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diff --git a/ns/ext/pui/pui.ttl b/ns/ext/pui/pui.ttl new file mode 100644 index 0000000..c035e56 --- /dev/null +++ b/ns/ext/pui/pui.ttl @@ -0,0 +1,282 @@ +# LV2 Plugin UI Extension +# Copyright (C) 2010-2011 Lars Luthman <mail@larsluthman.net> +# +# Based on lv2.ttl, which is +# Copyright (C) 2006-2008 Steve Harris, David Robillard +# +# This extension should be considered a replacement for the earlier +# in-process UI extension with the URI <http://lv2plug.in/ns/extensions/ui>. +# Hosts and plugins that used that extension should use this one instead. +# The earlier in-process UI extension is not compatible with LV2 revision 3 +# and later and may break in subtle ways. +# +# 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 doap: <http://usefulinc.com/ns/doap#> . +@prefix foaf: <http://xmlns.com/foaf/0.1/> . +@prefix lv2: <http://lv2plug.in/ns/lv2core#>. +@prefix pui: <http://lv2plug.in/ns/ext/pui#>. +@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/pui> + a lv2:Specification ; + doap:license <http://usefulinc.com/doap/licenses/mit> ; + doap:name "LV2 UI" ; + doap:shortdesc "Generic UI interface for LV2 plugins." ; + doap:release [ + doap:revision "0.1" ; + doap:created "2011-03-26" + ] ; + doap:maintainer [ + a foaf:Person ; + foaf:name "Lars Luthman" ; + foaf:mbox <mailto:mail@larsluthman.net> + ] ; + lv2:documentation """ +<p>This extension defines an interface that can be used to create UIs for +plugins. The UIs are code that reside in shared object files in an LV2 +bundle and are referenced in the RDF data using the triples:</p> +<pre class="turtle-code"> +@prefix pui: <http://lv2plug.in/ns/ext/pui#> . +<http://example.org/my-ui> a pui:Gtk2UI ; + lv2:appliesTo <http://example.org/my-plugin> ; + pui:binary <my-ui.so> . +</pre> +<p>... where <code>http://example.org/my-plugin</code> is the URI of the plugin, +<code>http://example.org/my-ui</code> is the URI of the plugin UI and +<code>my-ui.so</code> is the relative URI to the shared object file. While it +is possible to have the plugin UI and the plugin in the same shared object file +it is probably a good idea to keep them separate so that hosts that don't want +UIs don't have to load the UI code.</p> + +<p>A UI MUST specify its class in the RDF data and the class MUST be a proper +subclass of pui:UI, in this case pui:Gtk2UI. The class defines what type the +UI is, e.g. what graphics toolkit it uses. There are no UI classes defined in +this extension, those are specified separately (and anyone can define their +own).</p> + +<p>It's entirely possible to have multiple UIs for the same plugin, or to have +the UI for a plugin in a different bundle from the actual plugin - this way +people other than the plugin author can write plugin UIs independently without +editing the original plugin bundle. It is also possible to have one UI that +works with several different plugins.</p> + +<p>UIs should also be written in such a way that the host may load several +instances of an UI, or different UIs, and use them with the same plugin +instance.</p> + +<p>Note that the process that loads the shared object file containing the UI +code and the process that loads the shared object file containing the actual +plugin implementation do not have to be the same. There are many valid reasons +for having the plugin and the UI in different processes, or even on different +machines. This means that you can <strong>not</strong> use singletons and +global variables and expect them to refer to the same objects in the UI and the +actual plugin. The function callback interface defined in the header pui.h is +all you can expect to work.