Buffer sink API

Files
file	buffersink.h
	memory buffer sink API

Functions
int	av_buffersink_get_frame (AVFilterContext *ctx, AVFrame *frame)
	Get a frame with filtered data from sink and put it in frame. More...
int	av_buffersink_get_samples (AVFilterContext *ctx, AVFrame *frame, int nb_samples)
	Same as av_buffersink_get_frame(), but with the ability to specify the number of samples read. More...

Detailed Description

Function Documentation

int av_buffersink_get_frame	(	AVFilterContext *	ctx,
		AVFrame *	frame
	)

Get a frame with filtered data from sink and put it in frame.

Parameters

ctx	pointer to a context of a buffersink or abuffersink AVFilter.
frame	pointer to an allocated frame that will be filled with data. The data must be freed using av_frame_unref() / av_frame_free()

Returns

• >= 0 if a frame was successfully returned.
• AVERROR(EAGAIN) if no frames are available at this point; more input frames must be added to the filtergraph to get more output.
• AVERROR_EOF if there will be no more output frames on this sink.
• A different negative AVERROR code in other failure cases.

Definition at line 62 of file buffersink.c.

Referenced by main(), poll_filter(), and video_thread().

int av_buffersink_get_samples	(	AVFilterContext *	ctx,
		AVFrame *	frame,
		int	nb_samples
	)

Same as av_buffersink_get_frame(), but with the ability to specify the number of samples read.

This function is less efficient than av_buffersink_get_frame(), because it copies the data around.

Parameters

ctx	pointer to a context of the abuffersink AVFilter.
frame	pointer to an allocated frame that will be filled with data. The data must be freed using av_frame_unref() / av_frame_free() frame will contain exactly nb_samples audio samples, except at the end of stream, when it can contain less than nb_samples.

Returns

The return codes have the same meaning as for av_buffersink_get_samples().

Warning

do not mix this function with av_buffersink_get_frame(). Use only one or the other with a single sink, not both.

Definition at line 102 of file buffersink.c.

Referenced by poll_filter().