db/Stats: use std::chrono::duration for the total duration

src/Stats.cxx

@@ -99,15 +99,18 @@ db_stats_print(Client &client, const Database &db)
 	if (!stats_update(db))
 		return;
 
+	unsigned total_duration_s =
+		std::chrono::duration_cast<std::chrono::seconds>(stats.total_duration).count();
+
 	client_printf(client,
 		      "artists: %u\n"
 		      "albums: %u\n"
 		      "songs: %u\n"
-		      "db_playtime: %lu\n",
+		      "db_playtime: %u\n",
 		      stats.artist_count,
 		      stats.album_count,
 		      stats.song_count,
-		      stats.total_duration);
+		      total_duration_s);
 
 	const time_t update_stamp = db.GetUpdateStamp();
 	if (update_stamp > 0)

src/db/Helpers.cxx

@@ -41,7 +41,7 @@ StatsVisitTag(DatabaseStats &stats, StringSet &artists, StringSet &albums,
 	      const Tag &tag)
 {
 	if (!tag.duration.IsNegative())
-		stats.total_duration += tag.duration.ToS();
+		stats.total_duration += tag.duration;
 
 	for (const auto &item : tag) {
 		switch (item.type) {

src/db/Stats.hxx

@@ -20,6 +20,8 @@
 #ifndef MPD_DATABASE_STATS_HXX
 #define MPD_DATABASE_STATS_HXX
 
+#include "Chrono.hxx"
+
 struct DatabaseStats {
 	/**
 	 * Number of songs.
@@ -29,7 +31,7 @@ struct DatabaseStats {
 	/**
 	 * Total duration of all songs (in seconds).
 	 */
-	unsigned long total_duration;
+	std::chrono::duration<std::uint64_t, SongTime::period> total_duration;
 
 	/**
 	 * Number of distinct artist names.
@@ -43,7 +45,7 @@ struct DatabaseStats {
 
 	void Clear() {
 		song_count = 0;
-		total_duration = 0;
+		total_duration = total_duration.zero();
 		artist_count = album_count = 0;
 	}
 };

src/db/plugins/ProxyDatabasePlugin.cxx

@@ -807,7 +807,7 @@ ProxyDatabase::GetStats(const DatabaseSelection &selection,
 	update_stamp = (time_t)mpd_stats_get_db_update_time(stats2);
 
 	stats.song_count = mpd_stats_get_number_of_songs(stats2);
-	stats.total_duration = mpd_stats_get_db_play_time(stats2);
+	stats.total_duration = std::chrono::seconds(mpd_stats_get_db_play_time(stats2));
 	stats.artist_count = mpd_stats_get_number_of_artists(stats2);
 	stats.album_count = mpd_stats_get_number_of_albums(stats2);
 	mpd_stats_free(stats2);