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"
34 #include "libavcodec/avcodec.h" // avcodec_find_best_pix_fmt_of_2()
41 #define OFFSET(x) offsetof(AVFilterGraph, x)
42 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
43 static const AVOption filtergraph_options[] = {
44 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
45 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
46 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
47 { "threads", "Maximum number of threads", OFFSET(nb_threads),
48 AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
49 {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
50 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
51 {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
52 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
56 static const AVClass filtergraph_class = {
57 .class_name = "AVFilterGraph",
58 .item_name = av_default_item_name,
59 .version = LIBAVUTIL_VERSION_INT,
60 .option = filtergraph_options,
61 .category = AV_CLASS_CATEGORY_FILTER,
65 void ff_graph_thread_free(AVFilterGraph *graph)
69 int ff_graph_thread_init(AVFilterGraph *graph)
71 graph->thread_type = 0;
72 graph->nb_threads = 1;
77 AVFilterGraph *avfilter_graph_alloc(void)
79 AVFilterGraph *ret = av_mallocz(sizeof(*ret));
83 ret->internal = av_mallocz(sizeof(*ret->internal));
89 ret->av_class = &filtergraph_class;
90 av_opt_set_defaults(ret);
95 void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
98 for (i = 0; i < graph->nb_filters; i++) {
99 if (graph->filters[i] == filter) {
100 FFSWAP(AVFilterContext*, graph->filters[i],
101 graph->filters[graph->nb_filters - 1]);
108 void avfilter_graph_free(AVFilterGraph **graph)
113 while ((*graph)->nb_filters)
114 avfilter_free((*graph)->filters[0]);
116 ff_graph_thread_free(*graph);
118 av_freep(&(*graph)->sink_links);
120 av_freep(&(*graph)->scale_sws_opts);
121 av_freep(&(*graph)->aresample_swr_opts);
122 av_freep(&(*graph)->resample_lavr_opts);
123 av_freep(&(*graph)->filters);
124 av_freep(&(*graph)->internal);
128 #if FF_API_AVFILTER_OPEN
129 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
131 AVFilterContext **filters = av_realloc(graph->filters,
132 sizeof(*filters) * (graph->nb_filters + 1));
134 return AVERROR(ENOMEM);
136 graph->filters = filters;
137 graph->filters[graph->nb_filters++] = filter;
140 FF_DISABLE_DEPRECATION_WARNINGS
141 graph->filter_count_unused = graph->nb_filters;
142 FF_ENABLE_DEPRECATION_WARNINGS
145 filter->graph = graph;
151 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
152 const char *name, const char *args, void *opaque,
153 AVFilterGraph *graph_ctx)
157 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
159 return AVERROR(ENOMEM);
161 ret = avfilter_init_str(*filt_ctx, args);
169 avfilter_free(*filt_ctx);
174 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
176 graph->disable_auto_convert = flags;
179 AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
180 const AVFilter *filter,
183 AVFilterContext **filters, *s;
185 if (graph->thread_type && !graph->internal->thread_execute) {
186 if (graph->execute) {
187 graph->internal->thread_execute = graph->execute;
189 int ret = ff_graph_thread_init(graph);
191 av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
197 s = ff_filter_alloc(filter, name);
201 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
207 graph->filters = filters;
208 graph->filters[graph->nb_filters++] = s;
211 FF_DISABLE_DEPRECATION_WARNINGS
212 graph->filter_count_unused = graph->nb_filters;
213 FF_ENABLE_DEPRECATION_WARNINGS
222 * Check for the validity of graph.
224 * A graph is considered valid if all its input and output pads are
227 * @return >= 0 in case of success, a negative value otherwise
229 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
231 AVFilterContext *filt;
234 for (i = 0; i < graph->nb_filters; i++) {
235 const AVFilterPad *pad;
236 filt = graph->filters[i];
238 for (j = 0; j < filt->nb_inputs; j++) {
239 if (!filt->inputs[j] || !filt->inputs[j]->src) {
240 pad = &filt->input_pads[j];
241 av_log(log_ctx, AV_LOG_ERROR,
242 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
243 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
244 return AVERROR(EINVAL);
248 for (j = 0; j < filt->nb_outputs; j++) {
249 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
250 pad = &filt->output_pads[j];
251 av_log(log_ctx, AV_LOG_ERROR,
252 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
253 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
254 return AVERROR(EINVAL);
263 * Configure all the links of graphctx.
