libavutil/audioconvert.c File Reference

audio conversion routines More...

#include "avstring.h"
#include "avutil.h"
#include "audioconvert.h"

Go to the source code of this file.

Functions
static const char *	get_channel_name (int channel_id)
int64_t	av_get_channel_layout (const char *name)
	Return a channel layout id that matches name, 0 if no match.
void	av_get_channel_layout_string (char *buf, int buf_size, int nb_channels, int64_t channel_layout)
	Return a description of a channel layout.
int	av_get_channel_layout_nb_channels (int64_t channel_layout)
	Return the number of channels in the channel layout.
Variables
static const char *const	channel_names []
struct {
const char *   name
int   nb_channels
int64_t   layout
}	channel_layout_map []

---

Detailed Description

audio conversion routines

Definition in file audioconvert.c.

---

Function Documentation

int64_t av_get_channel_layout

(

const char *

name

)

Return a channel layout id that matches name, 0 if no match.

Definition at line 65 of file audioconvert.c.

Referenced by avcodec_get_channel_layout(), and init().

int av_get_channel_layout_nb_channels

(

int64_t

channel_layout

)

Return the number of channels in the channel layout.

Definition at line 110 of file audioconvert.c.

Referenced by av_get_channel_layout_string(), avcodec_channel_layout_num_channels(), avcodec_open2(), avfilter_default_get_audio_buffer(), config_props(), read_major_sync(), and transcode().

void av_get_channel_layout_string	(	char *	buf,
		int	buf_size,
		int	nb_channels,
		int64_t	channel_layout
	)

Return a description of a channel layout.

If nb_channels is <= 0, it is guessed from the channel_layout.

Parameters:

	buf	put here the string containing the channel layout
	buf_size	size in bytes of the buffer

Definition at line 77 of file audioconvert.c.

Referenced by avcodec_get_channel_layout_string(), avcodec_string(), config_props(), dprint_options(), ff_alsa_open(), ff_dlog_link(), oggvorbis_init_encoder(), and print_digraph().

static const char* get_channel_name

(

int

channel_id

)

[static]

Definition at line 38 of file audioconvert.c.

Referenced by av_get_channel_layout_string().

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Variable Documentation

struct { ... } channel_layout_map[] [static]

Referenced by av_get_channel_layout(), and av_get_channel_layout_string().

const char* const channel_names[] [static]

Initial value:

 {
    "FL", "FR", "FC", "LFE", "BL",  "BR",  "FLC", "FRC",
    "BC", "SL", "SR", "TC",  "TFL", "TFC", "TFR", "TBL",
    "TBC", "TBR",
    [29] = "DL",
    [30] = "DR",
}

Definition at line 30 of file audioconvert.c.

Referenced by get_channel_name().

int64_t layout

Definition at line 48 of file audioconvert.c.

Referenced by av_get_channel_layout_string(), ff_alsa_open(), ff_truehd_layout(), and mxf_read_pixel_layout().

const char* name

Definition at line 46 of file audioconvert.c.

int nb_channels

Definition at line 47 of file audioconvert.c.

Referenced by avfilter_default_get_audio_buffer(), celt_header(), and main().