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     /*esd_format_t format;*/
 104     int32_t rate;
 105
 106     pa_smoother *smoother;
 107     int fd;
 108
 109     int64_t offset;
 110     int64_t encoding_overhead;
 111     int32_t next_encoding_overhead;
 112     double encoding_ratio;
 113
 114     pa_raop_client *raop;
 115
 116     size_t block_size;
 117 };
 118
 119 static const char* const valid_modargs[] = {
 120     "server",
 121     "rate",
 122     "format",
 123     "channels",
 124     "sink_name",
 125     NULL
 126 };
 127
 128 enum {
 129     SINK_MESSAGE_PASS_SOCKET = PA_SINK_MESSAGE_MAX,
 130     SINK_MESSAGE_RIP_SOCKET
 131 };
 132
 133 /* Forward declaration */
 134 static void sink_set_volume_cb(pa_sink *);
 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     sink_set_volume_cb(u->sink);
 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             return 0;
 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_set_volume_cb(pa_sink *s) {
 259     struct userdata *u = s->userdata;
 260     pa_cvolume hw;
 261     pa_volume_t v;
 262     char t[PA_CVOLUME_SNPRINT_MAX];
 263
 264     pa_assert(u);
 265
 266     /* If we're muted we don't need to do anything */
 267     if (s->muted)
 268         return;
 269
 270     /* Calculate the max volume of all channels.
 271        We'll use this as our (single) volume on the APEX device and emulate
 272        any variation in channel volumes in software */
 273     v = pa_cvolume_max(&s->virtual_volume);
 274
 275     /* Create a pa_cvolume version of our single value */
 276     pa_cvolume_set(&hw, s->sample_spec.channels, v);
 277
 278     /* Perform any software manipulation of the volume needed */
 279     pa_sw_cvolume_divide(&s->soft_volume, &s->virtual_volume, &hw);
 280
 281     pa_log_debug("Requested volume: %s", pa_cvolume_snprint(t, sizeof(t), &s->virtual_volume));
 282     pa_log_debug("Got hardware volume: %s", pa_cvolume_snprint(t, sizeof(t), &hw));
 283     pa_log_debug("Calculated software volume: %s", pa_cvolume_snprint(t, sizeof(t), &s->soft_volume));
 284
 285     /* Any necessary software volume manipulateion is done so set
 286        our hw volume (or v as a single value) on the device */
 287     pa_raop_client_set_volume(u->raop, v);
 288 }
 289
 290 static void sink_set_mute_cb(pa_sink *s) {
 291     struct userdata *u = s->userdata;
 292
 293     pa_assert(u);
 294
 295     if (s->muted) {
 296         pa_raop_client_set_volume(u->raop, PA_VOLUME_MUTED);
 297     } else {
 298         sink_set_volume_cb(s);
 299     }
 300 }
 301
 302 static void thread_func(void *userdata) {
 303     struct userdata *u = userdata;
 304     int write_type = 0;
 305     pa_memchunk silence;
 306     uint32_t silence_overhead = 0;
 307     double silence_ratio = 0;
 308
 309     pa_assert(u);
 310
 311     pa_log_debug("Thread starting up");
 312
 313     pa_thread_mq_install(&u->thread_mq);
 314     pa_rtpoll_install(u->rtpoll);
 315
 316     pa_smoother_set_time_offset(u->smoother, pa_rtclock_usec());
 317
 318     /* Create a chunk of memory that is our encoded silence sample. */
 319     pa_memchunk_reset(&silence);
 320
 321     for (;;) {
 322         int ret;
 323
 324         if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
 325             if (u->sink->thread_info.rewind_requested)
 326                 pa_sink_process_rewind(u->sink, 0);
 327
 328         if (u->rtpoll_item) {
 329             struct pollfd *pollfd;
 330             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
 331
 332             /* Render some data and write it to the fifo */
 333             if (/*PA_SINK_IS_OPENED(u->sink->thread_info.state) && */pollfd->revents) {
 334                 pa_usec_t usec;
 335                 int64_t n;
 336                 void *p;
 337
 338                 if (!silence.memblock) {
 339                     pa_memchunk silence_tmp;
 340
 341                     pa_memchunk_reset(&silence_tmp);
 342                     silence_tmp.memblock = pa_memblock_new(u->core->mempool, 4096);
