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path: root/libavfilter/avfiltergraph.c (plain)
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1/*
2 * filter graphs
3 * Copyright (c) 2008 Vitor Sessak
4 * Copyright (c) 2007 Bobby Bingham
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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
21 */
22
23#include "config.h"
24
25#include <string.h>
26
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
35#define FF_INTERNAL_FIELDS 1
36#include "framequeue.h"
37
38#include "avfilter.h"
39#include "buffersink.h"
40#include "formats.h"
41#include "internal.h"
42#include "thread.h"
43
44#define OFFSET(x) offsetof(AVFilterGraph, x)
45#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
46static const AVOption filtergraph_options[] = {
47 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
48 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
49 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
50 { "threads", "Maximum number of threads", OFFSET(nb_threads),
51 AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
52 {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
53 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
54 {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
55 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
56 { NULL },
57};
58
59static const AVClass filtergraph_class = {
60 .class_name = "AVFilterGraph",
61 .item_name = av_default_item_name,
62 .version = LIBAVUTIL_VERSION_INT,
63 .option = filtergraph_options,
64 .category = AV_CLASS_CATEGORY_FILTER,
65};
66
67#if !HAVE_THREADS
68void ff_graph_thread_free(AVFilterGraph *graph)
69{
70}
71
72int ff_graph_thread_init(AVFilterGraph *graph)
73{
74 graph->thread_type = 0;
75 graph->nb_threads = 1;
76 return 0;
77}
78#endif
79
80AVFilterGraph *avfilter_graph_alloc(void)
81{
82 AVFilterGraph *ret = av_mallocz(sizeof(*ret));
83 if (!ret)
84 return NULL;
85
86 ret->internal = av_mallocz(sizeof(*ret->internal));
87 if (!ret->internal) {
88 av_freep(&ret);
89 return NULL;
90 }
91
92 ret->av_class = &filtergraph_class;
93 av_opt_set_defaults(ret);
94 ff_framequeue_global_init(&ret->internal->frame_queues);
95
96 return ret;
97}
98
99void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
100{
101 int i, j;
102 for (i = 0; i < graph->nb_filters; i++) {
103 if (graph->filters[i] == filter) {
104 FFSWAP(AVFilterContext*, graph->filters[i],
105 graph->filters[graph->nb_filters - 1]);
106 graph->nb_filters--;
107 filter->graph = NULL;
108 for (j = 0; j<filter->nb_outputs; j++)
109 if (filter->outputs[j])
110 filter->outputs[j]->graph = NULL;
111
112 return;
113 }
114 }
115}
116
117void avfilter_graph_free(AVFilterGraph **graph)
118{
119 if (!*graph)
120 return;
121
122 while ((*graph)->nb_filters)
123 avfilter_free((*graph)->filters[0]);
124
125 ff_graph_thread_free(*graph);
126
127 av_freep(&(*graph)->sink_links);
128
129 av_freep(&(*graph)->scale_sws_opts);
130 av_freep(&(*graph)->aresample_swr_opts);
131#if FF_API_LAVR_OPTS
132 av_freep(&(*graph)->resample_lavr_opts);
133#endif
134 av_freep(&(*graph)->filters);
135 av_freep(&(*graph)->internal);
136 av_freep(graph);
137}
138
139#if FF_API_AVFILTER_OPEN
140int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
141{
142 AVFilterContext **filters = av_realloc(graph->filters,
143 sizeof(*filters) * (graph->nb_filters + 1));
144 if (!filters)
145 return AVERROR(ENOMEM);
146
147 graph->filters = filters;
148 graph->filters[graph->nb_filters++] = filter;
149
150 filter->graph = graph;
151
152 return 0;
153}
154#endif
155
156int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
157 const char *name, const char *args, void *opaque,
158 AVFilterGraph *graph_ctx)
159{
160 int ret;
161
162 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
163 if (!*filt_ctx)
164 return AVERROR(ENOMEM);
165
166 ret = avfilter_init_str(*filt_ctx, args);
167 if (ret < 0)
168 goto fail;
169
170 return 0;
171
172fail:
173 if (*filt_ctx)
174 avfilter_free(*filt_ctx);
175 *filt_ctx = NULL;
176 return ret;
177}
178
179void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
180{
181 graph->disable_auto_convert = flags;
182}
183
184AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
185 const AVFilter *filter,
186 const char *name)
187{
188 AVFilterContext **filters, *s;
189
190 if (graph->thread_type && !graph->internal->thread_execute) {
191 if (graph->execute) {
192 graph->internal->thread_execute = graph->execute;
193 } else {
194 int ret = ff_graph_thread_init(graph);
195 if (ret < 0) {
196 av_log(graph, AV_LOG_ERROR, "Error initializing threading.\n");
197 return NULL;
198 }
199 }
200 }
201
202 s = ff_filter_alloc(filter, name);
203 if (!s)
204 return NULL;
205
206 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
207 if (!filters) {
208 avfilter_free(s);
209 return NULL;
210 }
211
212 graph->filters = filters;
213 graph->filters[graph->nb_filters++] = s;
214
215 s->graph = graph;
216
217 return s;
218}
219
220/**
221 * Check for the validity of graph.
222 *
223 * A graph is considered valid if all its input and output pads are
224 * connected.
