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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as published
  11   by the Free Software Foundation; either version 2 of the License,
  12   or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <pulse/utf8.h>
  34 #include <pulse/xmalloc.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 static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject);
  45
  46 static void source_free(pa_object *o);
  47
  48 pa_source* pa_source_new(
  49         pa_core *core,
  50         const char *driver,
  51         const char *name,
  52         int fail,
  53         const pa_sample_spec *spec,
  54         const pa_channel_map *map) {
  55
  56     pa_source *s;
  57     char st[256];
  58     pa_channel_map tmap;
  59
  60     pa_assert(core);
  61     pa_assert(name);
  62     pa_assert(spec);
  63
  64     pa_return_null_if_fail(pa_sample_spec_valid(spec));
  65
  66     if (!map)
  67         map = pa_channel_map_init_auto(&tmap, spec->channels, PA_CHANNEL_MAP_DEFAULT);
  68
  69     pa_return_null_if_fail(map && pa_channel_map_valid(map));
  70     pa_return_null_if_fail(map->channels == spec->channels);
  71     pa_return_null_if_fail(!driver || pa_utf8_valid(driver));
  72     pa_return_null_if_fail(pa_utf8_valid(name) && *name);
  73
  74     s = pa_msgobject_new(pa_source);
  75
  76     if (!(name = pa_namereg_register(core, name, PA_NAMEREG_SOURCE, s, fail))) {
  77         pa_xfree(s);
  78         return NULL;
  79     }
  80
  81     s->parent.parent.free = source_free;
  82     s->parent.process_msg = pa_source_process_msg;
  83
  84     s->core = core;
  85     s->state = PA_SOURCE_INIT;
  86     s->flags = 0;
  87     s->name = pa_xstrdup(name);
  88     s->description = NULL;
  89     s->driver = pa_xstrdup(driver);
  90     s->module = NULL;
  91
  92     s->sample_spec = *spec;
  93     s->channel_map = *map;
  94
  95     s->outputs = pa_idxset_new(NULL, NULL);
  96     s->n_corked = 0;
  97     s->monitor_of = NULL;
  98
  99     pa_cvolume_reset(&s->volume, spec->channels);
 100     s->muted = FALSE;
 101     s->refresh_volume = s->refresh_muted = FALSE;
 102
 103     s->get_latency = NULL;
 104     s->set_volume = NULL;
 105     s->get_volume = NULL;
 106     s->set_mute = NULL;
 107     s->get_mute = NULL;
 108     s->set_state = NULL;
 109     s->userdata = NULL;
 110
 111     s->asyncmsgq = NULL;
 112     s->rtpoll = NULL;
 113
 114     pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
 115
 116     pa_sample_spec_snprint(st, sizeof(st), spec);
 117     pa_log_info("Created source %u \"%s\" with sample spec \"%s\"", s->index, s->name, st);
 118
 119     s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 120     s->thread_info.soft_volume = s->volume;
 121     s->thread_info.soft_muted = s->muted;
 122     s->thread_info.state = s->state;
 123
 124     return s;
 125 }
 126
 127 void pa_source_put(pa_source *s) {
 128     pa_source_assert_ref(s);
 129
 130     pa_assert(s->state == PA_SINK_INIT);
 131     pa_assert(s->rtpoll);
 132     pa_assert(s->asyncmsgq);
 133
 134     s->thread_info.state = s->state = PA_SOURCE_IDLE;
 135
 136     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
 137     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_NEW_POST], s);
 138 }
 139
 140 static int source_set_state(pa_source *s, pa_source_state_t state) {
 141     int ret;
 142
 143     pa_assert(s);
 144
 145     if (s->state == state)
 146         return 0;
 147
 148     if (state == PA_SOURCE_SUSPENDED && !(s->flags & PA_SOURCE_CAN_SUSPEND))
 149         return -1;
 150
 151     if ((s->state == PA_SOURCE_SUSPENDED && PA_SOURCE_OPENED(state)) ||
 152         (PA_SOURCE_OPENED(s->state) && state == PA_SOURCE_SUSPENDED)) {
 153         pa_source_output *o;
 154         uint32_t idx;
 155
 156         /* We're suspending or resuming, tell everyone about it */
 157
 158         for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx)))
 159             if (o->suspend)
 160                 o->suspend(o, state == PA_SINK_SUSPENDED);
 161     }
 162
 163     if (s->set_state)
 164         if ((ret = s->set_state(s, state)) < 0)
 165             return -1;
