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avfiltergraph.c
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1 /*
2  * filter graphs
3  * Copyright (c) 2008 Vitor Sessak
4  * Copyright (c) 2007 Bobby Bingham
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 
25 #include <string.h>
26 
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/bprint.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 
35 #include "avfilter.h"
36 #include "formats.h"
37 #include "internal.h"
38 #include "thread.h"
39 
40 #define OFFSET(x) offsetof(AVFilterGraph, x)
41 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
42 static const AVOption filtergraph_options[] = {
43  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
44  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
45  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
46  { "threads", "Maximum number of threads", OFFSET(nb_threads),
47  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
48  {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
49  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
50  {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
51  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
52  { NULL },
53 };
54 
55 static const AVClass filtergraph_class = {
56  .class_name = "AVFilterGraph",
57  .item_name = av_default_item_name,
58  .version = LIBAVUTIL_VERSION_INT,
59  .option = filtergraph_options,
60  .category = AV_CLASS_CATEGORY_FILTER,
61 };
62 
63 #if !HAVE_THREADS
65 {
66 }
67 
69 {
70  graph->thread_type = 0;
71  graph->nb_threads = 1;
72  return 0;
73 }
74 #endif
75 
77 {
78  AVFilterGraph *ret = av_mallocz(sizeof(*ret));
79  if (!ret)
80  return NULL;
81 
82  ret->internal = av_mallocz(sizeof(*ret->internal));
83  if (!ret->internal) {
84  av_freep(&ret);
85  return NULL;
86  }
87 
90 
91  return ret;
92 }
93 
95 {
96  int i, j;
97  for (i = 0; i < graph->nb_filters; i++) {
98  if (graph->filters[i] == filter) {
99  FFSWAP(AVFilterContext*, graph->filters[i],
100  graph->filters[graph->nb_filters - 1]);
101  graph->nb_filters--;
102  filter->graph = NULL;
103  for (j = 0; j<filter->nb_outputs; j++)
104  if (filter->outputs[j])
105  filter->outputs[j]->graph = NULL;
106 
107  return;
108  }
109  }
110 }
111 
113 {
114  if (!*graph)
115  return;
116 
117  while ((*graph)->nb_filters)
118  avfilter_free((*graph)->filters[0]);
119 
120  ff_graph_thread_free(*graph);
121 
122  av_freep(&(*graph)->sink_links);
123 
124  av_freep(&(*graph)->scale_sws_opts);
125  av_freep(&(*graph)->aresample_swr_opts);
126  av_freep(&(*graph)->resample_lavr_opts);
127  av_freep(&(*graph)->filters);
128  av_freep(&(*graph)->internal);
129  av_freep(graph);
130 }
131 
132 #if FF_API_AVFILTER_OPEN
133 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
134 {
136  sizeof(*filters) * (graph->nb_filters + 1));
137  if (!filters)
138  return AVERROR(ENOMEM);
139 
140  graph->filters = filters;
141  graph->filters[graph->nb_filters++] = filter;
142 
143  filter->graph = graph;
144 
145  return 0;
146 }
147 #endif
148 
150  const char *name, const char *args, void *opaque,
151  AVFilterGraph *graph_ctx)
152 {
153  int ret;
154 
155  *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
156  if (!*filt_ctx)
157  return AVERROR(ENOMEM);
158 
159  ret = avfilter_init_str(*filt_ctx, args);
160  if (ret < 0)
161  goto fail;
162 
163  return 0;
164 
165 fail:
166  if (*filt_ctx)
167  avfilter_free(*filt_ctx);
168  *filt_ctx = NULL;
169  return ret;
170 }
171 
173 {
174  graph->disable_auto_convert = flags;
175 }
176 
178  const AVFilter *filter,
179  const char *name)
180 {
182 
183  if (graph->thread_type && !graph->internal->thread_execute) {
184  if (graph->execute) {
185  graph->internal->thread_execute = graph->execute;
186  } else {
187  int ret = ff_graph_thread_init(graph);
188  if (ret < 0) {
189  av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
190  return NULL;
191  }
192  }
193  }
194 
195  s = ff_filter_alloc(filter, name);
196  if (!s)
197  return NULL;
198 
199  filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
200  if (!filters) {
201  avfilter_free(s);
202  return NULL;
203  }
204 
205  graph->filters = filters;
206  graph->filters[graph->nb_filters++] = s;
207 
208  s->graph = graph;
209 
210  return s;
211 }
212 
213 /**
214  * Check for the validity of graph.
215  *
216  * A graph is considered valid if all its input and output pads are
217  * connected.
218  *
219  * @return >= 0 in case of success, a negative value otherwise
220  */
221 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
222 {
224  int i, j;
225 
226  for (i = 0; i < graph->nb_filters; i++) {
227  const AVFilterPad *pad;
228  filt = graph->filters[i];
229 
230  for (j = 0; j < filt->nb_inputs; j++) {
231  if (!filt->inputs[j] || !filt->inputs[j]->src) {
232  pad = &filt->input_pads[j];
233  av_log(log_ctx, AV_LOG_ERROR,
234  "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
235  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
236  return AVERROR(EINVAL);
237  }
238  }
239 
240  for (j = 0; j < filt->nb_outputs; j++) {
241  if (!filt->outputs[j] || !filt->outputs[j]->dst) {
242  pad = &filt->output_pads[j];
243  av_log(log_ctx, AV_LOG_ERROR,
244  "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
245  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
246  return AVERROR(EINVAL);
247  }
248  }
249  }
250 
251  return 0;
252 }
253 
254 /**
255  * Configure all the links of graphctx.
