mlib_VideoColorRGB2JFIFYCC444_S16

- RGB to JFIF YCbCr color conversion

Synopsis

cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_VideoColorRGB2JFIFYCC444_S16(mlib_s16 *y, mlib_s16 *cb,
     mlib_s16 *cr, const mlib_s16 *rgb, mlib_s32 n);

Description

The mlib_VideoColorRGB2JFIFYCC444_S16() function performs color space conversion from RGB to YCbCr when used in the JPEG File Interchange Format (JFIF).

Both the input RGB components and the output YCbCr components are supposed to be in the range of [0, 4095].

The following equation is used:

Y  =  0.29900 * R + 0.58700 * G + 0.11400 * B
Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B  + 2048
Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B  + 2048

Parameters

The function takes the following arguments:

y

Pointer to destination Y component row. y must be 8-byte aligned.

cb

Pointer to destination Cb component row. cb must be 8-byte aligned.

cr

Pointer to destination Cr component row. cr must be 8-byte aligned.

rgb

Pointer to source RGB multi-component row. rgb must be 8-byte aligned.

n

Length of Y component row. The length of Cb and Cr component rows must be n. The length of the RGB multi-component row must be 3*n.

Return Values

The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

mlib_VideoColorABGR2JFIFYCC444(3MLIB), mlib_VideoColorARGB2JFIFYCC444(3MLIB), mlib_VideoColorRGB2JFIFYCC444(3MLIB), attributes(5)