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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 #if FF_API_LAVR_OPTS
132  av_freep(&(*graph)->resample_lavr_opts);
133 #endif
134  av_freep(&(*graph)->filters);
135  av_freep(&(*graph)->internal);
136  av_freep(graph);
137 }
138 
139 #if FF_API_AVFILTER_OPEN
140 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
141 {
143  sizeof(*filters) * (graph->nb_filters + 1));
144  if (!filters)
145  return AVERROR(ENOMEM);
146 
147  graph->filters = filters;
148  graph->filters[graph->nb_filters++] = filter;
149 
150  filter->graph = graph;
151 
152  return 0;
153 }
154 #endif
155 
157  const char *name, const char *args, void *opaque,
158  AVFilterGraph *graph_ctx)
159 {
160  int ret;
161 
162  *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
163  if (!*filt_ctx)
164  return AVERROR(ENOMEM);
165 
166  ret = avfilter_init_str(*filt_ctx, args);
167  if (ret < 0)
168  goto fail;
169 
170  return 0;
171 
172 fail:
173  if (*filt_ctx)
174  avfilter_free(*filt_ctx);
175  *filt_ctx = NULL;
176  return ret;
177 }
178 
180 {
181  graph->disable_auto_convert = flags;
182 }
183 
185  const AVFilter *filter,
186  const char *name)
187 {
189 
190  if (graph->thread_type && !graph->internal->thread_execute) {
191  if (graph->execute) {
192  graph->internal->thread_execute = graph->execute;
193  } else {
194  int ret = ff_graph_thread_init(graph);
195  if (ret < 0) {
196  av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret));
197  return NULL;
198  }
199  }
200  }
201 
202  s = ff_filter_alloc(filter, name);
203  if (!s)
204  return NULL;
205 
206  filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
207  if (!filters) {
208  avfilter_free(s);
209  return NULL;
210  }
211 
212  graph->filters = filters;
213  graph->filters[graph->nb_filters++] = s;
214 
215  s->graph = graph;
216 
217  return s;
218 }
219 
220 /**
221  * Check for the validity of graph.
222  *
223  * A graph is considered valid if all its input and output pads are
224  * connected.
225  *
226  * @return >= 0 in case of success, a negative value otherwise
227  */
228 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
229 {
231  int i, j;
232 
233  for (i = 0; i < graph->nb_filters; i++) {
234  const AVFilterPad *pad;
235  filt = graph->filters[i];
236 
237  for (j = 0; j < filt->nb_inputs; j++) {
238  if (!filt->inputs[j] || !filt->inputs[j]->src) {
239  pad = &filt->input_pads[j];
240  av_log(log_ctx, AV_LOG_ERROR,
241  "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
242  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
243  return AVERROR(EINVAL);
244  }
245  }
246 
247  for (j = 0; j < filt->nb_outputs; j++) {
248  if (!filt->outputs[j] || !filt->outputs[j]->dst) {
249  pad = &filt->output_pads[j];
250  av_log(log_ctx, AV_LOG_ERROR,
251  "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
252  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
253  return AVERROR(EINVAL);
254  }
255  }
256  }
257 
258  return 0;
259 }
260 
261 /**
262  * Configure all the links of graphctx.
263  *
264  * @return >= 0 in case of success, a negative value otherwise
265  */
266 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
267 {
269  int i, ret;
270 
271  for (i = 0; i < graph->nb_filters; i++) {
272  filt = graph->filters[i];
273 
274  if (!filt->nb_outputs) {
275  if ((ret = avfilter_config_links(filt)))
276  return ret;
277  }
278  }
279 
280  return 0;
281 }
282 
284 {
285  int i;
286 
287  for (i = 0; i < graph->nb_filters; i++)
288  if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
289  return graph->filters[i];
290 
291  return NULL;
292 }
293 
295 {
296  if (!l)
297  return;
298  if (l->nb_channel_layouts) {
299  if (l->all_layouts || l->all_counts)
300  av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
301  l->all_layouts = l->all_counts = 0;
302  } else {
303  if (l->all_counts && !l->all_layouts)
304  av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
305  l->all_layouts = 1;
306  }
307 }
308 
310 {
311  int ret, i;
313  AVFilterChannelLayouts *chlayouts;
314  AVFilterFormats *samplerates;
315  enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
316  ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
318 
319  if ((ret = ctx->filter->query_formats(ctx)) < 0) {
320  if (ret != AVERROR(EAGAIN))
321  av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
322  ctx->name, av_err2str(ret));
323  return ret;
324  }
325 
326  for (i = 0; i < ctx->nb_inputs; i++)
328  for (i = 0; i < ctx->nb_outputs; i++)
