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 2.1 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 ABSOLUTE_MIN_LATENCY (500)
  45 #define ABSOLUTE_MAX_LATENCY (10*PA_USEC_PER_SEC)
  46 #define DEFAULT_FIXED_LATENCY (250*PA_USEC_PER_MSEC)
  47
  48 static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
  49
  50 static void source_free(pa_object *o);
  51
  52 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
  53     pa_assert(data);
  54
  55     memset(data, 0, sizeof(*data));
  56     data->proplist = pa_proplist_new();
  57
  58     return data;
  59 }
  60
  61 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
  62     pa_assert(data);
  63
  64     pa_xfree(data->name);
  65     data->name = pa_xstrdup(name);
  66 }
  67
  68 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
  69     pa_assert(data);
  70
  71     if ((data->sample_spec_is_set = !!spec))
  72         data->sample_spec = *spec;
  73 }
  74
  75 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
  76     pa_assert(data);
  77
  78     if ((data->channel_map_is_set = !!map))
  79         data->channel_map = *map;
  80 }
  81
  82 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
  83     pa_assert(data);
  84
  85     if ((data->volume_is_set = !!volume))
  86         data->volume = *volume;
  87 }
  88
  89 void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) {
  90     pa_assert(data);
  91
  92     data->muted_is_set = TRUE;
  93     data->muted = !!mute;
  94 }
  95
  96 void pa_source_new_data_done(pa_source_new_data *data) {
  97     pa_assert(data);
  98
  99     pa_xfree(data->name);
 100     pa_proplist_free(data->proplist);
 101 }
 102
 103 /* Called from main context */
 104 static void reset_callbacks(pa_source *s) {
 105     pa_assert(s);
 106
 107     s->set_state = NULL;
 108     s->get_volume = NULL;
 109     s->set_volume = NULL;
 110     s->get_mute = NULL;
 111     s->set_mute = NULL;
 112     s->update_requested_latency = NULL;
 113 }
 114
 115 /* Called from main context */
 116 pa_source* pa_source_new(
 117         pa_core *core,
 118         pa_source_new_data *data,
 119         pa_source_flags_t flags) {
 120
 121     pa_source *s;
 122     const char *name;
 123     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 124     char *pt;
 125
 126     pa_assert(core);
 127     pa_assert(data);
 128     pa_assert(data->name);
 129
 130     s = pa_msgobject_new(pa_source);
 131
 132     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
 133         pa_xfree(s);
 134         return NULL;
 135     }
 136
 137     pa_source_new_data_set_name(data, name);
 138
 139     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
 140         pa_xfree(s);
 141         pa_namereg_unregister(core, name);
 142         return NULL;
 143     }
 144
 145     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 146     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 147
 148     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 149
 150     if (!data->channel_map_is_set)
 151         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 152
 153     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 154     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 155
 156     if (!data->volume_is_set)
 157         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 158
 159     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 160     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 161
 162     if (!data->muted_is_set)
 163         data->muted = FALSE;
 164
 165     if (data->card)
 166         pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->card->proplist);
 167
 168     pa_device_init_description(data->proplist);
 169     pa_device_init_icon(data->proplist, FALSE);
 170
 171     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
 172         pa_xfree(s);
 173         pa_namereg_unregister(core, name);
 174         return NULL;
 175     }
 176
 177     s->parent.parent.free = source_free;
 178     s->parent.process_msg = pa_source_process_msg;
 179
 180     s->core = core;
 181     s->state = PA_SOURCE_INIT;
 182     s->flags = flags;
 183     s->name = pa_xstrdup(name);
 184     s->proplist = pa_proplist_copy(data->proplist);
 185     s->driver = pa_xstrdup(pa_path_get_filename(data->driver));
 186     s->module = data->module;
 187     s->card = data->card;
 188
 189     s->sample_spec = data->sample_spec;
 190     s->channel_map = data->channel_map;
 191
 192     s->outputs = pa_idxset_new(NULL, NULL);
 193     s->n_corked = 0;
 194     s->monitor_of = NULL;
 195
 196     s->virtual_volume = data->volume;
 197     pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
 198     s->base_volume = PA_VOLUME_NORM;
 199     s->n_volume_steps = PA_VOLUME_NORM+1;
 200     s->muted = data->muted;
 201     s->refresh_volume = s->refresh_muted = FALSE;
 202
 203     s->fixed_latency = flags & PA_SOURCE_DYNAMIC_LATENCY ? 0 : DEFAULT_FIXED_LATENCY;
 204
 205     reset_callbacks(s);
