mlib_VideoIDCT_IEEE_S16_S16(3MLIB)

Name

mlib_VideoIDCT_IEEE_S16_S16 - IEEE-1180 compliant inverse Discrete Cosine Transform

Synopsis

cc [ flag... ] file... –lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_VideoIDCT_IEEE_S16_S16(mlib_s16 block[64],
     const mlib_s16 coeffs[64]);

Description

The mlib_VideoIDCT_IEEE_S16_S16() function computes the inverse DCT (called IDCT) for the output IDCT block of data type mlib_s16 and input DCT coefficients of data type mlib_s16. This function is guaranteed to be IEEE-1180 -compliant. The output of the IDCT routine is the difference between the current block and the reference block. The difference pixel can occupy nine bits and is represented as a 16-bit datum. The output must be added to the motion-compensated reference block in order to reconstruct the current block.

Parameters

The function takes the following arguments:

block

Pointer to an 8x8 motion-compensated block that is the difference between the reference block and the current block. block need not be 8-byte aligned.

coeffs

Pointer to the source DCT coefficients. coeffs need not be 8-byte aligned.

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_VideoIDCT8x8_S16_S16(3MLIB), mlib_VideoIDCT8x8_S16_S16_DC(3MLIB), mlib_VideoIDCT8x8_S16_S16_NA(3MLIB), mlib_VideoIDCT8x8_S16_S16_Q1(3MLIB), mlib_VideoIDCT8x8_U8_S16(3MLIB), mlib_VideoIDCT8x8_U8_S16_DC(3MLIB), mlib_VideoIDCT8x8_U8_S16_NA(3MLIB), mlib_VideoIDCT8x8_U8_S16_Q1(3MLIB), attributes(5)