Lay out repository structure to match include and URI structure.

Treat lv2core like all the other specifications in gendoc.py.

6 files changed, 667 insertions, 0 deletions

diff --git a/ns/ext/pui/ext.pc.in b/ns/ext/pui/ext.pc.in
new file mode 120000
index 0000000..1cdad2a
--- /dev/null
+++ b/ns/ext/pui/ext.pc.in
@@ -0,0 +1 @@
+../../../ext.pc.in
\ No newline at end of file
diff --git a/ns/ext/pui/manifest.ttl b/ns/ext/pui/manifest.ttl
new file mode 100644
index 0000000..1229118
--- /dev/null
+++ b/ns/ext/pui/manifest.ttl
@@ -0,0 +1,8 @@
+@prefix lv2:  <http://lv2plug.in/ns/lv2core#>.
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
+
+<http://lv2plug.in/ns/ext/pui>
+	a lv2:Specification;
+	lv2:minorVersion 0;
+	lv2:microVersion 1;
+	rdfs:seeAlso <pui.ttl>.
diff --git a/ns/ext/pui/pui.h b/ns/ext/pui/pui.h
new file mode 100644
index 0000000..caa7deb
--- /dev/null
+++ b/ns/ext/pui/pui.h
@@ -0,0 +1,374 @@
+/************************************************************************
+ *
+ * Plugin UI extension for LV2
+ *
+ * Copyright (C) 2006-2011 Lars Luthman <mail@larsluthman.net>
+ *
+ * Based on lv2.h, which was
+ *
+ * Copyright (C) 2000-2002 Richard W.E. Furse, Paul Barton-Davis,
+ *                         Stefan Westerfeld
+ * Copyright (C) 2006 Steve Harris, David Robillard.
+ *
+ * This header is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License,
+ * or (at your option) any later version.
+ *
+ * This header is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+ * USA.
+ *
+ ***********************************************************************/
+
+/**
+   @file pui.h C API for the LV2 UI extension <http://lv2plug.in/ns/ext/pui>.
+
+   This file specifies a C API for communication between an LV2 host and an
+   LV2 UI. The interface is similar to the one used for actual LV2 plugins.
+
+   The entry point is the function lv2ui_descriptor().
+*/
+
+#ifndef LV2_PUI_H
+#define LV2_PUI_H
+
+#include <lv2.h>
+
+/** The URI of this extension (note this is not the same as the prefix). */
+#define LV2_PUI_URI "http://lv2plug.in/ns/ext/pui"
+
+/** The numerical ID returned by LV2_PUI_Host_Descriptor::port_index() for
+    invalid port symbols. */
+#define LV2_PUI_INVALID_PORT_INDEX ((uint32_t)-1)
+
+/** The full URI for the pui:floatControl PortProtocol. */
+#define LV2_PUI_FLOAT_CONTROL_URI "http://lv2plug.in/ns/ext/pui#floatControl"
+
+/** The full URI for the pui:floatPeakRMS PortProtocol. */
+#define LV2_PUI_FLOAT_PEAK_RMS_URI "http://lv2plug.in/ns/ext/pui#floatPeakRMS"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+   A data type that is used to pass peak and RMS values for a period of
+   audio data at an input or output port to an UI, using port_event. See the
+   documentation for pui:floatPeakRMS for details about how and when this
+   should be done.
+*/
+typedef struct _LV2_PUI_Peak_RMS_Data {
+
+	/**
+	   The start of the measurement period. This is just a running counter that
+	   must not be interpreted as any sort of global frame position. It should
+	   only be interpreted relative to the starts of other measurement periods
+	   in port_event() calls to the same plugin instance.
+
+	   This counter is allowed to overflow, in which case it should just wrap
+	   around.
+	*/
+	uint32_t period_start;
+
+	/**
+	   The size of the measurement period, in the same units as period_start.
+	*/
+	uint32_t period_size;
+
+	/**
+	   The peak value for the measurement period. This should be the maximal
+	   value for abs(sample) over all the samples in the period.
