audio_hw_set_format
error = audio_hw_set_format(sc, mode, &phwfmt, &rhwfmt, &pfil, &rfil);
static int audio_hw_set_format(struct audio_softc *, int,
error = audio_hw_set_format(sc, mode, &phwfmt, &rhwfmt, &pfil, &rfil);
error = audio_hw_set_format(sc, mode, &phwfmt, &rhwfmt, &pfil, &rfil);