lavfi: add a frame_rate field to AVFilterLink.
[libav.git] / libavfilter / avfilter.c
1 /*
2 * filter layer
3 * Copyright (c) 2007 Bobby Bingham
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/common.h"
25 #include "libavutil/imgutils.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/rational.h"
30 #include "libavutil/samplefmt.h"
31
32 #include "audio.h"
33 #include "avfilter.h"
34 #include "formats.h"
35 #include "internal.h"
36 #include "video.h"
37
38 unsigned avfilter_version(void)
39 {
40 return LIBAVFILTER_VERSION_INT;
41 }
42
43 const char *avfilter_configuration(void)
44 {
45 return LIBAV_CONFIGURATION;
46 }
47
48 const char *avfilter_license(void)
49 {
50 #define LICENSE_PREFIX "libavfilter license: "
51 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
52 }
53
54 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
55 AVFilterPad **pads, AVFilterLink ***links,
56 AVFilterPad *newpad)
57 {
58 unsigned i;
59
60 idx = FFMIN(idx, *count);
61
62 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
63 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
64 memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
65 memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
66 memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
67 (*links)[idx] = NULL;
68
69 (*count)++;
70 for (i = idx + 1; i < *count; i++)
71 if (*links[i])
72 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
73 }
74
75 int avfilter_link(AVFilterContext *src, unsigned srcpad,
76 AVFilterContext *dst, unsigned dstpad)
77 {
78 AVFilterLink *link;
79
80 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
81 src->outputs[srcpad] || dst->inputs[dstpad])
82 return AVERROR(EINVAL);
83
84 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
85 av_log(src, AV_LOG_ERROR,
86 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
87 src->name, srcpad, dst->name, dstpad);
88 return AVERROR(EINVAL);
89 }
90
91 link = av_mallocz(sizeof(*link));
92 if (!link)
93 return AVERROR(ENOMEM);
94
95 src->outputs[srcpad] = dst->inputs[dstpad] = link;
96
97 link->src = src;
98 link->dst = dst;
99 link->srcpad = &src->output_pads[srcpad];
100 link->dstpad = &dst->input_pads[dstpad];
101 link->type = src->output_pads[srcpad].type;
102 assert(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
103 link->format = -1;
104
105 return 0;
106 }
107
108 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
109 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
110 {
111 int ret;
112 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
113
114 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
115 "between the filter '%s' and the filter '%s'\n",
116 filt->name, link->src->name, link->dst->name);
117
118 link->dst->inputs[dstpad_idx] = NULL;
119 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
120 /* failed to link output filter to new filter */
121 link->dst->inputs[dstpad_idx] = link;
122 return ret;
123 }
124
125 /* re-hookup the link to the new destination filter we inserted */
126 link->dst = filt;
127 link->dstpad = &filt->input_pads[filt_srcpad_idx];
128 filt->inputs[filt_srcpad_idx] = link;
129
130 /* if any information on supported media formats already exists on the
131 * link, we need to preserve that */
132 if (link->out_formats)
133 ff_formats_changeref(&link->out_formats,
134 &filt->outputs[filt_dstpad_idx]->out_formats);
135 if (link->out_samplerates)
136 ff_formats_changeref(&link->out_samplerates,
137 &filt->outputs[filt_dstpad_idx]->out_samplerates);
138 if (link->out_channel_layouts)
139 ff_channel_layouts_changeref(&link->out_channel_layouts,
140 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
141
142 return 0;
143 }
144
145 int avfilter_config_links(AVFilterContext *filter)
146 {
147 int (*config_link)(AVFilterLink *);
148 unsigned i;
149 int ret;
150
151 for (i = 0; i < filter->nb_inputs; i ++) {
152 AVFilterLink *link = filter->inputs[i];
153
154 if (!link) continue;
155 if (!link->src || !link->dst) {
156 av_log(filter, AV_LOG_ERROR,
157 "Not all input and output are properly linked (%d).\n", i);
158 return AVERROR(EINVAL);
159 }
160
161 switch (link->init_state) {
162 case AVLINK_INIT:
163 continue;
164 case AVLINK_STARTINIT:
165 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
166 return 0;
167 case AVLINK_UNINIT:
168 link->init_state = AVLINK_STARTINIT;
169
170 if ((ret = avfilter_config_links(link->src)) < 0)
171 return ret;
172
173 if (!(config_link = link->srcpad->config_props)) {
174 if (link->src->nb_inputs != 1) {
175 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
176 "with more than one input "
177 "must set config_props() "
178 "callbacks on all outputs\n");
179 return AVERROR(EINVAL);
180 }
181 } else if ((ret = config_link(link)) < 0) {
182 av_log(link->src, AV_LOG_ERROR,
183 "Failed to configure output pad on %s\n",
184 link->src->name);
185 return ret;
186 }
187
188 if (link->time_base.num == 0 && link->time_base.den == 0)
189 link->time_base = link->src->nb_inputs ?
