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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 CQSPECTROGRAM_H
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33 #define CQSPECTROGRAM_H
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34
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35 #include "ConstantQ.h"
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36
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37 class CQSpectrogram : public CQBase
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38 {
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39 public:
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40 enum Interpolation {
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41 InterpolateZeros, // leave empty cells as zero
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42 InterpolateHold, // repeat prior cell
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43 InterpolateLinear, // linear interpolation between consecutive time cells
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44 };
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45
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46 CQSpectrogram(CQParameters params, Interpolation interpolation);
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47 virtual ~CQSpectrogram();
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48
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49 virtual double getSampleRate() const { return m_cq.getSampleRate(); }
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50 virtual int getBinsPerOctave() const { return m_cq.getBinsPerOctave(); }
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51 virtual int getOctaves() const { return m_cq.getOctaves(); }
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52 virtual int getTotalBins() const { return m_cq.getTotalBins(); }
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53 virtual int getColumnHop() const { return m_cq.getColumnHop(); }
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54 virtual int getLatency() const { return m_cq.getLatency(); }
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55 virtual double getMaxFrequency() const { return m_cq.getMaxFrequency(); }
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56 virtual double getMinFrequency() const { return m_cq.getMinFrequency(); }
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57 virtual double getBinFrequency(int bin) const { return m_cq.getBinFrequency(bin); }
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58
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59 RealBlock process(const RealSequence &);
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60 RealBlock getRemainingOutput();
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61
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62 private:
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63 ConstantQ m_cq;
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64 Interpolation m_interpolation;
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65
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66 RealBlock m_buffer;
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67 RealBlock postProcess(const ComplexBlock &, bool insist);
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68 RealBlock fetchHold(bool insist);
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69 RealBlock fetchLinear(bool insist);
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70 RealBlock linearInterpolated(const RealBlock &, int, int);
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71 RealColumn m_prevColumn;
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72 };
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73
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74 #endif
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