/*
* 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
