card: Ensure that there's always at least one profile.

In practice there is always at least one profile, and I
don't think there will ever be cards without profiles.
Therefore, I added assertions to pa_card_new() stating that
the card new data must always contain at least one profile.
Now a lot of code can be simplified, because it's guaranteed
that the profiles hashmap and the active_profile field are
always non-NULL.

src/modules/alsa/module-alsa-card.c

@@ -502,7 +502,6 @@ int pa__init(pa_module *m) {
         if ((description = pa_proplist_gets(data.proplist, PA_PROP_DEVICE_DESCRIPTION)))
             pa_reserve_wrapper_set_application_device_name(reserve, description);
 
-    data.profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
     add_profiles(u, data.profiles, data.ports);
 
     if (pa_hashmap_isempty(data.profiles)) {

src/modules/bluetooth/module-bluetooth-device.c

@@ -2852,8 +2852,6 @@ static int add_card(struct userdata *u, const pa_bluetooth_device *device) {
         return -1;
     }
 
-    data.profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
-
     /* we base hsp/a2dp availability on UUIDs.
        Ideally, it would be based on "Connected" state, but
        we can't afford to wait for this information when

src/modules/dbus/iface-card.c

@@ -309,16 +309,7 @@ static void handle_get_active_profile(DBusConnection *conn, DBusMessage *msg, vo
     pa_assert(msg);
     pa_assert(c);
 
-    if (!c->active_profile) {
-        pa_assert(pa_hashmap_isempty(c->profiles));
-
-        pa_dbus_send_error(conn, msg, PA_DBUS_ERROR_NO_SUCH_PROPERTY,
-                           "The card %s has no profiles, and therefore there's no active profile either.", c->card->name);
-        return;
-    }
-
     active_profile = pa_dbusiface_card_profile_get_path(pa_hashmap_get(c->profiles, c->active_profile->name));
-
     pa_dbus_send_basic_variant_reply(conn, msg, DBUS_TYPE_OBJECT_PATH, &active_profile);
 }
 
@@ -333,15 +324,6 @@ static void handle_set_active_profile(DBusConnection *conn, DBusMessage *msg, DB
     pa_assert(iter);
     pa_assert(c);
 
-    if (!c->active_profile) {
-        pa_assert(pa_hashmap_isempty(c->profiles));
-
-        pa_dbus_send_error(conn, msg, PA_DBUS_ERROR_NO_SUCH_PROPERTY,
-                           "The card %s has no profiles, and therefore there's no active profile either.",
-                           c->card->name);
-        return;
-    }
-
     dbus_message_iter_get_basic(iter, &new_active_path);
 
     if (!(new_active = pa_hashmap_get(c->profiles, new_active_path))) {
@@ -393,8 +375,7 @@ static void handle_get_all(DBusConnection *conn, DBusMessage *msg, void *userdat
     sinks = get_sinks(c, &n_sinks);
     sources = get_sources(c, &n_sources);
     profiles = get_profiles(c, &n_profiles);
-    if (c->active_profile)
-        active_profile = pa_dbusiface_card_profile_get_path(pa_hashmap_get(c->profiles, c->active_profile->name));
+    active_profile = pa_dbusiface_card_profile_get_path(pa_hashmap_get(c->profiles, c->active_profile->name));
 
     pa_assert_se((reply = dbus_message_new_method_return(msg)));
 
@@ -411,9 +392,7 @@ static void handle_get_all(DBusConnection *conn, DBusMessage *msg, void *userdat
     pa_dbus_append_basic_array_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_SINKS].property_name, DBUS_TYPE_OBJECT_PATH, sinks, n_sinks);
     pa_dbus_append_basic_array_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_SOURCES].property_name, DBUS_TYPE_OBJECT_PATH, sources, n_sources);
     pa_dbus_append_basic_array_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_PROFILES].property_name, DBUS_TYPE_OBJECT_PATH, profiles, n_profiles);
-
-    if (active_profile)
-        pa_dbus_append_basic_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_ACTIVE_PROFILE].property_name, DBUS_TYPE_OBJECT_PATH, &active_profile);
+    pa_dbus_append_basic_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_ACTIVE_PROFILE].property_name, DBUS_TYPE_OBJECT_PATH, &active_profile);
 
     pa_dbus_append_proplist_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_PROPERTY_LIST].property_name, c->proplist);
 
