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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include <pulse/utf8.h>
  32 #include <pulse/xmalloc.h>
  33
  34 #include <pulsecore/sample-util.h>
  35 #include <pulsecore/core-subscribe.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/play-memblockq.h>
  38 #include <pulsecore/namereg.h>
  39 #include <pulsecore/core-util.h>
  40
  41 #include "sink-input.h"
  42
  43 #define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
  44 #define CONVERT_BUFFER_LENGTH (PA_PAGE_SIZE)
  45
  46 static PA_DEFINE_CHECK_TYPE(pa_sink_input, pa_msgobject);
  47
  48 static void sink_input_free(pa_object *o);
  49
  50 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data) {
  51     pa_assert(data);
  52
  53     memset(data, 0, sizeof(*data));
  54     data->resample_method = PA_RESAMPLER_INVALID;
  55     data->proplist = pa_proplist_new();
  56
  57     return data;
  58 }
  59
  60 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec) {
  61     pa_assert(data);
  62
  63     if ((data->sample_spec_is_set = !!spec))
  64         data->sample_spec = *spec;
  65 }
  66
  67 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map) {
  68     pa_assert(data);
  69
  70     if ((data->channel_map_is_set = !!map))
  71         data->channel_map = *map;
  72 }
  73
  74 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume) {
  75     pa_assert(data);
  76
  77     if ((data->volume_is_set = !!volume))
  78         data->volume = data->virtual_volume = *volume;
  79 }
  80
  81 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, pa_bool_t mute) {
  82     pa_assert(data);
  83
  84     data->muted_is_set = TRUE;
  85     data->muted = !!mute;
  86 }
  87
  88 void pa_sink_input_new_data_done(pa_sink_input_new_data *data) {
  89     pa_assert(data);
  90
  91     pa_proplist_free(data->proplist);
  92 }
  93
  94 /* Called from main context */
  95 static void reset_callbacks(pa_sink_input *i) {
  96     pa_assert(i);
  97
  98     i->pop = NULL;
  99     i->process_rewind = NULL;
 100     i->update_max_rewind = NULL;
 101     i->update_max_request = NULL;
 102     i->update_sink_requested_latency = NULL;
 103     i->update_sink_latency_range = NULL;
 104     i->attach = NULL;
 105     i->detach = NULL;
 106     i->suspend = NULL;
 107     i->moved = NULL;
 108     i->kill = NULL;
 109     i->get_latency = NULL;
 110     i->state_change = NULL;
 111     i->may_move_to = NULL;
 112 }
 113
 114 /* Called from main context */
 115 pa_sink_input* pa_sink_input_new(
 116         pa_core *core,
 117         pa_sink_input_new_data *data,
 118         pa_sink_input_flags_t flags) {
 119
 120     pa_sink_input *i;
 121     pa_resampler *resampler = NULL;
 122     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 123     pa_channel_map original_cm;
 124
 125     pa_assert(core);
 126     pa_assert(data);
 127
 128     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_INPUT_NEW], data) < 0)
 129         return NULL;
 130
 131     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 132
 133     if (!data->sink)
 134         data->sink = pa_namereg_get(core, NULL, PA_NAMEREG_SINK, TRUE);
 135
 136     pa_return_null_if_fail(data->sink);
 137     pa_return_null_if_fail(pa_sink_get_state(data->sink) != PA_SINK_UNLINKED);
 138     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));
 139
 140     if (!data->sample_spec_is_set)
 141         data->sample_spec = data->sink->sample_spec;
 142
 143     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
 144
 145     if (!data->channel_map_is_set) {
 146         if (pa_channel_map_compatible(&data->sink->channel_map, &data->sample_spec))
 147             data->channel_map = data->sink->channel_map;
 148         else
 149             pa_channel_map_init_extend(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 150     }
 151
 152     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 153     pa_return_null_if_fail(pa_channel_map_compatible(&data->channel_map, &data->sample_spec));
 154
 155     if (!data->volume_is_set) {
 156         pa_cvolume_reset(&data->volume, data->sample_spec.channels);
 157         pa_cvolume_reset(&data->virtual_volume, data->sample_spec.channels);
 158     }
 159
 160     pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
 161     pa_return_null_if_fail(pa_cvolume_compatible(&data->volume, &data->sample_spec));
 162
 163     pa_return_null_if_fail(pa_cvolume_valid(&data->virtual_volume));
 164     pa_return_null_if_fail(pa_cvolume_compatible(&data->virtual_volume, &data->sample_spec));
 165
 166     if (!data->muted_is_set)
 167         data->muted = FALSE;
 168
 169     if (flags & PA_SINK_INPUT_FIX_FORMAT)
 170         data->sample_spec.format = data->sink->sample_spec.format;
 171
 172     if (flags & PA_SINK_INPUT_FIX_RATE)
 173         data->sample_spec.rate = data->sink->sample_spec.rate;
 174
 175     original_cm = data->channel_map;
 176
 177     if (flags & PA_SINK_INPUT_FIX_CHANNELS) {
 178         data->sample_spec.channels = data->sink->sample_spec.channels;
 179         data->channel_map = data->sink->channel_map;
 180     }
 181
 182     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 183     pa_assert(pa_channel_map_valid(&data->channel_map));
 184
 185     /* Due to the fixing of the sample spec the volume might not match anymore */
 186     pa_cvolume_remap(&data->volume, &original_cm, &data->channel_map);
 187
 188     if (data->resample_method == PA_RESAMPLER_INVALID)
 189         data->resample_method = core->resample_method;
 190
