3 * Copyright (c) 2008 Vitor Sessak
4 * Copyright (c) 2007 Bobby Bingham
6 * This file is part of FFmpeg.
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.
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.
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
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/bprint.h"
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
36 #define FF_INTERNAL_FIELDS 1
37 #include "framequeue.h"
40 #include "buffersink.h"
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 },
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,
71 void ff_graph_thread_free(AVFilterGraph *graph)
75 int ff_graph_thread_init(AVFilterGraph *graph)
77 graph->thread_type = 0;
78 graph->nb_threads = 1;
83 AVFilterGraph *avfilter_graph_alloc(void)
85 AVFilterGraph *ret = av_mallocz(sizeof(*ret));
89 ret->internal = av_mallocz(sizeof(*ret->internal));
95 ret->av_class = &filtergraph_class;
96 av_opt_set_defaults(ret);
97 ff_framequeue_global_init(&ret->internal->frame_queues);
102 void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
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]);
110 filter->graph = NULL;
111 for (j = 0; j<filter->nb_outputs; j++)
112 if (filter->outputs[j])
113 filter->outputs[j]->graph = NULL;
120 void avfilter_graph_free(AVFilterGraph **graph)
125 while ((*graph)->nb_filters)
126 avfilter_free((*graph)->filters[0]);
128 ff_graph_thread_free(*graph);
130 av_freep(&(*graph)->sink_links);
132 av_freep(&(*graph)->scale_sws_opts);
133 av_freep(&(*graph)->aresample_swr_opts);
135 av_freep(&(*graph)->resample_lavr_opts);
137 av_freep(&(*graph)->filters);
138 av_freep(&(*graph)->internal);
142 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
143 const char *name, const char *args, void *opaque,
144 AVFilterGraph *graph_ctx)
148 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
150 return AVERROR(ENOMEM);
152 ret = avfilter_init_str(*filt_ctx, args);
160 avfilter_free(*filt_ctx);
165 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
167 graph->disable_auto_convert = flags;
170 AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
171 const AVFilter *filter,
174 AVFilterContext **filters, *s;
176 if (graph->thread_type && !graph->internal->thread_execute) {
177 if (graph->execute) {
178 graph->internal->thread_execute = graph->execute;
180 int ret = ff_graph_thread_init(graph);
182 av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret));
188 s = ff_filter_alloc(filter, name);
192 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
198 graph->filters = filters;
199 graph->filters[graph->nb_filters++] = s;
207 * Check for the validity of graph.
209 * A graph is considered valid if all its input and output pads are
212 * @return >= 0 in case of success, a negative value otherwise
214 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
216 AVFilterContext *filt;
219 for (i = 0; i < graph->nb_filters; i++) {
220 const AVFilterPad *pad;
221 filt = graph->filters[i];
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);
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);
248 * Configure all the links of graphctx.
250 * @return >= 0 in case of success, a negative value otherwise
252 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
254 AVFilterContext *filt;
257 for (i = 0; i < graph->nb_filters; i++) {
258 filt = graph->filters[i];
260 if (!filt->nb_outputs) {
261 if ((ret = avfilter_config_links(filt)))
269 static int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
276 for (i = 0; i < graph->nb_filters; i++) {
277 f = graph->filters[i];
278 for (j = 0; j < f->nb_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);
290 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
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];
301 static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
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;
310 if (l->all_counts && !l->all_layouts)
311 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
316 static int filter_query_formats(AVFilterContext *ctx)
319 AVFilterFormats *formats;
320 AVFilterChannelLayouts *chlayouts;
321 AVFilterFormats *samplerates;
322 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
323 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
326 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
327 if (ret != AVERROR(EAGAIN))
328 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
329 ctx->name, av_err2str(ret));
333 for (i = 0; i < ctx->nb_inputs; i++)
334 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
335 for (i = 0; i < ctx->nb_outputs; i++)
336 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
338 formats = ff_all_formats(type);
