| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004-2008 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> |
| 22 | #include "types.h" |
| 23 | |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/time.h> |
| 26 | #include <unistd.h> |
| 27 | #include <errno.h> |
| 28 | #include <fnmatch.h> |
| 29 | #include <time.h> |
| 30 | #include <signal.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <assert.h> |
| 33 | #include <sys/socket.h> |
| 34 | #include <string.h> |
| 35 | #include <stdio.h> |
| 36 | #include <pcre.h> |
| 37 | #include <ao/ao.h> |
| 38 | #include <sys/wait.h> |
| 39 | #include <sys/un.h> |
| 40 | |
| 41 | #include "event.h" |
| 42 | #include "log.h" |
| 43 | #include "mem.h" |
| 44 | #include "configuration.h" |
| 45 | #include "queue.h" |
| 46 | #include "server-queue.h" |
| 47 | #include "rights.h" |
| 48 | #include "trackdb.h" |
| 49 | #include "play.h" |
| 50 | #include "plugin.h" |
| 51 | #include "wstat.h" |
| 52 | #include "eventlog.h" |
| 53 | #include "logfd.h" |
| 54 | #include "syscalls.h" |
| 55 | #include "speaker-protocol.h" |
| 56 | #include "disorder.h" |
| 57 | #include "signame.h" |
| 58 | #include "hash.h" |
| 59 | |
| 60 | #define SPEAKER "disorder-speaker" |
| 61 | |
| 62 | struct queue_entry *playing; |
| 63 | int paused; |
| 64 | |
| 65 | static void finished(ev_source *ev); |
| 66 | |
| 67 | static int speaker_fd = -1; |
| 68 | static hash *player_pids; |
| 69 | static int shutting_down; |
| 70 | |
| 71 | static void store_player_pid(const char *id, pid_t pid) { |
| 72 | if(!player_pids) player_pids = hash_new(sizeof (pid_t)); |
| 73 | hash_add(player_pids, id, &pid, HASH_INSERT_OR_REPLACE); |
| 74 | } |
| 75 | |
| 76 | static pid_t find_player_pid(const char *id) { |
| 77 | pid_t *pidp; |
| 78 | |
| 79 | if(player_pids && (pidp = hash_find(player_pids, id))) return *pidp; |
| 80 | return -1; |
| 81 | } |
| 82 | |
| 83 | static void forget_player_pid(const char *id) { |
| 84 | if(player_pids) hash_remove(player_pids, id); |
| 85 | } |
| 86 | |
| 87 | /* called when speaker process terminates */ |
| 88 | static int speaker_terminated(ev_source attribute((unused)) *ev, |
| 89 | pid_t attribute((unused)) pid, |
| 90 | int attribute((unused)) status, |
| 91 | const struct rusage attribute((unused)) *rusage, |
| 92 | void attribute((unused)) *u) { |
| 93 | fatal(0, "speaker subprocess %s", |
| 94 | wstat(status)); |
| 95 | } |
| 96 | |
| 97 | /* called when speaker process has something to say */ |
| 98 | static int speaker_readable(ev_source *ev, int fd, |
| 99 | void attribute((unused)) *u) { |
| 100 | struct speaker_message sm; |
| 101 | int ret = speaker_recv(fd, &sm); |
| 102 | |
| 103 | if(ret < 0) return 0; /* EAGAIN */ |
| 104 | if(!ret) { /* EOF */ |
| 105 | ev_fd_cancel(ev, ev_read, fd); |
| 106 | return 0; |
| 107 | } |
| 108 | switch(sm.type) { |
| 109 | case SM_PAUSED: |
| 110 | /* track ID is paused, DATA seconds played */ |
| 111 | D(("SM_PAUSED %s %ld", sm.id, sm.data)); |
| 112 | playing->sofar = sm.data; |
| 113 | break; |
| 114 | case SM_FINISHED: /* scratched the playing track */ |
| 115 | case SM_STILLBORN: /* scratched too early */ |
| 116 | case SM_UNKNOWN: /* scratched WAY too early */ |
| 117 | if(playing && !strcmp(sm.id, playing->id)) |
| 118 | finished(ev); |
| 119 | break; |
| 120 | case SM_PLAYING: |
| 121 | /* track ID is playing, DATA seconds played */ |
| 122 | D(("SM_PLAYING %s %ld", sm.id, sm.data)); |
| 123 | playing->sofar = sm.data; |
