Add AVIF plugin (decoder + encoder using libavif) (#5201)

Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

.ci/install.sh

@@ -23,7 +23,7 @@ if [[ $(uname) != CYGWIN* ]]; then
     sudo apt-get -qq install libfreetype6-dev liblcms2-dev libtiff-dev python3-tk\
                              ghostscript libjpeg-turbo8-dev libopenjp2-7-dev\
                              cmake meson imagemagick libharfbuzz-dev libfribidi-dev\
-                             sway wl-clipboard libopenblas-dev
+                             sway wl-clipboard libopenblas-dev nasm
 fi
 
 python3 -m pip install --upgrade pip
@@ -62,6 +62,9 @@ if [[ $(uname) != CYGWIN* ]]; then
     # raqm
     pushd depends && ./install_raqm.sh && popd
 
+    # libavif
+    pushd depends && CMAKE_POLICY_VERSION_MINIMUM=3.5 ./install_libavif.sh && popd
+
     # extra test images
     pushd depends && ./install_extra_test_images.sh && popd
 else

.github/workflows/macos-install.sh

@@ -6,6 +6,8 @@ if [[ "$ImageOS" == "macos13" ]]; then
     brew uninstall gradle maven
 fi
 brew install \
+    aom \
+    dav1d \
     freetype \
     ghostscript \
     jpeg-turbo \
@@ -14,6 +16,8 @@ brew install \
     libtiff \
     little-cms2 \
     openjpeg \
+    rav1e \
+    svt-av1 \
     webp
 export PKG_CONFIG_PATH="/usr/local/opt/openblas/lib/pkgconfig"
 
@@ -27,5 +31,8 @@ python3 -m pip install -U pytest-timeout
 python3 -m pip install pyroma
 python3 -m pip install numpy
 
+# libavif
+pushd depends && ./install_libavif.sh && popd
+
 # extra test images
 pushd depends && ./install_extra_test_images.sh && popd

.github/workflows/test-mingw.yml

@@ -60,6 +60,7 @@ jobs:
               mingw-w64-x86_64-gcc \
               mingw-w64-x86_64-ghostscript \
               mingw-w64-x86_64-lcms2 \
+              mingw-w64-x86_64-libavif \
               mingw-w64-x86_64-libimagequant \
               mingw-w64-x86_64-libjpeg-turbo \
               mingw-w64-x86_64-libraqm \

.github/workflows/test-windows.yml

@@ -42,7 +42,7 @@ jobs:
             # Test the oldest Python on 32-bit
             - { python-version: "3.9", architecture: "x86", os: "windows-2019" }
 
-    timeout-minutes: 30
+    timeout-minutes: 45
 
     name: Python ${{ matrix.python-version }} (${{ matrix.architecture }})
 
@@ -145,6 +145,10 @@ jobs:
       if: steps.build-cache.outputs.cache-hit != 'true'
       run: "& winbuild\\build\\build_dep_libpng.cmd"
 
+    - name: Build dependencies / libavif
+      if: steps.build-cache.outputs.cache-hit != 'true' && matrix.architecture == 'x64'
+      run: "& winbuild\\build\\build_dep_libavif.cmd"
+
     # for FreeType WOFF2 font support
     - name: Build dependencies / brotli
       if: steps.build-cache.outputs.cache-hit != 'true'

.github/workflows/wheels-dependencies.sh

@@ -25,7 +25,7 @@ else
     MB_ML_LIBC=${AUDITWHEEL_POLICY::9}
     MB_ML_VER=${AUDITWHEEL_POLICY:9}
 fi
-PLAT=$CIBW_ARCHS
+PLAT="${CIBW_ARCHS:-$AUDITWHEEL_ARCH}"
 
 # Define custom utilities
 source wheels/multibuild/common_utils.sh
@@ -51,6 +51,7 @@ LIBWEBP_VERSION=1.5.0
 BZIP2_VERSION=1.0.8
 LIBXCB_VERSION=1.17.0
 BROTLI_VERSION=1.1.0
+LIBAVIF_VERSION=1.2.1
 
 if [[ $MB_ML_VER == 2014 ]]; then
     function build_xz {
@@ -116,6 +117,45 @@ function build_harfbuzz {
     touch harfbuzz-stamp
 }
 
+function build_libavif {
+    if [ -e libavif-stamp ]; then return; fi
+
+    python3 -m pip install meson ninja
+
+    if [[ "$PLAT" == "x86_64" ]] || [ -n "$SANITIZER" ]; then
+        build_simple nasm 2.16.03 https://www.nasm.us/pub/nasm/releasebuilds/2.16.03
+    fi
+
+    # For rav1e
+    curl https://sh.rustup.rs -sSf | sh -s -- -y
+    . "$HOME/.cargo/env"
+    if [ -z "$IS_ALPINE" ] && [ -z "$SANITIZER" ] && [ -z "$IS_MACOS" ]; then
+        yum install -y perl
+        if [[ "$MB_ML_VER" == 2014 ]]; then
+            yum install -y perl-IPC-Cmd
+        fi
+    fi
+
+    local out_dir=$(fetch_unpack https://github.com/AOMediaCodec/libavif/archive/refs/tags/v$LIBAVIF_VERSION.tar.gz libavif-$LIBAVIF_VERSION.tar.gz)
+    (cd $out_dir \
+        && CMAKE_POLICY_VERSION_MINIMUM=3.5 cmake \
+            -DCMAKE_INSTALL_PREFIX=$BUILD_PREFIX \
+            -DCMAKE_INSTALL_LIBDIR=$BUILD_PREFIX/lib \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=OFF \
+            -DAVIF_LIBSHARPYUV=LOCAL \
+            -DAVIF_LIBYUV=LOCAL \
+            -DAVIF_CODEC_AOM=LOCAL \
+            -DAVIF_CODEC_DAV1D=LOCAL \
+            -DAVIF_CODEC_RAV1E=LOCAL \
+            -DAVIF_CODEC_SVT=LOCAL \
+            -DENABLE_NASM=ON \
+            -DCMAKE_MODULE_PATH=/tmp/cmake/Modules \
+            . \
+        && make install)
+    touch libavif-stamp
+}
+
 function build {
     build_xz
     if [ -z "$IS_ALPINE" ] && [ -z "$SANITIZER" ] && [ -z "$IS_MACOS" ]; then
@@ -150,6 +190,7 @@ function build {
         build_tiff
     fi
 
+    build_libavif
     build_libpng
     build_lcms2
     build_openjpeg

.github/workflows/wheels.yml

@@ -160,6 +160,11 @@ jobs:
           & python.exe winbuild\build_prepare.py -v --no-imagequant --architecture=${{ matrix.cibw_arch }}
         shell: pwsh
 
+      - name: Update rust
+        if: matrix.cibw_arch == 'AMD64'
+        run: |
+          rustup update
+
       - name: Build wheels
         run: |
           setlocal EnableDelayedExpansion

Tests/check_wheel.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import platform
+import struct
 import sys
 
 from PIL import features
@@ -9,7 +10,7 @@ from .helper import is_pypy
 
 
 def test_wheel_modules() -> None:
-    expected_modules = {"pil", "tkinter", "freetype2", "littlecms2", "webp"}
+    expected_modules = {"pil", "tkinter", "freetype2", "littlecms2", "webp", "avif"}
 
     # tkinter is not available in cibuildwheel installed CPython on Windows
     try:
@@ -19,6 +20,11 @@ def test_wheel_modules() -> None:
     except ImportError:
         expected_modules.remove("tkinter")
 
+    # libavif is not available on Windows for x86 and ARM64 architectures
+    if sys.platform == "win32":
+        if platform.machine() == "ARM64" or struct.calcsize("P") == 4:
+            expected_modules.remove("avif")
+
     assert set(features.get_supported_modules()) == expected_modules
 
 

