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/internal.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
40 #define OFFSET(x) offsetof(AVFilterGraph, x)
41 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
42 static const AVOption filtergraph_options[] = {
43 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
44 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
45 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
46 { "threads", "Maximum number of threads", OFFSET(nb_threads),
47 AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
48 {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
49 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
50 {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
51 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
55 static const AVClass filtergraph_class = {
56 .class_name = "AVFilterGraph",
57 .item_name = av_default_item_name,
58 .version = LIBAVUTIL_VERSION_INT,
59 .option = filtergraph_options,
60 .category = AV_CLASS_CATEGORY_FILTER,
64 void ff_graph_thread_free(AVFilterGraph *graph)
68 int ff_graph_thread_init(AVFilterGraph *graph)
70 graph->thread_type = 0;
71 graph->nb_threads = 1;
76 AVFilterGraph *avfilter_graph_alloc(void)
78 AVFilterGraph *ret = av_mallocz(sizeof(*ret));
82 ret->internal = av_mallocz(sizeof(*ret->internal));
88 ret->av_class = &filtergraph_class;
89 av_opt_set_defaults(ret);
94 void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
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]);
107 void avfilter_graph_free(AVFilterGraph **graph)
112 while ((*graph)->nb_filters)
113 avfilter_free((*graph)->filters[0]);
115 ff_graph_thread_free(*graph);
117 av_freep(&(*graph)->sink_links);
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);
127 #if FF_API_AVFILTER_OPEN
128 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
130 AVFilterContext **filters = av_realloc(graph->filters,
131 sizeof(*filters) * (graph->nb_filters + 1));
133 return AVERROR(ENOMEM);
135 graph->filters = filters;
136 graph->filters[graph->nb_filters++] = filter;
138 filter->graph = graph;
144 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
145 const char *name, const char *args, void *opaque,
146 AVFilterGraph *graph_ctx)
150 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
152 return AVERROR(ENOMEM);
154 ret = avfilter_init_str(*filt_ctx, args);
162 avfilter_free(*filt_ctx);
167 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
169 graph->disable_auto_convert = flags;
172 AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
173 const AVFilter *filter,
176 AVFilterContext **filters, *s;
178 if (graph->thread_type && !graph->internal->thread_execute) {
179 if (graph->execute) {
180 graph->internal->thread_execute = graph->execute;
182 int ret = ff_graph_thread_init(graph);
184 av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
190 s = ff_filter_alloc(filter, name);
194 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
200 graph->filters = filters;
201 graph->filters[graph->nb_filters++] = s;
209 * Check for the validity of graph.
211 * A graph is considered valid if all its input and output pads are
214 * @return >= 0 in case of success, a negative value otherwise
216 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
218 AVFilterContext *filt;
221 for (i = 0; i < graph->nb_filters; i++) {
222 const AVFilterPad *pad;
223 filt = graph->filters[i];
225 for (j = 0; j < filt->nb_inputs; j++) {
226 if (!filt->inputs[j] || !filt->inputs[j]->src) {
227 pad = &filt->input_pads[j];
228 av_log(log_ctx, AV_LOG_ERROR,
229 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
230 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
231 return AVERROR(EINVAL);
235 for (j = 0; j < filt->nb_outputs; j++) {
236 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
237 pad = &filt->output_pads[j];
238 av_log(log_ctx, AV_LOG_ERROR,
239 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
240 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
241 return AVERROR(EINVAL);
250 * Configure all the links of graphctx.
