2 * This file is part of DisOrder
3 * Copyright (C) 2008 Richard Kettlewell
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 3 of the License, or
8 * (at your option) any later version.
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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file server/disorder-server.h
19 * @brief Definitions for server and allied utilities
22 #ifndef DISORDER_SERVER_H
23 #define DISORDER_SERVER_H
35 #include <netinet/in.h>
40 #include <sys/socket.h>
43 #include <sys/types.h>
54 #include "configuration.h"
63 #include "inputline.h"
76 #include "speaker-protocol.h"
80 #include "trackdb-int.h"
82 #include "trackname.h"
89 void daemonize(const char *tag, int fac, const char *pidfile);
90 /* Go into background. Send stdout/stderr to syslog.
91 * If @pri@ is non-null, it should be "facility.level"
92 * If @tag@ is non-null, it is used as a tag to each message
93 * If @pidfile@ is non-null, the PID is written to that file.
96 void quit(ev_source *ev) attribute((noreturn));
97 /* terminate the daemon */
99 int reconfigure(ev_source *ev, int reload);
100 /* reconfigure. If @reload@ is nonzero, update the configuration. */
102 extern struct queue_entry qhead;
103 /* queue of things yet to be played. the head will be played
106 extern struct queue_entry phead;
107 /* things that have been played in the past. the head is the oldest. */
111 void queue_read(void);
112 /* read the queue in. Calls @fatal@ on error. */
114 void queue_write(void);
115 /* write the queue out. Calls @fatal@ on error. */
117 void recent_read(void);
118 /* read the recently played list in. Calls @fatal@ on error. */
120 void recent_write(void);
121 /* write the recently played list out. Calls @fatal@ on error. */
123 struct queue_entry *queue_add(const char *track, const char *submitter,
124 int where, enum track_origin origin);
125 #define WHERE_START 0 /* Add to head of queue */
126 #define WHERE_END 1 /* Add to end of queue */
127 #define WHERE_BEFORE_RANDOM 2 /* End, or before random track */
128 /* add an entry to the queue. Return a pointer to the new entry. */
130 void queue_remove(struct queue_entry *q, const char *who);
131 /* remove an from the queue */
133 struct queue_entry *queue_find(const char *key);
134 /* find a track in the queue by name or ID */
136 void queue_played(struct queue_entry *q);
137 /* add @q@ to the played list */
139 int queue_move(struct queue_entry *q, int delta, const char *who);
140 /* move element @q@ in the queue towards the front (@delta@ > 0) or towards the
141 * back (@delta@ < 0). The return value is the leftover delta once we've hit
142 * the end in whichever direction we were going. */
144 void queue_moveafter(struct queue_entry *target,
145 int nqs, struct queue_entry **qs, const char *who);
146 /* Move all the elements QS to just after TARGET, or to the head if
149 void queue_fix_sofar(struct queue_entry *q);
150 /* Fix up the sofar field for standalone players */
152 void schedule_init(ev_source *ev);
153 const char *schedule_add(ev_source *ev,
154 struct kvp *actiondata);
155 int schedule_del(const char *id);
156 struct kvp *schedule_get(const char *id);
157 char **schedule_list(int *neventsp);
159 extern struct queue_entry *playing; /* playing track or 0 */
160 extern int paused; /* non-0 if paused */
162 void play(ev_source *ev);
163 /* try to play something, if playing is enabled and nothing is playing
166 int playing_is_enabled(void);
167 /* return true iff playing is enabled */
169 void enable_playing(const char *who, ev_source *ev);
172 void disable_playing(const char *who);
173 /* disable playing. */
175 int random_is_enabled(void);
176 /* return true iff random play is enabled */
178 void enable_random(const char *who, ev_source *ev);
179 /* enable random play */
181 void disable_random(const char *who);
182 /* disable random play */
184 void scratch(const char *who, const char *id);
185 /* scratch the playing track. @who@ identifies the scratcher. @id@ is
186 * the ID or a null pointer. */
188 void quitting(ev_source *ev);
