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#include "effects/builtin/parametriceqeffect.h"
#include "util/math.h"
namespace {
constexpr int kBandCount = 2;
constexpr double kDefaultCenter1 = 1000; // 1 kHz
constexpr double kDefaultCenter2 = 3000; // 3 kHz
}
// static
QString ParametricEQEffect::getId() {
return "org.mixxx.effects.parametriceq";
}
// static
EffectManifestPointer ParametricEQEffect::getManifest() {
EffectManifestPointer pManifest(new EffectManifest());
pManifest->setId(getId());
pManifest->setName(QObject::tr("Parametric Equalizer"));
pManifest->setShortName(QObject::tr("Param EQ"));
pManifest->setAuthor("The Mixxx Team");
pManifest->setVersion("1.0");
pManifest->setDescription(QObject::tr(
"An gentle 2-band parametric equalizer based on biquad filters.\n"
"It is designed as a complement to the steep mixing equalizers."));
pManifest->setEffectRampsFromDry(true);
pManifest->setIsMasterEQ(true);
EffectManifestParameterPointer gain1 = pManifest->addParameter();
gain1->setId("gain1");
gain1->setName(QObject::tr("Gain 1"));
gain1->setShortName(QObject::tr("Gain 1"));
gain1->setDescription(QObject::tr(
"Gain for Filter 1"));
gain1->setControlHint(EffectManifestParameter::ControlHint::KNOB_LINEAR);
gain1->setSemanticHint(EffectManifestParameter::SemanticHint::UNKNOWN);
gain1->setUnitsHint(EffectManifestParameter::UnitsHint::UNKNOWN);
gain1->setNeutralPointOnScale(0.5);
gain1->setDefault(0);
gain1->setMinimum(-18);
gain1->setMaximum(18); // dB
EffectManifestParameterPointer q1 = pManifest->addParameter();
q1->setId("q1");
q1->setName(QObject::tr("Q 1"));
q1->setShortName(QObject::tr("Q 1"));
q1->setDescription(QObject::tr(
"Controls the bandwidth of Filter 1.\n"
"A lower Q affects a wider band of frequencies,\n"
"a higher Q affects a narrower band of frequencies."));
q1->setControlHint(EffectManifestParameter::ControlHint::KNOB_LINEAR);
q1->setSemanticHint(EffectManifestParameter::SemanticHint::UNKNOWN);
q1->setUnitsHint(EffectManifestParameter::UnitsHint::UNKNOWN);
q1->setNeutralPointOnScale(0.5);
q1->setDefault(1.75);
q1->setMinimum(0.5);
q1->setMaximum(3.0);
EffectManifestParameterPointer center1 = pManifest->addParameter();
center1->setId("center1");
center1->setName(QObject::tr("Center 1"));
center1->setShortName(QObject::tr("Center 1"));
center1->setDescription(QObject::tr(
"Center frequency for Filter 1, from 100 Hz to 14 kHz"));
center1->setControlHint(EffectManifestParameter::ControlHint::KNOB_LOGARITHMIC);
center1->setSemanticHint(EffectManifestParameter::SemanticHint::UNKNOWN);
center1->setUnitsHint(EffectManifestParameter::UnitsHint::HERTZ);
center1->setNeutralPointOnScale(0.5);
center1->setDefault(kDefaultCenter1);
center1->setMinimum(100);
center1->setMaximum(14000);
EffectManifestParameterPointer gain2 = pManifest->addParameter();
gain2->setId("gain2");
gain2->setName(QObject::tr("Gain 2"));
gain2->setShortName(QObject::tr("Gain 2"));
gain2->setDescription(QObject::tr(
"Gain for Filter 2"));
gain2->setControlHint(EffectManifestParameter::ControlHint::KNOB_LINEAR);
gain2->setSemanticHint(EffectManifestParameter::SemanticHint::UNKNOWN);
gain2->setUnitsHint(EffectManifestParameter::UnitsHint::UNKNOWN);
gain2->setNeutralPointOnScale(0.5);
gain2->setDefault(0);
gain2->setMinimum(-18);
gain2->setMaximum(18); // dB
EffectManifestParameterPointer q2 = pManifest->addParameter();
q2->setId("q2");
q2->setName(QObject::tr("Q 2"));
q2->setShortName(QObject::tr("Q 2"));
q2->setDescription(QObject::tr(
"Controls the bandwidth of Filter 2.\n"
"A lower Q affects a wider band of frequencies,\n"
"a higher Q affects a narrower band of frequencies."));
q2->setControlHint(EffectManifestParameter::ControlHint::KNOB_LINEAR);
q2->setSemanticHint(EffectManifestParameter::SemanticHint::UNKNOWN);
