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 static void reset_callbacks(pa_source_output *o) {
  78     pa_assert(o);
  79
  80     o->push = NULL;
  81     o->process_rewind = NULL;
  82     o->update_max_rewind = NULL;
  83     o->attach = NULL;
  84     o->detach = NULL;
  85     o->suspend = NULL;
  86     o->moved = NULL;
  87     o->kill = NULL;
  88     o->get_latency = NULL;
  89     o->state_change = NULL;
  90 }
  91
  92 pa_source_output* pa_source_output_new(
  93         pa_core *core,
  94         pa_source_output_new_data *data,
  95         pa_source_output_flags_t flags) {
  96
  97     pa_source_output *o;
  98     pa_resampler *resampler = NULL;
  99     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 100
 101     pa_assert(core);
 102     pa_assert(data);
 103
 104     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data) < 0)
 105         return NULL;
 106
 107     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 108
 109     if (!data->source)
 110         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
 111
 112     pa_return_null_if_fail(data->source);
 113     pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
 114
 115     pa_return_null_if_fail(!data->direct_on_input || data->direct_on_input->sink == data->source->monitor_of);
 116
 117     if (!data->sample_spec_is_set)
 118         data->sample_spec = data->source->sample_spec;
 119
 120     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
 121
 122     if (!data->channel_map_is_set) {
 123         if (data->source->channel_map.channels == data->sample_spec.channels)
 124             data->channel_map = data->source->channel_map;
 125         else
 126             pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 127     }
 128
 129     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 130     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 131
 132     if (flags & PA_SOURCE_OUTPUT_FIX_FORMAT)
 133         data->sample_spec.format = data->source->sample_spec.format;
 134
 135     if (flags & PA_SOURCE_OUTPUT_FIX_RATE)
 136         data->sample_spec.rate = data->source->sample_spec.rate;
 137
 138     if (flags & PA_SOURCE_OUTPUT_FIX_CHANNELS) {
 139         data->sample_spec.channels = data->source->sample_spec.channels;
 140         data->channel_map = data->source->channel_map;
 141     }
 142
 143     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 144     pa_assert(pa_channel_map_valid(&data->channel_map));
 145
 146     if (data->resample_method == PA_RESAMPLER_INVALID)
 147         data->resample_method = core->resample_method;
 148
 149     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 150
 151     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data) < 0)
 152         return NULL;
 153
 154     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 155         pa_log("Failed to create source output: too many outputs per source.");
 156         return NULL;
 157     }
 158
 159     if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 160         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 161         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 162
 163         if (!(resampler = pa_resampler_new(
 164                       core->mempool,
 165                       &data->source->sample_spec, &data->source->channel_map,
 166                       &data->sample_spec, &data->channel_map,
 167                       data->resample_method,
 168                       ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 169                       ((flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 170                       (core->disable_remixing || (flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 171             pa_log_warn("Unsupported resampling operation.");
 172             return NULL;
 173         }
 174
 175         data->resample_method = pa_resampler_get_method(resampler);
 176     }
 177
 178     o = pa_msgobject_new(pa_source_output);
 179     o->parent.parent.free = source_output_free;
 180     o->parent.process_msg = pa_source_output_process_msg;
 181
 182     o->core = core;
 183     o->state = PA_SOURCE_OUTPUT_INIT;
 184     o->flags = flags;
 185     o->proplist = pa_proplist_copy(data->proplist);
 186     o->driver = pa_xstrdup(data->driver);
 187     o->module = data->module;
 188     o->source = data->source;
 189     o->client = data->client;
 190
 191     o->resample_method = data->resample_method;
 192     o->sample_spec = data->sample_spec;
 193     o->channel_map = data->channel_map;
 194
 195     o->direct_on_input = data->direct_on_input;
 196
 197     reset_callbacks(o);
 198     o->userdata = NULL;
 199
 200     o->thread_info.state = o->state;
 201     o->thread_info.attached = FALSE;
 202     o->thread_info.sample_spec = o->sample_spec;
 203     o->thread_info.resampler = resampler;
 204     o->thread_info.requested_source_latency = (pa_usec_t) -1;
 205     o->thread_info.direct_on_input = o->direct_on_input;
 206
 207     o->thread_info.delay_memblockq = pa_memblockq_new(
 208             0,
 209             MEMBLOCKQ_MAXLENGTH,
 210             0,
 211             pa_frame_size(&o->source->sample_spec),
 212             0,
 213             1,
 214             0,
 215             &o->source->silence);
 216
 217     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 218     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 219
 220     if (o->direct_on_input)
 221         pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
