FFmpeg  4.4.6
avfiltergraph.c
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1 /*
2  * filter graphs
3  * Copyright (c) 2008 Vitor Sessak
4  * Copyright (c) 2007 Bobby Bingham
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 
25 #include <string.h>
26 
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/bprint.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 
36 #define FF_INTERNAL_FIELDS 1
37 #include "framequeue.h"
38 
39 #include "avfilter.h"
40 #include "buffersink.h"
41 #include "formats.h"
42 #include "internal.h"
43 #include "thread.h"
44 
45 #define OFFSET(x) offsetof(AVFilterGraph, x)
46 #define F AV_OPT_FLAG_FILTERING_PARAM
47 #define V AV_OPT_FLAG_VIDEO_PARAM
48 #define A AV_OPT_FLAG_AUDIO_PARAM
49 static const AVOption filtergraph_options[] = {
50  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
51  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, F|V|A, "thread_type" },
52  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = F|V|A, .unit = "thread_type" },
53  { "threads", "Maximum number of threads", OFFSET(nb_threads),
54  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, F|V|A },
55  {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
56  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|V },
57  {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
58  AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|A },
59  { NULL },
60 };
61 
62 static const AVClass filtergraph_class = {
63  .class_name = "AVFilterGraph",
64  .item_name = av_default_item_name,
65  .version = LIBAVUTIL_VERSION_INT,
66  .option = filtergraph_options,
67  .category = AV_CLASS_CATEGORY_FILTER,
68 };
69 
70 #if !HAVE_THREADS
72 {
73 }
74 
76 {
77  graph->thread_type = 0;
78  graph->nb_threads = 1;
79  return 0;
80 }
81 #endif
82 
84 {
85  AVFilterGraph *ret = av_mallocz(sizeof(*ret));
86  if (!ret)
87  return NULL;
88 
89  ret->internal = av_mallocz(sizeof(*ret->internal));
90  if (!ret->internal) {
91  av_freep(&ret);
92  return NULL;
93  }
94 
98 
99  return ret;
100 }
101 
103 {
104  int i, j;
105  for (i = 0; i < graph->nb_filters; i++) {
106  if (graph->filters[i] == filter) {
107  FFSWAP(AVFilterContext*, graph->filters[i],
108  graph->filters[graph->nb_filters - 1]);
109  graph->nb_filters--;
110  filter->graph = NULL;
111  for (j = 0; j<filter->nb_outputs; j++)
112  if (filter->outputs[j])
113  filter->outputs[j]->graph = NULL;
114 
115  return;
116  }
117  }
118 }
119 
121 {
122  if (!*graph)
123  return;
124 
125  while ((*graph)->nb_filters)
126  avfilter_free((*graph)->filters[0]);
127 
128  ff_graph_thread_free(*graph);
129 
130  av_freep(&(*graph)->sink_links);
131 
132  av_freep(&(*graph)->scale_sws_opts);
133  av_freep(&(*graph)->aresample_swr_opts);
134 #if FF_API_LAVR_OPTS
135  av_freep(&(*graph)->resample_lavr_opts);
136 #endif
137  av_freep(&(*graph)->filters);
138  av_freep(&(*graph)->internal);
139  av_freep(graph);
140 }
141 
143  const char *name, const char *args, void *opaque,
144  AVFilterGraph *graph_ctx)
145 {
146  int ret;
147 
148  *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
149  if (!*filt_ctx)
150  return AVERROR(ENOMEM);
151 
152  ret = avfilter_init_str(*filt_ctx, args);
153  if (ret < 0)
154  goto fail;
155 
156  return 0;
157 
158 fail:
159  if (*filt_ctx)
160  avfilter_free(*filt_ctx);
161  *filt_ctx = NULL;
162  return ret;
163 }
164 
166 {
167  graph->disable_auto_convert = flags;
168 }
169 
171  const AVFilter *filter,
172  const char *name)
173 {
175 
176  if (graph->thread_type && !graph->internal->thread_execute) {
177  if (graph->execute) {
178  graph->internal->thread_execute = graph->execute;
179  } else {
180  int ret = ff_graph_thread_init(graph);
181  if (ret < 0) {
182  av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret));
183  return NULL;
184  }
185  }
186  }
187 
189  if (!s)
190  return NULL;
191 
192  filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
193  if (!filters) {
194  avfilter_free(s);
195  return NULL;
196  }
197 
198  graph->filters = filters;
199  graph->filters[graph->nb_filters++] = s;
200 
201  s->graph = graph;
202 
203  return s;
204 }
205 
206 /**
207  * Check for the validity of graph.
208  *
209  * A graph is considered valid if all its input and output pads are
210  * connected.
211  *
212  * @return >= 0 in case of success, a negative value otherwise
213  */
214 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
215 {
217  int i, j;
218 
219  for (i = 0; i < graph->nb_filters; i++) {
220  const AVFilterPad *pad;
221  filt = graph->filters[i];
222 
223  for (j = 0; j < filt->nb_inputs; j++) {
224  if (!filt->inputs[j] || !filt->inputs[j]->src) {
225  pad = &filt->input_pads[j];
226  av_log(log_ctx, AV_LOG_ERROR,
227  "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
228  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
229  return AVERROR(EINVAL);
230  }
231  }
232 
233  for (j = 0; j < filt->nb_outputs; j++) {
234  if (!filt->outputs[j] || !filt->outputs[j]->dst) {
235  pad = &filt->output_pads[j];
236  av_log(log_ctx, AV_LOG_ERROR,
237  "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
238  pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
239  return AVERROR(EINVAL);
240  }
241  }
242  }
243 
244  return 0;
245 }
246 
247 /**
248  * Configure all the links of graphctx.
