[sdlsound] SDL_sound v2's internal mixer format...

Tyler Montbriand tsm at accesscomm.ca
Tue Aug 10 11:08:46 EDT 2004

I accidentally sent that before I was ready, my apologies.  Here's the 
corrected code:

  #include <stdio.h>
  #include <SDL/SDL_types.h>

  typedef union intfloat
    Uint32 ival;
    float fval;
  } intfloat;

  /* Converts an int into a float with range [-1.0,1.0) */
  float quickfloat(Uint16 val)
    /* 2.0f:  01000000 00000000 00000000 00000000 b */
    intfloat f;

  int main(int argc, char *argv[])
    int n;
    Uint16 vals[]={0x0000,0x8000,0xffff};

    for(n=0; n<3; n++)
      printf("%5i -> %f\n",vals[n],quickfloat(vals[n]));


> From a conceptual point of view, it seems that float
> is the "proper" way of handling clipping.
True, it'll never clip, but that can actually be a problem;  instead of 
clipping, it loses accuracy.  

> (As graphics have moved from int to float, I kind of expect audio to
> do the same.)
Actually, graphics are still integer.  OpenGL can take floats(but it doesn't 
have to), but it still renders to integers.  The movement to floating-point 
audio kind of already happened with formats like MP3.

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