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 2.1 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 #include <pulse/util.h>
  33
  34 #include <pulsecore/sample-util.h>
  35 #include <pulsecore/core-subscribe.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/namereg.h>
  38 #include <pulsecore/core-util.h>
  39
  40 #include "source-output.h"
  41
  42 #define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
  43
  44 PA_DEFINE_PUBLIC_CLASS(pa_source_output, pa_msgobject);
  45
  46 static void source_output_free(pa_object* mo);
  47
  48 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
  49     pa_assert(data);
  50
  51     pa_zero(*data);
  52     data->resample_method = PA_RESAMPLER_INVALID;
  53     data->proplist = pa_proplist_new();
  54
  55     return data;
  56 }
  57
  58 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
  59     pa_assert(data);
  60
  61     if ((data->sample_spec_is_set = !!spec))
  62         data->sample_spec = *spec;
  63 }
  64
  65 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
  66     pa_assert(data);
  67
  68     if ((data->channel_map_is_set = !!map))
  69         data->channel_map = *map;
  70 }
  71
  72 void pa_source_output_new_data_done(pa_source_output_new_data *data) {
  73     pa_assert(data);
  74
  75     pa_proplist_free(data->proplist);
  76 }
  77
  78 /* Called from main context */
  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->update_source_requested_latency = NULL;
  86     o->update_source_latency_range = NULL;
  87     o->update_source_fixed_latency = NULL;
  88     o->attach = NULL;
  89     o->detach = NULL;
  90     o->suspend = NULL;
  91     o->suspend_within_thread = NULL;
  92     o->moving = NULL;
  93     o->kill = NULL;
  94     o->get_latency = NULL;
  95     o->state_change = NULL;
  96     o->may_move_to = NULL;
  97     o->send_event = NULL;
  98 }
  99
 100 /* Called from main context */
 101 int pa_source_output_new(
 102         pa_source_output**_o,
 103         pa_core *core,
 104         pa_source_output_new_data *data) {
 105
 106     pa_source_output *o;
 107     pa_resampler *resampler = NULL;
 108     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 109     int r;
 110     char *pt;
 111
 112     pa_assert(_o);
 113     pa_assert(core);
 114     pa_assert(data);
 115     pa_assert_ctl_context();
 116
 117     if (data->client)
 118         pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->client->proplist);
 119
 120     if ((r = pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data)) < 0)
 121         return r;
 122
 123     pa_return_val_if_fail(!data->driver || pa_utf8_valid(data->driver), -PA_ERR_INVALID);
 124
 125     if (!data->source) {
 126         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE);
 127         data->save_source = FALSE;
 128     }
 129
 130     pa_return_val_if_fail(data->source, -PA_ERR_NOENTITY);
 131     pa_return_val_if_fail(PA_SOURCE_IS_LINKED(pa_source_get_state(data->source)), -PA_ERR_BADSTATE);
 132     pa_return_val_if_fail(!data->direct_on_input || data->direct_on_input->sink == data->source->monitor_of, -PA_ERR_INVALID);
 133
 134     if (!data->sample_spec_is_set)
 135         data->sample_spec = data->source->sample_spec;
 136
 137     pa_return_val_if_fail(pa_sample_spec_valid(&data->sample_spec), -PA_ERR_INVALID);
 138
 139     if (!data->channel_map_is_set) {
 140         if (pa_channel_map_compatible(&data->source->channel_map, &data->sample_spec))
 141             data->channel_map = data->source->channel_map;
 142         else
 143             pa_channel_map_init_extend(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 144     }
 145
 146     pa_return_val_if_fail(pa_channel_map_valid(&data->channel_map), -PA_ERR_INVALID);
 147     pa_return_val_if_fail(pa_channel_map_compatible(&data->channel_map, &data->sample_spec), -PA_ERR_INVALID);
 148
 149     if (data->flags & PA_SOURCE_OUTPUT_FIX_FORMAT)
 150         data->sample_spec.format = data->source->sample_spec.format;
 151
 152     if (data->flags & PA_SOURCE_OUTPUT_FIX_RATE)
 153         data->sample_spec.rate = data->source->sample_spec.rate;
 154
 155     if (data->flags & PA_SOURCE_OUTPUT_FIX_CHANNELS) {
 156         data->sample_spec.channels = data->source->sample_spec.channels;
 157         data->channel_map = data->source->channel_map;
 158     }
 159
 160     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 161     pa_assert(pa_channel_map_valid(&data->channel_map));
 162
 163     if (data->resample_method == PA_RESAMPLER_INVALID)
 164         data->resample_method = core->resample_method;
 165
 166     pa_return_val_if_fail(data->resample_method < PA_RESAMPLER_MAX, -PA_ERR_INVALID);
