init

go.mod

@@ -0,0 +1,5 @@
+module puvol
+
+go 1.17
+
+require mrogalski.eu/go/pulseaudio v0.0.0-20200511091429-8449222912dd

go.sum

@@ -0,0 +1,2 @@
+mrogalski.eu/go/pulseaudio v0.0.0-20200511091429-8449222912dd h1:yEN6CTPZV70rUFqpZ5SqJn15JK5iKiSL4Gdw2gJ98ug=
+mrogalski.eu/go/pulseaudio v0.0.0-20200511091429-8449222912dd/go.mod h1:C3V0v+gsiHHbMtFJvwozjNVdPJZw9oUxlRTVc619wSU=

main.go

@@ -0,0 +1,107 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+
+	"mrogalski.eu/go/pulseaudio"
+)
+
+func main() {
+	flag.Parse()
+
+	c, e := pulseaudio.NewClient()
+	if e != nil {
+		log.Println(e)
+		os.Exit(1)
+	}
+
+	if os.Args[0] == "puvol-cont" {
+		cont(c)
+	} else {
+		single(c)
+	}
+}
+
+func printvol(c *pulseaudio.Client) float32 {
+	muted, e := c.Mute()
+	if muted {
+		fmt.Println("🔇")
+		return 0
+	}
+
+	v, e := c.Volume()
+	if e != nil {
+		fmt.Println(e)
+	} else {
+		fmt.Printf("%d%%\n", int(100*v))
+	}
+	return v
+}
+
+func cont(c *pulseaudio.Client) {
+
+	ch, e := c.Updates()
+	if e != nil {
+		log.Println(e)
+		os.Exit(2)
+	}
+
+	for {
+		printvol(c)
+		_ = <-ch
+	}
+}
+
+func single(c *pulseaudio.Client) {
+	if len(os.Args) == 1 {
+		printvol(c)
+		return
+	}
+
+	switch a := os.Args[1]; a {
+	case "toggle":
+		c.ToggleMute()
+		printvol(c)
+	case "mute", "unmute":
+		c.SetMute(a == "mute")
+		printvol(c)
+	case "inc", "dec":
+		v, e := c.Volume()
+		if e != nil {
+			log.Println(e)
+			os.Exit(2)
+		}
+
+		if a == "inc" {
+			v += 0.1
+		} else if a == "dec" {
+			v -= 0.1
+		}
+
+		if v <= 0 {
+			v = 0
+		}
+
+		c.SetVolume(float32(v))
+		printvol(c)
+
+	case "set":
+		if len(os.Args) < 3 {
+			log.Println("missing volume")
+			os.Exit(3)
+		}
+		v, e := strconv.ParseFloat(os.Args[2], 32)
+		if e != nil {
+			log.Println(e)
+			os.Exit(4)
+		}
+		c.SetVolume(float32(v))
+		printvol(c)
+	default:
+		printvol(c)
+	}
+}