On Mon, Oct 29, 2001 at 09:03:53PM +0800, Daniel V. wrote:
> Hi all. I know this has been answered before but I can't find the post :(
> Anyway, the problem is I have a buffer of audio represented as floats [-1,+1]
> that I want to convert to signed shorts for writing to my card. I recall
> there is an efficient way of doing this, and an inefficient way. Can someone
> remind me with a snippet of code?
inline int f_round(float f) {
f += (3<<22);
return *((int*)&f) - 0x4b400000;
}
output = f_round(32768.0f * input)
You still need to clamp output to [SHRT_MIN,SHRT_MAX], otherwise you might
get overflow.
- Steve
