460b9539 |
1 | /* |
2 | * This file is part of DisOrder |
3 | * Copyright (C) 2005, 2006 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 | /* This program deliberately does not use the garbage collector even though it |
22 | * might be convenient to do so. This is for two reasons. Firstly some libao |
23 | * drivers are implemented using threads and we do not want to have to deal |
24 | * with potential interactions between threading and garbage collection. |
25 | * Secondly this process needs to be able to respond quickly and this is not |
26 | * compatible with the collector hanging the program even relatively |
27 | * briefly. */ |
28 | |
29 | #include <config.h> |
30 | #include "types.h" |
31 | |
32 | #include <getopt.h> |
33 | #include <stdio.h> |
34 | #include <stdlib.h> |
35 | #include <locale.h> |
36 | #include <syslog.h> |
37 | #include <unistd.h> |
38 | #include <errno.h> |
39 | #include <ao/ao.h> |
40 | #include <string.h> |
41 | #include <assert.h> |
42 | #include <sys/select.h> |
43 | #include <time.h> |
44 | #include <alsa/asoundlib.h> |
45 | |
46 | #include "configuration.h" |
47 | #include "syscalls.h" |
48 | #include "log.h" |
49 | #include "defs.h" |
50 | #include "mem.h" |
51 | #include "speaker.h" |
52 | #include "user.h" |
53 | |
54 | #define BUFFER_SECONDS 5 /* How many seconds of input to |
55 | * buffer. */ |
56 | |
57 | #define FRAMES 4096 /* Frame batch size */ |
58 | |
59 | #define NFDS 256 /* Max FDs to poll for */ |
60 | |
61 | /* Known tracks are kept in a linked list. We don't normally to have |
62 | * more than two - maybe three at the outside. */ |
63 | static struct track { |
64 | struct track *next; /* next track */ |
65 | int fd; /* input FD */ |
66 | char id[24]; /* ID */ |
67 | size_t start, used; /* start + bytes used */ |
68 | int eof; /* input is at EOF */ |
69 | int got_format; /* got format yet? */ |
70 | ao_sample_format format; /* sample format */ |
71 | unsigned long long played; /* number of frames played */ |
72 | char *buffer; /* sample buffer */ |
73 | size_t size; /* sample buffer size */ |
74 | int slot; /* poll array slot */ |
75 | } *tracks, *playing; /* all tracks + playing track */ |
76 | |
77 | static time_t last_report; /* when we last reported */ |
78 | static int paused; /* pause status */ |
79 | static snd_pcm_t *pcm; /* current pcm handle */ |
80 | static ao_sample_format pcm_format; /* current format if aodev != 0 */ |
81 | static size_t bpf; /* bytes per frame */ |
82 | static struct pollfd fds[NFDS]; /* if we need more than that */ |
83 | static int fdno; /* fd number */ |
84 | static snd_pcm_uframes_t pcm_bufsize; /* buffer size */ |
85 | static int forceplay; /* frames to force play */ |
86 | |
87 | static const struct option options[] = { |
88 | { "help", no_argument, 0, 'h' }, |
89 | { "version", no_argument, 0, 'V' }, |
90 | { "config", required_argument, 0, 'c' }, |
91 | { "debug", no_argument, 0, 'd' }, |
92 | { "no-debug", no_argument, 0, 'D' }, |
93 | { 0, 0, 0, 0 } |
94 | }; |
95 | |
96 | /* Display usage message and terminate. */ |
97 | static void help(void) { |
98 | xprintf("Usage:\n" |
99 | " disorder-speaker [OPTIONS]\n" |
100 | "Options:\n" |
101 | " --help, -h Display usage message\n" |
102 | " --version, -V Display version number\n" |
103 | " --config PATH, -c PATH Set configuration file\n" |
104 | " --debug, -d Turn on debugging\n" |
105 | "\n" |
106 | "Speaker process for DisOrder. Not intended to be run\n" |
107 | "directly.\n"); |
108 | xfclose(stdout); |
109 | exit(0); |
110 | } |
111 | |
112 | /* Display version number and terminate. */ |
