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]);
102 filter->graph = NULL;
103 for (j = 0; j<filter->nb_outputs; j++)
104 if (filter->outputs[j])
105 filter->outputs[j]->graph = NULL;
112 void avfilter_graph_free(AVFilterGraph **graph)
117 while ((*graph)->nb_filters)
118 avfilter_free((*graph)->filters[0]);
120 ff_graph_thread_free(*graph);
122 av_freep(&(*graph)->sink_links);
124 av_freep(&(*graph)->scale_sws_opts);
125 av_freep(&(*graph)->aresample_swr_opts);
126 av_freep(&(*graph)->resample_lavr_opts);
127 av_freep(&(*graph)->filters);
128 av_freep(&(*graph)->internal);
132 #if FF_API_AVFILTER_OPEN
133 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
135 AVFilterContext **filters = av_realloc(graph->filters,
136 sizeof(*filters) * (graph->nb_filters + 1));
138 return AVERROR(ENOMEM);
140 graph->filters = filters;
141 graph->filters[graph->nb_filters++] = filter;
143 filter->graph = graph;
149 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
150 const char *name, const char *args, void *opaque,
151 AVFilterGraph *graph_ctx)
155 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
157 return AVERROR(ENOMEM);
159 ret = avfilter_init_str(*filt_ctx, args);
167 avfilter_free(*filt_ctx);
172 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
174 graph->disable_auto_convert = flags;
177 AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
178 const AVFilter *filter,
181 AVFilterContext **filters, *s;
183 if (graph->thread_type && !graph->internal->thread_execute) {
184 if (graph->execute) {
185 graph->internal->thread_execute = graph->execute;
187 int ret = ff_graph_thread_init(graph);
189 av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
195 s = ff_filter_alloc(filter, name);
199 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
205 graph->filters = filters;
206 graph->filters[graph->nb_filters++] = s;
214 * Check for the validity of graph.
216 * A graph is considered valid if all its input and output pads are
219 * @return >= 0 in case of success, a negative value otherwise
221 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
223 AVFilterContext *filt;
226 for (i = 0; i < graph->nb_filters; i++) {
227 const AVFilterPad *pad;
228 filt = graph->filters[i];
230 for (j = 0; j < filt->nb_inputs; j++) {
231 if (!filt->inputs[j] || !filt->inputs[j]->src) {
232 pad = &filt->input_pads[j];
233 av_log(log_ctx, AV_LOG_ERROR,
234 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
235 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
236 return AVERROR(EINVAL);
240 for (j = 0; j < filt->nb_outputs; j++) {
241 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
242 pad = &filt->output_pads[j];
243 av_log(log_ctx, AV_LOG_ERROR,
244 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
245 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
246 return AVERROR(EINVAL);
255 * Configure all the links of graphctx.
257 * @return >= 0 in case of success, a negative value otherwise
259 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
261 AVFilterContext *filt;
264 for (i = 0; i < graph->nb_filters; i++) {
265 filt = graph->filters[i];
267 if (!filt->nb_outputs) {
268 if ((ret = avfilter_config_links(filt)))
276 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
280 for (i = 0; i < graph->nb_filters; i++)
281 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
282 return graph->filters[i];
287 static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
291 if (l->nb_channel_layouts) {
292 if (l->all_layouts || l->all_counts)
293 av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
294 l->all_layouts = l->all_counts = 0;
296 if (l->all_counts && !l->all_layouts)
297 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
302 static int filter_query_formats(AVFilterContext *ctx)
305 AVFilterFormats *formats;
306 AVFilterChannelLayouts *chlayouts;
307 AVFilterFormats *samplerates;
308 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
309 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
312 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
313 if (ret != AVERROR(EAGAIN))
314 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
315 ctx->name, av_err2str(ret));
319 for (i = 0; i < ctx->nb_inputs; i++)
320 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
321 for (i = 0; i < ctx->nb_outputs; i++)
322 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
324 formats = ff_all_formats(type);
325 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
327 if (type == AVMEDIA_TYPE_AUDIO) {
