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/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35
36 #define FF_INTERNAL_FIELDS 1
37 #include "framequeue.h"
38
39 #include "avfilter.h"
40 #include "buffersink.h"
41 #include "formats.h"
42 #include "internal.h"
43 #include "thread.h"
44
45 #define OFFSET(x) offsetof(AVFilterGraph, x)
46 #define F AV_OPT_FLAG_FILTERING_PARAM
47 #define V AV_OPT_FLAG_VIDEO_PARAM
48 #define A AV_OPT_FLAG_AUDIO_PARAM
49 static const AVOption filtergraph_options[] = {
50 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
51 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, F|V|A, "thread_type" },
52 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = F|V|A, .unit = "thread_type" },
53 { "threads", "Maximum number of threads", OFFSET(nb_threads),
54 AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, F|V|A },
55 {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) ,
56 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|V },
57 {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
58 AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|A },
59 { NULL },
60 };
61
62 static const AVClass filtergraph_class = {
63 .class_name = "AVFilterGraph",
64 .item_name = av_default_item_name,
65 .version = LIBAVUTIL_VERSION_INT,
66 .option = filtergraph_options,
67 .category = AV_CLASS_CATEGORY_FILTER,
68 };
69
70 #if !HAVE_THREADS
ff_graph_thread_free(AVFilterGraph * graph)71 void ff_graph_thread_free(AVFilterGraph *graph)
72 {
73 }
74
ff_graph_thread_init(AVFilterGraph * graph)75 int ff_graph_thread_init(AVFilterGraph *graph)
76 {
77 graph->thread_type = 0;
78 graph->nb_threads = 1;
79 return 0;
80 }
81 #endif
82
avfilter_graph_alloc(void)83 AVFilterGraph *avfilter_graph_alloc(void)
84 {
85 AVFilterGraph *ret = av_mallocz(sizeof(*ret));
86 if (!ret)
87 return NULL;
88
89 ret->internal = av_mallocz(sizeof(*ret->internal));
90 if (!ret->internal) {
91 av_freep(&ret);
92 return NULL;
93 }
94
95 ret->av_class = &filtergraph_class;
96 av_opt_set_defaults(ret);
97 ff_framequeue_global_init(&ret->internal->frame_queues);
98
99 return ret;
100 }
101
ff_filter_graph_remove_filter(AVFilterGraph * graph,AVFilterContext * filter)102 void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
103 {
104 int i, j;
105 for (i = 0; i < graph->nb_filters; i++) {
106 if (graph->filters[i] == filter) {
107 FFSWAP(AVFilterContext*, graph->filters[i],
108 graph->filters[graph->nb_filters - 1]);
109 graph->nb_filters--;
110 filter->graph = NULL;
111 for (j = 0; j<filter->nb_outputs; j++)
112 if (filter->outputs[j])
113 filter->outputs[j]->graph = NULL;
114
115 return;
116 }
117 }
118 }
119
avfilter_graph_free(AVFilterGraph ** graph)120 void avfilter_graph_free(AVFilterGraph **graph)
121 {
122 if (!*graph)
123 return;
124
125 while ((*graph)->nb_filters)
126 avfilter_free((*graph)->filters[0]);
127
128 ff_graph_thread_free(*graph);
129
130 av_freep(&(*graph)->sink_links);
131
132 av_freep(&(*graph)->scale_sws_opts);
133 av_freep(&(*graph)->aresample_swr_opts);
134 #if FF_API_LAVR_OPTS
135 av_freep(&(*graph)->resample_lavr_opts);
136 #endif
137 av_freep(&(*graph)->filters);
138 av_freep(&(*graph)->internal);
139 av_freep(graph);
140 }
141
avfilter_graph_create_filter(AVFilterContext ** filt_ctx,const AVFilter * filt,const char * name,const char * args,void * opaque,AVFilterGraph * graph_ctx)142 int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
143 const char *name, const char *args, void *opaque,
144 AVFilterGraph *graph_ctx)
145 {
146 int ret;
147
148 *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name);
149 if (!*filt_ctx)
150 return AVERROR(ENOMEM);
151
152 ret = avfilter_init_str(*filt_ctx, args);
153 if (ret < 0)
154 goto fail;
155
156 return 0;
157
158 fail:
159 if (*filt_ctx)
160 avfilter_free(*filt_ctx);
161 *filt_ctx = NULL;
162 return ret;
163 }
164
avfilter_graph_set_auto_convert(AVFilterGraph * graph,unsigned flags)165 void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
166 {
167 graph->disable_auto_convert = flags;
168 }
169
avfilter_graph_alloc_filter(AVFilterGraph * graph,const AVFilter * filter,const char * name)170 AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph,
171 const AVFilter *filter,
172 const char *name)
173 {
174 AVFilterContext **filters, *s;
175
176 if (graph->thread_type && !graph->internal->thread_execute) {
177 if (graph->execute) {
178 graph->internal->thread_execute = graph->execute;
179 } else {
180 int ret = ff_graph_thread_init(graph);
181 if (ret < 0) {
182 av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret));
183 return NULL;
184 }
185 }
186 }
187
188 s = ff_filter_alloc(filter, name);
189 if (!s)
190 return NULL;
191
192 filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1));
193 if (!filters) {
194 avfilter_free(s);
195 return NULL;
196 }
197
198 graph->filters = filters;
199 graph->filters[graph->nb_filters++] = s;
200
201 s->graph = graph;
202
203 return s;
204 }
205
206 /**
207 * Check for the validity of graph.
208 *
209 * A graph is considered valid if all its input and output pads are
210 * connected.
211 *
212 * @return >= 0 in case of success, a negative value otherwise
213 */
graph_check_validity(AVFilterGraph * graph,AVClass * log_ctx)214 static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
215 {
216 AVFilterContext *filt;
217 int i, j;
218
219 for (i = 0; i < graph->nb_filters; i++) {
220 const AVFilterPad *pad;
221 filt = graph->filters[i];
222
223 for (j = 0; j < filt->nb_inputs; j++) {
224 if (!filt->inputs[j] || !filt->inputs[j]->src) {
225 pad = &filt->input_pads[j];
226 av_log(log_ctx, AV_LOG_ERROR,
227 "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n",
228 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
229 return AVERROR(EINVAL);
230 }
231 }
232
233 for (j = 0; j < filt->nb_outputs; j++) {
234 if (!filt->outputs[j] || !filt->outputs[j]->dst) {
235 pad = &filt->output_pads[j];
236 av_log(log_ctx, AV_LOG_ERROR,
237 "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n",
238 pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name);
239 return AVERROR(EINVAL);
240 }
241 }
242 }
243
244 return 0;
245 }
246
247 /**
248 * Configure all the links of graphctx.
