FFmpeg  4.3
avfiltergraph.c
Go to the documentation of this file.
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/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 
36 #define FF_INTERNAL_FIELDS 1
37 #include "framequeue.h"
38 
39 #include "avfilter.h"
40 #include "buffersink.h"
41 #include "formats.h"
42 #include "internal.h"
43 #include "thread.h"
44 
45 #define OFFSET(x) offsetof(AVFilterGraph, x)
46 #define F AV_OPT_FLAG_FILTERING_PARAM
47 #define V AV_OPT_FLAG_VIDEO_PARAM
48 #define A AV_OPT_FLAG_AUDIO_PARAM
49 static const AVOption filtergraph_options[] = {
50  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
51  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, F|V|A, "thread_type" },
52  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = F|V|A, .unit = "thread_type" },
53  { "threads", "Maximum number of threads", OFFSET(nb_threads),
54  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, F|V|A },
55  {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
56  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|V },
57  {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
58  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|A },
59  { NULL },
60 };
61 
62 static const AVClass filtergraph_class = {
63  .class_name = "AVFilterGraph",
64  .item_name = av_default_item_name,
65  .version = LIBAVUTIL_VERSION_INT,
66  .option = filtergraph_options,
67  .category = AV_CLASS_CATEGORY_FILTER,
68 };
69 
70 #if !HAVE_THREADS
72 {
73 }
74 
76 {
77  graph->thread_type = 0;
78  graph->nb_threads = 1;
79  return 0;
80 }
81 #endif
82 
84 {
85  AVFilterGraph *ret = av_mallocz(sizeof(*ret));
86  if (!ret)
87  return NULL;
88 
89  ret->internal = av_mallocz(sizeof(*ret->internal));
90  if (!ret->internal) {
91  av_freep(&ret);
92  return NULL;
93  }
94 
98 
99  return ret;
100 }
101 
103 {
104  int i, j;
105  for (i = 0; i < graph->nb_filters; i++) {
106  if (graph->filters[i] == filter) {
107  FFSWAP(AVFilterContext*, graph->filters[i],
108  graph->filters[graph->nb_filters - 1]);
109  graph->nb_filters--;
110  filter->graph = NULL;
111  for (j = 0; j<filter->nb_outputs; j++)
112  if (filter->outputs[j])
113  filter->outputs[j]->graph = NULL;
114 
115  return;
116  }
117  }
118 }
119 
121 {
122  if (!*graph)
123  return;
124 
125  while ((*graph)->nb_filters)
126  avfilter_free((*graph)->filters[0]);
127 
128  ff_graph_thread_free(*graph);
129 
130  av_freep(&(*graph)->sink_links);
131 
132  av_freep(&(*graph)->scale_sws_opts);
133  av_freep(&(*graph)->aresample_swr_opts);
134 #if FF_API_LAVR_OPTS
135  av_freep(&(*graph)->resample_lavr_opts);
136 #endif
137  av_freep(&(*graph)->filters);
138  av_freep(&(*graph)->internal);
139  av_freep(graph);
140 }
141 
143  const char *name, const char *args, void *opaque,
144  AVFilterGraph *graph_ctx)
145 {
146  int ret;
147 
148  *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
149  if (!*filt_ctx)
150  return AVERROR(ENOMEM);
151 
152  ret = avfilter_init_str(*filt_ctx, args);
153  if (ret < 0)
154  goto fail;
155 
156  return 0;
157 
158 fail:
159  if (*filt_ctx)
160  avfilter_free(*filt_ctx);
161  *filt_ctx = NULL;
162  return ret;
163 }
164 
166 {
167  graph->disable_auto_convert = flags;
168 }
169 
171  const AVFilter *filter,
172  const char *name)
173 {
175 
176  if (graph->thread_type && !graph->internal->thread_execute) {
177  if (graph->execute) {
178  graph->internal->thread_execute = graph->execute;
179  } else {
180  int ret = ff_graph_thread_init(graph);
181  if (ret < 0) {
182  av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret));
183  return NULL;
184  }
185  }
186  }
187 
188  s = ff_filter_alloc(filter, name);
189  if (!s)
190  return NULL;
191 
192  filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
193  if (!filters) {
194  avfilter_free(s);
195  return NULL;
196  }
197 
198  graph->filters = filters;
199  graph->filters[graph->nb_filters++] = s;
200 
201  s->graph = graph;
202 
203  return s;
204 }
205 
206 /**
207  * Check for the validity of graph.
208  *
209  * A graph is considered valid if all its input and output pads are
210  * connected.
211  *
212  * @return >= 0 in case of success, a negative value otherwise
213  */
214 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
215 {
217  int i, j;
218 
219  for (i = 0; i < graph->nb_filters; i++) {
220  const AVFilterPad *pad;
221  filt = graph->filters[i];
222 
223  for (j = 0; j < filt->nb_inputs; j++) {
224  if (!filt->inputs[j] || !filt->inputs[j]->src) {
225  pad = &filt->input_pads[j];
226  av_log(log_ctx, AV_LOG_ERROR,
227  "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
228  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
229  return AVERROR(EINVAL);
230  }
231  }
232 
233  for (j = 0; j < filt->nb_outputs; j++) {
234  if (!filt->outputs[j] || !filt->outputs[j]->dst) {
235  pad = &filt->output_pads[j];
236  av_log(log_ctx, AV_LOG_ERROR,
237  "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
238  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
239  return AVERROR(EINVAL);
240  }
241  }
242  }
243 
244  return 0;
245 }
246 
247 /**
248  * Configure all the links of graphctx.