256  *
257  * @return >= 0 in case of success, a negative value otherwise
258  */
259 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
260 {
262  int i, ret;
263 
264  for (i = 0; i < graph->nb_filters; i++) {
265  filt = graph->filters[i];
266 
267  if (!filt->nb_outputs) {
268  if ((ret = avfilter_config_links(filt)))
269  return ret;
270  }
271  }
272 
273  return 0;
274 }
275 
277 {
278  int i;
279 
280  for (i = 0; i < graph->nb_filters; i++)
281  if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
282  return graph->filters[i];
283 
284  return NULL;
285 }
286 
288 {
289  if (!l)
290  return;
291  if (l->nb_channel_layouts) {
292  if (l->all_layouts || l->all_counts)
293  av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
294  l->all_layouts = l->all_counts = 0;
295  } else {
296  if (l->all_counts && !l->all_layouts)
297  av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
298  l->all_layouts = 1;
299  }
300 }
301 
303 {
304  int ret, i;
306  AVFilterChannelLayouts *chlayouts;
307  AVFilterFormats *samplerates;
308  enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
309  ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
311 
312  if ((ret = ctx->filter->query_formats(ctx)) < 0) {
313  if (ret != AVERROR(EAGAIN))
314  av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
315  ctx->name, av_err2str(ret));
316  return ret;
317  }
318 
319  for (i = 0; i < ctx->nb_inputs; i++)
321  for (i = 0; i < ctx->nb_outputs; i++)
323 
324  formats = ff_all_formats(type);
325  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
326  return ret;
327  if (type == AVMEDIA_TYPE_AUDIO) {
328  samplerates = ff_all_samplerates();
329  if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
330  return ret;
331  chlayouts = ff_all_channel_layouts();
332  if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
333  return ret;
334  }
335  return 0;
336 }
337 
339 {
340  int i;
341 
342  for (i = 0; i < f->nb_inputs; i++) {
343  if (!f->inputs[i]->out_formats)
344  return 0;
345  if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
346  !(f->inputs[i]->out_samplerates &&
347  f->inputs[i]->out_channel_layouts))
348  return 0;
349  }
350  for (i = 0; i < f->nb_outputs; i++) {
351  if (!f->outputs[i]->in_formats)
352  return 0;
353  if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
354  !(f->outputs[i]->in_samplerates &&
355  f->outputs[i]->in_channel_layouts))
356  return 0;
357  }
358  return 1;
359 }
360 
362 {
363  AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
364  if (a) {
365  a->refcount = 0;
366  a->refs = NULL;
367  a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
368  if (!a->formats && arg->formats)
369  av_freep(&a);
370  }
371  return a;
372 }
373 
375  AVFilterFormats *b_arg,
376  enum AVMediaType type,
377  int is_sample_rate)
378 {
379  AVFilterFormats *a, *b, *ret;
380  if (a_arg == b_arg)
381  return 1;
382  a = clone_filter_formats(a_arg);
383  b = clone_filter_formats(b_arg);
384 
385  if (!a || !b) {
386  if (a)
387  av_freep(&a->formats);
388  if (b)
389  av_freep(&b->formats);
390 
391  av_freep(&a);
392  av_freep(&b);
393 
394  return 0;
395  }
396 
397  if (is_sample_rate) {
398  ret = ff_merge_samplerates(a, b);
399  } else {
400  ret = ff_merge_formats(a, b, type);
401  }
402  if (ret) {
403  av_freep(&ret->formats);
404  av_freep(&ret->refs);
405  av_freep(&ret);
406  return 1;
407  } else {
408  av_freep(&a->formats);
409  av_freep(&b->formats);
410  av_freep(&a);
411  av_freep(&b);
412  return 0;
413  }
414 }
415 
416 /**
417  * Perform one round of query_formats() and merging formats lists on the
418  * filter graph.
419  * @return >=0 if all links formats lists could be queried and merged;
420  * AVERROR(EAGAIN) some progress was made in the queries or merging
421  * and a later call may succeed;
422  * AVERROR(EIO) (may be changed) plus a log message if no progress
423  * was made and the negotiation is stuck;
424  * a negative error code if some other error happened
425  */
426 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
427 {
428  int i, j, ret;
429  int scaler_count = 0, resampler_count = 0;
430  int count_queried = 0; /* successful calls to query_formats() */
431  int count_merged = 0; /* successful merge of formats lists */
432  int count_already_merged = 0; /* lists already merged */
433  int count_delayed = 0; /* lists that need to be merged later */
434 
435  for (i = 0; i < graph->nb_filters; i++) {
436  AVFilterContext *f = graph->filters[i];
437  if (formats_declared(f))
438  continue;
439  if (f->filter->query_formats)
440  ret = filter_query_formats(f);
441  else
442  ret = ff_default_query_formats(f);
443  if (ret < 0 && ret != AVERROR(EAGAIN))
444  return ret;
445  /* note: EAGAIN could indicate a partial success, not counted yet */
446  count_queried += ret >= 0;
447  }
448 
449  /* go through and merge as many format lists as possible */
450  for (i = 0; i < graph->nb_filters; i++) {
451  AVFilterContext *filter = graph->filters[i];
452 
453  for (j = 0; j < filter->nb_inputs; j++) {
454  AVFilterLink *link = filter->inputs[j];
455  int convert_needed = 0;
456 
457  if (!link)
458  continue;
459 
460  if (link->in_formats != link->out_formats
461  && link->in_formats && link->out_formats)
462  if (!can_merge_formats(link->in_formats, link->out_formats,
463  link->type, 0))
464  convert_needed = 1;
465  if (link->type == AVMEDIA_TYPE_AUDIO) {
466  if (link->in_samplerates != link->out_samplerates
467  && link->in_samplerates && link->out_samplerates)
469  link->out_samplerates,
470  0, 1))
471  convert_needed = 1;
472  }
473 
474 #define MERGE_DISPATCH(field, statement) \
475  if (!(link->in_ ## field && link->out_ ## field)) { \
476  count_delayed++; \
477  } else if (link->in_ ## field == link->out_ ## field) { \
478  count_already_merged++; \
479  } else if (!convert_needed) { \
480  count_merged++; \
481  statement \
482  }
483 
484  if (link->type == AVMEDIA_TYPE_AUDIO) {
487  link->out_channel_layouts))
488  convert_needed = 1;
