code.delx.au - pulseaudio/blob - src/modules/module-device-restore.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2006-2008 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <unistd.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <sys/types.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <ctype.h>
  33
  34 #include <pulse/xmalloc.h>
  35 #include <pulse/volume.h>
  36 #include <pulse/timeval.h>
  37 #include <pulse/util.h>
  38 #include <pulse/rtclock.h>
  39
  40 #include <pulsecore/core-error.h>
  41 #include <pulsecore/module.h>
  42 #include <pulsecore/core-util.h>
  43 #include <pulsecore/modargs.h>
  44 #include <pulsecore/log.h>
  45 #include <pulsecore/core-subscribe.h>
  46 #include <pulsecore/sink-input.h>
  47 #include <pulsecore/source-output.h>
  48 #include <pulsecore/namereg.h>
  49 #include <pulsecore/database.h>
  50
  51 #include "module-device-restore-symdef.h"
  52
  53 PA_MODULE_AUTHOR("Lennart Poettering");
  54 PA_MODULE_DESCRIPTION("Automatically restore the volume/mute state of devices");
  55 PA_MODULE_VERSION(PACKAGE_VERSION);
  56 PA_MODULE_LOAD_ONCE(TRUE);
  57 PA_MODULE_USAGE(
  58         "restore_port=<Save/restore port?> "
  59         "restore_volume=<Save/restore volumes?> "
  60         "restore_muted=<Save/restore muted states?>");
  61
  62 #define SAVE_INTERVAL (10 * PA_USEC_PER_SEC)
  63
  64 static const char* const valid_modargs[] = {
  65     "restore_volume",
  66     "restore_muted",
  67     "restore_port",
  68     NULL
  69 };
  70
  71 struct userdata {
  72     pa_core *core;
  73     pa_module *module;
  74     pa_subscription *subscription;
  75     pa_hook_slot
  76         *sink_new_hook_slot,
  77         *sink_fixate_hook_slot,
  78         *source_new_hook_slot,
  79         *source_fixate_hook_slot;
  80     pa_time_event *save_time_event;
  81     pa_database *database;
  82
  83     pa_bool_t restore_volume:1;
  84     pa_bool_t restore_muted:1;
  85     pa_bool_t restore_port:1;
  86 };
  87
  88 #define ENTRY_VERSION 2
  89
  90 struct entry {
  91     uint8_t version;
  92     pa_bool_t muted_valid:1, volume_valid:1, port_valid:1;
  93     pa_bool_t muted:1;
  94     pa_channel_map channel_map;
  95     pa_cvolume volume;
  96     char port[PA_NAME_MAX];
  97 } PA_GCC_PACKED;
  98
  99 static void save_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *t, void *userdata) {
 100     struct userdata *u = userdata;
 101
 102     pa_assert(a);
 103     pa_assert(e);
 104     pa_assert(u);
 105
 106     pa_assert(e == u->save_time_event);
 107     u->core->mainloop->time_free(u->save_time_event);
 108     u->save_time_event = NULL;
 109
 110     pa_database_sync(u->database);
 111     pa_log_info("Synced.");
 112 }
 113
 114 static struct entry* read_entry(struct userdata *u, const char *name) {
 115     pa_datum key, data;
 116     struct entry *e;
 117
 118     pa_assert(u);
 119     pa_assert(name);
 120
 121     key.data = (char*) name;
 122     key.size = strlen(name);
 123
 124     pa_zero(data);
 125
 126     if (!pa_database_get(u->database, &key, &data))
 127         goto fail;
 128
 129     if (data.size != sizeof(struct entry)) {
 130         pa_log_debug("Database contains entry for device %s of wrong size %lu != %lu. Probably due to upgrade, ignoring.", name, (unsigned long) data.size, (unsigned long) sizeof(struct entry));
 131         goto fail;
 132     }
 133
 134     e = (struct entry*) data.data;
 135
 136     if (e->version != ENTRY_VERSION) {
 137         pa_log_debug("Version of database entry for device %s doesn't match our version. Probably due to upgrade, ignoring.", name);
 138         goto fail;
 139     }
 140
 141     if (!memchr(e->port, 0, sizeof(e->port))) {
 142         pa_log_warn("Database contains entry for device %s with missing NUL byte in port name", name);
 143         goto fail;
 144     }
 145
 146     if (e->volume_valid && !pa_channel_map_valid(&e->channel_map)) {
 147         pa_log_warn("Invalid channel map stored in database for device %s", name);
 148         goto fail;
 149     }
 150
 151     if (e->volume_valid && (!pa_cvolume_valid(&e->volume) || !pa_cvolume_compatible_with_channel_map(&e->volume, &e->channel_map))) {
 152         pa_log_warn("Volume and channel map don't match in database entry for device %s", name);
 153         goto fail;
