mediaLib Library Functions
mlibVideoDCT8x8QuantizeS16U8NA(3MLIB)
NAME
mlibVideoDCT8x8QuantizeS16U8NA - forward Discrete Cosine
Transform (DCT) and quantization
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include
mlibstatus mlibVideoDCT8x8QuantizeS16U8NA(
mlibs16 coeffs[64], const mlibu8 *block,
const mlibd64 dqtable[64], mlibs32 stride);
DESCRIPTION
The mlibVideoDCT8x8QuantizeS16U8NA() function computes
the forward DCT and then quantizes the DCT coefficients.
It's a combination of mlibVideoDCT8x8S16U8NA() and
mlibVideoQuantizeS16() for better performance.
This function requires no special address alignment.
This function can be used in JPEG with 8-bit precision, or
in MPEG for the intra mode.
PARAMETERS
The function takes the following arguments:
coeffs Pointer to the quantized DCT coefficients.
block Pointer to an 8x8 block.
dqtable Pointer to the quantization table generated by
mlibVideoQuantizeInitS16().
stride Stride in bytes between adjacent rows in the
block.
RETURN VALUES
The function returns MLIBSUCES if successful. Otherwise
it returns MLIBFAILURE.
ATRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
SunOS 5.11 Last change: 2 Mar 2007 1
mediaLib Library Functions
mlibVideoDCT8x8QuantizeS16U8NA(3MLIB)
ATRIBUTE TYPE ATRIBUTE VALUE
Interface Stability Committed
MT-Level MT-Safe
SEE ALSO
mlibVideoDCT8x8QuantizeS16S16B12(3MLIB),
mlibVideoDCT8x8QuantizeS16S16B12NA(3MLIB),
mlibVideoDCT8x8QuantizeS16U8(3MLIB),
mlibVideoQuantizeInitS16(3MLIB), attributes(5)
SunOS 5.11 Last change: 2 Mar 2007 2
mediaLib Library Functions
mlibVideoDCT8x8QuantizeS16U8NA(3MLIB)
SunOS 5.11 Last change: 2 Mar 2007 3
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