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
26 #include "libavutil/avassert.h"
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavcodec/avcodec.h" // avcodec_find_best_pix_fmt_of_2()
32 #include "avfiltergraph.h"
36 #define OFFSET(x) offsetof(AVFilterGraph,x)
38 static const AVOption options[]={
39 {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 },
40 {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 },
45 static const AVClass filtergraph_class = {
46 .class_name = "AVFilterGraph",
47 .item_name = av_default_item_name,
49 .version = LIBAVUTIL_VERSION_INT,
50 .category = AV_CLASS_CATEGORY_FILTER,
53 AVFilterGraph *avfilter_graph_alloc(void)
55 AVFilterGraph *ret = av_mallocz(sizeof(AVFilterGraph));
58 ret->av_class = &filtergraph_class;
62 void avfilter_graph_free(AVFilterGraph **graph)
66 for (; (*graph)->filter_count > 0; (*graph)->filter_count--)
67 avfilter_free((*graph)->filters[(*graph)->filter_count - 1]);
68 av_freep(&(*graph)->sink_links);
69 av_freep(&(*graph)->scale_sws_opts);
70 av_freep(&(*graph)->aresample_swr_opts);
71 av_freep(&(*graph)->filters);
75 int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
77 AVFilterContext **filters = av_realloc(graph->filters,
78 sizeof(AVFilterContext*) * (graph->filter_count+1));
80 return AVERROR(ENOMEM);
82 graph->filters = filters;
83 graph->filters[graph->filter_count++] = filter;
88 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
89 const char *name, const char *args, void *opaque,
90 AVFilterGraph *graph_ctx)
94 if ((ret = avfilter_open(filt_ctx, filt, name)) < 0)
96 if ((ret = avfilter_init_filter(*filt_ctx, args, opaque)) < 0)
98 if ((ret = avfilter_graph_add_filter(graph_ctx, *filt_ctx)) < 0)
104 avfilter_free(*filt_ctx);
109 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
111 graph->disable_auto_convert = flags;
115 * Check for the validity of graph.
117 * A graph is considered valid if all its input and output pads are
120 * @return 0 in case of success, a negative value otherwise
122 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
124 AVFilterContext *filt;
127 for (i = 0; i < graph->filter_count; i++) {
128 const AVFilterPad *pad;
129 filt = graph->filters[i];
131 for (j = 0; j < filt->nb_inputs; j++) {
132 if (!filt->inputs[j] || !filt->inputs[j]->src) {
133 pad = &filt->input_pads[j];
134 av_log(log_ctx, AV_LOG_ERROR,
135 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
136 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
137 return AVERROR(EINVAL);
141 for (j = 0; j < filt->nb_outputs; j++) {
142 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
143 pad = &filt->output_pads[j];
144 av_log(log_ctx, AV_LOG_ERROR,
145 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
146 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
147 return AVERROR(EINVAL);
156 * Configure all the links of graphctx.
158 * @return 0 in case of success, a negative value otherwise
160 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
162 AVFilterContext *filt;
165 for (i=0; i < graph->filter_count; i++) {
166 filt = graph->filters[i];
168 if (!filt->nb_outputs) {
169 if ((ret = avfilter_config_links(filt)))
177 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name)
181 for (i = 0; i < graph->filter_count; i++)
182 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
183 return graph->filters[i];
188 static int filter_query_formats(AVFilterContext *ctx)
191 AVFilterFormats *formats;
192 AVFilterChannelLayouts *chlayouts;
193 AVFilterFormats *samplerates;
194 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
195 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
198 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
199 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
200 ctx->name, av_err2str(ret));
204 formats = ff_all_formats(type);
206 return AVERROR(ENOMEM);
207 ff_set_common_formats(ctx, formats);
208 if (type == AVMEDIA_TYPE_AUDIO) {
209 samplerates = ff_all_samplerates();
211 return AVERROR(ENOMEM);
212 ff_set_common_samplerates(ctx, samplerates);
213 chlayouts = ff_all_channel_layouts();
215 return AVERROR(ENOMEM);
216 ff_set_common_channel_layouts(ctx, chlayouts);
