C++ EventBuffer::insert方法代码示例

static void TumbleNoteFunction(FunctionEvent& p, EventBuffer& midiOutput) {
   static NoteEvent note;           // temporary note for placing in buffer

   TumbleParameters& param = tparam[p.charValue(0)];
   int newnote = limit(param.current + param.dir * param.n[param.pos], 0, 127);

   // turn off algorithm if someone turned the algorithm off externally
   // or if the current note is too large or too small.
   if (param.active == 0 || newnote < A0 || newnote > C7) {
      param.active = 0;
      p.off(midiOutput);
      return;
   }

   // set the parameters of the output note:
   note.setOnDur(t_time, param.d[param.pos]);   // off time holds dur
   note.setVel(param.v[param.pos]);
   note.setChan(p.getChan());
   note.setKey(newnote);
   note.activate();
   note.action(midiOutput);     // start right now, avoiding any buffer delay
   midiOutput.insert(note);     // store the note for turning off later

   // update the parameters for the tumble algorithm
   p.setOnTime(p.getOnTime() + param.i[param.pos]);
   param.current = newnote;
   param.pos++;
   if (param.pos > param.n.getSize()) {
      param.pos = 0;
   }
}

int startAlgorithm(TumbleParameters& p) {
   static FunctionEvent tn;   // a Temporary Note for copying into eventBuffer

   int ploc = storeParameters(tparam, p);
   if (ploc < 0) {
      cout << "Warning: Parameter space is full.  Not adding new algorithm"
           << endl;
      return -1;
   }

   // setting the fields of the function note
   tn.setFunction(TumbleNoteFunction);
   tn.setChannel(channel);
   tn.setKeyno(0);
   tn.setVelocity(0);
   tn.charValue(0) = (char)ploc;         // store location of the parameters
   tn.setStatus(EVENT_STATUS_ACTIVE);
   tn.setOnTime(t_time + p.i[0] - anticipation);

   // display the basic algorithm info
   cout << "Tumble: Time: " << t_time << "\tStart = " << (int)p.current
        << "\tPattern = . ";
   for (int i=1; i<p.n.getSize(); i++) {
      cout << (int)p.n[i] << " ";
   }
   cout << "(" << (int)p.n[0] << ")";
   cout << " ioi: " << p.i[0];
   cout << endl;

   return eventBuffer.insert(tn);
}

void createTrill(int key1, int key2, int velocity, int channel, int duration) {
   static FunctionEvent tn;   // a Temporary Note for copying into eventBuffer

   // key1 should always be smaller than key2
   int temp;
   if (key1 > key2) {
      temp = key1;
      key1 = key2;
      key2 = temp;
   }

   // setting the fields of the function note
   tn.setFunction(TrillAlgorithm);
   tn.setChannel(channel);
   tn.setKeyno(key1);
   tn.setVelocity(velocity);

   // set extra parameters
   tn.charValue(15) = 0;        // 0 = play key1 next, 1 = play key2 next
   tn.charValue(14) = key2;     // secondary pitch
   tn.intValue(10) = t_time;    // initialization time

   tn.setStatus(EVENT_STATUS_ACTIVE);

   // start time of function and the duration between calling it
   tn.setOnDur(t_time + duration, duration);

   eventBuffer.insert(tn);

   cout << "Trill = " << key1 << " to " << key2 
        << "\tRate = " << duration
        << endl;
}

static void EchoAlgorithm(FunctionEvent& p, EventBuffer& midiOutput) {
   static NoteEvent note;            // temporary note before placing in buffer

   // check if pausing
   if (decaystates[p.getKey()] < 0.0) {
      p.setOnTime(p.getOnTime() + p.getDur() + p.shortValue(14)); 
      return;
   }
      
   // set the parameters for the output note:
   note.setOnDur(t_time, p.getOffTime()); // off time holds dur
   note.setVel(p.getVel());
   note.setChan(p.getChan());
   note.setKey(p.getKey());

   // update the parameters for the function:
   decaystates[p.getKey()] *= decayrate;
   p.setVel((int)decaystates[p.getKey()]);

   // if note is too quiet, end the note
   if (p.getVel() <= 2) {
      p.off(midiOutput);
      decaystates[p.getKey()] = 0.0;
   }

   // next time includes a gap so that key can raise on keyboard
   p.setOnTime(p.getOnTime() + p.getDur() + p.shortValue(14)); 

   note.activate();
   note.action(midiOutput);       // start right now, avoiding any buffer delay
   midiOutput.insert(note);       // the note off message is being buffered

}

static void EnhanceFunction(FunctionEvent& p, EventBuffer& midiOutput) {
   static NoteEvent note;            // temporary note before placing in buffer

   // set the parameters for the output note:
   note.setOnDur(t_time, p.getOffTime()); // off time holds dur
   note.setVel(p.getVel());
   note.setChan(p.getChan());
   note.setKey(p.getKey());

