KwidgetProcessor_Sine.cpp

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namespace krotos
{
    KwidgetProcessor_Sine::KwidgetProcessor_Sine(Kwidget& owner) : KwidgetProcessor(owner)
    {
        addParameterAttachments({{Parameters::Amplitude, nullptr, -1}});
    }
 
    void KwidgetProcessor_Sine::prepare(double sampleRate, int /*samplesPerBlock*/) { m_sampleRate = sampleRate; }
 
    void KwidgetProcessor_Sine::process(AudioBuffer<float>& buffer)
    {
        auto numSamples = buffer.getNumSamples();
        auto numChannels = buffer.getNumChannels();
        auto bufferPtr = buffer.getArrayOfWritePointers();
 
        nextBlock(numSamples);
 
        auto amp = getAttachment(Parameters::Amplitude)->data();
 
        for (int i = 0; i < numSamples; i++)
        {
            nextSample();
 
            // get output sample
            float sample = std::sin(m_phase);
            for (int j = 0; j < numChannels; j++)
                bufferPtr[j][i] = sample * amp[i];
 
            // increment phase
            m_phase = std::fmod(m_phase + m_phaseDelta, MathConstants<float>::twoPi);
        }
    }
 
    void KwidgetProcessor_Sine::setFrequency(float f)
    {
        m_frequency = f;
        m_phaseDelta = MathConstants<float>::twoPi * f / static_cast<float>(m_sampleRate);
    }
} // namespace krotos