489  )
490  MERGE_DISPATCH(samplerates,
492  link->out_samplerates))
493  convert_needed = 1;
494  )
495  }
497  if (!ff_merge_formats(link->in_formats, link->out_formats,
498  link->type))
499  convert_needed = 1;
500  )
501 #undef MERGE_DISPATCH
502 
503  if (convert_needed) {
505  AVFilter *filter;
506  AVFilterLink *inlink, *outlink;
507  char scale_args[256];
508  char inst_name[30];
509 
510  if (graph->disable_auto_convert) {
511  av_log(log_ctx, AV_LOG_ERROR,
512  "The filters '%s' and '%s' do not have a common format "
513  "and automatic conversion is disabled.\n",
514  link->src->name, link->dst->name);
515  return AVERROR(EINVAL);
516  }
517 
518  /* couldn't merge format lists. auto-insert conversion filter */
519  switch (link->type) {
520  case AVMEDIA_TYPE_VIDEO:
521  if (!(filter = avfilter_get_by_name("scale"))) {
522  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
523  "not present, cannot convert pixel formats.\n");
524  return AVERROR(EINVAL);
525  }
526 
527  snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
528  scaler_count++);
529 
530  if ((ret = avfilter_graph_create_filter(&convert, filter,
531  inst_name, graph->scale_sws_opts, NULL,
532  graph)) < 0)
533  return ret;
534  break;
535  case AVMEDIA_TYPE_AUDIO:
536  if (!(filter = avfilter_get_by_name("aresample"))) {
537  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
538  "not present, cannot convert audio formats.\n");
539  return AVERROR(EINVAL);
540  }
541 
542  snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
543  resampler_count++);
544  scale_args[0] = '\0';
545  if (graph->aresample_swr_opts)
546  snprintf(scale_args, sizeof(scale_args), "%s",
547  graph->aresample_swr_opts);
548  if ((ret = avfilter_graph_create_filter(&convert, filter,
549  inst_name, graph->aresample_swr_opts,
550  NULL, graph)) < 0)
551  return ret;
552  break;
553  default:
554  return AVERROR(EINVAL);
555  }
556 
557  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
558  return ret;
559 
560  if ((ret = filter_query_formats(convert)) < 0)
561  return ret;
562 
563  inlink = convert->inputs[0];
564  outlink = convert->outputs[0];
565  av_assert0( inlink-> in_formats->refcount > 0);
566  av_assert0( inlink->out_formats->refcount > 0);
567  av_assert0(outlink-> in_formats->refcount > 0);
568  av_assert0(outlink->out_formats->refcount > 0);
569  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
570  av_assert0( inlink-> in_samplerates->refcount > 0);
571  av_assert0( inlink->out_samplerates->refcount > 0);
572  av_assert0(outlink-> in_samplerates->refcount > 0);
573  av_assert0(outlink->out_samplerates->refcount > 0);
574  av_assert0( inlink-> in_channel_layouts->refcount > 0);
575  av_assert0( inlink->out_channel_layouts->refcount > 0);
576  av_assert0(outlink-> in_channel_layouts->refcount > 0);
577  av_assert0(outlink->out_channel_layouts->refcount > 0);
578  }
579  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
580  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
581  ret = AVERROR(ENOSYS);
582  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
584  inlink->out_samplerates) ||
586  inlink->out_channel_layouts)))
587  ret = AVERROR(ENOSYS);
588  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
590  outlink->out_samplerates) ||
592  outlink->out_channel_layouts)))
593  ret = AVERROR(ENOSYS);
594 
595  if (ret < 0) {
596  av_log(log_ctx, AV_LOG_ERROR,
597  "Impossible to convert between the formats supported by the filter "
598  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
599  return ret;
600  }
601  }
602  }
603  }
604 
605  av_log(graph, AV_LOG_DEBUG, "query_formats: "
606  "%d queried, %d merged, %d already done, %d delayed\n",
607  count_queried, count_merged, count_already_merged, count_delayed);
608  if (count_delayed) {
609  AVBPrint bp;
610 
611  /* if count_queried > 0, one filter at least did set its formats,
612  that will give additional information to its neighbour;
613  if count_merged > 0, one pair of formats lists at least was merged,
614  that will give additional information to all connected filters;
615  in both cases, progress was made and a new round must be done */
616  if (count_queried || count_merged)
617  return AVERROR(EAGAIN);
619  for (i = 0; i < graph->nb_filters; i++)
620  if (!formats_declared(graph->filters[i]))
621  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
622  graph->filters[i]->name);
623  av_log(graph, AV_LOG_ERROR,
624  "The following filters could not choose their formats: %s\n"
625  "Consider inserting the (a)format filter near their input or "
626  "output.\n", bp.str);
627  return AVERROR(EIO);
628  }
629  return 0;
630 }
631 
632 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
633 {
634  int score = 0;
635 
636  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
637  score ++;
638 
639  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
640  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
641  }else
642  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
643 
646  score += 20;
647 
650  score += 2;
651 
652  return score;
653 }
654 
656  enum AVSampleFormat src_fmt)
657 {
658  int score1, score2;
659 
660  score1 = get_fmt_score(dst_fmt1, src_fmt);
661  score2 = get_fmt_score(dst_fmt2, src_fmt);
662 
663  return score1 < score2 ? dst_fmt1 : dst_fmt2;
664 }
665 
667 {
668  if (!link || !link->in_formats)
669  return 0;
670 
671  if (link->type == AVMEDIA_TYPE_VIDEO) {
672  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
673  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
674  enum AVPixelFormat best= AV_PIX_FMT_NONE;
675  int i;
676  for (i=0; i<link->in_formats->nb_formats; i++) {
677  enum AVPixelFormat p = link->in_formats->formats[i];
678  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
679  }
680  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
682  av_get_pix_fmt_name(ref->format), has_alpha);
683  link->in_formats->formats[0] = best;
684  }
685  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
