oss_audioinfo
oss_audioinfo ainfo;
oss_audioinfo ainfo;
oss_audioinfo *si = a;
sndctl_audioinfo(audio_client_t *c, oss_audioinfo *si)
rv = sndctl_audioinfo(c, (oss_audioinfo *)data);
rv = sndctl_audioinfo(c, (oss_audioinfo *)data);
#define SNDCTL_AUDIOINFO __OSSIOWR('X', 7, oss_audioinfo)
#define SNDCTL_ENGINEINFO __OSSIOWR('X', 12, oss_audioinfo)
#define SNDCTL_AUDIOINFO_EX __OSSIOWR('X', 13, oss_audioinfo)