This section describes the API's of Audio/Video Distribution Transport protocol. More...

Data Structures
struct	wiced_bt_avdt_sender_info_t
	AVDT sender report. More...

struct	wiced_bt_avdt_report_blk_t
	AVDT receiver report. More...

union	wiced_bt_avdt_report_data_t
	AVDT report. More...

struct	wiced_bt_avdt_reg_t
	AVDT subsytem configuration. More...

struct	wiced_bt_avdt_sep_info_t
	Stream endpoint information. More...

struct	wiced_bt_avdt_cfg_t
	Stream endpoint configuration. More...

struct	wiced_bt_avdt_evt_hdr_t
	Header for AVDT event callback data. More...

struct	wiced_bt_avdt_config_t
	Data for AVDT_GETCAP_CFM_EVT, AVDT_RECONFIG_IND_EVT, and AVDT_RECONFIG_CFM_EVT. More...

struct	wiced_bt_avdt_setconfig_t
	Data for AVDT_CONFIG_IND_EVT. More...

struct	wiced_bt_avdt_open_t
	This data structure is associated with the AVDT_OPEN_IND_EVT and AVDT_OPEN_CFM_EVT. More...

struct	wiced_bt_avdt_security_t
	Data for AVDT_SECURITY_IND_EVT and AVDT_SECURITY_CFM_EVT. More...

struct	wiced_bt_avdt_discover_t
	Data for AVDT_DISCOVER_CFM_EVT. More...

struct	wiced_bt_avdt_delay_rpt_t
	Data for AVDT_DELAY_REPORT_EVT. More...

struct	wiced_bt_avdt_write_cfm_t
	This data structure is associated with the AVDT_WRITE_CFM_EVT. More...

union	wiced_bt_avdt_ctrl_t
	Data for AVDT event notifications. More...

struct	wiced_bt_avdt_cs_t
	This structure contains information required when a stream is created. More...

Macros
#define	AVDT_VERSION_DELAYREPORT AVDT_VERSION_1_3
	AVDTP version when feature was added. More...

#define	AVDT_VERSION_CP AVDT_VERSION_1_2
	Content Protection.

#define	AVDT_CODEC_TYPE_INDEX 2
	The index to access the codec type in codec_info[]. More...

#define	AVDT_AL_HDR_SIZE 3
	The size in bytes of a Adaptation Layer header. More...

#define	AVDT_MEDIA_HDR_SIZE 12
	The size in bytes of a media packet header. More...

#define	AVDT_MEDIA_CP_HDR_SIZE 1
	The size, in byte, of the SCMS Header. More...

#define	AVDT_MAX_MEDIA_SIZE (0xFFFF - AVDT_MEDIA_HDR_SIZE)
	AVDTP 7.5.3 Adaptation Layer Fragmentation original length of the un-fragmented transport packet should be specified by two bytes length field of Adaptation Layer Header. More...

#define	AVDT_MULTI_AV_HANDLE 0xFF
	The handle is used when reporting MULTI_AV specific events. More...

#define	AVDT_MEDIA_OFFSET 23
	The number of bytes needed by the protocol stack for the protocol headers of a media packet. More...

#define	AVDT_MARKER_SET 0x80
	The marker bit is used by the application to mark significant events such as frame boundaries in the data stream. More...

#define	AVDT_INT 0
	AVDT initiator/acceptor role for adaption. More...

#define	AVDT_ACP 1
	AVDT acceptor.

#define	AVDT_RTCP_SDES_CNAME 1
	SDES item CNAME.

#define	AVDT_MAX_CNAME_SIZE 28
	Max AVDT command name length.

#define	AVDT_MAX_EVT (AVDT_DELAY_REPORT_CFM_EVT)
	Maximum processed event id.

#define	AVDT_PSM 0x0019
	PSM for AVDT. More...

#define	AVDT_CODEC_SIZE 14
	Codec Size. More...

#define	AVDT_PROTECT_SIZE 90
	Max content protection info size.

Typedefs
typedef void(	wiced_bt_avdt_ctrl_cback_t )(uint8_t handle, wiced_bt_device_address_t bd_addr, uint8_t event, wiced_bt_avdt_ctrl_t *p_data)
	AVDT control callback This function passes control events to the application. More...

typedef void(	wiced_bt_avdt_data_cback_t )(uint8_t handle, uint16_t seq, uint32_t time_stamp, uint8_t m_pt, uint8_t *p_rx_media, uint16_t media_len)
	AVDT data callback It is executed when AVDTP has a media packet ready for the application. More...

typedef uint16_t(	wiced_bt_avdt_getcap_req_t )(wiced_bt_device_address_t bd_addr, uint8_t seid, wiced_bt_avdt_cfg_t p_cfg, wiced_bt_avdt_ctrl_cback_t p_cback)
	AVDT get capability request It is executed to retrieve the AVDT stream capabilities of remote device. More...

