[C#] AudioEndpoint - Изменение громкости микшера Windows

Данный класс позволяет изменять ползунок громкости микшера Windows, не используя посторонних библиотек.
Работает начиная с Windows 7.

namespace VolumeMixer
{
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;

[Description("Класс для изменения микшера громкости windows")]
public class AudioEndpoint
{
[ComImport]
[Guid("BCDE0395-E52F-467C-8E3D-C4579291692E")]
internal class MMDeviceEnumerator { }

[Flags]
internal enum EDataFlow
{
eRender,
eCapture,
eAll,
EDataFlow_enum_count
}
[Flags]
internal enum ERole
{
eConsole,
eMultimedia,
eCommunications,
ERole_enum_count
}

[Guid("A95664D2-9614-4F35-A746-DE8DB63617E6"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
internal interface IMMDeviceEnumerator
{
int NotImpl1();
[PreserveSig]
int GetDefaultAudioEndpoint(EDataFlow dataFlow, ERole role, out IMMDevice ppDevice);
}

[Guid("D666063F-1587-4E43-81F1-B948E807363F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
internal interface IMMDevice
{
[PreserveSig]
int Activate(ref Guid iid, int dwClsCtx, IntPtr pActivationParams, [MarshalAs(UnmanagedType.IUnknown)] out object ppInterface);
}

[Guid("657804FA-D6AD-4496-8A60-352752AF4F89"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
internal interface IAudioEndpointVolumeCallback
{
int OnNotify(IntPtr pNotifyData);
};

[Guid("5CDF2C82-841E-4546-9722-0CF74078229A"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
internal interface IAudioEndpointVolume
{
int RegisterControlChangeNotify(IAudioEndpointVolumeCallback pNotify);
int UnregisterControlChangeNotify(IAudioEndpointVolumeCallback pNotify);
int GetChannelCount(out int pnChannelCount);
int SetMasterVolumeLevel(float fLevelDB, Guid pguidEventContext);
int SetMasterVolumeLevelScalar(float fLevel, Guid pguidEventContext);
int GetMasterVolumeLevel(out float pfLevelDB);
int GetMasterVolumeLevelScalar(out float pfLevel);
int SetChannelVolumeLevel(uint nChannel, float fLevelDB, Guid pguidEventContext);
int SetChannelVolumeLevelScalar(uint nChannel, float fLevel, Guid pguidEventContext);
int GetChannelVolumeLevel(uint nChannel, out float pfLevelDB);
int GetChannelVolumeLevelScalar(uint nChannel, out float pfLevel);
int SetMute([MarshalAs(UnmanagedType.Bool)] Boolean bMute, Guid pguidEventContext);
int GetMute(out bool pbMute);
int GetVolumeStepInfo(out uint pnStep, out uint pnStepCount);
int VolumeStepUp(Guid pguidEventContext);
int VolumeStepDown(Guid pguidEventContext);
int QueryHardwareSupport(out uint pdwHardwareSupportMask);
int GetVolumeRange(out float pflVolumeMindB, out float pflVolumeMaxdB, out float pflVolumeIncrementdB);
}

/// <summary>
/// <c>Метод для изменения громкости звука windows <br>(Работает, начиная с Windows 7)</br></c>
/// <b><br>Значение : Уровень громкости</br></b>
/// <br>(0f) : 0%</br>
/// <br>(0.10f) : 10%</br>
/// <br>(0.50f) : 50%</br>
/// <br>(0.90f) : 90%</br>
/// <br>(1f) : 100%</br>
/// <b><br>Пример использования:</br></b>
/// <br>var audio = new AudioEndpoint();</br>
/// <br>audio.Inizialize(1f);</br>
/// </summary>
/// <param name="level"></param>
public void Inizialize(float level)
{
var deviceEnumerator = (IMMDeviceEnumerator)new MMDeviceEnumerator();
IMMDevice speakers = null;
IAudioEndpointVolume vol = null;
try
{
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);
Guid IID_IAudioEndpointVolume = typeof(IAudioEndpointVolume).GUID;
speakers.Activate(ref IID_IAudioEndpointVolume, 0, IntPtr.Zero, out object o);
vol = (IAudioEndpointVolume)o;
vol.SetMasterVolumeLevelScalar(level, Guid.Empty);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
// System.IO.File.WriteAllText("VolumeError.txt", $"{ex.Message}{Environment.NewLine}");
}

if (vol != null) Marshal.ReleaseComObject(vol);
if (speakers != null) Marshal.ReleaseComObject(speakers);
if (deviceEnumerator != null) Marshal.ReleaseComObject(deviceEnumerator);
}
}
}

Код

namespace VolumeMixer

{

    using System;

    using System.ComponentModel;

    using System.Runtime.InteropServices;



