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         struct usb_device *dev;
  13
  14         void *write_page;
  15
  16         unsigned int n_o_ps;
  17
  18         struct urb *inurb[USB_STREAM_NURBS];
  19         struct urb *idle_inurb;
  20         struct urb *completed_inurb;
  21         struct urb *outurb[USB_STREAM_NURBS];
  22         struct urb *idle_outurb;
  23         struct urb *completed_outurb;
  24         struct urb *i_urb;
  25
  26         int iso_frame_balance;
  27
  28         wait_queue_head_t sleep;
  29
  30         unsigned int out_phase;
  31         unsigned int out_phase_peeked;
  32         unsigned int freqn;
  33 };
  34
  35 struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
  36                                   struct usb_device *dev,
  37                                   unsigned int in_endpoint,
  38                                   unsigned int out_endpoint,
  39                                   unsigned int sample_rate,
  40                                   unsigned int use_packsize,
  41                                   unsigned int period_frames,
  42                                   unsigned int frame_size);
  43 void usb_stream_free(struct usb_stream_kernel *sk);
  44 int usb_stream_start(struct usb_stream_kernel *sk);
  45 void usb_stream_stop(struct usb_stream_kernel *sk);
  46
  47 #endif /* __USB_STREAM_H */