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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  /* couldn't merge format lists. auto-insert conversion filter */
511  switch (link->type) {
512  case AVMEDIA_TYPE_VIDEO:
513  if (!(filter = avfilter_get_by_name("scale"))) {
514  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
515  "not present, cannot convert pixel formats.\n");
516  return AVERROR(EINVAL);
517  }
518 
519  snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
520  scaler_count++);
521 
522  if ((ret = avfilter_graph_create_filter(&convert, filter,
523  inst_name, graph->scale_sws_opts, NULL,
524  graph)) < 0)
525  return ret;
526  break;
527  case AVMEDIA_TYPE_AUDIO:
528  if (!(filter = avfilter_get_by_name("aresample"))) {
529  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
530  "not present, cannot convert audio formats.\n");
531  return AVERROR(EINVAL);
532  }
533 
534  snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
535  resampler_count++);
536  scale_args[0] = '\0';
537  if (graph->aresample_swr_opts)
538  snprintf(scale_args, sizeof(scale_args), "%s",
539  graph->aresample_swr_opts);
540  if ((ret = avfilter_graph_create_filter(&convert, filter,
541  inst_name, graph->aresample_swr_opts,
542  NULL, graph)) < 0)
543  return ret;
544  break;
545  default:
546  return AVERROR(EINVAL);
547  }
548 
549  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
550  return ret;
551 
552  if ((ret = filter_query_formats(convert)) < 0)
553  return ret;
554 
555  inlink = convert->inputs[0];
556  outlink = convert->outputs[0];
557  av_assert0( inlink-> in_formats->refcount > 0);
558  av_assert0( inlink->out_formats->refcount > 0);
559  av_assert0(outlink-> in_formats->refcount > 0);
560  av_assert0(outlink->out_formats->refcount > 0);
561  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
562  av_assert0( inlink-> in_samplerates->refcount > 0);
563  av_assert0( inlink->out_samplerates->refcount > 0);
564  av_assert0(outlink-> in_samplerates->refcount > 0);
565  av_assert0(outlink->out_samplerates->refcount > 0);
566  av_assert0( inlink-> in_channel_layouts->refcount > 0);
567  av_assert0( inlink->out_channel_layouts->refcount > 0);
568  av_assert0(outlink-> in_channel_layouts->refcount > 0);
569  av_assert0(outlink->out_channel_layouts->refcount > 0);
570  }
571  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
572  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
573  ret = AVERROR(ENOSYS);
574  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
576  inlink->out_samplerates) ||
578  inlink->out_channel_layouts)))
579  ret = AVERROR(ENOSYS);
580  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
582  outlink->out_samplerates) ||
584  outlink->out_channel_layouts)))
585  ret = AVERROR(ENOSYS);
586 
587  if (ret < 0) {
588  av_log(log_ctx, AV_LOG_ERROR,
589  "Impossible to convert between the formats supported by the filter "
590  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
591  return ret;
592  }
593  }
594  }
595  }
596 
597  av_log(graph, AV_LOG_DEBUG, "query_formats: "
598  "%d queried, %d merged, %d already done, %d delayed\n",
599  count_queried, count_merged, count_already_merged, count_delayed);
600  if (count_delayed) {
601  AVBPrint bp;
602 
603  /* if count_queried > 0, one filter at least did set its formats,
604  that will give additional information to its neighbour;
605  if count_merged > 0, one pair of formats lists at least was merged,
606  that will give additional information to all connected filters;
607  in both cases, progress was made and a new round must be done */
608  if (count_queried || count_merged)
609  return AVERROR(EAGAIN);
611  for (i = 0; i < graph->nb_filters; i++)
612  if (!formats_declared(graph->filters[i]))
613  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
614  graph->filters[i]->name);
615  av_log(graph, AV_LOG_ERROR,
616  "The following filters could not choose their formats: %s\n"
617  "Consider inserting the (a)format filter near their input or "
618  "output.\n", bp.str);
619  return AVERROR(EIO);
620  }
621  return 0;
622 }
623 
624 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
625 {
626  int score = 0;
627 
628  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
629  score ++;
630 
631  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
