Add new app ops for various interesting audio service things.

Media buttons: note when an application tries to take ownership
of the media buttons.
Audio focus: note when an application tries to take audio focus.
Volume levels: note changes to the volume level of the various
streams.

Maybe we should also have some ops for muting streams, soloing
streams, etc?

Change-Id: I79a5d477b0bad4ff61486cdb73ffb1196a674964

4 files changed, 101 insertions, 44 deletions

diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index 8295c5f..32e5446 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -551,9 +551,10 @@ public class AudioManager {
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.adjustMasterVolume(direction, flags);
+                service.adjustMasterVolume(direction, flags, mContext.getBasePackageName());
             } else {
-                service.adjustStreamVolume(streamType, direction, flags);
+                service.adjustStreamVolume(streamType, direction, flags,
+                        mContext.getBasePackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustStreamVolume", e);
@@ -581,9 +582,9 @@ public class AudioManager {
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.adjustMasterVolume(direction, flags);
+                service.adjustMasterVolume(direction, flags, mContext.getBasePackageName());
             } else {
-                service.adjustVolume(direction, flags);
+                service.adjustVolume(direction, flags, mContext.getBasePackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustVolume", e);
@@ -611,9 +612,10 @@ public class AudioManager {
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.adjustMasterVolume(direction, flags);
+                service.adjustMasterVolume(direction, flags, mContext.getBasePackageName());
             } else {
-                service.adjustSuggestedStreamVolume(direction, suggestedStreamType, flags);
+                service.adjustSuggestedStreamVolume(direction, suggestedStreamType, flags,
+                        mContext.getBasePackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustSuggestedStreamVolume", e);
@@ -632,7 +634,7 @@ public class AudioManager {
     public void adjustMasterVolume(int steps, int flags) {
         IAudioService service = getService();
         try {
-            service.adjustMasterVolume(steps, flags);
+            service.adjustMasterVolume(steps, flags, mContext.getBasePackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustMasterVolume", e);
         }
@@ -784,9 +786,9 @@ public class AudioManager {
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.setMasterVolume(index, flags);
+                service.setMasterVolume(index, flags, mContext.getBasePackageName());
             } else {
-                service.setStreamVolume(streamType, index, flags);
+                service.setStreamVolume(streamType, index, flags, mContext.getBasePackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in setStreamVolume", e);
@@ -843,16 +845,16 @@ public class AudioManager {
      * Sets the volume index for master volume.
      *
      * @param index The volume index to set. See
-     *            {@link #getMasterMaxVolume(int)} for the largest valid value.
+     *            {@link #getMasterMaxVolume()} for the largest valid value.
      * @param flags One or more flags.
-     * @see #getMasterMaxVolume(int)
-     * @see #getMasterVolume(int)
+     * @see #getMasterMaxVolume()
+     * @see #getMasterVolume()
      * @hide
      */
     public void setMasterVolume(int index, int flags) {
         IAudioService service = getService();
         try {
-            service.setMasterVolume(index, flags);
+            service.setMasterVolume(index, flags, mContext.getBasePackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in setMasterVolume", e);
         }
@@ -1563,7 +1565,8 @@ public class AudioManager {
         }
         IAudioService service = getService();
         try {
-            service.adjustLocalOrRemoteStreamVolume(streamType, direction);
+            service.adjustLocalOrRemoteStreamVolume(streamType, direction,
+                    mContext.getBasePackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustLocalOrRemoteStreamVolume", e);
         }
@@ -1582,7 +1585,7 @@ public class AudioManager {
      */
     /**
      * @hide
-     * @deprecated Use {@link #setPrameters(String)} instead
+     * @deprecated Use {@link #setParameters(String)} instead
      */
     @Deprecated public void setParameter(String key, String value) {
         setParameters(key+"="+value);
@@ -1964,7 +1967,7 @@ public class AudioManager {
         try {
             status = service.requestAudioFocus(streamType, durationHint, mICallBack,
                     mAudioFocusDispatcher, getIdForAudioFocusListener(l),
-                    mContext.getPackageName() /* package name */);
+                    mContext.getBasePackageName() /* package name */);
         } catch (RemoteException e) {
             Log.e(TAG, "Can't call requestAudioFocus() on AudioService due to "+e);
         }
@@ -1986,7 +1989,7 @@ public class AudioManager {
         try {
             service.requestAudioFocus(streamType, durationHint, mICallBack, null,
                     AudioService.IN_VOICE_COMM_FOCUS_ID,
-                    "system" /* dump-friendly package name */);
+                    mContext.getBasePackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Can't call requestAudioFocusForCall() on AudioService due to "+e);
         }
diff --git a/media/java/android/media/AudioService.java b/media/java/android/media/AudioService.java
index e237194..33ba229 100644
--- a/media/java/android/media/AudioService.java
+++ b/media/java/android/media/AudioService.java
@@ -23,6 +23,7 @@ import static android.media.AudioManager.RINGER_MODE_VIBRATE;
 
