code.delx.au - pulseaudio/blob - src/modules/module-card-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
  33 #include <pulse/gccmacro.h>
  34 #include <pulse/xmalloc.h>
  35 #include <pulse/timeval.h>
  36 #include <pulse/rtclock.h>
  37
  38 #include <pulsecore/core-error.h>
  39 #include <pulsecore/module.h>
  40 #include <pulsecore/core-util.h>
  41 #include <pulsecore/modargs.h>
  42 #include <pulsecore/log.h>
  43 #include <pulsecore/core-subscribe.h>
  44 #include <pulsecore/card.h>
  45 #include <pulsecore/namereg.h>
  46 #include <pulsecore/database.h>
  47 #include <pulsecore/tagstruct.h>
  48
  49 #include "module-card-restore-symdef.h"
  50
  51 PA_MODULE_AUTHOR("Lennart Poettering");
  52 PA_MODULE_DESCRIPTION("Automatically restore profile of cards");
  53 PA_MODULE_VERSION(PACKAGE_VERSION);
  54 PA_MODULE_LOAD_ONCE(true);
  55
  56 #define SAVE_INTERVAL (10 * PA_USEC_PER_SEC)
  57
  58 static const char* const valid_modargs[] = {
  59     NULL
  60 };
  61
  62 struct userdata {
  63     pa_core *core;
  64     pa_module *module;
  65     pa_hook_slot *card_new_hook_slot;
  66     pa_hook_slot *card_put_hook_slot;
  67     pa_hook_slot *card_profile_changed_hook_slot;
  68     pa_hook_slot *card_profile_added_hook_slot;
  69     pa_hook_slot *port_offset_hook_slot;
  70     pa_time_event *save_time_event;
  71     pa_database *database;
  72     bool hooks_connected;
  73 };
  74
  75 #define ENTRY_VERSION 2
  76
  77 struct port_info {
  78     char *name;
  79     int64_t offset;
  80 };
  81
  82 struct entry {
  83     uint8_t version;
  84     char *profile;
  85     pa_hashmap *ports; /* Port name -> struct port_info */
  86 };
  87
  88 static void save_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *t, void *userdata) {
  89     struct userdata *u = userdata;
  90
  91     pa_assert(a);
  92     pa_assert(e);
  93     pa_assert(u);
  94
  95     pa_assert(e == u->save_time_event);
  96     u->core->mainloop->time_free(u->save_time_event);
  97     u->save_time_event = NULL;
  98
  99     pa_database_sync(u->database);
 100     pa_log_info("Synced.");
 101 }
 102
 103 static void trigger_save(struct userdata *u) {
 104     if (u->save_time_event)
 105         return;
 106
 107     u->save_time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + SAVE_INTERVAL, save_time_callback, u);
 108 }
 109
 110 static void port_info_free(struct port_info *p_info) {
 111     pa_assert(p_info);
 112
 113     pa_xfree(p_info->name);
 114     pa_xfree(p_info);
 115 }
 116
 117 static struct entry* entry_new(void) {
 118     struct entry *r = pa_xnew0(struct entry, 1);
 119     r->version = ENTRY_VERSION;
 120     r->ports = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) port_info_free);
 121     return r;
 122 }
 123
 124 static struct port_info *port_info_new(pa_device_port *port) {
 125     struct port_info *p_info;
 126
 127     if (port) {
 128         p_info = pa_xnew(struct port_info, 1);
 129         p_info->name = pa_xstrdup(port->name);
 130         p_info->offset = port->latency_offset;
 131     } else
 132         p_info = pa_xnew0(struct port_info, 1);
 133
 134     return p_info;
 135 }
 136
 137 static void entry_free(struct entry* e) {
 138     pa_assert(e);
 139
 140     pa_xfree(e->profile);
 141     pa_hashmap_free(e->ports);
 142
 143     pa_xfree(e);
 144 }
 145
 146 static struct entry *entry_from_card(pa_card *card) {
 147     struct port_info *p_info;
 148     struct entry *entry;
 149     pa_device_port *port;
 150     void *state;
 151
 152     pa_assert(card);
 153
 154     entry = entry_new();
 155     if (card->save_profile)
 156         entry->profile = pa_xstrdup(card->active_profile->name);
 157
 158     PA_HASHMAP_FOREACH(port, card->ports, state) {
 159         p_info = port_info_new(port);
 160         pa_assert_se(pa_hashmap_put(entry->ports, p_info->name, p_info) >= 0);
 161     }
 162
 163     return entry;
 164 }
 165
 166 static bool entrys_equal(struct entry *a, struct entry *b) {
 167     struct port_info *Ap_info, *Bp_info;
 168     void *state;
 169
 170     pa_assert(a);
