Implemented the metadata changed notification filters.

IMediaPlayer:
new setMetadataFilter method so set a filter (2 lists of allowed and blocked metadata type)
serialized in a Parcel.

MediaPlayer.java/android_media_MediaPlayer.cpp/mediaplayer.cpp
new setMetadataFilter that passes the filter down to the MediaPlayerService's binder interface.

MediaPlayerService.cpp
The Client inner class holds the allowed and blocked metadata types.
These are in 2 vectors that get populated in the setMetadataFilter.

A new shourldDropMetadata method returns true if a type of metadata should be dropped according
to the filters.

The notify method in run the metadata update notifications thru the filter and possibly drop them.

1 files changed, 15 insertions, 0 deletions

diff --git a/media/libmedia/IMediaPlayer.cpp b/media/libmedia/IMediaPlayer.cpp
index 3f278f4..131e510 100644
--- a/media/libmedia/IMediaPlayer.cpp
+++ b/media/libmedia/IMediaPlayer.cpp
@@ -41,6 +41,7 @@ enum {
     SET_LOOPING,
     SET_VOLUME,
     INVOKE,
+    SET_METADATA_FILTER,
 };
 
 class BpMediaPlayer: public BpInterface<IMediaPlayer>
@@ -178,6 +179,15 @@ public:
         status_t retcode = remote()->transact(INVOKE, request, reply);
         return retcode;
     }
+
+    status_t setMetadataFilter(const Parcel& request)
+    {
+        Parcel reply;
+        // Avoid doing any extra copy of the request. The interface
+        // descriptor should have been set by MediaPlayer.java.
+        remote()->transact(SET_METADATA_FILTER, request, &reply);
+        return reply.readInt32();
+    }
 };
 
 IMPLEMENT_META_INTERFACE(MediaPlayer, "android.media.IMediaPlayer");
@@ -273,6 +283,11 @@ status_t BnMediaPlayer::onTransact(
             invoke(data, reply);
             return NO_ERROR;
         } break;
+        case SET_METADATA_FILTER: {
+            CHECK_INTERFACE(IMediaPlayer, data, reply);
+            reply->writeInt32(setMetadataFilter(data));
+            return NO_ERROR;
+        } break;
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }