[Bf-committers] Re: Sound System cleanup, using SDL

[Ton Roosendaal]

Hi,

Just reported in tracker: wav files written with linux crash osx  
Blender:
http://projects.blender.org/tracker/? 
func=detail&atid=264&aid=6198&group_id=9

It's in fact an old issue. OpenAL has proven to be instable and not  
realiable.
If you ask me, kick it out completely. The OpenAL "3d rendering" and  
"doppler" features for the game engine are probably just simple effects  
we can code ourselves.

Csaba: if you like to refactor audio, please go ahead.
- keep using the API in blender's Soundsystem library
- kill openAL
- make it all using SDL, but using wrapper (so we can move to other  
soundsystem too)

It would also help if you log your work in wiki, and regularly report  
here or in irc. Makes it more realistic that we will include the code  
in official releases.

Thanks,

-Ton-


On 11 Mar, 2007, at 14:24, Alexander Ewering wrote:

>
> On Sun, 11 Mar 2007, Peter Schlaile wrote:
>
>> Hi,
>>
>>> Is the Project Openings list up to date?
>>> Especially the Sound System cleanup task.
>>> I am famailiar with SDL and I want to the cleanup work.
>>
>> can anyone explain to me, why we don't just use one of the two?
>> (Open AL _or_ SDL)?
>>
>> If I understand it correctly, one probably should use OpenAL all over  
>> the
>> place because of it's 3D-sound features.
>>
>> Or is there anything Open-AL can't do, what SDL can do?
>
> Back when I implemented sound for the sequencer, SDL was the easiest  
> and
> obvious option for me, and it started as an in-house feature anyway.
>
> I also looked at OpenAL because it was already in Blender, but frankly,
> OpenAL appeared so low-quality (very bad docs, very instable (didn't  
> even
> work here in the Game engine)) that I used SDL instead (which I was  
> already
> familiar with).
>
> Of course, if OpenAL supports the two crucial features for sound in
> animation (querying the current sample buffer position and low  
> latency),
> then it should replace SDL.
>
> I also wrote an entire 3d soundsystem of my own, which uses SDL for  
> output,
> so in fact, instinctive-blender completely dropped OpenAL and uses SDL  
> for
> both the gameengine and the sequencer (which is the other way around  
> from
> what you suggest). I think the sources are up...
>
> | alexander ewering              instinctive mediaworks
> | xx-mail.com/instinctive     http://www.instinctive.de
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>
------------------------------------------------------------------------ 
--
Ton Roosendaal  Blender Foundation ton at blender.org  
http://www.blender.org