oss_count_t
sndctl_dsp_current_iptr(audio_client_t *c, oss_count_t *count)
sndctl_dsp_current_optr(audio_client_t *c, oss_count_t *count)
rv = sndctl_dsp_current_iptr(c, (oss_count_t *)data);
rv = sndctl_dsp_current_optr(c, (oss_count_t *)data);
#define SNDCTL_DSP_CURRENT_IPTR __OSSIOR('P', 35, oss_count_t)
#define SNDCTL_DSP_CURRENT_OPTR __OSSIOR('P', 36, oss_count_t)