Bluetooth Audio . More...

Topics
	Assigned numbers to string API
	Assigned numbers to string API .

	Codec capability parsing APIs
	Audio codec capabilities APIs .

	Codec config parsing APIs
	Audio codec Config APIs .

Data Structures
struct	bt_audio_codec_octets_per_codec_frame
	struct to hold minimum and maximum supported codec frame sizes More...

struct	bt_audio_codec_cap
	Codec capability structure. More...

struct	bt_audio_codec_cfg
	Codec specific configuration structure. More...

Macros
#define	BT_AUDIO_BROADCAST_ID_SIZE 3
	Size of the broadcast ID in octets.

#define	BT_AUDIO_BROADCAST_ID_MAX 0xFFFFFFU
	Maximum broadcast ID value.

#define	BT_AUDIO_PD_PREF_NONE 0x000000U
	Indicates that the server have no preference for the presentation delay.

#define	BT_AUDIO_PD_MAX 0xFFFFFFU
	Maximum presentation delay in microseconds.

#define	BT_AUDIO_RTN_PREF_NONE 0xFFU
	Indicates that the unicast server does not have a preference for any retransmission number.

#define	BT_AUDIO_BROADCAST_NAME_LEN_MIN 4
	The minimum size of a Broadcast Name as defined by Bluetooth Assigned Numbers.

#define	BT_AUDIO_BROADCAST_NAME_LEN_MAX 128
	The maximum size of a Broadcast Name as defined by Bluetooth Assigned Numbers.

#define	BT_AUDIO_LANG_SIZE 3
	Size of the stream language value, e.g.

#define	BT_AUDIO_CODEC_CAP_CHAN_COUNT_MIN 1
	Minimum supported channel counts.

#define	BT_AUDIO_CODEC_CAP_CHAN_COUNT_MAX 8
	Maximum supported channel counts.

#define	BT_AUDIO_CODEC_CAP_CHAN_COUNT_SUPPORT(...)
	Channel count support capability.

#define	BT_AUDIO_CONTEXT_TYPE_ANY
	Any known context.

#define	BT_AUDIO_METADATA_TYPE_IS_KNOWN(_type)
	Helper to check whether metadata type is known by the stack.

#define	BT_AUDIO_CODEC_DATA(_type, _bytes...)
	Helper to declare elements of bt_audio_codec_cap arrays.

#define	BT_AUDIO_CODEC_CFG(_id, _cid, _vid, _data, _meta)
	Helper to declare Codec config parsing APIs.

#define	BT_AUDIO_CODEC_CAP(_id, _cid, _vid, _data, _meta)
	Helper to declare Codec capability parsing APIs structure.

#define	BT_AUDIO_LOCATION_ANY
	Any known location.

Enumerations
enum	bt_audio_codec_cap_type { BT_AUDIO_CODEC_CAP_TYPE_FREQ = 0x01 , BT_AUDIO_CODEC_CAP_TYPE_DURATION = 0x02 , BT_AUDIO_CODEC_CAP_TYPE_CHAN_COUNT = 0x03 , BT_AUDIO_CODEC_CAP_TYPE_FRAME_LEN = 0x04 , BT_AUDIO_CODEC_CAP_TYPE_FRAME_COUNT = 0x05 }
	Codec capability types. More...

enum	bt_audio_codec_cap_freq { BT_AUDIO_CODEC_CAP_FREQ_8KHZ = BIT(0) , BT_AUDIO_CODEC_CAP_FREQ_11KHZ = BIT(1) , BT_AUDIO_CODEC_CAP_FREQ_16KHZ = BIT(2) , BT_AUDIO_CODEC_CAP_FREQ_22KHZ = BIT(3) , BT_AUDIO_CODEC_CAP_FREQ_24KHZ = BIT(4) , BT_AUDIO_CODEC_CAP_FREQ_32KHZ = BIT(5) , BT_AUDIO_CODEC_CAP_FREQ_44KHZ = BIT(6) , BT_AUDIO_CODEC_CAP_FREQ_48KHZ = BIT(7) , BT_AUDIO_CODEC_CAP_FREQ_88KHZ = BIT(8) , BT_AUDIO_CODEC_CAP_FREQ_96KHZ = BIT(9) , BT_AUDIO_CODEC_CAP_FREQ_176KHZ = BIT(10) , BT_AUDIO_CODEC_CAP_FREQ_192KHZ = BIT(11) , BT_AUDIO_CODEC_CAP_FREQ_384KHZ = BIT(12) , BT_AUDIO_CODEC_CAP_FREQ_ANY }
	Supported frequencies bitfield. More...

enum	bt_audio_codec_cap_frame_dur { BT_AUDIO_CODEC_CAP_DURATION_7_5 = BIT(0) , BT_AUDIO_CODEC_CAP_DURATION_10 = BIT(1) , BT_AUDIO_CODEC_CAP_DURATION_ANY , BT_AUDIO_CODEC_CAP_DURATION_PREFER_7_5 = BIT(4) , BT_AUDIO_CODEC_CAP_DURATION_PREFER_10 = BIT(5) }
	Supported frame durations bitfield. More...

enum	bt_audio_codec_cap_chan_count { BT_AUDIO_CODEC_CAP_CHAN_COUNT_1 = BIT(0) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_2 = BIT(1) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_3 = BIT(2) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_4 = BIT(3) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_5 = BIT(4) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_6 = BIT(5) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_7 = BIT(6) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_8 = BIT(7) , BT_AUDIO_CODEC_CAP_CHAN_COUNT_ANY }
	Supported audio capabilities channel count bitfield. More...

enum	bt_audio_codec_cfg_type { BT_AUDIO_CODEC_CFG_FREQ = 0x01 , BT_AUDIO_CODEC_CFG_DURATION = 0x02 , BT_AUDIO_CODEC_CFG_CHAN_ALLOC = 0x03 , BT_AUDIO_CODEC_CFG_FRAME_LEN = 0x04 , BT_AUDIO_CODEC_CFG_FRAME_BLKS_PER_SDU = 0x05 }
	Codec configuration types. More...