249  *
250  * @return >= 0 in case of success, a negative value otherwise
251  */
252 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
253 {
255  int i, ret;
256 
257  for (i = 0; i < graph->nb_filters; i++) {
258  filt = graph->filters[i];
259 
260  if (!filt->nb_outputs) {
261  if ((ret = avfilter_config_links(filt)))
262  return ret;
263  }
264  }
265 
266  return 0;
267 }
268 
269 static int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
270 {
272  AVFilterLink *l;
273  unsigned i, j;
274  int ret;
275 
276  for (i = 0; i < graph->nb_filters; i++) {
277  f = graph->filters[i];
278  for (j = 0; j < f->nb_outputs; j++) {
279  l = f->outputs[j];
280  if (l->type == AVMEDIA_TYPE_VIDEO) {
281  ret = av_image_check_size2(l->w, l->h, INT64_MAX, l->format, 0, f);
282  if (ret < 0)
283  return ret;
284  }
285  }
286  }
287  return 0;
288 }
289 
291 {
292  int i;
293 
294  for (i = 0; i < graph->nb_filters; i++)
295  if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
296  return graph->filters[i];
297 
298  return NULL;
299 }
300 
302 {
303  if (!l)
304  return;
305  if (l->nb_channel_layouts) {
306  if (l->all_layouts || l->all_counts)
307  av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
308  l->all_layouts = l->all_counts = 0;
309  } else {
310  if (l->all_counts && !l->all_layouts)
311  av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
312  l->all_layouts = 1;
313  }
314 }
315 
317 {
318  int ret, i;
320  AVFilterChannelLayouts *chlayouts;
321  AVFilterFormats *samplerates;
322  enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
323  ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
325 
326  if ((ret = ctx->filter->query_formats(ctx)) < 0) {
327  if (ret != AVERROR(EAGAIN))
328  av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
329  ctx->name, av_err2str(ret));
330  return ret;
331  }
332 
333  for (i = 0; i < ctx->nb_inputs; i++)
335  for (i = 0; i < ctx->nb_outputs; i++)
337 
338  formats = ff_all_formats(type);
339  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
340  return ret;
341  if (type == AVMEDIA_TYPE_AUDIO) {
342  samplerates = ff_all_samplerates();
343  if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
344  return ret;
345  chlayouts = ff_all_channel_layouts();
346  if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
347  return ret;
348  }
349  return 0;
350 }
351 
353 {
354  int i;
355 
356  for (i = 0; i < f->nb_inputs; i++) {
357  if (!f->inputs[i]->out_formats)
358  return 0;
359  if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
360  !(f->inputs[i]->out_samplerates &&
361  f->inputs[i]->out_channel_layouts))
362  return 0;
363  }
364  for (i = 0; i < f->nb_outputs; i++) {
365  if (!f->outputs[i]->in_formats)
366  return 0;
367  if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
368  !(f->outputs[i]->in_samplerates &&
369  f->outputs[i]->in_channel_layouts))
370  return 0;
371  }
372  return 1;
373 }
374 
376 {
377  AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
378  if (a) {
379  a->refcount = 0;
380  a->refs = NULL;
381  a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
382  if (!a->formats && arg->formats)
383  av_freep(&a);
384  }
385  return a;
386 }
387 
389  AVFilterFormats *b_arg,
390  enum AVMediaType type,
391  int is_sample_rate)
392 {
393  AVFilterFormats *a, *b, *ret;
394  if (a_arg == b_arg)
395  return 1;
396  a = clone_filter_formats(a_arg);
397  b = clone_filter_formats(b_arg);
398 
399  if (!a || !b) {
400  if (a)
401  av_freep(&a->formats);
402  if (b)
403  av_freep(&b->formats);
404 
405  av_freep(&a);
406  av_freep(&b);
407 
408  return 0;
409  }
410 
411  if (is_sample_rate) {
412  ret = ff_merge_samplerates(a, b);
413  } else {
414  ret = ff_merge_formats(a, b, type);
415  }
416  if (ret) {
417  av_freep(&ret->formats);
418  av_freep(&ret->refs);
419  av_freep(&ret);
420  return 1;
421  } else {
422  if (a)
423  av_freep(&a->formats);
424  if (b)
425  av_freep(&b->formats);
426  av_freep(&a);
427  av_freep(&b);
428  return 0;
429  }
430 }
431 
432 /**
433  * Perform one round of query_formats() and merging formats lists on the
434  * filter graph.
