tracktion_SharedLevelMeasuringNode.cpp

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 /*
    ,--.                     ,--.     ,--.  ,--.
  ,-'  '-.,--.--.,--,--.,---.|  |,-.,-'  '-.`--' ,---. ,--,--,      Copyright 2024
  '-.  .-'|  .--' ,-.  | .--'|     /'-.  .-',--.| .-. ||      \   Tracktion Software
    |  |  |  |  \ '-'  \ `--.|  \  \  |  |  |  |' '-' '|  ||  |       Corporation
    `---' `--'   `--`--'`---'`--'`--' `---' `--' `---' `--''--'    www.tracktion.com
 
    Tracktion Engine uses a GPL/commercial licence - see LICENCE.md for details.
*/
 
 
namespace tracktion { inline namespace engine
{
 
SharedLevelMeasuringNode::SharedLevelMeasuringNode (SharedLevelMeasurer::Ptr source, std::unique_ptr<Node> inputNode)
    : levelMeasurer (std::move (source)), input (std::move (inputNode))
{
    jassert (levelMeasurer != nullptr);
 
    setOptimisations ({ tracktion::graph::ClearBuffers::no,
                        tracktion::graph::AllocateAudioBuffer::no });
}
 
std::vector<tracktion::graph::Node*> SharedLevelMeasuringNode::getDirectInputNodes()
{
    return { input.get() };
}
 
tracktion::graph::NodeProperties SharedLevelMeasuringNode::getNodeProperties()
{
    return input->getNodeProperties();
}
 
void SharedLevelMeasuringNode::prepareToPlay (const tracktion::graph::PlaybackInitialisationInfo& info)
{
    sampleRate = info.sampleRate;
    levelMeasurer->setSize (2, info.blockSize);
}
 
bool SharedLevelMeasuringNode::isReadyToProcess()
{
    return input->hasProcessed();
}
 
void SharedLevelMeasuringNode::prefetchBlock (juce::Range<int64_t> referenceSampleRange)
{
    levelMeasurer->startNextBlock (tracktion::graph::sampleToTime (referenceSampleRange.getStart(), sampleRate));
}
 
void SharedLevelMeasuringNode::process (ProcessContext& pc)
{
    SCOPED_REALTIME_CHECK
 
    // Pass on input to output
    auto sourceBuffers = input->getProcessedOutput();
 
    setAudioOutput (input.get(), sourceBuffers.audio);
    pc.buffers.midi.copyFrom (sourceBuffers.midi);
 
    // And pass audio to level measurer
    auto buffer = tracktion::graph::toAudioBuffer (sourceBuffers.audio);
    levelMeasurer->addBuffer (buffer, 0, buffer.getNumSamples());
}
 
}} // namespace tracktion { inline namespace engine