190 link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
191
192 if (link->type == AVMEDIA_TYPE_VIDEO) {
193 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
194 link->sample_aspect_ratio = link->src->nb_inputs ?
195 link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
196
197 if (link->src->nb_inputs) {
198 if (!link->frame_rate.num && !link->frame_rate.den)
199 link->frame_rate = link->src->inputs[0]->frame_rate;
200 if (!link->w)
201 link->w = link->src->inputs[0]->w;
202 if (!link->h)
203 link->h = link->src->inputs[0]->h;
204 } else if (!link->w || !link->h) {
205 av_log(link->src, AV_LOG_ERROR,
206 "Video source filters must set their output link's "
207 "width and height\n");
208 return AVERROR(EINVAL);
209 }
210 }
211
212 if ((config_link = link->dstpad->config_props))
213 if ((ret = config_link(link)) < 0) {
214 av_log(link->dst, AV_LOG_ERROR,
215 "Failed to configure input pad on %s\n",
216 link->dst->name);
217 return ret;
218 }
219
220 link->init_state = AVLINK_INIT;
221 }
222 }
223
224 return 0;
225 }
226
227 void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
228 {
229 if (link->type == AVMEDIA_TYPE_VIDEO) {
230 av_log(ctx, AV_LOG_TRACE,
231 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
232 link, link->w, link->h,
233 av_get_pix_fmt_name(link->format),
234 link->src ? link->src->filter->name : "",
235 link->dst ? link->dst->filter->name : "",
236 end ? "\n" : "");
237 } else {
238 char buf[128];
239 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
240
241 av_log(ctx, AV_LOG_TRACE,
242 "link[%p r:%d cl:%s fmt:%-16s %-16s->%-16s]%s",
243 link, link->sample_rate, buf,
244 av_get_sample_fmt_name(link->format),
245 link->src ? link->src->filter->name : "",
246 link->dst ? link->dst->filter->name : "",
247 end ? "\n" : "");
248 }
249 }
250
251 int ff_request_frame(AVFilterLink *link)
252 {
253 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
254
255 if (link->srcpad->request_frame)
256 return link->srcpad->request_frame(link);
257 else if (link->src->inputs[0])
258 return ff_request_frame(link->src->inputs[0]);
259 else
260 return AVERROR(EINVAL);
261 }
262
263 int ff_poll_frame(AVFilterLink *link)
264 {
265 int i, min = INT_MAX;
266
267 if (link->srcpad->poll_frame)
268 return link->srcpad->poll_frame(link);
269
270 for (i = 0; i < link->src->nb_inputs; i++) {
271 int val;
272 if (!link->src->inputs[i])
273 return AVERROR(EINVAL);
274 val = ff_poll_frame(link->src->inputs[i]);
275 min = FFMIN(min, val);
276 }
277
278 return min;
279 }
280
281 static AVFilter *first_filter;
282
283 #if !FF_API_NOCONST_GET_NAME
284 const
285 #endif
286 AVFilter *avfilter_get_by_name(const char *name)
287 {
288 const AVFilter *f = NULL;
289
290 if (!name)
291 return NULL;
292
293 while ((f = avfilter_next(f)))
294 if (!strcmp(f->name, name))
295 return f;
296
297 return NULL;
298 }
299
300 int avfilter_register(AVFilter *filter)
301 {
302 AVFilter **f = &first_filter;
303 while (*f)
304 f = &(*f)->next;
305 *f = filter;
306 filter->next = NULL;
307 return 0;
308 }
309
310 const AVFilter *avfilter_next(const AVFilter *prev)
311 {
312 return prev ? prev->next : first_filter;
313 }
314
315 #if FF_API_OLD_FILTER_REGISTER
316 AVFilter **av_filter_next(AVFilter **filter)
317 {
318 return filter ? &(*filter)->next : &first_filter;
319 }
320
321 void avfilter_uninit(void)
322 {
323 }
324 #endif
325
326 int avfilter_pad_count(const AVFilterPad *pads)
327 {
328 int count;
329
330 if (!pads)
331 return 0;
332
333 for (count = 0; pads->name; count++)
334 pads++;
335 return count;
336 }
337
338 static const char *filter_name(void *p)
339 {
340 AVFilterContext *filter = p;
341 return filter->filter->name;
342 }
343
344 static void *filter_child_next(void *obj, void *prev)
