/// <summary>
/// Called when camera is disconnected from PC.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void CameraLost(object sender, ICImagingControl.DeviceLostEventArgs e)
{
try
{
cam.LiveStop();
}
catch (Exception inner)
{
string errMsg = "Camera.CameraLost : Attempted to execute LiveStop after losing camera, exception thrown.";
CameraException ex = new CameraException(errMsg, inner);
log.Error(ex);
}
isRunning = false;
cam.ImageAvailable -= new EventHandler <ICImagingControl.ImageAvailableEventArgs>(ImageAvailable);
cam.DeviceLost -= new EventHandler <ICImagingControl.DeviceLostEventArgs>(CameraLost);
// generate exception to pass to any subscribers of the ThreadError event
string errMsg2 = "Camera.CameraLost : Camera disconnected from system.";
CameraException ex2 = new CameraException(errMsg2);
ThreadErrorEventArgs er = new ThreadErrorEventArgs(errMsg2, ex2, true);
ThreadErrorEventArgs.OnThreadError(this, ThreadError, er);
}
private void Process()
{
// get a local copy of metadata singleton
MetaData metadata = MetaData.Instance;
// location of folders in saving directory structure
string rootLocation = metadata.SaveLocation;
string cam1TestLocation = "";
string cam2TestLocation = "";
string cam1DebugLocation = "";
string cam2DebugLocation = "";
// list to keep image data in
IPData[] cam1History = new IPData[DEFAULT_TEST_HISTORY_SIZE];
IPData[] cam2History = new IPData[DEFAULT_TEST_HISTORY_SIZE];
int cam1HistoryInsertIndex = 0;
int cam2HistoryInsertIndex = 0;
// tracks consecutive cracks in data and a flag to confirm a crack
int cam1ConsecutiveCrackedSampleCount = 0;
int cam2ConsecutiveCrackedSampleCount = 0;
bool crackConfirmed = false;
// timers for throttling thread, and updating save requests
Stopwatch _threadTimer = new Stopwatch();
Stopwatch _debugSaveUpdateTimer = new Stopwatch();
Stopwatch _testSaveUpdateTimer = new Stopwatch();
// flags to reset when timers trigger indicating corresponding data needs to be updated
bool updateCam1DebugData = true;
bool updateCam2DebugData = true;
bool updateCam1TestData = true;
bool updateCam2TestData = true;
// attempt to create root directory and unique identify folder
try
{
// updates the rootLocation to include the unique identifier folder generated inside function call
rootLocation = initRootDirectory(rootLocation);
}
catch (Exception inner)
{
string errMsg = "ImageHistoryBuffer.Process : Unable to create root directory and unique identifier folder.";
ImageHistoryBufferException ex = new ImageHistoryBufferException(errMsg, inner);
log.Error(errMsg, ex);
// shutdown thread here
ThreadErrorEventArgs er = new ThreadErrorEventArgs(errMsg, ex, true);
ThreadErrorEventArgs.OnThreadError(this, ThreadError, er);
}
// attempt to create directory structure for test data
try
{
initTestDirectory(rootLocation, ref cam1TestLocation, ref cam2TestLocation);
}
catch (Exception inner)
{
string errMsg = "ImageHistoryBuffer.Process : Unable to create directory structure for test data.";
ImageHistoryBufferException ex = new ImageHistoryBufferException(errMsg, inner);
log.Error(errMsg, ex);
// shutdown thread here
ThreadErrorEventArgs er = new ThreadErrorEventArgs(errMsg, ex, true);
ThreadErrorEventArgs.OnThreadError(this, ThreadError, er);
}
// attempt to create directory structure for debug saving if enabled
if (metadata.EnableDebugSaving)
{
try
{
initDebugDirectory(rootLocation, ref cam1DebugLocation, ref cam2DebugLocation);
}