249 *
250 * @return >= 0 in case of success, a negative value otherwise
251 */
graph_config_links(AVFilterGraph * graph,AVClass * log_ctx)252 static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
253 {
254 AVFilterContext *filt;
255 int i, ret;
256
257 for (i = 0; i < graph->nb_filters; i++) {
258 filt = graph->filters[i];
259
260 if (!filt->nb_outputs) {
261 if ((ret = avfilter_config_links(filt)))
262 return ret;
263 }
264 }
265
266 return 0;
267 }
268
graph_check_links(AVFilterGraph * graph,AVClass * log_ctx)269 static int graph_check_links(AVFilterGraph *graph, AVClass *log_ctx)
270 {
271 AVFilterContext *f;
272 AVFilterLink *l;
273 unsigned i, j;
274 int ret;
275
276 for (i = 0; i < graph->nb_filters; i++) {
277 f = graph->filters[i];
278 for (j = 0; j < f->nb_outputs; j++) {
279 l = f->outputs[j];
280 if (l->type == AVMEDIA_TYPE_VIDEO) {
281 ret = av_image_check_size2(l->w, l->h, INT64_MAX, l->format, 0, f);
282 if (ret < 0)
283 return ret;
284 }
285 }
286 }
287 return 0;
288 }
289
avfilter_graph_get_filter(AVFilterGraph * graph,const char * name)290 AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name)
291 {
292 int i;
293
294 for (i = 0; i < graph->nb_filters; i++)
295 if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name))
296 return graph->filters[i];
297
298 return NULL;
299 }
300
sanitize_channel_layouts(void * log,AVFilterChannelLayouts * l)301 static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l)
302 {
303 if (!l)
304 return;
305 if (l->nb_channel_layouts) {
306 if (l->all_layouts || l->all_counts)
307 av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n");
308 l->all_layouts = l->all_counts = 0;
309 } else {
310 if (l->all_counts && !l->all_layouts)
311 av_log(log, AV_LOG_WARNING, "All counts without all layouts\n");
312 l->all_layouts = 1;
313 }
314 }
315
filter_query_formats(AVFilterContext * ctx)316 static int filter_query_formats(AVFilterContext *ctx)
317 {
318 int ret, i;
319 AVFilterFormats *formats;
320 AVFilterChannelLayouts *chlayouts;
321 AVFilterFormats *samplerates;
322 enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
323 ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
324 AVMEDIA_TYPE_VIDEO;
325
326 if ((ret = ctx->filter->query_formats(ctx)) < 0) {
327 if (ret != AVERROR(EAGAIN))
328 av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n",
329 ctx->name, av_err2str(ret));
330 return ret;
331 }
332
333 for (i = 0; i < ctx->nb_inputs; i++)
334 sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts);
335 for (i = 0; i < ctx->nb_outputs; i++)
336 sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts);
337
338 formats = ff_all_formats(type);
339 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
340 return ret;
341 if (type == AVMEDIA_TYPE_AUDIO) {
342 samplerates = ff_all_samplerates();
343 if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0)
344 return ret;
345 chlayouts = ff_all_channel_layouts();
346 if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0)
347 return ret;
348 }
349 return 0;
350 }
351
formats_declared(AVFilterContext * f)352 static int formats_declared(AVFilterContext *f)
353 {
354 int i;
355
356 for (i = 0; i < f->nb_inputs; i++) {
357 if (!f->inputs[i]->out_formats)
358 return 0;
359 if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
360 !(f->inputs[i]->out_samplerates &&
361 f->inputs[i]->out_channel_layouts))
362 return 0;
363 }
364 for (i = 0; i < f->nb_outputs; i++) {
365 if (!f->outputs[i]->in_formats)
366 return 0;
367 if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
368 !(f->outputs[i]->in_samplerates &&
369 f->outputs[i]->in_channel_layouts))
370 return 0;
371 }
372 return 1;
373 }
374
clone_filter_formats(AVFilterFormats * arg)375 static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg)
376 {
377 AVFilterFormats *a = av_memdup(arg, sizeof(*arg));
378 if (a) {
379 a->refcount = 0;
380 a->refs = NULL;
381 a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats);
382 if (!a->formats && arg->formats)
383 av_freep(&a);
384 }
385 return a;
386 }
387
can_merge_formats(AVFilterFormats * a_arg,AVFilterFormats * b_arg,enum AVMediaType type,int is_sample_rate)388 static int can_merge_formats(AVFilterFormats *a_arg,
389 AVFilterFormats *b_arg,
390 enum AVMediaType type,
391 int is_sample_rate)
392 {
393 AVFilterFormats *a, *b, *ret;
394 if (a_arg == b_arg)
395 return 1;
396 a = clone_filter_formats(a_arg);
397 b = clone_filter_formats(b_arg);
398
399 if (!a || !b) {
400 if (a)
401 av_freep(&a->formats);
402 if (b)
403 av_freep(&b->formats);
404
405 av_freep(&a);
406 av_freep(&b);
407
408 return 0;
409 }
410
411 if (is_sample_rate) {
412 ret = ff_merge_samplerates(a, b);
413 } else {
414 ret = ff_merge_formats(a, b, type);
415 }
416 if (ret) {
417 av_freep(&ret->formats);
418 av_freep(&ret->refs);
419 av_freep(&ret);
420 return 1;
421 } else {
422 if (a)
423 av_freep(&a->formats);
424 if (b)
425 av_freep(&b->formats);
426 av_freep(&a);
427 av_freep(&b);
428 return 0;
429 }
430 }
431
432 /**
433 * Perform one round of query_formats() and merging formats lists on the
434 * filter graph.
