WindowsAudio.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
using System.Timers;
using SpotifyLib;
using System.Collections;
using System.Diagnostics;

//Windows things
namespace WindowsAudio
{

    [ComImport]
    [Guid("BCDE0395-E52F-467C-8E3D-C4579291692E")]
    internal class MMDeviceEnumerator
    {
    }

    internal enum EDataFlow
    {
        eRender,
        eCapture,
        eAll,
        EDataFlow_enum_count
    }

    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);

        // the rest is not implemented
    }

    [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);

        // the rest is not implemented
    }

    [Guid("77AA99A0-1BD6-484F-8BC7-2C654C9A9B6F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IAudioSessionManager2
    {
        int NotImpl1();
        int NotImpl2();

        [PreserveSig]
        int GetSessionEnumerator(out IAudioSessionEnumerator SessionEnum);

        // the rest is not implemented
    }

    [Guid("E2F5BB11-0570-40CA-ACDD-3AA01277DEE8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IAudioSessionEnumerator
    {
        [PreserveSig]
        int GetCount(out int SessionCount);

        [PreserveSig]
        int GetSession(int SessionCount, out IAudioSessionControl Session);
    }

    [Guid("F4B1A599-7266-4319-A8CA-E70ACB11E8CD"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IAudioSessionControl
    {
        int NotImpl1();

        [PreserveSig]
        int GetDisplayName([MarshalAs(UnmanagedType.LPWStr)] out string pRetVal);

        // the rest is not implemented
    }

    [Guid("87CE5498-68D6-44E5-9215-6DA47EF883D8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface ISimpleAudioVolume
    {
        [PreserveSig]
        int SetMasterVolume(float fLevel, ref Guid EventContext);

        [PreserveSig]
        int GetMasterVolume(out float pfLevel);

        [PreserveSig]
        int SetMute(bool bMute, ref Guid EventContext);

        [PreserveSig]
        int GetMute(out bool pbMute);
    }

    public enum AudioSessionState
    {
        AudioSessionStateInactive = 0,
        AudioSessionStateActive = 1,
        AudioSessionStateExpired = 2
    }

    public enum AudioSessionDisconnectReason
    {
        DisconnectReasonDeviceRemoval = 0,
        DisconnectReasonServerShutdown = (DisconnectReasonDeviceRemoval + 1),
        DisconnectReasonFormatChanged = (DisconnectReasonServerShutdown + 1),
        DisconnectReasonSessionLogoff = (DisconnectReasonFormatChanged + 1),
        DisconnectReasonSessionDisconnected = (DisconnectReasonSessionLogoff + 1),
        DisconnectReasonExclusiveModeOverride = (DisconnectReasonSessionDisconnected + 1)
    }

    [Guid("24918ACC-64B3-37C1-8CA9-74A66E9957A8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    public interface IAudioSessionEvents
    {
        [PreserveSig]
        int OnDisplayNameChanged([MarshalAs(UnmanagedType.LPWStr)] string NewDisplayName, Guid EventContext);
        [PreserveSig]
        int OnIconPathChanged([MarshalAs(UnmanagedType.LPWStr)] string NewIconPath, Guid EventContext);
        [PreserveSig]
        int OnSimpleVolumeChanged(float NewVolume, bool newMute, Guid EventContext);
        [PreserveSig]
        int OnChannelVolumeChanged(UInt32 ChannelCount, IntPtr NewChannelVolumeArray, UInt32 ChangedChannel, Guid EventContext);
        [PreserveSig]
        int OnGroupingParamChanged(Guid NewGroupingParam, Guid EventContext);
        [PreserveSig]
        int OnStateChanged(AudioSessionState NewState);
        [PreserveSig]
        int OnSessionDisconnected(AudioSessionDisconnectReason DisconnectReason);
    }

    [Guid("BFB7FF88-7239-4FC9-8FA2-07C950BE9C6D"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    public interface IAudioSessionControl2
    {
        [PreserveSig]
        int GetState(out AudioSessionState state);
        [PreserveSig]
        int GetDisplayName([Out(), MarshalAs(UnmanagedType.LPWStr)] out string name);
        [PreserveSig]
        int SetDisplayName([MarshalAs(UnmanagedType.LPWStr)] string value, Guid EventContext);
        [PreserveSig]
        int GetIconPath([Out(), MarshalAs(UnmanagedType.LPWStr)] out string Path);
        [PreserveSig]
        int SetIconPath([MarshalAs(UnmanagedType.LPWStr)] string Value, Guid EventContext);
        [PreserveSig]
        int GetGroupingParam(out Guid GroupingParam);
        [PreserveSig]
        int SetGroupingParam(Guid Override, Guid Eventcontext);
        [PreserveSig]
        int RegisterAudioSessionNotification(IAudioSessionEvents NewNotifications);
        [PreserveSig]
        int UnregisterAudioSessionNotification(IAudioSessionEvents NewNotifications);
        [PreserveSig]
        int GetSessionIdentifier([Out(), MarshalAs(UnmanagedType.LPWStr)] out string retVal);
        [PreserveSig]
        int GetSessionInstanceIdentifier([Out(), MarshalAs(UnmanagedType.LPWStr)] out string retVal);
        [PreserveSig]
        int GetProcessId(out UInt32 retvVal);
        [PreserveSig]
        int IsSystemSoundsSession();
        [PreserveSig]
        int SetDuckingPreference(bool optOut);
    }

    [Guid("C02216F6-8C67-4B5B-9D00-D008E73E0064"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IAudioMeterInformation
    {
        [PreserveSig]
        int GetPeakValue(out float pfPeak);
        [PreserveSig]
        int GetMeteringChannelCount(out int pnChannelCount);
        [PreserveSig]
        int GetChannelsPeakValues(int u32ChannelCount, [In]   IntPtr afPeakValues);
        [PreserveSig]
        int QueryHardwareSupport(out int pdwHardwareSupportMask);
    };


}