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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 Chris Cannam and 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 READ_ONLY_WAVE_FILE_MODEL_H
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17 #define READ_ONLY_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 #include "base/Thread.h"
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22 #include <QMutex>
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23 #include <QTimer>
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24
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25 #include "data/fileio/FileSource.h"
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26
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27 #include "RangeSummarisableTimeValueModel.h"
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28 #include "PowerOfSqrtTwoZoomConstraint.h"
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29
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30 #include <stdlib.h>
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31
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32 class AudioFileReader;
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33
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34 class ReadOnlyWaveFileModel : public WaveFileModel
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35 {
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36 Q_OBJECT
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37
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38 public:
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39 /**
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40 * Construct a WaveFileModel from a source path and optional
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41 * resampling target rate
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42 */
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43 ReadOnlyWaveFileModel(FileSource source, sv_samplerate_t targetRate = 0);
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44
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45 /**
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46 * Construct a WaveFileModel from a source path using an existing
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47 * AudioFileReader. The model does not take ownership of the
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48 * AudioFileReader, which remains managed by the caller and must
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49 * outlive the model.
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50 */
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51 ReadOnlyWaveFileModel(FileSource source, AudioFileReader *reader);
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52
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53 ~ReadOnlyWaveFileModel();
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54
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55 bool isOK() const override;
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56 bool isReady(int *) const override;
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57 int getCompletion() const override {
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58 int c = 0;
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59 (void)isReady(&c);
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60 return c;
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61 }
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62
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63 const ZoomConstraint *getZoomConstraint() const override { return &m_zoomConstraint; }
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64
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65 sv_frame_t getFrameCount() const override;
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66 int getChannelCount() const override;
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67 sv_samplerate_t getSampleRate() const override;
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68 sv_samplerate_t getNativeRate() const override;
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69
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70 QString getTitle() const override;
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71 QString getMaker() const override;
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72 QString getLocation() const override;
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73
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74 QString getLocalFilename() const;
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75
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76 float getValueMinimum() const override { return -1.0f; }
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77 float getValueMaximum() const override { return 1.0f; }
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78
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79 sv_frame_t getStartFrame() const override { return m_startFrame; }
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80 sv_frame_t getTrueEndFrame() const override { return m_startFrame + getFrameCount(); }
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81
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82 void setStartFrame(sv_frame_t startFrame) override { m_startFrame = startFrame; }
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83
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84 floatvec_t getData(int channel, sv_frame_t start, sv_frame_t count) const override;
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85
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86 std::vector<floatvec_t> getMultiChannelData(int fromchannel, int tochannel, sv_frame_t start, sv_frame_t count) const override;
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87
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88 int getSummaryBlockSize(int desired) const override;
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89
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90 void getSummaries(int channel, sv_frame_t start, sv_frame_t count,
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91 RangeBlock &ranges,
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92 int &blockSize) const override;
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93
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94 Range getSummary(int channel, sv_frame_t start, sv_frame_t count) const override;
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95
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96 QString getTypeName() const override { return tr("Wave File"); }
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97
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98 void toXml(QTextStream &out,
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99 QString indent = "",
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100 QString extraAttributes = "") const override;
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101
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102 protected slots:
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103 void fillTimerTimedOut();
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104 void cacheFilled();
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105
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106 protected:
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107 void initialize();
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108
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109 class RangeCacheFillThread : public Thread
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110 {
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111 public:
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112 RangeCacheFillThread(ReadOnlyWaveFileModel &model) :
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113 m_model(model), m_fillExtent(0),
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114 m_frameCount(model.getFrameCount()) { }
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115
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116 sv_frame_t getFillExtent() const { return m_fillExtent; }
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117 void run() override;
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118
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119 protected:
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120 ReadOnlyWaveFileModel &m_model;
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121 sv_frame_t m_fillExtent;
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122 sv_frame_t m_frameCount;
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123 };
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124
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125 void fillCache();
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126
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127 FileSource m_source;
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128 QString m_path;
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129 AudioFileReader *m_reader;
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130 bool m_myReader;
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131
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132 sv_frame_t m_startFrame;
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133
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134 RangeBlock m_cache[2]; // interleaved at two base resolutions
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135 mutable QMutex m_mutex;
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136 RangeCacheFillThread *m_fillThread;
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137 QTimer *m_updateTimer;
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138 sv_frame_t m_lastFillExtent;
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139 mutable int m_prevCompletion;
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140 bool m_exiting;
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141 static PowerOfSqrtTwoZoomConstraint m_zoomConstraint;
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142
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143 mutable floatvec_t m_directRead;
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144 mutable sv_frame_t m_lastDirectReadStart;
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145 mutable sv_frame_t m_lastDirectReadCount;
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146 mutable QMutex m_directReadMutex;
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147 };
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148
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149 #endif
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