Settings

struct WpSettingsSpec

WpSettingSpec holds the specification of a setting.

struct WpSettingsItem

WpSettingsItem holds the key and value of a setting

struct WpSettings

WpSettings loads and parses the “sm-settings” (default value) metadata, which contains wireplumber settings, and provides APIs to its clients (modules, lua scripts etc) to access them.

Being a WpObject subclass, the settings inherits WpObject’s activation system.

enum WpSettingsSpecType

The different spec types of a setting.

Values:

enumerator WP_SETTINGS_SPEC_TYPE_UNKNOWN

enumerator WP_SETTINGS_SPEC_TYPE_BOOL

enumerator WP_SETTINGS_SPEC_TYPE_INT

enumerator WP_SETTINGS_SPEC_TYPE_FLOAT

enumerator WP_SETTINGS_SPEC_TYPE_STRING

enumerator WP_SETTINGS_SPEC_TYPE_ARRAY

enumerator WP_SETTINGS_SPEC_TYPE_OBJECT

enum WpSettingsFeatures

Flags to be used as WpObjectFeatures on WpSettings subclasses.

Values:

enumerator WP_SETTINGS_LOADED = (1 << 0)

Loads the settings

typedef void (*WpSettingsChangedCallback)(WpSettings *obj, const gchar *setting, WpSpaJson *value, gpointer user_data)

callback conveying the changed setting and its json value

Param obj:

the wpsettings object

Param setting:

the changed setting

Param value:

json value of the the changed setting

Param user_data:

data passed in the wp_settings_subscribe

WpSettingsSpec *wp_settings_spec_ref(WpSettingsSpec *self)

Increases the reference count of a settings spec object.

Parameters:

• self – a settings spec object

Returns:

(transfer full): self with an additional reference count on it

void wp_settings_spec_unref(WpSettingsSpec *self)

Decreases the reference count on self and frees it when the ref count reaches zero.

Parameters:

• self – (transfer full): a settings spec object

const gchar *wp_settings_spec_get_description(WpSettingsSpec *self)

Gets the description of a settings spec.

Parameters:

• self – the settings spec object

Returns:

the description of the settings spec

WpSettingsSpecType wp_settings_spec_get_value_type(WpSettingsSpec *self)

Gets the type of a settings spec.

Parameters:

• self – the settings spec object

Returns:

the type of the settings spec

WpSpaJson *wp_settings_spec_get_default_value(WpSettingsSpec *self)

Gets the default value of a settings spec.

Parameters:

• self – the settings spec object

Returns:

(transfer full): the default value of the settings spec

WpSpaJson *wp_settings_spec_get_min_value(WpSettingsSpec *self)

Gets the minimum value of a settings spec.

Parameters:

• self – the settings spec object

Returns:

(transfer full)(nullable): the minimum value of the settings spec, or NULL if the spec type is not WP_SETTINGS_SPEC_TYPE_INT or WP_SETTINGS_SPEC_TYPE_FLOAT

WpSpaJson *wp_settings_spec_get_max_value(WpSettingsSpec *self)

Gets the maximum value of a settings spec.

Parameters:

• self – the settings spec object

Returns:

(transfer full)(nullable): the maximum value of the settings spec, or NULL if the spec type is not WP_SETTINGS_SPEC_TYPE_INT or WP_SETTINGS_SPEC_TYPE_FLOAT

gboolean wp_settings_spec_check_value(WpSettingsSpec *self, WpSpaJson *value)

Checks whether a value is compatible with the spec or not.

Parameters:

• self – the settings spec object

• value – (transfer none): the value to check

Returns:

TRUE if the value is compatible with the spec, FALSE otherwise

WpSettingsItem *wp_settings_item_ref(WpSettingsItem *self)

Increases the reference count of a settings item object.

Parameters:

• self – a settings item object

Returns:

(transfer full): self with an additional reference count on it

void wp_settings_item_unref(WpSettingsItem *self)

Decreases the reference count on self and frees it when the ref count reaches zero.

Parameters:

• self – (transfer full): a settings item object

const gchar *wp_settings_item_get_key(WpSettingsItem *self)

Gets the key from a settings item.

Parameters:

• self – the item held by the GValue that was returned from the WpIterator of wp_settings_new_iterator()

Returns:

(transfer none): the settings key of the item

WpSpaJson *wp_settings_item_get_value(WpSettingsItem *self)

Gets the value from a settings item.

Parameters:

• self – the item held by the GValue that was returned from the WpIterator of wp_settings_new_iterator()

Returns:

(transfer full): the settings value of the item

WpSettings *wp_settings_new(WpCore *core, const gchar *metadata_name)

Creates a new WpSettings object.

