Tango::EncodedAttribute Class Reference

This class provides method to deal with Tango::DevEncoded attribute format. More...

#include "tango.h"

Public Member Functions
Constructors
Miscellaneous constructors
	EncodedAttribute ()
	Create a new EncodedAttribute object.
	EncodedAttribute (int buf_pool_size, bool serialization=false)
	Create a new EncodedAttribute object with a user defined buffer pool. More...
Destructor
Only one desctructor is defined for this class
	~EncodedAttribute ()
	The attribute desctructor.
Image Encoding Methods
void	encode_jpeg_gray8 (unsigned char *gray8, int width, int height, double quality)
	Encode a 8 bit grayscale image as JPEG format. More...
void	encode_jpeg_rgb32 (unsigned char *rgb32, int width, int height, double quality)
	Encode a 32 bit rgb color image as JPEG format. More...
void	encode_jpeg_rgb24 (unsigned char *rgb24, int width, int height, double quality)
	Encode a 24 bit rgb color image as JPEG format. More...
void	encode_gray8 (unsigned char *gray8, int width, int height)
	Encode a 8 bit grayscale image (no compression) More...
void	encode_gray16 (unsigned short *gray16, int width, int height)
	Encode a 16 bit grayscale image (no compression) More...
void	encode_rgb24 (unsigned char *rgb24, int width, int height)
	Encode a 24 bit color image (no compression) More...

Image Decoding Methods
void	decode_rgb32 (DeviceAttribute *attr, int *width, int *height, unsigned char **rgb32)
	Decode a color image (JPEG_RGB or RGB24) and returns a 32 bits RGB image. More...
void	decode_gray8 (DeviceAttribute *attr, int *width, int *height, unsigned char **gray8)
	Decode a 8 bits grayscale image (JPEG_GRAY8 or GRAY8) and returns a 8 bits gray scale image. More...
void	decode_gray16 (DeviceAttribute *attr, int *width, int *height, unsigned short **gray16)
	Decode a 16 bits grayscale image (GRAY16) and returns a 16 bits gray scale image. More...

Detailed Description

This class provides method to deal with Tango::DevEncoded attribute format.

Constructor & Destructor Documentation

EncodedAttribute()

Tango::EncodedAttribute::EncodedAttribute	(	int	buf_pool_size,
		bool	serialization = false
	)

Create a new EncodedAttribute object with a user defined buffer pool.

This constructor allows the user to define the size of the buffer pool used to store the encoded images. This buffer pool is managed as a circular pool. A different buffer is used each time an image is encoded. The last used buffer is then passed to the attribute with the attribute::set_value() method

Parameters

buf_pool_size	Buffer pool size
serialization	Set to true if the instance manage the data buffer serialization

Member Function Documentation

decode_gray16()

void Tango::EncodedAttribute::decode_gray16	(	DeviceAttribute *	attr,
		int *	width,
		int *	height,
		unsigned short **	gray16
	)

Decode a 16 bits grayscale image (GRAY16) and returns a 16 bits gray scale image.

Throws DevFailed in case of failure.

Parameters

attr	DeviceAttribute that contains the image
width	Width of the image
height	Height of the image
gray16	Image (memory allocated by the function)

decode_gray8()

void Tango::EncodedAttribute::decode_gray8	(	DeviceAttribute *	attr,
		int *	width,
		int *	height,
		unsigned char **	gray8
	)

Decode a 8 bits grayscale image (JPEG_GRAY8 or GRAY8) and returns a 8 bits gray scale image.

Throws DevFailed in case of failure.

Parameters

attr	DeviceAttribute that contains the image
width	Width of the image
height	Height of the image
gray8	Image (memory allocated by the function)

decode_rgb32()

void Tango::EncodedAttribute::decode_rgb32	(	DeviceAttribute *	attr,
		int *	width,
		int *	height,
		unsigned char **	rgb32
	)

Decode a color image (JPEG_RGB or RGB24) and returns a 32 bits RGB image.

Throws DevFailed in case of failure.

Parameters

attr	DeviceAttribute that contains the image
width	Width of the image
height	Height of the image
rgb32	Image (memory allocated by the function)

encode_gray16()

void Tango::EncodedAttribute::encode_gray16	(	unsigned short *	gray16,
		int	width,
		int	height
	)

Encode a 16 bit grayscale image (no compression)

Parameters

gray16	Array of 16bit gray sample
width	The image width
height	The image height

encode_gray8()

void Tango::EncodedAttribute::encode_gray8	(	unsigned char *	gray8,
		int	width,
		int	height
	)

Encode a 8 bit grayscale image (no compression)

Parameters

gray8	Array of 8bit gray sample
width	The image width
height	The image height

encode_jpeg_gray8()

void Tango::EncodedAttribute::encode_jpeg_gray8	(	unsigned char *	gray8,
		int	width,
		int	height,
		double	quality
	)

Encode a 8 bit grayscale image as JPEG format.

Parameters

gray8	Array of 8bit gray sample
width	The image width
height	The image height
quality	Quality of JPEG (0=poor quality 100=max quality)

encode_jpeg_rgb24()

void Tango::EncodedAttribute::encode_jpeg_rgb24	(	unsigned char *	rgb24,
		int	width,
		int	height,
		double	quality
	)

Encode a 24 bit rgb color image as JPEG format.

Parameters

rgb24	Array of 32bit RGB sample (RGBRGB...)
width	The image width
height	The image height
quality	Quality of JPEG (0=poor quality 100=max quality)

encode_jpeg_rgb32()

void Tango::EncodedAttribute::encode_jpeg_rgb32	(	unsigned char *	rgb32,
		int	width,
		int	height,
		double	quality
	)

Encode a 32 bit rgb color image as JPEG format.

Parameters

rgb32	Array of 32bit RGB sample (RGB0RGB0...)
width	The image width
height	The image height
quality	Quality of JPEG (0=poor quality 100=max quality)

encode_rgb24()

void Tango::EncodedAttribute::encode_rgb24	(	unsigned char *	rgb24,
		int	width,
		int	height
	)

Encode a 24 bit color image (no compression)

Parameters

rgb24	Array of 24bit RGB sample
width	The image width
height	The image height

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The documentation for this class was generated from the following file:

• encoded_attribute.h