au_chinfo
au_prepareoutput(struct au_chinfo *ch, u_int32_t format)
struct au_chinfo *ch = (dir == PCMDIR_PLAY)? &au->pch : NULL;
struct au_chinfo *ch = data;
struct au_chinfo *ch = data;
struct au_chinfo *ch = data;
struct au_chinfo *ch = data;
struct au_chinfo *ch = data;
struct au_chinfo pch;