Граф связей класса Audio channel layouts:Функции | |
| uint64_t | av_get_channel_layout (const char *name) |
| int | av_get_extended_channel_layout (const char *name, uint64_t *channel_layout, int *nb_channels) |
| void | av_get_channel_layout_string (char *buf, int buf_size, int nb_channels, uint64_t channel_layout) |
| void | av_bprint_channel_layout (struct AVBPrint *bp, int nb_channels, uint64_t channel_layout) |
| int | av_get_channel_layout_nb_channels (uint64_t channel_layout) |
| int64_t | av_get_default_channel_layout (int nb_channels) |
| int | av_get_channel_layout_channel_index (uint64_t channel_layout, uint64_t channel) |
| uint64_t | av_channel_layout_extract_channel (uint64_t channel_layout, int index) |
| const char * | av_get_channel_name (uint64_t channel) |
| const char * | av_get_channel_description (uint64_t channel) |
| int | av_get_standard_channel_layout (unsigned index, uint64_t *layout, const char **name) |
Подробное описание
Перечисления
◆ AVMatrixEncoding
| enum AVMatrixEncoding |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
См. определение в файле channel_layout.h строка 114
Функции
◆ av_get_channel_layout()
| uint64_t av_get_channel_layout | ( | const char * | name | ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Return a channel layout id that matches name, or 0 if no match is found.
name can be one or several of the following notations, separated by '+' or '|':
- the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0, 5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
- the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC, SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
- a number of channels, in decimal, followed by 'c', yielding the default channel layout for that number of channels (
- См. также
- av_get_default_channel_layout);
- a channel layout mask, in hexadecimal starting with "0x" (see the AV_CH_* macros).
Example: "stereo+FC" = "2c+FC" = "2c+1c" = "0x7"
◆ av_get_extended_channel_layout()
| int av_get_extended_channel_layout | ( | const char * | name, |
| uint64_t * | channel_layout, | ||
| int * | nb_channels | ||
| ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Return a channel layout and the number of channels based on the specified name.
This function is similar to (
- См. также
- av_get_channel_layout), but can also parse unknown channel layout specifications.
- Аргументы
-
[in] name channel layout specification string [out] channel_layout parsed channel layout (0 if unknown) [out] nb_channels number of channels
- Возвращает
- 0 on success, AVERROR(EINVAL) if the parsing fails.
◆ av_get_channel_layout_string()
| void av_get_channel_layout_string | ( | char * | buf, |
| int | buf_size, | ||
| int | nb_channels, | ||
| uint64_t | channel_layout | ||
| ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Return a description of a channel layout. If nb_channels is <= 0, it is guessed from the channel_layout.
- Аргументы
-
buf put here the string containing the channel layout buf_size size in bytes of the buffer
◆ av_bprint_channel_layout()
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Append a description of a channel layout to a bprint buffer.
◆ av_get_channel_layout_nb_channels()
| int av_get_channel_layout_nb_channels | ( | uint64_t | channel_layout | ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Return the number of channels in the channel layout.
◆ av_get_default_channel_layout()
| int64_t av_get_default_channel_layout | ( | int | nb_channels | ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Return default channel layout for a given number of channels.
◆ av_get_channel_layout_channel_index()
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Get the index of a channel in channel_layout.
- Аргументы
-
channel a channel layout describing exactly one channel which must be present in channel_layout.
- Возвращает
- index of channel in channel_layout on success, a negative AVERROR on error.
◆ av_channel_layout_extract_channel()
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Get the channel with the given index in channel_layout.
◆ av_get_channel_name()
| const char* av_get_channel_name | ( | uint64_t | channel | ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Get the name of a given channel.
- Возвращает
- channel name on success, NULL on error.
◆ av_get_channel_description()
| const char* av_get_channel_description | ( | uint64_t | channel | ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Get the description of a given channel.
- Аргументы
-
channel a channel layout with a single channel
- Возвращает
- channel description on success, NULL on error
◆ av_get_standard_channel_layout()
| int av_get_standard_channel_layout | ( | unsigned | index, |
| uint64_t * | layout, | ||
| const char ** | name | ||
| ) |
#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavutil/channel_layout.h>
Get the value and name of a standard channel layout.
- Аргументы
-
[in] index index in an internal list, starting at 0 [out] layout channel layout mask [out] name name of the layout
- Возвращает
- 0 if the layout exists, <0 if index is beyond the limits
