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_UNLINKED);
 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 = PA_SINK_INPUT_INIT;
 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->attach = NULL;
 200     i->detach = NULL;
 201     i->suspend = NULL;
 202     i->userdata = NULL;
 203
 204     i->thread_info.state = i->state;
 205     pa_atomic_store(&i->thread_info.drained, 1);
 206     i->thread_info.sample_spec = i->sample_spec;
 207     i->thread_info.silence_memblock = NULL;
 208     i->thread_info.move_silence = 0;
 209     pa_memchunk_reset(&i->thread_info.resampled_chunk);
 210     i->thread_info.resampler = resampler;
 211     i->thread_info.volume = i->volume;
 212     i->thread_info.muted = i->muted;
 213
 214     pa_assert_se(pa_idxset_put(core->sink_inputs, pa_sink_input_ref(i), &i->index) == 0);
 215     pa_assert_se(pa_idxset_put(i->sink->inputs, i, NULL) == 0);
 216
 217     pa_log_info("Created input %u \"%s\" on %s with sample spec %s",
 218                 i->index,
 219                 i->name,
 220                 i->sink->name,
 221                 pa_sample_spec_snprint(st, sizeof(st), &i->sample_spec));
 222
 223     /* Don't forget to call pa_sink_input_put! */
 224
 225     return i;
 226 }
 227
 228 static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
 229     pa_sink_input *ssync;
 230     pa_assert(i);
 231
 232     if (state == PA_SINK_INPUT_DRAINED)
 233         state = PA_SINK_INPUT_RUNNING;
 234
 235     if (i->state == state)
 236         return 0;
 237
 238     if (pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 239         return -1;
 240
 241     i->state = state;
 242     for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev)
 243         ssync->state = state;
 244     for (ssync = i->sync_next; ssync; ssync = ssync->sync_next)
 245         ssync->state = state;
 246
 247     return 0;
 248 }
 249
 250 void pa_sink_input_unlink(pa_sink_input *i) {
 251     pa_assert(i);
 252     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 253
 254     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], i);
 255
 256     if (i->sync_prev)
 257         i->sync_prev->sync_next = i->sync_next;
 258     if (i->sync_next)
 259         i->sync_next->sync_prev = i->sync_prev;
 260
 261     i->sync_prev = i->sync_next = NULL;
 262
 263     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT, i, 0, NULL);
 264     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
 265     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
 266
 267     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 268
 269     sink_input_set_state(i, PA_SINK_INPUT_UNLINKED);
 270     pa_sink_update_status(i->sink);
 271
 272     i->peek = NULL;
 273     i->drop = NULL;
 274     i->kill = NULL;
 275     i->get_latency = NULL;
 276     i->attach = NULL;
 277     i->detach = NULL;
 278     i->suspend = NULL;
 279
 280     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK_POST], i);
 281     i->sink = NULL;
 282     pa_sink_input_unref(i);
 283 }
 284
 285 static void sink_input_free(pa_object *o) {
 286     pa_sink_input* i = PA_SINK_INPUT(o);
 287
 288     pa_assert(i);
 289     pa_assert(pa_sink_input_refcnt(i) == 0);
 290
 291     if (PA_SINK_INPUT_LINKED(i->state))
 292         pa_sink_input_unlink(i);
 293
 294     pa_log_info("Freeing output %u \"%s\"", i->index, i->name);
 295
 296     if (i->thread_info.resampled_chunk.memblock)
 297         pa_memblock_unref(i->thread_info.resampled_chunk.memblock);
 298
 299     if (i->thread_info.resampler)
 300         pa_resampler_free(i->thread_info.resampler);
 301
 302     if (i->thread_info.silence_memblock)
 303         pa_memblock_unref(i->thread_info.silence_memblock);
 304
 305     pa_xfree(i->name);
 306     pa_xfree(i->driver);
 307     pa_xfree(i);
 308 }
 309
 310 void pa_sink_input_put(pa_sink_input *i) {
 311     pa_sink_input_assert_ref(i);
 312
 313     pa_assert(i->state == PA_SINK_INPUT_INIT);
 314     pa_assert(i->peek);
 315     pa_assert(i->drop);
 316
 317     i->thread_info.state = i->state = i->flags & PA_SINK_INPUT_START_CORKED ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 318     i->thread_info.volume = i->volume;