330 
331  formats = ff_all_formats(type);
332  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
333  return ret;
334  if (type == AVMEDIA_TYPE_AUDIO) {
335  samplerates = ff_all_samplerates();
336  if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
337  return ret;
338  chlayouts = ff_all_channel_layouts();
339  if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
340  return ret;
341  }
342  return 0;
343 }
344 
346 {
347  int i;
348 
349  for (i = 0; i < f->nb_inputs; i++) {
350  if (!f->inputs[i]->out_formats)
351  return 0;
352  if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
353  !(f->inputs[i]->out_samplerates &&
354  f->inputs[i]->out_channel_layouts))
355  return 0;
356  }
357  for (i = 0; i < f->nb_outputs; i++) {
358  if (!f->outputs[i]->in_formats)
359  return 0;
360  if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
361  !(f->outputs[i]->in_samplerates &&
362  f->outputs[i]->in_channel_layouts))
363  return 0;
364  }
365  return 1;
366 }
367 
369 {
370  AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
371  if (a) {
372  a->refcount = 0;
373  a->refs = NULL;
374  a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
375  if (!a->formats && arg->formats)
376  av_freep(&a);
377  }
378  return a;
379 }
380 
382  AVFilterFormats *b_arg,
383  enum AVMediaType type,
384  int is_sample_rate)
385 {
386  AVFilterFormats *a, *b, *ret;
387  if (a_arg == b_arg)
388  return 1;
389  a = clone_filter_formats(a_arg);
390  b = clone_filter_formats(b_arg);
391 
392  if (!a || !b) {
393  if (a)
394  av_freep(&a->formats);
395  if (b)
396  av_freep(&b->formats);
397 
398  av_freep(&a);
399  av_freep(&b);
400 
401  return 0;
402  }
403 
404  if (is_sample_rate) {
405  ret = ff_merge_samplerates(a, b);
406  } else {
407  ret = ff_merge_formats(a, b, type);
408  }
409  if (ret) {
410  av_freep(&ret->formats);
411  av_freep(&ret->refs);
412  av_freep(&ret);
413  return 1;
414  } else {
415  av_freep(&a->formats);
416  av_freep(&b->formats);
417  av_freep(&a);
418  av_freep(&b);
419  return 0;
420  }
421 }
422 
423 /**
424  * Perform one round of query_formats() and merging formats lists on the
425  * filter graph.
426  * @return >=0 if all links formats lists could be queried and merged;
427  * AVERROR(EAGAIN) some progress was made in the queries or merging
428  * and a later call may succeed;
429  * AVERROR(EIO) (may be changed) plus a log message if no progress
430  * was made and the negotiation is stuck;
431  * a negative error code if some other error happened
432  */
433 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
434 {
435  int i, j, ret;
436  int scaler_count = 0, resampler_count = 0;
437  int count_queried = 0; /* successful calls to query_formats() */
438  int count_merged = 0; /* successful merge of formats lists */
439  int count_already_merged = 0; /* lists already merged */
440  int count_delayed = 0; /* lists that need to be merged later */
441 
442  for (i = 0; i < graph->nb_filters; i++) {
443  AVFilterContext *f = graph->filters[i];
444  if (formats_declared(f))
445  continue;
446  if (f->filter->query_formats)
447  ret = filter_query_formats(f);
448  else
449  ret = ff_default_query_formats(f);
450  if (ret < 0 && ret != AVERROR(EAGAIN))
451  return ret;
452  /* note: EAGAIN could indicate a partial success, not counted yet */
453  count_queried += ret >= 0;
454  }
455 
456  /* go through and merge as many format lists as possible */
457  for (i = 0; i < graph->nb_filters; i++) {
458  AVFilterContext *filter = graph->filters[i];
459 
460  for (j = 0; j < filter->nb_inputs; j++) {
461  AVFilterLink *link = filter->inputs[j];
462  int convert_needed = 0;
463 
464  if (!link)
465  continue;
466 
467  if (link->in_formats != link->out_formats
468  && link->in_formats && link->out_formats)
469  if (!can_merge_formats(link->in_formats, link->out_formats,
470  link->type, 0))
471  convert_needed = 1;
472  if (link->type == AVMEDIA_TYPE_AUDIO) {
473  if (link->in_samplerates != link->out_samplerates
474  && link->in_samplerates && link->out_samplerates)
476  link->out_samplerates,
477  0, 1))
478  convert_needed = 1;
479  }
480 
481 #define MERGE_DISPATCH(field, statement) \
482  if (!(link->in_ ## field && link->out_ ## field)) { \
483  count_delayed++; \
484  } else if (link->in_ ## field == link->out_ ## field) { \
485  count_already_merged++; \
486  } else if (!convert_needed) { \
487  count_merged++; \
488  statement \
489  }
490 
491  if (link->type == AVMEDIA_TYPE_AUDIO) {
494  link->out_channel_layouts))
