drivers/media/video/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
  26 struct pvr2_hdw;     /* hardware interface - defined elsewhere */
  27 struct pvr2_stream;  /* stream interface - defined elsewhere */
  28
  29 struct pvr2_context;        /* All central state */
  30 struct pvr2_channel;        /* One I/O pathway to a user */
  31 struct pvr2_context_stream; /* Wrapper for a stream */
  32 struct pvr2_ioread;         /* Low level stream structure */
  33
  34 struct pvr2_context_stream {
  35         struct pvr2_channel *user;
  36         struct pvr2_stream *stream;
  37 };
  38
  39 struct 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
  58 struct 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
  68 struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
  69                                          const struct usb_device_id *devid,
  70                                          void (*setup_func)(struct pvr2_context *));
  71 void pvr2_context_disconnect(struct pvr2_context *);
  72
  73 void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *);
  74 void pvr2_channel_done(struct pvr2_channel *);
  75 int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int);
  76 unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *);
  77 int pvr2_channel_claim_stream(struct pvr2_channel *,
  78                               struct pvr2_context_stream *);
  79 struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
  80         struct pvr2_context_stream *);
  81
  82 int pvr2_context_global_init(void);
  83 void 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   */