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

[Qais Yousef]

Hi,

As far as I understand I need to use something similar to tinycompress 
to use alsa devices that supports compress offload. When I asked on 
gstreamer list [1] about alsasink support for compress offload they said 
yes. But I can see that gstalsasink.c [2] only uses the standard 
alsa-lib api which AFAICT doesn't support compress offload.

Did I misread the code and alsa-lib actually works with compress 
offload? Gstreamer refers to the feature "passthrough" and associate it 
with SPDIF[3], are they taking advantage of some other alsa feature that 
looks like compress offload?

Thanks,
Qais

[1] 
http://gstreamer-devel.966125.n4.nabble.com/ALSA-Compress-Offload-support-td4670153.html
[2] 
http://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/ext/alsa/gstalsasink.c#n836
[3] 
http://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/ext/alsa/gstalsa.c#n437