345 {
346 AVFilterContext *ctx = obj;
347 if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
348 return ctx->priv;
349 return NULL;
350 }
351
352 static const AVClass *filter_child_class_next(const AVClass *prev)
353 {
354 const AVFilter *f = NULL;
355
356 while (prev && (f = avfilter_next(f)))
357 if (f->priv_class == prev)
358 break;
359
360 while ((f = avfilter_next(f)))
361 if (f->priv_class)
362 return f->priv_class;
363
364 return NULL;
365 }
366
367 #define OFFSET(x) offsetof(AVFilterContext, x)
368 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
369 static const AVOption avfilter_options[] = {
370 { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
371 { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
372 { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
373 { NULL },
374 };
375
376 static const AVClass avfilter_class = {
377 .class_name = "AVFilter",
378 .item_name = filter_name,
379 .version = LIBAVUTIL_VERSION_INT,
380 .child_next = filter_child_next,
381 .child_class_next = filter_child_class_next,
382 .option = avfilter_options,
383 };
384
385 static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
386 int *ret, int nb_jobs)
387 {
388 int i;
389
390 for (i = 0; i < nb_jobs; i++) {
391 int r = func(ctx, arg, i, nb_jobs);
392 if (ret)
393 ret[i] = r;
394 }
395 return 0;
396 }
397
398 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
399 {
400 AVFilterContext *ret;
401
402 if (!filter)
403 return NULL;
404
405 ret = av_mallocz(sizeof(AVFilterContext));
406 if (!ret)
407 return NULL;
408
409 ret->av_class = &avfilter_class;
410 ret->filter = filter;
411 ret->name = inst_name ? av_strdup(inst_name) : NULL;
412 if (filter->priv_size) {
413 ret->priv = av_mallocz(filter->priv_size);
414 if (!ret->priv)
415 goto err;
416 }
417
418 av_opt_set_defaults(ret);
419 if (filter->priv_class) {
420 *(const AVClass**)ret->priv = filter->priv_class;
421 av_opt_set_defaults(ret->priv);
422 }
423
424 ret->internal = av_mallocz(sizeof(*ret->internal));
425 if (!ret->internal)
426 goto err;
427 ret->internal->execute = default_execute;
428
429 ret->nb_inputs = avfilter_pad_count(filter->inputs);
430 if (ret->nb_inputs ) {
431 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
432 if (!ret->input_pads)
433 goto err;
434 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
435 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
436 if (!ret->inputs)
437 goto err;
438 }
439
440 ret->nb_outputs = avfilter_pad_count(filter->outputs);
441 if (ret->nb_outputs) {
442 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
443 if (!ret->output_pads)
444 goto err;
445 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
446 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
447 if (!ret->outputs)
448 goto err;
449 }
450
451 return ret;
452
453 err:
454 av_freep(&ret->inputs);
455 av_freep(&ret->input_pads);
456 ret->nb_inputs = 0;
457 av_freep(&ret->outputs);
458 av_freep(&ret->output_pads);
459 ret->nb_outputs = 0;
460 av_freep(&ret->priv);
461 av_freep(&ret->internal);
462 av_free(ret);
463 return NULL;
464 }
465
466 #if FF_API_AVFILTER_OPEN
467 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
468 {
469 *filter_ctx = ff_filter_alloc(filter, inst_name);
470 return *filter_ctx ? 0 : AVERROR(ENOMEM);
471 }
472 #endif
473
474 static void free_link(AVFilterLink *link)
475 {
476 if (!link)
477 return;
478
479 if (link->src)
480 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
481 if (link->dst)
482 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
483
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);
490 av_freep(&link);
491 }
492
493 void avfilter_free(AVFilterContext *filter)
494 {
495 int i;
496
497 if (filter->graph)