| 124 | break; |
| 125 | default: |
| 126 | error(0, "unknown message type %d", sm.type); |
| 127 | } |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | void speaker_setup(ev_source *ev) { |
| 132 | int sp[2]; |
| 133 | pid_t pid; |
| 134 | struct speaker_message sm; |
| 135 | |
| 136 | if(socketpair(PF_UNIX, SOCK_DGRAM, 0, sp) < 0) |
| 137 | fatal(errno, "error calling socketpair"); |
| 138 | if(!(pid = xfork())) { |
| 139 | exitfn = _exit; |
| 140 | ev_signal_atfork(ev); |
| 141 | xdup2(sp[0], 0); |
| 142 | xdup2(sp[0], 1); |
| 143 | xclose(sp[0]); |
| 144 | xclose(sp[1]); |
| 145 | signal(SIGPIPE, SIG_DFL); |
| 146 | #if 0 |
| 147 | execlp("valgrind", "valgrind", SPEAKER, "--config", configfile, |
| 148 | debugging ? "--debug" : "--no-debug", |
| 149 | log_default == &log_syslog ? "--syslog" : "--no-syslog", |
| 150 | (char *)0); |
| 151 | #else |
| 152 | execlp(SPEAKER, SPEAKER, "--config", configfile, |
| 153 | debugging ? "--debug" : "--no-debug", |
| 154 | log_default == &log_syslog ? "--syslog" : "--no-syslog", |
| 155 | (char *)0); |
| 156 | #endif |
| 157 | fatal(errno, "error invoking %s", SPEAKER); |
| 158 | } |
| 159 | ev_child(ev, pid, 0, speaker_terminated, 0); |
| 160 | speaker_fd = sp[1]; |
| 161 | xclose(sp[0]); |
| 162 | cloexec(speaker_fd); |
| 163 | /* Wait for the speaker to be ready */ |
| 164 | speaker_recv(speaker_fd, &sm); |
| 165 | nonblock(speaker_fd); |
| 166 | ev_fd(ev, ev_read, speaker_fd, speaker_readable, 0, "speaker read"); |
| 167 | } |
| 168 | |
| 169 | void speaker_reload(void) { |
| 170 | struct speaker_message sm; |
| 171 | |
| 172 | memset(&sm, 0, sizeof sm); |
| 173 | sm.type = SM_RELOAD; |
| 174 | speaker_send(speaker_fd, &sm); |
| 175 | } |
| 176 | |
| 177 | /* Called when the currently playing track finishes playing. This |
| 178 | * might be because the player finished or because the speaker process |
| 179 | * told us so. */ |
| 180 | static void finished(ev_source *ev) { |
| 181 | D(("finished playing=%p", (void *)playing)); |
| 182 | if(!playing) |
| 183 | return; |
| 184 | if(playing->state != playing_scratched) |
| 185 | notify_not_scratched(playing->track, playing->submitter); |
| 186 | switch(playing->state) { |
| 187 | case playing_ok: |
| 188 | eventlog("completed", playing->track, (char *)0); |
| 189 | break; |
| 190 | case playing_scratched: |
| 191 | eventlog("scratched", playing->track, playing->scratched, (char *)0); |
| 192 | break; |
| 193 | case playing_failed: |
| 194 | eventlog("failed", playing->track, wstat(playing->wstat), (char *)0); |
| 195 | break; |
| 196 | default: |
| 197 | break; |
| 198 | } |
| 199 | queue_played(playing); |
| 200 | recent_write(); |
| 201 | forget_player_pid(playing->id); |
| 202 | playing = 0; |
| 203 | /* Try to play something else */ |
| 204 | /* TODO re-support config->gap? */ |
| 205 | if(ev) |
| 206 | play(ev); |
| 207 | } |
| 208 | |
| 209 | /* Called when a player terminates. */ |
| 210 | static int player_finished(ev_source *ev, |
| 211 | pid_t pid, |
| 212 | int status, |
| 213 | const struct rusage attribute((unused)) *rusage, |
| 214 | void *u) { |
| 215 | struct queue_entry *q = u; |
| 216 | |
| 217 | D(("player_finished pid=%lu status=%#x", |
| 218 | (unsigned long)pid, (unsigned)status)); |
| 219 | /* Record that this PID is dead. If we killed the track we might know this |
| 220 | * already, but also it might have exited or crashed. Either way we don't |
| 221 | * want to end up signalling it. */ |