 206     s->userdata = NULL;
 207
 208     s->asyncmsgq = NULL;
 209     s->rtpoll = NULL;
 210
 211     pa_silence_memchunk_get(
 212             &core->silence_cache,
 213             core->mempool,
 214             &s->silence,
 215             &s->sample_spec,
 216             0);
 217
 218     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 219     s->thread_info.soft_volume = s->soft_volume;
 220     s->thread_info.soft_muted = s->muted;
 221     s->thread_info.state = s->state;
 222     s->thread_info.max_rewind = 0;
 223     s->thread_info.requested_latency_valid = FALSE;
 224     s->thread_info.requested_latency = 0;
 225     s->thread_info.min_latency = ABSOLUTE_MIN_LATENCY;
 226     s->thread_info.max_latency = ABSOLUTE_MAX_LATENCY;
 227
 228     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 229
 230     if (s->card)
 231         pa_assert_se(pa_idxset_put(s->card->sources, s, NULL) >= 0);
 232
 233     pt = pa_proplist_to_string_sep(s->proplist, "\n    ");
 234     pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s\n    %s",
 235                 s->index,
 236                 s->name,
 237                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 238                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map),
 239                 pt);
 240     pa_xfree(pt);
 241
 242     return s;
 243 }
 244
 245 /* Called from main context */
 246 static int source_set_state(pa_source *s, pa_source_state_t state) {
 247     int ret;
 248     pa_bool_t suspend_change;
 249     pa_source_state_t original_state;
 250
 251     pa_assert(s);
 252
 253     if (s->state == state)
 254         return 0;
 255
 256     original_state = s->state;
 257
 258     suspend_change =
 259         (original_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) ||
 260         (PA_SOURCE_IS_OPENED(original_state) && state == PA_SOURCE_SUSPENDED);
 261
 262     if (s->set_state)
 263         if ((ret = s->set_state(s, state)) < 0)
 264             return ret;
 265
 266     if (s->asyncmsgq)
 267         if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
 268
 269             if (s->set_state)
 270                 s->set_state(s, original_state);
 271
 272             return ret;
 273         }
 274
 275     s->state = state;
 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         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 280     }
 281
 282     if (suspend_change) {
 283         pa_source_output *o;
 284         uint32_t idx;
 285
 286         /* We're suspending or resuming, tell everyone about it */
 287
 288         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 289             if (s->state == PA_SOURCE_SUSPENDED &&
 290                 (o->flags & PA_SOURCE_OUTPUT_FAIL_ON_SUSPEND))
 291                 pa_source_output_kill(o);
 292             else if (o->suspend)
 293                 o->suspend(o, state == PA_SOURCE_SUSPENDED);
 294     }
 295
 296
 297     return 0;
 298 }
 299
 300 /* Called from main context */
 301 void pa_source_put(pa_source *s) {
 302     pa_source_assert_ref(s);
 303
 304     pa_assert(s->state == PA_SOURCE_INIT);
 305
 306     /* The following fields must be initialized properly when calling _put() */
 307     pa_assert(s->asyncmsgq);
 308     pa_assert(s->rtpoll);
 309     pa_assert(s->thread_info.min_latency <= s->thread_info.max_latency);
 310
 311     if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL)) {
 312         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 313
 314         s->thread_info.soft_volume = s->soft_volume;
 315         s->thread_info.soft_muted = s->muted;
 316     }
 317
 318     if (s->flags & PA_SOURCE_DECIBEL_VOLUME)
 319         s->n_volume_steps = PA_VOLUME_NORM+1;
 320
 321     if (s->flags & PA_SOURCE_DYNAMIC_LATENCY)
 322         s->fixed_latency = 0;
 323     else if (s->fixed_latency <= 0)
 324         s->fixed_latency = DEFAULT_FIXED_LATENCY;
 325
 326     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 327
 328     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 329     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 330 }
 331
 332 /* Called from main context */
 333 void pa_source_unlink(pa_source *s) {
 334     pa_bool_t linked;
 335     pa_source_output *o, *j = NULL;
 336
 337     pa_assert(s);
 338
 339     /* See pa_sink_unlink() for a couple of comments how this function
 340      * works. */
 341
 342     linked = PA_SOURCE_IS_LINKED(s->state);
 343
 344     if (linked)
 345         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 346
 347     if (s->state != PA_SOURCE_UNLINKED)
 348         pa_namereg_unregister(s->core, s->name);
 349     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 350
 351     if (s->card)
 352         pa_idxset_remove_by_data(s->card->sources, s, NULL);
 353
 354     while ((o = pa_idxset_first(s->outputs, NULL))) {
 355         pa_assert(o != j);
 356         pa_source_output_kill(o);
 357         j = o;
 358     }
 359
 360     if (linked)
