@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 lv2:Specification ;
	rdfs:seeAlso <buf-size.h> ,
		<lv2-buf-size.doap.ttl> ;
	lv2:documentation """
<p>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.</p>

<p>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 <a href="options.html#options">options</a>.</p>

<p>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.</p>
""" .

bufsz:boundedBlockLength
	a lv2:Feature ;
	lv2:documentation """
<p>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.</p>

<p>All hosts SHOULD support this feature, since it is simple to support and
necessary for any plugins that may need to copy the input.</p>
""" .

bufsz:fixedBlockLength
	a lv2:Feature ;
	lv2:documentation """
<p>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.</p>

<p>Note that requiring this feature may severely limit the number of hosts
capable of running the plugin.</p>
""" .

bufsz:powerOf2BlockLength
	a lv2:Feature ;
	lv2:documentation """
<p>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.</p>

<p>Note that requiring this feature may severely limit the number of hosts
capable of running the plugin.</p>
""" .

bufsz:coarseBlockLength
	a lv2:Feature ;
	rdfs:label "coarse block length" ;
	lv2:documentation """
<p>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.</p>

<p>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.</p>
""" .

bufsz:maxBlockLength
	a rdf:Property ,
		owl:DatatypeProperty ,
		opts:Option ;
	rdfs:label "maximum block length" ;
	rdfs:range xsd:nonNegativeInteger ;
	lv2:documentation """
<p>The maximum block length the host will ever request the plugin to process at
once, that is, the maximum <code>sample_count</code> parameter that will ever
be passed to LV2_Descriptor::run().</p>
""" .

bufsz:minBlockLength
	a rdf:Property ,
		owl:DatatypeProperty ,
		opts:Option ;
	rdfs:label "minimum block length" ;
	rdfs:range xsd:nonNegativeInteger ;
	lv2:documentation """
<p>The minimum block length the host will ever request the plugin to process at
once, that is, the minimum <code>sample_count</code> parameter that will ever
be passed to LV2_Descriptor::run().</p>
""" .

bufsz:nominalBlockLength
	a rdf:Property ,
		owl:DatatypeProperty ,
		opts:Option ;
	rdfs:label "nominal block length" ;
	rdfs:range xsd:nonNegativeInteger ;
	lv2:documentation """
<p>The typical block length the host will request the plugin to process at
once, that is, the typical <code>sample_count</code> 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.</p>
""" .

bufsz:sequenceSize
	a rdf:Property ,
		owl:DatatypeProperty ,
		opts:Option ;
	rdfs:label "sequence size" ;
	rdfs:range xsd:nonNegativeInteger ;
	lv2:documentation """
<p>The maximum size of a sequence, in bytes.  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.</p> """ .
