Data Structures
struct	bt_audio_discover_params

struct	bt_audio_unicast_group_param
	Parameter struct for the unicast group functions. More...

Typedefs
typedef void(*	bt_audio_discover_func_t) (struct bt_conn conn, struct bt_codec codec, struct bt_audio_ep ep, struct bt_audio_discover_params params)
	Discover Audio capabilities and endpoints callback function. More...

Functions
int	bt_audio_discover (struct bt_conn conn, struct bt_audio_discover_params params)
	Discover remote capabilities and endpoints. More...

int	bt_audio_stream_config (struct bt_conn conn, struct bt_audio_stream stream, struct bt_audio_ep ep, struct bt_codec codec)
	Configure Audio Stream. More...

int	bt_audio_stream_reconfig (struct bt_audio_stream stream, const struct bt_codec codec)
	Reconfigure Audio Stream. More...

int	bt_audio_stream_qos (struct bt_conn conn, struct bt_audio_unicast_group group)
	Configure Audio Stream QoS. More...

int	bt_audio_stream_enable (struct bt_audio_stream stream, struct bt_codec_data meta, size_t meta_count)
	Enable Audio Stream. More...

int	bt_audio_stream_metadata (struct bt_audio_stream stream, struct bt_codec_data meta, size_t meta_count)
	Change Audio Stream Metadata. More...

int	bt_audio_stream_disable (struct bt_audio_stream *stream)
	Disable Audio Stream. More...

int	bt_audio_stream_start (struct bt_audio_stream *stream)
	Start Audio Stream. More...

int	bt_audio_stream_stop (struct bt_audio_stream *stream)
	Stop Audio Stream. More...

int	bt_audio_stream_release (struct bt_audio_stream *stream)
	Release Audio Stream. More...

int	bt_audio_stream_send (struct bt_audio_stream stream, struct net_buf buf, uint32_t seq_num, uint32_t ts)
	Send data to Audio stream. More...

int	bt_audio_unicast_group_create (struct bt_audio_unicast_group_param params[], size_t num_param, struct bt_audio_unicast_group **unicast_group)
	Create audio unicast group. More...

int	bt_audio_unicast_group_add_streams (struct bt_audio_unicast_group *unicast_group, struct bt_audio_unicast_group_param params[], size_t num_param)
	Add streams to a unicast group as a unicast client. More...

int	bt_audio_unicast_group_delete (struct bt_audio_unicast_group *unicast_group)
	Delete audio unicast group. More...

Detailed Description

Typedef Documentation

◆ bt_audio_discover_func_t

bt_audio_discover_func_t

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

Discover Audio capabilities and endpoints callback function.

If discovery procedure has complete both cap and ep are set to NULL.

Function Documentation

◆ bt_audio_discover()

int bt_audio_discover	(	struct bt_conn *	conn,
		struct bt_audio_discover_params *	params
	)

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

Discover remote capabilities and endpoints.

This procedure is used by a client to discover remote capabilities and endpoints and notifies via params callback.

Note: This procedure is asynchronous therefore the parameters need to remains valid while it is active.

Parameters

conn	Connection object
params	Discover parameters

◆ bt_audio_stream_config()

int bt_audio_stream_config	(	struct bt_conn *	conn,
		struct bt_audio_stream *	stream,
		struct bt_audio_ep *	ep,
		struct bt_codec *	codec
	)

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

Configure Audio Stream.

This procedure is used by a client to configure a new stream using the remote endpoint, local capability and codec configuration.

Parameters

conn	Connection object
stream	Stream object being configured
ep	Remote Audio Endpoint being configured
codec	Codec configuration

Returns: Allocated Audio Stream object or NULL in case of error.

◆ bt_audio_stream_disable()

int bt_audio_stream_disable ( struct bt_audio_stream * stream )

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

Disable Audio Stream.

This procedure is used by a unicast client or unicast server to disable a stream.

This shall only be called for unicast streams, as broadcast streams will always be enabled once created.

Parameters

stream Stream object

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_stream_enable()

int bt_audio_stream_enable	(	struct bt_audio_stream *	stream,
		struct bt_codec_data *	meta,
		size_t	meta_count
	)

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

Enable Audio Stream.

This procedure is used by a client to enable a stream.

This shall only be called for unicast streams, as broadcast streams will always be enabled once created.

Parameters

stream	Stream object
meta_count	Number of metadata entries
meta	Metadata entries

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_stream_metadata()

int bt_audio_stream_metadata	(	struct bt_audio_stream *	stream,
		struct bt_codec_data *	meta,
		size_t	meta_count
	)

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

Change Audio Stream Metadata.

This procedure is used by a unicast client or unicast server to change the metadata of a stream.

Parameters

stream	Stream object
meta_count	Number of metadata entries
meta	Metadata entries

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_stream_qos()

int bt_audio_stream_qos	(	struct bt_conn *	conn,
		struct bt_audio_unicast_group *	group
	)

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

Configure Audio Stream QoS.

This procedure is used by a client to configure the Quality of Service of streams in a unicast group. All streams in the group for the specified conn will have the Quality of Service configured. This shall only be used to configure unicast streams.

