andrew@0: /*
andrew@0:  *  drawMidiNotes.cpp
andrew@0:  *  midiCannamReader
andrew@0:  *
andrew@0:  *  Created by Andrew on 17/07/2011.
andrew@0:  *  Copyright 2011 QMUL. All rights reserved.
andrew@0:  *
andrew@0:  */
andrew@0: 
andrew@0: #include "drawMidiNotes.h"
andrew@0: 
andrew@0: drawMidiNotes::drawMidiNotes(){
andrew@0: 
andrew@0: 	
andrew@0: 	ticksPerScreen = 8000;
andrew@0: 	tickLocation = 0;
andrew@0: 	pulsesPerQuarternote = 240;
andrew@0: 	noteArrayIndex = 0;
andrew@0: 	noteMinimum = 30;
andrew@0: 	noteMaximum = 96;
andrew@0: 	screenWidth = ofGetWidth();
andrew@0: 	screenHeight = ofGetHeight();
andrew@0: 	noteHeight = screenHeight / (float)(noteMaximum - noteMinimum);
andrew@0: }
andrew@0: 
andrew@0: void drawMidiNotes::reset(){
andrew@0: 	noteArrayIndex = 0;
andrew@0: 	tickLocation = 0;
andrew@0: 	lastPeriodUpdateTime = ofGetElapsedTimeMillis();
andrew@0: 	
andrew@0: }
andrew@0: 
andrew@0: void drawMidiNotes::updatePlayPosition(){
andrew@0: 	double timeDifference = ofGetElapsedTimeMillis() - lastPeriodUpdateTime;
andrew@0: 	//this is time diff in milliseconds
andrew@0: 	//then we have 
andrew@0: 	double quarterNoteIntervals = (timeDifference / period);
andrew@0: 	tickLocation = quarterNoteIntervals * pulsesPerQuarternote; 
andrew@0: 
andrew@0: }
andrew@0: 
andrew@0: void drawMidiNotes::drawFile(const IntMatrix& noteOnMatrix){
andrew@0: 	int size = noteOnMatrix.size();
andrew@0: 	if (size > 0){
andrew@0: 
andrew@0: 		int numberOfScreensIn = tickLocation / ticksPerScreen;
andrew@0: 		
andrew@0: 	while (noteArrayIndex < noteOnMatrix.size() && tickLocation > noteOnMatrix[noteArrayIndex][0] )
andrew@0: 		noteArrayIndex++;
andrew@0: 	
andrew@0: 	while (noteArrayIndex > 0 && noteArrayIndex < size && tickLocation < noteOnMatrix[noteArrayIndex][0])
andrew@0: 		noteArrayIndex--;
andrew@0: 		
andrew@0: 		//need to start where we currently are in file
andrew@0: 		int maxNoteIndexToPrint	= noteArrayIndex;
andrew@0: 		int minNoteIndexToPrint = noteArrayIndex;
andrew@0: 		
andrew@0: 		
andrew@0: 		while (maxNoteIndexToPrint < noteOnMatrix.size() && noteOnMatrix[maxNoteIndexToPrint][0] < (numberOfScreensIn+1)*ticksPerScreen )
andrew@0: 			maxNoteIndexToPrint++;
andrew@0: 		
andrew@0: 		while (minNoteIndexToPrint > 0 && minNoteIndexToPrint < size && noteOnMatrix[minNoteIndexToPrint][0] > numberOfScreensIn*ticksPerScreen)
andrew@0: 			minNoteIndexToPrint--;
andrew@0: 		
andrew@0: 		
andrew@0: 		for (int tmpIndex = minNoteIndexToPrint;tmpIndex < maxNoteIndexToPrint;tmpIndex++){
andrew@0: 		int xLocation = (float)(noteOnMatrix[tmpIndex][0] - numberOfScreensIn*ticksPerScreen)*screenWidth/(float)ticksPerScreen;
andrew@0: 			int duration = (float)(noteOnMatrix[tmpIndex][3]*screenWidth)/(float)ticksPerScreen;
andrew@0: 			
andrew@0: 			
andrew@0: 		int yLocation = screenHeight - ((noteOnMatrix[tmpIndex][1] - noteMinimum )*screenHeight/ (float)(noteMaximum - noteMinimum));						 
andrew@0: 		ofRect(xLocation,yLocation, duration,  noteHeight);
andrew@0: 		
andrew@0: 		}
andrew@0: 		
andrew@0: 			int xLocation = (float)(tickLocation - numberOfScreensIn*ticksPerScreen)*screenWidth/(float)ticksPerScreen;
andrew@0: 		ofLine(xLocation, 0, xLocation, screenHeight);
andrew@0: 	
andrew@0: 	//	if (noteArrayIndex < size )
andrew@0: 	//		printf("tick %i :: note array :%i: %i\n", tickLocation, noteArrayIndex, noteOnMatrix[noteArrayIndex][0]);
andrew@0: 	//	else
andrew@0: 	//		printf("end of file\n");
andrew@0: 
andrew@0: 		
andrew@0: 	}	
andrew@0: 		
andrew@0: }