/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
 */

#ifndef _UAPI__SOUND_USB_STREAM_H
#define _UAPI__SOUND_USB_STREAM_H

#define USB_STREAM_INTERFACE_VERSION 2

#define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \
        _IOW('H', 0x90, struct usb_stream_config)

struct usb_stream_packet {
        unsigned offset;
        unsigned length;
};


struct usb_stream_config {
        unsigned version;
        unsigned sample_rate;
        unsigned period_frames;
        unsigned frame_size;
};

struct usb_stream {
        struct usb_stream_config cfg;
        unsigned read_size;
        unsigned write_size;

        int period_size;

        unsigned state;

        int idle_insize;
        int idle_outsize;
        int sync_packet;
        unsigned insize_done;
        unsigned periods_done;
        unsigned periods_polled;

        struct usb_stream_packet outpacket[2];
        unsigned                 inpackets;
        unsigned                 inpacket_head;
        unsigned                 inpacket_split;
        unsigned                 inpacket_split_at;
        unsigned                 next_inpacket_split;
        unsigned                 next_inpacket_split_at;
        struct usb_stream_packet inpacket[];
};

enum usb_stream_state {
        usb_stream_invalid,
        usb_stream_stopped,
        usb_stream_sync0,
        usb_stream_sync1,
        usb_stream_ready,
        usb_stream_running,
        usb_stream_xrun,
};

#endif /* _UAPI__SOUND_USB_STREAM_H */