249  *
250  * @return >= 0 in case of success, a negative value otherwise
251  */
252 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
253 {
255  int i, ret;
256 
257  for (i = 0; i < graph->nb_filters; i++) {
258  filt = graph->filters[i];
259 
260  if (!filt->nb_outputs) {
261  if ((ret = avfilter_config_links(filt)))
262  return ret;
263  }
264  }
265 
266  return 0;
267 }
268 
269 static int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
270 {
272  AVFilterLink *l;
273  unsigned i, j;
274  int ret;
275 
276  for (i = 0; i < graph->nb_filters; i++) {
277  f = graph->filters[i];
278  for (j = 0; j < f->nb_outputs; j++) {
279  l = f->outputs[j];
280  if (l->type == AVMEDIA_TYPE_VIDEO) {
281  ret = av_image_check_size2(l->w, l->h, INT64_MAX, l->format, 0, f);
282  if (ret < 0)
283  return ret;
284  }
285  }
286  }
287  return 0;
288 }
289 
291 {
292  int i;
293 
294  for (i = 0; i < graph->nb_filters; i++)
295  if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
296  return graph->filters[i];
297 
298  return NULL;
299 }
300 
302 {
303  if (!l)
304  return;
305  if (l->nb_channel_layouts) {
306  if (l->all_layouts || l->all_counts)
307  av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
308  l->all_layouts = l->all_counts = 0;
309  } else {
310  if (l->all_counts && !l->all_layouts)
311  av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
312  l->all_layouts = 1;
313  }
314 }
315 
317 {
318  int ret;
319 
320  switch (link->type) {
321 
322  case AVMEDIA_TYPE_VIDEO:
323  if ((ret = ff_formats_check_pixel_formats(log, cfg->formats)) < 0)
324  return ret;
325  break;
326 
327  case AVMEDIA_TYPE_AUDIO:
328  if ((ret = ff_formats_check_sample_formats(log, cfg->formats)) < 0 ||
329  (ret = ff_formats_check_sample_rates(log, cfg->samplerates)) < 0 ||
330  (ret = ff_formats_check_channel_layouts(log, cfg->channel_layouts)) < 0)
331  return ret;
332  break;
333 
334  default:
335  av_assert0(!"reached");
336  }
337  return 0;
338 }
339 
340 /**
341  * Check the validity of the formats / etc. lists set by query_formats().
342  *
343  * In particular, check they do not contain any redundant element.
344  */
346 {
347  unsigned i;
348  int ret;
349 
350  for (i = 0; i < ctx->nb_inputs; i++) {
351  ret = filter_link_check_formats(ctx, ctx->inputs[i], &ctx->inputs[i]->outcfg);
352  if (ret < 0)
353  return ret;
354  }
355  for (i = 0; i < ctx->nb_outputs; i++) {
356  ret = filter_link_check_formats(ctx, ctx->outputs[i], &ctx->outputs[i]->incfg);
357  if (ret < 0)
358  return ret;
359  }
360  return 0;
361 }
362 
364 {
365  int ret, i;
367  AVFilterChannelLayouts *chlayouts;
368  AVFilterFormats *samplerates;
369  enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
370  ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
372 
373  if ((ret = ctx->filter->query_formats(ctx)) < 0) {
374  if (ret != AVERROR(EAGAIN))
375  av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
376  ctx->name, av_err2str(ret));
377  return ret;
378  }
379  ret = filter_check_formats(ctx);
380  if (ret < 0)
381  return ret;
382 
383  for (i = 0; i < ctx->nb_inputs; i++)
384  sanitize_channel_layouts(ctx, ctx->inputs[i]->outcfg.channel_layouts);
385  for (i = 0; i < ctx->nb_outputs; i++)
386  sanitize_channel_layouts(ctx, ctx->outputs[i]->incfg.channel_layouts);
387 
389  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
390  return ret;
391  if (type == AVMEDIA_TYPE_AUDIO) {
392  samplerates = ff_all_samplerates();
393  if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
394  return ret;
395  chlayouts = ff_all_channel_layouts();
396  if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
397  return ret;
398  }
399  return 0;
400 }
401 
403 {
404  int i;
405 
406  for (i = 0; i < f->nb_inputs; i++) {
407  if (!f->inputs[i]->outcfg.formats)
408  return 0;
409  if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
410  !(f->inputs[i]->outcfg.samplerates &&
411  f->inputs[i]->outcfg.channel_layouts))
412  return 0;
413  }
414  for (i = 0; i < f->nb_outputs; i++) {
415  if (!f->outputs[i]->incfg.formats)
416  return 0;
417  if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
418  !(f->outputs[i]->incfg.samplerates &&
419  f->outputs[i]->incfg.channel_layouts))
420  return 0;
421  }
422  return 1;
423 }
424 
425 /**
426  * Perform one round of query_formats() and merging formats lists on the
427  * filter graph.
428  * @return >=0 if all links formats lists could be queried and merged;
429  * AVERROR(EAGAIN) some progress was made in the queries or merging
430  * and a later call may succeed;
431  * AVERROR(EIO) (may be changed) plus a log message if no progress
432  * was made and the negotiation is stuck;
433  * a negative error code if some other error happened
434  */
435 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
436 {
437  int i, j, ret;
438  int scaler_count = 0, resampler_count = 0;
439  int count_queried = 0; /* successful calls to query_formats() */
440  int count_merged = 0; /* successful merge of formats lists */
441  int count_already_merged = 0; /* lists already merged */
442  int count_delayed = 0; /* lists that need to be merged later */
443 
444  for (i = 0; i < graph->nb_filters; i++) {
445  AVFilterContext *f = graph->filters[i];
446  if (formats_declared(f))
447  continue;
448  if (f->filter->query_formats)
449  ret = filter_query_formats(f);
450  else
452  if (ret < 0 && ret != AVERROR(EAGAIN))
453  return ret;
454  /* note: EAGAIN could indicate a partial success, not counted yet */
455  count_queried += ret >= 0;
456  }
457 
458  /* go through and merge as many format lists as possible */
459  for (i = 0; i < graph->nb_filters; i++) {
460  AVFilterContext *filter = graph->filters[i];
461 
462  for (j = 0; j < filter->nb_inputs; j++) {
463  AVFilterLink *link = filter->inputs[j];
464  int convert_needed = 0;
465 
466  if (!link)
467  continue;
468 
469  if (link->incfg.formats != link->outcfg.formats
470  && link->incfg.formats && link->outcfg.formats)
471  if (!ff_can_merge_formats(link->incfg.formats, link->outcfg.formats,
472  link->type))
473  convert_needed = 1;
474  if (link->type == AVMEDIA_TYPE_AUDIO) {
475  if (link->incfg.samplerates != link->outcfg.samplerates
476  && link->incfg.samplerates && link->outcfg.samplerates)
