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Re: kern/52175: audio sometimes stutters
The following reply was made to PR kern/52175; it has been noted by GNATS.
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/52175: audio sometimes stutters
Date: Tue, 25 Apr 2017 22:20:07 +0200
On Tue, Apr 25, 2017 at 10:17:35PM +0200, Manuel Bouyer wrote:
> I'm also hearing problems on a allwinner A20 (920Mhz ARM cortex-A7),
> which seems related to ossaudio. When playing a file with mplayer
> (which, I believe, uses ossaudio), there is stops and clicks
> in the output. Playing the same file with audioplay is as perfect
> as it can be. The file is:
> RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 44100 Hz
> Also, playing a sound from opencpn (which uses portaudio2, which uses
> ossaudio). It hangs. ktrace shows what looks like an endless loop writing
> the same 64k data block again and again (the file itself is less than 128KB,
> but larger files shows the same behavior), at a very low rate.
> I don't hear anything on output but maybe that's because the file
> is played at a very low rate.
Note that the hardware can only do 48Khz, 16 or 24 bits.
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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