From: Loren Merritt <lorenm@u.washington.edu>
Date: Tue, 12 Aug 2008 00:34:08 +0000 (+0000)
Subject: remove a float->double->float conversion.
X-Git-Tag: v0.5~3196
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e8dd7b0c9a3d61a2a5be7e763e5bdde486cdfc29;p=platform%2Fupstream%2Flibav.git

remove a float->double->float conversion.
1.8x faster imdct_c with fpmath=sse, no change with x87

Originally committed as revision 14701 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavcodec/mdct.c b/libavcodec/mdct.c
index 86d447b..069ad5b 100644
--- a/libavcodec/mdct.c
+++ b/libavcodec/mdct.c
@@ -92,10 +92,10 @@ int ff_mdct_init(MDCTContext *s, int nbits, int inverse)
 /* complex multiplication: p = a * b */
 #define CMUL(pre, pim, are, aim, bre, bim) \
 {\
-    double _are = (are);\
-    double _aim = (aim);\
-    double _bre = (bre);\
-    double _bim = (bim);\
+    FFTSample _are = (are);\
+    FFTSample _aim = (aim);\
+    FFTSample _bre = (bre);\
+    FFTSample _bim = (bim);\
     (pre) = _are * _bre - _aim * _bim;\
     (pim) = _are * _bim + _aim * _bre;\
 }