Add setting to disable server transcoding

backend/app.go

@@ -101,7 +101,7 @@ func StartupApp(appName, displayAppName, appVersionTag, configFile, latestReleas
 	}
 
 	a.ServerManager = NewServerManager(appName, a.Config)
-	a.PlaybackManager = NewPlaybackManager(a.bgrndCtx, a.ServerManager, a.Player, &a.Config.Scrobbling)
+	a.PlaybackManager = NewPlaybackManager(a.bgrndCtx, a.ServerManager, a.Player, &a.Config.Scrobbling, &a.Config.Transcoding)
 	a.ImageManager = NewImageManager(a.bgrndCtx, a.ServerManager, configdir.LocalCache(a.appName))
 	a.Config.Application.MaxImageCacheSizeMB = clamp(a.Config.Application.MaxImageCacheSizeMB, 1, 500)
 	a.ImageManager.SetMaxOnDiskCacheSizeBytes(int64(a.Config.Application.MaxImageCacheSizeMB) * 1_048_576)

backend/config.go

@@ -98,6 +98,10 @@ type ThemeConfig struct {
 	Appearance string
 }
 
+type TranscodingConfig struct {
+	ForceRawFile bool
+}
+
 type Config struct {
 	Application    AppConfig
 	Servers        []*ServerConfig
@@ -112,6 +116,7 @@ type Config struct {
 	LocalPlayback  LocalPlaybackConfig
 	Scrobbling     ScrobbleConfig
 	ReplayGain     ReplayGainConfig
+	Transcoding    TranscodingConfig
 	Theme          ThemeConfig
 }
 
@@ -176,6 +181,9 @@ func DefaultConfig(appVersionTag string) *Config {
 			PreampGainDB:    0.0,
 			PreventClipping: true,
 		},
+		Transcoding: TranscodingConfig{
+			ForceRawFile: false,
+		},
 		Theme: ThemeConfig{
 			Appearance: "Dark",
 		},

backend/mediaprovider/mediaprovider.go

@@ -67,7 +67,7 @@ type MediaProvider interface {
 
 	GetFavorites() (Favorites, error)
 
-	GetStreamURL(trackID string) (string, error)
+	GetStreamURL(trackID string, forceRaw bool) (string, error)
 
 	GetTopTracks(artist Artist, count int) ([]*Track, error)
 

backend/mediaprovider/subsonic/subsonicmediaprovider.go

@@ -192,8 +192,12 @@ func (s *subsonicMediaProvider) GetSimilarTracks(artistID string, count int) ([]
 	return sharedutil.MapSlice(tr, toTrack), nil
 }
 
-func (s *subsonicMediaProvider) GetStreamURL(trackID string) (string, error) {
+func (s *subsonicMediaProvider) GetStreamURL(trackID string, forceRaw bool) (string, error) {
-	u, err := s.client.GetStreamURL(trackID, map[string]string{})
+	m := make(map[string]string)
+	if forceRaw {
+		m["format"] = "raw"
+	}
+	u, err := s.client.GetStreamURL(trackID, m)
 	if err != nil {
 		return "", err
 	}

backend/playbackmanager.go

@@ -45,6 +45,7 @@ type PlaybackManager struct {
 	// to pass to onSongChange listeners; clear once listeners have been called
 	lastScrobbled *mediaprovider.Track
 	scrobbleCfg   *ScrobbleConfig
+	transcodeCfg  *TranscodingConfig
 
 	onSongChange     []func(nowPlaying, justScrobbledIfAny *mediaprovider.Track)
 	onPlayTimeUpdate []func(float64, float64)
@@ -57,14 +58,16 @@ func NewPlaybackManager(
 	s *ServerManager,
 	p *player.Player,
 	scrobbleCfg *ScrobbleConfig,
+	transcodeCfg *TranscodingConfig,
 ) *PlaybackManager {
 	// clamp to 99% to avoid any possible rounding issues
 	scrobbleCfg.ThresholdPercent = clamp(scrobbleCfg.ThresholdPercent, 0, 99)
 	pm := &PlaybackManager{
-		ctx:         ctx,
+		ctx:          ctx,
-		sm:          s,
+		sm:           s,
-		player:      p,
+		player:       p,
-		scrobbleCfg: scrobbleCfg,
+		scrobbleCfg:  scrobbleCfg,
+		transcodeCfg: transcodeCfg,
 	}
 	p.OnTrackChange(func(tracknum int64) {
 		if tracknum >= int64(len(pm.playQueue)) {
@@ -177,7 +180,7 @@ func (p *PlaybackManager) LoadTracks(tracks []*mediaprovider.Track, appendToQueu
 		util.ShuffleSlice(nums)
 	}
 	for _, i := range nums {
-		url, err := p.sm.Server.GetStreamURL(tracks[i].ID)
+		url, err := p.sm.Server.GetStreamURL(tracks[i].ID, p.transcodeCfg.ForceRawFile)
 		if err != nil {
 			return err
 		}

ui/dialogs/settingsdialog.go

@@ -241,6 +241,7 @@ func (s *SettingsDialog) createGeneralTab() *container.TabItem {
 }
 
 func (s *SettingsDialog) createPlaybackTab() *container.TabItem {
+	disableTranscode := widget.NewCheckWithData("Disable server transcoding", binding.BindBool(&s.config.Transcoding.ForceRawFile))
 	deviceList := make([]string, len(s.audioDevices))
 	var selIndex int
 	for i, dev := range s.audioDevices {
@@ -315,6 +316,7 @@ func (s *SettingsDialog) createPlaybackTab() *container.TabItem {
 	audioExclusive.Checked = s.config.LocalPlayback.AudioExclusive
 
 	return container.NewTabItem("Playback", container.NewVBox(
+		container.NewHBox(disableTranscode),
 		container.New(&layouts.MaxPadLayout{PadTop: 5},
 			container.New(layout.NewFormLayout(),
 				widget.NewLabel("Audio device"), container.NewBorder(nil, nil, nil, util.NewHSpace(70), deviceSelect),