Tests/test_file_avif.py

@@ -0,0 +1,778 @@
+from __future__ import annotations
+
+import gc
+import os
+import re
+import warnings
+from collections.abc import Generator, Sequence
+from contextlib import contextmanager
+from io import BytesIO
+from pathlib import Path
+from typing import Any
+
+import pytest
+
+from PIL import (
+    AvifImagePlugin,
+    Image,
+    ImageDraw,
+    ImageFile,
+    UnidentifiedImageError,
+    features,
+)
+
+from .helper import (
+    PillowLeakTestCase,
+    assert_image,
+    assert_image_similar,
+    assert_image_similar_tofile,
+    hopper,
+    skip_unless_feature,
+)
+
+try:
+    from PIL import _avif
+
+    HAVE_AVIF = True
+except ImportError:
+    HAVE_AVIF = False
+
+
+TEST_AVIF_FILE = "Tests/images/avif/hopper.avif"
+
+
+def assert_xmp_orientation(xmp: bytes, expected: int) -> None:
+    assert int(xmp.split(b'tiff:Orientation="')[1].split(b'"')[0]) == expected
+
+
+def roundtrip(im: ImageFile.ImageFile, **options: Any) -> ImageFile.ImageFile:
+    out = BytesIO()
+    im.save(out, "AVIF", **options)
+    return Image.open(out)
+
+
+def skip_unless_avif_decoder(codec_name: str) -> pytest.MarkDecorator:
+    reason = f"{codec_name} decode not available"
+    return pytest.mark.skipif(
+        not HAVE_AVIF or not _avif.decoder_codec_available(codec_name), reason=reason
+    )
+
+
+def skip_unless_avif_encoder(codec_name: str) -> pytest.MarkDecorator:
+    reason = f"{codec_name} encode not available"
+    return pytest.mark.skipif(
+        not HAVE_AVIF or not _avif.encoder_codec_available(codec_name), reason=reason
+    )
+
+
+def is_docker_qemu() -> bool:
+    try:
+        init_proc_exe = os.readlink("/proc/1/exe")
+    except (FileNotFoundError, PermissionError):
+        return False
+    return "qemu" in init_proc_exe
+
+
+class TestUnsupportedAvif:
+    def test_unsupported(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        monkeypatch.setattr(AvifImagePlugin, "SUPPORTED", False)
+
+        with pytest.warns(UserWarning):
+            with pytest.raises(UnidentifiedImageError):
+                with Image.open(TEST_AVIF_FILE):
+                    pass
+
+    def test_unsupported_open(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        monkeypatch.setattr(AvifImagePlugin, "SUPPORTED", False)
+
+        with pytest.raises(SyntaxError):
+            AvifImagePlugin.AvifImageFile(TEST_AVIF_FILE)
+
+
+@skip_unless_feature("avif")
+class TestFileAvif:
+    def test_version(self) -> None:
+        version = features.version_module("avif")
+        assert version is not None
+        assert re.search(r"^\d+\.\d+\.\d+$", version)
+
+    def test_codec_version(self) -> None:
+        assert AvifImagePlugin.get_codec_version("unknown") is None
+
+        for codec_name in ("aom", "dav1d", "rav1e", "svt"):
+            codec_version = AvifImagePlugin.get_codec_version(codec_name)
+            if _avif.decoder_codec_available(
+                codec_name
+            ) or _avif.encoder_codec_available(codec_name):
+                assert codec_version is not None
+                assert re.search(r"^v?\d+\.\d+\.\d+(-([a-z\d])+)*$", codec_version)
+            else:
+                assert codec_version is None
+
+    def test_read(self) -> None:
+        """
+        Can we read an AVIF file without error?
+        Does it have the bits we expect?
+        """
+
+        with Image.open(TEST_AVIF_FILE) as image:
+            assert image.mode == "RGB"
+            assert image.size == (128, 128)
+            assert image.format == "AVIF"
+            assert image.get_format_mimetype() == "image/avif"
+            image.getdata()
+
+            # generated with:
+            # avifdec hopper.avif hopper_avif_write.png
+            assert_image_similar_tofile(
+                image, "Tests/images/avif/hopper_avif_write.png", 11.5
+            )
+
+    def test_write_rgb(self, tmp_path: Path) -> None:
+        """
+        Can we write a RGB mode file to avif without error?
+        Does it have the bits we expect?
+        """
+
+        temp_file = tmp_path / "temp.avif"
+
+        im = hopper()
+        im.save(temp_file)
+        with Image.open(temp_file) as reloaded:
+            assert reloaded.mode == "RGB"
+            assert reloaded.size == (128, 128)
+            assert reloaded.format == "AVIF"
+            reloaded.getdata()
+
+            # avifdec hopper.avif avif/hopper_avif_write.png
+            assert_image_similar_tofile(
+                reloaded, "Tests/images/avif/hopper_avif_write.png", 6.02
+            )
+
+            # This test asserts that the images are similar. If the average pixel
+            # difference between the two images is less than the epsilon value,
+            # then we're going to accept that it's a reasonable lossy version of
+            # the image.
+            assert_image_similar(reloaded, im, 8.62)
+
+    def test_AvifEncoder_with_invalid_args(self) -> None:
+        """
+        Calling encoder functions with no arguments should result in an error.
+        """
+        with pytest.raises(TypeError):
+            _avif.AvifEncoder()
+
+    def test_AvifDecoder_with_invalid_args(self) -> None:
+        """
+        Calling decoder functions with no arguments should result in an error.
+        """
+        with pytest.raises(TypeError):
+            _avif.AvifDecoder()
+
+    def test_invalid_dimensions(self, tmp_path: Path) -> None:
+        test_file = tmp_path / "temp.avif"
+        im = Image.new("RGB", (0, 0))
+        with pytest.raises(ValueError):
+            im.save(test_file)
+
+    def test_encoder_finish_none_error(
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+    ) -> None:
+        """Save should raise an OSError if AvifEncoder.finish returns None"""
+
+        class _mock_avif:
+            class AvifEncoder:
+                def __init__(self, *args: Any) -> None:
+                    pass
+
+                def add(self, *args: Any) -> None:
+                    pass
+
+                def finish(self) -> None:
+                    return None
+
+        monkeypatch.setattr(AvifImagePlugin, "_avif", _mock_avif)
+
+        im = Image.new("RGB", (150, 150))
+        test_file = tmp_path / "temp.avif"
+        with pytest.raises(OSError):
+            im.save(test_file)
+
+    def test_no_resource_warning(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            with warnings.catch_warnings():
+                warnings.simplefilter("error")
+
+                im.save(tmp_path / "temp.avif")
+
+    @pytest.mark.parametrize("major_brand", [b"avif", b"avis", b"mif1", b"msf1"])
+    def test_accept_ftyp_brands(self, major_brand: bytes) -> None:
+        data = b"\x00\x00\x00\x1cftyp%s\x00\x00\x00\x00" % major_brand
+        assert AvifImagePlugin._accept(data) is True
+
+    def test_file_pointer_could_be_reused(self) -> None:
+        with open(TEST_AVIF_FILE, "rb") as blob:
+            with Image.open(blob) as im:
+                im.load()
+            with Image.open(blob) as im:
+                im.load()
+
+    def test_background_from_gif(self, tmp_path: Path) -> None:
+        with Image.open("Tests/images/chi.gif") as im:
+            original_value = im.convert("RGB").getpixel((1, 1))
+
+            # Save as AVIF
+            out_avif = tmp_path / "temp.avif"
+            im.save(out_avif, save_all=True)
+
+        # Save as GIF
+        out_gif = tmp_path / "temp.gif"
+        with Image.open(out_avif) as im:
+            im.save(out_gif)
+
+        with Image.open(out_gif) as reread:
+            reread_value = reread.convert("RGB").getpixel((1, 1))
+        difference = sum([abs(original_value[i] - reread_value[i]) for i in range(3)])
+        assert difference <= 3
+
+    def test_save_single_frame(self, tmp_path: Path) -> None:
+        temp_file = tmp_path / "temp.avif"
+        with Image.open("Tests/images/chi.gif") as im:
+            im.save(temp_file)
+        with Image.open(temp_file) as im:
+            assert im.n_frames == 1
+
+    def test_invalid_file(self) -> None:
+        invalid_file = "Tests/images/flower.jpg"
+
+        with pytest.raises(SyntaxError):
+            AvifImagePlugin.AvifImageFile(invalid_file)
+
+    def test_load_transparent_rgb(self) -> None:
+        test_file = "Tests/images/avif/transparency.avif"
+        with Image.open(test_file) as im:
+            assert_image(im, "RGBA", (64, 64))
+
+            # image has 876 transparent pixels
+            assert im.getchannel("A").getcolors()[0] == (876, 0)
+
+    def test_save_transparent(self, tmp_path: Path) -> None:
+        im = Image.new("RGBA", (10, 10), (0, 0, 0, 0))
+        assert im.getcolors() == [(100, (0, 0, 0, 0))]
+
+        test_file = tmp_path / "temp.avif"
+        im.save(test_file)
+
+        # check if saved image contains the same transparency
+        with Image.open(test_file) as im:
+            assert_image(im, "RGBA", (10, 10))
+            assert im.getcolors() == [(100, (0, 0, 0, 0))]
+
+    def test_save_icc_profile(self) -> None:
+        with Image.open("Tests/images/avif/icc_profile_none.avif") as im:
+            assert "icc_profile" not in im.info
+
+            with Image.open("Tests/images/avif/icc_profile.avif") as with_icc:
+                expected_icc = with_icc.info["icc_profile"]
+                assert expected_icc is not None
+
+                im = roundtrip(im, icc_profile=expected_icc)
+                assert im.info["icc_profile"] == expected_icc
+
+    def test_discard_icc_profile(self) -> None:
+        with Image.open("Tests/images/avif/icc_profile.avif") as im:
+            im = roundtrip(im, icc_profile=None)
+        assert "icc_profile" not in im.info
+
+    def test_roundtrip_icc_profile(self) -> None:
+        with Image.open("Tests/images/avif/icc_profile.avif") as im:
+            expected_icc = im.info["icc_profile"]
+
+            im = roundtrip(im)
+        assert im.info["icc_profile"] == expected_icc
+
+    def test_roundtrip_no_icc_profile(self) -> None:
+        with Image.open("Tests/images/avif/icc_profile_none.avif") as im:
+            assert "icc_profile" not in im.info
+
+            im = roundtrip(im)
+        assert "icc_profile" not in im.info
+
+    def test_exif(self) -> None:
+        # With an EXIF chunk
+        with Image.open("Tests/images/avif/exif.avif") as im:
+            exif = im.getexif()
+        assert exif[274] == 1
+
+        with Image.open("Tests/images/avif/xmp_tags_orientation.avif") as im:
+            exif = im.getexif()
+        assert exif[274] == 3
+
+    @pytest.mark.parametrize("use_bytes", [True, False])
+    @pytest.mark.parametrize("orientation", [1, 2])
+    def test_exif_save(
+        self,
+        tmp_path: Path,
+        use_bytes: bool,
+        orientation: int,
+    ) -> None:
+        exif = Image.Exif()
+        exif[274] = orientation
+        exif_data = exif.tobytes()
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            im.save(test_file, exif=exif_data if use_bytes else exif)
+
+        with Image.open(test_file) as reloaded:
+            if orientation == 1:
+                assert "exif" not in reloaded.info
+            else:
+                assert reloaded.info["exif"] == exif_data
+
+    def test_exif_without_orientation(self, tmp_path: Path) -> None:
+        exif = Image.Exif()
+        exif[272] = b"test"
+        exif_data = exif.tobytes()
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            im.save(test_file, exif=exif)
+
+        with Image.open(test_file) as reloaded:
+            assert reloaded.info["exif"] == exif_data
+
+    def test_exif_invalid(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            with pytest.raises(SyntaxError):
+                im.save(test_file, exif=b"invalid")
+
+    @pytest.mark.parametrize(
+        "rot, mir, exif_orientation",
+        [
+            (0, 0, 4),
+            (0, 1, 2),
+            (1, 0, 5),
+            (1, 1, 7),
+            (2, 0, 2),
+            (2, 1, 4),
+            (3, 0, 7),
+            (3, 1, 5),
+        ],
+    )
+    def test_rot_mir_exif(
+        self, rot: int, mir: int, exif_orientation: int, tmp_path: Path
+    ) -> None:
+        with Image.open(f"Tests/images/avif/rot{rot}mir{mir}.avif") as im:
+            exif = im.getexif()
+            assert exif[274] == exif_orientation
+
+            test_file = tmp_path / "temp.avif"
+            im.save(test_file, exif=exif)
+        with Image.open(test_file) as reloaded:
+            assert reloaded.getexif()[274] == exif_orientation
+
+    def test_xmp(self) -> None:
+        with Image.open("Tests/images/avif/xmp_tags_orientation.avif") as im:
+            xmp = im.info["xmp"]
+        assert_xmp_orientation(xmp, 3)
+
+    def test_xmp_save(self, tmp_path: Path) -> None:
+        xmp_arg = "\n".join(
+            [
+                '<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>',
+                '<x:xmpmeta xmlns:x="adobe:ns:meta/">',
+                ' <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">',
+                '  <rdf:Description rdf:about=""',
+                '    xmlns:tiff="http://ns.adobe.com/tiff/1.0/"',
+                '   tiff:Orientation="1"/>',
+                " </rdf:RDF>",
+                "</x:xmpmeta>",
+                '<?xpacket end="r"?>',
+            ]
+        )
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            im.save(test_file, xmp=xmp_arg)
+
+        with Image.open(test_file) as reloaded:
+            xmp = reloaded.info["xmp"]
+        assert_xmp_orientation(xmp, 1)
+
+    def test_tell(self) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            assert im.tell() == 0
+
+    def test_seek(self) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            im.seek(0)
+
+            with pytest.raises(EOFError):
+                im.seek(1)
+
+    @pytest.mark.parametrize("subsampling", ["4:4:4", "4:2:2", "4:2:0", "4:0:0"])
+    def test_encoder_subsampling(self, tmp_path: Path, subsampling: str) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            im.save(test_file, subsampling=subsampling)
+
+    def test_encoder_subsampling_invalid(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            with pytest.raises(ValueError):
+                im.save(test_file, subsampling="foo")
+
+    @pytest.mark.parametrize("value", ["full", "limited"])
+    def test_encoder_range(self, tmp_path: Path, value: str) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            im.save(test_file, range=value)
+
+    def test_encoder_range_invalid(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            with pytest.raises(ValueError):
+                im.save(test_file, range="foo")
+
+    @skip_unless_avif_encoder("aom")
+    def test_encoder_codec_param(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            im.save(test_file, codec="aom")
+
+    def test_encoder_codec_invalid(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            with pytest.raises(ValueError):
+                im.save(test_file, codec="foo")
+
+    @skip_unless_avif_decoder("dav1d")
+    def test_decoder_codec_cannot_encode(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            with pytest.raises(ValueError):
+                im.save(test_file, codec="dav1d")
+
+    @skip_unless_avif_encoder("aom")
+    @pytest.mark.parametrize(
+        "advanced",
+        [
+            {
+                "aq-mode": "1",
+                "enable-chroma-deltaq": "1",
+            },
+            (("aq-mode", "1"), ("enable-chroma-deltaq", "1")),
+            [("aq-mode", "1"), ("enable-chroma-deltaq", "1")],
+        ],
+    )
+    def test_encoder_advanced_codec_options(
+        self, advanced: dict[str, str] | Sequence[tuple[str, str]]
+    ) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            ctrl_buf = BytesIO()
+            im.save(ctrl_buf, "AVIF", codec="aom")
+            test_buf = BytesIO()
+            im.save(
+                test_buf,
+                "AVIF",
+                codec="aom",
+                advanced=advanced,
+            )
+            assert ctrl_buf.getvalue() != test_buf.getvalue()
+
+    @skip_unless_avif_encoder("aom")
+    @pytest.mark.parametrize("advanced", [{"foo": "bar"}, {"foo": 1234}, 1234])
+    def test_encoder_advanced_codec_options_invalid(
+        self, tmp_path: Path, advanced: dict[str, str] | int
+    ) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            with pytest.raises(ValueError):
+                im.save(test_file, codec="aom", advanced=advanced)
+
+    @skip_unless_avif_decoder("aom")
+    def test_decoder_codec_param(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        monkeypatch.setattr(AvifImagePlugin, "DECODE_CODEC_CHOICE", "aom")
+
+        with Image.open(TEST_AVIF_FILE) as im:
+            assert im.size == (128, 128)
+
+    @skip_unless_avif_encoder("rav1e")
+    def test_encoder_codec_cannot_decode(
+        self, monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+    ) -> None:
+        monkeypatch.setattr(AvifImagePlugin, "DECODE_CODEC_CHOICE", "rav1e")
+
+        with pytest.raises(ValueError):
+            with Image.open(TEST_AVIF_FILE):
+                pass
+
+    def test_decoder_codec_invalid(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        monkeypatch.setattr(AvifImagePlugin, "DECODE_CODEC_CHOICE", "foo")
+
+        with pytest.raises(ValueError):
+            with Image.open(TEST_AVIF_FILE):
+                pass
+
+    @skip_unless_avif_encoder("aom")
+    def test_encoder_codec_available(self) -> None:
+        assert _avif.encoder_codec_available("aom") is True
+
+    def test_encoder_codec_available_bad_params(self) -> None:
+        with pytest.raises(TypeError):
+            _avif.encoder_codec_available()
+
+    @skip_unless_avif_decoder("dav1d")
+    def test_encoder_codec_available_cannot_decode(self) -> None:
+        assert _avif.encoder_codec_available("dav1d") is False
+
+    def test_encoder_codec_available_invalid(self) -> None:
+        assert _avif.encoder_codec_available("foo") is False
+
+    def test_encoder_quality_valueerror(self, tmp_path: Path) -> None:
+        with Image.open(TEST_AVIF_FILE) as im:
+            test_file = tmp_path / "temp.avif"
+            with pytest.raises(ValueError):
+                im.save(test_file, quality="invalid")
+
+    @skip_unless_avif_decoder("aom")
+    def test_decoder_codec_available(self) -> None:
+        assert _avif.decoder_codec_available("aom") is True
+
+    def test_decoder_codec_available_bad_params(self) -> None:
+        with pytest.raises(TypeError):
+            _avif.decoder_codec_available()
+
+    @skip_unless_avif_encoder("rav1e")
+    def test_decoder_codec_available_cannot_decode(self) -> None:
+        assert _avif.decoder_codec_available("rav1e") is False
+
+    def test_decoder_codec_available_invalid(self) -> None:
+        assert _avif.decoder_codec_available("foo") is False
+
+    def test_p_mode_transparency(self, tmp_path: Path) -> None:
+        im = Image.new("P", size=(64, 64))
+        draw = ImageDraw.Draw(im)
+        draw.rectangle(xy=[(0, 0), (32, 32)], fill=255)
+        draw.rectangle(xy=[(32, 32), (64, 64)], fill=255)
+
+        out_png = tmp_path / "temp.png"
+        im.save(out_png, transparency=0)
+        with Image.open(out_png) as im_png:
+            out_avif = tmp_path / "temp.avif"
+            im_png.save(out_avif, quality=100)
+
+            with Image.open(out_avif) as expected:
+                assert_image_similar(im_png.convert("RGBA"), expected, 0.17)
+
+    def test_decoder_strict_flags(self) -> None:
+        # This would fail if full avif strictFlags were enabled
+        with Image.open("Tests/images/avif/hopper-missing-pixi.avif") as im:
+            assert im.size == (128, 128)
+
+    @skip_unless_avif_encoder("aom")
+    @pytest.mark.parametrize("speed", [-1, 1, 11])
+    def test_aom_optimizations(self, tmp_path: Path, speed: int) -> None:
+        test_file = tmp_path / "temp.avif"
+        hopper().save(test_file, codec="aom", speed=speed)
+
+    @skip_unless_avif_encoder("svt")
+    def test_svt_optimizations(self, tmp_path: Path) -> None:
+        test_file = tmp_path / "temp.avif"
+        hopper().save(test_file, codec="svt", speed=1)
+
+
+@skip_unless_feature("avif")
+class TestAvifAnimation:
+    @contextmanager
+    def star_frames(self) -> Generator[list[Image.Image], None, None]:
+        with Image.open("Tests/images/avif/star.png") as f:
+            yield [f, f.rotate(90), f.rotate(180), f.rotate(270)]
+
+    def test_n_frames(self) -> None:
+        """
+        Ensure that AVIF format sets n_frames and is_animated attributes
+        correctly.
+        """
+
+        with Image.open(TEST_AVIF_FILE) as im:
+            assert im.n_frames == 1
+            assert not im.is_animated
+
+        with Image.open("Tests/images/avif/star.avifs") as im:
+            assert im.n_frames == 5
+            assert im.is_animated
+
+    def test_write_animation_P(self, tmp_path: Path) -> None:
+        """
+        Convert an animated GIF to animated AVIF, then compare the frame
+        count, and ensure the frames are visually similar to the originals.
+        """
+
+        with Image.open("Tests/images/avif/star.gif") as original:
+            assert original.n_frames > 1
+
+            temp_file = tmp_path / "temp.avif"
+            original.save(temp_file, save_all=True)
+            with Image.open(temp_file) as im:
+                assert im.n_frames == original.n_frames
+
+                # Compare first frame in P mode to frame from original GIF
+                assert_image_similar(im, original.convert("RGBA"), 2)
+
+                # Compare later frames in RGBA mode to frames from original GIF
+                for frame in range(1, original.n_frames):
+                    original.seek(frame)
+                    im.seek(frame)
+                    assert_image_similar(im, original, 2.54)
+
+    def test_write_animation_RGBA(self, tmp_path: Path) -> None:
+        """
+        Write an animated AVIF from RGBA frames, and ensure the frames
+        are visually similar to the originals.
+        """
+
+        def check(temp_file: Path) -> None:
+            with Image.open(temp_file) as im:
+                assert im.n_frames == 4
+
+                # Compare first frame to original
+                assert_image_similar(im, frame1, 2.7)
+
+                # Compare second frame to original
+                im.seek(1)
+                assert_image_similar(im, frame2, 4.1)
+
+        with self.star_frames() as frames:
+            frame1 = frames[0]
+            frame2 = frames[1]
+            temp_file1 = tmp_path / "temp.avif"
+            frames[0].copy().save(temp_file1, save_all=True, append_images=frames[1:])
+            check(temp_file1)
+
+            # Test appending using a generator
+            def imGenerator(
+                ims: list[Image.Image],
+            ) -> Generator[Image.Image, None, None]:
+                yield from ims
+
+            temp_file2 = tmp_path / "temp_generator.avif"
+            frames[0].copy().save(
+                temp_file2,
+                save_all=True,
+                append_images=imGenerator(frames[1:]),
+            )
+            check(temp_file2)
+
+    def test_sequence_dimension_mismatch_check(self, tmp_path: Path) -> None:
+        temp_file = tmp_path / "temp.avif"
+        frame1 = Image.new("RGB", (100, 100))
+        frame2 = Image.new("RGB", (150, 150))
+        with pytest.raises(ValueError):
+            frame1.save(temp_file, save_all=True, append_images=[frame2])
+
+    def test_heif_raises_unidentified_image_error(self) -> None:
+        with pytest.raises(UnidentifiedImageError):
+            with Image.open("Tests/images/avif/hopper.heif"):
+                pass
+
+    @pytest.mark.parametrize("alpha_premultiplied", [False, True])
+    def test_alpha_premultiplied(
+        self, tmp_path: Path, alpha_premultiplied: bool
+    ) -> None:
+        temp_file = tmp_path / "temp.avif"
+        color = (200, 200, 200, 1)
+        im = Image.new("RGBA", (1, 1), color)
+        im.save(temp_file, alpha_premultiplied=alpha_premultiplied)
+
+        expected = (255, 255, 255, 1) if alpha_premultiplied else color
+        with Image.open(temp_file) as reloaded:
+            assert reloaded.getpixel((0, 0)) == expected
+
+    def test_timestamp_and_duration(self, tmp_path: Path) -> None:
+        """
+        Try passing a list of durations, and make sure the encoded
+        timestamps and durations are correct.
+        """
+
+        durations = [1, 10, 20, 30, 40]
+        temp_file = tmp_path / "temp.avif"
+        with self.star_frames() as frames:
+            frames[0].save(
+                temp_file,
+                save_all=True,
+                append_images=(frames[1:] + [frames[0]]),
+                duration=durations,
+            )
+
+        with Image.open(temp_file) as im:
+            assert im.n_frames == 5
+            assert im.is_animated
+
+            # Check that timestamps and durations match original values specified
+            timestamp = 0
+            for frame in range(im.n_frames):
+                im.seek(frame)
+                im.load()
+                assert im.info["duration"] == durations[frame]
+                assert im.info["timestamp"] == timestamp
+                timestamp += durations[frame]
+
+    def test_seeking(self, tmp_path: Path) -> None:
+        """
+        Create an animated AVIF file, and then try seeking through frames in
+        reverse-order, verifying the timestamps and durations are correct.
+        """
+
+        duration = 33
+        temp_file = tmp_path / "temp.avif"
+        with self.star_frames() as frames:
+            frames[0].save(
+                temp_file,
+                save_all=True,
+                append_images=(frames[1:] + [frames[0]]),
+                duration=duration,
+            )
+
+        with Image.open(temp_file) as im:
+            assert im.n_frames == 5
+            assert im.is_animated
+
+            # Traverse frames in reverse, checking timestamps and durations
+            timestamp = duration * (im.n_frames - 1)
+            for frame in reversed(range(im.n_frames)):
+                im.seek(frame)
+                im.load()
+                assert im.info["duration"] == duration
+                assert im.info["timestamp"] == timestamp
+                timestamp -= duration
+
+    def test_seek_errors(self) -> None:
+        with Image.open("Tests/images/avif/star.avifs") as im:
+            with pytest.raises(EOFError):
+                im.seek(-1)
+
+            with pytest.raises(EOFError):
+                im.seek(42)
+
+
+MAX_THREADS = os.cpu_count() or 1
+
+
+@skip_unless_feature("avif")
+class TestAvifLeaks(PillowLeakTestCase):
+    mem_limit = MAX_THREADS * 3 * 1024
+    iterations = 100
+
+    @pytest.mark.skipif(
+        is_docker_qemu(), reason="Skipping on cross-architecture containers"
+    )
+    def test_leak_load(self) -> None:
+        with open(TEST_AVIF_FILE, "rb") as f:
+            im_data = f.read()
+
+        def core() -> None:
+            with Image.open(BytesIO(im_data)) as im:
+                im.load()
+            gc.collect()
+
+        self._test_leak(core)

