Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
16fb2830 | 3 | * Copyright (C) 2004-2009 Richard Kettlewell |
460b9539 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 8 | * (at your option) any later version. |
9 | * | |
e7eb3a27 RK |
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 | * | |
460b9539 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 17 | */ |
132a5a4a RK |
18 | /** @file server/play.c |
19 | * @brief Playing tracks | |
5bac5b78 RK |
20 | * |
21 | * This file is rather badly organized. Sorry. It's better than it was... | |
132a5a4a | 22 | */ |
460b9539 | 23 | |
05b75f8d | 24 | #include "disorder-server.h" |
460b9539 | 25 | #include <ao/ao.h> |
460b9539 | 26 | |
27 | #define SPEAKER "disorder-speaker" | |
28 | ||
16fb2830 | 29 | /** @brief The current playing track or NULL */ |
460b9539 | 30 | struct queue_entry *playing; |
16fb2830 RK |
31 | |
32 | /** @brief Set when paused */ | |
460b9539 | 33 | int paused; |
34 | ||
35 | static void finished(ev_source *ev); | |
5bac5b78 RK |
36 | static int start_child(struct queue_entry *q, |
37 | const struct pbgc_params *params, | |
38 | void attribute((unused)) *bgdata); | |
39 | static int prepare_child(struct queue_entry *q, | |
40 | const struct pbgc_params *params, | |
41 | void attribute((unused)) *bgdata); | |
460b9539 | 42 | |
16fb2830 | 43 | /** @brief File descriptor of our end of the socket to the speaker */ |
460b9539 | 44 | static int speaker_fd = -1; |
16fb2830 | 45 | |
16fb2830 | 46 | /** @brief Set when shutting down */ |
460b9539 | 47 | static int shutting_down; |
48 | ||
5bac5b78 RK |
49 | /* Speaker ------------------------------------------------------------------ */ |
50 | ||
16fb2830 RK |
51 | /** @brief Called when speaker process terminates |
52 | * | |
53 | * Currently kills of DisOrder completely. A future version could terminate | |
54 | * the speaker when nothing was going on, or recover from failures, though any | |
55 | * tracks with decoders already started would need to have them restarted. | |
56 | */ | |
460b9539 | 57 | static int speaker_terminated(ev_source attribute((unused)) *ev, |
58 | pid_t attribute((unused)) pid, | |
59 | int attribute((unused)) status, | |
60 | const struct rusage attribute((unused)) *rusage, | |
61 | void attribute((unused)) *u) { | |
2e9ba080 | 62 | disorder_fatal(0, "speaker subprocess %s", wstat(status)); |
460b9539 | 63 | } |
64 | ||
16fb2830 | 65 | /** @brief Called when we get a message from the speaker process */ |
460b9539 | 66 | static int speaker_readable(ev_source *ev, int fd, |
67 | void attribute((unused)) *u) { | |
68 | struct speaker_message sm; | |
84aa9f93 | 69 | int ret = speaker_recv(fd, &sm); |
460b9539 | 70 | |
71 | if(ret < 0) return 0; /* EAGAIN */ | |
72 | if(!ret) { /* EOF */ | |
73 | ev_fd_cancel(ev, ev_read, fd); | |
74 | return 0; | |
75 | } | |
76 | switch(sm.type) { | |
77 | case SM_PAUSED: | |
78 | /* track ID is paused, DATA seconds played */ | |
79 | D(("SM_PAUSED %s %ld", sm.id, sm.data)); | |
80 | playing->sofar = sm.data; | |
81 | break; | |
819f5988 RK |
82 | case SM_FINISHED: /* scratched the playing track */ |
83 | case SM_STILLBORN: /* scratched too early */ | |
84 | case SM_UNKNOWN: /* scratched WAY too early */ | |
2b2a5fed RK |
85 | if(playing && !strcmp(sm.id, playing->id)) |
86 | finished(ev); | |
87 | break; | |
460b9539 | 88 | case SM_PLAYING: |
89 | /* track ID is playing, DATA seconds played */ | |
90 | D(("SM_PLAYING %s %ld", sm.id, sm.data)); | |
91 | playing->sofar = sm.data; | |
92 | break; | |
93 | default: | |
2e9ba080 | 94 | disorder_error(0, "unknown speaker message type %d", sm.type); |
460b9539 | 95 | } |
96 | return 0; | |
97 | } | |
98 | ||
16fb2830 | 99 | /** @brief Initialize the speaker process */ |
460b9539 | 100 | void speaker_setup(ev_source *ev) { |
4387f694 | 101 | int sp[2]; |
460b9539 | 102 | pid_t pid; |
937be4c0 | 103 | struct speaker_message sm; |
460b9539 | 104 | |
105 | if(socketpair(PF_UNIX, SOCK_DGRAM, 0, sp) < 0) | |
2e9ba080 | 106 | disorder_fatal(errno, "error calling socketpair"); |
460b9539 | 107 | if(!(pid = xfork())) { |
108 | exitfn = _exit; | |
109 | ev_signal_atfork(ev); | |
110 | xdup2(sp[0], 0); | |
111 | xdup2(sp[0], 1); | |
112 | xclose(sp[0]); | |
