code.delx.au - pulseaudio/blob - src/modules/module-raop-sink.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2008 Colin Guthrie
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdlib.h>
  28 #include <sys/stat.h>
  29 #include <stdio.h>
  30 #include <errno.h>
  31 #include <string.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <limits.h>
  35 #include <poll.h>
  36 #include <sys/socket.h>
  37 #include <netinet/in.h>
  38 #include <netinet/tcp.h>
  39 #include <sys/ioctl.h>
  40
  41 #ifdef HAVE_LINUX_SOCKIOS_H
  42 #include <linux/sockios.h>
  43 #endif
  44
  45 #include <pulse/xmalloc.h>
  46 #include <pulse/timeval.h>
  47
  48 #include <pulsecore/core-error.h>
  49 #include <pulsecore/iochannel.h>
  50 #include <pulsecore/sink.h>
  51 #include <pulsecore/module.h>
  52 #include <pulsecore/core-util.h>
  53 #include <pulsecore/modargs.h>
  54 #include <pulsecore/log.h>
  55 #include <pulsecore/socket-client.h>
  56 #include <pulsecore/authkey.h>
  57 #include <pulsecore/thread-mq.h>
  58 #include <pulsecore/thread.h>
  59 #include <pulsecore/time-smoother.h>
  60 #include <pulsecore/rtclock.h>
  61 #include <pulsecore/socket-util.h>
  62
  63 #include "module-raop-sink-symdef.h"
  64 #include "rtp.h"
  65 #include "sdp.h"
  66 #include "sap.h"
  67 #include "raop_client.h"
  68
  69 PA_MODULE_AUTHOR("Colin Guthrie");
  70 PA_MODULE_DESCRIPTION("RAOP Sink (Apple Airtunes)");
  71 PA_MODULE_VERSION(PACKAGE_VERSION);
  72 PA_MODULE_LOAD_ONCE(FALSE);
  73 PA_MODULE_USAGE(
  74         "sink_name=<name for the sink> "
  75         "server=<address>  "
  76         "format=<sample format> "
  77         "channels=<number of channels> "
  78         "rate=<sample rate>");
  79
  80 #define DEFAULT_SINK_NAME "airtunes"
  81
  82 struct userdata {
  83     pa_core *core;
  84     pa_module *module;
  85     pa_sink *sink;
  86
  87     pa_thread_mq thread_mq;
  88     pa_rtpoll *rtpoll;
  89     pa_rtpoll_item *rtpoll_item;
  90     pa_thread *thread;
  91
  92     pa_memchunk raw_memchunk;
  93     pa_memchunk encoded_memchunk;
  94
  95     void *write_data;
  96     size_t write_length, write_index;
  97
  98     void *read_data;
  99     size_t read_length, read_index;
 100
 101     pa_usec_t latency;
 102
 103     pa_volume_t volume;
 104     pa_bool_t muted;
 105
 106     /*esd_format_t format;*/
 107     int32_t rate;
 108
 109     pa_smoother *smoother;
 110     int fd;
 111
 112     int64_t offset;
 113     int64_t encoding_overhead;
 114     int32_t next_encoding_overhead;
 115     double encoding_ratio;
 116
 117     pa_raop_client *raop;
 118
 119     size_t block_size;
 120 };
 121
 122 static const char* const valid_modargs[] = {
 123     "server",
 124     "rate",
 125     "format",
 126     "channels",
 127     "sink_name",
 128     NULL
 129 };
 130
 131 enum {
 132     SINK_MESSAGE_PASS_SOCKET = PA_SINK_MESSAGE_MAX,
 133     SINK_MESSAGE_RIP_SOCKET
 134 };
 135
 136 static void on_connection(PA_GCC_UNUSED int fd, void*userdata) {
 137     struct userdata *u = userdata;
 138     pa_assert(u);
 139
 140     pa_assert(u->fd < 0);
 141     u->fd = fd;
 142
 143     /* Set the initial volume */
 144     pa_raop_client_set_volume(u->raop, u->volume);
 145
 146     pa_log_debug("Connection authenticated, handing fd to IO thread...");
 147
 148     pa_asyncmsgq_post(u->thread_mq.inq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_PASS_SOCKET, NULL, 0, NULL, NULL);
 149 }
 150
 151 static void on_close(void*userdata) {
 152     struct userdata *u = userdata;
 153     pa_assert(u);
 154
 155     pa_log_debug("Connection closed, informing IO thread...");
 156
 157     pa_asyncmsgq_post(u->thread_mq.inq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_RIP_SOCKET, NULL, 0, NULL, NULL);
 158 }
 159
 160 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
 161     struct userdata *u = PA_SINK(o)->userdata;
 162
 163     switch (code) {
 164
 165         case PA_SINK_MESSAGE_SET_STATE:
 166
 167             switch ((pa_sink_state_t) PA_PTR_TO_UINT(data)) {
 168
 169                 case PA_SINK_SUSPENDED:
 170                     pa_assert(PA_SINK_IS_OPENED(u->sink->thread_info.state));