 import android.app.Activity;
 import android.app.ActivityManagerNative;
+import android.app.AppOpsManager;
 import android.app.KeyguardManager;
 import android.app.PendingIntent;
 import android.app.PendingIntent.CanceledException;
@@ -115,9 +116,10 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
     /** How long to delay before persisting a change in volume/ringer mode. */
     private static final int PERSIST_DELAY = 500;
 
-    private Context mContext;
-    private ContentResolver mContentResolver;
-    private boolean mVoiceCapable;
+    private final Context mContext;
+    private final ContentResolver mContentResolver;
+    private final AppOpsManager mAppOps;
+    private final boolean mVoiceCapable;
 
     /** The UI */
     private VolumePanel mVolumePanel;
@@ -255,6 +257,23 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
     };
     private int[] mStreamVolumeAlias;
 
+    /**
+     * Map AudioSystem.STREAM_* constants to app ops.  This should be used
+     * after mapping through mStreamVolumeAlias.
+     */
+    private static final int[] STEAM_VOLUME_OPS = new int[] {
+        AppOpsManager.OP_AUDIO_VOICE_VOLUME,            // STREAM_VOICE_CALL
+        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_SYSTEM
+        AppOpsManager.OP_AUDIO_RING_VOLUME,             // STREAM_RING
+        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_MUSIC
+        AppOpsManager.OP_AUDIO_ALARM_VOLUME,            // STREAM_ALARM
+        AppOpsManager.OP_AUDIO_NOTIFICATION_VOLUME,     // STREAM_NOTIFICATION
+        AppOpsManager.OP_AUDIO_BLUETOOTH_VOLUME,        // STREAM_BLUETOOTH_SCO
+        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_SYSTEM_ENFORCED
+        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_DTMF
+        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_TTS
+    };
+
     private final boolean mUseFixedVolume;
 
     // stream names used by dumpStreamStates()
@@ -452,6 +471,7 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
     public AudioService(Context context) {
         mContext = context;
         mContentResolver = context.getContentResolver();
+        mAppOps = (AppOpsManager)context.getSystemService(Context.APP_OPS_SERVICE);
         mVoiceCapable = mContext.getResources().getBoolean(
                 com.android.internal.R.bool.config_voice_capable);
 
@@ -775,23 +795,26 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
     ///////////////////////////////////////////////////////////////////////////
 
     /** @see AudioManager#adjustVolume(int, int) */
-    public void adjustVolume(int direction, int flags) {
-        adjustSuggestedStreamVolume(direction, AudioManager.USE_DEFAULT_STREAM_TYPE, flags);
+    public void adjustVolume(int direction, int flags, String callingPackage) {
+        adjustSuggestedStreamVolume(direction, AudioManager.USE_DEFAULT_STREAM_TYPE, flags,
+                callingPackage);
     }
 
     /** @see AudioManager#adjustLocalOrRemoteStreamVolume(int, int) with current assumption
      *  on streamType: fixed to STREAM_MUSIC */
-    public void adjustLocalOrRemoteStreamVolume(int streamType, int direction) {
+    public void adjustLocalOrRemoteStreamVolume(int streamType, int direction,
+            String callingPackage) {
         if (DEBUG_VOL) Log.d(TAG, "adjustLocalOrRemoteStreamVolume(dir="+direction+")");
         if (checkUpdateRemoteStateIfActive(AudioSystem.STREAM_MUSIC)) {
             adjustRemoteVolume(AudioSystem.STREAM_MUSIC, direction, 0);
         } else if (AudioSystem.isStreamActive(AudioSystem.STREAM_MUSIC, 0)) {
-            adjustStreamVolume(AudioSystem.STREAM_MUSIC, direction, 0);
+            adjustStreamVolume(AudioSystem.STREAM_MUSIC, direction, 0, callingPackage);
         }
     }
 