265 * @return >= 0 in case of success, a negative value otherwise
267 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
269 AVFilterContext *filt;
272 for (i = 0; i < graph->nb_filters; i++) {
273 filt = graph->filters[i];
275 if (!filt->nb_outputs) {
276 if ((ret = avfilter_config_links(filt)))
284 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name)
288 for (i = 0; i < graph->nb_filters; i++)
289 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
290 return graph->filters[i];
295 static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
299 if (l->nb_channel_layouts) {
300 if (l->all_layouts || l->all_counts)
301 av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
302 l->all_layouts = l->all_counts = 0;
304 if (l->all_counts && !l->all_layouts)
305 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
310 static int filter_query_formats(AVFilterContext *ctx)
313 AVFilterFormats *formats;
314 AVFilterChannelLayouts *chlayouts;
315 AVFilterFormats *samplerates;
316 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
317 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
320 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
321 if (ret != AVERROR(EAGAIN))
322 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
323 ctx->name, av_err2str(ret));
327 for (i = 0; i < ctx->nb_inputs; i++)
328 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
329 for (i = 0; i < ctx->nb_outputs; i++)
330 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
332 formats = ff_all_formats(type);
334 return AVERROR(ENOMEM);
335 ff_set_common_formats(ctx, formats);
336 if (type == AVMEDIA_TYPE_AUDIO) {
337 samplerates = ff_all_samplerates();
339 return AVERROR(ENOMEM);
340 ff_set_common_samplerates(ctx, samplerates);
341 chlayouts = ff_all_channel_layouts();
343 return AVERROR(ENOMEM);
344 ff_set_common_channel_layouts(ctx, chlayouts);
349 static int formats_declared(AVFilterContext *f)
353 for (i = 0; i < f->nb_inputs; i++) {
354 if (!f->inputs[i]->out_formats)
356 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
357 !(f->inputs[i]->out_samplerates &&
358 f->inputs[i]->out_channel_layouts))
361 for (i = 0; i < f->nb_outputs; i++) {
362 if (!f->outputs[i]->in_formats)
364 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
365 !(f->outputs[i]->in_samplerates &&
366 f->outputs[i]->in_channel_layouts))
372 static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
374 AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
378 a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
379 if (!a->formats && arg->formats)
385 static int can_merge_formats(AVFilterFormats *a_arg,
386 AVFilterFormats *b_arg,
387 enum AVMediaType type,
390 AVFilterFormats *a, *b, *ret;
393 a = clone_filter_formats(a_arg);
394 b = clone_filter_formats(b_arg);
398 av_freep(&a->formats);
400 av_freep(&b->formats);
408 if (is_sample_rate) {
409 ret = ff_merge_samplerates(a, b);
411 ret = ff_merge_formats(a, b, type);
414 av_freep(&ret->formats);
415 av_freep(&ret->refs);
419 av_freep(&a->formats);
420 av_freep(&b->formats);
428 * Perform one round of query_formats() and merging formats lists on the
430 * @return >=0 if all links formats lists could be queried and merged;
431 * AVERROR(EAGAIN) some progress was made in the queries or merging
432 * and a later call may succeed;
433 * AVERROR(EIO) (may be changed) plus a log message if no progress
434 * was made and the negotiation is stuck;
435 * a negative error code if some other error happened
437 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
440 int scaler_count = 0, resampler_count = 0;
441 int count_queried = 0; /* successful calls to query_formats() */
442 int count_merged = 0; /* successful merge of formats lists */
443 int count_already_merged = 0; /* lists already merged */
444 int count_delayed = 0; /* lists that need to be merged later */
446 for (i = 0; i < graph->nb_filters; i++) {
447 AVFilterContext *f = graph->filters[i];
448 if (formats_declared(f))
450 if (f->filter->query_formats)
451 ret = filter_query_formats(f);
453 ret = ff_default_query_formats(f);
454 if (ret < 0 && ret != AVERROR(EAGAIN))