495  convert_needed = 1;
496  )
497  MERGE_DISPATCH(samplerates,
499  link->out_samplerates))
500  convert_needed = 1;
501  )
502  }
504  if (!ff_merge_formats(link->in_formats, link->out_formats,
505  link->type))
506  convert_needed = 1;
507  )
508 #undef MERGE_DISPATCH
509 
510  if (convert_needed) {
512  AVFilter *filter;
513  AVFilterLink *inlink, *outlink;
514  char scale_args[256];
515  char inst_name[30];
516 
517  if (graph->disable_auto_convert) {
518  av_log(log_ctx, AV_LOG_ERROR,
519  "The filters '%s' and '%s' do not have a common format "
520  "and automatic conversion is disabled.\n",
521  link->src->name, link->dst->name);
522  return AVERROR(EINVAL);
523  }
524 
525  /* couldn't merge format lists. auto-insert conversion filter */
526  switch (link->type) {
527  case AVMEDIA_TYPE_VIDEO:
528  if (!(filter = avfilter_get_by_name("scale"))) {
529  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
530  "not present, cannot convert pixel formats.\n");
531  return AVERROR(EINVAL);
532  }
533 
534  snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
535  scaler_count++);
536 
537  if ((ret = avfilter_graph_create_filter(&convert, filter,
538  inst_name, graph->scale_sws_opts, NULL,
539  graph)) < 0)
540  return ret;
541  break;
542  case AVMEDIA_TYPE_AUDIO:
543  if (!(filter = avfilter_get_by_name("aresample"))) {
544  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
545  "not present, cannot convert audio formats.\n");
546  return AVERROR(EINVAL);
547  }
548 
549  snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
550  resampler_count++);
551  scale_args[0] = '\0';
552  if (graph->aresample_swr_opts)
553  snprintf(scale_args, sizeof(scale_args), "%s",
554  graph->aresample_swr_opts);
555  if ((ret = avfilter_graph_create_filter(&convert, filter,
556  inst_name, graph->aresample_swr_opts,
557  NULL, graph)) < 0)
558  return ret;
559  break;
560  default:
561  return AVERROR(EINVAL);
562  }
563 
564  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
565  return ret;
566 
567  if ((ret = filter_query_formats(convert)) < 0)
568  return ret;
569 
570  inlink = convert->inputs[0];
571  outlink = convert->outputs[0];
572  av_assert0( inlink-> in_formats->refcount > 0);
573  av_assert0( inlink->out_formats->refcount > 0);
574  av_assert0(outlink-> in_formats->refcount > 0);
575  av_assert0(outlink->out_formats->refcount > 0);
576  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
577  av_assert0( inlink-> in_samplerates->refcount > 0);
578  av_assert0( inlink->out_samplerates->refcount > 0);
579  av_assert0(outlink-> in_samplerates->refcount > 0);
580  av_assert0(outlink->out_samplerates->refcount > 0);
581  av_assert0( inlink-> in_channel_layouts->refcount > 0);
582  av_assert0( inlink->out_channel_layouts->refcount > 0);
583  av_assert0(outlink-> in_channel_layouts->refcount > 0);
584  av_assert0(outlink->out_channel_layouts->refcount > 0);
585  }
586  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
587  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
588  ret = AVERROR(ENOSYS);
589  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
591  inlink->out_samplerates) ||
593  inlink->out_channel_layouts)))
594  ret = AVERROR(ENOSYS);
595  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
597  outlink->out_samplerates) ||
599  outlink->out_channel_layouts)))
600  ret = AVERROR(ENOSYS);
601 
602  if (ret < 0) {
603  av_log(log_ctx, AV_LOG_ERROR,
604  "Impossible to convert between the formats supported by the filter "
605  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
606  return ret;
607  }
608  }
609  }
610  }
611 
612  av_log(graph, AV_LOG_DEBUG, "query_formats: "
613  "%d queried, %d merged, %d already done, %d delayed\n",
614  count_queried, count_merged, count_already_merged, count_delayed);
615  if (count_delayed) {
616  AVBPrint bp;
617 
618  /* if count_queried > 0, one filter at least did set its formats,
619  that will give additional information to its neighbour;
620  if count_merged > 0, one pair of formats lists at least was merged,
621  that will give additional information to all connected filters;
622  in both cases, progress was made and a new round must be done */
623  if (count_queried || count_merged)
624  return AVERROR(EAGAIN);
626  for (i = 0; i < graph->nb_filters; i++)
627  if (!formats_declared(graph->filters[i]))
628  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
629  graph->filters[i]->name);
630  av_log(graph, AV_LOG_ERROR,
631  "The following filters could not choose their formats: %s\n"
