Audio channel masks

A channel layout is a 64-bits integer with a bit set for every channel. More...

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. More...

Detailed Description

A channel layout is a 64-bits integer with a bit set for every channel.

The number of bits set must be equal to the number of channels. The value 0 means that the channel layout is not known.

Note

this data structure is not powerful enough to handle channels combinations that have the same channel multiple times, such as dual-mono.

Macro Definition Documentation

AV_CH_LAYOUT_NATIVE

#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.