/// <summary>
/// Query controls value from the video device.
/// </summary>
/// <param name="type">The type of a video device's control.</param>
/// <returns>The default and current values of a video device's control.</returns>
public override VideoDeviceValue GetVideoDeviceValue(VideoDeviceValueType type)
{
Initialize();
// Get default value
InteropVideodev2.v4l2_queryctrl query = new InteropVideodev2.v4l2_queryctrl
{
id = type
};
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_QUERYCTRL, ref query);
// Get current value
InteropVideodev2.v4l2_control ctrl = new InteropVideodev2.v4l2_control
{
id = type,
};
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_G_CTRL, ref ctrl);
return(new VideoDeviceValue(
type.ToString(),
query.minimum,
query.maximum,
query.step,
query.default_value,
ctrl.value));
}
private unsafe void SetVideoConnectionSettings()
{
FillVideoConnectionSettings();
// Set capture format
InteropVideodev2.v4l2_format format = new InteropVideodev2.v4l2_format
{
type = InteropVideodev2.v4l2_buf_type.V4L2_BUF_TYPE_VIDEO_CAPTURE,
fmt = new InteropVideodev2.fmt
{
pix = new InteropVideodev2.v4l2_pix_format
{
width = Settings.CaptureSize.Width,
height = Settings.CaptureSize.Height,
pixelformat = Settings.PixelFormat
}
}
};
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_FMT, ref format);
// Set exposure type
InteropVideodev2.v4l2_control ctrl = new InteropVideodev2.v4l2_control
{
id = VideoDeviceValueType.ExposureType,
value = (int)Settings.ExposureType
};
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set exposure time
// If exposure type is auto, this field is invalid
ctrl.id = VideoDeviceValueType.ExposureTime;
ctrl.value = Settings.ExposureTime;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set brightness
ctrl.id = VideoDeviceValueType.Brightness;
ctrl.value = Settings.Brightness;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set contrast
ctrl.id = VideoDeviceValueType.Contrast;
ctrl.value = Settings.Contrast;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set saturation
ctrl.id = VideoDeviceValueType.Saturation;
ctrl.value = Settings.Saturation;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set sharpness
ctrl.id = VideoDeviceValueType.Sharpness;
ctrl.value = Settings.Sharpness;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set gain
ctrl.id = VideoDeviceValueType.Gain;
ctrl.value = Settings.Gain;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set gamma
ctrl.id = VideoDeviceValueType.Gamma;
ctrl.value = Settings.Gamma;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set power line frequency
ctrl.id = VideoDeviceValueType.PowerLineFrequency;
ctrl.value = (int)Settings.PowerLineFrequency;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set white balance effect
ctrl.id = VideoDeviceValueType.WhiteBalanceEffect;
ctrl.value = (int)Settings.WhiteBalanceEffect;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set white balance temperature
ctrl.id = VideoDeviceValueType.WhiteBalanceTemperature;
ctrl.value = Settings.WhiteBalanceTemperature;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set color effect
ctrl.id = VideoDeviceValueType.ColorEffect;
ctrl.value = (int)Settings.ColorEffect;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set scene mode
ctrl.id = VideoDeviceValueType.SceneMode;
ctrl.value = (int)Settings.SceneMode;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set rotate
ctrl.id = VideoDeviceValueType.Rotate;
ctrl.value = Settings.Rotate;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set horizontal flip
ctrl.id = VideoDeviceValueType.HorizontalFlip;
ctrl.value = Settings.HorizontalFlip ? 1 : 0;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
// Set vertical flip
ctrl.id = VideoDeviceValueType.VerticalFlip;
ctrl.value = Settings.VerticalFlip ? 1 : 0;
V4l2Struct(InteropVideodev2.V4l2Request.VIDIOC_S_CTRL, ref ctrl);
}
