src/lib/raop_rtp.c

   1 /**
   2  *  Copyright (C) 2011-2012  Juho Vähä-Herttua
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Lesser General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2.1 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Lesser General Public License for more details.
  13  */
  14
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <assert.h>
  19 #include <errno.h>
  20
  21 #include "raop_rtp.h"
  22 #include "raop.h"
  23 #include "raop_buffer.h"
  24 #include "netutils.h"
  25 #include "utils.h"
  26 #include "compat.h"
  27 #include "logger.h"
  28
  29 #define NO_FLUSH (-42)
  30
  31 struct raop_rtp_s {
  32         logger_t *logger;
  33         raop_callbacks_t callbacks;
  34
  35         /* Buffer to handle all resends */
  36         raop_buffer_t *buffer;
  37
  38         /* Remote address as sockaddr */
  39         struct sockaddr_storage remote_saddr;
  40         socklen_t remote_saddr_len;
  41
  42         /* MUTEX LOCKED VARIABLES START */
  43         /* These variables only edited mutex locked */
  44         int running;
  45         int joined;
  46
  47         float volume;
  48         unsigned char *metadata;
  49         int metadata_len;
  50         unsigned char *coverart;
  51         int coverart_len;
  52
  53         int flush;
  54         thread_handle_t thread;
  55         mutex_handle_t run_mutex;
  56         /* MUTEX LOCKED VARIABLES END */
  57
  58         /* Remote control and timing ports */
  59         unsigned short control_rport;
  60         unsigned short timing_rport;
  61
  62         /* Sockets for control, timing and data */
  63         int csock, tsock, dsock;
  64
  65         /* Local control, timing and data ports */
  66         unsigned short control_lport;
  67         unsigned short timing_lport;
  68         unsigned short data_lport;
  69
  70         /* Initialized after the first control packet */
  71         struct sockaddr_storage control_saddr;
  72         socklen_t control_saddr_len;
  73         unsigned short control_seqnum;
  74 };
  75
  76 static int
  77 raop_rtp_parse_remote(raop_rtp_t *raop_rtp, const char *remote)
  78 {
  79         char *original;
  80         char *current;
  81         char *tmpstr;
  82         int family;
  83         int ret;
  84
  85         assert(raop_rtp);
  86
  87         current = original = strdup(remote);
  88         if (!original) {
  89                 return -1;
  90         }
  91         tmpstr = utils_strsep(&current, " ");
  92         if (strcmp(tmpstr, "IN")) {
  93                 free(original);
  94                 return -1;
  95         }
  96         tmpstr = utils_strsep(&current, " ");
  97         if (!strcmp(tmpstr, "IP4") && current) {
  98                 family = AF_INET;
  99         } else if (!strcmp(tmpstr, "IP6") && current) {
 100                 family = AF_INET6;
 101         } else {
 102                 free(original);
 103                 return -1;
 104         }
 105         if (strstr(current, ":")) {
 106                 /* FIXME: iTunes sends IP4 even with an IPv6 address, does it mean something */
 107                 family = AF_INET6;
 108         }
 109         ret = netutils_parse_address(family, current,
 110                                      &raop_rtp->remote_saddr,
 111                                      sizeof(raop_rtp->remote_saddr));
 112         if (ret < 0) {
 113                 free(original);
 114                 return -1;
 115         }
 116         raop_rtp->remote_saddr_len = ret;
 117         free(original);
 118         return 0;
 119 }
 120
 121 raop_rtp_t *
 122 raop_rtp_init(logger_t *logger, raop_callbacks_t *callbacks, const char *remote,
 123               const char *fmtp, const unsigned char *aeskey, const unsigned char *aesiv)
