oss_mixer_enuminfo
#define SNDCTL_DSP_GET_RECSRC_NAMES __SIOR ('P', 37, oss_mixer_enuminfo)
#define SNDCTL_DSP_GET_PLAYTGT_NAMES __SIOR ('P', 39, oss_mixer_enuminfo)
#define SNDCTL_MIX_ENUMINFO __SIOWR('X', 8, oss_mixer_enuminfo)
status_t OpenSoundDeviceMixer::GetEnumInfo(int index, oss_mixer_enuminfo *info)
status_t GetEnumInfo(int index, oss_mixer_enuminfo *info);
oss_mixer_enuminfo enuminfo;