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 #include <pulse/util.h>
  34
  35 #include <pulsecore/sample-util.h>
  36 #include <pulsecore/core-subscribe.h>
  37 #include <pulsecore/log.h>
  38 #include <pulsecore/play-memblockq.h>
  39 #include <pulsecore/namereg.h>
  40 #include <pulsecore/core-util.h>
  41
  42 #include "sink-input.h"
  43
  44 #define MEMBLOCKQ_MAXLENGTH (32*1024*1024)
  45 #define CONVERT_BUFFER_LENGTH (PA_PAGE_SIZE)
  46
  47 static PA_DEFINE_CHECK_TYPE(pa_sink_input, pa_msgobject);
  48
  49 static void sink_input_free(pa_object *o);
  50
  51 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data) {
  52     pa_assert(data);
  53
  54     memset(data, 0, sizeof(*data));
  55     data->resample_method = PA_RESAMPLER_INVALID;
  56     data->proplist = pa_proplist_new();
  57
  58     return data;
  59 }
  60
  61 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec) {
  62     pa_assert(data);
  63
  64     if ((data->sample_spec_is_set = !!spec))
  65         data->sample_spec = *spec;
  66 }
  67
  68 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map) {
  69     pa_assert(data);
  70
  71     if ((data->channel_map_is_set = !!map))
  72         data->channel_map = *map;
  73 }
  74
  75 void pa_sink_input_new_data_set_soft_volume(pa_sink_input_new_data *data, const pa_cvolume *volume) {
  76     pa_assert(data);
  77
  78     if ((data->soft_volume_is_set = !!volume))
  79         data->soft_volume = *volume;
  80 }
  81
  82 void pa_sink_input_new_data_set_virtual_volume(pa_sink_input_new_data *data, const pa_cvolume *volume) {
  83     pa_assert(data);
  84
  85     if ((data->virtual_volume_is_set = !!volume))
  86         data->virtual_volume = *volume;
  87 }
  88
  89 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, pa_bool_t mute) {
  90     pa_assert(data);
  91
  92     data->muted_is_set = TRUE;
  93     data->muted = !!mute;
  94 }
  95
  96 void pa_sink_input_new_data_done(pa_sink_input_new_data *data) {
  97     pa_assert(data);
  98
  99     pa_proplist_free(data->proplist);
 100 }
 101
 102 /* Called from main context */
 103 static void reset_callbacks(pa_sink_input *i) {
 104     pa_assert(i);
 105
 106     i->pop = NULL;
 107     i->process_rewind = NULL;
 108     i->update_max_rewind = NULL;
 109     i->update_max_request = NULL;
 110     i->update_sink_requested_latency = NULL;
 111     i->update_sink_latency_range = NULL;
 112     i->attach = NULL;
 113     i->detach = NULL;
 114     i->suspend = NULL;
 115     i->moved = NULL;
 116     i->kill = NULL;
 117     i->get_latency = NULL;
 118     i->state_change = NULL;
 119     i->may_move_to = NULL;
 120 }
 121
 122 /* Called from main context */
 123 pa_sink_input* pa_sink_input_new(
 124         pa_core *core,
 125         pa_sink_input_new_data *data,
 126         pa_sink_input_flags_t flags) {
 127
 128     pa_sink_input *i;
 129     pa_resampler *resampler = NULL;
 130     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 131     pa_channel_map original_cm;
 132
 133     pa_assert(core);
 134     pa_assert(data);
 135
 136     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_INPUT_NEW], data) < 0)
 137         return NULL;
 138
 139     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
 140
 141     if (!data->sink) {
 142         data->sink = pa_namereg_get(core, NULL, PA_NAMEREG_SINK);
 143         data->save_sink = FALSE;
 144     }
 145
 146     pa_return_null_if_fail(data->sink);
 147     pa_return_null_if_fail(pa_sink_get_state(data->sink) != PA_SINK_UNLINKED);
 148     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));
 149
 150     if (!data->sample_spec_is_set)
 151         data->sample_spec = data->sink->sample_spec;
 152
 153     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
 154
 155     if (!data->channel_map_is_set) {
 156         if (pa_channel_map_compatible(&data->sink->channel_map, &data->sample_spec))
 157             data->channel_map = data->sink->channel_map;
 158         else
 159             pa_channel_map_init_extend(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 160     }
 161
 162     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 163     pa_return_null_if_fail(pa_channel_map_compatible(&data->channel_map, &data->sample_spec));
 164
 165     if (!data->virtual_volume_is_set) {
 166
 167         if (data->sink->flags & PA_SINK_FLAT_VOLUME) {
 168             data->virtual_volume = data->sink->virtual_volume;
 169             pa_cvolume_remap(&data->virtual_volume, &data->sink->channel_map, &data->channel_map);
 170         } else
 171             pa_cvolume_reset(&data->virtual_volume, data->sample_spec.channels);
 172
 173         data->save_volume = FALSE;
 174
 175     } else if (!data->virtual_volume_is_absolute) {
 176
 177         /* When the 'absolute' bool is set then we'll treat the volume
 178          * as relative to the sink volume even in flat volume mode */
 179         if (data->sink->flags & PA_SINK_FLAT_VOLUME) {
 180             pa_cvolume t = data->sink->virtual_volume;
 181             pa_cvolume_remap(&t, &data->sink->channel_map, &data->channel_map);
 182             pa_sw_cvolume_multiply(&data->virtual_volume, &data->virtual_volume, &t);
 183         }
 184     }
 185
 186     pa_return_null_if_fail(pa_cvolume_valid(&data->virtual_volume));
 187     pa_return_null_if_fail(pa_cvolume_compatible(&data->virtual_volume, &data->sample_spec));
 188
 189     if (!data->soft_volume_is_set)
 190         data->soft_volume = data->virtual_volume;
 191
 192     pa_return_null_if_fail(pa_cvolume_valid(&data->soft_volume));
 193     pa_return_null_if_fail(pa_cvolume_compatible(&data->soft_volume, &data->sample_spec));
 194
 195     if (!data->muted_is_set)
 196         data->muted = FALSE;
 197
 198     if (flags & PA_SINK_INPUT_FIX_FORMAT)
 199         data->sample_spec.format = data->sink->sample_spec.format;
 200
 201     if (flags & PA_SINK_INPUT_FIX_RATE)
 202         data->sample_spec.rate = data->sink->sample_spec.rate;
 203
 204     original_cm = data->channel_map;
 205
 206     if (flags & PA_SINK_INPUT_FIX_CHANNELS) {
 207         data->sample_spec.channels = data->sink->sample_spec.channels;
 208         data->channel_map = data->sink->channel_map;
 209     }
 210
 211     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 212     pa_assert(pa_channel_map_valid(&data->channel_map));
 213
 214     /* Due to the fixing of the sample spec the volume might not match anymore */
 215     pa_cvolume_remap(&data->soft_volume, &original_cm, &data->channel_map);
