Support for GstMeta (partial)

neilcsmith-net commented 3 years ago

Base support for GstMeta and mappings for GstVideoTimeCodeMeta.

Integrating and adapting code from PR #205 authored by Petr Lastovka.

neilcsmith-net commented 3 years ago

[x] Move contents of meta package to main packages, except for VideoTimeCodeMeta.
[x] Move VideoTimeCodeMeta and contents of timecode package to video package.
[x] Meta should be a NativeObject subclass.
[x] Remove all lowlevel types from API.
[x] Add GstMetaPtr typed pointer with ability to extract GType.
[x] Work out better class to GType lookup for registered types? Or other way to get GType to pass to native layer.
[x] Fix tests - all skipped because right version not initialized!

Above marries up better with upstream layout and Rust / C# bindings.

neilcsmith-net commented 3 years ago

Related conversation on GStreamer devel about type relationships / other bindings - https://lists.freedesktop.org/archives/gstreamer-devel/2020-October/076302.html

neilcsmith-net commented 3 years ago

Hi @aveco-devel can you take a look at this, give your thoughts, and see if it still covers all you need it to? I'll look to merge this functionality into master soon, then look at mapping some of the other meta types. Thanks!

gstreamer-java / gst1-java-core

Support for GstMeta (partial) #208