gecko-dev/media/libdav1d/README_MOZILLA

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This directory contains build files for dav1d. The actual library
source is in $TOPSRCDIR/third_party/dav1d/
Any patches or additional configuration to be applied to the
upstream source should be kept here in the media/libdav1d
directory.
To update the library source and build config files, execute
./mach vendor media/libdav1d/moz.yaml
To update to a specific upstream git tag or commit, use
./mach vendor media/libdav1d/moz.yaml -r <commit>
The upstream git repository is https://code.videolan.org/videolan/dav1d
To update to a fork, use
./mach vendor media/libdav1d/moz.yaml --repo <repository url> [-r <commit>]
The rough steps are:
- Execute ./mach vendor media/libdav1d/moz.yaml -r {tag-name} # ex: ./mach vendor media/libdav1d/moz.yaml -r 0.6.0
- Update ./moz.build and ./asm/moz.build to add new files and remove deleted ones using
third_party/dav1d/src/meson.build as a guide (confirm with the diff) (note the
empty .asm file in x86_64)
- Clone the tag from the dav1d repo and build a stand-alone libdav1d following the steps here:
https://code.videolan.org/videolan/dav1d#compile
- Copy vcs_version.h from the local build/include/vcs_version.h
to media/libdav1d/vcs_version.h
- Copy version.h from local build/include/dav1d/version.h to
media/libdav1d/version.h
- Add new options, if any, in moz.build or config.h
Tips:
- If you see build failures in build-linux64-base-toolchains (or
similar jobs) dav1d may now require a higher minimum nasm version
than our base toolchains currently support. A bug updating the
minimum nasm version will probably be necessary.