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27 lines
978 B
Diff
27 lines
978 B
Diff
From 89511a9bed41f808485d13d2bd9b82f642bfa460 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Wed, 31 Oct 2018 14:58:08 +0000
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Subject: [PATCH] media: videodev2: Add helper defines for printing FOURCCs
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New helper defines that allow printing of a FOURCC using
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printf(V4L2_FOURCC_CONV, V4L2_FOURCC_CONV_ARGS(fourcc));
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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include/uapi/linux/videodev2.h | 5 +++++
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1 file changed, 5 insertions(+)
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--- a/include/uapi/linux/videodev2.h
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+++ b/include/uapi/linux/videodev2.h
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@@ -82,6 +82,11 @@
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((__u32)(a) | ((__u32)(b) << 8) | ((__u32)(c) << 16) | ((__u32)(d) << 24))
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#define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1U << 31))
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+#define V4L2_FOURCC_CONV "%c%c%c%c%s"
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+#define V4L2_FOURCC_CONV_ARGS(fourcc) \
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+ (fourcc) & 0x7f, ((fourcc) >> 8) & 0x7f, ((fourcc) >> 16) & 0x7f, \
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+ ((fourcc) >> 24) & 0x7f, (fourcc) & BIT(31) ? "-BE" : ""
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+
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/*
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* E N U M S
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*/
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