435  * @return >=0 if all links formats lists could be queried and merged;
436  * AVERROR(EAGAIN) some progress was made in the queries or merging
437  * and a later call may succeed;
438  * AVERROR(EIO) (may be changed) plus a log message if no progress
439  * was made and the negotiation is stuck;
440  * a negative error code if some other error happened
441  */
442 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
443 {
444  int i, j, ret;
445  int scaler_count = 0, resampler_count = 0;
446  int count_queried = 0; /* successful calls to query_formats() */
447  int count_merged = 0; /* successful merge of formats lists */
448  int count_already_merged = 0; /* lists already merged */
449  int count_delayed = 0; /* lists that need to be merged later */
450 
451  for (i = 0; i < graph->nb_filters; i++) {
452  AVFilterContext *f = graph->filters[i];
453  if (formats_declared(f))
454  continue;
455  if (f->filter->query_formats)
456  ret = filter_query_formats(f);
457  else
458  ret = ff_default_query_formats(f);
459  if (ret < 0 && ret != AVERROR(EAGAIN))
460  return ret;
461  /* note: EAGAIN could indicate a partial success, not counted yet */
462  count_queried += ret >= 0;
463  }
464 
465  /* go through and merge as many format lists as possible */
466  for (i = 0; i < graph->nb_filters; i++) {
467  AVFilterContext *filter = graph->filters[i];
468 
469  for (j = 0; j < filter->nb_inputs; j++) {
470  AVFilterLink *link = filter->inputs[j];
471  int convert_needed = 0;
472 
473  if (!link)
474  continue;
475 
476  if (link->in_formats != link->out_formats
477  && link->in_formats && link->out_formats)
478  if (!can_merge_formats(link->in_formats, link->out_formats,
479  link->type, 0))
480  convert_needed = 1;
481  if (link->type == AVMEDIA_TYPE_AUDIO) {
482  if (link->in_samplerates != link->out_samplerates
483  && link->in_samplerates && link->out_samplerates)
485  link->out_samplerates,
486  0, 1))
487  convert_needed = 1;
488  }
489 
490 #define MERGE_DISPATCH(field, statement) \
491  if (!(link->in_ ## field && link->out_ ## field)) { \
492  count_delayed++; \
493  } else if (link->in_ ## field == link->out_ ## field) { \
494  count_already_merged++; \
495  } else if (!convert_needed) { \
496  count_merged++; \
497  statement \
498  }
499 
500  if (link->type == AVMEDIA_TYPE_AUDIO) {
503  link->out_channel_layouts))
504  convert_needed = 1;
505  )
506  MERGE_DISPATCH(samplerates,
508  link->out_samplerates))
509  convert_needed = 1;
510  )
511  }
513  if (!ff_merge_formats(link->in_formats, link->out_formats,
514  link->type))
515  convert_needed = 1;
516  )
517 #undef MERGE_DISPATCH
518 
519  if (convert_needed) {
521  const AVFilter *filter;
522  AVFilterLink *inlink, *outlink;
523  char inst_name[30];
524 
525  if (graph->disable_auto_convert) {
526  av_log(log_ctx, AV_LOG_ERROR,
527  "The filters '%s' and '%s' do not have a common format "
528  "and automatic conversion is disabled.\n",
529  link->src->name, link->dst->name);
530  return AVERROR(EINVAL);
531  }
532 
533  /* couldn't merge format lists. auto-insert conversion filter */
534  switch (link->type) {
535  case AVMEDIA_TYPE_VIDEO:
536  if (!(filter = avfilter_get_by_name("scale"))) {
537  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
538  "not present, cannot convert pixel formats.\n");
539  return AVERROR(EINVAL);
540  }
541 
542  snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
543  scaler_count++);
544 
545  if ((ret = avfilter_graph_create_filter(&convert, filter,
546  inst_name, graph->scale_sws_opts, NULL,
547  graph)) < 0)
548  return ret;
549  break;
550  case AVMEDIA_TYPE_AUDIO:
551  if (!(filter = avfilter_get_by_name("aresample"))) {
552  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
553  "not present, cannot convert audio formats.\n");
554  return AVERROR(EINVAL);
555  }
556 
557  snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
558  resampler_count++);
559  if ((ret = avfilter_graph_create_filter(&convert, filter,
560  inst_name, graph->aresample_swr_opts,
561  NULL, graph)) < 0)
562  return ret;
563  break;
564  default:
565  return AVERROR(EINVAL);
566  }
567 
568  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
569  return ret;
570 
571  if ((ret = filter_query_formats(convert)) < 0)
572  return ret;
573 
574  inlink = convert->inputs[0];
575  outlink = convert->outputs[0];
576  av_assert0( inlink-> in_formats->refcount > 0);
577  av_assert0( inlink->out_formats->refcount > 0);
578  av_assert0(outlink-> in_formats->refcount > 0);
579  av_assert0(outlink->out_formats->refcount > 0);
580  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
581  av_assert0( inlink-> in_samplerates->refcount > 0);
582  av_assert0( inlink->out_samplerates->refcount > 0);
583  av_assert0(outlink-> in_samplerates->refcount > 0);
584  av_assert0(outlink->out_samplerates->refcount > 0);
585  av_assert0( inlink-> in_channel_layouts->refcount > 0);
586  av_assert0( inlink->out_channel_layouts->refcount > 0);
587  av_assert0(outlink-> in_channel_layouts->refcount > 0);
588  av_assert0(outlink->out_channel_layouts->refcount > 0);
589  }
590  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
591  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
592  ret = AVERROR(ENOSYS);
