DMixer

DMixer

[SUJA JAMES]

Hi All,

I am looking for a software based mixer
implementation. Then,I came to know that ALSA has one
DMIX. Please let me know from where I will get the
source code for the same. I download the ALSA Driver
and Lib-plugins 1.0.9. But I am unable to find out the
source code. 

Can any one pin point the exact source code
location.(Not the mixer application, the Mixer
implementation)

Thanks,
Suja.

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Re: DMixer

[Lars Heineken]

Hi Suja,

I'm not 100 percent certain, but I would take a look at the "pcm_dmix_*"
files in the "src" folder of the alsa library. They contain generic and
optimized mixing code for different platforms.

Regards,

Lars.

SUJA JAMES wrote:

>Hi All,
>
>I am looking for a software based mixer
>implementation. Then,I came to know that ALSA has one
>DMIX. Please let me know from where I will get the
>source code for the same. I download the ALSA Driver
>and Lib-plugins 1.0.9. But I am unable to find out the
>source code. 
>
>Can any one pin point the exact source code
>location.(Not the mixer application, the Mixer
>implementation)
>
>Thanks,
>Suja.
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around 
>http://mail.yahoo.com 
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>_______________________________________________
>Alsa-devel mailing list
>Alsa-devel@lists.sourceforge.net
>https://lists.sourceforge.net/lists/listinfo/alsa-devel
>
>
>  
>




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GPL or LGPL

[SUJA JAMES]

Hi All,
I have one questain on ALSA license.
Whether it comes under GPL or LGPL. All the ALSA
module has MODULE_LICENSE("GPL") property.

I plan to write an ALSA driver and I need to keep my
hardware (DSP)communication/details as properitry.For
that I am making the DSP part a libarary and publish
that LIB in GPL.

Is this possible?

Thanks,
Suja


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Re: GPL or LGPL

[Ryan Underwood]

On Mon, Jul 18, 2005 at 06:42:54AM -0700, SUJA JAMES wrote:
> Hi All,
> I have one questain on ALSA license.
> Whether it comes under GPL or LGPL. All the ALSA
> module has MODULE_LICENSE("GPL") property.
> 
> I plan to write an ALSA driver and I need to keep my
> hardware (DSP)communication/details as properitry.For
> that I am making the DSP part a libarary and publish
> that LIB in GPL.

This doesn't make any sense.  How would you both keep your DSP details
proprietary *and* put them in a GPL library?  The result would be
undistributable.  No code that does not satisfy the requirements of the
GPL can be included in the ALSA driver that runs on the host PC, and
that would include any code for which the source is not available.

The best thing to do, if for some reason you can't put the DSP code in a
ROM on the card, and you can't release the DSP source, is to publish a
binary image of the DSP program and use the kernel firmware loader
(request_firmware() and friends) to load it at runtime.  There are
several ALSA drivers which already do this (and their firmwares are
included in the alsa-firmware package).  Note that this is still useless
if you do not include a license with your binary firmware image granting
full redistribution rights, so please do that.

-- 
Ryan Underwood, <nemesis@icequake.net>


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