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avfiltergraph.c
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1 /*
2  * filter graphs
3  * Copyright (c) 2008 Vitor Sessak
4  * Copyright (c) 2007 Bobby Bingham
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 
25 #include <string.h>
26 
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/bprint.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 
35 #define FF_INTERNAL_FIELDS 1
36 #include "framequeue.h"
37 
38 #include "avfilter.h"
39 #include "buffersink.h"
40 #include "formats.h"
41 #include "internal.h"
42 #include "thread.h"
43 
44 #define OFFSET(x) offsetof(AVFilterGraph, x)
45 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
46 static const AVOption filtergraph_options[] = {
47  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
48  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
49  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
50  { "threads", "Maximum number of threads", OFFSET(nb_threads),
51  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
52  {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
53  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
54  {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
55  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
56  { NULL },
57 };
58 
59 static const AVClass filtergraph_class = {
60  .class_name = "AVFilterGraph",
61  .item_name = av_default_item_name,
62  .version = LIBAVUTIL_VERSION_INT,
63  .option = filtergraph_options,
64  .category = AV_CLASS_CATEGORY_FILTER,
65 };
66 
67 #if !HAVE_THREADS
69 {
70 }
71 
73 {
74  graph->thread_type = 0;
75  graph->nb_threads = 1;
76  return 0;
77 }
78 #endif
79 
81 {
82  AVFilterGraph *ret = av_mallocz(sizeof(*ret));
83  if (!ret)
84  return NULL;
85 
86  ret->internal = av_mallocz(sizeof(*ret->internal));
87  if (!ret->internal) {
88  av_freep(&ret);
89  return NULL;
90  }
91 
95 
96  return ret;
97 }
98 
100 {
101  int i, j;
102  for (i = 0; i < graph->nb_filters; i++) {
103  if (graph->filters[i] == filter) {
104  FFSWAP(AVFilterContext*, graph->filters[i],
105  graph->filters[graph->nb_filters - 1]);
106  graph->nb_filters--;
107  filter->graph = NULL;
108  for (j = 0; j<filter->nb_outputs; j++)
109  if (filter->outputs[j])
110  filter->outputs[j]->graph = NULL;
111 
112  return;
113  }
114  }
115 }
116 
118 {
119  if (!*graph)
120  return;
121 
122  while ((*graph)->nb_filters)
123  avfilter_free((*graph)->filters[0]);
124 
125  ff_graph_thread_free(*graph);
126 
127  av_freep(&(*graph)->sink_links);
128 
129  av_freep(&(*graph)->scale_sws_opts);
130  av_freep(&(*graph)->aresample_swr_opts);
131 #if FF_API_LAVR_OPTS
132  av_freep(&(*graph)->resample_lavr_opts);
133 #endif
134  av_freep(&(*graph)->filters);
135  av_freep(&(*graph)->internal);
136  av_freep(graph);
137 }
138 
140  const char *name, const char *args, void *opaque,
141  AVFilterGraph *graph_ctx)
142 {
143  int ret;
144 
145  *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
146  if (!*filt_ctx)
147  return AVERROR(ENOMEM);
148 
149  ret = avfilter_init_str(*filt_ctx, args);
150  if (ret < 0)
151  goto fail;
152 
153  return 0;
154 
155 fail:
156  if (*filt_ctx)
157  avfilter_free(*filt_ctx);
158  *filt_ctx = NULL;
159  return ret;
160 }
161 
163 {
164  graph->disable_auto_convert = flags;
165 }
166 
168  const AVFilter *filter,
169  const char *name)
170 {
172 
173  if (graph->thread_type && !graph->internal->thread_execute) {
174  if (graph->execute) {
175  graph->internal->thread_execute = graph->execute;
176  } else {
177  int ret = ff_graph_thread_init(graph);
178  if (ret < 0) {
179  av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret));
180  return NULL;
181  }
182  }
183  }
184 
185  s = ff_filter_alloc(filter, name);
186  if (!s)
187  return NULL;
188 
189  filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
190  if (!filters) {
191  avfilter_free(s);
192  return NULL;
193  }
194 
195  graph->filters = filters;
196  graph->filters[graph->nb_filters++] = s;
197 
198  s->graph = graph;
199 
200  return s;
201 }
202 
203 /**
204  * Check for the validity of graph.
205  *
206  * A graph is considered valid if all its input and output pads are
207  * connected.
