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e83d0967 RK |
1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2007 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 | */ | |
28bacdc0 RK |
20 | /** @file clients/playrtp.c |
21 | * @brief RTP player | |
22 | * | |
b0fdc63d | 23 | * This player supports Linux (<a href="http://www.alsa-project.org/">ALSA</a>) |
24 | * and Apple Mac (<a | |
25 | * href="http://developer.apple.com/audio/coreaudio.html">Core Audio</a>) | |
26 | * systems. There is no support for Microsoft Windows yet, and that will in | |
27 | * fact probably an entirely separate program. | |
28 | * | |
189e9830 RK |
29 | * The program runs (at least) three threads. listen_thread() is responsible |
30 | * for reading RTP packets off the wire and adding them to the linked list @ref | |
31 | * received_packets, assuming they are basically sound. queue_thread() takes | |
32 | * packets off this linked list and adds them to @ref packets (an operation | |
33 | * which might be much slower due to contention for @ref lock). | |
b0fdc63d | 34 | * |
35 | * The main thread is responsible for actually playing audio. In ALSA this | |
36 | * means it waits until ALSA says it's ready for more audio which it then | |
c593cf7c | 37 | * plays. See @ref clients/playrtp-alsa.c. |
b0fdc63d | 38 | * |
8e3fe3d8 | 39 | * In Core Audio the main thread is only responsible for starting and stopping |
b0fdc63d | 40 | * play: the system does the actual playback in its own private thread, and |
c593cf7c | 41 | * calls adioproc() to fetch the audio data. See @ref |
42 | * clients/playrtp-coreaudio.c. | |
b0fdc63d | 43 | * |
44 | * Sometimes it happens that there is no audio available to play. This may | |
45 | * because the server went away, or a packet was dropped, or the server | |
46 | * deliberately did not send any sound because it encountered a silence. | |
189e9830 RK |
47 | * |
48 | * Assumptions: | |
49 | * - it is safe to read uint32_t values without a lock protecting them | |
28bacdc0 | 50 | */ |
e83d0967 RK |
51 | |
52 | #include <config.h> | |
53 | #include "types.h" | |
54 | ||
55 | #include <getopt.h> | |
56 | #include <stdio.h> | |
57 | #include <stdlib.h> | |
58 | #include <sys/socket.h> | |
59 | #include <sys/types.h> | |
60 | #include <sys/socket.h> | |
61 | #include <netdb.h> | |
62 | #include <pthread.h> | |
0b75463f | 63 | #include <locale.h> |
2c7c9eae | 64 | #include <sys/uio.h> |
28bacdc0 | 65 | #include <string.h> |
8e3fe3d8 | 66 | #include <assert.h> |
c593cf7c | 67 | #include <errno.h> |
e3426f7b | 68 | #include <netinet/in.h> |
2d2effe2 | 69 | #include <sys/time.h> |
a99c4e9a | 70 | #include <sys/un.h> |
9fbe0996 | 71 | #include <unistd.h> |
e9b635a3 RK |
72 | #include <sys/mman.h> |
73 | #include <fcntl.h> | |
e83d0967 RK |
74 | |
75 | #include "log.h" | |
76 | #include "mem.h" | |
77 | #include "configuration.h" | |
78 | #include "addr.h" | |
79 | #include "syscalls.h" | |
80 | #include "rtp.h" | |
0b75463f | 81 | #include "defs.h" |
28bacdc0 RK |
82 | #include "vector.h" |
83 | #include "heap.h" | |
189e9830 | 84 | #include "timeval.h" |
a7e9570a | 85 | #include "client.h" |
8e3fe3d8 | 86 | #include "playrtp.h" |
a99c4e9a | 87 | #include "inputline.h" |
e83d0967 | 88 | |
1153fd23 | 89 | #define readahead linux_headers_are_borked |
90 | ||
e3426f7b RK |
91 | /** @brief Obsolete synonym */ |
92 | #ifndef IPV6_JOIN_GROUP | |
93 | # define IPV6_JOIN_GROUP IPV6_ADD_MEMBERSHIP | |
94 | #endif | |
95 | ||
0b75463f | 96 | /** @brief RTP socket */ |
e83d0967 RK |
97 | static int rtpfd; |
98 | ||
345ebe66 RK |
99 | /** @brief Log output */ |
100 | static FILE *logfp; | |
101 | ||
0b75463f | 102 | /** @brief Output device */ |
8e3fe3d8 | 103 | const char *device; |
0b75463f | 104 | |