328 samplerates = ff_all_samplerates();
329 if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
331 chlayouts = ff_all_channel_layouts();
332 if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
338 static int formats_declared(AVFilterContext *f)
342 for (i = 0; i < f->nb_inputs; i++) {
343 if (!f->inputs[i]->out_formats)
345 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
346 !(f->inputs[i]->out_samplerates &&
347 f->inputs[i]->out_channel_layouts))
350 for (i = 0; i < f->nb_outputs; i++) {
351 if (!f->outputs[i]->in_formats)
353 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
354 !(f->outputs[i]->in_samplerates &&
355 f->outputs[i]->in_channel_layouts))
361 static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
363 AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
367 a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
368 if (!a->formats && arg->formats)
374 static int can_merge_formats(AVFilterFormats *a_arg,
375 AVFilterFormats *b_arg,
376 enum AVMediaType type,
379 AVFilterFormats *a, *b, *ret;
382 a = clone_filter_formats(a_arg);
383 b = clone_filter_formats(b_arg);
387 av_freep(&a->formats);
389 av_freep(&b->formats);
397 if (is_sample_rate) {
398 ret = ff_merge_samplerates(a, b);
400 ret = ff_merge_formats(a, b, type);
403 av_freep(&ret->formats);
404 av_freep(&ret->refs);
408 av_freep(&a->formats);
409 av_freep(&b->formats);
417 * Perform one round of query_formats() and merging formats lists on the
419 * @return >=0 if all links formats lists could be queried and merged;
420 * AVERROR(EAGAIN) some progress was made in the queries or merging
421 * and a later call may succeed;
422 * AVERROR(EIO) (may be changed) plus a log message if no progress
423 * was made and the negotiation is stuck;
424 * a negative error code if some other error happened
426 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
429 int scaler_count = 0, resampler_count = 0;
430 int count_queried = 0; /* successful calls to query_formats() */
431 int count_merged = 0; /* successful merge of formats lists */
432 int count_already_merged = 0; /* lists already merged */
433 int count_delayed = 0; /* lists that need to be merged later */
435 for (i = 0; i < graph->nb_filters; i++) {
436 AVFilterContext *f = graph->filters[i];
437 if (formats_declared(f))
439 if (f->filter->query_formats)
440 ret = filter_query_formats(f);
442 ret = ff_default_query_formats(f);
443 if (ret < 0 && ret != AVERROR(EAGAIN))
445 /* note: EAGAIN could indicate a partial success, not counted yet */
446 count_queried += ret >= 0;
449 /* go through and merge as many format lists as possible */
450 for (i = 0; i < graph->nb_filters; i++) {
451 AVFilterContext *filter = graph->filters[i];
453 for (j = 0; j < filter->nb_inputs; j++) {
454 AVFilterLink *link = filter->inputs[j];
455 int convert_needed = 0;
460 if (link->in_formats != link->out_formats
461 && link->in_formats && link->out_formats)
462 if (!can_merge_formats(link->in_formats, link->out_formats,
465 if (link->type == AVMEDIA_TYPE_AUDIO) {
466 if (link->in_samplerates != link->out_samplerates
467 && link->in_samplerates && link->out_samplerates)
468 if (!can_merge_formats(link->in_samplerates,
469 link->out_samplerates,
474 #define MERGE_DISPATCH(field, statement) \
475 if (!(link->in_ ## field && link->out_ ## field)) { \
477 } else if (link->in_ ## field == link->out_ ## field) { \
478 count_already_merged++; \
479 } else if (!convert_needed) { \
484 if (link->type == AVMEDIA_TYPE_AUDIO) {
485 MERGE_DISPATCH(channel_layouts,
486 if (!ff_merge_channel_layouts(link->in_channel_layouts,
487 link->out_channel_layouts))
490 MERGE_DISPATCH(samplerates,
491 if (!ff_merge_samplerates(link->in_samplerates,
492 link->out_samplerates))
496 MERGE_DISPATCH(formats,
497 if (!ff_merge_formats(link->in_formats, link->out_formats,
501 #undef MERGE_DISPATCH
503 if (convert_needed) {
504 AVFilterContext *convert;
506 AVFilterLink *inlink, *outlink;
507 char scale_args[256];
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-inserted 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-inserted resampler %d",
544 scale_args[0] = '\0';
545 if (graph->aresample_swr_opts)
546 snprintf(scale_args, sizeof(scale_args), "%s",
547 graph->aresample_swr_opts);
548 if ((ret = avfilter_graph_create_filter(&convert, filter,
549 inst_name, graph->aresample_swr_opts,
554 return AVERROR(EINVAL);
557 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
560 if ((ret = filter_query_formats(convert)) < 0)
563 inlink = convert->inputs[0];