 124 {
 125         raop_rtp_t *raop_rtp;
 126
 127         assert(logger);
 128         assert(callbacks);
 129         assert(remote);
 130         assert(fmtp);
 131
 132         raop_rtp = calloc(1, sizeof(raop_rtp_t));
 133         if (!raop_rtp) {
 134                 return NULL;
 135         }
 136         raop_rtp->logger = logger;
 137         memcpy(&raop_rtp->callbacks, callbacks, sizeof(raop_callbacks_t));
 138         raop_rtp->buffer = raop_buffer_init(fmtp, aeskey, aesiv);
 139         if (!raop_rtp->buffer) {
 140                 free(raop_rtp);
 141                 return NULL;
 142         }
 143         if (raop_rtp_parse_remote(raop_rtp, remote) < 0) {
 144                 free(raop_rtp);
 145                 return NULL;
 146         }
 147
 148         raop_rtp->running = 0;
 149         raop_rtp->joined = 1;
 150         raop_rtp->flush = NO_FLUSH;
 151         MUTEX_CREATE(raop_rtp->run_mutex);
 152
 153         return raop_rtp;
 154 }
 155
 156 void
 157 raop_rtp_destroy(raop_rtp_t *raop_rtp)
 158 {
 159         if (raop_rtp) {
 160                 raop_rtp_stop(raop_rtp);
 161
 162                 MUTEX_DESTROY(raop_rtp->run_mutex);
 163                 raop_buffer_destroy(raop_rtp->buffer);
 164                 free(raop_rtp->metadata);
 165                 free(raop_rtp->coverart);
 166                 free(raop_rtp);
 167         }
 168 }
 169
 170 static int
 171 raop_rtp_init_sockets(raop_rtp_t *raop_rtp, int use_ipv6, int use_udp)
 172 {
 173         int csock = -1, tsock = -1, dsock = -1;
 174         unsigned short cport = 0, tport = 0, dport = 0;
 175
 176         assert(raop_rtp);
 177
 178         if (use_udp) {
 179                 csock = netutils_init_socket(&cport, use_ipv6, use_udp);
 180                 tsock = netutils_init_socket(&tport, use_ipv6, use_udp);
 181                 if (csock == -1 || tsock == -1) {
 182                         goto sockets_cleanup;
 183                 }
 184         }
 185         dsock = netutils_init_socket(&dport, use_ipv6, use_udp);
 186         if (dsock == -1) {
 187                 goto sockets_cleanup;
 188         }
 189
 190         /* Listen to the data socket if using TCP */
 191         if (!use_udp) {
 192                 if (listen(dsock, 1) < 0)
 193                         goto sockets_cleanup;
 194         }
 195
 196         /* Set socket descriptors */
 197         raop_rtp->csock = csock;
 198         raop_rtp->tsock = tsock;
 199         raop_rtp->dsock = dsock;
 200
 201         /* Set port values */
 202         raop_rtp->control_lport = cport;
 203         raop_rtp->timing_lport = tport;
 204         raop_rtp->data_lport = dport;
 205         return 0;
 206
 207 sockets_cleanup:
 208         if (csock != -1) closesocket(csock);
 209         if (tsock != -1) closesocket(tsock);
 210         if (dsock != -1) closesocket(dsock);
 211         return -1;
 212 }
 213
 214 static int
 215 raop_rtp_resend_callback(void *opaque, unsigned short seqnum, unsigned short count)
 216 {
 217         raop_rtp_t *raop_rtp = opaque;
 218         unsigned char packet[8];
 219         unsigned short ourseqnum;
 220         struct sockaddr *addr;
 221         socklen_t addrlen;
 222         int ret;
 223
 224         addr = (struct sockaddr *)&raop_rtp->control_saddr;
 225         addrlen = raop_rtp->control_saddr_len;
 226
 227         logger_log(raop_rtp->logger, LOGGER_DEBUG, "Got resend request %d %d", seqnum, count);
 228         ourseqnum = raop_rtp->control_seqnum++;
 229
 230         /* Fill the request buffer */
 231         packet[0] = 0x80;
 232         packet[1] = 0x55|0x80;
 233         packet[2] = (ourseqnum >> 8);
 234         packet[3] =  ourseqnum;
 235         packet[4] = (seqnum >> 8);
 236         packet[5] =  seqnum;
 237         packet[6] = (count >> 8);