221 static int insert_conv_filter(AVFilterGraph *graph, AVFilterLink *link,
222 const char *filt_name, const char *filt_args)
224 static int auto_count = 0, ret;
226 AVFilterContext *filt_ctx;
228 if (graph->disable_auto_convert) {
229 av_log(NULL, AV_LOG_ERROR,
230 "The filters '%s' and '%s' do not have a common format "
231 "and automatic conversion is disabled.\n",
232 link->src->name, link->dst->name);
233 return AVERROR(EINVAL);
236 snprintf(inst_name, sizeof(inst_name), "auto-inserted %s %d",
237 filt_name, auto_count++);
239 if ((ret = avfilter_graph_create_filter(&filt_ctx,
240 avfilter_get_by_name(filt_name),
241 inst_name, filt_args, NULL, graph)) < 0)
243 if ((ret = avfilter_insert_filter(link, filt_ctx, 0, 0)) < 0)
246 filter_query_formats(filt_ctx);
248 if ( ((link = filt_ctx-> inputs[0]) &&
249 !ff_merge_formats(link->in_formats, link->out_formats)) ||
250 ((link = filt_ctx->outputs[0]) &&
251 !ff_merge_formats(link->in_formats, link->out_formats))
253 av_log(NULL, AV_LOG_ERROR,
254 "Impossible to convert between the formats supported by the filter "
255 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
256 return AVERROR(EINVAL);
259 if (link->type == AVMEDIA_TYPE_AUDIO &&
260 (((link = filt_ctx-> inputs[0]) &&
261 !ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)) ||
262 ((link = filt_ctx->outputs[0]) &&
263 !ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)))
265 av_log(NULL, AV_LOG_ERROR,
266 "Impossible to convert between the channel layouts formats supported by the filter "
267 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
268 return AVERROR(EINVAL);
274 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
279 AVFilterFormats *formats;
280 AVFilterChannelLayouts *chlayouts;
281 AVFilterFormats *samplerates;
283 int scaler_count = 0, resampler_count = 0;
285 for (j = 0; j < 2; j++) {
286 /* ask all the sub-filters for their supported media formats */
287 for (i = 0; i < graph->filter_count; i++) {
288 /* Call query_formats on sources first.
289 This is a temporary workaround for amerge,
290 until format renegociation is implemented. */
291 if (!graph->filters[i]->nb_inputs == j)
293 if (graph->filters[i]->filter->query_formats)
294 ret = filter_query_formats(graph->filters[i]);
296 ret = ff_default_query_formats(graph->filters[i]);
302 /* go through and merge as many format lists as possible */
303 for (i = 0; i < graph->filter_count; i++) {
304 AVFilterContext *filter = graph->filters[i];
306 for (j = 0; j < filter->nb_inputs; j++) {
307 AVFilterLink *link = filter->inputs[j];
311 if (!link->in_formats || !link->out_formats)
312 return AVERROR(EINVAL);
314 if (link->type == AVMEDIA_TYPE_VIDEO &&
315 !ff_merge_formats(link->in_formats, link->out_formats)) {
317 /* couldn't merge format lists, auto-insert scale filter */
318 snprintf(filt_args, sizeof(filt_args), "0:0:%s",
319 graph->scale_sws_opts);
320 if (ret = insert_conv_filter(graph, link, "scale", filt_args))
323 else if (link->type == AVMEDIA_TYPE_AUDIO) {
324 if (!link->in_channel_layouts || !link->out_channel_layouts)
325 return AVERROR(EINVAL);
327 /* Merge all three list before checking: that way, in all
328 * three categories, aconvert will use a common format
329 * whenever possible. */
330 formats = ff_merge_formats(link->in_formats, link->out_formats);
331 chlayouts = ff_merge_channel_layouts(link->in_channel_layouts , link->out_channel_layouts);
332 samplerates = ff_merge_samplerates (link->in_samplerates, link->out_samplerates);
334 if (!formats || !chlayouts || !samplerates)
335 if (ret = insert_conv_filter(graph, link, "aresample", NULL))
338 int convert_needed = 0;
343 if (link->in_formats != link->out_formats &&
344 !ff_merge_formats(link->in_formats,
347 if (link->type == AVMEDIA_TYPE_AUDIO) {
348 if (link->in_channel_layouts != link->out_channel_layouts &&
349 !ff_merge_channel_layouts(link->in_channel_layouts,
350 link->out_channel_layouts))
352 if (link->in_samplerates != link->out_samplerates &&
353 !ff_merge_samplerates(link->in_samplerates,
354 link->out_samplerates))
358 if (convert_needed) {
359 AVFilterContext *convert;
361 AVFilterLink *inlink, *outlink;
