matlab how to generate pitch.m C/C++ code with coder

one of module call pitch.m as follow

f0 = pitch(sig1, fs, 'WindowLength', round(fs .* 0.05), 'OverlapLength', round(fs * (0.05 - 0.025)));

but coder failed to generate C/C++ code. error message as follow:

Failed to compute constant value for nontunable property 'WindowLength'. In code generation, nontunable properties can only be assigned constant values.

Answer 1

[Walter Roberson]

You will need to have a switch statement on every fs that you wish to permit, each time calling with a hard-coded WindowLength. So for example you might have a branch for 8000, another for 11025, another for 12000, another for 22050, another for 24000, another for 44100, another for 48000, and so on.

[大大 习]

It works. That's pretty odd. But it works.