DecodeHuffmanSpecInitAlloc

Allocates memory and creates Huffman table in a format that is suitable for a decoder.

Syntax

IppStatus ippiDecodeHuffmanSpecInitAlloc_JPEG_8u(const Ipp8u* pListBits, const Ipp8u* pListVals, IppiDecodeHuffmanSpec** ppDecHuffSpec);

Parameters

pListBits	Pointer to Bits list.
pListVals	Pointer to Vals list.
ppDecHuffSpec	Pointer to the returned pointer to the Huffman table for the decoder.

Description

The function ippiDecodeHuffmanSpecInitAlloc_JPEG is declared in the ippj.h file. This function allocates memory and creates the Huffman table in a format that is suitable for a decoder. The function expects that Bits and Vals lists are supplied in the format specified in [ISO10918], Annex C, Huffman Table Specification. To generate the table, the function uses the procedure that is described in [ISO10918], Annex C.2, Conversion of HuffmanTables Specified in Interchange Format to Tables of Codes and Code Lengths .

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error condition if one or all of the specified pointers are NULL.
ippStsJPEGHuffTableErr	Indicates an error condition during the initialization of the table. It may happen when raw tables contain inadmissible values.