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.dont_rewind_render = FALSE;
 269     i->thread_info.underrun_for = (uint64_t) -1;
 270     i->thread_info.playing_for = 0;
 271     i->thread_info.direct_outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 272
 273     i->thread_info.render_memblockq = pa_memblockq_new(
 274             0,
 275             MEMBLOCKQ_MAXLENGTH,
 276             0,
 277             pa_frame_size(&i->sink->sample_spec),
 278             0,
 279             1,
 280             0,
 281             &i->sink->silence);
 282
 283     pa_assert_se(pa_idxset_put(core->sink_inputs, pa_sink_input_ref(i), &i->index) == 0);
 284     pa_assert_se(pa_idxset_put(i->sink->inputs, i, NULL) == 0);
 285
 286     pa_log_info("Created input %u \"%s\" on %s with sample spec %s and channel map %s",
 287                 i->index,
 288                 pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME)),
 289                 i->sink->name,
 290                 pa_sample_spec_snprint(st, sizeof(st), &i->sample_spec),
 291                 pa_channel_map_snprint(cm, sizeof(cm), &i->channel_map));
 292
 293     /* Don't forget to call pa_sink_input_put! */
 294
 295     return i;
 296 }
 297
 298 /* Called from main context */
 299 static void update_n_corked(pa_sink_input *i, pa_sink_input_state_t state) {
 300     pa_assert(i);
 301
 302     if (i->state == PA_SINK_INPUT_CORKED && state != PA_SINK_INPUT_CORKED)
 303         pa_assert_se(i->sink->n_corked -- >= 1);
 304     else if (i->state != PA_SINK_INPUT_CORKED && state == PA_SINK_INPUT_CORKED)
 305         i->sink->n_corked++;
 306 }
 307
 308 /* Called from main context */
 309 static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
 310     pa_sink_input *ssync;
 311     pa_assert(i);
 312
 313     if (state == PA_SINK_INPUT_DRAINED)
 314         state = PA_SINK_INPUT_RUNNING;
 315
 316     if (i->state == state)
 317         return 0;
 318
 319     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);
 320
 321     update_n_corked(i, state);
 322     i->state = state;
 323
 324     for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev) {
 325         update_n_corked(ssync, state);
 326         ssync->state = state;
 327     }
 328     for (ssync = i->sync_next; ssync; ssync = ssync->sync_next) {
 329         update_n_corked(ssync, state);
 330         ssync->state = state;
 331     }
 332
 333     if (state != PA_SINK_INPUT_UNLINKED) {
 334         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], i);
 335
 336         for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev)
 337             pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 338
 339         for (ssync = i->sync_next; ssync; ssync = ssync->sync_next)
 340             pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 341     }
 342
 343     pa_sink_update_status(i->sink);
 344
 345     return 0;
 346 }
 347
 348 /* Called from main context */
 349 void pa_sink_input_unlink(pa_sink_input *i) {
 350     pa_bool_t linked;
 351     pa_source_output *o, *p =  NULL;
 352     pa_assert(i);
 353
 354     /* See pa_sink_unlink() for a couple of comments how this function
 355      * works */
 356
 357     pa_sink_input_ref(i);
 358
 359     linked = PA_SINK_INPUT_IS_LINKED(i->state);
 360
 361     if (linked)
 362         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], i);
 363
 364     if (i->sync_prev)
 365         i->sync_prev->sync_next = i->sync_next;
 366     if (i->sync_next)
 367         i->sync_next->sync_prev = i->sync_prev;
 368
 369     i->sync_prev = i->sync_next = NULL;
 370
 371     pa_idxset_remove_by_data(i->sink->core->sink_inputs, i, NULL);
 372     if (pa_idxset_remove_by_data(i->sink->inputs, i, NULL))
 373         pa_sink_input_unref(i);
 374
 375     while ((o = pa_idxset_first(i->direct_outputs, NULL))) {
 376         pa_assert(o != p);
 377         pa_source_output_kill(o);
 378         p = o;
 379     }
 380
 381     update_n_corked(i, PA_SINK_INPUT_UNLINKED);
 382     i->state = PA_SINK_INPUT_UNLINKED;
 383
 384     if (linked)
