static gboolean
gst_preset_default_set_meta (GstPreset * preset, const gchar * name,
const gchar * tag, const gchar * value)
{
GKeyFile *presets;
gchar *key;
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
goto no_presets;
key = g_strdup_printf ("_meta/%s", tag);
if (value && *value) {
g_key_file_set_value (presets, name, key, value);
} else {
g_key_file_remove_key (presets, name, key, NULL);
}
g_free (key);
/* save updated keyfile */
return gst_preset_default_save_presets_file (preset);
/* ERRORS */
no_presets:
{
GST_WARNING_OBJECT (preset, "no presets");
return FALSE;
}
}
/* delete a group from the keyfile */
static gboolean
gst_preset_default_delete_preset (GstPreset * preset, const gchar * name)
{
GKeyFile *presets;
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
goto no_presets;
/* get the group */
if (!g_key_file_has_group (presets, name))
goto no_group;
/* remove the group */
g_key_file_remove_group (presets, name, NULL);
/* save updated version */
return gst_preset_default_save_presets_file (preset);
/* ERRORS */
no_presets:
{
GST_WARNING_OBJECT (preset, "no presets");
return FALSE;
}
no_group:
{
GST_WARNING_OBJECT (preset, "no preset named %s", name);
return FALSE;
}
}
/* copies all keys and comments from one group to another, deleting the old
* group. */
static gboolean
gst_preset_default_rename_preset (GstPreset * preset, const gchar * old_name,
const gchar * new_name)
{
GKeyFile *presets;
gchar *str;
gchar **keys;
gsize i, num_keys;
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
goto no_presets;
if (!g_key_file_has_group (presets, old_name))
goto no_group;
/* copy group comment if there is any */
if ((str = g_key_file_get_comment (presets, old_name, NULL, NULL))) {
g_key_file_set_comment (presets, new_name, NULL, str, NULL);
g_free (str);
}
/* get all keys from the old group and copy them in the new group */
keys = g_key_file_get_keys (presets, old_name, &num_keys, NULL);
for (i = 0; i < num_keys; i++) {
/* copy key comment if there is any */
if ((str = g_key_file_get_comment (presets, old_name, keys[i], NULL))) {
g_key_file_set_comment (presets, new_name, keys[i], str, NULL);
g_free (str);
}
/* copy key value */
str = g_key_file_get_value (presets, old_name, keys[i], NULL);
g_key_file_set_value (presets, new_name, keys[i], str);
g_free (str);
}
g_strfreev (keys);
/* remove old group */
g_key_file_remove_group (presets, old_name, NULL);
/* save updated version */
return gst_preset_default_save_presets_file (preset);
/* ERRORS */
no_presets:
{
GST_WARNING_OBJECT (preset, "no presets");
return FALSE;
}
no_group:
{
GST_WARNING_OBJECT (preset, "no preset named %s", old_name);
return FALSE;
}
}
/* save the preset with the given name */
static gboolean
gst_preset_default_save_preset (GstPreset * preset, const gchar * name)
{
GKeyFile *presets;
gchar **props;
guint i;
GObjectClass *gclass;
gboolean is_child_proxy;
GST_INFO_OBJECT (preset, "saving new preset: %s", name);
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
goto no_presets;
/* take copies of current gobject properties from preset */
if (!(props = gst_preset_get_property_names (preset)))
goto no_properties;
gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (preset));
is_child_proxy = GST_IS_CHILD_PROXY (preset);
/* loop over the object properties and store the property value in the
* keyfile */
for (i = 0; props[i]; i++) {
GValue gvalue = { 0, };
gchar *str;
GParamSpec *property = NULL;
if (is_child_proxy) {
gst_child_proxy_lookup ((GstChildProxy *) preset, props[i], NULL,
&property);
} else {
property = g_object_class_find_property (gclass, props[i]);
}
if (!property) {
/* the element said it supported the property but then it does not have
* that property. This should not happen. */
GST_WARNING_OBJECT (preset, "property '%s' not in object", props[i]);
continue;
}
g_value_init (&gvalue, property->value_type);
if (is_child_proxy) {
gst_child_proxy_get_property ((GstChildProxy *) preset, props[i],
&gvalue);
} else {
g_object_get_property ((GObject *) preset, props[i], &gvalue);
}
if ((str = gst_value_serialize (&gvalue))) {
g_key_file_set_string (presets, name, props[i], (gpointer) str);
g_free (str);
} else {
GST_WARNING_OBJECT (preset, "serialization for property '%s' failed",
props[i]);
}
g_value_unset (&gvalue);
}
GST_INFO_OBJECT (preset, " saved");
g_strfreev (props);
/* save updated version */
return gst_preset_default_save_presets_file (preset);
/* ERRORS */
no_presets:
{
GST_WARNING_OBJECT (preset, "no presets");
return FALSE;
}
no_properties:
{
GST_INFO_OBJECT (preset, "no properties");
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_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;
}
/* 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;
}
