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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2 /*
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3 Constant-Q library
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4 Copyright (c) 2013-2014 Queen Mary, University of London
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5
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6 Permission is hereby granted, free of charge, to any person
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7 obtaining a copy of this software and associated documentation
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8 files (the "Software"), to deal in the Software without
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9 restriction, including without limitation the rights to use, copy,
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10 modify, merge, publish, distribute, sublicense, and/or sell copies
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11 of the Software, and to permit persons to whom the Software is
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12 furnished to do so, subject to the following conditions:
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13
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14 The above copyright notice and this permission notice shall be
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15 included in all copies or substantial portions of the Software.
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16
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17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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18 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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20 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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21 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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22 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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24
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25 Except as contained in this notice, the names of the Centre for
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26 Digital Music; Queen Mary, University of London; and Chris Cannam
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27 shall not be used in advertising or otherwise to promote the sale,
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28 use or other dealings in this Software without prior written
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29 authorization.
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30 */
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31
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32 #ifndef CQ_KERNEL_H
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33 #define CQ_KERNEL_H
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34
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35 #include "CQParameters.h"
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36
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37 #include <vector>
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38 #include <complex>
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39
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40 class FFT;
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41
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42 class CQKernel
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43 {
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44 public:
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45 CQKernel(CQParameters params);
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46 ~CQKernel();
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47
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48 bool isValid() const { return m_valid; }
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49
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50 struct Properties {
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51 double sampleRate;
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52 double maxFrequency;
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53 double minFrequency;
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54 int binsPerOctave;
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55 int fftSize;
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56 int fftHop;
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57 int atomsPerFrame;
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58 int atomSpacing;
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59 int firstCentre;
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60 int lastCentre;
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61 double Q;
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62 };
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63
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64 Properties getProperties() const { return m_p; }
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65
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66 std::vector<std::complex<double> > processForward
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67 (const std::vector<std::complex<double> > &);
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68
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69 std::vector<std::complex<double> > processInverse
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70 (const std::vector<std::complex<double> > &);
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71
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72 private:
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73 const CQParameters m_inparams;
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74 Properties m_p;
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75 bool m_valid;
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76 FFT *m_fft;
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77
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78 struct KernelMatrix {
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79 std::vector<int> origin;
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80 std::vector<std::vector<std::complex<double> > > data;
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81 };
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82 KernelMatrix m_kernel;
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83
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84 std::vector<double> makeWindow(int len) const;
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85 bool generateKernel();
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86 void finaliseKernel();
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87 };
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88
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89 #endif
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