enum	bt_audio_codec_cfg_freq { BT_AUDIO_CODEC_CFG_FREQ_8KHZ = 0x01 , BT_AUDIO_CODEC_CFG_FREQ_11KHZ = 0x02 , BT_AUDIO_CODEC_CFG_FREQ_16KHZ = 0x03 , BT_AUDIO_CODEC_CFG_FREQ_22KHZ = 0x04 , BT_AUDIO_CODEC_CFG_FREQ_24KHZ = 0x05 , BT_AUDIO_CODEC_CFG_FREQ_32KHZ = 0x06 , BT_AUDIO_CODEC_CFG_FREQ_44KHZ = 0x07 , BT_AUDIO_CODEC_CFG_FREQ_48KHZ = 0x08 , BT_AUDIO_CODEC_CFG_FREQ_88KHZ = 0x09 , BT_AUDIO_CODEC_CFG_FREQ_96KHZ = 0x0a , BT_AUDIO_CODEC_CFG_FREQ_176KHZ = 0x0b , BT_AUDIO_CODEC_CFG_FREQ_192KHZ = 0x0c , BT_AUDIO_CODEC_CFG_FREQ_384KHZ = 0x0d }
	Codec configuration sampling freqency. More...

enum	bt_audio_codec_cfg_frame_dur { BT_AUDIO_CODEC_CFG_DURATION_7_5 = 0x00 , BT_AUDIO_CODEC_CFG_DURATION_10 = 0x01 }
	Codec configuration frame duration. More...

enum	bt_audio_context { BT_AUDIO_CONTEXT_TYPE_PROHIBITED = 0 , BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED = BIT(0) , BT_AUDIO_CONTEXT_TYPE_CONVERSATIONAL = BIT(1) , BT_AUDIO_CONTEXT_TYPE_MEDIA = BIT(2) , BT_AUDIO_CONTEXT_TYPE_GAME = BIT(3) , BT_AUDIO_CONTEXT_TYPE_INSTRUCTIONAL = BIT(4) , BT_AUDIO_CONTEXT_TYPE_VOICE_ASSISTANTS = BIT(5) , BT_AUDIO_CONTEXT_TYPE_LIVE = BIT(6) , BT_AUDIO_CONTEXT_TYPE_SOUND_EFFECTS = BIT(7) , BT_AUDIO_CONTEXT_TYPE_NOTIFICATIONS = BIT(8) , BT_AUDIO_CONTEXT_TYPE_RINGTONE = BIT(9) , BT_AUDIO_CONTEXT_TYPE_ALERTS = BIT(10) , BT_AUDIO_CONTEXT_TYPE_EMERGENCY_ALARM = BIT(11) }
	Audio Context Type for Generic Audio. More...

enum	bt_audio_parental_rating { BT_AUDIO_PARENTAL_RATING_NO_RATING = 0x00 , BT_AUDIO_PARENTAL_RATING_AGE_ANY = 0x01 , BT_AUDIO_PARENTAL_RATING_AGE_5_OR_ABOVE = 0x02 , BT_AUDIO_PARENTAL_RATING_AGE_6_OR_ABOVE = 0x03 , BT_AUDIO_PARENTAL_RATING_AGE_7_OR_ABOVE = 0x04 , BT_AUDIO_PARENTAL_RATING_AGE_8_OR_ABOVE = 0x05 , BT_AUDIO_PARENTAL_RATING_AGE_9_OR_ABOVE = 0x06 , BT_AUDIO_PARENTAL_RATING_AGE_10_OR_ABOVE = 0x07 , BT_AUDIO_PARENTAL_RATING_AGE_11_OR_ABOVE = 0x08 , BT_AUDIO_PARENTAL_RATING_AGE_12_OR_ABOVE = 0x09 , BT_AUDIO_PARENTAL_RATING_AGE_13_OR_ABOVE = 0x0A , BT_AUDIO_PARENTAL_RATING_AGE_14_OR_ABOVE = 0x0B , BT_AUDIO_PARENTAL_RATING_AGE_15_OR_ABOVE = 0x0C , BT_AUDIO_PARENTAL_RATING_AGE_16_OR_ABOVE = 0x0D , BT_AUDIO_PARENTAL_RATING_AGE_17_OR_ABOVE = 0x0E , BT_AUDIO_PARENTAL_RATING_AGE_18_OR_ABOVE = 0x0F }
	Parental rating defined by the Generic Audio assigned numbers (bluetooth.com). More...

enum	bt_audio_active_state { BT_AUDIO_ACTIVE_STATE_DISABLED = 0x00 , BT_AUDIO_ACTIVE_STATE_ENABLED = 0x01 }
	Audio Active State defined by the Generic Audio assigned numbers (bluetooth.com). More...

enum	bt_audio_assisted_listening_stream { BT_AUDIO_ASSISTED_LISTENING_STREAM_UNSPECIFIED = 0x00 }
	Assisted Listening Stream defined by the Generic Audio assigned numbers (bluetooth.com). More...

enum	bt_audio_metadata_type { BT_AUDIO_METADATA_TYPE_PREF_CONTEXT = 0x01 , BT_AUDIO_METADATA_TYPE_STREAM_CONTEXT = 0x02 , BT_AUDIO_METADATA_TYPE_PROGRAM_INFO = 0x03 , BT_AUDIO_METADATA_TYPE_LANG = 0x04 , BT_AUDIO_METADATA_TYPE_CCID_LIST = 0x05 , BT_AUDIO_METADATA_TYPE_PARENTAL_RATING = 0x06 , BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI = 0x07 , BT_AUDIO_METADATA_TYPE_AUDIO_STATE = 0x08 , BT_AUDIO_METADATA_TYPE_BROADCAST_IMMEDIATE = 0x09 , BT_AUDIO_METADATA_TYPE_ASSISTED_LISTENING_STREAM = 0x0A , BT_AUDIO_METADATA_TYPE_BROADCAST_NAME = 0x0B , BT_AUDIO_METADATA_TYPE_EXTENDED = 0xFE , BT_AUDIO_METADATA_TYPE_VENDOR = 0xFF }
	Codec metadata type IDs. More...

