1using System;
 2using System.Runtime.InteropServices;
 3
 4namespace WindowCapture.Native
 5{
 6    [StructLayout(LayoutKind.Sequential)]
 7    public struct WAVEFORMATEX
 8    {
 9        public ushort wFormatTag;
10        public ushort nChannels;
11        public uint nSamplesPerSec;
12        public uint nAvgBytesPerSec;
13        public ushort nBlockAlign;
14        public ushort wBitsPerSample;
15        public ushort cbSize;
16    }
17
18    [ComImport, Guid("A95664D2-9614-4F35-A746-DE8DB63617E6"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
19    public interface IMMDeviceEnumerator
20    {
21        void EnumAudioEndpoints(int dataFlow, int dwStateMask, [MarshalAs(UnmanagedType.IUnknown)] out object ppDevices);
22        void GetDefaultAudioEndpoint(int dataFlow, int role, out IMMDevice ppEndpoint);
23        void GetDevice([MarshalAs(UnmanagedType.LPWStr)] string pwstrId, out IMMDevice ppDevice);
24        void RegisterEndpointNotificationCallback([MarshalAs(UnmanagedType.IUnknown)] object pClient);
25        void UnregisterEndpointNotificationCallback([MarshalAs(UnmanagedType.IUnknown)] object pClient);
26    }
27
28    [ComImport, Guid("D666063F-1587-4E43-81F1-B948E807363F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
29    public interface IMMDevice
30    {
31        void Activate(ref Guid iid, int clsCtx, IntPtr pActivationParams, [MarshalAs(UnmanagedType.IUnknown)] out object ppInterface);
32        void OpenPropertyStore(int stgmAccess, [MarshalAs(UnmanagedType.IUnknown)] out object ppProperties);
33        void GetId([MarshalAs(UnmanagedType.LPWStr)] out string ppstrId);
34        void GetState(out int pdwState);
35    }
36
37    [ComImport, Guid("1CB9AD4C-DBFA-4C32-B178-C2F568A703B2"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
38    public interface IAudioClient
39    {
40        void Initialize(int ShareMode, int StreamFlags, long hnsBufferDuration, long hnsPeriodicity, IntPtr pFormat, IntPtr AudioSessionGuid);
41        void GetBufferSize(out uint pNumBufferFrames);
42        void GetStreamLatency(out long phnsLatency);
43        void GetCurrentPadding(out uint pNumPaddingFrames);
44        void IsFormatSupported(int ShareMode, ref WAVEFORMATEX pFormat, out IntPtr ppClosestMatch);
45        void GetMixFormat(out IntPtr ppDeviceFormat);
46        void GetDevicePeriod(out long phnsDefaultDevicePeriod, out long phnsMinimumDevicePeriod);
47        void Start();
48        void Stop();
49        void Reset();
50        void SetEventHandle(IntPtr eventHandle);
51        void GetService(ref Guid riid, [MarshalAs(UnmanagedType.IUnknown)] out object ppv);
52    }
53
54    [ComImport, Guid("C8ADBD64-E71E-48A0-A4DE-185C395CD317"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
55    public interface IAudioCaptureClient
56    {
57        void GetBuffer(out IntPtr ppData, out uint pNumFramesAvailable, out uint pdwFlags, out ulong pu64DevicePosition, out ulong pu64QPCPosition);
58        void ReleaseBuffer(uint NumFramesRead);
59        void GetNextPacketSize(out uint pNumFramesInNextPacket);
60    }
61
62    [ComImport, Guid("F294ACFC-3146-4483-A7BF-ADDCA7C260E2"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
63    public interface IAudioRenderClient
64    {
65        void GetBuffer(uint NumFramesRequested, out IntPtr ppData);
66        void ReleaseBuffer(uint NumFramesWritten, uint dwFlags);
67    }
68
69    [ComImport, Guid("87CE5498-68D6-44E5-9215-6DA47EF883D8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
70    public interface ISimpleAudioVolume
71    {
72        void SetMasterVolume(float fLevel, ref Guid EventContext);
73        void GetMasterVolume(out float pfLevel);
74        void SetMute([MarshalAs(UnmanagedType.Bool)] bool bMute, ref Guid EventContext);
75        void GetMute([MarshalAs(UnmanagedType.Bool)] out bool pbMute);
76    }
77}