'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc.  All Rights Reserved 
.TH mlib_VideoP64Decimate_U8_U8 3MLIB "2 Mar 2007" "SunOS 5.11" "mediaLib Library Functions"
.SH NAME
mlib_VideoP64Decimate_U8_U8 \- averages the source raster image over 2x2 blocks and writes the results to the destination raster image
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lmlib\fR [ \fIlibrary\fR... ]
#include <mlib.h>

\fBmlib_status\fR \fBmlib_VideoP64Decimate_U8_U8\fR(\fBmlib_u8 *\fR\fIdst\fR,
     \fBconst mlib_u8 *\fR\fIsrc\fR, \fBmlib_s32\fR \fIwidth\fR, \fBmlib_s32\fR \fIheight\fR,
     \fBmlib_s32\fR \fIdst_stride\fR, \fBmlib_s32\fR \fIsrc_stride\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmlib_VideoP64Decimate_U8_U8()\fR function averages the source raster image over 2x2 blocks and writes the results to the destination raster image. This function is used when the remote side is only capable of QCIF and our scanned image is source to the encoder in CIF format.
.SH PARAMETERS
.sp
.LP
The function takes the following arguments:
.sp
.ne 2
.mk
.na
\fB\fIdst\fR\fR
.ad
.RS 14n
.rt  
Pointer to the destination raster image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIsrc\fR\fR
.ad
.RS 14n
.rt  
Pointer to the source raster image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIwidth\fR\fR
.ad
.RS 14n
.rt  
Width of the image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIheight\fR\fR
.ad
.RS 14n
.rt  
Height of the image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIdst_stride\fR\fR
.ad
.RS 14n
.rt  
Stride, in bytes, between adjacent rows in the destination image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIsrc_stride\fR\fR
.ad
.RS 14n
.rt  
Stride, in bytes, between adjacent rows in the source image.
.RE

.SH RETURN VALUES
.sp
.LP
The function returns \fBMLIB_SUCCESS\fR if successful. Otherwise it returns \fBMLIB_FAILURE\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBmlib_VideoAddBlock_U8_S16\fR(3MLIB), \fBmlib_VideoCopyRef_S16_U8\fR(3MLIB), \fBmlib_VideoCopyRef_S16_U8_16x16\fR(3MLIB), \fBmlib_VideoCopyRef_U8_U8_16x16\fR(3MLIB), \fBmlib_VideoCopyRefAve_U8_U8_16x16\fR(3MLIB), \fBmlib_VideoH263OverlappedMC_S16_U8\fR(3MLIB), \fBmlib_VideoH263OverlappedMC_U8_U8\fR(3MLIB), \fBmlib_VideoInterpAveX_U8_U8\fR(3MLIB), \fBmlib_VideoInterpAveX_U8_U8_16x16\fR(3MLIB), \fBmlib_VideoInterpAveXY_U8_U8\fR(3MLIB), \fBmlib_VideoInterpAveXY_U8_U8_16x16\fR(3MLIB), \fBmlib_VideoInterpAveY_U8_U8\fR(3MLIB), \fBmlib_VideoInterpAveY_U8_U8_16x16\fR(3MLIB), \fBmlib_VideoInterpX_S16_U8\fR(3MLIB), \fBmlib_VideoInterpX_S16_U8_16x16\fR(3MLIB), \fBmlib_VideoInterpX_U8_U8\fR(3MLIB), \fBmlib_VideoInterpXY_S16_U8\fR(3MLIB), \fBmlib_VideoInterpXY_S16_U8_16x16\fR(3MLIB), \fBmlib_VideoInterpXY_U8_U8\fR(3MLIB), \fBmlib_VideoInterpXY_U8_U8_16x16\fR(3MLIB), \fBmlib_VideoInterpY_S16_U8\fR(3MLIB), \fBmlib_VideoInterpY_S16_U8_16x16\fR(3MLIB), \fBmlib_VideoInterpY_U8_U8\fR(3MLIB), \fBmlib_VideoInterpY_U8_U8_16x16\fR(3MLIB), mlib_VideoP64Decimate_U8_U8(3MLIB), \fBmlib_VideoP64Loop_S16_U8\fR(3MLIB), \fBmlib_VideoP64Loop_U8_U8\fR(3MLIB), \fBmlib_VideoP64Loop_S16_U8\fR(3MLIB), \fBmlib_VideoP64Loop_U8_U8\fR(3MLIB), \fBattributes\fR(5)