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
 307 /* Called from main context */
 308 static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
 309     pa_sink_input *ssync;
 310     pa_assert(i);
 311
 312     if (state == PA_SINK_INPUT_DRAINED)
 313         state = PA_SINK_INPUT_RUNNING;
 314
 315     if (i->state == state)
 316         return 0;
 317
 318     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);
 319
 320     update_n_corked(i, state);
 321     i->state = state;
 322
 323     for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev) {
 324         update_n_corked(ssync, state);
 325         ssync->state = state;
 326     }
 327     for (ssync = i->sync_next; ssync; ssync = ssync->sync_next) {
 328         update_n_corked(ssync, state);
 329         ssync->state = state;
 330     }
 331
 332     if (state != PA_SINK_INPUT_UNLINKED) {
 333         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], i);
 334
 335         for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev)
 336             pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 337
 338         for (ssync = i->sync_next; ssync; ssync = ssync->sync_next)
 339             pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 340     }
 341
 342     pa_sink_update_status(i->sink);
 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     pa_sink_update_status(i->sink);
 395
 396     i->sink = NULL;
 397     pa_sink_input_unref(i);
 398 }
 399
 400 /* Called from main context */
 401 static void sink_input_free(pa_object *o) {
 402     pa_sink_input* i = PA_SINK_INPUT(o);
 403
 404     pa_assert(i);
 405     pa_assert(pa_sink_input_refcnt(i) == 0);
 406
 407     if (PA_SINK_INPUT_IS_LINKED(i->state))
 408         pa_sink_input_unlink(i);
 409
 410     pa_log_info("Freeing input %u \"%s\"", i->index, pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME)));
 411
 412     pa_assert(!i->thread_info.attached);
 413
 414     if (i->thread_info.render_memblockq)
 415         pa_memblockq_free(i->thread_info.render_memblockq);
 416
 417     if (i->thread_info.resampler)
 418         pa_resampler_free(i->thread_info.resampler);
 419
 420     if (i->proplist)
 421         pa_proplist_free(i->proplist);
 422
 423     if (i->direct_outputs)
 424         pa_idxset_free(i->direct_outputs, NULL, NULL);
 425
 426     if (i->thread_info.direct_outputs)
 427         pa_hashmap_free(i->thread_info.direct_outputs, NULL, NULL);
 428
 429     pa_xfree(i->driver);
 430     pa_xfree(i);
 431 }
 432
 433 /* Called from main context */
 434 void pa_sink_input_put(pa_sink_input *i) {
 435     pa_sink_input_state_t state;
 436     pa_sink_input_assert_ref(i);
 437
 438     pa_assert(i->state == PA_SINK_INPUT_INIT);
 439
 440     /* The following fields must be initialized properly */
 441     pa_assert(i->pop);
 442     pa_assert(i->process_rewind);
 443     pa_assert(i->kill);
 444
 445     i->thread_info.volume = i->volume;
 446     i->thread_info.muted = i->muted;
 447
 448     state = i->flags & PA_SINK_INPUT_START_CORKED ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 449
 450     update_n_corked(i, state);
 451     i->state = state;
 452
 453     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL) == 0);
 454
 455     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
 456     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
 457
 458     pa_sink_update_status(i->sink);
 459 }
 460
 461 /* Called from main context */
 462 void pa_sink_input_kill(pa_sink_input*i) {
 463     pa_sink_input_assert_ref(i);
 464     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 465
 466     i->kill(i);
 467 }
 468
 469 /* Called from main context */
 470 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency) {
 471     pa_usec_t r[2] = { 0, 0 };
 472
 473     pa_sink_input_assert_ref(i);
 474     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 475
 476     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 477
 478     if (i->get_latency)
 479         r[0] += i->get_latency(i);
 480
 481     if (sink_latency)
 482         *sink_latency = r[1];
 483
 484     return r[0];
 485 }
 486
 487 /* Called from thread context */
 488 int pa_sink_input_peek(pa_sink_input *i, size_t slength /* in sink frames */, pa_memchunk *chunk, pa_cvolume *volume) {
 489     pa_bool_t do_volume_adj_here;
 490     pa_bool_t volume_is_norm;
 491     size_t block_size_max_sink, block_size_max_sink_input;
 492     size_t ilength;
 493
 494     pa_sink_input_assert_ref(i);
 495     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 496     pa_assert(pa_frame_aligned(slength, &i->sink->sample_spec));
 497     pa_assert(chunk);
 498     pa_assert(volume);
 499
 500 /*     pa_log_debug("peek"); */
 501
 502     if (!i->pop)
 503         return -1;
 504
 505     pa_assert(i->thread_info.state == PA_SINK_INPUT_RUNNING ||
 506               i->thread_info.state == PA_SINK_INPUT_CORKED ||
 507               i->thread_info.state == PA_SINK_INPUT_DRAINED);
 508
 509     block_size_max_sink_input = i->thread_info.resampler ?
