Commit | Line | Data |
---|---|---|
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 | |
20 | */ | |
460b9539 | 21 | |
05b75f8d | 22 | #include "disorder-server.h" |
460b9539 | 23 | #include <ao/ao.h> |
460b9539 | 24 | |
25 | #define SPEAKER "disorder-speaker" | |
26 | ||
16fb2830 | 27 | /** @brief The current playing track or NULL */ |
460b9539 | 28 | struct queue_entry *playing; |
16fb2830 RK |
29 | |
30 | /** @brief Set when paused */ | |
460b9539 | 31 | int paused; |
32 | ||
33 | static void finished(ev_source *ev); | |
34 | ||
16fb2830 | 35 | /** @brief File descriptor of our end of the socket to the speaker */ |
460b9539 | 36 | static int speaker_fd = -1; |
16fb2830 | 37 | |
16fb2830 | 38 | /** @brief Set when shutting down */ |
460b9539 | 39 | static int shutting_down; |
40 | ||
16fb2830 RK |
41 | /** @brief Called when speaker process terminates |
42 | * | |
43 | * Currently kills of DisOrder completely. A future version could terminate | |
44 | * the speaker when nothing was going on, or recover from failures, though any | |
45 | * tracks with decoders already started would need to have them restarted. | |
46 | */ | |
460b9539 | 47 | static int speaker_terminated(ev_source attribute((unused)) *ev, |
48 | pid_t attribute((unused)) pid, | |
49 | int attribute((unused)) status, | |
50 | const struct rusage attribute((unused)) *rusage, | |
51 | void attribute((unused)) *u) { | |
0213d16c | 52 | fatal(0, "speaker subprocess %s", |
2a6c7b79 | 53 | wstat(status)); |
460b9539 | 54 | } |
55 | ||
16fb2830 | 56 | /** @brief Called when we get a message from the speaker process */ |
460b9539 | 57 | static int speaker_readable(ev_source *ev, int fd, |
58 | void attribute((unused)) *u) { | |
59 | struct speaker_message sm; | |
84aa9f93 | 60 | int ret = speaker_recv(fd, &sm); |
460b9539 | 61 | |
62 | if(ret < 0) return 0; /* EAGAIN */ | |
63 | if(!ret) { /* EOF */ | |
64 | ev_fd_cancel(ev, ev_read, fd); | |
65 | return 0; | |
66 | } | |
67 | switch(sm.type) { | |
68 | case SM_PAUSED: | |
69 | /* track ID is paused, DATA seconds played */ | |
70 | D(("SM_PAUSED %s %ld", sm.id, sm.data)); | |
71 | playing->sofar = sm.data; | |
72 | break; | |
819f5988 RK |
73 | case SM_FINISHED: /* scratched the playing track */ |
74 | case SM_STILLBORN: /* scratched too early */ | |
75 | case SM_UNKNOWN: /* scratched WAY too early */ | |
2b2a5fed RK |
76 | if(playing && !strcmp(sm.id, playing->id)) |
77 | finished(ev); | |
78 | break; | |
460b9539 | 79 | case SM_PLAYING: |
80 | /* track ID is playing, DATA seconds played */ | |
81 | D(("SM_PLAYING %s %ld", sm.id, sm.data)); | |
82 | playing->sofar = sm.data; | |
83 | break; | |
84 | default: | |
16fb2830 | 85 | error(0, "unknown speaker message type %d", sm.type); |
460b9539 | 86 | } |
87 | return 0; | |
88 | } | |
89 | ||
16fb2830 | 90 | /** @brief Initialize the speaker process */ |
460b9539 | 91 | void speaker_setup(ev_source *ev) { |
4387f694 | 92 | int sp[2]; |
460b9539 | 93 | pid_t pid; |
937be4c0 | 94 | struct speaker_message sm; |
460b9539 | 95 | |
96 | if(socketpair(PF_UNIX, SOCK_DGRAM, 0, sp) < 0) | |
97 | fatal(errno, "error calling socketpair"); | |
460b9539 | 98 | if(!(pid = xfork())) { |
99 | exitfn = _exit; | |
100 | ev_signal_atfork(ev); | |
101 | xdup2(sp[0], 0); | |
102 | xdup2(sp[0], 1); | |
103 | xclose(sp[0]); | |
104 | xclose(sp[1]); | |
460b9539 | 105 | signal(SIGPIPE, SIG_DFL); |
106 | #if 0 | |
107 | execlp("valgrind", "valgrind", SPEAKER, "--config", configfile, | |
0ca6d097 RK |
108 | debugging ? "--debug" : "--no-debug", |
109 | log_default == &log_syslog ? "--syslog" : "--no-syslog", | |
110 | (char *)0); | |
460b9539 | 111 | #else |
112 | execlp(SPEAKER, SPEAKER, "--config", configfile, | |
0ca6d097 RK |
113 | debugging ? "--debug" : "--no-debug", |
114 | log_default == &log_syslog ? "--syslog" : "--no-syslog", | |
115 | (char *)0); | |
460b9539 | 116 | #endif |
117 | fatal(errno, "error invoking %s", SPEAKER); | |
118 | } | |
119 | ev_child(ev, pid, 0, speaker_terminated, 0); | |
120 | speaker_fd = sp[1]; | |
121 | xclose(sp[0]); | |
122 | cloexec(speaker_fd); | |
937be4c0 RK |
123 | /* Wait for the speaker to be ready */ |
124 | speaker_recv(speaker_fd, &sm); | |
125 | nonblock(speaker_fd); | |
31e2a93e RK |
126 | if(ev_fd(ev, ev_read, speaker_fd, speaker_readable, 0, "speaker read") < 0) |
127 | fatal(0, "error registering speaker socket fd"); | |
