libavfilter/buffersrc.h File Reference

Memory buffer source API. More...

#include "libavcodec/avcodec.h"
#include "avfilter.h"

Go to the source code of this file.

Enumerations
enum	{ AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1, AV_BUFFERSRC_FLAG_NO_COPY = 2, AV_BUFFERSRC_FLAG_PUSH = 4 }
Functions
int	av_buffersrc_add_ref (AVFilterContext *buffer_src, AVFilterBufferRef *picref, int flags)
	Add buffer data in picref to buffer_src.
unsigned	av_buffersrc_get_nb_failed_requests (AVFilterContext *buffer_src)
	Get the number of failed requests.
attribute_deprecated int	av_buffersrc_buffer (AVFilterContext *s, AVFilterBufferRef *buf)
	Add a buffer to the filtergraph s.
int	av_buffersrc_write_frame (AVFilterContext *s, const AVFrame *frame)
	Add a frame to the buffer source.

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Detailed Description

Memory buffer source API.

Definition in file buffersrc.h.

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Enumeration Type Documentation

anonymous enum

Enumerator:

AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT	Do not check for format changes.
AV_BUFFERSRC_FLAG_NO_COPY	Do not copy buffer data.
AV_BUFFERSRC_FLAG_PUSH	Immediately push the frame to the output.

Definition at line 31 of file buffersrc.h.

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Function Documentation

int av_buffersrc_add_ref	(	AVFilterContext *	buffer_src,
		AVFilterBufferRef *	picref,
		int	flags
	)

Add buffer data in picref to buffer_src.

Parameters:

	buffer_src	pointer to a buffer source context
	picref	a buffer reference, or NULL to mark EOF
	flags	a combination of AV_BUFFERSRC_FLAG_*

Returns:

>= 0 in case of success, a negative AVERROR code in case of failure

Definition at line 102 of file buffersrc.c.

Referenced by av_asrc_buffer_add_audio_buffer_ref(), av_buffersrc_add_frame(), av_buffersrc_buffer(), decode_audio(), decode_video(), sub2video_flush(), sub2video_push_ref(), and video_thread().

attribute_deprecated int av_buffersrc_buffer	(	AVFilterContext *	s,
		AVFilterBufferRef *	buf
	)

Add a buffer to the filtergraph s.

Parameters:

buf

buffer containing frame data to be passed down the filtergraph. This function will take ownership of buf, the user must not free it. A NULL buf signals EOF -- i.e. no more frames will be sent to this filter.

Deprecated:

Use av_buffersrc_add_ref(s, picref, AV_BUFFERSRC_FLAG_NO_COPY) instead.

Definition at line 159 of file buffersrc.c.

unsigned av_buffersrc_get_nb_failed_requests

(

AVFilterContext *

buffer_src

)

Get the number of failed requests.

A failed request is when the request_frame method is called while no frame is present in the buffer. The number is reset when a frame is added.

Definition at line 165 of file buffersrc.c.

Referenced by sub2video_heartbeat(), and transcode_from_filter().

int av_buffersrc_write_frame	(	AVFilterContext *	s,
		const AVFrame *	frame
	)

Add a frame to the buffer source.

Parameters:

	s	an instance of the buffersrc filter.
	frame	frame to be added.

Warning:

frame data will be memcpy()ed, which may be a big performance hit. Use av_buffersrc_buffer() to avoid copying the data.

Definition at line 97 of file buffersrc.c.

Referenced by video_thread().