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Diffstat (limited to 'libSBRdec/src/huff_dec.cpp')
-rw-r--r-- | libSBRdec/src/huff_dec.cpp | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libSBRdec/src/huff_dec.cpp b/libSBRdec/src/huff_dec.cpp new file mode 100644 index 0000000..1af3554 --- /dev/null +++ b/libSBRdec/src/huff_dec.cpp @@ -0,0 +1,62 @@ +/**************************************************************************** + + (C) Copyright Fraunhofer IIS (2004) + All Rights Reserved + + Please be advised that this software and/or program delivery is + Confidential Information of Fraunhofer and subject to and covered by the + + Fraunhofer IIS Software Evaluation Agreement + between Google Inc. and Fraunhofer + effective and in full force since March 1, 2012. + + You may use this software and/or program only under the terms and + conditions described in the above mentioned Fraunhofer IIS Software + Evaluation Agreement. Any other and/or further use requires a separate agreement. + + + This software and/or program is protected by copyright law and international + treaties. Any reproduction or distribution of this software and/or program, + or any portion of it, may result in severe civil and criminal penalties, and + will be prosecuted to the maximum extent possible under law. + + $Id$ + +*******************************************************************************/ +/*! + \file + \brief Huffman Decoder $Revision: 36841 $ +*/ + +#include "huff_dec.h" + +/***************************************************************************/ +/*! + \brief Decodes one huffman code word + + Reads bits from the bitstream until a valid codeword is found. + The table entries are interpreted either as index to the next entry + or - if negative - as the codeword. + + \return decoded value + + \author + +****************************************************************************/ +int +DecodeHuffmanCW (Huffman h, /*!< pointer to huffman codebook table */ + HANDLE_FDK_BITSTREAM hBs) /*!< Handle to Bitbuffer */ +{ + SCHAR index = 0; + int value, bit; + + while (index >= 0) { + bit = FDKreadBits (hBs, 1); + index = h[index][bit]; + } + + value = index+64; /* Add offset */ + + + return value; +} |