1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
2
3 /*
4 Vamp
5
6 An API for audio analysis and feature extraction plugins.
7
8 Centre for Digital Music, Queen Mary, University of London.
9 Copyright 2006-2015 Chris Cannam and QMUL.
10
11 Permission is hereby granted, free of charge, to any person
12 obtaining a copy of this software and associated documentation
13 files (the "Software"), to deal in the Software without
14 restriction, including without limitation the rights to use, copy,
15 modify, merge, publish, distribute, sublicense, and/or sell copies
16 of the Software, and to permit persons to whom the Software is
17 furnished to do so, subject to the following conditions:
18
19 The above copyright notice and this permission notice shall be
20 included in all copies or substantial portions of the Software.
21
22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
26 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
27 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29
30 Except as contained in this notice, the names of the Centre for
31 Digital Music; Queen Mary, University of London; and Chris Cannam
32 shall not be used in advertising or otherwise to promote the sale,
33 use or other dealings in this Software without prior written
34 authorization.
35 */
36
37 #include <vamp-hostsdk/host-c.h>
38
39 #include "Files.h"
40
41 #include <map>
42 #include <iostream>
43
44 #include <cstring>
45
46 using namespace std;
47
48 static vector<string> files;
49 static map<string, const char *> cnames;
50 static bool haveFiles = false;
51
52 struct vhLibrary_t {
vhLibrary_tvhLibrary_t53 vhLibrary_t(void *h, VampGetPluginDescriptorFunction f)
54 : handle(h), func(f), nplugins(0) { }
55 void *handle;
56 VampGetPluginDescriptorFunction func;
57 int nplugins;
58 };
59
initFilenames()60 static void initFilenames()
61 {
62 if (!haveFiles) {
63 files = Files::listLibraryFiles();
64 for (size_t i = 0; i < files.size(); ++i) {
65 cnames[files[i]] = strdup(Files::lcBasename(files[i]).c_str());
66 }
67 haveFiles = true;
68 }
69 }
70
vhGetLibraryCount()71 int vhGetLibraryCount()
72 {
73 initFilenames();
74 return int(files.size());
75 }
76
vhGetLibraryName(int index)77 const char *vhGetLibraryName(int index)
78 {
79 initFilenames();
80 if (index >= 0 && index < int(files.size())) {
81 return cnames[files[index]];
82 }
83 else return 0;
84 }
85
vhGetLibraryIndex(const char * name)86 int vhGetLibraryIndex(const char *name)
87 {
88 for (size_t i = 0; i < files.size(); ++i) {
89 if (Files::lcBasename(name) == Files::lcBasename(files[i])) {
90 return i;
91 }
92 }
93 return -1;
94 }
95
vhLoadLibrary(int index)96 vhLibrary vhLoadLibrary(int index)
97 {
98 initFilenames();
99 if (index < 0 || index >= int(files.size())) {
100 return 0;
101 }
102
103 string fullPath = files[index];
104 void *lib = Files::loadLibrary(fullPath);
105
106 if (!lib) return 0;
107
108 VampGetPluginDescriptorFunction func =
109 (VampGetPluginDescriptorFunction)Files::lookupInLibrary
110 (lib, "vampGetPluginDescriptor");
111 if (!func) {
112 cerr << "vhLoadLibrary: No vampGetPluginDescriptor function found in library \""
113 << fullPath << "\"" << endl;
114 Files::unloadLibrary(lib);
115 return 0;
116 }
117
118 vhLibrary_t *vhl = new vhLibrary_t(lib, func);
119 while (vhl->func(VAMP_API_VERSION, vhl->nplugins)) {
120 ++vhl->nplugins;
121 }
122 return vhl;
123 }
124
vhGetPluginCount(vhLibrary library)125 int vhGetPluginCount(vhLibrary library)
126 {
127 vhLibrary_t *vhl = static_cast<vhLibrary_t *>(library);
128 if (vhl) return vhl->nplugins;
129 else return 0;
130 }
131
vhGetPluginDescriptor(vhLibrary library,int plugin)132 const VampPluginDescriptor *vhGetPluginDescriptor(vhLibrary library,
133 int plugin)
134 {
135 vhLibrary_t *vhl = static_cast<vhLibrary_t *>(library);
136 if (vhl && plugin >= 0 && plugin < vhl->nplugins) {
137 return vhl->func(VAMP_API_VERSION, plugin);
138 } else {
139 return 0;
140 }
141 }
142
vhUnloadLibrary(vhLibrary library)143 void vhUnloadLibrary(vhLibrary library)
144 {
145 vhLibrary_t *vhl = static_cast<vhLibrary_t *>(library);
146 if (vhl && vhl->handle) {
147 Files::unloadLibrary(vhl->handle);
148 }
149 delete vhl;
150 }
151
152