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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as published
  11   by the Free Software Foundation; either version 2 of the License,
  12   or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <pulse/utf8.h>
  34 #include <pulse/xmalloc.h>
  35 #include <pulse/timeval.h>
  36
  37 #include <pulsecore/source-output.h>
  38 #include <pulsecore/namereg.h>
  39 #include <pulsecore/core-subscribe.h>
  40 #include <pulsecore/log.h>
  41 #include <pulsecore/sample-util.h>
  42
  43 #include "source.h"
  44
  45 #define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
  46
  47 static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
  48
  49 static void source_free(pa_object *o);
  50
  51 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
  52     pa_assert(data);
  53
  54     memset(data, 0, sizeof(*data));
  55     data->proplist = pa_proplist_new();
  56
  57     return data;
  58 }
  59
  60 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
  61     pa_assert(data);
  62
  63     pa_xfree(data->name);
  64     data->name = pa_xstrdup(name);
  65 }
  66
  67 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
  68     pa_assert(data);
  69
  70     if ((data->sample_spec_is_set = !!spec))
  71         data->sample_spec = *spec;
  72 }
  73
  74 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
  75     pa_assert(data);
  76
  77     if ((data->channel_map_is_set = !!map))
  78         data->channel_map = *map;
  79 }
  80
  81 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
  82     pa_assert(data);
  83
  84     if ((data->volume_is_set = !!volume))
  85         data->volume = *volume;
  86 }
  87
  88 void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) {
  89     pa_assert(data);
  90
  91     data->muted_is_set = TRUE;
  92     data->muted = !!mute;
  93 }
  94
  95 void pa_source_new_data_done(pa_source_new_data *data) {
  96     pa_assert(data);
  97
  98     pa_xfree(data->name);
  99     pa_proplist_free(data->proplist);
 100 }
 101
 102 static void reset_callbacks(pa_source *s) {
 103     pa_assert(s);
 104
 105     s->set_state = NULL;
 106     s->get_volume = NULL;
 107     s->set_volume = NULL;
 108     s->get_mute = NULL;
 109     s->set_mute = NULL;
 110     s->get_latency = NULL;
 111     s->update_requested_latency = NULL;
 112 }
 113
 114 pa_source* pa_source_new(
 115         pa_core *core,
 116         pa_source_new_data *data,
 117         pa_source_flags_t flags) {
 118
 119     pa_source *s;
 120     const char *name;
 121     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 122
 123     pa_assert(core);
 124
 125     s = pa_msgobject_new(pa_source);
 126
 127     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
 128         pa_xfree(s);
 129         return NULL;
 130     }
 131
 132     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
 133         pa_xfree(s);
 134         pa_namereg_unregister(core, name);
 135         return NULL;
 136     }
 137
 138     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 139     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 140
 141     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 142
 143     if (!data->channel_map_is_set)
 144         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 145
 146     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 147     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 148
 149     if (!data->volume_is_set)
 150         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 151
 152     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 153     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 154
 155     if (!data->muted_is_set)
 156         data->muted = FALSE;
 157
 158     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
 159         pa_xfree(s);
 160         pa_namereg_unregister(core, name);
 161         return NULL;
 162     }
 163
 164     s->parent.parent.free = source_free;
 165     s->parent.process_msg = pa_source_process_msg;
 166
 167     s->core = core;
 168     s->state = PA_SOURCE_INIT;
 169     s->flags = flags;
 170     s->name = pa_xstrdup(name);
 171     s->proplist = pa_proplist_copy(data->proplist);
 172     s->driver = pa_xstrdup(data->driver);
 173     s->module = data->module;
 174
 175     s->sample_spec = data->sample_spec;
 176     s->channel_map = data->channel_map;
 177
 178     s->outputs = pa_idxset_new(NULL, NULL);
 179     s->n_corked = 0;
 180     s->monitor_of = NULL;
 181
 182     s->volume = data->volume;
