How to completely load audio but play it later?

Question

So, I have an AudioInputStream, which reads from a FileInputStream. I want to close the FileInputStream which will close the AudioInputStream.

Is there any way to load the audio completely, so that I don't have to stream it directly from the file?

Audio files can be really big - are you sure you want to cache it in RAM? — Ron Kuper, May 19 '15 at 14:56
yes, I am making a library to manage assets, and I already have it set up to load the asset from a file, then close the fileinputstream. Image files can also be very big, and I do the same thing with them. — Mrab Ezreb, May 19 '15 at 14:57
Youu can read the file into memory and then create a ByteArrayInputStream on top of the memory buffer and play audio from that. — Ron Kuper, May 19 '15 at 14:58
I think that while I was looking around, I found an idea something like that. The only issue is that it doesn't keep the format information, so it will throw an unsupported audio exception. — Mrab Ezreb, May 19 '15 at 14:59
You are providing information that is relevant to your question within comments. Don't do that; instead update your question. — GhostCat, May 19 '15 at 15:00
@Mrab Ezreb just specify the format yourself using the apropriate constructor: http://docs.oracle.com/javase/7/docs/api/javax/sound/sampled/AudioInputStream.html#AudioInputStream(java.io.InputStream,%20javax.sound.sampled.AudioFormat,%20long) — ortis, May 19 '15 at 15:00

score 1 · Accepted Answer · edited May 20 '15 at 07:10

1

You can store it in a Java Clip.

Example:

Clip clip = AudioSystem.getClip();
clip.open(/*your AudioInputStream*/);

Make clip a field, to use it later.

edited May 20 '15 at 07:10

Andrew Thompson

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answered May 19 '15 at 15:04

Steffen E

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man, am I dumb. I knew about clips, but I never thought to use them. Thanks a lot. can't quite accept this answer yet – Mrab Ezreb May 19 '15 at 15:05

score 0 · Answer 2 · answered May 19 '15 at 15:14

If you want an AudioInputStream, you can load the entire file in to a byte array:

static AudioInputStream load(File file) throws IOException {
    try (FileInputStream in = new FileInputStream(file)) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();

        byte[] buf = new byte[4096];
        for (int b; (b = in.read(buf)) > -1;) {
            bytes.write(buf, 0, b);
        }

        return AudioSystem.getAudioInputStream(
            new ByteArrayInputStream(bytes.toByteArray());
    }
}

Or in Java 7:

static AudioInputStream load(File file) throws IOException {
    return AudioSystem.getAudioInputStream(
        new ByteArrayInputStream(Files.readAllBytes(file.toPath()));
}

How to completely load audio but play it later?

2 Answers2