 361         source_set_state(s, PA_SOURCE_UNLINKED);
 362     else
 363         s->state = PA_SOURCE_UNLINKED;
 364
 365     reset_callbacks(s);
 366
 367     if (linked) {
 368         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 369         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 370     }
 371 }
 372
 373 /* Called from main context */
 374 static void source_free(pa_object *o) {
 375     pa_source_output *so;
 376     pa_source *s = PA_SOURCE(o);
 377
 378     pa_assert(s);
 379     pa_assert(pa_source_refcnt(s) == 0);
 380
 381     if (PA_SOURCE_IS_LINKED(s->state))
 382         pa_source_unlink(s);
 383
 384     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 385
 386     pa_idxset_free(s->outputs, NULL, NULL);
 387
 388     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 389         pa_source_output_unref(so);
 390
 391     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 392
 393     if (s->silence.memblock)
 394         pa_memblock_unref(s->silence.memblock);
 395
 396     pa_xfree(s->name);
 397     pa_xfree(s->driver);
 398
 399     if (s->proplist)
 400         pa_proplist_free(s->proplist);
 401
 402     pa_xfree(s);
 403 }
 404
 405 /* Called from main context */
 406 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 407     pa_source_assert_ref(s);
 408
 409     s->asyncmsgq = q;
 410 }
 411
 412 /* Called from main context */
 413 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 414     pa_source_assert_ref(s);
 415
 416     s->rtpoll = p;
 417 }
 418
 419 /* Called from main context */
 420 int pa_source_update_status(pa_source*s) {
 421     pa_source_assert_ref(s);
 422     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 423
 424     if (s->state == PA_SOURCE_SUSPENDED)
 425         return 0;
 426
 427     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 428 }
 429
 430 /* Called from main context */
 431 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 432     pa_source_assert_ref(s);
 433     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 434
 435     if (s->monitor_of)
 436         return -PA_ERR_NOTSUPPORTED;
 437
 438     if (suspend)
 439         return source_set_state(s, PA_SOURCE_SUSPENDED);
 440     else
 441         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 442 }
 443
 444 /* Called from main context */
 445 int pa_source_sync_suspend(pa_source *s) {
 446     pa_sink_state_t state;
 447
 448     pa_source_assert_ref(s);
 449     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 450     pa_assert(s->monitor_of);
 451
 452     state = pa_sink_get_state(s->monitor_of);
 453
 454     if (state == PA_SINK_SUSPENDED)
 455         return source_set_state(s, PA_SOURCE_SUSPENDED);
 456
 457     pa_assert(PA_SINK_IS_OPENED(state));
 458
 459     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 460 }
 461
 462 /* Called from main context */
 463 pa_queue *pa_source_move_all_start(pa_source *s) {
 464     pa_queue *q;
 465     pa_source_output *o, *n;
 466     uint32_t idx;
 467
 468     pa_source_assert_ref(s);
 469     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 470
 471     q = pa_queue_new();
 472
 473     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = n) {
 474         n = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx));
 475
 476         pa_source_output_ref(o);
 477
 478         if (pa_source_output_start_move(o) >= 0)
 479             pa_queue_push(q, o);
 480         else
 481             pa_source_output_unref(o);
 482     }
 483
 484     return q;
 485 }
 486
 487 /* Called from main context */
 488 void pa_source_move_all_finish(pa_source *s, pa_queue *q, pa_bool_t save) {
 489     pa_source_output *o;
 490
 491     pa_source_assert_ref(s);
 492     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 493     pa_assert(q);
 494
 495     while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
 496         if (pa_source_output_finish_move(o, s, save) < 0)
 497             pa_source_output_kill(o);
 498
 499         pa_source_output_unref(o);
 500     }
 501
 502     pa_queue_free(q, NULL, NULL);
 503 }
 504
 505 /* Called from main context */
 506 void pa_source_move_all_fail(pa_queue *q) {
 507     pa_source_output *o;
 508     pa_assert(q);
 509
 510     while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
 511         if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FAIL], o) == PA_HOOK_OK) {
 512             pa_source_output_kill(o);
 513             pa_source_output_unref(o);
 514         }
 515     }
 516
 517     pa_queue_free(q, NULL, NULL);
 518 }
 519
 520 /* Called from IO thread context */
 521 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
 522     pa_source_output *o;
 523     void *state = NULL;
 524
 525     pa_source_assert_ref(s);
 526     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 527
 528     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 529         return;
 530
 531     if (nbytes <= 0)
 532         return;
 533
