From 9ae53c5860e17d087642d27b00dade071970a2e7 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Mon, 16 Sep 2013 10:11:32 -0400
Subject: [PATCH] lavc: add ff_u8_to_s8() for safe type punning of uint8_t to
int8_t
---
libavcodec/mathops.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/libavcodec/mathops.h b/libavcodec/mathops.h
index 8a2ce90d6a..6c216c25dc 100644
--- a/libavcodec/mathops.h
+++ b/libavcodec/mathops.h
@@ -224,4 +224,14 @@ static inline av_const unsigned int ff_sqrt(unsigned int a)
return b - (a < b * b);
}
+static inline int8_t ff_u8_to_s8(uint8_t a)
+{
+ union {
+ uint8_t u8;
+ int8_t s8;
+ } b;
+ b.u8 = a;
+ return b.s8;
+}
+
#endif /* AVCODEC_MATHOPS_H */