usb_ac_send_as_cmd
static int usb_ac_send_as_cmd(usb_ac_state_t *, usb_audio_eng_t *,
if (usb_ac_send_as_cmd(uacp, engine, USB_AUDIO_SETUP, 0) !=
if (usb_ac_send_as_cmd(uacp, engine, USB_AUDIO_TEARDOWN,
if (usb_ac_send_as_cmd(uacp, engine,
if (usb_ac_send_as_cmd(uacp, engine, USB_AUDIO_SET_SAMPLE_FREQ,
if (usb_ac_send_as_cmd(uacp, engine, USB_AUDIO_START_PLAY,
if (usb_ac_send_as_cmd(uacp, engine, USB_AUDIO_PAUSE_PLAY,
if (usb_ac_send_as_cmd(uacp, engine, USB_AUDIO_START_RECORD,
if (usb_ac_send_as_cmd(uacp, engine, USB_AUDIO_STOP_RECORD,