code.delx.au - pulseaudio/blob - src/modules/module-filter-apply.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2011 Colin Guthrie
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulse/timeval.h>
  27 #include <pulse/rtclock.h>
  28 #include <pulse/xmalloc.h>
  29
  30 #include <pulsecore/core.h>
  31 #include <pulsecore/core-util.h>
  32 #include <pulsecore/i18n.h>
  33 #include <pulsecore/macro.h>
  34 #include <pulsecore/hashmap.h>
  35 #include <pulsecore/hook-list.h>
  36 #include <pulsecore/sink-input.h>
  37 #include <pulsecore/modargs.h>
  38
  39 #include "module-filter-apply-symdef.h"
  40
  41 #define PA_PROP_FILTER_APPLY_MOVING "filter.apply.moving"
  42
  43 PA_MODULE_AUTHOR("Colin Guthrie");
  44 PA_MODULE_DESCRIPTION("Load filter sinks automatically when needed");
  45 PA_MODULE_VERSION(PACKAGE_VERSION);
  46 PA_MODULE_LOAD_ONCE(TRUE);
  47 PA_MODULE_USAGE(_("autoclean=<automatically unload unused filters?>"));
  48
  49 static const char* const valid_modargs[] = {
  50     "autoclean",
  51     NULL
  52 };
  53
  54 #define DEFAULT_AUTOCLEAN TRUE
  55 #define HOUSEKEEPING_INTERVAL (10 * PA_USEC_PER_SEC)
  56
  57 struct filter {
  58     char *name;
  59     uint32_t module_index;
  60     pa_sink *sink;
  61     pa_sink *sink_master;
  62     pa_source *source;
  63     pa_source *source_master;
  64 };
  65
  66 struct userdata {
  67     pa_core *core;
  68     pa_hashmap *filters;
  69     pa_hook_slot
  70         *sink_input_put_slot,
  71         *sink_input_move_finish_slot,
  72         *sink_input_proplist_slot,
  73         *sink_input_unlink_slot,
  74         *sink_unlink_slot,
  75         *source_output_put_slot,
  76         *source_output_move_finish_slot,
  77         *source_output_proplist_slot,
  78         *source_output_unlink_slot,
  79         *source_unlink_slot;
  80     pa_bool_t autoclean;
  81     pa_time_event *housekeeping_time_event;
  82 };
  83
  84 static unsigned filter_hash(const void *p) {
  85     const struct filter *f = p;
  86
  87     if (f->sink_master && !f->source_master)
  88         return (unsigned) (f->sink_master->index + pa_idxset_string_hash_func(f->name));
  89     else if (!f->sink_master && f->source_master)
  90         return (unsigned) ((f->source_master->index << 16) + pa_idxset_string_hash_func(f->name));
  91     else
  92         pa_assert_not_reached();
  93 }
  94
  95 static int filter_compare(const void *a, const void *b) {
  96     const struct filter *fa = a, *fb = b;
  97     int r;
  98
  99     if (fa->sink_master != fb->sink_master || fa->source_master != fb->source_master)
 100         return 1;
 101     if ((r = strcmp(fa->name, fb->name)))
 102         return r;
 103
 104     return 0;
 105 }
 106
 107 static struct filter *filter_new(const char *name, pa_sink *sink, pa_source *source) {
 108     struct filter *f;
 109
 110     pa_assert(sink || source);
 111
 112     f = pa_xnew(struct filter, 1);
 113     f->name = pa_xstrdup(name);
 114     f->sink_master = sink;
 115     f->source_master = source;
 116     f->module_index = PA_INVALID_INDEX;
 117     f->sink = NULL;
 118     f->source = NULL;
 119
 120     return f;
 121 }
 122
 123 static void filter_free(struct filter *f) {
 124     pa_assert(f);
 125
 126     pa_xfree(f->name);
 127     pa_xfree(f);
 128 }
 129
 130 static const char* should_filter(pa_object *o, pa_bool_t is_sink_input) {
 131     const char *apply;
 132     pa_proplist *pl;
 133
 134     if (is_sink_input)
 135         pl = PA_SINK_INPUT(o)->proplist;
 136     else
 137         pl = PA_SOURCE_OUTPUT(o)->proplist;
 138
 139     /* If the stream doesn't what any filter, then let it be. */
 140     if ((apply = pa_proplist_gets(pl, PA_PROP_FILTER_APPLY)) && !pa_streq(apply, "")) {
 141         const char* suppress = pa_proplist_gets(pl, PA_PROP_FILTER_SUPPRESS);
 142
 143         if (!suppress || !pa_streq(suppress, apply))
 144             return apply;
 145     }
 146
 147     return NULL;
 148 }
 149
