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);
134 av_freep(&(*graph)->filters);
135 av_freep(&(*graph)->internal);
139 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
140 const char *name, const char *args, void *opaque,
141 AVFilterGraph *graph_ctx)
145 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
147 return AVERROR(ENOMEM);
149 ret = avfilter_init_str(*filt_ctx, args);
157 avfilter_free(*filt_ctx);
162 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
164 graph->disable_auto_convert = flags;
167 AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
168 const AVFilter *filter,
171 AVFilterContext **filters, *s;
173 if (graph->thread_type && !graph->internal->thread_execute) {
174 if (graph->execute) {
175 graph->internal->thread_execute = graph->execute;
177 int ret = ff_graph_thread_init(graph);
179 av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret));
185 s = ff_filter_alloc(filter, name);
189 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
195 graph->filters = filters;
196 graph->filters[graph->nb_filters++] = s;
204 * Check for the validity of graph.
206 * A graph is considered valid if all its input and output pads are
209 * @return >= 0 in case of success, a negative value otherwise
211 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
213 AVFilterContext *filt;
216 for (i = 0; i < graph->nb_filters; i++) {
217 const AVFilterPad *pad;
218 filt = graph->filters[i];
220 for (j = 0; j < filt->nb_inputs; j++) {
221 if (!filt->inputs[j] || !filt->inputs[j]->src) {
222 pad = &filt->input_pads[j];
223 av_log(log_ctx, AV_LOG_ERROR,
224 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
225 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
226 return AVERROR(EINVAL);
230 for (j = 0; j < filt->nb_outputs; j++) {
231 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
232 pad = &filt->output_pads[j];
233 av_log(log_ctx, AV_LOG_ERROR,
234 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
235 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
236 return AVERROR(EINVAL);
245 * Configure all the links of graphctx.
247 * @return >= 0 in case of success, a negative value otherwise
249 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
251 AVFilterContext *filt;
254 for (i = 0; i < graph->nb_filters; i++) {
255 filt = graph->filters[i];
257 if (!filt->nb_outputs) {
258 if ((ret = avfilter_config_links(filt)))
266 static int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
273 for (i = 0; i < graph->nb_filters; i++) {
274 f = graph->filters[i];
275 for (j = 0; j < f->nb_outputs; j++) {
277 if (l->type == AVMEDIA_TYPE_VIDEO) {
278 ret = av_image_check_size2(l->w, l->h, INT64_MAX, l->format, 0, f);
287 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
291 for (i = 0; i < graph->nb_filters; i++)
292 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
293 return graph->filters[i];
298 static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
302 if (l->nb_channel_layouts) {
303 if (l->all_layouts || l->all_counts)
304 av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
305 l->all_layouts = l->all_counts = 0;
307 if (l->all_counts && !l->all_layouts)
308 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
313 static int filter_link_check_formats(void *log, AVFilterLink *link, AVFilterFormatsConfig *cfg)
317 switch (link->type) {
319 case AVMEDIA_TYPE_VIDEO:
320 if ((ret = ff_formats_check_pixel_formats(log, cfg->formats)) < 0)
324 case AVMEDIA_TYPE_AUDIO:
325 if ((ret = ff_formats_check_sample_formats(log, cfg->formats)) < 0 ||
326 (ret = ff_formats_check_sample_rates(log, cfg->samplerates)) < 0 ||
327 (ret = ff_formats_check_channel_layouts(log, cfg->channel_layouts)) < 0)
332 av_assert0(!"reached");
338 * Check the validity of the formats / etc. lists set by query_formats().
340 * In particular, check they do not contain any redundant element.