 191     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 192
 193     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_INPUT_FIXATE], data) < 0)
 194         return NULL;
 195
 196     if (pa_idxset_size(data->sink->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 197         pa_log_warn("Failed to create sink input: too many inputs per sink.");
 198         return NULL;
 199     }
 200
 201     if ((flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 202         !pa_sample_spec_equal(&data->sample_spec, &data->sink->sample_spec) ||
 203         !pa_channel_map_equal(&data->channel_map, &data->sink->channel_map)) {
 204
 205         if (!(resampler = pa_resampler_new(
 206                       core->mempool,
 207                       &data->sample_spec, &data->channel_map,
 208                       &data->sink->sample_spec, &data->sink->channel_map,
 209                       data->resample_method,
 210                       ((flags & PA_SINK_INPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 211                       ((flags & PA_SINK_INPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 212                       (core->disable_remixing || (flags & PA_SINK_INPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0) |
 213                       (core->disable_lfe_remixing ? PA_RESAMPLER_NO_LFE : 0)))) {
 214             pa_log_warn("Unsupported resampling operation.");
 215             return NULL;
 216         }
 217
 218         data->resample_method = pa_resampler_get_method(resampler);
 219     }
 220
 221     i = pa_msgobject_new(pa_sink_input);
 222     i->parent.parent.free = sink_input_free;
 223     i->parent.process_msg = pa_sink_input_process_msg;
 224
 225     i->core = core;
 226     i->state = PA_SINK_INPUT_INIT;
 227     i->flags = flags;
 228     i->proplist = pa_proplist_copy(data->proplist);
 229     i->driver = pa_xstrdup(data->driver);
 230     i->module = data->module;
 231     i->sink = data->sink;
 232     i->client = data->client;
 233
 234     i->resample_method = data->resample_method;
 235     i->sample_spec = data->sample_spec;
 236     i->channel_map = data->channel_map;
 237
 238     i->virtual_volume = data->virtual_volume;
 239     i->volume = data->volume;
 240
 241     i->muted = data->muted;
 242
 243     if (data->sync_base) {
 244         i->sync_next = data->sync_base->sync_next;
 245         i->sync_prev = data->sync_base;
 246
 247         if (data->sync_base->sync_next)
 248             data->sync_base->sync_next->sync_prev = i;
 249         data->sync_base->sync_next = i;
 250     } else
 251         i->sync_next = i->sync_prev = NULL;
 252
 253     i->direct_outputs = pa_idxset_new(NULL, NULL);
 254
 255     reset_callbacks(i);
 256     i->userdata = NULL;
 257
 258     i->thread_info.state = i->state;
 259     i->thread_info.attached = FALSE;
 260     pa_atomic_store(&i->thread_info.drained, 1);
 261     i->thread_info.sample_spec = i->sample_spec;
 262     i->thread_info.resampler = resampler;
 263     i->thread_info.volume = i->volume;
 264     i->thread_info.muted = i->muted;
 265     i->thread_info.requested_sink_latency = (pa_usec_t) -1;
 266     i->thread_info.rewrite_nbytes = 0;
 267     i->thread_info.rewrite_flush = FALSE;
 268     i->thread_info.underrun_for = (uint64_t) -1;
 269     i->thread_info.playing_for = 0;
 270     i->thread_info.direct_outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 271
 272     i->thread_info.render_memblockq = pa_memblockq_new(
 273             0,
 274             MEMBLOCKQ_MAXLENGTH,
 275             0,
 276             pa_frame_size(&i->sink->sample_spec),
 277             0,
 278             1,
 279             0,
 280             &i->sink->silence);
 281
 282     pa_assert_se(pa_idxset_put(core->sink_inputs, pa_sink_input_ref(i), &i->index) == 0);
 283     pa_assert_se(pa_idxset_put(i->sink->inputs, i, NULL) == 0);
 284
 285     pa_log_info("Created input %u \"%s\" on %s with sample spec %s and channel map %s",
 286                 i->index,
 287                 pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME)),
 288                 i->sink->name,
 289                 pa_sample_spec_snprint(st, sizeof(st), &i->sample_spec),
 290                 pa_channel_map_snprint(cm, sizeof(cm), &i->channel_map));
 291
 292     /* Don't forget to call pa_sink_input_put! */
 293
 294     return i;
 295 }
 296
 297 /* Called from main context */
 298 static void update_n_corked(pa_sink_input *i, pa_sink_input_state_t state) {
 299     pa_assert(i);
 300
 301     if (i->state == PA_SINK_INPUT_CORKED && state != PA_SINK_INPUT_CORKED)
 302         pa_assert_se(i->sink->n_corked -- >= 1);
 303     else if (i->state != PA_SINK_INPUT_CORKED && state == PA_SINK_INPUT_CORKED)
 304         i->sink->n_corked++;
 305
 306     pa_sink_update_status(i->sink);
 307 }
 308
 309 /* Called from main context */
 310 static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
 311     pa_sink_input *ssync;
 312     pa_assert(i);
 313
 314     if (state == PA_SINK_INPUT_DRAINED)
 315         state = PA_SINK_INPUT_RUNNING;
 316
 317     if (i->state == state)
 318         return 0;
 319
 320     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) == 0);
 321
 322     update_n_corked(i, state);
 323     i->state = state;
 324
 325     for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev) {
 326         update_n_corked(ssync, state);
 327         ssync->state = state;
 328     }
 329     for (ssync = i->sync_next; ssync; ssync = ssync->sync_next) {
 330         update_n_corked(ssync, state);
 331         ssync->state = state;
 332     }
