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;
523 if (graph->disable_auto_convert) {
524 av_log(log_ctx, AV_LOG_ERROR,
525 "The filters '%s' and '%s' do not have a common format "
526 "and automatic conversion is disabled.\n",
527 link->src->name, link->dst->name);
528 return AVERROR(EINVAL);
531 /* couldn't merge format lists. auto-insert conversion filter */
532 switch (link->type) {
533 case AVMEDIA_TYPE_VIDEO:
534 if (!(filter = avfilter_get_by_name("scale"))) {
535 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
536 "not present, cannot convert pixel formats.\n");
537 return AVERROR(EINVAL);
540 snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
543 if ((ret = avfilter_graph_create_filter(&convert, filter,
544 inst_name, graph->scale_sws_opts, NULL,
548 case AVMEDIA_TYPE_AUDIO:
549 if (!(filter = avfilter_get_by_name("aresample"))) {
550 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
551 "not present, cannot convert audio formats.\n");
552 return AVERROR(EINVAL);
555 snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
557 if ((ret = avfilter_graph_create_filter(&convert, filter,
558 inst_name, graph->aresample_swr_opts,
563 return AVERROR(EINVAL);
566 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
569 if ((ret = filter_query_formats(convert)) < 0)
572 inlink = convert->inputs[0];
573 outlink = convert->outputs[0];
574 av_assert0( inlink-> in_formats->refcount > 0);
575 av_assert0( inlink->out_formats->refcount > 0);
576 av_assert0(outlink-> in_formats->refcount > 0);
577 av_assert0(outlink->out_formats->refcount > 0);
578 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
579 av_assert0( inlink-> in_samplerates->refcount > 0);
580 av_assert0( inlink->out_samplerates->refcount > 0);
581 av_assert0(outlink-> in_samplerates->refcount > 0);
582 av_assert0(outlink->out_samplerates->refcount > 0);
583 av_assert0( inlink-> in_channel_layouts->refcount > 0);
584 av_assert0( inlink->out_channel_layouts->refcount > 0);
585 av_assert0(outlink-> in_channel_layouts->refcount > 0);
586 av_assert0(outlink->out_channel_layouts->refcount > 0);
588 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
589 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
590 ret = AVERROR(ENOSYS);
591 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
592 (!ff_merge_samplerates(inlink->in_samplerates,
593 inlink->out_samplerates) ||
594 !ff_merge_channel_layouts(inlink->in_channel_layouts,
595 inlink->out_channel_layouts)))
596 ret = AVERROR(ENOSYS);
597 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
598 (!ff_merge_samplerates(outlink->in_samplerates,
599 outlink->out_samplerates) ||
600 !ff_merge_channel_layouts(outlink->in_channel_layouts,
601 outlink->out_channel_layouts)))
602 ret = AVERROR(ENOSYS);
605 av_log(log_ctx, AV_LOG_ERROR,
606 "Impossible to convert between the formats supported by the filter "
607 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
614 av_log(graph, AV_LOG_DEBUG, "query_formats: "
615 "%d queried, %d merged, %d already done, %d delayed\n",
616 count_queried, count_merged, count_already_merged, count_delayed);
620 /* if count_queried > 0, one filter at least did set its formats,
621 that will give additional information to its neighbour;
622 if count_merged > 0, one pair of formats lists at least was merged,
623 that will give additional information to all connected filters;
624 in both cases, progress was made and a new round must be done */
625 if (count_queried || count_merged)
626 return AVERROR(EAGAIN);
627 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
628 for (i = 0; i < graph->nb_filters; i++)
629 if (!formats_declared(graph->filters[i]))
630 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
631 graph->filters[i]->name);
632 av_log(graph, AV_LOG_ERROR,
633 "The following filters could not choose their formats: %s\n"
634 "Consider inserting the (a)format filter near their input or "
635 "output.\n", bp.str);
641 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
645 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
648 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
649 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
651 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
653 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
654 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
657 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
658 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
664 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
665 enum AVSampleFormat src_fmt)
669 score1 = get_fmt_score(dst_fmt1, src_fmt);
670 score2 = get_fmt_score(dst_fmt2, src_fmt);
672 return score1 < score2 ? dst_fmt1 : dst_fmt2;
675 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
677 if (!link || !link->in_formats)