depends/install_libavif.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+version=1.2.1
+
+./download-and-extract.sh libavif-$version https://github.com/AOMediaCodec/libavif/archive/refs/tags/v$version.tar.gz
+
+pushd libavif-$version
+
+if [ $(uname) == "Darwin" ] && [ -x "$(command -v brew)" ]; then
+    PREFIX=$(brew --prefix)
+else
+    PREFIX=/usr
+fi
+
+PKGCONFIG=${PKGCONFIG:-pkg-config}
+
+LIBAVIF_CMAKE_FLAGS=()
+HAS_DECODER=0
+HAS_ENCODER=0
+
+if $PKGCONFIG --exists aom; then
+    LIBAVIF_CMAKE_FLAGS+=(-DAVIF_CODEC_AOM=SYSTEM)
+    HAS_ENCODER=1
+    HAS_DECODER=1
+fi
+
+if $PKGCONFIG --exists dav1d; then
+    LIBAVIF_CMAKE_FLAGS+=(-DAVIF_CODEC_DAV1D=SYSTEM)
+    HAS_DECODER=1
+fi
+
+if $PKGCONFIG --exists libgav1; then
+    LIBAVIF_CMAKE_FLAGS+=(-DAVIF_CODEC_LIBGAV1=SYSTEM)
+    HAS_DECODER=1
+fi
+
+if $PKGCONFIG --exists rav1e; then
+    LIBAVIF_CMAKE_FLAGS+=(-DAVIF_CODEC_RAV1E=SYSTEM)
+    HAS_ENCODER=1
+fi
+
+if $PKGCONFIG --exists SvtAv1Enc; then
+    LIBAVIF_CMAKE_FLAGS+=(-DAVIF_CODEC_SVT=SYSTEM)
+    HAS_ENCODER=1
+fi
+
+if [ "$HAS_ENCODER" != 1 ] || [ "$HAS_DECODER" != 1 ]; then
+    LIBAVIF_CMAKE_FLAGS+=(-DAVIF_CODEC_AOM=LOCAL)
+fi
+
+cmake \
+    -DCMAKE_INSTALL_PREFIX=$PREFIX \
+    -DCMAKE_INSTALL_NAME_DIR=$PREFIX/lib \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_MACOSX_RPATH=OFF \
+    -DAVIF_LIBSHARPYUV=LOCAL \
+    -DAVIF_LIBYUV=LOCAL \
+    "${LIBAVIF_CMAKE_FLAGS[@]}" \
+    .
+
+sudo make install
+
+popd

docs/handbook/image-file-formats.rst

@@ -24,6 +24,83 @@ present, and the :py:attr:`~PIL.Image.Image.format` attribute will be ``None``.
 Fully supported formats
 -----------------------
 
