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pulseaudio/src/modules/module-stream-restore.c

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/***
This file is part of PulseAudio.
Copyright 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <pulse/xmalloc.h>
#include <pulse/volume.h>
#include <pulse/timeval.h>
#include <pulse/util.h>
#include <pulse/rtclock.h>
#include <pulsecore/core-error.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
#include <pulsecore/core-subscribe.h>
#include <pulsecore/sink-input.h>
#include <pulsecore/source-output.h>
#include <pulsecore/namereg.h>
#include <pulsecore/protocol-native.h>
#include <pulsecore/pstream.h>
#include <pulsecore/pstream-util.h>
#include <pulsecore/database.h>
#include "module-stream-restore-symdef.h"
PA_MODULE_AUTHOR("Lennart Poettering");
PA_MODULE_DESCRIPTION("Automatically restore the volume/mute/device state of streams");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(TRUE);
PA_MODULE_USAGE(
"restore_device=<Save/restore sinks/sources?> "
"restore_volume=<Save/restore volumes?> "
"restore_muted=<Save/restore muted states?> "
"on_hotplug=<When new device becomes available, recheck streams?> "
"on_rescue=<When device becomes unavailable, recheck streams?>");
#define SAVE_INTERVAL (10 * PA_USEC_PER_SEC)
#define IDENTIFICATION_PROPERTY "module-stream-restore.id"
static const char* const valid_modargs[] = {
"restore_device",
"restore_volume",
"restore_muted",
"on_hotplug",
"on_rescue",
NULL
};
struct userdata {
pa_core *core;
pa_module *module;
pa_subscription *subscription;
pa_hook_slot
*sink_input_new_hook_slot,
*sink_input_fixate_hook_slot,
*source_output_new_hook_slot,
*sink_put_hook_slot,
*source_put_hook_slot,
*sink_unlink_hook_slot,
*source_unlink_hook_slot,
*connection_unlink_hook_slot;
pa_time_event *save_time_event;
pa_database* database;
pa_bool_t restore_device:1;
pa_bool_t restore_volume:1;
pa_bool_t restore_muted:1;
pa_bool_t on_hotplug:1;
pa_bool_t on_rescue:1;
pa_native_protocol *protocol;
pa_idxset *subscribed;
};
#define ENTRY_VERSION 3
struct entry {
uint8_t version;
pa_bool_t muted_valid:1, volume_valid:1, device_valid:1, card_valid:1;
pa_bool_t muted:1;
pa_channel_map channel_map;
pa_cvolume volume;
char device[PA_NAME_MAX];
char card[PA_NAME_MAX];
} PA_GCC_PACKED;
enum {
SUBCOMMAND_TEST,
SUBCOMMAND_READ,
SUBCOMMAND_WRITE,
SUBCOMMAND_DELETE,
SUBCOMMAND_SUBSCRIBE,
SUBCOMMAND_EVENT
};
static void save_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *t, void *userdata) {
struct userdata *u = userdata;
pa_assert(a);
pa_assert(e);
pa_assert(u);
pa_assert(e == u->save_time_event);
u->core->mainloop->time_free(u->save_time_event);
u->save_time_event = NULL;
pa_database_sync(u->database);
pa_log_info("Synced.");
}
static char *get_name(pa_proplist *p, const char *prefix) {
const char *r;
char *t;
if (!p)
return NULL;
if ((r = pa_proplist_gets(p, IDENTIFICATION_PROPERTY)))
return pa_xstrdup(r);
if ((r = pa_proplist_gets(p, PA_PROP_MEDIA_ROLE)))
t = pa_sprintf_malloc("%s-by-media-role:%s", prefix, r);
else if ((r = pa_proplist_gets(p, PA_PROP_APPLICATION_ID)))
t = pa_sprintf_malloc("%s-by-application-id:%s", prefix, r);
else if ((r = pa_proplist_gets(p, PA_PROP_APPLICATION_NAME)))
t = pa_sprintf_malloc("%s-by-application-name:%s", prefix, r);
