diff options
| author | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-11-14 10:55:10 -0500 |
|---|---|---|
| committer | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-11-14 10:58:39 -0500 |
| commit | 618b3ae7d4a90a0b4a25995bf54896cdee129a5b (patch) | |
| tree | 761a0bf6a64d8a4ab04731ae639946ac79d07aa9 /libavcodec/simple_idct.c | |
| parent | 11f0acf829e26279c5f2a414c6860bd4933f29af (diff) | |
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 <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Diffstat (limited to 'libavcodec/simple_idct.c')
| -rw-r--r-- | libavcodec/simple_idct.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/simple_idct.c b/libavcodec/simple_idct.c index 4d6d20df5a..0711e167a5 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) |