456 /* note: EAGAIN could indicate a partial success, not counted yet */
457 count_queried += ret >= 0;
460 /* go through and merge as many format lists as possible */
461 for (i = 0; i < graph->nb_filters; i++) {
462 AVFilterContext *filter = graph->filters[i];
464 for (j = 0; j < filter->nb_inputs; j++) {
465 AVFilterLink *link = filter->inputs[j];
466 int convert_needed = 0;
471 if (link->in_formats != link->out_formats
472 && link->in_formats && link->out_formats)
473 if (!can_merge_formats(link->in_formats, link->out_formats,
476 if (link->type == AVMEDIA_TYPE_AUDIO) {
477 if (link->in_samplerates != link->out_samplerates
478 && link->in_samplerates && link->out_samplerates)
479 if (!can_merge_formats(link->in_samplerates,
480 link->out_samplerates,
485 #define MERGE_DISPATCH(field, statement) \
486 if (!(link->in_ ## field && link->out_ ## field)) { \
488 } else if (link->in_ ## field == link->out_ ## field) { \
489 count_already_merged++; \
490 } else if (!convert_needed) { \
495 if (link->type == AVMEDIA_TYPE_AUDIO) {
496 MERGE_DISPATCH(channel_layouts,
497 if (!ff_merge_channel_layouts(link->in_channel_layouts,
498 link->out_channel_layouts))
501 MERGE_DISPATCH(samplerates,
502 if (!ff_merge_samplerates(link->in_samplerates,
503 link->out_samplerates))
507 MERGE_DISPATCH(formats,
508 if (!ff_merge_formats(link->in_formats, link->out_formats,
512 #undef MERGE_DISPATCH
514 if (convert_needed) {
515 AVFilterContext *convert;
517 AVFilterLink *inlink, *outlink;
518 char scale_args[256];
521 /* couldn't merge format lists. auto-insert conversion filter */
522 switch (link->type) {
523 case AVMEDIA_TYPE_VIDEO:
524 if (!(filter = avfilter_get_by_name("scale"))) {
525 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
526 "not present, cannot convert pixel formats.\n");
527 return AVERROR(EINVAL);
530 snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
533 if ((ret = avfilter_graph_create_filter(&convert, filter,
534 inst_name, graph->scale_sws_opts, NULL,
538 case AVMEDIA_TYPE_AUDIO:
539 if (!(filter = avfilter_get_by_name("aresample"))) {
540 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
541 "not present, cannot convert audio formats.\n");
542 return AVERROR(EINVAL);
545 snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
547 scale_args[0] = '\0';
548 if (graph->aresample_swr_opts)
549 snprintf(scale_args, sizeof(scale_args), "%s",
550 graph->aresample_swr_opts);
551 if ((ret = avfilter_graph_create_filter(&convert, filter,
552 inst_name, graph->aresample_swr_opts,
557 return AVERROR(EINVAL);
560 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
563 filter_query_formats(convert);
564 inlink = convert->inputs[0];
565 outlink = convert->outputs[0];
566 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
567 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
568 ret |= AVERROR(ENOSYS);
569 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
570 (!ff_merge_samplerates(inlink->in_samplerates,
571 inlink->out_samplerates) ||
572 !ff_merge_channel_layouts(inlink->in_channel_layouts,
573 inlink->out_channel_layouts)))
574 ret |= AVERROR(ENOSYS);
575 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
576 (!ff_merge_samplerates(outlink->in_samplerates,
577 outlink->out_samplerates) ||
578 !ff_merge_channel_layouts(outlink->in_channel_layouts,
579 outlink->out_channel_layouts)))
580 ret |= AVERROR(ENOSYS);
583 av_log(log_ctx, AV_LOG_ERROR,
584 "Impossible to convert between the formats supported by the filter "
585 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
592 av_log(graph, AV_LOG_DEBUG, "query_formats: "
593 "%d queried, %d merged, %d already done, %d delayed\n",
594 count_queried, count_merged, count_already_merged, count_delayed);
598 /* if count_queried > 0, one filter at least did set its formats,
599 that will give additional information to its neighbour;
600 if count_merged > 0, one pair of formats lists at least was merged,
601 that will give additional information to all connected filters;
602 in both cases, progress was made and a new round must be done */
603 if (count_queried || count_merged)
