| /****************************************************************************** |
| * |
| * Copyright (C) 2003-2012 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * This interface file contains the interface to the Audio Video Control |
| * Transport Protocol (AVCTP). |
| * |
| ******************************************************************************/ |
| #ifndef AVCT_API_H |
| #define AVCT_API_H |
| |
| #include "bt_target.h" |
| #include "bt_types.h" |
| |
| /***************************************************************************** |
| * Constants |
| ****************************************************************************/ |
| |
| /* API function return value result codes. */ |
| #define AVCT_SUCCESS 0 /* Function successful */ |
| #define AVCT_NO_RESOURCES 1 /* Not enough resources */ |
| #define AVCT_BAD_HANDLE 2 /* Bad handle */ |
| #define AVCT_PID_IN_USE 3 /* PID already in use */ |
| #define AVCT_NOT_OPEN 4 /* Connection not open */ |
| |
| /* PSM for AVCT. */ |
| #define AVCT_PSM 0x0017 |
| #define AVCT_BR_PSM 0x001B |
| |
| /* Protocol revision numbers */ |
| #define AVCT_REV_1_0 0x0100 |
| #define AVCT_REV_1_2 0x0102 |
| #define AVCT_REV_1_3 0x0103 |
| #define AVCT_REV_1_4 0x0104 |
| |
| /* the layer_specific settings */ |
| #define AVCT_DATA_CTRL 0x0001 /* for the control channel */ |
| #define AVCT_DATA_BROWSE 0x0002 /* for the browsing channel */ |
| #define AVCT_DATA_PARTIAL 0x0100 /* Only have room for a partial message */ |
| |
| /* Per the AVRC spec, minimum MTU for the control channel */ |
| #define AVCT_MIN_CONTROL_MTU 48 |
| /* Per the AVRC spec, minimum MTU for the browsing channel */ |
| #define AVCT_MIN_BROWSE_MTU 335 |
| |
| /* Message offset. The number of bytes needed by the protocol stack for the |
| * protocol headers of an AVCTP message packet. |
| */ |
| #define AVCT_MSG_OFFSET 15 |
| #define AVCT_BROWSE_OFFSET 17 /* the default offset for browsing channel */ |
| |
| /* Connection role. */ |
| #define AVCT_INT 0 /* Initiator connection */ |
| #define AVCT_ACP 1 /* Acceptor connection */ |
| |
| /* Control role. */ |
| #define AVCT_TARGET 1 /* target */ |
| #define AVCT_CONTROL 2 /* controller */ |
| #define AVCT_PASSIVE 4 /* If conflict, allow the other side to succeed */ |
| |
| /* Command/Response indicator. */ |
| #define AVCT_CMD 0 /* Command message */ |
| #define AVCT_RSP 2 /* Response message */ |
| #define AVCT_REJ 3 /* Message rejected */ |
| |
| /* Control callback events. */ |
| #define AVCT_CONNECT_CFM_EVT 0 /* Connection confirm */ |
| #define AVCT_CONNECT_IND_EVT 1 /* Connection indication */ |
| #define AVCT_DISCONNECT_CFM_EVT 2 /* Disconnect confirm */ |
| #define AVCT_DISCONNECT_IND_EVT 3 /* Disconnect indication */ |
| #define AVCT_CONG_IND_EVT 4 /* Congestion indication */ |
| #define AVCT_UNCONG_IND_EVT 5 /* Uncongestion indication */ |
| #define AVCT_BROWSE_CONN_CFM_EVT 6 /* Browse Connection confirm */ |
| #define AVCT_BROWSE_CONN_IND_EVT 7 /* Browse Connection indication */ |
| #define AVCT_BROWSE_DISCONN_CFM_EVT 8 /* Browse Disconnect confirm */ |
| #define AVCT_BROWSE_DISCONN_IND_EVT 9 /* Browse Disconnect indication */ |
| #define AVCT_BROWSE_CONG_IND_EVT 10 /* Congestion indication */ |
| #define AVCT_BROWSE_UNCONG_IND_EVT 11 /* Uncongestion indication */ |
| |
| /* General purpose failure result code for callback events. */ |
| #define AVCT_RESULT_FAIL 5 |
| |
| /***************************************************************************** |
| * Type Definitions |
| ****************************************************************************/ |
| |
| /* Control callback function. */ |
| typedef void(tAVCT_CTRL_CBACK)(uint8_t handle, uint8_t event, uint16_t result, |
| BD_ADDR peer_addr); |
| |
| /* Message callback function */ |
| /* p_pkt->layer_specific is AVCT_DATA_CTRL or AVCT_DATA_BROWSE */ |
| typedef void(tAVCT_MSG_CBACK)(uint8_t handle, uint8_t label, uint8_t cr, |
| BT_HDR* p_pkt); |
| |
| /* Structure used by AVCT_CreateConn. */ |
| typedef struct { |
| tAVCT_CTRL_CBACK* p_ctrl_cback; /* Control callback */ |
| tAVCT_MSG_CBACK* p_msg_cback; /* Message callback */ |
| uint16_t pid; /* Profile ID */ |
| uint8_t role; /* Initiator/acceptor role */ |
| uint8_t control; /* Control role (Control/Target) */ |
| } tAVCT_CC; |
| |
| /***************************************************************************** |
| * External Function Declarations |
| ****************************************************************************/ |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_Register |
| * |
| * Description This is the system level registration function for the |
| * AVCTP protocol. This function initializes AVCTP and |
| * prepares the protocol stack for its use. This function |
| * must be called once by the system or platform using AVCTP |
