add arm64 support and update native components

Author: Spacefish

.github/workflows/build-avif-binaries.yml

@@ -0,0 +1,41 @@
+name: Build AVIF binaries
+
+on:
+  push:
+    # any branch
+    branches: [ "*" ]
+  workflow_dispatch: # Allows manual triggering  
+
+jobs:
+  build-amd64:
+    runs-on: ubuntu-24.04-arm
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential nasm cmake ninja-build libjpeg-dev libpng-dev libtiff-dev libwebp-dev libaom-dev libyuv-dev zlib1g-dev
+
+      - name: Build libavif binaries
+        run: |
+          cd libavif
+          mkdir -p build
+          cd build
+          cmake -DBUILD_SHARED_LIBS=OFF -DCONFIG_PIC=1 -DCMAKE_BUILD_TYPE=Release -DAVIF_CODEC_AOM=LOCAL -DAVIF_LIBYUV=LOCAL -DAVIF_BUILD_APPS=ON -G Ninja ..
+          ninja
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: c-native-artifact
+          path: |
+            libavif/build/avifenc
+            libavif/build/avifdec
+          if-no-files-found: error
+          # Retain artifacts for 1 day
+          retention-days: 1
+

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "libavif"]
+	path = libavif
+	url = https://github.com/AOMediaCodec/libavif.git

libavif

@@ -10,11 +10,18 @@ public static class Native {
 
     private static string OSFolder {
         get {
-            if(RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-                return "linux";
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+            {
+                if (RuntimeInformation.ProcessArchitecture == Architecture.X64)
+                    return "linux-x64";
+                if (RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
+                    return "linux-arm64";
+                throw new InvalidOperationException("Only x64 and arm64 are supported on Linux.");
+            }
 
-            if(RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
-                if(Environment.Is64BitProcess)
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                if (Environment.Is64BitProcess)
                     return "win-x64";
 
                 throw new InvalidOperationException("Only x64 is supported on Windows.");

src/Native.cs

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Version>1.2.1</Version>
+    <Version>1.3.0</Version>
     <Description>Avif encoding and decoding support via avifenc/avifdec binary (included) for ImageSharp</Description>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <TargetFramework>net8.0</TargetFramework>