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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;
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  return;
103  }
104  }
105 }
106 
108 {
109  if (!*graph)
110  return;
111 
112  while ((*graph)->nb_filters)
113  avfilter_free((*graph)->filters[0]);
114 
115  ff_graph_thread_free(*graph);
116 
117  av_freep(&(*graph)->sink_links);
118 
119  av_freep(&(*graph)->scale_sws_opts);
120  av_freep(&(*graph)->aresample_swr_opts);
121  av_freep(&(*graph)->resample_lavr_opts);
122  av_freep(&(*graph)->filters);
123  av_freep(&(*graph)->internal);
124  av_freep(graph);
125 }
126 
127 #if FF_API_AVFILTER_OPEN
128 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
129 {
131  sizeof(*filters) * (graph->nb_filters + 1));
132  if (!filters)
133  return AVERROR(ENOMEM);
134 
135  graph->filters = filters;
136  graph->filters[graph->nb_filters++] = filter;
137 
138 #if FF_API_FOO_COUNT
140  graph->filter_count_unused = graph->nb_filters;
142 #endif
143 
144  filter->graph = graph;
145 
146  return 0;
147 }
148 #endif
149 
151  const char *name, const char *args, void *opaque,
152  AVFilterGraph *graph_ctx)
153 {
154  int ret;
155 
156  *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
157  if (!*filt_ctx)
158  return AVERROR(ENOMEM);
159 
160  ret = avfilter_init_str(*filt_ctx, args);
161  if (ret < 0)
162  goto fail;
163 
164  return 0;
165 
166 fail:
167  if (*filt_ctx)
168  avfilter_free(*filt_ctx);
169  *filt_ctx = NULL;
170  return ret;
171 }
172 
174 {
175  graph->disable_auto_convert = flags;
176 }
177 
179  const AVFilter *filter,
180  const char *name)
181 {
183 
184  if (graph->thread_type && !graph->internal->thread_execute) {
185  if (graph->execute) {
186  graph->internal->thread_execute = graph->execute;
187  } else {
188  int ret = ff_graph_thread_init(graph);
189  if (ret < 0) {
190  av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
191  return NULL;
192  }
193  }
194  }
195 
196  s = ff_filter_alloc(filter, name);
197  if (!s)
198  return NULL;
199 
200  filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
201  if (!filters) {
202  avfilter_free(s);
203  return NULL;
204  }
205 
206  graph->filters = filters;
207  graph->filters[graph->nb_filters++] = s;
208 
209 #if FF_API_FOO_COUNT
211  graph->filter_count_unused = graph->nb_filters;
213 #endif
214 
215  s->graph = graph;
216 
217  return s;
218 }
219 
220 /**
221  * Check for the validity of graph.
222  *
223  * A graph is considered valid if all its input and output pads are
224  * connected.
225  *
226  * @return >= 0 in case of success, a negative value otherwise
227  */
228 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
229 {
231  int i, j;
232 
233  for (i = 0; i < graph->nb_filters; i++) {
234  const AVFilterPad *pad;
235  filt = graph->filters[i];
236 
237  for (j = 0; j < filt->nb_inputs; j++) {
238  if (!filt->inputs[j] || !filt->inputs[j]->src) {
239  pad = &filt->input_pads[j];
240  av_log(log_ctx, AV_LOG_ERROR,
241  "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
242  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
243  return AVERROR(EINVAL);
244  }
245  }
246 
247  for (j = 0; j < filt->nb_outputs; j++) {
248  if (!filt->outputs[j] || !filt->outputs[j]->dst) {
249  pad = &filt->output_pads[j];
250  av_log(log_ctx, AV_LOG_ERROR,
251  "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
252  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
253  return AVERROR(EINVAL);
254  }
255  }
256  }
257 
258  return 0;
259 }
260 
261 /**
262  * Configure all the links of graphctx.
