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460b9539 | 1 | /* |
2 | * This file is part of DisOrder | |
b50cfb8a | 3 | * Copyright (C) 2005-2009 Richard Kettlewell |
313acc77 | 4 | * Portions (C) 2007 Mark Wooding |
460b9539 | 5 | * |
e7eb3a27 | 6 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 7 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 8 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 9 | * (at your option) any later version. |
e7eb3a27 RK |
10 | * |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
460b9539 | 16 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 18 | */ |
1674096e | 19 | /** @file server/speaker.c |
cf714d85 | 20 | * @brief Speaker process |
1674096e | 21 | * |
22 | * This program is responsible for transmitting a single coherent audio stream | |
23 | * to its destination (over the network, to some sound API, to some | |
42829e58 RK |
24 | * subprocess). It receives connections from decoders (or rather from the |
25 | * process that is about to become disorder-normalize) and plays them in the | |
26 | * right order. | |
1674096e | 27 | * |
b50cfb8a RK |
28 | * @b Model. mainloop() implements a select loop awaiting commands from the |
29 | * main server, new connections to the speaker socket, and audio data on those | |
30 | * connections. Each connection starts with a queue ID (with a 32-bit | |
31 | * native-endian length word), allowing it to be referred to in commands from | |
32 | * the server. | |
33 | * | |
34 | * Data read on connections is buffered, up to a limit (currently 1Mbyte per | |
35 | * track). No attempt is made here to limit the number of tracks, it is | |
36 | * assumed that the main server won't start outrageously many decoders. | |
37 | * | |
38 | * Audio is supplied from this buffer to the uaudio play callback. Playback is | |
39 | * enabled when a track is to be played and disabled when the its last bytes | |
40 | * have been return by the callback; pause and resume is implemneted the | |
41 | * obvious way. If the callback finds itself required to play when there is no | |
42 | * playing track it returns dead air. | |
43 | * | |
44 | * @b Encodings. The encodings supported depend entirely on the uaudio backend | |
45 | * chosen. See @ref uaudio.h, etc. | |
1674096e | 46 | * |
6d2d327c RK |
47 | * Inbound data is expected to match @c config->sample_format. In normal use |
48 | * this is arranged by the @c disorder-normalize program (see @ref | |
49 | * server/normalize.c). | |
1674096e | 50 | * |
5b7a22c6 | 51 | * @b Garbage @b Collection. This program deliberately does not use the |
795192f4 | 52 | * garbage collector even though it might be convenient to do so. This is for |
53 | * two reasons. Firstly some sound APIs use thread threads and we do not want | |
54 | * to have to deal with potential interactions between threading and garbage | |
55 | * collection. Secondly this process needs to be able to respond quickly and | |
56 | * this is not compatible with the collector hanging the program even | |
57 | * relatively briefly. | |
58 | * | |
59 | * @b Units. This program thinks at various times in three different units. | |
60 | * Bytes are obvious. A sample is a single sample on a single channel. A | |
61 | * frame is several samples on different channels at the same point in time. | |
62 | * So (for instance) a 16-bit stereo frame is 4 bytes and consists of a pair of | |
63 | * 2-byte samples. | |
1674096e | 64 | */ |
460b9539 | 65 | |
05b75f8d | 66 | #include "common.h" |
460b9539 | 67 | |