 171     pa_assert(b);
 172
 173     if (!pa_streq(a->profile, b->profile) ||
 174             pa_hashmap_size(a->ports) != pa_hashmap_size(b->ports))
 175         return false;
 176
 177     PA_HASHMAP_FOREACH(Ap_info, a->ports, state) {
 178         if ((Bp_info = pa_hashmap_get(b->ports, Ap_info->name))) {
 179             if (Ap_info->offset != Bp_info->offset)
 180                 return false;
 181         } else
 182             return false;
 183     }
 184
 185     return true;
 186 }
 187
 188 static bool entry_write(struct userdata *u, const char *name, const struct entry *e) {
 189     pa_tagstruct *t;
 190     pa_datum key, data;
 191     bool r;
 192     void *state;
 193     struct port_info *p_info;
 194
 195     pa_assert(u);
 196     pa_assert(name);
 197     pa_assert(e);
 198
 199     t = pa_tagstruct_new(NULL, 0);
 200     pa_tagstruct_putu8(t, e->version);
 201     pa_tagstruct_puts(t, e->profile);
 202     pa_tagstruct_putu32(t, pa_hashmap_size(e->ports));
 203
 204     PA_HASHMAP_FOREACH(p_info, e->ports, state) {
 205         pa_tagstruct_puts(t, p_info->name);
 206         pa_tagstruct_puts64(t, p_info->offset);
 207     }
 208
 209     key.data = (char *) name;
 210     key.size = strlen(name);
 211
 212     data.data = (void*)pa_tagstruct_data(t, &data.size);
 213
 214     r = (pa_database_set(u->database, &key, &data, true) == 0);
 215
 216     pa_tagstruct_free(t);
 217
 218     return r;
 219 }
 220
 221 #ifdef ENABLE_LEGACY_DATABASE_ENTRY_FORMAT
 222
 223 #define LEGACY_ENTRY_VERSION 1
 224 static struct entry* legacy_entry_read(struct userdata *u, pa_datum *data) {
 225     struct legacy_entry {
 226         uint8_t version;
 227         char profile[PA_NAME_MAX];
 228     } PA_GCC_PACKED ;
 229     struct legacy_entry *le;
 230     struct entry *e;
 231
 232     pa_assert(u);
 233     pa_assert(data);
 234
 235     if (data->size != sizeof(struct legacy_entry)) {
 236         pa_log_debug("Size does not match.");
 237         return NULL;
 238     }
 239
 240     le = (struct legacy_entry*)data->data;
 241
 242     if (le->version != LEGACY_ENTRY_VERSION) {
 243         pa_log_debug("Version mismatch.");
 244         return NULL;
 245     }
 246
 247     if (!memchr(le->profile, 0, sizeof(le->profile))) {
 248         pa_log_warn("Profile has missing NUL byte.");
 249         return NULL;
 250     }
 251
 252     e = entry_new();
 253     e->profile = pa_xstrdup(le->profile);
 254     return e;
 255 }
 256 #endif
 257
 258 static struct entry* entry_read(struct userdata *u, const char *name) {
 259     pa_datum key, data;
 260     struct entry *e = NULL;
 261     pa_tagstruct *t = NULL;
 262     const char* profile;
 263
 264     pa_assert(u);
 265     pa_assert(name);
 266
 267     key.data = (char*) name;
 268     key.size = strlen(name);
 269
 270     pa_zero(data);
 271
 272     if (!pa_database_get(u->database, &key, &data))
 273         goto fail;
 274
 275     t = pa_tagstruct_new(data.data, data.size);
 276     e = entry_new();
 277
 278     if (pa_tagstruct_getu8(t, &e->version) < 0 ||
 279         e->version > ENTRY_VERSION ||
 280         pa_tagstruct_gets(t, &profile) < 0) {
 281
 282         goto fail;
 283     }
 284
 285     if (!profile)
 286         profile = "";
 287
 288     e->profile = pa_xstrdup(profile);
 289
 290     if (e->version >= 2) {
 291         uint32_t port_count = 0;
 292         const char *port_name = NULL;
 293         int64_t port_offset = 0;
 294         struct port_info *p_info;
 295         unsigned i;
 296
 297         if (pa_tagstruct_getu32(t, &port_count) < 0)
 298             goto fail;
 299
 300         for (i = 0; i < port_count; i++) {
 301             if (pa_tagstruct_gets(t, &port_name) < 0 ||
 302                 !port_name ||
 303                 pa_hashmap_get(e->ports, port_name) ||
 304                 pa_tagstruct_gets64(t, &port_offset) < 0)
 305                 goto fail;
 306
 307             p_info = port_info_new(NULL);
 308             p_info->name = pa_xstrdup(port_name);
 309             p_info->offset = port_offset;
 310
 311             pa_assert_se(pa_hashmap_put(e->ports, p_info->name, p_info) >= 0);