 154     }
 155
 156     return e;
 157
 158 fail:
 159
 160     pa_datum_free(&data);
 161     return NULL;
 162 }
 163
 164 static void trigger_save(struct userdata *u) {
 165     if (u->save_time_event)
 166         return;
 167
 168     u->save_time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + SAVE_INTERVAL, save_time_callback, u);
 169 }
 170
 171 static pa_bool_t entries_equal(const struct entry *a, const struct entry *b) {
 172     pa_cvolume t;
 173
 174     if (a->port_valid != b->port_valid ||
 175         (a->port_valid && strncmp(a->port, b->port, sizeof(a->port))))
 176         return FALSE;
 177
 178     if (a->muted_valid != b->muted_valid ||
 179         (a->muted_valid && (a->muted != b->muted)))
 180         return FALSE;
 181
 182     t = b->volume;
 183     if (a->volume_valid != b->volume_valid ||
 184         (a->volume_valid && !pa_cvolume_equal(pa_cvolume_remap(&t, &b->channel_map, &a->channel_map), &a->volume)))
 185         return FALSE;
 186
 187     return TRUE;
 188 }
 189
 190 static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
 191     struct userdata *u = userdata;
 192     struct entry entry, *old;
 193     char *name;
 194     pa_datum key, data;
 195
 196     pa_assert(c);
 197     pa_assert(u);
 198
 199     if (t != (PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_NEW) &&
 200         t != (PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE) &&
 201         t != (PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_NEW) &&
 202         t != (PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE))
 203         return;
 204
 205     pa_zero(entry);
 206     entry.version = ENTRY_VERSION;
 207
 208     if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK) {
 209         pa_sink *sink;
 210
 211         if (!(sink = pa_idxset_get_by_index(c->sinks, idx)))
 212             return;
 213
 214         name = pa_sprintf_malloc("sink:%s", sink->name);
 215
 216         if ((old = read_entry(u, name)))
 217             entry = *old;
 218
 219         if (sink->save_volume) {
 220             entry.channel_map = sink->channel_map;
 221             entry.volume = *pa_sink_get_volume(sink, FALSE, TRUE);
 222             entry.volume_valid = TRUE;
 223         }
 224
 225         if (sink->save_muted) {
 226             entry.muted = pa_sink_get_mute(sink, FALSE);
 227             entry.muted_valid = TRUE;
 228         }
 229
 230         if (sink->save_port) {
 231             pa_strlcpy(entry.port, sink->active_port ? sink->active_port->name : "", sizeof(entry.port));
 232             entry.port_valid = TRUE;
 233         }
 234
 235     } else {
 236         pa_source *source;
 237
 238         pa_assert((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SOURCE);
 239
 240         if (!(source = pa_idxset_get_by_index(c->sources, idx)))
 241             return;
 242
 243         name = pa_sprintf_malloc("source:%s", source->name);
 244
 245         if ((old = read_entry(u, name)))
 246             entry = *old;
 247
 248         if (source->save_volume) {
 249             entry.channel_map = source->channel_map;
 250             entry.volume = *pa_source_get_volume(source, FALSE);
 251             entry.volume_valid = TRUE;
 252         }
 253
 254         if (source->save_muted) {
 255             entry.muted = pa_source_get_mute(source, FALSE);
 256             entry.muted_valid = TRUE;
 257         }
 258
 259         if (source->save_port) {
 260             pa_strlcpy(entry.port, source->active_port ? source->active_port->name : "", sizeof(entry.port));
 261             entry.port_valid = TRUE;
 262         }
 263     }
 264
 265     if (old) {
 266
 267         if (entries_equal(old, &entry)) {
 268             pa_xfree(old);
 269             pa_xfree(name);
 270             return;
 271         }
 272
 273         pa_xfree(old);
 274     }
 275
 276     key.data = name;
 277     key.size = strlen(name);
 278
 279     data.data = &entry;
 280     data.size = sizeof(entry);
 281
 282     pa_log_info("Storing volume/mute/port for device %s.", name);
 283
 284     pa_database_set(u->database, &key, &data, TRUE);
 285
 286     pa_xfree(name);
 287
 288     trigger_save(u);
 289 }
 290
 291 static pa_hook_result_t sink_new_hook_callback(pa_core *c, pa_sink_new_data *new_data, struct userdata *u) {
 292     char *name;
