Objects and minim library

Core Library Questions

elunicoto..

in Core Library Questions • 11 months ago

Hi there!

I`m working on a project for a class with some mates and we are using the minim library to make an interactive app for user to "play" in some way or experiment with drawings and sounds.

The thing is that I can`t get the library to work while working with objects/classes. This is a simple example that shows what the problem is: I have two classes Circulo and Cuadrado, the first one draws an ellipse and the second draws a rectangle, I am trying to make this to also play a sound, I mean, I want that Circulo draw an ellipse and play a sound, and that Cuadrado draw a rectangle and play another sound.

I don`t know where to call for minim library, If i call it inside Circulo or cuadrado then I get errors on the "main" code (which makes sense), also the stop function doesn't work neither in Circulo nor Cuadrado..

If you could give any help with this it`d be great!

thanks!!

"main" CODE

Circulo juan;
Cuadrado nico;
boolean apretadito;
void setup(){
size(600,400);
juan = new Circulo();
nico = new Cuadrado();
}
void draw(){
background(255);
smooth();
if (!apretadito){
juan.dibujar();
} else {
nico.dibujar();
}
}
void mousePressed(){
apretadito = !apretadito;
}

CIRCULO

class Circulo{
int radio = 50;
Circulo(){
radio = 50;
}
void dibujar(){
fill(200,0,0);
ellipse(width/2, height/2, radio*2, radio*2);
}
}

CUADRADO

class Cuadrado{

void dibujar(){

fill(0,0,200);

rectMode(CENTER);

rect(width/2+150, height/2, 100, 150);

}

}

Replies(12)

amnon.owed

Re: Objects and minim library

11 months ago

In general something like this...

// globally
import ddf.minim.*;
Minim minim;
void setup() {
size(500, 500);
minim = new Minim(this);
// other code
}
class yourObject() {
AudioSample kick;
// other variables
yourObject() {
kick = minim.loadSample("BD.mp3", 2048);
// other constructor calls
}
void activate() {
kick.trigger();
}
void close() {
kick.close();
}
}
void stop() {
myObjectInstance.close(); // do this for all your objects (for example the whole arraylist)
minim.stop();
super.stop();
}

elunicoto..

Re: Objects and minim library

11 months ago

I get this error:

Cannot find anything named "ruido"

Is the void draw() ok?

import ddf.minim.*;

import ddf.minim.signals.*;

import ddf.minim.analysis.*;

import ddf.minim.effects.*;

Minim minim;

Ojito uno;

float linX, linY;

boolean suena01;

void setup() {

size(800, 600);

smooth();

frameRate(2);

uno = new Ojito(width/2, height/2);

linX= 150;

linY=150;

minim = new Minim(this);

}

void draw() {

background(0);

uno.dibujar();

uno.sonar();

uno.close();

}

class Ojito {

float posX, posY;

int ancho, alto;

AudioSample ruido;

Ojito(float posX_, float posY_) {

posX = posX_;

posY = posY_;

ancho= 80;

alto= ancho/2;

ruido = minim.loadSample("ojo01.wav");

}

void dibujar() {

noStroke();

fill(140, 234, 211);

ellipse(posX, posY, ancho, alto);

}

void sonar() {

ruido.trigger();

}

void close(){

ruido.close();

}

}

void stop() {

ruido.close();

minim.stop();

super.stop();

}

Jesse Sco..

Re: Re: Objects and minim library

11 months ago

That's because you never declare it...

elunicoto..

Re: Objects and minim library

11 months ago

It is declared in the class, or should I declare it somewhere else??

class Ojito {

float posX, posY;

int ancho, alto;

AudioSample ruido;

PhiLho

Re: Objects and minim library

11 months ago

Some problems: you close the ruido sample in draw(), so on next frame, it won't be available.
And the close() of the sketch calls ruido.close(), while it should be uno.close(): ruido is known only by the Ojito class.

elunicoto..

Re: Objects and minim library

11 months ago

uno is an instance of the class Ojito

I tried to follow the example that ammon.owed posted. I commented the line that closes ruido sample in draw and in the close() of the sketch I call uno.ruido.close() and now I´m getting NullPointerException and highlights line 45.

import ddf.minim.*;
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
Minim minim;
Ojito uno;
float linX, linY;
boolean suena01;
void setup() {
size(800, 600);
smooth();
frameRate(2);
uno = new Ojito(width/2, height/2);
linX= 150;
linY= 150;
minim = new Minim(this);
}
void draw() {
background(0);
uno.dibujar();
uno.sonar();
//uno.close();
}
class Ojito {
float posX, posY;
int ancho, alto;
AudioSample ruido;
Ojito(float posX_, float posY_) {
posX = posX_;
posY = posY_;
ancho= 80;
alto= ancho/2;
ruido = minim.loadSample("ojo01.wav");
}
void dibujar() {
noStroke();
fill(140, 234, 211);
ellipse(posX, posY, ancho, alto);
}
void sonar() {
ruido.trigger();
}
void close(){
ruido.close();
}
}
void stop() {
uno.ruido.close();
minim.stop();
super.stop();
}

amnon.owed

Re: Objects and minim library

11 months ago

Some suggestions:

Don't use frameRate(2). You want a framerate as high as possible. To slow things down, use other techniques.
Declare minim BEFORE you declare uno (since uno's loadsample depends on a minim).
Place the audio file in the data folder of your sketch.
Are you sure you want to trigger the file each frame? See solution in sonar() method.