 238         packet[7] =  count;
 239
 240         ret = sendto(raop_rtp->csock, (const char *)packet, sizeof(packet), 0, addr, addrlen);
 241         if (ret == -1) {
 242                 logger_log(raop_rtp->logger, LOGGER_WARNING, "Resend failed: %d", SOCKET_GET_ERROR());
 243         }
 244
 245         return 0;
 246 }
 247
 248 static int
 249 raop_rtp_process_events(raop_rtp_t *raop_rtp, void *cb_data, float *volume)
 250 {
 251         int flush;
 252         int volume_changed;
 253         unsigned char *metadata;
 254         int metadata_len;
 255         unsigned char *coverart;
 256         int coverart_len;
 257
 258         assert(raop_rtp);
 259         assert(volume);
 260
 261         MUTEX_LOCK(raop_rtp->run_mutex);
 262         if (!raop_rtp->running) {
 263                 MUTEX_UNLOCK(raop_rtp->run_mutex);
 264                 return 1;
 265         }
 266
 267         /* Read the volume level */
 268         volume_changed = (*volume != raop_rtp->volume);
 269         *volume = raop_rtp->volume;
 270
 271         /* Read the flush value */
 272         flush = raop_rtp->flush;
 273         raop_rtp->flush = NO_FLUSH;
 274
 275         /* Read the metadata */
 276         metadata = raop_rtp->metadata;
 277         metadata_len = raop_rtp->metadata_len;
 278         raop_rtp->metadata = NULL;
 279         raop_rtp->metadata_len = 0;
 280
 281         /* Read the coverart */
 282         coverart = raop_rtp->coverart;
 283         coverart_len = raop_rtp->coverart_len;
 284         raop_rtp->coverart = NULL;
 285         raop_rtp->coverart_len = 0;
 286         MUTEX_UNLOCK(raop_rtp->run_mutex);
 287
 288         /* Call set_volume callback if changed */
 289         if (volume_changed) {
 290                 if (raop_rtp->callbacks.audio_set_volume) {
 291                         raop_rtp->callbacks.audio_set_volume(raop_rtp->callbacks.cls, cb_data, *volume);
 292                 }
 293         }
 294
 295         /* Handle flush if requested */
 296         if (flush != NO_FLUSH) {
 297                 raop_buffer_flush(raop_rtp->buffer, flush);
 298                 if (raop_rtp->callbacks.audio_flush) {
 299                         raop_rtp->callbacks.audio_flush(raop_rtp->callbacks.cls, cb_data);
 300                 }
 301         }
 302         if (metadata != NULL) {
 303                 if (raop_rtp->callbacks.audio_set_metadata) {
 304                         raop_rtp->callbacks.audio_set_metadata(raop_rtp->callbacks.cls, cb_data, metadata, metadata_len);
 305                 }
 306                 free(metadata);
 307                 metadata = NULL;
 308         }
 309         if (coverart != NULL) {
 310                 if (raop_rtp->callbacks.audio_set_coverart) {
 311                         raop_rtp->callbacks.audio_set_coverart(raop_rtp->callbacks.cls, cb_data, coverart, coverart_len);
 312                 }
 313                 free(coverart);
 314                 coverart = NULL;
 315         }
 316         return 0;
 317 }
 318
 319 static THREAD_RETVAL
 320 raop_rtp_thread_udp(void *arg)
 321 {
 322         raop_rtp_t *raop_rtp = arg;
 323         unsigned char packet[RAOP_PACKET_LEN];
 324         unsigned int packetlen;
 325         struct sockaddr_storage saddr;
 326         socklen_t saddrlen;
 327         float volume = 0.0;
 328
 329         const ALACSpecificConfig *config;
 330         void *cb_data = NULL;
 331
 332         assert(raop_rtp);
 333
 334         config = raop_buffer_get_config(raop_rtp->buffer);
 335         cb_data = raop_rtp->callbacks.audio_init(raop_rtp->callbacks.cls,
 336                                        config->bitDepth,
 337                                        config->numChannels,
 338                                        config->sampleRate);
 339