 167
 168     if ((r = pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data)) < 0)
 169         return r;
 170
 171     if ((data->flags & PA_SOURCE_OUTPUT_NO_CREATE_ON_SUSPEND) &&
 172         pa_source_get_state(data->source) == PA_SOURCE_SUSPENDED) {
 173         pa_log("Failed to create source output: source is suspended.");
 174         return -PA_ERR_BADSTATE;
 175     }
 176
 177     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 178         pa_log("Failed to create source output: too many outputs per source.");
 179         return -PA_ERR_TOOLARGE;
 180     }
 181
 182     if ((data->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 183         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 184         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 185
 186         if (!(resampler = pa_resampler_new(
 187                       core->mempool,
 188                       &data->source->sample_spec, &data->source->channel_map,
 189                       &data->sample_spec, &data->channel_map,
 190                       data->resample_method,
 191                       ((data->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 192                       ((data->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 193                       (core->disable_remixing || (data->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0) |
 194                       (core->disable_lfe_remixing ? PA_RESAMPLER_NO_LFE : 0)))) {
 195             pa_log_warn("Unsupported resampling operation.");
 196             return -PA_ERR_NOTSUPPORTED;
 197         }
 198     }
 199
 200     o = pa_msgobject_new(pa_source_output);
 201     o->parent.parent.free = source_output_free;
 202     o->parent.process_msg = pa_source_output_process_msg;
 203
 204     o->core = core;
 205     o->state = PA_SOURCE_OUTPUT_INIT;
 206     o->flags = data->flags;
 207     o->proplist = pa_proplist_copy(data->proplist);
 208     o->driver = pa_xstrdup(pa_path_get_filename(data->driver));
 209     o->module = data->module;
 210     o->source = data->source;
 211     o->client = data->client;
 212
 213     o->actual_resample_method = resampler ? pa_resampler_get_method(resampler) : PA_RESAMPLER_INVALID;
 214     o->requested_resample_method = data->resample_method;
 215     o->sample_spec = data->sample_spec;
 216     o->channel_map = data->channel_map;
 217
 218     o->direct_on_input = data->direct_on_input;
 219
 220     o->save_source = data->save_source;
 221
 222     reset_callbacks(o);
 223     o->userdata = NULL;
 224
 225     o->thread_info.state = o->state;
 226     o->thread_info.attached = FALSE;
 227     o->thread_info.sample_spec = o->sample_spec;
 228     o->thread_info.resampler = resampler;
 229     o->thread_info.requested_source_latency = (pa_usec_t) -1;
 230     o->thread_info.direct_on_input = o->direct_on_input;
 231
 232     o->thread_info.delay_memblockq = pa_memblockq_new(
 233             0,
 234             MEMBLOCKQ_MAXLENGTH,
 235             0,
 236             pa_frame_size(&o->source->sample_spec),
 237             0,
 238             1,
 239             0,
 240             &o->source->silence);
 241
 242     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 243     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 244
 245     if (o->client)
 246         pa_assert_se(pa_idxset_put(o->client->source_outputs, o, NULL) >= 0);
 247
 248     if (o->direct_on_input)
 249         pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
 250
 251     pt = pa_proplist_to_string_sep(o->proplist, "\n    ");
 252     pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s\n    %s",
 253                 o->index,
 254                 pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)),
 255                 o->source->name,
 256                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
 257                 pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map),
 258                 pt);
 259     pa_xfree(pt);
 260
 261     /* Don't forget to call pa_source_output_put! */
 262
 263     *_o = o;
 264     return 0;
 265 }
 266
 267 /* Called from main context */
 268 static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
 269     pa_assert(o);
 270     pa_assert_ctl_context();
 271
 272     if (!o->source)
 273         return;
 274
 275     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 276         pa_assert_se(o->source->n_corked -- >= 1);
 277     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 278         o->source->n_corked++;
 279 }
 280
 281 /* Called from main context */
