sound and brightenss

Menu/GameShell/10_Settings/Sound/volume_unix.go

@@ -0,0 +1,68 @@
+// +build !windows
+/*
+ * Copied from https://github.com/itchyny/volume-go,  MIT License
+ */
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func execCmd(cmdArgs []string) ([]byte, error) {
+	cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
+	cmd.Env = append(os.Environ(), cmdEnv()...)
+	out, err := cmd.Output()
+	if err != nil {
+		err = fmt.Errorf(`failed to execute "%v" (%+v)`, strings.Join(cmdArgs, " "), err)
+	}
+	return out, err
+}
+
+// GetVolume returns the current volume (0 to 100).
+func GetVolume() (int, error) {
+	out, err := execCmd(getVolumeCmd())
+	if err != nil {
+		return 0, err
+	}
+	return parseVolume(string(out))
+}
+
+// SetVolume sets the sound volume to the specified value.
+func SetVolume(volume int) error {
+	if volume < 0 || 100 < volume {
+		return errors.New("out of valid volume range")
+	}
+	_, err := execCmd(setVolumeCmd(volume))
+	return err
+}
+
+// IncreaseVolume increases (or decreases) the audio volume by the specified value.
+func IncreaseVolume(diff int) error {
+	_, err := execCmd(increaseVolumeCmd(diff))
+	return err
+}
+
+// GetMuted returns the current muted status.
+func GetMuted() (bool, error) {
+	out, err := execCmd(getMutedCmd())
+	if err != nil {
+		return false, err
+	}
+	return parseMuted(string(out))
+}
+
+// Mute mutes the audio.
+func Mute() error {
+	_, err := execCmd(muteCmd())
+	return err
+}
+
+// Unmute unmutes the audio.
+func Unmute() error {
+	_, err := execCmd(unmuteCmd())
+	return err
+}