435 * @return >=0 if all links formats lists could be queried and merged;
436 * AVERROR(EAGAIN) some progress was made in the queries or merging
437 * and a later call may succeed;
438 * AVERROR(EIO) (may be changed) plus a log message if no progress
439 * was made and the negotiation is stuck;
440 * a negative error code if some other error happened
441 */
query_formats(AVFilterGraph * graph,AVClass * log_ctx)442 static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
443 {
444 int i, j, ret;
445 int scaler_count = 0, resampler_count = 0;
446 int count_queried = 0; /* successful calls to query_formats() */
447 int count_merged = 0; /* successful merge of formats lists */
448 int count_already_merged = 0; /* lists already merged */
449 int count_delayed = 0; /* lists that need to be merged later */
450
451 for (i = 0; i < graph->nb_filters; i++) {
452 AVFilterContext *f = graph->filters[i];
453 if (formats_declared(f))
454 continue;
455 if (f->filter->query_formats)
456 ret = filter_query_formats(f);
457 else
458 ret = ff_default_query_formats(f);
459 if (ret < 0 && ret != AVERROR(EAGAIN))
460 return ret;
461 /* note: EAGAIN could indicate a partial success, not counted yet */
462 count_queried += ret >= 0;
463 }
464
465 /* go through and merge as many format lists as possible */
466 for (i = 0; i < graph->nb_filters; i++) {
467 AVFilterContext *filter = graph->filters[i];
468
469 for (j = 0; j < filter->nb_inputs; j++) {
470 AVFilterLink *link = filter->inputs[j];
471 int convert_needed = 0;
472
473 if (!link)
474 continue;
475
476 if (link->in_formats != link->out_formats
477 && link->in_formats && link->out_formats)
478 if (!can_merge_formats(link->in_formats, link->out_formats,
479 link->type, 0))
480 convert_needed = 1;
481 if (link->type == AVMEDIA_TYPE_AUDIO) {
482 if (link->in_samplerates != link->out_samplerates
483 && link->in_samplerates && link->out_samplerates)
484 if (!can_merge_formats(link->in_samplerates,
485 link->out_samplerates,
486 0, 1))
487 convert_needed = 1;
488 }
489
490 #define MERGE_DISPATCH(field, statement) \
491 if (!(link->in_ ## field && link->out_ ## field)) { \
492 count_delayed++; \
493 } else if (link->in_ ## field == link->out_ ## field) { \
494 count_already_merged++; \
495 } else if (!convert_needed) { \
496 count_merged++; \
497 statement \
498 }
499
500 if (link->type == AVMEDIA_TYPE_AUDIO) {
501 MERGE_DISPATCH(channel_layouts,
502 if (!ff_merge_channel_layouts(link->in_channel_layouts,
503 link->out_channel_layouts))
504 convert_needed = 1;
505 )
506 MERGE_DISPATCH(samplerates,
507 if (!ff_merge_samplerates(link->in_samplerates,
508 link->out_samplerates))
509 convert_needed = 1;
510 )
511 }
512 MERGE_DISPATCH(formats,
513 if (!ff_merge_formats(link->in_formats, link->out_formats,
514 link->type))
515 convert_needed = 1;
516 )
517 #undef MERGE_DISPATCH
518
519 if (convert_needed) {
520 AVFilterContext *convert;
521 const AVFilter *filter;
522 AVFilterLink *inlink, *outlink;
523 char inst_name[30];
524
525 if (graph->disable_auto_convert) {
526 av_log(log_ctx, AV_LOG_ERROR,
527 "The filters '%s' and '%s' do not have a common format "
528 "and automatic conversion is disabled.\n",
529 link->src->name, link->dst->name);
530 return AVERROR(EINVAL);
531 }
532
533 /* couldn't merge format lists. auto-insert conversion filter */
534 switch (link->type) {
535 case AVMEDIA_TYPE_VIDEO:
536 if (!(filter = avfilter_get_by_name("scale"))) {
537 av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
538 "not present, cannot convert pixel formats.\n");
539 return AVERROR(EINVAL);
540 }
541
542 snprintf(inst_name, sizeof(inst_name), "auto_scaler_%d",
543 scaler_count++);
544
545 if ((ret = avfilter_graph_create_filter(&convert, filter,
546 inst_name, graph->scale_sws_opts, NULL,
547 graph)) < 0)
548 return ret;
549 break;
550 case AVMEDIA_TYPE_AUDIO:
551 if (!(filter = avfilter_get_by_name("aresample"))) {
552 av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter "
553 "not present, cannot convert audio formats.\n");
554 return AVERROR(EINVAL);
555 }
556
557 snprintf(inst_name, sizeof(inst_name), "auto_resampler_%d",
558 resampler_count++);
559 if ((ret = avfilter_graph_create_filter(&convert, filter,
560 inst_name, graph->aresample_swr_opts,
561 NULL, graph)) < 0)
562 return ret;
563 break;
564 default:
565 return AVERROR(EINVAL);
566 }
567
568 if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0)
569 return ret;
570
571 if ((ret = filter_query_formats(convert)) < 0)
572 return ret;
573
574 inlink = convert->inputs[0];
575 outlink = convert->outputs[0];
576 av_assert0( inlink-> in_formats->refcount > 0);
577 av_assert0( inlink->out_formats->refcount > 0);
578 av_assert0(outlink-> in_formats->refcount > 0);
579 av_assert0(outlink->out_formats->refcount > 0);
580 if (outlink->type == AVMEDIA_TYPE_AUDIO) {
581 av_assert0( inlink-> in_samplerates->refcount > 0);
582 av_assert0( inlink->out_samplerates->refcount > 0);
583 av_assert0(outlink-> in_samplerates->refcount > 0);
584 av_assert0(outlink->out_samplerates->refcount > 0);
585 av_assert0( inlink-> in_channel_layouts->refcount > 0);
586 av_assert0( inlink->out_channel_layouts->refcount > 0);
587 av_assert0(outlink-> in_channel_layouts->refcount > 0);
588 av_assert0(outlink->out_channel_layouts->refcount > 0);
589 }
590 if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) ||
591 !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type))
592 ret = AVERROR(ENOSYS);
593 if (inlink->type == AVMEDIA_TYPE_AUDIO &&
594 (!ff_merge_samplerates(inlink->in_samplerates,
595 inlink->out_samplerates) ||
596 !ff_merge_channel_layouts(inlink->in_channel_layouts,
597 inlink->out_channel_layouts)))
598 ret = AVERROR(ENOSYS);
599 if (outlink->type == AVMEDIA_TYPE_AUDIO &&
600 (!ff_merge_samplerates(outlink->in_samplerates,
601 outlink->out_samplerates) ||
602 !ff_merge_channel_layouts(outlink->in_channel_layouts,
603 outlink->out_channel_layouts)))
604 ret = AVERROR(ENOSYS);
605
606 if (ret < 0) {
607 av_log(log_ctx, AV_LOG_ERROR,