342 static int filter_check_formats(AVFilterContext *ctx)
347 for (i = 0; i < ctx->nb_inputs; i++) {
348 ret = filter_link_check_formats(ctx, ctx->inputs[i], &ctx->inputs[i]->outcfg);
352 for (i = 0; i < ctx->nb_outputs; i++) {
353 ret = filter_link_check_formats(ctx, ctx->outputs[i], &ctx->outputs[i]->incfg);
360 static int filter_query_formats(AVFilterContext *ctx)
363 AVFilterFormats *formats;
364 AVFilterChannelLayouts *chlayouts;
365 AVFilterFormats *samplerates;
366 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
367 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
370 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
371 if (ret != AVERROR(EAGAIN))
372 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
373 ctx->name, av_err2str(ret));
376 ret = filter_check_formats(ctx);
380 for (i = 0; i < ctx->nb_inputs; i++)
381 sanitize_channel_layouts(ctx, ctx->inputs[i]->outcfg.channel_layouts);
382 for (i = 0; i < ctx->nb_outputs; i++)
383 sanitize_channel_layouts(ctx, ctx->outputs[i]->incfg.channel_layouts);
385 formats = ff_all_formats(type);
386 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
388 if (type == AVMEDIA_TYPE_AUDIO) {
389 samplerates = ff_all_samplerates();
390 if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
392 chlayouts = ff_all_channel_layouts();
393 if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
399 static int formats_declared(AVFilterContext *f)
403 for (i = 0; i < f->nb_inputs; i++) {
404 if (!f->inputs[i]->outcfg.formats)
406 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
407 !(f->inputs[i]->outcfg.samplerates &&
408 f->inputs[i]->outcfg.channel_layouts))
411 for (i = 0; i < f->nb_outputs; i++) {
412 if (!f->outputs[i]->incfg.formats)
414 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
415 !(f->outputs[i]->incfg.samplerates &&
416 f->outputs[i]->incfg.channel_layouts))
423 * Perform one round of query_formats() and merging formats lists on the
425 * @return >=0 if all links formats lists could be queried and merged;
426 * AVERROR(EAGAIN) some progress was made in the queries or merging
427 * and a later call may succeed;
428 * AVERROR(EIO) (may be changed) plus a log message if no progress
429 * was made and the negotiation is stuck;
430 * a negative error code if some other error happened
432 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
435 int scaler_count = 0, resampler_count = 0;
436 int count_queried = 0; /* successful calls to query_formats() */
437 int count_merged = 0; /* successful merge of formats lists */
438 int count_already_merged = 0; /* lists already merged */
439 int count_delayed = 0; /* lists that need to be merged later */
441 for (i = 0; i < graph->nb_filters; i++) {
442 AVFilterContext *f = graph->filters[i];
443 if (formats_declared(f))
445 if (f->filter->query_formats)
446 ret = filter_query_formats(f);
448 ret = ff_default_query_formats(f);
449 if (ret < 0 && ret != AVERROR(EAGAIN))
451 /* note: EAGAIN could indicate a partial success, not counted yet */
452 count_queried += ret >= 0;
455 /* go through and merge as many format lists as possible */
456 for (i = 0; i < graph->nb_filters; i++) {
457 AVFilterContext *filter = graph->filters[i];
459 for (j = 0; j < filter->nb_inputs; j++) {
460 AVFilterLink *link = filter->inputs[j];
461 int convert_needed = 0;
466 if (link->incfg.formats != link->outcfg.formats
467 && link->incfg.formats && link->outcfg.formats)
468 if (!ff_can_merge_formats(link->incfg.formats, link->outcfg.formats,
471 if (link->type == AVMEDIA_TYPE_AUDIO) {
472 if (link->incfg.samplerates != link->outcfg.samplerates
473 && link->incfg.samplerates && link->outcfg.samplerates)
474 if (!ff_can_merge_samplerates(link->incfg.samplerates,
475 link->outcfg.samplerates))
479 #define CHECKED_MERGE(field, ...) ((ret = ff_merge_ ## field(__VA_ARGS__)) <= 0)
480 #define MERGE_DISPATCH(field, ...) \
481 if (!(link->incfg.field && link->outcfg.field)) { \
483 } else if (link->incfg.field == link->outcfg.field) { \
484 count_already_merged++; \
485 } else if (!convert_needed) { \