 319     i->thread_info.muted = i->muted;
 320
 321     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL);
 322     pa_sink_update_status(i->sink);
 323
 324     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
 325     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
 326
 327     /* Please note that if you change something here, you have to
 328        change something in pa_sink_input_move() with the ghost stream
 329        registration too. */
 330 }
 331
 332 void pa_sink_input_kill(pa_sink_input*i) {
 333     pa_sink_input_assert_ref(i);
 334     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 335
 336     if (i->kill)
 337         i->kill(i);
 338 }
 339
 340 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i) {
 341     pa_usec_t r = 0;
 342
 343     pa_sink_input_assert_ref(i);
 344     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 345
 346     if (pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
 347         r = 0;
 348
 349     if (i->get_latency)
 350         r += i->get_latency(i);
 351
 352     return r;
 353 }
 354
 355 /* Called from thread context */
 356 int pa_sink_input_peek(pa_sink_input *i, pa_memchunk *chunk, pa_cvolume *volume) {
 357     int ret = -1;
 358     int do_volume_adj_here;
 359     int volume_is_norm;
 360
 361     pa_sink_input_assert_ref(i);
 362     pa_assert(PA_SINK_INPUT_LINKED(i->thread_info.state));
 363     pa_assert(chunk);
 364     pa_assert(volume);
 365
 366     if (!i->peek || !i->drop || i->thread_info.state == PA_SINK_INPUT_UNLINKED || i->thread_info.state == PA_SINK_INPUT_CORKED)
 367         goto finish;
 368
 369     pa_assert(i->thread_info.state == PA_SINK_INPUT_RUNNING || i->thread_info.state == PA_SINK_INPUT_DRAINED);
 370
 371     if (i->thread_info.move_silence > 0) {
 372         size_t l;
 373
 374         /* We have just been moved and shall play some silence for a
 375          * while until the old sink has drained its playback buffer */
 376
 377         if (!i->thread_info.silence_memblock)
 378             i->thread_info.silence_memblock = pa_silence_memblock_new(i->sink->core->mempool, &i->sink->sample_spec, SILENCE_BUFFER_LENGTH);
 379
 380         chunk->memblock = pa_memblock_ref(i->thread_info.silence_memblock);
 381         chunk->index = 0;
 382         l = pa_memblock_get_length(chunk->memblock);
 383         chunk->length = i->thread_info.move_silence < l ? i->thread_info.move_silence : l;
 384
 385         ret = 0;
 386         do_volume_adj_here = 1;
 387         goto finish;
 388     }
 389
 390     if (!i->thread_info.resampler) {
 391         do_volume_adj_here = 0; /* FIXME??? */
 392         ret = i->peek(i, chunk);
 393         goto finish;
 394     }
 395
 396     do_volume_adj_here = !pa_channel_map_equal(&i->channel_map, &i->sink->channel_map);
 397     volume_is_norm = pa_cvolume_is_norm(&i->thread_info.volume) && !i->thread_info.muted;
 398
 399     while (!i->thread_info.resampled_chunk.memblock) {
 400         pa_memchunk tchunk;
 401         size_t l;
 402
 403         if ((ret = i->peek(i, &tchunk)) < 0)
 404             goto finish;
 405
 406         pa_assert(tchunk.length > 0);
 407
 408         l = pa_resampler_request(i->thread_info.resampler, CONVERT_BUFFER_LENGTH);
 409
 410         if (tchunk.length > l)
 411             tchunk.length = l;
 412
 413         i->drop(i, tchunk.length);
 414
 415         /* It might be necessary to adjust the volume here */
 416         if (do_volume_adj_here && !volume_is_norm) {
 417             pa_memchunk_make_writable(&tchunk, 0);
 418
 419             if (i->thread_info.muted)
 420                 pa_silence_memchunk(&tchunk, &i->thread_info.sample_spec);
 421             else
 422                 pa_volume_memchunk(&tchunk, &i->thread_info.sample_spec, &i->thread_info.volume);
 423         }
 424
 425         pa_resampler_run(i->thread_info.resampler, &tchunk, &i->thread_info.resampled_chunk);
 426         pa_memblock_unref(tchunk.memblock);
 427     }
 428
 429     pa_assert(i->thread_info.resampled_chunk.memblock);
 430     pa_assert(i->thread_info.resampled_chunk.length > 0);
 431
 432     *chunk = i->thread_info.resampled_chunk;
