Add urid extension from Gabriel M. Beddingfield.

3 files changed, 165 insertions, 0 deletions

diff --git a/ext/urid.lv2/manifest.ttl b/ext/urid.lv2/manifest.ttl
new file mode 100644
index 0000000..28b54e2
--- /dev/null
+++ b/ext/urid.lv2/manifest.ttl
@@ -0,0 +1,9 @@
+@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix urid: <http://lv2plug.in/ns/ext/urid#> .
+
+<http://lv2plug.in/ns/ext/urid>
+	a lv2:Specification ;
+	lv2:minorVersion 0 ;
+	lv2:microVersion 1 ;
+	rdfs:seeAlso <urid.ttl> .
diff --git a/ext/urid.lv2/urid.h b/ext/urid.lv2/urid.h
new file mode 100644
index 0000000..cc444b2
--- /dev/null
+++ b/ext/urid.lv2/urid.h
@@ -0,0 +1,99 @@
+/*
+  Copyright 2011 Gabriel M. Beddingfield <gabrbedd@gmail.com>
+  Copyright 2008-2011 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+   @file
+   C header for the LV2 URID extension <http://lv2plug.in/ns/ext/urid>
+*/
+
+#ifndef LV2_URID_H
+#define LV2_URID_H
+
+#define LV2_URID_URI "http://lv2plug.in/ns/ext/urid"
+
+#include <stdint.h>
+
+/**
+   Opaque pointer to host data.
+*/
+typedef void* LV2_URID_Callback_Data;
+
+/**
+   URI mapped to an integer.
+*/
+typedef uint32_t LV2_URID;
+
+/**
+   URID Feature.
+
+   To support this feature the host must pass an LV2_Feature struct to the
+   plugin's instantiate method with URI "http://lv2plug.in/ns/ext/urid#URIMap"
+   and data pointed to an instance of this struct.
+*/
+typedef struct {
+
+	/**
+	   Opaque pointer to host data.
+
+	   The plugin MUST pass this to any call to functions in this struct.
+	   Otherwise, it must not be interpreted in any way.
+	*/
+	LV2_URID_Callback_Data callback_data;
+
+	/**
+	   Get the numeric ID of a URI from the host.
+
+	   If the ID does not already exist, it will be created.
+
+	   @param callback_data Must be the callback_data member of this struct.
+	   @param uri The URI to be mapped to an integer ID.
+
+	   This function is referentially transparent; any number of calls with the
+	   same arguments is guaranteed to return the same value over the life of a
+	   plugin instance.  However, this function is not necessarily very
+	   fast or RT-safe: plugins SHOULD cache any IDs they might need in
+	   performance critical situations.
+
+	   The return value 0 is reserved and indicates that an ID for that URI
+	   could not be created for whatever reason.  However, hosts SHOULD NOT
+	   return 0 from this function in non-exceptional circumstances (i.e. the
+	   URI map SHOULD be dynamic).
+	*/
+	LV2_URID (*map_uri)(LV2_URID_Callback_Data callback_data,
+	                    const char*            uri);
+
+	/**
+	   Get the URI for a given numeric ID from the host.
+
+	   @param callback_data Must be the callback_data member of this struct.
+	   @param id The ID to be mapped back to the URI string.
+
+	   Returns NULL if @c id is not yet mapped.  Otherwise, the corresponding
+	   URI is returned in a canonical form.  This may not be the exact same
+	   string that was originally passed to map_uri(), but it will be an
+	   identical URI according to the URI spec.  A non-NULL return for a given
+	   @c id will always be the same for the life of the plugin.  Plugins that
+	   intend to perform string comparison on unmapped URIs should first
+	   canonicalise URI strings with a call to map_uri() followed by a call to
+	   unmap_uri().
+	*/
+	const char* (*unmap_uri)(LV2_URID_Callback_Data callback_data,
+	                         LV2_URID               urid);
+
+} LV2_URID_Feature;
+
+#endif /* LV2_URID_H */
diff --git a/ext/urid.lv2/urid.ttl b/ext/urid.lv2/urid.ttl
new file mode 100644
index 0000000..f32ed99
--- /dev/null
+++ b/ext/urid.lv2/urid.ttl
@@ -0,0 +1,57 @@
+# LV2 URID Extension
+# Copyright 2011 Gabriel M. Beddingfield <gabrbedd@gmail.com>
+# Copyright 2008-2011 David Robillard <http://drobilla.net>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+@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#> .
+@prefix urid: <http://lv2plug.in/ns/ext/urid#> .
+
+<http://lv2plug.in/ns/ext/urid>
+	a lv2:Specification ;
+	doap:license <http://opensource.org/licenses/isc-license> ;
+	doap:name "LV2 URID" ;
+    doap:release [
+        doap:revision "0.1" ;
+        doap:created "2011-07-20"
+    ] ;
+	doap:maintainer [
+		a foaf:Person ;
+		foaf:name "Gabriel M. Beddingfield" ;
+		foaf:homepage <http://gabe.is-a-geek.org/>
+	] ;
+    lv2:documentation """
+This extension defines a simple mechanism for plugins to map URIs to and from
+integers, usually for performance reasons (e.g. processing events typed by URIs
+in real time).  Typically, plugins map URIs to integers for things they
+"understand" at instantiation time, and store those values for use in the audio
+thread without doing any string comparison.  This allows for the extensibility
+of RDF but with the performance of integers.
+
+This extension is intended as an improved and simpler replacement for the
+<a href="http://lv2plug.in/ns/ext/uri-map">uri-map</a> extension, since the
+<q>map</q> context parameter has been found problematic.
+""" .
+
+urid:URIMap
+    a lv2:Feature ;
+    lv2:documentation """
+An lv2:Feature which provides URI mapping and unmapping capability.  To support
+this feature, the host must pass an LV2_Feature to
+LV2_Descriptor::instantiate with <em>URI</em>
+<q>http://lv2plug.in/ns/ext/urid#URIMap</q> and <em>data</em> pointed to an instance of
+LV2_URID_Feature.
+""" .