FFmpeg: libavutil/channel_layout.h File Reference

audio channel layout utility functions More...

#include <stdint.h>

Macros
#define	AV_CH_FRONT_LEFT 0x00000001

#define	AV_CH_FRONT_RIGHT 0x00000002

#define	AV_CH_FRONT_CENTER 0x00000004

#define	AV_CH_LOW_FREQUENCY 0x00000008

#define	AV_CH_BACK_LEFT 0x00000010

#define	AV_CH_BACK_RIGHT 0x00000020

#define	AV_CH_FRONT_LEFT_OF_CENTER 0x00000040

#define	AV_CH_FRONT_RIGHT_OF_CENTER 0x00000080

#define	AV_CH_BACK_CENTER 0x00000100

#define	AV_CH_SIDE_LEFT 0x00000200

#define	AV_CH_SIDE_RIGHT 0x00000400

#define	AV_CH_TOP_CENTER 0x00000800

#define	AV_CH_TOP_FRONT_LEFT 0x00001000

#define	AV_CH_TOP_FRONT_CENTER 0x00002000

#define	AV_CH_TOP_FRONT_RIGHT 0x00004000

#define	AV_CH_TOP_BACK_LEFT 0x00008000

#define	AV_CH_TOP_BACK_CENTER 0x00010000

#define	AV_CH_TOP_BACK_RIGHT 0x00020000

#define	AV_CH_STEREO_LEFT 0x20000000
	Stereo downmix.

#define	AV_CH_STEREO_RIGHT 0x40000000
	See AV_CH_STEREO_LEFT.

#define	AV_CH_WIDE_LEFT 0x0000000080000000ULL

#define	AV_CH_WIDE_RIGHT 0x0000000100000000ULL

#define	AV_CH_SURROUND_DIRECT_LEFT 0x0000000200000000ULL

#define	AV_CH_SURROUND_DIRECT_RIGHT 0x0000000400000000ULL

#define	AV_CH_LOW_FREQUENCY_2 0x0000000800000000ULL

#define	AV_CH_LAYOUT_NATIVE 0x8000000000000000ULL
	Channel mask value used for AVCodecContext.request_channel_layout to indicate that the user requests the channel order of the decoder output to be the native codec channel order.

#define	AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER)

#define	AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT\|AV_CH_FRONT_RIGHT)

#define	AV_CH_LAYOUT_2POINT1 (AV_CH_LAYOUT_STEREO\|AV_CH_LOW_FREQUENCY)

#define	AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO\|AV_CH_BACK_CENTER)

#define	AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO\|AV_CH_FRONT_CENTER)

#define	AV_CH_LAYOUT_3POINT1 (AV_CH_LAYOUT_SURROUND\|AV_CH_LOW_FREQUENCY)

#define	AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND\|AV_CH_BACK_CENTER)

#define	AV_CH_LAYOUT_4POINT1 (AV_CH_LAYOUT_4POINT0\|AV_CH_LOW_FREQUENCY)

#define	AV_CH_LAYOUT_2_2 (AV_CH_LAYOUT_STEREO\|AV_CH_SIDE_LEFT\|AV_CH_SIDE_RIGHT)

#define	AV_CH_LAYOUT_QUAD (AV_CH_LAYOUT_STEREO\|AV_CH_BACK_LEFT\|AV_CH_BACK_RIGHT)

#define	AV_CH_LAYOUT_5POINT0 (AV_CH_LAYOUT_SURROUND\|AV_CH_SIDE_LEFT\|AV_CH_SIDE_RIGHT)

#define	AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0\|AV_CH_LOW_FREQUENCY)

#define	AV_CH_LAYOUT_5POINT0_BACK (AV_CH_LAYOUT_SURROUND\|AV_CH_BACK_LEFT\|AV_CH_BACK_RIGHT)

#define	AV_CH_LAYOUT_5POINT1_BACK (AV_CH_LAYOUT_5POINT0_BACK\|AV_CH_LOW_FREQUENCY)

