struct check_wav_context *check_wav_init(struct btr_node *parent,
struct btr_node *child, struct wav_params *params,
struct btr_node **cw_btrn);
struct check_wav_context *check_wav_init(struct btr_node *parent,
struct btr_node *child, struct wav_params *params,
struct btr_node **cw_btrn);