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/*
Copyright (C) 2001 Paul Davis
Copyright (C) 2004-2008 Grame
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __JackFrameTimer__
#define __JackFrameTimer__
#include "JackAtomicState.h"
#include "types.h"
namespace Jack
{
/*!
\brief A structure used for time management.
*/
struct JackTimer
{
jack_nframes_t fFrames;
jack_time_t fCurrentWakeup;
jack_time_t fCurrentCallback;
jack_time_t fNextWakeUp;
float fSecondOrderIntegrator;
bool fInitialized;
/* not accessed by clients */
float fFilterCoefficient; /* set once, never altered */
JackTimer();
~JackTimer()
{}
};
/*!
\brief A class using the JackAtomicState to manage jack time.
*/
class JackFrameTimer : public JackAtomicState<JackTimer>
{
private:
bool fFirstWakeUp;
void IncFrameTimeAux(jack_nframes_t nframes, jack_time_t callback_usecs, jack_time_t period_usecs);
void InitFrameTimeAux(jack_time_t callback_usecs, jack_time_t period_usecs);
public:
JackFrameTimer(): fFirstWakeUp(true)
{}
~JackFrameTimer()
{}
void InitFrameTime();
void ResetFrameTime(jack_nframes_t frames_rate, jack_time_t callback_usecs, jack_time_t period_usecs);
void IncFrameTime(jack_nframes_t nframes, jack_time_t callback_usecs, jack_time_t period_usecs);
void ReadFrameTime(JackTimer* timer);
};
} // end of namespace
#endif
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