enum	bt_audio_location { BT_AUDIO_LOCATION_MONO_AUDIO = 0 , BT_AUDIO_LOCATION_FRONT_LEFT = BIT(0) , BT_AUDIO_LOCATION_FRONT_RIGHT = BIT(1) , BT_AUDIO_LOCATION_FRONT_CENTER = BIT(2) , BT_AUDIO_LOCATION_LOW_FREQ_EFFECTS_1 = BIT(3) , BT_AUDIO_LOCATION_BACK_LEFT = BIT(4) , BT_AUDIO_LOCATION_BACK_RIGHT = BIT(5) , BT_AUDIO_LOCATION_FRONT_LEFT_OF_CENTER = BIT(6) , BT_AUDIO_LOCATION_FRONT_RIGHT_OF_CENTER = BIT(7) , BT_AUDIO_LOCATION_BACK_CENTER = BIT(8) , BT_AUDIO_LOCATION_LOW_FREQ_EFFECTS_2 = BIT(9) , BT_AUDIO_LOCATION_SIDE_LEFT = BIT(10) , BT_AUDIO_LOCATION_SIDE_RIGHT = BIT(11) , BT_AUDIO_LOCATION_TOP_FRONT_LEFT = BIT(12) , BT_AUDIO_LOCATION_TOP_FRONT_RIGHT = BIT(13) , BT_AUDIO_LOCATION_TOP_FRONT_CENTER = BIT(14) , BT_AUDIO_LOCATION_TOP_CENTER = BIT(15) , BT_AUDIO_LOCATION_TOP_BACK_LEFT = BIT(16) , BT_AUDIO_LOCATION_TOP_BACK_RIGHT = BIT(17) , BT_AUDIO_LOCATION_TOP_SIDE_LEFT = BIT(18) , BT_AUDIO_LOCATION_TOP_SIDE_RIGHT = BIT(19) , BT_AUDIO_LOCATION_TOP_BACK_CENTER = BIT(20) , BT_AUDIO_LOCATION_BOTTOM_FRONT_CENTER = BIT(21) , BT_AUDIO_LOCATION_BOTTOM_FRONT_LEFT = BIT(22) , BT_AUDIO_LOCATION_BOTTOM_FRONT_RIGHT = BIT(23) , BT_AUDIO_LOCATION_FRONT_LEFT_WIDE = BIT(24) , BT_AUDIO_LOCATION_FRONT_RIGHT_WIDE = BIT(25) , BT_AUDIO_LOCATION_LEFT_SURROUND = BIT(26) , BT_AUDIO_LOCATION_RIGHT_SURROUND = BIT(27) }
	Location values for BT Audio. More...

enum	bt_audio_dir { BT_AUDIO_DIR_SINK = 0x01 , BT_AUDIO_DIR_SOURCE = 0x02 }
	Audio direction from the perspective of the BAP Unicast Server / BAP Broadcast Sink. More...

Functions
int	bt_audio_data_parse (const uint8_t ltv[], size_t size, bool(func)(struct bt_data data, void user_data), void user_data)
	Helper for parsing length-type-value data.

int	bt_audio_data_get_val (const uint8_t ltv_data[], size_t size, uint8_t type, const uint8_t **data)
	Get the value of a specific data type in an length-type-value data array.

uint8_t	bt_audio_get_chan_count (enum bt_audio_location chan_allocation)
	Function to get the number of channels from the channel allocation.

Unicast Announcement Type
#define	BT_AUDIO_UNICAST_ANNOUNCEMENT_GENERAL 0x00
	Unicast Server is connectable and is requesting a connection.

#define	BT_AUDIO_UNICAST_ANNOUNCEMENT_TARGETED 0x01
	Unicast Server is connectable but is not requesting a connection.

Detailed Description

Bluetooth Audio .

Macro Definition Documentation

◆ BT_AUDIO_BROADCAST_ID_MAX

#define BT_AUDIO_BROADCAST_ID_MAX 0xFFFFFFU

#include <zephyr/bluetooth/audio/audio.h>

Maximum broadcast ID value.

◆ BT_AUDIO_BROADCAST_ID_SIZE

#define BT_AUDIO_BROADCAST_ID_SIZE 3

#include <zephyr/bluetooth/audio/audio.h>

Size of the broadcast ID in octets.

◆ BT_AUDIO_BROADCAST_NAME_LEN_MAX

#define BT_AUDIO_BROADCAST_NAME_LEN_MAX 128

#include <zephyr/bluetooth/audio/audio.h>

The maximum size of a Broadcast Name as defined by Bluetooth Assigned Numbers.

◆ BT_AUDIO_BROADCAST_NAME_LEN_MIN

#define BT_AUDIO_BROADCAST_NAME_LEN_MIN 4

#include <zephyr/bluetooth/audio/audio.h>

The minimum size of a Broadcast Name as defined by Bluetooth Assigned Numbers.

◆ BT_AUDIO_CODEC_CAP

#define BT_AUDIO_CODEC_CAP	(	_id,
		_cid,
		_vid,
		_data,
		_meta )

#include <zephyr/bluetooth/audio/audio.h>

Value:

        ((struct bt_audio_codec_cap){                                                              \
                /* Use HCI data path as default, can be overwritten by application */              \
                .path_id = BT_ISO_DATA_PATH_HCI,                                                   \
                .ctlr_transcode = false,                                                           \
                .id = (_id),                                                                       \
                .cid = (_cid),                                                                     \
                .vid = (_vid),                                                                     \
                .data_len = sizeof((uint8_t[])_data),                                              \
                .data = _data,                                                                     \
                .meta_len = sizeof((uint8_t[])_meta),                                              \
                .meta = _meta,                                                                     \
        })

Helper to declare Codec capability parsing APIs structure.

