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 pa_source* pa_source_new(
 103         pa_core *core,
 104         pa_source_new_data *data,
 105         pa_source_flags_t flags) {
 106
 107     pa_source *s;
 108     const char *name;
 109     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 110
 111     pa_assert(core);
 112
 113     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0)
 114         return NULL;
 115
 116     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 117     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 118
 119     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 120
 121     if (!data->channel_map_is_set)
 122         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 123
 124     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 125     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 126
 127     if (!data->volume_is_set)
 128         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 129
 130     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 131     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 132
 133     if (!data->muted_is_set)
 134         data->muted = FALSE;
 135
 136     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0)
 137         return NULL;
 138
 139     s = pa_msgobject_new(pa_source);
 140
 141     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
 142         pa_xfree(s);
 143         return NULL;
 144     }
 145
 146     s->parent.parent.free = source_free;
 147     s->parent.process_msg = pa_source_process_msg;
 148
 149     s->core = core;
 150     s->state = PA_SOURCE_INIT;
 151     s->flags = flags;
 152     s->name = pa_xstrdup(name);
 153     s->proplist = pa_proplist_copy(data->proplist);
 154     s->driver = pa_xstrdup(data->driver);
 155     s->module = data->module;
 156
 157     s->sample_spec = data->sample_spec;
 158     s->channel_map = data->channel_map;
 159
 160     s->outputs = pa_idxset_new(NULL, NULL);
 161     s->n_corked = 0;
 162     s->monitor_of = NULL;
 163
 164     s->volume = data->volume;
 165     s->muted = data->muted;
 166     s->refresh_volume = s->refresh_muted = FALSE;
 167
 168     s->min_latency = DEFAULT_MIN_LATENCY;
 169     s->max_latency = s->min_latency;
 170
 171     s->get_latency = NULL;
 172     s->set_volume = NULL;
 173     s->get_volume = NULL;
 174     s->set_mute = NULL;
 175     s->get_mute = NULL;
 176     s->set_state = NULL;
 177     s->update_requested_latency = NULL;
 178     s->userdata = NULL;
 179
 180     s->asyncmsgq = NULL;
 181     s->rtpoll = NULL;
 182
 183     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 184     s->thread_info.soft_volume = s->volume;
 185     s->thread_info.soft_muted = s->muted;
 186     s->thread_info.state = s->state;
 187     s->thread_info.requested_latency_valid = TRUE;
 188     s->thread_info.requested_latency = 0;
 189
 190     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 191
 192     pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s",
 193                 s->index,
 194                 s->name,
 195                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 196                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map));
 197
 198     return s;
 199 }
 200
 201 static int source_set_state(pa_source *s, pa_source_state_t state) {
 202     int ret;
 203     pa_bool_t suspend_change;
 204
 205     pa_assert(s);
 206
 207     if (s->state == state)
 208         return 0;
 209
 210     suspend_change =
 211         (s->state == PA_SOURCE_SUSPENDED && PA_SOURCE_OPENED(state)) ||
 212         (PA_SOURCE_OPENED(s->state) && state == PA_SOURCE_SUSPENDED);
 213
 214     if (s->set_state)
 215         if ((ret = s->set_state(s, state)) < 0)
 216             return -1;
 217
 218     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 219         return -1;
 220
 221     s->state = state;
 222
 223     if (suspend_change) {
 224         pa_source_output *o;
 225         uint32_t idx;
 226
 227         /* We're suspending or resuming, tell everyone about it */
 228
 229         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 230             if (o->suspend)
 231                 o->suspend(o, state == PA_SINK_SUSPENDED);
 232     }
 233
 234     if (state != PA_SOURCE_UNLINKED) /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 235         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 236
 237     return 0;
 238 }
 239
 240 void pa_source_put(pa_source *s) {
 241     pa_source_assert_ref(s);
 242
 243     pa_assert(s->state == PA_SINK_INIT);
 244     pa_assert(s->rtpoll);
 245     pa_assert(s->asyncmsgq);
 246
 247     pa_assert(!s->min_latency || !s->max_latency || s->min_latency <= s->max_latency);
 248
 249     if (s->get_volume && s->set_volume)
 250         s->flags |= PA_SOURCE_HW_VOLUME_CTRL;
 251     else {
 252         s->get_volume = NULL;
 253         s->set_volume = NULL;
 254         s->flags = (s->flags & ~PA_SOURCE_HW_VOLUME_CTRL) | PA_SOURCE_DECIBEL_VOLUME;
