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FFmpeg
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#include <stdint.h>#include <stdlib.h>#include <string.h>#include "avassert.h"#include "channel_layout.h"#include "bprint.h"#include "common.h"#include "error.h"#include "macros.h"#include "opt.h"Go to the source code of this file.
Data Structures | |
| struct | channel_name |
| struct | channel_layout_name |
Macros | |
| #define | CHAN_IS_AMBI(x) |
Functions | |
| static const char * | get_channel_name (enum AVChannel channel_id) |
| void | av_channel_name_bprint (AVBPrint *bp, enum AVChannel channel_id) |
| bprint variant of av_channel_name(). More... | |
| int | av_channel_name (char *buf, size_t buf_size, enum AVChannel channel_id) |
| Get a human readable string in an abbreviated form describing a given channel. More... | |
| void | av_channel_description_bprint (AVBPrint *bp, enum AVChannel channel_id) |
| bprint variant of av_channel_description(). More... | |
| int | av_channel_description (char *buf, size_t buf_size, enum AVChannel channel_id) |
| Get a human readable string describing a given channel. More... | |
| enum AVChannel | av_channel_from_string (const char *str) |
| This is the inverse function of av_channel_name(). More... | |
| static FF_DISABLE_DEPRECATION_WARNINGS uint64_t | get_channel_layout_single (const char *name, int name_len) |
| uint64_t | av_get_channel_layout (const char *name) |
| Return a channel layout id that matches name, or 0 if no match is found. More... | |
| int | av_get_extended_channel_layout (const char *name, uint64_t *channel_layout, int *nb_channels) |
| Return a channel layout and the number of channels based on the specified name. More... | |
| void | av_bprint_channel_layout (struct AVBPrint *bp, int nb_channels, uint64_t channel_layout) |
| Append a description of a channel layout to a bprint buffer. More... | |
| 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. More... | |
| int | av_get_channel_layout_nb_channels (uint64_t channel_layout) |
| Return the number of channels in the channel layout. More... | |
| int64_t | av_get_default_channel_layout (int nb_channels) |
| Return default channel layout for a given number of channels. More... | |
| int | av_get_channel_layout_channel_index (uint64_t channel_layout, uint64_t channel) |
| Get the index of a channel in channel_layout. More... | |
| const char * | av_get_channel_name (uint64_t channel) |
| Get the name of a given channel. More... | |
| const char * | av_get_channel_description (uint64_t channel) |
| Get the description of a given channel. More... | |
| uint64_t | av_channel_layout_extract_channel (uint64_t channel_layout, int index) |
| Get the channel with the given index in channel_layout. More... | |
| int | av_get_standard_channel_layout (unsigned index, uint64_t *layout, const char **name) |
| Get the value and name of a standard channel layout. More... | |
| FF_ENABLE_DEPRECATION_WARNINGS 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_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... | |
| static int | ambisonic_order (const AVChannelLayout *channel_layout) |
| If the layout is n-th order standard-order ambisonic, with optional extra non-diegetic channels at the end, return the order. More... | |
| static int | try_describe_ambisonic (AVBPrint *bp, const AVChannelLayout *channel_layout) |
| If the custom layout is n-th order standard-order ambisonic, with optional extra non-diegetic channels at the end, write its string description in bp. More... | |
| int | av_channel_layout_describe_bprint (const AVChannelLayout *channel_layout, AVBPrint *bp) |
| bprint variant of av_channel_layout_describe(). 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... | |
| 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... | |
| enum AVChannel | av_channel_layout_channel_from_string (const AVChannelLayout *channel_layout, const char *str) |
| Get a channel described by the given string. 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 *str) |
| Get the index in a channel layout of a channel described by the given string. 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... | |
| 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... | |
| 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... | |
Variables | |
| static const struct channel_name | channel_names [] |
| static const struct channel_layout_name | channel_layout_map [] |
audio channel layout utility functions
Definition in file channel_layout.c.
| #define CHAN_IS_AMBI | ( | x | ) |
Definition at line 38 of file channel_layout.c.
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Definition at line 79 of file channel_layout.c.
Referenced by av_bprint_channel_layout(), and av_get_channel_name().
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Definition at line 207 of file channel_layout.c.
Referenced by av_get_channel_layout().
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If the layout is n-th order standard-order ambisonic, with optional extra non-diegetic channels at the end, return the order.
Return a negative error code otherwise.
Definition at line 655 of file channel_layout.c.
Referenced by ff_opus_parse_extradata(), mov_read_SA3D(), and try_describe_ambisonic().
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If the custom layout is n-th order standard-order ambisonic, with optional extra non-diegetic channels at the end, write its string description in bp.
Return a negative error code otherwise.
Definition at line 698 of file channel_layout.c.
Referenced by av_channel_layout_describe_bprint().
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Definition at line 46 of file channel_layout.c.
Referenced by av_channel_description_bprint(), av_channel_from_string(), av_channel_layout_from_string(), av_channel_name_bprint(), av_get_channel_description(), get_channel_layout_single(), and get_channel_name().
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Definition at line 173 of file channel_layout.c.
Referenced by av_bprint_channel_layout(), av_channel_layout_default(), av_channel_layout_describe_bprint(), av_channel_layout_from_string(), av_channel_layout_standard(), av_get_default_channel_layout(), av_get_standard_channel_layout(), and get_channel_layout_single().
1.8.17