 293     struct entry *e;
 294
 295     pa_assert(new_data);
 296
 297     if (!u->restore_port)
 298         return PA_HOOK_OK;
 299
 300     name = pa_sprintf_malloc("sink:%s", new_data->name);
 301
 302     if ((e = read_entry(u, name))) {
 303
 304         if (e->port_valid) {
 305             if (!new_data->active_port) {
 306                 pa_log_info("Restoring port for sink %s.", name);
 307                 pa_sink_new_data_set_port(new_data, e->port);
 308                 new_data->save_port = FALSE;
 309             } else
 310                 pa_log_debug("Not restoring port for sink %s, because already set.", name);
 311         }
 312
 313         pa_xfree(e);
 314     }
 315
 316     pa_xfree(name);
 317
 318     return PA_HOOK_OK;
 319 }
 320
 321 static pa_hook_result_t sink_fixate_hook_callback(pa_core *c, pa_sink_new_data *new_data, struct userdata *u) {
 322     char *name;
 323     struct entry *e;
 324
 325     pa_assert(new_data);
 326
 327     name = pa_sprintf_malloc("sink:%s", new_data->name);
 328
 329     if ((e = read_entry(u, name))) {
 330
 331         if (u->restore_volume && e->volume_valid) {
 332
 333             if (!new_data->volume_is_set) {
 334                 pa_cvolume v;
 335
 336                 pa_log_info("Restoring volume for sink %s.", new_data->name);
 337
 338                 v = e->volume;
 339                 pa_cvolume_remap(&v, &e->channel_map, &new_data->channel_map);
 340                 pa_sink_new_data_set_volume(new_data, &v);
 341
 342                 new_data->save_volume = FALSE;
 343             } else
 344                 pa_log_debug("Not restoring volume for sink %s, because already set.", new_data->name);
 345         }
 346
 347         if (u->restore_muted && e->muted_valid) {
 348
 349             if (!new_data->muted_is_set) {
 350                 pa_log_info("Restoring mute state for sink %s.", new_data->name);
 351                 pa_sink_new_data_set_muted(new_data, e->muted);
 352                 new_data->save_muted = FALSE;
 353             } else
 354                 pa_log_debug("Not restoring mute state for sink %s, because already set.", new_data->name);
 355         }
 356
 357         pa_xfree(e);
 358     }
 359
 360     pa_xfree(name);
 361
 362     return PA_HOOK_OK;
 363 }
 364
 365 static pa_hook_result_t source_new_hook_callback(pa_core *c, pa_source_new_data *new_data, struct userdata *u) {
 366     char *name;
 367     struct entry *e;
 368
 369     pa_assert(new_data);
 370
 371     if (!u->restore_port)
 372         return PA_HOOK_OK;
 373
 374     name = pa_sprintf_malloc("source:%s", new_data->name);
 375
 376     if ((e = read_entry(u, name))) {
 377
 378         if (e->port_valid) {
 379             if (!new_data->active_port) {
 380                 pa_log_info("Restoring port for source %s.", name);
 381                 pa_source_new_data_set_port(new_data, e->port);
 382                 new_data->save_port = FALSE;
 383             } else
 384                 pa_log_debug("Not restoring port for source %s, because already set.", name);
 385         }
 386
 387         pa_xfree(e);
 388     }
 389
 390     pa_xfree(name);
 391
 392     return PA_HOOK_OK;
 393 }
 394
 395 static pa_hook_result_t source_fixate_hook_callback(pa_core *c, pa_source_new_data *new_data, struct userdata *u) {
 396     char *name;
 397     struct entry *e;
 398
 399     pa_assert(new_data);
 400
 401     name = pa_sprintf_malloc("source:%s", new_data->name);
 402
 403     if ((e = read_entry(u, name))) {
 404
 405         if (u->restore_volume && e->volume_valid) {
 406
 407             if (!new_data->volume_is_set) {
 408                 pa_cvolume v;
 409
 410                 pa_log_info("Restoring volume for source %s.", new_data->name);
 411
 412                 v = e->volume;
 413                 pa_cvolume_remap(&v, &e->channel_map, &new_data->channel_map);
 414                 pa_source_new_data_set_volume(new_data, &v);
 415
 416                 new_data->save_volume = FALSE;
 417             } else
 418                 pa_log_debug("Not restoring volume for source %s, because already set.", new_data->name);
 419         }
 420
 421         if (u->restore_muted && e->muted_valid) {
 422
 423             if (!new_data->muted_is_set) {
 424                 pa_log_info("Restoring mute state for source %s.", new_data->name);