else if ((r = pa_proplist_gets(p, PA_PROP_MEDIA_NAME)))
t = pa_sprintf_malloc("%s-by-media-name:%s", prefix, r);
else
t = pa_sprintf_malloc("%s-fallback:%s", prefix, r);
pa_proplist_sets(p, IDENTIFICATION_PROPERTY, t);
return t;
}
static struct entry* read_entry(struct userdata *u, const char *name) {
pa_datum key, data;
struct entry *e;
pa_assert(u);
pa_assert(name);
key.data = (char*) name;
key.size = strlen(name);
pa_zero(data);
if (!pa_database_get(u->database, &key, &data))
goto fail;
if (data.size != sizeof(struct entry)) {
/* This is probably just a database upgrade, hence let's not
* consider this more than a debug message */
pa_log_debug("Database contains entry for stream %s of wrong size %lu != %lu. Probably due to uprade, ignoring.", name, (unsigned long) data.size, (unsigned long) sizeof(struct entry));
goto fail;
}
e = (struct entry*) data.data;
if (e->version != ENTRY_VERSION) {
pa_log_debug("Version of database entry for stream %s doesn't match our version. Probably due to upgrade, ignoring.", name);
goto fail;
}
if (!memchr(e->device, 0, sizeof(e->device))) {
pa_log_warn("Database contains entry for stream %s with missing NUL byte in device name", name);
goto fail;
}
if (!memchr(e->card, 0, sizeof(e->card))) {
pa_log_warn("Database contains entry for stream %s with missing NUL byte in card name", name);
goto fail;
}
if (e->device_valid && !pa_namereg_is_valid_name(e->device)) {
pa_log_warn("Invalid device name stored in database for stream %s", name);
goto fail;
}
if (e->card_valid && !pa_namereg_is_valid_name(e->card)) {
pa_log_warn("Invalid card name stored in database for stream %s", name);
goto fail;
}
if (e->volume_valid && !pa_channel_map_valid(&e->channel_map)) {
pa_log_warn("Invalid channel map stored in database for stream %s", name);
goto fail;
}
if (e->volume_valid && (!pa_cvolume_valid(&e->volume) || !pa_cvolume_compatible_with_channel_map(&e->volume, &e->channel_map))) {
pa_log_warn("Invalid volume stored in database for stream %s", name);
goto fail;
}
return e;
fail:
pa_datum_free(&data);
return NULL;
}
static void trigger_save(struct userdata *u) {
pa_native_connection *c;
uint32_t idx;
for (c = pa_idxset_first(u->subscribed, &idx); c; c = pa_idxset_next(u->subscribed, &idx)) {
pa_tagstruct *t;
t = pa_tagstruct_new(NULL, 0);
pa_tagstruct_putu32(t, PA_COMMAND_EXTENSION);
pa_tagstruct_putu32(t, 0);
pa_tagstruct_putu32(t, u->module->index);
pa_tagstruct_puts(t, u->module->name);
pa_tagstruct_putu32(t, SUBCOMMAND_EVENT);
pa_pstream_send_tagstruct(pa_native_connection_get_pstream(c), t);
}
if (u->save_time_event)
return;
u->save_time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + SAVE_INTERVAL, save_time_callback, u);
}
static pa_bool_t entries_equal(const struct entry *a, const struct entry *b) {
pa_cvolume t;
pa_assert(a);
pa_assert(b);
if (a->device_valid != b->device_valid ||
(a->device_valid && strncmp(a->device, b->device, sizeof(a->device))))
return FALSE;
if (a->card_valid != b->card_valid ||
(a->card_valid && strncmp(a->card, b->card, sizeof(a->card))))
return FALSE;
if (a->muted_valid != b->muted_valid ||
(a->muted_valid && (a->muted != b->muted)))
return FALSE;
t = b->volume;
if (a->volume_valid != b->volume_valid ||
