Fix behavior after last track of an album/playlist

* When autoplay is disabled, then loop back to the first track
   instead of 10 tracks back. Continue or stop playing depending
   on the state of the repeat button.

 * When autoplay is enabled, then extend the playlist *after* the
   last track. #844 broke this such that the last track of an album
   or playlist was never played.

Fixes: #434

CHANGELOG.md

@@ -46,6 +46,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - [connect] Fix step size on volume up/down events
+- [connect] Fix looping back to the first track after the last track of an album or playlist
 - [playback] Incorrect `PlayerConfig::default().normalisation_threshold` caused distortion when using dynamic volume normalisation downstream 
 - [playback] Fix `log` and `cubic` volume controls to be mute at zero volume
 - [playback] Fix `S24_3` format on big-endian systems

connect/src/spirc.rs

@@ -84,7 +84,6 @@ struct SpircTaskConfig {
     autoplay: bool,
 }
 
-const CONTEXT_TRACKS_HISTORY: usize = 10;
 const CONTEXT_FETCH_THRESHOLD: u32 = 5;
 
 const VOLUME_STEPS: i64 = 64;
@@ -887,8 +886,8 @@ impl SpircTask {
         let tracks_len = self.state.get_track().len() as u32;
         debug!(
             "At track {:?} of {:?} <{:?}> update [{}]",
-            new_index,
+            new_index + 1,
-            self.state.get_track().len(),
+            tracks_len,
             self.state.get_context_uri(),
             tracks_len - new_index < CONTEXT_FETCH_THRESHOLD
         );
@@ -902,27 +901,25 @@ impl SpircTask {
             self.context_fut = self.resolve_station(&context_uri);
             self.update_tracks_from_context();
         }
-        let last_track = new_index == tracks_len - 1;
+        if new_index >= tracks_len {
-        if self.config.autoplay && last_track {
+            if self.config.autoplay {
                 // Extend the playlist
-            // Note: This doesn't seem to reflect in the UI
-            // the additional tracks in the frame don't show up as with station view
                 debug!("Extending playlist <{}>", context_uri);
                 self.update_tracks_from_context();
-        }
+                self.player.set_auto_normalise_as_album(false);
-        if new_index >= tracks_len {
+            } else {
-            new_index = 0; // Loop around back to start
+                new_index = 0;
                 continue_playing = self.state.get_repeat();
+                debug!(
+                    "Looping around back to start, repeat is {}",
+                    continue_playing
+                );
+            }
         }
 
         if tracks_len > 0 {
             self.state.set_playing_track_index(new_index);
             self.load_track(continue_playing, 0);
-            if self.config.autoplay && last_track {
-                // If we're now playing the last track of an album, then
-                // switch to track normalisation mode for the autoplay to come.
-                self.player.set_auto_normalise_as_album(false);
-            }
         } else {
             info!("Not playing next track because there are no more tracks left in queue.");
             self.state.set_playing_track_index(0);
@@ -1054,21 +1051,9 @@ impl SpircTask {
             let new_tracks = &context.tracks;
             debug!("Adding {:?} tracks from context to frame", new_tracks.len());
             let mut track_vec = self.state.take_track().into_vec();
-            if let Some(head) = track_vec.len().checked_sub(CONTEXT_TRACKS_HISTORY) {
-                track_vec.drain(0..head);
-            }
             track_vec.extend_from_slice(new_tracks);
             self.state
                 .set_track(protobuf::RepeatedField::from_vec(track_vec));
-
-            // Update playing index
-            if let Some(new_index) = self
-                .state
-                .get_playing_track_index()
-                .checked_sub(CONTEXT_TRACKS_HISTORY as u32)
-            {
-                self.state.set_playing_track_index(new_index);
-            }
         } else {
             warn!("No context to update from!");
         }