use android binary omx codec

[Nicolas Dufresne]

Le 2015-02-25 03:52, Aihua Zhao a écrit :
> Hi Experts:
> I'm trying to use android omx binary codec in some way, and noticed 
> the implementation from Ubuntu and Jolla.
> Ubuntu touch: 
> https://launchpad.net/distros/ubuntu/+source/gst-plugins-bad1.0
> Jolla: https://github.com/sailfishos/gst-omx

These are not completely specific to Ubuntu or Jolla, see:

http://cgit.freedesktop.org/gstreamer/gst-omx/
http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/

>
> from my understanding, Jolla uses omx binary directly 
> by android_dlopen(); while Ubuntu touch uses the codec from android 
> media codec service. both are in gstreamer world.

What Jolla people seems to try to add is android native buffers 
extension support. This is probably a special feature of Android OMX 
stack we don't support. OMX Always work by using dlopen() on libraries.

While I don't see what special in Ubuntu touch package. Seems like 
androidmedia we have upstream. In which case it requires dalvik VM 
running and implementing the right API.

One could consider integrating at StageFright level. I think there exist 
some attempt you may find on the Web. So far, gst-omx for binary OMX 
CODEC is probably your best bet. You will probably have to implement few 
more quirks and maybe try extensions like Jolla is doing.

Nicolas