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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavfilter / avfiltergraph.c
CommitLineData
2ba45a60
DM		 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"
30#include "libavutil/channel_layout.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
42static 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
55static 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
64void ff_graph_thread_free(AVFilterGraph *graph)
65{
66}
67
68int ff_graph_thread_init(AVFilterGraph *graph)
69{
70 graph->thread_type = 0;
71 graph->nb_threads = 1;
72 return 0;
73}
74#endif
75
76AVFilterGraph *avfilter_graph_alloc(void)
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
88 ret->av_class = &filtergraph_class;
89 av_opt_set_defaults(ret);
90
91 return ret;
92}
93
94void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
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
107void avfilter_graph_free(AVFilterGraph **graph)
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
128int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
129{
130 AVFilterContext **filters = av_realloc(graph->filters,
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
139FF_DISABLE_DEPRECATION_WARNINGS
140 graph->filter_count_unused = graph->nb_filters;
141FF_ENABLE_DEPRECATION_WARNINGS
142#endif
143
144 filter->graph = graph;
145
146 return 0;
147}
148#endif
149
150int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
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
166fail:
167 if (*filt_ctx)
168 avfilter_free(*filt_ctx);
169 *filt_ctx = NULL;
170 return ret;
171}
172
173void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
174{
175 graph->disable_auto_convert = flags;
176}
177
178AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
179 const AVFilter *filter,
180 const char *name)
181{
182 AVFilterContext **filters, *s;
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
210FF_DISABLE_DEPRECATION_WARNINGS
211 graph->filter_count_unused = graph->nb_filters;
212FF_ENABLE_DEPRECATION_WARNINGS
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 */
228static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
229{
230 AVFilterContext *filt;
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 */
266static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
267{
268 AVFilterContext *filt;
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
283AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
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
294static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
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
309static int filter_query_formats(AVFilterContext *ctx)
310{
311 int ret, i;
312 AVFilterFormats *formats;
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 :
317 AVMEDIA_TYPE_VIDEO;
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++)
327 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
328 for (i = 0; i < ctx->nb_outputs; i++)
329 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
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
348static int formats_declared(AVFilterContext *f)
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
371static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
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
384static int can_merge_formats(AVFilterFormats *a_arg,
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 */
436static 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)
478 if (!can_merge_formats(link->in_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,
496 if (!ff_merge_channel_layouts(link->in_channel_layouts,
497 link->out_channel_layouts))
498 convert_needed = 1;
499 )
500 MERGE_DISPATCH(samplerates,
501 if (!ff_merge_samplerates(link->in_samplerates,
502 link->out_samplerates))
503 convert_needed = 1;
504 )
505 }
506 MERGE_DISPATCH(formats,
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) {
514 AVFilterContext *convert;
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 filter_query_formats(convert);
563 inlink = convert->inputs[0];
564 outlink = convert->outputs[0];
565 av_assert0( inlink-> in_formats->refcount > 0);
566 av_assert0( inlink->out_formats->refcount > 0);
567 av_assert0(outlink-> in_formats->refcount > 0);
568 av_assert0(outlink->out_formats->refcount > 0);
569 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
570 av_assert0( inlink-> in_samplerates->refcount > 0);
571 av_assert0( inlink->out_samplerates->refcount > 0);
572 av_assert0(outlink-> in_samplerates->refcount > 0);
573 av_assert0(outlink->out_samplerates->refcount > 0);