68 | #include <getopt.h> | |
460b9539 | 69 | #include <locale.h> |
70 | #include <syslog.h> | |
71 | #include <unistd.h> | |
72 | #include <errno.h> | |
73 | #include <ao/ao.h> | |
460b9539 | 74 | #include <sys/select.h> |
9d5da576 | 75 | #include <sys/wait.h> |
460b9539 | 76 | #include <time.h> |
8023f60b | 77 | #include <fcntl.h> |
78 | #include <poll.h> | |
84aa9f93 | 79 | #include <sys/un.h> |
a5f3ca1e | 80 | #include <sys/stat.h> |
b50cfb8a | 81 | #include <pthread.h> |
adeb58a0 | 82 | #include <sys/resource.h> |
460b9539 | 83 | |
84 | #include "configuration.h" | |
85 | #include "syscalls.h" | |
86 | #include "log.h" | |
87 | #include "defs.h" | |
88 | #include "mem.h" | |
ea410ba1 | 89 | #include "speaker-protocol.h" |
460b9539 | 90 | #include "user.h" |
85cb23d7 | 91 | #include "printf.h" |
3fbdc96d | 92 | #include "version.h" |
b50cfb8a | 93 | #include "uaudio.h" |
460b9539 | 94 | |
b50cfb8a RK |
95 | /** @brief Maximum number of FDs to poll for */ |
96 | #define NFDS 1024 | |
e83d0967 | 97 | |
b50cfb8a RK |
98 | /** @brief Track structure |
99 | * | |
100 | * Known tracks are kept in a linked list. Usually there will be at most two | |
101 | * of these but rearranging the queue can cause there to be more. | |
102 | */ | |
103 | struct track { | |
104 | /** @brief Next track */ | |
105 | struct track *next; | |
106 | ||
107 | /** @brief Input file descriptor */ | |
108 | int fd; /* input FD */ | |
109 | ||
110 | /** @brief Track ID */ | |
111 | char id[24]; | |
112 | ||
113 | /** @brief Start position of data in buffer */ | |
114 | size_t start; | |
115 | ||
116 | /** @brief Number of bytes of data in buffer */ | |
117 | size_t used; | |
118 | ||
119 | /** @brief Set @c fd is at EOF */ | |
120 | int eof; | |
121 | ||
122 | /** @brief Total number of samples played */ | |
123 | unsigned long long played; | |
124 | ||
125 | /** @brief Slot in @ref fds */ | |
126 | int slot; | |
127 | ||
128 | /** @brief Set when playable | |
129 | * | |
130 | * A track becomes playable whenever it fills its buffer or reaches EOF; it | |
131 | * stops being playable when it entirely empties its buffer. Tracks start | |
132 | * out life not playable. | |
133 | */ | |
134 | int playable; | |
135 | ||
136 | /** @brief Input buffer | |
137 | * | |
138 | * 1Mbyte is enough for nearly 6s of 44100Hz 16-bit stereo | |
139 | */ | |
140 | char buffer[1048576]; | |
141 | }; | |
460b9539 | 142 | |
b50cfb8a RK |
143 | /** @brief Lock protecting data structures |
144 | * | |
145 | * This lock protects values shared between the main thread and the callback. | |
146 | * It is needed e.g. if changing @ref playing or if modifying buffer pointers. | |
147 | * It is not needed to add a new track, to read values only modified in the | |
148 | * same thread, etc. | |
149 | */ | |
150 | static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; | |
151 | ||
152 | /** @brief Linked list of all prepared tracks */ | |
153 | static struct track *tracks; | |
154 | ||
155 | /** @brief Playing track, or NULL | |
156 | * | |
157 | * This means the DESIRED playing track. It does not reflect any other state | |
158 | * (e.g. activation of uaudio backend). | |
159 | */ | |
160 | static struct track *playing; | |
1c3f1e73 | 161 | |
162 | /** @brief Array of file descriptors for poll() */ | |
b50cfb8a | 163 | static struct pollfd fds[NFDS]; |
1c3f1e73 | 164 | |
165 | /** @brief Next free slot in @ref fds */ | |
b50cfb8a | 166 | static int fdno; |
1c3f1e73 | 167 | |
84aa9f93 RK |
168 | /** @brief Listen socket */ |