 282 static void source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 283     pa_assert(o);
 284     pa_assert_ctl_context();
 285
 286     if (o->state == state)
 287         return;
 288
 289     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);
 290
 291     update_n_corked(o, state);
 292     o->state = state;
 293
 294     if (state != PA_SOURCE_OUTPUT_UNLINKED) {
 295         pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 296
 297         if (PA_SOURCE_OUTPUT_IS_LINKED(state))
 298             pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 299     }
 300
 301     pa_source_update_status(o->source);
 302 }
 303
 304 /* Called from main context */
 305 void pa_source_output_unlink(pa_source_output*o) {
 306     pa_bool_t linked;
 307     pa_assert(o);
 308     pa_assert_ctl_context();
 309
 310     /* See pa_sink_unlink() for a couple of comments how this function
 311      * works */
 312
 313     pa_source_output_ref(o);
 314
 315     linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
 316
 317     if (linked)
 318         pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 319
 320     if (o->direct_on_input)
 321         pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
 322
 323     pa_idxset_remove_by_data(o->core->source_outputs, o, NULL);
 324
 325     if (o->source)
 326         if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 327             pa_source_output_unref(o);
 328
 329     if (o->client)
 330         pa_idxset_remove_by_data(o->client->source_outputs, o, NULL);
 331
 332     update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
 333     o->state = PA_SOURCE_OUTPUT_UNLINKED;
 334
 335     if (linked && o->source)
 336         if (o->source->asyncmsgq)
 337             pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 338
 339     reset_callbacks(o);
 340
 341     if (linked) {
 342         pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 343         pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 344     }
 345
 346     if (o->source) {
 347         pa_source_update_status(o->source);
 348         o->source = NULL;
 349     }
 350
 351     pa_core_maybe_vacuum(o->core);
 352
 353     pa_source_output_unref(o);
 354 }
 355
 356 /* Called from main context */
 357 static void source_output_free(pa_object* mo) {
 358     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 359
 360     pa_assert(o);
 361     pa_assert_ctl_context();
 362     pa_assert(pa_source_output_refcnt(o) == 0);
 363
 364     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 365         pa_source_output_unlink(o);
 366
 367     pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
 368
 369     if (o->thread_info.delay_memblockq)
 370         pa_memblockq_free(o->thread_info.delay_memblockq);
 371
 372     if (o->thread_info.resampler)
 373         pa_resampler_free(o->thread_info.resampler);
 374
 375     if (o->proplist)
 376         pa_proplist_free(o->proplist);
 377
 378     pa_xfree(o->driver);
 379     pa_xfree(o);
 380 }
 381
 382 /* Called from main context */
 383 void pa_source_output_put(pa_source_output *o) {
 384     pa_source_output_state_t state;
 385
 386     pa_source_output_assert_ref(o);
 387     pa_assert_ctl_context();
 388
 389     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 390
 391     /* The following fields must be initialized properly */
 392     pa_assert(o->push);
 393     pa_assert(o->kill);
 394
 395     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 396
 397     update_n_corked(o, state);
 398     o->state = state;
 399
 400     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 401
 402     pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 403     pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 404
 405     pa_source_update_status(o->source);
 406 }
 407
 408 /* Called from main context */
 409 void pa_source_output_kill(pa_source_output*o) {
 410     pa_source_output_assert_ref(o);
 411     pa_assert_ctl_context();
 412     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 413
 414     o->kill(o);
 415 }
 416
 417 /* Called from main context */
 418 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency) {
 419     pa_usec_t r[2] = { 0, 0 };
 420
 421     pa_source_output_assert_ref(o);
 422     pa_assert_ctl_context();
 423     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 424
 425     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 426
 427     if (o->get_latency)
 428         r[0] += o->get_latency(o);
 429
 430     if (source_latency)
 431         *source_latency = r[1];
 432
 433     return r[0];
 434 }
 435
 436 /* Called from thread context */
