| 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4RTOutBitStream.hh,v 1.7 2006/06/29 21:23:23 gunter Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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| 29 | // |
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| 30 | // |
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| 31 | |
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| 32 | // class description: |
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| 33 | // |
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| 34 | // This class represents a line of JPEG code. This class must be used exclusively |
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| 35 | // by G4RTJpegCoder. |
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| 36 | // |
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| 37 | |
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| 38 | #ifndef G4RTOutBitStream_H |
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| 39 | #define G4RTOutBitStream_H 1 |
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| 40 | #include "G4RTJpeg.hh" |
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| 41 | |
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| 42 | static const u_char BitFullMaskT[8] = {0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f |
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| 43 | , 0xff}; |
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| 44 | |
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| 45 | class G4OutBitStream |
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| 46 | { |
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| 47 | public: |
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| 48 | G4OutBitStream(int size); |
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| 49 | void SetBits(int v, int numBits); |
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| 50 | void SetByte(u_char dat); |
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| 51 | void SetWord(u_int dat); |
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| 52 | void CopyByte(const char* src, int n); |
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| 53 | |
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| 54 | u_char* GetStreamAddress(void){return mHeadOfBuf;}; |
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| 55 | int GetStreamSize(void){return mBuf - mHeadOfBuf;}; |
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| 56 | |
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| 57 | |
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| 58 | protected: |
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| 59 | u_char* mHeadOfBuf; |
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| 60 | u_char* mBuf; |
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| 61 | u_char* mEndOfBuf; |
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| 62 | int mBitPos; |
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| 63 | int mWriteFlag; |
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| 64 | |
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| 65 | void IncBuf(void); |
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| 66 | void FullBit(void); |
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| 67 | void Set8Bits(u_char v, int numBits); |
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| 68 | void SetFewBits(u_char v, int numBits); |
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| 69 | void SetBits2Byte(u_char v, int numBits); |
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| 70 | }; |
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| 71 | |
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| 72 | #endif |
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