632  "Consider inserting the (a)format filter near their input or "
633  "output.\n", bp.str);
634  return AVERROR(EIO);
635  }
636  return 0;
637 }
638 
639 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
640 {
641  int score = 0;
642 
643  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
644  score ++;
645 
646  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
647  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
648  }else
649  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
650 
653  score += 20;
654 
657  score += 2;
658 
659  return score;
660 }
661 
663  enum AVSampleFormat src_fmt)
664 {
665  int score1, score2;
666 
667  score1 = get_fmt_score(dst_fmt1, src_fmt);
668  score2 = get_fmt_score(dst_fmt2, src_fmt);
669 
670  return score1 < score2 ? dst_fmt1 : dst_fmt2;
671 }
672 
674 {
675  if (!link || !link->in_formats)
676  return 0;
677 
678  if (link->type == AVMEDIA_TYPE_VIDEO) {
679  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
680  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
681  enum AVPixelFormat best= AV_PIX_FMT_NONE;
682  int i;
683  for (i=0; i<link->in_formats->nb_formats; i++) {
684  enum AVPixelFormat p = link->in_formats->formats[i];
685  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
686  }
687  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
689  av_get_pix_fmt_name(ref->format), has_alpha);
690  link->in_formats->formats[0] = best;
691  }
692  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
693  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
695  int i;
696  for (i=0; i<link->in_formats->nb_formats; i++) {
697  enum AVSampleFormat p = link->in_formats->formats[i];
698  best = find_best_sample_fmt_of_2(best, p, ref->format);
699  }
700  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
703  link->in_formats->formats[0] = best;
704  }
705  }
706 
707  link->in_formats->nb_formats = 1;
708  link->format = link->in_formats->formats[0];
709 
710  if (link->type == AVMEDIA_TYPE_AUDIO) {
711  if (!link->in_samplerates->nb_formats) {
712  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
713  " the link between filters %s and %s.\n", link->src->name,
714  link->dst->name);
715  return AVERROR(EINVAL);
716  }
717  link->in_samplerates->nb_formats = 1;
718  link->sample_rate = link->in_samplerates->formats[0];
719 
720  if (link->in_channel_layouts->all_layouts) {
721  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
722  " the link between filters %s and %s.\n", link->src->name,
723  link->dst->name);
724  if (!link->in_channel_layouts->all_counts)
725  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
726  "supported, try specifying a channel layout using "
727  "'aformat=channel_layouts=something'.\n");
728  return AVERROR(EINVAL);
729  }
732  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
733  link->channel_layout = 0;
734  else
736  }
737 
744 
745  return 0;
746 }
747 
748 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
749 do { \
750  for (i = 0; i < filter->nb_inputs; i++) { \
751  AVFilterLink *link = filter->inputs[i]; \
752  fmt_type fmt; \
753  \
754  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
755  continue; \
756  fmt = link->out_ ## list->var[0]; \
757  \
758  for (j = 0; j < filter->nb_outputs; j++) { \
759  AVFilterLink *out_link = filter->outputs[j]; \
760  list_type *fmts; \
761  \
762  if (link->type != out_link->type || \
763  out_link->in_ ## list->nb == 1) \
764  continue; \
765  fmts = out_link->in_ ## list; \
766  \
767  if (!out_link->in_ ## list->nb) { \
768  if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
769  return ret; \
770  ret = 1; \
771  break; \
772  } \
773  \
774  for (k = 0; k < out_link->in_ ## list->nb; k++) \
775  if (fmts->var[k] == fmt) { \
776  fmts->var[0] = fmt; \
777  fmts->nb = 1; \
778  ret = 1; \
779  break; \
780  } \
781  } \
782  } \
783 } while (0)
784 
786 {
787  int i, j, k, ret = 0;
788 
790  nb_formats, ff_add_format, ff_formats_unref);
791  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
792  nb_formats, ff_add_format, ff_formats_unref);
793 
794  /* reduce channel layouts */
795  for (i = 0; i < filter->nb_inputs; i++) {
796  AVFilterLink *inlink = filter->inputs[i];
797  uint64_t fmt;
798 
799  if (!inlink->out_channel_layouts ||
801  continue;
802  fmt = inlink->out_channel_layouts->channel_layouts[0];
803 
804  for (j = 0; j < filter->nb_outputs; j++) {
805  AVFilterLink *outlink = filter->outputs[j];
807 
808  fmts = outlink->in_channel_layouts;