9086a105 | 105 | /** @brief Minimum low watermark |
0b75463f | 106 | * |
107 | * We'll stop playing if there's only this many samples in the buffer. */ | |
c593cf7c | 108 | unsigned minbuffer = 2 * 44100 / 10; /* 0.2 seconds */ |
0b75463f | 109 | |
9086a105 | 110 | /** @brief Buffer high watermark |
1153fd23 | 111 | * |
112 | * We'll only start playing when this many samples are available. */ | |
8d0c14d7 | 113 | static unsigned readahead = 2 * 2 * 44100; |
0b75463f | 114 | |
9086a105 RK |
115 | /** @brief Maximum buffer size |
116 | * | |
117 | * We'll stop reading from the network if we have this many samples. */ | |
118 | static unsigned maxbuffer; | |
119 | ||
189e9830 RK |
120 | /** @brief Received packets |
121 | * Protected by @ref receive_lock | |
122 | * | |
123 | * Received packets are added to this list, and queue_thread() picks them off | |
124 | * it and adds them to @ref packets. Whenever a packet is added to it, @ref | |
125 | * receive_cond is signalled. | |
126 | */ | |
8e3fe3d8 | 127 | struct packet *received_packets; |
189e9830 RK |
128 | |
129 | /** @brief Tail of @ref received_packets | |
130 | * Protected by @ref receive_lock | |
131 | */ | |
8e3fe3d8 | 132 | struct packet **received_tail = &received_packets; |
189e9830 RK |
133 | |
134 | /** @brief Lock protecting @ref received_packets | |
135 | * | |
136 | * Only listen_thread() and queue_thread() ever hold this lock. It is vital | |
137 | * that queue_thread() not hold it any longer than it strictly has to. */ | |
8e3fe3d8 | 138 | pthread_mutex_t receive_lock = PTHREAD_MUTEX_INITIALIZER; |
189e9830 RK |
139 | |
140 | /** @brief Condition variable signalled when @ref received_packets is updated | |
141 | * | |
142 | * Used by listen_thread() to notify queue_thread() that it has added another | |
143 | * packet to @ref received_packets. */ | |
8e3fe3d8 | 144 | pthread_cond_t receive_cond = PTHREAD_COND_INITIALIZER; |
189e9830 RK |
145 | |
146 | /** @brief Length of @ref received_packets */ | |
8e3fe3d8 | 147 | uint32_t nreceived; |
28bacdc0 RK |
148 | |
149 | /** @brief Binary heap of received packets */ | |
8e3fe3d8 | 150 | struct pheap packets; |
28bacdc0 | 151 | |
189e9830 RK |
152 | /** @brief Total number of samples available |
153 | * | |
154 | * We make this volatile because we inspect it without a protecting lock, | |
155 | * so the usual pthread_* guarantees aren't available. | |
156 | */ | |
8e3fe3d8 | 157 | volatile uint32_t nsamples; |
0b75463f | 158 | |
159 | /** @brief Timestamp of next packet to play. | |
160 | * | |
161 | * This is set to the timestamp of the last packet, plus the number of | |
09ee2f0d | 162 | * samples it contained. Only valid if @ref active is nonzero. |
0b75463f | 163 | */ |
8e3fe3d8 | 164 | uint32_t next_timestamp; |
e83d0967 | 165 | |
09ee2f0d | 166 | /** @brief True if actively playing |
167 | * | |
168 | * This is true when playing and false when just buffering. */ | |
8e3fe3d8 | 169 | int active; |
09ee2f0d | 170 | |
189e9830 | 171 | /** @brief Lock protecting @ref packets */ |
8e3fe3d8 | 172 | pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; |
189e9830 RK |
173 | |
174 | /** @brief Condition variable signalled whenever @ref packets is changed */ | |
8e3fe3d8 | 175 | pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
2c7c9eae | 176 | |
146e86fb | 177 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 178 | # define DEFAULT_BACKEND playrtp_alsa |
a9f0ad12 | 179 | #elif HAVE_SYS_SOUNDCARD_H || EMPEG_HOST |
c593cf7c | 180 | # define DEFAULT_BACKEND playrtp_oss |
181 | #elif HAVE_COREAUDIO_AUDIOHARDWARE_H | |
182 | # define DEFAULT_BACKEND playrtp_coreaudio | |
183 | #else | |
184 | # error No known backend | |
185 | #endif | |
186 | ||
187 | /** @brief Backend to play with */ | |
