diff --git a/media/audioaidlconversion/AidlConversionNdk.cpp b/media/audioaidlconversion/AidlConversionNdk.cpp
index 9b14a5e..7ab616a 100644
--- a/media/audioaidlconversion/AidlConversionNdk.cpp
+++ b/media/audioaidlconversion/AidlConversionNdk.cpp
@@ -35,6 +35,7 @@
 
 using hardware::audio::common::PlaybackTrackMetadata;
 using hardware::audio::common::RecordTrackMetadata;
+using hardware::audio::common::SourceMetadata;
 using ::android::BAD_VALUE;
 using ::android::OK;
 
@@ -194,5 +195,16 @@
     return aidl;
 }
 
+// static
+ConversionResult<SourceMetadata>
+legacy2aidl_SourceMetadata(const std::vector<playback_track_metadata_v7_t>& legacy) {
+    SourceMetadata aidl;
+    aidl.tracks = VALUE_OR_RETURN(
+            convertContainer<std::vector<PlaybackTrackMetadata>>(
+                    legacy,
+                    legacy2aidl_playback_track_metadata_v7_PlaybackTrackMetadata));
+    return aidl;
+}
+
 }  // namespace android
 }  // aidl