code.delx.au - pulseaudio/blob - src/pulsecore/source.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 <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <pulse/utf8.h>
  32 #include <pulse/xmalloc.h>
  33 #include <pulse/timeval.h>
  34
  35 #include <pulsecore/source-output.h>
  36 #include <pulsecore/namereg.h>
  37 #include <pulsecore/core-subscribe.h>
  38 #include <pulsecore/log.h>
  39 #include <pulsecore/sample-util.h>
  40
  41 #include "source.h"
  42
  43 #define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
  44
  45 static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
  46
  47 static void source_free(pa_object *o);
  48
  49 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
  50     pa_assert(data);
  51
  52     memset(data, 0, sizeof(*data));
  53     data->proplist = pa_proplist_new();
  54
  55     return data;
  56 }
  57
  58 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
  59     pa_assert(data);
  60
  61     pa_xfree(data->name);
  62     data->name = pa_xstrdup(name);
  63 }
  64
  65 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
  66     pa_assert(data);
  67
  68     if ((data->sample_spec_is_set = !!spec))
  69         data->sample_spec = *spec;
  70 }
  71
  72 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
  73     pa_assert(data);
  74
  75     if ((data->channel_map_is_set = !!map))
  76         data->channel_map = *map;
  77 }
  78
  79 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
  80     pa_assert(data);
  81
  82     if ((data->volume_is_set = !!volume))
  83         data->volume = *volume;
  84 }
  85
  86 void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) {
  87     pa_assert(data);
  88
  89     data->muted_is_set = TRUE;
  90     data->muted = !!mute;
  91 }
  92
  93 void pa_source_new_data_done(pa_source_new_data *data) {
  94     pa_assert(data);
  95
  96     pa_xfree(data->name);
  97     pa_proplist_free(data->proplist);
  98 }
  99
 100 /* Called from main context */
 101 static void reset_callbacks(pa_source *s) {
 102     pa_assert(s);
 103
 104     s->set_state = NULL;
 105     s->get_volume = NULL;
 106     s->set_volume = NULL;
 107     s->get_mute = NULL;
 108     s->set_mute = NULL;
 109     s->update_requested_latency = NULL;
 110 }
 111
 112 /* Called from main context */
 113 pa_source* pa_source_new(
 114         pa_core *core,
 115         pa_source_new_data *data,
 116         pa_source_flags_t flags) {
 117
 118     pa_source *s;
 119     const char *name;
 120     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 121
 122     pa_assert(core);
 123     pa_assert(data);
 124     pa_assert(data->name);
 125
 126     s = pa_msgobject_new(pa_source);
 127
 128     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
 129         pa_xfree(s);
 130         return NULL;
 131     }
 132
 133     pa_source_new_data_set_name(data, name);
 134
 135     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
 136         pa_xfree(s);
 137         pa_namereg_unregister(core, name);
 138         return NULL;
 139     }
 140
 141     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 142     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 143
 144     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 145
 146     if (!data->channel_map_is_set)
 147         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 148
 149     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 150     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 151
 152     if (!data->volume_is_set)
 153         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 154
 155     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 156     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 157
 158     if (!data->muted_is_set)
 159         data->muted = FALSE;
 160
 161     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
 162         pa_xfree(s);
 163         pa_namereg_unregister(core, name);
 164         return NULL;
 165     }
 166
 167     s->parent.parent.free = source_free;
 168     s->parent.process_msg = pa_source_process_msg;
 169
 170     s->core = core;
 171     s->state = PA_SOURCE_INIT;
 172     s->flags = flags;
 173     s->name = pa_xstrdup(name);
 174     s->proplist = pa_proplist_copy(data->proplist);
 175     s->driver = pa_xstrdup(data->driver);
 176     s->module = data->module;
 177
 178     s->sample_spec = data->sample_spec;
 179     s->channel_map = data->channel_map;
 180
 181     s->outputs = pa_idxset_new(NULL, NULL);
 182     s->n_corked = 0;
 183     s->monitor_of = NULL;