Adapted Code

import ddf.minim.*;
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
Minim minim;
Ojito uno;
float linX = 150;
float linY= 150;
boolean suena01;
void setup() {
size(800, 600);
minim = new Minim(this);
uno = new Ojito(width/2, height/2);
smooth();
}
void draw() {
background(0);
uno.dibujar();
uno.sonar();
}
class Ojito {
float posX, posY;
int ancho, alto;
AudioSample ruido;
Ojito(float posX_, float posY_) {
posX = posX_;
posY = posY_;
ancho= 80;
alto= ancho/2;
ruido = minim.loadSample("BD.mp3");
}
void dibujar() {
noStroke();
fill(140, 234, 211);
ellipse(posX, posY, ancho, alto);
}
void sonar() {
if (frameCount%30==0) ruido.trigger();
}
void close(){
ruido.close();
}
}
void stop() {
uno.ruido.close();
minim.stop();
super.stop();
}

elunicoto..

Re: Objects and minim library

11 months ago

@ammon.owed thanks! I should have mentioned that I´m new to Processing (though you must have noticed ) I´ll chek it our later at home.

That frameRate(2) was to avoid playing the sound 60 times per second (I knew it was wrong but I couldn´t think of anything else and the sound was driving me crazy )

Can I use isPlaying() with audioSample ??

I´m plannig to create several instances of Ojito and each of them will have to play its corresponding sound after another, so I´m thinking on how to know if the previous sound has finished to play the current, and so on...

amnon.owed

Re: Objects and minim library

11 months ago

If you want this type of functionality you can use the AudioPlayer class.

elunicoto..

Re: Objects and minim library

11 months ago

@ammon thanks again! Is working nice.

What I'm trying to do now (without success) is to create 3 instances of Ojito, each of them with one different sound. I draw the 3 instalnces and I want that each instance play its sound in order without overlapping between each other.

Any tips?

import ddf.minim.*;
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
Minim minim;
Ojito arrayOjos[];
AudioPlayer[] sonidos;
void setup() {
size(600, 300);
minim = new Minim(this);
//array of sound for creating the instances of ojito
sonidos = new AudioPlayer[3];
sonidos[0] = minim.loadFile("ojo04.wav");
sonidos[1] = minim.loadFile("ojo03.wav");
sonidos[2] = minim.loadFile("ojo02.wav");
//array of Ojito
arrayOjos = new Ojito[3];
arrayOjos[0] = new Ojito(100,height/2, sonidos[0]);
arrayOjos[1] = new Ojito(300,height/2, sonidos[1]);
arrayOjos[2] = new Ojito(500,height/2, sonidos[2]);
smooth();
}
void draw() {
background(0);
for (int i = 0; i < 3; i++){
arrayOjos[i].dibujar();
}
}
// Class Ojito, receives position of the ellipse and the sound to be played
class Ojito {
float posX, posY;
int ancho, alto;
AudioPlayer ruido;
Ojito(float posX_, float posY_, AudioPlayer ruido_) {
posX = posX_;
posY = posY_;
ancho= 80;
alto= ancho/2;
ruido = ruido_;
}
void dibujar() {
noStroke();
fill(140, 234, 211);
ellipse(posX, posY, ancho, alto);
}
void sonar() {
ruido.play(0);
}
void close(){
ruido.close();
}
}
void stop() {
for (int i = 0; i < 3; i++){
arrayOjos[i].close();
}
minim.stop();
super.stop();
}

amnon.owed

Re: Objects and minim library

11 months ago

You probably want an OjitoManager class. One that you give a few strings { "ojo02.wav","ojo03.wav",etc. } or a directory and that creates the Ojito objects (including the loadfile) and manages them (play one, play the next etc.). Also you could use more of the AudioPlayer methods such as isPlaying() etc. to make what you want.

elunicoto..

Re: Objects and minim library

11 months ago

I tried with a switch and a couple of ifs and they are working, each instance play its sound after another but the thing is that they don`t wait till the previous finish, so I get sounds playing @60fps one sound played per frame.