113 | xclose(sp[1]); | |
460b9539 | 114 | signal(SIGPIPE, SIG_DFL); |
115 | #if 0 | |
116 | execlp("valgrind", "valgrind", SPEAKER, "--config", configfile, | |
0ca6d097 RK |
117 | debugging ? "--debug" : "--no-debug", |
118 | log_default == &log_syslog ? "--syslog" : "--no-syslog", | |
119 | (char *)0); | |
460b9539 | 120 | #else |
121 | execlp(SPEAKER, SPEAKER, "--config", configfile, | |
0ca6d097 RK |
122 | debugging ? "--debug" : "--no-debug", |
123 | log_default == &log_syslog ? "--syslog" : "--no-syslog", | |
124 | (char *)0); | |
460b9539 | 125 | #endif |
2e9ba080 | 126 | disorder_fatal(errno, "error invoking %s", SPEAKER); |
460b9539 | 127 | } |
128 | ev_child(ev, pid, 0, speaker_terminated, 0); | |
129 | speaker_fd = sp[1]; | |
130 | xclose(sp[0]); | |
131 | cloexec(speaker_fd); | |
937be4c0 RK |
132 | /* Wait for the speaker to be ready */ |
133 | speaker_recv(speaker_fd, &sm); | |
134 | nonblock(speaker_fd); | |
31e2a93e | 135 | if(ev_fd(ev, ev_read, speaker_fd, speaker_readable, 0, "speaker read") < 0) |
2e9ba080 | 136 | disorder_fatal(0, "error registering speaker socket fd"); |
460b9539 | 137 | } |
138 | ||
16fb2830 | 139 | /** @brief Tell the speaker to reload its configuration */ |
460b9539 | 140 | void speaker_reload(void) { |
141 | struct speaker_message sm; | |
142 | ||
143 | memset(&sm, 0, sizeof sm); | |
144 | sm.type = SM_RELOAD; | |
84aa9f93 | 145 | speaker_send(speaker_fd, &sm); |
460b9539 | 146 | } |
147 | ||
5bac5b78 RK |
148 | /* Track termination -------------------------------------------------------- */ |
149 | ||
16fb2830 RK |
150 | /** @brief Called when the currently playing track finishes playing |
151 | * @param ev Event loop or NULL | |
152 | * | |
153 | * There are three places this is called from: | |
154 | * | |
155 | * 1) speaker_readable(), when the speaker tells us the playing track finished. | |
156 | * (Technically the speaker lies a little to arrange for gapless play.) | |
157 | * | |
158 | * 2) player_finished(), when the player for a non-raw track (i.e. one that | |
159 | * does not use the speaker) finishes. | |
160 | * | |
161 | * 3) quitting(), after signalling the decoder or player but possible before it | |
162 | * has actually terminated. In this case @p ev is NULL, inhibiting any further | |
163 | * attempt to play anything. | |
164 | */ | |
460b9539 | 165 | static void finished(ev_source *ev) { |
166 | D(("finished playing=%p", (void *)playing)); | |
167 | if(!playing) | |
168 | return; | |
169 | if(playing->state != playing_scratched) | |
170 | notify_not_scratched(playing->track, playing->submitter); | |
171 | switch(playing->state) { | |
172 | case playing_ok: | |
173 | eventlog("completed", playing->track, (char *)0); | |
174 | break; | |
175 | case playing_scratched: | |
176 | eventlog("scratched", playing->track, playing->scratched, (char *)0); | |
177 | break; | |
178 | case playing_failed: | |
179 | eventlog("failed", playing->track, wstat(playing->wstat), (char *)0); | |
180 | break; | |
181 | default: | |
182 | break; | |
183 | } | |
184 | queue_played(playing); | |
185 | recent_write(); | |
460b9539 | 186 | playing = 0; |
49a773eb | 187 | /* Try to play something else */ |
49a773eb RK |
188 | if(ev) |
189 | play(ev); | |
460b9539 | 190 | } |
191 | ||
16fb2830 RK |
192 | /** @brief Called when a player or decoder process terminates |
193 | * | |
194 | * This is called when a decoder process terminates (which might actually be | |
195 | * some time before the speaker reports it as finished) or when a non-raw | |
196 | * (i.e. non-speaker) player terminates. In the latter case it's imaginable | |
197 | * that the OS has buffered the last few samples. | |
198 | * | |
199 | */ | |
460b9539 | 200 | static int player_finished(ev_source *ev, |
201 | pid_t pid, | |
202 | int status, | |
203 | const struct rusage attribute((unused)) *rusage, | |
204 | void *u) { | |
205 | struct queue_entry *q = u; | |
206 | ||
207 | D(("player_finished pid=%lu status=%#x", | |
208 | (unsigned long)pid, (unsigned)status)); | |
209 | /* Record that this PID is dead. If we killed the track we might know this | |
210 | * already, but also it might have exited or crashed. Either way we don't | |
211 | * want to end up signalling it. */ | |
