Function fadeInStereoFloatFront

src/core/AudioEngine.cpp:213–233

}

void fadeInStereoFloatFront(QByteArray& buffer, int sampleRate)
{
    constexpr qsizetype kFrameBytes = 2 * static_cast<qsizetype>(sizeof(float));
    constexpr int kTrimFadeMs = 2;
    const qsizetype frames = alignedStereoFloatBytes(buffer.size()) / kFrameBytes;
    if (frames <= 0 || sampleRate <= 0) {
        return;
    }

    const qsizetype fadeFrames =
        std::min<qsizetype>(
            frames,
            std::max<qsizetype>(1, sampleRate * kTrimFadeMs / 1000));
    auto* samples = reinterpret_cast<float*>(buffer.data());
    for (qsizetype frame = 0; frame < fadeFrames; ++frame) {
        const float gain =
            static_cast<float>(frame + 1) / static_cast<float>(fadeFrames);
        samples[frame * 2] *= gain;
        samples[frame * 2 + 1] *= gain;
    }
}

void dropAudioBufferFront(QByteArray& buffer, qsizetype bytes, int sampleRate)
{