code.delx.au - pulseaudio/blob - src/pulsecore/source-output.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include <pulse/utf8.h>
  31 #include <pulse/xmalloc.h>
  32
  33 #include <pulsecore/sample-util.h>
  34 #include <pulsecore/core-subscribe.h>
  35 #include <pulsecore/log.h>
  36 #include <pulsecore/namereg.h>
  37 #include <pulsecore/core-util.h>
  38
  39 #include "source-output.h"
  40
  41 #define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
  42
  43 static PA_DEFINE_CHECK_TYPE(pa_source_output, pa_msgobject);
  44
  45 static void source_output_free(pa_object* mo);
  46
  47 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
  48     pa_assert(data);
  49
  50     memset(data, 0, sizeof(*data));
  51     data->resample_method = PA_RESAMPLER_INVALID;
  52     data->proplist = pa_proplist_new();
  53
  54     return data;
  55 }
  56
  57 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec) {
  58     pa_assert(data);
  59
  60     if ((data->sample_spec_is_set = !!spec))
  61         data->sample_spec = *spec;
  62 }
  63
  64 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
  65     pa_assert(data);
  66
  67     if ((data->channel_map_is_set = !!map))
  68         data->channel_map = *map;
  69 }
  70
  71 void pa_source_output_new_data_done(pa_source_output_new_data *data) {
  72     pa_assert(data);
  73
  74     pa_proplist_free(data->proplist);
  75 }
  76
  77 /* Called from main context */
  78 static void reset_callbacks(pa_source_output *o) {
  79     pa_assert(o);
  80
  81     o->push = NULL;
  82     o->process_rewind = NULL;
  83     o->update_max_rewind = NULL;
  84     o->update_source_requested_latency = NULL;
  85     o->update_source_latency_range = NULL;
  86     o->attach = NULL;
  87     o->detach = NULL;
  88     o->suspend = NULL;
  89     o->moved = NULL;
  90     o->kill = NULL;
  91     o->get_latency = NULL;
  92     o->state_change = NULL;
  93     o->may_move_to = NULL;
  94 }
  95
  96 /* Called from main context */
  97 pa_source_output* pa_source_output_new(
  98         pa_core *core,
  99         pa_source_output_new_data *data,
 100         pa_source_output_flags_t flags) {
 101
 102     pa_source_output *o;
 103     pa_resampler *resampler = NULL;
 104     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 105
 106     pa_assert(core);
 107     pa_assert(data);
 108
 109     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data) < 0)
 110         return NULL;
 111
 112     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 113
 114     if (!data->source)
 115         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, TRUE);
 116
 117     pa_return_null_if_fail(data->source);
 118     pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
 119
 120     pa_return_null_if_fail(!data->direct_on_input || data->direct_on_input->sink == data->source->monitor_of);
 121
 122     if (!data->sample_spec_is_set)
 123         data->sample_spec = data->source->sample_spec;
 124
 125     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
 126
 127     if (!data->channel_map_is_set) {
 128         if (pa_channel_map_compatible(&data->source->channel_map, &data->sample_spec))
 129             data->channel_map = data->source->channel_map;
 130         else
 131             pa_channel_map_init_extend(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 132     }
 133
 134     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 135     pa_return_null_if_fail(pa_channel_map_compatible(&data->channel_map, &data->sample_spec));
 136
 137     if (flags & PA_SOURCE_OUTPUT_FIX_FORMAT)
 138         data->sample_spec.format = data->source->sample_spec.format;
 139
 140     if (flags & PA_SOURCE_OUTPUT_FIX_RATE)
 141         data->sample_spec.rate = data->source->sample_spec.rate;
 142
 143     if (flags & PA_SOURCE_OUTPUT_FIX_CHANNELS) {
 144         data->sample_spec.channels = data->source->sample_spec.channels;
 145         data->channel_map = data->source->channel_map;
 146     }
 147
 148     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 149     pa_assert(pa_channel_map_valid(&data->channel_map));
 150
 151     if (data->resample_method == PA_RESAMPLER_INVALID)
 152         data->resample_method = core->resample_method;
 153
 154     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 155
 156     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data) < 0)
 157         return NULL;
 158
 159     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 160         pa_log("Failed to create source output: too many outputs per source.");
 161         return NULL;
 162     }
 163
 164     if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 165         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 166         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 167
 168         if (!(resampler = pa_resampler_new(
 169                       core->mempool,
 170                       &data->source->sample_spec, &data->source->channel_map,
 171                       &data->sample_spec, &data->channel_map,
 172                       data->resample_method,