339 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
341 if (type == AVMEDIA_TYPE_AUDIO) {
342 samplerates = ff_all_samplerates();
343 if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
345 chlayouts = ff_all_channel_layouts();
346 if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
352 static int formats_declared(AVFilterContext *f)
356 for (i = 0; i < f->nb_inputs; i++) {
357 if (!f->inputs[i]->out_formats)
359 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
360 !(f->inputs[i]->out_samplerates &&
361 f->inputs[i]->out_channel_layouts))
364 for (i = 0; i < f->nb_outputs; i++) {
365 if (!f->outputs[i]->in_formats)
367 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
368 !(f->outputs[i]->in_samplerates &&
369 f->outputs[i]->in_channel_layouts))
375 static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
377 AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
381 a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
382 if (!a->formats && arg->formats)
388 static int can_merge_formats(AVFilterFormats *a_arg,
389 AVFilterFormats *b_arg,
390 enum AVMediaType type,
393 AVFilterFormats *a, *b, *ret;
396 a = clone_filter_formats(a_arg);
397 b = clone_filter_formats(b_arg);
401 av_freep(&a->formats);
403 av_freep(&b->formats);
411 if (is_sample_rate) {
412 ret = ff_merge_samplerates(a, b);
414 ret = ff_merge_formats(a, b, type);
417 av_freep(&ret->formats);
418 av_freep(&ret->refs);
422 av_freep(&a->formats);
423 av_freep(&b->formats);
431 * Perform one round of query_formats() and merging formats lists on the
433 * @return >=0 if all links formats lists could be queried and merged;
434 * AVERROR(EAGAIN) some progress was made in the queries or merging
435 * and a later call may succeed;
436 * AVERROR(EIO) (may be changed) plus a log message if no progress
437 * was made and the negotiation is stuck;
438 * a negative error code if some other error happened
440 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
443 int scaler_count = 0, resampler_count = 0;
444 int count_queried = 0; /* successful calls to query_formats() */
445 int count_merged = 0; /* successful merge of formats lists */
446 int count_already_merged = 0; /* lists already merged */
447 int count_delayed = 0; /* lists that need to be merged later */
449 for (i = 0; i < graph->nb_filters; i++) {
450 AVFilterContext *f = graph->filters[i];
451 if (formats_declared(f))
453 if (f->filter->query_formats)
454 ret = filter_query_formats(f);
456 ret = ff_default_query_formats(f);
457 if (ret < 0 && ret != AVERROR(EAGAIN))
459 /* note: EAGAIN could indicate a partial success, not counted yet */
460 count_queried += ret >= 0;
463 /* go through and merge as many format lists as possible */
464 for (i = 0; i < graph->nb_filters; i++) {
465 AVFilterContext *filter = graph->filters[i];
467 for (j = 0; j < filter->nb_inputs; j++) {
468 AVFilterLink *link = filter->inputs[j];
469 int convert_needed = 0;
474 if (link->in_formats != link->out_formats
475 && link->in_formats && link->out_formats)
476 if (!can_merge_formats(link->in_formats, link->out_formats,
479 if (link->type == AVMEDIA_TYPE_AUDIO) {
480 if (link->in_samplerates != link->out_samplerates
481 && link->in_samplerates && link->out_samplerates)
482 if (!can_merge_formats(link->in_samplerates,
483 link->out_samplerates,
488 #define MERGE_DISPATCH(field, statement) \
489 if (!(link->in_ ## field && link->out_ ## field)) { \
491 } else if (link->in_ ## field == link->out_ ## field) { \
492 count_already_merged++; \
493 } else if (!convert_needed) { \
498 if (link->type == AVMEDIA_TYPE_AUDIO) {
499 MERGE_DISPATCH(channel_layouts,
500 if (!ff_merge_channel_layouts(link->in_channel_layouts,
501 link->out_channel_layouts))
504 MERGE_DISPATCH(samplerates,
505 if (!ff_merge_samplerates(link->in_samplerates,
506 link->out_samplerates))
510 MERGE_DISPATCH(formats,
511 if (!ff_merge_formats(link->in_formats, link->out_formats,
515 #undef MERGE_DISPATCH
517 if (convert_needed) {
518 AVFilterContext *convert;
519 const AVFilter *filter;
520 AVFilterLink *inlink, *outlink;
521 char scale_args[256];
524 if (graph->disable_auto_convert) {
525 av_log(log_ctx, AV_LOG_ERROR,
526 "The filters '%s' and '%s' do not have a common format "
527 "and automatic conversion is disabled.\n",
528 link->src->name, link->dst->name);
529 return AVERROR(EINVAL);
532 /* couldn't merge format lists. auto-insert conversion filter */
533 switch (link->type) {
534 case AVMEDIA_TYPE_VIDEO:
535 if (!(filter = avfilter_get_by_name("scale"))) {
536 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
537 "not present, cannot convert pixel formats.\n");
538 return AVERROR(EINVAL);
541 snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
