Audio channel masks

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

Collaboration diagram for Audio channel masks:

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. More...
#define	AV_CH_STEREO_RIGHT   0x40000000
	See AV_CH_STEREO_LEFT. More...
#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

#define AV_CH_BACK_CENTER   0x00000100

Definition at line 57 of file channel_layout.h.

Referenced by auto_matrix(), avresample_build_matrix(), dca_decode_frame(), oggvorbis_init_encoder(), and sniff_channel_order().

#define AV_CH_BACK_LEFT   0x00000010

Definition at line 53 of file channel_layout.h.

Referenced by auto_matrix(), avresample_build_matrix(), sane_layout(), and sniff_channel_order().

#define AV_CH_BACK_RIGHT   0x00000020

Definition at line 54 of file channel_layout.h.

Referenced by sane_layout(), and sniff_channel_order().

#define AV_CH_FRONT_CENTER   0x00000004

Definition at line 51 of file channel_layout.h.

Referenced by auto_matrix(), avresample_build_matrix(), clean_layout(), flac_encode_init(), oggvorbis_init_encoder(), output_configure(), and sniff_channel_order().

#define AV_CH_FRONT_LEFT   0x00000001

Definition at line 49 of file channel_layout.h.

Referenced by aac_decode_frame_int(), auto_matrix(), avresample_build_matrix(), output_configure(), sane_layout(), and sniff_channel_order().

#define AV_CH_FRONT_LEFT_OF_CENTER   0x00000040

Definition at line 55 of file channel_layout.h.

Referenced by auto_matrix(), avresample_build_matrix(), sane_layout(), and sniff_channel_order().

#define AV_CH_FRONT_RIGHT   0x00000002

Definition at line 50 of file channel_layout.h.

Referenced by aac_decode_frame_int(), output_configure(), sane_layout(), and sniff_channel_order().

#define AV_CH_FRONT_RIGHT_OF_CENTER   0x00000080

Definition at line 56 of file channel_layout.h.

Referenced by sane_layout(), and sniff_channel_order().

#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.

Definition at line 78 of file channel_layout.h.

Referenced by dca_decode_frame(), and output_configure().

#define AV_CH_LOW_FREQUENCY   0x00000008

Definition at line 52 of file channel_layout.h.

Referenced by auto_matrix(), avpriv_ac3_parse_header(), avresample_build_matrix(), config_audio_output(), dca_decode_frame(), mov_read_dac3(), mov_read_dec3(), read_restart_header(), set_channel_info(), sniff_channel_order(), and swap_channel_layouts_on_filter().

#define AV_CH_LOW_FREQUENCY_2   0x0000000800000000ULL

Definition at line 73 of file channel_layout.h.

Referenced by config_audio_output().

#define AV_CH_SIDE_LEFT   0x00000200

Definition at line 58 of file channel_layout.h.

Referenced by auto_matrix(), avresample_build_matrix(), sane_layout(), and sniff_channel_order().

#define AV_CH_SIDE_RIGHT   0x00000400

Definition at line 59 of file channel_layout.h.

Referenced by sane_layout(), and sniff_channel_order().

#define AV_CH_STEREO_LEFT   0x20000000

Stereo downmix.

Definition at line 67 of file channel_layout.h.

Referenced by mov_get_channel_label(), and sane_layout().

#define AV_CH_STEREO_RIGHT   0x40000000

See AV_CH_STEREO_LEFT.

Definition at line 68 of file channel_layout.h.

Referenced by mov_get_channel_label(), and sane_layout().

#define AV_CH_SURROUND_DIRECT_LEFT   0x0000000200000000ULL

Definition at line 71 of file channel_layout.h.

Referenced by sane_layout().

#define AV_CH_SURROUND_DIRECT_RIGHT   0x0000000400000000ULL

Definition at line 72 of file channel_layout.h.

Referenced by sane_layout().

#define AV_CH_TOP_BACK_CENTER   0x00010000

Definition at line 65 of file channel_layout.h.

#define AV_CH_TOP_BACK_LEFT   0x00008000

Definition at line 64 of file channel_layout.h.

Referenced by sane_layout().

#define AV_CH_TOP_BACK_RIGHT   0x00020000

Definition at line 66 of file channel_layout.h.

Referenced by sane_layout().

#define AV_CH_TOP_CENTER   0x00000800

Definition at line 60 of file channel_layout.h.

#define AV_CH_TOP_FRONT_CENTER   0x00002000

Definition at line 62 of file channel_layout.h.

#define AV_CH_TOP_FRONT_LEFT   0x00001000

Definition at line 61 of file channel_layout.h.

Referenced by sane_layout().

#define AV_CH_TOP_FRONT_RIGHT   0x00004000

Definition at line 63 of file channel_layout.h.

Referenced by sane_layout().

#define AV_CH_WIDE_LEFT   0x0000000080000000ULL

Definition at line 69 of file channel_layout.h.

Referenced by sane_layout().

#define AV_CH_WIDE_RIGHT   0x0000000100000000ULL

Definition at line 70 of file channel_layout.h.

Referenced by sane_layout().