KwidgetGUI_OfflineAnalyser.h

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namespace krotos
{
    class KwidgetGUI_OfflineAnalyser : public KwidgetGUI
    {
      public:
        using Parameters = Kwidget_OfflineAnalyser::Parameters;
 
        KwidgetGUI_OfflineAnalyser(Kwidget& owner);
 
        void paint(Graphics& g) override;
        void resized() override;
 
      private:
        void openButtonClicked();
        void clearButtonClicked();
        void stftButtonClicked();
        void erbButtonClicked();
 
        void averageToMono(AudioSampleBuffer& buffer)
        {
            if (buffer.getNumChannels() == 2) // Check if the buffer is stereo
            {
                const int numSamples = buffer.getNumSamples();
 
                // Create a temporary buffer for the mono signal
                AudioSampleBuffer monoBuffer(1, numSamples);
 
                // Average the stereo channels to mono
                monoBuffer.addFrom(0, 0, buffer, 0, 0, numSamples);
                monoBuffer.addFrom(0, 0, buffer, 1, 0, numSamples);
                monoBuffer.applyGain(0.5f); // Scale the mono signal
 
                // Replace the stereo buffer with the mono buffer
                buffer.setSize(1, numSamples);
                buffer.copyFrom(0, 0, monoBuffer, 0, 0, numSamples);
            }
        }
 
        std::vector<float> extractData(const AudioSampleBuffer& buffer)
        {
            const int numChannels = buffer.getNumChannels();
            const int numSamples = buffer.getNumSamples();
 
            std::vector<float> data(numSamples);
 
            if (numChannels > 0)
            {
                const float* channelData = buffer.getReadPointer(0);
 
                for (int i = 0; i < numSamples; ++i)
                {
                    data[i] = channelData[i];
                }
            }
 
            return data;
        }
 
        ShortTimeFourierTransform m_stft;
        ERB_FFTSpectrogram m_erbSTFT;
        float m_sampleRate;
 
        Image m_spectrogramImage;
        Rectangle<int> m_imageBounds;
 
        TextButton m_openButton;
        TextButton m_clearButton;
        TextButton m_stftButton;
        TextButton m_erbButton;
 
        std::unique_ptr<juce::FileChooser> m_chooser;
        std::unique_ptr<AudioFormatReader> m_wavReader;
        AudioSampleBuffer m_fileBuffer;
 
        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(KwidgetGUI_OfflineAnalyser)
    };
 
} // namespace krotos