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     o->state_change = NULL;
  92 }
  93
  94 pa_source_output* pa_source_output_new(
  95         pa_core *core,
  96         pa_source_output_new_data *data,
  97         pa_source_output_flags_t flags) {
  98
  99     pa_source_output *o;
 100     pa_resampler *resampler = NULL;
 101     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 102
 103     pa_assert(core);
 104     pa_assert(data);
 105
 106     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data) < 0)
 107         return NULL;
 108
 109     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 110
 111     if (!data->source)
 112         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
 113
 114     pa_return_null_if_fail(data->source);
 115     pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
 116
 117     pa_return_null_if_fail(!data->direct_on_input || data->direct_on_input->sink == data->source->monitor_of);
 118
 119     if (!data->sample_spec_is_set)
 120         data->sample_spec = data->source->sample_spec;
 121
 122     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
 123
 124     if (!data->channel_map_is_set) {
 125         if (data->source->channel_map.channels == data->sample_spec.channels)
 126             data->channel_map = data->source->channel_map;
 127         else
 128             pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 129     }
 130
 131     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 132     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 133
 134     if (flags & PA_SOURCE_OUTPUT_FIX_FORMAT)
 135         data->sample_spec.format = data->source->sample_spec.format;
 136
 137     if (flags & PA_SOURCE_OUTPUT_FIX_RATE)
 138         data->sample_spec.rate = data->source->sample_spec.rate;
 139
 140     if (flags & PA_SOURCE_OUTPUT_FIX_CHANNELS) {
 141         data->sample_spec.channels = data->source->sample_spec.channels;
 142         data->channel_map = data->source->channel_map;
 143     }
 144
 145     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 146     pa_assert(pa_channel_map_valid(&data->channel_map));
 147
 148     if (data->resample_method == PA_RESAMPLER_INVALID)
 149         data->resample_method = core->resample_method;
 150
 151     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 152
 153     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data) < 0)
 154         return NULL;
 155
 156     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 157         pa_log("Failed to create source output: too many outputs per source.");
 158         return NULL;
 159     }
 160
 161     if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 162         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 163         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 164
 165         if (!(resampler = pa_resampler_new(
 166                       core->mempool,
 167                       &data->source->sample_spec, &data->source->channel_map,
 168                       &data->sample_spec, &data->channel_map,
 169                       data->resample_method,
 170                       ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 171                       ((flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 172                       (core->disable_remixing || (flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 173             pa_log_warn("Unsupported resampling operation.");
 174             return NULL;
 175         }
 176
 177         data->resample_method = pa_resampler_get_method(resampler);
 178     }
 179
 180     o = pa_msgobject_new(pa_source_output);
 181     o->parent.parent.free = source_output_free;
 182     o->parent.process_msg = pa_source_output_process_msg;
 183
 184     o->core = core;
 185     o->state = PA_SOURCE_OUTPUT_INIT;
 186     o->flags = flags;
 187     o->proplist = pa_proplist_copy(data->proplist);
 188     o->driver = pa_xstrdup(data->driver);
 189     o->module = data->module;
 190     o->source = data->source;
 191     o->client = data->client;
 192
 193     o->resample_method = data->resample_method;
 194     o->sample_spec = data->sample_spec;
 195     o->channel_map = data->channel_map;
 196
 197     o->direct_on_input = data->direct_on_input;
 198
 199     reset_callbacks(o);
 200     o->userdata = NULL;
 201
 202     o->thread_info.state = o->state;
 203     o->thread_info.attached = FALSE;
 204     o->thread_info.sample_spec = o->sample_spec;
 205     o->thread_info.resampler = resampler;
 206     o->thread_info.requested_source_latency = (pa_usec_t) -1;
 207     o->thread_info.direct_on_input = o->direct_on_input;
 208
 209     o->thread_info.delay_memblockq = pa_memblockq_new(
 210             0,
 211             MEMBLOCKQ_MAXLENGTH,
 212             0,
 213             pa_frame_size(&o->source->sample_spec),
 214             0,
 215             1,
 216             0,
 217             &o->source->silence);
 218
 219     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 220     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 221
 222     if (o->direct_on_input)
 223         pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
 224
 225     pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s",
 226                 o->index,
 227                 pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)),
 228                 o->source->name,
 229                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
