private void InitializeDirectSound()
{
object lockObject = this.m_LockObject;
lock (lockObject)
{
this.directSound = null;
DirectSoundOut.DirectSoundCreate(ref this.device, out this.directSound, IntPtr.Zero);
if (this.directSound != null)
{
this.directSound.SetCooperativeLevel(DirectSoundOut.GetDesktopWindow(), DirectSoundOut.DirectSoundCooperativeLevel.DSSCL_PRIORITY);
DirectSoundOut.BufferDescription bufferDescription = new DirectSoundOut.BufferDescription();
bufferDescription.dwSize = Marshal.SizeOf(bufferDescription);
bufferDescription.dwBufferBytes = 0u;
bufferDescription.dwFlags = DirectSoundOut.DirectSoundBufferCaps.DSBCAPS_PRIMARYBUFFER;
bufferDescription.dwReserved = 0;
bufferDescription.lpwfxFormat = IntPtr.Zero;
bufferDescription.guidAlgo = Guid.Empty;
object obj;
this.directSound.CreateSoundBuffer(bufferDescription, out obj, IntPtr.Zero);
this.primarySoundBuffer = (DirectSoundOut.IDirectSoundBuffer)obj;
this.primarySoundBuffer.Play(0u, 0u, DirectSoundOut.DirectSoundPlayFlags.DSBPLAY_LOOPING);
this.samplesFrameSize = this.MsToBytes(this.desiredLatency);
DirectSoundOut.BufferDescription bufferDescription2 = new DirectSoundOut.BufferDescription();
bufferDescription2.dwSize = Marshal.SizeOf(bufferDescription2);
bufferDescription2.dwBufferBytes = (uint)(this.samplesFrameSize * 2);
bufferDescription2.dwFlags = (DirectSoundOut.DirectSoundBufferCaps.DSBCAPS_CTRLVOLUME | DirectSoundOut.DirectSoundBufferCaps.DSBCAPS_CTRLPOSITIONNOTIFY | DirectSoundOut.DirectSoundBufferCaps.DSBCAPS_STICKYFOCUS | DirectSoundOut.DirectSoundBufferCaps.DSBCAPS_GLOBALFOCUS | DirectSoundOut.DirectSoundBufferCaps.DSBCAPS_GETCURRENTPOSITION2);
bufferDescription2.dwReserved = 0;
GCHandle gCHandle = GCHandle.Alloc(this.waveFormat, GCHandleType.Pinned);
bufferDescription2.lpwfxFormat = gCHandle.AddrOfPinnedObject();
bufferDescription2.guidAlgo = Guid.Empty;
this.directSound.CreateSoundBuffer(bufferDescription2, out obj, IntPtr.Zero);
this.secondaryBuffer = (DirectSoundOut.IDirectSoundBuffer)obj;
gCHandle.Free();
DirectSoundOut.BufferCaps bufferCaps = new DirectSoundOut.BufferCaps();
bufferCaps.dwSize = Marshal.SizeOf(bufferCaps);
this.secondaryBuffer.GetCaps(bufferCaps);
this.nextSamplesWriteIndex = 0;
this.samplesTotalSize = bufferCaps.dwBufferBytes;
this.samples = new byte[this.samplesTotalSize];
DirectSoundOut.IDirectSoundNotify arg_26F_0 = (DirectSoundOut.IDirectSoundNotify)obj;
this.frameEventWaitHandle1 = new EventWaitHandle(false, EventResetMode.AutoReset);
this.frameEventWaitHandle2 = new EventWaitHandle(false, EventResetMode.AutoReset);
this.endEventWaitHandle = new EventWaitHandle(false, EventResetMode.AutoReset);
DirectSoundOut.DirectSoundBufferPositionNotify[] array = new DirectSoundOut.DirectSoundBufferPositionNotify[3];
array[0] = default(DirectSoundOut.DirectSoundBufferPositionNotify);
array[0].dwOffset = 0u;
array[0].hEventNotify = this.frameEventWaitHandle1.SafeWaitHandle.DangerousGetHandle();
array[1] = default(DirectSoundOut.DirectSoundBufferPositionNotify);
array[1].dwOffset = (uint)this.samplesFrameSize;
array[1].hEventNotify = this.frameEventWaitHandle2.SafeWaitHandle.DangerousGetHandle();
array[2] = default(DirectSoundOut.DirectSoundBufferPositionNotify);
array[2].dwOffset = 4294967295u;
array[2].hEventNotify = this.endEventWaitHandle.SafeWaitHandle.DangerousGetHandle();
arg_26F_0.SetNotificationPositions(3u, array);
}
}
}
private static extern void DirectSoundCreate(ref Guid GUID, [MarshalAs(UnmanagedType.Interface)] out DirectSoundOut.IDirectSound directSound, IntPtr pUnkOuter);
