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Man page of mlib_VideoColorRGB2JFIFYCC444
mlib_VideoColorRGB2JFIFYCC444
Section: mediaLib Library Functions (3MLIB)
Updated: 23 May 2007
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NAME
mlib_VideoColorRGB2JFIFYCC444 - RGB to JFIF YCbCr color conversion
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_VideoColorRGB2JFIFYCC444(mlib_u8 *y, mlib_u8 *cb,
mlib_u8 *cr, const mlib_u8 *rgb, mlib_s32 n);
DESCRIPTION
The mlib_VideoColorRGB2JFIFYCC444() function performs color space conversion from RGB to YCbCr when used in the JPEG File Interchange Format (JFIF).
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 + 128
Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + 128
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 |
|
SEE ALSO
mlib_VideoColorABGR2JFIFYCC444(3MLIB),
mlib_VideoColorARGB2JFIFYCC444(3MLIB),
mlib_VideoColorRGB2JFIFYCC444_S16(3MLIB),
attributes(5)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- PARAMETERS
-
- RETURN VALUES
-
- ATTRIBUTES
-
- SEE ALSO
-
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