169 | static int listenfd; | |
170 | ||
b50cfb8a RK |
171 | /** @brief Timestamp of last potential report to server */ |
172 | static time_t last_report; | |
50ae38dd | 173 | |
b50cfb8a RK |
174 | /** @brief Set when paused */ |
175 | static int paused; | |
50ae38dd | 176 | |
b50cfb8a RK |
177 | /** @brief Set when back end activated */ |
178 | static int activated; | |
179 | ||
180 | /** @brief Signal pipe back into the poll() loop */ | |
181 | static int sigpipe[2]; | |
460b9539 | 182 | |
29601377 | 183 | /** @brief Selected backend */ |
b50cfb8a | 184 | static const struct uaudio *backend; |
29601377 | 185 | |
460b9539 | 186 | static const struct option options[] = { |
187 | { "help", no_argument, 0, 'h' }, | |
188 | { "version", no_argument, 0, 'V' }, | |
189 | { "config", required_argument, 0, 'c' }, | |
190 | { "debug", no_argument, 0, 'd' }, | |
191 | { "no-debug", no_argument, 0, 'D' }, | |
0ca6d097 RK |
192 | { "syslog", no_argument, 0, 's' }, |
193 | { "no-syslog", no_argument, 0, 'S' }, | |
460b9539 | 194 | { 0, 0, 0, 0 } |
195 | }; | |
196 | ||
197 | /* Display usage message and terminate. */ | |
198 | static void help(void) { | |
199 | xprintf("Usage:\n" | |
200 | " disorder-speaker [OPTIONS]\n" | |
201 | "Options:\n" | |
202 | " --help, -h Display usage message\n" | |
203 | " --version, -V Display version number\n" | |
204 | " --config PATH, -c PATH Set configuration file\n" | |
205 | " --debug, -d Turn on debugging\n" | |
0ca6d097 | 206 | " --[no-]syslog Force logging\n" |
460b9539 | 207 | "\n" |
208 | "Speaker process for DisOrder. Not intended to be run\n" | |
209 | "directly.\n"); | |
210 | xfclose(stdout); | |
211 | exit(0); | |
212 | } | |
213 | ||
b50cfb8a RK |
214 | /** @brief Find track @p id, maybe creating it if not found |
215 | * @param id Track ID to find | |
216 | * @param create If nonzero, create track structure of @p id not found | |
217 | * @return Pointer to track structure or NULL | |
218 | */ | |
460b9539 | 219 | static struct track *findtrack(const char *id, int create) { |
220 | struct track *t; | |
221 | ||
222 | D(("findtrack %s %d", id, create)); | |
223 | for(t = tracks; t && strcmp(id, t->id); t = t->next) | |
224 | ; | |
225 | if(!t && create) { | |
226 | t = xmalloc(sizeof *t); | |
227 | t->next = tracks; | |
228 | strcpy(t->id, id); | |
229 | t->fd = -1; | |
230 | tracks = t; | |
460b9539 | 231 | } |
232 | return t; | |
233 | } | |
234 | ||
b50cfb8a RK |
235 | /** @brief Remove track @p id (but do not destroy it) |
236 | * @param id Track ID to remove | |
237 | * @return Track structure or NULL if not found | |
238 | */ | |
460b9539 | 239 | static struct track *removetrack(const char *id) { |
240 | struct track *t, **tt; | |
241 | ||
242 | D(("removetrack %s", id)); | |
243 | for(tt = &tracks; (t = *tt) && strcmp(id, t->id); tt = &t->next) | |
244 | ; | |
245 | if(t) | |
246 | *tt = t->next; | |
247 | return t; | |
248 | } | |
249 | ||
b50cfb8a RK |
250 | /** @brief Destroy a track |
251 | * @param t Track structure | |
252 | */ | |
460b9539 | 253 | static void destroy(struct track *t) { |
254 | D(("destroy %s", t->id)); | |
b50cfb8a RK |
255 | if(t->fd != -1) |
256 | xclose(t->fd); | |
460b9539 | 257 | free(t); |
258 | } | |
259 | ||
1674096e | 260 | /** @brief Read data into a sample buffer |
261 | * @param t Pointer to track | |
262 | * @return 0 on success, -1 on EOF | |
263 | * | |
55f35f2d | 264 | * This is effectively the read callback on @c t->fd. It is called from the |
265 | * main loop whenever the track's file descriptor is readable, assuming the | |
