static GKeyFile *
preset_open_and_parse_header (GstPreset * preset, const gchar * preset_path,
guint64 * preset_version)
{
GKeyFile *in;
GError *error = NULL;
gboolean res;
const gchar *element_name;
gchar *name;
in = g_key_file_new ();
res = g_key_file_load_from_file (in, preset_path,
G_KEY_FILE_KEEP_COMMENTS | G_KEY_FILE_KEEP_TRANSLATIONS, &error);
if (!res || error != NULL)
goto load_error;
/* element type name and preset name must match or we are dealing with a wrong
* preset file */
element_name = G_OBJECT_TYPE_NAME (preset);
name =
g_key_file_get_value (in, PRESET_HEADER, PRESET_HEADER_ELEMENT_NAME,
NULL);
if (!name || strcmp (name, element_name))
goto wrong_name;
g_free (name);
/* get the version now so that the caller can check it */
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;
/* ERRORS */
load_error:
{
GST_WARNING_OBJECT (preset, "Unable to read preset file %s: %s",
preset_path, error->message);
g_error_free (error);
g_key_file_free (in);
return NULL;
}
wrong_name:
{
GST_WARNING_OBJECT (preset,
"Wrong element name in preset file %s. Expected %s, got %s",
preset_path, element_name, GST_STR_NULL (name));
g_free (name);
g_key_file_free (in);
return NULL;
}
}
/* reads the user and system presets files and merges them together. This
* function caches the GKeyFile on the element type. If there is no existing
* preset file, a new in-memory GKeyFile will be created. */
static GKeyFile *
preset_get_keyfile (GstPreset * preset)
{
GKeyFile *presets;
GType type = G_TYPE_FROM_INSTANCE (preset);
/* 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. */
in_user = preset_open_and_parse_header (preset, preset_user_path,
&str_version_user);
in_system = preset_open_and_parse_header (preset, preset_system_path,
&str_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;
}
}
if (in_user) {
if (updated_from_system) {
/* merge user on top of system presets */
preset_merge (presets, in_user);
g_key_file_free (in_user);
} else {
/* keep user presets */
presets = in_user;
}
}
if (!in_user && !in_system) {
/* we did not load a user 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) {
gst_preset_default_save_presets_file (preset);
}
}
return presets;
}
