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Listen to and follow external Android volume changes. (Based on FS#11914 by Maurus Cuelenaere)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29586 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Björn Stenberg 2011-03-14 12:25:48 +00:00
parent 606bed035e
commit e50cc0e3d7
8 changed files with 95 additions and 3 deletions
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52
android/src/org/rockbox/RockboxPCM.java
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@ -23,8 +23,10 @@ package org.rockbox;
import java.util.Arrays;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
@ -52,8 +54,10 @@ public class RockboxPCM extends AudioTrack
private AudioManager audiomanager;
private int maxstreamvolume;
private int setstreamvolume = -1;
private float minpcmvolume;
private float pcmrange;
private RockboxService rbservice;
private void LOG(CharSequence text)
{
@ -72,15 +76,55 @@ public class RockboxPCM extends AudioTrack
l = new PCMListener(buf_len);
/* find cleaner way to get context? */
final RockboxService rb = RockboxService.get_instance();
rbservice = RockboxService.get_instance();
audiomanager =
(AudioManager) rb.getSystemService(Context.AUDIO_SERVICE);
(AudioManager) rbservice.getSystemService(Context.AUDIO_SERVICE);
maxstreamvolume = audiomanager.getStreamMaxVolume(streamtype);
minpcmvolume = getMinVolume();
pcmrange = getMaxVolume() - minpcmvolume;
setupVolumeHandler();
}
private native void postVolumeChangedEvent(int volume);
private void setupVolumeHandler()
{
BroadcastReceiver broadcastReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
int streamType = intent.getIntExtra(
"android.media.EXTRA_VOLUME_STREAM_TYPE", -1);
int volume = intent.getIntExtra(
"android.media.EXTRA_VOLUME_STREAM_VALUE", -1);
if (streamType == RockboxPCM.streamtype &&
volume != -1 &&
volume != setstreamvolume &&
rbservice.isRockboxRunning())
{
int rbvolume = ((maxstreamvolume - volume) * -99) /
maxstreamvolume;
postVolumeChangedEvent(rbvolume);
}
}
};
/* at startup, change the internal rockbox volume to what the global
android music stream volume is */
int volume = audiomanager.getStreamVolume(streamtype);
int rbvolume = ((maxstreamvolume - volume) * -99) / maxstreamvolume;
postVolumeChangedEvent(rbvolume);
/* We're relying on internal API's here,
this can break in the future! */
rbservice.registerReceiver(
broadcastReceiver,
new IntentFilter("android.media.VOLUME_CHANGED_ACTION"));
}
private int bytes2frames(int bytes)
{
/* 1 sample is 2 bytes, 2 samples are 1 frame */
@ -164,8 +208,10 @@ public class RockboxPCM extends AudioTrack
}
int oldstreamvolume = audiomanager.getStreamVolume(streamtype);
if (streamvolume != oldstreamvolume)
if (streamvolume != oldstreamvolume) {
setstreamvolume = streamvolume;
audiomanager.setStreamVolume(streamtype, streamvolume, 0);
}
}
public native void pcmSamplesToByteArray(byte[] dest);