1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libsoundtouch/src/InterpolateShannon.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,72 @@
1.4 +////////////////////////////////////////////////////////////////////////////////
1.5 +///
1.6 +/// Sample interpolation routine using 8-tap band-limited Shannon interpolation
1.7 +/// with kaiser window.
1.8 +///
1.9 +/// Notice. This algorithm is remarkably much heavier than linear or cubic
1.10 +/// interpolation, and not remarkably better than cubic algorithm. Thus mostly
1.11 +/// for experimental purposes
1.12 +///
1.13 +/// Author : Copyright (c) Olli Parviainen
1.14 +/// Author e-mail : oparviai 'at' iki.fi
1.15 +/// SoundTouch WWW: http://www.surina.net/soundtouch
1.16 +///
1.17 +////////////////////////////////////////////////////////////////////////////////
1.18 +//
1.19 +// $Id: InterpolateShannon.h 179 2014-01-06 18:41:42Z oparviai $
1.20 +//
1.21 +////////////////////////////////////////////////////////////////////////////////
1.22 +//
1.23 +// License :
1.24 +//
1.25 +// SoundTouch audio processing library
1.26 +// Copyright (c) Olli Parviainen
1.27 +//
1.28 +// This library is free software; you can redistribute it and/or
1.29 +// modify it under the terms of the GNU Lesser General Public
1.30 +// License as published by the Free Software Foundation; either
1.31 +// version 2.1 of the License, or (at your option) any later version.
1.32 +//
1.33 +// This library is distributed in the hope that it will be useful,
1.34 +// but WITHOUT ANY WARRANTY; without even the implied warranty of
1.35 +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1.36 +// Lesser General Public License for more details.
1.37 +//
1.38 +// You should have received a copy of the GNU Lesser General Public
1.39 +// License along with this library; if not, write to the Free Software
1.40 +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.41 +//
1.42 +////////////////////////////////////////////////////////////////////////////////
1.43 +
1.44 +#ifndef _InterpolateShannon_H_
1.45 +#define _InterpolateShannon_H_
1.46 +
1.47 +#include "RateTransposer.h"
1.48 +#include "STTypes.h"
1.49 +
1.50 +namespace soundtouch
1.51 +{
1.52 +
1.53 +class InterpolateShannon : public TransposerBase
1.54 +{
1.55 +protected:
1.56 + void resetRegisters();
1.57 + int transposeMono(SAMPLETYPE *dest,
1.58 + const SAMPLETYPE *src,
1.59 + int &srcSamples);
1.60 + int transposeStereo(SAMPLETYPE *dest,
1.61 + const SAMPLETYPE *src,
1.62 + int &srcSamples);
1.63 + int transposeMulti(SAMPLETYPE *dest,
1.64 + const SAMPLETYPE *src,
1.65 + int &srcSamples);
1.66 +
1.67 + float fract;
1.68 +
1.69 +public:
1.70 + InterpolateShannon();
1.71 +};
1.72 +
1.73 +}
1.74 +
1.75 +#endif
