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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include <pulse/utf8.h>
  31 #include <pulse/xmalloc.h>
  32
  33 #include <pulsecore/sample-util.h>
  34 #include <pulsecore/core-subscribe.h>
  35 #include <pulsecore/log.h>
  36 #include <pulsecore/namereg.h>
  37 #include <pulsecore/core-util.h>
  38
  39 #include "source-output.h"
  40
  41 #define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
  42
  43 static PA_DEFINE_CHECK_TYPE(pa_source_output, pa_msgobject);
  44
  45 static void source_output_free(pa_object* mo);
  46
  47 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
  48     pa_assert(data);
  49
  50     memset(data, 0, sizeof(*data));
  51     data->resample_method = PA_RESAMPLER_INVALID;
  52     data->proplist = pa_proplist_new();
  53
  54     return data;
  55 }
  56
  57 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
  58     pa_assert(data);
  59
  60     if ((data->sample_spec_is_set = !!spec))
  61         data->sample_spec = *spec;
  62 }
  63
  64 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
  65     pa_assert(data);
  66
  67     if ((data->channel_map_is_set = !!map))
  68         data->channel_map = *map;
  69 }
  70
  71 void pa_source_output_new_data_done(pa_source_output_new_data *data) {
  72     pa_assert(data);
  73
  74     pa_proplist_free(data->proplist);
  75 }
  76
  77 /* Called from main context */
  78 static void reset_callbacks(pa_source_output *o) {
  79     pa_assert(o);
  80
  81     o->push = NULL;
  82     o->process_rewind = NULL;
  83     o->update_max_rewind = NULL;
  84     o->update_source_requested_latency = NULL;
  85     o->update_source_latency_range = NULL;
  86     o->attach = NULL;
  87     o->detach = NULL;
  88     o->suspend = NULL;
  89     o->moved = NULL;
  90     o->kill = NULL;
  91     o->get_latency = NULL;
  92     o->state_change = NULL;
  93     o->may_move_to = NULL;
  94 }
  95
  96 /* Called from main context */
  97 pa_source_output* pa_source_output_new(
  98         pa_core *core,
  99         pa_source_output_new_data *data,
 100         pa_source_output_flags_t flags) {
 101
 102     pa_source_output *o;
 103     pa_resampler *resampler = NULL;
 104     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 105
 106     pa_assert(core);
 107     pa_assert(data);
 108
 109     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data) < 0)
 110         return NULL;
 111
 112     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 113
 114     if (!data->source)
 115         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, TRUE);
 116
 117     pa_return_null_if_fail(data->source);
 118     pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
 119
 120     pa_return_null_if_fail(!data->direct_on_input || data->direct_on_input->sink == data->source->monitor_of);
 121
 122     if (!data->sample_spec_is_set)
 123         data->sample_spec = data->source->sample_spec;
 124
 125     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
 126
 127     if (!data->channel_map_is_set) {
 128         if (pa_channel_map_compatible(&data->source->channel_map, &data->sample_spec))
 129             data->channel_map = data->source->channel_map;
 130         else
 131             pa_channel_map_init_extend(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 132     }
 133
 134     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 135     pa_return_null_if_fail(pa_channel_map_compatible(&data->channel_map, &data->sample_spec));
 136
 137     if (flags & PA_SOURCE_OUTPUT_FIX_FORMAT)
 138         data->sample_spec.format = data->source->sample_spec.format;
 139
 140     if (flags & PA_SOURCE_OUTPUT_FIX_RATE)
 141         data->sample_spec.rate = data->source->sample_spec.rate;
 142
 143     if (flags & PA_SOURCE_OUTPUT_FIX_CHANNELS) {
 144         data->sample_spec.channels = data->source->sample_spec.channels;
 145         data->channel_map = data->source->channel_map;
 146     }
 147
 148     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 149     pa_assert(pa_channel_map_valid(&data->channel_map));
 150
 151     if (data->resample_method == PA_RESAMPLER_INVALID)
 152         data->resample_method = core->resample_method;
 153
 154     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 155
 156     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data) < 0)
 157         return NULL;
 158
 159     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 160         pa_log("Failed to create source output: too many outputs per source.");
 161         return NULL;
 162     }
 163
 164     if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 165         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 166         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 167
 168         if (!(resampler = pa_resampler_new(
 169                       core->mempool,
 170                       &data->source->sample_spec, &data->source->channel_map,
 171                       &data->sample_spec, &data->channel_map,
 172                       data->resample_method,
