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 #include <pulse/util.h>
  35
  36 #include <pulsecore/source-output.h>
  37 #include <pulsecore/namereg.h>
  38 #include <pulsecore/core-subscribe.h>
  39 #include <pulsecore/log.h>
  40 #include <pulsecore/sample-util.h>
  41
  42 #include "source.h"
  43
  44 #define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
  45
  46 static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
  47
  48 static void source_free(pa_object *o);
  49
  50 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
  51     pa_assert(data);
  52
  53     memset(data, 0, sizeof(*data));
  54     data->proplist = pa_proplist_new();
  55
  56     return data;
  57 }
  58
  59 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
  60     pa_assert(data);
  61
  62     pa_xfree(data->name);
  63     data->name = pa_xstrdup(name);
  64 }
  65
  66 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
  67     pa_assert(data);
  68
  69     if ((data->sample_spec_is_set = !!spec))
  70         data->sample_spec = *spec;
  71 }
  72
  73 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
  74     pa_assert(data);
  75
  76     if ((data->channel_map_is_set = !!map))
  77         data->channel_map = *map;
  78 }
  79
  80 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
  81     pa_assert(data);
  82
  83     if ((data->volume_is_set = !!volume))
  84         data->volume = *volume;
  85 }
  86
  87 void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) {
  88     pa_assert(data);
  89
  90     data->muted_is_set = TRUE;
  91     data->muted = !!mute;
  92 }
  93
  94 void pa_source_new_data_done(pa_source_new_data *data) {
  95     pa_assert(data);
  96
  97     pa_xfree(data->name);
  98     pa_proplist_free(data->proplist);
  99 }
 100
 101 /* Called from main context */
 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->update_requested_latency = NULL;
 111 }
 112
 113 /* Called from main context */
 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     char *pt;
 123
 124     pa_assert(core);
 125     pa_assert(data);
 126     pa_assert(data->name);
 127
 128     s = pa_msgobject_new(pa_source);
 129
 130     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
 131         pa_xfree(s);
 132         return NULL;
 133     }
 134
 135     pa_source_new_data_set_name(data, name);
 136
 137     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
 138         pa_xfree(s);
 139         pa_namereg_unregister(core, name);
 140         return NULL;
 141     }
 142
 143     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 144     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 145
 146     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 147
 148     if (!data->channel_map_is_set)
 149         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 150
 151     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 152     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 153
 154     if (!data->volume_is_set)
 155         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 156
 157     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 158     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 159
 160     if (!data->muted_is_set)
 161         data->muted = FALSE;
 162
 163     if (data->card)
 164         pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->card->proplist);
 165
 166     pa_device_init_description(data->proplist);
 167     pa_device_init_icon(data->proplist, FALSE);
 168
 169     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
 170         pa_xfree(s);
 171         pa_namereg_unregister(core, name);
 172         return NULL;
 173     }
 174
 175     s->parent.parent.free = source_free;
 176     s->parent.process_msg = pa_source_process_msg;
 177
 178     s->core = core;
 179     s->state = PA_SOURCE_INIT;
 180     s->flags = flags;
 181     s->name = pa_xstrdup(name);
 182     s->proplist = pa_proplist_copy(data->proplist);
 183     s->driver = pa_xstrdup(pa_path_get_filename(data->driver));
 184     s->module = data->module;
 185     s->card = data->card;
 186
 187     s->sample_spec = data->sample_spec;
 188     s->channel_map = data->channel_map;
 189
 190     s->outputs = pa_idxset_new(NULL, NULL);
 191     s->n_corked = 0;
 192     s->monitor_of = NULL;
 193
 194     s->virtual_volume = data->volume;
 195     pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
 196     s->base_volume = PA_VOLUME_NORM;
 197     s->n_volume_steps = PA_VOLUME_NORM+1;
 198     s->muted = data->muted;
 199     s->refresh_volume = s->refresh_muted = FALSE;
 200
 201     reset_callbacks(s);
 202     s->userdata = NULL;
 203
 204     s->asyncmsgq = NULL;
 205     s->rtpoll = NULL;
 206
 207     pa_silence_memchunk_get(
 208             &core->silence_cache,
 209             core->mempool,
 210             &s->silence,
 211             &s->sample_spec,
 212             0);
