Jack2 1.9.6
|
00001 /* 00002 Copyright (C) 2001 Paul Davis 00003 Copyright (C) 2004-2008 Grame 00004 00005 This program is free software; you can redistribute it and/or modify 00006 it under the terms of the GNU Lesser General Public License as published by 00007 the Free Software Foundation; either version 2.1 of the License, or 00008 (at your option) any later version. 00009 00010 This program is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 GNU Lesser General Public License for more details. 00014 00015 You should have received a copy of the GNU Lesser General Public License 00016 along with this program; if not, write to the Free Software 00017 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00018 00019 */ 00020 00021 #ifndef __JackFrameTimer__ 00022 #define __JackFrameTimer__ 00023 00024 #include "JackAtomicState.h" 00025 #include "JackCompilerDeps.h" 00026 #include "types.h" 00027 00028 namespace Jack 00029 { 00030 00035 class SERVER_EXPORT JackTimer 00036 { 00037 00038 friend class JackFrameTimer; 00039 00040 private: 00041 00042 jack_nframes_t fFrames; 00043 jack_time_t fCurrentWakeup; 00044 jack_time_t fCurrentCallback; 00045 jack_time_t fNextWakeUp; 00046 float fSecondOrderIntegrator; 00047 float fFilterCoefficient; /* set once, never altered */ 00048 bool fInitialized; 00049 00050 public: 00051 00052 JackTimer(); 00053 ~JackTimer() 00054 {} 00055 00056 jack_nframes_t Time2Frames(jack_time_t time, jack_nframes_t buffer_size); 00057 jack_time_t Frames2Time(jack_nframes_t frames, jack_nframes_t buffer_size); 00058 jack_nframes_t FramesSinceCycleStart(jack_time_t cur_time, jack_nframes_t frames_rate); 00059 00060 jack_nframes_t CurFrame() 00061 { 00062 return fFrames; 00063 } 00064 00065 jack_time_t CurTime() 00066 { 00067 return fCurrentWakeup; 00068 } 00069 00070 } POST_PACKED_STRUCTURE; 00071 00076 class SERVER_EXPORT JackFrameTimer : public JackAtomicState<JackTimer> 00077 { 00078 00079 private: 00080 00081 bool fFirstWakeUp; 00082 void IncFrameTimeAux(jack_nframes_t buffer_size, jack_time_t callback_usecs, jack_time_t period_usecs); 00083 void InitFrameTimeAux(jack_time_t callback_usecs, jack_time_t period_usecs); 00084 00085 public: 00086 00087 JackFrameTimer(): fFirstWakeUp(true) 00088 {} 00089 ~JackFrameTimer() 00090 {} 00091 00092 void InitFrameTime(); 00093 void ResetFrameTime(jack_nframes_t frames_rate, jack_time_t callback_usecs, jack_time_t period_usecs); 00094 void IncFrameTime(jack_nframes_t buffer_size, jack_time_t callback_usecs, jack_time_t period_usecs); 00095 void ReadFrameTime(JackTimer* timer); 00096 00097 } POST_PACKED_STRUCTURE; 00098 00099 00100 } // end of namespace 00101 00102 #endif