Parameters

_id	Codec ID
_cid	Company ID
_vid	Vendor ID
_data	Codec Specific Data in LVT format
_meta	Codec Specific Metadata in LVT format

◆ BT_AUDIO_CODEC_CAP_CHAN_COUNT_MAX

#define BT_AUDIO_CODEC_CAP_CHAN_COUNT_MAX 8

#include <zephyr/bluetooth/audio/audio.h>

Maximum supported channel counts.

◆ BT_AUDIO_CODEC_CAP_CHAN_COUNT_MIN

#define BT_AUDIO_CODEC_CAP_CHAN_COUNT_MIN 1

#include <zephyr/bluetooth/audio/audio.h>

Minimum supported channel counts.

◆ BT_AUDIO_CODEC_CAP_CHAN_COUNT_SUPPORT

#define BT_AUDIO_CODEC_CAP_CHAN_COUNT_SUPPORT ( ... )

#include <zephyr/bluetooth/audio/audio.h>

Value:

((enum bt_audio_codec_cap_chan_count)((FOR_EACH(BIT, (|), __VA_ARGS__)) >> 1))

bt_audio_codec_cap_chan_count

Supported audio capabilities channel count bitfield.

Definition audio.h:165

FOR_EACH

#define FOR_EACH(F, sep,...)

Call a macro F on each provided argument with a given separator between each call.

Definition util_macro.h:493

BIT

#define BIT(n)

Unsigned integer with bit position n set (signed in assembly language).

Definition util_macro.h:44

Channel count support capability.

Macro accepts variable number of channel counts. The allowed channel counts are defined by specification and have to be in range from BT_AUDIO_CODEC_CAP_CHAN_COUNT_MIN to BT_AUDIO_CODEC_CAP_CHAN_COUNT_MAX inclusive.

Example to support 1 and 3 channels: BT_AUDIO_CODEC_CAP_CHAN_COUNT_SUPPORT(1, 3)

◆ BT_AUDIO_CODEC_CFG

#define BT_AUDIO_CODEC_CFG	(	_id,
		_cid,
		_vid,
		_data,
		_meta )

#include <zephyr/bluetooth/audio/audio.h>

Value:

        ((struct bt_audio_codec_cfg){                                                              \
                /* Use HCI data path as default, can be overwritten by application */              \
                .path_id = BT_ISO_DATA_PATH_HCI,                                                   \
                .ctlr_transcode = false,                                                           \
                .id = _id,                                                                         \
                .cid = _cid,                                                                       \
                .vid = _vid,                                                                       \
                .data_len = sizeof((uint8_t[])_data),                                              \
                .data = _data,                                                                     \
                .meta_len = sizeof((uint8_t[])_meta),                                              \
                .meta = _meta,                                                                     \
        })

Helper to declare Codec config parsing APIs.

Parameters

_id	Codec ID
_cid	Company ID
_vid	Vendor ID
_data	Codec Specific Data in LVT format
_meta	Codec Specific Metadata in LVT format

◆ BT_AUDIO_CODEC_DATA

#define BT_AUDIO_CODEC_DATA	(		_type,
			_bytes... )

#include <zephyr/bluetooth/audio/audio.h>

Value:

(sizeof((uint8_t)_type) + sizeof((uint8_t[]){_bytes})), (_type), _bytes

Helper to declare elements of bt_audio_codec_cap arrays.

This macro is mainly for creating an array of struct bt_audio_codec_cap data arrays.

Parameters

_type	Type of advertising data field
_bytes	Variable number of single-byte parameters

◆ BT_AUDIO_CONTEXT_TYPE_ANY

#define BT_AUDIO_CONTEXT_TYPE_ANY

#include <zephyr/bluetooth/audio/audio.h>

Value:

                                          (BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED | \
                                          BT_AUDIO_CONTEXT_TYPE_CONVERSATIONAL | \
                                          BT_AUDIO_CONTEXT_TYPE_MEDIA | \
                                          BT_AUDIO_CONTEXT_TYPE_GAME | \
                                          BT_AUDIO_CONTEXT_TYPE_INSTRUCTIONAL | \
                                          BT_AUDIO_CONTEXT_TYPE_VOICE_ASSISTANTS | \
                                          BT_AUDIO_CONTEXT_TYPE_LIVE | \
                                          BT_AUDIO_CONTEXT_TYPE_SOUND_EFFECTS | \
                                          BT_AUDIO_CONTEXT_TYPE_NOTIFICATIONS | \
                                          BT_AUDIO_CONTEXT_TYPE_RINGTONE | \
                                          BT_AUDIO_CONTEXT_TYPE_ALERTS | \
                                          BT_AUDIO_CONTEXT_TYPE_EMERGENCY_ALARM)

Any known context.

◆ BT_AUDIO_LANG_SIZE

#define BT_AUDIO_LANG_SIZE 3

#include <zephyr/bluetooth/audio/audio.h>

Size of the stream language value, e.g.

"eng"

◆ BT_AUDIO_LOCATION_ANY

#define BT_AUDIO_LOCATION_ANY

#include <zephyr/bluetooth/audio/audio.h>

Value:

