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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 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 <unistd.h>
  29 #include <assert.h>
  30 #include <string.h>
  31 #include <errno.h>
  32 #include <sys/types.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <ctype.h>
  36
  37 #include <pulse/xmalloc.h>
  38
  39 #include <pulsecore/core-error.h>
  40 #include <pulsecore/module.h>
  41 #include <pulsecore/core-util.h>
  42 #include <pulsecore/modargs.h>
  43 #include <pulsecore/log.h>
  44 #include <pulsecore/core-subscribe.h>
  45 #include <pulsecore/sink-input.h>
  46 #include <pulsecore/source-output.h>
  47 #include <pulsecore/core-util.h>
  48 #include <pulsecore/namereg.h>
  49 #include <pulse/volume.h>
  50
  51 #include "module-volume-restore-symdef.h"
  52
  53 PA_MODULE_AUTHOR("Lennart Poettering")
  54 PA_MODULE_DESCRIPTION("Automatically restore the volume and the devices of streams")
  55 PA_MODULE_USAGE("table=<filename>")
  56 PA_MODULE_VERSION(PACKAGE_VERSION)
  57
  58 #define WHITESPACE "\n\r \t"
  59
  60 #define DEFAULT_VOLUME_TABLE_FILE "volume-restore.table"
  61
  62 static const char* const valid_modargs[] = {
  63     "table",
  64     NULL,
  65 };
  66
  67 struct rule {
  68     char* name;
  69     int volume_is_set;
  70     pa_cvolume volume;
  71     char *sink;
  72     char *source;
  73 };
  74
  75 struct userdata {
  76     pa_hashmap *hashmap;
  77     pa_subscription *subscription;
  78     pa_hook_slot *sink_input_hook_slot, *source_output_hook_slot;
  79     int modified;
  80     char *table_file;
  81 };
  82
  83 static pa_cvolume* parse_volume(const char *s, pa_cvolume *v) {
  84     char *p;
  85     long k;
  86     unsigned i;
  87
  88     assert(s);
  89     assert(v);
  90
  91     if (!isdigit(*s))
  92         return NULL;
  93
  94     k = strtol(s, &p, 0);
  95     if (k <= 0 || k > PA_CHANNELS_MAX)
  96         return NULL;
  97
  98     v->channels = (unsigned) k;
  99
 100     for (i = 0; i < v->channels; i++) {
 101         p += strspn(p, WHITESPACE);
 102
 103         if (!isdigit(*p))
 104             return NULL;
 105
 106         k = strtol(p, &p, 0);
 107
 108         if (k < PA_VOLUME_MUTED)
 109             return NULL;
 110
 111         v->values[i] = (pa_volume_t) k;
 112     }
 113
 114     if (*p != 0)
 115         return NULL;
 116
 117     return v;
 118 }
 119
 120 static int load_rules(struct userdata *u) {
 121     FILE *f;
 122     int n = 0;
 123     int ret = -1;
 124     char buf_name[256], buf_volume[256], buf_sink[256], buf_source[256];
 125     char *ln = buf_name;
 126
 127     f = u->table_file ?
 128         fopen(u->table_file, "r") :
 129         pa_open_config_file(NULL, DEFAULT_VOLUME_TABLE_FILE, NULL, &u->table_file, "r");
 130
 131     if (!f) {
 132         if (errno == ENOENT) {
 133             pa_log_info("starting with empty ruleset.");
 134             ret = 0;
 135         } else
 136             pa_log("failed to open file '%s': %s", u->table_file, pa_cstrerror(errno));
 137
 138         goto finish;
 139     }
 140
 141     pa_lock_fd(fileno(f), 1);
 142
 143     while (!feof(f)) {
 144         struct rule *rule;
 145         pa_cvolume v;
 146         int v_is_set;
 147
 148         if (!fgets(ln, sizeof(buf_name), f))
 149             break;
 150
 151         n++;
 152
 153         pa_strip_nl(ln);
 154
 155         if (ln[0] == '#')
 156             continue;
 157
 158         if (ln == buf_name) {
 159             ln = buf_volume;
 160             continue;
 161         }
 162
 163         if (ln == buf_volume) {
 164             ln = buf_sink;
 165             continue;
 166         }
 167
 168         if (ln == buf_sink) {
 169             ln = buf_source;
 170             continue;
 171         }
 172
 173         assert(ln == buf_source);
 174
 175         if (buf_volume[0]) {
 176             if (!parse_volume(buf_volume, &v)) {
 177                 pa_log("parse failure in %s:%u, stopping parsing", u->table_file, n);
 178                 goto finish;
 179             }
 180
 181             v_is_set = 1;
 182         } else
 183             v_is_set = 0;
 184
 185         ln = buf_name;
 186
 187         if (pa_hashmap_get(u->hashmap, buf_name)) {
 188             pa_log("double entry in %s:%u, ignoring", u->table_file, n);
 189             continue;
 190         }
 191
 192         rule = pa_xnew(struct rule, 1);
 193         rule->name = pa_xstrdup(buf_name);
 194         if ((rule->volume_is_set = v_is_set))
 195             rule->volume = v;
 196         rule->sink = buf_sink[0] ? pa_xstrdup(buf_sink) : NULL;
 197         rule->source = buf_source[0] ? pa_xstrdup(buf_source) : NULL;
 198
 199         pa_hashmap_put(u->hashmap, rule->name, rule);
 200     }
 201
 202     if (ln != buf_name) {
 203         pa_log("invalid number of lines in %s.", u->table_file);
 204         goto finish;
 205     }
 206
 207     ret = 0;
 208
 209 finish:
 210     if (f) {
 211         pa_lock_fd(fileno(f), 0);
 212         fclose(f);
 213     }
 214
 215     return ret;
 216 }
 217
 218 static int save_rules(struct userdata *u) {
 219     FILE *f;
 220     int ret = -1;
 221     void *state = NULL;
 222     struct rule *rule;
 223
 224     f = u->table_file ?
