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      1 /*
      2  * Copyright (C) 2014 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 package com.android.onemedia;
     17 
     18 import android.app.Service;
     19 import android.content.Intent;
     20 import android.graphics.Bitmap;
     21 import android.media.session.MediaSession;
     22 import android.media.session.PlaybackState;
     23 import android.os.Bundle;
     24 import android.os.IBinder;
     25 import android.os.RemoteException;
     26 import android.util.Log;
     27 
     28 import com.android.onemedia.playback.IRequestCallback;
     29 import com.android.onemedia.playback.RequestUtils;
     30 
     31 import java.util.ArrayList;
     32 
     33 public class PlayerService extends Service {
     34     private static final String TAG = "PlayerService";
     35 
     36     private PlayerBinder mBinder;
     37     private PlayerSession mSession;
     38     private NotificationHelper mNotifyHelper;
     39     private Intent mIntent;
     40     private boolean mStarted = false;
     41 
     42     private ArrayList<IPlayerCallback> mCbs = new ArrayList<IPlayerCallback>();
     43 
     44     @Override
     45     public void onCreate() {
     46         Log.d(TAG, "onCreate");
     47         mIntent = onCreateServiceIntent();
     48         if (mSession == null) {
     49             mSession = onCreatePlayerController();
     50             mSession.createSession();
     51             mSession.setListener(mPlayerListener);
     52             mNotifyHelper = new NotificationHelper(this, mSession.mSession);
     53         }
     54     }
     55 
     56     @Override
     57     public IBinder onBind(Intent intent) {
     58         if (mBinder == null) {
     59             mBinder = new PlayerBinder();
     60         }
     61         return mBinder;
     62     }
     63 
     64     @Override
     65     public int onStartCommand(Intent intent, int flags, int startId) {
     66         Log.d(TAG, "onStartCommand");
     67         return START_STICKY;
     68     }
     69 
     70     @Override
     71     public void onDestroy() {
     72         Log.d(TAG, "onDestroy");
     73         mSession.onDestroy();
     74         mSession = null;
     75     }
     76 
     77     public void onPlaybackStarted() {
     78         if (!mStarted) {
     79             Log.d(TAG, "Starting self");
     80             startService(onCreateServiceIntent());
     81             mNotifyHelper.onStart();
     82             mStarted = true;
     83         }
     84     }
     85 
     86     public void onPlaybackEnded() {
     87         if (mStarted) {
     88             Log.d(TAG, "Stopping self");
     89             mNotifyHelper.onStop();
     90             stopSelf();
     91             mStarted = false;
     92         }
     93     }
     94 
     95     protected Intent onCreateServiceIntent() {
     96         return new Intent(this, PlayerService.class).setPackage(getBasePackageName());
     97     }
     98 
     99     protected PlayerSession onCreatePlayerController() {
    100         return new PlayerSession(this);
    101     }
    102 
    103     protected ArrayList<String> getAllowedPackages() {
    104         return null;
    105     }
    106 
    107     private final PlayerSession.Listener mPlayerListener = new PlayerSession.Listener() {
    108         @Override
    109         public void onPlayStateChanged(PlaybackState state) {
    110             switch (state.getState()) {
    111                 case PlaybackState.STATE_PLAYING:
    112                     onPlaybackStarted();
    113                     break;
    114                 case PlaybackState.STATE_STOPPED:
    115                 case PlaybackState.STATE_ERROR:
    116                     onPlaybackEnded();
    117                     break;
    118             }
    119         }
    120     };
    121 
    122     public class PlayerBinder extends IPlayerService.Stub {
    123         @Override
    124         public void sendRequest(String action, Bundle params, IRequestCallback cb) {
    125             if (RequestUtils.ACTION_SET_CONTENT.equals(action)) {
    126                 mSession.setContent(params);
    127             } else if (RequestUtils.ACTION_SET_NEXT_CONTENT.equals(action)) {
    128                 mSession.setNextContent(params);
    129             }
    130         }
    131 
    132         @Override
    133         public void registerCallback(final IPlayerCallback cb) throws RemoteException {
    134             if (!mCbs.contains(cb)) {
    135                 mCbs.add(cb);
    136                 cb.asBinder().linkToDeath(new IBinder.DeathRecipient() {
    137                     @Override
    138                     public void binderDied() {
    139                         mCbs.remove(cb);
    140                     }
    141                 }, 0);
    142             }
    143             try {
    144                 cb.onSessionChanged(getSessionToken());
    145             } catch (RemoteException e) {
    146                 mCbs.remove(cb);
    147                 throw e;
    148             }
    149         }
    150 
    151         @Override
    152         public void unregisterCallback(IPlayerCallback cb) throws RemoteException {
    153             mCbs.remove(cb);
    154         }
    155 
    156         @Override
    157         public MediaSession.Token getSessionToken() throws RemoteException {
    158             if (mSession == null) {
    159                 Log.e(TAG, "Error in PlayerService: mSession=null in getSessionToken()");
    160                 return null;
    161             }
    162             return mSession.getSessionToken();
    163         }
    164 
    165         @Override
    166         public void setIcon(Bitmap icon) {
    167             mSession.setIcon(icon);
    168         }
    169     }
    170 
    171 }
    172