private async Task SetHardwareFaceDetectionAsync(MediaCapture mediaCapture = null, bool enable = true)
{
try
{
if (mediaCapture == null)
{
mediaCapture = new MediaCapture();
mediaCapture.Failed += MediaCapture_Failed;
var initializeCancellationToken = new CancellationTokenSource();
await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings()
{
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
SourceGroup = ExclusiveSourceGroup,
StreamingCaptureMode = StreamingCaptureMode.Video
});
mediaCapture.CameraStreamStateChanged += MediaCapture_CameraStreamStateChanged;
mediaCapture.CaptureDeviceExclusiveControlStatusChanged += MediaCapture_CaptureDeviceExclusiveControlStatusChanged;
}
var irFrameSource = mediaCapture.FrameSources[ExclusiveIrSourceInfo.Id];
var irPropertyGet = await irFrameSource.Controller.GetPropertyAsync(KS.PROPERTY_CAMERACONTROL_EXTENDED_FACEDETECTION);
if (irPropertyGet.Status == MediaFrameSourceGetPropertyStatus.Success &&
irPropertyGet.Value is byte[])
{
const bool SetFaceDetectionOn = true;
if (SetFaceDetectionOn)
{
var irProperty = KSCAMERA_EXTENDEDPROP.FromBytes(irPropertyGet.Value as byte[], 0);
UInt64 flags = 0u;
if (!enable)
{
flags = KS.CAMERA_EXTENDEDPROP_FACEDETECTION_OFF;
}
else if ((ExclusiveIrSourceInfo.MediaStreamType == MediaStreamType.VideoPreview) &&
((irProperty.Header.Capability & KS.CAMERA_EXTENDEDPROP_FACEDETECTION_PREVIEW) != 0))
{
flags = KS.CAMERA_EXTENDEDPROP_FACEDETECTION_PREVIEW;
}
else if ((ExclusiveIrSourceInfo.MediaStreamType == MediaStreamType.VideoRecord) &&
((irProperty.Header.Capability & KS.CAMERA_EXTENDEDPROP_FACEDETECTION_VIDEO) != 0))
{
flags = KS.CAMERA_EXTENDEDPROP_FACEDETECTION_VIDEO;
}
if (flags != irProperty.Header.Flags)
{
irProperty.Header.Flags = flags;
var newProperty = irProperty.GetBytes();
var irPropertySet = await irFrameSource.Controller.SetPropertyAsync(KS.PROPERTY_CAMERACONTROL_EXTENDED_FACEDETECTION, newProperty);
if (irPropertySet == MediaFrameSourceSetPropertyStatus.Success)
{
HardwareFaceDetectionEnabled = enable;
}
else
{
// SetHardwareFaceDetectionAsync.Set.Failed
}
}
else
{
HardwareFaceDetectionEnabled = enable;
}
}
else
{
HardwareFaceDetectionEnabled = enable;
}
}
else
{
// SetHardwareFaceDetectionAsync.Get.Failed
}
}
finally
{ // TODO hardware face detection will throw if already activated
}
}
private async Task SetFaceModeAsync(MediaCapture mediaCapture = null)
{
try
{
if (mediaCapture == null)
{
mediaCapture = new MediaCapture();
mediaCapture.Failed += MediaCapture_Failed;
var initializeCancellationToken = new CancellationTokenSource();
await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings()
{
MemoryPreference = MediaCaptureMemoryPreference.Cpu,
SharingMode = MediaCaptureSharingMode.ExclusiveControl,
SourceGroup = ExclusiveSourceGroup,
StreamingCaptureMode = StreamingCaptureMode.Video
});
mediaCapture.CameraStreamStateChanged += MediaCapture_CameraStreamStateChanged;
mediaCapture.CaptureDeviceExclusiveControlStatusChanged += MediaCapture_CaptureDeviceExclusiveControlStatusChanged;
}
var irFrameSource = mediaCapture.FrameSources[ExclusiveIrSourceInfo.Id];
var irPropertyGet = await irFrameSource.Controller.GetPropertyAsync(KS.PROPERTY_CAMERACONTROL_EXTENDED_FACEAUTH_MODE);
if (irPropertyGet.Status == MediaFrameSourceGetPropertyStatus.Success &&
irPropertyGet.Value is byte[])
{
var irProperty = KSCAMERA_EXTENDEDPROP.FromBytes(irPropertyGet.Value as byte[], 0);
UInt64 flags = 0u;
if ((irProperty.Header.Capability & KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_ALTERNATIVE_FRAME_ILLUMINATION) != 0)
{
flags = KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_ALTERNATIVE_FRAME_ILLUMINATION;
}
else if ((irProperty.Header.Capability & KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_BACKGROUND_SUBTRACTION) != 0)
{
flags = KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_BACKGROUND_SUBTRACTION;
}
if (flags != irProperty.Header.Flags)
{
irProperty.Header.Flags = flags;
var newProperty = irProperty.GetBytes();
var irPropertySet = await irFrameSource.Controller.SetPropertyAsync(KS.PROPERTY_CAMERACONTROL_EXTENDED_FACEAUTH_MODE, newProperty);
if (irPropertySet == MediaFrameSourceSetPropertyStatus.Success)
{
if (flags == KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_ALTERNATIVE_FRAME_ILLUMINATION)
{
AlternativeFrameIllumination = true;
}
else if (flags == KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_BACKGROUND_SUBTRACTION)
{
AlternativeFrameIllumination = false;
}
}
}
else
{
if (flags == KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_ALTERNATIVE_FRAME_ILLUMINATION)
{
AlternativeFrameIllumination = true;
}
else if (flags == KS.CAMERA_EXTENDEDPROP_FACEAUTH_MODE_BACKGROUND_SUBTRACTION)
{
AlternativeFrameIllumination = false;
}
}
}
}
finally
{ // TODO face mode will throw if the camera is already in face mode
}
}