sound/usb/usx2y/usb_stream.h

   1 #ifndef __USB_STREAM_H
   2 #define __USB_STREAM_H
   3
   4 #include <uapi/sound/usb_stream.h>
   5
   6 #define USB_STREAM_NURBS 4
   7 #define USB_STREAM_URBDEPTH 4
   8
   9 struct usb_stream_kernel {
  10         struct usb_stream *s;
  11
  12         void *write_page;
  13
  14         unsigned n_o_ps;
  15
  16         struct urb *inurb[USB_STREAM_NURBS];
  17         struct urb *idle_inurb;
  18         struct urb *completed_inurb;
  19         struct urb *outurb[USB_STREAM_NURBS];
  20         struct urb *idle_outurb;
  21         struct urb *completed_outurb;
  22         struct urb *i_urb;
  23
  24         int iso_frame_balance;
  25
  26         wait_queue_head_t sleep;
  27
  28         unsigned out_phase;
  29         unsigned out_phase_peeked;
  30         unsigned freqn;
  31 };
  32
  33 struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
  34                                   struct usb_device *dev,
  35                                   unsigned in_endpoint, unsigned out_endpoint,
  36                                   unsigned sample_rate, unsigned use_packsize,
  37                                   unsigned period_frames, unsigned frame_size);
  38 void usb_stream_free(struct usb_stream_kernel *);
  39 int usb_stream_start(struct usb_stream_kernel *);
  40 void usb_stream_stop(struct usb_stream_kernel *);
  41
  42 #endif /* __USB_STREAM_H */