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      1 /*
      2  * Copyright (C) 2013 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.deskclock.alarms;
     18 
     19 import android.content.Context;
     20 import android.content.res.AssetFileDescriptor;
     21 import android.media.AudioAttributes;
     22 import android.media.AudioManager;
     23 import android.media.MediaPlayer;
     24 import android.media.MediaPlayer.OnErrorListener;
     25 import android.media.RingtoneManager;
     26 import android.net.Uri;
     27 import android.os.Vibrator;
     28 
     29 import com.android.deskclock.LogUtils;
     30 import com.android.deskclock.R;
     31 import com.android.deskclock.provider.AlarmInstance;
     32 
     33 import java.io.IOException;
     34 
     35 /**
     36  * Manages playing ringtone and vibrating the device.
     37  */
     38 public class AlarmKlaxon {
     39     private static final long[] sVibratePattern = new long[] { 500, 500 };
     40 
     41     // Volume suggested by media team for in-call alarms.
     42     private static final float IN_CALL_VOLUME = 0.125f;
     43 
     44     private static final AudioAttributes VIBRATION_ATTRIBUTES = new AudioAttributes.Builder()
     45             .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
     46             .setUsage(AudioAttributes.USAGE_ALARM)
     47             .build();
     48 
     49     private static boolean sStarted = false;
     50     private static MediaPlayer sMediaPlayer = null;
     51 
     52     public static void stop(Context context) {
     53         LogUtils.v("AlarmKlaxon.stop()");
     54 
     55         if (sStarted) {
     56             sStarted = false;
     57             // Stop audio playing
     58             if (sMediaPlayer != null) {
     59                 sMediaPlayer.stop();
     60                 AudioManager audioManager = (AudioManager)
     61                         context.getSystemService(Context.AUDIO_SERVICE);
     62                 audioManager.abandonAudioFocus(null);
     63                 sMediaPlayer.release();
     64                 sMediaPlayer = null;
     65             }
     66 
     67             ((Vibrator)context.getSystemService(Context.VIBRATOR_SERVICE)).cancel();
     68         }
     69     }
     70 
     71     public static void start(final Context context, AlarmInstance instance,
     72             boolean inTelephoneCall) {
     73         LogUtils.v("AlarmKlaxon.start()");
     74         // Make sure we are stop before starting
     75         stop(context);
     76 
     77         if (!AlarmInstance.NO_RINGTONE_URI.equals(instance.mRingtone)) {
     78             Uri alarmNoise = instance.mRingtone;
     79             // Fall back on the default alarm if the database does not have an
     80             // alarm stored.
     81             if (alarmNoise == null) {
     82                 alarmNoise = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
     83                 LogUtils.v("Using default alarm: " + alarmNoise.toString());
     84             }
     85 
     86             // TODO: Reuse mMediaPlayer instead of creating a new one and/or use RingtoneManager.
     87             sMediaPlayer = new MediaPlayer();
     88             sMediaPlayer.setOnErrorListener(new OnErrorListener() {
     89                 @Override
     90                 public boolean onError(MediaPlayer mp, int what, int extra) {
     91                     LogUtils.e("Error occurred while playing audio. Stopping AlarmKlaxon.");
     92                     AlarmKlaxon.stop(context);
     93                     return true;
     94                 }
     95             });
     96 
     97             try {
     98                 // Check if we are in a call. If we are, use the in-call alarm
     99                 // resource at a low volume to not disrupt the call.
    100                 if (inTelephoneCall) {
    101                     LogUtils.v("Using the in-call alarm");
    102                     sMediaPlayer.setVolume(IN_CALL_VOLUME, IN_CALL_VOLUME);
    103                     setDataSourceFromResource(context, sMediaPlayer, R.raw.in_call_alarm);
    104                 } else {
    105                     sMediaPlayer.setDataSource(context, alarmNoise);
    106                 }
    107                 startAlarm(context, sMediaPlayer);
    108             } catch (Exception ex) {
    109                 LogUtils.v("Using the fallback ringtone");
    110                 // The alarmNoise may be on the sd card which could be busy right
    111                 // now. Use the fallback ringtone.
    112                 try {
    113                     // Must reset the media player to clear the error state.
    114                     sMediaPlayer.reset();
    115                     setDataSourceFromResource(context, sMediaPlayer, R.raw.fallbackring);
    116                     startAlarm(context, sMediaPlayer);
    117                 } catch (Exception ex2) {
    118                     // At this point we just don't play anything.
    119                     LogUtils.e("Failed to play fallback ringtone", ex2);
    120                 }
    121             }
    122         }
    123 
    124         if (instance.mVibrate) {
    125             Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
    126             vibrator.vibrate(sVibratePattern, 0, VIBRATION_ATTRIBUTES);
    127         }
    128 
    129         sStarted = true;
    130     }
    131 
    132     // Do the common stuff when starting the alarm.
    133     private static void startAlarm(Context context, MediaPlayer player) throws IOException {
    134         AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    135         // do not play alarms if stream volume is 0 (typically because ringer mode is silent).
    136         if (audioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {
    137             player.setAudioStreamType(AudioManager.STREAM_ALARM);
    138             player.setLooping(true);
    139             player.prepare();
    140             audioManager.requestAudioFocus(null,
    141                     AudioManager.STREAM_ALARM, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
    142             player.start();
    143         }
    144     }
    145 
    146     private static void setDataSourceFromResource(Context context, MediaPlayer player, int res)
    147             throws IOException {
    148         AssetFileDescriptor afd = context.getResources().openRawResourceFd(res);
    149         if (afd != null) {
    150             player.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
    151             afd.close();
    152         }
    153     }
    154 }
    155