 173                       ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 174                       ((flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 175                       (core->disable_remixing || (flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0) |
 176                       (core->disable_lfe_remixing ? PA_RESAMPLER_NO_LFE : 0)))) {
 177             pa_log_warn("Unsupported resampling operation.");
 178             return NULL;
 179         }
 180
 181         data->resample_method = pa_resampler_get_method(resampler);
 182     }
 183
 184     o = pa_msgobject_new(pa_source_output);
 185     o->parent.parent.free = source_output_free;
 186     o->parent.process_msg = pa_source_output_process_msg;
 187
 188     o->core = core;
 189     o->state = PA_SOURCE_OUTPUT_INIT;
 190     o->flags = flags;
 191     o->proplist = pa_proplist_copy(data->proplist);
 192     o->driver = pa_xstrdup(data->driver);
 193     o->module = data->module;
 194     o->source = data->source;
 195     o->client = data->client;
 196
 197     o->resample_method = data->resample_method;
 198     o->sample_spec = data->sample_spec;
 199     o->channel_map = data->channel_map;
 200
 201     o->direct_on_input = data->direct_on_input;
 202
 203     reset_callbacks(o);
 204     o->userdata = NULL;
 205
 206     o->thread_info.state = o->state;
 207     o->thread_info.attached = FALSE;
 208     o->thread_info.sample_spec = o->sample_spec;
 209     o->thread_info.resampler = resampler;
 210     o->thread_info.requested_source_latency = (pa_usec_t) -1;
 211     o->thread_info.direct_on_input = o->direct_on_input;
 212
 213     o->thread_info.delay_memblockq = pa_memblockq_new(
 214             0,
 215             MEMBLOCKQ_MAXLENGTH,
 216             0,
 217             pa_frame_size(&o->source->sample_spec),
 218             0,
 219             1,
 220             0,
 221             &o->source->silence);
 222
 223     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 224     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 225
 226     if (o->client)
 227         pa_assert_se(pa_idxset_put(o->client->source_outputs, o, NULL) >= 0);
 228
 229     if (o->direct_on_input)
 230         pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
 231
 232     pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s",
 233                 o->index,
 234                 pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)),
 235                 o->source->name,
 236                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
 237                 pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map));
 238
 239     /* Don't forget to call pa_source_output_put! */
 240
 241     return o;
 242 }
 243
 244 /* Called from main context */
 245 static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
 246     pa_assert(o);
 247
 248     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 249         pa_assert_se(o->source->n_corked -- >= 1);
 250     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 251         o->source->n_corked++;
 252
 253 }
 254
 255 /* Called from main context */
 256 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 257     pa_assert(o);
 258
 259     if (o->state == state)
 260         return 0;
 261
 262     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
 263
 264     update_n_corked(o, state);
 265     o->state = state;
 266
 267     if (state != PA_SOURCE_OUTPUT_UNLINKED)
 268         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 269
 270     pa_source_update_status(o->source);
 271
 272     return 0;
 273 }
 274
 275 /* Called from main context */
 276 void pa_source_output_unlink(pa_source_output*o) {
 277     pa_bool_t linked;
 278     pa_assert(o);
 279
 280     /* See pa_sink_unlink() for a couple of comments how this function
 281      * works */
 282
 283     pa_source_output_ref(o);
 284
 285     linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
 286
 287     if (linked)
 288         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 289
 290     if (o->direct_on_input)
 291         pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
 292     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 293     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 294         pa_source_output_unref(o);
 295
 296     if (o->client)
 297         pa_idxset_remove_by_data(o->client->source_outputs, o, NULL);
 298
 299     update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
 300     o->state = PA_SOURCE_OUTPUT_UNLINKED;
 301
 302     if (linked)
 303         if (o->source->asyncmsgq)
 304             pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 305
 306     reset_callbacks(o);
 307
 308     if (linked) {
 309         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 310         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 311     }
 312
 313     pa_source_update_status(o->source);
 314
 315     o->source = NULL;
 316     pa_source_output_unref(o);
 317 }
 318
 319 /* Called from main context */
 320 static void source_output_free(pa_object* mo) {
 321     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 322
 323     pa_assert(o);
 324     pa_assert(pa_source_output_refcnt(o) == 0);
 325