263  *
264  * @return >= 0 in case of success, a negative value otherwise
265  */
266 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
267 {
269  int i, ret;
270 
271  for (i = 0; i < graph->nb_filters; i++) {
272  filt = graph->filters[i];
273 
274  if (!filt->nb_outputs) {
275  if ((ret = avfilter_config_links(filt)))
276  return ret;
277  }
278  }
279 
280  return 0;
281 }
282 
284 {
285  int i;
286 
287  for (i = 0; i < graph->nb_filters; i++)
288  if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
289  return graph->filters[i];
290 
291  return NULL;
292 }
293 
295 {
296  if (!l)
297  return;
298  if (l->nb_channel_layouts) {
299  if (l->all_layouts || l->all_counts)
300  av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
301  l->all_layouts = l->all_counts = 0;
302  } else {
303  if (l->all_counts && !l->all_layouts)
304  av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
305  l->all_layouts = 1;
306  }
307 }
308 
310 {
311  int ret, i;
313  AVFilterChannelLayouts *chlayouts;
314  AVFilterFormats *samplerates;
315  enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
316  ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
318 
319  if ((ret = ctx->filter->query_formats(ctx)) < 0) {
320  if (ret != AVERROR(EAGAIN))
321  av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
322  ctx->name, av_err2str(ret));
323  return ret;
324  }
325 
326  for (i = 0; i < ctx->nb_inputs; i++)
328  for (i = 0; i < ctx->nb_outputs; i++)
330 
331  formats = ff_all_formats(type);
332  if (!formats)
333  return AVERROR(ENOMEM);
334  ff_set_common_formats(ctx, formats);
335  if (type == AVMEDIA_TYPE_AUDIO) {
336  samplerates = ff_all_samplerates();
337  if (!samplerates)
338  return AVERROR(ENOMEM);
339  ff_set_common_samplerates(ctx, samplerates);
340  chlayouts = ff_all_channel_layouts();
341  if (!chlayouts)
342  return AVERROR(ENOMEM);
343  ff_set_common_channel_layouts(ctx, chlayouts);
344  }
345  return 0;
346 }
347 
349 {
350  int i;
351 
352  for (i = 0; i < f->nb_inputs; i++) {
353  if (!f->inputs[i]->out_formats)
354  return 0;
355  if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
356  !(f->inputs[i]->out_samplerates &&
357  f->inputs[i]->out_channel_layouts))
358  return 0;
359  }
360  for (i = 0; i < f->nb_outputs; i++) {
361  if (!f->outputs[i]->in_formats)
362  return 0;
363  if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
364  !(f->outputs[i]->in_samplerates &&
365  f->outputs[i]->in_channel_layouts))
366  return 0;
367  }
368  return 1;
369 }
370 
372 {
373  AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
374  if (a) {
375  a->refcount = 0;
376  a->refs = NULL;
377  a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
378  if (!a->formats && arg->formats)
379  av_freep(&a);
380  }
381  return a;
382 }
383 
385  AVFilterFormats *b_arg,
386  enum AVMediaType type,
387  int is_sample_rate)
388 {
389  AVFilterFormats *a, *b, *ret;
390  if (a_arg == b_arg)
391  return 1;
392  a = clone_filter_formats(a_arg);
393  b = clone_filter_formats(b_arg);
394 
395  if (!a || !b) {
396  if (a)
397  av_freep(&a->formats);
398  if (b)
399  av_freep(&b->formats);
400 
401  av_freep(&a);
402  av_freep(&b);
403 
404  return 0;
405  }
406 
407  if (is_sample_rate) {
408  ret = ff_merge_samplerates(a, b);
409  } else {
410  ret = ff_merge_formats(a, b, type);
411  }
412  if (ret) {
413  av_freep(&ret->formats);
414  av_freep(&ret->refs);
415  av_freep(&ret);
416  return 1;
417  } else {
418  av_freep(&a->formats);
419  av_freep(&b->formats);
420  av_freep(&a);
421  av_freep(&b);
422  return 0;
423  }
424 }
425 
426 /**
427  * Perform one round of query_formats() and merging formats lists on the
428  * filter graph.
429  * @return >=0 if all links formats lists could be queried and merged;
430  * AVERROR(EAGAIN) some progress was made in the queries or merging
431  * and a later call may succeed;
432  * AVERROR(EIO) (may be changed) plus a log message if no progress
433  * was made and the negotiation is stuck;
434  * a negative error code if some other error happened
435  */
436 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
437 {
438  int i, j, ret;
439  int scaler_count = 0, resampler_count = 0;
440  int count_queried = 0; /* successful calls to query_formats() */
441  int count_merged = 0; /* successful merge of formats lists */
442  int count_already_merged = 0; /* lists already merged */
443  int count_delayed = 0; /* lists that need to be merged later */
444 
445  for (i = 0; i < graph->nb_filters; i++) {
446  AVFilterContext *f = graph->filters[i];
447  if (formats_declared(f))
448  continue;
449  if (f->filter->query_formats)
450  ret = filter_query_formats(f);
451  else
452  ret = ff_default_query_formats(f);
453  if (ret < 0 && ret != AVERROR(EAGAIN))
