code.delx.au - pulseaudio/blob - src/pulsecore/sink-input.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as published
  11   by the Free Software Foundation; either version 2 of the License,
  12   or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <pulse/utf8.h>
  34 #include <pulse/xmalloc.h>
  35
  36 #include <pulsecore/sample-util.h>
  37 #include <pulsecore/core-subscribe.h>
  38 #include <pulsecore/log.h>
  39 #include <pulsecore/play-memblockq.h>
  40 #include <pulsecore/namereg.h>
  41
  42 #include "sink-input.h"
  43
  44 #define CONVERT_BUFFER_LENGTH 4096
  45 #define MOVE_BUFFER_LENGTH (1024*1024)
  46 #define SILENCE_BUFFER_LENGTH (64*1024)
  47
  48 static PA_DEFINE_CHECK_TYPE(pa_sink_input, pa_msgobject);
  49
  50 static void sink_input_free(pa_object *o);
  51
  52 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data) {
  53     pa_assert(data);
  54
  55     memset(data, 0, sizeof(*data));
  56     data->resample_method = PA_RESAMPLER_INVALID;
  57
  58     return data;
  59 }
  60
  61 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map) {
  62     pa_assert(data);
  63
  64     if ((data->channel_map_is_set = !!map))
  65         data->channel_map = *map;
  66 }
  67
  68 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume) {
  69     pa_assert(data);
  70
  71     if ((data->volume_is_set = !!volume))
  72         data->volume = *volume;
  73 }
  74
  75 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec) {
  76     pa_assert(data);
  77
  78     if ((data->sample_spec_is_set = !!spec))
  79         data->sample_spec = *spec;
  80 }
  81
  82 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, int mute) {
  83     pa_assert(data);
  84
  85     data->muted_is_set = 1;
  86     data->muted = !!mute;
  87 }
  88
  89 pa_sink_input* pa_sink_input_new(
  90         pa_core *core,
  91         pa_sink_input_new_data *data,
  92         pa_sink_input_flags_t flags) {
  93
  94     pa_sink_input *i;
  95     pa_resampler *resampler = NULL;
  96     char st[PA_SAMPLE_SPEC_SNPRINT_MAX];
  97
  98     pa_assert(core);
  99     pa_assert(data);
 100
 101     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_INPUT_NEW], data) < 0)
 102         return NULL;
 103
 104     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 105     pa_return_null_if_fail(!data->name || pa_utf8_valid(data->name));
 106
 107     if (!data->sink)
 108         data->sink = pa_namereg_get(core, NULL, PA_NAMEREG_SINK, 1);
 109
 110     pa_return_null_if_fail(data->sink);
 111     pa_return_null_if_fail(pa_sink_get_state(data->sink) != PA_SINK_DISCONNECTED);
 112     pa_return_null_if_fail(!data->sync_base || (data->sync_base->sink == data->sink && pa_sink_input_get_state(data->sync_base) == PA_SINK_INPUT_CORKED));
 113
 114     if (!data->sample_spec_is_set)
 115         data->sample_spec = data->sink->sample_spec;
 116
 117     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
 118
 119     if (!data->channel_map_is_set) {
 120         if (data->sink->channel_map.channels == data->sample_spec.channels)
 121             data->channel_map = data->sink->channel_map;
 122         else
 123             pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 124     }
 125
 126     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 127     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 128
 129     if (!data->volume_is_set)
 130         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 131
 132     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 133     pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
 134
 135     if (!data->muted_is_set)
 136         data->muted = 0;
 137
 138     if (data->resample_method == PA_RESAMPLER_INVALID)
 139         data->resample_method = core->resample_method;
 140
 141     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 142
 143     if (pa_idxset_size(data->sink->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 144         pa_log_warn("Failed to create sink input: too many inputs per sink.");
 145         return NULL;
 146     }
 147
 148     if ((flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 149         !pa_sample_spec_equal(&data->sample_spec, &data->sink->sample_spec) ||
