Add build system scaffolding and libc headers

1 files changed, 62 insertions, 0 deletions

diff --git a/include/arch/x86_64/sound/usb_stream.h b/include/arch/x86_64/sound/usb_stream.h
new file mode 100644
index 00000000..6a6c3ca6
--- /dev/null
+++ b/include/arch/x86_64/sound/usb_stream.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
+ */
+
+#ifndef __SOUND_USB_STREAM_H
+#define __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 /* __SOUND_USB_STREAM_H */