diff options
| author | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-11-10 22:26:25 -0500 |
|---|---|---|
| committer | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-11-22 16:16:16 -0500 |
| commit | 94565f37919699ff1c6eaf684be85764452c0adc (patch) | |
| tree | 811467cbaf3386ee0f2b1fe5e58e20a5ef992c0a /libavcodec/ac3.h | |
| parent | 18b4016431d95ea1890dee8cfe6e5616e95fcea1 (diff) | |
avcodec/ac3: use M_SQRT1_2, M_SQRT2
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 <u@pkh.me>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Diffstat (limited to 'libavcodec/ac3.h')
| -rw-r--r-- | libavcodec/ac3.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h index ff36249045..747f2f561d 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 |