Sound minim

lviensen

Como posso usar o aúdio e o "desenho de frequência" fora do draw() ?

import ddf.minim.*;

Minim minim;
AudioPlayer groove;

void setup()
{
  size(512, 200, P3D);
  minim = new Minim(this);
  groove = minim.loadFile("groove.mp3", 2048);
  groove.loop();
}

void draw()
{
  background(0);
  stroke(255);
  for(int i = 0; i < groove.bufferSize() - 1; i++)
  {
    line(i, 50  + groove.left.get(i)*50,  i+1, 50  + groove.left.get(i+1)*50);
    line(i, 150 + groove.right.get(i)*50, i+1, 150 + groove.right.get(i+1)*50);
  }
}

Chrisir

see

http://code.compartmental.net/minim/fft_class_fft.html

/**
 * This sketch demonstrates how to use an FFT to analyze
 * the audio being generated by an AudioPlayer.
 * <p>
 * FFT stands for Fast Fourier Transform, which is a 
 * method of analyzing audio that allows you to visualize 
 * the frequency content of a signal. You've seen 
 * visualizations like this before in music players 
 * and car stereos.
 * <p>
 * For more information about Minim and additional features, 
 * visit http://code.compartmental.net/minim/
 */

import ddf.minim.analysis.*;
import ddf.minim.*;

Minim       minim;
AudioPlayer jingle;
FFT         fft;

void setup()
{
  size(512, 200, P3D);

  minim = new Minim(this);

  // specify that we want the audio buffers of the AudioPlayer
  // to be 1024 samples long because our FFT needs to have 
  // a power-of-two buffer size and this is a good size.
  jingle = minim.loadFile("jingle.mp3", 1024);

  // loop the file indefinitely
  jingle.loop();

  // create an FFT object that has a time-domain buffer 
  // the same size as jingle's sample buffer
  // note that this needs to be a power of two 
  // and that it means the size of the spectrum will be half as large.
  fft = new FFT( jingle.bufferSize(), jingle.sampleRate() );
}

void draw()
{
  background(0);
  stroke(255);

  // perform a forward FFT on the samples in jingle's mix buffer,
  // which contains the mix of both the left and right channels of the file
  fft.forward( jingle.mix );

  for (int i = 0; i < fft.specSize (); i++)
  {
    // draw the line for frequency band i, scaling it up a bit so we can see it
    line( i, height, i, height - fft.getBand(i)*8 );
  }
}

lviensen

Não é isto. Quero que esta parte do código fique fora da função draw() "

 for (int i = 0; i < fft.specSize (); i++)

{

    // draw the line for frequency band i, scaling it up a bit so we can see it

    line( i, height, i, height - fft.getBand(i)*8 );

}

"

GoToLoop

Pq vc quer o loop fora de draw()? Tá tendo problemas com performance?
Why do you want the loop outside draw()? Having any performance issues?

Pra isso teremos q usar um thread() separado c/ loop infinito só pra lidar c/ isso:
For that we're gonna need to use some separate thread() w/ infinite loop just to deal w/ that:

https://Processing.org/reference/thread_.html

Infelizmente ñ devemos modificar o canvas do sketch fora do Thread "Animation".
Unfortunately we shouldn't modify sketch's canvas outside "Animation" Thread.

Ao invés disto, criamos um PGraphics separado e usamos line() ali.
Instead, we create some separate PGraphics and use line() there.

Então o único encargo de draw() é mostrar o resultado final do PGraphics.
Then draw()'s solely task is to display PGraphics's final result.

Podemos escolher image(), set() ou mesmo background() pra por o PGraphics no canvas.
We can choose image(), set() or even background() in order to put PGraphics in the canvas.

lviensen

GoToLoop, pq eu preciso executar outras tarefas antes desse trecho de código.

Pode me mandar algum código de exemplo para fazer isso fora do draw()?

GoToLoop

// forum.processing.org/two/discussion/12137/sound-minim
// GoToLoop (2015-Aug-19)

static final int FPS = 1, DELAY = 3 * 1000/FPS;
PGraphics pg;

void setup() {
  size(400, 300, JAVA2D);
  frameRate(FPS);
  imageMode(CORNER);

  pg = createGraphics(width, height, JAVA2D);
  pg.beginDraw();
  pg.smooth(4);
  pg.ellipseMode(CENTER);
  pg.rectMode(CENTER);
  pg.endDraw();

  thread("drawPG");
}

void draw() {
  background((color) random(#000000));
  image(pg, 0, 0);
  frame.setTitle(str(frameCount));
}

void drawPG() {
  final PGraphics pgl = pg;
  final int x = pgl.width>>1, y = pgl.height>>1, w = x, h = y;

  boolean isRect = true;

  for (;; delay(DELAY)) {
    pgl.clear();
    pgl.fill((color) random(#000000));

    if (isRect ^= true)  pgl.rect(x, y, w, h);
    else                 pgl.ellipse(x, y, w, h);

    pgl.endDraw();
  }
}

lviensen

O que faz a função bufferSize() ? Posso usá-la fora do draw() ?

 import ddf.minim.*;

 Minim minim;
 AudioPlayer groove;

 void setup()
 {
    size(512, 200, P3D);

    minim = new Minim(this);
    groove = minim.loadFile("groove.mp3", 2048);
    groove.loop();
}

void draw()
{
    background(0);

    stroke(255);

    for(int i = 0; i < groove.bufferSize() - 1; i++)
    {
         line(i, 50  + groove.left.get(i)*50,  i+1, 50  + groove.left.get(i+1)*50);
         line(i, 150 + groove.right.get(i)*50, i+1, 150 + groove.right.get(i+1)*50);
    }
}

GoToLoop

O que faz a função bufferSize()?
What does bufferSize() function do?

http://code.Compartmental.net/minim/audioplayer_method_buffersize.html

Posso usá-la fora do draw()?
Can I use it outside draw()?

Como afirmara antes:

Infelizmente ñ devemos modificar o canvas do sketch fora do Thread "Animation".

As I had stated before:

Unfortunately we shouldn't modify sketch's canvas outside "Animation" Thread.

Método bufferSize() do AudioPlayer ñ modifica o canvas do sketch em nada.
AudioPlayer's bufferSize() method doesn't change sketch's canvas at all.

Mas é claramente óbvio line() faz exatamente isso! :-\"
But it's clearly obvious line() does exactly that! :-\"

lviensen

O que faz a função groove.left.get(i)*50? Posso usá-la fora do draw()?

       for(int i = 0; i < groove.bufferSize() - 1; i++)
       {     
            groove.play();
            line(i, 50  + groove.left.get(i)*50,  i+1, 50  + groove.left.get(i+1)*50);
            line(i,150 + groove.right.get(i)*50, i+1,150 + groove.right.get(i+1)*50);
       }

lviensen

@GoToLoop, fiz um programa usando praticamente toda a tela do computador, mas a linha não está indo até o final (height). Como posso melhorar isso?

GoToLoop

Tem q saber os valores mínimo & máximo q y varia pra poder fazer o map() de 0 & height:
https://Processing.org/reference/map_.html