29 lines
699 B
C++
29 lines
699 B
C++
#include "dsp.h"
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#include "limiter.h"
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#define SLOPE(out, in, positive, negative) \
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{ \
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float error = (in)-out; \
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out += (error > 0 ? positive : negative) * error; \
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}
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namespace daisysp
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{
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void Limiter::Init()
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{
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peak_ = 0.5f;
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}
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void Limiter::ProcessBlock(float *in, size_t size, float pre_gain)
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{
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while(size--)
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{
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float pre = *in * pre_gain;
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float peak = fabsf(pre);
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SLOPE(peak_, peak, 0.05f, 0.00002f);
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float gain = (peak_ <= 1.0f ? 1.0f : 1.0f / peak_);
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*in++ = SoftLimit(pre * gain * 0.7f);
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}
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}
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} //namespace daisysp
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