/* 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_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,
&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,
&version_system);
/* compare version to check for merge */
if (in_system) {
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 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 {
if (presets)
g_key_file_free (presets);
presets = in_user;
}
}
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));
}
/* attach the preset to the type */
g_type_set_qdata (type, preset_quark, (gpointer) presets);
if (merged) {
gst_preset_default_save_presets_file (preset);
}
}
return presets;
}
/* save the presets file. A copy of the existing presets file is stored in a
* .bak file */
static gboolean
gst_preset_default_save_presets_file (GstPreset * preset)
{
GKeyFile *presets;
const gchar *preset_path;
GError *error = NULL;
gchar *bak_file_name;
gboolean backup = TRUE;
gchar *data;
gsize data_size;
preset_get_paths (preset, &preset_path, NULL, NULL);
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
goto no_presets;
GST_DEBUG_OBJECT (preset, "saving preset file: '%s'", preset_path);
/* create backup if possible */
bak_file_name = g_strdup_printf ("%s.bak", preset_path);
if (g_file_test (bak_file_name, G_FILE_TEST_EXISTS)) {
if (g_unlink (bak_file_name)) {
backup = FALSE;
GST_INFO_OBJECT (preset, "cannot remove old backup file : %s",
bak_file_name);
}
}
if (backup) {
if (g_rename (preset_path, bak_file_name)) {
GST_INFO_OBJECT (preset, "cannot backup file : %s -> %s", preset_path,
bak_file_name);
}
}
g_free (bak_file_name);
/* update gstreamer version */
g_key_file_set_string (presets, PRESET_HEADER, PRESET_HEADER_VERSION,
PACKAGE_VERSION);
/* get new contents, wee need this to save it */
if (!(data = g_key_file_to_data (presets, &data_size, &error)))
goto convert_failed;
/* write presets */
if (!g_file_set_contents (preset_path, data, data_size, &error))
goto write_failed;
g_free (data);
return TRUE;
/* ERRORS */
no_presets:
{
GST_WARNING_OBJECT (preset,
"no presets, trying to unlink possibly existing preset file: '%s'",
preset_path);
g_unlink (preset_path);
return FALSE;
}
convert_failed:
{
GST_WARNING_OBJECT (preset, "can not get the keyfile contents: %s",
error->message);
g_error_free (error);
g_free (data);
return FALSE;
}
write_failed:
{
GST_WARNING_OBJECT (preset, "Unable to store preset file %s: %s",
preset_path, error->message);
g_error_free (error);
g_free (data);
return FALSE;
}
}
/* 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;
}