 510         pa_resampler_max_block_size(i->thread_info.resampler) :
 511         pa_frame_align(pa_mempool_block_size_max(i->sink->core->mempool), &i->sample_spec);
 512
 513     block_size_max_sink = pa_frame_align(pa_mempool_block_size_max(i->sink->core->mempool), &i->sink->sample_spec);
 514
 515     /* Default buffer size */
 516     if (slength <= 0)
 517         slength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sink->sample_spec);
 518
 519     if (slength > block_size_max_sink)
 520         slength = block_size_max_sink;
 521
 522     if (i->thread_info.resampler) {
 523         ilength = pa_resampler_request(i->thread_info.resampler, slength);
 524
 525         if (ilength <= 0)
 526             ilength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sample_spec);
 527     } else
 528         ilength = slength;
 529
 530     if (ilength > block_size_max_sink_input)
 531         ilength = block_size_max_sink_input;
 532
 533     /* If the channel maps of the sink and this stream differ, we need
 534      * to adjust the volume *before* we resample. Otherwise we can do
 535      * it after and leave it for the sink code */
 536
 537     do_volume_adj_here = !pa_channel_map_equal(&i->channel_map, &i->sink->channel_map);
 538     volume_is_norm = pa_cvolume_is_norm(&i->thread_info.volume) && !i->thread_info.muted;
 539
 540     while (!pa_memblockq_is_readable(i->thread_info.render_memblockq)) {
 541         pa_memchunk tchunk;
 542
 543         /* There's nothing in our render queue. We need to fill it up
 544          * with data from the implementor. */
 545
 546         if (i->thread_info.state == PA_SINK_INPUT_CORKED ||
 547             i->pop(i, ilength, &tchunk) < 0) {
 548
 549             /* OK, we're corked or the implementor didn't give us any
 550              * data, so let's just hand out silence */
 551             pa_atomic_store(&i->thread_info.drained, 1);
 552
 553             pa_memblockq_seek(i->thread_info.render_memblockq, (int64_t) slength, PA_SEEK_RELATIVE);
 554             i->thread_info.playing_for = 0;
 555             if (i->thread_info.underrun_for != (uint64_t) -1)
 556                 i->thread_info.underrun_for += ilength;
 557             break;
 558         }
 559
 560         pa_atomic_store(&i->thread_info.drained, 0);
 561
 562         pa_assert(tchunk.length > 0);
 563         pa_assert(tchunk.memblock);
 564
 565         i->thread_info.underrun_for = 0;
 566         i->thread_info.playing_for += tchunk.length;
 567
 568         while (tchunk.length > 0) {
 569             pa_memchunk wchunk;
 570
 571             wchunk = tchunk;
 572             pa_memblock_ref(wchunk.memblock);
 573
 574             if (wchunk.length > block_size_max_sink_input)
 575                 wchunk.length = block_size_max_sink_input;
 576
 577             /* It might be necessary to adjust the volume here */
 578             if (do_volume_adj_here && !volume_is_norm) {
 579                 pa_memchunk_make_writable(&wchunk, 0);
 580
 581                 if (i->thread_info.muted)
 582                     pa_silence_memchunk(&wchunk, &i->thread_info.sample_spec);
 583                 else
 584                     pa_volume_memchunk(&wchunk, &i->thread_info.sample_spec, &i->thread_info.volume);
 585             }
 586
 587             if (!i->thread_info.resampler)
 588                 pa_memblockq_push_align(i->thread_info.render_memblockq, &wchunk);
 589             else {
 590                 pa_memchunk rchunk;
 591                 pa_resampler_run(i->thread_info.resampler, &wchunk, &rchunk);
 592
 593 /*                 pa_log_debug("pushing %lu", (unsigned long) rchunk.length); */
 594
 595                 if (rchunk.memblock) {
 596                     pa_memblockq_push_align(i->thread_info.render_memblockq, &rchunk);
 597                     pa_memblock_unref(rchunk.memblock);
 598                 }
 599             }
 600
 601             pa_memblock_unref(wchunk.memblock);
 602
 603             tchunk.index += wchunk.length;
 604             tchunk.length -= wchunk.length;
 605         }
 606
 607         pa_memblock_unref(tchunk.memblock);
 608     }
 609
 610     pa_assert_se(pa_memblockq_peek(i->thread_info.render_memblockq, chunk) >= 0);
 611
 612     pa_assert(chunk->length > 0);