544 if ((ret = avfilter_graph_create_filter(&convert, filter,
545 inst_name, graph->scale_sws_opts, NULL,
549 case AVMEDIA_TYPE_AUDIO:
550 if (!(filter = avfilter_get_by_name("aresample"))) {
551 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
552 "not present, cannot convert audio formats.\n");
553 return AVERROR(EINVAL);
556 snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
558 scale_args[0] = '\0';
559 if (graph->aresample_swr_opts)
560 snprintf(scale_args, sizeof(scale_args), "%s",
561 graph->aresample_swr_opts);
562 if ((ret = avfilter_graph_create_filter(&convert, filter,
563 inst_name, graph->aresample_swr_opts,
568 return AVERROR(EINVAL);
571 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
574 if ((ret = filter_query_formats(convert)) < 0)
577 inlink = convert->inputs[0];
578 outlink = convert->outputs[0];
579 av_assert0( inlink-> in_formats->refcount > 0);
580 av_assert0( inlink->out_formats->refcount > 0);
581 av_assert0(outlink-> in_formats->refcount > 0);
582 av_assert0(outlink->out_formats->refcount > 0);
583 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
584 av_assert0( inlink-> in_samplerates->refcount > 0);
585 av_assert0( inlink->out_samplerates->refcount > 0);
586 av_assert0(outlink-> in_samplerates->refcount > 0);
587 av_assert0(outlink->out_samplerates->refcount > 0);
588 av_assert0( inlink-> in_channel_layouts->refcount > 0);
589 av_assert0( inlink->out_channel_layouts->refcount > 0);
590 av_assert0(outlink-> in_channel_layouts->refcount > 0);
591 av_assert0(outlink->out_channel_layouts->refcount > 0);
593 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
594 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
595 ret = AVERROR(ENOSYS);
596 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
597 (!ff_merge_samplerates(inlink->in_samplerates,
598 inlink->out_samplerates) ||
599 !ff_merge_channel_layouts(inlink->in_channel_layouts,
600 inlink->out_channel_layouts)))
601 ret = AVERROR(ENOSYS);
602 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
603 (!ff_merge_samplerates(outlink->in_samplerates,
604 outlink->out_samplerates) ||
605 !ff_merge_channel_layouts(outlink->in_channel_layouts,
606 outlink->out_channel_layouts)))
607 ret = AVERROR(ENOSYS);
610 av_log(log_ctx, AV_LOG_ERROR,
611 "Impossible to convert between the formats supported by the filter "
612 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
619 av_log(graph, AV_LOG_DEBUG, "query_formats: "
620 "%d queried, %d merged, %d already done, %d delayed\n",
621 count_queried, count_merged, count_already_merged, count_delayed);
625 /* if count_queried > 0, one filter at least did set its formats,
626 that will give additional information to its neighbour;
627 if count_merged > 0, one pair of formats lists at least was merged,
628 that will give additional information to all connected filters;
629 in both cases, progress was made and a new round must be done */
630 if (count_queried || count_merged)
631 return AVERROR(EAGAIN);
632 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
633 for (i = 0; i < graph->nb_filters; i++)
634 if (!formats_declared(graph->filters[i]))
635 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
636 graph->filters[i]->name);
637 av_log(graph, AV_LOG_ERROR,
638 "The following filters could not choose their formats: %s\n"
639 "Consider inserting the (a)format filter near their input or "
640 "output.\n", bp.str);
646 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
650 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
653 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
654 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
656 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
658 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
659 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
662 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
663 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
669 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
670 enum AVSampleFormat src_fmt)
674 score1 = get_fmt_score(dst_fmt1, src_fmt);
675 score2 = get_fmt_score(dst_fmt2, src_fmt);
677 return score1 < score2 ? dst_fmt1 : dst_fmt2;
680 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
682 if (!link || !link->in_formats)
685 if (link->type == AVMEDIA_TYPE_VIDEO) {
686 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
687 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
688 enum AVPixelFormat best= AV_PIX_FMT_NONE;
690 for (i=0; i<link->in_formats->nb_formats; i++) {
691 enum AVPixelFormat p = link->in_formats->formats[i];
692 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
694 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
