GNU Linux-libre 6.9.1-gnu
[releases.git] / 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 int 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 int out_phase;
30         unsigned int out_phase_peeked;
31         unsigned int freqn;
32 };
33
34 struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
35                                   struct usb_device *dev,
36                                   unsigned int in_endpoint,
37                                   unsigned int out_endpoint,
38                                   unsigned int sample_rate,
39                                   unsigned int use_packsize,
40                                   unsigned int period_frames,
41                                   unsigned int frame_size);
42 void usb_stream_free(struct usb_stream_kernel *sk);
43 int usb_stream_start(struct usb_stream_kernel *sk);
44 void usb_stream_stop(struct usb_stream_kernel *sk);
45
46 #endif /* __USB_STREAM_H */