Bluetooth AVRCP(Audio/Video Remote Control Profile) API provides functions for notifying the change of target device to the control device(Target role) and functions for controlling the remote device(Controller role).

Required Header

#include <bluetooth.h>

Overview

AVRCP profile let users send AV control signals and information between two devices.

Functions
int	bt_avrcp_set_equalizer_state_changed_cb (bt_avrcp_equalizer_state_changed_cb callback, void *user_data)
	Registers a callback function that will be invoked when the equalizer state is changed.
int	bt_avrcp_unset_equalizer_state_changed_cb (void)
	Unregisters a callback function that will be invoked when the equalizer state is changed.
int	bt_avrcp_set_repeat_mode_changed_cb (bt_avrcp_repeat_mode_changed_cb callback, void *user_data)
	Registers a callback function that will be invoked when the repeat mode is changed.
int	bt_avrcp_unset_repeat_mode_changed_cb (void)
	Unregisters a callback function that will be invoked when the repeat mode is changed.
int	bt_avrcp_set_shuffle_mode_changed_cb (bt_avrcp_shuffle_mode_changed_cb callback, void *user_data)
	Registers a callback function that will be invoked when the shuffle mode is changed.
int	bt_avrcp_unset_shuffle_mode_changed_cb (void)
	Unregisters a callback function that will be invoked when the shuffle mode is changed.
int	bt_avrcp_set_scan_mode_changed_cb (bt_avrcp_scan_mode_changed_cb callback, void *user_data)
	Registers a callback function that will be invoked when the scan mode is changed.
int	bt_avrcp_unset_scan_mode_changed_cb (void)
	Unregisters a callback function that will be invoked when the scan mode is changed.
int	bt_avrcp_set_position_changed_cb (bt_avrcp_position_changed_cb callback, void *user_data)
	Registers a callback function that will be invoked when the song position is changed.
int	bt_avrcp_unset_position_changed_cb (void)
	Unregisters a callback function that will be invoked when the song position is changed.
int	bt_avrcp_set_play_status_changed_cb (bt_avrcp_play_status_changed_cb callback, void *user_data)
	Registers a callback function that will be invoked when the Play status is changed.
int	bt_avrcp_unset_play_status_changed_cb (void)
	Unregisters a callback function that will be invoked when the Play status is changed.
int	bt_avrcp_set_track_info_changed_cb (bt_avrcp_track_info_changed_cb callback, void *user_data)
	Registers a callback function that will be invoked when the track metadata is changed.
int	bt_avrcp_unset_track_info_changed_cb (void)
	Unregisters a callback function that will be invoked when the track metadata is changed.
Typedefs
typedef void(*	bt_avrcp_control_connection_state_changed_cb )(bool connected, const char remote_address, void user_data)
	Called when the connection state is changed.
typedef void(*	bt_avrcp_position_changed_cb )(unsigned int position, void *user_data)
	Called when the Song position mode is changed by the remote target device.
typedef void(*	bt_avrcp_track_info_changed_cb )(bt_avrcp_metadata_attributes_info_s track, void user_data)
	Called when the Song metadata information is changed by the remote target device.
typedef void(*	bt_avrcp_play_status_changed_cb )(bt_avrcp_player_state_e play_state, void *user_data)
	Called when the Song Play status mode is changed by the remote target device.
typedef void(*	bt_avrcp_target_connection_state_changed_cb )(bool connected, const char remote_address, void user_data)
	Called when the connection state is changed.
typedef void(*	bt_avrcp_equalizer_state_changed_cb )(bt_avrcp_equalizer_state_e equalizer, void *user_data)
	Called when the equalizer state is changed by the remote control device.
typedef void(*	bt_avrcp_repeat_mode_changed_cb )(bt_avrcp_repeat_mode_e repeat, void *user_data)
	Called when the repeat mode is changed by the remote control device.
typedef void(*	bt_avrcp_shuffle_mode_changed_cb )(bt_avrcp_shuffle_mode_e shuffle, void *user_data)
	Called when the shuffle mode is changed by the remote control device.
typedef void(*	bt_avrcp_scan_mode_changed_cb )(bt_avrcp_scan_mode_e scan, void *user_data)
	Called when the scan mode is changed by the remote control device.

Typedef Documentation

typedef void(* bt_avrcp_control_connection_state_changed_cb)(bool connected, const char *remote_address, void *user_data)

Called when the connection state is changed.

Since :: 3.0

Parameters:

[in]	connected	The state to be changed. true means connected state, Otherwise, false.
[in]	remote_address	The remote address
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_control_initialize(); bt_avrcp_control_deinitialize()

typedef void(* bt_avrcp_equalizer_state_changed_cb)(bt_avrcp_equalizer_state_e equalizer, void *user_data)

Called when the equalizer state is changed by the remote control device.