478  link->outcfg.samplerates))
479  convert_needed = 1;
480  }
481 
482 #define CHECKED_MERGE(field, ...) ((ret = ff_merge_ ## field(__VA_ARGS__)) <= 0)
483 #define MERGE_DISPATCH(field, ...) \
484  if (!(link->incfg.field && link->outcfg.field)) { \
485  count_delayed++; \
486  } else if (link->incfg.field == link->outcfg.field) { \
487  count_already_merged++; \
488  } else if (!convert_needed) { \
489  count_merged++; \
490  if (CHECKED_MERGE(field, __VA_ARGS__)) { \
491  if (ret < 0) \
492  return ret; \
493  convert_needed = 1; \
494  } \
495  }
496 
497  if (link->type == AVMEDIA_TYPE_AUDIO) {
499  link->outcfg.channel_layouts)
500  MERGE_DISPATCH(samplerates, link->incfg.samplerates,
501  link->outcfg.samplerates)
502  }
504  link->outcfg.formats, link->type)
505 #undef MERGE_DISPATCH
506 
507  if (convert_needed) {
509  const AVFilter *filter;
510  AVFilterLink *inlink, *outlink;
511  char inst_name[30];
512 
513  if (graph->disable_auto_convert) {
514  av_log(log_ctx, AV_LOG_ERROR,
515  "The filters '%s' and '%s' do not have a common format "
516  "and automatic conversion is disabled.\n",
517  link->src->name, link->dst->name);
518  return AVERROR(EINVAL);
519  }
520 
521  /* couldn't merge format lists. auto-insert conversion filter */
522  switch (link->type) {
523  case AVMEDIA_TYPE_VIDEO:
524  if (!(filter = avfilter_get_by_name("scale"))) {
525  av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
526  "not present, cannot convert pixel formats.\n");
527  return AVERROR(EINVAL);
528  }
529 
530  snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
531  scaler_count++);
532 
534  inst_name, graph->scale_sws_opts, NULL,
535  graph)) < 0)
536  return ret;
537  break;
538  case AVMEDIA_TYPE_AUDIO:
539  if (!(filter = avfilter_get_by_name("aresample"))) {
540  av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
541  "not present, cannot convert audio formats.\n");
542  return AVERROR(EINVAL);
543  }
544 
545  snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
546  resampler_count++);
548  inst_name, graph->aresample_swr_opts,
549  NULL, graph)) < 0)
550  return ret;
551  break;
552  default:
553  return AVERROR(EINVAL);
554  }
555 
556  if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
557  return ret;
558 
559  if ((ret = filter_query_formats(convert)) < 0)
560  return ret;
561 
562  inlink = convert->inputs[0];
563  outlink = convert->outputs[0];
564  av_assert0( inlink->incfg.formats->refcount > 0);
565  av_assert0( inlink->outcfg.formats->refcount > 0);
566  av_assert0(outlink->incfg.formats->refcount > 0);
567  av_assert0(outlink->outcfg.formats->refcount > 0);
568  if (outlink->type == AVMEDIA_TYPE_AUDIO) {
569  av_assert0( inlink-> incfg.samplerates->refcount > 0);
570  av_assert0( inlink->outcfg.samplerates->refcount > 0);
571  av_assert0(outlink-> incfg.samplerates->refcount > 0);
572  av_assert0(outlink->outcfg.samplerates->refcount > 0);
573  av_assert0( inlink-> incfg.channel_layouts->refcount > 0);
574  av_assert0( inlink->outcfg.channel_layouts->refcount > 0);
575  av_assert0(outlink-> incfg.channel_layouts->refcount > 0);
576  av_assert0(outlink->outcfg.channel_layouts->refcount > 0);
577  }
578  if (CHECKED_MERGE(formats, inlink->incfg.formats,
579  inlink->outcfg.formats, inlink->type) ||
581  outlink->outcfg.formats, outlink->type) ||
582  inlink->type == AVMEDIA_TYPE_AUDIO &&
583  (CHECKED_MERGE(samplerates, inlink->incfg.samplerates,
584  inlink->outcfg.samplerates) ||
586  inlink->outcfg.channel_layouts)) ||
587  outlink->type == AVMEDIA_TYPE_AUDIO &&
588  (CHECKED_MERGE(samplerates, outlink->incfg.samplerates,
589  outlink->outcfg.samplerates) ||
591  outlink->outcfg.channel_layouts))) {
592  if (ret < 0)
593  return ret;
594  av_log(log_ctx, AV_LOG_ERROR,
595  "Impossible to convert between the formats supported by the filter "
596  "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
597  return AVERROR(ENOSYS);
598  }
599  }
600  }
601  }
602 
603  av_log(graph, AV_LOG_DEBUG, "query_formats: "
604  "%d queried, %d merged, %d already done, %d delayed\n",
605  count_queried, count_merged, count_already_merged, count_delayed);
606  if (count_delayed) {
607  AVBPrint bp;
608 
609  /* if count_queried > 0, one filter at least did set its formats,
610  that will give additional information to its neighbour;
611  if count_merged > 0, one pair of formats lists at least was merged,
612  that will give additional information to all connected filters;
613  in both cases, progress was made and a new round must be done */
614  if (count_queried || count_merged)
615  return AVERROR(EAGAIN);
617  for (i = 0; i < graph->nb_filters; i++)
618  if (!formats_declared(graph->filters[i]))
619  av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
620  graph->filters[i]->name);
621  av_log(graph, AV_LOG_ERROR,
622  "The following filters could not choose their formats: %s\n"
623  "Consider inserting the (a)format filter near their input or "
624  "output.\n", bp.str);
625  return AVERROR(EIO);
626  }
627  return 0;
628 }
629 
630 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
631 {
632  int score = 0;
633 
634  if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
635  score ++;
636 
637  if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
638  score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
639  }else
640  score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
641 
644  score += 20;
645 
648  score += 2;
649 
650  return score;
651 }
652 
653 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
654  enum AVSampleFormat src_fmt)
655 {
656  int score1, score2;
657 
658  score1 = get_fmt_score(dst_fmt1, src_fmt);
659  score2 = get_fmt_score(dst_fmt2, src_fmt);
660 
661  return score1 < score2 ? dst_fmt1 : dst_fmt2;
662 }
663 
665 {
666  if (!link || !link->incfg.formats)
667  return 0;
668 
669  if (link->type == AVMEDIA_TYPE_VIDEO) {
670  if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
671  //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
672  int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
673  enum AVPixelFormat best= AV_PIX_FMT_NONE;
674  int i;
675  for (i = 0; i < link->incfg.formats->nb_formats; i++) {
676  enum AVPixelFormat p = link->incfg.formats->formats[i];
677  best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
