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avcodec/ppc/fdctdsp: use more accurate constants 

Whoever wrote this stuff had a pretty bad libm - digits differ pretty
quickly.

Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
This commit is contained in:
Ganesh Ajjanagadde 2015-11-13 11:18:37 -05:00
parent 736e2e2c30
commit 789ef087c6
1 changed files with 7 additions and 7 deletions
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14
libavcodec/ppc/fdctdsp.c
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@ -37,13 +37,13 @@
#define vu16(v) ((vector unsigned short) (v))
#define vu32(v) ((vector unsigned int) (v))
#define C1 0.98078525066375732421875000 /* cos(1 * PI / 16) */
#define C2 0.92387950420379638671875000 /* cos(2 * PI / 16) */
#define C3 0.83146959543228149414062500 /* cos(3 * PI / 16) */
#define C4 0.70710676908493041992187500 /* cos(4 * PI / 16) */
#define C5 0.55557024478912353515625000 /* cos(5 * PI / 16) */
#define C6 0.38268342614173889160156250 /* cos(6 * PI / 16) */
#define C7 0.19509032368659973144531250 /* cos(7 * PI / 16) */
#define C1 0.98078528040323044912618224 /* cos(1 * PI / 16) */
#define C2 0.92387953251128675612818319 /* cos(2 * PI / 16) */
#define C3 0.83146961230254523707878838 /* cos(3 * PI / 16) */
#define C4 0.70710678118654752440084436 /* cos(4 * PI / 16) */
#define C5 0.55557023301960222474283081 /* cos(5 * PI / 16) */
#define C6 0.38268343236508977172845998 /* cos(6 * PI / 16) */
#define C7 0.19509032201612826784828487 /* cos(7 * PI / 16) */
#define W0 -(2 * C2)
#define W1 (2 * C6)