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comparison: media/libsoundtouch/src/InterpolateShannon.h
media/libsoundtouch/src/InterpolateShannon.h
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| 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 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 |
