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 = FALSE;
 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_IS_OPENED(state)) ||
 232         (PA_SOURCE_IS_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 (s->asyncmsgq)
 239         if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 240             return -1;
 241
 242     s->state = state;
 243
 244     if (suspend_change) {
 245         pa_source_output *o;
 246         uint32_t idx;
 247
 248         /* We're suspending or resuming, tell everyone about it */
 249
 250         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 251             if (o->suspend)
 252                 o->suspend(o, state == PA_SINK_SUSPENDED);
 253     }
 254
 255     if (state != PA_SOURCE_UNLINKED) /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 256         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 257
 258     return 0;
 259 }
 260
 261 void pa_source_put(pa_source *s) {
 262     pa_source_assert_ref(s);
 263
 264     pa_assert(s->state == PA_SINK_INIT);
 265     pa_assert(s->asyncmsgq);
 266     pa_assert(s->rtpoll);
 267
 268     pa_assert(!s->min_latency || !s->max_latency || s->min_latency <= s->max_latency);
 269
 270     if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL))
 271         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 272
 273     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 274
 275     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 276     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 277 }
 278
 279 void pa_source_unlink(pa_source *s) {
 280     pa_bool_t linked;
 281     pa_source_output *o, *j = NULL;
 282
 283     pa_assert(s);
 284
 285     /* See pa_sink_unlink() for a couple of comments how this function
 286      * works. */
 287
 288     linked = PA_SOURCE_IS_LINKED(s->state);
 289
 290     if (linked)
 291         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 292
 293     if (s->state != PA_SOURCE_UNLINKED)
 294         pa_namereg_unregister(s->core, s->name);
 295     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 296
 297     while ((o = pa_idxset_first(s->outputs, NULL))) {
 298         pa_assert(o != j);
 299         pa_source_output_kill(o);
 300         j = o;
 301     }
 302
 303     if (linked)
 304         source_set_state(s, PA_SOURCE_UNLINKED);
 305     else
 306         s->state = PA_SOURCE_UNLINKED;
 307
 308     reset_callbacks(s);
 309
 310     if (linked) {
 311         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 312         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 313     }
 314 }
 315
 316 static void source_free(pa_object *o) {
 317     pa_source_output *so;
 318     pa_source *s = PA_SOURCE(o);
 319
 320     pa_assert(s);
 321     pa_assert(pa_source_refcnt(s) == 0);
 322
 323     if (PA_SOURCE_IS_LINKED(s->state))
 324         pa_source_unlink(s);
 325
 326     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 327
 328     pa_idxset_free(s->outputs, NULL, NULL);
 329
 330     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 331         pa_source_output_unref(so);
 332
 333     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 334
 335     if (s->silence.memblock)
 336         pa_memblock_unref(s->silence.memblock);
 337
 338     pa_xfree(s->name);
 339     pa_xfree(s->driver);
 340
 341     if (s->proplist)
 342         pa_proplist_free(s->proplist);
 343
 344     pa_xfree(s);
 345 }
 346
 347 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 348     pa_source_assert_ref(s);
 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
 356     s->rtpoll = p;
 357 }
 358
 359 int pa_source_update_status(pa_source*s) {
 360     pa_source_assert_ref(s);
 361     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 362
 363     if (s->state == PA_SOURCE_SUSPENDED)
 364         return 0;
 365
 366     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 367 }
 368
 369 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 370     pa_source_assert_ref(s);
 371     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 372
 373     if (suspend)
 374         return source_set_state(s, PA_SOURCE_SUSPENDED);
 375     else
 376         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 377 }
 378
 379 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
 380     pa_source_output *o;
 381     void *state = NULL;
 382
 383     pa_source_assert_ref(s);
 384     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 385
 386     if (nbytes <= 0)
 387         return;
 388
 389     pa_log_debug("Processing rewind...");
 390
 391     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 392         pa_source_output_assert_ref(o);
 393         pa_source_output_process_rewind(o, nbytes);
 394     }
 395 }
 396
 397 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 398     pa_source_output *o;
 399     void *state = NULL;
 400
 401     pa_source_assert_ref(s);
 402     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 403     pa_assert(chunk);
 404
 405     if (s->thread_info.state != PA_SOURCE_RUNNING)
 406         return;
 407
 408     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 409         pa_memchunk vchunk = *chunk;
 410
 411         pa_memblock_ref(vchunk.memblock);
 412         pa_memchunk_make_writable(&vchunk, 0);
 413
 414         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 415             pa_silence_memchunk(&vchunk, &s->sample_spec);
 416         else
 417             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 418
 419         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 420             pa_source_output_assert_ref(o);
