lbajardsilogic@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     Sonic Visualiser
lbajardsilogic@0:     An audio file viewer and annotation editor.
lbajardsilogic@0:     Centre for Digital Music, Queen Mary, University of London.
lbajardsilogic@0:     This file copyright 2006 Chris Cannam.
lbajardsilogic@0:     
lbajardsilogic@0:     This program is free software; you can redistribute it and/or
lbajardsilogic@0:     modify it under the terms of the GNU General Public License as
lbajardsilogic@0:     published by the Free Software Foundation; either version 2 of the
lbajardsilogic@0:     License, or (at your option) any later version.  See the file
lbajardsilogic@0:     COPYING included with this distribution for more information.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: #ifndef _AUDIO_FILE_READER_H_
lbajardsilogic@0: #define _AUDIO_FILE_READER_H_
lbajardsilogic@0: 
lbajardsilogic@0: #include <QString>
lbajardsilogic@0: #include "model/Model.h" // for SampleBlock
lbajardsilogic@0: 
lbajardsilogic@0: class AudioFileReader : public QObject
lbajardsilogic@0: {
lbajardsilogic@0:     Q_OBJECT
lbajardsilogic@0: 
lbajardsilogic@0: public:
lbajardsilogic@0:     virtual ~AudioFileReader() { }
lbajardsilogic@0: 
lbajardsilogic@0:     bool isOK() const { return (m_channelCount > 0); }
lbajardsilogic@0: 
lbajardsilogic@0:     virtual QString getError() const { return ""; }
lbajardsilogic@0: 
lbajardsilogic@0:     size_t getFrameCount() const { return m_frameCount; }
lbajardsilogic@0:     size_t getChannelCount() const { return m_channelCount; }
lbajardsilogic@0:     size_t getSampleRate() const { return m_sampleRate; }
lbajardsilogic@0:     
lbajardsilogic@0:     /** 
lbajardsilogic@0:      * The subclass implementations of this function must be
lbajardsilogic@0:      * thread-safe -- that is, safe to call from multiple threads with
lbajardsilogic@0:      * different arguments on the same object at the same time.
lbajardsilogic@0:      */
lbajardsilogic@0:     virtual void getInterleavedFrames(size_t start, size_t count,
lbajardsilogic@0: 				      SampleBlock &frames) const = 0;
lbajardsilogic@0: 
lbajardsilogic@0:     virtual bool isUpdating() const { return false; }
lbajardsilogic@0: 
lbajardsilogic@0: signals:
lbajardsilogic@0:     void frameCountChanged();
lbajardsilogic@0:     
lbajardsilogic@0: protected:
lbajardsilogic@0:     size_t m_frameCount;
lbajardsilogic@0:     size_t m_channelCount;
lbajardsilogic@0:     size_t m_sampleRate;
lbajardsilogic@0: };
lbajardsilogic@0: 
lbajardsilogic@0: #endif