 425                 pa_source_new_data_set_muted(new_data, e->muted);
 426                 new_data->save_muted = FALSE;
 427             } else
 428                 pa_log_debug("Not restoring mute state for source %s, because already set.", new_data->name);
 429         }
 430
 431         pa_xfree(e);
 432     }
 433
 434     pa_xfree(name);
 435
 436     return PA_HOOK_OK;
 437 }
 438
 439 int pa__init(pa_module*m) {
 440     pa_modargs *ma = NULL;
 441     struct userdata *u;
 442     char *fname;
 443     pa_sink *sink;
 444     pa_source *source;
 445     uint32_t idx;
 446     pa_bool_t restore_volume = TRUE, restore_muted = TRUE, restore_port = TRUE;
 447
 448     pa_assert(m);
 449
 450     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 451         pa_log("Failed to parse module arguments");
 452         goto fail;
 453     }
 454
 455     if (pa_modargs_get_value_boolean(ma, "restore_volume", &restore_volume) < 0 ||
 456         pa_modargs_get_value_boolean(ma, "restore_muted", &restore_muted) < 0 ||
 457         pa_modargs_get_value_boolean(ma, "restore_port", &restore_port) < 0) {
 458         pa_log("restore_port=, restore_volume= and restore_muted= expect boolean arguments");
 459         goto fail;
 460     }
 461
 462     if (!restore_muted && !restore_volume && !restore_port)
 463         pa_log_warn("Neither restoring volume, nor restoring muted, nor restoring port enabled!");
 464
 465     m->userdata = u = pa_xnew0(struct userdata, 1);
 466     u->core = m->core;
 467     u->module = m;
 468     u->restore_volume = restore_volume;
 469     u->restore_muted = restore_muted;
 470     u->restore_port = restore_port;
 471
 472     u->subscription = pa_subscription_new(m->core, PA_SUBSCRIPTION_MASK_SINK|PA_SUBSCRIPTION_MASK_SOURCE, subscribe_callback, u);
 473
 474     if (restore_port) {
 475         u->sink_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) sink_new_hook_callback, u);
 476         u->source_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) source_new_hook_callback, u);
 477     }
 478
 479     if (restore_muted || restore_volume) {
 480         u->sink_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_FIXATE], PA_HOOK_EARLY, (pa_hook_cb_t) sink_fixate_hook_callback, u);
 481         u->source_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], PA_HOOK_EARLY, (pa_hook_cb_t) source_fixate_hook_callback, u);
 482     }
 483
 484     if (!(fname = pa_state_path("device-volumes", TRUE)))
 485         goto fail;
 486
 487     if (!(u->database = pa_database_open(fname, TRUE))) {
 488         pa_log("Failed to open volume database '%s': %s", fname, pa_cstrerror(errno));
 489         pa_xfree(fname);
 490         goto fail;
 491     }
 492
 493     pa_log_info("Sucessfully opened database file '%s'.", fname);
 494     pa_xfree(fname);
 495
 496     for (sink = pa_idxset_first(m->core->sinks, &idx); sink; sink = pa_idxset_next(m->core->sinks, &idx))
 497         subscribe_callback(m->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_NEW, sink->index, u);
 498
 499     for (source = pa_idxset_first(m->core->sources, &idx); source; source = pa_idxset_next(m->core->sources, &idx))
 500         subscribe_callback(m->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_NEW, source->index, u);
 501
 502     pa_modargs_free(ma);
 503     return 0;
 504
 505 fail:
 506     pa__done(m);
 507
 508     if (ma)
 509         pa_modargs_free(ma);
 510
 511     return  -1;
 512 }
 513
 514 void pa__done(pa_module*m) {
 515     struct userdata* u;
 516
 517     pa_assert(m);
 518
 519     if (!(u = m->userdata))
 520         return;
 521
 522     if (u->subscription)
 523         pa_subscription_free(u->subscription);
 524
 525     if (u->sink_fixate_hook_slot)
 526         pa_hook_slot_free(u->sink_fixate_hook_slot);
 527     if (u->source_fixate_hook_slot)
 528         pa_hook_slot_free(u->source_fixate_hook_slot);
 529     if (u->sink_new_hook_slot)
 530         pa_hook_slot_free(u->sink_new_hook_slot);
 531     if (u->source_new_hook_slot)
 532         pa_hook_slot_free(u->source_new_hook_slot);
 533
 534     if (u->save_time_event)
 535         u->core->mainloop->time_free(u->save_time_event);
 536
 537     if (u->database)
 538         pa_database_close(u->database);
 539
 540     pa_xfree(u);
 541 }