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 */ 77