将导入按钮添加到音乐播放器

Question

我正在尝试使功能导入按钮成为可能，我的意思是我单击该按钮，文件浏览器弹出，我可以单击一首歌曲，然后播放器可以播放它。就像任何其他音乐播放器一样。这是迄今为止我的代码的基本视图，不包括类：

import ddf.minim.spi.*;
import ddf.minim.*; 
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
import ddf.minim.ugens.*;
boolean play;
boolean repeat;
int k;
String filename;//
Minim minim;
AudioPlayer player;

Pics p;
Mechs m;
Importbt b;
ArrayList<Songs> s;
int i=0;
void setup() {
size(600, 400);
b=new Importbt();
m=new Mechs();
p=new Pics();
p.Thepics();

minim=new Minim(this);
s = new ArrayList();
s.add(new Songs(player, "SONG 1", "SONG 1"));
s.add(new Songs(player, "SONG 2", "SONG 2"));
s.add(new Songs(player, "SONG 3", "SONG 3"));
s.add(new Songs(player, "SONG 4", "SONG 4"));
k = s.size()-1;
}
void draw() {
background(0);
p.getFunction();
}

void fileSelected(File selection) {
if (selection == null) {
} 
else {
filename = selection.getAbsolutePath();
player = minim.loadFile(filename);//loads the file
// s.add(k, new Songs(player, filename, "a song"));
//s.get(k).playmusic();
s.add(new Songs(player, filename, "ftyu"));
s.get(k).waveform();//function from my songs class
player.play();//plays the file

至于我的班级，如果需要的话

class Songs {
AudioPlayer song; 
String directory;
String songName;
Songs(AudioPlayer song, String directory, String songName) {

song=minim.loadFile(directory);

this.song=song;
this.songName=songName;
}
void waveform() {
for (int j = 1; j < song.bufferSize() - 1; j++)
{
  if (j>0) {

    line(j, 214  + song.left.get(j)*50, j+1, 214 + song.left.get(j+1)*50);
    //waves from the left.
    stroke( 255, 0, 0 );  //this is the colour of the first line (red)
    line(j, 214 + song.right.get(j)*50, j+1, 214 + song.right.get(j+1)*50);
    //waves from the right.
    stroke(255, 255, 0);

  }
}

Answer 1

这里有一些东西可以帮助你：

import ddf.minim.spi.*;
import ddf.minim.signals.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
import ddf.minim.ugens.*;
import ddf.minim.effects.*;

float buttonX;
float buttonY;
float buttonW;
float buttonH;

Minim minim;
AudioPlayer player;

String filename;

void setup() {

  textSize(24);

  frame.setResizable(false);

  background(255);

  size(600, 200);

  fill(0);
  stroke(0);
  noFill();

  buttonW = 200;
  buttonH = 50;
  buttonX = width - width/2 - buttonW/2;
  buttonY = height/2 - buttonH/2;

  // Minim stuff
  minim = new Minim(this);
}

void draw() {

  background(255);
  fill(0);

  rectMode(CORNER);

  rect(buttonX, buttonY, buttonW, buttonH);

  fill(255);

  textAlign(LEFT);
  text("Import File", buttonX+35, buttonY+30);
}

void mouseClicked() {
  if (mouseX>buttonX && mouseX < buttonX+buttonW && mouseY > buttonY && mouseY < buttonY+buttonH) {
    selectInput("Import music file", "fileSelected");
  }
}

/* Taken from Processing.org */
void fileSelected(File selection) {
  if (selection == null) {
    println("Window was closed or user hit cancel");
  } else {
    filename = selection.getAbsolutePath();
    player = minim.loadFile(filename);
    player.play();
    println("User selected " + filename);
  }
}

// stop minim and the player.
void stop() {
  player.close();
  minim.stop();
  super.stop();
}

这是一个非常简单的例子。所有这一切都是为Minim 和AudioPlayer 创建对象，然后使用文件选择机制将文件的路径和名称提供给loadFile(filename)。然后，如果该文件是合法的音频文件（我只用.wav 文件进行了测试），那么它就会播放它。完成后，播放器停止。

请记住，这不会进行任何错误检查或任何操作，因此如果您选择了 .jpeg 文件，例如，它将引发异常。您应该使用这些东西来尝试看看如何精简您的播放器。

您应该尝试理解的一件事是，这一切都非常简单。文件名只是一个String，没有什么特别复杂的。

您可以在此处找到Minim 的教程：http://artandtech.aalto.fi/wp-content/uploads/2012/06/minim.pdf

更新：正弦波与所选歌曲配合使用

我已经更新了我在此处提供的代码，以处理您正在进行的波操作。我在选择文件时添加了一个boolean true。现在您将不得不调整此代码以处理多个文件。这只是一个例子。

更新 2：实现了与您的歌曲类一起使用的代码

import ddf.minim.spi.*;
import ddf.minim.signals.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
import ddf.minim.ugens.*;
import ddf.minim.effects.*;

float buttonX;
float buttonY;
float buttonW;
float buttonH;

Minim minim;
AudioPlayer player;
ArrayList<Songs> s;
int k;

String filename;

boolean isSelected = false;

void setup() {

  s = new ArrayList();

  textSize(24);

  frame.setResizable(false);

  background(255);

  size(600, 600);

  fill(0);
  stroke(0);
  noFill();

  buttonW = 200;
  buttonH = 50;
  buttonX = width - width/2 - buttonW/2;
  buttonY = height/2 - buttonH/2;

  // Minim stuff
  minim = new Minim(this);
}

void draw() {

  background(255);
  fill(0);

  rectMode(CORNER);

  rect(buttonX, buttonY, buttonW, buttonH);

  fill(255);

  textAlign(LEFT);
  text("Import File", buttonX+35, buttonY+30);

  if (isSelected) {
    s.get(k).waveform();
  }
}

void mouseClicked() {
  if (mouseX>buttonX && mouseX < buttonX+buttonW && mouseY > buttonY && mouseY < buttonY+buttonH) {
    selectInput("Import music file", "fileSelected");
  }
}

/* Taken from Processing.org */
void fileSelected(File selection) {
  if (selection == null) {
    println("Window was closed or user hit cancel");
  } 
  else {
    filename = selection.getAbsolutePath();
    s.add(new Songs(player, filename, "Filename"));
    isSelected = true;
  }
}

// stop minim and the player.
void stop() {
  player.close();
  minim.stop();
  super.stop();
}

class Songs {
  AudioPlayer song; 
  String directory;
  String songName;
  Songs(AudioPlayer song, String directory, String songName) {

    song=minim.loadFile(directory);    

    this.song=song;
    this.songName=songName;
    song.play();
  }
  void waveform() {
    for (int j = 1; j < song.bufferSize() - 1; j++)
    {
      if (j>0) {

        line(j, 214  + song.left.get(j)*50, j+1, 214 + song.left.get(j+1)*50);
        //waves from the left.
        stroke( 255, 0, 0 );  //this is the colour of the first line (red)
        line(j, 214 + song.right.get(j)*50, j+1, 214 + song.right.get(j+1)*50);
        //waves from the right.
        stroke(255, 255, 0);
      }
    }
  }
}

您看到一闪而过的红光，然后什么都没有，因为它会读取 waveform() 方法并非常快地通过 for 循环，然后继续执行其余部分播放歌曲等操作。像我做的那样把它放在draw() 可以帮助你避免这种情况。