 421             pa_source_output_push(o, &vchunk);
 422         }
 423
 424         pa_memblock_unref(vchunk.memblock);
 425     } else {
 426
 427         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 428             pa_source_output_assert_ref(o);
 429             pa_source_output_push(o, chunk);
 430         }
 431     }
 432 }
 433
 434 pa_usec_t pa_source_get_latency(pa_source *s) {
 435     pa_usec_t usec;
 436
 437     pa_source_assert_ref(s);
 438     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 439
 440     if (!PA_SOURCE_IS_OPENED(s->state))
 441         return 0;
 442
 443     if (s->get_latency)
 444         return s->get_latency(s);
 445
 446     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
 447         return 0;
 448
 449     return usec;
 450 }
 451
 452 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 453     int changed;
 454
 455     pa_source_assert_ref(s);
 456     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 457     pa_assert(volume);
 458
 459     changed = !pa_cvolume_equal(volume, &s->volume);
 460     s->volume = *volume;
 461
 462     if (s->set_volume && s->set_volume(s) < 0)
 463         s->set_volume = NULL;
 464
 465     if (!s->set_volume)
 466         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
 467
 468     if (changed)
 469         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 470 }
 471
 472 const pa_cvolume *pa_source_get_volume(pa_source *s) {
 473     pa_cvolume old_volume;
 474
 475     pa_source_assert_ref(s);
 476     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 477
 478     old_volume = s->volume;
 479
 480     if (s->get_volume && s->get_volume(s) < 0)
 481         s->get_volume = NULL;
 482
 483     if (!s->get_volume && s->refresh_volume)
 484         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 485
 486     if (!pa_cvolume_equal(&old_volume, &s->volume))
 487         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 488
 489     return &s->volume;
 490 }
 491
 492 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 493     int changed;
 494
 495     pa_source_assert_ref(s);
 496     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 497
 498     changed = s->muted != mute;
 499     s->muted = mute;
 500
 501     if (s->set_mute && s->set_mute(s) < 0)
 502         s->set_mute = NULL;
 503
 504     if (!s->set_mute)
 505         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 506
 507     if (changed)
 508         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 509 }
 510
 511 pa_bool_t pa_source_get_mute(pa_source *s) {
 512     pa_bool_t old_muted;
 513
 514     pa_source_assert_ref(s);
 515     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 516
 517     old_muted = s->muted;
 518
 519     if (s->get_mute && s->get_mute(s) < 0)
 520         s->get_mute = NULL;
 521
 522     if (!s->get_mute && s->refresh_muted)
 523         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 524
 525     if (old_muted != s->muted)
 526         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 527
 528     return s->muted;
 529 }
 530
 531 void pa_source_set_description(pa_source *s, const char *description) {
 532     const char *old;
 533     pa_source_assert_ref(s);
 534
 535     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 536         return;
 537
 538     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 539
 540     if (old && description && !strcmp(old, description))
 541         return;
 542
 543     if (description)
 544         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 545     else
 546         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 547
 548     if (PA_SOURCE_IS_LINKED(s->state)) {
 549         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 550         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 551     }
 552 }
 553
 554 unsigned pa_source_linked_by(pa_source *s) {
 555     pa_source_assert_ref(s);
 556     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 557
 558     return pa_idxset_size(s->outputs);
 559 }
 560
 561 unsigned pa_source_used_by(pa_source *s) {
 562     unsigned ret;
 563
 564     pa_source_assert_ref(s);
 565     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 566
 567     ret = pa_idxset_size(s->outputs);
 568     pa_assert(ret >= s->n_corked);
 569
 570     return ret - s->n_corked;
 571 }
 572
 573 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 574     pa_source *s = PA_SOURCE(object);
 575     pa_source_assert_ref(s);
 576     pa_assert(s->thread_info.state != PA_SOURCE_UNLINKED);
 577
 578     switch ((pa_source_message_t) code) {
 579         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 580             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 581
 582             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 583
 584             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 585
 586             pa_assert(!o->thread_info.attached);
 587             o->thread_info.attached = TRUE;
 588
 589             if (o->attach)
 590                 o->attach(o);
 591
 592             pa_source_output_set_state_within_thread(o, o->state);
 593
 594             pa_source_invalidate_requested_latency(s);
 595
 596             return 0;
 597         }
 598
 599         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 600             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 601
 602             pa_source_output_set_state_within_thread(o, o->state);
 603
 604             if (o->detach)
 605                 o->detach(o);
 606
 607             pa_assert(o->thread_info.attached);
