Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
5aff007d | 3 | * Copyright (C) 2004-2008 Richard Kettlewell |
460b9539 | 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, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
05b75f8d | 21 | #include "disorder-server.h" |
460b9539 | 22 | |
23 | #include <dlfcn.h> | |
460b9539 | 24 | |
25 | /* generic plugin support *****************************************************/ | |
26 | ||
27 | #ifndef SOSUFFIX | |
28 | # define SOSUFFIX ".so" | |
29 | #endif | |
30 | ||
31 | struct plugin { | |
32 | struct plugin *next; | |
33 | void *dlhandle; | |
34 | const char *name; | |
35 | }; | |
36 | ||
37 | static struct plugin *plugins; | |
38 | ||
39 | const struct plugin *open_plugin(const char *name, | |
40 | unsigned flags) { | |
41 | void *h = 0; | |
42 | char *p; | |
43 | int n; | |
44 | struct plugin *pl; | |
45 | ||
46 | for(pl = plugins; pl && strcmp(pl->name, name); pl = pl->next) | |
47 | ; | |
48 | if(pl) return pl; | |
62dc3748 | 49 | /* Search the plugin path */ |
460b9539 | 50 | for(n = 0; n <= config->plugins.n; ++n) { |
51 | byte_xasprintf(&p, "%s/%s" SOSUFFIX, | |
52 | n == config->plugins.n ? pkglibdir : config->plugins.s[n], | |
53 | name); | |
54 | if(access(p, R_OK) == 0) { | |
55 | h = dlopen(p, RTLD_NOW); | |
56 | if(!h) { | |
57 | error(0, "error opening %s: %s", p, dlerror()); | |
58 | continue; | |
59 | } | |
60 | pl = xmalloc(sizeof *pl); | |
61 | pl->dlhandle = h; | |
62 | pl->name = xstrdup(name); | |
63 | pl->next = plugins; | |
64 | plugins = pl; | |
65 | return pl; | |
66 | } | |
67 | } | |
68 | (flags & PLUGIN_FATAL ? fatal : error)(0, "cannot find plugin '%s'", name); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | function_t *get_plugin_function(const struct plugin *pl, | |
73 | const char *symbol) { | |
74 | function_t *f; | |
460b9539 | 75 | |
76 | f = (function_t *)dlsym(pl->dlhandle, symbol); | |
f47f3637 | 77 | if(!f) |
78 | fatal(0, "error looking up function '%s' in '%s': %s", | |
79 | symbol, pl->name, dlerror()); | |
460b9539 | 80 | return f; |
81 | } | |
82 | ||
83 | const void *get_plugin_object(const struct plugin *pl, | |
84 | const char *symbol) { | |
85 | void *o; | |
460b9539 | 86 | |
87 | o = dlsym(pl->dlhandle, symbol); | |
f47f3637 | 88 | if(!o) |
89 | fatal(0, "error looking up object '%s' in '%s': %s", | |
90 | symbol, pl->name, dlerror()); | |
460b9539 | 91 | return o; |
92 | } | |
93 | ||
94 | /* specific plugin interfaces *************************************************/ | |
95 | ||
96 | typedef long tracklength_fn(const char *track, const char *path); | |
97 | ||
62dc3748 RK |
98 | /** Compute the length of a track |
99 | * @param plugin plugin to use, as configured | |
100 | * @param track UTF-8 name of track | |
101 | * @param path file system path or 0 | |
102 | * @return length of track in seconds, 0 for unknown, -1 for error | |
103 | */ | |
104 | long tracklength(const char *plugin, const char *track, const char *path) { | |
105 | tracklength_fn *f = 0; | |
460b9539 | 106 | |
62dc3748 RK |
107 | f = (tracklength_fn *)get_plugin_function(open_plugin(plugin, |
108 | PLUGIN_FATAL), | |
109 | "disorder_tracklength"); | |
460b9539 | 110 | return (*f)(track, path); |
111 | } | |
112 | ||
113 | typedef void scan_fn(const char *root); | |
114 | ||
115 | void scan(const char *module, const char *root) { | |
116 | ((scan_fn *)get_plugin_function(open_plugin(module, PLUGIN_FATAL), | |
117 | "disorder_scan"))(root); | |
118 | } | |
119 | ||
120 | typedef int check_fn(const char *root, const char *path); | |
121 | ||
122 | ||
123 | int check(const char *module, const char *root, const char *path) { | |
124 | return ((check_fn *)get_plugin_function(open_plugin(module, PLUGIN_FATAL), | |
125 | "disorder_check"))(root, path); | |
126 | } | |
127 | ||
128 | typedef void notify_play_fn(const char *track, const char *submitter); | |
129 | ||
130 | void notify_play(const char *track, | |
131 | const char *submitter) { | |
132 | static notify_play_fn *f; | |
133 | ||
134 | if(!f) | |
135 | f = (notify_play_fn *)get_plugin_function(open_plugin("notify", | |
136 | PLUGIN_FATAL), | |
137 | "disorder_notify_play"); | |
138 | (*f)(track, submitter); | |
139 | } | |
140 | ||
141 | typedef void notify_scratch_fn(const char *track, | |
142 | const char *submitter, | |
143 | const char *scratcher, | |
144 | int seconds); | |
145 | ||
146 | void notify_scratch(const char *track, | |
147 | const char *submitter, | |
148 | const char *scratcher, | |
149 | int seconds) { | |