 222
 223     pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s",
 224                 o->index,
 225                 pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)),
 226                 o->source->name,
 227                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
 228                 pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map));
 229
 230     /* Don't forget to call pa_source_output_put! */
 231
 232     return o;
 233 }
 234
 235 static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
 236     pa_assert(o);
 237
 238     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 239         pa_assert_se(o->source->n_corked -- >= 1);
 240     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 241         o->source->n_corked++;
 242
 243     pa_source_update_status(o->source);
 244 }
 245
 246 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 247     pa_assert(o);
 248
 249     if (o->state == state)
 250         return 0;
 251
 252     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 253         return -1;
 254
 255     update_n_corked(o, state);
 256     o->state = state;
 257
 258     if (state != PA_SOURCE_OUTPUT_UNLINKED)
 259         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 260
 261     return 0;
 262 }
 263
 264 void pa_source_output_unlink(pa_source_output*o) {
 265     pa_bool_t linked;
 266     pa_assert(o);
 267
 268     /* See pa_sink_unlink() for a couple of comments how this function
 269      * works */
 270
 271     pa_source_output_ref(o);
 272
 273     linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
 274
 275     if (linked)
 276         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 277
 278     if (o->direct_on_input)
 279         pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
 280     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 281     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 282         pa_source_output_unref(o);
 283
 284     update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
 285     o->state = PA_SOURCE_OUTPUT_UNLINKED;
 286
 287     if (linked)
 288         if (o->source->asyncmsgq)
 289             pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 290
 291     reset_callbacks(o);
 292
 293     if (linked) {
 294         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 295         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 296     }
 297
 298     o->source = NULL;
 299     pa_source_output_unref(o);
 300 }
 301
 302 static void source_output_free(pa_object* mo) {
 303     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 304
 305     pa_assert(o);
 306     pa_assert(pa_source_output_refcnt(o) == 0);
 307
 308     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 309         pa_source_output_unlink(o);
 310
 311     pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
 312
 313     pa_assert(!o->thread_info.attached);
 314
 315     if (o->thread_info.delay_memblockq)
 316         pa_memblockq_free(o->thread_info.delay_memblockq);
 317
 318     if (o->thread_info.resampler)
 319         pa_resampler_free(o->thread_info.resampler);
 320
 321     if (o->proplist)
 322         pa_proplist_free(o->proplist);
 323
 324     pa_xfree(o->driver);
 325     pa_xfree(o);
 326 }
 327
 328 void pa_source_output_put(pa_source_output *o) {
 329     pa_source_output_state_t state;
 330     pa_source_output_assert_ref(o);
 331
 332     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 333     pa_assert(o->push);
 334
 335     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 336
 337     update_n_corked(o, state);
 338     o->state = state;
 339
 340     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 341
 342     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 343     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 344 }
 345
 346 void pa_source_output_kill(pa_source_output*o) {
 347     pa_source_output_assert_ref(o);
 348     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 349
 350     if (o->kill)
 351         o->kill(o);
 352 }
 353
 354 pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
 355     pa_usec_t r = 0;
 356
 357     pa_source_output_assert_ref(o);
 358     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 359
 360     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
 361         r = 0;
 362
 363     if (o->get_latency)
 364         r += o->get_latency(o);
 365
 366     return r;
 367 }
 368
 369 /* Called from thread context */
 370 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 371     size_t length;
 372     size_t limit, mbs = 0;
 373
 374     pa_source_output_assert_ref(o);
 375     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 376     pa_assert(chunk);
 377     pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 378
 379     if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
 380         return;
 381
 382     pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 383
 384     if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
 385         pa_log_debug("Delay queue overflow!");
 386         pa_memblockq_seek(o->thread_info.delay_memblockq, chunk->length, PA_SEEK_RELATIVE);
 387     }
 388
 389     limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
 390
 391     /* Implement the delay queue */
 392     while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
 393         pa_memchunk qchunk;
 394
 395         length -= limit;
 396
 397         pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