 213
 214     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 215     s->thread_info.soft_volume = s->soft_volume;
 216     s->thread_info.soft_muted = s->muted;
 217     s->thread_info.state = s->state;
 218     s->thread_info.max_rewind = 0;
 219     s->thread_info.requested_latency_valid = FALSE;
 220     s->thread_info.requested_latency = 0;
 221     s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
 222     s->thread_info.max_latency = 0;
 223
 224     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 225
 226     if (s->card)
 227         pa_assert_se(pa_idxset_put(s->card->sources, s, NULL) >= 0);
 228
 229     pt = pa_proplist_to_string_sep(s->proplist, "\n    ");
 230     pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s\n    %s",
 231                 s->index,
 232                 s->name,
 233                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 234                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map),
 235                 pt);
 236     pa_xfree(pt);
 237
 238     return s;
 239 }
 240
 241 /* Called from main context */
 242 static int source_set_state(pa_source *s, pa_source_state_t state) {
 243     int ret;
 244     pa_bool_t suspend_change;
 245     pa_source_state_t original_state;
 246
 247     pa_assert(s);
 248
 249     if (s->state == state)
 250         return 0;
 251
 252     original_state = s->state;
 253
 254     suspend_change =
 255         (original_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) ||
 256         (PA_SOURCE_IS_OPENED(original_state) && state == PA_SOURCE_SUSPENDED);
 257
 258     if (s->set_state)
 259         if ((ret = s->set_state(s, state)) < 0)
 260             return ret;
 261
 262     if (s->asyncmsgq)
 263         if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
 264
 265             if (s->set_state)
 266                 s->set_state(s, original_state);
 267
 268             return ret;
 269         }
 270
 271     s->state = state;
 272
 273     if (state != PA_SOURCE_UNLINKED) { /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 274         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 275         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 276     }
 277
 278     if (suspend_change) {
 279         pa_source_output *o;
 280         uint32_t idx;
 281
 282         /* We're suspending or resuming, tell everyone about it */
 283
 284         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 285             if (s->state == PA_SOURCE_SUSPENDED &&
 286                 (o->flags & PA_SOURCE_OUTPUT_FAIL_ON_SUSPEND))
 287                 pa_source_output_kill(o);
 288             else if (o->suspend)
 289                 o->suspend(o, state == PA_SOURCE_SUSPENDED);
 290     }
 291
 292
 293     return 0;
 294 }
 295
 296 /* Called from main context */
 297 void pa_source_put(pa_source *s) {
 298     pa_source_assert_ref(s);
 299
 300     pa_assert(s->state == PA_SOURCE_INIT);
 301
 302     /* The following fields must be initialized properly when calling _put() */
 303     pa_assert(s->asyncmsgq);
 304     pa_assert(s->rtpoll);
 305     pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
 306               s->thread_info.min_latency <= s->thread_info.max_latency);
 307
 308     if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL)) {
 309         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 310
 311         s->thread_info.soft_volume = s->soft_volume;
 312         s->thread_info.soft_muted = s->muted;
 313     }
 314
 315     if (s->flags & PA_SOURCE_DECIBEL_VOLUME)
 316         s->n_volume_steps = PA_VOLUME_NORM+1;
 317
 318     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 319
 320     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 321     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 322 }
 323
 324 /* Called from main context */
 325 void pa_source_unlink(pa_source *s) {
 326     pa_bool_t linked;
 327     pa_source_output *o, *j = NULL;
 328
 329     pa_assert(s);
 330
 331     /* See pa_sink_unlink() for a couple of comments how this function
 332      * works. */
 333
 334     linked = PA_SOURCE_IS_LINKED(s->state);
 335
 336     if (linked)
 337         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 338
 339     if (s->state != PA_SOURCE_UNLINKED)
 340         pa_namereg_unregister(s->core, s->name);
 341     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 342
 343     if (s->card)
 344         pa_idxset_remove_by_data(s->card->sources, s, NULL);
 345
 346     while ((o = pa_idxset_first(s->outputs, NULL))) {
 347         pa_assert(o != j);
 348         pa_source_output_kill(o);
 349         j = o;
 350     }
 351
 352     if (linked)
 353         source_set_state(s, PA_SOURCE_UNLINKED);
 354     else
 355         s->state = PA_SOURCE_UNLINKED;
 356
 357     reset_callbacks(s);
 358
 359     if (linked) {
