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