forked from moutend/go-wca
/
main.go
200 lines (173 loc) · 4.17 KB
/
main.go
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// +build windows
package main
import (
"flag"
"fmt"
"log"
"os"
"strconv"
"github.com/go-ole/go-ole"
"github.com/moutend/go-wca"
)
var version = "latest"
var revision = "latest"
type GainFlag struct {
Value float32
IsSet bool
}
func (f *GainFlag) Set(value string) (err error) {
var v float64
if v, err = strconv.ParseFloat(value, 64); err != nil {
return
}
if v > 0 {
err = fmt.Errorf("gain must be less than or equal to 0 [dB]")
}
f.Value = float32(v)
f.IsSet = true
return
}
func (f GainFlag) String() string {
return fmt.Sprintf("%v", f.Value)
}
type VolumeFlag struct {
Value float32
IsSet bool
}
func (f *VolumeFlag) Set(value string) (err error) {
var v float64
if v, err = strconv.ParseFloat(value, 64); err != nil {
return
}
if v > 1.0 || v < 0.0 {
err = fmt.Errorf("volume range is 0.0 to 1.0")
return
}
f.Value = float32(v)
f.IsSet = true
return
}
func (f *VolumeFlag) String() string {
return fmt.Sprintf("%v", f.Value)
}
type MuteFlag struct {
Value bool
IsSet bool
}
func (f *MuteFlag) Set(value string) (err error) {
if value != "true" && value != "false" {
err = fmt.Errorf("set 'true' or 'false'")
return
}
if value == "true" {
f.Value = true
}
f.IsSet = true
return
}
func (f *MuteFlag) String() string {
return fmt.Sprintf("%v", f.Value)
}
func main() {
var err error
if err = run(os.Args); err != nil {
log.Fatal(err)
}
return
}
func run(args []string) (err error) {
var volumeFlag VolumeFlag
var gainFlag GainFlag
var muteFlag MuteFlag
var versionFlag bool
f := flag.NewFlagSet(args[0], flag.ExitOnError)
f.Var(&volumeFlag, "volume", "Specify volume as a scalar value")
f.Var(&volumeFlag, "v", "Alias of ---volume")
f.Var(&gainFlag, "gain", "Specify volume as a gain value [dB]")
f.Var(&gainFlag, "g", "Alias of --gain")
f.Var(&muteFlag, "mute", "Specify mute state (default is false)")
f.Var(&muteFlag, "m", "Alias of --mute")
f.BoolVar(&versionFlag, "version", false, "Show version")
f.Parse(args[1:])
if versionFlag {
fmt.Printf("%s-%s\n", version, revision)
return
}
if err = endpointVolume(gainFlag, volumeFlag, muteFlag); err != nil {
return
}
fmt.Println("Successfully done")
return
}
func endpointVolume(gainFlag GainFlag, volumeFlag VolumeFlag, muteFlag MuteFlag) (err error) {
fmt.Println(volumeFlag)
if err = ole.CoInitializeEx(0, ole.COINIT_APARTMENTTHREADED); err != nil {
return
}
defer ole.CoUninitialize()
var mmde *wca.IMMDeviceEnumerator
if err = wca.CoCreateInstance(wca.CLSID_MMDeviceEnumerator, 0, wca.CLSCTX_ALL, wca.IID_IMMDeviceEnumerator, &mmde); err != nil {
return
}
defer mmde.Release()
var mmd *wca.IMMDevice
if err = mmde.GetDefaultAudioEndpoint(wca.ERender, wca.EConsole, &mmd); err != nil {
return
}
defer mmd.Release()
var ps *wca.IPropertyStore
if err = mmd.OpenPropertyStore(wca.STGM_READ, &ps); err != nil {
return
}
defer ps.Release()
var pv wca.PROPVARIANT
if err = ps.GetValue(&wca.PKEY_Device_FriendlyName, &pv); err != nil {
return
}
fmt.Printf("%s\n", pv.String())
var aev *wca.IAudioEndpointVolume
if err = mmd.Activate(wca.IID_IAudioEndpointVolume, wca.CLSCTX_ALL, nil, &aev); err != nil {
return
}
defer aev.Release()
if gainFlag.IsSet {
fmt.Println("setting gain flag")
if err = aev.SetMasterVolumeLevel(gainFlag.Value, nil); err != nil {
return
}
}
if volumeFlag.IsSet {
if err = aev.SetMasterVolumeLevelScalar(volumeFlag.Value, nil); err != nil {
return
}
}
if muteFlag.IsSet {
if err = aev.SetMute(muteFlag.Value, nil); err != nil {
return
}
}
var channels uint32
if err = aev.GetChannelCount(&channels); err != nil {
return
}
var mute bool
if err = aev.GetMute(&mute); err != nil {
return
}
var masterVolumeLevel float32
if err = aev.GetMasterVolumeLevel(&masterVolumeLevel); err != nil {
return
}
var masterVolumeLevelScalar float32
if err = aev.GetMasterVolumeLevelScalar(&masterVolumeLevelScalar); err != nil {
return
}
fmt.Println("--------")
fmt.Printf("Channels: %d\n", channels)
fmt.Printf("Mute state: %v\n", mute)
fmt.Println("Master volume level:")
fmt.Printf(" %v [dB]\n", masterVolumeLevel)
fmt.Printf(" %v [scalar]\n", masterVolumeLevelScalar)
fmt.Println("--------")
return
}