mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-12 23:01:01 -05:00
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
|
/***************************************************************************\
|
|||
|
|
*
|
|||
|
|
* MPEG Layer3-Audio Decoder
|
|||
|
|
* <EFBFBD> 1997-2006 by Fraunhofer IIS
|
|||
|
|
* All Rights Reserved
|
|||
|
|
*
|
|||
|
|
* filename: bitsequence.h
|
|||
|
|
* project : MPEG Decoder
|
|||
|
|
* author : Martin Sieler
|
|||
|
|
* date : 1997-12-23
|
|||
|
|
* contents/description: HEADER - bitsequence object
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
\***************************************************************************/
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* $Date: 2010/11/17 20:46:01 $
|
|||
|
|
* $Id: bitsequence.h,v 1.1 2010/11/17 20:46:01 audiodsp Exp $
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#ifndef __BITSEQUENCE_H__
|
|||
|
|
#define __BITSEQUENCE_H__
|
|||
|
|
|
|||
|
|
/* ------------------------ includes --------------------------------------*/
|
|||
|
|
|
|||
|
|
#include "bitstream.h"
|
|||
|
|
|
|||
|
|
/*-------------------------- defines --------------------------------------*/
|
|||
|
|
|
|||
|
|
/*-------------------------------------------------------------------------*/
|
|||
|
|
|
|||
|
|
//
|
|||
|
|
// Bitstream parser class.
|
|||
|
|
//
|
|||
|
|
// This helper class is basically a numerical value that can read itself from
|
|||
|
|
// a CBitStream interface for convenience. The decoder almost completely
|
|||
|
|
// does the bitstream parsing through CBitSequence rather than CBitStream
|
|||
|
|
// directly.
|
|||
|
|
//
|
|||
|
|
|
|||
|
|
class CBitSequence
|
|||
|
|
{
|
|||
|
|
public:
|
|||
|
|
|
|||
|
|
CBitSequence(int nBits = 0) { m_nBits = nBits; m_nValue = 0; }
|
|||
|
|
virtual ~CBitSequence() {}
|
|||
|
|
|
|||
|
|
void SetNumberOfBits(int nBits) { m_nBits = nBits; }
|
|||
|
|
int GetNumberOfBits() const { return m_nBits; }
|
|||
|
|
|
|||
|
|
bool ReadFrom(CBitStream &Bs) { m_nValue = Bs.GetBits(m_nBits); return true; }
|
|||
|
|
bool ReadFrom_Bit(CBitStream &Bs) { m_nValue = Bs.Get1Bit(); return true; }
|
|||
|
|
bool ReadFrom(CBitStream &Bs, int nBits) { SetNumberOfBits(nBits); return ReadFrom(Bs); }
|
|||
|
|
|
|||
|
|
bool Equals(int nValue) const { return (m_nValue == nValue); }
|
|||
|
|
|
|||
|
|
int ToInt() const { return m_nValue; }
|
|||
|
|
void FromInt(int nValue) { m_nValue = nValue; }
|
|||
|
|
|
|||
|
|
protected:
|
|||
|
|
|
|||
|
|
private:
|
|||
|
|
|
|||
|
|
int m_nBits;
|
|||
|
|
int m_nValue;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
/*-------------------------------------------------------------------------*/
|
|||
|
|
#endif
|