487 if (CHECKED_MERGE(field, __VA_ARGS__)) { \
490 convert_needed = 1; \
494 if (link->type == AVMEDIA_TYPE_AUDIO) {
495 MERGE_DISPATCH(channel_layouts, link->incfg.channel_layouts,
496 link->outcfg.channel_layouts)
497 MERGE_DISPATCH(samplerates, link->incfg.samplerates,
498 link->outcfg.samplerates)
500 MERGE_DISPATCH(formats, link->incfg.formats,
501 link->outcfg.formats, link->type)
502 #undef MERGE_DISPATCH
504 if (convert_needed) {
505 AVFilterContext *convert;
506 const AVFilter *filter;
507 AVFilterLink *inlink, *outlink;
510 if (graph->disable_auto_convert) {
511 av_log(log_ctx, AV_LOG_ERROR,
512 "The filters '%s' and '%s' do not have a common format "
513 "and automatic conversion is disabled.\n",
514 link->src->name, link->dst->name);
515 return AVERROR(EINVAL);
518 /* couldn't merge format lists. auto-insert conversion filter */
519 switch (link->type) {
520 case AVMEDIA_TYPE_VIDEO:
521 if (!(filter = avfilter_get_by_name("scale"))) {
522 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
523 "not present, cannot convert pixel formats.\n");
524 return AVERROR(EINVAL);
527 snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
530 if ((ret = avfilter_graph_create_filter(&convert, filter,
531 inst_name, graph->scale_sws_opts, NULL,
535 case AVMEDIA_TYPE_AUDIO:
536 if (!(filter = avfilter_get_by_name("aresample"))) {
537 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
538 "not present, cannot convert audio formats.\n");
539 return AVERROR(EINVAL);
542 snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
544 if ((ret = avfilter_graph_create_filter(&convert, filter,
545 inst_name, graph->aresample_swr_opts,
550 return AVERROR(EINVAL);
553 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
556 if ((ret = filter_query_formats(convert)) < 0)
559 inlink = convert->inputs[0];
560 outlink = convert->outputs[0];
561 av_assert0( inlink->incfg.formats->refcount > 0);
562 av_assert0( inlink->outcfg.formats->refcount > 0);
563 av_assert0(outlink->incfg.formats->refcount > 0);
564 av_assert0(outlink->outcfg.formats->refcount > 0);
565 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
566 av_assert0( inlink-> incfg.samplerates->refcount > 0);
567 av_assert0( inlink->outcfg.samplerates->refcount > 0);
568 av_assert0(outlink-> incfg.samplerates->refcount > 0);
569 av_assert0(outlink->outcfg.samplerates->refcount > 0);
570 av_assert0( inlink-> incfg.channel_layouts->refcount > 0);
571 av_assert0( inlink->outcfg.channel_layouts->refcount > 0);
572 av_assert0(outlink-> incfg.channel_layouts->refcount > 0);
573 av_assert0(outlink->outcfg.channel_layouts->refcount > 0);
575 if (CHECKED_MERGE(formats, inlink->incfg.formats,
576 inlink->outcfg.formats, inlink->type) ||
577 CHECKED_MERGE(formats, outlink->incfg.formats,
578 outlink->outcfg.formats, outlink->type) ||
579 inlink->type == AVMEDIA_TYPE_AUDIO &&
580 (CHECKED_MERGE(samplerates, inlink->incfg.samplerates,
581 inlink->outcfg.samplerates) ||
582 CHECKED_MERGE(channel_layouts, inlink->incfg.channel_layouts,
583 inlink->outcfg.channel_layouts)) ||
584 outlink->type == AVMEDIA_TYPE_AUDIO &&
585 (CHECKED_MERGE(samplerates, outlink->incfg.samplerates,
586 outlink->outcfg.samplerates) ||
587 CHECKED_MERGE(channel_layouts, outlink->incfg.channel_layouts,
588 outlink->outcfg.channel_layouts))) {
591 av_log(log_ctx, AV_LOG_ERROR,
592 "Impossible to convert between the formats supported by the filter "
593 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
594 return AVERROR(ENOSYS);
600 av_log(graph, AV_LOG_DEBUG, "query_formats: "
601 "%d queried, %d merged, %d already done, %d delayed\n",
602 count_queried, count_merged, count_already_merged, count_delayed);
606 /* if count_queried > 0, one filter at least did set its formats,
607 that will give additional information to its neighbour;
608 if count_merged > 0, one pair of formats lists at least was merged,
609 that will give additional information to all connected filters;
610 in both cases, progress was made and a new round must be done */
611 if (count_queried || count_merged)
