Content-type: text/html Man page of mlib_VideoDCT8x8_S16_U8

mlib_VideoDCT8x8_S16_U8

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
Index Return to Main Contents
 

NAME

mlib_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 TYPEATTRIBUTE VALUE

Interface StabilityCommitted

MT-Level

 

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_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)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:37:56 GMT, October 02, 2010