* this audio format. A negative return value indicates that this audio format
* handler did not recognize the given file. On success, the function is
* expected to return a positive value and to fill in \arg info_str, \arg
* this audio format. A negative return value indicates that this audio format
* handler did not recognize the given file. On success, the function is
* expected to return a positive value and to fill in \arg info_str, \arg