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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/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 {
271  AVFilterContext *f;
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  av_freep(&a->formats);
423  av_freep(&b->formats);
424  av_freep(&a);
425  av_freep(&b);
426  return 0;
427  }
428 }
429 
430 /**
431  * Perform one round of query_formats() and merging formats lists on the
432  * filter graph.
433  * @return >=0 if all links formats lists could be queried and merged;
434  * AVERROR(EAGAIN) some progress was made in the queries or merging
435  * and a later call may succeed;
436  * AVERROR(EIO) (may be changed) plus a log message if no progress
437  * was made and the negotiation is stuck;
438  * a negative error code if some other error happened
439  */
440 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
441 {
442  int i, j, ret;
443  int scaler_count = 0, resampler_count = 0;
444  int count_queried = 0; /* successful calls to query_formats() */
445  int count_merged = 0; /* successful merge of formats lists */
446  int count_already_merged = 0; /* lists already merged */
447  int count_delayed = 0; /* lists that need to be merged later */
448 
449  for (i = 0; i < graph->nb_filters; i++) {
450  AVFilterContext *f = graph->filters[i];
451  if (formats_declared(f))
452  continue;
453  if (f->filter->query_formats)
454  ret = filter_query_formats(f);
455  else
456  ret = ff_default_query_formats(f);
457  if (ret < 0 && ret != AVERROR(EAGAIN))
458  return ret;
459  /* note: EAGAIN could indicate a partial success, not counted yet */
460  count_queried += ret >= 0;
461  }
462 
463  /* go through and merge as many format lists as possible */
464  for (i = 0; i < graph->nb_filters; i++) {
465  AVFilterContext *filter = graph->filters[i];
466 
467  for (j = 0; j < filter->nb_inputs; j++) {
468  AVFilterLink *link = filter->inputs[j];
469  int convert_needed = 0;
470 
471  if (!link)
472  continue;
473 
474  if (link->in_formats != link->out_formats
475  && link->in_formats && link->out_formats)
476  if (!can_merge_formats(link->in_formats, link->out_formats,
477  link->type, 0))
478  convert_needed = 1;
479  if (link->type == AVMEDIA_TYPE_AUDIO) {
480  if (link->in_samplerates != link->out_samplerates
481  && link->in_samplerates && link->out_samplerates)
483  link->out_samplerates,
484  0, 1))
485  convert_needed = 1;
486  }
487 
488 #define MERGE_DISPATCH(field, statement) \
489  if (!(link->in_ ## field && link->out_ ## field)) { \
490  count_delayed++; \
491  } else if (link->in_ ## field == link->out_ ## field) { \
492  count_already_merged++; \
493  } else if (!convert_needed) { \
494  count_merged++; \
495  statement \
496  }
497 
498  if (link->type == AVMEDIA_TYPE_AUDIO) {
501  link->out_channel_layouts))
502  convert_needed = 1;
503  )
504  MERGE_DISPATCH(samplerates,
506  link->out_samplerates))
507  convert_needed = 1;
508  )
509  }
511  if (!ff_merge_formats(link->in_formats, link->out_formats,
512  link->type))
513  convert_needed = 1;
514  )
515 #undef MERGE_DISPATCH
516 
517  if (convert_needed) {
519  const AVFilter *filter;
520  AVFilterLink *inlink, *outlink;
521  char inst_name[30];
522 
523  if (graph->disable_auto_convert) {
524  av_log(log_ctx, AV_LOG_ERROR,
525  "The filters '%s' and '%s' do not have a common format "
526  "and automatic conversion is disabled.\n",
527  link->src->name, link->dst->name);
528  return AVERROR(EINVAL);
529  }
530 
531  /* couldn't merge format lists. auto-insert conversion filter */
532  switch (link->type) {
533  case AVMEDIA_TYPE_VIDEO:
534  if (!(filter = avfilter_get_by_name("scale"))) {
535  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
536  "not present, cannot convert pixel formats.\n");
537  return AVERROR(EINVAL);
538  }
539 
540  snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
541  scaler_count++);
542 
543  if ((ret = avfilter_graph_create_filter(&convert, filter,
544  inst_name, graph->scale_sws_opts, NULL,
545  graph)) < 0)
546  return ret;
547  break;
548  case AVMEDIA_TYPE_AUDIO:
549  if (!(filter = avfilter_get_by_name("aresample"))) {
