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