678  }
679  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
681  av_get_pix_fmt_name(ref->format), has_alpha);
682  link->incfg.formats->formats[0] = best;
683  }
684  } else if (link->type == AVMEDIA_TYPE_AUDIO) {
685  if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
687  int i;
688  for (i = 0; i < link->incfg.formats->nb_formats; i++) {
689  enum AVSampleFormat p = link->incfg.formats->formats[i];
690  best = find_best_sample_fmt_of_2(best, p, ref->format);
691  }
692  av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
694  av_get_sample_fmt_name(ref->format));
695  link->incfg.formats->formats[0] = best;
696  }
697  }
698 
699  link->incfg.formats->nb_formats = 1;
700  link->format = link->incfg.formats->formats[0];
701 
702  if (link->type == AVMEDIA_TYPE_AUDIO) {
703  if (!link->incfg.samplerates->nb_formats) {
704  av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
705  " the link between filters %s and %s.\n", link->src->name,
706  link->dst->name);
707  return AVERROR(EINVAL);
708  }
709  link->incfg.samplerates->nb_formats = 1;
710  link->sample_rate = link->incfg.samplerates->formats[0];
711 
712  if (link->incfg.channel_layouts->all_layouts) {
713  av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
714  " the link between filters %s and %s.\n", link->src->name,
715  link->dst->name);
716  if (!link->incfg.channel_layouts->all_counts)
717  av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
718  "supported, try specifying a channel layout using "
719  "'aformat=channel_layouts=something'.\n");
720  return AVERROR(EINVAL);
721  }
724  if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
725  link->channel_layout = 0;
726  else
728  }
729 
736 
737  return 0;
738 }
739 
740 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
741 do { \
742  for (i = 0; i < filter->nb_inputs; i++) { \
743  AVFilterLink *link = filter->inputs[i]; \
744  fmt_type fmt; \
745  \
746  if (!link->outcfg.list || link->outcfg.list->nb != 1) \
747  continue; \
748  fmt = link->outcfg.list->var[0]; \
749  \
750  for (j = 0; j < filter->nb_outputs; j++) { \
751  AVFilterLink *out_link = filter->outputs[j]; \
752  list_type *fmts; \
753  \
754  if (link->type != out_link->type || \
755  out_link->incfg.list->nb == 1) \
756  continue; \
757  fmts = out_link->incfg.list; \
758  \
759  if (!out_link->incfg.list->nb) { \
760  if ((ret = add_format(&out_link->incfg.list, fmt)) < 0)\
761  return ret; \
762  ret = 1; \
763  break; \
764  } \
765  \
766  for (k = 0; k < out_link->incfg.list->nb; k++) \
767  if (fmts->var[k] == fmt) { \
768  fmts->var[0] = fmt; \
769  fmts->nb = 1; \
770  ret = 1; \
771  break; \
772  } \
773  } \
774  } \
775 } while (0)
776 
778 {
779  int i, j, k, ret = 0;
780 
782  nb_formats, ff_add_format);
783  REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
784  nb_formats, ff_add_format);
785 
786  /* reduce channel layouts */
787  for (i = 0; i < filter->nb_inputs; i++) {
788  AVFilterLink *inlink = filter->inputs[i];
789  uint64_t fmt;
790 
791  if (!inlink->outcfg.channel_layouts ||
793  continue;
794  fmt = inlink->outcfg.channel_layouts->channel_layouts[0];
795 
796  for (j = 0; j < filter->nb_outputs; j++) {
797  AVFilterLink *outlink = filter->outputs[j];
799 
800  fmts = outlink->incfg.channel_layouts;
801  if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
802  continue;
803 
804  if (fmts->all_layouts &&
805  (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
806  /* Turn the infinite list into a singleton */
807  fmts->all_layouts = fmts->all_counts = 0;
808  if (ff_add_channel_layout(&outlink->incfg.channel_layouts, fmt) < 0)
809  ret = 1;
810  break;
811  }
812 
813  for (k = 0; k < outlink->incfg.channel_layouts->nb_channel_layouts; k++) {
814  if (fmts->channel_layouts[k] == fmt) {
815  fmts->channel_layouts[0] = fmt;
816  fmts->nb_channel_layouts = 1;
817  ret = 1;
818  break;
819  }
820  }
821  }
822  }
823 
824  return ret;
825 }
826 
827 static int reduce_formats(AVFilterGraph *graph)
828 {
829  int i, reduced, ret;
830 
831  do {
832  reduced = 0;
833 
834  for (i = 0; i < graph->nb_filters; i++) {
835  if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
836  return ret;
837  reduced |= ret;
838  }
839  } while (reduced);
840 
841  return 0;
842 }
843 
845 {
846  AVFilterLink *link = NULL;
847  int sample_rate;
848  int i, j;
849 
850  for (i = 0; i < filter->nb_inputs; i++) {
851  link = filter->inputs[i];
852 
853  if (link->type == AVMEDIA_TYPE_AUDIO &&
854  link->outcfg.samplerates->nb_formats== 1)
855  break;
856  }
857  if (i == filter->nb_inputs)
858  return;
859 
861 
862  for (i = 0; i < filter->nb_outputs; i++) {
863  AVFilterLink *outlink = filter->outputs[i];
864  int best_idx, best_diff = INT_MAX;
865 
866  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
867  outlink->incfg.samplerates->nb_formats < 2)
868  continue;
869 
870  for (j = 0; j < outlink->incfg.samplerates->nb_formats; j++) {
871  int diff = abs(sample_rate - outlink->incfg.samplerates->formats[j]);
872 
873  av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
874 
875  if (diff < best_diff) {
876  best_diff = diff;
877  best_idx = j;
878  }
879  }
880  FFSWAP(int, outlink->incfg.samplerates->formats[0],
881  outlink->incfg.samplerates->formats[best_idx]);
882  }
883 }
884 
885 static void swap_samplerates(AVFilterGraph *graph)
886 {
887  int i;
888 
889  for (i = 0; i < graph->nb_filters; i++)
891 }
892 
893 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
894 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
895 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
896 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
897 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
898 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
899 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
900 
901 /* allowable substitutions for channel pairs when comparing layouts,
902  * ordered by priority for both values */
903 static const uint64_t ch_subst[][2] = {
925 };
926 
928 {
929  AVFilterLink *link = NULL;
930  int i, j, k;
931 
932  for (i = 0; i < filter->nb_inputs; i++) {
933  link = filter->inputs[i];
934 
935  if (link->type == AVMEDIA_TYPE_AUDIO &&
937  break;
938  }
939  if (i == filter->nb_inputs)