Since :: 2.3.1

Parameters:

[in]	equalizer	The equalizer state
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_set_equalizer_state_changed_cb(); bt_avrcp_unset_equalizer_state_changed_cb()

typedef void(* bt_avrcp_play_status_changed_cb)(bt_avrcp_player_state_e play_state, void *user_data)

Called when the Song Play status mode is changed by the remote target device.

Since :: 3.0

Parameters:

[in]	play_state	The song play status
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_set_play_status_changed_cb(); bt_avrcp_unset_play_status_changed_cb()

typedef void(* bt_avrcp_position_changed_cb)(unsigned int position, void *user_data)

Called when the Song position mode is changed by the remote target device.

Since :: 3.0

Parameters:

[in]	position	Playback position in milliseconds. When position is 0 it means the track is starting and when it's greater than or equal to track's duration the track has ended.
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_set_position_changed_cb(); bt_avrcp_unset_position_changed_cb()

typedef void(* bt_avrcp_repeat_mode_changed_cb)(bt_avrcp_repeat_mode_e repeat, void *user_data)

Called when the repeat mode is changed by the remote control device.

Since :: 2.3.1

Parameters:

[in]	repeat	The repeat mode
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_set_repeat_mode_changed_cb(); bt_avrcp_unset_repeat_mode_changed_cb()

typedef void(* bt_avrcp_scan_mode_changed_cb)(bt_avrcp_scan_mode_e scan, void *user_data)

Called when the scan mode is changed by the remote control device.

Since :: 2.3.1

Parameters:

[in]	shuffle	The shuffle mode
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_set_scan_mode_changed_cb(); bt_avrcp_unset_scan_mode_changed_cb()

typedef void(* bt_avrcp_shuffle_mode_changed_cb)(bt_avrcp_shuffle_mode_e shuffle, void *user_data)

Called when the shuffle mode is changed by the remote control device.

Since :: 2.3.1

Parameters:

[in]	shuffle	The shuffle mode
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_set_shuffle_mode_changed_cb(); bt_avrcp_unset_shuffle_mode_changed_cb()

typedef void(* bt_avrcp_target_connection_state_changed_cb)(bool connected, const char *remote_address, void *user_data)

Called when the connection state is changed.

Since :: 2.3.1

Parameters:

[in]	connected	The state to be changed. true means connected state, Otherwise, false.
[in]	remote_address	The remote address
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_target_initialize(); bt_avrcp_target_deinitialize()

typedef void(* bt_avrcp_track_info_changed_cb)(bt_avrcp_metadata_attributes_info_s *track, void *user_data)

Called when the Song metadata information is changed by the remote target device.

Since :: 3.0

Parameters:

[in]	track	The song metadata information
[in]	user_data	The user data passed from the callback registration function

See also:: bt_avrcp_set_track_info_changed_cb(); bt_avrcp_unset_track_info_changed_cb()

Enumeration Type Documentation

enum bt_avrcp_equalizer_state_e

Enumerations for the equalizer state.

Since :: 3.0

Enumerator:

BT_AVRCP_EQUALIZER_STATE_OFF	Equalizer Off
BT_AVRCP_EQUALIZER_STATE_ON	Equalizer On

enum bt_avrcp_player_command_e

Enumeration for the player control commands.

Since :: 3.0

Enumerator:

BT_AVRCP_CONTROL_PLAY	Play
BT_AVRCP_CONTROL_PAUSE	Pause
BT_AVRCP_CONTROL_STOP	Stop
BT_AVRCP_CONTROL_NEXT	Next Track
BT_AVRCP_CONTROL_PREVIOUS	Previous track
BT_AVRCP_CONTROL_FAST_FORWARD	Fast Forward
BT_AVRCP_CONTROL_REWIND	Rewind

enum bt_avrcp_player_state_e

Enumerations for the player state.

Since :: 3.0

Enumerator:

BT_AVRCP_PLAYER_STATE_STOPPED	Stopped
BT_AVRCP_PLAYER_STATE_PLAYING	Playing
BT_AVRCP_PLAYER_STATE_PAUSED	Paused
BT_AVRCP_PLAYER_STATE_FORWARD_SEEK	Seek Forward
BT_AVRCP_PLAYER_STATE_REWIND_SEEK	Seek Rewind

enum bt_avrcp_repeat_mode_e

Enumerations for the repeat mode.

Since :: 3.0

Enumerator:

BT_AVRCP_REPEAT_MODE_OFF	Repeat Off
BT_AVRCP_REPEAT_MODE_SINGLE_TRACK	Single track repeat
BT_AVRCP_REPEAT_MODE_ALL_TRACK	All track repeat
BT_AVRCP_REPEAT_MODE_GROUP	Group repeat

enum bt_avrcp_scan_mode_e

Enumerations for the scan mode.

