This performs the inverse FFT on freqdata and puts the result in timedata.
freqdata must have len/2 + 1 samples, where len is the parameter specified while allocating the
S16 instance with S16.
timedata must be large enough to hold len time domain samples.
| this |
S16 instance for this call |
| freqdata |
Buffer of the samples in the frequency domain |
| timedata |
Target buffer for the samples in the time domain |