Add autoplay mode to queue similar tracks when nearing end of play queue

backend/app.go

@@ -361,6 +361,7 @@ func (a *App) Shutdown() {
 		repeatMode = "All"
 	}
 	a.Config.Playback.RepeatMode = repeatMode
+	a.Config.Playback.Autoplay = a.PlaybackManager.IsAutoplay()
 	a.Config.LocalPlayback.Volume = a.LocalPlayer.GetVolume()
 	a.SavePlayQueueIfEnabled()
 	a.SaveConfigFile()

backend/config.go

@@ -99,6 +99,7 @@ type NowPlayingPageConfig struct {
 }
 
 type PlaybackConfig struct {
+	Autoplay   bool
 	RepeatMode string
 }
 
@@ -215,6 +216,7 @@ func DefaultConfig(appVersionTag string) *Config {
 			TracklistColumns: []string{"Album", "Time", "Plays"},
 		},
 		Playback: PlaybackConfig{
+			Autoplay:   false,
 			RepeatMode: "None",
 		},
 		LocalPlayback: LocalPlaybackConfig{

backend/playbackmanager.go

@@ -5,11 +5,14 @@ import (
 	"fmt"
 	"log"
 	"math/rand"
+	"runtime"
+	"slices"
 	"time"
 
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
 	"github.com/dweymouth/supersonic/backend/player"
 	"github.com/dweymouth/supersonic/backend/player/mpv"
+	"github.com/dweymouth/supersonic/sharedutil"
 )
 
 // A high-level MediaProvider-aware playback engine, serves as an
@@ -19,6 +22,8 @@ type PlaybackManager struct {
 	cmdQueue *playbackCommandQueue
 	cfg      *AppConfig
 
+	autoplay bool
+
 	lastPlayTime float64
 }
 
@@ -37,21 +42,32 @@ func NewPlaybackManager(
 		engine:   e,
 		cmdQueue: q,
 		cfg:      appCfg,
+		autoplay: playbackCfg.Autoplay,
 	}
-	pm.workaroundWindowsPlaybackIssue()
+	pm.addOnTrackChangeHook()
 	go pm.runCmdQueue(ctx)
 	return pm
 }
 
-func (p *PlaybackManager) workaroundWindowsPlaybackIssue() {
+func (p *PlaybackManager) addOnTrackChangeHook() {
 	// See https://github.com/dweymouth/supersonic/issues/483
 	// On Windows, MPV sometimes fails to start playback when switching to a track
 	// with a different sample rate than the previous. If this is detected,
 	// send a command to the MPV player to force restart playback.
 	p.OnPlayTimeUpdate(func(curTime, _ float64, _ bool) {
 		p.lastPlayTime = curTime
 	})
+
 	p.OnSongChange(func(mediaprovider.MediaItem, *mediaprovider.Track) {
+		// Autoplay if enabled and we are on the last track
+		if p.autoplay && p.NowPlayingIndex() == len(p.engine.playQueue)-1 {
+			p.enqueueAutoplayTracks()
+		}
+
+		if runtime.GOOS != "windows" {
+			return
+		}
+		// workaround for https://github.com/dweymouth/supersonic/issues/483 (see above comment)
 		if p.NowPlayingIndex() != len(p.engine.playQueue) && p.PlayerStatus().State == player.Playing {
 			p.lastPlayTime = 0
 			go func() {
@@ -348,6 +364,10 @@ func (p *PlaybackManager) GetLoopMode() LoopMode {
 	return p.engine.loopMode
 }
 
+func (p *PlaybackManager) IsAutoplay() bool {
+	return p.autoplay
+}
+
 func (p *PlaybackManager) PlayerStatus() player.Status {
 	return p.engine.PlayerStatus()
 }
@@ -356,6 +376,13 @@ func (p *PlaybackManager) SetVolume(vol int) {
 	p.cmdQueue.SetVolume(vol)
 }
 
+func (p *PlaybackManager) SetAutoplay(autoplay bool) {
+	p.autoplay = autoplay
+	if autoplay && p.NowPlayingIndex() == len(p.engine.playQueue)-1 {
+		p.enqueueAutoplayTracks()
+	}
+}
+
 func (p *PlaybackManager) Volume() int {
 	return p.engine.CurrentPlayer().GetVolume()
 }
@@ -419,6 +446,84 @@ func (p *PlaybackManager) PlayPause() {
 	}
 }
 
