view data/fileio/DecodingWavFileReader.h @ 875:3e6ed8a8577b tonioni

Use a sparse time-value model only for outputs with fixed bin count of 1, not for those with unknown bin count.
(Precursor to using more than one model for outputs with unknown bin count)

/* -*- 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 2007 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 _DECODING_WAV_FILE_READER_H_
#define _DECODING_WAV_FILE_READER_H_

#include "CodedAudioFileReader.h"

#include "base/Thread.h"

#include <set>

class WavFileReader;
class ProgressReporter;

class DecodingWavFileReader : public CodedAudioFileReader
{
    Q_OBJECT
public:
    enum ResampleMode {
        ResampleAtOnce, // resample the file on construction, with progress dialog
        ResampleThreaded // resample in a background thread after construction
    };

    DecodingWavFileReader(FileSource source,
                            ResampleMode resampleMode,
                            CacheMode cacheMode,
                            size_t targetRate = 0,
                            ProgressReporter *reporter = 0);
    virtual ~DecodingWavFileReader();

    virtual QString getError() const { return m_error; }
    virtual QString getLocation() const { return m_source.getLocation(); }
    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;
    bool m_cancelled;
    size_t m_processed;
    int m_completion;

    WavFileReader *m_original;
    ProgressReporter *m_reporter;

    void addBlock(const SampleBlock &frames);
    
    class DecodeThread : public Thread
    {
    public:
        DecodeThread(DecodingWavFileReader *reader) : m_reader(reader) { }
        virtual void run();

    protected:
        DecodingWavFileReader *m_reader;
    };

    DecodeThread *m_decodeThread;
};

#endif