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"
35 #define FF_INTERNAL_FIELDS 1
36 #include "framequeue.h"
39 #include "buffersink.h"
44 #define OFFSET(x) offsetof(AVFilterGraph, x)
45 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
46 static const AVOption filtergraph_options[] = {
47 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
48 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
49 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
50 { "threads", "Maximum number of threads", OFFSET(nb_threads),
51 AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
52 {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
53 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
54 {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
55 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
59 static const AVClass filtergraph_class = {
60 .class_name = "AVFilterGraph",
61 .item_name = av_default_item_name,
62 .version = LIBAVUTIL_VERSION_INT,
63 .option = filtergraph_options,
64 .category = AV_CLASS_CATEGORY_FILTER,
68 void ff_graph_thread_free(AVFilterGraph *graph)
72 int ff_graph_thread_init(AVFilterGraph *graph)
74 graph->thread_type = 0;
75 graph->nb_threads = 1;
80 AVFilterGraph *avfilter_graph_alloc(void)
82 AVFilterGraph *ret = av_mallocz(sizeof(*ret));
86 ret->internal = av_mallocz(sizeof(*ret->internal));
92 ret->av_class = &filtergraph_class;
93 av_opt_set_defaults(ret);
94 ff_framequeue_global_init(&ret->internal->frame_queues);
99 void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
102 for (i = 0; i < graph->nb_filters; i++) {
103 if (graph->filters[i] == filter) {
104 FFSWAP(AVFilterContext*, graph->filters[i],
105 graph->filters[graph->nb_filters - 1]);
107 filter->graph = NULL;
108 for (j = 0; j<filter->nb_outputs; j++)
109 if (filter->outputs[j])
110 filter->outputs[j]->graph = NULL;
117 void avfilter_graph_free(AVFilterGraph **graph)
122 while ((*graph)->nb_filters)
123 avfilter_free((*graph)->filters[0]);
125 ff_graph_thread_free(*graph);
127 av_freep(&(*graph)->sink_links);
129 av_freep(&(*graph)->scale_sws_opts);
130 av_freep(&(*graph)->aresample_swr_opts);
131 av_freep(&(*graph)->resample_lavr_opts);
132 av_freep(&(*graph)->filters);
133 av_freep(&(*graph)->internal);
137 #if FF_API_AVFILTER_OPEN
138 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
140 AVFilterContext **filters = av_realloc(graph->filters,
141 sizeof(*filters) * (graph->nb_filters + 1));
143 return AVERROR(ENOMEM);
145 graph->filters = filters;
146 graph->filters[graph->nb_filters++] = filter;
148 filter->graph = graph;
154 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
155 const char *name, const char *args, void *opaque,
156 AVFilterGraph *graph_ctx)
160 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
162 return AVERROR(ENOMEM);
164 ret = avfilter_init_str(*filt_ctx, args);
172 avfilter_free(*filt_ctx);
177 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
179 graph->disable_auto_convert = flags;
182 AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
183 const AVFilter *filter,
186 AVFilterContext **filters, *s;
188 if (graph->thread_type && !graph->internal->thread_execute) {
189 if (graph->execute) {
190 graph->internal->thread_execute = graph->execute;
192 int ret = ff_graph_thread_init(graph);
194 av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
200 s = ff_filter_alloc(filter, name);
204 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
210 graph->filters = filters;
211 graph->filters[graph->nb_filters++] = s;
219 * Check for the validity of graph.
221 * A graph is considered valid if all its input and output pads are
224 * @return >= 0 in case of success, a negative value otherwise
226 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
228 AVFilterContext *filt;
231 for (i = 0; i < graph->nb_filters; i++) {
232 const AVFilterPad *pad;
233 filt = graph->filters[i];
235 for (j = 0; j < filt->nb_inputs; j++) {
236 if (!filt->inputs[j] || !filt->inputs[j]->src) {
237 pad = &filt->input_pads[j];
238 av_log(log_ctx, AV_LOG_ERROR,
239 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
240 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
241 return AVERROR(EINVAL);
245 for (j = 0; j < filt->nb_outputs; j++) {
246 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
247 pad = &filt->output_pads[j];
248 av_log(log_ctx, AV_LOG_ERROR,
249 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
250 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
251 return AVERROR(EINVAL);
260 * Configure all the links of graphctx.
