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channel_layout.h File Reference
libavutil » Audio related » Audio channels
#include <stdint.h>
#include <stdlib.h>
#include "version.h"
#include "attributes.h"

Go to the source code of this file.

Data Structures

struct  AVChannelCustom
 An AVChannelCustom defines a single channel within a custom order layout. More...
 
struct  AVChannelLayout
 An AVChannelLayout holds information about the channel layout of audio data. More...
 

Macros

#define AV_CH_FRONT_LEFT   (1ULL << AV_CHAN_FRONT_LEFT )
 
#define AV_CH_FRONT_RIGHT   (1ULL << AV_CHAN_FRONT_RIGHT )
 
#define AV_CH_FRONT_CENTER   (1ULL << AV_CHAN_FRONT_CENTER )
 
#define AV_CH_LOW_FREQUENCY   (1ULL << AV_CHAN_LOW_FREQUENCY )
 
#define AV_CH_BACK_LEFT   (1ULL << AV_CHAN_BACK_LEFT )
 
#define AV_CH_BACK_RIGHT   (1ULL << AV_CHAN_BACK_RIGHT )
 
#define AV_CH_FRONT_LEFT_OF_CENTER   (1ULL << AV_CHAN_FRONT_LEFT_OF_CENTER )
 
#define AV_CH_FRONT_RIGHT_OF_CENTER   (1ULL << AV_CHAN_FRONT_RIGHT_OF_CENTER)
 
#define AV_CH_BACK_CENTER   (1ULL << AV_CHAN_BACK_CENTER )
 
#define AV_CH_SIDE_LEFT   (1ULL << AV_CHAN_SIDE_LEFT )
 
#define AV_CH_SIDE_RIGHT   (1ULL << AV_CHAN_SIDE_RIGHT )
 
#define AV_CH_TOP_CENTER   (1ULL << AV_CHAN_TOP_CENTER )
 
#define AV_CH_TOP_FRONT_LEFT   (1ULL << AV_CHAN_TOP_FRONT_LEFT )
 
#define AV_CH_TOP_FRONT_CENTER   (1ULL << AV_CHAN_TOP_FRONT_CENTER )
 
#define AV_CH_TOP_FRONT_RIGHT   (1ULL << AV_CHAN_TOP_FRONT_RIGHT )
 
#define AV_CH_TOP_BACK_LEFT   (1ULL << AV_CHAN_TOP_BACK_LEFT )
 
#define AV_CH_TOP_BACK_CENTER   (1ULL << AV_CHAN_TOP_BACK_CENTER )
 
#define AV_CH_TOP_BACK_RIGHT   (1ULL << AV_CHAN_TOP_BACK_RIGHT )
 
#define AV_CH_STEREO_LEFT   (1ULL << AV_CHAN_STEREO_LEFT )
 
#define AV_CH_STEREO_RIGHT   (1ULL << AV_CHAN_STEREO_RIGHT )
 
#define AV_CH_WIDE_LEFT   (1ULL << AV_CHAN_WIDE_LEFT )
 
#define AV_CH_WIDE_RIGHT   (1ULL << AV_CHAN_WIDE_RIGHT )
 
#define AV_CH_SURROUND_DIRECT_LEFT   (1ULL << AV_CHAN_SURROUND_DIRECT_LEFT )
 
#define AV_CH_SURROUND_DIRECT_RIGHT   (1ULL << AV_CHAN_SURROUND_DIRECT_RIGHT)
 
#define AV_CH_LOW_FREQUENCY_2   (1ULL << AV_CHAN_LOW_FREQUENCY_2 )
 
#define AV_CH_TOP_SIDE_LEFT   (1ULL << AV_CHAN_TOP_SIDE_LEFT )
 
#define AV_CH_TOP_SIDE_RIGHT   (1ULL << AV_CHAN_TOP_SIDE_RIGHT )
 
#define AV_CH_BOTTOM_FRONT_CENTER   (1ULL << AV_CHAN_BOTTOM_FRONT_CENTER )
 
#define AV_CH_BOTTOM_FRONT_LEFT   (1ULL << AV_CHAN_BOTTOM_FRONT_LEFT )
 
#define AV_CH_BOTTOM_FRONT_RIGHT   (1ULL << AV_CHAN_BOTTOM_FRONT_RIGHT )
 
#define AV_CH_SIDE_SURROUND_LEFT   (1ULL << AV_CHAN_SIDE_SURROUND_LEFT )
 
#define AV_CH_SIDE_SURROUND_RIGHT   (1ULL << AV_CHAN_SIDE_SURROUND_RIGHT )
 
#define AV_CH_TOP_SURROUND_LEFT   (1ULL << AV_CHAN_TOP_SURROUND_LEFT )
 
#define AV_CH_TOP_SURROUND_RIGHT   (1ULL << AV_CHAN_TOP_SURROUND_RIGHT )
 
