1 files changed, 64 insertions, 0 deletions
diff --git a/include/media/AudioPolicyHelper.h b/include/media/AudioPolicyHelper.h
new file mode 100644
index 0000000..f4afd45
--- /dev/null
+++ b/include/media/AudioPolicyHelper.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef AUDIO_POLICY_HELPER_H_
+#define AUDIO_POLICY_HELPER_H_
+
+#include <system/audio.h>
+
+audio_stream_type_t audio_attributes_to_stream_type(const audio_attributes_t *attr)
+{
+    // flags to stream type mapping
+    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
+        return AUDIO_STREAM_ENFORCED_AUDIBLE;
+    }
+    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
+        return AUDIO_STREAM_BLUETOOTH_SCO;
+    }
+
+    // usage to stream type mapping
+    switch (attr->usage) {
+    case AUDIO_USAGE_MEDIA:
+    case AUDIO_USAGE_GAME:
+    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
+    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
+        return AUDIO_STREAM_MUSIC;
+    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
+        return AUDIO_STREAM_SYSTEM;
+    case AUDIO_USAGE_VOICE_COMMUNICATION:
+        return AUDIO_STREAM_VOICE_CALL;
+
+    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
+        return AUDIO_STREAM_DTMF;
+
+    case AUDIO_USAGE_ALARM:
+        return AUDIO_STREAM_ALARM;
+    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
+        return AUDIO_STREAM_RING;
+
+    case AUDIO_USAGE_NOTIFICATION:
+    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
+    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
+    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
+    case AUDIO_USAGE_NOTIFICATION_EVENT:
+        return AUDIO_STREAM_NOTIFICATION;
+
+    case AUDIO_USAGE_UNKNOWN:
+    default:
+        return AUDIO_STREAM_MUSIC;
+    }
+}
+
+#endif //AUDIO_POLICY_HELPER_H_