// InitializeCamera() opens the camera session via the canon sdk wrapper, sets the right modes and starts the live view image feed
private bool InitializeCamera(Camera camera)
{
try
{
CameraWrapper.OpenSession(camera);
Console.Write("Done.\nAdjusting settings...");
CameraWrapper.SetSetting(EDSDK.PropID_Av, CameraValues.AV(Settings.Av));
CameraWrapper.SetSetting(EDSDK.PropID_Tv, CameraValues.TV(Settings.Tv));
CameraWrapper.SetSetting(EDSDK.PropID_ISOSpeed, CameraValues.ISO(Settings.ISO));
CameraWrapper.SetSetting(EDSDK.PropID_WhiteBalance, (uint)Settings.WB);
Console.Write("Done.\nStarting LiveView...");
LiveViewUpdating = false;
CameraWrapper.StartLiveView();
if (CameraWrapper.IsLiveViewOn)
{
Console.WriteLine("Done.");
return(true);
}
Console.WriteLine("Error!\n-> LiveView dit not start for some reason.");
}
catch (Exception e)
{
Console.WriteLine("Error!\n-> " + e.Message);
}
return(false);
}
// Disconnect camera
private void CloseCamera()
{
if (!CameraWrapper.CameraSessionOpen)
{
return;
}
if (!CameraWrapper.IsLiveViewOn)
{
return;
}
// Unset Depth of Field Preview to avoid errorous states in the camera
CameraWrapper.SetSetting(EDSDK.PropID_Evf_DepthOfFieldPreview, 0);
LiveViewUpdating = false;
// Don't call CloseSession() here! The SetSetting call above will result in a exception in a different thread in the CanonEDSDKWrapper
// The wrapper will call closesession when it is needed
}
// LiveViewUpdated() is called from the canon sdk wrapper when a new image is read from the camera and is ready for processing
// LiveViewUpdated() writes the image to the anonymous memory pipe.
// An IO error will terminate the application.
// Depth Of Field Preview mode is also enabled after the first received image (to avoid a black screen)
private void LiveViewUpdated(Stream img)
{
// Check if first image
if (!LiveViewUpdating)
{
Console.WriteLine("Received first image from camera. Enabling Depth of Field Preview.");
// Enable Depth of Field Preview mode for auto focus
// Enabling it now seems to work better than right after calling StartLiveView() (for some reason)
CameraWrapper.SetSetting(EDSDK.PropID_Evf_DepthOfFieldPreview, 1);
LiveViewUpdating = true;
}
if (PipeClient.IsConnected)
{
try
{
// Protocol: int32 [image length] + length amount of image data in bytes
int written;
int length = (int)img.Length;
if (length <= 0)
{
return;
}
byte[] buffer = new byte[length];
PipeWriter.Write(length);
while ((written = img.Read(buffer, 0, buffer.Length)) != 0)
{
PipeWriter.Write(buffer, 0, written);
}
PipeWriter.Flush();
}
catch (IOException e)
{
Console.WriteLine("Pipe error: {0}", e.Message);
CloseCamera();
Application.Exit();
}
}
else
{
Console.WriteLine("Pipe disconnected during image update, exiting...");
CloseCamera();
Application.Exit();
}
}