Initial commit for dav1d

dav1d is an AV1 Decoder

CONTRIBUTING.md

+# Dav1d contribution guide
+
+## CoC
+The [VideoLAN Code of Conduct](https://wiki.videolan.org/CoC) applies to this project.
+
+## Codebase language
+
+The codebase is developed with the following assumptions:
+
+For the library:
+- C language with C99 version, without the VLA or the Complex (*\_\_STDC_NO_COMPLEX__*) features, and without compiler extension,
+- asm in .asm files, using the NASM syntax,
+- no C++ is allowed, whatever the version.
+
+For the tools and utils:
+- C *(see above for restrictions)*
+- Rust
+- C++ only for the MFT.
+
+If you want to use *Threads* or *Atomic* features, please conform to the **C11**/**POSIX** semantic and use a wrapper for older compilers/platforms *(like done in VLC)*.
+
+Please use modern standard POSIX functions *(strscpy, asprintf, tdestroy)*, and provide a compatibility fallback *(like done in VLC)*.
+
+We will make reasonable efforts for compilers that are a bit older, but we won't support gcc 3 or MSVC 2012.
+
+## Authorship
+
+Please provide a correct authorship for your commit logs, with a name and a valid email.
+
+We will reject anonymous contributions for now. As an exception, known pseudonyms from the multimedia community are accepted.
+
+This project is respecting **Copyright** and **Droit d'auteur**. There is no copyright attribution or CLA.
+
+## Commit logs
+
+Please read [How to Write a Git Commit Message](https://chris.beams.io/posts/git-commit/).
+
+## Submit requests (WIP)
+
+- Code
+- Test
+- Try
+- Submit patches
+
+## Patent license
+
+You need to read and understand the [AV1 patents license](doc/PATENTS), before committing.

COPYING

+Copyright © 2018, VideoLAN and dav1d authors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. 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.
+
+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.

NEWS

+Changes for 0.0.1:
+------------------
+
+Initial release

README.md

+# dav1d
+
+**dav1d** is a new **AV1** cross-platform **D**ecoder, open-source, and focused on speed and correctness.
+
+The canonical repository URL for this repo is https://code.videolan.org/videolan/dav1d
+
+## Goal and Features
+
+The goal of this project is to provide a decoder for **most platforms**, and achieve the **highest speed** possible to overcome the lack of AV1 hardware decoder.
+
+It aims to support all features from AV1, including all subsampling and bit-depth parameters.
+
+In the future, this project will host simple tools or simple wrappings *(like, for example, an MFT transform)*.
+
+## License
+
+**dav1d** is released under a very liberal license, a contrario from the other VideoLAN projects, so that it can be embedded anywhere, including non-open-source software; or even drivers, for hybrid decoders.
+
+The reasoning behind this decision is the same as for libvorbis, [RMS on vorbis](https://lwn.net/2001/0301/a/rms-ov-license.php3).
+
+# Roadmap
+
+The plan is the folllowing:
+
+1. Complete C implementation of the decoder,
+2. Provide a usable API,
+3. Port to most platforms,
+4. Make it fast, by writing asm.
+
+By the end of 2018, we hope to have a completely usable version that will be faster than any other software open source implementation.
+
+# Contribute
+
+Currently, we are looking for help from:
+- C developers,
+- asm developers,
+- platform-specific developers.
+
+Our contributions guidelines are strict. We want to build a coherent codebase to simplify maintenance and achieve the highest possible speed.
+
+Notably, the codebase is in pure C and asm.
+
+We are on IRC, on the **#dav1d** channel on *Freenode*.
+
+See the [contributions document](CONTRIBUTING.md).
+
+## CLA
+
+There is no CLA.
+
+People will keep their copyright and their authorship rights.
+
+VideoLAN will only have the collective work rights.
+
+## CoC
+
+The [VideoLAN Code of Conduct](https://wiki.videolan.org/CoC) applies to this project.
+
+# Compile
+
+1. Install [Meson](https://mesonbuild.com/)
+2. Run `meson build`
+
+# Support
+
+This project is partially funded by the *Alliance for Open Media*/**AOM** and is supported by TwoOrioles and VideoLabs.
+
+These 2 companies can provide support and integration help, should you need it.
+
+
+# FAQ
+
+## Why do you not improve libaom rather than starting a new project?
+
+- We believe that libaom is a very good library. It was however developed for research purposes during AV1 design.  
+We think that an implementation written from scratch can achieve faster decoding, in the same way that *ffvp9* was faster than *libvpx*.
+
+## Is dav1d a recursive acronym?
+
+- Yes.
+
+## Can I help?
+
+- Yes. See the [contributions document](CONTRIBUTING.md).
+
+## I am not a developer. Can I help?
+
+- Yes. We need testers, bug reporters, and documentation writers.
+
+## What about the AV1 patent license?
+
+This project is an implementation of a decoder. It gives you no special rights on the AV1 patents.
+
+Please read the [AV1 patent license](doc/PATENTS) that applies to the AV1 specification and codec.