593  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
595  inlink->out_samplerates) ||
597  inlink->out_channel_layouts)))
598  ret = AVERROR(ENOSYS);
599  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
601  outlink->out_samplerates) ||
603  outlink->out_channel_layouts)))
604  ret = AVERROR(ENOSYS);
605 
606  if (ret < 0) {
607  av_log(log_ctx, AV_LOG_ERROR,
608  "Impossible to convert between the formats supported by the filter "
609  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
610  return ret;
611  }
612  }
613  }
614  }
615 
616  av_log(graph, AV_LOG_DEBUG, "query_formats: "
617  "%d queried, %d merged, %d already done, %d delayed\n",
618  count_queried, count_merged, count_already_merged, count_delayed);
619  if (count_delayed) {
620  AVBPrint bp;
621 
622  /* if count_queried > 0, one filter at least did set its formats,
623  that will give additional information to its neighbour;
624  if count_merged > 0, one pair of formats lists at least was merged,
625  that will give additional information to all connected filters;
626  in both cases, progress was made and a new round must be done */
627  if (count_queried || count_merged)
628  return AVERROR(EAGAIN);
630  for (i = 0; i < graph->nb_filters; i++)
631  if (!formats_declared(graph->filters[i]))
632  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
633  graph->filters[i]->name);
634  av_log(graph, AV_LOG_ERROR,
635  "The following filters could not choose their formats: %s\n"
636  "Consider inserting the (a)format filter near their input or "
637  "output.\n", bp.str);
638  return AVERROR(EIO);
639  }
640  return 0;
641 }
642 
643 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
644 {
645  int score = 0;
646 
647  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
648  score ++;
649 
650  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
651  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
652  }else
653  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
654 
657  score += 20;
658 
661  score += 2;
662 
663  return score;
664 }
665 
667  enum AVSampleFormat src_fmt)
668 {
669  int score1, score2;
670 
671  score1 = get_fmt_score(dst_fmt1, src_fmt);
672  score2 = get_fmt_score(dst_fmt2, src_fmt);
673 
674  return score1 < score2 ? dst_fmt1 : dst_fmt2;
675 }
676 
678 {
679  if (!link || !link->in_formats)
680  return 0;
681 
682  if (link->type == AVMEDIA_TYPE_VIDEO) {
683  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
684  //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
685  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
686  enum AVPixelFormat best= AV_PIX_FMT_NONE;
687  int i;
688  for (i=0; i<link->in_formats->nb_formats; i++) {
689  enum AVPixelFormat p = link->in_formats->formats[i];
690  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
691  }
692  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
694  av_get_pix_fmt_name(ref->format), has_alpha);
695  link->in_formats->formats[0] = best;
696  }
697  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
698  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
700  int i;
701  for (i=0; i<link->in_formats->nb_formats; i++) {
702  enum AVSampleFormat p = link->in_formats->formats[i];
703  best = find_best_sample_fmt_of_2(best, p, ref->format);
704  }
705  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
708  link->in_formats->formats[0] = best;
709  }
710  }
711 
712  link->in_formats->nb_formats = 1;
713  link->format = link->in_formats->formats[0];
714 
715  if (link->type == AVMEDIA_TYPE_AUDIO) {
716  if (!link->in_samplerates->nb_formats) {
717  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
718  " the link between filters %s and %s.\n", link->src->name,
719  link->dst->name);
720  return AVERROR(EINVAL);
721  }
722  link->in_samplerates->nb_formats = 1;
723  link->sample_rate = link->in_samplerates->formats[0];
724 
725  if (link->in_channel_layouts->all_layouts) {
726  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
727  " the link between filters %s and %s.\n", link->src->name,
728  link->dst->name);
729  if (!link->in_channel_layouts->all_counts)
730  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
731  "supported, try specifying a channel layout using "
732  "'aformat=channel_layouts=something'.\n");
733  return AVERROR(EINVAL);
734  }
737  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
738  link->channel_layout = 0;
739  else
741  }
742 
749 
750  return 0;
751 }
752 
753 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
754 do { \
755  for (i = 0; i < filter->nb_inputs; i++) { \
756  AVFilterLink *link = filter->inputs[i]; \
757  fmt_type fmt; \
758  \
759  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
760  continue; \
761  fmt = link->out_ ## list->var[0]; \
762  \
763  for (j = 0; j < filter->nb_outputs; j++) { \
764  AVFilterLink *out_link = filter->outputs[j]; \
765  list_type *fmts; \
766  \
767  if (link->type != out_link->type || \
768  out_link->in_ ## list->nb == 1) \
769  continue; \
770  fmts = out_link->in_ ## list; \
771  \
772  if (!out_link->in_ ## list->nb) { \
773  if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
774  return ret; \
775  ret = 1; \
776  break; \
777  } \
778  \
779  for (k = 0; k < out_link->in_ ## list->nb; k++) \
