public void DidOutputMetadataObjects(AVCaptureMetadataOutput captureOutput, AVMetadataObject[] faces, AVCaptureConnection connection)
{
List<int> unseen = faceViews.Keys.ToList ();
List<int> seen = new List<int> ();
CATransaction.Begin ();
CATransaction.SetValueForKey (NSObject.FromObject (true), (NSString) (CATransaction.DisableActions.ToString ()));
foreach (var face in faces) {
int faceId = (face as AVMetadataFaceObject).FaceID;
unseen.Remove (faceId);
seen.Add (faceId);
FaceView view;
if (faceViews.ContainsKey (faceId))
view = faceViews [faceId];
else {
view = new FaceView ();
view.Layer.CornerRadius = 10;
view.Layer.BorderWidth = 3;
view.Layer.BorderColor = UIColor.Green.CGColor;
previewView.AddSubview (view);
faceViews.Add (faceId, view);
view.Id = faceId;
view.Callback = TouchCallBack;
if (lockedFaceID != null)
view.Alpha = 0;
}
AVMetadataFaceObject adjusted = (AVMetadataFaceObject)(previewView.Layer as AVCaptureVideoPreviewLayer).GetTransformedMetadataObject (face);
view.Frame = adjusted.Bounds;
}
foreach (int faceId in unseen) {
FaceView view = faceViews [faceId];
view.RemoveFromSuperview ();
faceViews.Remove (faceId);
if (faceId == lockedFaceID)
clearLockedFace ();
}
if (lockedFaceID != null) {
FaceView view = faceViews [lockedFaceID.GetValueOrDefault ()];
float size = (float)Math.Max (view.Frame.Size.Width, view.Frame.Size.Height) / device.VideoZoomFactor;
float zoomDelta = lockedFaceSize / size;
float lockTime = (float)(CATransition.CurrentMediaTime () - this.lockTime);
float zoomRate = (float)(Math.Log (zoomDelta) / lockTime);
if (Math.Abs (zoomDelta) > 0.1)
device.RampToVideoZoom (zoomRate > 0 ? MaxZoom : 1, zoomRate);
}
CATransaction.Commit ();
}
partial void meme(NSObject sender)
{
memeEffect.Seek(CMTime.Zero);
memeEffect.Play();
NSObject.CancelPreviousPerformRequest(this);
PerformSelector(new ObjCRuntime.Selector("flash"), null, MEME_FLASH_DELAY);
PerformSelector(new ObjCRuntime.Selector("startZoom:"), NSNumber.FromFloat(getZoomSliderValue()), MEME_ZOOM_DELAY);
device.VideoZoomFactor = 1;
foreach (var faceId in faceViews.Keys)
{
FaceView view = faceViews [faceId];
view.Alpha = 0;
}
}
void TouchCallBack(int faceId, FaceView view)
{
lockedFaceID = faceId;
lockedFaceSize = Math.Max(view.Frame.Size.Width, view.Frame.Size.Height) / device.VideoZoomFactor;
lockTime = CATransition.CurrentMediaTime();
UIView.BeginAnimations(null, IntPtr.Zero);
UIView.SetAnimationDuration(0.3f);
view.Layer.BorderColor = UIColor.Red.CGColor;
foreach (var face in faceViews.Values)
{
if (face != view)
{
face.Alpha = 0;
}
}
UIView.CommitAnimations();
beepEffect.Seek(CMTime.Zero);
beepEffect.Play();
}
public void DidOutputMetadataObjects(AVCaptureMetadataOutput captureOutput, AVMetadataObject[] faces, AVCaptureConnection connection)
{
List <int> unseen = faceViews.Keys.ToList();
List <int> seen = new List <int> ();
CATransaction.Begin();
CATransaction.SetValueForKey(NSObject.FromObject(true), (NSString)(CATransaction.DisableActions.ToString()));
foreach (var face in faces)
{
// HACK: int faceId = (face as AVMetadataFaceObject).FaceID;
int faceId = (int)(face as AVMetadataFaceObject).FaceID;
unseen.Remove(faceId);
seen.Add(faceId);
FaceView view;
if (faceViews.ContainsKey(faceId))
{
view = faceViews [faceId];
}
else
{
view = new FaceView();
view.Layer.CornerRadius = 10;
view.Layer.BorderWidth = 3;
view.Layer.BorderColor = UIColor.Green.CGColor;
previewView.AddSubview(view);
faceViews.Add(faceId, view);
view.Id = faceId;
view.Callback = TouchCallBack;
if (lockedFaceID != null)
{
view.Alpha = 0;
}
}
AVMetadataFaceObject adjusted = (AVMetadataFaceObject)(previewView.Layer as AVCaptureVideoPreviewLayer).GetTransformedMetadataObject(face);
view.Frame = adjusted.Bounds;
}
foreach (int faceId in unseen)
{
FaceView view = faceViews [faceId];
view.RemoveFromSuperview();
faceViews.Remove(faceId);
if (faceId == lockedFaceID)
{
clearLockedFace();
}
}
if (lockedFaceID != null)
{
FaceView view = faceViews [lockedFaceID.GetValueOrDefault()];
// HACK: Cast resulting nfloat to float
// float size = (float)Math.Max (view.Frame.Size.Width, view.Frame.Size.Height) / device.VideoZoomFactor;
float size = (float)(Math.Max(view.Frame.Size.Width, view.Frame.Size.Height) / device.VideoZoomFactor);
float zoomDelta = lockedFaceSize / size;
float lockTime = (float)(CATransition.CurrentMediaTime() - this.lockTime);
float zoomRate = (float)(Math.Log(zoomDelta) / lockTime);
if (Math.Abs(zoomDelta) > 0.1)
{
device.RampToVideoZoom(zoomRate > 0 ? MaxZoom : 1, zoomRate);
}
}
CATransaction.Commit();
}
void TouchCallBack(int faceId, FaceView view)
{
lockedFaceID = faceId;
lockedFaceSize = Math.Max (view.Frame.Size.Width, view.Frame.Size.Height) / device.VideoZoomFactor;
lockTime = CATransition.CurrentMediaTime ();
UIView.BeginAnimations (null, IntPtr.Zero);
UIView.SetAnimationDuration (0.3f);
view.Layer.BorderColor = UIColor.Red.CGColor;
foreach (var face in faceViews.Values) {
if (face != view)
face.Alpha = 0;
}
UIView.CommitAnimations ();
beepEffect.Seek (CMTime.Zero);
beepEffect.Play ();
}