809  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
810  continue;
811 
812  if (fmts->all_layouts &&
813  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
814  /* Turn the infinite list into a singleton */
815  fmts->all_layouts = fmts->all_counts = 0;
816  if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
817  ret = 1;
818  break;
819  }
820 
821  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
822  if (fmts->channel_layouts[k] == fmt) {
823  fmts->channel_layouts[0] = fmt;
824  fmts->nb_channel_layouts = 1;
825  ret = 1;
826  break;
827  }
828  }
829  }
830  }
831 
832  return ret;
833 }
834 
835 static int reduce_formats(AVFilterGraph *graph)
836 {
837  int i, reduced, ret;
838 
839  do {
840  reduced = 0;
841 
842  for (i = 0; i < graph->nb_filters; i++) {
843  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
844  return ret;
845  reduced |= ret;
846  }
847  } while (reduced);
848 
849  return 0;
850 }
851 
853 {
854  AVFilterLink *link = NULL;
855  int sample_rate;
856  int i, j;
857 
858  for (i = 0; i < filter->nb_inputs; i++) {
859  link = filter->inputs[i];
860 
861  if (link->type == AVMEDIA_TYPE_AUDIO &&
862  link->out_samplerates->nb_formats== 1)
863  break;
864  }
865  if (i == filter->nb_inputs)
866  return;
867 
868  sample_rate = link->out_samplerates->formats[0];
869 
870  for (i = 0; i < filter->nb_outputs; i++) {
871  AVFilterLink *outlink = filter->outputs[i];
872  int best_idx, best_diff = INT_MAX;
873 
874  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
875  outlink->in_samplerates->nb_formats < 2)
876  continue;
877 
878  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
879  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
880 
881  av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
882 
883  if (diff < best_diff) {
884  best_diff = diff;
885  best_idx = j;
886  }
887  }
888  FFSWAP(int, outlink->in_samplerates->formats[0],
889  outlink->in_samplerates->formats[best_idx]);
890  }
891 }
892 
893 static void swap_samplerates(AVFilterGraph *graph)
894 {
895  int i;
896 
897  for (i = 0; i < graph->nb_filters; i++)
899 }
900 
901 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
902 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
903 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
904 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
905 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
906 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
907 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
908 
909 /* allowable substitutions for channel pairs when comparing layouts,
910  * ordered by priority for both values */
911 static const uint64_t ch_subst[][2] = {
933 };
934 
936 {
937  AVFilterLink *link = NULL;
938  int i, j, k;
939 
940  for (i = 0; i < filter->nb_inputs; i++) {
941  link = filter->inputs[i];
942 
943  if (link->type == AVMEDIA_TYPE_AUDIO &&
945  break;
946  }
947  if (i == filter->nb_inputs)
948  return;
949 
950  for (i = 0; i < filter->nb_outputs; i++) {
951  AVFilterLink *outlink = filter->outputs[i];
952  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
953 
954  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
956  continue;
957 
958  for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
959  uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
960  uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
961  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
962  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
963  int count_diff = out_channels - in_channels;
964  int matched_channels, extra_channels;
965  int score = 100000;
966 
967  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
968  /* Compute score in case the input or output layout encodes
969  a channel count; in this case the score is not altered by
970  the computation afterwards, as in_chlayout and
971  out_chlayout have both been set to 0 */
972  if (FF_LAYOUT2COUNT(in_chlayout))
973  in_channels = FF_LAYOUT2COUNT(in_chlayout);
974  if (FF_LAYOUT2COUNT(out_chlayout))
975  out_channels = FF_LAYOUT2COUNT(out_chlayout);
976  score -= 10000 + FFABS(out_channels - in_channels) +
977  (in_channels > out_channels ? 10000 : 0);
978  in_chlayout = out_chlayout = 0;
979  /* Let the remaining computation run, even if the score
980  value is not altered */
981  }
982 
983  /* channel substitution */
984  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
985  uint64_t cmp0 = ch_subst[k][0];
986  uint64_t cmp1 = ch_subst[k][1];
987  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
