Segmentation Fault 11 in C
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19-10-2022 - |
Pregunta
I'm completely incompetent in C programming and I pieced this together by looking at different programs and working by analogy (i.e. I don't have much coding experience at all).
The program (for reading an aiff file (using libaiff library) and then making a copy of it) below works when executed. But I get errors if I make the following two "meaningless" changes (i.e. I simply define a pointer that I don't use):
After
char *filepathwrite = "Filepath/filename (Copy).aiff";
if I define
char *filepath = "LongFilepath";
I get segmentation fault 11. But if I define
char *filepath = "ShortFilepath";
or
int check = 1;
the program still works fine.
I can't tell what I'm doing wrong.
Thanks for any help you can extend. I'm working on Mac OS X Mavericks using the gcc compiler.
#define LIBAIFF_NOCOMPAT 1 // do not use LibAiff 2 API compatibility
#include <libaiff/libaiff.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
char *filepathread = "Filepath/filename.aiff";
char *filepathwrite = "Filepath/filename (Copy).aiff";
/* Initialize files for importing */
AIFF_Ref fileref1;
/* Intialize files for getting information about AIFF file */
uint64_t seconds, nSamples;
int channels;
double samplingRate;
int bitsPerSample;
int segmentSize;
int dummy;
int nsamplepts;
int32_t *samples, *samplesVec;
int count, maincount = 0, k, p;
/* Import Routine */
fileref1 = AIFF_OpenFile(filepathread, F_RDONLY) ;
if(fileref1)
{
printf("File opened successfully.\n");
dummy = AIFF_GetAudioFormat(fileref1,&nSamples,&channels,&samplingRate,&bitsPerSample,&segmentSize);
if (dummy < 1)
{
printf("Error getting audio format.\n");
AIFF_CloseFile(fileref1); return 0;
}
nsamplepts = ((int) nSamples)*channels;
samplesVec = malloc(nsamplepts * sizeof(int32_t));
for (count = 0; count < nsamplepts; count++)
{
dummy = AIFF_ReadSamples32Bit(fileref1, samples, channels);
if (dummy == 0) {
break;
}
p = 0;
for (k = channels*maincount; k < ((channels*maincount)+channels); k++) {
samplesVec[k] = *(samples+p);
p = p + 1;
}
maincount = maincount + 1;
}
printf("Number of maincounts (should equal sample frames): %d\n",maincount);
printf("Number of sample frames: %llu\n",nSamples);
printf("Number of sample points: %d\n",nsamplepts);
printf("Segment size: %d\n",segmentSize);
printf("Number of channels: %d\n",channels);
printf("Number of Sampling Rate: %f\n",samplingRate);
AIFF_CloseFile(fileref1);
}
seconds = nSamples/samplingRate;
/* Print out the seconds in H:MM:SS format */
printf("Length: %lu:%02lu:%02lu \n", (unsigned long) seconds/3600, (unsigned long) (seconds/60)%60, (unsigned long) seconds%60);
/* Export Routine */
fileref1 = AIFF_OpenFile(filepathwrite, F_WRONLY);
if(fileref1)
{
dummy = AIFF_SetAudioFormat(fileref1, channels, samplingRate, bitsPerSample);
dummy = AIFF_StartWritingSamples(fileref1);
dummy = AIFF_WriteSamples32Bit(fileref1, samplesVec, nsamplepts);
dummy = AIFF_EndWritingSamples(fileref1);
AIFF_CloseFile(fileref1);
}
free(samplesVec);
return 0;
}
No hay solución correcta
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