private void StartLiveView()
{
//if (!IsActive)
// return;
string resp = SelectedCameraDevice.GetProhibitionCondition(OperationEnum.LiveView);
if (string.IsNullOrEmpty(resp))
{
Thread thread = new Thread(StartLiveViewThread);
thread.Start();
thread.Join();
}
else
{
Log.Error("Error starting live view " + resp);
// in nikon case no show error message
// if the images not transferd yet from SDRam
if (resp != "LabelImageInRAM" && resp != "LabelCommandProcesingError")
{
ServiceProvider.WindowsManager.ExecuteCommand(WindowsCmdConsts.LiveViewWnd_Message,
TranslationStrings.LabelLiveViewError + "\n" +
TranslationManager.GetTranslation(resp));
}
}
}
private void GetLiveImage()
{
if (_operInProgress)
{
return;
}
try
{
LiveViewData = SelectedCameraDevice.GetLiveViewImage();
}
catch (Exception ex)
{
Log.Error("Error geting lv", ex);
_operInProgress = false;
return;
}
if (LiveViewData == null)
{
_operInProgress = false;
return;
}
try
{
if (LiveViewData != null && LiveViewData.ImageData != null)
{
MemoryStream stream = new MemoryStream(LiveViewData.ImageData,
LiveViewData.
ImageDataPosition,
LiveViewData.ImageData.
Length -
LiveViewData.
ImageDataPosition);
BitmapImage bi = new BitmapImage();
bi.BeginInit();
bi.CacheOption = BitmapCacheOption.OnLoad;
bi.StreamSource = stream;
bi.EndInit();
bi.Freeze();
WriteableBitmap bitmap = BitmapFactory.ConvertToPbgra32Format(bi);
DrawGrid(bitmap);
bitmap.Freeze();
Bitmap = bitmap;
_operInProgress = false;
return;
}
}
catch (Exception ex)
{
Log.Error("Error geting lv", ex);
_operInProgress = false;
return;
}
}
public LiveViewViewModel()
{
StartLiveViewCommand = new RelayCommand(StartLiveView);
StopLiveViewCommand = new RelayCommand(StopLiveView);
SetAreaCommand = new RelayCommand(() => SettingArea = true);
DoneSetAreaCommand = new RelayCommand(() => SettingArea = false);
_timer.AutoReset = true;
_timer.Elapsed += _timer_Elapsed;
if (!IsInDesignMode)
{
SelectedCameraDevice = ServiceProvider.DeviceManager.SelectedCameraDevice;
CameraProperty = SelectedCameraDevice.LoadProperties();
}
}
private void StartLiveViewThread()
{
try
{
bool retry = false;
int retryNum = 0;
Log.Debug("LiveView: Liveview started");
do
{
try
{
SelectedCameraDevice.StartLiveView();
}
catch (DeviceException deviceException)
{
if (deviceException.ErrorCode == ErrorCodes.ERROR_BUSY ||
deviceException.ErrorCode == ErrorCodes.MTP_Device_Busy)
{
Thread.Sleep(100);
Log.Debug("Retry live view :" + deviceException.ErrorCode.ToString("X"));
retry = true;
retryNum++;
}
else
{
throw;
}
}
} while (retry && retryNum < 35);
_timer.Start();
_operInProgress = false;
Log.Debug("LiveView: Liveview start done");
}
catch (Exception exception)
{
Log.Error("Unable to start liveview !", exception);
StaticHelper.Instance.SystemMessage = "Unable to start liveview ! " + exception.Message;
}
}
