/// <summary>
/// Waveout buffer default constructor
/// </summary>
/// <param name="in_parent">Parent Waveout class</param>
/// <param name="in_buffer_index">NUmber of the wave buffer</param>
public WaveOutBuffer(WaveOut in_parent, int in_buffer_index)
{
Parent = in_parent;
BufferIndex = in_buffer_index;
Free = true;
Header = new WaveNative.WaveHdr();
Data = new short[in_parent.BufferLength * in_parent.ChannelCount];
m_this = GCHandle.Alloc(this);
m_header_handle = GCHandle.Alloc(Header, GCHandleType.Pinned);
m_data_handle = GCHandle.Alloc(Data, GCHandleType.Pinned);
Header.lpData = m_data_handle.AddrOfPinnedObject();
Header.dwBufferLength = sizeof(short) * Data.Length;
Header.dwUser = (IntPtr)m_this;
// prepare header
WaveNative.Try(WaveNative.waveOutPrepareHeader(Parent.Handle, m_header_handle.AddrOfPinnedObject(), Marshal.SizeOf(Header)));
}
/// <summary>
/// Static callback function. Called by windows.
/// </summary>
/// <param name="hdrvr"></param>
/// <param name="uMsg"></param>
/// <param name="dwUser"></param>
/// <param name="wavhdr"></param>
/// <param name="dwParam2"></param>
internal static void WaveOutProc(IntPtr hdrvr, WaveNative.WaveMessage uMsg, int dwUser, WaveNative.WaveHdr wavhdr, int dwParam2)
{
try
{
if (uMsg == WaveNative.WaveMessage.WOM_DONE)
{
GCHandle hBuffer = (GCHandle)wavhdr.dwUser;
WaveOutBuffer buffer = (WaveOutBuffer)hBuffer.Target;
buffer.Free = true;
buffer.Parent.BufferFinished(buffer);
}
}
catch
{
}
}