940  return;
941 
942  for (i = 0; i < filter->nb_outputs; i++) {
943  AVFilterLink *outlink = filter->outputs[i];
944  int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
945 
946  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
948  continue;
949 
950  for (j = 0; j < outlink->incfg.channel_layouts->nb_channel_layouts; j++) {
951  uint64_t in_chlayout = link->outcfg.channel_layouts->channel_layouts[0];
952  uint64_t out_chlayout = outlink->incfg.channel_layouts->channel_layouts[j];
953  int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
954  int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
955  int count_diff = out_channels - in_channels;
956  int matched_channels, extra_channels;
957  int score = 100000;
958 
959  if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
960  /* Compute score in case the input or output layout encodes
961  a channel count; in this case the score is not altered by
962  the computation afterwards, as in_chlayout and
963  out_chlayout have both been set to 0 */
964  if (FF_LAYOUT2COUNT(in_chlayout))
965  in_channels = FF_LAYOUT2COUNT(in_chlayout);
966  if (FF_LAYOUT2COUNT(out_chlayout))
967  out_channels = FF_LAYOUT2COUNT(out_chlayout);
968  score -= 10000 + FFABS(out_channels - in_channels) +
969  (in_channels > out_channels ? 10000 : 0);
970  in_chlayout = out_chlayout = 0;
971  /* Let the remaining computation run, even if the score
972  value is not altered */
973  }
974 
975  /* channel substitution */
976  for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
977  uint64_t cmp0 = ch_subst[k][0];
978  uint64_t cmp1 = ch_subst[k][1];
979  if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
980  (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
981  in_chlayout &= ~cmp0;
982  out_chlayout &= ~cmp1;
983  /* add score for channel match, minus a deduction for
984  having to do the substitution */
985  score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
986  }
987  }
988 
989  /* no penalty for LFE channel mismatch */
990  if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
991  (out_chlayout & AV_CH_LOW_FREQUENCY))
992  score += 10;
993  in_chlayout &= ~AV_CH_LOW_FREQUENCY;
994  out_chlayout &= ~AV_CH_LOW_FREQUENCY;
995 
996  matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
997  out_chlayout);
998  extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
999  (~in_chlayout));
1000  score += 10 * matched_channels - 5 * extra_channels;
1001 
1002  if (score > best_score ||
1003  (count_diff < best_count_diff && score == best_score)) {
1004  best_score = score;
1005  best_idx = j;
1006  best_count_diff = count_diff;
1007  }
1008  }
1009  av_assert0(best_idx >= 0);
1010  FFSWAP(uint64_t, outlink->incfg.channel_layouts->channel_layouts[0],
1011  outlink->incfg.channel_layouts->channel_layouts[best_idx]);
1012  }
1013 
1014 }
1015 
1017 {
1018  int i;
1019 
1020  for (i = 0; i < graph->nb_filters; i++)
1022 }
1023 
1025 {
1026  AVFilterLink *link = NULL;
1027  int format, bps;
1028  int i, j;
1029 
1030  for (i = 0; i < filter->nb_inputs; i++) {
1031  link = filter->inputs[i];
1032 
1033  if (link->type == AVMEDIA_TYPE_AUDIO &&
1034  link->outcfg.formats->nb_formats == 1)
1035  break;
1036  }
1037  if (i == filter->nb_inputs)
1038  return;
1039 
1040  format = link->outcfg.formats->formats[0];
1042 
1043  for (i = 0; i < filter->nb_outputs; i++) {
1044  AVFilterLink *outlink = filter->outputs[i];
1045  int best_idx = -1, best_score = INT_MIN;
1046 
1047  if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1048  outlink->incfg.formats->nb_formats < 2)
1049  continue;
1050 
1051  for (j = 0; j < outlink->incfg.formats->nb_formats; j++) {
1052  int out_format = outlink->incfg.formats->formats[j];
1053  int out_bps = av_get_bytes_per_sample(out_format);
1054  int score;
1055 
1056  if (av_get_packed_sample_fmt(out_format) == format ||
1057  av_get_planar_sample_fmt(out_format) == format) {
1058  best_idx = j;
1059  break;
1060  }
1061 
1062  /* for s32 and float prefer double to prevent loss of information */
1063  if (bps == 4 && out_bps == 8) {
1064  best_idx = j;
1065  break;
1066  }
1067 
1068  /* prefer closest higher or equal bps */
1069  score = -abs(out_bps - bps);
1070  if (out_bps >= bps)
1071  score += INT_MAX/2;
1072 
1073  if (score > best_score) {
1074  best_score = score;
1075  best_idx = j;
1076  }
1077  }
1078  av_assert0(best_idx >= 0);
1079  FFSWAP(int, outlink->incfg.formats->formats[0],
1080  outlink->incfg.formats->formats[best_idx]);
1081  }
1082 }
1083 
1084 static void swap_sample_fmts(AVFilterGraph *graph)
1085 {
1086  int i;
1087 
1088  for (i = 0; i < graph->nb_filters; i++)
1090 
1091 }
1092 
1093 static int pick_formats(AVFilterGraph *graph)
1094 {
1095  int i, j, ret;
1096  int change;
1097 
1098  do{
1099  change = 0;
1100  for (i = 0; i < graph->nb_filters; i++) {
1101  AVFilterContext *filter = graph->filters[i];
1102  if (filter->nb_inputs){
1103  for (j = 0; j < filter->nb_inputs; j++){
1104  if (filter->inputs[j]->incfg.formats && filter->inputs[j]->incfg.formats->nb_formats == 1) {
1105  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1106  return ret;
1107  change = 1;
1108  }
1109  }
1110  }
1111  if (filter->nb_outputs){
1112  for (j = 0; j < filter->nb_outputs; j++){
1113  if (filter->outputs[j]->incfg.formats && filter->outputs[j]->incfg.formats->nb_formats == 1) {
1114  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1115  return ret;
1116  change = 1;
1117  }
1118  }
1119  }
1120  if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1121  for (j = 0; j < filter->nb_outputs; j++) {
1122  if (filter->outputs[j]->format<0) {
1123  if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1124  return ret;
1125  change = 1;
1126  }
1127  }
1128  }
1129  }
1130  }while(change);
1131 
1132  for (i = 0; i < graph->nb_filters; i++) {
1133  AVFilterContext *filter = graph->filters[i];
1134 
1135  for (j = 0; j < filter->nb_inputs; j++)
1136  if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1137  return ret;
1138  for (j = 0; j < filter->nb_outputs; j++)
1139  if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1140  return ret;
1141  }
1142  return 0;
1143 }
1144 
1145 /**
1146  * Configure the formats of all the links in the graph.