612 return AVERROR(EAGAIN);
613 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
614 for (i = 0; i < graph->nb_filters; i++)
615 if (!formats_declared(graph->filters[i]))
616 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
617 graph->filters[i]->name);
618 av_log(graph, AV_LOG_ERROR,
619 "The following filters could not choose their formats: %s\n"
620 "Consider inserting the (a)format filter near their input or "
621 "output.\n", bp.str);
627 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
631 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
634 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
635 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
637 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
639 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
640 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
643 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
644 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
650 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
651 enum AVSampleFormat src_fmt)
655 score1 = get_fmt_score(dst_fmt1, src_fmt);
656 score2 = get_fmt_score(dst_fmt2, src_fmt);
658 return score1 < score2 ? dst_fmt1 : dst_fmt2;
661 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
663 if (!link || !link->incfg.formats)
666 if (link->type == AVMEDIA_TYPE_VIDEO) {
667 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
668 //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
669 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
670 enum AVPixelFormat best= AV_PIX_FMT_NONE;
672 for (i = 0; i < link->incfg.formats->nb_formats; i++) {
673 enum AVPixelFormat p = link->incfg.formats->formats[i];
674 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
676 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
677 av_get_pix_fmt_name(best), link->incfg.formats->nb_formats,
678 av_get_pix_fmt_name(ref->format), has_alpha);
679 link->incfg.formats->formats[0] = best;
681 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
682 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
683 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
685 for (i = 0; i < link->incfg.formats->nb_formats; i++) {
686 enum AVSampleFormat p = link->incfg.formats->formats[i];
687 best = find_best_sample_fmt_of_2(best, p, ref->format);
689 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
690 av_get_sample_fmt_name(best), link->incfg.formats->nb_formats,
691 av_get_sample_fmt_name(ref->format));
692 link->incfg.formats->formats[0] = best;
696 link->incfg.formats->nb_formats = 1;
697 link->format = link->incfg.formats->formats[0];
699 if (link->type == AVMEDIA_TYPE_AUDIO) {
700 if (!link->incfg.samplerates->nb_formats) {
701 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
702 " the link between filters %s and %s.\n", link->src->name,
704 return AVERROR(EINVAL);
706 link->incfg.samplerates->nb_formats = 1;
707 link->sample_rate = link->incfg.samplerates->formats[0];
709 if (link->incfg.channel_layouts->all_layouts) {
710 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
711 " the link between filters %s and %s.\n", link->src->name,
713 if (!link->incfg.channel_layouts->all_counts)
714 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
715 "supported, try specifying a channel layout using "
716 "'aformat=channel_layouts=something'.\n");
717 return AVERROR(EINVAL);
719 link->incfg.channel_layouts->nb_channel_layouts = 1;
720 link->channel_layout = link->incfg.channel_layouts->channel_layouts[0];
721 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
722 link->channel_layout = 0;
724 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
727 ff_formats_unref(&link->incfg.formats);
728 ff_formats_unref(&link->outcfg.formats);
729 ff_formats_unref(&link->incfg.samplerates);
730 ff_formats_unref(&link->outcfg.samplerates);
731 ff_channel_layouts_unref(&link->incfg.channel_layouts);
732 ff_channel_layouts_unref(&link->outcfg.channel_layouts);
737 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
739 for (i = 0; i < filter->nb_inputs; i++) { \