188 | static void (*backend)(void) = &DEFAULT_BACKEND; | |
189 | ||
8e3fe3d8 | 190 | HEAP_DEFINE(pheap, struct packet *, lt_packet); |
e83d0967 | 191 | |
a99c4e9a RK |
192 | /** @brief Control socket or NULL */ |
193 | const char *control_socket; | |
194 | ||
b28bddbb RK |
195 | /** @brief Buffer for debugging dump |
196 | * | |
197 | * The debug dump is enabled by the @c --dump option. It records the last 20s | |
198 | * of audio to the specified file (which will be about 3.5Mbytes). The file is | |
199 | * written as as ring buffer, so the start point will progress through it. | |
200 | * | |
201 | * Use clients/dump2wav to convert this to a WAV file, which can then be loaded | |
202 | * into (e.g.) Audacity for further inspection. | |
203 | * | |
204 | * All three backends (ALSA, OSS, Core Audio) now support this option. | |
205 | * | |
206 | * The idea is to allow the user a few seconds to react to an audible artefact. | |
207 | */ | |
e9b635a3 | 208 | int16_t *dump_buffer; |
b28bddbb RK |
209 | |
210 | /** @brief Current index within debugging dump */ | |
e9b635a3 | 211 | size_t dump_index; |
b28bddbb RK |
212 | |
213 | /** @brief Size of debugging dump in samples */ | |
214 | size_t dump_size = 44100/*Hz*/ * 2/*channels*/ * 20/*seconds*/; | |
e9b635a3 | 215 | |
e83d0967 RK |
216 | static const struct option options[] = { |
217 | { "help", no_argument, 0, 'h' }, | |
218 | { "version", no_argument, 0, 'V' }, | |
219 | { "debug", no_argument, 0, 'd' }, | |
0b75463f | 220 | { "device", required_argument, 0, 'D' }, |
1153fd23 | 221 | { "min", required_argument, 0, 'm' }, |
9086a105 | 222 | { "max", required_argument, 0, 'x' }, |
1153fd23 | 223 | { "buffer", required_argument, 0, 'b' }, |
1f10f780 | 224 | { "rcvbuf", required_argument, 0, 'R' }, |
a9f0ad12 | 225 | #if HAVE_SYS_SOUNDCARD_H || EMPEG_HOST |
c593cf7c | 226 | { "oss", no_argument, 0, 'o' }, |
227 | #endif | |
146e86fb | 228 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 229 | { "alsa", no_argument, 0, 'a' }, |
230 | #endif | |
231 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
232 | { "core-audio", no_argument, 0, 'c' }, | |
233 | #endif | |
e9b635a3 | 234 | { "dump", required_argument, 0, 'r' }, |
a99c4e9a | 235 | { "socket", required_argument, 0, 's' }, |
a7e9570a | 236 | { "config", required_argument, 0, 'C' }, |
e83d0967 RK |
237 | { 0, 0, 0, 0 } |
238 | }; | |
239 | ||
a99c4e9a RK |
240 | /** @brief Control thread |
241 | * | |
242 | * This thread is responsible for accepting control commands from Disobedience | |
243 | * (or other controllers) over an AF_UNIX stream socket with a path specified | |
244 | * by the @c --socket option. The protocol uses simple string commands and | |
245 | * replies: | |
246 | * | |
247 | * - @c stop will shut the player down | |
248 | * - @c query will send back the reply @c running | |
249 | * - anything else is ignored | |
250 | * | |
251 | * Commands and response strings terminated by shutting down the connection or | |
252 | * by a newline. No attempt is made to multiplex multiple clients so it is | |
253 | * important that the command be sent as soon as the connection is made - it is | |
254 | * assumed that both parties to the protocol are entirely cooperating with one | |
255 | * another. | |
256 | */ | |
257 | static void *control_thread(void attribute((unused)) *arg) { | |
258 | struct sockaddr_un sa; | |
259 | int sfd, cfd; | |
260 | char *line; | |
261 | socklen_t salen; | |
262 | FILE *fp; | |
263 | ||
264 | assert(control_socket); | |
265 | unlink(control_socket); | |
266 | memset(&sa, 0, sizeof sa); | |
267 | sa.sun_family = AF_UNIX; | |
268 | strcpy(sa.sun_path, control_socket); | |
269 | sfd = xsocket(PF_UNIX, SOCK_STREAM, 0); | |
270 | if(bind(sfd, (const struct sockaddr *)&sa, sizeof sa) < 0) | |
