output/PipeWire: map tags "Date" and "Comment"

NEWS

@@ -22,6 +22,8 @@ ver 0.24 (not yet released)
   - "one-shot" consume mode
 * tags
   - new tags "TitleSort", "Mood"
+* output
+  - pipewire: map tags "Date" and "Comment"
 * switch to C++20
   - GCC 10 or clang 11 (or newer) recommended
 * static partition configuration

src/output/plugins/PipeWireOutputPlugin.cxx

@@ -945,6 +945,8 @@ PipeWireOutput::SendTag(const Tag &tag)
 	} tag_map[] = {
 		{ TAG_ARTIST, PW_KEY_MEDIA_ARTIST },
 		{ TAG_TITLE, PW_KEY_MEDIA_TITLE },
+		{ TAG_DATE, PW_KEY_MEDIA_DATE },
+		{ TAG_COMMENT, PW_KEY_MEDIA_COMMENT },
 	};
 
 	struct spa_dict_item items[1 + std::size(tag_map)];