780  if (fmts->var[k] == fmt) { \
781  fmts->var[0] = fmt; \
782  fmts->nb = 1; \
783  ret = 1; \
784  break; \
785  } \
786  } \
787  } \
788 } while (0)
789 
791 {
792  int i, j, k, ret = 0;
793 
795  nb_formats, ff_add_format, ff_formats_unref);
796  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
797  nb_formats, ff_add_format, ff_formats_unref);
798 
799  /* reduce channel layouts */
800  for (i = 0; i < filter->nb_inputs; i++) {
801  AVFilterLink *inlink = filter->inputs[i];
802  uint64_t fmt;
803 
804  if (!inlink->out_channel_layouts ||
806  continue;
807  fmt = inlink->out_channel_layouts->channel_layouts[0];
808 
809  for (j = 0; j < filter->nb_outputs; j++) {
810  AVFilterLink *outlink = filter->outputs[j];
812 
813  fmts = outlink->in_channel_layouts;
814  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
815  continue;
816 
817  if (fmts->all_layouts &&
818  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
819  /* Turn the infinite list into a singleton */
820  fmts->all_layouts = fmts->all_counts = 0;
821  if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
822  ret = 1;
823  break;
824  }
825 
826  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
827  if (fmts->channel_layouts[k] == fmt) {
828  fmts->channel_layouts[0] = fmt;
829  fmts->nb_channel_layouts = 1;
830  ret = 1;
831  break;
832  }
833  }
834  }
835  }
836 
837  return ret;
838 }
839 
840 static int reduce_formats(AVFilterGraph *graph)
841 {
842  int i, reduced, ret;
843 
844  do {
845  reduced = 0;
846 
847  for (i = 0; i < graph->nb_filters; i++) {
848  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
849  return ret;
850  reduced |= ret;
851  }
852  } while (reduced);
853 
854  return 0;
855 }
856 
858 {
859  AVFilterLink *link = NULL;
860  int sample_rate;
861  int i, j;
862 
863  for (i = 0; i < filter->nb_inputs; i++) {
864  link = filter->inputs[i];
865 
866  if (link->type == AVMEDIA_TYPE_AUDIO &&
867  link->out_samplerates->nb_formats== 1)
868  break;
869  }
870  if (i == filter->nb_inputs)
871  return;
872 
873  sample_rate = link->out_samplerates->formats[0];
874 
875  for (i = 0; i < filter->nb_outputs; i++) {
876  AVFilterLink *outlink = filter->outputs[i];
877  int best_idx, best_diff = INT_MAX;
878 
879  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
880  outlink->in_samplerates->nb_formats < 2)
881  continue;
882 
883  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
884  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
885 
886  av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
887 
888  if (diff < best_diff) {
889  best_diff = diff;
890  best_idx = j;
891  }
892  }
893  FFSWAP(int, outlink->in_samplerates->formats[0],
894  outlink->in_samplerates->formats[best_idx]);
895  }
896 }
897 
898 static void swap_samplerates(AVFilterGraph *graph)
899 {
900  int i;
901 
902  for (i = 0; i < graph->nb_filters; i++)
904 }
905 
906 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
907 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
908 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
909 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
910 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
911 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
912 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
913 
914 /* allowable substitutions for channel pairs when comparing layouts,
915  * ordered by priority for both values */
916 static const uint64_t ch_subst[][2] = {
921  { CH_CENTER_PAIR, CH_WIDE_PAIR },
922  { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
923  { CH_WIDE_PAIR, CH_FRONT_PAIR },
924  { CH_WIDE_PAIR, CH_CENTER_PAIR },
925  { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
926  { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
927  { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
928  { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
932  { CH_BACK_PAIR, CH_DIRECT_PAIR },
934  { CH_BACK_PAIR, AV_CH_BACK_CENTER },
935  { AV_CH_BACK_CENTER, CH_BACK_PAIR },
936  { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
937  { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
938 };
939 
941 {
942  AVFilterLink *link = NULL;
943  int i, j, k;
944 
945  for (i = 0; i < filter->nb_inputs; i++) {
946  link = filter->inputs[i];
947 
948  if (link->type == AVMEDIA_TYPE_AUDIO &&
950  break;
951  }
952  if (i == filter->nb_inputs)
953  return;
954 
955  for (i = 0; i < filter->nb_outputs; i++) {
956  AVFilterLink *outlink = filter->outputs[i];
957  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
958 
959  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
961  continue;
962 
963  for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
964  uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
965  uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
966  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
967  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
968  int count_diff = out_channels - in_channels;
969  int matched_channels, extra_channels;
970  int score = 100000;
971 
972  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
973  /* Compute score in case the input or output layout encodes
974  a channel count; in this case the score is not altered by
