memory buffer sink API for audio and video More...

#include "avfilter.h"

Data Structures
struct	AVBufferSinkParams
	Struct to use for initializing a buffersink context. More...

struct	AVABufferSinkParams
	Struct to use for initializing an abuffersink context. More...

Macros
#define	AV_BUFFERSINK_FLAG_PEEK 1
	Tell av_buffersink_get_buffer_ref() to read video/samples buffer reference, but not remove it from the buffer.

#define	AV_BUFFERSINK_FLAG_NO_REQUEST 2
	Tell av_buffersink_get_buffer_ref() not to request a frame from its input.

Functions
AVBufferSinkParams *	av_buffersink_params_alloc (void)
	Create an AVBufferSinkParams structure.

AVABufferSinkParams *	av_abuffersink_params_alloc (void)
	Create an AVABufferSinkParams structure.

void	av_buffersink_set_frame_size (AVFilterContext *ctx, unsigned frame_size)
	Set the frame size for an audio buffer sink.

int	av_buffersink_get_buffer_ref (AVFilterContext buffer_sink, AVFilterBufferRef *bufref, int flags)
	Get an audio/video buffer data from buffer_sink and put it in bufref.

int	av_buffersink_poll_frame (AVFilterContext *ctx)
	Get the number of immediately available frames.

AVRational	av_buffersink_get_frame_rate (AVFilterContext *ctx)
	Get the frame rate of the input.

int	av_buffersink_read (AVFilterContext ctx, AVFilterBufferRef *buf)
	Get a buffer with filtered data from sink and put it in buf.

int	av_buffersink_read_samples (AVFilterContext ctx, AVFilterBufferRef *buf, int nb_samples)
	Same as av_buffersink_read, but with the ability to specify the number of samples read.

Detailed Description

memory buffer sink API for audio and video

Definition in file buffersink.h.

Macro Definition Documentation

#define AV_BUFFERSINK_FLAG_PEEK 1

Tell av_buffersink_get_buffer_ref() to read video/samples buffer reference, but not remove it from the buffer.

This is useful if you need only to read a video/samples buffer, without to fetch it.

Definition at line 75 of file buffersink.h.

Referenced by av_buffersink_get_buffer_ref(), av_buffersink_read(), av_buffersink_read_samples(), and lavfi_read_packet().

#define AV_BUFFERSINK_FLAG_NO_REQUEST 2

Tell av_buffersink_get_buffer_ref() not to request a frame from its input.

If a frame is already buffered, it is read (and removed from the buffer), but if no frame is present, return AVERROR(EAGAIN).

Definition at line 82 of file buffersink.h.

Referenced by av_buffersink_get_buffer_ref(), and reap_filters().

Function Documentation

AVBufferSinkParams* av_buffersink_params_alloc ( void )

Create an AVBufferSinkParams structure.

Must be freed with av_free().

Examples:: doc/examples/filtering_video.c.

Definition at line 34 of file sink_buffer.c.

Referenced by configure_output_video_filter(), init_filters(), and lavfi_read_header().

AVABufferSinkParams* av_abuffersink_params_alloc ( void )

Create an AVABufferSinkParams structure.

Must be freed with av_free().

Examples:: doc/examples/filtering_audio.c.

Definition at line 45 of file sink_buffer.c.

Referenced by configure_output_audio_filter(), init_filters(), and lavfi_read_header().

void av_buffersink_set_frame_size	(	AVFilterContext *	ctx,
		unsigned	frame_size
	)

Set the frame size for an audio buffer sink.

All calls to av_buffersink_get_buffer_ref will return a buffer with exactly the specified number of samples, or AVERROR(EAGAIN) if there is not enough. The last buffer at EOF will be padded with 0.

Definition at line 136 of file sink_buffer.c.

Referenced by decode_audio(), and transcode_init().