(0_14 branch only) adding compatibility for building with upstream ar…

…duinoFFT 2.xx

support compilation with new arduinoFFT versions 2.x

usermods/audioreactive/audio_reactive.h

@@ -177,9 +177,6 @@ constexpr uint16_t samplesFFT_2 = 256;          // meaningfull part of FFT resul
 // These are the input and output vectors.  Input vectors receive computed results from FFT.
 static float vReal[samplesFFT] = {0.0f};       // FFT sample inputs / freq output -  these are our raw result bins
 static float vImag[samplesFFT] = {0.0f};       // imaginary parts
-#ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
-static float windowWeighingFactors[samplesFFT] = {0.0f};
-#endif
 
 // Create FFT object
 #ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
@@ -198,9 +195,15 @@ static float windowWeighingFactors[samplesFFT] = {0.0f};
 #include <arduinoFFT.h>
 
 #ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
-static ArduinoFFT<float> FFT = ArduinoFFT<float>( vReal, vImag, samplesFFT, SAMPLE_RATE, windowWeighingFactors);
+#if defined(FFT_LIB_REV) && FFT_LIB_REV > 0x19
+  // arduinoFFT 2.x has a slightly different API
+  static ArduinoFFT<float> FFT = ArduinoFFT<float>( vReal, vImag, samplesFFT, SAMPLE_RATE, true);
+#else
+  static float windowWeighingFactors[samplesFFT] = {0.0f}; // cache for FFT windowing factors
+  static ArduinoFFT<float> FFT = ArduinoFFT<float>( vReal, vImag, samplesFFT, SAMPLE_RATE, windowWeighingFactors);
+#endif
 #else
-static arduinoFFT FFT = arduinoFFT(vReal, vImag, samplesFFT, SAMPLE_RATE);
+  static arduinoFFT FFT = arduinoFFT(vReal, vImag, samplesFFT, SAMPLE_RATE);
 #endif
 
 // Helper functions
@@ -300,7 +303,12 @@ void FFTcode(void * parameter)
 #endif
 
 #ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
+    #if defined(FFT_LIB_REV) && FFT_LIB_REV > 0x19
+      // arduinoFFT 2.x has a slightly different API
+      FFT.majorPeak(&FFT_MajorPeak, &FFT_Magnitude);                // let the effects know which freq was most dominant
+    #else
       FFT.majorPeak(FFT_MajorPeak, FFT_Magnitude);                // let the effects know which freq was most dominant
+    #endif
 #else
       FFT.MajorPeak(&FFT_MajorPeak, &FFT_Magnitude);              // let the effects know which freq was most dominant
 #endif

usermods/audioreactive/readme.md

@@ -38,7 +38,7 @@ Alternatively, you can use the latest arduinoFFT development version.
 ArduinoFFT `develop` library is slightly more accurate, and slightly faster than our customised library, however also needs additional 2kB RAM.
 
 * `build_flags` = `-D USERMOD_AUDIOREACTIVE` `-D UM_AUDIOREACTIVE_USE_NEW_FFT`
-* `lib_deps`= `https://github.com/kosme/arduinoFFT#develop @ 1.9.2`
+* `lib_deps`= `https://github.com/kosme/arduinoFFT#419d7b0`
 
 ## Configuration