code.delx.au - pulseaudio/blob - src/pulsecore/sink.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   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 <string.h>
  29 #include <stdio.h>
  30
  31 #include <pulse/introspect.h>
  32 #include <pulse/utf8.h>
  33 #include <pulse/xmalloc.h>
  34 #include <pulse/timeval.h>
  35 #include <pulse/util.h>
  36 #include <pulse/i18n.h>
  37
  38 #include <pulsecore/sink-input.h>
  39 #include <pulsecore/namereg.h>
  40 #include <pulsecore/core-util.h>
  41 #include <pulsecore/sample-util.h>
  42 #include <pulsecore/core-subscribe.h>
  43 #include <pulsecore/log.h>
  44 #include <pulsecore/macro.h>
  45 #include <pulsecore/play-memblockq.h>
  46
  47 #include "sink.h"
  48
  49 #define MAX_MIX_CHANNELS 32
  50 #define MIX_BUFFER_LENGTH (PA_PAGE_SIZE)
  51 #define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
  52
  53 static PA_DEFINE_CHECK_TYPE(pa_sink, pa_msgobject);
  54
  55 static void sink_free(pa_object *s);
  56
  57 pa_sink_new_data* pa_sink_new_data_init(pa_sink_new_data *data) {
  58     pa_assert(data);
  59
  60     memset(data, 0, sizeof(*data));
  61     data->proplist = pa_proplist_new();
  62
  63     return data;
  64 }
  65
  66 void pa_sink_new_data_set_name(pa_sink_new_data *data, const char *name) {
  67     pa_assert(data);
  68
  69     pa_xfree(data->name);
  70     data->name = pa_xstrdup(name);
  71 }
  72
  73 void pa_sink_new_data_set_sample_spec(pa_sink_new_data *data, const pa_sample_spec *spec) {
  74     pa_assert(data);
  75
  76     if ((data->sample_spec_is_set = !!spec))
  77         data->sample_spec = *spec;
  78 }
  79
  80 void pa_sink_new_data_set_channel_map(pa_sink_new_data *data, const pa_channel_map *map) {
  81     pa_assert(data);
  82
  83     if ((data->channel_map_is_set = !!map))
  84         data->channel_map = *map;
  85 }
  86
  87 void pa_sink_new_data_set_volume(pa_sink_new_data *data, const pa_cvolume *volume) {
  88     pa_assert(data);
  89
  90     if ((data->volume_is_set = !!volume))
  91         data->volume = *volume;
  92 }
  93
  94 void pa_sink_new_data_set_muted(pa_sink_new_data *data, pa_bool_t mute) {
  95     pa_assert(data);
  96
  97     data->muted_is_set = TRUE;
  98     data->muted = !!mute;
  99 }
 100
 101 void pa_sink_new_data_done(pa_sink_new_data *data) {
 102     pa_assert(data);
 103
 104     pa_xfree(data->name);
 105     pa_proplist_free(data->proplist);
 106 }
 107
 108 /* Called from main context */
 109 static void reset_callbacks(pa_sink *s) {
 110     pa_assert(s);
 111
 112     s->set_state = NULL;
 113     s->get_volume = NULL;
 114     s->set_volume = NULL;
 115     s->get_mute = NULL;
 116     s->set_mute = NULL;
 117     s->request_rewind = NULL;
 118     s->update_requested_latency = NULL;
 119 }
 120
 121 /* Called from main context */
 122 pa_sink* pa_sink_new(
 123         pa_core *core,
 124         pa_sink_new_data *data,
 125         pa_sink_flags_t flags) {
 126
 127     pa_sink *s;
 128     const char *name;
 129     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 130     pa_source_new_data source_data;
 131     const char *dn;
 132     char *pt;
 133
 134     pa_assert(core);
 135     pa_assert(data);
 136     pa_assert(data->name);
 137
 138     s = pa_msgobject_new(pa_sink);
 139
 140     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SINK, s, data->namereg_fail))) {
 141         pa_xfree(s);
 142         return NULL;
 143     }
 144
 145     pa_sink_new_data_set_name(data, name);
 146
 147     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_NEW], data) < 0) {
 148         pa_xfree(s);
 149         pa_namereg_unregister(core, name);
 150         return NULL;
 151     }
 152
 153     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 154     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 155
 156     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 157
 158     if (!data->channel_map_is_set)
 159         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 160
 161     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 162     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 163
 164     if (!data->volume_is_set)
 165         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 166
 167     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 168     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 169
 170     if (!data->muted_is_set)
 171         data->muted = FALSE;
 172
 173     if (data->card)
 174         pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->card->proplist);
 175
 176     pa_device_init_description(data->proplist);
 177     pa_device_init_icon(data->proplist, TRUE);
 178
 179     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_FIXATE], data) < 0) {
 180         pa_xfree(s);
 181         pa_namereg_unregister(core, name);
 182         return NULL;
 183     }
 184
 185     s->parent.parent.free = sink_free;
 186     s->parent.process_msg = pa_sink_process_msg;
 187
 188     s->core = core;
 189     s->state = PA_SINK_INIT;
 190     s->flags = flags;
 191     s->name = pa_xstrdup(name);
 192     s->proplist = pa_proplist_copy(data->proplist);
 193     s->driver = pa_xstrdup(pa_path_get_filename(data->driver));
 194     s->module = data->module;
 195     s->card = data->card;
 196
 197     s->sample_spec = data->sample_spec;
 198     s->channel_map = data->channel_map;
 199
 200     s->inputs = pa_idxset_new(NULL, NULL);
 201     s->n_corked = 0;
 202
 203     s->virtual_volume = data->volume;
 204     pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
 205     s->base_volume = PA_VOLUME_NORM;
 206     s->n_volume_steps = PA_VOLUME_NORM+1;
 207     s->muted = data->muted;
 208     s->refresh_volume = s->refresh_muted = FALSE;
 209
 210     reset_callbacks(s);
 211     s->userdata = NULL;
 212
 213     s->asyncmsgq = NULL;
 214     s->rtpoll = NULL;
 215
 216     pa_silence_memchunk_get(
 217             &core->silence_cache,
 218             core->mempool,
 219             &s->silence,
 220             &s->sample_spec,
 221             0);
 222
 223     s->thread_info.inputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 224     s->thread_info.soft_volume =  s->soft_volume;
 225     s->thread_info.soft_muted = s->muted;
 226     s->thread_info.state = s->state;
 227     s->thread_info.rewind_nbytes = 0;
 228     s->thread_info.rewind_requested = FALSE;
 229     s->thread_info.max_rewind = 0;
 230     s->thread_info.max_request = 0;
 231     s->thread_info.requested_latency_valid = FALSE;
 232     s->thread_info.requested_latency = 0;
 233     s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
 234     s->thread_info.max_latency = 0;
 235
 236     pa_assert_se(pa_idxset_put(core->sinks, s, &s->index) >= 0);
 237
 238     if (s->card)
 239         pa_assert_se(pa_idxset_put(s->card->sinks, s, NULL) >= 0);
 240
 241     pt = pa_proplist_to_string_sep(s->proplist, "\n    ");
 242     pa_log_info("Created sink %u \"%s\" with sample spec %s and channel map %s\n    %s",
 243                 s->index,
 244                 s->name,
 245                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 246                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map),
 247                 pt);
 248     pa_xfree(pt);
 249
 250     pa_source_new_data_init(&source_data);
 251     pa_source_new_data_set_sample_spec(&source_data, &s->sample_spec);
 252     pa_source_new_data_set_channel_map(&source_data, &s->channel_map);
 253     source_data.name = pa_sprintf_malloc("%s.monitor", name);
 254     source_data.driver = data->driver;
 255     source_data.module = data->module;
 256     source_data.card = data->card;
 257
 258     dn = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 259     pa_proplist_setf(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Monitor of %s", dn ? dn : s->name);
 260     pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_CLASS, "monitor");
 261
 262     s->monitor_source = pa_source_new(core, &source_data, PA_SOURCE_LATENCY);
 263
 264     pa_source_new_data_done(&source_data);
 265
 266     if (!s->monitor_source) {
 267         pa_sink_unlink(s);
 268         pa_sink_unref(s);
 269         return NULL;
