private int WriteWaveOut(IntPtr buf, int size)
{
int ret;
WaveNative.WaveHdr m_Header = new WaveNative.WaveHdr(); ;
GCHandle m_HeaderHandle = GCHandle.Alloc(m_Header, GCHandleType.Pinned);
m_Header.dwUser = (IntPtr)GCHandle.Alloc(this);
m_Header.lpData = buf;
m_Header.dwBufferLength = size;
ret = WaveNative.waveOutPrepareHeader(waveOut, ref m_Header, Marshal.SizeOf(m_Header));
if (ret != WaveNative.MMSYSERR_NOERROR)
throw new Exception("can not open wave device");
lock (queue)
{
ret = WaveNative.waveOutWrite(waveOut, ref m_Header, Marshal.SizeOf(m_Header));
}
if (ret != WaveNative.MMSYSERR_NOERROR)
throw new Exception("can not open wave device");
while (WaveNative.waveOutUnprepareHeader(waveOut, ref m_Header, Marshal.SizeOf(m_Header)) == WaveNative.WAVERR_STILLPLAYING)
{
Thread.Sleep(5);
}
((GCHandle)m_Header.dwUser).Free();
m_HeaderHandle.Free();
return ret;
}
internal static void WaveInProc(IntPtr hdrvr, int uMsg, int dwUser, ref WaveNative.WaveHdr wavhdr, int dwParam2)
{
if (uMsg == WaveNative.MM_WIM_DATA)
{
GCHandle h = (GCHandle)wavhdr.dwUser;
WaveInBuffer buf = (WaveInBuffer)h.Target;
buf.OnCompleted();
}
}
internal static void WaveOutProc(IntPtr hdrvr, int uMsg, int dwUser, ref WaveNative.WaveHdr wavhdr, int dwParam2)
{
if (uMsg == WaveNative.MM_WOM_DONE)
{
try
{
GCHandle h = (GCHandle)wavhdr.dwUser;
WaveOutBuffer buf = (WaveOutBuffer)h.Target;
buf.OnCompleted();
}
catch
{
}
}
}
internal static void WaveOutProc(
IntPtr hdrvr,
int uMsg,
int dwUser,
ref WaveNative.WaveHdr wavhdr,
int dwParam2)
{
if (uMsg != 957)
{
return;
}
try
{
((WaveOutBuffer)((GCHandle)wavhdr.dwUser).Target).OnCompleted();
}
catch
{
}
}
public static extern int waveOutWrite(
IntPtr hWaveOut,
ref WaveNative.WaveHdr lpWaveOutHdr,
int uSize);
public static extern int waveOutUnprepareHeader(
IntPtr hWaveOut,
ref WaveNative.WaveHdr lpWaveOutHdr,
int uSize);
