BitVector.hh
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:2k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /**********
- This library is free software; you can redistribute it and/or modify it under
- the terms of the GNU Lesser General Public License as published by the
- Free Software Foundation; either version 2.1 of the License, or (at your
- option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
- This library is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
- more details.
- You should have received a copy of the GNU Lesser General Public License
- along with this library; if not, write to the Free Software Foundation, Inc.,
- 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- **********/
- // "liveMedia"
- // Copyright (c) 1996-2001 Live Networks, Inc. All rights reserved.
- // Bit Vector data structure
- // C++ header
- #ifndef _BIT_VECTOR_HH
- #define _BIT_VECTOR_HH
- class BitVector {
- public:
- BitVector(unsigned char* baseBytePtr,
- unsigned baseBitOffset,
- unsigned totNumBits);
- void setup(unsigned char* baseBytePtr,
- unsigned baseBitOffset,
- unsigned totNumBits);
- void putBits(unsigned from, unsigned numBits); // "numBits" <= 32
- void put1Bit(unsigned bit);
- unsigned getBits(unsigned numBits); // "numBits" <= 32
- unsigned get1Bit();
- void skipBits(unsigned numBits);
- unsigned curBitIndex() const { return fCurBitIndex; }
- unsigned totNumBits() const { return fTotNumBits; }
- private:
- unsigned char* fBaseBytePtr;
- unsigned fBaseBitOffset;
- unsigned fTotNumBits;
- unsigned fCurBitIndex;
- };
- // A general bit copy operation:
- void shiftBits(unsigned char* toBasePtr, unsigned toBitOffset,
- unsigned char const* fromBasePtr, unsigned fromBitOffset,
- unsigned numBits);
- #endif