 230                 pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map));
 231
 232     /* Don't forget to call pa_source_output_put! */
 233
 234     return o;
 235 }
 236
 237 static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
 238     pa_assert(o);
 239
 240     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 241         pa_assert_se(o->source->n_corked -- >= 1);
 242     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 243         o->source->n_corked++;
 244
 245     pa_source_update_status(o->source);
 246 }
 247
 248 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 249     pa_assert(o);
 250
 251     if (o->state == state)
 252         return 0;
 253
 254     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 255         return -1;
 256
 257     update_n_corked(o, state);
 258     o->state = state;
 259
 260     if (state != PA_SOURCE_OUTPUT_UNLINKED)
 261         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 262
 263     return 0;
 264 }
 265
 266 void pa_source_output_unlink(pa_source_output*o) {
 267     pa_bool_t linked;
 268     pa_assert(o);
 269
 270     /* See pa_sink_unlink() for a couple of comments how this function
 271      * works */
 272
 273     pa_source_output_ref(o);
 274
 275     linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
 276
 277     if (linked)
 278         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 279
 280     if (o->direct_on_input)
 281         pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
 282     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 283     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 284         pa_source_output_unref(o);
 285
 286     update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
 287     o->state = PA_SOURCE_OUTPUT_UNLINKED;
 288
 289     if (linked)
 290         if (o->source->asyncmsgq)
 291             pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 292
 293     reset_callbacks(o);
 294
 295     if (linked) {
 296         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 297         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 298     }
 299
 300     o->source = NULL;
 301     pa_source_output_unref(o);
 302 }
 303
 304 static void source_output_free(pa_object* mo) {
 305     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 306
 307     pa_assert(o);
 308     pa_assert(pa_source_output_refcnt(o) == 0);
 309
 310     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 311         pa_source_output_unlink(o);
 312
 313     pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
 314
 315     pa_assert(!o->thread_info.attached);
 316
 317     if (o->thread_info.delay_memblockq)
 318         pa_memblockq_free(o->thread_info.delay_memblockq);
 319
 320     if (o->thread_info.resampler)
 321         pa_resampler_free(o->thread_info.resampler);
 322
 323     if (o->proplist)
 324         pa_proplist_free(o->proplist);
 325
 326     pa_xfree(o->driver);
 327     pa_xfree(o);
 328 }
 329
 330 void pa_source_output_put(pa_source_output *o) {
 331     pa_source_output_state_t state;
 332     pa_source_output_assert_ref(o);
 333
 334     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 335     pa_assert(o->push);
 336
 337     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 338
 339     update_n_corked(o, state);
 340     o->state = state;
 341
 342     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 343
 344     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 345     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 346 }
 347
 348 void pa_source_output_kill(pa_source_output*o) {
 349     pa_source_output_assert_ref(o);
 350     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 351
 352     if (o->kill)
 353         o->kill(o);
 354 }
 355
 356 pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
 357     pa_usec_t r = 0;
 358
 359     pa_source_output_assert_ref(o);
 360     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 361
 362     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
 363         r = 0;
 364
 365     if (o->get_latency)
 366         r += o->get_latency(o);
 367
 368     return r;
 369 }
 370
 371 /* Called from thread context */
 372 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 373     size_t length;
 374     size_t limit, mbs = 0;
 375
 376     pa_source_output_assert_ref(o);
 377     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 378     pa_assert(chunk);
 379     pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 380
 381     if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
 382         return;
 383
 384     pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 385
 386     if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
 387         pa_log_debug("Delay queue overflow!");
 388         pa_memblockq_seek(o->thread_info.delay_memblockq, chunk->length, PA_SEEK_RELATIVE);
 389     }
 390
 391     limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
 392
 393     /* Implement the delay queue */
 394     while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
 395         pa_memchunk qchunk;
 396
 397         length -= limit;
 398
 399         pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
 400
 401         if (qchunk.length > length)
 402             qchunk.length = length;
 403
 404         pa_assert(qchunk.length > 0);
 405
 406         if (!o->thread_info.resampler)