362 char scale_args[256];
365 /* couldn't merge format lists. auto-insert conversion filter */
366 switch (link->type) {
367 case AVMEDIA_TYPE_VIDEO:
368 if (!(filter = avfilter_get_by_name("scale"))) {
369 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
370 "not present, cannot convert pixel formats.\n");
371 return AVERROR(EINVAL);
374 snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
376 if (graph->scale_sws_opts)
377 snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
379 snprintf(scale_args, sizeof(scale_args), "0:0");
381 if ((ret = avfilter_graph_create_filter(&convert, filter,
382 inst_name, scale_args, NULL,
386 case AVMEDIA_TYPE_AUDIO:
387 if (!(filter = avfilter_get_by_name("aresample"))) {
388 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
389 "not present, cannot convert audio formats.\n");
390 return AVERROR(EINVAL);
393 snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
395 if ((ret = avfilter_graph_create_filter(&convert, filter,
396 inst_name, graph->aresample_swr_opts, NULL, graph)) < 0)
400 return AVERROR(EINVAL);
403 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
406 filter_query_formats(convert);
407 inlink = convert->inputs[0];
408 outlink = convert->outputs[0];
409 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats) ||
410 !ff_merge_formats(outlink->in_formats, outlink->out_formats))
411 ret |= AVERROR(ENOSYS);
412 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
413 (!ff_merge_samplerates(inlink->in_samplerates,
414 inlink->out_samplerates) ||
415 !ff_merge_channel_layouts(inlink->in_channel_layouts,
416 inlink->out_channel_layouts)))
417 ret |= AVERROR(ENOSYS);
418 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
419 (!ff_merge_samplerates(outlink->in_samplerates,
420 outlink->out_samplerates) ||
421 !ff_merge_channel_layouts(outlink->in_channel_layouts,
422 outlink->out_channel_layouts)))
423 ret |= AVERROR(ENOSYS);
426 av_log(log_ctx, AV_LOG_ERROR,
427 "Impossible to convert between the formats supported by the filter "
428 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
439 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
441 if (!link || !link->in_formats)
444 if (link->type == AVMEDIA_TYPE_VIDEO) {
445 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
446 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
447 enum AVPixelFormat best= AV_PIX_FMT_NONE;
449 for (i=0; i<link->in_formats->format_count; i++) {
450 enum AVPixelFormat p = link->in_formats->formats[i];
451 best= avcodec_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
453 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
454 av_get_pix_fmt_name(best), link->in_formats->format_count,
455 av_get_pix_fmt_name(ref->format), has_alpha);
456 link->in_formats->formats[0] = best;
460 link->in_formats->format_count = 1;
461 link->format = link->in_formats->formats[0];
463 if (link->type == AVMEDIA_TYPE_AUDIO) {
464 if (!link->in_samplerates->format_count) {
465 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
466 " the link between filters %s and %s.\n", link->src->name,
468 return AVERROR(EINVAL);
470 link->in_samplerates->format_count = 1;
471 link->sample_rate = link->in_samplerates->formats[0];
473 if (!link->in_channel_layouts->nb_channel_layouts) {
474 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
475 "the link between filters %s and %s.\n", link->src->name,
477 return AVERROR(EINVAL);
479 link->in_channel_layouts->nb_channel_layouts = 1;
480 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
481 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
484 ff_formats_unref(&link->in_formats);
485 ff_formats_unref(&link->out_formats);
486 ff_formats_unref(&link->in_samplerates);
487 ff_formats_unref(&link->out_samplerates);
488 ff_channel_layouts_unref(&link->in_channel_layouts);
489 ff_channel_layouts_unref(&link->out_channel_layouts);
494 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
496 for (i = 0; i < filter->nb_inputs; i++) { \
497 AVFilterLink *link = filter->inputs[i]; \
500 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
502 fmt = link->out_ ## list->var[0]; \
504 for (j = 0; j < filter->nb_outputs; j++) { \
