32-bit ALSA application ABI-compatible on 64-bit Fedora Core 6?

32-bit ALSA application ABI-compatible on 64-bit Fedora Core 6?

[Daniel Yek]

Hi,

I installed 64-bit Fedora Core 6, hoping to be able to use 32-bit chroot 
environment on 64-bit OS, so that I can develop for both architectures on 
the same dev. machine.

So far, the compilation, etc., went well in the chroot environment. 
However, I have a problem playing audio clips from a 32-bit application on 
the 64-bit OS, making it less ideal as my 32-bit dev. machine. I heard 
fast-paced audio (with channels data mixed up, I believe, causing noise.) 
We somehow ended with 2-bit sample-width output (supposed to be 16-bit.)

At this point, I just want to gather some information, until I have time to 
delve further into it.

Is 32-bit ALSA application supposed to be able to play on a 64-bit OS (with 
parallel 32-bit + 64-bit libraries installed)? Is 32-bit alsa-lib 
ABI-compatible with the 64-bit ALSA module in the kernel?

As always, appreciate your insights! Thank you.


-- 
Daniel Yek


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Re: 32-bit ALSA application ABI-compatible on 64-bit Fedora Core 6?

[Takashi Iwai]

At Wed, 31 Jan 2007 07:51:43 -0800,
Daniel Yek wrote:
> 
> Hi,
> 
> I installed 64-bit Fedora Core 6, hoping to be able to use 32-bit chroot 
> environment on 64-bit OS, so that I can develop for both architectures on 
> the same dev. machine.
> 
> So far, the compilation, etc., went well in the chroot environment. 
> However, I have a problem playing audio clips from a 32-bit application on 
> the 64-bit OS, making it less ideal as my 32-bit dev. machine. I heard 
> fast-paced audio (with channels data mixed up, I believe, causing noise.) 
> We somehow ended with 2-bit sample-width output (supposed to be 16-bit.)
> 
> At this point, I just want to gather some information, until I have time to 
> delve further into it.
> 
> Is 32-bit ALSA application supposed to be able to play on a 64-bit OS (with 
> parallel 32-bit + 64-bit libraries installed)? Is 32-bit alsa-lib 
> ABI-compatible with the 64-bit ALSA module in the kernel?

Yes, as far as I've tested, it worked.  It was HD-audio.

If you're using dmix, try to run plughw for testing at first.
If this works, it's a problem with dmix.


Takashi

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