oss_mixer_value
oss_mixer_value cval;
oss_mixer_value cval;
sndctl_mix_read(audio_client_t *c, oss_mixer_value *vr)
sndctl_mix_write(audio_client_t *c, oss_mixer_value *vr)
rv = sndctl_mix_read(c, (oss_mixer_value *)data);
rv = sndctl_mix_write(c, (oss_mixer_value *)data);
#define SNDCTL_MIX_READ __OSSIOWR('X', 5, oss_mixer_value)
#define SNDCTL_MIX_WRITE __OSSIOWR('X', 6, oss_mixer_value)