| 222 | if(pid == find_player_pid(q->id)) |
| 223 | forget_player_pid(q->id); |
| 224 | switch(q->state) { |
| 225 | case playing_unplayed: |
| 226 | case playing_random: |
| 227 | /* If this was a pre-prepared track then either it failed or we |
| 228 | * deliberately stopped it because it was removed from the queue or moved |
| 229 | * down it. So leave it state alone for future use. */ |
| 230 | break; |
| 231 | default: |
| 232 | /* We actually started playing this track. */ |
| 233 | if(status) { |
| 234 | if(q->state != playing_scratched) |
| 235 | q->state = playing_failed; |
| 236 | } else |
| 237 | q->state = playing_ok; |
| 238 | break; |
| 239 | } |
| 240 | /* Regardless we always report and record the status and do cleanup for |
| 241 | * prefork calls. */ |
| 242 | if(status) |
| 243 | error(0, "player for %s %s", q->track, wstat(status)); |
| 244 | if(q->type & DISORDER_PLAYER_PREFORK) |
| 245 | play_cleanup(q->pl, q->data); |
| 246 | q->wstat = status; |
| 247 | /* If this actually was the current track, and does not use the speaker |
| 248 | * process, then it must have finished. For raw-output players we will get a |
| 249 | * separate notification from the speaker process. */ |
| 250 | if(q == playing |
| 251 | && (q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) |
| 252 | finished(ev); |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | /* Find the player for Q */ |
| 257 | static int find_player(const struct queue_entry *q) { |
| 258 | int n; |
| 259 | |
| 260 | for(n = 0; n < config->player.n; ++n) |
| 261 | if(fnmatch(config->player.s[n].s[0], q->track, 0) == 0) |
| 262 | break; |
| 263 | if(n >= config->player.n) |
| 264 | return -1; |
| 265 | else |
| 266 | return n; |
| 267 | } |
| 268 | |
| 269 | /* Return values from start() */ |
| 270 | #define START_OK 0 /**< @brief Succeeded. */ |
| 271 | #define START_HARDFAIL 1 /**< @brief Track is broken. */ |
| 272 | #define START_SOFTFAIL 2 /**< @brief Track OK, system (temporarily?) broken */ |
| 273 | |
| 274 | /** @brief Play or prepare @p q |
| 275 | * @param ev Event loop |
| 276 | * @param q Track to play/prepare |
| 277 | * @param prepare_only If true, only prepares track |
| 278 | * @return @ref START_OK, @ref START_HARDFAIL or @ref START_SOFTFAIL |
| 279 | */ |
| 280 | static int start(ev_source *ev, |
| 281 | struct queue_entry *q, |
| 282 | int prepare_only) { |
| 283 | int n, lfd; |
| 284 | const char *p; |
| 285 | int np[2], sfd; |
| 286 | struct speaker_message sm; |
| 287 | char buffer[64]; |
| 288 | int optc; |
| 289 | ao_sample_format format; |
| 290 | ao_device *device; |
| 291 | int retries; |
| 292 | struct timespec ts; |
| 293 | const char *waitdevice = 0; |
| 294 | const char *const *optv; |
| 295 | pid_t pid, npid; |
| 296 | struct sockaddr_un addr; |
| 297 | uint32_t l; |
| 298 | |
| 299 | memset(&sm, 0, sizeof sm); |
| 300 | D(("start %s %d", q->id, prepare_only)); |
| 301 | if(q->prepared) { |
| 302 | /* The track is alraedy prepared */ |
| 303 | if(!prepare_only) { |
| 304 | /* We want to run it, since it's prepared the answer is to tell the |
| 305 | * speaker to set it off */ |
| 306 | strcpy(sm.id, q->id); |
| 307 | sm.type = SM_PLAY; |
| 308 | speaker_send(speaker_fd, &sm); |
| 309 | D(("sent SM_PLAY for %s", sm.id)); |
| 310 | } |
| 311 | return START_OK; |
| 312 | } |
| 313 | /* Find the player plugin. */ |
| 314 | if((n = find_player(q)) < 0) return START_HARDFAIL; |
| 315 | if(!(q->pl = open_plugin(config->player.s[n].s[1], 0))) |