 385         if (i->sink->asyncmsgq)
 386             pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT, i, 0, NULL) == 0);
 387
 388     reset_callbacks(i);
 389
 390     if (linked) {
 391         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 392         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK_POST], i);
 393     }
 394
 395     pa_sink_update_status(i->sink);
 396
 397     i->sink = NULL;
 398     pa_sink_input_unref(i);
 399 }
 400
 401 /* Called from main context */
 402 static void sink_input_free(pa_object *o) {
 403     pa_sink_input* i = PA_SINK_INPUT(o);
 404
 405     pa_assert(i);
 406     pa_assert(pa_sink_input_refcnt(i) == 0);
 407
 408     if (PA_SINK_INPUT_IS_LINKED(i->state))
 409         pa_sink_input_unlink(i);
 410
 411     pa_log_info("Freeing input %u \"%s\"", i->index, pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME)));
 412
 413     pa_assert(!i->thread_info.attached);
 414
 415     if (i->thread_info.render_memblockq)
 416         pa_memblockq_free(i->thread_info.render_memblockq);
 417
 418     if (i->thread_info.resampler)
 419         pa_resampler_free(i->thread_info.resampler);
 420
 421     if (i->proplist)
 422         pa_proplist_free(i->proplist);
 423
 424     if (i->direct_outputs)
 425         pa_idxset_free(i->direct_outputs, NULL, NULL);
 426
 427     if (i->thread_info.direct_outputs)
 428         pa_hashmap_free(i->thread_info.direct_outputs, NULL, NULL);
 429
 430     pa_xfree(i->driver);
 431     pa_xfree(i);
 432 }
 433
 434 /* Called from main context */
 435 void pa_sink_input_put(pa_sink_input *i) {
 436     pa_sink_input_state_t state;
 437     pa_sink_input_assert_ref(i);
 438
 439     pa_assert(i->state == PA_SINK_INPUT_INIT);
 440
 441     /* The following fields must be initialized properly */
 442     pa_assert(i->pop);
 443     pa_assert(i->process_rewind);
 444     pa_assert(i->kill);
 445
 446     i->thread_info.volume = i->volume;
 447     i->thread_info.muted = i->muted;
 448
 449     state = i->flags & PA_SINK_INPUT_START_CORKED ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 450
 451     update_n_corked(i, state);
 452     i->state = state;
 453
 454     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL) == 0);
 455
 456     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
 457     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
 458
 459     pa_sink_update_status(i->sink);
 460 }
 461
 462 /* Called from main context */
 463 void pa_sink_input_kill(pa_sink_input*i) {
 464     pa_sink_input_assert_ref(i);
 465     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 466
 467     i->kill(i);
 468 }
 469
 470 /* Called from main context */
 471 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency) {
 472     pa_usec_t r[2] = { 0, 0 };
 473
 474     pa_sink_input_assert_ref(i);
 475     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 476
 477     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 478
 479     if (i->get_latency)
 480         r[0] += i->get_latency(i);
 481
 482     if (sink_latency)
 483         *sink_latency = r[1];
 484
 485     return r[0];
 486 }
 487
 488 /* Called from thread context */
 489 int pa_sink_input_peek(pa_sink_input *i, size_t slength /* in sink frames */, pa_memchunk *chunk, pa_cvolume *volume) {
 490     pa_bool_t do_volume_adj_here;
 491     pa_bool_t volume_is_norm;
 492     size_t block_size_max_sink, block_size_max_sink_input;
 493     size_t ilength;
 494
 495     pa_sink_input_assert_ref(i);
 496     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 497     pa_assert(pa_frame_aligned(slength, &i->sink->sample_spec));
 498     pa_assert(chunk);
 499     pa_assert(volume);
 500
 501 /*     pa_log_debug("peek"); */
 502
 503     if (!i->pop)
 504         return -1;
 505
 506     pa_assert(i->thread_info.state == PA_SINK_INPUT_RUNNING ||
 507               i->thread_info.state == PA_SINK_INPUT_CORKED ||
 508               i->thread_info.state == PA_SINK_INPUT_DRAINED);
 509
 510     block_size_max_sink_input = i->thread_info.resampler ?
