Thanks for raising that. Since I can’t comment on that issue directly, let me
respond here to the claim by Alex Z. that “it’s not so bad”:
I agree that the code snippet he posted doesn’t look too bad, at least for the
async case.
But!! Consider the following:
1. We never closed the stream. Is this “fine” or are we leaking an OS file
handle?
We also never closed the clip. Who knows what that leaks? Maybe a thread or
two?
(If we need not close these, the docs should make that clearer; I think we do.)
I see the JDK code has a concept of an auto-closing clip but the docs don’t
mention it.
2. But of course, we can’t close the clip or the stream, or else playback
ends.
Thus we must wait for it to finish. So the whole async approach is not viable.
The REAL way to do async is to actually to do sync, but on another thread.
3. So how do we do sync then? The example code by Alex Z uses busy
looping.
Nice and simple for short clips, but pretty rude if the clip lasts more than a
few seconds.
Easy fix:
try{Thread.sleep(clip. getMicrosecondLength/1000);}
catch(InterruptedException impossible){Thread.currentThread.interrupt();}
4. This works for .wav files but not some of the more obscure file types
that Java supports.
(In fact I don’t think it’s even guaranteed to work for ALL wav files.)
It works only for files encoded using PCM.
If you try to open a .au file, you’ll likely get an exception during playback.
To support EVERYTHING, we need to basically copy/paste the implementation of
com.sun.media.sound.Toolkit#getPCMConvertedAudioInputStream
Not so simple any more.
From: Philip Race <[email protected]>
Sent: Monday, January 8, 2024 3:05 PM
To: Yagnatinsky, Mark : Markets Pre Trade <[email protected]>;
[email protected]
Cc: [email protected]
Subject: Re: the easiest ways to play an audio clip are the discouraged ones
CAUTION: This email originated from outside our organisation -
[email protected]<mailto:[email protected]> Do not click on links,
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Mark,
It does seem like there's an ease of use gap here that will widen considerably
when Applet is removed.
The Applet AudioClip code is actually built on top of javax.sound public APIs
so we should at least
find an alternative place to surface that functionality.
I submitted
https://bugs.openjdk.org/browse/JDK-8323215<https://clicktime.symantec.com/15t5ejgC3n4Z2qVqt9Uzx?h=KL29DCPORvn7BrJRUY9MkcWCJvOw3Ti8Sa0X4iwSGd0=&u=https://bugs.openjdk.org/browse/JDK-8323215>
-phil.
On 1/1/24 10:27 PM,
[email protected]<mailto:[email protected]> wrote:
Thanks Julian (and sorry for messing up the message threading… I’ll try not to
do that next time).
It looks like you built a “full-fledged” audio player, and it took hundreds of
lines of code.
Maybe that’s reasonable for a full-fledged audio player.
But it’s unfortunate that even a basic “fire and forget” feature to play an
audio file should take lots of lines.
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