266 | * buffer has not reached the maximum allowed occupancy. | |
1674096e | 267 | */ |
f5a03f58 | 268 | static int speaker_fill(struct track *t) { |
460b9539 | 269 | size_t where, left; |
b50cfb8a | 270 | int n, rc; |
460b9539 | 271 | |
6d2d327c RK |
272 | D(("fill %s: eof=%d used=%zu", |
273 | t->id, t->eof, t->used)); | |
b50cfb8a RK |
274 | if(t->eof) |
275 | return -1; | |
276 | pthread_mutex_lock(&lock); | |
6d2d327c | 277 | if(t->used < sizeof t->buffer) { |
460b9539 | 278 | /* there is room left in the buffer */ |
6d2d327c RK |
279 | where = (t->start + t->used) % sizeof t->buffer; |
280 | /* Get as much data as we can */ | |
b50cfb8a RK |
281 | if(where >= t->start) |
282 | left = (sizeof t->buffer) - where; | |
283 | else | |
284 | left = t->start - where; | |
285 | pthread_mutex_unlock(&lock); | |
460b9539 | 286 | do { |
287 | n = read(t->fd, t->buffer + where, left); | |
288 | } while(n < 0 && errno == EINTR); | |
b50cfb8a | 289 | pthread_mutex_lock(&lock); |
460b9539 | 290 | if(n < 0) { |
b50cfb8a RK |
291 | if(errno != EAGAIN) |
292 | fatal(errno, "error reading sample stream"); | |
293 | rc = 0; | |
294 | } else if(n == 0) { | |
460b9539 | 295 | D(("fill %s: eof detected", t->id)); |
296 | t->eof = 1; | |
b50cfb8a RK |
297 | /* A track always becomes playable at EOF; we're not going to see any |
298 | * more data. */ | |
f5a03f58 | 299 | t->playable = 1; |
b50cfb8a RK |
300 | rc = -1; |
301 | } else { | |
302 | t->used += n; | |
303 | /* A track becomes playable when it (first) fills its buffer. For | |
304 | * 44.1KHz 16-bit stereo this is ~6s of audio data. The latency will | |
305 | * depend how long that takes to decode (hopefuly not very!) */ | |
306 | if(t->used == sizeof t->buffer) | |
307 | t->playable = 1; | |
308 | rc = 0; | |
460b9539 | 309 | } |
460b9539 | 310 | } |
b50cfb8a RK |
311 | pthread_mutex_unlock(&lock); |
312 | return rc; | |
460b9539 | 313 | } |
314 | ||
dac25ef9 RK |
315 | /** @brief Return nonzero if we want to play some audio |
316 | * | |
317 | * We want to play audio if there is a current track; and it is not paused; and | |
318 | * it is playable according to the rules for @ref track::playable. | |
319 | */ | |
320 | static int playable(void) { | |
321 | return playing | |
322 | && !paused | |
323 | && playing->playable; | |
324 | } | |
325 | ||
b50cfb8a | 326 | /** @brief Notify the server what we're up to */ |
460b9539 | 327 | static void report(void) { |
328 | struct speaker_message sm; | |
329 | ||
6d2d327c | 330 | if(playing) { |
460b9539 | 331 | memset(&sm, 0, sizeof sm); |
332 | sm.type = paused ? SM_PAUSED : SM_PLAYING; | |
333 | strcpy(sm.id, playing->id); | |
b50cfb8a RK |
334 | pthread_mutex_lock(&lock); |
335 | sm.data = playing->played / (uaudio_rate * uaudio_channels); | |
336 | pthread_mutex_unlock(&lock); | |
84aa9f93 | 337 | speaker_send(1, &sm); |
460b9539 | 338 | } |
339 | time(&last_report); | |
340 | } | |
341 | ||
b50cfb8a RK |
342 | /** @brief Add a file descriptor to the set to poll() for |
343 | * @param fd File descriptor | |
344 | * @param events Events to wait for e.g. @c POLLIN | |
345 | * @return Slot number | |
346 | */ | |
347 | static int addfd(int fd, int events) { | |
460b9539 | 348 | if(fdno < NFDS) { |
349 | fds[fdno].fd = fd; | |
350 | fds[fdno].events = events; | |
351 | return fdno++; | |
352 | } else | |
353 | return -1; | |
354 | } | |
355 | ||
b50cfb8a RK |
356 | /** @brief Callback to return some sampled data |
357 | * @param buffer Where to put sample data | |
