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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Thomas Martitz
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
package org.rockbox.Helper;
import org.rockbox.RockboxFramebuffer;
import org.rockbox.RockboxService;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioManager;
import android.view.KeyEvent;
public class MediaButtonReceiver
{
/* A note on the API being used. 2.2 introduces a new and sane API
* for handling multimedia button presses
* http://android-developers.blogspot.com/2010/06/allowing-applications-to-play-nicer.html
*
* the old API is flawed. It doesn't have management for
* concurrent media apps
*
* if multiple media apps are running
* probably all of them want to respond to media keys
*
* it's not clear which app wins, it depends on the
* priority set for the IntentFilter (see below)
*
* so this all might or might not work on < 2.2 */
IMultiMediaReceiver api;
public MediaButtonReceiver(Context c)
{
try {
api = new NewApi(c);
} catch (Throwable t) {
/* Throwable includes Exception and the expected
* NoClassDefFoundError */
api = new OldApi(c);
Logger.i("MediaButtonReceiver: Falling back to compatibility API");
}
}
public void register()
{
api.register();
}
public void unregister()
{
api.unregister();
}
/* helper class for the manifest */
public static class MediaReceiver extends BroadcastReceiver
{
private void startService(Context c, Intent baseIntent)
{
baseIntent.setClass(c, RockboxService.class);
c.startService(baseIntent);
}
@Override
public void onReceive(Context context, Intent intent)
{
if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction()))
{
KeyEvent key = (KeyEvent)intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
if (key.getAction() == KeyEvent.ACTION_UP)
{ /* pass the pressed key to Rockbox, starting it if needed */
RockboxService s = RockboxService.getInstance();
if (s == null || !s.isRockboxRunning())
startService(context, intent);
else if (RockboxFramebuffer.buttonHandler(key.getKeyCode(), false))
abortBroadcast();
}
}
}
}
private interface IMultiMediaReceiver
{
void register();
void unregister();
}
private static class NewApi
implements IMultiMediaReceiver, AudioManager.OnAudioFocusChangeListener
{
private AudioManager audio_manager;
private ComponentName receiver_name;
private boolean running = false;
NewApi(Context c)
{
audio_manager = (AudioManager)c.getSystemService(Context.AUDIO_SERVICE);
receiver_name = new ComponentName(c, MediaReceiver.class);
}
public void register()
{
try {
audio_manager.registerMediaButtonEventReceiver(receiver_name);
audio_manager.requestAudioFocus(this, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
running = true;
} catch (Exception e) {
// Nothing
e.printStackTrace();
}
}
public void unregister()
{
try
{
audio_manager.unregisterMediaButtonEventReceiver(receiver_name);
audio_manager.abandonAudioFocus(this);
running = false;
} catch (Exception e) {
// Nothing
e.printStackTrace();
}
}
public void onAudioFocusChange(int focusChange)
{
Logger.d("Audio focus" + ((focusChange>0)?"gained":"lost")+
": "+ focusChange);
if (running)
{ /* Play nice and stop for the the other app */
if (focusChange == AudioManager.AUDIOFOCUS_LOSS)
RockboxFramebuffer.buttonHandler(KeyEvent.KEYCODE_MEDIA_STOP, false);
}
}
}
private static class OldApi implements IMultiMediaReceiver
{
private static final IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);
private MediaReceiver receiver;
private Context context;
OldApi(Context c)
{
filter.setPriority(1); /* 1 higher than the built-in media player */
receiver = new MediaReceiver();
context = c;
}
public void register()
{
context.registerReceiver(receiver, filter);
}
public void unregister()
{
context.unregisterReceiver(receiver);
}
}
}
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