680 if (link->type == AVMEDIA_TYPE_VIDEO) {
681 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
682 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
683 enum AVPixelFormat best= AV_PIX_FMT_NONE;
685 for (i=0; i<link->in_formats->nb_formats; i++) {
686 enum AVPixelFormat p = link->in_formats->formats[i];
687 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
689 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
690 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
691 av_get_pix_fmt_name(ref->format), has_alpha);
692 link->in_formats->formats[0] = best;
694 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
695 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
696 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
698 for (i=0; i<link->in_formats->nb_formats; i++) {
699 enum AVSampleFormat p = link->in_formats->formats[i];
700 best = find_best_sample_fmt_of_2(best, p, ref->format);
702 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
703 av_get_sample_fmt_name(best), link->in_formats->nb_formats,
704 av_get_sample_fmt_name(ref->format));
705 link->in_formats->formats[0] = best;
709 link->in_formats->nb_formats = 1;
710 link->format = link->in_formats->formats[0];
712 if (link->type == AVMEDIA_TYPE_AUDIO) {
713 if (!link->in_samplerates->nb_formats) {
714 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
715 " the link between filters %s and %s.\n", link->src->name,
717 return AVERROR(EINVAL);
719 link->in_samplerates->nb_formats = 1;
720 link->sample_rate = link->in_samplerates->formats[0];
722 if (link->in_channel_layouts->all_layouts) {
723 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
724 " the link between filters %s and %s.\n", link->src->name,
726 if (!link->in_channel_layouts->all_counts)
727 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
728 "supported, try specifying a channel layout using "
729 "'aformat=channel_layouts=something'.\n");
730 return AVERROR(EINVAL);
732 link->in_channel_layouts->nb_channel_layouts = 1;
733 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
734 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
735 link->channel_layout = 0;
737 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
740 ff_formats_unref(&link->in_formats);
741 ff_formats_unref(&link->out_formats);
742 ff_formats_unref(&link->in_samplerates);
743 ff_formats_unref(&link->out_samplerates);
744 ff_channel_layouts_unref(&link->in_channel_layouts);
745 ff_channel_layouts_unref(&link->out_channel_layouts);
750 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
752 for (i = 0; i < filter->nb_inputs; i++) { \
753 AVFilterLink *link = filter->inputs[i]; \
756 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
758 fmt = link->out_ ## list->var[0]; \
760 for (j = 0; j < filter->nb_outputs; j++) { \
761 AVFilterLink *out_link = filter->outputs[j]; \
764 if (link->type != out_link->type || \
765 out_link->in_ ## list->nb == 1) \
767 fmts = out_link->in_ ## list; \
769 if (!out_link->in_ ## list->nb) { \
770 if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
776 for (k = 0; k < out_link->in_ ## list->nb; k++) \
777 if (fmts->var[k] == fmt) { \
778 fmts->var[0] = fmt; \
787 static int reduce_formats_on_filter(AVFilterContext *filter)
789 int i, j, k, ret = 0;
791 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
792 nb_formats, ff_add_format, ff_formats_unref);
793 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
794 nb_formats, ff_add_format, ff_formats_unref);
796 /* reduce channel layouts */
797 for (i = 0; i < filter->nb_inputs; i++) {
798 AVFilterLink *inlink = filter->inputs[i];
801 if (!inlink->out_channel_layouts ||
802 inlink->out_channel_layouts->nb_channel_layouts != 1)
804 fmt = inlink->out_channel_layouts->channel_layouts[0];
806 for (j = 0; j < filter->nb_outputs; j++) {
807 AVFilterLink *outlink = filter->outputs[j];
808 AVFilterChannelLayouts *fmts;
810 fmts = outlink->in_channel_layouts;
811 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
814 if (fmts->all_layouts &&
815 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
816 /* Turn the infinite list into a singleton */
817 fmts->all_layouts = fmts->all_counts = 0;
818 if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
823 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
824 if (fmts->channel_layouts[k] == fmt) {
825 fmts->channel_layouts[0] = fmt;
826 fmts->nb_channel_layouts = 1;
837 static int reduce_formats(AVFilterGraph *graph)
844 for (i = 0; i < graph->nb_filters; i++) {
845 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
854 static void swap_samplerates_on_filter(AVFilterContext *filter)
856 AVFilterLink *link = NULL;
860 for (i = 0; i < filter->nb_inputs; i++) {
861 link = filter->inputs[i];
863 if (link->type == AVMEDIA_TYPE_AUDIO &&
864 link->out_samplerates->nb_formats== 1)
