void FocusWithMode(AVCaptureFocusMode focusMode, AVCaptureExposureMode exposureMode, CGPoint point, bool monitorSubjectAreaChange)
{
sessionQueue.DispatchAsync(() =>
{
var device = videoDeviceInput.Device;
NSError error = null;
if (device.LockForConfiguration(out error))
{
/*
* Setting (focus/exposure)PointOfInterest alone does not initiate a (focus/exposure) operation.
* Call set(Focus/Exposure)Mode() to apply the new point of interest.
*/
if (device.FocusPointOfInterestSupported && device.IsFocusModeSupported(focusMode))
{
device.FocusPointOfInterest = point;
device.FocusMode = focusMode;
}
if (device.ExposurePointOfInterestSupported && device.IsExposureModeSupported(exposureMode))
{
device.ExposurePointOfInterest = point;
device.ExposureMode = exposureMode;
}
device.SubjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange;
device.UnlockForConfiguration();
}
else
{
Console.WriteLine($"Could not lock device for configuration: {error}");
}
});
}
void UpdateDeviceFocus(AVCaptureFocusMode focusMode, AVCaptureExposureMode exposureMode, CGPoint point, bool monitorSubjectAreaChange)
{
sessionQueue.DispatchAsync(() => {
var device = videoDeviceInput?.Device;
if (device == null)
{
return;
}
NSError error;
if (device.LockForConfiguration(out error))
{
// Setting (Focus/Exposure)PointOfInterest alone does not initiate a (focus/exposure) operation.
// Set (Focus/Exposure)Mode to apply the new point of interest.
if (device.FocusPointOfInterestSupported && device.IsFocusModeSupported(focusMode))
{
device.FocusPointOfInterest = point;
device.FocusMode = focusMode;
}
if (device.ExposurePointOfInterestSupported && device.IsExposureModeSupported(exposureMode))
{
device.ExposurePointOfInterest = point;
device.ExposureMode = exposureMode;
}
device.SubjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange;
device.UnlockForConfiguration();
}
else
{
Console.WriteLine($"Could not lock device for configuration: {error.LocalizedDescription}");
}
});
}
public static bool TrySetFocusMode (this AVCaptureDevice device, AVCaptureFocusMode mode)
{
bool isSupported = device.IsFocusModeSupported (mode);
if (isSupported)
device.FocusMode = mode;
return isSupported;
}
public static bool TrySetFocusMode(this AVCaptureDevice device, AVCaptureFocusMode mode)
{
bool isSupported = device.IsFocusModeSupported(mode);
if (isSupported)
{
device.FocusMode = mode;
}
return(isSupported);
}
/// <summary>
/// Set the device's focus settings
/// </summary>
/// <returns><see cref="T:ChilliSource.Mobile.Core.OperationResult"/> instance indicating the outcome of the operation</returns>
/// <param name="videoDeviceInput">Video device input.</param>
/// <param name="focusMode">Focus mode.</param>
/// <param name="exposureMode">Exposure mode.</param>
/// <param name="pointOfInterest">Point of interest</param>
/// <param name="monitorSubjectAreaChange">If set to <c>true</c> monitor subject area change.</param>
public static OperationResult UpdateFocus(this AVCaptureDeviceInput videoDeviceInput, AVCaptureFocusMode focusMode,
AVCaptureExposureMode exposureMode, CGPoint pointOfInterest, bool monitorSubjectAreaChange)
{
if (videoDeviceInput == null)
{
return(OperationResult.AsFailure("device input is null"));
}
AVCaptureDevice device = videoDeviceInput.Device;
NSError error;
if (device.LockForConfiguration(out error))
{
if (device.FocusPointOfInterestSupported && device.IsFocusModeSupported(focusMode))
{
device.FocusPointOfInterest = pointOfInterest;
device.FocusMode = focusMode;
}
if (device.ExposurePointOfInterestSupported && device.IsExposureModeSupported(exposureMode))
{
device.ExposurePointOfInterest = pointOfInterest;
device.ExposureMode = exposureMode;
}
device.SubjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange;
device.UnlockForConfiguration();
return(OperationResult.AsSuccess());
}
else
{
return(OperationResult.AsFailure(string.Format("Could not lock device for configuration: {0}", error)));
}
}
void UpdateDeviceFocus (AVCaptureFocusMode focusMode, AVCaptureExposureMode exposureMode, CGPoint point, bool monitorSubjectAreaChange)
{
sessionQueue.DispatchAsync (() => {
var device = videoDeviceInput?.Device;
if (device == null)
return;
NSError error;
if (device.LockForConfiguration (out error)) {
// Setting (Focus/Exposure)PointOfInterest alone does not initiate a (focus/exposure) operation.
// Set (Focus/Exposure)Mode to apply the new point of interest.
if (device.FocusPointOfInterestSupported && device.IsFocusModeSupported (focusMode)) {
device.FocusPointOfInterest = point;
device.FocusMode = focusMode;
}
if (device.ExposurePointOfInterestSupported && device.IsExposureModeSupported (exposureMode)) {
device.ExposurePointOfInterest = point;
device.ExposureMode = exposureMode;
}
device.SubjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange;
device.UnlockForConfiguration ();
} else {
Console.WriteLine ($"Could not lock device for configuration: {error.LocalizedDescription}");
}
});
}
void SetFocusAndMode (AVCaptureFocusMode focusMode, AVCaptureExposureMode exposureMode, CGPoint point, bool monitorSubjectAreaChange)
{
sessionQueue.DispatchAsync (() => {
AVCaptureDevice device = VideoDevice;
NSError error = null;
if (device.LockForConfiguration (out error)) {
// Setting (Focus|Exposure)PointOfInterest alone does not initiate a (focus/exposure) operation
// Set (Focus|Exposure)Mode to apply the new point of interest
if (focusMode != AVCaptureFocusMode.Locked && device.FocusPointOfInterestSupported && device.IsFocusModeSupported (focusMode)) {
device.FocusMode = focusMode;
device.FocusPointOfInterest = point;
}
if (exposureMode != AVCaptureExposureMode.Custom && device.ExposurePointOfInterestSupported && device.IsExposureModeSupported (exposureMode)) {
device.ExposureMode = exposureMode;
device.ExposurePointOfInterest = point;
}
device.SubjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange;
device.UnlockForConfiguration ();
} else {
Console.WriteLine ($"Could not lock device for configuration: {error}");
}
});
}
static string StringFromFocusMode (AVCaptureFocusMode focusMode)
{
switch (focusMode) {
case AVCaptureFocusMode.Locked:
return "Locked";
case AVCaptureFocusMode.AutoFocus:
return "Auto";
case AVCaptureFocusMode.ContinuousAutoFocus:
return "ContinuousAuto";
default:
return "INVALID FOCUS MODE";
}
}