 183     s->muted = data->muted;
 184     s->refresh_volume = s->refresh_muted = FALSE;
 185
 186     reset_callbacks(s);
 187     s->userdata = NULL;
 188
 189     s->asyncmsgq = NULL;
 190     s->rtpoll = NULL;
 191
 192     pa_silence_memchunk_get(
 193             &core->silence_cache,
 194             core->mempool,
 195             &s->silence,
 196             &s->sample_spec,
 197             0);
 198
 199     s->min_latency = DEFAULT_MIN_LATENCY;
 200     s->max_latency = s->min_latency;
 201
 202     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 203     s->thread_info.soft_volume = s->volume;
 204     s->thread_info.soft_muted = s->muted;
 205     s->thread_info.state = s->state;
 206     s->thread_info.max_rewind = 0;
 207     s->thread_info.requested_latency_valid = TRUE;
 208     s->thread_info.requested_latency = 0;
 209
 210     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 211
 212     pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s",
 213                 s->index,
 214                 s->name,
 215                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 216                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map));
 217
 218     return s;
 219 }
 220
 221 static int source_set_state(pa_source *s, pa_source_state_t state) {
 222     int ret;
 223     pa_bool_t suspend_change;
 224
 225     pa_assert(s);
 226
 227     if (s->state == state)
 228         return 0;
 229
 230     suspend_change =
 231         (s->state == PA_SOURCE_SUSPENDED && PA_SOURCE_OPENED(state)) ||
 232         (PA_SOURCE_OPENED(s->state) && state == PA_SOURCE_SUSPENDED);
 233
 234     if (s->set_state)
 235         if ((ret = s->set_state(s, state)) < 0)
 236             return -1;
 237
 238     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 239         return -1;
 240
 241     s->state = state;
 242
 243     if (suspend_change) {
 244         pa_source_output *o;
 245         uint32_t idx;
 246
 247         /* We're suspending or resuming, tell everyone about it */
 248
 249         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 250             if (o->suspend)
 251                 o->suspend(o, state == PA_SINK_SUSPENDED);
 252     }
 253
 254     if (state != PA_SOURCE_UNLINKED) /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 255         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 256
 257     return 0;
 258 }
 259
 260 void pa_source_put(pa_source *s) {
 261     pa_source_assert_ref(s);
 262
 263     pa_assert(s->state == PA_SINK_INIT);
 264     pa_assert(s->asyncmsgq);
 265     pa_assert(s->rtpoll);
 266
 267     pa_assert(!s->min_latency || !s->max_latency || s->min_latency <= s->max_latency);
 268
 269     if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL))
 270         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 271
 272     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 273
 274     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 275     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 276 }
 277
 278 void pa_source_unlink(pa_source *s) {
 279     pa_bool_t linked;
 280     pa_source_output *o, *j = NULL;
 281
 282     pa_assert(s);
 283
 284     /* See pa_sink_unlink() for a couple of comments how this function
 285      * works. */
 286
 287     linked = PA_SOURCE_LINKED(s->state);
 288
 289     if (linked)
 290         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 291
 292     if (s->state != PA_SOURCE_UNLINKED)
 293         pa_namereg_unregister(s->core, s->name);
 294     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 295
 296     while ((o = pa_idxset_first(s->outputs, NULL))) {
 297         pa_assert(o != j);
 298         pa_source_output_kill(o);
 299         j = o;
 300     }
 301
 302     if (linked)
 303         source_set_state(s, PA_SOURCE_UNLINKED);
 304     else
 305         s->state = PA_SOURCE_UNLINKED;
 306
 307     reset_callbacks(s);
 308
 309     if (linked) {
 310         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 311         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 312     }
 313 }
 314
 315 static void source_free(pa_object *o) {
 316     pa_source_output *so;
 317     pa_source *s = PA_SOURCE(o);
 318
 319     pa_assert(s);
 320     pa_assert(pa_source_refcnt(s) == 0);
 321
 322     if (PA_SOURCE_LINKED(s->state))
 323         pa_source_unlink(s);
 324
 325     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 326
 327     pa_idxset_free(s->outputs, NULL, NULL);
 328