454  return ret;
455  /* note: EAGAIN could indicate a partial success, not counted yet */
456  count_queried += ret >= 0;
457  }
458 
459  /* go through and merge as many format lists as possible */
460  for (i = 0; i < graph->nb_filters; i++) {
461  AVFilterContext *filter = graph->filters[i];
462 
463  for (j = 0; j < filter->nb_inputs; j++) {
464  AVFilterLink *link = filter->inputs[j];
465  int convert_needed = 0;
466 
467  if (!link)
468  continue;
469 
470  if (link->in_formats != link->out_formats
471  && link->in_formats && link->out_formats)
472  if (!can_merge_formats(link->in_formats, link->out_formats,
473  link->type, 0))
474  convert_needed = 1;
475  if (link->type == AVMEDIA_TYPE_AUDIO) {
476  if (link->in_samplerates != link->out_samplerates
477  && link->in_samplerates && link->out_samplerates)
479  link->out_samplerates,
480  0, 1))
481  convert_needed = 1;
482  }
483 
484 #define MERGE_DISPATCH(field, statement) \
485  if (!(link->in_ ## field && link->out_ ## field)) { \
486  count_delayed++; \
487  } else if (link->in_ ## field == link->out_ ## field) { \
488  count_already_merged++; \
489  } else if (!convert_needed) { \
490  count_merged++; \
491  statement \
492  }
493 
494  if (link->type == AVMEDIA_TYPE_AUDIO) {
495  MERGE_DISPATCH(channel_layouts,
497  link->out_channel_layouts))
498  convert_needed = 1;
499  )
500  MERGE_DISPATCH(samplerates,
502  link->out_samplerates))
503  convert_needed = 1;
504  )
505  }
507  if (!ff_merge_formats(link->in_formats, link->out_formats,
508  link->type))
509  convert_needed = 1;
510  )
511 #undef MERGE_DISPATCH
512 
513  if (convert_needed) {
515  AVFilter *filter;
516  AVFilterLink *inlink, *outlink;
517  char scale_args[256];
518  char inst_name[30];
519 
520  /* couldn't merge format lists. auto-insert conversion filter */
521  switch (link->type) {
522  case AVMEDIA_TYPE_VIDEO:
523  if (!(filter = avfilter_get_by_name("scale"))) {
524  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
525  "not present, cannot convert pixel formats.\n");
526  return AVERROR(EINVAL);
527  }
528 
529  snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
530  scaler_count++);
531 
532  if ((ret = avfilter_graph_create_filter(&convert, filter,
533  inst_name, graph->scale_sws_opts, NULL,
534  graph)) < 0)
535  return ret;
536  break;
537  case AVMEDIA_TYPE_AUDIO:
538  if (!(filter = avfilter_get_by_name("aresample"))) {
539  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
540  "not present, cannot convert audio formats.\n");
541  return AVERROR(EINVAL);
542  }
543 
544  snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
545  resampler_count++);
546  scale_args[0] = '\0';
547  if (graph->aresample_swr_opts)
548  snprintf(scale_args, sizeof(scale_args), "%s",
549  graph->aresample_swr_opts);
550  if ((ret = avfilter_graph_create_filter(&convert, filter,
551  inst_name, graph->aresample_swr_opts,
552  NULL, graph)) < 0)
553  return ret;
554  break;
555  default:
556  return AVERROR(EINVAL);
557  }
558 
559  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
560  return ret;
561 
562  if ((ret = filter_query_formats(convert)) < 0)
563  return ret;
564 
565  inlink = convert->inputs[0];
566  outlink = convert->outputs[0];
567  av_assert0( inlink-> in_formats->refcount > 0);
568  av_assert0( inlink->out_formats->refcount > 0);
569  av_assert0(outlink-> in_formats->refcount > 0);
570  av_assert0(outlink->out_formats->refcount > 0);
571  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
572  av_assert0( inlink-> in_samplerates->refcount > 0);
573  av_assert0( inlink->out_samplerates->refcount > 0);
574  av_assert0(outlink-> in_samplerates->refcount > 0);
575  av_assert0(outlink->out_samplerates->refcount > 0);
576  av_assert0( inlink-> in_channel_layouts->refcount > 0);
577  av_assert0( inlink->out_channel_layouts->refcount > 0);
578  av_assert0(outlink-> in_channel_layouts->refcount > 0);
579  av_assert0(outlink->out_channel_layouts->refcount > 0);
580  }
581  if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
582  !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
583  ret = AVERROR(ENOSYS);
584  if (inlink->type == AVMEDIA_TYPE_AUDIO &&
586  inlink->out_samplerates) ||
588  inlink->out_channel_layouts)))
589  ret = AVERROR(ENOSYS);
590  if (outlink->type == AVMEDIA_TYPE_AUDIO &&
592  outlink->out_samplerates) ||
594  outlink->out_channel_layouts)))
595  ret = AVERROR(ENOSYS);
596 
597  if (ret < 0) {
598  av_log(log_ctx, AV_LOG_ERROR,
599  "Impossible to convert between the formats supported by the filter "
600  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
601  return ret;
602  }
603  }
604  }
605  }
606 
607  av_log(graph, AV_LOG_DEBUG, "query_formats: "
