commit 9ac932179c704822c7ae5c7accb02119b578254e
author Nick Pelly Wed Apr 08 15:09:15 2009 -0700
committer The Android Open Source Project <initial-contribution@android.com> Wed Apr 08 15:09:15 2009 -0700
tree 4360e7ccadf2309d0b4a67a9e28fa1b4681dbcc7
parent 939151f1eb3d2522ed952d14a9bb79235a5d7126

AI 145201: Hold wakelock while delaying for audio route switch after headset unplug.
  Fixes bug where we go to sleep before switching audio, and we lose audio until the apps CPU wakes up again.
  BUG=1774615

Automated import of CL 145201

services/java/com/android/server/HeadsetObserver.java

diff --git a/services/java/com/android/server/HeadsetObserver.java b/services/java/com/android/server/HeadsetObserver.java
index c9066be..3fc1e0e 100644
--- a/services/java/com/android/server/HeadsetObserver.java
+++ b/services/java/com/android/server/HeadsetObserver.java
@@ -21,6 +21,8 @@
 import android.content.Intent;
 import android.os.Handler;
 import android.os.Message;
+import android.os.PowerManager;
+import android.os.PowerManager.WakeLock;
 import android.os.UEventObserver;
 import android.util.Log;
 import android.media.AudioManager;
@@ -38,15 +40,19 @@
     private static final String HEADSET_STATE_PATH = "/sys/class/switch/h2w/state";
     private static final String HEADSET_NAME_PATH = "/sys/class/switch/h2w/name";
 
-    private Context mContext;
-
     private int mHeadsetState;
     private String mHeadsetName;
     private boolean mAudioRouteNeedsUpdate;
     private AudioManager mAudioManager;
 
+    private final Context mContext;
+    private final WakeLock mWakeLock;  // held while there is a pending route change
+
     public HeadsetObserver(Context context) {
         mContext = context;
+        PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
+        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "HeadsetObserver");
+        mWakeLock.setReferenceCounted(false);
 
         startObserving(HEADSET_UEVENT_MATCH);
 
@@ -103,6 +109,7 @@
                 // immediate, so delay the route change by 1000ms.
                 // This could be improved once the audio sub-system provides an
                 // interface to clear the audio pipeline.
+                mWakeLock.acquire();
                 mHandler.sendEmptyMessageDelayed(0, 1000);
             } else {
                 updateAudioRoute();
@@ -138,7 +145,8 @@
         @Override
         public void handleMessage(Message msg) {
             updateAudioRoute();
+            mWakeLock.release();
         }
-    };        
+    };
 
 }