#pragma once
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#include <cmath>
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/**
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* Envelope Detector Class
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*/
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template <typename SampleType>
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class EnvelopeDetector
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{
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public:
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/**
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* @brief Constructor
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*
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*/
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EnvelopeDetector();
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/**
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* @brief Prepares object for processing
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*
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* @param sampleRate Current sampling rate
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*/
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void prepare(SampleType sampleRate);
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/**
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* @brief Processes a single sample
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*
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* @param input Input sample
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*/
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SampleType processSample(SampleType input);
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/**
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* @brief Sets the attack time of the Envelope Detector object
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*
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* @param newValue New attack time in milliseconds
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*/
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void setAttackTime(SampleType newValue);
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/**
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* @brief Returns the attack time parameter value of the Envelope Detector object
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*/
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SampleType getAttackTime();
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/**
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* @brief Sets the release time of the Envelope Detector object
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*
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* @param newValue New Release time in milliseconds
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*/
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void setReleaseTime(SampleType newValue);
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/**
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* @brief Returns the release time parameter value of the Envelope Detector object
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*
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* @return SampleType
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*/
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SampleType getReleaseTime();
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/**
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* @brief Sets the detection mode of the Envelope Detector object
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*
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* @param index Detection mode index
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*/
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void setDetectionMode(int index);
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/**
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* @brief Returns the detection mode index of the Envelope Detector object
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*/
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int getDetectionMode();
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/**
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* @brief Sets the envelope detector in dB or linear output mode
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*
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* @param outputIndB Should output be in dB boolean.
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* True = db Output, False = Linear Output
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*/
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void setOutputIndB(bool outputIndB);
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/**
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* @brief Returns Envelope Detector detection mode
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*
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* @return true dB output
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* @return false Linear output
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*/
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bool isOutputIndB();
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enum DetectionModes
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{
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Peak = 0,
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MS, //Mean Square
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RMS //Root Mean Square
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};
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private:
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SampleType sampleRate{ 44100.0 };
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//User Parameters
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SampleType attackTime{ 0.0 }; //In ms
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SampleType releaseTime{ 0.0 }; //In ms
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int detectionMode{DetectionModes::Peak};
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SampleType attackTimeCoeff{ 0.0 };
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SampleType releaseTimeCoeff{ 0.0 };
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bool output_In_dB{false};
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const double rc_atc = -0.99967234081320612357829304641019; //RC filter analog time constant
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SampleType previousValue{0.0}; //Envelope value for the previous sample
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void setSampleRate(SampleType sampleRate);
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};
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