975  the computation afterwards, as in_chlayout and
976  out_chlayout have both been set to 0 */
977  if (FF_LAYOUT2COUNT(in_chlayout))
978  in_channels = FF_LAYOUT2COUNT(in_chlayout);
979  if (FF_LAYOUT2COUNT(out_chlayout))
980  out_channels = FF_LAYOUT2COUNT(out_chlayout);
981  score -= 10000 + FFABS(out_channels - in_channels) +
982  (in_channels > out_channels ? 10000 : 0);
983  in_chlayout = out_chlayout = 0;
984  /* Let the remaining computation run, even if the score
985  value is not altered */
986  }
987 
988  /* channel substitution */
989  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
990  uint64_t cmp0 = ch_subst[k][0];
991  uint64_t cmp1 = ch_subst[k][1];
992  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
993  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
994  in_chlayout &= ~cmp0;
995  out_chlayout &= ~cmp1;
996  /* add score for channel match, minus a deduction for
997  having to do the substitution */
998  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
999  }
1000  }
1001 
1002  /* no penalty for LFE channel mismatch */
1003  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
1004  (out_chlayout & AV_CH_LOW_FREQUENCY))
1005  score += 10;
1006  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1007  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1008 
1009  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1010  out_chlayout);
1011  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1012  (~in_chlayout));
1013  score += 10 * matched_channels - 5 * extra_channels;
1014 
1015  if (score > best_score ||
1016  (count_diff < best_count_diff && score == best_score)) {
1017  best_score = score;
1018  best_idx = j;
1019  best_count_diff = count_diff;
1020  }
1021  }
1022  av_assert0(best_idx >= 0);
1023  FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1024  outlink->in_channel_layouts->channel_layouts[best_idx]);
1025  }
1026 
1027 }
1028 
1030 {
1031  int i;
1032 
1033  for (i = 0; i < graph->nb_filters; i++)
1035 }
1036 
1038 {
1039  AVFilterLink *link = NULL;
1040  int format, bps;
1041  int i, j;
1042 
1043  for (i = 0; i < filter->nb_inputs; i++) {
1044  link = filter->inputs[i];
1045 
1046  if (link->type == AVMEDIA_TYPE_AUDIO &&
1047  link->out_formats->nb_formats == 1)
1048  break;
1049  }
1050  if (i == filter->nb_inputs)
1051  return;
1052 
1053  format = link->out_formats->formats[0];
1054  bps = av_get_bytes_per_sample(format);
1055 
1056  for (i = 0; i < filter->nb_outputs; i++) {
1057  AVFilterLink *outlink = filter->outputs[i];
1058  int best_idx = -1, best_score = INT_MIN;
1059 
1060  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1061  outlink->in_formats->nb_formats < 2)
1062  continue;
1063 
1064  for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1065  int out_format = outlink->in_formats->formats[j];
1066  int out_bps = av_get_bytes_per_sample(out_format);
1067  int score;
1068 
1069  if (av_get_packed_sample_fmt(out_format) == format ||
1070  av_get_planar_sample_fmt(out_format) == format) {
1071  best_idx = j;
1072  break;
1073  }
1074 
1075  /* for s32 and float prefer double to prevent loss of information */
1076  if (bps == 4 && out_bps == 8) {
1077  best_idx = j;
1078  break;
1079  }
1080 
1081  /* prefer closest higher or equal bps */
1082  score = -abs(out_bps - bps);
1083  if (out_bps >= bps)
1084  score += INT_MAX/2;
1085 
1086  if (score > best_score) {
1087  best_score = score;
1088  best_idx = j;
1089  }
1090  }
1091  av_assert0(best_idx >= 0);
1092  FFSWAP(int, outlink->in_formats->formats[0],
1093  outlink->in_formats->formats[best_idx]);
1094  }
1095 }
1096 
1097 static void swap_sample_fmts(AVFilterGraph *graph)
1098 {
1099  int i;
1100 
1101  for (i = 0; i < graph->nb_filters; i++)
1103 
1104 }
1105 
1106 static int pick_formats(AVFilterGraph *graph)
1107 {
1108  int i, j, ret;
1109  int change;
1110 
1111  do{
1112  change = 0;
1113  for (i = 0; i < graph->nb_filters; i++) {
1114  AVFilterContext *filter = graph->filters[i];
1115  if (filter->nb_inputs){
1116  for (j = 0; j < filter->nb_inputs; j++){
1117  if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1118  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1119  return ret;
1120  change = 1;
1121  }
1122  }
1123  }
1124  if (filter->nb_outputs){
1125  for (j = 0; j < filter->nb_outputs; j++){
1126  if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1127  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1128  return ret;
1129  change = 1;
1130  }
1131  }
1132  }
1133  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1134  for (j = 0; j < filter->nb_outputs; j++) {
1135  if(filter->outputs[j]->format<0) {
1136  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1137  return ret;
1138  change = 1;
1139  }
1140  }
1141  }
1142  }
1143  }while(change);
1144 
1145  for (i = 0; i < graph->nb_filters; i++) {
1146  AVFilterContext *filter = graph->filters[i];
1147 
1148  for (j = 0; j < filter->nb_inputs; j++)
1149  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1150  return ret;
1151  for (j = 0; j < filter->nb_outputs; j++)
1152  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1153  return ret;
1154  }
1155  return 0;
1156 }
1157 
1158 /**
1159  * Configure the formats of all the links in the graph.