 340         while(1) {
 341                 fd_set rfds;
 342                 struct timeval tv;
 343                 int nfds, ret;
 344
 345                 /* Check if we are still running and process callbacks */
 346                 if (raop_rtp_process_events(raop_rtp, cb_data, &volume)) {
 347                         break;
 348                 }
 349
 350                 /* Set timeout value to 5ms */
 351                 tv.tv_sec = 0;
 352                 tv.tv_usec = 5000;
 353
 354                 /* Get the correct nfds value */
 355                 nfds = raop_rtp->csock+1;
 356                 if (raop_rtp->tsock >= nfds)
 357                         nfds = raop_rtp->tsock+1;
 358                 if (raop_rtp->dsock >= nfds)
 359                         nfds = raop_rtp->dsock+1;
 360
 361                 /* Set rfds and call select */
 362                 FD_ZERO(&rfds);
 363                 FD_SET(raop_rtp->csock, &rfds);
 364                 FD_SET(raop_rtp->tsock, &rfds);
 365                 FD_SET(raop_rtp->dsock, &rfds);
 366                 ret = select(nfds, &rfds, NULL, NULL, &tv);
 367                 if (ret == 0) {
 368                         /* Timeout happened */
 369                         continue;
 370                 } else if (ret == -1) {
 371                         /* FIXME: Error happened */
 372                         break;
 373                 }
 374
 375                 if (FD_ISSET(raop_rtp->csock, &rfds)) {
 376                         saddrlen = sizeof(saddr);
 377                         packetlen = recvfrom(raop_rtp->csock, (char *)packet, sizeof(packet), 0,
 378                                              (struct sockaddr *)&saddr, &saddrlen);
 379
 380                         /* Get the destination address here, because we need the sin6_scope_id */
 381                         memcpy(&raop_rtp->control_saddr, &saddr, saddrlen);
 382                         raop_rtp->control_saddr_len = saddrlen;
 383
 384                         if (packetlen >= 12) {
 385                                 char type = packet[1] & ~0x80;
 386
 387                                 logger_log(raop_rtp->logger, LOGGER_DEBUG, "Got control packet of type 0x%02x", type);
 388                                 if (type == 0x56) {
 389                                         /* Handle resent data packet */
 390                                         int ret = raop_buffer_queue(raop_rtp->buffer, packet+4, packetlen-4, 1);
 391                                         assert(ret >= 0);
 392                                 }
 393                         }
 394                 } else if (FD_ISSET(raop_rtp->tsock, &rfds)) {
 395                         logger_log(raop_rtp->logger, LOGGER_INFO, "Would have timing packet in queue");
 396                 } else if (FD_ISSET(raop_rtp->dsock, &rfds)) {
 397                         saddrlen = sizeof(saddr);
 398                         packetlen = recvfrom(raop_rtp->dsock, (char *)packet, sizeof(packet), 0,
 399                                              (struct sockaddr *)&saddr, &saddrlen);
 400                         if (packetlen >= 12) {
 401                                 int no_resend = (raop_rtp->control_rport == 0);
 402                                 int ret;
 403
 404                                 const void *audiobuf;
 405                                 int audiobuflen;
 406
 407                                 ret = raop_buffer_queue(raop_rtp->buffer, packet, packetlen, 1);
 408                                 assert(ret >= 0);
 409
 410                                 /* Decode all frames in queue */
 411                                 while ((audiobuf = raop_buffer_dequeue(raop_rtp->buffer, &audiobuflen, no_resend))) {
