Line data    Source code

       1             : #pragma once
       2             : 
       3             : class Chirp {
       4             : 
       5             : public:
       6             : 
       7             :     // constructor
       8             :     Chirp();
       9             : 
      10             :     // initializes the chirp object
      11             :     void init(float time_record, float frequency_start_hz, float frequency_stop_hz, float time_fade_in, float time_fade_out, float time_const_freq);
      12             : 
      13             :     // determine chirp signal output at the specified time and amplitude
      14             :     float update(float time, float waveform_magnitude);
      15             : 
      16             :     // accessor for the current waveform frequency
      17     1042608 :     float get_frequency_rads() {return waveform_freq_rads; }
      18             : 
      19             :     // Return true if chirp is completed
      20           0 :     bool completed() const { return complete; }
      21             : 
      22             : private:
      23             :     // Total chirp length in seconds
      24             :     float record;
      25             : 
      26             :     // Chirp oscillation amplitude
      27             :     float magnitude;
      28             : 
      29             :     // Chirp start frequency in rad/s
      30             :     float wMin;
      31             : 
      32             :     // Chirp end frequency in rad/s
      33             :     float wMax;
      34             : 
      35             :     // Amplitude fade in time in seconds
      36             :     float fade_in;
      37             : 
      38             :     // Amplitude fade out time in seconds
      39             :     float fade_out;
      40             : 
      41             :     // Time that chirp will remain at the min frequency before increasing to max frequency
      42             :     float const_freq;
      43             : 
      44             :     // frequency ratio
      45             :     float B;
      46             : 
      47             :     // current waveform frequency in rad/s
      48             :     float waveform_freq_rads;
      49             : 
      50             :     // current amplitude of chirp
      51             :     float window;
      52             : 
      53             :     // output of chirp signal at the requested time
      54             :     float output;
      55             : 
      56             :     // True if chirp is complete, reset to false on init
      57             :     bool complete;
      58             : 
      59             : };