+	*/
+	float peak;
+
+	/**
+	   The RMS value for the measurement period. This should be the root mean
+	   square value of the samples in the period, equivalent to
+	   sqrt((pow(sample1, 2) + pow(sample2, 2) + ... + pow(sampleN, 2)) / N)
+	   where N is period_size.
+	*/
+	float rms;
+
+} LV2_PUI_Peak_RMS_Data;
+
+/**
+   A pointer to a widget or other type of UI.
+   The actual type is defined by the type of the UI defined in the RDF data.
+   All the functionality provided by this extension is toolkit independent, the
+   host only needs to pass the necessary callbacks and display the widget, if
+   possible. Plugins may have several UIs, in various toolkits.
+*/
+typedef void* LV2_PUI_Widget;
+
+/**
+   Handle for a particular instance of a UI.
+   It is valid to compare this to NULL (0 for C++) but otherwise the host MUST
+   NOT attempt to interpret it. The UI may use it to reference internal
+   instance data.
+*/
+typedef void* LV2_PUI_Handle;
+
+/**
+   Handle for host functions and data provided to a UI.
+   An object of this type is passed to the UI's instantiate() function, and the
+   UI must in turn pass it as the first parameter to the callbacks in
+   LV2_PUI_Host_Descriptor. The host may use it to reference internal data, such
+   as the plugin instance that the UI is associated with. The UI MUST NOT
+   interpret the value of an LV2_PUI_Host_Handle in any way.
+*/
+typedef void* LV2_PUI_Host_Handle;
+
+/**
+   Host-provided functions that the UI can use to control the plugin instance.
+
+   A pointer to an object of this type is passed to the lv2ui_descriptor()
+   function.
+
+   The host MUST provide non-NULL values for all the function pointers.
+*/
+typedef struct _LV2_PUI_Host_Descriptor {
+
+	/**
+	   Send data to one of the plugin's input ports.
+
+	   The @c buffer parameter MUST point to a block of data @c buffer_size
+	   bytes large. The contents of this buffer and what the host should do
+	   with it depends on the value of the @c port_protocol parameter.
+
+	   The @c port_protocol parameter MUST be a numeric ID for a
+	   pui:PortProtocol. Numeric IDs for PortProtocols are retrieved using the
+	   port_protocol_id() function.
+
+	   The @c buffer is only valid during the time of this function call, so if
+	   the host wants to keep it for later use it has to copy the contents to an
+	   internal buffer.
+
+	   @param host_handle The @c host_handle that was passed to the UI's
+	   instantiate() function.
+	   @param port_index The index of the port that the data should be written
+	   to, as returned by port_index().
+	   @param buffer_size The size of the data pointed to by @c buffer, in
+	   bytes.
+	   @param port_protocol The numeric ID of the Port Protocol to use,
+	   as returned by port_protocol_id().
+	*/
+	void (*write_port)(LV2_PUI_Host_Handle host_handle,
+	                   uint32_t            port_index,
+	                   uint32_t            buffer_size,
+	                   uint32_t            port_protocol,
+	                   void const*         buffer);
+
+	/**
+	   Return the numerical index for a port.
+	   This index is used when writing data to ports using write_port() and whe
+	   receiving data using port_event(). If @c port_symbol is not a valid port
+	   symbol for @c plugin the host it MUST return
+	   LV2_PUI_INVALID_PORT_INDEX. For performance reasons it may be a good idea
+	   to cache port indices in the UI at instantiation time.
+
+	   @param host_handle The LV2_PUI_Host_Handle that was passed to the UI's
+	   instantiate() function.
+	   @param port_symbol The port's symbol, as defined in the RDF data for
+	   the plugin.
+	*/
+	uint32_t (*port_index)(LV2_PUI_Host_Handle host_handle,
+	                       char const*         port_symbol);
+
+	/**
+	   Subscribe to updates for a port.
+	   This means that the host will call the UI's port_event() function when
+	   the port value changes (as defined by the PortProtocol).
