AnalogTapeModel

Physical modelling signal processing for analog tape recording
Log | Files | Refs | Submodules | README | LICENSE

DegradeNoise.h (1058B)

      1 #ifndef DEGRADENOISE_H_INCLUDED
      2 #define DEGRADENOISE_H_INCLUDED
      3 
      4 #include "JuceHeader.h"
      5 
      6 /** Noise for tape degrade effect */
      7 class DegradeNoise
      8 {
      9 public:
     10     DegradeNoise() = default;
     11     DegradeNoise (DegradeNoise&&) noexcept = default;
     12 
     13     void setGain (float newGain) { curGain = newGain; }
     14 
     15     void prepare()
     16     {
     17         prevGain = curGain;
     18     }
     19 
     20     void processBlock (float* buffer, int numSamples)
     21     {
     22         if (curGain == prevGain)
     23         {
     24             for (int n = 0; n < numSamples; ++n)
     25                 buffer[n] += (random.nextFloat() - 0.5f) * curGain;
     26         }
     27         else
     28         {
     29             for (int n = 0; n < numSamples; ++n)
     30                 buffer[n] += (random.nextFloat() - 0.5f) * ((curGain * (float) n / (float) numSamples) + (prevGain * (1.0f - (float) n / (float) numSamples)));
     31 
     32             prevGain = curGain;
     33         }
     34     }
     35 
     36 private:
     37     float curGain = 0.0f;
     38     float prevGain = curGain;
     39 
     40     Random random;
     41 
     42     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (DegradeNoise)
     43 };
     44 
     45 #endif // DEGRADENOISE_H_INCLUDED