 216     pa_cvolume_remap(&data->virtual_volume, &original_cm, &data->channel_map);
 217
 218     if (data->resample_method == PA_RESAMPLER_INVALID)
 219         data->resample_method = core->resample_method;
 220
 221     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 222
 223     if (data->client)
 224         pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->client->proplist);
 225
 226     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_INPUT_FIXATE], data) < 0)
 227         return NULL;
 228
 229     if (pa_idxset_size(data->sink->inputs) >= PA_MAX_INPUTS_PER_SINK) {
 230         pa_log_warn("Failed to create sink input: too many inputs per sink.");
 231         return NULL;
 232     }
 233
 234     if ((flags & PA_SINK_INPUT_VARIABLE_RATE) ||
 235         !pa_sample_spec_equal(&data->sample_spec, &data->sink->sample_spec) ||
 236         !pa_channel_map_equal(&data->channel_map, &data->sink->channel_map)) {
 237
 238         if (!(resampler = pa_resampler_new(
 239                       core->mempool,
 240                       &data->sample_spec, &data->channel_map,
 241                       &data->sink->sample_spec, &data->sink->channel_map,
 242                       data->resample_method,
 243                       ((flags & PA_SINK_INPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 244                       ((flags & PA_SINK_INPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 245                       (core->disable_remixing || (flags & PA_SINK_INPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0) |
 246                       (core->disable_lfe_remixing ? PA_RESAMPLER_NO_LFE : 0)))) {
 247             pa_log_warn("Unsupported resampling operation.");
 248             return NULL;
 249         }
 250     }
 251
 252     i = pa_msgobject_new(pa_sink_input);
 253     i->parent.parent.free = sink_input_free;
 254     i->parent.process_msg = pa_sink_input_process_msg;
 255
 256     i->core = core;
 257     i->state = PA_SINK_INPUT_INIT;
 258     i->flags = flags;
 259     i->proplist = pa_proplist_copy(data->proplist);
 260     i->driver = pa_xstrdup(pa_path_get_filename(data->driver));
 261     i->module = data->module;
 262     i->sink = data->sink;
 263     i->client = data->client;
 264
 265     i->requested_resample_method = data->resample_method;
 266     i->actual_resample_method = resampler ? pa_resampler_get_method(resampler) : PA_RESAMPLER_INVALID;
 267     i->sample_spec = data->sample_spec;
 268     i->channel_map = data->channel_map;
 269
 270     i->virtual_volume = data->virtual_volume;
 271     i->soft_volume = data->soft_volume;
 272     i->save_volume = data->save_volume;
 273     i->save_sink = data->save_sink;
 274     i->save_muted = data->save_muted;
 275
 276     i->muted = data->muted;
 277
 278     if (data->sync_base) {
 279         i->sync_next = data->sync_base->sync_next;
 280         i->sync_prev = data->sync_base;
 281
 282         if (data->sync_base->sync_next)
 283             data->sync_base->sync_next->sync_prev = i;
 284         data->sync_base->sync_next = i;
 285     } else
 286         i->sync_next = i->sync_prev = NULL;
 287
 288     i->direct_outputs = pa_idxset_new(NULL, NULL);
 289
 290     reset_callbacks(i);
 291     i->userdata = NULL;
 292
 293     i->thread_info.state = i->state;
 294     i->thread_info.attached = FALSE;
 295     pa_atomic_store(&i->thread_info.drained, 1);
 296     i->thread_info.sample_spec = i->sample_spec;
 297     i->thread_info.resampler = resampler;
 298     i->thread_info.soft_volume = i->soft_volume;
 299     i->thread_info.muted = i->muted;
 300     i->thread_info.requested_sink_latency = (pa_usec_t) -1;
 301     i->thread_info.rewrite_nbytes = 0;
 302     i->thread_info.rewrite_flush = FALSE;
 303     i->thread_info.dont_rewind_render = FALSE;
 304     i->thread_info.underrun_for = (uint64_t) -1;
 305     i->thread_info.playing_for = 0;
 306     i->thread_info.direct_outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 307
 308     i->thread_info.render_memblockq = pa_memblockq_new(
 309             0,
 310             MEMBLOCKQ_MAXLENGTH,
 311             0,
 312             pa_frame_size(&i->sink->sample_spec),
 313             0,
 314             1,
 315             0,
 316             &i->sink->silence);
 317
 318     pa_assert_se(pa_idxset_put(core->sink_inputs, pa_sink_input_ref(i), &i->index) == 0);
 319     pa_assert_se(pa_idxset_put(i->sink->inputs, i, NULL) == 0);
 320
 321     if (i->client)
 322         pa_assert_se(pa_idxset_put(i->client->sink_inputs, i, NULL) >= 0);
 323
 324     pa_log_info("Created input %u \"%s\" on %s with sample spec %s and channel map %s",
 325                 i->index,
 326                 pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME)),
 327                 i->sink->name,
 328                 pa_sample_spec_snprint(st, sizeof(st), &i->sample_spec),
 329                 pa_channel_map_snprint(cm, sizeof(cm), &i->channel_map));
 330
 331     /* Don't forget to call pa_sink_input_put! */
 332
 333     return i;
 334 }
 335
 336 /* Called from main context */
 337 static void update_n_corked(pa_sink_input *i, pa_sink_input_state_t state) {
 338     pa_assert(i);
 339
 340     if (!i->sink)
 341         return;
 342
 343     if (i->state == PA_SINK_INPUT_CORKED && state != PA_SINK_INPUT_CORKED)
 344         pa_assert_se(i->sink->n_corked -- >= 1);
 345     else if (i->state != PA_SINK_INPUT_CORKED && state == PA_SINK_INPUT_CORKED)
 346         i->sink->n_corked++;
 347 }
 348
 349 /* Called from main context */
 350 static int sink_input_set_state(pa_sink_input *i, pa_sink_input_state_t state) {
 351     pa_sink_input *ssync;
 352     pa_assert(i);
 353
 354     if (state == PA_SINK_INPUT_DRAINED)
 355         state = PA_SINK_INPUT_RUNNING;
 356
 357     if (i->state == state)
 358         return 0;
 359
 360     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);
 361
 362     update_n_corked(i, state);
 363     i->state = state;
 364
 365     for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev) {
 366         update_n_corked(ssync, state);
 367         ssync->state = state;
 368     }
 369     for (ssync = i->sync_next; ssync; ssync = ssync->sync_next) {
 370         update_n_corked(ssync, state);
 371         ssync->state = state;
 372     }
 373
 374     if (state != PA_SINK_INPUT_UNLINKED) {
 375         pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], i);
 376
 377         for (ssync = i->sync_prev; ssync; ssync = ssync->sync_prev)
