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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <pulse/utf8.h>
  32 #include <pulse/xmalloc.h>
  33 #include <pulse/timeval.h>
  34 #include <pulse/util.h>
  35
  36 #include <pulsecore/source-output.h>
  37 #include <pulsecore/namereg.h>
  38 #include <pulsecore/core-subscribe.h>
  39 #include <pulsecore/log.h>
  40 #include <pulsecore/sample-util.h>
  41
  42 #include "source.h"
  43
  44 #define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
  45
  46 static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
  47
  48 static void source_free(pa_object *o);
  49
  50 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
  51     pa_assert(data);
  52
  53     memset(data, 0, sizeof(*data));
  54     data->proplist = pa_proplist_new();
  55
  56     return data;
  57 }
  58
  59 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
  60     pa_assert(data);
  61
  62     pa_xfree(data->name);
  63     data->name = pa_xstrdup(name);
  64 }
  65
  66 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
  67     pa_assert(data);
  68
  69     if ((data->sample_spec_is_set = !!spec))
  70         data->sample_spec = *spec;
  71 }
  72
  73 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
  74     pa_assert(data);
  75
  76     if ((data->channel_map_is_set = !!map))
  77         data->channel_map = *map;
  78 }
  79
  80 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
  81     pa_assert(data);
  82
  83     if ((data->volume_is_set = !!volume))
  84         data->volume = *volume;
  85 }
  86
  87 void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) {
  88     pa_assert(data);
  89
  90     data->muted_is_set = TRUE;
  91     data->muted = !!mute;
  92 }
  93
  94 void pa_source_new_data_done(pa_source_new_data *data) {
  95     pa_assert(data);
  96
  97     pa_xfree(data->name);
  98     pa_proplist_free(data->proplist);
  99 }
 100
 101 /* Called from main context */
 102 static void reset_callbacks(pa_source *s) {
 103     pa_assert(s);
 104
 105     s->set_state = NULL;
 106     s->get_volume = NULL;
 107     s->set_volume = NULL;
 108     s->get_mute = NULL;
 109     s->set_mute = NULL;
 110     s->update_requested_latency = NULL;
 111 }
 112
 113 /* Called from main context */
 114 pa_source* pa_source_new(
 115         pa_core *core,
 116         pa_source_new_data *data,
 117         pa_source_flags_t flags) {
 118
 119     pa_source *s;
 120     const char *name;
 121     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 122     char *pt;
 123
 124     pa_assert(core);
 125     pa_assert(data);
 126     pa_assert(data->name);
 127
 128     s = pa_msgobject_new(pa_source);
 129
 130     if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
 131         pa_xfree(s);
 132         return NULL;
 133     }
 134
 135     pa_source_new_data_set_name(data, name);
 136
 137     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
 138         pa_xfree(s);
 139         pa_namereg_unregister(core, name);
 140         return NULL;
 141     }
 142
 143     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 144     pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
 145
 146     pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
 147
 148     if (!data->channel_map_is_set)
 149         pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 150
 151     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 152     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 153
 154     if (!data->volume_is_set)
 155         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 156
 157     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 158     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 159
 160     if (!data->muted_is_set)
 161         data->muted = FALSE;
 162
 163     if (data->card)
 164         pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->card->proplist);
 165
 166     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
 167         pa_xfree(s);
 168         pa_namereg_unregister(core, name);
 169         return NULL;
 170     }
 171
 172     s->parent.parent.free = source_free;
 173     s->parent.process_msg = pa_source_process_msg;
 174
 175     s->core = core;
 176     s->state = PA_SOURCE_INIT;
 177     s->flags = flags;
 178     s->name = pa_xstrdup(name);
 179     s->proplist = pa_proplist_copy(data->proplist);
 180     s->driver = pa_xstrdup(pa_path_get_filename(data->driver));
 181     s->module = data->module;
 182     s->card = data->card;
 183
 184     s->sample_spec = data->sample_spec;
 185     s->channel_map = data->channel_map;
 186
 187     s->outputs = pa_idxset_new(NULL, NULL);
 188     s->n_corked = 0;
 189     s->monitor_of = NULL;
 190
 191     s->virtual_volume = data->volume;
 192     pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
 193     s->base_volume = PA_VOLUME_NORM;
 194     s->n_volume_steps = PA_VOLUME_NORM+1;
 195     s->muted = data->muted;