 255     }
 256
 257     if (s->get_mute && s->set_mute)
 258         s->flags |= PA_SOURCE_HW_MUTE_CTRL;
 259     else {
 260         s->get_mute = NULL;
 261         s->set_mute = NULL;
 262         s->flags &= ~PA_SOURCE_HW_MUTE_CTRL;
 263     }
 264
 265     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 266
 267     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 268     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 269 }
 270
 271 void pa_source_unlink(pa_source *s) {
 272     pa_bool_t linked;
 273     pa_source_output *o, *j = NULL;
 274
 275     pa_assert(s);
 276
 277     /* See pa_sink_unlink() for a couple of comments how this function
 278      * works. */
 279
 280     linked = PA_SOURCE_LINKED(s->state);
 281
 282     if (linked)
 283         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 284
 285     if (s->state != PA_SOURCE_UNLINKED)
 286         pa_namereg_unregister(s->core, s->name);
 287     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 288
 289     while ((o = pa_idxset_first(s->outputs, NULL))) {
 290         pa_assert(o != j);
 291         pa_source_output_kill(o);
 292         j = o;
 293     }
 294
 295     if (linked)
 296         source_set_state(s, PA_SOURCE_UNLINKED);
 297     else
 298         s->state = PA_SOURCE_UNLINKED;
 299
 300     s->get_latency = NULL;
 301     s->get_volume = NULL;
 302     s->set_volume = NULL;
 303     s->set_mute = NULL;
 304     s->get_mute = NULL;
 305     s->set_state = NULL;
 306     s->update_requested_latency = NULL;
 307
 308     if (linked) {
 309         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 310         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 311     }
 312 }
 313
 314 static void source_free(pa_object *o) {
 315     pa_source_output *so;
 316     pa_source *s = PA_SOURCE(o);
 317
 318     pa_assert(s);
 319     pa_assert(pa_source_refcnt(s) == 0);
 320
 321     if (PA_SOURCE_LINKED(s->state))
 322         pa_source_unlink(s);
 323
 324     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 325
 326     pa_idxset_free(s->outputs, NULL, NULL);
 327
 328     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 329         pa_source_output_unref(so);
 330
 331     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 332
 333     pa_xfree(s->name);
 334     pa_xfree(s->driver);
 335
 336     if (s->proplist)
 337         pa_proplist_free(s->proplist);
 338
 339     pa_xfree(s);
 340 }
 341
 342 int pa_source_update_status(pa_source*s) {
 343     pa_source_assert_ref(s);
 344     pa_assert(PA_SOURCE_LINKED(s->state));
 345
 346     if (s->state == PA_SOURCE_SUSPENDED)
 347         return 0;
 348
 349     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 350 }
 351
 352 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 353     pa_source_assert_ref(s);
 354     pa_assert(PA_SOURCE_LINKED(s->state));
 355
 356     if (suspend)
 357         return source_set_state(s, PA_SOURCE_SUSPENDED);
 358     else
 359         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 360 }
 361
 362 void pa_source_ping(pa_source *s) {
 363     pa_source_assert_ref(s);
 364     pa_assert(PA_SOURCE_LINKED(s->state));
 365
 366     pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_PING, NULL, 0, NULL, NULL);
 367 }
 368
 369 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 370     pa_source_output *o;
 371     void *state = NULL;
 372
 373     pa_source_assert_ref(s);
 374     pa_assert(PA_SOURCE_OPENED(s->thread_info.state));
 375     pa_assert(chunk);
 376
 377     if (s->thread_info.state != PA_SOURCE_RUNNING)
 378         return;
 379
 380     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 381         pa_memchunk vchunk = *chunk;
 382
 383         pa_memblock_ref(vchunk.memblock);
 384         pa_memchunk_make_writable(&vchunk, 0);
 385
 386         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 387             pa_silence_memchunk(&vchunk, &s->sample_spec);
 388         else
 389             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 390
 391         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 392             pa_source_output_push(o, &vchunk);
 393
 394         pa_memblock_unref(vchunk.memblock);
 395     } else {
 396
 397         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 398             pa_source_output_push(o, chunk);
 399     }
 400 }
 401
 402 pa_usec_t pa_source_get_latency(pa_source *s) {
 403     pa_usec_t usec;
 404
 405     pa_source_assert_ref(s);
 406     pa_assert(PA_SOURCE_LINKED(s->state));
 407
 408     if (!PA_SOURCE_OPENED(s->state))
 409         return 0;
 410
 411     if (s->get_latency)
 412         return s->get_latency(s);
 413
 414     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
 415         return 0;
 416
 417     return usec;
 418 }
 419
 420 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 421     int changed;
 422
 423     pa_source_assert_ref(s);
