[gmpi] Re: Decision Time: 7.1.1
- From: Steve Harris <S.W.Harris@xxxxxxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Wed, 11 Jun 2003 08:47:30 +0100
On Tue, Jun 10, 2003 at 07:59:04 -0700, Chris Grigg wrote:
> Vincent said:
> >Interleaving buffer becomes a problem when there is many channels. And for
> >MultiBuses processing it's very boring to make the routing with interleaved
> >stereo, 3: 1 5:1 7:1 strips.
>
> Maybe there is still enough performance justification for stereo
> interleaving, even if not for arbitrary N channels? As Angus says,
> SIMD performance gains from interleave could and should be measured
> as a basis for this decision.
But the gain from using SIMD on mono buffers is at least as good, probably
better becuase of the beneficial cache effects.
> Making a standard -- and I say this based on a certain amount of
> experience in making standards -- is not about optimizing
> implementation time for any individual programmer. It is about
> optimizing the cost / benefit balance for the -average- company, in
> order to create the best -aggregate- results for the industry as a
> whole, and it's about finding a design that all the parties can agree
> to. It is rare for anyone to get exactly the feature set they want,
> and so making a standard quite often means more choices at
> implementation time than some individual programmers would prefer.
I also have some experince of the standardisation process (though usually
more hands-off than this ;) and I think that its important to get the
minimum number of implementation choices that will give you a
functionally complete standard.
It really is the stuff like that that makes standards unusably complex.
The exmaples in this particular field are obvious, and I'm not going to
name them.
> If I had to condense the essence of the standards-making group
> process into one sentence, it would probably be this: The individual
> has to give up a little control, and sometimes a little efficiency,
> for the good of the group; otherwise there is no agreement and
> therefore no standard.
That I agree with entirly, but it falls to people representing particular
viewpoints to stand up for thier corner in an effort to get a sane
standard.
If we all just stand around throwing features into the pot the end result
will be a waste of everyones effort.
- Steve
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