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avif-setup.md

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Avif Setup

Compiling zng-view (or zng with "view" feature) and AVIF image format support is tricky, because it depends on the native dav1d library.

Crate Setup

On your Cargo.toml file add an avif feature and an optional dependency to the image crate that matches the version used by zng-view:

[features]
avif = ["image/avif", "image/avif-native"]

[dependencies]
image = { version = "<same version as zng-view/Cargo.toml>", default-features = false, optional = true }

Build

The general idea for building is to install all packages used by dav1d, clone and build dav1d and build the crate with the avif feature and the --cfg=zng_view_image_has_avif Rust flag.

We recommend building on a container or GitHub workflow.

On Ubuntu and macOS:

Install Python and Pip:

sudo apt install python3 -y
sudo apt install python3-pip -y

Install david Python dependencies:

pip install -U pip
pip install -U wheel setuptools
pip install -U meson ninja

Clone and build dav1d:

export DAV1D_DIR=dav1d_dir
export LIB_PATH=lib/x86_64-linux-gnu

git clone --branch 1.3.0 --depth 1 https://github.com/videolan/dav1d.git
cd dav1d
meson build -Dprefix=$HOME/$DAV1D_DIR -Denable_tools=false -Denable_examples=false -Ddefault_library=static --buildtype release
ninja -C build
ninja -C build install

export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:$HOME/$DAV1D_DIR/$LIB_PATH/pkgconfig
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/$DAV1D_DIR/$LIB_PATH

Build your crate:

export SYSTEM_DEPS_LINK=static
export RUSTFLAGS=$RUSTFLAGS --cfg zng_view_image_has_avif

cargo build --features avif

On Windows:

Install Python 3 using the latest installer at https://www.python.org/downloads/.

Install pip:

py -m ensurepip --upgrade

Install david Python dependencies:

pip install -U pip
pip install -U wheel setuptools
pip install -U meson ninja

Install NASM using the latest installer at https://www.nasm.us/pub/nasm/releasebuilds/.

Clone and build pkg-config and dav1d:

set PKG_CONFIG=c:\build\bin\pkg-config.exe
set PKG_CONFIG_PATH=C:\build\lib\pkgconfig
set PATH=%PATH%;C:\build\bin

git clone --branch meson-glib-subproject --depth 1 https://gitlab.freedesktop.org/tpm/pkg-config.git
cd pkg-config
meson build -Dprefix=C:\build --buildtype release
ninja -C build
ninja -C build install

git clone --branch 1.3.0 --depth 1 https://github.com/videolan/dav1d.git
cd dav1d
meson build -Dprefix=C:\build -Denable_tools=false -Denable_examples=false -Ddefault_library=static --buildtype release
ninja -C build
ninja -C build install

Build your crate:

set CC=clang-cl
set CXX=clang-cl
set SYSTEM_DEPS_LINK=static
set RUSTFLAGS=%RUSTFLAGS% --cfg zng_view_image_has_avif

cargo build --features avif