 433     pa_memblock_ref(i->thread_info.resampled_chunk.memblock);
 434
 435     ret = 0;
 436
 437 finish:
 438
 439     if (ret >= 0)
 440         pa_atomic_store(&i->thread_info.drained, 0);
 441     else if (ret < 0)
 442         pa_atomic_store(&i->thread_info.drained, 1);
 443
 444     if (ret >= 0) {
 445         /* Let's see if we had to apply the volume adjustment
 446          * ourselves, or if this can be done by the sink for us */
 447
 448         if (do_volume_adj_here)
 449             /* We had different channel maps, so we already did the adjustment */
 450             pa_cvolume_reset(volume, i->sink->sample_spec.channels);
 451         else if (i->thread_info.muted)
 452             /* We've both the same channel map, so let's have the sink do the adjustment for us*/
 453             pa_cvolume_mute(volume, i->sink->sample_spec.channels);
 454         else
 455             *volume = i->thread_info.volume;
 456     }
 457
 458     return ret;
 459 }
 460
 461 /* Called from thread context */
 462 void pa_sink_input_drop(pa_sink_input *i, size_t length) {
 463     pa_sink_input_assert_ref(i);
 464     pa_assert(PA_SINK_INPUT_LINKED(i->thread_info.state));
 465     pa_assert(length > 0);
 466
 467     if (i->thread_info.move_silence > 0) {
 468
 469         if (i->thread_info.move_silence >= length) {
 470             i->thread_info.move_silence -= length;
 471             length = 0;
 472         } else {
 473             length -= i->thread_info.move_silence;
 474             i->thread_info.move_silence = 0;
 475         }
 476
 477         if (i->thread_info.move_silence <= 0) {
 478             pa_assert(i->thread_info.silence_memblock);
 479             pa_memblock_unref(i->thread_info.silence_memblock);
 480             i->thread_info.silence_memblock = NULL;
 481         }
 482
 483         if (length <= 0)
 484             return;
 485     }
 486
 487     if (i->thread_info.resampled_chunk.memblock) {
 488         size_t l = length;
 489
 490         if (l > i->thread_info.resampled_chunk.length)
 491             l = i->thread_info.resampled_chunk.length;
 492
 493         i->thread_info.resampled_chunk.index += l;
 494         i->thread_info.resampled_chunk.length -= l;
 495
 496         if (i->thread_info.resampled_chunk.length <= 0) {
 497             pa_memblock_unref(i->thread_info.resampled_chunk.memblock);
 498             pa_memchunk_reset(&i->thread_info.resampled_chunk);
 499         }
 500
 501         length -= l;
 502     }
 503
 504     if (length > 0) {
 505
 506         if (i->thread_info.resampler) {
 507             /* So, we have a resampler. To avoid discontinuities we
 508              * have to actually read all data that could be read and
 509              * pass it through the resampler. */
 510
 511             while (length > 0) {
 512                 pa_memchunk chunk;
 513                 pa_cvolume volume;
 514
 515                 if (pa_sink_input_peek(i, &chunk, &volume) >= 0) {
 516                     size_t l;
 517
 518                     pa_memblock_unref(chunk.memblock);
 519
 520                     l = chunk.length;
 521                     if (l > length)
 522                         l = length;
 523
 524                     pa_sink_input_drop(i, l);
 525                     length -= l;
 526
 527                 } else {
 528                     size_t l;
 529
 530                     /* Hmmm, peeking failed, so let's at least drop
 531                      * the right amount of data */
 532
 533                     if ((l = pa_resampler_request(i->thread_info.resampler, length)) > 0)
 534                         if (i->drop)
 535                             i->drop(i, l);
 536
 537                     break;
 538                 }
 539             }
 540
 541         } else {
 542
 543             /* We have no resampler, hence let's just drop the data */
 544
 545             if (i->drop)
 546                 i->drop(i, length);
 547         }
 548     }
 549 }
 550
 551 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume) {
 552     pa_sink_input_assert_ref(i);
 553     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 554