550  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
551  "not present, cannot convert audio formats.\n");
552  return AVERROR(EINVAL);
553  }
554 
555  snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
556  resampler_count++);
557  if ((ret = avfilter_graph_create_filter(&convert, filter,
558  inst_name, graph->aresample_swr_opts,
559  NULL, graph)) < 0)
560  return ret;
561  break;
562  default:
563  return AVERROR(EINVAL);
564  }
565 
566  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
567  return ret;
568 
569  if ((ret = filter_query_formats(convert)) < 0)
570  return ret;
571 
572  inlink = convert->inputs[0];
573  outlink = convert->outputs[0];
574  av_assert0( inlink-> in_formats->refcount > 0);
575  av_assert0( inlink->out_formats->refcount > 0);
576  av_assert0(outlink-> in_formats->refcount > 0);
577  av_assert0(outlink->out_formats->refcount > 0);
578  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
579  av_assert0( inlink-> in_samplerates->refcount > 0);
580  av_assert0( inlink->out_samplerates->refcount > 0);
581  av_assert0(outlink-> in_samplerates->refcount > 0);
582  av_assert0(outlink->out_samplerates->refcount > 0);
583  av_assert0( inlink-> in_channel_layouts->refcount > 0);
584  av_assert0( inlink->out_channel_layouts->refcount > 0);
585  av_assert0(outlink-> in_channel_layouts->refcount > 0);
586  av_assert0(outlink->out_channel_layouts->refcount > 0);
587  }
588  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
589  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
590  ret = AVERROR(ENOSYS);
591  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
593  inlink->out_samplerates) ||
595  inlink->out_channel_layouts)))
596  ret = AVERROR(ENOSYS);
597  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
599  outlink->out_samplerates) ||
601  outlink->out_channel_layouts)))
602  ret = AVERROR(ENOSYS);
603 
604  if (ret < 0) {
605  av_log(log_ctx, AV_LOG_ERROR,
606  "Impossible to convert between the formats supported by the filter "
607  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
608  return ret;
609  }
610  }
611  }
612  }
613 
614  av_log(graph, AV_LOG_DEBUG, "query_formats: "
615  "%d queried, %d merged, %d already done, %d delayed\n",
616  count_queried, count_merged, count_already_merged, count_delayed);
617  if (count_delayed) {
618  AVBPrint bp;
619 
620  /* if count_queried > 0, one filter at least did set its formats,
621  that will give additional information to its neighbour;
622  if count_merged > 0, one pair of formats lists at least was merged,
623  that will give additional information to all connected filters;
624  in both cases, progress was made and a new round must be done */
625  if (count_queried || count_merged)
626  return AVERROR(EAGAIN);
628  for (i = 0; i < graph->nb_filters; i++)
629  if (!formats_declared(graph->filters[i]))
630  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
631  graph->filters[i]->name);
632  av_log(graph, AV_LOG_ERROR,
633  "The following filters could not choose their formats: %s\n"
634  "Consider inserting the (a)format filter near their input or "
635  "output.\n", bp.str);
636  return AVERROR(EIO);
637  }
638  return 0;
639 }
640 
641 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
642 {
643  int score = 0;
644 
645  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
646  score ++;
647 
648  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
649  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
650  }else
651  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
652 
655  score += 20;
656 
659  score += 2;
660 
661  return score;
662 }
663 
665  enum AVSampleFormat src_fmt)
666 {
667  int score1, score2;
668 
669  score1 = get_fmt_score(dst_fmt1, src_fmt);
670  score2 = get_fmt_score(dst_fmt2, src_fmt);
671 
672  return score1 < score2 ? dst_fmt1 : dst_fmt2;
673 }
674 
676 {
677  if (!link || !link->in_formats)
678  return 0;
679 
680  if (link->type == AVMEDIA_TYPE_VIDEO) {
681  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
682  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
683  enum AVPixelFormat best= AV_PIX_FMT_NONE;
684  int i;
