avcodec/mpegaudio: 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 an ad-hoc define.

Fixed point values produced by FIX() remain identical.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/libavcodec/mpegaudioenc_template.c b/libavcodec/mpegaudioenc_template.c
index ce93cc7c6d..b91d0a8895 100644
--- a/libavcodec/mpegaudioenc_template.c
+++ b/libavcodec/mpegaudioenc_template.c
@@ -244,11 +244,11 @@ static void idct32(int *out, int *tab)
     do {
         int x1, x2, x3, x4;
 
-        x3 = MUL(t[16], FIX(SQRT2*0.5));
+        x3 = MUL(t[16], FIX(M_SQRT2*0.5));
         x4 = t[0] - x3;
         x3 = t[0] + x3;
 
-        x2 = MUL(-(t[24] + t[8]), FIX(SQRT2*0.5));
+        x2 = MUL(-(t[24] + t[8]), FIX(M_SQRT2*0.5));
         x1 = MUL((t[8] - x2), xp[0]);
         x2 = MUL((t[8] + x2), xp[1]);