 398
 399         if (qchunk.length > length)
 400             qchunk.length = length;
 401
 402         pa_assert(qchunk.length > 0);
 403
 404         if (!o->thread_info.resampler)
 405             o->push(o, &qchunk);
 406         else {
 407             pa_memchunk rchunk;
 408
 409             if (mbs == 0)
 410                 mbs = pa_resampler_max_block_size(o->thread_info.resampler);
 411
 412             if (qchunk.length > mbs)
 413                 qchunk.length = mbs;
 414
 415             pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
 416
 417             if (rchunk.length > 0)
 418                 o->push(o, &rchunk);
 419
 420             if (rchunk.memblock)
 421                 pa_memblock_unref(rchunk.memblock);
 422         }
 423
 424         pa_memblock_unref(qchunk.memblock);
 425         pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
 426     }
 427 }
 428
 429 /* Called from thread context */
 430 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in sink sample spec */) {
 431     pa_source_output_assert_ref(o);
 432
 433     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 434     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 435
 436     if (nbytes <= 0)
 437         return;
 438
 439     if (o->process_rewind) {
 440         pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
 441
 442         if (o->thread_info.resampler)
 443             nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
 444
 445         pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
 446
 447         if (nbytes > 0)
 448             o->process_rewind(o, nbytes);
 449
 450         if (o->thread_info.resampler)
 451             pa_resampler_reset(o->thread_info.resampler);
 452
 453     } else
 454         pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 455 }
 456
 457 /* Called from thread context */
 458 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
 459     pa_source_output_assert_ref(o);
 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 (o->update_max_rewind)
 464         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 465 }
 466
 467 static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
 468     pa_source_assert_ref(s);
 469
 470     if (usec == (pa_usec_t) -1)
 471         return usec;
 472
 473     if (s->max_latency > 0 && usec > s->max_latency)
 474         usec = s->max_latency;
 475
 476     if (s->min_latency > 0 && usec < s->min_latency)
 477         usec = s->min_latency;
 478
 479     return usec;
 480 }
 481
 482 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
 483     pa_source_output_assert_ref(o);
 484
 485     usec = fixup_latency(o->source, usec);
 486
 487     o->thread_info.requested_source_latency = usec;
 488     pa_source_invalidate_requested_latency(o->source);
 489
 490     return usec;
 491 }
 492
 493 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
 494     pa_source_output_assert_ref(o);
 495
 496     usec = fixup_latency(o->source, usec);
 497
 498     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 499         pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, NULL, (int64_t) usec, NULL, NULL);
 500     else {
 501         /* If this sink input is not realized yet, we have to touch
 502          * the thread info data directly */
 503         o->thread_info.requested_source_latency = usec;
 504         o->source->thread_info.requested_latency_valid = FALSE;
 505     }
 506
 507     return usec;
 508 }
 509
 510 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
 511     pa_usec_t usec = 0;
 512
 513     pa_source_output_assert_ref(o);
 514
 515     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 516         pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL);
 517     else
 518         /* If this sink input is not realized yet, we have to touch
 519          * the thread info data directly */
 520         usec = o->thread_info.requested_source_latency;
 521
 522     return usec;
 523 }
 524
 525 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 526     pa_source_output_assert_ref(o);
 527     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 528
 529     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 530 }
 531
 532 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 533     pa_source_output_assert_ref(o);
 534     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 535     pa_return_val_if_fail(o->thread_info.resampler, -1);
 536
 537     if (o->sample_spec.rate == rate)
 538         return 0;
 539
 540     o->sample_spec.rate = rate;
 541
 542     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 543
 544     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 545     return 0;
 546 }
 547
 548 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 549     const char *old;
 550     pa_source_output_assert_ref(o);
 551
 552     if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
 553         return;
 554
 555     old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 556
 557     if (old && name && !strcmp(old, name))
 558         return;
 559
 560     if (name)
 561         pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
 562     else
 563         pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 564
 565     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 566         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 567         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 568     }
 569 }
 570