 511         pa_resampler_max_block_size(i->thread_info.resampler) :
 512         pa_frame_align(pa_mempool_block_size_max(i->sink->core->mempool), &i->sample_spec);
 513
 514     block_size_max_sink = pa_frame_align(pa_mempool_block_size_max(i->sink->core->mempool), &i->sink->sample_spec);
 515
 516     /* Default buffer size */
 517     if (slength <= 0)
 518         slength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sink->sample_spec);
 519
 520     if (slength > block_size_max_sink)
 521         slength = block_size_max_sink;
 522
 523     if (i->thread_info.resampler) {
 524         ilength = pa_resampler_request(i->thread_info.resampler, slength);
 525
 526         if (ilength <= 0)
 527             ilength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sample_spec);
 528     } else
 529         ilength = slength;
 530
 531     if (ilength > block_size_max_sink_input)
 532         ilength = block_size_max_sink_input;
 533
 534     /* If the channel maps of the sink and this stream differ, we need
 535      * to adjust the volume *before* we resample. Otherwise we can do
 536      * it after and leave it for the sink code */
 537
 538     do_volume_adj_here = !pa_channel_map_equal(&i->channel_map, &i->sink->channel_map);
 539     volume_is_norm = pa_cvolume_is_norm(&i->thread_info.volume) && !i->thread_info.muted;
 540
 541     while (!pa_memblockq_is_readable(i->thread_info.render_memblockq)) {
 542         pa_memchunk tchunk;
 543
 544         /* There's nothing in our render queue. We need to fill it up
 545          * with data from the implementor. */
 546
 547         if (i->thread_info.state == PA_SINK_INPUT_CORKED ||
 548             i->pop(i, ilength, &tchunk) < 0) {
 549
 550             /* OK, we're corked or the implementor didn't give us any
 551              * data, so let's just hand out silence */
 552             pa_atomic_store(&i->thread_info.drained, 1);
 553
 554             pa_memblockq_seek(i->thread_info.render_memblockq, (int64_t) slength, PA_SEEK_RELATIVE);
 555             i->thread_info.playing_for = 0;
 556             if (i->thread_info.underrun_for != (uint64_t) -1)
 557                 i->thread_info.underrun_for += ilength;
 558             break;
 559         }
 560
 561         pa_atomic_store(&i->thread_info.drained, 0);
 562
 563         pa_assert(tchunk.length > 0);
 564         pa_assert(tchunk.memblock);
 565
 566         i->thread_info.underrun_for = 0;
 567         i->thread_info.playing_for += tchunk.length;
 568
 569         while (tchunk.length > 0) {
 570             pa_memchunk wchunk;
 571
 572             wchunk = tchunk;
 573             pa_memblock_ref(wchunk.memblock);
 574
 575             if (wchunk.length > block_size_max_sink_input)
 576                 wchunk.length = block_size_max_sink_input;
 577
 578             /* It might be necessary to adjust the volume here */
 579             if (do_volume_adj_here && !volume_is_norm) {
 580                 pa_memchunk_make_writable(&wchunk, 0);
 581
 582                 if (i->thread_info.muted)
 583                     pa_silence_memchunk(&wchunk, &i->thread_info.sample_spec);
 584                 else
 585                     pa_volume_memchunk(&wchunk, &i->thread_info.sample_spec, &i->thread_info.volume);
 586             }
 587
 588             if (!i->thread_info.resampler)
 589                 pa_memblockq_push_align(i->thread_info.render_memblockq, &wchunk);
 590             else {
 591                 pa_memchunk rchunk;
 592                 pa_resampler_run(i->thread_info.resampler, &wchunk, &rchunk);
 593
 594 /*                 pa_log_debug("pushing %lu", (unsigned long) rchunk.length); */
 595
 596                 if (rchunk.memblock) {
 597                     pa_memblockq_push_align(i->thread_info.render_memblockq, &rchunk);
 598                     pa_memblock_unref(rchunk.memblock);
 599                 }
 600             }
 601
 602             pa_memblock_unref(wchunk.memblock);
 603
 604             tchunk.index += wchunk.length;
 605             tchunk.length -= wchunk.length;
 606         }
 607
 608         pa_memblock_unref(tchunk.memblock);
 609     }
 610
 611     pa_assert_se(pa_memblockq_peek(i->thread_info.render_memblockq, chunk) >= 0);
 612
 613     pa_assert(chunk->length > 0);
 614     pa_assert(chunk->memblock);
 615
 616 /*     pa_log_debug("peeking %lu", (unsigned long) chunk->length); */
 617
 618     if (chunk->length > block_size_max_sink)
 619         chunk->length = block_size_max_sink;
 620
 621     /* Let's see if we had to apply the volume adjustment ourselves,
 622      * or if this can be done by the sink for us */
 623
 624     if (do_volume_adj_here)
 625         /* We had different channel maps, so we already did the adjustment */
 626         pa_cvolume_reset(volume, i->sink->sample_spec.channels);
 627     else if (i->thread_info.muted)
 628         /* We've both the same channel map, so let's have the sink do the adjustment for us*/
 629         pa_cvolume_mute(volume, i->sink->sample_spec.channels);
 630     else
 631         *volume = i->thread_info.volume;
 632
 633     return 0;
 634 }
 635
 636 /* Called from thread context */