608 "Impossible to convert between the formats supported by the filter "
609 "'%s' and the filter '%s'\n", link->src->name, link->dst->name);
610 return ret;
611 }
612 }
613 }
614 }
615
616 av_log(graph, AV_LOG_DEBUG, "query_formats: "
617 "%d queried, %d merged, %d already done, %d delayed\n",
618 count_queried, count_merged, count_already_merged, count_delayed);
619 if (count_delayed) {
620 AVBPrint bp;
621
622 /* if count_queried > 0, one filter at least did set its formats,
623 that will give additional information to its neighbour;
624 if count_merged > 0, one pair of formats lists at least was merged,
625 that will give additional information to all connected filters;
626 in both cases, progress was made and a new round must be done */
627 if (count_queried || count_merged)
628 return AVERROR(EAGAIN);
629 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
630 for (i = 0; i < graph->nb_filters; i++)
631 if (!formats_declared(graph->filters[i]))
632 av_bprintf(&bp, "%s%s", bp.len ? ", " : "",
633 graph->filters[i]->name);
634 av_log(graph, AV_LOG_ERROR,
635 "The following filters could not choose their formats: %s\n"
636 "Consider inserting the (a)format filter near their input or "
637 "output.\n", bp.str);
638 return AVERROR(EIO);
639 }
640 return 0;
641 }
642
get_fmt_score(enum AVSampleFormat dst_fmt,enum AVSampleFormat src_fmt)643 static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt)
644 {
645 int score = 0;
646
647 if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt))
648 score ++;
649
650 if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) {
651 score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt));
652 }else
653 score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt));
654
655 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 &&
656 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT)
657 score += 20;
658
659 if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT &&
660 av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32)
661 score += 2;
662
663 return score;
664 }
665
find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1,enum AVSampleFormat dst_fmt2,enum AVSampleFormat src_fmt)666 static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2,
667 enum AVSampleFormat src_fmt)
668 {
669 int score1, score2;
670
671 score1 = get_fmt_score(dst_fmt1, src_fmt);
672 score2 = get_fmt_score(dst_fmt2, src_fmt);
673
674 return score1 < score2 ? dst_fmt1 : dst_fmt2;
675 }
676
pick_format(AVFilterLink * link,AVFilterLink * ref)677 static int pick_format(AVFilterLink *link, AVFilterLink *ref)
678 {
679 if (!link || !link->in_formats)
680 return 0;
681
682 if (link->type == AVMEDIA_TYPE_VIDEO) {
683 if(ref && ref->type == AVMEDIA_TYPE_VIDEO){
684 //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
685 int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0;
686 enum AVPixelFormat best= AV_PIX_FMT_NONE;
687 int i;
688 for (i=0; i<link->in_formats->nb_formats; i++) {
689 enum AVPixelFormat p = link->in_formats->formats[i];
690 best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL);
691 }
692 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n",
693 av_get_pix_fmt_name(best), link->in_formats->nb_formats,
694 av_get_pix_fmt_name(ref->format), has_alpha);
695 link->in_formats->formats[0] = best;
696 }
697 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
698 if(ref && ref->type == AVMEDIA_TYPE_AUDIO){
699 enum AVSampleFormat best= AV_SAMPLE_FMT_NONE;
700 int i;
701 for (i=0; i<link->in_formats->nb_formats; i++) {
702 enum AVSampleFormat p = link->in_formats->formats[i];
703 best = find_best_sample_fmt_of_2(best, p, ref->format);
704 }
705 av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n",
706 av_get_sample_fmt_name(best), link->in_formats->nb_formats,
707 av_get_sample_fmt_name(ref->format));
708 link->in_formats->formats[0] = best;
709 }
710 }
711
712 link->in_formats->nb_formats = 1;
713 link->format = link->in_formats->formats[0];
714
715 if (link->type == AVMEDIA_TYPE_AUDIO) {
716 if (!link->in_samplerates->nb_formats) {
717 av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for"
718 " the link between filters %s and %s.\n", link->src->name,
719 link->dst->name);
720 return AVERROR(EINVAL);
721 }
722 link->in_samplerates->nb_formats = 1;
723 link->sample_rate = link->in_samplerates->formats[0];
724
725 if (link->in_channel_layouts->all_layouts) {
726 av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
727 " the link between filters %s and %s.\n", link->src->name,
728 link->dst->name);
729 if (!link->in_channel_layouts->all_counts)
730 av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
731 "supported, try specifying a channel layout using "
732 "'aformat=channel_layouts=something'.\n");
733 return AVERROR(EINVAL);
734 }
735 link->in_channel_layouts->nb_channel_layouts = 1;
736 link->channel_layout = link->in_channel_layouts->channel_layouts[0];
737 if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout)))
738 link->channel_layout = 0;
739 else
740 link->channels = av_get_channel_layout_nb_channels(link->channel_layout);
741 }
742
743 ff_formats_unref(&link->in_formats);
744 ff_formats_unref(&link->out_formats);
745 ff_formats_unref(&link->in_samplerates);
746 ff_formats_unref(&link->out_samplerates);
747 ff_channel_layouts_unref(&link->in_channel_layouts);
748 ff_channel_layouts_unref(&link->out_channel_layouts);
749
750 return 0;
751 }
752
753 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format, unref_format) \
754 do { \
755 for (i = 0; i < filter->nb_inputs; i++) { \
756 AVFilterLink *link = filter->inputs[i]; \
757 fmt_type fmt; \
758 \
759 if (!link->out_ ## list || link->out_ ## list->nb != 1) \
760 continue; \
761 fmt = link->out_ ## list->var[0]; \
762 \
763 for (j = 0; j < filter->nb_outputs; j++) { \
764 AVFilterLink *out_link = filter->outputs[j]; \
765 list_type *fmts; \
766 \
767 if (link->type != out_link->type || \
768 out_link->in_ ## list->nb == 1) \
769 continue; \
