* native preset format of those wrapped plugins.
* One method that is useful to be overridden is gst_preset_get_property_names().
* With that one can control which properties are saved and in which order.
+ *
+ * The default implementation supports presets located in a system directory,
+ * application specific directory and in the users home directory. When getting
+ * a list of presets individual presets are read and overlaid in 1) system,
+ * 2) application and 3) user order. Whenever an earlier entry is newer, the
+ * later entries will be updated.
+ *
*/
/* FIXME:
* - non racyness
#define PRESET_HEADER_VERSION "version"
static GQuark preset_user_path_quark = 0;
+static GQuark preset_app_path_quark = 0;
static GQuark preset_system_path_quark = 0;
static GQuark preset_quark = 0;
/*static GQuark property_list_quark = 0;*/
+/* the application can set a custom path that is checked in addition to standart
+ * system and user dirs. This helps to develop new presets first local to the
+ * application.
+ */
+static gchar *preset_app_dir = NULL;
+
/* default iface implementation */
static gboolean gst_preset_default_save_presets_file (GstPreset * preset);
* preset_get_paths:
* @preset: a #GObject that implements #GstPreset
* @preset_user_path: location for path or %NULL
+ * @preset_app_path: location for path or %NULL
* @preset_system_path: location for path or %NULL
*
- * Fetch the preset_path for user local and system wide settings. Don't free
- * after use.
+ * Fetch the preset_path for user local, application specific and system wide
+ * settings. Don't free after use.
*
* Returns: %FALSE if no paths could be found.
*/
static gboolean
preset_get_paths (GstPreset * preset, const gchar ** preset_user_path,
- const gchar ** preset_system_path)
+ const gchar ** preset_app_path, const gchar ** preset_system_path)
{
GType type = G_TYPE_FROM_INSTANCE (preset);
gchar *preset_path;
*preset_user_path = preset_path;
}
+ if (preset_app_path) {
+ if (preset_app_dir) {
+ if (!(preset_path = g_type_get_qdata (type, preset_system_path_quark))) {
+ preset_path = g_strdup_printf ("%s" G_DIR_SEPARATOR_S "%s.prs",
+ preset_app_dir, element_name);
+ GST_INFO_OBJECT (preset, "application_preset_path: '%s'", preset_path);
+
+ /* cache the preset path to the type */
+ g_type_set_qdata (type, preset_app_path_quark, preset_path);
+ }
+ *preset_app_path = preset_path;
+ } else {
+ *preset_app_path = NULL;
+ }
+ }
+
if (preset_system_path) {
/* preset system path requested, see if we have it cached in the qdata */
if (!(preset_path = g_type_get_qdata (type, preset_system_path_quark))) {
return FALSE;
}
-/* caller must free @preset_version after use */
+static guint64
+preset_parse_version (const gchar * str_version)
+{
+ guint major, minor, micro, nano;
+ gint num;
+
+ major = minor = micro = nano = 0;
+
+ /* parse version (e.g. 0.10.15.1) to guint64 */
+ num = sscanf (str_version, "%u.%u.%u.%u", &major, &minor, µ, &nano);
+ /* make sure we have atleast "major.minor" */
+ if (num > 1) {
+ guint64 version;
+
+ version = ((((major << 8 | minor) << 8) | micro) << 8) | nano;
+ GST_DEBUG ("version %s -> %" G_GUINT64_FORMAT, str_version, version);
+ return version;
+ }
+ return G_GUINT64_CONSTANT (0);
+}
+
static GKeyFile *
preset_open_and_parse_header (GstPreset * preset, const gchar * preset_path,
- gchar ** preset_version)
+ guint64 * preset_version)
{
GKeyFile *in;
GError *error = NULL;
g_free (name);
/* get the version now so that the caller can check it */
- if (preset_version)
- *preset_version =
+ if (preset_version) {
+ gchar *str =
g_key_file_get_value (in, PRESET_HEADER, PRESET_HEADER_VERSION, NULL);
+ *preset_version = preset_parse_version (str);
+ g_free (str);
+ }
return in;
}
}
-static guint64
-preset_parse_version (const gchar * str_version)
-{
- guint major, minor, micro, nano;
- gint num;
-
- major = minor = micro = nano = 0;
-
- /* parse version (e.g. 0.10.15.1) to guint64 */
- num = sscanf (str_version, "%u.%u.%u.%u", &major, &minor, µ, &nano);
- /* make sure we have atleast "major.minor" */
- if (num > 1) {
- guint64 version;
-
- version = ((((major << 8 | minor) << 8) | micro) << 8) | nano;
- GST_DEBUG ("version %s -> %" G_GUINT64_FORMAT, str_version, version);
- return version;
- }
- return G_GUINT64_CONSTANT (0);
-}
-
static void
preset_merge (GKeyFile * system, GKeyFile * user)
{
/* first see if the have a cached version for the type */
if (!(presets = g_type_get_qdata (type, preset_quark))) {