90b8faa5 | 212 | q->pid = -1; |
460b9539 | 213 | switch(q->state) { |
214 | case playing_unplayed: | |
215 | case playing_random: | |
84aa9f93 | 216 | /* If this was a pre-prepared track then either it failed or we |
16fb2830 RK |
217 | * deliberately stopped it: it might have been removed from the queue, or |
218 | * moved down the queue, or the speaker might be on a break. So we leave | |
219 | * it state alone for future use. | |
220 | */ | |
460b9539 | 221 | break; |
222 | default: | |
223 | /* We actually started playing this track. */ | |
224 | if(status) { | |
16fb2830 | 225 | /* Don't override 'scratched' with 'failed'. */ |
460b9539 | 226 | if(q->state != playing_scratched) |
227 | q->state = playing_failed; | |
228 | } else | |
229 | q->state = playing_ok; | |
230 | break; | |
231 | } | |
232 | /* Regardless we always report and record the status and do cleanup for | |
233 | * prefork calls. */ | |
234 | if(status) | |
2e9ba080 | 235 | disorder_error(0, "player for %s %s", q->track, wstat(status)); |
460b9539 | 236 | if(q->type & DISORDER_PLAYER_PREFORK) |
237 | play_cleanup(q->pl, q->data); | |
238 | q->wstat = status; | |
239 | /* If this actually was the current track, and does not use the speaker | |
240 | * process, then it must have finished. For raw-output players we will get a | |
241 | * separate notification from the speaker process. */ | |
242 | if(q == playing | |
243 | && (q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) | |
244 | finished(ev); | |
245 | return 0; | |
246 | } | |
247 | ||
5bac5b78 RK |
248 | /* Track initiation --------------------------------------------------------- */ |
249 | ||
16fb2830 | 250 | /** @brief Find the player for @p q */ |
5bac5b78 | 251 | static const struct stringlist *find_player(const struct queue_entry *q) { |
460b9539 | 252 | int n; |
253 | ||
254 | for(n = 0; n < config->player.n; ++n) | |
255 | if(fnmatch(config->player.s[n].s[0], q->track, 0) == 0) | |
256 | break; | |
257 | if(n >= config->player.n) | |
5bac5b78 | 258 | return NULL; |
460b9539 | 259 | else |
5bac5b78 | 260 | return &config->player.s[n]; |
460b9539 | 261 | } |
262 | ||
5bac5b78 | 263 | /** @brief Start to play @p q |
84aa9f93 RK |
264 | * @param ev Event loop |
265 | * @param q Track to play/prepare | |
3149c1e2 | 266 | * @return @ref START_OK, @ref START_HARDFAIL or @ref START_SOFTFAIL |
16fb2830 | 267 | * |
5bac5b78 | 268 | * This makes @p actually start playing. It calls prepare() if necessary and |
c0f52b2c | 269 | * either sends an @ref SM_PLAY command or invokes the player itself in a |
5bac5b78 | 270 | * subprocess. |
16fb2830 | 271 | * |
5bac5b78 RK |
272 | * It's up to the caller to set @ref playing and @c playing->state (this might |
273 | * be changed in the future). | |
84aa9f93 | 274 | */ |
460b9539 | 275 | static int start(ev_source *ev, |
5bac5b78 RK |
276 | struct queue_entry *q) { |
277 | const struct stringlist *player; | |
278 | int rc; | |
460b9539 | 279 | |
5bac5b78 | 280 | D(("start %s", q->id)); |
460b9539 | 281 | /* Find the player plugin. */ |
5bac5b78 RK |
282 | if(!(player = find_player(q)) < 0) |
283 | return START_HARDFAIL; /* No player */ | |
284 | if(!(q->pl = open_plugin(player->s[1], 0))) | |
460b9539 | 285 | return START_HARDFAIL; |
286 | q->type = play_get_type(q->pl); | |
5bac5b78 RK |
287 | /* Special handling for raw-format players */ |
288 | if((q->type & DISORDER_PLAYER_TYPEMASK) == DISORDER_PLAYER_RAW) { | |
289 | /* Make sure that the track is prepared */ | |
290 | if((rc = prepare(ev, q))) | |
291 | return rc; | |
292 | /* Now we're sure it's prepared, start it playing */ | |
293 | /* TODO actually it might not be fully prepared yet - it's all happening in | |
294 | * a subprocess. See speaker.c for further discussion. */ | |
295 | struct speaker_message sm[1]; | |
296 | memset(sm, 0, sizeof sm); | |
297 | strcpy(sm->id, q->id); | |
298 | sm->type = SM_PLAY; | |
299 | speaker_send(speaker_fd, sm); | |
300 | D(("sent SM_PLAY for %s", sm->id)); | |
301 | /* Our caller will set playing and playing->state = playing_started */ | |
460b9539 | 302 | return START_OK; |
5bac5b78 RK |
303 | } else { |
304 | rc = play_background(ev, player, q, start_child, NULL); | |
305 | if(rc == START_OK) | |
