Method valueForContextTime

src/core/AudioParamTimeline.cpp:136–160

}

float AudioParamTimeline::valueForContextTime(
    ContextRenderLock & r,
    float defaultValue, bool & hasValue)
{
    auto context = r.context();
    if (!context)
        return defaultValue;

    std::unique_lock<std::mutex> lock(m_eventsMutex, std::try_to_lock);
    if (!lock.owns_lock() || !m_events.size() || context->currentTime() < m_events[0].time())
    {
        hasValue = false;
        return defaultValue;
    }

    // Ask for just a single value.
    double sampleRate = context->sampleRate();
    double startTime = context->currentTime();
    double endTime = startTime + 1.1 / sampleRate;  // time just beyond one sample-frame
    double controlRate = sampleRate / AudioNode::ProcessingSizeInFrames;  // one parameter change per render quantum
    float value = valuesForTimeRange(startTime, endTime, defaultValue, &value, 1, sampleRate, controlRate);

    hasValue = true;
    return value;
}

float AudioParamTimeline::valuesForTimeRange(
    double startTime,