 150         !pa_channel_map_equal(&data->channel_map, &data->sink->channel_map)) {
 151
 152         if (!(resampler = pa_resampler_new(
 153                       core->mempool,
 154                       &data->sample_spec, &data->channel_map,
 155                       &data->sink->sample_spec, &data->sink->channel_map,
 156                       data->resample_method,
 157                       !!(flags & PA_SINK_INPUT_VARIABLE_RATE)))) {
 158             pa_log_warn("Unsupported resampling operation.");
 159             return NULL;
 160         }
 161
 162         data->resample_method = pa_resampler_get_method(resampler);
 163     }
 164
 165     i = pa_msgobject_new(pa_sink_input);
 166     i->parent.parent.free = sink_input_free;
 167     i->parent.process_msg = pa_sink_input_process_msg;
 168
 169     i->core = core;
 170     i->state = data->start_corked ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 171     i->flags = flags;
 172     i->name = pa_xstrdup(data->name);
 173     i->driver = pa_xstrdup(data->driver);
 174     i->module = data->module;
 175     i->sink = data->sink;
 176     i->client = data->client;
 177
 178     i->resample_method = data->resample_method;
 179     i->sample_spec = data->sample_spec;
 180     i->channel_map = data->channel_map;
 181
 182     i->volume = data->volume;
 183     i->muted = data->muted;
 184
 185     if (data->sync_base) {
 186         i->sync_next = data->sync_base->sync_next;
 187         i->sync_prev = data->sync_base;
 188
 189         if (data->sync_base->sync_next)
 190             data->sync_base->sync_next->sync_prev = i;
 191         data->sync_base->sync_next = i;
 192     } else
 193         i->sync_next = i->sync_prev = NULL;
 194
 195     i->peek = NULL;
 196     i->drop = NULL;
 197     i->kill = NULL;
 198     i->get_latency = NULL;
 199     i->underrun = NULL;
 200     i->userdata = NULL;
 201
 202     i->thread_info.state = i->state;
 203     pa_atomic_store(&i->thread_info.drained, 1);
 204     i->thread_info.sample_spec = i->sample_spec;
 205     i->thread_info.silence_memblock = NULL;
 206     i->thread_info.move_silence = 0;
 207     pa_memchunk_reset(&i->thread_info.resampled_chunk);
 208     i->thread_info.resampler = resampler;
 209     i->thread_info.volume = i->volume;
 210     i->thread_info.muted = i->muted;
 211
 212     pa_assert_se(pa_idxset_put(core->sink_inputs, pa_sink_input_ref(i), &i->index) == 0);
 213     pa_assert_se(pa_idxset_put(i->sink->inputs, i, NULL) == 0);
 214
 215     pa_log_info("Created input %u \"%s\" on %s with sample spec %s",
 216                 i->index,
 217                 i->name,
 218                 i->sink->name,
 219                 pa_sample_spec_snprint(st, sizeof(st), &i->sample_spec));
 220
 221     /* Don't forget to call pa_sink_input_put! */
 222
 223     return i;
 224 }
 225
 226 static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
 227     pa_sink_input *ssync;
 228     pa_assert(i);
 229
 230     if (state == PA_SINK_INPUT_DRAINED)
 231         state = PA_SINK_INPUT_RUNNING;
 232
 233     if (i->state == state)
 234         return 0;
 235
 236     if (pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 237         return -1;
 238
 239     i->state = state;
 240     for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev)
 241         ssync->state = state;
 242     for (ssync = i->sync_next; ssync; ssync = ssync->sync_next)
 243         ssync->state = state;
 244
 245     return 0;
 246 }
 247
 248 void pa_sink_input_disconnect(pa_sink_input *i) {
 249     pa_assert(i);
 250     pa_return_if_fail(i->state != PA_SINK_INPUT_DISCONNECTED);
 251
 252     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_DISCONNECT], i);
 253
 254     if (i->sync_prev)
 255         i->sync_prev->sync_next = i->sync_next;
 256     if (i->sync_next)
 257         i->sync_next->sync_prev = i->sync_prev;
 258
 259     i->sync_prev = i->sync_next = NULL;
 260
 261     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT, i, 0, NULL);
 262     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
 263     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
 264