 613     pa_assert(chunk->memblock);
 614
 615 /*     pa_log_debug("peeking %lu", (unsigned long) chunk->length); */
 616
 617     if (chunk->length > block_size_max_sink)
 618         chunk->length = block_size_max_sink;
 619
 620     /* Let's see if we had to apply the volume adjustment ourselves,
 621      * or if this can be done by the sink for us */
 622
 623     if (do_volume_adj_here)
 624         /* We had different channel maps, so we already did the adjustment */
 625         pa_cvolume_reset(volume, i->sink->sample_spec.channels);
 626     else if (i->thread_info.muted)
 627         /* We've both the same channel map, so let's have the sink do the adjustment for us*/
 628         pa_cvolume_mute(volume, i->sink->sample_spec.channels);
 629     else
 630         *volume = i->thread_info.volume;
 631
 632     return 0;
 633 }
 634
 635 /* Called from thread context */
 636 void pa_sink_input_drop(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 637     pa_sink_input_assert_ref(i);
 638
 639     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 640     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 641     pa_assert(nbytes > 0);
 642
 643 /*     pa_log_debug("dropping %lu", (unsigned long) nbytes); */
 644
 645     pa_memblockq_drop(i->thread_info.render_memblockq, nbytes);
 646 }
 647
 648 /* Called from thread context */
 649 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 650     size_t lbq;
 651     pa_bool_t called = FALSE;
 652     pa_sink_input_assert_ref(i);
 653
 654     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 655     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 656
 657 /*     pa_log_debug("rewind(%lu, %lu)", (unsigned long) nbytes, (unsigned long) i->thread_info.rewrite_nbytes); */
 658
 659     lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
 660
 661     if (nbytes > 0) {
 662         pa_log_debug("Have to rewind %lu bytes on render memblockq.", (unsigned long) nbytes);
 663         pa_memblockq_rewind(i->thread_info.render_memblockq, nbytes);
 664     }
 665
 666     if (i->thread_info.rewrite_nbytes == (size_t) -1) {
 667
 668         /* We were asked to drop all buffered data, and rerequest new
 669          * data from implementor the next time push() is called */
 670
 671         pa_memblockq_flush_write(i->thread_info.render_memblockq);
 672
 673     } else if (i->thread_info.rewrite_nbytes > 0) {
 674         size_t max_rewrite, amount;
 675
 676         /* Calculate how much make sense to rewrite at most */
 677         max_rewrite = nbytes + lbq;
 678
 679         /* Transform into local domain */
 680         if (i->thread_info.resampler)
 681             max_rewrite = pa_resampler_request(i->thread_info.resampler, max_rewrite);
 682
 683         /* Calculate how much of the rewinded data should actually be rewritten */
 684         amount = PA_MIN(i->thread_info.rewrite_nbytes, max_rewrite);
 685
 686         if (amount > 0) {
 687             pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) amount);
 688
 689             /* Tell the implementor */
 690             if (i->process_rewind)
 691                 i->process_rewind(i, amount);
 692             called = TRUE;
 693
 694             /* Convert back to to sink domain */
 695             if (i->thread_info.resampler)
 696                 amount = pa_resampler_result(i->thread_info.resampler, amount);
 697
 698             if (amount > 0)
 699                 /* Ok, now update the write pointer */
 700                 pa_memblockq_seek(i->thread_info.render_memblockq, - ((int64_t) amount), PA_SEEK_RELATIVE);
 701
 702             if (i->thread_info.rewrite_flush)
 703                 pa_memblockq_silence(i->thread_info.render_memblockq);
 704
 705             /* And reset the resampler */
 706             if (i->thread_info.resampler)
 707                 pa_resampler_reset(i->thread_info.resampler);
 708         }
 709     }
 710
 711     if (!called)
 712         if (i->process_rewind)
 713             i->process_rewind(i, 0);
 714
 715     i->thread_info.rewrite_nbytes = 0;
 716     i->thread_info.rewrite_flush = FALSE;
 717 }
 718
 719 /* Called from thread context */
 720 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 721     pa_sink_input_assert_ref(i);