 171
 172                     pa_smoother_pause(u->smoother, pa_rtclock_usec());
 173
 174                     /* Issue a FLUSH if we are connected */
 175                     if (u->fd >= 0) {
 176                         pa_raop_flush(u->raop);
 177                     }
 178                     break;
 179
 180                 case PA_SINK_IDLE:
 181                 case PA_SINK_RUNNING:
 182
 183                     if (u->sink->thread_info.state == PA_SINK_SUSPENDED) {
 184                         pa_smoother_resume(u->smoother, pa_rtclock_usec());
 185
 186                         /* The connection can be closed when idle, so check to
 187                            see if we need to reestablish it */
 188                         if (u->fd < 0)
 189                             pa_raop_connect(u->raop);
 190                         else
 191                             pa_raop_flush(u->raop);
 192                     }
 193
 194                     break;
 195
 196                 case PA_SINK_UNLINKED:
 197                 case PA_SINK_INIT:
 198                 case PA_SINK_INVALID_STATE:
 199                     ;
 200             }
 201
 202             break;
 203
 204         case PA_SINK_MESSAGE_GET_LATENCY: {
 205             pa_usec_t w, r;
 206
 207             r = pa_smoother_get(u->smoother, pa_rtclock_usec());
 208             w = pa_bytes_to_usec((u->offset - u->encoding_overhead + (u->encoded_memchunk.length / u->encoding_ratio)), &u->sink->sample_spec);
 209
 210             *((pa_usec_t*) data) = w > r ? w - r : 0;
 211             break;
 212         }
 213
 214         case SINK_MESSAGE_PASS_SOCKET: {
 215             struct pollfd *pollfd;
 216
 217             pa_assert(!u->rtpoll_item);
 218
 219             u->rtpoll_item = pa_rtpoll_item_new(u->rtpoll, PA_RTPOLL_NEVER, 1);
 220             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
 221             pollfd->fd = u->fd;
 222             pollfd->events = POLLOUT;
 223             /*pollfd->events = */pollfd->revents = 0;
 224
 225             if (u->sink->thread_info.state == PA_SINK_SUSPENDED) {
 226                 /* Our stream has been suspended so we just flush it.... */
 227                 pa_raop_flush(u->raop);
 228             }
 229             return 0;
 230         }
 231
 232         case SINK_MESSAGE_RIP_SOCKET: {
 233             pa_assert(u->fd >= 0);
 234
 235             pa_close(u->fd);
 236             u->fd = -1;
 237
 238             if (u->sink->thread_info.state == PA_SINK_SUSPENDED) {
 239
 240                 pa_log_debug("RTSP control connection closed, but we're suspended so let's not worry about it... we'll open it again later");
 241
 242                 if (u->rtpoll_item)
 243                     pa_rtpoll_item_free(u->rtpoll_item);
 244                 u->rtpoll_item = NULL;
 245             } else {
 246                 /* Quesiton: is this valid here: or should we do some sort of:
 247                    return pa_sink_process_msg(PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL);
 248                    ?? */
 249                 pa_module_unload_request(u->module, TRUE);
 250             }
 251             return 0;
 252         }
 253     }
 254
 255     return pa_sink_process_msg(o, code, data, offset, chunk);
 256 }
 257
 258 static void sink_get_volume_cb(pa_sink *s) {
 259     struct userdata *u = s->userdata;
 260     int i;
 261
 262     pa_assert(u);
 263
 264     for (i = 0; i < s->sample_spec.channels; i++)
 265         s->virtual_volume.values[i] = u->volume;
 266 }
 267
 268 static void sink_set_volume_cb(pa_sink *s) {
 269     struct userdata *u = s->userdata;
 270     int rv;
 271
 272     pa_assert(u);
 273
 274     /* If we're muted, we fake it */
 275     if (u->muted)
 276         return;
 277
 278     pa_assert(s->sample_spec.channels > 0);
 279
 280     /* Avoid pointless volume sets */
 281     if (u->volume == s->virtual_volume.values[0])
 282         return;
 283
 284     rv = pa_raop_client_set_volume(u->raop, s->virtual_volume.values[0]);
 285     if (0 == rv)
 286         u->volume = s->virtual_volume.values[0];