358 | * @param max_samples How many samples to return | |
359 | * @param userdata User data | |
360 | * @return Number of samples written | |
361 | * | |
362 | * See uaudio_callback(). | |
363 | */ | |
364 | static size_t speaker_callback(void *buffer, | |
365 | size_t max_samples, | |
366 | void attribute((unused)) *userdata) { | |
367 | const size_t max_bytes = max_samples * uaudio_sample_size; | |
368 | size_t provided_samples = 0; | |
369 | ||
370 | pthread_mutex_lock(&lock); | |
371 | /* TODO perhaps we should immediately go silent if we've been asked to pause | |
372 | * or cancel the playing track (maybe block in the cancel case and see what | |
373 | * else turns up?) */ | |
374 | if(playing) { | |
375 | if(playing->used > 0) { | |
376 | size_t bytes; | |
377 | /* Compute size of largest contiguous chunk. We get called as often as | |
378 | * necessary so there's no need for cleverness here. */ | |
379 | if(playing->start + playing->used > sizeof playing->buffer) | |
380 | bytes = sizeof playing->buffer - playing->start; | |
381 | else | |
382 | bytes = playing->used; | |
383 | /* Limit to what we were asked for */ | |
384 | if(bytes > max_bytes) | |
385 | bytes = max_bytes; | |
386 | /* Provide it */ | |
387 | memcpy(buffer, playing->buffer + playing->start, bytes); | |
388 | playing->start += bytes; | |
389 | playing->used -= bytes; | |
390 | /* Wrap around to start of buffer */ | |
391 | if(playing->start == sizeof playing->buffer) | |
392 | playing->start = 0; | |
393 | /* See if we've reached the end of the track */ | |
394 | if(playing->used == 0 && playing->eof) | |
395 | write(sigpipe[1], "", 1); | |
396 | provided_samples = bytes / uaudio_sample_size; | |
397 | playing->played += provided_samples; | |
398 | } | |
399 | } | |
400 | /* If we couldn't provide anything at all, play dead air */ | |
401 | /* TODO maybe it would be better to block, in some cases? */ | |
402 | if(!provided_samples) { | |
403 | memset(buffer, 0, max_bytes); | |
404 | provided_samples = max_samples; | |
405 | } | |
406 | pthread_mutex_unlock(&lock); | |
407 | return provided_samples; | |
408 | } | |
572d74ba | 409 | |
5a7c42a8 | 410 | /** @brief Main event loop */ |
55f35f2d | 411 | static void mainloop(void) { |
572d74ba | 412 | struct track *t; |
413 | struct speaker_message sm; | |
b50cfb8a | 414 | int n, fd, stdin_slot, timeout, listen_slot, sigpipe_slot; |
460b9539 | 415 | |
b50cfb8a | 416 | /* Keep going while our parent process is alive */ |
460b9539 | 417 | while(getppid() != 1) { |
b50cfb8a RK |
418 | int force_report = 0; |
419 | ||
460b9539 | 420 | fdno = 0; |
5a7c42a8 | 421 | /* By default we will wait up to a second before thinking about current |
422 | * state. */ | |
423 | timeout = 1000; | |
460b9539 | 424 | /* Always ready for commands from the main server. */ |
425 | stdin_slot = addfd(0, POLLIN); | |
84aa9f93 RK |
426 | /* Also always ready for inbound connections */ |
427 | listen_slot = addfd(listenfd, POLLIN); | |
460b9539 | 428 | /* Try to read sample data for the currently playing track if there is |
429 | * buffer space. */ | |
84aa9f93 RK |
430 | if(playing |
431 | && playing->fd >= 0 | |
432 | && !playing->eof | |
433 | && playing->used < (sizeof playing->buffer)) | |
460b9539 | 434 | playing->slot = addfd(playing->fd, POLLIN); |
5a7c42a8 | 435 | else if(playing) |
460b9539 | 436 | playing->slot = -1; |
460b9539 | 437 | /* If any other tracks don't have a full buffer, try to read sample data |
5a7c42a8 | 438 | * from them. We do this last of all, so that if we run out of slots, |
