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continued debugging 'readStatusInfo()' in 'imageInput.c' not yet working correctly, see comment

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Jonas Hofmann 2025-11-18 00:22:57 +01:00
parent a2c2aae0fb
commit f403d4ffa8
1 changed files with 29 additions and 18 deletions
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43
imageInput.c
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@ -10,8 +10,9 @@
// übersichtlich aufgeteilt werden! // übersichtlich aufgeteilt werden!
// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei // TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
int readStatusInfo(FILE **source, char *const headerString, unsigned int *const imageCount, unsigned int *const imageWidth, unsigned int *const imageHeight, int const amountToRead); //void setupMemory();
void readImagedata(FILE **source, unsigned char *const imageBuffer, unsigned char *const labelBuffer,int const imageCount ,int const amountToRead); unsigned int readStatusInfo(FILE *source, char *const headerString, unsigned int *const imageCount, unsigned int *const imageWidth, unsigned int *const imageHeight, int const amountToRead);
void readImagedata(FILE *source, unsigned char *const imageBuffer, unsigned char *const labelBuffer,int const imageCount ,int const amountToRead);
// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen // TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
@ -23,20 +24,24 @@ GrayScaleImageSeries *readImages(const char *path)
FILE *readSource; FILE *readSource;
unsigned int numberOfBytesToRead = 0; unsigned int numberOfBytesToRead = 0;
const unsigned int amountOfStatusInfoToRead = 1; const unsigned int amountOfStatusInfoToRead = 1;
char headerString[sizeof("__info2_image_file_format__")]; char headerString[sizeof("__info2_image_file_format__")] = "__info2_image_file_format__";
//speicher allocaten weil *series auf null zeigt !!!!!!!!
readSource = fopen(path, "rb"); readSource = fopen(path, "rb");
if (readSource != NULL) if (readSource != NULL)
{ {
printf("hier\n");
numberOfBytesToRead = readStatusInfo(&readSource, headerString, &series->count, &series->images->width, &series->images->height, amountOfStatusInfoToRead); series = calloc(sizeof(GrayScaleImageSeries), amountOfStatusInfoToRead);
series->images = calloc(sizeof(GrayScaleImage), amountOfStatusInfoToRead);
numberOfBytesToRead = readStatusInfo(readSource, headerString, &(series->count), &(series->images->width), &(series->images->height), amountOfStatusInfoToRead);
series->images->buffer = calloc((series->count) * numberOfBytesToRead, sizeof(GrayScalePixelType)); series->images->buffer = calloc((series->count) * numberOfBytesToRead, sizeof(GrayScalePixelType));
series->labels = calloc((series->count), sizeof(&(series->labels))); series->labels = calloc((series->count), sizeof(&(series->labels)));
readImagedata(&readSource, series->images->buffer, series->labels, series->count, numberOfBytesToRead); readImagedata(readSource, series->images->buffer, series->labels, series->count, numberOfBytesToRead);
} }
fclose(readSource); fclose(readSource);
@ -79,29 +84,35 @@ void clearSeries(GrayScaleImageSeries *series)
// reads string, pictureCount, pictureWidth, pictureHight // reads string, pictureCount, pictureWidth, pictureHight
int readStatusInfo(FILE **source, char *const headerString, unsigned int *const imageCount, unsigned int *const imageWidth, unsigned int *const imageHeight, int const amountToRead) unsigned int readStatusInfo(FILE *source, char *const headerString, unsigned int *const imageCount, unsigned int *const imageWidth, unsigned int *const imageHeight, int const amountToRead)
{ {
int bytesToRead = 0; unsigned int bytesToRead = 0;
fread(headerString, sizeof(*headerString), amountToRead, *source); fread(headerString, sizeof(*headerString), amountToRead, source);
fread(imageCount, sizeof(*imageCount), amountToRead, *source); fread(imageCount, sizeof(*imageCount), amountToRead, source);
fread(imageWidth, sizeof(*imageWidth), amountToRead, *source); fread(imageWidth, sizeof(*imageWidth), amountToRead, source);
fread(imageHeight, sizeof(*imageHeight), amountToRead, *source); fread(imageHeight, sizeof(*imageHeight), amountToRead, source);
bytesToRead = (*imageWidth) * (*imageHeight); bytesToRead = (*imageWidth) * (*imageHeight);
// state of debugging:
// stopped here,
// read width and height
// return nonsensical numbers
// is the sizeof() command correct??
printf("hier\n");
printf("bytes to read = %u", bytesToRead);
return bytesToRead; return bytesToRead;
} }
// reads the imagebytes and the label of all images // reads the imagebytes and the label of all images
void readImagedata(FILE **source, unsigned char *const imageBuffer, unsigned char *const labelBuffer,int const imageCount , int const amountOfBytes) void readImagedata(FILE *source, unsigned char *const imageBuffer, unsigned char *const labelBuffer,int const imageCount , int const amountOfBytes)
{ {
int i = 0; int i = 0;
for (i = 0; i <= imageCount; i++) for (i = 0; i <= imageCount; i++)
{ {
fread((imageBuffer + i * amountOfBytes), sizeof(&(imageBuffer)), amountOfBytes, *source); fread((imageBuffer + i * amountOfBytes), sizeof(&(imageBuffer)), amountOfBytes, source);
fread((labelBuffer + i), sizeof(&(labelBuffer)), 1, *source); fread((labelBuffer + i), sizeof(&(labelBuffer)), 1, source);
} }
} }