I have a project that uses C++ classes and FFmpeg, I need to use fopen and write a file to the app sandbox, so the code that I need to write in C++ is the equivalent of:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docs_dir = [paths objectAtIndex:0];
This would me to my app sandbox, where I can pretty much manipulate my files The question is how do I go about writing this code in C++ so that I can use fopen on a file?
This is the method that needs implementation:
int testGrabAndWrite(const char* streamURL, bool decode, const char* filename)
{
FILE *outfile;
int ret;
int counter = 0;
uint8_t *data; // Pointer to the received audio mem
int size; // Size of the received audio buffer
outfile = fopen(filename, "w");
if (outfile == NULL)
exit(1);
// Open the RTP stream
if ((ret = openStream(streamURL, decode)) < 0)
return ret;
// Print out info about the stream found
int tmpSampleRate, tmpBitRate, tmpChannels;
ret = getStreamInfo(tmpSampleRate, tmpBitRate, tmpChannels);
printf("\nSample rate:%d Bit rateL%d Channels:%d\n",tmpSampleRate,tmpBitRate, tmpChannels);
// Grab some sample data and write it to file.
while (counter < 500)
{
ret = getStreamData(data, size);
fwrite(data, 1, size, outfile); // Write RTP packets, i.e. mp3, to file.
printf("Wrote packet %d with size %d which returned %d. ", ++counter, size, ret);
}
fclose(outfile);
closeStream();
return ret;
}
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docs_dir = [paths objectAtIndex:0];
NSString* aFile = [docs_dir stringByAppendingPathComponent: @"somedocthatdefinitelyexists.doc"];
FILE* fp = fopen([aFile fileSystemRepresentation], "r");
The message -fileSystemRepresentation
retruns a char* suitably encoded for the file system eg probably converted to UTF-8
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