/[svn]/linuxsampler/trunk/src/engines/common/Event.h
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revision 246 by schoenebeck, Sun Sep 19 14:12:55 2004 UTC revision 412 by schoenebeck, Sat Feb 26 22:44:51 2005 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    #include "EngineChannel.h"
29    
30  namespace LinuxSampler {  namespace LinuxSampler {
31    
# Line 40  namespace LinuxSampler { Line 42  namespace LinuxSampler {
42              void UpdateFragmentTime(uint SamplesToProcess);              void UpdateFragmentTime(uint SamplesToProcess);
43              Event CreateEvent();              Event CreateEvent();
44          protected:          protected:
45              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;
46              inline uint ToFragmentPos(time_stamp_t TimeStamp) {              inline int32_t ToFragmentPos(time_stamp_t TimeStamp) {
47                  return uint ((TimeStamp - FragmentTime.begin) * FragmentTime.sample_ratio);                  return int32_t (int32_t(TimeStamp - FragmentTime.begin) * FragmentTime.sample_ratio);
48              }              }
49              friend class Event;              friend class Event;
50          private:          private:
# Line 53  namespace LinuxSampler { Line 55  namespace LinuxSampler {
55                  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.
56                  float        sample_ratio; ///< (Samples per cycle) / (Real time duration of cycle)                  float        sample_ratio; ///< (Samples per cycle) / (Real time duration of cycle)
57              } FragmentTime;              } FragmentTime;
             time_stamp_t CreateTimeStamp();  
58      };      };
59    
60      /**      /**
# Line 87  namespace LinuxSampler { Line 88  namespace LinuxSampler {
88                  struct _Note {                  struct _Note {
89                      uint8_t Key;         ///< MIDI key number of note-on / note-off event.                      uint8_t Key;         ///< MIDI key number of note-on / note-off event.
90                      uint8_t Velocity;    ///< Trigger or release velocity of note-on / note-off event.                      uint8_t Velocity;    ///< Trigger or release velocity of note-on / note-off event.
91                        int8_t  Layer;       ///< Layer index (usually only used if a note-on event has to be postponed, e.g. due to shortage of free voices).
92                        int8_t  ReleaseTrigger; ///< If new voice should be a release triggered voice (actually boolean field and usually only used if a note-on event has to be postponed, e.g. due to shortage of free voices).
93                  } Note;                  } Note;
94                  /// Control change event specifics                  /// Control change event specifics
95                  struct _CC {                  struct _CC {
# Line 102  namespace LinuxSampler { Line 105  namespace LinuxSampler {
105                      uint Size;           ///< Data length (in bytes) of MIDI system exclusive message.                      uint Size;           ///< Data length (in bytes) of MIDI system exclusive message.
106                  } Sysex;                  } Sysex;
107              } Param;              } Param;
108                EngineChannel* pEngineChannel; ///< Pointer to the EngineChannel where this event occured on, NULL means Engine global event (e.g. SysEx message).
109    
110              inline uint FragmentPos() {              inline int32_t FragmentPos() {
111                  if (iFragmentPos >= 0) return (uint) iFragmentPos;                  if (iFragmentPos >= 0) return iFragmentPos;
112                  return (uint) (iFragmentPos = pEventGenerator->ToFragmentPos(TimeStamp));                  iFragmentPos = pEventGenerator->ToFragmentPos(TimeStamp);
113                    if (iFragmentPos < 0) iFragmentPos = 0; // if event arrived shortly before the beginning of current fragment
114                    return iFragmentPos;
115                }
116                inline void ResetFragmentPos() {
117                    iFragmentPos = -1;
118              }              }
119          protected:          protected:
120              typedef EventGenerator::time_stamp_t time_stamp_t;              typedef EventGenerator::time_stamp_t time_stamp_t;
# Line 114  namespace LinuxSampler { Line 123  namespace LinuxSampler {
123          private:          private:
124              EventGenerator* pEventGenerator; ///< Creator of the event.              EventGenerator* pEventGenerator; ///< Creator of the event.
125              time_stamp_t    TimeStamp;       ///< Time stamp of the event's occurence.              time_stamp_t    TimeStamp;       ///< Time stamp of the event's occurence.
126              int             iFragmentPos;    ///< Position in the current fragment this event refers to.              int32_t         iFragmentPos;    ///< Position in the current fragment this event refers to.
127      };      };
128    
129  } // namespace LinuxSampler  } // namespace LinuxSampler
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