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buffersink: Implement a poll function. 

With this the application can find out how many frames are available.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-06 17:02:15 +01:00
parent fab97adb66
commit a502939d64
3 changed files with 15 additions and 1 deletions
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2
libavfilter/avfilter.h
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@ -29,7 +29,7 @@
#include "libavutil/rational.h"
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 51
#define LIBAVFILTER_VERSION_MINOR 52
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

6
libavfilter/buffersink.h
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@ -76,6 +76,12 @@ AVABufferSinkParams *av_abuffersink_params_alloc(void);
int av_buffersink_get_buffer_ref(AVFilterContext *buffer_sink,
AVFilterBufferRef **bufref, int flags);
/**
* Get the number of immediately available frames.
*/
int av_buffersink_poll_frame(AVFilterContext *ctx);
#if FF_API_OLD_VSINK_API
/**
* @deprecated Use av_buffersink_get_buffer_ref() instead.

8
libavfilter/sink_buffer.c
View File

@ -140,6 +140,14 @@ int av_buffersink_get_buffer_ref(AVFilterContext *ctx,
return 0;
}
int av_buffersink_poll_frame(AVFilterContext *ctx)
{
BufferSinkContext *buf = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
return av_fifo_size(buf->fifo)/sizeof(AVFilterBufferRef *) + avfilter_poll_frame(inlink);
}
#if FF_API_OLD_VSINK_API
int av_vsink_buffer_get_video_buffer_ref(AVFilterContext *ctx,
AVFilterBufferRef **picref, int flags)