Definition: formats.h:89
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:566
common internal API header
static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
Configure the formats of all the links in the graph.
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
audio channel layout utility functions
static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
unsigned nb_inputs
number of input pads
Definition: avfilter.h:330
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
static void swap_sample_fmts_on_filter(AVFilterContext *filter)
struct AVFilterCommand * next
Definition: internal.h:43
#define CH_CENTER_PAIR
static const AVOption filtergraph_options[]
Definition: avfiltergraph.c:46
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
AVFormatContext * ctx
Definition: movenc.c:48
static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
Check for the validity of graph.
static int convert(uint8_t x)
Definition: xbmdec.c:29
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
unsigned nb_formats
number of formats
Definition: formats.h:65
int n
Definition: avisynth_c.h:684
#define AVFILTER_CMD_FLAG_ONE
Stop once a filter understood the command (for target=all for example), fast filters are favored auto...
Definition: avfilter.h:654
#define AV_CH_FRONT_CENTER
static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2, enum AVSampleFormat src_fmt)
static AVFilterFormats * clone_filter_formats(AVFilterFormats *arg)
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:401
static int can_merge_formats(AVFilterFormats *a_arg, AVFilterFormats *b_arg, enum AVMediaType type, int is_sample_rate)
#define FF_ARRAY_ELEMS(a)
A list of supported channel layouts.
Definition: formats.h:85
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:962
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
Insert a filter in the middle of an existing link.
Definition: avfilter.c:238
void ff_graph_thread_free(AVFilterGraph *graph)
Definition: avfiltergraph.c:68
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:597
sample_rate
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static void heap_bubble_up(AVFilterGraph *graph, AVFilterLink *link, int index)
static int formats_declared(AVFilterContext *f)
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:870
char all_layouts
accept any known channel layout
Definition: formats.h:88
AVFilterChannelLayouts * ff_merge_channel_layouts(AVFilterChannelLayouts *a, AVFilterChannelLayouts *b)
Return a channel layouts/samplerates list which contains the intersection of the layouts/samplerates ...
Definition: formats.c:166
AVFilterFormats * ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b, enum AVMediaType type)
Return a format list which contains the intersection of the formats of a and b.
Definition: formats.c:92
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_drawtext.c:769
void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
Update the position of a link in the age heap.
void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
Remove a reference to a channel layouts list.
Definition: formats.c:481
int avfilter_graph_request_oldest(AVFilterGraph *graph)
Request a frame on the oldest sink link.
int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
Make the filter instance process a command.
Definition: avfilter.c:539
GLint GLenum type
Definition: opengl_enc.c:105
static const char * format
Definition: movenc.c:47
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:118
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
int index
Definition: gxfenc.c:89
#define AVFILTER_CMD_FLAG_FAST
Only execute command when its fast (like a video out that supports contrast adjustment in hw) ...
Definition: avfilter.h:655
#define CH_BACK_PAIR
AVMediaType
Definition: avutil.h:199
void ff_formats_unref(AVFilterFormats **ref)
If *ref is non-NULL, remove *ref as a reference to the format list it currently points to...
Definition: formats.c:476
const char * name
Filter name.
Definition: avfilter.h:148
unsigned nb_filters
Definition: avfilter.h:841
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:333
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
static const int8_t filt[NUMTAPS]
Definition: af_earwax.c:39
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:79
#define AV_CH_BACK_CENTER
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
Perform one round of query_formats() and merging formats lists on the filter graph.
int ff_graph_thread_init(AVFilterGraph *graph)
Definition: avfiltergraph.c:72
static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
Configure all the links of graphctx.
static void swap_channel_layouts(AVFilterGraph *graph)
#define MERGE_DISPATCH(field, statement)
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
Get the packed alternative form of the given sample format.
Definition: samplefmt.c:75
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
int nb_channel_layouts
number of channel layouts
Definition: formats.h:87
#define CH_FRONT_PAIR
struct AVFilterCommand * command_queue
Definition: avfilter.h:363
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
Send a command to one or more filter instances.
unsigned bps
Definition: movenc.c:1413
enum AVPixelFormat av_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Compute what kind of losses will occur when converting from one specific pixel format to another...
Definition: pixdesc.c:2614
static void swap_samplerates_on_filter(AVFilterContext *filter)
char * aresample_swr_opts
swr options to use for the auto-inserted aresample filters, Access ONLY through AVOptions ...
Definition: avfilter.h:893
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
Remove a filter from a graph;.
Definition: avfiltergraph.c:99
#define AV_BUFFERSINK_FLAG_PEEK
Tell av_buffersink_get_buffer_ref() to read video/samples buffer reference, but not remove it from th...
Definition: buffersink.h:53
static av_always_inline int diff(const uint32_t a, const uint32_t b)
avfilter_execute_func * thread_execute
Definition: internal.h:150
AVFilterContext * avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name)
Create a new filter instance in a filter graph.
static const struct PPFilter filters[]
Definition: postprocess.c:137
unsigned refcount
number of references to this list
Definition: formats.h:91
A list of supported formats for one end of a filter link.
Definition: formats.h:64
void ff_framequeue_global_init(FFFrameQueueGlobal *fqg)
Init a global structure.
Definition: framequeue.c:30
static const AVClass filtergraph_class
Definition: avfiltergraph.c:59
An instance of a filter.
Definition: avfilter.h:321
#define av_freep(p)
#define CH_SIDE_PAIR
FFFrameQueueGlobal frame_queues
Definition: internal.h:151
double time
time expressed in seconds
Definition: internal.h:39
int needs_fifo
The filter expects a fifo to be inserted on its input link, typically because it has a delay...
Definition: internal.h:137
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
#define FFSWAP(type, a, b)
Definition: common.h:99
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2248
static int filter_query_formats(AVFilterContext *ctx)
AVFilterFormats * ff_merge_samplerates(AVFilterFormats *a, AVFilterFormats *b)
Definition: formats.c:139
internal API functions
int ff_filter_activate(AVFilterContext *filter)
Definition: avfilter.c:1476
int(* activate)(AVFilterContext *ctx)
Filter activation function.
Definition: avfilter.h:310
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
#define CH_WIDE_PAIR
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:324
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
unsigned disable_auto_convert
Definition: avfilter.h:905
static int graph_config_pointers(AVFilterGraph *graph, AVClass *log_ctx)
const char * name
Definition: opengl_enc.c:103
int * formats
list of media formats
Definition: formats.h:66