988  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
989  in_chlayout &= ~cmp0;
990  out_chlayout &= ~cmp1;
991  /* add score for channel match, minus a deduction for
992  having to do the substitution */
993  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
994  }
995  }
996 
997  /* no penalty for LFE channel mismatch */
998  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
999  (out_chlayout & AV_CH_LOW_FREQUENCY))
1000  score += 10;
1001  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1002  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1003 
1004  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1005  out_chlayout);
1006  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1007  (~in_chlayout));
1008  score += 10 * matched_channels - 5 * extra_channels;
1009 
1010  if (score > best_score ||
1011  (count_diff < best_count_diff && score == best_score)) {
1012  best_score = score;
1013  best_idx = j;
1014  best_count_diff = count_diff;
1015  }
1016  }
1017  av_assert0(best_idx >= 0);
1018  FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1019  outlink->in_channel_layouts->channel_layouts[best_idx]);
1020  }
1021 
1022 }
1023 
1025 {
1026  int i;
1027 
1028  for (i = 0; i < graph->nb_filters; i++)
1030 }
1031 
1033 {
1034  AVFilterLink *link = NULL;
1035  int format, bps;
1036  int i, j;
1037 
1038  for (i = 0; i < filter->nb_inputs; i++) {
1039  link = filter->inputs[i];
1040 
1041  if (link->type == AVMEDIA_TYPE_AUDIO &&
1042  link->out_formats->nb_formats == 1)
1043  break;
1044  }
1045  if (i == filter->nb_inputs)
1046  return;
1047 
1048  format = link->out_formats->formats[0];
1049  bps = av_get_bytes_per_sample(format);
1050 
1051  for (i = 0; i < filter->nb_outputs; i++) {
1052  AVFilterLink *outlink = filter->outputs[i];
1053  int best_idx = -1, best_score = INT_MIN;
1054 
1055  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1056  outlink->in_formats->nb_formats < 2)
1057  continue;
1058 
1059  for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1060  int out_format = outlink->in_formats->formats[j];
1061  int out_bps = av_get_bytes_per_sample(out_format);
1062  int score;
1063 
1064  if (av_get_packed_sample_fmt(out_format) == format ||
1065  av_get_planar_sample_fmt(out_format) == format) {
1066  best_idx = j;
1067  break;
1068  }
1069 
1070  /* for s32 and float prefer double to prevent loss of information */
1071  if (bps == 4 && out_bps == 8) {
1072  best_idx = j;
1073  break;
1074  }
1075 
1076  /* prefer closest higher or equal bps */
1077  score = -abs(out_bps - bps);
1078  if (out_bps >= bps)
1079  score += INT_MAX/2;
1080 
1081  if (score > best_score) {
1082  best_score = score;
1083  best_idx = j;
1084  }
1085  }
1086  av_assert0(best_idx >= 0);
1087  FFSWAP(int, outlink->in_formats->formats[0],
1088  outlink->in_formats->formats[best_idx]);
1089  }
1090 }
1091 
1092 static void swap_sample_fmts(AVFilterGraph *graph)
1093 {
1094  int i;
1095 
1096  for (i = 0; i < graph->nb_filters; i++)
1098 
1099 }
1100 
1101 static int pick_formats(AVFilterGraph *graph)
1102 {
1103  int i, j, ret;
1104  int change;
1105 
1106  do{
1107  change = 0;
1108  for (i = 0; i < graph->nb_filters; i++) {
1109  AVFilterContext *filter = graph->filters[i];
1110  if (filter->nb_inputs){
1111  for (j = 0; j < filter->nb_inputs; j++){
1112  if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1113  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1114  return ret;
1115  change = 1;
1116  }
1117  }
1118  }
1119  if (filter->nb_outputs){
1120  for (j = 0; j < filter->nb_outputs; j++){
1121  if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1122  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1123  return ret;
1124  change = 1;
1125  }
1126  }
1127  }
1128  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1129  for (j = 0; j < filter->nb_outputs; j++) {
1130  if(filter->outputs[j]->format<0) {
1131  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1132  return ret;
1133  change = 1;
1134  }
1135  }
1136  }
1137  }
1138  }while(change);
1139 
1140  for (i = 0; i < graph->nb_filters; i++) {
1141  AVFilterContext *filter = graph->filters[i];
1142 
1143  for (j = 0; j < filter->nb_inputs; j++)
1144  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1145  return ret;
1146  for (j = 0; j < filter->nb_outputs; j++)
1147  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1148  return ret;
1149  }
1150  return 0;
1151 }
1152 
1153 /**
1154  * Configure the formats of all the links in the graph.