</p> +""" . + +pui:UI + a rdfs:Class ; + rdfs:subClassOf lv2:Feature ; + rdfs:label "UI" ; + lv2:documentation """ +<p>The class which represents an LV2 plugin UI. +</p> + +<p>To be used by a host a UI MUST have at least the following properties:</p> +<ul> +<li>rdf:type (with object a proper subclass of pui:UI)</li> +<li>doap:name (one without language tag)</li> +<li>lv2:binary (with a shared object file as object)</li> +<li>lv2:appliesTo (with a LV2 plugin as object)</li> +</ul> + +<p>The rdf:type of an UI is used by the host to decide whether it supports the +UI and how to handle the LV2_PUI_Widget object that is returned by the UIs +get_widget() function. For example, a type of pui:Gtk2UI might tell the +host that LV2_PUI_Widget is a pointer to an object of a type defined in the +Gtk+ library. No UI types are defined in this extension, that is intentionally +left for other extensions.</p> + +<p>The doap:name property should be at most a few words in length using title +capitalization, e.g. "Flashy Mixer GUI". Use lv2:documentation for more +detailed descriptions.</p> + +<p>UIs may have optional or required features, specified using lv2:optionalFeature +or lv2:requiredFeature. The same rules apply here as for plugins; a host MUST +pass the LV2_Feature objects for all features it supports to the UI's +instantiate() function, a host SHOULD NOT try to instantiate an UI if it +doesn't support all of its required features, and an UI MUST fail to +instantiate if the host doesn't pass all required features to instantiate(). +</p> + +<p>For details about the C API used to load UIs, see the file pui.h. +</p> +""" . + +pui:PortProtocol + a rdfs:Class ; + rdfs:subClassOf lv2:Feature ; + rdfs:label "Port protocol" ; + lv2:documentation """ +<p>A PortProtocol defines a certain way of communicating port data between UI +and plugin. PortProtocols can be specified in additional extensions, and +those extensions MUST specify: +</p> + +<ol> +<li>Which plugin port types the buffer type is valid for</li> +<li>When the host should call port_event() in LV2_PUI_Descriptor</li> +<li>The format of the data in the buffer passed to port_event()</li> +<li>The format of the data in the buffer passed to write_port()</li> +<li>What happens when the UI calls write_port() in LV2_PUI_Host_Descriptor</li> +<li>What data (if any) should be passed in the LV2_Feature data pointer. </li> +</ol> + +<p>For an example, see pui:floatControl or pui:floatPeakRMS. +</p> + +<p>PortProtocol is a subclass of lv2:Feature, so UIs use lv2:optionalFeature and +lv2:requiredFeature to specify which PortProtocols they want to use. +</p> +""" . + +pui:floatControl + a pui:PortProtocol ; + rdfs:label "Floating point value" ; + lv2:documentation """ +<p>The rules (see pui:PortProtocol) for this port protocol are:</p> +<ol> +<li>This PortProtocol is valid for ports with the type lv2:ControlPort.</li> +<li>The host SHOULD call port_event() as soon as possible when the port value + has changed, but the plugin MUST NOT depend on a call for every change or + the timing of the calls. However, the host MUST do the calls in the same + order that the value changes occur in.</li> +<li>The format of the data in the buffer passed to port_event() is a single + float, and the buffer size is sizeof(float).</li> +<li>Same as 3.</li> +<li>The host SHOULD change the port value as soon as possible when write_port() + is called, but the UI MUST NOT depend on a change for every call or the + timing of the changes. However, the host MUST do the changes in the same + order that the function calls occur in.</li> +<li>The data pointer in the LV2_Feature object for this feature should be + NULL.</li> +</ol> +""" . + +pui:floatPeakRMS + a pui:PortProtocol ; + rdfs:label "Peak and RMS for a period of audio data" ; + lv2:documentation """ +<p>This port protocol defines a way for the host to send continuous peak +and RMS measurements of the audio signal at a certain port to the UI. The +intended use is visualisation, e.g. an animated meter widget that shows +the level of the audio input or output.</p> + +<p>A contiguous sequence of audio samples for which a single peak value +and a single RMS value have been computed is called a <em>measurement +period</em>.</p> + +<p>The rules (see pui:PortProtocol) for this port protocol are:</p> +<ol> +<li>This PortProtocol is valid for ports with the type lv2:AudioPort.