/// <summary>
/// Configure device and report frame format that will be used during streaming.
/// This method must return a proper ImageDescriptor so we can pre-allocate buffers.
/// </summary>
public ImageDescriptor Prepare()
{
Open();
if (device == null || featureControl == null)
{
return(ImageDescriptor.Invalid);
}
firstOpen = false;
resultingFramerate = (float)DahengHelper.GetResultingFramerate(device);
width = (int)featureControl.GetIntFeature("Width").GetValue();
height = (int)featureControl.GetIntFeature("Height").GetValue();
isColor = DahengHelper.IsColor(featureControl);
ImageFormat format = ImageFormat.RGB24;
incomingBufferSize = ImageFormatHelper.ComputeBufferSize(width, height, format);
incomingBuffer = new byte[incomingBufferSize];
int outgoingBufferSize = ImageFormatHelper.ComputeBufferSize(width, height, format);
bool topDown = false;
return(new ImageDescriptor(format, width, height, topDown, outgoingBufferSize));
}
public override string GetSummaryAsText(CameraSummary summary)
{
string result = "";
string alias = summary.Alias;
SpecificInfo info = summary.Specific as SpecificInfo;
try
{
if (info != null &&
info.CameraProperties.ContainsKey("Width") &&
info.CameraProperties.ContainsKey("Height") &&
info.CameraProperties.ContainsKey("AcquisitionFrameRate"))
{
int width = int.Parse(info.CameraProperties["Width"].CurrentValue, CultureInfo.InvariantCulture);
int height = int.Parse(info.CameraProperties["Height"].CurrentValue, CultureInfo.InvariantCulture);
double framerate = DahengHelper.GetResultingFramerate(info.Device);
if (framerate == 0)
{
framerate = double.Parse(info.CameraProperties["AcquisitionFrameRate"].CurrentValue, CultureInfo.InvariantCulture);
}
result = string.Format("{0} - {1}×{2} @ {3:0.##} fps.", alias, width, height, framerate);
}
else
{
result = string.Format("{0}", alias);
}
}
catch
{
result = string.Format("{0}", alias);
}
return(result);
}
private void UpdateResultingFramerate()
{
float resultingFramerate = (float)DahengHelper.GetResultingFramerate(device);
if (resultingFramerate == 0)
{
lblResultingFramerate.Visible = false;
lblResultingFramerateValue.Visible = false;
return;
}
lblResultingFramerateValue.Text = string.Format("{0:0.##}", resultingFramerate);
bool discrepancy = false;
if (cameraProperties.ContainsKey("AcquisitionFrameRate") && cameraProperties["AcquisitionFrameRate"].Supported)
{
float framerate;
bool parsed = float.TryParse(cameraProperties["AcquisitionFrameRate"].CurrentValue, NumberStyles.Any, CultureInfo.InvariantCulture, out framerate);
if (parsed && Math.Abs(framerate - resultingFramerate) > 1)
{
discrepancy = true;
}
}
lblResultingFramerateValue.ForeColor = discrepancy ? Color.Red : Color.Black;
}