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e83d0967 RK |
1 | /* |
2 | * This file is part of DisOrder. | |
06385470 | 3 | * Copyright (C) 2007-2009, 2011, 2013 Richard Kettlewell |
e83d0967 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
e83d0967 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
e83d0967 RK |
8 | * (at your option) any later version. |
9 | * | |
e7eb3a27 RK |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
e83d0967 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
e83d0967 | 17 | */ |
28bacdc0 RK |
18 | /** @file clients/playrtp.c |
19 | * @brief RTP player | |
20 | * | |
b0fdc63d | 21 | * This player supports Linux (<a href="http://www.alsa-project.org/">ALSA</a>) |
22 | * and Apple Mac (<a | |
23 | * href="http://developer.apple.com/audio/coreaudio.html">Core Audio</a>) | |
24 | * systems. There is no support for Microsoft Windows yet, and that will in | |
25 | * fact probably an entirely separate program. | |
26 | * | |
8d251217 RK |
27 | * The program runs (at least) three threads: |
28 | * | |
29 | * listen_thread() is responsible for reading RTP packets off the wire and | |
30 | * adding them to the linked list @ref received_packets, assuming they are | |
31 | * basically sound. | |
32 | * | |
33 | * queue_thread() takes packets off this linked list and adds them to @ref | |
34 | * packets (an operation which might be much slower due to contention for @ref | |
35 | * lock). | |
36 | * | |
37 | * control_thread() accepts commands from Disobedience (or anything else). | |
38 | * | |
39 | * The main thread activates and deactivates audio playing via the @ref | |
40 | * lib/uaudio.h API (which probably implies at least one further thread). | |
b0fdc63d | 41 | * |
42 | * Sometimes it happens that there is no audio available to play. This may | |
43 | * because the server went away, or a packet was dropped, or the server | |
44 | * deliberately did not send any sound because it encountered a silence. | |
189e9830 RK |
45 | * |
46 | * Assumptions: | |
47 | * - it is safe to read uint32_t values without a lock protecting them | |
28bacdc0 | 48 | */ |
e83d0967 | 49 | |
05b75f8d | 50 | #include "common.h" |
e83d0967 RK |
51 | |
52 | #include <getopt.h> | |
e83d0967 RK |
53 | #include <sys/socket.h> |
54 | #include <sys/types.h> | |
55 | #include <sys/socket.h> | |
56 | #include <netdb.h> | |
57 | #include <pthread.h> | |
0b75463f | 58 | #include <locale.h> |
2c7c9eae | 59 | #include <sys/uio.h> |
c593cf7c | 60 | #include <errno.h> |
e3426f7b | 61 | #include <netinet/in.h> |
2d2effe2 | 62 | #include <sys/time.h> |
a99c4e9a | 63 | #include <sys/un.h> |
9fbe0996 | 64 | #include <unistd.h> |
e9b635a3 RK |
65 | #include <sys/mman.h> |
66 | #include <fcntl.h> | |
b0619501 | 67 | #include <math.h> |
cca034e5 RK |
68 | #include <arpa/inet.h> |
69 | #include <ifaddrs.h> | |
70 | #include <net/if.h> | |
e83d0967 RK |
71 | |
72 | #include "log.h" | |
73 | #include "mem.h" | |
74 | #include "configuration.h" | |
75 | #include "addr.h" | |
76 | #include "syscalls.h" | |
14b5913c | 77 | #include "printf.h" |
e83d0967 | 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" |
3fbdc96d | 86 | #include "version.h" |
7a2c7068 | 87 | #include "uaudio.h" |
e83d0967 | 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 */ |
0b75463f | 101 | |
ad535598 | 102 | /** @brief Buffer low watermark in samples */ |
14b5913c | 103 | unsigned minbuffer; |
0b75463f | 104 | |
ad535598 | 105 | /** @brief Maximum buffer size in samples |
9086a105 | 106 | * |
ad535598 RK |
107 | * We'll stop reading from the network if we have this many samples. |
108 | */ | |
9086a105 RK |
109 | static unsigned maxbuffer; |
110 | ||
189e9830 RK |
111 | /** @brief Received packets |
112 | * Protected by @ref receive_lock | |
113 | * | |
114 | * Received packets are added to this list, and queue_thread() picks them off | |
115 | * it and adds them to @ref packets. Whenever a packet is added to it, @ref | |
116 | * receive_cond is signalled. | |
117 | */ | |
8e3fe3d8 | 118 | struct packet *received_packets; |
189e9830 RK |
119 | |
120 | /** @brief Tail of @ref received_packets | |
121 | * Protected by @ref receive_lock | |
122 | */ | |
8e3fe3d8 | 123 | struct packet **received_tail = &received_packets; |
189e9830 RK |
124 | |
125 | /** @brief Lock protecting @ref received_packets | |
126 | * | |
127 | * Only listen_thread() and queue_thread() ever hold this lock. It is vital | |
128 | * that queue_thread() not hold it any longer than it strictly has to. */ | |
8e3fe3d8 | 129 | pthread_mutex_t receive_lock = PTHREAD_MUTEX_INITIALIZER; |
189e9830 RK |
130 | |
131 | /** @brief Condition variable signalled when @ref received_packets is updated | |
132 | * | |
133 | * Used by listen_thread() to notify queue_thread() that it has added another | |
134 | * packet to @ref received_packets. */ | |
8e3fe3d8 | 135 | pthread_cond_t receive_cond = PTHREAD_COND_INITIALIZER; |
189e9830 RK |
136 | |
137 | /** @brief Length of @ref received_packets */ | |
8e3fe3d8 | 138 | uint32_t nreceived; |
28bacdc0 RK |
139 | |
140 | /** @brief Binary heap of received packets */ | |
8e3fe3d8 | 141 | struct pheap packets; |
28bacdc0 | 142 | |
189e9830 RK |
143 | /** @brief Total number of samples available |
144 | * | |
145 | * We make this volatile because we inspect it without a protecting lock, | |
146 | * so the usual pthread_* guarantees aren't available. | |
147 | */ | |
8e3fe3d8 | 148 | volatile uint32_t nsamples; |
0b75463f | 149 | |
150 | /** @brief Timestamp of next packet to play. | |
151 | * | |
152 | * This is set to the timestamp of the last packet, plus the number of | |
09ee2f0d | 153 | * samples it contained. Only valid if @ref active is nonzero. |
0b75463f | 154 | */ |
8e3fe3d8 | 155 | uint32_t next_timestamp; |
e83d0967 | 156 | |
09ee2f0d | 157 | /** @brief True if actively playing |
158 | * | |
159 | * This is true when playing and false when just buffering. */ | |
8e3fe3d8 | 160 | int active; |
09ee2f0d | 161 | |
189e9830 | 162 | /** @brief Lock protecting @ref packets */ |