740 AVFilterLink *link = filter->inputs[i]; \
743 if (!link->outcfg.list || link->outcfg.list->nb != 1) \
745 fmt = link->outcfg.list->var[0]; \
747 for (j = 0; j < filter->nb_outputs; j++) { \
748 AVFilterLink *out_link = filter->outputs[j]; \
751 if (link->type != out_link->type || \
752 out_link->incfg.list->nb == 1) \
754 fmts = out_link->incfg.list; \
756 if (!out_link->incfg.list->nb) { \
757 if ((ret = add_format(&out_link->incfg.list, fmt)) < 0)\
763 for (k = 0; k < out_link->incfg.list->nb; k++) \
764 if (fmts->var[k] == fmt) { \
765 fmts->var[0] = fmt; \
774 static int reduce_formats_on_filter(AVFilterContext *filter)
776 int i, j, k, ret = 0;
778 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
779 nb_formats, ff_add_format);
780 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
781 nb_formats, ff_add_format);
783 /* reduce channel layouts */
784 for (i = 0; i < filter->nb_inputs; i++) {
785 AVFilterLink *inlink = filter->inputs[i];
788 if (!inlink->outcfg.channel_layouts ||
789 inlink->outcfg.channel_layouts->nb_channel_layouts != 1)
791 fmt = inlink->outcfg.channel_layouts->channel_layouts[0];
793 for (j = 0; j < filter->nb_outputs; j++) {
794 AVFilterLink *outlink = filter->outputs[j];
795 AVFilterChannelLayouts *fmts;
797 fmts = outlink->incfg.channel_layouts;
798 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
801 if (fmts->all_layouts &&
802 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
803 /* Turn the infinite list into a singleton */
804 fmts->all_layouts = fmts->all_counts = 0;
805 if (ff_add_channel_layout(&outlink->incfg.channel_layouts, fmt) < 0)
810 for (k = 0; k < outlink->incfg.channel_layouts->nb_channel_layouts; k++) {
811 if (fmts->channel_layouts[k] == fmt) {
812 fmts->channel_layouts[0] = fmt;
813 fmts->nb_channel_layouts = 1;
824 static int reduce_formats(AVFilterGraph *graph)
831 for (i = 0; i < graph->nb_filters; i++) {
832 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
841 static void swap_samplerates_on_filter(AVFilterContext *filter)
843 AVFilterLink *link = NULL;
847 for (i = 0; i < filter->nb_inputs; i++) {
848 link = filter->inputs[i];
850 if (link->type == AVMEDIA_TYPE_AUDIO &&
851 link->outcfg.samplerates->nb_formats== 1)
854 if (i == filter->nb_inputs)
857 sample_rate = link->outcfg.samplerates->formats[0];
859 for (i = 0; i < filter->nb_outputs; i++) {
860 AVFilterLink *outlink = filter->outputs[i];
861 int best_idx, best_diff = INT_MAX;
863 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
864 outlink->incfg.samplerates->nb_formats < 2)
867 for (j = 0; j < outlink->incfg.samplerates->nb_formats; j++) {
868 int diff = abs(sample_rate - outlink->incfg.samplerates->formats[j]);
870 av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
872 if (diff < best_diff) {
877 FFSWAP(int, outlink->incfg.samplerates->formats[0],
878 outlink->incfg.samplerates->formats[best_idx]);
882 static void swap_samplerates(AVFilterGraph *graph)
886 for (i = 0; i < graph->nb_filters; i++)
887 swap_samplerates_on_filter(graph->filters[i]);
890 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
891 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
892 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
893 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
894 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
895 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
896 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
898 /* allowable substitutions for channel pairs when comparing layouts,
899 * ordered by priority for both values */
900 static const uint64_t ch_subst[][2] = {
901 { CH_FRONT_PAIR, CH_CENTER_PAIR },
902 { CH_FRONT_PAIR, CH_WIDE_PAIR },
903 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
904 { CH_CENTER_PAIR, CH_FRONT_PAIR },
905 { CH_CENTER_PAIR, CH_WIDE_PAIR },
906 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
907 { CH_WIDE_PAIR, CH_FRONT_PAIR },
908 { CH_WIDE_PAIR, CH_CENTER_PAIR },
909 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
910 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