 150 static pa_bool_t nothing_attached(struct filter *f) {
 151     pa_bool_t no_si = TRUE, no_so = TRUE;
 152
 153     if (f->sink)
 154         no_si = pa_idxset_isempty(f->sink->inputs);
 155     else if (f->source)
 156         no_so = pa_idxset_isempty(f->source->outputs);
 157
 158     return no_si && no_so;
 159 }
 160
 161 static void housekeeping_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *t, void *userdata) {
 162     struct userdata *u = userdata;
 163     struct filter *filter;
 164     void *state;
 165
 166     pa_assert(a);
 167     pa_assert(e);
 168     pa_assert(u);
 169
 170     pa_assert(e == u->housekeeping_time_event);
 171     u->core->mainloop->time_free(u->housekeeping_time_event);
 172     u->housekeeping_time_event = NULL;
 173
 174     PA_HASHMAP_FOREACH(filter, u->filters, state) {
 175         if (nothing_attached(filter)) {
 176             uint32_t idx;
 177
 178             pa_log_debug("Detected filter %s as no longer used. Unloading.", filter->name);
 179             idx = filter->module_index;
 180             pa_hashmap_remove(u->filters, filter);
 181             filter_free(filter);
 182             pa_module_unload_request_by_index(u->core, idx, TRUE);
 183         }
 184     }
 185
 186     pa_log_info("Housekeeping Done.");
 187 }
 188
 189 static void trigger_housekeeping(struct userdata *u) {
 190     pa_assert(u);
 191
 192     if (!u->autoclean)
 193         return;
 194
 195     if (u->housekeeping_time_event)
 196         return;
 197
 198     u->housekeeping_time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + HOUSEKEEPING_INTERVAL, housekeeping_time_callback, u);
 199 }
 200
 201 static int do_move(pa_object *obj, pa_object *parent, pa_bool_t restore, pa_bool_t is_input) {
 202     if (is_input)
 203         return pa_sink_input_move_to(PA_SINK_INPUT(obj), PA_SINK(parent), restore);
 204     else
 205         return pa_source_output_move_to(PA_SOURCE_OUTPUT(obj), PA_SOURCE(parent), restore);
 206 }
 207
 208 static void move_object_for_filter(pa_object *o, struct filter* filter, pa_bool_t restore, pa_bool_t is_sink_input) {
 209     pa_object *parent;
 210     pa_proplist *pl;
 211     const char *name;
 212
 213     pa_assert(o);
 214     pa_assert(filter);
 215
 216     if (is_sink_input) {
 217         pl = PA_SINK_INPUT(o)->proplist;
 218         pa_assert_se(parent = PA_OBJECT(restore ? filter->sink_master : filter->sink));
 219         name = PA_SINK(parent)->name;
 220     } else {
 221         pl = PA_SOURCE_OUTPUT(o)->proplist;
 222         pa_assert_se(parent = PA_OBJECT(restore ? filter->source_master : filter->source));
 223         name = PA_SOURCE(parent)->name;
 224     }
 225
 226     pa_proplist_sets(pl, PA_PROP_FILTER_APPLY_MOVING, "1");
 227
 228     if (do_move(o, parent, FALSE, is_sink_input) < 0)
 229         pa_log_info("Failed to move %s for \"%s\" to <%s>.", is_sink_input ? "sink-input" : "source-output",
 230                     pa_strnull(pa_proplist_gets(pl, PA_PROP_APPLICATION_NAME)), name);
 231     else
 232         pa_log_info("Successfully moved %s for \"%s\" to <%s>.", is_sink_input ? "sink-input" : "source-output",
 233                     pa_strnull(pa_proplist_gets(pl, PA_PROP_APPLICATION_NAME)), name);
 234
 235     pa_proplist_unset(pl, PA_PROP_FILTER_APPLY_MOVING);
 236 }
 237
 238 static void find_filters_for_module(struct userdata *u, pa_module *m, const char *name) {
 239     uint32_t idx;
 240     pa_sink *sink;
 241     pa_source *source;
 242     struct filter *fltr;
 243
 244     PA_IDXSET_FOREACH(sink, u->core->sinks, idx) {
 245         if (sink->module == m) {
 246             pa_assert(sink->input_to_master != NULL);
 247
 248             fltr = filter_new(name, sink->input_to_master->sink, NULL);
 249             fltr->module_index = m->index;
 250             fltr->sink = sink;
 251
 252             pa_hashmap_put(u->filters, fltr, fltr);
 253         }
 254     }
 255
 256     PA_IDXSET_FOREACH(source, u->core->sources, idx) {
