From e89317968783addc9b32ed7c9af3b16ca82ecf9b Mon Sep 17 00:00:00 2001
From: Jakub Pawlowski <jpawlowski@google.com>
Date: Tue, 21 Nov 2017 16:35:49 -0800
Subject: [PATCH] Hearing Aid BTIF interface

This is first version of Hearing Aid interface.

Test: compilation
Bug: 69623109
Change-Id: I157dc8d1481c1f034c15aac7dd33a5103cf5ea14
---
 include/hardware/bluetooth.h      |  1 +
 include/hardware/bt_hearing_aid.h | 72 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)
 create mode 100644 include/hardware/bt_hearing_aid.h

diff --git a/include/hardware/bluetooth.h b/include/hardware/bluetooth.h
index dd7b8e119..e48e560b9 100644
--- a/include/hardware/bluetooth.h
+++ b/include/hardware/bluetooth.h
@@ -48,6 +48,7 @@
 #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"
diff --git a/include/hardware/bt_hearing_aid.h b/include/hardware/bt_hearing_aid.h
new file mode 100644
index 000000000..3b53d3711
--- /dev/null
+++ b/include/hardware/bt_hearing_aid.h
@@ -0,0 +1,72 @@
+/*
+ * 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 */
-- 
2.11.0