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device-manager: When a new device is encountered, initialise the priority list to an appropriate value

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This commit is contained in:
Colin Guthrie 2009-09-20 14:36:20 +01:00
parent a64f0f719f
commit 1802500967
1 changed files with 56 additions and 4 deletions
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60
src/modules/module-device-manager.c
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@ -203,6 +203,60 @@ static pa_bool_t entries_equal(const struct entry *a, const struct entry *b) {
return TRUE;
}
static inline struct entry *load_or_initialize_entry(struct userdata *u, struct entry *entry, const char *name, const char *prefix) {
struct entry *old;
pa_assert(u);
pa_assert(entry);
pa_assert(name);
pa_assert(prefix);
if ((old = read_entry(u, name)))
*entry = *old;
else {
/* This is a new device, so make sure we write it's priority list correctly */
uint32_t max_priority[NUM_ROLES];
pa_datum key;
pa_bool_t done;
pa_zero(max_priority);
done = !pa_database_first(u->database, &key, NULL);
/* Find all existing devices with the same prefix so we calculate the current max priority for each role */
while (!done) {
pa_datum next_key;
done = !pa_database_next(u->database, &key, &next_key, NULL);
if (key.size > strlen(prefix) && strncmp(key.data, prefix, strlen(prefix)) == 0) {
char *name2;
struct entry *e;
name2 = pa_xstrndup(key.data, key.size);
if ((e = read_entry(u, name2))) {
for (uint32_t i = 0; i < NUM_ROLES; ++i) {
max_priority[i] = PA_MAX(max_priority[i], e->priority[i]);
}
pa_xfree(e);
}
pa_xfree(name2);
}
pa_datum_free(&key);
key = next_key;
}
/* Actually initialise our entry now we've calculated it */
for (uint32_t i = 0; i < NUM_ROLES; ++i) {
entry->priority[i] = max_priority[i] + 1;
}
}
return old;
}
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 = NULL;
@ -229,8 +283,7 @@ static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint3
name = pa_sprintf_malloc("sink:%s", sink->name);
if ((old = read_entry(u, name)))
entry = *old;
old = load_or_initialize_entry(u, &entry, name, "sink:");
pa_strlcpy(entry.description, pa_strnull(pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_DESCRIPTION)), sizeof(entry.description));
@ -247,8 +300,7 @@ static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint3
name = pa_sprintf_malloc("source:%s", source->name);
if ((old = read_entry(u, name)))
entry = *old;
old = load_or_initialize_entry(u, &entry, name, "source:");
pa_strlcpy(entry.description, pa_strnull(pa_proplist_gets(source->proplist, PA_PROP_DEVICE_DESCRIPTION)), sizeof(entry.description));
}