 378             pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 379
 380         for (ssync = i->sync_next; ssync; ssync = ssync->sync_next)
 381             pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED], ssync);
 382     }
 383
 384     pa_sink_update_status(i->sink);
 385
 386     return 0;
 387 }
 388
 389 /* Called from main context */
 390 void pa_sink_input_unlink(pa_sink_input *i) {
 391     pa_bool_t linked;
 392     pa_source_output *o, *p =  NULL;
 393     pa_assert(i);
 394
 395     /* See pa_sink_unlink() for a couple of comments how this function
 396      * works */
 397
 398     pa_sink_input_ref(i);
 399
 400     linked = PA_SINK_INPUT_IS_LINKED(i->state);
 401
 402     if (linked)
 403         pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], i);
 404
 405     if (i->sync_prev)
 406         i->sync_prev->sync_next = i->sync_next;
 407     if (i->sync_next)
 408         i->sync_next->sync_prev = i->sync_prev;
 409
 410     i->sync_prev = i->sync_next = NULL;
 411
 412     pa_idxset_remove_by_data(i->core->sink_inputs, i, NULL);
 413
 414     if (i->sink)
 415         if (pa_idxset_remove_by_data(i->sink->inputs, i, NULL))
 416             pa_sink_input_unref(i);
 417
 418     if (i->client)
 419         pa_idxset_remove_by_data(i->client->sink_inputs, i, NULL);
 420
 421     while ((o = pa_idxset_first(i->direct_outputs, NULL))) {
 422         pa_assert(o != p);
 423         pa_source_output_kill(o);
 424         p = o;
 425     }
 426
 427     update_n_corked(i, PA_SINK_INPUT_UNLINKED);
 428     i->state = PA_SINK_INPUT_UNLINKED;
 429
 430     if (linked && i->sink) {
 431         /* We might need to update the sink's volume if we are in flat volume mode. */
 432         if (i->sink->flags & PA_SINK_FLAT_VOLUME) {
 433             pa_cvolume new_volume;
 434             pa_sink_update_flat_volume(i->sink, &new_volume);
 435             pa_sink_set_volume(i->sink, &new_volume, FALSE, FALSE);
 436         }
 437
 438         if (i->sink->asyncmsgq)
 439             pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_REMOVE_INPUT, i, 0, NULL) == 0);
 440     }
 441
 442     reset_callbacks(i);
 443
 444     if (linked) {
 445         pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_REMOVE, i->index);
 446         pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK_POST], i);
 447     }
 448
 449     if (i->sink) {
 450         pa_sink_update_status(i->sink);
 451         i->sink = NULL;
 452     }
 453
 454     pa_sink_input_unref(i);
 455 }
 456
 457 /* Called from main context */
 458 static void sink_input_free(pa_object *o) {
 459     pa_sink_input* i = PA_SINK_INPUT(o);
 460
 461     pa_assert(i);
 462     pa_assert(pa_sink_input_refcnt(i) == 0);
 463
 464     if (PA_SINK_INPUT_IS_LINKED(i->state))
 465         pa_sink_input_unlink(i);
 466
 467     pa_log_info("Freeing input %u \"%s\"", i->index, pa_strnull(pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME)));
 468
 469     pa_assert(!i->thread_info.attached);
 470
 471     if (i->thread_info.render_memblockq)
 472         pa_memblockq_free(i->thread_info.render_memblockq);
 473
 474     if (i->thread_info.resampler)
 475         pa_resampler_free(i->thread_info.resampler);
 476
 477     if (i->proplist)
 478         pa_proplist_free(i->proplist);
 479
 480     if (i->direct_outputs)
 481         pa_idxset_free(i->direct_outputs, NULL, NULL);
 482
 483     if (i->thread_info.direct_outputs)
 484         pa_hashmap_free(i->thread_info.direct_outputs, NULL, NULL);
 485
 486     pa_xfree(i->driver);
 487     pa_xfree(i);
 488 }
 489
 490 /* Called from main context */
 491 void pa_sink_input_put(pa_sink_input *i) {
 492     pa_sink_input_state_t state;
 493     pa_sink_input_assert_ref(i);
 494
 495     pa_assert(i->state == PA_SINK_INPUT_INIT);
 496
 497     /* The following fields must be initialized properly */
 498     pa_assert(i->pop);
 499     pa_assert(i->process_rewind);
 500     pa_assert(i->kill);
 501
 502     i->thread_info.soft_volume = i->soft_volume;
 503     i->thread_info.muted = i->muted;
 504
 505     state = i->flags & PA_SINK_INPUT_START_CORKED ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING;
 506
 507     update_n_corked(i, state);
 508     i->state = state;
 509
 510     /* We might need to update the sink's volume if we are in flat volume mode. */
 511     if (i->sink->flags & PA_SINK_FLAT_VOLUME) {
 512         pa_cvolume new_volume;
 513         pa_sink_update_flat_volume(i->sink, &new_volume);
 514         pa_sink_set_volume(i->sink, &new_volume, FALSE, FALSE);
 515     }
 516
 517     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_ADD_INPUT, i, 0, NULL) == 0);
 518
 519     pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, i->index);
 520     pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], i);
 521
 522     pa_sink_update_status(i->sink);
 523 }
 524
 525 /* Called from main context */
 526 void pa_sink_input_kill(pa_sink_input*i) {
 527     pa_sink_input_assert_ref(i);
 528     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 529
 530     i->kill(i);
 531 }
 532
 533 /* Called from main context */
 534 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency) {
 535     pa_usec_t r[2] = { 0, 0 };
 536
 537     pa_sink_input_assert_ref(i);
 538     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 539
 540     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_LATENCY, r, 0, NULL) == 0);
 541
 542     if (i->get_latency)
 543         r[0] += i->get_latency(i);
 544
 545     if (sink_latency)
 546         *sink_latency = r[1];
 547
 548     return r[0];
 549 }
 550
 551 /* Called from thread context */
 552 int pa_sink_input_peek(pa_sink_input *i, size_t slength /* in sink frames */, pa_memchunk *chunk, pa_cvolume *volume) {
 553     pa_bool_t do_volume_adj_here;
 554     pa_bool_t volume_is_norm;
 555     size_t block_size_max_sink, block_size_max_sink_input;
 556     size_t ilength;
 557
 558     pa_sink_input_assert_ref(i);
 559     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 560     pa_assert(pa_frame_aligned(slength, &i->sink->sample_spec));
 561     pa_assert(chunk);
 562     pa_assert(volume);
 563
 564 /*     pa_log_debug("peek"); */
 565
 566     if (!i->pop)
 567         return -1;
 568
 569     pa_assert(i->thread_info.state == PA_SINK_INPUT_RUNNING ||
 570               i->thread_info.state == PA_SINK_INPUT_CORKED ||
 571               i->thread_info.state == PA_SINK_INPUT_DRAINED);
 572
 573     block_size_max_sink_input = i->thread_info.resampler ?