460b9539 | 128 | } |
129 | ||
16fb2830 | 130 | /** @brief Tell the speaker to reload its configuration */ |
460b9539 | 131 | void speaker_reload(void) { |
132 | struct speaker_message sm; | |
133 | ||
134 | memset(&sm, 0, sizeof sm); | |
135 | sm.type = SM_RELOAD; | |
84aa9f93 | 136 | speaker_send(speaker_fd, &sm); |
460b9539 | 137 | } |
138 | ||
16fb2830 RK |
139 | /** @brief Called when the currently playing track finishes playing |
140 | * @param ev Event loop or NULL | |
141 | * | |
142 | * There are three places this is called from: | |
143 | * | |
144 | * 1) speaker_readable(), when the speaker tells us the playing track finished. | |
145 | * (Technically the speaker lies a little to arrange for gapless play.) | |
146 | * | |
147 | * 2) player_finished(), when the player for a non-raw track (i.e. one that | |
148 | * does not use the speaker) finishes. | |
149 | * | |
150 | * 3) quitting(), after signalling the decoder or player but possible before it | |
151 | * has actually terminated. In this case @p ev is NULL, inhibiting any further | |
152 | * attempt to play anything. | |
153 | */ | |
460b9539 | 154 | static void finished(ev_source *ev) { |
155 | D(("finished playing=%p", (void *)playing)); | |
156 | if(!playing) | |
157 | return; | |
158 | if(playing->state != playing_scratched) | |
159 | notify_not_scratched(playing->track, playing->submitter); | |
160 | switch(playing->state) { | |
161 | case playing_ok: | |
162 | eventlog("completed", playing->track, (char *)0); | |
163 | break; | |
164 | case playing_scratched: | |
165 | eventlog("scratched", playing->track, playing->scratched, (char *)0); | |
166 | break; | |
167 | case playing_failed: | |
168 | eventlog("failed", playing->track, wstat(playing->wstat), (char *)0); | |
169 | break; | |
170 | default: | |
171 | break; | |
172 | } | |
173 | queue_played(playing); | |
174 | recent_write(); | |
460b9539 | 175 | playing = 0; |
49a773eb RK |
176 | /* Try to play something else */ |
177 | /* TODO re-support config->gap? */ | |
178 | if(ev) | |
179 | play(ev); | |
460b9539 | 180 | } |
181 | ||
16fb2830 RK |
182 | /** @brief Called when a player or decoder process terminates |
183 | * | |
184 | * This is called when a decoder process terminates (which might actually be | |
185 | * some time before the speaker reports it as finished) or when a non-raw | |
186 | * (i.e. non-speaker) player terminates. In the latter case it's imaginable | |
187 | * that the OS has buffered the last few samples. | |
188 | * | |
189 | */ | |
460b9539 | 190 | static int player_finished(ev_source *ev, |
191 | pid_t pid, | |
192 | int status, | |
193 | const struct rusage attribute((unused)) *rusage, | |
194 | void *u) { | |
195 | struct queue_entry *q = u; | |
196 | ||
197 | D(("player_finished pid=%lu status=%#x", | |
198 | (unsigned long)pid, (unsigned)status)); | |
199 | /* Record that this PID is dead. If we killed the track we might know this | |
200 | * already, but also it might have exited or crashed. Either way we don't | |
201 | * want to end up signalling it. */ | |
90b8faa5 | 202 | q->pid = -1; |
460b9539 | 203 | switch(q->state) { |
204 | case playing_unplayed: | |
205 | case playing_random: | |
84aa9f93 | 206 | /* If this was a pre-prepared track then either it failed or we |
16fb2830 RK |
207 | * deliberately stopped it: it might have been removed from the queue, or |
208 | * moved down the queue, or the speaker might be on a break. So we leave | |
209 | * it state alone for future use. | |
210 | */ | |
460b9539 | 211 | break; |
212 | default: | |
213 | /* We actually started playing this track. */ | |
214 | if(status) { | |
16fb2830 | 215 | /* Don't override 'scratched' with 'failed'. */ |
460b9539 | 216 | if(q->state != playing_scratched) |
217 | q->state = playing_failed; | |
218 | } else | |
219 | q->state = playing_ok; | |
220 | break; | |
221 | } | |
222 | /* Regardless we always report and record the status and do cleanup for | |
223 | * prefork calls. */ | |
224 | if(status) | |
225 | error(0, "player for %s %s", q->track, wstat(status)); | |
226 | if(q->type & DISORDER_PLAYER_PREFORK) | |
227 | play_cleanup(q->pl, q->data); | |
228 | q->wstat = status; | |
229 | /* If this actually was the current track, and does not use the speaker | |
230 | * process, then it must have finished. For raw-output players we will get a | |
