audio_buf
struct audio_buf play, rec;
void audio_buf_wakeup(struct audio_buf *);
audio_buf_wakeup(struct audio_buf *buf)
audio_buf_init(struct audio_softc *sc, struct audio_buf *buf, int dir)
audio_buf_done(struct audio_softc *sc, struct audio_buf *buf)
audio_buf_rgetblk(struct audio_buf *buf, size_t *rsize)
audio_buf_rdiscard(struct audio_buf *buf, size_t count)
audio_buf_wcommit(struct audio_buf *buf, size_t count)
audio_buf_wgetblk(struct audio_buf *buf, size_t *rsize)