262 * @return >= 0 in case of success, a negative value otherwise
264 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
266 AVFilterContext *filt;
269 for (i = 0; i < graph->nb_filters; i++) {
270 filt = graph->filters[i];
272 if (!filt->nb_outputs) {
273 if ((ret = avfilter_config_links(filt)))
281 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
285 for (i = 0; i < graph->nb_filters; i++)
286 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
287 return graph->filters[i];
292 static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
296 if (l->nb_channel_layouts) {
297 if (l->all_layouts || l->all_counts)
298 av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
299 l->all_layouts = l->all_counts = 0;
301 if (l->all_counts && !l->all_layouts)
302 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
307 static int filter_query_formats(AVFilterContext *ctx)
310 AVFilterFormats *formats;
311 AVFilterChannelLayouts *chlayouts;
312 AVFilterFormats *samplerates;
313 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
314 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
317 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
318 if (ret != AVERROR(EAGAIN))
319 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
320 ctx->name, av_err2str(ret));
324 for (i = 0; i < ctx->nb_inputs; i++)
325 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
326 for (i = 0; i < ctx->nb_outputs; i++)
327 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
329 formats = ff_all_formats(type);
330 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
332 if (type == AVMEDIA_TYPE_AUDIO) {
333 samplerates = ff_all_samplerates();
334 if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
336 chlayouts = ff_all_channel_layouts();
337 if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
343 static int formats_declared(AVFilterContext *f)
347 for (i = 0; i < f->nb_inputs; i++) {
348 if (!f->inputs[i]->out_formats)
350 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
351 !(f->inputs[i]->out_samplerates &&
352 f->inputs[i]->out_channel_layouts))
355 for (i = 0; i < f->nb_outputs; i++) {
356 if (!f->outputs[i]->in_formats)
358 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
359 !(f->outputs[i]->in_samplerates &&
360 f->outputs[i]->in_channel_layouts))
366 static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
368 AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
372 a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
373 if (!a->formats && arg->formats)
379 static int can_merge_formats(AVFilterFormats *a_arg,
380 AVFilterFormats *b_arg,
381 enum AVMediaType type,
384 AVFilterFormats *a, *b, *ret;
387 a = clone_filter_formats(a_arg);
388 b = clone_filter_formats(b_arg);
392 av_freep(&a->formats);
394 av_freep(&b->formats);
402 if (is_sample_rate) {
403 ret = ff_merge_samplerates(a, b);
405 ret = ff_merge_formats(a, b, type);
408 av_freep(&ret->formats);
409 av_freep(&ret->refs);
413 av_freep(&a->formats);
414 av_freep(&b->formats);
422 * Perform one round of query_formats() and merging formats lists on the
424 * @return >=0 if all links formats lists could be queried and merged;
425 * AVERROR(EAGAIN) some progress was made in the queries or merging
426 * and a later call may succeed;
427 * AVERROR(EIO) (may be changed) plus a log message if no progress
428 * was made and the negotiation is stuck;
429 * a negative error code if some other error happened
431 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
434 int scaler_count = 0, resampler_count = 0;
435 int count_queried = 0; /* successful calls to query_formats() */
436 int count_merged = 0; /* successful merge of formats lists */
437 int count_already_merged = 0; /* lists already merged */
438 int count_delayed = 0; /* lists that need to be merged later */
440 for (i = 0; i < graph->nb_filters; i++) {
441 AVFilterContext *f = graph->filters[i];
442 if (formats_declared(f))
444 if (f->filter->query_formats)
445 ret = filter_query_formats(f);
447 ret = ff_default_query_formats(f);
448 if (ret < 0 && ret != AVERROR(EAGAIN))
450 /* note: EAGAIN could indicate a partial success, not counted yet */
451 count_queried += ret >= 0;
454 /* go through and merge as many format lists as possible */
