[Bf-committers] Job stoppers! Need a decision urgent :(

[Jürgen Herrmann]

Hi Brecht, Hi Thomas,

according to CUDA-Dev team a CUDA 5.5 RC will be published this Month, but it's only a RC so it may have bugs ...
I had a look into the sources of Jack and I'll try to get that issue fixed. It seems to be a callback problem like the Win32 API crashes I had with Ghost before.
Taking out this issue will take some time, as I'll try to fix this with proper and supply patches for the jack devs.

OpenAL is another problem, it seems that OpenAL soft has a problem with 3D sound if sound samples are 44.1khz encoded while the Windows Soundsystem uses 48khz. I guess that oal_wrap.dll is the one that forces the Soundsystem into 44.1khz mode. 
So we'll have to code a replacement for oal_wrap that does this for us.
I'll look into that too but I don't know how long this will take. My knowledge of the windows APIs is ok I guess, but mmsystem is new to me.

With all these little obstacles I think 2.7 is a good goal for us to switch to VC2012 for releases.
Another problem is windows xp support with binaries built with vc11. MS provides the vc110_xp target with update 1 but some features don't work with these libs as they are only WinSDK 7.1 headers with modifications.
Best bet would be to build blender 32bit with XP support and the 64 bit build without.
Or drop XP support completely. (My favorite :-D) But there are still users with old XP machines...

/Jürgen


Am 14.05.2013 um 23:15 schrieb Thomas Dinges <blender at dingto.org>:

> Hi,
> I would also not rush things. We can provide vc2012 builds for 2.68 as 
> optional binaries for testing, but for official usage it's too early.
> We also have to wait for nvidia, to support vc2012 for the CUDA kernels.
> 
> Thomas
> 
> Am 14.05.2013 23:11, schrieb Brecht Van Lommel:
>> Don't we have plenty of time to work out issues before we build an
>> official release with vs2012? If we use it for 2.68 that's still about
>> 2 months away.
>> 
>> Anyway, the solution is to solve these crashes, either by figuring out
>> why it crashes and trying to fix that, or using newer libraries. I
>> don't know what the cause of the crash is, or why 3D sound doesn't
>> work with OpenAL-soft. But this can be investigated, both OpenAL-soft
>> and Jack are open source, just needs a developer to spend some time on
>> this.
>> 
>> Brecht.
>> 
>> On Tue, May 14, 2013 at 10:09 PM, Jürgen Herrmann <shadowrom at me.com> wrote:
>>> I found new job stoppers on VS2012 ... Again!
>>> First if all OpenAL is old (2009) and makes blender Crash on windows 8 64bit system, when blender is compiled with VC11.
>>> Possible solution: switch to OpenAL-soft and. That could actually break 3D sound.
>>> 
>>> Second: Jack, same problem here'
>>> Possible solution: Try to recompile libjack with newer MinGW and patches to the lib...
>>> and hope that it works.
>>> 
>>> Another solution for both problems would be to stay with VC2008 or we don't support Win8 64 (bad choices IMHO)
>>> 
>>> We could also disable these libs and ship blender without them, I think this will bring us the wrath of many users...
>>> 
>>> I need help with this decisions.
>>> 
>>> /Jürgen
>>> 
>>> 
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> 
> -- 
> Thomas Dinges
> Blender Developer, Artist and Musician
> 
> www.dingto.org
> 
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