| 316 | return START_HARDFAIL; |
| 317 | q->type = play_get_type(q->pl); |
| 318 | /* Can't prepare non-raw tracks. */ |
| 319 | if(prepare_only |
| 320 | && (q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) |
| 321 | return START_OK; |
| 322 | /* Call the prefork function. */ |
| 323 | p = trackdb_rawpath(q->track); |
| 324 | if(q->type & DISORDER_PLAYER_PREFORK) |
| 325 | if(!(q->data = play_prefork(q->pl, p))) { |
| 326 | error(0, "prefork function for %s failed", q->track); |
| 327 | return START_HARDFAIL; |
| 328 | } |
| 329 | /* Use the second arg as the tag if available (it's probably a command name), |
| 330 | * otherwise the module name. */ |
| 331 | if(!isatty(2)) |
| 332 | lfd = logfd(ev, (config->player.s[n].s[2] |
| 333 | ? config->player.s[n].s[2] : config->player.s[n].s[1])); |
| 334 | else |
| 335 | lfd = -1; |
| 336 | optc = config->player.s[n].n - 2; |
| 337 | optv = (void *)&config->player.s[n].s[2]; |
| 338 | while(optc > 0 && optv[0][0] == '-') { |
| 339 | if(!strcmp(optv[0], "--")) { |
| 340 | ++optv; |
| 341 | --optc; |
| 342 | break; |
| 343 | } |
| 344 | if(!strcmp(optv[0], "--wait-for-device") |
| 345 | || !strncmp(optv[0], "--wait-for-device=", 18)) { |
| 346 | if((waitdevice = strchr(optv[0], '='))) { |
| 347 | ++waitdevice; |
| 348 | } else |
| 349 | waitdevice = ""; /* use default */ |
| 350 | ++optv; |
| 351 | --optc; |
| 352 | } else { |
| 353 | error(0, "unknown option %s", optv[0]); |
| 354 | return START_HARDFAIL; |
| 355 | } |
| 356 | } |
| 357 | switch(pid = fork()) { |
| 358 | case 0: /* child */ |
| 359 | exitfn = _exit; |
| 360 | progname = "disorderd-fork"; |
| 361 | ev_signal_atfork(ev); |
| 362 | signal(SIGPIPE, SIG_DFL); |
| 363 | if(lfd != -1) { |
| 364 | xdup2(lfd, 1); |
| 365 | xdup2(lfd, 2); |
| 366 | xclose(lfd); /* tidy up */ |
| 367 | } |
| 368 | setpgid(0, 0); |
| 369 | if((q->type & DISORDER_PLAYER_TYPEMASK) == DISORDER_PLAYER_RAW) { |
| 370 | /* "Raw" format players always have their output send down a pipe |
| 371 | * to the disorder-normalize process. This will connect to the |
| 372 | * speaker process to actually play the audio data. |
| 373 | */ |
| 374 | /* np will be the pipe to disorder-normalize */ |
| 375 | if(socketpair(PF_UNIX, SOCK_STREAM, 0, np) < 0) |
| 376 | fatal(errno, "error calling socketpair"); |
| 377 | /* Beware of the Leopard! On OS X 10.5.x, the order of the shutdown |
| 378 | * calls here DOES MATTER. If you do the SHUT_WR first then the SHUT_RD |
| 379 | * fails with "Socket is not connected". I think this is a bug but |
| 380 | * provided implementors either don't care about the order or all agree |
| 381 | * about the order, choosing the reliable order is an adequate |
| 382 | * workaround. */ |
| 383 | xshutdown(np[1], SHUT_RD); /* decoder writes to np[1] */ |
| 384 | xshutdown(np[0], SHUT_WR); /* normalize reads from np[0] */ |
| 385 | blocking(np[0]); |
| 386 | blocking(np[1]); |
| 387 | /* Start disorder-normalize */ |
| 388 | if(!(npid = xfork())) { |
| 389 | if(!xfork()) { |
| 390 | /* Connect to the speaker process */ |
| 391 | memset(&addr, 0, sizeof addr); |
| 392 | addr.sun_family = AF_UNIX; |
| 393 | snprintf(addr.sun_path, sizeof addr.sun_path, |
| 394 | "%s/speaker/socket", config->home); |
| 395 | sfd = xsocket(PF_UNIX, SOCK_STREAM, 0); |
| 396 | if(connect(sfd, (const struct sockaddr *)&addr, sizeof addr) < 0) |
| 397 | fatal(errno, "connecting to %s", addr.sun_path); |
| 398 | l = strlen(q->id); |
| 399 | if(write(sfd, &l, sizeof l) < 0 |