(a->volume_valid && !pa_cvolume_equal(pa_cvolume_remap(&t, &b->channel_map, &a->channel_map), &a->volume)))
return FALSE;
return TRUE;
}
static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
struct userdata *u = userdata;
struct entry entry, *old;
char *name;
pa_datum key, data;
pa_assert(c);
pa_assert(u);
if (t != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW) &&
t != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE) &&
t != (PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW) &&
t != (PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE))
return;
pa_zero(entry);
entry.version = ENTRY_VERSION;
if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK_INPUT) {
pa_sink_input *sink_input;
if (!(sink_input = pa_idxset_get_by_index(c->sink_inputs, idx)))
return;
if (!(name = get_name(sink_input->proplist, "sink-input")))
return;
if ((old = read_entry(u, name)))
entry = *old;
if (sink_input->save_volume) {
entry.channel_map = sink_input->channel_map;
pa_sink_input_get_volume(sink_input, &entry.volume, FALSE);
entry.volume_valid = TRUE;
}
if (sink_input->save_muted) {
entry.muted = pa_sink_input_get_mute(sink_input);
entry.muted_valid = TRUE;
}
if (sink_input->save_sink) {
pa_strlcpy(entry.device, sink_input->sink->name, sizeof(entry.device));
entry.device_valid = TRUE;
if (sink_input->sink->card) {
pa_strlcpy(entry.card, sink_input->sink->card->name, sizeof(entry.card));
entry.card_valid = TRUE;
}
}
} else {
pa_source_output *source_output;
pa_assert((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT);
if (!(source_output = pa_idxset_get_by_index(c->source_outputs, idx)))
return;
if (!(name = get_name(source_output->proplist, "source-output")))
return;
if ((old = read_entry(u, name)))
entry = *old;
if (source_output->save_source) {
pa_strlcpy(entry.device, source_output->source->name, sizeof(entry.device));
entry.device_valid = source_output->save_source;
if (source_output->source->card) {
pa_strlcpy(entry.card, source_output->source->card->name, sizeof(entry.card));
entry.card_valid = TRUE;
}
}
}
if (old) {
if (entries_equal(old, &entry)) {
pa_xfree(old);
pa_xfree(name);
return;
}
pa_xfree(old);
}
key.data = name;
key.size = strlen(name);
data.data = &entry;
data.size = sizeof(entry);
pa_log_info("Storing volume/mute/device for stream %s.", name);
pa_database_set(u->database, &key, &data, TRUE);
pa_xfree(name);
trigger_save(u);
}
static pa_hook_result_t sink_input_new_hook_callback(pa_core *c, pa_sink_input_new_data *new_data, struct userdata *u) {
char *name;
struct entry *e;
pa_assert(c);
pa_assert(new_data);
pa_assert(u);
pa_assert(u->restore_device);
if (!(name = get_name(new_data->proplist, "sink-input")))
return PA_HOOK_OK;
if (new_data->sink)
pa_log_debug("Not restoring device for stream %s, because already set.", name);
else if ((e = read_entry(u, name))) {
pa_sink *s = NULL;
if (e->device_valid)
s = pa_namereg_get(c, e->device, PA_NAMEREG_SINK);
if (!s && e->card_valid) {
pa_card *card;
if ((card = pa_namereg_get(c, e->card, PA_NAMEREG_CARD)))
s = pa_idxset_first(card->sinks, NULL);
}
/* It might happen that a stream and a sink are set up at the
same time, in which case we want to make sure we don't
interfere with that */
if (s && PA_SINK_IS_LINKED(pa_sink_get_state(s))) {
