1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_INCLUDE_BT_AV_H 18 #define ANDROID_INCLUDE_BT_AV_H 19 20 __BEGIN_DECLS 21 22 /* Bluetooth AV connection states */ 23 typedef enum { 24 BTAV_CONNECTION_STATE_DISCONNECTED = 0, 25 BTAV_CONNECTION_STATE_CONNECTING, 26 BTAV_CONNECTION_STATE_CONNECTED, 27 BTAV_CONNECTION_STATE_DISCONNECTING 28 } btav_connection_state_t; 29 30 /* Bluetooth AV datapath states */ 31 typedef enum { 32 BTAV_AUDIO_STATE_REMOTE_SUSPEND = 0, 33 BTAV_AUDIO_STATE_STOPPED, 34 BTAV_AUDIO_STATE_STARTED, 35 } btav_audio_state_t; 36 37 38 /** Callback for connection state change. 39 * state will have one of the values from btav_connection_state_t 40 */ 41 typedef void (* btav_connection_state_callback)(btav_connection_state_t state, 42 bt_bdaddr_t *bd_addr); 43 44 /** Callback for audiopath state change. 45 * state will have one of the values from btav_audio_state_t 46 */ 47 typedef void (* btav_audio_state_callback)(btav_audio_state_t state, 48 bt_bdaddr_t *bd_addr); 49 50 /** BT-AV callback structure. */ 51 typedef struct { 52 /** set to sizeof(btav_callbacks_t) */ 53 size_t size; 54 btav_connection_state_callback connection_state_cb; 55 btav_audio_state_callback audio_state_cb; 56 } btav_callbacks_t; 57 58 /** 59 * NOTE: 60 * 61 * 1. AVRCP 1.0 shall be supported initially. AVRCP passthrough commands 62 * shall be handled internally via uinput 63 * 64 * 2. A2DP data path shall be handled via a socket pipe between the AudioFlinger 65 * android_audio_hw library and the Bluetooth stack. 66 * 67 */ 68 /** Represents the standard BT-AV interface. */ 69 typedef struct { 70 71 /** set to sizeof(btav_interface_t) */ 72 size_t size; 73 /** 74 * Register the BtAv callbacks 75 */ 76 bt_status_t (*init)( btav_callbacks_t* callbacks ); 77 78 /** connect to headset */ 79 bt_status_t (*connect)( bt_bdaddr_t *bd_addr ); 80 81 /** dis-connect from headset */ 82 bt_status_t (*disconnect)( bt_bdaddr_t *bd_addr ); 83 84 /** Closes the interface. */ 85 void (*cleanup)( void ); 86 } btav_interface_t; 87 88 __END_DECLS 89 90 #endif /* ANDROID_INCLUDE_BT_AV_H */ 91