 637 void pa_sink_input_drop(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 638     pa_sink_input_assert_ref(i);
 639
 640     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 641     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 642     pa_assert(nbytes > 0);
 643
 644 /*     pa_log_debug("dropping %lu", (unsigned long) nbytes); */
 645
 646     pa_memblockq_drop(i->thread_info.render_memblockq, nbytes);
 647 }
 648
 649 /* Called from thread context */
 650 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 651     size_t lbq;
 652     pa_bool_t called = FALSE;
 653     pa_sink_input_assert_ref(i);
 654
 655     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 656     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 657
 658 /*     pa_log_debug("rewind(%lu, %lu)", (unsigned long) nbytes, (unsigned long) i->thread_info.rewrite_nbytes); */
 659
 660     lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
 661
 662     if (nbytes > 0 && !i->thread_info.dont_rewind_render) {
 663         pa_log_debug("Have to rewind %lu bytes on render memblockq.", (unsigned long) nbytes);
 664         pa_memblockq_rewind(i->thread_info.render_memblockq, nbytes);
 665     }
 666
 667     if (i->thread_info.rewrite_nbytes == (size_t) -1) {
 668
 669         /* We were asked to drop all buffered data, and rerequest new
 670          * data from implementor the next time push() is called */
 671
 672         pa_memblockq_flush_write(i->thread_info.render_memblockq);
 673
 674     } else if (i->thread_info.rewrite_nbytes > 0) {
 675         size_t max_rewrite, amount;
 676
 677         /* Calculate how much make sense to rewrite at most */
 678         max_rewrite = nbytes + lbq;
 679
 680         /* Transform into local domain */
 681         if (i->thread_info.resampler)
 682             max_rewrite = pa_resampler_request(i->thread_info.resampler, max_rewrite);
 683
 684         /* Calculate how much of the rewinded data should actually be rewritten */
 685         amount = PA_MIN(i->thread_info.rewrite_nbytes, max_rewrite);
 686
 687         if (amount > 0) {
 688             pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) amount);
 689
 690             /* Tell the implementor */
 691             if (i->process_rewind)
 692                 i->process_rewind(i, amount);
 693             called = TRUE;
 694
 695             /* Convert back to to sink domain */
 696             if (i->thread_info.resampler)
 697                 amount = pa_resampler_result(i->thread_info.resampler, amount);
 698
 699             if (amount > 0)
 700                 /* Ok, now update the write pointer */
 701                 pa_memblockq_seek(i->thread_info.render_memblockq, - ((int64_t) amount), PA_SEEK_RELATIVE);
 702
 703             if (i->thread_info.rewrite_flush)
 704                 pa_memblockq_silence(i->thread_info.render_memblockq);
 705
 706             /* And reset the resampler */
 707             if (i->thread_info.resampler)
 708                 pa_resampler_reset(i->thread_info.resampler);
 709         }
 710     }
 711
 712     if (!called)
 713         if (i->process_rewind)
 714             i->process_rewind(i, 0);
 715
 716     i->thread_info.rewrite_nbytes = 0;
 717     i->thread_info.rewrite_flush = FALSE;
 718     i->thread_info.dont_rewind_render = FALSE;
 719 }
 720
 721 /* Called from thread context */
 722 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 723     pa_sink_input_assert_ref(i);
 724     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 725     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 726
 727     pa_memblockq_set_maxrewind(i->thread_info.render_memblockq, nbytes);
 728
 729     if (i->update_max_rewind)
 730         i->update_max_rewind(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 731 }
 732
 733 /* Called from thread context */
 734 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 735     pa_sink_input_assert_ref(i);
 736     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 737     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 738
 739     if (i->update_max_request)
 740         i->update_max_request(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 741 }
 742
 743 /* Called from thread context */
 744 static pa_usec_t fixup_latency(pa_sink *s, pa_usec_t usec) {
 745     pa_sink_assert_ref(s);
 746
 747     if (usec == (pa_usec_t) -1)
 748         return usec;
 749
 750     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 751         usec = s->thread_info.max_latency;
 752
 753     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 754         usec = s->thread_info.min_latency;
 755
 756     return usec;
 757 }
 758
 759 /* Called from thread context */
 760 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec) {
 761     pa_sink_input_assert_ref(i);
 762
 763     usec = fixup_latency(i->sink, usec);
 764     i->thread_info.requested_sink_latency = usec;
 765     pa_sink_invalidate_requested_latency(i->sink);
 766
 767     return usec;
 768 }
 769
 770 /* Called from main context */
 771 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec) {
 772     pa_sink_input_assert_ref(i);