 184
 185     s->volume = data->volume;
 186     s->muted = data->muted;
 187     s->refresh_volume = s->refresh_muted = FALSE;
 188     s->base_volume = PA_VOLUME_NORM;
 189
 190     reset_callbacks(s);
 191     s->userdata = NULL;
 192
 193     s->asyncmsgq = NULL;
 194     s->rtpoll = NULL;
 195
 196     pa_silence_memchunk_get(
 197             &core->silence_cache,
 198             core->mempool,
 199             &s->silence,
 200             &s->sample_spec,
 201             0);
 202
 203     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 204     pa_cvolume_reset(&s->thread_info.soft_volume, s->sample_spec.channels);
 205     s->thread_info.soft_muted = FALSE;
 206     s->thread_info.state = s->state;
 207     s->thread_info.max_rewind = 0;
 208     s->thread_info.requested_latency_valid = FALSE;
 209     s->thread_info.requested_latency = 0;
 210     s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
 211     s->thread_info.max_latency = 0;
 212
 213     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 214
 215     pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s",
 216                 s->index,
 217                 s->name,
 218                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 219                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map));
 220
 221     return s;
 222 }
 223
 224 /* Called from main context */
 225 static int source_set_state(pa_source *s, pa_source_state_t state) {
 226     int ret;
 227     pa_bool_t suspend_change;
 228     pa_source_state_t original_state;
 229
 230     pa_assert(s);
 231
 232     if (s->state == state)
 233         return 0;
 234
 235     original_state = s->state;
 236
 237     suspend_change =
 238         (original_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) ||
 239         (PA_SOURCE_IS_OPENED(original_state) && state == PA_SOURCE_SUSPENDED);
 240
 241     if (s->set_state)
 242         if ((ret = s->set_state(s, state)) < 0)
 243             return ret;
 244
 245     if (s->asyncmsgq)
 246         if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
 247
 248             if (s->set_state)
 249                 s->set_state(s, original_state);
 250
 251             return ret;
 252         }
 253
 254     s->state = state;
 255
 256     if (suspend_change) {
 257         pa_source_output *o;
 258         uint32_t idx;
 259
 260         /* We're suspending or resuming, tell everyone about it */
 261
 262         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 263             if (o->suspend)
 264                 o->suspend(o, state == PA_SOURCE_SUSPENDED);
 265     }
 266
 267     if (state != PA_SOURCE_UNLINKED) /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 268         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 269
 270     return 0;
 271 }
 272
 273 /* Called from main context */
 274 void pa_source_put(pa_source *s) {
 275     pa_source_assert_ref(s);
 276
 277     pa_assert(s->state == PA_SOURCE_INIT);
 278
 279     /* The following fields must be initialized properly when calling _put() */
 280     pa_assert(s->asyncmsgq);
 281     pa_assert(s->rtpoll);
 282     pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
 283               s->thread_info.min_latency <= s->thread_info.max_latency);
 284
 285     if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL)) {
 286         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 287
 288         s->thread_info.soft_volume = s->volume;
 289         s->thread_info.soft_muted = s->muted;
 290     }
 291
 292     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 293
 294     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 295     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 296 }
 297
 298 /* Called from main context */
 299 void pa_source_unlink(pa_source *s) {
 300     pa_bool_t linked;
 301     pa_source_output *o, *j = NULL;
 302
 303     pa_assert(s);
 304
 305     /* See pa_sink_unlink() for a couple of comments how this function
 306      * works. */
 307
 308     linked = PA_SOURCE_IS_LINKED(s->state);
 309
 310     if (linked)
 311         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 312
 313     if (s->state != PA_SOURCE_UNLINKED)
 314         pa_namereg_unregister(s->core, s->name);
 315     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 316
 317     while ((o = pa_idxset_first(s->outputs, NULL))) {
 318         pa_assert(o != j);
 319         pa_source_output_kill(o);
 320         j = o;
 321     }
 322
 323     if (linked)