8e3fe3d8 | 163 | pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; |
189e9830 RK |
164 | |
165 | /** @brief Condition variable signalled whenever @ref packets is changed */ | |
8e3fe3d8 | 166 | pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
2c7c9eae | 167 | |
c593cf7c | 168 | /** @brief Backend to play with */ |
7a2c7068 | 169 | static const struct uaudio *backend; |
c593cf7c | 170 | |
8e3fe3d8 | 171 | HEAP_DEFINE(pheap, struct packet *, lt_packet); |
e83d0967 | 172 | |
a99c4e9a RK |
173 | /** @brief Control socket or NULL */ |
174 | const char *control_socket; | |
175 | ||
b28bddbb RK |
176 | /** @brief Buffer for debugging dump |
177 | * | |
178 | * The debug dump is enabled by the @c --dump option. It records the last 20s | |
179 | * of audio to the specified file (which will be about 3.5Mbytes). The file is | |
180 | * written as as ring buffer, so the start point will progress through it. | |
181 | * | |
182 | * Use clients/dump2wav to convert this to a WAV file, which can then be loaded | |
183 | * into (e.g.) Audacity for further inspection. | |
184 | * | |
185 | * All three backends (ALSA, OSS, Core Audio) now support this option. | |
186 | * | |
187 | * The idea is to allow the user a few seconds to react to an audible artefact. | |
188 | */ | |
e9b635a3 | 189 | int16_t *dump_buffer; |
b28bddbb RK |
190 | |
191 | /** @brief Current index within debugging dump */ | |
e9b635a3 | 192 | size_t dump_index; |
b28bddbb RK |
193 | |
194 | /** @brief Size of debugging dump in samples */ | |
195 | size_t dump_size = 44100/*Hz*/ * 2/*channels*/ * 20/*seconds*/; | |
e9b635a3 | 196 | |
e83d0967 RK |
197 | static const struct option options[] = { |
198 | { "help", no_argument, 0, 'h' }, | |
199 | { "version", no_argument, 0, 'V' }, | |
200 | { "debug", no_argument, 0, 'd' }, | |
0b75463f | 201 | { "device", required_argument, 0, 'D' }, |
1153fd23 | 202 | { "min", required_argument, 0, 'm' }, |
9086a105 | 203 | { "max", required_argument, 0, 'x' }, |
1f10f780 | 204 | { "rcvbuf", required_argument, 0, 'R' }, |
a9f0ad12 | 205 | #if HAVE_SYS_SOUNDCARD_H || EMPEG_HOST |
c593cf7c | 206 | { "oss", no_argument, 0, 'o' }, |
207 | #endif | |
146e86fb | 208 | #if HAVE_ALSA_ASOUNDLIB_H |
c593cf7c | 209 | { "alsa", no_argument, 0, 'a' }, |
210 | #endif | |
211 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
212 | { "core-audio", no_argument, 0, 'c' }, | |
213 | #endif | |
ba32e50c | 214 | { "api", required_argument, 0, 'A' }, |
e9b635a3 | 215 | { "dump", required_argument, 0, 'r' }, |
e979b844 | 216 | { "command", required_argument, 0, 'e' }, |
287ad384 | 217 | { "pause-mode", required_argument, 0, 'P' }, |
a99c4e9a | 218 | { "socket", required_argument, 0, 's' }, |
a7e9570a | 219 | { "config", required_argument, 0, 'C' }, |
b0619501 | 220 | { "monitor", no_argument, 0, 'M' }, |
e83d0967 RK |
221 | { 0, 0, 0, 0 } |
222 | }; | |
223 | ||
a99c4e9a RK |
224 | /** @brief Control thread |
225 | * | |
226 | * This thread is responsible for accepting control commands from Disobedience | |
227 | * (or other controllers) over an AF_UNIX stream socket with a path specified | |
228 | * by the @c --socket option. The protocol uses simple string commands and | |
229 | * replies: | |
230 | * | |
231 | * - @c stop will shut the player down | |
232 | * - @c query will send back the reply @c running | |
233 | * - anything else is ignored | |
234 | * | |
235 | * Commands and response strings terminated by shutting down the connection or | |
236 | * by a newline. No attempt is made to multiplex multiple clients so it is | |
237 | * important that the command be sent as soon as the connection is made - it is | |
238 | * assumed that both parties to the protocol are entirely cooperating with one | |
239 | * another. | |
240 | */ | |
241 | static void *control_thread(void attribute((unused)) *arg) { | |
242 | struct sockaddr_un sa; | |
243 | int sfd, cfd; | |
244 | char *line; | |
245 | socklen_t salen; | |
246 | FILE *fp; | |
af21fb6b | 247 | int vl, vr; |
a99c4e9a RK |
248 | |
249 | assert(control_socket); | |
250 | unlink(control_socket); | |
251 | memset(&sa, 0, sizeof sa); | |
252 | sa.sun_family = AF_UNIX; | |
253 | strcpy(sa.sun_path, control_socket); | |
254 | sfd = xsocket(PF_UNIX, SOCK_STREAM, 0); | |
255 | if(bind(sfd, (const struct sockaddr *)&sa, sizeof sa) < 0) | |
2e9ba080 | 256 | disorder_fatal(errno, "error binding to %s", control_socket); |
a99c4e9a | 257 | if(listen(sfd, 128) < 0) |
2e9ba080 RK |
258 | disorder_fatal(errno, "error calling listen on %s", control_socket); |
259 | disorder_info("listening on %s", control_socket); | |
a99c4e9a RK |
260 | for(;;) { |
261 | salen = sizeof sa; | |
262 | cfd = accept(sfd, (struct sockaddr *)&sa, &salen); | |
263 | if(cfd < 0) { | |
264 | switch(errno) { | |
265 | case EINTR: | |
266 | case EAGAIN: | |
267 | break; | |
268 | default: | |
2e9ba080 | 269 | disorder_fatal(errno, "error calling accept on %s", control_socket); |
a99c4e9a RK |
270 | } |
271 | } | |
272 | if(!(fp = fdopen(cfd, "r+"))) { | |
2e9ba080 | 273 | disorder_error(errno, "error calling fdopen for %s connection", control_socket); |
a99c4e9a RK |
274 | close(cfd); |
275 | continue; | |
276 | } | |
277 | if(!inputline(control_socket, fp, &line, '\n')) { | |
278 | if(!strcmp(line, "stop")) { | |
2e9ba080 | 279 | disorder_info("stopped via %s", control_socket); |
a99c4e9a | 280 | exit(0); /* terminate immediately */ |
af21fb6b | 281 | } else if(!strcmp(line, "query")) |
a99c4e9a | 282 | fprintf(fp, "running"); |
af21fb6b MW |
283 | else if(!strcmp(line, "getvol")) { |
284 | if(backend->get_volume) backend->get_volume(&vl, &vr); | |
285 | else vl = vr = 0; | |
286 | fprintf(fp, "%d %d\n", vl, vr); | |
287 | } else if(!strncmp(line, "setvol ", 7)) { | |
288 | if(!backend->set_volume) | |
289 | vl = vr = 0; | |
290 | else if(sscanf(line + 7, "%d %d", &vl, &vr) == 2) | |
291 | backend->set_volume(&vl, &vr); | |
292 | else | |
293 | backend->get_volume(&vl, &vr); | |
294 | fprintf(fp, "%d %d\n", vl, vr); | |
295 | } | |
a99c4e9a RK |
296 | xfree(line); |