208  *
209  * @return >= 0 in case of success, a negative value otherwise
210  */
211 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
212 {
214  int i, j;
215 
216  for (i = 0; i < graph->nb_filters; i++) {
217  const AVFilterPad *pad;
218  filt = graph->filters[i];
219 
220  for (j = 0; j < filt->nb_inputs; j++) {
221  if (!filt->inputs[j] || !filt->inputs[j]->src) {
222  pad = &filt->input_pads[j];
223  av_log(log_ctx, AV_LOG_ERROR,
224  "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
225  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
226  return AVERROR(EINVAL);
227  }
228  }
229 
230  for (j = 0; j < filt->nb_outputs; j++) {
231  if (!filt->outputs[j] || !filt->outputs[j]->dst) {
232  pad = &filt->output_pads[j];
233  av_log(log_ctx, AV_LOG_ERROR,
234  "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
235  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
236  return AVERROR(EINVAL);
237  }
238  }
239  }
240 
241  return 0;
242 }
243 
244 /**
245  * Configure all the links of graphctx.
246  *
247  * @return >= 0 in case of success, a negative value otherwise
248  */
249 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
250 {
252  int i, ret;
253 
254  for (i = 0; i < graph->nb_filters; i++) {
255  filt = graph->filters[i];
256 
257  if (!filt->nb_outputs) {
258  if ((ret = avfilter_config_links(filt)))
259  return ret;
260  }
261  }
262 
263  return 0;
264 }
265 
267 {
268  int i;
269 
270  for (i = 0; i < graph->nb_filters; i++)
271  if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
272  return graph->filters[i];
273 
274  return NULL;
275 }
276 
278 {
279  if (!l)
280  return;
281  if (l->nb_channel_layouts) {
282  if (l->all_layouts || l->all_counts)
283  av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
284  l->all_layouts = l->all_counts = 0;
285  } else {
286  if (l->all_counts && !l->all_layouts)
287  av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
288  l->all_layouts = 1;
289  }
290 }
291 
293 {
294  int ret, i;
296  AVFilterChannelLayouts *chlayouts;
297  AVFilterFormats *samplerates;
298  enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
299  ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
301 
302  if ((ret = ctx->filter->query_formats(ctx)) < 0) {
303  if (ret != AVERROR(EAGAIN))
304  av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
305  ctx->name, av_err2str(ret));
306  return ret;
307  }
308 
309  for (i = 0; i < ctx->nb_inputs; i++)
311  for (i = 0; i < ctx->nb_outputs; i++)
313 
314  formats = ff_all_formats(type);
315  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
316  return ret;
317  if (type == AVMEDIA_TYPE_AUDIO) {
318  samplerates = ff_all_samplerates();
319  if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
320  return ret;
321  chlayouts = ff_all_channel_layouts();
322  if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
323  return ret;
324  }
325  return 0;
326 }
327 
329 {
330  int i;
331 
332  for (i = 0; i < f->nb_inputs; i++) {
333  if (!f->inputs[i]->out_formats)
334  return 0;
335  if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
336  !(f->inputs[i]->out_samplerates &&
337  f->inputs[i]->out_channel_layouts))
338  return 0;
339  }
340  for (i = 0; i < f->nb_outputs; i++) {
341  if (!f->outputs[i]->in_formats)
342  return 0;
343  if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
344  !(f->outputs[i]->in_samplerates &&
345  f->outputs[i]->in_channel_layouts))
346  return 0;
347  }
348  return 1;
349 }
350 
352 {
353  AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
354  if (a) {
355  a->refcount = 0;
356  a->refs = NULL;
357  a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
358  if (!a->formats && arg->formats)
359  av_freep(&a);
360  }
361  return a;
362 }
363 
365  AVFilterFormats *b_arg,
366  enum AVMediaType type,
367  int is_sample_rate)
368 {
369  AVFilterFormats *a, *b, *ret;
370  if (a_arg == b_arg)
371  return 1;
372  a = clone_filter_formats(a_arg);
373  b = clone_filter_formats(b_arg);
374 
375  if (!a || !b) {
376  if (a)
377  av_freep(&a->formats);
378  if (b)
379  av_freep(&b->formats);
380 
381  av_freep(&a);
382  av_freep(&b);
383 
384  return 0;
385  }
386 
387  if (is_sample_rate) {
388  ret = ff_merge_samplerates(a, b);
389  } else {
390  ret = ff_merge_formats(a, b, type);
391  }
392  if (ret) {
393  av_freep(&ret->formats);
394  av_freep(&ret->refs);
395  av_freep(&ret);
396  return 1;
397  } else {
398  av_freep(&a->formats);
399  av_freep(&b->formats);
400  av_freep(&a);
401  av_freep(&b);
402  return 0;
403  }
404 }
405 
406 /**
407  * Perform one round of query_formats() and merging formats lists on the
408  * filter graph.