113 | static void version(void) { |
114 | xprintf("disorder-speaker version %s\n", disorder_version_string); |
115 | xfclose(stdout); |
116 | exit(0); |
117 | } |
118 | |
119 | /* Return the number of bytes per frame in FORMAT. */ |
120 | static size_t bytes_per_frame(const ao_sample_format *format) { |
121 | return format->channels * format->bits / 8; |
122 | } |
123 | |
124 | /* Find track ID, maybe creating it if not found. */ |
125 | static struct track *findtrack(const char *id, int create) { |
126 | struct track *t; |
127 | |
128 | D(("findtrack %s %d", id, create)); |
129 | for(t = tracks; t && strcmp(id, t->id); t = t->next) |
130 | ; |
131 | if(!t && create) { |
132 | t = xmalloc(sizeof *t); |
133 | t->next = tracks; |
134 | strcpy(t->id, id); |
135 | t->fd = -1; |
136 | tracks = t; |
137 | /* The initial input buffer will be the sample format. */ |
138 | t->buffer = (void *)&t->format; |
139 | t->size = sizeof t->format; |
140 | } |
141 | return t; |
142 | } |
143 | |
144 | /* Remove track ID (but do not destroy it). */ |
145 | static struct track *removetrack(const char *id) { |
146 | struct track *t, **tt; |
147 | |
148 | D(("removetrack %s", id)); |
149 | for(tt = &tracks; (t = *tt) && strcmp(id, t->id); tt = &t->next) |
150 | ; |
151 | if(t) |
152 | *tt = t->next; |
153 | return t; |
154 | } |
155 | |
156 | /* Destroy a track. */ |
157 | static void destroy(struct track *t) { |
158 | D(("destroy %s", t->id)); |
159 | if(t->fd != -1) xclose(t->fd); |
160 | if(t->buffer != (void *)&t->format) free(t->buffer); |
161 | free(t); |
162 | } |
163 | |
164 | /* Notice a new FD. */ |
165 | static void acquire(struct track *t, int fd) { |
166 | D(("acquire %s %d", t->id, fd)); |
167 | if(t->fd != -1) |
168 | xclose(t->fd); |
169 | t->fd = fd; |
170 | nonblock(fd); |
171 | } |
172 | |
173 | /* Read data into a sample buffer. Return 0 on success, -1 on EOF. */ |
174 | static int fill(struct track *t) { |
175 | size_t where, left; |
176 | int n; |
177 | |
178 | D(("fill %s: eof=%d used=%zu size=%zu got_format=%d", |
179 | t->id, t->eof, t->used, t->size, t->got_format)); |
180 | if(t->eof) return -1; |
181 | if(t->used < t->size) { |
182 | /* there is room left in the buffer */ |
183 | where = (t->start + t->used) % t->size; |
184 | if(t->got_format) { |
185 | /* We are reading audio data, get as much as we can */ |
186 | if(where >= t->start) left = t->size - where; |
187 | else left = t->start - where; |
188 | } else |
189 | /* We are still waiting for the format, only get that */ |
190 | left = sizeof (ao_sample_format) - t->used; |
191 | do { |
192 | n = read(t->fd, t->buffer + where, left); |
193 | } while(n < 0 && errno == EINTR); |
194 | if(n < 0) { |
195 | if(errno != EAGAIN) fatal(errno, "error reading sample stream"); |
196 | return 0; |
197 | } |
198 | if(n == 0) { |
199 | D(("fill %s: eof detected", t->id)); |
200 | t->eof = 1; |
201 | return -1; |
202 | } |
203 | t->used += n; |
204 | if(!t->got_format && t->used >= sizeof (ao_sample_format)) { |
205 | assert(t->used == sizeof (ao_sample_format)); |
206 | /* Check that our assumptions are met. */ |
207 | if(t->format.bits & 7) |
208 | fatal(0, "bits per sample not a multiple of 8"); |
209 | /* Make a new buffer for audio data. */ |
210 | t->size = bytes_per_frame(&t->format) * t->format.rate * BUFFER_SECONDS; |
211 | t->buffer = xmalloc(t->size); |
212 | t->used = 0; |
213 | t->got_format = 1; |
214 | D(("got format for %s", t->id)); |
215 | } |
216 | } |
217 | return 0; |
218 | } |
219 | |
