add AudioExclusive mode

backend/app.go

@@ -80,7 +80,7 @@ func (a *App) readConfig() {
 
 func (a *App) initMPV() error {
 	p := player.NewWithClientName(AppName)
-	if err := p.Init(); err != nil {
+	if err := p.Init(a.Config.LocalPlayback.AudioExclusive); err != nil {
 		return fmt.Errorf("failed to initialize mpv player: %s", err.Error())
 	}
 	a.Player = p

backend/config.go

@@ -48,7 +48,8 @@ type PlaylistPageConfig struct {
 }
 
 type LocalPlaybackConfig struct {
-	Volume int
+	AudioExclusive bool
+	Volume         int
 }
 
 type Config struct {
@@ -90,7 +91,8 @@ func DefaultConfig() *Config {
 			TracklistColumns: []string{"Artist", "Album", "Time", "Plays"},
 		},
 		LocalPlayback: LocalPlaybackConfig{
-			Volume: 100,
+			AudioExclusive: false,
+			Volume:         100,
 		},
 	}
 }

player/player.go

@@ -77,7 +77,7 @@ func NewWithClientName(c string) *Player {
 
 // Initializes the Player and makes it ready for playback.
 // Most Player functions will return ErrUnitialized if called before Init.
-func (p *Player) Init() error {
+func (p *Player) Init(audioExclusive bool) error {
 	if !p.initialized {
 		m, err := CreateMPV()
 		if err != nil {
@@ -96,6 +96,10 @@ func (p *Player) Init() error {
 		}
 		m.SetOption("volume", MPVFormatInt64, p.vol)
 
+		if audioExclusive {
+			m.SetOptionString("audio-exclusive", "yes")
+		}
+
 		if p.clientName != "" {
 			m.SetOptionString("audio-client-name", p.clientName)
 		}