audioflinger: fix missing track metadata

PatchTrack do not have audio attributes, so source meta data
usage must be derived from the stream type communicated
when the SW bridge audio patch is created.

Test: make.
Merged-In: I53c8ad41c1ce7266beff0362f576d2d07dd61ad5
Change-Id: I53c8ad41c1ce7266beff0362f576d2d07dd61ad5
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index d2a30b1..339cf58 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -1401,6 +1401,60 @@
             .content_type = mAttr.content_type,
             .gain = mFinalVolume,
     };
+
+    // When attributes are undefined, derive default values from stream type.
+    // See AudioAttributes.java, usageForStreamType() and Builder.setInternalLegacyStreamType()
+    if (mAttr.usage == AUDIO_USAGE_UNKNOWN) {
+        switch (mStreamType) {
+        case AUDIO_STREAM_VOICE_CALL:
+            metadata.base.usage = AUDIO_USAGE_VOICE_COMMUNICATION;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SPEECH;
+            break;
+        case AUDIO_STREAM_SYSTEM:
+            metadata.base.usage = AUDIO_USAGE_ASSISTANCE_SONIFICATION;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
+            break;
+        case AUDIO_STREAM_RING:
+            metadata.base.usage = AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
+            break;
+        case AUDIO_STREAM_MUSIC:
+            metadata.base.usage = AUDIO_USAGE_MEDIA;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_MUSIC;
+            break;
+        case AUDIO_STREAM_ALARM:
+            metadata.base.usage = AUDIO_USAGE_ALARM;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
+            break;
+        case AUDIO_STREAM_NOTIFICATION:
+            metadata.base.usage = AUDIO_USAGE_NOTIFICATION;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
+            break;
+        case AUDIO_STREAM_DTMF:
+            metadata.base.usage = AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
+            break;
+        case AUDIO_STREAM_ACCESSIBILITY:
+            metadata.base.usage = AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SPEECH;
+            break;
+        case AUDIO_STREAM_ASSISTANT:
+            metadata.base.usage = AUDIO_USAGE_ASSISTANT;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SPEECH;
+            break;
+        case AUDIO_STREAM_REROUTING:
+            metadata.base.usage = AUDIO_USAGE_VIRTUAL_SOURCE;
+            // unknown content type
+            break;
+        case AUDIO_STREAM_CALL_ASSISTANT:
+            metadata.base.usage = AUDIO_USAGE_CALL_ASSISTANT;
+            metadata.base.content_type = AUDIO_CONTENT_TYPE_SPEECH;
+            break;
+        default:
+            break;
+        }
+    }
+
     metadata.channel_mask = mChannelMask,
     strncpy(metadata.tags, mAttr.tags, AUDIO_ATTRIBUTES_TAGS_MAX_SIZE);
     *backInserter++ = metadata;