867 if (i == filter->nb_inputs)
870 sample_rate = link->out_samplerates->formats[0];
872 for (i = 0; i < filter->nb_outputs; i++) {
873 AVFilterLink *outlink = filter->outputs[i];
874 int best_idx, best_diff = INT_MAX;
876 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
877 outlink->in_samplerates->nb_formats < 2)
880 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
881 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
883 av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
885 if (diff < best_diff) {
890 FFSWAP(int, outlink->in_samplerates->formats[0],
891 outlink->in_samplerates->formats[best_idx]);
895 static void swap_samplerates(AVFilterGraph *graph)
899 for (i = 0; i < graph->nb_filters; i++)
900 swap_samplerates_on_filter(graph->filters[i]);
903 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
904 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
905 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
906 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
907 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
908 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
909 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
911 /* allowable substitutions for channel pairs when comparing layouts,
912 * ordered by priority for both values */
913 static const uint64_t ch_subst[][2] = {
914 { CH_FRONT_PAIR, CH_CENTER_PAIR },
915 { CH_FRONT_PAIR, CH_WIDE_PAIR },
916 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
917 { CH_CENTER_PAIR, CH_FRONT_PAIR },
918 { CH_CENTER_PAIR, CH_WIDE_PAIR },
919 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
920 { CH_WIDE_PAIR, CH_FRONT_PAIR },
921 { CH_WIDE_PAIR, CH_CENTER_PAIR },
922 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
923 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
924 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
925 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
926 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
927 { CH_SIDE_PAIR, CH_BACK_PAIR },
928 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
929 { CH_BACK_PAIR, CH_DIRECT_PAIR },
930 { CH_BACK_PAIR, CH_SIDE_PAIR },
931 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
932 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
933 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
934 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
937 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
939 AVFilterLink *link = NULL;
942 for (i = 0; i < filter->nb_inputs; i++) {
943 link = filter->inputs[i];
945 if (link->type == AVMEDIA_TYPE_AUDIO &&
946 link->out_channel_layouts->nb_channel_layouts == 1)
949 if (i == filter->nb_inputs)
952 for (i = 0; i < filter->nb_outputs; i++) {
953 AVFilterLink *outlink = filter->outputs[i];
954 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
956 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
957 outlink->in_channel_layouts->nb_channel_layouts < 2)
960 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
961 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
962 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
963 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
964 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
965 int count_diff = out_channels - in_channels;
966 int matched_channels, extra_channels;
969 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
970 /* Compute score in case the input or output layout encodes
971 a channel count; in this case the score is not altered by
972 the computation afterwards, as in_chlayout and
973 out_chlayout have both been set to 0 */
974 if (FF_LAYOUT2COUNT(in_chlayout))
975 in_channels = FF_LAYOUT2COUNT(in_chlayout);
976 if (FF_LAYOUT2COUNT(out_chlayout))
977 out_channels = FF_LAYOUT2COUNT(out_chlayout);
978 score -= 10000 + FFABS(out_channels - in_channels) +
979 (in_channels > out_channels ? 10000 : 0);
980 in_chlayout = out_chlayout = 0;
981 /* Let the remaining computation run, even if the score
982 value is not altered */
985 /* channel substitution */
986 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
987 uint64_t cmp0 = ch_subst[k][0];
988 uint64_t cmp1 = ch_subst[k][1];
989 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
990 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
991 in_chlayout &= ~cmp0;
992 out_chlayout &= ~cmp1;
993 /* add score for channel match, minus a deduction for
994 having to do the substitution */
995 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
999 /* no penalty for LFE channel mismatch */
1000 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
1001 (out_chlayout & AV_CH_LOW_FREQUENCY))
1003 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1004 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1006 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1008 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1010 score += 10 * matched_channels - 5 * extra_channels;
