mlib_VideoDCT8x8_S16_S16_B12(3MLIB)

Name

mlib_VideoDCT8x8_S16_S16_B12 - forward Discrete Cosine Transform (DCT)

Synopsis

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

mlib_status mlib_VideoDCT8x8_S16_S16_B12(
     mlib_s16 coeffs[64], const mlib_s16 block[64]);

Description

This function computes the forward DCT for the destination DCT coefficients of data type mlib_s16 and source block of data type mlib_s16. The source to the DCT routine can occupy up to 12 bits for each of its elements.

The source and destination buffer addresses must be 8-byte aligned.

This function can be used in JPEG with 12-bit precision.

Parameters

The function takes the following arguments:

coeffs

Pointer to the output DCT coefficients. Note that coeffs must be 8-byte aligned.

block

Pointer to an 8x8 block. Note that block must 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_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_U8(3MLIB), mlib_VideoDCT8x8_S16_U8_NA(3MLIB), mlib_VideoDCT16x16_S16_S16(3MLIB), mlib_VideoDCT16x16_S16_S16_B10(3MLIB), attributes(5)