911 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
912 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
913 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
914 { CH_SIDE_PAIR, CH_BACK_PAIR },
915 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
916 { CH_BACK_PAIR, CH_DIRECT_PAIR },
917 { CH_BACK_PAIR, CH_SIDE_PAIR },
918 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
919 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
920 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
921 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
924 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
926 AVFilterLink *link = NULL;
929 for (i = 0; i < filter->nb_inputs; i++) {
930 link = filter->inputs[i];
932 if (link->type == AVMEDIA_TYPE_AUDIO &&
933 link->outcfg.channel_layouts->nb_channel_layouts == 1)
936 if (i == filter->nb_inputs)
939 for (i = 0; i < filter->nb_outputs; i++) {
940 AVFilterLink *outlink = filter->outputs[i];
941 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
943 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
944 outlink->incfg.channel_layouts->nb_channel_layouts < 2)
947 for (j = 0; j < outlink->incfg.channel_layouts->nb_channel_layouts; j++) {
948 uint64_t in_chlayout = link->outcfg.channel_layouts->channel_layouts[0];
949 uint64_t out_chlayout = outlink->incfg.channel_layouts->channel_layouts[j];
950 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
951 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
952 int count_diff = out_channels - in_channels;
953 int matched_channels, extra_channels;
956 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
957 /* Compute score in case the input or output layout encodes
958 a channel count; in this case the score is not altered by
959 the computation afterwards, as in_chlayout and
960 out_chlayout have both been set to 0 */
961 if (FF_LAYOUT2COUNT(in_chlayout))
962 in_channels = FF_LAYOUT2COUNT(in_chlayout);
963 if (FF_LAYOUT2COUNT(out_chlayout))
964 out_channels = FF_LAYOUT2COUNT(out_chlayout);
965 score -= 10000 + FFABS(out_channels - in_channels) +
966 (in_channels > out_channels ? 10000 : 0);
967 in_chlayout = out_chlayout = 0;
968 /* Let the remaining computation run, even if the score
969 value is not altered */
972 /* channel substitution */
973 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
974 uint64_t cmp0 = ch_subst[k][0];
975 uint64_t cmp1 = ch_subst[k][1];
976 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
977 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
978 in_chlayout &= ~cmp0;
979 out_chlayout &= ~cmp1;
980 /* add score for channel match, minus a deduction for
981 having to do the substitution */
982 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
986 /* no penalty for LFE channel mismatch */
987 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
988 (out_chlayout & AV_CH_LOW_FREQUENCY))
990 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
991 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
993 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
995 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
997 score += 10 * matched_channels - 5 * extra_channels;
999 if (score > best_score ||
1000 (count_diff < best_count_diff && score == best_score)) {
1003 best_count_diff = count_diff;
1006 av_assert0(best_idx >= 0);
1007 FFSWAP(uint64_t, outlink->incfg.channel_layouts->channel_layouts[0],
1008 outlink->incfg.channel_layouts->channel_layouts[best_idx]);
1013 static void swap_channel_layouts(AVFilterGraph *graph)
1017 for (i = 0; i < graph->nb_filters; i++)
1018 swap_channel_layouts_on_filter(graph->filters[i]);
1021 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1023 AVFilterLink *link = NULL;
1027 for (i = 0; i < filter->nb_inputs; i++) {
1028 link = filter->inputs[i];
1030 if (link->type == AVMEDIA_TYPE_AUDIO &&
1031 link->outcfg.formats->nb_formats == 1)
1034 if (i == filter->nb_inputs)
1037 format = link->outcfg.formats->formats[0];
1038 bps = av_get_bytes_per_sample(format);
