DecodeHuffmanPair

Decodes one code using specified table and gets two decoded values.

Syntax

IppStatus ippiDecodeHuffmanPair_1u16s(Ipp32u** ppBitStream, Ipp32s* pOffset, const IppVCHuffmanSpec_32s* pDecodeTable, Ipp8s* pFirst, Ipp16s* pSecond);

Parameters

ppBitStream	Double pointer to the current position in the bitstream.
pOffset	Pointer to offset between the bit that ppBitStream points to and the start of the code. pOffset may vary from zero to 31.
pDecodeTable	Pointer to the decoding table.
pFirst	Pointer to the first destination value.
pSecond	Pointer to the second destination value.

Description

This function is declared in the ippvc.h header file. The function ippiDecodeHuffmanPair_1u16s decodes one code from the bitstream using a specified table, sends the result (two values) to destination data, and resets the pointers to new positions (See example in Figure "Getting One Code From Bitstream"). The function uses the table derived by the HuffmanRunLevelTableInitAlloc function.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when at least one input pointer is NULL.
ippStsH263VLCCodeErr	Indicates an error in process of decoding.