231 | * separate notification from the speaker process. */ | |
232 | if(q == playing | |
233 | && (q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) | |
234 | finished(ev); | |
235 | return 0; | |
236 | } | |
237 | ||
16fb2830 | 238 | /** @brief Find the player for @p q */ |
460b9539 | 239 | static int find_player(const struct queue_entry *q) { |
240 | int n; | |
241 | ||
242 | for(n = 0; n < config->player.n; ++n) | |
243 | if(fnmatch(config->player.s[n].s[0], q->track, 0) == 0) | |
244 | break; | |
245 | if(n >= config->player.n) | |
246 | return -1; | |
247 | else | |
248 | return n; | |
249 | } | |
250 | ||
251 | /* Return values from start() */ | |
16fb2830 RK |
252 | #define START_OK 0 /**< @brief Succeeded. */ |
253 | #define START_HARDFAIL 1 /**< @brief Track is broken. */ | |
254 | #define START_SOFTFAIL 2 /**< @brief Track OK, system (temporarily?) broken */ | |
460b9539 | 255 | |
84aa9f93 RK |
256 | /** @brief Play or prepare @p q |
257 | * @param ev Event loop | |
258 | * @param q Track to play/prepare | |
259 | * @param prepare_only If true, only prepares track | |
3149c1e2 | 260 | * @return @ref START_OK, @ref START_HARDFAIL or @ref START_SOFTFAIL |
16fb2830 RK |
261 | * |
262 | * TODO: probably ought to be split up into separate prepare() and start() | |
263 | * operations, the latter calling the former if necessary and perhaps the two | |
264 | * sharing some subprocess creation logic. | |
265 | * | |
266 | * "Preparing" a track means starting a background decoder and connecting it to | |
267 | * the speaker process. Obviously this only applies to raw-format | |
268 | * (i.e. speaker-using) players. | |
84aa9f93 | 269 | */ |
460b9539 | 270 | static int start(ev_source *ev, |
271 | struct queue_entry *q, | |
84aa9f93 | 272 | int prepare_only) { |
460b9539 | 273 | int n, lfd; |
274 | const char *p; | |
84aa9f93 | 275 | int np[2], sfd; |
460b9539 | 276 | struct speaker_message sm; |
277 | char buffer[64]; | |
278 | int optc; | |
279 | ao_sample_format format; | |
280 | ao_device *device; | |
281 | int retries; | |
282 | struct timespec ts; | |
283 | const char *waitdevice = 0; | |
284 | const char *const *optv; | |
90b8faa5 | 285 | pid_t npid; |
84aa9f93 RK |
286 | struct sockaddr_un addr; |
287 | uint32_t l; | |
460b9539 | 288 | |
289 | memset(&sm, 0, sizeof sm); | |
84aa9f93 | 290 | D(("start %s %d", q->id, prepare_only)); |
66bb2e02 | 291 | if(q->prepared) { |
16fb2830 | 292 | /* The track is already prepared */ |
66bb2e02 RK |
293 | if(!prepare_only) { |
294 | /* We want to run it, since it's prepared the answer is to tell the | |
295 | * speaker to set it off */ | |
296 | strcpy(sm.id, q->id); | |
297 | sm.type = SM_PLAY; | |
298 | speaker_send(speaker_fd, &sm); | |
299 | D(("sent SM_PLAY for %s", sm.id)); | |
300 | } | |
460b9539 | 301 | return START_OK; |
302 | } | |
303 | /* Find the player plugin. */ | |
304 | if((n = find_player(q)) < 0) return START_HARDFAIL; | |
305 | if(!(q->pl = open_plugin(config->player.s[n].s[1], 0))) | |
306 | return START_HARDFAIL; | |
307 | q->type = play_get_type(q->pl); | |
308 | /* Can't prepare non-raw tracks. */ | |
84aa9f93 | 309 | if(prepare_only |
460b9539 | 310 | && (q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) |
311 | return START_OK; | |
16fb2830 RK |
312 | /* Call the prefork function in the player module. None of the built-in |
313 | * modules use this so it's not well tested, unfortunately. */ | |
460b9539 | 314 | p = trackdb_rawpath(q->track); |
315 | if(q->type & DISORDER_PLAYER_PREFORK) | |
316 | if(!(q->data = play_prefork(q->pl, p))) { | |
317 | error(0, "prefork function for %s failed", q->track); | |
318 | return START_HARDFAIL; | |
319 | } | |
16fb2830 RK |
320 | /* Capture the player/decoder's stderr and feed it into our logs. |
321 | * | |
322 | * Use the second arg as the tag if available (it's probably a command name), | |
460b9539 | 323 | * otherwise the module name. */ |
e99d42b1 | 324 | if(!isatty(2)) |
325 | lfd = logfd(ev, (config->player.s[n].s[2] | |
326 | ? config->player.s[n].s[2] : config->player.s[n].s[1])); | |
327 | else | |
328 | lfd = -1; | |
16fb2830 | 329 | /* Parse player arguments */ |
460b9539 | 330 | optc = config->player.s[n].n - 2; |
331 | optv = (void *)&config->player.s[n].s[2]; | |
332 | while(optc > 0 && optv[0][0] == '-') { | |
333 | if(!strcmp(optv[0], "--")) { | |
334 | ++optv; | |