 270     }
 271
 272     s->monitor_source->monitor_of = s;
 273
 274     pa_source_set_latency_range(s->monitor_source, s->thread_info.min_latency, s->thread_info.max_latency);
 275     pa_source_set_max_rewind(s->monitor_source, s->thread_info.max_rewind);
 276
 277     return s;
 278 }
 279
 280 /* Called from main context */
 281 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
 282     int ret;
 283     pa_bool_t suspend_change;
 284     pa_sink_state_t original_state;
 285
 286     pa_assert(s);
 287
 288     if (s->state == state)
 289         return 0;
 290
 291     original_state = s->state;
 292
 293     suspend_change =
 294         (original_state == PA_SINK_SUSPENDED && PA_SINK_IS_OPENED(state)) ||
 295         (PA_SINK_IS_OPENED(original_state) && state == PA_SINK_SUSPENDED);
 296
 297     if (s->set_state)
 298         if ((ret = s->set_state(s, state)) < 0)
 299             return ret;
 300
 301     if (s->asyncmsgq)
 302         if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
 303
 304             if (s->set_state)
 305                 s->set_state(s, original_state);
 306
 307             return ret;
 308         }
 309
 310     s->state = state;
 311
 312     if (state != PA_SINK_UNLINKED) { /* if we enter UNLINKED state pa_sink_unlink() will fire the apropriate events */
 313         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_STATE_CHANGED], s);
 314         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 315     }
 316
 317     if (suspend_change) {
 318         pa_sink_input *i;
 319         uint32_t idx;
 320
 321         /* We're suspending or resuming, tell everyone about it */
 322
 323         for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx)))
 324             if (s->state == PA_SINK_SUSPENDED &&
 325                 (i->flags & PA_SINK_INPUT_FAIL_ON_SUSPEND))
 326                 pa_sink_input_kill(i);
 327             else if (i->suspend)
 328                 i->suspend(i, state == PA_SINK_SUSPENDED);
 329     }
 330
 331     return 0;
 332 }
 333
 334 /* Called from main context */
 335 void pa_sink_put(pa_sink* s) {
 336     pa_sink_assert_ref(s);
 337
 338     pa_assert(s->state == PA_SINK_INIT);
 339
 340     /* The following fields must be initialized properly when calling _put() */
 341     pa_assert(s->asyncmsgq);
 342     pa_assert(s->rtpoll);
 343     pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
 344               s->thread_info.min_latency <= s->thread_info.max_latency);
 345
 346     if (!(s->flags & PA_SINK_HW_VOLUME_CTRL)) {
 347         s->flags |= PA_SINK_DECIBEL_VOLUME;
 348
 349         s->thread_info.soft_volume = s->soft_volume;
 350         s->thread_info.soft_muted = s->muted;
 351     }
 352
 353     if (s->flags & PA_SINK_DECIBEL_VOLUME)
 354         s->n_volume_steps = PA_VOLUME_NORM+1;
 355
 356     if (s->core->flat_volumes)
 357         if (s->flags & PA_SINK_DECIBEL_VOLUME)
 358             s->flags |= PA_SINK_FLAT_VOLUME;
 359
 360     pa_assert_se(sink_set_state(s, PA_SINK_IDLE) == 0);
 361
 362     pa_source_put(s->monitor_source);
 363
 364     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 365     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_PUT], s);
 366 }
 367
 368 /* Called from main context */
 369 void pa_sink_unlink(pa_sink* s) {
 370     pa_bool_t linked;
 371     pa_sink_input *i, *j = NULL;
 372
 373     pa_assert(s);
 374
 375     /* Please note that pa_sink_unlink() does more than simply
 376      * reversing pa_sink_put(). It also undoes the registrations
 377      * already done in pa_sink_new()! */
 378
 379     /* All operations here shall be idempotent, i.e. pa_sink_unlink()
 380      * may be called multiple times on the same sink without bad
 381      * effects. */
 382
 383     linked = PA_SINK_IS_LINKED(s->state);
 384
 385     if (linked)
 386         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_UNLINK], s);
 387
 388     if (s->state != PA_SINK_UNLINKED)
 389         pa_namereg_unregister(s->core, s->name);
 390     pa_idxset_remove_by_data(s->core->sinks, s, NULL);
 391
 392     if (s->card)
 393         pa_idxset_remove_by_data(s->card->sinks, s, NULL);
 394
 395     while ((i = pa_idxset_first(s->inputs, NULL))) {
 396         pa_assert(i != j);
 397         pa_sink_input_kill(i);
 398         j = i;
 399     }
 400
 401     if (linked)
 402         sink_set_state(s, PA_SINK_UNLINKED);
 403     else
 404         s->state = PA_SINK_UNLINKED;
 405
 406     reset_callbacks(s);
 407
 408     if (s->monitor_source)
 409         pa_source_unlink(s->monitor_source);
 410
 411     if (linked) {
 412         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 413         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_UNLINK_POST], s);
 414     }
 415 }
 416
 417 /* Called from main context */
 418 static void sink_free(pa_object *o) {
 419     pa_sink *s = PA_SINK(o);
 420     pa_sink_input *i;
 421
 422     pa_assert(s);
 423     pa_assert(pa_sink_refcnt(s) == 0);
 424
 425     if (PA_SINK_IS_LINKED(s->state))
 426         pa_sink_unlink(s);
 427
 428     pa_log_info("Freeing sink %u \"%s\"", s->index, s->name);
 429
 430     if (s->monitor_source) {
 431         pa_source_unref(s->monitor_source);
 432         s->monitor_source = NULL;
 433     }
 434
 435     pa_idxset_free(s->inputs, NULL, NULL);
 436
 437     while ((i = pa_hashmap_steal_first(s->thread_info.inputs)))
 438         pa_sink_input_unref(i);
 439
 440     pa_hashmap_free(s->thread_info.inputs, NULL, NULL);
 441
 442     if (s->silence.memblock)
 443         pa_memblock_unref(s->silence.memblock);
 444
 445     pa_xfree(s->name);
 446     pa_xfree(s->driver);
 447
 448     if (s->proplist)
 449         pa_proplist_free(s->proplist);
 450
 451     pa_xfree(s);
 452 }
 453
 454 /* Called from main context */
 455 void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q) {
 456     pa_sink_assert_ref(s);
 457
 458     s->asyncmsgq = q;
 459
 460     if (s->monitor_source)
 461         pa_source_set_asyncmsgq(s->monitor_source, q);
 462 }
 463
 464 /* Called from main context */
 465 void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p) {
 466     pa_sink_assert_ref(s);
 467
 468     s->rtpoll = p;
 469     if (s->monitor_source)
 470         pa_source_set_rtpoll(s->monitor_source, p);
 471 }
 472
 473 /* Called from main context */
 474 int pa_sink_update_status(pa_sink*s) {
 475     pa_sink_assert_ref(s);
 476     pa_assert(PA_SINK_IS_LINKED(s->state));
 477
 478     if (s->state == PA_SINK_SUSPENDED)
 479         return 0;
 480
 481     return sink_set_state(s, pa_sink_used_by(s) ? PA_SINK_RUNNING : PA_SINK_IDLE);
 482 }
 483
 484 /* Called from main context */
 485 int pa_sink_suspend(pa_sink *s, pa_bool_t suspend) {
 486     pa_sink_assert_ref(s);
 487     pa_assert(PA_SINK_IS_LINKED(s->state));
 488
 489     if (suspend)
 490         return sink_set_state(s, PA_SINK_SUSPENDED);
 491     else
 492         return sink_set_state(s, pa_sink_used_by(s) ? PA_SINK_RUNNING : PA_SINK_IDLE);
 493 }
 494
 495 /* Called from main context */
 496 pa_queue *pa_sink_move_all_start(pa_sink *s) {
 497     pa_queue *q;
 498     pa_sink_input *i, *n;
 499     uint32_t idx;
 500
 501     pa_sink_assert_ref(s);
 502     pa_assert(PA_SINK_IS_LINKED(s->state));
 503
 504     q = pa_queue_new();
 505
 506     for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = n) {
 507         n = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx));
 508
 509         if (pa_sink_input_start_move(i) >= 0)
 510             pa_queue_push(q, pa_sink_input_ref(i));
 511     }
 512
 513     return q;
 514 }
 515
 516 /* Called from main context */
 517 void pa_sink_move_all_finish(pa_sink *s, pa_queue *q, pa_bool_t save) {
 518     pa_sink_input *i;
 519
 520     pa_sink_assert_ref(s);
 521     pa_assert(PA_SINK_IS_LINKED(s->state));
 522     pa_assert(q);
 523
 524     while ((i = PA_SINK_INPUT(pa_queue_pop(q)))) {
 525         if (pa_sink_input_finish_move(i, s, save) < 0)
 526             pa_sink_input_kill(i);
 527
 528         pa_sink_input_unref(i);
 529     }
 530
 531     pa_queue_free(q, NULL, NULL);
 532 }
 533
 534 /* Called from main context */