498 ff_filter_graph_remove_filter(filter->graph, filter);
499
500 if (filter->filter->uninit)
501 filter->filter->uninit(filter);
502
503 for (i = 0; i < filter->nb_inputs; i++) {
504 free_link(filter->inputs[i]);
505 }
506 for (i = 0; i < filter->nb_outputs; i++) {
507 free_link(filter->outputs[i]);
508 }
509
510 if (filter->filter->priv_class)
511 av_opt_free(filter->priv);
512
513 av_freep(&filter->name);
514 av_freep(&filter->input_pads);
515 av_freep(&filter->output_pads);
516 av_freep(&filter->inputs);
517 av_freep(&filter->outputs);
518 av_freep(&filter->priv);
519 av_freep(&filter->internal);
520 av_free(filter);
521 }
522
523 /* process a list of value1:value2:..., each value corresponding
524 * to subsequent AVOption, in the order they are declared */
525 static int process_unnamed_options(AVFilterContext *ctx, AVDictionary **options,
526 const char *args)
527 {
528 const AVOption *o = NULL;
529 const char *p = args;
530 char *val;
531
532 while (*p) {
533 o = av_opt_next(ctx->priv, o);
534 if (!o) {
535 av_log(ctx, AV_LOG_ERROR, "More options provided than "
536 "this filter supports.\n");
537 return AVERROR(EINVAL);
538 }
539 if (o->type == AV_OPT_TYPE_CONST)
540 continue;
541
542 val = av_get_token(&p, ":");
543 if (!val)
544 return AVERROR(ENOMEM);
545
546 av_dict_set(options, o->name, val, 0);
547
548 av_freep(&val);
549 if (*p)
550 p++;
551 }
552
553 return 0;
554 }
555
556 #if FF_API_AVFILTER_INIT_FILTER
557 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
558 {
559 return avfilter_init_str(filter, args);
560 }
561 #endif
562
563 int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
564 {
565 int ret = 0;
566
567 ret = av_opt_set_dict(ctx, options);
568 if (ret < 0) {
569 av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
570 return ret;
571 }
572
573 if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
574 ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
575 ctx->graph->internal->thread_execute) {
576 ctx->thread_type = AVFILTER_THREAD_SLICE;
577 ctx->internal->execute = ctx->graph->internal->thread_execute;
578 } else {
579 ctx->thread_type = 0;
580 }
581
582 if (ctx->filter->priv_class) {
583 ret = av_opt_set_dict(ctx->priv, options);
584 if (ret < 0) {
585 av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
586 return ret;
587 }
588 }
589
590 if (ctx->filter->init)
591 ret = ctx->filter->init(ctx);
592 else if (ctx->filter->init_dict)
593 ret = ctx->filter->init_dict(ctx, options);
594
595 return ret;
596 }
597
598 int avfilter_init_str(AVFilterContext *filter, const char *args)
599 {
600 AVDictionary *options = NULL;
601 AVDictionaryEntry *e;
602 int ret = 0;
603
604 if (args && *args) {
605 if (!filter->filter->priv_class) {
606 av_log(filter, AV_LOG_ERROR, "This filter does not take any "
607 "options, but options were provided: %s.\n", args);
608 return AVERROR(EINVAL);
609 }
610
611 #if FF_API_OLD_FILTER_OPTS
612 if (!strcmp(filter->filter->name, "scale") &&
613 strchr(args, ':') && strchr(args, ':') < strchr(args, '=')) {
614 /* old w:h:flags=<flags> syntax */
615 char *copy = av_strdup(args);
616 char *p;
617
618 av_log(filter, AV_LOG_WARNING, "The <w>:<h>:flags=<flags> option "
619 "syntax is deprecated. Use either <w>:<h>:<flags> or "
620 "w=<w>:h=<h>:flags=<flags>.\n");
621
622 if (!copy) {
623 ret = AVERROR(ENOMEM);
624 goto fail;
625 }
626
627 p = strrchr(copy, ':');
628 if (p) {
629 *p++ = 0;
630 ret = av_dict_parse_string(&options, p, "=", ":", 0);
631 }
632 if (ret >= 0)
633 ret = process_unnamed_options(filter, &options, copy);
634 av_freep(&copy);
635
636 if (ret < 0)
637 goto fail;
638 } else
639 #endif
640
641 if (strchr(args, '=')) {
642 /* assume a list of key1=value1:key2=value2:... */
643 ret = av_dict_parse_string(&options, args, "=", ":", 0);