252 * @return >= 0 in case of success, a negative value otherwise
254 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
256 AVFilterContext *filt;
259 for (i = 0; i < graph->nb_filters; i++) {
260 filt = graph->filters[i];
262 if (!filt->nb_outputs) {
263 if ((ret = avfilter_config_links(filt)))
271 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
275 for (i = 0; i < graph->nb_filters; i++)
276 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
277 return graph->filters[i];
282 static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
286 if (l->nb_channel_layouts) {
287 if (l->all_layouts || l->all_counts)
288 av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
289 l->all_layouts = l->all_counts = 0;
291 if (l->all_counts && !l->all_layouts)
292 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
297 static int filter_query_formats(AVFilterContext *ctx)
300 AVFilterFormats *formats;
301 AVFilterChannelLayouts *chlayouts;
302 AVFilterFormats *samplerates;
303 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
304 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
307 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
308 if (ret != AVERROR(EAGAIN))
309 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
310 ctx->name, av_err2str(ret));
314 for (i = 0; i < ctx->nb_inputs; i++)
315 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
316 for (i = 0; i < ctx->nb_outputs; i++)
317 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
319 formats = ff_all_formats(type);
320 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
322 if (type == AVMEDIA_TYPE_AUDIO) {
323 samplerates = ff_all_samplerates();
324 if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
326 chlayouts = ff_all_channel_layouts();
327 if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
333 static int formats_declared(AVFilterContext *f)
337 for (i = 0; i < f->nb_inputs; i++) {
338 if (!f->inputs[i]->out_formats)
340 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
341 !(f->inputs[i]->out_samplerates &&
342 f->inputs[i]->out_channel_layouts))
345 for (i = 0; i < f->nb_outputs; i++) {
346 if (!f->outputs[i]->in_formats)
348 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
349 !(f->outputs[i]->in_samplerates &&
350 f->outputs[i]->in_channel_layouts))
356 static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
358 AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
362 a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
363 if (!a->formats && arg->formats)
369 static int can_merge_formats(AVFilterFormats *a_arg,
370 AVFilterFormats *b_arg,
371 enum AVMediaType type,
374 AVFilterFormats *a, *b, *ret;
377 a = clone_filter_formats(a_arg);
378 b = clone_filter_formats(b_arg);
382 av_freep(&a->formats);
384 av_freep(&b->formats);
392 if (is_sample_rate) {
393 ret = ff_merge_samplerates(a, b);
395 ret = ff_merge_formats(a, b, type);
398 av_freep(&ret->formats);
399 av_freep(&ret->refs);
403 av_freep(&a->formats);
404 av_freep(&b->formats);
412 * Perform one round of query_formats() and merging formats lists on the
414 * @return >=0 if all links formats lists could be queried and merged;
415 * AVERROR(EAGAIN) some progress was made in the queries or merging
416 * and a later call may succeed;
417 * AVERROR(EIO) (may be changed) plus a log message if no progress
418 * was made and the negotiation is stuck;
419 * a negative error code if some other error happened
421 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
424 int scaler_count = 0, resampler_count = 0;
425 int count_queried = 0; /* successful calls to query_formats() */
426 int count_merged = 0; /* successful merge of formats lists */
427 int count_already_merged = 0; /* lists already merged */
428 int count_delayed = 0; /* lists that need to be merged later */
430 for (i = 0; i < graph->nb_filters; i++) {
431 AVFilterContext *f = graph->filters[i];
432 if (formats_declared(f))
434 if (f->filter->query_formats)
435 ret = filter_query_formats(f);
437 ret = ff_default_query_formats(f);
438 if (ret < 0 && ret != AVERROR(EAGAIN))
440 /* note: EAGAIN could indicate a partial success, not counted yet */
441 count_queried += ret >= 0;
444 /* go through and merge as many format lists as possible */
445 for (i = 0; i < graph->nb_filters; i++) {
446 AVFilterContext *filter = graph->filters[i];
448 for (j = 0; j < filter->nb_inputs; j++) {
449 AVFilterLink *link = filter->inputs[j];
450 int convert_needed = 0;
455 if (link->in_formats != link->out_formats
456 && link->in_formats && link->out_formats)