 166
 167     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 168         return -1;
 169
 170     s->state = state;
 171
 172     if (state != PA_SOURCE_UNLINKED) /* if we enter UNLINKED state pa_source_unlink() will fire the apropriate events */
 173         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
 174     return 0;
 175 }
 176
 177 void pa_source_unlink(pa_source *s) {
 178     pa_bool_t linked;
 179     pa_source_output *o, *j = NULL;
 180
 181     pa_assert(s);
 182
 183     /* See pa_sink_unlink() for a couple of comments how this function
 184      * works. */
 185
 186     linked = PA_SOURCE_LINKED(s->state);
 187
 188     if (linked)
 189         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
 190
 191     if (s->state != PA_SOURCE_UNLINKED)
 192         pa_namereg_unregister(s->core, s->name);
 193     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 194
 195     while ((o = pa_idxset_first(s->outputs, NULL))) {
 196         pa_assert(o != j);
 197         pa_source_output_kill(o);
 198         j = o;
 199     }
 200
 201     if (linked)
 202         source_set_state(s, PA_SOURCE_UNLINKED);
 203     else
 204         s->state = PA_SOURCE_UNLINKED;
 205
 206     s->get_latency = NULL;
 207     s->get_volume = NULL;
 208     s->set_volume = NULL;
 209     s->set_mute = NULL;
 210     s->get_mute = NULL;
 211     s->set_state = NULL;
 212
 213     if (linked) {
 214         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 215         pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
 216     }
 217 }
 218
 219 static void source_free(pa_object *o) {
 220     pa_source_output *so;
 221     pa_source *s = PA_SOURCE(o);
 222
 223     pa_assert(s);
 224     pa_assert(pa_source_refcnt(s) == 0);
 225
 226     if (PA_SOURCE_LINKED(s->state))
 227         pa_source_unlink(s);
 228
 229     pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
 230
 231     pa_idxset_free(s->outputs, NULL, NULL);
 232
 233     while ((so = pa_hashmap_steal_first(s->thread_info.outputs)))
 234         pa_source_output_unref(so);
 235
 236     pa_hashmap_free(s->thread_info.outputs, NULL, NULL);
 237
 238     pa_xfree(s->name);
 239     pa_xfree(s->description);
 240     pa_xfree(s->driver);
 241     pa_xfree(s);
 242 }
 243
 244 int pa_source_update_status(pa_source*s) {
 245     pa_source_assert_ref(s);
 246     pa_assert(PA_SOURCE_LINKED(s->state));
 247
 248     if (s->state == PA_SOURCE_SUSPENDED)
 249         return 0;
 250
 251     return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 252 }
 253
 254 int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
 255     pa_source_assert_ref(s);
 256     pa_assert(PA_SOURCE_LINKED(s->state));
 257
 258     if (suspend)
 259         return source_set_state(s, PA_SOURCE_SUSPENDED);
 260     else
 261         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 262 }
 263
 264 void pa_source_ping(pa_source *s) {
 265     pa_source_assert_ref(s);
 266     pa_assert(PA_SOURCE_LINKED(s->state));
 267
 268     pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_PING, NULL, 0, NULL, NULL);
 269 }
 270
 271 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 272     pa_source_output *o;
 273     void *state = NULL;
 274
 275     pa_source_assert_ref(s);
 276     pa_assert(PA_SOURCE_OPENED(s->thread_info.state));
 277     pa_assert(chunk);
 278
 279     if (s->thread_info.state != PA_SOURCE_RUNNING)
 280         return;
 281
 282     if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
 283         pa_memchunk vchunk = *chunk;
 284
 285         pa_memblock_ref(vchunk.memblock);
 286         pa_memchunk_make_writable(&vchunk, 0);
 287
 288         if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
 289             pa_silence_memchunk(&vchunk, &s->sample_spec);
 290         else
 291             pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
 292
 293         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 294             pa_source_output_push(o, &vchunk);
 295
 296         pa_memblock_unref(vchunk.memblock);
 297     } else {
 298
 299         while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 300             pa_source_output_push(o, chunk);