 265     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 266
 267     sink_input_set_state(i, PA_SINK_INPUT_DISCONNECTED);
 268     pa_sink_update_status(i->sink);
 269
 270     i->peek = NULL;
 271     i->drop = NULL;
 272     i->kill = NULL;
 273     i->get_latency = NULL;
 274     i->underrun = NULL;
 275
 276     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_DISCONNECT_POST], i);
 277     i->sink = NULL;
 278     pa_sink_input_unref(i);
 279 }
 280
 281 static void sink_input_free(pa_object *o) {
 282     pa_sink_input* i = PA_SINK_INPUT(o);
 283
 284     pa_assert(i);
 285     pa_assert(pa_sink_input_refcnt(i) == 0);
 286
 287     if (i->state != PA_SINK_INPUT_DISCONNECTED)
 288         pa_sink_input_disconnect(i);
 289
 290     pa_log_info("Freeing output %u \"%s\"", i->index, i->name);
 291
 292     if (i->thread_info.resampled_chunk.memblock)
 293         pa_memblock_unref(i->thread_info.resampled_chunk.memblock);
 294
 295     if (i->thread_info.resampler)
 296         pa_resampler_free(i->thread_info.resampler);
 297
 298     if (i->thread_info.silence_memblock)
 299         pa_memblock_unref(i->thread_info.silence_memblock);
 300
 301     pa_xfree(i->name);
 302     pa_xfree(i->driver);
 303     pa_xfree(i);
 304 }
 305
 306 void pa_sink_input_put(pa_sink_input *i) {
 307     pa_sink_input_assert_ref(i);
 308
 309     i->thread_info.volume = i->volume;
 310     i->thread_info.muted = i->muted;
 311
 312     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL);
 313     pa_sink_update_status(i->sink);
 314
 315     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
 316     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
 317 }
 318
 319 void pa_sink_input_kill(pa_sink_input*i) {
 320     pa_sink_input_assert_ref(i);
 321
 322     if (i->kill)
 323         i->kill(i);
 324 }
 325
 326 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i) {
 327     pa_usec_t r = 0;
 328
 329     pa_sink_input_assert_ref(i);
 330
 331     if (pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
 332         r = 0;
 333
 334     if (i->get_latency)
 335         r += i->get_latency(i);
 336
 337     return r;
 338 }
 339
 340 /* Called from thread context */
 341 int pa_sink_input_peek(pa_sink_input *i, pa_memchunk *chunk, pa_cvolume *volume) {
 342     int ret = -1;
 343     int do_volume_adj_here;
 344     int volume_is_norm;
 345
 346     pa_sink_input_assert_ref(i);
 347     pa_assert(chunk);
 348     pa_assert(volume);
 349
 350     if (!i->peek || !i->drop || i->thread_info.state == PA_SINK_INPUT_DISCONNECTED || i->thread_info.state == PA_SINK_INPUT_CORKED)
 351         goto finish;
 352
 353     pa_assert(i->thread_info.state == PA_SINK_INPUT_RUNNING || i->thread_info.state == PA_SINK_INPUT_DRAINED);
 354
 355     if (i->thread_info.move_silence > 0) {
 356         size_t l;
 357
 358         /* We have just been moved and shall play some silence for a
 359          * while until the old sink has drained its playback buffer */
 360
 361         if (!i->thread_info.silence_memblock)
 362             i->thread_info.silence_memblock = pa_silence_memblock_new(i->sink->core->mempool, &i->sink->sample_spec, SILENCE_BUFFER_LENGTH);
 363
 364         chunk->memblock = pa_memblock_ref(i->thread_info.silence_memblock);
 365         chunk->index = 0;
 366         l = pa_memblock_get_length(chunk->memblock);
 367         chunk->length = i->thread_info.move_silence < l ? i->thread_info.move_silence : l;
 368
 369         ret = 0;
 370         do_volume_adj_here = 1;
 371         goto finish;
 372     }
 373
 374     if (!i->thread_info.resampler) {
 375         do_volume_adj_here = 0; /* FIXME??? */
 376         ret = i->peek(i, chunk);
 377         goto finish;
 378     }
 379
 380     do_volume_adj_here = !pa_channel_map_equal(&i->channel_map, &i->sink->channel_map);
 381     volume_is_norm = pa_cvolume_is_norm(&i->thread_info.volume) && !i->thread_info.muted;
 382
 383     while (!i->thread_info.resampled_chunk.memblock) {
 384         pa_memchunk tchunk;
 385         size_t l;
 386
 387         if ((ret = i->peek(i, &tchunk)) < 0)
 388             goto finish;
 389
 390         pa_assert(tchunk.length > 0);
 391