 722     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 723     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 724
 725     pa_memblockq_set_maxrewind(i->thread_info.render_memblockq, nbytes);
 726
 727     if (i->update_max_rewind)
 728         i->update_max_rewind(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 729 }
 730
 731 /* Called from thread context */
 732 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 733     pa_sink_input_assert_ref(i);
 734     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 735     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 736
 737     if (i->update_max_request)
 738         i->update_max_request(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 739 }
 740
 741 /* Called from thread context */
 742 static pa_usec_t fixup_latency(pa_sink *s, pa_usec_t usec) {
 743     pa_sink_assert_ref(s);
 744
 745     if (usec == (pa_usec_t) -1)
 746         return usec;
 747
 748     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 749         usec = s->thread_info.max_latency;
 750
 751     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 752         usec = s->thread_info.min_latency;
 753
 754     return usec;
 755 }
 756
 757 /* Called from thread context */
 758 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec) {
 759     pa_sink_input_assert_ref(i);
 760
 761     usec = fixup_latency(i->sink, usec);
 762     i->thread_info.requested_sink_latency = usec;
 763     pa_sink_invalidate_requested_latency(i->sink);
 764
 765     return usec;
 766 }
 767
 768 /* Called from main context */
 769 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec) {
 770     pa_sink_input_assert_ref(i);
 771
 772     if (PA_SINK_INPUT_IS_LINKED(i->state))
 773         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 774     else
 775         /* If this sink input is not realized yet, we have to touch
 776          * the thread info data directly */
 777
 778         i->thread_info.requested_sink_latency = usec;
 779
 780     return usec;
 781 }
 782
 783 /* Called from main context */
 784 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i) {
 785     pa_usec_t usec = 0;
 786
 787     pa_sink_input_assert_ref(i);
 788
 789     if (PA_SINK_INPUT_IS_LINKED(i->state))
 790         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 791     else
 792         /* If this sink input is not realized yet, we have to touch
 793          * the thread info data directly */
 794         usec = i->thread_info.requested_sink_latency;
 795
 796     return usec;
 797 }
 798
 799 /* Called from main context */
 800 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume) {
 801     pa_sink_input_set_volume_data data;
 802
 803     pa_sink_input_assert_ref(i);
 804     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 805     pa_assert(volume);
 806     pa_assert(pa_cvolume_valid(volume));
 807     pa_assert(pa_cvolume_compatible(volume, &i->sample_spec));
 808
 809     data.sink_input = i;
 810     data.virtual_volume = *volume;
 811     data.volume = *volume;
 812
 813     /* If you change something here, consider looking into
 814      * module-flat-volume.c as well since it uses very similar
 815      * code. */
 816
 817     if (pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_SET_VOLUME], &data) < 0)
 818         return;
 819
 820     if (!pa_cvolume_equal(&i->volume, &data.volume)) {
 821         i->volume = data.volume;
 822         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_VOLUME, &data.volume, 0, NULL) == 0);
 823     }
 824
 825     if (!pa_cvolume_equal(&i->virtual_volume, &data.virtual_volume)) {
 826         i->virtual_volume = data.virtual_volume;
 827         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 828     }
 829 }
 830
 831 /* Called from main context */
 832 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
 833     pa_sink_input_assert_ref(i);
 834     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 835
 836     return &i->virtual_volume;
 837 }
 838
 839 /* Called from main context */
 840 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute) {
 841     pa_assert(i);
 842     pa_sink_input_assert_ref(i);
 843     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 844