770 fmts = out_link->in_ ## list; \
771 \
772 if (!out_link->in_ ## list->nb) { \
773 if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\
774 return ret; \
775 ret = 1; \
776 break; \
777 } \
778 \
779 for (k = 0; k < out_link->in_ ## list->nb; k++) \
780 if (fmts->var[k] == fmt) { \
781 fmts->var[0] = fmt; \
782 fmts->nb = 1; \
783 ret = 1; \
784 break; \
785 } \
786 } \
787 } \
788 } while (0)
789
reduce_formats_on_filter(AVFilterContext * filter)790 static int reduce_formats_on_filter(AVFilterContext *filter)
791 {
792 int i, j, k, ret = 0;
793
794 REDUCE_FORMATS(int, AVFilterFormats, formats, formats,
795 nb_formats, ff_add_format, ff_formats_unref);
796 REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats,
797 nb_formats, ff_add_format, ff_formats_unref);
798
799 /* reduce channel layouts */
800 for (i = 0; i < filter->nb_inputs; i++) {
801 AVFilterLink *inlink = filter->inputs[i];
802 uint64_t fmt;
803
804 if (!inlink->out_channel_layouts ||
805 inlink->out_channel_layouts->nb_channel_layouts != 1)
806 continue;
807 fmt = inlink->out_channel_layouts->channel_layouts[0];
808
809 for (j = 0; j < filter->nb_outputs; j++) {
810 AVFilterLink *outlink = filter->outputs[j];
811 AVFilterChannelLayouts *fmts;
812
813 fmts = outlink->in_channel_layouts;
814 if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1)
815 continue;
816
817 if (fmts->all_layouts &&
818 (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) {
819 /* Turn the infinite list into a singleton */
820 fmts->all_layouts = fmts->all_counts = 0;
821 if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0)
822 ret = 1;
823 break;
824 }
825
826 for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) {
827 if (fmts->channel_layouts[k] == fmt) {
828 fmts->channel_layouts[0] = fmt;
829 fmts->nb_channel_layouts = 1;
830 ret = 1;
831 break;
832 }
833 }
834 }
835 }
836
837 return ret;
838 }
839
reduce_formats(AVFilterGraph * graph)840 static int reduce_formats(AVFilterGraph *graph)
841 {
842 int i, reduced, ret;
843
844 do {
845 reduced = 0;
846
847 for (i = 0; i < graph->nb_filters; i++) {
848 if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0)
849 return ret;
850 reduced |= ret;
851 }
852 } while (reduced);
853
854 return 0;
855 }
856
swap_samplerates_on_filter(AVFilterContext * filter)857 static void swap_samplerates_on_filter(AVFilterContext *filter)
858 {
859 AVFilterLink *link = NULL;
860 int sample_rate;
861 int i, j;
862
863 for (i = 0; i < filter->nb_inputs; i++) {
864 link = filter->inputs[i];
865
866 if (link->type == AVMEDIA_TYPE_AUDIO &&
867 link->out_samplerates->nb_formats== 1)
868 break;
869 }
870 if (i == filter->nb_inputs)
871 return;
872
873 sample_rate = link->out_samplerates->formats[0];
874
875 for (i = 0; i < filter->nb_outputs; i++) {
876 AVFilterLink *outlink = filter->outputs[i];
877 int best_idx, best_diff = INT_MAX;
878
879 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
880 outlink->in_samplerates->nb_formats < 2)
881 continue;
882
883 for (j = 0; j < outlink->in_samplerates->nb_formats; j++) {
884 int diff = abs(sample_rate - outlink->in_samplerates->formats[j]);
885
886 av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates
887
888 if (diff < best_diff) {
889 best_diff = diff;
890 best_idx = j;
891 }
892 }
893 FFSWAP(int, outlink->in_samplerates->formats[0],
894 outlink->in_samplerates->formats[best_idx]);
895 }
896 }
897
swap_samplerates(AVFilterGraph * graph)898 static void swap_samplerates(AVFilterGraph *graph)
899 {
900 int i;
901
902 for (i = 0; i < graph->nb_filters; i++)
903 swap_samplerates_on_filter(graph->filters[i]);
904 }
905
906 #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
907 #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
908 #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
909 #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)
910 #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
911 #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)
912 #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
913
914 /* allowable substitutions for channel pairs when comparing layouts,
915 * ordered by priority for both values */
916 static const uint64_t ch_subst[][2] = {
917 { CH_FRONT_PAIR, CH_CENTER_PAIR },
918 { CH_FRONT_PAIR, CH_WIDE_PAIR },
919 { CH_FRONT_PAIR, AV_CH_FRONT_CENTER },
920 { CH_CENTER_PAIR, CH_FRONT_PAIR },
921 { CH_CENTER_PAIR, CH_WIDE_PAIR },
922 { CH_CENTER_PAIR, AV_CH_FRONT_CENTER },
923 { CH_WIDE_PAIR, CH_FRONT_PAIR },
924 { CH_WIDE_PAIR, CH_CENTER_PAIR },
925 { CH_WIDE_PAIR, AV_CH_FRONT_CENTER },
926 { AV_CH_FRONT_CENTER, CH_FRONT_PAIR },
927 { AV_CH_FRONT_CENTER, CH_CENTER_PAIR },
928 { AV_CH_FRONT_CENTER, CH_WIDE_PAIR },
929 { CH_SIDE_PAIR, CH_DIRECT_PAIR },
930 { CH_SIDE_PAIR, CH_BACK_PAIR },
931 { CH_SIDE_PAIR, AV_CH_BACK_CENTER },
932 { CH_BACK_PAIR, CH_DIRECT_PAIR },
933 { CH_BACK_PAIR, CH_SIDE_PAIR },
934 { CH_BACK_PAIR, AV_CH_BACK_CENTER },
935 { AV_CH_BACK_CENTER, CH_BACK_PAIR },
936 { AV_CH_BACK_CENTER, CH_DIRECT_PAIR },
937 { AV_CH_BACK_CENTER, CH_SIDE_PAIR },
938 };
939
swap_channel_layouts_on_filter(AVFilterContext * filter)940 static void swap_channel_layouts_on_filter(AVFilterContext *filter)
941 {
942 AVFilterLink *link = NULL;
943 int i, j, k;
944
945 for (i = 0; i < filter->nb_inputs; i++) {
946 link = filter->inputs[i];
947
948 if (link->type == AVMEDIA_TYPE_AUDIO &&
949 link->out_channel_layouts->nb_channel_layouts == 1)
950 break;
951 }
952 if (i == filter->nb_inputs)
953 return;
954
955 for (i = 0; i < filter->nb_outputs; i++) {
956 AVFilterLink *outlink = filter->outputs[i];
957 int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX;
958
959 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
960 outlink->in_channel_layouts->nb_channel_layouts < 2)
961 continue;
962
963 for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) {
964 uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0];
965 uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j];
