From 94565f37919699ff1c6eaf684be85764452c0adc Mon Sep 17 00:00:00 2001 From: Ganesh Ajjanagadde Date: Tue, 10 Nov 2015 22:26:25 -0500 Subject: avcodec/ac3: use M_SQRT1_2, M_SQRT2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This uses M_SQRT1_2, M_SQRT2 instead of the actual literals. This yields greater precision in some places in avcodec/ac3, while fixed point values remain unchanged. Reviewed-by: Clément Bœsch Signed-off-by: Ganesh Ajjanagadde --- libavcodec/ac3.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'libavcodec/ac3.h') diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h index ff36249..747f2f5 100644 --- a/libavcodec/ac3.h +++ b/libavcodec/ac3.h @@ -97,13 +97,13 @@ typedef float SHORTFLOAT; #endif /* USE_FIXED */ -#define AC3_LEVEL(x) ROUND15((x) * FIXR15(0.7071067811865476)) +#define AC3_LEVEL(x) ROUND15((x) * FIXR15(M_SQRT1_2)) /* pre-defined gain values */ -#define LEVEL_PLUS_3DB 1.4142135623730950 +#define LEVEL_PLUS_3DB M_SQRT2 #define LEVEL_PLUS_1POINT5DB 1.1892071150027209 #define LEVEL_MINUS_1POINT5DB 0.8408964152537145 -#define LEVEL_MINUS_3DB 0.7071067811865476 +#define LEVEL_MINUS_3DB M_SQRT1_2 #define LEVEL_MINUS_4POINT5DB 0.5946035575013605 #define LEVEL_MINUS_6DB 0.5000000000000000 #define LEVEL_MINUS_9DB 0.3535533905932738 -- cgit v1.1