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/*
* Quantization.cpp
*
* Created on: 02.04.2011
* Author: sven
*/
#ifndef QUANTIZATION_H_
#include "Quantization.h"
#endif
#ifndef _GLIBCXX_FSTREAM
#include <fstream>
#endif
#ifndef _GLIBCXX_NUMERIC_LIMITS
#include <limits>
#endif
#ifndef _GLIBCXX_CMATH
#include <cmath>
#endif
#ifndef _GLIBCXX_IOSTREAM
#include <iostream>
#endif
Quantization::Quantization(QuantizationParameters& params)
:mParams(params)
{
calcQuantizationValues();
std::ifstream inFile;
std::ofstream outFile;
inFile.open(mParams.getInputFile().c_str(), std::ios::in | std::ios::binary );
outFile.open(mParams.getOutputFile().c_str(), std::ios::out | std::ios::binary);
int dataLenOffset = 0x28;
char header[dataLenOffset];
inFile.read(&header[0],dataLenOffset);
outFile.write(&header[0],dataLenOffset);
int numSamples = 0;
inFile.read((char*) &numSamples,sizeof(numSamples));
outFile.write((char*) &numSamples,sizeof(numSamples));
short data;
short quantizationized;
// unsigned counter = 0;
for (int i=0; i < numSamples;) {
inFile.read((char*) &data, sizeof(data) );
quantizationized = getQuantizationValue(data);
outFile.write((char*) &quantizationized, sizeof(quantizationized) );
// std::cout << counter++ << " " << quantizationized << std::endl;
i += sizeof(short);
}
inFile.close();
outFile.close();
std::cout << "quantization done" << std::endl;
}
Quantization::~Quantization()
{
QuantizationRangesIter it = mQuantizationRanges.begin();
for ( ;it < mQuantizationRanges.end(); )
{
delete *it++;
}
mQuantizationRanges.clear();
}
short Quantization::getQuantizationValue(short val)
{
// shift to unsigned posivitives values
unsigned short shiftedVal = val - std::numeric_limits<short>::min();
QuantizationRangesIter it = mQuantizationRanges.begin();
for(; it < mQuantizationRanges.end(); it++) {
QuantizationRange* quantRangePtr = *it;
if (quantRangePtr->IsInRange(shiftedVal)) {
// shift back
return quantRangePtr->mRangeValue + std::numeric_limits<short>::min();
}
}
std::cout << val << " " << shiftedVal << " not quantizationized" << std::endl;
return -1;
}
void Quantization::calcQuantizationValues()
{
mNumQuantizationValues = 1 << mParams.getBits();
// std::cout << mNumQuantizationValues << " quantization values" << std::endl;
unsigned short valueRangeWidth = std::numeric_limits<unsigned short>::max() / mNumQuantizationValues;
// std::cout << "value range width " << valueRangeWidth << std::endl;
unsigned short rangeMiddle = valueRangeWidth / 2;
// std::cout << "value range middle " << rangeMiddle << std::endl;
QuantizationRange* quantRangePtr = NULL;
for (unsigned i=0; i<mNumQuantizationValues; i++) {
quantRangePtr = new QuantizationRange;
quantRangePtr->mMinValue = i * valueRangeWidth;
quantRangePtr->mMaxValue = ((i+1) * valueRangeWidth) - 1;
quantRangePtr->mRangeValue = quantRangePtr->mMinValue + rangeMiddle;
quantRangePtr->mRangeWidth = valueRangeWidth;
// std::cout << "quantization value "<< (i+1) << ": " << quantRangePtr->mRangeValue << std::endl;
// std::cout << "Range: "<< quantRangePtr->mMinValue << " - " << quantRangePtr->mMaxValue << std::endl;
mQuantizationRanges.push_back(quantRangePtr);
}
}
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