632  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
633  }else
634  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
635 
638  score += 20;
639 
642  score += 2;
643 
644  return score;
645 }
646 
648  enum AVSampleFormat src_fmt)
649 {
650  int score1, score2;
651 
652  score1 = get_fmt_score(dst_fmt1, src_fmt);
653  score2 = get_fmt_score(dst_fmt2, src_fmt);
654 
655  return score1 < score2 ? dst_fmt1 : dst_fmt2;
656 }
657 
659 {
660  if (!link || !link->in_formats)
661  return 0;
662 
663  if (link->type == AVMEDIA_TYPE_VIDEO) {
664  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
665  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
666  enum AVPixelFormat best= AV_PIX_FMT_NONE;
667  int i;
668  for (i=0; i<link->in_formats->nb_formats; i++) {
669  enum AVPixelFormat p = link->in_formats->formats[i];
670  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
671  }
672  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
674  av_get_pix_fmt_name(ref->format), has_alpha);
675  link->in_formats->formats[0] = best;
676  }
677  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
678  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
680  int i;
681  for (i=0; i<link->in_formats->nb_formats; i++) {
682  enum AVSampleFormat p = link->in_formats->formats[i];
683  best = find_best_sample_fmt_of_2(best, p, ref->format);
684  }
685  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
688  link->in_formats->formats[0] = best;
689  }
690  }
691 
692  link->in_formats->nb_formats = 1;
693  link->format = link->in_formats->formats[0];
694 
695  if (link->type == AVMEDIA_TYPE_AUDIO) {
696  if (!link->in_samplerates->nb_formats) {
697  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
698  " the link between filters %s and %s.\n", link->src->name,
699  link->dst->name);
700  return AVERROR(EINVAL);
701  }
702  link->in_samplerates->nb_formats = 1;
703  link->sample_rate = link->in_samplerates->formats[0];
704 
705  if (link->in_channel_layouts->all_layouts) {
706  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
707  " the link between filters %s and %s.\n", link->src->name,
708  link->dst->name);
709  if (!link->in_channel_layouts->all_counts)
710  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
711  "supported, try specifying a channel layout using "
712  "'aformat=channel_layouts=something'.\n");
713  return AVERROR(EINVAL);
714  }
717  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
718  link->channel_layout = 0;
719  else
721  }
722 
729 
730  return 0;
731 }
732 
733 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
734 do { \
735  for (i = 0; i < filter->nb_inputs; i++) { \
736  AVFilterLink *link = filter->inputs[i]; \
737  fmt_type fmt; \
738  \
739  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
740  continue; \
741  fmt = link->out_ ## list->var[0]; \
742  \
743  for (j = 0; j < filter->nb_outputs; j++) { \
744  AVFilterLink *out_link = filter->outputs[j]; \
745  list_type *fmts; \
746  \
747  if (link->type != out_link->type || \
748  out_link->in_ ## list->nb == 1) \
749  continue; \
750  fmts = out_link->in_ ## list; \
751  \
752  if (!out_link->in_ ## list->nb) { \
753  if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
754  return ret; \
755  ret = 1; \
756  break; \
757  } \
758  \
759  for (k = 0; k < out_link->in_ ## list->nb; k++) \
760  if (fmts->var[k] == fmt) { \
761  fmts->var[0] = fmt; \
762  fmts->nb = 1; \
763  ret = 1; \
764  break; \
765  } \
766  } \
767  } \
768 } while (0)
769 
771 {
772  int i, j, k, ret = 0;
773 
775  nb_formats, ff_add_format, ff_formats_unref);
776  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
777  nb_formats, ff_add_format, ff_formats_unref);
778 
779  /* reduce channel layouts */
780  for (i = 0; i < filter->nb_inputs; i++) {
781  AVFilterLink *inlink = filter->inputs[i];
782  uint64_t fmt;
783 
784  if (!inlink->out_channel_layouts ||
786  continue;
787  fmt = inlink->out_channel_layouts->channel_layouts[0];
788 
789  for (j = 0; j < filter->nb_outputs; j++) {
790  AVFilterLink *outlink = filter->outputs[j];
792 
793  fmts = outlink->in_channel_layouts;
794  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
795  continue;
796 
797  if (fmts->all_layouts &&
798  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
799  /* Turn the infinite list into a singleton */
800  fmts->all_layouts = fmts->all_counts = 0;
