QuantInvTableInit

Prepares quantization tables suitable for fast decoding.

Syntax

IppStatus ippiQuantInvTableInit_JPEG_8u16u(const Ipp8u* pQuantRawTable, Ipp16u* pQuantInvTable);

Parameters

pQuantRawTable	Pointer to the raw quantization table.
pQuantInvTable	Pointer to the quantization table for decoding.

Description

The function ippiQuantInvTableInit_JPEG is declared in the ippj.h file. This function prepares a quantization table for fast decoding. It also performs reordering transformation that converts the zigzag sequence of table elements to conventional order (left-to-right, top-to-bottom) that is more suitable for a decoder. See [ISO10918], Annex A.3.6, Zig-zag Sequence for more information on zigzag order.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error condition if one or both of the specified pointers are NULL.