From Juraj.Svec at Sun.COM  Tue Dec 11 14:34:11 2007
From: Juraj.Svec at Sun.COM (Juraj Svec)
Date: Tue, 11 Dec 2007 23:34:11 +0100
Subject: <Sound Dev> Opening multiple output lines
Message-ID: <475F1063.6080109@sun.com>

Hi,
could you please send some more information? Output of the 
TRACE1("Opening ALSA device %s\n", buffer); above the snd_pcm_open would 
be great and also your sound card type and version will definitely help.

Thanks,

Juraj


 > Hi,
 >
 > I'm testing a sound-using applet on Fedora 8.  Sun JDK 1.6 runs the 
applet
 > correctly but OpenJDK does not.  The applet attempts to open two 
audio playback
 > lines in succession, without closing the first before attempting to 
open the
 > second.  The first open attempt succeeds but the second attempt fails 
with:
 >
 > javax.sound.sampled.LineUnavailableException: line with format 
PCM_SIGNED
 > 44100.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian not supported.
 >          at
 > 
com.sun.media.sound.DirectAudioDevice$DirectDL.implOpen(DirectAudioDevice.java:511)
 >          at 
com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:124)
 >          at 
com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:156)
 >          at PAPU.start(PAPU.java:198)
 >          at NES.enableSound(NES.java:390)
 >          at AppletGui.init(AppletGui.java:38)
 >          at sun.applet.AppletPanel.run(AppletPanel.java:435)
 >          at java.lang.Thread.run(Thread.java:674)
 >
 > The exception message is misleading since the line format is 
supported.  The
 > actual cause of the failure is in:
 >
 > PLATFORM_API_LinuxOS_ALSA_PCMUtils.c:openPCMfromDeviceID
 >
 > This call:
 >
 >      ret = snd_pcm_open(handle, buffer,
 > 
isSource?SND_PCM_STREAM_PLAYBACK:SND_PCM_STREAM_CAPTURE,
 >                         SND_PCM_NONBLOCK);
 >
 > returns the error corresponding to "Device or resource busy".
 >
 > The attached test case demonstrates the failure.
 >
 > Tom
 >
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