diff options
author | Lei Zhang <thestig@chromium.org> | 2015-10-07 11:12:06 -0700 |
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committer | Lei Zhang <thestig@chromium.org> | 2015-10-07 11:12:06 -0700 |
commit | a0f2b67bd659e3f1780edfac56d8754bca685d5f (patch) | |
tree | 02309e03c5b3ca11e7eeaa7210f7397ba5c1bb33 /core/src/fxcodec | |
parent | 80aa8c26887d98f654a9eecf7298663656cfc40f (diff) | |
download | pdfium-a0f2b67bd659e3f1780edfac56d8754bca685d5f.tar.xz |
Stop inlining CJBig2_BitStream.
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1393823002 .
Diffstat (limited to 'core/src/fxcodec')
-rw-r--r-- | core/src/fxcodec/jbig2/JBig2_BitStream.cpp | 178 | ||||
-rw-r--r-- | core/src/fxcodec/jbig2/JBig2_BitStream.h | 280 | ||||
-rw-r--r-- | core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp | 3 | ||||
-rw-r--r-- | core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp | 1 |
4 files changed, 204 insertions, 258 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_BitStream.cpp b/core/src/fxcodec/jbig2/JBig2_BitStream.cpp new file mode 100644 index 0000000000..4a4ed992c7 --- /dev/null +++ b/core/src/fxcodec/jbig2/JBig2_BitStream.cpp @@ -0,0 +1,178 @@ +// Copyright 2015 PDFium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com + +#include "JBig2_BitStream.h" + +#include <algorithm> + +CJBig2_BitStream::CJBig2_BitStream(const uint8_t* pBuffer, FX_DWORD dwLength) + : m_pBuf(pBuffer), m_dwLength(dwLength), m_dwByteIdx(0), m_dwBitIdx(0) { + if (m_dwLength > 256 * 1024 * 1024) { + m_dwLength = 0; + m_pBuf = nullptr; + } +} + +CJBig2_BitStream::~CJBig2_BitStream() { +} + +int32_t CJBig2_BitStream::readNBits(FX_DWORD dwBits, FX_DWORD* dwResult) { + FX_DWORD dwBitPos = getBitPos(); + if (dwBitPos > LengthInBits()) + return -1; + + *dwResult = 0; + if (dwBitPos + dwBits <= LengthInBits()) + dwBitPos = dwBits; + else + dwBitPos = LengthInBits() - dwBitPos; + + for (; dwBitPos > 0; --dwBitPos) { + *dwResult = + (*dwResult << 1) | ((m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01); + AdvanceBit(); + } + return 0; +} + +int32_t CJBig2_BitStream::readNBits(FX_DWORD dwBits, int32_t* nResult) { + FX_DWORD dwBitPos = getBitPos(); + if (dwBitPos > LengthInBits()) + return -1; + + *nResult = 0; + if (dwBitPos + dwBits <= LengthInBits()) + dwBitPos = dwBits; + else + dwBitPos = LengthInBits() - dwBitPos; + + for (; dwBitPos > 0; --dwBitPos) { + *nResult = + (*nResult << 1) | ((m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01); + AdvanceBit(); + } + return 0; +} + +int32_t CJBig2_BitStream::read1Bit(FX_DWORD* dwResult) { + if (!IsInBound()) + return -1; + + *dwResult = (m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01; + AdvanceBit(); + return 0; +} + +int32_t CJBig2_BitStream::read1Bit(FX_BOOL* bResult) { + if (!IsInBound()) + return -1; + + *bResult = (m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01; + AdvanceBit(); + return 0; +} + +int32_t CJBig2_BitStream::read1Byte(uint8_t* cResult) { + if (!IsInBound()) + return -1; + + *cResult = m_pBuf[m_dwByteIdx]; + ++m_dwByteIdx; + return 0; +} + +int32_t CJBig2_BitStream::readInteger(FX_DWORD* dwResult) { + if (m_dwByteIdx + 3 >= m_dwLength) + return -1; + + *dwResult = (m_pBuf[m_dwByteIdx] << 24) | (m_pBuf[m_dwByteIdx + 1] << 16) | + (m_pBuf[m_dwByteIdx + 2] << 8) | m_pBuf[m_dwByteIdx + 3]; + m_dwByteIdx += 4; + return 0; +} + +int32_t CJBig2_BitStream::readShortInteger(FX_WORD* dwResult) { + if (m_dwByteIdx + 1 >= m_dwLength) + return -1; + + *dwResult = (m_pBuf[m_dwByteIdx] << 8) | m_pBuf[m_dwByteIdx + 1]; + m_dwByteIdx += 2; + return 0; +} + +void CJBig2_BitStream::alignByte() { + if (m_dwBitIdx != 0) { + ++m_dwByteIdx; + m_dwBitIdx = 0; + } +} + +uint8_t CJBig2_BitStream::getCurByte() const { + return IsInBound() ? m_pBuf[m_dwByteIdx] : 0; +} + +void CJBig2_BitStream::incByteIdx() { + if (IsInBound()) + ++m_dwByteIdx; +} + +uint8_t CJBig2_BitStream::getCurByte_arith() const { + return IsInBound() ? m_pBuf[m_dwByteIdx] : 0xFF; +} + +uint8_t CJBig2_BitStream::getNextByte_arith() const { + return m_dwByteIdx + 1 < m_dwLength ? m_pBuf[m_dwByteIdx + 1] : 0xFF; +} + +FX_DWORD CJBig2_BitStream::getOffset() const { + return m_dwByteIdx; +} + +void CJBig2_BitStream::setOffset(FX_DWORD dwOffset) { + m_dwByteIdx = std::min(dwOffset, m_dwLength); +} + +FX_DWORD CJBig2_BitStream::getBitPos() const { + return (m_dwByteIdx << 3) + m_dwBitIdx; +} + +void CJBig2_BitStream::setBitPos(FX_DWORD dwBitPos) { + m_dwByteIdx = dwBitPos >> 3; + m_dwBitIdx = dwBitPos & 7; +} + +const uint8_t* CJBig2_BitStream::getBuf() const { + return m_pBuf; +} + +const uint8_t* CJBig2_BitStream::getPointer() const { + return m_pBuf + m_dwByteIdx; +} + +void CJBig2_BitStream::offset(FX_DWORD dwOffset) { + m_dwByteIdx += dwOffset; +} + +FX_DWORD CJBig2_BitStream::getByteLeft() const { + return m_dwLength - m_dwByteIdx; +} + +void CJBig2_BitStream::AdvanceBit() { + if (m_dwBitIdx == 7) { + ++m_dwByteIdx; + m_dwBitIdx = 0; + } else { + ++m_dwBitIdx; + } +} + +bool CJBig2_BitStream::IsInBound() const { + return m_dwByteIdx < m_dwLength; +} + +FX_DWORD CJBig2_BitStream::LengthInBits() const { + return m_dwLength << 3; +} diff --git a/core/src/fxcodec/jbig2/JBig2_BitStream.h b/core/src/fxcodec/jbig2/JBig2_BitStream.h index 85c992f4ff..9a3d8b0a18 100644 --- a/core/src/fxcodec/jbig2/JBig2_BitStream.h +++ b/core/src/fxcodec/jbig2/JBig2_BitStream.h @@ -4,287 +4,51 @@ // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com -#ifndef _JBIG2_BIT_STREAM_H_ -#define _JBIG2_BIT_STREAM_H_ +#ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ +#define CORE_SRC_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ -#include "JBig2_Define.h" +#include "../../../include/fxcrt/fx_basic.h" class CJBig2_BitStream { public: CJBig2_BitStream(const uint8_t* pBuffer, FX_DWORD dwLength); - - CJBig2_BitStream(CJBig2_BitStream& bs); - ~CJBig2_BitStream(); + // TODO(thestig): readFoo() should return bool. int32_t readNBits(FX_DWORD nBits, FX_DWORD* dwResult); - int32_t readNBits(FX_DWORD nBits, int32_t* nResult); - int32_t read1Bit(FX_DWORD* dwResult); - int32_t read1Bit(FX_BOOL* bResult); - int32_t read1Byte(uint8_t* cResult); - int32_t readInteger(FX_DWORD* dwResult); - int32_t readShortInteger(FX_WORD* wResult); - void alignByte(); - - void align4Byte(); - - uint8_t getAt(FX_DWORD dwOffset); - - uint8_t getCurByte(); - - uint8_t getNextByte(); - - int32_t incByteIdx(); - - uint8_t getCurByte_arith(); - - uint8_t getNextByte_arith(); - - FX_DWORD getOffset(); - + uint8_t getCurByte() const; + void incByteIdx(); + uint8_t getCurByte_arith() const; + uint8_t getNextByte_arith() const; + FX_DWORD