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 gboolean linphone_gtk_auto_answer(LinphoneCall *call);
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 gboolean linphone_gtk_auto_answer(LinphoneCall *call);