#define	AV_CH_LAYOUT_6POINT0 (AV_CH_LAYOUT_5POINT0\|AV_CH_BACK_CENTER)

#define	AV_CH_LAYOUT_6POINT0_FRONT (AV_CH_LAYOUT_2_2\|AV_CH_FRONT_LEFT_OF_CENTER\|AV_CH_FRONT_RIGHT_OF_CENTER)

#define	AV_CH_LAYOUT_HEXAGONAL (AV_CH_LAYOUT_5POINT0_BACK\|AV_CH_BACK_CENTER)

#define	AV_CH_LAYOUT_6POINT1 (AV_CH_LAYOUT_5POINT1\|AV_CH_BACK_CENTER)

#define	AV_CH_LAYOUT_6POINT1_BACK (AV_CH_LAYOUT_5POINT1_BACK\|AV_CH_BACK_CENTER)

#define	AV_CH_LAYOUT_6POINT1_FRONT (AV_CH_LAYOUT_6POINT0_FRONT\|AV_CH_LOW_FREQUENCY)

#define	AV_CH_LAYOUT_7POINT0 (AV_CH_LAYOUT_5POINT0\|AV_CH_BACK_LEFT\|AV_CH_BACK_RIGHT)

#define	AV_CH_LAYOUT_7POINT0_FRONT (AV_CH_LAYOUT_5POINT0\|AV_CH_FRONT_LEFT_OF_CENTER\|AV_CH_FRONT_RIGHT_OF_CENTER)

#define	AV_CH_LAYOUT_7POINT1 (AV_CH_LAYOUT_5POINT1\|AV_CH_BACK_LEFT\|AV_CH_BACK_RIGHT)

#define	AV_CH_LAYOUT_7POINT1_WIDE (AV_CH_LAYOUT_5POINT1\|AV_CH_FRONT_LEFT_OF_CENTER\|AV_CH_FRONT_RIGHT_OF_CENTER)

#define	AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK\|AV_CH_FRONT_LEFT_OF_CENTER\|AV_CH_FRONT_RIGHT_OF_CENTER)

#define	AV_CH_LAYOUT_OCTAGONAL (AV_CH_LAYOUT_5POINT0\|AV_CH_BACK_LEFT\|AV_CH_BACK_CENTER\|AV_CH_BACK_RIGHT)

#define	AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT\|AV_CH_STEREO_RIGHT)

Enumerations
enum	AVMatrixEncoding { AV_MATRIX_ENCODING_NONE, AV_MATRIX_ENCODING_DOLBY, AV_MATRIX_ENCODING_DPLII, AV_MATRIX_ENCODING_NB }

Functions
uint64_t	av_get_channel_layout (const char *name)
	Return a channel layout id that matches name, or 0 if no match is found.

void	av_get_channel_layout_string (char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
	Return a description of a channel layout.

void	av_bprint_channel_layout (struct AVBPrint *bp, int nb_channels, uint64_t channel_layout)
	Append a description of a channel layout to a bprint buffer.

int	av_get_channel_layout_nb_channels (uint64_t channel_layout)
	Return the number of channels in the channel layout.

int64_t	av_get_default_channel_layout (int nb_channels)
	Return default channel layout for a given number of channels.

int	av_get_channel_layout_channel_index (uint64_t channel_layout, uint64_t channel)
	Get the index of a channel in channel_layout.

uint64_t	av_channel_layout_extract_channel (uint64_t channel_layout, int index)
	Get the channel with the given index in channel_layout.

const char *	av_get_channel_name (uint64_t channel)
	Get the name of a given channel.

const char *	av_get_channel_description (uint64_t channel)
	Get the description of a given channel.

int	av_get_standard_channel_layout (unsigned index, uint64_t layout, const char *name)
	Get the value and name of a standard channel layout.

Detailed Description

audio channel layout utility functions

Definition in file channel_layout.h.

Macros

Enumerations

Functions

Detailed Description