 360         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 361         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 362     }
 363 }
 364
 365 /* Called from main context */
 366 static void source_free(pa_object *o) {
 367     pa_source_output *so;
 368     pa_source *s = PA_SOURCE(o);
 369
 370     pa_assert(s);
 371     pa_assert(pa_source_refcnt(s) == 0);
 372
 373     if (PA_SOURCE_IS_LINKED(s->state))
 374         pa_source_unlink(s);
 375
 376     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 377
 378     pa_idxset_free(s->outputs, NULL, NULL);
 379
 380     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 381         pa_source_output_unref(so);
 382
 383     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 384
 385     if (s->silence.memblock)
 386         pa_memblock_unref(s->silence.memblock);
 387
 388     pa_xfree(s->name);
 389     pa_xfree(s->driver);
 390
 391     if (s->proplist)
 392         pa_proplist_free(s->proplist);
 393
 394     pa_xfree(s);
 395 }
 396
 397 /* Called from main context */
 398 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 399     pa_source_assert_ref(s);
 400
 401     s->asyncmsgq = q;
 402 }
 403
 404 /* Called from main context */
 405 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 406     pa_source_assert_ref(s);
 407
 408     s->rtpoll = p;
 409 }
 410
 411 /* Called from main context */
 412 int pa_source_update_status(pa_source*s) {
 413     pa_source_assert_ref(s);
 414     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 415
 416     if (s->state == PA_SOURCE_SUSPENDED)
 417         return 0;
 418
 419     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 420 }
 421
 422 /* Called from main context */
 423 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 424     pa_source_assert_ref(s);
 425     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 426
 427     if (suspend)
 428         return source_set_state(s, PA_SOURCE_SUSPENDED);
 429     else
 430         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 431 }
 432
 433 /* Called from main context */
 434 pa_queue *pa_source_move_all_start(pa_source *s) {
 435     pa_queue *q;
 436     pa_source_output *o, *n;
 437     uint32_t idx;
 438
 439     pa_source_assert_ref(s);
 440     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 441
 442     q = pa_queue_new();
 443
 444     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = n) {
 445         n = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx));
 446
 447         if (pa_source_output_start_move(o) >= 0)
 448             pa_queue_push(q, pa_source_output_ref(o));
 449     }
 450
 451     return q;
 452 }
 453
 454 /* Called from main context */
 455 void pa_source_move_all_finish(pa_source *s, pa_queue *q, pa_bool_t save) {
 456     pa_source_output *o;
 457
 458     pa_source_assert_ref(s);
 459     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 460     pa_assert(q);
 461
 462     while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
 463         if (pa_source_output_finish_move(o, s, save) < 0)
 464             pa_source_output_kill(o);
 465
 466         pa_source_output_unref(o);
 467     }
 468
 469     pa_queue_free(q, NULL, NULL);
 470 }
 471
 472 /* Called from main context */
 473 void pa_source_move_all_fail(pa_queue *q) {
 474     pa_source_output *o;
 475     pa_assert(q);
 476
 477     while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
 478         if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FAIL], o) == PA_HOOK_OK) {
 479             pa_source_output_kill(o);
 480             pa_source_output_unref(o);
 481         }
 482     }
 483
 484     pa_queue_free(q, NULL, NULL);
 485 }
 486
 487 /* Called from IO thread context */
 488 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
 489     pa_source_output *o;
 490     void *state = NULL;
 491
 492     pa_source_assert_ref(s);
 493     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 494
 495     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 496         return;
 497
 498     if (nbytes <= 0)
 499         return;
 500
 501     pa_log_debug("Processing rewind...");
 502
 503     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 504         pa_source_output_assert_ref(o);
 505         pa_source_output_process_rewind(o, nbytes);
 506     }
 507 }
 508
 509 /* Called from IO thread context */
 510 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 511     pa_source_output *o;
 512     void *state = NULL;
 513
 514     pa_source_assert_ref(s);
 515     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 516     pa_assert(chunk);
 517
 518     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 519         return;
 520
 521     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 522         pa_memchunk vchunk = *chunk;
 523
 524         pa_memblock_ref(vchunk.memblock);
 525         pa_memchunk_make_writable(&vchunk, 0);
 526