+AVIF
+^^^^
+
+Pillow reads and writes AVIF files, including AVIF sequence images.
+It is only possible to save 8-bit AVIF images, and all AVIF images are decoded
+as 8-bit RGB(A).
+
+The :py:meth:`~PIL.Image.Image.save` method supports the following options:
+
+**quality**
+    Integer, 0-100, defaults to 75. 0 gives the smallest size and poorest
+    quality, 100 the largest size and best quality.
+
+**subsampling**
+    If present, sets the subsampling for the encoder. Defaults to ``4:2:0``.
+    Options include:
+
+    * ``4:0:0``
+    * ``4:2:0``
+    * ``4:2:2``
+    * ``4:4:4``
+
+**speed**
+    Quality/speed trade-off (0=slower/better, 10=fastest). Defaults to 6.
+
+**max_threads**
+    Limit the number of active threads used. By default, there is no limit. If the aom
+    codec is used, there is a maximum of 64.
+
+**range**
+    YUV range, either "full" or "limited". Defaults to "full".
+
+**codec**
+    AV1 codec to use for encoding. Specific values are "aom", "rav1e", and
+    "svt", presuming the chosen codec is available. Defaults to "auto", which
+    will choose the first available codec in the order of the preceding list.
+
+**tile_rows** / **tile_cols**
+    For tile encoding, the (log 2) number of tile rows and columns to use.
+    Valid values are 0-6, default 0. Ignored if "autotiling" is set to true.
+
+**autotiling**
+    Split the image up to allow parallelization. Enabled automatically if "tile_rows"
+    and "tile_cols" both have their default values of zero.
+
+**alpha_premultiplied**
+    Encode the image with premultiplied alpha. Defaults to ``False``.
+
+**advanced**
+    Codec specific options.
+
+**icc_profile**
+    The ICC Profile to include in the saved file.
+
+**exif**
+    The exif data to include in the saved file.
+
+**xmp**
+    The XMP data to include in the saved file.
+
+Saving sequences
+~~~~~~~~~~~~~~~~
+
+When calling :py:meth:`~PIL.Image.Image.save` to write an AVIF file, by default
+only the first frame of a multiframe image will be saved. If the ``save_all``
+argument is present and true, then all frames will be saved, and the following
+options will also be available.
+
+**append_images**
+    A list of images to append as additional frames. Each of the
+    images in the list can be single or multiframe images.
+
+**duration**
+    The display duration of each frame, in milliseconds. Pass a single
+    integer for a constant duration, or a list or tuple to set the
+    duration for each frame separately.
+
 BLP
 ^^^
 
@@ -242,7 +319,7 @@ following options are available::
 **append_images**
     A list of images to append as additional frames. Each of the
     images in the list can be single or multiframe images.
-    This is currently supported for GIF, PDF, PNG, TIFF, and WebP.
+    This is supported for AVIF, GIF, PDF, PNG, TIFF and WebP.
 
     It is also supported for ICO and ICNS. If images are passed in of relevant
     sizes, they will be used instead of scaling down the main image.

docs/installation/building-from-source.rst

@@ -89,6 +89,14 @@ Many of Pillow's features require external libraries:
 
 * **libxcb** provides X11 screengrab support.
 
+* **libavif** provides support for the AVIF format.
+
+  * Pillow requires libavif version **1.0.0** or greater.
+  * libavif is merely an API that wraps AVIF codecs. If you are compiling
+    libavif from source, you will also need to install both an AVIF encoder
+    and decoder, such as rav1e and dav1d, or libaom, which both encodes and
+    decodes AVIF images.
+
 .. tab:: Linux
 
     If you didn't build Python from source, make sure you have Python's
@@ -117,6 +125,12 @@ Many of Pillow's features require external libraries:
     To install libraqm, ``sudo apt-get install meson`` and then see
     ``depends/install_raqm.sh``.
 
+    Build prerequisites for libavif on Ubuntu are installed with::
+
+        sudo apt-get install cmake ninja-build nasm
+
+    Then see ``depends/install_libavif.sh`` to build and install libavif.
+
     Prerequisites are installed on recent **Red Hat**, **CentOS** or **Fedora** with::
 
         sudo dnf install libtiff-devel libjpeg-devel openjpeg2-devel zlib-devel \
@@ -148,7 +162,15 @@ Many of Pillow's features require external libraries:
     The easiest way to install external libraries is via `Homebrew
     <https://brew.sh/>`_. After you install Homebrew, run::
 
-        brew install libjpeg libraqm libtiff little-cms2 openjpeg webp
+        brew install libavif libjpeg libraqm libtiff little-cms2 openjpeg webp
+
+    If you would like to use libavif with more codecs than just aom, then
+    instead of installing libavif through Homebrew directly, you can use
+    Homebrew to install libavif's build dependencies::
+
+        brew install aom dav1d rav1e svt-av1
+
+    Then see ``depends/install_libavif.sh`` to install libavif.
 
 .. tab:: Windows
 
@@ -187,7 +209,8 @@ Many of Pillow's features require external libraries:
             mingw-w64-x86_64-libwebp \
             mingw-w64-x86_64-openjpeg2 \
             mingw-w64-x86_64-libimagequant \
-            mingw-w64-x86_64-libraqm
+            mingw-w64-x86_64-libraqm \
+            mingw-w64-x86_64-libavif
 
 .. tab:: FreeBSD
 
@@ -199,7 +222,7 @@ Many of Pillow's features require external libraries:
 
     Prerequisites are installed on **FreeBSD 10 or 11** with::
 
-        sudo pkg install jpeg-turbo tiff webp lcms2 freetype2 openjpeg harfbuzz fribidi libxcb
+        sudo pkg install jpeg-turbo tiff webp lcms2 freetype2 openjpeg harfbuzz fribidi libxcb libavif
 
     Then see ``depends/install_raqm_cmake.sh`` to install libraqm.
 

docs/reference/features.rst

@@ -21,6 +21,7 @@ Support for the following modules can be checked:
 * ``freetype2``: FreeType font support via :py:func:`PIL.ImageFont.truetype`.
 * ``littlecms2``: LittleCMS 2 support via :py:mod:`PIL.ImageCms`.
 * ``webp``: WebP image support.
+* ``avif``: AVIF image support.
 
 .. autofunction:: PIL.features.check_module
 .. autofunction:: PIL.features.version_module

docs/reference/plugins.rst

@@ -1,6 +1,14 @@
 Plugin reference
 ================
 
+:mod:`~PIL.AvifImagePlugin` Module
+----------------------------------
+
+.. automodule:: PIL.AvifImagePlugin
+    :members:
+    :undoc-members:
+    :show-inheritance:
+
 :mod:`~PIL.BmpImagePlugin` Module
 ---------------------------------
 

docs/releasenotes/11.2.0.rst

@@ -68,3 +68,12 @@ Compressed DDS images can now be saved using a ``pixel_format`` argument. DXT1,
 DXT5, BC2, BC3 and BC5 are supported::
 
     im.save("out.dds", pixel_format="DXT1")
+
+Other Changes
+=============
+
+Reading and writing AVIF images
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Pillow can now read and write AVIF images. If you are building Pillow from source, this
+will require libavif 1.0.0 or later.

setup.py

@@ -32,6 +32,7 @@ configuration: dict[str, list[str]] = {}
 
 
 PILLOW_VERSION = get_version()
+AVIF_ROOT = None
 FREETYPE_ROOT = None
 HARFBUZZ_ROOT = None
 FRIBIDI_ROOT = None
@@ -306,6 +307,7 @@ class pil_build_ext(build_ext):
             "jpeg2000",
             "imagequant",
             "xcb",
+            "avif",
         ]
 
         required = {"jpeg", "zlib"}
@@ -481,6 +483,7 @@ class pil_build_ext(build_ext):
         #
         # add configured kits
         for root_name, lib_name in {
+            "AVIF_ROOT": "avif",
             "JPEG_ROOT": "libjpeg",
             "JPEG2K_ROOT": "libopenjp2",
             "TIFF_ROOT": ("libtiff-5", "libtiff-4"),
@@ -846,6 +849,12 @@ class pil_build_ext(build_ext):
                 if _find_library_file(self, "xcb"):
                     feature.set("xcb", "xcb")
 
+        if feature.want("avif"):
+            _dbg("Looking for avif")
+            if _find_include_file(self, "avif/avif.h"):
+                if _find_library_file(self, "avif"):
+                    feature.set("avif", "avif")
+
         for f in feature:
             if not feature.get(f) and feature.require(f):
                 if f in ("jpeg", "zlib"):
@@ -934,6 +943,14 @@ class pil_build_ext(build_ext):
         else:
             self._remove_extension("PIL._webp")
 
+        if feature.get("avif"):
+            libs = [feature.get("avif")]
+            if sys.platform == "win32":
+                libs.extend(["ntdll", "userenv", "ws2_32", "bcrypt"])
+            self._update_extension("PIL._avif", libs)
+        else:
+            self._remove_extension("PIL._avif")
+
         tk_libs = ["psapi"] if sys.platform in ("win32", "cygwin") else []
         self._update_extension("PIL._imagingtk", tk_libs)
 