604 return AVERROR(EAGAIN);
605 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
606 for (i = 0; i < graph->nb_filters; i++)
607 if (!formats_declared(graph->filters[i]))
608 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
609 graph->filters[i]->name);
610 av_log(graph, AV_LOG_ERROR,
611 "The following filters could not choose their formats: %s\n"
612 "Consider inserting the (a)format filter near their input or "
613 "output.\n", bp.str);
619 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
621 if (!link || !link->in_formats)
624 if (link->type == AVMEDIA_TYPE_VIDEO) {
625 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
626 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
627 enum AVPixelFormat best= AV_PIX_FMT_NONE;
629 for (i=0; i<link->in_formats->nb_formats; i++) {
630 enum AVPixelFormat p = link->in_formats->formats[i];
631 best= avcodec_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
633 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
634 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
635 av_get_pix_fmt_name(ref->format), has_alpha);
636 link->in_formats->formats[0] = best;
640 link->in_formats->nb_formats = 1;
641 link->format = link->in_formats->formats[0];
643 if (link->type == AVMEDIA_TYPE_AUDIO) {
644 if (!link->in_samplerates->nb_formats) {
645 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
646 " the link between filters %s and %s.\n", link->src->name,
648 return AVERROR(EINVAL);
650 link->in_samplerates->nb_formats = 1;
651 link->sample_rate = link->in_samplerates->formats[0];
653 if (link->in_channel_layouts->all_layouts) {
654 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
655 " the link between filters %s and %s.\n", link->src->name,
657 return AVERROR(EINVAL);
659 link->in_channel_layouts->nb_channel_layouts = 1;
660 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
661 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
662 link->channel_layout = 0;
664 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
667 ff_formats_unref(&link->in_formats);
668 ff_formats_unref(&link->out_formats);
669 ff_formats_unref(&link->in_samplerates);
670 ff_formats_unref(&link->out_samplerates);
671 ff_channel_layouts_unref(&link->in_channel_layouts);
672 ff_channel_layouts_unref(&link->out_channel_layouts);
677 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
679 for (i = 0; i < filter->nb_inputs; i++) { \
680 AVFilterLink *link = filter->inputs[i]; \
683 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
685 fmt = link->out_ ## list->var[0]; \
687 for (j = 0; j < filter->nb_outputs; j++) { \
688 AVFilterLink *out_link = filter->outputs[j]; \
691 if (link->type != out_link->type || \
692 out_link->in_ ## list->nb == 1) \
694 fmts = out_link->in_ ## list; \
696 if (!out_link->in_ ## list->nb) { \
697 add_format(&out_link->in_ ##list, fmt); \
702 for (k = 0; k < out_link->in_ ## list->nb; k++) \
703 if (fmts->var[k] == fmt) { \
704 fmts->var[0] = fmt; \
713 static int reduce_formats_on_filter(AVFilterContext *filter)
715 int i, j, k, ret = 0;
717 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
718 nb_formats, ff_add_format);
719 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
720 nb_formats, ff_add_format);
722 /* reduce channel layouts */
723 for (i = 0; i < filter->nb_inputs; i++) {
724 AVFilterLink *inlink = filter->inputs[i];
727 if (!inlink->out_channel_layouts ||
728 inlink->out_channel_layouts->nb_channel_layouts != 1)
730 fmt = inlink->out_channel_layouts->channel_layouts[0];
732 for (j = 0; j < filter->nb_outputs; j++) {
733 AVFilterLink *outlink = filter->outputs[j];
734 AVFilterChannelLayouts *fmts;
736 fmts = outlink->in_channel_layouts;
737 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
740 if (fmts->all_layouts) {
741 /* Turn the infinite list into a singleton */
742 fmts->all_layouts = fmts->all_counts = 0;
743 ff_add_channel_layout(&outlink->in_channel_layouts, fmt);
747 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
748 if (fmts->channel_layouts[k] == fmt) {
749 fmts->channel_layouts[0] = fmt;