 527         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 528             pa_silence_memchunk(&vchunk, &s->sample_spec);
 529         else
 530             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 531
 532         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 533             pa_source_output_assert_ref(o);
 534
 535             if (!o->thread_info.direct_on_input)
 536                 pa_source_output_push(o, &vchunk);
 537         }
 538
 539         pa_memblock_unref(vchunk.memblock);
 540     } else {
 541
 542         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 543             pa_source_output_assert_ref(o);
 544
 545             if (!o->thread_info.direct_on_input)
 546                 pa_source_output_push(o, chunk);
 547         }
 548     }
 549 }
 550
 551 /* Called from IO thread context */
 552 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
 553     pa_source_assert_ref(s);
 554     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 555     pa_source_output_assert_ref(o);
 556     pa_assert(o->thread_info.direct_on_input);
 557     pa_assert(chunk);
 558
 559     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 560         return;
 561
 562     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 563         pa_memchunk vchunk = *chunk;
 564
 565         pa_memblock_ref(vchunk.memblock);
 566         pa_memchunk_make_writable(&vchunk, 0);
 567
 568         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 569             pa_silence_memchunk(&vchunk, &s->sample_spec);
 570         else
 571             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 572
 573         pa_source_output_push(o, &vchunk);
 574
 575         pa_memblock_unref(vchunk.memblock);
 576     } else
 577         pa_source_output_push(o, chunk);
 578 }
 579
 580 /* Called from main thread */
 581 pa_usec_t pa_source_get_latency(pa_source *s) {
 582     pa_usec_t usec;
 583
 584     pa_source_assert_ref(s);
 585     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 586
 587     if (s->state == PA_SOURCE_SUSPENDED)
 588         return 0;
 589
 590     if (!(s->flags & PA_SOURCE_LATENCY))
 591         return 0;
 592
 593     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 594
 595     return usec;
 596 }
 597
 598 /* Called from main thread */
 599 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 600     pa_cvolume old_virtual_volume;
 601     pa_bool_t virtual_volume_changed;
 602
 603     pa_source_assert_ref(s);
 604     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 605     pa_assert(volume);
 606     pa_assert(pa_cvolume_valid(volume));
 607     pa_assert(pa_cvolume_compatible(volume, &s->sample_spec));
 608
 609     old_virtual_volume = s->virtual_volume;
 610     s->virtual_volume = *volume;
 611     virtual_volume_changed = !pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume);
 612
 613     if (s->set_volume) {
 614         pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
 615         s->set_volume(s);
 616     } else
 617         s->soft_volume = s->virtual_volume;
 618
 619     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
 620
 621     if (virtual_volume_changed)
 622         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 623 }
 624
 625 /* Called from main thread. Only to be called by source implementor */
 626 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
 627     pa_source_assert_ref(s);
 628     pa_assert(volume);
 629
 630     if (PA_SOURCE_IS_LINKED(s->state))
 631         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
 632     else
 633         s->thread_info.soft_volume = *volume;
 634 }
 635
 636 /* Called from main thread */
 637 const pa_cvolume *pa_source_get_volume(pa_source *s, pa_bool_t force_refresh) {
 638     pa_source_assert_ref(s);
 639     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 640
 641     if (s->refresh_volume || force_refresh) {
 642         pa_cvolume old_virtual_volume = s->virtual_volume;
 643
 644         if (s->get_volume)
 645             s->get_volume(s);
 646
 647         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, NULL, 0, NULL) == 0);
 648
 649         if (!pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume))
 650             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 651     }
 652
 653     return &s->virtual_volume;
 654 }
 655
 656 /* Called from main thread */
 657 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 658     pa_bool_t old_muted;
 659
 660     pa_source_assert_ref(s);
 661     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 662
 663     old_muted = s->muted;
 664     s->muted = mute;
 665
 666     if (s->set_mute)
 667         s->set_mute(s);
 668
 669     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
 670
 671     if (old_muted != s->muted)
 672         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 673 }
 674
 675 /* Called from main thread */
