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