@@ -976,6 +993,7 @@ class pil_build_ext(build_ext):
             (feature.get("lcms"), "LITTLECMS2"),
             (feature.get("webp"), "WEBP"),
             (feature.get("xcb"), "XCB (X protocol)"),
+            (feature.get("avif"), "LIBAVIF"),
         ]
 
         all = 1
@@ -1018,6 +1036,7 @@ ext_modules = [
     Extension("PIL._imagingft", ["src/_imagingft.c"]),
     Extension("PIL._imagingcms", ["src/_imagingcms.c"]),
     Extension("PIL._webp", ["src/_webp.c"]),
+    Extension("PIL._avif", ["src/_avif.c"]),
     Extension("PIL._imagingtk", ["src/_imagingtk.c", "src/Tk/tkImaging.c"]),
     Extension("PIL._imagingmath", ["src/_imagingmath.c"]),
     Extension("PIL._imagingmorph", ["src/_imagingmorph.c"]),

src/PIL/AvifImagePlugin.py

@@ -0,0 +1,292 @@
+from __future__ import annotations
+
+import os
+from io import BytesIO
+from typing import IO
+
+from . import ExifTags, Image, ImageFile
+
+try:
+    from . import _avif
+
+    SUPPORTED = True
+except ImportError:
+    SUPPORTED = False
+
+# Decoder options as module globals, until there is a way to pass parameters
+# to Image.open (see https://github.com/python-pillow/Pillow/issues/569)
+DECODE_CODEC_CHOICE = "auto"
+# Decoding is only affected by this for libavif **0.8.4** or greater.
+DEFAULT_MAX_THREADS = 0
+
+
+def get_codec_version(codec_name: str) -> str | None:
+    versions = _avif.codec_versions()
+    for version in versions.split(", "):
+        if version.split(" [")[0] == codec_name:
+            return version.split(":")[-1].split(" ")[0]
+    return None
+
+
+def _accept(prefix: bytes) -> bool | str:
+    if prefix[4:8] != b"ftyp":
+        return False
+    major_brand = prefix[8:12]
+    if major_brand in (
+        # coding brands
+        b"avif",
+        b"avis",
+        # We accept files with AVIF container brands; we can't yet know if
+        # the ftyp box has the correct compatible brands, but if it doesn't
+        # then the plugin will raise a SyntaxError which Pillow will catch
+        # before moving on to the next plugin that accepts the file.
+        #
+        # Also, because this file might not actually be an AVIF file, we
+        # don't raise an error if AVIF support isn't properly compiled.
+        b"mif1",
+        b"msf1",
+    ):
+        if not SUPPORTED:
+            return (
+                "image file could not be identified because AVIF support not installed"
+            )
+        return True
+    return False
+
+
+def _get_default_max_threads() -> int:
+    if DEFAULT_MAX_THREADS:
+        return DEFAULT_MAX_THREADS
+    if hasattr(os, "sched_getaffinity"):
+        return len(os.sched_getaffinity(0))
+    else:
+        return os.cpu_count() or 1
+
+
+class AvifImageFile(ImageFile.ImageFile):
+    format = "AVIF"
+    format_description = "AVIF image"
+    __frame = -1
+
+    def _open(self) -> None:
+        if not SUPPORTED:
+            msg = "image file could not be opened because AVIF support not installed"
+            raise SyntaxError(msg)
+
+        if DECODE_CODEC_CHOICE != "auto" and not _avif.decoder_codec_available(
+            DECODE_CODEC_CHOICE
+        ):
+            msg = "Invalid opening codec"
+            raise ValueError(msg)
+        self._decoder = _avif.AvifDecoder(
+            self.fp.read(),
+            DECODE_CODEC_CHOICE,
+            _get_default_max_threads(),
+        )
+
+        # Get info from decoder
+        self._size, self.n_frames, self._mode, icc, exif, exif_orientation, xmp = (
+            self._decoder.get_info()
+        )
+        self.is_animated = self.n_frames > 1
+
+        if icc:
+            self.info["icc_profile"] = icc
+        if xmp:
+            self.info["xmp"] = xmp
+
+        if exif_orientation != 1 or exif:
+            exif_data = Image.Exif()
+            if exif:
+                exif_data.load(exif)
+                original_orientation = exif_data.get(ExifTags.Base.Orientation, 1)
+            else:
+                original_orientation = 1
+            if exif_orientation != original_orientation:
+                exif_data[ExifTags.Base.Orientation] = exif_orientation
+                exif = exif_data.tobytes()
+        if exif:
+            self.info["exif"] = exif
+        self.seek(0)
+
+    def seek(self, frame: int) -> None:
+        if not self._seek_check(frame):
+            return
+
+        # Set tile
+        self.__frame = frame
+        self.tile = [ImageFile._Tile("raw", (0, 0) + self.size, 0, self.mode)]
+
+    def load(self) -> Image.core.PixelAccess | None:
+        if self.tile:
+            # We need to load the image data for this frame
+            data, timescale, pts_in_timescales, duration_in_timescales = (
+                self._decoder.get_frame(self.__frame)
+            )
+            self.info["timestamp"] = round(1000 * (pts_in_timescales / timescale))
+            self.info["duration"] = round(1000 * (duration_in_timescales / timescale))
+
+            if self.fp and self._exclusive_fp:
+                self.fp.close()
+            self.fp = BytesIO(data)
+
+        return super().load()
+
+    def load_seek(self, pos: int) -> None:
+        pass
+
+    def tell(self) -> int:
+        return self.__frame
+
+
+def _save_all(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
+    _save(im, fp, filename, save_all=True)
+
+
+def _save(
+    im: Image.Image, fp: IO[bytes], filename: str | bytes, save_all: bool = False
+) -> None:
+    info = im.encoderinfo.copy()
+    if save_all:
+        append_images = list(info.get("append_images", []))
+    else:
+        append_images = []
+
+    total = 0
+    for ims in [im] + append_images:
+        total += getattr(ims, "n_frames", 1)
+
+    quality = info.get("quality", 75)
+    if not isinstance(quality, int) or quality < 0 or quality > 100:
+        msg = "Invalid quality setting"
+        raise ValueError(msg)
+
+    duration = info.get("duration", 0)
+    subsampling = info.get("subsampling", "4:2:0")
+    speed = info.get("speed", 6)
+    max_threads = info.get("max_threads", _get_default_max_threads())
+    codec = info.get("codec", "auto")
+    if codec != "auto" and not _avif.encoder_codec_available(codec):
+        msg = "Invalid saving codec"
+        raise ValueError(msg)
+    range_ = info.get("range", "full")
+    tile_rows_log2 = info.get("tile_rows", 0)
+    tile_cols_log2 = info.get("tile_cols", 0)
+    alpha_premultiplied = bool(info.get("alpha_premultiplied", False))
+    autotiling = bool(info.get("autotiling", tile_rows_log2 == tile_cols_log2 == 0))
+
+    icc_profile = info.get("icc_profile", im.info.get("icc_profile"))
+    exif_orientation = 1
+    if exif := info.get("exif"):
+        if isinstance(exif, Image.Exif):
+            exif_data = exif
+        else:
+            exif_data = Image.Exif()
+            exif_data.load(exif)
+        if ExifTags.Base.Orientation in exif_data:
+            exif_orientation = exif_data.pop(ExifTags.Base.Orientation)
+            exif = exif_data.tobytes() if exif_data else b""
+        elif isinstance(exif, Image.Exif):
+            exif = exif_data.tobytes()
+
+    xmp = info.get("xmp")
+
+    if isinstance(xmp, str):
+        xmp = xmp.encode("utf-8")
+
+    advanced = info.get("advanced")
+    if advanced is not None:
+        if isinstance(advanced, dict):
+            advanced = advanced.items()
+        try:
+            advanced = tuple(advanced)
+        except TypeError:
+            invalid = True
+        else:
+            invalid = any(not isinstance(v, tuple) or len(v) != 2 for v in advanced)
+        if invalid:
+            msg = (
+                "advanced codec options must be a dict of key-value string "
+                "pairs or a series of key-value two-tuples"
+            )
+            raise ValueError(msg)
+
+    # Setup the AVIF encoder
+    enc = _avif.AvifEncoder(
+        im.size,
+        subsampling,
+        quality,
+        speed,
+        max_threads,
+        codec,
+        range_,
+        tile_rows_log2,
+        tile_cols_log2,
+        alpha_premultiplied,
+        autotiling,
+        icc_profile or b"",
+        exif or b"",
+        exif_orientation,
+        xmp or b"",
+        advanced,
+    )
+
+    # Add each frame
+    frame_idx = 0
+    frame_duration = 0
+    cur_idx = im.tell()
+    is_single_frame = total == 1
+    try:
+        for ims in [im] + append_images:
+            # Get number of frames in this image
+            nfr = getattr(ims, "n_frames", 1)
+
+            for idx in range(nfr):
+                ims.seek(idx)
+
+                # Make sure image mode is supported
+                frame = ims
+                rawmode = ims.mode
+                if ims.mode not in {"RGB", "RGBA"}:
+                    rawmode = "RGBA" if ims.has_transparency_data else "RGB"
+                    frame = ims.convert(rawmode)
+
+                # Update frame duration
+                if isinstance(duration, (list, tuple)):
+                    frame_duration = duration[frame_idx]
+                else:
+                    frame_duration = duration
+
+                # Append the frame to the animation encoder
+                enc.add(
+                    frame.tobytes("raw", rawmode),
+                    frame_duration,
+                    frame.size,
+                    rawmode,
+                    is_single_frame,
+                )
+
+                # Update frame index
+                frame_idx += 1
+
+                if not save_all:
+                    break
+
+    finally:
+        im.seek(cur_idx)
+
+    # Get the final output from the encoder
+    data = enc.finish()
+    if data is None:
+        msg = "cannot write file as AVIF (encoder returned None)"
+        raise OSError(msg)
+
+    fp.write(data)
+
+
+Image.register_open(AvifImageFile.format, AvifImageFile, _accept)
+if SUPPORTED:
+    Image.register_save(AvifImageFile.format, _save)
+    Image.register_save_all(AvifImageFile.format, _save_all)
+    Image.register_extensions(AvifImageFile.format, [".avif", ".avifs"])
+    Image.register_mime(AvifImageFile.format, "image/avif")

src/PIL/Image.py

@@ -1520,6 +1520,8 @@ class Image:
         # XMP tags
         if ExifTags.Base.Orientation not in self._exif:
             xmp_tags = self.info.get("XML:com.adobe.xmp")
+            if not xmp_tags and (xmp_tags := self.info.get("xmp")):
+                xmp_tags = xmp_tags.decode("utf-8")
             if xmp_tags:
                 match = re.search(r'tiff:Orientation(="|>)([0-9])', xmp_tags)
                 if match:

src/PIL/__init__.py

@@ -25,6 +25,7 @@ del _version
 
 
 _plugins = [
+    "AvifImagePlugin",
     "BlpImagePlugin",
     "BmpImagePlugin",
     "BufrStubImagePlugin",

src/PIL/_avif.pyi

@@ -0,0 +1,3 @@
+from typing import Any
+
+def __getattr__(name: str) -> Any: ...

src/PIL/features.py

@@ -17,6 +17,7 @@ modules = {
     "freetype2": ("PIL._imagingft", "freetype2_version"),
     "littlecms2": ("PIL._imagingcms", "littlecms_version"),
     "webp": ("PIL._webp", "webpdecoder_version"),
+    "avif": ("PIL._avif", "libavif_version"),
 }
 
