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"
29 #include "libavutil/avstring.h"
33 unsigned avfilter_version(void) {
34 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
35 return LIBAVFILTER_VERSION_INT;
38 const char *avfilter_configuration(void)
40 return FFMPEG_CONFIGURATION;
43 const char *avfilter_license(void)
45 #define LICENSE_PREFIX "libavfilter license: "
46 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
49 static void command_queue_pop(AVFilterContext *filter)
51 AVFilterCommand *c= filter->command_queue;
53 av_freep(&c->command);
54 filter->command_queue= c->next;
58 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
60 AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
64 if (ref->type == AVMEDIA_TYPE_VIDEO) {
65 ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
70 *ret->video = *ref->video;
71 } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
72 ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
77 *ret->audio = *ref->audio;
80 ret->buf->refcount ++;
84 static void store_in_pool(AVFilterBufferRef *ref)
87 AVFilterPool *pool= ref->buf->priv;
89 av_assert0(ref->buf->data[0]);
91 if (pool->count == POOL_SIZE) {
92 AVFilterBufferRef *ref1 = pool->pic[0];
93 av_freep(&ref1->video);
94 av_freep(&ref1->audio);
95 av_freep(&ref1->buf->data[0]);
98 memmove(&pool->pic[0], &pool->pic[1], sizeof(void*)*(POOL_SIZE-1));
100 pool->pic[POOL_SIZE-1] = NULL;
103 for (i = 0; i < POOL_SIZE; i++) {
112 void avfilter_unref_buffer(AVFilterBufferRef *ref)
116 if (!(--ref->buf->refcount)) {
117 if (!ref->buf->free) {
121 ref->buf->free(ref->buf);
123 av_freep(&ref->video);
124 av_freep(&ref->audio);
128 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
129 AVFilterPad **pads, AVFilterLink ***links,
134 idx = FFMIN(idx, *count);
136 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
137 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
138 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
139 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
140 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
141 (*links)[idx] = NULL;
144 for (i = idx+1; i < *count; i++)
146 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
149 int avfilter_link(AVFilterContext *src, unsigned srcpad,
150 AVFilterContext *dst, unsigned dstpad)
154 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
155 src->outputs[srcpad] || dst->inputs[dstpad])
158 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
159 av_log(src, AV_LOG_ERROR,
160 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
161 src->name, srcpad, dst->name, dstpad);
162 return AVERROR(EINVAL);
165 src->outputs[srcpad] =
166 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
170 link->srcpad = &src->output_pads[srcpad];
171 link->dstpad = &dst->input_pads[dstpad];
172 link->type = src->output_pads[srcpad].type;
173 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
179 void avfilter_link_free(AVFilterLink **link)
186 for (i = 0; i < POOL_SIZE; i++) {
187 if ((*link)->pool->pic[i]) {
188 AVFilterBufferRef *picref = (*link)->pool->pic[i];
189 /* free buffer: picrefs stored in the pool are not
190 * supposed to contain a free callback */
191 av_freep(&picref->buf->data[0]);
192 av_freep(&picref->buf);
194 av_freep(&picref->audio);
195 av_freep(&picref->video);
196 av_freep(&(*link)->pool->pic[i]);
199 (*link)->pool->count = 0;
200 // av_freep(&(*link)->pool);
205 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
206 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
209 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
211 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
212 "between the filter '%s' and the filter '%s'\n",
213 filt->name, link->src->name, link->dst->name);
215 link->dst->inputs[dstpad_idx] = NULL;
216 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
217 /* failed to link output filter to new filter */
218 link->dst->inputs[dstpad_idx] = link;
222 /* re-hookup the link to the new destination filter we inserted */
224 link->dstpad = &filt->input_pads[filt_srcpad_idx];
225 filt->inputs[filt_srcpad_idx] = link;
227 /* if any information on supported media formats already exists on the
228 * link, we need to preserve that */
229 if (link->out_formats)
230 avfilter_formats_changeref(&link->out_formats,
231 &filt->outputs[filt_dstpad_idx]->out_formats);
232 if (link->out_chlayouts)
233 avfilter_formats_changeref(&link->out_chlayouts,
234 &filt->outputs[filt_dstpad_idx]->out_chlayouts);
235 if (link->out_packing)
236 avfilter_formats_changeref(&link->out_packing,
237 &filt->outputs[filt_dstpad_idx]->out_packing);
242 int avfilter_config_links(AVFilterContext *filter)
244 int (*config_link)(AVFilterLink *);