564 outlink = convert->outputs[0];
565 av_assert0( inlink-> in_formats->refcount > 0);
566 av_assert0( inlink->out_formats->refcount > 0);
567 av_assert0(outlink-> in_formats->refcount > 0);
568 av_assert0(outlink->out_formats->refcount > 0);
569 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
570 av_assert0( inlink-> in_samplerates->refcount > 0);
571 av_assert0( inlink->out_samplerates->refcount > 0);
572 av_assert0(outlink-> in_samplerates->refcount > 0);
573 av_assert0(outlink->out_samplerates->refcount > 0);
574 av_assert0( inlink-> in_channel_layouts->refcount > 0);
575 av_assert0( inlink->out_channel_layouts->refcount > 0);
576 av_assert0(outlink-> in_channel_layouts->refcount > 0);
577 av_assert0(outlink->out_channel_layouts->refcount > 0);
579 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
580 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
581 ret = AVERROR(ENOSYS);
582 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
583 (!ff_merge_samplerates(inlink->in_samplerates,
584 inlink->out_samplerates) ||
585 !ff_merge_channel_layouts(inlink->in_channel_layouts,
586 inlink->out_channel_layouts)))
587 ret = AVERROR(ENOSYS);
588 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
589 (!ff_merge_samplerates(outlink->in_samplerates,
590 outlink->out_samplerates) ||
591 !ff_merge_channel_layouts(outlink->in_channel_layouts,
592 outlink->out_channel_layouts)))
593 ret = AVERROR(ENOSYS);
596 av_log(log_ctx, AV_LOG_ERROR,
597 "Impossible to convert between the formats supported by the filter "
598 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
605 av_log(graph, AV_LOG_DEBUG, "query_formats: "
606 "%d queried, %d merged, %d already done, %d delayed\n",
607 count_queried, count_merged, count_already_merged, count_delayed);
611 /* if count_queried > 0, one filter at least did set its formats,
612 that will give additional information to its neighbour;
613 if count_merged > 0, one pair of formats lists at least was merged,
614 that will give additional information to all connected filters;
615 in both cases, progress was made and a new round must be done */
616 if (count_queried || count_merged)
617 return AVERROR(EAGAIN);
618 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
619 for (i = 0; i < graph->nb_filters; i++)
620 if (!formats_declared(graph->filters[i]))
621 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
622 graph->filters[i]->name);
623 av_log(graph, AV_LOG_ERROR,
624 "The following filters could not choose their formats: %s\n"
625 "Consider inserting the (a)format filter near their input or "
626 "output.\n", bp.str);
632 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
636 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
639 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
640 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
642 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
644 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
645 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
648 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
649 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
655 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
656 enum AVSampleFormat src_fmt)
660 score1 = get_fmt_score(dst_fmt1, src_fmt);
661 score2 = get_fmt_score(dst_fmt2, src_fmt);
663 return score1 < score2 ? dst_fmt1 : dst_fmt2;
666 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
668 if (!link || !link->in_formats)
671 if (link->type == AVMEDIA_TYPE_VIDEO) {
672 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
673 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
674 enum AVPixelFormat best= AV_PIX_FMT_NONE;
676 for (i=0; i<link->in_formats->nb_formats; i++) {
677 enum AVPixelFormat p = link->in_formats->formats[i];
678 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
680 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
681 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
682 av_get_pix_fmt_name(ref->format), has_alpha);
683 link->in_formats->formats[0] = best;
685 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
686 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
687 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
689 for (i=0; i<link->in_formats->nb_formats; i++) {
690 enum AVSampleFormat p = link->in_formats->formats[i];
691 best = find_best_sample_fmt_of_2(best, p, ref->format);
693 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
694 av_get_sample_fmt_name(best), link->in_formats->nb_formats,
695 av_get_sample_fmt_name(ref->format));