 676 pa_bool_t pa_source_get_mute(pa_source *s, pa_bool_t force_refresh) {
 677
 678     pa_source_assert_ref(s);
 679     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 680
 681     if (s->refresh_muted || force_refresh) {
 682         pa_bool_t old_muted = s->muted;
 683
 684         if (s->get_mute)
 685             s->get_mute(s);
 686
 687         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, NULL, 0, NULL) == 0);
 688
 689         if (old_muted != s->muted)
 690             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 691     }
 692
 693     return s->muted;
 694 }
 695
 696 /* Called from main thread */
 697 pa_bool_t pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
 698     pa_source_assert_ref(s);
 699     pa_assert(p);
 700
 701     pa_proplist_update(s->proplist, mode, p);
 702
 703     if (PA_SOURCE_IS_LINKED(s->state)) {
 704         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 705         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 706     }
 707
 708     return TRUE;
 709 }
 710
 711 /* Called from main thread */
 712 void pa_source_set_description(pa_source *s, const char *description) {
 713     const char *old;
 714     pa_source_assert_ref(s);
 715
 716     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 717         return;
 718
 719     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 720
 721     if (old && description && !strcmp(old, description))
 722         return;
 723
 724     if (description)
 725         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 726     else
 727         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 728
 729     if (PA_SOURCE_IS_LINKED(s->state)) {
 730         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 731         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 732     }
 733 }
 734
 735 /* Called from main thread */
 736 unsigned pa_source_linked_by(pa_source *s) {
 737     pa_source_assert_ref(s);
 738     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 739
 740     return pa_idxset_size(s->outputs);
 741 }
 742
 743 /* Called from main thread */
 744 unsigned pa_source_used_by(pa_source *s) {
 745     unsigned ret;
 746
 747     pa_source_assert_ref(s);
 748     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 749
 750     ret = pa_idxset_size(s->outputs);
 751     pa_assert(ret >= s->n_corked);
 752
 753     return ret - s->n_corked;
 754 }
 755
 756 /* Called from main thread */
 757 unsigned pa_source_check_suspend(pa_source *s) {
 758     unsigned ret;
 759     pa_source_output *o;
 760     uint32_t idx;
 761
 762     pa_source_assert_ref(s);
 763
 764     if (!PA_SOURCE_IS_LINKED(s->state))
 765         return 0;
 766
 767     ret = 0;
 768
 769     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx))) {
 770         pa_source_output_state_t st;
 771
 772         st = pa_source_output_get_state(o);
 773         pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(st));
 774
 775         if (st == PA_SOURCE_OUTPUT_CORKED)
 776             continue;
 777
 778         if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
 779             continue;
 780
 781         ret ++;
 782     }
 783
 784     return ret;
 785 }
 786
 787 /* Called from IO thread, except when it is not */
 788 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 789     pa_source *s = PA_SOURCE(object);
 790     pa_source_assert_ref(s);
 791
 792     switch ((pa_source_message_t) code) {
 793
 794         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 795             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 796
 797             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 798
 799             if (o->direct_on_input) {
 800                 o->thread_info.direct_on_input = o->direct_on_input;
 801                 pa_hashmap_put(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index), o);
 802             }
 803
 804             pa_assert(!o->thread_info.attached);
 805             o->thread_info.attached = TRUE;
 806
 807             if (o->attach)
 808                 o->attach(o);
 809
 810             pa_source_output_set_state_within_thread(o, o->state);
 811
 812             if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
 813                 pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 814
 815             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 816
 817             /* We don't just invalidate the requested latency here,
 818              * because if we are in a move we might need to fix up the
 819              * requested latency. */
 820             pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 821
 822             return 0;
 823         }
 824
 825         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 826             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 827
 828             pa_source_output_set_state_within_thread(o, o->state);
