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