/[svn]/linuxsampler/trunk/src/engines/common/Event.h
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revision 250 by schoenebeck, Mon Sep 20 00:31:13 2004 UTC revision 328 by schoenebeck, Sat Dec 25 21:58:58 2004 UTC
# Line 24  Line 24 
24  #define __LS_EVENT_H__  #define __LS_EVENT_H__
25    
26  #include "../../common/global.h"  #include "../../common/global.h"
27    #include "../../common/RTMath.h"
28    
29  namespace LinuxSampler {  namespace LinuxSampler {
30    
# Line 40  namespace LinuxSampler { Line 41  namespace LinuxSampler {
41              void UpdateFragmentTime(uint SamplesToProcess);              void UpdateFragmentTime(uint SamplesToProcess);
42              Event CreateEvent();              Event CreateEvent();
43          protected:          protected:
44              typedef uint32_t time_stamp_t; ///< We read the processor's cycle count register as a reference for the real time. These are of course only abstract values with arbitrary time entity, but that's not a problem as we calculate relatively.              typedef RTMath::time_stamp_t time_stamp_t;
45              inline uint ToFragmentPos(time_stamp_t TimeStamp) {              inline int32_t ToFragmentPos(time_stamp_t TimeStamp) {
46                  return uint ((TimeStamp - FragmentTime.begin) * FragmentTime.sample_ratio);                  return int32_t (int32_t(TimeStamp - FragmentTime.begin) * FragmentTime.sample_ratio);
47              }              }
48              friend class Event;              friend class Event;
49          private:          private:
# Line 53  namespace LinuxSampler { Line 54  namespace LinuxSampler {
54                  time_stamp_t end;          ///< Real time stamp of the end of this audio fragment cycle.                  time_stamp_t end;          ///< Real time stamp of the end of this audio fragment cycle.
55                  float        sample_ratio; ///< (Samples per cycle) / (Real time duration of cycle)                  float        sample_ratio; ///< (Samples per cycle) / (Real time duration of cycle)
56              } FragmentTime;              } FragmentTime;
             time_stamp_t CreateTimeStamp();  
57      };      };
58    
59      /**      /**
# Line 105  namespace LinuxSampler { Line 105  namespace LinuxSampler {
105                  } Sysex;                  } Sysex;
106              } Param;              } Param;
107    
108              inline uint FragmentPos() {              inline int32_t FragmentPos() {
109                  if (iFragmentPos >= 0) return (uint) iFragmentPos;                  if (iFragmentPos >= 0) return iFragmentPos;
110                  return (uint) (iFragmentPos = pEventGenerator->ToFragmentPos(TimeStamp));                  iFragmentPos = pEventGenerator->ToFragmentPos(TimeStamp);
111                    if (iFragmentPos < 0) iFragmentPos = 0; // if event arrived shortly before the beginning of current fragment
112                    return iFragmentPos;
113                }
114                inline void ResetFragmentPos() {
115                    iFragmentPos = -1;
116              }              }
117          protected:          protected:
118              typedef EventGenerator::time_stamp_t time_stamp_t;              typedef EventGenerator::time_stamp_t time_stamp_t;
# Line 116  namespace LinuxSampler { Line 121  namespace LinuxSampler {
121          private:          private:
122              EventGenerator* pEventGenerator; ///< Creator of the event.              EventGenerator* pEventGenerator; ///< Creator of the event.
123              time_stamp_t    TimeStamp;       ///< Time stamp of the event's occurence.              time_stamp_t    TimeStamp;       ///< Time stamp of the event's occurence.
124              int             iFragmentPos;    ///< Position in the current fragment this event refers to.              int32_t         iFragmentPos;    ///< Position in the current fragment this event refers to.
125      };      };
126    
127  } // namespace LinuxSampler  } // namespace LinuxSampler
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