271 | fatal(errno, "error binding to %s", control_socket); | |
272 | if(listen(sfd, 128) < 0) | |
273 | fatal(errno, "error calling listen on %s", control_socket); | |
274 | info("listening on %s", control_socket); | |
275 | for(;;) { | |
276 | salen = sizeof sa; | |
277 | cfd = accept(sfd, (struct sockaddr *)&sa, &salen); | |
278 | if(cfd < 0) { | |
279 | switch(errno) { | |
280 | case EINTR: | |
281 | case EAGAIN: | |
282 | break; | |
283 | default: | |
284 | fatal(errno, "error calling accept on %s", control_socket); | |
285 | } | |
286 | } | |
287 | if(!(fp = fdopen(cfd, "r+"))) { | |
288 | error(errno, "error calling fdopen for %s connection", control_socket); | |
289 | close(cfd); | |
290 | continue; | |
291 | } | |
292 | if(!inputline(control_socket, fp, &line, '\n')) { | |
293 | if(!strcmp(line, "stop")) { | |
294 | info("stopped via %s", control_socket); | |
295 | exit(0); /* terminate immediately */ | |
296 | } | |
297 | if(!strcmp(line, "query")) | |
298 | fprintf(fp, "running"); | |
299 | xfree(line); | |
300 | } | |
301 | if(fclose(fp) < 0) | |
302 | error(errno, "error closing %s connection", control_socket); | |
303 | } | |
304 | } | |
305 | ||
28bacdc0 RK |
306 | /** @brief Drop the first packet |
307 | * | |
308 | * Assumes that @ref lock is held. | |
309 | */ | |
310 | static void drop_first_packet(void) { | |
311 | if(pheap_count(&packets)) { | |
312 | struct packet *const p = pheap_remove(&packets); | |
313 | nsamples -= p->nsamples; | |
c593cf7c | 314 | playrtp_free_packet(p); |
2c7c9eae | 315 | pthread_cond_broadcast(&cond); |
2c7c9eae | 316 | } |
9086a105 RK |
317 | } |
318 | ||
189e9830 RK |
319 | /** @brief Background thread adding packets to heap |
320 | * | |
321 | * This just transfers packets from @ref received_packets to @ref packets. It | |
322 | * is important that it holds @ref receive_lock for as little time as possible, | |
323 | * in order to minimize the interval between calls to read() in | |
324 | * listen_thread(). | |
325 | */ | |
326 | static void *queue_thread(void attribute((unused)) *arg) { | |
327 | struct packet *p; | |
328 | ||
329 | for(;;) { | |
330 | /* Get the next packet */ | |
331 | pthread_mutex_lock(&receive_lock); | |
332 | while(!received_packets) | |
333 | pthread_cond_wait(&receive_cond, &receive_lock); | |
334 | p = received_packets; | |
335 | received_packets = p->next; | |
336 | if(!received_packets) | |
337 | received_tail = &received_packets; | |
338 | --nreceived; | |
339 | pthread_mutex_unlock(&receive_lock); | |
340 | /* Add it to the heap */ | |
341 | pthread_mutex_lock(&lock); | |
342 | pheap_insert(&packets, p); | |
343 | nsamples += p->nsamples; | |
344 | pthread_cond_broadcast(&cond); | |
345 | pthread_mutex_unlock(&lock); | |
346 | } | |
347 | } | |
348 | ||
09ee2f0d | 349 | /** @brief Background thread collecting samples |
0b75463f | 350 | * |
351 | * This function collects samples, perhaps converts them to the target format, | |
b0fdc63d | 352 | * and adds them to the packet list. |
353 | * | |
354 | * It is crucial that the gap between successive calls to read() is as small as | |
355 | * possible: otherwise packets will be dropped. | |
356 | * | |
357 | * We use a binary heap to ensure that the unavoidable effort is at worst | |
358 | * logarithmic in the total number of packets - in fact if packets are mostly | |
359 | * received in order then we will largely do constant work per packet since the | |
360 | * newest packet will always be last. | |
361 | * | |
362 | * Of more concern is that we must acquire the lock on the heap to add a packet | |
363 | * to it. If this proves a problem in practice then the answer would be | |
364 | * (probably doubly) linked list with new packets added the end and a second | |
365 | * thread which reads packets off the list and adds them to the heap. | |