| 400 | || write(sfd, q->id, l) < 0) |
| 401 | fatal(errno, "writing to %s", addr.sun_path); |
| 402 | /* Await the ack */ |
| 403 | read(sfd, &l, 1); |
| 404 | /* Plumbing */ |
| 405 | xdup2(np[0], 0); |
| 406 | xdup2(sfd, 1); |
| 407 | xclose(np[0]); |
| 408 | xclose(np[1]); |
| 409 | xclose(sfd); |
| 410 | /* Ask the speaker to actually start playing the track; we do it here |
| 411 | * so it's definitely after ack. */ |
| 412 | if(!prepare_only) { |
| 413 | strcpy(sm.id, q->id); |
| 414 | sm.type = SM_PLAY; |
| 415 | speaker_send(speaker_fd, &sm); |
| 416 | D(("sent SM_PLAY for %s", sm.id)); |
| 417 | } |
| 418 | /* TODO stderr shouldn't be redirected for disorder-normalize |
| 419 | * (but it should be for play_track() */ |
| 420 | execlp("disorder-normalize", "disorder-normalize", |
| 421 | log_default == &log_syslog ? "--syslog" : "--no-syslog", |
| 422 | "--config", configfile, |
| 423 | (char *)0); |
| 424 | fatal(errno, "executing disorder-normalize"); |
| 425 | /* end of the innermost fork */ |
| 426 | } |
| 427 | _exit(0); |
| 428 | /* end of the middle fork */ |
| 429 | } |
| 430 | /* Wait for the middle fork to finish */ |
| 431 | while(waitpid(npid, &n, 0) < 0 && errno == EINTR) |
| 432 | ; |
| 433 | /* Pass the file descriptor to the driver in an environment |
| 434 | * variable. */ |
| 435 | snprintf(buffer, sizeof buffer, "DISORDER_RAW_FD=%d", np[1]); |
| 436 | if(putenv(buffer) < 0) |
| 437 | fatal(errno, "error calling putenv"); |
| 438 | /* Close all the FDs we don't need */ |
| 439 | xclose(np[0]); |
| 440 | } |
| 441 | if(waitdevice) { |
| 442 | ao_initialize(); |
| 443 | if(*waitdevice) { |
| 444 | n = ao_driver_id(waitdevice); |
| 445 | if(n == -1) |
| 446 | fatal(0, "invalid libao driver: %s", optv[0]); |
| 447 | } else |
| 448 | n = ao_default_driver_id(); |
| 449 | /* Make up a format. */ |
| 450 | memset(&format, 0, sizeof format); |
| 451 | format.bits = 8; |
| 452 | format.rate = 44100; |
| 453 | format.channels = 1; |
| 454 | format.byte_format = AO_FMT_NATIVE; |
| 455 | retries = 20; |
| 456 | ts.tv_sec = 0; |
| 457 | ts.tv_nsec = 100000000; /* 0.1s */ |
| 458 | while((device = ao_open_live(n, &format, 0)) == 0 && retries-- > 0) |
| 459 | nanosleep(&ts, 0); |
| 460 | if(device) |
| 461 | ao_close(device); |
| 462 | } |
| 463 | play_track(q->pl, |
| 464 | optv, optc, |
| 465 | p, |
| 466 | q->track); |
| 467 | _exit(0); |
| 468 | case -1: /* error */ |
| 469 | error(errno, "error calling fork"); |
| 470 | if(q->type & DISORDER_PLAYER_PREFORK) |
| 471 | play_cleanup(q->pl, q->data); /* else would leak */ |
| 472 | if(lfd != -1) |
| 473 | xclose(lfd); |
| 474 | return START_SOFTFAIL; |
| 475 | } |
| 476 | store_player_pid(q->id, pid); |
| 477 | q->prepared = 1; |
| 478 | if(lfd != -1) |
| 479 | xclose(lfd); |
| 480 | setpgid(pid, pid); |
| 481 | ev_child(ev, pid, 0, player_finished, q); |
| 482 | D(("player subprocess ID %lu", (unsigned long)pid)); |
| 483 | return START_OK; |
| 484 | } |
| 485 | |
| 486 | int prepare(ev_source *ev, |
| 487 | struct queue_entry *q) { |
| 488 | int n; |
| 489 | |
| 490 | /* Find the player plugin */ |
| 491 | if(find_player_pid(q->id) > 0) return 0; /* Already going. */ |
| 492 | if((n = find_player(q)) < 0) return -1; /* No player */ |
| 493 | q->pl = open_plugin(config->player.s[n].s[1], 0); /* No player */ |
| 494 | q->type = play_get_type(q->pl); |
| 495 | if((q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) |
| 496 | return 0; /* Not a raw player */ |
