private int GetBufferSize()
{
uint result;
Marshal.ThrowExceptionForHR(_realAudioClient.GetBufferSize(out result));
return((int)result);
}
internal PlaybackClient_WindowsCoreApi(IAudioClient IAudioClient, System.IO.Stream Stream, int NumChannel, int FrameSize, uint SamplesRate, Type DataFormat)
{
_IAudioClient = IAudioClient;
_IAudioClient.GetService(ref IID_IAudioRenderClient, out _IAudioRenderClient);
_IAudioClient.GetBufferSize(out _BufferFrameCount);
_Stream = Stream;
_FrameSize = FrameSize;
_BufferDuration = _BufferFrameCount / (SamplesRate / 1000);
_FullBuffer = new byte[_FrameSize * _BufferFrameCount];
_Thread = new System.Threading.Thread(Loop);
_ChannelCount = NumChannel;
_SampleRate = SamplesRate;
_Format = DataFormat;
}
private void AudioPluseMonitorWork()
{
uint bufferCount = 0;
int packageSize = -1;
int numberFramToRead = -1;
long devicePosition = 0;
long qpcPosition = 0;
AudioClientBufferFlags bufferFlag;
IntPtr packageBuffer = IntPtr.Zero;
var blockAlign = waveFormat.NBlockAlign;
var result = _audioClient.GetBufferSize(ref bufferCount);
// Calculate the actual duration of the allocated buffer.
var hnsActualDuration = (double)REFTIMES_PER_SEC *
bufferCount / waveFormat.NSamplesPerSec;
while (isAudioPluseMonitor)
{
Thread.Sleep((int)(hnsActualDuration / REFTIMES_PER_MILLISEC / 2));
result = _audioCaptureClient.GetNextPacketSize(out packageSize);
if (result == 0 && packageSize > 0)
{
while (packageSize > 0)
{
_audioCaptureClient.GetBuffer(out packageBuffer, out numberFramToRead, out bufferFlag, out devicePosition, out qpcPosition);
if (0 == numberFramToRead)
{
continue;
}
long lBytesToWrite = numberFramToRead * blockAlign;
if (AudioClientBufferFlags.Silent == bufferFlag)
{
_audiopluseCallBack(0, 0);
}
else
{
var pkgData = StructureToByteArray(packageBuffer);
ComputeDo3Band(pkgData, lBytesToWrite, waveFormat);
}
_audioCaptureClient.ReleaseBuffer(numberFramToRead);
result = _audioCaptureClient.GetNextPacketSize(out packageSize);
}
}
else
{
_audiopluseCallBack(0, 0);
}
}
}
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();
}
protected void InternalSetup(int dataFlow, int flags, int bufferSize = 0)
{
lock (mutex)
{
int hr; object obj; Guid guid;
if (endpoint == null)
{
if (enumerator == null)
{
enumerator = Activator.CreateInstance(typeof(MMDeviceEnumerator)) as IMMDeviceEnumerator;
if (enumerator == null)
{
throw new NotSupportedException();
}
}
hr = enumerator.GetDefaultAudioEndpoint((DataFlowEnum)dataFlow, RoleEnum.Multimedia, out endpoint);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if (endpoint == null)
{
throw new NotSupportedException();
}
}
if (audioClient != null)
{
Marshal.ReleaseComObject(audioClient); audioClient = null;
}
guid = IID_IAudioClient;
hr = endpoint.Activate(ref guid, ClsCtxEnum.ALL, IntPtr.Zero, out obj);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
audioClient = obj as IAudioClient;
if (audioClient == null)
{
throw new NotSupportedException();
}
IntPtr mixFormatPtr = IntPtr.Zero;
try
{
hr = audioClient.GetMixFormat(out mixFormatPtr);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
WaveFormat outputFormat = (WaveFormat)Marshal.PtrToStructure(mixFormatPtr, typeof(WaveFormat));
outputIsFloat = false;
if (outputFormat.ExtraSize >= WaveFormatEx.WaveFormatExExtraSize)
{
WaveFormatEx ex = (WaveFormatEx)Marshal.PtrToStructure(mixFormatPtr, typeof(WaveFormatEx));
if (ex.SubFormat == IeeeFloat)
{
outputIsFloat = true;
}
}
sampleRate = outputFormat.SampleRate;
channelCount = outputFormat.Channels;
bitsPerSample = outputFormat.BitsPerSample;
if (bufferSize <= 0)
{
bufferSize = 8192;
}
latencyMs = (int)(bufferSize * 500 / sampleRate);
if (latencyMs <= 0)
{
latencyMs = 1;
}
hr = audioClient.Initialize(AudioClientShareModeEnum.Shared, (AudioClientStreamFlagsEnum)flags,
latencyMs * 40000, 0, mixFormatPtr, Guid.Empty);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
finally
{
if (mixFormatPtr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(mixFormatPtr);
}
}
hr = audioClient.GetBufferSize(out outputBufferSize);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
this.bufferSize = bufferSize;
buffers = new float[channelCount][];
for (int i = 0; i < buffers.Length; i++)
{
buffers[i] = new float[bufferSize];
}
isInited = true;
}
}