505 AVFilterLink *out_link = filter->outputs[j]; \
508 if (link->type != out_link->type || \
509 out_link->in_ ## list->nb == 1) \
511 fmts = out_link->in_ ## list; \
513 if (!out_link->in_ ## list->nb) { \
514 add_format(&out_link->in_ ##list, fmt); \
518 for (k = 0; k < out_link->in_ ## list->nb; k++) \
519 if (fmts->var[k] == fmt) { \
520 fmts->var[0] = fmt; \
529 static int reduce_formats_on_filter(AVFilterContext *filter)
531 int i, j, k, ret = 0;
533 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
534 format_count, ff_add_format);
535 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
536 format_count, ff_add_format);
537 REDUCE_FORMATS(uint64_t, AVFilterChannelLayouts, channel_layouts,
538 channel_layouts, nb_channel_layouts, ff_add_channel_layout);
543 static void reduce_formats(AVFilterGraph *graph)
550 for (i = 0; i < graph->filter_count; i++)
551 reduced |= reduce_formats_on_filter(graph->filters[i]);
555 static void swap_samplerates_on_filter(AVFilterContext *filter)
557 AVFilterLink *link = NULL;
561 for (i = 0; i < filter->nb_inputs; i++) {
562 link = filter->inputs[i];
564 if (link->type == AVMEDIA_TYPE_AUDIO &&
565 link->out_samplerates->format_count == 1)
568 if (i == filter->nb_inputs)
571 sample_rate = link->out_samplerates->formats[0];
573 for (i = 0; i < filter->nb_outputs; i++) {
574 AVFilterLink *outlink = filter->outputs[i];
575 int best_idx, best_diff = INT_MAX;
577 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
578 outlink->in_samplerates->format_count < 2)
581 for (j = 0; j < outlink->in_samplerates->format_count; j++) {
582 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
584 if (diff < best_diff) {
589 FFSWAP(int, outlink->in_samplerates->formats[0],
590 outlink->in_samplerates->formats[best_idx]);
594 static void swap_samplerates(AVFilterGraph *graph)
598 for (i = 0; i < graph->filter_count; i++)
599 swap_samplerates_on_filter(graph->filters[i]);
602 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
603 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
604 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
605 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
606 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
607 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
608 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
610 /* allowable substitutions for channel pairs when comparing layouts,
611 * ordered by priority for both values */
612 static const uint64_t ch_subst[][2] = {
613 { CH_FRONT_PAIR, CH_CENTER_PAIR },
614 { CH_FRONT_PAIR, CH_WIDE_PAIR },
615 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
616 { CH_CENTER_PAIR, CH_FRONT_PAIR },
617 { CH_CENTER_PAIR, CH_WIDE_PAIR },
618 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
619 { CH_WIDE_PAIR, CH_FRONT_PAIR },
620 { CH_WIDE_PAIR, CH_CENTER_PAIR },
621 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
622 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
623 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
624 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
625 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
626 { CH_SIDE_PAIR, CH_BACK_PAIR },
627 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
628 { CH_BACK_PAIR, CH_DIRECT_PAIR },
629 { CH_BACK_PAIR, CH_SIDE_PAIR },
630 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
631 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
632 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
633 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
636 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
638 AVFilterLink *link = NULL;
641 for (i = 0; i < filter->nb_inputs; i++) {
642 link = filter->inputs[i];
644 if (link->type == AVMEDIA_TYPE_AUDIO &&
645 link->out_channel_layouts->nb_channel_layouts == 1)
648 if (i == filter->nb_inputs)
651 for (i = 0; i < filter->nb_outputs; i++) {
652 AVFilterLink *outlink = filter->outputs[i];
653 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
655 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
656 outlink->in_channel_layouts->nb_channel_layouts < 2)
659 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