pa_log_info("Restoring device for stream %s.", name);
new_data->sink = s;
new_data->save_sink = TRUE;
}
pa_xfree(e);
}
pa_xfree(name);
return PA_HOOK_OK;
}
static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *c, pa_sink_input_new_data *new_data, struct userdata *u) {
char *name;
struct entry *e;
pa_assert(c);
pa_assert(new_data);
pa_assert(u);
pa_assert(u->restore_volume || u->restore_muted);
if (!(name = get_name(new_data->proplist, "sink-input")))
return PA_HOOK_OK;
if ((e = read_entry(u, name))) {
if (u->restore_volume && e->volume_valid) {
if (!new_data->volume_is_set) {
pa_cvolume v;
pa_log_info("Restoring volume for sink input %s.", name);
v = e->volume;
pa_cvolume_remap(&v, &e->channel_map, &new_data->channel_map);
pa_sink_input_new_data_set_volume(new_data, &v);
new_data->volume_is_absolute = FALSE;
new_data->save_volume = TRUE;
} else
pa_log_debug("Not restoring volume for sink input %s, because already set.", name);
}
if (u->restore_muted && e->muted_valid) {
if (!new_data->muted_is_set) {
pa_log_info("Restoring mute state for sink input %s.", name);
pa_sink_input_new_data_set_muted(new_data, e->muted);
new_data->save_muted = TRUE;
} else
pa_log_debug("Not restoring mute state for sink input %s, because already set.", name);
}
pa_xfree(e);
}
pa_xfree(name);
return PA_HOOK_OK;
}
static pa_hook_result_t source_output_new_hook_callback(pa_core *c, pa_source_output_new_data *new_data, struct userdata *u) {
char *name;
struct entry *e;
pa_assert(c);
pa_assert(new_data);
pa_assert(u);
pa_assert(u->restore_device);
if (new_data->direct_on_input)
return PA_HOOK_OK;
if (!(name = get_name(new_data->proplist, "source-output")))
return PA_HOOK_OK;
if (new_data->source)
pa_log_debug("Not restoring device for stream %s, because already set", name);
else if ((e = read_entry(u, name))) {
pa_source *s = NULL;
if (e->device_valid)
s = pa_namereg_get(c, e->device, PA_NAMEREG_SOURCE);
if (!s && e->card_valid) {
pa_card *card;
if ((card = pa_namereg_get(c, e->card, PA_NAMEREG_CARD)))
s = pa_idxset_first(card->sources, NULL);
}
/* It might happen that a stream and a sink are set up at the
same time, in which case we want to make sure we don't
interfere with that */
if (s && PA_SOURCE_IS_LINKED(pa_source_get_state(s))) {
pa_log_info("Restoring device for stream %s.", name);
new_data->source = s;
new_data->save_source = TRUE;
}
pa_xfree(e);
}
pa_xfree(name);
return PA_HOOK_OK;
}
static pa_hook_result_t sink_put_hook_callback(pa_core *c, pa_sink *sink, struct userdata *u) {
pa_sink_input *si;
uint32_t idx;
pa_assert(c);
pa_assert(sink);
pa_assert(u);
pa_assert(u->on_hotplug && u->restore_device);
PA_IDXSET_FOREACH(si, c->sink_inputs, idx) {
char *name;
struct entry *e;
if (si->sink == sink)
continue;
if (si->save_sink)
continue;
/* Skip this if it is already in the process of being moved
* anyway */
if (!si->sink)
continue;
/* It might happen that a stream and a sink are set up at the
same time, in which case we want to make sure we don't
interfere with that */
if (!PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(si)))
continue;
if (!(name = get_name(si->proplist, "sink-input")))
continue;
if ((e = read_entry(u, name))) {
if (e->device_valid && pa_streq(e->device, sink->name))
pa_sink_input_move_to(si, sink, TRUE);