 829
 830             if (o->detach)
 831                 o->detach(o);
 832
 833             pa_assert(o->thread_info.attached);
 834             o->thread_info.attached = FALSE;
 835
 836             if (o->thread_info.direct_on_input) {
 837                 pa_hashmap_remove(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index));
 838                 o->thread_info.direct_on_input = NULL;
 839             }
 840
 841             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 842                 pa_source_output_unref(o);
 843
 844             pa_source_invalidate_requested_latency(s);
 845
 846             return 0;
 847         }
 848
 849         case PA_SOURCE_MESSAGE_SET_VOLUME:
 850             s->thread_info.soft_volume = s->soft_volume;
 851             return 0;
 852
 853         case PA_SOURCE_MESSAGE_GET_VOLUME:
 854             return 0;
 855
 856         case PA_SOURCE_MESSAGE_SET_MUTE:
 857             s->thread_info.soft_muted = s->muted;
 858             return 0;
 859
 860         case PA_SOURCE_MESSAGE_GET_MUTE:
 861             return 0;
 862
 863         case PA_SOURCE_MESSAGE_SET_STATE:
 864             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 865             return 0;
 866
 867         case PA_SOURCE_MESSAGE_DETACH:
 868
 869             /* Detach all streams */
 870             pa_source_detach_within_thread(s);
 871             return 0;
 872
 873         case PA_SOURCE_MESSAGE_ATTACH:
 874
 875             /* Reattach all streams */
 876             pa_source_attach_within_thread(s);
 877             return 0;
 878
 879         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 880
 881             pa_usec_t *usec = userdata;
 882             *usec = pa_source_get_requested_latency_within_thread(s);
 883
 884             if (*usec == (pa_usec_t) -1)
 885                 *usec = s->thread_info.max_latency;
 886
 887             return 0;
 888         }
 889
 890         case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
 891             pa_usec_t *r = userdata;
 892
 893             pa_source_update_latency_range(s, r[0], r[1]);
 894
 895             return 0;
 896         }
 897
 898         case PA_SOURCE_MESSAGE_GET_LATENCY_RANGE: {
 899             pa_usec_t *r = userdata;
 900
 901             r[0] = s->thread_info.min_latency;
 902             r[1] = s->thread_info.max_latency;
 903
 904             return 0;
 905         }
 906
 907         case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
 908
 909             *((size_t*) userdata) = s->thread_info.max_rewind;
 910             return 0;
 911
 912         case PA_SOURCE_MESSAGE_GET_LATENCY:
 913
 914             if (s->monitor_of) {
 915                 *((pa_usec_t*) userdata) = 0;
 916                 return 0;
 917             }
 918
 919             /* Implementors need to overwrite this implementation! */
 920             return -1;
 921
 922         case PA_SOURCE_MESSAGE_MAX:
 923             ;
 924     }
 925
 926     return -1;
 927 }
 928
 929 /* Called from main thread */
 930 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 931     uint32_t idx;
 932     pa_source *source;
 933     int ret = 0;
 934
 935     pa_core_assert_ref(c);
 936
 937     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 938         ret -= pa_source_suspend(source, suspend) < 0;
 939
 940     return ret;
 941 }
 942
 943 /* Called from main thread */
 944 void pa_source_detach(pa_source *s) {
 945     pa_source_assert_ref(s);
 946     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 947
 948     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL) == 0);
 949 }
 950
 951 /* Called from main thread */
 952 void pa_source_attach(pa_source *s) {
 953     pa_source_assert_ref(s);
 954     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 955
 956     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
 957 }
 958
 959 /* Called from IO thread */
 960 void pa_source_detach_within_thread(pa_source *s) {
 961     pa_source_output *o;
 962     void *state = NULL;
 963
 964     pa_source_assert_ref(s);
 965     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 966
 967     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 968         if (o->detach)
 969             o->detach(o);
 970 }
 971
 972 /* Called from IO thread */
 973 void pa_source_attach_within_thread(pa_source *s) {
 974     pa_source_output *o;
 975     void *state = NULL;
 976
 977     pa_source_assert_ref(s);
 978     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 979
 980     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 981         if (o->attach)
 982             o->attach(o);
 983 }
 984
 985 /* Called from IO thread */
 986 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
 987     pa_usec_t result = (pa_usec_t) -1;
 988     pa_source_output *o;
 989     void *state = NULL;
 990
 991     pa_source_assert_ref(s);