</li> +<li>The host SHOULD call port_event() at regular intervals. The measurement + periods used for calls to port_event() for the same port SHOULD be + contiguous (i.e. the measurement period for one call should begin right + after the end of the measurement period for the previous call ends) unless + the UI has removed and re-added the port subscription between those calls. + However, UIs MUST NOT depend on either the regularity of the calls or the + contiguity of the measurement periods; hosts may change the call rate + or skip calls for performance or other reasons. Measurement periods for + different calls to port_event() for the same port MUST NOT overlap.</li> +<li>The format of the data in the buffer passed to port_event() is a single + LV2_PUI_Peak_RMS_Data object, and the buffer size is + sizeof(LV2_PUI_Peak_RMS_Data).</li> +<li>The UI MUST NOT call write_port() with the ID for this port protocol as + the port_protocol parameter.</li> +<li>The host MUST ignore any write_port() calls with the ID for this port + protocol as the port_protocol parameter.</li> +<li>The data pointer in the LV2_Feature object for this feature should be + NULL.</li> +</ol> +""" . + +pui:events + a pui:PortProtocol ; + rdfs:label "Event buffer" ; + lv2:documentation """ +<ol> +<li>This PortProtocol is valid for ports with the type ev:EventPort.</li> +<li>The host MUST call port_event() whenever there is an event in an input port + prior to the plugin instance's run() function is called, and whenever there + is an event in an output port after run() has been called. The UI MUST NOT + depend on the timing of the calls. However, the host MUST do the calls in + the same order that the events occur in. The host is allowed and encouraged + to bundle multiple events into a single port_event() call if it improves + performance.</li> +<li>The data buffer passed to port_event() is an LV2_Event_Buffer, as specified + in the Event extension. The stamp_type MUST be ignored. The frames and + subframes fields of every event in the buffer MUST be ignored. Events with + type 0 (reference counted events) MUST be ignored.</li> +<li>The data buffer passed to write_event() is an LV2_Event_Buffer, as + specified in the Event extension. The stamp_type MUST be ignored. The + frames and subframes fields of every event in the buffer MUST be + ignored. The host MUST NOT pass events with type 0 (references) unless the + UI supports the feature "http://lv2plug.in/ns/ext/event".</li> +<li>The host MUST pass all the events in the buffer to the plugin instance's + event port in the same order, but the plugin and the UI MUST NOT depend on + the timing of the events, or on whether they are all sent to the plugin in + the same run() call or distributed over multiple calls.</li> +<li>The data pointer in the LV2_Feature object for this feature should be + NULL.</li> +</ol> +""" . + +pui:Gtk2UI + a rdfs:Class ; + rdfs:subClassOf pui:UI ; + rdfs:label "Gtk+ UI" ; + lv2:documentation """ +<p>The class which represents a Gtk+ UI. For a successfully created instance of +an UI of this class, the get_widget() function MUST return a pointer to a valid +GtkWidget object compatible with Gtk+ version 2.0. The host MUST ensure that +the Gtk+ library has been initialised and that the Glib main loop is running +before an UI of this type is instantiated.</p> + +<p>Unless otherwise specified by extensions, all function pointers in +LV2_PUI_Descriptor may only be called from the thread that runs the Glib main +loop.</p> +""" . + +pui:noHostResize + a lv2:Feature ; + rdfs:label "No host resize" ; + lv2:documentation """ +<p>This Feature should only be used with UIs.</p> + +<p>When this Feature is active the host SHOULD NOT resize the UI widget to any +other size than its natural size, which the host should be able to determine +via the API of whatever toolkit the UI is implemented in. However, the UI MUST +NOT break if the widget is resized to another size. This Feature can be used +for example when the widget uses a fixed-size pixmap interface.</p> + +<p>The data pointer in the LV2_Feature object for this Feature should be set to +NULL.</p> +""" . |