 196     s->refresh_volume = s->refresh_muted = FALSE;
 197
 198     reset_callbacks(s);
 199     s->userdata = NULL;
 200
 201     s->asyncmsgq = NULL;
 202     s->rtpoll = NULL;
 203
 204     pa_silence_memchunk_get(
 205             &core->silence_cache,
 206             core->mempool,
 207             &s->silence,
 208             &s->sample_spec,
 209             0);
 210
 211     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 212     s->thread_info.soft_volume = s->soft_volume;
 213     s->thread_info.soft_muted = s->muted;
 214     s->thread_info.state = s->state;
 215     s->thread_info.max_rewind = 0;
 216     s->thread_info.requested_latency_valid = FALSE;
 217     s->thread_info.requested_latency = 0;
 218     s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
 219     s->thread_info.max_latency = 0;
 220
 221     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 222
 223     if (s->card)
 224         pa_assert_se(pa_idxset_put(s->card->sources, s, NULL) >= 0);
 225
 226     pt = pa_proplist_to_string_sep(s->proplist, "\n    ");
 227     pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s\n    %s",
 228                 s->index,
 229                 s->name,
 230                 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
 231                 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map),
 232                 pt);
 233     pa_xfree(pt);
 234
 235     return s;
 236 }
 237
 238 /* Called from main context */
 239 static int source_set_state(pa_source *s, pa_source_state_t state) {
 240     int ret;
 241     pa_bool_t suspend_change;
 242     pa_source_state_t original_state;
 243
 244     pa_assert(s);
 245
 246     if (s->state == state)
 247         return 0;
 248
 249     original_state = s->state;
 250
 251     suspend_change =
 252         (original_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) ||
 253         (PA_SOURCE_IS_OPENED(original_state) && state == PA_SOURCE_SUSPENDED);
 254
 255     if (s->set_state)
 256         if ((ret = s->set_state(s, state)) < 0)
 257             return ret;
 258
 259     if (s->asyncmsgq)
 260         if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
 261
 262             if (s->set_state)
 263                 s->set_state(s, original_state);
 264
 265             return ret;
 266         }
 267
 268     s->state = state;
 269
 270     if (state != PA_SOURCE_UNLINKED) { /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 271         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 272         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 273     }
 274
 275     if (suspend_change) {
 276         pa_source_output *o;
 277         uint32_t idx;
 278
 279         /* We're suspending or resuming, tell everyone about it */
 280
 281         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 282             if (s->state == PA_SOURCE_SUSPENDED &&
 283                 (o->flags & PA_SOURCE_OUTPUT_FAIL_ON_SUSPEND))
 284                 pa_source_output_kill(o);
 285             else if (o->suspend)
 286                 o->suspend(o, state == PA_SOURCE_SUSPENDED);
 287     }
 288
 289
 290     return 0;
 291 }
 292
 293 /* Called from main context */
 294 void pa_source_put(pa_source *s) {
 295     pa_source_assert_ref(s);
 296
 297     pa_assert(s->state == PA_SOURCE_INIT);
 298
 299     /* The following fields must be initialized properly when calling _put() */
 300     pa_assert(s->asyncmsgq);
 301     pa_assert(s->rtpoll);
 302     pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
 303               s->thread_info.min_latency <= s->thread_info.max_latency);
 304
 305     if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL)) {
 306         s->flags |= PA_SOURCE_DECIBEL_VOLUME;
 307
 308         s->thread_info.soft_volume = s->soft_volume;
 309         s->thread_info.soft_muted = s->muted;
 310     }
 311
 312     if (s->flags & PA_SOURCE_DECIBEL_VOLUME)
 313         s->n_volume_steps = PA_VOLUME_NORM+1;
 314
 315     pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
 316
 317     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 318     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
 319 }
 320
 321 /* Called from main context */
 322 void pa_source_unlink(pa_source *s) {
 323     pa_bool_t linked;
 324     pa_source_output *o, *j = NULL;
 325
 326     pa_assert(s);
 327
 328     /* See pa_sink_unlink() for a couple of comments how this function
 329      * works. */
 330
 331     linked = PA_SOURCE_IS_LINKED(s->state);
 332
 333     if (linked)
 334         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 335
 336     if (s->state != PA_SOURCE_UNLINKED)
 337         pa_namereg_unregister(s->core, s->name);
 338     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 339
 340     if (s->card)
 341         pa_idxset_remove_by_data(s->card->sources, s, NULL);
 342
 343     while ((o = pa_idxset_first(s->outputs, NULL))) {
