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1 | /* |
2 | * This file is part of DisOrder. |
3 | * Copyright (C) 2004, 2005, 2006 Richard Kettlewell |
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 | |
21 | #include <config.h> |
6d2d327c |
22 | #include "types.h" |
460b9539 |
23 | |
24 | #include <dlfcn.h> |
25 | #include <unistd.h> |
26 | #include <string.h> |
27 | #include <stdio.h> |
28 | |
29 | #include "plugin.h" |
30 | #include "configuration.h" |
31 | #include "log.h" |
32 | #include "mem.h" |
33 | #include "defs.h" |
34 | #include "disorder.h" |
35 | #include "printf.h" |
36 | |
37 | /* generic plugin support *****************************************************/ |
38 | |
39 | #ifndef SOSUFFIX |
40 | # define SOSUFFIX ".so" |
41 | #endif |
42 | |
43 | struct plugin { |
44 | struct plugin *next; |
45 | void *dlhandle; |
46 | const char *name; |
47 | }; |
48 | |
49 | static struct plugin *plugins; |
50 | |
51 | const struct plugin *open_plugin(const char *name, |
52 | unsigned flags) { |
53 | void *h = 0; |
54 | char *p; |
55 | int n; |
56 | struct plugin *pl; |
57 | |
58 | for(pl = plugins; pl && strcmp(pl->name, name); pl = pl->next) |
59 | ; |
60 | if(pl) return pl; |
61 | for(n = 0; n <= config->plugins.n; ++n) { |
62 | byte_xasprintf(&p, "%s/%s" SOSUFFIX, |
63 | n == config->plugins.n ? pkglibdir : config->plugins.s[n], |
64 | name); |
65 | if(access(p, R_OK) == 0) { |
66 | h = dlopen(p, RTLD_NOW); |
67 | if(!h) { |
68 | error(0, "error opening %s: %s", p, dlerror()); |
69 | continue; |
70 | } |
71 | pl = xmalloc(sizeof *pl); |
72 | pl->dlhandle = h; |
73 | pl->name = xstrdup(name); |
74 | pl->next = plugins; |
75 | plugins = pl; |
76 | return pl; |
77 | } |
78 | } |
79 | (flags & PLUGIN_FATAL ? fatal : error)(0, "cannot find plugin '%s'", name); |
80 | return 0; |
81 | } |
82 | |
83 | function_t *get_plugin_function(const struct plugin *pl, |
84 | const char *symbol) { |
85 | function_t *f; |
86 | const char *e; |
87 | |
88 | f = (function_t *)dlsym(pl->dlhandle, symbol); |
89 | if((e = dlerror())) |
90 | fatal(0, "error looking up function '%s' in '%s': %s",symbol, pl->name, e); |
91 | return f; |
92 | } |
93 | |
94 | const void *get_plugin_object(const struct plugin *pl, |
95 | const char *symbol) { |
96 | void *o; |
97 | const char *e; |
98 | |
99 | o = dlsym(pl->dlhandle, symbol); |
100 | if((e = dlerror())) |
101 | fatal(0, "error looking up object '%s' in '%s': %s", symbol, pl->name, e); |
102 | return o; |
103 | } |
104 | |
105 | /* specific plugin interfaces *************************************************/ |
106 | |
107 | typedef long tracklength_fn(const char *track, const char *path); |
108 | |
109 | long tracklength(const char *track, const char *path) { |
110 | static tracklength_fn *f = 0; |
111 | |
112 | if(!f) |
113 | f = (tracklength_fn *)get_plugin_function(open_plugin("tracklength", |
114 | PLUGIN_FATAL), |
115 | "disorder_tracklength"); |
116 | return (*f)(track, path); |
117 | } |
118 | |
119 | typedef void scan_fn(const char *root); |
120 | |
121 | void scan(const char *module, const char *root) { |
122 | ((scan_fn *)get_plugin_function(open_plugin(module, PLUGIN_FATAL), |
123 | "disorder_scan"))(root); |
124 | } |
125 | |
126 | typedef int check_fn(const char *root, const char *path); |
127 | |
128 | |
129 | int check(const char *module, const char *root, const char *path) { |
130 | return ((check_fn *)get_plugin_function(open_plugin(module, PLUGIN_FATAL), |
131 | "disorder_check"))(root, path); |
132 | } |
133 | |
134 | typedef void notify_play_fn(const char *track, const char *submitter); |
135 | |
136 | void notify_play(const char *track, |
137 | const char *submitter) { |
138 | static notify_play_fn *f; |
139 | |
140 | if(!f) |
141 | f = (notify_play_fn *)get_plugin_function(open_plugin("notify", |
142 | PLUGIN_FATAL), |
143 | "disorder_notify_play"); |
144 | (*f)(track, submitter); |
145 | } |
146 | |
147 | typedef void notify_scratch_fn(const char *track, |
148 | const char *submitter, |
149 | const char *scratcher, |
150 | int seconds); |
151 | |
152 | void notify_scratch(const char *track, |
153 | const char *submitter, |
154 | const char *scratcher, |
155 | int seconds) { |
156 | static notify_scratch_fn *f; |
157 | |
158 | if(!f) |
