static void linphone_gtk_call_state_changed(LinphoneCore *lc, LinphoneCall *call, LinphoneCallState cs, const char *msg);
static void linphone_gtk_call_encryption_changed(LinphoneCore *lc, LinphoneCall *call, bool_t enabled, const char *token);
static void linphone_gtk_transfer_state_changed(LinphoneCore *lc, LinphoneCall *call, LinphoneCallState cstate);
static void linphone_gtk_call_state_changed(LinphoneCore *lc, LinphoneCall *call, LinphoneCallState cs, const char *msg);
static void linphone_gtk_call_encryption_changed(LinphoneCore *lc, LinphoneCall *call, bool_t enabled, const char *token);
static void linphone_gtk_transfer_state_changed(LinphoneCore *lc, LinphoneCall *call, LinphoneCallState cstate);