I don't know how to fix this :S

// Import libraries
import ddf.minim.*;
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
// Create variables and arrays
Minim minim;
Ojito arrayOjos[];
Ojito cero;
AudioPlayer[] sonidos;
int contador;
boolean suena01, suena02, suena03, suena04, suena05, suena06, suena07, suena08;
// Setup
void setup() {
size(800, 600);
minim = new Minim(this);
sonidos = new AudioPlayer[8];
// load one sound per instance of Ojito
sonidos[0] = minim.loadFile("ojo04.wav");
sonidos[1] = minim.loadFile("ojo03.wav");
sonidos[2] = minim.loadFile("ojo02.wav");
sonidos[3] = minim.loadFile("ojo04.wav");
sonidos[4] = minim.loadFile("ojo03.wav");
sonidos[5] = minim.loadFile("ojo02.wav");
sonidos[6] = minim.loadFile("ojo02.wav");
sonidos[7] = minim.loadFile("ojo02.wav");
arrayOjos = new Ojito[8];
//Send posX, posY and the sound to each instance of Ojito
arrayOjos[0] = new Ojito(width/2, height/2 - 200, sonidos[0]);
arrayOjos[1] = new Ojito(width/2 + 140, height/2 - 125, sonidos[1]);
arrayOjos[2] = new Ojito(width/2 + 200, height/2, sonidos[2]);
arrayOjos[3] = new Ojito(width/2 + 140, height/2 + 125, sonidos[3]);
arrayOjos[4] = new Ojito(width/2, height/2 + 200, sonidos[4]);
arrayOjos[5] = new Ojito(width/2 -140, height/2 + 125, sonidos[5]);
arrayOjos[6] = new Ojito(width/2 - 200, height/2, sonidos[6]);
arrayOjos[7] = new Ojito(width/2 - 140, height/2 - 125, sonidos[7]);
cero = new Ojito(width/2, height/2, sonidos[0]);
smooth();
contador = 0;
}
void draw() {
background(0);
cero.dibujar(); //the "eye" in the middle
for (int i = 0; i < 8; i++){
arrayOjos[i].dibujar(); //the sorrounding eyes
}
//I use the switch to have the booleans that determine if a sound
// has to be played
switch(contador) {
case 0:
suena01 = true;
suena02 = false;
suena03 = false;
suena04 = false;
suena05 = false;
suena06 = false;
suena07 = false;
suena08 = false;
break;
case 1:
suena01 = false;
suena02 = true;
suena03 = false;
suena04 = false;
suena05 = false;
suena06 = false;
suena07 = false;
suena08 = false;
break;
case 2:
suena01 = false;
suena02 = false;
suena03 = true;
suena04 = false;
suena05 = false;
suena06 = false;
suena07 = false;
suena08 = false;
break;
case 3:
suena01 = false;
suena02 = false;
suena03 = false;
suena04 = true;
suena05 = false;
suena06 = false;
suena07 = false;
suena08 = false;
break;
case 4:
suena01 = false;
suena02 = false;
suena03 = false;
suena04 = false;
suena05 = true;
suena06 = false;
suena07 = false;
suena08 = false;
break;
case 5:
suena01 = false;
suena02 = false;
suena03 = false;
suena04 = false;
suena05 = false;
suena06 = true;
suena07 = false;
suena08 = false;
break;
case 6:
suena01 = false;
suena02 = false;
suena03 = false;
suena04 = false;
suena05 = false;
suena06 = false;
suena07 = true;
suena08 = false;
break;
case 7:
suena01 = false;
suena02 = false;
suena03 = false;
suena04 = false;
suena05 = false;
suena06 = false;
suena07 = false;
suena08 = true;
break;
}
// now I try to make the instances to play one after each other
if (suena01) {
arrayOjos[0].sonar();
}
else if (suena02) {
arrayOjos[1].sonar();
}
else if (suena03) {
arrayOjos[2].sonar();
}
else if (suena04) {
arrayOjos[3].sonar();
}
else if (suena05) {
arrayOjos[4].sonar();
}
else if (suena06) {
arrayOjos[5].sonar();
}
else if (suena07) {
arrayOjos[6].sonar();
}
else if (suena08) {
arrayOjos[7].sonar();
}
contador++;
if (contador >7) {
contador = 0;
}
}
class Ojito {
float posX, posY;
int ancho, alto;
AudioPlayer ruido;
Ojito(float posX_, float posY_, AudioPlayer ruido_) {
posX = posX_;
posY = posY_;
ancho= 80;
alto= ancho/2;
ruido = ruido_;
}
void dibujar() {
noStroke();
fill(140, 234, 211);
ellipse(posX, posY, ancho, alto);
fill(255, 40, 100);
ellipse(posX, posY, ancho/2, alto);
fill(0);
ellipse(posX, posY, ancho/3, alto*2/3);
fill(140, 234, 211);
ellipse(posX, posY, ancho/5, alto/2.5);
}
void sonar() {
ruido.play(0);
}
void close(){
ruido.close();
}
}
void stop() {
for (int i = 0; i < 8; i++){
arrayOjos[i].close();
}
minim.stop();
super.stop();
}

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