Re: [Banshee-List] Automatic Rating

["Gabriel Burt" <gabriel burt gmail com>]

On Fri, Oct 3, 2008 at 2:02 PM, Brian Lucas <bcl1713 gmail com> wrote:
> I would like to do some work or help with work on an extension regarding
> this bug: http://bugzilla.gnome.org/show_bug.cgi?id=419844.  I really like
> the algorithm that Amarok uses for this purpose but I'm not sure if it will
> be implementable in banshee as I'm not sure if the required information is
> retained or available upon track change.  Here is the algorithm from Amarok
> in ruby:
>
>  if( playcount <= 0 ) # not supposed to be less, but what the hell.
>      newscore = ( prevscore + percentage ) / 2
>  else
>      newscore = ( ( prevscore * playcount ) + percentage ) / ( playcount + 1
> )
>  end

Where does prevscore get initialized?  Is it initialized to zero?
What is percentage?  Can you explain the logic of the algorithm in
English?  Looking at the code, I don't quite get why things are the
way they are.

Thanks,

Gabriel