tracktion_SimpleNodePlayer.h

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 /*
    ,--.                     ,--.     ,--.  ,--.
  ,-'  '-.,--.--.,--,--.,---.|  |,-.,-'  '-.`--' ,---. ,--,--,      Copyright 2024
  '-.  .-'|  .--' ,-.  | .--'|     /'-.  .-',--.| .-. ||      \   Tracktion Software
    |  |  |  |  \ '-'  \ `--.|  \  \  |  |  |  |' '-' '|  ||  |       Corporation
    `---' `--'   `--`--'`---'`--'`--' `---' `--' `---' `--''--'    www.tracktion.com
 
    Tracktion Engine uses a GPL/commercial licence - see LICENCE.md for details.
*/
 
#pragma once
 
 
namespace tracktion { inline namespace graph
{
 
//==============================================================================
//==============================================================================
class SimpleNodePlayer
{
public:
    SimpleNodePlayer (std::unique_ptr<Node> nodeToPlay,
                      double sampleRateToUse, int blockSizeToUse)
    {
        assert (nodeToPlay);
        graph = node_player_utils::prepareToPlay (std::move (nodeToPlay), nullptr, sampleRateToUse, blockSizeToUse);
    }
 
    void process (const Node::ProcessContext& pc)
    {
        // Prepare all nodes for the next block
        for (auto node : graph->orderedNodes)
            node->prepareForNextBlock (pc.referenceSampleRange);
 
        // Then process them all in sequence
        for (auto node : graph->orderedNodes)
            node->process (pc.numSamples, pc.referenceSampleRange);
 
        // Finally copy the output from the root Node to our player buffers
        auto output = graph->rootNode->getProcessedOutput();
        auto numAudioChannels = std::min (output.audio.getNumChannels(),
                                          pc.buffers.audio.getNumChannels());
 
        if (numAudioChannels > 0)
            add (pc.buffers.audio.getFirstChannels (numAudioChannels),
                 output.audio.getFirstChannels (numAudioChannels));
 
        pc.buffers.midi.mergeFrom (output.midi);
    }
 
private:
    std::unique_ptr<NodeGraph> graph;
};
 
}}