 287 }
 288
 289 static void sink_get_mute_cb(pa_sink *s) {
 290     struct userdata *u = s->userdata;
 291
 292     pa_assert(u);
 293
 294     s->muted = u->muted;
 295 }
 296
 297 static void sink_set_mute_cb(pa_sink *s) {
 298     struct userdata *u = s->userdata;
 299
 300     pa_assert(u);
 301
 302     pa_raop_client_set_volume(u->raop, (s->muted ? PA_VOLUME_MUTED : u->volume));
 303     u->muted = s->muted;
 304 }
 305
 306 static void thread_func(void *userdata) {
 307     struct userdata *u = userdata;
 308     int write_type = 0;
 309     pa_memchunk silence;
 310     uint32_t silence_overhead = 0;
 311     double silence_ratio = 0;
 312
 313     pa_assert(u);
 314
 315     pa_log_debug("Thread starting up");
 316
 317     pa_thread_mq_install(&u->thread_mq);
 318     pa_rtpoll_install(u->rtpoll);
 319
 320     pa_smoother_set_time_offset(u->smoother, pa_rtclock_usec());
 321
 322     /* Create a chunk of memory that is our encoded silence sample. */
 323     pa_memchunk_reset(&silence);
 324
 325     for (;;) {
 326         int ret;
 327
 328         if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
 329             if (u->sink->thread_info.rewind_requested)
 330                 pa_sink_process_rewind(u->sink, 0);
 331
 332         if (u->rtpoll_item) {
 333             struct pollfd *pollfd;
 334             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
 335
 336             /* Render some data and write it to the fifo */
 337             if (/*PA_SINK_IS_OPENED(u->sink->thread_info.state) && */pollfd->revents) {
 338                 pa_usec_t usec;
 339                 int64_t n;
 340                 void *p;
 341
 342                 if (!silence.memblock) {
 343                     pa_memchunk silence_tmp;
 344
 345                     pa_memchunk_reset(&silence_tmp);
 346                     silence_tmp.memblock = pa_memblock_new(u->core->mempool, 4096);
 347                     silence_tmp.length = 4096;
 348                     p = pa_memblock_acquire(silence_tmp.memblock);
 349                       memset(p, 0, 4096);
 350                     pa_memblock_release(silence_tmp.memblock);
 351                     pa_raop_client_encode_sample(u->raop, &silence_tmp, &silence);
 352                     pa_assert(0 == silence_tmp.length);
 353                     silence_overhead = silence_tmp.length - 4096;
 354                     silence_ratio = silence_tmp.length / 4096;
 355                     pa_memblock_unref(silence_tmp.memblock);
 356                 }
 357
 358                 for (;;) {
 359                     ssize_t l;
 360
 361                     if (u->encoded_memchunk.length <= 0) {
 362                         if (u->encoded_memchunk.memblock)
 363                             pa_memblock_unref(u->encoded_memchunk.memblock);
 364                         if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
 365                             size_t rl;
 366
 367                             /* We render real data */
 368                             if (u->raw_memchunk.length <= 0) {
 369                                 if (u->raw_memchunk.memblock)
 370                                     pa_memblock_unref(u->raw_memchunk.memblock);
 371                                 pa_memchunk_reset(&u->raw_memchunk);
 372
 373                                 /* Grab unencoded data */
 374                                 pa_sink_render(u->sink, u->block_size, &u->raw_memchunk);
 375                             }
 376                             pa_assert(u->raw_memchunk.length > 0);
 377
 378                             /* Encode it */
 379                             rl = u->raw_memchunk.length;
 380                             u->encoding_overhead += u->next_encoding_overhead;
 381                             pa_raop_client_encode_sample(u->raop, &u->raw_memchunk, &u->encoded_memchunk);
 382                             u->next_encoding_overhead = (u->encoded_memchunk.length - (rl - u->raw_memchunk.length));
 383                             u->encoding_ratio = u->encoded_memchunk.length / (rl - u->raw_memchunk.length);
