code.delx.au - pulseaudio/blob - src/pulsecore/source-output.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include <pulse/utf8.h>
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/core-subscribe.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/namereg.h>
  38
  39 #include "source-output.h"
  40
  41 static PA_DEFINE_CHECK_TYPE(pa_source_output, pa_msgobject);
  42
  43 static void source_output_free(pa_object* mo);
  44
  45 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data) {
  46     pa_assert(data);
  47
  48     memset(data, 0, sizeof(*data));
  49     data->resample_method = PA_RESAMPLER_INVALID;
  50     return data;
  51 }
  52
  53 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map) {
  54     pa_assert(data);
  55
  56     if ((data->channel_map_is_set = !!map))
  57         data->channel_map = *map;
  58 }
  59
  60 void pa_source_output_new_data_set_sample_spec(pa_source_output_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 pa_source_output* pa_source_output_new(
  68         pa_core *core,
  69         pa_source_output_new_data *data,
  70         pa_source_output_flags_t flags) {
  71
  72     pa_source_output *o;
  73     pa_resampler *resampler = NULL;
  74     char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
  75
  76     pa_assert(core);
  77     pa_assert(data);
  78
  79     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], data) < 0)
  80         return NULL;
  81
  82     pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
  83     pa_return_null_if_fail(!data->name || pa_utf8_valid(data->name));
  84
  85     if (!data->source)
  86         data->source = pa_namereg_get(core, NULL, PA_NAMEREG_SOURCE, 1);
  87
  88     pa_return_null_if_fail(data->source);
  89     pa_return_null_if_fail(pa_source_get_state(data->source) != PA_SOURCE_UNLINKED);
  90
  91     if (!data->sample_spec_is_set)
  92         data->sample_spec = data->source->sample_spec;
  93
  94     pa_return_null_if_fail(pa_sample_spec_valid(&data->sample_spec));
  95
  96     if (!data->channel_map_is_set) {
  97         if (data->source->channel_map.channels == data->sample_spec.channels)
  98             data->channel_map = data->source->channel_map;
  99         else
 100             pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
 101     }
 102
 103     pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
 104     pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
 105
 106     if (flags & PA_SOURCE_OUTPUT_FIX_FORMAT)
 107         data->sample_spec.format = data->source->sample_spec.format;
 108
 109     if (flags & PA_SOURCE_OUTPUT_FIX_RATE)
 110         data->sample_spec.rate = data->source->sample_spec.rate;
 111
 112     if (flags & PA_SOURCE_OUTPUT_FIX_CHANNELS) {
 113         data->sample_spec.channels = data->source->sample_spec.channels;
 114         data->channel_map = data->source->channel_map;
 115     }
 116
 117     pa_assert(pa_sample_spec_valid(&data->sample_spec));
 118     pa_assert(pa_channel_map_valid(&data->channel_map));
 119
 120     if (data->resample_method == PA_RESAMPLER_INVALID)
 121         data->resample_method = core->resample_method;
 122
 123     pa_return_null_if_fail(data->resample_method < PA_RESAMPLER_MAX);
 124
 125     if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE], data) < 0)
 126         return NULL;
 127
 128     if (pa_idxset_size(data->source->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 129         pa_log("Failed to create source output: too many outputs per source.");
 130         return NULL;
 131     }
 132
 133     if ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 134         !pa_sample_spec_equal(&data->sample_spec, &data->source->sample_spec) ||
 135         !pa_channel_map_equal(&data->channel_map, &data->source->channel_map)) {
 136
 137         if (!(resampler = pa_resampler_new(
 138                       core->mempool,
 139                       &data->source->sample_spec, &data->source->channel_map,
 140                       &data->sample_spec, &data->channel_map,
 141                       data->resample_method,