| 497 | return start(ev, q, 1/*prepare_only*/); /* Prepare it */ |
| 498 | } |
| 499 | |
| 500 | void abandon(ev_source attribute((unused)) *ev, |
| 501 | struct queue_entry *q) { |
| 502 | struct speaker_message sm; |
| 503 | pid_t pid = find_player_pid(q->id); |
| 504 | |
| 505 | if(pid < 0) return; /* Not prepared. */ |
| 506 | if((q->type & DISORDER_PLAYER_TYPEMASK) != DISORDER_PLAYER_RAW) |
| 507 | return; /* Not a raw player. */ |
| 508 | /* Terminate the player. */ |
| 509 | kill(-pid, config->signal); |
| 510 | forget_player_pid(q->id); |
| 511 | /* Cancel the track. */ |
| 512 | memset(&sm, 0, sizeof sm); |
| 513 | sm.type = SM_CANCEL; |
| 514 | strcpy(sm.id, q->id); |
| 515 | speaker_send(speaker_fd, &sm); |
| 516 | } |
| 517 | |
| 518 | /** @brief Called with a new random track |
| 519 | * @param track Track name |
| 520 | */ |
| 521 | static void chosen_random_track(ev_source *ev, |
| 522 | const char *track) { |
| 523 | struct queue_entry *q; |
| 524 | |
| 525 | if(!track) |
| 526 | return; |
| 527 | /* Add the track to the queue */ |
| 528 | q = queue_add(track, 0, WHERE_END); |
| 529 | q->state = playing_random; |
| 530 | D(("picked %p (%s) at random", (void *)q, q->track)); |
| 531 | queue_write(); |
| 532 | /* Maybe a track can now be played */ |
| 533 | play(ev); |
| 534 | } |
| 535 | |
| 536 | /** @brief Maybe add a randomly chosen track |
| 537 | * @param ev Event loop |
| 538 | */ |
| 539 | void add_random_track(ev_source *ev) { |
| 540 | struct queue_entry *q; |
| 541 | long qlen = 0; |
| 542 | |
| 543 | /* If random play is not enabled then do nothing. */ |
| 544 | if(shutting_down || !random_is_enabled()) |
| 545 | return; |
| 546 | /* Count how big the queue is */ |
| 547 | for(q = qhead.next; q != &qhead; q = q->next) |
| 548 | ++qlen; |
| 549 | /* If it's smaller than the desired size then add a track */ |
| 550 | if(qlen < config->queue_pad) |
| 551 | trackdb_request_random(ev, chosen_random_track); |
| 552 | } |
| 553 | |
| 554 | /* try to play a track */ |
| 555 | void play(ev_source *ev) { |
| 556 | struct queue_entry *q; |
| 557 | int random_enabled = random_is_enabled(); |
| 558 | |
| 559 | D(("play playing=%p", (void *)playing)); |
| 560 | if(shutting_down || playing || !playing_is_enabled()) return; |
| 561 | /* See if there's anything to play */ |
| 562 | if(qhead.next == &qhead) { |
| 563 | /* Queue is empty. We could just wait around since there are periodic |
| 564 | * attempts to add a random track anyway. However they are rarer than |
| 565 | * attempts to force a track so we initiate one now. */ |
| 566 | add_random_track(ev); |
| 567 | return; |
| 568 | } |
| 569 | /* There must be at least one track in the queue. */ |
| 570 | q = qhead.next; |
| 571 | /* If random play is disabled but the track is a random one then don't play |
| 572 | * it. play() will be called again when random play is re-enabled. */ |
| 573 | if(!random_enabled && q->state == playing_random) |
| 574 | return; |
| 575 | D(("taken %p (%s) from queue", (void *)q, q->track)); |
| 576 | /* Try to start playing. */ |
| 577 | switch(start(ev, q, 0/*!prepare_only*/)) { |
| 578 | case START_HARDFAIL: |
| 579 | if(q == qhead.next) { |
| 580 | queue_remove(q, 0); /* Abandon this track. */ |
| 581 | queue_played(q); |
| 582 | recent_write(); |
| 583 | } |
| 584 | /* Oh well, try the next one */ |
| 585 | play(ev); |
| 586 | break; |
| 587 | case START_SOFTFAIL: |
| 588 | /* We'll try the same track again shortly. */ |
