Jack2  1.9.9
JackEngineControl.h
1 /*
2 Copyright (C) 2003 Paul Davis
3 Copyright (C) 2004-2008 Grame
4 
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
9 
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
14 
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 
19 */
20 
21 #ifndef __JackEngineControl__
22 #define __JackEngineControl__
23 
24 #include "JackShmMem.h"
25 #include "JackFrameTimer.h"
26 #include "JackTransportEngine.h"
27 #include "JackConstants.h"
28 #include "types.h"
29 #include <stdio.h>
30 
31 #ifdef JACK_MONITOR
32 #include "JackEngineProfiling.h"
33 #endif
34 
35 namespace Jack
36 {
37 
38 class JackClientInterface;
39 class JackGraphManager;
40 
41 #define JACK_ENGINE_ROLLING_COUNT 32
42 #define JACK_ENGINE_ROLLING_INTERVAL 1024
43 
48 PRE_PACKED_STRUCTURE
49 struct SERVER_EXPORT JackEngineControl : public JackShmMem
50 {
51  // Shared state
52  jack_nframes_t fBufferSize;
53  jack_nframes_t fSampleRate;
54  bool fSyncMode;
55  bool fTemporary;
56  jack_time_t fPeriodUsecs;
57  jack_time_t fTimeOutUsecs;
58  float fMaxDelayedUsecs;
59  float fXrunDelayedUsecs;
60  bool fTimeOut;
61  bool fRealTime;
62  bool fSavedRealTime; // RT state saved and restored during Freewheel mode
63  int fServerPriority;
64  int fClientPriority;
65  int fMaxClientPriority;
66  char fServerName[JACK_SERVER_CONTROL_NAME_SIZE];
67  JackTransportEngine fTransport;
68  jack_timer_type_t fClockSource;
69  int fDriverNum;
70  bool fVerbose;
71 
72  // CPU Load
73  jack_time_t fPrevCycleTime;
74  jack_time_t fCurCycleTime;
75  jack_time_t fSpareUsecs;
76  jack_time_t fMaxUsecs;
77  jack_time_t fRollingClientUsecs[JACK_ENGINE_ROLLING_COUNT];
78  unsigned int fRollingClientUsecsCnt;
79  int fRollingClientUsecsIndex;
80  int fRollingInterval;
81  float fCPULoad;
82 
83  // For OSX thread
84  UInt64 fPeriod;
85  UInt64 fComputation;
86  UInt64 fConstraint;
87 
88  // Timer
89  JackFrameTimer fFrameTimer;
90 
91 #ifdef JACK_MONITOR
92  JackEngineProfiling fProfiler;
93 #endif
94 
95  JackEngineControl(bool sync, bool temporary, long timeout, bool rt, long priority, bool verbose, jack_timer_type_t clock, const char* server_name)
96  {
97  fBufferSize = 512;
98  fSampleRate = 48000;
99  fPeriodUsecs = jack_time_t(1000000.f / fSampleRate * fBufferSize);
100  fSyncMode = sync;
101  fTemporary = temporary;
102  fTimeOut = (timeout > 0);
103  fTimeOutUsecs = timeout * 1000;
104  fRealTime = rt;
105  fSavedRealTime = false;
106  fServerPriority = priority;
107  fClientPriority = (rt) ? priority - 5 : 0;
108  fMaxClientPriority = (rt) ? priority - 1 : 0;
109  fVerbose = verbose;
110  fPrevCycleTime = 0;
111  fCurCycleTime = 0;
112  fSpareUsecs = 0;
113  fMaxUsecs = 0;
114  ResetRollingUsecs();
115  strncpy(fServerName, server_name, sizeof(fServerName));
116  fPeriod = 0;
117  fComputation = 0;
118  fConstraint = 0;
119  fMaxDelayedUsecs = 0.f;
120  fXrunDelayedUsecs = 0.f;
121  fClockSource = clock;
122  fDriverNum = 0;
123  }
124 
126  {}
127 
128  void UpdateTimeOut()
129  {
130  fPeriodUsecs = jack_time_t(1000000.f / fSampleRate * fBufferSize); // In microsec
131  if (!(fTimeOut && fTimeOutUsecs > 2 * fPeriodUsecs)) {
132  fTimeOutUsecs = 2 * fPeriodUsecs;
133  }
134  }
135 
136  // Cycle
137  void CycleIncTime(jack_time_t callback_usecs)
138  {
139  // Timer
140  fFrameTimer.IncFrameTime(fBufferSize, callback_usecs, fPeriodUsecs);
141  }
142 
143  void CycleBegin(JackClientInterface** table, JackGraphManager* manager, jack_time_t cur_cycle_begin, jack_time_t prev_cycle_end)
144  {
145  fTransport.CycleBegin(fSampleRate, cur_cycle_begin);
146  CalcCPULoad(table, manager, cur_cycle_begin, prev_cycle_end);
147 #ifdef JACK_MONITOR
148  fProfiler.Profile(table, manager, fPeriodUsecs, cur_cycle_begin, prev_cycle_end);
149 #endif
150  }
151 
152  void CycleEnd(JackClientInterface** table)
153  {
154  fTransport.CycleEnd(table, fSampleRate, fBufferSize);
155  }
156 
157  // Timer
158  void InitFrameTime()
159  {
160  fFrameTimer.InitFrameTime();
161  }
162 
163  void ResetFrameTime(jack_time_t callback_usecs)
164  {
165  fFrameTimer.ResetFrameTime(callback_usecs);
166  }
167 
168  void ReadFrameTime(JackTimer* timer)
169  {
170  fFrameTimer.ReadFrameTime(timer);
171  }
172 
173  // XRun
174  void NotifyXRun(jack_time_t callback_usecs, float delayed_usecs);
175  void ResetXRun()
176  {
177  fMaxDelayedUsecs = 0.f;
178  }
179 
180  // Private
181  void CalcCPULoad(JackClientInterface** table, JackGraphManager* manager, jack_time_t cur_cycle_begin, jack_time_t prev_cycle_end);
182  void ResetRollingUsecs();
183 
184 } POST_PACKED_STRUCTURE;
185 
186 } // end of namespace
187 
188 #endif
A structure used for time management.
Graph manager: contains the connection manager and the port array.
A class using the JackAtomicState to manage jack time.
Engine control in shared memory.
The base class for shared memory management.
Definition: JackShmMem.h:125