 574         pa_resampler_max_block_size(i->thread_info.resampler) :
 575         pa_frame_align(pa_mempool_block_size_max(i->core->mempool), &i->sample_spec);
 576
 577     block_size_max_sink = pa_frame_align(pa_mempool_block_size_max(i->core->mempool), &i->sink->sample_spec);
 578
 579     /* Default buffer size */
 580     if (slength <= 0)
 581         slength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sink->sample_spec);
 582
 583     if (slength > block_size_max_sink)
 584         slength = block_size_max_sink;
 585
 586     if (i->thread_info.resampler) {
 587         ilength = pa_resampler_request(i->thread_info.resampler, slength);
 588
 589         if (ilength <= 0)
 590             ilength = pa_frame_align(CONVERT_BUFFER_LENGTH, &i->sample_spec);
 591     } else
 592         ilength = slength;
 593
 594     if (ilength > block_size_max_sink_input)
 595         ilength = block_size_max_sink_input;
 596
 597     /* If the channel maps of the sink and this stream differ, we need
 598      * to adjust the volume *before* we resample. Otherwise we can do
 599      * it after and leave it for the sink code */
 600
 601     do_volume_adj_here = !pa_channel_map_equal(&i->channel_map, &i->sink->channel_map);
 602     volume_is_norm = pa_cvolume_is_norm(&i->thread_info.soft_volume) && !i->thread_info.muted;
 603
 604     while (!pa_memblockq_is_readable(i->thread_info.render_memblockq)) {
 605         pa_memchunk tchunk;
 606
 607         /* There's nothing in our render queue. We need to fill it up
 608          * with data from the implementor. */
 609
 610         if (i->thread_info.state == PA_SINK_INPUT_CORKED ||
 611             i->pop(i, ilength, &tchunk) < 0) {
 612
 613             /* OK, we're corked or the implementor didn't give us any
 614              * data, so let's just hand out silence */
 615             pa_atomic_store(&i->thread_info.drained, 1);
 616
 617             pa_memblockq_seek(i->thread_info.render_memblockq, (int64_t) slength, PA_SEEK_RELATIVE);
 618             i->thread_info.playing_for = 0;
 619             if (i->thread_info.underrun_for != (uint64_t) -1)
 620                 i->thread_info.underrun_for += ilength;
 621             break;
 622         }
 623
 624         pa_atomic_store(&i->thread_info.drained, 0);
 625
 626         pa_assert(tchunk.length > 0);
 627         pa_assert(tchunk.memblock);
 628
 629         i->thread_info.underrun_for = 0;
 630         i->thread_info.playing_for += tchunk.length;
 631
 632         while (tchunk.length > 0) {
 633             pa_memchunk wchunk;
 634
 635             wchunk = tchunk;
 636             pa_memblock_ref(wchunk.memblock);
 637
 638             if (wchunk.length > block_size_max_sink_input)
 639                 wchunk.length = block_size_max_sink_input;
 640
 641             /* It might be necessary to adjust the volume here */
 642             if (do_volume_adj_here && !volume_is_norm) {
 643                 pa_memchunk_make_writable(&wchunk, 0);
 644
 645                 if (i->thread_info.muted)
 646                     pa_silence_memchunk(&wchunk, &i->thread_info.sample_spec);
 647                 else
 648                     pa_volume_memchunk(&wchunk, &i->thread_info.sample_spec, &i->thread_info.soft_volume);
 649             }
 650
 651             if (!i->thread_info.resampler)
 652                 pa_memblockq_push_align(i->thread_info.render_memblockq, &wchunk);
 653             else {
 654                 pa_memchunk rchunk;
 655                 pa_resampler_run(i->thread_info.resampler, &wchunk, &rchunk);
 656
 657 /*                 pa_log_debug("pushing %lu", (unsigned long) rchunk.length); */
 658
 659                 if (rchunk.memblock) {
 660                     pa_memblockq_push_align(i->thread_info.render_memblockq, &rchunk);
 661                     pa_memblock_unref(rchunk.memblock);
 662                 }
 663             }
 664
 665             pa_memblock_unref(wchunk.memblock);
 666
 667             tchunk.index += wchunk.length;
 668             tchunk.length -= wchunk.length;
 669         }
 670
 671         pa_memblock_unref(tchunk.memblock);
 672     }
 673
 674     pa_assert_se(pa_memblockq_peek(i->thread_info.render_memblockq, chunk) >= 0);
 675
 676     pa_assert(chunk->length > 0);
 677     pa_assert(chunk->memblock);
 678
 679 /*     pa_log_debug("peeking %lu", (unsigned long) chunk->length); */
 680
 681     if (chunk->length > block_size_max_sink)
 682         chunk->length = block_size_max_sink;
 683
 684     /* Let's see if we had to apply the volume adjustment ourselves,
 685      * or if this can be done by the sink for us */
 686
 687     if (do_volume_adj_here)
 688         /* We had different channel maps, so we already did the adjustment */
 689         pa_cvolume_reset(volume, i->sink->sample_spec.channels);
 690     else if (i->thread_info.muted)
 691         /* We've both the same channel map, so let's have the sink do the adjustment for us*/
 692         pa_cvolume_mute(volume, i->sink->sample_spec.channels);
 693     else
 694         *volume = i->thread_info.soft_volume;
 695
 696     return 0;
 697 }
 698
 699 /* Called from thread context */
 700 void pa_sink_input_drop(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 701     pa_sink_input_assert_ref(i);
 702
 703     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 704     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 705     pa_assert(nbytes > 0);
 706
 707 /*     pa_log_debug("dropping %lu", (unsigned long) nbytes); */
 708
 709     pa_memblockq_drop(i->thread_info.render_memblockq, nbytes);
 710 }
 711
 712 /* Called from thread context */
 713 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in sink sample spec */) {
 714     size_t lbq;
 715     pa_bool_t called = FALSE;
 716     pa_sink_input_assert_ref(i);
 717
 718     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 719     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 720
 721 /*     pa_log_debug("rewind(%lu, %lu)", (unsigned long) nbytes, (unsigned long) i->thread_info.rewrite_nbytes); */
 722
 723     lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
 724
 725     if (nbytes > 0 && !i->thread_info.dont_rewind_render) {
 726         pa_log_debug("Have to rewind %lu bytes on render memblockq.", (unsigned long) nbytes);
