format  Sint32 STM_Recover (void)
 Input  None
 Output  None
 Function value  STM_ERR_OK: Successful recovery
:  STM_ERR_CDRD: Recovery failure
 Function  If a read error occurs, playback is forcibly continued.
 Remarks  Used in the error function as follows. 

  void errfunc (void * obj, Sint32 ec)
  {
  if (ec == STM_ERR_CDRD) {
  STM_Recover ();
 } else {
 
 
 
 }
 }