Method setSample

src/fl/audio/audio_context.cpp.hpp:132–162

}

void Context::setSample(const Sample& sample) {
    // Save current fft::FFT to history (use first cached entry if available)
    if (!mFFTCache.empty() && mFFTHistoryDepth > 0) {
        const shared_ptr<fft::Bins>& first = mFFTCache[0].bins;
        if (first) {
            if (static_cast<int>(mFFTHistory.size()) < mFFTHistoryDepth) {
                mFFTHistory.push_back(*first);
                // When the history fills up, wrap index to 0 for ring buffer mode
                mFFTHistoryIndex = static_cast<int>(mFFTHistory.size()) % mFFTHistoryDepth;
            } else {
                mFFTHistory[mFFTHistoryIndex] = *first;
                mFFTHistoryIndex = (mFFTHistoryIndex + 1) % mFFTHistoryDepth;
            }
        }
    }

    // Recycle bins that only the cache holds (use_count == 1).
    // These can be reused next frame without allocation.
    mRecyclePool.clear();
    for (size i = 0; i < mFFTCache.size(); i++) {
        if (mFFTCache[i].bins.use_count() == 1) {
            mRecyclePool.push_back(fl::move(mFFTCache[i].bins));
        }
    }

    mSample = sample;
    // Clear per-frame fft::FFT cache (new sample = new data)
    mFFTCache.clear();
    // Reset silence flag — pipeline must re-populate after NFT update this frame.
    mIsSilent = false;
}

void Context::clearCache() {
    mFFTCache.clear();