getOffset() const; void setOffset(FX_DWORD dwOffset); - - FX_DWORD getBitPos(); - + FX_DWORD getBitPos() const; void setBitPos(FX_DWORD dwBitPos); - - const uint8_t* getBuf(); - - FX_DWORD getLength() { return m_dwLength; } - - const uint8_t* getPointer(); - + const uint8_t* getBuf() const; + FX_DWORD getLength() const { return m_dwLength; } + const uint8_t* getPointer() const; void offset(FX_DWORD dwOffset); - - FX_DWORD getByteLeft(); + FX_DWORD getByteLeft() const; private: - const uint8_t* m_pBuf; + void AdvanceBit(); + bool IsInBound() const; + FX_DWORD LengthInBits() const; + const uint8_t* m_pBuf; FX_DWORD m_dwLength; - FX_DWORD m_dwByteIdx; - FX_DWORD m_dwBitIdx; -}; -inline CJBig2_BitStream::CJBig2_BitStream(const uint8_t* pBuffer, - FX_DWORD dwLength) { - m_pBuf = pBuffer; - m_dwLength = dwLength; - m_dwByteIdx = 0; - m_dwBitIdx = 0; - if (m_dwLength > 256 * 1024 * 1024) { - m_dwLength = 0; - m_pBuf = NULL; - } -} -inline CJBig2_BitStream::CJBig2_BitStream(CJBig2_BitStream& bs) { - m_pBuf = bs.m_pBuf; - m_dwLength = bs.m_dwLength; - m_dwByteIdx = bs.m_dwByteIdx; - m_dwBitIdx = bs.m_dwBitIdx; -} -inline CJBig2_BitStream::~CJBig2_BitStream() {} -inline int32_t CJBig2_BitStream::readNBits(FX_DWORD dwBits, - FX_DWORD* dwResult) { - FX_DWORD dwTemp = (m_dwByteIdx << 3) + m_dwBitIdx; - if (dwTemp <= (m_dwLength << 3)) { - *dwResult = 0; - if (dwTemp + dwBits <= (m_dwLength << 3)) { - dwTemp = dwBits; - } else { - dwTemp = (m_dwLength << 3) - dwTemp; - } - while (dwTemp > 0) { - *dwResult = - (*dwResult << 1) | ((m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01); - if (m_dwBitIdx == 7) { - m_dwByteIdx++; - m_dwBitIdx = 0; - } else { - m_dwBitIdx++; - } - dwTemp--; - } - return 0; - } else { - return -1; - } -} -inline int32_t CJBig2_BitStream::readNBits(FX_DWORD dwBits, int32_t* nResult) { - FX_DWORD dwTemp = (m_dwByteIdx << 3) + m_dwBitIdx; - if (dwTemp <= (m_dwLength << 3)) { - *nResult = 0; - if (dwTemp + dwBits <= (m_dwLength << 3)) { - dwTemp = dwBits; - } else { - dwTemp = (m_dwLength << 3) - dwTemp; - } - while (dwTemp > 0) { - *nResult = - (*nResult << 1) | ((m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01); - if (m_dwBitIdx == 7) { - m_dwByteIdx++; - m_dwBitIdx = 0; - } else { - m_dwBitIdx++; - } - dwTemp--; - } - return 0; - } else { - return -1; - } -} - -inline int32_t CJBig2_BitStream::read1Bit(FX_DWORD* dwResult) { - if (m_dwByteIdx < m_dwLength) { - *dwResult = (m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01; - if (m_dwBitIdx == 7) { - m_dwByteIdx++; - m_dwBitIdx = 0; - } else { - m_dwBitIdx++; - } - return 0; - } else { - return -1; - } -} -inline int32_t CJBig2_BitStream::read1Bit(FX_BOOL* bResult) { - if (m_dwByteIdx < m_dwLength) { - *bResult = (m_pBuf[m_dwByteIdx] >> (7 - m_dwBitIdx)) & 0x01; - if (m_dwBitIdx == 7) { - m_dwByteIdx++; - m_dwBitIdx = 0; - } else { - m_dwBitIdx++; - } - return 0; - } else { - return -1; - } -} -inline int32_t CJBig2_BitStream::read1Byte(uint8_t* cResult) { - if (m_dwByteIdx < m_dwLength) { - *cResult = m_pBuf[m_dwByteIdx]; - m_dwByteIdx++; - return 0; - } else { - return -1; - } -} - -inline int32_t CJBig2_BitStream::readInteger(FX_DWORD* dwResult) { - if (m_dwByteIdx + 3 < m_dwLength) { - *dwResult = (m_pBuf[m_dwByteIdx] << 24) | (m_pBuf[m_dwByteIdx + 1] << 16) | - (m_pBuf[m_dwByteIdx + 2] << 8) | m_pBuf[m_dwByteIdx + 3]; - m_dwByteIdx += 4; - return 0; - } else { - return -1; - } -} + CJBig2_BitStream(const CJBig2_BitStream&) = delete; + void operator=(const CJBig2_BitStream&) = delete; +}; -inline int32_t CJBig2_BitStream::readShortInteger(FX_WORD* dwResult) { - if (m_dwByteIdx + 1 < m_dwLength) { - *dwResult = (m_pBuf[m_dwByteIdx] << 8) | m_pBuf[m_dwByteIdx + 1]; - m_dwByteIdx += 2; - return 0; - } else { - return -1; - } -} -inline void CJBig2_BitStream::alignByte() { - if (m_dwBitIdx != 0) { - m_dwByteIdx++; - m_dwBitIdx = 0; - } -} -inline void CJBig2_BitStream::align4Byte() { - if (m_dwBitIdx != 0) { - m_dwByteIdx++; - m_dwBitIdx = 0; - } - m_dwByteIdx = (m_dwByteIdx + 3) & -4; -} -inline uint8_t CJBig2_BitStream::getAt(FX_DWORD dwOffset) { - if (dwOffset < m_dwLength) { - return m_pBuf[dwOffset]; - } else { - return 0; - } -} -inline uint8_t CJBig2_BitStream::getCurByte() { - if (m_dwByteIdx < m_dwLength) { - return m_pBuf[m_dwByteIdx]; - } else { - return 0; - } -} -inline uint8_t CJBig2_BitStream::getNextByte() { - if (m_dwByteIdx + 1 < m_dwLength) { - return m_pBuf[m_dwByteIdx + 1]; - } else { - return 0; - } -} -inline int32_t CJBig2_BitStream::incByteIdx() { - if (m_dwByteIdx < m_dwLength) { - m_dwByteIdx++; - return 0; - } else { - return -1; - } -} -inline uint8_t CJBig2_BitStream::getCurByte_arith() { - if (m_dwByteIdx < m_dwLength) { - return m_pBuf[m_dwByteIdx]; - } else { - return 0xff; - } -} -inline uint8_t CJBig2_BitStream::getNextByte_arith() { - if (m_dwByteIdx + 1 < m_dwLength) { - return m_pBuf[m_dwByteIdx + 1]; - } else { - return 0xff; - } -} -inline FX_DWORD CJBig2_BitStream::getOffset() { - return m_dwByteIdx; -} -inline void CJBig2_BitStream::setOffset(FX_DWORD dwOffset) { - if (dwOffset > m_dwLength) { - dwOffset = m_dwLength; - } - m_dwByteIdx = dwOffset; -} -inline FX_DWORD CJBig2_BitStream::getBitPos() { - return (m_dwByteIdx << 3) + m_dwBitIdx; -} -inline void CJBig2_BitStream::setBitPos(FX_DWORD dwBitPos) { - m_dwByteIdx = dwBitPos >> 3; - m_dwBitIdx = dwBitPos & 7; -} -inline const uint8_t* CJBig2_BitStream::getBuf() { - return m_pBuf; -} -inline const uint8_t* CJBig2_BitStream::getPointer() { - return m_pBuf + m_dwByteIdx; -} -inline void CJBig2_BitStream::offset(FX_DWORD dwOffset) { - m_dwByteIdx += dwOffset; -} -inline FX_DWORD CJBig2_BitStream::getByteLeft() { - return m_dwLength - m_dwByteIdx; -} -#endif +#endif // CORE_SRC_FXCODEC_JBIG2_JBIG2_BITSTREAM_H_ diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp index d5acc362fd..61a45bebae 100644 --- a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp +++ b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp @@ -5,6 +5,9 @@ // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "JBig2_HuffmanDecoder.h" + +#include "JBig2_Define.h" + CJBig2_HuffmanDecoder::CJBig2_HuffmanDecoder(CJBig2_BitStream* pStream) { m_pStream = pStream; } diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp index 60b5f3ca37..a09d152052 100644 --- a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp +++ b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp @@ -12,6 +12,7 @@ #include "../../../include/fxcrt/fx_memory.h" #include "JBig2_BitStream.h" +#include "JBig2_Define.h" CJBig2_HuffmanTable::CJBig2_HuffmanTable(const JBig2TableLine* pTable, int nLines, |