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;
}
/// <summary>
/// Set the Event Handle for buffer synchro.
/// </summary>
/// <param name="eventWaitHandle">The Wait Handle to setup</param>
public void SetEventHandle(IntPtr eventWaitHandle)
{
audioClientInterface.SetEventHandle(eventWaitHandle);
}
/// <summary>
/// Set the Event Handle for buffer synchro.
/// </summary>
/// <param name="eventWaitHandle">The Wait Handle to setup</param>
public void SetEventHandle(EventWaitHandle eventWaitHandle)
{
_realAudioClient.SetEventHandle(eventWaitHandle.SafeWaitHandle.DangerousGetHandle());
}
/// <summary>
/// Set the Event Handle for buffer synchro.
/// </summary>
/// <param name="eventWaitHandle">The Wait Handle to setup</param>
public void SetEventHandle(EventWaitHandle eventWaitHandle)
{
audioClientInterface.SetEventHandle(eventWaitHandle.SafeWaitHandle.DangerousGetHandle());
}
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);
}
}