297 | } | |
298 | if(fclose(fp) < 0) | |
2e9ba080 | 299 | disorder_error(errno, "error closing %s connection", control_socket); |
a99c4e9a RK |
300 | } |
301 | } | |
302 | ||
28bacdc0 RK |
303 | /** @brief Drop the first packet |
304 | * | |
305 | * Assumes that @ref lock is held. | |
306 | */ | |
307 | static void drop_first_packet(void) { | |
308 | if(pheap_count(&packets)) { | |
309 | struct packet *const p = pheap_remove(&packets); | |
310 | nsamples -= p->nsamples; | |
c593cf7c | 311 | playrtp_free_packet(p); |
2c7c9eae | 312 | pthread_cond_broadcast(&cond); |
2c7c9eae | 313 | } |
9086a105 RK |
314 | } |
315 | ||
189e9830 RK |
316 | /** @brief Background thread adding packets to heap |
317 | * | |
318 | * This just transfers packets from @ref received_packets to @ref packets. It | |
319 | * is important that it holds @ref receive_lock for as little time as possible, | |
320 | * in order to minimize the interval between calls to read() in | |
321 | * listen_thread(). | |
322 | */ | |
323 | static void *queue_thread(void attribute((unused)) *arg) { | |
324 | struct packet *p; | |
325 | ||
326 | for(;;) { | |
327 | /* Get the next packet */ | |
328 | pthread_mutex_lock(&receive_lock); | |
4dadf1a2 | 329 | while(!received_packets) { |
189e9830 | 330 | pthread_cond_wait(&receive_cond, &receive_lock); |
4dadf1a2 | 331 | } |
189e9830 RK |
332 | p = received_packets; |
333 | received_packets = p->next; | |
334 | if(!received_packets) | |
335 | received_tail = &received_packets; | |
336 | --nreceived; | |
337 | pthread_mutex_unlock(&receive_lock); | |
338 | /* Add it to the heap */ | |
339 | pthread_mutex_lock(&lock); | |
340 | pheap_insert(&packets, p); | |
341 | nsamples += p->nsamples; | |
342 | pthread_cond_broadcast(&cond); | |
343 | pthread_mutex_unlock(&lock); | |
344 | } | |
c6a70f38 RK |
345 | #if HAVE_STUPID_GCC44 |
346 | return NULL; | |
347 | #endif | |
189e9830 RK |
348 | } |
349 | ||
09ee2f0d | 350 | /** @brief Background thread collecting samples |
0b75463f | 351 | * |
352 | * This function collects samples, perhaps converts them to the target format, | |
b0fdc63d | 353 | * and adds them to the packet list. |
354 | * | |
355 | * It is crucial that the gap between successive calls to read() is as small as | |
356 | * possible: otherwise packets will be dropped. | |
357 | * | |
358 | * We use a binary heap to ensure that the unavoidable effort is at worst | |
359 | * logarithmic in the total number of packets - in fact if packets are mostly | |
360 | * received in order then we will largely do constant work per packet since the | |
361 | * newest packet will always be last. | |
362 | * | |
363 | * Of more concern is that we must acquire the lock on the heap to add a packet | |
364 | * to it. If this proves a problem in practice then the answer would be | |
365 | * (probably doubly) linked list with new packets added the end and a second | |
366 | * thread which reads packets off the list and adds them to the heap. | |
367 | * | |
368 | * We keep memory allocation (mostly) very fast by keeping pre-allocated | |
c593cf7c | 369 | * packets around; see @ref playrtp_new_packet(). |
b0fdc63d | 370 | */ |
0b75463f | 371 | static void *listen_thread(void attribute((unused)) *arg) { |
2c7c9eae | 372 | struct packet *p = 0; |
0b75463f | 373 | int n; |
2c7c9eae RK |
374 | struct rtp_header header; |
375 | uint16_t seq; | |
376 | uint32_t timestamp; | |
377 | struct iovec iov[2]; | |
e83d0967 RK |
378 | |
379 | for(;;) { | |
189e9830 | 380 | if(!p) |
c593cf7c | 381 | p = playrtp_new_packet(); |
2c7c9eae RK |
382 | iov[0].iov_base = &header; |
383 | iov[0].iov_len = sizeof header; | |
384 | iov[1].iov_base = p->samples_raw; | |
b64efe7e | 385 | iov[1].iov_len = sizeof p->samples_raw / sizeof *p->samples_raw; |
2c7c9eae | 386 | n = readv(rtpfd, iov, 2); |
e83d0967 RK |
387 | if(n < 0) { |
388 | switch(errno) { | |
389 | case EINTR: | |
390 | continue; | |
391 | default: | |
2e9ba080 | 392 | disorder_fatal(errno, "error reading from socket"); |
e83d0967 RK |
393 | } |
394 | } | |
0b75463f | 395 | /* Ignore too-short packets */ |
345ebe66 | 396 | if((size_t)n <= sizeof (struct rtp_header)) { |
2e9ba080 | 397 | disorder_info("ignored a short packet"); |
0b75463f | 398 | continue; |
345ebe66 | 399 | } |
2c7c9eae RK |
400 | timestamp = htonl(header.timestamp); |
401 | seq = htons(header.seq); | |
09ee2f0d | 402 | /* Ignore packets in the past */ |
2c7c9eae | 403 | if(active && lt(timestamp, next_timestamp)) { |
2e9ba080 | 404 | disorder_info("dropping old packet, timestamp=%"PRIx32" < %"PRIx32, |
2c7c9eae | 405 | timestamp, next_timestamp); |
09ee2f0d | 406 | continue; |
c0e41690 | 407 | } |
28f1495a RK |
408 | /* Ignore packets with the extension bit set. */ |
409 | if(header.vpxcc & 0x10) | |
410 | continue; | |
189e9830 | 411 | p->next = 0; |
58b5a68f | 412 | p->flags = 0; |
2c7c9eae | 413 | p->timestamp = timestamp; |
e83d0967 | 414 | /* Convert to target format */ |
58b5a68f RK |
415 | if(header.mpt & 0x80) |
416 | p->flags |= IDLE; | |
2c7c9eae | 417 | switch(header.mpt & 0x7F) { |
4fd38868 | 418 | case 10: /* L16 */ |
2c7c9eae | 419 | p->nsamples = (n - sizeof header) / sizeof(uint16_t); |
e83d0967 RK |
420 | break; |
421 | /* TODO support other RFC3551 media types (when the speaker does) */ | |
422 | default: | |
2e9ba080 | 423 | disorder_fatal(0, "unsupported RTP payload type %d", header.mpt & 0x7F); |
e83d0967 | 424 | } |
67d308e7 RK |
425 | /* See if packet is silent */ |
426 | const uint16_t *s = p->samples_raw; | |
7bdf42d0 | 427 | n = p->nsamples; |
67d308e7 RK |
428 | for(; n > 0; --n) |
429 | if(*s++) | |
430 | break; | |
431 | if(!n) | |
432 | p->flags |= SILENT; | |
345ebe66 RK |
433 | if(logfp) |
434 | fprintf(logfp, "sequence %u timestamp %"PRIx32" length %"PRIx32" end %"PRIx32"\n", | |
2c7c9eae | 435 | seq, timestamp, p->nsamples, timestamp + p->nsamples); |
0b75463f | 436 | /* Stop reading if we've reached the maximum. |
437 | * | |
438 | * This is rather unsatisfactory: it means that if packets get heavily | |