696 link->in_formats->formats[0] = best;
700 link->in_formats->nb_formats = 1;
701 link->format = link->in_formats->formats[0];
703 if (link->type == AVMEDIA_TYPE_AUDIO) {
704 if (!link->in_samplerates->nb_formats) {
705 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
706 " the link between filters %s and %s.\n", link->src->name,
708 return AVERROR(EINVAL);
710 link->in_samplerates->nb_formats = 1;
711 link->sample_rate = link->in_samplerates->formats[0];
713 if (link->in_channel_layouts->all_layouts) {
714 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
715 " the link between filters %s and %s.\n", link->src->name,
717 if (!link->in_channel_layouts->all_counts)
718 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
719 "supported, try specifying a channel layout using "
720 "'aformat=channel_layouts=something'.\n");
721 return AVERROR(EINVAL);
723 link->in_channel_layouts->nb_channel_layouts = 1;
724 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
725 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
726 link->channel_layout = 0;
728 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
731 ff_formats_unref(&link->in_formats);
732 ff_formats_unref(&link->out_formats);
733 ff_formats_unref(&link->in_samplerates);
734 ff_formats_unref(&link->out_samplerates);
735 ff_channel_layouts_unref(&link->in_channel_layouts);
736 ff_channel_layouts_unref(&link->out_channel_layouts);
741 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
743 for (i = 0; i < filter->nb_inputs; i++) { \
744 AVFilterLink *link = filter->inputs[i]; \
747 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
749 fmt = link->out_ ## list->var[0]; \
751 for (j = 0; j < filter->nb_outputs; j++) { \
752 AVFilterLink *out_link = filter->outputs[j]; \
755 if (link->type != out_link->type || \
756 out_link->in_ ## list->nb == 1) \
758 fmts = out_link->in_ ## list; \
760 if (!out_link->in_ ## list->nb) { \
761 if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
767 for (k = 0; k < out_link->in_ ## list->nb; k++) \
768 if (fmts->var[k] == fmt) { \
769 fmts->var[0] = fmt; \
778 static int reduce_formats_on_filter(AVFilterContext *filter)
780 int i, j, k, ret = 0;
782 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
783 nb_formats, ff_add_format, ff_formats_unref);
784 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
785 nb_formats, ff_add_format, ff_formats_unref);
787 /* reduce channel layouts */
788 for (i = 0; i < filter->nb_inputs; i++) {
789 AVFilterLink *inlink = filter->inputs[i];
792 if (!inlink->out_channel_layouts ||
793 inlink->out_channel_layouts->nb_channel_layouts != 1)
795 fmt = inlink->out_channel_layouts->channel_layouts[0];
797 for (j = 0; j < filter->nb_outputs; j++) {
798 AVFilterLink *outlink = filter->outputs[j];
799 AVFilterChannelLayouts *fmts;
801 fmts = outlink->in_channel_layouts;
802 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
805 if (fmts->all_layouts &&
806 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
807 /* Turn the infinite list into a singleton */
808 fmts->all_layouts = fmts->all_counts = 0;
809 if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
814 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
815 if (fmts->channel_layouts[k] == fmt) {
816 fmts->channel_layouts[0] = fmt;
817 fmts->nb_channel_layouts = 1;
828 static int reduce_formats(AVFilterGraph *graph)
835 for (i = 0; i < graph->nb_filters; i++) {
836 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
845 static void swap_samplerates_on_filter(AVFilterContext *filter)
847 AVFilterLink *link = NULL;
851 for (i = 0; i < filter->nb_inputs; i++) {
852 link = filter->inputs[i];
854 if (link->type == AVMEDIA_TYPE_AUDIO &&
855 link->out_samplerates->nb_formats== 1)
858 if (i == filter->nb_inputs)
861 sample_rate = link->out_samplerates->formats[0];
863 for (i = 0; i < filter->nb_outputs; i++) {
864 AVFilterLink *outlink = filter->outputs[i];
865 int best_idx, best_diff = INT_MAX;
867 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
868 outlink->in_samplerates->nb_formats < 2)
871 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
872 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
874 if (diff < best_diff) {
879 FFSWAP(int, outlink->in_samplerates->formats[0],
880 outlink->in_samplerates->formats[best_idx]);
884 static void swap_samplerates(AVFilterGraph *graph)
888 for (i = 0; i < graph->nb_filters; i++)
889 swap_samplerates_on_filter(graph->filters[i]);
892 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
