Re: [Lmuse-developer] Prefetch audio bug

[Robert J. <rj...@sp...>]

On Tuesday 17 May 2005 08:52, Robert Jonsson wrote:
> On Tuesday 17 May 2005 07:11, Jonathan Woithe wrote:
> > Testing 0.7.2pre1 over the weekend turned up an interesting bug.  If you
> > have a .med file whose playback position is at 0 (that is, the beginning
> > of the music), and it's the first song loaded into a given instance of
> > muse, hitting "play" immediately after loading the song results in a
> > torrent of
> >
> >   prefetch(): invalid write position
> >
> > messages going to stdout.  The problem appears to be that the global
> > audio prefetcher (audioPrefetch, declared in audioprefetch.cpp) is never
> > actually requested to set/initialise its position in this scenario, so
> > when play is hit the AudioPrefetch::writePos is still in its "default"
> > state of ~0.
> >
> > The problem is not apparent if the initial song position is anything
> > other than 0, or if the playback position is changed in some way first. 
> > Note that for songs initially at 0 simply hitting "rewind" doesn't clear
> > the condition: AudioPrefetch::msgSeek() ensures that if the new position
> > equals the old then nothing is done.
> >
> > To fix this, the audioprefetch position needs to be unconditionally
> > initialised to a song's initial position (even when that is 0) whenever a
> > song is loaded.  However, I don't really know the best way to fix this.
> > Any ideas?
>
> Not at the moment but it'll have a peek tonight.

...yees... the nights are that long up here... it's true... hrm
I did have a look now and think I found a fix for it. It's commited.

/Robert

>
> Thanks for poking around!
> /Robert
>
> > Regards
> >   jonathan
> >
> >
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