2 * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #define USB_STREAM_INTERFACE_VERSION 2
21 #define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \
22 _IOW('H', 0x90, struct usb_stream_config)
24 struct usb_stream_packet {
30 struct usb_stream_config {
33 unsigned period_frames;
38 struct usb_stream_config cfg;
50 unsigned periods_done;
51 unsigned periods_polled;
53 struct usb_stream_packet outpacket[2];
55 unsigned inpacket_head;
56 unsigned inpacket_split;
57 unsigned inpacket_split_at;
58 unsigned next_inpacket_split;
59 unsigned next_inpacket_split_at;
60 struct usb_stream_packet inpacket[0];
63 enum usb_stream_state {
75 #define USB_STREAM_NURBS 4
76 #define USB_STREAM_URBDEPTH 4
78 struct usb_stream_kernel {
85 struct urb *inurb[USB_STREAM_NURBS];
86 struct urb *idle_inurb;
87 struct urb *completed_inurb;
88 struct urb *outurb[USB_STREAM_NURBS];
89 struct urb *idle_outurb;
90 struct urb *completed_outurb;
93 int iso_frame_balance;
95 wait_queue_head_t sleep;
98 unsigned out_phase_peeked;
102 struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
103 struct usb_device *dev,
104 unsigned in_endpoint, unsigned out_endpoint,
105 unsigned sample_rate, unsigned use_packsize,
106 unsigned period_frames, unsigned frame_size);
107 void usb_stream_free(struct usb_stream_kernel *);
108 int usb_stream_start(struct usb_stream_kernel *);
109 void usb_stream_stop(struct usb_stream_kernel *);