695 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
696 av_get_pix_fmt_name(ref->format), has_alpha);
697 link->in_formats->formats[0] = best;
699 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
700 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
701 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
703 for (i=0; i<link->in_formats->nb_formats; i++) {
704 enum AVSampleFormat p = link->in_formats->formats[i];
705 best = find_best_sample_fmt_of_2(best, p, ref->format);
707 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
708 av_get_sample_fmt_name(best), link->in_formats->nb_formats,
709 av_get_sample_fmt_name(ref->format));
710 link->in_formats->formats[0] = best;
714 link->in_formats->nb_formats = 1;
715 link->format = link->in_formats->formats[0];
717 if (link->type == AVMEDIA_TYPE_AUDIO) {
718 if (!link->in_samplerates->nb_formats) {
719 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
720 " the link between filters %s and %s.\n", link->src->name,
722 return AVERROR(EINVAL);
724 link->in_samplerates->nb_formats = 1;
725 link->sample_rate = link->in_samplerates->formats[0];
727 if (link->in_channel_layouts->all_layouts) {
728 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
729 " the link between filters %s and %s.\n", link->src->name,
731 if (!link->in_channel_layouts->all_counts)
732 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
733 "supported, try specifying a channel layout using "
734 "'aformat=channel_layouts=something'.\n");
735 return AVERROR(EINVAL);
737 link->in_channel_layouts->nb_channel_layouts = 1;
738 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
739 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
740 link->channel_layout = 0;
742 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
745 ff_formats_unref(&link->in_formats);
746 ff_formats_unref(&link->out_formats);
747 ff_formats_unref(&link->in_samplerates);
748 ff_formats_unref(&link->out_samplerates);
749 ff_channel_layouts_unref(&link->in_channel_layouts);
750 ff_channel_layouts_unref(&link->out_channel_layouts);
755 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
757 for (i = 0; i < filter->nb_inputs; i++) { \
758 AVFilterLink *link = filter->inputs[i]; \
761 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
763 fmt = link->out_ ## list->var[0]; \
765 for (j = 0; j < filter->nb_outputs; j++) { \
766 AVFilterLink *out_link = filter->outputs[j]; \
769 if (link->type != out_link->type || \
770 out_link->in_ ## list->nb == 1) \
772 fmts = out_link->in_ ## list; \
774 if (!out_link->in_ ## list->nb) { \
775 if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
781 for (k = 0; k < out_link->in_ ## list->nb; k++) \
782 if (fmts->var[k] == fmt) { \
783 fmts->var[0] = fmt; \
792 static int reduce_formats_on_filter(AVFilterContext *filter)
794 int i, j, k, ret = 0;
796 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
797 nb_formats, ff_add_format, ff_formats_unref);
798 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
799 nb_formats, ff_add_format, ff_formats_unref);
801 /* reduce channel layouts */
802 for (i = 0; i < filter->nb_inputs; i++) {
803 AVFilterLink *inlink = filter->inputs[i];
806 if (!inlink->out_channel_layouts ||
807 inlink->out_channel_layouts->nb_channel_layouts != 1)
809 fmt = inlink->out_channel_layouts->channel_layouts[0];
811 for (j = 0; j < filter->nb_outputs; j++) {
812 AVFilterLink *outlink = filter->outputs[j];
813 AVFilterChannelLayouts *fmts;
815 fmts = outlink->in_channel_layouts;
816 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
819 if (fmts->all_layouts &&
820 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
821 /* Turn the infinite list into a singleton */
822 fmts->all_layouts = fmts->all_counts = 0;
823 if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
828 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
829 if (fmts->channel_layouts[k] == fmt) {
830 fmts->channel_layouts[0] = fmt;
831 fmts->nb_channel_layouts = 1;
842 static int reduce_formats(AVFilterGraph *graph)
849 for (i = 0; i < graph->nb_filters; i++) {
850 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
859 static void swap_samplerates_on_filter(AVFilterContext *filter)
861 AVFilterLink *link = NULL;
865 for (i = 0; i < filter->nb_inputs; i++) {
866 link = filter->inputs[i];
868 if (link->type == AVMEDIA_TYPE_AUDIO &&
869 link->out_samplerates->nb_formats== 1)
872 if (i == filter->nb_inputs)
875 sample_rate = link->out_samplerates->formats[0];
877 for (i = 0; i < filter->nb_outputs; i++) {
878 AVFilterLink *outlink = filter->outputs[i];
879 int best_idx, best_diff = INT_MAX;
881 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
882 outlink->in_samplerates->nb_formats < 2)