608  "%d queried, %d merged, %d already done, %d delayed\n",
609  count_queried, count_merged, count_already_merged, count_delayed);
610  if (count_delayed) {
611  AVBPrint bp;
612 
613  /* if count_queried > 0, one filter at least did set its formats,
614  that will give additional information to its neighbour;
615  if count_merged > 0, one pair of formats lists at least was merged,
616  that will give additional information to all connected filters;
617  in both cases, progress was made and a new round must be done */
618  if (count_queried || count_merged)
619  return AVERROR(EAGAIN);
621  for (i = 0; i < graph->nb_filters; i++)
622  if (!formats_declared(graph->filters[i]))
623  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
624  graph->filters[i]->name);
625  av_log(graph, AV_LOG_ERROR,
626  "The following filters could not choose their formats: %s\n"
627  "Consider inserting the (a)format filter near their input or "
628  "output.\n", bp.str);
629  return AVERROR(EIO);
630  }
631  return 0;
632 }
633 
634 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
635 {
636  int score = 0;
637 
638  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
639  score ++;
640 
641  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
642  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
643  }else
644  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
645 
648  score += 20;
649 
652  score += 2;
653 
654  return score;
655 }
656 
658  enum AVSampleFormat src_fmt)
659 {
660  int score1, score2;
661 
662  score1 = get_fmt_score(dst_fmt1, src_fmt);
663  score2 = get_fmt_score(dst_fmt2, src_fmt);
664 
665  return score1 < score2 ? dst_fmt1 : dst_fmt2;
666 }
667 
668 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
669 {
670  if (!link || !link->in_formats)
671  return 0;
672 
673  if (link->type == AVMEDIA_TYPE_VIDEO) {
674  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
675  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
676  enum AVPixelFormat best= AV_PIX_FMT_NONE;
677  int i;
678  for (i=0; i<link->in_formats->nb_formats; i++) {
679  enum AVPixelFormat p = link->in_formats->formats[i];
680  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
681  }
682  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
684  av_get_pix_fmt_name(ref->format), has_alpha);
685  link->in_formats->formats[0] = best;
686  }
687  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
688  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
690  int i;
691  for (i=0; i<link->in_formats->nb_formats; i++) {
692  enum AVSampleFormat p = link->in_formats->formats[i];
693  best = find_best_sample_fmt_of_2(best, p, ref->format);
694  }
695  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
698  link->in_formats->formats[0] = best;
699  }
700  }
701 
702  link->in_formats->nb_formats = 1;
703  link->format = link->in_formats->formats[0];
704 
705  if (link->type == AVMEDIA_TYPE_AUDIO) {
706  if (!link->in_samplerates->nb_formats) {
707  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
708  " the link between filters %s and %s.\n", link->src->name,
709  link->dst->name);
710  return AVERROR(EINVAL);
711  }
712  link->in_samplerates->nb_formats = 1;
713  link->sample_rate = link->in_samplerates->formats[0];
714 
715  if (link->in_channel_layouts->all_layouts) {
716  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
717  " the link between filters %s and %s.\n", link->src->name,
718  link->dst->name);
719  if (!link->in_channel_layouts->all_counts)
720  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
721  "supported, try specifying a channel layout using "
722  "'aformat=channel_layouts=something'.\n");
723  return AVERROR(EINVAL);
724  }
727  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
728  link->channel_layout = 0;
729  else
731  }
732 
739 
740  return 0;
741 }
742 
743 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
744 do { \
745  for (i = 0; i < filter->nb_inputs; i++) { \
746  AVFilterLink *link = filter->inputs[i]; \
747  fmt_type fmt; \
748  \
749  if (!link->out_ ## list || link->out_ ## list->nb != 1) \
750  continue; \
751  fmt = link->out_ ## list->var[0]; \
752  \
753  for (j = 0; j < filter->nb_outputs; j++) { \
754  AVFilterLink *out_link = filter->outputs[j]; \
755  list_type *fmts; \
756  \
757  if (link->type != out_link->type || \
758  out_link->in_ ## list->nb == 1) \
759  continue; \
760  fmts = out_link->in_ ## list; \
761  \
762  if (!out_link->in_ ## list->nb) { \
763  add_format(&out_link->in_ ##list, fmt); \
764  ret = 1; \
765  break; \
766  } \
767  \
768  for (k = 0; k < out_link->in_ ## list->nb; k++) \
769  if (fmts->var[k] == fmt) { \
770  fmts->var[0] = fmt; \
771  fmts->nb = 1; \
772  ret = 1; \
773  break; \
774  } \
