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add new module-augment-properties module for augmenting properties from .desktop files
This commit is contained in:
Lennart Poettering
parent
d6201cfc3a
commit
9f39a44488
4 changed files with 301 additions and 3 deletions
286
src/modules/module-augment-properties.c
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286
src/modules/module-augment-properties.c
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/***
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This file is part of PulseAudio.
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Copyright 2009 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <sys/stat.h>
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#include <pulse/xmalloc.h>
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#include <pulse/volume.h>
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#include <pulse/channelmap.h>
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#include <pulsecore/core-error.h>
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#include <pulsecore/module.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/modargs.h>
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#include <pulsecore/log.h>
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#include <pulsecore/client.h>
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#include <pulsecore/conf-parser.h>
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#include "module-augment-properties-symdef.h"
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PA_MODULE_AUTHOR("Lennart Poettering");
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PA_MODULE_DESCRIPTION("Augment the property sets of streams with additional static information");
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PA_MODULE_VERSION(PACKAGE_VERSION);
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PA_MODULE_LOAD_ONCE(TRUE);
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#define STAT_INTERVAL 30
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#define MAX_CACHE_SIZE 50
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static const char* const valid_modargs[] = {
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NULL
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};
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struct rule {
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time_t timestamp;
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pa_bool_t good;
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time_t mtime;
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char *process_name;
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char *application_name;
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char *icon_name;
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pa_proplist *proplist;
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};
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struct userdata {
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pa_hashmap *cache;
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pa_hook_slot *client_new_slot, *client_proplist_changed_slot;
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};
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static void rule_free(struct rule *r) {
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pa_assert(r);
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pa_xfree(r->process_name);
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pa_xfree(r->application_name);
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pa_xfree(r->icon_name);
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if (r->proplist)
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pa_proplist_free(r->proplist);
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pa_xfree(r);
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}
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static int parse_properties(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
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struct rule *r = userdata;
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pa_proplist *n;
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if (!(n = pa_proplist_from_string(rvalue)))
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return -1;
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if (r->proplist) {
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pa_proplist_update(r->proplist, PA_UPDATE_MERGE, n);
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pa_proplist_free(n);
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} else
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r->proplist = n;
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return 0;
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}
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static int check_type(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
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return pa_streq(rvalue, "Application") ? 0 : -1;
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}
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static int catch_all(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
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return 0;
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}
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static void update_rule(struct rule *r) {
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char *fn;
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struct stat st;
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static pa_config_item table[] = {
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{ "Name", pa_config_parse_string, NULL, "Desktop Entry" },
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{ "Icon", pa_config_parse_string, NULL, "Desktop Entry" },
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{ "Type", check_type, NULL, "Desktop Entry" },
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{ "X-PulseAudio-Properties", parse_properties, NULL, "Desktop Entry" },
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{ NULL, catch_all, NULL, NULL },
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{ NULL, NULL, NULL, NULL },
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};
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pa_assert(r);
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fn = pa_sprintf_malloc(DESKTOPFILEDIR PA_PATH_SEP "%s.desktop", r->process_name);
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if (stat(fn, &st) < 0) {
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r->good = FALSE;
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pa_xfree(fn);
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return;
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}
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if (r->good && st.st_mtime == r->mtime) {
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pa_xfree(fn);
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return;
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}
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r->good = TRUE;
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r->mtime = st.st_mtime;
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pa_xfree(r->application_name);
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pa_xfree(r->icon_name);
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r->application_name = r->icon_name = NULL;
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if (r->proplist)
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pa_proplist_clear(r->proplist);
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table[0].data = &r->application_name;
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table[1].data = &r->icon_name;
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if (pa_config_parse(fn, NULL, table, r) < 0)
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pa_log_warn("Failed to parse .desktop file %s.", fn);
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pa_xfree(fn);
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}
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static void apply_rule(struct rule *r, pa_proplist *p) {
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pa_assert(r);
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pa_assert(p);
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if (!r->good)
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return;
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if (r->icon_name)
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if (!pa_proplist_contains(p, PA_PROP_APPLICATION_ICON_NAME))
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pa_proplist_sets(p, PA_PROP_APPLICATION_ICON_NAME, r->icon_name);
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if (r->application_name) {
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const char *t;
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t = pa_proplist_gets(p, PA_PROP_APPLICATION_NAME);
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if (!t || pa_streq(t, r->process_name))
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pa_proplist_sets(p, PA_PROP_APPLICATION_NAME, r->application_name);
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}
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if (r->proplist)
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pa_proplist_update(p, PA_UPDATE_MERGE, r->proplist);
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}
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static void make_room(pa_hashmap *cache) {
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pa_assert(cache);
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while (pa_hashmap_size(cache) >= MAX_CACHE_SIZE) {
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struct rule *r;
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pa_assert_se(r = pa_hashmap_steal_first(cache));
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rule_free(r);
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}
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}
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static pa_hook_result_t process(struct userdata *u, pa_proplist *p) {
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struct rule *r;
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time_t now;
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const char *pn;
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pa_assert(u);
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pa_assert(p);
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if (!(pn = pa_proplist_gets(p, PA_PROP_APPLICATION_PROCESS_BINARY)))
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return PA_HOOK_OK;
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if (*pn == '.' || strchr(pn, '/'))
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return PA_HOOK_OK;
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time(&now);
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if ((r = pa_hashmap_get(u->cache, pn))) {
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if (now-r->timestamp > STAT_INTERVAL) {
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r->timestamp = now;
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update_rule(r);
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}
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} else {
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make_room(u->cache);
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r = pa_xnew0(struct rule, 1);
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r->process_name = pa_xstrdup(pn);
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r->timestamp = now;
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pa_hashmap_put(u->cache, r->process_name, r);
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update_rule(r);
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}
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apply_rule(r, p);
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return PA_HOOK_OK;
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}
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static pa_hook_result_t client_new_cb(pa_core *core, pa_client_new_data *data, struct userdata *u) {
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pa_core_assert_ref(core);
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pa_assert(data);
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pa_assert(u);
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return process(u, data->proplist);
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}
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static pa_hook_result_t client_proplist_changed_cb(pa_core *core, pa_client *client, struct userdata *u) {
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pa_core_assert_ref(core);
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pa_assert(client);
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pa_assert(u);
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return process(u, client->proplist);
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}
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int pa__init(pa_module*m) {
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pa_modargs *ma = NULL;
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struct userdata *u;
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pa_assert(m);
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if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
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pa_log("Failed to parse module arguments");
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goto fail;
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}
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m->userdata = u = pa_xnew(struct userdata, 1);
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u->cache = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
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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);
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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);
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pa_modargs_free(ma);
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return 0;
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fail:
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pa__done(m);
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if (ma)
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pa_modargs_free(ma);
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return -1;
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}
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void pa__done(pa_module*m) {
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struct userdata* u;
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pa_assert(m);
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if (!(u = m->userdata))
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return;
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if (u->client_new_slot)
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pa_hook_slot_free(u->client_new_slot);
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if (u->client_proplist_changed_slot)
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pa_hook_slot_free(u->client_proplist_changed_slot);
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if (u->cache) {
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struct rule *r;
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while ((r = pa_hashmap_steal_first(u->cache)))
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rule_free(r);
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pa_hashmap_free(u->cache, NULL, NULL);
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}
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pa_xfree(u);
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}
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