audio.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/cpu.h"
#include "libavutil/eval.h"
#include "audio.h"
#include "avfilter.h"
#include "avfilter_internal.h"
#include "filters.h"
#include "framepool.h"

Go to the source code of this file.

Functions
AVFrame *	ff_null_get_audio_buffer (AVFilterLink *link, int nb_samples)
	get_audio_buffer() handler for filters which simply pass audio along More...
AVFrame *	ff_default_get_audio_buffer (AVFilterLink *link, int nb_samples)
	default handler for get_audio_buffer() for audio inputs More...
AVFrame *	ff_get_audio_buffer (AVFilterLink *link, int nb_samples)
	Request an audio samples buffer with a specific set of permissions. More...
int	ff_parse_sample_rate (int *ret, const char *arg, void *log_ctx)
	Parse a sample rate. More...
int	ff_parse_channel_layout (AVChannelLayout *ret, int *nret, const char *arg, void *log_ctx)
	Parse a channel layout or a corresponding integer representation. More...

Variables
const AVFilterPad	ff_audio_default_filterpad [1]
	An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_AUDIO. More...

Function Documentation

ff_null_get_audio_buffer()

AVFrame* ff_null_get_audio_buffer	(	AVFilterLink *	link,
		int	nb_samples
	)

get_audio_buffer() handler for filters which simply pass audio along

Definition at line 41 of file audio.c.

Referenced by init().

ff_default_get_audio_buffer()

AVFrame* ff_default_get_audio_buffer	(	AVFilterLink *	link,
		int	nb_samples
	)

default handler for get_audio_buffer() for audio inputs

Definition at line 46 of file audio.c.

Referenced by ff_get_audio_buffer(), and get_buffer().

ff_get_audio_buffer()

AVFrame* ff_get_audio_buffer	(	AVFilterLink *	link,
		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
nb_samples	the number of samples per channel

Returns

on success an AVFrame owned by the caller, NULL on error

Definition at line 98 of file audio.c.

Referenced by activate(), analyze_frame(), audio_frame(), compand_delay(), compand_drain(), compand_nodelay(), config_filter(), config_input(), config_output(), convert_coeffs(), ff_inlink_make_frame_writable(), ff_null_get_audio_buffer(), filter_frame(), fir_frame(), flush_buffer(), flush_frame(), get_audio_buffer(), headphone_frame(), init_segment(), output_frame(), push_frame(), request_frame(), send_silence(), spatial_activate(), take_samples(), and try_push_frame().

ff_parse_sample_rate()

int ff_parse_sample_rate	(	int *	ret,
		const char *	arg,
		void *	log_ctx
	)

Parse a sample rate.

Parameters

ret	unsigned integer pointer to where the value should be written
arg	string to parse
log_ctx	log context

Returns

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

Definition at line 111 of file audio.c.

Referenced by init().

ff_parse_channel_layout()

int ff_parse_channel_layout	(	AVChannelLayout *	ret,
		int *	nret,
		const char *	arg,
		void *	log_ctx
	)

Parse a channel layout or a corresponding integer representation.

Parameters

ret	64bit integer pointer to where the value should be written.
nret	integer pointer to the number of channels; if not NULL, then unknown channel layouts are accepted
arg	string to parse
log_ctx	log context

Returns

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

Definition at line 123 of file audio.c.

Referenced by init(), and main().

Variable Documentation

ff_audio_default_filterpad

const AVFilterPad ff_audio_default_filterpad[1]

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_AUDIO,
    }
}

An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_AUDIO.

Definition at line 34 of file audio.c.