 727         pa_memblockq_rewind(i->thread_info.render_memblockq, nbytes);
 728     }
 729
 730     if (i->thread_info.rewrite_nbytes == (size_t) -1) {
 731
 732         /* We were asked to drop all buffered data, and rerequest new
 733          * data from implementor the next time push() is called */
 734
 735         pa_memblockq_flush_write(i->thread_info.render_memblockq);
 736
 737     } else if (i->thread_info.rewrite_nbytes > 0) {
 738         size_t max_rewrite, amount;
 739
 740         /* Calculate how much make sense to rewrite at most */
 741         max_rewrite = nbytes + lbq;
 742
 743         /* Transform into local domain */
 744         if (i->thread_info.resampler)
 745             max_rewrite = pa_resampler_request(i->thread_info.resampler, max_rewrite);
 746
 747         /* Calculate how much of the rewinded data should actually be rewritten */
 748         amount = PA_MIN(i->thread_info.rewrite_nbytes, max_rewrite);
 749
 750         if (amount > 0) {
 751             pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) amount);
 752
 753             /* Tell the implementor */
 754             if (i->process_rewind)
 755                 i->process_rewind(i, amount);
 756             called = TRUE;
 757
 758             /* Convert back to to sink domain */
 759             if (i->thread_info.resampler)
 760                 amount = pa_resampler_result(i->thread_info.resampler, amount);
 761
 762             if (amount > 0)
 763                 /* Ok, now update the write pointer */
 764                 pa_memblockq_seek(i->thread_info.render_memblockq, - ((int64_t) amount), PA_SEEK_RELATIVE);
 765
 766             if (i->thread_info.rewrite_flush)
 767                 pa_memblockq_silence(i->thread_info.render_memblockq);
 768
 769             /* And reset the resampler */
 770             if (i->thread_info.resampler)
 771                 pa_resampler_reset(i->thread_info.resampler);
 772         }
 773     }
 774
 775     if (!called)
 776         if (i->process_rewind)
 777             i->process_rewind(i, 0);
 778
 779     i->thread_info.rewrite_nbytes = 0;
 780     i->thread_info.rewrite_flush = FALSE;
 781     i->thread_info.dont_rewind_render = FALSE;
 782 }
 783
 784 /* Called from thread context */
 785 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 786     pa_sink_input_assert_ref(i);
 787     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 788     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 789
 790     pa_memblockq_set_maxrewind(i->thread_info.render_memblockq, nbytes);
 791
 792     if (i->update_max_rewind)
 793         i->update_max_rewind(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 794 }
 795
 796 /* Called from thread context */
 797 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */) {
 798     pa_sink_input_assert_ref(i);
 799     pa_assert(PA_SINK_INPUT_IS_LINKED(i->thread_info.state));
 800     pa_assert(pa_frame_aligned(nbytes, &i->sink->sample_spec));
 801
 802     if (i->update_max_request)
 803         i->update_max_request(i, i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, nbytes) : nbytes);
 804 }
 805
 806 /* Called from thread context */
 807 static pa_usec_t fixup_latency(pa_sink *s, pa_usec_t usec) {
 808     pa_sink_assert_ref(s);
 809
 810     if (usec == (pa_usec_t) -1)
 811         return usec;
 812
 813     if (s->thread_info.max_latency > 0 && usec > s->thread_info.max_latency)
 814         usec = s->thread_info.max_latency;
 815
 816     if (s->thread_info.min_latency > 0 && usec < s->thread_info.min_latency)
 817         usec = s->thread_info.min_latency;
 818
 819     return usec;
 820 }
 821
 822 /* Called from thread context */
 823 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec) {
 824     pa_sink_input_assert_ref(i);
 825
 826     usec = fixup_latency(i->sink, usec);
 827     i->thread_info.requested_sink_latency = usec;
 828     pa_sink_invalidate_requested_latency(i->sink);
 829
 830     return usec;
 831 }
 832
 833 /* Called from main context */
 834 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec) {
 835     pa_sink_input_assert_ref(i);
 836
 837     if (PA_SINK_INPUT_IS_LINKED(i->state))
 838         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 839     else
 840         /* If this sink input is not realized yet, we have to touch
 841          * the thread info data directly */
 842
 843         i->thread_info.requested_sink_latency = usec;
 844
 845     return usec;
 846 }
 847
 848 /* Called from main context */
 849 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i) {
 850     pa_usec_t usec = 0;
 851
 852     pa_sink_input_assert_ref(i);
 853
 854     if (PA_SINK_INPUT_IS_LINKED(i->state))
 855         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
 856     else
 857         /* If this sink input is not realized yet, we have to touch
 858          * the thread info data directly */
 859         usec = i->thread_info.requested_sink_latency;
 860
 861     return usec;
 862 }
 863
 864 /* Called from main context */
 865 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, pa_bool_t save) {
 866     pa_sink_input_assert_ref(i);
 867     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 868     pa_assert(volume);
 869     pa_assert(pa_cvolume_valid(volume));
 870     pa_assert(pa_cvolume_compatible(volume, &i->sample_spec));
 871
 872     if (pa_cvolume_equal(volume, &i->virtual_volume))
 873         return;
 874
 875     i->virtual_volume = *volume;
 876     i->save_volume = save;
 877
 878     if (i->sink->flags & PA_SINK_FLAT_VOLUME) {
 879         pa_cvolume new_volume;
 880
 881         /* We are in flat volume mode, so let's update all sink input
 882          * volumes and update the flat volume of the sink */
 883
 884         pa_sink_update_flat_volume(i->sink, &new_volume);
 885         pa_sink_set_volume(i->sink, &new_volume, FALSE, TRUE);
 886
 887     } else {
 888
 889         /* OK, we are in normal volume mode. The volume only affects
 890          * ourselves */
 891
 892         i->soft_volume = *volume;
 893
 894         /* Hooks have the ability to play games with i->soft_volume */
 895         pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_SET_VOLUME], i);
 896
 897         pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_SOFT_VOLUME, NULL, 0, NULL) == 0);
 898     }
 899