574 av_assert0( inlink-> in_channel_layouts->refcount > 0);
575 av_assert0( inlink->out_channel_layouts->refcount > 0);
576 av_assert0(outlink-> in_channel_layouts->refcount > 0);
577 av_assert0(outlink->out_channel_layouts->refcount > 0);
578 }
579 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
580 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
581 ret = AVERROR(ENOSYS);
582 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
583 (!ff_merge_samplerates(inlink->in_samplerates,
584 inlink->out_samplerates) ||
585 !ff_merge_channel_layouts(inlink->in_channel_layouts,
586 inlink->out_channel_layouts)))
587 ret = AVERROR(ENOSYS);
588 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
589 (!ff_merge_samplerates(outlink->in_samplerates,
590 outlink->out_samplerates) ||
591 !ff_merge_channel_layouts(outlink->in_channel_layouts,
592 outlink->out_channel_layouts)))
593 ret = AVERROR(ENOSYS);
594
595 if (ret < 0) {
596 av_log(log_ctx, AV_LOG_ERROR,
597 "Impossible to convert between the formats supported by the filter "
598 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
599 return ret;
600 }
601 }
602 }
603 }
604
605 av_log(graph, AV_LOG_DEBUG, "query_formats: "
606 "%d queried, %d merged, %d already done, %d delayed\n",
607 count_queried, count_merged, count_already_merged, count_delayed);
608 if (count_delayed) {
609 AVBPrint bp;
610
611 /* if count_queried > 0, one filter at least did set its formats,
612 that will give additional information to its neighbour;
613 if count_merged > 0, one pair of formats lists at least was merged,
614 that will give additional information to all connected filters;
615 in both cases, progress was made and a new round must be done */
616 if (count_queried || count_merged)
617 return AVERROR(EAGAIN);
618 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
619 for (i = 0; i < graph->nb_filters; i++)
620 if (!formats_declared(graph->filters[i]))
621 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
622 graph->filters[i]->name);
623 av_log(graph, AV_LOG_ERROR,
624 "The following filters could not choose their formats: %s\n"
625 "Consider inserting the (a)format filter near their input or "
626 "output.\n", bp.str);
627 return AVERROR(EIO);
628 }
629 return 0;
630}
631
632static int pick_format(AVFilterLink *link, AVFilterLink *ref)
633{
634 if (!link || !link->in_formats)
635 return 0;
636
637 if (link->type == AVMEDIA_TYPE_VIDEO) {
638 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
639 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
640 enum AVPixelFormat best= AV_PIX_FMT_NONE;
641 int i;
642 for (i=0; i<link->in_formats->nb_formats; i++) {
643 enum AVPixelFormat p = link->in_formats->formats[i];
644 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
645 }
646 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
647 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
648 av_get_pix_fmt_name(ref->format), has_alpha);
649 link->in_formats->formats[0] = best;
650 }
651 }
652
653 link->in_formats->nb_formats = 1;
654 link->format = link->in_formats->formats[0];
655
656 if (link->type == AVMEDIA_TYPE_AUDIO) {
657 if (!link->in_samplerates->nb_formats) {
658 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
659 " the link between filters %s and %s.\n", link->src->name,
660 link->dst->name);
661 return AVERROR(EINVAL);
662 }
663 link->in_samplerates->nb_formats = 1;
664 link->sample_rate = link->in_samplerates->formats[0];
665
666 if (link->in_channel_layouts->all_layouts) {
667 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
668 " the link between filters %s and %s.\n", link->src->name,
669 link->dst->name);
670 if (!link->in_channel_layouts->all_counts)
671 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
672 "supported, try specifying a channel layout using "
673 "'aformat=channel_layouts=something'.\n");
674 return AVERROR(EINVAL);
675 }
676 link->in_channel_layouts->nb_channel_layouts = 1;
677 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
678 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
679 link->channel_layout = 0;
680 else
681 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
682 }
683
684 ff_formats_unref(&link->in_formats);
685 ff_formats_unref(&link->out_formats);
686 ff_formats_unref(&link->in_samplerates);
687 ff_formats_unref(&link->out_samplerates);
688 ff_channel_layouts_unref(&link->in_channel_layouts);
689 ff_channel_layouts_unref(&link->out_channel_layouts);
690
691 return 0;
692}
693
694#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
695do { \
696 for (i = 0; i < filter->nb_inputs; i++) { \
697 AVFilterLink *link = filter->inputs[i]; \
