62f5fdace7
Trying to temporarily check that the stream is not claimed during open of the radio device is at best a race condition. What's to stop another app from claiming the stream anyway the instant after the check is done? The implementation for this was dicey anyway. So it's removed. The only "price" for this is that if /dev/radioX is opened while streaming video, then the video stream is just going to switch to radio mode anyway. If a user does this, he gets what he expects... Signed-off-by: Mike Isely <isely@pobox.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
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* $Id$
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*
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* Copyright (C) 2005 Mike Isely <isely@pobox.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License 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
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __PVRUSB2_BASE_H
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#define __PVRUSB2_BASE_H
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#include <linux/mutex.h>
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#include <linux/usb.h>
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#include <linux/workqueue.h>
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struct pvr2_hdw; /* hardware interface - defined elsewhere */
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struct pvr2_stream; /* stream interface - defined elsewhere */
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struct pvr2_context; /* All central state */
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struct pvr2_channel; /* One I/O pathway to a user */
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struct pvr2_context_stream; /* Wrapper for a stream */
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struct pvr2_crit_reg; /* Critical region pointer */
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struct pvr2_ioread; /* Low level stream structure */
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struct pvr2_context_stream {
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struct pvr2_channel *user;
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struct pvr2_stream *stream;
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};
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struct pvr2_context {
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struct pvr2_channel *mc_first;
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struct pvr2_channel *mc_last;
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struct pvr2_hdw *hdw;
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struct pvr2_context_stream video_stream;
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struct mutex mutex;
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int disconnect_flag;
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/* Called after pvr2_context initialization is complete */
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void (*setup_func)(struct pvr2_context *);
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/* Work queue overhead for out-of-line processing */
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struct workqueue_struct *workqueue;
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struct work_struct workinit;
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struct work_struct workpoll;
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};
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struct pvr2_channel {
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struct pvr2_context *mc_head;
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struct pvr2_channel *mc_next;
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struct pvr2_channel *mc_prev;
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struct pvr2_context_stream *stream;
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struct pvr2_hdw *hdw;
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void (*check_func)(struct pvr2_channel *);
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};
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void pvr2_context_enter(struct pvr2_context *);
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void pvr2_context_exit(struct pvr2_context *);
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struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
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const struct usb_device_id *devid,
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void (*setup_func)(struct pvr2_context *));
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void pvr2_context_disconnect(struct pvr2_context *);
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void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
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void pvr2_channel_done(struct pvr2_channel *);
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int pvr2_channel_claim_stream(struct pvr2_channel *,
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struct pvr2_context_stream *);
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struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
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struct pvr2_context_stream *);
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#endif /* __PVRUSB2_CONTEXT_H */
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/*
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Stuff for Emacs to see, in order to encourage consistent editing style:
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*** Local Variables: ***
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*** mode: c ***
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*** fill-column: 75 ***
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*** tab-width: 8 ***
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*** c-basic-offset: 8 ***
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*** End: ***
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*/
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