/// <summary>
/// Creates a new photo capture based on the <paramref name="captureMode"/> specified.
/// </summary>
/// <param name="captureMode">Capture mode to create photo capture for.</param>
/// <returns>Photo capture created.</returns>
/// <exception cref="InvalidOperationException"><paramref name="captureMode"/> is not supported.</exception>
private IPhotoCapture CreatePhotoCapture(CaptureMode captureMode)
{
Tracing.Trace("PhotoCamera: Creating new capture {0}", captureMode);
IPhotoCapture capture;
switch (captureMode)
{
case CaptureMode.LowLag:
capture = new LowLagCapture(this.CameraController);
break;
case CaptureMode.Variable:
// VPS may not be supported on the current device.
if (!this.CameraController.MediaCapture.VideoDeviceController.VariablePhotoSequenceController.Supported)
{
throw new NotSupportedException("VPS is not supported.");
}
capture = new VariablePhotoCapture(this.CameraController);
break;
default:
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "Capture mode {0} is not supported.", captureMode));
}
this.captureStarted = false;
this.SubscribeToCaptureEvents(capture);
return(capture);
}
/// <summary>
/// Unsubscribes from the <paramref name="capture"/> events.
/// </summary>
/// <param name="capture">Photo capture.</param>
private void UnsubscribeFromCaptureEvents(IPhotoCapture capture)
{
Tracing.Trace("PhotoCamera: Unsubscribing from capture events.");
capture.Started -= this.CaptureOnStarted;
capture.Stopped -= this.CaptureOnStopped;
LowLagCapture lowLagCapture = capture as LowLagCapture;
if (lowLagCapture != null)
{
lowLagCapture.PhotoCaptured -= this.LowLagCaptureOnPhotoCaptured;
return;
}
VariablePhotoCapture variableCapture = capture as VariablePhotoCapture;
if (variableCapture != null)
{
variableCapture.PhotoCaptured -= this.VariableCaptureOnPhotoCaptured;
}
}
/// <summary>
/// Subscribes to the <paramref name="capture"/> events.
/// </summary>
/// <param name="capture">Photo capture.</param>
private void SubscribeToCaptureEvents(IPhotoCapture capture)
{
Tracing.Trace("PhotoCamera: Subscribing to capture events.");
capture.Started += this.CaptureOnStarted;
capture.Stopped += this.CaptureOnStopped;
// Subscribe to a specific capture events.
// See IPhotoCapture remarks section for details.
LowLagCapture lowLagCapture = capture as LowLagCapture;
if (lowLagCapture != null)
{
lowLagCapture.PhotoCaptured += this.LowLagCaptureOnPhotoCaptured;
return;
}
VariablePhotoCapture variableCapture = capture as VariablePhotoCapture;
if (variableCapture != null)
{
variableCapture.PhotoCaptured += this.VariableCaptureOnPhotoCaptured;
}
}