doc/PATENTS

+Alliance for Open Media Patent License 1.0
+
+1. License Terms.
+
+1.1. Patent License. Subject to the terms and conditions of this License, each
+     Licensor, on behalf of itself and successors in interest and assigns,
+     grants Licensee a non-sublicensable, perpetual, worldwide, non-exclusive,
+     no-charge, royalty-free, irrevocable (except as expressly stated in this
+     License) patent license to its Necessary Claims to make, use, sell, offer
+     for sale, import or distribute any Implementation.
+
+1.2. Conditions.
+
+1.2.1. Availability. As a condition to the grant of rights to Licensee to make,
+       sell, offer for sale, import or distribute an Implementation under
+       Section 1.1, Licensee must make its Necessary Claims available under
+       this License, and must reproduce this License with any Implementation
+       as follows:
+
+       a. For distribution in source code, by including this License in the
+          root directory of the source code with its Implementation.
+
+       b. For distribution in any other form (including binary, object form,
+          and/or hardware description code (e.g., HDL, RTL, Gate Level Netlist,
+          GDSII, etc.)), by including this License in the documentation, legal
+          notices, and/or other written materials provided with the
+          Implementation.
+
+1.2.2. Additional Conditions. This license is directly from Licensor to
+       Licensee.  Licensee acknowledges as a condition of benefiting from it
+       that no rights from Licensor are received from suppliers, distributors,
+       or otherwise in connection with this License.
+
+1.3. Defensive Termination. If any Licensee, its Affiliates, or its agents
+     initiates patent litigation or files, maintains, or voluntarily
+     participates in a lawsuit against another entity or any person asserting
+     that any Implementation infringes Necessary Claims, any patent licenses
+     granted under this License directly to the Licensee are immediately
+     terminated as of the date of the initiation of action unless 1) that suit
+     was in response to a corresponding suit regarding an Implementation first
+     brought against an initiating entity, or 2) that suit was brought to
+     enforce the terms of this License (including intervention in a third-party
+     action by a Licensee).
+
+1.4. Disclaimers. The Reference Implementation and Specification are provided
+     "AS IS" and without warranty. The entire risk as to implementing or
+     otherwise using the Reference Implementation or Specification is assumed
+     by the implementer and user. Licensor expressly disclaims any warranties
+     (express, implied, or otherwise), including implied warranties of
+     merchantability, non-infringement, fitness for a particular purpose, or
+     title, related to the material. IN NO EVENT WILL LICENSOR BE LIABLE TO
+     ANY OTHER PARTY FOR LOST PROFITS OR ANY FORM OF INDIRECT, SPECIAL,
+     INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER FROM ANY CAUSES OF
+     ACTION OF ANY KIND WITH RESPECT TO THIS LICENSE, WHETHER BASED ON BREACH
+     OF CONTRACT, TORT (INCLUDING NEGLIGENCE), OR OTHERWISE, AND WHETHER OR
+     NOT THE OTHER PARTRY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+2. Definitions.
+
+2.1. Affiliate.  “Affiliate” means an entity that directly or indirectly
+     Controls, is Controlled by, or is under common Control of that party.
+
+2.2. Control. “Control” means direct or indirect control of more than 50% of
+     the voting power to elect directors of that corporation, or for any other
+     entity, the power to direct management of such entity.
+
+2.3. Decoder.  "Decoder" means any decoder that conforms fully with all
+     non-optional portions of the Specification.
+
+2.4. Encoder.  "Encoder" means any encoder that produces a bitstream that can
+     be decoded by a Decoder only to the extent it produces such a bitstream.
+
+2.5. Final Deliverable.  “Final Deliverable” means the final version of a
+     deliverable approved by the Alliance for Open Media as a Final
+     Deliverable.
+
+2.6. Implementation.  "Implementation" means any implementation, including the
+     Reference Implementation, that is an Encoder and/or a Decoder. An
+     Implementation also includes components of an Implementation only to the
+     extent they are used as part of an Implementation.
+
+2.7. License. “License” means this license.
+
+2.8. Licensee. “Licensee” means any person or entity who exercises patent
+     rights granted under this License.
+
+2.9. Licensor.  "Licensor" means (i) any Licensee that makes, sells, offers
+     for sale, imports or distributes any Implementation, or (ii) a person
+     or entity that has a licensing obligation to the Implementation as a
+     result of its membership and/or participation in the Alliance for Open
+     Media working group that developed the Specification.
+
+2.10. Necessary Claims.  "Necessary Claims" means all claims of patents or
+      patent applications, (a) that currently or at any time in the future,
+      are owned or controlled by the Licensor, and (b) (i) would be an
+      Essential Claim as defined by the W3C Policy as of February 5, 2004
+      (https://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential)
+      as if the Specification was a W3C Recommendation; or (ii) are infringed
+      by the Reference Implementation.
+
+2.11. Reference Implementation. “Reference Implementation” means an Encoder
+      and/or Decoder released by the Alliance for Open Media as a Final
+      Deliverable.
+
+2.12. Specification. “Specification” means the specification designated by
+      the Alliance for Open Media as a Final Deliverable for which this
+      License was issued.
+