tracktion_TrackMutingNode.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.
*/
 
namespace tracktion { inline namespace engine
{
 
class TrackMuteState
{
public:
    TrackMuteState (Track&, bool muteForInputsWhenRecording, bool processMidiWhenMuted);
 
    TrackMuteState (Edit&);
 
    void update();
 
    //==============================================================================
    bool shouldTrackBeAudible() const;
 
    bool shouldTrackContentsBeProcessed() const;
 
    bool shouldTrackMidiBeProcessed() const;
 
    //==============================================================================
    bool wasJustMuted() const       { return wasJustMutedFlag.load (std::memory_order_acquire); }
 
    bool wasJustUnMuted() const     { return wasJustUnMutedFlag.load (std::memory_order_acquire); }
 
    //==============================================================================
    size_t getItemID() const;
 
private:
    //==============================================================================
    Edit& edit;
    juce::ReferenceCountedObjectPtr<Track> track;
    bool wasBeingPlayedFlag = false;
    std::atomic<bool> wasJustMutedFlag { false }, wasJustUnMutedFlag { false };
 
    bool callInputWhileMuted = false;
    bool processMidiWhileMuted = false;
    juce::Array<InputDeviceInstance*> inputDevicesToMuteFor;
 
    //==============================================================================
    bool isBeingPlayed() const;
};
 
 
//==============================================================================
//==============================================================================
class TrackMutingNode final : public tracktion::graph::Node
{
public:
    TrackMutingNode (std::unique_ptr<TrackMuteState>, std::unique_ptr<tracktion::graph::Node> input,
                     bool dontMuteIfTrackContentsShouldBeProcessed);
 
    //==============================================================================
    tracktion::graph::NodeProperties getNodeProperties() override;
    std::vector<Node*> getDirectInputNodes() override;
    void prepareToPlay (const tracktion::graph::PlaybackInitialisationInfo&) override;
    bool isReadyToProcess() override;
    void prefetchBlock (juce::Range<int64_t>) override;
    void preProcess (choc::buffer::FrameCount, juce::Range<int64_t>) override;
    void process (ProcessContext&) override;
 
private:
    //==============================================================================
    std::unique_ptr<TrackMuteState> trackMuteState;
    std::unique_ptr<tracktion::graph::Node> input;
    bool dontMuteIfTrackContentsShouldBeProcessed = false;
    bool canUseSourceBuffers = false;
 
    //==============================================================================
    void rampBlock (choc::buffer::ChannelArrayView<float>, float start, float end);
    void sendAllNotesOffIfDesired (MidiMessageArray&);
};
 
}} // namespace tracktion { inline namespace engine