Method adjustFadeLength

src/effects/effectstack/model/effectstackmodel.cpp:1010–1140

}

bool EffectStackModel::adjustFadeLength(int duration, bool fromStart, bool audioFade, bool videoFade, bool logUndo)
{
    QWriteLocker locker(&m_lock);
    if (fromStart) {
        // Fade in
        if (m_fadeIns.empty()) {
            if (audioFade) {
                appendEffect(QStringLiteral("fadein"));
            }
            if (videoFade) {
                appendEffect(QStringLiteral("fade_from_black"));
            }
        }
        QList<QModelIndex> indexes;
        auto ptr = m_masterService.lock();
        int in = 0;
        if (ptr) {
            in = ptr->get_int("in");
        }
        int oldDuration = -1;
        for (int i = 0; i < rootItem->childCount(); ++i) {
            if (m_fadeIns.count(std::static_pointer_cast<TreeItem>(rootItem->child(i))->getId()) > 0) {
                std::shared_ptr<EffectItemModel> effect = std::static_pointer_cast<EffectItemModel>(rootItem->child(i));
                if (oldDuration == -1) {
                    oldDuration = effect->filter().get_length();
                }
                effect->filter().set("in", in);
                duration = qMin(pCore->getItemDuration(m_ownerId), duration);
                effect->filter().set("out", in + duration);
                indexes << getIndexFromItem(effect);
                if (effect->filter().get("alpha") == QLatin1String("1")) {
                    // Adjust level value to match filter end
                    const QString current = effect->filter().get("level");
                    const QChar mod = AssetParameterModel::getKeyframeType(current);
                    if (!mod.isNull()) {
                        const QString val = QStringLiteral("0%1=0;-1%1=1").arg(mod);
                        effect->filter().set("level", val.toUtf8().constData());
                    } else {
                        effect->filter().set("level", "0=0;-1=1");
                    }
                } else if (effect->filter().get("level") == QLatin1String("1")) {
                    // Adjust level value to match filter end
                    const QString current = effect->filter().get("alpha");
                    const QChar mod = AssetParameterModel::getKeyframeType(current);
                    if (!mod.isNull()) {
                        const QString val = QStringLiteral("0%1=0;-1%1=1").arg(mod);
                        effect->filter().set("alpha", val.toUtf8().constData());
                    } else {
                        effect->filter().set("alpha", "0=0;-1=1");
                    }
                }
            }
        }
        if (!indexes.isEmpty()) {
            Q_EMIT dataChanged(indexes.first(), indexes.last(), QVector<int>());
            pCore->updateItemModel(m_ownerId, QStringLiteral("fadein"), QStringLiteral("out"));
            if (videoFade) {
                int min = pCore->getItemPosition(m_ownerId);