code.delx.au - pulseaudio/blob - src/pulsecore/source.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <pulse/utf8.h>
  32 #include <pulse/xmalloc.h>
  33 #include <pulse/timeval.h>
  34
  35 #include <pulsecore/source-output.h>
  36 #include <pulsecore/namereg.h>
  37 #include <pulsecore/core-subscribe.h>
  38 #include <pulsecore/log.h>
  39 #include <pulsecore/sample-util.h>
  40
  41 #include "source.h"
  42
  43 #define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
  44
  45 static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
  46
  47 static void source_free(pa_object *o);
  48
  49 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
  50     pa_assert(data);
  51
  52     memset(data, 0, sizeof(*data));
  53     data->proplist = pa_proplist_new();
  54
  55     return data;
  56 }
  57
  58 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
  59     pa_assert(data);
  60
  61     pa_xfree(data->name);
  62     data->name = pa_xstrdup(name);
  63 }
  64
  65 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
  66     pa_assert(data);
  67
  68     if ((data->sample_spec_is_set = !!spec))
  69         data->sample_spec = *spec;
  70 }
  71
  72 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
  73     pa_assert(data);
  74
  75     if ((data->channel_map_is_set = !!map))
  76         data->channel_map = *map;
  77 }
  78
  79 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
  80     pa_assert(data);
  81
  82     if ((data->volume_is_set = !!volume))
  83         data->volume = *volume;
  84 }
  85
  86 void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) {
  87     pa_assert(data);
  88
  89     data->muted_is_set = TRUE;
  90     data->muted = !!mute;
  91 }
  92
  93 void pa_source_new_data_done(pa_source_new_data *data) {
  94     pa_assert(data);
  95
  96     pa_xfree(data->name);
  97     pa_proplist_free(data->proplist);
  98 }
  99
 100 /* Called from main context */
 101 static void reset_callbacks(pa_source *s) {
 102     pa_assert(s);
 103
 104     s->set_state = NULL;
 105     s->get_volume = NULL;
 106     s->set_volume = NULL;
 107     s->get_mute = NULL;
 108     s->set_mute = NULL;
 109     s->update_requested_latency = NULL;
 110 }
 111
 112 /* Called from main context */
 113 pa_source* pa_source_new(
 114         pa_core *core,
 115         pa_source_new_data *data,
 116         pa_source_flags_t flags) {
 117
 118     pa_source *s;
 119     const char *name;
 120     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 121
 122     pa_assert(core);
 123     pa_assert(data);
 124     pa_assert(data->name);
 125
 126     s = pa_msgobject_new(pa_source);
 127
 128     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
 129         pa_xfree(s);
 130         return NULL;
 131     }
 132
 133     pa_source_new_data_set_name(data, name);
 134
 135     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
 136         pa_xfree(s);
 137         pa_namereg_unregister(core, name);
 138         return NULL;
 139     }
 140
 141     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 142     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 143
 144     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 145
 146     if (!data->channel_map_is_set)
 147         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 148
 149     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 150     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 151
 152     if (!data->volume_is_set)
 153         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 154
 155     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 156     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 157
 158     if (!data->muted_is_set)
 159         data->muted = FALSE;
 160
 161     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
 162         pa_xfree(s);
 163         pa_namereg_unregister(core, name);
 164         return NULL;
 165     }
 166
 167     s->parent.parent.free = source_free;
 168     s->parent.process_msg = pa_source_process_msg;
 169
 170     s->core = core;
 171     s->state = PA_SOURCE_INIT;
 172     s->flags = flags;
 173     s->name = pa_xstrdup(name);
 174     s->proplist = pa_proplist_copy(data->proplist);
 175     s->driver = pa_xstrdup(data->driver);
 176     s->module = data->module;
 177     s->card = data->card;
 178
 179     s->sample_spec = data->sample_spec;
 180     s->channel_map = data->channel_map;
 181
 182     s->outputs = pa_idxset_new(NULL, NULL);
 183     s->n_corked = 0;
 184     s->monitor_of = NULL;
 185
