/// <summary>
/// The Initialize Audio Client
/// </summary>
/// <param name="audioFlow"></param>
/// <param name="_deviceEnumerator"></param>
private void InitializeAudioClient()
{
//Get Audio Client from device
COMResult result = _audioDevice.Activate(typeof(IAudioClient).GUID, 0, IntPtr.Zero, out object obj);
_audioClient = (IAudioClient)obj;
//Get Audio Meter from device
result = _audioDevice.Activate(typeof(IAudioMeterInformation).GUID, 0, IntPtr.Zero, out obj);
_audioMeter = (IAudioMeterInformation)obj;
//Get Audio End Point
result = _audioDevice.Activate(typeof(IAudioEndpointVolume).GUID, 0, IntPtr.Zero, out obj);
_audioEndpointVolume = (IAudioEndpointVolume)obj;
_audioEndpointVolume.RegisterControlChangeNotify(classCallBack);
//Initialize Audio Client.
_sessionGuid = new Guid();
result = _audioClient.GetMixFormat(out waveFormat);
AudioClientStreamFlags streamFlag = AudioClientStreamFlags.None;
if (_audioDataFlow == AudioDataFlow.eRender)
{
streamFlag = AudioClientStreamFlags.Loopback;
}
result = _audioClient.Initialize(AudioClientMode.Shared, streamFlag, 10000000, 0, waveFormat, ref _sessionGuid);
result = _audioClient.Start();
//Change wave format here
SetupWaveFormat(waveFormat);
result = _audioEndpointVolume.GetChannelCount(out _channelCount);
}
private void InitializeAudio(AudioDataFlow audioFlow, IMMDeviceEnumerator deviceEnumerator)
{
//Get Audio Device
COMResult result = deviceEnumerator.GetDefaultAudioEndpoint(audioFlow, EndPointRole.eMultimedia, out _audioDevice);
//Register End point notification
_notifyClient = new MMNotificationClient();
result = deviceEnumerator.RegisterEndpointNotificationCallback(_notifyClient);
//Get Audio Client from device
result = _audioDevice.Activate(typeof(IAudioClient).GUID, 0, IntPtr.Zero, out object obj);
_audioClient = (IAudioClient)obj;
//Get Audio Meter from device
result = _audioDevice.Activate(typeof(IAudioMeterInformation).GUID, 0, IntPtr.Zero, out obj);
_audioMeter = (IAudioMeterInformation)obj;
//Initialize Audio Client.
_sessionGuid = new Guid();
result = _audioClient.GetMixFormat(out waveFormat);
AudioClientStreamFlags streamFlag = AudioClientStreamFlags.None;
if (audioFlow == AudioDataFlow.eRender)
{
streamFlag = AudioClientStreamFlags.Loopback;
}
result = _audioClient.Initialize(AudioClientMode.Shared, streamFlag, 10000000, 0, waveFormat, ref _sessionGuid);
//Get Capture Client.
result = _audioClient.GetService(typeof(IAudioCaptureClient).GUID, out obj);
Marshal.ThrowExceptionForHR((int)result);
_audioCaptureClient = (IAudioCaptureClient)obj;
result = _audioClient.Start();
//Change wave format here
SetupWaveFormat(waveFormat);
}
/// <summary>
/// Initialize the Audio Client
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="streamFlags">Stream Flags</param>
/// <param name="bufferDuration">Buffer Duration</param>
/// <param name="periodicity">Periodicity</param>
/// <param name="waveFormat">Wave Format</param>
/// <param name="audioSessionGuid">Audio Session GUID (can be null)</param>
public void Initialize(AudioClientShareMode shareMode,
AudioClientStreamFlags streamFlags,
long bufferDuration,
long periodicity,
WaveFormat waveFormat,
Guid audioSessionGuid)
{
audioClientInterface.Initialize(shareMode, streamFlags, bufferDuration, periodicity, waveFormat, ref audioSessionGuid);
// may have changed the mix format so reset it
mixFormat = null;
}
/// <summary>
/// Initializes the Audio Client
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="streamFlags">Stream Flags</param>
/// <param name="bufferDuration">Buffer Duration</param>
/// <param name="periodicity">Periodicity</param>
/// <param name="waveFormat">Wave Format</param>
/// <param name="audioSessionGuid">Audio Session GUID (can be null)</param>
public void Initialize(AudioClientShareMode shareMode,
AudioClientStreamFlags streamFlags,
long bufferDuration,
long periodicity,
WaveFormatProvider waveFormat,
Guid audioSessionGuid)
{
int hresult = audioClientInterface.Initialize(shareMode, streamFlags, bufferDuration, periodicity, waveFormat, ref audioSessionGuid);
Marshal.ThrowExceptionForHR(hresult);
// may have changed the mix format so reset it
mixFormat = null;
}
/// <summary>
/// Initializes the Audio Client