 173                       ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 174                       ((flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 175                       (core->disable_remixing || (flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0) |
 176                       (core->disable_lfe_remixing ? PA_RESAMPLER_NO_LFE : 0)))) {
 177             pa_log_warn("Unsupported resampling operation.");
 178             return NULL;
 179         }
 180
 181         data->resample_method = pa_resampler_get_method(resampler);
 182     }
 183
 184     o = pa_msgobject_new(pa_source_output);
 185     o->parent.parent.free = source_output_free;
 186     o->parent.process_msg = pa_source_output_process_msg;
 187
 188     o->core = core;
 189     o->state = PA_SOURCE_OUTPUT_INIT;
 190     o->flags = flags;
 191     o->proplist = pa_proplist_copy(data->proplist);
 192     o->driver = pa_xstrdup(data->driver);
 193     o->module = data->module;
 194     o->source = data->source;
 195     o->client = data->client;
 196
 197     o->resample_method = data->resample_method;
 198     o->sample_spec = data->sample_spec;
 199     o->channel_map = data->channel_map;
 200
 201     o->direct_on_input = data->direct_on_input;
 202
 203     reset_callbacks(o);
 204     o->userdata = NULL;
 205
 206     o->thread_info.state = o->state;
 207     o->thread_info.attached = FALSE;
 208     o->thread_info.sample_spec = o->sample_spec;
 209     o->thread_info.resampler = resampler;
 210     o->thread_info.requested_source_latency = (pa_usec_t) -1;
 211     o->thread_info.direct_on_input = o->direct_on_input;
 212
 213     o->thread_info.delay_memblockq = pa_memblockq_new(
 214             0,
 215             MEMBLOCKQ_MAXLENGTH,
 216             0,
 217             pa_frame_size(&o->source->sample_spec),
 218             0,
 219             1,
 220             0,
 221             &o->source->silence);
 222
 223     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 224     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 225
 226     if (o->direct_on_input)
 227         pa_assert_se(pa_idxset_put(o->direct_on_input->direct_outputs, o, NULL) == 0);
 228
 229     pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s",
 230                 o->index,
 231                 pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)),
 232                 o->source->name,
 233                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
 234                 pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map));
 235
 236     /* Don't forget to call pa_source_output_put! */
 237
 238     return o;
 239 }
 240
 241 /* Called from main context */
 242 static void update_n_corked(pa_source_output *o, pa_source_output_state_t state) {
 243     pa_assert(o);
 244
 245     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 246         pa_assert_se(o->source->n_corked -- >= 1);
 247     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 248         o->source->n_corked++;
 249
 250     pa_source_update_status(o->source);
 251 }
 252
 253 /* Called from main context */
 254 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 255     pa_assert(o);
 256
 257     if (o->state == state)
 258         return 0;
 259
 260     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);
 261
 262     update_n_corked(o, state);
 263     o->state = state;
 264
 265     if (state != PA_SOURCE_OUTPUT_UNLINKED)
 266         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 267
 268     return 0;
 269 }
 270
 271 /* Called from main context */
 272 void pa_source_output_unlink(pa_source_output*o) {
 273     pa_bool_t linked;
 274     pa_assert(o);
 275
 276     /* See pa_sink_unlink() for a couple of comments how this function
 277      * works */
 278
 279     pa_source_output_ref(o);
 280
 281     linked = PA_SOURCE_OUTPUT_IS_LINKED(o->state);
 282
 283     if (linked)
 284         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 285
 286     if (o->direct_on_input)
 287         pa_idxset_remove_by_data(o->direct_on_input->direct_outputs, o, NULL);
 288     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 289     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 290         pa_source_output_unref(o);
 291
 292     update_n_corked(o, PA_SOURCE_OUTPUT_UNLINKED);
 293     o->state = PA_SOURCE_OUTPUT_UNLINKED;
 294
 295     if (linked)
 296         if (o->source->asyncmsgq)
 297             pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 298
 299     reset_callbacks(o);
 300
 301     if (linked) {
 302         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 303         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 304     }
 305
 306     o->source = NULL;
 307     pa_source_output_unref(o);
 308 }
 309
 310 /* Called from main context */
 311 static void source_output_free(pa_object* mo) {
 312     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 313
 314     pa_assert(o);
 315     pa_assert(pa_source_output_refcnt(o) == 0);
 316
 317     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 318         pa_source_output_unlink(o);
 319