 225         fopen(u->table_file, "w") :
 226         pa_open_config_file(NULL, DEFAULT_VOLUME_TABLE_FILE, NULL, &u->table_file, "w");
 227
 228     if (!f) {
 229         pa_log("failed to open file '%s': %s", u->table_file, pa_cstrerror(errno));
 230         goto finish;
 231     }
 232
 233     pa_lock_fd(fileno(f), 1);
 234
 235     while ((rule = pa_hashmap_iterate(u->hashmap, &state, NULL))) {
 236         unsigned i;
 237
 238         fprintf(f, "%s\n", rule->name);
 239
 240         if (rule->volume_is_set) {
 241             fprintf(f, "%u", rule->volume.channels);
 242
 243             for (i = 0; i < rule->volume.channels; i++)
 244                 fprintf(f, " %u", rule->volume.values[i]);
 245         }
 246
 247         fprintf(f, "\n%s\n%s\n",
 248                 rule->sink ? rule->sink : "",
 249                 rule->source ? rule->source : "");
 250     }
 251
 252     ret = 0;
 253
 254 finish:
 255     if (f) {
 256         pa_lock_fd(fileno(f), 0);
 257         fclose(f);
 258     }
 259
 260     return ret;
 261 }
 262
 263 static char* client_name(pa_client *c) {
 264     char *t, *e;
 265
 266     if (!c->name || !c->driver)
 267         return NULL;
 268
 269     t = pa_sprintf_malloc("%s$%s", c->driver, c->name);
 270     t[strcspn(t, "\n\r#")] = 0;
 271
 272     if (!*t) {
 273         pa_xfree(t);
 274         return NULL;
 275     }
 276
 277     if ((e = strrchr(t, '('))) {
 278         char *k = e + 1 + strspn(e + 1, "0123456789-");
 279
 280         /* Dirty trick: truncate all trailing parens with numbers in
 281          * between, since they are usually used to identify multiple
 282          * sessions of the same application, which is something we
 283          * explicitly don't want. Besides other stuff this makes xmms
 284          * with esound work properly for us. */
 285
 286         if (*k == ')' && *(k+1) == 0)
 287             *e = 0;
 288     }
 289
 290     return t;
 291 }
 292
 293 static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
 294     struct userdata *u =  userdata;
 295     pa_sink_input *si = NULL;
 296     pa_source_output *so = NULL;
 297     struct rule *r;
 298     char *name;
 299
 300     assert(c);
 301     assert(u);
 302
 303     if (t != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW) &&
 304         t != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE) &&
 305         t != (PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW) &&
 306         t != (PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE))
 307         return;
 308
 309     if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK_INPUT) {
 310         if (!(si = pa_idxset_get_by_index(c->sink_inputs, idx)))
 311             return;
 312
 313         if (!si->client || !(name = client_name(si->client)))
 314             return;
 315     } else {
 316         assert((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT);
 317
 318         if (!(so = pa_idxset_get_by_index(c->source_outputs, idx)))
 319             return;
 320
 321         if (!so->client || !(name = client_name(so->client)))
 322             return;
 323     }
 324
 325     if ((r = pa_hashmap_get(u->hashmap, name))) {
 326         pa_xfree(name);
 327
 328         if (si) {
 329
 330             if (!r->volume_is_set || !pa_cvolume_equal(pa_sink_input_get_volume(si), &r->volume)) {
 331                 pa_log_info("Saving volume for <%s>", r->name);
 332                 r->volume = *pa_sink_input_get_volume(si);
 333                 r->volume_is_set = 1;
 334                 u->modified = 1;
 335             }
 336
 337             if (!r->sink || strcmp(si->sink->name, r->sink) != 0) {
 338                 pa_log_info("Saving sink for <%s>", r->name);
 339                 pa_xfree(r->sink);
 340                 r->sink = pa_xstrdup(si->sink->name);
 341                 u->modified = 1;
 342             }
 343         } else {
 344             assert(so);
 345
 346             if (!r->source || strcmp(so->source->name, r->source) != 0) {
 347                 pa_log_info("Saving source for <%s>", r->name);
 348                 pa_xfree(r->source);
 349                 r->source = pa_xstrdup(so->source->name);
 350                 u->modified = 1;
 351             }
 352         }
 353
 354     } else {
 355         pa_log_info("Creating new entry for <%s>", name);
 356
