bitstrm.hpp
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上传日期:2007-02-02
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文件大小:7k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*************************************************************************
- This software module was originally developed by
- Ming-Chieh Lee (mingcl@microsoft.com), Microsoft Corporation
- Wei-ge Chen (wchen@microsoft.com), Microsoft Corporation
- Bruce Lin (blin@microsoft.com), Microsoft Corporation
- Chuang Gu (chuanggu@microsoft.com), Microsoft Corporation
- (date: March, 1996)
- and also edited by
- Yoshihiro Kikuchi (TOSHIBA CORPORATION)
- Takeshi Nagai (TOSHIBA CORPORATION)
- Toshiaki Watanabe (TOSHIBA CORPORATION)
- Noboru Yamaguchi (TOSHIBA CORPORATION)
- in the course of development of the MPEG-4 Video (ISO/IEC 14496-2).
- This software module is an implementation of a part of one or more MPEG-4 Video tools
- as specified by the MPEG-4 Video.
- ISO/IEC gives users of the MPEG-4 Video free license to this software module or modifications
- thereof for use in hardware or software products claiming conformance to the MPEG-4 Video.
- Those intending to use this software module in hardware or software products are advised that its use may infringe existing patents.
- The original developer of this software module and his/her company,
- the subsequent editors and their companies,
- and ISO/IEC have no liability for use of this software module or modifications thereof in an implementation.
- Copyright is not released for non MPEG-4 Video conforming products.
- Microsoft retains full right to use the code for his/her own purpose,
- assign or donate the code to a third party and to inhibit third parties from using the code for non <MPEG standard> conforming products.
- This copyright notice must be included in all copies or derivative works.
- Copyright (c) 1996, 1997.
- Module Name:
- bitstrm.hpp
- Abstract:
- Classes for bitstream I/O.
- Revision History:
- *************************************************************************/
- #ifndef _BITSTREAM_HPP_
- #define _BITSTREAM_HPP_
- #include "inbits.h"
- class istream;
- class ostream;
- Class CIOBitStream
- {
- public:
- // Operations
- Int getPosition () {return m_iBitPosition;}//get current bit position within current byte
- Int getCounter () {return m_lCounter;}//get counter of processed bits
- Void getCounter (Int lCounter) {m_lCounter = lCounter;}//set counter of processed bits
- protected:
- Int m_lCounter;
- Int m_iBitPosition;
- UInt m_iBuffer;
- CIOBitStream () {m_iBitPosition=0; m_iBuffer=0; m_lCounter=0;}
- };
- #if 0
- Class CInBitStream : public CIOBitStream
- {
- public:
- // Constructors
- CInBitStream () {m_bBookmarkOn = FALSE; m_chDecBuffer = 0; m_uNumOfBitsInBuffer = 0;}//create unattached bitstream
- CInBitStream (CInByteStreamBase *inStream, Int iBitPosition = 0)//create bitstream and attach to inStream
- {m_bBookmarkOn = FALSE; attach (inStream, iBitPosition); m_chDecBuffer = 0; m_uNumOfBitsInBuffer = 0;}
- // Attributes
- Int eof () const;//is EOF
- // Operations
- UInt getBits (UInt numBits);//return bits from the stream
- Int peekBits (const UInt numBits); //peek bits from the stream
- Int peekOneBit(const UInt numBits) const; //peek one bit as far ahead as needed
- Int peekBitsTillByteAlign (Int& nBitsToPeek); //peek 1-8 bits until the next byte alignment
- // Modified for Error Resilient Mode By Toshiba(1997-11-14)
- Int peekBitsFromByteAlign (Int numBits) const; //peek from the stream at byte boundary
- //Int peekBitsFromByteAlign (UInt numBits) const; //peek from the stream at byte boundary
- // End Toshiba(1997-11-14)
- Void getBits (Char *pBits, Int lNOfBits);//get bits and write to the buffer
- Void attach (CInByteStreamBase *inStream, Int iBitPosition = 0);//attach to the inStream
- Void flush (Int nExtraBits = 0);
- Void setBookmark ();
- Void gotoBookmark ();
- Void bookmark (Bool bSet);
- protected:
- CInByteStreamBase *m_pInStream;
- Char getBitsC (Int iNOfBits);
- UInt m_uNumOfBitsInBuffer;
- Char m_chDecBuffer;
- Bool m_bBookmarkOn;
- UInt m_uNumOfBitsInBuffer_bookmark;
- Char m_chDecBuffer_bookmark;
- Int m_lCounter_bookmark;
- Int m_iBitPosition_bookmark;
- UInt m_iBuffer_bookmark;
- Int m_bookmark_eofstate;
- };
- #endif
- Class COutBitStream : public CIOBitStream
- {
- public:
- // Constructors
- COutBitStream (){m_chEncBuffer = 0; m_uEncNumEmptyBits = 8;}//create unattached bitstream
- COutBitStream (Char* pchBuffer, Int iBitPosition = 0, ostream * pstrmTrace = NULL); //create bitstream and attach to outStream
- // attributes
- Char* str () const {return m_pchBuffer;}
- UInt pcount () const {return m_iBuffer;}
- // Operations
- Void putBits (Int data, UInt numBits, const Char* rgchSymbolName = NULL);//put bits into the stream
- Void putBits (Char *pBits, Int lNOfBits);//but bits from the array into the stream
- Void putBitStream(COutBitStream &cStrm); //put another bitstream into this one
- Void reset ();
- Void resetAll ();
- Void setBookmark ();
- Void gotoBookmark ();
- Int flush ();//flush remaing bits in the COutBitStream into the attached ostream
- Void trace (const Char* rgchSymbolName);//dump a string into the trace stream
- Void trace (Int iValue, const Char* rgchSymbolName);//dump a variable into the trace stream
- Void trace (UInt iValue, const Char* rgchSymbolName);//dump a variable into the trace stream
- Void trace (Float fltValue, const Char* rgchSymbolName);
- #ifndef __DOUBLE_PRECISION_
- Void trace (Double dblValue, const Char* rgchSymbolName);
- #endif // __DOUBLE_PRECISION_
- Void trace (const CMotionVector& mvValue, const Char* rgchSymbolName);
- Void trace (const CVector2D& vctValue, const Char* rgchSymbolName);
- Void trace (const CSite& stValue, const Char* rgchSymbolName);
- Void trace (const CFloatImage* pfi, const Char* rgchSymbolName, CRct rct = CRct ());//dump a variable into the trace stream
- Void trace (const Float* rgflt, UInt cElem, const Char* rgchSymbolName);//dump a variable into the trace stream
- Void trace (const Int* rgi, UInt cElem, const Char* rgchSymbolName);//dump a variable into the trace stream
- Void trace (const PixelC* rgpxlc, Int cCol, Int cRow, const Char* rgchSymbolName); //this is for tracing shape buffers
- // Added for Data Partitioning mode by Toshiba(1998-1-16)
- Void SetDontSendBits(const Bool bDontSendBits) {m_bDontSendBits = bDontSendBits;}
- Bool GetDontSendBits() {return m_bDontSendBits;}
- // End Toshiba(1998-1-16)
- protected:
- Char* m_pchBuffer;
- Char* m_pchBufferRun;
- ostream* m_pstrmTrace; //stream for trace file
- Void putBitsC (Char cBits, Int iNOfBits);
- Char m_chEncBuffer;
- UInt m_uEncNumEmptyBits;
- Void bookmark (Bool bSet);
- // Added for Data Partitioning mode by Toshiba(1998-1-16)
- Bool m_bDontSendBits;
- // End Toshiba(1998-1-16)
- };
- #endif