150 | static notify_scratch_fn *f; | |
151 | ||
152 | if(!f) | |
153 | f = (notify_scratch_fn *)get_plugin_function(open_plugin("notify", | |
154 | PLUGIN_FATAL), | |
155 | "disorder_notify_scratch"); | |
156 | (*f)(track, submitter, scratcher, seconds); | |
157 | } | |
158 | ||
159 | typedef void notify_not_scratched_fn(const char *track, | |
160 | const char *submitter); | |
161 | ||
162 | void notify_not_scratched(const char *track, | |
163 | const char *submitter) { | |
164 | static notify_not_scratched_fn *f; | |
165 | ||
166 | if(!f) | |
167 | f = (notify_not_scratched_fn *)get_plugin_function | |
168 | (open_plugin("notify", | |
169 | PLUGIN_FATAL), | |
170 | "disorder_notify_not_scratched"); | |
171 | (*f)(track, submitter); | |
172 | } | |
173 | ||
174 | typedef void notify_queue_fn(const char *track, | |
175 | const char *submitter); | |
176 | ||
177 | void notify_queue(const char *track, | |
178 | const char *submitter) { | |
179 | static notify_queue_fn *f; | |
180 | ||
181 | if(!f) | |
182 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", | |
183 | PLUGIN_FATAL), | |
184 | "disorder_notify_queue"); | |
185 | (*f)(track, submitter); | |
186 | } | |
187 | ||
188 | void notify_queue_remove(const char *track, | |
189 | const char *remover) { | |
190 | static notify_queue_fn *f; | |
191 | ||
192 | if(!f) | |
193 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", | |
194 | PLUGIN_FATAL), | |
195 | "disorder_notify_queue_remove"); | |
196 | (*f)(track, remover); | |
197 | } | |
198 | ||
199 | void notify_queue_move(const char *track, | |
200 | const char *mover) { | |
201 | static notify_queue_fn *f; | |
202 | ||
203 | if(!f) | |
204 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", | |
205 | PLUGIN_FATAL), | |
206 | "disorder_notify_queue_move"); | |
207 | (*f)(track, mover); | |
208 | } | |
209 | ||
210 | void notify_pause(const char *track, const char *who) { | |
211 | static notify_queue_fn *f; | |
212 | ||
213 | if(!f) | |
214 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", | |
215 | PLUGIN_FATAL), | |
216 | "disorder_notify_pause"); | |
217 | (*f)(track, who); | |
218 | } | |
219 | ||
220 | void notify_resume(const char *track, const char *who) { | |
221 | static notify_queue_fn *f; | |
222 | ||
223 | if(!f) | |
224 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", | |
225 | PLUGIN_FATAL), | |
226 | "disorder_notify_resume"); | |
227 | (*f)(track, who); | |
228 | } | |
229 | ||
230 | /* player plugin interfaces ***************************************************/ | |
231 | ||
232 | /* get type */ | |
233 | ||
234 | unsigned long play_get_type(const struct plugin *pl) { | |
235 | return *(const unsigned long *)get_plugin_object(pl, "disorder_player_type"); | |
236 | } | |
237 | ||
238 | /* prefork */ | |
239 | ||
240 | typedef void *prefork_fn(const char *track); | |
241 | ||
242 | void *play_prefork(const struct plugin *pl, | |
243 | const char *track) { | |
244 | return ((prefork_fn *)get_plugin_function(pl, | |
245 | "disorder_play_prefork"))(track); | |
246 | } | |
247 | ||
248 | /* play */ | |
249 | ||
250 | typedef void play_track_fn(const char *const *parameters, | |
251 | int nparameters, | |
252 | const char *path, | |
253 | const char *track); | |
254 | ||
255 | void play_track(const struct plugin *pl, | |
256 | const char *const *parameters, | |
257 | int nparameters, | |
258 | const char *path, | |
259 | const char *track) { | |
260 | ((play_track_fn *)get_plugin_function(pl, | |
261 | "disorder_play_track"))(parameters, | |
262 | nparameters, | |
263 | path, | |
264 | track); | |
265 | } | |
266 | ||
267 | /* cleanup */ | |
268 | ||
269 | typedef void cleanup_fn(void *data); | |
270 | ||
271 | void play_cleanup(const struct plugin *pl, void *data) { | |
272 | ((cleanup_fn *)get_plugin_function(pl, "disorder_play_cleanup"))(data); | |
273 | } | |
274 | ||
275 | /* pause */ | |
276 | ||
277 | typedef int pause_fn(long *playedp, void *data); | |
278 | ||
279 | int play_pause(const struct plugin *pl, long *playedp, void *data) { | |
280 | return (((pause_fn *)get_plugin_function(pl, "disorder_pause_track")) | |
281 | (playedp, data)); | |
282 | } | |
283 | ||
284 | /* resume */ | |
285 | ||
286 | typedef void resume_fn(void *data); | |
287 | ||
288 | void play_resume(const struct plugin *pl, void *data) { | |
289 | (((resume_fn *)get_plugin_function(pl, "disorder_resume_track")) | |
290 | (data)); | |
291 | } | |
292 | ||
293 | /* | |
294 | Local Variables: | |
295 | c-basic-offset:2 | |
296 | comment-column:40 | |
297 | End: | |
298 | */ |