public void GetDevicePeriod(out long DefaultDevicePeriod, out long MinimumDevicePeriod)
{
long r1; long r2;
Marshal.ThrowExceptionForHR(_RealClient.GetDevicePeriod(out r1, out r2));
DefaultDevicePeriod = r1;
MinimumDevicePeriod = r2;
}
public DevicePeriod GetDevicePeriod()
{
long def;
long min;
int result = (_audioClient.GetDevicePeriod(out def, out min));
Console.WriteLine(result);
return(new DevicePeriod(def, min));
}
public CoreAudio(bool microphone = false)
{
const uint REFTIMES_PER_SEC = 10000000;
const uint CLSCTX_INPROC_SERVER = 1;
Guid clsid = new Guid("BCDE0395-E52F-467C-8E3D-C4579291692E");
Guid IID_IUnknown = new Guid("00000000-0000-0000-C000-000000000046");
oEnumerator = null;
uint hResult = CoCreateInstance(ref clsid, null, CLSCTX_INPROC_SERVER, ref IID_IUnknown, out oEnumerator);
if (hResult != 0 || oEnumerator == null)
{
throw new Exception("CoCreateInstance() pInvoke failed");
}
iMde = oEnumerator as IMMDeviceEnumerator;
if (iMde == null)
{
throw new Exception("COM cast failed to IMMDeviceEnumerator");
}
IntPtr pDevice = IntPtr.Zero;
//iMde.EnumAudioEndpoints(EDataFlow.eCapture, DEVICE_STATE_ACTIVE,ref pDevice);
int retVal;
if (microphone)
{
retVal = iMde.GetDefaultAudioEndpoint(EDataFlow.eCapture, ERole.eConsole, ref pDevice);
}
else
{
retVal = iMde.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eConsole, ref pDevice);
}
if (retVal != 0)
{
throw new Exception("IMMDeviceEnumerator.GetDefaultAudioEndpoint()");
}
//int dwStateMask = DEVICE_STATE_ACTIVE | DEVICE_STATE_NOTPRESENT | DEVICE_STATE_UNPLUGGED;
//IntPtr pCollection = IntPtr.Zero;
//retVal = iMde.EnumAudioEndpoints(EDataFlow.eRender, dwStateMask, ref pCollection);
//if (retVal != 0)
//{
// throw new Exception("IMMDeviceEnumerator.EnumAudioEndpoints()");
//}
imd = (IMMDevice)System.Runtime.InteropServices.Marshal.GetObjectForIUnknown(pDevice);
if (imd == null)
{
throw new Exception("COM cast failed to IMMDevice");
}
Guid iid = new Guid("5CDF2C82-841E-4546-9722-0CF74078229A");
uint dwClsCtx = (uint)CLSCTX.CLSCTX_ALL;
IntPtr pActivationParams = IntPtr.Zero;
IntPtr pEndPoint = IntPtr.Zero;
retVal = imd.Activate(iid, dwClsCtx, pActivationParams, out pEndPoint);
if (retVal != 0)
{
throw new Exception("IMMDevice.Activate()");
}
iAudioEndpoint = (IAudioEndpointVolume)System.Runtime.InteropServices.Marshal.GetObjectForIUnknown(pEndPoint);
if (iAudioEndpoint == null)
{
throw new Exception("COM cast failed to IAudioEndpointVolume");
}
iid = new Guid("1CB9AD4C-DBFA-4c32-B178-C2F568A703B2");
dwClsCtx = (uint)CLSCTX.CLSCTX_ALL;
pActivationParams = IntPtr.Zero;
pEndPoint = IntPtr.Zero;
retVal = imd.Activate(iid, dwClsCtx, pActivationParams, out pEndPoint);
if (retVal != 0)
{
throw new Exception("IAudioClient.Activate() " + Convert.ToString(retVal, 2));
}
iAudioClient = (IAudioClient)System.Runtime.InteropServices.Marshal.GetObjectForIUnknown(pEndPoint);
if (iAudioClient == null)
{
throw new Exception("COM cast failed to iAudioClient");
}
ulong processInterval;
ulong minimumInterval;
retVal = iAudioClient.GetDevicePeriod(out processInterval, out minimumInterval);
if (retVal != 0)
{
throw new Exception("iAudioClient.GetDevicePeriod()");
}
waveformat = new WAVEFORMATEX();
waveformat.wFormatTag = (ushort)WaveFormatEncoding.Pcm;
waveformat.nChannels = 2;
waveformat.nBlockAlign = 4;
waveformat.wBitsPerSample = 16;
waveformat.nSamplesPerSec = 44100;
waveformat.cbSize = 0;
waveformat.nAvgBytesPerSec = 176400;
IntPtr reqForm = Marshal.AllocHGlobal(Marshal.SizeOf(waveformat));
Marshal.StructureToPtr(waveformat, reqForm, false);
IntPtr propForm = Marshal.AllocHGlobal(Marshal.SizeOf(waveformat));
retVal = iAudioClient.IsFormatSupported(AUDCLNT_SHAREMODE.AUDCLNT_SHAREMODE_SHARED, reqForm, out propForm);
if (retVal != 0)
{
throw new Exception("IAudioClient.IsFormatSupported()");
}
if (microphone)
{
retVal = iAudioClient.Initialize(AUDCLNT_SHAREMODE.AUDCLNT_SHAREMODE_EXCLUSIVE, 0, 2000000, 0, reqForm, Guid.Empty);
}
else
{
retVal = iAudioClient.Initialize(AUDCLNT_SHAREMODE.AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_LOOPBACK, 2000000, 0, reqForm, Guid.Empty);
}
if (retVal != 0)
{
throw new Exception("IAudioClient.Initialize() " + retVal);
}
uint buffersize = 0;
retVal = iAudioClient.GetBufferSize(out buffersize);
if (retVal != 0)
{
throw new Exception("IAudioClient.GetBufferSize()");
}
iid = new Guid("C8ADBD64-E71E-48a0-A4DE-185C395CD317");
IntPtr capclient = IntPtr.Zero;
retVal = iAudioClient.GetService(iid, out capclient);
if (retVal != 0)
{
throw new Exception("IAudioClient.GetService()");
}
iAudioCaptureClient = (IAudioCaptureClient)System.Runtime.InteropServices.Marshal.GetObjectForIUnknown(capclient);
if (iAudioCaptureClient == null)
{
throw new Exception("COM cast failed to iAudioCaptureClient");
}
hnsActualDuration = (double)(REFTIMES_PER_SEC * buffersize / waveformat.nSamplesPerSec); // 8391 smallest possible value
recordingthread = new Thread(recordingloop);
recordingthread.IsBackground = false;
recordingthread.Start();
}