801  if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
802  ret = 1;
803  break;
804  }
805 
806  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
807  if (fmts->channel_layouts[k] == fmt) {
808  fmts->channel_layouts[0] = fmt;
809  fmts->nb_channel_layouts = 1;
810  ret = 1;
811  break;
812  }
813  }
814  }
815  }
816 
817  return ret;
818 }
819 
820 static int reduce_formats(AVFilterGraph *graph)
821 {
822  int i, reduced, ret;
823 
824  do {
825  reduced = 0;
826 
827  for (i = 0; i < graph->nb_filters; i++) {
828  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
829  return ret;
830  reduced |= ret;
831  }
832  } while (reduced);
833 
834  return 0;
835 }
836 
838 {
839  AVFilterLink *link = NULL;
840  int sample_rate;
841  int i, j;
842 
843  for (i = 0; i < filter->nb_inputs; i++) {
844  link = filter->inputs[i];
845 
846  if (link->type == AVMEDIA_TYPE_AUDIO &&
847  link->out_samplerates->nb_formats== 1)
848  break;
849  }
850  if (i == filter->nb_inputs)
851  return;
852 
853  sample_rate = link->out_samplerates->formats[0];
854 
855  for (i = 0; i < filter->nb_outputs; i++) {
856  AVFilterLink *outlink = filter->outputs[i];
857  int best_idx, best_diff = INT_MAX;
858 
859  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
860  outlink->in_samplerates->nb_formats < 2)
861  continue;
862 
863  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
864  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
865 
866  if (diff < best_diff) {
867  best_diff = diff;
868  best_idx = j;
869  }
870  }
871  FFSWAP(int, outlink->in_samplerates->formats[0],
872  outlink->in_samplerates->formats[best_idx]);
873  }
874 }
875 
876 static void swap_samplerates(AVFilterGraph *graph)
877 {
878  int i;
879 
880  for (i = 0; i < graph->nb_filters; i++)
882 }
883 
884 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
885 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
886 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
887 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
888 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
889 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
890 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
891 
892 /* allowable substitutions for channel pairs when comparing layouts,
893  * ordered by priority for both values */
894 static const uint64_t ch_subst[][2] = {
916 };
917 
919 {
920  AVFilterLink *link = NULL;
921  int i, j, k;
922 
923  for (i = 0; i < filter->nb_inputs; i++) {
924  link = filter->inputs[i];
925 
926  if (link->type == AVMEDIA_TYPE_AUDIO &&
928  break;
929  }
930  if (i == filter->nb_inputs)
931  return;
932 
933  for (i = 0; i < filter->nb_outputs; i++) {
934  AVFilterLink *outlink = filter->outputs[i];
935  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
936 
937  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
939  continue;
940 
941  for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
942  uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
943  uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
944  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
945  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
946  int count_diff = out_channels - in_channels;
947  int matched_channels, extra_channels;
948  int score = 100000;
949 
950  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
951  /* Compute score in case the input or output layout encodes
952  a channel count; in this case the score is not altered by
953  the computation afterwards, as in_chlayout and
954  out_chlayout have both been set to 0 */
955  if (FF_LAYOUT2COUNT(in_chlayout))
956  in_channels = FF_LAYOUT2COUNT(in_chlayout);
957  if (FF_LAYOUT2COUNT(out_chlayout))
958  out_channels = FF_LAYOUT2COUNT(out_chlayout);
959  score -= 10000 + FFABS(out_channels - in_channels) +
960  (in_channels > out_channels ? 10000 : 0);
961  in_chlayout = out_chlayout = 0;
962  /* Let the remaining computation run, even if the score
963  value is not altered */
964  }
965 
966  /* channel substitution */
967  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
968  uint64_t cmp0 = ch_subst[k][0];
969  uint64_t cmp1 = ch_subst[k][1];
970  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
971  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
972  in_chlayout &= ~cmp0;
973  out_chlayout &= ~cmp1;
