view data/fileio/WavFileReader.h @ 1833:21c792334c2e sensible-delimited-data-strings

Rewrite all the DelimitedDataString stuff so as to return vectors of individual cell strings rather than having the classes add the delimiters themselves. Rename accordingly to names based on StringExport. Take advantage of this in the CSV writer code so as to properly quote cells that contain delimiter characters.

/* -*- 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.
    
    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 SV_WAV_FILE_READER_H
#define SV_WAV_FILE_READER_H

#include "AudioFileReader.h"

#ifdef Q_OS_WIN
#include <windows.h>
#define ENABLE_SNDFILE_WINDOWS_PROTOTYPES 1
#endif

#include <sndfile.h>
#include <QMutex>

#include <set>

/**
 * Reader for audio files using libsndfile.
 *
 * This is typically intended for seekable file types that can be read
 * directly (e.g. WAV, AIFF etc).
 *
 * Compressed files supported by libsndfile (e.g. Ogg, FLAC) should
 * normally be read using DecodingWavFileReader instead (which decodes
 * to an intermediate cached file).
 */
class WavFileReader : public AudioFileReader
{
public:
    enum class Normalisation { None, Peak };

    WavFileReader(FileSource source,
                  bool fileUpdating = false,
                  Normalisation normalise = Normalisation::None);
    virtual ~WavFileReader();

    QString getLocation() const override { return m_source.getLocation(); }
    QString getError() const override { return m_error; }

    QString getTitle() const override { return m_title; }
    QString getMaker() const override { return m_maker; }
    
    QString getLocalFilename() const override { return m_path; }
    
    bool isQuicklySeekable() const override { return m_seekable; }
    
    /** 
     * Must be safe to call from multiple threads with different
     * arguments on the same object at the same time.
     */
    floatvec_t getInterleavedFrames(sv_frame_t start, sv_frame_t count) const override;
    
    static void getSupportedExtensions(std::set<QString> &extensions);
    static bool supportsExtension(QString ext);
    static bool supportsContentType(QString type);
    static bool supports(FileSource &source);

    int getDecodeCompletion() const override { return 100; }

    bool isUpdating() const override { return m_updating; }

    void updateFrameCount();
    void updateDone();

protected:
    SF_INFO m_fileInfo;
    SNDFILE *m_file;

    FileSource m_source;
    QString m_path;
    QString m_error;
    QString m_title;
    QString m_maker;

    bool m_seekable;

    mutable QMutex m_mutex;
    mutable floatvec_t m_buffer;
    mutable sv_frame_t m_lastStart;
    mutable sv_frame_t m_lastCount;

    Normalisation m_normalisation;
    float m_max;

    bool m_updating;

    floatvec_t getInterleavedFramesUnnormalised(sv_frame_t start,
                                                sv_frame_t count) const;
    float getMax() const;
};

#endif