685  for (i=0; i<link->in_formats->nb_formats; i++) {
686  enum AVPixelFormat p = link->in_formats->formats[i];
687  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
688  }
689  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
691  av_get_pix_fmt_name(ref->format), has_alpha);
692  link->in_formats->formats[0] = best;
693  }
694  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
695  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
697  int i;
698  for (i=0; i<link->in_formats->nb_formats; i++) {
699  enum AVSampleFormat p = link->in_formats->formats[i];
700  best = find_best_sample_fmt_of_2(best, p, ref->format);
701  }
702  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
705  link->in_formats->formats[0] = best;
706  }
707  }
708 
709  link->in_formats->nb_formats = 1;
710  link->format = link->in_formats->formats[0];
711 
712  if (link->type == AVMEDIA_TYPE_AUDIO) {
713  if (!link->in_samplerates->nb_formats) {
714  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
715  " the link between filters %s and %s.\n", link->src->name,
716  link->dst->name);
717  return AVERROR(EINVAL);
718  }
719  link->in_samplerates->nb_formats = 1;
720  link->sample_rate = link->in_samplerates->formats[0];
721 
722  if (link->in_channel_layouts->all_layouts) {
723  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
724  " the link between filters %s and %s.\n", link->src->name,
725  link->dst->name);
726  if (!link->in_channel_layouts->all_counts)
727  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
728  "supported, try specifying a channel layout using "
729  "'aformat=channel_layouts=something'.\n");
730  return AVERROR(EINVAL);
731  }
734  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
735  link->channel_layout = 0;
736  else
738  }
739 
746 
747  return 0;
748 }
749 
750 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
751 do { \
752  for (i = 0; i < filter->nb_inputs; i++) { \
753  AVFilterLink *link = filter->inputs[i]; \
754  fmt_type fmt; \
755  \
756  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
757  continue; \
758  fmt = link->out_ ## list->var[0]; \
759  \
760  for (j = 0; j < filter->nb_outputs; j++) { \
761  AVFilterLink *out_link = filter->outputs[j]; \
762  list_type *fmts; \
763  \
764  if (link->type != out_link->type || \
765  out_link->in_ ## list->nb == 1) \
766  continue; \
767  fmts = out_link->in_ ## list; \
768  \
769  if (!out_link->in_ ## list->nb) { \
770  if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
771  return ret; \
772  ret = 1; \
773  break; \
774  } \
775  \
776  for (k = 0; k < out_link->in_ ## list->nb; k++) \
777  if (fmts->var[k] == fmt) { \
778  fmts->var[0] = fmt; \
779  fmts->nb = 1; \
780  ret = 1; \
781  break; \
782  } \
783  } \
784  } \
785 } while (0)
786 
788 {
789  int i, j, k, ret = 0;
790 
792  nb_formats, ff_add_format, ff_formats_unref);
793  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
794  nb_formats, ff_add_format, ff_formats_unref);
795 
796  /* reduce channel layouts */
797  for (i = 0; i < filter->nb_inputs; i++) {
798  AVFilterLink *inlink = filter->inputs[i];
799  uint64_t fmt;
800 
801  if (!inlink->out_channel_layouts ||
803  continue;
804  fmt = inlink->out_channel_layouts->channel_layouts[0];
805 
806  for (j = 0; j < filter->nb_outputs; j++) {
807  AVFilterLink *outlink = filter->outputs[j];
809 
810  fmts = outlink->in_channel_layouts;
811  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
812  continue;
813 
814  if (fmts->all_layouts &&
815  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
816  /* Turn the infinite list into a singleton */
817  fmts->all_layouts = fmts->all_counts = 0;
818  if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
819  ret = 1;
820  break;
821  }
822 
823  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
824  if (fmts->channel_layouts[k] == fmt) {
825  fmts->channel_layouts[0] = fmt;
826  fmts->nb_channel_layouts = 1;
827  ret = 1;
828  break;
829  }
830  }
831  }
832  }
833 
834  return ret;
835 }
836 
837 static int reduce_formats(AVFilterGraph *graph)
838 {
839  int i, reduced, ret;
840 
841  do {
842  reduced = 0;
843 