 186     s->volume = data->volume;
 187     s->muted = data->muted;
 188     s->refresh_volume = s->refresh_muted = FALSE;
 189     s->base_volume = PA_VOLUME_NORM;
 190
 191     reset_callbacks(s);
 192     s->userdata = NULL;
 193
 194     s->asyncmsgq = NULL;
 195     s->rtpoll = NULL;
 196
 197     pa_silence_memchunk_get(
 198             &core->silence_cache,
 199             core->mempool,
 200             &s->silence,
 201             &s->sample_spec,
 202             0);
 203
 204     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 205     pa_cvolume_reset(&s->thread_info.soft_volume, s->sample_spec.channels);
 206     s->thread_info.soft_muted = FALSE;
 207     s->thread_info.state = s->state;
 208     s->thread_info.max_rewind = 0;
 209     s->thread_info.requested_latency_valid = FALSE;
 210     s->thread_info.requested_latency = 0;
 211     s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
 212     s->thread_info.max_latency = 0;
 213
 214     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 215
 216     if (s->card)
 217         pa_assert_se(pa_idxset_put(s->card->sources, s, NULL) >= 0);
 218
 219     pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s",
 220                 s->index,
 221                 s->name,
 222                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 223                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map));
 224
 225     return s;
 226 }
 227
 228 /* Called from main context */
 229 static int source_set_state(pa_source *s, pa_source_state_t state) {
 230     int ret;
 231     pa_bool_t suspend_change;
 232     pa_source_state_t original_state;
 233
 234     pa_assert(s);
 235
 236     if (s->state == state)
 237         return 0;
 238
 239     original_state = s->state;
 240
 241     suspend_change =
 242         (original_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) ||
 243         (PA_SOURCE_IS_OPENED(original_state) && state == PA_SOURCE_SUSPENDED);
 244
 245     if (s->set_state)
 246         if ((ret = s->set_state(s, state)) < 0)
 247             return ret;
 248
 249     if (s->asyncmsgq)
 250         if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
 251
 252             if (s->set_state)
 253                 s->set_state(s, original_state);
 254
 255             return ret;
 256         }
 257
 258     s->state = state;
 259
 260     if (suspend_change) {
 261         pa_source_output *o;
 262         uint32_t idx;
 263
 264         /* We're suspending or resuming, tell everyone about it */
 265
 266         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 267             if (o->suspend)
 268                 o->suspend(o, state == PA_SOURCE_SUSPENDED);
 269     }
 270
 271     if (state != PA_SOURCE_UNLINKED) /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 272         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 273
 274     return 0;
 275 }
 276
 277 /* Called from main context */
 278 void pa_source_put(pa_source *s) {
 279     pa_source_assert_ref(s);
 280
 281     pa_assert(s->state == PA_SOURCE_INIT);
 282
 283     /* The following fields must be initialized properly when calling _put() */
 284     pa_assert(s->asyncmsgq);
 285     pa_assert(s->rtpoll);
 286     pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
 287               s->thread_info.min_latency <= s->thread_info.max_latency);
 288
 289     if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL)) {
 290         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 291
 292         s->thread_info.soft_volume = s->volume;
 293         s->thread_info.soft_muted = s->muted;
 294     }
 295
 296     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 297
 298     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 299     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 300 }
 301
 302 /* Called from main context */
 303 void pa_source_unlink(pa_source *s) {
 304     pa_bool_t linked;
 305     pa_source_output *o, *j = NULL;
 306
 307     pa_assert(s);
 308
 309     /* See pa_sink_unlink() for a couple of comments how this function
 310      * works. */
 311
 312     linked = PA_SOURCE_IS_LINKED(s->state);
 313
 314     if (linked)
 315         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 316
 317     if (s->state != PA_SOURCE_UNLINKED)
 318         pa_namereg_unregister(s->core, s->name);
 319     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 320
 321     if (s->card)
 322         pa_idxset_remove_by_data(s->card->sinks, s, NULL);
 323
 324     while ((o = pa_idxset_first(s->outputs, NULL))) {
