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);
 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 (data->client)
 157         pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->client->proplist);
 158
 159     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data) < 0)
 160         return NULL;
 161
 162     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 163         pa_log("Failed to create source output: too many outputs per source.");
 164         return NULL;
 165     }
 166
 167     if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 168         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 169         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 170
 171         if (!(resampler = pa_resampler_new(
 172                       core->mempool,
 173                       &data->source->sample_spec, &data->source->channel_map,
 174                       &data->sample_spec, &data->channel_map,
 175                       data->resample_method,
 176                       ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 177                       ((flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 178                       (core->disable_remixing || (flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0) |
 179                       (core->disable_lfe_remixing ? PA_RESAMPLER_NO_LFE : 0)))) {
 180             pa_log_warn("Unsupported resampling operation.");
 181             return NULL;
 182         }
 183
 184         data->resample_method = pa_resampler_get_method(resampler);
 185     }
 186
 187     o = pa_msgobject_new(pa_source_output);
 188     o->parent.parent.free = source_output_free;
 189     o->parent.process_msg = pa_source_output_process_msg;
 190
 191     o->core = core;
 192     o->state = PA_SOURCE_OUTPUT_INIT;
 193     o->flags = flags;
 194     o->proplist = pa_proplist_copy(data->proplist);
 195     o->driver = pa_xstrdup(data->driver);
 196     o->module = data->module;
 197     o->source = data->source;
 198     o->client = data->client;
 199
 200     o->resample_method = data->resample_method;
 201     o->sample_spec = data->sample_spec;
 202     o->channel_map = data->channel_map;
 203
 204     o->direct_on_input = data->direct_on_input;
 205
 206     reset_callbacks(o);
 207     o->userdata = NULL;
 208
 209     o->thread_info.state = o->state;
 210     o->thread_info.attached = FALSE;
 211     o->thread_info.sample_spec = o->sample_spec;
 212     o->thread_info.resampler = resampler;
 213     o->thread_info.requested_source_latency = (pa_usec_t) -1;
 214     o->thread_info.direct_on_input = o->direct_on_input;
 215
 216     o->thread_info.delay_memblockq = pa_memblockq_new(
 217             0,
 218             MEMBLOCKQ_MAXLENGTH,
 219             0,
 220             pa_frame_size(&o->source->sample_spec),
 221             0,
 222             1,
 223             0,
 224             &o->source->silence);
 225
 226     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 227     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 228
 229     if (o->client)
 230         pa_assert_se(pa_idxset_put(o->client->source_outputs, o, NULL) >= 0);
 231
 232     if (o->direct_on_input)
 233         pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
 234
 235     pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s",
 236                 o->index,
 237                 pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)),
 238                 o->source->name,
 239                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
 240                 pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map));
 241
 242     /* Don't forget to call pa_source_output_put! */
 243
 244     return o;
 245 }
 246
 247 /* Called from main context */
 248 static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
 249     pa_assert(o);
 250
 251     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 252         pa_assert_se(o->source->n_corked -- >= 1);
 253     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 254         o->source->n_corked++;
 255
 256 }
 257
 258 /* Called from main context */
 259 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 260     pa_assert(o);
 261
 262     if (o->state == state)
 263         return 0;
 264
 265     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);
 266
 267     update_n_corked(o, state);
 268     o->state = state;
 269
 270     if (state != PA_SOURCE_OUTPUT_UNLINKED)
 271         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 272
 273     pa_source_update_status(o->source);
 274
 275     return 0;
 276 }
 277
 278 /* Called from main context */
 279 void pa_source_output_unlink(pa_source_output*o) {
 280     pa_bool_t linked;
 281     pa_assert(o);
 282
 283     /* See pa_sink_unlink() for a couple of comments how this function
 284      * works */
 285
 286     pa_source_output_ref(o);
 287
 288     linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
 289
 290     if (linked)
 291         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 292
 293     if (o->direct_on_input)
 294         pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
 295     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 296     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 297         pa_source_output_unref(o);
 298
 299     if (o->client)
 300         pa_idxset_remove_by_data(o->client->source_outputs, o, NULL);
 301