660 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
661 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
662 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
663 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
664 int count_diff = out_channels - in_channels;
665 int matched_channels, extra_channels;
668 /* channel substitution */
669 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
670 uint64_t cmp0 = ch_subst[k][0];
671 uint64_t cmp1 = ch_subst[k][1];
672 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
673 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
674 in_chlayout &= ~cmp0;
675 out_chlayout &= ~cmp1;
676 /* add score for channel match, minus a deduction for
677 having to do the substitution */
678 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
682 /* no penalty for LFE channel mismatch */
683 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
684 (out_chlayout & AV_CH_LOW_FREQUENCY))
686 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
687 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
689 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
691 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
693 score += 10 * matched_channels - 5 * extra_channels;
695 if (score > best_score ||
696 (count_diff < best_count_diff && score == best_score)) {
699 best_count_diff = count_diff;
702 av_assert0(best_idx >= 0);
703 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
704 outlink->in_channel_layouts->channel_layouts[best_idx]);
709 static void swap_channel_layouts(AVFilterGraph *graph)
713 for (i = 0; i < graph->filter_count; i++)
714 swap_channel_layouts_on_filter(graph->filters[i]);
717 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
719 AVFilterLink *link = NULL;
723 for (i = 0; i < filter->nb_inputs; i++) {
724 link = filter->inputs[i];
726 if (link->type == AVMEDIA_TYPE_AUDIO &&
727 link->out_formats->format_count == 1)
730 if (i == filter->nb_inputs)
733 format = link->out_formats->formats[0];
734 bps = av_get_bytes_per_sample(format);
736 for (i = 0; i < filter->nb_outputs; i++) {
737 AVFilterLink *outlink = filter->outputs[i];
738 int best_idx = -1, best_score = INT_MIN;
740 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
741 outlink->in_formats->format_count < 2)
744 for (j = 0; j < outlink->in_formats->format_count; j++) {
745 int out_format = outlink->in_formats->formats[j];
746 int out_bps = av_get_bytes_per_sample(out_format);
749 if (av_get_packed_sample_fmt(out_format) == format ||
750 av_get_planar_sample_fmt(out_format) == format) {
755 /* for s32 and float prefer double to prevent loss of information */
756 if (bps == 4 && out_bps == 8) {
761 /* prefer closest higher or equal bps */
762 score = -abs(out_bps - bps);
766 if (score > best_score) {
771 av_assert0(best_idx >= 0);
772 FFSWAP(int, outlink->in_formats->formats[0],
773 outlink->in_formats->formats[best_idx]);
777 static void swap_sample_fmts(AVFilterGraph *graph)
781 for (i = 0; i < graph->filter_count; i++)
782 swap_sample_fmts_on_filter(graph->filters[i]);
786 static int pick_formats(AVFilterGraph *graph)
793 for (i = 0; i < graph->filter_count; i++) {
794 AVFilterContext *filter = graph->filters[i];
795 if (filter->nb_inputs){
796 for (j = 0; j < filter->nb_inputs; j++){
797 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->format_count == 1) {
798 pick_format(filter->inputs[j], NULL);
803 if (filter->nb_outputs){
804 for (j = 0; j < filter->nb_outputs; j++){
805 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) {
806 pick_format(filter->outputs[j], NULL);
811 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
812 for (j = 0; j < filter->nb_outputs; j++) {
813 if(filter->outputs[j]->format<0) {
814 pick_format(filter->outputs[j], filter->inputs[0]);
822 for (i = 0; i < graph->filter_count; i++) {
823 AVFilterContext *filter = graph->filters[i];
825 for (j = 0; j < filter->nb_inputs; j++)
826 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
828 for (j = 0; j < filter->nb_outputs; j++)
829 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
836 * Configure the formats of all the links in the graph.
