3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
7 * FFmpeg 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.
12 * FFmpeg 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/pixdesc.h"
25 #include "libavutil/rational.h"
26 #include "libavutil/audioconvert.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/avassert.h"
32 unsigned avfilter_version(void) {
33 return LIBAVFILTER_VERSION_INT;
36 const char *avfilter_configuration(void)
38 return FFMPEG_CONFIGURATION;
41 const char *avfilter_license(void)
43 #define LICENSE_PREFIX "libavfilter license: "
44 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
47 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
49 AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
53 if (ref->type == AVMEDIA_TYPE_VIDEO) {
54 ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
59 *ret->video = *ref->video;
60 } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
61 ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
66 *ret->audio = *ref->audio;
69 ret->buf->refcount ++;
73 static void store_in_pool(AVFilterBufferRef *ref)
76 AVFilterPool *pool= ref->buf->priv;
78 av_assert0(ref->buf->data[0]);
80 if (pool->count == POOL_SIZE) {
81 AVFilterBufferRef *ref1 = pool->pic[0];
82 av_freep(&ref1->video);
83 av_freep(&ref1->audio);
84 av_freep(&ref1->buf->data[0]);
87 memmove(&pool->pic[0], &pool->pic[1], sizeof(void*)*(POOL_SIZE-1));
89 pool->pic[POOL_SIZE-1] = NULL;
92 for (i = 0; i < POOL_SIZE; i++) {
101 void avfilter_unref_buffer(AVFilterBufferRef *ref)
105 if (!(--ref->buf->refcount)) {
106 if (!ref->buf->free) {
110 ref->buf->free(ref->buf);
112 av_freep(&ref->video);
113 av_freep(&ref->audio);
117 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
118 AVFilterPad **pads, AVFilterLink ***links,
123 idx = FFMIN(idx, *count);
125 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
126 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
127 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
128 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
129 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
130 (*links)[idx] = NULL;
133 for (i = idx+1; i < *count; i++)
135 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
138 int avfilter_link(AVFilterContext *src, unsigned srcpad,
139 AVFilterContext *dst, unsigned dstpad)
143 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
144 src->outputs[srcpad] || dst->inputs[dstpad])
147 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
148 av_log(src, AV_LOG_ERROR,
149 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
150 src->name, srcpad, dst->name, dstpad);
151 return AVERROR(EINVAL);
154 src->outputs[srcpad] =
155 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
159 link->srcpad = &src->output_pads[srcpad];
160 link->dstpad = &dst->input_pads[dstpad];
161 link->type = src->output_pads[srcpad].type;
162 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
168 void avfilter_link_free(AVFilterLink **link)
175 for (i = 0; i < POOL_SIZE; i++) {
176 if ((*link)->pool->pic[i]) {
177 AVFilterBufferRef *picref = (*link)->pool->pic[i];
178 /* free buffer: picrefs stored in the pool are not
179 * supposed to contain a free callback */
180 av_freep(&picref->buf->data[0]);
181 av_freep(&picref->buf);
183 av_freep(&picref->audio);
184 av_freep(&picref->video);
185 av_freep(&(*link)->pool->pic[i]);
188 (*link)->pool->count = 0;
189 // av_freep(&(*link)->pool);
194 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
195 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
198 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
200 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
201 "between the filter '%s' and the filter '%s'\n",
202 filt->name, link->src->name, link->dst->name);
204 link->dst->inputs[dstpad_idx] = NULL;
205 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
206 /* failed to link output filter to new filter */
207 link->dst->inputs[dstpad_idx] = link;
211 /* re-hookup the link to the new destination filter we inserted */
213 link->dstpad = &filt->input_pads[filt_srcpad_idx];
214 filt->inputs[filt_srcpad_idx] = link;
216 /* if any information on supported media formats already exists on the
217 * link, we need to preserve that */
218 if (link->out_formats)
219 avfilter_formats_changeref(&link->out_formats,
220 &filt->outputs[filt_dstpad_idx]->out_formats);
221 if (link->out_chlayouts)
222 avfilter_formats_changeref(&link->out_chlayouts,
223 &filt->outputs[filt_dstpad_idx]->out_chlayouts);
224 if (link->out_packing)
225 avfilter_formats_changeref(&link->out_packing,
226 &filt->outputs[filt_dstpad_idx]->out_packing);
231 int avfilter_config_links(AVFilterContext *filter)
233 int (*config_link)(AVFilterLink *);
237 for (i = 0; i < filter->input_count; i ++) {
238 AVFilterLink *link = filter->inputs[i];
242 switch (link->init_state) {
245 case AVLINK_STARTINIT:
246 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
249 link->init_state = AVLINK_STARTINIT;
251 if ((ret = avfilter_config_links(link->src)) < 0)
254 if (!(config_link = link->srcpad->config_props)) {
255 if (link->src->input_count != 1) {
256 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
257 "with more than one input "
258 "must set config_props() "
259 "callbacks on all outputs\n");
260 return AVERROR(EINVAL);
262 } else if ((ret = config_link(link)) < 0)
265 switch (link->type) {
266 case AVMEDIA_TYPE_VIDEO:
267 if (!link->time_base.num && !link->time_base.den)
268 link->time_base = link->src->input_count ?