966 int in_channels = av_get_channel_layout_nb_channels(in_chlayout);
967 int out_channels = av_get_channel_layout_nb_channels(out_chlayout);
968 int count_diff = out_channels - in_channels;
969 int matched_channels, extra_channels;
970 int score = 100000;
971
972 if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) {
973 /* Compute score in case the input or output layout encodes
974 a channel count; in this case the score is not altered by
975 the computation afterwards, as in_chlayout and
976 out_chlayout have both been set to 0 */
977 if (FF_LAYOUT2COUNT(in_chlayout))
978 in_channels = FF_LAYOUT2COUNT(in_chlayout);
979 if (FF_LAYOUT2COUNT(out_chlayout))
980 out_channels = FF_LAYOUT2COUNT(out_chlayout);
981 score -= 10000 + FFABS(out_channels - in_channels) +
982 (in_channels > out_channels ? 10000 : 0);
983 in_chlayout = out_chlayout = 0;
984 /* Let the remaining computation run, even if the score
985 value is not altered */
986 }
987
988 /* channel substitution */
989 for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) {
990 uint64_t cmp0 = ch_subst[k][0];
991 uint64_t cmp1 = ch_subst[k][1];
992 if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) &&
993 (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) {
994 in_chlayout &= ~cmp0;
995 out_chlayout &= ~cmp1;
996 /* add score for channel match, minus a deduction for
997 having to do the substitution */
998 score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2;
999 }
1000 }
1001
1002 /* no penalty for LFE channel mismatch */
1003 if ( (in_chlayout & AV_CH_LOW_FREQUENCY) &&
1004 (out_chlayout & AV_CH_LOW_FREQUENCY))
1005 score += 10;
1006 in_chlayout &= ~AV_CH_LOW_FREQUENCY;
1007 out_chlayout &= ~AV_CH_LOW_FREQUENCY;
1008
1009 matched_channels = av_get_channel_layout_nb_channels(in_chlayout &
1010 out_chlayout);
1011 extra_channels = av_get_channel_layout_nb_channels(out_chlayout &
1012 (~in_chlayout));
1013 score += 10 * matched_channels - 5 * extra_channels;
1014
1015 if (score > best_score ||
1016 (count_diff < best_count_diff && score == best_score)) {
1017 best_score = score;
1018 best_idx = j;
1019 best_count_diff = count_diff;
1020 }
1021 }
1022 av_assert0(best_idx >= 0);
1023 FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0],
1024 outlink->in_channel_layouts->channel_layouts[best_idx]);
1025 }
1026
1027 }
1028
swap_channel_layouts(AVFilterGraph * graph)1029 static void swap_channel_layouts(AVFilterGraph *graph)
1030 {
1031 int i;
1032
1033 for (i = 0; i < graph->nb_filters; i++)
1034 swap_channel_layouts_on_filter(graph->filters[i]);
1035 }
1036
swap_sample_fmts_on_filter(AVFilterContext * filter)1037 static void swap_sample_fmts_on_filter(AVFilterContext *filter)
1038 {
1039 AVFilterLink *link = NULL;
1040 int format, bps;
1041 int i, j;
1042
1043 for (i = 0; i < filter->nb_inputs; i++) {
1044 link = filter->inputs[i];
1045
1046 if (link->type == AVMEDIA_TYPE_AUDIO &&
1047 link->out_formats->nb_formats == 1)
1048 break;
1049 }
1050 if (i == filter->nb_inputs)
1051 return;
1052
1053 format = link->out_formats->formats[0];
1054 bps = av_get_bytes_per_sample(format);
1055
1056 for (i = 0; i < filter->nb_outputs; i++) {
1057 AVFilterLink *outlink = filter->outputs[i];
1058 int best_idx = -1, best_score = INT_MIN;
1059
1060 if (outlink->type != AVMEDIA_TYPE_AUDIO ||
1061 outlink->in_formats->nb_formats < 2)
1062 continue;
1063
1064 for (j = 0; j < outlink->in_formats->nb_formats; j++) {
1065 int out_format = outlink->in_formats->formats[j];
1066 int out_bps = av_get_bytes_per_sample(out_format);
1067 int score;
1068
1069 if (av_get_packed_sample_fmt(out_format) == format ||
1070 av_get_planar_sample_fmt(out_format) == format) {
1071 best_idx = j;
1072 break;
1073 }
1074
1075 /* for s32 and float prefer double to prevent loss of information */
1076 if (bps == 4 && out_bps == 8) {
1077 best_idx = j;
1078 break;
1079 }
1080
1081 /* prefer closest higher or equal bps */
1082 score = -abs(out_bps - bps);
1083 if (out_bps >= bps)
1084 score += INT_MAX/2;
1085
1086 if (score > best_score) {
1087 best_score = score;
1088 best_idx = j;
1089 }
1090 }
1091 av_assert0(best_idx >= 0);
1092 FFSWAP(int, outlink->in_formats->formats[0],
1093 outlink->in_formats->formats[best_idx]);
1094 }
1095 }
1096
swap_sample_fmts(AVFilterGraph * graph)1097 static void swap_sample_fmts(AVFilterGraph *graph)
1098 {
1099 int i;
1100
1101 for (i = 0; i < graph->nb_filters; i++)
1102 swap_sample_fmts_on_filter(graph->filters[i]);
1103
1104 }
1105
pick_formats(AVFilterGraph * graph)1106 static int pick_formats(AVFilterGraph *graph)
1107 {
1108 int i, j, ret;
1109 int change;
1110
1111 do{
1112 change = 0;
1113 for (i = 0; i < graph->nb_filters; i++) {
1114 AVFilterContext *filter = graph->filters[i];
1115 if (filter->nb_inputs){
1116 for (j = 0; j < filter->nb_inputs; j++){
1117 if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->nb_formats == 1) {
1118 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1119 return ret;
1120 change = 1;
1121 }
1122 }
1123 }
1124 if (filter->nb_outputs){
1125 for (j = 0; j < filter->nb_outputs; j++){
1126 if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->nb_formats == 1) {
1127 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1128 return ret;
1129 change = 1;
1130 }
1131 }
1132 }
1133 if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
1134 for (j = 0; j < filter->nb_outputs; j++) {
1135 if(filter->outputs[j]->format<0) {
1136 if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0)
1137 return ret;
1138 change = 1;
1139 }
1140 }
1141 }
1142 }
1143 }while(change);
1144
1145 for (i = 0; i < graph->nb_filters; i++) {
1146 AVFilterContext *filter = graph->filters[i];
1147
1148 for (j = 0; j < filter->nb_inputs; j++)
1149 if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
1150 return ret;
1151 for (j = 0; j < filter->nb_outputs; j++)
1152 if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
1153 return ret;
1154 }
1155 return 0;
1156 }
1157
1158 /**
1159 * Configure the formats of all the links in the graph.