844  for (i = 0; i < graph->nb_filters; i++) {
845  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
846  return ret;
847  reduced |= ret;
848  }
849  } while (reduced);
850 
851  return 0;
852 }
853 
855 {
856  AVFilterLink *link = NULL;
857  int sample_rate;
858  int i, j;
859 
860  for (i = 0; i < filter->nb_inputs; i++) {
861  link = filter->inputs[i];
862 
863  if (link->type == AVMEDIA_TYPE_AUDIO &&
864  link->out_samplerates->nb_formats== 1)
865  break;
866  }
867  if (i == filter->nb_inputs)
868  return;
869 
870  sample_rate = link->out_samplerates->formats[0];
871 
872  for (i = 0; i < filter->nb_outputs; i++) {
873  AVFilterLink *outlink = filter->outputs[i];
874  int best_idx, best_diff = INT_MAX;
875 
876  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
877  outlink->in_samplerates->nb_formats < 2)
878  continue;
879 
880  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
881  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
882 
883  av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
884 
885  if (diff < best_diff) {
886  best_diff = diff;
887  best_idx = j;
888  }
889  }
890  FFSWAP(int, outlink->in_samplerates->formats[0],
891  outlink->in_samplerates->formats[best_idx]);
892  }
893 }
894 
895 static void swap_samplerates(AVFilterGraph *graph)
896 {
897  int i;
898 
899  for (i = 0; i < graph->nb_filters; i++)
901 }
902 
903 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
904 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
905 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
906 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
907 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
908 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
909 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
910 
911 /* allowable substitutions for channel pairs when comparing layouts,
912  * ordered by priority for both values */
913 static const uint64_t ch_subst[][2] = {
935 };
936 
938 {
939  AVFilterLink *link = NULL;
940  int i, j, k;
941 
942  for (i = 0; i < filter->nb_inputs; i++) {
943  link = filter->inputs[i];
944 
945  if (link->type == AVMEDIA_TYPE_AUDIO &&
947  break;
948  }
949  if (i == filter->nb_inputs)
950  return;
951 
952  for (i = 0; i < filter->nb_outputs; i++) {
953  AVFilterLink *outlink = filter->outputs[i];
954  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
955 
956  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
958  continue;
959 
960  for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
961  uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
962  uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
963  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
964  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
965  int count_diff = out_channels - in_channels;
966  int matched_channels, extra_channels;
967  int score = 100000;
968 
969  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
970  /* Compute score in case the input or output layout encodes
971  a channel count; in this case the score is not altered by
972  the computation afterwards, as in_chlayout and
973  out_chlayout have both been set to 0 */
974  if (FF_LAYOUT2COUNT(in_chlayout))
975  in_channels = FF_LAYOUT2COUNT(in_chlayout);
976  if (FF_LAYOUT2COUNT(out_chlayout))
977  out_channels = FF_LAYOUT2COUNT(out_chlayout);
978  score -= 10000 + FFABS(out_channels - in_channels) +
979  (in_channels > out_channels ? 10000 : 0);
980  in_chlayout = out_chlayout = 0;
981  /* Let the remaining computation run, even if the score
982  value is not altered */
983  }
984 
985  /* channel substitution */
986  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
987  uint64_t cmp0 = ch_subst[k][0];
988  uint64_t cmp1 = ch_subst[k][1];
989  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
990  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
991  in_chlayout &= ~cmp0;
992  out_chlayout &= ~cmp1;
993  /* add score for channel match, minus a deduction for
994  having to do the substitution */
995  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
996  }
997  }
998 
999  /* no penalty for LFE channel mismatch */
1000  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