| 589 | break; |
| 590 | case START_OK: |
| 591 | if(q == qhead.next) { |
| 592 | queue_remove(q, 0); |
| 593 | queue_write(); |
| 594 | } |
| 595 | playing = q; |
| 596 | time(&playing->played); |
| 597 | playing->state = playing_started; |
| 598 | notify_play(playing->track, playing->submitter); |
| 599 | eventlog("playing", playing->track, |
| 600 | playing->submitter ? playing->submitter : (const char *)0, |
| 601 | (const char *)0); |
| 602 | /* Maybe add a random track. */ |
| 603 | add_random_track(ev); |
| 604 | /* If there is another track in the queue prepare it now. This could |
| 605 | * potentially be a just-added random track. */ |
| 606 | if(qhead.next != &qhead) |
| 607 | prepare(ev, qhead.next); |
| 608 | break; |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | int playing_is_enabled(void) { |
| 613 | const char *s = trackdb_get_global("playing"); |
| 614 | |
| 615 | return !s || !strcmp(s, "yes"); |
| 616 | } |
| 617 | |
| 618 | void enable_playing(const char *who, ev_source *ev) { |
| 619 | trackdb_set_global("playing", "yes", who); |
| 620 | /* Add a random track if necessary. */ |
| 621 | add_random_track(ev); |
| 622 | play(ev); |
| 623 | } |
| 624 | |
| 625 | void disable_playing(const char *who) { |
| 626 | trackdb_set_global("playing", "no", who); |
| 627 | } |
| 628 | |
| 629 | int random_is_enabled(void) { |
| 630 | const char *s = trackdb_get_global("random-play"); |
| 631 | |
| 632 | return !s || !strcmp(s, "yes"); |
| 633 | } |
| 634 | |
| 635 | void enable_random(const char *who, ev_source *ev) { |
| 636 | trackdb_set_global("random-play", "yes", who); |
| 637 | add_random_track(ev); |
| 638 | play(ev); |
| 639 | } |
| 640 | |
| 641 | void disable_random(const char *who) { |
| 642 | trackdb_set_global("random-play", "no", who); |
| 643 | } |
| 644 | |
| 645 | void scratch(const char *who, const char *id) { |
| 646 | struct queue_entry *q; |
| 647 | struct speaker_message sm; |
| 648 | pid_t pid; |
| 649 | |
| 650 | D(("scratch playing=%p state=%d id=%s playing->id=%s", |
| 651 | (void *)playing, |
| 652 | playing ? playing->state : 0, |
| 653 | id ? id : "(none)", |
| 654 | playing ? playing->id : "(none)")); |
| 655 | if(playing |
| 656 | && (playing->state == playing_started |
| 657 | || playing->state == playing_paused) |
| 658 | && (!id |
| 659 | || !strcmp(id, playing->id))) { |
| 660 | playing->state = playing_scratched; |
| 661 | playing->scratched = who ? xstrdup(who) : 0; |
| 662 | if((pid = find_player_pid(playing->id)) > 0) { |
| 663 | D(("kill -%d %lu", config->signal, (unsigned long)pid)); |
| 664 | kill(-pid, config->signal); |
| 665 | forget_player_pid(playing->id); |
| 666 | } else |
| 667 | error(0, "could not find PID for %s", playing->id); |
| 668 | if((playing->type & DISORDER_PLAYER_TYPEMASK) == DISORDER_PLAYER_RAW) { |
| 669 | memset(&sm, 0, sizeof sm); |
| 670 | sm.type = SM_CANCEL; |
| 671 | strcpy(sm.id, playing->id); |
| 672 | speaker_send(speaker_fd, &sm); |
| 673 | D(("sending SM_CANCEL for %s", playing->id)); |
| 674 | } |
| 675 | /* put a scratch track onto the front of the queue (but don't |
| 676 | * bother if playing is disabled) */ |
| 677 | if(playing_is_enabled() && config->scratch.n) { |
| 678 | int r = rand() * (double)config->scratch.n / (RAND_MAX + 1.0); |
| 679 | q = queue_add(config->scratch.s[r], who, WHERE_START); |
| 680 | q->state = playing_isscratch; |
| 681 | } |
| 682 | notify_scratch(playing->track, playing->submitter, who, |