 312         }
 313     }
 314
 315     if (!pa_tagstruct_eof(t))
 316         goto fail;
 317
 318     pa_tagstruct_free(t);
 319     pa_datum_free(&data);
 320
 321     return e;
 322
 323 fail:
 324
 325     pa_log_debug("Database contains invalid data for key: %s (probably pre-v1.0 data)", name);
 326
 327     if (e)
 328         entry_free(e);
 329     if (t)
 330         pa_tagstruct_free(t);
 331
 332 #ifdef ENABLE_LEGACY_DATABASE_ENTRY_FORMAT
 333     pa_log_debug("Attempting to load legacy (pre-v1.0) data for key: %s", name);
 334     if ((e = legacy_entry_read(u, &data))) {
 335         pa_log_debug("Success. Saving new format for key: %s", name);
 336         if (entry_write(u, name, e))
 337             trigger_save(u);
 338         pa_datum_free(&data);
 339         return e;
 340     } else
 341         pa_log_debug("Unable to load legacy (pre-v1.0) data for key: %s. Ignoring.", name);
 342 #endif
 343
 344     pa_datum_free(&data);
 345     return NULL;
 346 }
 347
 348 static void show_full_info(pa_card *card) {
 349     pa_assert(card);
 350
 351     if (card->save_profile)
 352         pa_log_info("Storing profile and port latency offsets for card %s.", card->name);
 353     else
 354         pa_log_info("Storing port latency offsets for card %s.", card->name);
 355 }
 356
 357 static pa_hook_result_t card_put_hook_callback(pa_core *c, pa_card *card, struct userdata *u) {
 358     struct entry *entry, *old;
 359
 360     pa_assert(card);
 361
 362     entry = entry_from_card(card);
 363
 364     if ((old = entry_read(u, card->name))) {
 365         if (!card->save_profile)
 366             entry->profile = pa_xstrdup(old->profile);
 367         if (entrys_equal(entry, old))
 368             goto finish;
 369     }
 370
 371     show_full_info(card);
 372
 373     if (entry_write(u, card->name, entry))
 374         trigger_save(u);
 375
 376 finish:
 377     entry_free(entry);
 378     if (old)
 379         entry_free(old);
 380
 381     return PA_HOOK_OK;
 382 }
 383
 384 static pa_hook_result_t card_profile_changed_callback(pa_core *c, pa_card *card, struct userdata *u) {
 385     struct entry *entry;
 386
 387     pa_assert(card);
 388
 389     if (!card->save_profile)
 390         return PA_HOOK_OK;
 391
 392     if ((entry = entry_read(u, card->name))) {
 393         pa_xfree(entry->profile);
 394         entry->profile = pa_xstrdup(card->active_profile->name);
 395         pa_log_info("Storing card profile for card %s.", card->name);
 396     } else {
 397         entry = entry_from_card(card);
 398         show_full_info(card);
 399     }
 400
 401     if (entry_write(u, card->name, entry))
 402         trigger_save(u);
 403
 404     entry_free(entry);
 405     return PA_HOOK_OK;
 406 }
 407
 408 static pa_hook_result_t card_profile_added_callback(pa_core *c, pa_card_profile *profile, struct userdata *u) {
 409     struct entry *entry;
 410
 411     pa_assert(profile);
 412
 413     if (!(entry = entry_read(u, profile->card->name)))
 414         return PA_HOOK_OK;
 415
 416     if (pa_safe_streq(entry->profile, profile->name)) {
 417         if (pa_card_set_profile(profile->card, profile, true) >= 0)
 418             pa_log_info("Restored profile '%s' for card %s.", profile->name, profile->card->name);
 419     }
 420
 421     entry_free(entry);
 422
 423     return PA_HOOK_OK;
 424 }
 425
 426 static pa_hook_result_t port_offset_change_callback(pa_core *c, pa_device_port *port, struct userdata *u) {
 427     struct entry *entry;
 428     pa_card *card;
 429
 430     pa_assert(port);
 431     card = port->card;
 432
 433     if ((entry = entry_read(u, card->name))) {
 434         struct port_info *p_info;
 435
 436         if ((p_info = pa_hashmap_get(entry->ports, port->name)))
 437             p_info->offset = port->latency_offset;
 438         else {
 439             p_info = port_info_new(port);
 440             pa_assert_se(pa_hashmap_put(entry->ports, p_info->name, p_info) >= 0);
 441         }
 442
 443         pa_log_info("Storing latency offset for port %s on card %s.", port->name, card->name);
