mlib_VideoColorRGB2JFIFYCCmediaLib3Libmlib_VideoColorRGB2JFIFYCC444_S16(3MLIB)NAMEmlib_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 sup‐
posed 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:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmlib_VideoColorABGR2JFIFYCC444(3MLIB), mlib_VideoColorARGB2JFI‐
FYCC444(3MLIB), mlib_VideoColorRGB2JFIFYCC444(3MLIB), attributes(5)SunOS 5.10 23 Mmlib_VideoColorRGB2JFIFYCC444_S16(3MLIB)