 257         if (source->module == m && !source->monitor_of) {
 258             pa_assert(source->output_from_master != NULL);
 259
 260             fltr = filter_new(name, NULL, source->output_from_master->source);
 261             fltr->module_index = m->index;
 262             fltr->source = source;
 263
 264             pa_hashmap_put(u->filters, fltr, fltr);
 265         }
 266     }
 267 }
 268
 269 static pa_bool_t can_unload_module(struct userdata *u, uint32_t idx) {
 270     void *state;
 271     struct filter *filter;
 272
 273     /* Check if any other struct filters point to the same module */
 274     PA_HASHMAP_FOREACH(filter, u->filters, state) {
 275         if (filter->module_index == idx && !nothing_attached(filter))
 276             return FALSE;
 277     }
 278
 279     return TRUE;
 280 }
 281
 282 static pa_hook_result_t process(struct userdata *u, pa_object *o, pa_bool_t is_sink_input) {
 283     const char *want;
 284     pa_bool_t done_something = FALSE;
 285     pa_sink *sink = NULL;
 286     pa_source *source = NULL;
 287     const char *sink_name = NULL, *source_name = NULL;
 288     pa_module *module;
 289
 290     if (is_sink_input) {
 291         sink = PA_SINK_INPUT(o)->sink;
 292         sink_name = sink->name;
 293         module = sink->module;
 294     } else {
 295         source = PA_SOURCE_OUTPUT(o)->source;
 296         source_name = source->name;
 297         module = source->module;
 298     }
 299
 300     /* If there is no sink/source yet, we can't do much */
 301     if ((is_sink_input && !sink) || (!is_sink_input && !source))
 302         return PA_HOOK_OK;
 303
 304     /* If the stream doesn't what any filter, then let it be. */
 305     if ((want = should_filter(o, is_sink_input))) {
 306         char *module_name;
 307         struct filter *fltr, *filter;
 308
 309         /* We need to ensure the SI is playing on a sink of this type
 310          * attached to the sink it's "officially" playing on */
 311
 312         if (!module)
 313             return PA_HOOK_OK;
 314
 315         module_name = pa_sprintf_malloc("module-%s", want);
 316         if (pa_streq(module->name, module_name)) {
 317             pa_log_debug("Stream appears to be playing on an appropriate sink already. Ignoring.");
 318             pa_xfree(module_name);
 319             return PA_HOOK_OK;
 320         }
 321
 322         fltr = filter_new(want, sink, source);
 323
 324         if (!(filter = pa_hashmap_get(u->filters, fltr))) {
 325             char *args;
 326             pa_module *m;
 327
 328             args = pa_sprintf_malloc("autoloaded=1 %s_master=%s", is_sink_input ? "sink" : "source",
 329                     is_sink_input ? sink_name : source_name);
 330             pa_log_debug("Loading %s with arguments '%s'", module_name, args);
 331
 332             if ((m = pa_module_load(u->core, module_name, args))) {
 333                 find_filters_for_module(u, m, want);
 334                 filter = pa_hashmap_get(u->filters, fltr);
 335                 done_something = TRUE;
 336             }
 337             pa_xfree(args);
 338         }
 339
 340         pa_xfree(fltr);
 341
 342         if (!filter) {
 343             pa_log("Unable to load %s for <%s>", module_name, is_sink_input ? sink_name : source_name);
 344             pa_xfree(module_name);
 345             return PA_HOOK_OK;
 346         }
 347         pa_xfree(module_name);
 348
 349         /* We can move the stream now as we know the destination. If this
 350          * isn't true, we will do it later when the sink appears. */
 351         if ((is_sink_input && filter->sink) || (!is_sink_input && filter->source)) {
 352             move_object_for_filter(o, filter, FALSE, is_sink_input);
 353             done_something = TRUE;
 354         }
 355     } else {
 356         void *state;
 357         struct filter *filter = NULL;
 358
 359         /* We do not want to filter... but are we already filtered?
