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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> |
460b9539 | 82 | |
83 | #include "configuration.h" | |
84 | #include "syscalls.h" | |
85 | #include "log.h" | |
86 | #include "defs.h" | |
87 | #include "mem.h" | |
ea410ba1 | 88 | #include "speaker-protocol.h" |
460b9539 | 89 | #include "user.h" |
85cb23d7 | 90 | #include "printf.h" |
3fbdc96d | 91 | #include "version.h" |
b50cfb8a | 92 | #include "uaudio.h" |
460b9539 | 93 | |
b50cfb8a RK |
94 | /** @brief Maximum number of FDs to poll for */ |
95 | #define NFDS 1024 | |
e83d0967 | 96 | |
b50cfb8a RK |
97 | /** @brief Track structure |
98 | * | |
99 | * Known tracks are kept in a linked list. Usually there will be at most two | |
100 | * of these but rearranging the queue can cause there to be more. | |
101 | */ | |
102 | struct track { | |
103 | /** @brief Next track */ | |
104 | struct track *next; | |
105 | ||
106 | /** @brief Input file descriptor */ | |
107 | int fd; /* input FD */ | |
108 | ||
109 | /** @brief Track ID */ | |
110 | char id[24]; | |
111 | ||
112 | /** @brief Start position of data in buffer */ | |
113 | size_t start; | |
114 | ||
115 | /** @brief Number of bytes of data in buffer */ | |
116 | size_t used; | |
117 | ||
118 | /** @brief Set @c fd is at EOF */ | |
119 | int eof; | |
120 | ||
121 | /** @brief Total number of samples played */ | |
122 | unsigned long long played; | |
123 | ||
124 | /** @brief Slot in @ref fds */ | |
125 | int slot; | |
126 | ||
127 | /** @brief Set when playable | |
128 | * | |
129 | * A track becomes playable whenever it fills its buffer or reaches EOF; it | |
130 | * stops being playable when it entirely empties its buffer. Tracks start | |
131 | * out life not playable. | |
132 | */ | |
133 | int playable; | |
134 | ||
135 | /** @brief Input buffer | |
136 | * | |
137 | * 1Mbyte is enough for nearly 6s of 44100Hz 16-bit stereo | |
138 | */ | |
139 | char buffer[1048576]; | |
140 | }; | |
460b9539 | 141 | |
b50cfb8a RK |
142 | /** @brief Lock protecting data structures |
143 | * | |
144 | * This lock protects values shared between the main thread and the callback. | |
145 | * It is needed e.g. if changing @ref playing or if modifying buffer pointers. | |
146 | * It is not needed to add a new track, to read values only modified in the | |
147 | * same thread, etc. | |
148 | */ | |
149 | static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; | |
150 | ||
151 | /** @brief Linked list of all prepared tracks */ | |
152 | static struct track *tracks; | |
153 | ||
154 | /** @brief Playing track, or NULL | |
155 | * | |
156 | * This means the DESIRED playing track. It does not reflect any other state | |
157 | * (e.g. activation of uaudio backend). | |
158 | */ | |
159 | static struct track *playing; | |
1c3f1e73 | 160 | |
161 | /** @brief Array of file descriptors for poll() */ | |
b50cfb8a | 162 | static struct pollfd fds[NFDS]; |
1c3f1e73 | 163 | |
164 | /** @brief Next free slot in @ref fds */ | |
b50cfb8a | 165 | static int fdno; |
1c3f1e73 | 166 | |
84aa9f93 RK |
167 | /** @brief Listen socket */ |
168 | static int listenfd; | |
169 | ||
b50cfb8a RK |
170 | /** @brief Timestamp of last potential report to server */ |
171 | static time_t last_report; | |
50ae38dd | 172 | |
b50cfb8a RK |
173 | /** @brief Set when paused */ |
174 | static int paused; | |
50ae38dd | 175 | |
b50cfb8a RK |
176 | /** @brief Set when back end activated */ |
177 | static int activated; | |
178 | ||