 437 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 438     size_t length;
 439     size_t limit, mbs = 0;
 440
 441     pa_source_output_assert_ref(o);
 442     pa_source_output_assert_io_context(o);
 443     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 444     pa_assert(chunk);
 445     pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 446
 447     if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
 448         return;
 449
 450     pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 451
 452     if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
 453         pa_log_debug("Delay queue overflow!");
 454         pa_memblockq_seek(o->thread_info.delay_memblockq, (int64_t) chunk->length, PA_SEEK_RELATIVE, TRUE);
 455     }
 456
 457     limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
 458
 459     if (limit > 0 && o->source->monitor_of) {
 460         pa_usec_t latency;
 461         size_t n;
 462
 463         /* Hmm, check the latency for knowing how much of the buffered
 464          * data is actually still unplayed and might hence still
 465          * change. This is suboptimal. Ideally we'd have a call like
 466          * pa_sink_get_changeable_size() or so that tells us how much
 467          * of the queued data is actually still changeable. Hence
 468          * FIXME! */
 469
 470         latency = pa_sink_get_latency_within_thread(o->source->monitor_of);
 471
 472         n = pa_usec_to_bytes(latency, &o->source->sample_spec);
 473
 474         if (n < limit)
 475             limit = n;
 476     }
 477
 478     /* Implement the delay queue */
 479     while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
 480         pa_memchunk qchunk;
 481
 482         length -= limit;
 483
 484         pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
 485
 486         if (qchunk.length > length)
 487             qchunk.length = length;
 488
 489         pa_assert(qchunk.length > 0);
 490
 491         if (!o->thread_info.resampler)
 492             o->push(o, &qchunk);
 493         else {
 494             pa_memchunk rchunk;
 495
 496             if (mbs == 0)
 497                 mbs = pa_resampler_max_block_size(o->thread_info.resampler);
 498
 499             if (qchunk.length > mbs)
 500                 qchunk.length = mbs;
 501
 502             pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
 503
 504             if (rchunk.length > 0)
 505                 o->push(o, &rchunk);
 506
 507             if (rchunk.memblock)
 508                 pa_memblock_unref(rchunk.memblock);
 509         }
 510
 511         pa_memblock_unref(qchunk.memblock);
 512         pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
 513     }
 514 }
 515
 516 /* Called from thread context */
 517 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {
 518
 519     pa_source_output_assert_ref(o);
 520     pa_source_output_assert_io_context(o);
 521     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 522     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 523
 524     if (nbytes <= 0)
 525         return;
 526
 527     if (o->process_rewind) {
 528         pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
 529
 530         if (o->thread_info.resampler)
 531             nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
 532
 533         pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
 534
 535         if (nbytes > 0)
 536             o->process_rewind(o, nbytes);
 537
 538         if (o->thread_info.resampler)
 539             pa_resampler_reset(o->thread_info.resampler);
 540
 541     } else
 542         pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 543 }
 544
 545 /* Called from thread context */
 546 size_t pa_source_output_get_max_rewind(pa_source_output *o) {
 547     pa_source_output_assert_ref(o);
 548     pa_source_output_assert_io_context(o);
 549
 550     return o->thread_info.resampler ? pa_resampler_request(o->thread_info.resampler, o->source->thread_info.max_rewind) : o->source->thread_info.max_rewind;
 551 }
 552
 553 /* Called from thread context */
 554 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
 555     pa_source_output_assert_ref(o);
 556     pa_source_output_assert_io_context(o);
 557     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 558     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 559
 560     if (o->update_max_rewind)
 561         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 562 }
 563
 564 /* Called from thread context */
 565 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
 566     pa_source_output_assert_ref(o);
 567     pa_source_output_assert_io_context(o);
 568
