Line data    Source code

       1             : ////////////////////////////////////////////////////////////////////////////////
       2             : /// 
       3             : /// Sample interpolation routine using 8-tap band-limited Shannon interpolation 
       4             : /// with kaiser window.
       5             : ///
       6             : /// Notice. This algorithm is remarkably much heavier than linear or cubic
       7             : /// interpolation, and not remarkably better than cubic algorithm. Thus mostly
       8             : /// for experimental purposes
       9             : ///
      10             : /// Author        : Copyright (c) Olli Parviainen
      11             : /// Author e-mail : oparviai 'at' iki.fi
      12             : /// SoundTouch WWW: http://www.surina.net/soundtouch
      13             : ///
      14             : ////////////////////////////////////////////////////////////////////////////////
      15             : //
      16             : // $Id: InterpolateShannon.h 179 2014-01-06 18:41:42Z oparviai $
      17             : //
      18             : ////////////////////////////////////////////////////////////////////////////////
      19             : //
      20             : // License :
      21             : //
      22             : //  SoundTouch audio processing library
      23             : //  Copyright (c) Olli Parviainen
      24             : //
      25             : //  This library is free software; you can redistribute it and/or
      26             : //  modify it under the terms of the GNU Lesser General Public
      27             : //  License as published by the Free Software Foundation; either
      28             : //  version 2.1 of the License, or (at your option) any later version.
      29             : //
      30             : //  This library is distributed in the hope that it will be useful,
      31             : //  but WITHOUT ANY WARRANTY; without even the implied warranty of
      32             : //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      33             : //  Lesser General Public License for more details.
      34             : //
      35             : //  You should have received a copy of the GNU Lesser General Public
      36             : //  License along with this library; if not, write to the Free Software
      37             : //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      38             : //
      39             : ////////////////////////////////////////////////////////////////////////////////
      40             : 
      41             : #ifndef _InterpolateShannon_H_
      42             : #define _InterpolateShannon_H_
      43             : 
      44             : #include "RateTransposer.h"
      45             : #include "STTypes.h"
      46             : 
      47             : namespace soundtouch
      48             : {
      49             : 
      50           0 : class InterpolateShannon : public TransposerBase
      51             : {
      52             : protected:
      53             :     void resetRegisters();
      54             :     int transposeMono(SAMPLETYPE *dest, 
      55             :                         const SAMPLETYPE *src, 
      56             :                         int &srcSamples);
      57             :     int transposeStereo(SAMPLETYPE *dest, 
      58             :                         const SAMPLETYPE *src, 
      59             :                         int &srcSamples);
      60             :     int transposeMulti(SAMPLETYPE *dest, 
      61             :                         const SAMPLETYPE *src, 
      62             :                         int &srcSamples);
      63             : 
      64             :     float fract;
      65             : 
      66             : public:
      67             :     InterpolateShannon();
      68             : };
      69             : 
      70             : }
      71             : 
      72             : #endif