 325         pa_assert(o != j);
 326         pa_source_output_kill(o);
 327         j = o;
 328     }
 329
 330     if (linked)
 331         source_set_state(s, PA_SOURCE_UNLINKED);
 332     else
 333         s->state = PA_SOURCE_UNLINKED;
 334
 335     reset_callbacks(s);
 336
 337     if (linked) {
 338         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 339         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 340     }
 341 }
 342
 343 /* Called from main context */
 344 static void source_free(pa_object *o) {
 345     pa_source_output *so;
 346     pa_source *s = PA_SOURCE(o);
 347
 348     pa_assert(s);
 349     pa_assert(pa_source_refcnt(s) == 0);
 350
 351     if (PA_SOURCE_IS_LINKED(s->state))
 352         pa_source_unlink(s);
 353
 354     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 355
 356     pa_idxset_free(s->outputs, NULL, NULL);
 357
 358     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 359         pa_source_output_unref(so);
 360
 361     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 362
 363     if (s->silence.memblock)
 364         pa_memblock_unref(s->silence.memblock);
 365
 366     pa_xfree(s->name);
 367     pa_xfree(s->driver);
 368
 369     if (s->proplist)
 370         pa_proplist_free(s->proplist);
 371
 372     pa_xfree(s);
 373 }
 374
 375 /* Called from main context */
 376 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 377     pa_source_assert_ref(s);
 378
 379     s->asyncmsgq = q;
 380 }
 381
 382 /* Called from main context */
 383 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 384     pa_source_assert_ref(s);
 385
 386     s->rtpoll = p;
 387 }
 388
 389 /* Called from main context */
 390 int pa_source_update_status(pa_source*s) {
 391     pa_source_assert_ref(s);
 392     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 393
 394     if (s->state == PA_SOURCE_SUSPENDED)
 395         return 0;
 396
 397     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 398 }
 399
 400 /* Called from main context */
 401 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 402     pa_source_assert_ref(s);
 403     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 404
 405     if (suspend)
 406         return source_set_state(s, PA_SOURCE_SUSPENDED);
 407     else
 408         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 409 }
 410
 411 /* Called from IO thread context */
 412 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
 413     pa_source_output *o;
 414     void *state = NULL;
 415
 416     pa_source_assert_ref(s);
 417     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 418
 419     if (nbytes <= 0)
 420         return;
 421
 422     pa_log_debug("Processing rewind...");
 423
 424     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 425         pa_source_output_assert_ref(o);
 426         pa_source_output_process_rewind(o, nbytes);
 427     }
 428 }
 429
 430 /* Called from IO thread context */
 431 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 432     pa_source_output *o;
 433     void *state = NULL;
 434
 435     pa_source_assert_ref(s);
 436     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 437     pa_assert(chunk);
 438
 439     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 440         pa_memchunk vchunk = *chunk;
 441
 442         pa_memblock_ref(vchunk.memblock);
 443         pa_memchunk_make_writable(&vchunk, 0);
 444
 445         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 446             pa_silence_memchunk(&vchunk, &s->sample_spec);
 447         else
 448             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 449
 450         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 451             pa_source_output_assert_ref(o);
 452
 453             if (!o->thread_info.direct_on_input)
 454                 pa_source_output_push(o, &vchunk);
 455         }
 456
 457         pa_memblock_unref(vchunk.memblock);
 458     } else {
 459
 460         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 461             pa_source_output_assert_ref(o);
 462
 463             if (!o->thread_info.direct_on_input)
 464                 pa_source_output_push(o, chunk);
 465         }
 466     }
 467 }
 468
 469 /* Called from IO thread context */
 470 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
 471     pa_source_assert_ref(s);
 472     pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
 473     pa_source_output_assert_ref(o);
 474     pa_assert(o->thread_info.direct_on_input);