335 | --optc; | |
336 | break; | |
337 | } | |
338 | if(!strcmp(optv[0], "--wait-for-device") | |
339 | || !strncmp(optv[0], "--wait-for-device=", 18)) { | |
340 | if((waitdevice = strchr(optv[0], '='))) { | |
341 | ++waitdevice; | |
342 | } else | |
343 | waitdevice = ""; /* use default */ | |
344 | ++optv; | |
345 | --optc; | |
346 | } else { | |
347 | error(0, "unknown option %s", optv[0]); | |
348 | return START_HARDFAIL; | |
349 | } | |
350 | } | |
16fb2830 | 351 | /* Create the subprocess */ |
90b8faa5 | 352 | switch(q->pid = fork()) { |
16fb2830 RK |
353 | case 0: |
354 | /* Child of disorderd */ | |
460b9539 | 355 | exitfn = _exit; |
ba3d1d36 | 356 | progname = "disorderd-fork"; |
460b9539 | 357 | ev_signal_atfork(ev); |
358 | signal(SIGPIPE, SIG_DFL); | |
16fb2830 | 359 | /* Send our log output to DisOrder's logs */ |
e99d42b1 | 360 | if(lfd != -1) { |
361 | xdup2(lfd, 1); | |
362 | xdup2(lfd, 2); | |
363 | xclose(lfd); /* tidy up */ | |
364 | } | |
16fb2830 | 365 | /* Create a new process group, ID = child PID */ |
460b9539 | 366 | setpgid(0, 0); |
367 | if((q->type & DISORDER_PLAYER_TYPEMASK) == DISORDER_PLAYER_RAW) { | |
84aa9f93 RK |
368 | /* "Raw" format players always have their output send down a pipe |
369 | * to the disorder-normalize process. This will connect to the | |
370 | * speaker process to actually play the audio data. | |
6d2d327c RK |
371 | */ |
372 | /* np will be the pipe to disorder-normalize */ | |
373 | if(socketpair(PF_UNIX, SOCK_STREAM, 0, np) < 0) | |
374 | fatal(errno, "error calling socketpair"); | |
ba3d1d36 RK |
375 | /* Beware of the Leopard! On OS X 10.5.x, the order of the shutdown |
376 | * calls here DOES MATTER. If you do the SHUT_WR first then the SHUT_RD | |
af7a85b7 | 377 | * fails with "Socket is not connected". I think this is a bug but |
ba3d1d36 RK |
378 | * provided implementors either don't care about the order or all agree |
379 | * about the order, choosing the reliable order is an adequate | |
380 | * workaround. */ | |
6d2d327c | 381 | xshutdown(np[1], SHUT_RD); /* decoder writes to np[1] */ |
ba3d1d36 | 382 | xshutdown(np[0], SHUT_WR); /* normalize reads from np[0] */ |
937be4c0 RK |
383 | blocking(np[0]); |
384 | blocking(np[1]); | |
16fb2830 RK |
385 | /* Start disorder-normalize. We double-fork so that nothing has to wait |
386 | * for disorder-normalize. */ | |
6d2d327c | 387 | if(!(npid = xfork())) { |
16fb2830 | 388 | /* Grandchild of disorderd */ |
6d2d327c | 389 | if(!xfork()) { |
16fb2830 | 390 | /* Great-grandchild of disorderd */ |
84aa9f93 RK |
391 | /* Connect to the speaker process */ |
392 | memset(&addr, 0, sizeof addr); | |
393 | addr.sun_family = AF_UNIX; | |
394 | snprintf(addr.sun_path, sizeof addr.sun_path, | |
85cb23d7 | 395 | "%s/speaker/socket", config->home); |
84aa9f93 | 396 | sfd = xsocket(PF_UNIX, SOCK_STREAM, 0); |
dc450d30 | 397 | if(connect(sfd, (const struct sockaddr *)&addr, sizeof addr) < 0) |
84aa9f93 | 398 | fatal(errno, "connecting to %s", addr.sun_path); |
16fb2830 | 399 | /* Send the ID, with a NATIVE-ENDIAN 32 bit length */ |
84aa9f93 RK |
400 | l = strlen(q->id); |
401 | if(write(sfd, &l, sizeof l) < 0 | |
402 | || write(sfd, q->id, l) < 0) | |
403 | fatal(errno, "writing to %s", addr.sun_path); | |
404 | /* Await the ack */ | |
918393ff RK |
405 | if (read(sfd, &l, 1) < 0) |
406 | fatal(errno, "reading ack from %s", addr.sun_path); | |
84aa9f93 | 407 | /* Plumbing */ |
6d2d327c | 408 | xdup2(np[0], 0); |
84aa9f93 | 409 | xdup2(sfd, 1); |
6d2d327c RK |
410 | xclose(np[0]); |
411 | xclose(np[1]); | |
84aa9f93 RK |
412 | xclose(sfd); |
413 | /* Ask the speaker to actually start playing the track; we do it here | |
16fb2830 RK |
414 | * so it's definitely after ack. |
415 | * | |
416 | * This is actually insufficient. If the track is prepared and then | |
417 | * very shortly afterwards played, then the race we're trying to | |
418 | * avoid here will still exist. So either the speaker must cope with | |
419 | * SM_PLAY before connection has arrived (in which case we might as | |
420 | * well move the SM_PLAY somewhere saner) or we must do more work | |
421 | * here to avoid the race. | |
422 | * | |
423 | * In fact the current speaker can indeed cope with SM_PLAY before | |
424 | * the connection arrives. So this code can probably be moved | |
425 | * somewhere saner in due course. TODO! | |
426 | */ | |
