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
22 #include "libavutil/avassert.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/channel_layout.h"
25 #include "libavutil/common.h"
26 #include "libavutil/imgutils.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/rational.h"
29 #include "libavutil/samplefmt.h"
37 static int ff_filter_frame_framed(AVFilterLink *link, AVFilterBufferRef *frame);
39 char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
41 snprintf(buf, buf_size, "%s%s%s%s%s%s",
42 perms & AV_PERM_READ ? "r" : "",
43 perms & AV_PERM_WRITE ? "w" : "",
44 perms & AV_PERM_PRESERVE ? "p" : "",
45 perms & AV_PERM_REUSE ? "u" : "",
46 perms & AV_PERM_REUSE2 ? "U" : "",
47 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
51 void ff_tlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
53 av_unused char buf[16];
55 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
56 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
57 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
61 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
62 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
63 ref->video->w, ref->video->h,
64 !ref->video->interlaced ? 'P' : /* Progressive */
65 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
66 ref->video->key_frame,
67 av_get_picture_type_char(ref->video->pict_type));
70 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
71 ref->audio->channel_layout,
72 ref->audio->nb_samples,
73 ref->audio->sample_rate);
76 ff_tlog(ctx, "]%s", end ? "\n" : "");
79 unsigned avfilter_version(void) {
80 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
81 return LIBAVFILTER_VERSION_INT;
84 const char *avfilter_configuration(void)
86 return FFMPEG_CONFIGURATION;
89 const char *avfilter_license(void)
91 #define LICENSE_PREFIX "libavfilter license: "
92 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
95 void ff_command_queue_pop(AVFilterContext *filter)
97 AVFilterCommand *c= filter->command_queue;
99 av_freep(&c->command);
100 filter->command_queue= c->next;
104 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
105 AVFilterPad **pads, AVFilterLink ***links,
110 idx = FFMIN(idx, *count);
112 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
113 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
114 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
115 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
116 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
117 (*links)[idx] = NULL;
120 for (i = idx+1; i < *count; i++)
122 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
125 int avfilter_link(AVFilterContext *src, unsigned srcpad,
126 AVFilterContext *dst, unsigned dstpad)
130 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
131 src->outputs[srcpad] || dst->inputs[dstpad])
134 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
135 av_log(src, AV_LOG_ERROR,
136 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
137 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
138 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
139 return AVERROR(EINVAL);
142 src->outputs[srcpad] =
143 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
147 link->srcpad = &src->output_pads[srcpad];
148 link->dstpad = &dst->input_pads[dstpad];
149 link->type = src->output_pads[srcpad].type;
150 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
156 void avfilter_link_free(AVFilterLink **link)
162 ff_free_pool((*link)->pool);
164 avfilter_unref_bufferp(&(*link)->partial_buf);
169 int avfilter_link_get_channels(AVFilterLink *link)
171 return link->channels;
174 void avfilter_link_set_closed(AVFilterLink *link, int closed)
176 link->closed = closed;
179 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
180 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
183 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
185 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
186 "between the filter '%s' and the filter '%s'\n",
187 filt->name, link->src->name, link->dst->name);
189 link->dst->inputs[dstpad_idx] = NULL;
190 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
191 /* failed to link output filter to new filter */
192 link->dst->inputs[dstpad_idx] = link;
196 /* re-hookup the link to the new destination filter we inserted */
198 link->dstpad = &filt->input_pads[filt_srcpad_idx];
199 filt->inputs[filt_srcpad_idx] = link;
201 /* if any information on supported media formats already exists on the
202 * link, we need to preserve that */
203 if (link->out_formats)
204 ff_formats_changeref(&link->out_formats,
205 &filt->outputs[filt_dstpad_idx]->out_formats);
207 if (link->out_samplerates)
208 ff_formats_changeref(&link->out_samplerates,
209 &filt->outputs[filt_dstpad_idx]->out_samplerates);
210 if (link->out_channel_layouts)
211 ff_channel_layouts_changeref(&link->out_channel_layouts,
212 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
217 int avfilter_config_links(AVFilterContext *filter)
219 int (*config_link)(AVFilterLink *);
223 for (i = 0; i < filter->nb_inputs; i ++) {
224 AVFilterLink *link = filter->inputs[i];
225 AVFilterLink *inlink;
229 inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
230 link->current_pts = AV_NOPTS_VALUE;
232 switch (link->init_state) {
235 case AVLINK_STARTINIT:
236 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
239 link->init_state = AVLINK_STARTINIT;
241 if ((ret = avfilter_config_links(link->src)) < 0)
244 if (!(config_link = link->srcpad->config_props)) {
245 if (link->src->nb_inputs != 1) {
246 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
247 "with more than one input "
248 "must set config_props() "
249 "callbacks on all outputs\n");
250 return AVERROR(EINVAL);
252 } else if ((ret = config_link(link)) < 0) {
253 av_log(link->src, AV_LOG_ERROR,
254 "Failed to configure output pad on %s\n",
259 switch (link->type) {
260 case AVMEDIA_TYPE_VIDEO:
261 if (!link->time_base.num && !link->time_base.den)
262 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
264 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
265 link->sample_aspect_ratio = inlink ?