 324         source_set_state(s, PA_SOURCE_UNLINKED);
 325     else
 326         s->state = PA_SOURCE_UNLINKED;
 327
 328     reset_callbacks(s);
 329
 330     if (linked) {
 331         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 332         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 333     }
 334 }
 335
 336 /* Called from main context */
 337 static void source_free(pa_object *o) {
 338     pa_source_output *so;
 339     pa_source *s = PA_SOURCE(o);
 340
 341     pa_assert(s);
 342     pa_assert(pa_source_refcnt(s) == 0);
 343
 344     if (PA_SOURCE_IS_LINKED(s->state))
 345         pa_source_unlink(s);
 346
 347     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 348
 349     pa_idxset_free(s->outputs, NULL, NULL);
 350
 351     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 352         pa_source_output_unref(so);
 353
 354     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 355
 356     if (s->silence.memblock)
 357         pa_memblock_unref(s->silence.memblock);
 358
 359     pa_xfree(s->name);
 360     pa_xfree(s->driver);
 361
 362     if (s->proplist)
 363         pa_proplist_free(s->proplist);
 364
 365     pa_xfree(s);
 366 }
 367
 368 /* Called from main context */
 369 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 370     pa_source_assert_ref(s);
 371
 372     s->asyncmsgq = q;
 373 }
 374
 375 /* Called from main context */
 376 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 377     pa_source_assert_ref(s);
 378
 379     s->rtpoll = p;
 380 }
 381
 382 /* Called from main context */
 383 int pa_source_update_status(pa_source*s) {
 384     pa_source_assert_ref(s);
 385     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 386
 387     if (s->state == PA_SOURCE_SUSPENDED)
 388         return 0;
 389
 390     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 391 }
 392
 393 /* Called from main context */
 394 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 395     pa_source_assert_ref(s);
 396     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 397
 398     if (suspend)
 399         return source_set_state(s, PA_SOURCE_SUSPENDED);
 400     else
 401         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 402 }
 403
 404 /* Called from IO thread context */
 405 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
 406     pa_source_output *o;
 407     void *state = NULL;
 408
 409     pa_source_assert_ref(s);
 410     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 411
 412     if (nbytes <= 0)
 413         return;
 414
 415     pa_log_debug("Processing rewind...");
 416
 417     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 418         pa_source_output_assert_ref(o);
 419         pa_source_output_process_rewind(o, nbytes);
 420     }
 421 }
 422
 423 /* Called from IO thread context */
 424 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 425     pa_source_output *o;
 426     void *state = NULL;
 427
 428     pa_source_assert_ref(s);
 429     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 430     pa_assert(chunk);
 431
 432     if (s->thread_info.state != PA_SOURCE_RUNNING)
 433         return;
 434
 435     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 436         pa_memchunk vchunk = *chunk;
 437
 438         pa_memblock_ref(vchunk.memblock);
 439         pa_memchunk_make_writable(&vchunk, 0);
 440
 441         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 442             pa_silence_memchunk(&vchunk, &s->sample_spec);
 443         else
 444             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 445
 446         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 447             pa_source_output_assert_ref(o);
 448
 449             if (!o->thread_info.direct_on_input)
 450                 pa_source_output_push(o, &vchunk);
 451         }
 452
 453         pa_memblock_unref(vchunk.memblock);
 454     } else {
 455
 456         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 457             pa_source_output_assert_ref(o);
 458
 459             if (!o->thread_info.direct_on_input)
 460                 pa_source_output_push(o, chunk);
 461         }
 462     }
 463 }
 464
 465 /* Called from IO thread context */
 466 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
 467     pa_source_assert_ref(s);
 468     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 469     pa_source_output_assert_ref(o);
 470     pa_assert(o->thread_info.direct_on_input);
 471     pa_assert(chunk);
 472
 473     if (s->thread_info.state != PA_SOURCE_RUNNING)
 474         return;