409  * @return >=0 if all links formats lists could be queried and merged;
410  * AVERROR(EAGAIN) some progress was made in the queries or merging
411  * and a later call may succeed;
412  * AVERROR(EIO) (may be changed) plus a log message if no progress
413  * was made and the negotiation is stuck;
414  * a negative error code if some other error happened
415  */
416 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
417 {
418  int i, j, ret;
419  int scaler_count = 0, resampler_count = 0;
420  int count_queried = 0; /* successful calls to query_formats() */
421  int count_merged = 0; /* successful merge of formats lists */
422  int count_already_merged = 0; /* lists already merged */
423  int count_delayed = 0; /* lists that need to be merged later */
424 
425  for (i = 0; i < graph->nb_filters; i++) {
426  AVFilterContext *f = graph->filters[i];
427  if (formats_declared(f))
428  continue;
429  if (f->filter->query_formats)
430  ret = filter_query_formats(f);
431  else
432  ret = ff_default_query_formats(f);
433  if (ret < 0 && ret != AVERROR(EAGAIN))
434  return ret;
435  /* note: EAGAIN could indicate a partial success, not counted yet */
436  count_queried += ret >= 0;
437  }
438 
439  /* go through and merge as many format lists as possible */
440  for (i = 0; i < graph->nb_filters; i++) {
441  AVFilterContext *filter = graph->filters[i];
442 
443  for (j = 0; j < filter->nb_inputs; j++) {
444  AVFilterLink *link = filter->inputs[j];
445  int convert_needed = 0;
446 
447  if (!link)
448  continue;
449 
450  if (link->in_formats != link->out_formats
451  && link->in_formats && link->out_formats)
452  if (!can_merge_formats(link->in_formats, link->out_formats,
453  link->type, 0))
454  convert_needed = 1;
455  if (link->type == AVMEDIA_TYPE_AUDIO) {
456  if (link->in_samplerates != link->out_samplerates
457  && link->in_samplerates && link->out_samplerates)
459  link->out_samplerates,
460  0, 1))
461  convert_needed = 1;
462  }
463 
464 #define MERGE_DISPATCH(field, statement) \
465  if (!(link->in_ ## field && link->out_ ## field)) { \
466  count_delayed++; \
467  } else if (link->in_ ## field == link->out_ ## field) { \
468  count_already_merged++; \
469  } else if (!convert_needed) { \
470  count_merged++; \
471  statement \
472  }
473 
474  if (link->type == AVMEDIA_TYPE_AUDIO) {
477  link->out_channel_layouts))
478  convert_needed = 1;
479  )
480  MERGE_DISPATCH(samplerates,
482  link->out_samplerates))
483  convert_needed = 1;
484  )
485  }
487  if (!ff_merge_formats(link->in_formats, link->out_formats,
488  link->type))
489  convert_needed = 1;
490  )
491 #undef MERGE_DISPATCH
492 
493  if (convert_needed) {
495  const AVFilter *filter;
496  AVFilterLink *inlink, *outlink;
497  char scale_args[256];
498  char inst_name[30];
499 
500  if (graph->disable_auto_convert) {
501  av_log(log_ctx, AV_LOG_ERROR,
502  "The filters '%s' and '%s' do not have a common format "
503  "and automatic conversion is disabled.\n",
504  link->src->name, link->dst->name);
505  return AVERROR(EINVAL);
506  }
507 
508  /* couldn't merge format lists. auto-insert conversion filter */
509  switch (link->type) {
510  case AVMEDIA_TYPE_VIDEO:
511  if (!(filter = avfilter_get_by_name("scale"))) {
512  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
513  "not present, cannot convert pixel formats.\n");
514  return AVERROR(EINVAL);
515  }
516 
517  snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
518  scaler_count++);
519 
520  if ((ret = avfilter_graph_create_filter(&convert, filter,
521  inst_name, graph->scale_sws_opts, NULL,
522  graph)) < 0)
523  return ret;
524  break;
525  case AVMEDIA_TYPE_AUDIO:
526  if (!(filter = avfilter_get_by_name("aresample"))) {
527  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
528  "not present, cannot convert audio formats.\n");
529  return AVERROR(EINVAL);
530  }
531 
532  snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
533  resampler_count++);
534  scale_args[0] = '\0';
535  if (graph->aresample_swr_opts)
536  snprintf(scale_args, sizeof(scale_args), "%s",
537  graph->aresample_swr_opts);
538  if ((ret = avfilter_graph_create_filter(&convert, filter,
539  inst_name, graph->aresample_swr_opts,
540  NULL, graph)) < 0)
541  return ret;
542  break;
543  default:
