64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
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*/
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#ifndef _UAPI__SOUND_USB_STREAM_H
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#define _UAPI__SOUND_USB_STREAM_H
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#define USB_STREAM_INTERFACE_VERSION 2
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#define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \
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_IOW('H', 0x90, struct usb_stream_config)
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struct usb_stream_packet {
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unsigned offset;
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unsigned length;
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};
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struct usb_stream_config {
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unsigned version;
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unsigned sample_rate;
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unsigned period_frames;
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unsigned frame_size;
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};
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struct usb_stream {
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struct usb_stream_config cfg;
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unsigned read_size;
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unsigned write_size;
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int period_size;
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unsigned state;
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int idle_insize;
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int idle_outsize;
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int sync_packet;
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unsigned insize_done;
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unsigned periods_done;
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unsigned periods_polled;
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struct usb_stream_packet outpacket[2];
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unsigned inpackets;
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unsigned inpacket_head;
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unsigned inpacket_split;
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unsigned inpacket_split_at;
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unsigned next_inpacket_split;
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unsigned next_inpacket_split_at;
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struct usb_stream_packet inpacket[];
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};
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enum usb_stream_state {
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usb_stream_invalid,
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usb_stream_stopped,
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usb_stream_sync0,
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usb_stream_sync1,
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usb_stream_ready,
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usb_stream_running,
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usb_stream_xrun,
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};
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#endif /* _UAPI__SOUND_USB_STREAM_H */
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