Parameters:

• core – the WpCore

• metadata_name – (nullable): the name of the metadata object to associate with the settings object; NULL means the default “sm-settings”

Returns:

(transfer full): a new WpSettings object

WpSettings *wp_settings_find(WpCore *core, const gchar *metadata_name)

Finds a registered WpSettings object by its metadata name.

Parameters:

• core – the WpCore

• metadata_name – (nullable): the name of the metadata object that the settings object is associated with; NULL returns the first settings object that is found

Returns:

(transfer full) (nullable): the WpSettings object, or NULL if not found

guintptr wp_settings_subscribe(WpSettings *self, const gchar *pattern, WpSettingsChangedCallback callback, gpointer user_data)

Subscribes callback for a given setting pattern(a glob-style pattern matched using g_pattern_match_simple), this allows clients to look for any changes made in settings through metadata.

Parameters:

• self – the settings object

• pattern – name of the pattern to match the settings with

• callback – (scope async): the callback triggered when the settings change.

• user_data – data to pass to callback

Returns:

the subscription ID (always greater than 0 for successful subscriptions)

guintptr wp_settings_subscribe_closure(WpSettings *self, const gchar *pattern, GClosure *closure)

Subscribes callback for a given setting pattern(a glob-style pattern matched using g_pattern_match_simple), this allows clients to look for any changes made in settings through metadata.

Parameters:

• self – the settings object

• pattern – name of the pattern to match the settings with

• closure – (nullable): a GAsyncReadyCallback wrapped in a GClosure

Returns:

the subscription ID (always greater than 0 for success)

gboolean wp_settings_unsubscribe(WpSettings *self, guintptr subscription_id)

Unsubscribes callback for a given subscription_id.

Parameters:

• self – the settings object

• subscription_id – identifies the callback

Returns:

TRUE if success, FALSE otherwise

WpSpaJson *wp_settings_get(WpSettings *self, const gchar *name)

Gets the WpSpaJson value of a setting.

Parameters:

• self – the settings object

• name – the name of the setting

Returns:

(transfer full) (nullable): The WpSpaJson value of the setting, or NULL if the setting does not exist

WpSpaJson *wp_settings_get_saved(WpSettings *self, const gchar *name)

Gets the WpSpaJson saved value of a setting.

Parameters:

• self – the settings object

• name – the name of the setting

Returns:

(transfer full) (nullable): The WpSpaJson saved value of the setting, or NULL if the setting does not exist

WpSettingsSpec *wp_settings_get_spec(WpSettings *self, const gchar *name)

Gets the specification of a setting.

Parameters:

• self – the settings object

• name – the name of the setting

Returns:

(transfer full) (nullable): the specification of the setting

gboolean wp_settings_set(WpSettings *self, const gchar *name, WpSpaJson *value)

Sets a new setting value.

Parameters:

• self – the settings object

• name – the name of the setting

• value – (transfer none): the JSON value of the setting

Returns:

TRUE if the setting could be set, FALSE otherwise

gboolean wp_settings_reset(WpSettings *self, const char *name)

Resets the setting to its default value.

Parameters:

• self – the settings object

• name – the name of the setting to reset

Returns:

TRUE if the setting could be reset, FALSE otherwise

gboolean wp_settings_save(WpSettings *self, const char *name)

Saves a setting to make it persistent after reboot.

Parameters:

• self – the settings object

• name – the name of the setting to be saved

Returns:

TRUE if the setting could be saved, FALSE otherwise

gboolean wp_settings_delete(WpSettings *self, const char *name)

Deletes a saved setting to not make it persistent after reboot.

Parameters:

• self – the settings object

• name – the name of the saved setting to be deleted

Returns:

TRUE if the setting could be deleted, FALSE otherwise

void wp_settings_reset_all(WpSettings *self)

Resets all the settings to their default value.

Parameters:

• self – the settings object

void wp_settings_save_all(WpSettings *self)

Saves all the settings to make them persistent after reboot.

Parameters:

• self – the settings object

void wp_settings_delete_all(WpSettings *self)

Deletes all saved setting to not make them persistent after reboot.

Parameters:

• self – the settings object

WpIterator *wp_settings_new_iterator(WpSettings *self)

Iterates over settings.

Parameters:

• self – the settings object

Returns:

(transfer full): an iterator that iterates over the settings.

WP_TYPE_SETTINGS_SPEC (wp_settings_spec_get_type ())

The WpSettingsSpec GType.

WP_TYPE_SETTINGS_ITEM (wp_settings_item_get_type ())

The WpSettingsItem GType.

WP_TYPE_SETTINGS (wp_settings_get_type ())

The WpSettings GType.