drivers/media/usb/pvrusb2/pvrusb2-std.h

   1 /*
   2  *
   3  *
   4  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  */
  16 #ifndef __PVRUSB2_STD_H
  17 #define __PVRUSB2_STD_H
  18
  19 #include <linux/videodev2.h>
  20
  21 // Convert string describing one or more video standards into a mask of V4L
  22 // standard bits.  Return true if conversion succeeds otherwise return
  23 // false.  String is expected to be of the form: C1-x/y;C2-a/b where C1 and
  24 // C2 are color system names (e.g. "PAL", "NTSC") and x, y, a, and b are
  25 // modulation schemes (e.g. "M", "B", "G", etc).
  26 int pvr2_std_str_to_id(v4l2_std_id *idPtr,const char *bufPtr,
  27                        unsigned int bufSize);
  28
  29 // Convert any arbitrary set of video standard bits into an unambiguous
  30 // readable string.  Return value is the number of bytes consumed in the
  31 // buffer.  The formatted string is of a form that can be parsed by our
  32 // sibling std_std_to_id() function.
  33 unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize,
  34                                 v4l2_std_id id);
  35
  36 // Create an array of suitable v4l2_standard structures given a bit mask of
  37 // video standards to support.  The array is allocated from the heap, and
  38 // the number of elements is returned in the first argument.
  39 struct v4l2_standard *pvr2_std_create_enum(unsigned int *countptr,
  40                                            v4l2_std_id id);
  41
  42 // Return mask of which video standard bits are valid
  43 v4l2_std_id pvr2_std_get_usable(void);
  44
  45 #endif /* __PVRUSB2_STD_H */