oxideav-opus third-party notices
================================
This crate is distributed under the MIT license (see LICENSE) and
additionally incorporates material from the following upstream
projects. Their copyright notices and license terms are reproduced
below and apply to the incorporated material.
libopus (Xiph.Org Foundation / Skype)
-------------------------------------
The SILK stereo prediction / quantisation tables in
`src/silk/tables.rs` (`STEREO_PRED_JOINT_ICDF`,
`STEREO_UNIFORM3_ICDF`, `STEREO_UNIFORM5_ICDF`,
`STEREO_ONLY_CODE_MID_ICDF`, `STEREO_PRED_QUANT_Q13`) are transcribed
verbatim from the libopus reference implementation, file
`silk/tables_other.c`. They are required for bit-exact decoder
output compatibility with the reference.
Other files in the SILK decoder (`src/silk/mod.rs`, `src/silk/lsf.rs`,
`src/decoder.rs`) reference libopus function names (e.g.
`silk_Decode`, `silk_stereo_MS_to_LR`, `silk_stereo_decode_pred`,
`tf_decode`) and layout in comments for cross-reference with the
reference implementation. These files are independent Rust
re-implementations of the algorithms described in the Opus
specification (RFC 6716), not ports of libopus source code, but are
listed here for completeness.
Algorithmic re-implementations of the Opus RFC 6716 specification
throughout this crate are independent Rust code and do not reproduce
libopus source. The attribution above applies only to the verbatim
tables identified above.
libopus is distributed under the following terms:
Copyright 2001-2023 Xiph.Org, Skype Limited, Octasic,
Jean-Marc Valin, Timothy B. Terriberry,
CSIRO, Gregory Maxwell, Mark Borgerding,
Erik de Castro Lopo, Mozilla, Amazon
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Opus is subject to the royalty-free patent licenses which are
specified at:
Xiph.Org Foundation:
https://datatracker.ietf.org/ipr/1524/
Microsoft Corporation:
https://datatracker.ietf.org/ipr/1914/
Broadcom Corporation:
https://datatracker.ietf.org/ipr/1526/