366 | * | |
367 | * We keep memory allocation (mostly) very fast by keeping pre-allocated | |
c593cf7c | 368 | * packets around; see @ref playrtp_new_packet(). |
b0fdc63d | 369 | */ |
0b75463f | 370 | static void *listen_thread(void attribute((unused)) *arg) { |
2c7c9eae | 371 | struct packet *p = 0; |
0b75463f | 372 | int n; |
2c7c9eae RK |
373 | struct rtp_header header; |
374 | uint16_t seq; | |
375 | uint32_t timestamp; | |
376 | struct iovec iov[2]; | |
e83d0967 RK |
377 | |
378 | for(;;) { | |
189e9830 | 379 | if(!p) |
c593cf7c | 380 | p = playrtp_new_packet(); |
2c7c9eae RK |
381 | iov[0].iov_base = &header; |
382 | iov[0].iov_len = sizeof header; | |
383 | iov[1].iov_base = p->samples_raw; | |
b64efe7e | 384 | iov[1].iov_len = sizeof p->samples_raw / sizeof *p->samples_raw; |
2c7c9eae | 385 | n = readv(rtpfd, iov, 2); |
e83d0967 RK |
386 | if(n < 0) { |
387 | switch(errno) { | |
388 | case EINTR: | |
389 | continue; | |
390 | default: | |
391 | fatal(errno, "error reading from socket"); | |
392 | } | |
393 | } | |
0b75463f | 394 | /* Ignore too-short packets */ |
345ebe66 RK |
395 | if((size_t)n <= sizeof (struct rtp_header)) { |
396 | info("ignored a short packet"); | |
0b75463f | 397 | continue; |
345ebe66 | 398 | } |
2c7c9eae RK |
399 | timestamp = htonl(header.timestamp); |
400 | seq = htons(header.seq); | |
09ee2f0d | 401 | /* Ignore packets in the past */ |
2c7c9eae | 402 | if(active && lt(timestamp, next_timestamp)) { |
c0e41690 | 403 | info("dropping old packet, timestamp=%"PRIx32" < %"PRIx32, |
2c7c9eae | 404 | timestamp, next_timestamp); |
09ee2f0d | 405 | continue; |
c0e41690 | 406 | } |
189e9830 | 407 | p->next = 0; |
58b5a68f | 408 | p->flags = 0; |
2c7c9eae | 409 | p->timestamp = timestamp; |
e83d0967 | 410 | /* Convert to target format */ |
58b5a68f RK |
411 | if(header.mpt & 0x80) |
412 | p->flags |= IDLE; | |
2c7c9eae | 413 | switch(header.mpt & 0x7F) { |
e83d0967 | 414 | case 10: |
2c7c9eae | 415 | p->nsamples = (n - sizeof header) / sizeof(uint16_t); |
e83d0967 RK |
416 | break; |
417 | /* TODO support other RFC3551 media types (when the speaker does) */ | |
418 | default: | |
0b75463f | 419 | fatal(0, "unsupported RTP payload type %d", |
2c7c9eae | 420 | header.mpt & 0x7F); |
e83d0967 | 421 | } |
345ebe66 RK |
422 | if(logfp) |
423 | fprintf(logfp, "sequence %u timestamp %"PRIx32" length %"PRIx32" end %"PRIx32"\n", | |
2c7c9eae | 424 | seq, timestamp, p->nsamples, timestamp + p->nsamples); |
0b75463f | 425 | /* Stop reading if we've reached the maximum. |
426 | * | |
427 | * This is rather unsatisfactory: it means that if packets get heavily | |
428 | * out of order then we guarantee dropouts. But for now... */ | |
345ebe66 | 429 | if(nsamples >= maxbuffer) { |
189e9830 | 430 | pthread_mutex_lock(&lock); |
345ebe66 RK |
431 | while(nsamples >= maxbuffer) |
432 | pthread_cond_wait(&cond, &lock); | |
189e9830 | 433 | pthread_mutex_unlock(&lock); |
345ebe66 | 434 | } |
189e9830 RK |
435 | /* Add the packet to the receive queue */ |
436 | pthread_mutex_lock(&receive_lock); | |
437 | *received_tail = p; | |
438 | received_tail = &p->next; | |
439 | ++nreceived; | |
440 | pthread_cond_signal(&receive_cond); | |
441 | pthread_mutex_unlock(&receive_lock); | |
58b5a68f RK |
442 | /* We'll need a new packet */ |
443 | p = 0; | |
e83d0967 RK |
444 | } |
445 | } | |
446 | ||
5626f6d2 RK |
447 | /** @brief Wait until the buffer is adequately full |
448 | * | |
449 | * Must be called with @ref lock held. | |
450 | */ | |
c593cf7c | 451 | void playrtp_fill_buffer(void) { |
bfd27c14 RK |
452 | while(nsamples) |
453 | drop_first_packet(); | |
5626f6d2 RK |
454 | info("Buffering..."); |
455 | while(nsamples < readahead) | |
456 | pthread_cond_wait(&cond, &lock); | |