 534     pa_log_debug("Processing rewind...");
 535
 536     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 537         pa_source_output_assert_ref(o);
 538         pa_source_output_process_rewind(o, nbytes);
 539     }
 540 }
 541
 542 /* Called from IO thread context */
 543 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 544     pa_source_output *o;
 545     void *state = NULL;
 546
 547     pa_source_assert_ref(s);
 548     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 549     pa_assert(chunk);
 550
 551     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 552         return;
 553
 554     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 555         pa_memchunk vchunk = *chunk;
 556
 557         pa_memblock_ref(vchunk.memblock);
 558         pa_memchunk_make_writable(&vchunk, 0);
 559
 560         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 561             pa_silence_memchunk(&vchunk, &s->sample_spec);
 562         else
 563             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 564
 565         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 566             pa_source_output_assert_ref(o);
 567
 568             if (!o->thread_info.direct_on_input)
 569                 pa_source_output_push(o, &vchunk);
 570         }
 571
 572         pa_memblock_unref(vchunk.memblock);
 573     } else {
 574
 575         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 576             pa_source_output_assert_ref(o);
 577
 578             if (!o->thread_info.direct_on_input)
 579                 pa_source_output_push(o, chunk);
 580         }
 581     }
 582 }
 583
 584 /* Called from IO thread context */
 585 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
 586     pa_source_assert_ref(s);
 587     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 588     pa_source_output_assert_ref(o);
 589     pa_assert(o->thread_info.direct_on_input);
 590     pa_assert(chunk);
 591
 592     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 593         return;
 594
 595     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 596         pa_memchunk vchunk = *chunk;
 597
 598         pa_memblock_ref(vchunk.memblock);
 599         pa_memchunk_make_writable(&vchunk, 0);
 600
 601         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 602             pa_silence_memchunk(&vchunk, &s->sample_spec);
 603         else
 604             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 605
 606         pa_source_output_push(o, &vchunk);
 607
 608         pa_memblock_unref(vchunk.memblock);
 609     } else
 610         pa_source_output_push(o, chunk);
 611 }
 612
 613 /* Called from main thread */
 614 pa_usec_t pa_source_get_latency(pa_source *s) {
 615     pa_usec_t usec;
 616
 617     pa_source_assert_ref(s);
 618     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 619
 620     if (s->state == PA_SOURCE_SUSPENDED)
 621         return 0;
 622
 623     if (!(s->flags & PA_SOURCE_LATENCY))
 624         return 0;
 625
 626     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 627
 628     return usec;
 629 }
 630
 631 /* Called from IO thread */
 632 pa_usec_t pa_source_get_latency_within_thread(pa_source *s) {
 633     pa_usec_t usec = 0;
 634     pa_msgobject *o;
 635
 636     pa_source_assert_ref(s);
 637     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 638
 639     /* The returned value is supposed to be in the time domain of the sound card! */
 640
 641     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 642         return 0;
 643
 644     if (!(s->flags & PA_SOURCE_LATENCY))
 645         return 0;
 646
 647     o = PA_MSGOBJECT(s);
 648
 649     /* We probably should make this a proper vtable callback instead of going through process_msg() */
 650
 651     if (o->process_msg(o, PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
 652         return -1;
 653
 654     return usec;
 655 }
 656
 657 /* Called from main thread */
 658 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 659     pa_cvolume old_virtual_volume;
 660     pa_bool_t virtual_volume_changed;
 661
 662     pa_source_assert_ref(s);
 663     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 664     pa_assert(volume);
 665     pa_assert(pa_cvolume_valid(volume));
 666     pa_assert(pa_cvolume_compatible(volume, &s->sample_spec));
 667
 668     old_virtual_volume = s->virtual_volume;
 669     s->virtual_volume = *volume;
 670     virtual_volume_changed = !pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume);
 671
 672     if (s->set_volume) {
 673         pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
 674         s->set_volume(s);
 675     } else
 676         s->soft_volume = s->virtual_volume;
 677
 678     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
 679
 680     if (virtual_volume_changed)
 681         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 682 }
 683
 684 /* Called from main thread. Only to be called by source implementor */