 329     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 330         pa_source_output_unref(so);
 331
 332     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 333
 334     if (s->silence.memblock)
 335         pa_memblock_unref(s->silence.memblock);
 336
 337     pa_xfree(s->name);
 338     pa_xfree(s->driver);
 339
 340     if (s->proplist)
 341         pa_proplist_free(s->proplist);
 342
 343     pa_xfree(s);
 344 }
 345
 346 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 347     pa_source_assert_ref(s);
 348     pa_assert(q);
 349
 350     s->asyncmsgq = q;
 351 }
 352
 353 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 354     pa_source_assert_ref(s);
 355     pa_assert(p);
 356
 357     s->rtpoll = p;
 358 }
 359
 360 int pa_source_update_status(pa_source*s) {
 361     pa_source_assert_ref(s);
 362     pa_assert(PA_SOURCE_LINKED(s->state));
 363
 364     if (s->state == PA_SOURCE_SUSPENDED)
 365         return 0;
 366
 367     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 368 }
 369
 370 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 371     pa_source_assert_ref(s);
 372     pa_assert(PA_SOURCE_LINKED(s->state));
 373
 374     if (suspend)
 375         return source_set_state(s, PA_SOURCE_SUSPENDED);
 376     else
 377         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 378 }
 379
 380 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
 381     pa_source_output *o;
 382     void *state = NULL;
 383
 384     pa_source_assert_ref(s);
 385     pa_assert(PA_SOURCE_OPENED(s->thread_info.state));
 386
 387     if (nbytes <= 0)
 388         return;
 389
 390     pa_log_debug("Processing rewind...");
 391
 392     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 393         pa_source_output_assert_ref(o);
 394         pa_source_output_process_rewind(o, nbytes);
 395     }
 396 }
 397
 398 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 399     pa_source_output *o;
 400     void *state = NULL;
 401
 402     pa_source_assert_ref(s);
 403     pa_assert(PA_SOURCE_OPENED(s->thread_info.state));
 404     pa_assert(chunk);
 405
 406     if (s->thread_info.state != PA_SOURCE_RUNNING)
 407         return;
 408
 409     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 410         pa_memchunk vchunk = *chunk;
 411
 412         pa_memblock_ref(vchunk.memblock);
 413         pa_memchunk_make_writable(&vchunk, 0);
 414
 415         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 416             pa_silence_memchunk(&vchunk, &s->sample_spec);
 417         else
 418             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 419
 420         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 421             pa_source_output_assert_ref(o);
 422             pa_source_output_push(o, &vchunk);
 423         }
 424
 425         pa_memblock_unref(vchunk.memblock);
 426     } else {
 427
 428         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 429             pa_source_output_assert_ref(o);
 430             pa_source_output_push(o, chunk);
 431         }
 432     }
 433 }
 434
 435 pa_usec_t pa_source_get_latency(pa_source *s) {
 436     pa_usec_t usec;
 437
 438     pa_source_assert_ref(s);
 439     pa_assert(PA_SOURCE_LINKED(s->state));
 440
 441     if (!PA_SOURCE_OPENED(s->state))
 442         return 0;
 443
 444     if (s->get_latency)
 445         return s->get_latency(s);
 446
 447     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
 448         return 0;
 449
 450     return usec;
 451 }
 452
 453 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 454     int changed;
 455
 456     pa_source_assert_ref(s);
 457     pa_assert(PA_SOURCE_LINKED(s->state));
 458     pa_assert(volume);
 459
 460     changed = !pa_cvolume_equal(volume, &s->volume);
 461     s->volume = *volume;
 462
 463     if (s->set_volume && s->set_volume(s) < 0)
 464         s->set_volume = NULL;
 465
 466     if (!s->set_volume)
 467         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
 468
 469     if (changed)
 470         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 471 }
 472
 473 const pa_cvolume *pa_source_get_volume(pa_source *s) {
 474     pa_cvolume old_volume;
 475
 476     pa_source_assert_ref(s);
 477     pa_assert(PA_SOURCE_LINKED(s->state));
 478
 479     old_volume = s->volume;
 480
 481     if (s->get_volume && s->get_volume(s) < 0)
 482         s->get_volume = NULL;
 483
 484     if (!s->get_volume && s->refresh_volume)
 485         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 486
 487     if (!pa_cvolume_equal(&old_volume, &s->volume))
