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usb_cam::formats::UYVY2RGB

Inherits from usb_cam::formats::pixel_format_base

Public Functions

Name
virtual void convert(const char & src, char & dest, const int & bytes_used) override
In this format each four bytes is two pixels. Each four bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr belong to both pixels. As you can see, the Cr and Cb components have half the horizontal resolution of the Y component. V4L2_PIX_FMT_UYVY is known in the Windows environment as YUY2.
UYVY2RGB(const format_arguments_t & args =format_arguments_t())

Additional inherited members

Public Functions inherited from usb_cam::formats::pixel_format_base

Name
std::string v4l2_str()
String value of V4L2 capture pixel format.
uint32_t v4l2()
Integer value of V4L2 capture pixel format.
std::string ros()
Name of output pixel (encoding) format to ROS.
bool requires_conversion()
True if the current pixel format requires a call to the convert method Used in the usb_cam library logic to determine if a plain memcopy call can be used instead of a call to the convert method of this class.
pixel_format_base(std::string name, uint32_t v4l2, std::string ros, uint8_t channels, uint8_t bit_depth, bool requires_conversion)
std::string name()
Name of pixel format. Used in the parameters file to select this format.
bool is_mono()
Returns if the final output format is monocolor (gray) Copied from: https://github.com/ros2/common_interfaces/blob/rolling/sensor_msgs/include/sensor_msgs/image_encodings.hpp.
bool is_color()
Returns if the final output format is color Copied from: https://github.com/ros2/common_interfaces/blob/rolling/sensor_msgs/include/sensor_msgs/image_encodings.hpp.
bool is_bayer()
Returns if the final output format is bayer Copied from: https://github.com/ros2/common_interfaces/blob/rolling/sensor_msgs/include/sensor_msgs/image_encodings.hpp.
bool has_alpha()
Returns if the final output format has an alpha value Copied from: https://github.com/ros2/common_interfaces/blob/rolling/sensor_msgs/include/sensor_msgs/image_encodings.hpp.
uint8_t channels()
Number of channels (e.g. bytes) per pixel.
uint8_t byte_depth()
Number of bytes per channel.
uint8_t bit_depth()
Number for bit depth of image.

Protected Attributes inherited from usb_cam::formats::pixel_format_base

Name
uint32_t m_v4l2
Integer correspoding to a specific V4L2_PIX_FMT_* constant See linux/videodev2.h for a list of all possible values for here.
std::string m_ros
This should match ROS encoding string See sensor_msgs/image_encodings.hpp for corresponding possible values. Copy of those values are stored in [usb_cam/constants.hpp]
bool m_requires_conversion
boolean whether or not the current format requires a call to convert. Setting this to true requires that the virtual convert method is implemented.
std::string m_name
Unique name for this pixel format.
uint8_t m_channels
Number of channels (aka bytes per pixel) of output (ROS format above)
uint8_t m_bit_depth
Bitdepth of output (ROS format above)

Public Functions Documentation

function convert

inline virtual void convert(
    const char *& src,
    char *& dest,
    const int & bytes_used
) override

In this format each four bytes is two pixels. Each four bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr belong to both pixels. As you can see, the Cr and Cb components have half the horizontal resolution of the Y component. V4L2_PIX_FMT_UYVY is known in the Windows environment as YUY2.

Reimplements: usb_cam::formats::pixel_format_base::convert

Source: https://www.linuxtv.org/downloads/v4l-dvb-apis-old/V4L2-PIX-FMT-YUYV.html

function UYVY2RGB

inline explicit UYVY2RGB(
    const format_arguments_t & args =format_arguments_t()
)

Updated on 2024-06-22 at 03:15:44 +0000