#define AV_CH_BINAURAL_LEFT   (1ULL << AV_CHAN_BINAURAL_LEFT )
 
#define AV_CH_BINAURAL_RIGHT   (1ULL << AV_CHAN_BINAURAL_RIGHT )
 
#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_3POINT1POINT2   (AV_CH_LAYOUT_3POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 
#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_5POINT1POINT2   (AV_CH_LAYOUT_5POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 
#define AV_CH_LAYOUT_5POINT1POINT2_BACK   (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 
#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_CUBE   (AV_CH_LAYOUT_QUAD|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
 
#define AV_CH_LAYOUT_5POINT1POINT4_BACK   (AV_CH_LAYOUT_5POINT1POINT2|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
 
#define AV_CH_LAYOUT_7POINT1POINT2   (AV_CH_LAYOUT_7POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 
#define AV_CH_LAYOUT_7POINT1POINT4_BACK   (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
 
#define AV_CH_LAYOUT_7POINT2POINT3   (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_CENTER|AV_CH_LOW_FREQUENCY_2)
 
#define AV_CH_LAYOUT_9POINT1POINT4_BACK   (AV_CH_LAYOUT_7POINT1POINT4_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
 
#define AV_CH_LAYOUT_9POINT1POINT6   (AV_CH_LAYOUT_9POINT1POINT4_BACK|AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT)
 
#define AV_CH_LAYOUT_HEXADECAGONAL   (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 
#define AV_CH_LAYOUT_BINAURAL   (AV_CH_BINAURAL_LEFT|AV_CH_BINAURAL_RIGHT)
 
#define AV_CH_LAYOUT_STEREO_DOWNMIX   (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
 
#define AV_CH_LAYOUT_22POINT2   (AV_CH_LAYOUT_9POINT1POINT6|AV_CH_BACK_CENTER|AV_CH_LOW_FREQUENCY_2|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_CENTER|AV_CH_TOP_BACK_CENTER|AV_CH_BOTTOM_FRONT_CENTER|AV_CH_BOTTOM_FRONT_LEFT|AV_CH_BOTTOM_FRONT_RIGHT)
 
#define AV_CH_LAYOUT_7POINT1_TOP_BACK   AV_CH_LAYOUT_5POINT1POINT2_BACK
 
#define AV_CHANNEL_LAYOUT_MASK(nb, m)
 Macro to define native channel layouts. More...
 
#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS   (1 << 0)
 The conversion must be lossless. More...
 
#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL   (1 << 1)
 The specified retype target order is ignored and the simplest possible (canonical) order is used for which the input layout can be losslessy represented. More...
 
Common pre-defined channel layouts
#define AV_CHANNEL_LAYOUT_MONO   AV_CHANNEL_LAYOUT_MASK(1, AV_CH_LAYOUT_MONO)
 
#define AV_CHANNEL_LAYOUT_STEREO   AV_CHANNEL_LAYOUT_MASK(2, AV_CH_LAYOUT_STEREO)
 
#define AV_CHANNEL_LAYOUT_2POINT1   AV_CHANNEL_LAYOUT_MASK(3, AV_CH_LAYOUT_2POINT1)
 
#define AV_CHANNEL_LAYOUT_2_1   AV_CHANNEL_LAYOUT_MASK(3, AV_CH_LAYOUT_2_1)
 
#define AV_CHANNEL_LAYOUT_SURROUND   AV_CHANNEL_LAYOUT_MASK(3, AV_CH_LAYOUT_SURROUND)
 
#define AV_CHANNEL_LAYOUT_3POINT1   AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_3POINT1)
 
#define AV_CHANNEL_LAYOUT_4POINT0   AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_4POINT0)
 
#define AV_CHANNEL_LAYOUT_4POINT1   AV_CHANNEL_LAYOUT_MASK(5, AV_CH_LAYOUT_4POINT1)
 
#define AV_CHANNEL_LAYOUT_2_2   AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_2_2)
 
#define AV_CHANNEL_LAYOUT_QUAD   AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_QUAD)
 
#define AV_CHANNEL_LAYOUT_5POINT0   AV_CHANNEL_LAYOUT_MASK(5, AV_CH_LAYOUT_5POINT0)
 
#define AV_CHANNEL_LAYOUT_5POINT1   AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_5POINT1)
 
#define AV_CHANNEL_LAYOUT_5POINT0_BACK   AV_CHANNEL_LAYOUT_MASK(5, AV_CH_LAYOUT_5POINT0_BACK)
 
#define AV_CHANNEL_LAYOUT_5POINT1_BACK   AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_5POINT1_BACK)
 
#define AV_CHANNEL_LAYOUT_6POINT0   AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_6POINT0)
 