 407             o->push(o, &qchunk);
 408         else {
 409             pa_memchunk rchunk;
 410
 411             if (mbs == 0)
 412                 mbs = pa_resampler_max_block_size(o->thread_info.resampler);
 413
 414             if (qchunk.length > mbs)
 415                 qchunk.length = mbs;
 416
 417             pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
 418
 419             if (rchunk.length > 0)
 420                 o->push(o, &rchunk);
 421
 422             if (rchunk.memblock)
 423                 pa_memblock_unref(rchunk.memblock);
 424         }
 425
 426         pa_memblock_unref(qchunk.memblock);
 427         pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
 428     }
 429 }
 430
 431 /* Called from thread context */
 432 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in sink sample spec */) {
 433     pa_source_output_assert_ref(o);
 434
 435     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 436     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 437
 438     if (nbytes <= 0)
 439         return;
 440
 441     if (o->process_rewind) {
 442         pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
 443
 444         if (o->thread_info.resampler)
 445             nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
 446
 447         pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
 448
 449         if (nbytes > 0)
 450             o->process_rewind(o, nbytes);
 451
 452         if (o->thread_info.resampler)
 453             pa_resampler_reset(o->thread_info.resampler);
 454
 455     } else
 456         pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 457 }
 458
 459 /* Called from thread context */
 460 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
 461     pa_source_output_assert_ref(o);
 462     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 463     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 464
 465     if (o->update_max_rewind)
 466         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 467 }
 468
 469 static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
 470     pa_source_assert_ref(s);
 471
 472     if (usec == (pa_usec_t) -1)
 473         return usec;
 474
 475     if (s->max_latency > 0 && usec > s->max_latency)
 476         usec = s->max_latency;
 477
 478     if (s->min_latency > 0 && usec < s->min_latency)
 479         usec = s->min_latency;
 480
 481     return usec;
 482 }
 483
 484 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
 485     pa_source_output_assert_ref(o);
 486
 487     usec = fixup_latency(o->source, usec);
 488
 489     o->thread_info.requested_source_latency = usec;
 490     pa_source_invalidate_requested_latency(o->source);
 491
 492     return usec;
 493 }
 494
 495 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
 496     pa_source_output_assert_ref(o);
 497
 498     usec = fixup_latency(o->source, usec);
 499
 500     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 501         pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, NULL, (int64_t) usec, NULL, NULL);
 502     else {
 503         /* If this sink input is not realized yet, we have to touch
 504          * the thread info data directly */
 505         o->thread_info.requested_source_latency = usec;
 506         o->source->thread_info.requested_latency_valid = FALSE;
 507     }
 508
 509     return usec;
 510 }
 511
 512 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
 513     pa_usec_t usec = 0;
 514
 515     pa_source_output_assert_ref(o);
 516
 517     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 518         pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL);
 519     else
 520         /* If this sink input is not realized yet, we have to touch
 521          * the thread info data directly */
 522         usec = o->thread_info.requested_source_latency;
 523
 524     return usec;
 525 }
 526
 527 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 528     pa_source_output_assert_ref(o);
 529     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 530
 531     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 532 }
 533
 534 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 535     pa_source_output_assert_ref(o);
 536     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 537     pa_return_val_if_fail(o->thread_info.resampler, -1);
 538
 539     if (o->sample_spec.rate == rate)
 540         return 0;
 541
 542     o->sample_spec.rate = rate;
 543
 544     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 545
 546     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 547     return 0;
 548 }
 549
 550 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 551     const char *old;
 552     pa_source_output_assert_ref(o);
 553
 554     if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
 555         return;
 556
 557     old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 558
 559     if (old && name && !strcmp(old, name))
 560         return;
 561
 562     if (name)
 563         pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
 564     else
 565         pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 566
 567     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 568         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 569         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 570     }
 571 }
 572
 573 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 574     pa_source_output_assert_ref(o);
