code.delx.au - pulseaudio/blob - src/modules/module-augment-properties.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2009 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 <sys/stat.h>
  27 #include <dirent.h>
  28 #include <time.h>
  29
  30 #include <pulse/xmalloc.h>
  31
  32 #include <pulsecore/module.h>
  33 #include <pulsecore/core-util.h>
  34 #include <pulsecore/modargs.h>
  35 #include <pulsecore/log.h>
  36 #include <pulsecore/client.h>
  37 #include <pulsecore/conf-parser.h>
  38
  39 #include "module-augment-properties-symdef.h"
  40
  41 PA_MODULE_AUTHOR("Lennart Poettering");
  42 PA_MODULE_DESCRIPTION("Augment the property sets of streams with additional static information");
  43 PA_MODULE_VERSION(PACKAGE_VERSION);
  44 PA_MODULE_LOAD_ONCE(TRUE);
  45
  46 #define STAT_INTERVAL 30
  47 #define MAX_CACHE_SIZE 50
  48
  49 static const char* const valid_modargs[] = {
  50     NULL
  51 };
  52
  53 struct rule {
  54     time_t timestamp;
  55     pa_bool_t good;
  56     time_t mtime;
  57     char *process_name;
  58     char *application_name;
  59     char *icon_name;
  60     char *role;
  61     pa_proplist *proplist;
  62 };
  63
  64 struct userdata {
  65     pa_hashmap *cache;
  66     pa_hook_slot *client_new_slot, *client_proplist_changed_slot;
  67 };
  68
  69 static void rule_free(struct rule *r) {
  70     pa_assert(r);
  71
  72     pa_xfree(r->process_name);
  73     pa_xfree(r->application_name);
  74     pa_xfree(r->icon_name);
  75     pa_xfree(r->role);
  76     if (r->proplist)
  77         pa_proplist_free(r->proplist);
  78     pa_xfree(r);
  79 }
  80
  81 static int parse_properties(
  82         const char *filename,
  83         unsigned line,
  84         const char *section,
  85         const char *lvalue,
  86         const char *rvalue,
  87         void *data,
  88         void *userdata) {
  89
  90     struct rule *r = userdata;
  91     pa_proplist *n;
  92
  93     if (!(n = pa_proplist_from_string(rvalue)))
  94         return -1;
  95
  96     if (r->proplist) {
  97         pa_proplist_update(r->proplist, PA_UPDATE_MERGE, n);
  98         pa_proplist_free(n);
  99     } else
 100         r->proplist = n;
 101
 102     return 0;
 103 }
 104
 105 static int parse_categories(
 106         const char *filename,
 107         unsigned line,
 108         const char *section,
 109         const char *lvalue,
 110         const char *rvalue,
 111         void *data,
 112         void *userdata) {
 113
 114     struct rule *r = userdata;
 115     const char *state = NULL;
 116     char *c;
 117
 118     while ((c = pa_split(rvalue, ";", &state))) {
 119
 120         if (pa_streq(c, "Game")) {
 121             pa_xfree(r->role);
 122             r->role = pa_xstrdup("game");
 123         } else if (pa_streq(c, "Telephony")) {
 124             pa_xfree(r->role);
 125             r->role = pa_xstrdup("phone");
 126         }
 127
 128         pa_xfree(c);
 129     }
 130
 131     return 0;
 132 }
 133
 134 static int check_type(
 135         const char *filename,
 136         unsigned line,
 137         const char *section,
 138         const char *lvalue,
 139         const char *rvalue,
 140         void *data,
 141         void *userdata) {
 142
 143     return pa_streq(rvalue, "Application") ? 0 : -1;
 144 }
 145
 146 static int catch_all(
 147         const char *filename,
 148         unsigned line,
 149         const char *section,
 150         const char *lvalue,
 151         const char *rvalue,
 152         void *data,
 153         void *userdata) {
 154
 155     return 0;
 156 }