 142                       ((flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 143                       ((flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 144                       (core->disable_remixing || (flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 145             pa_log_warn("Unsupported resampling operation.");
 146             return NULL;
 147         }
 148
 149         data->resample_method = pa_resampler_get_method(resampler);
 150     }
 151
 152     o = pa_msgobject_new(pa_source_output);
 153     o->parent.parent.free = source_output_free;
 154     o->parent.process_msg = pa_source_output_process_msg;
 155
 156     o->core = core;
 157     o->state = PA_SOURCE_OUTPUT_INIT;
 158     o->flags = flags;
 159     o->name = pa_xstrdup(data->name);
 160     o->driver = pa_xstrdup(data->driver);
 161     o->module = data->module;
 162     o->source = data->source;
 163     o->client = data->client;
 164
 165     o->resample_method = data->resample_method;
 166     o->sample_spec = data->sample_spec;
 167     o->channel_map = data->channel_map;
 168
 169     o->push = NULL;
 170     o->kill = NULL;
 171     o->get_latency = NULL;
 172     o->detach = NULL;
 173     o->attach = NULL;
 174     o->suspend = NULL;
 175     o->moved = NULL;
 176     o->userdata = NULL;
 177
 178     o->thread_info.state = o->state;
 179     o->thread_info.attached = FALSE;
 180     o->thread_info.sample_spec = o->sample_spec;
 181     o->thread_info.resampler = resampler;
 182
 183     pa_assert_se(pa_idxset_put(core->source_outputs, o, &o->index) == 0);
 184     pa_assert_se(pa_idxset_put(o->source->outputs, pa_source_output_ref(o), NULL) == 0);
 185
 186     pa_log_info("Created output %u \"%s\" on %s with sample spec %s and channel map %s",
 187                 o->index,
 188                 o->name,
 189                 o->source->name,
 190                 pa_sample_spec_snprint(st, sizeof(st), &o->sample_spec),
 191                 pa_channel_map_snprint(cm, sizeof(cm), &o->channel_map));
 192
 193     /* Don't forget to call pa_source_output_put! */
 194
 195     return o;
 196 }
 197
 198 static int source_output_set_state(pa_source_output *o, pa_source_output_state_t state) {
 199     pa_assert(o);
 200
 201     if (o->state == state)
 202         return 0;
 203
 204     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0)
 205         return -1;
 206
 207     if (o->state == PA_SOURCE_OUTPUT_CORKED && state != PA_SOURCE_OUTPUT_CORKED)
 208         pa_assert_se(o->source->n_corked -- >= 1);
 209     else if (o->state != PA_SOURCE_OUTPUT_CORKED && state == PA_SOURCE_OUTPUT_CORKED)
 210         o->source->n_corked++;
 211
 212     pa_source_update_status(o->source);
 213
 214     o->state = state;
 215
 216     if (state != PA_SOURCE_OUTPUT_UNLINKED)
 217         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED], o);
 218
 219     return 0;
 220 }
 221
 222 void pa_source_output_unlink(pa_source_output*o) {
 223     pa_bool_t linked;
 224     pa_assert(o);
 225
 226     /* See pa_sink_unlink() for a couple of comments how this function
 227      * works */
 228
 229     pa_source_output_ref(o);
 230
 231     linked = PA_SOURCE_OUTPUT_LINKED(o->state);
 232
 233     if (linked)
 234         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], o);
 235
 236     pa_idxset_remove_by_data(o->source->core->source_outputs, o, NULL);
 237     if (pa_idxset_remove_by_data(o->source->outputs, o, NULL))
 238         pa_source_output_unref(o);
 239
 240     if (linked) {
 241         pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 242         source_output_set_state(o, PA_SOURCE_OUTPUT_UNLINKED);
 243         pa_source_update_status(o->source);
 244     } else
 245         o->state = PA_SOURCE_OUTPUT_UNLINKED;
 246
 247     o->push = NULL;
 248     o->kill = NULL;
 249     o->get_latency = NULL;
 250     o->attach = NULL;
 251     o->detach = NULL;
 252     o->suspend = NULL;
 253     o->moved = NULL;
 254
 255     if (linked) {
 256         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_REMOVE, o->index);
 257         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST], o);
 258     }
 259
 260     o->source = NULL;
 261     pa_source_output_unref(o);
 262 }
 263
 264 static void source_output_free(pa_object* mo) {
 265     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 266
