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# mlib_VideoColorUYV444int_to_YUYV422int

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
Index Return to Main Contents

## NAME

mlib_VideoColorUYV444int_to_YUYV422int - convert UYV interleaved with subsampling

## SYNOPSIS

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

void mlib_VideoColorUYV444int_to_YUYV422int(mlib_u32 *YUYV,
const mlib_u8 *UYV,mlib_s32 w,mlib_s32 h,
mlib_s32 dlb, mlib_s32 slb);
```

## DESCRIPTION

The UYV pixel stream is broken apart and recombined into a YUYV pixel stream. All pixel components are 8-bit unsigned integers. The UYV buffer has dimensions w and h. Dimension w is assumed to be a multiple of 2. Adjacent U and V values are averaged to get the output U and V values. The sequence of values in the input stream is U[r][c], Y[r][c], V[r][c], U[r][c+1], Y[r][c+1], V[r][c+1], ...

The following equation is used:

```YUYV[r][c/2] = (Y[r][c]  << 24) |
(((U[r][c] + U[r][c+1]) / 2) << 16) |
(Y[r][c+1] << 8) |
(((V[r][c] + V[r][c+1]) / 2))
```

where r = 0, 1, 2, ..., h-1; and c = 0, 2, 4, ..., w-2.

## PARAMETERS

The function takes the following arguments:

YUYV

Pointer to output buffer.

UYV

Pointer to input buffer.

w

Image width in pixels.

h

Image height in lines.

dlb

Linebytes for output buffer.

slb

Linebytes for input buffer.

None.

## ATTRIBUTES

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

 ATTRIBUTE TYPE ATTRIBUTE VALUE Interface Stability Committed MT-Level

## SEE ALSO

mlib_VideoColorYUV444seq_to_YUYV422int(3MLIB), mlib_VideoColorYUV444int_to_YUYV422int(3MLIB), mlib_VideoColorYUV444seq_to_UYVY422int(3MLIB), mlib_VideoColorYUV444int_to_UYVY422int(3MLIB), mlib_VideoColorUYV444int_to_UYVY422int(3MLIB), attributes(5)

## Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:38:04 GMT, October 02, 2010