 302     update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
 303     o->state = PA_SOURCE_OUTPUT_UNLINKED;
 304
 305     if (linked)
 306         if (o->source->asyncmsgq)
 307             pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 308
 309     reset_callbacks(o);
 310
 311     if (linked) {
 312         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 313         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 314     }
 315
 316     pa_source_update_status(o->source);
 317
 318     o->source = NULL;
 319     pa_source_output_unref(o);
 320 }
 321
 322 /* Called from main context */
 323 static void source_output_free(pa_object* mo) {
 324     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 325
 326     pa_assert(o);
 327     pa_assert(pa_source_output_refcnt(o) == 0);
 328
 329     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 330         pa_source_output_unlink(o);
 331
 332     pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
 333
 334     pa_assert(!o->thread_info.attached);
 335
 336     if (o->thread_info.delay_memblockq)
 337         pa_memblockq_free(o->thread_info.delay_memblockq);
 338
 339     if (o->thread_info.resampler)
 340         pa_resampler_free(o->thread_info.resampler);
 341
 342     if (o->proplist)
 343         pa_proplist_free(o->proplist);
 344
 345     pa_xfree(o->driver);
 346     pa_xfree(o);
 347 }
 348
 349 /* Called from main context */
 350 void pa_source_output_put(pa_source_output *o) {
 351     pa_source_output_state_t state;
 352     pa_source_output_assert_ref(o);
 353
 354     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 355
 356     /* The following fields must be initialized properly */
 357     pa_assert(o->push);
 358     pa_assert(o->kill);
 359
 360     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 361
 362     update_n_corked(o, state);
 363     o->state = state;
 364
 365     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 366
 367     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 368     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 369
 370     pa_source_update_status(o->source);
 371 }
 372
 373 /* Called from main context */
 374 void pa_source_output_kill(pa_source_output*o) {
 375     pa_source_output_assert_ref(o);
 376     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 377
 378     o->kill(o);
 379 }
 380
 381 /* Called from main context */
 382 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency) {
 383     pa_usec_t r[2] = { 0, 0 };
 384
 385     pa_source_output_assert_ref(o);
 386     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 387
 388     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 389
 390     if (o->get_latency)
 391         r[0] += o->get_latency(o);
 392
 393     if (source_latency)
 394         *source_latency = r[1];
 395
 396     return r[0];
 397 }
 398
 399 /* Called from thread context */
 400 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 401     size_t length;
 402     size_t limit, mbs = 0;
 403
 404     pa_source_output_assert_ref(o);
 405     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 406     pa_assert(chunk);
 407     pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 408
 409     if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
 410         return;
 411
 412     pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 413
 414     if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
 415         pa_log_debug("Delay queue overflow!");
 416         pa_memblockq_seek(o->thread_info.delay_memblockq, (int64_t) chunk->length, PA_SEEK_RELATIVE);
 417     }
 418
 419     limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
 420
 421     /* Implement the delay queue */
 422     while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
 423         pa_memchunk qchunk;
 424
 425         length -= limit;
 426
 427         pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
 428
 429         if (qchunk.length > length)
 430             qchunk.length = length;
 431
 432         pa_assert(qchunk.length > 0);
 433
 434         if (!o->thread_info.resampler)
 435             o->push(o, &qchunk);
 436         else {
 437             pa_memchunk rchunk;
 438
 439             if (mbs == 0)
 440                 mbs = pa_resampler_max_block_size(o->thread_info.resampler);
 441
 442             if (qchunk.length > mbs)
 443                 qchunk.length = mbs;
 444
 445             pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
 446
 447             if (rchunk.length > 0)
 448                 o->push(o, &rchunk);
 449
 450             if (rchunk.memblock)
 451                 pa_memblock_unref(rchunk.memblock);
 452         }
 453
 454         pa_memblock_unref(qchunk.memblock);
 455         pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
 456     }
 457 }
 458
 459 /* Called from thread context */
 460 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {
 461     pa_source_output_assert_ref(o);
 462
 463     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 464     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 465
 466     if (nbytes <= 0)
 467         return;
 468
 469     if (o->process_rewind) {
 470         pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
 471
 472         if (o->thread_info.resampler)
 473             nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
 474
 475         pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
 476
 477         if (nbytes > 0)