455 for (i = 0; i < graph->nb_filters; i++) {
456 AVFilterContext *filter = graph->filters[i];
458 for (j = 0; j < filter->nb_inputs; j++) {
459 AVFilterLink *link = filter->inputs[j];
460 int convert_needed = 0;
465 if (link->in_formats != link->out_formats
466 && link->in_formats && link->out_formats)
467 if (!can_merge_formats(link->in_formats, link->out_formats,
470 if (link->type == AVMEDIA_TYPE_AUDIO) {
471 if (link->in_samplerates != link->out_samplerates
472 && link->in_samplerates && link->out_samplerates)
473 if (!can_merge_formats(link->in_samplerates,
474 link->out_samplerates,
479 #define MERGE_DISPATCH(field, statement) \
480 if (!(link->in_ ## field && link->out_ ## field)) { \
482 } else if (link->in_ ## field == link->out_ ## field) { \
483 count_already_merged++; \
484 } else if (!convert_needed) { \
489 if (link->type == AVMEDIA_TYPE_AUDIO) {
490 MERGE_DISPATCH(channel_layouts,
491 if (!ff_merge_channel_layouts(link->in_channel_layouts,
492 link->out_channel_layouts))
495 MERGE_DISPATCH(samplerates,
496 if (!ff_merge_samplerates(link->in_samplerates,
497 link->out_samplerates))
501 MERGE_DISPATCH(formats,
502 if (!ff_merge_formats(link->in_formats, link->out_formats,
506 #undef MERGE_DISPATCH
508 if (convert_needed) {
509 AVFilterContext *convert;
511 AVFilterLink *inlink, *outlink;
512 char scale_args[256];
515 if (graph->disable_auto_convert) {
516 av_log(log_ctx, AV_LOG_ERROR,
517 "The filters '%s' and '%s' do not have a common format "
518 "and automatic conversion is disabled.\n",
519 link->src->name, link->dst->name);
520 return AVERROR(EINVAL);
523 /* couldn't merge format lists. auto-insert conversion filter */
524 switch (link->type) {
525 case AVMEDIA_TYPE_VIDEO:
526 if (!(filter = avfilter_get_by_name("scale"))) {
527 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
528 "not present, cannot convert pixel formats.\n");
529 return AVERROR(EINVAL);
532 snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
535 if ((ret = avfilter_graph_create_filter(&convert, filter,
536 inst_name, graph->scale_sws_opts, NULL,
540 case AVMEDIA_TYPE_AUDIO:
541 if (!(filter = avfilter_get_by_name("aresample"))) {
542 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
543 "not present, cannot convert audio formats.\n");
544 return AVERROR(EINVAL);
547 snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
549 scale_args[0] = '\0';
550 if (graph->aresample_swr_opts)
551 snprintf(scale_args, sizeof(scale_args), "%s",
552 graph->aresample_swr_opts);
553 if ((ret = avfilter_graph_create_filter(&convert, filter,
554 inst_name, graph->aresample_swr_opts,
559 return AVERROR(EINVAL);
562 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
565 if ((ret = filter_query_formats(convert)) < 0)
568 inlink = convert->inputs[0];
569 outlink = convert->outputs[0];
570 av_assert0( inlink-> in_formats->refcount > 0);
571 av_assert0( inlink->out_formats->refcount > 0);
572 av_assert0(outlink-> in_formats->refcount > 0);
573 av_assert0(outlink->out_formats->refcount > 0);
574 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
575 av_assert0( inlink-> in_samplerates->refcount > 0);
576 av_assert0( inlink->out_samplerates->refcount > 0);
577 av_assert0(outlink-> in_samplerates->refcount > 0);
578 av_assert0(outlink->out_samplerates->refcount > 0);
579 av_assert0( inlink-> in_channel_layouts->refcount > 0);
580 av_assert0( inlink->out_channel_layouts->refcount > 0);
581 av_assert0(outlink-> in_channel_layouts->refcount > 0);
582 av_assert0(outlink->out_channel_layouts->refcount > 0);
584 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
585 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
586 ret = AVERROR(ENOSYS);
587 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
588 (!ff_merge_samplerates(inlink->in_samplerates,
589 inlink->out_samplerates) ||
590 !ff_merge_channel_layouts(inlink->in_channel_layouts,
591 inlink->out_channel_layouts)))
592 ret = AVERROR(ENOSYS);
593 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
594 (!ff_merge_samplerates(outlink->in_samplerates,
595 outlink->out_samplerates) ||
596 !ff_merge_channel_layouts(outlink->in_channel_layouts,
597 outlink->out_channel_layouts)))
598 ret = AVERROR(ENOSYS);