1012 if (score > best_score ||
1013 (count_diff < best_count_diff && score == best_score)) {
1016 best_count_diff = count_diff;
1019 av_assert0(best_idx >= 0);
1020 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1021 outlink->in_channel_layouts->channel_layouts[best_idx]);
1026 static void swap_channel_layouts(AVFilterGraph *graph)
1030 for (i = 0; i < graph->nb_filters; i++)
1031 swap_channel_layouts_on_filter(graph->filters[i]);
1034 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1036 AVFilterLink *link = NULL;
1040 for (i = 0; i < filter->nb_inputs; i++) {
1041 link = filter->inputs[i];
1043 if (link->type == AVMEDIA_TYPE_AUDIO &&
1044 link->out_formats->nb_formats == 1)
1047 if (i == filter->nb_inputs)
1050 format = link->out_formats->formats[0];
1051 bps = av_get_bytes_per_sample(format);
1053 for (i = 0; i < filter->nb_outputs; i++) {
1054 AVFilterLink *outlink = filter->outputs[i];
1055 int best_idx = -1, best_score = INT_MIN;
1057 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1058 outlink->in_formats->nb_formats < 2)
1061 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1062 int out_format = outlink->in_formats->formats[j];
1063 int out_bps = av_get_bytes_per_sample(out_format);
1066 if (av_get_packed_sample_fmt(out_format) == format ||
1067 av_get_planar_sample_fmt(out_format) == format) {
1072 /* for s32 and float prefer double to prevent loss of information */
1073 if (bps == 4 && out_bps == 8) {
1078 /* prefer closest higher or equal bps */
1079 score = -abs(out_bps - bps);
1083 if (score > best_score) {
1088 av_assert0(best_idx >= 0);
1089 FFSWAP(int, outlink->in_formats->formats[0],
1090 outlink->in_formats->formats[best_idx]);
1094 static void swap_sample_fmts(AVFilterGraph *graph)
1098 for (i = 0; i < graph->nb_filters; i++)
1099 swap_sample_fmts_on_filter(graph->filters[i]);
1103 static int pick_formats(AVFilterGraph *graph)
1110 for (i = 0; i < graph->nb_filters; i++) {
1111 AVFilterContext *filter = graph->filters[i];
1112 if (filter->nb_inputs){
1113 for (j = 0; j < filter->nb_inputs; j++){
1114 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1115 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1121 if (filter->nb_outputs){
1122 for (j = 0; j < filter->nb_outputs; j++){
1123 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1124 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1130 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1131 for (j = 0; j < filter->nb_outputs; j++) {
1132 if(filter->outputs[j]->format<0) {
1133 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1142 for (i = 0; i < graph->nb_filters; i++) {
1143 AVFilterContext *filter = graph->filters[i];
1145 for (j = 0; j < filter->nb_inputs; j++)
1146 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1148 for (j = 0; j < filter->nb_outputs; j++)
1149 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1156 * Configure the formats of all the links in the graph.
1158 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1162 /* find supported formats from sub-filters, and merge along links */
1163 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1164 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1168 /* Once everything is merged, it's possible that we'll still have
1169 * multiple valid media format choices. We try to minimize the amount
1170 * of format conversion inside filters */
1171 if ((ret = reduce_formats(graph)) < 0)
1174 /* for audio filters, ensure the best format, sample rate and channel layout
1176 swap_sample_fmts(graph);
1177 swap_samplerates(graph);
1178 swap_channel_layouts(graph);
1180 if ((ret = pick_formats(graph)) < 0)
1186 static int graph_config_pointers(AVFilterGraph *graph,
1190 int sink_links_count = 0, n = 0;
1192 AVFilterLink **sinks;
1194 for (i = 0; i < graph->nb_filters; i++) {
1195 f = graph->filters[i];
1196 for (j = 0; j < f->nb_inputs; j++) {
1197 f->inputs[j]->graph = graph;
1198 f->inputs[j]->age_index = -1;
1200 for (j = 0; j < f->nb_outputs; j++) {
1201 f->outputs[j]->graph = graph;
1202 f->outputs[j]->age_index= -1;
1204 if (!f->nb_outputs) {
1205 if (f->nb_inputs > INT_MAX - sink_links_count)
1206 return AVERROR(EINVAL);
1207 sink_links_count += f->nb_inputs;
1210 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1212 return AVERROR(ENOMEM);
1213 for (i = 0; i < graph->nb_filters; i++) {
1214 f = graph->filters[i];
1215 if (!f->nb_outputs) {
1216 for (j = 0; j < f->nb_inputs; j++) {
1217 sinks[n] = f->inputs[j];
1218 f->inputs[j]->age_index = n++;
1222 av_assert0(n == sink_links_count);
1223 graph->sink_links = sinks;
1224 graph->sink_links_count = sink_links_count;
1228 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1234 for (i = 0; i < graph->nb_filters; i++) {