457 if (!can_merge_formats(link->in_formats, link->out_formats,
460 if (link->type == AVMEDIA_TYPE_AUDIO) {
461 if (link->in_samplerates != link->out_samplerates
462 && link->in_samplerates && link->out_samplerates)
463 if (!can_merge_formats(link->in_samplerates,
464 link->out_samplerates,
469 #define MERGE_DISPATCH(field, statement) \
470 if (!(link->in_ ## field && link->out_ ## field)) { \
472 } else if (link->in_ ## field == link->out_ ## field) { \
473 count_already_merged++; \
474 } else if (!convert_needed) { \
479 if (link->type == AVMEDIA_TYPE_AUDIO) {
480 MERGE_DISPATCH(channel_layouts,
481 if (!ff_merge_channel_layouts(link->in_channel_layouts,
482 link->out_channel_layouts))
485 MERGE_DISPATCH(samplerates,
486 if (!ff_merge_samplerates(link->in_samplerates,
487 link->out_samplerates))
491 MERGE_DISPATCH(formats,
492 if (!ff_merge_formats(link->in_formats, link->out_formats,
496 #undef MERGE_DISPATCH
498 if (convert_needed) {
499 AVFilterContext *convert;
501 AVFilterLink *inlink, *outlink;
502 char scale_args[256];
505 /* couldn't merge format lists. auto-insert conversion filter */
506 switch (link->type) {
507 case AVMEDIA_TYPE_VIDEO:
508 if (!(filter = avfilter_get_by_name("scale"))) {
509 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
510 "not present, cannot convert pixel formats.\n");
511 return AVERROR(EINVAL);
514 snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
517 if ((ret = avfilter_graph_create_filter(&convert, filter,
518 inst_name, graph->scale_sws_opts, NULL,
522 case AVMEDIA_TYPE_AUDIO:
523 if (!(filter = avfilter_get_by_name("aresample"))) {
524 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
525 "not present, cannot convert audio formats.\n");
526 return AVERROR(EINVAL);
529 snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
531 scale_args[0] = '\0';
532 if (graph->aresample_swr_opts)
533 snprintf(scale_args, sizeof(scale_args), "%s",
534 graph->aresample_swr_opts);
535 if ((ret = avfilter_graph_create_filter(&convert, filter,
536 inst_name, graph->aresample_swr_opts,
541 return AVERROR(EINVAL);
544 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
547 if ((ret = filter_query_formats(convert)) < 0)
550 inlink = convert->inputs[0];
551 outlink = convert->outputs[0];
552 av_assert0( inlink-> in_formats->refcount > 0);
553 av_assert0( inlink->out_formats->refcount > 0);
554 av_assert0(outlink-> in_formats->refcount > 0);
555 av_assert0(outlink->out_formats->refcount > 0);
556 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
557 av_assert0( inlink-> in_samplerates->refcount > 0);
558 av_assert0( inlink->out_samplerates->refcount > 0);
559 av_assert0(outlink-> in_samplerates->refcount > 0);
560 av_assert0(outlink->out_samplerates->refcount > 0);
561 av_assert0( inlink-> in_channel_layouts->refcount > 0);
562 av_assert0( inlink->out_channel_layouts->refcount > 0);
563 av_assert0(outlink-> in_channel_layouts->refcount > 0);
564 av_assert0(outlink->out_channel_layouts->refcount > 0);
566 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
567 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
568 ret = AVERROR(ENOSYS);
569 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
570 (!ff_merge_samplerates(inlink->in_samplerates,
571 inlink->out_samplerates) ||
572 !ff_merge_channel_layouts(inlink->in_channel_layouts,
573 inlink->out_channel_layouts)))
574 ret = AVERROR(ENOSYS);
575 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
576 (!ff_merge_samplerates(outlink->in_samplerates,
577 outlink->out_samplerates) ||
578 !ff_merge_channel_layouts(outlink->in_channel_layouts,
579 outlink->out_channel_layouts)))
580 ret = AVERROR(ENOSYS);
583 av_log(log_ctx, AV_LOG_ERROR,
584 "Impossible to convert between the formats supported by the filter "
585 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
592 av_log(graph, AV_LOG_DEBUG, "query_formats: "
593 "%d queried, %d merged, %d already done, %d delayed\n",
594 count_queried, count_merged, count_already_merged, count_delayed);
598 /* if count_queried > 0, one filter at least did set its formats,
599 that will give additional information to its neighbour;
600 if count_merged > 0, one pair of formats lists at least was merged,
601 that will give additional information to all connected filters;
602 in both cases, progress was made and a new round must be done */
603 if (count_queried || count_merged)
604 return AVERROR(EAGAIN);
605 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
606 for (i = 0; i < graph->nb_filters; i++)
607 if (!formats_declared(graph->filters[i]))
608 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