 157
 158 static void update_rule(struct rule *r) {
 159     char *fn;
 160     struct stat st;
 161     static pa_config_item table[] = {
 162         { "Name", pa_config_parse_string,              NULL, "Desktop Entry" },
 163         { "Icon", pa_config_parse_string,              NULL, "Desktop Entry" },
 164         { "Type", check_type,                          NULL, "Desktop Entry" },
 165         { "X-PulseAudio-Properties", parse_properties, NULL, "Desktop Entry" },
 166         { "Categories", parse_categories,              NULL, "Desktop Entry" },
 167         { NULL,  catch_all, NULL, NULL },
 168         { NULL, NULL, NULL, NULL },
 169     };
 170     pa_bool_t found = FALSE;
 171
 172     pa_assert(r);
 173     fn = pa_sprintf_malloc(DESKTOPFILEDIR PA_PATH_SEP "%s.desktop", r->process_name);
 174
 175     if (stat(fn, &st) == 0)
 176         found = TRUE;
 177     else {
 178         DIR *desktopfiles_dir;
 179         struct dirent *dir;
 180
 181 #ifdef DT_DIR
 182         /* Let's try a more aggressive search, but only one level */
 183         if ((desktopfiles_dir = opendir(DESKTOPFILEDIR))) {
 184             while ((dir = readdir(desktopfiles_dir))) {
 185                 if (dir->d_type != DT_DIR
 186                     || strcmp(dir->d_name, ".") == 0
 187                     || strcmp(dir->d_name, "..") == 0)
 188                     continue;
 189
 190                 pa_xfree(fn);
 191                 fn = pa_sprintf_malloc(DESKTOPFILEDIR PA_PATH_SEP "%s" PA_PATH_SEP "%s.desktop", dir->d_name, r->process_name);
 192
 193                 if (stat(fn, &st) == 0) {
 194                     found = TRUE;
 195                     break;
 196                 }
 197             }
 198             closedir(desktopfiles_dir);
 199         }
 200 #endif
 201     }
 202     if (!found) {
 203         r->good = FALSE;
 204         pa_xfree(fn);
 205         return;
 206     }
 207
 208     if (r->good) {
 209         if (st.st_mtime == r->mtime) {
 210             /* Theoretically the filename could have changed, but if so
 211                having the same mtime is very unlikely so not worth tracking it in r */
 212             pa_xfree(fn);
 213             return;
 214         }
 215         pa_log_debug("Found %s (which has been updated since we last checked).", fn);
 216     } else
 217         pa_log_debug("Found %s.", fn);
 218
 219     r->good = TRUE;
 220     r->mtime = st.st_mtime;
 221     pa_xfree(r->application_name);
 222     pa_xfree(r->icon_name);
 223     pa_xfree(r->role);
 224     r->application_name = r->icon_name = r->role = NULL;
 225     if (r->proplist)
 226         pa_proplist_clear(r->proplist);
 227
 228     table[0].data = &r->application_name;
 229     table[1].data = &r->icon_name;
 230
 231     if (pa_config_parse(fn, NULL, table, r) < 0)
 232         pa_log_warn("Failed to parse .desktop file %s.", fn);
 233
 234     pa_xfree(fn);
 235 }
 236
 237 static void apply_rule(struct rule *r, pa_proplist *p) {
 238     pa_assert(r);
 239     pa_assert(p);
 240
 241     if (!r->good)
 242         return;
 243
 244     if (r->proplist)
 245         pa_proplist_update(p, PA_UPDATE_MERGE, r->proplist);
 246
 247     if (r->icon_name)
 248         if (!pa_proplist_contains(p, PA_PROP_APPLICATION_ICON_NAME))
 249             pa_proplist_sets(p, PA_PROP_APPLICATION_ICON_NAME, r->icon_name);
 250
 251     if (r->application_name) {
 252         const char *t;
 253
 254         t = pa_proplist_gets(p, PA_PROP_APPLICATION_NAME);
 255
 256         if (!t || pa_streq(t, r->process_name))