+func (p *PlaybackManager) enqueueAutoplayTracks() {
+	nowPlaying := p.NowPlaying()
+	if nowPlaying == nil {
+		return
+	}
+
+	s := p.engine.sm.Server
+	if s == nil {
+		return
+	}
+
+	// last 500 played items
+	queue := p.GetPlayQueue()
+	if l := len(queue); l > 500 {
+		queue = queue[l-500:]
+	}
+
+	// tracks we will enqueue
+	var tracks []*mediaprovider.Track
+
+	filterRecentlyPlayed := func(tracks []*mediaprovider.Track) []*mediaprovider.Track {
+		return sharedutil.FilterSlice(tracks, func(t *mediaprovider.Track) bool {
+			return !slices.ContainsFunc(queue, func(i mediaprovider.MediaItem) bool {
+				return i.Metadata().Type == mediaprovider.MediaItemTypeTrack && i.Metadata().ID == t.ID
+			})
+		})
+	}
+
+	// since this func is invoked in a callback from the playback engine,
+	// need to do the rest async as it may take time and block other callbacks
+	go func() {
+		// first 2 strategies - similar by artist, and similar by genres - only work for tracks
+		if nowPlaying.Metadata().Type == mediaprovider.MediaItemTypeTrack {
+			tr := nowPlaying.(*mediaprovider.Track)
+
+			// similar tracks by artist
+			if len(tr.ArtistIDs) > 0 {
+				similar, err := s.GetSimilarTracks(tr.ArtistIDs[0], p.cfg.EnqueueBatchSize)
+				if err != nil {
+					log.Println("autoplay error: failed to get similar tracks: %v", err)
+				}
+				tracks = filterRecentlyPlayed(similar)
+			}
+
+			// fallback to random tracks from genre
+			if len(tracks) == 0 {
+				for _, g := range tr.Genres {
+					if g == "" {
+						continue
+					}
+					byGenre, err := s.GetRandomTracks(g, p.cfg.EnqueueBatchSize)
+					if err != nil {
+						log.Println("autoplay error: failed to get tracks by genre: %v", err)
+					}
+					tracks = filterRecentlyPlayed(byGenre)
+					if len(tracks) > 0 {
+						break
+					}
+				}
+			}
+		}
+
+		// random tracks works regardless of the type of the last playing media
+		if len(tracks) == 0 {
+			// fallback to random tracks
+			random, err := s.GetRandomTracks("", p.cfg.EnqueueBatchSize)
+			if err != nil {
+				log.Println("autoplay error: failed to get random tracks: %v", err)
+			}
+			tracks = filterRecentlyPlayed(random)
+		}
+
+		if len(tracks) > 0 {
+			p.LoadTracks(tracks, Append, false /*no need to shuffle, already random*/)
+		}
+	}()
+}
+
 func (p *PlaybackManager) runCmdQueue(ctx context.Context) {
 	logIfErr := func(action string, err error) {
 		if err != nil {

res/bundled_gen.sh

@@ -7,6 +7,7 @@ fyne bundle -append -prefix Res icons/publicdomain/disc.svg >> bundled.go
 fyne bundle -append -prefix Res icons/publicdomain/headphones.svg >> bundled.go
 fyne bundle -append -prefix Res icons/publicdomain/heart-filled.svg >> bundled.go
 fyne bundle -append -prefix Res icons/publicdomain/heart-outline.svg >> bundled.go
+fyne bundle -append -prefix Res icons/publicdomain/infinity.svg >> bundled.go
 fyne bundle -append -prefix Res icons/publicdomain/musicnotes.svg >> bundled.go
 fyne bundle -append -prefix Res icons/publicdomain/people.svg >> bundled.go
 fyne bundle -append -prefix Res icons/publicdomain/playlist.svg >> bundled.go

res/translations/en.json

@@ -28,6 +28,7 @@
     "Audiobook": "Audiobook",
     "Authentication failed": "Authentication failed",
     "Auto": "Auto",
+    "Autoplay": "Autoplay",
     "Autoselect device": "Autoselect device",
     "Back": "Back",
     "Bit rate": "Bit rate",

ui/bottompanel.go

@@ -102,7 +102,7 @@ func NewBottomPanel(pm *backend.PlaybackManager, im *backend.ImageManager, contr
 		pm.SeekFraction(f)
 	})
 