686  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
688  int i;
689  for (i=0; i<link->in_formats->nb_formats; i++) {
690  enum AVSampleFormat p = link->in_formats->formats[i];
691  best = find_best_sample_fmt_of_2(best, p, ref->format);
692  }
693  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
696  link->in_formats->formats[0] = best;
697  }
698  }
699 
700  link->in_formats->nb_formats = 1;
701  link->format = link->in_formats->formats[0];
702 
703  if (link->type == AVMEDIA_TYPE_AUDIO) {
704  if (!link->in_samplerates->nb_formats) {
705  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
706  " the link between filters %s and %s.\n", link->src->name,
707  link->dst->name);
708  return AVERROR(EINVAL);
709  }
710  link->in_samplerates->nb_formats = 1;
711  link->sample_rate = link->in_samplerates->formats[0];
712 
713  if (link->in_channel_layouts->all_layouts) {
714  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
715  " the link between filters %s and %s.\n", link->src->name,
716  link->dst->name);
717  if (!link->in_channel_layouts->all_counts)
718  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
719  "supported, try specifying a channel layout using "
720  "'aformat=channel_layouts=something'.\n");
721  return AVERROR(EINVAL);
722  }
725  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
726  link->channel_layout = 0;
727  else
729  }
730 
737 
738  return 0;
739 }
740 
741 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
742 do { \
743  for (i = 0; i < filter->nb_inputs; i++) { \
744  AVFilterLink *link = filter->inputs[i]; \
745  fmt_type fmt; \
746  \
747  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
748  continue; \
749  fmt = link->out_ ## list->var[0]; \
750  \
751  for (j = 0; j < filter->nb_outputs; j++) { \
752  AVFilterLink *out_link = filter->outputs[j]; \
753  list_type *fmts; \
754  \
755  if (link->type != out_link->type || \
756  out_link->in_ ## list->nb == 1) \
757  continue; \
758  fmts = out_link->in_ ## list; \
759  \
760  if (!out_link->in_ ## list->nb) { \
761  if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
762  return ret; \
763  ret = 1; \
764  break; \
765  } \
766  \
767  for (k = 0; k < out_link->in_ ## list->nb; k++) \
768  if (fmts->var[k] == fmt) { \
769  fmts->var[0] = fmt; \
770  fmts->nb = 1; \
771  ret = 1; \
772  break; \
773  } \
774  } \
775  } \
776 } while (0)
777 
779 {
780  int i, j, k, ret = 0;
781 
783  nb_formats, ff_add_format, ff_formats_unref);
784  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
785  nb_formats, ff_add_format, ff_formats_unref);
786 
787  /* reduce channel layouts */
788  for (i = 0; i < filter->nb_inputs; i++) {
789  AVFilterLink *inlink = filter->inputs[i];
790  uint64_t fmt;
791 
792  if (!inlink->out_channel_layouts ||
794  continue;
795  fmt = inlink->out_channel_layouts->channel_layouts[0];
796 
797  for (j = 0; j < filter->nb_outputs; j++) {
798  AVFilterLink *outlink = filter->outputs[j];
800 
801  fmts = outlink->in_channel_layouts;
802  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
803  continue;
804 
805  if (fmts->all_layouts &&
806  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
807  /* Turn the infinite list into a singleton */
808  fmts->all_layouts = fmts->all_counts = 0;
809  if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
810  ret = 1;
811  break;
812  }
813 
814  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
815  if (fmts->channel_layouts[k] == fmt) {
816  fmts->channel_layouts[0] = fmt;
817  fmts->nb_channel_layouts = 1;
818  ret = 1;
819  break;
820  }
821  }
822  }
823  }
824 
825  return ret;
826 }
827 
828 static int reduce_formats(AVFilterGraph *graph)
829 {
830  int i, reduced, ret;
831 
832  do {
833  reduced = 0;
834 
835  for (i = 0; i < graph->nb_filters; i++) {
836  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
837  return ret;
838  reduced |= ret;
839  }
840  } while (reduced);
841 
842  return 0;
843 }
844 
846 {
847  AVFilterLink *link = NULL;
848  int sample_rate;
849  int i, j;
850 
851  for (i = 0; i < filter->nb_inputs; i++) {
852  link = filter->inputs[i];
853 
854  if (link->type == AVMEDIA_TYPE_AUDIO &&
855  link->out_samplerates->nb_formats== 1)
856  break;
857  }
858  if (i == filter->nb_inputs)
859  return;
860 
861  sample_rate = link->out_samplerates->formats[0];
862 
863  for (i = 0; i < filter->nb_outputs; i++) {
864  AVFilterLink *outlink = filter->outputs[i];
865  int best_idx, best_diff = INT_MAX;
866 
867  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
868  outlink->in_samplerates->nb_formats < 2)
869  continue;
870 
871  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
872  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
873 
874  if (diff < best_diff) {
875  best_diff = diff;
876  best_idx = j;
877  }
878  }
879  FFSWAP(int, outlink->in_samplerates->formats[0],
880  outlink->in_samplerates->formats[best_idx]);
881  }
882 }
883 
884 static void swap_samplerates(AVFilterGraph *graph)
885 {
886  int i;
887 
888  for (i = 0; i < graph->nb_filters; i++)
890 }
891 
892 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
893 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
894 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
895 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
896 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
897 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
898 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
899 
900 /* allowable substitutions for channel pairs when comparing layouts,
901  * ordered by priority for both values */
902 static const uint64_t ch_subst[][2] = {
924 };
925 
927 {
928  AVFilterLink *link = NULL;
929  int i, j, k;
930 
931  for (i = 0; i < filter->nb_inputs; i++) {
932  link = filter->inputs[i];
933 
934  if (link->type == AVMEDIA_TYPE_AUDIO &&
936  break;
937  }
938  if (i == filter->nb_inputs)
939  return;
940 
941  for (i = 0; i < filter->nb_outputs; i++) {
942  AVFilterLink *outlink = filter->outputs[i];
