Hi all, I've been trying to understand the audio (and multimedia) framework on the 770, but with not much success. There seems to be a shortage on documentation on this subject, or maybe I just don't know how to find it.
So this far I've managed to figure out that on the 770 the multimedia stuff is built on gstreamer (GST) and esound (ESD) and that you can use SDL for low level access to audio and video output [1]. I've also tried to write to /dev/dsp on scratchbox, which works just fine, so I'm led to believe that scratchbox is OSS enabled. The problems I've encountered so far are: ESD unfortunately refuses to start on scratchbox because of missing /dev/dsptask/pcm1. And 770 OTOH is missing esddsp, which I believe could be used as a wrapper to allow all those applications, who use /dev/dsp, to work without modifications. Also missing on 770 are some gst-utilities like gst-inspect and gst-launch. So my questions (for now) are: could someone, who knows the multimedia system well, write a small (or maybe even comprehensive) howto or a tutorial on the subject to Maemo Wiki? What is osso-media-server? Is using libSDL really the best way to write sound related applicatons for 770 (like is done with OggPlay)? For me it looks like a work-around, unless you are into games development, while using ESD or GST directly would be the right thing(tm) to do. How about making scratchbox 770 compatible in respect to ESD? Is this difficult to do yourself? This would make development and testing easier. Quite a long post and lots of questions, but this seems to be surprisingly complicated subject. Cheers, Teemu References: [1] http://www.maemo.org/platform/docs/maemo_exec_whitepaper.html _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
