106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/*
|
|
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 Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
#ifndef __JackFrameTimer__
|
|
#define __JackFrameTimer__
|
|
|
|
#include "JackAtomicState.h"
|
|
#include "JackCompilerDeps.h"
|
|
#include "types.h"
|
|
|
|
namespace Jack
|
|
{
|
|
|
|
/*!
|
|
\brief A structure used for time management.
|
|
*/
|
|
|
|
PRE_PACKED_STRUCTURE
|
|
class SERVER_EXPORT JackTimer
|
|
{
|
|
|
|
friend class JackFrameTimer;
|
|
|
|
private:
|
|
|
|
jack_nframes_t fFrames;
|
|
jack_time_t fCurrentWakeup;
|
|
jack_time_t fCurrentCallback;
|
|
jack_time_t fNextWakeUp;
|
|
float fPeriodUsecs;
|
|
float fFilterOmega; /* set once, never altered */
|
|
bool fInitialized;
|
|
|
|
public:
|
|
|
|
JackTimer();
|
|
~JackTimer()
|
|
{}
|
|
|
|
jack_nframes_t Time2Frames(jack_time_t time, jack_nframes_t buffer_size);
|
|
jack_time_t Frames2Time(jack_nframes_t frames, jack_nframes_t buffer_size);
|
|
jack_nframes_t FramesSinceCycleStart(jack_time_t cur_time, jack_nframes_t frames_rate);
|
|
int GetCycleTimes(jack_nframes_t* current_frames, jack_time_t* current_usecs, jack_time_t* next_usecs, float* period_usecs);
|
|
|
|
jack_nframes_t CurFrame()
|
|
{
|
|
return fFrames;
|
|
}
|
|
|
|
jack_time_t CurTime()
|
|
{
|
|
return fCurrentWakeup;
|
|
}
|
|
|
|
} POST_PACKED_STRUCTURE;
|
|
|
|
/*!
|
|
\brief A class using the JackAtomicState to manage jack time.
|
|
*/
|
|
|
|
PRE_PACKED_STRUCTURE
|
|
class SERVER_EXPORT JackFrameTimer : public JackAtomicState<JackTimer>
|
|
{
|
|
|
|
private:
|
|
|
|
bool fFirstWakeUp;
|
|
void IncFrameTimeAux(jack_nframes_t buffer_size, 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_time_t callback_usecs);
|
|
void IncFrameTime(jack_nframes_t buffer_size, jack_time_t callback_usecs, jack_time_t period_usecs);
|
|
void ReadFrameTime(JackTimer* timer);
|
|
|
|
} POST_PACKED_STRUCTURE;
|
|
|
|
|
|
} // end of namespace
|
|
|
|
#endif
|