Merge branch 'branchflorian'

imageInput.c

@@ -6,17 +6,149 @@
 #define BUFFER_SIZE 100
 #define FILE_HEADER_STRING "__info2_image_file_format__"
 
-// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
 
-// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
+// DONE Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
+unsigned int    readStatusInfo      (FILE *const source, GrayScaleImageSeries *const series, char *const headerString, int const sizeToRead, int const amountToRead);
+void            readImagedata       (FILE *const source, GrayScaleImageSeries *const series, int const amountToRead);
+unsigned int    checkHeaderString   (const char *const header);
+
+
+// DONE Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {
-    GrayScaleImageSeries *series = NULL;
+    GrayScaleImageSeries *series                                        = NULL;
+    FILE                    *readSource                                 = 0;
+    const unsigned int      sizeOfStausInfoElementsInBytes              = 2;
+    const unsigned int      amountOfStatusInfoToRead                    = 1;
+    unsigned int            numberOfBytesToRead                         = 0;
+    unsigned int            expectedHeader                              = 0;
+    char                    headerString[sizeof(FILE_HEADER_STRING)]    = "";
+    
+    
+    readSource = fopen(path, "rb");
+    
+    if (readSource != NULL)
+    {
+        series                  = calloc(sizeof(unsigned int) + 3* sizeof(headerString),  amountOfStatusInfoToRead);
+        series->images          = calloc(2*sizeof(unsigned int) + sizeof(headerString),  amountOfStatusInfoToRead);
+        
+        numberOfBytesToRead     = readStatusInfo(readSource, series, headerString, sizeOfStausInfoElementsInBytes, amountOfStatusInfoToRead);
+        
+        expectedHeader          = checkHeaderString(headerString);
+
+        series->images->buffer  = calloc((series->count) * numberOfBytesToRead, sizeof(GrayScalePixelType));
+        series->labels          = calloc((series->count),                       sizeof(&(series->labels)));
+
+        if (expectedHeader)
+        {
+            // reallocate memory so that each image width can be saved seperately
+            series->images      = realloc(series->images, series->count * 2 * sizeof(unsigned int) + sizeof(headerString));
+            
+            for (int i = 0; i < series->count; i++)
+            {
+                series->images[i].width     = series->images->width;
+                series->images[i].height    = series->images->height;
+            }
+            
+            readImagedata(readSource, series, numberOfBytesToRead);
+        }
+        else
+        {
+            series = NULL;
+        }
+        
+        fclose(readSource);
+    }
     
     return series;
 }
 
-// TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
+
-void clearSeries(GrayScaleImageSeries *series)
+// DONE Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
+void clearSeries(GrayScaleImageSeries * series)
 {
+    int i = 0;
+
+    
+    // Write NULL into all memory spaces
+    for (i = 0; i < ((series->count) * (series->images->width) * (series->images->height) / 4); i++)
+    {   
+        *(series->images->buffer + i * 4 * (series->images->width) * (series->images->height)) = '\0';
+    }
+    
+    for (i = 0; i < (series->count); i++)
+    {
+        *(series->labels + i) = '\0';
+    }
+    
+    series->count           = 0;
+    series->images->width   = 0;
+    series->images->height  = 0;
+
+    // Closse all allocated memory
+    // AND write NULL into every pointer
+    // so they can't be accessed
+    free(series->images->buffer);
+    series->images->buffer  = NULL;
+    free(series->labels);
+    series->labels          = NULL;
+    free(series->images);
+    series->images          = NULL;
+    free(series);
+    series                  = NULL;
+
 }
+
+
+//  reads headerString, pictureCount, pictureWidth, pictureHight
+unsigned int readStatusInfo(FILE *const source, GrayScaleImageSeries *const series, char *const headerString, int const sizeToRead, int const amountToRead)
+{
+    unsigned int bytesToRead = 0;
+
+
+    fread(headerString,                 sizeof(FILE_HEADER_STRING) - 1,     amountToRead, source);
+    fread(&(series->count),             sizeToRead,                         amountToRead, source);
+    fread(&(series->images->width),     sizeToRead,                         amountToRead, source);
+    fread(&(series->images->height),    sizeToRead,                         amountToRead, source);
+
+    bytesToRead = (series->images->width) * (series->images->height);
+
+
+    return bytesToRead;
+}
+
+
+//  reads the imagebytes and the label of all images
+void readImagedata(FILE *const source, GrayScaleImageSeries *const series,  int const amountOfBytes)
+{
+    int i = 0;
+
+
+    for (i = 0; i < series->count ; i++)
+    {
+        fread(&(series->images->buffer[i]), sizeof(*series->images->buffer), amountOfBytes,             source);
+        fread(&(series->labels[i]),         sizeof(*series->images->buffer), sizeof(*series->labels),   source);
+    }
+}
+
+
+// checks if the read headerString matches the expected headerString
+unsigned int checkHeaderString(const char *const header)
+{
+    int i                                           = 0;
+    int notIdenticall                               = 0;
+    char expectedHeader[sizeof(FILE_HEADER_STRING)] = FILE_HEADER_STRING;
+
+
+    for (i = 0; i < sizeof(FILE_HEADER_STRING); i++)
+    {
+        if (header[i] != expectedHeader[i])
+        {
+            notIdenticall = 1;
+        }
+    }
+    
+
+    return !notIdenticall;
+}
+

imageInputTests.c

@@ -14,7 +14,6 @@ static void prepareImageFile(const char *path, unsigned short int width, unsigne
     {
         const char *fileTag = "__info2_image_file_format__";
         GrayScalePixelType *zeroBuffer = (GrayScalePixelType *)calloc(numberOfImages * width * height, sizeof(GrayScalePixelType));
-
         if(zeroBuffer != NULL)
         {
             fwrite(fileTag, sizeof(fileTag[0]), strlen(fileTag), file);

matrix.c

@@ -6,30 +6,122 @@
 
 Matrix createMatrix(unsigned int rows, unsigned int cols)
 {
+    Matrix matrix;
 
