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 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
  28 #include <pulse/xmalloc.h>
  29 #include <pulse/volume.h>
  30 #include <pulse/channelmap.h>
  31
  32 #include <pulsecore/core-error.h>
  33 #include <pulsecore/module.h>
  34 #include <pulsecore/core-util.h>
  35 #include <pulsecore/modargs.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/client.h>
  38 #include <pulsecore/conf-parser.h>
  39
  40 #include "module-augment-properties-symdef.h"
  41
  42 PA_MODULE_AUTHOR("Lennart Poettering");
  43 PA_MODULE_DESCRIPTION("Augment the property sets of streams with additional static information");
  44 PA_MODULE_VERSION(PACKAGE_VERSION);
  45 PA_MODULE_LOAD_ONCE(TRUE);
  46
  47 #define STAT_INTERVAL 30
  48 #define MAX_CACHE_SIZE 50
  49
  50 static const char* const valid_modargs[] = {
  51     NULL
  52 };
  53
  54 struct rule {
  55     time_t timestamp;
  56     pa_bool_t good;
  57     time_t mtime;
  58     char *process_name;
  59     char *application_name;
  60     char *icon_name;
  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     if (r->proplist)
  76         pa_proplist_free(r->proplist);
  77     pa_xfree(r);
  78 }
  79
  80 static int parse_properties(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
  81     struct rule *r = userdata;
  82     pa_proplist *n;
  83
  84     if (!(n = pa_proplist_from_string(rvalue)))
  85         return -1;
  86
  87     if (r->proplist) {
  88         pa_proplist_update(r->proplist, PA_UPDATE_MERGE, n);
  89         pa_proplist_free(n);
  90     } else
  91         r->proplist = n;
  92
  93     return 0;
  94 }
  95
  96 static int check_type(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
  97     return pa_streq(rvalue, "Application") ? 0 : -1;
  98 }
  99
 100 static int catch_all(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
 101     return 0;
 102 }
 103
 104 static void update_rule(struct rule *r) {
 105     char *fn;
 106     struct stat st;
 107     static pa_config_item table[] = {
 108         { "Name", pa_config_parse_string,              NULL, "Desktop Entry" },
 109         { "Icon", pa_config_parse_string,              NULL, "Desktop Entry" },
 110         { "Type", check_type,                          NULL, "Desktop Entry" },
 111         { "X-PulseAudio-Properties", parse_properties, NULL, "Desktop Entry" },
 112         { NULL,  catch_all, NULL, NULL },
 113         { NULL, NULL, NULL, NULL },
 114     };
 115
 116     pa_assert(r);
 117     fn = pa_sprintf_malloc(DESKTOPFILEDIR PA_PATH_SEP "%s.desktop", r->process_name);
 118
 119     if (stat(fn, &st) < 0) {
 120         r->good = FALSE;
 121         pa_xfree(fn);
 122         return;
 123     }
 124
 125     if (r->good && st.st_mtime == r->mtime) {
 126         pa_xfree(fn);
 127         return;
 128     }
 129
 130     r->good = TRUE;
 131     r->mtime = st.st_mtime;
 132     pa_xfree(r->application_name);
 133     pa_xfree(r->icon_name);
 134     r->application_name = r->icon_name = NULL;
 135     if (r->proplist)
 136         pa_proplist_clear(r->proplist);
 137
 138     table[0].data = &r->application_name;
 139     table[1].data = &r->icon_name;
 140
 141     if (pa_config_parse(fn, NULL, table, r) < 0)
 142         pa_log_warn("Failed to parse .desktop file %s.", fn);
 143
 144     pa_xfree(fn);
 145 }
 146
 147 static void apply_rule(struct rule *r, pa_proplist *p) {
 148     pa_assert(r);
 149     pa_assert(p);
 150
 151     if (!r->good)
 152         return;
 153
 154     if (r->icon_name)
 155         if (!pa_proplist_contains(p, PA_PROP_APPLICATION_ICON_NAME))