159 | f = (notify_scratch_fn *)get_plugin_function(open_plugin("notify", |
160 | PLUGIN_FATAL), |
161 | "disorder_notify_scratch"); |
162 | (*f)(track, submitter, scratcher, seconds); |
163 | } |
164 | |
165 | typedef void notify_not_scratched_fn(const char *track, |
166 | const char *submitter); |
167 | |
168 | void notify_not_scratched(const char *track, |
169 | const char *submitter) { |
170 | static notify_not_scratched_fn *f; |
171 | |
172 | if(!f) |
173 | f = (notify_not_scratched_fn *)get_plugin_function |
174 | (open_plugin("notify", |
175 | PLUGIN_FATAL), |
176 | "disorder_notify_not_scratched"); |
177 | (*f)(track, submitter); |
178 | } |
179 | |
180 | typedef void notify_queue_fn(const char *track, |
181 | const char *submitter); |
182 | |
183 | void notify_queue(const char *track, |
184 | const char *submitter) { |
185 | static notify_queue_fn *f; |
186 | |
187 | if(!f) |
188 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", |
189 | PLUGIN_FATAL), |
190 | "disorder_notify_queue"); |
191 | (*f)(track, submitter); |
192 | } |
193 | |
194 | void notify_queue_remove(const char *track, |
195 | const char *remover) { |
196 | static notify_queue_fn *f; |
197 | |
198 | if(!f) |
199 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", |
200 | PLUGIN_FATAL), |
201 | "disorder_notify_queue_remove"); |
202 | (*f)(track, remover); |
203 | } |
204 | |
205 | void notify_queue_move(const char *track, |
206 | const char *mover) { |
207 | static notify_queue_fn *f; |
208 | |
209 | if(!f) |
210 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", |
211 | PLUGIN_FATAL), |
212 | "disorder_notify_queue_move"); |
213 | (*f)(track, mover); |
214 | } |
215 | |
216 | void notify_pause(const char *track, const char *who) { |
217 | static notify_queue_fn *f; |
218 | |
219 | if(!f) |
220 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", |
221 | PLUGIN_FATAL), |
222 | "disorder_notify_pause"); |
223 | (*f)(track, who); |
224 | } |
225 | |
226 | void notify_resume(const char *track, const char *who) { |
227 | static notify_queue_fn *f; |
228 | |
229 | if(!f) |
230 | f = (notify_queue_fn *)get_plugin_function(open_plugin("notify", |
231 | PLUGIN_FATAL), |
232 | "disorder_notify_resume"); |
233 | (*f)(track, who); |
234 | } |
235 | |
236 | /* player plugin interfaces ***************************************************/ |
237 | |
238 | /* get type */ |
239 | |
240 | unsigned long play_get_type(const struct plugin *pl) { |
241 | return *(const unsigned long *)get_plugin_object(pl, "disorder_player_type"); |
242 | } |
243 | |
244 | /* prefork */ |
245 | |
246 | typedef void *prefork_fn(const char *track); |
247 | |
248 | void *play_prefork(const struct plugin *pl, |
249 | const char *track) { |
250 | return ((prefork_fn *)get_plugin_function(pl, |
251 | "disorder_play_prefork"))(track); |
252 | } |
253 | |
254 | /* play */ |
255 | |
256 | typedef void play_track_fn(const char *const *parameters, |
257 | int nparameters, |
258 | const char *path, |
259 | const char *track); |
260 | |
261 | void play_track(const struct plugin *pl, |
262 | const char *const *parameters, |
263 | int nparameters, |
264 | const char *path, |
265 | const char *track) { |
266 | ((play_track_fn *)get_plugin_function(pl, |
267 | "disorder_play_track"))(parameters, |
268 | nparameters, |
269 | path, |
270 | track); |
271 | } |
272 | |
273 | /* cleanup */ |
274 | |
275 | typedef void cleanup_fn(void *data); |
276 | |
277 | void play_cleanup(const struct plugin *pl, void *data) { |
278 | ((cleanup_fn *)get_plugin_function(pl, "disorder_play_cleanup"))(data); |
279 | } |
280 | |
281 | /* pause */ |
282 | |
283 | typedef int pause_fn(long *playedp, void *data); |
284 | |
285 | int play_pause(const struct plugin *pl, long *playedp, void *data) { |
286 | return (((pause_fn *)get_plugin_function(pl, "disorder_pause_track")) |
287 | (playedp, data)); |
288 | } |
289 | |
290 | /* resume */ |
291 | |
292 | typedef void resume_fn(void *data); |
293 | |
294 | void play_resume(const struct plugin *pl, void *data) { |
295 | (((resume_fn *)get_plugin_function(pl, "disorder_resume_track")) |
296 | (data)); |
297 | } |
298 | |
299 | /* |
300 | Local Variables: |
301 | c-basic-offset:2 |
302 | comment-column:40 |
303 | End: |
304 | */ |