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stream-restore: Support a simple fallback volume table

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The purpose of this patch is to make it possible to configure stream volumes
before pulseaudio is run for the first time. This is useful, for example, in
embedded products where the default volumes have to be sensible already in
the first boot.
This commit is contained in:
Marc-André Lureau 2011-10-01 12:16:35 +01:00 • committed by Colin Guthrie
parent 666261ece8
commit 188c91b514
1 changed files with 95 additions and 2 deletions
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97
src/modules/module-stream-restore.c
View file

@ -68,17 +68,24 @@ PA_MODULE_USAGE(
"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?>");
"on_rescue=<When device becomes unavailable, recheck streams?> "
"fallback_table=<filename>");
#define SAVE_INTERVAL (10 * PA_USEC_PER_SEC)
#define IDENTIFICATION_PROPERTY "module-stream-restore.id"
#define DEFAULT_FALLBACK_FILE PA_DEFAULT_CONFIG_DIR"/stream-restore.table"
#define DEFAULT_FALLBACK_FILE_USER "stream-restore.table"
#define WHITESPACE "\n\r \t"
static const char* const valid_modargs[] = {
"restore_device",
"restore_volume",
"restore_muted",
"on_hotplug",
"on_rescue",
"fallback_table",
NULL
};
@ -1800,7 +1807,88 @@ static pa_hook_result_t source_unlink_hook_callback(pa_core *c, pa_source *sourc
return PA_HOOK_OK;
}
#define EXT_VERSION 1
static int fill_db(struct userdata *u, const char *filename) {
FILE *f;
int n = 0;
int ret = -1;
char *fn = NULL;
pa_assert(u);
if (filename)
f = fopen(fn = pa_xstrdup(filename), "r");
else
f = pa_open_config_file(DEFAULT_FALLBACK_FILE, DEFAULT_FALLBACK_FILE_USER, NULL, &fn);
if (!f) {
if (filename)
pa_log("Failed to open %s: %s", filename, pa_cstrerror(errno));
else
ret = 0;
goto finish;
}
while (!feof(f)) {
char ln[256];
char *d, *v;
double db;
if (!fgets(ln, sizeof(ln), f))
break;
n++;
pa_strip_nl(ln);
if (!*ln || ln[0] == '#' || ln[0] == ';')
continue;
d = ln+strcspn(ln, WHITESPACE);
v = d+strspn(d, WHITESPACE);
if (!*v) {
pa_log("[%s:%u] failed to parse line - too few words", fn, n);
goto finish;
}
*d = 0;
if (pa_atod(v, &db) >= 0) {
if (db <= 0.0) {
pa_datum key, data;
struct entry e;
pa_zero(e);
e.version = ENTRY_VERSION;
e.volume_valid = TRUE;
pa_cvolume_set(&e.volume, 1, pa_sw_volume_from_dB(db));
pa_channel_map_init_mono(&e.channel_map);
key.data = (void *) ln;
key.size = strlen(ln);
data.data = (void *) &e;
data.size = sizeof(e);
if (pa_database_set(u->database, &key, &data, FALSE) == 0)
pa_log_debug("Setting %s to %0.2f dB.", ln, db);
} else
pa_log_warn("[%s:%u] Positive dB values are not allowed, not setting entry %s.", fn, n, ln);
} else
pa_log_warn("[%s:%u] Couldn't parse '%s' as a double, not setting entry %s.", fn, n, v, ln);
}
trigger_save(u);
ret = 0;
finish:
if (f)
fclose(f);
pa_xfree(fn);
return ret;
}
static void entry_apply(struct userdata *u, const char *name, struct entry *e) {
pa_sink_input *si;
@ -1942,6 +2030,8 @@ PA_GCC_UNUSED static void stream_restore_dump_database(struct userdata *u) {
}
#endif
#define EXT_VERSION 1
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;
@ -2280,6 +2370,9 @@ int pa__init(pa_module*m) {
pa_log_info("Successfully opened database file '%s'.", fname);
pa_xfree(fname);
if (fill_db(u, pa_modargs_get_value(ma, "fallback_table", NULL)) < 0)
goto fail;
#ifdef HAVE_DBUS
u->dbus_protocol = pa_dbus_protocol_get(u->core);
u->dbus_entries = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);