Asterisk - The Open Source Telephony Project  21.4.1
External references
File app_festival.c
The Festival Speech Synthesis System - http://www.cstr.ed.ac.uk/projects/festival/
File app_jack.c
http://www.jackaudio.org/
File asterisk-opus-a959f072d3f364be983dd27e6e250b038aaef747/codecs/codec_opus_open_source.c
http://www.opus-codec.org/docs/html_api-1.1.0/
File codecs/codec_opus_open_source.c
http://www.opus-codec.org/docs/html_api-1.1.0/
File func_curl.c
Depends on the CURL library - http://curl.haxx.se/
File uuid.c
Depends on libuuid, a component of the e2fsprogs package - http://e2fsprogs.sourceforge.net/