Functions
uint16_t	wiced_bt_avdt_register (wiced_bt_avdt_reg_t p_reg, wiced_bt_avdt_ctrl_cback_t p_cback)
	Initialize AVDTP subsystem and register callback for event notification. More...

void	wiced_bt_avdt_deregister (void)
	Called to deregister use AVDTP protocol. More...

uint16_t	wiced_bt_avdt_create_stream (uint8_t p_handle, wiced_bt_avdt_cs_t p_cs)
	Create a stream endpoint. More...

uint16_t	wiced_bt_avdt_remove_stream (uint8_t handle)
	Remove a stream endpoint. More...

uint16_t	wiced_bt_avdt_update_stream (uint8_t sep_type, wiced_bool_t available)
	Change all the sink SEPs to available or unavailable This function can only be called if there is no active stream connection to the stream type to be updated. More...

uint16_t	wiced_bt_avdt_discover_req (wiced_bt_device_address_t bd_addr, wiced_bt_avdt_sep_info_t p_sep_info, uint8_t max_seps, wiced_bt_avdt_ctrl_cback_t p_cback)
	This function initiates a connection to the AVDTP service on the peer device, if not already present, and discovers the stream endpoints on the peer device. More...

uint16_t	wiced_bt_avdt_get_cap_req (wiced_bt_device_address_t bd_addr, uint8_t seid, wiced_bt_avdt_cfg_t p_cfg, wiced_bt_avdt_ctrl_cback_t p_cback)
	This function initiates a connection to the AVDTP service on the peer device, if not already present, and gets the capabilities of a stream endpoint on the peer device. More...

uint16_t	wiced_bt_avdt_get_all_cap_req (wiced_bt_device_address_t bd_addr, uint8_t seid, wiced_bt_avdt_cfg_t p_cfg, wiced_bt_avdt_ctrl_cback_t p_cback)
	This function initiates a connection to the AVDTP service on the peer device, if not already present, and gets the capabilities of a stream endpoint on the peer device. More...

uint16_t	wiced_bt_avdt_delay_report (uint8_t handle, uint8_t seid, uint16_t delay)
	This functions sends a Delay Report to the peer device that is associated with a particular SEID. More...

uint16_t	wiced_bt_avdt_open_req (uint8_t handle, wiced_bt_device_address_t bd_addr, uint8_t seid, wiced_bt_avdt_cfg_t *p_cfg)
	This function initiates a connection to the AVDTP service on the peer device, if not already present, and connects to a stream endpoint on a peer device. More...

uint16_t	wiced_bt_avdt_config_rsp (uint8_t handle, uint8_t label, uint8_t error_code, uint8_t category)
	Respond to a configure request from the peer device. More...

uint16_t	wiced_bt_avdt_security_set_scms (uint8_t handle, wiced_bool_t enable, uint8_t scms_hdr)
	Set the SCMS Content Protection. More...

uint16_t	wiced_bt_avdt_start_req (uint8_t *p_handles, uint8_t num_handles)
	Start one or more stream endpoints. More...

uint16_t	wiced_bt_avdt_start_resp (uint8_t handle, uint8_t label, uint8_t status)
	Sends A2DP start response . More...

uint16_t	wiced_bt_avdt_suspend_req (uint8_t *p_handles, uint8_t num_handles)
	Suspend one or more stream endpoints. More...

uint16_t	wiced_bt_avdt_close_req (uint8_t handle)
	Description Close a stream endpoint. More...

uint16_t	wiced_bt_avdt_reconfig_req (uint8_t handle, wiced_bt_avdt_cfg_t *p_cfg)
	Reconfigure a stream endpoint. More...

uint16_t	wiced_bt_avdt_reconfig_rsp (uint8_t handle, uint8_t label, uint8_t error_code, uint8_t category)
	Respond to a reconfigure request from the peer device. More...

uint16_t	wiced_bt_avdt_security_req (uint8_t handle, uint8_t *p_data, uint16_t len)
	Send a security request to the peer device. More...

uint16_t	wiced_bt_avdt_security_rsp (uint8_t handle, uint8_t label, uint8_t error_code, uint8_t *p_data, uint16_t len)
	Respond to a security request from the peer device. More...

uint16_t	wiced_bt_avdt_write_req (uint8_t handle, uint8_t *p_media_buf, uint16_t buf_len, uint32_t time_stamp, uint8_t m_pt, wiced_bt_avdt_data_opt_mask_t opt)
	Send a media packet to the peer device. More...

uint16_t	wiced_bt_avdt_connect_req (wiced_bt_device_address_t bd_addr, uint8_t sec_mask, wiced_bt_avdt_ctrl_cback_t *p_cback)
	This function initiates an AVDTP signaling connection to the peer device. More...

uint16_t	wiced_bt_avdt_disconnect_req (wiced_bt_device_address_t bd_addr, wiced_bt_avdt_ctrl_cback_t *p_cback)
	This function disconnect an AVDTP signaling connection to the peer device. More...