750 fmts->nb_channel_layouts = 1;
761 static void reduce_formats(AVFilterGraph *graph)
768 for (i = 0; i < graph->nb_filters; i++)
769 reduced |= reduce_formats_on_filter(graph->filters[i]);
773 static void swap_samplerates_on_filter(AVFilterContext *filter)
775 AVFilterLink *link = NULL;
779 for (i = 0; i < filter->nb_inputs; i++) {
780 link = filter->inputs[i];
782 if (link->type == AVMEDIA_TYPE_AUDIO &&
783 link->out_samplerates->nb_formats== 1)
786 if (i == filter->nb_inputs)
789 sample_rate = link->out_samplerates->formats[0];
791 for (i = 0; i < filter->nb_outputs; i++) {
792 AVFilterLink *outlink = filter->outputs[i];
793 int best_idx, best_diff = INT_MAX;
795 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
796 outlink->in_samplerates->nb_formats < 2)
799 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
800 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
802 if (diff < best_diff) {
807 FFSWAP(int, outlink->in_samplerates->formats[0],
808 outlink->in_samplerates->formats[best_idx]);
812 static void swap_samplerates(AVFilterGraph *graph)
816 for (i = 0; i < graph->nb_filters; i++)
817 swap_samplerates_on_filter(graph->filters[i]);
820 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
821 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
822 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
823 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
824 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
825 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
826 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
828 /* allowable substitutions for channel pairs when comparing layouts,
829 * ordered by priority for both values */
830 static const uint64_t ch_subst[][2] = {
831 { CH_FRONT_PAIR, CH_CENTER_PAIR },
832 { CH_FRONT_PAIR, CH_WIDE_PAIR },
833 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
834 { CH_CENTER_PAIR, CH_FRONT_PAIR },
835 { CH_CENTER_PAIR, CH_WIDE_PAIR },
836 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
837 { CH_WIDE_PAIR, CH_FRONT_PAIR },
838 { CH_WIDE_PAIR, CH_CENTER_PAIR },
839 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
840 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
841 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
842 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
843 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
844 { CH_SIDE_PAIR, CH_BACK_PAIR },
845 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
846 { CH_BACK_PAIR, CH_DIRECT_PAIR },
847 { CH_BACK_PAIR, CH_SIDE_PAIR },
848 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
849 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
850 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
851 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
854 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
856 AVFilterLink *link = NULL;
859 for (i = 0; i < filter->nb_inputs; i++) {
860 link = filter->inputs[i];
862 if (link->type == AVMEDIA_TYPE_AUDIO &&
863 link->out_channel_layouts->nb_channel_layouts == 1)
866 if (i == filter->nb_inputs)
869 for (i = 0; i < filter->nb_outputs; i++) {
870 AVFilterLink *outlink = filter->outputs[i];
871 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
873 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
874 outlink->in_channel_layouts->nb_channel_layouts < 2)
877 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
878 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
879 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
880 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
881 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
882 int count_diff = out_channels - in_channels;
883 int matched_channels, extra_channels;
886 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
887 /* Compute score in case the input or output layout encodes
888 a channel count; in this case the score is not altered by
889 the computation afterwards, as in_chlayout and
890 out_chlayout have both been set to 0 */
891 if (FF_LAYOUT2COUNT(in_chlayout))
892 in_channels = FF_LAYOUT2COUNT(in_chlayout);
893 if (FF_LAYOUT2COUNT(out_chlayout))