 475     pa_assert(chunk);
 476
 477     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 478         pa_memchunk vchunk = *chunk;
 479
 480         pa_memblock_ref(vchunk.memblock);
 481         pa_memchunk_make_writable(&vchunk, 0);
 482
 483         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 484             pa_silence_memchunk(&vchunk, &s->sample_spec);
 485         else
 486             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 487
 488         pa_source_output_push(o, &vchunk);
 489
 490         pa_memblock_unref(vchunk.memblock);
 491     } else
 492         pa_source_output_push(o, chunk);
 493 }
 494
 495 /* Called from main thread */
 496 pa_usec_t pa_source_get_latency(pa_source *s) {
 497     pa_usec_t usec;
 498
 499     pa_source_assert_ref(s);
 500     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 501
 502     if (!PA_SOURCE_IS_OPENED(s->state))
 503         return 0;
 504
 505     if (!(s->flags & PA_SOURCE_LATENCY))
 506         return 0;
 507
 508     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 509
 510     return usec;
 511 }
 512
 513 /* Called from main thread */
 514 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 515     pa_bool_t changed;
 516
 517     pa_source_assert_ref(s);
 518     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 519     pa_assert(volume);
 520
 521     changed = !pa_cvolume_equal(volume, &s->volume);
 522     s->volume = *volume;
 523
 524     if (s->set_volume && s->set_volume(s) < 0)
 525         s->set_volume = NULL;
 526
 527     if (!s->set_volume)
 528         pa_source_set_soft_volume(s, volume);
 529
 530     if (changed)
 531         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 532 }
 533
 534 /* Called from main thread */
 535 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
 536     pa_source_assert_ref(s);
 537     pa_assert(volume);
 538
 539     if (PA_SOURCE_IS_LINKED(s->state))
 540         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, volume, 0, NULL);
 541     else
 542         s->thread_info.soft_volume = *volume;
 543 }
 544
 545 /* Called from main thread */
 546 const pa_cvolume *pa_source_get_volume(pa_source *s, pa_bool_t force_refresh) {
 547     pa_source_assert_ref(s);
 548     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 549
 550     if (s->refresh_volume || force_refresh) {
 551         pa_cvolume old_volume = s->volume;
 552
 553         if (s->get_volume && s->get_volume(s) < 0)
 554             s->get_volume = NULL;
 555
 556         if (!s->get_volume)
 557             pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 558
 559         if (!pa_cvolume_equal(&old_volume, &s->volume))
 560             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 561     }
 562
 563     return &s->volume;
 564 }
 565
 566 /* Called from main thread */
 567 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 568     pa_bool_t changed;
 569
 570     pa_source_assert_ref(s);
 571     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 572
 573     changed = s->muted != mute;
 574     s->muted = mute;
 575
 576     if (s->set_mute && s->set_mute(s) < 0)
 577         s->set_mute = NULL;
 578
 579     if (!s->set_mute)
 580         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 581
 582     if (changed)
 583         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 584 }
 585
 586 /* Called from main thread */
 587 pa_bool_t pa_source_get_mute(pa_source *s, pa_bool_t force_refresh) {
 588
 589     pa_source_assert_ref(s);
 590     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 591
 592     if (s->refresh_muted || force_refresh) {
 593         pa_bool_t old_muted = s->muted;
 594
 595         if (s->get_mute && s->get_mute(s) < 0)
 596             s->get_mute = NULL;
 597
 598         if (!s->get_mute)
 599             pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 600
 601         if (old_muted != s->muted)
 602             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 603     }
 604
 605     return s->muted;
 606 }
 607
 608 pa_bool_t pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
 609
 610     pa_source_assert_ref(s);
 611
 612     pa_proplist_update(s->proplist, mode, p);
 613
 614     if (PA_SOURCE_IS_LINKED(s->state)) {
 615         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 616         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 617     }
 618
 619     return TRUE;
 620 }
 621
 622 /* Called from main thread */
 623 void pa_source_set_description(pa_source *s, const char *description) {