 444
 445     } else {
 446         entry = entry_from_card(card);
 447         show_full_info(card);
 448     }
 449
 450     if (entry_write(u, card->name, entry))
 451         trigger_save(u);
 452
 453     entry_free(entry);
 454     return PA_HOOK_OK;
 455 }
 456
 457 static pa_hook_result_t card_new_hook_callback(pa_core *c, pa_card_new_data *new_data, struct userdata *u) {
 458     struct entry *e;
 459     void *state;
 460     pa_device_port *p;
 461     struct port_info *p_info;
 462
 463     pa_assert(new_data);
 464
 465     if (!(e = entry_read(u, new_data->name)))
 466         return PA_HOOK_OK;
 467
 468     if (e->profile[0]) {
 469         if (!new_data->active_profile) {
 470             pa_card_new_data_set_profile(new_data, e->profile);
 471             pa_log_info("Restored profile '%s' for card %s.", new_data->active_profile, new_data->name);
 472             new_data->save_profile = true;
 473
 474         } else
 475             pa_log_debug("Not restoring profile for card %s, because already set.", new_data->name);
 476     }
 477
 478     /* Always restore the latency offsets because their
 479      * initial value is always 0 */
 480
 481     pa_log_info("Restoring port latency offsets for card %s.", new_data->name);
 482
 483     PA_HASHMAP_FOREACH(p_info, e->ports, state)
 484         if ((p = pa_hashmap_get(new_data->ports, p_info->name)))
 485             p->latency_offset = p_info->offset;
 486
 487     entry_free(e);
 488
 489     return PA_HOOK_OK;
 490 }
 491
 492 int pa__init(pa_module*m) {
 493     pa_modargs *ma = NULL;
 494     struct userdata *u;
 495     char *fname;
 496
 497     pa_assert(m);
 498
 499     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 500         pa_log("Failed to parse module arguments");
 501         goto fail;
 502     }
 503
 504     m->userdata = u = pa_xnew0(struct userdata, 1);
 505     u->core = m->core;
 506     u->module = m;
 507
 508     u->card_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CARD_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) card_new_hook_callback, u);
 509     u->card_put_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CARD_PUT], PA_HOOK_NORMAL, (pa_hook_cb_t) card_put_hook_callback, u);
 510     u->card_profile_changed_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CARD_PROFILE_CHANGED], PA_HOOK_NORMAL, (pa_hook_cb_t) card_profile_changed_callback, u);
 511     u->card_profile_added_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CARD_PROFILE_ADDED], PA_HOOK_NORMAL, (pa_hook_cb_t) card_profile_added_callback, u);
 512     u->port_offset_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_PORT_LATENCY_OFFSET_CHANGED], PA_HOOK_NORMAL, (pa_hook_cb_t) port_offset_change_callback, u);
 513     u->hooks_connected = true;
 514
 515     if (!(fname = pa_state_path("card-database", true)))
 516         goto fail;
 517
 518     if (!(u->database = pa_database_open(fname, true))) {
 519         pa_log("Failed to open volume database '%s': %s", fname, pa_cstrerror(errno));
 520         pa_xfree(fname);
 521         goto fail;
 522     }
 523
 524     pa_log_info("Successfully opened database file '%s'.", fname);
 525     pa_xfree(fname);
 526
 527     pa_modargs_free(ma);
 528     return 0;
 529
 530 fail:
 531     pa__done(m);
 532
 533     if (ma)
 534         pa_modargs_free(ma);
 535
 536     return -1;
 537 }
 538
 539 void pa__done(pa_module*m) {
 540     struct userdata* u;
 541
 542     pa_assert(m);
 543
 544     if (!(u = m->userdata))
 545         return;
 546
 547     if (u->hooks_connected) {
 548         pa_hook_slot_free(u->card_new_hook_slot);
 549         pa_hook_slot_free(u->card_put_hook_slot);
 550         pa_hook_slot_free(u->card_profile_changed_hook_slot);
 551         pa_hook_slot_free(u->card_profile_added_hook_slot);
 552         pa_hook_slot_free(u->port_offset_hook_slot);
 553     }
 554
 555     if (u->save_time_event)
 556         u->core->mainloop->time_free(u->save_time_event);
 557
 558     if (u->database)
 559         pa_database_close(u->database);
 560
 561     pa_xfree(u);
 562 }