893 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
894 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
895 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
896 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
897 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
898 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
900 /* allowable substitutions for channel pairs when comparing layouts,
901 * ordered by priority for both values */
902 static const uint64_t ch_subst[][2] = {
903 { CH_FRONT_PAIR, CH_CENTER_PAIR },
904 { CH_FRONT_PAIR, CH_WIDE_PAIR },
905 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
906 { CH_CENTER_PAIR, CH_FRONT_PAIR },
907 { CH_CENTER_PAIR, CH_WIDE_PAIR },
908 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
909 { CH_WIDE_PAIR, CH_FRONT_PAIR },
910 { CH_WIDE_PAIR, CH_CENTER_PAIR },
911 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
912 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
913 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
914 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
915 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
916 { CH_SIDE_PAIR, CH_BACK_PAIR },
917 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
918 { CH_BACK_PAIR, CH_DIRECT_PAIR },
919 { CH_BACK_PAIR, CH_SIDE_PAIR },
920 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
921 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
922 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
923 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
926 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
928 AVFilterLink *link = NULL;
931 for (i = 0; i < filter->nb_inputs; i++) {
932 link = filter->inputs[i];
934 if (link->type == AVMEDIA_TYPE_AUDIO &&
935 link->out_channel_layouts->nb_channel_layouts == 1)
938 if (i == filter->nb_inputs)
941 for (i = 0; i < filter->nb_outputs; i++) {
942 AVFilterLink *outlink = filter->outputs[i];
943 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
945 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
946 outlink->in_channel_layouts->nb_channel_layouts < 2)
949 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
950 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
951 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
952 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
953 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
954 int count_diff = out_channels - in_channels;
955 int matched_channels, extra_channels;
958 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
959 /* Compute score in case the input or output layout encodes
960 a channel count; in this case the score is not altered by
961 the computation afterwards, as in_chlayout and
962 out_chlayout have both been set to 0 */
963 if (FF_LAYOUT2COUNT(in_chlayout))
964 in_channels = FF_LAYOUT2COUNT(in_chlayout);
965 if (FF_LAYOUT2COUNT(out_chlayout))
966 out_channels = FF_LAYOUT2COUNT(out_chlayout);
967 score -= 10000 + FFABS(out_channels - in_channels) +
968 (in_channels > out_channels ? 10000 : 0);
969 in_chlayout = out_chlayout = 0;
970 /* Let the remaining computation run, even if the score
971 value is not altered */
974 /* channel substitution */
975 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
976 uint64_t cmp0 = ch_subst[k][0];
977 uint64_t cmp1 = ch_subst[k][1];
978 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
979 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
980 in_chlayout &= ~cmp0;
981 out_chlayout &= ~cmp1;
982 /* add score for channel match, minus a deduction for
983 having to do the substitution */
984 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
988 /* no penalty for LFE channel mismatch */
989 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
990 (out_chlayout & AV_CH_LOW_FREQUENCY))
992 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
993 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
995 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
997 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
999 score += 10 * matched_channels - 5 * extra_channels;
1001 if (score > best_score ||
1002 (count_diff < best_count_diff && score == best_score)) {
1005 best_count_diff = count_diff;
1008 av_assert0(best_idx >= 0);
1009 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1010 outlink->in_channel_layouts->channel_layouts[best_idx]);
1015 static void swap_channel_layouts(AVFilterGraph *graph)
1019 for (i = 0; i < graph->nb_filters; i++)
1020 swap_channel_layouts_on_filter(graph->filters[i]);