306 | ev_child(ev, q->pid, 0, player_finished, q); | |
307 | /* Our caller will set playing and playing->state = playing_started */ | |
308 | return rc; | |
460b9539 | 309 | } |
5bac5b78 RK |
310 | } |
311 | ||
6ac9a215 RK |
312 | /** @brief Child-process half of start() |
313 | * @return Process exit code | |
314 | * | |
315 | * Called in subprocess to execute non-raw-format players (via plugin). | |
316 | */ | |
5bac5b78 RK |
317 | static int start_child(struct queue_entry *q, |
318 | const struct pbgc_params *params, | |
319 | void attribute((unused)) *bgdata) { | |
320 | int n; | |
321 | ||
322 | /* Wait for a device to clear. This ugliness is now deprecated and will | |
323 | * eventually be removed. */ | |
324 | if(params->waitdevice) { | |
325 | ao_initialize(); | |
326 | if(*params->waitdevice) { | |
327 | n = ao_driver_id(params->waitdevice); | |
328 | if(n == -1) | |
2e9ba080 | 329 | disorder_fatal(0, "invalid libao driver: %s", params->waitdevice); |
5bac5b78 RK |
330 | } else |
331 | n = ao_default_driver_id(); | |
332 | /* Make up a format. */ | |
333 | ao_sample_format format; | |
334 | memset(&format, 0, sizeof format); | |
335 | format.bits = 8; | |
336 | format.rate = 44100; | |
337 | format.channels = 1; | |
338 | format.byte_format = AO_FMT_NATIVE; | |
339 | int retries = 20; | |
340 | struct timespec ts; | |
341 | ts.tv_sec = 0; | |
342 | ts.tv_nsec = 100000000; /* 0.1s */ | |
343 | ao_device *device; | |
344 | while((device = ao_open_live(n, &format, 0)) == 0 && retries-- > 0) | |
345 | nanosleep(&ts, 0); | |
346 | if(device) | |
347 | ao_close(device); | |
460b9539 | 348 | } |
5bac5b78 RK |
349 | /* Play the track */ |
350 | play_track(q->pl, | |
351 | params->argv, params->argc, | |
352 | params->rawpath, | |
353 | q->track); | |
354 | return 0; | |
460b9539 | 355 | } |
356 | ||
16fb2830 | 357 | /** @brief Prepare a track for later play |
5bac5b78 | 358 | * @return @ref START_OK, @ref START_HARDFAIL or @ref START_SOFTFAIL |
16fb2830 | 359 | * |
6ac9a215 RK |
360 | * This can be called either when we want to play the track or slightly before |
361 | * so that some samples are decoded and available in a buffer. | |
362 | * | |
5bac5b78 RK |
363 | * Only applies to raw-format (i.e. speaker-using) players; everything else |
364 | * gets @c START_OK. | |
16fb2830 | 365 | */ |
460b9539 | 366 | int prepare(ev_source *ev, |
367 | struct queue_entry *q) { | |
5bac5b78 | 368 | const struct stringlist *player; |
460b9539 | 369 | |
90b8faa5 RK |
370 | /* If there's a decoder (or player!) going we do nothing */ |
371 | if(q->pid >= 0) | |
5bac5b78 RK |
372 | return START_OK; |
373 | /* If the track is already prepared, do nothing */ | |
374 | if(q->prepared) | |
375 | return START_OK; | |
460b9539 | 376 | /* Find the player plugin */ |
5bac5b78 RK |
377 | if(!(player = find_player(q)) < 0) |
378 | return START_HARDFAIL; /* No player */ | |
379 | q->pl = open_plugin(player->s[1], 0); | |
460b9539 | 380 | q->type = play_get_type(q->pl); |
381 | if((q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) | |
5bac5b78 RK |
382 | return START_OK; /* Not a raw player */ |
383 | const int rc = play_background(ev, player, q, prepare_child, NULL); | |
384 | if(rc == START_OK) { | |
385 | ev_child(ev, q->pid, 0, player_finished, q); | |
386 | q->prepared = 1; | |
387 | } | |
388 | return rc; | |
389 | } | |
390 | ||
6ac9a215 RK |
391 | /** @brief Child-process half of prepare() |
392 | * @return Process exit code | |
393 | * | |
394 | * Called in subprocess to execute the decoder for a raw-format player. | |
395 | * | |
396 | * @todo We currently run the normalizer from here in a double-fork. This is | |
397 | * unsatisfactory for many reasons: we can't prevent it outliving the main | |
398 | * server and we don't adequately report its exit status. | |
399 | */ | |
5bac5b78 RK |
400 | static int prepare_child(struct queue_entry *q, |
401 | const struct pbgc_params *params, | |
402 | void attribute((unused)) *bgdata) { | |
403 | /* np will be the pipe to disorder-normalize */ | |
404 | int np[2]; | |
405 | if(socketpair(PF_UNIX, SOCK_STREAM, 0, np) < 0) | |
2e9ba080 | 406 | disorder_fatal(errno, "error calling socketpair"); |
5bac5b78 RK |
