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         data->resample_method = pa_resampler_get_method(resampler);
 186     }
 187
 188     o = pa_msgobject_new(pa_source_output);
 189     o->parent.parent.free = source_output_free;
 190     o->parent.process_msg = pa_source_output_process_msg;
 191
 192     o->core = core;
 193     o->state = PA_SOURCE_OUTPUT_INIT;
 194     o->flags = flags;
 195     o->proplist = pa_proplist_copy(data->proplist);
 196     o->driver = pa_xstrdup(pa_path_get_filename(data->driver));
 197     o->module = data->module;
 198     o->source = data->source;
 199     o->client = data->client;
 200
 201     o->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->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 253         pa_assert_se(o->source->n_corked -- >= 1);
 254     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 255         o->source->n_corked++;
 256
 257 }
 258
 259 /* Called from main context */
 260 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 261     pa_assert(o);
 262
 263     if (o->state == state)
 264         return 0;
 265
 266     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);
 267
 268     update_n_corked(o, state);
 269     o->state = state;
 270
 271     if (state != PA_SOURCE_OUTPUT_UNLINKED)
 272         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 273
 274     pa_source_update_status(o->source);
 275
 276     return 0;
 277 }
 278
 279 /* Called from main context */
 280 void pa_source_output_unlink(pa_source_output*o) {
 281     pa_bool_t linked;
 282     pa_assert(o);
 283
 284     /* See pa_sink_unlink() for a couple of comments how this function
 285      * works */
 286
 287     pa_source_output_ref(o);
 288
 289     linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
 290
 291     if (linked)
 292         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 293
 294     if (o->direct_on_input)
 295         pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
 296     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 297     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 298         pa_source_output_unref(o);
 299
 300     if (o->client)
 301         pa_idxset_remove_by_data(o->client->source_outputs, o, NULL);
 302
 303     update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
 304     o->state = PA_SOURCE_OUTPUT_UNLINKED;
 305
 306     if (linked)
 307         if (o->source->asyncmsgq)
 308             pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 309
 310     reset_callbacks(o);
 311
 312     if (linked) {
 313         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 314         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 315     }
 316
 317     pa_source_update_status(o->source);
 318
 319     o->source = NULL;
 320     pa_source_output_unref(o);
 321 }
 322
 323 /* Called from main context */
 324 static void source_output_free(pa_object* mo) {
 325     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 326
 327     pa_assert(o);
 328     pa_assert(pa_source_output_refcnt(o) == 0);
 329
 330     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 331         pa_source_output_unlink(o);
 332
 333     pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
 334
 335     pa_assert(!o->thread_info.attached);
 336
 337     if (o->thread_info.delay_memblockq)
 338         pa_memblockq_free(o->thread_info.delay_memblockq);
 339
 340     if (o->thread_info.resampler)
 341         pa_resampler_free(o->thread_info.resampler);
 342
 343     if (o->proplist)
 344         pa_proplist_free(o->proplist);
 345
 346     pa_xfree(o->driver);
 347     pa_xfree(o);
 348 }
 349
 350 /* Called from main context */
 351 void pa_source_output_put(pa_source_output *o) {
 352     pa_source_output_state_t state;
 353     pa_source_output_assert_ref(o);
 354
 355     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 356
 357     /* The following fields must be initialized properly */
 358     pa_assert(o->push);
 359     pa_assert(o->kill);
 360
 361     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 362
 363     update_n_corked(o, state);
 364     o->state = state;
 365
 366     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 367
 368     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 369     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 370
 371     pa_source_update_status(o->source);
 372 }
 373
 374 /* Called from main context */
 375 void pa_source_output_kill(pa_source_output*o) {
 376     pa_source_output_assert_ref(o);
 377     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 378
 379     o->kill(o);
 380 }
 381
 382 /* Called from main context */
 383 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency) {
 384     pa_usec_t r[2] = { 0, 0 };
 385
 386     pa_source_output_assert_ref(o);
 387     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 388
 389     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 390
 391     if (o->get_latency)
 392         r[0] += o->get_latency(o);
 393
 394     if (source_latency)
 395         *source_latency = r[1];
 396
 397     return r[0];
 398 }
 399
 400 /* Called from thread context */
 401 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 402     size_t length;
 403     size_t limit, mbs = 0;
 404
 405     pa_source_output_assert_ref(o);
 406     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 407     pa_assert(chunk);
 408     pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 409
 410     if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
 411         return;
 412
 413     pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 414
 415     if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
 416         pa_log_debug("Delay queue overflow!");
 417         pa_memblockq_seek(o->thread_info.delay_memblockq, (int64_t) chunk->length, PA_SEEK_RELATIVE);
 418     }
 419
 420     limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
 421
 422     /* Implement the delay queue */
 423     while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
 424         pa_memchunk qchunk;
 425
 426         length -= limit;
 427
 428         pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
 429