698 fmt_type fmt; \
699 \
700 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
701 continue; \
702 fmt = link->out_ ## list->var[0]; \
703 \
704 for (j = 0; j < filter->nb_outputs; j++) { \
705 AVFilterLink *out_link = filter->outputs[j]; \
706 list_type *fmts; \
707 \
708 if (link->type != out_link->type || \
709 out_link->in_ ## list->nb == 1) \
710 continue; \
711 fmts = out_link->in_ ## list; \
712 \
713 if (!out_link->in_ ## list->nb) { \
714 add_format(&out_link->in_ ##list, fmt); \
715 ret = 1; \
716 break; \
717 } \
718 \
719 for (k = 0; k < out_link->in_ ## list->nb; k++) \
720 if (fmts->var[k] == fmt) { \
721 fmts->var[0] = fmt; \
722 fmts->nb = 1; \
723 ret = 1; \
724 break; \
725 } \
726 } \
727 } \
728} while (0)
729
730static int reduce_formats_on_filter(AVFilterContext *filter)
731{
732 int i, j, k, ret = 0;
733
734 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
735 nb_formats, ff_add_format);
736 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
737 nb_formats, ff_add_format);
738
739 /* reduce channel layouts */
740 for (i = 0; i < filter->nb_inputs; i++) {
741 AVFilterLink *inlink = filter->inputs[i];
742 uint64_t fmt;
743
744 if (!inlink->out_channel_layouts ||
745 inlink->out_channel_layouts->nb_channel_layouts != 1)
746 continue;
747 fmt = inlink->out_channel_layouts->channel_layouts[0];
748
749 for (j = 0; j < filter->nb_outputs; j++) {
750 AVFilterLink *outlink = filter->outputs[j];
751 AVFilterChannelLayouts *fmts;
752
753 fmts = outlink->in_channel_layouts;
754 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
755 continue;
756
757 if (fmts->all_layouts &&
758 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
759 /* Turn the infinite list into a singleton */
760 fmts->all_layouts = fmts->all_counts = 0;
761 ff_add_channel_layout(&outlink->in_channel_layouts, fmt);
762 break;
763 }
764
765 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
766 if (fmts->channel_layouts[k] == fmt) {
767 fmts->channel_layouts[0] = fmt;
768 fmts->nb_channel_layouts = 1;
769 ret = 1;
770 break;
771 }
772 }
773 }
774 }
775
776 return ret;
777}
778
779static void reduce_formats(AVFilterGraph *graph)
780{
781 int i, reduced;
782
783 do {
784 reduced = 0;
785
786 for (i = 0; i < graph->nb_filters; i++)
787 reduced |= reduce_formats_on_filter(graph->filters[i]);
788 } while (reduced);
789}
790
791static void swap_samplerates_on_filter(AVFilterContext *filter)
792{
793 AVFilterLink *link = NULL;
794 int sample_rate;
795 int i, j;
796
797 for (i = 0; i < filter->nb_inputs; i++) {
798 link = filter->inputs[i];
799
800 if (link->type == AVMEDIA_TYPE_AUDIO &&
801 link->out_samplerates->nb_formats== 1)
802 break;
803 }
804 if (i == filter->nb_inputs)
805 return;
806
807 sample_rate = link->out_samplerates->formats[0];
808
809 for (i = 0; i < filter->nb_outputs; i++) {
810 AVFilterLink *outlink = filter->outputs[i];
811 int best_idx, best_diff = INT_MAX;
812
813 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
814 outlink->in_samplerates->nb_formats < 2)
815 continue;
816
817 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
818 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
819
820 if (diff < best_diff) {
821 best_diff = diff;
822 best_idx = j;
823 }
824 }
825 FFSWAP(int, outlink->in_samplerates->formats[0],
826 outlink->in_samplerates->formats[best_idx]);
827 }
828}
829
830static void swap_samplerates(AVFilterGraph *graph)
831{
832 int i;
833
834 for (i = 0; i < graph->nb_filters; i++)
835 swap_samplerates_on_filter(graph->filters[i]);
836}
837
838#define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
839#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
840#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
841#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
842#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
843#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
844#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
845
846/* allowable substitutions for channel pairs when comparing layouts,
847 * ordered by priority for both values */
848static const uint64_t ch_subst[][2] = {
849 { CH_FRONT_PAIR, CH_CENTER_PAIR },
850 { CH_FRONT_PAIR, CH_WIDE_PAIR },
851 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
852 { CH_CENTER_PAIR, CH_FRONT_PAIR },
853 { CH_CENTER_PAIR, CH_WIDE_PAIR },
854 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
855 { CH_WIDE_PAIR, CH_FRONT_PAIR },
856 { CH_WIDE_PAIR, CH_CENTER_PAIR },
857 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
858 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
859 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