 320     pa_log_info("Freeing output %u \"%s\"", o->index, pa_strnull(pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME)));
 321
 322     pa_assert(!o->thread_info.attached);
 323
 324     if (o->thread_info.delay_memblockq)
 325         pa_memblockq_free(o->thread_info.delay_memblockq);
 326
 327     if (o->thread_info.resampler)
 328         pa_resampler_free(o->thread_info.resampler);
 329
 330     if (o->proplist)
 331         pa_proplist_free(o->proplist);
 332
 333     pa_xfree(o->driver);
 334     pa_xfree(o);
 335 }
 336
 337 /* Called from main context */
 338 void pa_source_output_put(pa_source_output *o) {
 339     pa_source_output_state_t state;
 340     pa_source_output_assert_ref(o);
 341
 342     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 343
 344     /* The following fields must be initialized properly */
 345     pa_assert(o->push);
 346     pa_assert(o->kill);
 347
 348     state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 349
 350     update_n_corked(o, state);
 351     o->state = state;
 352
 353     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 354
 355     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 356     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 357 }
 358
 359 /* Called from main context */
 360 void pa_source_output_kill(pa_source_output*o) {
 361     pa_source_output_assert_ref(o);
 362     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 363
 364     o->kill(o);
 365 }
 366
 367 /* Called from main context */
 368 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency) {
 369     pa_usec_t r[2] = { 0, 0 };
 370
 371     pa_source_output_assert_ref(o);
 372     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 373
 374     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 375
 376     if (o->get_latency)
 377         r[0] += o->get_latency(o);
 378
 379     if (source_latency)
 380         *source_latency = r[1];
 381
 382     return r[0];
 383 }
 384
 385 /* Called from thread context */
 386 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 387     size_t length;
 388     size_t limit, mbs = 0;
 389
 390     pa_source_output_assert_ref(o);
 391     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 392     pa_assert(chunk);
 393     pa_assert(pa_frame_aligned(chunk->length, &o->source->sample_spec));
 394
 395     if (!o->push || o->thread_info.state == PA_SOURCE_OUTPUT_CORKED)
 396         return;
 397
 398     pa_assert(o->thread_info.state == PA_SOURCE_OUTPUT_RUNNING);
 399
 400     if (pa_memblockq_push(o->thread_info.delay_memblockq, chunk) < 0) {
 401         pa_log_debug("Delay queue overflow!");
 402         pa_memblockq_seek(o->thread_info.delay_memblockq, (int64_t) chunk->length, PA_SEEK_RELATIVE);
 403     }
 404
 405     limit = o->process_rewind ? 0 : o->source->thread_info.max_rewind;
 406
 407     /* Implement the delay queue */
 408     while ((length = pa_memblockq_get_length(o->thread_info.delay_memblockq)) > limit) {
 409         pa_memchunk qchunk;
 410
 411         length -= limit;
 412
 413         pa_assert_se(pa_memblockq_peek(o->thread_info.delay_memblockq, &qchunk) >= 0);
 414
 415         if (qchunk.length > length)
 416             qchunk.length = length;
 417
 418         pa_assert(qchunk.length > 0);
 419
 420         if (!o->thread_info.resampler)
 421             o->push(o, &qchunk);
 422         else {
 423             pa_memchunk rchunk;
 424
 425             if (mbs == 0)
 426                 mbs = pa_resampler_max_block_size(o->thread_info.resampler);
 427
 428             if (qchunk.length > mbs)
 429                 qchunk.length = mbs;
 430
 431             pa_resampler_run(o->thread_info.resampler, &qchunk, &rchunk);
 432
 433             if (rchunk.length > 0)
 434                 o->push(o, &rchunk);
 435
 436             if (rchunk.memblock)
 437                 pa_memblock_unref(rchunk.memblock);
 438         }
 439
 440         pa_memblock_unref(qchunk.memblock);
 441         pa_memblockq_drop(o->thread_info.delay_memblockq, qchunk.length);
 442     }
 443 }
 444
 445 /* Called from thread context */
 446 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {
 447     pa_source_output_assert_ref(o);
 448
 449     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 450     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 451
 452     if (nbytes <= 0)
 453         return;
 454
 455     if (o->process_rewind) {
 456         pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
 457
 458         if (o->thread_info.resampler)
 459             nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
 460
 461         pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
 462
 463         if (nbytes > 0)
 464             o->process_rewind(o, nbytes);
 465
 466         if (o->thread_info.resampler)
 467             pa_resampler_reset(o->thread_info.resampler);
 468
 469     } else
 470         pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
 471 }
 472
 473 /* Called from thread context */
 474 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes  /* in the source's sample spec */) {
 475     pa_source_output_assert_ref(o);