1235 f = graph->filters[i];
1237 for (j = 0; j < f->nb_inputs; j++) {
1238 AVFilterLink *link = f->inputs[j];
1239 AVFilterContext *fifo_ctx;
1240 const AVFilter *fifo;
1243 if (!link->dstpad->needs_fifo)
1246 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1247 avfilter_get_by_name("fifo") :
1248 avfilter_get_by_name("afifo");
1250 snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1252 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1257 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1266 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1270 if ((ret = graph_check_validity(graphctx, log_ctx)))
1272 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1274 if ((ret = graph_config_formats(graphctx, log_ctx)))
1276 if ((ret = graph_config_links(graphctx, log_ctx)))
1278 if ((ret = graph_check_links(graphctx, log_ctx)))
1280 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1286 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1288 int i, r = AVERROR(ENOSYS);
1293 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1294 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1295 if (r != AVERROR(ENOSYS))
1302 for (i = 0; i < graph->nb_filters; i++) {
1303 AVFilterContext *filter = graph->filters[i];
1304 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1305 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1306 if (r != AVERROR(ENOSYS)) {
1307 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1316 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1323 for (i = 0; i < graph->nb_filters; i++) {
1324 AVFilterContext *filter = graph->filters[i];
1325 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1326 AVFilterCommand **queue = &filter->command_queue, *next;
1327 while (*queue && (*queue)->time <= ts)
1328 queue = &(*queue)->next;
1330 *queue = av_mallocz(sizeof(AVFilterCommand));
1332 return AVERROR(ENOMEM);
1334 (*queue)->command = av_strdup(command);
1335 (*queue)->arg = av_strdup(arg);
1336 (*queue)->time = ts;
1337 (*queue)->flags = flags;
1338 (*queue)->next = next;
1339 if(flags & AVFILTER_CMD_FLAG_ONE)
1347 static void heap_bubble_up(AVFilterGraph *graph,
1348 AVFilterLink *link, int index)
1350 AVFilterLink **links = graph->sink_links;
1352 av_assert0(index >= 0);
1355 int parent = (index - 1) >> 1;
1356 if (links[parent]->current_pts_us >= link->current_pts_us)
1358 links[index] = links[parent];
1359 links[index]->age_index = index;
1362 links[index] = link;
1363 link->age_index = index;
1366 static void heap_bubble_down(AVFilterGraph *graph,
1367 AVFilterLink *link, int index)
1369 AVFilterLink **links = graph->sink_links;
1371 av_assert0(index >= 0);
1374 int child = 2 * index + 1;
1375 if (child >= graph->sink_links_count)
1377 if (child + 1 < graph->sink_links_count &&
1378 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1380 if (link->current_pts_us < links[child]->current_pts_us)
1382 links[index] = links[child];
1383 links[index]->age_index = index;
1386 links[index] = link;
1387 link->age_index = index;
1390 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1392 heap_bubble_up (graph, link, link->age_index);
1393 heap_bubble_down(graph, link, link->age_index);
1396 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1398 AVFilterLink *oldest = graph->sink_links[0];
1399 int64_t frame_count;
1402 while (graph->sink_links_count) {
1403 oldest = graph->sink_links[0];
1404 if (oldest->dst->filter->activate) {
1405 /* For now, buffersink is the only filter implementing activate. */
1406 r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1407 AV_BUFFERSINK_FLAG_PEEK);
1408 if (r != AVERROR_EOF)
1411 r = ff_request_frame(oldest);
1413 if (r != AVERROR_EOF)
1415 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1416 oldest->dst ? oldest->dst->name : "unknown",
1417 oldest->dstpad ? oldest->dstpad->name : "unknown");
1418 /* EOF: remove the link from the heap */
1419 if (oldest->age_index < --graph->sink_links_count)
1420 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1422 oldest->age_index = -1;
1424 if (!graph->sink_links_count)
1426 av_assert1(!oldest->dst->filter->activate);
1427 av_assert1(oldest->age_index >= 0);
1428 frame_count = oldest->frame_count_out;
1429 while (frame_count == oldest->frame_count_out) {
1430 r = ff_filter_graph_run_once(graph);
1431 if (r == AVERROR(EAGAIN) &&
1432 !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1434 ff_request_frame(oldest);
1441 int ff_filter_graph_run_once(AVFilterGraph *graph)
1443 AVFilterContext *filter;
1446 av_assert0(graph->nb_filters);
1447 filter = graph->filters[0];
1448 for (i = 1; i < graph->nb_filters; i++)
1449 if (graph->filters[i]->ready > filter->ready)
1450 filter = graph->filters[i];
1452 return AVERROR(EAGAIN);
1453 return ff_filter_activate(filter);