266 inlink->sample_aspect_ratio : (AVRational){1,1};
268 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
269 link->frame_rate = inlink->frame_rate;
276 } else if (!link->w || !link->h) {
277 av_log(link->src, AV_LOG_ERROR,
278 "Video source filters must set their output link's "
279 "width and height\n");
280 return AVERROR(EINVAL);
284 case AVMEDIA_TYPE_AUDIO:
286 if (!link->time_base.num && !link->time_base.den)
287 link->time_base = inlink->time_base;
290 if (!link->time_base.num && !link->time_base.den)
291 link->time_base = (AVRational) {1, link->sample_rate};
294 if ((config_link = link->dstpad->config_props))
295 if ((ret = config_link(link)) < 0) {
296 av_log(link->src, AV_LOG_ERROR,
297 "Failed to configure input pad on %s\n",
302 link->init_state = AVLINK_INIT;
309 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
311 if (link->type == AVMEDIA_TYPE_VIDEO) {
313 "link[%p s:%dx%d fmt:%s %s->%s]%s",
314 link, link->w, link->h,
315 av_get_pix_fmt_name(link->format),
316 link->src ? link->src->filter->name : "",
317 link->dst ? link->dst->filter->name : "",
321 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
324 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
325 link, (int)link->sample_rate, buf,
326 av_get_sample_fmt_name(link->format),
327 link->src ? link->src->filter->name : "",
328 link->dst ? link->dst->filter->name : "",
333 int ff_request_frame(AVFilterLink *link)
336 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
340 if (link->srcpad->request_frame)
341 ret = link->srcpad->request_frame(link);
342 else if (link->src->inputs[0])
343 ret = ff_request_frame(link->src->inputs[0]);
344 if (ret == AVERROR_EOF && link->partial_buf) {
345 AVFilterBufferRef *pbuf = link->partial_buf;
346 link->partial_buf = NULL;
347 ff_filter_frame_framed(link, pbuf);
350 if (ret == AVERROR_EOF)
355 int ff_poll_frame(AVFilterLink *link)
357 int i, min = INT_MAX;
359 if (link->srcpad->poll_frame)
360 return link->srcpad->poll_frame(link);
362 for (i = 0; i < link->src->nb_inputs; i++) {
364 if (!link->src->inputs[i])
366 val = ff_poll_frame(link->src->inputs[i]);
367 min = FFMIN(min, val);
373 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
375 if (pts == AV_NOPTS_VALUE)
377 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
378 /* TODO use duration */
379 if (link->graph && link->age_index >= 0)
380 ff_avfilter_graph_update_heap(link->graph, link);
383 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
385 if(!strcmp(cmd, "ping")){
386 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
388 }else if(filter->filter->process_command) {
389 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
391 return AVERROR(ENOSYS);
394 #define MAX_REGISTERED_AVFILTERS_NB 128
396 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
398 static int next_registered_avfilter_idx = 0;
400 AVFilter *avfilter_get_by_name(const char *name)
404 for (i = 0; registered_avfilters[i]; i++)
405 if (!strcmp(registered_avfilters[i]->name, name))
406 return registered_avfilters[i];
411 int avfilter_register(AVFilter *filter)
415 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
416 av_log(NULL, AV_LOG_ERROR,
417 "Maximum number of registered filters %d reached, "
418 "impossible to register filter with name '%s'\n",
419 MAX_REGISTERED_AVFILTERS_NB, filter->name);
420 return AVERROR(ENOMEM);
423 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
424 const AVFilterPad *input = &filter->inputs[i];
425 av_assert0( !input->filter_frame
426 || (!input->start_frame && !input->end_frame));
429 registered_avfilters[next_registered_avfilter_idx++] = filter;
433 AVFilter **av_filter_next(AVFilter **filter)
435 return filter ? ++filter : ®istered_avfilters[0];
438 void avfilter_uninit(void)
440 memset(registered_avfilters, 0, sizeof(registered_avfilters));
441 next_registered_avfilter_idx = 0;
444 static int pad_count(const AVFilterPad *pads)
451 for(count = 0; pads->name; count ++) pads ++;
455 static const char *default_filter_name(void *filter_ctx)
457 AVFilterContext *ctx = filter_ctx;
458 return ctx->name ? ctx->name : ctx->filter->name;
461 static void *filter_child_next(void *obj, void *prev)
463 AVFilterContext *ctx = obj;