 412                                         raop_rtp->callbacks.audio_process(raop_rtp->callbacks.cls, cb_data, audiobuf, audiobuflen);
 413                                 }
 414
 415                                 /* Handle possible resend requests */
 416                                 if (!no_resend) {
 417                                         raop_buffer_handle_resends(raop_rtp->buffer, raop_rtp_resend_callback, raop_rtp);
 418                                 }
 419                         }
 420                 }
 421         }
 422         logger_log(raop_rtp->logger, LOGGER_INFO, "Exiting UDP RAOP thread");
 423         raop_rtp->callbacks.audio_destroy(raop_rtp->callbacks.cls, cb_data);
 424
 425         return 0;
 426 }
 427
 428 static THREAD_RETVAL
 429 raop_rtp_thread_tcp(void *arg)
 430 {
 431         raop_rtp_t *raop_rtp = arg;
 432         int stream_fd = -1;
 433         unsigned char packet[RAOP_PACKET_LEN];
 434         unsigned int packetlen = 0;
 435         float volume = 0.0;
 436
 437         const ALACSpecificConfig *config;
 438         void *cb_data = NULL;
 439
 440         assert(raop_rtp);
 441
 442         config = raop_buffer_get_config(raop_rtp->buffer);
 443         cb_data = raop_rtp->callbacks.audio_init(raop_rtp->callbacks.cls,
 444                                        config->bitDepth,
 445                                        config->numChannels,
 446                                        config->sampleRate);
 447
 448         while (1) {
 449                 fd_set rfds;
 450                 struct timeval tv;
 451                 int nfds, ret;
 452
 453                 /* Check if we are still running and process callbacks */
 454                 if (raop_rtp_process_events(raop_rtp, cb_data, &volume)) {
 455                         break;
 456                 }
 457
 458                 /* Set timeout value to 5ms */
 459                 tv.tv_sec = 0;
 460                 tv.tv_usec = 5000;
 461
 462                 /* Get the correct nfds value and set rfds */
 463                 FD_ZERO(&rfds);
 464                 if (stream_fd == -1) {
 465                         FD_SET(raop_rtp->dsock, &rfds);
 466                         nfds = raop_rtp->dsock+1;
 467                 } else {
 468                         FD_SET(stream_fd, &rfds);
 469                         nfds = stream_fd+1;
 470                 }
 471                 ret = select(nfds, &rfds, NULL, NULL, &tv);
 472                 if (ret == 0) {
 473                         /* Timeout happened */
 474                         continue;
 475                 } else if (ret == -1) {
 476                         /* FIXME: Error happened */
 477                         logger_log(raop_rtp->logger, LOGGER_INFO, "Error in select");
 478                         break;
 479                 }
 480                 if (stream_fd == -1 && FD_ISSET(raop_rtp->dsock, &rfds)) {
 481                         struct sockaddr_storage saddr;
 482                         socklen_t saddrlen;
 483
 484                         logger_log(raop_rtp->logger, LOGGER_INFO, "Accepting client");
 485                         saddrlen = sizeof(saddr);
 486                         stream_fd = accept(raop_rtp->dsock, (struct sockaddr *)&saddr, &saddrlen);
 487                         if (stream_fd == -1) {
 488                                 /* FIXME: Error happened */
 489                                 logger_log(raop_rtp->logger, LOGGER_INFO, "Error in accept %d %s", errno, strerror(errno));
 490                                 break;
 491                         }
 492                 }
 493                 if (stream_fd != -1 && FD_ISSET(stream_fd, &rfds)) {
 494                         unsigned int rtplen=0;
 495
 496                         const void *audiobuf;
 497                         int audiobuflen;