1023 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1025 AVFilterLink *link = NULL;
1029 for (i = 0; i < filter->nb_inputs; i++) {
1030 link = filter->inputs[i];
1032 if (link->type == AVMEDIA_TYPE_AUDIO &&
1033 link->out_formats->nb_formats == 1)
1036 if (i == filter->nb_inputs)
1039 format = link->out_formats->formats[0];
1040 bps = av_get_bytes_per_sample(format);
1042 for (i = 0; i < filter->nb_outputs; i++) {
1043 AVFilterLink *outlink = filter->outputs[i];
1044 int best_idx = -1, best_score = INT_MIN;
1046 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1047 outlink->in_formats->nb_formats < 2)
1050 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1051 int out_format = outlink->in_formats->formats[j];
1052 int out_bps = av_get_bytes_per_sample(out_format);
1055 if (av_get_packed_sample_fmt(out_format) == format ||
1056 av_get_planar_sample_fmt(out_format) == format) {
1061 /* for s32 and float prefer double to prevent loss of information */
1062 if (bps == 4 && out_bps == 8) {
1067 /* prefer closest higher or equal bps */
1068 score = -abs(out_bps - bps);
1072 if (score > best_score) {
1077 av_assert0(best_idx >= 0);
1078 FFSWAP(int, outlink->in_formats->formats[0],
1079 outlink->in_formats->formats[best_idx]);
1083 static void swap_sample_fmts(AVFilterGraph *graph)
1087 for (i = 0; i < graph->nb_filters; i++)
1088 swap_sample_fmts_on_filter(graph->filters[i]);
1092 static int pick_formats(AVFilterGraph *graph)
1099 for (i = 0; i < graph->nb_filters; i++) {
1100 AVFilterContext *filter = graph->filters[i];
1101 if (filter->nb_inputs){
1102 for (j = 0; j < filter->nb_inputs; j++){
1103 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1104 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1110 if (filter->nb_outputs){
1111 for (j = 0; j < filter->nb_outputs; j++){
1112 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1113 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1119 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1120 for (j = 0; j < filter->nb_outputs; j++) {
1121 if(filter->outputs[j]->format<0) {
1122 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1131 for (i = 0; i < graph->nb_filters; i++) {
1132 AVFilterContext *filter = graph->filters[i];
1134 for (j = 0; j < filter->nb_inputs; j++)
1135 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1137 for (j = 0; j < filter->nb_outputs; j++)
1138 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1145 * Configure the formats of all the links in the graph.
1147 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1151 /* find supported formats from sub-filters, and merge along links */
1152 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1153 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1157 /* Once everything is merged, it's possible that we'll still have
1158 * multiple valid media format choices. We try to minimize the amount
1159 * of format conversion inside filters */
1160 if ((ret = reduce_formats(graph)) < 0)
1163 /* for audio filters, ensure the best format, sample rate and channel layout
1165 swap_sample_fmts(graph);
1166 swap_samplerates(graph);
1167 swap_channel_layouts(graph);
1169 if ((ret = pick_formats(graph)) < 0)
1175 static int graph_config_pointers(AVFilterGraph *graph,
1179 int sink_links_count = 0, n = 0;
1181 AVFilterLink **sinks;
1183 for (i = 0; i < graph->nb_filters; i++) {
1184 f = graph->filters[i];
1185 for (j = 0; j < f->nb_inputs; j++) {
1186 f->inputs[j]->graph = graph;
1187 f->inputs[j]->age_index = -1;
1189 for (j = 0; j < f->nb_outputs; j++) {
1190 f->outputs[j]->graph = graph;
1191 f->outputs[j]->age_index= -1;
1193 if (!f->nb_outputs) {
1194 if (f->nb_inputs > INT_MAX - sink_links_count)
1195 return AVERROR(EINVAL);
1196 sink_links_count += f->nb_inputs;
1199 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1201 return AVERROR(ENOMEM);
1202 for (i = 0; i < graph->nb_filters; i++) {
1203 f = graph->filters[i];
1204 if (!f->nb_outputs) {
1205 for (j = 0; j < f->nb_inputs; j++) {
1206 sinks[n] = f->inputs[j];
1207 f->inputs[j]->age_index = n++;
1211 av_assert0(n == sink_links_count);
1212 graph->sink_links = sinks;
1213 graph->sink_links_count = sink_links_count;
1217 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1223 for (i = 0; i < graph->nb_filters; i++) {
1224 f = graph->filters[i];
1226 for (j = 0; j < f->nb_inputs; j++) {
1227 AVFilterLink *link = f->inputs[j];
1228 AVFilterContext *fifo_ctx;
1232 if (!link->dstpad->needs_fifo)
1235 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1236 avfilter_get_by_name("fifo") :
