Release 1.1.2

Release 1.1.3

This is a minor release focusing mainly on optimizations and bug fixes.
Changes include:
- Neon optimizations inproving performance on ARMv7 and ARMv8 by up to 15%
- Fixes some issues with 16-bit platforms (e.g. TI C55x)
- Fixes to comfort noise generation (CNG)
- Documenting that PLC packets can also be 2 bytes
- Includes experimental ambisonics work (--enable-ambisonics)

Opus release 1.1.4

This release fixes a single bug. A specially-crafted Opus packet could cause
an integer wrap-around in the SILK LSF stabilization code. This would cause
an out-of-bounds read 256 bytes before a constant table. In most circumstances,
the consequences are harmless and the result is simply noise in the audio.

This was reported as CVE-2017-0381. Contrary to that report, we do not believe
that any remote code execution is possible. However, we are making this release
as a precaution.

Release 1.2-alpha

This is an alpha release with many improvements, including:
- Speech quality improvements especially in the 12-20 kbit/s range
- Improved VBR encoding for hybrid mode
- More aggressive use of wider speech bandwidth, including fullband speech
    starting at 14 kbit/s
- Music quality improvements in the 32-48 kb/s range
- Generic and SSE CELT optimizations
- Support for directly encoding packets up to 120 ms
- DTX support for CELT mode
- SILK CBR improvements
- Support for all of the fixes in draft-ietf-codec-opus-update-04 (the mono
    downmix and the folding fixes need --enable-update-draft)
- Many bug fixes, including integer overflows discovered through fuzzing
    (no security implications)

Release 1.2-alpha2

This release changes the tonality analysis to run at 24 kHz, which reduces
complexity while giving better frequency resolution for the tonality
estimate. There's also a few bug fixes.