Importing a list of songs

dragonvlame

Hi,

For an audio-visualising app I am looking for a way to import music from a folder or just get a list or array in the sketch itself. Is this possible and how can I do this? I am using processing 2.2 on a windows 8 computer.

GoToLoop

This thread below got a full example on how to get a File[] from some user-chosen folder:
http://forum.processing.org/two/discussion/6004/how-to-make-a-movie-array

Basically we use FilenameFilter interface + listFiles() method in order to only get the extensions we want to:

import java.io.FilenameFilter;

static final FilenameFilter pictFilter = new FilenameFilter() {
  final String[] EXTS = {
    ".png", ".jpg", ".jpeg", ".gif"
  };

  @ Override boolean accept(final File dir, String name) {
    name = name.toLowerCase();
    for (final String ext: EXTS)  if (name.endsWith(ext))  return true;
    return false;
  }
};

Just replace the image extensions w/ audio 1s. Of course, rename pictFilter to something like sndFilter! (*)

dragonvlame

@GoToLoop: You don't have to install that library? The webpage is a bit confusing.... :P

And Do you have to use alll the code you used in the thread about the movie array? all the voids and everything?

GoToLoop

You don't have to install that library?

That example doesn't use any 3rd-party libraries. Only standard Java's!

... have to use alll the code you used in the thread about the movie array?

That example is about displaying pictures from a folder. You gotta adapt it for your particular needs!

dragonvlame

Thanks a lot!!!

dragonvlame

Okay... @GoToLoop, I've tried your sketch just the way it is without changing things. I get a pop up screen when clicking on the screen. I can only select folders? And when I select one I still get a black screen. How does this work? :p Sorry for being such a nuisance

GoToLoop

I can only select folders?

That's true! It uses selectFolder() rather than selectInput():
http://processing.org/reference/selectFolder_.html
http://processing.org/reference/selectInput_.html

And when I select one I still get a black screen.

As you can see inside new FilenameFilter():

final String[] EXTS = {
  ".png", ".jpg", ".jpeg", ".gif"
};

It only reads file names w/ those extensions! So we gotta choose a folder w/ at least 1 of those type of files.
listFiles() invokes that accept() customized method in order to filter them out.
As I've already mentioned, you gotta replace those w/ the 1s you're gonna need!

dragonvlame

I've been through your code, but where can I find the part to what has happened with the selected file? The screen stays black

GoToLoop

This is the code which invokes the folder select pop-up window:

void mouseClicked() {
  selectFolder("Select a folder to process:", "folderSelected");
}

Once it's done and closed, it invokes folderSelected():
Which in turn calls up getFolderContent():

protected static final File[] getFolderContent(final File dir) {
  return dir.listFiles(pictFilter);
}

Which returns a File[] filter out by listFiles() + pictFilter!

P.S.: You don't need to use neither selectFolder() nor selectInput() if you got a fixed path where your files are!