     /** @see AudioManager#adjustVolume(int, int) */
-    public void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags) {
+    public void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags,
+            String callingPackage) {
         if (DEBUG_VOL) Log.d(TAG, "adjustSuggestedStreamVolume() stream="+suggestedStreamType);
         int streamType;
         if (mVolumeControlStream != -1) {
@@ -814,12 +837,13 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
             //if (DEBUG_VOL) Log.i(TAG, "Need to adjust remote volume: calling adjustRemoteVolume()");
             adjustRemoteVolume(AudioSystem.STREAM_MUSIC, direction, flags);
         } else {
-            adjustStreamVolume(streamType, direction, flags);
+            adjustStreamVolume(streamType, direction, flags, callingPackage);
         }
     }
 
     /** @see AudioManager#adjustStreamVolume(int, int, int) */
-    public void adjustStreamVolume(int streamType, int direction, int flags) {
+    public void adjustStreamVolume(int streamType, int direction, int flags,
+            String callingPackage) {
         if (mUseFixedVolume) {
             return;
         }
@@ -840,6 +864,11 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
         boolean adjustVolume = true;
         int step;
 
+        if (mAppOps.noteOp(STEAM_VOLUME_OPS[streamTypeAlias], Binder.getCallingUid(),
+                callingPackage) != AppOpsManager.MODE_ALLOWED) {
+            return;
+        }
+
         // reset any pending volume command
         synchronized (mSafeMediaVolumeState) {
             mPendingVolumeCommand = null;
@@ -905,7 +934,7 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
     }
 
     /** @see AudioManager#adjustMasterVolume(int, int) */
-    public void adjustMasterVolume(int steps, int flags) {
+    public void adjustMasterVolume(int steps, int flags, String callingPackage) {
         if (mUseFixedVolume) {
             return;
         }
@@ -920,7 +949,7 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
         }
 
         //Log.d(TAG, "adjustMasterVolume volume: " + volume + " steps: " + steps);
-        setMasterVolume(volume, flags);
+        setMasterVolume(volume, flags, callingPackage);
     }
 
     // StreamVolumeCommand contains the information needed to defer the process of
@@ -956,27 +985,33 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
     }
 
     /** @see AudioManager#setStreamVolume(int, int, int) */
-    public void setStreamVolume(int streamType, int index, int flags) {
+    public void setStreamVolume(int streamType, int index, int flags, String callingPackage) {
         if (mUseFixedVolume) {
             return;
         }
 
         ensureValidStreamType(streamType);
-        VolumeStreamState streamState = mStreamStates[mStreamVolumeAlias[streamType]];
+        int streamTypeAlias = mStreamVolumeAlias[streamType];
+        VolumeStreamState streamState = mStreamStates[streamTypeAlias];
 
         final int device = getDeviceForStream(streamType);
         int oldIndex;
 
+        if (mAppOps.noteOp(STEAM_VOLUME_OPS[streamTypeAlias], Binder.getCallingUid(),
+                callingPackage) != AppOpsManager.MODE_ALLOWED) {
+            return;
+        }
+
         synchronized (mSafeMediaVolumeState) {
             // reset any pending volume command
             mPendingVolumeCommand = null;
 
             oldIndex = streamState.getIndex(device);
 
-            index = rescaleIndex(index * 10, streamType, mStreamVolumeAlias[streamType]);
+            index = rescaleIndex(index * 10, streamType, streamTypeAlias);
 
             flags &= ~AudioManager.FLAG_FIXED_VOLUME;
-            if ((mStreamVolumeAlias[streamType] == AudioSystem.STREAM_MUSIC) &&
+            if ((streamTypeAlias == AudioSystem.STREAM_MUSIC) &&
                     ((device & mFixedVolumeDevices) != 0)) {
                 flags |= AudioManager.FLAG_FIXED_VOLUME;
 
@@ -991,7 +1026,7 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
                 }
             }
 
-            if (!checkSafeMediaVolume(mStreamVolumeAlias[streamType], index, device)) {
+            if (!checkSafeMediaVolume(streamTypeAlias, index, device)) {
                 mVolumePanel.postDisplaySafeVolumeWarning(flags);
                 mPendingVolumeCommand = new StreamVolumeCommand(
                                                     streamType, index, flags, device);
@@ -1249,11 +1284,16 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
         return getLastAudibleMasterVolume();
     }
 
