基-二类FFT的C++实现

本来是可以发文本的，但是嘛......该死的粘贴出来格式全没了，于是只好转换成图片来发了。
我菜的很，固然写的不怎么好，如果有错误请亲指出一下我好改正。
然后呢，这里面又扯数学又扯编程的，实在不知道发哪里了，望好心人移动一下帮忙
嗯嗯好了开始正文
前段时间做音乐播放的频谱显示，便没办法的去学了下FFT，但是一开始就被数学公式干死了。实在没招，只能拼命百度，最终写出来了（效果如下图，Direct2D绘的）

描述：效果

图片：无标题.png

然后嘛，就简单的写了一下（转换出来的图片您将就看一下了嘛）：

描述：正文

图片：燕 - FFT实现.png

如有不足请指出哈，我太菜了毕竟.......
不过一个人码那个六千多字的图片也是很累人啊，如果有人觉得不错想要转载，还是留下一个出处吧，嘻嘻

emmmm.......好像有人私下给我提分裂基了，我可以说分裂基的过N年再说吗

话说这篇文章是楼主你自己写的嘛？

zill25：话说这篇文章是楼主你自己写的嘛？回到原帖

是的

有什么用吗？

小创创：有什么用吗？回到原帖

你可以拿来做频谱图
或者有比格用法：
AAC压缩
MP3压缩
维纳滤波
感知变换音频编码器
图片水印
听觉模型
以及等等
图像的涉及二维的FFT
然鹅，音频的我只做过频谱

膜拜dalao

开水有前端风险

GloomyGhost：开水有前端风险回到原帖

不啊我就在玩前端

OODLL：不啊我就在玩前端回到原帖

前端dalao

前端dalao太厉害了，佩服  
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