 608             o->thread_info.attached = FALSE;
 609
 610             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 611                 pa_source_output_unref(o);
 612
 613             pa_source_invalidate_requested_latency(s);
 614
 615             return 0;
 616         }
 617
 618         case PA_SOURCE_MESSAGE_SET_VOLUME:
 619             s->thread_info.soft_volume = *((pa_cvolume*) userdata);
 620             return 0;
 621
 622         case PA_SOURCE_MESSAGE_SET_MUTE:
 623             s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
 624             return 0;
 625
 626         case PA_SOURCE_MESSAGE_GET_VOLUME:
 627             *((pa_cvolume*) userdata) = s->thread_info.soft_volume;
 628             return 0;
 629
 630         case PA_SOURCE_MESSAGE_GET_MUTE:
 631             *((pa_bool_t*) userdata) = s->thread_info.soft_muted;
 632             return 0;
 633
 634         case PA_SOURCE_MESSAGE_SET_STATE:
 635             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 636             return 0;
 637
 638         case PA_SOURCE_MESSAGE_DETACH:
 639
 640             /* We're detaching all our output streams so that the
 641              * asyncmsgq and rtpoll fields can be changed without
 642              * problems */
 643             pa_source_detach_within_thread(s);
 644             return 0;
 645
 646         case PA_SOURCE_MESSAGE_ATTACH:
 647
 648             /* Reattach all streams */
 649             pa_source_attach_within_thread(s);
 650             return 0;
 651
 652         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 653
 654             pa_usec_t *usec = userdata;
 655             *usec = pa_source_get_requested_latency_within_thread(s);
 656             return 0;
 657         }
 658
 659         case PA_SOURCE_MESSAGE_GET_LATENCY:
 660         case PA_SOURCE_MESSAGE_MAX:
 661             ;
 662     }
 663
 664     return -1;
 665 }
 666
 667 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 668     uint32_t idx;
 669     pa_source *source;
 670     int ret = 0;
 671
 672     pa_core_assert_ref(c);
 673
 674     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 675         ret -= pa_source_suspend(source, suspend) < 0;
 676
 677     return ret;
 678 }
 679
 680 void pa_source_detach(pa_source *s) {
 681     pa_source_assert_ref(s);
 682     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 683
 684     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL);
 685 }
 686
 687 void pa_source_attach(pa_source *s) {
 688     pa_source_assert_ref(s);
 689     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 690
 691     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL);
 692 }
 693
 694 void pa_source_detach_within_thread(pa_source *s) {
 695     pa_source_output *o;
 696     void *state = NULL;
 697
 698     pa_source_assert_ref(s);
 699     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 700
 701     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 702         if (o->detach)
 703             o->detach(o);
 704 }
 705
 706 void pa_source_attach_within_thread(pa_source *s) {
 707     pa_source_output *o;
 708     void *state = NULL;
 709
 710     pa_source_assert_ref(s);
 711     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 712
 713     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 714         if (o->attach)
 715             o->attach(o);
 716 }
 717
 718 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
 719     pa_usec_t result = (pa_usec_t) -1;
 720     pa_source_output *o;
 721     void *state = NULL;
 722
 723     pa_source_assert_ref(s);
 724
 725     if (s->thread_info.requested_latency_valid)
 726         return s->thread_info.requested_latency;
 727
 728     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 729
 730         if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
 731             (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
 732             result = o->thread_info.requested_source_latency;
 733
 734     if (result != (pa_usec_t) -1) {
 735         if (s->max_latency > 0 && result > s->max_latency)
 736             result = s->max_latency;
 737
 738         if (s->min_latency > 0 && result < s->min_latency)
 739             result = s->min_latency;
 740     }
 741
 742     s->thread_info.requested_latency = result;
 743     s->thread_info.requested_latency_valid = TRUE;
 744
 745     return result;
 746 }
 747
 748 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
 749     pa_usec_t usec;
 750
 751     pa_source_assert_ref(s);
 752     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 753
 754     if (!PA_SOURCE_IS_OPENED(s->state))
 755         return 0;
 756
 757     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) < 0)
 758         return 0;
 759
 760     if (usec == (pa_usec_t) -1)
 761         usec = s->max_latency;
 762
 763     return usec;
 764 }
 765
 766 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
 767     pa_source_output *o;
 768     void *state = NULL;
 769
 770     pa_source_assert_ref(s);
 771
 772     if (max_rewind == s->thread_info.max_rewind)
 773         return;
 774
 775     s->thread_info.max_rewind = max_rewind;
 776
 777     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 778         pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 779 }
 780
 781 void pa_source_invalidate_requested_latency(pa_source *s) {
 782
 783     pa_source_assert_ref(s);
 784     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 785
 786     s->thread_info.requested_latency_valid = FALSE;
 787
 788     if (s->update_requested_latency)
 789         s->update_requested_latency(s);
 790 }