1 files changed, 103 insertions, 0 deletions
diff --git a/Master/Modellbildung_und_Simulation/Aufgabenblatt1/Quantization/src/Quantization.cpp b/Master/Modellbildung_und_Simulation/Aufgabenblatt1/Quantization/src/Quantization.cpp
new file mode 100644
index 0000000..9198223
--- /dev/null
+++ b/Master/Modellbildung_und_Simulation/Aufgabenblatt1/Quantization/src/Quantization.cpp
@@ -0,0 +1,103 @@
+/*
+ * 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);
+	}
+}