1040 for (i = 0; i < filter->nb_outputs; i++) {
1041 AVFilterLink *outlink = filter->outputs[i];
1042 int best_idx = -1, best_score = INT_MIN;
1044 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1045 outlink->incfg.formats->nb_formats < 2)
1048 for (j = 0; j < outlink->incfg.formats->nb_formats; j++) {
1049 int out_format = outlink->incfg.formats->formats[j];
1050 int out_bps = av_get_bytes_per_sample(out_format);
1053 if (av_get_packed_sample_fmt(out_format) == format ||
1054 av_get_planar_sample_fmt(out_format) == format) {
1059 /* for s32 and float prefer double to prevent loss of information */
1060 if (bps == 4 && out_bps == 8) {
1065 /* prefer closest higher or equal bps */
1066 score = -abs(out_bps - bps);
1070 if (score > best_score) {
1075 av_assert0(best_idx >= 0);
1076 FFSWAP(int, outlink->incfg.formats->formats[0],
1077 outlink->incfg.formats->formats[best_idx]);
1081 static void swap_sample_fmts(AVFilterGraph *graph)
1085 for (i = 0; i < graph->nb_filters; i++)
1086 swap_sample_fmts_on_filter(graph->filters[i]);
1090 static int pick_formats(AVFilterGraph *graph)
1097 for (i = 0; i < graph->nb_filters; i++) {
1098 AVFilterContext *filter = graph->filters[i];
1099 if (filter->nb_inputs){
1100 for (j = 0; j < filter->nb_inputs; j++){
1101 if (filter->inputs[j]->incfg.formats && filter->inputs[j]->incfg.formats->nb_formats == 1) {
1102 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1108 if (filter->nb_outputs){
1109 for (j = 0; j < filter->nb_outputs; j++){
1110 if (filter->outputs[j]->incfg.formats && filter->outputs[j]->incfg.formats->nb_formats == 1) {
1111 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1117 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1118 for (j = 0; j < filter->nb_outputs; j++) {
1119 if (filter->outputs[j]->format<0) {
1120 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1129 for (i = 0; i < graph->nb_filters; i++) {
1130 AVFilterContext *filter = graph->filters[i];
1132 for (j = 0; j < filter->nb_inputs; j++)
1133 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1135 for (j = 0; j < filter->nb_outputs; j++)
1136 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1143 * Configure the formats of all the links in the graph.
1145 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1149 /* find supported formats from sub-filters, and merge along links */
1150 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1151 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1155 /* Once everything is merged, it's possible that we'll still have
1156 * multiple valid media format choices. We try to minimize the amount
1157 * of format conversion inside filters */
1158 if ((ret = reduce_formats(graph)) < 0)
1161 /* for audio filters, ensure the best format, sample rate and channel layout
1163 swap_sample_fmts(graph);
1164 swap_samplerates(graph);
1165 swap_channel_layouts(graph);
1167 if ((ret = pick_formats(graph)) < 0)
1173 static int graph_config_pointers(AVFilterGraph *graph,
1177 int sink_links_count = 0, n = 0;
1179 AVFilterLink **sinks;
1181 for (i = 0; i < graph->nb_filters; i++) {
1182 f = graph->filters[i];
1183 for (j = 0; j < f->nb_inputs; j++) {
1184 f->inputs[j]->graph = graph;
1185 f->inputs[j]->age_index = -1;
1187 for (j = 0; j < f->nb_outputs; j++) {
1188 f->outputs[j]->graph = graph;
1189 f->outputs[j]->age_index= -1;
1191 if (!f->nb_outputs) {
1192 if (f->nb_inputs > INT_MAX - sink_links_count)
1193 return AVERROR(EINVAL);
1194 sink_links_count += f->nb_inputs;
1197 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1199 return AVERROR(ENOMEM);
1200 for (i = 0; i < graph->nb_filters; i++) {
1201 f = graph->filters[i];
1202 if (!f->nb_outputs) {
1203 for (j = 0; j < f->nb_inputs; j++) {
1204 sinks[n] = f->inputs[j];
1205 f->inputs[j]->age_index = n++;
1209 av_assert0(n == sink_links_count);
1210 graph->sink_links = sinks;
1211 graph->sink_links_count = sink_links_count;
1215 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1219 if ((ret = graph_check_validity(graphctx, log_ctx)))
1221 if ((ret = graph_config_formats(graphctx, log_ctx)))
