52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
#include "stdafx.h"
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#include "Equalizer.h"
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#include "orfanidis_eq.h"
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void Equalizer::ApplyEqualizer(uint32_t sampleCount, int16_t* samples)
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{
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double outL, outR;
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for (uint32_t i = 0; i < sampleCount; i++)
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{
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double inL = samples[i * 2];
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double inR = samples[i * 2 + 1];
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_equalizerLeft->sbs_process(&inL, &outL);
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_equalizerRight->sbs_process(&inR, &outR);
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samples[i * 2] = (int16_t)std::max(std::min(outL, 32767.0), -32768.0);
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samples[i * 2 + 1] = (int16_t)std::max(std::min(outR, 32767.0), -32768.0);
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}
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}
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void Equalizer::UpdateEqualizers(vector<double> bandGains, uint32_t sampleRate)
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{
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if (_prevSampleRate != sampleRate || memcmp(bandGains.data(), _prevEqualizerGains.data(),
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bandGains.size() * sizeof(double)) != 0)
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{
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vector<double> bands = {
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40, 56, 80, 113, 160, 225, 320, 450, 600, 750, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 10000, 12500, 13000
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};
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bands.insert(bands.begin(), bands[0] - (bands[1] - bands[0]));
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bands.insert(bands.end(), bands[bands.size() - 1] + (bands[bands.size() - 1] - bands[bands.size() - 2]));
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_eqFrequencyGrid.reset(new orfanidis_eq::freq_grid());
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for (size_t i = 1; i < bands.size() - 1; i++)
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{
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_eqFrequencyGrid->add_band((bands[i] + bands[i - 1]) / 2, bands[i], (bands[i + 1] + bands[i]) / 2);
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}
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_equalizerLeft.reset(new orfanidis_eq::eq1(_eqFrequencyGrid.get(), orfanidis_eq::filter_type::butterworth));
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_equalizerRight.reset(new orfanidis_eq::eq1(_eqFrequencyGrid.get(), orfanidis_eq::filter_type::butterworth));
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_equalizerLeft->set_sample_rate(sampleRate);
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_equalizerRight->set_sample_rate(sampleRate);
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for (unsigned int i = 0; i < _eqFrequencyGrid->get_number_of_bands(); i++)
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{
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_equalizerLeft->change_band_gain_db(i, bandGains[i]);
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_equalizerRight->change_band_gain_db(i, bandGains[i]);
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}
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_prevSampleRate = sampleRate;
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_prevEqualizerGains = bandGains;
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}
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}
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