1160  */
1161 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1162 {
1163  int ret;
1164 
1165  /* find supported formats from sub-filters, and merge along links */
1166  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1167  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1168  if (ret < 0)
1169  return ret;
1170 
1171  /* Once everything is merged, it's possible that we'll still have
1172  * multiple valid media format choices. We try to minimize the amount
1173  * of format conversion inside filters */
1174  if ((ret = reduce_formats(graph)) < 0)
1175  return ret;
1176 
1177  /* for audio filters, ensure the best format, sample rate and channel layout
1178  * is selected */
1179  swap_sample_fmts(graph);
1180  swap_samplerates(graph);
1181  swap_channel_layouts(graph);
1182 
1183  if ((ret = pick_formats(graph)) < 0)
1184  return ret;
1185 
1186  return 0;
1187 }
1188 
1190  AVClass *log_ctx)
1191 {
1192  unsigned i, j;
1193  int sink_links_count = 0, n = 0;
1194  AVFilterContext *f;
1195  AVFilterLink **sinks;
1196 
1197  for (i = 0; i < graph->nb_filters; i++) {
1198  f = graph->filters[i];
1199  for (j = 0; j < f->nb_inputs; j++) {
1200  f->inputs[j]->graph = graph;
1201  f->inputs[j]->age_index = -1;
1202  }
1203  for (j = 0; j < f->nb_outputs; j++) {
1204  f->outputs[j]->graph = graph;
1205  f->outputs[j]->age_index= -1;
1206  }
1207  if (!f->nb_outputs) {
1208  if (f->nb_inputs > INT_MAX - sink_links_count)
1209  return AVERROR(EINVAL);
1210  sink_links_count += f->nb_inputs;
1211  }
1212  }
1213  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1214  if (!sinks)
1215  return AVERROR(ENOMEM);
1216  for (i = 0; i < graph->nb_filters; i++) {
1217  f = graph->filters[i];
1218  if (!f->nb_outputs) {
1219  for (j = 0; j < f->nb_inputs; j++) {
1220  sinks[n] = f->inputs[j];
1221  f->inputs[j]->age_index = n++;
1222  }
1223  }
1224  }
1225  av_assert0(n == sink_links_count);
1226  graph->sink_links = sinks;
1227  graph->sink_links_count = sink_links_count;
1228  return 0;
1229 }
1230 
1231 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1232 {
1233  AVFilterContext *f;
1234  int i, j, ret;
1235  int fifo_count = 0;
1236 
1237  for (i = 0; i < graph->nb_filters; i++) {
1238  f = graph->filters[i];
1239 
1240  for (j = 0; j < f->nb_inputs; j++) {
1241  AVFilterLink *link = f->inputs[j];
1242  AVFilterContext *fifo_ctx;
1243  const AVFilter *fifo;
1244  char name[32];
1245 
1246  if (!link->dstpad->needs_fifo)
1247  continue;
1248 
1249  fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1250  avfilter_get_by_name("fifo") :
1251  avfilter_get_by_name("afifo");
1252 
1253  snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1254 
1255  ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1256  NULL, graph);
1257  if (ret < 0)
1258  return ret;
1259 
1260  ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1261  if (ret < 0)
1262  return ret;
1263  }
1264  }
1265 
1266  return 0;
1267 }
1268 
1269 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1270 {
1271  int ret;
1272 
1273  if ((ret = graph_check_validity(graphctx, log_ctx)))
1274  return ret;
1275  if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1276  return ret;
1277  if ((ret = graph_config_formats(graphctx, log_ctx)))
1278  return ret;
1279  if ((ret = graph_config_links(graphctx, log_ctx)))
1280  return ret;
1281  if ((ret = graph_check_links(graphctx, log_ctx)))
1282  return ret;
1283  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1284  return ret;
1285 
1286  return 0;
1287 }
1288 
1289 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1290 {
1291  int i, r = AVERROR(ENOSYS);
1292 
1293  if (!graph)
1294  return r;
1295 
1296  if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1297  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1298  if (r != AVERROR(ENOSYS))
1299  return r;
1300  }
1301 
1302  if (res_len && res)
1303  res[0] = 0;
1304 
1305  for (i = 0; i < graph->nb_filters; i++) {
1306  AVFilterContext *filter = graph->filters[i];
1307  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1308  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1309  if (r != AVERROR(ENOSYS)) {
1310  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1311  return r;
1312  }
1313  }
1314  }
1315 
1316  return r;
1317 }
1318 
1319 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1320 {
1321  int i;
1322 
1323  if(!graph)
1324  return 0;
1325 
1326  for (i = 0; i < graph->nb_filters; i++) {
1327  AVFilterContext *filter = graph->filters[i];
1328  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1329  AVFilterCommand **queue = &filter->command_queue, *next;
1330  while (*queue && (*queue)->time <= ts)
1331  queue = &(*queue)->next;
1332  next = *queue;
1333  *queue = av_mallocz(sizeof(AVFilterCommand));
1334  if (!*queue)
1335  return AVERROR(ENOMEM);
1336 
1337  (*queue)->command = av_strdup(command);
1338  (*queue)->arg = av_strdup(arg);
1339  (*queue)->time = ts;
1340  (*queue)->flags = flags;
1341  (*queue)->next = next;
1342  if(flags & AVFILTER_CMD_FLAG_ONE)
1343  return 0;
1344  }
1345  }
1346 
1347  return 0;
1348 }
1349 
1350 static void heap_bubble_up(AVFilterGraph *graph,
1351  AVFilterLink *link, int index)
1352 {
1353  AVFilterLink **links = graph->sink_links;
1354 
1355  av_assert0(index >= 0);
1356 
1357  while (index) {
1358  int parent = (index - 1) >> 1;
1359  if (links[parent]->current_pts_us >= link->current_pts_us)
1360  break;
1361  links[index] = links[parent];
1362  links[index]->age_index = index;
1363  index = parent;
1364  }
1365  links[index] = link;
1366  link->age_index = index;
1367 }
1368 
1369 static void heap_bubble_down(AVFilterGraph *graph,
1370  AVFilterLink *link, int index)
1371 {
1372  AVFilterLink **links = graph->sink_links;
1373 
1374  av_assert0(index >= 0);
1375 
1376  while (1) {
1377  int child = 2 * index + 1;
1378  if (child >= graph->sink_links_count)
1379  break;
1380  if (child + 1 < graph->sink_links_count &&
1381  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1382  child++;
1383  if (link->current_pts_us < links[child]->current_pts_us)
1384  break;
1385  links[index] = links[child];
1386  links[index]->age_index = index;
1387  index = child;
1388  }
1389  links[index] = link;
1390  link->age_index = index;
1391 }
1392 
1394 {
1395  heap_bubble_up (graph, link, link->age_index);
1396  heap_bubble_down(graph, link, link->age_index);
1397 }
1398 
1400 {
1401  AVFilterLink *oldest = graph->sink_links[0];
1402  int64_t frame_count;
1403  int r;
1404 
1405  while (graph->sink_links_count) {
1406  oldest = graph->sink_links[0];
1407  if (oldest->dst->filter->activate) {
1408  /* For now, buffersink is the only filter implementing activate. */
1409  r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1411  if (r != AVERROR_EOF)
1412  return r;
1413  } else {
1414  r = ff_request_frame(oldest);
1415  }
1416  if (r != AVERROR_EOF)
1417  break;
1418  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1419  oldest->dst ? oldest->dst->name : "unknown",
1420  oldest->dstpad ? oldest->dstpad->name : "unknown");
1421  /* EOF: remove the link from the heap */
1422  if (oldest->age_index < --graph->sink_links_count)