885 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
886 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
888 av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
890 if (diff < best_diff) {
895 FFSWAP(int, outlink->in_samplerates->formats[0],
896 outlink->in_samplerates->formats[best_idx]);
900 static void swap_samplerates(AVFilterGraph *graph)
904 for (i = 0; i < graph->nb_filters; i++)
905 swap_samplerates_on_filter(graph->filters[i]);
908 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
909 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
910 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
911 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
912 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
913 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
914 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
916 /* allowable substitutions for channel pairs when comparing layouts,
917 * ordered by priority for both values */
918 static const uint64_t ch_subst[][2] = {
919 { CH_FRONT_PAIR, CH_CENTER_PAIR },
920 { CH_FRONT_PAIR, CH_WIDE_PAIR },
921 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
922 { CH_CENTER_PAIR, CH_FRONT_PAIR },
923 { CH_CENTER_PAIR, CH_WIDE_PAIR },
924 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
925 { CH_WIDE_PAIR, CH_FRONT_PAIR },
926 { CH_WIDE_PAIR, CH_CENTER_PAIR },
927 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
928 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
929 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
930 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
931 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
932 { CH_SIDE_PAIR, CH_BACK_PAIR },
933 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
934 { CH_BACK_PAIR, CH_DIRECT_PAIR },
935 { CH_BACK_PAIR, CH_SIDE_PAIR },
936 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
937 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
938 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
939 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
942 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
944 AVFilterLink *link = NULL;
947 for (i = 0; i < filter->nb_inputs; i++) {
948 link = filter->inputs[i];
950 if (link->type == AVMEDIA_TYPE_AUDIO &&
951 link->out_channel_layouts->nb_channel_layouts == 1)
954 if (i == filter->nb_inputs)
957 for (i = 0; i < filter->nb_outputs; i++) {
958 AVFilterLink *outlink = filter->outputs[i];
959 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
961 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
962 outlink->in_channel_layouts->nb_channel_layouts < 2)
965 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
966 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
967 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
968 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
969 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
970 int count_diff = out_channels - in_channels;
971 int matched_channels, extra_channels;
974 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
975 /* Compute score in case the input or output layout encodes
976 a channel count; in this case the score is not altered by
977 the computation afterwards, as in_chlayout and
978 out_chlayout have both been set to 0 */
979 if (FF_LAYOUT2COUNT(in_chlayout))
980 in_channels = FF_LAYOUT2COUNT(in_chlayout);
981 if (FF_LAYOUT2COUNT(out_chlayout))
982 out_channels = FF_LAYOUT2COUNT(out_chlayout);
983 score -= 10000 + FFABS(out_channels - in_channels) +
984 (in_channels > out_channels ? 10000 : 0);
985 in_chlayout = out_chlayout = 0;
986 /* Let the remaining computation run, even if the score
987 value is not altered */
990 /* channel substitution */
991 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
992 uint64_t cmp0 = ch_subst[k][0];
993 uint64_t cmp1 = ch_subst[k][1];
994 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
995 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
996 in_chlayout &= ~cmp0;
997 out_chlayout &= ~cmp1;
998 /* add score for channel match, minus a deduction for
999 having to do the substitution */
1000 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
1004 /* no penalty for LFE channel mismatch */
1005 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
1006 (out_chlayout & AV_CH_LOW_FREQUENCY))
1008 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1009 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1011 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1013 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1015 score += 10 * matched_channels - 5 * extra_channels;
1017 if (score > best_score ||
1018 (count_diff < best_count_diff && score == best_score)) {
