Implement "generate_silence()" function for the G.722 and GSM codecs.
Implement "generate_silence()" function for the G.722 and GSM
codecs.

jevonearth/rtpproxy,sippy/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,hongbinz/rtpproxy,hongbinz/rtpproxy,Vocalocity/rtpproxy-pre,hongbinz/rtpproxy,sippy/rtpproxy,dsanders11/rtpproxy,dsanders11/rtpproxy,jevonearth/rtpproxy,dsanders11/rtpproxy,Vocalocity/rtpproxy-pre,jevonearth/rtpproxy,Vocalocity/rtpproxy-pre,hongbinz/rtpproxy,synety-jdebp/rtpproxy,sippy/rtpproxy,Vocalocity/rtpproxy-pre,jevonearth/rtpproxy