usb/pvrusb2/pvrusb2-std.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  *
0004  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
0005  */
0006 #ifndef __PVRUSB2_STD_H
0007 #define __PVRUSB2_STD_H
0008
0009 #include <linux/videodev2.h>
0010
0011 // Convert string describing one or more video standards into a mask of V4L
0012 // standard bits.  Return true if conversion succeeds otherwise return
0013 // false.  String is expected to be of the form: C1-x/y;C2-a/b where C1 and
0014 // C2 are color system names (e.g. "PAL", "NTSC") and x, y, a, and b are
0015 // modulation schemes (e.g. "M", "B", "G", etc).
0016 int pvr2_std_str_to_id(v4l2_std_id *idPtr,const char *bufPtr,
0017                unsigned int bufSize);
0018
0019 // Convert any arbitrary set of video standard bits into an unambiguous
0020 // readable string.  Return value is the number of bytes consumed in the
0021 // buffer.  The formatted string is of a form that can be parsed by our
0022 // sibling std_std_to_id() function.
0023 unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize,
0024                 v4l2_std_id id);
0025
0026 // Create an array of suitable v4l2_standard structures given a bit mask of
0027 // video standards to support.  The array is allocated from the heap, and
0028 // the number of elements is returned in the first argument.
0029 struct v4l2_standard *pvr2_std_create_enum(unsigned int *countptr,
0030                        v4l2_std_id id);
0031
0032 // Return mask of which video standard bits are valid
0033 v4l2_std_id pvr2_std_get_usable(void);
0034
0035 #endif /* __PVRUSB2_STD_H */