 535 void pa_sink_move_all_fail(pa_queue *q) {
 536     pa_sink_input *i;
 537     pa_assert(q);
 538
 539     while ((i = PA_SINK_INPUT(pa_queue_pop(q)))) {
 540         if (pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_FAIL], i) == PA_HOOK_OK) {
 541             pa_sink_input_kill(i);
 542             pa_sink_input_unref(i);
 543         }
 544     }
 545
 546     pa_queue_free(q, NULL, NULL);
 547 }
 548
 549 /* Called from IO thread context */
 550 void pa_sink_process_rewind(pa_sink *s, size_t nbytes) {
 551     pa_sink_input *i;
 552     void *state = NULL;
 553     pa_sink_assert_ref(s);
 554     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
 555
 556     /* If nobody requested this and this is actually no real rewind
 557      * then we can short cut this */
 558     if (!s->thread_info.rewind_requested && nbytes <= 0)
 559         return;
 560
 561     s->thread_info.rewind_nbytes = 0;
 562     s->thread_info.rewind_requested = FALSE;
 563
 564     if (s->thread_info.state == PA_SINK_SUSPENDED)
 565         return;
 566
 567     if (nbytes > 0)
 568         pa_log_debug("Processing rewind...");
 569
 570     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL))) {
 571         pa_sink_input_assert_ref(i);
 572         pa_sink_input_process_rewind(i, nbytes);
 573     }
 574
 575     if (nbytes > 0)
 576         if (s->monitor_source && PA_SOURCE_IS_LINKED(s->monitor_source->thread_info.state))
 577             pa_source_process_rewind(s->monitor_source, nbytes);
 578 }
 579
 580 /* Called from IO thread context */
 581 static unsigned fill_mix_info(pa_sink *s, size_t *length, pa_mix_info *info, unsigned maxinfo) {
 582     pa_sink_input *i;
 583     unsigned n = 0;
 584     void *state = NULL;
 585     size_t mixlength = *length;
 586
 587     pa_sink_assert_ref(s);
 588     pa_assert(info);
 589
 590     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)) && maxinfo > 0) {
 591         pa_sink_input_assert_ref(i);
 592
 593         pa_sink_input_peek(i, *length, &info->chunk, &info->volume);
 594
 595         if (mixlength == 0 || info->chunk.length < mixlength)
 596             mixlength = info->chunk.length;
 597
 598         if (pa_memblock_is_silence(info->chunk.memblock)) {
 599             pa_memblock_unref(info->chunk.memblock);
 600             continue;
 601         }
 602
 603         info->userdata = pa_sink_input_ref(i);
 604
 605         pa_assert(info->chunk.memblock);
 606         pa_assert(info->chunk.length > 0);
 607
 608         info++;
 609         n++;
 610         maxinfo--;
 611     }
 612
 613     if (mixlength > 0)
 614         *length = mixlength;
 615
 616     return n;
 617 }
 618
 619 /* Called from IO thread context */
 620 static void inputs_drop(pa_sink *s, pa_mix_info *info, unsigned n, pa_memchunk *result) {
 621     pa_sink_input *i;
 622     void *state = NULL;
 623     unsigned p = 0;
 624     unsigned n_unreffed = 0;
 625
 626     pa_sink_assert_ref(s);
 627     pa_assert(result);
 628     pa_assert(result->memblock);
 629     pa_assert(result->length > 0);
 630
 631     /* We optimize for the case where the order of the inputs has not changed */
 632
 633     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL))) {
 634         unsigned j;
 635         pa_mix_info* m = NULL;
 636
 637         pa_sink_input_assert_ref(i);
 638
 639         /* Let's try to find the matching entry info the pa_mix_info array */
 640         for (j = 0; j < n; j ++) {
 641
 642             if (info[p].userdata == i) {
 643                 m = info + p;
 644                 break;
 645             }
 646
 647             p++;
 648             if (p >= n)
 649                 p = 0;
 650         }
 651
 652         /* Drop read data */
 653         pa_sink_input_drop(i, result->length);
 654
 655         if (s->monitor_source && PA_SOURCE_IS_LINKED(s->monitor_source->thread_info.state)) {
 656
 657             if (pa_hashmap_size(i->thread_info.direct_outputs) > 0) {
 658                 void *ostate = NULL;
 659                 pa_source_output *o;
 660                 pa_memchunk c;
 661
 662                 if (m && m->chunk.memblock) {
 663                     c = m->chunk;
 664                     pa_memblock_ref(c.memblock);
 665                     pa_assert(result->length <= c.length);
 666                     c.length = result->length;
 667
 668                     pa_memchunk_make_writable(&c, 0);
 669                     pa_volume_memchunk(&c, &s->sample_spec, &m->volume);
 670                 } else {
 671                     c = s->silence;
 672                     pa_memblock_ref(c.memblock);
 673                     pa_assert(result->length <= c.length);
 674                     c.length = result->length;
 675                 }
 676
 677                 while ((o = pa_hashmap_iterate(i->thread_info.direct_outputs, &ostate, NULL))) {
 678                     pa_source_output_assert_ref(o);
 679                     pa_assert(o->direct_on_input == i);
 680                     pa_source_post_direct(s->monitor_source, o, &c);
 681                 }
 682
 683                 pa_memblock_unref(c.memblock);
 684             }
 685         }
 686
 687         if (m) {
 688             if (m->chunk.memblock)
 689                 pa_memblock_unref(m->chunk.memblock);
 690                 pa_memchunk_reset(&m->chunk);
 691
 692             pa_sink_input_unref(m->userdata);
 693             m->userdata = NULL;
 694
 695             n_unreffed += 1;
 696         }
 697     }
 698
 699     /* Now drop references to entries that are included in the
 700      * pa_mix_info array but don't exist anymore */
 701
 702     if (n_unreffed < n) {
 703         for (; n > 0; info++, n--) {
 704             if (info->userdata)
 705                 pa_sink_input_unref(info->userdata);
 706             if (info->chunk.memblock)
 707                 pa_memblock_unref(info->chunk.memblock);
 708         }
 709     }
 710
 711     if (s->monitor_source && PA_SOURCE_IS_LINKED(s->monitor_source->thread_info.state))
 712         pa_source_post(s->monitor_source, result);
 713 }
 714
 715 /* Called from IO thread context */
 716 void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result) {
 717     pa_mix_info info[MAX_MIX_CHANNELS];
 718     unsigned n;
 719     size_t block_size_max;
 720
 721     pa_sink_assert_ref(s);
 722     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
 723     pa_assert(pa_frame_aligned(length, &s->sample_spec));
 724     pa_assert(result);
 725
 726     pa_sink_ref(s);
 727
 728     pa_assert(!s->thread_info.rewind_requested);
 729     pa_assert(s->thread_info.rewind_nbytes == 0);
 730
 731     if (s->thread_info.state == PA_SINK_SUSPENDED) {
 732         result->memblock = pa_memblock_ref(s->silence.memblock);
 733         result->index = s->silence.index;
 734         result->length = PA_MIN(s->silence.length, length);
 735         return;
 736     }
 737
 738     if (length <= 0)
 739         length = pa_frame_align(MIX_BUFFER_LENGTH, &s->sample_spec);
 740
 741     block_size_max = pa_mempool_block_size_max(s->core->mempool);
 742     if (length > block_size_max)
 743         length = pa_frame_align(block_size_max, &s->sample_spec);
 744
 745     pa_assert(length > 0);
 746
 747     n = fill_mix_info(s, &length, info, MAX_MIX_CHANNELS);
 748
 749     if (n == 0) {
 750
 751         *result = s->silence;
 752         pa_memblock_ref(result->memblock);
 753
 754         if (result->length > length)
 755             result->length = length;
 756
 757     } else if (n == 1) {
 758         pa_cvolume volume;
 759
 760         *result = info[0].chunk;
 761         pa_memblock_ref(result->memblock);
 762
 763         if (result->length > length)
 764             result->length = length;
 765
 766         pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume);
 767
 768         if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&volume)) {
 769             pa_memchunk_make_writable(result, 0);
 770             if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume))
 771                 pa_silence_memchunk(result, &s->sample_spec);
 772             else
 773                 pa_volume_memchunk(result, &s->sample_spec, &volume);
