openwrt/package/libvorbis/patches/libvorbis-1.1.1-gcc4-1.patch

   1 Submitted By: Steffen Knollmann <sknolli at astro.physik.uni-goettingen.de>
   2 Date: 2005-11-09
   3 Initial Package Version: 1.1.1
   4 Upstream Status: From Upstream
   5 Origin: msmith, courtesy of upstream SVN
   6 Description: Fixes an optimization problem with gcc-4.0.x that results in
   7              dysfunctional library that will produce bigger encoded files
   8              with a poor audio quality. Detailed description at:
   9              http://trac.xiph.org/cgi-bin/trac.cgi/ticket/583
  10
  11 $LastChangedBy: randy $
  12 $Date: 2005-11-18 08:12:42 -0700 (Fri, 18 Nov 2005) $
  13
  14
  15 --- libvorbis-1.1.1/lib/scales.h        (revision 9958)
  16 +++ libvorbis-1.1.1/lib/scales.h        (revision 9959)
  17 @@ -26,20 +26,24 @@
  18  #ifdef VORBIS_IEEE_FLOAT32
  19
  20  static float unitnorm(float x){
  21 -  ogg_uint32_t *ix=(ogg_uint32_t *)&x;
  22 -  *ix=(*ix&0x80000000UL)|(0x3f800000UL);
  23 -  return(x);
  24 -}
  25 -
  26 -static float FABS(float *x){
  27 -  ogg_uint32_t *ix=(ogg_uint32_t *)x;
  28 -  *ix&=0x7fffffffUL;
  29 -  return(*x);
  30 +  union {
  31 +    ogg_uint32_t i;
  32 +    float f;
  33 +  } ix;
  34 +  ix.f = x;
  35 +  ix.i = (ix.i & 0x80000000U) | (0x3f800000U);
  36 +  return ix.f;
  37  }
  38
  39  /* Segher was off (too high) by ~ .3 decibel.  Center the conversion correctly. */
  40  static float todB(const float *x){
  41 -  return (float)((*(ogg_int32_t *)x)&0x7fffffff) * 7.17711438e-7f -764.6161886f;
  42 +  union {
  43 +    ogg_uint32_t i;
  44 +    float f;
  45 +  } ix;
  46 +  ix.f = *x;
  47 +  ix.i = ix.i&0x7fffffff;
  48 +  return (float)(ix.i * 7.17711438e-7f -764.6161886f);
  49  }
  50
  51  #define todB_nn(x) todB(x)
  52 @@ -51,8 +55,6 @@
  53    return(1.f);
  54  }
  55
  56 -#define FABS(x) fabs(*(x))
  57 -
  58  #define todB(x)   (*(x)==0?-400.f:log(*(x)**(x))*4.34294480f)
  59  #define todB_nn(x)   (*(x)==0.f?-400.f:log(*(x))*8.6858896f)
  60