 333
 334     if (state != PA_SINK_INPUT_UNLINKED) {
 335         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], i);
 336
 337         for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev)
 338             pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 339
 340         for (ssync = i->sync_next; ssync; ssync = ssync->sync_next)
 341             pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 342     }
 343
 344     return 0;
 345 }
 346
 347 /* Called from main context */
 348 void pa_sink_input_unlink(pa_sink_input *i) {
 349     pa_bool_t linked;
 350     pa_source_output *o, *p =  NULL;
 351     pa_assert(i);
 352
 353     /* See pa_sink_unlink() for a couple of comments how this function
 354      * works */
 355
 356     pa_sink_input_ref(i);
 357
 358     linked = PA_SINK_INPUT_IS_LINKED(i->state);
 359
 360     if (linked)
 361         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], i);
 362
 363     if (i->sync_prev)
 364         i->sync_prev->sync_next = i->sync_next;
 365     if (i->sync_next)
 366         i->sync_next->sync_prev = i->sync_prev;
 367
 368     i->sync_prev = i->sync_next = NULL;
 369
 370     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
 371     if (pa_idxset_remove_by_data(i->sink->inputs, i, NULL))
 372         pa_sink_input_unref(i);
 373
 374     while ((o = pa_idxset_first(i->direct_outputs, NULL))) {
 375         pa_assert(o != p);
 376         pa_source_output_kill(o);
 377         p = o;
 378     }
 379
 380     update_n_corked(i, PA_SINK_INPUT_UNLINKED);
 381     i->state = PA_SINK_INPUT_UNLINKED;
 382
 383     if (linked)
 384         if (i->sink->asyncmsgq)
 385             pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT, i, 0, NULL) == 0);
 386
 387     reset_callbacks(i);
 388
 389     if (linked) {
 390         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 391         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK_POST], i);
 392     }
 393
 394     i->sink = NULL;
 395     pa_sink_input_unref(i);
 396 }
 397
 398 /* Called from main context */
 399 static void sink_input_free(pa_object *o) {
 400     pa_sink_input* i = PA_SINK_INPUT(o);
 401
 402     pa_assert(i);
 403     pa_assert(pa_sink_input_refcnt(i) == 0);
 404
 405     if (PA_SINK_INPUT_IS_LINKED(i->state))
 406         pa_sink_input_unlink(i);
 407
 408     pa_log_info("Freeing input %u \"%s\"", i->index, pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME)));
 409
 410     pa_assert(!i->thread_info.attached);
 411
 412     if (i->thread_info.render_memblockq)
 413         pa_memblockq_free(i->thread_info.render_memblockq);
 414
 415     if (i->thread_info.resampler)
 416         pa_resampler_free(i->thread_info.resampler);
 417
 418     if (i->proplist)
 419         pa_proplist_free(i->proplist);
 420
 421     if (i->direct_outputs)
 422         pa_idxset_free(i->direct_outputs, NULL, NULL);
 423
 424     if (i->thread_info.direct_outputs)
 425         pa_hashmap_free(i->thread_info.direct_outputs, NULL, NULL);
 426
 427     pa_xfree(i->driver);
 428     pa_xfree(i);
 429 }
 430
 431 /* Called from main context */
 432 void pa_sink_input_put(pa_sink_input *i) {
 433     pa_sink_input_state_t state;
 434     pa_sink_input_assert_ref(i);
 435
 436     pa_assert(i->state == PA_SINK_INPUT_INIT);
 437
 438     /* The following fields must be initialized properly */
 439     pa_assert(i->pop);
 440     pa_assert(i->process_rewind);
 441     pa_assert(i->kill);
 442
 443     i->thread_info.volume = i->volume;
 444     i->thread_info.muted = i->muted;
 445
 446     state = i->flags & PA_SINK_INPUT_START_CORKED ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 447
 448     update_n_corked(i, state);
 449     i->state = state;
 450
 451     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL) == 0);
 452
 453     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
 454     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
 455 }
 456
 457 /* Called from main context */
 458 void pa_sink_input_kill(pa_sink_input*i) {
 459     pa_sink_input_assert_ref(i);
 460     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 461
 462     i->kill(i);
 463 }
 464
 465 /* Called from main context */
 466 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency) {
 467     pa_usec_t r[2] = { 0, 0 };
 468
 469     pa_sink_input_assert_ref(i);
 470     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 471
 472     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 473
 474     if (i->get_latency)
 475         r[0] += i->get_latency(i);
 476
 477     if (sink_latency)
 478         *sink_latency = r[1];
 479
 480     return r[0];
 481 }
 482
 483 /* Called from thread context */
 484 int pa_sink_input_peek(pa_sink_input *i, size_t slength /* in sink frames */, pa_memchunk *chunk, pa_cvolume *volume) {
 485     pa_bool_t do_volume_adj_here;
 486     pa_bool_t volume_is_norm;
 487     size_t block_size_max_sink, block_size_max_sink_input;
 488     size_t ilength;
 489
 490     pa_sink_input_assert_ref(i);
 491     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 492     pa_assert(pa_frame_aligned(slength, &i->sink->sample_spec));
 493     pa_assert(chunk);
 494     pa_assert(volume);
 495
 496 /*     pa_log_debug("peek"); */
 497
 498     if (!i->pop)
 499         return -1;
 500
 501     pa_assert(i->thread_info.state == PA_SINK_INPUT_RUNNING ||
 502               i->thread_info.state == PA_SINK_INPUT_CORKED ||
 503               i->thread_info.state == PA_SINK_INPUT_DRAINED);
 504
 505     block_size_max_sink_input = i->thread_info.resampler ?