269 link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
271 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
272 link->sample_aspect_ratio = link->src->input_count ?
273 link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
275 if (link->src->input_count) {
277 link->w = link->src->inputs[0]->w;
279 link->h = link->src->inputs[0]->h;
280 } else if (!link->w || !link->h) {
281 av_log(link->src, AV_LOG_ERROR,
282 "Video source filters must set their output link's "
283 "width and height\n");
284 return AVERROR(EINVAL);
288 case AVMEDIA_TYPE_AUDIO:
289 if (link->src->input_count) {
290 if (!link->sample_rate)
291 link->sample_rate = link->src->inputs[0]->sample_rate;
292 } else if (!link->sample_rate) {
293 av_log(link->src, AV_LOG_ERROR,
294 "Audio source filters must set their output link's "
296 return AVERROR(EINVAL);
300 if ((config_link = link->dstpad->config_props))
301 if ((ret = config_link(link)) < 0)
304 link->init_state = AVLINK_INIT;
311 static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
313 snprintf(buf, buf_size, "%s%s%s%s%s%s",
314 perms & AV_PERM_READ ? "r" : "",
315 perms & AV_PERM_WRITE ? "w" : "",
316 perms & AV_PERM_PRESERVE ? "p" : "",
317 perms & AV_PERM_REUSE ? "u" : "",
318 perms & AV_PERM_REUSE2 ? "U" : "",
319 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
323 static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
325 av_unused char buf[16];
327 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
328 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
329 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
333 av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
334 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
335 ref->video->w, ref->video->h,
336 !ref->video->interlaced ? 'P' : /* Progressive */
337 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
338 ref->video->key_frame,
339 av_get_picture_type_char(ref->video->pict_type));
342 av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",
343 ref->audio->channel_layout,
344 ref->audio->nb_samples,
345 ref->audio->sample_rate,
349 av_dlog(ctx, "]%s", end ? "\n" : "");
352 static void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
354 if (link->type == AVMEDIA_TYPE_VIDEO) {
356 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
357 link, link->w, link->h,
358 av_pix_fmt_descriptors[link->format].name,
359 link->src ? link->src->filter->name : "",
360 link->dst ? link->dst->filter->name : "",
364 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
367 "link[%p r:%"PRId64" cl:%s fmt:%-16s %-16s->%-16s]%s",
368 link, link->sample_rate, buf,
369 av_get_sample_fmt_name(link->format),
370 link->src ? link->src->filter->name : "",
371 link->dst ? link->dst->filter->name : "",
376 #define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func)
378 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
380 AVFilterBufferRef *ret = NULL;
382 av_unused char buf[16];
383 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
384 av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
386 if (link->dstpad->get_video_buffer)
387 ret = link->dstpad->get_video_buffer(link, perms, w, h);
390 ret = avfilter_default_get_video_buffer(link, perms, w, h);
393 ret->type = AVMEDIA_TYPE_VIDEO;
395 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
401 avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
402 int w, int h, enum PixelFormat format)
404 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
405 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
411 picref->buf->free = ff_avfilter_default_free_buffer;
412 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
415 pic->w = picref->video->w = w;
416 pic->h = picref->video->h = h;
418 /* make sure the buffer gets read permission or it's useless for output */
419 picref->perms = perms | AV_PERM_READ;
422 picref->type = AVMEDIA_TYPE_VIDEO;
423 pic->format = picref->format = format;
425 memcpy(pic->data, data, sizeof(pic->data));
426 memcpy(pic->linesize, linesize, sizeof(pic->linesize));
427 memcpy(picref->data, pic->data, sizeof(picref->data));
428 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
433 if (picref && picref->video)
434 av_free(picref->video);
440 AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
441 enum AVSampleFormat sample_fmt, int nb_samples,
442 int64_t channel_layout, int planar)
444 AVFilterBufferRef *ret = NULL;
446 if (link->dstpad->get_audio_buffer)
