| /* |
| * Copyright (C) 2015 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. |
| */ |
| |
| package com.android.car; |
| |
| import android.car.Car; |
| import android.car.hardware.radio.CarRadioEvent; |
| import android.car.hardware.radio.CarRadioPreset; |
| import android.car.hardware.radio.ICarRadio; |
| import android.car.hardware.radio.ICarRadioEventListener; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.os.IBinder; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import com.android.car.hal.RadioHalService; |
| |
| import java.io.PrintWriter; |
| import java.util.HashMap; |
| |
| public class CarRadioService extends ICarRadio.Stub |
| implements CarServiceBase, RadioHalService.RadioListener { |
| public static boolean DBG = false; |
| public static String TAG = CarLog.TAG_RADIO + ".CarRadioService"; |
| |
| private RadioHalService mRadioHal; |
| private final HashMap<IBinder, ICarRadioEventListener> mListenersMap = |
| new HashMap<IBinder, ICarRadioEventListener>(); |
| private final HashMap<IBinder, RadioDeathRecipient> mDeathRecipientMap = |
| new HashMap<IBinder, RadioDeathRecipient>(); |
| private final Context mContext; |
| |
| public CarRadioService(Context context, RadioHalService radioHal) { |
| mRadioHal = radioHal; |
| mContext = context; |
| } |
| |
| class RadioDeathRecipient implements IBinder.DeathRecipient { |
| private String TAG = CarRadioService.TAG + ".RadioDeathRecipient"; |
| private IBinder mListenerBinder; |
| |
| RadioDeathRecipient(IBinder listenerBinder) { |
| mListenerBinder = listenerBinder; |
| } |
| |
| /** |
| * Client died. Remove the listener from HAL service and unregister if this is the last |
| * client. |
| */ |
| @Override |
| public void binderDied() { |
| if (DBG) { |
| Log.d(TAG, "binderDied " + mListenerBinder); |
| } |
| mListenerBinder.unlinkToDeath(this, 0); |
| CarRadioService.this.unregisterListenerLocked(mListenerBinder); |
| } |
| |
| void release() { |
| mListenerBinder.unlinkToDeath(this, 0); |
| } |
| } |
| |
| @Override |
| public synchronized void init() { |
| } |
| |
| @Override |
| public synchronized void release() { |
| for (IBinder listenerBinder : mListenersMap.keySet()) { |
| RadioDeathRecipient deathRecipient = mDeathRecipientMap.get(listenerBinder); |
| deathRecipient.release(); |
| } |
| mDeathRecipientMap.clear(); |
| mListenersMap.clear(); |
| } |
| |
| @Override |
| public void dump(PrintWriter writer) { |
| } |
| |
| @Override |
| public int getPresetCount() { |
| return mRadioHal.getPresetCount(); |
| } |
| |
| @Override |
| public synchronized void registerListener(ICarRadioEventListener listener) { |
| if (DBG) { |
| Log.d(TAG, "registerListener"); |
| } |
| if (listener == null) { |
| Log.e(TAG, "registerListener: Listener is null."); |
| throw new IllegalStateException("listener cannot be null."); |
| } |
| |
| IBinder listenerBinder = listener.asBinder(); |
| if (mListenersMap.containsKey(listenerBinder)) { |
| // Already registered, nothing to do. |
| return; |
| } |
| |
| RadioDeathRecipient deathRecipient = new RadioDeathRecipient(listenerBinder); |
| try { |
| listenerBinder.linkToDeath(deathRecipient, 0); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Failed to link death for recipient. " + e); |
| throw new IllegalStateException(Car.CAR_NOT_CONNECTED_EXCEPTION_MSG); |
| } |
| mDeathRecipientMap.put(listenerBinder, deathRecipient); |
| |
| if (mListenersMap.isEmpty()) { |
| mRadioHal.registerListener(this); |
| } |
| |
| mListenersMap.put(listenerBinder, listener); |
| } |
| |
| @Override |
| public synchronized void unregisterListener(ICarRadioEventListener listener) { |
| if (DBG) { |
| Log.d(TAG, "unregisterListener"); |
| } |
| |
| if (listener == null) { |
| Log.e(TAG, "unregisterListener: Listener is null."); |
| throw new IllegalArgumentException("Listener is null"); |
| } |
| |
| IBinder listenerBinder = listener.asBinder(); |
| if (!mListenersMap.containsKey(listenerBinder)) { |
| Log.e(TAG, "unregisterListener: Listener was not previously registered."); |
| } |
| unregisterListenerLocked(listenerBinder); |
| } |
| |
| // Removes the listenerBinder from the current state. |
| // The function assumes that the binder will exist both in listeners and death recipients list. |
| private void unregisterListenerLocked(IBinder listenerBinder) { |
| Object status = mListenersMap.remove(listenerBinder); |
| if (status == null) throw new IllegalStateException( |
| "Map must contain the event listener."); |
| |
| // If there is a state muck up, the release() call will throw an exception automagically. |
| mDeathRecipientMap.get(listenerBinder).release(); |
| mDeathRecipientMap.remove(listenerBinder); |
| |
| if (mListenersMap.isEmpty()) { |
| mRadioHal.unregisterListener(); |
| } |
| } |
| |
| @Override |
| public CarRadioPreset getPreset(int index) { |
| if (DBG) { |
| Log.d(TAG, "getPreset " + index); |
| } |
| return mRadioHal.getRadioPreset(index); |
| } |
| |
| @Override |
| public boolean setPreset(CarRadioPreset preset) { |
| checkRadioPremissions(); |
| if (DBG) { |
| Log.d(TAG, "setPreset " + preset); |
| } |
| boolean status = mRadioHal.setRadioPreset(preset); |
| if (status == false) { |
| Log.e(TAG, "setPreset failed!"); |
| } |
| return status; |
| } |
| |
| @Override |
| public synchronized void onEvent(CarRadioEvent event) { |
| for (ICarRadioEventListener l : mListenersMap.values()) { |
| try { |
| l.onEvent(event); |
| } catch (RemoteException ex) { |
| // If we could not send a record, its likely the connection snapped. Let the binder |
| // death handle the situation. |
| Log.e(TAG, "onEvent calling failed: " + ex); |
| } |
| } |
| } |
| |
| private void checkRadioPremissions() { |
| if (getCallingUid() != Process.SYSTEM_UID && |
| mContext.checkCallingOrSelfPermission(Car.PERMISSION_CAR_RADIO) != |
| PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("requires system app or " + |
| Car.PERMISSION_CAR_RADIO); |
| } |
| } |
| } |