439 | * out of order then we guarantee dropouts. But for now... */ | |
345ebe66 | 440 | if(nsamples >= maxbuffer) { |
189e9830 | 441 | pthread_mutex_lock(&lock); |
4dadf1a2 | 442 | while(nsamples >= maxbuffer) { |
345ebe66 | 443 | pthread_cond_wait(&cond, &lock); |
4dadf1a2 | 444 | } |
189e9830 | 445 | pthread_mutex_unlock(&lock); |
345ebe66 | 446 | } |
189e9830 RK |
447 | /* Add the packet to the receive queue */ |
448 | pthread_mutex_lock(&receive_lock); | |
449 | *received_tail = p; | |
450 | received_tail = &p->next; | |
451 | ++nreceived; | |
452 | pthread_cond_signal(&receive_cond); | |
453 | pthread_mutex_unlock(&receive_lock); | |
58b5a68f RK |
454 | /* We'll need a new packet */ |
455 | p = 0; | |
e83d0967 RK |
456 | } |
457 | } | |
458 | ||
5626f6d2 RK |
459 | /** @brief Wait until the buffer is adequately full |
460 | * | |
461 | * Must be called with @ref lock held. | |
462 | */ | |
c593cf7c | 463 | void playrtp_fill_buffer(void) { |
0e72bf84 | 464 | /* Discard current buffer contents */ |
ad535598 RK |
465 | while(nsamples) { |
466 | //fprintf(stderr, "%8u/%u (%u) DROPPING\n", nsamples, maxbuffer, minbuffer); | |
bfd27c14 | 467 | drop_first_packet(); |
ad535598 | 468 | } |
2e9ba080 | 469 | disorder_info("Buffering..."); |
0e72bf84 RK |
470 | /* Wait until there's at least minbuffer samples available */ |
471 | while(nsamples < minbuffer) { | |
ad535598 | 472 | //fprintf(stderr, "%8u/%u (%u) FILLING\n", nsamples, maxbuffer, minbuffer); |
5626f6d2 | 473 | pthread_cond_wait(&cond, &lock); |
4dadf1a2 | 474 | } |
0e72bf84 | 475 | /* Start from whatever is earliest */ |
5626f6d2 RK |
476 | next_timestamp = pheap_first(&packets)->timestamp; |
477 | active = 1; | |
478 | } | |
479 | ||
480 | /** @brief Find next packet | |
481 | * @return Packet to play or NULL if none found | |
482 | * | |
483 | * The return packet is merely guaranteed not to be in the past: it might be | |
484 | * the first packet in the future rather than one that is actually suitable to | |
485 | * play. | |
486 | * | |
487 | * Must be called with @ref lock held. | |
488 | */ | |
c593cf7c | 489 | struct packet *playrtp_next_packet(void) { |
5626f6d2 RK |
490 | while(pheap_count(&packets)) { |
491 | struct packet *const p = pheap_first(&packets); | |
492 | if(le(p->timestamp + p->nsamples, next_timestamp)) { | |
493 | /* This packet is in the past. Drop it and try another one. */ | |
494 | drop_first_packet(); | |
495 | } else | |
496 | /* This packet is NOT in the past. (It might be in the future | |
497 | * however.) */ | |
498 | return p; | |
499 | } | |
500 | return 0; | |
501 | } | |
502 | ||
e83d0967 | 503 | /* display usage message and terminate */ |
16bf32dc | 504 | static void attribute((noreturn)) help(void) { |
e83d0967 | 505 | xprintf("Usage:\n" |
c897bb65 | 506 | " disorder-playrtp [OPTIONS] [[ADDRESS] PORT]\n" |
e83d0967 | 507 | "Options:\n" |
1153fd23 | 508 | " --device, -D DEVICE Output device\n" |
509 | " --min, -m FRAMES Buffer low water mark\n" | |
9086a105 | 510 | " --max, -x FRAMES Buffer maximum size\n" |
1f10f780 | 511 | " --rcvbuf, -R BYTES Socket receive buffer size\n" |
a7e9570a | 512 | " --config, -C PATH Set configuration file\n" |
ba32e50c RK |
513 | " --api, -A API Select audio API. Possibilities:\n" |
514 | " "); | |
515 | int first = 1; | |
516 | for(int n = 0; uaudio_apis[n]; ++n) { | |
517 | if(uaudio_apis[n]->flags & UAUDIO_API_CLIENT) { | |
518 | if(first) | |
519 | first = 0; | |
520 | else | |
521 | xprintf(", "); | |
522 | xprintf("%s", uaudio_apis[n]->name); | |
523 | } | |
524 | } | |
525 | xprintf("\n" | |
287ad384 RK |
526 | " --command, -e COMMAND Pipe audio to command.\n" |
527 | " --pause-mode, -P silence For -e: pauses send silence (default)\n" | |
528 | " --pause-mode, -P suspend For -e: pauses suspend writes\n" | |
9086a105 RK |
529 | " --help, -h Display usage message\n" |
530 | " --version, -V Display version number\n" | |
531 | ); | |
e83d0967 RK |
532 | xfclose(stdout); |
533 | exit(0); | |
534 | } | |
535 | ||
4fd38868 | 536 | static size_t playrtp_callback(void *buffer, |
7a2c7068 RK |
537 | size_t max_samples, |
538 | void attribute((unused)) *userdata) { | |
539 | size_t samples; | |
67d308e7 | 540 | int silent = 0; |
7a2c7068 RK |
541 | |
542 | pthread_mutex_lock(&lock); | |
543 | /* Get the next packet, junking any that are now in the past */ | |
544 | const struct packet *p = playrtp_next_packet(); | |
545 | if(p && contains(p, next_timestamp)) { | |
546 | /* This packet is ready to play; the desired next timestamp points | |
547 | * somewhere into it. */ | |
548 | ||
549 | /* Timestamp of end of packet */ | |
550 | const uint32_t packet_end = p->timestamp + p->nsamples; | |
551 | ||
552 | /* Offset of desired next timestamp into current packet */ | |
553 | const uint32_t offset = next_timestamp - p->timestamp; | |
554 | ||
555 | /* Pointer to audio data */ | |
556 | const uint16_t *ptr = (void *)(p->samples_raw + offset); | |
557 | ||
558 | /* Compute number of samples left in packet, limited to output buffer | |
559 | * size */ | |
560 | samples = packet_end - next_timestamp; | |
561 | if(samples > max_samples) | |
562 | samples = max_samples; | |
563 | ||
564 | /* Copy into buffer, converting to native endianness */ | |
565 | size_t i = samples; | |
566 | int16_t *bufptr = buffer; | |
567 | while(i > 0) { | |
568 | *bufptr++ = (int16_t)ntohs(*ptr++); | |
569 | --i; | |
570 | } | |
67d308e7 | 571 | silent = !!(p->flags & SILENT); |
7a2c7068 RK |
572 | } else { |
573 | /* There is no suitable packet. We introduce 0s up to the next packet, or | |
574 | * to fill the buffer if there's no next packet or that's too many. The | |
575 | * comparison with max_samples deals with the otherwise troubling overflow | |
576 | * case. */ | |
577 | samples = p ? p->timestamp - next_timestamp : max_samples; | |
578 | if(samples > max_samples) | |
579 | samples = max_samples; | |
580 | //info("infill by %zu", samples); | |
4fd38868 | 581 | memset(buffer, 0, samples * uaudio_sample_size); |
67d308e7 | 582 | silent = 1; |
7a2c7068 RK |
583 | } |
584 | /* Debug dump */ | |