 267     pa_assert(pa_source_output_refcnt(o) == 0);
 268
 269     if (PA_SOURCE_OUTPUT_LINKED(o->state))
 270         pa_source_output_unlink(o);
 271
 272     pa_log_info("Freeing output %u \"%s\"", o->index, o->name);
 273
 274     pa_assert(!o->thread_info.attached);
 275
 276     if (o->thread_info.resampler)
 277         pa_resampler_free(o->thread_info.resampler);
 278
 279     pa_xfree(o->name);
 280     pa_xfree(o->driver);
 281     pa_xfree(o);
 282 }
 283
 284 void pa_source_output_put(pa_source_output *o) {
 285     pa_source_output_assert_ref(o);
 286
 287     pa_assert(o->state == PA_SOURCE_OUTPUT_INIT);
 288     pa_assert(o->push);
 289
 290     o->thread_info.state = o->state = o->flags & PA_SOURCE_OUTPUT_START_CORKED ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING;
 291
 292     if (o->state == PA_SOURCE_OUTPUT_CORKED)
 293         o->source->n_corked++;
 294
 295     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 296     pa_source_update_status(o->source);
 297
 298     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, o->index);
 299
 300     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], o);
 301 }
 302
 303 void pa_source_output_kill(pa_source_output*o) {
 304     pa_source_output_assert_ref(o);
 305     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 306
 307     if (o->kill)
 308         o->kill(o);
 309 }
 310
 311 pa_usec_t pa_source_output_get_latency(pa_source_output *o) {
 312     pa_usec_t r = 0;
 313
 314     pa_source_output_assert_ref(o);
 315     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 316
 317     if (pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY, &r, 0, NULL) < 0)
 318         r = 0;
 319
 320     if (o->get_latency)
 321         r += o->get_latency(o);
 322
 323     return r;
 324 }
 325
 326 /* Called from thread context */
 327 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk) {
 328     pa_memchunk rchunk;
 329
 330     pa_source_output_assert_ref(o);
 331     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->thread_info.state));
 332     pa_assert(chunk);
 333     pa_assert(chunk->length);
 334
 335     if (!o->push || o->state == PA_SOURCE_OUTPUT_CORKED)
 336         return;
 337
 338     pa_assert(o->state == PA_SOURCE_OUTPUT_RUNNING);
 339
 340     if (!o->thread_info.resampler) {
 341         o->push(o, chunk);
 342         return;
 343     }
 344
 345     pa_resampler_run(o->thread_info.resampler, chunk, &rchunk);
 346     if (!rchunk.length)
 347         return;
 348
 349     pa_assert(rchunk.memblock);
 350     o->push(o, &rchunk);
 351     pa_memblock_unref(rchunk.memblock);
 352 }
 353
 354 void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
 355     pa_source_output_assert_ref(o);
 356     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 357
 358     source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
 359 }
 360
 361 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate) {
 362     pa_source_output_assert_ref(o);
 363     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 364     pa_return_val_if_fail(o->thread_info.resampler, -1);
 365
 366     if (o->sample_spec.rate == rate)
 367         return 0;
 368
 369     o->sample_spec.rate = rate;
 370
 371     pa_asyncmsgq_post(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_RATE, PA_UINT_TO_PTR(rate), 0, NULL, NULL);
 372
 373     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 374     return 0;
 375 }
 376
 377 void pa_source_output_set_name(pa_source_output *o, const char *name) {
 378     pa_source_output_assert_ref(o);
 379
 380     if (!o->name && !name)
 381         return;
 382
 383     if (o->name && name && !strcmp(o->name, name))
 384         return;
 385
 386     pa_xfree(o->name);
 387     o->name = pa_xstrdup(name);
 388
 389     if (PA_SOURCE_OUTPUT_LINKED(o->state)) {
 390         pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NAME_CHANGED], o);
 391         pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 392     }
 393 }
 394
 395 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o) {
 396     pa_source_output_assert_ref(o);
 397
 398     return o->resample_method;
 399 }
 400
 401 int pa_source_output_move_to(pa_source_output *o, pa_source *dest) {
 402     pa_source *origin;