775  } \
776  } \
777 } while (0)
778 
780 {
781  int i, j, k, ret = 0;
782 
784  nb_formats, ff_add_format);
785  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
786  nb_formats, ff_add_format);
787 
788  /* reduce channel layouts */
789  for (i = 0; i < filter->nb_inputs; i++) {
790  AVFilterLink *inlink = filter->inputs[i];
791  uint64_t fmt;
792 
793  if (!inlink->out_channel_layouts ||
795  continue;
796  fmt = inlink->out_channel_layouts->channel_layouts[0];
797 
798  for (j = 0; j < filter->nb_outputs; j++) {
799  AVFilterLink *outlink = filter->outputs[j];
801 
802  fmts = outlink->in_channel_layouts;
803  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
804  continue;
805 
806  if (fmts->all_layouts &&
807  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
808  /* Turn the infinite list into a singleton */
809  fmts->all_layouts = fmts->all_counts = 0;
811  break;
812  }
813 
814  for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
815  if (fmts->channel_layouts[k] == fmt) {
816  fmts->channel_layouts[0] = fmt;
817  fmts->nb_channel_layouts = 1;
818  ret = 1;
819  break;
820  }
821  }
822  }
823  }
824 
825  return ret;
826 }
827 
828 static void reduce_formats(AVFilterGraph *graph)
829 {
830  int i, reduced;
831 
832  do {
833  reduced = 0;
834 
835  for (i = 0; i < graph->nb_filters; i++)
836  reduced |= reduce_formats_on_filter(graph->filters[i]);
837  } while (reduced);
838 }
839 
841 {
842  AVFilterLink *link = NULL;
843  int sample_rate;
844  int i, j;
845 
846  for (i = 0; i < filter->nb_inputs; i++) {
847  link = filter->inputs[i];
848 
849  if (link->type == AVMEDIA_TYPE_AUDIO &&
850  link->out_samplerates->nb_formats== 1)
851  break;
852  }
853  if (i == filter->nb_inputs)
854  return;
855 
856  sample_rate = link->out_samplerates->formats[0];
857 
858  for (i = 0; i < filter->nb_outputs; i++) {
859  AVFilterLink *outlink = filter->outputs[i];
860  int best_idx, best_diff = INT_MAX;
861 
862  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
863  outlink->in_samplerates->nb_formats < 2)
864  continue;
865 
866  for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
867  int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
868 
869  if (diff < best_diff) {
870  best_diff = diff;
871  best_idx = j;
872  }
873  }
874  FFSWAP(int, outlink->in_samplerates->formats[0],
875  outlink->in_samplerates->formats[best_idx]);
876  }
877 }
878 
879 static void swap_samplerates(AVFilterGraph *graph)
880 {
881  int i;
882 
883  for (i = 0; i < graph->nb_filters; i++)
885 }
886 
887 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
888 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
889 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
890 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
891 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
892 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
893 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
894 
895 /* allowable substitutions for channel pairs when comparing layouts,
896  * ordered by priority for both values */
897 static const uint64_t ch_subst[][2] = {
919 };
920 
922 {
923  AVFilterLink *link = NULL;
924  int i, j, k;
925 
926  for (i = 0; i < filter->nb_inputs; i++) {
927  link = filter->inputs[i];
928 
929  if (link->type == AVMEDIA_TYPE_AUDIO &&
931  break;
932  }
933  if (i == filter->nb_inputs)
934  return;
935 
936  for (i = 0; i < filter->nb_outputs; i++) {
937  AVFilterLink *outlink = filter->outputs[i];
938  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
939 
940  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
942  continue;
943 
944  for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
945  uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
946  uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
947  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
948  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
949  int count_diff = out_channels - in_channels;
950  int matched_channels, extra_channels;
951  int score = 100000;
952 
953  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
954  /* Compute score in case the input or output layout encodes
955  a channel count; in this case the score is not altered by
956  the computation afterwards, as in_chlayout and
957  out_chlayout have both been set to 0 */
958  if (FF_LAYOUT2COUNT(in_chlayout))
959  in_channels = FF_LAYOUT2COUNT(in_chlayout);
960  if (FF_LAYOUT2COUNT(out_chlayout))
961  out_channels = FF_LAYOUT2COUNT(out_chlayout);
962  score -= 10000 + FFABS(out_channels - in_channels) +
963  (in_channels > out_channels ? 10000 : 0);
964  in_chlayout = out_chlayout = 0;
965  /* Let the remaining computation run, even if the score
966  value is not altered */