 
@@ -288,6 +289,7 @@ def pilinfo(out: IO[str] | None = None, supported_formats: bool = True) -> None:
         ("freetype2", "FREETYPE2"),
         ("littlecms2", "LITTLECMS2"),
         ("webp", "WEBP"),
+        ("avif", "AVIF"),
         ("jpg", "JPEG"),
         ("jpg_2000", "OPENJPEG (JPEG2000)"),
         ("zlib", "ZLIB (PNG/ZIP)"),

src/_avif.c

@@ -0,0 +1,908 @@
+#define PY_SSIZE_T_CLEAN
+
+#include <Python.h>
+#include "avif/avif.h"
+
+// Encoder type
+typedef struct {
+    PyObject_HEAD avifEncoder *encoder;
+    avifImage *image;
+    int first_frame;
+} AvifEncoderObject;
+
+static PyTypeObject AvifEncoder_Type;
+
+// Decoder type
+typedef struct {
+    PyObject_HEAD avifDecoder *decoder;
+    Py_buffer buffer;
+} AvifDecoderObject;
+
+static PyTypeObject AvifDecoder_Type;
+
+static int
+normalize_tiles_log2(int value) {
+    if (value < 0) {
+        return 0;
+    } else if (value > 6) {
+        return 6;
+    } else {
+        return value;
+    }
+}
+
+static PyObject *
+exc_type_for_avif_result(avifResult result) {
+    switch (result) {
+        case AVIF_RESULT_INVALID_EXIF_PAYLOAD:
+        case AVIF_RESULT_INVALID_CODEC_SPECIFIC_OPTION:
+            return PyExc_ValueError;
+        case AVIF_RESULT_INVALID_FTYP:
+        case AVIF_RESULT_BMFF_PARSE_FAILED:
+        case AVIF_RESULT_TRUNCATED_DATA:
+        case AVIF_RESULT_NO_CONTENT:
+            return PyExc_SyntaxError;
+        default:
+            return PyExc_RuntimeError;
+    }
+}
+
+static uint8_t
+irot_imir_to_exif_orientation(const avifImage *image) {
+    uint8_t axis = image->imir.axis;
+    int imir = image->transformFlags & AVIF_TRANSFORM_IMIR;
+    int irot = image->transformFlags & AVIF_TRANSFORM_IROT;
+    if (irot) {
+        uint8_t angle = image->irot.angle;
+        if (angle == 1) {
+            if (imir) {
+                return axis ? 7   // 90 degrees anti-clockwise then swap left and right.
+                            : 5;  // 90 degrees anti-clockwise then swap top and bottom.
+            }
+            return 6;  // 90 degrees anti-clockwise.
+        }
+        if (angle == 2) {
+            if (imir) {
+                return axis
+                           ? 4   // 180 degrees anti-clockwise then swap left and right.
+                           : 2;  // 180 degrees anti-clockwise then swap top and bottom.
+            }
+            return 3;  // 180 degrees anti-clockwise.
+        }
+        if (angle == 3) {
+            if (imir) {
+                return axis
+                           ? 5   // 270 degrees anti-clockwise then swap left and right.
+                           : 7;  // 270 degrees anti-clockwise then swap top and bottom.
+            }
+            return 8;  // 270 degrees anti-clockwise.
+        }
+    }
+    if (imir) {
+        return axis ? 2   // Swap left and right.
+                    : 4;  // Swap top and bottom.
+    }
+    return 1;  // Default orientation ("top-left", no-op).
+}
+
+static void
+exif_orientation_to_irot_imir(avifImage *image, int orientation) {
+    // Mapping from Exif orientation as defined in JEITA CP-3451C section 4.6.4.A
+    // Orientation to irot and imir boxes as defined in HEIF ISO/IEC 28002-12:2021
+    // sections 6.5.10 and 6.5.12.
+    switch (orientation) {
+        case 2:  // The 0th row is at the visual top of the image, and the 0th column is
+                 // the visual right-hand side.
+            image->transformFlags |= AVIF_TRANSFORM_IMIR;
+            image->imir.axis = 1;
+            break;
+        case 3:  // The 0th row is at the visual bottom of the image, and the 0th column
+                 // is the visual right-hand side.
+            image->transformFlags |= AVIF_TRANSFORM_IROT;
+            image->irot.angle = 2;
+            break;
+        case 4:  // The 0th row is at the visual bottom of the image, and the 0th column
+                 // is the visual left-hand side.
+            image->transformFlags |= AVIF_TRANSFORM_IMIR;
+            break;
+        case 5:  // The 0th row is the visual left-hand side of the image, and the 0th
+                 // column is the visual top.
+            image->transformFlags |= AVIF_TRANSFORM_IROT | AVIF_TRANSFORM_IMIR;
+            image->irot.angle = 1;  // applied before imir according to MIAF spec
+                                    // ISO/IEC 28002-12:2021 - section 7.3.6.7
+            break;
+        case 6:  // The 0th row is the visual right-hand side of the image, and the 0th
+                 // column is the visual top.
+            image->transformFlags |= AVIF_TRANSFORM_IROT;
+            image->irot.angle = 3;
+            break;
+        case 7:  // The 0th row is the visual right-hand side of the image, and the 0th
+                 // column is the visual bottom.
+            image->transformFlags |= AVIF_TRANSFORM_IROT | AVIF_TRANSFORM_IMIR;
+            image->irot.angle = 3;  // applied before imir according to MIAF spec
+                                    // ISO/IEC 28002-12:2021 - section 7.3.6.7
+            break;
+        case 8:  // The 0th row is the visual left-hand side of the image, and the 0th
+                 // column is the visual bottom.
+            image->transformFlags |= AVIF_TRANSFORM_IROT;
+            image->irot.angle = 1;
+            break;
+    }
+}
+
+static int
+_codec_available(const char *name, avifCodecFlags flags) {
+    avifCodecChoice codec = avifCodecChoiceFromName(name);
+    if (codec == AVIF_CODEC_CHOICE_AUTO) {
+        return 0;
+    }
+    const char *codec_name = avifCodecName(codec, flags);
+    return (codec_name == NULL) ? 0 : 1;
+}
+
+PyObject *
+_decoder_codec_available(PyObject *self, PyObject *args) {
+    char *codec_name;
+    if (!PyArg_ParseTuple(args, "s", &codec_name)) {
+        return NULL;
+    }
+    int is_available = _codec_available(codec_name, AVIF_CODEC_FLAG_CAN_DECODE);
+    return PyBool_FromLong(is_available);
+}
+
+PyObject *
+_encoder_codec_available(PyObject *self, PyObject *args) {
+    char *codec_name;
+    if (!PyArg_ParseTuple(args, "s", &codec_name)) {
+        return NULL;
+    }
+    int is_available = _codec_available(codec_name, AVIF_CODEC_FLAG_CAN_ENCODE);
+    return PyBool_FromLong(is_available);
+}
+
+PyObject *
+_codec_versions(PyObject *self, PyObject *args) {
+    char buffer[256];
+    avifCodecVersions(buffer);
+    return PyUnicode_FromString(buffer);
+}
+
+static int
+_add_codec_specific_options(avifEncoder *encoder, PyObject *opts) {
+    Py_ssize_t i, size;
+    PyObject *keyval, *py_key, *py_val;
+    if (!PyTuple_Check(opts)) {
+        PyErr_SetString(PyExc_ValueError, "Invalid advanced codec options");
+        return 1;
+    }
+    size = PyTuple_GET_SIZE(opts);
+
+    for (i = 0; i < size; i++) {
+        keyval = PyTuple_GetItem(opts, i);
+        if (!PyTuple_Check(keyval) || PyTuple_GET_SIZE(keyval) != 2) {
+            PyErr_SetString(PyExc_ValueError, "Invalid advanced codec options");
+            return 1;
+        }
+        py_key = PyTuple_GetItem(keyval, 0);
+        py_val = PyTuple_GetItem(keyval, 1);
+        if (!PyUnicode_Check(py_key) || !PyUnicode_Check(py_val)) {
+            PyErr_SetString(PyExc_ValueError, "Invalid advanced codec options");
+            return 1;
+        }
+        const char *key = PyUnicode_AsUTF8(py_key);
+        const char *val = PyUnicode_AsUTF8(py_val);
+        if (key == NULL || val == NULL) {
+            PyErr_SetString(PyExc_ValueError, "Invalid advanced codec options");
+            return 1;
+        }
+
+        avifResult result = avifEncoderSetCodecSpecificOption(encoder, key, val);
+        if (result != AVIF_RESULT_OK) {
+            PyErr_Format(
+                exc_type_for_avif_result(result),
+                "Setting advanced codec options failed: %s",
+                avifResultToString(result)
+            );
+            return 1;
+        }
+    }
+    return 0;
+}
+
+// Encoder functions
+PyObject *
+AvifEncoderNew(PyObject *self_, PyObject *args) {
+    unsigned int width, height;
+    AvifEncoderObject *self = NULL;
+    avifEncoder *encoder = NULL;
+
+    char *subsampling;
+    int quality;
+    int speed;
+    int exif_orientation;
+    int max_threads;
+    Py_buffer icc_buffer;
+    Py_buffer exif_buffer;
+    Py_buffer xmp_buffer;
+    int alpha_premultiplied;
+    int autotiling;
+    int tile_rows_log2;
+    int tile_cols_log2;
+
+    char *codec;
+    char *range;
+
+    PyObject *advanced;
+    int error = 0;
+
+    if (!PyArg_ParseTuple(
+            args,
+            "(II)siiissiippy*y*iy*O",
+            &width,
+            &height,
+            &subsampling,
+            &quality,
+            &speed,
+            &max_threads,
+            &codec,
+            &range,
+            &tile_rows_log2,
+            &tile_cols_log2,
+            &alpha_premultiplied,
+            &autotiling,
+            &icc_buffer,
+            &exif_buffer,
+            &exif_orientation,
+            &xmp_buffer,
+            &advanced
+        )) {
+        return NULL;
+    }
+
+    // Create a new animation encoder and picture frame
+    avifImage *image = avifImageCreateEmpty();
+    if (image == NULL) {
+        PyErr_SetString(PyExc_ValueError, "Image creation failed");
+        error = 1;
+        goto end;
+    }
+
+    // Set these in advance so any upcoming RGB -> YUV use the proper coefficients
+    if (strcmp(range, "full") == 0) {
+        image->yuvRange = AVIF_RANGE_FULL;
+    } else if (strcmp(range, "limited") == 0) {
+        image->yuvRange = AVIF_RANGE_LIMITED;
+    } else {
+        PyErr_SetString(PyExc_ValueError, "Invalid range");
+        error = 1;
+        goto end;
+    }
+    if (strcmp(subsampling, "4:0:0") == 0) {
+        image->yuvFormat = AVIF_PIXEL_FORMAT_YUV400;
+    } else if (strcmp(subsampling, "4:2:0") == 0) {
+        image->yuvFormat = AVIF_PIXEL_FORMAT_YUV420;
+    } else if (strcmp(subsampling, "4:2:2") == 0) {
+        image->yuvFormat = AVIF_PIXEL_FORMAT_YUV422;
+    } else if (strcmp(subsampling, "4:4:4") == 0) {
+        image->yuvFormat = AVIF_PIXEL_FORMAT_YUV444;
+    } else {
+        PyErr_Format(PyExc_ValueError, "Invalid subsampling: %s", subsampling);
+        error = 1;
+        goto end;
+    }
+
+    // Validate canvas dimensions
+    if (width == 0 || height == 0) {
+        PyErr_SetString(PyExc_ValueError, "invalid canvas dimensions");
+        error = 1;
+        goto end;
+    }
+    image->width = width;
+    image->height = height;
+
+    image->depth = 8;
+    image->alphaPremultiplied = alpha_premultiplied ? AVIF_TRUE : AVIF_FALSE;
+
+    encoder = avifEncoderCreate();
+    if (!encoder) {
+        PyErr_SetString(PyExc_MemoryError, "Can't allocate encoder");
+        error = 1;
+        goto end;
+    }
+
+    int is_aom_encode = strcmp(codec, "aom") == 0 ||
+                        (strcmp(codec, "auto") == 0 &&
+                         _codec_available("aom", AVIF_CODEC_FLAG_CAN_ENCODE));
+    encoder->maxThreads = is_aom_encode && max_threads > 64 ? 64 : max_threads;
+
+    encoder->quality = quality;
+
+    if (strcmp(codec, "auto") == 0) {
+        encoder->codecChoice = AVIF_CODEC_CHOICE_AUTO;
+    } else {
+        encoder->codecChoice = avifCodecChoiceFromName(codec);
+    }
+    if (speed < AVIF_SPEED_SLOWEST) {
+        speed = AVIF_SPEED_SLOWEST;
+    } else if (speed > AVIF_SPEED_FASTEST) {
+        speed = AVIF_SPEED_FASTEST;
+    }
+    encoder->speed = speed;
+    encoder->timescale = (uint64_t)1000;
+
+    encoder->autoTiling = autotiling ? AVIF_TRUE : AVIF_FALSE;
+    if (!autotiling) {
+        encoder->tileRowsLog2 = normalize_tiles_log2(tile_rows_log2);
+        encoder->tileColsLog2 = normalize_tiles_log2(tile_cols_log2);
+    }
+
+    if (advanced != Py_None && _add_codec_specific_options(encoder, advanced)) {
+        error = 1;
+        goto end;
+    }
+
+    self = PyObject_New(AvifEncoderObject, &AvifEncoder_Type);
+    if (!self) {
+        PyErr_SetString(PyExc_RuntimeError, "could not create encoder object");
+        error = 1;
+        goto end;
+    }
+    self->first_frame = 1;
+
+    avifResult result;
+    if (icc_buffer.len) {
+        result = avifImageSetProfileICC(image, icc_buffer.buf, icc_buffer.len);
+        if (result != AVIF_RESULT_OK) {
+            PyErr_Format(
+                exc_type_for_avif_result(result),
+                "Setting ICC profile failed: %s",
+                avifResultToString(result)
+            );
+            error = 1;
+            goto end;
+        }
+        // colorPrimaries and transferCharacteristics are ignored when an ICC
+        // profile is present, so set them to UNSPECIFIED.
+        image->colorPrimaries = AVIF_COLOR_PRIMARIES_UNSPECIFIED;
+        image->transferCharacteristics = AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED;
+    } else {
+        image->colorPrimaries = AVIF_COLOR_PRIMARIES_BT709;
+        image->transferCharacteristics = AVIF_TRANSFER_CHARACTERISTICS_SRGB;
+    }
+    image->matrixCoefficients = AVIF_MATRIX_COEFFICIENTS_BT601;
+
+    if (exif_buffer.len) {
+        result = avifImageSetMetadataExif(image, exif_buffer.buf, exif_buffer.len);
+        if (result != AVIF_RESULT_OK) {
+            PyErr_Format(
+                exc_type_for_avif_result(result),
+                "Setting EXIF data failed: %s",
+                avifResultToString(result)
+            );
+            error = 1;
+            goto end;
+        }
+    }
+
+    if (xmp_buffer.len) {