457 | next_timestamp = pheap_first(&packets)->timestamp; | |
458 | active = 1; | |
459 | } | |
460 | ||
461 | /** @brief Find next packet | |
462 | * @return Packet to play or NULL if none found | |
463 | * | |
464 | * The return packet is merely guaranteed not to be in the past: it might be | |
465 | * the first packet in the future rather than one that is actually suitable to | |
466 | * play. | |
467 | * | |
468 | * Must be called with @ref lock held. | |
469 | */ | |
c593cf7c | 470 | struct packet *playrtp_next_packet(void) { |
5626f6d2 RK |
471 | while(pheap_count(&packets)) { |
472 | struct packet *const p = pheap_first(&packets); | |
473 | if(le(p->timestamp + p->nsamples, next_timestamp)) { | |
474 | /* This packet is in the past. Drop it and try another one. */ | |
475 | drop_first_packet(); | |
476 | } else | |
477 | /* This packet is NOT in the past. (It might be in the future | |
478 | * however.) */ | |
479 | return p; | |
480 | } | |
481 | return 0; | |
482 | } | |
483 | ||
09ee2f0d | 484 | /** @brief Play an RTP stream |
485 | * | |
486 | * This is the guts of the program. It is responsible for: | |
487 | * - starting the listening thread | |
488 | * - opening the audio device | |
489 | * - reading ahead to build up a buffer | |
490 | * - arranging for audio to be played | |
491 | * - detecting when the buffer has got too small and re-buffering | |
492 | */ | |
0b75463f | 493 | static void play_rtp(void) { |
494 | pthread_t ltid; | |
a99c4e9a | 495 | int err; |
e83d0967 RK |
496 | |
497 | /* We receive and convert audio data in a background thread */ | |
a99c4e9a RK |
498 | if((err = pthread_create(<id, 0, listen_thread, 0))) |
499 | fatal(err, "pthread_create listen_thread"); | |
189e9830 | 500 | /* We have a second thread to add received packets to the queue */ |
a99c4e9a RK |
501 | if((err = pthread_create(<id, 0, queue_thread, 0))) |
502 | fatal(err, "pthread_create queue_thread"); | |
c593cf7c | 503 | /* The rest of the work is backend-specific */ |
504 | backend(); | |
e83d0967 RK |
505 | } |
506 | ||
507 | /* display usage message and terminate */ | |
508 | static void help(void) { | |
509 | xprintf("Usage:\n" | |
510 | " disorder-playrtp [OPTIONS] ADDRESS [PORT]\n" | |
511 | "Options:\n" | |
1153fd23 | 512 | " --device, -D DEVICE Output device\n" |
513 | " --min, -m FRAMES Buffer low water mark\n" | |
9086a105 RK |
514 | " --buffer, -b FRAMES Buffer high water mark\n" |
515 | " --max, -x FRAMES Buffer maximum size\n" | |
1f10f780 | 516 | " --rcvbuf, -R BYTES Socket receive buffer size\n" |
a7e9570a | 517 | " --config, -C PATH Set configuration file\n" |
146e86fb | 518 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 519 | " --alsa, -a Use ALSA to play audio\n" |
520 | #endif | |
a9f0ad12 | 521 | #if HAVE_SYS_SOUNDCARD_H || EMPEG_HOST |
c593cf7c | 522 | " --oss, -o Use OSS to play audio\n" |
523 | #endif | |
524 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
525 | " --core-audio, -c Use Core Audio to play audio\n" | |
526 | #endif | |
9086a105 RK |
527 | " --help, -h Display usage message\n" |
528 | " --version, -V Display version number\n" | |
529 | ); | |
e83d0967 RK |
530 | xfclose(stdout); |
531 | exit(0); | |
532 | } | |
533 | ||
534 | /* display version number and terminate */ | |
535 | static void version(void) { | |
a05e4467 | 536 | xprintf("%s", disorder_version_string); |
e83d0967 RK |
537 | xfclose(stdout); |
538 | exit(0); | |
539 | } | |
540 | ||
541 | int main(int argc, char **argv) { | |
a99c4e9a | 542 | int n, err; |
e83d0967 RK |
543 | struct addrinfo *res; |
544 | struct stringlist sl; | |
0b75463f | 545 | char *sockname; |
1f10f780 RK |
546 | int rcvbuf, target_rcvbuf = 131072; |
547 | socklen_t len; | |
23205f9c RK |
548 | struct ip_mreq mreq; |
549 | struct ipv6_mreq mreq6; | |
