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