tracktion_ClickNode.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
{
 
//==============================================================================
namespace Click
{
    int getMidiClickNote (Engine&, bool big);
    juce::String getClickWaveFile (Engine&, bool big);
    void setMidiClickNote (Engine&, bool big, int noteNum);
    void setClickWaveFile (Engine&, bool big, const juce::String& filename);
}
 
//==============================================================================
class ClickGenerator
{
public:
    //==============================================================================
    ClickGenerator (Edit&, bool isMidi);
 
    void prepareToPlay (double sampleRate, TimePosition startTime);
 
    void processBlock (choc::buffer::ChannelArrayView<float>*, MidiMessageArray*, TimeRange);
 
private:
    const Edit& edit;
    const EditPlaybackContext& context { *edit.getTransport().getCurrentPlaybackContext() };
    bool midi = false;
    const tempo::Sequence& sequence { edit.tempoSequence.getInternalSequence() };
    tempo::Sequence::Position tempoPosition { sequence };
 
    double sampleRate = 44100.0;
    juce::AudioBuffer<float> bigClick, littleClick;
    int bigClickMidiNote = 37, littleClickMidiNote = 76;
 
    //==============================================================================
    bool isPlaying();
    void trigger (juce::AudioBuffer<float>*);
    void render (choc::buffer::ChannelArrayView<float>&);
    void reset();
    int samplesRemaining();
 
    juce::AudioBuffer<float>* currentSample = nullptr;
    int samplePos = -1;
 
    //==============================================================================
    bool isMutedAtTime (TimePosition) const;
};
 
 
//==============================================================================
class ClickNode final   : public tracktion::graph::Node
{
public:
    ClickNode (Edit&, int numAudioChannels, bool generateMidi, tracktion::graph::PlayHead&);
 
    std::vector<Node*> getDirectInputNodes() override;
    tracktion::graph::NodeProperties getNodeProperties() override;
    void prepareToPlay (const tracktion::graph::PlaybackInitialisationInfo&) override;
    bool isReadyToProcess() override;
    void process (ProcessContext&) override;
 
private:
    //==============================================================================
    Edit& edit;
    tracktion::graph::PlayHead& playHead;
    ClickGenerator clickGenerator;
    const int numChannels;
    const bool generateMidi;
    double sampleRate = 44100.0;
};
 
}} // namespace tracktion { inline namespace engine