943  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
944 
945  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
947  continue;
948 
949  for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
950  uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
951  uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
952  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
953  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
954  int count_diff = out_channels - in_channels;
955  int matched_channels, extra_channels;
956  int score = 100000;
957 
958  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
959  /* Compute score in case the input or output layout encodes
960  a channel count; in this case the score is not altered by
961  the computation afterwards, as in_chlayout and
962  out_chlayout have both been set to 0 */
963  if (FF_LAYOUT2COUNT(in_chlayout))
964  in_channels = FF_LAYOUT2COUNT(in_chlayout);
965  if (FF_LAYOUT2COUNT(out_chlayout))
966  out_channels = FF_LAYOUT2COUNT(out_chlayout);
967  score -= 10000 + FFABS(out_channels - in_channels) +
968  (in_channels > out_channels ? 10000 : 0);
969  in_chlayout = out_chlayout = 0;
970  /* Let the remaining computation run, even if the score
971  value is not altered */
972  }
973 
974  /* channel substitution */
975  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
976  uint64_t cmp0 = ch_subst[k][0];
977  uint64_t cmp1 = ch_subst[k][1];
978  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
979  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
980  in_chlayout &= ~cmp0;
981  out_chlayout &= ~cmp1;
982  /* add score for channel match, minus a deduction for
983  having to do the substitution */
984  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
985  }
986  }
987 
988  /* no penalty for LFE channel mismatch */
989  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
990  (out_chlayout & AV_CH_LOW_FREQUENCY))
991  score += 10;
992  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
993  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
994 
995  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
996  out_chlayout);
997  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
998  (~in_chlayout));
999  score += 10 * matched_channels - 5 * extra_channels;
1000 
1001  if (score > best_score ||
1002  (count_diff < best_count_diff && score == best_score)) {
1003  best_score = score;
1004  best_idx = j;
1005  best_count_diff = count_diff;
1006  }
1007  }
1008  av_assert0(best_idx >= 0);
1009  FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1010  outlink->in_channel_layouts->channel_layouts[best_idx]);
1011  }
1012 
1013 }
1014 
1016 {
1017  int i;
1018 
1019  for (i = 0; i < graph->nb_filters; i++)
1021 }
1022 
1024 {
1025  AVFilterLink *link = NULL;
1026  int format, bps;
1027  int i, j;
1028 
1029  for (i = 0; i < filter->nb_inputs; i++) {
1030  link = filter->inputs[i];
1031 
1032  if (link->type == AVMEDIA_TYPE_AUDIO &&
1033  link->out_formats->nb_formats == 1)
1034  break;
1035  }
1036  if (i == filter->nb_inputs)
1037  return;
1038 
1039  format = link->out_formats->formats[0];
1040  bps = av_get_bytes_per_sample(format);
1041 
1042  for (i = 0; i < filter->nb_outputs; i++) {
1043  AVFilterLink *outlink = filter->outputs[i];
1044  int best_idx = -1, best_score = INT_MIN;
1045 
1046  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1047  outlink->in_formats->nb_formats < 2)
1048  continue;
1049 
1050  for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1051  int out_format = outlink->in_formats->formats[j];
1052  int out_bps = av_get_bytes_per_sample(out_format);
1053  int score;
1054 
1055  if (av_get_packed_sample_fmt(out_format) == format ||
1056  av_get_planar_sample_fmt(out_format) == format) {
1057  best_idx = j;
1058  break;
1059  }
1060 
1061  /* for s32 and float prefer double to prevent loss of information */
1062  if (bps == 4 && out_bps == 8) {
1063  best_idx = j;
1064  break;
1065  }
1066 
1067  /* prefer closest higher or equal bps */
1068  score = -abs(out_bps - bps);
1069  if (out_bps >= bps)
1070  score += INT_MAX/2;
1071 
1072  if (score > best_score) {
1073  best_score = score;
1074  best_idx = j;
1075  }
1076  }
1077  av_assert0(best_idx >= 0);
1078  FFSWAP(int, outlink->in_formats->formats[0],
1079  outlink->in_formats->formats[best_idx]);
1080  }
1081 }
1082 
1083 static void swap_sample_fmts(AVFilterGraph *graph)
1084 {
1085  int i;
1086 
1087  for (i = 0; i < graph->nb_filters; i++)
1089 
1090 }
1091 
1092 static int pick_formats(AVFilterGraph *graph)
1093 {
1094  int i, j, ret;
1095  int change;
1096 
1097  do{
1098  change = 0;
1099  for (i = 0; i < graph->nb_filters; i++) {
1100  AVFilterContext *filter = graph->filters[i];
1101  if (filter->nb_inputs){
1102  for (j = 0; j < filter->nb_inputs; j++){
1103  if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1104  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1105  return ret;
1106  change = 1;
1107  }
1108  }
1109  }
1110  if (filter->nb_outputs){
1111  for (j = 0; j < filter->nb_outputs; j++){
1112  if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1113  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1114  return ret;
1115  change = 1;
1116  }
1117  }
1118  }
1119  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1120  for (j = 0; j < filter->nb_outputs; j++) {
1121  if(filter->outputs[j]->format<0) {
1122  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1123  return ret;
1124  change = 1;
1125  }
1126  }
1127  }
1128  }
1129  }while(change);
1130 
1131  for (i = 0; i < graph->nb_filters; i++) {
1132  AVFilterContext *filter = graph->filters[i];
1133 
1134  for (j = 0; j < filter->nb_inputs; j++)
1135  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1136  return ret;
1137  for (j = 0; j < filter->nb_outputs; j++)
1138  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1139  return ret;
1140  }
1141  return 0;
1142 }
1143 
1144 /**
1145  * Configure the formats of all the links in the graph.
