99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
///
|
|
/// Linear interpolation routine.
|
|
///
|
|
/// Author : Copyright (c) Olli Parviainen
|
|
/// Author e-mail : oparviai 'at' iki.fi
|
|
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
|
///
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// License :
|
|
//
|
|
// SoundTouch audio processing library
|
|
// Copyright (c) Olli Parviainen
|
|
//
|
|
// 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.
|
|
//
|
|
// 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
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _InterpolateLinear_H_
|
|
#define _InterpolateLinear_H_
|
|
|
|
#include "RateTransposer.h"
|
|
#include "STTypes.h"
|
|
|
|
namespace soundtouch
|
|
{
|
|
|
|
/// Linear transposer class that uses integer arithmetic
|
|
class InterpolateLinearInteger : public TransposerBase
|
|
{
|
|
protected:
|
|
int iFract;
|
|
int iRate;
|
|
|
|
virtual int transposeMono(SAMPLETYPE *dest,
|
|
const SAMPLETYPE *src,
|
|
int &srcSamples) override;
|
|
virtual int transposeStereo(SAMPLETYPE *dest,
|
|
const SAMPLETYPE *src,
|
|
int &srcSamples) override;
|
|
virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples) override;
|
|
public:
|
|
InterpolateLinearInteger();
|
|
|
|
/// Sets new target rate. Normal rate = 1.0, smaller values represent slower
|
|
/// rate, larger faster rates.
|
|
virtual void setRate(double newRate) override;
|
|
|
|
virtual void resetRegisters() override;
|
|
|
|
int getLatency() const
|
|
{
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
|
|
/// Linear transposer class that uses floating point arithmetic
|
|
class InterpolateLinearFloat : public TransposerBase
|
|
{
|
|
protected:
|
|
double fract;
|
|
|
|
virtual int transposeMono(SAMPLETYPE *dest,
|
|
const SAMPLETYPE *src,
|
|
int &srcSamples);
|
|
virtual int transposeStereo(SAMPLETYPE *dest,
|
|
const SAMPLETYPE *src,
|
|
int &srcSamples);
|
|
virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);
|
|
|
|
public:
|
|
InterpolateLinearFloat();
|
|
|
|
virtual void resetRegisters();
|
|
|
|
int getLatency() const
|
|
{
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|