601 av_log(log_ctx, AV_LOG_ERROR,
602 "Impossible to convert between the formats supported by the filter "
603 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
610 av_log(graph, AV_LOG_DEBUG, "query_formats: "
611 "%d queried, %d merged, %d already done, %d delayed\n",
612 count_queried, count_merged, count_already_merged, count_delayed);
616 /* if count_queried > 0, one filter at least did set its formats,
617 that will give additional information to its neighbour;
618 if count_merged > 0, one pair of formats lists at least was merged,
619 that will give additional information to all connected filters;
620 in both cases, progress was made and a new round must be done */
621 if (count_queried || count_merged)
622 return AVERROR(EAGAIN);
623 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
624 for (i = 0; i < graph->nb_filters; i++)
625 if (!formats_declared(graph->filters[i]))
626 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
627 graph->filters[i]->name);
628 av_log(graph, AV_LOG_ERROR,
629 "The following filters could not choose their formats: %s\n"
630 "Consider inserting the (a)format filter near their input or "
631 "output.\n", bp.str);
637 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
641 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
644 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
645 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
647 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
649 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
650 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
653 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
654 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
660 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
661 enum AVSampleFormat src_fmt)
665 score1 = get_fmt_score(dst_fmt1, src_fmt);
666 score2 = get_fmt_score(dst_fmt2, src_fmt);
668 return score1 < score2 ? dst_fmt1 : dst_fmt2;
671 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
673 if (!link || !link->in_formats)
676 if (link->type == AVMEDIA_TYPE_VIDEO) {
677 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
678 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
679 enum AVPixelFormat best= AV_PIX_FMT_NONE;
681 for (i=0; i<link->in_formats->nb_formats; i++) {
682 enum AVPixelFormat p = link->in_formats->formats[i];
683 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
685 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
686 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
687 av_get_pix_fmt_name(ref->format), has_alpha);
688 link->in_formats->formats[0] = best;
690 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
691 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
692 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
694 for (i=0; i<link->in_formats->nb_formats; i++) {
695 enum AVSampleFormat p = link->in_formats->formats[i];
696 best = find_best_sample_fmt_of_2(best, p, ref->format);
698 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
699 av_get_sample_fmt_name(best), link->in_formats->nb_formats,
700 av_get_sample_fmt_name(ref->format));
701 link->in_formats->formats[0] = best;
705 link->in_formats->nb_formats = 1;
706 link->format = link->in_formats->formats[0];
708 if (link->type == AVMEDIA_TYPE_AUDIO) {
709 if (!link->in_samplerates->nb_formats) {
710 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
711 " the link between filters %s and %s.\n", link->src->name,
713 return AVERROR(EINVAL);
715 link->in_samplerates->nb_formats = 1;
716 link->sample_rate = link->in_samplerates->formats[0];
718 if (link->in_channel_layouts->all_layouts) {
719 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
720 " the link between filters %s and %s.\n", link->src->name,
722 if (!link->in_channel_layouts->all_counts)
723 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
724 "supported, try specifying a channel layout using "
725 "'aformat=channel_layouts=something'.\n");
726 return AVERROR(EINVAL);
728 link->in_channel_layouts->nb_channel_layouts = 1;
729 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
730 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
731 link->channel_layout = 0;
733 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
