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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 #include <atomic>
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33
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34 class AudioFileReader;
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35
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36 class ReadOnlyWaveFileModel : public WaveFileModel
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37 {
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38 Q_OBJECT
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39
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40 public:
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41 /**
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42 * Construct a WaveFileModel from a source path and optional
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43 * resampling target rate
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44 */
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45 ReadOnlyWaveFileModel(FileSource source, sv_samplerate_t targetRate = 0);
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46
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47 /**
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48 * Construct a WaveFileModel from a source path using an existing
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49 * AudioFileReader. The model does not take ownership of the
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50 * AudioFileReader, which remains managed by the caller and must
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51 * outlive the model.
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52 */
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53 ReadOnlyWaveFileModel(FileSource source, AudioFileReader *reader);
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54
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55 ~ReadOnlyWaveFileModel();
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56
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57 bool isOK() const override;
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58 bool isReady(int *) const override;
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59 int getCompletion() const override {
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60 int c = 0;
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61 (void)isReady(&c);
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62 return c;
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63 }
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64
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65 const ZoomConstraint *getZoomConstraint() const override { return &m_zoomConstraint; }
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66
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67 sv_frame_t getFrameCount() const override;
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68 int getChannelCount() const override;
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69 sv_samplerate_t getSampleRate() const override;
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70 sv_samplerate_t getNativeRate() const override;
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71
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72 QString getTitle() const override;
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73 QString getMaker() const override;
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74 QString getLocation() const override;
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75
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76 QString getLocalFilename() const;
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77
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78 float getValueMinimum() const override { return -1.0f; }
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79 float getValueMaximum() const override { return 1.0f; }
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80
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81 sv_frame_t getStartFrame() const override { return m_startFrame; }
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82 sv_frame_t getTrueEndFrame() const override { return m_startFrame + getFrameCount(); }
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83
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84 void setStartFrame(sv_frame_t startFrame) override { m_startFrame = startFrame; }
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85
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86 floatvec_t getData(int channel, sv_frame_t start, sv_frame_t count) const override;
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87
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88 std::vector<floatvec_t> getMultiChannelData(int fromchannel, int tochannel, sv_frame_t start, sv_frame_t count) const override;
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89
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90 int getSummaryBlockSize(int desired) const override;
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91
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92 void getSummaries(int channel, sv_frame_t start, sv_frame_t count,
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93 RangeBlock &ranges,
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94 int &blockSize) const override;
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95
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96 Range getSummary(int channel, sv_frame_t start, sv_frame_t count) const override;
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97
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98 QString getTypeName() const override { return tr("Wave File"); }
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99
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100 void toXml(QTextStream &out,
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101 QString indent = "",
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102 QString extraAttributes = "") const override;
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103
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104 protected slots:
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105 void fillTimerTimedOut();
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106 void cacheFilled();
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107
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108 protected:
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109 void initialize();
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110
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111 class RangeCacheFillThread : public Thread
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112 {
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113 public:
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114 RangeCacheFillThread(ReadOnlyWaveFileModel &model) :
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115 m_model(model), m_fillExtent(0),
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116 m_frameCount(model.getFrameCount()) { }
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117
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118 sv_frame_t getFillExtent() const { return m_fillExtent; }
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119 void run() override;
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120
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121 protected:
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122 ReadOnlyWaveFileModel &m_model;
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123 sv_frame_t m_fillExtent;
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124 sv_frame_t m_frameCount;
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125 };
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126
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127 void fillCache();
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128
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129 FileSource m_source;
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130 QString m_path;
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131 AudioFileReader *m_reader;
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132 bool m_myReader;
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133
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134 sv_frame_t m_startFrame;
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135
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136 RangeBlock m_cache[2]; // interleaved at two base resolutions
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137 mutable QMutex m_mutex;
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138 RangeCacheFillThread *m_fillThread;
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139 QTimer *m_updateTimer;
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140 sv_frame_t m_lastFillExtent;
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141 mutable int m_prevCompletion;
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142 std::atomic<bool> m_exiting;
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143 static PowerOfSqrtTwoZoomConstraint m_zoomConstraint;
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144
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145 mutable floatvec_t m_directRead;
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146 mutable sv_frame_t m_lastDirectReadStart;
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147 mutable sv_frame_t m_lastDirectReadCount;
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148 mutable QMutex m_directReadMutex;
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149 };
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150
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151 #endif
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