New setting: Max volume

player/player.go

@@ -21,6 +21,7 @@ var CommonPlayer *Player
 type Player struct {
 	Playlist     []string
 	MaxRunTime   time.Duration
+	MaxVolume    uint16
 	Stopper      chan bool
 	currentCmd   *exec.Cmd
 	currentCmdCh chan bool
@@ -77,6 +78,7 @@ func NewPlayer(cfg *config.Config, routines []reveil.Identifier) (*Player, error
 		Stopper:       make(chan bool, 1),
 		currentCmdCh:  make(chan bool, 1),
 		MaxRunTime:    settings.MaxRunTime * time.Minute,
+		MaxVolume:     uint16(settings.MaxVolume),
 		weatherTime:   settings.WeatherDelay * time.Minute,
 		weatherAction: wact,
 		claironTime:   settings.GongInterval * time.Minute,
@@ -270,7 +272,11 @@ func (p *Player) NextTrack() {
 }
 
 func (p *Player) SetVolume(volume uint16) error {
-	cmd := exec.Command("amixer", "-D", mixerCard, "set", mixerName, fmt.Sprintf("%d", volume))
+	if p.MaxVolume == 0 {
+		p.MaxVolume = 65535
+	}
+
+	cmd := exec.Command("amixer", "-D", mixerCard, "set", mixerName, fmt.Sprintf("%d", uint32(volume)*uint32(p.MaxVolume)/65535))
 	return cmd.Run()
 }