annotate data/fileio/DataFileReaderFactory.h @ 363:0e30c8ec15a0

* Add wave file model method for reading more than one channel at once,
  avoiding ludicrously expensive backward seeks and double-reads when
  playing multi-channel files or using them as inputs to feature extraction
  plugins

/* -*- 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 _DATA_FILE_READER_FACTORY_H_
#define _DATA_FILE_READER_FACTORY_H_

#include <QString>

class DataFileReader;
class Model;

class DataFileReaderFactory
{
public:
    enum Exception { ImportCancelled };

    /**
     * Return the file extensions that we have data file readers for,
     * in a format suitable for use with QFileDialog.  For example,
     * "*.csv *.xml".
     */
    static QString getKnownExtensions();

    /**
     * Return a data file reader initialised to the file at the
     * given path, or NULL if no suitable reader for this path is
     * available or the file cannot be opened.
     * Caller owns the returned object and must delete it after use.
     */
    static DataFileReader *createReader(QString path,
					size_t mainModelSampleRate);

    /**
     * Read the given path, if a suitable reader is available.
     * Return NULL if no reader succeeded in reading this file.
     */
    static Model *load(QString path, size_t mainModelSampleRate);
};

#endif