464 if (!prev && ctx->filter && ctx->filter->priv_class)
469 static const AVClass *filter_child_class_next(const AVClass *prev)
471 AVFilter **filter_ptr = NULL;
473 /* find the filter that corresponds to prev */
474 while (prev && *(filter_ptr = av_filter_next(filter_ptr)))
475 if ((*filter_ptr)->priv_class == prev)
478 /* could not find filter corresponding to prev */
479 if (prev && !(*filter_ptr))
482 /* find next filter with specific options */
483 while (*(filter_ptr = av_filter_next(filter_ptr)))
484 if ((*filter_ptr)->priv_class)
485 return (*filter_ptr)->priv_class;
489 static const AVClass avfilter_class = {
490 .class_name = "AVFilter",
491 .item_name = default_filter_name,
492 .version = LIBAVUTIL_VERSION_INT,
493 .category = AV_CLASS_CATEGORY_FILTER,
494 .child_next = filter_child_next,
495 .child_class_next = filter_child_class_next,
498 const AVClass *avfilter_get_class(void)
500 return &avfilter_class;
503 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
505 AVFilterContext *ret;
509 return AVERROR(EINVAL);
511 ret = av_mallocz(sizeof(AVFilterContext));
513 return AVERROR(ENOMEM);
515 ret->av_class = &avfilter_class;
516 ret->filter = filter;
517 ret->name = inst_name ? av_strdup(inst_name) : NULL;
518 if (filter->priv_size) {
519 ret->priv = av_mallocz(filter->priv_size);
524 ret->nb_inputs = pad_count(filter->inputs);
525 if (ret->nb_inputs ) {
526 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
527 if (!ret->input_pads)
529 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
530 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
535 ret->nb_outputs = pad_count(filter->outputs);
536 if (ret->nb_outputs) {
537 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
538 if (!ret->output_pads)
540 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
541 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
546 ret->output_count = ret->nb_outputs;
547 ret->input_count = ret->nb_inputs;
554 av_freep(&ret->inputs);
555 av_freep(&ret->input_pads);
557 av_freep(&ret->outputs);
558 av_freep(&ret->output_pads);
560 av_freep(&ret->priv);
562 return AVERROR(ENOMEM);
565 void avfilter_free(AVFilterContext *filter)
573 if (filter->filter->uninit)
574 filter->filter->uninit(filter);
576 for (i = 0; i < filter->nb_inputs; i++) {
577 if ((link = filter->inputs[i])) {
579 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
580 ff_formats_unref(&link->in_formats);
581 ff_formats_unref(&link->out_formats);
582 ff_formats_unref(&link->in_samplerates);
583 ff_formats_unref(&link->out_samplerates);
584 ff_channel_layouts_unref(&link->in_channel_layouts);
585 ff_channel_layouts_unref(&link->out_channel_layouts);
587 avfilter_link_free(&link);
589 for (i = 0; i < filter->nb_outputs; i++) {
590 if ((link = filter->outputs[i])) {
592 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
593 ff_formats_unref(&link->in_formats);
594 ff_formats_unref(&link->out_formats);
595 ff_formats_unref(&link->in_samplerates);
596 ff_formats_unref(&link->out_samplerates);
597 ff_channel_layouts_unref(&link->in_channel_layouts);
598 ff_channel_layouts_unref(&link->out_channel_layouts);
600 avfilter_link_free(&link);
603 av_freep(&filter->name);
604 av_freep(&filter->input_pads);
605 av_freep(&filter->output_pads);
606 av_freep(&filter->inputs);
607 av_freep(&filter->outputs);
608 av_freep(&filter->priv);
609 while(filter->command_queue){
610 ff_command_queue_pop(filter);
615 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
619 if (filter->filter->init_opaque)
620 ret = filter->filter->init_opaque(filter, args, opaque);
621 else if (filter->filter->init)
622 ret = filter->filter->init(filter, args);
626 const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx)
628 return pads[pad_idx].name;
631 enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx)
633 return pads[pad_idx].type;
636 static int default_filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
638 return ff_filter_frame(link->dst->outputs[0], frame);
641 static int ff_filter_frame_framed(AVFilterLink *link, AVFilterBufferRef *frame)
643 int (*filter_frame)(AVFilterLink *, AVFilterBufferRef *);
644 AVFilterPad *src = link->srcpad;