225 *
226 * @return >= 0 in case of success, a negative value otherwise
227 */
228static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
229{
230 AVFilterContext *filt;
231 int i, j;
232
233 for (i = 0; i < graph->nb_filters; i++) {
234 const AVFilterPad *pad;
235 filt = graph->filters[i];
236
237 for (j = 0; j < filt->nb_inputs; j++) {
238 if (!filt->inputs[j] || !filt->inputs[j]->src) {
239 pad = &filt->input_pads[j];
240 av_log(log_ctx, AV_LOG_ERROR,
241 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
242 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
243 return AVERROR(EINVAL);
244 }
245 }
246
247 for (j = 0; j < filt->nb_outputs; j++) {
248 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
249 pad = &filt->output_pads[j];
250 av_log(log_ctx, AV_LOG_ERROR,
251 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
252 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
253 return AVERROR(EINVAL);
254 }
255 }
256 }
257
258 return 0;
259}
260
261/**
262 * Configure all the links of graphctx.
263 *
264 * @return >= 0 in case of success, a negative value otherwise
265 */
266static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
267{
268 AVFilterContext *filt;
269 int i, ret;
270
271 for (i = 0; i < graph->nb_filters; i++) {
272 filt = graph->filters[i];
273
274 if (!filt->nb_outputs) {
275 if ((ret = avfilter_config_links(filt)))
276 return ret;
277 }
278 }
279
280 return 0;
281}
282
283AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
284{
285 int i;
286
287 for (i = 0; i < graph->nb_filters; i++)
288 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
289 return graph->filters[i];
290
291 return NULL;
292}
293
294static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
295{
296 if (!l)
297 return;
298 if (l->nb_channel_layouts) {
299 if (l->all_layouts || l->all_counts)
300 av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
301 l->all_layouts = l->all_counts = 0;
302 } else {
303 if (l->all_counts && !l->all_layouts)
304 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
305 l->all_layouts = 1;
306 }
307}
308
309static int filter_query_formats(AVFilterContext *ctx)
310{
311 int ret, i;
312 AVFilterFormats *formats;
313 AVFilterChannelLayouts *chlayouts;
314 AVFilterFormats *samplerates;
315 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
316 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
317 AVMEDIA_TYPE_VIDEO;
318
319 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
320 if (ret != AVERROR(EAGAIN))
321 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
322 ctx->name, av_err2str(ret));
323 return ret;
324 }
325
326 for (i = 0; i < ctx->nb_inputs; i++)
327 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
328 for (i = 0; i < ctx->nb_outputs; i++)
329 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
330
331 formats = ff_all_formats(type);
332 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
333 return ret;
334 if (type == AVMEDIA_TYPE_AUDIO) {
335 samplerates = ff_all_samplerates();
336 if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
337 return ret;
338 chlayouts = ff_all_channel_layouts();
339 if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
340 return ret;
341 }
342 return 0;
343}
344
345static int formats_declared(AVFilterContext *f)
346{
347 int i;
348
349 for (i = 0; i < f->nb_inputs; i++) {
350 if (!f->inputs[i]->out_formats)
351 return 0;
352 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
353 !(f->inputs[i]->out_samplerates &&
354 f->inputs[i]->out_channel_layouts))
355 return 0;
356 }
357 for (i = 0; i < f->nb_outputs; i++) {
358 if (!f->outputs[i]->in_formats)
359 return 0;
360 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
361 !(f->outputs[i]->in_samplerates &&
362 f->outputs[i]->in_channel_layouts))
363 return 0;
364 }
365 return 1;
366}
367
368static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
369{
370 AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
371 if (a) {
372 a->refcount = 0;
373 a->refs = NULL;
374 a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
375 if (!a->formats && arg->formats)
376 av_freep(&a);
377 }
378 return a;
379}
380
381static int can_merge_formats(AVFilterFormats *a_arg,
382 AVFilterFormats *b_arg,
383 enum AVMediaType type,
384 int is_sample_rate)
385{
386 AVFilterFormats *a, *b, *ret;
387 if (a_arg == b_arg)
388 return 1;
389 a = clone_filter_formats(a_arg);
390 b = clone_filter_formats(b_arg);
391
392 if (!a || !b) {
393 if (a)
394 av_freep(&a->formats);
395 if (b)
396 av_freep(&b->formats);
397
398 av_freep(&a);
399 av_freep(&b);
400
401 return 0;
402 }
403
404 if (is_sample_rate) {
405 ret = ff_merge_samplerates(a, b);
406 } else {
407 ret = ff_merge_formats(a, b, type);
408 }
409 if (ret) {
410 av_freep(&ret->formats);
411 av_freep(&ret->refs);
412 av_freep(&ret);
413 return 1;
414 } else {
415 av_freep(&a->formats);
416 av_freep(&b->formats);
417 av_freep(&a);
418 av_freep(&b);
419 return 0;
420 }
421}
422
423/**
424 * Perform one round of query_formats() and merging formats lists on the
425 * filter graph.
