50 lines
1.0 KiB
C++
50 lines
1.0 KiB
C++
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#ifndef OPENAV_DSP_SIDECHAIN_GAIN_H
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#define OPENAV_DSP_SIDECHAIN_GAIN_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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class SidechainGain
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{
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public:
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SidechainGain(int rate);
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~SidechainGain(){}
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void threshold(float t){controlThreshold = t;}
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void reduction(float r){controlReduction = r;}
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void time (float t){controlReleaseTime = t;}
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void process(unsigned int n_samples, float** inputs, float** outputs);
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private:
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/// audio buffers
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float* audioInputL;
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float* audioInputR;
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float* audioSidechain;
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float* audioOutputL;
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float* audioOutputR;
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/// control signals
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float controlThreshold;
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float controlReduction;
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float controlReleaseTime;
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float controlSidechainAmp;
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/// filter state
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float w, a, b, g1, g2;
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/// last peak history
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bool nowIsAPeak;
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long peakFrameCounter;
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/// nframes available for countdown
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long peakCountDuration;
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/// control output
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float currentTarget;
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};
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#endif // OPENAV_DSP_SIDECHAIN_GAIN_H
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