1146  */
1147 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1148 {
1149  int ret;
1150 
1151  /* find supported formats from sub-filters, and merge along links */
1152  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1153  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1154  if (ret < 0)
1155  return ret;
1156 
1157  /* Once everything is merged, it's possible that we'll still have
1158  * multiple valid media format choices. We try to minimize the amount
1159  * of format conversion inside filters */
1160  if ((ret = reduce_formats(graph)) < 0)
1161  return ret;
1162 
1163  /* for audio filters, ensure the best format, sample rate and channel layout
1164  * is selected */
1165  swap_sample_fmts(graph);
1166  swap_samplerates(graph);
1167  swap_channel_layouts(graph);
1168 
1169  if ((ret = pick_formats(graph)) < 0)
1170  return ret;
1171 
1172  return 0;
1173 }
1174 
1176  AVClass *log_ctx)
1177 {
1178  unsigned i, j;
1179  int sink_links_count = 0, n = 0;
1180  AVFilterContext *f;
1181  AVFilterLink **sinks;
1182 
1183  for (i = 0; i < graph->nb_filters; i++) {
1184  f = graph->filters[i];
1185  for (j = 0; j < f->nb_inputs; j++) {
1186  f->inputs[j]->graph = graph;
1187  f->inputs[j]->age_index = -1;
1188  }
1189  for (j = 0; j < f->nb_outputs; j++) {
1190  f->outputs[j]->graph = graph;
1191  f->outputs[j]->age_index= -1;
1192  }
1193  if (!f->nb_outputs) {
1194  if (f->nb_inputs > INT_MAX - sink_links_count)
1195  return AVERROR(EINVAL);
1196  sink_links_count += f->nb_inputs;
1197  }
1198  }
1199  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1200  if (!sinks)
1201  return AVERROR(ENOMEM);
1202  for (i = 0; i < graph->nb_filters; i++) {
1203  f = graph->filters[i];
1204  if (!f->nb_outputs) {
1205  for (j = 0; j < f->nb_inputs; j++) {
1206  sinks[n] = f->inputs[j];
1207  f->inputs[j]->age_index = n++;
1208  }
1209  }
1210  }
1211  av_assert0(n == sink_links_count);
1212  graph->sink_links = sinks;
1213  graph->sink_links_count = sink_links_count;
1214  return 0;
1215 }
1216 
1217 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1218 {
1219  AVFilterContext *f;
1220  int i, j, ret;
1221  int fifo_count = 0;
1222 
1223  for (i = 0; i < graph->nb_filters; i++) {
1224  f = graph->filters[i];
1225 
1226  for (j = 0; j < f->nb_inputs; j++) {
1227  AVFilterLink *link = f->inputs[j];
1228  AVFilterContext *fifo_ctx;
1229  AVFilter *fifo;
1230  char name[32];
1231 
1232  if (!link->dstpad->needs_fifo)
1233  continue;
1234 
1235  fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1236  avfilter_get_by_name("fifo") :
1237  avfilter_get_by_name("afifo");
1238 
1239  snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
1240 
1241  ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1242  NULL, graph);
1243  if (ret < 0)
1244  return ret;
1245 
1246  ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1247  if (ret < 0)
1248  return ret;
1249  }
1250  }
1251 
1252  return 0;
1253 }
1254 
1255 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1256 {
1257  int ret;
1258 
1259  if ((ret = graph_check_validity(graphctx, log_ctx)))
1260  return ret;
1261  if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1262  return ret;
1263  if ((ret = graph_config_formats(graphctx, log_ctx)))
1264  return ret;
1265  if ((ret = graph_config_links(graphctx, log_ctx)))
1266  return ret;
1267  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1268  return ret;
1269 
1270  return 0;
1271 }
1272 
1273 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1274 {
1275  int i, r = AVERROR(ENOSYS);
1276 
1277  if (!graph)
1278  return r;
1279 
1280  if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1281  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1282  if (r != AVERROR(ENOSYS))
1283  return r;
1284  }
1285 
1286  if (res_len && res)
1287  res[0] = 0;
1288 
1289  for (i = 0; i < graph->nb_filters; i++) {
1290  AVFilterContext *filter = graph->filters[i];
1291  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1292  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1293  if (r != AVERROR(ENOSYS)) {
1294  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1295  return r;
1296  }
1297  }
1298  }
1299 
1300  return r;
1301 }
1302 
1303 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1304 {
1305  int i;
1306 
1307  if(!graph)
1308  return 0;
1309 
1310  for (i = 0; i < graph->nb_filters; i++) {
1311  AVFilterContext *filter = graph->filters[i];
1312  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1313  AVFilterCommand **queue = &filter->command_queue, *next;
1314  while (*queue && (*queue)->time <= ts)
1315  queue = &(*queue)->next;
1316  next = *queue;
1317  *queue = av_mallocz(sizeof(AVFilterCommand));
1318  (*queue)->command = av_strdup(command);
1319  (*queue)->arg = av_strdup(arg);
1320  (*queue)->time = ts;
1321  (*queue)->flags = flags;
1322  (*queue)->next = next;
1323  if(flags & AVFILTER_CMD_FLAG_ONE)
1324  return 0;
1325  }
1326  }
1327 
1328  return 0;
1329 }
1330 
1331 static void heap_bubble_up(AVFilterGraph *graph,
1332  AVFilterLink *link, int index)
1333 {