 569     if (!(o->source->flags & PA_SOURCE_DYNAMIC_LATENCY))
 570         usec = o->source->thread_info.fixed_latency;
 571
 572     if (usec != (pa_usec_t) -1)
 573         usec = PA_CLAMP(usec, o->source->thread_info.min_latency, o->source->thread_info.max_latency);
 574
 575     o->thread_info.requested_source_latency = usec;
 576     pa_source_invalidate_requested_latency(o->source, TRUE);
 577
 578     return usec;
 579 }
 580
 581 /* Called from main context */
 582 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
 583     pa_source_output_assert_ref(o);
 584     pa_assert_ctl_context();
 585
 586     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state) && o->source) {
 587         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 588         return usec;
 589     }
 590
 591     /* If this source output is not realized yet or is being moved, we
 592      * have to touch the thread info data directly */
 593
 594     if (o->source) {
 595         if (!(o->source->flags & PA_SOURCE_DYNAMIC_LATENCY))
 596             usec = pa_source_get_fixed_latency(o->source);
 597
 598         if (usec != (pa_usec_t) -1) {
 599             pa_usec_t min_latency, max_latency;
 600             pa_source_get_latency_range(o->source, &min_latency, &max_latency);
 601             usec = PA_CLAMP(usec, min_latency, max_latency);
 602         }
 603     }
 604
 605     o->thread_info.requested_source_latency = usec;
 606
 607     return usec;
 608 }
 609
 610 /* Called from main context */
 611 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
 612     pa_source_output_assert_ref(o);
 613     pa_assert_ctl_context();
 614
 615     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state) && o->source) {
 616         pa_usec_t usec = 0;
 617         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 618         return usec;
 619     }
 620
 621     /* If this source output is not realized yet or is being moved, we
 622      * have to touch the thread info data directly */
 623
 624     return o->thread_info.requested_source_latency;
 625 }
 626
 627 /* Called from main context */
 628 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 629     pa_source_output_assert_ref(o);
 630     pa_assert_ctl_context();
 631     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 632
 633     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 634 }
 635
 636 /* Called from main context */
 637 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 638     pa_source_output_assert_ref(o);
 639     pa_assert_ctl_context();
 640     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 641     pa_return_val_if_fail(o->thread_info.resampler, -PA_ERR_BADSTATE);
 642
 643     if (o->sample_spec.rate == rate)
 644         return 0;
 645
 646     o->sample_spec.rate = rate;
 647
 648     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 649
 650     pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 651     return 0;
 652 }
 653
 654 /* Called from main context */
 655 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 656     const char *old;
 657     pa_assert_ctl_context();
 658     pa_source_output_assert_ref(o);
 659
 660     if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
 661         return;
 662
 663     old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 664
 665     if (old && name && !strcmp(old, name))
 666         return;
 667
 668     if (name)
 669         pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
 670     else
 671         pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 672
 673     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 674         pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 675         pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 676     }
 677 }
 678
 679 /* Called from main thread */
 680 void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p) {
 681     pa_source_output_assert_ref(o);
 682     pa_assert_ctl_context();
 683
 684     if (p)
 685         pa_proplist_update(o->proplist, mode, p);
 686
 687     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 688         pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 689         pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 690     }
 691 }
 692
 693 /* Called from main context */
 694 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 695     pa_source_output_assert_ref(o);
 696     pa_assert_ctl_context();
 697
 698     return o->actual_resample_method;
 699 }
 700
 701 /* Called from main context */
 702 pa_bool_t pa_source_output_may_move(pa_source_output *o) {
 703     pa_source_output_assert_ref(o);
 704     pa_assert_ctl_context();