#define AV_CHANNEL_LAYOUT_6POINT0_FRONT   AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_6POINT0_FRONT)
 
#define AV_CHANNEL_LAYOUT_3POINT1POINT2   AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_3POINT1POINT2)
 
#define AV_CHANNEL_LAYOUT_HEXAGONAL   AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_HEXAGONAL)
 
#define AV_CHANNEL_LAYOUT_6POINT1   AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_6POINT1)
 
#define AV_CHANNEL_LAYOUT_6POINT1_BACK   AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_6POINT1_BACK)
 
#define AV_CHANNEL_LAYOUT_6POINT1_FRONT   AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_6POINT1_FRONT)
 
#define AV_CHANNEL_LAYOUT_7POINT0   AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_7POINT0)
 
#define AV_CHANNEL_LAYOUT_7POINT0_FRONT   AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_7POINT0_FRONT)
 
#define AV_CHANNEL_LAYOUT_7POINT1   AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_7POINT1)
 
#define AV_CHANNEL_LAYOUT_7POINT1_WIDE   AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_7POINT1_WIDE)
 
#define AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK   AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_7POINT1_WIDE_BACK)
 
#define AV_CHANNEL_LAYOUT_5POINT1POINT2   AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_5POINT1POINT2)
 
#define AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK   AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_5POINT1POINT2_BACK)
 
#define AV_CHANNEL_LAYOUT_OCTAGONAL   AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_OCTAGONAL)
 
#define AV_CHANNEL_LAYOUT_CUBE   AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_CUBE)
 
#define AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK   AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_5POINT1POINT4_BACK)
 
#define AV_CHANNEL_LAYOUT_7POINT1POINT2   AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_7POINT1POINT2)
 
#define AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK   AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT1POINT4_BACK)
 
#define AV_CHANNEL_LAYOUT_7POINT2POINT3   AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT2POINT3)
 
#define AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK   AV_CHANNEL_LAYOUT_MASK(14, AV_CH_LAYOUT_9POINT1POINT4_BACK)
 
#define AV_CHANNEL_LAYOUT_9POINT1POINT6   AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_9POINT1POINT6)
 
#define AV_CHANNEL_LAYOUT_HEXADECAGONAL   AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_HEXADECAGONAL)
 
#define AV_CHANNEL_LAYOUT_BINAURAL   AV_CHANNEL_LAYOUT_MASK(2, AV_CH_LAYOUT_BINAURAL)
 
#define AV_CHANNEL_LAYOUT_STEREO_DOWNMIX   AV_CHANNEL_LAYOUT_MASK(2, AV_CH_LAYOUT_STEREO_DOWNMIX)
 
#define AV_CHANNEL_LAYOUT_22POINT2   AV_CHANNEL_LAYOUT_MASK(24, AV_CH_LAYOUT_22POINT2)
 
#define AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK   AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK
 
#define AV_CHANNEL_LAYOUT_AMBISONIC_FIRST_ORDER
 

Enumerations

enum  AVChannel {
  AV_CHAN_NONE = -1, AV_CHAN_FRONT_LEFT, AV_CHAN_FRONT_RIGHT, AV_CHAN_FRONT_CENTER,
  AV_CHAN_LOW_FREQUENCY, AV_CHAN_BACK_LEFT, AV_CHAN_BACK_RIGHT, AV_CHAN_FRONT_LEFT_OF_CENTER,
  AV_CHAN_FRONT_RIGHT_OF_CENTER, AV_CHAN_BACK_CENTER, AV_CHAN_SIDE_LEFT, AV_CHAN_SIDE_RIGHT,
  AV_CHAN_TOP_CENTER, AV_CHAN_TOP_FRONT_LEFT, AV_CHAN_TOP_FRONT_CENTER, AV_CHAN_TOP_FRONT_RIGHT,
  AV_CHAN_TOP_BACK_LEFT, AV_CHAN_TOP_BACK_CENTER, AV_CHAN_TOP_BACK_RIGHT, AV_CHAN_STEREO_LEFT = 29,
  AV_CHAN_STEREO_RIGHT, AV_CHAN_WIDE_LEFT, AV_CHAN_WIDE_RIGHT, AV_CHAN_SURROUND_DIRECT_LEFT,
  AV_CHAN_SURROUND_DIRECT_RIGHT, AV_CHAN_LOW_FREQUENCY_2, AV_CHAN_TOP_SIDE_LEFT, AV_CHAN_TOP_SIDE_RIGHT,
  AV_CHAN_BOTTOM_FRONT_CENTER, AV_CHAN_BOTTOM_FRONT_LEFT, AV_CHAN_BOTTOM_FRONT_RIGHT, AV_CHAN_SIDE_SURROUND_LEFT,
  AV_CHAN_SIDE_SURROUND_RIGHT, AV_CHAN_TOP_SURROUND_LEFT, AV_CHAN_TOP_SURROUND_RIGHT, AV_CHAN_BINAURAL_LEFT = 61,
  AV_CHAN_BINAURAL_RIGHT, AV_CHAN_UNUSED = 0x200, AV_CHAN_UNKNOWN = 0x300, AV_CHAN_AMBISONIC_BASE = 0x400,
  AV_CHAN_AMBISONIC_END = 0x7ff
}
 