 900     /* The virtual volume changed, let's tell people so */
 901     pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 902 }
 903
 904 /* Called from main context */
 905 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i) {
 906     pa_sink_input_assert_ref(i);
 907     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 908
 909     return &i->virtual_volume;
 910 }
 911
 912 /* Called from main context */
 913 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute, pa_bool_t save) {
 914     pa_assert(i);
 915     pa_sink_input_assert_ref(i);
 916     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 917
 918     if (!i->muted == !mute)
 919         return;
 920
 921     i->muted = mute;
 922     i->save_muted = save;
 923
 924     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_SOFT_MUTE, NULL, 0, NULL) == 0);
 925     pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 926 }
 927
 928 /* Called from main context */
 929 pa_bool_t pa_sink_input_get_mute(pa_sink_input *i) {
 930     pa_sink_input_assert_ref(i);
 931     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 932
 933     return i->muted;
 934 }
 935
 936 /* Called from main thread */
 937 pa_bool_t pa_sink_input_update_proplist(pa_sink_input *i, pa_update_mode_t mode, pa_proplist *p) {
 938
 939   pa_sink_input_assert_ref(i);
 940
 941   pa_proplist_update(i->proplist, mode, p);
 942
 943   if (PA_SINK_IS_LINKED(i->state)) {
 944       pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], i);
 945       pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 946   }
 947
 948   return TRUE;
 949 }
 950
 951 /* Called from main context */
 952 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b) {
 953     pa_sink_input_assert_ref(i);
 954     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 955
 956     sink_input_set_state(i, b ? PA_SINK_INPUT_CORKED : PA_SINK_INPUT_RUNNING);
 957 }
 958
 959 /* Called from main context */
 960 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate) {
 961     pa_sink_input_assert_ref(i);
 962     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
 963     pa_return_val_if_fail(i->thread_info.resampler, -1);
 964
 965     if (i->sample_spec.rate == rate)
 966         return 0;
 967
 968     i->sample_spec.rate = rate;
 969
 970     pa_asyncmsgq_post(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 971
 972     pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 973     return 0;
 974 }
 975
 976 /* Called from main context */
 977 void pa_sink_input_set_name(pa_sink_input *i, const char *name) {
 978     const char *old;
 979     pa_sink_input_assert_ref(i);
 980
 981     if (!name && !pa_proplist_contains(i->proplist, PA_PROP_MEDIA_NAME))
 982         return;
 983
 984     old = pa_proplist_gets(i->proplist, PA_PROP_MEDIA_NAME);
 985
 986     if (old && name && !strcmp(old, name))
 987         return;
 988
 989     if (name)
 990         pa_proplist_sets(i->proplist, PA_PROP_MEDIA_NAME, name);
 991     else
 992         pa_proplist_unset(i->proplist, PA_PROP_MEDIA_NAME);
 993
 994     if (PA_SINK_INPUT_IS_LINKED(i->state)) {
 995         pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], i);
 996         pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
 997     }
 998 }
 999
1000 /* Called from main context */
1001 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i) {
1002     pa_sink_input_assert_ref(i);
1003
1004     return i->actual_resample_method;
1005 }
1006
1007 /* Called from main context */
1008 pa_bool_t pa_sink_input_may_move(pa_sink_input *i) {
1009     pa_sink_input_assert_ref(i);
1010     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
1011
1012     if (i->flags & PA_SINK_INPUT_DONT_MOVE)
1013         return FALSE;
1014
1015     if (i->sync_next || i->sync_prev) {
1016         pa_log_warn("Moving synchronised streams not supported.");
1017         return FALSE;
1018     }
1019
1020     return TRUE;
1021 }
1022
1023 /* Called from main context */
1024 pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest) {
1025     pa_sink_input_assert_ref(i);
1026     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
1027     pa_sink_assert_ref(dest);
1028
1029     if (dest == i->sink)
1030         return TRUE;
1031
1032     if (!pa_sink_input_may_move(i))
1033         return FALSE;
1034
1035     if (pa_idxset_size(dest->inputs) >= PA_MAX_INPUTS_PER_SINK) {
1036         pa_log_warn("Failed to move sink input: too many inputs per sink.");
1037         return FALSE;
1038     }
1039
1040     if (i->may_move_to)
1041         if (!i->may_move_to(i, dest))
1042             return FALSE;
1043
1044     return TRUE;
1045 }
1046
1047 /* Called from main context */
1048 int pa_sink_input_start_move(pa_sink_input *i) {
1049     pa_source_output *o, *p = NULL;
1050     pa_sink *origin;
1051
1052     pa_sink_input_assert_ref(i);
1053     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
1054     pa_assert(i->sink);
1055
1056     if (!pa_sink_input_may_move(i))
1057         return -1;
1058
1059     if (pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_START], i) < 0)
1060         return -1;
1061
1062     origin = i->sink;
1063
1064     /* Kill directly connected outputs */
1065     while ((o = pa_idxset_first(i->direct_outputs, NULL))) {
1066         pa_assert(o != p);
1067         pa_source_output_kill(o);
1068         p = o;
1069     }
1070     pa_assert(pa_idxset_isempty(i->direct_outputs));
1071
1072     pa_idxset_remove_by_data(i->sink->inputs, i, NULL);
1073
1074     if (pa_sink_input_get_state(i) == PA_SINK_INPUT_CORKED)
1075         pa_assert_se(i->sink->n_corked-- >= 1);
1076
1077     /* We might need to update the sink's volume if we are in flat volume mode. */
1078     if (i->sink->flags & PA_SINK_FLAT_VOLUME) {
1079         pa_cvolume new_volume;
1080         pa_sink_update_flat_volume(i->sink, &new_volume);
1081         pa_sink_set_volume(i->sink, &new_volume, FALSE, FALSE);
1082     }
1083
1084     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_START_MOVE, i, 0, NULL) == 0);
1085
1086     pa_sink_update_status(i->sink);
1087     i->sink = NULL;
1088
1089     return 0;
1090 }
1091
1092 /* Called from main context */
1093 int pa_sink_input_finish_move(pa_sink_input *i, pa_sink *dest, pa_bool_t save) {
1094     pa_resampler *new_resampler;
1095
1096     pa_sink_input_assert_ref(i);