426 * @return >=0 if all links formats lists could be queried and merged;
427 * AVERROR(EAGAIN) some progress was made in the queries or merging
428 * and a later call may succeed;
429 * AVERROR(EIO) (may be changed) plus a log message if no progress
430 * was made and the negotiation is stuck;
431 * a negative error code if some other error happened
432 */
433static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
434{
435 int i, j, ret;
436 int scaler_count = 0, resampler_count = 0;
437 int count_queried = 0; /* successful calls to query_formats() */
438 int count_merged = 0; /* successful merge of formats lists */
439 int count_already_merged = 0; /* lists already merged */
440 int count_delayed = 0; /* lists that need to be merged later */
441
442 for (i = 0; i < graph->nb_filters; i++) {
443 AVFilterContext *f = graph->filters[i];
444 if (formats_declared(f))
445 continue;
446 if (f->filter->query_formats)
447 ret = filter_query_formats(f);
448 else
449 ret = ff_default_query_formats(f);
450 if (ret < 0 && ret != AVERROR(EAGAIN))
451 return ret;
452 /* note: EAGAIN could indicate a partial success, not counted yet */
453 count_queried += ret >= 0;
454 }
455
456 /* go through and merge as many format lists as possible */
457 for (i = 0; i < graph->nb_filters; i++) {
458 AVFilterContext *filter = graph->filters[i];
459
460 for (j = 0; j < filter->nb_inputs; j++) {
461 AVFilterLink *link = filter->inputs[j];
462 int convert_needed = 0;
463
464 if (!link)
465 continue;
466
467 if (link->in_formats != link->out_formats
468 && link->in_formats && link->out_formats)
469 if (!can_merge_formats(link->in_formats, link->out_formats,
470 link->type, 0))
471 convert_needed = 1;
472 if (link->type == AVMEDIA_TYPE_AUDIO) {
473 if (link->in_samplerates != link->out_samplerates
474 && link->in_samplerates && link->out_samplerates)
475 if (!can_merge_formats(link->in_samplerates,
476 link->out_samplerates,
477 0, 1))
478 convert_needed = 1;
479 }
480
481#define MERGE_DISPATCH(field, statement) \
482 if (!(link->in_ ## field && link->out_ ## field)) { \
483 count_delayed++; \
484 } else if (link->in_ ## field == link->out_ ## field) { \
485 count_already_merged++; \
486 } else if (!convert_needed) { \
487 count_merged++; \
488 statement \
489 }
490
491 if (link->type == AVMEDIA_TYPE_AUDIO) {
492 MERGE_DISPATCH(channel_layouts,
493 if (!ff_merge_channel_layouts(link->in_channel_layouts,
494 link->out_channel_layouts))
495 convert_needed = 1;
496 )
497 MERGE_DISPATCH(samplerates,
498 if (!ff_merge_samplerates(link->in_samplerates,
499 link->out_samplerates))
500 convert_needed = 1;
501 )
502 }
503 MERGE_DISPATCH(formats,
504 if (!ff_merge_formats(link->in_formats, link->out_formats,
505 link->type))
506 convert_needed = 1;
507 )
508#undef MERGE_DISPATCH
509
510 if (convert_needed) {
511 AVFilterContext *convert;
512 AVFilter *filter;
513 AVFilterLink *inlink, *outlink;
514 char scale_args[256];
515 char inst_name[30];
516
517 if (graph->disable_auto_convert) {
518 av_log(log_ctx, AV_LOG_ERROR,
519 "The filters '%s' and '%s' do not have a common format "
520 "and automatic conversion is disabled.\n",
521 link->src->name, link->dst->name);
522 return AVERROR(EINVAL);
523 }
524
525 /* couldn't merge format lists. auto-insert conversion filter */
526 switch (link->type) {
527 case AVMEDIA_TYPE_VIDEO:
528 if (!(filter = avfilter_get_by_name("scale"))) {
529 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
530 "not present, cannot convert pixel formats.\n");
531 return AVERROR(EINVAL);
532 }
533
534 snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
535 scaler_count++);
536
537 if ((ret = avfilter_graph_create_filter(&convert, filter,
538 inst_name, graph->scale_sws_opts, NULL,
539 graph)) < 0)
540 return ret;
541 break;
542 case AVMEDIA_TYPE_AUDIO:
543 if (!(filter = avfilter_get_by_name("aresample"))) {
544 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
545 "not present, cannot convert audio formats.\n");
546 return AVERROR(EINVAL);
547 }
548
549 snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
550 resampler_count++);
551 scale_args[0] = '\0';
552 if (graph->aresample_swr_opts)
553 snprintf(scale_args, sizeof(scale_args), "%s",
554 graph->aresample_swr_opts);
555 if ((ret = avfilter_graph_create_filter(&convert, filter,
556 inst_name, graph->aresample_swr_opts,
557 NULL, graph)) < 0)
558 return ret;
559 break;
560 default:
561 return AVERROR(EINVAL);
562 }
563
564 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
565 return ret;
566
567 if ((ret = filter_query_formats(convert)) < 0)
568 return ret;
569
570 inlink = convert->inputs[0];
571 outlink = convert->outputs[0];
572 av_assert0( inlink-> in_formats->refcount > 0);
573 av_assert0( inlink->out_formats->refcount > 0);
574 av_assert0(outlink-> in_formats->refcount > 0);
575 av_assert0(outlink->out_formats->refcount > 0);
576 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
577 av_assert0( inlink-> in_samplerates->refcount > 0);
578 av_assert0( inlink->out_samplerates->refcount > 0);
579 av_assert0(outlink-> in_samplerates->refcount > 0);
580 av_assert0(outlink->out_samplerates->refcount > 0);
581 av_assert0( inlink-> in_channel_layouts->refcount > 0);
582 av_assert0( inlink->out_channel_layouts->refcount > 0);
583 av_assert0(outlink-> in_channel_layouts->refcount > 0);
584 av_assert0(outlink->out_channel_layouts->refcount > 0);
585 }
586 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
587 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
588 ret = AVERROR(ENOSYS);
589 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
590 (!ff_merge_samplerates(inlink->in_samplerates,
591 inlink->out_samplerates) ||
592 !ff_merge_channel_layouts(inlink->in_channel_layouts,
593 inlink->out_channel_layouts)))
594 ret = AVERROR(ENOSYS);