609 graph->filters[i]->name);
610 av_log(graph, AV_LOG_ERROR,
611 "The following filters could not choose their formats: %s\n"
612 "Consider inserting the (a)format filter near their input or "
613 "output.\n", bp.str);
619 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
623 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
626 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
627 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
629 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
631 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
632 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
635 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
636 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
642 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
643 enum AVSampleFormat src_fmt)
647 score1 = get_fmt_score(dst_fmt1, src_fmt);
648 score2 = get_fmt_score(dst_fmt2, src_fmt);
650 return score1 < score2 ? dst_fmt1 : dst_fmt2;
653 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
655 if (!link || !link->in_formats)
658 if (link->type == AVMEDIA_TYPE_VIDEO) {
659 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
660 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
661 enum AVPixelFormat best= AV_PIX_FMT_NONE;
663 for (i=0; i<link->in_formats->nb_formats; i++) {
664 enum AVPixelFormat p = link->in_formats->formats[i];
665 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
667 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
668 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
669 av_get_pix_fmt_name(ref->format), has_alpha);
670 link->in_formats->formats[0] = best;
672 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
673 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
674 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
676 for (i=0; i<link->in_formats->nb_formats; i++) {
677 enum AVSampleFormat p = link->in_formats->formats[i];
678 best = find_best_sample_fmt_of_2(best, p, ref->format);
680 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
681 av_get_sample_fmt_name(best), link->in_formats->nb_formats,
682 av_get_sample_fmt_name(ref->format));
683 link->in_formats->formats[0] = best;
687 link->in_formats->nb_formats = 1;
688 link->format = link->in_formats->formats[0];
690 if (link->type == AVMEDIA_TYPE_AUDIO) {
691 if (!link->in_samplerates->nb_formats) {
692 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
693 " the link between filters %s and %s.\n", link->src->name,
695 return AVERROR(EINVAL);
697 link->in_samplerates->nb_formats = 1;
698 link->sample_rate = link->in_samplerates->formats[0];
700 if (link->in_channel_layouts->all_layouts) {
701 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
702 " the link between filters %s and %s.\n", link->src->name,
704 if (!link->in_channel_layouts->all_counts)
705 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
706 "supported, try specifying a channel layout using "
707 "'aformat=channel_layouts=something'.\n");
708 return AVERROR(EINVAL);
710 link->in_channel_layouts->nb_channel_layouts = 1;
711 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
712 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
713 link->channel_layout = 0;
715 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
718 ff_formats_unref(&link->in_formats);
719 ff_formats_unref(&link->out_formats);
720 ff_formats_unref(&link->in_samplerates);
721 ff_formats_unref(&link->out_samplerates);
722 ff_channel_layouts_unref(&link->in_channel_layouts);
723 ff_channel_layouts_unref(&link->out_channel_layouts);
728 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
730 for (i = 0; i < filter->nb_inputs; i++) { \
731 AVFilterLink *link = filter->inputs[i]; \
734 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
736 fmt = link->out_ ## list->var[0]; \
738 for (j = 0; j < filter->nb_outputs; j++) { \
739 AVFilterLink *out_link = filter->outputs[j]; \
742 if (link->type != out_link->type || \
743 out_link->in_ ## list->nb == 1) \
745 fmts = out_link->in_ ## list; \
747 if (!out_link->in_ ## list->nb) { \
748 if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
754 for (k = 0; k < out_link->in_ ## list->nb; k++) \
755 if (fmts->var[k] == fmt) { \
756 fmts->var[0] = fmt; \
765 static int reduce_formats_on_filter(AVFilterContext *filter)
767 int i, j, k, ret = 0;
769 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
770 nb_formats, ff_add_format, ff_formats_unref);
771 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
772 nb_formats, ff_add_format, ff_formats_unref);
