private void SetPinchGesture()
{
nfloat lastscale = 1.0f;
Pinch = new UIPinchGestureRecognizer((e) =>
{
if (e.State == UIGestureRecognizerState.Changed)
{
NSError device_error;
MainDevice.LockForConfiguration(out device_error);
if (device_error != null)
{
Console.WriteLine($"Error: {device_error.LocalizedDescription}");
MainDevice.UnlockForConfiguration();
return;
}
var scale = e.Scale + (1 - lastscale);
var zoom = MainDevice.VideoZoomFactor * scale;
if (zoom > MaxZoom)
{
zoom = MaxZoom;
}
if (zoom < MinZoom)
{
zoom = MinZoom;
}
MainDevice.VideoZoomFactor = zoom;
MainDevice.UnlockForConfiguration();
lastscale = e.Scale;
}
else if (e.State == UIGestureRecognizerState.Ended)
{
lastscale = 1.0f;
}
});
this.AddGestureRecognizer(Pinch);
}
private void Initialize()
{
//Pinchジェスチャ登録
SetPinchGesture();
//デバイス設定
var videoDevices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
var cameraPosition = (cameraOptions == CameraOptions.Front) ? AVCaptureDevicePosition.Front : AVCaptureDevicePosition.Back;
MainDevice = videoDevices.FirstOrDefault(d => d.Position == cameraPosition);
NSError device_error;
MainDevice.LockForConfiguration(out device_error);
if (device_error != null)
{
Console.WriteLine($"Error: {device_error.LocalizedDescription}");
MainDevice.UnlockForConfiguration();
return;
}
//フレームレート設定
MainDevice.ActiveVideoMinFrameDuration = new CMTime(1, 24);
MainDevice.UnlockForConfiguration();
if (MainDevice == null)
{
return;
}
//max zoom
MaxZoom = (float)Math.Min(MainDevice.ActiveFormat.VideoMaxZoomFactor, 6);
//入力設定
NSError error;
Input = new AVCaptureDeviceInput(MainDevice, out error);
CaptureSession.AddInput(Input);
//出力設定
Output = new AVCaptureVideoDataOutput();
//フレーム処理用
Queue = new DispatchQueue("myQueue");
Output.AlwaysDiscardsLateVideoFrames = true;
Recorder = new OutputRecorder()
{
Camera = Camera
};
Output.SetSampleBufferDelegate(Recorder, Queue);
var vSettings = new AVVideoSettingsUncompressed();
vSettings.PixelFormatType = CVPixelFormatType.CV32BGRA;
Output.WeakVideoSettings = vSettings.Dictionary;
CaptureSession.AddOutput(Output);
if (IsPreviewing)
{
CaptureSession.StartRunning();
}
}