pa_xfree(e);
}
pa_xfree(name);
}
return PA_HOOK_OK;
}
static pa_hook_result_t source_put_hook_callback(pa_core *c, pa_source *source, struct userdata *u) {
pa_source_output *so;
uint32_t idx;
pa_assert(c);
pa_assert(source);
pa_assert(u);
pa_assert(u->on_hotplug && u->restore_device);
PA_IDXSET_FOREACH(so, c->source_outputs, idx) {
char *name;
struct entry *e;
if (so->source == source)
continue;
if (so->save_source)
continue;
if (so->direct_on_input)
continue;
/* Skip this if it is already in the process of being moved anyway */
if (!so->source)
continue;
/* It might happen that a stream and a sink are set up at the
same time, in which case we want to make sure we don't
interfere with that */
if (!PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_get_state(so)))
continue;
if (!(name = get_name(so->proplist, "source-input")))
continue;
if ((e = read_entry(u, name))) {
if (e->device_valid && pa_streq(e->device, source->name))
pa_source_output_move_to(so, source, TRUE);
pa_xfree(e);
}
pa_xfree(name);
}
return PA_HOOK_OK;
}
static pa_hook_result_t sink_unlink_hook_callback(pa_core *c, pa_sink *sink, struct userdata *u) {
pa_sink_input *si;
uint32_t idx;
pa_assert(c);
pa_assert(sink);
pa_assert(u);
pa_assert(u->on_rescue && u->restore_device);
/* There's no point in doing anything if the core is shut down anyway */
if (c->state == PA_CORE_SHUTDOWN)
return PA_HOOK_OK;
PA_IDXSET_FOREACH(si, sink->inputs, idx) {
char *name;
struct entry *e;
if (!si->sink)
continue;
if (!(name = get_name(si->proplist, "sink-input")))
continue;
if ((e = read_entry(u, name))) {
if (e->device_valid) {
pa_sink *d;
if ((d = pa_namereg_get(c, e->device, PA_NAMEREG_SINK)) &&
d != sink &&
PA_SINK_IS_LINKED(pa_sink_get_state(d)))
pa_sink_input_move_to(si, d, TRUE);
}
pa_xfree(e);
}
pa_xfree(name);
}
return PA_HOOK_OK;
}
static pa_hook_result_t source_unlink_hook_callback(pa_core *c, pa_source *source, struct userdata *u) {
pa_source_output *so;
uint32_t idx;
pa_assert(c);
pa_assert(source);
pa_assert(u);
pa_assert(u->on_rescue && u->restore_device);
/* There's no point in doing anything if the core is shut down anyway */
if (c->state == PA_CORE_SHUTDOWN)
return PA_HOOK_OK;
PA_IDXSET_FOREACH(so, source->outputs, idx) {
char *name;
struct entry *e;
if (so->direct_on_input)
continue;
if (!so->source)
continue;
if (!(name = get_name(so->proplist, "source-output")))
continue;
if ((e = read_entry(u, name))) {
if (e->device_valid) {
pa_source *d;
if ((d = pa_namereg_get(c, e->device, PA_NAMEREG_SOURCE)) &&
d != source &&
PA_SOURCE_IS_LINKED(pa_source_get_state(d)))
pa_source_output_move_to(so, d, TRUE);
}
pa_xfree(e);
}
pa_xfree(name);
}
return PA_HOOK_OK;
}
#define EXT_VERSION 1
static void apply_entry(struct userdata *u, const char *name, struct entry *e) {
pa_sink_input *si;
pa_source_output *so;
uint32_t idx;
pa_assert(u);
pa_assert(name);
pa_assert(e);
PA_IDXSET_FOREACH(si, u->core->sink_inputs, idx) {
char *n;
pa_sink *s;
if (!(n = get_name(si->proplist, "sink-input")))
continue;
if (!pa_streq(name, n)) {
pa_xfree(n);
continue;
}
pa_xfree(n);
if (u->restore_volume && e->volume_valid) {
pa_cvolume v;
v = e->volume;
pa_log_info("Restoring volume for sink input %s.", name);
pa_cvolume_remap(&v, &e->channel_map, &si->channel_map);