 624     const char *old;
 625     pa_source_assert_ref(s);
 626
 627     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 628         return;
 629
 630     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 631
 632     if (old && description && !strcmp(old, description))
 633         return;
 634
 635     if (description)
 636         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 637     else
 638         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 639
 640     if (PA_SOURCE_IS_LINKED(s->state)) {
 641         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 642         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 643     }
 644 }
 645
 646 /* Called from main thread */
 647 unsigned pa_source_linked_by(pa_source *s) {
 648     pa_source_assert_ref(s);
 649     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 650
 651     return pa_idxset_size(s->outputs);
 652 }
 653
 654 /* Called from main thread */
 655 unsigned pa_source_used_by(pa_source *s) {
 656     unsigned ret;
 657
 658     pa_source_assert_ref(s);
 659     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 660
 661     ret = pa_idxset_size(s->outputs);
 662     pa_assert(ret >= s->n_corked);
 663
 664     return ret - s->n_corked;
 665 }
 666
 667 /* Called from main thread */
 668 unsigned pa_source_check_suspend(pa_source *s) {
 669     unsigned ret;
 670     pa_source_output *o;
 671     uint32_t idx;
 672
 673     pa_source_assert_ref(s);
 674
 675     if (!PA_SOURCE_IS_LINKED(s->state))
 676         return 0;
 677
 678     ret = 0;
 679
 680     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx))) {
 681         pa_source_output_state_t st;
 682
 683         st = pa_source_output_get_state(o);
 684         pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(st));
 685
 686         if (st == PA_SOURCE_OUTPUT_CORKED)
 687             continue;
 688
 689         if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
 690             continue;
 691
 692         ret ++;
 693     }
 694
 695     return ret;
 696 }
 697
 698 /* Called from IO thread, except when it is not */
 699 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 700     pa_source *s = PA_SOURCE(object);
 701     pa_source_assert_ref(s);
 702
 703     switch ((pa_source_message_t) code) {
 704
 705         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 706             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 707
 708             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 709
 710             if (o->direct_on_input) {
 711                 o->thread_info.direct_on_input = o->direct_on_input;
 712                 pa_hashmap_put(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index), o);
 713             }
 714
 715             pa_assert(!o->thread_info.attached);
 716             o->thread_info.attached = TRUE;
 717
 718             if (o->attach)
 719                 o->attach(o);
 720
 721             pa_source_output_set_state_within_thread(o, o->state);
 722
 723             if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
 724                 pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 725
 726             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 727
 728             /* We don't just invalidate the requested latency here,
 729              * because if we are in a move we might need to fix up the
 730              * requested latency. */
 731             pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 732
 733             return 0;
 734         }
 735
 736         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 737             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 738
 739             pa_source_output_set_state_within_thread(o, o->state);
 740
 741             if (o->detach)
 742                 o->detach(o);
 743
 744             pa_assert(o->thread_info.attached);
 745             o->thread_info.attached = FALSE;
 746
 747             if (o->thread_info.direct_on_input) {
 748                 pa_hashmap_remove(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index));
 749                 o->thread_info.direct_on_input = NULL;
 750             }
 751
 752             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 753                 pa_source_output_unref(o);
 754
 755             pa_source_invalidate_requested_latency(s);
 756
 757             return 0;
 758         }
 759
 760         case PA_SOURCE_MESSAGE_SET_VOLUME:
 761             s->thread_info.soft_volume = *((pa_cvolume*) userdata);
