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93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
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////////////////////////////////////////////////////////////////////////////////
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///
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/// Linear interpolation routine.
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///
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/// Author : Copyright (c) Olli Parviainen
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/// Author e-mail : oparviai 'at' iki.fi
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/// SoundTouch WWW: http://www.surina.net/soundtouch
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///
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////////////////////////////////////////////////////////////////////////////////
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//
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// $Id: InterpolateLinear.h 225 2015-07-26 14:45:48Z oparviai $
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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// License :
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//
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// SoundTouch audio processing library
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// Copyright (c) Olli Parviainen
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////
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#ifndef _InterpolateLinear_H_
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#define _InterpolateLinear_H_
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#include "RateTransposer.h"
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#include "STTypes.h"
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namespace soundtouch
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{
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/// Linear transposer class that uses integer arithmetics
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class InterpolateLinearInteger : public TransposerBase
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{
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protected:
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int iFract;
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int iRate;
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virtual void resetRegisters();
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virtual int transposeMono(SAMPLETYPE *dest,
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const SAMPLETYPE *src,
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int &srcSamples);
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virtual int transposeStereo(SAMPLETYPE *dest,
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const SAMPLETYPE *src,
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int &srcSamples);
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virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);
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public:
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InterpolateLinearInteger();
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/// Sets new target rate. Normal rate = 1.0, smaller values represent slower
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/// rate, larger faster rates.
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virtual void setRate(double newRate);
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};
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/// Linear transposer class that uses floating point arithmetics
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class InterpolateLinearFloat : public TransposerBase
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{
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protected:
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double fract;
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virtual void resetRegisters();
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virtual int transposeMono(SAMPLETYPE *dest,
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const SAMPLETYPE *src,
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int &srcSamples);
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virtual int transposeStereo(SAMPLETYPE *dest,
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const SAMPLETYPE *src,
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int &srcSamples);
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virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);
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public:
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InterpolateLinearFloat();
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};
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}
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#endif
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