1160 */
graph_config_formats(AVFilterGraph * graph,AVClass * log_ctx)1161 static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx)
1162 {
1163 int ret;
1164
1165 /* find supported formats from sub-filters, and merge along links */
1166 while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN))
1167 av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n");
1168 if (ret < 0)
1169 return ret;
1170
1171 /* Once everything is merged, it's possible that we'll still have
1172 * multiple valid media format choices. We try to minimize the amount
1173 * of format conversion inside filters */
1174 if ((ret = reduce_formats(graph)) < 0)
1175 return ret;
1176
1177 /* for audio filters, ensure the best format, sample rate and channel layout
1178 * is selected */
1179 swap_sample_fmts(graph);
1180 swap_samplerates(graph);
1181 swap_channel_layouts(graph);
1182
1183 if ((ret = pick_formats(graph)) < 0)
1184 return ret;
1185
1186 return 0;
1187 }
1188
graph_config_pointers(AVFilterGraph * graph,AVClass * log_ctx)1189 static int graph_config_pointers(AVFilterGraph *graph,
1190 AVClass *log_ctx)
1191 {
1192 unsigned i, j;
1193 int sink_links_count = 0, n = 0;
1194 AVFilterContext *f;
1195 AVFilterLink **sinks;
1196
1197 for (i = 0; i < graph->nb_filters; i++) {
1198 f = graph->filters[i];
1199 for (j = 0; j < f->nb_inputs; j++) {
1200 f->inputs[j]->graph = graph;
1201 f->inputs[j]->age_index = -1;
1202 }
1203 for (j = 0; j < f->nb_outputs; j++) {
1204 f->outputs[j]->graph = graph;
1205 f->outputs[j]->age_index= -1;
1206 }
1207 if (!f->nb_outputs) {
1208 if (f->nb_inputs > INT_MAX - sink_links_count)
1209 return AVERROR(EINVAL);
1210 sink_links_count += f->nb_inputs;
1211 }
1212 }
1213 sinks = av_calloc(sink_links_count, sizeof(*sinks));
1214 if (!sinks)
1215 return AVERROR(ENOMEM);
1216 for (i = 0; i < graph->nb_filters; i++) {
1217 f = graph->filters[i];
1218 if (!f->nb_outputs) {
1219 for (j = 0; j < f->nb_inputs; j++) {
1220 sinks[n] = f->inputs[j];
1221 f->inputs[j]->age_index = n++;
1222 }
1223 }
1224 }
1225 av_assert0(n == sink_links_count);
1226 graph->sink_links = sinks;
1227 graph->sink_links_count = sink_links_count;
1228 return 0;
1229 }
1230
graph_insert_fifos(AVFilterGraph * graph,AVClass * log_ctx)1231 static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
1232 {
1233 AVFilterContext *f;
1234 int i, j, ret;
1235 int fifo_count = 0;
1236
1237 for (i = 0; i < graph->nb_filters; i++) {
1238 f = graph->filters[i];
1239
1240 for (j = 0; j < f->nb_inputs; j++) {
1241 AVFilterLink *link = f->inputs[j];
1242 AVFilterContext *fifo_ctx;
1243 const AVFilter *fifo;
1244 char name[32];
1245
1246 if (!link->dstpad->needs_fifo)
1247 continue;
1248
1249 fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ?
