Method update

src/fl/audio/detector/pitch.cpp.hpp:32–71

Pitch::~Pitch() FL_NOEXCEPT = default;

void Pitch::update(shared_ptr<Context> context) {
    // Get PCM data from context
    span<const i16> pcm = context->getPCM();
    size numSamples = pcm.size();

    // Compute dt from actual audio buffer duration
    mLastDt = computeAudioDt(pcm.size(), static_cast<int>(mSampleRate));

    // Need at least 2x max period for autocorrelation
    if (numSamples < static_cast<size>(mMaxPeriod * 2)) {
        // Not enough samples for reliable pitch detection
        mConfidence = 0.0f;
        mIsVoiced = false;

        mVoicedStateChanged = (mIsVoiced != mPreviousVoiced);
        return;
    }

    // Calculate autocorrelation and find pitch
    float detectedPitch = calculateAutocorrelation(pcm.data(), numSamples);

    // Check if pitch is valid and confidence is sufficient
    if (detectedPitch > 0.0f && mConfidence >= mConfidenceThreshold) {
        mIsVoiced = true;
        mCurrentPitch = detectedPitch;
        updatePitchSmoothing(detectedPitch);
        mFirePitch = true;

        if (shouldReportPitchChange(detectedPitch)) {
            mFirePitchChange = true;
            mPreviousPitch = detectedPitch;
        }
    } else {
        mIsVoiced = false;
        mCurrentPitch = 0.0f;
        mFirePitch = false;
    }

    mVoicedStateChanged = (mIsVoiced != mPreviousVoiced);
}

void Pitch::fireCallbacks() {
    if (mFirePitch) {