1021 best_count_diff = count_diff;
1024 av_assert0(best_idx >= 0);
1025 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1026 outlink->in_channel_layouts->channel_layouts[best_idx]);
1031 static void swap_channel_layouts(AVFilterGraph *graph)
1035 for (i = 0; i < graph->nb_filters; i++)
1036 swap_channel_layouts_on_filter(graph->filters[i]);
1039 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1041 AVFilterLink *link = NULL;
1045 for (i = 0; i < filter->nb_inputs; i++) {
1046 link = filter->inputs[i];
1048 if (link->type == AVMEDIA_TYPE_AUDIO &&
1049 link->out_formats->nb_formats == 1)
1052 if (i == filter->nb_inputs)
1055 format = link->out_formats->formats[0];
1056 bps = av_get_bytes_per_sample(format);
1058 for (i = 0; i < filter->nb_outputs; i++) {
1059 AVFilterLink *outlink = filter->outputs[i];
1060 int best_idx = -1, best_score = INT_MIN;
1062 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1063 outlink->in_formats->nb_formats < 2)
1066 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1067 int out_format = outlink->in_formats->formats[j];
1068 int out_bps = av_get_bytes_per_sample(out_format);
1071 if (av_get_packed_sample_fmt(out_format) == format ||
1072 av_get_planar_sample_fmt(out_format) == format) {
1077 /* for s32 and float prefer double to prevent loss of information */
1078 if (bps == 4 && out_bps == 8) {
1083 /* prefer closest higher or equal bps */
1084 score = -abs(out_bps - bps);
1088 if (score > best_score) {
1093 av_assert0(best_idx >= 0);
1094 FFSWAP(int, outlink->in_formats->formats[0],
1095 outlink->in_formats->formats[best_idx]);
1099 static void swap_sample_fmts(AVFilterGraph *graph)
1103 for (i = 0; i < graph->nb_filters; i++)
1104 swap_sample_fmts_on_filter(graph->filters[i]);
1108 static int pick_formats(AVFilterGraph *graph)
1115 for (i = 0; i < graph->nb_filters; i++) {
1116 AVFilterContext *filter = graph->filters[i];
1117 if (filter->nb_inputs){
1118 for (j = 0; j < filter->nb_inputs; j++){
1119 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1120 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1126 if (filter->nb_outputs){
1127 for (j = 0; j < filter->nb_outputs; j++){
1128 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1129 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1135 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1136 for (j = 0; j < filter->nb_outputs; j++) {
1137 if(filter->outputs[j]->format<0) {
1138 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1147 for (i = 0; i < graph->nb_filters; i++) {
1148 AVFilterContext *filter = graph->filters[i];
1150 for (j = 0; j < filter->nb_inputs; j++)
1151 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1153 for (j = 0; j < filter->nb_outputs; j++)
1154 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1161 * Configure the formats of all the links in the graph.
1163 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1167 /* find supported formats from sub-filters, and merge along links */
1168 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1169 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1173 /* Once everything is merged, it's possible that we'll still have
1174 * multiple valid media format choices. We try to minimize the amount
1175 * of format conversion inside filters */
1176 if ((ret = reduce_formats(graph)) < 0)
1179 /* for audio filters, ensure the best format, sample rate and channel layout
1181 swap_sample_fmts(graph);
1182 swap_samplerates(graph);
1183 swap_channel_layouts(graph);
1185 if ((ret = pick_formats(graph)) < 0)
1191 static int graph_config_pointers(AVFilterGraph *graph,
1195 int sink_links_count = 0, n = 0;
1197 AVFilterLink **sinks;
1199 for (i = 0; i < graph->nb_filters; i++) {
1200 f = graph->filters[i];
1201 for (j = 0; j < f->nb_inputs; j++) {
1202 f->inputs[j]->graph = graph;
1203 f->inputs[j]->age_index = -1;
1205 for (j = 0; j < f->nb_outputs; j++) {
1206 f->outputs[j]->graph = graph;
1207 f->outputs[j]->age_index= -1;
1209 if (!f->nb_outputs) {
1210 if (f->nb_inputs > INT_MAX - sink_links_count)
1211 return AVERROR(EINVAL);
1212 sink_links_count += f->nb_inputs;
1215 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1217 return AVERROR(ENOMEM);
1218 for (i = 0; i < graph->nb_filters; i++) {
1219 f = graph->filters[i];
1220 if (!f->nb_outputs) {
1221 for (j = 0; j < f->nb_inputs; j++) {
1222 sinks[n] = f->inputs[j];
1223 f->inputs[j]->age_index = n++;
1227 av_assert0(n == sink_links_count);
1228 graph->sink_links = sinks;
1229 graph->sink_links_count = sink_links_count;
1233 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1239 for (i = 0; i < graph->nb_filters; i++) {
1240 f = graph->filters[i];
1242 for (j = 0; j < f->nb_inputs; j++) {
