Jack2  1.9.9
JackTimedDriver.h
1 /*
2 Copyright (C) 2001 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 General Public License as published by
7 the Free Software Foundation; either version 2 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 General Public License for more details.
14 
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 
19 */
20 
21 #ifndef __JackTimedDriver__
22 #define __JackTimedDriver__
23 
24 #include "JackAudioDriver.h"
25 
26 namespace Jack
27 {
28 
33 class SERVER_EXPORT JackTimedDriver : public JackAudioDriver
34 {
35  protected:
36 
37  int fCycleCount;
38  jack_time_t fAnchorTimeUsec;
39 
40  int FirstCycle(jack_time_t cur_time);
41  int CurrentCycle(jack_time_t cur_time);
42 
43  void ProcessWait();
44 
45  public:
46 
47  JackTimedDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
48  : JackAudioDriver(name, alias, engine, table), fCycleCount(0), fAnchorTimeUsec(0)
49  {}
50  virtual ~JackTimedDriver()
51  {}
52 
53  // BufferSize can be changed
54  bool IsFixedBufferSize()
55  {
56  return false;
57  }
58 
59  int Start();
60 
61 };
62 
63 class SERVER_EXPORT JackWaiterDriver : public JackTimedDriver
64 {
65 
66  public:
67 
68  JackWaiterDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
69  : JackTimedDriver(name, alias, engine, table)
70  {}
71  virtual ~JackWaiterDriver()
72  {}
73 
74  virtual int ProcessNull();
75 
76 };
77 
78 } // end of namespace
79 
80 #endif
The timed driver.
Inter process synchronization using using Mach semaphore.
Locked Engine, access to methods is serialized using a mutex.
The base class for audio drivers: drivers with audio ports.