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/**
bespoke synth, a software modular synthesizer
Copyright (C) 2021 Ryan Challinor (contact: awwbees@gmail.com)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
//
// PeakTracker.cpp
// modularSynth
//
// Created by Ryan Challinor on 1/4/14.
//
//
#include "PeakTracker.h"
#include "SynthGlobals.h"
#include "Profiler.h"
void PeakTracker::Process(float* buffer, int bufferSize)
{
PROFILER(PeakTracker);
for (int j = 0; j < bufferSize; ++j)
{
float scalar = powf(0.5f, 1.0f / (mDecayTime * gSampleRate));
float input = fabsf(buffer[j]);
if (input >= mPeak)
{
/* When we hit a peak, ride the peak to the top. */
mPeak = input;
if (mLimit > std::numeric_limits<float>::epsilon() && mPeak >= mLimit)
{
mPeak = mLimit;
mHitLimitTime = gTime;
}
}
else
{
/* Exponential decay of output when signal is low. */
mPeak = mPeak * scalar;
if (mPeak < std::numeric_limits<float>::epsilon())
mPeak = 0.0;
}
}
}
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