+
+	   Calling this function with the same @c port_index and @c port_protocol
+	   as an already active subscription has no effect.
+
+	   @param host_handle The @c host_handle that was passed to the UI's
+	   instantiate() function.
+	   @param port_index The index of the port, as returned by port_index().
+	   @param port_protocol The numeric ID of the PortProtocol, as
+	   returned by port_protocol_id().
+	*/
+	void (*subscribe_to_port)(LV2_PUI_Host_Handle       host_handle,
+	                          uint32_t                  port_index,
+	                          uint32_t                  port_protocol,
+	                          const LV2_Feature* const* features);
+
+	/**
+	   Unsubscribe from updates for a port.
+	   This means that the host will cease calling calling port_event() when
+	   the port value changes.
+
+	   Calling this function with a @c port_index and @c port_protocol that
+	   does not refer to an active port subscription has no effect.
+
+	   @param host_handle The @c host_handle that was passed to the UI's
+	   instantiate() function.
+	   @param port_index The index of the port, as returned by port_index().
+	   @param port_protocol The numeric ID of the PortProtocol, as
+	   returned by port_protocol_id().
+	*/
+	void (*unsubscribe_from_port)(LV2_PUI_Host_Handle       host_handle,
+	                              uint32_t                  port_index,
+	                              uint32_t                  port_protocol,
+	                              const LV2_Feature* const* features);
+
+
+} LV2_PUI_Host_Descriptor;
+
+/**
+   This struct contains the implementation of an UI. A pointer to an
+   object of this type is returned by the lv2ui_descriptor() function.
+*/
+typedef struct _LV2_PUI_Descriptor {
+
+	/**
+	   The URI for this UI (not for the plugin it controls).
+	*/
+	char const* URI;
+
+	/**
+	   Create a new UI object and return a handle to it. This function works
+	   similarly to the instantiate() member in LV2_Descriptor.
+
+	   @param descriptor The descriptor for the UI to instantiate.
+
+	   @param plugin_uri The URI of the plugin that this UI will control.
+
+	   @param bundle_path The path to the bundle containing the RDF data that
+	   references this shared object file, with trailing separator (e.g. '/').
+
+	   @param host_descriptor A pointer to an object that contains function
+	   pointers that the UI instance should use to control the plugin
+	   instance. This pointer MUST be valid until cleanup() is called for this
+	   UI instance.
+
+	   @param host_handle A handle that the host may use to reference internal
+	   data. It MUST be passed as the first parameter to the function
+	   pointers in @c host_descriptor, and MUST NOT be interpreted in any other
+	   way by the UI.
+
+	   @param features A NULL-terminated array of LV2_Feature pointers. The
+	   host must pass all feature URIs that it and the UI supports and any
+	   additional data, just like in the LV2 plugin instantiate()
+	   function. Note that UI features and plugin features are NOT necessarily
+	   the same; @c features will probably not be the same array as the one the
+	   plugin host passes to a plugin.
+	*/
+	LV2_PUI_Handle (*instantiate)(
+		struct _LV2_PUI_Descriptor const* descriptor,
+		char const*                       plugin_uri,
+		char const*                       bundle_path,
+		LV2_PUI_Host_Descriptor const*    host_descriptor,
+		LV2_PUI_Host_Handle               host_handle,
+		LV2_Feature const* const*         features);
+
+	/**
+	   Return the widget pointer for the UI object.
+	   This MUST return the same value during the entire lifetime of the UI
+	   object.
+	*/
+	LV2_PUI_Widget (*get_widget)(LV2_PUI_Handle ui);
+
+	/**
+	   Destroy the UI object and the associated widget.
+	   The host must not try to access the widget after calling this function.
+	*/
+	void (*cleanup)(LV2_PUI_Handle ui);
+
+	/**
+	   Notify the UI that something has happened to a subscribed port.
+
+	   This is called by the host when something happens at a plugin port that
+	   has been subscribed to using
+	   LV2_PUI_Host_Descriptor::add_port_subscription().