595 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
596 (!ff_merge_samplerates(outlink->in_samplerates,
597 outlink->out_samplerates) ||
598 !ff_merge_channel_layouts(outlink->in_channel_layouts,
599 outlink->out_channel_layouts)))
600 ret = AVERROR(ENOSYS);
601
602 if (ret < 0) {
603 av_log(log_ctx, AV_LOG_ERROR,
604 "Impossible to convert between the formats supported by the filter "
605 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
606 return ret;
607 }
608 }
609 }
610 }
611
612 av_log(graph, AV_LOG_DEBUG, "query_formats: "
613 "%d queried, %d merged, %d already done, %d delayed\n",
614 count_queried, count_merged, count_already_merged, count_delayed);
615 if (count_delayed) {
616 AVBPrint bp;
617
618 /* if count_queried > 0, one filter at least did set its formats,
619 that will give additional information to its neighbour;
620 if count_merged > 0, one pair of formats lists at least was merged,
621 that will give additional information to all connected filters;
622 in both cases, progress was made and a new round must be done */
623 if (count_queried || count_merged)
624 return AVERROR(EAGAIN);
625 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
626 for (i = 0; i < graph->nb_filters; i++)
627 if (!formats_declared(graph->filters[i]))
628 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
629 graph->filters[i]->name);
630 av_log(graph, AV_LOG_ERROR,
631 "The following filters could not choose their formats: %s\n"
632 "Consider inserting the (a)format filter near their input or "
633 "output.\n", bp.str);
634 return AVERROR(EIO);
635 }
636 return 0;
637}
638
639static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
640{
641 int score = 0;
642
643 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
644 score ++;
645
646 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
647 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
648 }else
649 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
650
651 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
652 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
653 score += 20;
654
655 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
656 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
657 score += 2;
658
659 return score;
660}
661
662static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
663 enum AVSampleFormat src_fmt)
664{
665 int score1, score2;
666
667 score1 = get_fmt_score(dst_fmt1, src_fmt);
668 score2 = get_fmt_score(dst_fmt2, src_fmt);
669
670 return score1 < score2 ? dst_fmt1 : dst_fmt2;
671}
672
673static int pick_format(AVFilterLink *link, AVFilterLink *ref)
674{
675 if (!link || !link->in_formats)
676 return 0;
677
678 if (link->type == AVMEDIA_TYPE_VIDEO) {
679 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
680 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
681 enum AVPixelFormat best= AV_PIX_FMT_NONE;
682 int i;
683 for (i=0; i<link->in_formats->nb_formats; i++) {
684 enum AVPixelFormat p = link->in_formats->formats[i];
685 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
686 }
687 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
688 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
689 av_get_pix_fmt_name(ref->format), has_alpha);
690 link->in_formats->formats[0] = best;
691 }
692 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
693 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
694 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
695 int i;
696 for (i=0; i<link->in_formats->nb_formats; i++) {
697 enum AVSampleFormat p = link->in_formats->formats[i];
698 best = find_best_sample_fmt_of_2(best, p, ref->format);
699 }
700 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
701 av_get_sample_fmt_name(best), link->in_formats->nb_formats,
702 av_get_sample_fmt_name(ref->format));
703 link->in_formats->formats[0] = best;
704 }
705 }
706
707 link->in_formats->nb_formats = 1;
708 link->format = link->in_formats->formats[0];
709
710 if (link->type == AVMEDIA_TYPE_AUDIO) {
711 if (!link->in_samplerates->nb_formats) {
712 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
713 " the link between filters %s and %s.\n", link->src->name,
714 link->dst->name);
715 return AVERROR(EINVAL);
716 }
717 link->in_samplerates->nb_formats = 1;
718 link->sample_rate = link->in_samplerates->formats[0];
719
720 if (link->in_channel_layouts->all_layouts) {
721 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
722 " the link between filters %s and %s.\n", link->src->name,
723 link->dst->name);
724 if (!link->in_channel_layouts->all_counts)
725 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
726 "supported, try specifying a channel layout using "
727 "'aformat=channel_layouts=something'.\n");
728 return AVERROR(EINVAL);
729 }
730 link->in_channel_layouts->nb_channel_layouts = 1;
731 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
732 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
733 link->channel_layout = 0;
734 else
735 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
736 }
737
738 ff_formats_unref(&link->in_formats);
739 ff_formats_unref(&link->out_formats);
740 ff_formats_unref(&link->in_samplerates);
741 ff_formats_unref(&link->out_samplerates);
742 ff_channel_layouts_unref(&link->in_channel_layouts);
743 ff_channel_layouts_unref(&link->out_channel_layouts);
744
745 return 0;
746}
747
748#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
749do { \
750 for (i = 0; i < filter->nb_inputs; i++) { \
751 AVFilterLink *link = filter->inputs[i]; \
752 fmt_type fmt; \
753 \
754 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
755 continue; \
756 fmt = link->out_ ## list->var[0]; \
757 \
758 for (j = 0; j < filter->nb_outputs; j++) { \
759 AVFilterLink *out_link = filter->outputs[j]; \
760 list_type *fmts; \
761 \
762 if (link->type != out_link->type || \