1001  (out_chlayout & AV_CH_LOW_FREQUENCY))
1002  score += 10;
1003  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1004  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1005 
1006  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1007  out_chlayout);
1008  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1009  (~in_chlayout));
1010  score += 10 * matched_channels - 5 * extra_channels;
1011 
1012  if (score > best_score ||
1013  (count_diff < best_count_diff && score == best_score)) {
1014  best_score = score;
1015  best_idx = j;
1016  best_count_diff = count_diff;
1017  }
1018  }
1019  av_assert0(best_idx >= 0);
1020  FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1021  outlink->in_channel_layouts->channel_layouts[best_idx]);
1022  }
1023 
1024 }
1025 
1027 {
1028  int i;
1029 
1030  for (i = 0; i < graph->nb_filters; i++)
1032 }
1033 
1035 {
1036  AVFilterLink *link = NULL;
1037  int format, bps;
1038  int i, j;
1039 
1040  for (i = 0; i < filter->nb_inputs; i++) {
1041  link = filter->inputs[i];
1042 
1043  if (link->type == AVMEDIA_TYPE_AUDIO &&
1044  link->out_formats->nb_formats == 1)
1045  break;
1046  }
1047  if (i == filter->nb_inputs)
1048  return;
1049 
1050  format = link->out_formats->formats[0];
1051  bps = av_get_bytes_per_sample(format);
1052 
1053  for (i = 0; i < filter->nb_outputs; i++) {
1054  AVFilterLink *outlink = filter->outputs[i];
1055  int best_idx = -1, best_score = INT_MIN;
1056 
1057  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1058  outlink->in_formats->nb_formats < 2)
1059  continue;
1060 
1061  for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1062  int out_format = outlink->in_formats->formats[j];
1063  int out_bps = av_get_bytes_per_sample(out_format);
1064  int score;
1065 
1066  if (av_get_packed_sample_fmt(out_format) == format ||
1067  av_get_planar_sample_fmt(out_format) == format) {
1068  best_idx = j;
1069  break;
1070  }
1071 
1072  /* for s32 and float prefer double to prevent loss of information */
1073  if (bps == 4 && out_bps == 8) {
1074  best_idx = j;
1075  break;
1076  }
1077 
1078  /* prefer closest higher or equal bps */
1079  score = -abs(out_bps - bps);
1080  if (out_bps >= bps)
1081  score += INT_MAX/2;
1082 
1083  if (score > best_score) {
1084  best_score = score;
1085  best_idx = j;
1086  }
1087  }
1088  av_assert0(best_idx >= 0);
1089  FFSWAP(int, outlink->in_formats->formats[0],
1090  outlink->in_formats->formats[best_idx]);
1091  }
1092 }
1093 
1094 static void swap_sample_fmts(AVFilterGraph *graph)
1095 {
1096  int i;
1097 
1098  for (i = 0; i < graph->nb_filters; i++)
1100 
1101 }
1102 
1103 static int pick_formats(AVFilterGraph *graph)
1104 {
1105  int i, j, ret;
1106  int change;
1107 
1108  do{
1109  change = 0;
1110  for (i = 0; i < graph->nb_filters; i++) {
1111  AVFilterContext *filter = graph->filters[i];
1112  if (filter->nb_inputs){
1113  for (j = 0; j < filter->nb_inputs; j++){
1114  if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1115  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1116  return ret;
1117  change = 1;
1118  }
1119  }
1120  }
1121  if (filter->nb_outputs){
1122  for (j = 0; j < filter->nb_outputs; j++){
1123  if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1124  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1125  return ret;
1126  change = 1;
1127  }
1128  }
1129  }
1130  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1131  for (j = 0; j < filter->nb_outputs; j++) {
1132  if(filter->outputs[j]->format<0) {
1133  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1134  return ret;
1135  change = 1;
1136  }
1137  }
1138  }
1139  }
1140  }while(change);
1141 
1142  for (i = 0; i < graph->nb_filters; i++) {
1143  AVFilterContext *filter = graph->filters[i];
1144 
1145  for (j = 0; j < filter->nb_inputs; j++)
1146  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1147  return ret;
1148  for (j = 0; j < filter->nb_outputs; j++)
1149  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1150  return ret;
1151  }
1152  return 0;
1153 }
1154 
1155 /**
1156  * Configure the formats of all the links in the graph.
