From cef9811dac46a9d54dab0f0d82ce5c3ae032fc7c Mon Sep 17 00:00:00 2001 From: David Robillard Date: Mon, 4 Oct 2010 18:21:08 +0000 Subject: Initial import of lv2plug.in universe. --- ext/atom-port.lv2/atom-port.ttl | 127 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 ext/atom-port.lv2/atom-port.ttl (limited to 'ext/atom-port.lv2/atom-port.ttl') diff --git a/ext/atom-port.lv2/atom-port.ttl b/ext/atom-port.lv2/atom-port.ttl new file mode 100644 index 0000000..7533606 --- /dev/null +++ b/ext/atom-port.lv2/atom-port.ttl @@ -0,0 +1,127 @@ +# LV2 Atom Port Extension +# Copyright (C) 2010 David Robillard +# +# Permission is hereby granted, free of charge, to any person obtaining a +# copy of this software and associated documentation files (the "Software"), +# to deal in the Software without restriction, including without limitation +# the rights to use, copy, modify, merge, publish, distribute, sublicense, +# and/or sell copies of the Software, and to permit persons to whom the +# Software is furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included +# in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL +# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR +# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +# OTHER DEALINGS IN THE SOFTWARE. + +@prefix aport: . +@prefix atom: . +@prefix doap: . +@prefix foaf: . +@prefix lv2: . +@prefix rdf: . +@prefix rdfs: . +@prefix xsd: . + + + a lv2:Specification ; + doap:name "LV2 Atom Port" ; + doap:maintainer [ + a foaf:Person ; + foaf:name "David Robillard" ; + foaf:homepage ; + rdfs:seeAlso + ] ; + rdfs:comment """ +This extension describes port types that hold polymorphic values +(atom:Atom). There are +two such port types with equivalent buffer formats but different semantics: +value ports (aport:ValuePort) and message ports (aport:MessagePort). +""" . + + +aport:AtomPort a rdfs:Class ; + rdfs:label "Atom Port" ; + rdfs:subClassOf lv2:Port ; + rdfs:comment """ +A port which contains a polymorphic value, or "atom". +Ports of this type will be connected to a 32-bit aligned atom:Atom (i.e. a uint32_t type, +immediately followed by a uint32_t size, immediately followed by that many +bytes of data). + +This is an abstract port type. A port that is a aport:AtomPort MUST also +have a more descriptive type that is a subClassOf aport:AtomPort which +defines the port's semantics (typically aport:ValuePort or aport:MessagePort). + +Before calling a method on the plugin that writes to an AtomPort output, +the host MUST set the size of the Atom in that output to the amount of +available memory immediately following the Atom header. The plugin MUST +write a valid Atom to that port (leaving it untouched is illegal). If there +is no reasonable value to write to the port, the plugin MUST write null +(the atom with both type and size equal to zero). +""" . + + +#aport:respondsWith a rdf:Property ; +# rdfs:domain aport:MessagePort ; +# rdfs:range lv2:Symbol ; +# rdfs:label "responds with" ; +# rdfs:comment """ +#Indicates that a message port responds to messages via the port with the +#given symbol on the same plugin instance. If +#
input aport:respondsWith output
then after running the plugin with +#a message m in input the host SHOULD interpret the aport: +#in output as the response to m. +#""" . + + +aport:ValuePort a rdfs:Class ; + rdfs:label "Value Port" ; + rdfs:subClassOf aport:AtomPort ; + rdfs:comment """ +An AtomPort that interprets its data as a persistent and time-independent +"value". +
    +
  • If a plugin has fixed input values for all ports, all ValuePort outputs +are also fixed regardless of the number of times the plugin is run.
    • +
  • If a plugin has fixed input values for all ports except a ValuePort, +each value V of that ValuePort corresponds to a single set of outputs +for all ports.
    • +
  • If an aport:ValuePort contains a reference then the blob it refers to is +constant; plugin MUST NOT modify the blob in any way.
    • +
+Value ports can be thought of as purely functional ports: if a plugin +callback has only value ports, then the plugin callback is a pure function. +""" . + + +aport:MessagePort a rdfs:Class ; + rdfs:label "Message Port" ; + rdfs:subClassOf aport:AtomPort ; + rdfs:comment """ +An AtomPort that consumes or executes its value as a "message". The contents +of a MessagePort are considered transient and/or time-dependent, and only +apply for a single run invocation. Unlike a ValuePort, a MessagePort may +be used to manipulate and access internal plugin state. + +Intuitively, a MessagePort contains a "command" or "event" (which is reacted +to), NOT a "value" or "signal" (which is computed with). +""" . + +aport:supports a rdf:Property ; + rdfs:domain lv2:Port ; + rdfs:range atom:AtomType ; + rdfs:label "supports" ; + rdfs:comment """ +Indicates that an atom port supports a certain value type. This is distinct +from the port type - e.g. the port type ValuePort can hold atoms with many +different types. This property is used to describe which atom types +a port ``understands''. +""" . + -- cgit v1.2.1