763 out_link->in_ ## list->nb == 1) \
764 continue; \
765 fmts = out_link->in_ ## list; \
766 \
767 if (!out_link->in_ ## list->nb) { \
768 if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
769 return ret; \
770 ret = 1; \
771 break; \
772 } \
773 \
774 for (k = 0; k < out_link->in_ ## list->nb; k++) \
775 if (fmts->var[k] == fmt) { \
776 fmts->var[0] = fmt; \
777 fmts->nb = 1; \
778 ret = 1; \
779 break; \
780 } \
781 } \
782 } \
783} while (0)
784
785static int reduce_formats_on_filter(AVFilterContext *filter)
786{
787 int i, j, k, ret = 0;
788
789 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
790 nb_formats, ff_add_format, ff_formats_unref);
791 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
792 nb_formats, ff_add_format, ff_formats_unref);
793
794 /* reduce channel layouts */
795 for (i = 0; i < filter->nb_inputs; i++) {
796 AVFilterLink *inlink = filter->inputs[i];
797 uint64_t fmt;
798
799 if (!inlink->out_channel_layouts ||
800 inlink->out_channel_layouts->nb_channel_layouts != 1)
801 continue;
802 fmt = inlink->out_channel_layouts->channel_layouts[0];
803
804 for (j = 0; j < filter->nb_outputs; j++) {
805 AVFilterLink *outlink = filter->outputs[j];
806 AVFilterChannelLayouts *fmts;
807
808 fmts = outlink->in_channel_layouts;
809 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
810 continue;
811
812 if (fmts->all_layouts &&
813 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
814 /* Turn the infinite list into a singleton */
815 fmts->all_layouts = fmts->all_counts = 0;
816 if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
817 ret = 1;
818 break;
819 }
820
821 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
822 if (fmts->channel_layouts[k] == fmt) {
823 fmts->channel_layouts[0] = fmt;
824 fmts->nb_channel_layouts = 1;
825 ret = 1;
826 break;
827 }
828 }
829 }
830 }
831
832 return ret;
833}
834
835static int reduce_formats(AVFilterGraph *graph)
836{
837 int i, reduced, ret;
838
839 do {
840 reduced = 0;
841
842 for (i = 0; i < graph->nb_filters; i++) {
843 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
844 return ret;
845 reduced |= ret;
846 }
847 } while (reduced);
848
849 return 0;
850}
851
852static void swap_samplerates_on_filter(AVFilterContext *filter)
853{
854 AVFilterLink *link = NULL;
855 int sample_rate;
856 int i, j;
857
858 for (i = 0; i < filter->nb_inputs; i++) {
859 link = filter->inputs[i];
860
861 if (link->type == AVMEDIA_TYPE_AUDIO &&
862 link->out_samplerates->nb_formats== 1)
863 break;
864 }
865 if (i == filter->nb_inputs)
866 return;
867
868 sample_rate = link->out_samplerates->formats[0];
869
870 for (i = 0; i < filter->nb_outputs; i++) {
871 AVFilterLink *outlink = filter->outputs[i];
872 int best_idx, best_diff = INT_MAX;
873
874 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
875 outlink->in_samplerates->nb_formats < 2)
876 continue;
877
878 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
879 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
880
881 av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
882
883 if (diff < best_diff) {
884 best_diff = diff;
885 best_idx = j;
886 }
887 }
888 FFSWAP(int, outlink->in_samplerates->formats[0],
889 outlink->in_samplerates->formats[best_idx]);
890 }
891}
892
893static void swap_samplerates(AVFilterGraph *graph)
894{
895 int i;
896
897 for (i = 0; i < graph->nb_filters; i++)
898 swap_samplerates_on_filter(graph->filters[i]);
899}
900
901#define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
902#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
903#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
904#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
905#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
906#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
907#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
908
909/* allowable substitutions for channel pairs when comparing layouts,
910 * ordered by priority for both values */
911static const uint64_t ch_subst[][2] = {
912 { CH_FRONT_PAIR, CH_CENTER_PAIR },
913 { CH_FRONT_PAIR, CH_WIDE_PAIR },
914 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
915 { CH_CENTER_PAIR, CH_FRONT_PAIR },
916 { CH_CENTER_PAIR, CH_WIDE_PAIR },
917 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
918 { CH_WIDE_PAIR, CH_FRONT_PAIR },
919 { CH_WIDE_PAIR, CH_CENTER_PAIR },
920 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
921 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
922 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
923 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
924 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
925 { CH_SIDE_PAIR, CH_BACK_PAIR },
926 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
927 { CH_BACK_PAIR, CH_DIRECT_PAIR },
928 { CH_BACK_PAIR, CH_SIDE_PAIR },
929 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
930 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
931 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
932 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
933};
934
935static void swap_channel_layouts_on_filter(AVFilterContext *filter)
936{
937 AVFilterLink *link = NULL;
938 int i, j, k;
939
940 for (i = 0; i < filter->nb_inputs; i++) {
941 link = filter->inputs[i];
942
943 if (link->type == AVMEDIA_TYPE_AUDIO &&
944 link->out_channel_layouts->nb_channel_layouts == 1)
945 break;
946 }
947 if (i == filter->nb_inputs)
948 return;
949
950 for (i = 0; i < filter->nb_outputs; i++) {
951 AVFilterLink *outlink = filter->outputs[i];
952 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
953
954 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
955 outlink->in_channel_layouts->nb_channel_layouts < 2)
956 continue;
957
958 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
959 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
