1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libsoundtouch/src/InterpolateLinear.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,92 @@
1.4 +////////////////////////////////////////////////////////////////////////////////
1.5 +///
1.6 +/// Linear interpolation routine.
1.7 +///
1.8 +/// Author : Copyright (c) Olli Parviainen
1.9 +/// Author e-mail : oparviai 'at' iki.fi
1.10 +/// SoundTouch WWW: http://www.surina.net/soundtouch
1.11 +///
1.12 +////////////////////////////////////////////////////////////////////////////////
1.13 +//
1.14 +// $Id: InterpolateLinear.h 179 2014-01-06 18:41:42Z oparviai $
1.15 +//
1.16 +////////////////////////////////////////////////////////////////////////////////
1.17 +//
1.18 +// License :
1.19 +//
1.20 +// SoundTouch audio processing library
1.21 +// Copyright (c) Olli Parviainen
1.22 +//
1.23 +// This library is free software; you can redistribute it and/or
1.24 +// modify it under the terms of the GNU Lesser General Public
1.25 +// License as published by the Free Software Foundation; either
1.26 +// version 2.1 of the License, or (at your option) any later version.
1.27 +//
1.28 +// This library is distributed in the hope that it will be useful,
1.29 +// but WITHOUT ANY WARRANTY; without even the implied warranty of
1.30 +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1.31 +// Lesser General Public License for more details.
1.32 +//
1.33 +// You should have received a copy of the GNU Lesser General Public
1.34 +// License along with this library; if not, write to the Free Software
1.35 +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.36 +//
1.37 +////////////////////////////////////////////////////////////////////////////////
1.38 +
1.39 +#ifndef _InterpolateLinear_H_
1.40 +#define _InterpolateLinear_H_
1.41 +
1.42 +#include "RateTransposer.h"
1.43 +#include "STTypes.h"
1.44 +
1.45 +namespace soundtouch
1.46 +{
1.47 +
1.48 +/// Linear transposer class that uses integer arithmetics
1.49 +class InterpolateLinearInteger : public TransposerBase
1.50 +{
1.51 +protected:
1.52 + int iFract;
1.53 + int iRate;
1.54 +
1.55 + virtual void resetRegisters();
1.56 +
1.57 + virtual int transposeMono(SAMPLETYPE *dest,
1.58 + const SAMPLETYPE *src,
1.59 + int &srcSamples);
1.60 + virtual int transposeStereo(SAMPLETYPE *dest,
1.61 + const SAMPLETYPE *src,
1.62 + int &srcSamples);
1.63 + virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);
1.64 +public:
1.65 + InterpolateLinearInteger();
1.66 +
1.67 + /// Sets new target rate. Normal rate = 1.0, smaller values represent slower
1.68 + /// rate, larger faster rates.
1.69 + virtual void setRate(float newRate);
1.70 +};
1.71 +
1.72 +
1.73 +/// Linear transposer class that uses floating point arithmetics
1.74 +class InterpolateLinearFloat : public TransposerBase
1.75 +{
1.76 +protected:
1.77 + float fract;
1.78 +
1.79 + virtual void resetRegisters();
1.80 +
1.81 + virtual int transposeMono(SAMPLETYPE *dest,
1.82 + const SAMPLETYPE *src,
1.83 + int &srcSamples);
1.84 + virtual int transposeStereo(SAMPLETYPE *dest,
1.85 + const SAMPLETYPE *src,
1.86 + int &srcSamples);
1.87 + virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);
1.88 +
1.89 +public:
1.90 + InterpolateLinearFloat();
1.91 +};
1.92 +
1.93 +}
1.94 +
1.95 +#endif