 705     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 706
 707     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 708         return FALSE;
 709
 710     if (o->direct_on_input)
 711         return FALSE;
 712
 713     return TRUE;
 714 }
 715
 716 /* Called from main context */
 717 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest) {
 718     pa_source_output_assert_ref(o);
 719     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 720     pa_source_assert_ref(dest);
 721
 722     if (dest == o->source)
 723         return TRUE;
 724
 725     if (!pa_source_output_may_move(o))
 726         return FALSE;
 727
 728     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 729         pa_log_warn("Failed to move source output: too many outputs per source.");
 730         return FALSE;
 731     }
 732
 733     if (o->may_move_to)
 734         if (!o->may_move_to(o, dest))
 735             return FALSE;
 736
 737     return TRUE;
 738 }
 739
 740 /* Called from main context */
 741 int pa_source_output_start_move(pa_source_output *o) {
 742     pa_source *origin;
 743     int r;
 744
 745     pa_source_output_assert_ref(o);
 746     pa_assert_ctl_context();
 747     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 748     pa_assert(o->source);
 749
 750     if (!pa_source_output_may_move(o))
 751         return -PA_ERR_NOTSUPPORTED;
 752
 753     if ((r = pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_START], o)) < 0)
 754         return r;
 755
 756     origin = o->source;
 757
 758     pa_idxset_remove_by_data(o->source->outputs, o, NULL);
 759
 760     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED)
 761         pa_assert_se(origin->n_corked-- >= 1);
 762
 763     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 764
 765     pa_source_update_status(o->source);
 766     o->source = NULL;
 767
 768     pa_source_output_unref(o);
 769
 770     return 0;
 771 }
 772
 773 /* Called from main context */
 774 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, pa_bool_t save) {
 775     pa_resampler *new_resampler;
 776
 777     pa_source_output_assert_ref(o);
 778     pa_assert_ctl_context();
 779     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 780     pa_assert(!o->source);
 781     pa_source_assert_ref(dest);
 782
 783     if (!pa_source_output_may_move_to(o, dest))
 784         return -1;
 785
 786     if (o->thread_info.resampler &&
 787         pa_sample_spec_equal(pa_resampler_input_sample_spec(o->thread_info.resampler), &dest->sample_spec) &&
 788         pa_channel_map_equal(pa_resampler_input_channel_map(o->thread_info.resampler), &dest->channel_map))
 789
 790         /* Try to reuse the old resampler if possible */
 791         new_resampler = o->thread_info.resampler;
 792
 793     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 794              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 795              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 796
 797         /* Okey, we need a new resampler for the new source */
 798
 799         if (!(new_resampler = pa_resampler_new(
 800                       o->core->mempool,
 801                       &dest->sample_spec, &dest->channel_map,
 802                       &o->sample_spec, &o->channel_map,
 803                       o->requested_resample_method,
 804                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 805                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 806                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 807             pa_log_warn("Unsupported resampling operation.");
 808             return -PA_ERR_NOTSUPPORTED;
 809         }
 810     } else
 811         new_resampler = NULL;
 812
 813     if (o->moving)
 814         o->moving(o, dest);
 815
 816     o->source = dest;
 817     o->save_source = save;
 818     pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL);
 819
 820     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED)
 821         o->source->n_corked++;
 822
 823     /* Replace resampler */
 824     if (new_resampler != o->thread_info.resampler) {
 825         if (o->thread_info.resampler)
 826             pa_resampler_free(o->thread_info.resampler);
 827         o->thread_info.resampler = new_resampler;
 828
 829         pa_memblockq_free(o->thread_info.delay_memblockq);
 830
 831         o->thread_info.delay_memblockq = pa_memblockq_new(
 832                 0,
 833                 MEMBLOCKQ_MAXLENGTH,
 834                 0,
 835                 pa_frame_size(&o->source->sample_spec),
 836                 0,
 837                 1,
 838                 0,
 839                 &o->source->silence);
