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| 1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| 6 | 6 |
| 7 #include "core/fxcodec/jbig2/JBig2_ArithDecoder.h" | 7 #include "core/fxcodec/jbig2/JBig2_ArithDecoder.h" |
| 8 | 8 |
| 9 #include "core/fxcodec/jbig2/JBig2_BitStream.h" | 9 #include "core/fxcodec/jbig2/JBig2_BitStream.h" |
| 10 #include "core/fxcrt/include/fx_basic.h" | 10 #include "core/fxcrt/fx_basic.h" |
| 11 | 11 |
| 12 namespace { | 12 namespace { |
| 13 | 13 |
| 14 struct JBig2ArithQe { | 14 struct JBig2ArithQe { |
| 15 unsigned int Qe; | 15 unsigned int Qe; |
| 16 unsigned int NMPS; | 16 unsigned int NMPS; |
| 17 unsigned int NLPS; | 17 unsigned int NLPS; |
| 18 unsigned int nSwitch; | 18 unsigned int nSwitch; |
| 19 }; | 19 }; |
| 20 | 20 |
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| 111 | 111 |
| 112 void CJBig2_ArithDecoder::ReadValueA() { | 112 void CJBig2_ArithDecoder::ReadValueA() { |
| 113 do { | 113 do { |
| 114 if (m_CT == 0) | 114 if (m_CT == 0) |
| 115 BYTEIN(); | 115 BYTEIN(); |
| 116 m_A <<= 1; | 116 m_A <<= 1; |
| 117 m_C <<= 1; | 117 m_C <<= 1; |
| 118 --m_CT; | 118 --m_CT; |
| 119 } while ((m_A & kDefaultAValue) == 0); | 119 } while ((m_A & kDefaultAValue) == 0); |
| 120 } | 120 } |
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