179 | /** @brief Signal pipe back into the poll() loop */ | |
180 | static int sigpipe[2]; | |
460b9539 | 181 | |
29601377 | 182 | /** @brief Selected backend */ |
b50cfb8a | 183 | static const struct uaudio *backend; |
29601377 | 184 | |
460b9539 | 185 | static const struct option options[] = { |
186 | { "help", no_argument, 0, 'h' }, | |
187 | { "version", no_argument, 0, 'V' }, | |
188 | { "config", required_argument, 0, 'c' }, | |
189 | { "debug", no_argument, 0, 'd' }, | |
190 | { "no-debug", no_argument, 0, 'D' }, | |
0ca6d097 RK |
191 | { "syslog", no_argument, 0, 's' }, |
192 | { "no-syslog", no_argument, 0, 'S' }, | |
460b9539 | 193 | { 0, 0, 0, 0 } |
194 | }; | |
195 | ||
196 | /* Display usage message and terminate. */ | |
197 | static void help(void) { | |
198 | xprintf("Usage:\n" | |
199 | " disorder-speaker [OPTIONS]\n" | |
200 | "Options:\n" | |
201 | " --help, -h Display usage message\n" | |
202 | " --version, -V Display version number\n" | |
203 | " --config PATH, -c PATH Set configuration file\n" | |
204 | " --debug, -d Turn on debugging\n" | |
0ca6d097 | 205 | " --[no-]syslog Force logging\n" |
460b9539 | 206 | "\n" |
207 | "Speaker process for DisOrder. Not intended to be run\n" | |
208 | "directly.\n"); | |
209 | xfclose(stdout); | |
210 | exit(0); | |
211 | } | |
212 | ||
b50cfb8a RK |
213 | /** @brief Find track @p id, maybe creating it if not found |
214 | * @param id Track ID to find | |
215 | * @param create If nonzero, create track structure of @p id not found | |
216 | * @return Pointer to track structure or NULL | |
217 | */ | |
460b9539 | 218 | static struct track *findtrack(const char *id, int create) { |
219 | struct track *t; | |
220 | ||
221 | D(("findtrack %s %d", id, create)); | |
222 | for(t = tracks; t && strcmp(id, t->id); t = t->next) | |
223 | ; | |
224 | if(!t && create) { | |
225 | t = xmalloc(sizeof *t); | |
226 | t->next = tracks; | |
227 | strcpy(t->id, id); | |
228 | t->fd = -1; | |
229 | tracks = t; | |
460b9539 | 230 | } |
231 | return t; | |
232 | } | |
233 | ||
b50cfb8a RK |
234 | /** @brief Remove track @p id (but do not destroy it) |
235 | * @param id Track ID to remove | |
236 | * @return Track structure or NULL if not found | |
237 | */ | |
460b9539 | 238 | static struct track *removetrack(const char *id) { |
239 | struct track *t, **tt; | |
240 | ||
241 | D(("removetrack %s", id)); | |
242 | for(tt = &tracks; (t = *tt) && strcmp(id, t->id); tt = &t->next) | |
243 | ; | |
244 | if(t) | |
245 | *tt = t->next; | |
246 | return t; | |
247 | } | |
248 | ||
b50cfb8a RK |
249 | /** @brief Destroy a track |
250 | * @param t Track structure | |
251 | */ | |
460b9539 | 252 | static void destroy(struct track *t) { |
253 | D(("destroy %s", t->id)); | |
b50cfb8a RK |
254 | if(t->fd != -1) |
255 | xclose(t->fd); | |
460b9539 | 256 | free(t); |
257 | } | |
258 | ||
1674096e | 259 | /** @brief Read data into a sample buffer |
260 | * @param t Pointer to track | |
261 | * @return 0 on success, -1 on EOF | |
262 | * | |
55f35f2d | 263 | * This is effectively the read callback on @c t->fd. It is called from the |
264 | * main loop whenever the track's file descriptor is readable, assuming the | |
265 | * buffer has not reached the maximum allowed occupancy. | |
1674096e | 266 | */ |
f5a03f58 | 267 | static int speaker_fill(struct track *t) { |
460b9539 | 268 | size_t where, left; |
b50cfb8a | 269 | int n, rc; |
460b9539 | 270 | |
6d2d327c RK |
271 | D(("fill %s: eof=%d used=%zu", |
