svapp
1.9
|
00001 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ 00002 00003 /* 00004 Sonic Visualiser 00005 An audio file viewer and annotation editor. 00006 Centre for Digital Music, Queen Mary, University of London. 00007 This file copyright 2006 Chris Cannam. 00008 00009 This program is free software; you can redistribute it and/or 00010 modify it under the terms of the GNU General Public License as 00011 published by the Free Software Foundation; either version 2 of the 00012 License, or (at your option) any later version. See the file 00013 COPYING included with this distribution for more information. 00014 */ 00015 00016 #ifndef _AUDIO_CALLBACK_PLAY_TARGET_H_ 00017 #define _AUDIO_CALLBACK_PLAY_TARGET_H_ 00018 00019 #include <QObject> 00020 00021 class AudioCallbackPlaySource; 00022 00023 class AudioCallbackPlayTarget : public QObject 00024 { 00025 Q_OBJECT 00026 00027 public: 00028 AudioCallbackPlayTarget(AudioCallbackPlaySource *source); 00029 virtual ~AudioCallbackPlayTarget(); 00030 00031 virtual bool isOK() const = 0; 00032 00033 virtual void shutdown() = 0; 00034 00035 virtual double getCurrentTime() const = 0; 00036 00037 float getOutputGain() const { 00038 return m_outputGain; 00039 } 00040 00041 public slots: 00045 virtual void setOutputGain(float gain); 00046 00055 virtual void sourceModelReplaced() = 0; 00056 00057 protected: 00058 AudioCallbackPlaySource *m_source; 00059 float m_outputGain; 00060 }; 00061 00062 #endif 00063