967  }
968 
969  /* channel substitution */
970  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
971  uint64_t cmp0 = ch_subst[k][0];
972  uint64_t cmp1 = ch_subst[k][1];
973  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
974  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
975  in_chlayout &= ~cmp0;
976  out_chlayout &= ~cmp1;
977  /* add score for channel match, minus a deduction for
978  having to do the substitution */
979  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
980  }
981  }
982 
983  /* no penalty for LFE channel mismatch */
984  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
985  (out_chlayout & AV_CH_LOW_FREQUENCY))
986  score += 10;
987  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
988  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
989 
990  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
991  out_chlayout);
992  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
993  (~in_chlayout));
994  score += 10 * matched_channels - 5 * extra_channels;
995 
996  if (score > best_score ||
997  (count_diff < best_count_diff && score == best_score)) {
998  best_score = score;
999  best_idx = j;
1000  best_count_diff = count_diff;
1001  }
1002  }
1003  av_assert0(best_idx >= 0);
1004  FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1005  outlink->in_channel_layouts->channel_layouts[best_idx]);
1006  }
1007 
1008 }
1009 
1011 {
1012  int i;
1013 
1014  for (i = 0; i < graph->nb_filters; i++)
1016 }
1017 
1019 {
1020  AVFilterLink *link = NULL;
1021  int format, bps;
1022  int i, j;
1023 
1024  for (i = 0; i < filter->nb_inputs; i++) {
1025  link = filter->inputs[i];
1026 
1027  if (link->type == AVMEDIA_TYPE_AUDIO &&
1028  link->out_formats->nb_formats == 1)
1029  break;
1030  }
1031  if (i == filter->nb_inputs)
1032  return;
1033 
1034  format = link->out_formats->formats[0];
1035  bps = av_get_bytes_per_sample(format);
1036 
1037  for (i = 0; i < filter->nb_outputs; i++) {
1038  AVFilterLink *outlink = filter->outputs[i];
1039  int best_idx = -1, best_score = INT_MIN;
1040 
1041  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1042  outlink->in_formats->nb_formats < 2)
1043  continue;
1044 
1045  for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1046  int out_format = outlink->in_formats->formats[j];
1047  int out_bps = av_get_bytes_per_sample(out_format);
1048  int score;
1049 
1050  if (av_get_packed_sample_fmt(out_format) == format ||
1051  av_get_planar_sample_fmt(out_format) == format) {
1052  best_idx = j;
1053  break;
1054  }
1055 
1056  /* for s32 and float prefer double to prevent loss of information */
1057  if (bps == 4 && out_bps == 8) {
1058  best_idx = j;
1059  break;
1060  }
1061 
1062  /* prefer closest higher or equal bps */
1063  score = -abs(out_bps - bps);
1064  if (out_bps >= bps)
1065  score += INT_MAX/2;
1066 
1067  if (score > best_score) {
1068  best_score = score;
1069  best_idx = j;
1070  }
1071  }
1072  av_assert0(best_idx >= 0);
1073  FFSWAP(int, outlink->in_formats->formats[0],
1074  outlink->in_formats->formats[best_idx]);
1075  }
1076 }
1077 
1078 static void swap_sample_fmts(AVFilterGraph *graph)
1079 {
1080  int i;
1081 
1082  for (i = 0; i < graph->nb_filters; i++)
1084 
1085 }
1086 
1087 static int pick_formats(AVFilterGraph *graph)
1088 {
1089  int i, j, ret;
1090  int change;
1091 
1092  do{
1093  change = 0;
1094  for (i = 0; i < graph->nb_filters; i++) {
1095  AVFilterContext *filter = graph->filters[i];
1096  if (filter->nb_inputs){
1097  for (j = 0; j < filter->nb_inputs; j++){
1098  if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1099  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1100  return ret;
1101  change = 1;
1102  }
1103  }
1104  }
1105  if (filter->nb_outputs){
1106  for (j = 0; j < filter->nb_outputs; j++){
1107  if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1108  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1109  return ret;
1110  change = 1;
1111  }
1112  }
1113  }
1114  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1115  for (j = 0; j < filter->nb_outputs; j++) {
1116  if(filter->outputs[j]->format<0) {
1117  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1118  return ret;
1119  change = 1;
1120  }
1121  }
1122  }
1123  }
1124  }while(change);
1125 
1126  for (i = 0; i < graph->nb_filters; i++) {
1127  AVFilterContext *filter = graph->filters[i];
1128 
1129  for (j = 0; j < filter->nb_inputs; j++)
1130  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1131  return ret;
1132  for (j = 0; j < filter->nb_outputs; j++)
1133  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1134  return ret;
1135  }
1136  return 0;
1137 }
1138 
1139 /**
1140  * Configure the formats of all the links in the graph.