272 | t->id, t->eof, t->used)); | |
b50cfb8a RK |
273 | if(t->eof) |
274 | return -1; | |
275 | pthread_mutex_lock(&lock); | |
6d2d327c | 276 | if(t->used < sizeof t->buffer) { |
460b9539 | 277 | /* there is room left in the buffer */ |
6d2d327c RK |
278 | where = (t->start + t->used) % sizeof t->buffer; |
279 | /* Get as much data as we can */ | |
b50cfb8a RK |
280 | if(where >= t->start) |
281 | left = (sizeof t->buffer) - where; | |
282 | else | |
283 | left = t->start - where; | |
284 | pthread_mutex_unlock(&lock); | |
460b9539 | 285 | do { |
286 | n = read(t->fd, t->buffer + where, left); | |
287 | } while(n < 0 && errno == EINTR); | |
b50cfb8a | 288 | pthread_mutex_lock(&lock); |
460b9539 | 289 | if(n < 0) { |
b50cfb8a RK |
290 | if(errno != EAGAIN) |
291 | fatal(errno, "error reading sample stream"); | |
292 | rc = 0; | |
293 | } else if(n == 0) { | |
460b9539 | 294 | D(("fill %s: eof detected", t->id)); |
295 | t->eof = 1; | |
b50cfb8a RK |
296 | /* A track always becomes playable at EOF; we're not going to see any |
297 | * more data. */ | |
f5a03f58 | 298 | t->playable = 1; |
b50cfb8a RK |
299 | rc = -1; |
300 | } else { | |
301 | t->used += n; | |
302 | /* A track becomes playable when it (first) fills its buffer. For | |
303 | * 44.1KHz 16-bit stereo this is ~6s of audio data. The latency will | |
304 | * depend how long that takes to decode (hopefuly not very!) */ | |
305 | if(t->used == sizeof t->buffer) | |
306 | t->playable = 1; | |
307 | rc = 0; | |
460b9539 | 308 | } |
460b9539 | 309 | } |
b50cfb8a RK |
310 | pthread_mutex_unlock(&lock); |
311 | return rc; | |
460b9539 | 312 | } |
313 | ||
dac25ef9 RK |
314 | /** @brief Return nonzero if we want to play some audio |
315 | * | |
316 | * We want to play audio if there is a current track; and it is not paused; and | |
317 | * it is playable according to the rules for @ref track::playable. | |
318 | */ | |
319 | static int playable(void) { | |
320 | return playing | |
321 | && !paused | |
322 | && playing->playable; | |
323 | } | |
324 | ||
b50cfb8a | 325 | /** @brief Notify the server what we're up to */ |
460b9539 | 326 | static void report(void) { |
327 | struct speaker_message sm; | |
328 | ||
6d2d327c | 329 | if(playing) { |
460b9539 | 330 | memset(&sm, 0, sizeof sm); |
331 | sm.type = paused ? SM_PAUSED : SM_PLAYING; | |
332 | strcpy(sm.id, playing->id); | |
b50cfb8a RK |
333 | pthread_mutex_lock(&lock); |
334 | sm.data = playing->played / (uaudio_rate * uaudio_channels); | |
335 | pthread_mutex_unlock(&lock); | |
84aa9f93 | 336 | speaker_send(1, &sm); |
460b9539 | 337 | } |
338 | time(&last_report); | |
339 | } | |
340 | ||
b50cfb8a RK |
341 | /** @brief Add a file descriptor to the set to poll() for |
342 | * @param fd File descriptor | |
343 | * @param events Events to wait for e.g. @c POLLIN | |
344 | * @return Slot number | |
345 | */ | |
346 | static int addfd(int fd, int events) { | |
460b9539 | 347 | if(fdno < NFDS) { |
348 | fds[fdno].fd = fd; | |
349 | fds[fdno].events = events; | |
350 | return fdno++; | |
351 | } else | |
352 | return -1; | |
353 | } | |
354 | ||
b50cfb8a RK |
355 | /** @brief Callback to return some sampled data |
356 | * @param buffer Where to put sample data | |
357 | * @param max_samples How many samples to return | |
358 | * @param userdata User data | |
359 | * @return Number of samples written | |
360 | * | |
361 | * See uaudio_callback(). | |
362 | */ | |
363 | static size_t speaker_callback(void *buffer, | |
364 | size_t max_samples, | |