 762             return 0;
 763
 764         case PA_SOURCE_MESSAGE_SET_MUTE:
 765             s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
 766             return 0;
 767
 768         case PA_SOURCE_MESSAGE_GET_VOLUME:
 769             *((pa_cvolume*) userdata) = s->thread_info.soft_volume;
 770             return 0;
 771
 772         case PA_SOURCE_MESSAGE_GET_MUTE:
 773             *((pa_bool_t*) userdata) = s->thread_info.soft_muted;
 774             return 0;
 775
 776         case PA_SOURCE_MESSAGE_SET_STATE:
 777             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 778             return 0;
 779
 780         case PA_SOURCE_MESSAGE_DETACH:
 781
 782             /* Detach all streams */
 783             pa_source_detach_within_thread(s);
 784             return 0;
 785
 786         case PA_SOURCE_MESSAGE_ATTACH:
 787
 788             /* Reattach all streams */
 789             pa_source_attach_within_thread(s);
 790             return 0;
 791
 792         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 793
 794             pa_usec_t *usec = userdata;
 795             *usec = pa_source_get_requested_latency_within_thread(s);
 796
 797             if (*usec == (pa_usec_t) -1)
 798                 *usec = s->thread_info.max_latency;
 799
 800             return 0;
 801         }
 802
 803         case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
 804             pa_usec_t *r = userdata;
 805
 806             pa_source_update_latency_range(s, r[0], r[1]);
 807
 808             return 0;
 809         }
 810
 811         case PA_SOURCE_MESSAGE_GET_LATENCY_RANGE: {
 812             pa_usec_t *r = userdata;
 813
 814             r[0] = s->thread_info.min_latency;
 815             r[1] = s->thread_info.max_latency;
 816
 817             return 0;
 818         }
 819
 820         case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
 821
 822             *((size_t*) userdata) = s->thread_info.max_rewind;
 823             return 0;
 824
 825         case PA_SOURCE_MESSAGE_GET_LATENCY:
 826
 827             if (s->monitor_of) {
 828                 *((pa_usec_t*) userdata) = 0;
 829                 return 0;
 830             }
 831
 832             /* Implementors need to overwrite this implementation! */
 833             return -1;
 834
 835         case PA_SOURCE_MESSAGE_MAX:
 836             ;
 837     }
 838
 839     return -1;
 840 }
 841
 842 /* Called from main thread */
 843 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 844     uint32_t idx;
 845     pa_source *source;
 846     int ret = 0;
 847
 848     pa_core_assert_ref(c);
 849
 850     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 851         ret -= pa_source_suspend(source, suspend) < 0;
 852
 853     return ret;
 854 }
 855
 856 /* Called from main thread */
 857 void pa_source_detach(pa_source *s) {
 858     pa_source_assert_ref(s);
 859     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 860
 861     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL) == 0);
 862 }
 863
 864 /* Called from main thread */
 865 void pa_source_attach(pa_source *s) {
 866     pa_source_assert_ref(s);
 867     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 868
 869     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
 870 }
 871
 872 /* Called from IO thread */
 873 void pa_source_detach_within_thread(pa_source *s) {
 874     pa_source_output *o;
 875     void *state = NULL;
 876
 877     pa_source_assert_ref(s);
 878     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 879
 880     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 881         if (o->detach)
 882             o->detach(o);
 883 }
 884
 885 /* Called from IO thread */
 886 void pa_source_attach_within_thread(pa_source *s) {
 887     pa_source_output *o;
 888     void *state = NULL;
 889
 890     pa_source_assert_ref(s);
 891     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 892
 893     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 894         if (o->attach)
 895             o->attach(o);
 896 }
 897
 898 /* Called from IO thread */
 899 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
 900     pa_usec_t result = (pa_usec_t) -1;
 901     pa_source_output *o;
 902     void *state = NULL;
 903
 904     pa_source_assert_ref(s);
 905
 906     if (s->thread_info.requested_latency_valid)
 907         return s->thread_info.requested_latency;
 908
 909     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 910
 911         if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
