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author | David Robillard <d@drobilla.net> | 2020-03-22 16:36:44 +0100 |
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committer | David Robillard <d@drobilla.net> | 2020-04-10 19:46:04 +0200 |
commit | 430284545345539c9ffb31df889debac1d3888b5 (patch) | |
tree | dc9bb1f32f0d6fe34a7339221389048e199f14a5 /lv2/options/options.meta.ttl | |
parent | c4514483da1ab4f49148f9c4fe4ff5b559323217 (diff) | |
download | lv2-430284545345539c9ffb31df889debac1d3888b5.tar.xz |
Move documentation to metadata files and convert it to Markdown
Diffstat (limited to 'lv2/options/options.meta.ttl')
-rw-r--r-- | lv2/options/options.meta.ttl | 90 |
1 files changed, 88 insertions, 2 deletions
diff --git a/lv2/options/options.meta.ttl b/lv2/options/options.meta.ttl index c0f598d..d545f95 100644 --- a/lv2/options/options.meta.ttl +++ b/lv2/options/options.meta.ttl @@ -1,12 +1,15 @@ @prefix dcs: <http://ontologi.es/doap-changeset#> . @prefix doap: <http://usefulinc.com/ns/doap#> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . +@prefix lv2: <http://lv2plug.in/ns/lv2core#> . +@prefix opts: <http://lv2plug.in/ns/ext/options#> . +@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . <http://lv2plug.in/ns/ext/options> a doap:Project ; doap:name "LV2 Options" ; - doap:shortdesc "Instantiation time options." ; + doap:shortdesc "Runtime options for LV2 plugins and UIs." ; doap:created "2012-08-20" ; doap:developer <http://drobilla.net/drobilla#me> ; doap:release [ @@ -39,5 +42,88 @@ rdfs:label "Initial release." ] ] - ] . + ] ; + lv2:documentation """ + +This extension defines a facility for <q>options</q>, which are values the host +passes to a plugin or UI at run time. + +There are two facilities for passing options to an instance: opts:options +allows passing options at instantiation time, and the opts:interface interface +allows options to be dynamically set and retrieved after instantiation. + +Note that this extension is only for allowing hosts to configure plugins, and +is not a <q>live</q> control mechanism. For real-time control, use event-based +control via an atom:AtomPort with an atom:Sequence buffer. + +Instances may indicate they require an option with the opts:requiredOption +property, or that they optionally support an option with the +opts:supportedOption property. + +"""^^lv2:Markdown . + +opts:Option + lv2:documentation """ + +It is not required for a property to explicitly be an Option in order to be +used as such. However, properties which are primarily intended for use as +options, or are at least particularly useful as options, should be explicitly +given this type for documentation purposes, and to assist hosts in discovering +option definitions. + +"""^^lv2:Markdown . + +opts:interface + lv2:documentation """ + +An interface (LV2_Options_Interface) for dynamically setting and getting +options. Note that this is intended for use by the host for configuring +plugins only, and is not a <q>live</q> plugin control mechanism. + +The plugin data file should advertise this interface like so: + + :::turtle + @prefix opts: <http://lv2plug.in/ns/ext/options#> . + + <plugin> + a lv2:Plugin ; + lv2:extensionData opts:interface . + +"""^^lv2:Markdown . + +opts:options + lv2:documentation """ + +To implement this feature, hosts MUST pass an LV2_Feature to the appropriate +instantiate method with this URI and data pointed to an array of +LV2_Options_Option terminated by an element with both key and value set to +zero. The instance should cast this data pointer to `const +LV2_Options_Option*` and scan the array for any options of interest. The +instance MUST NOT modify the options array in any way. + +Note that requiring this feature may reduce the number of compatible hosts. +Unless some options are strictly required by the instance, this feature SHOULD +be listed as an lv2:optionalFeature. + +"""^^lv2:Markdown . + +opts:requiredOption + lv2:documentation """ + +The host MUST pass a value for the specified option via opts:options during +instantiation. + +Note that use of this property may reduce the number of compatible hosts. +Wherever possible, it is better to list options with opts:supportedOption and +fall back to a reasonable default value if it is not provided. + +"""^^lv2:Markdown . + +opts:supportedOption + lv2:documentation """ + +The host SHOULD provide a value for the specified option if one is known, or +provide the user an opportunity to specify one if possible. + +"""^^lv2:Markdown . |