Mercurial > hg > svcore
view data/fileio/DataFileReader.h @ 1591:6e68bd92ee21 bqaudiostream
Add flac metadata example
author | Chris Cannam |
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date | Mon, 21 Jan 2019 11:45:51 +0000 |
parents | 084ae1c213ee |
children | ad5f892c0c4d |
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/* -*- 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_H_ #define _DATA_FILE_READER_H_ #include <QString> #include <QObject> class Model; class DataFileReader : public QObject { public: /** * Return true if the file appears to be of the correct type. * * The DataFileReader will be constructed by passing a file path * to its constructor. If the file can at that time be determined * to be not of a type that this reader can read, it should return * false in response to any subsequent call to isOK(). * * If the file is apparently of the correct type, isOK() should * return true; if it turns out that the file cannot after all be * read (because it's corrupted or the detection misfired), then * the read() function may return NULL. */ virtual bool isOK() const = 0; virtual QString getError() const { return ""; } /** * Read the file and return the corresponding data model. This * function is not expected to be thread-safe or reentrant. This * function may be interactive (i.e. it's permitted to pop up * dialogs and windows and ask the user to specify any details * that can't be automatically extracted from the file). * * Return NULL if the file cannot be parsed at all (although it's * preferable to return a partial model and warn the user). * * Caller owns the returned model and must delete it after use. */ virtual Model *load() const = 0; }; #endif