 845     if (!i->muted == !mute)
 846         return;
 847
 848     i->muted = mute;
 849
 850     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 851     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 852 }
 853
 854 /* Called from main context */
 855 pa_bool_t pa_sink_input_get_mute(pa_sink_input *i) {
 856     pa_sink_input_assert_ref(i);
 857     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 858
 859     return i->muted;
 860 }
 861
 862 /* Called from main thread */
 863 pa_bool_t pa_sink_input_update_proplist(pa_sink_input *i, pa_update_mode_t mode, pa_proplist *p) {
 864
 865   pa_sink_input_assert_ref(i);
 866
 867   pa_proplist_update(i->proplist, mode, p);
 868
 869   if (PA_SINK_IS_LINKED(i->state)) {
 870       pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], i);
 871       pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 872   }
 873
 874   return TRUE;
 875 }
 876
 877 /* Called from main context */
 878 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b) {
 879     pa_sink_input_assert_ref(i);
 880     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 881
 882     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 883 }
 884
 885 /* Called from main context */
 886 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
 887     pa_sink_input_assert_ref(i);
 888     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 889     pa_return_val_if_fail(i->thread_info.resampler, -1);
 890
 891     if (i->sample_spec.rate == rate)
 892         return 0;
 893
 894     i->sample_spec.rate = rate;
 895
 896     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 897
 898     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 899     return 0;
 900 }
 901
 902 /* Called from main context */
 903 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
 904     const char *old;
 905     pa_sink_input_assert_ref(i);
 906
 907     if (!name && !pa_proplist_contains(i->proplist, PA_PROP_MEDIA_NAME))
 908         return;
 909
 910     old = pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME);
 911
 912     if (old && name && !strcmp(old, name))
 913         return;
 914
 915     if (name)
 916         pa_proplist_sets(i->proplist, PA_PROP_MEDIA_NAME, name);
 917     else
 918         pa_proplist_unset(i->proplist, PA_PROP_MEDIA_NAME);
 919
 920     if (PA_SINK_INPUT_IS_LINKED(i->state)) {
 921         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], i);
 922         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 923     }
 924 }
 925
 926 /* Called from main context */
 927 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
 928     pa_sink_input_assert_ref(i);
 929
 930     return i->resample_method;
 931 }
 932
 933 /* Called from main context */
 934 pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest) {
 935     pa_sink_input_assert_ref(i);
 936     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 937     pa_sink_assert_ref(dest);
 938
 939     if (dest == i->sink)
 940         return TRUE;
 941
 942     if (i->flags & PA_SINK_INPUT_DONT_MOVE)
 943         return FALSE;
 944
 945     if (i->sync_next || i->sync_prev) {
 946         pa_log_warn("Moving synchronised streams not supported.");
 947         return FALSE;
 948     }
 949
 950     if (pa_idxset_size(dest->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 951         pa_log_warn("Failed to move sink input: too many inputs per sink.");
 952         return FALSE;
 953     }
 954
 955     if (i->may_move_to)
 956         if (!i->may_move_to(i, dest))
 957             return FALSE;
 958
 959     return TRUE;
 960 }
 961
 962 /* Called from main context */
 963 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest) {
 964     pa_resampler *new_resampler;
 965     pa_sink *origin;
 966     pa_sink_input_move_hook_data hook_data;
 967     pa_source_output *o, *p = NULL;
 968
 969     pa_sink_input_assert_ref(i);
 970     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 971     pa_sink_assert_ref(dest);
 972
 973     origin = i->sink;
 974
 975     if (dest == origin)
 976         return 0;
 977
 978     if (!pa_sink_input_may_move_to(i, dest))
 979         return -1;
 980
 981     /* Kill directly connected outputs */