 392         l = pa_resampler_request(i->thread_info.resampler, CONVERT_BUFFER_LENGTH);
 393
 394         if (tchunk.length > l)
 395             tchunk.length = l;
 396
 397         i->drop(i, tchunk.length);
 398
 399         /* It might be necessary to adjust the volume here */
 400         if (do_volume_adj_here && !volume_is_norm) {
 401             pa_memchunk_make_writable(&tchunk, 0);
 402
 403             if (i->thread_info.muted)
 404                 pa_silence_memchunk(&tchunk, &i->thread_info.sample_spec);
 405             else
 406                 pa_volume_memchunk(&tchunk, &i->thread_info.sample_spec, &i->thread_info.volume);
 407         }
 408
 409         pa_resampler_run(i->thread_info.resampler, &tchunk, &i->thread_info.resampled_chunk);
 410         pa_memblock_unref(tchunk.memblock);
 411     }
 412
 413     pa_assert(i->thread_info.resampled_chunk.memblock);
 414     pa_assert(i->thread_info.resampled_chunk.length > 0);
 415
 416     *chunk = i->thread_info.resampled_chunk;
 417     pa_memblock_ref(i->thread_info.resampled_chunk.memblock);
 418
 419     ret = 0;
 420
 421 finish:
 422
 423     if (ret < 0 && !pa_atomic_load(&i->thread_info.drained) && i->underrun)
 424         i->underrun(i);
 425
 426     if (ret >= 0)
 427         pa_atomic_store(&i->thread_info.drained, 0);
 428     else if (ret < 0)
 429         pa_atomic_store(&i->thread_info.drained, 1);
 430
 431     if (ret >= 0) {
 432         /* Let's see if we had to apply the volume adjustment
 433          * ourselves, or if this can be done by the sink for us */
 434
 435         if (do_volume_adj_here)
 436             /* We had different channel maps, so we already did the adjustment */
 437             pa_cvolume_reset(volume, i->sink->sample_spec.channels);
 438         else if (i->thread_info.muted)
 439             /* We've both the same channel map, so let's have the sink do the adjustment for us*/
 440             pa_cvolume_mute(volume, i->sink->sample_spec.channels);
 441         else
 442             *volume = i->thread_info.volume;
 443     }
 444
 445     return ret;
 446 }
 447
 448 /* Called from thread context */
 449 void pa_sink_input_drop(pa_sink_input *i, size_t length) {
 450     pa_sink_input_assert_ref(i);
 451     pa_assert(length > 0);
 452
 453     if (i->thread_info.move_silence > 0) {
 454
 455         pa_assert(i->thread_info.move_silence >= length);
 456
 457         i->thread_info.move_silence -= length;
 458
 459         if (i->thread_info.move_silence <= 0) {
 460             pa_assert(i->thread_info.silence_memblock);
 461             pa_memblock_unref(i->thread_info.silence_memblock);
 462             i->thread_info.silence_memblock = NULL;
 463         }
 464
 465         return;
 466     }
 467
 468     if (i->thread_info.resampled_chunk.memblock) {
 469         size_t l = length;
 470
 471         if (l > i->thread_info.resampled_chunk.length)
 472             l = i->thread_info.resampled_chunk.length;
 473
 474         i->thread_info.resampled_chunk.index += l;
 475         i->thread_info.resampled_chunk.length -= l;
 476
 477         if (i->thread_info.resampled_chunk.length <= 0) {
 478             pa_memblock_unref(i->thread_info.resampled_chunk.memblock);
 479             pa_memchunk_reset(&i->thread_info.resampled_chunk);
 480         }
 481
 482         length -= l;
 483     }
 484
 485     if (length > 0) {
 486
 487         if (i->thread_info.resampler) {
 488             /* So, we have a resampler. To avoid discontinuities we
 489              * have to actually read all data that could be read and
 490              * pass it through the resampler. */
 491
 492             while (length > 0) {
 493                 pa_memchunk chunk;
 494                 pa_cvolume volume;
 495
 496                 if (pa_sink_input_peek(i, &chunk, &volume) >= 0) {
 497                     size_t l;
 498
 499                     pa_memblock_unref(chunk.memblock);
 500
 501                     l = chunk.length;
 502                     if (l > length)
 503                         l = length;
 504
 505                     pa_sink_input_drop(i, l);
 506                     length -= l;
 507
 508                 } else {
