svcore  1.9
AudioPlaySource.h
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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_PLAY_SOURCE_H_
00017 #define _AUDIO_PLAY_SOURCE_H_
00018 
00019 struct Auditionable {
00020     virtual ~Auditionable() { }
00021 };
00022 
00031 class AudioPlaySource
00032 {
00033 public:
00034     virtual ~AudioPlaySource() { }
00035 
00040     virtual void play(int startFrame) = 0;
00041 
00045     virtual void stop() = 0;
00046 
00050     virtual bool isPlaying() const = 0;
00051 
00056     virtual int getCurrentPlayingFrame() = 0;
00057 
00062     virtual bool getOutputLevels(float &left, float &right) = 0;
00063 
00068     virtual int getSourceSampleRate() const = 0;
00069 
00075     virtual int getTargetSampleRate() const = 0;
00076 
00083     virtual int getTargetBlockSize() const = 0;
00084 
00091     virtual int getTargetChannelCount() const = 0;
00092 
00097     virtual void setAuditioningEffect(Auditionable *) = 0;
00098 
00099 };
00100 
00101 #endif