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-rw-r--r--include/uapi/sound/usb_stream.h77
1 files changed, 77 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..95419d8bb
--- /dev/null
+++ b/include/uapi/sound/usb_stream.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#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[0];
+};
+
+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 */