 555     if (pa_cvolume_equal(&i->volume, volume))
 556         return;
 557
 558     i->volume = *volume;
 559
 560     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);
 561     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 562 }
 563
 564 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
 565     pa_sink_input_assert_ref(i);
 566     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 567
 568     return &i->volume;
 569 }
 570
 571 void pa_sink_input_set_mute(pa_sink_input *i, int mute) {
 572     pa_assert(i);
 573     pa_sink_input_assert_ref(i);
 574     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 575
 576     if (!i->muted == !mute)
 577         return;
 578
 579     i->muted = mute;
 580
 581     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 582     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 583 }
 584
 585 int pa_sink_input_get_mute(pa_sink_input *i) {
 586     pa_sink_input_assert_ref(i);
 587     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 588
 589     return !!i->muted;
 590 }
 591
 592 void pa_sink_input_cork(pa_sink_input *i, int b) {
 593     pa_sink_input_assert_ref(i);
 594     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 595
 596     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 597 }
 598
 599 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
 600     pa_sink_input_assert_ref(i);
 601     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 602     pa_return_val_if_fail(i->thread_info.resampler, -1);
 603
 604     if (i->sample_spec.rate == rate)
 605         return 0;
 606
 607     i->sample_spec.rate = rate;
 608
 609     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 610
 611     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 612     return 0;
 613 }
 614
 615 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
 616     pa_sink_input_assert_ref(i);
 617
 618     if (!i->name && !name)
 619         return;
 620
 621     if (i->name && name && !strcmp(i->name, name))
 622         return;
 623
 624     pa_xfree(i->name);
 625     i->name = pa_xstrdup(name);
 626
 627     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 628 }
 629
 630 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
 631     pa_sink_input_assert_ref(i);
 632
 633     return i->resample_method;
 634 }
 635
 636 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately) {
 637     pa_resampler *new_resampler = NULL;
 638     pa_sink *origin;
 639     pa_usec_t silence_usec = 0;
 640     pa_sink_input_move_info info;
 641
 642     pa_sink_input_assert_ref(i);
 643     pa_assert(PA_SINK_INPUT_LINKED(i->state));
 644     pa_sink_assert_ref(dest);
 645
 646     origin = i->sink;
 647
 648     if (dest == origin)
 649         return 0;
 650
 651     if (i->flags & PA_SINK_INPUT_DONT_MOVE)
 652         return -1;
 653
 654     if (i->sync_next || i->sync_prev) {
 655         pa_log_warn("Moving synchronised streams not supported.");
 656         return -1;
 657     }
 658
 659     if (pa_idxset_size(dest->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 660         pa_log_warn("Failed to move sink input: too many inputs per sink.");
 661         return -1;
 662     }
 663
 664     if (i->thread_info.resampler &&
 665         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 666         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 667
 668         /* Try to reuse the old resampler if possible */
 669         new_resampler = i->thread_info.resampler;
 670
 671     else if ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 672              !pa_sample_spec_equal(&i->sample_spec, &dest->sample_spec) ||
 673              !pa_channel_map_equal(&i->channel_map, &dest->channel_map)) {
 674
 675         /* Okey, we need a new resampler for the new sink */
 676
 677         if (!(new_resampler = pa_resampler_new(
 678                       dest->core->mempool,
 679                       &i->sample_spec, &i->channel_map,
 680                       &dest->sample_spec, &dest->channel_map,
 681                       i->resample_method,
 682                       !!(i->flags & PA_SINK_INPUT_VARIABLE_RATE)))) {
