view data/fileio/DecodingWavFileReader.h @ 1376:d9511f9e04d7 dev/refactor-piper-related

Introduce some POD structs for describing an external server application and the desired libraries to load from it, and disambiguating between empty list request and invalid list request. This allows for overriding PiperVampPluginFactory behaviour for using a PluginScan to populate the list request.

/* -*- 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:
    DecodingWavFileReader(FileSource source,
                          DecodeMode decodeMode, // determines when to resample
                          CacheMode cacheMode,
                          sv_samplerate_t targetRate = 0,
                          bool normalised = false,
                          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;
    sv_frame_t m_processed;
    int m_completion;

    WavFileReader *m_original;
    ProgressReporter *m_reporter;

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

    protected:
        DecodingWavFileReader *m_reader;
    };

    DecodeThread *m_decodeThread;
};

#endif