585 | if(dump_buffer) { | |
586 | for(size_t i = 0; i < samples; ++i) { | |
4fd38868 | 587 | dump_buffer[dump_index++] = ((int16_t *)buffer)[i]; |
7a2c7068 RK |
588 | dump_index %= dump_size; |
589 | } | |
590 | } | |
591 | /* Advance timestamp */ | |
592 | next_timestamp += samples; | |
7edc7e42 RK |
593 | /* If we're getting behind then try to drop just silent packets |
594 | * | |
595 | * In theory this shouldn't be necessary. The server is supposed to send | |
596 | * packets at the right rate and compares the number of samples sent with the | |
597 | * time in order to ensure this. | |
598 | * | |
599 | * However, various things could throw this off: | |
600 | * | |
601 | * - the server's clock could advance at the wrong rate. This would cause it | |
602 | * to mis-estimate the right number of samples to have sent and | |
603 | * inappropriately throttle or speed up. | |
604 | * | |
605 | * - playback could happen at the wrong rate. If the playback host's sound | |
606 | * card has a slightly incorrect clock then eventually it will get out | |
607 | * of step. | |
608 | * | |
609 | * So if we play back slightly slower than the server sends for either of | |
610 | * these reasons then eventually our buffer, and the socket's buffer, will | |
611 | * fill, and the kernel will start dropping packets. The result is audible | |
612 | * and not very nice. | |
613 | * | |
614 | * Therefore if we're getting behind, we pre-emptively drop silent packets, | |
615 | * since a change in the duration of a silence is less noticeable than a | |
616 | * dropped packet from the middle of continuous music. | |
617 | * | |
618 | * (If things go wrong the other way then eventually we run out of packets to | |
619 | * play and are forced to play silence. This doesn't seem to happen in | |
620 | * practice but if it does then in the same way we can artificially extend | |
621 | * silent packets to compensate.) | |
622 | * | |
623 | * Dropped packets are always logged; use 'disorder-playrtp --monitor' to | |
624 | * track how close to target buffer occupancy we are on a once-a-minute | |
625 | * basis. | |
626 | */ | |
67d308e7 | 627 | if(nsamples > minbuffer && silent) { |
2e9ba080 RK |
628 | disorder_info("dropping %zu samples (%"PRIu32" > %"PRIu32")", |
629 | samples, nsamples, minbuffer); | |
67d308e7 RK |
630 | samples = 0; |
631 | } | |
ad535598 RK |
632 | /* Junk obsolete packets */ |
633 | playrtp_next_packet(); | |
7a2c7068 RK |
634 | pthread_mutex_unlock(&lock); |
635 | return samples; | |
636 | } | |
637 | ||
cca034e5 RK |
638 | static int compare_family(const struct ifaddrs *a, |
639 | const struct ifaddrs *b, | |
640 | int family) { | |
641 | int afamily = a->ifa_addr->sa_family; | |
642 | int bfamily = b->ifa_addr->sa_family; | |
643 | if(afamily != bfamily) { | |
644 | /* Preferred family wins */ | |
645 | if(afamily == family) return 1; | |
646 | if(bfamily == family) return -1; | |
647 | /* Either there's no preference or it doesn't help. Prefer IPv4 */ | |
648 | if(afamily == AF_INET) return 1; | |
649 | if(bfamily == AF_INET) return -1; | |
650 | /* Failing that prefer IPv6 */ | |
651 | if(afamily == AF_INET6) return 1; | |
652 | if(bfamily == AF_INET6) return -1; | |
653 | } | |
654 | return 0; | |
655 | } | |
656 | ||
657 | static int compare_flags(const struct ifaddrs *a, | |
658 | const struct ifaddrs *b) { | |
659 | unsigned aflags = a->ifa_flags, bflags = b->ifa_flags; | |
660 | /* Up interfaces are better than down ones */ | |
661 | unsigned aup = aflags & IFF_UP, bup = bflags & IFF_UP; | |
662 | if(aup != bup) | |
663 | return aup > bup ? 1 : -1; | |
ebd61a13 | 664 | #if IFF_DYNAMIC |
cca034e5 RK |
665 | /* Static addresses are better than dynamic */ |
666 | unsigned adynamic = aflags & IFF_DYNAMIC, bdynamic = bflags & IFF_DYNAMIC; | |
667 | if(adynamic != bdynamic) | |
668 | return adynamic < bdynamic ? 1 : -1; | |
ebd61a13 | 669 | #endif |
cca034e5 RK |
670 | unsigned aloopback = aflags & IFF_LOOPBACK, bloopback = bflags & IFF_LOOPBACK; |
671 | /* Static addresses are better than dynamic */ | |
672 | if(aloopback != bloopback) | |
673 | return aloopback < bloopback ? 1 : -1; | |
674 | return 0; | |
675 | } | |
676 | ||
677 | static int compare_interfaces(const struct ifaddrs *a, | |
678 | const struct ifaddrs *b, | |
679 | int family) { | |
680 | int c; | |
681 | if((c = compare_family(a, b, family))) return c; | |
682 | return compare_flags(a, b); | |
683 | } | |
684 | ||
e83d0967 | 685 | int main(int argc, char **argv) { |
a99c4e9a | 686 | int n, err; |
e83d0967 RK |
687 | struct addrinfo *res; |
688 | struct stringlist sl; | |
0b75463f | 689 | char *sockname; |
14b5913c | 690 | int rcvbuf, target_rcvbuf = -1; |
1f10f780 | 691 | socklen_t len; |
23205f9c RK |
692 | struct ip_mreq mreq; |
693 | struct ipv6_mreq mreq6; | |
cca034e5 | 694 | disorder_client *c = NULL; |
a7e9570a | 695 | char *address, *port; |
6fba990c RK |
696 | int is_multicast; |
697 | union any_sockaddr { | |
698 | struct sockaddr sa; | |
699 | struct sockaddr_in in; | |
700 | struct sockaddr_in6 in6; | |
701 | }; | |
702 | union any_sockaddr mgroup; | |
e9b635a3 | 703 | const char *dumpfile = 0; |
7a2c7068 | 704 | pthread_t ltid; |
b0619501 | 705 | int monitor = 0; |
983c3357 | 706 | static const int one = 1; |
e83d0967 | 707 | |
c5fbc6c7 | 708 | struct addrinfo prefs = { |
66613034 RK |
709 | .ai_flags = AI_PASSIVE, |
710 | .ai_family = PF_INET, | |
711 | .ai_socktype = SOCK_DGRAM, | |
712 | .ai_protocol = IPPROTO_UDP | |
e83d0967 RK |
713 | }; |
714 | ||
9d7a6129 RK |
715 | /* Timing information is often important to debugging playrtp, so we include |
716 | * timestamps in the logs */ | |
717 | logdate = 1; | |
e83d0967 | 718 | mem_init(); |
2e9ba080 | 719 | if(!setlocale(LC_CTYPE, "")) disorder_fatal(errno, "error calling setlocale"); |
ba32e50c | 720 | while((n = getopt_long(argc, argv, "hVdD:m:x:L:R:aocC:re:P:MA:", options, 0)) >= 0) { |
e83d0967 RK |
721 | switch(n) { |
722 | case 'h': help(); | |
3fbdc96d | 723 | case 'V': version("disorder-playrtp"); |
