'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc.  All Rights Reserved 
.TH mlib_VideoDCT8x8_S16_U8_NA 3MLIB "2 Mar 2007" "SunOS 5.11" "mediaLib Library Functions"
.SH NAME
mlib_VideoDCT8x8_S16_U8_NA \- forward Discrete Cosine Transform (DCT)
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lmlib\fR [ \fIlibrary\fR... ]
#include <mlib.h>

\fBmlib_status\fR \fBmlib_VideoDCT8x8_S16_U8_NA\fR(\fBmlib_s16\fR \fIcoeffs[64]\fR,
     \fBconst mlib_u8 *\fR\fIblock\fR, \fBmlib_s32\fR \fIstride\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmlib_VideoDCT8x8_S16_U8_NA()\fR function computes the forward DCT for the destination DCT coefficients of data type mlib_s16 and source block of data type mlib_u8. The stride applies to the block that is part of the frame currently being encoded.
.sp
.LP
This function requires no special address alignment.
.sp
.LP
This function can be used in JPEG with 8-bit precision, or in MPEG for the intra mode.
.SH PARAMETERS
.sp
.LP
The function takes the following arguments:
.sp
.ne 2
.mk
.na
\fB\fIcoeffs\fR\fR
.ad
.RS 10n
.rt  
Pointer to the destination DCT coefficients.
.RE

.sp
.ne 2
.mk
.na
\fB\fIblock\fR\fR
.ad
.RS 10n
.rt  
Pointer to an 8x8 block in the current frame.
.RE

.sp
.ne 2
.mk
.na
\fB\fIstride\fR\fR
.ad
.RS 10n
.rt  
Stride in bytes between adjacent rows in the block.
.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_VideoDCT2x2_S16_S16\fR(3MLIB), \fBmlib_VideoDCT4x4_S16_S16\fR(3MLIB), \fBmlib_VideoDCT8x8_S16_S16_B10\fR(3MLIB), \fBmlib_VideoDCT8x8_S16_S16_B10_NA\fR(3MLIB), \fBmlib_VideoDCT8x8_S16_S16_B12\fR(3MLIB), \fBmlib_VideoDCT8x8_S16_U8\fR(3MLIB), \fBmlib_VideoDCT16x16_S16_S16\fR(3MLIB), \fBmlib_VideoDCT16x16_S16_S16_B10\fR(3MLIB), \fBmlib_VideoDeQuantize_S16\fR(3MLIB), \fBmlib_VideoDeQuantizeInit_S16\fR(3MLIB), \fBmlib_VideoQuantize_S16\fR(3MLIB), \fBmlib_VideoQuantizeInit_S16\fR(3MLIB), \fBattributes\fR(5)