 384                         } else {
 385                             /* We render some silence into our memchunk */
 386                             memcpy(&u->encoded_memchunk, &silence, sizeof(pa_memchunk));
 387                             pa_memblock_ref(silence.memblock);
 388
 389                             /* Calculate/store some values to be used with the smoother */
 390                             u->next_encoding_overhead = silence_overhead;
 391                             u->encoding_ratio = silence_ratio;
 392                         }
 393                     }
 394                     pa_assert(u->encoded_memchunk.length > 0);
 395
 396                     p = pa_memblock_acquire(u->encoded_memchunk.memblock);
 397                     l = pa_write(u->fd, (uint8_t*) p + u->encoded_memchunk.index, u->encoded_memchunk.length, &write_type);
 398                     pa_memblock_release(u->encoded_memchunk.memblock);
 399
 400                     pa_assert(l != 0);
 401
 402                     if (l < 0) {
 403
 404                         if (errno == EINTR)
 405                             continue;
 406                         else if (errno == EAGAIN) {
 407
 408                             /* OK, we filled all socket buffers up
 409                              * now. */
 410                             goto filled_up;
 411
 412                         } else {
 413                             pa_log("Failed to write data to FIFO: %s", pa_cstrerror(errno));
 414                             goto fail;
 415                         }
 416
 417                     } else {
 418                         u->offset += l;
 419
 420                         u->encoded_memchunk.index += l;
 421                         u->encoded_memchunk.length -= l;
 422
 423                         pollfd->revents = 0;
 424
 425                         if (u->encoded_memchunk.length > 0) {
 426                             /* we've completely written the encoded data, so update our overhead */
 427                             u->encoding_overhead += u->next_encoding_overhead;
 428
 429                             /* OK, we wrote less that we asked for,
 430                              * hence we can assume that the socket
 431                              * buffers are full now */
 432                             goto filled_up;
 433                         }
 434                     }
 435                 }
 436
 437             filled_up:
 438
 439                 /* At this spot we know that the socket buffers are
 440                  * fully filled up. This is the best time to estimate
 441                  * the playback position of the server */
 442
 443                 n = u->offset - u->encoding_overhead;
 444
 445 #ifdef SIOCOUTQ
 446                 {
 447                     int l;
 448                     if (ioctl(u->fd, SIOCOUTQ, &l) >= 0 && l > 0)
 449                         n -= (l / u->encoding_ratio);
 450                 }
 451 #endif
 452
 453                 usec = pa_bytes_to_usec(n, &u->sink->sample_spec);
 454
 455                 if (usec > u->latency)
 456                     usec -= u->latency;
 457                 else
 458                     usec = 0;
 459
 460                 pa_smoother_put(u->smoother, pa_rtclock_usec(), usec);
 461             }
 462
 463             /* Hmm, nothing to do. Let's sleep */
 464             pollfd->events = POLLOUT; /*PA_SINK_IS_OPENED(u->sink->thread_info.state)  ? POLLOUT : 0;*/
 465         }
 466
 467         if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
 468             goto fail;
 469
 470         if (ret == 0)
 471             goto finish;
 472
 473         if (u->rtpoll_item) {
 474             struct pollfd* pollfd;
 475
 476             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
 477
 478             if (pollfd->revents & ~POLLOUT) {
 479                 if (u->sink->thread_info.state != PA_SINK_SUSPENDED) {
 480                     pa_log("FIFO shutdown.");
 481                     goto fail;
 482                 }
 483
 484                 /* We expect this to happen on occasion if we are not sending data.