 498
 499                         ret = recv(stream_fd, (char *)(packet+packetlen), sizeof(packet)-packetlen, 0);
 500                         if (ret == 0) {
 501                                 /* TCP socket closed */
 502                                 logger_log(raop_rtp->logger, LOGGER_INFO, "TCP socket closed");
 503                                 break;
 504                         } else if (ret == -1) {
 505                                 /* FIXME: Error happened */
 506                                 logger_log(raop_rtp->logger, LOGGER_INFO, "Error in recv");
 507                                 break;
 508                         }
 509                         packetlen += ret;
 510
 511                         /* Check that we have enough bytes */
 512                         if (packetlen < 4) {
 513                                 continue;
 514                         }
 515                         if (packet[0] != '$' || packet[1] != '\0') {
 516                                 /* FIXME: Incorrect RTP magic bytes */
 517                                 break;
 518                         }
 519                         rtplen = (packet[2] << 8) | packet[3];
 520                         if (rtplen > sizeof(packet)) {
 521                                 /* FIXME: Too long packet */
 522                                 logger_log(raop_rtp->logger, LOGGER_INFO, "Error, packet too long %d", rtplen);
 523                                 break;
 524                         }
 525                         if (packetlen < 4+rtplen) {
 526                                 continue;
 527                         }
 528
 529                         /* Packet is valid, process it */
 530                         ret = raop_buffer_queue(raop_rtp->buffer, packet+4, rtplen, 0);
 531                         assert(ret >= 0);
 532
 533                         /* Remove processed bytes from packet buffer */
 534                         memmove(packet, packet+4+rtplen, packetlen-rtplen);
 535                         packetlen -= 4+rtplen;
 536
 537                         /* Decode the received frame */
 538                         if ((audiobuf = raop_buffer_dequeue(raop_rtp->buffer, &audiobuflen, 1))) {
 539                                 raop_rtp->callbacks.audio_process(raop_rtp->callbacks.cls, cb_data, audiobuf, audiobuflen);
 540                         }
 541                 }
 542         }
 543
 544         /* Close the stream file descriptor */
 545         if (stream_fd != -1) {
 546                 closesocket(stream_fd);
 547         }
 548
 549         logger_log(raop_rtp->logger, LOGGER_INFO, "Exiting TCP RAOP thread");
 550         raop_rtp->callbacks.audio_destroy(raop_rtp->callbacks.cls, cb_data);
 551
 552         return 0;
 553 }
 554
 555 void
 556 raop_rtp_start(raop_rtp_t *raop_rtp, int use_udp, unsigned short control_rport, unsigned short timing_rport,
 557                unsigned short *control_lport, unsigned short *timing_lport, unsigned short *data_lport)
 558 {
 559         int use_ipv6 = 0;
 560
 561         assert(raop_rtp);
 562
 563         MUTEX_LOCK(raop_rtp->run_mutex);
 564         if (raop_rtp->running || !raop_rtp->joined) {
 565                 MUTEX_UNLOCK(raop_rtp->run_mutex);
 566                 return;
 567         }
 568
 569         /* Initialize ports and sockets */
 570         raop_rtp->control_rport = control_rport;
 571         raop_rtp->timing_rport = timing_rport;
 572         if (raop_rtp->remote_saddr.ss_family == AF_INET6) {
 573                 use_ipv6 = 1;
 574         }
 575         if (raop_rtp_init_sockets(raop_rtp, use_ipv6, use_udp) < 0) {
 576                 logger_log(raop_rtp->logger, LOGGER_INFO, "Initializing sockets failed");
 577                 MUTEX_UNLOCK(raop_rtp->run_mutex);
