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comparison: media/libsoundtouch/src/InterpolateLinear.h
media/libsoundtouch/src/InterpolateLinear.h
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| 1 //////////////////////////////////////////////////////////////////////////////// | |
| 2 /// | |
| 3 /// Linear interpolation routine. | |
| 4 /// | |
| 5 /// Author : Copyright (c) Olli Parviainen | |
| 6 /// Author e-mail : oparviai 'at' iki.fi | |
| 7 /// SoundTouch WWW: http://www.surina.net/soundtouch | |
| 8 /// | |
| 9 //////////////////////////////////////////////////////////////////////////////// | |
| 10 // | |
| 11 // $Id: InterpolateLinear.h 179 2014-01-06 18:41:42Z oparviai $ | |
| 12 // | |
| 13 //////////////////////////////////////////////////////////////////////////////// | |
| 14 // | |
| 15 // License : | |
| 16 // | |
| 17 // SoundTouch audio processing library | |
| 18 // Copyright (c) Olli Parviainen | |
| 19 // | |
| 20 // This library is free software; you can redistribute it and/or | |
| 21 // modify it under the terms of the GNU Lesser General Public | |
| 22 // License as published by the Free Software Foundation; either | |
| 23 // version 2.1 of the License, or (at your option) any later version. | |
| 24 // | |
| 25 // This library is distributed in the hope that it will be useful, | |
| 26 // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 27 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 28 // Lesser General Public License for more details. | |
| 29 // | |
| 30 // You should have received a copy of the GNU Lesser General Public | |
| 31 // License along with this library; if not, write to the Free Software | |
| 32 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 33 // | |
| 34 //////////////////////////////////////////////////////////////////////////////// | |
| 35 | |
| 36 #ifndef _InterpolateLinear_H_ | |
| 37 #define _InterpolateLinear_H_ | |
| 38 | |
| 39 #include "RateTransposer.h" | |
| 40 #include "STTypes.h" | |
| 41 | |
| 42 namespace soundtouch | |
| 43 { | |
| 44 | |
| 45 /// Linear transposer class that uses integer arithmetics | |
| 46 class InterpolateLinearInteger : public TransposerBase | |
| 47 { | |
| 48 protected: | |
| 49 int iFract; | |
| 50 int iRate; | |
| 51 | |
| 52 virtual void resetRegisters(); | |
| 53 | |
| 54 virtual int transposeMono(SAMPLETYPE *dest, | |
| 55 const SAMPLETYPE *src, | |
| 56 int &srcSamples); | |
| 57 virtual int transposeStereo(SAMPLETYPE *dest, | |
| 58 const SAMPLETYPE *src, | |
| 59 int &srcSamples); | |
| 60 virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples); | |
| 61 public: | |
| 62 InterpolateLinearInteger(); | |
| 63 | |
| 64 /// Sets new target rate. Normal rate = 1.0, smaller values represent slower | |
| 65 /// rate, larger faster rates. | |
| 66 virtual void setRate(float newRate); | |
| 67 }; | |
| 68 | |
| 69 | |
| 70 /// Linear transposer class that uses floating point arithmetics | |
| 71 class InterpolateLinearFloat : public TransposerBase | |
| 72 { | |
| 73 protected: | |
| 74 float fract; | |
| 75 | |
| 76 virtual void resetRegisters(); | |
| 77 | |
| 78 virtual int transposeMono(SAMPLETYPE *dest, | |
| 79 const SAMPLETYPE *src, | |
| 80 int &srcSamples); | |
| 81 virtual int transposeStereo(SAMPLETYPE *dest, | |
| 82 const SAMPLETYPE *src, | |
| 83 int &srcSamples); | |
| 84 virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples); | |
| 85 | |
| 86 public: | |
| 87 InterpolateLinearFloat(); | |
| 88 }; | |
| 89 | |
| 90 } | |
| 91 | |
| 92 #endif |
