mlib_VideoIDCT8x8_S16_S16_mediaLibmlib_VideoIDCT8x8_S16_S16_Q1_Mismatch(3MLIB)NAMEmlib_VideoIDCT8x8_S16_S16_Q1_Mismatch - inverse Discrete Cosine Trans‐
form
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_VideoIDCT8x8_S16_S16_Q1_Mismatch(
mlib_s16 block[64], const mlib_s16 coeffs[64]);
DESCRIPTION
The mlib_VideoIDCT8x8_S16_S16_Q1_Mismatch() function computes the
inverse IDCT in the inter mode.
This function is similar to mlib_VideoIDCT8x8_S16_S16_Q1() which should
only be used when coeffs[u][v] (u,v = 0...7) are non-zero only for u
and v less then 4. However, this function also allows element
coeffs[7][7] to be non-zero. The primary benefit of this modification
is that it can handle situations where coeffs[7][7] has been made non-
zero by MPEG mismatch-control, allowing a simplified version of the
IDCT to be undertaken for a much larger number of situations.
PARAMETERS
The function takes the following arguments:
block Pointer to an 8x8 motion-compensated block which is the dif‐
ference between the reference block and current block. block
must be 8-byte aligned.
coeffs Pointer to the input DCT coefficients. coeffs must be 8-byte
aligned. coeffs should be in S12 range or it should be
obtained from the corresponding forward DCT.
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_VideoIDCT8x8_S16_S16_Q1(3MLIB), attributes(5)SunOS 5.10mlib_VideoIDCT8x8_S16_S16_Q1_Mismatch(3MLIB)