 326     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 327         pa_source_output_unlink(o);
 328
 329     pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
 330
 331     pa_assert(!o->thread_info.attached);
 332
 333     if (o->thread_info.delay_memblockq)
 334         pa_memblockq_free(o->thread_info.delay_memblockq);
 335
 336     if (o->thread_info.resampler)
 337         pa_resampler_free(o->thread_info.resampler);
 338
 339     if (o->proplist)
 340         pa_proplist_free(o->proplist);
 341
 342     pa_xfree(o->driver);
 343     pa_xfree(o);
 344 }
 345
 346 /* Called from main context */
 347 void pa_source_output_put(pa_source_output *o) {
 348     pa_source_output_state_t state;
 349     pa_source_output_assert_ref(o);
 350
 351     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 352
 353     /* The following fields must be initialized properly */
 354     pa_assert(o->push);
 355     pa_assert(o->kill);
 356
 357     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 358
 359     update_n_corked(o, state);
 360     o->state = state;
 361
 362     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 363
 364     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 365     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 366
 367     pa_source_update_status(o->source);
 368 }
 369
 370 /* Called from main context */
 371 void pa_source_output_kill(pa_source_output*o) {
 372     pa_source_output_assert_ref(o);
 373     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 374
 375     o->kill(o);
 376 }
 377
 378 /* Called from main context */
 379 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency) {
 380     pa_usec_t r[2] = { 0, 0 };
 381
 382     pa_source_output_assert_ref(o);
 383     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 384
 385     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 386
 387     if (o->get_latency)
 388         r[0] += o->get_latency(o);
 389
 390     if (source_latency)
 391         *source_latency = r[1];
 392
 393     return r[0];
 394 }
 395
 396 /* Called from thread context */
 397 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 398     size_t length;
 399     size_t limit, mbs = 0;
 400
 401     pa_source_output_assert_ref(o);
 402     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 403     pa_assert(chunk);
 404     pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 405
 406     if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
 407         return;
 408
 409     pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 410
 411     if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
 412         pa_log_debug("Delay queue overflow!");
 413         pa_memblockq_seek(o->thread_info.delay_memblockq, (int64_t) chunk->length, PA_SEEK_RELATIVE);
 414     }
 415
 416     limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
 417
 418     /* Implement the delay queue */
 419     while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
 420         pa_memchunk qchunk;
 421
 422         length -= limit;
 423
 424         pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
 425
 426         if (qchunk.length > length)
 427             qchunk.length = length;
 428
 429         pa_assert(qchunk.length > 0);
 430
 431         if (!o->thread_info.resampler)
 432             o->push(o, &qchunk);
 433         else {
 434             pa_memchunk rchunk;
 435
 436             if (mbs == 0)
 437                 mbs = pa_resampler_max_block_size(o->thread_info.resampler);
 438
 439             if (qchunk.length > mbs)
 440                 qchunk.length = mbs;
 441
 442             pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
 443
 444             if (rchunk.length > 0)
 445                 o->push(o, &rchunk);
 446
 447             if (rchunk.memblock)
 448                 pa_memblock_unref(rchunk.memblock);
 449         }
 450
 451         pa_memblock_unref(qchunk.memblock);
 452         pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
 453     }
 454 }
 455
 456 /* Called from thread context */
 457 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {
 458     pa_source_output_assert_ref(o);
 459
 460     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 461     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 462
 463     if (nbytes <= 0)
 464         return;
 465
 466     if (o->process_rewind) {
 467         pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
 468
 469         if (o->thread_info.resampler)
 470             nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
 471
 472         pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
 473
 474         if (nbytes > 0)
 475             o->process_rewind(o, nbytes);
 476
 477         if (o->thread_info.resampler)
 478             pa_resampler_reset(o->thread_info.resampler);
 479
 480     } else
 481         pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 482 }
 483
 484 /* Called from thread context */
 485 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
 486     pa_source_output_assert_ref(o);
 487     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 488     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 489
 490     if (o->update_max_rewind)