 488         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 489
 490     return &s->volume;
 491 }
 492
 493 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 494     int changed;
 495
 496     pa_source_assert_ref(s);
 497     pa_assert(PA_SOURCE_LINKED(s->state));
 498
 499     changed = s->muted != mute;
 500     s->muted = mute;
 501
 502     if (s->set_mute && s->set_mute(s) < 0)
 503         s->set_mute = NULL;
 504
 505     if (!s->set_mute)
 506         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 507
 508     if (changed)
 509         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 510 }
 511
 512 pa_bool_t pa_source_get_mute(pa_source *s) {
 513     pa_bool_t old_muted;
 514
 515     pa_source_assert_ref(s);
 516     pa_assert(PA_SOURCE_LINKED(s->state));
 517
 518     old_muted = s->muted;
 519
 520     if (s->get_mute && s->get_mute(s) < 0)
 521         s->get_mute = NULL;
 522
 523     if (!s->get_mute && s->refresh_muted)
 524         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 525
 526     if (old_muted != s->muted)
 527         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 528
 529     return s->muted;
 530 }
 531
 532 void pa_source_set_description(pa_source *s, const char *description) {
 533     const char *old;
 534     pa_source_assert_ref(s);
 535
 536     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 537         return;
 538
 539     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 540
 541     if (old && description && !strcmp(old, description))
 542         return;
 543
 544     if (description)
 545         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 546     else
 547         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 548
 549     if (PA_SOURCE_LINKED(s->state)) {
 550         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 551         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 552     }
 553 }
 554
 555 unsigned pa_source_linked_by(pa_source *s) {
 556     pa_source_assert_ref(s);
 557     pa_assert(PA_SOURCE_LINKED(s->state));
 558
 559     return pa_idxset_size(s->outputs);
 560 }
 561
 562 unsigned pa_source_used_by(pa_source *s) {
 563     unsigned ret;
 564
 565     pa_source_assert_ref(s);
 566     pa_assert(PA_SOURCE_LINKED(s->state));
 567
 568     ret = pa_idxset_size(s->outputs);
 569     pa_assert(ret >= s->n_corked);
 570
 571     return ret - s->n_corked;
 572 }
 573
 574 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 575     pa_source *s = PA_SOURCE(object);
 576     pa_source_assert_ref(s);
 577     pa_assert(s->thread_info.state != PA_SOURCE_UNLINKED);
 578
 579     switch ((pa_source_message_t) code) {
 580         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 581             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 582
 583             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 584
 585             pa_source_output_set_max_rewind(o, s->thread_info.max_rewind);
 586
 587             pa_assert(!o->thread_info.attached);
 588             o->thread_info.attached = TRUE;
 589
 590             if (o->attach)
 591                 o->attach(o);
 592
 593             pa_source_invalidate_requested_latency(s);
 594
 595             return 0;
 596         }
 597
 598         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 599             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 600
 601             if (o->detach)
 602                 o->detach(o);
 603
 604             pa_assert(o->thread_info.attached);
 605             o->thread_info.attached = FALSE;
 606
 607             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 608                 pa_source_output_unref(o);
 609
 610             pa_source_invalidate_requested_latency(s);
 611
 612             return 0;
 613         }
 614
 615         case PA_SOURCE_MESSAGE_SET_VOLUME:
 616             s->thread_info.soft_volume = *((pa_cvolume*) userdata);
 617             return 0;
 618
 619         case PA_SOURCE_MESSAGE_SET_MUTE:
 620             s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
 621             return 0;
 622
 623         case PA_SOURCE_MESSAGE_GET_VOLUME:
 624             *((pa_cvolume*) userdata) = s->thread_info.soft_volume;
 625             return 0;
 626
 627         case PA_SOURCE_MESSAGE_GET_MUTE:
 628             *((pa_bool_t*) userdata) = s->thread_info.soft_muted;
 629             return 0;
 630
 631         case PA_SOURCE_MESSAGE_SET_STATE:
 632             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 633             return 0;