   // if note is too quiet
   if (p.getVel() <= 5) {
      p.off(midiOutput);
   }

   // update the parameters for the function:
   p.setKey(p.getKey()+p.shortValue(14));
   p.setVel(p.getVel()-5);
   p.setOnTime(p.getOnTime() + p.getDur());  // OffTime stores duration

   note.activate();
   note.action(midiOutput);       // start right now, avoiding any buffer delay
   midiOutput.insert(note);       // the note off message is being buffered


   // check wether to kill the algorithm or not:

   // if note is off the range of the keyboard
   if (p.getKey() > C8 || p.getKey() < A0) {
      p.off(midiOutput);
   }

}

void playgliss(int basenote, int loudness, int channel, int duration, 
      int distancee) { 
   static FunctionEvent tn;   // a Temporary Note for copying into eventBuffer
   
   // setting the fields of the function note
   tn.shortValue(14) = distancee;

   tn.setFunction(EnhanceFunction);
   tn.setChannel(channel);
   tn.setKeyno(basenote + distancee);
   tn.setVelocity(loudness - 5);
 
   tn.setStatus(EVENT_STATUS_ACTIVE);

   // start time of function and the duration between calling it
   tn.setOnDur(t_time, duration);

   eventBuffer.insert(tn);

   cout << "StartKey =    "  << basenote
        << "\tLoudness =  "  << loudness
        << "\tRate =      "  << duration
        << "\tDirection = "  << distancee
        << endl;
}

void playNextPattern(EventBuffer& eventbuffer, NoteScore& score,
                     int pattern, int subpattern, double tempo) {
    if (pattern == 0 && subpattern == 3) {
        subpattern = 2;
    }
    if (pattern == 6 && subpattern == 3) {
        subpattern = 2;
    }
    int p  = pattern;
    int sp = subpattern;
    cout << "playing pattern " << pattern << (char)('a' + subpattern) << endl;

    NoteEvent note;   // temporary note for placing in buffer
    int i;
    for (i=0; i<score[pattern][subpattern].getSize(); i++) {
        if (!activevoice[score[pattern][subpattern][i].voice]) {
            continue;
        }
        note.setOnDur((int)(t_time + score[p][sp][i].start * 1000 * 60 / tempo +
                            0.5), (int)(score[p][sp][i].dur * 1000 * 60 / tempo + 0.5));
        note.setChan(CH_10);
        note.setKey(voicetokey[score[p][sp][i].voice]);
        note.setVel(score[p][sp][i].vel);
        note.activate();
        if (score[p][sp][i].start == 0.0) {
            note.action(eventbuffer);   // play starting notes now, avoiding delay
        }
        eventbuffer.insert(note);
    }
}

static void TrillAlgorithm(FunctionEvent& p, EventBuffer& midiOutput) {
   static NoteEvent note;           // temporary note before placing in buffer

   int key1 = p.getKey();           // lower key of trill
   int key2 = p.charValue(14);      // upper key of trill
   int state = p.charValue(15);     // which note to play next
   int starttime = p.intValue(10);  // when trill was started
   int i;
  
   // turn off the trill if there is a note played inside the trill
   int range1 = key1;
   int range2 = key2;
   if (range2 - range1 == 1) {
      range1--;
      range2++;
   }
   for (i=range1; i<=range2; i++) {
      if (noteontimes[i] > starttime) {
         p.off(midiOutput);
         return;
      }
   }

   // set the next note to play
   int key = state ? key2 : key1;
   state = !state;
   p.charValue(15) = state;

   // set the parameters for the output note:
   note.setOnDur(t_time, p.getDur()); 
   note.setVel(p.getVel());
   note.setChan(p.getChan());
   note.setKey(key);

   // update the parameters for the gliss function:
   p.setOnTime(p.getOnTime() + p.getDur());  
   
   int value = p.getVel() + velcorrection;
   if (value < 100 && value > 3) {
      p.setVel(value);
   }
   if (p.getDur() + trillcorrection > MINTRIGTIME) {
      p.setDur(p.getDur() + trillcorrection);
   }

   note.activate();
   note.action(midiOutput);       // start right now, avoiding any buffer delay
   midiOutput.insert(note);       // the note off message is being buffered
}

void createDecay(int channel, int key, int duration, int velocity) {
   static FunctionEvent tn;   // temporary function for copying into eventBuffer

   tn.shortValue(14) = gap;    // gap between successive notes

   tn.setFunction(EchoAlgorithm);
   tn.setChannel(channel);
   tn.setKeyno(key);
   decaystates[key] = velocity * decayrate;
   tn.setVelocity((int)decaystates[key]);
   tn.setStatus(EVENT_STATUS_ACTIVE);

