oss_audioinfo
ret = dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg);
dsp_oss_audioinfo(struct cdev *i_dev, oss_audioinfo *ai)
bzero((void *)ai, sizeof(oss_audioinfo));
int dsp_oss_audioinfo(struct cdev *, oss_audioinfo *);
return (dsp_oss_audioinfo(i_dev, (oss_audioinfo *)arg));
#define SNDCTL_AUDIOINFO _IOWR('X', 7, oss_audioinfo)
#define SNDCTL_ENGINEINFO _IOWR('X',12, oss_audioinfo)
#define SNDCTL_AUDIOINFO_EX _IOWR('X',13, oss_audioinfo)