                               (BT_AUDIO_LOCATION_FRONT_LEFT | \
                               BT_AUDIO_LOCATION_FRONT_RIGHT | \
                               BT_AUDIO_LOCATION_FRONT_CENTER | \
                               BT_AUDIO_LOCATION_LOW_FREQ_EFFECTS_1 | \
                               BT_AUDIO_LOCATION_BACK_LEFT | \
                               BT_AUDIO_LOCATION_BACK_RIGHT | \
                               BT_AUDIO_LOCATION_FRONT_LEFT_OF_CENTER | \
                               BT_AUDIO_LOCATION_FRONT_RIGHT_OF_CENTER | \
                               BT_AUDIO_LOCATION_BACK_CENTER | \
                               BT_AUDIO_LOCATION_LOW_FREQ_EFFECTS_2 | \
                               BT_AUDIO_LOCATION_SIDE_LEFT | \
                               BT_AUDIO_LOCATION_SIDE_RIGHT | \
                               BT_AUDIO_LOCATION_TOP_FRONT_LEFT | \
                               BT_AUDIO_LOCATION_TOP_FRONT_RIGHT | \
                               BT_AUDIO_LOCATION_TOP_FRONT_CENTER | \
                               BT_AUDIO_LOCATION_TOP_CENTER | \
                               BT_AUDIO_LOCATION_TOP_BACK_LEFT | \
                               BT_AUDIO_LOCATION_TOP_BACK_RIGHT | \
                               BT_AUDIO_LOCATION_TOP_SIDE_LEFT | \
                               BT_AUDIO_LOCATION_TOP_SIDE_RIGHT | \
                               BT_AUDIO_LOCATION_TOP_BACK_CENTER | \
                               BT_AUDIO_LOCATION_BOTTOM_FRONT_CENTER | \
                               BT_AUDIO_LOCATION_BOTTOM_FRONT_LEFT | \
                               BT_AUDIO_LOCATION_BOTTOM_FRONT_RIGHT | \
                               BT_AUDIO_LOCATION_FRONT_LEFT_WIDE | \
                               BT_AUDIO_LOCATION_FRONT_RIGHT_WIDE | \
                               BT_AUDIO_LOCATION_LEFT_SURROUND | \
                               BT_AUDIO_LOCATION_RIGHT_SURROUND)

Any known location.

◆ BT_AUDIO_METADATA_TYPE_IS_KNOWN

#define BT_AUDIO_METADATA_TYPE_IS_KNOWN ( _type )

#include <zephyr/bluetooth/audio/audio.h>

Value:

        (IN_RANGE((_type), BT_AUDIO_METADATA_TYPE_PREF_CONTEXT,                                    \
                  BT_AUDIO_METADATA_TYPE_BROADCAST_IMMEDIATE) ||                                   \
         (_type) == BT_AUDIO_METADATA_TYPE_EXTENDED || (_type) == BT_AUDIO_METADATA_TYPE_VENDOR)

Helper to check whether metadata type is known by the stack.

Note: _type is evaluated thrice.

◆ BT_AUDIO_PD_MAX

#define BT_AUDIO_PD_MAX 0xFFFFFFU

#include <zephyr/bluetooth/audio/audio.h>

Maximum presentation delay in microseconds.

◆ BT_AUDIO_PD_PREF_NONE

#define BT_AUDIO_PD_PREF_NONE 0x000000U

#include <zephyr/bluetooth/audio/audio.h>

Indicates that the server have no preference for the presentation delay.

◆ BT_AUDIO_RTN_PREF_NONE

#define BT_AUDIO_RTN_PREF_NONE 0xFFU

#include <zephyr/bluetooth/audio/audio.h>

Indicates that the unicast server does not have a preference for any retransmission number.

◆ BT_AUDIO_UNICAST_ANNOUNCEMENT_GENERAL

#define BT_AUDIO_UNICAST_ANNOUNCEMENT_GENERAL 0x00

#include <zephyr/bluetooth/audio/audio.h>

Unicast Server is connectable and is requesting a connection.

◆ BT_AUDIO_UNICAST_ANNOUNCEMENT_TARGETED

#define BT_AUDIO_UNICAST_ANNOUNCEMENT_TARGETED 0x01

#include <zephyr/bluetooth/audio/audio.h>

Unicast Server is connectable but is not requesting a connection.

Enumeration Type Documentation

◆ bt_audio_active_state

enum bt_audio_active_state

#include <zephyr/bluetooth/audio/audio.h>

Audio Active State defined by the Generic Audio assigned numbers (bluetooth.com).

Enumerator
BT_AUDIO_ACTIVE_STATE_DISABLED	No audio data is being transmitted.
BT_AUDIO_ACTIVE_STATE_ENABLED	Audio data is being transmitted.

◆ bt_audio_assisted_listening_stream

enum bt_audio_assisted_listening_stream

#include <zephyr/bluetooth/audio/audio.h>

Assisted Listening Stream defined by the Generic Audio assigned numbers (bluetooth.com).

Enumerator
BT_AUDIO_ASSISTED_LISTENING_STREAM_UNSPECIFIED	Unspecified audio enhancement.

◆ bt_audio_codec_cap_chan_count

enum bt_audio_codec_cap_chan_count

#include <zephyr/bluetooth/audio/audio.h>

Supported audio capabilities channel count bitfield.

Enumerator
BT_AUDIO_CODEC_CAP_CHAN_COUNT_1	Supporting 1 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_2	Supporting 2 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_3	Supporting 3 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_4	Supporting 4 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_5	Supporting 5 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_6	Supporting 6 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_7	Supporting 7 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_8	Supporting 8 channel.
BT_AUDIO_CODEC_CAP_CHAN_COUNT_ANY	Supporting all channels.

◆ bt_audio_codec_cap_frame_dur

enum bt_audio_codec_cap_frame_dur

#include <zephyr/bluetooth/audio/audio.h>

Supported frame durations bitfield.

Enumerator
BT_AUDIO_CODEC_CAP_DURATION_7_5	7.5 msec frame duration capability
BT_AUDIO_CODEC_CAP_DURATION_10	10 msec frame duration capability
BT_AUDIO_CODEC_CAP_DURATION_ANY	Any frame duration capability.
BT_AUDIO_CODEC_CAP_DURATION_PREFER_7_5	7.5 msec preferred frame duration capability. This shall only be set if BT_AUDIO_CODEC_CAP_DURATION_7_5 is also set, and if BT_AUDIO_CODEC_CAP_DURATION_PREFER_10 is not set.
BT_AUDIO_CODEC_CAP_DURATION_PREFER_10	10 msec preferred frame duration capability This shall only be set if BT_AUDIO_CODEC_CAP_DURATION_10 is also set, and if BT_AUDIO_CODEC_CAP_DURATION_PREFER_7_5 is not set.

