#ifndef __USBAUDIO_ENDPOINT_H
  #define __USBAUDIO_ENDPOINT_H

  #define SND_USB_ENDPOINT_TYPE_DATA     0
  #define SND_USB_ENDPOINT_TYPE_SYNC     1
  
  struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
  					      struct usb_host_interface *alts,
  					      int ep_num, int direction, int type);
  
  int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,

  				snd_pcm_format_t pcm_format,
  				unsigned int channels,
  				unsigned int period_bytes,
  				unsigned int rate,

  				struct audioformat *fmt,
  				struct snd_usb_endpoint *sync_ep);

  int  snd_usb_endpoint_start(struct snd_usb_endpoint *ep, bool can_sleep);

  void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep);

  void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);

  int  snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
  int  snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep);
  void snd_usb_endpoint_free(struct list_head *head);

  int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);

  int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep);

  
  void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
  			     struct snd_usb_endpoint *sender,
  			     const struct urb *urb);

  #endif /* __USBAUDIO_ENDPOINT_H */