useful for AMR and RA144. Patch by Kenan Gillet Originally committed as revision 17546 to svn://svn.ffmpeg.org/ffmpeg/trunk
Part of the QCELP patch by Kenan Gillet, kenan.gillet gmail com Originally committed as revision 15754 to svn://svn.ffmpeg.org/ffmpeg/trunk
patch by Kenan Gillet, kenan.gillet gmail com Originally committed as revision 15680 to svn://svn.ffmpeg.org/ffmpeg/trunk