jamulus/src/buffer.h

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2006-01-28 12:29:22 +01:00
/******************************************************************************\
* Copyright (c) 2004-2006
*
* Author(s):
* Volker Fischer
*
******************************************************************************
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This program 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
\******************************************************************************/
#if !defined(BUFFER_H__3B123453_4344_BB23945IUHF1912__INCLUDED_)
#define BUFFER_H__3B123453_4344_BB23945IUHF1912__INCLUDED_
#include "util.h"
#include "global.h"
/* Definitions ****************************************************************/
/* time for fading effect for masking drop outs */
#define FADE_IN_OUT_TIME ((double) 0.3) /* ms */
#define FADE_IN_OUT_NUM_SAM ((int) (SAMPLE_RATE * FADE_IN_OUT_TIME) / 1000)
/* for extrapolation a shorter time for fading */
#define FADE_IN_OUT_NUM_SAM_EXTRA 5 /* samples */
/* Classes ********************************************************************/
class CNetBuf
{
public:
CNetBuf() {}
virtual ~CNetBuf() {}
void Init(const int iNewBlockSize, const int iNewNumBlocks);
int GetSize() {return iMemSize / iBlockSize;}
bool Put(CVector<double>& vecdData);
bool Get(CVector<double>& vecdData);
protected:
enum EBufState {BS_OK, BS_FULL, BS_EMPTY};
enum EClearType {CT_PUT, CT_GET};
void Clear(const EClearType eClearType);
int GetAvailSpace() const;
int GetAvailData() const;
void FadeInAudioDataBlock(CVector<double>& vecdData);
void FadeOutExtrapolateAudioDataBlock(CVector<double>& vecdData,
const double dExPDiff, const double dExPLastV);
CVector<double> vecdMemory;
int iMemSize;
int iBlockSize;
int iGetPos, iPutPos;
EBufState eBufState;
bool bFadeInNewPutData;
int iNumSamFading;
int iNumSamFadingExtra;
/* extrapolation parameters */
double dExPDiff;
double dExPLastV;
};
/* conversion buffer (very simple buffer) */
class CConvBuf
{
public:
CConvBuf () {}
virtual ~CConvBuf () {}
void Init ( const int iNewMemSize );
int GetSize() { return iMemSize; }
bool Put ( const CVector<short>& vecsData );
CVector<short> Get ();
protected:
CVector<short> vecsMemory;
int iMemSize;
int iBlockSize;
int iPutPos;
};
#endif /* !defined(BUFFER_H__3B123453_4344_BB23945IUHF1912__INCLUDED_) */