544  return AVERROR(EINVAL);
545  }
546 
547  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
548  return ret;
549 
550  if ((ret = filter_query_formats(convert)) < 0)
551  return ret;
552 
553  inlink = convert->inputs[0];
554  outlink = convert->outputs[0];
555  av_assert0( inlink-> in_formats->refcount > 0);
556  av_assert0( inlink->out_formats->refcount > 0);
557  av_assert0(outlink-> in_formats->refcount > 0);
558  av_assert0(outlink->out_formats->refcount > 0);
559  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
560  av_assert0( inlink-> in_samplerates->refcount > 0);
561  av_assert0( inlink->out_samplerates->refcount > 0);
562  av_assert0(outlink-> in_samplerates->refcount > 0);
563  av_assert0(outlink->out_samplerates->refcount > 0);
564  av_assert0( inlink-> in_channel_layouts->refcount > 0);
565  av_assert0( inlink->out_channel_layouts->refcount > 0);
566  av_assert0(outlink-> in_channel_layouts->refcount > 0);
567  av_assert0(outlink->out_channel_layouts->refcount > 0);
568  }
569  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
570  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
571  ret = AVERROR(ENOSYS);
572  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
574  inlink->out_samplerates) ||
576  inlink->out_channel_layouts)))
577  ret = AVERROR(ENOSYS);
578  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
580  outlink->out_samplerates) ||
582  outlink->out_channel_layouts)))
583  ret = AVERROR(ENOSYS);
584 
585  if (ret < 0) {
586  av_log(log_ctx, AV_LOG_ERROR,
587  "Impossible to convert between the formats supported by the filter "
588  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
589  return ret;
590  }
591  }
592  }
593  }
594 
595  av_log(graph, AV_LOG_DEBUG, "query_formats: "
596  "%d queried, %d merged, %d already done, %d delayed\n",
597  count_queried, count_merged, count_already_merged, count_delayed);
598  if (count_delayed) {
599  AVBPrint bp;
600 
601  /* if count_queried > 0, one filter at least did set its formats,
602  that will give additional information to its neighbour;
603  if count_merged > 0, one pair of formats lists at least was merged,
604  that will give additional information to all connected filters;
605  in both cases, progress was made and a new round must be done */
606  if (count_queried || count_merged)
607  return AVERROR(EAGAIN);
609  for (i = 0; i < graph->nb_filters; i++)
610  if (!formats_declared(graph->filters[i]))
611  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
612  graph->filters[i]->name);
613  av_log(graph, AV_LOG_ERROR,
614  "The following filters could not choose their formats: %s\n"
615  "Consider inserting the (a)format filter near their input or "
616  "output.\n", bp.str);
617  return AVERROR(EIO);
618  }
619  return 0;
620 }
621 
622 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
623 {
624  int score = 0;
625 
626  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
627  score ++;
628 
629  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
630  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
631  }else
632  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
633 
636  score += 20;
637 
640  score += 2;
641 
642  return score;
643 }
644 
646  enum AVSampleFormat src_fmt)
647 {
648  int score1, score2;
649 
650  score1 = get_fmt_score(dst_fmt1, src_fmt);
651  score2 = get_fmt_score(dst_fmt2, src_fmt);
652 
653  return score1 < score2 ? dst_fmt1 : dst_fmt2;
654 }
655 
657 {
658  if (!link || !link->in_formats)
659  return 0;
660 
661  if (link->type == AVMEDIA_TYPE_VIDEO) {
662  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
663  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
664  enum AVPixelFormat best= AV_PIX_FMT_NONE;
665  int i;
666  for (i=0; i<link->in_formats->nb_formats; i++) {
667  enum AVPixelFormat p = link->in_formats->formats[i];
668  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
669  }
670  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
672  av_get_pix_fmt_name(ref->format), has_alpha);
673  link->in_formats->formats[0] = best;
674  }
675  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
676  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
678  int i;
679  for (i=0; i<link->in_formats->nb_formats; i++) {