- const gchar *preset_user_path, *preset_system_path;
- gchar *str_version_user = NULL, *str_version_system = NULL;
- gboolean updated_from_system = FALSE;
- GKeyFile *in_user, *in_system;
-
- preset_get_paths (preset, &preset_user_path, &preset_system_path);
-
- /* try to load the user and system presets, we do this to get the versions
- * of both files. */
+ const gchar *preset_user_path, *preset_app_path, *preset_system_path;
+ guint64 version_system = G_GUINT64_CONSTANT (0);
+ guint64 version_app = G_GUINT64_CONSTANT (0);
+ guint64 version_user = G_GUINT64_CONSTANT (0);
+ guint64 version = G_GUINT64_CONSTANT (0);
+ gboolean merged = FALSE;
+ GKeyFile *in_user, *in_app = NULL, *in_system;
+
+ preset_get_paths (preset, &preset_user_path, &preset_app_path,
+ &preset_system_path);
+
+ /* try to load the user, app and system presets, we do this to get the
+ * versions of all files. */
in_user = preset_open_and_parse_header (preset, preset_user_path,
- &str_version_user);
+ &version_user);
+ if (preset_app_path) {
+ in_app = preset_open_and_parse_header (preset, preset_app_path,
+ &version_app);
+ }
in_system = preset_open_and_parse_header (preset, preset_system_path,
- &str_version_system);
+ &version_system);
/* compare version to check for merge */
if (in_system) {
- /* keep system presets if there is no user preset or when the system
- * version is higher than the user version. */
- if (!in_user) {
- presets = in_system;
- } else if (preset_parse_version (str_version_system) >
- preset_parse_version (str_version_user)) {
- presets = in_system;
- updated_from_system = TRUE;
+ presets = in_system;
+ version = version_system;
+ }
+ if (in_app) {
+ /* if system version is higher, merge */
+ if (version > version_app) {
+ preset_merge (presets, in_app);
+ g_key_file_free (in_app);
+ } else {
+ if (presets)
+ g_key_file_free (presets);
+ presets = in_app;
+ version = version_system;
}
}
if (in_user) {
- if (updated_from_system) {
- /* merge user on top of system presets */
+ /* if system or app version is higher, merge */
+ if (version > version_user) {
preset_merge (presets, in_user);
g_key_file_free (in_user);
+ merged = TRUE;
} else {
- /* keep user presets */
+ if (presets)
+ g_key_file_free (presets);
presets = in_user;
+ version = version_user;
}
}
- if (!in_user && !in_system) {
- /* we did not load a user or system presets file, create a new one */
+
+ if (!presets) {
+ /* we did not load a user, app or system presets file, create a new one */
presets = g_key_file_new ();
g_key_file_set_string (presets, PRESET_HEADER, PRESET_HEADER_ELEMENT_NAME,
G_OBJECT_TYPE_NAME (preset));
}
- g_free (str_version_user);
- g_free (str_version_system);
-
/* attach the preset to the type */
g_type_set_qdata (type, preset_quark, (gpointer) presets);
- if (updated_from_system) {
+ if (merged) {
gst_preset_default_save_presets_file (preset);
}
}
gchar *data;
gsize data_size;
- preset_get_paths (preset, &preset_path, NULL);
+ preset_get_paths (preset, &preset_path, NULL, NULL);
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
return GST_PRESET_GET_INTERFACE (preset)->get_meta (preset, name, tag, value);
}
+/**
+ * gst_preset_set_app_dir:
+ * @app_dir: the application specific preset dir
+ *
+ * Sets an extra directory as an absolute path that should be considered when
+ * looking for presets. Any presets in the application dir will shadow the
+ * system presets.
+ *
+ * Returns: %TRUE for success, %FALSE if the dir already has been set
+ *
+ * Since: 0.10.36
+ */
+gboolean
+gst_preset_set_app_dir (const gchar * app_dir)
+{
+ g_return_val_if_fail (app_dir, FALSE);
+
+ if (!preset_app_dir) {
+ preset_app_dir = g_strdup (app_dir);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/**
+ * gst_preset_get_app_dir:
+ *
+ * Gets the directory for application specific presets if set by the
+ * application.
+ *
+ * Returns: the directory or %NULL, don't free or modify the string
+ *
+ * Since: 0.10.36
+ */
+const gchar *
+gst_preset_get_app_dir (void)
+{
+ return preset_app_dir;
+}
+
/* class internals */
static void
preset_quark = g_quark_from_static_string ("GstPreset::presets");
preset_user_path_quark =
g_quark_from_static_string ("GstPreset::user_path");
+ preset_app_path_quark = g_quark_from_static_string ("GstPreset::app_path");
preset_system_path_quark =
g_quark_from_static_string ("GstPreset::system_path");
projects / platform / upstream / gstreamer.git / commitdiff