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