1141  */
1142 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1143 {
1144  int ret;
1145 
1146  /* find supported formats from sub-filters, and merge along links */
1147  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1148  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1149  if (ret < 0)
1150  return ret;
1151 
1152  /* Once everything is merged, it's possible that we'll still have
1153  * multiple valid media format choices. We try to minimize the amount
1154  * of format conversion inside filters */
1155  reduce_formats(graph);
1156 
1157  /* for audio filters, ensure the best format, sample rate and channel layout
1158  * is selected */
1159  swap_sample_fmts(graph);
1160  swap_samplerates(graph);
1161  swap_channel_layouts(graph);
1162 
1163  if ((ret = pick_formats(graph)) < 0)
1164  return ret;
1165 
1166  return 0;
1167 }
1168 
1170  AVClass *log_ctx)
1171 {
1172  unsigned i, j;
1173  int sink_links_count = 0, n = 0;
1174  AVFilterContext *f;
1175  AVFilterLink **sinks;
1176 
1177  for (i = 0; i < graph->nb_filters; i++) {
1178  f = graph->filters[i];
1179  for (j = 0; j < f->nb_inputs; j++) {
1180  f->inputs[j]->graph = graph;
1181  f->inputs[j]->age_index = -1;
1182  }
1183  for (j = 0; j < f->nb_outputs; j++) {
1184  f->outputs[j]->graph = graph;
1185  f->outputs[j]->age_index= -1;
1186  }
1187  if (!f->nb_outputs) {
1188  if (f->nb_inputs > INT_MAX - sink_links_count)
1189  return AVERROR(EINVAL);
1190  sink_links_count += f->nb_inputs;
1191  }
1192  }
1193  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1194  if (!sinks)
1195  return AVERROR(ENOMEM);
1196  for (i = 0; i < graph->nb_filters; i++) {
1197  f = graph->filters[i];
1198  if (!f->nb_outputs) {
1199  for (j = 0; j < f->nb_inputs; j++) {
1200  sinks[n] = f->inputs[j];
1201  f->inputs[j]->age_index = n++;
1202  }
1203  }
1204  }
1205  av_assert0(n == sink_links_count);
1206  graph->sink_links = sinks;
1207  graph->sink_links_count = sink_links_count;
1208  return 0;
1209 }
1210 
1211 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1212 {
1213  AVFilterContext *f;
1214  int i, j, ret;
1215  int fifo_count = 0;
1216 
1217  for (i = 0; i < graph->nb_filters; i++) {
1218  f = graph->filters[i];
1219 
1220  for (j = 0; j < f->nb_inputs; j++) {
1221  AVFilterLink *link = f->inputs[j];
1222  AVFilterContext *fifo_ctx;
1223  AVFilter *fifo;
1224  char name[32];
1225 
1226  if (!link->dstpad->needs_fifo)
1227  continue;
1228 
1229  fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1230  avfilter_get_by_name("fifo") :
1231  avfilter_get_by_name("afifo");
1232 
1233  snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
1234 
1235  ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1236  NULL, graph);
1237  if (ret < 0)
1238  return ret;
1239 
1240  ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1241  if (ret < 0)
1242  return ret;
1243  }
1244  }
1245 
1246  return 0;
1247 }
1248 
1249 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1250 {
1251  int ret;
1252 
1253  if ((ret = graph_check_validity(graphctx, log_ctx)))
1254  return ret;
1255  if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1256  return ret;
1257  if ((ret = graph_config_formats(graphctx, log_ctx)))
1258  return ret;
1259  if ((ret = graph_config_links(graphctx, log_ctx)))
1260  return ret;
1261  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1262  return ret;
1263 
1264  return 0;
1265 }
1266 
1267 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1268 {
1269  int i, r = AVERROR(ENOSYS);
1270 
1271  if (!graph)
1272  return r;
1273 
1274  if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1275  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1276  if (r != AVERROR(ENOSYS))
1277  return r;
1278  }
1279 
1280  if (res_len && res)
1281  res[0] = 0;
1282 
1283  for (i = 0; i < graph->nb_filters; i++) {
1284  AVFilterContext *filter = graph->filters[i];
1285  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1286  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1287  if (r != AVERROR(ENOSYS)) {
1288  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1289  return r;
1290  }
1291  }
1292  }
1293 
1294  return r;
1295 }
1296 
1297 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1298 {
1299  int i;
1300 
1301  if(!graph)
1302  return 0;
1303 
1304  for (i = 0; i < graph->nb_filters; i++) {
1305  AVFilterContext *filter = graph->filters[i];
1306  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1307  AVFilterCommand **queue = &filter->command_queue, *next;
1308  while (*queue && (*queue)->time <= ts)
1309  queue = &(*queue)->next;
1310  next = *queue;
1311  *queue = av_mallocz(sizeof(AVFilterCommand));
1312  (*queue)->command = av_strdup(command);
1313  (*queue)->arg = av_strdup(arg);
1314  (*queue)->time = ts;
1315  (*queue)->flags = flags;
1316  (*queue)->next = next;
1317  if(flags & AVFILTER_CMD_FLAG_ONE)
1318  return 0;
1319  }
1320  }
1321 
1322  return 0;
1323 }
1324 
1325 static void heap_bubble_up(AVFilterGraph *graph,
1326  AVFilterLink *link, int index)
1327 {
1328  AVFilterLink **links = graph->sink_links;
1329 
1330  av_assert0(index >= 0);
1331 
1332  while (index) {
1333  int parent = (index - 1) >> 1;
1334  if (links[parent]->current_pts >= link->current_pts)
1335  break;
1336  links[index] = links[parent];
1337  links[index]->age_index = index;
1338  index = parent;
1339  }
1340  links[index] = link;
1341  link->age_index = index;
1342 }
1343 
1344 static void heap_bubble_down(AVFilterGraph *graph,
1345  AVFilterLink *link, int index)
1346 {
1347  AVFilterLink **links = graph->sink_links;
1348 
1349  av_assert0(index >= 0);
1350 
1351  while (1) {
1352  int child = 2 * index + 1;
1353  if (child >= graph->sink_links_count)
1354  break;
1355  if (child + 1 < graph->sink_links_count &&
1356  links[child + 1]->current_pts < links[child]->current_pts)
1357  child++;
1358  if (link->current_pts < links[child]->current_pts)
1359  break;
1360  links[index] = links[child];
1361  links[index]->age_index = index;
1362  index = child;
1363  }
1364  links[index] = link;
1365  link->age_index = index;
1366 }
1367 
1369 {
1370  heap_bubble_up (graph, link, link->age_index);
1371  heap_bubble_down(graph, link, link->age_index);
1372 }
1373 
1374 
1376 {
1377  while (graph->sink_links_count) {
1378  AVFilterLink *oldest = graph->sink_links[0];
