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: 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(+)

(limited to 'libavcodec/mathops.h')

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 */
-- 
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