Module utils

Structs§

CameraControl: This struct tells you everything about a particular KnownCameraControl.
CameraFormat: This is a convenience struct that holds all information about the format of a webcam stream. It consists of a Resolution, FrameFormat, and a frame rate(u8).
CameraInfo: Information about a Camera e.g. its name. description amd misc may contain information that may differ from backend to backend. Refer to each backend for details. index is a camera’s index given to it by (usually) the OS usually in the order it is known to the system.
RequestedFormat: A request to the camera for a valid CameraFormat
Resolution: Describes a Resolution. This struct consists of a Width and a Height value (x,y).
Note: the Ord implementation of this struct is flipped from highest to lowest.

ApiBackend: The list of known capture backends to the library.
CameraIndex: Describes the index of the camera.
ControlValueDescription: The values for a CameraControl.
ControlValueSetter: The setter for a control value
FrameFormat: Describes a frame format (i.e. how the bytes themselves are encoded). Often called FourCC.
KnownCameraControl: The list of known camera controls to the library.
These can control the picture brightness, etc.
Note that not all backends/devices support all these. Run supported_camera_controls() to see which ones can be set.
KnownCameraControlFlag: This tells you weather a KnownCameraControl is automatically managed by the OS/Driver or manually managed by you, the programmer.
RequestedFormatType: Tells the init function what camera format to pick.

all_known_camera_controls: All camera controls in an array.
buf_bgr_to_rgb
buf_mjpeg_to_rgb: Equivalent to mjpeg_to_rgb except with a destination buffer.
buf_nv12_to_rgb: Converts a YUYV 4:2:0 bi-planar (NV12) datastream to a RGB888 Stream and outputs it into a destination buffer. For further reading
buf_yuyv422_to_rgb: Same as yuyv422_to_rgb but with a destination buffer instead of a return Vec<u8>
color_frame_formats: Returns all the color frame formats
frame_formats: Returns all the frame formats
mjpeg_to_rgb: Converts a MJPEG stream of &[u8] into a Vec<u8> of RGB888. (R,G,B,R,G,B,…)
nv12_to_rgb: Converts a YUYV 4:2:0 bi-planar (NV12) datastream to a RGB888 Stream. For further reading
yuyv422_predicted_size: Returns the predicted size of the destination YUYV422 buffer.
yuyv422_to_rgb: Converts a YUYV 4:2:2 datastream to a RGB888 Stream. For further reading
yuyv444_to_rgb: Convert YCbCr 4:4:4 to a RGB888. For further reading
yuyv444_to_rgba: Convert YCbCr 4:4:4 to a RGBA8888. For further reading