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