 491         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 492 }
 493
 494 /* Called from thread context */
 495 static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
 496     pa_source_assert_ref(s);
 497
 498     if (usec == (pa_usec_t) -1)
 499         return usec;
 500
 501     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 502         usec = s->thread_info.max_latency;
 503
 504     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 505         usec = s->thread_info.min_latency;
 506
 507     return usec;
 508 }
 509
 510 /* Called from thread context */
 511 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
 512     pa_source_output_assert_ref(o);
 513
 514     usec = fixup_latency(o->source, usec);
 515     o->thread_info.requested_source_latency = usec;
 516     pa_source_invalidate_requested_latency(o->source);
 517
 518     return usec;
 519 }
 520
 521 /* Called from main context */
 522 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
 523     pa_source_output_assert_ref(o);
 524
 525     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 526         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 527     else
 528         /* If this source output is not realized yet, we have to touch
 529          * the thread info data directly */
 530
 531         o->thread_info.requested_source_latency = usec;
 532
 533     return usec;
 534 }
 535
 536 /* Called from main context */
 537 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
 538     pa_usec_t usec = 0;
 539
 540     pa_source_output_assert_ref(o);
 541
 542     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 543         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 544     else
 545         /* If this source output is not realized yet, we have to touch
 546          * the thread info data directly */
 547         usec = o->thread_info.requested_source_latency;
 548
 549     return usec;
 550 }
 551
 552 /* Called from main context */
 553 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 554     pa_source_output_assert_ref(o);
 555     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 556
 557     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 558 }
 559
 560 /* Called from main context */
 561 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 562     pa_source_output_assert_ref(o);
 563     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 564     pa_return_val_if_fail(o->thread_info.resampler, -1);
 565
 566     if (o->sample_spec.rate == rate)
 567         return 0;
 568
 569     o->sample_spec.rate = rate;
 570
 571     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 572
 573     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 574     return 0;
 575 }
 576
 577 /* Called from main context */
 578 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 579     const char *old;
 580     pa_source_output_assert_ref(o);
 581
 582     if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
 583         return;
 584
 585     old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 586
 587     if (old && name && !strcmp(old, name))
 588         return;
 589
 590     if (name)
 591         pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
 592     else
 593         pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 594
 595     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 596         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 597         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 598     }
 599 }
 600
 601 /* Called from main thread */
 602 pa_bool_t pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p) {
 603
 604   pa_source_output_assert_ref(o);
 605
 606   pa_proplist_update(o->proplist, mode, p);
 607
 608   if (PA_SINK_IS_LINKED(o->state)) {
 609     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 610     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 611   }
 612
 613   return TRUE;
 614 }
 615
 616 /* Called from main context */
 617 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 618     pa_source_output_assert_ref(o);
 619
 620     return o->resample_method;
 621 }
 622
 623 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest) {
 624     pa_source_output_assert_ref(o);
 625     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 626     pa_source_assert_ref(dest);
 627
 628     if (dest == o->source)
 629         return TRUE;
 630
 631     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 632         return FALSE;
 633
 634     if (o->direct_on_input)
 635         return FALSE;
 636
 637     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 638         pa_log_warn("Failed to move source output: too many outputs per source.");
 639         return FALSE;
 640     }
 641
 642     if (o->may_move_to)
 643         if (!o->may_move_to(o, dest))
 644             return FALSE;
 645
 646     return TRUE;
 647 }
 648
 649 /* Called from main context */
 650 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 651     pa_source *origin;
 652     pa_resampler *new_resampler;
 653     pa_source_output_move_hook_data hook_data;
 654
 655     pa_source_output_assert_ref(o);
