On 2014-11-24 4:12 PM, Zhang Peixuan wrote: > I'm a programmer, I want to develop plug-ins to extend the functions of > Firefox. I want to add some video decoder support (such as HEVC) to Firefox > by using plug-ins.
If you mean plug-ins in the sense of https://addons.mozilla.org/ this isn't possible. Those can only hook behaviour changes through xpcom or js-ctypes. The format white-listing and decoder dispatch happens in pure C++ code, and there's no way to affect that without doing a separate build of the gecko engine. > My goal is to play hevc video just by writing html5 <video> tags can play > hevc video (don't add JavaScript code). I just want to write HECV decoder > by plus-ins, is it possible? We are developing a 'Gecko Media Plugin' interface which we're using for loading the OpenH264.org decoder implementation as a separate plug-in. That might be a useful place to start for a project like this, although the complete plumbing hasn't been added since OpenH264 doesn't support main or high profiles yet. http://dxr.mozilla.org/mozilla-central/source/dom/media/gmp/gmp-api However, you'll still have to make custom builds of Firefox for your plug-in to be used. Mozilla tries hard to limit the codecs exposed to web pages for strategic reasons. Convincing the organization to allow an HEVC plugin in the official Firefox will be a difficult battle. There is some interest in supporting codecs implemented in javacript, so that's another avenue you might consider. We especially need research into what platform features would help implementation performance: simd extensions to js, webgl extensions, interfaces to have the native playback code call a js decoder, etc. Hope that helps, and thanks for your interest in Firefox. -r _______________________________________________ dev-media mailing list [email protected] https://lists.mozilla.org/listinfo/dev-media
