44 lines
1 KiB
C
44 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __USB_STREAM_H
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#define __USB_STREAM_H
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#include <uapi/sound/usb_stream.h>
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#define USB_STREAM_NURBS 4
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#define USB_STREAM_URBDEPTH 4
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struct usb_stream_kernel {
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struct usb_stream *s;
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void *write_page;
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unsigned n_o_ps;
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struct urb *inurb[USB_STREAM_NURBS];
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struct urb *idle_inurb;
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struct urb *completed_inurb;
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struct urb *outurb[USB_STREAM_NURBS];
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struct urb *idle_outurb;
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struct urb *completed_outurb;
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struct urb *i_urb;
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int iso_frame_balance;
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wait_queue_head_t sleep;
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unsigned out_phase;
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unsigned out_phase_peeked;
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unsigned freqn;
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};
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struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
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struct usb_device *dev,
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unsigned in_endpoint, unsigned out_endpoint,
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unsigned sample_rate, unsigned use_packsize,
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unsigned period_frames, unsigned frame_size);
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void usb_stream_free(struct usb_stream_kernel *);
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int usb_stream_start(struct usb_stream_kernel *);
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void usb_stream_stop(struct usb_stream_kernel *);
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#endif /* __USB_STREAM_H */
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