48 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __USB_STREAM_H3#define __USB_STREAM_H4 5#include <uapi/sound/usb_stream.h>6 7#define USB_STREAM_NURBS 48#define USB_STREAM_URBDEPTH 49 10struct 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 35struct 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);43void usb_stream_free(struct usb_stream_kernel *sk);44int usb_stream_start(struct usb_stream_kernel *sk);45void usb_stream_stop(struct usb_stream_kernel *sk);46 47#endif /* __USB_STREAM_H */48