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/*
* SineGenerator.cpp
*
* Created on: 31.03.2011
* Author: sven
*/
#ifndef SINEGENERATOR_H_
#include "SineGenerator.h"
#endif
#ifndef _GLIBCXX_IOSTREAM
#include <iostream>
#endif
#ifndef _GLIBCXX_CMATH
#include <cmath>
#endif
#ifndef _GLIBCXX_NUMERIC_LIMITS
#include <limits>
#endif
#ifndef _STRING_H
#include <string.h>
#endif
const double SineGenerator::PI=3.141592654;
SineGenerator::SineGenerator(SineGeneratorParameters& params)
:mParams(params)
{
}
SineGenerator::~SineGenerator() {
}
void SineGenerator::generateWavefile()
{
std::cout << "Freq: " << mParams.getFrequency()
<< " Amp: " << mParams.getAmplitude()
<< " Phase: " << mParams.getPhase()
<< " Length: " << mParams.getLength()
<< " File: " << mParams.getFilename()
<< std::endl;
std::ofstream wavefile;
wavefile.open(mParams.getFilename().c_str(), std::ios::out | std::ios::binary);
int filestart = wavefile.tellp();
writeWaveHeader(wavefile);
writeWaveData(wavefile);
int fileend = wavefile.tellp();
int filesize = fileend-filestart-8;
wavefile.seekp(0x4);
wavefile.write((char*) &filesize,sizeof(filesize));
wavefile.close();
std::cout << mParams.getFilename() << " written" << std::endl;
}
void SineGenerator::writeWaveHeader(std::ofstream& wavefile)
{
const char* riff = "RIFF";
const char* wave = "WAVE";
const char* fmt = "fmt ";
int size = 0;
int fmtLen = 16;
short fmtTag = 0x0001;
short channels = 0x0001;
int sampleRate = mParams.getSamplerate();
short bitsPerSample = mParams.getBitrate();
short blockAlign = channels * (bitsPerSample / 8);
int bytesPerSecond = sampleRate * blockAlign;
wavefile.write(riff,strlen(riff));
wavefile.write((char*)&size,sizeof(size));
wavefile.write(wave,strlen(wave));
wavefile.write(fmt,strlen(fmt));
wavefile.write((char*) &fmtLen,sizeof(fmtLen));
wavefile.write((char*) &fmtTag,sizeof(fmtTag));
wavefile.write((char*) &channels,sizeof(channels));
wavefile.write((char*) &sampleRate,sizeof(sampleRate));
wavefile.write((char*) &bytesPerSecond,sizeof(bytesPerSecond));
wavefile.write((char*) &blockAlign,sizeof(blockAlign));
wavefile.write((char*) &bitsPerSample,sizeof(bitsPerSample));
}
void SineGenerator::writeWaveData(std::ofstream& wavefile)
{
generateData();
const char* data = "data";
int dataLen = mData.size() * sizeof(short);
short actData = 0;
DataIter dataIter;
wavefile.write(data,strlen(data));
wavefile.write((char*) &dataLen,(sizeof(dataLen)));
for (dataIter = mData.begin(); dataIter != mData.end(); dataIter++)
{
actData = *dataIter;
wavefile.write((char*) &actData,(sizeof(actData)));
}
}
void SineGenerator::generateData()
{
double actData = 0.0;
double amp = (double)(mParams.getAmplitude()) * ((double) std::numeric_limits<short>::max()) / 100.0;
double phaseRad = (double)(mParams.getPhase()) * PI / 180.0;
double freq = (double)(mParams.getFrequency());
double twoPi = 2.0 * PI;
short actShort;
for (short second = 0; second < mParams.getLength(); second++) {
for(unsigned short actTime = 0; actTime < mParams.getSamplerate(); actTime++)
{
actData = amp * std::sin((twoPi * freq * ((double) (actTime) / (double) mParams.getSamplerate() ) ) + phaseRad);
actShort = (short) std::floor(actData+.5);
//std::cout << actTime << ". " << actData << " " << actShort << std::endl;
mData.push_back(actShort);
}
}
}
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