/// <summary>
/// Fills recording buffers.
/// </summary>
private void EnsureBuffers()
{
// We keep 3 x buffer.
lock (m_pBuffers){
while (m_pBuffers.Count < 3)
{
byte[] data = new byte[m_BufferSize];
GCHandle dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
WAVEHDR wavHeader = new WAVEHDR();
wavHeader.lpData = dataHandle.AddrOfPinnedObject();
wavHeader.dwBufferLength = (uint)data.Length;
wavHeader.dwBytesRecorded = 0;
wavHeader.dwUser = IntPtr.Zero;
wavHeader.dwFlags = 0;
wavHeader.dwLoops = 0;
wavHeader.lpNext = IntPtr.Zero;
wavHeader.reserved = 0;
GCHandle headerHandle = GCHandle.Alloc(wavHeader, GCHandleType.Pinned);
int result = 0;
result = WavMethods.waveInPrepareHeader(m_pWavDevHandle, headerHandle.AddrOfPinnedObject(), Marshal.SizeOf(wavHeader));
if (result == MMSYSERR.NOERROR)
{
m_pBuffers.Add(new BufferItem(ref headerHandle, ref dataHandle, m_BufferSize));
result = WavMethods.waveInAddBuffer(m_pWavDevHandle, headerHandle.AddrOfPinnedObject(), Marshal.SizeOf(wavHeader));
if (result != MMSYSERR.NOERROR)
{
throw new Exception("Error adding wave in buffer, error: " + result + ".");
}
}
}
}
}