1157  */
1158 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1159 {
1160  int ret;
1161 
1162  /* find supported formats from sub-filters, and merge along links */
1163  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1164  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1165  if (ret < 0)
1166  return ret;
1167 
1168  /* Once everything is merged, it's possible that we'll still have
1169  * multiple valid media format choices. We try to minimize the amount
1170  * of format conversion inside filters */
1171  if ((ret = reduce_formats(graph)) < 0)
1172  return ret;
1173 
1174  /* for audio filters, ensure the best format, sample rate and channel layout
1175  * is selected */
1176  swap_sample_fmts(graph);
1177  swap_samplerates(graph);
1178  swap_channel_layouts(graph);
1179 
1180  if ((ret = pick_formats(graph)) < 0)
1181  return ret;
1182 
1183  return 0;
1184 }
1185 
1187  AVClass *log_ctx)
1188 {
1189  unsigned i, j;
1190  int sink_links_count = 0, n = 0;
1191  AVFilterContext *f;
1192  AVFilterLink **sinks;
1193 
1194  for (i = 0; i < graph->nb_filters; i++) {
1195  f = graph->filters[i];
1196  for (j = 0; j < f->nb_inputs; j++) {
1197  f->inputs[j]->graph = graph;
1198  f->inputs[j]->age_index = -1;
1199  }
1200  for (j = 0; j < f->nb_outputs; j++) {
1201  f->outputs[j]->graph = graph;
1202  f->outputs[j]->age_index= -1;
1203  }
1204  if (!f->nb_outputs) {
1205  if (f->nb_inputs > INT_MAX - sink_links_count)
1206  return AVERROR(EINVAL);
1207  sink_links_count += f->nb_inputs;
1208  }
1209  }
1210  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1211  if (!sinks)
1212  return AVERROR(ENOMEM);
1213  for (i = 0; i < graph->nb_filters; i++) {
1214  f = graph->filters[i];
1215  if (!f->nb_outputs) {
1216  for (j = 0; j < f->nb_inputs; j++) {
1217  sinks[n] = f->inputs[j];
1218  f->inputs[j]->age_index = n++;
1219  }
1220  }
1221  }
1222  av_assert0(n == sink_links_count);
1223  graph->sink_links = sinks;
1224  graph->sink_links_count = sink_links_count;
1225  return 0;
1226 }
1227 
1228 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1229 {
1230  AVFilterContext *f;
1231  int i, j, ret;
1232  int fifo_count = 0;
1233 
1234  for (i = 0; i < graph->nb_filters; i++) {
1235  f = graph->filters[i];
1236 
1237  for (j = 0; j < f->nb_inputs; j++) {
1238  AVFilterLink *link = f->inputs[j];
1239  AVFilterContext *fifo_ctx;
1240  const AVFilter *fifo;
1241  char name[32];
1242 
1243  if (!link->dstpad->needs_fifo)
1244  continue;
1245 
1246  fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1247  avfilter_get_by_name("fifo") :
1248  avfilter_get_by_name("afifo");
1249 
1250  snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1251 
1252  ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1253  NULL, graph);
1254  if (ret < 0)
1255  return ret;
1256 
1257  ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1258  if (ret < 0)
1259  return ret;
1260  }
1261  }
1262 
1263  return 0;
1264 }
1265 
1266 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1267 {
1268  int ret;
1269 
1270  if ((ret = graph_check_validity(graphctx, log_ctx)))
1271  return ret;
1272  if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1273  return ret;
1274  if ((ret = graph_config_formats(graphctx, log_ctx)))
1275  return ret;
1276  if ((ret = graph_config_links(graphctx, log_ctx)))
1277  return ret;
1278  if ((ret = graph_check_links(graphctx, log_ctx)))
1279  return ret;
1280  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1281  return ret;
1282 
1283  return 0;
1284 }
1285 
1286 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1287 {
1288  int i, r = AVERROR(ENOSYS);
1289 
1290  if (!graph)
1291  return r;
1292 
1293  if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1294  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1295  if (r != AVERROR(ENOSYS))
1296  return r;
1297  }
1298 
1299  if (res_len && res)
1300  res[0] = 0;
1301 
1302  for (i = 0; i < graph->nb_filters; i++) {
1303  AVFilterContext *filter = graph->filters[i];
1304  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1305  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1306  if (r != AVERROR(ENOSYS)) {
1307  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1308  return r;
1309  }
1310  }
1311  }
1312 
1313  return r;
1314 }
1315 
1316 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1317 {
1318  int i;
1319 
1320  if(!graph)
1321  return 0;
1322 
1323  for (i = 0; i < graph->nb_filters; i++) {
1324  AVFilterContext *filter = graph->filters[i];
1325  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1326  AVFilterCommand **queue = &filter->command_queue, *next;
1327  while (*queue && (*queue)->time <= ts)
1328  queue = &(*queue)->next;
1329  next = *queue;
1330  *queue = av_mallocz(sizeof(AVFilterCommand));
1331  if (!*queue)
1332  return AVERROR(ENOMEM);
1333 
1334  (*queue)->command = av_strdup(command);
1335  (*queue)->arg = av_strdup(arg);
1336  (*queue)->time = ts;
1337  (*queue)->flags = flags;
1338  (*queue)->next = next;
1339  if(flags & AVFILTER_CMD_FLAG_ONE)
1340  return 0;
1341  }
1342  }
1343 
1344  return 0;
1345 }
1346 
1347 static void heap_bubble_up(AVFilterGraph *graph,
1348  AVFilterLink *link, int index)
1349 {
1350  AVFilterLink **links = graph->sink_links;
1351 
1352  av_assert0(index >= 0);
1353 
1354  while (index) {
1355  int parent = (index - 1) >> 1;
1356  if (links[parent]->current_pts_us >= link->current_pts_us)
1357  break;
1358  links[index] = links[parent];
1359  links[index]->age_index = index;
1360  index = parent;
1361  }
1362  links[index] = link;
1363  link->age_index = index;
1364 }
1365 