439 | * nothing important can't be monitored. */ | |
460b9539 | 440 | for(t = tracks; t; t = t->next) |
441 | if(t != playing) { | |
84aa9f93 RK |
442 | if(t->fd >= 0 |
443 | && !t->eof | |
444 | && t->used < sizeof t->buffer) { | |
9d5da576 | 445 | t->slot = addfd(t->fd, POLLIN | POLLHUP); |
460b9539 | 446 | } else |
447 | t->slot = -1; | |
448 | } | |
b50cfb8a | 449 | sigpipe_slot = addfd(sigpipe[1], POLLIN); |
e83d0967 RK |
450 | /* Wait for something interesting to happen */ |
451 | n = poll(fds, fdno, timeout); | |
460b9539 | 452 | if(n < 0) { |
453 | if(errno == EINTR) continue; | |
454 | fatal(errno, "error calling poll"); | |
455 | } | |
84aa9f93 RK |
456 | /* Perhaps a connection has arrived */ |
457 | if(fds[listen_slot].revents & POLLIN) { | |
458 | struct sockaddr_un addr; | |
459 | socklen_t addrlen = sizeof addr; | |
460 | uint32_t l; | |
461 | char id[24]; | |
462 | ||
dc450d30 | 463 | if((fd = accept(listenfd, (struct sockaddr *)&addr, &addrlen)) >= 0) { |
937be4c0 | 464 | blocking(fd); |
84aa9f93 RK |
465 | if(read(fd, &l, sizeof l) < 4) { |
466 | error(errno, "reading length from inbound connection"); | |
467 | xclose(fd); | |
468 | } else if(l >= sizeof id) { | |
469 | error(0, "id length too long"); | |
470 | xclose(fd); | |
471 | } else if(read(fd, id, l) < (ssize_t)l) { | |
472 | error(errno, "reading id from inbound connection"); | |
473 | xclose(fd); | |
474 | } else { | |
475 | id[l] = 0; | |
476 | D(("id %s fd %d", id, fd)); | |
477 | t = findtrack(id, 1/*create*/); | |
918393ff RK |
478 | if (write(fd, "", 1) < 0) /* write an ack */ |
479 | error(errno, "writing ack to inbound connection"); | |
84aa9f93 | 480 | if(t->fd != -1) { |
66bb2e02 | 481 | error(0, "%s: already got a connection", id); |
84aa9f93 RK |
482 | xclose(fd); |
483 | } else { | |
484 | nonblock(fd); | |
485 | t->fd = fd; /* yay */ | |
486 | } | |
487 | } | |
488 | } else | |
489 | error(errno, "accept"); | |
490 | } | |
460b9539 | 491 | /* Perhaps we have a command to process */ |
492 | if(fds[stdin_slot].revents & POLLIN) { | |
5a7c42a8 | 493 | /* There might (in theory) be several commands queued up, but in general |
494 | * this won't be the case, so we don't bother looping around to pick them | |
495 | * all up. */ | |
84aa9f93 RK |
496 | n = speaker_recv(0, &sm); |
497 | /* TODO */ | |
460b9539 | 498 | if(n > 0) |
499 | switch(sm.type) { | |
460b9539 | 500 | case SM_PLAY: |
b50cfb8a RK |
501 | if(playing) |
502 | fatal(0, "got SM_PLAY but already playing something"); | |
460b9539 | 503 | t = findtrack(sm.id, 1); |
84aa9f93 RK |
504 | D(("SM_PLAY %s fd %d", t->id, t->fd)); |
505 | if(t->fd == -1) | |
506 | error(0, "cannot play track because no connection arrived"); | |
460b9539 | 507 | playing = t; |
b50cfb8a | 508 | force_report = 1; |
460b9539 | 509 | break; |
510 | case SM_PAUSE: | |
511 | D(("SM_PAUSE")); | |
512 | paused = 1; | |
b50cfb8a | 513 | force_report = 1; |
460b9539 | 514 | break; |
515 | case SM_RESUME: | |
516 | D(("SM_RESUME")); | |
b50cfb8a RK |
517 | paused = 0; |
518 | force_report = 1; | |
460b9539 | 519 | break; |
520 | case SM_CANCEL: | |
819f5988 | 521 | D(("SM_CANCEL %s", sm.id)); |
460b9539 | 522 | t = removetrack(sm.id); |
523 | if(t) { | |
b50cfb8a | 524 | pthread_mutex_lock(&lock); |
460b9539 | 525 | if(t == playing) { |
819f5988 | 526 | /* scratching the playing track */ |
460b9539 | 527 | sm.type = SM_FINISHED; |
460b9539 | 528 | playing = 0; |
819f5988 RK |
529 | } else { |
530 | /* Could be scratching the playing track before it's quite got | |