 683             pa_log_warn("Unsupported resampling operation.");
 684             return -1;
 685         }
 686     }
 687
 688     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE], i);
 689
 690     memset(&info, 0, sizeof(info));
 691     info.sink_input = i;
 692
 693     if (!immediately) {
 694         pa_usec_t old_latency, new_latency;
 695
 696         /* Let's do a little bit of Voodoo for compensating latency
 697          * differences. We assume that the accuracy for our
 698          * estimations is still good enough, even though we do these
 699          * operations non-atomic. */
 700
 701         old_latency = pa_sink_get_latency(origin);
 702         new_latency = pa_sink_get_latency(dest);
 703
 704         /* The already resampled data should go to the old sink */
 705
 706         if (old_latency >= new_latency) {
 707
 708             /* The latency of the old sink is larger than the latency
 709              * of the new sink. Therefore to compensate for the
 710              * difference we to play silence on the new one for a
 711              * while */
 712
 713             silence_usec = old_latency - new_latency;
 714
 715         } else {
 716
 717             /* The latency of new sink is larger than the latency of
 718              * the old sink. Therefore we have to precompute a little
 719              * and make sure that this is still played on the old
 720              * sink, until we can play the first sample on the new
 721              * sink.*/
 722
 723             info.buffer_bytes = pa_usec_to_bytes(new_latency - old_latency, &origin->sample_spec);
 724         }
 725
 726         /* Okey, let's move it */
 727
 728         if (info.buffer_bytes > 0) {
 729
 730             info.ghost_sink_input = pa_memblockq_sink_input_new(
 731                     origin,
 732                     "Ghost Stream",
 733                     &origin->sample_spec,
 734                     &origin->channel_map,
 735                     NULL,
 736                     NULL);
 737
 738             info.buffer = pa_memblockq_new(0, MOVE_BUFFER_LENGTH, 0, pa_frame_size(&origin->sample_spec), 0, 0, NULL);
 739         }
 740     }
 741
 742     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT_AND_BUFFER, &info, 0, NULL);
 743
 744     if (info.ghost_sink_input) {
 745         /* Basically, do what pa_sink_input_put() does ...*/
 746         info.ghost_sink_input->thread_info.state = info.ghost_sink_input->state = PA_SINK_INPUT_RUNNING;
 747         info.ghost_sink_input->thread_info.volume = info.ghost_sink_input->volume;
 748         info.ghost_sink_input->thread_info.muted = info.ghost_sink_input->muted;
 749
 750         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, info.ghost_sink_input->index);
 751         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], info.ghost_sink_input);
 752         pa_sink_input_unref(info.ghost_sink_input);
 753     }
 754
 755     pa_idxset_remove_by_data(origin->inputs, i, NULL);
 756     pa_idxset_put(dest->inputs, i, NULL);
 757     i->sink = dest;
 758
 759     /* Replace resampler */
 760     if (new_resampler != i->thread_info.resampler) {
 761         if (i->thread_info.resampler)
 762             pa_resampler_free(i->thread_info.resampler);
 763         i->thread_info.resampler = new_resampler;
 764
 765         /* if the resampler changed, the silence memblock is
 766          * probably invalid now, too */
 767         if (i->thread_info.silence_memblock) {
 768             pa_memblock_unref(i->thread_info.silence_memblock);
 769             i->thread_info.silence_memblock = NULL;
 770         }
 771     }
 772
 773     /* Dump already resampled data */
 774     if (i->thread_info.resampled_chunk.memblock) {
 775         /* Hmm, this data has already been added to the ghost queue, presumably, hence let's sleep a little bit longer */
 776         silence_usec += pa_bytes_to_usec(i->thread_info.resampled_chunk.length, &origin->sample_spec);
 777         pa_memblock_unref(i->thread_info.resampled_chunk.memblock);
 778         pa_memchunk_reset(&i->thread_info.resampled_chunk);
 779     }
 780
 781     /* Calculate the new sleeping time */
