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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 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2006 QMUL.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #ifndef _WRITABLE_WAVE_FILE_MODEL_H_
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17 #define _WRITABLE_WAVE_FILE_MODEL_H_
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18
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19 #include "WaveFileModel.h"
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20
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21 class WavFileWriter;
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22 class WavFileReader;
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23
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24 class WritableWaveFileModel : public RangeSummarisableTimeValueModel
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25 {
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26 Q_OBJECT
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27
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28 public:
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29 WritableWaveFileModel(sv_samplerate_t sampleRate, int channels, QString path = "");
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30 ~WritableWaveFileModel();
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31
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32 /**
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33 * Call addSamples to append a block of samples to the end of the
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34 * file. Caller should also call setCompletion to update the
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35 * progress of this file, if it has a known end point, and should
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36 * call setCompletion(100) when the file has been written.
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37 */
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38 virtual bool addSamples(float **samples, sv_frame_t count);
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39
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40 bool isOK() const;
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41 bool isReady(int *) const;
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42
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43 virtual void setCompletion(int completion); // percentage
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44 virtual int getCompletion() const { return m_completion; }
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45
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46 const ZoomConstraint *getZoomConstraint() const {
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47 static PowerOfSqrtTwoZoomConstraint zc;
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48 return &zc;
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49 }
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50
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51 sv_frame_t getFrameCount() const;
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52 int getChannelCount() const { return m_channels; }
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53 sv_samplerate_t getSampleRate() const { return m_sampleRate; }
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54
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55 float getValueMinimum() const { return -1.0f; }
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56 float getValueMaximum() const { return 1.0f; }
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57
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58 virtual sv_frame_t getStartFrame() const { return m_startFrame; }
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59 virtual sv_frame_t getEndFrame() const { return m_startFrame + getFrameCount(); }
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60
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61 void setStartFrame(sv_frame_t startFrame);
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62
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63 virtual sv_frame_t getData(int channel, sv_frame_t start, sv_frame_t count,
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64 float *buffer) const;
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65
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66 virtual sv_frame_t getData(int channel, sv_frame_t start, sv_frame_t count,
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67 double *buffer) const;
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68
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69 virtual sv_frame_t getData(int fromchannel, int tochannel,
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70 sv_frame_t start, sv_frame_t count,
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71 float **buffer) const;
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72
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73 virtual int getSummaryBlockSize(int desired) const;
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74
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75 virtual void getSummaries(int channel, sv_frame_t start, sv_frame_t count,
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76 RangeBlock &ranges, int &blockSize) const;
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77
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78 virtual Range getSummary(int channel, sv_frame_t start, sv_frame_t count) const;
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79
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80 QString getTypeName() const { return tr("Writable Wave File"); }
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81
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82 virtual void toXml(QTextStream &out,
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83 QString indent = "",
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84 QString extraAttributes = "") const;
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85
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86 protected:
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87 WaveFileModel *m_model;
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88 WavFileWriter *m_writer;
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89 WavFileReader *m_reader;
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90 sv_samplerate_t m_sampleRate;
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91 int m_channels;
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92 sv_frame_t m_frameCount;
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93 sv_frame_t m_startFrame;
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94 int m_completion;
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95 };
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96
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97 #endif
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98
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