 656     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 657     pa_source_assert_ref(dest);
 658
 659     origin = o->source;
 660
 661     if (dest == origin)
 662         return 0;
 663
 664     if (!pa_source_output_may_move_to(o, dest))
 665         return -1;
 666
 667     if (o->thread_info.resampler &&
 668         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 669         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 670
 671         /* Try to reuse the old resampler if possible */
 672         new_resampler = o->thread_info.resampler;
 673
 674     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 675              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 676              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 677
 678         /* Okey, we need a new resampler for the new source */
 679
 680         if (!(new_resampler = pa_resampler_new(
 681                       dest->core->mempool,
 682                       &dest->sample_spec, &dest->channel_map,
 683                       &o->sample_spec, &o->channel_map,
 684                       o->resample_method,
 685                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 686                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 687                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 688             pa_log_warn("Unsupported resampling operation.");
 689             return -1;
 690         }
 691     } else
 692         new_resampler = NULL;
 693
 694     hook_data.source_output = o;
 695     hook_data.destination = dest;
 696     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 697
 698     /* Okey, let's move it */
 699     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 700
 701     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 702     pa_idxset_put(dest->outputs, o, NULL);
 703     o->source = dest;
 704
 705     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
 706         pa_assert_se(origin->n_corked-- >= 1);
 707         dest->n_corked++;
 708     }
 709
 710     /* Replace resampler */
 711     if (new_resampler != o->thread_info.resampler) {
 712         if (o->thread_info.resampler)
 713             pa_resampler_free(o->thread_info.resampler);
 714         o->thread_info.resampler = new_resampler;
 715
 716         pa_memblockq_free(o->thread_info.delay_memblockq);
 717
 718         o->thread_info.delay_memblockq = pa_memblockq_new(
 719                 0,
 720                 MEMBLOCKQ_MAXLENGTH,
 721                 0,
 722                 pa_frame_size(&o->source->sample_spec),
 723                 0,
 724                 1,
 725                 0,
 726                 &o->source->silence);
 727     }
 728
 729     pa_source_update_status(origin);
 730     pa_source_update_status(dest);
 731
 732     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 733
 734     if (o->moved)
 735         o->moved(o);
 736
 737     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 738
 739     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 740
 741     /* Notify everyone */
 742     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 743
 744     return 0;
 745 }
 746
 747 /* Called from IO thread context */
 748 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
 749     pa_source_output_assert_ref(o);
 750
 751     if (state == o->thread_info.state)
 752         return;
 753
 754     if (o->state_change)
 755         o->state_change(o, state);
 756
 757     o->thread_info.state = state;
 758 }
 759
 760 /* Called from IO thread context, except when it is not */
 761 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 762     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 763     pa_source_output_assert_ref(o);
 764
 765     switch (code) {
 766
 767         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
 768             pa_usec_t *r = userdata;
 769             pa_usec_t source_usec = 0;
 770
 771             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
 772
 773             if (o->source->parent.process_msg(PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_GET_LATENCY, &source_usec, 0, NULL) >= 0)
 774                 r[1] += source_usec;
 775
 776             return 0;
 777         }
 778
 779         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 780
 781             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 782             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 783             return 0;
 784
 785         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
 786
 787             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
 788             return 0;
 789
 790         case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY: {
 791             pa_usec_t *usec = userdata;
 792
 793             *usec = pa_source_output_set_requested_latency_within_thread(o, *usec);
 794
 795             return 0;
 796         }
 797
 798         case PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY: {
 799             pa_usec_t *r = userdata;
 800
 801             *r = o->thread_info.requested_source_latency;
 802             return 0;
 803         }
 804     }
 805
 806     return -1;
 807 }