 424     pa_assert(PA_SOURCE_LINKED(s->state));
 425     pa_assert(volume);
 426
 427     changed = !pa_cvolume_equal(volume, &s->volume);
 428     s->volume = *volume;
 429
 430     if (s->set_volume && s->set_volume(s) < 0)
 431         s->set_volume = NULL;
 432
 433     if (!s->set_volume)
 434         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
 435
 436     if (changed)
 437         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 438 }
 439
 440 const pa_cvolume *pa_source_get_volume(pa_source *s) {
 441     pa_cvolume old_volume;
 442
 443     pa_source_assert_ref(s);
 444     pa_assert(PA_SOURCE_LINKED(s->state));
 445
 446     old_volume = s->volume;
 447
 448     if (s->get_volume && s->get_volume(s) < 0)
 449         s->get_volume = NULL;
 450
 451     if (!s->get_volume && s->refresh_volume)
 452         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 453
 454     if (!pa_cvolume_equal(&old_volume, &s->volume))
 455         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 456
 457     return &s->volume;
 458 }
 459
 460 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 461     int changed;
 462
 463     pa_source_assert_ref(s);
 464     pa_assert(PA_SOURCE_LINKED(s->state));
 465
 466     changed = s->muted != mute;
 467     s->muted = mute;
 468
 469     if (s->set_mute && s->set_mute(s) < 0)
 470         s->set_mute = NULL;
 471
 472     if (!s->set_mute)
 473         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 474
 475     if (changed)
 476         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 477 }
 478
 479 pa_bool_t pa_source_get_mute(pa_source *s) {
 480     pa_bool_t old_muted;
 481
 482     pa_source_assert_ref(s);
 483     pa_assert(PA_SOURCE_LINKED(s->state));
 484
 485     old_muted = s->muted;
 486
 487     if (s->get_mute && s->get_mute(s) < 0)
 488         s->get_mute = NULL;
 489
 490     if (!s->get_mute && s->refresh_muted)
 491         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 492
 493     if (old_muted != s->muted)
 494         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 495
 496     return s->muted;
 497 }
 498
 499 void pa_source_set_description(pa_source *s, const char *description) {
 500     const char *old;
 501     pa_source_assert_ref(s);
 502
 503     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 504         return;
 505
 506     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 507     if (old && description && !strcmp(old, description))
 508         return;
 509
 510     if (description)
 511         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 512     else
 513         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 514
 515     if (PA_SOURCE_LINKED(s->state)) {
 516         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 517         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 518     }
 519 }
 520
 521 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 522     pa_source_assert_ref(s);
 523     pa_assert(q);
 524
 525     s->asyncmsgq = q;
 526 }
 527
 528 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 529     pa_source_assert_ref(s);
 530     pa_assert(p);
 531
 532     s->rtpoll = p;
 533 }
 534
 535 unsigned pa_source_linked_by(pa_source *s) {
 536     pa_source_assert_ref(s);
 537     pa_assert(PA_SOURCE_LINKED(s->state));
 538
 539     return pa_idxset_size(s->outputs);
 540 }
 541
 542 unsigned pa_source_used_by(pa_source *s) {
 543     unsigned ret;
 544
 545     pa_source_assert_ref(s);
 546     pa_assert(PA_SOURCE_LINKED(s->state));
 547
 548     ret = pa_idxset_size(s->outputs);
 549     pa_assert(ret >= s->n_corked);
 550
 551     return ret - s->n_corked;
 552 }
 553
 554 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 555     pa_source *s = PA_SOURCE(object);
 556     pa_source_assert_ref(s);
 557     pa_assert(s->thread_info.state != PA_SOURCE_UNLINKED);
 558
 559     switch ((pa_source_message_t) code) {
 560         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 561             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 562
 563             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 564
 565             pa_assert(!o->thread_info.attached);
 566             o->thread_info.attached = TRUE;
 567
 568             if (o->attach)
 569                 o->attach(o);
 570
 571             pa_source_invalidate_requested_latency(s);
 572
 573             return 0;
 574         }
 575
 576         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 577             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 578
 579             if (o->detach)
 580                 o->detach(o);
 581
 582             pa_assert(o->thread_info.attached);
 583             o->thread_info.attached = FALSE;
 584
 585             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 586                 pa_source_output_unref(o);
 587
 588             pa_source_invalidate_requested_latency(s);
 589