 343                     silence_tmp.length = 4096;
 344                     p = pa_memblock_acquire(silence_tmp.memblock);
 345                       memset(p, 0, 4096);
 346                     pa_memblock_release(silence_tmp.memblock);
 347                     pa_raop_client_encode_sample(u->raop, &silence_tmp, &silence);
 348                     pa_assert(0 == silence_tmp.length);
 349                     silence_overhead = silence_tmp.length - 4096;
 350                     silence_ratio = silence_tmp.length / 4096;
 351                     pa_memblock_unref(silence_tmp.memblock);
 352                 }
 353
 354                 for (;;) {
 355                     ssize_t l;
 356
 357                     if (u->encoded_memchunk.length <= 0) {
 358                         if (u->encoded_memchunk.memblock)
 359                             pa_memblock_unref(u->encoded_memchunk.memblock);
 360                         if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
 361                             size_t rl;
 362
 363                             /* We render real data */
 364                             if (u->raw_memchunk.length <= 0) {
 365                                 if (u->raw_memchunk.memblock)
 366                                     pa_memblock_unref(u->raw_memchunk.memblock);
 367                                 pa_memchunk_reset(&u->raw_memchunk);
 368
 369                                 /* Grab unencoded data */
 370                                 pa_sink_render(u->sink, u->block_size, &u->raw_memchunk);
 371                             }
 372                             pa_assert(u->raw_memchunk.length > 0);
 373
 374                             /* Encode it */
 375                             rl = u->raw_memchunk.length;
 376                             u->encoding_overhead += u->next_encoding_overhead;
 377                             pa_raop_client_encode_sample(u->raop, &u->raw_memchunk, &u->encoded_memchunk);
 378                             u->next_encoding_overhead = (u->encoded_memchunk.length - (rl - u->raw_memchunk.length));
 379                             u->encoding_ratio = u->encoded_memchunk.length / (rl - u->raw_memchunk.length);
 380                         } else {
 381                             /* We render some silence into our memchunk */
 382                             memcpy(&u->encoded_memchunk, &silence, sizeof(pa_memchunk));
 383                             pa_memblock_ref(silence.memblock);
 384
 385                             /* Calculate/store some values to be used with the smoother */
 386                             u->next_encoding_overhead = silence_overhead;
 387                             u->encoding_ratio = silence_ratio;
 388                         }
 389                     }
 390                     pa_assert(u->encoded_memchunk.length > 0);
 391
 392                     p = pa_memblock_acquire(u->encoded_memchunk.memblock);
 393                     l = pa_write(u->fd, (uint8_t*) p + u->encoded_memchunk.index, u->encoded_memchunk.length, &write_type);
 394                     pa_memblock_release(u->encoded_memchunk.memblock);
 395
 396                     pa_assert(l != 0);
 397
 398                     if (l < 0) {
 399
 400                         if (errno == EINTR)
 401                             continue;
 402                         else if (errno == EAGAIN) {
 403
 404                             /* OK, we filled all socket buffers up
 405                              * now. */
 406                             goto filled_up;
 407
 408                         } else {
 409                             pa_log("Failed to write data to FIFO: %s", pa_cstrerror(errno));
 410                             goto fail;
 411                         }
 412
 413                     } else {
 414                         u->offset += l;
 415
 416                         u->encoded_memchunk.index += l;
 417                         u->encoded_memchunk.length -= l;
 418
 419                         pollfd->revents = 0;
 420
