From 09818c15500a04eac6b9998144c1ca54b8a54109 Mon Sep 17 00:00:00 2001
From: Jean-Michel Trivi <jmtrivi@google.com>
Date: Fri, 18 Jul 2014 17:19:03 -0700
Subject: [PATCH] Add AudioAttributes to stream type conversion

Framework internal conversion for going from an AudioAttributes
 instance to a legacy stream type.

Change-Id: Ic3b7d2cf4aa0ac5255aa5897a25c78c940af9f77
---
 media/java/android/media/AudioAttributes.java | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/media/java/android/media/AudioAttributes.java b/media/java/android/media/AudioAttributes.java
index 7a3092092beda..0fb77d5cb7107 100644
--- a/media/java/android/media/AudioAttributes.java
+++ b/media/java/android/media/AudioAttributes.java
@@ -524,6 +524,45 @@ public final class AudioAttributes implements Parcelable {
         }
     }
 
+    /** @hide */
+    public static int toLegacyStreamType(AudioAttributes aa) {
+        // flags to stream type mapping
+        if ((aa.getFlags() & FLAG_AUDIBILITY_ENFORCED) == FLAG_AUDIBILITY_ENFORCED) {
+            return AudioSystem.STREAM_SYSTEM_ENFORCED;
+        }
+        if ((aa.getFlags() & FLAG_SCO) == FLAG_SCO) {
+            return AudioSystem.STREAM_BLUETOOTH_SCO;
+        }
+
+        // usage to stream type mapping
+        switch (aa.getUsage()) {
+            case USAGE_MEDIA:
+            case USAGE_GAME:
+            case USAGE_ASSISTANCE_ACCESSIBILITY:
+            case USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
+                return AudioSystem.STREAM_MUSIC;
+            case USAGE_ASSISTANCE_SONIFICATION:
+                return AudioSystem.STREAM_SYSTEM;
+            case USAGE_VOICE_COMMUNICATION:
+                return AudioSystem.STREAM_VOICE_CALL;
+            case USAGE_VOICE_COMMUNICATION_SIGNALLING:
+                return AudioSystem.STREAM_DTMF;
+            case USAGE_ALARM:
+                return AudioSystem.STREAM_ALARM;
+            case USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
+                return AudioSystem.STREAM_RING;
+            case USAGE_NOTIFICATION:
+            case USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
+            case USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
+            case USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
+            case USAGE_NOTIFICATION_EVENT:
+                return AudioSystem.STREAM_NOTIFICATION;
+            case USAGE_UNKNOWN:
+            default:
+                return AudioSystem.STREAM_MUSIC;
+        }
+    }
+
     /** @hide */
     @IntDef({
         USAGE_UNKNOWN,