+        result = avifImageSetMetadataXMP(image, xmp_buffer.buf, xmp_buffer.len);
+        if (result != AVIF_RESULT_OK) {
+            PyErr_Format(
+                exc_type_for_avif_result(result),
+                "Setting XMP data failed: %s",
+                avifResultToString(result)
+            );
+            error = 1;
+            goto end;
+        }
+    }
+
+    if (exif_orientation > 1) {
+        exif_orientation_to_irot_imir(image, exif_orientation);
+    }
+
+    self->image = image;
+    self->encoder = encoder;
+
+end:
+    PyBuffer_Release(&icc_buffer);
+    PyBuffer_Release(&exif_buffer);
+    PyBuffer_Release(&xmp_buffer);
+
+    if (error) {
+        if (image) {
+            avifImageDestroy(image);
+        }
+        if (encoder) {
+            avifEncoderDestroy(encoder);
+        }
+        if (self) {
+            PyObject_Del(self);
+        }
+        return NULL;
+    }
+
+    return (PyObject *)self;
+}
+
+PyObject *
+_encoder_dealloc(AvifEncoderObject *self) {
+    if (self->encoder) {
+        avifEncoderDestroy(self->encoder);
+    }
+    if (self->image) {
+        avifImageDestroy(self->image);
+    }
+    Py_RETURN_NONE;
+}
+
+PyObject *
+_encoder_add(AvifEncoderObject *self, PyObject *args) {
+    uint8_t *rgb_bytes;
+    Py_ssize_t size;
+    unsigned int duration;
+    unsigned int width;
+    unsigned int height;
+    char *mode;
+    unsigned int is_single_frame;
+    int error = 0;
+
+    avifRGBImage rgb;
+    avifResult result;
+
+    avifEncoder *encoder = self->encoder;
+    avifImage *image = self->image;
+    avifImage *frame = NULL;
+
+    if (!PyArg_ParseTuple(
+            args,
+            "y#I(II)sp",
+            (char **)&rgb_bytes,
+            &size,
+            &duration,
+            &width,
+            &height,
+            &mode,
+            &is_single_frame
+        )) {
+        return NULL;
+    }
+
+    if (image->width != width || image->height != height) {
+        PyErr_Format(
+            PyExc_ValueError,
+            "Image sequence dimensions mismatch, %ux%u != %ux%u",
+            image->width,
+            image->height,
+            width,
+            height
+        );
+        return NULL;
+    }
+
+    if (self->first_frame) {
+        // If we don't have an image populated with yuv planes, this is the first frame
+        frame = image;
+    } else {
+        frame = avifImageCreateEmpty();
+        if (image == NULL) {
+            PyErr_SetString(PyExc_ValueError, "Image creation failed");
+            return NULL;
+        }
+
+        frame->width = width;
+        frame->height = height;
+        frame->colorPrimaries = image->colorPrimaries;
+        frame->transferCharacteristics = image->transferCharacteristics;
+        frame->matrixCoefficients = image->matrixCoefficients;
+        frame->yuvRange = image->yuvRange;
+        frame->yuvFormat = image->yuvFormat;
+        frame->depth = image->depth;
+        frame->alphaPremultiplied = image->alphaPremultiplied;
+    }
+
+    avifRGBImageSetDefaults(&rgb, frame);
+
+    if (strcmp(mode, "RGBA") == 0) {
+        rgb.format = AVIF_RGB_FORMAT_RGBA;
+    } else {
+        rgb.format = AVIF_RGB_FORMAT_RGB;
+    }
+
+    result = avifRGBImageAllocatePixels(&rgb);
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Pixel allocation failed: %s",
+            avifResultToString(result)
+        );
+        error = 1;
+        goto end;
+    }
+
+    if (rgb.rowBytes * rgb.height != size) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "rgb data has incorrect size: %u * %u (%u) != %u",
+            rgb.rowBytes,
+            rgb.height,
+            rgb.rowBytes * rgb.height,
+            size
+        );
+        error = 1;
+        goto end;
+    }
+
+    // rgb.pixels is safe for writes
+    memcpy(rgb.pixels, rgb_bytes, size);
+
+    Py_BEGIN_ALLOW_THREADS;
+    result = avifImageRGBToYUV(frame, &rgb);
+    Py_END_ALLOW_THREADS;
+
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Conversion to YUV failed: %s",
+            avifResultToString(result)
+        );
+        error = 1;
+        goto end;
+    }
+
+    uint32_t addImageFlags =
+        is_single_frame ? AVIF_ADD_IMAGE_FLAG_SINGLE : AVIF_ADD_IMAGE_FLAG_NONE;
+
+    Py_BEGIN_ALLOW_THREADS;
+    result = avifEncoderAddImage(encoder, frame, duration, addImageFlags);
+    Py_END_ALLOW_THREADS;
+
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Failed to encode image: %s",
+            avifResultToString(result)
+        );
+        error = 1;
+        goto end;
+    }
+
+end:
+    if (&rgb) {
+        avifRGBImageFreePixels(&rgb);
+    }
+    if (!self->first_frame) {
+        avifImageDestroy(frame);
+    }
+
+    if (error) {
+        return NULL;
+    }
+    self->first_frame = 0;
+    Py_RETURN_NONE;
+}
+
+PyObject *
+_encoder_finish(AvifEncoderObject *self) {
+    avifEncoder *encoder = self->encoder;
+
+    avifRWData raw = AVIF_DATA_EMPTY;
+    avifResult result;
+    PyObject *ret = NULL;
+
+    Py_BEGIN_ALLOW_THREADS;
+    result = avifEncoderFinish(encoder, &raw);
+    Py_END_ALLOW_THREADS;
+
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Failed to finish encoding: %s",
+            avifResultToString(result)
+        );
+        avifRWDataFree(&raw);
+        return NULL;
+    }
+
+    ret = PyBytes_FromStringAndSize((char *)raw.data, raw.size);
+
+    avifRWDataFree(&raw);
+
+    return ret;
+}
+
+// Decoder functions
+PyObject *
+AvifDecoderNew(PyObject *self_, PyObject *args) {
+    Py_buffer buffer;
+    AvifDecoderObject *self = NULL;
+    avifDecoder *decoder;
+
+    char *codec_str;
+    avifCodecChoice codec;
+    int max_threads;
+
+    avifResult result;
+
+    if (!PyArg_ParseTuple(args, "y*si", &buffer, &codec_str, &max_threads)) {
+        return NULL;
+    }
+
+    if (strcmp(codec_str, "auto") == 0) {
+        codec = AVIF_CODEC_CHOICE_AUTO;
+    } else {
+        codec = avifCodecChoiceFromName(codec_str);
+    }
+
+    self = PyObject_New(AvifDecoderObject, &AvifDecoder_Type);
+    if (!self) {
+        PyErr_SetString(PyExc_RuntimeError, "could not create decoder object");
+        PyBuffer_Release(&buffer);
+        return NULL;
+    }
+
+    decoder = avifDecoderCreate();
+    if (!decoder) {
+        PyErr_SetString(PyExc_MemoryError, "Can't allocate decoder");
+        PyBuffer_Release(&buffer);
+        PyObject_Del(self);
+        return NULL;
+    }
+    decoder->maxThreads = max_threads;
+    // Turn off libavif's 'clap' (clean aperture) property validation.
+    decoder->strictFlags &= ~AVIF_STRICT_CLAP_VALID;
+    // Allow the PixelInformationProperty ('pixi') to be missing in AV1 image
+    // items. libheif v1.11.0 and older does not add the 'pixi' item property to
+    // AV1 image items.
+    decoder->strictFlags &= ~AVIF_STRICT_PIXI_REQUIRED;
+    decoder->codecChoice = codec;
+
+    result = avifDecoderSetIOMemory(decoder, buffer.buf, buffer.len);
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Setting IO memory failed: %s",
+            avifResultToString(result)
+        );
+        avifDecoderDestroy(decoder);
+        PyBuffer_Release(&buffer);
+        PyObject_Del(self);
+        return NULL;
+    }
+
+    result = avifDecoderParse(decoder);
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Failed to decode image: %s",
+            avifResultToString(result)
+        );
+        avifDecoderDestroy(decoder);
+        PyBuffer_Release(&buffer);
+        PyObject_Del(self);
+        return NULL;
+    }
+
+    self->decoder = decoder;
+    self->buffer = buffer;
+
+    return (PyObject *)self;
+}
+
+PyObject *
+_decoder_dealloc(AvifDecoderObject *self) {
+    if (self->decoder) {
+        avifDecoderDestroy(self->decoder);
+    }
+    PyBuffer_Release(&self->buffer);
+    Py_RETURN_NONE;
+}
+
+PyObject *
+_decoder_get_info(AvifDecoderObject *self) {
+    avifDecoder *decoder = self->decoder;
+    avifImage *image = decoder->image;
+
+    PyObject *icc = NULL;
+    PyObject *exif = NULL;
+    PyObject *xmp = NULL;
+    PyObject *ret = NULL;
+
+    if (image->xmp.size) {
+        xmp = PyBytes_FromStringAndSize((const char *)image->xmp.data, image->xmp.size);
+    }
+
+    if (image->exif.size) {
+        exif =
+            PyBytes_FromStringAndSize((const char *)image->exif.data, image->exif.size);
+    }
+
+    if (image->icc.size) {
+        icc = PyBytes_FromStringAndSize((const char *)image->icc.data, image->icc.size);
+    }
+
+    ret = Py_BuildValue(
+        "(II)IsSSIS",
+        image->width,
+        image->height,
+        decoder->imageCount,
+        decoder->alphaPresent ? "RGBA" : "RGB",
+        NULL == icc ? Py_None : icc,
+        NULL == exif ? Py_None : exif,
+        irot_imir_to_exif_orientation(image),
+        NULL == xmp ? Py_None : xmp
+    );
+
+    Py_XDECREF(xmp);
+    Py_XDECREF(exif);
+    Py_XDECREF(icc);
+
+    return ret;
+}
+
+PyObject *
+_decoder_get_frame(AvifDecoderObject *self, PyObject *args) {
+    PyObject *bytes;
+    PyObject *ret;
+    Py_ssize_t size;
+    avifResult result;
+    avifRGBImage rgb;
+    avifDecoder *decoder;
+    avifImage *image;
+    uint32_t frame_index;
+
+    decoder = self->decoder;
+
+    if (!PyArg_ParseTuple(args, "I", &frame_index)) {
+        return NULL;
+    }
+
+    result = avifDecoderNthImage(decoder, frame_index);
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Failed to decode frame %u: %s",
+            frame_index,
+            avifResultToString(result)
+        );
+        return NULL;
+    }
+
+    image = decoder->image;
+
+    avifRGBImageSetDefaults(&rgb, image);
+
+    rgb.depth = 8;
+    rgb.format = decoder->alphaPresent ? AVIF_RGB_FORMAT_RGBA : AVIF_RGB_FORMAT_RGB;
+
+    result = avifRGBImageAllocatePixels(&rgb);
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Pixel allocation failed: %s",
+            avifResultToString(result)
+        );
+        return NULL;
+    }
+
+    Py_BEGIN_ALLOW_THREADS;
+    result = avifImageYUVToRGB(image, &rgb);
+    Py_END_ALLOW_THREADS;
+
+    if (result != AVIF_RESULT_OK) {
+        PyErr_Format(
+            exc_type_for_avif_result(result),
+            "Conversion from YUV failed: %s",
+            avifResultToString(result)
+        );
+        avifRGBImageFreePixels(&rgb);
+        return NULL;
+    }
+
+    if (rgb.height > PY_SSIZE_T_MAX / rgb.rowBytes) {
+        PyErr_SetString(PyExc_MemoryError, "Integer overflow in pixel size");
+        return NULL;
+    }
+
+    size = rgb.rowBytes * rgb.height;
+
+    bytes = PyBytes_FromStringAndSize((char *)rgb.pixels, size);
+    avifRGBImageFreePixels(&rgb);
+
+    ret = Py_BuildValue(
+        "SKKK",
+        bytes,
+        decoder->timescale,
+        decoder->imageTiming.ptsInTimescales,
+        decoder->imageTiming.durationInTimescales
+    );
+
+    Py_DECREF(bytes);
+
+    return ret;
+}
+
+/* -------------------------------------------------------------------- */
+/* Type Definitions                                                     */
+/* -------------------------------------------------------------------- */
+
+// AvifEncoder methods
+static struct PyMethodDef _encoder_methods[] = {
+    {"add", (PyCFunction)_encoder_add, METH_VARARGS},
+    {"finish", (PyCFunction)_encoder_finish, METH_NOARGS},
+    {NULL, NULL} /* sentinel */
+};
+
+// AvifEncoder type definition
+static PyTypeObject AvifEncoder_Type = {
+    PyVarObject_HEAD_INIT(NULL, 0).tp_name = "AvifEncoder",
+    .tp_basicsize = sizeof(AvifEncoderObject),
+    .tp_dealloc = (destructor)_encoder_dealloc,
+    .tp_methods = _encoder_methods,
+};
+
+// AvifDecoder methods
+static struct PyMethodDef _decoder_methods[] = {
+    {"get_info", (PyCFunction)_decoder_get_info, METH_NOARGS},
+    {"get_frame", (PyCFunction)_decoder_get_frame, METH_VARARGS},
+    {NULL, NULL} /* sentinel */
+};
+
+// AvifDecoder type definition
+static PyTypeObject AvifDecoder_Type = {
+    PyVarObject_HEAD_INIT(NULL, 0).tp_name = "AvifDecoder",
+    .tp_basicsize = sizeof(AvifDecoderObject),
+    .tp_dealloc = (destructor)_decoder_dealloc,
+    .tp_methods = _decoder_methods,
+};
+
+/* -------------------------------------------------------------------- */
+/* Module Setup                                                         */
+/* -------------------------------------------------------------------- */
+
+static PyMethodDef avifMethods[] = {
+    {"AvifDecoder", AvifDecoderNew, METH_VARARGS},
+    {"AvifEncoder", AvifEncoderNew, METH_VARARGS},
+    {"decoder_codec_available", _decoder_codec_available, METH_VARARGS},
+    {"encoder_codec_available", _encoder_codec_available, METH_VARARGS},
+    {"codec_versions", _codec_versions, METH_NOARGS},
+    {NULL, NULL}
+};
+
+static int
+setup_module(PyObject *m) {
+    if (PyType_Ready(&AvifDecoder_Type) < 0 || PyType_Ready(&AvifEncoder_Type) < 0) {
+        return -1;
+    }
+
+    PyObject *d = PyModule_GetDict(m);
+    PyObject *v = PyUnicode_FromString(avifVersion());
+    PyDict_SetItemString(d, "libavif_version", v ? v : Py_None);
+    Py_XDECREF(v);
+
+    return 0;
+}
+
+PyMODINIT_FUNC
+PyInit__avif(void) {
+    PyObject *m;
+
+    static PyModuleDef module_def = {
+        PyModuleDef_HEAD_INIT,
+        .m_name = "_avif",
+        .m_size = -1,
+        .m_methods = avifMethods,
+    };
+
+    m = PyModule_Create(&module_def);
+    if (setup_module(m) < 0) {
+        Py_DECREF(m);
+        return NULL;
+    }
+
+#ifdef Py_GIL_DISABLED
+    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
+#endif
+
+    return m;
+}

