mlib_VideoDCT8x8_S16_U8(3MmediaLib Library Functmlib_VideoDCT8x8_S16_U8(3MLIB)NAMEmlib_VideoDCT8x8_S16_U8 - forward Discrete Cosine Transform (DCT)
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_VideoDCT8x8_S16_U8(mlib_s16 coeffs[64],
const mlib_u8 *block, mlib_s32 stride);
DESCRIPTION
The mlib_VideoDCT8x8_S16_U8() 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.
The source and destination buffer addresses must be 8-byte aligned.
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 destination DCT coefficients. Note that coeffs
must be 8-byte aligned.
block Pointer to an 8x8 block in the current frame. Note that block
must be 8-byte aligned.
stride Stride in bytes between adjacent rows in the block. Note that
stride must be a multiple of eight.
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 │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmlib_VideoDCT2x2_S16_S16(3MLIB), mlib_VideoDCT4x4_S16_S16(3MLIB),
mlib_VideoDCT8x8_S16_S16_B10(3MLIB),
mlib_VideoDCT8x8_S16_S16_B10_NA(3MLIB),
mlib_VideoDCT8x8_S16_S16_B12(3MLIB), mlib_VideoDCT8x8_S16_U8_NA(3MLIB),
mlib_VideoDCT16x16_S16_S16(3MLIB),
mlib_VideoDCT16x16_S16_S16_B10(3MLIB), mlib_VideoDeQuantize_S16(3MLIB),
mlib_VideoDeQuantizeInit_S16(3MLIB), mlib_VideoQuantize_S16(3MLIB),
mlib_VideoQuantizeInit_S16(3MLIB), attributes(5)SunOS 5.10 2 Mar 2007 mlib_VideoDCT8x8_S16_U8(3MLIB)