774 /* reduce channel layouts */
775 for (i = 0; i < filter->nb_inputs; i++) {
776 AVFilterLink *inlink = filter->inputs[i];
779 if (!inlink->out_channel_layouts ||
780 inlink->out_channel_layouts->nb_channel_layouts != 1)
782 fmt = inlink->out_channel_layouts->channel_layouts[0];
784 for (j = 0; j < filter->nb_outputs; j++) {
785 AVFilterLink *outlink = filter->outputs[j];
786 AVFilterChannelLayouts *fmts;
788 fmts = outlink->in_channel_layouts;
789 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
792 if (fmts->all_layouts &&
793 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
794 /* Turn the infinite list into a singleton */
795 fmts->all_layouts = fmts->all_counts = 0;
796 if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
801 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
802 if (fmts->channel_layouts[k] == fmt) {
803 fmts->channel_layouts[0] = fmt;
804 fmts->nb_channel_layouts = 1;
815 static int reduce_formats(AVFilterGraph *graph)
822 for (i = 0; i < graph->nb_filters; i++) {
823 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
832 static void swap_samplerates_on_filter(AVFilterContext *filter)
834 AVFilterLink *link = NULL;
838 for (i = 0; i < filter->nb_inputs; i++) {
839 link = filter->inputs[i];
841 if (link->type == AVMEDIA_TYPE_AUDIO &&
842 link->out_samplerates->nb_formats== 1)
845 if (i == filter->nb_inputs)
848 sample_rate = link->out_samplerates->formats[0];
850 for (i = 0; i < filter->nb_outputs; i++) {
851 AVFilterLink *outlink = filter->outputs[i];
852 int best_idx, best_diff = INT_MAX;
854 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
855 outlink->in_samplerates->nb_formats < 2)
858 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
859 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
861 if (diff < best_diff) {
866 FFSWAP(int, outlink->in_samplerates->formats[0],
867 outlink->in_samplerates->formats[best_idx]);
871 static void swap_samplerates(AVFilterGraph *graph)
875 for (i = 0; i < graph->nb_filters; i++)
876 swap_samplerates_on_filter(graph->filters[i]);
879 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
880 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
881 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
882 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
883 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
884 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
885 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
887 /* allowable substitutions for channel pairs when comparing layouts,
888 * ordered by priority for both values */
889 static const uint64_t ch_subst[][2] = {
890 { CH_FRONT_PAIR, CH_CENTER_PAIR },
891 { CH_FRONT_PAIR, CH_WIDE_PAIR },
892 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
893 { CH_CENTER_PAIR, CH_FRONT_PAIR },
894 { CH_CENTER_PAIR, CH_WIDE_PAIR },
895 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
896 { CH_WIDE_PAIR, CH_FRONT_PAIR },
897 { CH_WIDE_PAIR, CH_CENTER_PAIR },
898 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
899 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
900 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
901 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
902 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
903 { CH_SIDE_PAIR, CH_BACK_PAIR },
904 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
905 { CH_BACK_PAIR, CH_DIRECT_PAIR },
906 { CH_BACK_PAIR, CH_SIDE_PAIR },
907 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
908 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
909 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
910 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
913 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
915 AVFilterLink *link = NULL;
918 for (i = 0; i < filter->nb_inputs; i++) {
919 link = filter->inputs[i];
921 if (link->type == AVMEDIA_TYPE_AUDIO &&
922 link->out_channel_layouts->nb_channel_layouts == 1)
925 if (i == filter->nb_inputs)
928 for (i = 0; i < filter->nb_outputs; i++) {
929 AVFilterLink *outlink = filter->outputs[i];
930 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
932 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
933 outlink->in_channel_layouts->nb_channel_layouts < 2)
936 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
937 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
938 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
939 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
940 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
941 int count_diff = out_channels - in_channels;