catch (Exception inner)
{
string errMsg = "ImageHistoryBuffer.Process : Unable to create directory structure for debug saving.";
ImageHistoryBufferException ex = new ImageHistoryBufferException(errMsg, inner);
log.Error(errMsg, ex);
// shutdown thread here
ThreadErrorEventArgs er = new ThreadErrorEventArgs(errMsg, ex, true);
ThreadErrorEventArgs.OnThreadError(this, ThreadError, er);
}
}
// start threading timers
_threadTimer.Start();
_debugSaveUpdateTimer.Start();
_testSaveUpdateTimer.Start();
while (isRunning)
{
// throttles the thread to prevent it from consuming 100% of processor it is running on
int timeToSleep = threadThrottlePeriod - Convert.ToInt32(_threadTimer.ElapsedMilliseconds);
if (timeToSleep > 0)
{
Thread.Sleep(timeToSleep);
}
_threadTimer.Restart();
// check if debug data needs to be updated
if (_debugSaveUpdateTimer.ElapsedMilliseconds >= metadata.DebugSaveFrequency * 1000)
{
updateCam1DebugData = true;
updateCam2DebugData = true;
_debugSaveUpdateTimer.Restart();
}
// check to see if test data needs to be updated
if (_testSaveUpdateTimer.ElapsedMilliseconds >= 250)
{
updateCam1TestData = true;
updateCam2TestData = true;
_testSaveUpdateTimer.Restart();
}
// pop everything off of savequeue
List <QueueElement> imageElements = new List <QueueElement>();
consumerQueue.popAll(ref imageElements);
if (imageElements.Count > 0)
{
for (int i = 0; i < imageElements.Count; i++)
{
//figure our where the iamge is coming from
IPData data = (IPData)imageElements[i].Data;
string type = imageElements[i].Type;
if (type.Contains("1"))
{
// see if image needs to be stored in recent history buffer 1
if (updateCam1TestData)
{
// requires a slot in buffer
cam1History[cam1HistoryInsertIndex] = data;
cam1HistoryInsertIndex = (cam1HistoryInsertIndex + 1) % DEFAULT_TEST_HISTORY_SIZE;
updateCam1TestData = false;
}
if (metadata.EnableDebugSaving)
{
if (updateCam1DebugData)
{
// need to save image to debug slot
SaveIPData(cam1DebugLocation, ref data);
updateCam1DebugData = false;
}
}
if (data.ContainsCrack)
{
cam1ConsecutiveCrackedSampleCount++;
if (cam1ConsecutiveCrackedSampleCount > CONSECUTIVE_CRACKS)
{
crackConfirmed = true;
}
}
else
{
cam1ConsecutiveCrackedSampleCount = 0;
crackConfirmed = false;
}
}
else if (type.Contains("2"))
{
// see if image needs to be stored in recent history buffer 2
if (updateCam2TestData)
{
// requires a slot in buffer
cam2History[cam2HistoryInsertIndex] = data;
cam2HistoryInsertIndex = (cam2HistoryInsertIndex + 1) % DEFAULT_TEST_HISTORY_SIZE;
updateCam2TestData = false;
}
if (metadata.EnableDebugSaving)
{
if (updateCam2DebugData)
{
// need to save image to debug slot
SaveIPData(cam2DebugLocation, ref data);
updateCam2DebugData = false;
}
}
if (data.ContainsCrack)
{
cam2ConsecutiveCrackedSampleCount++;
if (cam2ConsecutiveCrackedSampleCount > CONSECUTIVE_CRACKS)
{
crackConfirmed = true;
}
}
else
{
cam2ConsecutiveCrackedSampleCount = 0;
crackConfirmed = false;
}
}
else
{
// unknown data type
log.Info("ImageHistoryBuffer.Process : Received unknown data type.");
}
// check to see if we have confirmed a crack existing
if (crackConfirmed)
{
// trigger the USB Relay
USBRelayController usb_relay = USBRelayController.Instance;
if (usb_relay.IsOpen)
{
usb_relay.SetRelay0Status(true);
usb_relay.SetRelay1Status(true);
}
// save all images in history buffer
saveHistoryBuffer(cam1TestLocation, cam1History);
saveHistoryBuffer(cam2TestLocation, cam2History);
break;
}
}
}
}
return;
}