860 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
861 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
862 { CH_SIDE_PAIR, CH_BACK_PAIR },
863 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
864 { CH_BACK_PAIR, CH_DIRECT_PAIR },
865 { CH_BACK_PAIR, CH_SIDE_PAIR },
866 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
867 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
868 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
869 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
870};
871
872static void swap_channel_layouts_on_filter(AVFilterContext *filter)
873{
874 AVFilterLink *link = NULL;
875 int i, j, k;
876
877 for (i = 0; i < filter->nb_inputs; i++) {
878 link = filter->inputs[i];
879
880 if (link->type == AVMEDIA_TYPE_AUDIO &&
881 link->out_channel_layouts->nb_channel_layouts == 1)
882 break;
883 }
884 if (i == filter->nb_inputs)
885 return;
886
887 for (i = 0; i < filter->nb_outputs; i++) {
888 AVFilterLink *outlink = filter->outputs[i];
889 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
890
891 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
892 outlink->in_channel_layouts->nb_channel_layouts < 2)
893 continue;
894
895 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
896 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
897 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
898 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
899 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
900 int count_diff = out_channels - in_channels;
901 int matched_channels, extra_channels;
902 int score = 100000;
903
904 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
905 /* Compute score in case the input or output layout encodes
906 a channel count; in this case the score is not altered by
907 the computation afterwards, as in_chlayout and
908 out_chlayout have both been set to 0 */
909 if (FF_LAYOUT2COUNT(in_chlayout))
910 in_channels = FF_LAYOUT2COUNT(in_chlayout);
911 if (FF_LAYOUT2COUNT(out_chlayout))
912 out_channels = FF_LAYOUT2COUNT(out_chlayout);
913 score -= 10000 + FFABS(out_channels - in_channels) +
914 (in_channels > out_channels ? 10000 : 0);
915 in_chlayout = out_chlayout = 0;
916 /* Let the remaining computation run, even if the score
917 value is not altered */
918 }
919
920 /* channel substitution */
921 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
922 uint64_t cmp0 = ch_subst[k][0];
923 uint64_t cmp1 = ch_subst[k][1];
924 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
925 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
926 in_chlayout &= ~cmp0;
927 out_chlayout &= ~cmp1;
928 /* add score for channel match, minus a deduction for
929 having to do the substitution */
930 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
931 }
932 }
933
934 /* no penalty for LFE channel mismatch */
935 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
936 (out_chlayout & AV_CH_LOW_FREQUENCY))
937 score += 10;
938 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
939 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
940
941 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
942 out_chlayout);
943 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
944 (~in_chlayout));
945 score += 10 * matched_channels - 5 * extra_channels;
946
947 if (score > best_score ||
948 (count_diff < best_count_diff && score == best_score)) {
949 best_score = score;
950 best_idx = j;
951 best_count_diff = count_diff;
952 }
953 }
954 av_assert0(best_idx >= 0);
955 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
956 outlink->in_channel_layouts->channel_layouts[best_idx]);
957 }
958
959}
960
961static void swap_channel_layouts(AVFilterGraph *graph)
962{
963 int i;
964
965 for (i = 0; i < graph->nb_filters; i++)
966 swap_channel_layouts_on_filter(graph->filters[i]);
967}
968
969static void swap_sample_fmts_on_filter(AVFilterContext *filter)
970{
971 AVFilterLink *link = NULL;
972 int format, bps;
973 int i, j;
974
975 for (i = 0; i < filter->nb_inputs; i++) {
976 link = filter->inputs[i];
977
978 if (link->type == AVMEDIA_TYPE_AUDIO &&
979 link->out_formats->nb_formats == 1)
980 break;
981 }
982 if (i == filter->nb_inputs)
983 return;
984
985 format = link->out_formats->formats[0];
986 bps = av_get_bytes_per_sample(format);
987
988 for (i = 0; i < filter->nb_outputs; i++) {
989 AVFilterLink *outlink = filter->outputs[i];
990 int best_idx = -1, best_score = INT_MIN;
991
992 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
993 outlink->in_formats->nb_formats < 2)
994 continue;
995
996 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