 982     while ((o = pa_idxset_first(i->direct_outputs, NULL))) {
 983         pa_assert(o != p);
 984         pa_source_output_kill(o);
 985         p = o;
 986     }
 987
 988     if (i->thread_info.resampler &&
 989         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 990         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 991
 992         /* Try to reuse the old resampler if possible */
 993         new_resampler = i->thread_info.resampler;
 994
 995     else if ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 996              !pa_sample_spec_equal(&i->sample_spec, &dest->sample_spec) ||
 997              !pa_channel_map_equal(&i->channel_map, &dest->channel_map)) {
 998
 999         /* Okey, we need a new resampler for the new sink */
1000
1001         if (!(new_resampler = pa_resampler_new(
1002                       dest->core->mempool,
1003                       &i->sample_spec, &i->channel_map,
1004                       &dest->sample_spec, &dest->channel_map,
1005                       i->resample_method,
1006                       ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
1007                       ((i->flags & PA_SINK_INPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
1008                       (i->core->disable_remixing || (i->flags & PA_SINK_INPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
1009             pa_log_warn("Unsupported resampling operation.");
1010             return -1;
1011         }
1012     } else
1013         new_resampler = NULL;
1014
1015     hook_data.sink_input = i;
1016     hook_data.destination = dest;
1017     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE], &hook_data);
1018
1019     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_START_MOVE, i, 0, NULL) == 0);
1020
1021     pa_idxset_remove_by_data(origin->inputs, i, NULL);
1022     pa_idxset_put(dest->inputs, i, NULL);
1023     i->sink = dest;
1024
1025     if (pa_sink_input_get_state(i) == PA_SINK_INPUT_CORKED) {
1026         pa_assert_se(origin->n_corked-- >= 1);
1027         dest->n_corked++;
1028     }
1029
1030     /* Replace resampler and render queue */
1031     if (new_resampler != i->thread_info.resampler) {
1032
1033         if (i->thread_info.resampler)
1034             pa_resampler_free(i->thread_info.resampler);
1035         i->thread_info.resampler = new_resampler;
1036
1037         pa_memblockq_free(i->thread_info.render_memblockq);
1038
1039         i->thread_info.render_memblockq = pa_memblockq_new(
1040                 0,
1041                 MEMBLOCKQ_MAXLENGTH,
1042                 0,
1043                 pa_frame_size(&i->sink->sample_spec),
1044                 0,
1045                 1,
1046                 0,
1047                 &i->sink->silence);
1048     }
1049
1050     pa_sink_update_status(origin);
1051     pa_sink_update_status(dest);
1052
1053     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_FINISH_MOVE, i, 0, NULL) == 0);
1054
1055     if (i->moved)
1056         i->moved(i);
1057
1058     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_POST], i);
1059
1060     pa_log_debug("Successfully moved sink input %i from %s to %s.", i->index, origin->name, dest->name);
1061
1062     /* Notify everyone */
1063     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
1064
1065     return 0;
1066 }
1067
1068 /* Called from IO thread context */
1069 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state) {
1070     pa_bool_t corking, uncorking;
1071     pa_sink_input_assert_ref(i);
1072
1073     if (state == i->thread_info.state)
1074         return;
1075
1076     if ((state == PA_SINK_INPUT_DRAINED || state == PA_SINK_INPUT_RUNNING) &&
1077         !(i->thread_info.state == PA_SINK_INPUT_DRAINED || i->thread_info.state != PA_SINK_INPUT_RUNNING))
1078         pa_atomic_store(&i->thread_info.drained, 1);
1079
1080     corking = state == PA_SINK_INPUT_CORKED && i->thread_info.state == PA_SINK_INPUT_RUNNING;
1081     uncorking = i->thread_info.state == PA_SINK_INPUT_CORKED && state == PA_SINK_INPUT_RUNNING;
1082
1083     if (i->state_change)
1084         i->state_change(i, state);
1085
1086     i->thread_info.state = state;
1087
1088     if (corking) {
1089
1090         pa_log_debug("Requesting rewind due to corking");
1091