 360          * This can happen if an input's proplist changes */
 361         PA_HASHMAP_FOREACH(filter, u->filters, state) {
 362             if ((is_sink_input && sink == filter->sink) || (!is_sink_input && source == filter->source)) {
 363                 move_object_for_filter(o, filter, TRUE, is_sink_input);
 364                 done_something = TRUE;
 365                 break;
 366             }
 367         }
 368     }
 369
 370     if (done_something)
 371         trigger_housekeeping(u);
 372
 373     return PA_HOOK_OK;
 374 }
 375
 376 static pa_hook_result_t sink_input_put_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
 377     pa_core_assert_ref(core);
 378     pa_sink_input_assert_ref(i);
 379
 380     return process(u, PA_OBJECT(i), TRUE);
 381 }
 382
 383 static pa_hook_result_t sink_input_move_finish_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
 384     pa_core_assert_ref(core);
 385     pa_sink_input_assert_ref(i);
 386
 387     if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_APPLY_MOVING))
 388         return PA_HOOK_OK;
 389
 390     return process(u, PA_OBJECT(i), TRUE);
 391 }
 392
 393 static pa_hook_result_t sink_input_proplist_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
 394     pa_core_assert_ref(core);
 395     pa_sink_input_assert_ref(i);
 396
 397     return process(u, PA_OBJECT(i), TRUE);
 398 }
 399
 400 static pa_hook_result_t sink_input_unlink_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
 401     pa_core_assert_ref(core);
 402     pa_sink_input_assert_ref(i);
 403
 404     pa_assert(u);
 405
 406     if (pa_hashmap_size(u->filters) > 0)
 407         trigger_housekeeping(u);
 408
 409     return PA_HOOK_OK;
 410 }
 411
 412 static pa_hook_result_t sink_unlink_cb(pa_core *core, pa_sink *sink, struct userdata *u) {
 413     void *state;
 414     struct filter *filter = NULL;
 415
 416     pa_core_assert_ref(core);
 417     pa_sink_assert_ref(sink);
 418     pa_assert(u);
 419
 420     /* If either the parent or the sink we've loaded disappears,
 421      * we should remove it from our hashmap */
 422     PA_HASHMAP_FOREACH(filter, u->filters, state) {
 423         if (filter->sink_master == sink || filter->sink == sink) {
 424             uint32_t idx;
 425
 426             /* Attempt to rescue any streams to the parent sink as this is likely
 427              * the best course of action (as opposed to a generic rescue via
 428              * module-rescue-streams */
 429             if (filter->sink == sink) {
 430                 pa_sink_input *i;
 431
 432                 PA_IDXSET_FOREACH(i, sink->inputs, idx)
 433                     move_object_for_filter(PA_OBJECT(i), filter, TRUE, TRUE);
 434             }
 435
 436             idx = filter->module_index;
 437             pa_hashmap_remove(u->filters, filter);
 438             filter_free(filter);
 439
 440             if (can_unload_module(u, idx))
 441                 pa_module_unload_request_by_index(u->core, idx, TRUE);
 442         }
 443     }
 444
 445     return PA_HOOK_OK;
 446 }
 447
 448 static pa_hook_result_t source_output_put_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
 449     pa_core_assert_ref(core);
 450     pa_source_output_assert_ref(o);
 451
 452     return process(u, PA_OBJECT(o), FALSE);
 453 }
 454
 455 static pa_hook_result_t source_output_move_finish_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
 456     pa_core_assert_ref(core);
 457     pa_source_output_assert_ref(o);
 458
 459     if (pa_proplist_gets(o->proplist, PA_PROP_FILTER_APPLY_MOVING))
 460         return PA_HOOK_OK;
 461
 462     return process(u, PA_OBJECT(o), FALSE);
 463 }
 464
 465 static pa_hook_result_t source_output_proplist_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
 466     pa_core_assert_ref(core);
 467     pa_source_output_assert_ref(o);
 468
 469     return process(u, PA_OBJECT(o), FALSE);
 470 }
 471
 472 static pa_hook_result_t source_output_unlink_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
 473     pa_core_assert_ref(core);
 474     pa_source_output_assert_ref(o);
 475
 476     pa_assert(u);
 477
 478     if (pa_hashmap_size(u->filters) > 0)
 479         trigger_housekeeping(u);
 480
 481     return PA_HOOK_OK;
 482 }
 483
 484 static pa_hook_result_t source_unlink_cb(pa_core *core, pa_source *source, struct userdata *u) {
 485     void *state;
 486     struct filter *filter = NULL;
 487
 488     pa_core_assert_ref(core);
 489     pa_source_assert_ref(source);
 490     pa_assert(u);
 491
 492     /* If either the parent or the source we've loaded disappears,
 493      * we should remove it from our hashmap */