974  /* add score for channel match, minus a deduction for
975  having to do the substitution */
976  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
977  }
978  }
979 
980  /* no penalty for LFE channel mismatch */
981  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
982  (out_chlayout & AV_CH_LOW_FREQUENCY))
983  score += 10;
984  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
985  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
986 
987  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
988  out_chlayout);
989  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
990  (~in_chlayout));
991  score += 10 * matched_channels - 5 * extra_channels;
992 
993  if (score > best_score ||
994  (count_diff < best_count_diff && score == best_score)) {
995  best_score = score;
996  best_idx = j;
997  best_count_diff = count_diff;
998  }
999  }
1000  av_assert0(best_idx >= 0);
1001  FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1002  outlink->in_channel_layouts->channel_layouts[best_idx]);
1003  }
1004 
1005 }
1006 
1008 {
1009  int i;
1010 
1011  for (i = 0; i < graph->nb_filters; i++)
1013 }
1014 
1016 {
1017  AVFilterLink *link = NULL;
1018  int format, bps;
1019  int i, j;
1020 
1021  for (i = 0; i < filter->nb_inputs; i++) {
1022  link = filter->inputs[i];
1023 
1024  if (link->type == AVMEDIA_TYPE_AUDIO &&
1025  link->out_formats->nb_formats == 1)
1026  break;
1027  }
1028  if (i == filter->nb_inputs)
1029  return;
1030 
1031  format = link->out_formats->formats[0];
1032  bps = av_get_bytes_per_sample(format);
1033 
1034  for (i = 0; i < filter->nb_outputs; i++) {
1035  AVFilterLink *outlink = filter->outputs[i];
1036  int best_idx = -1, best_score = INT_MIN;
1037 
1038  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1039  outlink->in_formats->nb_formats < 2)
1040  continue;
1041 
1042  for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1043  int out_format = outlink->in_formats->formats[j];
1044  int out_bps = av_get_bytes_per_sample(out_format);
1045  int score;
1046 
1047  if (av_get_packed_sample_fmt(out_format) == format ||
1048  av_get_planar_sample_fmt(out_format) == format) {
1049  best_idx = j;
1050  break;
1051  }
1052 
1053  /* for s32 and float prefer double to prevent loss of information */
1054  if (bps == 4 && out_bps == 8) {
1055  best_idx = j;
1056  break;
1057  }
1058 
1059  /* prefer closest higher or equal bps */
1060  score = -abs(out_bps - bps);
1061  if (out_bps >= bps)
1062  score += INT_MAX/2;
1063 
1064  if (score > best_score) {
1065  best_score = score;
1066  best_idx = j;
1067  }
1068  }
1069  av_assert0(best_idx >= 0);
1070  FFSWAP(int, outlink->in_formats->formats[0],
1071  outlink->in_formats->formats[best_idx]);
1072  }
1073 }
1074 
1075 static void swap_sample_fmts(AVFilterGraph *graph)
1076 {
1077  int i;
1078 
1079  for (i = 0; i < graph->nb_filters; i++)
1081 
1082 }
1083 
1084 static int pick_formats(AVFilterGraph *graph)
1085 {
1086  int i, j, ret;
1087  int change;
1088 
1089  do{
1090  change = 0;
1091  for (i = 0; i < graph->nb_filters; i++) {
1092  AVFilterContext *filter = graph->filters[i];
1093  if (filter->nb_inputs){
1094  for (j = 0; j < filter->nb_inputs; j++){
1095  if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1096  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1097  return ret;
1098  change = 1;
1099  }
1100  }
1101  }
1102  if (filter->nb_outputs){
1103  for (j = 0; j < filter->nb_outputs; j++){
1104  if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1105  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1106  return ret;
1107  change = 1;
1108  }
1109  }
1110  }
1111  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1112  for (j = 0; j < filter->nb_outputs; j++) {
1113  if(filter->outputs[j]->format<0) {
1114  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1115  return ret;
1116  change = 1;
1117  }
1118  }
1119  }
1120  }
1121  }while(change);
1122 
1123  for (i = 0; i < graph->nb_filters; i++) {
1124  AVFilterContext *filter = graph->filters[i];
1125 
1126  for (j = 0; j < filter->nb_inputs; j++)
1127  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1128  return ret;
1129  for (j = 0; j < filter->nb_outputs; j++)
1130  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1131  return ret;
1132  }
1133  return 0;
1134 }
1135 
1136 /**
1137  * Configure the formats of all the links in the graph.