 344         pa_assert(o != j);
 345         pa_source_output_kill(o);
 346         j = o;
 347     }
 348
 349     if (linked)
 350         source_set_state(s, PA_SOURCE_UNLINKED);
 351     else
 352         s->state = PA_SOURCE_UNLINKED;
 353
 354     reset_callbacks(s);
 355
 356     if (linked) {
 357         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 358         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 359     }
 360 }
 361
 362 /* Called from main context */
 363 static void source_free(pa_object *o) {
 364     pa_source_output *so;
 365     pa_source *s = PA_SOURCE(o);
 366
 367     pa_assert(s);
 368     pa_assert(pa_source_refcnt(s) == 0);
 369
 370     if (PA_SOURCE_IS_LINKED(s->state))
 371         pa_source_unlink(s);
 372
 373     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 374
 375     pa_idxset_free(s->outputs, NULL, NULL);
 376
 377     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 378         pa_source_output_unref(so);
 379
 380     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 381
 382     if (s->silence.memblock)
 383         pa_memblock_unref(s->silence.memblock);
 384
 385     pa_xfree(s->name);
 386     pa_xfree(s->driver);
 387
 388     if (s->proplist)
 389         pa_proplist_free(s->proplist);
 390
 391     pa_xfree(s);
 392 }
 393
 394 /* Called from main context */
 395 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 396     pa_source_assert_ref(s);
 397
 398     s->asyncmsgq = q;
 399 }
 400
 401 /* Called from main context */
 402 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 403     pa_source_assert_ref(s);
 404
 405     s->rtpoll = p;
 406 }
 407
 408 /* Called from main context */
 409 int pa_source_update_status(pa_source*s) {
 410     pa_source_assert_ref(s);
 411     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 412
 413     if (s->state == PA_SOURCE_SUSPENDED)
 414         return 0;
 415
 416     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 417 }
 418
 419 /* Called from main context */
 420 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 421     pa_source_assert_ref(s);
 422     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 423
 424     if (suspend)
 425         return source_set_state(s, PA_SOURCE_SUSPENDED);
 426     else
 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 pa_queue *pa_source_move_all_start(pa_source *s) {
 432     pa_queue *q;
 433     pa_source_output *o, *n;
 434     uint32_t idx;
 435
 436     pa_source_assert_ref(s);
 437     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 438
 439     q = pa_queue_new();
 440
 441     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = n) {
 442         n = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx));
 443
 444         if (pa_source_output_start_move(o) >= 0)
 445             pa_queue_push(q, pa_source_output_ref(o));
 446     }
 447
 448     return q;
 449 }
 450
 451 /* Called from main context */
 452 void pa_source_move_all_finish(pa_source *s, pa_queue *q, pa_bool_t save) {
 453     pa_source_output *o;
 454
 455     pa_source_assert_ref(s);
 456     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 457     pa_assert(q);
 458
 459     while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
 460         if (pa_source_output_finish_move(o, s, save) < 0)
 461             pa_source_output_kill(o);
 462
 463         pa_source_output_unref(o);
 464     }
 465
 466     pa_queue_free(q, NULL, NULL);
 467 }
 468
 469 /* Called from main context */
 470 void pa_source_move_all_fail(pa_queue *q) {
 471     pa_source_output *o;
 472     pa_assert(q);
 473
 474     while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
 475         if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FAIL], o) == PA_HOOK_OK) {
 476             pa_source_output_kill(o);
 477             pa_source_output_unref(o);
 478         }
 479     }
 480
 481     pa_queue_free(q, NULL, NULL);
 482 }
 483
 484 /* Called from IO thread context */
 485 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
 486     pa_source_output *o;
 487     void *state = NULL;
 488
 489     pa_source_assert_ref(s);
 490     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 491
 492     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 493         return;
 494
 495     if (nbytes <= 0)
 496         return;
 497
 498     pa_log_debug("Processing rewind...");
 499
 500     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 501         pa_source_output_assert_ref(o);
 502         pa_source_output_process_rewind(o, nbytes);
 503     }
 504 }
 505
 506 /* Called from IO thread context */
 507 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 508     pa_source_output *o;
 509     void *state = NULL;
 510
 511     pa_source_assert_ref(s);
 512     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 513     pa_assert(chunk);
 514
 515     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 516         return;