220 | /* Return true if A and B denote identical libao formats, else false. */ |
221 | static int formats_equal(const ao_sample_format *a, |
222 | const ao_sample_format *b) { |
223 | return (a->bits == b->bits |
224 | && a->rate == b->rate |
225 | && a->channels == b->channels |
226 | && a->byte_format == b->byte_format); |
227 | } |
228 | |
229 | /* Close the sound device. */ |
230 | static void idle(void) { |
231 | int err; |
232 | |
233 | D(("idle")); |
234 | if(pcm) { |
235 | if((err = snd_pcm_nonblock(pcm, 0)) < 0) |
236 | fatal(0, "error calling snd_pcm_nonblock: %d", err); |
237 | D(("draining pcm")); |
238 | snd_pcm_drain(pcm); |
239 | D(("closing pcm")); |
240 | snd_pcm_close(pcm); |
241 | pcm = 0; |
242 | forceplay = 0; |
243 | D(("released audio device")); |
244 | } |
245 | } |
246 | |
247 | /* Abandon the current track */ |
248 | static void abandon(void) { |
249 | struct speaker_message sm; |
250 | |
251 | D(("abandon")); |
252 | memset(&sm, 0, sizeof sm); |
253 | sm.type = SM_FINISHED; |
254 | strcpy(sm.id, playing->id); |
255 | speaker_send(1, &sm, 0); |
256 | removetrack(playing->id); |
257 | destroy(playing); |
258 | playing = 0; |
259 | forceplay = 0; |
260 | } |
261 | |
262 | /* Make sure the sound device is open and has the right sample format. Return |
263 | * 0 on success and -1 on error. */ |
264 | static int activate(void) { |
265 | int err; |
266 | snd_pcm_hw_params_t *hwparams; |
267 | snd_pcm_sw_params_t *swparams; |
268 | int sample_format = 0; |
269 | unsigned rate; |
270 | |
271 | /* If we don't know the format yet we cannot start. */ |
272 | if(!playing->got_format) { |
273 | D((" - not got format for %s", playing->id)); |
274 | return -1; |
275 | } |
276 | /* If we need to change format then close the current device. */ |
277 | if(pcm && !formats_equal(&playing->format, &pcm_format)) |
278 | idle(); |
279 | if(!pcm) { |
280 | D(("snd_pcm_open")); |
281 | if((err = snd_pcm_open(&pcm, |
282 | config->device, |
283 | SND_PCM_STREAM_PLAYBACK, |
284 | SND_PCM_NONBLOCK))) { |
285 | error(0, "error from snd_pcm_open: %d", err); |
286 | goto error; |
287 | } |
288 | snd_pcm_hw_params_alloca(&hwparams); |
289 | D(("set up hw params")); |
290 | if((err = snd_pcm_hw_params_any(pcm, hwparams)) < 0) |
291 | fatal(0, "error from snd_pcm_hw_params_any: %d", err); |
292 | if((err = snd_pcm_hw_params_set_access(pcm, hwparams, |
293 | SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) |
294 | fatal(0, "error from snd_pcm_hw_params_set_access: %d", err); |
295 | switch(playing->format.bits) { |
296 | case 8: |
297 | sample_format = SND_PCM_FORMAT_S8; |
298 | break; |
299 | case 16: |
300 | switch(playing->format.byte_format) { |
301 | case AO_FMT_NATIVE: sample_format = SND_PCM_FORMAT_S16; break; |
302 | case AO_FMT_LITTLE: sample_format = SND_PCM_FORMAT_S16_LE; break; |
303 | case AO_FMT_BIG: sample_format = SND_PCM_FORMAT_S16_BE; break; |
304 | error(0, "unrecognized byte format %d", playing->format.byte_format); |
305 | goto fatal; |
306 | } |
307 | break; |
308 | default: |
309 | error(0, "unsupported sample size %d", playing->format.bits); |
310 | goto fatal; |
311 | } |
312 | if((err = snd_pcm_hw_params_set_format(pcm, hwparams, |
313 | sample_format)) < 0) { |
314 | error(0, "error from snd_pcm_hw_params_set_format (%d): %d", |
315 | sample_format, err); |
316 | goto fatal; |
317 | } |
318 | rate = playing->format.rate; |
319 | if((err = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rate, 0)) < 0) { |
320 | error(0, "error from snd_pcm_hw_params_set_rate (%d): %d", |
321 | playing->format.rate, err); |
322 | goto fatal; |