@@ -501,6 +480,8 @@ static void subscription_cb(pa_core *core, pa_subscription_event_type_t t, uint3
 
 pa_dbusiface_card *pa_dbusiface_card_new(pa_dbusiface_core *core, pa_card *card) {
     pa_dbusiface_card *c = NULL;
+    pa_card_profile *profile;
+    void *state;
 
     pa_assert(core);
     pa_assert(card);
@@ -511,20 +492,14 @@ pa_dbusiface_card *pa_dbusiface_card_new(pa_dbusiface_core *core, pa_card *card)
     c->path = pa_sprintf_malloc("%s/%s%u", PA_DBUS_CORE_OBJECT_PATH, OBJECT_NAME, card->index);
     c->profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
     c->next_profile_index = 0;
-    c->active_profile = NULL;
+    c->active_profile = card->active_profile;
     c->proplist = pa_proplist_copy(card->proplist);
     c->dbus_protocol = pa_dbus_protocol_get(card->core);
     c->subscription = pa_subscription_new(card->core, PA_SUBSCRIPTION_MASK_CARD, subscription_cb, c);
 
-    if (card->profiles) {
-        pa_card_profile *profile;
-        void *state = NULL;
-
-        PA_HASHMAP_FOREACH(profile, card->profiles, state) {
-            pa_dbusiface_card_profile *p = pa_dbusiface_card_profile_new(c, card->core, profile, c->next_profile_index++);
-            pa_hashmap_put(c->profiles, pa_dbusiface_card_profile_get_name(p), p);
-        }
-        pa_assert_se(c->active_profile = card->active_profile);
+    PA_HASHMAP_FOREACH(profile, card->profiles, state) {
+        pa_dbusiface_card_profile *p = pa_dbusiface_card_profile_new(c, card->core, profile, c->next_profile_index++);
+        pa_hashmap_put(c->profiles, pa_dbusiface_card_profile_get_name(p), p);
     }
 
     pa_assert_se(pa_dbus_protocol_add_interface(c->dbus_protocol, c->path, &card_interface_info, c) >= 0);

src/modules/module-card-restore.c

@@ -253,7 +253,7 @@ static void subscribe_callback(pa_core *c, pa_subscription_event_type_t t, uint3
         return;
 
     entry = entry_new();
-    entry->profile = pa_xstrdup(card->active_profile ? card->active_profile->name : "");
+    entry->profile = pa_xstrdup(card->active_profile->name);
 
     if ((old = entry_read(u, card->name))) {
 

src/modules/module-switch-on-port-available.c

@@ -60,10 +60,6 @@ static pa_bool_t try_to_switch_profile(pa_card *card, pa_device_port *port) {
             if (best_profile && best_profile->priority >= profile->priority)
                 continue;
 
-            if (!card->active_profile) {
-                best_profile = profile;
-                continue;
-            }
 
             /* We make a best effort to keep other direction unchanged */
             if (!port->is_input) {
@@ -156,7 +152,7 @@ static pa_hook_result_t port_available_hook_callback(pa_core *c, pa_device_port
 
     find_sink_and_source(card, port, &sink, &source);
 
-    is_active_profile = port->profiles && card->active_profile &&
+    is_active_profile = port->profiles &&
         card->active_profile == pa_hashmap_get(port->profiles, card->active_profile->name);
     is_active_port = (sink && sink->active_port == port) || (source && source->active_port == port);
 

src/pulsecore/card.c

@@ -67,6 +67,7 @@ pa_card_new_data* pa_card_new_data_init(pa_card_new_data *data) {
 
     memset(data, 0, sizeof(*data));
     data->proplist = pa_proplist_new();
+    data->profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
     data->ports = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
     return data;
 }
@@ -114,6 +115,8 @@ pa_card *pa_card_new(pa_core *core, pa_card_new_data *data) {
     pa_core_assert_ref(core);
     pa_assert(data);
     pa_assert(data->name);
+    pa_assert(data->profiles);
+    pa_assert(!pa_hashmap_isempty(data->profiles));
 
     c = pa_xnew(pa_card, 1);
 
@@ -149,11 +152,11 @@ pa_card *pa_card_new(pa_core *core, pa_card_new_data *data) {
     c->active_profile = NULL;
     c->save_profile = FALSE;
 
-    if (data->active_profile && c->profiles)
+    if (data->active_profile)
         if ((c->active_profile = pa_hashmap_get(c->profiles, data->active_profile)))
             c->save_profile = data->save_profile;
 