q2->setUnitsHint(EffectManifestParameter::UnitsHint::UNKNOWN);
q2->setNeutralPointOnScale(0.5);
q2->setDefault(1.75);
q2->setMinimum(0.5);
q2->setMaximum(3.0);
EffectManifestParameterPointer center2 = pManifest->addParameter();
center2->setId("center2");
center2->setName(QObject::tr("Center 2"));
center2->setShortName(QObject::tr("Center 2"));
center2->setDescription(QObject::tr(
"Center frequency for Filter 2, from 100 Hz to 14 kHz"));
center2->setControlHint(EffectManifestParameter::ControlHint::KNOB_LOGARITHMIC);
center2->setSemanticHint(EffectManifestParameter::SemanticHint::UNKNOWN);
center2->setUnitsHint(EffectManifestParameter::UnitsHint::HERTZ);
center2->setNeutralPointOnScale(0.5);
center2->setDefault(kDefaultCenter2);
center2->setMinimum(100);
center2->setMaximum(14000);
return pManifest;
}
ParametricEQEffectGroupState::ParametricEQEffectGroupState(
const mixxx::EngineParameters& bufferParameters)
: EffectState(bufferParameters) {
for (int i = 0; i < kBandCount; i++) {
m_oldGain.append(1.0);
m_oldQ.append(1.75);
}
m_oldCenter.append(kDefaultCenter1);
m_oldCenter.append(kDefaultCenter2);
// Initialize the filters with default parameters
for (int i = 0; i < kBandCount; i++) {
m_bands.push_back(std::make_unique<EngineFilterBiquad1Peaking>(
bufferParameters.sampleRate(), m_oldCenter[i], m_oldQ[i]));
}
}
void ParametricEQEffectGroupState::setFilters(int sampleRate) {
for (int i = 0; i < kBandCount; i++) {
m_bands[i]->setFrequencyCorners(
sampleRate, m_oldCenter[i], m_oldQ[i], m_oldGain[i]);
}
}
ParametricEQEffect::ParametricEQEffect(EngineEffect* pEffect)
: m_oldSampleRate(44100) {
m_pPotGain.append(pEffect->getParameterById("gain1"));
m_pPotQ.append(pEffect->getParameterById("q1"));
m_pPotCenter.append(pEffect->getParameterById("center1"));
m_pPotGain.append(pEffect->getParameterById("gain2"));
m_pPotQ.append(pEffect->getParameterById("q2"));
m_pPotCenter.append(pEffect->getParameterById("center2"));
}
ParametricEQEffect::~ParametricEQEffect() {
}
void ParametricEQEffect::processChannel(const ChannelHandle& handle,
ParametricEQEffectGroupState* pState,
const CSAMPLE* pInput, CSAMPLE* pOutput,
const mixxx::EngineParameters& bufferParameters,
const EffectEnableState enableState,
const GroupFeatureState& groupFeatures) {
Q_UNUSED(handle);
Q_UNUSED(groupFeatures);
// If the sample rate has changed, initialize the filters using the new
// sample rate
if (m_oldSampleRate != bufferParameters.sampleRate()) {
m_oldSampleRate = bufferParameters.sampleRate();
pState->setFilters(bufferParameters.sampleRate());
}
CSAMPLE_GAIN fGain[2];
CSAMPLE_GAIN fQ[2];
CSAMPLE_GAIN fCenter[2];
for (int i = 0; i < kBandCount; i++) {
if (enableState == EffectEnableState::Disabling) {
// Ramp to dry, when disabling, this will ramp from dry when enabling as well
fGain[i] = 1.0;
} else {
fGain[i] = m_pPotGain[i]->value();
}
fQ[i] = m_pPotQ[i]->value();
fCenter[i] = m_pPotCenter[i]->value();
if (fGain[i] != pState->m_oldGain[i] ||
fQ[i] != pState->m_oldQ[i] ||
fCenter[i] != pState->m_oldCenter[i]) {
pState->m_bands[i]->setFrequencyCorners(
bufferParameters.sampleRate(), fCenter[i], fQ[i], fGain[i]);
}
}
if (fGain[0]) {
pState->m_bands[0]->process(pInput, pOutput, bufferParameters.samplesPerBuffer());
if (fGain[1]) {
pState->m_bands[1]->process(pOutput, pOutput, bufferParameters.samplesPerBuffer());
} else {
pState->m_bands[1]->pauseFilter();
}
} else {
pState->m_bands[0]->pauseFilter();
if (fGain[1]) {
pState->m_bands[1]->process(pInput, pOutput, bufferParameters.samplesPerBuffer());
} else {
pState->m_bands[1]->pauseFilter();
SampleUtil::copy(pOutput, pInput, bufferParameters.samplesPerBuffer());
}
}
for (int i = 0; i < kBandCount; i++) {
pState->m_oldGain[i] = fGain[i];
pState->m_oldQ[i] = fQ[i];
pState->m_oldCenter[i]
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