1138  */
1139 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1140 {
1141  int ret;
1142 
1143  /* find supported formats from sub-filters, and merge along links */
1144  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1145  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1146  if (ret < 0)
1147  return ret;
1148 
1149  /* Once everything is merged, it's possible that we'll still have
1150  * multiple valid media format choices. We try to minimize the amount
1151  * of format conversion inside filters */
1152  if ((ret = reduce_formats(graph)) < 0)
1153  return ret;
1154 
1155  /* for audio filters, ensure the best format, sample rate and channel layout
1156  * is selected */
1157  swap_sample_fmts(graph);
1158  swap_samplerates(graph);
1159  swap_channel_layouts(graph);
1160 
1161  if ((ret = pick_formats(graph)) < 0)
1162  return ret;
1163 
1164  return 0;
1165 }
1166 
1168  AVClass *log_ctx)
1169 {
1170  unsigned i, j;
1171  int sink_links_count = 0, n = 0;
1172  AVFilterContext *f;
1173  AVFilterLink **sinks;
1174 
1175  for (i = 0; i < graph->nb_filters; i++) {
1176  f = graph->filters[i];
1177  for (j = 0; j < f->nb_inputs; j++) {
1178  f->inputs[j]->graph = graph;
1179  f->inputs[j]->age_index = -1;
1180  }
1181  for (j = 0; j < f->nb_outputs; j++) {
1182  f->outputs[j]->graph = graph;
1183  f->outputs[j]->age_index= -1;
1184  }
1185  if (!f->nb_outputs) {
1186  if (f->nb_inputs > INT_MAX - sink_links_count)
1187  return AVERROR(EINVAL);
1188  sink_links_count += f->nb_inputs;
1189  }
1190  }
1191  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1192  if (!sinks)
1193  return AVERROR(ENOMEM);
1194  for (i = 0; i < graph->nb_filters; i++) {
1195  f = graph->filters[i];
1196  if (!f->nb_outputs) {
1197  for (j = 0; j < f->nb_inputs; j++) {
1198  sinks[n] = f->inputs[j];
1199  f->inputs[j]->age_index = n++;
1200  }
1201  }
1202  }
1203  av_assert0(n == sink_links_count);
1204  graph->sink_links = sinks;
1205  graph->sink_links_count = sink_links_count;
1206  return 0;
1207 }
1208 
1209 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1210 {
1211  AVFilterContext *f;
1212  int i, j, ret;
1213  int fifo_count = 0;
1214 
1215  for (i = 0; i < graph->nb_filters; i++) {
1216  f = graph->filters[i];
1217 
1218  for (j = 0; j < f->nb_inputs; j++) {
1219  AVFilterLink *link = f->inputs[j];
1220  AVFilterContext *fifo_ctx;
1221  AVFilter *fifo;
1222  char name[32];
1223 
1224  if (!link->dstpad->needs_fifo)
1225  continue;
1226 
1227  fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1228  avfilter_get_by_name("fifo") :
1229  avfilter_get_by_name("afifo");
1230 
1231  snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
1232 
1233  ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1234  NULL, graph);
1235  if (ret < 0)
1236  return ret;
1237 
1238  ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1239  if (ret < 0)
1240  return ret;
1241  }
1242  }
1243 
1244  return 0;
1245 }
1246 
1247 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1248 {
1249  int ret;
1250 
1251  if ((ret = graph_check_validity(graphctx, log_ctx)))
1252  return ret;
1253  if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1254  return ret;
1255  if ((ret = graph_config_formats(graphctx, log_ctx)))
1256  return ret;
1257  if ((ret = graph_config_links(graphctx, log_ctx)))
1258  return ret;
1259  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1260  return ret;
1261 
1262  return 0;
1263 }
1264 
1265 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1266 {
1267  int i, r = AVERROR(ENOSYS);
1268 
1269  if (!graph)
1270  return r;
1271 
1272  if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1273  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1274  if (r != AVERROR(ENOSYS))
1275  return r;
1276  }
1277 
1278  if (res_len && res)
1279  res[0] = 0;
1280 
1281  for (i = 0; i < graph->nb_filters; i++) {
1282  AVFilterContext *filter = graph->filters[i];
1283  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1284  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1285  if (r != AVERROR(ENOSYS)) {
1286  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1287  return r;