407 | /* Beware of the Leopard! On OS X 10.5.x, the order of the shutdown |
408 | * calls here DOES MATTER. If you do the SHUT_WR first then the SHUT_RD | |
409 | * fails with "Socket is not connected". I think this is a bug but | |
410 | * provided implementors either don't care about the order or all agree | |
411 | * about the order, choosing the reliable order is an adequate | |
412 | * workaround. */ | |
413 | xshutdown(np[1], SHUT_RD); /* decoder writes to np[1] */ | |
414 | xshutdown(np[0], SHUT_WR); /* normalize reads from np[0] */ | |
415 | blocking(np[0]); | |
416 | blocking(np[1]); | |
417 | /* Start disorder-normalize. We double-fork so that nothing has to wait | |
418 | * for disorder-normalize. */ | |
419 | pid_t npid; | |
420 | if(!(npid = xfork())) { | |
421 | /* Grandchild of disorderd */ | |
422 | if(!xfork()) { | |
423 | /* Great-grandchild of disorderd */ | |
424 | /* Connect to the speaker process */ | |
425 | struct sockaddr_un addr; | |
426 | memset(&addr, 0, sizeof addr); | |
427 | addr.sun_family = AF_UNIX; | |
428 | snprintf(addr.sun_path, sizeof addr.sun_path, | |
429 | "%s/speaker/socket", config->home); | |
430 | int sfd = xsocket(PF_UNIX, SOCK_STREAM, 0); | |
431 | if(connect(sfd, (const struct sockaddr *)&addr, sizeof addr) < 0) | |
2e9ba080 | 432 | disorder_fatal(errno, "connecting to %s", addr.sun_path); |
5bac5b78 RK |
433 | /* Send the ID, with a NATIVE-ENDIAN 32 bit length */ |
434 | uint32_t l = strlen(q->id); | |
435 | if(write(sfd, &l, sizeof l) < 0 | |
436 | || write(sfd, q->id, l) < 0) | |
2e9ba080 | 437 | disorder_fatal(errno, "writing to %s", addr.sun_path); |
5bac5b78 RK |
438 | /* Await the ack */ |
439 | if (read(sfd, &l, 1) < 0) | |
2e9ba080 | 440 | disorder_fatal(errno, "reading ack from %s", addr.sun_path); |
5bac5b78 RK |
441 | /* Plumbing */ |
442 | xdup2(np[0], 0); | |
443 | xdup2(sfd, 1); | |
444 | xclose(np[0]); | |
445 | xclose(np[1]); | |
446 | xclose(sfd); | |
447 | /* TODO stderr shouldn't be redirected for disorder-normalize | |
448 | * (but it should be for play_track() */ | |
449 | execlp("disorder-normalize", "disorder-normalize", | |
450 | log_default == &log_syslog ? "--syslog" : "--no-syslog", | |
451 | "--config", configfile, | |
452 | (char *)0); | |
2e9ba080 | 453 | disorder_fatal(errno, "executing disorder-normalize"); |
5bac5b78 RK |
454 | /* End of the great-grandchild of disorderd */ |
455 | } | |
456 | /* Back in the grandchild of disorderd */ | |
457 | _exit(0); | |
458 | /* End of the grandchild of disorderd */ | |
459 | } | |
460 | /* Back in the child of disorderd */ | |
461 | /* Wait for the grandchild of disordered to finish */ | |
462 | int n; | |
463 | while(waitpid(npid, &n, 0) < 0 && errno == EINTR) | |
464 | ; | |
465 | /* Pass the file descriptor to the driver in an environment | |
466 | * variable. */ | |
467 | char buffer[64]; | |
468 | snprintf(buffer, sizeof buffer, "DISORDER_RAW_FD=%d", np[1]); | |
469 | if(putenv(buffer) < 0) | |
2e9ba080 | 470 | disorder_fatal(errno, "error calling putenv"); |
5bac5b78 RK |
471 | /* Close all the FDs we don't need */ |
472 | xclose(np[0]); | |
473 | /* Start the decoder itself */ | |
474 | play_track(q->pl, | |
475 | params->argv, params->argc, | |
476 | params->rawpath, | |
477 | q->track); | |
478 | return 0; | |
460b9539 | 479 | } |
480 | ||
16fb2830 RK |
481 | /** @brief Abandon a queue entry |
482 | * | |
483 | * Called from c_remove() (but NOT when scratching a track). Only does | |
484 | * anything to raw-format tracks. Terminates the background decoder and tells | |
485 | * the speaker process to cancel the track. | |
486 | */ | |
460b9539 | 487 | void abandon(ev_source attribute((unused)) *ev, |
488 | struct queue_entry *q) { | |
489 | struct speaker_message sm; | |
460b9539 | 490 | |
90b8faa5 RK |
491 | if(q->pid < 0) |
492 | return; /* Not prepared. */ | |
460b9539 | 493 | if((q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) |
494 | return; /* Not a raw player. */ | |
495 | /* Terminate the player. */ | |
90b8faa5 | 496 | kill(-q->pid, config->signal); |
460b9539 | 497 | /* Cancel the track. */ |
498 | memset(&sm, 0, sizeof sm); | |
499 | sm.type = SM_CANCEL; | |
500 | strcpy(sm.id, q->id); | |
84aa9f93 | 501 | speaker_send(speaker_fd, &sm); |