960 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
961 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
962 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
963 int count_diff = out_channels - in_channels;
964 int matched_channels, extra_channels;
965 int score = 100000;
966
967 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
968 /* Compute score in case the input or output layout encodes
969 a channel count; in this case the score is not altered by
970 the computation afterwards, as in_chlayout and
971 out_chlayout have both been set to 0 */
972 if (FF_LAYOUT2COUNT(in_chlayout))
973 in_channels = FF_LAYOUT2COUNT(in_chlayout);
974 if (FF_LAYOUT2COUNT(out_chlayout))
975 out_channels = FF_LAYOUT2COUNT(out_chlayout);
976 score -= 10000 + FFABS(out_channels - in_channels) +
977 (in_channels > out_channels ? 10000 : 0);
978 in_chlayout = out_chlayout = 0;
979 /* Let the remaining computation run, even if the score
980 value is not altered */
981 }
982
983 /* channel substitution */
984 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
985 uint64_t cmp0 = ch_subst[k][0];
986 uint64_t cmp1 = ch_subst[k][1];
987 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
988 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
989 in_chlayout &= ~cmp0;
990 out_chlayout &= ~cmp1;
991 /* add score for channel match, minus a deduction for
992 having to do the substitution */
993 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
994 }
995 }
996
997 /* no penalty for LFE channel mismatch */
998 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
999 (out_chlayout & AV_CH_LOW_FREQUENCY))
1000 score += 10;
1001 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1002 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1003
1004 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1005 out_chlayout);
1006 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1007 (~in_chlayout));
1008 score += 10 * matched_channels - 5 * extra_channels;
1009
1010 if (score > best_score ||
1011 (count_diff < best_count_diff && score == best_score)) {
1012 best_score = score;
1013 best_idx = j;
1014 best_count_diff = count_diff;
1015 }
1016 }
1017 av_assert0(best_idx >= 0);
1018 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1019 outlink->in_channel_layouts->channel_layouts[best_idx]);
1020 }
1021
1022}
1023
1024static void swap_channel_layouts(AVFilterGraph *graph)
1025{
1026 int i;
1027
1028 for (i = 0; i < graph->nb_filters; i++)
1029 swap_channel_layouts_on_filter(graph->filters[i]);
1030}
1031
1032static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1033{
1034 AVFilterLink *link = NULL;
1035 int format, bps;
1036 int i, j;
1037
1038 for (i = 0; i < filter->nb_inputs; i++) {
1039 link = filter->inputs[i];
1040
1041 if (link->type == AVMEDIA_TYPE_AUDIO &&
1042 link->out_formats->nb_formats == 1)
1043 break;
1044 }
1045 if (i == filter->nb_inputs)
1046 return;
1047
1048 format = link->out_formats->formats[0];
1049 bps = av_get_bytes_per_sample(format);
1050
1051 for (i = 0; i < filter->nb_outputs; i++) {
1052 AVFilterLink *outlink = filter->outputs[i];
1053 int best_idx = -1, best_score = INT_MIN;
1054
1055 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1056 outlink->in_formats->nb_formats < 2)
1057 continue;
1058
1059 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1060 int out_format = outlink->in_formats->formats[j];
1061 int out_bps = av_get_bytes_per_sample(out_format);
1062 int score;
1063
1064 if (av_get_packed_sample_fmt(out_format) == format ||
1065 av_get_planar_sample_fmt(out_format) == format) {
1066 best_idx = j;
1067 break;
1068 }
1069
1070 /* for s32 and float prefer double to prevent loss of information */
1071 if (bps == 4 && out_bps == 8) {
1072 best_idx = j;
1073 break;
1074 }
1075
1076 /* prefer closest higher or equal bps */
1077 score = -abs(out_bps - bps);
1078 if (out_bps >= bps)
1079 score += INT_MAX/2;
1080
1081 if (score > best_score) {
1082 best_score = score;
1083 best_idx = j;
1084 }
1085 }
1086 av_assert0(best_idx >= 0);
1087 FFSWAP(int, outlink->in_formats->formats[0],
1088 outlink->in_formats->formats[best_idx]);
1089 }
1090}
1091
1092static void swap_sample_fmts(AVFilterGraph *graph)
1093{
1094 int i;
1095
1096 for (i = 0; i < graph->nb_filters; i++)
1097 swap_sample_fmts_on_filter(graph->filters[i]);
1098
1099}
1100
1101static int pick_formats(AVFilterGraph *graph)
1102{
1103 int i, j, ret;
1104 int change;
1105
1106 do{
1107 change = 0;
1108 for (i = 0; i < graph->nb_filters; i++) {
1109 AVFilterContext *filter = graph->filters[i];
1110 if (filter->nb_inputs){
1111 for (j = 0; j < filter->nb_inputs; j++){
1112 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1113 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1114 return ret;
1115 change = 1;
1116 }
1117 }
1118 }
1119 if (filter->nb_outputs){
1120 for (j = 0; j < filter->nb_outputs; j++){
1121 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1122 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1123 return ret;
1124 change = 1;
1125 }
1126 }
1127 }
1128 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1129 for (j = 0; j < filter->nb_outputs; j++) {
1130 if(filter->outputs[j]->format<0) {
1131 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1132 return ret;
1133 change = 1;
1134 }
1135 }
1136 }
1137 }
1138 }while(change);
1139
1140 for (i = 0; i < graph->nb_filters; i++) {
1141 AVFilterContext *filter = graph->filters[i];
1142
1143 for (j = 0; j < filter->nb_inputs; j++)
1144 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1145 return ret;
1146 for (j = 0; j < filter->nb_outputs; j++)
1147 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1148 return ret;
1149 }
1150 return 0;
1151}
1152
1153/**
1154 * Configure the formats of all the links in the graph.
