/// <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 SnapshotRetriever(CameraSummary summary, IGXFactory igxFactory)
{
this.summary = summary;
try
{
stopwatch.Start();
device = igxFactory.OpenDeviceBySN(summary.Identifier, GX_ACCESS_MODE.GX_ACCESS_EXCLUSIVE);
log.DebugFormat("{0} opened in {1} ms.", summary.Alias, stopwatch.ElapsedMilliseconds);
stopwatch.Stop();
featureControl = device.GetRemoteFeatureControl();
DahengHelper.AfterOpen(featureControl);
width = (int)featureControl.GetIntFeature("Width").GetValue();
height = (int)featureControl.GetIntFeature("Height").GetValue();
isColor = DahengHelper.IsColor(featureControl);
stream = device.OpenStream(0);
}
catch (Exception e)
{
LogError(e, "Failed to open device");
}
}
public SnapshotRetriever(CameraSummary summary, IGXFactory igxFactory)
{
this.summary = summary;
try
{
device = igxFactory.OpenDeviceBySN(summary.Identifier, GX_ACCESS_MODE.GX_ACCESS_EXCLUSIVE);
featureControl = device.GetRemoteFeatureControl();
DahengHelper.AfterOpen(featureControl);
width = (int)featureControl.GetIntFeature("Width").GetValue();
height = (int)featureControl.GetIntFeature("Height").GetValue();
isColor = DahengHelper.IsColor(featureControl);
stream = device.OpenStream(0);
}
catch (Exception e)
{
LogError(e, "Failed to open device");
}
}
private void Open()
{
if (device != null)
{
Close();
}
bool open = false;
try
{
device = igxFactory.OpenDeviceBySN(summary.Identifier, GX_ACCESS_MODE.GX_ACCESS_EXCLUSIVE);
featureControl = device.GetRemoteFeatureControl();
DahengHelper.AfterOpen(featureControl);
open = true;
}
catch
{
log.DebugFormat("Could not open Daheng device.");
}
if (!open)
{
return;
}
SpecificInfo specific = summary.Specific as SpecificInfo;
if (specific == null)
{
return;
}
// Store the camera object into the specific info so that we can retrieve device informations from the configuration dialog.
specific.Device = device;
isColor = DahengHelper.IsColor(featureControl);
if (firstOpen)
{
// Always default to RGB24 for color cameras and Y800 for mono cameras.
// Raw mode will have to be switched explicitly everytime for now.
currentStreamFormat = isColor ? DahengStreamFormat.RGB : DahengStreamFormat.Mono;
// Grab current values.
Dictionary <string, CameraProperty> cameraProperties = CameraPropertyManager.Read(device);
specific.CameraProperties = cameraProperties;
specific.StreamFormat = currentStreamFormat;
}
else
{
CameraPropertyManager.WriteCriticalProperties(device, specific.CameraProperties);
if (specific.StreamFormat != currentStreamFormat)
{
currentStreamFormat = specific.StreamFormat;
}
}
try
{
stream = device.OpenStream(0);
}
catch
{
log.Debug("Could not start Daheng device.");
}
}