365 | void attribute((unused)) *userdata) { | |
366 | const size_t max_bytes = max_samples * uaudio_sample_size; | |
367 | size_t provided_samples = 0; | |
368 | ||
369 | pthread_mutex_lock(&lock); | |
370 | /* TODO perhaps we should immediately go silent if we've been asked to pause | |
371 | * or cancel the playing track (maybe block in the cancel case and see what | |
372 | * else turns up?) */ | |
373 | if(playing) { | |
374 | if(playing->used > 0) { | |
375 | size_t bytes; | |
376 | /* Compute size of largest contiguous chunk. We get called as often as | |
377 | * necessary so there's no need for cleverness here. */ | |
378 | if(playing->start + playing->used > sizeof playing->buffer) | |
379 | bytes = sizeof playing->buffer - playing->start; | |
380 | else | |
381 | bytes = playing->used; | |
382 | /* Limit to what we were asked for */ | |
383 | if(bytes > max_bytes) | |
384 | bytes = max_bytes; | |
385 | /* Provide it */ | |
386 | memcpy(buffer, playing->buffer + playing->start, bytes); | |
387 | playing->start += bytes; | |
388 | playing->used -= bytes; | |
389 | /* Wrap around to start of buffer */ | |
390 | if(playing->start == sizeof playing->buffer) | |
391 | playing->start = 0; | |
392 | /* See if we've reached the end of the track */ | |
393 | if(playing->used == 0 && playing->eof) | |
394 | write(sigpipe[1], "", 1); | |
395 | provided_samples = bytes / uaudio_sample_size; | |
396 | playing->played += provided_samples; | |
397 | } | |
398 | } | |
399 | /* If we couldn't provide anything at all, play dead air */ | |
400 | /* TODO maybe it would be better to block, in some cases? */ | |
401 | if(!provided_samples) { | |
402 | memset(buffer, 0, max_bytes); | |
403 | provided_samples = max_samples; | |
404 | } | |
405 | pthread_mutex_unlock(&lock); | |
406 | return provided_samples; | |
407 | } | |
572d74ba | 408 | |
5a7c42a8 | 409 | /** @brief Main event loop */ |
55f35f2d | 410 | static void mainloop(void) { |
572d74ba | 411 | struct track *t; |
412 | struct speaker_message sm; | |
b50cfb8a | 413 | int n, fd, stdin_slot, timeout, listen_slot, sigpipe_slot; |
460b9539 | 414 | |
b50cfb8a | 415 | /* Keep going while our parent process is alive */ |
460b9539 | 416 | while(getppid() != 1) { |
b50cfb8a RK |
417 | int force_report = 0; |
418 | ||
460b9539 | 419 | fdno = 0; |
5a7c42a8 | 420 | /* By default we will wait up to a second before thinking about current |
421 | * state. */ | |
422 | timeout = 1000; | |
460b9539 | 423 | /* Always ready for commands from the main server. */ |
424 | stdin_slot = addfd(0, POLLIN); | |
84aa9f93 RK |
425 | /* Also always ready for inbound connections */ |
426 | listen_slot = addfd(listenfd, POLLIN); | |
460b9539 | 427 | /* Try to read sample data for the currently playing track if there is |
428 | * buffer space. */ | |
84aa9f93 RK |
429 | if(playing |
430 | && playing->fd >= 0 | |
431 | && !playing->eof | |
432 | && playing->used < (sizeof playing->buffer)) | |
460b9539 | 433 | playing->slot = addfd(playing->fd, POLLIN); |
5a7c42a8 | 434 | else if(playing) |
460b9539 | 435 | playing->slot = -1; |
460b9539 | 436 | /* If any other tracks don't have a full buffer, try to read sample data |
5a7c42a8 | 437 | * from them. We do this last of all, so that if we run out of slots, |
438 | * nothing important can't be monitored. */ | |
460b9539 | 439 | for(t = tracks; t; t = t->next) |
440 | if(t != playing) { | |
84aa9f93 RK |
441 | if(t->fd >= 0 |
442 | && !t->eof | |
443 | && t->used < sizeof t->buffer) { | |
