Hi Jason, On Fri, Feb 27, 2009 at 9:14 PM, Jason Daly <jd...@ist.ucf.edu> wrote: > So, is it your intention that the AudioSink interface would be implemented > by another plugin (e.g.: an "openal" plugin)?
That's a very good question... how to do we provide an AudioSink, and how far should we go in automating it. Tanguy's original implement has the AudioSink base classes attached to the custom FFmpegImageStream, so you'd read the movie in your application, then at the application level wire up the audio API to this image stream via a custom AuidoSink. My initial plan is to provide a similar solution - have the application wire up its own AudioSink to the AudioStream attached to the loaded ImageStream. The next step after this is open to debate. With integration of ffmpeg plugin I wasn't banking on tackling audio integration, but the fact that ffmpeg doesn't provide means of playing audio means that we have to provide some mechanism, the application wiring above is one solution, but it's not the out of the box solution that we currently have with xine-lib and quicktime so isn't a drop in replacement. To have a drop in replacement we'll need to provide a scheme to automatically provide the AudioSink. My current thoughts on how to provide this are that we could have an AudioSink prototype attached to osgDB::Registry that is NULL by default, but the application developer can assign one, and have this be cloned by the ffmpeg plugin etc. Potentially we could assign it on demand too if one isn't already assigned we could load a plugin such as a OpenAL to provide it. Further down the line perhaps the osgAudio library could provide the AudioSink prototype. I am open to suggestions on how best to address this issue. Two goals are clear - first that app developer should be able to provide their own audio implementation, and secondly a basic audio implementation should be loadable automatically as a fallback. Without the later we can't even consider deprecating the xine-lib and quicktime plugins. Robert. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