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="streamFlags">Stream Flags</param>
/// <param name="bufferDuration">Buffer Duration</param>
/// <param name="periodicity">Periodicity</param>
/// <param name="waveFormat">Wave Format</param>
/// <param name="audioSessionGuid">Audio Session GUID (can be null)</param>
public int Initialize(ShareMode shareMode,
StreamFlags streamFlags,
long bufferDuration,
long periodicity,
WaveFormat waveFormat,
Guid audioSessionGuid)
{
this.shareMode = shareMode;
int hret = audioClientInterface.Initialize(shareMode, streamFlags, bufferDuration, periodicity, waveFormat, ref audioSessionGuid);
mixFormat = null;
return(hret);
}
public void Initialize(EAudioClientShareMode shareMode,
EAudioClientStreamFlags streamFlags,
long bufferDuration,
long periodicity,
WaveFormat format,
Guid audioSessionGuid)
{
var hresult = _realAudioClient.Initialize(shareMode, streamFlags, bufferDuration, periodicity, format, ref audioSessionGuid);
Marshal.ThrowExceptionForHR(hresult);
// may have changed the mix format so reset it
mixFormat = null;
}
/// <summary>
/// Initialize the Audio Client
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="streamFlags">Stream Flags</param>
/// <param name="bufferDuration">Buffer Duration</param>
/// <param name="periodicity">Periodicity</param>
/// <param name="waveFormat">Wave Format</param>
/// <param name="audioSessionGuid">Audio Session GUID (can be null)</param>
public int Initialize(AudioClientShareMode shareMode,
AudioClientStreamFlags streamFlags,
long bufferDuration,
long periodicity,
ref WaveFormatExtensible waveFormat,
Guid audioSessionGuid)
{
int hresult = 0;
hresult = audioClientInterface.Initialize(shareMode, streamFlags, bufferDuration, periodicity, ref waveFormat, ref audioSessionGuid);
if (hresult != 0)
{
this.EventWriterDLL.WriteLine(EventWriterDLL.SeverityTypes.Error, 0x01, "Error Code in AudioClient::Initialize: " + hresult);
}
// may have changed the mix format so reset it
mixFormat = new WaveFormatExtensible();
return(hresult);
}
private void StartSilenceGeneration()
{
IntPtr mixFormatPtr = IntPtr.Zero;
try
{
Checked(_endpoint.Activate(ref IAudioClientId, ClsCtxEnum.All, IntPtr.Zero, out var obj), "Silence.Activate");
_audioClientForRendering = (IAudioClient)obj;
Checked(_audioClientForRendering.GetMixFormat(out mixFormatPtr), "Silence.GetMixFormat");
WaveFormatEx format = (WaveFormatEx)Marshal.PtrToStructure(mixFormatPtr, typeof(WaveFormatEx));
CheckFormat(format);
Checked(_audioClientForRendering.Initialize(AudioClientShareModeEnum.Shared, AudioClientStreamFlagsEnum.None, 10_000_000 * 5, 0, mixFormatPtr, Guid.Empty), "Silence.Initialize");
Checked(_audioClientForRendering.GetBufferSize(out var bufferSize), "Silence.GetBufferSize");
Checked(_audioClientForRendering.GetService(IAudioRenderClientId, out var renderObj), "Silence.GetService");
_audioRenderClient = (IAudioRenderClient)renderObj;
Checked(_audioClientForRendering.Start(), "Silence.Start");
_silenceThread = new Thread(() => SilenceGenerationRoutine(bufferSize, format));
_silenceThread.Name = "Silence generator";
_silenceThread.Start();
}
catch (Exception e)
{
ReleaseComObject(ref _audioClientForRendering);
ReleaseComObject(ref _audioRenderClient);
Core.LogError(e, "Faied to StartSilenceGeneration");
}
finally
{
if (mixFormatPtr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(mixFormatPtr);
}
}
}
public void Initialize(
AudioClientShareMode shareMode,
AudioClientStreamFlags streamFlags,
long bufferDuration, long periodicity,
WAVEFORMATEXTENSIBLE format, Guid audioSessionGuid)
{
int hr = _RealClient.Initialize(shareMode, streamFlags, bufferDuration, periodicity, format, ref audioSessionGuid);
Marshal.ThrowExceptionForHR(hr);
if ((streamFlags & AudioClientStreamFlags.EventCallback) != 0)
{
_audioSampleReady = new AutoResetEvent(false);
IntPtr eventHandle = CreateEventEx(IntPtr.Zero, "audioSampleReady", CreateEventFlags.None, AccessRight.Synchronize | AccessRight.EventModifyState);
_audioSampleReady.SafeWaitHandle = new Microsoft.Win32.SafeHandles.SafeWaitHandle(eventHandle, true);
hr = _RealClient.SetEventHandle(eventHandle);
Marshal.ThrowExceptionForHR(hr);
_audioSampleReadyRegistered = ThreadPool.RegisterWaitForSingleObject(