 685 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
 686     pa_source_assert_ref(s);
 687     pa_assert(volume);
 688
 689     if (PA_SOURCE_IS_LINKED(s->state))
 690         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
 691     else
 692         s->thread_info.soft_volume = *volume;
 693 }
 694
 695 /* Called from main thread */
 696 const pa_cvolume *pa_source_get_volume(pa_source *s, pa_bool_t force_refresh) {
 697     pa_source_assert_ref(s);
 698     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 699
 700     if (s->refresh_volume || force_refresh) {
 701         pa_cvolume old_virtual_volume = s->virtual_volume;
 702
 703         if (s->get_volume)
 704             s->get_volume(s);
 705
 706         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, NULL, 0, NULL) == 0);
 707
 708         if (!pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume))
 709             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 710     }
 711
 712     return &s->virtual_volume;
 713 }
 714
 715 /* Called from main thread */
 716 void pa_source_volume_changed(pa_source *s, const pa_cvolume *new_volume) {
 717     pa_source_assert_ref(s);
 718
 719     /* The source implementor may call this if the volume changed to make sure everyone is notified */
 720
 721     if (pa_cvolume_equal(&s->virtual_volume, new_volume))
 722         return;
 723
 724     s->virtual_volume = *new_volume;
 725     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 726 }
 727
 728 /* Called from main thread */
 729 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 730     pa_bool_t old_muted;
 731
 732     pa_source_assert_ref(s);
 733     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 734
 735     old_muted = s->muted;
 736     s->muted = mute;
 737
 738     if (s->set_mute)
 739         s->set_mute(s);
 740
 741     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
 742
 743     if (old_muted != s->muted)
 744         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 745 }
 746
 747 /* Called from main thread */
 748 pa_bool_t pa_source_get_mute(pa_source *s, pa_bool_t force_refresh) {
 749     pa_source_assert_ref(s);
 750     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 751
 752     if (s->refresh_muted || force_refresh) {
 753         pa_bool_t old_muted = s->muted;
 754
 755         if (s->get_mute)
 756             s->get_mute(s);
 757
 758         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, NULL, 0, NULL) == 0);
 759
 760         if (old_muted != s->muted)
 761             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 762     }
 763
 764     return s->muted;
 765 }
 766
 767 /* Called from main thread */
 768 void pa_source_mute_changed(pa_source *s, pa_bool_t new_muted) {
 769     pa_source_assert_ref(s);
 770
 771     /* The source implementor may call this if the mute state changed to make sure everyone is notified */
 772
 773     if (s->muted == new_muted)
 774         return;
 775
 776     s->muted = new_muted;
 777     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 778 }
 779
 780 /* Called from main thread */
 781 pa_bool_t pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
 782     pa_source_assert_ref(s);
 783
 784     if (p)
 785         pa_proplist_update(s->proplist, mode, p);
 786
 787     if (PA_SOURCE_IS_LINKED(s->state)) {
 788         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 789         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 790     }
 791
 792     return TRUE;
 793 }
 794
 795 /* Called from main thread */
 796 void pa_source_set_description(pa_source *s, const char *description) {
 797     const char *old;
 798     pa_source_assert_ref(s);
 799
 800     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 801         return;
 802
 803     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 804
 805     if (old && description && !strcmp(old, description))
 806         return;
 807
 808     if (description)
 809         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 810     else
 811         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 812
 813     if (PA_SOURCE_IS_LINKED(s->state)) {
 814         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 815         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 816     }
 817 }
 818
 819 /* Called from main thread */
 820 unsigned pa_source_linked_by(pa_source *s) {
 821     pa_source_assert_ref(s);
 822     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 823
 824     return pa_idxset_size(s->outputs);
 825 }
 826
 827 /* Called from main thread */
 828 unsigned pa_source_used_by(pa_source *s) {
 829     unsigned ret;
 830
 831     pa_source_assert_ref(s);
 832     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 833
 834     ret = pa_idxset_size(s->outputs);
 835     pa_assert(ret >= s->n_corked);
 836
 837     return ret - s->n_corked;
 838 }
 839
 840 /* Called from main thread */
 841 unsigned pa_source_check_suspend(pa_source *s) {
