tracktion_ImpulseResponsePlugin.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 ImpulseResponsePlugin  : public Plugin
{
public:
    ImpulseResponsePlugin (PluginCreationInfo);
 
    ~ImpulseResponsePlugin() override;
 
    static const char* getPluginName();
    static inline const char* xmlTypeName = "impulseResponse";
 
    //==============================================================================
    bool loadImpulseResponse (const void* sourceData, size_t sourceDataSize);
 
    bool loadImpulseResponse (const juce::File& fileImpulseResponse);
 
    bool loadImpulseResponse (juce::AudioBuffer<float>&& bufferImpulseResponse,
                              double sampleRateToStore,
                              int bitDepthToStore);
 
    //==============================================================================
    juce::CachedValue<juce::String> name;           
    juce::CachedValue<bool> normalise;              
    juce::CachedValue<bool> trimSilence;            
    AutomatableParameter::Ptr highPassCutoffParam;  
    AutomatableParameter::Ptr lowPassCutoffParam;   
    AutomatableParameter::Ptr gainParam;            
    AutomatableParameter::Ptr mixParam;             
    AutomatableParameter::Ptr filterQParam;         
    //==============================================================================
    juce::String getName() const override;
    juce::String getShortName (int /*suggestedLength*/) override;
    juce::String getPluginType() override;
    bool needsConstantBufferSize() override;
    juce::String getSelectableDescription() override;
 
    double getLatencySeconds() override;
    void initialise (const PluginInitialisationInfo&) override;
    void deinitialise() override;
    void reset() override;
    void applyToBuffer (const PluginRenderContext&) override;
    void restorePluginStateFromValueTree (const juce::ValueTree&) override;
 
private:
    //==============================================================================
    enum
    {
        convolutionIndex,
        HPFIndex,
        LPFIndex,
        gainIndex,
    };
 
    juce::CachedValue<float> gainValue, mixValue;
    juce::CachedValue<float> highPassCutoffValue, lowPassCutoffValue;
    juce::CachedValue<float> qValue;
 
    juce::dsp::ProcessorChain<juce::dsp::Convolution,
                              juce::dsp::ProcessorDuplicator<juce::dsp::IIR::Filter<float>, juce::dsp::IIR::Coefficients<float>>,
                              juce::dsp::ProcessorDuplicator<juce::dsp::IIR::Filter<float>, juce::dsp::IIR::Coefficients<float>>,
                              juce::dsp::Gain<float>> processorChain;
    juce::SmoothedValue<float> highFreqSmoother, lowFreqSmoother, gainSmoother, wetGainSmoother, dryGainSmoother, qSmoother;
 
    struct WetDryGain { float wet, dry; };
    static WetDryGain getWetDryLevels (float mix)
    {
        const float dry = 1.0f - (mix * mix);
        float temp = 1.0f - mix;
        const float wet = 1.0f - (temp * temp);
 
        return { wet, dry };
    }
    void loadImpulseResponseFromState();
 
    void valueTreePropertyChanged (juce::ValueTree&, const juce::Identifier&) override;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ImpulseResponsePlugin)
};
 
}} // namespace tracktion { inline namespace engine