_audioSampleReady, new WaitOrTimerCallback(sampleReady), null, -1, false);
}
_isInitialized = true;
}
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;
}
}
internal static unsafe Factory_WindowsCoreApi.IAudioClient CreateClient(IMMDevice IDevice, out WAVEFORMATEX format, out Type dataFormat)
{
Factory_WindowsCoreApi.IAudioClient IAudioClient;
IDevice.Activate(Factory_WindowsCoreApi.IID_IAudioClient, (uint)PlaybackClient_WindowsCoreApi.CLSCTX.CLSCTX_ALL, new IntPtr(0), out IAudioClient);
IntPtr rawFormatPtr = new IntPtr();
IAudioClient.GetMixFormat(out rawFormatPtr);
WAVEFORMATEX *pFormat = (WAVEFORMATEX *)rawFormatPtr.ToPointer();
if (pFormat->wBitsPerSample % 8 != 0)
{
throw new Exception("Unsupported bits per sample value");
}
dataFormat = typeof(byte);
if (pFormat->wFormatTag == 0xFFFE)
{
WAVEFORMATEXTENSIBLE *pFormatEx = (WAVEFORMATEXTENSIBLE *)pFormat;
if (pFormatEx->SubFormat == FormatEx_IEEE)
{
switch (pFormat->wBitsPerSample)
{
case 0:
case 32: dataFormat = typeof(float); break;
case 64: dataFormat = typeof(double); break;
default: throw new Exception("Unsupported underlying data format");
}
}
else if (pFormatEx->SubFormat == FormatEx_PCM)
{
switch (pFormat->wBitsPerSample)
{
case 8: dataFormat = typeof(byte); break;
case 16: dataFormat = typeof(Int16); break;
case 32: dataFormat = typeof(Int32); break;
case 64: dataFormat = typeof(Int64); break;
default: throw new Exception("Unsupported underlying data format");
}
}
}
else
{
switch ((WAVE_FORMAT)pFormat->wFormatTag)
{
case WAVE_FORMAT.PCM:
switch (pFormat->wBitsPerSample)
{
case 8: dataFormat = typeof(byte); break;
case 16: dataFormat = typeof(Int16); break;
case 32: dataFormat = typeof(Int32); break;
case 64: dataFormat = typeof(Int64); break;
default: throw new Exception("Unsupported underlying data format");
}
break;
case WAVE_FORMAT.IEEE:
switch (pFormat->wBitsPerSample)
{
case 0:
case 32: dataFormat = typeof(float); break;
case 64: dataFormat = typeof(double); break;
default: throw new Exception("Unsupported underlying data format");
}
break;
}
}
try
{
IAudioClient.Initialize(Factory_WindowsCoreApi.AUDCLNT_SHAREMODE.AUDCLNT_SHAREMODE_SHARED, 0, 10000000, 0, new IntPtr(pFormat), Guid.Empty);
}
catch { throw new Exception("Unexpected error when creating the client"); }
format = *pFormat;
return(IAudioClient);
}
public WaveFormatEx Open()
{
StopSilenceThread();
Log.Information("Opening DesktopAudio");
IMMDeviceEnumerator deviceEnumerator = null;
IntPtr mixFormatPtr = IntPtr.Zero;
try
{
bool render = true;
deviceEnumerator = Activator.CreateInstance(typeof(MMDeviceEnumerator)) as IMMDeviceEnumerator;
var res = deviceEnumerator.GetDefaultAudioEndpoint(
render ? DataFlowEnum.Render : DataFlowEnum.Capture,
render ? RoleEnum.Console : RoleEnum.Communications,
out _endpoint);
if (render)
{
StartSilenceGeneration();
}
Checked(_endpoint.Activate(ref IAudioClientId, ClsCtxEnum.All, IntPtr.Zero, out var obj), "Activate");
_audioClient = (IAudioClient)obj;
Checked(_audioClient.GetMixFormat(out mixFormatPtr), "GetMixFormat");
WaveFormatEx outputFormat = (WaveFormatEx)Marshal.PtrToStructure(mixFormatPtr, typeof(WaveFormatEx));
if (!render) // for render it is checked in the StartSilenceGeneration();
{
CheckFormat(outputFormat);
}
_bytesPerFrame = outputFormat.BlockAlign;
var flags = AudioClientStreamFlagsEnum.StreamFlagsEventCallback | (render ? AudioClientStreamFlagsEnum.StreamFlagsLoopback : AudioClientStreamFlagsEnum.None);
Checked(_audioClient.Initialize(AudioClientShareModeEnum.Shared, flags, 10_000_000 * 5, 0, mixFormatPtr, Guid.Empty), "Initialize");
Checked(_audioClient.GetService(IAudioCaptureClientId, out var captureObj), "GetService");
_audioCaptureClient = (IAudioCaptureClient)captureObj;
#pragma warning disable CS0618 // Type or member is obsolete
Checked(_audioClient.SetEventHandle(_dataAvailable.Handle), "SetEventHandle");
#pragma warning restore CS0618 // Type or member is obsolete
Checked(_audioClient.Start(), "Start");
return(outputFormat);
}
catch (Exception e)
{
Core.LogError(e, "Open desktop audio failed");
StopSilenceThread();
ReleaseComFields();
throw;
}
finally
{
if (mixFormatPtr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(mixFormatPtr);
}
ReleaseComObject(ref deviceEnumerator);
}
}