1147  */
1148 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1149 {
1150  int ret;
1151 
1152  /* find supported formats from sub-filters, and merge along links */
1153  while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1154  av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1155  if (ret < 0)
1156  return ret;
1157 
1158  /* Once everything is merged, it's possible that we'll still have
1159  * multiple valid media format choices. We try to minimize the amount
1160  * of format conversion inside filters */
1161  if ((ret = reduce_formats(graph)) < 0)
1162  return ret;
1163 
1164  /* for audio filters, ensure the best format, sample rate and channel layout
1165  * is selected */
1166  swap_sample_fmts(graph);
1167  swap_samplerates(graph);
1168  swap_channel_layouts(graph);
1169 
1170  if ((ret = pick_formats(graph)) < 0)
1171  return ret;
1172 
1173  return 0;
1174 }
1175 
1177  AVClass *log_ctx)
1178 {
1179  unsigned i, j;
1180  int sink_links_count = 0, n = 0;
1181  AVFilterContext *f;
1182  AVFilterLink **sinks;
1183 
1184  for (i = 0; i < graph->nb_filters; i++) {
1185  f = graph->filters[i];
1186  for (j = 0; j < f->nb_inputs; j++) {
1187  f->inputs[j]->graph = graph;
1188  f->inputs[j]->age_index = -1;
1189  }
1190  for (j = 0; j < f->nb_outputs; j++) {
1191  f->outputs[j]->graph = graph;
1192  f->outputs[j]->age_index= -1;
1193  }
1194  if (!f->nb_outputs) {
1195  if (f->nb_inputs > INT_MAX - sink_links_count)
1196  return AVERROR(EINVAL);
1197  sink_links_count += f->nb_inputs;
1198  }
1199  }
1200  sinks = av_calloc(sink_links_count, sizeof(*sinks));
1201  if (!sinks)
1202  return AVERROR(ENOMEM);
1203  for (i = 0; i < graph->nb_filters; i++) {
1204  f = graph->filters[i];
1205  if (!f->nb_outputs) {
1206  for (j = 0; j < f->nb_inputs; j++) {
1207  sinks[n] = f->inputs[j];
1208  f->inputs[j]->age_index = n++;
1209  }
1210  }
1211  }
1212  av_assert0(n == sink_links_count);
1213  graph->sink_links = sinks;
1214  graph->sink_links_count = sink_links_count;
1215  return 0;
1216 }
1217 
1218 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1219 {
1220  int ret;
1221 
1222  if ((ret = graph_check_validity(graphctx, log_ctx)))
1223  return ret;
1224  if ((ret = graph_config_formats(graphctx, log_ctx)))
1225  return ret;
1226  if ((ret = graph_config_links(graphctx, log_ctx)))
1227  return ret;
1228  if ((ret = graph_check_links(graphctx, log_ctx)))
1229  return ret;
1230  if ((ret = graph_config_pointers(graphctx, log_ctx)))
1231  return ret;
1232 
1233  return 0;
1234 }
1235 
1236 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1237 {
1238  int i, r = AVERROR(ENOSYS);
1239 
1240  if (!graph)
1241  return r;
1242 
1244  r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1245  if (r != AVERROR(ENOSYS))
1246  return r;
1247  }
1248 
1249  if (res_len && res)
1250  res[0] = 0;
1251 
1252  for (i = 0; i < graph->nb_filters; i++) {
1253  AVFilterContext *filter = graph->filters[i];
1254  if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1255  r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1256  if (r != AVERROR(ENOSYS)) {
1257  if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1258  return r;
1259  }
1260  }
1261  }
1262 
1263  return r;
1264 }
1265 
1266 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1267 {
1268  int i;
1269 
1270  if(!graph)
1271  return 0;
1272 
1273  for (i = 0; i < graph->nb_filters; i++) {
1274  AVFilterContext *filter = graph->filters[i];
1275  if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1276  AVFilterCommand **queue = &filter->command_queue, *next;
1277  while (*queue && (*queue)->time <= ts)
1278  queue = &(*queue)->next;
1279  next = *queue;
1280  *queue = av_mallocz(sizeof(AVFilterCommand));
1281  if (!*queue)
1282  return AVERROR(ENOMEM);
1283 
1284  (*queue)->command = av_strdup(command);
1285  (*queue)->arg = av_strdup(arg);
1286  (*queue)->time = ts;
1287  (*queue)->flags = flags;
1288  (*queue)->next = next;
1290  return 0;
1291  }
1292  }
1293 
1294  return 0;
1295 }
1296 
1297 static void heap_bubble_up(AVFilterGraph *graph,
1298  AVFilterLink *link, int index)
1299 {
1300  AVFilterLink **links = graph->sink_links;
1301 
1302  av_assert0(index >= 0);
1303 
1304  while (index) {
1305  int parent = (index - 1) >> 1;
1306  if (links[parent]->current_pts_us >= link->current_pts_us)
1307  break;
1308  links[index] = links[parent];
1309  links[index]->age_index = index;
1310  index = parent;
1311  }
1312  links[index] = link;
1313  link->age_index = index;
1314 }
1315 
1316 static void heap_bubble_down(AVFilterGraph *graph,
1317  AVFilterLink *link, int index)
1318 {
1319  AVFilterLink **links = graph->sink_links;
1320 
1321  av_assert0(index >= 0);
1322 
1323  while (1) {
1324  int child = 2 * index + 1;
1325  if (child >= graph->sink_links_count)
1326  break;
1327  if (child + 1 < graph->sink_links_count &&
1328  links[child + 1]->current_pts_us < links[child]->current_pts_us)
1329  child++;