1243 AVFilterLink *link = f->inputs[j];
1244 AVFilterContext *fifo_ctx;
1245 const AVFilter *fifo;
1248 if (!link->dstpad->needs_fifo)
1251 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1252 avfilter_get_by_name("fifo") :
1253 avfilter_get_by_name("afifo");
1255 snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1257 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1262 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1271 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1275 if ((ret = graph_check_validity(graphctx, log_ctx)))
1277 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1279 if ((ret = graph_config_formats(graphctx, log_ctx)))
1281 if ((ret = graph_config_links(graphctx, log_ctx)))
1283 if ((ret = graph_check_links(graphctx, log_ctx)))
1285 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1291 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1293 int i, r = AVERROR(ENOSYS);
1298 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1299 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1300 if (r != AVERROR(ENOSYS))
1307 for (i = 0; i < graph->nb_filters; i++) {
1308 AVFilterContext *filter = graph->filters[i];
1309 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1310 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1311 if (r != AVERROR(ENOSYS)) {
1312 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1321 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1328 for (i = 0; i < graph->nb_filters; i++) {
1329 AVFilterContext *filter = graph->filters[i];
1330 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1331 AVFilterCommand **queue = &filter->command_queue, *next;
1332 while (*queue && (*queue)->time <= ts)
1333 queue = &(*queue)->next;
1335 *queue = av_mallocz(sizeof(AVFilterCommand));
1337 return AVERROR(ENOMEM);
1339 (*queue)->command = av_strdup(command);
1340 (*queue)->arg = av_strdup(arg);
1341 (*queue)->time = ts;
1342 (*queue)->flags = flags;
1343 (*queue)->next = next;
1344 if(flags & AVFILTER_CMD_FLAG_ONE)
1352 static void heap_bubble_up(AVFilterGraph *graph,
1353 AVFilterLink *link, int index)
1355 AVFilterLink **links = graph->sink_links;
1357 av_assert0(index >= 0);
1360 int parent = (index - 1) >> 1;
1361 if (links[parent]->current_pts_us >= link->current_pts_us)
1363 links[index] = links[parent];
1364 links[index]->age_index = index;
1367 links[index] = link;
1368 link->age_index = index;
1371 static void heap_bubble_down(AVFilterGraph *graph,
1372 AVFilterLink *link, int index)
1374 AVFilterLink **links = graph->sink_links;
1376 av_assert0(index >= 0);
1379 int child = 2 * index + 1;
1380 if (child >= graph->sink_links_count)
1382 if (child + 1 < graph->sink_links_count &&
1383 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1385 if (link->current_pts_us < links[child]->current_pts_us)
1387 links[index] = links[child];
1388 links[index]->age_index = index;
1391 links[index] = link;
1392 link->age_index = index;
1395 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1397 heap_bubble_up (graph, link, link->age_index);
1398 heap_bubble_down(graph, link, link->age_index);
1401 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1403 AVFilterLink *oldest = graph->sink_links[0];
1404 int64_t frame_count;
1407 while (graph->sink_links_count) {
1408 oldest = graph->sink_links[0];
1409 if (oldest->dst->filter->activate) {
1410 /* For now, buffersink is the only filter implementing activate. */
1411 r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1412 AV_BUFFERSINK_FLAG_PEEK);
1413 if (r != AVERROR_EOF)
1416 r = ff_request_frame(oldest);
1418 if (r != AVERROR_EOF)
1420 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1421 oldest->dst ? oldest->dst->name : "unknown",
1422 oldest->dstpad ? oldest->dstpad->name : "unknown");
1423 /* EOF: remove the link from the heap */
1424 if (oldest->age_index < --graph->sink_links_count)
1425 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1427 oldest->age_index = -1;
1429 if (!graph->sink_links_count)
1431 av_assert1(!oldest->dst->filter->activate);
1432 av_assert1(oldest->age_index >= 0);
1433 frame_count = oldest->frame_count_out;
1434 while (frame_count == oldest->frame_count_out) {
1435 r = ff_filter_graph_run_once(graph);
1436 if (r == AVERROR(EAGAIN) &&
1437 !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1439 ff_request_frame(oldest);
1446 int ff_filter_graph_run_once(AVFilterGraph *graph)
1448 AVFilterContext *filter;
1451 av_assert0(graph->nb_filters);
1452 filter = graph->filters[0];
1453 for (i = 1; i < graph->nb_filters; i++)
1454 if (graph->filters[i]->ready > filter->ready)
1455 filter = graph->filters[i];
1457 return AVERROR(EAGAIN);
1458 return ff_filter_activate(filter);