1092         /* This will tell the implementing sink input driver to rewind
1093          * so that the unplayed already mixed data is not lost */
1094         pa_sink_input_request_rewind(i, 0, TRUE, TRUE);
1095
1096     } else if (uncorking) {
1097
1098         i->thread_info.underrun_for = (uint64_t) -1;
1099         i->thread_info.playing_for = 0;
1100
1101         pa_log_debug("Requesting rewind due to uncorking");
1102
1103         /* OK, we're being uncorked. Make sure we're not rewound when
1104          * the hw buffer is remixed and request a remix. */
1105         pa_sink_input_request_rewind(i, 0, FALSE, TRUE);
1106     }
1107 }
1108
1109 /* Called from thread context, except when it is not. */
1110 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
1111     pa_sink_input *i = PA_SINK_INPUT(o);
1112     pa_sink_input_assert_ref(i);
1113
1114     switch (code) {
1115
1116         case PA_SINK_INPUT_MESSAGE_SET_VOLUME:
1117             i->thread_info.volume = *((pa_cvolume*) userdata);
1118             pa_sink_input_request_rewind(i, 0, TRUE, FALSE);
1119             return 0;
1120
1121         case PA_SINK_INPUT_MESSAGE_SET_MUTE:
1122             i->thread_info.muted = PA_PTR_TO_UINT(userdata);
1123             pa_sink_input_request_rewind(i, 0, TRUE, FALSE);
1124             return 0;
1125
1126         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
1127             pa_usec_t *r = userdata;
1128             pa_usec_t sink_usec = 0;
1129
1130             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(i->thread_info.render_memblockq), &i->sink->sample_spec);
1131
1132             if (i->sink->parent.process_msg(PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_GET_LATENCY, &sink_usec, 0, NULL) >= 0)
1133                 r[1] += sink_usec;
1134
1135             return 0;
1136         }
1137
1138         case PA_SINK_INPUT_MESSAGE_SET_RATE:
1139
1140             i->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
1141             pa_resampler_set_input_rate(i->thread_info.resampler, PA_PTR_TO_UINT(userdata));
1142
1143             return 0;
1144
1145         case PA_SINK_INPUT_MESSAGE_SET_STATE: {
1146             pa_sink_input *ssync;
1147
1148             pa_sink_input_set_state_within_thread(i, PA_PTR_TO_UINT(userdata));
1149
1150             for (ssync = i->thread_info.sync_prev; ssync; ssync = ssync->thread_info.sync_prev)
1151                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1152
1153             for (ssync = i->thread_info.sync_next; ssync; ssync = ssync->thread_info.sync_next)
1154                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1155
1156             return 0;
1157         }
1158
1159         case PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY: {
1160             pa_usec_t *usec = userdata;
1161
1162             *usec = pa_sink_input_set_requested_latency_within_thread(i, *usec);
1163             return 0;
1164         }
1165
1166         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
1167             pa_usec_t *r = userdata;
1168
1169             *r = i->thread_info.requested_sink_latency;
1170             return 0;
1171         }
1172     }
1173
1174     return -1;
1175 }
1176
1177 /* Called from main thread */
1178 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
1179     pa_sink_input_assert_ref(i);
1180
1181     if (i->state == PA_SINK_INPUT_RUNNING || i->state == PA_SINK_INPUT_DRAINED)
1182         return pa_atomic_load(&i->thread_info.drained) ? PA_SINK_INPUT_DRAINED : PA_SINK_INPUT_RUNNING;
1183
1184     return i->state;
1185 }
1186
1187 /* Called from IO context */
1188 pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i) {
1189     pa_sink_input_assert_ref(i);
1190
1191     if (PA_SINK_INPUT_IS_LINKED(i->thread_info.state))
1192         return pa_memblockq_is_empty(i->thread_info.render_memblockq);
1193
1194     return TRUE;
1195 }
1196
1197 /* Called from IO context */
1198 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) {
1199     size_t lbq;
1200
1201     /* If 'rewrite' is TRUE the sink is rewound as far as requested
1202      * and possible and the exact value of this is passed back the
1203      * implementor via process_rewind(). If 'flush' is also TRUE all
1204      * already rendered data is also dropped.