84aa9f93 RK |
427 | if(!prepare_only) { |
428 | strcpy(sm.id, q->id); | |
429 | sm.type = SM_PLAY; | |
430 | speaker_send(speaker_fd, &sm); | |
431 | D(("sent SM_PLAY for %s", sm.id)); | |
432 | } | |
4387f694 RK |
433 | /* TODO stderr shouldn't be redirected for disorder-normalize |
434 | * (but it should be for play_track() */ | |
b44ca625 RK |
435 | execlp("disorder-normalize", "disorder-normalize", |
436 | log_default == &log_syslog ? "--syslog" : "--no-syslog", | |
816e6088 | 437 | "--config", configfile, |
b44ca625 | 438 | (char *)0); |
6d2d327c | 439 | fatal(errno, "executing disorder-normalize"); |
16fb2830 | 440 | /* End of the great-grandchild of disorderd */ |
6d2d327c | 441 | } |
16fb2830 | 442 | /* Back in the grandchild of disorderd */ |
6d2d327c | 443 | _exit(0); |
16fb2830 | 444 | /* End of the grandchild of disorderd */ |
6d2d327c | 445 | } |
16fb2830 RK |
446 | /* Back in the child of disorderd */ |
447 | /* Wait for the grandchild of disordered to finish */ | |
84aa9f93 RK |
448 | while(waitpid(npid, &n, 0) < 0 && errno == EINTR) |
449 | ; | |
460b9539 | 450 | /* Pass the file descriptor to the driver in an environment |
451 | * variable. */ | |
6d2d327c | 452 | snprintf(buffer, sizeof buffer, "DISORDER_RAW_FD=%d", np[1]); |
460b9539 | 453 | if(putenv(buffer) < 0) |
454 | fatal(errno, "error calling putenv"); | |
6d2d327c | 455 | /* Close all the FDs we don't need */ |
6d2d327c | 456 | xclose(np[0]); |
460b9539 | 457 | } |
16fb2830 RK |
458 | /* Wait for a device to clear. This ugliness is now deprecated and will |
459 | * eventually be removed. */ | |
460b9539 | 460 | if(waitdevice) { |
461 | ao_initialize(); | |
462 | if(*waitdevice) { | |
463 | n = ao_driver_id(waitdevice); | |
464 | if(n == -1) | |
465 | fatal(0, "invalid libao driver: %s", optv[0]); | |
466 | } else | |
467 | n = ao_default_driver_id(); | |
468 | /* Make up a format. */ | |
469 | memset(&format, 0, sizeof format); | |
470 | format.bits = 8; | |
471 | format.rate = 44100; | |
472 | format.channels = 1; | |
473 | format.byte_format = AO_FMT_NATIVE; | |
474 | retries = 20; | |
475 | ts.tv_sec = 0; | |
476 | ts.tv_nsec = 100000000; /* 0.1s */ | |
477 | while((device = ao_open_live(n, &format, 0)) == 0 && retries-- > 0) | |
478 | nanosleep(&ts, 0); | |
479 | if(device) | |
480 | ao_close(device); | |
481 | } | |
482 | play_track(q->pl, | |
483 | optv, optc, | |
484 | p, | |
485 | q->track); | |
16fb2830 | 486 | /* End of child of disorderd */ |
460b9539 | 487 | _exit(0); |
16fb2830 RK |
488 | case -1: |
489 | /* Back in disorderd (child could not be created) */ | |
460b9539 | 490 | error(errno, "error calling fork"); |
491 | if(q->type & DISORDER_PLAYER_PREFORK) | |
492 | play_cleanup(q->pl, q->data); /* else would leak */ | |
e99d42b1 | 493 | if(lfd != -1) |
494 | xclose(lfd); | |
460b9539 | 495 | return START_SOFTFAIL; |
496 | } | |
16fb2830 | 497 | /* Back in disorderd (child was created) */ |
16fb2830 RK |
498 | /* This track is prepared. (Non-raw tracks are by implication prepared as |
499 | * soon as they are playing, but really the question doesn't make much sense | |
500 | * for them.) */ | |
66bb2e02 | 501 | q->prepared = 1; |
e99d42b1 | 502 | if(lfd != -1) |
503 | xclose(lfd); | |
16fb2830 RK |
504 | /* Set the child's process group ID. |
505 | * | |
506 | * But wait, didn't we already set it in the child? Yes, but it's possible | |
507 | * that we'll need to address it by process group ID before it gets that far, | |
508 | * so we set it here too. One or the other may fail but as long as one | |
509 | * succeeds that's fine. | |
510 | */ | |
90b8faa5 | 511 | setpgid(q->pid, q->pid); |
16fb2830 | 512 | /* Ask the event loop to tell us when the child terminates */ |
90b8faa5 RK |
513 | ev_child(ev, q->pid, 0, player_finished, q); |
514 | D(("player subprocess ID %lu", (unsigned long)q->pid)); | |
460b9539 | 515 | return START_OK; |
516 | } | |
517 | ||
16fb2830 RK |
518 | /** @brief Prepare a track for later play |
519 | * | |
520 | * Only applies to raw-format (speaker-using) players. | |
521 | */ | |
460b9539 | 522 | int prepare(ev_source *ev, |
523 | struct queue_entry *q) { | |
524 | int n; | |
525 | ||
90b8faa5 RK |
526 | /* If there's a decoder (or player!) going we do nothing */ |
527 | if(q->pid >= 0) | |
528 | return 0; | |
460b9539 | 529 | /* Find the player plugin */ |