 517
 518     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 519         pa_memchunk vchunk = *chunk;
 520
 521         pa_memblock_ref(vchunk.memblock);
 522         pa_memchunk_make_writable(&vchunk, 0);
 523
 524         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 525             pa_silence_memchunk(&vchunk, &s->sample_spec);
 526         else
 527             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 528
 529         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 530             pa_source_output_assert_ref(o);
 531
 532             if (!o->thread_info.direct_on_input)
 533                 pa_source_output_push(o, &vchunk);
 534         }
 535
 536         pa_memblock_unref(vchunk.memblock);
 537     } else {
 538
 539         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
 540             pa_source_output_assert_ref(o);
 541
 542             if (!o->thread_info.direct_on_input)
 543                 pa_source_output_push(o, chunk);
 544         }
 545     }
 546 }
 547
 548 /* Called from IO thread context */
 549 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
 550     pa_source_assert_ref(s);
 551     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 552     pa_source_output_assert_ref(o);
 553     pa_assert(o->thread_info.direct_on_input);
 554     pa_assert(chunk);
 555
 556     if (s->thread_info.state == PA_SOURCE_SUSPENDED)
 557         return;
 558
 559     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 560         pa_memchunk vchunk = *chunk;
 561
 562         pa_memblock_ref(vchunk.memblock);
 563         pa_memchunk_make_writable(&vchunk, 0);
 564
 565         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 566             pa_silence_memchunk(&vchunk, &s->sample_spec);
 567         else
 568             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 569
 570         pa_source_output_push(o, &vchunk);
 571
 572         pa_memblock_unref(vchunk.memblock);
 573     } else
 574         pa_source_output_push(o, chunk);
 575 }
 576
 577 /* Called from main thread */
 578 pa_usec_t pa_source_get_latency(pa_source *s) {
 579     pa_usec_t usec;
 580
 581     pa_source_assert_ref(s);
 582     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 583
 584     if (s->state == PA_SOURCE_SUSPENDED)
 585         return 0;
 586
 587     if (!(s->flags & PA_SOURCE_LATENCY))
 588         return 0;
 589
 590     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
 591
 592     return usec;
 593 }
 594
 595 /* Called from main thread */
 596 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 597     pa_cvolume old_virtual_volume;
 598     pa_bool_t virtual_volume_changed;
 599
 600     pa_source_assert_ref(s);
 601     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 602     pa_assert(volume);
 603     pa_assert(pa_cvolume_valid(volume));
 604     pa_assert(pa_cvolume_compatible(volume, &s->sample_spec));
 605
 606     old_virtual_volume = s->virtual_volume;
 607     s->virtual_volume = *volume;
 608     virtual_volume_changed = !pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume);
 609
 610     if (s->set_volume) {
 611         pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
 612         s->set_volume(s);
 613     } else
 614         s->soft_volume = s->virtual_volume;
 615
 616     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
 617
 618     if (virtual_volume_changed)
 619         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 620 }
 621
 622 /* Called from main thread. Only to be called by source implementor */
 623 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
 624     pa_source_assert_ref(s);
 625     pa_assert(volume);
 626
 627     if (PA_SOURCE_IS_LINKED(s->state))
 628         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
 629     else
 630         s->thread_info.soft_volume = *volume;
 631 }
 632
 633 /* Called from main thread */
 634 const pa_cvolume *pa_source_get_volume(pa_source *s, pa_bool_t force_refresh) {
 635     pa_source_assert_ref(s);
 636     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 637
 638     if (s->refresh_volume || force_refresh) {
 639         pa_cvolume old_virtual_volume = s->virtual_volume;
 640
 641         if (s->get_volume)
 642             s->get_volume(s);
 643
 644         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, NULL, 0, NULL) == 0);
 645
 646         if (!pa_cvolume_equal(&old_virtual_volume, &s->virtual_volume))
 647             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 648     }
 649
 650     return &s->virtual_volume;
 651 }
 652
 653 /* Called from main thread */
 654 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 655     pa_bool_t old_muted;
 656
 657     pa_source_assert_ref(s);
 658     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 659
 660     old_muted = s->muted;
 661     s->muted = mute;
 662
 663     if (s->set_mute)
 664         s->set_mute(s);
 665