736 ff_formats_unref(&link->in_formats);
737 ff_formats_unref(&link->out_formats);
738 ff_formats_unref(&link->in_samplerates);
739 ff_formats_unref(&link->out_samplerates);
740 ff_channel_layouts_unref(&link->in_channel_layouts);
741 ff_channel_layouts_unref(&link->out_channel_layouts);
746 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
748 for (i = 0; i < filter->nb_inputs; i++) { \
749 AVFilterLink *link = filter->inputs[i]; \
752 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
754 fmt = link->out_ ## list->var[0]; \
756 for (j = 0; j < filter->nb_outputs; j++) { \
757 AVFilterLink *out_link = filter->outputs[j]; \
760 if (link->type != out_link->type || \
761 out_link->in_ ## list->nb == 1) \
763 fmts = out_link->in_ ## list; \
765 if (!out_link->in_ ## list->nb) { \
766 if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
772 for (k = 0; k < out_link->in_ ## list->nb; k++) \
773 if (fmts->var[k] == fmt) { \
774 fmts->var[0] = fmt; \
783 static int reduce_formats_on_filter(AVFilterContext *filter)
785 int i, j, k, ret = 0;
787 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
788 nb_formats, ff_add_format, ff_formats_unref);
789 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
790 nb_formats, ff_add_format, ff_formats_unref);
792 /* reduce channel layouts */
793 for (i = 0; i < filter->nb_inputs; i++) {
794 AVFilterLink *inlink = filter->inputs[i];
797 if (!inlink->out_channel_layouts ||
798 inlink->out_channel_layouts->nb_channel_layouts != 1)
800 fmt = inlink->out_channel_layouts->channel_layouts[0];
802 for (j = 0; j < filter->nb_outputs; j++) {
803 AVFilterLink *outlink = filter->outputs[j];
804 AVFilterChannelLayouts *fmts;
806 fmts = outlink->in_channel_layouts;
807 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
810 if (fmts->all_layouts &&
811 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
812 /* Turn the infinite list into a singleton */
813 fmts->all_layouts = fmts->all_counts = 0;
814 if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
819 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
820 if (fmts->channel_layouts[k] == fmt) {
821 fmts->channel_layouts[0] = fmt;
822 fmts->nb_channel_layouts = 1;
833 static int reduce_formats(AVFilterGraph *graph)
840 for (i = 0; i < graph->nb_filters; i++) {
841 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
850 static void swap_samplerates_on_filter(AVFilterContext *filter)
852 AVFilterLink *link = NULL;
856 for (i = 0; i < filter->nb_inputs; i++) {
857 link = filter->inputs[i];
859 if (link->type == AVMEDIA_TYPE_AUDIO &&
860 link->out_samplerates->nb_formats== 1)
863 if (i == filter->nb_inputs)
866 sample_rate = link->out_samplerates->formats[0];
868 for (i = 0; i < filter->nb_outputs; i++) {
869 AVFilterLink *outlink = filter->outputs[i];
870 int best_idx, best_diff = INT_MAX;
872 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
873 outlink->in_samplerates->nb_formats < 2)
876 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
877 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
879 av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
881 if (diff < best_diff) {
886 FFSWAP(int, outlink->in_samplerates->formats[0],
887 outlink->in_samplerates->formats[best_idx]);
891 static void swap_samplerates(AVFilterGraph *graph)
895 for (i = 0; i < graph->nb_filters; i++)
896 swap_samplerates_on_filter(graph->filters[i]);
899 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
900 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
901 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
902 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
903 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
904 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
905 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
907 /* allowable substitutions for channel pairs when comparing layouts,
908 * ordered by priority for both values */
909 static const uint64_t ch_subst[][2] = {
910 { CH_FRONT_PAIR, CH_CENTER_PAIR },
911 { CH_FRONT_PAIR, CH_WIDE_PAIR },
912 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
913 { CH_CENTER_PAIR, CH_FRONT_PAIR },
914 { CH_CENTER_PAIR, CH_WIDE_PAIR },
915 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
