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 #include <gdbm.h>
  34
  35 #include <pulse/xmalloc.h>
  36 #include <pulse/volume.h>
  37 #include <pulse/timeval.h>
  38 #include <pulse/util.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
  50 #include "module-device-restore-symdef.h"
  51
  52 PA_MODULE_AUTHOR("Lennart Poettering");
  53 PA_MODULE_DESCRIPTION("Automatically restore the volume/mute state of devices");
  54 PA_MODULE_VERSION(PACKAGE_VERSION);
  55 PA_MODULE_LOAD_ONCE(TRUE);
  56 PA_MODULE_USAGE(
  57         "restore_volume=<Save/restore volumes?> "
  58         "restore_muted=<Save/restore muted states?>");
  59
  60 #define SAVE_INTERVAL 10
  61
  62 static const char* const valid_modargs[] = {
  63     "restore_volume",
  64     "restore_muted",
  65     NULL
  66 };
  67
  68 struct userdata {
  69     pa_core *core;
  70     pa_module *module;
  71     pa_subscription *subscription;
  72     pa_hook_slot
  73         *sink_fixate_hook_slot,
  74         *source_fixate_hook_slot;
  75     pa_time_event *save_time_event;
  76     GDBM_FILE gdbm_file;
  77
  78     pa_bool_t restore_volume:1;
  79     pa_bool_t restore_muted:1;
  80 };
  81
  82 #define ENTRY_VERSION 1
  83
  84 struct entry {
  85     uint8_t version;
  86     pa_bool_t muted:1;
  87     pa_channel_map channel_map;
  88     pa_cvolume volume;
  89 } PA_GCC_PACKED;
  90
  91 static void save_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *tv, void *userdata) {
  92     struct userdata *u = userdata;
  93
  94     pa_assert(a);
  95     pa_assert(e);
  96     pa_assert(tv);
  97     pa_assert(u);
  98
  99     pa_assert(e == u->save_time_event);
 100     u->core->mainloop->time_free(u->save_time_event);
 101     u->save_time_event = NULL;
 102
 103     gdbm_sync(u->gdbm_file);
 104     pa_log_info("Synced.");
 105 }
 106
 107 static struct entry* read_entry(struct userdata *u, const char *name) {
 108     datum key, data;
 109     struct entry *e;
 110
 111     pa_assert(u);
 112     pa_assert(name);
 113
 114     key.dptr = (char*) name;
 115     key.dsize = (int) strlen(name);
 116
 117     data = gdbm_fetch(u->gdbm_file, key);
 118
 119     if (!data.dptr)
 120         goto fail;
 121
 122     if (data.dsize != sizeof(struct entry)) {
 123         pa_log_debug("Database contains entry for device %s of wrong size %lu != %lu. Probably due to upgrade, ignoring.", name, (unsigned long) data.dsize, (unsigned long) sizeof(struct entry));
 124         goto fail;
 125     }
 126
 127     e = (struct entry*) data.dptr;
 128
 129     if (e->version != ENTRY_VERSION) {
 130         pa_log_debug("Version of database entry for device %s doesn't match our version. Probably due to upgrade, ignoring.", name);
 131         goto fail;
 132     }
 133
 134     if (!(pa_cvolume_valid(&e->volume))) {
 135         pa_log_warn("Invalid volume stored in database for device %s", name);
 136         goto fail;
 137     }
 138
 139     if (!(pa_channel_map_valid(&e->channel_map))) {
 140         pa_log_warn("Invalid channel map stored in database for device %s", name);
 141         goto fail;
 142     }
 143
 144     if (e->volume.channels != e->channel_map.channels) {
 145         pa_log_warn("Volume and channel map don't match in database entry for device %s", name);
 146         goto fail;
 147     }
 148
 149     return e;
 150
 151 fail:
 152
 153     pa_xfree(data.dptr);
 154     return NULL;
 155 }
 156
 157 static void trigger_save(struct userdata *u) {
 158     struct timeval tv;
 159
 160     if (u->save_time_event)
 161         return;
 162
 163     pa_gettimeofday(&tv);
 164     tv.tv_sec += SAVE_INTERVAL;
 165     u->save_time_event = u->core->mainloop->time_new(u->core->mainloop, &tv, save_time_callback, u);
 166 }
 167
 168 static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
 169     struct userdata *u = userdata;
 170     struct entry entry, *old;
 171     char *name;
 172     datum key, data;
 173
 174     pa_assert(c);
 175     pa_assert(u);
 176
 177     if (t != (PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_NEW) &&
 178         t != (PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE) &&