a7e9570a RK |
550 | disorder_client *c; |
551 | char *address, *port; | |
6fba990c RK |
552 | int is_multicast; |
553 | union any_sockaddr { | |
554 | struct sockaddr sa; | |
555 | struct sockaddr_in in; | |
556 | struct sockaddr_in6 in6; | |
557 | }; | |
558 | union any_sockaddr mgroup; | |
e9b635a3 | 559 | const char *dumpfile = 0; |
e83d0967 | 560 | |
0b75463f | 561 | static const struct addrinfo prefs = { |
e83d0967 RK |
562 | AI_PASSIVE, |
563 | PF_INET, | |
564 | SOCK_DGRAM, | |
565 | IPPROTO_UDP, | |
566 | 0, | |
567 | 0, | |
568 | 0, | |
569 | 0 | |
570 | }; | |
571 | ||
572 | mem_init(); | |
573 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); | |
e9b635a3 | 574 | while((n = getopt_long(argc, argv, "hVdD:m:b:x:L:R:M:aocC:r", options, 0)) >= 0) { |
e83d0967 RK |
575 | switch(n) { |
576 | case 'h': help(); | |
577 | case 'V': version(); | |
578 | case 'd': debugging = 1; break; | |
0b75463f | 579 | case 'D': device = optarg; break; |
1153fd23 | 580 | case 'm': minbuffer = 2 * atol(optarg); break; |
581 | case 'b': readahead = 2 * atol(optarg); break; | |
9086a105 | 582 | case 'x': maxbuffer = 2 * atol(optarg); break; |
345ebe66 | 583 | case 'L': logfp = fopen(optarg, "w"); break; |
1f10f780 | 584 | case 'R': target_rcvbuf = atoi(optarg); break; |
146e86fb | 585 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 586 | case 'a': backend = playrtp_alsa; break; |
587 | #endif | |
a9f0ad12 | 588 | #if HAVE_SYS_SOUNDCARD_H || EMPEG_HOST |
c593cf7c | 589 | case 'o': backend = playrtp_oss; break; |
590 | #endif | |
591 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
592 | case 'c': backend = playrtp_coreaudio; break; | |
c593cf7c | 593 | #endif |
a7e9570a | 594 | case 'C': configfile = optarg; break; |
a99c4e9a | 595 | case 's': control_socket = optarg; break; |
e9b635a3 | 596 | case 'r': dumpfile = optarg; break; |
e83d0967 RK |
597 | default: fatal(0, "invalid option"); |
598 | } | |
599 | } | |
a7e9570a | 600 | if(config_read(0)) fatal(0, "cannot read configuration"); |
9086a105 RK |
601 | if(!maxbuffer) |
602 | maxbuffer = 4 * readahead; | |
e83d0967 RK |
603 | argc -= optind; |
604 | argv += optind; | |
a7e9570a RK |
605 | switch(argc) { |
606 | case 0: | |
6fba990c | 607 | /* Get configuration from server */ |
a7e9570a RK |
608 | if(!(c = disorder_new(1))) exit(EXIT_FAILURE); |
609 | if(disorder_connect(c)) exit(EXIT_FAILURE); | |
610 | if(disorder_rtp_address(c, &address, &port)) exit(EXIT_FAILURE); | |
6fba990c RK |
611 | sl.n = 2; |
612 | sl.s = xcalloc(2, sizeof *sl.s); | |
613 | sl.s[0] = address; | |
614 | sl.s[1] = port; | |
a7e9570a | 615 | break; |
6fba990c | 616 | case 1: |
a7e9570a | 617 | case 2: |
6fba990c | 618 | /* Use command-line ADDRESS+PORT or just PORT */ |
a7e9570a RK |
619 | sl.n = argc; |
620 | sl.s = argv; | |
621 | break; | |
622 | default: | |
6fba990c | 623 | fatal(0, "usage: disorder-playrtp [OPTIONS] [[ADDRESS] PORT]"); |
a7e9570a | 624 | } |
6fba990c | 625 | /* Look up address and port */ |
0b75463f | 626 | if(!(res = get_address(&sl, &prefs, &sockname))) |
e83d0967 | 627 | exit(1); |
6fba990c | 628 | /* Create the socket */ |
e83d0967 RK |
629 | if((rtpfd = socket(res->ai_family, |
630 | res->ai_socktype, | |
631 | res->ai_protocol)) < 0) | |
632 | fatal(errno, "error creating socket"); | |
6fba990c RK |
633 | /* Stash the multicast group address */ |
634 | if((is_multicast = multicast(res->ai_addr))) { | |
635 | memcpy(&mgroup, res->ai_addr, res->ai_addrlen); | |
636 | switch(res->ai_addr->sa_family) { | |
637 | case AF_INET: | |
638 | mgroup.in.sin_port = 0; | |
639 | break; | |
640 | case AF_INET6: | |
641 | mgroup.in6.sin6_port = 0; | |
642 | break; | |
643 | } | |
644 | } | |
645 | /* Bind to 0/port */ | |
646 | switch(res->ai_addr->sa_family) { | |
