view data/fileio/WavFileReader.h @ 1247:8f076d02569a piper

Make SVDEBUG always write to a log file -- formerly this was disabled in NDEBUG builds. I think there's little use to that, it just means that we keep adding more cerr debug output because we aren't getting the log we need. And SVDEBUG logging is not usually used in tight loops, I don't think the performance overhead is too serious.

Also update the About box.

/* -*- 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 _WAV_FILE_READER_H_
#define _WAV_FILE_READER_H_

#include "AudioFileReader.h"

#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:
    WavFileReader(FileSource source, bool fileUpdating = false);
    virtual ~WavFileReader();

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

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

    virtual int getDecodeCompletion() const { return 100; }

    bool isUpdating() const { return m_updating; }

    void updateFrameCount();
    void updateDone();

protected:
    SF_INFO m_fileInfo;
    SNDFILE *m_file;

    FileSource m_source;
    QString m_path;
    QString m_error;

    bool m_seekable;

    mutable QMutex m_mutex;
    mutable std::vector<float> m_buffer;
    mutable sv_frame_t m_lastStart;
    mutable sv_frame_t m_lastCount;

    bool m_updating;
};

#endif