 774         }
 775     } else {
 776         void *ptr;
 777         result->memblock = pa_memblock_new(s->core->mempool, length);
 778
 779         ptr = pa_memblock_acquire(result->memblock);
 780         result->length = pa_mix(info, n,
 781                                 ptr, length,
 782                                 &s->sample_spec,
 783                                 &s->thread_info.soft_volume,
 784                                 s->thread_info.soft_muted);
 785         pa_memblock_release(result->memblock);
 786
 787         result->index = 0;
 788     }
 789
 790     inputs_drop(s, info, n, result);
 791
 792     pa_sink_unref(s);
 793 }
 794
 795 /* Called from IO thread context */
 796 void pa_sink_render_into(pa_sink*s, pa_memchunk *target) {
 797     pa_mix_info info[MAX_MIX_CHANNELS];
 798     unsigned n;
 799     size_t length, block_size_max;
 800
 801     pa_sink_assert_ref(s);
 802     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
 803     pa_assert(target);
 804     pa_assert(target->memblock);
 805     pa_assert(target->length > 0);
 806     pa_assert(pa_frame_aligned(target->length, &s->sample_spec));
 807
 808     pa_sink_ref(s);
 809
 810     pa_assert(!s->thread_info.rewind_requested);
 811     pa_assert(s->thread_info.rewind_nbytes == 0);
 812
 813     if (s->thread_info.state == PA_SINK_SUSPENDED) {
 814         pa_silence_memchunk(target, &s->sample_spec);
 815         return;
 816     }
 817
 818     length = target->length;
 819     block_size_max = pa_mempool_block_size_max(s->core->mempool);
 820     if (length > block_size_max)
 821         length = pa_frame_align(block_size_max, &s->sample_spec);
 822
 823     pa_assert(length > 0);
 824
 825     n = fill_mix_info(s, &length, info, MAX_MIX_CHANNELS);
 826
 827     if (n == 0) {
 828         if (target->length > length)
 829             target->length = length;
 830
 831         pa_silence_memchunk(target, &s->sample_spec);
 832     } else if (n == 1) {
 833         pa_cvolume volume;
 834
 835         if (target->length > length)
 836             target->length = length;
 837
 838         pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume);
 839
 840         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume))
 841             pa_silence_memchunk(target, &s->sample_spec);
 842         else {
 843             pa_memchunk vchunk;
 844
 845             vchunk = info[0].chunk;
 846             pa_memblock_ref(vchunk.memblock);
 847
 848             if (vchunk.length > length)
 849                 vchunk.length = length;
 850
 851             if (!pa_cvolume_is_norm(&volume)) {
 852                 pa_memchunk_make_writable(&vchunk, 0);
 853                 pa_volume_memchunk(&vchunk, &s->sample_spec, &volume);
 854             }
 855
 856             pa_memchunk_memcpy(target, &vchunk);
 857             pa_memblock_unref(vchunk.memblock);
 858         }
 859
 860     } else {
 861         void *ptr;
 862
 863         ptr = pa_memblock_acquire(target->memblock);
 864
 865         target->length = pa_mix(info, n,
 866                                 (uint8_t*) ptr + target->index, length,
 867                                 &s->sample_spec,
 868                                 &s->thread_info.soft_volume,
 869                                 s->thread_info.soft_muted);
 870
 871         pa_memblock_release(target->memblock);
 872     }
 873
 874     inputs_drop(s, info, n, target);
 875
 876     pa_sink_unref(s);
 877 }
 878
 879 /* Called from IO thread context */
 880 void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target) {
 881     pa_memchunk chunk;
 882     size_t l, d;
 883
 884     pa_sink_assert_ref(s);
 885     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
 886     pa_assert(target);
 887     pa_assert(target->memblock);
 888     pa_assert(target->length > 0);
 889     pa_assert(pa_frame_aligned(target->length, &s->sample_spec));
 890
 891     pa_sink_ref(s);
 892
 893     pa_assert(!s->thread_info.rewind_requested);
 894     pa_assert(s->thread_info.rewind_nbytes == 0);
 895
 896     l = target->length;
 897     d = 0;
 898     while (l > 0) {
 899         chunk = *target;
 900         chunk.index += d;
 901         chunk.length -= d;
 902
 903         pa_sink_render_into(s, &chunk);
 904
 905         d += chunk.length;
 906         l -= chunk.length;
 907     }
 908
 909     pa_sink_unref(s);
 910 }
 911
 912 /* Called from IO thread context */
 913 void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
 914     pa_sink_assert_ref(s);
 915     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
 916     pa_assert(length > 0);
 917     pa_assert(pa_frame_aligned(length, &s->sample_spec));
 918     pa_assert(result);
 919
 920     pa_assert(!s->thread_info.rewind_requested);
 921     pa_assert(s->thread_info.rewind_nbytes == 0);
 922
 923     /*** This needs optimization ***/
 924
 925     result->index = 0;
 926     result->length = length;
 927     result->memblock = pa_memblock_new(s->core->mempool, length);
 928
 929     pa_sink_render_into_full(s, result);
 930 }
 931
 932 /* Called from main thread */
 933 pa_usec_t pa_sink_get_latency(pa_sink *s) {
 934     pa_usec_t usec = 0;
 935
 936     pa_sink_assert_ref(s);
 937     pa_assert(PA_SINK_IS_LINKED(s->state));
 938
 939     /* The returned value is supposed to be in the time domain of the sound card! */
 940
 941     if (s->state == PA_SINK_SUSPENDED)
 942         return 0;
 943
 944     if (!(s->flags & PA_SINK_LATENCY))
 945         return 0;
 946
 947     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 948
 949     return usec;
 950 }
 951
 952 /* Called from main thread */
 953 void pa_sink_update_flat_volume(pa_sink *s, pa_cvolume *new_volume) {
 954     pa_sink_input *i;
 955     uint32_t idx;
 956
 957     pa_sink_assert_ref(s);
 958     pa_assert(new_volume);
 959     pa_assert(PA_SINK_IS_LINKED(s->state));
 960     pa_assert(s->flags & PA_SINK_FLAT_VOLUME);
 961
 962     /* This is called whenever a sink input volume changes and we
 963      * might need to fix up the sink volume accordingly. Please note
 964      * that we don't actually update the sinks volume here, we only
 965      * return how it needs to be updated. The caller should then call
 966      * pa_sink_set_flat_volume().*/
 967
 968     if (pa_idxset_isempty(s->inputs)) {
 969         /* In the special case that we have no sink input we leave the
 970          * volume unmodified. */
 971         *new_volume = s->virtual_volume;
 972         return;
 973     }
 974
 975     pa_cvolume_mute(new_volume, s->channel_map.channels);
 976
 977     /* First let's determine the new maximum volume of all inputs
 978      * connected to this sink */
 979     for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx))) {
 980         unsigned c;
 981         pa_cvolume remapped_volume;
 982
 983         remapped_volume = i->virtual_volume;
 984         pa_cvolume_remap(&remapped_volume, &i->channel_map, &s->channel_map);
 985
 986         for (c = 0; c < new_volume->channels; c++)
 987             if (remapped_volume.values[c] > new_volume->values[c])
 988                 new_volume->values[c] = remapped_volume.values[c];
 989     }
 990
 991     /* Then, let's update the soft volumes of all inputs connected
 992      * to this sink */
 993     for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx))) {
 994         pa_cvolume remapped_new_volume;
 995
 996         remapped_new_volume = *new_volume;
 997         pa_cvolume_remap(&remapped_new_volume, &s->channel_map, &i->channel_map);
 998         pa_sw_cvolume_divide(&i->soft_volume, &i->virtual_volume, &remapped_new_volume);
 999         pa_sw_cvolume_multiply(&i->soft_volume, &i->soft_volume, &i->volume_factor);
1000
1001         /* Hooks have the ability to play games with i->soft_volume */
1002         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_INPUT_SET_VOLUME], i);
1003
1004         /* We don't issue PA_SINK_INPUT_MESSAGE_SET_VOLUME because
1005          * we want the update to have atomically with the sink
1006          * volume update, hence we do it within the
1007          * pa_sink_set_flat_volume() call below*/
