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

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

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 74 of file audio.c.

Referenced by activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), activate(), analyze_frame(), audio_frame(), compand_delay(), compand_drain(), compand_nodelay(), config_filter(), config_filter(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), config_output(), convert_coeffs(), ff_inlink_make_frame_writable(), ff_null_get_audio_buffer(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), filter_frame(), fir_frame(), flush_buffer(), flush_frame(), flush_frame(), get_audio_buffer(), headphone_frame(), init_segment(), output_frame(), output_frame(), push_frame(), push_last_frame(), request_frame(), request_frame(), request_frame(), request_frame(), request_frame(), request_frame(), request_frame(), send_silence(), spatial_activate(), take_samples(), try_push_frame(), 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 87 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 99 of file audio.c.

Referenced by init(), 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.