| 683 | time(0) - playing->played); |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | void quitting(ev_source *ev) { |
| 688 | struct queue_entry *q; |
| 689 | pid_t pid; |
| 690 | |
| 691 | /* Don't start anything new */ |
| 692 | shutting_down = 1; |
| 693 | /* Shut down the current player */ |
| 694 | if(playing) { |
| 695 | if((pid = find_player_pid(playing->id)) > 0) { |
| 696 | kill(-pid, config->signal); |
| 697 | forget_player_pid(playing->id); |
| 698 | } else |
| 699 | error(0, "could not find PID for %s", playing->id); |
| 700 | playing->state = playing_quitting; |
| 701 | finished(0); |
| 702 | } |
| 703 | /* Zap any other players */ |
| 704 | for(q = qhead.next; q != &qhead; q = q->next) |
| 705 | if((pid = find_player_pid(q->id)) > 0) { |
| 706 | D(("kill -%d %lu", config->signal, (unsigned long)pid)); |
| 707 | kill(-pid, config->signal); |
| 708 | forget_player_pid(q->id); |
| 709 | } else |
| 710 | error(0, "could not find PID for %s", q->id); |
| 711 | /* Don't need the speaker any more */ |
| 712 | ev_fd_cancel(ev, ev_read, speaker_fd); |
| 713 | xclose(speaker_fd); |
| 714 | } |
| 715 | |
| 716 | int pause_playing(const char *who) { |
| 717 | struct speaker_message sm; |
| 718 | long played; |
| 719 | |
| 720 | /* Can't pause if already paused or if nothing playing. */ |
| 721 | if(!playing || paused) return 0; |
| 722 | switch(playing->type & DISORDER_PLAYER_TYPEMASK) { |
| 723 | case DISORDER_PLAYER_STANDALONE: |
| 724 | if(!(playing->type & DISORDER_PLAYER_PAUSES)) { |
| 725 | default: |
| 726 | error(0, "cannot pause because player is not powerful enough"); |
| 727 | return -1; |
| 728 | } |
| 729 | if(play_pause(playing->pl, &played, playing->data)) { |
| 730 | error(0, "player indicates it cannot pause"); |
| 731 | return -1; |
| 732 | } |
| 733 | time(&playing->lastpaused); |
| 734 | playing->uptopause = played; |
| 735 | playing->lastresumed = 0; |
| 736 | break; |
| 737 | case DISORDER_PLAYER_RAW: |
| 738 | memset(&sm, 0, sizeof sm); |
| 739 | sm.type = SM_PAUSE; |
| 740 | speaker_send(speaker_fd, &sm); |
| 741 | break; |
| 742 | } |
| 743 | if(who) info("paused by %s", who); |
| 744 | notify_pause(playing->track, who); |
| 745 | paused = 1; |
| 746 | if(playing->state == playing_started) |
| 747 | playing->state = playing_paused; |
| 748 | eventlog("state", "pause", (char *)0); |
| 749 | return 0; |
| 750 | } |
| 751 | |
| 752 | void resume_playing(const char *who) { |
| 753 | struct speaker_message sm; |
| 754 | |
| 755 | if(!paused) return; |
| 756 | paused = 0; |
| 757 | if(!playing) return; |
| 758 | switch(playing->type & DISORDER_PLAYER_TYPEMASK) { |
| 759 | case DISORDER_PLAYER_STANDALONE: |
| 760 | if(!playing->type & DISORDER_PLAYER_PAUSES) { |
| 761 | default: |
| 762 | /* Shouldn't happen */ |
| 763 | return; |
| 764 | } |
| 765 | play_resume(playing->pl, playing->data); |
| 766 | time(&playing->lastresumed); |
| 767 | break; |
| 768 | case DISORDER_PLAYER_RAW: |
| 769 | memset(&sm, 0, sizeof sm); |
| 770 | sm.type = SM_RESUME; |
| 771 | speaker_send(speaker_fd, &sm); |
| 772 | break; |
| 773 | } |
| 774 | if(who) info("resumed by %s", who); |
| 775 | notify_resume(playing->track, who); |
| 776 | if(playing->state == playing_paused) |
| 777 | playing->state = playing_started; |
| 778 | eventlog("state", "resume", (char *)0); |
| 779 | } |
| 780 | |
| 781 | /* |
| 782 | Local Variables: |
| 783 | c-basic-offset:2 |
| 784 | comment-column:40 |
| 785 | fill-column:79 |
| 786 | End: |
| 787 | */ |