uint16_t	wiced_bt_avdt_get_l2cap_channel (uint8_t handle)
	Get the L2CAP CID used by the handle. More...

uint16_t	wiced_bt_avdt_get_signal_channel (uint8_t handle, wiced_bt_device_address_t bd_addr)
	Get the L2CAP CID used by the signal channel of the given handle. More...

uint16_t	wiced_bt_avdt_set_media_buf (uint8_t handle, uint8_t *p_buf, uint32_t buf_len)
	Assigns buffer for media packets or forbids using of assigned buffer if argument p_buf is NULL. More...

uint16_t	wiced_bt_avdt_send_report (uint8_t handle, AVDT_REPORT_TYPE type, wiced_bt_avdt_report_data_t *p_data)
	Sends report packet. More...

AVDT protocol versions.
Avdt protocol versions.
#define	AVDT_VERSION_1_0 0x0100
	AVDT Version 1.0.

#define	AVDT_VERSION_1_2 0x0102
	AVDT Version 1.2.

#define	AVDT_VERSION_1_3 0x0103
	AVDT Version 1.3.

stack supported AVDT protocol versions.
Avdt protocol version supported by stack.
#define	AVDT_VERSION AVDT_VERSION_1_3
	Avdt protocol version supported by stack.

AVDT result codes.
API function return value result codes.
#define	AVDT_SUCCESS 0
	Function successful.

#define	AVDT_BAD_PARAMS 1
	Invalid parameters.

#define	AVDT_NO_RESOURCES 2
	Not enough resources.

#define	AVDT_BAD_HANDLE 3
	Bad handle.

#define	AVDT_BUSY 4
	A procedure is already in progress.

#define	AVDT_WRITE_FAIL 5
	Write failed.

AVDT SEP types.
Stream endpoint type.
#define	AVDT_TSEP_SRC 0
	Source.

#define	AVDT_TSEP_SNK 1
	Sink.

Media types
Media types
#define	AVDT_MEDIA_AUDIO 0
	Audio SEP.

#define	AVDT_MEDIA_VIDEO 1
	Video SEP.

#define	AVDT_MEDIA_MULTI 2
	Multimedia SEP.

AVDT report types.
for reporting packets
typedef uint8_t	AVDT_REPORT_TYPE
	AVDT report type.

#define	AVDT_RTCP_PT_SR 200
	the packet type - SR (Sender Report)

#define	AVDT_RTCP_PT_RR 201
	the packet type - RR (Receiver Report)

#define	AVDT_RTCP_PT_SDES 202
	the packet type - SDES (Source Description)

Protocol service capabilities
Protocol service capabilities
#define	AVDT_PSC_TRANS (1<<1)
	Media transport.

#define	AVDT_PSC_REPORT (1<<2)
	Reporting.

#define	AVDT_PSC_RECOV (1<<3)
	Recovery.

#define	AVDT_PSC_CP (1<<4)
	Content protection.

#define	AVDT_PSC_HDRCMP (1<<5)
	Header compression.

#define	AVDT_PSC_MUX (1<<6)
	Multiplexing.

#define	AVDT_PSC_CODEC (1<<7)
	Codec.

#define	AVDT_PSC_DELAY_RPT (1<<8)
	Delay Report.

Recovery type
Recovery type
#define	AVDT_RECOV_RFC2733 1
	RFC2733 recovery.

Header compression capabilities mask
Header compression capabilities mask
#define	AVDT_HDRCMP_MEDIA (1<<5)
	Available for media packets.

#define	AVDT_HDRCMP_RECOV (1<<6)
	Available for recovery packets.

#define	AVDT_HDRCMP_BACKCH (1<<7)
	Back channel supported.

Multiplexing capabilities mask
Multiplexing capabilities mask
#define	AVDT_MUX_FRAG (1<<7)
	Allow Adaptation Layer Fragmentation.

AVDT application service category
Application service category. This indicates the application service category.
#define	AVDT_ASC_PROTECT 4
	Content protection.

#define	AVDT_ASC_CODEC 7
	Codec.

AVDT content protection type
AVDT content protection type
#define	AVDT_CP_TYPE_NONE 0
	Content protection not in use.

#define	AVDT_CP_TYPE_DTCP 0x0001
	Content protection DTCP.

#define	AVDT_CP_TYPE_SCMST 0x0002
	Content protection SCMS-T.

AVDT Error codes
The following are error codes defined in the AVDTP and GAVDP specifications. These error codes communicate protocol errors between AVDTP and the application. More detailed descriptions of the error codes and their appropriate use can be found in the AVDTP and GAVDP specifications. These error codes are unrelated to the result values returned by the AVDTP API functions.
#define	AVDT_ERR_HEADER 0x01
	Bad packet header format.

#define	AVDT_ERR_LENGTH 0x11
	Bad packet length.

#define	AVDT_ERR_SEID 0x12
	Invalid SEID.

#define	AVDT_ERR_IN_USE 0x13
	The SEP is in use.