 421                         if (u->encoded_memchunk.length > 0) {
 422                             /* we've completely written the encoded data, so update our overhead */
 423                             u->encoding_overhead += u->next_encoding_overhead;
 424
 425                             /* OK, we wrote less that we asked for,
 426                              * hence we can assume that the socket
 427                              * buffers are full now */
 428                             goto filled_up;
 429                         }
 430                     }
 431                 }
 432
 433             filled_up:
 434
 435                 /* At this spot we know that the socket buffers are
 436                  * fully filled up. This is the best time to estimate
 437                  * the playback position of the server */
 438
 439                 n = u->offset - u->encoding_overhead;
 440
 441 #ifdef SIOCOUTQ
 442                 {
 443                     int l;
 444                     if (ioctl(u->fd, SIOCOUTQ, &l) >= 0 && l > 0)
 445                         n -= (l / u->encoding_ratio);
 446                 }
 447 #endif
 448
 449                 usec = pa_bytes_to_usec(n, &u->sink->sample_spec);
 450
 451                 if (usec > u->latency)
 452                     usec -= u->latency;
 453                 else
 454                     usec = 0;
 455
 456                 pa_smoother_put(u->smoother, pa_rtclock_usec(), usec);
 457             }
 458
 459             /* Hmm, nothing to do. Let's sleep */
 460             pollfd->events = POLLOUT; /*PA_SINK_IS_OPENED(u->sink->thread_info.state)  ? POLLOUT : 0;*/
 461         }
 462
 463         if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
 464             goto fail;
 465
 466         if (ret == 0)
 467             goto finish;
 468
 469         if (u->rtpoll_item) {
 470             struct pollfd* pollfd;
 471
 472             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
 473
 474             if (pollfd->revents & ~POLLOUT) {
 475                 if (u->sink->thread_info.state != PA_SINK_SUSPENDED) {
 476                     pa_log("FIFO shutdown.");
 477                     goto fail;
 478                 }
 479
 480                 /* We expect this to happen on occasion if we are not sending data.
 481                    It's perfectly natural and normal and natural */
 482                 if (u->rtpoll_item)
 483                     pa_rtpoll_item_free(u->rtpoll_item);
 484                 u->rtpoll_item = NULL;
 485             }
 486         }
 487     }
 488
 489 fail:
 490     /* If this was no regular exit from the loop we have to continue
 491      * processing messages until we received PA_MESSAGE_SHUTDOWN */
 492     pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
 493     pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
 494
 495 finish:
 496     if (silence.memblock)
 497         pa_memblock_unref(silence.memblock);
 498     pa_log_debug("Thread shutting down");
 499 }
 500
 501 int pa__init(pa_module*m) {
 502     struct userdata *u = NULL;
 503     pa_sample_spec ss;
 504     pa_modargs *ma = NULL;
 505     const char *server;
 506     pa_sink_new_data data;
 507
 508     pa_assert(m);
 509
 510     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 511         pa_log("failed to parse module arguments");
 512         goto fail;
 513     }
 514
 515     ss = m->core->default_sample_spec;
 516     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 517         pa_log("invalid sample format specification");
 518         goto fail;
 519     }
 520
 521     if ((/*ss.format != PA_SAMPLE_U8 &&*/ ss.format != PA_SAMPLE_S16NE) ||
 522         (ss.channels > 2)) {
 523         pa_log("sample type support is limited to mono/stereo and U8 or S16NE sample data");
 524         goto fail;
 525     }
 526
 527     u = pa_xnew0(struct userdata, 1);
 528     u->core = m->core;
 529     u->module = m;
 530     m->userdata = u;
 531     u->fd = -1;
 532     u->smoother = pa_smoother_new(PA_USEC_PER_SEC, PA_USEC_PER_SEC*2, TRUE, 10);
