who knows

src/api.vala

@@ -239,12 +239,12 @@ public class Subsonic : Object {
         return @"$(this.url)/rest/stream?id=$(Uri.escape_string(id))&$(this.parameters)";
     }
 
-    public string cover_art_uri (string id, int size) {
-        return @"$(this.url)/rest/getCoverArt?id=$(Uri.escape_string(id))&$(size)&$(this.parameters)";
+    public string cover_art_uri (string id) {
+        return @"$(this.url)/rest/getCoverArt?id=$(Uri.escape_string(id))&$(this.parameters)";
     }
 
-    public async Gdk.Pixbuf cover_art (string id, int size, Cancellable cancellable) throws Error {
-        var msg = new Soup.Message("GET", this.cover_art_uri (id, size));
+    public async Gdk.Pixbuf cover_art (string id, Cancellable cancellable) throws Error {
+        var msg = new Soup.Message("GET", this.cover_art_uri (id));
         assert (msg != null);
 
         var stream = yield this.session.send_async (msg, Priority.DEFAULT, cancellable);

src/playbin.vala

@@ -26,6 +26,8 @@ class Playbin : Object {
 
     public PlaybinState state { get; private set; default = PlaybinState.STOPPED; }
 
+    private bool update_position = false;
+
     public int64 position { get; private set; }
     public int64 duration { get; private set; }
 
@@ -45,13 +47,15 @@ class Playbin : Object {
         this.playbin.source_setup.connect (this.source_setup);
         this.playbin.about_to_finish.connect (this.about_to_finish);
 
-        // regularly update position
+        // regularly update position/duration
         Timeout.add (500, () => {
-            int64 new_position;
-            if (this.playbin.query_position (Gst.Format.TIME, out new_position)) {
-                this.position = new_position < this.duration ? new_position : this.duration;
-            } else {
-                this.position = 0;
+            if (this.update_position) {
+                int64 new_position;
+                if (this.playbin.query_position (Gst.Format.TIME, out new_position)) {
+                    this.position = new_position < this.duration ? new_position : this.duration;
+                } else {
+                    this.position = 0;
+                }
             }
 
             // keep rerunning
@@ -76,6 +80,15 @@ class Playbin : Object {
         });
 
         bus.message["stream-start"].connect ((message) => {
+            int64 new_duration;
+            if (this.playbin.query_duration (Gst.Format.TIME, out new_duration)) {
+                this.duration = new_duration;
+            } else {
+                warning ("could not obtain new stream duration");
+            }
+
+            this.position = 0;
+
             if (notify_next_transition) {
                 this.song_transition ((string) this.playbin.current_uri);
             } else {
@@ -83,10 +96,13 @@ class Playbin : Object {
             }
         });
 
-        bus.message["async-done"].connect ((message) => {
-            int64 new_duration;
-            assert (this.playbin.query_duration (Gst.Format.TIME, out new_duration));
-            this.duration = new_duration;
+        bus.message["state-changed"].connect ((message) => {
+            if (message.src != this.playbin) return;
+
+            Gst.State new_state;
+            message.parse_state_changed (null, out new_state, null);
+
+            this.update_position = new_state == Gst.State.PLAYING;
         });
         
         bus.message["eos"].connect ((message) => {

src/ui/window.blp

@@ -99,18 +99,24 @@ template $UiWindow: Adw.ApplicationWindow {
 
         Label {
           styles [ "heading" ]
+          xalign: 0;
           halign: start;
           label: bind template.song as <$Song>.title;
           ellipsize: end;
         }
 
-        Box {
-          halign: start;
-          Label {
-            styles [ "caption" ]
-            label: bind $format_song_below_title (template.song) as <string>;
-            ellipsize: end;
-          }
+        Label {
+          styles [ "caption" ]
+          xalign: 0;
+          label: bind template.song as <$Song>.artist;
+          ellipsize: end;
+        }
+
+        Label {
+          styles [ "caption" ]
+          xalign: 0;
+          label: bind template.song as <$Song>.album;
+          ellipsize: end;
         }
       }
 

src/ui/window.vala

@@ -26,6 +26,8 @@ class Ui.Window : Adw.ApplicationWindow {
     public bool cover_art_loading { get; set; default = false; }
     public Gdk.Paintable playing_cover_art { get; set; }
 
+    private Gdk.Paintable next_cover_art = null;
+
     internal Playbin playbin { get; default = new Playbin (); }
 
     public Window (Gtk.Application app) {
@@ -122,12 +124,12 @@ class Ui.Window : Adw.ApplicationWindow {
             }
             this.cancel_loading_art = new Cancellable ();
 
-            this.playing_cover_art = Gdk.Paintable.empty (100, 100);
+            this.playing_cover_art = Gdk.Paintable.empty (1, 1);
             if (this.song != null) {
                 this.cover_art_loading = true;
 
                 string song_id = this.song.id;
-                public_api.cover_art.begin (song_id, 100, this.cancel_loading_art, (obj, res) => {
+                public_api.cover_art.begin (song_id, this.cancel_loading_art, (obj, res) => {
                     try {
                         this.playing_cover_art = Gdk.Texture.for_pixbuf (public_api.cover_art.end (res));
                         this.cover_art_loading = false;
@@ -220,10 +222,6 @@ class Ui.Window : Adw.ApplicationWindow {
         this.setup.present (this);
     }
 
-    [GtkCallback] private string format_song_below_title (Song? song) {
-        return song == null ? "" : @"$(song.artist) - $(song.album) - $(song.year)";
-    }
-
     [GtkCallback] private void seek_backward () {
         // 10 seconds
         int64 new_position = position - (int64)10 * 1000 * 1000000;