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/*
* Copyright (C) 2013 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.deskclock.alarms;
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnErrorListener;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.os.Vibrator;
import com.android.deskclock.Log;
import com.android.deskclock.MultiPlayer;
import com.android.deskclock.R;
import com.android.deskclock.provider.AlarmInstance;
import java.io.IOException;
/**
* Manages playing ringtone and vibrating the device.
*/
public class AlarmKlaxon {
/* package */ static final long[] sVibratePattern = new long[] { 500, 500 };
// Volume suggested by media team for in-call alarms.
private static final float IN_CALL_VOLUME = 0.125f;
// 5sec * 7 volume levels = 30sec till max volume
private static final long INCREASING_VOLUME_DELAY = 5000;
private static final int INCREASING_VOLUME_START = 1;
private static final int INCREASING_VOLUME_DELTA = 1;
private static boolean sStarted = false;
private static AudioManager sAudioManager = null;
private static MultiPlayer sMediaPlayer = null;
private static int sCurrentVolume = INCREASING_VOLUME_START;
private static int sAlarmVolumeSetting;
// Internal messages
private static final int INCREASING_VOLUME = 1001;
private static Handler sHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case INCREASING_VOLUME:
if (sStarted && sMediaPlayer != null && sMediaPlayer.isPlaying()) {
sCurrentVolume += INCREASING_VOLUME_DELTA;
if (Log.LOGV) {
Log.v("Increasing alarm volume to " + sCurrentVolume);
}
sAudioManager.setStreamVolume(AudioManager.STREAM_ALARM, sCurrentVolume, 0);
if (sCurrentVolume < sAlarmVolumeSetting) {
sHandler.sendEmptyMessageDelayed(INCREASING_VOLUME,
INCREASING_VOLUME_DELAY);
}
}
break;
}
}
};
public static void stop(Context context) {
Log.v("AlarmKlaxon.stop()");
if (sStarted) {
sStarted = false;
sHandler.removeMessages(INCREASING_VOLUME);
// Stop audio playing
if (sMediaPlayer != null) {
sMediaPlayer.stop();
sMediaPlayer.release();
sMediaPlayer = null;
// reset to default from before
sAudioManager.setStreamVolume(AudioManager.STREAM_ALARM, sAlarmVolumeSetting, 0);
sAudioManager.abandonAudioFocus(null);
sAudioManager = null;
}
((Vibrator)context.getSystemService(Context.VIBRATOR_SERVICE)).cancel();
}
}
public static void start(final Context context, AlarmInstance instance,
boolean inTelephoneCall) {
Log.v("AlarmKlaxon.start()");
// Make sure we are stop before starting
stop(context);
if (!AlarmInstance.NO_RINGTONE_URI.equals(instance.mRingtone)) {
Uri alarmNoise = instance.mRingtone;
// Fall back on the default alarm if the database does not have an
// alarm stored.
if (alarmNoise == null) {
alarmNoise = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
if (Log.LOGV) {
Log.v("Using default alarm: " + alarmNoise.toString());
}
}
final Context appContext = context.getApplicationContext();
sAudioManager = (AudioManager) appContext.getSystemService(Context.AUDIO_SERVICE);
// save current value
sAlarmVolumeSetting = sAudioManager.getStreamVolume(AudioManager.STREAM_ALARM);
if (instance.mIncreasingVolume) {
sCurrentVolume = INCREASING_VOLUME_START;
sAudioManager.setStreamVolume(AudioManager.STREAM_ALARM, sCurrentVolume, 0);
}
// TODO: Reuse mMediaPlayer instead of creating a new one and/or use RingtoneManager.
sMediaPlayer = new MultiPlayer(context);
sMediaPlayer.setOnErrorListener(new OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
Log.e("Error occurred while playing audio. Stopping AlarmKlaxon.");
AlarmKlaxon.stop(context);
return true;
}
});
try {
// Check if we are in a call. If we are, use the in-call alarm
// resource at a low volume to not disrupt the call.
if (inTelephoneCall) {
Log.v("Using the in-call alarm");
sMediaPlayer.setVolume(IN_CALL_VOLUME, IN_CALL_VOLUME);
setDataSourceFromResource(context, sMediaPlayer, R.raw.in_call_alarm);
} else {
sMediaPlayer.setDataSource(context, alarmNoise);
}
startAlarm(context, sMediaPlayer, instance);
} catch (Exception ex) {
Log.v("Using the fallback ringtone");
// The alarmNoise may be on the sd card which could be busy right
// now. Use the fallback ringtone.
try {
// Must reset the media player to clear the error state.
sMediaPlayer.reset();
setDataSourceFromResource(context, sMediaPlayer, R.raw.fallbackring);
startAlarm(context, sMediaPlayer, instance);
} catch (Exception ex2) {
// At this point we just don't play anything.
Log.e("Failed to play fallback ringtone", ex2);
}
}
}
if (instance.mVibrate && !inTelephoneCall) {
Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(sVibratePattern, 0);
}
sStarted = true;
}
// Do the common stuff when starting the alarm.
private static void startAlarm(Context context, MultiPlayer player,
AlarmInstance instance) throws IOException {
// do not play alarms if stream volume is 0 (typically because ringer mode is silent).
if (sAudioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {
player.setAudioStreamType(AudioManager.STREAM_ALARM);
player.setLooping(true);
player.prepare();
sAudioManager.requestAudioFocus(null,
AudioManager.STREAM_ALARM, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
player.start();
if (instance.mIncreasingVolume && sCurrentVolume < sAlarmVolumeSetting) {
sHandler.sendEmptyMessageDelayed(INCREASING_VOLUME, INCREASING_VOLUME_DELAY);
}
}
}
private static void setDataSourceFromResource(Context context, MultiPlayer player, int res)
throws IOException {
AssetFileDescriptor afd = context.getResources().openRawResourceFd(res);
if (afd != null) {
player.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
afd.close();
}
}
}
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