pa_sink_input_set_volume(si, &v, TRUE, FALSE);
}
if (u->restore_muted && e->muted_valid) {
pa_log_info("Restoring mute state for sink input %s.", name);
pa_sink_input_set_mute(si, e->muted, TRUE);
}
if (u->restore_device &&
e->device_valid &&
(s = pa_namereg_get(u->core, e->device, PA_NAMEREG_SINK))) {
pa_log_info("Restoring device for stream %s.", name);
pa_sink_input_move_to(si, s, TRUE);
}
}
PA_IDXSET_FOREACH(so, u->core->source_outputs, idx) {
char *n;
pa_source *s;
if (!(n = get_name(so->proplist, "source-output")))
continue;
if (!pa_streq(name, n)) {
pa_xfree(n);
continue;
}
pa_xfree(n);
if (u->restore_device &&
e->device_valid &&
(s = pa_namereg_get(u->core, e->device, PA_NAMEREG_SOURCE))) {
pa_log_info("Restoring device for stream %s.", name);
pa_source_output_move_to(so, s, TRUE);
}
}
}
#if 0
static void dump_database(struct userdata *u) {
pa_datum key;
pa_bool_t done;
done = !pa_database_first(u->database, &key, NULL);
while (!done) {
pa_datum next_key;
struct entry *e;
char *name;
done = !pa_database_next(u->database, &key, &next_key, NULL);
name = pa_xstrndup(key.data, key.size);
pa_datum_free(&key);
if ((e = read_entry(u, name))) {
char t[256];
pa_log("name=%s", name);
pa_log("device=%s %s", e->device, pa_yes_no(e->device_valid));
pa_log("channel_map=%s", pa_channel_map_snprint(t, sizeof(t), &e->channel_map));
pa_log("volume=%s %s", pa_cvolume_snprint(t, sizeof(t), &e->volume), pa_yes_no(e->volume_valid));
pa_log("mute=%s %s", pa_yes_no(e->muted), pa_yes_no(e->volume_valid));
pa_xfree(e);
}
pa_xfree(name);
key = next_key;
}
}
#endif
static int extension_cb(pa_native_protocol *p, pa_module *m, pa_native_connection *c, uint32_t tag, pa_tagstruct *t) {
struct userdata *u;
uint32_t command;
pa_tagstruct *reply = NULL;
pa_assert(p);
pa_assert(m);
pa_assert(c);
pa_assert(t);
u = m->userdata;
if (pa_tagstruct_getu32(t, &command) < 0)
goto fail;
reply = pa_tagstruct_new(NULL, 0);
pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
pa_tagstruct_putu32(reply, tag);
switch (command) {
case SUBCOMMAND_TEST: {
if (!pa_tagstruct_eof(t))
goto fail;
pa_tagstruct_putu32(reply, EXT_VERSION);
break;
}
case SUBCOMMAND_READ: {
pa_datum key;
pa_bool_t done;
if (!pa_tagstruct_eof(t))
goto fail;
done = !pa_database_first(u->database, &key, NULL);
while (!done) {
pa_datum next_key;
struct entry *e;
char *name;
done = !pa_database_next(u->database, &key, &next_key, NULL);
name = pa_xstrndup(key.data, key.size);
pa_datum_free(&key);
if ((e = read_entry(u, name))) {
pa_cvolume r;
pa_channel_map cm;
pa_tagstruct_puts(reply, name);
pa_tagstruct_put_channel_map(reply, e->volume_valid ? &e->channel_map : pa_channel_map_init(&cm));
pa_tagstruct_put_cvolume(reply, e->volume_valid ? &e->volume : pa_cvolume_init(&r));
pa_tagstruct_puts(reply, e->device_valid ? e->device : NULL);
pa_tagstruct_put_boolean(reply, e->muted_valid ? e->muted : FALSE);
pa_xfree(e);
}
pa_xfree(name);
key = next_key;
}
break;
}
case SUBCOMMAND_WRITE: {
uint32_t mode;
pa_bool_t apply_immediately = FALSE;
if (pa_tagstruct_getu32(t, &mode) < 0 ||
pa_tagstruct_get_boolean(t, &apply_immediately) < 0)
goto fail;
if (mode != PA_UPDATE_MERGE &&
mode != PA_UPDATE_REPLACE &&
mode != PA_UPDATE_SET)
goto fail;
if (mode == PA_UPDATE_SET)
pa_database_clear(u->database);
