[alsa-devel] alsa-lib support for compress offload

[Pierre-Louis Bossart]

>> It's a normal IEC958 passthrough, nothing to do with the compress
>> offload.  And, no, we have no support for compress API in alsa-lib
>> yet.  Just because no one submitted the patches.
>
> Thanks. I haven't used alsa-lib before but I might be able to send the
> patches if I get guidance of what needs doing. Is the expected API
> similar/same to what provided by tinycompress[1]?
>
> [1]
> http://git.alsa-project.org/?p=tinycompress.git;a=blob;f=include/tinycompress/tinycompress.h;h=03c396fccea5f2a176d24fd580ee6a447da657ec;hb=HEAD

Since there is no allowed processing/reformatting/reshuffling of 
compressed data, all the plugin system needs to be bypassed and you'd be 
looking at an alsa-lib API that interfaces directly with the ioctls, 
essentially replicating what tinycompress does. I agree it's not great 
to have independent packages, the decision to maintain tinycompress 
separately was driven by licensing concerns, not technical ones.
-Pierre