1008     }
1009 }
1010
1011 /* Called from main thread */
1012 void pa_sink_propagate_flat_volume(pa_sink *s, const pa_cvolume *old_volume) {
1013     pa_sink_input *i;
1014     uint32_t idx;
1015
1016     pa_sink_assert_ref(s);
1017     pa_assert(old_volume);
1018     pa_assert(PA_SINK_IS_LINKED(s->state));
1019     pa_assert(s->flags & PA_SINK_FLAT_VOLUME);
1020
1021     /* This is called whenever the sink volume changes that is not
1022      * caused by a sink input volume change. We need to fix up the
1023      * sink input volumes accordingly */
1024
1025     for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx))) {
1026         pa_cvolume remapped_old_volume, remapped_new_volume, fixed_volume;
1027         unsigned c;
1028
1029         remapped_new_volume = s->virtual_volume;
1030         pa_cvolume_remap(&remapped_new_volume, &s->channel_map, &i->channel_map);
1031
1032         remapped_old_volume = *old_volume;
1033         pa_cvolume_remap(&remapped_old_volume, &s->channel_map, &i->channel_map);
1034
1035         for (c = 0; c < i->sample_spec.channels; c++)
1036
1037             if (remapped_old_volume.values[c] == PA_VOLUME_MUTED)
1038                 fixed_volume.values[c] = PA_VOLUME_MUTED;
1039             else
1040                 fixed_volume.values[c] = (pa_volume_t)
1041                     ((uint64_t) i->virtual_volume.values[c] *
1042                      (uint64_t) remapped_new_volume.values[c] /
1043                      (uint64_t) remapped_old_volume.values[c]);
1044
1045         fixed_volume.channels = i->virtual_volume.channels;
1046
1047         if (!pa_cvolume_equal(&fixed_volume, &i->virtual_volume)) {
1048             i->virtual_volume = fixed_volume;
1049
1050             /* The virtual volume changed, let's tell people so */
1051             pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
1052         }
1053     }
1054 }
1055
1056 /* Called from main thread */
1057 void pa_sink_set_volume(pa_sink *s, const pa_cvolume *volume, pa_bool_t propagate, pa_bool_t sendmsg) {
1058     pa_cvolume old_virtual_volume;
1059     pa_bool_t virtual_volume_changed;
1060
1061     pa_sink_assert_ref(s);
1062     pa_assert(PA_SINK_IS_LINKED(s->state));
1063     pa_assert(volume);
1064     pa_assert(pa_cvolume_valid(volume));
1065     pa_assert(pa_cvolume_compatible(volume, &s->sample_spec));
1066
1067     old_virtual_volume = s->virtual_volume;
1068     s->virtual_volume = *volume;
1069     virtual_volume_changed = !pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume);
1070
1071     /* Propagate this volume change back to the inputs */
1072     if (virtual_volume_changed)
1073         if (propagate && (s->flags & PA_SINK_FLAT_VOLUME))
1074             pa_sink_propagate_flat_volume(s, &old_virtual_volume);
1075
1076     if (s->set_volume) {
1077         /* If we have a function set_volume(), then we do not apply a
1078          * soft volume by default. However, set_volume() is apply one
1079          * to s->soft_volume */
1080
1081         pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
1082         s->set_volume(s);
1083
1084     } else
1085         /* If we have no function set_volume(), then the soft volume
1086          * becomes the virtual volume */
1087         s->soft_volume = s->virtual_volume;
1088
1089     /* This tells the sink that soft and/or virtual volume changed */
1090     if (sendmsg)
1091         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
1092
1093     if (virtual_volume_changed)
1094         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1095 }
1096
1097 /* Called from main thread. Only to be called by sink implementor */
1098 void pa_sink_set_soft_volume(pa_sink *s, const pa_cvolume *volume) {
1099     pa_sink_assert_ref(s);
1100     pa_assert(volume);
1101
1102     s->soft_volume = *volume;
1103
1104     if (PA_SINK_IS_LINKED(s->state))
1105         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
1106     else
1107         s->thread_info.soft_volume = *volume;
1108 }
1109
1110 /* Called from main thread */
1111 const pa_cvolume *pa_sink_get_volume(pa_sink *s, pa_bool_t force_refresh) {
1112     pa_sink_assert_ref(s);
1113
1114     if (s->refresh_volume || force_refresh) {
1115         struct pa_cvolume old_virtual_volume = s->virtual_volume;
1116
1117         if (s->get_volume)
1118             s->get_volume(s);
1119
1120         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_VOLUME, NULL, 0, NULL) == 0);
1121
1122         if (!pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume)) {
1123
1124             if (s->flags & PA_SINK_FLAT_VOLUME)
1125                 pa_sink_propagate_flat_volume(s, &old_virtual_volume);
1126
1127             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1128         }
1129     }
1130
1131     return &s->virtual_volume;
1132 }
1133
1134 /* Called from main thread */
1135 void pa_sink_set_mute(pa_sink *s, pa_bool_t mute) {
1136     pa_bool_t old_muted;
1137
1138     pa_sink_assert_ref(s);
1139     pa_assert(PA_SINK_IS_LINKED(s->state));
1140
1141     old_muted = s->muted;
1142     s->muted = mute;
1143
1144     if (s->set_mute)
1145         s->set_mute(s);
1146
1147     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
1148
1149     if (old_muted != s->muted)
1150         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1151 }
1152
1153 /* Called from main thread */
1154 pa_bool_t pa_sink_get_mute(pa_sink *s, pa_bool_t force_refresh) {
1155
1156     pa_sink_assert_ref(s);
1157
1158     if (s->refresh_muted || force_refresh) {
1159         pa_bool_t old_muted = s->muted;
1160
1161         if (s->get_mute)
1162             s->get_mute(s);
1163
1164         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MUTE, NULL, 0, NULL) == 0);
1165
1166         if (old_muted != s->muted)
1167             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1168     }
1169
1170     return s->muted;
1171 }
1172
1173 /* Called from main thread */
1174 pa_bool_t pa_sink_update_proplist(pa_sink *s, pa_update_mode_t mode, pa_proplist *p) {
1175
1176     pa_sink_assert_ref(s);
1177     pa_assert(p);
1178
1179     pa_proplist_update(s->proplist, mode, p);
1180
1181     if (PA_SINK_IS_LINKED(s->state)) {
1182         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_PROPLIST_CHANGED], s);
1183         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1184     }
1185
1186     return TRUE;
1187 }
1188
1189 /* Called from main thread */
1190 void pa_sink_set_description(pa_sink *s, const char *description) {
1191     const char *old;
1192     pa_sink_assert_ref(s);
1193
1194     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
1195         return;
1196
1197     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
1198
1199     if (old && description && !strcmp(old, description))
1200         return;
1201
1202     if (description)
1203         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
1204     else
1205         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
1206
1207     if (s->monitor_source) {
1208         char *n;
1209
1210         n = pa_sprintf_malloc("Monitor Source of %s", description ? description : s->name);
1211         pa_source_set_description(s->monitor_source, n);
1212         pa_xfree(n);
1213     }
1214
1215     if (PA_SINK_IS_LINKED(s->state)) {
1216         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1217         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_PROPLIST_CHANGED], s);
1218     }
1219 }
1220
1221 /* Called from main thread */
1222 unsigned pa_sink_linked_by(pa_sink *s) {
1223     unsigned ret;
1224
1225     pa_sink_assert_ref(s);
1226     pa_assert(PA_SINK_IS_LINKED(s->state));
1227
1228     ret = pa_idxset_size(s->inputs);
1229
1230     /* We add in the number of streams connected to us here. Please
1231      * note the asymmmetry to pa_sink_used_by()! */
1232
1233     if (s->monitor_source)
1234         ret += pa_source_linked_by(s->monitor_source);
1235
1236     return ret;
1237 }
1238
1239 /* Called from main thread */
1240 unsigned pa_sink_used_by(pa_sink *s) {
1241     unsigned ret;
1242
1243     pa_sink_assert_ref(s);
1244     pa_assert(PA_SINK_IS_LINKED(s->state));
1245