 494     PA_HASHMAP_FOREACH(filter, u->filters, state) {
 495         if (filter->source_master == source || filter->source == source) {
 496             uint32_t idx;
 497
 498             /* Attempt to rescue any streams to the parent source as this is likely
 499              * the best course of action (as opposed to a generic rescue via
 500              * module-rescue-streams */
 501             if (filter->source == source) {
 502                 pa_source_output *o;
 503
 504                 PA_IDXSET_FOREACH(o, source->outputs, idx)
 505                     move_object_for_filter(PA_OBJECT(o), filter, TRUE, FALSE);
 506             }
 507
 508             idx = filter->module_index;
 509             pa_hashmap_remove(u->filters, filter);
 510             filter_free(filter);
 511
 512             if (can_unload_module(u, idx))
 513                 pa_module_unload_request_by_index(u->core, idx, TRUE);
 514         }
 515     }
 516
 517     return PA_HOOK_OK;
 518 }
 519
 520 int pa__init(pa_module *m) {
 521     pa_modargs *ma = NULL;
 522     struct userdata *u;
 523
 524     pa_assert(m);
 525
 526     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 527         pa_log("Failed to parse module arguments");
 528         goto fail;
 529     }
 530
 531     m->userdata = u = pa_xnew0(struct userdata, 1);
 532
 533     u->core = m->core;
 534
 535     u->autoclean = DEFAULT_AUTOCLEAN;
 536     if (pa_modargs_get_value_boolean(ma, "autoclean", &u->autoclean) < 0) {
 537         pa_log("Failed to parse autoclean value");
 538         goto fail;
 539     }
 540
 541     u->filters = pa_hashmap_new(filter_hash, filter_compare);
 542
 543     u->sink_input_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_put_cb, u);
 544     u->sink_input_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_FINISH], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_move_finish_cb, u);
 545     u->sink_input_proplist_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_proplist_cb, u);
 546     u->sink_input_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_unlink_cb, u);
 547     u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE-1, (pa_hook_cb_t) sink_unlink_cb, u);
 548     u->source_output_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], PA_HOOK_LATE, (pa_hook_cb_t) source_output_put_cb, u);
 549     u->source_output_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FINISH], PA_HOOK_LATE, (pa_hook_cb_t) source_output_move_finish_cb, u);
 550     u->source_output_proplist_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) source_output_proplist_cb, u);
 551     u->source_output_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) source_output_unlink_cb, u);
 552     u->source_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE-1, (pa_hook_cb_t) source_unlink_cb, u);
 553
 554     pa_modargs_free(ma);
 555
 556     return 0;
 557
 558 fail:
 559     pa__done(m);
 560
 561     if (ma)
 562         pa_modargs_free(ma);
 563
 564     return -1;
 565 }
 566
 567 void pa__done(pa_module *m) {
 568     struct userdata* u;
 569
 570     pa_assert(m);
 571
 572     if (!(u = m->userdata))
 573         return;
 574
 575     if (u->sink_input_put_slot)
 576         pa_hook_slot_free(u->sink_input_put_slot);
 577     if (u->sink_input_move_finish_slot)
 578         pa_hook_slot_free(u->sink_input_move_finish_slot);
 579     if (u->sink_input_proplist_slot)
 580         pa_hook_slot_free(u->sink_input_proplist_slot);
 581     if (u->sink_input_unlink_slot)
 582         pa_hook_slot_free(u->sink_input_unlink_slot);
 583     if (u->sink_unlink_slot)
 584         pa_hook_slot_free(u->sink_unlink_slot);
 585     if (u->source_output_put_slot)
 586         pa_hook_slot_free(u->source_output_put_slot);
 587     if (u->source_output_move_finish_slot)
 588         pa_hook_slot_free(u->source_output_move_finish_slot);
 589     if (u->source_output_proplist_slot)
 590         pa_hook_slot_free(u->source_output_proplist_slot);
 591     if (u->source_output_unlink_slot)
 592         pa_hook_slot_free(u->source_output_unlink_slot);
 593     if (u->source_unlink_slot)
 594         pa_hook_slot_free(u->source_unlink_slot);
 595
 596     if (u->housekeeping_time_event)
 597         u->core->mainloop->time_free(u->housekeeping_time_event);
 598
 599     if (u->filters) {
 600         struct filter *f;
 601
 602         while ((f = pa_hashmap_steal_first(u->filters))) {
 603             pa_module_unload_request_by_index(u->core, f->module_index, TRUE);
 604             filter_free(f);
 605         }
 606
 607         pa_hashmap_free(u->filters, NULL, NULL);
 608     }
 609
 610     pa_xfree(u);
 611 }