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

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