libopus 1.2.1 This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz. This only happens on a few clips, but it is good to update to avoid a potential loss of quality. libopus 1.2 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-06 (the mono downmix and the folding fixes need --enable-update-draft) Many bug fixes, including integer wrap-arounds discovered through fuzzing (no security implications). libopus 1.1.5 May 24, 2017 This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. libopus 1.1.4 Jan 20, 2017 This Opus 1.1.4 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, our own analysis shows that no remote code execution is possible. However, we are making this release as a precaution. libopus 1.1.3 This Opus 1.1.3 release focuses mainly on optimizations and bug fixes. Changes include: Neon optimizations improving 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) None of the bugs that were fixed were regressions over previous releases. libopus 1.1.2 Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specific optimizations; and Fixes hybrid mode discontinuous transmission (DTX) operation, where the comfort noise above 8 kHz was incorrectly estimated and could oscillate in time. libopus 1.1.1 Opus 1.1.1 includes: x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems, MIPS intrinsics optimizations contributed by Imagination Technologies, ARM Neon optimizations contributed by Linaro and ARM, many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, and several minor bug fixes. libopus 1.1 - new analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR), - automatic detection of speech or music to decide which encoding mode to use, - surround with good quality at 128 kbps for 5.1 and usable down to 48 kbps, and - speed improvements on all architectures, especially ARM, where decoding uses around 40% less CPU and encoding uses around 30% less CPU. libopus 1.0.2 Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is very low. Other changes include fixes and improvements to the PLC and hybrid mode quality improvements. As usual, this release is fully compliant with the Opus specification. libopus 1.0.1-RC3 This is a third release candidate for the upcoming 1.0.1 release. This release includes documentation fixes, portability improvements, and build file fixes, including a generic Makefile.unix. Release Candidates for Opus 1.0.0 and 1.0.1 8 August, 2012 Release candidates for the upcoming 1.0.0 and 1.0.1 releases are now available. Expect the final 1.0.0 release in the next few weeks along with the final Opus RFC. Version 1.0.1 will be released at the same time and includes minor fixes that did not make it to the RFC. Source code is available from the downloads page. libopus 0.9.14 This version matches version -14 of the draft and fixes minor issues brought up before the upcoming IETF last call. There is no change to the bit-stream. Source code: opus-0.9.14.tar.gz Internet-Draft: draft-ietf-codec-opus-14.txt opus-tools 0.1.3 This release adds proper multichannel WAV output from opusdec, disables the non-working --stereo and --mono mixdown switches, and uses linear predictive coding to generate padding on the final frame to reduce pre-echo artefacts. Source code: opus-tools-0.1.3.tar.gz opus-tools 0.1.2 Numerous small fixes including piped audio on Windows and clicking on resampled audio. Source code: opus-tools-0.1.2.tar.gz Historic development releases Libopus versions 11-13 were skipped to synchronize release and draft numbering. libopus 0.9.10 This version matches version -12 of the draft and fixes minor issues brought up before the upcoming IETF last call. There is no change to the bit-stream. Source code: opus-0.9.10.tar.gz Internet-Draft: draft-ietf-codec-opus-12.txt libopus 0.9.9 This version matches version -11 of the draft. The bit-stream has not changed, except for some corner cases that are unlikely to happen in the real world. Source code: opus-0.9.9.tar.gz Internet-Draft: draft-ietf-codec-opus-11.txt libopus 0.9.8 This version matches version -10 of the draft and fixes several glitches caused by mode switching and other corner cases. This required breaking the bit-stream for the SILK-only stereo and hybrid stereo modes. Fortunately, these modes are not often used, so few users should be affected. This release also implements a CBR mode for SILK mode. This release includes a much better test suite and has been extensively tested in multiple configurations. See the Jenkins build system and the resulting floating-point coverage and fixed-point coverage. Now that the analysis and documentation of the code has been completed, further changes to the bit-stream unfil the final freeze are unlikely. Source code: opus-0.9.8.tar.gz Internet-Draft: draft-ietf-codec-opus-10.txt libopus 0.9.6 This is a cleanup release for version -08 of the draft. The bit-stream remains tentatively frozen. Source code: opus-0.9.6.tar.gz Internet-Draft: draft-ietf-codec-opus-08.txt libopus 0.9.5 This is a cleanup release for version -07 of the draft. The bit-stream is tentatively frozen. It will not change unless an major issue is found or if for some reason the Working Group decides something needs to be change. Source code: opus-0.9.5.tar.gz Internet-Draft: draft-ietf-codec-opus-07.txt libopus 0.9.2 Opus libopus 0.9.2 adds support for glitchless switching between the voice and audio mode. Also, the encoder now defaults to a new "automatic" mode and bandwidth selection and attempts to select the optimal mode and bandwidth considering the bit-rate and voice content. Several bugs were also fixed and the codec and test tools should be more robust in general. Source code: opus-0.9.2.tar.gz Internet-Draft: draft-ietf-codec-opus-04.txt libopus 0.9.1 Opus libopus 0.9.1 fixes a few minor bugs that were found in version libopus 0.9.0. Unfortunately, this has required slight changes to the bit-stream, which is thus not compatible with libopus 0.9.0. This release adds support for forward error correction (FEC), which improves performance under packet loss. Source code: opus-0.9.1.tar.gz Internet-Draft: draft-ietf-codec-opus-03.txt

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