fft_next_fast_length
Description:
Returns the next number to n that is entirely a product of 2, 3 and 5.
 Using this as the len parameter for the different GstFFT types will provide the best performance.
Parameters:
| n | 
           Number for which the next fast length should be returned  | 
      
Returns:
| 
           the next fast FFT length.  | 
      
Namespace: Gst.FFT
  
  Package: gstreamer-fft-1.0