 506         pa_resampler_max_block_size(i->thread_info.resampler) :
 507         pa_frame_align(pa_mempool_block_size_max(i->sink->core->mempool), &i->sample_spec);
 508
 509     block_size_max_sink = pa_frame_align(pa_mempool_block_size_max(i->sink->core->mempool), &i->sink->sample_spec);
 510
 511     /* Default buffer size */
 512     if (slength <= 0)
 513         slength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sink->sample_spec);
 514
 515     if (slength > block_size_max_sink)
 516         slength = block_size_max_sink;
 517
 518     if (i->thread_info.resampler) {
 519         ilength = pa_resampler_request(i->thread_info.resampler, slength);
 520
 521         if (ilength <= 0)
 522             ilength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sample_spec);
 523     } else
 524         ilength = slength;
 525
 526     if (ilength > block_size_max_sink_input)
 527         ilength = block_size_max_sink_input;
 528
 529     /* If the channel maps of the sink and this stream differ, we need
 530      * to adjust the volume *before* we resample. Otherwise we can do
 531      * it after and leave it for the sink code */
 532
 533     do_volume_adj_here = !pa_channel_map_equal(&i->channel_map, &i->sink->channel_map);
 534     volume_is_norm = pa_cvolume_is_norm(&i->thread_info.volume) && !i->thread_info.muted;
 535
 536     while (!pa_memblockq_is_readable(i->thread_info.render_memblockq)) {
 537         pa_memchunk tchunk;
 538
 539         /* There's nothing in our render queue. We need to fill it up
 540          * with data from the implementor. */
 541
 542         if (i->thread_info.state == PA_SINK_INPUT_CORKED ||
 543             i->pop(i, ilength, &tchunk) < 0) {
 544
 545             /* OK, we're corked or the implementor didn't give us any
 546              * data, so let's just hand out silence */
 547             pa_atomic_store(&i->thread_info.drained, 1);
 548
 549             pa_memblockq_seek(i->thread_info.render_memblockq, (int64_t) slength, PA_SEEK_RELATIVE);
 550             i->thread_info.playing_for = 0;
 551             if (i->thread_info.underrun_for != (uint64_t) -1)
 552                 i->thread_info.underrun_for += ilength;
 553             break;
 554         }
 555
 556         pa_atomic_store(&i->thread_info.drained, 0);
 557
 558         pa_assert(tchunk.length > 0);
 559         pa_assert(tchunk.memblock);
 560
 561         i->thread_info.underrun_for = 0;
 562         i->thread_info.playing_for += tchunk.length;
 563
 564         while (tchunk.length > 0) {
 565             pa_memchunk wchunk;
 566
 567             wchunk = tchunk;
 568             pa_memblock_ref(wchunk.memblock);
 569
 570             if (wchunk.length > block_size_max_sink_input)
 571                 wchunk.length = block_size_max_sink_input;
 572
 573             /* It might be necessary to adjust the volume here */
 574             if (do_volume_adj_here && !volume_is_norm) {
 575                 pa_memchunk_make_writable(&wchunk, 0);
 576
 577                 if (i->thread_info.muted)
 578                     pa_silence_memchunk(&wchunk, &i->thread_info.sample_spec);
 579                 else
 580                     pa_volume_memchunk(&wchunk, &i->thread_info.sample_spec, &i->thread_info.volume);
 581             }
 582
 583             if (!i->thread_info.resampler)
 584                 pa_memblockq_push_align(i->thread_info.render_memblockq, &wchunk);
 585             else {
 586                 pa_memchunk rchunk;
 587                 pa_resampler_run(i->thread_info.resampler, &wchunk, &rchunk);
 588
 589 /*                 pa_log_debug("pushing %lu", (unsigned long) rchunk.length); */
 590
 591                 if (rchunk.memblock) {
 592                     pa_memblockq_push_align(i->thread_info.render_memblockq, &rchunk);
 593                     pa_memblock_unref(rchunk.memblock);
 594                 }
 595             }
 596
 597             pa_memblock_unref(wchunk.memblock);
 598
 599             tchunk.index += wchunk.length;
 600             tchunk.length -= wchunk.length;
 601         }
 602
 603         pa_memblock_unref(tchunk.memblock);
 604     }
 605
 606     pa_assert_se(pa_memblockq_peek(i->thread_info.render_memblockq, chunk) >= 0);
 607
 608     pa_assert(chunk->length > 0);
 609     pa_assert(chunk->memblock);
 610
 611 /*     pa_log_debug("peeking %lu", (unsigned long) chunk->length); */
 612
 613     if (chunk->length > block_size_max_sink)
 614         chunk->length = block_size_max_sink;
 615
 616     /* Let's see if we had to apply the volume adjustment ourselves,
 617      * or if this can be done by the sink for us */
 618
 619     if (do_volume_adj_here)
 620         /* We had different channel maps, so we already did the adjustment */
 621         pa_cvolume_reset(volume, i->sink->sample_spec.channels);
 622     else if (i->thread_info.muted)
 623         /* We've both the same channel map, so let's have the sink do the adjustment for us*/
 624         pa_cvolume_mute(volume, i->sink->sample_spec.channels);
 625     else
 626         *volume = i->thread_info.volume;
 627
 628     return 0;
 629 }
 630
 631 /* Called from thread context */
 632 void pa_sink_input_drop(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 633     pa_sink_input_assert_ref(i);
 634
 635     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 636     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 637     pa_assert(nbytes > 0);
 638
 639 /*     pa_log_debug("dropping %lu", (unsigned long) nbytes); */
 640
 641     pa_memblockq_drop(i->thread_info.render_memblockq, nbytes);