-    if (!c->active_profile && c->profiles) {
+    if (!c->active_profile) {
         void *state;
         pa_card_profile *p;
 
@@ -221,6 +224,7 @@ void pa_card_free(pa_card *c) {
 int pa_card_set_profile(pa_card *c, const char *name, pa_bool_t save) {
     pa_card_profile *profile;
     int r;
+
     pa_assert(c);
 
     if (!c->set_profile) {
@@ -228,7 +232,7 @@ int pa_card_set_profile(pa_card *c, const char *name, pa_bool_t save) {
         return -PA_ERR_NOTIMPLEMENTED;
     }
 
-    if (!c->profiles || !name)
+    if (!name)
         return -PA_ERR_NOENTITY;
 
     if (!(profile = pa_hashmap_get(c->profiles, name)))

src/pulsecore/cli-command.c

@@ -1840,8 +1840,7 @@ static int pa_cli_command_dump(pa_core *c, pa_tokenizer *t, pa_strbuf *buf, pa_b
             nl = TRUE;
         }
 
-        if (card->active_profile)
-            pa_strbuf_printf(buf, "set-card-profile %s %s\n", card->name, card->active_profile->name);
+        pa_strbuf_printf(buf, "set-card-profile %s %s\n", card->name, card->active_profile->name);
     }
 
     nl = FALSE;

src/pulsecore/cli-text.c

@@ -149,6 +149,8 @@ char *pa_card_list_to_string(pa_core *c) {
         pa_sink *sink;
         pa_source *source;
         uint32_t sidx;
+        pa_card_profile *profile;
+        void *state;
 
         pa_strbuf_printf(
                 s,
@@ -166,20 +168,14 @@ char *pa_card_list_to_string(pa_core *c) {
         pa_strbuf_printf(s, "\tproperties:\n\t\t%s\n", t);
         pa_xfree(t);
 
-        if (card->profiles) {
-            pa_card_profile *p;
-            void *state;
+        pa_strbuf_puts(s, "\tprofiles:\n");
+        PA_HASHMAP_FOREACH(profile, card->profiles, state)
+            pa_strbuf_printf(s, "\t\t%s: %s (priority %u)\n", profile->name, profile->description, profile->priority);
 
-            pa_strbuf_puts(s, "\tprofiles:\n");
-            PA_HASHMAP_FOREACH(p, card->profiles, state)
-                pa_strbuf_printf(s, "\t\t%s: %s (priority %u)\n", p->name, p->description, p->priority);
-        }
-
-        if (card->active_profile)
-            pa_strbuf_printf(
-                    s,
-                    "\tactive profile: <%s>\n",
-                    card->active_profile->name);
+        pa_strbuf_printf(
+                s,
+                "\tactive profile: <%s>\n",
+                card->active_profile->name);
 
         if (!pa_idxset_isempty(card->sinks)) {
             pa_strbuf_puts(s, "\tsinks:\n");

src/pulsecore/protocol-native.c

@@ -3239,19 +3239,17 @@ static void card_fill_tagstruct(pa_native_connection *c, pa_tagstruct *t, pa_car
     pa_tagstruct_putu32(t, card->module ? card->module->index : PA_INVALID_INDEX);
     pa_tagstruct_puts(t, card->driver);
 
-    pa_tagstruct_putu32(t, card->profiles ? pa_hashmap_size(card->profiles) : 0);
+    pa_tagstruct_putu32(t, pa_hashmap_size(card->profiles));
 
-    if (card->profiles) {
-        while ((p = pa_hashmap_iterate(card->profiles, &state, NULL))) {
-            pa_tagstruct_puts(t, p->name);
-            pa_tagstruct_puts(t, p->description);
-            pa_tagstruct_putu32(t, p->n_sinks);
-            pa_tagstruct_putu32(t, p->n_sources);
-            pa_tagstruct_putu32(t, p->priority);
-        }
+    PA_HASHMAP_FOREACH(p, card->profiles, state) {
+        pa_tagstruct_puts(t, p->name);
+        pa_tagstruct_puts(t, p->description);
+        pa_tagstruct_putu32(t, p->n_sinks);
+        pa_tagstruct_putu32(t, p->n_sources);
+        pa_tagstruct_putu32(t, p->priority);
     }
 
-    pa_tagstruct_puts(t, card->active_profile ? card->active_profile->name : NULL);
+    pa_tagstruct_puts(t, card->active_profile->name);
     pa_tagstruct_put_proplist(t, card->proplist);
 
     if (c->version < 26)