 666     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
 667
 668     if (old_muted != s->muted)
 669         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 670 }
 671
 672 /* Called from main thread */
 673 pa_bool_t pa_source_get_mute(pa_source *s, pa_bool_t force_refresh) {
 674
 675     pa_source_assert_ref(s);
 676     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 677
 678     if (s->refresh_muted || force_refresh) {
 679         pa_bool_t old_muted = s->muted;
 680
 681         if (s->get_mute)
 682             s->get_mute(s);
 683
 684         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, NULL, 0, NULL) == 0);
 685
 686         if (old_muted != s->muted)
 687             pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 688     }
 689
 690     return s->muted;
 691 }
 692
 693 /* Called from main thread */
 694 pa_bool_t pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
 695     pa_source_assert_ref(s);
 696     pa_assert(p);
 697
 698     pa_proplist_update(s->proplist, mode, p);
 699
 700     if (PA_SOURCE_IS_LINKED(s->state)) {
 701         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 702         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 703     }
 704
 705     return TRUE;
 706 }
 707
 708 /* Called from main thread */
 709 void pa_source_set_description(pa_source *s, const char *description) {
 710     const char *old;
 711     pa_source_assert_ref(s);
 712
 713     if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
 714         return;
 715
 716     old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 717
 718     if (old && description && !strcmp(old, description))
 719         return;
 720
 721     if (description)
 722         pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
 723     else
 724         pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
 725
 726     if (PA_SOURCE_IS_LINKED(s->state)) {
 727         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 728         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
 729     }
 730 }
 731
 732 /* Called from main thread */
 733 unsigned pa_source_linked_by(pa_source *s) {
 734     pa_source_assert_ref(s);
 735     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 736
 737     return pa_idxset_size(s->outputs);
 738 }
 739
 740 /* Called from main thread */
 741 unsigned pa_source_used_by(pa_source *s) {
 742     unsigned ret;
 743
 744     pa_source_assert_ref(s);
 745     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 746
 747     ret = pa_idxset_size(s->outputs);
 748     pa_assert(ret >= s->n_corked);
 749
 750     return ret - s->n_corked;
 751 }
 752
 753 /* Called from main thread */
 754 unsigned pa_source_check_suspend(pa_source *s) {
 755     unsigned ret;
 756     pa_source_output *o;
 757     uint32_t idx;
 758
 759     pa_source_assert_ref(s);
 760
 761     if (!PA_SOURCE_IS_LINKED(s->state))
 762         return 0;
 763
 764     ret = 0;
 765
 766     for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx))) {
 767         pa_source_output_state_t st;
 768
 769         st = pa_source_output_get_state(o);
 770         pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(st));
 771
 772         if (st == PA_SOURCE_OUTPUT_CORKED)
 773             continue;
 774
 775         if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
 776             continue;
 777
 778         ret ++;
 779     }
 780
 781     return ret;
 782 }
 783
 784 /* Called from IO thread, except when it is not */
 785 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 786     pa_source *s = PA_SOURCE(object);
 787     pa_source_assert_ref(s);
 788
 789     switch ((pa_source_message_t) code) {
 790
 791         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 792             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 793
 794             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 795
 796             if (o->direct_on_input) {
 797                 o->thread_info.direct_on_input = o->direct_on_input;
 798                 pa_hashmap_put(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index), o);
 799             }
 800
 801             pa_assert(!o->thread_info.attached);
 802             o->thread_info.attached = TRUE;
 803
 804             if (o->attach)
 805                 o->attach(o);
 806
 807             pa_source_output_set_state_within_thread(o, o->state);
 808
 809             if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
 810                 pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 811
 812             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
 813
 814             /* We don't just invalidate the requested latency here,
 815              * because if we are in a move we might need to fix up the
 816              * requested latency. */
 817             pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
 818
 819             return 0;
 820         }
 821