1155 */
1156static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1157{
1158 int ret;
1159
1160 /* find supported formats from sub-filters, and merge along links */
1161 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1162 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1163 if (ret < 0)
1164 return ret;
1165
1166 /* Once everything is merged, it's possible that we'll still have
1167 * multiple valid media format choices. We try to minimize the amount
1168 * of format conversion inside filters */
1169 if ((ret = reduce_formats(graph)) < 0)
1170 return ret;
1171
1172 /* for audio filters, ensure the best format, sample rate and channel layout
1173 * is selected */
1174 swap_sample_fmts(graph);
1175 swap_samplerates(graph);
1176 swap_channel_layouts(graph);
1177
1178 if ((ret = pick_formats(graph)) < 0)
1179 return ret;
1180
1181 return 0;
1182}
1183
1184static int graph_config_pointers(AVFilterGraph *graph,
1185 AVClass *log_ctx)
1186{
1187 unsigned i, j;
1188 int sink_links_count = 0, n = 0;
1189 AVFilterContext *f;
1190 AVFilterLink **sinks;
1191
1192 for (i = 0; i < graph->nb_filters; i++) {
1193 f = graph->filters[i];
1194 for (j = 0; j < f->nb_inputs; j++) {
1195 f->inputs[j]->graph = graph;
1196 f->inputs[j]->age_index = -1;
1197 }
1198 for (j = 0; j < f->nb_outputs; j++) {
1199 f->outputs[j]->graph = graph;
1200 f->outputs[j]->age_index= -1;
1201 }
1202 if (!f->nb_outputs) {
1203 if (f->nb_inputs > INT_MAX - sink_links_count)
1204 return AVERROR(EINVAL);
1205 sink_links_count += f->nb_inputs;
1206 }
1207 }
1208 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1209 if (!sinks)
1210 return AVERROR(ENOMEM);
1211 for (i = 0; i < graph->nb_filters; i++) {
1212 f = graph->filters[i];
1213 if (!f->nb_outputs) {
1214 for (j = 0; j < f->nb_inputs; j++) {
1215 sinks[n] = f->inputs[j];
1216 f->inputs[j]->age_index = n++;
1217 }
1218 }
1219 }
1220 av_assert0(n == sink_links_count);
1221 graph->sink_links = sinks;
1222 graph->sink_links_count = sink_links_count;
1223 return 0;
1224}
1225
1226static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1227{
1228 AVFilterContext *f;
1229 int i, j, ret;
1230 int fifo_count = 0;
1231
1232 for (i = 0; i < graph->nb_filters; i++) {
1233 f = graph->filters[i];
1234
1235 for (j = 0; j < f->nb_inputs; j++) {
1236 AVFilterLink *link = f->inputs[j];
1237 AVFilterContext *fifo_ctx;
1238 AVFilter *fifo;
1239 char name[32];
1240
1241 if (!link->dstpad->needs_fifo)
1242 continue;
1243
1244 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1245 avfilter_get_by_name("fifo") :
1246 avfilter_get_by_name("afifo");
1247
1248 snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1249
1250 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1251 NULL, graph);
1252 if (ret < 0)
1253 return ret;
1254
1255 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1256 if (ret < 0)
1257 return ret;
1258 }
1259 }
1260
1261 return 0;
1262}
1263
1264int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1265{
1266 int ret;
1267
1268 if ((ret = graph_check_validity(graphctx, log_ctx)))
1269 return ret;
1270 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1271 return ret;
1272 if ((ret = graph_config_formats(graphctx, log_ctx)))
1273 return ret;
1274 if ((ret = graph_config_links(graphctx, log_ctx)))
1275 return ret;
1276 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1277 return ret;
1278
1279 return 0;
1280}
1281
1282int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1283{
1284 int i, r = AVERROR(ENOSYS);
1285
1286 if (!graph)
1287 return r;
1288
1289 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1290 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1291 if (r != AVERROR(ENOSYS))
1292 return r;
1293 }
1294
1295 if (res_len && res)
1296 res[0] = 0;
1297
1298 for (i = 0; i < graph->nb_filters; i++) {
1299 AVFilterContext *filter = graph->filters[i];
1300 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1301 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1302 if (r != AVERROR(ENOSYS)) {
1303 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1304 return r;
