oss_mixext
#define SNDCTL_MIX_EXTINFO __SIOWR('X', 4, oss_mixext)
status_t OpenSoundDeviceMixer::GetExtInfo(int index, oss_mixext *info)
status_t GetExtInfo(int index, oss_mixext *info);
oss_mixext mixext;
oss_mixext mixext;
oss_mixext mixext;
oss_mixext mixext;
oss_mixext mixext;
oss_mixext mixext;