645 AVFilterPad *dst = link->dstpad;
646 AVFilterBufferRef *out;
648 AVFilterCommand *cmd= link->dst->command_queue;
652 avfilter_unref_buffer(frame);
656 if (!(filter_frame = dst->filter_frame))
657 filter_frame = default_filter_frame;
659 av_assert1((frame->perms & src->min_perms) == src->min_perms);
660 frame->perms &= ~ src->rej_perms;
661 perms = frame->perms;
663 if (frame->linesize[0] < 0)
664 perms |= AV_PERM_NEG_LINESIZES;
666 /* prepare to copy the frame if the buffer has insufficient permissions */
667 if ((dst->min_perms & perms) != dst->min_perms ||
668 dst->rej_perms & perms) {
669 av_log(link->dst, AV_LOG_DEBUG,
670 "Copying data in avfilter (have perms %x, need %x, reject %x)\n",
671 perms, link->dstpad->min_perms, link->dstpad->rej_perms);
673 /* Maybe use ff_copy_buffer_ref instead? */
674 switch (link->type) {
675 case AVMEDIA_TYPE_VIDEO:
676 out = ff_get_video_buffer(link, dst->min_perms,
679 case AVMEDIA_TYPE_AUDIO:
680 out = ff_get_audio_buffer(link, dst->min_perms,
681 frame->audio->nb_samples);
683 default: return AVERROR(EINVAL);
686 avfilter_unref_buffer(frame);
687 return AVERROR(ENOMEM);
689 avfilter_copy_buffer_ref_props(out, frame);
691 switch (link->type) {
692 case AVMEDIA_TYPE_VIDEO:
693 av_image_copy(out->data, out->linesize, frame->data, frame->linesize,
694 frame->format, frame->video->w, frame->video->h);
696 case AVMEDIA_TYPE_AUDIO:
697 av_samples_copy(out->extended_data, frame->extended_data,
698 0, 0, frame->audio->nb_samples,
699 av_get_channel_layout_nb_channels(frame->audio->channel_layout),
702 default: return AVERROR(EINVAL);
705 avfilter_unref_buffer(frame);
709 while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
710 av_log(link->dst, AV_LOG_DEBUG,
711 "Processing command time:%f command:%s arg:%s\n",
712 cmd->time, cmd->command, cmd->arg);
713 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
714 ff_command_queue_pop(link->dst);
715 cmd= link->dst->command_queue;
719 ret = filter_frame(link, out);
720 ff_update_link_current_pts(link, pts);
724 static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFilterBufferRef *frame)
726 int insamples = frame->audio->nb_samples, inpos = 0, nb_samples;
727 AVFilterBufferRef *pbuf = link->partial_buf;
728 int nb_channels = frame->audio->channels;
731 /* Handle framing (min_samples, max_samples) */
734 AVRational samples_tb = { 1, link->sample_rate };
735 int perms = link->dstpad->min_perms | AV_PERM_WRITE;
736 pbuf = ff_get_audio_buffer(link, perms, link->partial_buf_size);
738 av_log(link->dst, AV_LOG_WARNING,
739 "Samples dropped due to memory allocation failure.\n");
742 avfilter_copy_buffer_ref_props(pbuf, frame);
743 pbuf->pts = frame->pts +
744 av_rescale_q(inpos, samples_tb, link->time_base);
745 pbuf->audio->nb_samples = 0;
747 nb_samples = FFMIN(insamples,
748 link->partial_buf_size - pbuf->audio->nb_samples);
749 av_samples_copy(pbuf->extended_data, frame->extended_data,
750 pbuf->audio->nb_samples, inpos,
751 nb_samples, nb_channels, link->format);
753 insamples -= nb_samples;
754 pbuf->audio->nb_samples += nb_samples;
755 if (pbuf->audio->nb_samples >= link->min_samples) {
756 ret = ff_filter_frame_framed(link, pbuf);
760 avfilter_unref_buffer(frame);
761 link->partial_buf = pbuf;
765 int ff_filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
767 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
769 /* Consistency checks */
770 if (link->type == AVMEDIA_TYPE_VIDEO) {
771 if (strcmp(link->dst->filter->name, "scale")) {
772 av_assert1(frame->format == link->format);
773 av_assert1(frame->video->w == link->w);
774 av_assert1(frame->video->h == link->h);
777 av_assert1(frame->format == link->format);
778 av_assert1(frame->audio->channels == link->channels);
779 av_assert1(frame->audio->channel_layout == link->channel_layout);
780 av_assert1(frame->audio->sample_rate == link->sample_rate);
783 /* Go directly to actual filtering if possible */
784 if (link->type == AVMEDIA_TYPE_AUDIO &&
786 (link->partial_buf ||
787 frame->audio->nb_samples < link->min_samples ||
788 frame->audio->nb_samples > link->max_samples)) {
789 return ff_filter_frame_needs_framing(link, frame);
791 return ff_filter_frame_framed(link, frame);