-    public void setMasterVolume(int volume, int flags) {
+    public void setMasterVolume(int volume, int flags, String callingPackage) {
         if (mUseFixedVolume) {
             return;
         }
 
+        if (mAppOps.noteOp(AppOpsManager.OP_AUDIO_MASTER_VOLUME, Binder.getCallingUid(),
+                callingPackage) != AppOpsManager.MODE_ALLOWED) {
+            return;
+        }
+
         if (volume < 0) {
             volume = 0;
         } else if (volume > MAX_MASTER_VOLUME) {
@@ -4382,6 +4422,11 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
             return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
         }
 
+        if (mAppOps.noteOp(AppOpsManager.OP_TAKE_AUDIO_FOCUS, Binder.getCallingUid(),
+                callingPackageName) != AppOpsManager.MODE_ALLOWED) {
+            return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
+        }
+
         synchronized(mAudioFocusLock) {
             if (!canReassignAudioFocus()) {
                 return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
@@ -5182,6 +5227,10 @@ public class AudioService extends IAudioService.Stub implements OnFinished {
         if (!mRCStack.empty() && mRCStack.peek().mMediaIntent.equals(mediaIntent)) {
             return;
         }
+        if (mAppOps.noteOp(AppOpsManager.OP_TAKE_MEDIA_BUTTONS, Binder.getCallingUid(),
+                mediaIntent.getCreatorPackage()) != AppOpsManager.MODE_ALLOWED) {
+            return;
+        }
         RemoteControlStackEntry rcse = null;
         boolean wasInsideStack = false;
         try {
diff --git a/media/java/android/media/IAudioService.aidl b/media/java/android/media/IAudioService.aidl
index fda8c1b..e60ecc4 100644
--- a/media/java/android/media/IAudioService.aidl
+++ b/media/java/android/media/IAudioService.aidl
@@ -34,21 +34,23 @@ import android.view.KeyEvent;
  */
 interface IAudioService {
     
-    void adjustVolume(int direction, int flags);
+    void adjustVolume(int direction, int flags, String callingPackage);
 
-    oneway void adjustLocalOrRemoteStreamVolume(int streamType, int direction);
+    oneway void adjustLocalOrRemoteStreamVolume(int streamType, int direction,
+            String callingPackage);
 
-    void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags);
+    void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags,
+            String callingPackage);
 
-    void adjustStreamVolume(int streamType, int direction, int flags);
+    void adjustStreamVolume(int streamType, int direction, int flags, String callingPackage);
 
-    void adjustMasterVolume(int direction, int flags);
+    void adjustMasterVolume(int direction, int flags, String callingPackage);
 
-    void setStreamVolume(int streamType, int index, int flags);
+    void setStreamVolume(int streamType, int index, int flags, String callingPackage);
 
     oneway void setRemoteStreamVolume(int index);
 
-    void setMasterVolume(int index, int flags);
+    void setMasterVolume(int index, int flags, String callingPackage);
     
     void setStreamSolo(int streamType, boolean state, IBinder cb);
    	
diff --git a/media/java/android/media/MediaRouter.java b/media/java/android/media/MediaRouter.java
index 61c55a5..1a5b3b9 100644
--- a/media/java/android/media/MediaRouter.java
+++ b/media/java/android/media/MediaRouter.java
@@ -16,6 +16,7 @@
 
 package android.media;
 
+import android.app.ActivityThread;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -1162,7 +1163,8 @@ public class MediaRouter {
         public void requestSetVolume(int volume) {
             if (mPlaybackType == PLAYBACK_TYPE_LOCAL) {
                 try {
-                    sStatic.mAudioService.setStreamVolume(mPlaybackStream, volume, 0);
+                    sStatic.mAudioService.setStreamVolume(mPlaybackStream, volume, 0,
+                            ActivityThread.currentPackageName());
                 } catch (RemoteException e) {
                     Log.e(TAG, "Error setting local stream volume", e);
                 }
@@ -1182,7 +1184,8 @@ public class MediaRouter {
                 try {
                     final int volume =
                             Math.max(0, Math.min(getVolume() + direction, getVolumeMax()));
-                    sStatic.mAudioService.setStreamVolume(mPlaybackStream, volume, 0);
+                    sStatic.mAudioService.setStreamVolume(mPlaybackStream, volume, 0,
+                            ActivityThread.currentPackageName());
                 } catch (RemoteException e) {
                     Log.e(TAG, "Error setting local stream volume", e);
                 }