 179         t != (PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_NEW) &&
 180         t != (PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE))
 181         return;
 182
 183     memset(&entry, 0, sizeof(entry));
 184     entry.version = ENTRY_VERSION;
 185
 186     if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK) {
 187         pa_sink *sink;
 188
 189         if (!(sink = pa_idxset_get_by_index(c->sinks, idx)))
 190             return;
 191
 192         name = pa_sprintf_malloc("sink:%s", sink->name);
 193         entry.channel_map = sink->channel_map;
 194         entry.volume = *pa_sink_get_volume(sink, FALSE);
 195         entry.muted = pa_sink_get_mute(sink, FALSE);
 196
 197     } else {
 198         pa_source *source;
 199
 200         pa_assert((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SOURCE);
 201
 202         if (!(source = pa_idxset_get_by_index(c->sources, idx)))
 203             return;
 204
 205         name = pa_sprintf_malloc("source:%s", source->name);
 206         entry.channel_map = source->channel_map;
 207         entry.volume = *pa_source_get_volume(source, FALSE);
 208         entry.muted = pa_source_get_mute(source, FALSE);
 209     }
 210
 211     if ((old = read_entry(u, name))) {
 212
 213         if (pa_cvolume_equal(pa_cvolume_remap(&old->volume, &old->channel_map, &entry.channel_map), &entry.volume) &&
 214             !old->muted == !entry.muted) {
 215
 216             pa_xfree(old);
 217             pa_xfree(name);
 218             return;
 219         }
 220
 221         pa_xfree(old);
 222     }
 223
 224     key.dptr = name;
 225     key.dsize = (int) strlen(name);
 226
 227     data.dptr = (void*) &entry;
 228     data.dsize = sizeof(entry);
 229
 230     pa_log_info("Storing volume/mute for device %s.", name);
 231
 232     gdbm_store(u->gdbm_file, key, data, GDBM_REPLACE);
 233
 234     pa_xfree(name);
 235
 236     trigger_save(u);
 237 }
 238
 239 static pa_hook_result_t sink_fixate_hook_callback(pa_core *c, pa_sink_new_data *new_data, struct userdata *u) {
 240     char *name;
 241     struct entry *e;
 242
 243     pa_assert(new_data);
 244
 245     name = pa_sprintf_malloc("sink:%s", new_data->name);
 246
 247     if ((e = read_entry(u, name))) {
 248
 249         if (u->restore_volume) {
 250
 251             if (!new_data->volume_is_set) {
 252                 pa_log_info("Restoring volume for sink %s.", new_data->name);
 253                 pa_sink_new_data_set_volume(new_data, pa_cvolume_remap(&e->volume, &e->channel_map, &new_data->channel_map));
 254             } else
 255                 pa_log_debug("Not restoring volume for sink %s, because already set.", new_data->name);
 256
 257         }
 258
 259         if (u->restore_muted) {
 260
 261             if (!new_data->muted_is_set) {
 262                 pa_log_info("Restoring mute state for sink %s.", new_data->name);
 263                 pa_sink_new_data_set_muted(new_data, e->muted);
 264             } else
 265                 pa_log_debug("Not restoring mute state for sink %s, because already set.", new_data->name);
 266         }
 267
 268         pa_xfree(e);
 269     }
 270
 271     pa_xfree(name);
 272
 273     return PA_HOOK_OK;
 274 }
 275
 276 static pa_hook_result_t source_fixate_hook_callback(pa_core *c, pa_source_new_data *new_data, struct userdata *u) {
 277     char *name;
 278     struct entry *e;
 279
 280     pa_assert(new_data);
 281
 282     name = pa_sprintf_malloc("source:%s", new_data->name);
 283
 284     if ((e = read_entry(u, name))) {
 285
 286         if (u->restore_volume) {
 287
 288             if (!new_data->volume_is_set) {
 289                 pa_log_info("Restoring volume for source %s.", new_data->name);
 290                 pa_source_new_data_set_volume(new_data, pa_cvolume_remap(&e->volume, &e->channel_map, &new_data->channel_map));
 291             } else
 292                 pa_log_debug("Not restoring volume for source %s, because already set.", new_data->name);
 293         }
 294
 295         if (u->restore_muted) {
 296
 297             if (!new_data->muted_is_set) {
 298                 pa_log_info("Restoring mute state for source %s.", new_data->name);
