annotate data/fileio/AudioFileReader.h @ 228:f02989f7e160

...
author Chris Cannam
date Mon, 12 Feb 2007 13:09:31 +0000
parents 570794f6f6a7
children e08f486e8d8c
rev   line source
Chris@148 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@148 2
Chris@148 3 /*
Chris@148 4 Sonic Visualiser
Chris@148 5 An audio file viewer and annotation editor.
Chris@148 6 Centre for Digital Music, Queen Mary, University of London.
Chris@148 7 This file copyright 2006 Chris Cannam.
Chris@148 8
Chris@148 9 This program is free software; you can redistribute it and/or
Chris@148 10 modify it under the terms of the GNU General Public License as
Chris@148 11 published by the Free Software Foundation; either version 2 of the
Chris@148 12 License, or (at your option) any later version. See the file
Chris@148 13 COPYING included with this distribution for more information.
Chris@148 14 */
Chris@148 15
Chris@148 16 #ifndef _AUDIO_FILE_READER_H_
Chris@148 17 #define _AUDIO_FILE_READER_H_
Chris@148 18
Chris@148 19 #include <QString>
Chris@150 20 #include "model/Model.h" // for SampleBlock
Chris@148 21
Chris@175 22 class AudioFileReader : public QObject
Chris@148 23 {
Chris@175 24 Q_OBJECT
Chris@175 25
Chris@148 26 public:
Chris@148 27 virtual ~AudioFileReader() { }
Chris@148 28
Chris@148 29 bool isOK() const { return (m_channelCount > 0); }
Chris@148 30
Chris@148 31 virtual QString getError() const { return ""; }
Chris@148 32
Chris@148 33 size_t getFrameCount() const { return m_frameCount; }
Chris@148 34 size_t getChannelCount() const { return m_channelCount; }
Chris@148 35 size_t getSampleRate() const { return m_sampleRate; }
Chris@148 36
Chris@148 37 /**
Chris@148 38 * The subclass implementations of this function must be
Chris@148 39 * thread-safe -- that is, safe to call from multiple threads with
Chris@148 40 * different arguments on the same object at the same time.
Chris@148 41 */
Chris@148 42 virtual void getInterleavedFrames(size_t start, size_t count,
Chris@148 43 SampleBlock &frames) const = 0;
Chris@175 44
Chris@176 45 virtual bool isUpdating() const { return false; }
Chris@176 46
Chris@175 47 signals:
Chris@175 48 void frameCountChanged();
Chris@148 49
Chris@148 50 protected:
Chris@148 51 size_t m_frameCount;
Chris@148 52 size_t m_channelCount;
Chris@148 53 size_t m_sampleRate;
Chris@148 54 };
Chris@148 55
Chris@148 56 #endif