 842     unsigned ret;
 843     pa_source_output *o;
 844     uint32_t idx;
 845
 846     pa_source_assert_ref(s);
 847
 848     if (!PA_SOURCE_IS_LINKED(s->state))
 849         return 0;
 850
 851     ret = 0;
 852
 853     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx))) {
 854         pa_source_output_state_t st;
 855
 856         st = pa_source_output_get_state(o);
 857         pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(st));
 858
 859         if (st == PA_SOURCE_OUTPUT_CORKED)
 860             continue;
 861
 862         if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
 863             continue;
 864
 865         ret ++;
 866     }
 867
 868     return ret;
 869 }
 870
 871 /* Called from IO thread, except when it is not */
 872 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 873     pa_source *s = PA_SOURCE(object);
 874     pa_source_assert_ref(s);
 875
 876     switch ((pa_source_message_t) code) {
 877
 878         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 879             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 880
 881             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 882
 883             if (o->direct_on_input) {
 884                 o->thread_info.direct_on_input = o->direct_on_input;
 885                 pa_hashmap_put(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index), o);
 886             }
 887
 888             pa_assert(!o->thread_info.attached);
 889             o->thread_info.attached = TRUE;
 890
 891             if (o->attach)
 892                 o->attach(o);
 893
 894             pa_source_output_set_state_within_thread(o, o->state);
 895
 896             if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
 897                 pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 898
 899             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 900
 901             /* We don't just invalidate the requested latency here,
 902              * because if we are in a move we might need to fix up the
 903              * requested latency. */
 904             pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 905
 906             return 0;
 907         }
 908
 909         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 910             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 911
 912             pa_source_output_set_state_within_thread(o, o->state);
 913
 914             if (o->detach)
 915                 o->detach(o);
 916
 917             pa_assert(o->thread_info.attached);
 918             o->thread_info.attached = FALSE;
 919
 920             if (o->thread_info.direct_on_input) {
 921                 pa_hashmap_remove(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index));
 922                 o->thread_info.direct_on_input = NULL;
 923             }
 924
 925             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 926                 pa_source_output_unref(o);
 927
 928             pa_source_invalidate_requested_latency(s);
 929
 930             return 0;
 931         }
 932
 933         case PA_SOURCE_MESSAGE_SET_VOLUME:
 934             s->thread_info.soft_volume = s->soft_volume;
 935             return 0;
 936
 937         case PA_SOURCE_MESSAGE_GET_VOLUME:
 938             return 0;
 939
 940         case PA_SOURCE_MESSAGE_SET_MUTE:
 941             s->thread_info.soft_muted = s->muted;
 942             return 0;
 943
 944         case PA_SOURCE_MESSAGE_GET_MUTE:
 945             return 0;
 946
 947         case PA_SOURCE_MESSAGE_SET_STATE: {
 948
 949             pa_bool_t suspend_change =
 950                 (s->thread_info.state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(PA_PTR_TO_UINT(userdata))) ||
 951                 (PA_SOURCE_IS_OPENED(s->thread_info.state) && PA_PTR_TO_UINT(userdata) == PA_SOURCE_SUSPENDED);
 952
 953             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 954
 955             if (suspend_change) {
 956                 pa_source_output *o;
 957                 void *state = NULL;
 958
 959                 while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 960                     if (o->suspend_within_thread)
 961                         o->suspend_within_thread(o, s->thread_info.state == PA_SOURCE_SUSPENDED);
 962             }
 963
 964
 965             return 0;
 966         }
 967
 968         case PA_SOURCE_MESSAGE_DETACH:
 969
 970             /* Detach all streams */
 971             pa_source_detach_within_thread(s);
 972             return 0;
 973
 974         case PA_SOURCE_MESSAGE_ATTACH:
 975
 976             /* Reattach all streams */
 977             pa_source_attach_within_thread(s);
 978             return 0;
 979
 980         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 981
 982             pa_usec_t *usec = userdata;
 983             *usec = pa_source_get_requested_latency_within_thread(s);
 984
 985             if (*usec == (pa_usec_t) -1)
 986                 *usec = s->thread_info.max_latency;