#define	AVDT_ERR_NOT_IN_USE 0x14
	The SEP is not in use.

#define	AVDT_ERR_CATEGORY 0x17
	Bad service category.

#define	AVDT_ERR_PAYLOAD 0x18
	Bad payload format.

#define	AVDT_ERR_NSC 0x19
	Requested command not supported.

#define	AVDT_ERR_INVALID_CAP 0x1A
	Reconfigure attempted invalid capabilities.

#define	AVDT_ERR_RECOV_TYPE 0x22
	Requested recovery type not defined.

#define	AVDT_ERR_MEDIA_TRANS 0x23
	Media transport capability not correct.

#define	AVDT_ERR_RECOV_FMT 0x25
	Recovery service capability not correct.

#define	AVDT_ERR_ROHC_FMT 0x26
	Header compression service capability not correct.

#define	AVDT_ERR_CP_FMT 0x27
	Content protection service capability not correct.

#define	AVDT_ERR_MUX_FMT 0x28
	Multiplexing service capability not correct.

#define	AVDT_ERR_UNSUP_CFG 0x29
	Configuration not supported.

#define	AVDT_ERR_BAD_STATE 0x31
	Message cannot be processed in this state.

#define	AVDT_ERR_REPORT_FMT 0x65
	Report service capability not correct.

#define	AVDT_ERR_SERVICE 0x80
	Invalid service category.

#define	AVDT_ERR_RESOURCE 0x81
	Insufficient resources.

#define	AVDT_ERR_INVALID_MCT 0xC1
	Invalid Media Codec Type.

#define	AVDT_ERR_UNSUP_MCT 0xC2
	Unsupported Media Codec Type.

#define	AVDT_ERR_INVALID_LEVEL 0xC3
	Invalid Level.

#define	AVDT_ERR_UNSUP_LEVEL 0xC4
	Unsupported Level.

#define	AVDT_ERR_INVALID_CP 0xE0
	Invalid Content Protection Type.

#define	AVDT_ERR_INVALID_FORMAT 0xE1
	Invalid Content Protection format.

#define	AVDT_ERR_CONNECT 0x07
	Connection failed. More...

#define	AVDT_ERR_TIMEOUT 0x08
	Response timeout. More...

AVDT Events

#define	AVDT_DISCOVER_CFM_EVT 0
	Discover confirm.

#define	AVDT_GETCAP_CFM_EVT 1
	Get capabilities confirm.

#define	AVDT_OPEN_CFM_EVT 2
	Open confirm.

#define	AVDT_OPEN_IND_EVT 3
	Open indication.

#define	AVDT_CONFIG_IND_EVT 4
	Configuration indication.

#define	AVDT_START_CFM_EVT 5
	Start confirm.

#define	AVDT_START_IND_EVT 6
	Start indication.

#define	AVDT_SUSPEND_CFM_EVT 7
	Suspend confirm.

#define	AVDT_SUSPEND_IND_EVT 8
	Suspend indication.

#define	AVDT_CLOSE_CFM_EVT 9
	Close confirm.

#define	AVDT_CLOSE_IND_EVT 10
	Close indication.

#define	AVDT_RECONFIG_CFM_EVT 11
	Reconfiguration confirm.

#define	AVDT_RECONFIG_IND_EVT 12
	Reconfiguration indication.

#define	AVDT_SECURITY_CFM_EVT 13
	Security confirm.

#define	AVDT_SECURITY_IND_EVT 14
	Security indication.

#define	AVDT_WRITE_CFM_EVT 15
	Write confirm.

#define	AVDT_CONNECT_IND_EVT 16
	Signaling channel connected.

#define	AVDT_DISCONNECT_IND_EVT 17
	Signaling channel disconnected.

#define	AVDT_REPORT_CONN_EVT 18
	Reporting channel connected.

#define	AVDT_REPORT_DISCONN_EVT 19
	Reporting channel disconnected.

#define	AVDT_DELAY_REPORT_EVT 20
	Delay report received.

#define	AVDT_DELAY_REPORT_CFM_EVT 21
	Delay report response received.

Non-supported commands
Non-supported protocol command messages (used in wiced_bt_avdt_cs_t)
#define	AVDT_NSC_SUSPEND 0x01
	Suspend command not supported.

#define	AVDT_NSC_RECONFIG 0x02
	Reconfigure command not supported.

#define	AVDT_NSC_SECURITY 0x04
	Security command not supported.

AVDT data option mask
AVDT data option mask is used in the write request
typedef uint8_t	wiced_bt_avdt_data_opt_mask_t
	AVDT data opt mask.

#define	AVDT_DATA_OPT_NONE 0x00
	No option still add RTP header.

#define	AVDT_DATA_OPT_NO_RTP (0x01 << 0)
	Skip adding RTP header.

Detailed Description

This section describes the API's of Audio/Video Distribution Transport protocol.

Macro Definition Documentation

#define AVDT_AL_HDR_SIZE 3

The size in bytes of a Adaptation Layer header.