894 out_channels = FF_LAYOUT2COUNT(out_chlayout);
895 score -= 10000 + FFABS(out_channels - in_channels) +
896 (in_channels > out_channels ? 10000 : 0);
897 in_chlayout = out_chlayout = 0;
898 /* Let the remaining computation run, even if the score
899 value is not altered */
902 /* channel substitution */
903 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
904 uint64_t cmp0 = ch_subst[k][0];
905 uint64_t cmp1 = ch_subst[k][1];
906 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
907 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
908 in_chlayout &= ~cmp0;
909 out_chlayout &= ~cmp1;
910 /* add score for channel match, minus a deduction for
911 having to do the substitution */
912 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
916 /* no penalty for LFE channel mismatch */
917 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
918 (out_chlayout & AV_CH_LOW_FREQUENCY))
920 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
921 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
923 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
925 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
927 score += 10 * matched_channels - 5 * extra_channels;
929 if (score > best_score ||
930 (count_diff < best_count_diff && score == best_score)) {
933 best_count_diff = count_diff;
936 av_assert0(best_idx >= 0);
937 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
938 outlink->in_channel_layouts->channel_layouts[best_idx]);
943 static void swap_channel_layouts(AVFilterGraph *graph)
947 for (i = 0; i < graph->nb_filters; i++)
948 swap_channel_layouts_on_filter(graph->filters[i]);
951 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
953 AVFilterLink *link = NULL;
957 for (i = 0; i < filter->nb_inputs; i++) {
958 link = filter->inputs[i];
960 if (link->type == AVMEDIA_TYPE_AUDIO &&
961 link->out_formats->nb_formats == 1)
964 if (i == filter->nb_inputs)
967 format = link->out_formats->formats[0];
968 bps = av_get_bytes_per_sample(format);
970 for (i = 0; i < filter->nb_outputs; i++) {
971 AVFilterLink *outlink = filter->outputs[i];
972 int best_idx = -1, best_score = INT_MIN;
974 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
975 outlink->in_formats->nb_formats < 2)
978 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
979 int out_format = outlink->in_formats->formats[j];
980 int out_bps = av_get_bytes_per_sample(out_format);
983 if (av_get_packed_sample_fmt(out_format) == format ||
984 av_get_planar_sample_fmt(out_format) == format) {
989 /* for s32 and float prefer double to prevent loss of information */
990 if (bps == 4 && out_bps == 8) {
995 /* prefer closest higher or equal bps */
996 score = -abs(out_bps - bps);
1000 if (score > best_score) {
1005 av_assert0(best_idx >= 0);
1006 FFSWAP(int, outlink->in_formats->formats[0],
1007 outlink->in_formats->formats[best_idx]);
1011 static void swap_sample_fmts(AVFilterGraph *graph)
1015 for (i = 0; i < graph->nb_filters; i++)
1016 swap_sample_fmts_on_filter(graph->filters[i]);
1020 static int pick_formats(AVFilterGraph *graph)
1027 for (i = 0; i < graph->nb_filters; i++) {
1028 AVFilterContext *filter = graph->filters[i];
1029 if (filter->nb_inputs){
1030 for (j = 0; j < filter->nb_inputs; j++){
1031 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1032 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1038 if (filter->nb_outputs){
1039 for (j = 0; j < filter->nb_outputs; j++){
1040 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1041 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1047 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1048 for (j = 0; j < filter->nb_outputs; j++) {
1049 if(filter->outputs[j]->format<0) {
1050 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1059 for (i = 0; i < graph->nb_filters; i++) {
1060 AVFilterContext *filter = graph->filters[i];
1062 for (j = 0; j < filter->nb_inputs; j++)
1063 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1065 for (j = 0; j < filter->nb_outputs; j++)
1066 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1073 * Configure the formats of all the links in the graph.