680  enum AVSampleFormat p = link->in_formats->formats[i];
681  best = find_best_sample_fmt_of_2(best, p, ref->format);
682  }
683  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
686  link->in_formats->formats[0] = best;
687  }
688  }
689 
690  link->in_formats->nb_formats = 1;
691  link->format = link->in_formats->formats[0];
692 
693  if (link->type == AVMEDIA_TYPE_AUDIO) {
694  if (!link->in_samplerates->nb_formats) {
695  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
696  " the link between filters %s and %s.\n", link->src->name,
697  link->dst->name);
698  return AVERROR(EINVAL);
699  }
700  link->in_samplerates->nb_formats = 1;
701  link->sample_rate = link->in_samplerates->formats[0];
702 
703  if (link->in_channel_layouts->all_layouts) {
704  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
705  " the link between filters %s and %s.\n", link->src->name,
706  link->dst->name);
707  if (!link->in_channel_layouts->all_counts)
708  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
709  "supported, try specifying a channel layout using "
710  "'aformat=channel_layouts=something'.\n");
711  return AVERROR(EINVAL);
712  }
715  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
716  link->channel_layout = 0;
717  else
719  }
720 
727 
728  return 0;
729 }
730 
731 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
732 do { \
733  for (i = 0; i < filter->nb_inputs; i++) { \
734  AVFilterLink *link = filter->inputs[i]; \
735  fmt_type fmt; \
736  \
737  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
738  continue; \
739  fmt = link->out_ ## list->var[0]; \
740  \
741  for (j = 0; j < filter->nb_outputs; j++) { \
742  AVFilterLink *out_link = filter->outputs[j]; \
743  list_type *fmts; \
744  \
745  if (link->type != out_link->type || \
746  out_link->in_ ## list->nb == 1) \
747  continue; \
748  fmts = out_link->in_ ## list; \
749  \
750  if (!out_link->in_ ## list->nb) { \
751  if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
752  return ret; \
753  ret = 1; \
754  break; \
755  } \
756  \
757  for (k = 0; k < out_link->in_ ## list->nb; k++) \
758  if (fmts->var[k] == fmt) { \
759  fmts->var[0] = fmt; \
760  fmts->nb = 1; \
761  ret = 1; \
762  break; \
763  } \
764  } \
765  } \
766 } while (0)
767 
769 {
770  int i, j, k, ret = 0;
771 
773  nb_formats, ff_add_format, ff_formats_unref);
774  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
775  nb_formats, ff_add_format, ff_formats_unref);
776 
777  /* reduce channel layouts */
778  for (i = 0; i < filter->nb_inputs; i++) {
779  AVFilterLink *inlink = filter->inputs[i];
780  uint64_t fmt;
781 
782  if (!inlink->out_channel_layouts ||
784  continue;
785  fmt = inlink->out_channel_layouts->channel_layouts[0];
786 
787  for (j = 0; j < filter->nb_outputs; j++) {
788  AVFilterLink *outlink = filter->outputs[j];
790 
791  fmts = outlink->in_channel_layouts;
792  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
793  continue;
794 
795  if (fmts->all_layouts &&
796  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
797  /* Turn the infinite list into a singleton */
798  fmts->all_layouts = fmts->all_counts = 0;
799  if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
800  ret = 1;
801  break;
802  }
803 
804  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
805  if (fmts->channel_layouts[k] == fmt) {
806  fmts->channel_layouts[0] = fmt;
807  fmts->nb_channel_layouts = 1;
808  ret = 1;
809  break;
810  }
811  }
812  }
813  }
814 
815  return ret;
816 }
817 
818 static int reduce_formats(AVFilterGraph *graph)
819 {
820  int i, reduced, ret;
821 
822  do {
823  reduced = 0;
824 
825  for (i = 0; i < graph->nb_filters; i++) {
826  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
827  return ret;
828  reduced |= ret;
829  }
830  } while (reduced);
831 
832  return 0;
833 }
834 
836 {
837  AVFilterLink *link = NULL;
838  int sample_rate;
839  int i, j;
840 
841  for (i = 0; i < filter->nb_inputs; i++) {
842  link = filter->inputs[i];
843 
844  if (link->type == AVMEDIA_TYPE_AUDIO &&
845  link->out_samplerates->nb_formats== 1)
846  break;
847  }
848  if (i == filter->nb_inputs)
849  return;
850 
851  sample_rate = link->out_samplerates->formats[0];
852 
853  for (i = 0; i < filter->nb_outputs; i++) {
