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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-02 09:01:46 -05:00
add a card profile restore module
This commit is contained in:
Lennart Poettering
parent
c512ebf4ab
commit
13315a7e4c
2 changed files with 292 additions and 0 deletions
284
src/modules/module-card-restore.c
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284
src/modules/module-card-restore.c
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/***
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This file is part of PulseAudio.
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Copyright 2006-2008 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 <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <gdbm.h>
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#include <pulse/xmalloc.h>
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#include <pulse/volume.h>
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#include <pulse/timeval.h>
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#include <pulse/util.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/core-subscribe.h>
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#include <pulsecore/card.h>
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#include <pulsecore/namereg.h>
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#include "module-card-restore-symdef.h"
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PA_MODULE_AUTHOR("Lennart Poettering");
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PA_MODULE_DESCRIPTION("Automatically restore profile of cards");
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PA_MODULE_VERSION(PACKAGE_VERSION);
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PA_MODULE_LOAD_ONCE(TRUE);
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#define SAVE_INTERVAL 10
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static const char* const valid_modargs[] = {
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NULL
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};
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struct userdata {
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pa_core *core;
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pa_module *module;
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pa_subscription *subscription;
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pa_hook_slot *card_new_hook_slot;
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pa_time_event *save_time_event;
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GDBM_FILE gdbm_file;
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};
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struct entry {
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char profile[PA_NAME_MAX];
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};
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static void save_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *tv, void *userdata) {
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struct userdata *u = userdata;
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pa_assert(a);
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pa_assert(e);
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pa_assert(tv);
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pa_assert(u);
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pa_assert(e == u->save_time_event);
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u->core->mainloop->time_free(u->save_time_event);
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u->save_time_event = NULL;
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gdbm_sync(u->gdbm_file);
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pa_log_info("Synced.");
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}
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static struct entry* read_entry(struct userdata *u, const char *name) {
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datum key, data;
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struct entry *e;
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pa_assert(u);
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pa_assert(name);
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key.dptr = (char*) name;
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key.dsize = (int) strlen(name);
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data = gdbm_fetch(u->gdbm_file, key);
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if (!data.dptr)
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goto fail;
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if (data.dsize != sizeof(struct entry)) {
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pa_log_warn("Database contains entry for card %s of wrong size %lu != %lu", name, (unsigned long) data.dsize, (unsigned long) sizeof(struct entry));
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goto fail;
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}
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e = (struct entry*) data.dptr;
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if (!memchr(e->profile, 0, sizeof(e->profile))) {
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pa_log_warn("Database contains entry for card %s with missing NUL byte in profile name", name);
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goto fail;
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}
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return e;
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fail:
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pa_xfree(data.dptr);
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return NULL;
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}
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static void trigger_save(struct userdata *u) {
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struct timeval tv;
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if (u->save_time_event)
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return;
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pa_gettimeofday(&tv);
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tv.tv_sec += SAVE_INTERVAL;
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u->save_time_event = u->core->mainloop->time_new(u->core->mainloop, &tv, save_time_callback, u);
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}
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static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
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struct userdata *u = userdata;
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struct entry entry, *old;
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datum key, data;
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pa_card *card;
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pa_assert(c);
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pa_assert(u);
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if (t != (PA_SUBSCRIPTION_EVENT_CARD|PA_SUBSCRIPTION_EVENT_NEW) &&
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t != (PA_SUBSCRIPTION_EVENT_CARD|PA_SUBSCRIPTION_EVENT_CHANGE))
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return;
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memset(&entry, 0, sizeof(entry));
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if (!(card = pa_idxset_get_by_index(c->cards, idx)))
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return;
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pa_strlcpy(entry.profile, card->active_profile ? card->active_profile->name : "", sizeof(entry.profile));
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if ((old = read_entry(u, card->name))) {
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if (strncmp(old->profile, entry.profile, sizeof(entry.profile)) == 0) {
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pa_xfree(old);
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return;
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}
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pa_xfree(old);
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}
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key.dptr = card->name;
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key.dsize = (int) strlen(card->name);
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data.dptr = (void*) &entry;
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data.dsize = sizeof(entry);
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pa_log_info("Storing profile for card %s.", card->name);
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gdbm_store(u->gdbm_file, key, data, GDBM_REPLACE);
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trigger_save(u);
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}
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static pa_hook_result_t card_new_hook_callback(pa_core *c, pa_card_new_data *new_data, struct userdata *u) {
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struct entry *e;
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pa_assert(new_data);
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if ((e = read_entry(u, new_data->name)) && e->profile) {
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if (!new_data->active_profile) {
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pa_card_new_data_set_profile(new_data, e->profile);
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pa_log_info("Restoring profile for card %s.", new_data->name);
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} else
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pa_log_debug("Not restoring profile for card %s, because already set.", new_data->name);
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pa_xfree(e);
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}
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return PA_HOOK_OK;
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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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char *fname, *fn;
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pa_card *card;
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uint32_t idx;
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int gdbm_cache_size;
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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->core = m->core;
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u->module = m;
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u->save_time_event = NULL;
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u->gdbm_file = NULL;
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u->subscription = pa_subscription_new(m->core, PA_SUBSCRIPTION_MASK_CARD, subscribe_callback, u);
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u->card_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CARD_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) card_new_hook_callback, u);
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/* We include the host identifier in the file name because gdbm
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* files are CPU dependant, and we don't want things to go wrong
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* if we are on a multiarch system. */
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fn = pa_sprintf_malloc("card-database."CANONICAL_HOST".gdbm");
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fname = pa_state_path(fn, TRUE);
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pa_xfree(fn);
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if (!fname)
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goto fail;
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if (!(u->gdbm_file = gdbm_open(fname, 0, GDBM_WRCREAT|GDBM_NOLOCK, 0600, NULL))) {
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pa_log("Failed to open volume database '%s': %s", fname, gdbm_strerror(gdbm_errno));
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pa_xfree(fname);
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goto fail;
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}
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/* By default the cache of gdbm is rather large, let's reduce it a bit to save memory */
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gdbm_cache_size = 10;
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gdbm_setopt(u->gdbm_file, GDBM_CACHESIZE, &gdbm_cache_size, sizeof(gdbm_cache_size));
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pa_log_info("Sucessfully opened database file '%s'.", fname);
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pa_xfree(fname);
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for (card = pa_idxset_first(m->core->cards, &idx); card; card = pa_idxset_next(m->core->cards, &idx))
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subscribe_callback(m->core, PA_SUBSCRIPTION_EVENT_CARD|PA_SUBSCRIPTION_EVENT_NEW, card->index, 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->subscription)
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pa_subscription_free(u->subscription);
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if (u->card_new_hook_slot)
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pa_hook_slot_free(u->card_new_hook_slot);
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if (u->save_time_event)
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u->core->mainloop->time_free(u->save_time_event);
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if (u->gdbm_file)
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gdbm_close(u->gdbm_file);
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pa_xfree(u);
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}
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