997 int out_format = outlink->in_formats->formats[j];
998 int out_bps = av_get_bytes_per_sample(out_format);
999 int score;
1000
1001 if (av_get_packed_sample_fmt(out_format) == format ||
1002 av_get_planar_sample_fmt(out_format) == format) {
1003 best_idx = j;
1004 break;
1005 }
1006
1007 /* for s32 and float prefer double to prevent loss of information */
1008 if (bps == 4 && out_bps == 8) {
1009 best_idx = j;
1010 break;
1011 }
1012
1013 /* prefer closest higher or equal bps */
1014 score = -abs(out_bps - bps);
1015 if (out_bps >= bps)
1016 score += INT_MAX/2;
1017
1018 if (score > best_score) {
1019 best_score = score;
1020 best_idx = j;
1021 }
1022 }
1023 av_assert0(best_idx >= 0);
1024 FFSWAP(int, outlink->in_formats->formats[0],
1025 outlink->in_formats->formats[best_idx]);
1026 }
1027}
1028
1029static void swap_sample_fmts(AVFilterGraph *graph)
1030{
1031 int i;
1032
1033 for (i = 0; i < graph->nb_filters; i++)
1034 swap_sample_fmts_on_filter(graph->filters[i]);
1035
1036}
1037
1038static int pick_formats(AVFilterGraph *graph)
1039{
1040 int i, j, ret;
1041 int change;
1042
1043 do{
1044 change = 0;
1045 for (i = 0; i < graph->nb_filters; i++) {
1046 AVFilterContext *filter = graph->filters[i];
1047 if (filter->nb_inputs){
1048 for (j = 0; j < filter->nb_inputs; j++){
1049 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1050 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1051 return ret;
1052 change = 1;
1053 }
1054 }
1055 }
1056 if (filter->nb_outputs){
1057 for (j = 0; j < filter->nb_outputs; j++){
1058 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1059 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1060 return ret;
1061 change = 1;
1062 }
1063 }
1064 }
1065 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1066 for (j = 0; j < filter->nb_outputs; j++) {
1067 if(filter->outputs[j]->format<0) {
1068 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1069 return ret;
1070 change = 1;
1071 }
1072 }
1073 }
1074 }
1075 }while(change);
1076
1077 for (i = 0; i < graph->nb_filters; i++) {
1078 AVFilterContext *filter = graph->filters[i];
1079
1080 for (j = 0; j < filter->nb_inputs; j++)
1081 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1082 return ret;
1083 for (j = 0; j < filter->nb_outputs; j++)
1084 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1085 return ret;
1086 }
1087 return 0;
1088}
1089
1090/**
1091 * Configure the formats of all the links in the graph.
1092 */
1093static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1094{
1095 int ret;
1096
1097 /* find supported formats from sub-filters, and merge along links */
1098 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1099 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1100 if (ret < 0)
1101 return ret;
1102
1103 /* Once everything is merged, it's possible that we'll still have
1104 * multiple valid media format choices. We try to minimize the amount
1105 * of format conversion inside filters */
1106 reduce_formats(graph);
1107
1108 /* for audio filters, ensure the best format, sample rate and channel layout
1109 * is selected */
1110 swap_sample_fmts(graph);
1111 swap_samplerates(graph);
1112 swap_channel_layouts(graph);
1113
1114 if ((ret = pick_formats(graph)) < 0)
1115 return ret;
1116
1117 return 0;
1118}
1119
1120static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph,
1121 AVClass *log_ctx)
1122{
1123 unsigned i, j;
1124 int sink_links_count = 0, n = 0;
1125 AVFilterContext *f;
1126 AVFilterLink **sinks;
1127
1128 for (i = 0; i < graph->nb_filters; i++) {
1129 f = graph->filters[i];
1130 for (j = 0; j < f->nb_inputs; j++) {
1131 f->inputs[j]->graph = graph;
1132 f->inputs[j]->age_index = -1;
1133 }
1134 for (j = 0; j < f->nb_outputs; j++) {
1135 f->outputs[j]->graph = graph;
1136 f->outputs[j]->age_index= -1;
1137 }
1138 if (!f->nb_outputs) {
1139 if (f->nb_inputs > INT_MAX - sink_links_count)
1140 return AVERROR(EINVAL);
1141 sink_links_count += f->nb_inputs;
1142 }
1143 }
1144 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1145 if (!sinks)
1146 return AVERROR(ENOMEM);
1147 for (i = 0; i < graph->nb_filters; i++) {
1148 f = graph->filters[i];
1149 if (!f->nb_outputs) {
1150 for (j = 0; j < f->nb_inputs; j++) {
1151 sinks[n] = f->inputs[j];
1152 f->inputs[j]->age_index = n++;
1153 }
1154 }
1155 }
1156 av_assert0(n == sink_links_count);
1157 graph->sink_links = sinks;
1158 graph->sink_links_count = sink_links_count;
1159 return 0;
1160}
1161
1162static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1163{
1164 AVFilterContext *f;
1165 int i, j, ret;
1166 int fifo_count = 0;
1167
1168 for (i = 0; i < graph->nb_filters; i++) {