1155  */
1156 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1157 {
1158  int ret;
1159 
1160  /* find supported formats from sub-filters, and merge along links */
1161  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1162  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1163  if (ret < 0)
1164  return ret;
1165 
1166  /* Once everything is merged, it's possible that we'll still have
1167  * multiple valid media format choices. We try to minimize the amount
1168  * of format conversion inside filters */
1169  if ((ret = reduce_formats(graph)) < 0)
1170  return ret;
1171 
1172  /* for audio filters, ensure the best format, sample rate and channel layout
1173  * is selected */
1174  swap_sample_fmts(graph);
1175  swap_samplerates(graph);
1176  swap_channel_layouts(graph);
1177 
1178  if ((ret = pick_formats(graph)) < 0)
1179  return ret;
1180 
1181  return 0;
1182 }
1183 
1185  AVClass *log_ctx)
1186 {
1187  unsigned i, j;
1188  int sink_links_count = 0, n = 0;
1189  AVFilterContext *f;
1190  AVFilterLink **sinks;
1191 
1192  for (i = 0; i < graph->nb_filters; i++) {
1193  f = graph->filters[i];
1194  for (j = 0; j < f->nb_inputs; j++) {
1195  f->inputs[j]->graph = graph;
1196  f->inputs[j]->age_index = -1;
1197  }
1198  for (j = 0; j < f->nb_outputs; j++) {
1199  f->outputs[j]->graph = graph;
1200  f->outputs[j]->age_index= -1;
1201  }
1202  if (!f->nb_outputs) {
1203  if (f->nb_inputs > INT_MAX - sink_links_count)
1204  return AVERROR(EINVAL);
1205  sink_links_count += f->nb_inputs;
1206  }
1207  }
1208  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1209  if (!sinks)
1210  return AVERROR(ENOMEM);
1211  for (i = 0; i < graph->nb_filters; i++) {
1212  f = graph->filters[i];
1213  if (!f->nb_outputs) {
1214  for (j = 0; j < f->nb_inputs; j++) {
1215  sinks[n] = f->inputs[j];
1216  f->inputs[j]->age_index = n++;
1217  }
1218  }
1219  }
1220  av_assert0(n == sink_links_count);
1221  graph->sink_links = sinks;
1222  graph->sink_links_count = sink_links_count;
1223  return 0;
1224 }
1225 
1226 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1227 {
1228  AVFilterContext *f;
1229  int i, j, ret;
1230  int fifo_count = 0;
1231 
1232  for (i = 0; i < graph->nb_filters; i++) {
1233  f = graph->filters[i];
1234 
1235  for (j = 0; j < f->nb_inputs; j++) {
1236  AVFilterLink *link = f->inputs[j];
1237  AVFilterContext *fifo_ctx;
1238  AVFilter *fifo;
1239  char name[32];
1240 
1241  if (!link->dstpad->needs_fifo)
1242  continue;
1243 
1244  fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1245  avfilter_get_by_name("fifo") :
1246  avfilter_get_by_name("afifo");
1247 
1248  snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1249 
1250  ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1251  NULL, graph);
1252  if (ret < 0)
1253  return ret;
1254 
1255  ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1256  if (ret < 0)
1257  return ret;
1258  }
1259  }
1260 
1261  return 0;
1262 }
1263 
1264 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1265 {
1266  int ret;
1267 
1268  if ((ret = graph_check_validity(graphctx, log_ctx)))
1269  return ret;
1270  if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1271  return ret;
1272  if ((ret = graph_config_formats(graphctx, log_ctx)))
1273  return ret;
1274  if ((ret = graph_config_links(graphctx, log_ctx)))
1275  return ret;
1276  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1277  return ret;
1278 
1279  return 0;
1280 }
1281 
1282 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1283 {
1284  int i, r = AVERROR(ENOSYS);
1285 
1286  if (!graph)
1287  return r;
1288 
1289  if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1290  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1291  if (r != AVERROR(ENOSYS))
1292  return r;
1293  }
1294 
1295  if (res_len && res)
1296  res[0] = 0;
1297 
1298  for (i = 0; i < graph->nb_filters; i++) {
1299  AVFilterContext *filter = graph->filters[i];
1300  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1301  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1302  if (r != AVERROR(ENOSYS)) {
1303  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1304  return r;
1305  }
1306  }
1307  }
1308 
1309  return r;
1310 }
1311 
1312 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1313 {
1314  int i;
1315 
1316  if(!graph)
1317  return 0;
1318 
1319  for (i = 0; i < graph->nb_filters; i++) {
1320  AVFilterContext *filter = graph->filters[i];
1321  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1322  AVFilterCommand **queue = &filter->command_queue, *next;
1323  while (*queue && (*queue)->time <= ts)
1324  queue = &(*queue)->next;
1325  next = *queue;
1326  *queue = av_mallocz(sizeof(AVFilterCommand));
1327  if (!*queue)
1328  return AVERROR(ENOMEM);
1329 
1330  (*queue)->command = av_strdup(command);
1331  (*queue)->arg = av_strdup(arg);
1332  (*queue)->time = ts;
1333  (*queue)->flags = flags;
1334  (*queue)->next = next;
1335  if(flags & AVFILTER_CMD_FLAG_ONE)
1336  return 0;
1337  }
1338  }
1339 
1340  return 0;
1341 }
1342 
1343 static void heap_bubble_up(AVFilterGraph *graph,
1344  AVFilterLink *link, int index)
1345 {
1346  AVFilterLink **links = graph->sink_links;
1347 
1348  av_assert0(index >= 0);
1349 
1350  while (index) {
1351  int parent = (index - 1) >> 1;
1352  if (links[parent]->current_pts_us >= link->current_pts_us)
1353  break;
1354  links[index] = links[parent];
1355  links[index]->age_index = index;
1356  index = parent;
1357  }
1358  links[index] = link;
1359  link->age_index = index;
1360 }
1361 
1362 static void heap_bubble_down(AVFilterGraph *graph,
1363  AVFilterLink *link, int index)
1364 {