248 for (i = 0; i < filter->input_count; i ++) {
249 AVFilterLink *link = filter->inputs[i];
250 AVFilterLink *inlink = link->src->input_count ?
251 link->src->inputs[0] : NULL;
255 switch (link->init_state) {
258 case AVLINK_STARTINIT:
259 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
262 link->init_state = AVLINK_STARTINIT;
264 if ((ret = avfilter_config_links(link->src)) < 0)
267 if (!(config_link = link->srcpad->config_props)) {
268 if (link->src->input_count != 1) {
269 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
270 "with more than one input "
271 "must set config_props() "
272 "callbacks on all outputs\n");
273 return AVERROR(EINVAL);
275 } else if ((ret = config_link(link)) < 0)
278 switch (link->type) {
279 case AVMEDIA_TYPE_VIDEO:
280 if (!link->time_base.num && !link->time_base.den)
281 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
283 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
284 link->sample_aspect_ratio = inlink ?
285 inlink->sample_aspect_ratio : (AVRational){1,1};
292 } else if (!link->w || !link->h) {
293 av_log(link->src, AV_LOG_ERROR,
294 "Video source filters must set their output link's "
295 "width and height\n");
296 return AVERROR(EINVAL);
300 case AVMEDIA_TYPE_AUDIO:
302 if (!link->sample_rate)
303 link->sample_rate = inlink->sample_rate;
304 if (!link->time_base.num && !link->time_base.den)
305 link->time_base = inlink->time_base;
306 } else if (!link->sample_rate) {
307 av_log(link->src, AV_LOG_ERROR,
308 "Audio source filters must set their output link's "
310 return AVERROR(EINVAL);
313 if (!link->time_base.num && !link->time_base.den)
314 link->time_base = (AVRational) {1, link->sample_rate};
317 if ((config_link = link->dstpad->config_props))
318 if ((ret = config_link(link)) < 0)
321 link->init_state = AVLINK_INIT;
328 static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
330 snprintf(buf, buf_size, "%s%s%s%s%s%s",
331 perms & AV_PERM_READ ? "r" : "",
332 perms & AV_PERM_WRITE ? "w" : "",
333 perms & AV_PERM_PRESERVE ? "p" : "",
334 perms & AV_PERM_REUSE ? "u" : "",
335 perms & AV_PERM_REUSE2 ? "U" : "",
336 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
340 static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
342 av_unused char buf[16];
344 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
345 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
346 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
350 av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
351 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
352 ref->video->w, ref->video->h,
353 !ref->video->interlaced ? 'P' : /* Progressive */
354 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
355 ref->video->key_frame,
356 av_get_picture_type_char(ref->video->pict_type));
359 av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",
360 ref->audio->channel_layout,
361 ref->audio->nb_samples,
362 ref->audio->sample_rate,
366 av_dlog(ctx, "]%s", end ? "\n" : "");
369 static void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
371 if (link->type == AVMEDIA_TYPE_VIDEO) {
373 "link[%p s:%dx%d fmt:%s %s->%s]%s",
374 link, link->w, link->h,
375 av_pix_fmt_descriptors[link->format].name,
376 link->src ? link->src->filter->name : "",
377 link->dst ? link->dst->filter->name : "",
381 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
384 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
385 link, (int)link->sample_rate, buf,
386 av_get_sample_fmt_name(link->format),
387 link->src ? link->src->filter->name : "",
388 link->dst ? link->dst->filter->name : "",
393 #define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func)
395 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
397 AVFilterBufferRef *ret = NULL;
399 av_unused char buf[16];
400 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
401 av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
403 if (link->dstpad->get_video_buffer)
404 ret = link->dstpad->get_video_buffer(link, perms, w, h);
407 ret = avfilter_default_get_video_buffer(link, perms, w, h);
410 ret->type = AVMEDIA_TYPE_VIDEO;
412 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
418 avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
419 int w, int h, enum PixelFormat format)
421 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
422 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
428 picref->buf->free = ff_avfilter_default_free_buffer;
429 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
432 pic->w = picref->video->w = w;
433 pic->h = picref->video->h = h;
435 /* make sure the buffer gets read permission or it's useless for output */
436 picref->perms = perms | AV_PERM_READ;
439 picref->type = AVMEDIA_TYPE_VIDEO;
440 pic->format = picref->format = format;
442 memcpy(pic->data, data, 4*sizeof(data[0]));
443 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
444 memcpy(picref->data, pic->data, sizeof(picref->data));
445 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