1075 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1079 /* find supported formats from sub-filters, and merge along links */
1080 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1081 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1085 /* Once everything is merged, it's possible that we'll still have
1086 * multiple valid media format choices. We try to minimize the amount
1087 * of format conversion inside filters */
1088 reduce_formats(graph);
1090 /* for audio filters, ensure the best format, sample rate and channel layout
1092 swap_sample_fmts(graph);
1093 swap_samplerates(graph);
1094 swap_channel_layouts(graph);
1096 if ((ret = pick_formats(graph)) < 0)
1102 static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph,
1106 int sink_links_count = 0, n = 0;
1108 AVFilterLink **sinks;
1110 for (i = 0; i < graph->nb_filters; i++) {
1111 f = graph->filters[i];
1112 for (j = 0; j < f->nb_inputs; j++) {
1113 f->inputs[j]->graph = graph;
1114 f->inputs[j]->age_index = -1;
1116 for (j = 0; j < f->nb_outputs; j++) {
1117 f->outputs[j]->graph = graph;
1118 f->outputs[j]->age_index= -1;
1120 if (!f->nb_outputs) {
1121 if (f->nb_inputs > INT_MAX - sink_links_count)
1122 return AVERROR(EINVAL);
1123 sink_links_count += f->nb_inputs;
1126 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1128 return AVERROR(ENOMEM);
1129 for (i = 0; i < graph->nb_filters; i++) {
1130 f = graph->filters[i];
1131 if (!f->nb_outputs) {
1132 for (j = 0; j < f->nb_inputs; j++) {
1133 sinks[n] = f->inputs[j];
1134 f->inputs[j]->age_index = n++;
1138 av_assert0(n == sink_links_count);
1139 graph->sink_links = sinks;
1140 graph->sink_links_count = sink_links_count;
1144 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1150 for (i = 0; i < graph->nb_filters; i++) {
1151 f = graph->filters[i];
1153 for (j = 0; j < f->nb_inputs; j++) {
1154 AVFilterLink *link = f->inputs[j];
1155 AVFilterContext *fifo_ctx;
1159 if (!link->dstpad->needs_fifo)
1162 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1163 avfilter_get_by_name("fifo") :
1164 avfilter_get_by_name("afifo");
1166 snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
1168 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1173 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1182 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1186 if ((ret = graph_check_validity(graphctx, log_ctx)))
1188 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1190 if ((ret = graph_config_formats(graphctx, log_ctx)))
1192 if ((ret = graph_config_links(graphctx, log_ctx)))
1194 if ((ret = ff_avfilter_graph_config_pointers(graphctx, log_ctx)))
1200 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1202 int i, r = AVERROR(ENOSYS);
1207 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1208 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1209 if (r != AVERROR(ENOSYS))
1216 for (i = 0; i < graph->nb_filters; i++) {
1217 AVFilterContext *filter = graph->filters[i];
1218 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1219 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1220 if (r != AVERROR(ENOSYS)) {
1221 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1230 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1237 for (i = 0; i < graph->nb_filters; i++) {
1238 AVFilterContext *filter = graph->filters[i];
1239 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1240 AVFilterCommand **queue = &filter->command_queue, *next;
1241 while (*queue && (*queue)->time <= ts)
1242 queue = &(*queue)->next;
1244 *queue = av_mallocz(sizeof(AVFilterCommand));
1245 (*queue)->command = av_strdup(command);
1246 (*queue)->arg = av_strdup(arg);
1247 (*queue)->time = ts;
1248 (*queue)->flags = flags;
1249 (*queue)->next = next;
1250 if(flags & AVFILTER_CMD_FLAG_ONE)
1258 static void heap_bubble_up(AVFilterGraph *graph,
1259 AVFilterLink *link, int index)
1261 AVFilterLink **links = graph->sink_links;
1264 int parent = (index - 1) >> 1;
1265 if (links[parent]->current_pts >= link->current_pts)
1267 links[index] = links[parent];
1268 links[index]->age_index = index;
1271 links[index] = link;
1272 link->age_index = index;
1275 static void heap_bubble_down(AVFilterGraph *graph,
1276 AVFilterLink *link, int index)
1278 AVFilterLink **links = graph->sink_links;
1281 int child = 2 * index + 1;
1282 if (child >= graph->sink_links_count)
1284 if (child + 1 < graph->sink_links_count &&
1285 links[child + 1]->current_pts < links[child]->current_pts)
1287 if (link->current_pts < links[child]->current_pts)
1289 links[index] = links[child];
1290 links[index]->age_index = index;
1293 links[index] = link;
1294 link->age_index = index;
1297 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1299 heap_bubble_up (graph, link, link->age_index);
1300 heap_bubble_down(graph, link, link->age_index);
1304 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1306 while (graph->sink_links_count) {
1307 AVFilterLink *oldest = graph->sink_links[0];
1308 int r = ff_request_frame(oldest);
1309 if (r != AVERROR_EOF)
1311 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1312 oldest->dst ? oldest->dst->name : "unknown",
1313 oldest->dstpad ? oldest->dstpad->name : "unknown");
1314 /* EOF: remove the link from the heap */
1315 if (oldest->age_index < --graph->sink_links_count)
1316 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1318 oldest->age_index = -1;