 590             return 0;
 591         }
 592
 593         case PA_SOURCE_MESSAGE_SET_VOLUME:
 594             s->thread_info.soft_volume = *((pa_cvolume*) userdata);
 595             return 0;
 596
 597         case PA_SOURCE_MESSAGE_SET_MUTE:
 598             s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
 599             return 0;
 600
 601         case PA_SOURCE_MESSAGE_GET_VOLUME:
 602             *((pa_cvolume*) userdata) = s->thread_info.soft_volume;
 603             return 0;
 604
 605         case PA_SOURCE_MESSAGE_GET_MUTE:
 606             *((pa_bool_t*) userdata) = s->thread_info.soft_muted;
 607             return 0;
 608
 609         case PA_SOURCE_MESSAGE_PING:
 610             return 0;
 611
 612         case PA_SOURCE_MESSAGE_SET_STATE:
 613             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 614             return 0;
 615
 616         case PA_SOURCE_MESSAGE_DETACH:
 617
 618             /* We're detaching all our output streams so that the
 619              * asyncmsgq and rtpoll fields can be changed without
 620              * problems */
 621             pa_source_detach_within_thread(s);
 622             return 0;
 623
 624         case PA_SOURCE_MESSAGE_ATTACH:
 625
 626             /* Reattach all streams */
 627             pa_source_attach_within_thread(s);
 628             return 0;
 629
 630         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 631
 632             pa_usec_t *usec = userdata;
 633             *usec = pa_source_get_requested_latency_within_thread(s);
 634             return 0;
 635         }
 636
 637         case PA_SOURCE_MESSAGE_GET_LATENCY:
 638         case PA_SOURCE_MESSAGE_MAX:
 639             ;
 640     }
 641
 642     return -1;
 643 }
 644
 645 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 646     uint32_t idx;
 647     pa_source *source;
 648     int ret = 0;
 649
 650     pa_core_assert_ref(c);
 651
 652     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 653         ret -= pa_source_suspend(source, suspend) < 0;
 654
 655     return ret;
 656 }
 657
 658 void pa_source_detach(pa_source *s) {
 659     pa_source_assert_ref(s);
 660     pa_assert(PA_SOURCE_LINKED(s->state));
 661
 662     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL);
 663 }
 664
 665 void pa_source_attach(pa_source *s) {
 666     pa_source_assert_ref(s);
 667     pa_assert(PA_SOURCE_LINKED(s->state));
 668
 669     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL);
 670 }
 671
 672 void pa_source_detach_within_thread(pa_source *s) {
 673     pa_source_output *o;
 674     void *state = NULL;
 675
 676     pa_source_assert_ref(s);
 677     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 678
 679     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 680         if (o->detach)
 681             o->detach(o);
 682 }
 683
 684 void pa_source_attach_within_thread(pa_source *s) {
 685     pa_source_output *o;
 686     void *state = NULL;
 687
 688     pa_source_assert_ref(s);
 689     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 690
 691     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 692         if (o->attach)
 693             o->attach(o);
 694 }
 695
 696 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
 697     pa_usec_t result = 0;
 698     pa_source_output *o;
 699     void *state = NULL;
 700
 701     pa_source_assert_ref(s);
 702
 703     if (s->thread_info.requested_latency_valid)
 704         return s->thread_info.requested_latency;
 705
 706     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 707
 708         if (o->thread_info.requested_source_latency > 0 &&
 709             (!result || result > o->thread_info.requested_source_latency))
 710             result = o->thread_info.requested_source_latency;
 711
 712     if (result > 0) {
 713         if (s->max_latency > 0 && result > s->max_latency)
 714             result = s->max_latency;
 715
 716         if (s->min_latency > 0 && result < s->min_latency)
 717             result = s->min_latency;
 718     }
 719
 720     s->thread_info.requested_latency = result;
 721     s->thread_info.requested_latency_valid = TRUE;
 722
 723     return result;
 724 }
 725
 726 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
 727     pa_usec_t usec;
 728
 729     pa_source_assert_ref(s);
 730     pa_assert(PA_SOURCE_LINKED(s->state));
 731
 732     if (!PA_SOURCE_OPENED(s->state))
 733         return 0;
 734
 735     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) < 0)
 736         return 0;
 737
 738     return usec;
 739 }
 740
 741 void pa_source_invalidate_requested_latency(pa_source *s) {
 742
 743     pa_source_assert_ref(s);
 744     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 745
 746     if (!s->thread_info.requested_latency_valid)
 747         return;
 748
 749     s->thread_info.requested_latency_valid = FALSE;
 750
 751     if (s->update_requested_latency)
 752         s->update_requested_latency(s);
 753 }