1246     ret = pa_idxset_size(s->inputs);
1247     pa_assert(ret >= s->n_corked);
1248
1249     /* Streams connected to our monitor source do not matter for
1250      * pa_sink_used_by()!.*/
1251
1252     return ret - s->n_corked;
1253 }
1254
1255 /* Called from main thread */
1256 unsigned pa_sink_check_suspend(pa_sink *s) {
1257     unsigned ret;
1258     pa_sink_input *i;
1259     uint32_t idx;
1260
1261     pa_sink_assert_ref(s);
1262
1263     if (!PA_SINK_IS_LINKED(s->state))
1264         return 0;
1265
1266     ret = 0;
1267
1268     for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx))) {
1269         pa_sink_input_state_t st;
1270
1271         st = pa_sink_input_get_state(i);
1272         pa_assert(PA_SINK_INPUT_IS_LINKED(st));
1273
1274         if (st == PA_SINK_INPUT_CORKED)
1275             continue;
1276
1277         if (i->flags & PA_SINK_INPUT_DONT_INHIBIT_AUTO_SUSPEND)
1278             continue;
1279
1280         ret ++;
1281     }
1282
1283     if (s->monitor_source)
1284         ret += pa_source_check_suspend(s->monitor_source);
1285
1286     return ret;
1287 }
1288
1289 /* Called from the IO thread */
1290 static void sync_input_volumes_within_thread(pa_sink *s) {
1291     pa_sink_input *i;
1292     void *state = NULL;
1293
1294     pa_sink_assert_ref(s);
1295
1296     while ((i = PA_SINK_INPUT(pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))) {
1297         if (pa_cvolume_equal(&i->thread_info.soft_volume, &i->soft_volume))
1298             continue;
1299
1300         i->thread_info.soft_volume = i->soft_volume;
1301         pa_sink_input_request_rewind(i, 0, TRUE, FALSE, FALSE);
1302     }
1303 }
1304
1305 /* Called from IO thread, except when it is not */
1306 int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
1307     pa_sink *s = PA_SINK(o);
1308     pa_sink_assert_ref(s);
1309
1310     switch ((pa_sink_message_t) code) {
1311
1312         case PA_SINK_MESSAGE_ADD_INPUT: {
1313             pa_sink_input *i = PA_SINK_INPUT(userdata);
1314
1315             /* If you change anything here, make sure to change the
1316              * sink input handling a few lines down at
1317              * PA_SINK_MESSAGE_FINISH_MOVE, too. */
1318
1319             pa_hashmap_put(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index), pa_sink_input_ref(i));
1320
1321             /* Since the caller sleeps in pa_sink_input_put(), we can
1322              * safely access data outside of thread_info even though
1323              * it is mutable */
1324
1325             if ((i->thread_info.sync_prev = i->sync_prev)) {
1326                 pa_assert(i->sink == i->thread_info.sync_prev->sink);
1327                 pa_assert(i->sync_prev->sync_next == i);
1328                 i->thread_info.sync_prev->thread_info.sync_next = i;
1329             }
1330
1331             if ((i->thread_info.sync_next = i->sync_next)) {
1332                 pa_assert(i->sink == i->thread_info.sync_next->sink);
1333                 pa_assert(i->sync_next->sync_prev == i);
1334                 i->thread_info.sync_next->thread_info.sync_prev = i;
1335             }
1336
1337             pa_assert(!i->thread_info.attached);
1338             i->thread_info.attached = TRUE;
1339
1340             if (i->attach)
1341                 i->attach(i);
1342
1343             pa_sink_input_set_state_within_thread(i, i->state);
1344
1345             /* The requested latency of the sink input needs to be
1346              * fixed up and then configured on the sink */
1347
1348             if (i->thread_info.requested_sink_latency != (pa_usec_t) -1)
1349                 pa_sink_input_set_requested_latency_within_thread(i, i->thread_info.requested_sink_latency);
1350
1351             pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
1352             pa_sink_input_update_max_request(i, s->thread_info.max_request);
1353
1354             /* We don't rewind here automatically. This is left to the
1355              * sink input implementor because some sink inputs need a
1356              * slow start, i.e. need some time to buffer client
1357              * samples before beginning streaming. */
1358
1359             /* In flat volume mode we need to update the volume as
1360              * well */
1361             return o->process_msg(o, PA_SINK_MESSAGE_SET_VOLUME, NULL, 0, NULL);
1362         }
1363
1364         case PA_SINK_MESSAGE_REMOVE_INPUT: {
1365             pa_sink_input *i = PA_SINK_INPUT(userdata);
1366
1367             /* If you change anything here, make sure to change the
1368              * sink input handling a few lines down at
1369              * PA_SINK_MESSAGE_PREPAPRE_MOVE, too. */
1370
1371             if (i->detach)
1372                 i->detach(i);
1373
1374             pa_sink_input_set_state_within_thread(i, i->state);
1375
1376             pa_assert(i->thread_info.attached);
1377             i->thread_info.attached = FALSE;
1378
1379             /* Since the caller sleeps in pa_sink_input_unlink(),
1380              * we can safely access data outside of thread_info even
1381              * though it is mutable */
1382
1383             pa_assert(!i->sync_prev);
1384             pa_assert(!i->sync_next);
1385
1386             if (i->thread_info.sync_prev) {
1387                 i->thread_info.sync_prev->thread_info.sync_next = i->thread_info.sync_prev->sync_next;
1388                 i->thread_info.sync_prev = NULL;
1389             }
1390
1391             if (i->thread_info.sync_next) {
1392                 i->thread_info.sync_next->thread_info.sync_prev = i->thread_info.sync_next->sync_prev;
1393                 i->thread_info.sync_next = NULL;
1394             }
1395
1396             if (pa_hashmap_remove(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index)))
1397                 pa_sink_input_unref(i);
1398
1399             pa_sink_invalidate_requested_latency(s);
1400             pa_sink_request_rewind(s, (size_t) -1);
1401
1402             /* In flat volume mode we need to update the volume as
1403              * well */
1404             return o->process_msg(o, PA_SINK_MESSAGE_SET_VOLUME, NULL, 0, NULL);
1405         }
1406
1407         case PA_SINK_MESSAGE_START_MOVE: {
1408             pa_sink_input *i = PA_SINK_INPUT(userdata);
1409
1410             /* We don't support moving synchronized streams. */
1411             pa_assert(!i->sync_prev);
1412             pa_assert(!i->sync_next);
1413             pa_assert(!i->thread_info.sync_next);
1414             pa_assert(!i->thread_info.sync_prev);
1415
1416             if (i->thread_info.state != PA_SINK_INPUT_CORKED) {
1417                 pa_usec_t usec = 0;
1418                 size_t sink_nbytes, total_nbytes;
1419
1420                 /* Get the latency of the sink */
1421                 if (!(s->flags & PA_SINK_LATENCY) ||
1422                     PA_MSGOBJECT(s)->process_msg(PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
1423                     usec = 0;
1424
1425                 sink_nbytes = pa_usec_to_bytes(usec, &s->sample_spec);
1426                 total_nbytes = sink_nbytes + pa_memblockq_get_length(i->thread_info.render_memblockq);
1427
1428                 if (total_nbytes > 0) {
1429                     i->thread_info.rewrite_nbytes = i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, total_nbytes) : total_nbytes;
1430                     i->thread_info.rewrite_flush = TRUE;
1431                     pa_sink_input_process_rewind(i, sink_nbytes);
1432                 }
1433             }
1434
1435             if (i->detach)
1436                 i->detach(i);
1437
1438             pa_assert(i->thread_info.attached);
1439             i->thread_info.attached = FALSE;
1440
1441             /* Let's remove the sink input ...*/
1442             if (pa_hashmap_remove(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index)))
1443                 pa_sink_input_unref(i);
1444
1445             pa_sink_invalidate_requested_latency(s);
1446
1447             pa_log_debug("Requesting rewind due to started move");
1448             pa_sink_request_rewind(s, (size_t) -1);
1449
1450             /* In flat volume mode we need to update the volume as
1451              * well */