1334  AVFilterLink **links = graph->sink_links;
1335 
1336  av_assert0(index >= 0);
1337 
1338  while (index) {
1339  int parent = (index - 1) >> 1;
1340  if (links[parent]->current_pts_us >= link->current_pts_us)
1341  break;
1342  links[index] = links[parent];
1343  links[index]->age_index = index;
1344  index = parent;
1345  }
1346  links[index] = link;
1347  link->age_index = index;
1348 }
1349 
1350 static void heap_bubble_down(AVFilterGraph *graph,
1351  AVFilterLink *link, int index)
1352 {
1353  AVFilterLink **links = graph->sink_links;
1354 
1355  av_assert0(index >= 0);
1356 
1357  while (1) {
1358  int child = 2 * index + 1;
1359  if (child >= graph->sink_links_count)
1360  break;
1361  if (child + 1 < graph->sink_links_count &&
1362  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1363  child++;
1364  if (link->current_pts_us < links[child]->current_pts_us)
1365  break;
1366  links[index] = links[child];
1367  links[index]->age_index = index;
1368  index = child;
1369  }
1370  links[index] = link;
1371  link->age_index = index;
1372 }
1373 
1375 {
1376  heap_bubble_up (graph, link, link->age_index);
1377  heap_bubble_down(graph, link, link->age_index);
1378 }
1379 
1380 
1382 {
1383  AVFilterLink *oldest = graph->sink_links[0];
1384  int r;
1385 
1386  while (graph->sink_links_count) {
1387  oldest = graph->sink_links[0];
1388  r = ff_request_frame(oldest);
1389  if (r != AVERROR_EOF)
1390  break;
1391  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1392  oldest->dst ? oldest->dst->name : "unknown",
1393  oldest->dstpad ? oldest->dstpad->name : "unknown");
1394  /* EOF: remove the link from the heap */
1395  if (oldest->age_index < --graph->sink_links_count)
1396  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1397  oldest->age_index);
1398  oldest->age_index = -1;
1399  }
1400  if (!graph->sink_links_count)
1401  return AVERROR_EOF;
1402  av_assert1(oldest->age_index >= 0);
1403  while (oldest->frame_wanted_out) {
1404  r = ff_filter_graph_run_once(graph);
1405  if (r < 0)
1406  return r;
1407  }
1408  return 0;
1409 }
1410 
1412 {
1413  unsigned i, j;
1414  AVFilterContext *f;
1415 
1416  /* TODO: replace scanning the graph with a priority list */
1417  for (i = 0; i < graph->nb_filters; i++) {
1418  f = graph->filters[i];
1419  for (j = 0; j < f->nb_outputs; j++)
1420  if (f->outputs[j]->frame_wanted_in)
1421  return f->outputs[j];
1422  }
1423  for (i = 0; i < graph->nb_filters; i++) {
1424  f = graph->filters[i];
1425  for (j = 0; j < f->nb_outputs; j++)
1426  if (f->outputs[j]->frame_wanted_out)
1427  return f->outputs[j];
1428  }
1429  return NULL;
1430 }
1431 
1433 {
1434  AVFilterLink *link;
1435  int ret;
1436 
1437  link = graph_run_once_find_filter(graph);
1438  if (!link) {
1439  av_log(NULL, AV_LOG_WARNING, "Useless run of a filter graph\n");
1440  return AVERROR(EAGAIN);
1441  }
1442  ret = ff_request_frame_to_filter(link);
1443  if (ret == AVERROR_EOF)
1444  /* local EOF will be forwarded through request_frame() /
1445  set_status() until it reaches the sink */
1446  ret = 0;
1447  return ret < 0 ? ret : 1;
1448 }
AVFilterContext ** filters
Definition: avfilter.h:788
void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
Enable or disable automatic format conversion inside the graph.
#define NULL
Definition: coverity.c:32
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:549
const char * s
Definition: avisynth_c.h:768
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
int sink_links_count
Definition: avfilter.h:851
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:647
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2332
int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
Queue a command for one or more filter instances.
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:806
static void swap_samplerates(AVFilterGraph *graph)
AVOption.
Definition: opt.h:246
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:145
static void swap_sample_fmts(AVFilterGraph *graph)
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:744
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
const char * fmt
Definition: avisynth_c.h:769
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:76
#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:972
static int reduce_formats(AVFilterGraph *graph)
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1293
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:113
static enum AVSampleFormat formats[]
Definition: avresample.c:163
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:64
static int reduce_formats_on_filter(AVFilterContext *filter)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
int(* query_formats)(AVFilterContext *)
Query formats supported by the filter on its inputs and outputs.
Definition: avfilter.h:267
static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:791
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:260
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:302
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:324
#define OFFSET(x)
Definition: avfiltergraph.c:40
const char * name
Pad name.