 840     }
 841
 842     pa_source_update_status(dest);
 843
 844     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 845
 846     pa_log_debug("Successfully moved source output %i to %s.", o->index, dest->name);
 847
 848     /* Notify everyone */
 849     pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FINISH], o);
 850     pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 851
 852     return 0;
 853 }
 854
 855 /* Called from main context */
 856 void pa_source_output_fail_move(pa_source_output *o) {
 857
 858     pa_source_output_assert_ref(o);
 859     pa_assert_ctl_context();
 860     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 861     pa_assert(!o->source);
 862
 863     /* Check if someone wants this source output? */
 864     if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FAIL], o) == PA_HOOK_STOP)
 865         return;
 866
 867     if (o->moving)
 868         o->moving(o, NULL);
 869
 870     pa_source_output_kill(o);
 871 }
 872
 873 /* Called from main context */
 874 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save) {
 875     int r;
 876
 877     pa_source_output_assert_ref(o);
 878     pa_assert_ctl_context();
 879     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 880     pa_assert(o->source);
 881     pa_source_assert_ref(dest);
 882
 883     if (dest == o->source)
 884         return 0;
 885
 886     if (!pa_source_output_may_move_to(o, dest))
 887         return -PA_ERR_NOTSUPPORTED;
 888
 889     pa_source_output_ref(o);
 890
 891     if ((r = pa_source_output_start_move(o)) < 0) {
 892         pa_source_output_unref(o);
 893         return r;
 894     }
 895
 896     if ((r = pa_source_output_finish_move(o, dest, save)) < 0) {
 897         pa_source_output_fail_move(o);
 898         pa_source_output_unref(o);
 899         return r;
 900     }
 901
 902     pa_source_output_unref(o);
 903
 904     return 0;
 905 }
 906
 907 /* Called from IO thread context */
 908 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
 909     pa_source_output_assert_ref(o);
 910     pa_source_output_assert_io_context(o);
 911
 912     if (state == o->thread_info.state)
 913         return;
 914
 915     if (o->state_change)
 916         o->state_change(o, state);
 917
 918     o->thread_info.state = state;
 919 }
 920
 921 /* Called from IO thread context, except when it is not */
 922 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 923     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 924     pa_source_output_assert_ref(o);
 925
 926     switch (code) {
 927
 928         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
 929             pa_usec_t *r = userdata;
 930
 931             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
 932             r[1] += pa_source_get_latency_within_thread(o->source);
 933
 934             return 0;
 935         }
 936
 937         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 938
 939             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 940             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 941             return 0;
 942
 943         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
 944
 945             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
 946             return 0;
 947
 948         case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY: {
 949             pa_usec_t *usec = userdata;
 950
 951             *usec = pa_source_output_set_requested_latency_within_thread(o, *usec);
 952
 953             return 0;
 954         }
 955
 956         case PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY: {
 957             pa_usec_t *r = userdata;
 958
 959             *r = o->thread_info.requested_source_latency;
 960             return 0;
 961         }
 962     }
 963
 964     return -PA_ERR_NOTIMPLEMENTED;
 965 }
 966
 967 /* Called from main context */
 968 void pa_source_output_send_event(pa_source_output *o, const char *event, pa_proplist *data) {
 969     pa_proplist *pl = NULL;
 970     pa_source_output_send_event_hook_data hook_data;
 971
 972     pa_source_output_assert_ref(o);
 973     pa_assert_ctl_context();
 974     pa_assert(event);
 975
 976     if (!o->send_event)
 977         return;
 978
 979     if (!data)
 980         data = pl = pa_proplist_new();
 981
 982     hook_data.source_output = o;
 983     hook_data.data = data;
 984     hook_data.event = event;
 985
 986     if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_SEND_EVENT], &hook_data) < 0)
 987         goto finish;
 988
 989     o->send_event(o, event, data);
 990
 991 finish:
 992     if (pl)
 993         pa_proplist_free(pl);
 994 }