Adaptation layer header size

#define AVDT_CODEC_SIZE 14

Codec Size.

AVDT codec size

#define AVDT_CODEC_TYPE_INDEX 2

The index to access the codec type in codec_info[].

Index in codec_info[]

#define AVDT_ERR_CONNECT 0x07

Connection failed.

#define AVDT_ERR_TIMEOUT 0x08

Response timeout.

#define AVDT_INT 0

AVDT initiator/acceptor role for adaption.

AVDT initiator

#define AVDT_MARKER_SET 0x80

The marker bit is used by the application to mark significant events such as frame boundaries in the data stream.

This constant is used to check or set the marker bit in the m_pt parameter of an wiced_bt_avdt_write_req() or AVDT_DATA_IND_EVT.AVDT Market bit

#define AVDT_MAX_MEDIA_SIZE (0xFFFF - AVDT_MEDIA_HDR_SIZE)

AVDTP 7.5.3 Adaptation Layer Fragmentation original length of the un-fragmented transport packet should be specified by two bytes length field of Adaptation Layer Header.

AVDT maximum size of media packet

#define AVDT_MEDIA_CP_HDR_SIZE 1

The size, in byte, of the SCMS Header.

Media Content protection header size

#define AVDT_MEDIA_HDR_SIZE 12

The size in bytes of a media packet header.

Media packet header size

#define AVDT_MEDIA_OFFSET 23

The number of bytes needed by the protocol stack for the protocol headers of a media packet.

This is the size of the media packet header, the L2CAP packet header and HCI header.Media packet header size including l2cap & HCI headers

#define AVDT_MULTI_AV_HANDLE 0xFF

The handle is used when reporting MULTI_AV specific events.

AVDT Handle for MULTI_AV events

#define AVDT_PSM 0x0019

PSM for AVDT.

AVDT PSM value

#define AVDT_VERSION_DELAYREPORT AVDT_VERSION_1_3

AVDTP version when feature was added.

Delay Reporting

Typedef Documentation

typedef void( wiced_bt_avdt_ctrl_cback_t)(uint8_t handle, wiced_bt_device_address_t bd_addr, uint8_t event, wiced_bt_avdt_ctrl_t *p_data)

AVDT control callback This function passes control events to the application.

This function is required for all registered stream endpoints and for the AVDT_DiscoverReq() and AVDT_GetCapReq() functions.

Parameters

[in]	handle	: AVDT connection handle
[in]	bd_addr	: Peer address
[in]	event	: AVDT event (see AVDT events)
[in]	p_data	: AVDT event data

Returns: Nothing

typedef void( wiced_bt_avdt_data_cback_t)(uint8_t handle, uint16_t seq, uint32_t time_stamp, uint8_t m_pt, uint8_t *p_rx_media, uint16_t media_len)

AVDT data callback It is executed when AVDTP has a media packet ready for the application.

This function is required for SNK endpoints and not applicable for SRC endpoints.

Parameters

[in]	handle	: AVDT connection handle
[in]	seq	: Seuence number
[in]	time_stamp	: Data packet time stamp
[in]	m_pt	: Marker and payload type byte
[in]	p_rx_media	: Pointer to the received media content
[in]	media_len	: Length of received media

Returns: Nothing

typedef uint16_t( wiced_bt_avdt_getcap_req_t)(wiced_bt_device_address_t bd_addr, uint8_t seid, wiced_bt_avdt_cfg_t *p_cfg, wiced_bt_avdt_ctrl_cback_t *p_cback)

AVDT get capability request It is executed to retrieve the AVDT stream capabilities of remote device.

Parameters

[in]	bd_addr	: bluetooth address of remote device
[in]	seid	: Stream end point id
[in]	p_cfg	: Stream Configuration
[in]	p_cback	: Callback function upon getCapabilityReq completion

Returns: Nothing

Function Documentation

uint16_t wiced_bt_avdt_close_req ( uint8_t handle )

Description Close a stream endpoint.

This stops the transfer of media packets and closes the transport channel associated with this stream endpoint. When the stream is closed, an AVDT_CLOSE_CFM_EVT is sent to the application via the control callback function for this handle.

Parameters

[in] handle : AVDT connection handle

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_config_rsp	(	uint8_t	handle,
		uint8_t	label,
		uint8_t	error_code,
		uint8_t	category
	)

Respond to a configure request from the peer device.

This function must be called if the application receives an AVDT_CONFIG_IND_EVT through its control callback.

Parameters

[in]	handle	: AVDT connection handle
[in]	label	: Transaction label
[in]	error_code	: Error code (see AVDT error codes)
[in]	category	: Service category (see AVDT service categories)

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_connect_req	(	wiced_bt_device_address_t	bd_addr,
		uint8_t	sec_mask,
		wiced_bt_avdt_ctrl_cback_t *	p_cback
	)

This function initiates an AVDTP signaling connection to the peer device.