Since :: 3.0

Enumerator:

BT_AVRCP_SCAN_MODE_OFF	Scan Off
BT_AVRCP_SCAN_MODE_ALL_TRACK	All tracks scan
BT_AVRCP_SCAN_MODE_GROUP	Group scan

enum bt_avrcp_shuffle_mode_e

Enumerations for the shuffle mode.

Since :: 3.0

Enumerator:

BT_AVRCP_SHUFFLE_MODE_OFF	Shuffle Off
BT_AVRCP_SHUFFLE_MODE_ALL_TRACK	All tracks shuffle
BT_AVRCP_SHUFFLE_MODE_GROUP	Group shuffle

Function Documentation

int bt_avrcp_set_equalizer_state_changed_cb	(	bt_avrcp_equalizer_state_changed_cb	callback,
		void *	user_data
	)

Registers a callback function that will be invoked when the equalizer state is changed.

Since :: 2.4

Parameters:

[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_INVALID_PARAMETER	Invalid parameter
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_unset_equalizer_state_changed_cb()

int bt_avrcp_set_play_status_changed_cb	(	bt_avrcp_play_status_changed_cb	callback,
		void *	user_data
	)

Registers a callback function that will be invoked when the Play status is changed.

Since :: 3.0

Parameters:

[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_INVALID_PARAMETER	Invalid parameter
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_unset_play_status_changed_cb()

int bt_avrcp_set_position_changed_cb	(	bt_avrcp_position_changed_cb	callback,
		void *	user_data
	)

Registers a callback function that will be invoked when the song position is changed.

Since :: 3.0

Parameters:

[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_INVALID_PARAMETER	Invalid parameter
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_set_position_changed_cb()

int bt_avrcp_set_repeat_mode_changed_cb	(	bt_avrcp_repeat_mode_changed_cb	callback,
		void *	user_data
	)

Registers a callback function that will be invoked when the repeat mode is changed.

Since :: 2.4

Parameters:

[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_INVALID_PARAMETER	Invalid parameter
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_unset_repeat_mode_changed_cb()

int bt_avrcp_set_scan_mode_changed_cb	(	bt_avrcp_scan_mode_changed_cb	callback,
		void *	user_data
	)

Registers a callback function that will be invoked when the scan mode is changed.

Since :: 2.4

Parameters:

[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_INVALID_PARAMETER	Invalid parameter
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_unset_scan_mode_changed_cb()

int bt_avrcp_set_shuffle_mode_changed_cb	(	bt_avrcp_shuffle_mode_changed_cb	callback,
		void *	user_data
	)

Registers a callback function that will be invoked when the shuffle mode is changed.

Since :: 2.4

Parameters:

[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_INVALID_PARAMETER	Invalid parameter
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_unset_shuffle_mode_changed_cb()

int bt_avrcp_set_track_info_changed_cb	(	bt_avrcp_track_info_changed_cb	callback,
		void *	user_data
	)

Registers a callback function that will be invoked when the track metadata is changed.

Since :: 3.0

Parameters:

[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_INVALID_PARAMETER	Invalid parameter
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_unset_track_info_changed_cb()

int bt_avrcp_unset_equalizer_state_changed_cb ( void )

Unregisters a callback function that will be invoked when the equalizer state is changed.

Since :: 2.4

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_set_equalizer_state_changed_cb()

int bt_avrcp_unset_play_status_changed_cb ( void )

Unregisters a callback function that will be invoked when the Play status is changed.

Since :: 3.0

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_unset_play_status_changed_cb()

int bt_avrcp_unset_position_changed_cb ( void )

Unregisters a callback function that will be invoked when the song position is changed.

Since :: 3.0

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_set_position_changed_cb()

int bt_avrcp_unset_repeat_mode_changed_cb ( void )

Unregisters a callback function that will be invoked when the repeat mode is changed.

Since :: 2.4

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_set_repeat_mode_changed_cb()

int bt_avrcp_unset_scan_mode_changed_cb ( void )

Unregisters a callback function that will be invoked when the scan mode is changed.

Since :: 2.4

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_set_scan_mode_changed_cb()

int bt_avrcp_unset_shuffle_mode_changed_cb ( void )

Unregisters a callback function that will be invoked when the shuffle mode is changed.

Since :: 2.4

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_set_shuffle_mode_changed_cb()

int bt_avrcp_unset_track_info_changed_cb ( void )

Unregisters a callback function that will be invoked when the track metadata is changed.

Since :: 3.0

Returns:: 0 on success, otherwise a negative error value

Return values:

BT_ERROR_NONE	Successful
BT_ERROR_NOT_INITIALIZED	Not initialized
BT_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The AVRCP service must be initialized with bt_avrcp_target_initialize() or bt_avrcp_control_initialize().

See also:: bt_avrcp_target_initialize(); bt_avrcp_control_initialize(); bt_avrcp_set_track_info_changed_cb()

Required Header

Overview

Functions

Typedefs

Typedef Documentation

Enumeration Type Documentation

Function Documentation