Correctly implement LV2 event URI mapping (event URI context is restricted to uint16_t).
Implement LV2 URI Unmap extension. git-svn-id: svn://localhost/ardour2/branches/3.0@8139 d708f5d6-7413-0410-9779-e7cbd77b26cf
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@ -23,9 +23,12 @@
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#include <map>
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#include <string>
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#include <boost/utility.hpp>
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#include <slv2/slv2.h>
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#include "lv2.h"
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#include "lv2ext/lv2_uri_map.h"
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#include "lv2ext/lv2_uri_unmap.h"
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namespace ARDOUR {
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@ -41,17 +44,28 @@ public:
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uint32_t uri_to_id(const char* map,
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const char* uri);
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private:
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typedef std::map<std::string, uint32_t> Map;
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const char* id_to_uri(const char* map,
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uint32_t id);
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private:
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static uint32_t uri_map_uri_to_id(LV2_URI_Map_Callback_Data callback_data,
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const char* map,
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const char* uri);
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static const char* uri_unmap_id_to_uri(LV2_URI_Map_Callback_Data callback_data,
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const char* map,
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const uint32_t id);
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typedef std::map<uint16_t, uint32_t> EventToGlobal;
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typedef std::map<uint32_t, uint16_t> GlobalToEvent;
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EventToGlobal _event_to_global;
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GlobalToEvent _global_to_event;
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LV2_Feature uri_map_feature;
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LV2_URI_Map_Feature uri_map_feature_data;
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Map uri_map;
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uint32_t next_uri_id;
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LV2_Feature uri_unmap_feature;
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LV2_URI_Unmap_Feature uri_unmap_feature_data;
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};
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81
libs/ardour/lv2ext/lv2_uri_unmap.h
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81
libs/ardour/lv2ext/lv2_uri_unmap.h
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@ -0,0 +1,81 @@
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/* lv2_uri_unmap.h - C header file for the LV2 URI Unmap extension.
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*
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* Copyright (C) 2010 David Robillard <http://drobilla.net>
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*
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* This header is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This header is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this header; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 01222-1307 USA
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*/
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/** @file
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* C header for the LV2 URI Map extension <http://lv2plug.in/ns/ext/uri-unmap>.
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*/
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#ifndef LV2_URI_UNMAP_H
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#define LV2_URI_UNMAP_H
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#define LV2_URI_UNMAP_URI "http://lv2plug.in/ns/ext/uri-unmap"
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#include <stdint.h>
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/** Opaque pointer to host data. */
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typedef void* LV2_URI_Unmap_Callback_Data;
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/** The data field of the LV2_Feature for the URI Unmap extension.
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*
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* To support this extension the host must pass an LV2_Feature struct to the
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* plugin's instantiate method with URI "http://lv2plug.in/ns/ext/uri-unmap"
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* and data pointed to an instance of this struct.
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*/
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typedef struct {
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/** Opaque pointer to host data.
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*
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* The plugin MUST pass this to any call to functions in this struct.
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* Otherwise, it must not be interpreted in any way.
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*/
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LV2_URI_Unmap_Callback_Data callback_data;
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/** Get the numeric ID of a URI from the host.
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*
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* @param callback_data Must be the callback_data member of this struct.
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* @param map The 'context' used to map this URI.
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* @param id The URI ID to unmap.
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* @return The string form of @a id, or NULL on error.
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*
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* The @a id MUST be a value previously returned from
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* LV2_Uri_Map_Feature.uri_to_id.
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*
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* The returned string is owned by the host and MUST NOT be freed by
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* the plugin or stored for a long period of time (e.g. across run
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* invocations) without copying.
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*
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* This function is referentially transparent - any number of calls with
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* the same arguments is guaranteed to return the same value over the life
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* of a plugin instance (though the same ID may return different values
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* with a different map parameter).
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*
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* This function may be called from any non-realtime thread, possibly
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* concurrently (hosts may simply use a mutex to meet these requirements).
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*/
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const char* (*id_to_uri)(LV2_URI_Unmap_Callback_Data callback_data,
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const char* map,
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uint32_t id);
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} LV2_URI_Unmap_Feature;
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#endif /* LV2_URI_UNMAP_H */
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@ -20,7 +20,14 @@
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#include <cassert>
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#include <iostream>
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#include <stdint.h>
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#include <string.h>
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#include <glib.h>
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#include "pbd/error.h"
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#include "ardour/uri_map.h"
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using namespace std;
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@ -29,12 +36,16 @@ namespace ARDOUR {
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URIMap::URIMap()
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: next_uri_id(1)
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{
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uri_map_feature_data.uri_to_id = &URIMap::uri_map_uri_to_id;
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uri_map_feature_data.callback_data = this;
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uri_map_feature.URI = LV2_URI_MAP_URI;
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uri_map_feature.data = &uri_map_feature_data;
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uri_unmap_feature_data.id_to_uri = &URIMap::uri_unmap_id_to_uri;
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uri_unmap_feature_data.callback_data = this;
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uri_unmap_feature.URI = LV2_URI_UNMAP_URI;
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uri_unmap_feature.data = &uri_unmap_feature_data;
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}
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@ -42,33 +53,64 @@ uint32_t
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URIMap::uri_to_id(const char* map,
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const char* uri)
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{
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return uri_map_uri_to_id(this, map, uri);
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const uint32_t id = static_cast<uint32_t>(g_quark_from_string(uri));
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if (map && !strcmp(map, "http://lv2plug.in/ns/ext/event")) {
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GlobalToEvent::iterator i = _global_to_event.find(id);
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if (i != _global_to_event.end()) {
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return i->second;
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} else {
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if (_global_to_event.size() + 1 > UINT16_MAX) {
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PBD::error << "Event URI " << uri << " ID out of range." << endl;
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return NULL;
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}
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const uint16_t ev_id = _global_to_event.size() + 1;
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assert(_event_to_global.find(ev_id) == _event_to_global.end());
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_global_to_event.insert(make_pair(id, ev_id));
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_event_to_global.insert(make_pair(ev_id, id));
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return ev_id;
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}
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} else {
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return id;
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}
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}
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const char*
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URIMap::id_to_uri(const char* map,
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const uint32_t id)
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{
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if (map && !strcmp(map, "http://lv2plug.in/ns/ext/event")) {
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EventToGlobal::iterator i = _event_to_global.find(id);
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if (i == _event_to_global.end()) {
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PBD::error << "Failed to unmap event URI " << id << endl;
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return NULL;
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}
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return g_quark_to_string(i->second);
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} else {
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return g_quark_to_string(id);
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}
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}
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uint32_t
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URIMap::uri_map_uri_to_id(LV2_URI_Map_Callback_Data callback_data,
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const char* /*map*/,
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const char* map,
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const char* uri)
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{
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// TODO: map ignored, < UINT16_MAX assumed
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URIMap* me = (URIMap*)callback_data;
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uint32_t ret = 0;
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return me->uri_to_id(map, uri);
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Map::iterator i = me->uri_map.find(uri);
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if (i != me->uri_map.end()) {
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ret = i->second;
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} else {
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ret = me->next_uri_id++;
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me->uri_map.insert(make_pair(string(uri), ret));
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}
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/*cout << "URI MAP (" << (map ? (void*)map : NULL)
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<< "): " << uri << " -> " << ret << endl;*/
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assert(ret <= UINT16_MAX);
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return ret;
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const char*
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URIMap::uri_unmap_id_to_uri(LV2_URI_Map_Callback_Data callback_data,
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const char* map,
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uint32_t id)
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{
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URIMap* me = (URIMap*)callback_data;
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return me->id_to_uri(map, id);
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}
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