531 | * going, or could be just removing a track from the queue. We | |
532 | * log more because there's been a bug here recently than because | |
533 | * it's particularly interesting; the log message will be removed | |
534 | * if no further problems show up. */ | |
535 | info("SM_CANCEL for nonplaying track %s", sm.id); | |
536 | sm.type = SM_STILLBORN; | |
460b9539 | 537 | } |
819f5988 | 538 | strcpy(sm.id, t->id); |
460b9539 | 539 | destroy(t); |
b50cfb8a | 540 | pthread_mutex_unlock(&lock); |
2b2a5fed | 541 | } else { |
819f5988 RK |
542 | /* Probably scratching the playing track well before it's got |
543 | * going, but could indicate a bug, so we log this as an error. */ | |
2b2a5fed | 544 | sm.type = SM_UNKNOWN; |
460b9539 | 545 | error(0, "SM_CANCEL for unknown track %s", sm.id); |
2b2a5fed | 546 | } |
819f5988 | 547 | speaker_send(1, &sm); |
b50cfb8a | 548 | force_report = 1; |
460b9539 | 549 | break; |
550 | case SM_RELOAD: | |
551 | D(("SM_RELOAD")); | |
b50cfb8a RK |
552 | if(config_read(1)) |
553 | error(0, "cannot read configuration"); | |
460b9539 | 554 | info("reloaded configuration"); |
555 | break; | |
556 | default: | |
557 | error(0, "unknown message type %d", sm.type); | |
558 | } | |
559 | } | |
560 | /* Read in any buffered data */ | |
561 | for(t = tracks; t; t = t->next) | |
84aa9f93 RK |
562 | if(t->fd != -1 |
563 | && t->slot != -1 | |
564 | && (fds[t->slot].revents & (POLLIN | POLLHUP))) | |
f5a03f58 | 565 | speaker_fill(t); |
b50cfb8a RK |
566 | /* Drain the signal pipe. We don't care about its contents, merely that it |
567 | * interrupted poll(). */ | |
568 | if(fds[sigpipe_slot].revents & POLLIN) { | |
569 | char buffer[64]; | |
570 | ||
571 | read(sigpipe[0], buffer, sizeof buffer); | |
572 | } | |
573 | if(playing && playing->used == 0 && playing->eof) { | |
574 | /* The playing track is done. Tell the server, and destroy it. */ | |
575 | memset(&sm, 0, sizeof sm); | |
576 | sm.type = SM_FINISHED; | |
577 | strcpy(sm.id, playing->id); | |
578 | speaker_send(1, &sm); | |
579 | removetrack(playing->id); | |
580 | pthread_mutex_lock(&lock); | |
581 | destroy(playing); | |
582 | playing = 0; | |
583 | pthread_mutex_unlock(&lock); | |
584 | /* The server will presumalby send as an SM_PLAY by return */ | |
585 | } | |
586 | /* Impose any state change required by the above */ | |
587 | if(playable()) { | |
588 | if(!activated) { | |
589 | activated = 1; | |
590 | backend->activate(); | |
591 | } | |
592 | } else { | |
593 | if(activated) { | |
594 | activated = 0; | |
595 | backend->deactivate(); | |
596 | } | |
597 | } | |
598 | /* If we've not reported our state for a second do so now. */ | |
599 | if(force_report || time(0) > last_report) | |
460b9539 | 600 | report(); |
601 | } | |
55f35f2d | 602 | } |
603 | ||
604 | int main(int argc, char **argv) { | |
0ca6d097 | 605 | int n, logsyslog = !isatty(2); |
84aa9f93 RK |
606 | struct sockaddr_un addr; |
607 | static const int one = 1; | |
937be4c0 | 608 | struct speaker_message sm; |
38b8221f | 609 | const char *d; |
85cb23d7 | 610 | char *dir; |
b50cfb8a | 611 | struct rlimit rl[1]; |
55f35f2d | 612 | |
613 | set_progname(argv); | |
614 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); | |
0ca6d097 | 615 | while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) { |
55f35f2d | 616 | switch(n) { |
617 | case 'h': help(); | |
3fbdc96d | 618 | case 'V': version("disorder-speaker"); |
55f35f2d | 619 | case 'c': configfile = optarg; break; |
620 | case 'd': debugging = 1; break; | |
621 | case 'D': debugging = 0; break; | |