Parameters

conn	Connection object
group	Unicast group object

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_stream_reconfig()

int bt_audio_stream_reconfig	(	struct bt_audio_stream *	stream,
		const struct bt_codec *	codec
	)

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

Reconfigure Audio Stream.

This procedure is used by a unicast client or unicast server to reconfigure a stream to use a different local codec configuration.

This can only be done for unicast streams.

Parameters

stream	Stream object being reconfigured
codec	Codec configuration

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_stream_release()

int bt_audio_stream_release ( struct bt_audio_stream * stream )

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

Release Audio Stream.

This procedure is used by a unicast client or unicast server to release a unicast stream.

Broadcast sink streams cannot be released, but can be deleted by bt_audio_broadcast_sink_delete(). Broadcast source streams cannot be released, but can be deleted by bt_audio_broadcast_source_delete().

Parameters

stream Stream object

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_stream_send()

int bt_audio_stream_send	(	struct bt_audio_stream *	stream,
		struct net_buf *	buf,
		uint32_t	seq_num,
		uint32_t	ts
	)

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

Send data to Audio stream.

Send data from buffer to the stream.

Note: Data will not be sent to linked streams since linking is only consider for procedures affecting the state machine.

Parameters

stream	Stream object.
buf	Buffer containing data to be sent.
seq_num	Packet Sequence number. This value shall be incremented for each call to this function and at least once per SDU interval for a specific channel.
ts	Timestamp of the SDU in microseconds (us). This value can be used to transmit multiple SDUs in the same SDU interval in a CIG or BIG. Can be omitted by using BT_ISO_TIMESTAMP_NONE which will simply enqueue the ISO SDU in a FIFO manner.

Returns: Bytes sent in case of success or negative value in case of error.

◆ bt_audio_stream_start()

int bt_audio_stream_start ( struct bt_audio_stream * stream )

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

Start Audio Stream.

This procedure is used by a unicast client or unicast server to make a stream start streaming.

This shall only be called for unicast streams. Broadcast sinks will always be started once synchronized, and broadcast source streams shall be started with bt_audio_broadcast_source_start().

Parameters

stream Stream object

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_stream_stop()

int bt_audio_stream_stop ( struct bt_audio_stream * stream )

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

Stop Audio Stream.

This procedure is used by a client to make a stream stop streaming.

This shall only be called for unicast streams. Broadcast sinks cannot be stopped. Broadcast sources shall be stopped with bt_audio_broadcast_source_stop().

Parameters

stream Stream object

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_unicast_group_add_streams()

int bt_audio_unicast_group_add_streams	(	struct bt_audio_unicast_group *	unicast_group,
		struct bt_audio_unicast_group_param	params[],
		size_t	num_param
	)

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

Add streams to a unicast group as a unicast client.

This function can be used to add additional streams to a bt_audio_unicast_group.

This can be called at any time before any of the streams in the group has been started (see bt_audio_stream_ops.started()). This can also be called after the streams have been stopped (see bt_audio_stream_ops.stopped()).

Once a stream has been added to a unicast group, it cannot be removed. To remove a stream from a group, the group must be deleted with bt_audio_unicast_group_delete(), but this will require all streams in the group to be released first.

Parameters

unicast_group	Pointer to the unicast group
params	Array of stream parameters with streams being added to the group.
num_param	Number of paramers in `params`.

Returns: 0 in case of success or negative value in case of error.

◆ bt_audio_unicast_group_create()

int bt_audio_unicast_group_create	(	struct bt_audio_unicast_group_param	params[],
		size_t	num_param,
		struct bt_audio_unicast_group **	unicast_group
	)

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

Create audio unicast group.

Create a new audio unicast group with one or more audio streams as a unicast client. Streams in a unicast group shall share the same interval, framing and latency (see bt_codec_qos).

Parameters

[in]	params	Array of stream parameters being used for the group.
[in]	num_param	Number of parameters in `params`.
[out]	unicast_group	Pointer to the unicast group created

Returns: Zero on success or (negative) error code otherwise.

◆ bt_audio_unicast_group_delete()

int bt_audio_unicast_group_delete ( struct bt_audio_unicast_group * unicast_group )

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

Delete audio unicast group.

Delete a audio unicast group as a client. All streams in the group shall be in the idle or configured state.

Parameters

unicast_group Pointer to the unicast group to delete

Returns: Zero on success or (negative) error code otherwise.

Data Structures

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ bt_audio_discover_func_t

Function Documentation

◆ bt_audio_discover()

◆ bt_audio_stream_config()

◆ bt_audio_stream_disable()

◆ bt_audio_stream_enable()

◆ bt_audio_stream_metadata()

◆ bt_audio_stream_qos()

◆ bt_audio_stream_reconfig()

◆ bt_audio_stream_release()

◆ bt_audio_stream_send()

◆ bt_audio_stream_start()

◆ bt_audio_stream_stop()

◆ bt_audio_unicast_group_add_streams()

◆ bt_audio_unicast_group_create()

◆ bt_audio_unicast_group_delete()