647 | case AF_INET: | |
648 | memset(&((struct sockaddr_in *)res->ai_addr)->sin_addr, 0, | |
649 | sizeof (struct in_addr)); | |
650 | break; | |
651 | case AF_INET6: | |
652 | memset(&((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 0, | |
653 | sizeof (struct in6_addr)); | |
654 | break; | |
655 | default: | |
656 | fatal(0, "unsupported family %d", (int)res->ai_addr->sa_family); | |
657 | } | |
e83d0967 RK |
658 | if(bind(rtpfd, res->ai_addr, res->ai_addrlen) < 0) |
659 | fatal(errno, "error binding socket to %s", sockname); | |
6fba990c RK |
660 | if(is_multicast) { |
661 | switch(mgroup.sa.sa_family) { | |
23205f9c | 662 | case PF_INET: |
6fba990c | 663 | mreq.imr_multiaddr = mgroup.in.sin_addr; |
23205f9c RK |
664 | mreq.imr_interface.s_addr = 0; /* use primary interface */ |
665 | if(setsockopt(rtpfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, | |
666 | &mreq, sizeof mreq) < 0) | |
667 | fatal(errno, "error calling setsockopt IP_ADD_MEMBERSHIP"); | |
668 | break; | |
669 | case PF_INET6: | |
6fba990c | 670 | mreq6.ipv6mr_multiaddr = mgroup.in6.sin6_addr; |
23205f9c RK |
671 | memset(&mreq6.ipv6mr_interface, 0, sizeof mreq6.ipv6mr_interface); |
672 | if(setsockopt(rtpfd, IPPROTO_IPV6, IPV6_JOIN_GROUP, | |
673 | &mreq6, sizeof mreq6) < 0) | |
674 | fatal(errno, "error calling setsockopt IPV6_JOIN_GROUP"); | |
675 | break; | |
676 | default: | |
677 | fatal(0, "unsupported address family %d", res->ai_family); | |
678 | } | |
6fba990c RK |
679 | info("listening on %s multicast group %s", |
680 | format_sockaddr(res->ai_addr), format_sockaddr(&mgroup.sa)); | |
681 | } else | |
682 | info("listening on %s", format_sockaddr(res->ai_addr)); | |
1f10f780 RK |
683 | len = sizeof rcvbuf; |
684 | if(getsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &len) < 0) | |
685 | fatal(errno, "error calling getsockopt SO_RCVBUF"); | |
f0bae611 | 686 | if(target_rcvbuf > rcvbuf) { |
1f10f780 RK |
687 | if(setsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, |
688 | &target_rcvbuf, sizeof target_rcvbuf) < 0) | |
689 | error(errno, "error calling setsockopt SO_RCVBUF %d", | |
690 | target_rcvbuf); | |
691 | /* We try to carry on anyway */ | |
692 | else | |
693 | info("changed socket receive buffer from %d to %d", | |
694 | rcvbuf, target_rcvbuf); | |
695 | } else | |
696 | info("default socket receive buffer %d", rcvbuf); | |
697 | if(logfp) | |
698 | info("WARNING: -L option can impact performance"); | |
a99c4e9a RK |
699 | if(control_socket) { |
700 | pthread_t tid; | |
701 | ||
702 | if((err = pthread_create(&tid, 0, control_thread, 0))) | |
703 | fatal(err, "pthread_create control_thread"); | |
704 | } | |
e9b635a3 RK |
705 | if(dumpfile) { |
706 | int fd; | |
707 | unsigned char buffer[65536]; | |
708 | size_t written; | |
709 | ||
710 | if((fd = open(dumpfile, O_RDWR|O_TRUNC|O_CREAT, 0666)) < 0) | |
711 | fatal(errno, "opening %s", dumpfile); | |
712 | /* Fill with 0s to a suitable size */ | |
713 | memset(buffer, 0, sizeof buffer); | |
714 | for(written = 0; written < dump_size * sizeof(int16_t); | |
715 | written += sizeof buffer) { | |
716 | if(write(fd, buffer, sizeof buffer) < 0) | |
717 | fatal(errno, "clearing %s", dumpfile); | |
718 | } | |
719 | /* Map the buffer into memory for convenience */ | |
720 | dump_buffer = mmap(0, dump_size * sizeof(int16_t), PROT_READ|PROT_WRITE, | |
721 | MAP_SHARED, fd, 0); | |
722 | if(dump_buffer == (void *)-1) | |
723 | fatal(errno, "mapping %s", dumpfile); | |
724 | info("dumping to %s", dumpfile); | |
725 | } | |
e83d0967 RK |
726 | play_rtp(); |
727 | return 0; | |
728 | } | |
729 | ||
730 | /* | |
731 | Local Variables: | |
732 | c-basic-offset:2 | |
733 | comment-column:40 | |
734 | fill-column:79 | |
735 | indent-tabs-mode:nil | |
736 | End: | |
737 | */ |