 773
 774     if (PA_SINK_INPUT_IS_LINKED(i->state))
 775         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 776     else
 777         /* If this sink input is not realized yet, we have to touch
 778          * the thread info data directly */
 779
 780         i->thread_info.requested_sink_latency = usec;
 781
 782     return usec;
 783 }
 784
 785 /* Called from main context */
 786 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i) {
 787     pa_usec_t usec = 0;
 788
 789     pa_sink_input_assert_ref(i);
 790
 791     if (PA_SINK_INPUT_IS_LINKED(i->state))
 792         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 793     else
 794         /* If this sink input is not realized yet, we have to touch
 795          * the thread info data directly */
 796         usec = i->thread_info.requested_sink_latency;
 797
 798     return usec;
 799 }
 800
 801 /* Called from main context */
 802 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume) {
 803     pa_sink_input_set_volume_data data;
 804
 805     pa_sink_input_assert_ref(i);
 806     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 807     pa_assert(volume);
 808     pa_assert(pa_cvolume_valid(volume));
 809     pa_assert(pa_cvolume_compatible(volume, &i->sample_spec));
 810
 811     data.sink_input = i;
 812     data.virtual_volume = *volume;
 813     data.volume = *volume;
 814
 815     /* If you change something here, consider looking into
 816      * module-flat-volume.c as well since it uses very similar
 817      * code. */
 818
 819     if (pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_SET_VOLUME], &data) < 0)
 820         return;
 821
 822     if (!pa_cvolume_equal(&i->volume, &data.volume)) {
 823         i->volume = data.volume;
 824         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_VOLUME, &data.volume, 0, NULL) == 0);
 825     }
 826
 827     if (!pa_cvolume_equal(&i->virtual_volume, &data.virtual_volume)) {
 828         i->virtual_volume = data.virtual_volume;
 829         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 830     }
 831 }
 832
 833 /* Called from main context */
 834 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
 835     pa_sink_input_assert_ref(i);
 836     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 837
 838     return &i->virtual_volume;
 839 }
 840
 841 /* Called from main context */
 842 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute) {
 843     pa_assert(i);
 844     pa_sink_input_assert_ref(i);
 845     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 846
 847     if (!i->muted == !mute)
 848         return;
 849
 850     i->muted = mute;
 851
 852     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
 853     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 854 }
 855
 856 /* Called from main context */
 857 pa_bool_t pa_sink_input_get_mute(pa_sink_input *i) {
 858     pa_sink_input_assert_ref(i);
 859     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 860
 861     return i->muted;
 862 }
 863
 864 /* Called from main thread */
 865 pa_bool_t pa_sink_input_update_proplist(pa_sink_input *i, pa_update_mode_t mode, pa_proplist *p) {
 866
 867   pa_sink_input_assert_ref(i);
 868
 869   pa_proplist_update(i->proplist, mode, p);
 870
 871   if (PA_SINK_IS_LINKED(i->state)) {
 872       pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], i);
 873       pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 874   }
 875
 876   return TRUE;
 877 }
 878
 879 /* Called from main context */
 880 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b) {
 881     pa_sink_input_assert_ref(i);
 882     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 883
 884     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 885 }
 886
 887 /* Called from main context */
 888 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
 889     pa_sink_input_assert_ref(i);
 890     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 891     pa_return_val_if_fail(i->thread_info.resampler, -1);
 892
 893     if (i->sample_spec.rate == rate)
 894         return 0;
 895
 896     i->sample_spec.rate = rate;
 897
 898     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 899
 900     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 901     return 0;
 902 }
 903
 904 /* Called from main context */
 905 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
 906     const char *old;
 907     pa_sink_input_assert_ref(i);
 908
 909     if (!name && !pa_proplist_contains(i->proplist, PA_PROP_MEDIA_NAME))
 910         return;
 911
 912     old = pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME);
 913
 914     if (old && name && !strcmp(old, name))
 915         return;
 916
 917     if (name)
 918         pa_proplist_sets(i->proplist, PA_PROP_MEDIA_NAME, name);
 919     else
 920         pa_proplist_unset(i->proplist, PA_PROP_MEDIA_NAME);
 921
 922     if (PA_SINK_INPUT_IS_LINKED(i->state)) {
 923         pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], i);
 924         pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 925     }
 926 }
 927
 928 /* Called from main context */
