celt_rng          309 libavcodec/opus_celt.c                     xptr[(j << f->size) + k] = (celt_rng(f) & 0x8000) ? r : -r;
celt_rng          816 libavcodec/opus_pvq.c                         X[i] = (((int32_t)celt_rng(f)) >> 20);
celt_rng          822 libavcodec/opus_pvq.c                         X[i] = lowband[i] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);