460b9539 | 502 | } |
503 | ||
5bac5b78 RK |
504 | /* Random tracks ------------------------------------------------------------ */ |
505 | ||
49a773eb | 506 | /** @brief Called with a new random track |
59cf25c4 | 507 | * @param ev Event loop |
49a773eb RK |
508 | * @param track Track name |
509 | */ | |
510 | static void chosen_random_track(ev_source *ev, | |
511 | const char *track) { | |
512 | struct queue_entry *q; | |
513 | ||
514 | if(!track) | |
515 | return; | |
516 | /* Add the track to the queue */ | |
7a853280 | 517 | q = queue_add(track, 0, WHERE_END, NULL, origin_random); |
49a773eb RK |
518 | D(("picked %p (%s) at random", (void *)q, q->track)); |
519 | queue_write(); | |
520 | /* Maybe a track can now be played */ | |
521 | play(ev); | |
522 | } | |
523 | ||
524 | /** @brief Maybe add a randomly chosen track | |
525 | * @param ev Event loop | |
16fb2830 RK |
526 | * |
527 | * Picking can take some time so the track will only be added after this | |
528 | * function has returned. | |
49a773eb RK |
529 | */ |
530 | void add_random_track(ev_source *ev) { | |
460b9539 | 531 | struct queue_entry *q; |
459d4402 | 532 | long qlen = 0; |
460b9539 | 533 | |
534 | /* If random play is not enabled then do nothing. */ | |
535 | if(shutting_down || !random_is_enabled()) | |
49a773eb | 536 | return; |
459d4402 | 537 | /* Count how big the queue is */ |
460b9539 | 538 | for(q = qhead.next; q != &qhead; q = q->next) |
459d4402 | 539 | ++qlen; |
49a773eb RK |
540 | /* If it's smaller than the desired size then add a track */ |
541 | if(qlen < config->queue_pad) | |
542 | trackdb_request_random(ev, chosen_random_track); | |
460b9539 | 543 | } |
544 | ||
5bac5b78 RK |
545 | /* Track initiation (part 2) ------------------------------------------------ */ |
546 | ||
16fb2830 RK |
547 | /** @brief Attempt to play something |
548 | * | |
549 | * This is called from numerous locations - whenever it might conceivably have | |
550 | * become possible to play something. | |
551 | */ | |
460b9539 | 552 | void play(ev_source *ev) { |
553 | struct queue_entry *q; | |
554 | int random_enabled = random_is_enabled(); | |
555 | ||
556 | D(("play playing=%p", (void *)playing)); | |
16fb2830 RK |
557 | /* If we're shutting down, or there's something playing, or playing is not |
558 | * enabled, give up now */ | |
460b9539 | 559 | if(shutting_down || playing || !playing_is_enabled()) return; |
49a773eb | 560 | /* See if there's anything to play */ |
460b9539 | 561 | if(qhead.next == &qhead) { |
49a773eb RK |
562 | /* Queue is empty. We could just wait around since there are periodic |
563 | * attempts to add a random track anyway. However they are rarer than | |
564 | * attempts to force a track so we initiate one now. */ | |
565 | add_random_track(ev); | |
16fb2830 RK |
566 | /* chosen_random_track() will call play() when a new random track has been |
567 | * added to the queue. */ | |
49a773eb | 568 | return; |
460b9539 | 569 | } |
49a773eb | 570 | /* There must be at least one track in the queue. */ |
460b9539 | 571 | q = qhead.next; |
2dc2f478 RK |
572 | /* If random play is disabled but the track is a non-adopted random one |
573 | * then don't play it. play() will be called again when random play is | |
574 | * re-enabled. */ | |
575 | if(!random_enabled && q->origin == origin_random) | |
460b9539 | 576 | return; |
577 | D(("taken %p (%s) from queue", (void *)q, q->track)); | |
578 | /* Try to start playing. */ | |
5bac5b78 | 579 | switch(start(ev, q)) { |
460b9539 | 580 | case START_HARDFAIL: |
581 | if(q == qhead.next) { | |
582 | queue_remove(q, 0); /* Abandon this track. */ | |
583 | queue_played(q); | |
584 | recent_write(); | |
585 | } | |
49a773eb RK |
586 | /* Oh well, try the next one */ |
587 | play(ev); | |
460b9539 | 588 | break; |
589 | case START_SOFTFAIL: | |
49a773eb | 590 | /* We'll try the same track again shortly. */ |
460b9539 | 591 | break; |
592 | case START_OK: | |
16fb2830 | 593 | /* Remove from the queue */ |
460b9539 | 594 | if(q == qhead.next) { |
595 | queue_remove(q, 0); | |
596 | queue_write(); | |
597 | } | |
16fb2830 | 598 | /* It's become the playing track */ |
460b9539 | 599 | playing = q; |
4265e5d3 | 600 | xtime(&playing->played); |
