comparison examples/audio_in_FFT/render.cpp @ 372:db2fe4e1b88e prerelease

Doxygen content added to each example render.cpp.
References to AnalogReadFrame etc. removed from doxygen content.

+/*
+ ____  _____ _        _    
+| __ )| ____| |      / \   
+|  _ \|  _| | |     / _ \  
+| |_) | |___| |___ / ___ \ 
+|____/|_____|_____/_/   \_\.io
+
+ */
+
 /*
  * render.cpp
  *
  *  Created on: Oct 24, 2014
  *      Author: parallels
  */
 
+/**
+\example 4_audio_FFT
+
+Fast Fourier Transform
+----------------------
+
+This sketch performs an FFT (Fast Fourier Transform) on incoming audio. It uses 
+the NE10 library, included at the top of the file (line 11).
+
+Read the documentation on the NE10 library [here](http://projectne10.github.io/Ne10/doc/annotated.html).
+
+The variables `timeDomainIn`, `timeDomainOut` and `frequencyDomain` are 
+variables of the struct `ne10_fft_cpx_float32_t` [http://projectne10.github.io/Ne10/doc/structne10__fft__cpx__float32__t.html](http://projectne10.github.io/Ne10/doc/structne10__fft__cpx__float32__t.html). 
+These are declared at the top of the file (line 21), and memory is allocated 
+for them in `setup()` (line 41).
+
+In `render()` a `for` loop performs the FFT which is performed on each sample, 
+and the resulting output is placed on each channel.
+*/
 
 #include <Bela.h>
 #include <rtdk.h>
 #include <NE10.h>					// neon library
 #include <cmath>