 509                     size_t l;
 510
 511                     /* Hmmm, peeking failed, so let's at least drop
 512                      * the right amount of data */
 513
 514                     if ((l = pa_resampler_request(i->thread_info.resampler, length)) > 0)
 515                         if (i->drop)
 516                             i->drop(i, l);
 517
 518                     break;
 519                 }
 520             }
 521
 522         } else {
 523
 524             /* We have no resampler, hence let's just drop the data */
 525
 526             if (i->drop)
 527                 i->drop(i, length);
 528         }
 529     }
 530 }
 531
 532 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume) {
 533     pa_sink_input_assert_ref(i);
 534
 535     if (pa_cvolume_equal(&i->volume, volume))
 536         return;
 537
 538     i->volume = *volume;
 539
 540     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_VOLUME, pa_xnewdup(struct pa_cvolume, volume, 1), 0, NULL, pa_xfree);
 541     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 542 }
 543
 544 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
 545     pa_sink_input_assert_ref(i);
 546
 547     return &i->volume;
 548 }
 549
 550 void pa_sink_input_set_mute(pa_sink_input *i, int mute) {
 551     pa_assert(i);
 552     pa_sink_input_assert_ref(i);
 553
 554     if (!i->muted == !mute)
 555         return;
 556
 557     i->muted = mute;
 558
 559     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 560     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 561 }
 562
 563 int pa_sink_input_get_mute(pa_sink_input *i) {
 564     pa_sink_input_assert_ref(i);
 565
 566     return !!i->muted;
 567 }
 568
 569 void pa_sink_input_cork(pa_sink_input *i, int b) {
 570     pa_sink_input_assert_ref(i);
 571
 572     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 573 }
 574
 575 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
 576     pa_sink_input_assert_ref(i);
 577     pa_return_val_if_fail(i->thread_info.resampler, -1);
 578
 579     if (i->sample_spec.rate == rate)
 580         return 0;
 581
 582     i->sample_spec.rate = rate;
 583
 584     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 585
 586     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 587     return 0;
 588 }
 589
 590 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
 591     pa_sink_input_assert_ref(i);
 592
 593     if (!i->name && !name)
 594         return;
 595
 596     if (i->name && name && !strcmp(i->name, name))
 597         return;
 598
 599     pa_xfree(i->name);
 600     i->name = pa_xstrdup(name);
 601
 602     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 603 }
 604
 605 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
 606     pa_sink_input_assert_ref(i);
 607
 608     return i->resample_method;
 609 }
 610
 611 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately) {
 612     pa_resampler *new_resampler = NULL;
 613     pa_sink *origin;
 614     pa_usec_t silence_usec = 0;
 615     pa_sink_input_move_info info;
 616
 617     pa_sink_input_assert_ref(i);
 618     pa_sink_assert_ref(dest);
 619
 620     origin = i->sink;
 621
 622     if (dest == origin)
 623         return 0;
 624
 625     if (i->sync_next || i->sync_prev) {
 626         pa_log_warn("Moving synchronised streams not supported.");
 627         return -1;
 628     }
 629
 630     if (pa_idxset_size(dest->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 631         pa_log_warn("Failed to move sink input: too many inputs per sink.");
 632         return -1;
 633     }
 634
 635     if (i->thread_info.resampler &&
 636         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 637         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 638
 639         /* Try to reuse the old resampler if possible */
 640         new_resampler = i->thread_info.resampler;
 641
 642     else if ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 643              !pa_sample_spec_equal(&i->sample_spec, &dest->sample_spec) ||
 644              !pa_channel_map_equal(&i->channel_map, &dest->channel_map)) {
 645
 646         /* Okey, we need a new resampler for the new sink */
