From: Laurent Aimar <fenrir@videolan.org>
Date: Sat, 19 Jul 2008 20:39:48 +0000 (+0200)
Subject: Fixed undenormalise for 64 bits.
X-Git-Tag: 0.9.0-test3~356^2~24
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;ds=sidebyside;h=8400d104d4236612af4b31ea1852383dcfe31c7f;p=vlc

Fixed undenormalise for 64 bits.
---

diff --git a/modules/audio_filter/spatializer/allpass.hpp b/modules/audio_filter/spatializer/allpass.hpp
index f907667c96..5a5a85fd75 100644
--- a/modules/audio_filter/spatializer/allpass.hpp
+++ b/modules/audio_filter/spatializer/allpass.hpp
@@ -32,8 +32,7 @@ inline float allpass::process(float input)
     float output;
     float bufout;
 
-    bufout = buffer[bufidx];
-    undenormalise(bufout);
+    bufout = undenormalise( buffer[bufidx] );
 
     output = -input + bufout;
     buffer[bufidx] = input + (bufout*feedback);
diff --git a/modules/audio_filter/spatializer/comb.hpp b/modules/audio_filter/spatializer/comb.hpp
index 2da83db602..8d35e90ce1 100644
--- a/modules/audio_filter/spatializer/comb.hpp
+++ b/modules/audio_filter/spatializer/comb.hpp
@@ -37,13 +37,11 @@ inline float comb::process(float input)
 {
     float output;
 
-    output = buffer[bufidx];
-    undenormalise(output);
+    output = undenormalise( buffer[bufidx] );
 
-    filterstore = (output*damp2) + (filterstore*damp1);
-    undenormalise(filterstore);
+    filterstore = undenormalise( output*damp2 + filterstore*damp1 );
 
-    buffer[bufidx] = input + (filterstore*feedback);
+    buffer[bufidx] = input + filterstore*feedback;
 
     if(++bufidx>=bufsize) bufidx = 0;
 
diff --git a/modules/audio_filter/spatializer/denormals.h b/modules/audio_filter/spatializer/denormals.h
index f871412714..bab45c6cdb 100644
--- a/modules/audio_filter/spatializer/denormals.h
+++ b/modules/audio_filter/spatializer/denormals.h
@@ -8,8 +8,16 @@
 #ifndef _denormals_
 #define _denormals_
 
-#define undenormalise(sample) if(((*(unsigned int*)&sample)&0x7f800000)==0) sample=0.0f
+#include <stdint.h>
+
+static inline float undenormalise( float f )
+{
+    union { float f; uint32_t u; } data;
+    data.f = f;
+    if( (data.u & 0x7f800000) == 0 )
+        return 0.0;
+    return f;
+}
 
 #endif//_denormals_
 
-//ends