Correctly implement LV2 event URI mapping (event URI context is restricted to uint16_t).
[ardour.git] / libs / ardour / ardour / uri_map.h
1 /*
2     Copyright (C) 2009 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
21 #ifndef __ardour_uri_map_h__
22 #define __ardour_uri_map_h__
23
24 #include <map>
25 #include <string>
26
27 #include <boost/utility.hpp>
28
29 #include "lv2.h"
30 #include "lv2ext/lv2_uri_map.h"
31 #include "lv2ext/lv2_uri_unmap.h"
32
33 namespace ARDOUR {
34
35
36 /** Implementation of the LV2 URI Map extension
37  */
38 class URIMap : public boost::noncopyable {
39 public:
40         URIMap();
41
42         LV2_Feature* feature() { return &uri_map_feature; }
43
44         uint32_t uri_to_id(const char* map,
45                            const char* uri);
46
47         const char* id_to_uri(const char* map,
48                               uint32_t id);
49
50 private:
51         static uint32_t uri_map_uri_to_id(LV2_URI_Map_Callback_Data callback_data,
52                                           const char*               map,
53                                           const char*               uri);
54
55         static const char* uri_unmap_id_to_uri(LV2_URI_Map_Callback_Data callback_data,
56                                                const char*               map,
57                                                const uint32_t            id);
58
59         typedef std::map<uint16_t, uint32_t> EventToGlobal;
60         typedef std::map<uint32_t, uint16_t> GlobalToEvent;
61
62         EventToGlobal _event_to_global;
63         GlobalToEvent _global_to_event;
64
65         LV2_Feature           uri_map_feature;
66         LV2_URI_Map_Feature   uri_map_feature_data;
67         LV2_Feature           uri_unmap_feature;
68         LV2_URI_Unmap_Feature uri_unmap_feature_data;
69 };
70
71
72 } // namespace ARDOUR
73
74 #endif // __ardour_uri_map_h__