libavutil/audioconvert.h File Reference

audio conversion routines More...

#include <stdint.h>

Go to the source code of this file.

Defines

#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_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)

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.
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.


Detailed Description

audio conversion routines

Definition in file audioconvert.h.


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