1452             return o->process_msg(o, PA_SINK_MESSAGE_SET_VOLUME, NULL, 0, NULL);
1453         }
1454
1455         case PA_SINK_MESSAGE_FINISH_MOVE: {
1456             pa_sink_input *i = PA_SINK_INPUT(userdata);
1457
1458             /* We don't support moving synchronized streams. */
1459             pa_assert(!i->sync_prev);
1460             pa_assert(!i->sync_next);
1461             pa_assert(!i->thread_info.sync_next);
1462             pa_assert(!i->thread_info.sync_prev);
1463
1464             pa_hashmap_put(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index), pa_sink_input_ref(i));
1465
1466             pa_assert(!i->thread_info.attached);
1467             i->thread_info.attached = TRUE;
1468
1469             if (i->attach)
1470                 i->attach(i);
1471
1472             if (i->thread_info.requested_sink_latency != (pa_usec_t) -1)
1473                 pa_sink_input_set_requested_latency_within_thread(i, i->thread_info.requested_sink_latency);
1474
1475             pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
1476             pa_sink_input_update_max_request(i, s->thread_info.max_request);
1477
1478             if (i->thread_info.state != PA_SINK_INPUT_CORKED) {
1479                 pa_usec_t usec = 0;
1480                 size_t nbytes;
1481
1482                 /* Get the latency of the sink */
1483                 if (!(s->flags & PA_SINK_LATENCY) ||
1484                     PA_MSGOBJECT(s)->process_msg(PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
1485                     usec = 0;
1486
1487                 nbytes = pa_usec_to_bytes(usec, &s->sample_spec);
1488
1489                 if (nbytes > 0)
1490                     pa_sink_input_drop(i, nbytes);
1491
1492                 pa_log_debug("Requesting rewind due to finished move");
1493                 pa_sink_request_rewind(s, nbytes);
1494             }
1495
1496             /* In flat volume mode we need to update the volume as
1497              * well */
1498             return o->process_msg(o, PA_SINK_MESSAGE_SET_VOLUME, NULL, 0, NULL);
1499         }
1500
1501         case PA_SINK_MESSAGE_SET_VOLUME:
1502
1503             if (!pa_cvolume_equal(&s->thread_info.soft_volume, &s->soft_volume)) {
1504                 s->thread_info.soft_volume = s->soft_volume;
1505                 pa_sink_request_rewind(s, (size_t) -1);
1506             }
1507
1508             if (s->flags & PA_SINK_FLAT_VOLUME)
1509                 sync_input_volumes_within_thread(s);
1510
1511             return 0;
1512
1513         case PA_SINK_MESSAGE_GET_VOLUME:
1514             return 0;
1515
1516         case PA_SINK_MESSAGE_SET_MUTE:
1517
1518             if (s->thread_info.soft_muted != s->muted) {
1519                 s->thread_info.soft_muted = s->muted;
1520                 pa_sink_request_rewind(s, (size_t) -1);
1521             }
1522
1523             return 0;
1524
1525         case PA_SINK_MESSAGE_GET_MUTE:
1526             return 0;
1527
1528         case PA_SINK_MESSAGE_SET_STATE:
1529
1530             s->thread_info.state = PA_PTR_TO_UINT(userdata);
1531
1532             if (s->thread_info.state == PA_SINK_SUSPENDED)
1533                 s->thread_info.rewind_requested = FALSE;
1534
1535             return 0;
1536
1537         case PA_SINK_MESSAGE_DETACH:
1538
1539             /* Detach all streams */
1540             pa_sink_detach_within_thread(s);
1541             return 0;
1542
1543         case PA_SINK_MESSAGE_ATTACH:
1544
1545             /* Reattach all streams */
1546             pa_sink_attach_within_thread(s);
1547             return 0;
1548
1549         case PA_SINK_MESSAGE_GET_REQUESTED_LATENCY: {
1550
1551             pa_usec_t *usec = userdata;
1552             *usec = pa_sink_get_requested_latency_within_thread(s);
1553
1554             if (*usec == (pa_usec_t) -1)
1555                 *usec = s->thread_info.max_latency;
1556
1557             return 0;
1558         }
1559
1560         case PA_SINK_MESSAGE_SET_LATENCY_RANGE: {
1561             pa_usec_t *r = userdata;
1562
1563             pa_sink_update_latency_range(s, r[0], r[1]);
1564
1565             return 0;
1566         }
1567
1568         case PA_SINK_MESSAGE_GET_LATENCY_RANGE: {
1569             pa_usec_t *r = userdata;
1570
1571             r[0] = s->thread_info.min_latency;
1572             r[1] = s->thread_info.max_latency;
1573
1574             return 0;
1575         }
1576
1577         case PA_SINK_MESSAGE_GET_MAX_REWIND:
1578
1579             *((size_t*) userdata) = s->thread_info.max_rewind;
1580             return 0;
1581
1582         case PA_SINK_MESSAGE_GET_MAX_REQUEST:
1583
1584             *((size_t*) userdata) = s->thread_info.max_request;
1585             return 0;
1586
1587         case PA_SINK_MESSAGE_GET_LATENCY:
1588         case PA_SINK_MESSAGE_MAX:
1589             ;
1590     }
1591
1592     return -1;
1593 }
1594
1595 /* Called from main thread */
1596 int pa_sink_suspend_all(pa_core *c, pa_bool_t suspend) {
1597     pa_sink *sink;
1598     uint32_t idx;
1599     int ret = 0;
1600
1601     pa_core_assert_ref(c);
1602
1603     for (sink = PA_SINK(pa_idxset_first(c->sinks, &idx)); sink; sink = PA_SINK(pa_idxset_next(c->sinks, &idx)))
1604         ret -= pa_sink_suspend(sink, suspend) < 0;
1605
1606     return ret;
1607 }
1608
1609 /* Called from main thread */
1610 void pa_sink_detach(pa_sink *s) {
1611     pa_sink_assert_ref(s);
1612     pa_assert(PA_SINK_IS_LINKED(s->state));
1613
1614     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_DETACH, NULL, 0, NULL) == 0);
1615 }
1616
1617 /* Called from main thread */
1618 void pa_sink_attach(pa_sink *s) {
1619     pa_sink_assert_ref(s);
1620     pa_assert(PA_SINK_IS_LINKED(s->state));
1621
1622     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
1623 }
1624
1625 /* Called from IO thread */
1626 void pa_sink_detach_within_thread(pa_sink *s) {
1627     pa_sink_input *i;
1628     void *state = NULL;
1629
1630     pa_sink_assert_ref(s);
1631     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
1632
1633     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
1634         if (i->detach)
1635             i->detach(i);
1636
1637     if (s->monitor_source)
1638         pa_source_detach_within_thread(s->monitor_source);
1639 }
1640
1641 /* Called from IO thread */
1642 void pa_sink_attach_within_thread(pa_sink *s) {
1643     pa_sink_input *i;
1644     void *state = NULL;
1645
1646     pa_sink_assert_ref(s);
1647     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
1648
1649     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
1650         if (i->attach)
1651             i->attach(i);
1652
1653     if (s->monitor_source)
1654         pa_source_attach_within_thread(s->monitor_source);
1655 }
1656
1657 /* Called from IO thread */
1658 void pa_sink_request_rewind(pa_sink*s, size_t nbytes) {
1659     pa_sink_assert_ref(s);
1660     pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
1661
1662     if (s->thread_info.state == PA_SINK_SUSPENDED)
1663         return;
1664
1665     if (nbytes == (size_t) -1)
1666         nbytes = s->thread_info.max_rewind;
1667
1668     nbytes = PA_MIN(nbytes, s->thread_info.max_rewind);
1669
1670     if (s->thread_info.rewind_requested &&
1671         nbytes <= s->thread_info.rewind_nbytes)
1672         return;
1673
1674     s->thread_info.rewind_nbytes = nbytes;
1675     s->thread_info.rewind_requested = TRUE;
1676
1677     if (s->request_rewind)
1678         s->request_rewind(s);
1679 }
1680
1681 /* Called from IO thread */
1682 pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s) {
1683     pa_usec_t result = (pa_usec_t) -1;
1684     pa_sink_input *i;
1685     void *state = NULL;
1686     pa_usec_t monitor_latency;
1687
1688     pa_sink_assert_ref(s);
1689
1690     if (s->thread_info.requested_latency_valid)
1691         return s->thread_info.requested_latency;
1692
1693     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
1694
1695         if (i->thread_info.requested_sink_latency != (pa_usec_t) -1 &&
1696             (result == (pa_usec_t) -1 || result > i->thread_info.requested_sink_latency))
1697             result = i->thread_info.requested_sink_latency;
1698
1699     monitor_latency = pa_source_get_requested_latency_within_thread(s->monitor_source);
