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当做FFT的点数不是2的次幂时,如何使用DSPF_sp_fftSPxSP这个函数,或者可以调用哪一个库函数来实现?



void  DSPF_sp_fftSPxSP (int N, float *ptr_x, float *ptr_w, float *ptr_y, unsigned char *brev, int n_min, int offset, int n_max)

文档中说N needs to be power of 2 ,如果N不是2的次幂,比如26时,应该怎么办。