450 if (picref && picref->video)
451 av_free(picref->video);
457 AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link,
458 int perms, int nb_samples)
460 AVFilterBufferRef *ret = NULL;
462 if (link->dstpad->get_audio_buffer)
463 ret = link->dstpad->get_audio_buffer(link, perms, nb_samples);
466 ret = avfilter_default_get_audio_buffer(link, perms, nb_samples);
469 ret->type = AVMEDIA_TYPE_AUDIO;
475 avfilter_get_audio_buffer_ref_from_arrays(uint8_t *data[8], int linesize[8], int perms,
476 int nb_samples, enum AVSampleFormat sample_fmt,
477 uint64_t channel_layout, int planar)
479 AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
480 AVFilterBufferRef *samplesref = av_mallocz(sizeof(AVFilterBufferRef));
482 if (!samples || !samplesref)
485 samplesref->buf = samples;
486 samplesref->buf->free = ff_avfilter_default_free_buffer;
487 if (!(samplesref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps))))
490 samplesref->audio->nb_samples = nb_samples;
491 samplesref->audio->channel_layout = channel_layout;
492 samplesref->audio->planar = planar;
494 /* make sure the buffer gets read permission or it's useless for output */
495 samplesref->perms = perms | AV_PERM_READ;
497 samples->refcount = 1;
498 samplesref->type = AVMEDIA_TYPE_AUDIO;
499 samplesref->format = sample_fmt;
501 memcpy(samples->data, data, sizeof(samples->data));
502 memcpy(samples->linesize, linesize, sizeof(samples->linesize));
503 memcpy(samplesref->data, data, sizeof(samplesref->data));
504 memcpy(samplesref->linesize, linesize, sizeof(samplesref->linesize));
509 if (samplesref && samplesref->audio)
510 av_freep(&samplesref->audio);
511 av_freep(&samplesref);
516 int avfilter_request_frame(AVFilterLink *link)
518 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
520 if (link->srcpad->request_frame)
521 return link->srcpad->request_frame(link);
522 else if (link->src->inputs[0])
523 return avfilter_request_frame(link->src->inputs[0]);
527 int avfilter_poll_frame(AVFilterLink *link)
529 int i, min = INT_MAX;
531 if (link->srcpad->poll_frame)
532 return link->srcpad->poll_frame(link);
534 for (i = 0; i < link->src->input_count; i++) {
536 if (!link->src->inputs[i])
538 val = avfilter_poll_frame(link->src->inputs[i]);
539 min = FFMIN(min, val);
545 /* XXX: should we do the duplicating of the picture ref here, instead of
546 * forcing the source filter to do it? */
547 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
549 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
550 AVFilterPad *dst = link->dstpad;
551 int perms = picref->perms;
552 AVFilterCommand *cmd= link->dst->command_queue;
554 FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
556 if (!(start_frame = dst->start_frame))
557 start_frame = avfilter_default_start_frame;
559 if (picref->linesize[0] < 0)
560 perms |= AV_PERM_NEG_LINESIZES;
561 /* prepare to copy the picture if it has insufficient permissions */
562 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
563 av_log(link->dst, AV_LOG_DEBUG,
564 "frame copy needed (have perms %x, need %x, reject %x)\n",
566 link->dstpad->min_perms, link->dstpad->rej_perms);
568 link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
569 link->src_buf = picref;
570 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
573 link->cur_buf = picref;
575 while(cmd && cmd->time <= picref->pts * av_q2d(link->time_base)){
576 av_log(link->dst, AV_LOG_DEBUG,
577 "Processing command time:%f command:%s arg:%s\n",
578 cmd->time, cmd->command, cmd->arg);
579 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
580 command_queue_pop(link->dst);
581 cmd= link->dst->command_queue;
584 start_frame(link, link->cur_buf);
587 void avfilter_end_frame(AVFilterLink *link)
589 void (*end_frame)(AVFilterLink *);
591 if (!(end_frame = link->dstpad->end_frame))
592 end_frame = avfilter_default_end_frame;
596 /* unreference the source picture if we're feeding the destination filter
597 * a copied version dues to permission issues */
599 avfilter_unref_buffer(link->src_buf);
600 link->src_buf = NULL;
604 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
606 uint8_t *src[4], *dst[4];
608 void (*draw_slice)(AVFilterLink *, int, int, int);
610 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);
612 /* copy the slice if needed for permission reasons */
614 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
616 for (i = 0; i < 4; i++) {
617 if (link->src_buf->data[i]) {
618 src[i] = link->src_buf-> data[i] +
619 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
620 dst[i] = link->cur_buf->data[i] +
621 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
623 src[i] = dst[i] = NULL;
626 for (i = 0; i < 4; i++) {
628 av_image_get_linesize(link->format, link->cur_buf->video->w, i);
630 if (!src[i]) continue;
632 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
633 memcpy(dst[i], src[i], planew);
634 src[i] += link->src_buf->linesize[i];
635 dst[i] += link->cur_buf->linesize[i];
640 if (!(draw_slice = link->dstpad->draw_slice))