 575
 576     return o->resample_method;
 577 }
 578
 579 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 580     pa_source *origin;
 581     pa_resampler *new_resampler;
 582     pa_source_output_move_hook_data hook_data;
 583
 584     pa_source_output_assert_ref(o);
 585     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 586     pa_source_assert_ref(dest);
 587
 588     origin = o->source;
 589
 590     if (dest == origin)
 591         return 0;
 592
 593     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 594         return -1;
 595
 596     if (o->direct_on_input)
 597         return -1;
 598
 599     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 600         pa_log_warn("Failed to move source output: too many outputs per source.");
 601         return -1;
 602     }
 603
 604     if (o->thread_info.resampler &&
 605         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 606         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 607
 608         /* Try to reuse the old resampler if possible */
 609         new_resampler = o->thread_info.resampler;
 610
 611     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 612              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 613              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 614
 615         /* Okey, we need a new resampler for the new source */
 616
 617         if (!(new_resampler = pa_resampler_new(
 618                       dest->core->mempool,
 619                       &dest->sample_spec, &dest->channel_map,
 620                       &o->sample_spec, &o->channel_map,
 621                       o->resample_method,
 622                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 623                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 624                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 625             pa_log_warn("Unsupported resampling operation.");
 626             return -1;
 627         }
 628     } else
 629         new_resampler = NULL;
 630
 631     hook_data.source_output = o;
 632     hook_data.destination = dest;
 633     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 634
 635     /* Okey, let's move it */
 636     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 637
 638     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 639     pa_idxset_put(dest->outputs, o, NULL);
 640     o->source = dest;
 641
 642     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
 643         pa_assert_se(origin->n_corked-- >= 1);
 644         dest->n_corked++;
 645     }
 646
 647     /* Replace resampler */
 648     if (new_resampler != o->thread_info.resampler) {
 649         if (o->thread_info.resampler)
 650             pa_resampler_free(o->thread_info.resampler);
 651         o->thread_info.resampler = new_resampler;
 652
 653         pa_memblockq_free(o->thread_info.delay_memblockq);
 654
 655         o->thread_info.delay_memblockq = pa_memblockq_new(
 656                 0,
 657                 MEMBLOCKQ_MAXLENGTH,
 658                 0,
 659                 pa_frame_size(&o->source->sample_spec),
 660                 0,
 661                 1,
 662                 0,
 663                 &o->source->silence);
 664     }
 665
 666     pa_source_update_status(origin);
 667     pa_source_update_status(dest);
 668
 669     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 670
 671     if (o->moved)
 672         o->moved(o);
 673
 674     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 675
 676     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 677
 678     /* Notify everyone */
 679     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 680
 681     return 0;
 682 }
 683
 684 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
 685     pa_source_output_assert_ref(o);
 686
 687     if (state == o->thread_info.state)
 688         return;
 689
 690     if (o->state_change)
 691         o->state_change(o, state);
 692
 693     o->thread_info.state = state;
 694 }
 695
 696 /* Called from thread context */
 697 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 698     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 699
 700     pa_source_output_assert_ref(o);
 701     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 702
 703     switch (code) {
 704
 705         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
 706             pa_usec_t *r = userdata;
 707
 708             *r += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
 709             return 0;
 710         }
 711
 712         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 713
 714             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 715             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 716             return 0;
 717
 718         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
 719
 720             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
 721             return 0;
 722
 723         case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY:
 724
 725             pa_source_output_set_requested_latency_within_thread(o, (pa_usec_t) offset);
 726             return 0;
 727
 728         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
 729             pa_usec_t *r = userdata;
 730
 731             *r = o->thread_info.requested_source_latency;
 732             return 0;
 733         }
 734     }
 735
 736     return -1;
 737 }