 357         r = pa_xnew(struct rule, 1);
 358         r->name = name;
 359
 360         if (si) {
 361             r->volume = *pa_sink_input_get_volume(si);
 362             r->volume_is_set = 1;
 363             r->sink = pa_xstrdup(si->sink->name);
 364             r->source = NULL;
 365         } else {
 366             assert(so);
 367             r->volume_is_set = 0;
 368             r->sink = NULL;
 369             r->source = pa_xstrdup(so->source->name);
 370         }
 371
 372         pa_hashmap_put(u->hashmap, r->name, r);
 373         u->modified = 1;
 374     }
 375 }
 376
 377 static pa_hook_result_t sink_input_hook_callback(pa_core *c, pa_sink_input_new_data *data, struct userdata *u) {
 378     struct rule *r;
 379     char *name;
 380
 381     assert(data);
 382
 383     if (!data->client || !(name = client_name(data->client)))
 384         return PA_HOOK_OK;
 385
 386     if ((r = pa_hashmap_get(u->hashmap, name))) {
 387
 388         if (r->volume_is_set && data->sample_spec.channels == r->volume.channels) {
 389             pa_log_info("Restoring volume for <%s>", r->name);
 390             pa_sink_input_new_data_set_volume(data, &r->volume);
 391         }
 392
 393         if (!data->sink && r->sink) {
 394             if ((data->sink = pa_namereg_get(c, r->sink, PA_NAMEREG_SINK, 1)))
 395                 pa_log_info("Restoring sink for <%s>", r->name);
 396         }
 397     }
 398
 399     return PA_HOOK_OK;
 400 }
 401
 402 static pa_hook_result_t source_output_hook_callback(pa_core *c, pa_source_output_new_data *data, struct userdata *u) {
 403     struct rule *r;
 404     char *name;
 405
 406     assert(data);
 407
 408     if (!data->client || !(name = client_name(data->client)))
 409         return PA_HOOK_OK;
 410
 411     if ((r = pa_hashmap_get(u->hashmap, name))) {
 412         if (!data->source && r->source) {
 413             if ((data->source = pa_namereg_get(c, r->source, PA_NAMEREG_SOURCE, 1)))
 414                 pa_log_info("Restoring source for <%s>", r->name);
 415         }
 416     }
 417
 418     return PA_HOOK_OK;
 419 }
 420
 421 int pa__init(pa_core *c, pa_module*m) {
 422     pa_modargs *ma = NULL;
 423     struct userdata *u;
 424
 425     assert(c);
 426     assert(m);
 427
 428     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 429         pa_log("Failed to parse module arguments");
 430         goto fail;
 431     }
 432
 433     u = pa_xnew(struct userdata, 1);
 434     u->hashmap = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 435     u->subscription = NULL;
 436     u->table_file = pa_xstrdup(pa_modargs_get_value(ma, "table", NULL));
 437     u->modified = 0;
 438     u->sink_input_hook_slot = u->source_output_hook_slot = NULL;
 439
 440     m->userdata = u;
 441
 442     if (load_rules(u) < 0)
 443         goto fail;
 444
 445     u->subscription = pa_subscription_new(c, PA_SUBSCRIPTION_MASK_SINK_INPUT|PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT, subscribe_callback, u);
 446     u->sink_input_hook_slot = pa_hook_connect(&c->hook_sink_input_new, (pa_hook_cb_t) sink_input_hook_callback, u);
 447     u->source_output_hook_slot = pa_hook_connect(&c->hook_source_output_new, (pa_hook_cb_t) source_output_hook_callback, u);
 448
 449     pa_modargs_free(ma);
 450     return 0;
 451
 452 fail:
 453     pa__done(c, m);
 454
 455     if (ma)
 456         pa_modargs_free(ma);
 457
 458     return  -1;
 459 }
 460
 461 static void free_func(void *p, void *userdata) {
 462     struct rule *r = p;
 463     assert(r);
 464
 465     pa_xfree(r->name);
 466     pa_xfree(r->sink);
 467     pa_xfree(r->source);
 468     pa_xfree(r);
 469 }
 470
 471 void pa__done(pa_core *c, pa_module*m) {
 472     struct userdata* u;
 473
 474     assert(c);
 475     assert(m);
 476
 477     if (!(u = m->userdata))
 478         return;
 479
 480     if (u->subscription)
 481         pa_subscription_free(u->subscription);
 482
 483     if (u->sink_input_hook_slot)
 484         pa_hook_slot_free(u->sink_input_hook_slot);
 485     if (u->source_output_hook_slot)
 486         pa_hook_slot_free(u->source_output_hook_slot);
 487
 488     if (u->hashmap) {
 489
 490         if (u->modified)
 491             save_rules(u);
 492
 493         pa_hashmap_free(u->hashmap, free_func, NULL);
 494     }
 495
 496     pa_xfree(u->table_file);
 497     pa_xfree(u);
 498 }
 499
 500