641 draw_slice = avfilter_default_draw_slice;
642 draw_slice(link, y, h, slice_dir);
645 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
647 if(!strcmp(cmd, "ping")){
648 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
650 }else if(filter->filter->process_command) {
651 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
653 return AVERROR(ENOSYS);
656 void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
658 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
659 AVFilterPad *dst = link->dstpad;
662 FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
664 if (!(filter_samples = dst->filter_samples))
665 filter_samples = avfilter_default_filter_samples;
667 /* prepare to copy the samples if the buffer has insufficient permissions */
668 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
669 dst->rej_perms & samplesref->perms) {
671 av_log(link->dst, AV_LOG_DEBUG,
672 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
673 samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
675 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
676 samplesref->audio->nb_samples);
677 link->cur_buf->pts = samplesref->pts;
678 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
680 /* Copy actual data into new samples buffer */
681 for (i = 0; samplesref->data[i] && i < 8; i++)
682 memcpy(link->cur_buf->data[i], samplesref->data[i], samplesref->linesize[0]);
684 avfilter_unref_buffer(samplesref);
686 link->cur_buf = samplesref;
688 filter_samples(link, link->cur_buf);
691 #define MAX_REGISTERED_AVFILTERS_NB 128
693 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
695 static int next_registered_avfilter_idx = 0;
697 AVFilter *avfilter_get_by_name(const char *name)
701 for (i = 0; registered_avfilters[i]; i++)
702 if (!strcmp(registered_avfilters[i]->name, name))
703 return registered_avfilters[i];
708 int avfilter_register(AVFilter *filter)
710 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
711 av_log(NULL, AV_LOG_ERROR,
712 "Maximum number of registered filters %d reached, "
713 "impossible to register filter with name '%s'\n",
714 MAX_REGISTERED_AVFILTERS_NB, filter->name);
715 return AVERROR(ENOMEM);
718 registered_avfilters[next_registered_avfilter_idx++] = filter;
722 AVFilter **av_filter_next(AVFilter **filter)
724 return filter ? ++filter : ®istered_avfilters[0];
727 void avfilter_uninit(void)
729 memset(registered_avfilters, 0, sizeof(registered_avfilters));
730 next_registered_avfilter_idx = 0;
733 static int pad_count(const AVFilterPad *pads)
737 for(count = 0; pads->name; count ++) pads ++;
741 static const char *filter_name(void *p)
743 AVFilterContext *filter = p;
744 return filter->filter->name;
747 static const AVClass avfilter_class = {
751 LIBAVUTIL_VERSION_INT,
754 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
756 AVFilterContext *ret;
760 return AVERROR(EINVAL);
762 ret = av_mallocz(sizeof(AVFilterContext));
764 return AVERROR(ENOMEM);
766 ret->av_class = &avfilter_class;
767 ret->filter = filter;
768 ret->name = inst_name ? av_strdup(inst_name) : NULL;
769 if (filter->priv_size) {
770 ret->priv = av_mallocz(filter->priv_size);
775 ret->input_count = pad_count(filter->inputs);
776 if (ret->input_count) {
777 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
778 if (!ret->input_pads)
780 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
781 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
786 ret->output_count = pad_count(filter->outputs);
787 if (ret->output_count) {
788 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
789 if (!ret->output_pads)
791 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
792 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
801 av_freep(&ret->inputs);
802 av_freep(&ret->input_pads);
803 ret->input_count = 0;
804 av_freep(&ret->outputs);
805 av_freep(&ret->output_pads);
806 ret->output_count = 0;
807 av_freep(&ret->priv);
809 return AVERROR(ENOMEM);
812 void avfilter_free(AVFilterContext *filter)
817 if (filter->filter->uninit)
818 filter->filter->uninit(filter);
820 for (i = 0; i < filter->input_count; i++) {
821 if ((link = filter->inputs[i])) {
823 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
824 avfilter_formats_unref(&link->in_formats);
825 avfilter_formats_unref(&link->out_formats);
827 avfilter_link_free(&link);
829 for (i = 0; i < filter->output_count; i++) {
830 if ((link = filter->outputs[i])) {
832 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
833 avfilter_formats_unref(&link->in_formats);
834 avfilter_formats_unref(&link->out_formats);
836 avfilter_link_free(&link);
839 av_freep(&filter->name);
840 av_freep(&filter->input_pads);
841 av_freep(&filter->output_pads);
842 av_freep(&filter->inputs);
843 av_freep(&filter->outputs);
844 av_freep(&filter->priv);
845 while(filter->command_queue){
846 command_queue_pop(filter);
851 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
855 if (filter->filter->init)
856 ret = filter->filter->init(filter, args, opaque);