M1DSPUtilities.h

//  Mach1 Spatial SDK
//  Copyright © 2017-2021 Mach1. All rights reserved.
 
#pragma once
 
#include <math.h>
#include <vector>
 
namespace M1DSP {
namespace Utilities {
/*
 Mach1 Spatial Downmix Checker
 
 Description:
 This class contains tools to compare difference of signal between top and bottom of soundfield.
 If soundfield top/bottom difference is less than the input correlation threshold the soundfield
 will be safely downmixed to the lowest Mach1 format.
 
 `threshold` value range = 0.0f [0% signal difference] -> 1.0f [100% signal difference]
 */
 
class CSpatialDownmixChecker {
    std::vector<float> sumSample;
    float threshold;
    int totalSamples;
 
  public:
    void Setup(float threshold = 0.1);
    void ProcessBuffer(float **buffer, int bufferSize);
    std::vector<float> getAvgSamplesDiff();
    bool bShouldDownmix();
};
} // namespace Utilities
} // namespace M1DSP