1330  if (link->current_pts_us < links[child]->current_pts_us)
1331  break;
1332  links[index] = links[child];
1333  links[index]->age_index = index;
1334  index = child;
1335  }
1336  links[index] = link;
1337  link->age_index = index;
1338 }
1339 
1341 {
1342  heap_bubble_up (graph, link, link->age_index);
1343  heap_bubble_down(graph, link, link->age_index);
1344 }
1345 
1347 {
1348  AVFilterLink *oldest = graph->sink_links[0];
1349  int64_t frame_count;
1350  int r;
1351 
1352  while (graph->sink_links_count) {
1353  oldest = graph->sink_links[0];
1354  if (oldest->dst->filter->activate) {
1355  /* For now, buffersink is the only filter implementing activate. */
1358  if (r != AVERROR_EOF)
1359  return r;
1360  } else {
1361  r = ff_request_frame(oldest);
1362  }
1363  if (r != AVERROR_EOF)
1364  break;
1365  av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1366  oldest->dst ? oldest->dst->name : "unknown",
1367  oldest->dstpad ? oldest->dstpad->name : "unknown");
1368  /* EOF: remove the link from the heap */
1369  if (oldest->age_index < --graph->sink_links_count)
1370  heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1371  oldest->age_index);
1372  oldest->age_index = -1;
1373  }
1374  if (!graph->sink_links_count)
1375  return AVERROR_EOF;
1376  av_assert1(!oldest->dst->filter->activate);
1377  av_assert1(oldest->age_index >= 0);
1378  frame_count = oldest->frame_count_out;
1379  while (frame_count == oldest->frame_count_out) {
1380  r = ff_filter_graph_run_once(graph);
1381  if (r == AVERROR(EAGAIN) &&
1382  !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1383  !oldest->status_in)
1384  ff_request_frame(oldest);
1385  else if (r < 0)
1386  return r;
1387  }
1388  return 0;
1389 }
1390 
1392 {
1394  unsigned i;
1395 
1396  av_assert0(graph->nb_filters);
1397  filter = graph->filters[0];
1398  for (i = 1; i < graph->nb_filters; i++)
1399  if (graph->filters[i]->ready > filter->ready)
1400  filter = graph->filters[i];
1401  if (!filter->ready)
1402  return AVERROR(EAGAIN);
1403  return ff_filter_activate(filter);
1404 }
static const char *const format[]
Definition: af_aiir.c:456
static const int8_t filt[NUMTAPS *2]
Definition: af_earwax.c:39
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:663
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:408
int ff_filter_activate(AVFilterContext *filter)
Definition: avfilter.c:1434
Main libavfilter public API header.
#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format)
#define CH_SIDE_PAIR
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
Remove a filter from a graph;.
static int reduce_formats_on_filter(AVFilterContext *filter)
int ff_filter_graph_run_once(AVFilterGraph *graph)
Run one round of processing on a filter graph.
static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
Perform one round of query_formats() and merging formats lists on the filter graph.
static const uint64_t ch_subst[][2]
static void swap_channel_layouts_on_filter(AVFilterContext *filter)
static void swap_sample_fmts(AVFilterGraph *graph)
static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
Configure all the links of graphctx.
#define F
Definition: avfiltergraph.c:46
static void heap_bubble_down(AVFilterGraph *graph, AVFilterLink *link, int index)
static int formats_declared(AVFilterContext *f)
static void heap_bubble_up(AVFilterGraph *graph, AVFilterLink *link, int index)
static void swap_samplerates_on_filter(AVFilterContext *filter)
static int graph_config_pointers(AVFilterGraph *graph, AVClass *log_ctx)
static void swap_channel_layouts(AVFilterGraph *graph)
#define CH_DIRECT_PAIR
static int filter_check_formats(AVFilterContext *ctx)
Check the validity of the formats / etc.
#define CH_WIDE_PAIR
static int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
#define MERGE_DISPATCH(field,...)
static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2, enum AVSampleFormat src_fmt)
#define CH_CENTER_PAIR
static int reduce_formats(AVFilterGraph *graph)
#define A
Definition: avfiltergraph.c:48
static const AVClass filtergraph_class
Definition: avfiltergraph.c:62
void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
Update the position of a link in the age heap.
void ff_graph_thread_free(AVFilterGraph *graph)
Definition: avfiltergraph.c:71
static int filter_link_check_formats(void *log, AVFilterLink *link, AVFilterFormatsConfig *cfg)
static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
static int pick_formats(AVFilterGraph *graph)
#define CHECKED_MERGE(field,...)
#define OFFSET(x)
Definition: avfiltergraph.c:45
static int filter_query_formats(AVFilterContext *ctx)
#define CH_FRONT_PAIR
#define CH_BACK_PAIR
int ff_graph_thread_init(AVFilterGraph *graph)
Definition: avfiltergraph.c:75
static void swap_sample_fmts_on_filter(AVFilterContext *filter)
static int pick_format(AVFilterLink *link, AVFilterLink *ref)
static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
Configure the formats of all the links in the graph.