 987
 988             return 0;
 989         }
 990
 991         case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
 992             pa_usec_t *r = userdata;
 993
 994             pa_source_set_latency_range_within_thread(s, r[0], r[1]);
 995
 996             return 0;
 997         }
 998
 999         case PA_SOURCE_MESSAGE_GET_LATENCY_RANGE: {
1000             pa_usec_t *r = userdata;
1001
1002             r[0] = s->thread_info.min_latency;
1003             r[1] = s->thread_info.max_latency;
1004
1005             return 0;
1006         }
1007
1008         case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
1009
1010             *((size_t*) userdata) = s->thread_info.max_rewind;
1011             return 0;
1012
1013         case PA_SOURCE_MESSAGE_SET_MAX_REWIND:
1014
1015             pa_source_set_max_rewind_within_thread(s, (size_t) offset);
1016             return 0;
1017
1018         case PA_SOURCE_MESSAGE_GET_LATENCY:
1019
1020             if (s->monitor_of) {
1021                 *((pa_usec_t*) userdata) = 0;
1022                 return 0;
1023             }
1024
1025             /* Implementors need to overwrite this implementation! */
1026             return -1;
1027
1028         case PA_SOURCE_MESSAGE_MAX:
1029             ;
1030     }
1031
1032     return -1;
1033 }
1034
1035 /* Called from main thread */
1036 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
1037     uint32_t idx;
1038     pa_source *source;
1039     int ret = 0;
1040
1041     pa_core_assert_ref(c);
1042
1043     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx))) {
1044         int r;
1045
1046         if (source->monitor_of)
1047             continue;
1048
1049         if ((r = pa_source_suspend(source, suspend)) < 0)
1050             ret = r;
1051     }
1052
1053     return ret;
1054 }
1055
1056 /* Called from main thread */
1057 void pa_source_detach(pa_source *s) {
1058     pa_source_assert_ref(s);
1059     pa_assert(PA_SOURCE_IS_LINKED(s->state));
1060
1061     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL) == 0);
1062 }
1063
1064 /* Called from main thread */
1065 void pa_source_attach(pa_source *s) {
1066     pa_source_assert_ref(s);
1067     pa_assert(PA_SOURCE_IS_LINKED(s->state));
1068
1069     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
1070 }
1071
1072 /* Called from IO thread */
1073 void pa_source_detach_within_thread(pa_source *s) {
1074     pa_source_output *o;
1075     void *state = NULL;
1076
1077     pa_source_assert_ref(s);
1078     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
1079
1080     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1081         if (o->detach)
1082             o->detach(o);
1083 }
1084
1085 /* Called from IO thread */
1086 void pa_source_attach_within_thread(pa_source *s) {
1087     pa_source_output *o;
1088     void *state = NULL;
1089
1090     pa_source_assert_ref(s);
1091     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
1092
1093     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1094         if (o->attach)
1095             o->attach(o);
1096 }
1097
1098 /* Called from IO thread */
1099 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
1100     pa_usec_t result = (pa_usec_t) -1;
1101     pa_source_output *o;
1102     void *state = NULL;
1103
1104     pa_source_assert_ref(s);
1105
1106     if (!(s->flags & PA_SOURCE_DYNAMIC_LATENCY))
1107         return PA_CLAMP(s->fixed_latency, s->thread_info.min_latency, s->thread_info.max_latency);
1108
1109     if (s->thread_info.requested_latency_valid)
1110         return s->thread_info.requested_latency;
1111
1112     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1113
1114         if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
1115             (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
1116             result = o->thread_info.requested_source_latency;
1117
1118     if (result != (pa_usec_t) -1)
1119         result = PA_CLAMP(result, s->thread_info.min_latency, s->thread_info.max_latency);
1120
1121     s->thread_info.requested_latency = result;
1122     s->thread_info.requested_latency_valid = TRUE;
1123
1124     return result;
1125 }
1126
1127 /* Called from main thread */
1128 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
1129     pa_usec_t usec = 0;
1130
1131     pa_source_assert_ref(s);
1132     pa_assert(PA_SOURCE_IS_LINKED(s->state));
1133
1134     if (s->state == PA_SOURCE_SUSPENDED)
1135         return 0;
1136
1137     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
1138
1139     return usec;
1140 }
1141
1142 /* Called from IO thread */
1143 void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind) {
1144     pa_source_output *o;
1145     void *state = NULL;
1146
1147     pa_source_assert_ref(s);
1148
1149     if (max_rewind == s->thread_info.max_rewind)
1150         return;
1151
1152     s->thread_info.max_rewind = max_rewind;
1153
1154     if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
