public override void WindowControllerDidLoadNib (NSWindowController windowController)
{
base.WindowControllerDidLoadNib (windowController);
// A reference to the window controller must be kept on the managed side
// to keep the object from being GC'd so that the delegates below resolve.
// Don't remove unless the framework is updated to track the reference.
this.windowController = windowController;
NSError err;
windowController.Window.WillClose += delegate {
if (captureSession != null)
captureSession.StopRunning ();
var dev = captureInput.Device;
if (dev.IsOpen)
dev.Close ();
};
// Create a movie, and store the information in memory on an NSMutableData
movie = new QTMovie (new NSMutableData (1), out err);
if (movie == null){
NSAlert.WithError (err).RunModal ();
return;
}
movieView.Movie = movie;
// Find video device
captureSession = new QTCaptureSession ();
var device = QTCaptureDevice.GetDefaultInputDevice (QTMediaType.Video);
if (!device.Open (out err)){
NSAlert.WithError (err).RunModal ();
return;
}
// Add device input
captureInput = new QTCaptureDeviceInput (device);
if (!captureSession.AddInput (captureInput, out err)){
NSAlert.WithError (err).RunModal ();
return;
}
// Create decompressor for video output, to get raw frames
decompressedVideo = new QTCaptureDecompressedVideoOutput ();
decompressedVideo.DidOutputVideoFrame += delegate(object sender, QTCaptureVideoFrameEventArgs e) {
lock (this){
currentImage = e.VideoFrame;
}
};
if (!captureSession.AddOutput (decompressedVideo, out err)){
NSAlert.WithError (err).RunModal ();
return;
}
// Activate preview
captureView.CaptureSession = captureSession;
// Start running.
captureSession.StartRunning ();
}
public override void OutputVideoFrame(CVImageBuffer videoFrame, QTSampleBuffer sampleBuffer, QTCaptureConnection connection)
{
if (videoFrame == null) {
throw new ArgumentNullException ("videoFrame");
}
if (sampleBuffer == null) {
throw new ArgumentNullException ("sampleBuffer");
}
if (connection == null) {
throw new ArgumentNullException ("connection");
}
if (!capture) {
videoFrame.Dispose ();
sampleBuffer.Dispose ();
return;
}
Console.WriteLine("Capturing photo");
capture = false;
try
{
var imagePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
"captured_image.tiff");
var image = CIImage.FromImageBuffer(videoFrame);
var imageRep = new NSBitmapImageRep(image);
var tiffImage = imageRep.TiffRepresentation;
var bytes = new byte[tiffImage.Length];
Marshal.Copy(tiffImage.Bytes, bytes, 0, (int)tiffImage.Length);
File.WriteAllBytes(imagePath, bytes);
// NSError error;
// tiffImage.Save(imagePath, MonoMac.Foundation.NSDataWritingOptions.FileProtectionNone, out error);
Console.WriteLine("Wrote image: '{0}'", imagePath);
tiffImage.Dispose();
imageRep.Dispose();
videoFrame.Dispose();
sampleBuffer.Dispose();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
public static CMSampleBuffer CreateForImageBuffer (CVImageBuffer imageBuffer, bool dataReady, CMVideoFormatDescription formatDescription, CMSampleTimingInfo sampleTiming, out CMSampleBufferError error)
{
if (imageBuffer == null)
throw new ArgumentNullException ("imageBuffer");
if (formatDescription == null)
throw new ArgumentNullException ("formatDescription");
IntPtr buffer;
error = CMSampleBufferCreateForImageBuffer (IntPtr.Zero,
imageBuffer.handle, dataReady,
IntPtr.Zero, IntPtr.Zero,
formatDescription.handle,
ref sampleTiming,
out buffer);
if (error != CMSampleBufferError.None)
return null;
return new CMSampleBuffer (buffer, true);
}
public bool VideoMatchesImageBuffer(CVImageBuffer imageBuffer)
{
if (imageBuffer == null)
throw new ArgumentNullException ("imageBuffer");
return CMVideoFormatDescriptionMatchesImageBuffer (handle, imageBuffer.Handle) != 0;
}
public static CMVideoFormatDescription CreateForImageBuffer(CVImageBuffer imageBuffer, out CMFormatDescriptionError error)
{
if (imageBuffer == null)
throw new ArgumentNullException ("imageBuffer");
IntPtr desc;
error = CMVideoFormatDescriptionCreateForImageBuffer (IntPtr.Zero, imageBuffer.handle, out desc);
if (error != CMFormatDescriptionError.None)
return null;
return new CMVideoFormatDescription (desc, true);
}
