ffmpeg | branch: master | Ganesh Ajjanagadde <gajjanaga...@gmail.com> | Sat Nov 14 10:55:10 2015 -0500| [618b3ae7d4a90a0b4a25995bf54896cdee129a5b] | committer: Ganesh Ajjanagadde
avcodec/simple_idct: use predefined M_SQRT2 M_SQRT2 is defined in math.h, or in avutil/mathematics.h for compatibility hacks. This uses this value instead of a floating literal. Fixed point values produced by C_FIX(), R_FIX() remain identical. Reviewed-by: Michael Niedermayer <mich...@niedermayer.cc> Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=618b3ae7d4a90a0b4a25995bf54896cdee129a5b --- libavcodec/simple_idct.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/simple_idct.c b/libavcodec/simple_idct.c index 4d6d20d..0711e16 100644 --- a/libavcodec/simple_idct.c +++ b/libavcodec/simple_idct.c @@ -132,7 +132,7 @@ void ff_simple_idct248_put(uint8_t *dest, int line_size, int16_t *block) #undef C1 #undef C2 #define CN_SHIFT 12 -#define C_FIX(x) ((int)((x) * 1.414213562 * (1 << CN_SHIFT) + 0.5)) +#define C_FIX(x) ((int)((x) * M_SQRT2 * (1 << CN_SHIFT) + 0.5)) #define C1 C_FIX(0.6532814824) #define C2 C_FIX(0.2705980501) #define C3 C_FIX(0.5) @@ -159,7 +159,7 @@ static inline void idct4col_add(uint8_t *dest, int line_size, const int16_t *col } #define RN_SHIFT 15 -#define R_FIX(x) ((int)((x) * 1.414213562 * (1 << RN_SHIFT) + 0.5)) +#define R_FIX(x) ((int)((x) * M_SQRT2 * (1 << RN_SHIFT) + 0.5)) #define R1 R_FIX(0.6532814824) #define R2 R_FIX(0.2705980501) #define R3 R_FIX(0.5) _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog