amrnb - AMR Narrow Band Speech Codec

This library is an effort to link against the amrnb-codec,
standardized by the 3GPP, and used in modern mobile-phones
when recording video or speech, for example.

The library itself is actually just a wrapper around the original
code released by 3GPP.

You will need to get the 26104-700.zip file and place it in the same
directory as the SlackBuild script *before* attempting to build this.
See the following page for more information:
  http://www.3gpp.org/ftp/Specs/html-info/26104.htm
A direct link to the zip file is here:
  http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-700.zip