9d5da576 | 444 | t->slot = addfd(t->fd, POLLIN | POLLHUP); |
460b9539 | 445 | } else |
446 | t->slot = -1; | |
447 | } | |
b50cfb8a | 448 | sigpipe_slot = addfd(sigpipe[1], POLLIN); |
e83d0967 RK |
449 | /* Wait for something interesting to happen */ |
450 | n = poll(fds, fdno, timeout); | |
460b9539 | 451 | if(n < 0) { |
452 | if(errno == EINTR) continue; | |
453 | fatal(errno, "error calling poll"); | |
454 | } | |
84aa9f93 RK |
455 | /* Perhaps a connection has arrived */ |
456 | if(fds[listen_slot].revents & POLLIN) { | |
457 | struct sockaddr_un addr; | |
458 | socklen_t addrlen = sizeof addr; | |
459 | uint32_t l; | |
460 | char id[24]; | |
461 | ||
dc450d30 | 462 | if((fd = accept(listenfd, (struct sockaddr *)&addr, &addrlen)) >= 0) { |
937be4c0 | 463 | blocking(fd); |
84aa9f93 RK |
464 | if(read(fd, &l, sizeof l) < 4) { |
465 | error(errno, "reading length from inbound connection"); | |
466 | xclose(fd); | |
467 | } else if(l >= sizeof id) { | |
468 | error(0, "id length too long"); | |
469 | xclose(fd); | |
470 | } else if(read(fd, id, l) < (ssize_t)l) { | |
471 | error(errno, "reading id from inbound connection"); | |
472 | xclose(fd); | |
473 | } else { | |
474 | id[l] = 0; | |
475 | D(("id %s fd %d", id, fd)); | |
476 | t = findtrack(id, 1/*create*/); | |
918393ff RK |
477 | if (write(fd, "", 1) < 0) /* write an ack */ |
478 | error(errno, "writing ack to inbound connection"); | |
84aa9f93 | 479 | if(t->fd != -1) { |
66bb2e02 | 480 | error(0, "%s: already got a connection", id); |
84aa9f93 RK |
481 | xclose(fd); |
482 | } else { | |
483 | nonblock(fd); | |
484 | t->fd = fd; /* yay */ | |
485 | } | |
486 | } | |
487 | } else | |
488 | error(errno, "accept"); | |
489 | } | |
460b9539 | 490 | /* Perhaps we have a command to process */ |
491 | if(fds[stdin_slot].revents & POLLIN) { | |
5a7c42a8 | 492 | /* There might (in theory) be several commands queued up, but in general |
493 | * this won't be the case, so we don't bother looping around to pick them | |
494 | * all up. */ | |
84aa9f93 RK |
495 | n = speaker_recv(0, &sm); |
496 | /* TODO */ | |
460b9539 | 497 | if(n > 0) |
498 | switch(sm.type) { | |
460b9539 | 499 | case SM_PLAY: |
b50cfb8a RK |
500 | if(playing) |
501 | fatal(0, "got SM_PLAY but already playing something"); | |
460b9539 | 502 | t = findtrack(sm.id, 1); |
84aa9f93 RK |
503 | D(("SM_PLAY %s fd %d", t->id, t->fd)); |
504 | if(t->fd == -1) | |
505 | error(0, "cannot play track because no connection arrived"); | |
460b9539 | 506 | playing = t; |
b50cfb8a | 507 | force_report = 1; |
460b9539 | 508 | break; |
509 | case SM_PAUSE: | |
510 | D(("SM_PAUSE")); | |
511 | paused = 1; | |
b50cfb8a | 512 | force_report = 1; |
460b9539 | 513 | break; |
514 | case SM_RESUME: | |
515 | D(("SM_RESUME")); | |
b50cfb8a RK |
516 | paused = 0; |
517 | force_report = 1; | |
460b9539 | 518 | break; |
519 | case SM_CANCEL: | |
819f5988 | 520 | D(("SM_CANCEL %s", sm.id)); |
460b9539 | 521 | t = removetrack(sm.id); |
522 | if(t) { | |
b50cfb8a | 523 | pthread_mutex_lock(&lock); |
460b9539 | 524 | if(t == playing) { |
819f5988 | 525 | /* scratching the playing track */ |
460b9539 | 526 | sm.type = SM_FINISHED; |
460b9539 | 527 | playing = 0; |
819f5988 RK |
528 | } else { |
529 | /* Could be scratching the playing track before it's quite got | |
530 | * going, or could be just removing a track from the queue. We | |
531 | * log more because there's been a bug here recently than because | |
532 | * it's particularly interesting; the log message will be removed | |
