DSP FFT Library

Content
	Complex FFT Functions
	Real FFT Functions

Description

The yun voice DSP FFT library is specified for YunVoice project, which is derived from FFT functions in Transform Functions. So, the introductions here will be brief, and will aim at the difference from the original version. More details can be seen in Transform Functions.

This library includes rfft(irfft) and cfft(icfft) functions, which are used to handle real data and complex data respectively. And there are separate algorithms to handle Q15 and Q31 data as well. Finally, the lengths of data supported in this library are[32, 64, 128, 256, 512, 1024].