UAUDIO_SPF_DIV
s->spf = (uint64_t)sc->rate * UAUDIO_SPF_DIV / a->fps;
spf_max = (a->maxpkt / bpa) * UAUDIO_SPF_DIV;
UAUDIO_SPF_DIV / s->spf_min + 1;
((s->spf_max + UAUDIO_SPF_DIV - 1) / UAUDIO_SPF_DIV);
sc->diff_nframes / UAUDIO_SPF_DIV;
-sc->diff_nframes / UAUDIO_SPF_DIV;
s->spf = (uint64_t)(sc->rate - diff) * UAUDIO_SPF_DIV / sc->ufps;
fsize = s->spf_remain / UAUDIO_SPF_DIV * bpf;
s->spf_remain %= UAUDIO_SPF_DIV;
val *= UAUDIO_SPF_DIV / (1 << 16);
fsize = s->spf_remain / UAUDIO_SPF_DIV * bpf;
s->spf_remain %= UAUDIO_SPF_DIV;
fsize_min = s->spf_min / UAUDIO_SPF_DIV;
fsize = s->spf_remain / UAUDIO_SPF_DIV * bpf;
s->spf_remain %= UAUDIO_SPF_DIV;