1250 avfilter_get_by_name("fifo") :
1251 avfilter_get_by_name("afifo");
1252
1253 snprintf(name, sizeof(name), "auto_fifo_%d", fifo_count++);
1254
1255 ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL,
1256 NULL, graph);
1257 if (ret < 0)
1258 return ret;
1259
1260 ret = avfilter_insert_filter(link, fifo_ctx, 0, 0);
1261 if (ret < 0)
1262 return ret;
1263 }
1264 }
1265
1266 return 0;
1267 }
1268
avfilter_graph_config(AVFilterGraph * graphctx,void * log_ctx)1269 int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
1270 {
1271 int ret;
1272
1273 if ((ret = graph_check_validity(graphctx, log_ctx)))
1274 return ret;
1275 if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0)
1276 return ret;
1277 if ((ret = graph_config_formats(graphctx, log_ctx)))
1278 return ret;
1279 if ((ret = graph_config_links(graphctx, log_ctx)))
1280 return ret;
1281 if ((ret = graph_check_links(graphctx, log_ctx)))
1282 return ret;
1283 if ((ret = graph_config_pointers(graphctx, log_ctx)))
1284 return ret;
1285
1286 return 0;
1287 }
1288
avfilter_graph_send_command(AVFilterGraph * graph,const char * target,const char * cmd,const char * arg,char * res,int res_len,int flags)1289 int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
1290 {
1291 int i, r = AVERROR(ENOSYS);
1292
1293 if (!graph)
1294 return r;
1295
1296 if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
1297 r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
1298 if (r != AVERROR(ENOSYS))
1299 return r;
1300 }
1301
1302 if (res_len && res)
1303 res[0] = 0;
1304
1305 for (i = 0; i < graph->nb_filters; i++) {
1306 AVFilterContext *filter = graph->filters[i];
1307 if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) {
1308 r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
1309 if (r != AVERROR(ENOSYS)) {
1310 if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0)
1311 return r;
1312 }
1313 }
1314 }
1315
1316 return r;
1317 }
1318
avfilter_graph_queue_command(AVFilterGraph * graph,const char * target,const char * command,const char * arg,int flags,double ts)1319 int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts)
1320 {
1321 int i;
1322
1323 if(!graph)
1324 return 0;
1325
1326 for (i = 0; i < graph->nb_filters; i++) {
1327 AVFilterContext *filter = graph->filters[i];
1328 if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){
1329 AVFilterCommand **queue = &filter->command_queue, *next;
1330 while (*queue && (*queue)->time <= ts)
1331 queue = &(*queue)->next;
1332 next = *queue;
1333 *queue = av_mallocz(sizeof(AVFilterCommand));
1334 if (!*queue)
1335 return AVERROR(ENOMEM);
1336
1337 (*queue)->command = av_strdup(command);
1338 (*queue)->arg = av_strdup(arg);
1339 (*queue)->time = ts;
1340 (*queue)->flags = flags;
1341 (*queue)->next = next;
1342 if(flags & AVFILTER_CMD_FLAG_ONE)
1343 return 0;
1344 }
1345 }
1346
1347 return 0;
1348 }
1349
heap_bubble_up(AVFilterGraph * graph,AVFilterLink * link,int index)1350 static void heap_bubble_up(AVFilterGraph *graph,
1351 AVFilterLink *link, int index)
1352 {
1353 AVFilterLink **links = graph->sink_links;
1354
1355 av_assert0(index >= 0);
1356
1357 while (index) {
1358 int parent = (index - 1) >> 1;
1359 if (links[parent]->current_pts_us >= link->current_pts_us)
1360 break;
1361 links[index] = links[parent];
1362 links[index]->age_index = index;
1363 index = parent;
1364 }
1365 links[index] = link;
1366 link->age_index = index;
1367 }
1368
heap_bubble_down(AVFilterGraph * graph,AVFilterLink * link,int index)1369 static void heap_bubble_down(AVFilterGraph *graph,
1370 AVFilterLink *link, int index)
1371 {
1372 AVFilterLink **links = graph->sink_links;
1373
1374 av_assert0(index >= 0);
1375
1376 while (1) {
1377 int child = 2 * index + 1;
1378 if (child >= graph->sink_links_count)
1379 break;
1380 if (child + 1 < graph->sink_links_count &&
1381 links[child + 1]->current_pts_us < links[child]->current_pts_us)
1382 child++;
1383 if (link->current_pts_us < links[child]->current_pts_us)
1384 break;
1385 links[index] = links[child];
1386 links[index]->age_index = index;
1387 index = child;
1388 }
1389 links[index] = link;
1390 link->age_index = index;
1391 }
1392
ff_avfilter_graph_update_heap(AVFilterGraph * graph,AVFilterLink * link)1393 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
1394 {
1395 heap_bubble_up (graph, link, link->age_index);
1396 heap_bubble_down(graph, link, link->age_index);
1397 }
1398
avfilter_graph_request_oldest(AVFilterGraph * graph)1399 int avfilter_graph_request_oldest(AVFilterGraph *graph)
1400 {
1401 AVFilterLink *oldest = graph->sink_links[0];
1402 int64_t frame_count;
1403 int r;
1404
1405 while (graph->sink_links_count) {
1406 oldest = graph->sink_links[0];
1407 if (oldest->dst->filter->activate) {
1408 /* For now, buffersink is the only filter implementing activate. */
1409 r = av_buffersink_get_frame_flags(oldest->dst, NULL,
1410 AV_BUFFERSINK_FLAG_PEEK);
1411 if (r != AVERROR_EOF)
1412 return r;
1413 } else {
1414 r = ff_request_frame(oldest);
1415 }
1416 if (r != AVERROR_EOF)
1417 break;
1418 av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n",
1419 oldest->dst ? oldest->dst->name : "unknown",
1420 oldest->dstpad ? oldest->dstpad->name : "unknown");
1421 /* EOF: remove the link from the heap */
1422 if (oldest->age_index < --graph->sink_links_count)
1423 heap_bubble_down(graph, graph->sink_links[graph->sink_links_count],
1424 oldest->age_index);
1425 oldest->age_index = -1;
1426 }
1427 if (!graph->sink_links_count)
1428 return AVERROR_EOF;
1429 av_assert1(!oldest->dst->filter->activate);
1430 av_assert1(oldest->age_index >= 0);
1431 frame_count = oldest->frame_count_out;
1432 while (frame_count == oldest->frame_count_out) {
1433 r = ff_filter_graph_run_once(graph);
1434 if (r == AVERROR(EAGAIN) &&
1435 !oldest->frame_wanted_out && !oldest->frame_blocked_in &&
1436 !oldest->status_in)
1437 ff_request_frame(oldest);
1438 else if (r < 0)
1439 return r;
1440 }
1441 return 0;
1442 }
1443
ff_filter_graph_run_once(AVFilterGraph * graph)1444 int ff_filter_graph_run_once(AVFilterGraph *graph)
1445 {
1446 AVFilterContext *filter;
1447 unsigned i;
1448
1449 av_assert0(graph->nb_filters);
1450 filter = graph->filters[0];
1451 for (i = 1; i < graph->nb_filters; i++)
1452 if (graph->filters[i]->ready > filter->ready)
1453 filter = graph->filters[i];
1454 if (!filter->ready)
1455 return AVERROR(EAGAIN);
1456 return ff_filter_activate(filter);
1457 }
1458