如何使用JTransforms分析和显示来自ExoPlayer的音频样本的频谱？

// 导入JTransforms库
import org.jtransforms.fft.DoubleFFT_1D;

// 获取音频样本数据
byte[] audioSamples = exoPlayer.getAudioSamples();

// 执行快速傅里叶变换
int fftSize = audioSamples.length;
DoubleFFT_1D fft = new DoubleFFT_1D(fftSize);
double[] audioData = new double[fftSize];
for (int i = 0; i < fftSize; i++) {
    audioData[i] = (double) audioSamples[i];
}
fft.realForward(audioData);

// 显示频谱
// 这里使用JavaFX的示例，需要在JavaFX应用程序中运行
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.stage.Stage;

public class SpectrumAnalyzer extends Application {
    @Override
    public void start(Stage stage) {
        // 创建频谱图表
        NumberAxis xAxis = new NumberAxis();
        NumberAxis yAxis = new NumberAxis();
        LineChart<Number, Number> chart = new LineChart<>(xAxis, yAxis);
        chart.setTitle("Audio Spectrum");
        chart.setCreateSymbols(false);

        // 添加频谱数据
        XYChart.Series<Number, Number> series = new XYChart.Series<>();
        for (int i = 0; i < fftSize / 2; i++) {
            series.getData().add(new XYChart.Data<>(i, audioData[i]));
        }
        chart.getData().add(series);

        // 创建场景并显示图表
        Scene scene = new Scene(chart, 800, 600);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}