| * before the other functions of the API an be used. |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| extern void AVCT_Register(uint16_t mtu, uint16_t mtu_br, uint8_t sec_mask); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_Deregister |
| * |
| * Description This function is called to deregister use AVCTP protocol. |
| * It is called when AVCTP is no longer being used by any |
| * application in the system. Before this function can be |
| * called, all connections must be removed with |
| * AVCT_RemoveConn(). |
| * |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| extern void AVCT_Deregister(void); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_CreateConn |
| * |
| * Description Create an AVCTP connection. There are two types of |
| * connections, initiator and acceptor, as determined by |
| * the p_cc->role parameter. When this function is called to |
| * create an initiator connection, an AVCTP connection to |
| * the peer device is initiated if one does not already exist. |
| * If an acceptor connection is created, the connection waits |
| * passively for an incoming AVCTP connection from a peer |
| * device. |
| * |
| * |
| * Returns AVCT_SUCCESS if successful, otherwise error. |
| * |
| ******************************************************************************/ |
| extern uint16_t AVCT_CreateConn(uint8_t* p_handle, tAVCT_CC* p_cc, |
| BD_ADDR peer_addr); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_RemoveConn |
| * |
| * Description Remove an AVCTP connection. This function is called when |
| * the application is no longer using a connection. If this |
| * is the last connection to a peer the L2CAP channel for AVCTP |
| * will be closed. |
| * |
| * |
| * Returns AVCT_SUCCESS if successful, otherwise error. |
| * |
| ******************************************************************************/ |
| extern uint16_t AVCT_RemoveConn(uint8_t handle); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_CreateBrowse |
| * |
| * Description Create an AVCTP connection. There are two types of |
| * connections, initiator and acceptor, as determined by |
| * the p_cc->role parameter. When this function is called to |
| * create an initiator connection, an AVCTP connection to |
| * the peer device is initiated if one does not already exist. |
| * If an acceptor connection is created, the connection waits |
| * passively for an incoming AVCTP connection from a peer |
| * device. |
| * |
| * |
| * Returns AVCT_SUCCESS if successful, otherwise error. |
| * |
| ******************************************************************************/ |
| extern uint16_t AVCT_CreateBrowse(uint8_t handle, uint8_t role); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_RemoveBrowse |
| * |
| * Description Remove an AVCTP connection. This function is called when |
| * the application is no longer using a connection. If this |
| * is the last connection to a peer the L2CAP channel for AVCTP |
| * will be closed. |
| * |
| * |
| * Returns AVCT_SUCCESS if successful, otherwise error. |
| * |
| ******************************************************************************/ |
| extern uint16_t AVCT_RemoveBrowse(uint8_t handle); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_GetBrowseMtu |
| * |
| * Description Get the peer_mtu for the AVCTP Browse channel of the given |
| * connection. |
| * |
| * Returns the peer browsing channel MTU. |
| * |
| ******************************************************************************/ |
| extern uint16_t AVCT_GetBrowseMtu(uint8_t handle); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_GetPeerMtu |
| * |
| * Description Get the peer_mtu for the AVCTP channel of the given |
| * connection. |
| * |
| * Returns the peer MTU size. |
| * |
| ******************************************************************************/ |
| extern uint16_t AVCT_GetPeerMtu(uint8_t handle); |
| |
| /******************************************************************************* |
| * |
| * Function AVCT_MsgReq |
| * |
| * Description Send an AVCTP message to a peer device. In calling |
| * AVCT_MsgReq(), the application should keep track of the |
| * congestion state of AVCTP as communicated with events |
| * AVCT_CONG_IND_EVT and AVCT_UNCONG_IND_EVT. If the |
| * application calls AVCT_MsgReq() when AVCTP is congested |
| * the message may be discarded. The application may make its |
| * first call to AVCT_MsgReq() after it receives an |
| * AVCT_CONNECT_CFM_EVT or AVCT_CONNECT_IND_EVT on control |
| * channel or |
| * AVCT_BROWSE_CONN_CFM_EVT or AVCT_BROWSE_CONN_IND_EVT on |
| * browsing channel. |
| * |
| * p_msg->layer_specific must be set to |
| * AVCT_DATA_CTRL for control channel traffic; |
| * AVCT_DATA_BROWSE for for browse channel traffic. |
| * |
| * Returns AVCT_SUCCESS if successful, otherwise error. |
| * |
| ******************************************************************************/ |
| extern uint16_t AVCT_MsgReq(uint8_t handle, uint8_t label, uint8_t cr, |
| BT_HDR* p_msg); |
| |
| #endif /* AVCT_API_H */ |