 578                 return;
 579         }
 580         if (control_lport) *control_lport = raop_rtp->control_lport;
 581         if (timing_lport) *timing_lport = raop_rtp->timing_lport;
 582         if (data_lport) *data_lport = raop_rtp->data_lport;
 583
 584         /* Create the thread and initialize running values */
 585         raop_rtp->running = 1;
 586         raop_rtp->joined = 0;
 587         if (use_udp) {
 588                 THREAD_CREATE(raop_rtp->thread, raop_rtp_thread_udp, raop_rtp);
 589         } else {
 590                 THREAD_CREATE(raop_rtp->thread, raop_rtp_thread_tcp, raop_rtp);
 591         }
 592         MUTEX_UNLOCK(raop_rtp->run_mutex);
 593 }
 594
 595 void
 596 raop_rtp_set_volume(raop_rtp_t *raop_rtp, float volume)
 597 {
 598         assert(raop_rtp);
 599
 600         if (volume > 0.0f) {
 601                 volume = 0.0f;
 602         } else if (volume < -144.0f) {
 603                 volume = -144.0f;
 604         }
 605
 606         /* Set volume in thread instead */
 607         MUTEX_LOCK(raop_rtp->run_mutex);
 608         raop_rtp->volume = volume;
 609         MUTEX_UNLOCK(raop_rtp->run_mutex);
 610 }
 611
 612 void
 613 raop_rtp_set_metadata(raop_rtp_t *raop_rtp, const char *data, int datalen)
 614 {
 615         unsigned char *metadata;
 616
 617         assert(raop_rtp);
 618
 619         if (datalen <= 0) {
 620                 return;
 621         }
 622         metadata = malloc(datalen);
 623         assert(metadata);
 624         memcpy(metadata, data, datalen);
 625
 626         /* Set metadata in thread instead */
 627         MUTEX_LOCK(raop_rtp->run_mutex);
 628         raop_rtp->metadata = metadata;
 629         raop_rtp->metadata_len = datalen;
 630         MUTEX_UNLOCK(raop_rtp->run_mutex);
 631 }
 632
 633 void
 634 raop_rtp_set_coverart(raop_rtp_t *raop_rtp, const char *data, int datalen)
 635 {
 636         unsigned char *coverart;
 637
 638         assert(raop_rtp);
 639
 640         if (datalen <= 0) {
 641                 return;
 642         }
 643         coverart = malloc(datalen);
 644         assert(coverart);
 645         memcpy(coverart, data, datalen);
 646
 647         /* Set coverart in thread instead */
 648         MUTEX_LOCK(raop_rtp->run_mutex);
 649         raop_rtp->coverart = coverart;
 650         raop_rtp->coverart_len = datalen;
 651         MUTEX_UNLOCK(raop_rtp->run_mutex);
 652 }
 653
 654 void
 655 raop_rtp_flush(raop_rtp_t *raop_rtp, int next_seq)
 656 {
 657         assert(raop_rtp);
 658
 659         /* Call flush in thread instead */
 660         MUTEX_LOCK(raop_rtp->run_mutex);
 661         raop_rtp->flush = next_seq;
 662         MUTEX_UNLOCK(raop_rtp->run_mutex);
 663 }
 664
 665 void
 666 raop_rtp_stop(raop_rtp_t *raop_rtp)
 667 {
 668         assert(raop_rtp);
 669
 670         /* Check that we are running and thread is not
 671          * joined (should never be while still running) */
 672         MUTEX_LOCK(raop_rtp->run_mutex);
 673         if (!raop_rtp->running || raop_rtp->joined) {
 674                 MUTEX_UNLOCK(raop_rtp->run_mutex);
 675                 return;
 676         }
 677         raop_rtp->running = 0;
 678         MUTEX_UNLOCK(raop_rtp->run_mutex);
 679
 680         /* Join the thread */
 681         THREAD_JOIN(raop_rtp->thread);
 682         if (raop_rtp->csock != -1) closesocket(raop_rtp->csock);
 683         if (raop_rtp->tsock != -1) closesocket(raop_rtp->tsock);
 684         if (raop_rtp->dsock != -1) closesocket(raop_rtp->dsock);
 685
 686         /* Flush buffer into initial state */
 687         raop_buffer_flush(raop_rtp->buffer, -1);
 688
 689         /* Mark thread as joined */
 690         MUTEX_LOCK(raop_rtp->run_mutex);
 691         raop_rtp->joined = 1;
 692         MUTEX_UNLOCK(raop_rtp->run_mutex);
 693 }