 476     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
 477     pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
 478
 479     if (o->update_max_rewind)
 480         o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
 481 }
 482
 483 /* Called from thread context */
 484 static pa_usec_t fixup_latency(pa_source *s, pa_usec_t usec) {
 485     pa_source_assert_ref(s);
 486
 487     if (usec == (pa_usec_t) -1)
 488         return usec;
 489
 490     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 491         usec = s->thread_info.max_latency;
 492
 493     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 494         usec = s->thread_info.min_latency;
 495
 496     return usec;
 497 }
 498
 499 /* Called from thread context */
 500 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec) {
 501     pa_source_output_assert_ref(o);
 502
 503     usec = fixup_latency(o->source, usec);
 504     o->thread_info.requested_source_latency = usec;
 505     pa_source_invalidate_requested_latency(o->source);
 506
 507     return usec;
 508 }
 509
 510 /* Called from main context */
 511 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
 512     pa_source_output_assert_ref(o);
 513
 514     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 515         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 516     else
 517         /* If this source output is not realized yet, we have to touch
 518          * the thread info data directly */
 519
 520         o->thread_info.requested_source_latency = usec;
 521
 522     return usec;
 523 }
 524
 525 /* Called from main context */
 526 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
 527     pa_usec_t usec = 0;
 528
 529     pa_source_output_assert_ref(o);
 530
 531     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state))
 532         pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 533     else
 534         /* If this source output is not realized yet, we have to touch
 535          * the thread info data directly */
 536         usec = o->thread_info.requested_source_latency;
 537
 538     return usec;
 539 }
 540
 541 /* Called from main context */
 542 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 543     pa_source_output_assert_ref(o);
 544     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 545
 546     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 547 }
 548
 549 /* Called from main context */
 550 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 551     pa_source_output_assert_ref(o);
 552     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 553     pa_return_val_if_fail(o->thread_info.resampler, -1);
 554
 555     if (o->sample_spec.rate == rate)
 556         return 0;
 557
 558     o->sample_spec.rate = rate;
 559
 560     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 561
 562     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 563     return 0;
 564 }
 565
 566 /* Called from main context */
 567 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 568     const char *old;
 569     pa_source_output_assert_ref(o);
 570
 571     if (!name && !pa_proplist_contains(o->proplist, PA_PROP_MEDIA_NAME))
 572         return;
 573
 574     old = pa_proplist_gets(o->proplist, PA_PROP_MEDIA_NAME);
 575
 576     if (old && name && !strcmp(old, name))
 577         return;
 578
 579     if (name)
 580         pa_proplist_sets(o->proplist, PA_PROP_MEDIA_NAME, name);
 581     else
 582         pa_proplist_unset(o->proplist, PA_PROP_MEDIA_NAME);
 583
 584     if (PA_SOURCE_OUTPUT_IS_LINKED(o->state)) {
 585         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], o);
 586         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 587     }
 588 }
 589
 590 /* Called from main context */
 591 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 592     pa_source_output_assert_ref(o);
 593
 594     return o->resample_method;
 595 }
 596
 597 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest) {
 598     pa_source_output_assert_ref(o);
 599     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 600     pa_source_assert_ref(dest);
 601
 602     if (dest == o->source)
 603         return TRUE;
 604
 605     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 606         return FALSE;
 607
 608     if (o->direct_on_input)
 609         return FALSE;
 610
 611     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 612         pa_log_warn("Failed to move source output: too many outputs per source.");
 613         return FALSE;
 614     }
 615
 616     if (o->may_move_to)
 617         if (!o->may_move_to(o, dest))
 618             return FALSE;
 619
 620     return TRUE;
 621 }
 622
 623 /* Called from main context */
 624 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 625     pa_source *origin;
 626     pa_resampler *new_resampler;
 627     pa_source_output_move_hook_data hook_data;
 628
 629     pa_source_output_assert_ref(o);
 630     pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
 631     pa_source_assert_ref(dest);
 632
 633     origin = o->source;
 634
 635     if (dest == origin)
 636         return 0;
 637
