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lavfi: implement samples framing on links.

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Links can be set up to group samples into buffers of
specified minimum and maximum size.
This commit is contained in:
Nicolas George
2012-06-30 10:11:22 +02:00
parent c9c4835f51
commit 0689d5e17a
4 changed files with 91 additions and 4 deletions
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14
libavfilter/avfilter.c
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@@ -28,6 +28,7 @@
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "audio.h"
char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
{
@@ -320,13 +321,20 @@ void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
int ff_request_frame(AVFilterLink *link)
{
int ret = -1;
FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
if (link->srcpad->request_frame)
return link->srcpad->request_frame(link);
ret = link->srcpad->request_frame(link);
else if (link->src->inputs[0])
return ff_request_frame(link->src->inputs[0]);
else return -1;
ret = ff_request_frame(link->src->inputs[0]);
if (ret == AVERROR_EOF && link->partial_buf) {
AVFilterBufferRef *pbuf = link->partial_buf;
link->partial_buf = NULL;
ff_filter_samples_framed(link, pbuf);
return 0;
}
return ret;
}
int ff_poll_frame(AVFilterLink *link)