 475
 476     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 477         pa_memchunk vchunk = *chunk;
 478
 479         pa_memblock_ref(vchunk.memblock);
 480         pa_memchunk_make_writable(&vchunk, 0);
 481
 482         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 483             pa_silence_memchunk(&vchunk, &s->sample_spec);
 484         else
 485             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 486
 487         pa_source_output_push(o, &vchunk);
 488
 489         pa_memblock_unref(vchunk.memblock);
 490     } else
 491         pa_source_output_push(o, chunk);
 492 }
 493
 494 /* Called from main thread */
 495 pa_usec_t pa_source_get_latency(pa_source *s) {
 496     pa_usec_t usec;
 497
 498     pa_source_assert_ref(s);
 499     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 500
 501     if (!PA_SOURCE_IS_OPENED(s->state))
 502         return 0;
 503
 504     if (!(s->flags & PA_SOURCE_LATENCY))
 505         return 0;
 506
 507     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 508
 509     return usec;
 510 }
 511
 512 /* Called from main thread */
 513 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 514     pa_bool_t changed;
 515
 516     pa_source_assert_ref(s);
 517     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 518     pa_assert(volume);
 519
 520     changed = !pa_cvolume_equal(volume, &s->volume);
 521     s->volume = *volume;
 522
 523     if (s->set_volume && s->set_volume(s) < 0)
 524         s->set_volume = NULL;
 525
 526     if (!s->set_volume)
 527         pa_source_set_soft_volume(s, volume);
 528
 529     if (changed)
 530         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 531 }
 532
 533 /* Called from main thread */
 534 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
 535     pa_source_assert_ref(s);
 536     pa_assert(volume);
 537
 538     if (PA_SOURCE_IS_LINKED(s->state))
 539         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, volume, 0, NULL);
 540     else
 541         s->thread_info.soft_volume = *volume;
 542 }
 543
 544 /* Called from main thread */
 545 const pa_cvolume *pa_source_get_volume(pa_source *s, pa_bool_t force_refresh) {
 546     pa_source_assert_ref(s);
 547     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 548
 549     if (s->refresh_volume || force_refresh) {
 550         pa_cvolume old_volume = s->volume;
 551
 552         if (s->get_volume && s->get_volume(s) < 0)
 553             s->get_volume = NULL;
 554
 555         if (!s->get_volume)
 556             pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 557
 558         if (!pa_cvolume_equal(&old_volume, &s->volume))
 559             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 560     }
 561
 562     return &s->volume;
 563 }
 564
 565 /* Called from main thread */
 566 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 567     pa_bool_t changed;
 568
 569     pa_source_assert_ref(s);
 570     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 571
 572     changed = s->muted != mute;
 573     s->muted = mute;
 574
 575     if (s->set_mute && s->set_mute(s) < 0)
 576         s->set_mute = NULL;
 577
 578     if (!s->set_mute)
 579         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 580
 581     if (changed)
 582         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 583 }
 584
 585 /* Called from main thread */
 586 pa_bool_t pa_source_get_mute(pa_source *s, pa_bool_t force_refresh) {
 587
 588     pa_source_assert_ref(s);
 589     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 590
 591     if (s->refresh_muted || force_refresh) {
 592         pa_bool_t old_muted = s->muted;
 593
 594         if (s->get_mute && s->get_mute(s) < 0)
 595             s->get_mute = NULL;
 596
 597         if (!s->get_mute)
 598             pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 599
 600         if (old_muted != s->muted)
 601             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 602     }
 603
 604     return s->muted;
 605 }
 606
 607 pa_bool_t pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
 608
 609     pa_source_assert_ref(s);
 610
 611     pa_proplist_update(s->proplist, mode, p);
 612
 613     if (PA_SOURCE_IS_LINKED(s->state)) {
 614         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 615         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 616     }
 617
 618     return TRUE;
 619 }
 620
 621 /* Called from main thread */
 622 void pa_source_set_description(pa_source *s, const char *description) {