1223 if ((ret = graph_config_links(graphctx, log_ctx)))
1225 if ((ret = graph_check_links(graphctx, log_ctx)))
1227 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1233 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1235 int i, r = AVERROR(ENOSYS);
1240 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1241 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1242 if (r != AVERROR(ENOSYS))
1249 for (i = 0; i < graph->nb_filters; i++) {
1250 AVFilterContext *filter = graph->filters[i];
1251 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1252 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1253 if (r != AVERROR(ENOSYS)) {
1254 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1263 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1270 for (i = 0; i < graph->nb_filters; i++) {
1271 AVFilterContext *filter = graph->filters[i];
1272 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1273 AVFilterCommand **queue = &filter->command_queue, *next;
1274 while (*queue && (*queue)->time <= ts)
1275 queue = &(*queue)->next;
1277 *queue = av_mallocz(sizeof(AVFilterCommand));
1279 return AVERROR(ENOMEM);
1281 (*queue)->command = av_strdup(command);
1282 (*queue)->arg = av_strdup(arg);
1283 (*queue)->time = ts;
1284 (*queue)->flags = flags;
1285 (*queue)->next = next;
1286 if(flags & AVFILTER_CMD_FLAG_ONE)
1294 static void heap_bubble_up(AVFilterGraph *graph,
1295 AVFilterLink *link, int index)
1297 AVFilterLink **links = graph->sink_links;
1299 av_assert0(index >= 0);
1302 int parent = (index - 1) >> 1;
1303 if (links[parent]->current_pts_us >= link->current_pts_us)
1305 links[index] = links[parent];
1306 links[index]->age_index = index;
1309 links[index] = link;
1310 link->age_index = index;
1313 static void heap_bubble_down(AVFilterGraph *graph,
1314 AVFilterLink *link, int index)
1316 AVFilterLink **links = graph->sink_links;
1318 av_assert0(index >= 0);
1321 int child = 2 * index + 1;
1322 if (child >= graph->sink_links_count)
1324 if (child + 1 < graph->sink_links_count &&
1325 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1327 if (link->current_pts_us < links[child]->current_pts_us)
1329 links[index] = links[child];
1330 links[index]->age_index = index;
1333 links[index] = link;
1334 link->age_index = index;
1337 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1339 heap_bubble_up (graph, link, link->age_index);
1340 heap_bubble_down(graph, link, link->age_index);
1343 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1345 AVFilterLink *oldest = graph->sink_links[0];
1346 int64_t frame_count;
1349 while (graph->sink_links_count) {
1350 oldest = graph->sink_links[0];
1351 if (oldest->dst->filter->activate) {
1352 /* For now, buffersink is the only filter implementing activate. */
1353 r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1354 AV_BUFFERSINK_FLAG_PEEK);
1355 if (r != AVERROR_EOF)
1358 r = ff_request_frame(oldest);
1360 if (r != AVERROR_EOF)
1362 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1363 oldest->dst ? oldest->dst->name : "unknown",
1364 oldest->dstpad ? oldest->dstpad->name : "unknown");
1365 /* EOF: remove the link from the heap */
1366 if (oldest->age_index < --graph->sink_links_count)
1367 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1369 oldest->age_index = -1;
1371 if (!graph->sink_links_count)
1373 av_assert1(!oldest->dst->filter->activate);
1374 av_assert1(oldest->age_index >= 0);
1375 frame_count = oldest->frame_count_out;
1376 while (frame_count == oldest->frame_count_out) {
1377 r = ff_filter_graph_run_once(graph);
1378 if (r == AVERROR(EAGAIN) &&
1379 !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1381 ff_request_frame(oldest);
1388 int ff_filter_graph_run_once(AVFilterGraph *graph)
1390 AVFilterContext *filter;
1393 av_assert0(graph->nb_filters);
1394 filter = graph->filters[0];
1395 for (i = 1; i < graph->nb_filters; i++)
1396 if (graph->filters[i]->ready > filter->ready)
1397 filter = graph->filters[i];
1399 return AVERROR(EAGAIN);
1400 return ff_filter_activate(filter);