1305 }
1306 }
1307 }
1308
1309 return r;
1310}
1311
1312int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1313{
1314 int i;
1315
1316 if(!graph)
1317 return 0;
1318
1319 for (i = 0; i < graph->nb_filters; i++) {
1320 AVFilterContext *filter = graph->filters[i];
1321 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1322 AVFilterCommand **queue = &filter->command_queue, *next;
1323 while (*queue && (*queue)->time <= ts)
1324 queue = &(*queue)->next;
1325 next = *queue;
1326 *queue = av_mallocz(sizeof(AVFilterCommand));
1327 if (!*queue)
1328 return AVERROR(ENOMEM);
1329
1330 (*queue)->command = av_strdup(command);
1331 (*queue)->arg = av_strdup(arg);
1332 (*queue)->time = ts;
1333 (*queue)->flags = flags;
1334 (*queue)->next = next;
1335 if(flags & AVFILTER_CMD_FLAG_ONE)
1336 return 0;
1337 }
1338 }
1339
1340 return 0;
1341}
1342
1343static void heap_bubble_up(AVFilterGraph *graph,
1344 AVFilterLink *link, int index)
1345{
1346 AVFilterLink **links = graph->sink_links;
1347
1348 av_assert0(index >= 0);
1349
1350 while (index) {
1351 int parent = (index - 1) >> 1;
1352 if (links[parent]->current_pts_us >= link->current_pts_us)
1353 break;
1354 links[index] = links[parent];
1355 links[index]->age_index = index;
1356 index = parent;
1357 }
1358 links[index] = link;
1359 link->age_index = index;
1360}
1361
1362static void heap_bubble_down(AVFilterGraph *graph,
1363 AVFilterLink *link, int index)
1364{
1365 AVFilterLink **links = graph->sink_links;
1366
1367 av_assert0(index >= 0);
1368
1369 while (1) {
1370 int child = 2 * index + 1;
1371 if (child >= graph->sink_links_count)
1372 break;
1373 if (child + 1 < graph->sink_links_count &&
1374 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1375 child++;
1376 if (link->current_pts_us < links[child]->current_pts_us)
1377 break;
1378 links[index] = links[child];
1379 links[index]->age_index = index;
1380 index = child;
1381 }
1382 links[index] = link;
1383 link->age_index = index;
1384}
1385
1386void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1387{
1388 heap_bubble_up (graph, link, link->age_index);
1389 heap_bubble_down(graph, link, link->age_index);
1390}
1391
1392int avfilter_graph_request_oldest(AVFilterGraph *graph)
1393{
1394 AVFilterLink *oldest = graph->sink_links[0];
1395 int64_t frame_count;
1396 int r;
1397
1398 while (graph->sink_links_count) {
1399 oldest = graph->sink_links[0];
1400 if (oldest->dst->filter->activate) {
1401 /* For now, buffersink is the only filter implementing activate. */
1402 r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1403 AV_BUFFERSINK_FLAG_PEEK);
1404 if (r != AVERROR_EOF)
1405 return r;
1406 } else {
1407 r = ff_request_frame(oldest);
1408 }
1409 if (r != AVERROR_EOF)
1410 break;
1411 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1412 oldest->dst ? oldest->dst->name : "unknown",
1413 oldest->dstpad ? oldest->dstpad->name : "unknown");
1414 /* EOF: remove the link from the heap */
1415 if (oldest->age_index < --graph->sink_links_count)
1416 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1417 oldest->age_index);
1418 oldest->age_index = -1;
1419 }
1420 if (!graph->sink_links_count)
1421 return AVERROR_EOF;
1422 av_assert1(!oldest->dst->filter->activate);
1423 av_assert1(oldest->age_index >= 0);
1424 frame_count = oldest->frame_count_out;
1425 while (frame_count == oldest->frame_count_out) {
1426 r = ff_filter_graph_run_once(graph);
1427 if (r == AVERROR(EAGAIN) &&
1428 !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1429 !oldest->status_in)
1430 ff_request_frame(oldest);
1431 else if (r < 0)
1432 return r;
1433 }
1434 return 0;
1435}
1436
1437int ff_filter_graph_run_once(AVFilterGraph *graph)
1438{
1439 AVFilterContext *filter;
1440 unsigned i;
1441
1442 av_assert0(graph->nb_filters);
1443 filter = graph->filters[0];
1444 for (i = 1; i < graph->nb_filters; i++)
1445 if (graph->filters[i]->ready > filter->ready)
1446 filter = graph->filters[i];
1447 if (!filter->ready)
1448 return AVERROR(EAGAIN);
1449 return ff_filter_activate(filter);
1450}
1451
generated by cgit at 2024-05-17 02:03:45 (GMT)