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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | /* * 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. */ #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, }; #if __KERNEL__ #define USB_STREAM_NURBS 4 #define USB_STREAM_URBDEPTH 4 struct usb_stream_kernel { struct usb_stream *s; void *write_page; unsigned n_o_ps; struct urb *inurb[USB_STREAM_NURBS]; struct urb *idle_inurb; struct urb *completed_inurb; struct urb *outurb[USB_STREAM_NURBS]; struct urb *idle_outurb; struct urb *completed_outurb; struct urb *i_urb; int iso_frame_balance; wait_queue_head_t sleep; unsigned out_phase; unsigned out_phase_peeked; unsigned freqn; }; struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk, struct usb_device *dev, unsigned in_endpoint, unsigned out_endpoint, unsigned sample_rate, unsigned use_packsize, unsigned period_frames, unsigned frame_size); void usb_stream_free(struct usb_stream_kernel *); int usb_stream_start(struct usb_stream_kernel *); void usb_stream_stop(struct usb_stream_kernel *); #endif |