LXR linux/drivers/media/usb/pvrusb2/pvrusb2-context.h

   1/*
   2 *
   3 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
   4 *
   5 *  This program is free software; you can redistribute it and/or modify
   6 *  it under the terms of the GNU General Public License as published by
   7 *  the Free Software Foundation; either version 2 of the License
   8 *
   9 *  This program is distributed in the hope that it will be useful,
  10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 *  GNU General Public License 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
  16 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 *
  18 */
  19#ifndef __PVRUSB2_CONTEXT_H
  20#define __PVRUSB2_CONTEXT_H
  21
  22#include <linux/mutex.h>
  23#include <linux/usb.h>
  24#include <linux/workqueue.h>
  25
  26struct pvr2_hdw;     /* hardware interface - defined elsewhere */
  27struct pvr2_stream;  /* stream interface - defined elsewhere */
  28
  29struct pvr2_context;        /* All central state */
  30struct pvr2_channel;        /* One I/O pathway to a user */
  31struct pvr2_context_stream; /* Wrapper for a stream */
  32struct pvr2_ioread;         /* Low level stream structure */
  33
  34struct pvr2_context_stream {
  35        struct pvr2_channel *user;
  36        struct pvr2_stream *stream;
  37};
  38
  39struct pvr2_context {
  40        struct pvr2_channel *mc_first;
  41        struct pvr2_channel *mc_last;
  42        struct pvr2_context *exist_next;
  43        struct pvr2_context *exist_prev;
  44        struct pvr2_context *notify_next;
  45        struct pvr2_context *notify_prev;
  46        struct pvr2_hdw *hdw;
  47        struct pvr2_context_stream video_stream;
  48        struct mutex mutex;
  49        int notify_flag;
  50        int initialized_flag;
  51        int disconnect_flag;
  52
  53        /* Called after pvr2_context initialization is complete */
  54        void (*setup_func)(struct pvr2_context *);
  55
  56};
  57
  58struct pvr2_channel {
  59        struct pvr2_context *mc_head;
  60        struct pvr2_channel *mc_next;
  61        struct pvr2_channel *mc_prev;
  62        struct pvr2_context_stream *stream;
  63        struct pvr2_hdw *hdw;
  64        unsigned int input_mask;
  65        void (*check_func)(struct pvr2_channel *);
  66};
  67
  68struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
  69                                         const struct usb_device_id *devid,
  70                                         void (*setup_func)(struct pvr2_context *));
  71void pvr2_context_disconnect(struct pvr2_context *);
  72
  73void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
  74void pvr2_channel_done(struct pvr2_channel *);
  75int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int);
  76unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *);
  77int pvr2_channel_claim_stream(struct pvr2_channel *,
  78                              struct pvr2_context_stream *);
  79struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
  80        struct pvr2_context_stream *);
  81
  82int pvr2_context_global_init(void);
  83void pvr2_context_global_done(void);
  84
  85#endif /* __PVRUSB2_CONTEXT_H */
  86/*
  87  Stuff for Emacs to see, in order to encourage consistent editing style:
  88  *** Local Variables: ***
  89  *** mode: c ***
  90  *** fill-column: 75 ***
  91  *** tab-width: 8 ***
  92  *** c-basic-offset: 8 ***
  93  *** End: ***
  94  */
  95