 992
 993     if (s->thread_info.requested_latency_valid)
 994         return s->thread_info.requested_latency;
 995
 996     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 997
 998         if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
 999             (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
1000             result = o->thread_info.requested_source_latency;
1001
1002     if (result != (pa_usec_t) -1) {
1003         if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
1004             result = s->thread_info.max_latency;
1005
1006         if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
1007             result = s->thread_info.min_latency;
1008     }
1009
1010     s->thread_info.requested_latency = result;
1011     s->thread_info.requested_latency_valid = TRUE;
1012
1013     return result;
1014 }
1015
1016 /* Called from main thread */
1017 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
1018     pa_usec_t usec;
1019
1020     pa_source_assert_ref(s);
1021     pa_assert(PA_SOURCE_IS_LINKED(s->state));
1022
1023     if (s->state == PA_SOURCE_SUSPENDED)
1024         return 0;
1025
1026     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
1027
1028     return usec;
1029 }
1030
1031 /* Called from IO thread */
1032 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
1033     pa_source_output *o;
1034     void *state = NULL;
1035
1036     pa_source_assert_ref(s);
1037
1038     if (max_rewind == s->thread_info.max_rewind)
1039         return;
1040
1041     s->thread_info.max_rewind = max_rewind;
1042
1043     if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
1044         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1045             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
1046     }
1047 }
1048
1049 void pa_source_invalidate_requested_latency(pa_source *s) {
1050     pa_source_output *o;
1051     void *state = NULL;
1052
1053     pa_source_assert_ref(s);
1054
1055     s->thread_info.requested_latency_valid = FALSE;
1056
1057     if (s->update_requested_latency)
1058         s->update_requested_latency(s);
1059
1060     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1061         if (o->update_source_requested_latency)
1062             o->update_source_requested_latency(o);
1063
1064     if (s->monitor_of)
1065         pa_sink_invalidate_requested_latency(s->monitor_of);
1066 }
1067
1068 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1069     pa_source_assert_ref(s);
1070
1071     /* min_latency == 0:           no limit
1072      * min_latency == (size_t) -1: default limit
1073      * min_latency anything else:  specified limit
1074      *
1075      * Similar for max_latency */
1076
1077     if (min_latency == (pa_usec_t) -1)
1078         min_latency = DEFAULT_MIN_LATENCY;
1079
1080     if (max_latency == (pa_usec_t) -1)
1081         max_latency = min_latency;
1082
1083     pa_assert(!min_latency || !max_latency ||
1084               min_latency <= max_latency);
1085
1086     if (PA_SOURCE_IS_LINKED(s->state)) {
1087         pa_usec_t r[2];
1088
1089         r[0] = min_latency;
1090         r[1] = max_latency;
1091
1092         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
1093     } else {
1094         s->thread_info.min_latency = min_latency;
1095         s->thread_info.max_latency = max_latency;
1096
1097         s->thread_info.requested_latency_valid = FALSE;
1098     }
1099 }
1100
1101 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
1102    pa_source_assert_ref(s);
1103    pa_assert(min_latency);
1104    pa_assert(max_latency);
1105
1106    if (PA_SOURCE_IS_LINKED(s->state)) {
1107        pa_usec_t r[2] = { 0, 0 };
1108
1109        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
1110
1111        *min_latency = r[0];
1112        *max_latency = r[1];
1113    } else {
1114        *min_latency = s->thread_info.min_latency;
1115        *max_latency = s->thread_info.max_latency;
1116    }
1117 }
1118
1119 /* Called from IO thread */
1120 void pa_source_update_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1121     pa_source_output *o;
1122     void *state = NULL;
1123
1124     pa_source_assert_ref(s);
1125
1126     pa_assert(!min_latency || !max_latency ||
1127               min_latency <= max_latency);
1128
1129     s->thread_info.min_latency = min_latency;
1130     s->thread_info.max_latency = max_latency;
1131
1132     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1133         if (o->update_source_latency_range)
1134             o->update_source_latency_range(o);
1135
1136     pa_source_invalidate_requested_latency(s);
1137 }
1138
1139 size_t pa_source_get_max_rewind(pa_source *s) {
1140     size_t r;
1141     pa_source_assert_ref(s);
1142
1143     if (!PA_SOURCE_IS_LINKED(s->state))
1144         return s->thread_info.max_rewind;
1145
1146     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
1147
1148     return r;
1149 }