not by just using createSound, if internally it is in a loop inside a codec trying to decompress the whole thing.

Another option is to decompress the data yourself, using FMOD_OPENONLY flag, so that no decompression happens, then you use Sound::readData and Sound::lock/unlock to decode the data in small blocks (with your own cancel check) until the whole sample is read. This would work the way you wanted.

Thanks for the answer, brett!

So I would do something like this:

[code:2jlms0mk]
do {

if (abort) {
    return;
}

result = sound->lock(offset, chunksize, &ptr1, &ptr2, &len1, &len2);
offset += len1;
result = sound->readData((char *)ptr1, chunksize, &read);
bytesread += read;
result = sound->unlock(ptr1, ptr2, len1, len2);

} while (result == FMOD_OK && read == chunksize);

[/code:2jlms0mk]

Yes that looks about right.

I don’t know if this is the best solution, but it seems to work, you can even set the position of the sound to an unloaded part and it will start playing from that position when it finished loading.

If somebody is interested here’ the code:

[code:2upzfcwi]
FMOD_RESULT result;
FMOD::Sound *sound;
unsigned int offset = 0;
unsigned int chunksize = 4096;
void *ptr1;
void *ptr2;
unsigned int len1 = 0;
unsigned int len2 = 0;
unsigned int read = 0;
unsigned int bytesread = 0;

result = system->createSound(filename, FMOD_OPENONLY | FMOD_ACCURATETIME, 0, &sound);
ERRCHECK(result);

do {

if (abort) {
    return;
}

result = sound->lock(offset, chunksize, &ptr1, &ptr2, &len1, &len2);
ERRCHECK(result);
offset += len1;

result = sound->readData((char *)ptr1, chunksize, &read);
ERRCHECK(result);
bytesread += read;

result = sound->unlock(ptr1, ptr2, len1, len2);
ERRCHECK(result);

} while (result == FMOD_OK && read == chunksize);

[/code:2upzfcwi]