   // start time of function and the duration between calling it
   tn.setOnDur(t_time, duration);

   eventBuffer.insert(tn);

   cout << "Key=    "  << key
        << "\tDuration =  "  << duration + gap
        << "\tVelocity =  "  << velocity
        << endl;
}

void playchord(MidiEvent aMessage, int chordQuality, 
      int* rhythm, int* dur) {
   int numNotes = 0;             // the number of notes to play
   NoteEvent tempNote;           // temporary Note for copying into eventBuffer
   int chordNote[4];             // the notes of the chord to be calculated
   int rootNote = aMessage.getP1(); // root of chord to be created

   chordNote[0] = rootNote;
   switch (chordQuality) {
      case DIMINISHED_TRIAD:
         chordNote[1] = rootNote + 3;  chordNote[2] = rootNote + 6;
         numNotes = 3;
         break;
      case MINOR_TRIAD:
         chordNote[1] = rootNote + 3;  chordNote[2] = rootNote + 7;
         numNotes = 3;
         break;
      case MAJOR_TRIAD:
         chordNote[1] = rootNote + 4;  chordNote[2] = rootNote + 7;
         numNotes = 3;
         break;
      case AUGMENTED_TRIAD:
         chordNote[1] = rootNote + 4;  chordNote[2] = rootNote + 8;
         numNotes = 3;
         break;
      case FULLY_DIM_7TH:
         chordNote[1] = rootNote + 3;
         chordNote[2] = rootNote + 6;
         chordNote[3] = rootNote + 9;
         numNotes = 4;
         break;
      case HALF_DIM_7TH:
         chordNote[1] = rootNote + 3;
         chordNote[2] = rootNote + 6;
         chordNote[3] = rootNote + 10;        
         numNotes = 4;
         break;
      case mm_7TH:
         chordNote[1] = rootNote + 3;
         chordNote[2] = rootNote + 7;
         chordNote[3] = rootNote + 10;        
         numNotes = 4;
         break;
      case mM_7TH:
         chordNote[1] = rootNote + 3;
         chordNote[2] = rootNote + 7;
         chordNote[3] = rootNote + 11;        
         numNotes = 4;
         break;
      case Mm_7TH:
         chordNote[1] = rootNote + 3;
         chordNote[2] = rootNote + 4;
         chordNote[3] = rootNote + 10;        
         numNotes = 4;
         break;
      case MM_7TH:
         chordNote[1] = rootNote + 4;
         chordNote[2] = rootNote + 7;
         chordNote[3] = rootNote + 10;        
         numNotes = 4;
         break;
      default:                                    // invalid quality
         return;
   }

   cout << "Chord: (";
   for (int i=0; i<numNotes; i++) {
      tempNote.setKeyno(chordNote[i]);
      if (tempNote.getKeyno() < 0 || tempNote.getKeyno() > 127)  continue;

      if (attack[i] == 0) {
         tempNote.setVelocity(aMessage.getP2());
      } else {
         tempNote.setVelocity(attack[i]);
      }

      tempNote.setOnDur(t_time+rhythm[i]+offset, dur[i]);
      tempNote.setStatus(0);                   // note hasn't been played yet
      eventBuffer.insert(&tempNote);

      cout << tempNote.getKeyno();
      if (i != numNotes-1)  cout << ",";
   }
   cout << ")" << endl;
}

void processNotes(HumdrumRecord& record) {
	NoteEvent note;
	int pitch = 0;
	double duration = 0.0;
	int staccatoQ = 0;
	int accentQ = 0;
	int sforzandoQ = 0;
	int i, j;
	int notecount = 0;
	char buffer[128] = {0};
	for (i=0; i<record.getFieldCount(); i++) {
		if ((record.getPrimaryTrack(i) < (int)trackmute.size())
				&& trackmute[record.getPrimaryTrack(i)]) {
			continue;
		}
		if (record.getExInterpNum(i) == E_KERN_EXINT) {
			notecount = record.getTokenCount(i);
			if (strcmp(record[i], ".") == 0) {
				continue;
			}
			for (j=0; j<notecount; j++) {
				record.getToken(buffer, i, j);
				if (strchr(buffer, '[')) {
					// total tied note durations
					duration = data.getTiedDuration(linenum, i, j);
				} else {
					duration = Convert::kernToDuration(buffer);
				}
				pitch = Convert::kernToMidiNoteNumber(buffer);
				// skip rests
				if (pitch < 0) {
					continue;
				}
				pitch += transpose;
				// don't play note which is transposed too extremely
				if (pitch < 0)   { continue; }
				if (pitch > 127) { continue; }

				// skip tied notes
				if (strchr(buffer, '_') || strchr(buffer, ']')) {
					continue;
				}

				accentQ    = strchr(buffer, '^')  == NULL? 0 : 1;
				sforzandoQ = strchr(buffer, 'z')  == NULL? 0 : 1;
				staccatoQ  = strchr(buffer, '\'') == NULL? 0 : 1;
				note.setChannel(0);
				note.setKey(pitch);
				note.setOnTime(t_time);
				duration = duration * 60000 / tempo / tempoScale;
				if (shortenQ) {
					duration -= shortenamount;
					if (duration < mine) {
						duration = mine;
					}
				}
				note.setDur((int)duration);
				if (staccatoQ) {
					note.setDur((int)(0.5 * note.getDur()));
				}
				note.setKey(pitch);
				if (accentQ) {
					velocity *= 1.3;
				}
				if (sforzandoQ) {
					velocity *= 1.5;
				}
				if (velocity > 127) {
					velocity = 127;
				}
				note.setVelocity(velocity);

				note.activate();
				note.action(eventBuffer);
				eventBuffer.insert(note);
			}
		}
	}
}