 301     }
 302 }
 303
 304 pa_usec_t pa_source_get_latency(pa_source *s) {
 305     pa_usec_t usec;
 306
 307     pa_source_assert_ref(s);
 308     pa_assert(PA_SOURCE_LINKED(s->state));
 309
 310     if (!PA_SOURCE_OPENED(s->state))
 311         return 0;
 312
 313     if (s->get_latency)
 314         return s->get_latency(s);
 315
 316     if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
 317         return 0;
 318
 319     return usec;
 320 }
 321
 322 void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) {
 323     int changed;
 324
 325     pa_source_assert_ref(s);
 326     pa_assert(PA_SOURCE_LINKED(s->state));
 327     pa_assert(volume);
 328
 329     changed = !pa_cvolume_equal(volume, &s->volume);
 330     s->volume = *volume;
 331
 332     if (s->set_volume && s->set_volume(s) < 0)
 333         s->set_volume = NULL;
 334
 335     if (!s->set_volume)
 336         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
 337
 338     if (changed)
 339         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 340 }
 341
 342 const pa_cvolume *pa_source_get_volume(pa_source *s) {
 343     pa_cvolume old_volume;
 344
 345     pa_source_assert_ref(s);
 346     pa_assert(PA_SOURCE_LINKED(s->state));
 347
 348     old_volume = s->volume;
 349
 350     if (s->get_volume && s->get_volume(s) < 0)
 351         s->get_volume = NULL;
 352
 353     if (!s->get_volume && s->refresh_volume)
 354         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
 355
 356     if (!pa_cvolume_equal(&old_volume, &s->volume))
 357         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 358
 359     return &s->volume;
 360 }
 361
 362 void pa_source_set_mute(pa_source *s, pa_bool_t mute) {
 363     int changed;
 364
 365     pa_source_assert_ref(s);
 366     pa_assert(PA_SOURCE_LINKED(s->state));
 367
 368     changed = s->muted != mute;
 369     s->muted = mute;
 370
 371     if (s->set_mute && s->set_mute(s) < 0)
 372         s->set_mute = NULL;
 373
 374     if (!s->set_mute)
 375         pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 376
 377     if (changed)
 378         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 379 }
 380
 381 pa_bool_t pa_source_get_mute(pa_source *s) {
 382     pa_bool_t old_muted;
 383
 384     pa_source_assert_ref(s);
 385     pa_assert(PA_SOURCE_LINKED(s->state));
 386
 387     old_muted = s->muted;
 388
 389     if (s->get_mute && s->get_mute(s) < 0)
 390         s->get_mute = NULL;
 391
 392     if (!s->get_mute && s->refresh_muted)
 393         pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
 394
 395     if (old_muted != s->muted)
 396         pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 397
 398     return s->muted;
 399 }
 400
 401 void pa_source_set_module(pa_source *s, pa_module *m) {
 402     pa_source_assert_ref(s);
 403
 404     if (m == s->module)
 405         return;
 406
 407     s->module = m;
 408
 409     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 410 }
 411
 412 void pa_source_set_description(pa_source *s, const char *description) {
 413     pa_source_assert_ref(s);
 414
 415     if (!description && !s->description)
 416         return;
 417
 418     if (description && s->description && !strcmp(description, s->description))
 419         return;
 420
 421     pa_xfree(s->description);
 422     s->description = pa_xstrdup(description);
 423
 424     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
 425 }
 426
 427 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
 428     pa_source_assert_ref(s);
 429     pa_assert(q);
 430
 431     s->asyncmsgq = q;
 432 }
 433
 434 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
 435     pa_source_assert_ref(s);
 436     pa_assert(p);
 437
 438     s->rtpoll = p;
 439 }
 440
 441 unsigned pa_source_linked_by(pa_source *s) {
 442     pa_source_assert_ref(s);
 443     pa_assert(PA_SOURCE_LINKED(s->state));
 444
 445     return pa_idxset_size(s->outputs);
 446 }
 447
 448 unsigned pa_source_used_by(pa_source *s) {
 449     unsigned ret;
 450
 451     pa_source_assert_ref(s);
 452     pa_assert(PA_SOURCE_LINKED(s->state));
 453
 454     ret = pa_idxset_size(s->outputs);
