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