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/***
This file is part of PulseAudio.
Copyright 2006-2008 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 <errno.h>
#include <stdio.h>
#include <pulse/rtclock.h>
#include <pulse/timeval.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core-util.h>
#include <pulsecore/module.h>
#include <pulsecore/log.h>
#include <pulsecore/namereg.h>
#include <pulsecore/core-error.h>
#include "module-default-device-restore-symdef.h"
PA_MODULE_AUTHOR("Lennart Poettering");
PA_MODULE_DESCRIPTION("Automatically restore the default sink and source");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(true);
#define SAVE_INTERVAL (5 * PA_USEC_PER_SEC)
struct userdata {
pa_core *core;
pa_subscription *subscription;
pa_time_event *time_event;
char *sink_filename, *source_filename;
bool modified;
};
static void load(struct userdata *u) {
FILE *f;
/* We never overwrite manually configured settings */
if (u->core->default_sink)
pa_log_info("Manually configured default sink, not overwriting.");
else if ((f = pa_fopen_cloexec(u->sink_filename, "r"))) {
char ln[256] = "";
pa_sink *s;
if (fgets(ln, sizeof(ln)-1, f))
pa_strip_nl(ln);
fclose(f);
if (!ln[0])
pa_log_info("No previous default sink setting, ignoring.");
else if ((s = pa_namereg_get(u->core, ln, PA_NAMEREG_SINK))) {
pa_namereg_set_default_sink(u->core, s);
pa_log_info("Restored default sink '%s'.", ln);
} else
pa_log_info("Saved default sink '%s' not existent, not restoring default sink setting.", ln);
} else if (errno != ENOENT)
pa_log("Failed to load default sink: %s", pa_cstrerror(errno));
if (u->core->default_source)
pa_log_info("Manually configured default source, not overwriting.");
else if ((f = pa_fopen_cloexec(u->source_filename, "r"))) {
char ln[256] = "";
pa_source *s;
if (fgets(ln, sizeof(ln)-1, f))
pa_strip_nl(ln);
fclose(f);
if (!ln[0])
pa_log_info("No previous default source setting, ignoring.");
else if ((s = pa_namereg_get(u->core, ln, PA_NAMEREG_SOURCE))) {
pa_namereg_set_default_source(u->core, s);
pa_log_info("Restored default source '%s'.", ln);
} else
pa_log_info("Saved default source '%s' not existent, not restoring default source setting.", ln);
} else if (errno != ENOENT)
pa_log("Failed to load default sink: %s", pa_cstrerror(errno));
}
static void save(struct userdata *u) {
FILE *f;
if (!u->modified)
return;
if (u->sink_filename) {
if ((f = pa_fopen_cloexec(u->sink_filename, "w"))) {
pa_sink *s = pa_namereg_get_default_sink(u->core);
fprintf(f, "%s\n", s ? s->name : "");
fclose(f);
} else
pa_log("Failed to save default sink: %s", pa_cstrerror(errno));
}
if (u->source_filename) {
if ((f = pa_fopen_cloexec(u->source_filename, "w"))) {
pa_source *s = pa_namereg_get_default_source(u->core);
fprintf(f, "%s\n", s ? s->name : "");
fclose(f);
} else
pa_log("Failed to save default source: %s", pa_cstrerror(errno));
}
u->modified = false;
}
static void time_cb(pa_mainloop_api *a, pa_time_event *e, const struct timeval *t, void *userdata) {
struct userdata *u = userdata;
pa_assert(u);
save(u);
if (u->time_event) {
u->core->mainloop->time_free(u->time_event);
u->time_event = NULL;
}
}
static void subscribe_cb(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
struct userdata *u = userdata;
pa_assert(u);
u->modified = true;
if (!u->time_event)
u->time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + SAVE_INTERVAL, time_cb, u);
}
int pa__init(pa_module *m) {
struct userdata *u;
pa_assert(m);
m->userdata = u = pa_xnew0(struct userdata, 1);
u->core = m->core;
if (!(u->sink_filename = pa_state_path("default-sink", true)))
goto fail;
if (!(u->source_filename = pa_state_path("default-source", true)))
goto fail;
load(u);
u->subscription = pa_subscription_new(u->core, PA_SUBSCRIPTION_MASK_SERVER, subscribe_cb, u);
return 0;
fail:
pa__done(m);
return -1;
}
void pa__done(pa_module*m) {
struct userdata *u;
pa_assert(m);
if (!(u = m->userdata))
return;
save(u);
if (u->subscription)
pa_subscription_free(u->subscription);
if (u->time_event)
m->core->mainloop->time_free(u->time_event);
pa_xfree(u->sink_filename);
pa_xfree(u->source_filename);
pa_xfree(u);
}
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