Attachment 48777 Details for Bug 115135

[patch] Patch committed to libvorbis SVN to fix this issue

vorbis-aliasing.patch (text/plain), 1.21 KB, created by Michael Smith on 2005-09-05 11:09:39 UTC

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Creator: Michael Smith

Created: 2005-09-05 11:09:39 UTC

Size: 1.21 KB

patch

obsolete

>Modified: trunk/vorbis/lib/scales.h
>===================================================================
>--- trunk/vorbis/lib/scales.h   2005-09-05 01:07:26 UTC (rev 9958)
>+++ trunk/vorbis/lib/scales.h   2005-09-05 11:04:48 UTC (rev 9959)
>@@ -26,20 +26,24 @@
> #ifdef VORBIS_IEEE_FLOAT32
>
> static float unitnorm(float x){
>-  ogg_uint32_t *ix=(ogg_uint32_t *)&x;
>-  *ix=(*ix&0x80000000UL)|(0x3f800000UL);
>-  return(x);
>+  union {
>+    ogg_uint32_t i;
>+    float f;
>+  } ix;
>+  ix.f = x;
>+  ix.i = (ix.i & 0x80000000U) | (0x3f800000U);
>+  return ix.f;
> }
>
>-static float FABS(float *x){
>-  ogg_uint32_t *ix=(ogg_uint32_t *)x;
>-  *ix&=0x7fffffffUL;
>-  return(*x);
>-}
>-
> /* Segher was off (too high) by ~ .3 decibel.  Center the conversion correctly. */
> static float todB(const float *x){
>-  return (float)((*(ogg_int32_t *)x)&0x7fffffff) * 7.17711438e-7f -764.6161886f;
>+  union {
>+    ogg_uint32_t i;
>+    float f;
>+  } ix;
>+  ix.f = *x;
>+  ix.i = ix.i&0x7fffffff;
>+  return (float)(ix.i * 7.17711438e-7f -764.6161886f);
> }
>
> #define todB_nn(x) todB(x)
>@@ -51,8 +55,6 @@
>  return(1.f);
> }
>
>-#define FABS(x) fabs(*(x))
>-
> #define todB(x)   (*(x)==0?-400.f:log(*(x)**(x))*4.34294480f)
> #define todB_nn(x)   (*(x)==0.f?-400.f:log(*(x))*8.6858896f)
>

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Attachments on bug 115135: 48763 | 48777