audioprocessor.h

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// SPDX-License-Identifier: AGLP-3.0-or-later
 
#ifndef __AUDIOPROCESSOR_H
#define __AUDIOPROCESSOR_H
 
#include <cstdint>
#include <string>
 
class cAudioProcessor {
public:
    cAudioProcessor(const int);
 
    void Normalize(uint16_t *, int);
    void SetNormalizer(int);
    void ResetNormalizer(void);
 
    void Compress(uint16_t *, int);
    void SetCompressor(int);
    void ResetCompressor(void);
 
    void SetEqualizer(int[18]);
    std::string GetEqualizerOptions(void) const;
 
    void Amplify(int16_t *, int, int);
    void SetAmplifier(int volume) { m_amplifier = volume; };
 
private:
    const int m_bytesPerSample;
 
    // Normalizer
    constexpr static int NORMALIZE_MAX_INDEX = 128;       
    constexpr static int NORMALIZE_SAMPLES = 4096;        
    constexpr static int NORMALIZE_DEFAULT_FACTOR = 1000; 
    constexpr static int NORMALIZE_MIN_FACTOR = 100;      
    int m_normalizeCounter;                 
    uint32_t m_normalizeAverage[NORMALIZE_MAX_INDEX]; 
    int m_normalizeIndex;                   
    int m_normalizeReady;                   
    int m_normalizeFactor;                  
    int m_normalizeMaxFactor;               
 
    // Compressor
    constexpr static int COMPRESSION_DEFAULT_FACTOR = 1000;     
    constexpr static int COMPRESSION_DEFAULT_MAX_FACTOR = 2000; 
    int m_compressionFactor = 0;            
    int m_compressionMaxFactor;             
 
    // Equalizer
    float m_equalizerBand[18];              
 
    // Amplifier
    int m_amplifier;                        
};
 
#endif