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Diffstat (limited to '')
| -rw-r--r-- | src/modules/module-augment-properties.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/src/modules/module-augment-properties.c b/src/modules/module-augment-properties.c new file mode 100644 index 0000000..1fa1b2b --- /dev/null +++ b/src/modules/module-augment-properties.c @@ -0,0 +1,383 @@ +/*** + This file is part of PulseAudio. + + Copyright 2009 Lennart Poettering + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of the License, + or (at your option) any later version. + + PulseAudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <sys/stat.h> +#include <dirent.h> +#include <time.h> + +#include <pulse/xmalloc.h> + +#include <pulsecore/module.h> +#include <pulsecore/core-util.h> +#include <pulsecore/modargs.h> +#include <pulsecore/log.h> +#include <pulsecore/client.h> +#include <pulsecore/conf-parser.h> + +PA_MODULE_AUTHOR("Lennart Poettering"); +PA_MODULE_DESCRIPTION("Augment the property sets of streams with additional static information"); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(true); + +#define STAT_INTERVAL 30 +#define MAX_CACHE_SIZE 50 + +static const char* const valid_modargs[] = { + NULL +}; + +struct rule { + time_t timestamp; + bool good; + time_t mtime; + char *process_name; + char *application_name; + char *icon_name; + char *role; + pa_proplist *proplist; +}; + +struct userdata { + pa_hashmap *cache; + pa_hook_slot *client_new_slot, *client_proplist_changed_slot; +}; + +static void rule_free(struct rule *r) { + pa_assert(r); + + pa_xfree(r->process_name); + pa_xfree(r->application_name); + pa_xfree(r->icon_name); + pa_xfree(r->role); + if (r->proplist) + pa_proplist_free(r->proplist); + pa_xfree(r); +} + +static int parse_properties(pa_config_parser_state *state) { + struct rule *r; + pa_proplist *n; + + pa_assert(state); + + r = state->userdata; + + if (!(n = pa_proplist_from_string(state->rvalue))) + return -1; + + if (r->proplist) { + pa_proplist_update(r->proplist, PA_UPDATE_MERGE, n); + pa_proplist_free(n); + } else + r->proplist = n; + + return 0; +} + +static int parse_categories(pa_config_parser_state *state) { + struct rule *r; + const char *split_state = NULL; + char *c; + + pa_assert(state); + + r = state->userdata; + + while ((c = pa_split(state->rvalue, ";", &split_state))) { + + if (pa_streq(c, "Game")) { + pa_xfree(r->role); + r->role = pa_xstrdup("game"); + } else if (pa_streq(c, "Telephony")) { + pa_xfree(r->role); + r->role = pa_xstrdup("phone"); + } + + pa_xfree(c); + } + + return 0; +} + +static int check_type(pa_config_parser_state *state) { + pa_assert(state); + + return pa_streq(state->rvalue, "Application") ? 0 : -1; +} + +static int catch_all(pa_config_parser_state *state) { + return 0; +} + +static char * find_desktop_file_in_dir(struct rule *r, const char *desktop_file_dir, struct stat *st) { + char *fn = NULL; + + pa_assert(st); + + fn = pa_sprintf_malloc("%s" PA_PATH_SEP "%s.desktop", desktop_file_dir, r->process_name); + if (stat(fn, st) == 0) + return fn; + + pa_xfree(fn); + +#ifdef DT_DIR + { + DIR *desktopfiles_dir; + struct dirent *dir; + + /* Let's try a more aggressive search, but only one level */ + if ((desktopfiles_dir = opendir(desktop_file_dir))) { + while ((dir = readdir(desktopfiles_dir))) { + if (dir->d_type != DT_DIR + || pa_streq(dir->d_name, ".") + || pa_streq(dir->d_name, "..")) + continue; + + fn = pa_sprintf_malloc("%s" PA_PATH_SEP "%s" PA_PATH_SEP "%s.desktop", desktop_file_dir, dir->d_name, r->process_name); + + if (stat(fn, st) == 0) { + closedir(desktopfiles_dir); + return fn; + } + + pa_xfree(fn); + } + closedir(desktopfiles_dir); + } + } +#endif + + return NULL; +} + +static void update_rule(struct rule *r) { + char *fn = NULL; + struct stat st; + static pa_config_item table[] = { + { "Name", pa_config_parse_string, NULL, "Desktop Entry" }, + { "Icon", pa_config_parse_string, NULL, "Desktop Entry" }, + { "Type", check_type, NULL, "Desktop Entry" }, + { "X-PulseAudio-Properties", parse_properties, NULL, "Desktop Entry" }, + { "Categories", parse_categories, NULL, "Desktop Entry" }, + { NULL, catch_all, NULL, NULL }, + { NULL, NULL, NULL, NULL }, + }; + const char *state = NULL; + const char *xdg_data_dirs = NULL; + char *data_dir = NULL; + char *desktop_file_dir = NULL; + + pa_assert(r); + + if ((xdg_data_dirs = getenv("XDG_DATA_DIRS"))) { + while ((data_dir = pa_split(xdg_data_dirs, ":", &state))) { + desktop_file_dir = pa_sprintf_malloc("%s" PA_PATH_SEP "applications", data_dir); + + pa_xfree(fn); + fn = find_desktop_file_in_dir(r, desktop_file_dir, &st); + + pa_xfree(desktop_file_dir); + pa_xfree(data_dir); + + if (fn) { + break; + } + } + } else { + fn = find_desktop_file_in_dir(r, DESKTOPFILEDIR, &st); + } + + if (!fn) { + r->good = false; + return; + } + + if (r->good) { + if (st.st_mtime == r->mtime) { + /* Theoretically the filename could have changed, but if so + having the same mtime is very unlikely so not worth tracking it in r */ + pa_xfree(fn); + return; + } + pa_log_debug("Found %s (which has been updated since we last checked).", fn); + } else + pa_log_debug("Found %s.", fn); + + r->good = true; + r->mtime = st.st_mtime; + pa_xfree(r->application_name); + pa_xfree(r->icon_name); + pa_xfree(r->role); + r->application_name = r->icon_name = r->role = NULL; + if (r->proplist) + pa_proplist_clear(r->proplist); + + table[0].data = &r->application_name; + table[1].data = &r->icon_name; + + if (pa_config_parse(fn, NULL, table, NULL, false, r) < 0) + pa_log_warn("Failed to parse .desktop file %s.", fn); + + pa_xfree(fn); +} + +static void apply_rule(struct rule *r, pa_proplist *p) { + pa_assert(r); + pa_assert(p); + + if (!r->good) + return; + + if (r->proplist) + pa_proplist_update(p, PA_UPDATE_MERGE, r->proplist); + + if (r->icon_name) + if (!pa_proplist_contains(p, PA_PROP_APPLICATION_ICON_NAME)) + pa_proplist_sets(p, PA_PROP_APPLICATION_ICON_NAME, r->icon_name); + + if (r->application_name) { + const char *t; + + t = pa_proplist_gets(p, PA_PROP_APPLICATION_NAME); + + if (!t || pa_streq(t, r->process_name)) + pa_proplist_sets(p, PA_PROP_APPLICATION_NAME, r->application_name); + } + + if (r->role) + if (!pa_proplist_contains(p, PA_PROP_MEDIA_ROLE)) + pa_proplist_sets(p, PA_PROP_MEDIA_ROLE, r->role); +} + +static void make_room(pa_hashmap *cache) { + pa_assert(cache); + + while (pa_hashmap_size(cache) >= MAX_CACHE_SIZE) { + struct rule *r; + + pa_assert_se(r = pa_hashmap_steal_first(cache)); + rule_free(r); + } +} + +static pa_hook_result_t process(struct userdata *u, pa_proplist *p) { + struct rule *r; + time_t now; + const char *pn; + + pa_assert(u); + pa_assert(p); + + if (!(pn = pa_proplist_gets(p, PA_PROP_APPLICATION_PROCESS_BINARY))) + return PA_HOOK_OK; + + if (*pn == '.' || strchr(pn, '/')) + return PA_HOOK_OK; + + time(&now); + + pa_log_debug("Looking for .desktop file for %s", pn); + + if ((r = pa_hashmap_get(u->cache, pn))) { + if (now-r->timestamp > STAT_INTERVAL) { + r->timestamp = now; + update_rule(r); + } + } else { + make_room(u->cache); + + r = pa_xnew0(struct rule, 1); + r->process_name = pa_xstrdup(pn); + r->timestamp = now; + pa_hashmap_put(u->cache, r->process_name, r); + update_rule(r); + } + + apply_rule(r, p); + return PA_HOOK_OK; +} + +static pa_hook_result_t client_new_cb(pa_core *core, pa_client_new_data *data, struct userdata *u) { + pa_core_assert_ref(core); + pa_assert(data); + pa_assert(u); + + return process(u, data->proplist); +} + +static pa_hook_result_t client_proplist_changed_cb(pa_core *core, pa_client *client, struct userdata *u) { + pa_core_assert_ref(core); + pa_assert(client); + pa_assert(u); + + return process(u, client->proplist); +} + +int pa__init(pa_module *m) { + pa_modargs *ma = NULL; + struct userdata *u; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments"); + goto fail; + } + + m->userdata = u = pa_xnew(struct userdata, 1); + + u->cache = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) rule_free); + 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); + 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); + + pa_modargs_free(ma); + + return 0; + +fail: + pa__done(m); + + if (ma) + pa_modargs_free(ma); + + return -1; +} + +void pa__done(pa_module *m) { + struct userdata* u; + + pa_assert(m); + + if (!(u = m->userdata)) + return; + + if (u->client_new_slot) + pa_hook_slot_free(u->client_new_slot); + if (u->client_proplist_changed_slot) + pa_hook_slot_free(u->client_proplist_changed_slot); + + if (u->cache) + pa_hashmap_free(u->cache); + + pa_xfree(u); +} |