-	bp.AuxControls = widgets.NewAuxControls(pm.Volume(), pm.GetLoopMode())
+	bp.AuxControls = widgets.NewAuxControls(pm.Volume(), pm.GetLoopMode(), pm.IsAutoplay())
 	pm.OnLoopModeChange(bp.AuxControls.SetLoopMode)
 	pm.OnVolumeChange(bp.AuxControls.VolumeControl.SetVolume)
 	bp.AuxControls.VolumeControl.OnSetVolume = func(v int) {
@@ -111,6 +111,9 @@ func NewBottomPanel(pm *backend.PlaybackManager, im *backend.ImageManager, contr
 	bp.AuxControls.OnChangeLoopMode(func() {
 		pm.SetNextLoopMode()
 	})
+	bp.AuxControls.OnChangeAutoplay = func(autoplay bool) {
+		pm.SetAutoplay(autoplay)
+	}
 	bp.AuxControls.OnShowPlayQueue(contr.ShowPopUpPlayQueue)
 
 	bp.imageLoader = util.NewThumbnailLoader(im, bp.NowPlaying.SetImage)

ui/mainwindow.go

@@ -160,6 +160,7 @@ func NewMainWindow(fyneApp fyne.App, appName, displayAppName, appVersion string,
 			repeatMode = "All"
 		}
 		app.Config.Playback.RepeatMode = repeatMode
+		app.Config.Playback.Autoplay = app.PlaybackManager.IsAutoplay()
 		app.SavePlayQueueIfEnabled()
 		app.SaveConfigFile()
 

ui/theme/theme.go

@@ -38,6 +38,7 @@ var (
 
 	AlbumIcon       fyne.Resource = theme.NewThemedResource(res.ResDiscSvg)
 	ArtistIcon      fyne.Resource = theme.NewThemedResource(res.ResPeopleSvg)
+	AutoplayIcon    fyne.Resource = theme.NewThemedResource(res.ResInfinitySvg)
 	RadioIcon       fyne.Resource = theme.NewThemedResource(res.ResBroadcastSvg)
 	FavoriteIcon    fyne.Resource = theme.NewThemedResource(res.ResHeartFilledSvg)
 	NotFavoriteIcon fyne.Resource = theme.NewThemedResource(res.ResHeartOutlineSvg)

ui/widgets/auxcontrols.go

@@ -18,21 +18,34 @@ import (
 type AuxControls struct {
 	widget.BaseWidget
 
+	OnChangeAutoplay func(autoplay bool)
+
 	VolumeControl *VolumeControl
+	autoplay      *IconButton
 	loop          *IconButton
 	showQueue     *IconButton
 
 	container *fyne.Container
 }
 
-func NewAuxControls(initialVolume int, initialLoopMode backend.LoopMode) *AuxControls {
+func NewAuxControls(initialVolume int, initialLoopMode backend.LoopMode, initialAutoplay bool) *AuxControls {
 	a := &AuxControls{
 		VolumeControl: NewVolumeControl(initialVolume),
+		autoplay:      NewIconButton(myTheme.AutoplayIcon, nil),
 		loop:          NewIconButton(myTheme.RepeatIcon, nil),
 		showQueue:     NewIconButton(myTheme.PlayQueueIcon, nil),
 	}
 	a.loop.IconSize = IconButtonSizeSmaller
 	a.loop.SetToolTip(lang.L("Repeat"))
+	a.autoplay.Highlighted = initialAutoplay
+	//a.autoplay.IconSize = IconButtonSizeSmaller
+	a.autoplay.SetToolTip(lang.L("Autoplay"))
+	a.autoplay.OnTapped = func() {
+		a.SetAutoplay(!a.autoplay.Highlighted)
+		if a.OnChangeAutoplay != nil {
+			a.OnChangeAutoplay(a.autoplay.Highlighted)
+		}
+	}
 	a.SetLoopMode(initialLoopMode)
 	a.showQueue.IconSize = IconButtonSizeSmaller
 	a.showQueue.SetToolTip(lang.L("Show play queue"))
@@ -43,7 +56,7 @@ func NewAuxControls(initialVolume int, initialLoopMode backend.LoopMode) *AuxCon
 			a.VolumeControl,
 			container.New(
 				layout.NewCustomPaddedHBoxLayout(theme.Padding()*1.5),
-				layout.NewSpacer(), a.loop, a.showQueue, util.NewHSpace(5)),
+				layout.NewSpacer(), a.autoplay, a.loop, a.showQueue, util.NewHSpace(5)),
 			layout.NewSpacer(),
 		),
 	)
@@ -73,6 +86,14 @@ func (a *AuxControls) SetLoopMode(mode backend.LoopMode) {
 	}
 }
 
+func (a *AuxControls) SetAutoplay(autoplay bool) {
+	if autoplay == a.autoplay.Highlighted {
+		return
+	}
+	a.autoplay.Highlighted = autoplay
+	a.autoplay.Refresh()
+}
+
 func (a *AuxControls) OnShowPlayQueue(f func()) {
 	a.showQueue.OnTapped = f
 }