838 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
842 /* find supported formats from sub-filters, and merge along links */
843 if ((ret = query_formats(graph, log_ctx)) < 0)
846 /* Once everything is merged, it's possible that we'll still have
847 * multiple valid media format choices. We try to minimize the amount
848 * of format conversion inside filters */
849 reduce_formats(graph);
851 /* for audio filters, ensure the best format, sample rate and channel layout
853 swap_sample_fmts(graph);
854 swap_samplerates(graph);
855 swap_channel_layouts(graph);
857 if ((ret = pick_formats(graph)) < 0)
863 static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph,
867 int sink_links_count = 0, n = 0;
869 AVFilterLink **sinks;
871 for (i = 0; i < graph->filter_count; i++) {
872 f = graph->filters[i];
873 for (j = 0; j < f->nb_inputs; j++) {
874 f->inputs[j]->graph = graph;
875 f->inputs[j]->age_index = -1;
877 for (j = 0; j < f->nb_outputs; j++) {
878 f->outputs[j]->graph = graph;
879 f->outputs[j]->age_index= -1;
881 if (!f->nb_outputs) {
882 if (f->nb_inputs > INT_MAX - sink_links_count)
883 return AVERROR(EINVAL);
884 sink_links_count += f->nb_inputs;
887 sinks = av_calloc(sink_links_count, sizeof(*sinks));
889 return AVERROR(ENOMEM);
890 for (i = 0; i < graph->filter_count; i++) {
891 f = graph->filters[i];
892 if (!f->nb_outputs) {
893 for (j = 0; j < f->nb_inputs; j++) {
894 sinks[n] = f->inputs[j];
895 f->inputs[j]->age_index = n++;
899 av_assert0(n == sink_links_count);
900 graph->sink_links = sinks;
901 graph->sink_links_count = sink_links_count;
905 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
911 for (i = 0; i < graph->filter_count; i++) {
912 f = graph->filters[i];
914 for (j = 0; j < f->nb_inputs; j++) {
915 AVFilterLink *link = f->inputs[j];
916 AVFilterContext *fifo_ctx;
920 if (!link->dstpad->needs_fifo)
923 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
924 avfilter_get_by_name("fifo") :
925 avfilter_get_by_name("afifo");
927 snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++);
929 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
934 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
943 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
947 if ((ret = graph_check_validity(graphctx, log_ctx)))
949 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
951 if ((ret = graph_config_formats(graphctx, log_ctx)))
953 if ((ret = graph_config_links(graphctx, log_ctx)))
955 if ((ret = ff_avfilter_graph_config_pointers(graphctx, log_ctx)))
961 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
963 int i, r = AVERROR(ENOSYS);
968 if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
969 r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
970 if(r != AVERROR(ENOSYS))
977 for (i = 0; i < graph->filter_count; i++) {
978 AVFilterContext *filter = graph->filters[i];
979 if(!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)){
980 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
981 if(r != AVERROR(ENOSYS)) {
982 if((flags & AVFILTER_CMD_FLAG_ONE) || r<0)
991 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
998 for (i = 0; i < graph->filter_count; i++) {
999 AVFilterContext *filter = graph->filters[i];
1000 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1001 AVFilterCommand **que = &filter->command_queue, *next;
1002 while(*que && (*que)->time <= ts)
1003 que = &(*que)->next;
1005 *que= av_mallocz(sizeof(AVFilterCommand));
1006 (*que)->command = av_strdup(command);
1007 (*que)->arg = av_strdup(arg);
1009 (*que)->flags = flags;
1010 (*que)->next = next;
1011 if(flags & AVFILTER_CMD_FLAG_ONE)
1019 static void heap_bubble_up(AVFilterGraph *graph,
1020 AVFilterLink *link, int index)
1022 AVFilterLink **links = graph->sink_links;
1025 int parent = (index - 1) >> 1;
1026 if (links[parent]->current_pts >= link->current_pts)
1028 links[index] = links[parent];
1029 links[index]->age_index = index;
1032 links[index] = link;
1033 link->age_index = index;
1036 static void heap_bubble_down(AVFilterGraph *graph,
1037 AVFilterLink *link, int index)
1039 AVFilterLink **links = graph->sink_links;
1042 int child = 2 * index + 1;
1043 if (child >= graph->sink_links_count)
1045 if (child + 1 < graph->sink_links_count &&
1046 links[child + 1]->current_pts < links[child]->current_pts)
1048 if (link->current_pts < links[child]->current_pts)
1050 links[index] = links[child];
1051 links[index]->age_index = index;
1054 links[index] = link;
1055 link->age_index = index;
1058 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1060 heap_bubble_up (graph, link, link->age_index);
1061 heap_bubble_down(graph, link, link->age_index);
1065 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1067 while (graph->sink_links_count) {
1068 AVFilterLink *oldest = graph->sink_links[0];
1069 int r = ff_request_frame(oldest);
1070 if (r != AVERROR_EOF)
1072 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1073 oldest->dst ? oldest->dst->name : "unknown",
1074 oldest->dstpad ? oldest->dstpad->name : "unknown");
1075 /* EOF: remove the link from the heap */
1076 if (oldest->age_index < --graph->sink_links_count)
1077 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1079 oldest->age_index = -1;