644 if (ret < 0)
645 goto fail;
646 #if FF_API_OLD_FILTER_OPTS
647 } else if (!strcmp(filter->filter->name, "format") ||
648 !strcmp(filter->filter->name, "noformat") ||
649 !strcmp(filter->filter->name, "frei0r") ||
650 !strcmp(filter->filter->name, "frei0r_src") ||
651 !strcmp(filter->filter->name, "ocv")) {
652 /* a hack for compatibility with the old syntax
653 * replace colons with |s */
654 char *copy = av_strdup(args);
655 char *p = copy;
656 int nb_leading = 0; // number of leading colons to skip
657
658 if (!copy) {
659 ret = AVERROR(ENOMEM);
660 goto fail;
661 }
662
663 if (!strcmp(filter->filter->name, "frei0r") ||
664 !strcmp(filter->filter->name, "ocv"))
665 nb_leading = 1;
666 else if (!strcmp(filter->filter->name, "frei0r_src"))
667 nb_leading = 3;
668
669 while (nb_leading--) {
670 p = strchr(p, ':');
671 if (!p) {
672 p = copy + strlen(copy);
673 break;
674 }
675 p++;
676 }
677
678 if (strchr(p, ':')) {
679 av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
680 "'|' to separate the list items.\n");
681 }
682
683 while ((p = strchr(p, ':')))
684 *p++ = '|';
685
686 ret = process_unnamed_options(filter, &options, copy);
687 av_freep(&copy);
688
689 if (ret < 0)
690 goto fail;
691 #endif
692 } else {
693 ret = process_unnamed_options(filter, &options, args);
694 if (ret < 0)
695 goto fail;
696 }
697 }
698
699 ret = avfilter_init_dict(filter, &options);
700 if (ret < 0)
701 goto fail;
702
703 if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
704 av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
705 ret = AVERROR_OPTION_NOT_FOUND;
706 goto fail;
707 }
708
709 fail:
710 av_dict_free(&options);
711
712 return ret;
713 }
714
715 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
716 {
717 return pads[pad_idx].name;
718 }
719
720 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
721 {
722 return pads[pad_idx].type;
723 }
724
725 static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
726 {
727 return ff_filter_frame(link->dst->outputs[0], frame);
728 }
729
730 int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
731 {
732 int (*filter_frame)(AVFilterLink *, AVFrame *);
733 AVFilterPad *dst = link->dstpad;
734 AVFrame *out = NULL;
735 int ret;
736
737 FF_DPRINTF_START(NULL, filter_frame);
738 ff_dlog_link(NULL, link, 1);
739
740 if (!(filter_frame = dst->filter_frame))
741 filter_frame = default_filter_frame;
742
743 /* copy the frame if needed */
744 if (dst->needs_writable && !av_frame_is_writable(frame)) {
745 av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
746
747 switch (link->type) {
748 case AVMEDIA_TYPE_VIDEO:
749 out = ff_get_video_buffer(link, link->w, link->h);
750 break;
751 case AVMEDIA_TYPE_AUDIO:
752 out = ff_get_audio_buffer(link, frame->nb_samples);
753 break;
754 default:
755 ret = AVERROR(EINVAL);
756 goto fail;
757 }
758 if (!out) {
759 ret = AVERROR(ENOMEM);
760 goto fail;
761 }
762
763 ret = av_frame_copy_props(out, frame);
764 if (ret < 0)
765 goto fail;
766
767 switch (link->type) {
768 case AVMEDIA_TYPE_VIDEO:
769 av_image_copy(out->data, out->linesize, frame->data, frame->linesize,
770 frame->format, frame->width, frame->height);
771 break;
772 case AVMEDIA_TYPE_AUDIO:
773 av_samples_copy(out->extended_data, frame->extended_data,
774 0, 0, frame->nb_samples,
775 av_get_channel_layout_nb_channels(frame->channel_layout),
776 frame->format);
777 break;
778 default:
779 ret = AVERROR(EINVAL);
780 goto fail;
781 }
782
783 av_frame_free(&frame);
784 } else
785 out = frame;
786
787 return filter_frame(link, out);
788
789 fail:
790 av_frame_free(&out);
791 av_frame_free(&frame);
792 return ret;
793 }
794
795 const AVClass *avfilter_get_class(void)
796 {
797 return &avfilter_class;
798 }