1205      *
1206      * If 'rewrite' is FALSE the sink is rewound as far as requested
1207      * and possible and the already rendered data is dropped so that
1208      * in the next iteration we read new data from the
1209      * implementor. This implies 'flush' is TRUE. */
1210
1211     pa_sink_input_assert_ref(i);
1212
1213     nbytes = PA_MAX(i->thread_info.rewrite_nbytes, nbytes);
1214
1215 /*     pa_log_debug("request rewrite %lu", (unsigned long) nbytes); */
1216
1217     /* We don't take rewind requests while we are corked */
1218     if (i->thread_info.state == PA_SINK_INPUT_CORKED)
1219         return;
1220
1221     pa_assert(rewrite || flush);
1222
1223     /* Calculate how much we can rewind locally without having to
1224      * touch the sink */
1225     if (rewrite)
1226         lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
1227     else
1228         lbq = 0;
1229
1230     /* Check if rewinding for the maximum is requested, and if so, fix up */
1231     if (nbytes <= 0) {
1232
1233         /* Calculate maximum number of bytes that could be rewound in theory */
1234         nbytes = i->sink->thread_info.max_rewind + lbq;
1235
1236         /* Transform from sink domain */
1237         if (i->thread_info.resampler)
1238             nbytes = pa_resampler_request(i->thread_info.resampler, nbytes);
1239     }
1240
1241     if (i->thread_info.rewrite_nbytes != (size_t) -1) {
1242         if (rewrite) {
1243             /* Make sure to not overwrite over underruns */
1244             if (nbytes > i->thread_info.playing_for)
1245                 nbytes = (size_t) i->thread_info.playing_for;
1246
1247             i->thread_info.rewrite_nbytes = nbytes;
1248         } else
1249             i->thread_info.rewrite_nbytes = (size_t) -1;
1250     }
1251
1252     i->thread_info.rewrite_flush =
1253         i->thread_info.rewrite_flush ||
1254         (flush && i->thread_info.rewrite_nbytes != 0);
1255
1256     if (nbytes != (size_t) -1) {
1257
1258         /* Transform to sink domain */
1259         if (i->thread_info.resampler)
1260             nbytes = pa_resampler_result(i->thread_info.resampler, nbytes);
1261
1262         if (nbytes > lbq)
1263             pa_sink_request_rewind(i->sink, nbytes - lbq);
1264         else
1265             /* This call will make sure process_rewind() is called later */
1266             pa_sink_request_rewind(i->sink, 0);
1267     }
1268 }
1269
1270 /* Called from main context */
1271 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret) {
1272     pa_sink_input_assert_ref(i);
1273     pa_assert(ret);
1274
1275     pa_silence_memchunk_get(
1276                 &i->sink->core->silence_cache,
1277                 i->sink->core->mempool,
1278                 ret,
1279                 &i->sample_spec,
1280                 i->thread_info.resampler ? pa_resampler_max_block_size(i->thread_info.resampler) : 0);
1281
1282     return ret;
1283 }