while (!pa_tagstruct_eof(t)) {
const char *name, *device;
pa_bool_t muted;
struct entry entry;
pa_datum key, data;
pa_zero(entry);
entry.version = ENTRY_VERSION;
if (pa_tagstruct_gets(t, &name) < 0 ||
pa_tagstruct_get_channel_map(t, &entry.channel_map) ||
pa_tagstruct_get_cvolume(t, &entry.volume) < 0 ||
pa_tagstruct_gets(t, &device) < 0 ||
pa_tagstruct_get_boolean(t, &muted) < 0)
goto fail;
if (!name || !*name)
goto fail;
entry.volume_valid = entry.volume.channels > 0;
if (entry.volume_valid)
if (!pa_cvolume_compatible_with_channel_map(&entry.volume, &entry.channel_map))
goto fail;
entry.muted = muted;
entry.muted_valid = TRUE;
if (device)
pa_strlcpy(entry.device, device, sizeof(entry.device));
entry.device_valid = !!entry.device[0];
if (entry.device_valid &&
!pa_namereg_is_valid_name(entry.device))
goto fail;
key.data = (char*) name;
key.size = strlen(name);
data.data = &entry;
data.size = sizeof(entry);
if (pa_database_set(u->database, &key, &data, mode == PA_UPDATE_REPLACE) == 0)
if (apply_immediately)
apply_entry(u, name, &entry);
}
trigger_save(u);
break;
}
case SUBCOMMAND_DELETE:
while (!pa_tagstruct_eof(t)) {
const char *name;
pa_datum key;
if (pa_tagstruct_gets(t, &name) < 0)
goto fail;
key.data = (char*) name;
key.size = strlen(name);
pa_database_unset(u->database, &key);
}
trigger_save(u);
break;
case SUBCOMMAND_SUBSCRIBE: {
pa_bool_t enabled;
if (pa_tagstruct_get_boolean(t, &enabled) < 0 ||
!pa_tagstruct_eof(t))
goto fail;
if (enabled)
pa_idxset_put(u->subscribed, c, NULL);
else
pa_idxset_remove_by_data(u->subscribed, c, NULL);
break;
}
default:
goto fail;
}
pa_pstream_send_tagstruct(pa_native_connection_get_pstream(c), reply);
return 0;
fail:
if (reply)
pa_tagstruct_free(reply);
return -1;
}
static pa_hook_result_t connection_unlink_hook_cb(pa_native_protocol *p, pa_native_connection *c, struct userdata *u) {
pa_assert(p);
pa_assert(c);
pa_assert(u);
pa_idxset_remove_by_data(u->subscribed, c, NULL);
return PA_HOOK_OK;
}
int pa__init(pa_module*m) {
pa_modargs *ma = NULL;
struct userdata *u;
char *fname;
pa_sink_input *si;
pa_source_output *so;
uint32_t idx;
pa_bool_t restore_device = TRUE, restore_volume = TRUE, restore_muted = TRUE, on_hotplug = TRUE, on_rescue = TRUE;
pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments");
goto fail;
}
if (pa_modargs_get_value_boolean(ma, "restore_device", &restore_device) < 0 ||
pa_modargs_get_value_boolean(ma, "restore_volume", &restore_volume) < 0 ||
pa_modargs_get_value_boolean(ma, "restore_muted", &restore_muted) < 0 ||
pa_modargs_get_value_boolean(ma, "on_hotplug", &on_hotplug) < 0 ||
pa_modargs_get_value_boolean(ma, "on_rescue", &on_rescue) < 0) {
pa_log("restore_device=, restore_volume=, restore_muted=, on_hotplug= and on_rescue= expect boolean arguments");
goto fail;
}
if (!restore_muted && !restore_volume && !restore_device)
pa_log_warn("Neither restoring volume, nor restoring muted, nor restoring device enabled!");
m->userdata = u = pa_xnew0(struct userdata, 1);
u->core = m->core;
u->module = m;
u->restore_device = restore_device;
u->restore_volume = restore_volume;
u->restore_muted = restore_muted;
u->on_hotplug = on_hotplug;
u->on_rescue = on_rescue;
u->subscribed = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
u->protocol = pa_native_protocol_get(m->core);