 647
 648         if (!(new_resampler = pa_resampler_new(
 649                       dest->core->mempool,
 650                       &i->sample_spec, &i->channel_map,
 651                       &dest->sample_spec, &dest->channel_map,
 652                       i->resample_method,
 653                       !!(i->flags & PA_SINK_INPUT_VARIABLE_RATE)))) {
 654             pa_log_warn("Unsupported resampling operation.");
 655             return -1;
 656         }
 657     }
 658
 659     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE], i);
 660
 661     memset(&info, 0, sizeof(info));
 662     info.sink_input = i;
 663
 664     if (!immediately) {
 665         pa_usec_t old_latency, new_latency;
 666
 667         /* Let's do a little bit of Voodoo for compensating latency
 668          * differences. We assume that the accuracy for our
 669          * estimations is still good enough, even though we do these
 670          * operations non-atomic. */
 671
 672         old_latency = pa_sink_get_latency(origin);
 673         new_latency = pa_sink_get_latency(dest);
 674
 675         /* The already resampled data should go to the old sink */
 676
 677         if (old_latency >= new_latency) {
 678
 679             /* The latency of the old sink is larger than the latency
 680              * of the new sink. Therefore to compensate for the
 681              * difference we to play silence on the new one for a
 682              * while */
 683
 684             silence_usec = old_latency - new_latency;
 685
 686         } else {
 687
 688             /* The latency of new sink is larger than the latency of
 689              * the old sink. Therefore we have to precompute a little
 690              * and make sure that this is still played on the old
 691              * sink, until we can play the first sample on the new
 692              * sink.*/
 693
 694             info.buffer_bytes = pa_usec_to_bytes(new_latency - old_latency, &origin->sample_spec);
 695         }
 696
 697         /* Okey, let's move it */
 698
 699         if (info.buffer_bytes > 0) {
 700
 701             info.ghost_sink_input = pa_memblockq_sink_input_new(
 702                     origin,
 703                     "Ghost Stream",
 704                     &origin->sample_spec,
 705                     &origin->channel_map,
 706                     NULL,
 707                     NULL);
 708
 709             info.buffer = pa_memblockq_new(0, MOVE_BUFFER_LENGTH, 0, pa_frame_size(&origin->sample_spec), 0, 0, NULL);
 710         }
 711     }
 712
 713     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT_AND_BUFFER, &info, 0, NULL);
 714
 715     if (info.ghost_sink_input) {
 716         /* Basically, do what pa_sink_input_put() does ...*/
 717         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, info.ghost_sink_input->index);
 718         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], info.ghost_sink_input);
 719         pa_sink_input_unref(info.ghost_sink_input);
 720     }
 721
 722     pa_idxset_remove_by_data(origin->inputs, i, NULL);
 723     pa_idxset_put(dest->inputs, i, NULL);
 724     i->sink = dest;
 725
 726     /* Replace resampler */
 727     if (new_resampler != i->thread_info.resampler) {
 728         if (i->thread_info.resampler)
 729             pa_resampler_free(i->thread_info.resampler);
 730         i->thread_info.resampler = new_resampler;
 731
 732         /* if the resampler changed, the silence memblock is
 733          * probably invalid now, too */
 734         if (i->thread_info.silence_memblock) {
 735             pa_memblock_unref(i->thread_info.silence_memblock);
 736             i->thread_info.silence_memblock = NULL;
 737         }
 738     }
 739
 740     /* Dump already resampled data */
 741     if (i->thread_info.resampled_chunk.memblock) {
 742         /* Hmm, this data has already been added to the ghost queue, presumably, hence let's sleep a little bit longer */
 743         silence_usec += pa_bytes_to_usec(i->thread_info.resampled_chunk.length, &origin->sample_spec);
 744         pa_memblock_unref(i->thread_info.resampled_chunk.memblock);
 745         pa_memchunk_reset(&i->thread_info.resampled_chunk);