1366 static void heap_bubble_down(AVFilterGraph *graph,
1367  AVFilterLink *link, int index)
1368 {
1369  AVFilterLink **links = graph->sink_links;
1370 
1371  av_assert0(index >= 0);
1372 
1373  while (1) {
1374  int child = 2 * index + 1;
1375  if (child >= graph->sink_links_count)
1376  break;
1377  if (child + 1 < graph->sink_links_count &&
1378  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1379  child++;
1380  if (link->current_pts_us < links[child]->current_pts_us)
1381  break;
1382  links[index] = links[child];
1383  links[index]->age_index = index;
1384  index = child;
1385  }
1386  links[index] = link;
1387  link->age_index = index;
1388 }
1389 
1391 {
1392  heap_bubble_up (graph, link, link->age_index);
1393  heap_bubble_down(graph, link, link->age_index);
1394 }
1395 
1397 {
1398  AVFilterLink *oldest = graph->sink_links[0];
1399  int64_t frame_count;
1400  int r;
1401 
1402  while (graph->sink_links_count) {
1403  oldest = graph->sink_links[0];
1404  if (oldest->dst->filter->activate) {
1405  /* For now, buffersink is the only filter implementing activate. */
1406  r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1408  if (r != AVERROR_EOF)
1409  return r;
1410  } else {
1411  r = ff_request_frame(oldest);
1412  }
1413  if (r != AVERROR_EOF)
1414  break;
1415  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1416  oldest->dst ? oldest->dst->name : "unknown",
1417  oldest->dstpad ? oldest->dstpad->name : "unknown");
1418  /* EOF: remove the link from the heap */
1419  if (oldest->age_index < --graph->sink_links_count)
1420  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1421  oldest->age_index);
1422  oldest->age_index = -1;
1423  }
1424  if (!graph->sink_links_count)
1425  return AVERROR_EOF;
1426  av_assert1(!oldest->dst->filter->activate);
1427  av_assert1(oldest->age_index >= 0);
1428  frame_count = oldest->frame_count_out;
1429  while (frame_count == oldest->frame_count_out) {
1430  r = ff_filter_graph_run_once(graph);
1431  if (r == AVERROR(EAGAIN) &&
1432  !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1433  !oldest->status_in)
1434  ff_request_frame(oldest);
1435  else if (r < 0)
1436  return r;
1437  }
1438  return 0;
1439 }
1440 
1442 {
1444  unsigned i;
1445 
1446  av_assert0(graph->nb_filters);
1447  filter = graph->filters[0];
1448  for (i = 1; i < graph->nb_filters; i++)
1449  if (graph->filters[i]->ready > filter->ready)
1450  filter = graph->filters[i];
1451  if (!filter->ready)
1452  return AVERROR(EAGAIN);
1453  return ff_filter_activate(filter);
1454 }
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
static const char * format[]
Definition: af_aiir.c:311
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:663
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2363
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:760
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
const char * fmt
Definition: avisynth_c.h:769
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:1292
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:113
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
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:236
int(* query_formats)(AVFilterContext *)
Query formats supported by the filter on its inputs and outputs.
Definition: avfilter.h:282
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:244
#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:114
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
AVS_FilterInfo AVS_Value child
Definition: avisynth_c.h:731
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
static int flags
Definition: log.c:55
#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:345
#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
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
#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: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:283
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:116
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:430
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: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
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: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 (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:924
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:597
sample_rate
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
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
#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: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:557
GLint GLenum type
Definition: opengl_enc.c:105
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
#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
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:350
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:76
#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:1456
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:2653
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:150
#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:151
double time
time expressed in seconds
Definition: internal.h:39
int needs_fifo
The filter expects a fifo to be inserted on its input link, typically because it has a delay...
Definition: internal.h:137
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
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:2279
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:1421
int(* activate)(AVFilterContext *ctx)
Filter activation function.
Definition: avfilter.h:327
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:341
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