KwidgetProcessor_Lfo.cpp

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namespace krotos
{
    KwidgetProcessor_Lfo::KwidgetProcessor_Lfo(Kwidget& owner) : KwidgetProcessor(owner)
    {
        addParameterAttachments({{Parameters::Frequency, [this](float x) { setFrequency(x); }, 4}});
 
        addModulator(true);
    }
 
    void KwidgetProcessor_Lfo::setFrequency(float f)
    {
        m_frequency = f;
        m_phaseDelta = MathConstants<float>::twoPi * f / static_cast<float>(m_sampleRate);
    }
 
    void KwidgetProcessor_Lfo::prepare(double sampleRate, int samplesPerBlock)
    {
        m_sampleRate = sampleRate;
        m_buffer.setSize(1, samplesPerBlock);
 
        getModulator(0)->setValues(m_buffer.getReadPointer(0), samplesPerBlock);
    }
 
    void KwidgetProcessor_Lfo::process(AudioBuffer<float>& buffer)
    {
        auto numSamples = buffer.getNumSamples();
        auto bufferPtr = m_buffer.getWritePointer(0);
 
        nextBlock(numSamples);
 
        for (int i = 0; i < numSamples; i++)
        {
            nextSample();
 
            // get output sample
            float sample = std::sin(m_phase);
            bufferPtr[i] = 0.5f * (sample + 1.0f);
 
            // increment phase
            m_phase = std::fmod(m_phase + m_phaseDelta, MathConstants<float>::twoPi);
        }
    }
} // namespace krotos