e83d0967 | 724 | case 'd': debugging = 1; break; |
e979b844 | 725 | case 'D': uaudio_set("device", optarg); break; |
1153fd23 | 726 | case 'm': minbuffer = 2 * atol(optarg); break; |
9086a105 | 727 | case 'x': maxbuffer = 2 * atol(optarg); break; |
345ebe66 | 728 | case 'L': logfp = fopen(optarg, "w"); break; |
1f10f780 | 729 | case 'R': target_rcvbuf = atoi(optarg); break; |
146e86fb | 730 | #if HAVE_ALSA_ASOUNDLIB_H |
ba32e50c RK |
731 | case 'a': |
732 | disorder_error(0, "deprecated option; use --api alsa instead"); | |
733 | backend = &uaudio_alsa; break; | |
c593cf7c | 734 | #endif |
a9f0ad12 | 735 | #if HAVE_SYS_SOUNDCARD_H || EMPEG_HOST |
ba32e50c RK |
736 | case 'o': |
737 | disorder_error(0, "deprecated option; use --api oss instead"); | |
738 | backend = &uaudio_oss; | |
739 | break; | |
c593cf7c | 740 | #endif |
741 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
ba32e50c RK |
742 | case 'c': |
743 | disorder_error(0, "deprecated option; use --api coreaudio instead"); | |
744 | backend = &uaudio_coreaudio; | |
745 | break; | |
c593cf7c | 746 | #endif |
ba32e50c | 747 | case 'A': backend = uaudio_find(optarg); break; |
a7e9570a | 748 | case 'C': configfile = optarg; break; |
a99c4e9a | 749 | case 's': control_socket = optarg; break; |
e9b635a3 | 750 | case 'r': dumpfile = optarg; break; |
e979b844 | 751 | case 'e': backend = &uaudio_command; uaudio_set("command", optarg); break; |
287ad384 | 752 | case 'P': uaudio_set("pause-mode", optarg); break; |
b0619501 | 753 | case 'M': monitor = 1; break; |
2e9ba080 | 754 | default: disorder_fatal(0, "invalid option"); |
e83d0967 RK |
755 | } |
756 | } | |
2e9ba080 | 757 | if(config_read(0, NULL)) disorder_fatal(0, "cannot read configuration"); |
163ed8a5 | 758 | /* Choose a sensible default audio backend */ |
06385470 RK |
759 | if(!backend) { |
760 | backend = uaudio_default(uaudio_apis, UAUDIO_API_CLIENT); | |
761 | if(!backend) | |
762 | disorder_fatal(0, "no default uaudio API found"); | |
763 | disorder_info("default audio API %s", backend->name); | |
764 | } | |
30a82196 RK |
765 | if(backend == &uaudio_rtp) { |
766 | /* This means that you have NO local sound output. This can happen if you | |
767 | * use a non-Apple GCC on a Mac (because it doesn't know how to compile | |
768 | * CoreAudio/AudioHardware.h). */ | |
769 | disorder_fatal(0, "cannot play RTP through RTP"); | |
770 | } | |
14b5913c MW |
771 | /* Set buffering parameters if not overridden */ |
772 | if(!minbuffer) { | |
773 | minbuffer = config->rtp_minbuffer; | |
774 | if(!minbuffer) minbuffer = (2*44100)*4/10; | |
775 | } | |
776 | if(!maxbuffer) { | |
777 | maxbuffer = config->rtp_maxbuffer; | |
778 | if(!maxbuffer) maxbuffer = 2 * minbuffer; | |
779 | } | |
780 | if(target_rcvbuf < 0) target_rcvbuf = config->rtp_rcvbuf; | |
e83d0967 RK |
781 | argc -= optind; |
782 | argv += optind; | |
a7e9570a RK |
783 | switch(argc) { |
784 | case 0: | |
14b5913c MW |
785 | sl.s = xcalloc(3, sizeof *sl.s); |
786 | if(config->rtp_always_request) { | |
787 | sl.s[0] = sl.s[1] = (/*unconst*/ char *)"-"; | |
788 | sl.n = 2; | |
789 | } else { | |
790 | /* Get configuration from server */ | |
791 | if(!(c = disorder_new(1))) exit(EXIT_FAILURE); | |
792 | if(disorder_connect(c)) exit(EXIT_FAILURE); | |
793 | if(disorder_rtp_address(c, &address, &port)) exit(EXIT_FAILURE); | |
794 | sl.s[0] = address; | |
795 | sl.s[1] = port; | |
796 | sl.n = 2; | |
797 | } | |
798 | /* If we're requesting a new stream then apply the local network address | |
799 | * overrides. | |
800 | */ | |
801 | if(!strcmp(sl.s[0], "-")) { | |
802 | if(config->rtp_request_address.port) | |
803 | byte_xasprintf(&sl.s[1], "%d", config->rtp_request_address.port); | |
804 | if(config->rtp_request_address.address) { | |
805 | sl.s[2] = sl.s[1]; | |
806 | sl.s[1] = config->rtp_request_address.address; | |
807 | sl.n = 3; | |
808 | } | |
809 | } | |
a7e9570a | 810 | break; |
169f1a6f | 811 | case 1: case 2: case 3: |
6fba990c | 812 | /* Use command-line ADDRESS+PORT or just PORT */ |
a7e9570a RK |
813 | sl.n = argc; |
814 | sl.s = argv; | |
815 | break; | |
816 | default: | |
2e9ba080 | 817 | disorder_fatal(0, "usage: disorder-playrtp [OPTIONS] [[ADDRESS] PORT]"); |
a7e9570a | 818 | } |
7077d53f RK |
819 | disorder_info("version "VERSION" process ID %lu", |
820 | (unsigned long)getpid()); | |
cca034e5 RK |
821 | struct sockaddr *addr; |
822 | socklen_t addr_len; | |
823 | if(!strcmp(sl.s[0], "-")) { | |
169f1a6f MW |
824 | /* Syntax: - [[ADDRESS] PORT]. Here, the PORT may be `-' to get the local |
825 | * kernel to choose. The ADDRESS may be omitted or `-' to pick something | |
826 | * suitable. */ | |
827 | const char *node, *svc; | |
828 | struct sockaddr *sa = 0; | |
829 | switch (sl.n) { | |
830 | #define NULLDASH(s) (strcmp((s), "-") ? (s) : 0) | |
831 | case 1: node = 0; svc = 0; break; | |
832 | case 2: node = 0; svc = NULLDASH(sl.s[1]); break; | |
833 | case 3: node = NULLDASH(sl.s[1]); svc = NULLDASH(sl.s[2]); break; | |
834 | default: disorder_fatal(0, "too many listening-address compoennts"); | |
835 | #undef NULLDASH | |
836 | } | |
d7255a30 MW |
837 | /* We'll need a connection to request the incoming stream, so open one if |
838 | * we don't have one already */ | |
839 | if(!c) { | |
840 | if(!(c = disorder_new(1))) exit(EXIT_FAILURE); | |
841 | if(disorder_connect(c)) exit(EXIT_FAILURE); | |
842 | } | |
169f1a6f MW |
843 | /* If no address was given, pick something sensible based on the known- |
844 | * working connectivity to the server */ | |
845 | if(!node) { | |
14b5913c MW |
846 | int family = config->rtp_request_address.af; |
847 | if(family == AF_UNSPEC) family = disorder_client_af(c); | |
169f1a6f MW |
848 | /* Get a list of interfaces */ |
849 | struct ifaddrs *ifa, *bestifa = NULL; | |
850 | if(getifaddrs(&ifa) < 0) | |
851 | disorder_fatal(errno, "error calling getifaddrs"); | |
852 | /* Try to pick a good one */ | |
853 | for(; ifa; ifa = ifa->ifa_next) { | |
854 | if(!ifa->ifa_addr) continue; | |
855 | if(bestifa == NULL | |
856 | || compare_interfaces(ifa, bestifa, family) > 0) | |
