Hearing Aid BTIF interface

#define BT_PROFILE_GATT_ID "gatt"

#define BT_PROFILE_AV_RC_ID "avrcp"

#define BT_PROFILE_AV_RC_CTRL_ID "avrcp_ctrl"

#define BT_PROFILE_HEARING_AID_ID "hearing_aid"

/** Bluetooth test interface IDs */

#define BT_TEST_INTERFACE_MCAP_ID "mcap_test"

/*

 * Copyright 2018 The Android Open Source Project

 *

 * 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.

 */

#ifndef ANDROID_INCLUDE_BT_HEARING_AID_H

#define ANDROID_INCLUDE_BT_HEARING_AID_H

#include <hardware/bluetooth.h>

namespace bluetooth {

namespace hearing_aid {

enum class ConnectionState {

  DISCONNECTED = 0,

  CONNECTING,

  CONNECTED,

  DISCONNECTING

};

class HearingAidCallbacks {

 public:

  virtual ~HearingAidCallbacks() = default;

  /** Callback for profile connection state change */

  virtual void OnConnectionState(ConnectionState state,

                                 const RawAddress& address) = 0;

  /** Callback for device being available. Is executed when devices are loaded

   * from storage on stack bringup, and when new device is connected to profile.

   * Main purpose of this callback is to keep its users informed of device

   * capabilities and hiSyncId.

   */

  virtual void OnDeviceAvailable(uint8_t capabilities, uint64_t hiSyncId,

                                 const RawAddress& address) = 0;

};

class HearingAidInterface {

 public:

  virtual ~HearingAidInterface() = default;

  /** Register the Hearing Aid callbacks */

  virtual void Init(HearingAidCallbacks* callbacks) = 0;

  /** Connect to Hearing Aid */

  virtual void Connect(const RawAddress& address) = 0;

  /** Disconnect from Hearing Aid */

  virtual void Disconnect(const RawAddress& address) = 0;

  /** Set the volume */

  virtual void SetVolume(int8_t volume) = 0;

  /** Closes the interface. */

  virtual void Cleanup(void) = 0;

};

}  // namespace hearing_aid

}  // namespace bluetooth

#endif /* ANDROID_INCLUDE_BT_HEARING_AID_H */