When the connection is completed, an AVDT_CONNECT_IND_EVT is sent to the application via its control callback function. If the connection attempt fails an AVDT_DISCONNECT_IND_EVT is sent. The security mask parameter overrides the outgoing security mask set in wiced_bt_avdt_register().

Parameters

[in]	bd_addr	: Peer bd_addr
[in]	sec_mask	: Security requirement
[in]	p_cback	: Callback for event notifications

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

Note BD_Address must be in Big Endian format

uint16_t wiced_bt_avdt_create_stream	(	uint8_t *	p_handle,
		wiced_bt_avdt_cs_t *	p_cs
	)

Create a stream endpoint.

After a stream endpoint is created an application can initiate a connection between this endpoint and an endpoint on a peer device. In addition, a peer device can discover, get the capabilities, and connect to this endpoint.

Parameters

[out]	p_handle	: Connection handle (valid if AVRC_SUCCESS is returned)
[in]	p_cs	: Stream configuration

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_delay_report	(	uint8_t	handle,
		uint8_t	seid,
		uint16_t	delay
	)

This functions sends a Delay Report to the peer device that is associated with a particular SEID.

This function is called by SNK device.

Parameters

[in]	handle	: AVDT connection handle
[in]	seid	: Stream end point ID
[in]	delay	: Amount of delay in ms

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

void wiced_bt_avdt_deregister ( void )

Called to deregister use AVDTP protocol.

Before this function can be called, all streams must be removed with wiced_bt_avdt_remove_stream().

uint16_t wiced_bt_avdt_disconnect_req	(	wiced_bt_device_address_t	bd_addr,
		wiced_bt_avdt_ctrl_cback_t *	p_cback
	)

This function disconnect an AVDTP signaling connection to the peer device.

When disconnected an AVDT_DISCONNECT_IND_EVT is sent to the application via its control callback function.

Parameters

[in]	bd_addr	: Peer bd_addr
[in]	p_cback	: Callback for event notifications

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

Note BD_Address must be in Big Endian format

uint16_t wiced_bt_avdt_discover_req	(	wiced_bt_device_address_t	bd_addr,
		wiced_bt_avdt_sep_info_t *	p_sep_info,
		uint8_t	max_seps,
		wiced_bt_avdt_ctrl_cback_t *	p_cback
	)

This function initiates a connection to the AVDTP service on the peer device, if not already present, and discovers the stream endpoints on the peer device.

(Please note that AVDTP discovery is unrelated to SDP discovery). This function can be called at any time regardless of whether there is an AVDTP connection to the peer device.

When discovery is complete, an AVDT_DISCOVER_CFM_EVT is sent to the application via its callback function. The application must not call wiced_bt_avdt_get_cap_req() or wiced_bt_avdt_discover_req() again to the same device until discovery is complete.

The memory addressed by sep_info is allocated by the application. This memory is written to by AVDTP as part of the discovery procedure. This memory must remain accessible until the application receives the AVDT_DISCOVER_CFM_EVT.

Parameters

[in]	bd_addr	: Peer bd_addr
[in]	p_cback	: Callback for discovery results
[in]	max_seps	: Maximun number of stream end point to discover
[out]	p_sep_info	: Pointer to the stream end point

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

Note BD_Address must be in Big Endian format

uint16_t wiced_bt_avdt_get_all_cap_req	(	wiced_bt_device_address_t	bd_addr,
		uint8_t	seid,
		wiced_bt_avdt_cfg_t *	p_cfg,
		wiced_bt_avdt_ctrl_cback_t *	p_cback
	)

This function initiates a connection to the AVDTP service on the peer device, if not already present, and gets the capabilities of a stream endpoint on the peer device.

This function can be called at any time regardless of whether there is an AVDTP connection to the peer device.

When the procedure is complete, an AVDT_GETCAP_CFM_EVT is sent to the application via its callback function. The application must not call wiced_bt_avdt_get_cap_req() or wiced_bt_avdt_discover_req() again until the procedure is complete.

The memory pointed to by p_cfg is allocated by the application. This memory is written to by AVDTP as part of the get capabilities procedure. This memory must remain accessible until the application receives the AVDT_GETCAP_CFM_EVT.

Parameters

[in]	bd_addr	: Peer bd_addr
[in]	seid	: Stream end point ID (From wiced_bt_avdt_discover_req)
[in]	p_cback	: Callback for results
[out]	p_cfg	: Pointer to the stream end point configuration

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

Note BD_Address must be in Big Endian format

uint16_t wiced_bt_avdt_get_cap_req	(	wiced_bt_device_address_t	bd_addr,
		uint8_t	seid,
		wiced_bt_avdt_cfg_t *	p_cfg,
		wiced_bt_avdt_ctrl_cback_t *	p_cback
	)

This function initiates a connection to the AVDTP service on the peer device, if not already present, and gets the capabilities of a stream endpoint on the peer device.

