AudioAttributes: introduce new flags to bypass audio restrictions.

 - New @hidden @SystemApi FLAG_BYPASS_INTERRUPTION_POLICY, request
   to ignore any current audio restrictions, such as zen mode
   content-based notification filtering.
 - Wire up FLAG_BYPASS_INTERRUPTION_POLICY to the existing
   audio restriction checks in the framework.

 - New @hidden @SystemApi FLAG_BYPASS_MUTE, request to play
   audibly, even if the underlying stream is muted.
 - Wiring up to audio framework TBD.

 - Use both of these new flags on the inline volume slider
   controls used in Settings, ensuring playback is heard
   regardless of the current device filter state.

Bug: 19407114
Change-Id: I3d44394931592ccbc1b61ddd9a4d1cc984da17cc

4 files changed, 28 insertions, 1 deletions

diff --git a/media/java/android/media/AudioAttributes.java b/media/java/android/media/AudioAttributes.java
index ca242e4..97919a9 100644
--- a/media/java/android/media/AudioAttributes.java
+++ b/media/java/android/media/AudioAttributes.java
@@ -209,8 +209,23 @@ public final class AudioAttributes implements Parcelable {
     @SystemApi
     public final static int FLAG_HW_HOTWORD = 0x1 << 5;
 
+    /**
+     * @hide
+     * Flag requesting audible playback even under limited interruptions.
+     */
+    @SystemApi
+    public final static int FLAG_BYPASS_INTERRUPTION_POLICY = 0x1 << 6;
+
+    /**
+     * @hide
+     * Flag requesting audible playback even when the underlying stream is muted.
+     */
+    @SystemApi
+    public final static int FLAG_BYPASS_MUTE = 0x1 << 7;
+
     private final static int FLAG_ALL = FLAG_AUDIBILITY_ENFORCED | FLAG_SECURE | FLAG_SCO |
-            FLAG_BEACON | FLAG_HW_AV_SYNC | FLAG_HW_HOTWORD;
+            FLAG_BEACON | FLAG_HW_AV_SYNC | FLAG_HW_HOTWORD | FLAG_BYPASS_INTERRUPTION_POLICY |
+            FLAG_BYPASS_MUTE;
     private final static int FLAG_ALL_PUBLIC = FLAG_AUDIBILITY_ENFORCED | FLAG_HW_AV_SYNC;
 
     private int mUsage = USAGE_UNKNOWN;
diff --git a/media/java/android/media/AudioTrack.java b/media/java/android/media/AudioTrack.java
index caccb6e..cd78234 100644
--- a/media/java/android/media/AudioTrack.java
+++ b/media/java/android/media/AudioTrack.java
@@ -1178,6 +1178,9 @@ public class AudioTrack
     }
 
     private boolean isRestricted() {
+        if ((mAttributes.getFlags() & AudioAttributes.FLAG_BYPASS_INTERRUPTION_POLICY) != 0) {
+            return false;
+        }
         try {
             final int usage = AudioAttributes.usageForLegacyStreamType(mStreamType);
             final int mode = mAppOps.checkAudioOperation(AppOpsManager.OP_PLAY_AUDIO, usage,
diff --git a/media/java/android/media/MediaPlayer.java b/media/java/android/media/MediaPlayer.java
index 615dac2..fc372eb 100644
--- a/media/java/android/media/MediaPlayer.java
+++ b/media/java/android/media/MediaPlayer.java
@@ -604,6 +604,7 @@ public class MediaPlayer implements SubtitleController.Listener
     private final IAppOpsService mAppOps;
     private int mStreamType = AudioManager.USE_DEFAULT_STREAM_TYPE;
     private int mUsage = -1;
+    private boolean mBypassInterruptionPolicy;
 
     /**
      * Default constructor. Consider using one of the create() methods for
@@ -1169,6 +1170,9 @@ public class MediaPlayer implements SubtitleController.Listener
     private native void _start() throws IllegalStateException;
 
     private boolean isRestricted() {
+        if (mBypassInterruptionPolicy) {
+            return false;
+        }
         try {
             final int usage = mUsage != -1 ? mUsage
                     : AudioAttributes.usageForLegacyStreamType(getAudioStreamType());
@@ -1560,6 +1564,8 @@ public class MediaPlayer implements SubtitleController.Listener
             throw new IllegalArgumentException(msg);
         }
         mUsage = attributes.getUsage();
+        mBypassInterruptionPolicy = (attributes.getFlags()
+                & AudioAttributes.FLAG_BYPASS_INTERRUPTION_POLICY) != 0;
         Parcel pattributes = Parcel.obtain();
         attributes.writeToParcel(pattributes, AudioAttributes.FLATTEN_TAGS);
         setParameter(KEY_PARAMETER_AUDIO_ATTRIBUTES, pattributes);
diff --git a/media/java/android/media/SoundPool.java b/media/java/android/media/SoundPool.java
index 32d5b82..db6b38b 100644
--- a/media/java/android/media/SoundPool.java
+++ b/media/java/android/media/SoundPool.java
@@ -608,6 +608,9 @@ public class SoundPool {
                 int priority, int loop, float rate);
 
         private boolean isRestricted() {
+            if ((mAttributes.getFlags() & AudioAttributes.FLAG_BYPASS_INTERRUPTION_POLICY) != 0) {
+                return false;
+            }
             try {
                 final int mode = mAppOps.checkAudioOperation(AppOpsManager.OP_PLAY_AUDIO,
                         mAttributes.getUsage(),