[MPlayer-users] ao-alsa noise...

[ephemeron at softhome.net]

On 10. June 2004 at 11:19PM +0200,
gabor <gabor at z10n.net> wrote:

> On Thu, 2004-06-10 at 18:52 +0800, ephemeron at softhome.net wrote:
> > On 10. June 2004 at 12:18AM +0200,
> > gabor <gabor at z10n.net> wrote:
> >
> > > i have an acer800laptop...it has an intel sound chip (users
> > > the snd-intel8x0 alsa module).  but now, with the unified
> > > 'alsa' driver, i sometimes get noises into the video
> > > playback...
> 
> > Somebody posted a patch a few days ago.  Basically it changes the
> > following unique line in {MPLAYER-SOURCE-ROOT}/libao2/ao_alsa.c:
> > 
> > #undef SET_CHUNKSIZE
> > 
> > to
> > 
> > #define SET_CHUNKSIZE
> > 
> > Try "grep 'def.*SET_CHUNKSIZE' ./libao2/ao_alsa*" to compare
> > the differences between the alsa9, alsa1x and unified alsa
> > output drivers. "#define SET_CHUNKSIZE" is in alsa1x.
> 
> wow...it fixes my problem...
> 
> the line
> alsa: 48000 Hz/2 channels/4 bpf/32768 bytes buffer/Signed 16 bit Little
> Endian
> 
> changed into:
> alsa: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little
> Endian
> 
> can you point me to the original discussion? the name of the
> thread?

From: sebek64 at post.cz (Marcel Sebek)
To: mplayer-users at mplayerhq.hu
Subject: [MPlayer-users] problems with ao_alsa

His post contains patches for two other problems which I haven't
yet encountered (or noticed).

> and was the patch considered to be included? was it rejected?

I don't think so. I did a CVS checkout today, and noticed that
there was an update to libao2/ao_alsa.c, but the line still reads
"#undef SET_CHUNKSIZE".

I beginning to suspect this problem affects only onboard sound
chips or some developer would have noticed it by now.