 746     }
 747
 748     /* Calculate the new sleeping time */
 749     if (immediately)
 750         i->thread_info.move_silence = 0;
 751     else
 752         i->thread_info.move_silence = pa_usec_to_bytes(
 753                 pa_bytes_to_usec(i->thread_info.move_silence, &i->sample_spec) +
 754                 silence_usec,
 755                 &i->sample_spec);
 756
 757     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL);
 758
 759     pa_sink_update_status(origin);
 760     pa_sink_update_status(dest);
 761
 762     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_POST], i);
 763
 764     pa_log_debug("Successfully moved sink input %i from %s to %s.", i->index, origin->name, dest->name);
 765
 766     /* Notify everyone */
 767     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 768
 769     return 0;
 770 }
 771
 772 /* Called from thread context */
 773 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 774     pa_sink_input *i = PA_SINK_INPUT(o);
 775
 776     pa_sink_input_assert_ref(i);
 777
 778     switch (code) {
 779         case PA_SINK_INPUT_MESSAGE_SET_VOLUME:
 780             i->thread_info.volume = *((pa_cvolume*) userdata);
 781             return 0;
 782
 783         case PA_SINK_INPUT_MESSAGE_SET_MUTE:
 784             i->thread_info.muted = PA_PTR_TO_UINT(userdata);
 785             return 0;
 786
 787         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
 788             pa_usec_t *r = userdata;
 789
 790             if (i->thread_info.resampled_chunk.memblock)
 791                 *r += pa_bytes_to_usec(i->thread_info.resampled_chunk.length, &i->sink->sample_spec);
 792
 793             if (i->thread_info.move_silence)
 794                 *r += pa_bytes_to_usec(i->thread_info.move_silence, &i->sink->sample_spec);
 795
 796             return 0;
 797         }
 798
 799         case PA_SINK_INPUT_MESSAGE_SET_RATE:
 800
 801             i->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 802             pa_resampler_set_input_rate(i->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 803
 804             return 0;
 805
 806         case PA_SINK_INPUT_MESSAGE_SET_STATE: {
 807             pa_sink_input *ssync;
 808
 809             if ((PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_DRAINED || PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_RUNNING) &&
 810                 (i->thread_info.state != PA_SINK_INPUT_DRAINED) && (i->thread_info.state != PA_SINK_INPUT_RUNNING))
 811                 pa_atomic_store(&i->thread_info.drained, 1);
 812
 813             i->thread_info.state = PA_PTR_TO_UINT(userdata);
 814
 815             for (ssync = i->thread_info.sync_prev; ssync; ssync = ssync->thread_info.sync_prev) {
 816                 if ((PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_DRAINED || PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_RUNNING) &&
 817                     (ssync->thread_info.state != PA_SINK_INPUT_DRAINED) && (ssync->thread_info.state != PA_SINK_INPUT_RUNNING))
 818                     pa_atomic_store(&ssync->thread_info.drained, 1);
 819                 ssync->thread_info.state = PA_PTR_TO_UINT(userdata);
 820             }
 821
 822             for (ssync = i->thread_info.sync_next; ssync; ssync = ssync->thread_info.sync_next) {
 823                 if ((PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_DRAINED || PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_RUNNING) &&
 824                     (ssync->thread_info.state != PA_SINK_INPUT_DRAINED) && (ssync->thread_info.state != PA_SINK_INPUT_RUNNING))
 825                     pa_atomic_store(&ssync->thread_info.drained, 1);
 826                 ssync->thread_info.state = PA_PTR_TO_UINT(userdata);
 827             }
 828
 829             return 0;
 830         }
 831     }
 832
 833     return -1;
 834 }
 835
 836 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
 837     pa_sink_input_assert_ref(i);
 838
 839     if (i->state == PA_SINK_INPUT_RUNNING || i->state == PA_SINK_INPUT_DRAINED)
 840         return pa_atomic_load(&i->thread_info.drained) ? PA_SINK_INPUT_DRAINED : PA_SINK_INPUT_RUNNING;
 841
 842     return i->state;
 843 }