public Bitmap GetNextFrame(out long frameId)
{
if (latestBitmap == null)
{
frameId = -1;
return(null);
}
if (!firstFrameReceived)
{
crossbarHelper.SetupTunerAndCrossbar(capBuilder, deviceFilter);
firstFrameReceived = true;
}
Bitmap rv = null;
NonBlockingLock.Lock(
NonBlockingLock.LOCK_ID_GetNextFrame,
() =>
{
rv = (Bitmap)latestBitmap.Clone();
});
frameId = frameCounter;
return(rv);
}
/// <summary> buffer callback, COULD BE FROM FOREIGN THREAD. </summary>
int ISampleGrabberCB.BufferCB(double SampleTime, IntPtr pBuffer, int BufferLen)
{
NonBlockingLock.Lock(
NonBlockingLock.LOCK_ID_BufferCB,
() =>
{
CopyBitmap(pBuffer);
frameCounter++;
});
Thread.Sleep(1);
return(0);
}
private void CloseInterfaces()
{
try
{
Thread.Sleep(50);
if (mediaCtrl != null)
{
NonBlockingLock.ExclusiveLock(
NonBlockingLock.LOCK_ID_CloseInterfaces,
() =>
{
Application.DoEvents();
// Stop the graph
int hr = mediaCtrl.Stop();
DsError.ThrowExceptionForHR(hr);
});
mediaCtrl = null;
isRunning = false;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
if (filterGraph != null)
{
Marshal.ReleaseComObject(filterGraph);
filterGraph = null;
}
if (deviceFilter != null)
{
Marshal.ReleaseComObject(deviceFilter);
deviceFilter = null;
}
}