 403     pa_resampler *new_resampler = NULL;
 404     pa_source_output_move_hook_data hook_data;
 405
 406     pa_source_output_assert_ref(o);
 407     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->state));
 408     pa_source_assert_ref(dest);
 409
 410     origin = o->source;
 411
 412     if (dest == origin)
 413         return 0;
 414
 415     if (o->flags & PA_SOURCE_OUTPUT_DONT_MOVE)
 416         return -1;
 417
 418     if (pa_idxset_size(dest->outputs) >= PA_MAX_OUTPUTS_PER_SOURCE) {
 419         pa_log_warn("Failed to move source output: too many outputs per source.");
 420         return -1;
 421     }
 422
 423     if (o->thread_info.resampler &&
 424         pa_sample_spec_equal(&origin->sample_spec, &dest->sample_spec) &&
 425         pa_channel_map_equal(&origin->channel_map, &dest->channel_map))
 426
 427         /* Try to reuse the old resampler if possible */
 428         new_resampler = o->thread_info.resampler;
 429
 430     else if ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ||
 431              !pa_sample_spec_equal(&o->sample_spec, &dest->sample_spec) ||
 432              !pa_channel_map_equal(&o->channel_map, &dest->channel_map)) {
 433
 434         /* Okey, we need a new resampler for the new source */
 435
 436         if (!(new_resampler = pa_resampler_new(
 437                       dest->core->mempool,
 438                       &dest->sample_spec, &dest->channel_map,
 439                       &o->sample_spec, &o->channel_map,
 440                       o->resample_method,
 441                       ((o->flags & PA_SOURCE_OUTPUT_VARIABLE_RATE) ? PA_RESAMPLER_VARIABLE_RATE : 0) |
 442                       ((o->flags & PA_SOURCE_OUTPUT_NO_REMAP) ? PA_RESAMPLER_NO_REMAP : 0) |
 443                       (o->core->disable_remixing || (o->flags & PA_SOURCE_OUTPUT_NO_REMIX) ? PA_RESAMPLER_NO_REMIX : 0)))) {
 444             pa_log_warn("Unsupported resampling operation.");
 445             return -1;
 446         }
 447     }
 448
 449     hook_data.source_output = o;
 450     hook_data.destination = dest;
 451     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE], &hook_data);
 452
 453     /* Okey, let's move it */
 454     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
 455
 456     pa_idxset_remove_by_data(origin->outputs, o, NULL);
 457     pa_idxset_put(dest->outputs, o, NULL);
 458     o->source = dest;
 459
 460     if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED) {
 461         pa_assert_se(origin->n_corked-- >= 1);
 462         dest->n_corked++;
 463     }
 464
 465     /* Replace resampler */
 466     if (new_resampler != o->thread_info.resampler) {
 467         if (o->thread_info.resampler)
 468             pa_resampler_free(o->thread_info.resampler);
 469         o->thread_info.resampler = new_resampler;
 470     }
 471
 472     pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_ADD_OUTPUT, o, 0, NULL);
 473
 474     pa_source_update_status(origin);
 475     pa_source_update_status(dest);
 476
 477     if (o->moved)
 478         o->moved(o);
 479
 480     pa_hook_fire(&o->source->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_POST], o);
 481
 482     pa_log_debug("Successfully moved source output %i from %s to %s.", o->index, origin->name, dest->name);
 483
 484     /* Notify everyone */
 485     pa_subscription_post(o->source->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
 486
 487     return 0;
 488 }
 489
 490 /* Called from thread context */
 491 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk* chunk) {
 492     pa_source_output *o = PA_SOURCE_OUTPUT(mo);
 493
 494     pa_source_output_assert_ref(o);
 495     pa_assert(PA_SOURCE_OUTPUT_LINKED(o->thread_info.state));
 496
 497     switch (code) {
 498
 499         case PA_SOURCE_OUTPUT_MESSAGE_SET_RATE: {
 500
 501             o->thread_info.sample_spec.rate = PA_PTR_TO_UINT(userdata);
 502             pa_resampler_set_output_rate(o->thread_info.resampler, PA_PTR_TO_UINT(userdata));
 503
 504             return 0;
 505         }
 506
 507         case PA_SOURCE_OUTPUT_MESSAGE_SET_STATE: {
 508             o->thread_info.state = PA_PTR_TO_UINT(userdata);
 509
 510             return 0;
 511         }
 512     }
 513
 514     return -1;
 515 }