1379  int r = ff_request_frame(oldest);
1380  if (r != AVERROR_EOF)
1381  return r;
1382  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1383  oldest->dst ? oldest->dst->name : "unknown",
1384  oldest->dstpad ? oldest->dstpad->name : "unknown");
1385  /* EOF: remove the link from the heap */
1386  if (oldest->age_index < --graph->sink_links_count)
1387  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1388  oldest->age_index);
1389  oldest->age_index = -1;
1390  }
1391  return AVERROR_EOF;
1392 }
AVFilterContext ** filters
Definition: avfilter.h:1173
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:523
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:1241
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:622
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2129
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:1196
static void swap_samplerates(AVFilterGraph *graph)
AVOption.
Definition: opt.h:255
static void swap_sample_fmts(AVFilterGraph *graph)
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:723
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:62
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:1362
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1178
static const uint64_t ch_subst[][2]
const char * b
Definition: vf_curves.c:109
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:72
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:593
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:1178
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:628
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:656
#define OFFSET(x)
Definition: avfiltergraph.c:40
const char * name
Pad name.
Definition: internal.h:67
#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format)
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
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:641
char * name
name of this filter instance
Definition: avfilter.h:638
#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:1229
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:647
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
#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:1203
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:222
#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:63
#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:336
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:61
unsigned refcount
number of references to this list
Definition: formats.h:68
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:640
#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:542
#define FLAGS
Definition: avfiltergraph.c:41
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:329
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
const AVClass * av_class
Definition: avfilter.h:1168
unsigned nb_outputs
number of output pads
Definition: avfilter.h:652
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
const char * r
Definition: vf_curves.c:107
#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:323
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)
AVFilterLink ** sink_links
Private fields.
Definition: avfilter.h:1240
#define CH_DIRECT_PAIR
#define fail()
Definition: checkasm.h:57
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:487
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:71
audio channel layout utility functions
static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
unsigned nb_inputs
number of input pads
Definition: avfilter.h:645
static void swap_sample_fmts_on_filter(AVFilterContext *filter)
struct AVFilterCommand * next
Definition: internal.h:49
#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
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)
Definition: common.h:61
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:963
#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:385
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:885
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:185
void ff_graph_thread_free(AVFilterGraph *graph)
Definition: avfiltergraph.c:64
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:571
sample_rate
#define AV_BPRINT_SIZE_AUTOMATIC
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:59
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:1208
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
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:765
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:463
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:460
GLint GLenum type
Definition: opengl_enc.c:105
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:470
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:964
#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:458
const char * name
Filter name.
Definition: avfilter.h:474
unsigned nb_filters
Definition: avfilter.h:1175
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:379
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.
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)
static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
#define MERGE_DISPATCH(field, statement)
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:79
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
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:681
static void reduce_formats(AVFilterGraph *graph)
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:1335
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:2408
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:1231
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:158
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
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:633
#define av_freep(p)
#define CH_SIDE_PAIR
double time
time expressed in seconds
Definition: internal.h:45
int needs_fifo
The filter expects a fifo to be inserted on its input link, typically because it has a delay...
Definition: internal.h:144
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:343
#define FFSWAP(type, a, b)
Definition: common.h:69
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:2050
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:61
#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:636
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:530
unsigned disable_auto_convert
Definition: avfilter.h:1243
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