public CameraFeedRenderer(Context context) : base(context)
{
cameraManager = (CameraManager)Context.GetSystemService(Context.CameraService);
windowManager = Context.GetSystemService(Context.WindowService).JavaCast <IWindowManager>();
StateCallback = new CameraStateCallback(this);
SessionCallback = new CameraCaptureSessionCallback(this);
CaptureListener = new CameraCaptureListener(this);
CameraImageReaderListener = new CameraImageListener(this);
OrientationEventListener = new CameraPageOrientationEventListener(this, Context, global::Android.Hardware.SensorDelay.Normal);
}
public CameraCaptureStateCallback
(
CaptureRequest.Builder captureBuilder,
CameraCaptureSessionCallback captureListener,
Handler backgroundHandler
)
{
_captureBuilder = captureBuilder;
_captureListener = captureListener;
_backgroundHandler = backgroundHandler;
}
public VideoSource()
{
OrientationToDegrees.Add(SurfaceOrientation.Rotation0, 90);
OrientationToDegrees.Add(SurfaceOrientation.Rotation90, 0);
OrientationToDegrees.Add(SurfaceOrientation.Rotation180, 270);
OrientationToDegrees.Add(SurfaceOrientation.Rotation270, 180);
Main = SynchronizationContext.Current;
context = MainActivity.Instance;
manager = (CameraManager)context.GetSystemService(Context.CameraService);
listener = new CameraStateListener(this);
callback = new CameraCaptureSessionCallback(this);
StateCallback = new CameraCaptureSessionStateCallback(this);
}
// Creates a new {@link CameraCaptureSession} for camera preview.
public void CreateCameraPreviewSession(bool builderexists = false)
{
try
{
var texture = mTextureView.SurfaceTexture;
if (texture == null)
{
throw new IllegalStateException("texture is null");
}
// We configure the size of default buffer to be the size of camera preview we want.
texture.SetDefaultBufferSize(mPreviewSize.Width, mPreviewSize.Height);
// This is the output Surface we need to start preview.
var surface = new Surface(texture);
// We set up a CaptureRequest.Builder with the output Surface.
if (!builderexists)
{
mPreviewRequestBuilder = mCameraDevice.CreateCaptureRequest(CameraTemplate.Preview);
}
//mPreviewRequestBuilder.Set(CaptureRequest.ControlAeTargetFpsRange, new Android.Util.Range(30, 120));
mPreviewRequestBuilder.Set(CaptureRequest.ControlAeMode, (int)ControlAEMode.On);
mPreviewRequestBuilder.Set(CaptureRequest.ControlAwbMode, (int)ControlAwbMode.Auto);
mPreviewRequestBuilder.Set(CaptureRequest.ControlAePrecaptureTrigger, (int)ControlAEPrecaptureTrigger.Start);
mPreviewRequestBuilder.Set(CaptureRequest.LensOpticalStabilizationMode, (int)LensOpticalStabilizationMode.On);
mPreviewRequestBuilder.Set(CaptureRequest.EdgeMode, (int)EdgeMode.Fast);
mPreviewRequestBuilder.Set(CaptureRequest.ShadingMode, (int)ShadingMode.HighQuality);
mPreviewRequestBuilder.Set(CaptureRequest.TonemapMode, (int)TonemapMode.HighQuality);
mPreviewRequestBuilder.AddTarget(surface);
// Here, we create a CameraCaptureSession for camera preview.
var surfaces = new List <Surface>();
surfaces.Add(surface);
surfaces.Add(mImageReader.Surface);
mCameraCaptureSessionCallback = new CameraCaptureSessionCallback(this);
mCameraDevice.CreateCaptureSession(surfaces, mCameraCaptureSessionCallback, null);
}
catch (CameraAccessException e)
{
Crashes.TrackError(e);
e.PrintStackTrace();
}
}
protected void CapturePicture
(
string picturePath
)
{
if (_cameraDevice == null)
{
return;
}
if (DeviceOrientation == null)
{
throw new NullReferenceException(nameof(DeviceOrientation));
}
if (DeviceOrientation == OrientationEventListener.OrientationUnknown)
{
return;
}
var cameraManager = GetCameraManager();
CameraCharacteristics cameraCharacteristics
= cameraManager.GetCameraCharacteristics(_cameraDevice.Id);
Size[] jpegSizes = null;
Size[] thumbnailSizes = null;
int cameraOrientation = 0;
if (cameraCharacteristics != null)
{
var configurationMap = (StreamConfigurationMap)cameraCharacteristics.Get
(
CameraCharacteristics.ScalerStreamConfigurationMap
);
jpegSizes = configurationMap.GetHighResolutionOutputSizes
(
(int)ImageFormatType.Jpeg
);
if ((jpegSizes == null) || (jpegSizes.Length == 0))
{
jpegSizes = configurationMap.GetOutputSizes
(
(int)ImageFormatType.Jpeg
);
}
thumbnailSizes = cameraCharacteristics.Get
(
CameraCharacteristics.JpegAvailableThumbnailSizes
)
.ToArray <Size>();
cameraOrientation = (int)cameraCharacteristics.Get
(
CameraCharacteristics.SensorOrientation
);
}
int jpegWidth = 640; // why exactly these default values?!
int jpegHeight = 480;
if ((jpegSizes != null) && (jpegSizes.Length > 0))
{
jpegWidth = jpegSizes[0].Width;
jpegHeight = jpegSizes[0].Height;
}
ImageReader imageReader = ImageReader.NewInstance(jpegWidth,
jpegHeight,
ImageFormatType.Jpeg,
maxImages: 1);
var outputSurfaces = new List <Surface>(2);
outputSurfaces.Add(imageReader.Surface);
outputSurfaces.Add(new Surface(TextureView.SurfaceTexture));
CaptureRequest.Builder captureBuilder
= _cameraDevice.CreateCaptureRequest(CameraTemplate.StillCapture);
captureBuilder.AddTarget(imageReader.Surface);
// https://developer.android.com/reference/android/hardware/camera2/CameraMetadata.html#CONTROL_MODE_AUTO
captureBuilder.Set(CaptureRequest.ControlMode,
1); // CONTROL_MODE_AUTO
int pictureRotation = (DeviceOrientation.Value + cameraOrientation) % 360;
captureBuilder.Set(CaptureRequest.JpegOrientation,
pictureRotation);
var jpegQuality = new Byte(JpegQuality);
captureBuilder.Set(CaptureRequest.JpegQuality,
jpegQuality);
captureBuilder.Set(CaptureRequest.JpegThumbnailQuality,
jpegQuality);
var thumbnailSize = GetBestThumbnailSize(jpegWidth,
jpegHeight,
thumbnailSizes);
captureBuilder.Set(CaptureRequest.JpegThumbnailSize,
thumbnailSize);
var pictureFile = new File(picturePath);
imageReader.SetOnImageAvailableListener(new ImageAvailableListener(pictureFile),
_backgroundHandler);
var captureListener = new CameraCaptureSessionCallback(CreateCameraPreview,
OnDone);
_cameraDevice.CreateCaptureSession(outputSurfaces,
new CameraCaptureStateCallback(captureBuilder,
captureListener,
_backgroundHandler),
_backgroundHandler);
}