1423  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1424  oldest->age_index);
1425  oldest->age_index = -1;
1426  }
1427  if (!graph->sink_links_count)
1428  return AVERROR_EOF;
1429  av_assert1(!oldest->dst->filter->activate);
1430  av_assert1(oldest->age_index >= 0);
1431  frame_count = oldest->frame_count_out;
1432  while (frame_count == oldest->frame_count_out) {
1433  r = ff_filter_graph_run_once(graph);
1434  if (r == AVERROR(EAGAIN) &&
1435  !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1436  !oldest->status_in)
1437  ff_request_frame(oldest);
1438  else if (r < 0)
1439  return r;
1440  }
1441  return 0;
1442 }
1443 
1445 {
1447  unsigned i;
1448 
1449  av_assert0(graph->nb_filters);
1450  filter = graph->filters[0];
1451  for (i = 1; i < graph->nb_filters; i++)
1452  if (graph->filters[i]->ready > filter->ready)
1453  filter = graph->filters[i];
1454  if (!filter->ready)
1455  return AVERROR(EAGAIN);
1456  return ff_filter_activate(filter);
1457 }
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:581
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
static const char * format[]
Definition: af_aiir.c:339
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:645
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
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
static void swap_sample_fmts(AVFilterGraph *graph)
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:742
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
misc image utilities
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:83
#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:1014
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:1357
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:116
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
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)
int(* activate)(AVFilterContext *ctx)
Filter activation function.
Definition: avfilter.h:327
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:247
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:333
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:355
#define OFFSET(x)
Definition: avfiltergraph.c:45
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:346
char * name
name of this filter instance
Definition: avfilter.h:343
#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:349
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, int clip)
Definition: cfhd.c:196
unsigned ready
Ready status of the filter.
Definition: avfilter.h:408
AVOptions.
#define FF_LAYOUT2COUNT(l)
Decode a channel count encoded as a channel layout.
Definition: formats.h:108
#define f(width, name)
Definition: cbs_vp9.c:255
struct AVFilterFormats *** refs
references to this list
Definition: formats.h:69
#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:277
#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:349
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:345
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#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:600
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:342
#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:351
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
const char * r
Definition: vf_curves.c:114
#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().
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:336
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:287
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:117
#define CH_DIRECT_PAIR
#define fail()
Definition: checkasm.h:123
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: allfilters.c:520
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
const char * name
Definition: qsvenc.c:46
audio channel layout utility functions
static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
#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:49
#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
#define s(width, name)
Definition: cbs_vp9.c:257
unsigned nb_formats
number of formats
Definition: formats.h:65
#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:691
#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 (...
Definition: formats.c:431
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:919
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:240
void ff_graph_thread_free(AVFilterGraph *graph)
Definition: avfiltergraph.c:71
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:629
sample_rate
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:255
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
#define abs(x)
Definition: cuda_runtime.h:35
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
#define V
Definition: avfiltergraph.c:47
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_drawtext.c:871
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:511
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
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
int index
Definition: gxfenc.c:89
int(* query_formats)(AVFilterContext *)
Query formats supported by the filter on its inputs and outputs.
Definition: avfilter.h:282
#define AVFILTER_CMD_FLAG_FAST
Only execute command when its fast (like a video out that supports contrast adjustment in hw) ...
Definition: avfilter.h:692
#define CH_BACK_PAIR
cl_device_type type
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:506
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:350
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:425
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:76
#define flags(name, subs,...)
Definition: cbs_av1.c:564
#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:75
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:380
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.
int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of a plane of an image with...
Definition: imgutils.c:253
unsigned bps
Definition: movenc.c:1533
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:2838
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;.
#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:139
#define F
Definition: avfiltergraph.c:46
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 int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
static const AVClass filtergraph_class
Definition: avfiltergraph.c:62
An instance of a filter.
Definition: avfilter.h:338
#define av_freep(p)
#define CH_SIDE_PAIR
FFFrameQueueGlobal frame_queues
Definition: internal.h:140
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:126
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
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:2465
static int filter_query_formats(AVFilterContext *ctx)
AVFilterFormats * ff_merge_samplerates(AVFilterFormats *a, AVFilterFormats *b)
Definition: formats.c:139
internal API functions
#define A
Definition: avfiltergraph.c:48
int ff_filter_activate(AVFilterContext *filter)
Definition: avfilter.c:1416
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define CH_WIDE_PAIR
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:588
unsigned disable_auto_convert
Definition: avfilter.h:909
static int graph_config_pointers(AVFilterGraph *graph, AVClass *log_ctx)
int * formats
list of media formats
Definition: formats.h:66