460b9539 | 530 | if((n = find_player(q)) < 0) return -1; /* No player */ |
531 | q->pl = open_plugin(config->player.s[n].s[1], 0); /* No player */ | |
532 | q->type = play_get_type(q->pl); | |
533 | if((q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) | |
534 | return 0; /* Not a raw player */ | |
84aa9f93 | 535 | return start(ev, q, 1/*prepare_only*/); /* Prepare it */ |
460b9539 | 536 | } |
537 | ||
16fb2830 RK |
538 | /** @brief Abandon a queue entry |
539 | * | |
540 | * Called from c_remove() (but NOT when scratching a track). Only does | |
541 | * anything to raw-format tracks. Terminates the background decoder and tells | |
542 | * the speaker process to cancel the track. | |
543 | */ | |
460b9539 | 544 | void abandon(ev_source attribute((unused)) *ev, |
545 | struct queue_entry *q) { | |
546 | struct speaker_message sm; | |
460b9539 | 547 | |
90b8faa5 RK |
548 | if(q->pid < 0) |
549 | return; /* Not prepared. */ | |
460b9539 | 550 | if((q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) |
551 | return; /* Not a raw player. */ | |
552 | /* Terminate the player. */ | |
90b8faa5 | 553 | kill(-q->pid, config->signal); |
460b9539 | 554 | /* Cancel the track. */ |
555 | memset(&sm, 0, sizeof sm); | |
556 | sm.type = SM_CANCEL; | |
557 | strcpy(sm.id, q->id); | |
84aa9f93 | 558 | speaker_send(speaker_fd, &sm); |
460b9539 | 559 | } |
560 | ||
49a773eb | 561 | /** @brief Called with a new random track |
59cf25c4 | 562 | * @param ev Event loop |
49a773eb RK |
563 | * @param track Track name |
564 | */ | |
565 | static void chosen_random_track(ev_source *ev, | |
566 | const char *track) { | |
567 | struct queue_entry *q; | |
568 | ||
569 | if(!track) | |
570 | return; | |
571 | /* Add the track to the queue */ | |
2dc2f478 | 572 | q = queue_add(track, 0, WHERE_END, origin_random); |
49a773eb RK |
573 | D(("picked %p (%s) at random", (void *)q, q->track)); |
574 | queue_write(); | |
575 | /* Maybe a track can now be played */ | |
576 | play(ev); | |
577 | } | |
578 | ||
579 | /** @brief Maybe add a randomly chosen track | |
580 | * @param ev Event loop | |
16fb2830 RK |
581 | * |
582 | * Picking can take some time so the track will only be added after this | |
583 | * function has returned. | |
49a773eb RK |
584 | */ |
585 | void add_random_track(ev_source *ev) { | |
460b9539 | 586 | struct queue_entry *q; |
459d4402 | 587 | long qlen = 0; |
460b9539 | 588 | |
589 | /* If random play is not enabled then do nothing. */ | |
590 | if(shutting_down || !random_is_enabled()) | |
49a773eb | 591 | return; |
459d4402 | 592 | /* Count how big the queue is */ |
460b9539 | 593 | for(q = qhead.next; q != &qhead; q = q->next) |
459d4402 | 594 | ++qlen; |
49a773eb RK |
595 | /* If it's smaller than the desired size then add a track */ |
596 | if(qlen < config->queue_pad) | |
597 | trackdb_request_random(ev, chosen_random_track); | |
460b9539 | 598 | } |
599 | ||
16fb2830 RK |
600 | /** @brief Attempt to play something |
601 | * | |
602 | * This is called from numerous locations - whenever it might conceivably have | |
603 | * become possible to play something. | |
604 | */ | |
460b9539 | 605 | void play(ev_source *ev) { |
606 | struct queue_entry *q; | |
607 | int random_enabled = random_is_enabled(); | |
608 | ||
609 | D(("play playing=%p", (void *)playing)); | |
16fb2830 RK |
610 | /* If we're shutting down, or there's something playing, or playing is not |
611 | * enabled, give up now */ | |
460b9539 | 612 | if(shutting_down || playing || !playing_is_enabled()) return; |
49a773eb | 613 | /* See if there's anything to play */ |
460b9539 | 614 | if(qhead.next == &qhead) { |
49a773eb RK |
615 | /* Queue is empty. We could just wait around since there are periodic |
616 | * attempts to add a random track anyway. However they are rarer than | |
617 | * attempts to force a track so we initiate one now. */ | |
618 | add_random_track(ev); | |
16fb2830 RK |
619 | /* chosen_random_track() will call play() when a new random track has been |
620 | * added to the queue. */ | |
49a773eb | 621 | return; |
460b9539 | 622 | } |
49a773eb | 623 | /* There must be at least one track in the queue. */ |
460b9539 | 624 | q = qhead.next; |
2dc2f478 RK |
625 | /* If random play is disabled but the track is a non-adopted random one |
626 | * then don't play it. play() will be called again when random play is | |
627 | * re-enabled. */ | |