 634
 635         case PA_SOURCE_MESSAGE_DETACH:
 636
 637             /* We're detaching all our output streams so that the
 638              * asyncmsgq and rtpoll fields can be changed without
 639              * problems */
 640             pa_source_detach_within_thread(s);
 641             return 0;
 642
 643         case PA_SOURCE_MESSAGE_ATTACH:
 644
 645             /* Reattach all streams */
 646             pa_source_attach_within_thread(s);
 647             return 0;
 648
 649         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 650
 651             pa_usec_t *usec = userdata;
 652             *usec = pa_source_get_requested_latency_within_thread(s);
 653             return 0;
 654         }
 655
 656         case PA_SOURCE_MESSAGE_GET_LATENCY:
 657         case PA_SOURCE_MESSAGE_MAX:
 658             ;
 659     }
 660
 661     return -1;
 662 }
 663
 664 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 665     uint32_t idx;
 666     pa_source *source;
 667     int ret = 0;
 668
 669     pa_core_assert_ref(c);
 670
 671     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 672         ret -= pa_source_suspend(source, suspend) < 0;
 673
 674     return ret;
 675 }
 676
 677 void pa_source_detach(pa_source *s) {
 678     pa_source_assert_ref(s);
 679     pa_assert(PA_SOURCE_LINKED(s->state));
 680
 681     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL);
 682 }
 683
 684 void pa_source_attach(pa_source *s) {
 685     pa_source_assert_ref(s);
 686     pa_assert(PA_SOURCE_LINKED(s->state));
 687
 688     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL);
 689 }
 690
 691 void pa_source_detach_within_thread(pa_source *s) {
 692     pa_source_output *o;
 693     void *state = NULL;
 694
 695     pa_source_assert_ref(s);
 696     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 697
 698     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 699         if (o->detach)
 700             o->detach(o);
 701 }
 702
 703 void pa_source_attach_within_thread(pa_source *s) {
 704     pa_source_output *o;
 705     void *state = NULL;
 706
 707     pa_source_assert_ref(s);
 708     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 709
 710     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 711         if (o->attach)
 712             o->attach(o);
 713 }
 714
 715 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
 716     pa_usec_t result = 0;
 717     pa_source_output *o;
 718     void *state = NULL;
 719
 720     pa_source_assert_ref(s);
 721
 722     if (s->thread_info.requested_latency_valid)
 723         return s->thread_info.requested_latency;
 724
 725     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 726
 727         if (o->thread_info.requested_source_latency > 0 &&
 728             (!result || result > o->thread_info.requested_source_latency))
 729             result = o->thread_info.requested_source_latency;
 730
 731     if (result > 0) {
 732         if (s->max_latency > 0 && result > s->max_latency)
 733             result = s->max_latency;
 734
 735         if (s->min_latency > 0 && result < s->min_latency)
 736             result = s->min_latency;
 737     }
 738
 739     s->thread_info.requested_latency = result;
 740     s->thread_info.requested_latency_valid = TRUE;
 741
 742     return result;
 743 }
 744
 745 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
 746     pa_usec_t usec;
 747
 748     pa_source_assert_ref(s);
 749     pa_assert(PA_SOURCE_LINKED(s->state));
 750
 751     if (!PA_SOURCE_OPENED(s->state))
 752         return 0;
 753
 754     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) < 0)
 755         return 0;
 756
 757     return usec;
 758 }
 759
 760 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
 761     pa_source_output *o;
 762     void *state = NULL;
 763
 764     pa_source_assert_ref(s);
 765
 766     if (max_rewind == s->thread_info.max_rewind)
 767         return;
 768
 769     s->thread_info.max_rewind = max_rewind;
 770
 771     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 772         pa_source_output_set_max_rewind(o, s->thread_info.max_rewind);
 773 }
 774
 775 void pa_source_invalidate_requested_latency(pa_source *s) {
 776
 777     pa_source_assert_ref(s);
 778     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 779
 780     if (!s->thread_info.requested_latency_valid)
 781         return;
 782
 783     s->thread_info.requested_latency_valid = FALSE;
 784
 785     if (s->update_requested_latency)
 786         s->update_requested_latency(s);
 787 }