 257             pa_proplist_sets(p, PA_PROP_APPLICATION_NAME, r->application_name);
 258     }
 259
 260     if (r->role)
 261         if (!pa_proplist_contains(p, PA_PROP_MEDIA_ROLE))
 262             pa_proplist_sets(p, PA_PROP_MEDIA_ROLE, r->role);
 263 }
 264
 265 static void make_room(pa_hashmap *cache) {
 266     pa_assert(cache);
 267
 268     while (pa_hashmap_size(cache) >= MAX_CACHE_SIZE) {
 269         struct rule *r;
 270
 271         pa_assert_se(r = pa_hashmap_steal_first(cache));
 272         rule_free(r);
 273     }
 274 }
 275
 276 static pa_hook_result_t process(struct userdata *u, pa_proplist *p) {
 277     struct rule *r;
 278     time_t now;
 279     const char *pn;
 280
 281     pa_assert(u);
 282     pa_assert(p);
 283
 284     if (!(pn = pa_proplist_gets(p, PA_PROP_APPLICATION_PROCESS_BINARY)))
 285         return PA_HOOK_OK;
 286
 287     if (*pn == '.' || strchr(pn, '/'))
 288         return PA_HOOK_OK;
 289
 290     time(&now);
 291
 292     pa_log_debug("Looking for .desktop file for %s", pn);
 293
 294     if ((r = pa_hashmap_get(u->cache, pn))) {
 295         if (now-r->timestamp > STAT_INTERVAL) {
 296             r->timestamp = now;
 297             update_rule(r);
 298         }
 299     } else {
 300         make_room(u->cache);
 301
 302         r = pa_xnew0(struct rule, 1);
 303         r->process_name = pa_xstrdup(pn);
 304         r->timestamp = now;
 305         pa_hashmap_put(u->cache, r->process_name, r);
 306         update_rule(r);
 307     }
 308
 309     apply_rule(r, p);
 310     return PA_HOOK_OK;
 311 }
 312
 313 static pa_hook_result_t client_new_cb(pa_core *core, pa_client_new_data *data, struct userdata *u) {
 314     pa_core_assert_ref(core);
 315     pa_assert(data);
 316     pa_assert(u);
 317
 318     return process(u, data->proplist);
 319 }
 320
 321 static pa_hook_result_t client_proplist_changed_cb(pa_core *core, pa_client *client, struct userdata *u) {
 322     pa_core_assert_ref(core);
 323     pa_assert(client);
 324     pa_assert(u);
 325
 326     return process(u, client->proplist);
 327 }
 328
 329 int pa__init(pa_module *m) {
 330     pa_modargs *ma = NULL;
 331     struct userdata *u;
 332
 333     pa_assert(m);
 334
 335     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 336         pa_log("Failed to parse module arguments");
 337         goto fail;
 338     }
 339
 340     m->userdata = u = pa_xnew(struct userdata, 1);
 341
 342     u->cache = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 343     u->client_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CLIENT_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) client_new_cb, u);
 344     u->client_proplist_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CLIENT_PROPLIST_CHANGED], PA_HOOK_EARLY, (pa_hook_cb_t) client_proplist_changed_cb, u);
 345
 346     pa_modargs_free(ma);
 347
 348     return 0;
 349
 350 fail:
 351     pa__done(m);
 352
 353     if (ma)
 354         pa_modargs_free(ma);
 355
 356     return -1;
 357 }
 358
 359 void pa__done(pa_module *m) {
 360     struct userdata* u;
 361
 362     pa_assert(m);
 363
 364     if (!(u = m->userdata))
 365         return;
 366
 367     if (u->client_new_slot)
 368         pa_hook_slot_free(u->client_new_slot);
 369     if (u->client_proplist_changed_slot)
 370         pa_hook_slot_free(u->client_proplist_changed_slot);
 371
 372     if (u->cache) {
 373         struct rule *r;
 374
 375         while ((r = pa_hashmap_steal_first(u->cache)))
 376             rule_free(r);
 377
 378         pa_hashmap_free(u->cache, NULL, NULL);
 379     }
 380
 381     pa_xfree(u);
 382 }