1700
1701     if (monitor_latency != (pa_usec_t) -1 &&
1702         (result == (pa_usec_t) -1 || result > monitor_latency))
1703         result = monitor_latency;
1704
1705     if (result != (pa_usec_t) -1) {
1706         if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
1707             result = s->thread_info.max_latency;
1708
1709         if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
1710             result = s->thread_info.min_latency;
1711     }
1712
1713     s->thread_info.requested_latency = result;
1714     s->thread_info.requested_latency_valid = TRUE;
1715
1716     return result;
1717 }
1718
1719 /* Called from main thread */
1720 pa_usec_t pa_sink_get_requested_latency(pa_sink *s) {
1721     pa_usec_t usec = 0;
1722
1723     pa_sink_assert_ref(s);
1724     pa_assert(PA_SINK_IS_LINKED(s->state));
1725
1726     if (s->state == PA_SINK_SUSPENDED)
1727         return 0;
1728
1729     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
1730     return usec;
1731 }
1732
1733 /* Called from IO thread */
1734 void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind) {
1735     pa_sink_input *i;
1736     void *state = NULL;
1737
1738     pa_sink_assert_ref(s);
1739
1740     if (max_rewind == s->thread_info.max_rewind)
1741         return;
1742
1743     s->thread_info.max_rewind = max_rewind;
1744
1745     if (PA_SINK_IS_LINKED(s->thread_info.state)) {
1746         while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
1747             pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
1748     }
1749
1750     if (s->monitor_source)
1751         pa_source_set_max_rewind(s->monitor_source, s->thread_info.max_rewind);
1752 }
1753
1754 /* Called from IO thread */
1755 void pa_sink_set_max_request(pa_sink *s, size_t max_request) {
1756     void *state = NULL;
1757
1758     pa_sink_assert_ref(s);
1759
1760     if (max_request == s->thread_info.max_request)
1761         return;
1762
1763     s->thread_info.max_request = max_request;
1764
1765     if (PA_SINK_IS_LINKED(s->thread_info.state)) {
1766         pa_sink_input *i;
1767
1768         while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
1769             pa_sink_input_update_max_request(i, s->thread_info.max_request);
1770     }
1771 }
1772
1773 /* Called from IO thread */
1774 void pa_sink_invalidate_requested_latency(pa_sink *s) {
1775     pa_sink_input *i;
1776     void *state = NULL;
1777
1778     pa_sink_assert_ref(s);
1779
1780     s->thread_info.requested_latency_valid = FALSE;
1781
1782     if (s->update_requested_latency)
1783         s->update_requested_latency(s);
1784
1785     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
1786         if (i->update_sink_requested_latency)
1787             i->update_sink_requested_latency(i);
1788 }
1789
1790 /* Called from main thread */
1791 void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1792     pa_sink_assert_ref(s);
1793
1794     /* min_latency == 0:           no limit
1795      * min_latency == (size_t) -1: default limit
1796      * min_latency anything else:  specified limit
1797      *
1798      * Similar for max_latency */
1799
1800     if (min_latency == (pa_usec_t) -1)
1801         min_latency = DEFAULT_MIN_LATENCY;
1802
1803     if (max_latency == (pa_usec_t) -1)
1804         max_latency = min_latency;
1805
1806     pa_assert(!min_latency || !max_latency ||
1807               min_latency <= max_latency);
1808
1809     if (PA_SINK_IS_LINKED(s->state)) {
1810         pa_usec_t r[2];
1811
1812         r[0] = min_latency;
1813         r[1] = max_latency;
1814
1815         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
1816     } else {
1817         s->thread_info.min_latency = min_latency;
1818         s->thread_info.max_latency = max_latency;
1819
1820         s->monitor_source->thread_info.min_latency = min_latency;
1821         s->monitor_source->thread_info.max_latency = max_latency;
1822
1823         s->thread_info.requested_latency_valid = s->monitor_source->thread_info.requested_latency_valid = FALSE;
1824     }
1825 }
1826
1827 /* Called from main thread */
1828 void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
1829    pa_sink_assert_ref(s);
1830    pa_assert(min_latency);
1831    pa_assert(max_latency);
1832
1833    if (PA_SINK_IS_LINKED(s->state)) {
1834        pa_usec_t r[2] = { 0, 0 };
1835
1836        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
1837
1838        *min_latency = r[0];
1839        *max_latency = r[1];
1840    } else {
1841        *min_latency = s->thread_info.min_latency;
1842        *max_latency = s->thread_info.max_latency;
1843    }
1844 }
1845
1846 /* Called from IO thread */
1847 void pa_sink_update_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1848     pa_sink_input *i;
1849     void *state = NULL;
1850
1851     pa_sink_assert_ref(s);
1852
1853     pa_assert(!min_latency || !max_latency ||
1854               min_latency <= max_latency);
1855
1856     s->thread_info.min_latency = min_latency;
1857     s->thread_info.max_latency = max_latency;
1858
1859     while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
1860         if (i->update_sink_latency_range)
1861             i->update_sink_latency_range(i);
1862
1863     pa_sink_invalidate_requested_latency(s);
1864
1865     pa_source_update_latency_range(s->monitor_source, min_latency, max_latency);
1866 }
1867
1868 /* Called from main context */
1869 size_t pa_sink_get_max_rewind(pa_sink *s) {
1870     size_t r;
1871     pa_sink_assert_ref(s);
1872
1873     if (!PA_SINK_IS_LINKED(s->state))
1874         return s->thread_info.max_rewind;
1875
1876     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
1877
1878     return r;
1879 }
1880
1881 /* Called from main context */
1882 size_t pa_sink_get_max_request(pa_sink *s) {
1883     size_t r;
1884     pa_sink_assert_ref(s);
1885
1886     if (!PA_SINK_IS_LINKED(s->state))
1887         return s->thread_info.max_request;
1888
1889     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MAX_REQUEST, &r, 0, NULL) == 0);
1890
1891     return r;
1892 }
1893
1894 /* Called from main context */
1895 pa_bool_t pa_device_init_icon(pa_proplist *p, pa_bool_t is_sink) {
1896     const char *ff, *t = NULL, *s = "", *profile, *bus;
1897
1898     pa_assert(p);
1899
1900     if (pa_proplist_contains(p, PA_PROP_DEVICE_ICON_NAME))
1901         return TRUE;
1902
1903     if ((ff = pa_proplist_gets(p, PA_PROP_DEVICE_FORM_FACTOR))) {
1904
1905         if (pa_streq(ff, "microphone"))
1906             t = "audio-input-microphone";
1907         else if (pa_streq(ff, "webcam"))
1908             t = "camera-web";
1909         else if (pa_streq(ff, "computer"))
1910             t = "computer";
1911         else if (pa_streq(ff, "handset"))
1912             t = "phone";
1913     }
1914
1915     if (!t) {
1916         if (is_sink)
1917             t = "audio-card";
1918         else
1919             t = "audio-input-microphone";
1920     }
1921
1922     if ((profile = pa_proplist_gets(p, PA_PROP_DEVICE_PROFILE_NAME))) {
1923         if (strstr(profile, "analog"))
1924             s = "-analog";
1925         else if (strstr(profile, "iec958"))
1926             s = "-iec958";
1927         else if (strstr(profile, "hdmi"))
1928             s = "-hdmi";
1929     }
1930
1931     bus = pa_proplist_gets(p, PA_PROP_DEVICE_BUS);
1932
1933     pa_proplist_setf(p, PA_PROP_DEVICE_ICON_NAME, "%s%s%s%s", t, pa_strempty(s), bus ? "-" : "", pa_strempty(bus));
1934
1935     return TRUE;
1936 }
1937
1938 pa_bool_t pa_device_init_description(pa_proplist *p) {
1939     const char *s;
1940     pa_assert(p);
1941
1942     if (pa_proplist_contains(p, PA_PROP_DEVICE_DESCRIPTION))
1943         return TRUE;
1944
1945     if ((s = pa_proplist_gets(p, PA_PROP_DEVICE_FORM_FACTOR)))
1946         if (pa_streq(s, "internal")) {
1947             pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, _("Internal Audio"));
1948             return TRUE;
1949         }
1950
1951     if ((s = pa_proplist_gets(p, PA_PROP_DEVICE_PRODUCT_NAME))) {
1952         pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, s);
1953         return TRUE;
1954     }
1955
1956     return FALSE;
1957 }