int try_seeking(stb_vorbis *v, unsigned int pos, short *output, unsigned int num_samples)
{
int count;
short samples[SAMPLES_TO_TEST*2];
assert(pos <= num_samples);
if (!stb_vorbis_seek(v, pos)) {
fprintf(stderr, "Seek to %u returned error from stb_vorbis\n", pos);
return 0;
}
count = stb_vorbis_get_samples_short_interleaved(v, 2, samples, SAMPLES_TO_TEST*2);
if (count > (int) (num_samples - pos)) {
fprintf(stderr, "Seek to %u allowed decoding %d samples when only %d should have been valid.\n",
pos, count, (int) (num_samples - pos));
return 0;
}
if (count < SAMPLES_TO_TEST && count < (int) (num_samples - pos)) {
fprintf(stderr, "Seek to %u only decoded %d samples of %d attempted when at least %d should have been valid.\n",
pos, count, SAMPLES_TO_TEST, num_samples - pos);
return 0;
}
if (0 != memcmp(samples, output + pos*2, count*2)) {
int k;
for (k=0; k < SAMPLES_TO_TEST*2; ++k) {
if (samples[k] != output[k]) {
fprintf(stderr, "Seek to %u produced incorrect samples starting at sample %u (short #%d in buffer).\n",
pos, pos + (k/2), k);
break;
}
}
assert(k != SAMPLES_TO_TEST*2);
return 0;
}
return 1;
}
void cSoundFileOgg::Seek( cTime timeOffset ) {
if ( NULL != mStream ) {
Uint32 frameOffset = static_cast<Uint32>( timeOffset.AsSeconds() * mSampleRate / 1000 );
stb_vorbis_seek( mStream, frameOffset );
}
}