 929 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
 930     pa_sink_input_assert_ref(i);
 931
 932     return i->resample_method;
 933 }
 934
 935 /* Called from main context */
 936 pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest) {
 937     pa_sink_input_assert_ref(i);
 938     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 939     pa_sink_assert_ref(dest);
 940
 941     if (dest == i->sink)
 942         return TRUE;
 943
 944     if (i->flags & PA_SINK_INPUT_DONT_MOVE)
 945         return FALSE;
 946
 947     if (i->sync_next || i->sync_prev) {
 948         pa_log_warn("Moving synchronised streams not supported.");
 949         return FALSE;
 950     }
 951
 952     if (pa_idxset_size(dest->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 953         pa_log_warn("Failed to move sink input: too many inputs per sink.");
 954         return FALSE;
 955     }
 956
 957     if (i->may_move_to)
 958         if (!i->may_move_to(i, dest))
 959             return FALSE;
 960
 961     return TRUE;
 962 }
 963
 964 /* Called from main context */
 965 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest) {
 966     pa_resampler *new_resampler;
 967     pa_sink *origin;
 968     pa_sink_input_move_hook_data hook_data;
 969     pa_source_output *o, *p = NULL;
 970
 971     pa_sink_input_assert_ref(i);
 972     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 973     pa_sink_assert_ref(dest);
 974
 975     origin = i->sink;
 976
 977     if (dest == origin)
 978         return 0;
 979
 980     if (!pa_sink_input_may_move_to(i, dest))
 981         return -1;
 982
 983     /* Kill directly connected outputs */
 984     while ((o = pa_idxset_first(i->direct_outputs, NULL))) {
 985         pa_assert(o != p);
 986         pa_source_output_kill(o);
 987         p = o;
 988     }
 989
 990     if (i->thread_info.resampler &&
 991         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 992         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 993
 994         /* Try to reuse the old resampler if possible */
 995         new_resampler = i->thread_info.resampler;
 996
 997     else if ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 998              !pa_sample_spec_equal(&i->sample_spec, &dest->sample_spec) ||
 999              !pa_channel_map_equal(&i->channel_map, &dest->channel_map)) {
1000
1001         /* Okey, we need a new resampler for the new sink */
1002
1003         if (!(new_resampler = pa_resampler_new(
1004                       dest->core->mempool,
1005                       &i->sample_spec, &i->channel_map,
1006                       &dest->sample_spec, &dest->channel_map,
1007                       i->resample_method,
1008                       ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
1009                       ((i->flags & PA_SINK_INPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
1010                       (i->core->disable_remixing || (i->flags & PA_SINK_INPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
1011             pa_log_warn("Unsupported resampling operation.");
1012             return -1;
1013         }
1014     } else
1015         new_resampler = NULL;
1016
1017     hook_data.sink_input = i;
1018     hook_data.destination = dest;
1019     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE], &hook_data);
1020
1021     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_START_MOVE, i, 0, NULL) == 0);
1022
1023     pa_idxset_remove_by_data(origin->inputs, i, NULL);
1024     pa_idxset_put(dest->inputs, i, NULL);
1025     i->sink = dest;
1026
1027     if (pa_sink_input_get_state(i) == PA_SINK_INPUT_CORKED) {
1028         pa_assert_se(origin->n_corked-- >= 1);
1029         dest->n_corked++;
1030     }
1031
1032     /* Replace resampler and render queue */
1033     if (new_resampler != i->thread_info.resampler) {
1034
1035         if (i->thread_info.resampler)
1036             pa_resampler_free(i->thread_info.resampler);
1037         i->thread_info.resampler = new_resampler;
1038
1039         pa_memblockq_free(i->thread_info.render_memblockq);
1040
1041         i->thread_info.render_memblockq = pa_memblockq_new(
1042                 0,
1043                 MEMBLOCKQ_MAXLENGTH,
1044                 0,
1045                 pa_frame_size(&i->sink->sample_spec),
1046                 0,
1047                 1,
1048                 0,
1049                 &i->sink->silence);
1050     }
1051
1052     pa_sink_update_status(origin);
1053     pa_sink_update_status(dest);
1054
1055     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_FINISH_MOVE, i, 0, NULL) == 0);
1056
1057     if (i->moved)
1058         i->moved(i);
1059
1060     pa_hook_fire(&i->sink->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_POST], i);
1061
1062     pa_log_debug("Successfully moved sink input %i from %s to %s.", i->index, origin->name, dest->name);
1063
1064     /* Notify everyone */
1065     pa_subscription_post(i->sink->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
1066
1067     return 0;
1068 }
1069
1070 /* Called from IO thread context */
1071 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state) {
