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      1 /*
      2  * Copyright (C) 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 package com.android.server.telecom.bluetooth;
     18 
     19 import android.bluetooth.BluetoothDevice;
     20 import android.bluetooth.BluetoothHeadset;
     21 import android.content.BroadcastReceiver;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.content.IntentFilter;
     25 import android.telecom.Log;
     26 import android.telecom.Logging.Session;
     27 
     28 import com.android.internal.os.SomeArgs;
     29 
     30 import static com.android.server.telecom.bluetooth.BluetoothRouteManager.HFP_IS_ON;
     31 import static com.android.server.telecom.bluetooth.BluetoothRouteManager.HFP_LOST;
     32 
     33 
     34 public class BluetoothStateReceiver extends BroadcastReceiver {
     35     private static final String LOG_TAG = BluetoothStateReceiver.class.getSimpleName();
     36     public static final IntentFilter INTENT_FILTER;
     37     static {
     38         INTENT_FILTER = new IntentFilter();
     39         INTENT_FILTER.addAction(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED);
     40         INTENT_FILTER.addAction(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED);
     41         INTENT_FILTER.addAction(BluetoothHeadset.ACTION_ACTIVE_DEVICE_CHANGED);
     42     }
     43 
     44     // If not in a call, BSR won't listen to the Bluetooth stack's HFP on/off messages, since
     45     // other apps could be turning it on and off. We don't want to interfere.
     46     private boolean mIsInCall = false;
     47     private final BluetoothRouteManager mBluetoothRouteManager;
     48     private final BluetoothDeviceManager mBluetoothDeviceManager;
     49 
     50     public void onReceive(Context context, Intent intent) {
     51         Log.startSession("BSR.oR");
     52         try {
     53             String action = intent.getAction();
     54             switch (action) {
     55                 case BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED:
     56                     handleAudioStateChanged(intent);
     57                     break;
     58                 case BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED:
     59                     handleConnectionStateChanged(intent);
     60                     break;
     61                 case BluetoothHeadset.ACTION_ACTIVE_DEVICE_CHANGED:
     62                     handleActiveDeviceChanged(intent);
     63                     break;
     64             }
     65         } finally {
     66             Log.endSession();
     67         }
     68     }
     69 
     70     private void handleAudioStateChanged(Intent intent) {
     71         if (!mIsInCall) {
     72             Log.i(LOG_TAG, "Ignoring BT audio state change since we're not in a call");
     73             return;
     74         }
     75         int bluetoothHeadsetAudioState =
     76                 intent.getIntExtra(BluetoothHeadset.EXTRA_STATE,
     77                         BluetoothHeadset.STATE_AUDIO_DISCONNECTED);
     78         BluetoothDevice device =
     79                 intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
     80         if (device == null) {
     81             Log.w(LOG_TAG, "Got null device from broadcast. " +
     82                     "Ignoring.");
     83             return;
     84         }
     85 
     86         Log.i(LOG_TAG, "Device %s transitioned to audio state %d",
     87                 device.getAddress(), bluetoothHeadsetAudioState);
     88         Session session = Log.createSubsession();
     89         SomeArgs args = SomeArgs.obtain();
     90         args.arg1 = session;
     91         args.arg2 = device.getAddress();
     92         switch (bluetoothHeadsetAudioState) {
     93             case BluetoothHeadset.STATE_AUDIO_CONNECTED:
     94                 mBluetoothRouteManager.sendMessage(HFP_IS_ON, args);
     95                 break;
     96             case BluetoothHeadset.STATE_AUDIO_DISCONNECTED:
     97                 mBluetoothRouteManager.sendMessage(HFP_LOST, args);
     98                 break;
     99         }
    100     }
    101 
    102     private void handleConnectionStateChanged(Intent intent) {
    103         int bluetoothHeadsetState = intent.getIntExtra(BluetoothHeadset.EXTRA_STATE,
    104                 BluetoothHeadset.STATE_DISCONNECTED);
    105         BluetoothDevice device =
    106                 intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    107 
    108         if (device == null) {
    109             Log.w(LOG_TAG, "Got null device from broadcast. " +
    110                     "Ignoring.");
    111             return;
    112         }
    113 
    114         Log.i(LOG_TAG, "Device %s changed state to %d",
    115                 device.getAddress(), bluetoothHeadsetState);
    116 
    117         if (bluetoothHeadsetState == BluetoothHeadset.STATE_CONNECTED) {
    118             mBluetoothDeviceManager.onDeviceConnected(device);
    119         } else if (bluetoothHeadsetState == BluetoothHeadset.STATE_DISCONNECTED
    120                 || bluetoothHeadsetState == BluetoothHeadset.STATE_DISCONNECTING) {
    121             mBluetoothDeviceManager.onDeviceDisconnected(device);
    122         }
    123     }
    124 
    125     private void handleActiveDeviceChanged(Intent intent) {
    126         BluetoothDevice device =
    127                 intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    128         Log.i(LOG_TAG, "Device %s is now the preferred HFP device", device);
    129         mBluetoothRouteManager.onActiveDeviceChanged(device);
    130     }
    131 
    132     public BluetoothStateReceiver(BluetoothDeviceManager deviceManager,
    133             BluetoothRouteManager routeManager) {
    134         mBluetoothDeviceManager = deviceManager;
    135         mBluetoothRouteManager = routeManager;
    136     }
    137 
    138     public void setIsInCall(boolean isInCall) {
    139         mIsInCall = isInCall;
    140     }
    141 }
    142