[feisty2]

@Myrsloik
should I release *frameData instantly if an exception is thrown from the arAllFramesReady branch? or should I just leave it unhandled and expect it gets deleted when getFrame() is invoked again with arError?

basically, this

try {
    if (auto& ResourceHandle = reinterpret_cast<ResourceType*&>(*frameData); activationReason == arInitial)
        ResourceHandle = new auto{ FilterInstance->AcquireResources(...) };
    else if (activationReason == arAllFramesReady) {
        auto ManagedResourceHandle = std::unique_ptr<ResourceType>{ ResourceHandle };
        auto GeneratedFrame = FilterInstance->DrawFrame(*ManagedResourceHandle, ...);
        // if DrawFrame() throws an exception, *ResourceHandle is instantly released
        // by the destructor of std::unique_ptr

        return GeneratedFrame.ReleaseOwnership();
    }
    else if (activationReason == arError)
        delete ResourceHandle;
        // possible double-free here?

    return nullptr;
}
catch (RuntimeError& ErrorMessage) {
    FrameContext.RaiseError(ErrorMessage);
    return nullptr;
}

or this

try {
    if (auto& ResourceHandle = reinterpret_cast<ResourceType*&>(*frameData); activationReason == arInitial)
        ResourceHandle = new auto{ FilterInstance->AcquireResources(...) };
    else if (activationReason == arAllFramesReady) {
        auto GeneratedFrame = FilterInstance->DrawFrame(*ResourceHandle, ...);
        // no leak if DrawFrame() throws an exception
        // *ResourceHandle will be released later from the arError branch

        delete ResourceHandle;
        return GeneratedFrame.ReleaseOwnership();
    }
    else if (activationReason == arError)
        delete ResourceHandle;
    return nullptr;
}
catch (RuntimeError& ErrorMessage) {
    FrameContext.RaiseError(ErrorMessage);
    return nullptr;
}

?