1169 f = graph->filters[i];
1170
1171 for (j = 0; j < f->nb_inputs; j++) {
1172 AVFilterLink *link = f->inputs[j];
1173 AVFilterContext *fifo_ctx;
1174 AVFilter *fifo;
1175 char name[32];
1176
1177 if (!link->dstpad->needs_fifo)
1178 continue;
1179
1180 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1181 avfilter_get_by_name("fifo") :
1182 avfilter_get_by_name("afifo");
1183
1184 snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
1185
1186 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1187 NULL, graph);
1188 if (ret < 0)
1189 return ret;
1190
1191 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1192 if (ret < 0)
1193 return ret;
1194 }
1195 }
1196
1197 return 0;
1198}
1199
1200int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1201{
1202 int ret;
1203
1204 if ((ret = graph_check_validity(graphctx, log_ctx)))
1205 return ret;
1206 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1207 return ret;
1208 if ((ret = graph_config_formats(graphctx, log_ctx)))
1209 return ret;
1210 if ((ret = graph_config_links(graphctx, log_ctx)))
1211 return ret;
1212 if ((ret = ff_avfilter_graph_config_pointers(graphctx, log_ctx)))
1213 return ret;
1214
1215 return 0;
1216}
1217
1218int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1219{
1220 int i, r = AVERROR(ENOSYS);
1221
1222 if (!graph)
1223 return r;
1224
1225 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1226 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1227 if (r != AVERROR(ENOSYS))
1228 return r;
1229 }
1230
1231 if (res_len && res)
1232 res[0] = 0;
1233
1234 for (i = 0; i < graph->nb_filters; i++) {
1235 AVFilterContext *filter = graph->filters[i];
1236 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1237 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1238 if (r != AVERROR(ENOSYS)) {
1239 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1240 return r;
1241 }
1242 }
1243 }
1244
1245 return r;
1246}
1247
1248int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1249{
1250 int i;
1251
1252 if(!graph)
1253 return 0;
1254
1255 for (i = 0; i < graph->nb_filters; i++) {
1256 AVFilterContext *filter = graph->filters[i];
1257 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1258 AVFilterCommand **queue = &filter->command_queue, *next;
1259 while (*queue && (*queue)->time <= ts)
1260 queue = &(*queue)->next;
1261 next = *queue;
1262 *queue = av_mallocz(sizeof(AVFilterCommand));
1263 (*queue)->command = av_strdup(command);
1264 (*queue)->arg = av_strdup(arg);
1265 (*queue)->time = ts;
1266 (*queue)->flags = flags;
1267 (*queue)->next = next;
1268 if(flags & AVFILTER_CMD_FLAG_ONE)
1269 return 0;
1270 }
1271 }
1272
1273 return 0;
1274}
1275
1276static void heap_bubble_up(AVFilterGraph *graph,
1277 AVFilterLink *link, int index)
1278{
1279 AVFilterLink **links = graph->sink_links;
1280
1281 while (index) {
1282 int parent = (index - 1) >> 1;
1283 if (links[parent]->current_pts >= link->current_pts)
1284 break;
1285 links[index] = links[parent];
1286 links[index]->age_index = index;
1287 index = parent;
1288 }
1289 links[index] = link;
1290 link->age_index = index;
1291}
1292
1293static void heap_bubble_down(AVFilterGraph *graph,
1294 AVFilterLink *link, int index)
1295{
1296 AVFilterLink **links = graph->sink_links;
1297
1298 while (1) {
1299 int child = 2 * index + 1;
1300 if (child >= graph->sink_links_count)
1301 break;
1302 if (child + 1 < graph->sink_links_count &&
1303 links[child + 1]->current_pts < links[child]->current_pts)
1304 child++;
1305 if (link->current_pts < links[child]->current_pts)
1306 break;
1307 links[index] = links[child];
1308 links[index]->age_index = index;
1309 index = child;
1310 }
1311 links[index] = link;
1312 link->age_index = index;
1313}
1314
1315void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1316{
1317 heap_bubble_up (graph, link, link->age_index);
1318 heap_bubble_down(graph, link, link->age_index);
1319}
1320
1321
1322int avfilter_graph_request_oldest(AVFilterGraph *graph)
1323{
1324 while (graph->sink_links_count) {
1325 AVFilterLink *oldest = graph->sink_links[0];
1326 int r = ff_request_frame(oldest);
1327 if (r != AVERROR_EOF)
1328 return r;
1329 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1330 oldest->dst ? oldest->dst->name : "unknown",
1331 oldest->dstpad ? oldest->dstpad->name : "unknown");
1332 /* EOF: remove the link from the heap */
1333 if (oldest->age_index < --graph->sink_links_count)
1334 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1335 oldest->age_index);
1336 oldest->age_index = -1;
1337 }
1338 return AVERROR_EOF;
1339}
ffmpeg Piment Noir Debian package repository