◆ bt_audio_codec_cap_freq

enum bt_audio_codec_cap_freq

#include <zephyr/bluetooth/audio/audio.h>

Supported frequencies bitfield.

Enumerator
BT_AUDIO_CODEC_CAP_FREQ_8KHZ	8 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_11KHZ	11.025 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_16KHZ	16 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_22KHZ	22.05 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_24KHZ	24 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_32KHZ	32 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_44KHZ	44.1 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_48KHZ	48 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_88KHZ	88.2 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_96KHZ	96 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_176KHZ	176.4 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_192KHZ	192 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_384KHZ	384 Khz sampling frequency
BT_AUDIO_CODEC_CAP_FREQ_ANY	Any frequency capability.

◆ bt_audio_codec_cap_type

enum bt_audio_codec_cap_type

#include <zephyr/bluetooth/audio/audio.h>

Codec capability types.

Used to build and parse codec capabilities as specified in the PAC specification. Source is assigned numbers for Generic Audio, bluetooth.com.

Enumerator
BT_AUDIO_CODEC_CAP_TYPE_FREQ	Supported sampling frequencies.
BT_AUDIO_CODEC_CAP_TYPE_DURATION	Supported frame durations.
BT_AUDIO_CODEC_CAP_TYPE_CHAN_COUNT	Supported audio channel counts.
BT_AUDIO_CODEC_CAP_TYPE_FRAME_LEN	Supported octets per codec frame.
BT_AUDIO_CODEC_CAP_TYPE_FRAME_COUNT	Supported maximum codec frames per SDU

◆ bt_audio_codec_cfg_frame_dur

enum bt_audio_codec_cfg_frame_dur

#include <zephyr/bluetooth/audio/audio.h>

Codec configuration frame duration.

Enumerator
BT_AUDIO_CODEC_CFG_DURATION_7_5	7.5 msec Frame Duration configuration
BT_AUDIO_CODEC_CFG_DURATION_10	10 msec Frame Duration configuration

◆ bt_audio_codec_cfg_freq

enum bt_audio_codec_cfg_freq

#include <zephyr/bluetooth/audio/audio.h>

Codec configuration sampling freqency.

Enumerator
BT_AUDIO_CODEC_CFG_FREQ_8KHZ	8 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_11KHZ	11.025 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_16KHZ	16 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_22KHZ	22.05 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_24KHZ	24 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_32KHZ	32 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_44KHZ	44.1 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_48KHZ	48 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_88KHZ	88.2 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_96KHZ	96 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_176KHZ	176.4 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_192KHZ	192 Khz codec sampling frequency
BT_AUDIO_CODEC_CFG_FREQ_384KHZ	384 Khz codec sampling frequency

◆ bt_audio_codec_cfg_type

enum bt_audio_codec_cfg_type

#include <zephyr/bluetooth/audio/audio.h>

Codec configuration types.

Used to build and parse codec configurations as specified in the ASCS and BAP specifications. Source is assigned numbers for Generic Audio, bluetooth.com.

Enumerator
BT_AUDIO_CODEC_CFG_FREQ	Sampling frequency.
BT_AUDIO_CODEC_CFG_DURATION	Frame duration.
BT_AUDIO_CODEC_CFG_CHAN_ALLOC	Audio channel allocation.
BT_AUDIO_CODEC_CFG_FRAME_LEN	Octets per codec frame.
BT_AUDIO_CODEC_CFG_FRAME_BLKS_PER_SDU	Codec frame blocks per SDU.

◆ bt_audio_context

enum bt_audio_context

#include <zephyr/bluetooth/audio/audio.h>

Audio Context Type for Generic Audio.

These values are defined by the Generic Audio Assigned Numbers, bluetooth.com

Enumerator
BT_AUDIO_CONTEXT_TYPE_PROHIBITED	Prohibited.
BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED	Identifies audio where the use case context does not match any other defined value, or where the context is unknown or cannot be determined.
BT_AUDIO_CONTEXT_TYPE_CONVERSATIONAL	Conversation between humans, for example, in telephony or video calls, including traditional cellular as well as VoIP and Push-to-Talk.
BT_AUDIO_CONTEXT_TYPE_MEDIA	Media, for example, music playback, radio, podcast or movie soundtrack, or tv audio.
BT_AUDIO_CONTEXT_TYPE_GAME	Audio associated with video gaming, for example gaming media; gaming effects; music and in-game voice chat between participants; or a mix of all the above.
BT_AUDIO_CONTEXT_TYPE_INSTRUCTIONAL	Instructional audio, for example, in navigation, announcements, or user guidance.
BT_AUDIO_CONTEXT_TYPE_VOICE_ASSISTANTS	Man-machine communication, for example, with voice recognition or virtual assistants.
BT_AUDIO_CONTEXT_TYPE_LIVE	Live audio, for example, from a microphone where audio is perceived both through a direct acoustic path and through an LE Audio Stream.
BT_AUDIO_CONTEXT_TYPE_SOUND_EFFECTS	Sound effects including keyboard and touch feedback; menu and user interface sounds; and other system sounds.
BT_AUDIO_CONTEXT_TYPE_NOTIFICATIONS	Notification and reminder sounds; attention-seeking audio, for example, in beeps signaling the arrival of a message.
BT_AUDIO_CONTEXT_TYPE_RINGTONE	Alerts the user to an incoming call, for example, an incoming telephony or video call, including traditional cellular as well as VoIP and Push-to-Talk.
BT_AUDIO_CONTEXT_TYPE_ALERTS	Alarms and timers; immediate alerts, for example, in a critical battery alarm, timer expiry or alarm clock, toaster, cooker, kettle, microwave, etc.
BT_AUDIO_CONTEXT_TYPE_EMERGENCY_ALARM	Emergency alarm Emergency sounds, for example, fire alarms or other urgent alerts.

