/// <summary>
/// Throws a semi-descriptive exception if the input is anything besides Success
/// </summary>
public static void Check(this QCamM_Err err)
{
if (err != QCamM_Err.qerrSuccess)
{
throw new Exception("Qimaging camera error: " + err.ToString());
}
}
void queueFrameCallbackMethod(IntPtr userPtr, uint userData, QCamM_Err errcode, uint flags)
{
int state = Interlocked.CompareExchange(ref queueFrameReentranceState,
QFRS_IN_CALLBACK, QFRS_NONE);
if (state != QFRS_NONE)
{
string msg = callback_thread_msg + CheckCurrentThread() + " @start";
if (CrashIfCallbackReEntranceDetected)
{
throw new Exception(msg);
}
else
{
Trace.TraceError(msg);
}
}
else
{
CheckCurrentThread();
}
if (disposeSignal.Wait(0))
{
return;
}
queueFrameCallbackErr = unchecked ((int)errcode);
int bufferIdx = checked ((int)userData);
QCamM_Frame qCamFrame = qCamFrameBuffers[bufferIdx];
bool ok = RingBufferForOutput.TryCopyIn <QCamM_Frame, VideoFrame>(copierDelegate, qCamFrame);
if (!ok)
{
Trace.Write("!");
}
// re-insert buffer into the driver's queue
QueueFrame(bufferIdx, qCamFrame.bufferSize);
state = Interlocked.CompareExchange(ref queueFrameReentranceState,
QFRS_NONE, QFRS_IN_CALLBACK);
if (state != QFRS_IN_CALLBACK)
{
string msg = callback_thread_msg + CheckCurrentThread() + " @end";
if (CrashIfCallbackReEntranceDetected)
{
throw new Exception("QCam callback is re-entrant (end");
}
else
{
Trace.TraceError(msg);
}
}
}
void queueSettingsCallbackMethod(IntPtr userPtr, uint userData, QCamM_Err errcode, uint flags)
{
queueSettingsCallbackErr = errcode;
queueSettingsCallbackSync.Set();
}