460b9539 | 601 | playing->state = playing_started; |
602 | notify_play(playing->track, playing->submitter); | |
603 | eventlog("playing", playing->track, | |
604 | playing->submitter ? playing->submitter : (const char *)0, | |
605 | (const char *)0); | |
606 | /* Maybe add a random track. */ | |
49a773eb | 607 | add_random_track(ev); |
460b9539 | 608 | /* If there is another track in the queue prepare it now. This could |
609 | * potentially be a just-added random track. */ | |
610 | if(qhead.next != &qhead) | |
611 | prepare(ev, qhead.next); | |
612 | break; | |
613 | } | |
614 | } | |
615 | ||
5bac5b78 RK |
616 | /* Miscelleneous ------------------------------------------------------------ */ |
617 | ||
16fb2830 | 618 | /** @brief Return true if play is enabled */ |
460b9539 | 619 | int playing_is_enabled(void) { |
620 | const char *s = trackdb_get_global("playing"); | |
621 | ||
622 | return !s || !strcmp(s, "yes"); | |
623 | } | |
624 | ||
16fb2830 | 625 | /** @brief Enable play */ |
460b9539 | 626 | void enable_playing(const char *who, ev_source *ev) { |
627 | trackdb_set_global("playing", "yes", who); | |
628 | /* Add a random track if necessary. */ | |
49a773eb | 629 | add_random_track(ev); |
460b9539 | 630 | play(ev); |
631 | } | |
632 | ||
16fb2830 | 633 | /** @brief Disable play */ |
460b9539 | 634 | void disable_playing(const char *who) { |
635 | trackdb_set_global("playing", "no", who); | |
636 | } | |
637 | ||
16fb2830 | 638 | /** @brief Return true if random play is enabled */ |
460b9539 | 639 | int random_is_enabled(void) { |
640 | const char *s = trackdb_get_global("random-play"); | |
641 | ||
642 | return !s || !strcmp(s, "yes"); | |
643 | } | |
644 | ||
16fb2830 | 645 | /** @brief Enable random play */ |
460b9539 | 646 | void enable_random(const char *who, ev_source *ev) { |
647 | trackdb_set_global("random-play", "yes", who); | |
49a773eb | 648 | add_random_track(ev); |
460b9539 | 649 | play(ev); |
650 | } | |
651 | ||
16fb2830 | 652 | /** @brief Disable random play */ |
460b9539 | 653 | void disable_random(const char *who) { |
654 | trackdb_set_global("random-play", "no", who); | |
655 | } | |
656 | ||
5bac5b78 RK |
657 | /* Scratching --------------------------------------------------------------- */ |
658 | ||
16fb2830 | 659 | /** @brief Scratch a track |
c0f52b2c RK |
660 | * @param who User responsible (or NULL) |
661 | * @param id Track ID (or NULL for current) | |
16fb2830 | 662 | */ |
460b9539 | 663 | void scratch(const char *who, const char *id) { |
664 | struct queue_entry *q; | |
665 | struct speaker_message sm; | |
460b9539 | 666 | |
667 | D(("scratch playing=%p state=%d id=%s playing->id=%s", | |
668 | (void *)playing, | |
669 | playing ? playing->state : 0, | |
670 | id ? id : "(none)", | |
671 | playing ? playing->id : "(none)")); | |
16fb2830 RK |
672 | /* There must be a playing track; it must be in a scratchable state; if a |
673 | * specific ID was mentioned it must be that track. */ | |
460b9539 | 674 | if(playing |
675 | && (playing->state == playing_started | |
676 | || playing->state == playing_paused) | |
677 | && (!id | |
678 | || !strcmp(id, playing->id))) { | |
16fb2830 | 679 | /* Update state (for the benefit of the 'recent' list) */ |
460b9539 | 680 | playing->state = playing_scratched; |
681 | playing->scratched = who ? xstrdup(who) : 0; | |
16fb2830 | 682 | /* Find the player and kill the whole process group */ |
90b8faa5 RK |
683 | if(playing->pid >= 0) { |
684 | D(("kill -%d -%lu", config->signal, (unsigned long)playing->pid)); | |
685 | kill(-playing->pid, config->signal); | |
16fb2830 RK |
686 | } |
687 | /* Tell the speaker, if we think it'll care */ | |
460b9539 | 688 | if((playing->type & DISORDER_PLAYER_TYPEMASK) == DISORDER_PLAYER_RAW) { |
689 | memset(&sm, 0, sizeof sm); | |
690 | sm.type = SM_CANCEL; | |
691 | strcpy(sm.id, playing->id); | |
84aa9f93 | 692 | speaker_send(speaker_fd, &sm); |
460b9539 | 693 | D(("sending SM_CANCEL for %s", playing->id)); |
694 | } | |
695 | /* put a scratch track onto the front of the queue (but don't | |
696 | * bother if playing is disabled) */ | |
697 | if(playing_is_enabled() && config->scratch.n) { | |
698 | int r = rand() * (double)config->scratch.n / (RAND_MAX + 1.0); | |