 478             o->process_rewind(o, nbytes);
 479
 480         if (o->thread_info.resampler)
 481             pa_resampler_reset(o->thread_info.resampler);
 482
 483     } else
 484         pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 485 }
 486
 487 /* Called from thread context */
 488 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
 489     pa_source_output_assert_ref(o);
 490     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 491     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 492
 493     if (o->update_max_rewind)
 494         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 495 }
 496
 497 /* Called from thread context */
 498 static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
 499     pa_source_assert_ref(s);
 500
 501     if (usec == (pa_usec_t) -1)
 502         return usec;
 503
 504     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 505         usec = s->thread_info.max_latency;
 506
 507     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 508         usec = s->thread_info.min_latency;
 509
 510     return usec;
 511 }
 512
 513 /* Called from thread context */
 514 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
 515     pa_source_output_assert_ref(o);
 516
 517     usec = fixup_latency(o->source, usec);
 518     o->thread_info.requested_source_latency = usec;
 519     pa_source_invalidate_requested_latency(o->source);
 520
 521     return usec;
 522 }
 523
 524 /* Called from main context */
 525 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
 526     pa_source_output_assert_ref(o);
 527
 528     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 529         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 530     else
 531         /* If this source output is not realized yet, we have to touch
 532          * the thread info data directly */
 533
 534         o->thread_info.requested_source_latency = usec;
 535
 536     return usec;
 537 }
 538
 539 /* Called from main context */
 540 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
 541     pa_usec_t usec = 0;
 542
 543     pa_source_output_assert_ref(o);
 544
 545     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 546         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 547     else
 548         /* If this source output is not realized yet, we have to touch
 549          * the thread info data directly */
 550         usec = o->thread_info.requested_source_latency;
 551
 552     return usec;
 553 }
 554
 555 /* Called from main context */
 556 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 557     pa_source_output_assert_ref(o);
 558     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 559
 560     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 561 }
 562
 563 /* Called from main context */
 564 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 565     pa_source_output_assert_ref(o);
 566     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 567     pa_return_val_if_fail(o->thread_info.resampler, -1);
 568
 569     if (o->sample_spec.rate == rate)
 570         return 0;
 571
 572     o->sample_spec.rate = rate;
 573
 574     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 575
 576     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 577     return 0;
 578 }
 579
 580 /* Called from main context */
 581 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 582     const char *old;
 583     pa_source_output_assert_ref(o);
 584
 585     if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
 586         return;
 587
 588     old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 589
 590     if (old && name && !strcmp(old, name))
 591         return;
 592
 593     if (name)
 594         pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
 595     else
 596         pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 597
 598     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 599         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 600         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 601     }
 602 }
 603
 604 /* Called from main thread */
 605 pa_bool_t pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p) {
 606
 607   pa_source_output_assert_ref(o);
 608
 609   pa_proplist_update(o->proplist, mode, p);
 610
 611   if (PA_SINK_IS_LINKED(o->state)) {
 612     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 613     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 614   }
 615
 616   return TRUE;
 617 }
 618
 619 /* Called from main context */
 620 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 621     pa_source_output_assert_ref(o);
 622
 623     return o->resample_method;
 624 }
 625
 626 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest) {
 627     pa_source_output_assert_ref(o);
 628     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 629     pa_source_assert_ref(dest);
 630
 631     if (dest == o->source)
 632         return TRUE;
 633
 634     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 635         return FALSE;
 636
 637     if (o->direct_on_input)
 638         return FALSE;
 639
 640     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 641         pa_log_warn("Failed to move source output: too many outputs per source.");
 642         return FALSE;
 643     }
 644
 645     if (o->may_move_to)
 646         if (!o->may_move_to(o, dest))
 647             return FALSE;
 648
 649     return TRUE;
 650 }
 651