 455     pa_assert(ret >= s->n_corked);
 456
 457     return ret - s->n_corked;
 458 }
 459
 460 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 461     pa_source *s = PA_SOURCE(object);
 462     pa_source_assert_ref(s);
 463     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 464
 465     switch ((pa_source_message_t) code) {
 466         case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
 467             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 468             pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
 469
 470             pa_assert(!o->thread_info.attached);
 471             o->thread_info.attached = TRUE;
 472
 473             if (o->attach)
 474                 o->attach(o);
 475
 476             return 0;
 477         }
 478
 479         case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
 480             pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
 481
 482             if (o->detach)
 483                 o->detach(o);
 484
 485             pa_assert(o->thread_info.attached);
 486             o->thread_info.attached = FALSE;
 487
 488             if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index)))
 489                 pa_source_output_unref(o);
 490
 491             return 0;
 492         }
 493
 494         case PA_SOURCE_MESSAGE_SET_VOLUME:
 495             s->thread_info.soft_volume = *((pa_cvolume*) userdata);
 496             return 0;
 497
 498         case PA_SOURCE_MESSAGE_SET_MUTE:
 499             s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
 500             return 0;
 501
 502         case PA_SOURCE_MESSAGE_GET_VOLUME:
 503             *((pa_cvolume*) userdata) = s->thread_info.soft_volume;
 504             return 0;
 505
 506         case PA_SOURCE_MESSAGE_GET_MUTE:
 507             *((pa_bool_t*) userdata) = s->thread_info.soft_muted;
 508             return 0;
 509
 510         case PA_SOURCE_MESSAGE_PING:
 511             return 0;
 512
 513         case PA_SOURCE_MESSAGE_SET_STATE:
 514             s->thread_info.state = PA_PTR_TO_UINT(userdata);
 515             return 0;
 516
 517         case PA_SOURCE_MESSAGE_DETACH:
 518
 519             /* We're detaching all our output streams so that the
 520              * asyncmsgq and rtpoll fields can be changed without
 521              * problems */
 522             pa_source_detach_within_thread(s);
 523             break;
 524
 525         case PA_SOURCE_MESSAGE_ATTACH:
 526
 527             /* Reattach all streams */
 528             pa_source_attach_within_thread(s);
 529             break;
 530
 531         case PA_SOURCE_MESSAGE_GET_LATENCY:
 532         case PA_SOURCE_MESSAGE_MAX:
 533             ;
 534     }
 535
 536     return -1;
 537 }
 538
 539 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) {
 540     uint32_t idx;
 541     pa_source *source;
 542     int ret = 0;
 543
 544     pa_core_assert_ref(c);
 545
 546     for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 547         ret -= pa_source_suspend(source, suspend) < 0;
 548
 549     return ret;
 550 }
 551
 552 void pa_source_detach(pa_source *s) {
 553     pa_source_assert_ref(s);
 554     pa_assert(PA_SOURCE_LINKED(s->state));
 555
 556     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL);
 557 }
 558
 559 void pa_source_attach(pa_source *s) {
 560     pa_source_assert_ref(s);
 561     pa_assert(PA_SOURCE_LINKED(s->state));
 562
 563     pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL);
 564 }
 565
 566 void pa_source_detach_within_thread(pa_source *s) {
 567     pa_source_output *o;
 568     void *state = NULL;
 569
 570     pa_source_assert_ref(s);
 571     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 572
 573     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 574         if (o->detach)
 575             o->detach(o);
 576 }
 577
 578 void pa_source_attach_within_thread(pa_source *s) {
 579     pa_source_output *o;
 580     void *state = NULL;
 581
 582     pa_source_assert_ref(s);
 583     pa_assert(PA_SOURCE_LINKED(s->thread_info.state));
 584
 585     while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
 586         if (o->attach)
 587             o->attach(o);
 588
 589 }