 571 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 572     pa_source_output_assert_ref(o);
 573
 574     return o->resample_method;
 575 }
 576
 577 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 578     pa_source *origin;
 579     pa_resampler *new_resampler;
 580     pa_source_output_move_hook_data hook_data;
 581
 582     pa_source_output_assert_ref(o);
 583     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 584     pa_source_assert_ref(dest);
 585
 586     origin = o->source;
 587
 588     if (dest == origin)
 589         return 0;
 590
 591     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 592         return -1;
 593
 594     if (o->direct_on_input)
 595         return -1;
 596
 597     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 598         pa_log_warn("Failed to move source output: too many outputs per source.");
 599         return -1;
 600     }
 601
 602     if (o->thread_info.resampler &&
 603         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 604         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 605
 606         /* Try to reuse the old resampler if possible */
 607         new_resampler = o->thread_info.resampler;
 608
 609     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 610              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 611              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 612
 613         /* Okey, we need a new resampler for the new source */
 614
 615         if (!(new_resampler = pa_resampler_new(
 616                       dest->core->mempool,
 617                       &dest->sample_spec, &dest->channel_map,
 618                       &o->sample_spec, &o->channel_map,
 619                       o->resample_method,
 620                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 621                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 622                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 623             pa_log_warn("Unsupported resampling operation.");
 624             return -1;
 625         }
 626     } else
 627         new_resampler = NULL;
 628
 629     hook_data.source_output = o;
 630     hook_data.destination = dest;
 631     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 632
 633     /* Okey, let's move it */
 634     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 635
 636     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 637     pa_idxset_put(dest->outputs, o, NULL);
 638     o->source = dest;
 639
 640     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
 641         pa_assert_se(origin->n_corked-- >= 1);
 642         dest->n_corked++;
 643     }
 644
 645     /* Replace resampler */
 646     if (new_resampler != o->thread_info.resampler) {
 647         if (o->thread_info.resampler)
 648             pa_resampler_free(o->thread_info.resampler);
 649         o->thread_info.resampler = new_resampler;
 650
 651         pa_memblockq_free(o->thread_info.delay_memblockq);
 652
 653         o->thread_info.delay_memblockq = pa_memblockq_new(
 654                 0,
 655                 MEMBLOCKQ_MAXLENGTH,
 656                 0,
 657                 pa_frame_size(&o->source->sample_spec),
 658                 0,
 659                 1,
 660                 0,
 661                 &o->source->silence);
 662     }
 663
 664     pa_source_update_status(origin);
 665     pa_source_update_status(dest);
 666
 667     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 668
 669     if (o->moved)
 670         o->moved(o);
 671
 672     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 673
 674     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 675
 676     /* Notify everyone */
 677     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 678
 679     return 0;
 680 }
 681
 682 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
 683     pa_source_output_assert_ref(o);
 684
 685     if (state == o->thread_info.state)
 686         return;
 687
 688     if (o->state_change)
 689         o->state_change(o, state);
 690
 691     o->thread_info.state = state;
 692 }
 693
 694 /* Called from thread context */
 695 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 696     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 697
 698     pa_source_output_assert_ref(o);
 699     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 700
 701     switch (code) {
 702
 703         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
 704             pa_usec_t *r = userdata;
 705
 706             *r += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
 707             return 0;
 708         }
 709
 710         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 711
 712             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 713             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 714             return 0;
 715
 716         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
 717
 718             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
 719             return 0;
 720
 721         case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY:
 722
 723             pa_source_output_set_requested_latency_within_thread(o, (pa_usec_t) offset);
 724             return 0;
 725
 726         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
 727             pa_usec_t *r = userdata;
 728
 729             *r = o->thread_info.requested_source_latency;
 730             return 0;
 731         }
 732     }
 733
 734     return -1;
 735 }