 642 }
 643
 644 /* Called from thread context */
 645 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 646     size_t lbq;
 647     pa_bool_t called = FALSE;
 648     pa_sink_input_assert_ref(i);
 649
 650     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 651     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 652
 653 /*     pa_log_debug("rewind(%lu, %lu)", (unsigned long) nbytes, (unsigned long) i->thread_info.rewrite_nbytes); */
 654
 655     lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
 656
 657     if (nbytes > 0) {
 658         pa_log_debug("Have to rewind %lu bytes on render memblockq.", (unsigned long) nbytes);
 659         pa_memblockq_rewind(i->thread_info.render_memblockq, nbytes);
 660     }
 661
 662     if (i->thread_info.rewrite_nbytes == (size_t) -1) {
 663
 664         /* We were asked to drop all buffered data, and rerequest new
 665          * data from implementor the next time push() is called */
 666
 667         pa_memblockq_flush_write(i->thread_info.render_memblockq);
 668
 669     } else if (i->thread_info.rewrite_nbytes > 0) {
 670         size_t max_rewrite, amount;
 671
 672         /* Calculate how much make sense to rewrite at most */
 673         max_rewrite = nbytes + lbq;
 674
 675         /* Transform into local domain */
 676         if (i->thread_info.resampler)
 677             max_rewrite = pa_resampler_request(i->thread_info.resampler, max_rewrite);
 678
 679         /* Calculate how much of the rewinded data should actually be rewritten */
 680         amount = PA_MIN(i->thread_info.rewrite_nbytes, max_rewrite);
 681
 682         if (amount > 0) {
 683             pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) amount);
 684
 685             /* Tell the implementor */
 686             if (i->process_rewind)
 687                 i->process_rewind(i, amount);
 688             called = TRUE;
 689
 690             /* Convert back to to sink domain */
 691             if (i->thread_info.resampler)
 692                 amount = pa_resampler_result(i->thread_info.resampler, amount);
 693
 694             if (amount > 0)
 695                 /* Ok, now update the write pointer */
 696                 pa_memblockq_seek(i->thread_info.render_memblockq, - ((int64_t) amount), PA_SEEK_RELATIVE);
 697
 698             if (i->thread_info.rewrite_flush)
 699                 pa_memblockq_silence(i->thread_info.render_memblockq);
 700
 701             /* And reset the resampler */
 702             if (i->thread_info.resampler)
 703                 pa_resampler_reset(i->thread_info.resampler);
 704         }
 705     }
 706
 707     if (!called)
 708         if (i->process_rewind)
 709             i->process_rewind(i, 0);
 710
 711     i->thread_info.rewrite_nbytes = 0;
 712     i->thread_info.rewrite_flush = FALSE;
 713 }
 714
 715 /* Called from thread context */
 716 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 717     pa_sink_input_assert_ref(i);
 718     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 719     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 720
 721     pa_memblockq_set_maxrewind(i->thread_info.render_memblockq, nbytes);
 722
 723     if (i->update_max_rewind)
 724         i->update_max_rewind(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 725 }
 726
 727 /* Called from thread context */
 728 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 729     pa_sink_input_assert_ref(i);
 730     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 731     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 732
 733     if (i->update_max_request)
 734         i->update_max_request(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 735 }
 736
 737 /* Called from thread context */
 738 static pa_usec_t fixup_latency(pa_sink *s, pa_usec_t usec) {
 739     pa_sink_assert_ref(s);
 740
 741     if (usec == (pa_usec_t) -1)
 742         return usec;
 743
 744     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 745         usec = s->thread_info.max_latency;
 746
 747     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 748         usec = s->thread_info.min_latency;
 749
 750     return usec;
 751 }
 752
 753 /* Called from thread context */
 754 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec) {
 755     pa_sink_input_assert_ref(i);
 756
 757     usec = fixup_latency(i->sink, usec);
 758     i->thread_info.requested_sink_latency = usec;
 759     pa_sink_invalidate_requested_latency(i->sink);
 760
 761     return usec;
 762 }
 763
 764 /* Called from main context */
 765 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec) {
 766     pa_sink_input_assert_ref(i);
 767
 768     if (PA_SINK_INPUT_IS_LINKED(i->state))
 769         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 770     else
 771         /* If this sink input is not realized yet, we have to touch
 772          * the thread info data directly */
 773
 774         i->thread_info.requested_sink_latency = usec;
 775
 776     return usec;
 777 }
 778
 779 /* Called from main context */
 780 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i) {
 781     pa_usec_t usec = 0;
 782
 783     pa_sink_input_assert_ref(i);
 784
 785     if (PA_SINK_INPUT_IS_LINKED(i->state))
 786         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 787     else
 788         /* If this sink input is not realized yet, we have to touch
 789          * the thread info data directly */
 790         usec = i->thread_info.requested_sink_latency;
 791
 792     return usec;
 793 }
 794
 795 /* Called from main context */
