forked from freudenreichan/info2Praktikum-NeuronalesNetz
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "imageInput.h"
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#define BUFFER_SIZE 100
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#define FILE_HEADER_STRING "__info2_image_file_format__"
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#define FILE_HEADER_SIZE (sizeof(FILE_HEADER_STRING)-1)
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// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
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FILE *checkFile(const char *path)
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{
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FILE *datei = fopen(path,"rb");
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if (datei == NULL)
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{
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perror("Datei konnte nicht geoeffnet werden");
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return NULL;
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}
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char buffer[FILE_HEADER_SIZE+1];
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if (fread(buffer,1,FILE_HEADER_SIZE,datei)!=FILE_HEADER_SIZE)
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{
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perror("Header konnte nicht eingelessen werden");
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fclose(datei);
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return NULL;
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}
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buffer[FILE_HEADER_SIZE] = '\0';
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if (strcmp(buffer,FILE_HEADER_STRING)!=0)
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{
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printf("Falscher Dateikopf");
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//printf("\n%s",buffer);
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//printf("\n%s",FILE_HEADER_STRING);
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//printf("\n%d",strcmp(buffer,FILE_HEADER_STRING));
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fclose(datei);
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return NULL;
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}
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return datei;
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}
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// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
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GrayScaleImageSeries *readImages(const char *path)
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{
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FILE *datei = checkFile(path);
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if (datei==NULL)
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{
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return NULL;
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}
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unsigned short image_count, width, height;
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fread(&image_count,1,sizeof(unsigned short),datei);
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fread(&width,1,sizeof(unsigned short),datei);
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fread(&height,1,sizeof(unsigned short),datei);
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//printf("%u Bilder und %u mal %u",image_count,width,height);
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GrayScaleImageSeries *series = NULL;
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series = malloc(sizeof(GrayScaleImageSeries));
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series->count = image_count;
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series->images = malloc(image_count*sizeof(GrayScaleImage));
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series->labels = malloc(image_count*sizeof(unsigned char));
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for(unsigned short i = 0;i<image_count;i++)
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{
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series->images[i].buffer = malloc(width*height);
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}
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for(unsigned short i = 0;i<image_count;i++)
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{
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for (unsigned int j=0;j<(width*height);j++)
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{
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fread(&series->images[i].buffer[j],1,1,datei);
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}
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fread(&series->labels[i],1,1,datei);
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//printf("%d\n",series->labels[i]);
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}
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fclose(datei);
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return series;
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}
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// TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
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void clearSeries(GrayScaleImageSeries *series)
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{
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if(series == NULL)
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{
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printf("Serie nicht vorhanden\n");
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return;
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}
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unsigned short anzahl = series->count;
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for(unsigned short i = 0;i<anzahl;i++)
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{
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free(series->images[i].buffer );
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}
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free(series->images);
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free(series->labels);
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free(series);
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printf("Serie freigegeben\n");
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return;
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} |