annotate data/fileio/MP3FileReader.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 _MP3_FILE_READER_H_
#define _MP3_FILE_READER_H_

#ifdef HAVE_MAD

#include "CodedAudioFileReader.h"

#include "base/Thread.h"
#include <mad.h>

#include <set>

class ProgressReporter;

class MP3FileReader : public CodedAudioFileReader
{
    Q_OBJECT

public:
    MP3FileReader(FileSource source,
                  DecodeMode decodeMode,
                  CacheMode cacheMode,
                  sv_samplerate_t targetRate = 0,
                  bool normalised = false,
                  ProgressReporter *reporter = 0);
    virtual ~MP3FileReader();

    virtual QString getError() const { return m_error; }

    virtual QString getLocation() const { return m_source.getLocation(); }
    virtual QString getTitle() const { return m_title; }
    virtual QString getMaker() const { return m_maker; }
    virtual TagMap getTags() const { return m_tags; }
    
    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 m_completion; }

    virtual bool isUpdating() const {
        return m_decodeThread && m_decodeThread->isRunning();
    }

public slots:
    void cancelled();

protected:
    FileSource m_source;
    QString m_path;
    QString m_error;
    QString m_title;
    QString m_maker;
    TagMap m_tags;
    sv_frame_t m_fileSize;
    double m_bitrateNum;
    int m_bitrateDenom;
    int m_completion;
    bool m_done;

    unsigned char *m_filebuffer;
    float **m_samplebuffer;
    int m_samplebuffersize;

    ProgressReporter *m_reporter;
    bool m_cancelled;

    struct DecoderData
    {
	unsigned char const *start;
	unsigned long length;
	MP3FileReader *reader;
    };

    bool decode(void *mm, sv_frame_t sz);
    enum mad_flow accept(struct mad_header const *, struct mad_pcm *);

    static enum mad_flow input(void *, struct mad_stream *);
    static enum mad_flow output(void *, struct mad_header const *, struct mad_pcm *);
    static enum mad_flow error(void *, struct mad_stream *, struct mad_frame *);

    class DecodeThread : public Thread
    {
    public:
        DecodeThread(MP3FileReader *reader) : m_reader(reader) { }
        virtual void run();

    protected:
        MP3FileReader *m_reader;
    };

    DecodeThread *m_decodeThread;

    void loadTags();
    QString loadTag(void *vtag, const char *name);
};

#endif

#endif