533 | * if no further problems show up. */ | |
534 | info("SM_CANCEL for nonplaying track %s", sm.id); | |
535 | sm.type = SM_STILLBORN; | |
460b9539 | 536 | } |
819f5988 | 537 | strcpy(sm.id, t->id); |
460b9539 | 538 | destroy(t); |
b50cfb8a | 539 | pthread_mutex_unlock(&lock); |
2b2a5fed | 540 | } else { |
819f5988 RK |
541 | /* Probably scratching the playing track well before it's got |
542 | * going, but could indicate a bug, so we log this as an error. */ | |
2b2a5fed | 543 | sm.type = SM_UNKNOWN; |
460b9539 | 544 | error(0, "SM_CANCEL for unknown track %s", sm.id); |
2b2a5fed | 545 | } |
819f5988 | 546 | speaker_send(1, &sm); |
b50cfb8a | 547 | force_report = 1; |
460b9539 | 548 | break; |
549 | case SM_RELOAD: | |
550 | D(("SM_RELOAD")); | |
b50cfb8a RK |
551 | if(config_read(1)) |
552 | error(0, "cannot read configuration"); | |
460b9539 | 553 | info("reloaded configuration"); |
554 | break; | |
555 | default: | |
556 | error(0, "unknown message type %d", sm.type); | |
557 | } | |
558 | } | |
559 | /* Read in any buffered data */ | |
560 | for(t = tracks; t; t = t->next) | |
84aa9f93 RK |
561 | if(t->fd != -1 |
562 | && t->slot != -1 | |
563 | && (fds[t->slot].revents & (POLLIN | POLLHUP))) | |
f5a03f58 | 564 | speaker_fill(t); |
b50cfb8a RK |
565 | /* Drain the signal pipe. We don't care about its contents, merely that it |
566 | * interrupted poll(). */ | |
567 | if(fds[sigpipe_slot].revents & POLLIN) { | |
568 | char buffer[64]; | |
569 | ||
570 | read(sigpipe[0], buffer, sizeof buffer); | |
571 | } | |
572 | if(playing && playing->used == 0 && playing->eof) { | |
573 | /* The playing track is done. Tell the server, and destroy it. */ | |
574 | memset(&sm, 0, sizeof sm); | |
575 | sm.type = SM_FINISHED; | |
576 | strcpy(sm.id, playing->id); | |
577 | speaker_send(1, &sm); | |
578 | removetrack(playing->id); | |
579 | pthread_mutex_lock(&lock); | |
580 | destroy(playing); | |
581 | playing = 0; | |
582 | pthread_mutex_unlock(&lock); | |
583 | /* The server will presumalby send as an SM_PLAY by return */ | |
584 | } | |
585 | /* Impose any state change required by the above */ | |
586 | if(playable()) { | |
587 | if(!activated) { | |
588 | activated = 1; | |
589 | backend->activate(); | |
590 | } | |
591 | } else { | |
592 | if(activated) { | |
593 | activated = 0; | |
594 | backend->deactivate(); | |
595 | } | |
596 | } | |
597 | /* If we've not reported our state for a second do so now. */ | |
598 | if(force_report || time(0) > last_report) | |
460b9539 | 599 | report(); |
600 | } | |
55f35f2d | 601 | } |
602 | ||
603 | int main(int argc, char **argv) { | |
0ca6d097 | 604 | int n, logsyslog = !isatty(2); |
84aa9f93 RK |
605 | struct sockaddr_un addr; |
606 | static const int one = 1; | |
937be4c0 | 607 | struct speaker_message sm; |
38b8221f | 608 | const char *d; |
85cb23d7 | 609 | char *dir; |
b50cfb8a | 610 | struct rlimit rl[1]; |
55f35f2d | 611 | |
612 | set_progname(argv); | |
613 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); | |
0ca6d097 | 614 | while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) { |
55f35f2d | 615 | switch(n) { |
616 | case 'h': help(); | |
3fbdc96d | 617 | case 'V': version("disorder-speaker"); |
55f35f2d | 618 | case 'c': configfile = optarg; break; |
619 | case 'd': debugging = 1; break; | |
620 | case 'D': debugging = 0; break; | |
0ca6d097 RK |
621 | case 'S': logsyslog = 0; break; |
622 | case 's': logsyslog = 1; break; | |