942 int matched_channels, extra_channels;
945 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
946 /* Compute score in case the input or output layout encodes
947 a channel count; in this case the score is not altered by
948 the computation afterwards, as in_chlayout and
949 out_chlayout have both been set to 0 */
950 if (FF_LAYOUT2COUNT(in_chlayout))
951 in_channels = FF_LAYOUT2COUNT(in_chlayout);
952 if (FF_LAYOUT2COUNT(out_chlayout))
953 out_channels = FF_LAYOUT2COUNT(out_chlayout);
954 score -= 10000 + FFABS(out_channels - in_channels) +
955 (in_channels > out_channels ? 10000 : 0);
956 in_chlayout = out_chlayout = 0;
957 /* Let the remaining computation run, even if the score
958 value is not altered */
961 /* channel substitution */
962 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
963 uint64_t cmp0 = ch_subst[k][0];
964 uint64_t cmp1 = ch_subst[k][1];
965 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
966 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
967 in_chlayout &= ~cmp0;
968 out_chlayout &= ~cmp1;
969 /* add score for channel match, minus a deduction for
970 having to do the substitution */
971 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
975 /* no penalty for LFE channel mismatch */
976 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
977 (out_chlayout & AV_CH_LOW_FREQUENCY))
979 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
980 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
982 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
984 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
986 score += 10 * matched_channels - 5 * extra_channels;
988 if (score > best_score ||
989 (count_diff < best_count_diff && score == best_score)) {
992 best_count_diff = count_diff;
995 av_assert0(best_idx >= 0);
996 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
997 outlink->in_channel_layouts->channel_layouts[best_idx]);
1002 static void swap_channel_layouts(AVFilterGraph *graph)
1006 for (i = 0; i < graph->nb_filters; i++)
1007 swap_channel_layouts_on_filter(graph->filters[i]);
1010 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1012 AVFilterLink *link = NULL;
1016 for (i = 0; i < filter->nb_inputs; i++) {
1017 link = filter->inputs[i];
1019 if (link->type == AVMEDIA_TYPE_AUDIO &&
1020 link->out_formats->nb_formats == 1)
1023 if (i == filter->nb_inputs)
1026 format = link->out_formats->formats[0];
1027 bps = av_get_bytes_per_sample(format);
1029 for (i = 0; i < filter->nb_outputs; i++) {
1030 AVFilterLink *outlink = filter->outputs[i];
1031 int best_idx = -1, best_score = INT_MIN;
1033 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1034 outlink->in_formats->nb_formats < 2)
1037 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1038 int out_format = outlink->in_formats->formats[j];
1039 int out_bps = av_get_bytes_per_sample(out_format);
1042 if (av_get_packed_sample_fmt(out_format) == format ||
1043 av_get_planar_sample_fmt(out_format) == format) {
1048 /* for s32 and float prefer double to prevent loss of information */
1049 if (bps == 4 && out_bps == 8) {
1054 /* prefer closest higher or equal bps */
1055 score = -abs(out_bps - bps);
1059 if (score > best_score) {
1064 av_assert0(best_idx >= 0);
1065 FFSWAP(int, outlink->in_formats->formats[0],
1066 outlink->in_formats->formats[best_idx]);
1070 static void swap_sample_fmts(AVFilterGraph *graph)
1074 for (i = 0; i < graph->nb_filters; i++)
1075 swap_sample_fmts_on_filter(graph->filters[i]);
1079 static int pick_formats(AVFilterGraph *graph)
1086 for (i = 0; i < graph->nb_filters; i++) {
1087 AVFilterContext *filter = graph->filters[i];
1088 if (filter->nb_inputs){
1089 for (j = 0; j < filter->nb_inputs; j++){
1090 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1091 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1097 if (filter->nb_outputs){
1098 for (j = 0; j < filter->nb_outputs; j++){
1099 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1100 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1106 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1107 for (j = 0; j < filter->nb_outputs; j++) {
1108 if(filter->outputs[j]->format<0) {
1109 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1118 for (i = 0; i < graph->nb_filters; i++) {
1119 AVFilterContext *filter = graph->filters[i];
1121 for (j = 0; j < filter->nb_inputs; j++)
1122 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1124 for (j = 0; j < filter->nb_outputs; j++)
1125 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1132 * Configure the formats of all the links in the graph.