854  AVFilterLink *outlink = filter->outputs[i];
855  int best_idx, best_diff = INT_MAX;
856 
857  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
858  outlink->in_samplerates->nb_formats < 2)
859  continue;
860 
861  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
862  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
863 
864  av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
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  const 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_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  if (!*queue)
1311  return AVERROR(ENOMEM);
1312 
1313  (*queue)->command = av_strdup(command);
1314  (*queue)->arg = av_strdup(arg);
1315  (*queue)->time = ts;
1316  (*queue)->flags = flags;
1317  (*queue)->next = next;
1318  if(flags & AVFILTER_CMD_FLAG_ONE)
1319  return 0;
1320  }
1321  }
1322 
1323  return 0;
1324 }
1325 
1326 static void heap_bubble_up(AVFilterGraph *graph,
1327  AVFilterLink *link, int index)
1328 {
1329  AVFilterLink **links = graph->sink_links;
1330 
1331  av_assert0(index >= 0);
1332 
1333  while (index) {
1334  int parent = (index - 1) >> 1;
1335  if (links[parent]->current_pts_us >= link->current_pts_us)
1336  break;
1337  links[index] = links[parent];
1338  links[index]->age_index = index;
1339  index = parent;
1340  }
1341  links[index] = link;
1342  link->age_index = index;
1343 }
1344 
1345 static void heap_bubble_down(AVFilterGraph *graph,
1346  AVFilterLink *link, int index)
1347 {
1348  AVFilterLink **links = graph->sink_links;
1349 
1350  av_assert0(index >= 0);
1351 
1352  while (1) {
1353  int child = 2 * index + 1;
1354  if (child >= graph->sink_links_count)
1355  break;
1356  if (child + 1 < graph->sink_links_count &&
1357  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1358  child++;
1359  if (link->current_pts_us < links[child]->current_pts_us)
1360  break;
1361  links[index] = links[child];
1362  links[index]->age_index = index;
1363  index = child;
1364  }
1365  links[index] = link;
1366  link->age_index = index;
1367 }
1368 
1370 {
1371  heap_bubble_up (graph, link, link->age_index);
1372  heap_bubble_down(graph, link, link->age_index);
1373 }
1374 
1376 {
1377  AVFilterLink *oldest = graph->sink_links[0];
1378  int64_t frame_count;
1379  int r;
1380 
1381  while (graph->sink_links_count) {
1382  oldest = graph->sink_links[0];
1383  if (oldest->dst->filter->activate) {
1384  /* For now, buffersink is the only filter implementing activate. */
1385  r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1387  if (r != AVERROR_EOF)
1388  return r;
1389  } else {
1390  r = ff_request_frame(oldest);
1391  }
1392  if (r != AVERROR_EOF)
1393  break;
1394  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1395  oldest->dst ? oldest->dst->name : "unknown",
1396  oldest->dstpad ? oldest->dstpad->name : "unknown");
1397  /* EOF: remove the link from the heap */
1398  if (oldest->age_index < --graph->sink_links_count)
1399  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1400  oldest->age_index);
1401  oldest->age_index = -1;
1402  }
1403  if (!graph->sink_links_count)
1404  return AVERROR_EOF;
1405  av_assert1(!oldest->dst->filter->activate);
1406  av_assert1(oldest->age_index >= 0);
1407  frame_count = oldest->frame_count_out;
1408  while (frame_count == oldest->frame_count_out) {
1409  r = ff_filter_graph_run_once(graph);
1410  if (r == AVERROR(EAGAIN) &&
1411  !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1412  !oldest->status_in)
1413  ff_request_frame(oldest);
1414  else if (r < 0)
1415  return r;
1416  }
1417  return 0;
1418 }
1419 
1421 {
1423  unsigned i;
1424 
1425  av_assert0(graph->nb_filters);
1426  filter = graph->filters[0];
1427  for (i = 1; i < graph->nb_filters; i++)
1428  if (graph->filters[i]->ready > filter->ready)
1429  filter = graph->filters[i];
1430  if (!filter->ready)
1431  return AVERROR(EAGAIN);
1432  return ff_filter_activate(filter);
1433 }
AVFilterContext ** filters
Definition: avfilter.h:805
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:870
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:696
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2419
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:825
static void swap_samplerates(AVFilterGraph *graph)
AVOption.
