comparison DrumTimingLoader_OF/ofxAudioFileLoader/AudioFile.cpp @ 0:82352cfc0b23

Added files from ISMIR groove drum timing work

+/*
+ *  audioFile.cpp
+ *  audioFileLoader3
+ *
+ *  Created by Andrew on 31/07/2011.
+ *  Copyright 2011 QMUL. All rights reserved.
+ *
+ */
+
+#include "AudioFile.h"
+
+const double samplingFrequency = 44100.0;
+
+AudioFile::AudioFile(){
+	audioScaleSamples = 44100;
+	playPosition = 0;
+	
+}
+
+void AudioFile::drawAudioVectorMillis(double startTimeMillis, double endTimeMillis){
+	
+	ofBackground(255);
+	double startTimeSamples = startTimeMillis * samplingFrequency / 1000.0;
+	double endTimeSamples = endTimeMillis * samplingFrequency / 1000.0;
+	double screenHeight = ofGetHeight() ;
+	double screenWidth = ofGetWidth(); 
+	
+	ofSetColor(255,0,0);
+	double numberOfSamples = endTimeSamples - startTimeSamples;
+	double samplesPerPixel = numberOfSamples / screenWidth;
+	string samplesString = "millis : sps ";
+	samplesString += ofToString(samplesPerPixel, 2);
+	samplesString += " , \n";
+	
+	int lastSampleIndex = (int) startTimeSamples;
+	
+	for (int i = 1;i < screenWidth;i++){// && startTimeSamples + samplesPerPixel * i < endTimeSamples;i += 1){
+		int sampleIndex = (int) min((startTimeSamples + samplesPerPixel * i), (double) length-1);
+			//if (sampleIndex < 0)
+			//	sampleIndex = 0;
+		ofLine(i-1, screenHeight - (1-audioVector[sampleIndex])*screenHeight/2.0 , i, screenHeight - (1-audioVector[lastSampleIndex])*screenHeight/2.0);
+		samplesString += ofToString(audioVector[i])+"  , \n";
+		lastSampleIndex = sampleIndex;
+		
+	}
+	ofDrawBitmapString(samplesString, 20,20);	
+	
+	ofSetColor(100,100,100);
+	ofLine(screenWidth/2, 0, screenWidth/2, screenHeight);
+	
+	
+}
+
+
+
+void AudioFile::drawAudioVectorSamples(double startTimeSample, double endTimeSample){
+	
+	ofBackground(255);
+	screenHeight = ofGetHeight() ;
+	double screenWidth = ofGetWidth(); 
+	
+	ofSetColor(255,0,0);
+	double numberOfSamples = endTimeSample - startTimeSample;
+	double samplesPerPixel = numberOfSamples / screenWidth;
+	
+	double halfHeight = screenHeight/2;
+	
+	int lastSampleIndex = (int) startTimeSample;
+	/*
+	for (int i = 1;i < screenWidth;i++){// && startTimeSamples + samplesPerPixel * i < endTimeSamples;i += 1){
+		int sampleIndex = (int) (startTimeSample + samplesPerPixel * i);
+		ofLine(i-1, screenHeight - (1-audioVector[sampleIndex])*screenHeight/2.0 , i, screenHeight - (1-audioVector[lastSampleIndex])*screenHeight/2.0);
+		lastSampleIndex = sampleIndex;
+		
+	}
+	*/
+	double firstXpos = halfHeight;
+	double firstYpos = getPosition(startTimeSample);//screenHeight - ((1-audioVector[startTimeSample])*screenHeight/2.0);
+	
+	int stepSize = 1;//(int) samplesPerPixel); optimize !! XXX
+	for (int sampleIndex = startTimeSample+1;sampleIndex < min(endTimeSample, (double) length);sampleIndex+= stepSize){
+
+		double secondXpos = (sampleIndex - startTimeSample) * screenWidth/numberOfSamples;
+		double secondYpos = getPosition(sampleIndex);//screenHeight - ((1-audioVector[sampleIndex])*screenHeight/2.0);
+		ofLine(firstXpos, firstYpos, secondXpos, secondYpos);
+		
+			if (numberOfSamples < 100)
+				ofCircle(secondXpos, secondYpos, 2);
+		
+		firstXpos = secondXpos;
+		firstYpos = secondYpos;
+		
+		
+	}
+
+	string samplesString = "samples: sps " + ofToString(samplesPerPixel, 2);
+	samplesString += ", number of smaplers " + ofToString(numberOfSamples, 2);
+	samplesString += " , \n";
+	
+	
+	string textString;
+	textString = ofToString(playPosition, 1);
+	ofDrawBitmapString(textString, 20, 20);
+	ofDrawBitmapString(samplesString, 20, 60);
+
+	ofSetColor(0,0,255);
+	ofLine(0, halfHeight, screenWidth, halfHeight);
+	
+}
+/*
+double testApp::getXposition(int index, int startTimeSampleIndex){
+	if (index >= 0 && index < audioVector.size())
+		return (index - startTimeSampleIndex) * screenWidth/numberOfSamples;
+}
+*/
+double AudioFile::getPosition(int index){
+	if (index >= 0 && index < audioVector.size())
+		return screenHeight - ((1-audioVector[index])*screenHeight/2.0);
+	else
+		return screenHeight /2 ;
+}	
+
+