113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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* Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define USB_STREAM_INTERFACE_VERSION 2
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#define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \
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_IOW('H', 0x90, struct usb_stream_config)
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struct usb_stream_packet {
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unsigned offset;
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unsigned length;
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};
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struct usb_stream_config {
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unsigned version;
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unsigned sample_rate;
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unsigned period_frames;
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unsigned frame_size;
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};
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struct usb_stream {
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struct usb_stream_config cfg;
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unsigned read_size;
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unsigned write_size;
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int period_size;
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unsigned state;
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int idle_insize;
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int idle_outsize;
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int sync_packet;
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unsigned insize_done;
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unsigned periods_done;
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unsigned periods_polled;
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struct usb_stream_packet outpacket[2];
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unsigned inpackets;
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unsigned inpacket_head;
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unsigned inpacket_split;
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unsigned inpacket_split_at;
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unsigned next_inpacket_split;
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unsigned next_inpacket_split_at;
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struct usb_stream_packet inpacket[0];
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};
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enum usb_stream_state {
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usb_stream_invalid,
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usb_stream_stopped,
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usb_stream_sync0,
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usb_stream_sync1,
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usb_stream_ready,
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usb_stream_running,
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usb_stream_xrun,
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};
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#if __KERNEL__
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#define USB_STREAM_NURBS 4
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#define USB_STREAM_URBDEPTH 4
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struct usb_stream_kernel {
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struct usb_stream *s;
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void *write_page;
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unsigned n_o_ps;
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struct urb *inurb[USB_STREAM_NURBS];
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struct urb *idle_inurb;
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struct urb *completed_inurb;
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struct urb *outurb[USB_STREAM_NURBS];
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struct urb *idle_outurb;
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struct urb *completed_outurb;
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struct urb *i_urb;
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int iso_frame_balance;
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wait_queue_head_t sleep;
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unsigned out_phase;
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unsigned out_phase_peeked;
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unsigned freqn;
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};
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struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
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struct usb_device *dev,
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unsigned in_endpoint, unsigned out_endpoint,
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unsigned sample_rate, unsigned use_packsize,
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unsigned period_frames, unsigned frame_size);
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void usb_stream_free(struct usb_stream_kernel *);
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int usb_stream_start(struct usb_stream_kernel *);
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void usb_stream_stop(struct usb_stream_kernel *);
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#endif
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