playlist: track song metadata changes

When the tag of the current song changes (e.g. a new tag was sent in
the stream), update the playlist, so clients pick up the new tag.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/playlist.h b/src/playlist.h
index 34da9f9a..137475af 100644
--- a/src/playlist.h
+++ b/src/playlist.h
@@ -54,6 +54,11 @@ typedef struct _Playlist {
 	bool repeat;
 	bool random;
 	uint32_t version;
+
+	/** used by syncCurrentPlayerDecodeMetadata() to detect tag changes */
+	const struct song *prev_song;
+	/** used by syncCurrentPlayerDecodeMetadata() to detect tag changes */
+	const struct tag *prev_tag;
 } Playlist;
 
 extern bool playlist_saveAbsolutePaths;