pa_native_protocol_install_ext(u->protocol, m, extension_cb);
u->connection_unlink_hook_slot = pa_hook_connect(&pa_native_protocol_hooks(u->protocol)[PA_NATIVE_HOOK_CONNECTION_UNLINK], PA_HOOK_NORMAL, (pa_hook_cb_t) connection_unlink_hook_cb, u);
u->subscription = pa_subscription_new(m->core, PA_SUBSCRIPTION_MASK_SINK_INPUT|PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT, subscribe_callback, u);
if (restore_device) {
/* A little bit earlier than module-intended-roles ... */
u->sink_input_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) sink_input_new_hook_callback, u);
u->source_output_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) source_output_new_hook_callback, u);
}
if (restore_device && on_hotplug) {
/* A little bit earlier than module-intended-roles ... */
u->sink_put_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_LATE, (pa_hook_cb_t) sink_put_hook_callback, u);
u->source_put_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PUT], PA_HOOK_LATE, (pa_hook_cb_t) source_put_hook_callback, u);
}
if (restore_device && on_rescue) {
/* A little bit earlier than module-intended-roles, module-rescue-streams, ... */
u->sink_unlink_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) sink_unlink_hook_callback, u);
u->source_unlink_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) source_unlink_hook_callback, u);
}
if (restore_volume || restore_muted)
u->sink_input_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_FIXATE], PA_HOOK_EARLY, (pa_hook_cb_t) sink_input_fixate_hook_callback, u);
if (!(fname = pa_state_path("stream-volumes", TRUE)))
goto fail;
if (!(u->database = pa_database_open(fname, TRUE))) {
pa_log("Failed to open volume database '%s': %s", fname, pa_cstrerror(errno));
pa_xfree(fname);
goto fail;
}
pa_log_info("Sucessfully opened database file '%s'.", fname);
pa_xfree(fname);
PA_IDXSET_FOREACH(si, m->core->sink_inputs, idx)
subscribe_callback(m->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW, si->index, u);
PA_IDXSET_FOREACH(so, m->core->source_outputs, idx)
subscribe_callback(m->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_NEW, so->index, 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->subscription)
pa_subscription_free(u->subscription);
if (u->sink_input_new_hook_slot)
pa_hook_slot_free(u->sink_input_new_hook_slot);
if (u->sink_input_fixate_hook_slot)
pa_hook_slot_free(u->sink_input_fixate_hook_slot);
if (u->source_output_new_hook_slot)
pa_hook_slot_free(u->source_output_new_hook_slot);
if (u->sink_put_hook_slot)
pa_hook_slot_free(u->sink_put_hook_slot);
if (u->source_put_hook_slot)
pa_hook_slot_free(u->source_put_hook_slot);
if (u->sink_unlink_hook_slot)
pa_hook_slot_free(u->sink_unlink_hook_slot);
if (u->source_unlink_hook_slot)
pa_hook_slot_free(u->source_unlink_hook_slot);
if (u->connection_unlink_hook_slot)
pa_hook_slot_free(u->connection_unlink_hook_slot);
if (u->save_time_event)
u->core->mainloop->time_free(u->save_time_event);
if (u->database)
pa_database_close(u->database);
if (u->protocol) {
pa_native_protocol_remove_ext(u->protocol, m);
pa_native_protocol_unref(u->protocol);
}
if (u->subscribed)
pa_idxset_free(u->subscribed, NULL, NULL);
pa_xfree(u);
}
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