55f35f2d | 623 | default: fatal(0, "invalid option"); |
624 | } | |
625 | } | |
38b8221f | 626 | if((d = getenv("DISORDER_DEBUG_SPEAKER"))) debugging = atoi(d); |
0ca6d097 | 627 | if(logsyslog) { |
55f35f2d | 628 | openlog(progname, LOG_PID, LOG_DAEMON); |
629 | log_default = &log_syslog; | |
630 | } | |
b50cfb8a | 631 | config_uaudio_apis = uaudio_apis; |
c00fce3a | 632 | if(config_read(1)) fatal(0, "cannot read configuration"); |
55f35f2d | 633 | /* ignore SIGPIPE */ |
634 | signal(SIGPIPE, SIG_IGN); | |
55f35f2d | 635 | /* set nice value */ |
636 | xnice(config->nice_speaker); | |
637 | /* change user */ | |
638 | become_mortal(); | |
639 | /* make sure we're not root, whatever the config says */ | |
b50cfb8a RK |
640 | if(getuid() == 0 || geteuid() == 0) |
641 | fatal(0, "do not run as root"); | |
642 | /* Make sure we can't have more than NFDS files open (it would bust our | |
643 | * poll() array) */ | |
644 | if(getrlimit(RLIMIT_NOFILE, rl) < 0) | |
645 | fatal(errno, "getrlimit RLIMIT_NOFILE"); | |
646 | if(rl->rlim_cur > NFDS) { | |
647 | rl->rlim_cur = NFDS; | |
648 | if(setrlimit(RLIMIT_NOFILE, rl) < 0) | |
649 | fatal(errno, "setrlimit to reduce RLIMIT_NOFILE to %lu", | |
650 | (unsigned long)rl->rlim_cur); | |
651 | info("set RLIM_NOFILE to %lu", (unsigned long)rl->rlim_cur); | |
652 | } else | |
653 | info("RLIM_NOFILE is %lu", (unsigned long)rl->rlim_cur); | |
654 | /* create a pipe between the backend callback and the poll() loop */ | |
655 | xpipe(sigpipe); | |
656 | nonblock(sigpipe[0]); | |
657 | /* set up audio backend */ | |
658 | uaudio_set_format(config->sample_format.rate, | |
659 | config->sample_format.channels, | |
660 | config->sample_format.bits, | |
661 | config->sample_format.bits != 8); | |
662 | /* TODO other parameters! */ | |
663 | backend = uaudio_find(config->api); | |
55f35f2d | 664 | /* backend-specific initialization */ |
ba70caca RK |
665 | if(backend->configure) |
666 | backend->configure(); | |
b50cfb8a | 667 | backend->start(speaker_callback, NULL); |
85cb23d7 RK |
668 | /* create the socket directory */ |
669 | byte_xasprintf(&dir, "%s/speaker", config->home); | |
670 | unlink(dir); /* might be a leftover socket */ | |
a5f3ca1e | 671 | if(mkdir(dir, 0700) < 0 && errno != EEXIST) |
85cb23d7 | 672 | fatal(errno, "error creating %s", dir); |
84aa9f93 RK |
673 | /* set up the listen socket */ |
674 | listenfd = xsocket(PF_UNIX, SOCK_STREAM, 0); | |
675 | memset(&addr, 0, sizeof addr); | |
676 | addr.sun_family = AF_UNIX; | |
85cb23d7 | 677 | snprintf(addr.sun_path, sizeof addr.sun_path, "%s/speaker/socket", |
84aa9f93 RK |
678 | config->home); |
679 | if(unlink(addr.sun_path) < 0 && errno != ENOENT) | |
680 | error(errno, "removing %s", addr.sun_path); | |
681 | xsetsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one); | |
dc450d30 | 682 | if(bind(listenfd, (const struct sockaddr *)&addr, sizeof addr) < 0) |
84aa9f93 RK |
683 | fatal(errno, "error binding socket to %s", addr.sun_path); |
684 | xlisten(listenfd, 128); | |
685 | nonblock(listenfd); | |
686 | info("listening on %s", addr.sun_path); | |
937be4c0 RK |
687 | memset(&sm, 0, sizeof sm); |
688 | sm.type = SM_READY; | |
689 | speaker_send(1, &sm); | |
55f35f2d | 690 | mainloop(); |
460b9539 | 691 | info("stopped (parent terminated)"); |
692 | exit(0); | |
693 | } | |
694 | ||
695 | /* | |
696 | Local Variables: | |
697 | c-basic-offset:2 | |
698 | comment-column:40 | |
699 | fill-column:79 | |
700 | indent-tabs-mode:nil | |
701 | End: | |
702 | */ |