一个DELPHI写的push filter，供需要写filter的人学习。d7开发。-a directshow push filter, code language is object delphi.if you want to know how to create a push filter,you can use it.

用Delphi开发的directshow 过滤器（filter）的源码，带已编释AX的档案。 功能：可实现现时的edge detection过滤。-Developed by Delphi DirectShow filter (filter) the source, has been released with AX files. Function: to achieve the edge detection filter.