2009-11-09 14:20:52 +00:00
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Registry Change Hooks
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This document proposes a mechnism to register on registry updates.
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Last edited: 2009-11-09 Stefan Kost
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Current Behaviour
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-----------------
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When new plugins are installed or some are removed, the next application that
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runs rebuiilds the registry. Any application that runs later on won't know about
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it.
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Problem
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-------
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Some usecases need to cache gstreamer capabilities. They need to know when the
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cache needs to be rebuilt. We could either export the registry mtime as api or
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do the following.
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2009-12-03 13:27:21 +00:00
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This gets more useful once we can have more plugin/element metadata in the
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registry (e.g. mime-types for demuxers and codecs, see
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http://www.rfc-editor.org/rfc/rfc4281.txt).
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2009-11-09 14:20:52 +00:00
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Proposal
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--------
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We add a ~/.gstreamer-0.10/registry-hooks directory. Applications can install
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scripts there. When the registry is rebuild, those scripts are run async in no
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specific order. There is no feedback channel (return values, stdout/err).
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Examples
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---------
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gst-inspector
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-------------
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it would install a script that simply deletes its cachefile.
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gupnp
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-----
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it would install a script that runs gst-inspect-0.10 --print-plugin-auto-install-info
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and post process it.
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totem,banshee,rythmbox
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-----------------------
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they could tune the "MimeType=" lists in their desktop files
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Open Items
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----------
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Should we have a gst-registry-hook script with --install/--remove/--list actions
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to manage hooks?
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