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