1237 avfilter_get_by_name("afifo");
1239 snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
1241 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1246 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1255 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1259 if ((ret = graph_check_validity(graphctx, log_ctx)))
1261 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1263 if ((ret = graph_config_formats(graphctx, log_ctx)))
1265 if ((ret = graph_config_links(graphctx, log_ctx)))
1267 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1273 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1275 int i, r = AVERROR(ENOSYS);
1280 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1281 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1282 if (r != AVERROR(ENOSYS))
1289 for (i = 0; i < graph->nb_filters; i++) {
1290 AVFilterContext *filter = graph->filters[i];
1291 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1292 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1293 if (r != AVERROR(ENOSYS)) {
1294 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1303 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1310 for (i = 0; i < graph->nb_filters; i++) {
1311 AVFilterContext *filter = graph->filters[i];
1312 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1313 AVFilterCommand **queue = &filter->command_queue, *next;
1314 while (*queue && (*queue)->time <= ts)
1315 queue = &(*queue)->next;
1317 *queue = av_mallocz(sizeof(AVFilterCommand));
1318 (*queue)->command = av_strdup(command);
1319 (*queue)->arg = av_strdup(arg);
1320 (*queue)->time = ts;
1321 (*queue)->flags = flags;
1322 (*queue)->next = next;
1323 if(flags & AVFILTER_CMD_FLAG_ONE)
1331 static void heap_bubble_up(AVFilterGraph *graph,
1332 AVFilterLink *link, int index)
1334 AVFilterLink **links = graph->sink_links;
1336 av_assert0(index >= 0);
1339 int parent = (index - 1) >> 1;
1340 if (links[parent]->current_pts_us >= link->current_pts_us)
1342 links[index] = links[parent];
1343 links[index]->age_index = index;
1346 links[index] = link;
1347 link->age_index = index;
1350 static void heap_bubble_down(AVFilterGraph *graph,
1351 AVFilterLink *link, int index)
1353 AVFilterLink **links = graph->sink_links;
1355 av_assert0(index >= 0);
1358 int child = 2 * index + 1;
1359 if (child >= graph->sink_links_count)
1361 if (child + 1 < graph->sink_links_count &&
1362 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1364 if (link->current_pts_us < links[child]->current_pts_us)
1366 links[index] = links[child];
1367 links[index]->age_index = index;
1370 links[index] = link;
1371 link->age_index = index;
1374 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1376 heap_bubble_up (graph, link, link->age_index);
1377 heap_bubble_down(graph, link, link->age_index);
1381 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1383 AVFilterLink *oldest = graph->sink_links[0];
1386 while (graph->sink_links_count) {
1387 oldest = graph->sink_links[0];
1388 r = ff_request_frame(oldest);
1389 if (r != AVERROR_EOF)
1391 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1392 oldest->dst ? oldest->dst->name : "unknown",
1393 oldest->dstpad ? oldest->dstpad->name : "unknown");
1394 /* EOF: remove the link from the heap */
1395 if (oldest->age_index < --graph->sink_links_count)
1396 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1398 oldest->age_index = -1;
1400 if (!graph->sink_links_count)
1402 av_assert1(oldest->age_index >= 0);
1403 while (oldest->frame_wanted_out) {
1404 r = ff_filter_graph_run_once(graph);
1411 static AVFilterLink *graph_run_once_find_filter(AVFilterGraph *graph)
1416 /* TODO: replace scanning the graph with a priority list */
1417 for (i = 0; i < graph->nb_filters; i++) {
1418 f = graph->filters[i];
1419 for (j = 0; j < f->nb_outputs; j++)
1420 if (f->outputs[j]->frame_wanted_in)
1421 return f->outputs[j];
1423 for (i = 0; i < graph->nb_filters; i++) {
1424 f = graph->filters[i];
1425 for (j = 0; j < f->nb_outputs; j++)
1426 if (f->outputs[j]->frame_wanted_out)
1427 return f->outputs[j];
1432 int ff_filter_graph_run_once(AVFilterGraph *graph)
1437 link = graph_run_once_find_filter(graph);
1439 av_log(NULL, AV_LOG_WARNING, "Useless run of a filter graph\n");
1440 return AVERROR(EAGAIN);
1442 ret = ff_request_frame_to_filter(link);
1443 if (ret == AVERROR_EOF)
1444 /* local EOF will be forwarded through request_frame() /
1445 set_status() until it reaches the sink */
1447 return ret < 0 ? ret : 1;