189 /* called to terminate current track and shut down speaker process
192 void speaker_setup(ev_source *ev);
193 /* set up the speaker subprocess */
195 void speaker_reload(void);
196 /* Tell the speaker process to reload its configuration. */
198 int pause_playing(const char *who);
199 /* Pause the current track. Return 0 on success, -1 on error. WHO
202 void resume_playing(const char *who);
203 /* Resume after a pause. WHO can be 0. */
205 int prepare(ev_source *ev,
206 struct queue_entry *q);
207 /* Prepare to play Q */
209 void abandon(ev_source *ev,
210 struct queue_entry *q);
211 /* Abandon a possibly-prepared track. */
213 void add_random_track(ev_source *ev);
214 /* If random play is enabled then try to add a track to the queue. */
216 int server_start(ev_source *ev, int pf,
217 size_t socklen, const struct sockaddr *sa,
219 /* start listening. Return the fd. */
221 int server_stop(ev_source *ev, int fd);
222 /* Stop listening on @fd@ */
224 extern int volume_left, volume_right; /* last known volume */
226 extern int wideopen; /* blindly accept all logins */
232 typedef void *plugin_handle;
233 typedef void function_t(void);
235 const struct plugin *open_plugin(const char *name,
237 #define PLUGIN_FATAL 0x0001 /* fatal() on error */
238 /* Open a plugin. Returns a null pointer on error or a handle to it
241 function_t *get_plugin_function(const struct plugin *handle,
243 const void *get_plugin_object(const struct plugin *handle,
245 /* Look up a function or an object in a plugin */
247 /* track length computation ***************************************************/
249 long tracklength(const char *plugin, const char *track, const char *path);
251 /* collection interface *******************************************************/
253 void scan(const char *module, const char *root);
254 /* write a list of path names below @root@ to standard output. */
256 int check(const char *module, const char *root, const char *path);
257 /* Recheck a track, given its root and path name. Return 1 if it
258 * exists, 0 if it does not exist and -1 if an error occurred. */
260 /* notification interface *****************************************************/
262 void notify_play(const char *track,
263 const char *submitter);
264 /* we're going to play @track@. It was submitted by @submitter@
265 * (might be a null pointer) */
267 void notify_scratch(const char *track,
268 const char *submitter,
269 const char *scratcher,
271 /* @scratcher@ scratched @track@ after @seconds@. It was submitted by
272 * @submitter@ (might be a null pointer) */
274 void notify_not_scratched(const char *track,
275 const char *submitter);
276 /* @track@ (submitted by @submitter@, which might be a null pointer)
277 * was not scratched. */
279 void notify_queue(const char *track,
280 const char *submitter);
281 /* @track@ was queued by @submitter@ */
283 void notify_queue_remove(const char *track,
284 const char *remover);
285 /* @track@ removed from the queue by @remover@ (never a null pointer) */
287 void notify_queue_move(const char *track,
289 /* @track@ moved in the queue by @mover@ (never a null pointer) */
291 void notify_pause(const char *track,
293 /* TRACK was paused by PAUSER (might be a null pointer) */
295 void notify_resume(const char *track,
296 const char *resumer);
297 /* TRACK was resumed by PAUSER (might be a null pointer) */
299 /* track playing **************************************************************/
301 unsigned long play_get_type(const struct plugin *pl);
302 /* Get the type word for this plugin */
304 void *play_prefork(const struct plugin *pl,
306 /* Call the prefork function for PL and return the user data */
308 void play_track(const struct plugin *pl,
309 const char *const *parameters,
313 /* play a track. Called inside a fork. */
315 void play_cleanup(const struct plugin *pl, void *data);
316 /* Call the cleanup function for PL if necessary */
318 int play_pause(const struct plugin *pl, long *playedp, void *data);
321 void play_resume(const struct plugin *pl, void *data);
324 #endif /* DISORDER_SERVER_H */