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Diffstat (limited to '')
| -rw-r--r-- | include/uapi/sound/usb_stream.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/include/uapi/sound/usb_stream.h b/include/uapi/sound/usb_stream.h new file mode 100644 index 000000000..506090161 --- /dev/null +++ b/include/uapi/sound/usb_stream.h @@ -0,0 +1,63 @@ +/* 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 */ |