Using Arduino Audio Tools header files across multiple compilation units in PlatformIO

[nullpainter]

Caveat: I am a C# developer and am still a bit fuzzy with C++, so apologies for any misunderstandings, incorrect terminology, etc.

I am using Arduino Audio Tools to process an I2S stream for FFT-based visualisation on a RGB matrix. I am using PlatformIO and have a reference to an AudioRealFFT object in a constructor for one of my classes.

FFTDisplay.h is included in both my main.cpp and in a header file for a class containing my visualisation code. As FFTDisplay.h contains not only the class definition but also implementations, I'm receiving a multiple definition error from the linker for the selfFFTDisplay pointer initialized in this header.

Short of copying this header file locally and splitting it out into a header + cpp file, is there a recommended approach to manage this?

[pschatzmann]

I committed a correction

[nullpainter]

Amazing, thank you!