 156             pa_proplist_sets(p, PA_PROP_APPLICATION_ICON_NAME, r->icon_name);
 157
 158     if (r->application_name) {
 159         const char *t;
 160
 161         t = pa_proplist_gets(p, PA_PROP_APPLICATION_NAME);
 162
 163         if (!t || pa_streq(t, r->process_name))
 164             pa_proplist_sets(p, PA_PROP_APPLICATION_NAME, r->application_name);
 165     }
 166
 167     if (r->proplist)
 168         pa_proplist_update(p, PA_UPDATE_MERGE, r->proplist);
 169 }
 170
 171 static void make_room(pa_hashmap *cache) {
 172     pa_assert(cache);
 173
 174     while (pa_hashmap_size(cache) >= MAX_CACHE_SIZE) {
 175         struct rule *r;
 176
 177         pa_assert_se(r = pa_hashmap_steal_first(cache));
 178         rule_free(r);
 179     }
 180 }
 181
 182 static pa_hook_result_t process(struct userdata *u, pa_proplist *p) {
 183     struct rule *r;
 184     time_t now;
 185     const char *pn;
 186
 187     pa_assert(u);
 188     pa_assert(p);
 189
 190     if (!(pn = pa_proplist_gets(p, PA_PROP_APPLICATION_PROCESS_BINARY)))
 191         return PA_HOOK_OK;
 192
 193     if (*pn == '.' || strchr(pn, '/'))
 194         return PA_HOOK_OK;
 195
 196     time(&now);
 197
 198     if ((r = pa_hashmap_get(u->cache, pn))) {
 199         if (now-r->timestamp > STAT_INTERVAL) {
 200             r->timestamp = now;
 201             update_rule(r);
 202         }
 203     } else {
 204         make_room(u->cache);
 205
 206         r = pa_xnew0(struct rule, 1);
 207         r->process_name = pa_xstrdup(pn);
 208         r->timestamp = now;
 209         pa_hashmap_put(u->cache, r->process_name, r);
 210         update_rule(r);
 211     }
 212
 213     apply_rule(r, p);
 214     return PA_HOOK_OK;
 215 }
 216
 217 static pa_hook_result_t client_new_cb(pa_core *core, pa_client_new_data *data, struct userdata *u) {
 218     pa_core_assert_ref(core);
 219     pa_assert(data);
 220     pa_assert(u);
 221
 222     return process(u, data->proplist);
 223 }
 224
 225 static pa_hook_result_t client_proplist_changed_cb(pa_core *core, pa_client *client, struct userdata *u) {
 226     pa_core_assert_ref(core);
 227     pa_assert(client);
 228     pa_assert(u);
 229
 230     return process(u, client->proplist);
 231 }
 232
 233 int pa__init(pa_module *m) {
 234     pa_modargs *ma = NULL;
 235     struct userdata *u;
 236
 237     pa_assert(m);
 238
 239     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 240         pa_log("Failed to parse module arguments");
 241         goto fail;
 242     }
 243
 244     m->userdata = u = pa_xnew(struct userdata, 1);
 245
 246     u->cache = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 247     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);
 248     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);
 249
 250     pa_modargs_free(ma);
 251
 252     return 0;
 253
 254 fail:
 255     pa__done(m);
 256
 257     if (ma)
 258         pa_modargs_free(ma);
 259
 260     return  -1;
 261 }
 262
 263 void pa__done(pa_module *m) {
 264     struct userdata* u;
 265
 266     pa_assert(m);
 267
 268     if (!(u = m->userdata))
 269         return;
 270
 271     if (u->client_new_slot)
 272         pa_hook_slot_free(u->client_new_slot);
 273     if (u->client_proplist_changed_slot)
 274         pa_hook_slot_free(u->client_proplist_changed_slot);
 275
 276     if (u->cache) {
 277         struct rule *r;
 278
 279         while ((r = pa_hashmap_steal_first(u->cache)))
 280             rule_free(r);
 281
 282         pa_hashmap_free(u->cache, NULL, NULL);
 283     }
 284
 285     pa_xfree(u);
 286 }