1155         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1156             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
1157     }
1158 }
1159
1160 /* Called from main thread */
1161 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
1162     pa_source_assert_ref(s);
1163
1164     if (PA_SOURCE_IS_LINKED(s->state))
1165         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MAX_REWIND, NULL, max_rewind, NULL) == 0);
1166     else
1167         pa_source_set_max_rewind_within_thread(s, max_rewind);
1168 }
1169
1170 /* Called from IO thread */
1171 void pa_source_invalidate_requested_latency(pa_source *s) {
1172     pa_source_output *o;
1173     void *state = NULL;
1174
1175     pa_source_assert_ref(s);
1176
1177     if (!(s->flags & PA_SOURCE_DYNAMIC_LATENCY))
1178         return;
1179
1180     s->thread_info.requested_latency_valid = FALSE;
1181
1182     if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
1183
1184         if (s->update_requested_latency)
1185             s->update_requested_latency(s);
1186
1187         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1188             if (o->update_source_requested_latency)
1189                 o->update_source_requested_latency(o);
1190     }
1191
1192     if (s->monitor_of)
1193         pa_sink_invalidate_requested_latency(s->monitor_of);
1194 }
1195
1196 /* Called from main thread */
1197 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1198     pa_source_assert_ref(s);
1199
1200     /* min_latency == 0:           no limit
1201      * min_latency anything else:  specified limit
1202      *
1203      * Similar for max_latency */
1204
1205     if (min_latency < ABSOLUTE_MIN_LATENCY)
1206         min_latency = ABSOLUTE_MIN_LATENCY;
1207
1208     if (max_latency <= 0 ||
1209         max_latency > ABSOLUTE_MAX_LATENCY)
1210         max_latency = ABSOLUTE_MAX_LATENCY;
1211
1212     pa_assert(min_latency <= max_latency);
1213
1214     /* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
1215     pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
1216                max_latency == ABSOLUTE_MAX_LATENCY) ||
1217               (s->flags & PA_SOURCE_DYNAMIC_LATENCY));
1218
1219     if (PA_SOURCE_IS_LINKED(s->state)) {
1220         pa_usec_t r[2];
1221
1222         r[0] = min_latency;
1223         r[1] = max_latency;
1224
1225         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
1226     } else
1227         pa_source_set_latency_range_within_thread(s, min_latency, max_latency);
1228 }
1229
1230 /* Called from main thread */
1231 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
1232    pa_source_assert_ref(s);
1233    pa_assert(min_latency);
1234    pa_assert(max_latency);
1235
1236    if (PA_SOURCE_IS_LINKED(s->state)) {
1237        pa_usec_t r[2] = { 0, 0 };
1238
1239        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
1240
1241        *min_latency = r[0];
1242        *max_latency = r[1];
1243    } else {
1244        *min_latency = s->thread_info.min_latency;
1245        *max_latency = s->thread_info.max_latency;
1246    }
1247 }
1248
1249 /* Called from IO thread, and from main thread before pa_source_put() is called */
1250 void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1251     void *state = NULL;
1252
1253     pa_source_assert_ref(s);
1254
1255     pa_assert(min_latency >= ABSOLUTE_MIN_LATENCY);
1256     pa_assert(max_latency <= ABSOLUTE_MAX_LATENCY);
1257     pa_assert(min_latency <= max_latency);
1258
1259     /* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
1260     pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
1261                max_latency == ABSOLUTE_MAX_LATENCY) ||
1262               (s->flags & PA_SOURCE_DYNAMIC_LATENCY) ||
1263               s->monitor_of);
1264
1265     s->thread_info.min_latency = min_latency;
1266     s->thread_info.max_latency = max_latency;
1267
1268     if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
1269         pa_source_output *o;
1270
1271         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1272             if (o->update_source_latency_range)
1273                 o->update_source_latency_range(o);
1274     }
1275
1276     pa_source_invalidate_requested_latency(s);
1277 }
1278
1279 /* Called from main thread, before the source is put */
1280 void pa_source_set_fixed_latency(pa_source *s, pa_usec_t latency) {
1281     pa_source_assert_ref(s);
1282
1283     pa_assert(pa_source_get_state(s) == PA_SOURCE_INIT);
1284
1285     if (latency < ABSOLUTE_MIN_LATENCY)
1286         latency = ABSOLUTE_MIN_LATENCY;
1287
1288     if (latency > ABSOLUTE_MAX_LATENCY)
1289         latency = ABSOLUTE_MAX_LATENCY;
1290
1291     s->fixed_latency = latency;
1292 }
1293
1294 /* Called from main thread */
1295 size_t pa_source_get_max_rewind(pa_source *s) {
1296     size_t r;
1297     pa_source_assert_ref(s);
1298
1299     if (!PA_SOURCE_IS_LINKED(s->state))
1300         return s->thread_info.max_rewind;
1301
1302     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
1303
1304     return r;
1305 }