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