 485                    It's perfectly natural and normal and natural */
 486                 if (u->rtpoll_item)
 487                     pa_rtpoll_item_free(u->rtpoll_item);
 488                 u->rtpoll_item = NULL;
 489             }
 490         }
 491     }
 492
 493 fail:
 494     /* If this was no regular exit from the loop we have to continue
 495      * processing messages until we received PA_MESSAGE_SHUTDOWN */
 496     pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
 497     pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
 498
 499 finish:
 500     if (silence.memblock)
 501         pa_memblock_unref(silence.memblock);
 502     pa_log_debug("Thread shutting down");
 503 }
 504
 505 int pa__init(pa_module*m) {
 506     struct userdata *u = NULL;
 507     pa_sample_spec ss;
 508     pa_modargs *ma = NULL;
 509     const char *server;
 510     pa_sink_new_data data;
 511
 512     pa_assert(m);
 513
 514     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 515         pa_log("failed to parse module arguments");
 516         goto fail;
 517     }
 518
 519     ss = m->core->default_sample_spec;
 520     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 521         pa_log("invalid sample format specification");
 522         goto fail;
 523     }
 524
 525     if ((/*ss.format != PA_SAMPLE_U8 &&*/ ss.format != PA_SAMPLE_S16NE) ||
 526         (ss.channels > 2)) {
 527         pa_log("sample type support is limited to mono/stereo and U8 or S16NE sample data");
 528         goto fail;
 529     }
 530
 531     u = pa_xnew0(struct userdata, 1);
 532     u->core = m->core;
 533     u->module = m;
 534     m->userdata = u;
 535     u->fd = -1;
 536     u->smoother = pa_smoother_new(PA_USEC_PER_SEC, PA_USEC_PER_SEC*2, TRUE, 10);
 537     pa_memchunk_reset(&u->raw_memchunk);
 538     pa_memchunk_reset(&u->encoded_memchunk);
 539     u->offset = 0;
 540     u->encoding_overhead = 0;
 541     u->next_encoding_overhead = 0;
 542     u->encoding_ratio = 1.0;
 543
 544     u->volume = roundf(0.7 * PA_VOLUME_NORM);
 545     u->muted = FALSE;
 546
 547     u->rtpoll = pa_rtpoll_new();
 548     pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
 549     u->rtpoll_item = NULL;
 550
 551     /*u->format =
 552         (ss.format == PA_SAMPLE_U8 ? ESD_BITS8 : ESD_BITS16) |
 553         (ss.channels == 2 ? ESD_STEREO : ESD_MONO);*/
 554     u->rate = ss.rate;
 555     u->block_size = pa_usec_to_bytes(PA_USEC_PER_SEC/20, &ss);
 556
 557     u->read_data = u->write_data = NULL;
 558     u->read_index = u->write_index = u->read_length = u->write_length = 0;
 559
 560     /*u->state = STATE_AUTH;*/
 561     u->latency = 0;
 562
 563     if (!(server = pa_modargs_get_value(ma, "server", NULL))) {
 564         pa_log("No server argument given.");
 565         goto fail;
 566     }
 567
 568     pa_sink_new_data_init(&data);
 569     data.driver = __FILE__;
 570     data.module = m;
 571     pa_sink_new_data_set_name(&data, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
