[Speex-dev] Floating point implementation

Matt Bucknall matt at mattbucknall.com
Tue Oct 9 01:47:53 PDT 2007

Excellent, thanks for the info.


Jean-Marc Valin wrote:
>> I'm fairly new to Speex, so please forgive me if this question has an
>> obvious answer. I'm currently studying the source code to understand how
>> Speex works and wondered, is there still a floating-point implementation
>> I could look at as the fixed-point stuff makes it a little difficult to
>> see what the code is doing.
> Actually, the floating-point implementation is the same as the
> fixed-point. The only change is that for float, operators like MULT16_16
> just change into "*" and shifts disappear.
> Another option you have is to look at the 1.0.5 source code. In that
> case, just be aware that several things have been changed since then and
> that newer versions are computing some of the things differently (more
> efficiently). Of course, despite reworking some bits and removing
> redundant calculations, it's still the same overall algorithm (because
> it's perfectly compatible with 1.2beta2).
> 	Jean-Marc

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