//called when data for any output pin is requested
public async void Evaluate(int SpreadMax)
{
switch (FCaptureState)
{
case CaptureState.Idle:
{
if (FRecord[0])
{
if (FFrameCount[0] < 0 || (FFrameCount[0] > 0 && FRecord.IsChanged))
{
int p = unchecked ((int)FInput[0]);
FHandleToCapture = new IntPtr(p);
if (FHandleToCapture != IntPtr.Zero)
{
FCaptureState = CaptureState.Capturing;
FFramesToCapture = FFrameCount[0];
FDelayTimeToCapture = FDelay[0];
FIsRecording[0] = true;
FCurrentTime = FHDEHost.FrameTime;
//initialize TimeProvider
FHDEHost.SetFrameTimeProvider(_ => FCurrentTime);
}
}
}
break;
}
case CaptureState.Capturing:
{
if (FFramesToCapture < 0)
{
//write file when capture stops
if (!FRecord[0])
{
FCaptureState = CaptureState.Writing;
}
}
else if (FFrames.Count >= FFramesToCapture)
{
FCaptureState = CaptureState.Writing;
}
break;
}
}
if (FCaptureState == CaptureState.Capturing)
{
try
{
var img = FScreenCapture.CaptureWindow(FHandleToCapture, true, null, FShowCursor[0]);
var delay = FHDEHost.FrameTime - FLastFrameTime;
FFrames.Add(new Frame()
{
Image = img, Delay = (float)delay
});
//advance frame time (will be taken into account for next frame captured)
FCurrentTime += FDelayTimeToCapture;
}
catch (Exception e)
{
//in case of exception assume out of memory (even if no OOM exception occurs)
//free some memory by removing the last recorded frames for Saving not to fail
var freeCount = Math.Min(FFrames.Count, 10);
for (int i = FFrames.Count - freeCount; i < FFrames.Count; i++)
{
FFrames[i].Image.Dispose();
}
FFrames = FFrames.SkipLast(freeCount).ToList();
//then try saving the captured stuff
if (FFrames.Count > 0)
{
FCaptureState = CaptureState.Writing;
}
else
{
FCaptureState = CaptureState.Idle;
}
}
}
else if (FCaptureState == CaptureState.Writing)
{
if (!FIsWriting[0])
{
//reset TimeProvider
FHDEHost.SetFrameTimeProvider((ITimeProvider)null);
//compute filename
FCurrentFilename = FFilename[0];
if (FAutoFilename[0])
{
FCurrentFilename += Path.HasExtension(FCurrentFilename) ? "" : "\\"; //add trailing slash if this is supposed to be a path
var path = Path.GetDirectoryName(FCurrentFilename);
FCurrentFilename = Path.GetFileNameWithoutExtension(FCurrentFilename);
var now = DateTime.Now;
FCurrentFilename += "_" + now.ToString("dd.MM.yyyy-HH.mm.ss");
FCurrentFilename = Path.Combine(path, FCurrentFilename + ".gif");
//FLogger.Log(LogType.Debug, filename);
}
FIsRecording[0] = false;
FIsWriting[0] = true;
//write the file
await Task.Run(() => SaveGIFAsync(FCurrentFilename));
FLastFile[0] = FCurrentFilename;
FIsWriting[0] = false;
FCaptureState = CaptureState.Idle;
FProgressBar.Hide();
}
}
if (FReportProgress[0])
{
ReportProgress();
}
FLastFrameTime = FHDEHost.FrameTime;
FFrameCountOut[0] = FFrames.Count;
}