447 ret = link->dstpad->get_audio_buffer(link, perms, sample_fmt, nb_samples, channel_layout, planar);
450 ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, nb_samples, channel_layout, planar);
453 ret->type = AVMEDIA_TYPE_AUDIO;
459 avfilter_get_audio_buffer_ref_from_arrays(uint8_t *data[8], int linesize[8], int perms,
460 int nb_samples, enum AVSampleFormat sample_fmt,
461 int64_t channel_layout, int planar)
463 AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
464 AVFilterBufferRef *samplesref = av_mallocz(sizeof(AVFilterBufferRef));
466 if (!samples || !samplesref)
469 samplesref->buf = samples;
470 samplesref->buf->free = ff_avfilter_default_free_buffer;
471 if (!(samplesref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps))))
474 samplesref->audio->nb_samples = nb_samples;
475 samplesref->audio->channel_layout = channel_layout;
476 samplesref->audio->planar = planar;
478 /* make sure the buffer gets read permission or it's useless for output */
479 samplesref->perms = perms | AV_PERM_READ;
481 samples->refcount = 1;
482 samplesref->type = AVMEDIA_TYPE_AUDIO;
483 samplesref->format = sample_fmt;
485 memcpy(samples->data, data, sizeof(samples->data));
486 memcpy(samples->linesize, linesize, sizeof(samples->linesize));
487 memcpy(samplesref->data, data, sizeof(samplesref->data));
488 memcpy(samplesref->linesize, linesize, sizeof(samplesref->linesize));
493 if (samplesref && samplesref->audio)
494 av_freep(&samplesref->audio);
495 av_freep(&samplesref);
500 int avfilter_request_frame(AVFilterLink *link)
502 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
504 if (link->srcpad->request_frame)
505 return link->srcpad->request_frame(link);
506 else if (link->src->inputs[0])
507 return avfilter_request_frame(link->src->inputs[0]);
511 int avfilter_poll_frame(AVFilterLink *link)
513 int i, min = INT_MAX;
515 if (link->srcpad->poll_frame)
516 return link->srcpad->poll_frame(link);
518 for (i = 0; i < link->src->input_count; i++) {
520 if (!link->src->inputs[i])
522 val = avfilter_poll_frame(link->src->inputs[i]);
523 min = FFMIN(min, val);
529 /* XXX: should we do the duplicating of the picture ref here, instead of
530 * forcing the source filter to do it? */
531 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
533 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
534 AVFilterPad *dst = link->dstpad;
535 int perms = picref->perms;
537 FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
539 if (!(start_frame = dst->start_frame))
540 start_frame = avfilter_default_start_frame;
542 if (picref->linesize[0] < 0)
543 perms |= AV_PERM_NEG_LINESIZES;
544 /* prepare to copy the picture if it has insufficient permissions */
545 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
546 av_log(link->dst, AV_LOG_DEBUG,
547 "frame copy needed (have perms %x, need %x, reject %x)\n",
549 link->dstpad->min_perms, link->dstpad->rej_perms);
551 link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
552 link->src_buf = picref;
553 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
556 link->cur_buf = picref;
558 start_frame(link, link->cur_buf);
561 void avfilter_end_frame(AVFilterLink *link)
563 void (*end_frame)(AVFilterLink *);
565 if (!(end_frame = link->dstpad->end_frame))
566 end_frame = avfilter_default_end_frame;
570 /* unreference the source picture if we're feeding the destination filter
571 * a copied version dues to permission issues */
573 avfilter_unref_buffer(link->src_buf);
574 link->src_buf = NULL;
578 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
580 uint8_t *src[4], *dst[4];
582 void (*draw_slice)(AVFilterLink *, int, int, int);
584 FF_DPRINTF_START(NULL, draw_slice); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
586 /* copy the slice if needed for permission reasons */
588 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
590 for (i = 0; i < 4; i++) {
591 if (link->src_buf->data[i]) {
592 src[i] = link->src_buf-> data[i] +
593 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
594 dst[i] = link->cur_buf->data[i] +
595 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
597 src[i] = dst[i] = NULL;
600 for (i = 0; i < 4; i++) {
602 av_image_get_linesize(link->format, link->cur_buf->video->w, i);
604 if (!src[i]) continue;
606 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
607 memcpy(dst[i], src[i], planew);
608 src[i] += link->src_buf->linesize[i];
609 dst[i] += link->cur_buf->linesize[i];
614 if (!(draw_slice = link->dstpad->draw_slice))