#define V
Definition: avfiltergraph.c:47
static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
Check for the validity of graph.
static const AVOption filtergraph_options[]
Definition: avfiltergraph.c:49
static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
static void swap_samplerates(AVFilterGraph *graph)
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
#define AV_BPRINT_SIZE_AUTOMATIC
memory buffer sink API for audio and video
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
#define f(width, name)
Definition: cbs_vp9.c:255
static av_always_inline void filter(int16_t *output, ptrdiff_t out_stride, const int16_t *low, ptrdiff_t low_stride, const int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhddsp.c:27
audio channel layout utility functions
#define fail()
Definition: checkasm.h:133
#define FFSWAP(type, a, b)
Definition: common.h:108
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
#define abs(x)
Definition: cuda_runtime.h:35
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:114
static void convert(float y, float u, float v, float *b, float *g, float *r)
Definition: exr.c:970
sample_rate
int ff_can_merge_samplerates(const AVFilterFormats *a, const AVFilterFormats *b)
Definition: formats.c:157
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:338
int ff_formats_check_sample_rates(void *log, const AVFilterFormats *fmts)
Check that fmts is a valid sample rates list.
Definition: formats.c:696
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:593
AVFilterFormats * ff_all_formats(enum AVMediaType type)
Return a list of all formats supported by FFmpeg for the given media type.
Definition: formats.c:345
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:587
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:332
void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
Remove a reference to a channel layouts list.
Definition: formats.c:508
int ff_can_merge_formats(const AVFilterFormats *a, const AVFilterFormats *b, enum AVMediaType type)
Check the formats/samplerates lists for compatibility for merging without actually merging.
Definition: formats.c:134
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:427
int ff_formats_check_pixel_formats(void *log, const AVFilterFormats *fmts)
Check that fmts is a valid pixel formats list.
Definition: formats.c:686
int ff_formats_check_sample_formats(void *log, const AVFilterFormats *fmts)
Check that fmts is a valid sample formats list.
Definition: formats.c:691
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:575
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:503
int ff_formats_check_channel_layouts(void *log, const AVFilterChannelLayouts *fmts)
Check that fmts is a valid channel layouts list.
Definition: formats.c:710
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates.
Definition: formats.c:568
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:421
#define FF_LAYOUT2COUNT(l)
Decode a channel count encoded as a channel layout.
Definition: formats.h:109
void ff_framequeue_global_init(FFFrameQueueGlobal *fqg)
Init a global structure.
Definition: framequeue.c:30
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1358
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
@ AV_OPT_TYPE_FLAGS
Definition: opt.h:224
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
#define AV_CH_BACK_CENTER
#define AV_CH_FRONT_CENTER
#define AV_CH_LOW_FREQUENCY
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:140
#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:89
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:940
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:241
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:760
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
Check validity and configure all the links and formats in the graph.
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.
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:83
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:540
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:336
AVFilterContext * avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name)
Create a new filter instance in a filter 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.
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:278
int avfilter_graph_request_oldest(AVFilterGraph *graph)
Request a frame on the oldest sink link.
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.
#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:701
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: allfilters.c:545
#define AVFILTER_CMD_FLAG_FAST
Only execute command when its fast (like a video out that supports contrast adjustment in hw)
Definition: avfilter.h:702
void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
Enable or disable automatic format conversion inside the graph.
AVFilterContext * avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
Get a filter instance identified by instance name from graph.
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:134
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
AVMediaType
Definition: avutil.h:199
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:71
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of a plane of an image with...
Definition: imgutils.c:288
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
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
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
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
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:63
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:62
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int index
Definition: gxfenc.c:89
cl_device_type type
misc image utilities
int i
Definition: input.c:407
const char * arg
Definition: jacosubdec.c:66
common internal API header
@ AV_CLASS_CATEGORY_FILTER
Definition: log.h:37
unsigned bps
Definition: movenc.c:1612
AVOptions.
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:2864
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:2489
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
static const struct PPFilter filters[]
Definition: postprocess.c:134
const char * name
Definition: qsvenc.c:46
formats
Definition: signature.h:48
#define FF_ARRAY_ELEMS(a)
#define snprintf
Definition: snprintf.h:34
Describe the class of an AVClass context structure.
Definition: log.h:67
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
A list of supported channel layouts.
Definition: formats.h:86
char all_layouts
accept any known channel layout
Definition: formats.h:89
char all_counts
accept any channel layout or count
Definition: formats.h:90
int nb_channel_layouts
number of channel layouts
Definition: formats.h:88
uint64_t * channel_layouts
list of channel layouts
Definition: formats.h:87
unsigned refcount
number of references to this list
Definition: formats.h:92
struct AVFilterCommand * next
Definition: internal.h:43
double time
time expressed in seconds
Definition: internal.h:39
An instance of a filter.
Definition: avfilter.h:341
char * name
name of this filter instance
Definition: avfilter.h:346
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:344
unsigned ready
Ready status of the filter.
Definition: avfilter.h:411
Lists of formats / etc.
Definition: avfilter.h:440
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:445
AVFilterChannelLayouts * channel_layouts
Lists of supported channel layouts, only for audio.
Definition: avfilter.h:455
AVFilterFormats * samplerates
Lists of supported sample rates, only for audio.
Definition: avfilter.h:450
A list of supported formats for one end of a filter link.
Definition: formats.h:65
int * formats
list of media formats
Definition: formats.h:67
unsigned refcount
number of references to this list
Definition: formats.h:69
unsigned nb_formats
number of formats
Definition: formats.h:66
avfilter_execute_func * thread_execute
Definition: internal.h:131
FFFrameQueueGlobal frame_queues
Definition: internal.h:132
unsigned nb_filters
Definition: avfilter.h:853
AVFilterLink ** sink_links
Private fields.
Definition: avfilter.h:916
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:855
AVFilterContext ** filters
Definition: avfilter.h:852
char * aresample_swr_opts
swr options to use for the auto-inserted aresample filters, Access ONLY through AVOptions
Definition: avfilter.h:907
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:884
unsigned disable_auto_convert
Definition: avfilter.h:919
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:872
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:905
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:879
const AVClass * av_class
Definition: avfilter.h:851
int sink_links_count
Definition: avfilter.h:917
A filter pad used for either input or output.
Definition: internal.h:54
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
int(* activate)(AVFilterContext *ctx)
Filter activation function.
Definition: avfilter.h:330
AVOption.
Definition: opt.h:248
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
#define av_freep(p)
#define av_log(a,...)
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
AVFormatContext * ctx
Definition: movenc.c:48
const char * r
Definition: vf_curves.c:116
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_drawtext.c:873
static av_always_inline int diff(const uint32_t a, const uint32_t b)