 623     const char *old;
 624     pa_source_assert_ref(s);
 625
 626     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 627         return;
 628
 629     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 630
 631     if (old && description && !strcmp(old, description))
 632         return;
 633
 634     if (description)
 635         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 636     else
 637         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 638
 639     if (PA_SOURCE_IS_LINKED(s->state)) {
 640         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 641         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 642     }
 643 }
 644
 645 /* Called from main thread */
 646 unsigned pa_source_linked_by(pa_source *s) {
 647     pa_source_assert_ref(s);
 648     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 649
 650     return pa_idxset_size(s->outputs);
 651 }
 652
 653 /* Called from main thread */
 654 unsigned pa_source_used_by(pa_source *s) {
 655     unsigned ret;
 656
 657     pa_source_assert_ref(s);
 658     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 659
 660     ret = pa_idxset_size(s->outputs);
 661     pa_assert(ret >= s->n_corked);
 662
 663     return ret - s->n_corked;
 664 }
 665
 666 /* Called from main thread */
 667 unsigned pa_source_check_suspend(pa_source *s) {
 668     unsigned ret;
 669     pa_source_output *o;
 670     uint32_t idx;
 671
 672     pa_source_assert_ref(s);
 673
 674     if (!PA_SOURCE_IS_LINKED(s->state))
 675         return 0;
 676
 677     ret = 0;
 678
 679     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx))) {
 680         pa_source_output_state_t st;
 681
 682         st = pa_source_output_get_state(o);
 683         pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(st));
 684
 685         if (st == PA_SOURCE_OUTPUT_CORKED)
 686             continue;
 687
 688         if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
 689             continue;
 690
 691         ret ++;
 692     }
 693
 694     return ret;
 695 }
 696
 697 /* Called from IO thread, except when it is not */
 698 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 699     pa_source *s = PA_SOURCE(object);
 700     pa_source_assert_ref(s);
 701
 702     switch ((pa_source_message_t) code) {
 703
 704         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 705             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 706
 707             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 708
 709             if (o->direct_on_input) {
 710                 o->thread_info.direct_on_input = o->direct_on_input;
 711                 pa_hashmap_put(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index), o);
 712             }
 713
 714             pa_assert(!o->thread_info.attached);
 715             o->thread_info.attached = TRUE;
 716
 717             if (o->attach)
 718                 o->attach(o);
 719
 720             pa_source_output_set_state_within_thread(o, o->state);
 721
 722             if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
 723                 pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 724
 725             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 726
 727             /* We don't just invalidate the requested latency here,
 728              * because if we are in a move we might need to fix up the
 729              * requested latency. */
 730             pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 731
 732             return 0;
 733         }
 734
 735         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 736             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 737
 738             pa_source_output_set_state_within_thread(o, o->state);
 739
 740             if (o->detach)
 741                 o->detach(o);
 742
 743             pa_assert(o->thread_info.attached);
 744             o->thread_info.attached = FALSE;
 745
 746             if (o->thread_info.direct_on_input) {
 747                 pa_hashmap_remove(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index));
 748                 o->thread_info.direct_on_input = NULL;
 749             }
 750
 751             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 752                 pa_source_output_unref(o);
 753
 754             pa_source_invalidate_requested_latency(s);
 755
 756             return 0;
 757         }
 758
 759         case PA_SOURCE_MESSAGE_SET_VOLUME:
 760             s->thread_info.soft_volume = *((pa_cvolume*) userdata);