◆ bt_audio_dir

enum bt_audio_dir

#include <zephyr/bluetooth/audio/audio.h>

Audio direction from the perspective of the BAP Unicast Server / BAP Broadcast Sink.

Enumerator

BT_AUDIO_DIR_SINK

Audio direction sink.

For a BAP Unicast Client or Broadcast Source this is considered outgoing audio (TX). For a BAP Unicast Server or Broadcast Sink this is considered incoming audio (RX).

BT_AUDIO_DIR_SOURCE

Audio direction source.

For a BAP Unicast Client or Broadcast Source this is considered incoming audio (RX). For a BAP Unicast Server or Broadcast Sink this is considered outgoing audio (TX).

◆ bt_audio_location

enum bt_audio_location

#include <zephyr/bluetooth/audio/audio.h>

Location values for BT Audio.

These values are defined by the Generic Audio Assigned Numbers, bluetooth.com

Enumerator
BT_AUDIO_LOCATION_MONO_AUDIO	Mono Audio (no specified Audio Location)
BT_AUDIO_LOCATION_FRONT_LEFT	Front Left.
BT_AUDIO_LOCATION_FRONT_RIGHT	Front Right.
BT_AUDIO_LOCATION_FRONT_CENTER	Front Center.
BT_AUDIO_LOCATION_LOW_FREQ_EFFECTS_1	Low Frequency Effects 1.
BT_AUDIO_LOCATION_BACK_LEFT	Back Left.
BT_AUDIO_LOCATION_BACK_RIGHT	Back Right.
BT_AUDIO_LOCATION_FRONT_LEFT_OF_CENTER	Front Left of Center.
BT_AUDIO_LOCATION_FRONT_RIGHT_OF_CENTER	Front Right of Center.
BT_AUDIO_LOCATION_BACK_CENTER	Back Center.
BT_AUDIO_LOCATION_LOW_FREQ_EFFECTS_2	Low Frequency Effects 2.
BT_AUDIO_LOCATION_SIDE_LEFT	Side Left.
BT_AUDIO_LOCATION_SIDE_RIGHT	Side Right.
BT_AUDIO_LOCATION_TOP_FRONT_LEFT	Top Front Left.
BT_AUDIO_LOCATION_TOP_FRONT_RIGHT	Top Front Right.
BT_AUDIO_LOCATION_TOP_FRONT_CENTER	Top Front Center.
BT_AUDIO_LOCATION_TOP_CENTER	Top Center.
BT_AUDIO_LOCATION_TOP_BACK_LEFT	Top Back Left.
BT_AUDIO_LOCATION_TOP_BACK_RIGHT	Top Back Right.
BT_AUDIO_LOCATION_TOP_SIDE_LEFT	Top Side Left.
BT_AUDIO_LOCATION_TOP_SIDE_RIGHT	Top Side Right.
BT_AUDIO_LOCATION_TOP_BACK_CENTER	Top Back Center.
BT_AUDIO_LOCATION_BOTTOM_FRONT_CENTER	Bottom Front Center.
BT_AUDIO_LOCATION_BOTTOM_FRONT_LEFT	Bottom Front Left.
BT_AUDIO_LOCATION_BOTTOM_FRONT_RIGHT	Bottom Front Right.
BT_AUDIO_LOCATION_FRONT_LEFT_WIDE	Front Left Wide.
BT_AUDIO_LOCATION_FRONT_RIGHT_WIDE	Front Right Wide.
BT_AUDIO_LOCATION_LEFT_SURROUND	Left Surround.
BT_AUDIO_LOCATION_RIGHT_SURROUND	Right Surround.

◆ bt_audio_metadata_type

enum bt_audio_metadata_type

#include <zephyr/bluetooth/audio/audio.h>

Codec metadata type IDs.

Metadata types defined by the Generic Audio assigned numbers (bluetooth.com).

Enumerator
BT_AUDIO_METADATA_TYPE_PREF_CONTEXT	Preferred audio context. Bitfield of preferred audio contexts. If 0, the context type is not a preferred use case for this codec configuration. See the BT_AUDIO_CONTEXT_* for valid values.
BT_AUDIO_METADATA_TYPE_STREAM_CONTEXT	Streaming audio context. Bitfield of streaming audio contexts. If 0, the context type is not a preferred use case for this codec configuration. See the BT_AUDIO_CONTEXT_* for valid values.
BT_AUDIO_METADATA_TYPE_PROGRAM_INFO	UTF-8 encoded title or summary of stream content.
BT_AUDIO_METADATA_TYPE_LANG	Language. 3 octet lower case language code defined by ISO 639-3 Possible values can be found at https://iso639-3.sil.org/code_tables/639/data
BT_AUDIO_METADATA_TYPE_CCID_LIST	Array of 8-bit CCID values.
BT_AUDIO_METADATA_TYPE_PARENTAL_RATING	Parental rating. See bt_audio_parental_rating for valid values.
BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI	UTF-8 encoded URI for additional Program information.
BT_AUDIO_METADATA_TYPE_AUDIO_STATE	Audio active state. See bt_audio_active_state for valid values.
BT_AUDIO_METADATA_TYPE_BROADCAST_IMMEDIATE	Broadcast Audio Immediate Rendering flag
BT_AUDIO_METADATA_TYPE_ASSISTED_LISTENING_STREAM	Assisted listening stream. See bt_audio_assisted_listening_stream for valid values.
BT_AUDIO_METADATA_TYPE_BROADCAST_NAME	UTF-8 encoded Broadcast name.
BT_AUDIO_METADATA_TYPE_EXTENDED	Extended metadata.
BT_AUDIO_METADATA_TYPE_VENDOR	Vendor specific metadata.

◆ bt_audio_parental_rating

enum bt_audio_parental_rating

#include <zephyr/bluetooth/audio/audio.h>

Parental rating defined by the Generic Audio assigned numbers (bluetooth.com).

The numbering scheme is aligned with Annex F of EN 300 707 v1.2.1 which defined parental rating for viewing.

