sound/usb/usx2y/usb_stream.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __USB_STREAM_H
   3 #define __USB_STREAM_H
   4
   5 #include <uapi/sound/usb_stream.h>
   6
   7 #define USB_STREAM_NURBS 4
   8 #define USB_STREAM_URBDEPTH 4
   9
  10 struct usb_stream_kernel {
  11         struct usb_stream *s;
  12
  13         void *write_page;
  14
  15         unsigned n_o_ps;
  16
  17         struct urb *inurb[USB_STREAM_NURBS];
  18         struct urb *idle_inurb;
  19         struct urb *completed_inurb;
  20         struct urb *outurb[USB_STREAM_NURBS];
  21         struct urb *idle_outurb;
  22         struct urb *completed_outurb;
  23         struct urb *i_urb;
  24
  25         int iso_frame_balance;
  26
  27         wait_queue_head_t sleep;
  28
  29         unsigned out_phase;
  30         unsigned out_phase_peeked;
  31         unsigned freqn;
  32 };
  33
  34 struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
  35                                   struct usb_device *dev,
  36                                   unsigned in_endpoint, unsigned out_endpoint,
  37                                   unsigned sample_rate, unsigned use_packsize,
  38                                   unsigned period_frames, unsigned frame_size);
  39 void usb_stream_free(struct usb_stream_kernel *);
  40 int usb_stream_start(struct usb_stream_kernel *);
  41 void usb_stream_stop(struct usb_stream_kernel *);
  42
  43 #endif /* __USB_STREAM_H */