/// <summary>
/// Waveout thread procedure
/// </summary>
private void ThreadProc()
{
WaveOutBuffer buffer;
// create buffers
m_wave_out_buffers = new WaveOutBuffer[BufferCount];
for (int i = 0; i < BufferCount; i++)
{
m_wave_out_buffers[i] = new WaveOutBuffer(this, i);
m_wave_out_buffers[i].ClearBuffer();
}
// queue buffers
for (int i = 0; i < BufferCount; i++)
{
m_wave_out_buffers[i].Enqueue();
}
// thread loop
while (m_thread_running)
{
// wait for wave event
m_thread_event.WaitOne();
// find finished buffers and dequeue, fill and enqueue them
for (int i = 0; i < BufferCount && m_thread_running; i++)
{
buffer = m_wave_out_buffers[i];
if (buffer.Free)
{
buffer.Dequeue();
OnSampleRequest?.Invoke(buffer.Data);
buffer.Enqueue();
}
}
}
// stop wave out
WaveNative.waveOutReset(m_wave_out_device_handle);
// release buffers
for (int i = 0; i < BufferCount; i++)
{
m_wave_out_buffers[i].Dispose();
}
// close wave out
WaveNative.waveOutClose(m_wave_out_device_handle);
m_wave_out_buffers = null;
m_wave_out_device_handle = IntPtr.Zero;
m_thread = null;
m_thread_event.Dispose();
m_thread_event = null;
}
/// <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
{
}
}
/// <summary>
/// Buffer finished callback. Called by static callback.
/// </summary>
/// <param name="in_buffer"></param>
private void BufferFinished(WaveOutBuffer in_buffer)
{
m_thread_event.Set();
}