857 | bestifa = ifa; | |
858 | } | |
859 | if(!bestifa) | |
860 | disorder_fatal(0, "failed to select a network interface"); | |
861 | sa = bestifa->ifa_addr; | |
862 | switch(sa->sa_family) { | |
863 | case AF_INET: ((struct sockaddr_in *)sa)->sin_port = 0; break; | |
864 | case AF_INET6: ((struct sockaddr_in6 *)sa)->sin6_port = 0; break; | |
865 | default: assert(!"unexpected address family"); | |
866 | } | |
867 | prefs.ai_family = sa->sa_family; | |
868 | } | |
869 | /* If we have an address or port to resolve then do that now */ | |
870 | if (node || svc) { | |
871 | struct addrinfo *ai; | |
872 | char errbuf[1024]; | |
873 | int rc; | |
874 | if((rc = getaddrinfo(node, svc, &prefs, &ai))) | |
875 | disorder_fatal(0, "failed to resolve address `%s' and service `%s': %s", | |
876 | node ? node : "-", svc ? svc : "-", | |
877 | format_error(ec_getaddrinfo, rc, | |
878 | errbuf, sizeof(errbuf))); | |
879 | if(!sa) | |
880 | sa = ai->ai_addr; | |
881 | else { | |
882 | assert(sa->sa_family == ai->ai_addr->sa_family); | |
883 | switch(sa->sa_family) { | |
884 | case AF_INET: | |
885 | ((struct sockaddr_in *)sa)->sin_port = | |
886 | ((struct sockaddr_in *)ai->ai_addr)->sin_port; | |
887 | break; | |
888 | case AF_INET6: | |
889 | ((struct sockaddr_in6 *)sa)->sin6_port = | |
890 | ((struct sockaddr_in6 *)ai->ai_addr)->sin6_port; | |
891 | break; | |
892 | default: | |
893 | assert(!"unexpected address family"); | |
894 | } | |
895 | } | |
23205f9c | 896 | } |
169f1a6f MW |
897 | if((rtpfd = socket(sa->sa_family, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
898 | disorder_fatal(errno, "error creating socket (family %d)", | |
899 | sa->sa_family); | |
cca034e5 | 900 | /* Bind the address */ |
169f1a6f MW |
901 | if(bind(rtpfd, sa, |
902 | sa->sa_family == AF_INET | |
cca034e5 RK |
903 | ? sizeof (struct sockaddr_in) : sizeof (struct sockaddr_in6)) < 0) |
904 | disorder_fatal(errno, "error binding socket"); | |
905 | static struct sockaddr_storage bound_address; | |
906 | addr = (struct sockaddr *)&bound_address; | |
907 | addr_len = sizeof bound_address; | |
908 | if(getsockname(rtpfd, addr, &addr_len) < 0) | |
909 | disorder_fatal(errno, "error getting socket address"); | |
910 | /* Convert to string */ | |
911 | char addrname[128], portname[32]; | |
912 | if(getnameinfo(addr, addr_len, | |
913 | addrname, sizeof addrname, | |
914 | portname, sizeof portname, | |
915 | NI_NUMERICHOST|NI_NUMERICSERV) < 0) | |
916 | disorder_fatal(errno, "getnameinfo"); | |
917 | /* Ask for audio data */ | |
918 | if(disorder_rtp_request(c, addrname, portname)) exit(EXIT_FAILURE); | |
983c3357 | 919 | /* Report what we did */ |
7675ceab MW |
920 | disorder_info("listening on %s (stream requested)", |
921 | format_sockaddr(addr)); | |
983c3357 | 922 | } else { |
169f1a6f | 923 | if(sl.n > 2) disorder_fatal(0, "too many address components"); |
cca034e5 RK |
924 | /* Look up address and port */ |
925 | if(!(res = get_address(&sl, &prefs, &sockname))) | |
926 | exit(1); | |
927 | addr = res->ai_addr; | |
928 | addr_len = res->ai_addrlen; | |
929 | /* Create the socket */ | |
930 | if((rtpfd = socket(res->ai_family, | |
931 | res->ai_socktype, | |
932 | res->ai_protocol)) < 0) | |
933 | disorder_fatal(errno, "error creating socket"); | |
934 | /* Allow multiple listeners */ | |
935 | xsetsockopt(rtpfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one); | |
936 | is_multicast = multicast(addr); | |
937 | /* The multicast and unicast/broadcast cases are different enough that they | |
938 | * are totally split. Trying to find commonality between them causes more | |
939 | * trouble that it's worth. */ | |
940 | if(is_multicast) { | |
941 | /* Stash the multicast group address */ | |
942 | memcpy(&mgroup, addr, addr_len); | |
943 | switch(res->ai_addr->sa_family) { | |
944 | case AF_INET: | |
945 | mgroup.in.sin_port = 0; | |
946 | break; | |
947 | case AF_INET6: | |
948 | mgroup.in6.sin6_port = 0; | |
949 | break; | |
950 | default: | |
951 | disorder_fatal(0, "unsupported address family %d", | |
952 | (int)addr->sa_family); | |
953 | } | |
954 | /* Bind to to the multicast group address */ | |
955 | if(bind(rtpfd, addr, addr_len) < 0) | |
956 | disorder_fatal(errno, "error binding socket to %s", | |
957 | format_sockaddr(addr)); | |
958 | /* Add multicast group membership */ | |
959 | switch(mgroup.sa.sa_family) { | |
960 | case PF_INET: | |
961 | mreq.imr_multiaddr = mgroup.in.sin_addr; | |
962 | mreq.imr_interface.s_addr = 0; /* use primary interface */ | |
963 | if(setsockopt(rtpfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, | |
964 | &mreq, sizeof mreq) < 0) | |
965 | disorder_fatal(errno, "error calling setsockopt IP_ADD_MEMBERSHIP"); | |
966 | break; | |
967 | case PF_INET6: | |
968 | mreq6.ipv6mr_multiaddr = mgroup.in6.sin6_addr; | |
969 | memset(&mreq6.ipv6mr_interface, 0, sizeof mreq6.ipv6mr_interface); | |
970 | if(setsockopt(rtpfd, IPPROTO_IPV6, IPV6_JOIN_GROUP, | |
971 | &mreq6, sizeof mreq6) < 0) | |
972 | disorder_fatal(errno, "error calling setsockopt IPV6_JOIN_GROUP"); | |
973 | break; | |
974 | default: | |
975 | disorder_fatal(0, "unsupported address family %d", res->ai_family); | |
976 | } | |
977 | /* Report what we did */ | |
978 | disorder_info("listening on %s multicast group %s", | |
979 | format_sockaddr(addr), format_sockaddr(&mgroup.sa)); | |
980 | } else { | |
981 | /* Bind to 0/port */ | |
982 | switch(addr->sa_family) { | |
983 | case AF_INET: { | |
984 | struct sockaddr_in *in = (struct sockaddr_in *)addr; | |
983c3357 | 985 | |
cca034e5 RK |
986 | memset(&in->sin_addr, 0, sizeof (struct in_addr)); |
987 | break; | |
988 | } | |
989 | case AF_INET6: { | |
990 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr; | |
983c3357 | 991 | |
cca034e5 RK |
992 | memset(&in6->sin6_addr, 0, sizeof (struct in6_addr)); |
993 | break; | |
994 | } | |
995 | default: | |
996 | disorder_fatal(0, "unsupported family %d", (int)addr->sa_family); | |
997 | } | |
998 | if(bind(rtpfd, addr, addr_len) < 0) | |
