libavfilter/audio.h File Reference

#include "avfilter.h"

Go to the source code of this file.

Functions
AVFilterBufferRef *	ff_default_get_audio_buffer (AVFilterLink *link, int perms, int nb_samples)
	default handler for get_audio_buffer() for audio inputs
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_get_audio_buffer (AVFilterLink *link, int perms, int nb_samples)
	Request an audio samples buffer with a specific set of permissions.
void	ff_default_filter_samples (AVFilterLink *link, AVFilterBufferRef *samplesref)
	default handler for filter_samples() for audio inputs
void	ff_null_filter_samples (AVFilterLink *link, AVFilterBufferRef *samplesref)
	filter_samples() handler for filters which simply pass audio along
void	ff_filter_samples (AVFilterLink *link, AVFilterBufferRef *samplesref)
	Send a buffer of audio samples to the next filter.
Variables
static enum AVSampleFormat	ff_packed_sample_fmts []
static enum AVSampleFormat	ff_planar_sample_fmts []

---

Function Documentation

void ff_default_filter_samples	(	AVFilterLink *	link,
		AVFilterBufferRef *	samplesref
	)

default handler for filter_samples() for audio inputs

Definition at line 159 of file audio.c.

Referenced by ff_filter_samples().

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 35 of file audio.c.

Referenced by ff_default_filter_samples(), ff_filter_samples(), and ff_get_audio_buffer().

void 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.

Definition at line 179 of file audio.c.

Referenced by ff_default_filter_samples(), ff_null_filter_samples(), filter_samples(), output_frame(), request_frame(), and send_out().

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 66 of file audio.c.

Referenced by copy_buffer_ref(), ff_null_get_audio_buffer(), filter_samples(), output_frame(), read_from_fifo(), and request_frame().

void ff_null_filter_samples	(	AVFilterLink *	link,
		AVFilterBufferRef *	samplesref
	)

filter_samples() handler for filters which simply pass audio along

Definition at line 153 of file audio.c.

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 29 of file audio.c.

---

Variable Documentation

enum AVSampleFormat ff_packed_sample_fmts[] [static]

Initial value:

 {
    AV_SAMPLE_FMT_U8,
    AV_SAMPLE_FMT_S16,
    AV_SAMPLE_FMT_S32,
    AV_SAMPLE_FMT_FLT,
    AV_SAMPLE_FMT_DBL,
    AV_SAMPLE_FMT_NONE
}

Definition at line 27 of file audio.h.

Referenced by query_formats().

enum AVSampleFormat ff_planar_sample_fmts[] [static]

Initial value:

 {
    AV_SAMPLE_FMT_U8P,
    AV_SAMPLE_FMT_S16P,
    AV_SAMPLE_FMT_S32P,
    AV_SAMPLE_FMT_FLTP,
    AV_SAMPLE_FMT_DBLP,
    AV_SAMPLE_FMT_NONE
}

Definition at line 36 of file audio.h.