916 { CH_WIDE_PAIR, CH_FRONT_PAIR },
917 { CH_WIDE_PAIR, CH_CENTER_PAIR },
918 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
919 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
920 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
921 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
922 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
923 { CH_SIDE_PAIR, CH_BACK_PAIR },
924 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
925 { CH_BACK_PAIR, CH_DIRECT_PAIR },
926 { CH_BACK_PAIR, CH_SIDE_PAIR },
927 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
928 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
929 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
930 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
933 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
935 AVFilterLink *link = NULL;
938 for (i = 0; i < filter->nb_inputs; i++) {
939 link = filter->inputs[i];
941 if (link->type == AVMEDIA_TYPE_AUDIO &&
942 link->out_channel_layouts->nb_channel_layouts == 1)
945 if (i == filter->nb_inputs)
948 for (i = 0; i < filter->nb_outputs; i++) {
949 AVFilterLink *outlink = filter->outputs[i];
950 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
952 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
953 outlink->in_channel_layouts->nb_channel_layouts < 2)
956 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
957 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
958 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
959 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
960 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
961 int count_diff = out_channels - in_channels;
962 int matched_channels, extra_channels;
965 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
966 /* Compute score in case the input or output layout encodes
967 a channel count; in this case the score is not altered by
968 the computation afterwards, as in_chlayout and
969 out_chlayout have both been set to 0 */
970 if (FF_LAYOUT2COUNT(in_chlayout))
971 in_channels = FF_LAYOUT2COUNT(in_chlayout);
972 if (FF_LAYOUT2COUNT(out_chlayout))
973 out_channels = FF_LAYOUT2COUNT(out_chlayout);
974 score -= 10000 + FFABS(out_channels - in_channels) +
975 (in_channels > out_channels ? 10000 : 0);
976 in_chlayout = out_chlayout = 0;
977 /* Let the remaining computation run, even if the score
978 value is not altered */
981 /* channel substitution */
982 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
983 uint64_t cmp0 = ch_subst[k][0];
984 uint64_t cmp1 = ch_subst[k][1];
985 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
986 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
987 in_chlayout &= ~cmp0;
988 out_chlayout &= ~cmp1;
989 /* add score for channel match, minus a deduction for
990 having to do the substitution */
991 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
995 /* no penalty for LFE channel mismatch */
996 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
997 (out_chlayout & AV_CH_LOW_FREQUENCY))
999 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1000 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1002 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1004 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1006 score += 10 * matched_channels - 5 * extra_channels;
1008 if (score > best_score ||
1009 (count_diff < best_count_diff && score == best_score)) {
1012 best_count_diff = count_diff;
1015 av_assert0(best_idx >= 0);
1016 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1017 outlink->in_channel_layouts->channel_layouts[best_idx]);
1022 static void swap_channel_layouts(AVFilterGraph *graph)
1026 for (i = 0; i < graph->nb_filters; i++)
1027 swap_channel_layouts_on_filter(graph->filters[i]);
1030 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1032 AVFilterLink *link = NULL;
1036 for (i = 0; i < filter->nb_inputs; i++) {
1037 link = filter->inputs[i];
1039 if (link->type == AVMEDIA_TYPE_AUDIO &&
1040 link->out_formats->nb_formats == 1)
1043 if (i == filter->nb_inputs)
1046 format = link->out_formats->formats[0];
1047 bps = av_get_bytes_per_sample(format);
1049 for (i = 0; i < filter->nb_outputs; i++) {
1050 AVFilterLink *outlink = filter->outputs[i];