615 draw_slice = avfilter_default_draw_slice;
616 draw_slice(link, y, h, slice_dir);
619 void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
621 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
622 AVFilterPad *dst = link->dstpad;
625 FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
627 if (!(filter_samples = dst->filter_samples))
628 filter_samples = avfilter_default_filter_samples;
630 /* prepare to copy the samples if the buffer has insufficient permissions */
631 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
632 dst->rej_perms & samplesref->perms) {
634 av_log(link->dst, AV_LOG_DEBUG,
635 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
636 samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
638 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
640 samplesref->audio->nb_samples,
641 samplesref->audio->channel_layout,
642 samplesref->audio->planar);
643 link->cur_buf->pts = samplesref->pts;
644 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
646 /* Copy actual data into new samples buffer */
647 for (i = 0; samplesref->data[i]; i++)
648 memcpy(link->cur_buf->data[i], samplesref->data[i], samplesref->linesize[0]);
650 avfilter_unref_buffer(samplesref);
652 link->cur_buf = samplesref;
654 filter_samples(link, link->cur_buf);
657 #define MAX_REGISTERED_AVFILTERS_NB 64
659 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
661 static int next_registered_avfilter_idx = 0;
663 AVFilter *avfilter_get_by_name(const char *name)
667 for (i = 0; registered_avfilters[i]; i++)
668 if (!strcmp(registered_avfilters[i]->name, name))
669 return registered_avfilters[i];
674 int avfilter_register(AVFilter *filter)
676 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
679 registered_avfilters[next_registered_avfilter_idx++] = filter;
683 AVFilter **av_filter_next(AVFilter **filter)
685 return filter ? ++filter : ®istered_avfilters[0];
688 void avfilter_uninit(void)
690 memset(registered_avfilters, 0, sizeof(registered_avfilters));
691 next_registered_avfilter_idx = 0;
694 static int pad_count(const AVFilterPad *pads)
698 for(count = 0; pads->name; count ++) pads ++;
702 static const char *filter_name(void *p)
704 AVFilterContext *filter = p;
705 return filter->filter->name;
708 static const AVClass avfilter_class = {
712 LIBAVUTIL_VERSION_INT,
715 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
717 AVFilterContext *ret;
721 return AVERROR(EINVAL);
723 ret = av_mallocz(sizeof(AVFilterContext));
725 return AVERROR(ENOMEM);
727 ret->av_class = &avfilter_class;
728 ret->filter = filter;
729 ret->name = inst_name ? av_strdup(inst_name) : NULL;
730 if (filter->priv_size) {
731 ret->priv = av_mallocz(filter->priv_size);
736 ret->input_count = pad_count(filter->inputs);
737 if (ret->input_count) {
738 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
739 if (!ret->input_pads)
741 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
742 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
747 ret->output_count = pad_count(filter->outputs);
748 if (ret->output_count) {
749 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
750 if (!ret->output_pads)
752 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
753 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
762 av_freep(&ret->inputs);
763 av_freep(&ret->input_pads);
764 ret->input_count = 0;
765 av_freep(&ret->outputs);
766 av_freep(&ret->output_pads);
767 ret->output_count = 0;
768 av_freep(&ret->priv);
770 return AVERROR(ENOMEM);
773 void avfilter_free(AVFilterContext *filter)
778 if (filter->filter->uninit)
779 filter->filter->uninit(filter);
781 for (i = 0; i < filter->input_count; i++) {
782 if ((link = filter->inputs[i])) {
784 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
785 avfilter_formats_unref(&link->in_formats);
786 avfilter_formats_unref(&link->out_formats);
788 avfilter_link_free(&link);
790 for (i = 0; i < filter->output_count; i++) {
791 if ((link = filter->outputs[i])) {
793 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
794 avfilter_formats_unref(&link->in_formats);
795 avfilter_formats_unref(&link->out_formats);
797 avfilter_link_free(&link);
800 av_freep(&filter->name);
801 av_freep(&filter->input_pads);
802 av_freep(&filter->output_pads);
803 av_freep(&filter->inputs);
804 av_freep(&filter->outputs);
805 av_freep(&filter->priv);
809 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
813 if (filter->filter->init)
814 ret = filter->filter->init(filter, args, opaque);