323 | } |
324 | if(rate != (unsigned)playing->format.rate) |
325 | info("want rate %d, got %u", playing->format.rate, rate); |
326 | if((err = snd_pcm_hw_params_set_channels(pcm, hwparams, |
327 | playing->format.channels)) < 0) { |
328 | error(0, "error from snd_pcm_hw_params_set_channels (%d): %d", |
329 | playing->format.channels, err); |
330 | goto fatal; |
331 | } |
332 | pcm_bufsize = 3 * FRAMES; |
333 | if((err = snd_pcm_hw_params_set_buffer_size_near(pcm, hwparams, |
334 | &pcm_bufsize)) < 0) |
335 | fatal(0, "error from snd_pcm_hw_params_set_buffer_size (%d): %d", |
336 | 3 * FRAMES, err); |
337 | if(pcm_bufsize != 3 * FRAMES) |
338 | info("asked for PCM buffer of %d frames, got %d", |
339 | 3 * FRAMES, (int)pcm_bufsize); |
340 | if((err = snd_pcm_hw_params(pcm, hwparams)) < 0) |
341 | fatal(0, "error calling snd_pcm_hw_params: %d", err); |
342 | D(("set up sw params")); |
343 | snd_pcm_sw_params_alloca(&swparams); |
344 | if((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) |
345 | fatal(0, "error calling snd_pcm_sw_params_current: %d", err); |
346 | if((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, FRAMES)) < 0) |
347 | fatal(0, "error calling snd_pcm_sw_params_set_avail_min %d: %d", |
348 | FRAMES, err); |
349 | if((err = snd_pcm_sw_params(pcm, swparams)) < 0) |
350 | fatal(0, "error calling snd_pcm_sw_params: %d", err); |
351 | pcm_format = playing->format; |
352 | bpf = bytes_per_frame(&pcm_format); |
353 | D(("acquired audio device")); |
354 | } |
355 | return 0; |
356 | fatal: |
357 | abandon(); |
358 | error: |
359 | /* We assume the error is temporary and that we'll retry in a bit. */ |
360 | if(pcm) { |
361 | snd_pcm_close(pcm); |
362 | pcm = 0; |
363 | } |
364 | return -1; |
365 | } |
366 | |
367 | /* Check to see whether the current track has finished playing */ |
368 | static void maybe_finished(void) { |
369 | if(playing |
370 | && playing->eof |
371 | && (!playing->got_format |
372 | || playing->used < bytes_per_frame(&playing->format))) |
373 | abandon(); |
374 | } |
375 | |
376 | static void play(size_t frames) { |
377 | snd_pcm_sframes_t written_frames; |
378 | size_t avail_bytes, avail_frames, written_bytes; |
379 | int err; |
380 | |
381 | if(activate()) { |
382 | if(playing) |
383 | forceplay = frames; |
384 | else |
385 | forceplay = 0; /* Must have called abandon() */ |
386 | return; |
387 | } |
388 | D(("play: play %zu/%zu%s %dHz %db %dc", frames, playing->used / bpf, |
389 | playing->eof ? " EOF" : "", |
390 | playing->format.rate, |
391 | playing->format.bits, |
392 | playing->format.channels)); |
393 | /* If we haven't got enough bytes yet wait until we have. Exception: when |
394 | * we are at eof. */ |
395 | if(playing->used < frames * bpf && !playing->eof) { |
396 | forceplay = frames; |
397 | return; |
398 | } |
399 | /* We have got enough data so don't force play again */ |
400 | forceplay = 0; |
401 | /* Figure out how many frames there are available to write */ |
402 | if(playing->start + playing->used > playing->size) |
403 | avail_bytes = playing->size - playing->start; |
404 | else |
405 | avail_bytes = playing->used; |
406 | avail_frames = avail_bytes / bpf; |
407 | if(avail_frames > frames) |
408 | avail_frames = frames; |
409 | if(!avail_frames) |
410 | return; |
411 | written_frames = snd_pcm_writei(pcm, |
412 | playing->buffer + playing->start, |
413 | avail_frames); |
414 | D(("actually play %zu frames, wrote %d", |
415 | avail_frames, (int)written_frames)); |
416 | if(written_frames < 0) { |
417 | switch(written_frames) { |
