ffmpeg | branch: master | Ganesh Ajjanagadde <gajjanaga...@gmail.com> | Tue Nov 10 22:26:25 2015 -0500| [94565f37919699ff1c6eaf684be85764452c0adc] | committer: Ganesh Ajjanagadde
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 <gajjanaga...@gmail.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=94565f37919699ff1c6eaf684be85764452c0adc --- libavcodec/ac3.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) 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 _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