999 | disorder_fatal(errno, "error binding socket to %s", | |
1000 | format_sockaddr(addr)); | |
1001 | /* Report what we did */ | |
1002 | disorder_info("listening on %s", format_sockaddr(addr)); | |
983c3357 | 1003 | } |
983c3357 | 1004 | } |
1f10f780 RK |
1005 | len = sizeof rcvbuf; |
1006 | if(getsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &len) < 0) | |
2e9ba080 | 1007 | disorder_fatal(errno, "error calling getsockopt SO_RCVBUF"); |
f0bae611 | 1008 | if(target_rcvbuf > rcvbuf) { |
1f10f780 RK |
1009 | if(setsockopt(rtpfd, SOL_SOCKET, SO_RCVBUF, |
1010 | &target_rcvbuf, sizeof target_rcvbuf) < 0) | |
2e9ba080 RK |
1011 | disorder_error(errno, "error calling setsockopt SO_RCVBUF %d", |
1012 | target_rcvbuf); | |
1f10f780 RK |
1013 | /* We try to carry on anyway */ |
1014 | else | |
2e9ba080 RK |
1015 | disorder_info("changed socket receive buffer from %d to %d", |
1016 | rcvbuf, target_rcvbuf); | |
1f10f780 | 1017 | } else |
2e9ba080 | 1018 | disorder_info("default socket receive buffer %d", rcvbuf); |
ad535598 | 1019 | //info("minbuffer %u maxbuffer %u", minbuffer, maxbuffer); |
1f10f780 | 1020 | if(logfp) |
2e9ba080 | 1021 | disorder_info("WARNING: -L option can impact performance"); |
a99c4e9a RK |
1022 | if(control_socket) { |
1023 | pthread_t tid; | |
1024 | ||
1025 | if((err = pthread_create(&tid, 0, control_thread, 0))) | |
2e9ba080 | 1026 | disorder_fatal(err, "pthread_create control_thread"); |
a99c4e9a | 1027 | } |
e9b635a3 RK |
1028 | if(dumpfile) { |
1029 | int fd; | |
1030 | unsigned char buffer[65536]; | |
1031 | size_t written; | |
1032 | ||
1033 | if((fd = open(dumpfile, O_RDWR|O_TRUNC|O_CREAT, 0666)) < 0) | |
2e9ba080 | 1034 | disorder_fatal(errno, "opening %s", dumpfile); |
e9b635a3 RK |
1035 | /* Fill with 0s to a suitable size */ |
1036 | memset(buffer, 0, sizeof buffer); | |
1037 | for(written = 0; written < dump_size * sizeof(int16_t); | |
1038 | written += sizeof buffer) { | |
1039 | if(write(fd, buffer, sizeof buffer) < 0) | |
2e9ba080 | 1040 | disorder_fatal(errno, "clearing %s", dumpfile); |
e9b635a3 RK |
1041 | } |
1042 | /* Map the buffer into memory for convenience */ | |
1043 | dump_buffer = mmap(0, dump_size * sizeof(int16_t), PROT_READ|PROT_WRITE, | |
1044 | MAP_SHARED, fd, 0); | |
1045 | if(dump_buffer == (void *)-1) | |
2e9ba080 RK |
1046 | disorder_fatal(errno, "mapping %s", dumpfile); |
1047 | disorder_info("dumping to %s", dumpfile); | |
e9b635a3 | 1048 | } |
4fd38868 RK |
1049 | /* Set up output. Currently we only support L16 so there's no harm setting |
1050 | * the format before we know what it is! */ | |
1051 | uaudio_set_format(44100/*Hz*/, 2/*channels*/, | |
1052 | 16/*bits/channel*/, 1/*signed*/); | |
de0ef46e | 1053 | uaudio_set("application", "disorder-playrtp"); |
3b9aa3e5 | 1054 | backend->configure(); |
7a2c7068 | 1055 | backend->start(playrtp_callback, NULL); |
af21fb6b | 1056 | if(backend->open_mixer) backend->open_mixer(); |
7a2c7068 RK |
1057 | /* We receive and convert audio data in a background thread */ |
1058 | if((err = pthread_create(<id, 0, listen_thread, 0))) | |
2e9ba080 | 1059 | disorder_fatal(err, "pthread_create listen_thread"); |
7a2c7068 RK |
1060 | /* We have a second thread to add received packets to the queue */ |
1061 | if((err = pthread_create(<id, 0, queue_thread, 0))) | |
2e9ba080 | 1062 | disorder_fatal(err, "pthread_create queue_thread"); |
7a2c7068 | 1063 | pthread_mutex_lock(&lock); |
b0619501 | 1064 | time_t lastlog = 0; |
7a2c7068 RK |
1065 | for(;;) { |
1066 | /* Wait for the buffer to fill up a bit */ | |
1067 | playrtp_fill_buffer(); | |
1068 | /* Start playing now */ | |
2e9ba080 | 1069 | disorder_info("Playing..."); |
7a2c7068 RK |
1070 | next_timestamp = pheap_first(&packets)->timestamp; |
1071 | active = 1; | |
d4170ca7 | 1072 | pthread_mutex_unlock(&lock); |
7a2c7068 | 1073 | backend->activate(); |
d4170ca7 | 1074 | pthread_mutex_lock(&lock); |
0e72bf84 RK |
1075 | /* Wait until the buffer empties out |
1076 | * | |
1077 | * If there's a packet that we can play right now then we definitely | |
1078 | * continue. | |
1079 | * | |
1080 | * Also if there's at least minbuffer samples we carry on regardless and | |
1081 | * insert silence. The assumption is there's been a pause but more data | |
1082 | * is now available. | |
1083 | */ | |
7a2c7068 RK |
1084 | while(nsamples >= minbuffer |
1085 | || (nsamples > 0 | |
4fd38868 | 1086 | && contains(pheap_first(&packets), next_timestamp))) { |
b0619501 | 1087 | if(monitor) { |
4265e5d3 | 1088 | time_t now = xtime(0); |
b0619501 RK |
1089 | |
1090 | if(now >= lastlog + 60) { | |
1091 | int offset = nsamples - minbuffer; | |
1092 | double offtime = (double)offset / (uaudio_rate * uaudio_channels); | |
2e9ba080 RK |
1093 | disorder_info("%+d samples off (%d.%02ds, %d bytes)", |
1094 | offset, | |
1095 | (int)fabs(offtime) * (offtime < 0 ? -1 : 1), | |
1096 | (int)(fabs(offtime) * 100) % 100, | |
1097 | offset * uaudio_bits / CHAR_BIT); | |
b0619501 RK |
1098 | lastlog = now; |
1099 | } | |
1100 | } | |
ad535598 | 1101 | //fprintf(stderr, "%8u/%u (%u) PLAYING\n", nsamples, maxbuffer, minbuffer); |
7a2c7068 | 1102 | pthread_cond_wait(&cond, &lock); |
4fd38868 | 1103 | } |
ad535598 RK |
1104 | #if 0 |
1105 | if(nsamples) { | |
1106 | struct packet *p = pheap_first(&packets); | |
1107 | fprintf(stderr, "nsamples=%u (%u) next_timestamp=%"PRIx32", first packet is [%"PRIx32",%"PRIx32")\n", | |
1108 | nsamples, minbuffer, next_timestamp,p->timestamp,p->timestamp+p->nsamples); | |
1109 | } | |
1110 | #endif | |
7a2c7068 | 1111 | /* Stop playing for a bit until the buffer re-fills */ |
d4170ca7 | 1112 | pthread_mutex_unlock(&lock); |
7a2c7068 | 1113 | backend->deactivate(); |
d4170ca7 | 1114 | pthread_mutex_lock(&lock); |
7a2c7068 RK |
1115 | active = 0; |
1116 | /* Go back round */ | |
1117 | } | |
e83d0967 RK |
1118 | return 0; |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | Local Variables: | |
1123 | c-basic-offset:2 | |
1124 | comment-column:40 | |
1125 | fill-column:79 | |
1126 | indent-tabs-mode:nil | |
1127 | End: | |
1128 | */ |