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Diffstat (limited to 'lv2/buf-size.lv2')
-rw-r--r-- | lv2/buf-size.lv2/buf-size.meta.ttl | 157 | ||||
-rw-r--r-- | lv2/buf-size.lv2/buf-size.ttl | 68 | ||||
-rw-r--r-- | lv2/buf-size.lv2/manifest.ttl | 9 |
3 files changed, 234 insertions, 0 deletions
diff --git a/lv2/buf-size.lv2/buf-size.meta.ttl b/lv2/buf-size.lv2/buf-size.meta.ttl new file mode 100644 index 0000000..b1d8011 --- /dev/null +++ b/lv2/buf-size.lv2/buf-size.meta.ttl @@ -0,0 +1,157 @@ +@prefix bufsz: <http://lv2plug.in/ns/ext/buf-size#> . +@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 rdfs: <http://www.w3.org/2000/01/rdf-schema#> . + +<http://lv2plug.in/ns/ext/buf-size> + a doap:Project ; + doap:name "LV2 Buf Size" ; + doap:shortdesc "Access to, and restrictions on, buffer sizes." ; + doap:created "2012-08-07" ; + doap:developer <http://drobilla.net/drobilla#me> ; + doap:release [ + doap:revision "1.4" ; + doap:created "2015-09-18" ; + doap:file-release <http://lv2plug.in/spec/lv2-1.14.0.tar.bz2> ; + dcs:blame <http://drobilla.net/drobilla#me> ; + dcs:changeset [ + dcs:item [ + rdfs:label "Add bufsz:nominalBlockLength option." + ] , [ + rdfs:label "Add bufsz:coarseBlockLength feature." + ] + ] + ] , [ + doap:revision "1.2" ; + doap:created "2012-12-21" ; + doap:file-release <http://lv2plug.in/spec/lv2-1.4.0.tar.bz2> ; + dcs:blame <http://drobilla.net/drobilla#me> ; + dcs:changeset [ + dcs:item [ + rdfs:label "Fix typo in bufsz:sequenceSize label." + ] + ] + ] , [ + doap:revision "1.0" ; + doap:created "2012-10-14" ; + doap:file-release <http://lv2plug.in/spec/lv2-1.2.0.tar.bz2> ; + dcs:blame <http://drobilla.net/drobilla#me> ; + dcs:changeset [ + dcs:item [ + rdfs:label "Initial release." + ] + ] + ] ; + lv2:documentation """ + +This extension defines a facility for plugins to get information about the +block length (the sample_count parameter of LV2_Descriptor::run) and port +buffer sizes, as well as several features which can be used to restrict the +block length. + +This extension defines features and properties but has no special purpose +API of its own. The host provides all the relevant information to the plugin +as [options](options.html). + +To require restrictions on the block length, plugins can require additional +features: bufsz:boundedBlockLength, bufsz:powerOf2BlockLength, and +bufsz:fixedBlockLength. These features are data-only, that is they merely +indicate a restriction and do not carry any data or API. + +"""^^lv2:Markdown . + +bufsz:boundedBlockLength + lv2:documentation """ + +A feature that indicates the host will provide both the bufsz:minBlockLength +and bufsz:maxBlockLength options to the plugin. Plugins that copy data from +audio inputs can require this feature to ensure they know how much space is +required for auxiliary buffers. Note the minimum may be zero, this feature is +mainly useful to ensure a maximum is available. + +All hosts SHOULD support this feature, since it is simple to support and +necessary for any plugins that may need to copy the input. + +"""^^lv2:Markdown . + +bufsz:fixedBlockLength + lv2:documentation """ + +A feature that indicates the host will always call LV2_Descriptor::run() with +the same value for sample_count. This length MUST be provided as the value of +both the bufsz:minBlockLength and bufsz:maxBlockLength options. + +Note that requiring this feature may severely limit the number of hosts capable +of running the plugin. + +"""^^lv2:Markdown . + +bufsz:powerOf2BlockLength + lv2:documentation """ + +A feature that indicates the host will always call LV2_Descriptor::run() with a +power of two sample_count. Note that this feature does not guarantee the value +is the same each call, to guarantee a fixed power of two block length plugins +must require both this feature and bufsz:fixedBlockLength. + +Note that requiring this feature may severely limit the number of hosts capable +of running the plugin. + +"""^^lv2:Markdown . + +bufsz:coarseBlockLength + lv2:documentation """ + +A feature that indicates the plugin prefers coarse, regular block lengths. For +example, plugins that do not implement sample-accurate control use this feature +to indicate that the host should not split the run cycle because controls have +changed. + +Note that this feature is merely a hint, and does not guarantee a fixed block +length. The run cycle may be split for other reasons, and the blocksize itself +may change anytime. + +"""^^lv2:Markdown . + +bufsz:maxBlockLength + lv2:documentation """ + +The maximum block length the host will ever request the plugin to process at +once, that is, the maximum `sample_count` parameter that will ever be passed to +LV2_Descriptor::run(). + +"""^^lv2:Markdown . + +bufsz:minBlockLength + lv2:documentation """ + +The minimum block length the host will ever request the plugin to process at +once, that is, the minimum `sample_count` parameter that will ever be passed to +LV2_Descriptor::run(). + +"""^^lv2:Markdown . + +bufsz:nominalBlockLength + lv2:documentation """ + +The typical block length the host will request the plugin to process at once, +that is, the typical `sample_count` parameter that will be passed to +LV2_Descriptor::run(). This will usually be equivalent, or close to, the +maximum block length, but there are no strong guarantees about this value +whatsoever. Plugins may use this length for optimization purposes, but MUST +NOT assume the host will always process blocks of this length. In particular, +the host MAY process longer blocks. + +"""^^lv2:Markdown . + +bufsz:sequenceSize + lv2:documentation """ + +This should be provided as an option by hosts that support event ports +(including but not limited to MIDI), so plugins have the ability to allocate +auxiliary buffers large enough to copy the input. + +"""^^lv2:Markdown . + diff --git a/lv2/buf-size.lv2/buf-size.ttl b/lv2/buf-size.lv2/buf-size.ttl new file mode 100644 index 0000000..4f6bd52 --- /dev/null +++ b/lv2/buf-size.lv2/buf-size.ttl @@ -0,0 +1,68 @@ +@prefix bufsz: <http://lv2plug.in/ns/ext/buf-size#> . +@prefix lv2: <http://lv2plug.in/ns/lv2core#> . +@prefix opts: <http://lv2plug.in/ns/ext/options#> . +@prefix owl: <http://www.w3.org/2002/07/owl#> . +@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . +@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . +@prefix xsd: <http://www.w3.org/2001/XMLSchema#> . + +<http://lv2plug.in/ns/ext/buf-size> + a owl:Ontology ; + rdfs:label "LV2 Buf Size" ; + rdfs:comment "Access to, and restrictions on, buffer sizes." ; + rdfs:seeAlso <buf-size.meta.ttl> ; + owl:imports <http://lv2plug.in/ns/lv2core> , + <http://lv2plug.in/ns/ext/options> . + +bufsz:boundedBlockLength + a lv2:Feature ; + rdfs:label "bounded block length" ; + rdfs:comment "Block length has lower and upper bounds." . + +bufsz:fixedBlockLength + a lv2:Feature ; + rdfs:label "fixed block length" ; + rdfs:comment "Block length never changes." . + +bufsz:powerOf2BlockLength + a lv2:Feature ; + rdfs:label "power of 2 block length" ; + rdfs:comment "Block length is a power of 2." . + +bufsz:coarseBlockLength + a lv2:Feature ; + rdfs:label "coarse block length" ; + rdfs:comment "Plugin prefers coarse block length without buffer splitting." . + +bufsz:maxBlockLength + a rdf:Property , + owl:DatatypeProperty , + opts:Option ; + rdfs:label "maximum block length" ; + rdfs:comment "Block length has an upper bound." ; + rdfs:range xsd:nonNegativeInteger . + +bufsz:minBlockLength + a rdf:Property , + owl:DatatypeProperty , + opts:Option ; + rdfs:label "minimum block length" ; + rdfs:comment "Block length has a lower bound." ; + rdfs:range xsd:nonNegativeInteger . + +bufsz:nominalBlockLength + a rdf:Property , + owl:DatatypeProperty , + opts:Option ; + rdfs:label "nominal block length" ; + rdfs:comment "Typical block length that will most often be processed." ; + rdfs:range xsd:nonNegativeInteger . + +bufsz:sequenceSize + a rdf:Property , + owl:DatatypeProperty , + opts:Option ; + rdfs:label "sequence size" ; + rdfs:comment "The maximum size of a sequence, in bytes." ; + rdfs:range xsd:nonNegativeInteger . + diff --git a/lv2/buf-size.lv2/manifest.ttl b/lv2/buf-size.lv2/manifest.ttl new file mode 100644 index 0000000..d242f97 --- /dev/null +++ b/lv2/buf-size.lv2/manifest.ttl @@ -0,0 +1,9 @@ +@prefix lv2: <http://lv2plug.in/ns/lv2core#> . +@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . + +<http://lv2plug.in/ns/ext/buf-size> + a lv2:Specification ; + lv2:minorVersion 1 ; + lv2:microVersion 4 ; + rdfs:seeAlso <buf-size.ttl> . + |