Classes
class	Compressor
	If compressing multiple JPEG images, use a compressor because it will re-use memory for a slight speed up. More...
struct	InputSource
	Input source for JPEG decompression manager. More...
struct	OutputSource
	Output source for JPEG compression manager. More...
Functions
CX_UTILS_DLL int	ConvertMJPEG2JPEG (const unsigned char mjpeg, const unsigned int mjpegSize, unsigned char jpeg, unsigned int jpegSize)
	Takes an MJPEG frame data, and converts to JPEG data.
CX_UTILS_DLL int	DecompressImage (const unsigned char jpeg, const unsigned int jpegSize, unsigned char image, unsigned short width, unsigned short height, unsigned char channels)
	Takes JPEG data inside of a buffer and decompresses it to another buffer which will store the raw image.
CX_UTILS_DLL int	CompressImage (const unsigned short width, const unsigned short height, const unsigned char channels, const unsigned char image, unsigned char jpeg, unsigned int jpegBufferSize, unsigned int *jpegSize, const int quality=-1)
	Compresses RAW image data to JPEG format.
void	InitSource (j_decompress_ptr cinfo)
boolean	FillInputBuffer (j_decompress_ptr cinfo)
void	SkipInputData (j_decompress_ptr cinfo, long num_bytes)
void	TerminateSource (j_decompress_ptr cinfo)
void	ErrorExit (j_common_ptr cinfo)
void	InitDestination (j_compress_ptr cinfo)
boolean	EmptyOutputBuffer (j_compress_ptr cinfo)
void	TerminateDestination (j_compress_ptr cinfo)

Function Documentation

int CxUtils::JPEG::CompressImage	(	const unsigned short	width,
		const unsigned short	height,
		const unsigned char	channels,
		const unsigned char *	image,
		unsigned char **	jpeg,
		unsigned int *	jpegBufferSize,
		unsigned int *	jpegSize,
		const int	quality = `-1`
	)

Compresses RAW image data to JPEG format.

Parameters:

[in]	image	Pointer to raw image data that needs to be compressed. Data must be in BGR channel format.
[in]	width	The width of the image.
[in]	height	The height of the image.
[in]	channels	The number of channels in the image.
[out]	jpeg	Pointer to buffer which will store resulting JPEG data. If NULL or too small this buffer will grow dynamically.
[out]	jpegBufferSize	The size of the buffer in bytes holding the compressed JPEG.
[out]	jpegSize	The size of the JPEG data inside the buffer in bytes.
[in]	quality	The compression quality. Set to -1 for default, 0 worst and 100 best (but larger size).

JSAMPLE row to store a single compressed row.

Physical row width in image buffer (width*channels).

Definition at line 523 of file jpeg.cpp.

int CxUtils::JPEG::ConvertMJPEG2JPEG	(	const unsigned char *	mjpeg,
		const unsigned int	mjpegSize,
		unsigned char **	jpeg,
		unsigned int *	jpegSize
	)

Takes an MJPEG frame data, and converts to JPEG data.

Parameters:

[in]	mjpeg	Pointer to MJPEG data.
[in]	mjpegSize	The size in bytes of the MJPEG data.
[out]	jpeg	Pointer to buffer which will store the result. If NULL or too small new memory will be allocated dynamically. Decompressed data will be in BGR format.
[out]	jpegSize	Pointer to output size of the new JPEG.

Definition at line 124 of file jpeg.cpp.

int CxUtils::JPEG::DecompressImage	(	const unsigned char *	jpeg,
		const unsigned int	jpegSize,
		unsigned char **	image,
		unsigned short *	width,
		unsigned short *	height,
		unsigned char *	channels
	)

Takes JPEG data inside of a buffer and decompresses it to another buffer which will store the raw image.

Parameters:

[in]	jpeg	Pointer to JPEG data.
[in]	jpegSize	The size in bytes of the JPEG data.
[out]	image	Pointer to buffer which will store the result. If NULL or too small new memory will be allocated dynamically. Decompressed data will be in BGR format.
[out]	width	The width of the image decompressed.
[out]	height	The height of the image decompressed.
[out]	channels	The number of channels in the decompressed image.

Definition at line 274 of file jpeg.cpp.

boolean CxUtils::JPEG::EmptyOutputBuffer ( j_compress_ptr cinfo )

Definition at line 448 of file jpeg.cpp.

void CxUtils::JPEG::ErrorExit ( j_common_ptr cinfo )

Definition at line 249 of file jpeg.cpp.

boolean CxUtils::JPEG::FillInputBuffer ( j_decompress_ptr cinfo )

Definition at line 201 of file jpeg.cpp.

void CxUtils::JPEG::InitDestination ( j_compress_ptr cinfo )

Definition at line 439 of file jpeg.cpp.

void CxUtils::JPEG::InitSource ( j_decompress_ptr cinfo )

Definition at line 191 of file jpeg.cpp.

void CxUtils::JPEG::SkipInputData	(	j_decompress_ptr	cinfo,
		long	num_bytes
	)

Definition at line 228 of file jpeg.cpp.

void CxUtils::JPEG::TerminateDestination ( j_compress_ptr cinfo )

Definition at line 474 of file jpeg.cpp.

void CxUtils::JPEG::TerminateSource ( j_decompress_ptr cinfo )

Definition at line 243 of file jpeg.cpp.

CxUtils::JPEG Namespace Reference