Definition: opt.h:246
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
static void swap_sample_fmts(AVFilterGraph *graph)
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:793
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
const char * fmt
Definition: avisynth_c.h:769
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:80
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
Main libavfilter public API header.
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
Check validity and configure all the links and formats in the graph.
struct AVFilterInOut * next
next input/input in the list, NULL if this is the last
Definition: avfilter.h:977
static int reduce_formats(AVFilterGraph *graph)
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1291
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:113
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
static int reduce_formats_on_filter(AVFilterContext *filter)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
int(* query_formats)(AVFilterContext *)
Query formats supported by the filter on its inputs and outputs.
Definition: avfilter.h:282
static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:808
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:230
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:333
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:355
#define OFFSET(x)
Definition: avfiltergraph.c:44
memory buffer sink API for audio and video
const char * name
Pad name.
Definition: internal.h:60
static int pick_format(AVFilterLink *link, AVFilterLink *ref)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
int ff_filter_graph_run_once(AVFilterGraph *graph)
Run one round of processing on a filter graph.
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
char * name
name of this filter instance
Definition: avfilter.h:343
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
avfilter_execute_func * execute
This callback may be set by the caller immediately after allocating the graph and before adding any f...
Definition: avfilter.h:858
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:349
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhd.c:97
unsigned ready
Ready status of the filter.
Definition: avfilter.h:408
AVOptions.
#define FF_LAYOUT2COUNT(l)
Decode a channel count encoded as a channel layout.
Definition: formats.h:108
AVS_FilterInfo AVS_Value child
Definition: avisynth_c.h:731
struct AVFilterFormats *** refs
references to this list
Definition: formats.h:69
#define AV_CH_LOW_FREQUENCY
int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx)
Create and add a filter instance into an existing graph.
static int pick_formats(AVFilterGraph *graph)
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:832
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:275
static int flags
Definition: log.c:57
#define AVERROR_EOF
End of file.
Definition: error.h:55
AVFilterContext * avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
Get a filter instance identified by instance name from graph.
enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt)
Get the planar alternative form of the given sample format.
Definition: samplefmt.c:84
signed 32 bits
Definition: samplefmt.h:62
#define av_log(a,...)
AVFilterFormats * ff_all_formats(enum AVMediaType type)
Return a list of all formats supported by FFmpeg for the given media type.
Definition: formats.c:350
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
A filter pad used for either input or output.
Definition: internal.h:54
unsigned refcount
number of references to this list
Definition: formats.h:68
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
#define FLAGS
Definition: avfiltergraph.c:45
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
const AVClass * av_class
Definition: avfilter.h:804
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
const char * r
Definition: vf_curves.c:111
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
uint64_t * channel_layouts
list of channel layouts
Definition: formats.h:86
const char * arg
Definition: jacosubdec.c:66
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
static void heap_bubble_down(AVFilterGraph *graph, AVFilterLink *link, int index)
#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format)
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:269
AVFilterLink ** sink_links
Private fields.
Definition: avfilter.h:869
int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
Get a frame with filtered data from sink and put it in frame.
Definition: buffersink.c:119
#define CH_DIRECT_PAIR
#define fail()
Definition: checkasm.h:109
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:579
common internal API header
static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
Configure the formats of all the links in the graph.
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
audio channel layout utility functions
static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
static void swap_sample_fmts_on_filter(AVFilterContext *filter)
struct AVFilterCommand * next
Definition: internal.h:43
#define CH_CENTER_PAIR
static const AVOption filtergraph_options[]
Definition: avfiltergraph.c:46
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
AVFormatContext * ctx
Definition: movenc.c:48
static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
Check for the validity of graph.
static int convert(uint8_t x)
Definition: xbmdec.c:29
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
unsigned nb_formats
number of formats
Definition: formats.h:65
int n
Definition: avisynth_c.h:684
#define AVFILTER_CMD_FLAG_ONE
Stop once a filter understood the command (for target=all for example), fast filters are favored auto...
Definition: avfilter.h:671
#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:957
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
Insert a filter in the middle of an existing link.
