1 /* 2 * Copyright 2018 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_HEARING_AID_H 18 #define ANDROID_INCLUDE_BT_HEARING_AID_H 19 20 #include <hardware/bluetooth.h> 21 22 namespace bluetooth { 23 namespace hearing_aid { 24 25 enum class ConnectionState { 26 DISCONNECTED = 0, 27 CONNECTING, 28 CONNECTED, 29 DISCONNECTING 30 }; 31 32 class HearingAidCallbacks { 33 public: 34 virtual ~HearingAidCallbacks() = default; 35 36 /** Callback for profile connection state change */ 37 virtual void OnConnectionState(ConnectionState state, 38 const RawAddress& address) = 0; 39 40 /** Callback for device being available. Is executed when devices are loaded 41 * from storage on stack bringup, and when new device is connected to profile. 42 * Main purpose of this callback is to keep its users informed of device 43 * capabilities and hiSyncId. 44 */ 45 virtual void OnDeviceAvailable(uint8_t capabilities, uint64_t hiSyncId, 46 const RawAddress& address) = 0; 47 }; 48 49 class HearingAidInterface { 50 public: 51 virtual ~HearingAidInterface() = default; 52 53 /** Register the Hearing Aid callbacks */ 54 virtual void Init(HearingAidCallbacks* callbacks) = 0; 55 56 /** Connect to Hearing Aid */ 57 virtual void Connect(const RawAddress& address) = 0; 58 59 /** Disconnect from Hearing Aid */ 60 virtual void Disconnect(const RawAddress& address) = 0; 61 62 /** Set the volume */ 63 virtual void SetVolume(int8_t volume) = 0; 64 65 /** Closes the interface. */ 66 virtual void Cleanup(void) = 0; 67 68 /* Called when Hearing Aid is unbonded. */ 69 virtual void RemoveDevice(const RawAddress& address) = 0; 70 }; 71 72 } // namespace hearing_aid 73 } // namespace bluetooth 74 75 #endif /* ANDROID_INCLUDE_BT_HEARING_AID_H */ 76
