Jack2  1.9.10
JackFreewheelDriver.cpp
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 #include "JackSystemDeps.h"
22 #include "JackFreewheelDriver.h"
23 #include "JackEngineControl.h"
24 #include "JackLockedEngine.h"
25 
26 namespace Jack
27 {
28 
29 // When used in "master" mode
30 
31 int JackFreewheelDriver::Process()
32 {
33  jack_log("JackFreewheelDriver::Process master %lld", fEngineControl->fTimeOutUsecs);
34  JackDriver::CycleTakeBeginTime();
35 
36  if (fEngine->Process(fBeginDateUst, fEndDateUst)) {
37 
38  // Resume connected clients in the graph
39  if (ResumeRefNum() < 0) {
40  jack_error("JackFreewheelDriver::Process: ResumeRefNum error");
41  }
42 
43  // Special "SuspendRefNum" with longer timeout
44  if (SuspendRefNum() < 0) { // Wait for all clients to finish for FREEWHEEL_DRIVER_TIMEOUT sec
45  jack_error("JackFreewheelDriver::Process: SuspendRefNum error");
46  }
47 
48  } else { // Graph not finished: do not activate it
49  jack_error("JackFreewheelDriver::Process: Process error");
50  }
51 
52  return 0;
53 }
54 
55 // When used in "slave" mode
56 
57 int JackFreewheelDriver::ProcessReadSync()
58 {
59  // Resume connected clients in the graph
60  if (ResumeRefNum() < 0) { // Signal all clients
61  jack_error("JackFreewheelDriver::ProcessReadSync: ResumeRefNum error");
62  return -1;
63  }
64  return 0;
65 }
66 
67 int JackFreewheelDriver::ProcessWriteSync()
68 {
69  // Generic "SuspendRefNum" here
70  if (JackDriver::SuspendRefNum() < 0) {
71  jack_error("JackFreewheelDriver::ProcessSync: SuspendRefNum error");
72  return -1;
73  }
74  return 0;
75 }
76 
77 int JackFreewheelDriver::ProcessReadAsync()
78 {
79  // Resume connected clients in the graph
80  if (ResumeRefNum() < 0) { // Signal all clients
81  jack_error("JackFreewheelDriver::ProcessReadAsync: ResumeRefNum error");
82  return -1;
83  }
84  return 0;
85 }
86 
87 int JackFreewheelDriver::ProcessWriteAsync()
88 {
89  return 0;
90 }
91 
92 int JackFreewheelDriver::SuspendRefNum()
93 {
94  return fGraphManager->SuspendRefNum(&fClientControl, fSynchroTable, FREEWHEEL_DRIVER_TIMEOUT * 1000000);
95 }
96 
97 } // end of namespace