Definition: avfilter.c:238
void ff_graph_thread_free(AVFilterGraph *graph)
Definition: avfiltergraph.c:68
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:597
sample_rate
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:237
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static void heap_bubble_up(AVFilterGraph *graph, AVFilterLink *link, int index)
static int formats_declared(AVFilterContext *f)
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:837
char all_layouts
accept any known channel layout
Definition: formats.h:88
AVFilterChannelLayouts * ff_merge_channel_layouts(AVFilterChannelLayouts *a, AVFilterChannelLayouts *b)
Return a channel layouts/samplerates list which contains the intersection of the layouts/samplerates ...
Definition: formats.c:166
AVFilterFormats * ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b, enum AVMediaType type)
Return a format list which contains the intersection of the formats of a and b.
Definition: formats.c:92
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_drawtext.c:863
void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
Update the position of a link in the age heap.
void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
Remove a reference to a channel layouts list.
Definition: formats.c:481
int avfilter_graph_request_oldest(AVFilterGraph *graph)
Request a frame on the oldest sink link.
int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
Make the filter instance process a command.
Definition: avfilter.c:555
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:113
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
int index
Definition: gxfenc.c:89
#define AVFILTER_CMD_FLAG_FAST
Only execute command when its fast (like a video out that supports contrast adjustment in hw) ...
Definition: avfilter.h:672
#define CH_BACK_PAIR
AVMediaType
Definition: avutil.h:199
void ff_formats_unref(AVFilterFormats **ref)
If *ref is non-NULL, remove *ref as a reference to the format list it currently points to...
Definition: formats.c:476
const char * name
Filter name.
Definition: avfilter.h:148
unsigned nb_filters
Definition: avfilter.h:806
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
static const int8_t filt[NUMTAPS]
Definition: af_earwax.c:39
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:79
#define AV_CH_BACK_CENTER
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
Perform one round of query_formats() and merging formats lists on the filter graph.
int ff_graph_thread_init(AVFilterGraph *graph)
Definition: avfiltergraph.c:72
static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
Configure all the links of graphctx.
static void swap_channel_layouts(AVFilterGraph *graph)
#define MERGE_DISPATCH(field, statement)
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
Get the packed alternative form of the given sample format.
Definition: samplefmt.c:75
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
int nb_channel_layouts
number of channel layouts
Definition: formats.h:87
#define CH_FRONT_PAIR
struct AVFilterCommand * command_queue
Definition: avfilter.h:380
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
Send a command to one or more filter instances.
unsigned bps
Definition: movenc.c:1410
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:2709
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:860
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
Remove a filter from a graph;.
Definition: avfiltergraph.c:99
#define AV_BUFFERSINK_FLAG_PEEK
Tell av_buffersink_get_buffer_ref() to read video/samples buffer reference, but not remove it from th...
Definition: buffersink.h:53
static av_always_inline int diff(const uint32_t a, const uint32_t b)
avfilter_execute_func * thread_execute
Definition: internal.h:150
AVFilterContext * avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name)
Create a new filter instance in a filter graph.
static const struct PPFilter filters[]
Definition: postprocess.c:134
unsigned refcount
number of references to this list
Definition: formats.h:91
A list of supported formats for one end of a filter link.
Definition: formats.h:64
void ff_framequeue_global_init(FFFrameQueueGlobal *fqg)
Init a global structure.
Definition: framequeue.c:30
static const AVClass filtergraph_class
Definition: avfiltergraph.c:59
An instance of a filter.
Definition: avfilter.h:338
#define av_freep(p)
#define CH_SIDE_PAIR
FFFrameQueueGlobal frame_queues
Definition: internal.h:151
double time
time expressed in seconds
Definition: internal.h:39
int needs_fifo
The filter expects a fifo to be inserted on its input link, typically because it has a delay...
Definition: internal.h:137
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:405
formats
Definition: signature.h:48
#define FFSWAP(type, a, b)
Definition: common.h:99
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2335
static int filter_query_formats(AVFilterContext *ctx)
AVFilterFormats * ff_merge_samplerates(AVFilterFormats *a, AVFilterFormats *b)
Definition: formats.c:139
internal API functions
int ff_filter_activate(AVFilterContext *filter)
Definition: avfilter.c:1454
int(* activate)(AVFilterContext *ctx)
Filter activation function.
Definition: avfilter.h:327
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
#define CH_WIDE_PAIR
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
unsigned disable_auto_convert
Definition: avfilter.h:872
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