| // Copyright 2014 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 |
| |
| #ifndef CORE_FXCODEC_JBIG2_JBIG2_ARITHDECODER_H_ |
| #define CORE_FXCODEC_JBIG2_JBIG2_ARITHDECODER_H_ |
| |
| #include <stdint.h> |
| |
| #include "core/fxcrt/unowned_ptr.h" |
| |
| class CJBig2_BitStream; |
| |
| struct JBig2ArithCtx { |
| JBig2ArithCtx() : MPS(0), I(0) {} |
| |
| unsigned int MPS; |
| unsigned int I; |
| }; |
| |
| class CJBig2_ArithDecoder { |
| public: |
| explicit CJBig2_ArithDecoder(CJBig2_BitStream* pStream); |
| |
| ~CJBig2_ArithDecoder(); |
| |
| int DECODE(JBig2ArithCtx* pCX); |
| |
| bool IsComplete() const { return m_Complete; } |
| |
| private: |
| void BYTEIN(); |
| void ReadValueA(); |
| |
| bool m_Complete; |
| uint8_t m_B; |
| unsigned int m_C; |
| unsigned int m_A; |
| unsigned int m_CT; |
| UnownedPtr<CJBig2_BitStream> const m_pStream; |
| }; |
| |
| #endif // CORE_FXCODEC_JBIG2_JBIG2_ARITHDECODER_H_ |