1097     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
1098     pa_assert(!i->sink);
1099     pa_sink_assert_ref(dest);
1100
1101     if (!pa_sink_input_may_move_to(i, dest))
1102         return -1;
1103
1104     i->sink = dest;
1105     i->save_sink = save;
1106     pa_idxset_put(dest->inputs, i, NULL);
1107
1108     if (pa_sink_input_get_state(i) == PA_SINK_INPUT_CORKED)
1109         i->sink->n_corked++;
1110
1111     if (i->thread_info.resampler &&
1112         pa_sample_spec_equal(pa_resampler_output_sample_spec(i->thread_info.resampler), &dest->sample_spec) &&
1113         pa_channel_map_equal(pa_resampler_output_channel_map(i->thread_info.resampler), &dest->channel_map))
1114
1115         /* Try to reuse the old resampler if possible */
1116         new_resampler = i->thread_info.resampler;
1117
1118     else if ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ||
1119              !pa_sample_spec_equal(&i->sample_spec, &dest->sample_spec) ||
1120              !pa_channel_map_equal(&i->channel_map, &dest->channel_map)) {
1121
1122         /* Okey, we need a new resampler for the new sink */
1123
1124         if (!(new_resampler = pa_resampler_new(
1125                       i->core->mempool,
1126                       &i->sample_spec, &i->channel_map,
1127                       &dest->sample_spec, &dest->channel_map,
1128                       i->requested_resample_method,
1129                       ((i->flags & PA_SINK_INPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
1130                       ((i->flags & PA_SINK_INPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
1131                       (i->core->disable_remixing || (i->flags & PA_SINK_INPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
1132             pa_log_warn("Unsupported resampling operation.");
1133             return -1;
1134         }
1135     } else
1136         new_resampler = NULL;
1137
1138     /* Replace resampler and render queue */
1139     if (new_resampler != i->thread_info.resampler) {
1140
1141         if (i->thread_info.resampler)
1142             pa_resampler_free(i->thread_info.resampler);
1143         i->thread_info.resampler = new_resampler;
1144
1145         pa_memblockq_free(i->thread_info.render_memblockq);
1146
1147         i->thread_info.render_memblockq = pa_memblockq_new(
1148                 0,
1149                 MEMBLOCKQ_MAXLENGTH,
1150                 0,
1151                 pa_frame_size(&i->sink->sample_spec),
1152                 0,
1153                 1,
1154                 0,
1155                 &i->sink->silence);
1156     }
1157
1158     pa_sink_update_status(dest);
1159
1160     /* We might need to update the sink's volume if we are in flat volume mode. */
1161     if (i->sink->flags & PA_SINK_FLAT_VOLUME) {
1162         pa_cvolume new_volume;
1163         pa_sink_update_flat_volume(i->sink, &new_volume);
1164         pa_sink_set_volume(i->sink, &new_volume, FALSE, FALSE);
1165     }
1166
1167     pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_FINISH_MOVE, i, 0, NULL) == 0);
1168
1169     pa_log_debug("Successfully moved sink input %i to %s.", i->index, dest->name);
1170
1171     /* Notify everyone */
1172     if (i->moved)
1173         i->moved(i);
1174
1175     pa_hook_fire(&i->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_FINISH], i);
1176     pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
1177
1178     return 0;
1179 }
1180
1181 /* Called from main context */
1182 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, pa_bool_t save) {
1183     pa_sink_input_assert_ref(i);
1184     pa_assert(PA_SINK_INPUT_IS_LINKED(i->state));
1185     pa_assert(i->sink);
1186     pa_sink_assert_ref(dest);
1187
1188     if (dest == i->sink)
1189         return 0;
1190
1191     if (!pa_sink_input_may_move_to(i, dest))
1192         return -1;
1193
1194     if (pa_sink_input_start_move(i) < 0)
1195         return -1;
1196
1197     if (pa_sink_input_finish_move(i, dest, save) < 0)
1198         return -1;
1199
1200     return 0;
1201 }
1202
1203 /* Called from IO thread context */
1204 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state) {
1205     pa_bool_t corking, uncorking;
1206     pa_sink_input_assert_ref(i);
1207
1208     if (state == i->thread_info.state)
1209         return;
1210
1211     if ((state == PA_SINK_INPUT_DRAINED || state == PA_SINK_INPUT_RUNNING) &&
1212         !(i->thread_info.state == PA_SINK_INPUT_DRAINED || i->thread_info.state != PA_SINK_INPUT_RUNNING))
1213         pa_atomic_store(&i->thread_info.drained, 1);
1214
1215     corking = state == PA_SINK_INPUT_CORKED && i->thread_info.state == PA_SINK_INPUT_RUNNING;
1216     uncorking = i->thread_info.state == PA_SINK_INPUT_CORKED && state == PA_SINK_INPUT_RUNNING;
1217
1218     if (i->state_change)
1219         i->state_change(i, state);
1220
1221     i->thread_info.state = state;
1222
1223     if (corking) {
1224
1225         pa_log_debug("Requesting rewind due to corking");
1226
1227         /* This will tell the implementing sink input driver to rewind
1228          * so that the unplayed already mixed data is not lost */
1229         pa_sink_input_request_rewind(i, 0, TRUE, TRUE, FALSE);
1230
1231     } else if (uncorking) {
1232
1233         i->thread_info.underrun_for = (uint64_t) -1;
1234         i->thread_info.playing_for = 0;
1235
1236         pa_log_debug("Requesting rewind due to uncorking");
1237
1238         /* OK, we're being uncorked. Make sure we're not rewound when
1239          * the hw buffer is remixed and request a remix. */
1240         pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
1241     }
1242 }
1243
1244 /* Called from thread context, except when it is not. */
1245 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
1246     pa_sink_input *i = PA_SINK_INPUT(o);
1247     pa_sink_input_assert_ref(i);
1248
1249     switch (code) {
1250
1251         case PA_SINK_INPUT_MESSAGE_SET_SOFT_VOLUME:
1252             if (!pa_cvolume_equal(&i->thread_info.soft_volume, &i->soft_volume)) {
1253                 i->thread_info.soft_volume = i->soft_volume;
1254                 pa_sink_input_request_rewind(i, 0, TRUE, FALSE, FALSE);
1255             }
1256             return 0;
1257
1258         case PA_SINK_INPUT_MESSAGE_SET_SOFT_MUTE:
1259             if (i->thread_info.muted != i->muted) {