 761             return 0;
 762
 763         case PA_SOURCE_MESSAGE_SET_MUTE:
 764             s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
 765             return 0;
 766
 767         case PA_SOURCE_MESSAGE_GET_VOLUME:
 768             *((pa_cvolume*) userdata) = s->thread_info.soft_volume;
 769             return 0;
 770
 771         case PA_SOURCE_MESSAGE_GET_MUTE:
 772             *((pa_bool_t*) userdata) = s->thread_info.soft_muted;
 773             return 0;
 774
 775         case PA_SOURCE_MESSAGE_SET_STATE:
 776             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 777             return 0;
 778
 779         case PA_SOURCE_MESSAGE_DETACH:
 780
 781             /* Detach all streams */
 782             pa_source_detach_within_thread(s);
 783             return 0;
 784
 785         case PA_SOURCE_MESSAGE_ATTACH:
 786
 787             /* Reattach all streams */
 788             pa_source_attach_within_thread(s);
 789             return 0;
 790
 791         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 792
 793             pa_usec_t *usec = userdata;
 794             *usec = pa_source_get_requested_latency_within_thread(s);
 795
 796             if (*usec == (pa_usec_t) -1)
 797                 *usec = s->thread_info.max_latency;
 798
 799             return 0;
 800         }
 801
 802         case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
 803             pa_usec_t *r = userdata;
 804
 805             pa_source_update_latency_range(s, r[0], r[1]);
 806
 807             return 0;
 808         }
 809
 810         case PA_SOURCE_MESSAGE_GET_LATENCY_RANGE: {
 811             pa_usec_t *r = userdata;
 812
 813             r[0] = s->thread_info.min_latency;
 814             r[1] = s->thread_info.max_latency;
 815
 816             return 0;
 817         }
 818
 819         case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
 820
 821             *((size_t*) userdata) = s->thread_info.max_rewind;
 822             return 0;
 823
 824         case PA_SOURCE_MESSAGE_GET_LATENCY:
 825
 826             if (s->monitor_of) {
 827                 *((pa_usec_t*) userdata) = 0;
 828                 return 0;
 829             }
 830
 831             /* Implementors need to overwrite this implementation! */
 832             return -1;
 833
 834         case PA_SOURCE_MESSAGE_MAX:
 835             ;
 836     }
 837
 838     return -1;
 839 }
 840
 841 /* Called from main thread */
 842 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 843     uint32_t idx;
 844     pa_source *source;
 845     int ret = 0;
 846
 847     pa_core_assert_ref(c);
 848
 849     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 850         ret -= pa_source_suspend(source, suspend) < 0;
 851
 852     return ret;
 853 }
 854
 855 /* Called from main thread */
 856 void pa_source_detach(pa_source *s) {
 857     pa_source_assert_ref(s);
 858     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 859
 860     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL) == 0);
 861 }
 862
 863 /* Called from main thread */
 864 void pa_source_attach(pa_source *s) {
 865     pa_source_assert_ref(s);
 866     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 867
 868     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
 869 }
 870
 871 /* Called from IO thread */
 872 void pa_source_detach_within_thread(pa_source *s) {
 873     pa_source_output *o;
 874     void *state = NULL;
 875
 876     pa_source_assert_ref(s);
 877     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 878
 879     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 880         if (o->detach)
 881             o->detach(o);
 882 }
 883
 884 /* Called from IO thread */
 885 void pa_source_attach_within_thread(pa_source *s) {
 886     pa_source_output *o;
 887     void *state = NULL;
 888
 889     pa_source_assert_ref(s);
 890     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 891
 892     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 893         if (o->attach)
 894             o->attach(o);
 895 }
 896
 897 /* Called from IO thread */
 898 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
 899     pa_usec_t result = (pa_usec_t) -1;
 900     pa_source_output *o;
 901     void *state = NULL;
 902
 903     pa_source_assert_ref(s);
 904
 905     if (s->thread_info.requested_latency_valid)
 906         return s->thread_info.requested_latency;
 907
 908     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 909
 910         if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
