1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*
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
|