    [Description("Класс для изменения микшера громкости windows")]

    public class AudioEndpoint

    {

        [ComImport]

        [Guid("BCDE0395-E52F-467C-8E3D-C4579291692E")]

        internal class MMDeviceEnumerator { }



        [Flags]

        internal enum EDataFlow

        {

            eRender,

            eCapture,

            eAll,

            EDataFlow_enum_count

        }

        [Flags]

        internal enum ERole

        {

            eConsole,

            eMultimedia,

            eCommunications,

            ERole_enum_count

        }



        [Guid("A95664D2-9614-4F35-A746-DE8DB63617E6"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

        internal interface IMMDeviceEnumerator

        {

            int NotImpl1();

            [PreserveSig]

            int GetDefaultAudioEndpoint(EDataFlow dataFlow, ERole role, out IMMDevice ppDevice);

        }



        [Guid("D666063F-1587-4E43-81F1-B948E807363F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

        internal interface IMMDevice

        {

            [PreserveSig]

            int Activate(ref Guid iid, int dwClsCtx, IntPtr pActivationParams, [MarshalAs(UnmanagedType.IUnknown)] out object ppInterface);

        }



        [Guid("657804FA-D6AD-4496-8A60-352752AF4F89"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

        internal interface IAudioEndpointVolumeCallback

        {

            int OnNotify(IntPtr pNotifyData);

        };



        [Guid("5CDF2C82-841E-4546-9722-0CF74078229A"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

        internal interface IAudioEndpointVolume

        {

            int RegisterControlChangeNotify(IAudioEndpointVolumeCallback pNotify);

            int UnregisterControlChangeNotify(IAudioEndpointVolumeCallback pNotify);

            int GetChannelCount(out int pnChannelCount);

            int SetMasterVolumeLevel(float fLevelDB, Guid pguidEventContext);

            int SetMasterVolumeLevelScalar(float fLevel, Guid pguidEventContext);

            int GetMasterVolumeLevel(out float pfLevelDB);

            int GetMasterVolumeLevelScalar(out float pfLevel);

            int SetChannelVolumeLevel(uint nChannel, float fLevelDB, Guid pguidEventContext);

            int SetChannelVolumeLevelScalar(uint nChannel, float fLevel, Guid pguidEventContext);

            int GetChannelVolumeLevel(uint nChannel, out float pfLevelDB);

            int GetChannelVolumeLevelScalar(uint nChannel, out float pfLevel);

            int SetMute([MarshalAs(UnmanagedType.Bool)] Boolean bMute, Guid pguidEventContext);

            int GetMute(out bool pbMute);

            int GetVolumeStepInfo(out uint pnStep, out uint pnStepCount);

            int VolumeStepUp(Guid pguidEventContext);

            int VolumeStepDown(Guid pguidEventContext);

            int QueryHardwareSupport(out uint pdwHardwareSupportMask);

            int GetVolumeRange(out float pflVolumeMindB, out float pflVolumeMaxdB, out float pflVolumeIncrementdB);

        }



        /// <summary>

        /// <c>Метод для изменения громкости звука windows <br>(Работает, начиная с Windows 7)</br></c>

        /// <b><br>Значение : Уровень громкости</br></b>

        /// <br>(0f) : 0%</br>

        /// <br>(0.10f) : 10%</br>

        /// <br>(0.50f) : 50%</br>

        /// <br>(0.90f) : 90%</br>

        /// <br>(1f) : 100%</br>

        /// <b><br>Пример использования:</br></b>

        /// <br>var audio = new AudioEndpoint();</br>

        /// <br>audio.Inizialize(1f);</br>

        /// </summary>

        /// <param name="level"></param>

        public void Inizialize(float level)

        {

            var deviceEnumerator = (IMMDeviceEnumerator)new MMDeviceEnumerator();

            IMMDevice speakers = null;

            IAudioEndpointVolume vol = null;

            try

            {

                deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);

                Guid IID_IAudioEndpointVolume = typeof(IAudioEndpointVolume).GUID;

                speakers.Activate(ref IID_IAudioEndpointVolume, 0, IntPtr.Zero, out object o);

                vol = (IAudioEndpointVolume)o;

                vol.SetMasterVolumeLevelScalar(level, Guid.Empty);

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.Message);

               // System.IO.File.WriteAllText("VolumeError.txt", $"{ex.Message}{Environment.NewLine}");

            }



            if (vol != null) Marshal.ReleaseComObject(vol);

            if (speakers != null) Marshal.ReleaseComObject(speakers);

            if (deviceEnumerator != null) Marshal.ReleaseComObject(deviceEnumerator);

        }

    }

}

Используется просто:

var audio = new AudioEndpoint();
audio.Inizialize(1f); // (1f) - уровень громкости

Код

var audio = new AudioEndpoint();

audio.Inizialize(1f); // (1f) - уровень громкости