 911             (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
 912             result = o->thread_info.requested_source_latency;
 913
 914     if (result != (pa_usec_t) -1) {
 915         if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
 916             result = s->thread_info.max_latency;
 917
 918         if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
 919             result = s->thread_info.min_latency;
 920     }
 921
 922     s->thread_info.requested_latency = result;
 923     s->thread_info.requested_latency_valid = TRUE;
 924
 925     return result;
 926 }
 927
 928 /* Called from main thread */
 929 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
 930     pa_usec_t usec;
 931
 932     pa_source_assert_ref(s);
 933     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 934
 935     if (!PA_SOURCE_IS_OPENED(s->state))
 936         return 0;
 937
 938     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 939
 940     return usec;
 941 }
 942
 943 /* Called from IO thread */
 944 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
 945     pa_source_output *o;
 946     void *state = NULL;
 947
 948     pa_source_assert_ref(s);
 949
 950     if (max_rewind == s->thread_info.max_rewind)
 951         return;
 952
 953     s->thread_info.max_rewind = max_rewind;
 954
 955     if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
 956         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 957             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 958     }
 959 }
 960
 961 void pa_source_invalidate_requested_latency(pa_source *s) {
 962     pa_source_output *o;
 963     void *state = NULL;
 964
 965     pa_source_assert_ref(s);
 966
 967     s->thread_info.requested_latency_valid = FALSE;
 968
 969     if (s->update_requested_latency)
 970         s->update_requested_latency(s);
 971
 972     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 973         if (o->update_source_requested_latency)
 974             o->update_source_requested_latency(o);
 975
 976     if (s->monitor_of)
 977         pa_sink_invalidate_requested_latency(s->monitor_of);
 978 }
 979
 980 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
 981     pa_source_assert_ref(s);
 982
 983     /* min_latency == 0:           no limit
 984      * min_latency == (size_t) -1: default limit
 985      * min_latency anything else:  specified limit
 986      *
 987      * Similar for max_latency */
 988
 989     if (min_latency == (pa_usec_t) -1)
 990         min_latency = DEFAULT_MIN_LATENCY;
 991
 992     if (max_latency == (pa_usec_t) -1)
 993         max_latency = min_latency;
 994
 995     pa_assert(!min_latency || !max_latency ||
 996               min_latency <= max_latency);
 997
 998     if (PA_SOURCE_IS_LINKED(s->state)) {
 999         pa_usec_t r[2];
1000
1001         r[0] = min_latency;
1002         r[1] = max_latency;
1003
1004         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
1005     } else {
1006         s->thread_info.min_latency = min_latency;
1007         s->thread_info.max_latency = max_latency;
1008
1009         s->thread_info.requested_latency_valid = FALSE;
1010     }
1011 }
1012
1013 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
1014    pa_source_assert_ref(s);
1015    pa_assert(min_latency);
1016    pa_assert(max_latency);
1017
1018    if (PA_SOURCE_IS_LINKED(s->state)) {
1019        pa_usec_t r[2] = { 0, 0 };
1020
1021        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
1022
1023        *min_latency = r[0];
1024        *max_latency = r[1];
1025    } else {
1026        *min_latency = s->thread_info.min_latency;
1027        *max_latency = s->thread_info.max_latency;
1028    }
1029 }
1030
1031 /* Called from IO thread */
1032 void pa_source_update_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1033     pa_source_output *o;
1034     void *state = NULL;
1035
1036     pa_source_assert_ref(s);
1037
1038     s->thread_info.min_latency = min_latency;
1039     s->thread_info.max_latency = max_latency;
1040
1041     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1042         if (o->update_source_latency_range)
1043             o->update_source_latency_range(o);
1044
1045     pa_source_invalidate_requested_latency(s);
1046 }
1047
1048 size_t pa_source_get_max_rewind(pa_source *s) {
1049     size_t r;
1050     pa_source_assert_ref(s);
1051
1052     if (!PA_SOURCE_IS_LINKED(s->state))
1053         return s->thread_info.max_rewind;
1054
1055     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
1056
1057     return r;
1058 }