This function can be called at any time regardless of whether there is an AVDTP connection to the peer device.

When the procedure is complete, an AVDT_GETCAP_CFM_EVT is sent to the application via its callback function. The application must not call wiced_bt_avdt_get_cap_req() or wiced_bt_avdt_discover_req() again until the procedure is complete.

The memory pointed to by p_cfg is allocated by the application. This memory is written to by AVDTP as part of the get capabilities procedure. This memory must remain accessible until the application receives the AVDT_GETCAP_CFM_EVT.

Parameters

[in]	bd_addr	: Peer bd_addr
[in]	seid	: Stream end point ID (From wiced_bt_avdt_discover_req)
[in]	p_cback	: Callback for results
[out]	p_cfg	: Pointer to the stream end point configuration

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

Note BD_Address must be in Big Endian format

uint16_t wiced_bt_avdt_get_l2cap_channel ( uint8_t handle )

Get the L2CAP CID used by the handle.

Parameters

[in] handle : AVDT connection handle

Returns: CID if successful, otherwise 0.

uint16_t wiced_bt_avdt_get_signal_channel	(	uint8_t	handle,
		wiced_bt_device_address_t	bd_addr
	)

Get the L2CAP CID used by the signal channel of the given handle.

Parameters

[in]	handle	: AVDT connection handle
[in]	bd_addr	: Peer bd_addr

Returns: CID if successful, otherwise 0.

Note BD_Address must be in Big Endian format

uint16_t wiced_bt_avdt_open_req	(	uint8_t	handle,
		wiced_bt_device_address_t	bd_addr,
		uint8_t	seid,
		wiced_bt_avdt_cfg_t *	p_cfg
	)

This function initiates a connection to the AVDTP service on the peer device, if not already present, and connects to a stream endpoint on a peer device.

When the connection is completed, an AVDT_OPEN_CFM_EVT is sent to the application via the control callback function for this handle.

Parameters

[in]	handle	: AVDT connection handle
[in]	bd_addr	: Peer bd_addr
[in]	seid	: Stream end point ID
[in]	p_cfg	: Pointer to the stream end point configuration

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

Note BD_Address must be in Big Endian format

uint16_t wiced_bt_avdt_reconfig_req	(	uint8_t	handle,
		wiced_bt_avdt_cfg_t *	p_cfg
	)

Reconfigure a stream endpoint.

This allows the application to change the codec or content protection capabilities of a stream endpoint after it has been opened. This function can only be called if the stream is opened but not started or if the stream has been suspended. When the procedure is completed, an AVDT_RECONFIG_CFM_EVT is sent to the application via the control callback function for this handle.

Parameters

[in]	handle	: AVDT connection handle
[in]	p_cfg	: Pointer to the stream end point configuration

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_reconfig_rsp	(	uint8_t	handle,
		uint8_t	label,
		uint8_t	error_code,
		uint8_t	category
	)

Respond to a reconfigure request from the peer device.

This function must be called if the application receives an AVDT_RECONFIG_IND_EVT through its control callback.

Parameters

[in]	handle	: AVDT connection handle
[in]	label	: Transaction label
[in]	error_code	: Error code (see AVDT error codes)
[in]	category	: Service category (see AVDT service categories)

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_register	(	wiced_bt_avdt_reg_t *	p_reg,
		wiced_bt_avdt_ctrl_cback_t *	p_cback
	)

Initialize AVDTP subsystem and register callback for event notification.

This function must be called prior to calling other AVDT APIs.

Parameters

[in]	p_reg	: AVDT registration parameters
[in]	p_cback	: Callback for AVDT event notification

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_remove_stream ( uint8_t handle )

Remove a stream endpoint.

This function is called when the application is no longer using a stream endpoint. If this function is called when the endpoint is connected the connection is closed and then the stream endpoint is removed.

Parameters

[in] handle : Connection handle

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_security_req	(	uint8_t	handle,
		uint8_t *	p_data,
		uint16_t	len
	)

Send a security request to the peer device.

When the security procedure is completed, an AVDT_SECURITY_CFM_EVT is sent to the application via the control callback function for this handle. (Please note that AVDTP security procedures are unrelated to Bluetooth link level security.)

Parameters

[in]	handle	: AVDT connection handle
[in]	p_data	: Pointer to the content protection data
[in]	len	: Length of the data

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_security_rsp	(	uint8_t	handle,
		uint8_t	label,
		uint8_t	error_code,
		uint8_t *	p_data,
		uint16_t	len
	)

Respond to a security request from the peer device.

This function must be called if the application receives an AVDT_SECURITY_IND_EVT through its control callback. (Please note that AVDTP security procedures are unrelated to Bluetooth link level security.)

Parameters

[in]	handle	: AVDT connection handle
[in]	label	: Transaction label
[in]	error_code	: Error code (see AVDT error codes)
[in]	p_data	: Pointer to the content protection data
[in]	len	: Length of the data

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_security_set_scms	(	uint8_t	handle,
		wiced_bool_t	enable,
		uint8_t	scms_hdr
	)

Set the SCMS Content Protection.