628 | if(!random_enabled && q->origin == origin_random) | |
460b9539 | 629 | return; |
630 | D(("taken %p (%s) from queue", (void *)q, q->track)); | |
631 | /* Try to start playing. */ | |
84aa9f93 | 632 | switch(start(ev, q, 0/*!prepare_only*/)) { |
460b9539 | 633 | case START_HARDFAIL: |
634 | if(q == qhead.next) { | |
635 | queue_remove(q, 0); /* Abandon this track. */ | |
636 | queue_played(q); | |
637 | recent_write(); | |
638 | } | |
49a773eb RK |
639 | /* Oh well, try the next one */ |
640 | play(ev); | |
460b9539 | 641 | break; |
642 | case START_SOFTFAIL: | |
49a773eb | 643 | /* We'll try the same track again shortly. */ |
460b9539 | 644 | break; |
645 | case START_OK: | |
16fb2830 | 646 | /* Remove from the queue */ |
460b9539 | 647 | if(q == qhead.next) { |
648 | queue_remove(q, 0); | |
649 | queue_write(); | |
650 | } | |
16fb2830 | 651 | /* It's become the playing track */ |
460b9539 | 652 | playing = q; |
653 | time(&playing->played); | |
654 | playing->state = playing_started; | |
655 | notify_play(playing->track, playing->submitter); | |
656 | eventlog("playing", playing->track, | |
657 | playing->submitter ? playing->submitter : (const char *)0, | |
658 | (const char *)0); | |
659 | /* Maybe add a random track. */ | |
49a773eb | 660 | add_random_track(ev); |
460b9539 | 661 | /* If there is another track in the queue prepare it now. This could |
662 | * potentially be a just-added random track. */ | |
663 | if(qhead.next != &qhead) | |
664 | prepare(ev, qhead.next); | |
665 | break; | |
666 | } | |
667 | } | |
668 | ||
16fb2830 | 669 | /** @brief Return true if play is enabled */ |
460b9539 | 670 | int playing_is_enabled(void) { |
671 | const char *s = trackdb_get_global("playing"); | |
672 | ||
673 | return !s || !strcmp(s, "yes"); | |
674 | } | |
675 | ||
16fb2830 | 676 | /** @brief Enable play */ |
460b9539 | 677 | void enable_playing(const char *who, ev_source *ev) { |
678 | trackdb_set_global("playing", "yes", who); | |
679 | /* Add a random track if necessary. */ | |
49a773eb | 680 | add_random_track(ev); |
460b9539 | 681 | play(ev); |
682 | } | |
683 | ||
16fb2830 | 684 | /** @brief Disable play */ |
460b9539 | 685 | void disable_playing(const char *who) { |
686 | trackdb_set_global("playing", "no", who); | |
687 | } | |
688 | ||
16fb2830 | 689 | /** @brief Return true if random play is enabled */ |
460b9539 | 690 | int random_is_enabled(void) { |
691 | const char *s = trackdb_get_global("random-play"); | |
692 | ||
693 | return !s || !strcmp(s, "yes"); | |
694 | } | |
695 | ||
16fb2830 | 696 | /** @brief Enable random play */ |
460b9539 | 697 | void enable_random(const char *who, ev_source *ev) { |
698 | trackdb_set_global("random-play", "yes", who); | |
49a773eb | 699 | add_random_track(ev); |
460b9539 | 700 | play(ev); |
701 | } | |
702 | ||
16fb2830 | 703 | /** @brief Disable random play */ |
460b9539 | 704 | void disable_random(const char *who) { |
705 | trackdb_set_global("random-play", "no", who); | |
706 | } | |
707 | ||
16fb2830 RK |
708 | /** @brief Scratch a track |
709 | * @param User responsible (or NULL) | |
710 | * @param Track ID (or NULL for current) | |
711 | */ | |
460b9539 | 712 | void scratch(const char *who, const char *id) { |
713 | struct queue_entry *q; | |
714 | struct speaker_message sm; | |
460b9539 | 715 | |
716 | D(("scratch playing=%p state=%d id=%s playing->id=%s", | |
717 | (void *)playing, | |
718 | playing ? playing->state : 0, | |
719 | id ? id : "(none)", | |
720 | playing ? playing->id : "(none)")); | |
16fb2830 RK |
721 | /* There must be a playing track; it must be in a scratchable state; if a |
722 | * specific ID was mentioned it must be that track. */ | |
460b9539 | 723 | if(playing |
724 | && (playing->state == playing_started | |
725 | || playing->state == playing_paused) | |
726 | && (!id | |
727 | || !strcmp(id, playing->id))) { | |
16fb2830 | 728 | /* Update state (for the benefit of the 'recent' list) */ |
460b9539 | 729 | playing->state = playing_scratched; |
730 | playing->scratched = who ? xstrdup(who) : 0; | |
16fb2830 | 731 | /* Find the player and kill the whole process group */ |
90b8faa5 RK |
732 | if(playing->pid >= 0) { |
733 | D(("kill -%d -%lu", config->signal, (unsigned long)playing->pid)); | |
734 | kill(-playing->pid, config->signal); | |
16fb2830 RK |
735 | } |
736 | /* Tell the speaker, if we think it'll care */ | |
