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media: videodev2: Add helper defines for printing FOURCCs

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New helper defines that allow printing of a FOURCC using
printf(V4L2_FOURCC_CONV, V4L2_FOURCC_CONV_ARGS(fourcc));

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
This commit is contained in:
Dave Stevenson
2018-10-31 14:58:08 +00:00
committed by Dom Cobley
parent b82dab7e9f
commit ca86fc0836
1 changed files with 5 additions and 0 deletions
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5
include/uapi/linux/videodev2.h
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@@ -82,6 +82,11 @@
((__u32)(a) | ((__u32)(b) << 8) | ((__u32)(c) << 16) | ((__u32)(d) << 24))
#define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1U << 31))
#define V4L2_FOURCC_CONV "%c%c%c%c%s"
#define V4L2_FOURCC_CONV_ARGS(fourcc) \
(fourcc) & 0x7f, ((fourcc) >> 8) & 0x7f, ((fourcc) >> 16) & 0x7f, \
((fourcc) >> 24) & 0x7f, (fourcc) & BIT(31) ? "-BE" : ""
/*
* E N U M S
*/