+
+	   The @c buffer is only valid during the time of this function call, so if
+	   the UI wants to keep it for later use it has to copy the contents to an
+	   internal buffer.
+
+	   @param ui A handle for the UI object.
+	   @param port_index The index of the port that has changed, as returned by
+	   LV2_PUI_Host_Descriptor::port_index().
+	   @param buffer_size The size of the data buffer in bytes.
+	   @param port_protocol The format of the data buffer, as returned by
+	   LV2_PUI_Host_Descriptor::port_protocol_id().
+	   @param buffer A pointer to the data buffer.
+	*/
+	void (*port_event)(LV2_PUI_Handle ui,
+	                   uint32_t       port_index,
+	                   uint32_t       buffer_size,
+	                   uint32_t       port_protocol,
+	                   void const*    buffer);
+
+	/**
+	   Return a data structure associated with an extension URI.
+
+	   This facility can be used by extensions to extend the LV2_PUI_Descriptor
+	   API. This function adheres to the same rules as
+	   LV2_Descriptor::extension_data, except it applies to UIs rather than
+	   plugins.
+	*/
+	void const* (*extension_data)(char const*  uri);
+
+} LV2_PUI_Descriptor;
+
+typedef void* LV2_PUI_Lib_Data;
+
+/**
+   Descriptor for a plugin UI library.
+
+   Each plugin UI shared library has exactly one of these objects, accessed
+   via the lv2_pui_lib_descriptor() function in that library.
+*/
+typedef struct {
+	/**
+	   Opaque library data which must be passed as the first parameter to
+	   all the methods of this struct.
+	*/
+	LV2_PUI_Lib_Data lib_data;
+
+	void (*cleanup)(LV2_PUI_Lib_Data lib_data);
+
+	/**
+	   Prototype for UI accessor function.
+
+	   This function follows the same rules as lv2_descriptor(), except it
+	   applies to UIs rather than plugins.
+	*/
+	LV2_PUI_Descriptor const* (*pui_descriptor)(LV2_PUI_Lib_Data lib_data,
+	                                            uint32_t         index);
+
+} LV2_PUI_Lib_Descriptor;
+
+/**
+   Prototype for UI library accessor function.
+
+   This is the entry point for a plugin UI library.  Hosts load this symbol
+   from the library and call this function to obtain a library descriptor which
+   can be used to access all the UIs contained in this library.  The returned
+   object must not be destroyed (with LV2_PUI_Lib_Descriptor::cleanup()) until
+   all UIs loaded from that library have been destroyed.
+*/
+LV2_PUI_Lib_Descriptor const* lv2_pui_lib_descriptor(
+	const char*               bundle_path,
+	LV2_Feature const* const* features);
+
+/**
+   Type of the lv2_pui_lib_descriptor() function in a UI library.
+*/
+typedef LV2_PUI_Lib_Descriptor const* (*LV2_PUI_Lib_Descriptor_Func)(
+	const char*               bundle_path,
+	LV2_Feature const* const* features);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LV2_PUI_H */
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:     &lt;http://lv2plug.in/ns/ext/pui#&gt; .
+&lt;http://example.org/my-ui&gt;  a             pui:Gtk2UI ;
+                            lv2:appliesTo &lt;http://example.org/my-plugin&gt; ;
+                            pui:binary     &lt;my-ui.so&gt; .
+</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>
+""" .
diff --git a/ns/ext/pui/waf b/ns/ext/pui/waf
new file mode 120000
index 0000000..917d5c5
--- /dev/null
+++ b/ns/ext/pui/waf
@@ -0,0 +1 @@
+../../../waf
\ No newline at end of file
diff --git a/ns/ext/pui/wscript b/ns/ext/pui/wscript
new file mode 120000
index 0000000..cf8cbae
--- /dev/null
+++ b/ns/ext/pui/wscript
@@ -0,0 +1 @@
+../../../ext.wscript
\ No newline at end of file