 822         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 823             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 824
 825             pa_source_output_set_state_within_thread(o, o->state);
 826
 827             if (o->detach)
 828                 o->detach(o);
 829
 830             pa_assert(o->thread_info.attached);
 831             o->thread_info.attached = FALSE;
 832
 833             if (o->thread_info.direct_on_input) {
 834                 pa_hashmap_remove(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index));
 835                 o->thread_info.direct_on_input = NULL;
 836             }
 837
 838             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 839                 pa_source_output_unref(o);
 840
 841             pa_source_invalidate_requested_latency(s);
 842
 843             return 0;
 844         }
 845
 846         case PA_SOURCE_MESSAGE_SET_VOLUME:
 847             s->thread_info.soft_volume = s->soft_volume;
 848             return 0;
 849
 850         case PA_SOURCE_MESSAGE_GET_VOLUME:
 851             return 0;
 852
 853         case PA_SOURCE_MESSAGE_SET_MUTE:
 854             s->thread_info.soft_muted = s->muted;
 855             return 0;
 856
 857         case PA_SOURCE_MESSAGE_GET_MUTE:
 858             return 0;
 859
 860         case PA_SOURCE_MESSAGE_SET_STATE:
 861             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 862             return 0;
 863
 864         case PA_SOURCE_MESSAGE_DETACH:
 865
 866             /* Detach all streams */
 867             pa_source_detach_within_thread(s);
 868             return 0;
 869
 870         case PA_SOURCE_MESSAGE_ATTACH:
 871
 872             /* Reattach all streams */
 873             pa_source_attach_within_thread(s);
 874             return 0;
 875
 876         case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
 877
 878             pa_usec_t *usec = userdata;
 879             *usec = pa_source_get_requested_latency_within_thread(s);
 880
 881             if (*usec == (pa_usec_t) -1)
 882                 *usec = s->thread_info.max_latency;
 883
 884             return 0;
 885         }
 886
 887         case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
 888             pa_usec_t *r = userdata;
 889
 890             pa_source_update_latency_range(s, r[0], r[1]);
 891
 892             return 0;
 893         }
 894
 895         case PA_SOURCE_MESSAGE_GET_LATENCY_RANGE: {
 896             pa_usec_t *r = userdata;
 897
 898             r[0] = s->thread_info.min_latency;
 899             r[1] = s->thread_info.max_latency;
 900
 901             return 0;
 902         }
 903
 904         case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
 905
 906             *((size_t*) userdata) = s->thread_info.max_rewind;
 907             return 0;
 908
 909         case PA_SOURCE_MESSAGE_GET_LATENCY:
 910
 911             if (s->monitor_of) {
 912                 *((pa_usec_t*) userdata) = 0;
 913                 return 0;
 914             }
 915
 916             /* Implementors need to overwrite this implementation! */
 917             return -1;
 918
 919         case PA_SOURCE_MESSAGE_MAX:
 920             ;
 921     }
 922
 923     return -1;
 924 }
 925
 926 /* Called from main thread */
 927 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 928     uint32_t idx;
 929     pa_source *source;
 930     int ret = 0;
 931
 932     pa_core_assert_ref(c);
 933
 934     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 935         ret -= pa_source_suspend(source, suspend) < 0;
 936
 937     return ret;
 938 }
 939
 940 /* Called from main thread */
 941 void pa_source_detach(pa_source *s) {
 942     pa_source_assert_ref(s);
 943     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 944
 945     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL) == 0);
 946 }
 947
 948 /* Called from main thread */
 949 void pa_source_attach(pa_source *s) {
 950     pa_source_assert_ref(s);
 951     pa_assert(PA_SOURCE_IS_LINKED(s->state));
 952
 953     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
 954 }
 955
 956 /* Called from IO thread */
 957 void pa_source_detach_within_thread(pa_source *s) {
 958     pa_source_output *o;
 959     void *state = NULL;
 960
 961     pa_source_assert_ref(s);
 962     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 963
 964     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 965         if (o->detach)
 966             o->detach(o);
 967 }
 968
 969 /* Called from IO thread */
 970 void pa_source_attach_within_thread(pa_source *s) {
 971     pa_source_output *o;
 972     void *state = NULL;
 973
 974     pa_source_assert_ref(s);
 975     pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
 976
 977     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 978         if (o->attach)
 979             o->attach(o);
 980 }
 981
 982 /* Called from IO thread */
 983 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