1288  }
1289  }
1290  }
1291 
1292  return r;
1293 }
1294 
1295 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1296 {
1297  int i;
1298 
1299  if(!graph)
1300  return 0;
1301 
1302  for (i = 0; i < graph->nb_filters; i++) {
1303  AVFilterContext *filter = graph->filters[i];
1304  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1305  AVFilterCommand **queue = &filter->command_queue, *next;
1306  while (*queue && (*queue)->time <= ts)
1307  queue = &(*queue)->next;
1308  next = *queue;
1309  *queue = av_mallocz(sizeof(AVFilterCommand));
1310  (*queue)->command = av_strdup(command);
1311  (*queue)->arg = av_strdup(arg);
1312  (*queue)->time = ts;
1313  (*queue)->flags = flags;
1314  (*queue)->next = next;
1315  if(flags & AVFILTER_CMD_FLAG_ONE)
1316  return 0;
1317  }
1318  }
1319 
1320  return 0;
1321 }
1322 
1323 static void heap_bubble_up(AVFilterGraph *graph,
1324  AVFilterLink *link, int index)
1325 {
1326  AVFilterLink **links = graph->sink_links;
1327 
1328  av_assert0(index >= 0);
1329 
1330  while (index) {
1331  int parent = (index - 1) >> 1;
1332  if (links[parent]->current_pts_us >= link->current_pts_us)
1333  break;
1334  links[index] = links[parent];
1335  links[index]->age_index = index;
1336  index = parent;
1337  }
1338  links[index] = link;
1339  link->age_index = index;
1340 }
1341 
1342 static void heap_bubble_down(AVFilterGraph *graph,
1343  AVFilterLink *link, int index)
1344 {
1345  AVFilterLink **links = graph->sink_links;
1346 
1347  av_assert0(index >= 0);
1348 
1349  while (1) {
1350  int child = 2 * index + 1;
1351  if (child >= graph->sink_links_count)
1352  break;
1353  if (child + 1 < graph->sink_links_count &&
1354  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1355  child++;
1356  if (link->current_pts_us < links[child]->current_pts_us)
1357  break;
1358  links[index] = links[child];
1359  links[index]->age_index = index;
1360  index = child;
1361  }
1362  links[index] = link;
1363  link->age_index = index;
1364 }
1365 
1367 {
1368  heap_bubble_up (graph, link, link->age_index);
1369  heap_bubble_down(graph, link, link->age_index);
1370 }
1371 
1372 
1374 {
1375  AVFilterLink *oldest = graph->sink_links[0];
1376  int r;
1377 
1378  while (graph->sink_links_count) {
1379  oldest = graph->sink_links[0];
1380  r = ff_request_frame(oldest);
1381  if (r != AVERROR_EOF)
1382  break;
1383  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1384  oldest->dst ? oldest->dst->name : "unknown",
1385  oldest->dstpad ? oldest->dstpad->name : "unknown");
1386  /* EOF: remove the link from the heap */
1387  if (oldest->age_index < --graph->sink_links_count)
1388  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1389  oldest->age_index);
1390  oldest->age_index = -1;
1391  }
1392  if (!graph->sink_links_count)
1393  return AVERROR_EOF;
1394  av_assert1(oldest->age_index >= 0);
1395  while (oldest->frame_wanted_out) {
1396  r = ff_filter_graph_run_once(graph);
1397  if (r < 0)
1398  return r;
1399  }
1400  return 0;
1401 }
1402 
1404 {
1405  unsigned i, j;
1406  AVFilterContext *f;
1407 
1408  /* TODO: replace scanning the graph with a priority list */
1409  for (i = 0; i < graph->nb_filters; i++) {
1410  f = graph->filters[i];
1411  for (j = 0; j < f->nb_outputs; j++)
1412  if (f->outputs[j]->frame_wanted_in)
1413  return f->outputs[j];
1414  }
1415  for (i = 0; i < graph->nb_filters; i++) {
1416  f = graph->filters[i];
1417  for (j = 0; j < f->nb_outputs; j++)
1418  if (f->outputs[j]->frame_wanted_out)
1419  return f->outputs[j];
1420  }
1421  return NULL;
1422 }
1423 
1425 {
1426  AVFilterLink *link;
1427  int ret;
1428 
1429  link = graph_run_once_find_filter(graph);
1430  if (!link) {
1431  av_log(NULL, AV_LOG_WARNING, "Useless run of a filter graph\n");
1432  return AVERROR(EAGAIN);
1433  }
1434  ret = ff_request_frame_to_filter(link);
1435  if (ret == AVERROR_EOF)
1436  /* local EOF will be forwarded through request_frame() /
1437  set_status() until it reaches the sink */
1438  ret = 0;
1439  return ret < 0 ? ret : 1;
1440 }
AVFilterContext ** filters
Definition: avfilter.h:779
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:631