1134 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1138 /* find supported formats from sub-filters, and merge along links */
1139 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1140 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1144 /* Once everything is merged, it's possible that we'll still have
1145 * multiple valid media format choices. We try to minimize the amount
1146 * of format conversion inside filters */
1147 if ((ret = reduce_formats(graph)) < 0)
1150 /* for audio filters, ensure the best format, sample rate and channel layout
1152 swap_sample_fmts(graph);
1153 swap_samplerates(graph);
1154 swap_channel_layouts(graph);
1156 if ((ret = pick_formats(graph)) < 0)
1162 static int graph_config_pointers(AVFilterGraph *graph,
1166 int sink_links_count = 0, n = 0;
1168 AVFilterLink **sinks;
1170 for (i = 0; i < graph->nb_filters; i++) {
1171 f = graph->filters[i];
1172 for (j = 0; j < f->nb_inputs; j++) {
1173 f->inputs[j]->graph = graph;
1174 f->inputs[j]->age_index = -1;
1176 for (j = 0; j < f->nb_outputs; j++) {
1177 f->outputs[j]->graph = graph;
1178 f->outputs[j]->age_index= -1;
1180 if (!f->nb_outputs) {
1181 if (f->nb_inputs > INT_MAX - sink_links_count)
1182 return AVERROR(EINVAL);
1183 sink_links_count += f->nb_inputs;
1186 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1188 return AVERROR(ENOMEM);
1189 for (i = 0; i < graph->nb_filters; i++) {
1190 f = graph->filters[i];
1191 if (!f->nb_outputs) {
1192 for (j = 0; j < f->nb_inputs; j++) {
1193 sinks[n] = f->inputs[j];
1194 f->inputs[j]->age_index = n++;
1198 av_assert0(n == sink_links_count);
1199 graph->sink_links = sinks;
1200 graph->sink_links_count = sink_links_count;
1204 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1210 for (i = 0; i < graph->nb_filters; i++) {
1211 f = graph->filters[i];
1213 for (j = 0; j < f->nb_inputs; j++) {
1214 AVFilterLink *link = f->inputs[j];
1215 AVFilterContext *fifo_ctx;
1219 if (!link->dstpad->needs_fifo)
1222 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1223 avfilter_get_by_name("fifo") :
1224 avfilter_get_by_name("afifo");
1226 snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
1228 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1233 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1242 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1246 if ((ret = graph_check_validity(graphctx, log_ctx)))
1248 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1250 if ((ret = graph_config_formats(graphctx, log_ctx)))
1252 if ((ret = graph_config_links(graphctx, log_ctx)))
1254 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1260 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1262 int i, r = AVERROR(ENOSYS);
1267 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1268 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1269 if (r != AVERROR(ENOSYS))
1276 for (i = 0; i < graph->nb_filters; i++) {
1277 AVFilterContext *filter = graph->filters[i];
1278 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1279 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1280 if (r != AVERROR(ENOSYS)) {
1281 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1290 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1297 for (i = 0; i < graph->nb_filters; i++) {
