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5da7f924 TI |
1 | /* |
2 | * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de> | |
3 | * | |
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. | |
8 | * | |
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 | |
12 | * for more details. | |
13 | * | |
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. | |
17 | */ | |
18 | ||
19 | #ifndef _UAPI__SOUND_USB_STREAM_H | |
20 | #define _UAPI__SOUND_USB_STREAM_H | |
21 | ||
22 | #define USB_STREAM_INTERFACE_VERSION 2 | |
23 | ||
24 | #define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \ | |
25 | _IOW('H', 0x90, struct usb_stream_config) | |
26 | ||
27 | struct usb_stream_packet { | |
28 | unsigned offset; | |
29 | unsigned length; | |
30 | }; | |
31 | ||
32 | ||
33 | struct usb_stream_config { | |
34 | unsigned version; | |
35 | unsigned sample_rate; | |
36 | unsigned period_frames; | |
37 | unsigned frame_size; | |
38 | }; | |
39 | ||
40 | struct usb_stream { | |
41 | struct usb_stream_config cfg; | |
42 | unsigned read_size; | |
43 | unsigned write_size; | |
44 | ||
45 | int period_size; | |
46 | ||
47 | unsigned state; | |
48 | ||
49 | int idle_insize; | |
50 | int idle_outsize; | |
51 | int sync_packet; | |
52 | unsigned insize_done; | |
53 | unsigned periods_done; | |
54 | unsigned periods_polled; | |
55 | ||
56 | struct usb_stream_packet outpacket[2]; | |
57 | unsigned inpackets; | |
58 | unsigned inpacket_head; | |
59 | unsigned inpacket_split; | |
60 | unsigned inpacket_split_at; | |
61 | unsigned next_inpacket_split; | |
62 | unsigned next_inpacket_split_at; | |
63 | struct usb_stream_packet inpacket[0]; | |
64 | }; | |
65 | ||
66 | enum usb_stream_state { | |
67 | usb_stream_invalid, | |
68 | usb_stream_stopped, | |
69 | usb_stream_sync0, | |
70 | usb_stream_sync1, | |
71 | usb_stream_ready, | |
72 | usb_stream_running, | |
73 | usb_stream_xrun, | |
74 | }; | |
75 | ||
76 | #endif /* _UAPI__SOUND_USB_STREAM_H */ |