enum  AVChannelOrder {
  AV_CHANNEL_ORDER_UNSPEC, AV_CHANNEL_ORDER_NATIVE, AV_CHANNEL_ORDER_CUSTOM, AV_CHANNEL_ORDER_AMBISONIC,
  FF_CHANNEL_ORDER_NB
}
 
enum  AVMatrixEncoding {
  AV_MATRIX_ENCODING_NONE, AV_MATRIX_ENCODING_DOLBY, AV_MATRIX_ENCODING_DPLII, AV_MATRIX_ENCODING_DPLIIX,
  AV_MATRIX_ENCODING_DPLIIZ, AV_MATRIX_ENCODING_DOLBYEX, AV_MATRIX_ENCODING_DOLBYHEADPHONE, AV_MATRIX_ENCODING_NB
}
 

Functions

int av_channel_name (char *buf, size_t buf_size, enum AVChannel channel)
 Get a human readable string in an abbreviated form describing a given channel. More...
 
void av_channel_name_bprint (struct AVBPrint *bp, enum AVChannel channel_id)
 bprint variant of av_channel_name(). More...
 
int av_channel_description (char *buf, size_t buf_size, enum AVChannel channel)
 Get a human readable string describing a given channel. More...
 
void av_channel_description_bprint (struct AVBPrint *bp, enum AVChannel channel_id)
 bprint variant of av_channel_description(). More...
 
enum AVChannel av_channel_from_string (const char *name)
 This is the inverse function of av_channel_name(). More...
 
int av_channel_layout_custom_init (AVChannelLayout *channel_layout, int nb_channels)
 Initialize a custom channel layout with the specified number of channels. More...
 
int av_channel_layout_from_mask (AVChannelLayout *channel_layout, uint64_t mask)
 Initialize a native channel layout from a bitmask indicating which channels are present. More...
 
int av_channel_layout_from_string (AVChannelLayout *channel_layout, const char *str)
 Initialize a channel layout from a given string description. More...
 
void av_channel_layout_default (AVChannelLayout *ch_layout, int nb_channels)
 Get the default channel layout for a given number of channels. More...
 
const AVChannelLayout * av_channel_layout_standard (void **opaque)
 Iterate over all standard channel layouts. More...
 
void av_channel_layout_uninit (AVChannelLayout *channel_layout)
 Free any allocated data in the channel layout and reset the channel count to 0. More...
 
int av_channel_layout_copy (AVChannelLayout *dst, const AVChannelLayout *src)
 Make a copy of a channel layout. More...
 
int av_channel_layout_describe (const AVChannelLayout *channel_layout, char *buf, size_t buf_size)
 Get a human-readable string describing the channel layout properties. More...
 
int av_channel_layout_describe_bprint (const AVChannelLayout *channel_layout, struct AVBPrint *bp)
 bprint variant of av_channel_layout_describe(). More...
 
enum AVChannel av_channel_layout_channel_from_index (const AVChannelLayout *channel_layout, unsigned int idx)
 Get the channel with the given index in a channel layout. More...
 
int av_channel_layout_index_from_channel (const AVChannelLayout *channel_layout, enum AVChannel channel)
 Get the index of a given channel in a channel layout. More...
 
int av_channel_layout_index_from_string (const AVChannelLayout *channel_layout, const char *name)
 Get the index in a channel layout of a channel described by the given string. More...
 
enum AVChannel av_channel_layout_channel_from_string (const AVChannelLayout *channel_layout, const char *name)
 Get a channel described by the given string. More...
 
uint64_t av_channel_layout_subset (const AVChannelLayout *channel_layout, uint64_t mask)
 Find out what channels from a given set are present in a channel layout, without regard for their positions. More...
 
int av_channel_layout_check (const AVChannelLayout *channel_layout)
 Check whether a channel layout is valid, i.e. More...
 
int av_channel_layout_compare (const AVChannelLayout *chl, const AVChannelLayout *chl1)
 Check whether two channel layouts are semantically the same, i.e. More...
 
int av_channel_layout_ambisonic_order (const AVChannelLayout *channel_layout)
 Return the order if the layout is n-th order standard-order ambisonic. More...
 
int av_channel_layout_retype (AVChannelLayout *channel_layout, enum AVChannelOrder order, int flags)
 Change the AVChannelOrder of a channel layout. More...
 

Detailed Description

Public libavutil channel layout APIs header.

Definition in file channel_layout.h.

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