wheels/dependency_licenses/AOM.txt

@@ -0,0 +1,26 @@
+Copyright (c) 2016, Alliance for Open Media. 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 HOLDER 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.

wheels/dependency_licenses/DAV1D.txt

@@ -0,0 +1,23 @@
+Copyright © 2018-2019, 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.

wheels/dependency_licenses/LIBAVIF.txt

@@ -0,0 +1,387 @@
+Copyright 2019 Joe Drago. 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 HOLDER 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.
+
+------------------------------------------------------------------------------
+
+Files: src/obu.c
+
+Copyright © 2018-2019, 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.
+
+------------------------------------------------------------------------------
+
+Files: third_party/iccjpeg/*
+
+In plain English:
+
+1. We don't promise that this software works.  (But if you find any bugs,
+   please let us know!)
+2. You can use this software for whatever you want.  You don't have to pay us.
+3. You may not pretend that you wrote this software.  If you use it in a
+   program, you must acknowledge somewhere in your documentation that
+   you've used the IJG code.
+
+In legalese:
+
+The authors make NO WARRANTY or representation, either express or implied,
+with respect to this software, its quality, accuracy, merchantability, or
+fitness for a particular purpose.  This software is provided "AS IS", and you,
+its user, assume the entire risk as to its quality and accuracy.
+
+This software is copyright (C) 1991-2013, Thomas G. Lane, Guido Vollbeding.
+All Rights Reserved except as specified below.
+
+Permission is hereby granted to use, copy, modify, and distribute this
+software (or portions thereof) for any purpose, without fee, subject to these
+conditions:
+(1) If any part of the source code for this software is distributed, then this
+README file must be included, with this copyright and no-warranty notice
+unaltered; and any additions, deletions, or changes to the original files
+must be clearly indicated in accompanying documentation.
+(2) If only executable code is distributed, then the accompanying
+documentation must state that "this software is based in part on the work of
+the Independent JPEG Group".
+(3) Permission for use of this software is granted only if the user accepts
+full responsibility for any undesirable consequences; the authors accept
+NO LIABILITY for damages of any kind.
+
+These conditions apply to any software derived from or based on the IJG code,
+not just to the unmodified library.  If you use our work, you ought to
+acknowledge us.
+
+Permission is NOT granted for the use of any IJG author's name or company name
+in advertising or publicity relating to this software or products derived from
+it.  This software may be referred to only as "the Independent JPEG Group's
+software".
+
+We specifically permit and encourage the use of this software as the basis of
+commercial products, provided that all warranty or liability claims are
+assumed by the product vendor.
+
+
+The Unix configuration script "configure" was produced with GNU Autoconf.
+It is copyright by the Free Software Foundation but is freely distributable.
+The same holds for its supporting scripts (config.guess, config.sub,
+ltmain.sh).  Another support script, install-sh, is copyright by X Consortium
+but is also freely distributable.
+
+The IJG distribution formerly included code to read and write GIF files.
+To avoid entanglement with the Unisys LZW patent, GIF reading support has
+been removed altogether, and the GIF writer has been simplified to produce
+"uncompressed GIFs".  This technique does not use the LZW algorithm; the
+resulting GIF files are larger than usual, but are readable by all standard
+GIF decoders.
+
+We are required to state that
+    "The Graphics Interchange Format(c) is the Copyright property of
+    CompuServe Incorporated.  GIF(sm) is a Service Mark property of
+    CompuServe Incorporated."
+
+------------------------------------------------------------------------------
+
+Files: contrib/gdk-pixbuf/*
+
+Copyright 2020 Emmanuel Gil Peyrot. 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
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+2. Redistributions in binary form must reproduce the above copyright notice,
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+------------------------------------------------------------------------------
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+Files: third_party/libyuv/*
+
+Copyright 2011 The LibYuv Project 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:
+
+  * 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 Google nor the names of its 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
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+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER 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.

wheels/dependency_licenses/LIBYUV.txt

@@ -0,0 +1,29 @@
+Copyright 2011 The LibYuv Project 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:
+
+  * 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 Google nor the names of its 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
+HOLDER 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.

wheels/dependency_licenses/RAV1E.txt

@@ -0,0 +1,25 @@
+BSD 2-Clause License
+
+Copyright (c) 2017-2023, the rav1e contributors
+All rights reserved.
+
+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.
+
+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 HOLDER 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.

wheels/dependency_licenses/SVT-AV1.txt

@@ -0,0 +1,26 @@
+Copyright (c) 2019, Alliance for Open Media. 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 HOLDER 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.

winbuild/build.rst

@@ -61,6 +61,7 @@ Run ``build_prepare.py`` to configure the build::
       --no-imagequant       skip GPL-licensed optional dependency libimagequant
       --no-fribidi, --no-raqm
                             skip LGPL-licensed optional dependency FriBiDi
+      --no-avif             skip optional dependency libavif
 
     Arguments can also be supplied using the environment variables PILLOW_BUILD,
     PILLOW_DEPS, ARCHITECTURE. See winbuild\build.rst for more information.

winbuild/build_prepare.py

@@ -116,6 +116,7 @@ V = {
     "HARFBUZZ": "11.0.0",
     "JPEGTURBO": "3.1.0",
     "LCMS2": "2.17",
+    "LIBAVIF": "1.2.1",
     "LIBIMAGEQUANT": "4.3.4",
     "LIBPNG": "1.6.47",
     "LIBWEBP": "1.5.0",
@@ -378,6 +379,26 @@ DEPS: dict[str, dict[str, Any]] = {
         ],
         "bins": [r"*.dll"],
     },
+    "libavif": {
+        "url": f"https://github.com/AOMediaCodec/libavif/archive/v{V['LIBAVIF']}.zip",
+        "filename": f"libavif-{V['LIBAVIF']}.zip",
+        "license": "LICENSE",
+        "build": [
+            f"{sys.executable} -m pip install meson",
+            *cmds_cmake(
+                "avif_static",
+                "-DBUILD_SHARED_LIBS=OFF",
+                "-DAVIF_LIBSHARPYUV=LOCAL",
+                "-DAVIF_LIBYUV=LOCAL",
+                "-DAVIF_CODEC_AOM=LOCAL",
+                "-DAVIF_CODEC_DAV1D=LOCAL",
+                "-DAVIF_CODEC_RAV1E=LOCAL",
+                "-DAVIF_CODEC_SVT=LOCAL",
+            ),
+            cmd_xcopy("include", "{inc_dir}"),
+        ],
+        "libs": ["avif.lib"],
+    },
 }
 
 
@@ -683,6 +704,11 @@ def main() -> None:
         action="store_true",
         help="skip LGPL-licensed optional dependency FriBiDi",
     )
+    parser.add_argument(
+        "--no-avif",
+        action="store_true",
+        help="skip optional dependency libavif",
+    )
     args = parser.parse_args()
 
     arch_prefs = ARCHITECTURES[args.architecture]
@@ -723,6 +749,8 @@ def main() -> None:
         disabled += ["libimagequant"]
     if args.no_fribidi:
         disabled += ["fribidi"]
+    if args.no_avif or args.architecture != "AMD64":
+        disabled += ["libavif"]
 
     prefs = {
         "architecture": args.architecture,