7a853280 RK |
699 | q = queue_add(config->scratch.s[r], who, WHERE_START, NULL, |
700 | origin_scratch); | |
460b9539 | 701 | } |
702 | notify_scratch(playing->track, playing->submitter, who, | |
4265e5d3 | 703 | xtime(0) - playing->played); |
460b9539 | 704 | } |
705 | } | |
706 | ||
5bac5b78 RK |
707 | /* Server termination ------------------------------------------------------- */ |
708 | ||
709 | /** @brief Called from quit() to tear down everything belonging to this file */ | |
460b9539 | 710 | void quitting(ev_source *ev) { |
711 | struct queue_entry *q; | |
460b9539 | 712 | |
713 | /* Don't start anything new */ | |
714 | shutting_down = 1; | |
715 | /* Shut down the current player */ | |
716 | if(playing) { | |
90b8faa5 RK |
717 | if(playing->pid >= 0) |
718 | kill(-playing->pid, config->signal); | |
460b9539 | 719 | playing->state = playing_quitting; |
720 | finished(0); | |
721 | } | |
90b8faa5 | 722 | /* Zap any background decoders that are going */ |
460b9539 | 723 | for(q = qhead.next; q != &qhead; q = q->next) |
90b8faa5 RK |
724 | if(q->pid >= 0) { |
725 | D(("kill -%d %lu", config->signal, (unsigned long)q->pid)); | |
726 | kill(-q->pid, config->signal); | |
16fb2830 | 727 | } |
460b9539 | 728 | /* Don't need the speaker any more */ |
729 | ev_fd_cancel(ev, ev_read, speaker_fd); | |
730 | xclose(speaker_fd); | |
731 | } | |
732 | ||
5bac5b78 RK |
733 | /* Pause and resume --------------------------------------------------------- */ |
734 | ||
16fb2830 | 735 | /** @brief Pause the playing track */ |
460b9539 | 736 | int pause_playing(const char *who) { |
737 | struct speaker_message sm; | |
738 | long played; | |
739 | ||
740 | /* Can't pause if already paused or if nothing playing. */ | |
741 | if(!playing || paused) return 0; | |
742 | switch(playing->type & DISORDER_PLAYER_TYPEMASK) { | |
743 | case DISORDER_PLAYER_STANDALONE: | |
744 | if(!(playing->type & DISORDER_PLAYER_PAUSES)) { | |
745 | default: | |
2e9ba080 | 746 | disorder_error(0, "cannot pause because player is not powerful enough"); |
460b9539 | 747 | return -1; |
748 | } | |
749 | if(play_pause(playing->pl, &played, playing->data)) { | |
2e9ba080 | 750 | disorder_error(0, "player indicates it cannot pause"); |
460b9539 | 751 | return -1; |
752 | } | |
4265e5d3 | 753 | xtime(&playing->lastpaused); |
460b9539 | 754 | playing->uptopause = played; |
755 | playing->lastresumed = 0; | |
756 | break; | |
757 | case DISORDER_PLAYER_RAW: | |
758 | memset(&sm, 0, sizeof sm); | |
759 | sm.type = SM_PAUSE; | |
84aa9f93 | 760 | speaker_send(speaker_fd, &sm); |
460b9539 | 761 | break; |
762 | } | |
2e9ba080 RK |
763 | if(who) |
764 | disorder_info("paused by %s", who); | |
460b9539 | 765 | notify_pause(playing->track, who); |
766 | paused = 1; | |
767 | if(playing->state == playing_started) | |
768 | playing->state = playing_paused; | |
769 | eventlog("state", "pause", (char *)0); | |
770 | return 0; | |
771 | } | |
772 | ||
16fb2830 | 773 | /** @brief Resume playing after a pause */ |
460b9539 | 774 | void resume_playing(const char *who) { |
775 | struct speaker_message sm; | |
776 | ||
777 | if(!paused) return; | |
778 | paused = 0; | |
779 | if(!playing) return; | |
780 | switch(playing->type & DISORDER_PLAYER_TYPEMASK) { | |
781 | case DISORDER_PLAYER_STANDALONE: | |
c458dd3d | 782 | if(!(playing->type & DISORDER_PLAYER_PAUSES)) { |
460b9539 | 783 | default: |
784 | /* Shouldn't happen */ | |
785 | return; | |
786 | } | |
787 | play_resume(playing->pl, playing->data); | |
4265e5d3 | 788 | xtime(&playing->lastresumed); |
460b9539 | 789 | break; |
790 | case DISORDER_PLAYER_RAW: | |
791 | memset(&sm, 0, sizeof sm); | |
792 | sm.type = SM_RESUME; | |
84aa9f93 | 793 | speaker_send(speaker_fd, &sm); |
460b9539 | 794 | break; |
795 | } | |
2e9ba080 | 796 | if(who) disorder_info("resumed by %s", who); |
460b9539 | 797 | notify_resume(playing->track, who); |
798 | if(playing->state == playing_paused) | |
799 | playing->state = playing_started; | |
800 | eventlog("state", "resume", (char *)0); | |
801 | } | |
802 | ||
803 | /* | |
804 | Local Variables: | |
805 | c-basic-offset:2 | |
806 | comment-column:40 | |
807 | fill-column:79 | |
16fb2830 | 808 | indent-tabs-mode:nil |
460b9539 | 809 | End: |
810 | */ |