1260                 i->thread_info.muted = i->muted;
1261                 pa_sink_input_request_rewind(i, 0, TRUE, FALSE, FALSE);
1262             }
1263             return 0;
1264
1265         case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
1266             pa_usec_t *r = userdata;
1267             pa_usec_t sink_usec = 0;
1268
1269             r[0] += pa_bytes_to_usec(pa_memblockq_get_length(i->thread_info.render_memblockq), &i->sink->sample_spec);
1270
1271             if (i->sink->parent.process_msg(PA_MSGOBJECT(i->sink), PA_SINK_MESSAGE_GET_LATENCY, &sink_usec, 0, NULL) >= 0)
1272                 r[1] += sink_usec;
1273
1274             return 0;
1275         }
1276
1277         case PA_SINK_INPUT_MESSAGE_SET_RATE:
1278
1279             i->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
1280             pa_resampler_set_input_rate(i->thread_info.resampler, PA_PTR_TO_UINT(userdata));
1281
1282             return 0;
1283
1284         case PA_SINK_INPUT_MESSAGE_SET_STATE: {
1285             pa_sink_input *ssync;
1286
1287             pa_sink_input_set_state_within_thread(i, PA_PTR_TO_UINT(userdata));
1288
1289             for (ssync = i->thread_info.sync_prev; ssync; ssync = ssync->thread_info.sync_prev)
1290                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1291
1292             for (ssync = i->thread_info.sync_next; ssync; ssync = ssync->thread_info.sync_next)
1293                 pa_sink_input_set_state_within_thread(ssync, PA_PTR_TO_UINT(userdata));
1294
1295             return 0;
1296         }
1297
1298         case PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY: {
1299             pa_usec_t *usec = userdata;
1300
1301             *usec = pa_sink_input_set_requested_latency_within_thread(i, *usec);
1302             return 0;
1303         }
1304
1305         case PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY: {
1306             pa_usec_t *r = userdata;
1307
1308             *r = i->thread_info.requested_sink_latency;
1309             return 0;
1310         }
1311     }
1312
1313     return -1;
1314 }
1315
1316 /* Called from main thread */
1317 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i) {
1318     pa_sink_input_assert_ref(i);
1319
1320     if (i->state == PA_SINK_INPUT_RUNNING || i->state == PA_SINK_INPUT_DRAINED)
1321         return pa_atomic_load(&i->thread_info.drained) ? PA_SINK_INPUT_DRAINED : PA_SINK_INPUT_RUNNING;
1322
1323     return i->state;
1324 }
1325
1326 /* Called from IO context */
1327 pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i) {
1328     pa_sink_input_assert_ref(i);
1329
1330     if (PA_SINK_INPUT_IS_LINKED(i->thread_info.state))
1331         return pa_memblockq_is_empty(i->thread_info.render_memblockq);
1332
1333     return TRUE;
1334 }
1335
1336 /* Called from IO context */
1337 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) {
1338     size_t lbq;
1339
1340     /* If 'rewrite' is TRUE the sink is rewound as far as requested
1341      * and possible and the exact value of this is passed back the
1342      * implementor via process_rewind(). If 'flush' is also TRUE all
1343      * already rendered data is also dropped.
1344      *
1345      * If 'rewrite' is FALSE the sink is rewound as far as requested
1346      * and possible and the already rendered data is dropped so that
1347      * in the next iteration we read new data from the
1348      * implementor. This implies 'flush' is TRUE.  If
1349      * dont_rewind_render is TRUE then the render memblockq is not
1350      * rewound. */
1351
1352     pa_sink_input_assert_ref(i);
1353
1354     nbytes = PA_MAX(i->thread_info.rewrite_nbytes, nbytes);
1355
1356 /*     pa_log_debug("request rewrite %lu", (unsigned long) nbytes); */
1357
1358     /* We don't take rewind requests while we are corked */
1359     if (i->thread_info.state == PA_SINK_INPUT_CORKED)
1360         return;
1361
1362     pa_assert(rewrite || flush);
1363     pa_assert(!dont_rewind_render || !rewrite);
1364
1365     /* Calculate how much we can rewind locally without having to
1366      * touch the sink */
1367     if (rewrite)
1368         lbq = pa_memblockq_get_length(i->thread_info.render_memblockq);
1369     else
1370         lbq = 0;
1371
1372     /* Check if rewinding for the maximum is requested, and if so, fix up */
1373     if (nbytes <= 0) {
1374
1375         /* Calculate maximum number of bytes that could be rewound in theory */
1376         nbytes = i->sink->thread_info.max_rewind + lbq;
1377
1378         /* Transform from sink domain */
1379         if (i->thread_info.resampler)
1380             nbytes = pa_resampler_request(i->thread_info.resampler, nbytes);
1381     }
1382
1383     if (i->thread_info.rewrite_nbytes != (size_t) -1) {
1384         if (rewrite) {
1385             /* Make sure to not overwrite over underruns */
1386             if (nbytes > i->thread_info.playing_for)
1387                 nbytes = (size_t) i->thread_info.playing_for;
1388
1389             i->thread_info.rewrite_nbytes = nbytes;
1390         } else
1391             i->thread_info.rewrite_nbytes = (size_t) -1;
1392     }
1393
1394     i->thread_info.rewrite_flush =
1395         i->thread_info.rewrite_flush ||
1396         (flush && i->thread_info.rewrite_nbytes != 0);
1397
1398     i->thread_info.dont_rewind_render =
1399         i->thread_info.dont_rewind_render ||
1400         dont_rewind_render;
1401
1402     if (nbytes != (size_t) -1) {
1403
1404         /* Transform to sink domain */
1405         if (i->thread_info.resampler)
1406             nbytes = pa_resampler_result(i->thread_info.resampler, nbytes);
1407
1408         if (nbytes > lbq)
1409             pa_sink_request_rewind(i->sink, nbytes - lbq);
1410         else
1411             /* This call will make sure process_rewind() is called later */
1412             pa_sink_request_rewind(i->sink, 0);
1413     }
1414 }
1415
1416 /* Called from main context */
1417 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret) {
1418     pa_sink_input_assert_ref(i);
1419     pa_assert(ret);
1420
1421     pa_silence_memchunk_get(
1422                 &i->core->silence_cache,
1423                 i->core->mempool,
1424                 ret,
1425                 &i->sample_spec,
1426                 i->thread_info.resampler ? pa_resampler_max_block_size(i->thread_info.resampler) : 0);
1427
1428     return ret;
1429 }