+    matrix.rows = rows;
+    matrix.cols = cols;
+    matrix.buffer = malloc(rows * cols * sizeof(float));
+
+    if(matrix.buffer == NULL)
+    {
+        printf("Fehler bei der Speicherreservierung! Keine Matrix erstellt!");
+        matrix.rows = 0;
+        matrix.cols = 0;
+    }
+
+    return matrix;
 }
 
 void clearMatrix(Matrix *matrix)
 {
+    free(matrix.buffer);
 
+    matrix->buffer = NULL;
+    matrix->rows = 0;
+    matrix->cols = 0;
 }
 
-void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
+void setMatrixAt(MatrixType value, Matrix *matrix, unsigned int rowIdx, unsigned int colIdx)
 {
+    if(matrix->buffer == NULL)
+    {
+        printf("Fehler beim Setzen! Matrix nicht initialisiert");
+        return;
+    }
 
+    if(rowIdx >= matrix->rows || colIdx >= matrix->cols)
+    {
+        printf("Ungueltige Indizes beim Setzen!\n");
+        return;
+    }
+
+    matrix->buffer[rowIdx * matrix->cols + colIdx] = value;
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
+    if(matrix.buffer == NULL)
+    {
+        printf("Fehler beim Lesen! Matrix nicht initialisiert");
+        return 0;
+    }
 
+    if(rowIdx >= matrix.rows || colIdx >= matrix.cols)
+    {
+        printf("Ungueltige Indizes beim Lesen!\n");
+        return 0;
+    }
+
+    return matrix.buffer[rowIdx * matrix.cols + colIdx];
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
+    if((matrix1.rows != matrix2.rows) || (matrix1.cols != matrix2.cols))
+    {
+        printf("Fehler bei Addition: Matrix Dimensionen passen nicht ueberein!\n");
+        Matrix empty = {0, 0, NULL};
+        return empty;
+    }
 
+    float matrix1Wert = 0;
+    float matrix2Wert = 0;
+    float summe = 0;
+
+    Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix1.cols);
+
+    for(int row = 0; row < ergebnisMatrix.rows; row++)
+    {
+        for(int col = 0; col < ergebnisMatrix.cols; col++)
+        {
+            matrix1Wert = getMatrixAt(matrix1, row, col);
+            matrix2Wert = getMatrixAt(matrix2, row, col);
+            summe = matrix1Wert + matrix2Wert;
+
+            setMatrixAt(summe, &ergebnisMatrix, row, col);
+        }
+    }
+
+    return ergebnisMatrix;
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
+    if(matrix1.cols != matrix2.rows)
+    {
+        printf("Fehler bei Multiplikation: Matrix Dimensionen passen nicht ueberein!\n");
+        Matrix empty = {0, 0, NULL};
+        return empty;
+    }
 
+    float erg = 0;
+
+    Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix2.cols);
+
+    for(int row = 0; row < ergebnisMatrix.rows; row++)
+    {
+        for(int col = 0; col < ergebnisMatrix.cols; col++)
+        {
+            erg = 0;
+
+            for(int k = 0; k < matrix1.cols; k++)
+            {
+                erg += getMatrixAt(matrix1, row, k) * getMatrixAt(matrix2, k, col);
+            }
+
+            setMatrixAt(erg, &ergebnisMatrix, row, col);
+        }
+    }
+
+    return ergebnisMatrix;
 }

matrix.h

@@ -6,7 +6,12 @@
 typedef float MatrixType;
 
 // TODO Matrixtyp definieren
-
+typedef struct
+{
+    int rows;
+    int cols;
+    float *buffer;
+} Matrix;
 
 Matrix createMatrix(unsigned int rows, unsigned int cols);
 void clearMatrix(Matrix *matrix);

neuralNetworkTests.c

@@ -5,10 +5,45 @@
 #include "unity.h"
 #include "neuralNetwork.h"
 
+#define FILE_HEADER_STRING "__info2_neural_network_file_format__" 
 
 static void prepareNeuralNetworkFile(const char *path, const NeuralNetwork nn)
 {
     // TODO
+    
+    FILE *f = fopen(path, "wb");
+    if (!f) return;
+
+    fwrite(FILE_HEADER_STRING, sizeof(char), strlen(FILE_HEADER_STRING), f);
+
+    int inputDim = nn.layers[0].weights.cols;
+    int outputDim = nn.layers[0].weights.rows;
+
+    fwrite(&inputDim, sizeof(int), 1, f);
+    fwrite(&outputDim, sizeof(int), 1, f);
+
+    for (int i = 0; i < nn.numberOfLayers; i++)
+    {
+        Matrix weights = nn.layers[i].weights;
+        Matrix biases  = nn.layers[i].biases;
+
+        int numWeightValues = weights.rows * weights.cols;
+        int numBiasValues   = biases.rows * biases.cols;
+
+        fwrite(weights.buffer, sizeof(MatrixType), numWeightValues, f);
+        fwrite(biases.buffer, sizeof(MatrixType), numBiasValues, f);
+
+        if (i < nn.numberOfLayers - 1)
+        {
+            int nextOutputDim = nn.layers[i + 1].weights.rows;
+            fwrite(&nextOutputDim, sizeof(int), 1, f);
+        }
+    }
+
+    int endMarker = 0;
+    fwrite(&endMarker, sizeof(int), 1, f);
+
+    fclose(f);
 }
 
 void test_loadModelReturnsCorrectNumberOfLayers(void)