1298 AVFilterContext *filter = graph->filters[i];
1299 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1300 AVFilterCommand **queue = &filter->command_queue, *next;
1301 while (*queue && (*queue)->time <= ts)
1302 queue = &(*queue)->next;
1304 *queue = av_mallocz(sizeof(AVFilterCommand));
1305 (*queue)->command = av_strdup(command);
1306 (*queue)->arg = av_strdup(arg);
1307 (*queue)->time = ts;
1308 (*queue)->flags = flags;
1309 (*queue)->next = next;
1310 if(flags & AVFILTER_CMD_FLAG_ONE)
1318 static void heap_bubble_up(AVFilterGraph *graph,
1319 AVFilterLink *link, int index)
1321 AVFilterLink **links = graph->sink_links;
1323 av_assert0(index >= 0);
1326 int parent = (index - 1) >> 1;
1327 if (links[parent]->current_pts_us >= link->current_pts_us)
1329 links[index] = links[parent];
1330 links[index]->age_index = index;
1333 links[index] = link;
1334 link->age_index = index;
1337 static void heap_bubble_down(AVFilterGraph *graph,
1338 AVFilterLink *link, int index)
1340 AVFilterLink **links = graph->sink_links;
1342 av_assert0(index >= 0);
1345 int child = 2 * index + 1;
1346 if (child >= graph->sink_links_count)
1348 if (child + 1 < graph->sink_links_count &&
1349 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1351 if (link->current_pts_us < links[child]->current_pts_us)
1353 links[index] = links[child];
1354 links[index]->age_index = index;
1357 links[index] = link;
1358 link->age_index = index;
1361 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1363 heap_bubble_up (graph, link, link->age_index);
1364 heap_bubble_down(graph, link, link->age_index);
1368 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1370 AVFilterLink *oldest = graph->sink_links[0];
1373 while (graph->sink_links_count) {
1374 oldest = graph->sink_links[0];
1375 r = ff_request_frame(oldest);
1376 if (r != AVERROR_EOF)
1378 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1379 oldest->dst ? oldest->dst->name : "unknown",
1380 oldest->dstpad ? oldest->dstpad->name : "unknown");
1381 /* EOF: remove the link from the heap */
1382 if (oldest->age_index < --graph->sink_links_count)
1383 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1385 oldest->age_index = -1;
1387 if (!graph->sink_links_count)
1389 av_assert1(oldest->age_index >= 0);
1390 while (oldest->frame_wanted_out) {
1391 r = ff_filter_graph_run_once(graph);
1398 static AVFilterLink *graph_run_once_find_filter(AVFilterGraph *graph)
1403 /* TODO: replace scanning the graph with a priority list */
1404 for (i = 0; i < graph->nb_filters; i++) {
1405 f = graph->filters[i];
1406 for (j = 0; j < f->nb_outputs; j++)
1407 if (f->outputs[j]->frame_wanted_in)
1408 return f->outputs[j];
1410 for (i = 0; i < graph->nb_filters; i++) {
1411 f = graph->filters[i];
1412 for (j = 0; j < f->nb_outputs; j++)
1413 if (f->outputs[j]->frame_wanted_out)
1414 return f->outputs[j];
1419 int ff_filter_graph_run_once(AVFilterGraph *graph)
1424 link = graph_run_once_find_filter(graph);
1426 av_log(NULL, AV_LOG_WARNING, "Useless run of a filter graph\n");
1427 return AVERROR(EAGAIN);
1429 ret = ff_request_frame_to_filter(link);
1430 if (ret == AVERROR_EOF)
1431 /* local EOF will be forwarded through request_frame() /
1432 set_status() until it reaches the sink */
1434 return ret < 0 ? ret : 1;