1051 int best_idx = -1, best_score = INT_MIN;
1053 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1054 outlink->in_formats->nb_formats < 2)
1057 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1058 int out_format = outlink->in_formats->formats[j];
1059 int out_bps = av_get_bytes_per_sample(out_format);
1062 if (av_get_packed_sample_fmt(out_format) == format ||
1063 av_get_planar_sample_fmt(out_format) == format) {
1068 /* for s32 and float prefer double to prevent loss of information */
1069 if (bps == 4 && out_bps == 8) {
1074 /* prefer closest higher or equal bps */
1075 score = -abs(out_bps - bps);
1079 if (score > best_score) {
1084 av_assert0(best_idx >= 0);
1085 FFSWAP(int, outlink->in_formats->formats[0],
1086 outlink->in_formats->formats[best_idx]);
1090 static void swap_sample_fmts(AVFilterGraph *graph)
1094 for (i = 0; i < graph->nb_filters; i++)
1095 swap_sample_fmts_on_filter(graph->filters[i]);
1099 static int pick_formats(AVFilterGraph *graph)
1106 for (i = 0; i < graph->nb_filters; i++) {
1107 AVFilterContext *filter = graph->filters[i];
1108 if (filter->nb_inputs){
1109 for (j = 0; j < filter->nb_inputs; j++){
1110 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1111 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1117 if (filter->nb_outputs){
1118 for (j = 0; j < filter->nb_outputs; j++){
1119 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1120 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1126 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1127 for (j = 0; j < filter->nb_outputs; j++) {
1128 if(filter->outputs[j]->format<0) {
1129 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1138 for (i = 0; i < graph->nb_filters; i++) {
1139 AVFilterContext *filter = graph->filters[i];
1141 for (j = 0; j < filter->nb_inputs; j++)
1142 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1144 for (j = 0; j < filter->nb_outputs; j++)
1145 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1152 * Configure the formats of all the links in the graph.
1154 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1158 /* find supported formats from sub-filters, and merge along links */
1159 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1160 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1164 /* Once everything is merged, it's possible that we'll still have
1165 * multiple valid media format choices. We try to minimize the amount
1166 * of format conversion inside filters */
1167 if ((ret = reduce_formats(graph)) < 0)
1170 /* for audio filters, ensure the best format, sample rate and channel layout
1172 swap_sample_fmts(graph);
1173 swap_samplerates(graph);
1174 swap_channel_layouts(graph);
1176 if ((ret = pick_formats(graph)) < 0)
1182 static int graph_config_pointers(AVFilterGraph *graph,
1186 int sink_links_count = 0, n = 0;
1188 AVFilterLink **sinks;
1190 for (i = 0; i < graph->nb_filters; i++) {
1191 f = graph->filters[i];
1192 for (j = 0; j < f->nb_inputs; j++) {
1193 f->inputs[j]->graph = graph;
1194 f->inputs[j]->age_index = -1;
1196 for (j = 0; j < f->nb_outputs; j++) {
1197 f->outputs[j]->graph = graph;
1198 f->outputs[j]->age_index= -1;
1200 if (!f->nb_outputs) {
1201 if (f->nb_inputs > INT_MAX - sink_links_count)
1202 return AVERROR(EINVAL);
1203 sink_links_count += f->nb_inputs;
1206 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1208 return AVERROR(ENOMEM);
1209 for (i = 0; i < graph->nb_filters; i++) {
1210 f = graph->filters[i];
1211 if (!f->nb_outputs) {
1212 for (j = 0; j < f->nb_inputs; j++) {
1213 sinks[n] = f->inputs[j];
1214 f->inputs[j]->age_index = n++;
1218 av_assert0(n == sink_links_count);
1219 graph->sink_links = sinks;
1220 graph->sink_links_count = sink_links_count;
1224 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1230 for (i = 0; i < graph->nb_filters; i++) {
1231 f = graph->filters[i];
1233 for (j = 0; j < f->nb_inputs; j++) {
1234 AVFilterLink *link = f->inputs[j];
1235 AVFilterContext *fifo_ctx;
1239 if (!link->dstpad->needs_fifo)
1242 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1243 avfilter_get_by_name("fifo") :
1244 avfilter_get_by_name("afifo");
