comparison data/model/WaveFileModel.h @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 Chris Cannam and QMUL.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _WAVE_FILE_MODEL_H_
+#define _WAVE_FILE_MODEL_H_
+
+#include "base/Thread.h"
+#include <QMutex>
+#include <QTimer>
+
+#include "RangeSummarisableTimeValueModel.h"
+#include "PowerOfSqrtTwoZoomConstraint.h"
+
+#include <stdlib.h>
+
+class AudioFileReader;
+
+class WaveFileModel : public RangeSummarisableTimeValueModel
+{
+    Q_OBJECT
+
+public:
+    WaveFileModel(QString path);
+    WaveFileModel(QString path, QString originalLocation);
+    WaveFileModel(QString originalLocation, AudioFileReader *reader);
+    ~WaveFileModel();
+
+    bool isOK() const;
+    bool isReady(int *) const;
+
+    const ZoomConstraint *getZoomConstraint() const { return &m_zoomConstraint; }
+
+    size_t getFrameCount() const;
+    size_t getChannelCount() const;
+    size_t getSampleRate() const;
+
+    virtual Model *clone() const;
+
+    float getValueMinimum() const { return -1.0f; }
+    float getValueMaximum() const { return  1.0f; }
+
+    virtual size_t getStartFrame() const { return 0; }
+    virtual size_t getEndFrame() const { return getFrameCount(); }
+
+    virtual size_t getValues(int channel, size_t start, size_t end,
+			     float *buffer) const;
+
+    virtual size_t getValues(int channel, size_t start, size_t end,
+			     double *buffer) const;
+
+    virtual void getRanges(size_t channel, size_t start, size_t end,
+                           RangeBlock &ranges,
+                           size_t &blockSize) const;
+
+    virtual Range getRange(size_t channel, size_t start, size_t end) const;
+
+    virtual void toXml(QTextStream &out,
+                       QString indent = "",
+                       QString extraAttributes = "") const;
+
+    virtual QString toXmlString(QString indent = "",
+				QString extraAttributes = "") const;
+
+signals:
+    void modelChanged();
+    void modelChanged(size_t, size_t);
+    void completionChanged();
+
+protected slots:
+    void fillTimerTimedOut();
+    void cacheFilled();
+    
+protected:
+    void initialize();
+
+    class RangeCacheFillThread : public Thread
+    {
+    public:
+        RangeCacheFillThread(WaveFileModel &model) :
+	    m_model(model), m_fillExtent(0),
+            m_frameCount(model.getFrameCount()) { }
+    
+	size_t getFillExtent() const { return m_fillExtent; }
+        virtual void run();
+
+    protected:
+        WaveFileModel &m_model;
+	size_t m_fillExtent;
+        size_t m_frameCount;
+    };
+         
+    void fillCache();
+    
+    QString m_path;
+    AudioFileReader *m_reader;
+    bool m_myReader;
+
+    RangeBlock m_cache[2]; // interleaved at two base resolutions
+    mutable QMutex m_mutex;
+    RangeCacheFillThread *m_fillThread;
+    QTimer *m_updateTimer;
+    size_t m_lastFillExtent;
+    bool m_exiting;
+    static PowerOfSqrtTwoZoomConstraint m_zoomConstraint;
+};    
+
+#endif