 299                 pa_source_new_data_set_muted(new_data, e->muted);
 300             } else
 301                 pa_log_debug("Not restoring mute state for source %s, because already set.", new_data->name);
 302         }
 303
 304         pa_xfree(e);
 305     }
 306
 307     pa_xfree(name);
 308
 309     return PA_HOOK_OK;
 310 }
 311
 312 int pa__init(pa_module*m) {
 313     pa_modargs *ma = NULL;
 314     struct userdata *u;
 315     char *fname, *fn;
 316     pa_sink *sink;
 317     pa_source *source;
 318     uint32_t idx;
 319     pa_bool_t restore_volume = TRUE, restore_muted = TRUE;
 320     int gdbm_cache_size;
 321
 322     pa_assert(m);
 323
 324     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 325         pa_log("Failed to parse module arguments");
 326         goto fail;
 327     }
 328
 329     if (pa_modargs_get_value_boolean(ma, "restore_volume", &restore_volume) < 0 ||
 330         pa_modargs_get_value_boolean(ma, "restore_muted", &restore_muted) < 0) {
 331         pa_log("restore_volume= and restore_muted= expect boolean arguments");
 332         goto fail;
 333     }
 334
 335     if (!restore_muted && !restore_volume)
 336         pa_log_warn("Neither restoring volume nor restoring muted enabled!");
 337
 338     m->userdata = u = pa_xnew(struct userdata, 1);
 339     u->core = m->core;
 340     u->module = m;
 341     u->save_time_event = NULL;
 342     u->restore_volume = restore_volume;
 343     u->restore_muted = restore_muted;
 344     u->gdbm_file = NULL;
 345
 346     u->subscription = pa_subscription_new(m->core, PA_SUBSCRIPTION_MASK_SINK|PA_SUBSCRIPTION_MASK_SOURCE, subscribe_callback, u);
 347
 348     if (restore_muted || restore_volume) {
 349         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);
 350         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);
 351     }
 352
 353     /* We include the host identifier in the file name because gdbm
 354      * files are CPU dependant, and we don't want things to go wrong
 355      * if we are on a multiarch system. */
 356
 357     fn = pa_sprintf_malloc("device-volumes."CANONICAL_HOST".gdbm");
 358     fname = pa_state_path(fn, TRUE);
 359     pa_xfree(fn);
 360
 361     if (!fname)
 362         goto fail;
 363
 364     if (!(u->gdbm_file = gdbm_open(fname, 0, GDBM_WRCREAT|GDBM_NOLOCK, 0600, NULL))) {
 365         pa_log("Failed to open volume database '%s': %s", fname, gdbm_strerror(gdbm_errno));
 366         pa_xfree(fname);
 367         goto fail;
 368     }
 369
 370     /* By default the cache of gdbm is rather large, let's reduce it a bit to save memory */
 371     gdbm_cache_size = 10;
 372     gdbm_setopt(u->gdbm_file, GDBM_CACHESIZE, &gdbm_cache_size, sizeof(gdbm_cache_size));
 373
 374     pa_log_info("Sucessfully opened database file '%s'.", fname);
 375     pa_xfree(fname);
 376
 377     for (sink = pa_idxset_first(m->core->sinks, &idx); sink; sink = pa_idxset_next(m->core->sinks, &idx))
 378         subscribe_callback(m->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_NEW, sink->index, u);
 379
 380     for (source = pa_idxset_first(m->core->sources, &idx); source; source = pa_idxset_next(m->core->sources, &idx))
 381         subscribe_callback(m->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_NEW, source->index, u);
 382
 383     pa_modargs_free(ma);
 384     return 0;
 385
 386 fail:
 387     pa__done(m);
 388
 389     if (ma)
 390         pa_modargs_free(ma);
 391
 392     return  -1;
 393 }
 394
 395 void pa__done(pa_module*m) {
 396     struct userdata* u;
 397
 398     pa_assert(m);
 399
 400     if (!(u = m->userdata))
 401         return;
 402
 403     if (u->subscription)
 404         pa_subscription_free(u->subscription);
 405
 406     if (u->sink_fixate_hook_slot)
 407         pa_hook_slot_free(u->sink_fixate_hook_slot);
 408     if (u->source_fixate_hook_slot)
 409         pa_hook_slot_free(u->source_fixate_hook_slot);
 410
 411     if (u->save_time_event)
 412         u->core->mainloop->time_free(u->save_time_event);
 413
 414     if (u->gdbm_file)
 415         gdbm_close(u->gdbm_file);
 416
 417     pa_xfree(u);
 418 }