 652 /* Called from main context */
 653 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 654     pa_source *origin;
 655     pa_resampler *new_resampler;
 656     pa_source_output_move_hook_data hook_data;
 657
 658     pa_source_output_assert_ref(o);
 659     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 660     pa_source_assert_ref(dest);
 661
 662     origin = o->source;
 663
 664     if (dest == origin)
 665         return 0;
 666
 667     if (!pa_source_output_may_move_to(o, dest))
 668         return -1;
 669
 670     if (o->thread_info.resampler &&
 671         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 672         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 673
 674         /* Try to reuse the old resampler if possible */
 675         new_resampler = o->thread_info.resampler;
 676
 677     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 678              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 679              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 680
 681         /* Okey, we need a new resampler for the new source */
 682
 683         if (!(new_resampler = pa_resampler_new(
 684                       dest->core->mempool,
 685                       &dest->sample_spec, &dest->channel_map,
 686                       &o->sample_spec, &o->channel_map,
 687                       o->resample_method,
 688                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 689                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 690                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 691             pa_log_warn("Unsupported resampling operation.");
 692             return -1;
 693         }
 694     } else
 695         new_resampler = NULL;
 696
 697     hook_data.source_output = o;
 698     hook_data.destination = dest;
 699     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 700
 701     /* Okey, let's move it */
 702     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 703
 704     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 705     pa_idxset_put(dest->outputs, o, NULL);
 706     o->source = dest;
 707
 708     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
 709         pa_assert_se(origin->n_corked-- >= 1);
 710         dest->n_corked++;
 711     }
 712
 713     /* Replace resampler */
 714     if (new_resampler != o->thread_info.resampler) {
 715         if (o->thread_info.resampler)
 716             pa_resampler_free(o->thread_info.resampler);
 717         o->thread_info.resampler = new_resampler;
 718
 719         pa_memblockq_free(o->thread_info.delay_memblockq);
 720
 721         o->thread_info.delay_memblockq = pa_memblockq_new(
 722                 0,
 723                 MEMBLOCKQ_MAXLENGTH,
 724                 0,
 725                 pa_frame_size(&o->source->sample_spec),
 726                 0,
 727                 1,
 728                 0,
 729                 &o->source->silence);
 730     }
 731
 732     pa_source_update_status(origin);
 733     pa_source_update_status(dest);
 734
 735     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 736
 737     if (o->moved)
 738         o->moved(o);
 739
 740     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 741
 742     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 743
 744     /* Notify everyone */
 745     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 746
 747     return 0;
 748 }
 749
 750 /* Called from IO thread context */
 751 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
 752     pa_source_output_assert_ref(o);
 753
 754     if (state == o->thread_info.state)
 755         return;
 756
 757     if (o->state_change)
 758         o->state_change(o, state);
 759
 760     o->thread_info.state = state;
 761 }
 762
 763 /* Called from IO thread context, except when it is not */
 764 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 765     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 766     pa_source_output_assert_ref(o);
 767
 768     switch (code) {
 769
 770         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
 771             pa_usec_t *r = userdata;
 772             pa_usec_t source_usec = 0;
 773
 774             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
 775
 776             if (o->source->parent.process_msg(PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_GET_LATENCY, &source_usec, 0, NULL) >= 0)
 777                 r[1] += source_usec;
 778
 779             return 0;
 780         }
 781
 782         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 783
 784             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 785             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 786             return 0;
 787
 788         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
 789
 790             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
 791             return 0;
 792
 793         case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY: {
 794             pa_usec_t *usec = userdata;
 795
 796             *usec = pa_source_output_set_requested_latency_within_thread(o, *usec);
 797
 798             return 0;
 799         }
 800
 801         case PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY: {
 802             pa_usec_t *r = userdata;
 803
 804             *r = o->thread_info.requested_source_latency;
 805             return 0;
 806         }
 807     }
 808
 809     return -1;
 810 }