/[svn]/linuxsampler/trunk/src/engines/common/Event.h
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revision 53 by schoenebeck, Mon Apr 26 17:15:51 2004 UTC revision 328 by schoenebeck, Sat Dec 25 21:58:58 2004 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck         *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *                                                                         *   *                                                                         *
7   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
8   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# 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 71  namespace LinuxSampler { Line 71  namespace LinuxSampler {
71                  type_note_off,                  type_note_off,
72                  type_pitchbend,                  type_pitchbend,
73                  type_control_change,                  type_control_change,
74                    type_sysex,           ///< MIDI system exclusive message
75                  type_cancel_release,  ///< transformed either from a note-on or sustain-pedal-down event                  type_cancel_release,  ///< transformed either from a note-on or sustain-pedal-down event
76                  type_release          ///< transformed either from a note-off or sustain-pedal-up event                  type_release          ///< transformed either from a note-off or sustain-pedal-up event
77              } Type;              } Type;
# Line 82  namespace LinuxSampler { Line 83  namespace LinuxSampler {
83                  destination_count  ///< Total number of modulation destinations (this has to stay the last element in the enum)                  destination_count  ///< Total number of modulation destinations (this has to stay the last element in the enum)
84              };              };
85              union {              union {
86                  uint8_t Key;          ///< MIDI key number for note-on and note-off events.                  /// Note-on and note-off event specifics
87                  uint8_t Controller;   ///< MIDI controller number for control change events.                  struct _Note {
88              };                      uint8_t Key;         ///< MIDI key number of note-on / note-off event.
89              union {                      uint8_t Velocity;    ///< Trigger or release velocity of note-on / note-off event.
90                  uint8_t Velocity;     ///< Trigger or release velocity for note-on or note-off events.                      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).
91                  uint8_t Value;        ///< Value for control change events.                      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).
92              };                  } Note;
93              int16_t Pitch;            ///< Pitch value for pitchbend events.                  /// Control change event specifics
94                    struct _CC {
95              inline uint FragmentPos() {                      uint8_t Controller;  ///< MIDI controller number of control change event.
96                  if (iFragmentPos >= 0) return (uint) iFragmentPos;                      uint8_t Value;       ///< Controller Value of control change event.
97                  return (uint) (iFragmentPos = pEventGenerator->ToFragmentPos(TimeStamp));                  } CC;
98                    /// Pitchbend event specifics
99                    struct _Pitch {
100                        int16_t Pitch;       ///< Pitch value of pitchbend event.
101                    } Pitch;
102                    /// MIDI system exclusive event specifics
103                    struct _Sysex {
104                        uint Size;           ///< Data length (in bytes) of MIDI system exclusive message.
105                    } Sysex;
106                } Param;
107    
108                inline int32_t FragmentPos() {
109                    if (iFragmentPos >= 0) return iFragmentPos;
110                    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 102  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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