 984     pa_usec_t result = (pa_usec_t) -1;
 985     pa_source_output *o;
 986     void *state = NULL;
 987
 988     pa_source_assert_ref(s);
 989
 990     if (s->thread_info.requested_latency_valid)
 991         return s->thread_info.requested_latency;
 992
 993     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 994
 995         if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
 996             (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
 997             result = o->thread_info.requested_source_latency;
 998
 999     if (result != (pa_usec_t) -1) {
1000         if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
1001             result = s->thread_info.max_latency;
1002
1003         if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
1004             result = s->thread_info.min_latency;
1005     }
1006
1007     s->thread_info.requested_latency = result;
1008     s->thread_info.requested_latency_valid = TRUE;
1009
1010     return result;
1011 }
1012
1013 /* Called from main thread */
1014 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
1015     pa_usec_t usec;
1016
1017     pa_source_assert_ref(s);
1018     pa_assert(PA_SOURCE_IS_LINKED(s->state));
1019
1020     if (s->state == PA_SOURCE_SUSPENDED)
1021         return 0;
1022
1023     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
1024
1025     return usec;
1026 }
1027
1028 /* Called from IO thread */
1029 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
1030     pa_source_output *o;
1031     void *state = NULL;
1032
1033     pa_source_assert_ref(s);
1034
1035     if (max_rewind == s->thread_info.max_rewind)
1036         return;
1037
1038     s->thread_info.max_rewind = max_rewind;
1039
1040     if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
1041         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1042             pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
1043     }
1044 }
1045
1046 void pa_source_invalidate_requested_latency(pa_source *s) {
1047     pa_source_output *o;
1048     void *state = NULL;
1049
1050     pa_source_assert_ref(s);
1051
1052     s->thread_info.requested_latency_valid = FALSE;
1053
1054     if (s->update_requested_latency)
1055         s->update_requested_latency(s);
1056
1057     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1058         if (o->update_source_requested_latency)
1059             o->update_source_requested_latency(o);
1060
1061     if (s->monitor_of)
1062         pa_sink_invalidate_requested_latency(s->monitor_of);
1063 }
1064
1065 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1066     pa_source_assert_ref(s);
1067
1068     /* min_latency == 0:           no limit
1069      * min_latency == (size_t) -1: default limit
1070      * min_latency anything else:  specified limit
1071      *
1072      * Similar for max_latency */
1073
1074     if (min_latency == (pa_usec_t) -1)
1075         min_latency = DEFAULT_MIN_LATENCY;
1076
1077     if (max_latency == (pa_usec_t) -1)
1078         max_latency = min_latency;
1079
1080     pa_assert(!min_latency || !max_latency ||
1081               min_latency <= max_latency);
1082
1083     if (PA_SOURCE_IS_LINKED(s->state)) {
1084         pa_usec_t r[2];
1085
1086         r[0] = min_latency;
1087         r[1] = max_latency;
1088
1089         pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
1090     } else {
1091         s->thread_info.min_latency = min_latency;
1092         s->thread_info.max_latency = max_latency;
1093
1094         s->thread_info.requested_latency_valid = FALSE;
1095     }
1096 }
1097
1098 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
1099    pa_source_assert_ref(s);
1100    pa_assert(min_latency);
1101    pa_assert(max_latency);
1102
1103    if (PA_SOURCE_IS_LINKED(s->state)) {
1104        pa_usec_t r[2] = { 0, 0 };
1105
1106        pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
1107
1108        *min_latency = r[0];
1109        *max_latency = r[1];
1110    } else {
1111        *min_latency = s->thread_info.min_latency;
1112        *max_latency = s->thread_info.max_latency;
1113    }
1114 }
1115
1116 /* Called from IO thread */
1117 void pa_source_update_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
1118     pa_source_output *o;
1119     void *state = NULL;
1120
1121     pa_source_assert_ref(s);
1122
1123     s->thread_info.min_latency = min_latency;
1124     s->thread_info.max_latency = max_latency;
1125
1126     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
1127         if (o->update_source_latency_range)
1128             o->update_source_latency_range(o);
1129
1130     pa_source_invalidate_requested_latency(s);
1131 }
1132
1133 size_t pa_source_get_max_rewind(pa_source *s) {
1134     size_t r;
1135     pa_source_assert_ref(s);
1136
1137     if (!PA_SOURCE_IS_LINKED(s->state))
1138         return s->thread_info.max_rewind;
1139
1140     pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
1141
1142     return r;
1143 }