Re-implement URIMap to tolerate broken plugins that use the wrong context to
[ardour.git] / libs / ardour / ardour / uri_map.h
1 /*
2     Copyright (C) 2009-2011 Paul Davis
3     Author: David Robillard
4
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13     GNU General Public License for more details.
14
15     You should have received a copy of the GNU General Public License
16     along with this program; if not, write to the Free Software
17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #ifndef __ardour_uri_map_h__
21 #define __ardour_uri_map_h__
22
23 #include <map>
24
25 #include <boost/utility.hpp>
26
27 #include "lv2.h"
28 #include "lv2/lv2plug.in/ns/ext/uri-map/uri-map.h"
29 #include "lv2/lv2plug.in/ns/ext/urid/urid.h"
30
31 namespace ARDOUR {
32
33 /** Implementation of the LV2 uri-map and urid extensions.
34  *
35  * This just uses a pair of std::map and is not so great in the space overhead
36  * department, but it's fast enough and not really performance critical anyway.
37  */
38 class URIMap : public boost::noncopyable {
39 public:
40         URIMap();
41
42         LV2_Feature* uri_map_feature()    { return &_uri_map_feature; }
43         LV2_Feature* urid_map_feature()   { return &_urid_map_feature; }
44         LV2_Feature* urid_unmap_feature() { return &_urid_unmap_feature; }
45
46         LV2_URID_Map*   urid_map()   { return &_urid_map_feature_data; }
47         LV2_URID_Unmap* urid_unmap() { return &_urid_unmap_feature_data; }
48
49         uint32_t    uri_to_id(const char* uri);
50         const char* id_to_uri(uint32_t id) const;
51
52 private:
53         typedef std::map<const std::string, uint32_t> Map;
54         typedef std::map<uint32_t, const std::string> Unmap;
55
56         Map   _map;
57         Unmap _unmap;
58
59         LV2_Feature         _uri_map_feature;
60         LV2_URI_Map_Feature _uri_map_feature_data;
61         LV2_Feature         _urid_map_feature;
62         LV2_URID_Map        _urid_map_feature_data;
63         LV2_Feature         _urid_unmap_feature;
64         LV2_URID_Unmap      _urid_unmap_feature_data;
65 };
66
67 } // namespace ARDOUR
68
69 #endif // __ardour_uri_map_h__