libavfilter/audio.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/audioconvert.h"
#include "libavutil/common.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Functions
AVFilterBufferRef *	ff_null_get_audio_buffer (AVFilterLink *link, int perms, int nb_samples)
	get_audio_buffer() handler for filters which simply pass audio along
AVFilterBufferRef *	ff_default_get_audio_buffer (AVFilterLink *link, int perms, int nb_samples)
	default handler for get_audio_buffer() for audio inputs
AVFilterBufferRef *	ff_get_audio_buffer (AVFilterLink *link, int perms, int nb_samples)
	Request an audio samples buffer with a specific set of permissions.
AVFilterBufferRef *	avfilter_get_audio_buffer_ref_from_arrays (uint8_t **data, int linesize, int perms, int nb_samples, enum AVSampleFormat sample_fmt, uint64_t channel_layout)
	Create an audio buffer reference wrapped around an already allocated samples buffer.
static int	default_filter_samples (AVFilterLink *link, AVFilterBufferRef *samplesref)
int	ff_filter_samples_framed (AVFilterLink *link, AVFilterBufferRef *samplesref)
	Send a buffer of audio samples to the next link, without checking min_samples.
int	ff_filter_samples (AVFilterLink *link, AVFilterBufferRef *samplesref)
	Send a buffer of audio samples to the next filter.

---

Function Documentation

AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays	(	uint8_t **	data,
		int	linesize,
		int	perms,
		int	nb_samples,
		enum AVSampleFormat	sample_fmt,
		uint64_t	channel_layout
	)

Create an audio buffer reference wrapped around an already allocated samples buffer.

Parameters:

	data	pointers to the samples plane buffers
	linesize	linesize for the samples plane buffers
	perms	the required access permissions
	nb_samples	number of samples per channel
	sample_fmt	the format of each sample in the buffer to allocate
	channel_layout	the channel layout of the buffer

Definition at line 90 of file audio.c.

Referenced by av_asrc_buffer_add_samples(), avfilter_get_audio_buffer_ref_from_frame(), ff_default_get_audio_buffer(), and join_request_frame().

static int default_filter_samples	(	AVFilterLink *	link,
		AVFilterBufferRef *	samplesref
	)			[static]

Definition at line 160 of file audio.c.

Referenced by ff_filter_samples_framed().

AVFilterBufferRef* ff_default_get_audio_buffer	(	AVFilterLink *	link,
		int	perms,
		int	nb_samples
	)

default handler for get_audio_buffer() for audio inputs

Definition at line 36 of file audio.c.

Referenced by ff_filter_samples_framed(), and ff_get_audio_buffer().

int ff_filter_samples	(	AVFilterLink *	link,
		AVFilterBufferRef *	samplesref
	)

Send a buffer of audio samples to the next filter.

Parameters:

	link	the output link over which the audio samples are being sent
	samplesref	a reference to the buffer of audio samples being sent. The receiving filter will free this reference when it no longer needs it or pass it on to the next filter.

Returns:

>= 0 on success, a negative AVERROR on error. The receiving filter is responsible for unreferencing samplesref in case of error.

Definition at line 221 of file audio.c.

Referenced by channelmap_filter_samples(), default_filter_samples(), filter_frame(), filter_samples(), join_request_frame(), movie_push_frame(), output_frame(), process_frame(), push_samples(), request_frame(), return_audio_frame(), send_out(), and send_silence().

int ff_filter_samples_framed	(	AVFilterLink *	link,
		AVFilterBufferRef *	samplesref
	)

Send a buffer of audio samples to the next link, without checking min_samples.

Definition at line 166 of file audio.c.

Referenced by ff_filter_samples(), and ff_request_frame().

AVFilterBufferRef* ff_get_audio_buffer	(	AVFilterLink *	link,
		int	perms,
		int	nb_samples
	)

Request an audio samples buffer with a specific set of permissions.

Parameters:

	link	the output link to the filter from which the buffer will be requested
	perms	the required access permissions
	nb_samples	the number of samples per channel

Returns:

A reference to the samples. This must be unreferenced with avfilter_unref_buffer when you are finished with it.

Definition at line 73 of file audio.c.

Referenced by av_buffersink_read_samples(), ff_copy_buffer_ref(), ff_filter_samples(), ff_null_get_audio_buffer(), filter_samples(), get_audio_buffer(), output_frame(), push_samples(), read_from_fifo(), request_frame(), return_audio_frame(), and send_silence().

AVFilterBufferRef* ff_null_get_audio_buffer	(	AVFilterLink *	link,
		int	perms,
		int	nb_samples
	)

get_audio_buffer() handler for filters which simply pass audio along

Definition at line 30 of file audio.c.