Enumerator
BT_AUDIO_PARENTAL_RATING_NO_RATING	No rating.
BT_AUDIO_PARENTAL_RATING_AGE_ANY	For all ages.
BT_AUDIO_PARENTAL_RATING_AGE_5_OR_ABOVE	Recommended for listeners of age 5 and above.
BT_AUDIO_PARENTAL_RATING_AGE_6_OR_ABOVE	Recommended for listeners of age 6 and above.
BT_AUDIO_PARENTAL_RATING_AGE_7_OR_ABOVE	Recommended for listeners of age 7 and above.
BT_AUDIO_PARENTAL_RATING_AGE_8_OR_ABOVE	Recommended for listeners of age 8 and above.
BT_AUDIO_PARENTAL_RATING_AGE_9_OR_ABOVE	Recommended for listeners of age 9 and above.
BT_AUDIO_PARENTAL_RATING_AGE_10_OR_ABOVE	Recommended for listeners of age 10 and above.
BT_AUDIO_PARENTAL_RATING_AGE_11_OR_ABOVE	Recommended for listeners of age 11 and above.
BT_AUDIO_PARENTAL_RATING_AGE_12_OR_ABOVE	Recommended for listeners of age 12 and above.
BT_AUDIO_PARENTAL_RATING_AGE_13_OR_ABOVE	Recommended for listeners of age 13 and above.
BT_AUDIO_PARENTAL_RATING_AGE_14_OR_ABOVE	Recommended for listeners of age 14 and above.
BT_AUDIO_PARENTAL_RATING_AGE_15_OR_ABOVE	Recommended for listeners of age 15 and above.
BT_AUDIO_PARENTAL_RATING_AGE_16_OR_ABOVE	Recommended for listeners of age 16 and above.
BT_AUDIO_PARENTAL_RATING_AGE_17_OR_ABOVE	Recommended for listeners of age 17 and above.
BT_AUDIO_PARENTAL_RATING_AGE_18_OR_ABOVE	Recommended for listeners of age 18 and above.

Function Documentation

◆ bt_audio_data_get_val()

int bt_audio_data_get_val	(	const uint8_t	ltv_data[],
		size_t	size,
		uint8_t	type,
		const uint8_t **	data )

#include <zephyr/bluetooth/audio/audio.h>

Get the value of a specific data type in an length-type-value data array.

Parameters

[in]	ltv_data	The array containing the length-type-value tuples
[in]	size	The size of `ltv_data`
[in]	type	The type to get the value for. May be any type, but typically either bt_audio_codec_cap_type, bt_audio_codec_cfg_type or bt_audio_metadata_type.
[out]	data	Pointer to the data-pointer to update when item is found. Any found data will be little endian.

Return values

length	The length of found `data` (may be 0).
-EINVAL	Arguments are invalid
-ENODATA	Data not found

◆ bt_audio_data_parse()

int bt_audio_data_parse	(	const uint8_t	ltv[],
		size_t	size,
		bool(*	func )(struct bt_data data, void user_data),
		void *	user_data )

#include <zephyr/bluetooth/audio/audio.h>

Helper for parsing length-type-value data.

Parameters

ltv	Length-type-value (LTV) encoded data.
size	Size of the `ltv` data.
func	Callback function which will be called for each element that's found in the data. The callback should return true to continue parsing, or false to stop parsing.
user_data	User data to be passed to the callback.

Return values

0	All entries were parsed.
-EINVAL	The data is incorrectly encoded
-ECANCELED	Parsing was prematurely cancelled by the callback

◆ bt_audio_get_chan_count()

uint8_t bt_audio_get_chan_count ( enum bt_audio_location chan_allocation )

#include <zephyr/bluetooth/audio/audio.h>

Function to get the number of channels from the channel allocation.

Parameters

chan_allocation The channel allocation

Returns: The number of channels

Topics

Data Structures

Macros

Enumerations

Functions

Unicast Announcement Type

Detailed Description

Macro Definition Documentation

◆ BT_AUDIO_BROADCAST_ID_MAX

◆ BT_AUDIO_BROADCAST_ID_SIZE

◆ BT_AUDIO_BROADCAST_NAME_LEN_MAX

◆ BT_AUDIO_BROADCAST_NAME_LEN_MIN

◆ BT_AUDIO_CODEC_CAP

◆ BT_AUDIO_CODEC_CAP_CHAN_COUNT_MAX

◆ BT_AUDIO_CODEC_CAP_CHAN_COUNT_MIN

◆ BT_AUDIO_CODEC_CAP_CHAN_COUNT_SUPPORT

◆ BT_AUDIO_CODEC_CFG

◆ BT_AUDIO_CODEC_DATA

◆ BT_AUDIO_CONTEXT_TYPE_ANY

◆ BT_AUDIO_LANG_SIZE

◆ BT_AUDIO_LOCATION_ANY

◆ BT_AUDIO_METADATA_TYPE_IS_KNOWN

◆ BT_AUDIO_PD_MAX

◆ BT_AUDIO_PD_PREF_NONE

◆ BT_AUDIO_RTN_PREF_NONE

◆ BT_AUDIO_UNICAST_ANNOUNCEMENT_GENERAL

◆ BT_AUDIO_UNICAST_ANNOUNCEMENT_TARGETED

Enumeration Type Documentation

◆ bt_audio_active_state

◆ bt_audio_assisted_listening_stream

◆ bt_audio_codec_cap_chan_count

◆ bt_audio_codec_cap_frame_dur

◆ bt_audio_codec_cap_freq

◆ bt_audio_codec_cap_type

◆ bt_audio_codec_cfg_frame_dur

◆ bt_audio_codec_cfg_freq

◆ bt_audio_codec_cfg_type

◆ bt_audio_context

◆ bt_audio_dir

◆ bt_audio_location

◆ bt_audio_metadata_type

◆ bt_audio_parental_rating

Function Documentation

◆ bt_audio_data_get_val()

◆ bt_audio_data_parse()

◆ bt_audio_get_chan_count()