 430         if (qchunk.length > length)
 431             qchunk.length = length;
 432
 433         pa_assert(qchunk.length > 0);
 434
 435         if (!o->thread_info.resampler)
 436             o->push(o, &qchunk);
 437         else {
 438             pa_memchunk rchunk;
 439
 440             if (mbs == 0)
 441                 mbs = pa_resampler_max_block_size(o->thread_info.resampler);
 442
 443             if (qchunk.length > mbs)
 444                 qchunk.length = mbs;
 445
 446             pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
 447
 448             if (rchunk.length > 0)
 449                 o->push(o, &rchunk);
 450
 451             if (rchunk.memblock)
 452                 pa_memblock_unref(rchunk.memblock);
 453         }
 454
 455         pa_memblock_unref(qchunk.memblock);
 456         pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
 457     }
 458 }
 459
 460 /* Called from thread context */
 461 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {
 462     pa_source_output_assert_ref(o);
 463
 464     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 465     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 466
 467     if (nbytes <= 0)
 468         return;
 469
 470     if (o->process_rewind) {
 471         pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
 472
 473         if (o->thread_info.resampler)
 474             nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
 475
 476         pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
 477
 478         if (nbytes > 0)
 479             o->process_rewind(o, nbytes);
 480
 481         if (o->thread_info.resampler)
 482             pa_resampler_reset(o->thread_info.resampler);
 483
 484     } else
 485         pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 486 }
 487
 488 /* Called from thread context */
 489 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
 490     pa_source_output_assert_ref(o);
 491     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 492     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 493
 494     if (o->update_max_rewind)
 495         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 496 }
 497
 498 /* Called from thread context */
 499 static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
 500     pa_source_assert_ref(s);
 501
 502     if (usec == (pa_usec_t) -1)
 503         return usec;
 504
 505     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 506         usec = s->thread_info.max_latency;
 507
 508     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 509         usec = s->thread_info.min_latency;
 510
 511     return usec;
 512 }
 513
 514 /* Called from thread context */
 515 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
 516     pa_source_output_assert_ref(o);
 517
 518     usec = fixup_latency(o->source, usec);
 519     o->thread_info.requested_source_latency = usec;
 520     pa_source_invalidate_requested_latency(o->source);
 521
 522     return usec;
 523 }
 524
 525 /* Called from main context */
 526 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
 527     pa_source_output_assert_ref(o);
 528
 529     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 530         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 531     else
 532         /* If this source output is not realized yet, we have to touch
 533          * the thread info data directly */
 534
 535         o->thread_info.requested_source_latency = usec;
 536
 537     return usec;
 538 }
 539
 540 /* Called from main context */
 541 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
 542     pa_usec_t usec = 0;
 543
 544     pa_source_output_assert_ref(o);
 545
 546     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 547         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 548     else
 549         /* If this source output is not realized yet, we have to touch
 550          * the thread info data directly */
 551         usec = o->thread_info.requested_source_latency;
 552
 553     return usec;
 554 }
 555
 556 /* Called from main context */
 557 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 558     pa_source_output_assert_ref(o);
 559     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 560
 561     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 562 }
 563
 564 /* Called from main context */
 565 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 566     pa_source_output_assert_ref(o);
 567     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 568     pa_return_val_if_fail(o->thread_info.resampler, -1);
 569
 570     if (o->sample_spec.rate == rate)
 571         return 0;
 572
 573     o->sample_spec.rate = rate;
 574
 575     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 576
 577     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 578     return 0;
 579 }
 580
 581 /* Called from main context */
 582 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 583     const char *old;
 584     pa_source_output_assert_ref(o);
 585
 586     if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
 587         return;
 588
 589     old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 590
 591     if (old && name && !strcmp(old, name))
 592         return;
 593
 594     if (name)
 595         pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
 596     else
 597         pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 598
 599     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 600         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 601         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 602     }
 603 }
 604
 605 /* Called from main thread */
 606 pa_bool_t pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p) {
 607
 608   pa_source_output_assert_ref(o);
 609
 610   pa_proplist_update(o->proplist, mode, p);
 611
 612   if (PA_SINK_IS_LINKED(o->state)) {
 613     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 614     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 615   }
 616
 617   return TRUE;
 618 }
 619
 620 /* Called from main context */
 621 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 622     pa_source_output_assert_ref(o);
 623
 624     return o->resample_method;
 625 }
 626