 782     if (immediately)
 783         i->thread_info.move_silence = 0;
 784     else
 785         i->thread_info.move_silence = pa_usec_to_bytes(
 786                 pa_bytes_to_usec(i->thread_info.move_silence, &i->sample_spec) +
 787                 silence_usec,
 788                 &i->sample_spec);
 789
 790     pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL);
 791
 792     pa_sink_update_status(origin);
 793     pa_sink_update_status(dest);
 794
 795     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_POST], i);
 796
 797     pa_log_debug("Successfully moved sink input %i from %s to %s.", i->index, origin->name, dest->name);
 798
 799     /* Notify everyone */
 800     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 801
 802     return 0;
 803 }
 804
 805 /* Called from thread context */
 806 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 807     pa_sink_input *i = PA_SINK_INPUT(o);
 808
 809     pa_sink_input_assert_ref(i);
 810     pa_assert(PA_SINK_INPUT_LINKED(i->thread_info.state));
 811
 812     switch (code) {
 813         case PA_SINK_INPUT_MESSAGE_SET_VOLUME:
 814             i->thread_info.volume = *((pa_cvolume*) userdata);
 815             return 0;
 816
 817         case PA_SINK_INPUT_MESSAGE_SET_MUTE:
 818             i->thread_info.muted = PA_PTR_TO_UINT(userdata);
 819             return 0;
 820
 821         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
 822             pa_usec_t *r = userdata;
 823
 824             if (i->thread_info.resampled_chunk.memblock)
 825                 *r += pa_bytes_to_usec(i->thread_info.resampled_chunk.length, &i->sink->sample_spec);
 826
 827             if (i->thread_info.move_silence)
 828                 *r += pa_bytes_to_usec(i->thread_info.move_silence, &i->sink->sample_spec);
 829
 830             return 0;
 831         }
 832
 833         case PA_SINK_INPUT_MESSAGE_SET_RATE:
 834
 835             i->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 836             pa_resampler_set_input_rate(i->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 837
 838             return 0;
 839
 840         case PA_SINK_INPUT_MESSAGE_SET_STATE: {
 841             pa_sink_input *ssync;
 842
 843             if ((PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_DRAINED || PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_RUNNING) &&
 844                 (i->thread_info.state != PA_SINK_INPUT_DRAINED) && (i->thread_info.state != PA_SINK_INPUT_RUNNING))
 845                 pa_atomic_store(&i->thread_info.drained, 1);
 846
 847             i->thread_info.state = PA_PTR_TO_UINT(userdata);
 848
 849             for (ssync = i->thread_info.sync_prev; ssync; ssync = ssync->thread_info.sync_prev) {
 850                 if ((PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_DRAINED || PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_RUNNING) &&
 851                     (ssync->thread_info.state != PA_SINK_INPUT_DRAINED) && (ssync->thread_info.state != PA_SINK_INPUT_RUNNING))
 852                     pa_atomic_store(&ssync->thread_info.drained, 1);
 853                 ssync->thread_info.state = PA_PTR_TO_UINT(userdata);
 854             }
 855
 856             for (ssync = i->thread_info.sync_next; ssync; ssync = ssync->thread_info.sync_next) {
 857                 if ((PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_DRAINED || PA_PTR_TO_UINT(userdata) == PA_SINK_INPUT_RUNNING) &&
 858                     (ssync->thread_info.state != PA_SINK_INPUT_DRAINED) && (ssync->thread_info.state != PA_SINK_INPUT_RUNNING))
 859                     pa_atomic_store(&ssync->thread_info.drained, 1);
 860                 ssync->thread_info.state = PA_PTR_TO_UINT(userdata);
 861             }
 862
 863             return 0;
 864         }
 865     }
 866
 867     return -1;
 868 }
 869
 870 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
 871     pa_sink_input_assert_ref(i);
 872
 873     if (i->state == PA_SINK_INPUT_RUNNING || i->state == PA_SINK_INPUT_DRAINED)
 874         return pa_atomic_load(&i->thread_info.drained) ? PA_SINK_INPUT_DRAINED : PA_SINK_INPUT_RUNNING;
 875
 876     return i->state;
 877 }
 878