 912             (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
 913             result = o->thread_info.requested_source_latency;
 914
 915     if (result != (pa_usec_t) -1) {
 916         if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
 917             result = s->thread_info.max_latency;
 918
 919         if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
 920             result = s->thread_info.min_latency;
 921     }
 922
 923     s->thread_info.requested_latency = result;
 924     s->thread_info.requested_latency_valid = TRUE;
 925
 926     return result;
 927 }
 928
 929 /* Called from main thread */
 930 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
 931     pa_usec_t usec;
 932
 933     pa_source_assert_ref(s);
 934     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 935
 936     if (!PA_SOURCE_IS_OPENED(s->state))
 937         return 0;
 938
 939     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 940
 941     return usec;
 942 }
 943
 944 /* Called from IO thread */
 945 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
 946     pa_source_output *o;
 947     void *state = NULL;
 948
 949     pa_source_assert_ref(s);
 950
 951     if (max_rewind == s->thread_info.max_rewind)
 952         return;
 953
 954     s->thread_info.max_rewind = max_rewind;
 955
 956     if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
 957         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 958             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 959     }
 960 }
 961
 962 void pa_source_invalidate_requested_latency(pa_source *s) {
 963     pa_source_output *o;
 964     void *state = NULL;
 965
 966     pa_source_assert_ref(s);
 967
 968     s->thread_info.requested_latency_valid = FALSE;
 969
 970     if (s->update_requested_latency)
 971         s->update_requested_latency(s);
 972
 973     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 974         if (o->update_source_requested_latency)
 975             o->update_source_requested_latency(o);
 976
 977     if (s->monitor_of)
 978         pa_sink_invalidate_requested_latency(s->monitor_of);
 979 }
 980
 981 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
 982     pa_source_assert_ref(s);
 983
 984     /* min_latency == 0:           no limit
 985      * min_latency == (size_t) -1: default limit
 986      * min_latency anything else:  specified limit
 987      *
 988      * Similar for max_latency */
 989
 990     if (min_latency == (pa_usec_t) -1)
 991         min_latency = DEFAULT_MIN_LATENCY;
 992
 993     if (max_latency == (pa_usec_t) -1)
 994         max_latency = min_latency;
 995
 996     pa_assert(!min_latency || !max_latency ||
 997               min_latency <= max_latency);
 998
 999     if (PA_SOURCE_IS_LINKED(s->state)) {
1000         pa_usec_t r[2];
1001
1002         r[0] = min_latency;
1003         r[1] = max_latency;
1004
1005         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
1006     } else {
1007         s->thread_info.min_latency = min_latency;
1008         s->thread_info.max_latency = max_latency;
1009
1010         s->thread_info.requested_latency_valid = FALSE;
1011     }
1012 }
1013
1014 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
1015    pa_source_assert_ref(s);
1016    pa_assert(min_latency);
1017    pa_assert(max_latency);
1018
1019    if (PA_SOURCE_IS_LINKED(s->state)) {
1020        pa_usec_t r[2] = { 0, 0 };
1021
1022        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
1023
1024        *min_latency = r[0];
1025        *max_latency = r[1];
1026    } else {
1027        *min_latency = s->thread_info.min_latency;
1028        *max_latency = s->thread_info.max_latency;
1029    }
1030 }
1031
1032 /* Called from IO thread */
1033 void pa_source_update_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1034     pa_source_output *o;
1035     void *state = NULL;
1036
1037     pa_source_assert_ref(s);
1038
1039     s->thread_info.min_latency = min_latency;
1040     s->thread_info.max_latency = max_latency;
1041
1042     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1043         if (o->update_source_latency_range)
1044             o->update_source_latency_range(o);
1045
1046     pa_source_invalidate_requested_latency(s);
1047 }
1048
1049 size_t pa_source_get_max_rewind(pa_source *s) {
1050     size_t r;
1051     pa_source_assert_ref(s);
1052
1053     if (!PA_SOURCE_IS_LINKED(s->state))
1054         return s->thread_info.max_rewind;
1055
1056     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
1057
1058     return r;
1059 }