 796 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume) {
 797     pa_sink_input_set_volume_data data;
 798
 799     pa_sink_input_assert_ref(i);
 800     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 801     pa_assert(volume);
 802     pa_assert(pa_cvolume_valid(volume));
 803     pa_assert(pa_cvolume_compatible(volume, &i->sample_spec));
 804
 805     data.sink_input = i;
 806     data.virtual_volume = *volume;
 807     data.volume = *volume;
 808
 809     /* If you change something here, consider looking into
 810      * module-flat-volume.c as well since it uses very similar
 811      * code. */
 812
 813     if (pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_SET_VOLUME], &data) < 0)
 814         return;
 815
 816     if (!pa_cvolume_equal(&i->volume, &data.volume)) {
 817         i->volume = data.volume;
 818         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_VOLUME, &data.volume, 0, NULL) == 0);
 819     }
 820
 821     if (!pa_cvolume_equal(&i->virtual_volume, &data.virtual_volume)) {
 822         i->virtual_volume = data.virtual_volume;
 823         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 824     }
 825 }
 826
 827 /* Called from main context */
 828 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
 829     pa_sink_input_assert_ref(i);
 830     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 831
 832     return &i->virtual_volume;
 833 }
 834
 835 /* Called from main context */
 836 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute) {
 837     pa_assert(i);
 838     pa_sink_input_assert_ref(i);
 839     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 840
 841     if (!i->muted == !mute)
 842         return;
 843
 844     i->muted = mute;
 845
 846     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 847     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 848 }
 849
 850 /* Called from main context */
 851 pa_bool_t pa_sink_input_get_mute(pa_sink_input *i) {
 852     pa_sink_input_assert_ref(i);
 853     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 854
 855     return i->muted;
 856 }
 857
 858 /* Called from main context */
 859 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b) {
 860     pa_sink_input_assert_ref(i);
 861     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 862
 863     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 864 }
 865
 866 /* Called from main context */
 867 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
 868     pa_sink_input_assert_ref(i);
 869     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 870     pa_return_val_if_fail(i->thread_info.resampler, -1);
 871
 872     if (i->sample_spec.rate == rate)
 873         return 0;
 874
 875     i->sample_spec.rate = rate;
 876
 877     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 878
 879     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 880     return 0;
 881 }
 882
 883 /* Called from main context */
 884 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
 885     const char *old;
 886     pa_sink_input_assert_ref(i);
 887
 888     if (!name && !pa_proplist_contains(i->proplist, PA_PROP_MEDIA_NAME))
 889         return;
 890
 891     old = pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME);
 892
 893     if (old && name && !strcmp(old, name))
 894         return;
 895
 896     if (name)
 897         pa_proplist_sets(i->proplist, PA_PROP_MEDIA_NAME, name);
 898     else
 899         pa_proplist_unset(i->proplist, PA_PROP_MEDIA_NAME);
 900
 901     if (PA_SINK_INPUT_IS_LINKED(i->state)) {
 902         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], i);
 903         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 904     }
 905 }
 906
 907 /* Called from main context */
 908 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
 909     pa_sink_input_assert_ref(i);
 910
 911     return i->resample_method;
 912 }
 913
 914 /* Called from main context */
 915 pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest) {
 916     pa_sink_input_assert_ref(i);
 917     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 918     pa_sink_assert_ref(dest);
 919
 920     if (dest == i->sink)
 921         return TRUE;
 922
 923     if (i->flags & PA_SINK_INPUT_DONT_MOVE)
 924         return FALSE;
 925
 926     if (i->sync_next || i->sync_prev) {
 927         pa_log_warn("Moving synchronised streams not supported.");
 928         return FALSE;
 929     }
 930
 931     if (pa_idxset_size(dest->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 932         pa_log_warn("Failed to move sink input: too many inputs per sink.");
 933         return FALSE;
 934     }
 935
 936     if (i->may_move_to)
 937         if (!i->may_move_to(i, dest))
 938             return FALSE;
 939
 940     return TRUE;
 941 }
 942
 943 /* Called from main context */
 944 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest) {
 945     pa_resampler *new_resampler;
 946     pa_sink *origin;
 947     pa_sink_input_move_hook_data hook_data;
 948     pa_source_output *o, *p = NULL;
 949
 950     pa_sink_input_assert_ref(i);
 951     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 952     pa_sink_assert_ref(dest);
 953
 954     origin = i->sink;
 955
 956     if (dest == origin)
 957         return 0;
 958
 959     if (!pa_sink_input_may_move_to(i, dest))
 960         return -1;
 961
 962     /* Kill directly connected outputs */
 963     while ((o = pa_idxset_first(i->direct_outputs, NULL))) {
 964         pa_assert(o != p);
 965         pa_source_output_kill(o);
 966         p = o;