418 | case -EPIPE: /* underrun */ |
419 | error(0, "snd_pcm_writei reports underrun"); |
420 | if((err = snd_pcm_prepare(pcm)) < 0) |
421 | fatal(0, "error calling snd_pcm_prepare: %d", err); |
422 | return; |
423 | case -EAGAIN: |
424 | return; |
425 | default: |
426 | fatal(0, "error calling snd_pcm_writei: %d", (int)written_frames); |
427 | } |
428 | } |
429 | written_bytes = written_frames * bpf; |
430 | playing->start += written_bytes; |
431 | playing->used -= written_bytes; |
432 | playing->played += written_frames; |
433 | /* If the pointer is at the end of the buffer (or the buffer is completely |
434 | * empty) wrap it back to the start. */ |
435 | if(!playing->used || playing->start == playing->size) |
436 | playing->start = 0; |
437 | frames -= written_frames; |
438 | } |
439 | |
440 | /* Notify the server what we're up to. */ |
441 | static void report(void) { |
442 | struct speaker_message sm; |
443 | |
444 | if(playing && playing->buffer != (void *)&playing->format) { |
445 | memset(&sm, 0, sizeof sm); |
446 | sm.type = paused ? SM_PAUSED : SM_PLAYING; |
447 | strcpy(sm.id, playing->id); |
448 | sm.data = playing->played / playing->format.rate; |
449 | speaker_send(1, &sm, 0); |
450 | } |
451 | time(&last_report); |
452 | } |
453 | |
454 | static int addfd(int fd, int events) { |
455 | if(fdno < NFDS) { |
456 | fds[fdno].fd = fd; |
457 | fds[fdno].events = events; |
458 | return fdno++; |
459 | } else |
460 | return -1; |
461 | } |
462 | |
463 | int main(int argc, char **argv) { |
464 | int n, fd, stdin_slot, alsa_slots, alsa_nslots = -1, err; |
465 | unsigned short alsa_revents; |
466 | struct track *t; |
467 | struct speaker_message sm; |
468 | |
469 | set_progname(argv); |
470 | mem_init(0); |
471 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); |
472 | while((n = getopt_long(argc, argv, "hVc:dD", options, 0)) >= 0) { |
473 | switch(n) { |
474 | case 'h': help(); |
475 | case 'V': version(); |
476 | case 'c': configfile = optarg; break; |
477 | case 'd': debugging = 1; break; |
478 | case 'D': debugging = 0; break; |
479 | default: fatal(0, "invalid option"); |
480 | } |
481 | } |
482 | if(getenv("DISORDER_DEBUG_SPEAKER")) debugging = 1; |
483 | /* If stderr is a TTY then log there, otherwise to syslog. */ |
484 | if(!isatty(2)) { |
485 | openlog(progname, LOG_PID, LOG_DAEMON); |
486 | log_default = &log_syslog; |
487 | } |
488 | if(config_read()) fatal(0, "cannot read configuration"); |
489 | /* ignore SIGPIPE */ |
490 | signal(SIGPIPE, SIG_IGN); |
491 | /* set nice value */ |
492 | xnice(config->nice_speaker); |
493 | /* change user */ |
494 | become_mortal(); |
495 | /* make sure we're not root, whatever the config says */ |
496 | if(getuid() == 0 || geteuid() == 0) fatal(0, "do not run as root"); |
497 | info("started"); |
498 | while(getppid() != 1) { |
499 | fdno = 0; |
500 | /* Always ready for commands from the main server. */ |
501 | stdin_slot = addfd(0, POLLIN); |
502 | /* Try to read sample data for the currently playing track if there is |
503 | * buffer space. */ |
504 | if(playing && !playing->eof && playing->used < playing->size) { |
505 | playing->slot = addfd(playing->fd, POLLIN); |
506 | } else if(playing) |
507 | playing->slot = -1; |
508 | /* If forceplay is set then wait until it succeeds before waiting on the |
509 | * sound device. */ |
510 | if(pcm && !forceplay) { |
511 | alsa_slots = fdno; |
512 | alsa_nslots = snd_pcm_poll_descriptors(pcm, &fds[fdno], NFDS - fdno); |
513 | fdno += alsa_nslots; |
514 | } else |
515 | alsa_slots = -1; |