This function must be called when the peer device is connected.

Parameters

[in]	handle	: AVDT connection handle
[in]	enable	: If true enable content protection, flase disable
[in]	scms_hdr	: SCMS content protection header

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_send_report	(	uint8_t	handle,
		AVDT_REPORT_TYPE	type,
		wiced_bt_avdt_report_data_t *	p_data
	)

Sends report packet.

Parameters

[in]	handle	: AVDT connection handle
[in]	type	: Report type (see AVDT report types)
[in]	p_data	: Pointer to the report data

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_set_media_buf	(	uint8_t	handle,
		uint8_t *	p_buf,
		uint32_t	buf_len
	)

Assigns buffer for media packets or forbids using of assigned buffer if argument p_buf is NULL.

This function can only be called if the stream is a SNK.

AVDTP uses this buffer to reassemble fragmented media packets. When AVDTP receives a complete media packet, it calls the p_media_cback assigned by wiced_bt_avdt_create_stream(). This function can be called during callback to assign a different buffer for next media packet or can leave the current buffer for next packet.

Parameters

[in]	handle	: AVDT connection handle
[in]	p_buf	: Pointer to the medie buffer
[in]	buf_len	: Size of the buffer

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_start_req	(	uint8_t *	p_handles,
		uint8_t	num_handles
	)

Start one or more stream endpoints.

This initiates the transfer of media packets for the streams. All stream endpoints must previously be opened. When the streams are started, an AVDT_START_CFM_EVT is sent to the application via the control callback function for each stream.

Parameters

[in]	p_handles	: Pointer to the AVDT connection handles, each byte is a connection handle
[in]	num_handles	: Number of connections to start

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_start_resp	(	uint8_t	handle,
		uint8_t	label,
		uint8_t	status
	)

Sends A2DP start response .

This initiates the transfer of media packets for the streams. All stream endpoints must previously be opened.This function must be called if the application receives an AVDT_START_IND_EVT through its control callback.

Parameters

[in]	handle	: AVDT connection handle
[in]	label	: Transaction label
[in]	status	: Indicates if start request is accepted(AVDT_SUCCESS) or rejected(AVDT Error codes)

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_suspend_req	(	uint8_t *	p_handles,
		uint8_t	num_handles
	)

Suspend one or more stream endpoints.

This suspends the transfer of media packets for the streams. All stream endpoints must previously be open and started. When the streams are suspended, an AVDT_SUSPEND_CFM_EVT is sent to the application via the control callback function for each stream.

Parameters

[in]	p_handles	: Pointer to the AVDT connection handles, each byte is a connection handle
[in]	num_handles	: Number of connections to suspend

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_update_stream	(	uint8_t	sep_type,
		wiced_bool_t	available
	)

Change all the sink SEPs to available or unavailable This function can only be called if there is no active stream connection to the stream type to be updated.

Parameters

[in]	sep_type	: (see AVDT sep type)
[in]	available	: If true set all SEPs to available, false set all SEPs to unavailable

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.

uint16_t wiced_bt_avdt_write_req	(	uint8_t	handle,
		uint8_t *	p_media_buf,
		uint16_t	buf_len,
		uint32_t	time_stamp,
		uint8_t	m_pt,
		wiced_bt_avdt_data_opt_mask_t	opt
	)

Send a media packet to the peer device.

The stream must be started before this function is called. Also, this function can only be called if the stream is a SRC.

When AVDTP has sent the media packet, an AVDT_WRITE_CFM_EVT is sent to the application via the control callback. The application can decide whether to wait for the AVDT_WRITE_CFM_EVT, before making the next wiced_bt_avdt_write_req() call. The application may make its first call to wiced_bt_avdt_write_req() after it receives an AVDT_START_CFM_EVT or AVDT_START_IND_EVT.

The opt parameter allows passing specific options like:

NO_RTP : do not add the RTP header to buffer

Parameters

[in]	handle	: AVDT connection handle
[in]	p_media_buf	: Pointer to the media buffer to write
[in]	buf_len	: Size of the buffer
[in]	time_stamp	: Time stamp
[in]	m_pt	: Marker and payload byte
[in]	opt	: Date option mask (see AVDT data options)

Returns: Result code (see AVDT result codes) AVDT_SUCCESS if successful, otherwise error.


			AIROC^™ BTSDK v4.4 - Documentation

Data Structures

Macros

Typedefs

Functions

AVDT protocol versions.

stack supported AVDT protocol versions.

AVDT result codes.

AVDT SEP types.

Media types

AVDT report types.

Protocol service capabilities

Recovery type

Header compression capabilities mask

Multiplexing capabilities mask

AVDT application service category

AVDT content protection type

AVDT Error codes

AVDT Events

Non-supported commands

AVDT data option mask

Detailed Description

Macro Definition Documentation

Typedef Documentation

Function Documentation