 967     }
 968
 969     if (i->thread_info.resampler &&
 970         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 971         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 972
 973         /* Try to reuse the old resampler if possible */
 974         new_resampler = i->thread_info.resampler;
 975
 976     else if ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 977              !pa_sample_spec_equal(&i->sample_spec, &dest->sample_spec) ||
 978              !pa_channel_map_equal(&i->channel_map, &dest->channel_map)) {
 979
 980         /* Okey, we need a new resampler for the new sink */
 981
 982         if (!(new_resampler = pa_resampler_new(
 983                       dest->core->mempool,
 984                       &i->sample_spec, &i->channel_map,
 985                       &dest->sample_spec, &dest->channel_map,
 986                       i->resample_method,
 987                       ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 988                       ((i->flags & PA_SINK_INPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 989                       (i->core->disable_remixing || (i->flags & PA_SINK_INPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 990             pa_log_warn("Unsupported resampling operation.");
 991             return -1;
 992         }
 993     } else
 994         new_resampler = NULL;
 995
 996     hook_data.sink_input = i;
 997     hook_data.destination = dest;
 998     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE], &hook_data);
 999
1000     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_START_MOVE, i, 0, NULL) == 0);
1001
1002     pa_idxset_remove_by_data(origin->inputs, i, NULL);
1003     pa_idxset_put(dest->inputs, i, NULL);
1004     i->sink = dest;
1005
1006     if (pa_sink_input_get_state(i) == PA_SINK_INPUT_CORKED) {
1007         pa_assert_se(origin->n_corked-- >= 1);
1008         dest->n_corked++;
1009     }
1010
1011     /* Replace resampler and render queue */
1012     if (new_resampler != i->thread_info.resampler) {
1013
1014         if (i->thread_info.resampler)
1015             pa_resampler_free(i->thread_info.resampler);
1016         i->thread_info.resampler = new_resampler;
1017
1018         pa_memblockq_free(i->thread_info.render_memblockq);
1019
1020         i->thread_info.render_memblockq = pa_memblockq_new(
1021                 0,
1022                 MEMBLOCKQ_MAXLENGTH,
1023                 0,
1024                 pa_frame_size(&i->sink->sample_spec),
1025                 0,
1026                 1,
1027                 0,
1028                 &i->sink->silence);
1029     }
1030
1031     pa_sink_update_status(origin);
1032     pa_sink_update_status(dest);
1033
1034     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_FINISH_MOVE, i, 0, NULL) == 0);
1035
1036     if (i->moved)
1037         i->moved(i);
1038
1039     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_POST], i);
1040
1041     pa_log_debug("Successfully moved sink input %i from %s to %s.", i->index, origin->name, dest->name);
1042
1043     /* Notify everyone */
1044     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
1045
1046     return 0;
1047 }
1048
1049 /* Called from IO thread context */
1050 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state) {
1051     pa_bool_t corking, uncorking;
1052     pa_sink_input_assert_ref(i);
1053
1054     if (state == i->thread_info.state)
1055         return;
1056
1057     if ((state == PA_SINK_INPUT_DRAINED || state == PA_SINK_INPUT_RUNNING) &&
1058         !(i->thread_info.state == PA_SINK_INPUT_DRAINED || i->thread_info.state != PA_SINK_INPUT_RUNNING))
1059         pa_atomic_store(&i->thread_info.drained, 1);
1060
1061     corking = state == PA_SINK_INPUT_CORKED && i->thread_info.state == PA_SINK_INPUT_RUNNING;
1062     uncorking = i->thread_info.state == PA_SINK_INPUT_CORKED && state == PA_SINK_INPUT_RUNNING;
1063
1064     if (i->state_change)
1065         i->state_change(i, state);
1066
1067     i->thread_info.state = state;
1068
1069     if (corking) {
1070
1071         pa_log_debug("Requesting rewind due to corking");
1072
1073         /* This will tell the implementing sink input driver to rewind
1074          * so that the unplayed already mixed data is not lost */
1075         pa_sink_input_request_rewind(i, 0, TRUE, TRUE);
1076
1077     } else if (uncorking) {
1078
1079         i->thread_info.underrun_for = (uint64_t) -1;
1080         i->thread_info.playing_for = 0;
1081
1082         pa_log_debug("Requesting rewind due to uncorking");
1083
1084         /* OK, we're being uncorked. Make sure we're not rewound when
1085          * the hw buffer is remixed and request a remix. */
1086         pa_sink_input_request_rewind(i, 0, FALSE, TRUE);
1087     }
1088 }
1089
1090 /* Called from thread context, except when it is not. */
1091 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
1092     pa_sink_input *i = PA_SINK_INPUT(o);
1093     pa_sink_input_assert_ref(i);
1094
1095     switch (code) {
1096
1097         case PA_SINK_INPUT_MESSAGE_SET_VOLUME:
1098             i->thread_info.volume = *((pa_cvolume*) userdata);
1099             pa_sink_input_request_rewind(i, 0, TRUE, FALSE);
1100             return 0;
1101
1102         case PA_SINK_INPUT_MESSAGE_SET_MUTE:
1103             i->thread_info.muted = PA_PTR_TO_UINT(userdata);
1104             pa_sink_input_request_rewind(i, 0, TRUE, FALSE);
1105             return 0;
1106
1107         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
1108             pa_usec_t *r = userdata;
1109             pa_usec_t sink_usec = 0;
