[FFmpeg-cvslog] r19234 - trunk/libavcodec/wma.c

[Sascha Sommer]

Hi,

On Samstag, 20. Juni 2009, Ivan Kalvachev wrote:
> On 6/20/09, faust3 <subversion at mplayerhq.hu> wrote:
> > Author: faust3
> > Date: Sat Jun 20 13:06:48 2009
> > New Revision: 19234
> >
> > Log:
> > Simplify run level decoding:
> > - remove unneeded vlc code < 0 check
>
> Hum, would you explain this a little bit more.
> Afaik -1 is returned when sequence that doesn't belong
> to any known vlc is met.
> This usually happens on broken streams.
>
> Can you prove that wma vlc don't have invalid sequences?
>

In libavcodec/bitstream.c build_table() the table for get_vlc2 is built
with unused codes set to -1

    for(i=0;i<table_size;i++) {
        table[i][1] = 0; //bits
        table[i][0] = -1; //codes
    }

After the tables are filled none of the table entries are -1 anymore.

Regards

Sascha