Updated to libopus v1.3.1.

== Opus Audio Tools ==

This is opus-tools, a set of tools to encode, inspect, and decode
audio in the Opus format.

Opus is a totally open, royalty-free, highly versatile audio codec. Opus is
unmatched for interactive speech and music transmission over the Internet, but
also intended for storage and streaming applications. It is standardized by the
Internet Engineering Task Force (IETF) as RFC 6716 which incorporated technology
from Skype's SILK codec and Xiph.Org's CELT codec. Technology

Opus can handle a wide range of audio applications, including Voice over IP,
videoconferencing, in-game chat, and even remote live music performances. It can
scale from low bit-rate narrowband speech to very high quality stereo music.
Supported features are: 

Bit-rates from 6 kb/s to 510 kb/s
Sampling rates from 8 kHz (narrowband) to 48 kHz (fullband)
Frame sizes from 2.5 ms to 60 ms
Support for both constant bit-rate (CBR) and variable bit-rate (VBR)
Audio bandwidth from narrowband to full-band
Support for speech and music
Support for mono and stereo
Support for up to 255 channels (multistream frames)
Dynamically adjustable bitrate, audio bandwidth, and frame size
Good loss robustness and packet loss concealment (PLC)
Floating point and fixed-point implementation

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[unknown]                  247     384  64.3% -lh5- de38 Sep 23  2012 README.txt
[unknown]                 1788    5523  32.4% -lh5- 2c45 Oct  6  2013 doc/opusdec.html
[unknown]                 4765   16260  29.3% -lh5- da10 Oct  6  2013 doc/opusenc.html
[unknown]                 1453    3852  37.7% -lh5- 19d7 Oct  6  2013 doc/opusinfo.html
[unknown]               119006  200452  59.4% -lh5- 7d0a Apr 28 01:32 opusdec
[unknown]               233637  425424  54.9% -lh5- 8f78 Apr 28 01:32 opusenc
[unknown]                16743   31348  53.4% -lh5- be6e Apr 28 01:32 opusinfo
[unknown]                89100  149300  59.7% -lh5- 62ec Apr 28 01:32 opusrtp
[unknown]                  157     207  75.8% -lh5- c832 Jun 20  2014 authors
[unknown]                 7695   19563  39.3% -lh5- 912b Mar 21  2018 copying
[unknown]                 1187    2450  48.4% -lh5- 4571 Mar 21  2018 man/opusdec.1
[unknown]                 3968    9620  41.2% -lh5- dc07 Sep 17  2018 man/opusenc.1
[unknown]                  952    1823  52.2% -lh5- 9a4b Jun 20  2014 man/opusinfo.1
[unknown]                  873    1959  44.6% -lh5- b572 Sep 18  2018 man/opusrtp.1
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total        14 files  481571  868165  55.5%            Apr 27 20:56