1072     pa_bool_t corking, uncorking;
1073     pa_sink_input_assert_ref(i);
1074
1075     if (state == i->thread_info.state)
1076         return;
1077
1078     if ((state == PA_SINK_INPUT_DRAINED || state == PA_SINK_INPUT_RUNNING) &&
1079         !(i->thread_info.state == PA_SINK_INPUT_DRAINED || i->thread_info.state != PA_SINK_INPUT_RUNNING))
1080         pa_atomic_store(&i->thread_info.drained, 1);
1081
1082     corking = state == PA_SINK_INPUT_CORKED && i->thread_info.state == PA_SINK_INPUT_RUNNING;
1083     uncorking = i->thread_info.state == PA_SINK_INPUT_CORKED && state == PA_SINK_INPUT_RUNNING;
1084
1085     if (i->state_change)
1086         i->state_change(i, state);
1087
1088     i->thread_info.state = state;
1089
1090     if (corking) {
1091
1092         pa_log_debug("Requesting rewind due to corking");
1093
1094         /* This will tell the implementing sink input driver to rewind
1095          * so that the unplayed already mixed data is not lost */
1096         pa_sink_input_request_rewind(i, 0, TRUE, TRUE, FALSE);
1097
1098     } else if (uncorking) {
1099
1100         i->thread_info.underrun_for = (uint64_t) -1;
1101         i->thread_info.playing_for = 0;
1102
1103         pa_log_debug("Requesting rewind due to uncorking");
1104
1105         /* OK, we're being uncorked. Make sure we're not rewound when
1106          * the hw buffer is remixed and request a remix. */
1107         pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
1108     }
1109 }
1110
1111 /* Called from thread context, except when it is not. */
1112 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
1113     pa_sink_input *i = PA_SINK_INPUT(o);
1114     pa_sink_input_assert_ref(i);
1115
1116     switch (code) {
1117
1118         case PA_SINK_INPUT_MESSAGE_SET_VOLUME:
1119             i->thread_info.volume = *((pa_cvolume*) userdata);
1120             pa_sink_input_request_rewind(i, 0, TRUE, FALSE, FALSE);
1121             return 0;
1122
1123         case PA_SINK_INPUT_MESSAGE_SET_MUTE:
1124             i->thread_info.muted = PA_PTR_TO_UINT(userdata);
1125             pa_sink_input_request_rewind(i, 0, TRUE, FALSE, FALSE);
1126             return 0;
1127
1128         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
1129             pa_usec_t *r = userdata;
1130             pa_usec_t sink_usec = 0;
1131
1132             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(i->thread_info.render_memblockq), &i->sink->sample_spec);
1133
1134             if (i->sink->parent.process_msg(PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_GET_LATENCY, &sink_usec, 0, NULL) >= 0)
1135                 r[1] += sink_usec;
1136
1137             return 0;
1138         }
1139
1140         case PA_SINK_INPUT_MESSAGE_SET_RATE:
1141
1142             i->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
1143             pa_resampler_set_input_rate(i->thread_info.resampler, PA_PTR_TO_UINT(userdata));
1144
1145             return 0;
1146
1147         case PA_SINK_INPUT_MESSAGE_SET_STATE: {
1148             pa_sink_input *ssync;
1149
1150             pa_sink_input_set_state_within_thread(i, PA_PTR_TO_UINT(userdata));
1151
1152             for (ssync = i->thread_info.sync_prev; ssync; ssync = ssync->thread_info.sync_prev)
1153                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1154
1155             for (ssync = i->thread_info.sync_next; ssync; ssync = ssync->thread_info.sync_next)
1156                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1157
1158             return 0;
1159         }
1160
1161         case PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY: {
1162             pa_usec_t *usec = userdata;
1163
1164             *usec = pa_sink_input_set_requested_latency_within_thread(i, *usec);
1165             return 0;
1166         }
1167
1168         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
1169             pa_usec_t *r = userdata;
1170
1171             *r = i->thread_info.requested_sink_latency;
1172             return 0;
1173         }
1174     }
1175
1176     return -1;
1177 }
1178
1179 /* Called from main thread */
1180 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
1181     pa_sink_input_assert_ref(i);
1182
1183     if (i->state == PA_SINK_INPUT_RUNNING || i->state == PA_SINK_INPUT_DRAINED)
1184         return pa_atomic_load(&i->thread_info.drained) ? PA_SINK_INPUT_DRAINED : PA_SINK_INPUT_RUNNING;
1185
1186     return i->state;
1187 }
1188
1189 /* Called from IO context */
1190 pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i) {
1191     pa_sink_input_assert_ref(i);
1192
1193     if (PA_SINK_INPUT_IS_LINKED(i->thread_info.state))
1194         return pa_memblockq_is_empty(i->thread_info.render_memblockq);
1195
1196     return TRUE;
1197 }
1198
1199 /* Called from IO context */
1200 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, pa_bool_t dont_rewind_render) {
1201     size_t lbq;
1202
1203     /* If 'rewrite' is TRUE the sink is rewound as far as requested
1204      * and possible and the exact value of this is passed back the
1205      * implementor via process_rewind(). If 'flush' is also TRUE all
1206      * already rendered data is also dropped.
