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74 lines
2.0 KiB
74 lines
2.0 KiB
/*
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Copyright (C) 2002 Stefan Westerfeld
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stefan@space.twc.de
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef AUDIOTIMER_H
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#define AUDIOTIMER_H
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#include "artsmidi.h"
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#include "artsflow.h"
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#include "stdsynthmodule.h"
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#include "miditimercommon.h"
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#include "flowsystem.h"
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namespace Arts {
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/**
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* EXPERIMENTAL (this interface will probably not stay this way) way to handle
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* audio based time stamps. Callback interface.
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*/
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class AudioTimerCallback {
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public:
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virtual void updateTime() = 0;
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};
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/**
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* EXPERIMENTAL (this interface will probably not stay this way) way to handle
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* audio based time stamps. Timer class for audio timestamps.
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*/
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class AudioTimer : public SynthModule_skel, public StdSynthModule
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/* we are a SynthModule to get the timing */
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{
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protected:
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AudioTimer();
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virtual ~AudioTimer();
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std::list<AudioTimerCallback *> callbacks;
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long samples; /* at most samplingRate, overflow goes in seconds */
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long seconds;
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public:
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// allocation: share one AudioTimer for everbody who needs one
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static AudioTimer *subscribe();
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void unsubscribe() { _release(); }
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void notify(const Notification& n);
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TimeStamp time();
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void calculateBlock(unsigned long samples);
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void addCallback(AudioTimerCallback *callback);
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void removeCallback(AudioTimerCallback *callback);
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};
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}
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#endif
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