0ca6d097 RK |
622 | case 'S': logsyslog = 0; break; |
623 | case 's': logsyslog = 1; break; | |
55f35f2d | 624 | default: fatal(0, "invalid option"); |
625 | } | |
626 | } | |
38b8221f | 627 | if((d = getenv("DISORDER_DEBUG_SPEAKER"))) debugging = atoi(d); |
0ca6d097 | 628 | if(logsyslog) { |
55f35f2d | 629 | openlog(progname, LOG_PID, LOG_DAEMON); |
630 | log_default = &log_syslog; | |
631 | } | |
b50cfb8a | 632 | config_uaudio_apis = uaudio_apis; |
c00fce3a | 633 | if(config_read(1)) fatal(0, "cannot read configuration"); |
55f35f2d | 634 | /* ignore SIGPIPE */ |
635 | signal(SIGPIPE, SIG_IGN); | |
55f35f2d | 636 | /* set nice value */ |
637 | xnice(config->nice_speaker); | |
638 | /* change user */ | |
639 | become_mortal(); | |
640 | /* make sure we're not root, whatever the config says */ | |
b50cfb8a RK |
641 | if(getuid() == 0 || geteuid() == 0) |
642 | fatal(0, "do not run as root"); | |
643 | /* Make sure we can't have more than NFDS files open (it would bust our | |
644 | * poll() array) */ | |
645 | if(getrlimit(RLIMIT_NOFILE, rl) < 0) | |
646 | fatal(errno, "getrlimit RLIMIT_NOFILE"); | |
647 | if(rl->rlim_cur > NFDS) { | |
648 | rl->rlim_cur = NFDS; | |
649 | if(setrlimit(RLIMIT_NOFILE, rl) < 0) | |
650 | fatal(errno, "setrlimit to reduce RLIMIT_NOFILE to %lu", | |
651 | (unsigned long)rl->rlim_cur); | |
652 | info("set RLIM_NOFILE to %lu", (unsigned long)rl->rlim_cur); | |
653 | } else | |
654 | info("RLIM_NOFILE is %lu", (unsigned long)rl->rlim_cur); | |
655 | /* create a pipe between the backend callback and the poll() loop */ | |
656 | xpipe(sigpipe); | |
657 | nonblock(sigpipe[0]); | |
658 | /* set up audio backend */ | |
659 | uaudio_set_format(config->sample_format.rate, | |
660 | config->sample_format.channels, | |
661 | config->sample_format.bits, | |
662 | config->sample_format.bits != 8); | |
663 | /* TODO other parameters! */ | |
664 | backend = uaudio_find(config->api); | |
55f35f2d | 665 | /* backend-specific initialization */ |
b50cfb8a | 666 | backend->start(speaker_callback, NULL); |
85cb23d7 RK |
667 | /* create the socket directory */ |
668 | byte_xasprintf(&dir, "%s/speaker", config->home); | |
669 | unlink(dir); /* might be a leftover socket */ | |
a5f3ca1e | 670 | if(mkdir(dir, 0700) < 0 && errno != EEXIST) |
85cb23d7 | 671 | fatal(errno, "error creating %s", dir); |
84aa9f93 RK |
672 | /* set up the listen socket */ |
673 | listenfd = xsocket(PF_UNIX, SOCK_STREAM, 0); | |
674 | memset(&addr, 0, sizeof addr); | |
675 | addr.sun_family = AF_UNIX; | |
85cb23d7 | 676 | snprintf(addr.sun_path, sizeof addr.sun_path, "%s/speaker/socket", |
84aa9f93 RK |
677 | config->home); |
678 | if(unlink(addr.sun_path) < 0 && errno != ENOENT) | |
679 | error(errno, "removing %s", addr.sun_path); | |
680 | xsetsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one); | |
dc450d30 | 681 | if(bind(listenfd, (const struct sockaddr *)&addr, sizeof addr) < 0) |
84aa9f93 RK |
682 | fatal(errno, "error binding socket to %s", addr.sun_path); |
683 | xlisten(listenfd, 128); | |
684 | nonblock(listenfd); | |
685 | info("listening on %s", addr.sun_path); | |
937be4c0 RK |
686 | memset(&sm, 0, sizeof sm); |
687 | sm.type = SM_READY; | |
688 | speaker_send(1, &sm); | |
55f35f2d | 689 | mainloop(); |
460b9539 | 690 | info("stopped (parent terminated)"); |
691 | exit(0); | |
692 | } | |
693 | ||
694 | /* | |
695 | Local Variables: | |
696 | c-basic-offset:2 | |
697 | comment-column:40 | |
698 | fill-column:79 | |
699 | indent-tabs-mode:nil | |
700 | End: | |
701 | */ |