mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA(3MLIB) mediaLib Library Functions mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA(3MLIB)
NAME
mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA - dequantization and inverse Discrete Cosine Transform (IDCT)
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA(
mlib_u8 *block, const mlib_s16 coeffs[64],
const mlib_d64 dqtable[64], mlib_s32 stride);
DESCRIPTION
The mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA() function dequantizes the quantized DCT coefficients and then computes the inverse DCT. It's a
combination of mlib_VideoDeQuantize_S16() and mlib_VideoIDCT8x8_U8_S16_NA() 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:
block Pointer to an 8x8 block.
coeffs Pointer to the input quantized DCT coefficients.
dqtable Pointer to the dequantization table generated by mlib_VideoDeQuantizeInit_S16().
stride Stride in bytes between adjacent rows in the block.
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 ALSO
mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12(3MLIB), mlib_VideoDeQuantizeIDCT8x8_S16_S16_B12_NA(3MLIB), mlib_VideoDeQuantizeI-
DCT8x8_U8_S16(3MLIB), mlib_VideoDeQuantizeInit_S16(3MLIB), attributes(5)
SunOS 5.11 2 Mar 2007 mlib_VideoDeQuantizeIDCT8x8_U8_S16_NA(3MLIB)