gst/rtp/: Added very simplistic amr payloader. depayloader does not work yet.

gst/rtp/: Added very simplistic amr payloader. depayloader does not work yet.

Original commit message from CVS:
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpamrdec.c: (gst_rtpamrdec_get_type),
(gst_rtpamrdec_base_init), (gst_rtpamrdec_class_init),
(gst_rtpamrdec_init), (gst_rtpamrdec_chain),
(gst_rtpamrdec_set_property), (gst_rtpamrdec_get_property),
(gst_rtpamrdec_change_state), (gst_rtpamrdec_plugin_init):
* gst/rtp/gstrtpamrdec.h:
* gst/rtp/gstrtpamrenc.c: (gst_rtpamrenc_get_type),
(gst_rtpamrenc_base_init), (gst_rtpamrenc_class_init),
(gst_rtpamrenc_init), (gst_rtpamrenc_chain),
(gst_rtpamrenc_set_property), (gst_rtpamrenc_get_property),
(gst_rtpamrenc_change_state), (gst_rtpamrenc_plugin_init):
* gst/rtp/gstrtpamrenc.h:
* gst/rtp/gstrtpmpaenc.c: (gst_rtpmpaenc_class_init),
(gst_rtpmpaenc_flush), (gst_rtpmpaenc_chain):
Added very simplistic amr payloader. depayloader does not
work yet.