1110
1111             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(i->thread_info.render_memblockq), &i->sink->sample_spec);
1112
1113             if (i->sink->parent.process_msg(PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_GET_LATENCY, &sink_usec, 0, NULL) >= 0)
1114                 r[1] += sink_usec;
1115
1116             return 0;
1117         }
1118
1119         case PA_SINK_INPUT_MESSAGE_SET_RATE:
1120
1121             i->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
1122             pa_resampler_set_input_rate(i->thread_info.resampler, PA_PTR_TO_UINT(userdata));
1123
1124             return 0;
1125
1126         case PA_SINK_INPUT_MESSAGE_SET_STATE: {
1127             pa_sink_input *ssync;
1128
1129             pa_sink_input_set_state_within_thread(i, PA_PTR_TO_UINT(userdata));
1130
1131             for (ssync = i->thread_info.sync_prev; ssync; ssync = ssync->thread_info.sync_prev)
1132                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1133
1134             for (ssync = i->thread_info.sync_next; ssync; ssync = ssync->thread_info.sync_next)
1135                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1136
1137             return 0;
1138         }
1139
1140         case PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY: {
1141             pa_usec_t *usec = userdata;
1142
1143             *usec = pa_sink_input_set_requested_latency_within_thread(i, *usec);
1144             return 0;
1145         }
1146
1147         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
1148             pa_usec_t *r = userdata;
1149
1150             *r = i->thread_info.requested_sink_latency;
1151             return 0;
1152         }
1153     }
1154
1155     return -1;
1156 }
1157
1158 /* Called from main thread */
1159 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
1160     pa_sink_input_assert_ref(i);
1161
1162     if (i->state == PA_SINK_INPUT_RUNNING || i->state == PA_SINK_INPUT_DRAINED)
1163         return pa_atomic_load(&i->thread_info.drained) ? PA_SINK_INPUT_DRAINED : PA_SINK_INPUT_RUNNING;
1164
1165     return i->state;
1166 }
1167
1168 /* Called from IO context */
1169 pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i) {
1170     pa_sink_input_assert_ref(i);
1171
1172     if (PA_SINK_INPUT_IS_LINKED(i->thread_info.state))
1173         return pa_memblockq_is_empty(i->thread_info.render_memblockq);
1174
1175     return TRUE;
1176 }
1177
1178 /* Called from IO context */
1179 void pa_sink_input_request_rewind(pa_sink_input *i, size_t nbytes  /* in our sample spec */, pa_bool_t rewrite, pa_bool_t flush) {
1180     size_t lbq;
1181
1182     /* If 'rewrite' is TRUE the sink is rewound as far as requested
1183      * and possible and the exact value of this is passed back the
1184      * implementor via process_rewind(). If 'flush' is also TRUE all
1185      * already rendered data is also dropped.
1186      *
1187      * If 'rewrite' is FALSE the sink is rewound as far as requested
1188      * and possible and the already rendered data is dropped so that
1189      * in the next iteration we read new data from the
1190      * implementor. This implies 'flush' is TRUE. */
1191
1192     pa_sink_input_assert_ref(i);
1193     pa_assert(i->thread_info.rewrite_nbytes == 0);
1194
1195 /*     pa_log_debug("request rewrite %lu", (unsigned long) nbytes); */
1196
1197     /* We don't take rewind requests while we are corked */
1198     if (i->thread_info.state == PA_SINK_INPUT_CORKED)
1199         return;
1200
1201     pa_assert(rewrite || flush);
1202
1203     /* Calculate how much we can rewind locally without having to
1204      * touch the sink */
1205     if (rewrite)
1206         lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
1207     else
1208         lbq = 0;
1209
1210     /* Check if rewinding for the maximum is requested, and if so, fix up */
1211     if (nbytes <= 0) {
1212
1213         /* Calculate maximum number of bytes that could be rewound in theory */
1214         nbytes = i->sink->thread_info.max_rewind + lbq;
1215
1216         /* Transform from sink domain */
1217         if (i->thread_info.resampler)
1218             nbytes = pa_resampler_request(i->thread_info.resampler, nbytes);
1219     }
1220
1221     if (rewrite) {
1222         /* Make sure to not overwrite over underruns */
1223         if (nbytes > i->thread_info.playing_for)
1224             nbytes = (size_t) i->thread_info.playing_for;
1225
1226         i->thread_info.rewrite_nbytes = nbytes;
1227     } else
1228         i->thread_info.rewrite_nbytes = (size_t) -1;
1229
1230     i->thread_info.rewrite_flush = flush && i->thread_info.rewrite_nbytes != 0;
1231
1232     /* Transform to sink domain */
1233     if (i->thread_info.resampler)
1234         nbytes = pa_resampler_result(i->thread_info.resampler, nbytes);
1235
1236     if (nbytes > lbq)
1237         pa_sink_request_rewind(i->sink, nbytes - lbq);
1238     else
1239         /* This call will make sure process_rewind() is called later */
1240         pa_sink_request_rewind(i->sink, 0);
1241 }
1242
1243 /* Called from main context */
1244 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret) {
1245     pa_sink_input_assert_ref(i);
1246     pa_assert(ret);
1247
1248     pa_silence_memchunk_get(
1249                 &i->sink->core->silence_cache,
1250                 i->sink->core->mempool,
1251                 ret,
1252                 &i->sample_spec,
1253                 i->thread_info.resampler ? pa_resampler_max_block_size(i->thread_info.resampler) : 0);
1254
1255     return ret;
1256 }