 533     pa_memchunk_reset(&u->raw_memchunk);
 534     pa_memchunk_reset(&u->encoded_memchunk);
 535     u->offset = 0;
 536     u->encoding_overhead = 0;
 537     u->next_encoding_overhead = 0;
 538     u->encoding_ratio = 1.0;
 539
 540     u->rtpoll = pa_rtpoll_new();
 541     pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
 542     u->rtpoll_item = NULL;
 543
 544     /*u->format =
 545         (ss.format == PA_SAMPLE_U8 ? ESD_BITS8 : ESD_BITS16) |
 546         (ss.channels == 2 ? ESD_STEREO : ESD_MONO);*/
 547     u->rate = ss.rate;
 548     u->block_size = pa_usec_to_bytes(PA_USEC_PER_SEC/20, &ss);
 549
 550     u->read_data = u->write_data = NULL;
 551     u->read_index = u->write_index = u->read_length = u->write_length = 0;
 552
 553     /*u->state = STATE_AUTH;*/
 554     u->latency = 0;
 555
 556     if (!(server = pa_modargs_get_value(ma, "server", NULL))) {
 557         pa_log("No server argument given.");
 558         goto fail;
 559     }
 560
 561     pa_sink_new_data_init(&data);
 562     data.driver = __FILE__;
 563     data.module = m;
 564     pa_sink_new_data_set_name(&data, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
 565     pa_sink_new_data_set_sample_spec(&data, &ss);
 566     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, server);
 567     pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Airtunes sink '%s'", server);
 568
 569     u->sink = pa_sink_new(m->core, &data, PA_SINK_LATENCY|PA_SINK_NETWORK);
 570     pa_sink_new_data_done(&data);
 571
 572     if (!u->sink) {
 573         pa_log("Failed to create sink.");
 574         goto fail;
 575     }
 576
 577     u->sink->parent.process_msg = sink_process_msg;
 578     u->sink->userdata = u;
 579     u->sink->set_volume = sink_set_volume_cb;
 580     u->sink->set_mute = sink_set_mute_cb;
 581     u->sink->flags = PA_SINK_LATENCY|PA_SINK_NETWORK|PA_SINK_HW_VOLUME_CTRL;
 582
 583     pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
 584     pa_sink_set_rtpoll(u->sink, u->rtpoll);
 585
 586     if (!(u->raop = pa_raop_client_new(u->core, server))) {
 587         pa_log("Failed to connect to server.");
 588         goto fail;
 589     }
 590
 591     pa_raop_client_set_callback(u->raop, on_connection, u);
 592     pa_raop_client_set_closed_callback(u->raop, on_close, u);
 593
 594     if (!(u->thread = pa_thread_new(thread_func, u))) {
 595         pa_log("Failed to create thread.");
 596         goto fail;
 597     }
 598
 599     pa_sink_put(u->sink);
 600
 601     pa_modargs_free(ma);
 602
 603     return 0;
 604
 605 fail:
 606     if (ma)
 607         pa_modargs_free(ma);
 608
 609     pa__done(m);
 610
 611     return -1;
 612 }
 613
 614 int pa__get_n_used(pa_module *m) {
 615     struct userdata *u;
 616
 617     pa_assert(m);
 618     pa_assert_se(u = m->userdata);
 619
 620     return pa_sink_linked_by(u->sink);
 621 }
 622
 623 void pa__done(pa_module*m) {
 624     struct userdata *u;
 625     pa_assert(m);
 626
 627     if (!(u = m->userdata))
 628         return;
 629
 630     if (u->sink)
 631         pa_sink_unlink(u->sink);
 632
 633     if (u->thread) {
 634         pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
 635         pa_thread_free(u->thread);
 636     }
 637
 638     pa_thread_mq_done(&u->thread_mq);
 639
 640     if (u->sink)
 641         pa_sink_unref(u->sink);
 642
 643     if (u->rtpoll_item)
 644         pa_rtpoll_item_free(u->rtpoll_item);
 645
 646     if (u->rtpoll)
 647         pa_rtpoll_free(u->rtpoll);
 648
 649     if (u->raw_memchunk.memblock)
 650         pa_memblock_unref(u->raw_memchunk.memblock);
 651
 652     if (u->encoded_memchunk.memblock)
 653         pa_memblock_unref(u->encoded_memchunk.memblock);
 654
 655     if (u->raop)
 656         pa_raop_client_free(u->raop);
 657
 658     pa_xfree(u->read_data);
 659     pa_xfree(u->write_data);
 660
 661     if (u->smoother)
 662         pa_smoother_free(u->smoother);
 663
 664     if (u->fd >= 0)
 665         pa_close(u->fd);
 666
 667     pa_xfree(u);
 668 }