老代码备份:用Processing处理一首歌曲并播放,然后根据歌曲的节奏通过Arduino驱动LED灯闪烁

ArduinoProcessing.java

import processing.serial.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
import cc.arduino.*;

class BeatListener implements AudioListener
{
  private BeatDetect beat;
  private AudioPlayer source;
  
  BeatListener(BeatDetect beat, AudioPlayer source)
  {
    this.source = source;
    this.source.addListener(this);
    this.beat = beat;
  }
  
  void samples(float[] samps)
  {
    beat.detect(source.mix);
  }
  
  void samples(float[] sampsL, float[] sampsR)
  {
    beat.detect(source.mix);
  }
}

Minim minim;
AudioPlayer song;
BeatDetect beat;
BeatListener bl;
Arduino arduino;

int ledPin =  10;
int ledPin2 =  6;
int ledPin3 =  2;
float kickSize, snareSize, hatSize;

void setup() {
  size(512, 200, P3D);
  
  minim = new Minim(this);
  arduino = new Arduino(this, Arduino.list()[1], 57600);
  
  song = minim.loadFile("music.mp3", 2048);
  song.play();
  
  beat = new BeatDetect(song.bufferSize(), song.sampleRate());
  beat.setSensitivity(100);
  kickSize = snareSize = hatSize = 16;
  
  arduino.pinMode(ledPin, Arduino.OUTPUT);
  arduino.pinMode(ledPin2, Arduino.OUTPUT);  
  arduino.pinMode(ledPin3, Arduino.OUTPUT); 
  
  bl = new BeatListener(beat, song);  
  textFont(createFont("Helvetica", 16));
  textAlign(CENTER);
}

void draw() {
  background(0);
  fill(255);
  if(beat.isKick()) {
      arduino.digitalWrite(ledPin, Arduino.HIGH);   // set the LED on
      kickSize = 32;
  }
  if(beat.isSnare()) {
      arduino.digitalWrite(ledPin2, Arduino.HIGH);   // set the LED on
      snareSize = 32;
  }
  if(beat.isHat()) {
      arduino.digitalWrite(ledPin3, Arduino.HIGH);   // set the LED on
      hatSize = 32;
  }
  arduino.digitalWrite(ledPin, Arduino.LOW);
  arduino.digitalWrite(ledPin2, Arduino.LOW);
  arduino.digitalWrite(ledPin3, Arduino.LOW);
  textSize(kickSize);
  text("KICK", width/4, height/2);
  textSize(snareSize);
  text("SNARE", width/2, height/2);
  textSize(hatSize);
  text("HAT", 3*width/4, height/2);
  kickSize = constrain(kickSize * 0.95, 16, 32);
  snareSize = constrain(snareSize * 0.95, 16, 32);
  hatSize = constrain(hatSize * 0.95, 16, 32);
}

void stop() {
  // always close Minim audio classes when you are finished with them
  song.close();
  // always stop Minim before exiting
  minim.stop();
  // this closes the sketch
  super.stop();
}