 627 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest) {
 628     pa_source_output_assert_ref(o);
 629     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 630     pa_source_assert_ref(dest);
 631
 632     if (dest == o->source)
 633         return TRUE;
 634
 635     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 636         return FALSE;
 637
 638     if (o->direct_on_input)
 639         return FALSE;
 640
 641     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 642         pa_log_warn("Failed to move source output: too many outputs per source.");
 643         return FALSE;
 644     }
 645
 646     if (o->may_move_to)
 647         if (!o->may_move_to(o, dest))
 648             return FALSE;
 649
 650     return TRUE;
 651 }
 652
 653 /* Called from main context */
 654 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 655     pa_source *origin;
 656     pa_resampler *new_resampler;
 657     pa_source_output_move_hook_data hook_data;
 658
 659     pa_source_output_assert_ref(o);
 660     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 661     pa_source_assert_ref(dest);
 662
 663     origin = o->source;
 664
 665     if (dest == origin)
 666         return 0;
 667
 668     if (!pa_source_output_may_move_to(o, dest))
 669         return -1;
 670
 671     if (o->thread_info.resampler &&
 672         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 673         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 674
 675         /* Try to reuse the old resampler if possible */
 676         new_resampler = o->thread_info.resampler;
 677
 678     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 679              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 680              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 681
 682         /* Okey, we need a new resampler for the new source */
 683
 684         if (!(new_resampler = pa_resampler_new(
 685                       dest->core->mempool,
 686                       &dest->sample_spec, &dest->channel_map,
 687                       &o->sample_spec, &o->channel_map,
 688                       o->resample_method,
 689                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 690                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 691                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 692             pa_log_warn("Unsupported resampling operation.");
 693             return -1;
 694         }
 695     } else
 696         new_resampler = NULL;
 697
 698     hook_data.source_output = o;
 699     hook_data.destination = dest;
 700     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 701
 702     /* Okey, let's move it */
 703     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 704
 705     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 706     pa_idxset_put(dest->outputs, o, NULL);
 707     o->source = dest;
 708
 709     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
 710         pa_assert_se(origin->n_corked-- >= 1);
 711         dest->n_corked++;
 712     }
 713
 714     /* Replace resampler */
 715     if (new_resampler != o->thread_info.resampler) {
 716         if (o->thread_info.resampler)
 717             pa_resampler_free(o->thread_info.resampler);
 718         o->thread_info.resampler = new_resampler;
 719
 720         pa_memblockq_free(o->thread_info.delay_memblockq);
 721
 722         o->thread_info.delay_memblockq = pa_memblockq_new(
 723                 0,
 724                 MEMBLOCKQ_MAXLENGTH,
 725                 0,
 726                 pa_frame_size(&o->source->sample_spec),
 727                 0,
 728                 1,
 729                 0,
 730                 &o->source->silence);
 731     }
 732
 733     pa_source_update_status(origin);
 734     pa_source_update_status(dest);
 735
 736     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 737
 738     if (o->moved)
 739         o->moved(o);
 740
 741     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 742
 743     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 744
 745     /* Notify everyone */
 746     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 747
 748     return 0;
 749 }
 750
 751 /* Called from IO thread context */
 752 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
 753     pa_source_output_assert_ref(o);
 754
 755     if (state == o->thread_info.state)
 756         return;
 757
 758     if (o->state_change)
 759         o->state_change(o, state);
 760
 761     o->thread_info.state = state;
 762 }
 763
 764 /* Called from IO thread context, except when it is not */
 765 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 766     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 767     pa_source_output_assert_ref(o);
 768
 769     switch (code) {
 770
 771         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
 772             pa_usec_t *r = userdata;
 773             pa_usec_t source_usec = 0;
 774
 775             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
 776
 777             if (o->source->parent.process_msg(PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_GET_LATENCY, &source_usec, 0, NULL) >= 0)
 778                 r[1] += source_usec;
 779
 780             return 0;
 781         }
 782
 783         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 784
 785             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 786             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 787             return 0;
 788
 789         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
 790
 791             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
 792             return 0;
 793
 794         case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY: {
 795             pa_usec_t *usec = userdata;
 796
 797             *usec = pa_source_output_set_requested_latency_within_thread(o, *usec);
 798
 799             return 0;
 800         }
 801
 802         case PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY: {
 803             pa_usec_t *r = userdata;
 804
 805             *r = o->thread_info.requested_source_latency;
 806             return 0;
 807         }
 808     }
 809
 810     return -1;
 811 }