1365  AVFilterLink **links = graph->sink_links;
1366 
1367  av_assert0(index >= 0);
1368 
1369  while (1) {
1370  int child = 2 * index + 1;
1371  if (child >= graph->sink_links_count)
1372  break;
1373  if (child + 1 < graph->sink_links_count &&
1374  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1375  child++;
1376  if (link->current_pts_us < links[child]->current_pts_us)
1377  break;
1378  links[index] = links[child];
1379  links[index]->age_index = index;
1380  index = child;
1381  }
1382  links[index] = link;
1383  link->age_index = index;
1384 }
1385 
1387 {
1388  heap_bubble_up (graph, link, link->age_index);
1389  heap_bubble_down(graph, link, link->age_index);
1390 }
1391 
1393 {
1394  AVFilterLink *oldest = graph->sink_links[0];
1395  int64_t frame_count;
1396  int r;
1397 
1398  while (graph->sink_links_count) {
1399  oldest = graph->sink_links[0];
1400  if (oldest->dst->filter->activate) {
1401  /* For now, buffersink is the only filter implementing activate. */
1402  r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1404  if (r != AVERROR_EOF)
1405  return r;
1406  } else {
1407  r = ff_request_frame(oldest);
1408  }
1409  if (r != AVERROR_EOF)
1410  break;
1411  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1412  oldest->dst ? oldest->dst->name : "unknown",
1413  oldest->dstpad ? oldest->dstpad->name : "unknown");
1414  /* EOF: remove the link from the heap */
1415  if (oldest->age_index < --graph->sink_links_count)
1416  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1417  oldest->age_index);
1418  oldest->age_index = -1;
1419  }
1420  if (!graph->sink_links_count)
1421  return AVERROR_EOF;
1422  av_assert1(!oldest->dst->filter->activate);
1423  av_assert1(oldest->age_index >= 0);
1424  frame_count = oldest->frame_count_out;
1425  while (frame_count == oldest->frame_count_out) {
1426  r = ff_filter_graph_run_once(graph);
1427  if (r == AVERROR(EAGAIN) &&
1428  !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1429  !oldest->status_in)
1430  ff_request_frame(oldest);
1431  else if (r < 0)
1432  return r;
1433  }
1434  return 0;
1435 }
1436 
1438 {
1440  unsigned i;
1441 
1442  av_assert0(graph->nb_filters);
1443  filter = graph->filters[0];
1444  for (i = 1; i < graph->nb_filters; i++)
1445  if (graph->filters[i]->ready > filter->ready)
1446  filter = graph->filters[i];
1447  if (!filter->ready)
1448  return AVERROR(EAGAIN);
1449  return ff_filter_activate(filter);
1450 }
AVFilterContext ** filters
Definition: avfilter.h:842
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:907
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:692
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2333
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:862
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:135
static void swap_sample_fmts(AVFilterGraph *graph)
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:789
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:86
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:1028
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:1291
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:113
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:222
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:845
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:230
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:318
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:340
#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:331
char * name
name of this filter instance
Definition: avfilter.h:328
#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:895
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:334
unsigned ready
Ready status of the filter.
Definition: avfilter.h:393
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:869
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:330
#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:841
unsigned nb_outputs
number of output pads
Definition: avfilter.h:336
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:269
AVFilterLink ** sink_links
Private fields.
Definition: avfilter.h:906
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:95
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:564
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:332
#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:656
#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:960
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:237
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:874
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:863
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:537
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:657
#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:843
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:335
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:365
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:1457
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:2615
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:897
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:134
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:323
#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:405
formats
Definition: signature.h:48
#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:2249
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:1468
int(* activate)(AVFilterContext *ctx)
Filter activation function.
Definition: avfilter.h:312
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:326
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
unsigned disable_auto_convert
Definition: avfilter.h:909
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