public async void Start()
{
if (idx == 0)
{
idx++;
_camera = Camera.Open(1);
var camParams = _camera.GetParameters();
var fps = camParams.SupportedPreviewFpsRange;
camParams.SetPreviewSize(640, 480);
camParams.SetPreviewFpsRange(fps[0][0], fps[0][1]);
var supportedPictureFormats = camParams.SupportedPictureFormats;
var previewFormat = camParams.PreviewFormat;
var supportedpreviewFormat = camParams.SupportedPreviewFormats;
foreach (var item in supportedpreviewFormat)
{
Graph.ImageFormatType type = (Graph.ImageFormatType)item.IntValue();
}
_camera.SetParameters(camParams);
_camera.SetPreviewTexture(_textureView);
_camera.SetDisplayOrientation(90);
_camera.SetPreviewCallback(new CameraPreviewCallback(this.nv21Sender));
_camera.StartPreview();
//if (CrossMedia.Current.IsTakePhotoSupported)
//{
// await this.CheckPermissions();
// try
// {
// await CrossMedia.Current.Initialize();
// var file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions()
// { DefaultCamera = CameraDevice.Front }
// );
// }
// catch (Exception e)
// {
// }
//}
}
}
protected override void OnStart()
{
try
{
if (Camera == null)
{
Camera = Hardware.Camera.Open(cameraIndex);
}
if (Texture == null)
{
Texture = new Graphics.SurfaceTexture(0);
}
CameraPreviewCallback callback = new CameraPreviewCallback();
callback.PreviewUpdated += Callback_PreviewUpdated;
Hardware.Camera.Parameters parameter = Camera.GetParameters();
List <Hardware.Camera.Size> supportSize = parameter.SupportedPreviewSizes.OrderByDescending(x => x.Width).ToList();
foreach (Hardware.Camera.Size size in supportSize)
{
CvLogger.Log(this, $"Camera Support Size: W{size.Width},H{size.Height}");
if (size.Width == 960 && size.Height == 720)
{
parameter.SetPreviewSize(size.Width, size.Height);
CvLogger.Log(this, $"SET Camera Size: W{size.Width},H{size.Height}");
}
}
string[] supportedFocusMode = parameter.SupportedFocusModes.ToArray();
if (supportedFocusMode.Contains(Hardware.Camera.Parameters.FocusModeContinuousVideo))
{
parameter.FocusMode = Hardware.Camera.Parameters.FocusModeContinuousVideo;
}
else if (supportedFocusMode.Contains(Hardware.Camera.Parameters.FocusModeContinuousPicture))
{
parameter.FocusMode = Hardware.Camera.Parameters.FocusModeContinuousPicture;
}
parameter.ColorEffect = Hardware.Camera.Parameters.EffectNone;
width = parameter.PreviewSize.Width;
height = parameter.PreviewSize.Height;
fps = parameter.PreviewFrameRate;
cameraType = parameter.PreviewFormat;
CvLogger.Log(this, string.Format("Camera is creating W{0} H{1} FPS{2}", width, height, fps));
Camera.SetParameters(parameter);
Camera.SetPreviewCallback(callback);
Camera.SetPreviewTexture(Texture);
Camera.StartPreview();
cameraOn = true;
}
catch (Exception ex)
{
CvLogger.Log(this, "Camera Init Failed.\n" + ex.ToString());
Dispose();
throw new ArgumentException("Camera Exception", ex);
}
}