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
int sink_links_count
Definition: avfilter.h:842
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:645
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2263
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:797
static void swap_samplerates(AVFilterGraph *graph)
AVOption.
Definition: opt.h:245
static void swap_sample_fmts(AVFilterGraph *graph)
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:742
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
const char * fmt
Definition: avisynth_c.h:632
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:70
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:963
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:1264
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:113
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:64
static int reduce_formats_on_filter(AVFilterContext *filter)
static enum AVSampleFormat formats[]
int(* query_formats)(AVFilterContext *)
Query formats supported by the filter on its inputs and outputs.
Definition: avfilter.h:265
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:782
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:300
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:322
#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:313
char * name
name of this filter instance
Definition: avfilter.h:310
#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:830
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:316
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:594
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:804
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:237
#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:82
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:110
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:312
#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:778
unsigned nb_outputs
number of output pads
Definition: avfilter.h:318
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:47
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)
AVFilterLink ** sink_links
Private fields.
Definition: avfilter.h:841
#define CH_DIRECT_PAIR
#define fail()
Definition: checkasm.h:82
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:314
#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:547
#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:593
#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:906
void * av_memdup(const void *p, size_t size)
Duplicate the buffer p.
Definition: mem.c:299
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
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:809
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
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:142
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:594
#define CH_BACK_PAIR
AVMediaType
Definition: avutil.h:191
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:146
unsigned nb_filters
Definition: avfilter.h:780
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:317
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:260
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
static int flags
Definition: cpu.c:47
#define AV_CH_BACK_CENTER
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:104
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:73
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
int nb_channel_layouts
number of channel layouts
Definition: formats.h:87
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:145
#define CH_FRONT_PAIR
struct AVFilterCommand * command_queue
Definition: avfilter.h:347
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:1377
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:2545
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:832
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:305
#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:2179
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
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:308
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
unsigned disable_auto_convert
Definition: avfilter.h:844
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