Definition: internal.h:59
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:315
char * name
name of this filter instance
Definition: avfilter.h:312
#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:839
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:318
AVOptions.
#define FF_LAYOUT2COUNT(l)
Decode a channel count encoded as a channel layout.
Definition: formats.h:108
AVS_FilterInfo AVS_Value child
Definition: avisynth_c.h:731
struct AVFilterFormats *** refs
references to this list
Definition: formats.h:69
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:80
#define AV_CH_LOW_FREQUENCY
int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx)
Create and add a filter instance into an existing graph.
static int pick_formats(AVFilterGraph *graph)
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:813
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:237
static int flags
Definition: log.c:57
#define AVERROR_EOF
End of file.
Definition: error.h:55
AVFilterContext * avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
Get a filter instance identified by instance name from graph.
enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt)
Get the planar alternative form of the given sample format.
Definition: samplefmt.c:84
signed 32 bits
Definition: samplefmt.h:62
#define av_log(a,...)
AVFilterFormats * ff_all_formats(enum AVMediaType type)
Return a list of all formats supported by FFmpeg for the given media type.
Definition: formats.c:350
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
A filter pad used for either input or output.
Definition: internal.h:53
unsigned refcount
number of references to this list
Definition: formats.h:68
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:314
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
#define FLAGS
Definition: avfiltergraph.c:41
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
const AVClass * av_class
Definition: avfilter.h:787
unsigned nb_outputs
number of output pads
Definition: avfilter.h:320
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
const char * r
Definition: vf_curves.c:111
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
uint64_t * channel_layouts
list of channel layouts
Definition: formats.h:86
const char * arg
Definition: jacosubdec.c:66
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
static void heap_bubble_down(AVFilterGraph *graph, AVFilterLink *link, int index)
#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format)
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:299
AVFilterLink ** sink_links
Private fields.
Definition: avfilter.h:850
#define CH_DIRECT_PAIR
#define fail()
Definition: checkasm.h:84
char all_counts
accept any channel layout or count
Definition: formats.h:89
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:519
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:316
#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:42
#define CH_CENTER_PAIR
static const AVOption filtergraph_options[]
Definition: avfiltergraph.c:42
#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:602
#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:915
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:200
void ff_graph_thread_free(AVFilterGraph *graph)
Definition: avfiltergraph.c:64
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:597
sample_rate
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static void heap_bubble_up(AVFilterGraph *graph, AVFilterLink *link, int index)
static int formats_declared(AVFilterContext *f)
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:818
int ff_request_frame_to_filter(AVFilterLink *link)
Definition: avfilter.c:380
char all_layouts
accept any known channel layout
Definition: formats.h:88
AVFilterChannelLayouts * ff_merge_channel_layouts(AVFilterChannelLayouts *a, AVFilterChannelLayouts *b)
Return a channel layouts/samplerates list which contains the intersection of the layouts/samplerates ...
Definition: formats.c:166
AVFilterFormats * ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b, enum AVMediaType type)
Return a format list which contains the intersection of the formats of a and b.
Definition: formats.c:92
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_drawtext.c:767
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:492
GLint GLenum type
Definition: opengl_enc.c:105
static const char * format
Definition: movenc.c:47
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:118
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
int index
Definition: gxfenc.c:89
#define AVFILTER_CMD_FLAG_FAST
Only execute command when its fast (like a video out that supports contrast adjustment in hw) ...
Definition: avfilter.h:603
#define CH_BACK_PAIR
AVMediaType
Definition: avutil.h:193
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:789
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:319
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
static const int8_t filt[NUMTAPS]
Definition: af_earwax.c:39
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:79
#define AV_CH_BACK_CENTER
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
Perform one round of query_formats() and merging formats lists on the filter graph.
static AVFilterLink * graph_run_once_find_filter(AVFilterGraph *graph)
int ff_graph_thread_init(AVFilterGraph *graph)
Definition: avfiltergraph.c:68
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:349
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
Send a command to one or more filter instances.
unsigned bps
Definition: movenc.c:1413
enum AVPixelFormat av_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Compute what kind of losses will occur when converting from one specific pixel format to another...
Definition: pixdesc.c:2614
static void swap_samplerates_on_filter(AVFilterContext *filter)
char * aresample_swr_opts
swr options to use for the auto-inserted aresample filters, Access ONLY through AVOptions ...
Definition: avfilter.h:841
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
Remove a filter from a graph;.
Definition: avfiltergraph.c:94
static av_always_inline int diff(const uint32_t a, const uint32_t b)
avfilter_execute_func * thread_execute
Definition: internal.h:149
AVFilterContext * avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name)
Create a new filter instance in a filter graph.
static const struct PPFilter filters[]
Definition: postprocess.c:137
unsigned refcount
number of references to this list
Definition: formats.h:91
A list of supported formats for one end of a filter link.
Definition: formats.h:64
static const AVClass filtergraph_class
Definition: avfiltergraph.c:55
An instance of a filter.
Definition: avfilter.h:307
#define av_freep(p)
#define CH_SIDE_PAIR
double time
time expressed in seconds
Definition: internal.h:38
int needs_fifo
The filter expects a fifo to be inserted on its input link, typically because it has a delay...
Definition: internal.h:136
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:369
#define FFSWAP(type, a, b)
Definition: common.h:99
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2248
static int filter_query_formats(AVFilterContext *ctx)
AVFilterFormats * ff_merge_samplerates(AVFilterFormats *a, AVFilterFormats *b)
Definition: formats.c:139
internal API functions
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:310
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
unsigned disable_auto_convert
Definition: avfilter.h:853
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