460b9539 | 737 | if((playing->type & DISORDER_PLAYER_TYPEMASK) == DISORDER_PLAYER_RAW) { |
738 | memset(&sm, 0, sizeof sm); | |
739 | sm.type = SM_CANCEL; | |
740 | strcpy(sm.id, playing->id); | |
84aa9f93 | 741 | speaker_send(speaker_fd, &sm); |
460b9539 | 742 | D(("sending SM_CANCEL for %s", playing->id)); |
743 | } | |
744 | /* put a scratch track onto the front of the queue (but don't | |
745 | * bother if playing is disabled) */ | |
746 | if(playing_is_enabled() && config->scratch.n) { | |
747 | int r = rand() * (double)config->scratch.n / (RAND_MAX + 1.0); | |
2dc2f478 | 748 | q = queue_add(config->scratch.s[r], who, WHERE_START, origin_scratch); |
460b9539 | 749 | } |
750 | notify_scratch(playing->track, playing->submitter, who, | |
751 | time(0) - playing->played); | |
752 | } | |
753 | } | |
754 | ||
16fb2830 | 755 | /** @brief Called from quit() to tear down eveyrthing belonging to this file */ |
460b9539 | 756 | void quitting(ev_source *ev) { |
757 | struct queue_entry *q; | |
460b9539 | 758 | |
759 | /* Don't start anything new */ | |
760 | shutting_down = 1; | |
761 | /* Shut down the current player */ | |
762 | if(playing) { | |
90b8faa5 RK |
763 | if(playing->pid >= 0) |
764 | kill(-playing->pid, config->signal); | |
460b9539 | 765 | playing->state = playing_quitting; |
766 | finished(0); | |
767 | } | |
90b8faa5 | 768 | /* Zap any background decoders that are going */ |
460b9539 | 769 | for(q = qhead.next; q != &qhead; q = q->next) |
90b8faa5 RK |
770 | if(q->pid >= 0) { |
771 | D(("kill -%d %lu", config->signal, (unsigned long)q->pid)); | |
772 | kill(-q->pid, config->signal); | |
16fb2830 | 773 | } |
460b9539 | 774 | /* Don't need the speaker any more */ |
775 | ev_fd_cancel(ev, ev_read, speaker_fd); | |
776 | xclose(speaker_fd); | |
777 | } | |
778 | ||
16fb2830 | 779 | /** @brief Pause the playing track */ |
460b9539 | 780 | int pause_playing(const char *who) { |
781 | struct speaker_message sm; | |
782 | long played; | |
783 | ||
784 | /* Can't pause if already paused or if nothing playing. */ | |
785 | if(!playing || paused) return 0; | |
786 | switch(playing->type & DISORDER_PLAYER_TYPEMASK) { | |
787 | case DISORDER_PLAYER_STANDALONE: | |
788 | if(!(playing->type & DISORDER_PLAYER_PAUSES)) { | |
789 | default: | |
790 | error(0, "cannot pause because player is not powerful enough"); | |
791 | return -1; | |
792 | } | |
793 | if(play_pause(playing->pl, &played, playing->data)) { | |
794 | error(0, "player indicates it cannot pause"); | |
795 | return -1; | |
796 | } | |
797 | time(&playing->lastpaused); | |
798 | playing->uptopause = played; | |
799 | playing->lastresumed = 0; | |
800 | break; | |
801 | case DISORDER_PLAYER_RAW: | |
802 | memset(&sm, 0, sizeof sm); | |
803 | sm.type = SM_PAUSE; | |
84aa9f93 | 804 | speaker_send(speaker_fd, &sm); |
460b9539 | 805 | break; |
806 | } | |
807 | if(who) info("paused by %s", who); | |
808 | notify_pause(playing->track, who); | |
809 | paused = 1; | |
810 | if(playing->state == playing_started) | |
811 | playing->state = playing_paused; | |
812 | eventlog("state", "pause", (char *)0); | |
813 | return 0; | |
814 | } | |
815 | ||
16fb2830 | 816 | /** @brief Resume playing after a pause */ |
460b9539 | 817 | void resume_playing(const char *who) { |
818 | struct speaker_message sm; | |
819 | ||
820 | if(!paused) return; | |
821 | paused = 0; | |
822 | if(!playing) return; | |
823 | switch(playing->type & DISORDER_PLAYER_TYPEMASK) { | |
824 | case DISORDER_PLAYER_STANDALONE: | |
825 | if(!playing->type & DISORDER_PLAYER_PAUSES) { | |
826 | default: | |
827 | /* Shouldn't happen */ | |
828 | return; | |
829 | } | |
830 | play_resume(playing->pl, playing->data); | |
831 | time(&playing->lastresumed); | |
832 | break; | |
833 | case DISORDER_PLAYER_RAW: | |
834 | memset(&sm, 0, sizeof sm); | |
835 | sm.type = SM_RESUME; | |
84aa9f93 | 836 | speaker_send(speaker_fd, &sm); |
460b9539 | 837 | break; |
838 | } | |
839 | if(who) info("resumed by %s", who); | |
840 | notify_resume(playing->track, who); | |
841 | if(playing->state == playing_paused) | |
842 | playing->state = playing_started; | |
843 | eventlog("state", "resume", (char *)0); | |
844 | } | |
845 | ||
846 | /* | |
847 | Local Variables: | |
848 | c-basic-offset:2 | |
849 | comment-column:40 | |
850 | fill-column:79 | |
16fb2830 | 851 | indent-tabs-mode:nil |
460b9539 | 852 | End: |
853 | */ |