 638     if (!pa_source_output_may_move_to(o, dest))
 639         return -1;
 640
 641     if (o->thread_info.resampler &&
 642         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 643         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 644
 645         /* Try to reuse the old resampler if possible */
 646         new_resampler = o->thread_info.resampler;
 647
 648     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 649              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 650              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 651
 652         /* Okey, we need a new resampler for the new source */
 653
 654         if (!(new_resampler = pa_resampler_new(
 655                       dest->core->mempool,
 656                       &dest->sample_spec, &dest->channel_map,
 657                       &o->sample_spec, &o->channel_map,
 658                       o->resample_method,
 659                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 660                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 661                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 662             pa_log_warn("Unsupported resampling operation.");
 663             return -1;
 664         }
 665     } else
 666         new_resampler = NULL;
 667
 668     hook_data.source_output = o;
 669     hook_data.destination = dest;
 670     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 671
 672     /* Okey, let's move it */
 673     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);
 674
 675     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 676     pa_idxset_put(dest->outputs, o, NULL);
 677     o->source = dest;
 678
 679     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
 680         pa_assert_se(origin->n_corked-- >= 1);
 681         dest->n_corked++;
 682     }
 683
 684     /* Replace resampler */
 685     if (new_resampler != o->thread_info.resampler) {
 686         if (o->thread_info.resampler)
 687             pa_resampler_free(o->thread_info.resampler);
 688         o->thread_info.resampler = new_resampler;
 689
 690         pa_memblockq_free(o->thread_info.delay_memblockq);
 691
 692         o->thread_info.delay_memblockq = pa_memblockq_new(
 693                 0,
 694                 MEMBLOCKQ_MAXLENGTH,
 695                 0,
 696                 pa_frame_size(&o->source->sample_spec),
 697                 0,
 698                 1,
 699                 0,
 700                 &o->source->silence);
 701     }
 702
 703     pa_source_update_status(origin);
 704     pa_source_update_status(dest);
 705
 706     pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL) == 0);
 707
 708     if (o->moved)
 709         o->moved(o);
 710
 711     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 712
 713     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 714
 715     /* Notify everyone */
 716     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 717
 718     return 0;
 719 }
 720
 721 /* Called from IO thread context */
 722 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state) {
 723     pa_source_output_assert_ref(o);
 724
 725     if (state == o->thread_info.state)
 726         return;
 727
 728     if (o->state_change)
 729         o->state_change(o, state);
 730
 731     o->thread_info.state = state;
 732 }
 733
 734 /* Called from IO thread context, except when it is not */
 735 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 736     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 737     pa_source_output_assert_ref(o);
 738
 739     switch (code) {
 740
 741         case PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY: {
 742             pa_usec_t *r = userdata;
 743             pa_usec_t source_usec = 0;
 744
 745             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(o->thread_info.delay_memblockq), &o->source->sample_spec);
 746
 747             if (o->source->parent.process_msg(PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_GET_LATENCY, &source_usec, 0, NULL) >= 0)
 748                 r[1] += source_usec;
 749
 750             return 0;
 751         }
 752
 753         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE:
 754
 755             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 756             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 757             return 0;
 758
 759         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE:
 760
 761             pa_source_output_set_state_within_thread(o, PA_PTR_TO_UINT(userdata));
 762             return 0;
 763
 764         case PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY: {
 765             pa_usec_t *usec = userdata;
 766
 767             *usec = pa_source_output_set_requested_latency_within_thread(o, *usec);
 768
 769             return 0;
 770         }
 771
 772         case PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY: {
 773             pa_usec_t *r = userdata;
 774
 775             *r = o->thread_info.requested_source_latency;
 776             return 0;
 777         }
 778     }
 779
 780     return -1;
 781 }