Tag: use SignedSongTime for the song duration

src/db/plugins/ProxyDatabasePlugin.cxx

@@ -199,7 +199,10 @@ ProxySong::ProxySong(const mpd_song *song)
 #endif
 
 	TagBuilder tag_builder;
-	tag_builder.SetTime(mpd_song_get_duration(song));
+
+	const unsigned duration = mpd_song_get_duration(song);
+	if (duration > 0)
+		tag_builder.SetDuration(SignedSongTime::FromS(duration));
 
 	for (const auto *i = &tag_table[0]; i->d != TAG_NUM_OF_ITEM_TYPES; ++i)
 		Copy(tag_builder, i->d, song, i->s);

src/db/plugins/upnp/Directory.cxx

@@ -59,28 +59,28 @@ ParseItemClass(const char *name, size_t length)
 }
 
 gcc_pure
-static int
+static SignedSongTime
 ParseDuration(const char *duration)
 {
 	char *endptr;
 
 	unsigned result = ParseUnsigned(duration, &endptr);
 	if (endptr == duration || *endptr != ':')
-		return 0;
+		return SignedSongTime::Negative();
 
 	result *= 60;
 	duration = endptr + 1;
 	result += ParseUnsigned(duration, &endptr);
 	if (endptr == duration || *endptr != ':')
-		return 0;
+		return SignedSongTime::Negative();
 
 	result *= 60;
 	duration = endptr + 1;
 	result += ParseUnsigned(duration, &endptr);
 	if (endptr == duration || *endptr != 0)
-		return 0;
+		return SignedSongTime::Negative();
 
-	return result;
+	return SignedSongTime::FromS(result);
 }
 
 /**
@@ -183,7 +183,7 @@ protected:
 				const char *duration =
 					GetAttribute(attrs, "duration");
 				if (duration != nullptr)
-					tag.SetTime(ParseDuration(duration));
+					tag.SetDuration(ParseDuration(duration));
 
 				state = RES;
 			}