516 | /* If any other tracks don't have a full buffer, try to read sample data |
517 | * from them. */ |
518 | for(t = tracks; t; t = t->next) |
519 | if(t != playing) { |
520 | if(!t->eof && t->used < t->size) { |
521 | t->slot = addfd(t->fd, POLLIN); |
522 | } else |
523 | t->slot = -1; |
524 | } |
525 | /* Wait up to a second before thinking about current state */ |
526 | n = poll(fds, fdno, 1000); |
527 | if(n < 0) { |
528 | if(errno == EINTR) continue; |
529 | fatal(errno, "error calling poll"); |
530 | } |
531 | /* Play some sound before doing anything else */ |
532 | if(alsa_slots != -1) { |
533 | if((err = snd_pcm_poll_descriptors_revents(pcm, |
534 | &fds[alsa_slots], |
535 | alsa_nslots, |
536 | &alsa_revents)) < 0) |
537 | fatal(0, "error calling snd_pcm_poll_descriptors_revents: %d", err); |
538 | if(alsa_revents & POLLOUT) |
539 | play(3 * FRAMES); |
540 | } else { |
541 | /* Some attempt to play must have failed */ |
542 | if(playing && !paused) |
543 | play(forceplay); |
544 | else |
545 | forceplay = 0; /* just in case */ |
546 | } |
547 | /* Perhaps we have a command to process */ |
548 | if(fds[stdin_slot].revents & POLLIN) { |
549 | n = speaker_recv(0, &sm, &fd); |
550 | if(n > 0) |
551 | switch(sm.type) { |
552 | case SM_PREPARE: |
553 | D(("SM_PREPARE %s %d", sm.id, fd)); |
554 | if(fd == -1) fatal(0, "got SM_PREPARE but no file descriptor"); |
555 | t = findtrack(sm.id, 1); |
556 | acquire(t, fd); |
557 | break; |
558 | case SM_PLAY: |
559 | D(("SM_PLAY %s %d", sm.id, fd)); |
560 | if(playing) fatal(0, "got SM_PLAY but already playing something"); |
561 | t = findtrack(sm.id, 1); |
562 | if(fd != -1) acquire(t, fd); |
563 | playing = t; |
564 | play(pcm_bufsize); |
565 | report(); |
566 | break; |
567 | case SM_PAUSE: |
568 | D(("SM_PAUSE")); |
569 | paused = 1; |
570 | report(); |
571 | break; |
572 | case SM_RESUME: |
573 | D(("SM_RESUME")); |
574 | if(paused) { |
575 | paused = 0; |
576 | if(playing) |
577 | play(pcm_bufsize); |
578 | } |
579 | report(); |
580 | break; |
581 | case SM_CANCEL: |
582 | D(("SM_CANCEL %s", sm.id)); |
583 | t = removetrack(sm.id); |
584 | if(t) { |
585 | if(t == playing) { |
586 | sm.type = SM_FINISHED; |
587 | strcpy(sm.id, playing->id); |
588 | speaker_send(1, &sm, 0); |
589 | playing = 0; |
590 | } |
591 | destroy(t); |
592 | } else |
593 | error(0, "SM_CANCEL for unknown track %s", sm.id); |
594 | report(); |
595 | break; |
596 | case SM_RELOAD: |
597 | D(("SM_RELOAD")); |
598 | if(config_read()) error(0, "cannot read configuration"); |
599 | info("reloaded configuration"); |
600 | break; |
601 | default: |
602 | error(0, "unknown message type %d", sm.type); |
603 | } |
604 | } |
605 | /* Read in any buffered data */ |
606 | for(t = tracks; t; t = t->next) |
607 | if(t->slot != -1 && (fds[t->slot].revents & POLLIN)) |
608 | fill(t); |
609 | /* We might be able to play now */ |
610 | if(pcm && forceplay && playing && !paused) |
611 | play(forceplay); |
612 | /* Maybe we finished playing a track somewhere in the above */ |
613 | maybe_finished(); |
614 | /* If we don't need the sound device for now then close it for the benefit |
615 | * of anyone else who wants it. */ |
616 | if((!playing || paused) && pcm) |
617 | idle(); |
618 | /* If we've not reported out state for a second do so now. */ |
619 | if(time(0) > last_report) |
620 | report(); |
621 | } |
622 | info("stopped (parent terminated)"); |
623 | exit(0); |
624 | } |
625 | |
626 | /* |
627 | Local Variables: |
628 | c-basic-offset:2 |
629 | comment-column:40 |
630 | fill-column:79 |
631 | indent-tabs-mode:nil |
632 | End: |
633 | */ |