1207      *
1208      * If 'rewrite' is FALSE the sink is rewound as far as requested
1209      * and possible and the already rendered data is dropped so that
1210      * in the next iteration we read new data from the
1211      * implementor. This implies 'flush' is TRUE.  If
1212      * dont_rewind_render is TRUE then the render memblockq is not
1213      * rewound. */
1214
1215     pa_sink_input_assert_ref(i);
1216
1217     nbytes = PA_MAX(i->thread_info.rewrite_nbytes, nbytes);
1218
1219 /*     pa_log_debug("request rewrite %lu", (unsigned long) nbytes); */
1220
1221     /* We don't take rewind requests while we are corked */
1222     if (i->thread_info.state == PA_SINK_INPUT_CORKED)
1223         return;
1224
1225     pa_assert(rewrite || flush);
1226     pa_assert(!dont_rewind_render || !rewrite);
1227
1228     /* Calculate how much we can rewind locally without having to
1229      * touch the sink */
1230     if (rewrite)
1231         lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
1232     else
1233         lbq = 0;
1234
1235     /* Check if rewinding for the maximum is requested, and if so, fix up */
1236     if (nbytes <= 0) {
1237
1238         /* Calculate maximum number of bytes that could be rewound in theory */
1239         nbytes = i->sink->thread_info.max_rewind + lbq;
1240
1241         /* Transform from sink domain */
1242         if (i->thread_info.resampler)
1243             nbytes = pa_resampler_request(i->thread_info.resampler, nbytes);
1244     }
1245
1246     if (i->thread_info.rewrite_nbytes != (size_t) -1) {
1247         if (rewrite) {
1248             /* Make sure to not overwrite over underruns */
1249             if (nbytes > i->thread_info.playing_for)
1250                 nbytes = (size_t) i->thread_info.playing_for;
1251
1252             i->thread_info.rewrite_nbytes = nbytes;
1253         } else
1254             i->thread_info.rewrite_nbytes = (size_t) -1;
1255     }
1256
1257     i->thread_info.rewrite_flush =
1258         i->thread_info.rewrite_flush ||
1259         (flush && i->thread_info.rewrite_nbytes != 0);
1260
1261     i->thread_info.dont_rewind_render =
1262         i->thread_info.dont_rewind_render ||
1263         dont_rewind_render;
1264
1265     if (nbytes != (size_t) -1) {
1266
1267         /* Transform to sink domain */
1268         if (i->thread_info.resampler)
1269             nbytes = pa_resampler_result(i->thread_info.resampler, nbytes);
1270
1271         if (nbytes > lbq)
1272             pa_sink_request_rewind(i->sink, nbytes - lbq);
1273         else
1274             /* This call will make sure process_rewind() is called later */
1275             pa_sink_request_rewind(i->sink, 0);
1276     }
1277 }
1278
1279 /* Called from main context */
1280 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret) {
1281     pa_sink_input_assert_ref(i);
1282     pa_assert(ret);
1283
1284     pa_silence_memchunk_get(
1285                 &i->sink->core->silence_cache,
1286                 i->sink->core->mempool,
1287                 ret,
1288                 &i->sample_spec,
1289                 i->thread_info.resampler ? pa_resampler_max_block_size(i->thread_info.resampler) : 0);
1290
1291     return ret;
1292 }