diff options
Diffstat (limited to 'core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp')
| -rw-r--r-- | core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp | 47 |
1 files changed, 22 insertions, 25 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp index 61a45bebae..cbbe6af70e 100644 --- a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp +++ b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp @@ -8,47 +8,44 @@ #include "JBig2_Define.h" -CJBig2_HuffmanDecoder::CJBig2_HuffmanDecoder(CJBig2_BitStream* pStream) { - m_pStream = pStream; +CJBig2_HuffmanDecoder::CJBig2_HuffmanDecoder(CJBig2_BitStream* pStream) + : m_pStream(pStream) { } + CJBig2_HuffmanDecoder::~CJBig2_HuffmanDecoder() {} + int CJBig2_HuffmanDecoder::decodeAValue(CJBig2_HuffmanTable* pTable, int* nResult) { - int i; int nVal = 0; int nBits = 0; - FX_DWORD nTmp; while (1) { - if (m_pStream->read1Bit(&nTmp) == -1) { + FX_DWORD nTmp; + if (m_pStream->read1Bit(&nTmp) == -1) return -1; - } + nVal = (nVal << 1) | nTmp; - nBits++; - for (i = 0; i < pTable->NTEMP; i++) { + ++nBits; + for (FX_DWORD i = 0; i < pTable->NTEMP; ++i) { if ((pTable->PREFLEN[i] == nBits) && (pTable->CODES[i] == nVal)) { - if ((pTable->HTOOB == 1) && (i == pTable->NTEMP - 1)) { + if ((pTable->HTOOB == 1) && (i == pTable->NTEMP - 1)) return JBIG2_OOB; - } - if (m_pStream->readNBits(pTable->RANGELEN[i], &nTmp) == -1) { + + if (m_pStream->readNBits(pTable->RANGELEN[i], &nTmp) == -1) return -1; - } + if (pTable->HTOOB) { - if (i == pTable->NTEMP - 3) { + if (i == pTable->NTEMP - 3) *nResult = pTable->RANGELOW[i] - nTmp; - return 0; - } else { + else *nResult = pTable->RANGELOW[i] + nTmp; - return 0; - } - } else { - if (i == pTable->NTEMP - 2) { - *nResult = pTable->RANGELOW[i] - nTmp; - return 0; - } else { - *nResult = pTable->RANGELOW[i] + nTmp; - return 0; - } + return 0; } + + if (i == pTable->NTEMP - 2) + *nResult = pTable->RANGELOW[i] - nTmp; + else + *nResult = pTable->RANGELOW[i] + nTmp; + return 0; } } } |