1246 snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1248 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1253 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1262 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1266 if ((ret = graph_check_validity(graphctx, log_ctx)))
1268 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1270 if ((ret = graph_config_formats(graphctx, log_ctx)))
1272 if ((ret = graph_config_links(graphctx, log_ctx)))
1274 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1280 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1282 int i, r = AVERROR(ENOSYS);
1287 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1288 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1289 if (r != AVERROR(ENOSYS))
1296 for (i = 0; i < graph->nb_filters; i++) {
1297 AVFilterContext *filter = graph->filters[i];
1298 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1299 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1300 if (r != AVERROR(ENOSYS)) {
1301 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1310 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1317 for (i = 0; i < graph->nb_filters; i++) {
1318 AVFilterContext *filter = graph->filters[i];
1319 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1320 AVFilterCommand **queue = &filter->command_queue, *next;
1321 while (*queue && (*queue)->time <= ts)
1322 queue = &(*queue)->next;
1324 *queue = av_mallocz(sizeof(AVFilterCommand));
1325 (*queue)->command = av_strdup(command);
1326 (*queue)->arg = av_strdup(arg);
1327 (*queue)->time = ts;
1328 (*queue)->flags = flags;
1329 (*queue)->next = next;
1330 if(flags & AVFILTER_CMD_FLAG_ONE)
1338 static void heap_bubble_up(AVFilterGraph *graph,
1339 AVFilterLink *link, int index)
1341 AVFilterLink **links = graph->sink_links;
1343 av_assert0(index >= 0);
1346 int parent = (index - 1) >> 1;
1347 if (links[parent]->current_pts_us >= link->current_pts_us)
1349 links[index] = links[parent];
1350 links[index]->age_index = index;
1353 links[index] = link;
1354 link->age_index = index;
1357 static void heap_bubble_down(AVFilterGraph *graph,
1358 AVFilterLink *link, int index)
1360 AVFilterLink **links = graph->sink_links;
1362 av_assert0(index >= 0);
1365 int child = 2 * index + 1;
1366 if (child >= graph->sink_links_count)
1368 if (child + 1 < graph->sink_links_count &&
1369 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1371 if (link->current_pts_us < links[child]->current_pts_us)
1373 links[index] = links[child];
1374 links[index]->age_index = index;
1377 links[index] = link;
1378 link->age_index = index;
1381 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1383 heap_bubble_up (graph, link, link->age_index);
1384 heap_bubble_down(graph, link, link->age_index);
1387 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1389 AVFilterLink *oldest = graph->sink_links[0];
1390 int64_t frame_count;
1393 while (graph->sink_links_count) {
1394 oldest = graph->sink_links[0];
1395 if (oldest->dst->filter->activate) {
1396 /* For now, buffersink is the only filter implementing activate. */
1397 return av_buffersink_get_frame_flags(oldest->dst, NULL,
1398 AV_BUFFERSINK_FLAG_PEEK);
1400 r = ff_request_frame(oldest);
1401 if (r != AVERROR_EOF)
1403 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1404 oldest->dst ? oldest->dst->name : "unknown",
1405 oldest->dstpad ? oldest->dstpad->name : "unknown");
1406 /* EOF: remove the link from the heap */
1407 if (oldest->age_index < --graph->sink_links_count)
1408 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1410 oldest->age_index = -1;
1412 if (!graph->sink_links_count)
1414 av_assert1(!oldest->dst->filter->activate);
1415 av_assert1(oldest->age_index >= 0);
1416 frame_count = oldest->frame_count_out;
1417 while (frame_count == oldest->frame_count_out) {
1418 r = ff_filter_graph_run_once(graph);
1419 if (r == AVERROR(EAGAIN) &&
1420 !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1422 ff_request_frame(oldest);
1429 int ff_filter_graph_run_once(AVFilterGraph *graph)
1431 AVFilterContext *filter;
1434 av_assert0(graph->nb_filters);
1435 filter = graph->filters[0];
1436 for (i = 1; i < graph->nb_filters; i++)
1437 if (graph->filters[i]->ready > filter->ready)
1438 filter = graph->filters[i];
1440 return AVERROR(EAGAIN);
1441 return ff_filter_activate(filter);