 572     pa_sink_new_data_set_sample_spec(&data, &ss);
 573     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, server);
 574     pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Airtunes sink '%s'", server);
 575
 576     u->sink = pa_sink_new(m->core, &data, PA_SINK_LATENCY|PA_SINK_NETWORK);
 577     pa_sink_new_data_done(&data);
 578
 579     if (!u->sink) {
 580         pa_log("Failed to create sink.");
 581         goto fail;
 582     }
 583
 584     u->sink->parent.process_msg = sink_process_msg;
 585     u->sink->userdata = u;
 586     u->sink->get_volume = sink_get_volume_cb;
 587     u->sink->set_volume = sink_set_volume_cb;
 588     u->sink->get_mute = sink_get_mute_cb;
 589     u->sink->set_mute = sink_set_mute_cb;
 590     u->sink->flags = PA_SINK_LATENCY|PA_SINK_NETWORK|PA_SINK_HW_VOLUME_CTRL;
 591
 592     pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
 593     pa_sink_set_rtpoll(u->sink, u->rtpoll);
 594
 595     if (!(u->raop = pa_raop_client_new(u->core, server))) {
 596         pa_log("Failed to connect to server.");
 597         goto fail;
 598     }
 599
 600     pa_raop_client_set_callback(u->raop, on_connection, u);
 601     pa_raop_client_set_closed_callback(u->raop, on_close, u);
 602
 603     if (!(u->thread = pa_thread_new(thread_func, u))) {
 604         pa_log("Failed to create thread.");
 605         goto fail;
 606     }
 607
 608     pa_sink_put(u->sink);
 609
 610     pa_modargs_free(ma);
 611
 612     return 0;
 613
 614 fail:
 615     if (ma)
 616         pa_modargs_free(ma);
 617
 618     pa__done(m);
 619
 620     return -1;
 621 }
 622
 623 int pa__get_n_used(pa_module *m) {
 624     struct userdata *u;
 625
 626     pa_assert(m);
 627     pa_assert_se(u = m->userdata);
 628
 629     return pa_sink_linked_by(u->sink);
 630 }
 631
 632 void pa__done(pa_module*m) {
 633     struct userdata *u;
 634     pa_assert(m);
 635
 636     if (!(u = m->userdata))
 637         return;
 638
 639     if (u->sink)
 640         pa_sink_unlink(u->sink);
 641
 642     if (u->thread) {
 643         pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
 644         pa_thread_free(u->thread);
 645     }
 646
 647     pa_thread_mq_done(&u->thread_mq);
 648
 649     if (u->sink)
 650         pa_sink_unref(u->sink);
 651
 652     if (u->rtpoll_item)
 653         pa_rtpoll_item_free(u->rtpoll_item);
 654
 655     if (u->rtpoll)
 656         pa_rtpoll_free(u->rtpoll);
 657
 658     if (u->raw_memchunk.memblock)
 659         pa_memblock_unref(u->raw_memchunk.memblock);
 660
 661     if (u->encoded_memchunk.memblock)
 662         pa_memblock_unref(u->encoded_memchunk.memblock);
 663
 664     if (u->raop)
 665         pa_raop_client_free(u->raop);
 666
 667     pa_xfree(u->read_data);
 668     pa_xfree(u->write_data);
 669
 670     if (u->smoother)
 671         pa_smoother_free(u->smoother);
 672
 673     if (u->fd >= 0)
 674         pa_close(u->fd);
 675
 676     pa_xfree(u);
 677 }