Method pull

src/core/AudioNodeOutput.cpp:97–124

}

AudioBus * AudioNodeOutput::pull(ContextRenderLock & r, AudioBus * inPlaceBus, int bufferSize)
{
    ASSERT(r.context());
    ASSERT(m_renderingFanOutCount > 0 || m_renderingParamFanOutCount > 0);

    m_internalBus->setSampleRate(r.context()->sampleRate());
    bus(r)->setSampleRate(r.context()->sampleRate());

    // Causes our AudioNode to process if it hasn't already for this render quantum.
    // We try to do in-place processing (using inPlaceBus) if at all possible,
    // but we can't process in-place if we're connected to more than one input (fan-out > 1).
    // In this case pull() is called multiple times per rendering quantum, and the processIfNecessary() call below will
    // cause our node to process() only the first time, caching the output in m_internalOutputBus for subsequent calls.

    updateRenderingState(r);

    bool useInPlaceBus = inPlaceBus && inPlaceBus->numberOfChannels() == numberOfChannels() && (m_renderingFanOutCount + m_renderingParamFanOutCount) == 1;

    // Setup the actual destination bus for processing when our node's process() method gets called in processIfNecessary() below.
    m_inPlaceBus = useInPlaceBus ? inPlaceBus : 0;

    auto n = sourceNode();
    if (!n)
        return bus(r);

    n->processIfNecessary(r, bufferSize);
    return bus(r);
}

AudioBus * AudioNodeOutput::bus(ContextRenderLock & r) const
{