Cross-build Windows native bundle on Linux

native/age_movie_ffmpeg/bootstrap-win64.ps1

@@ -23,10 +23,10 @@ if ($actualHash -ne $manifest.sha256) {
 if (-not (Test-Path -LiteralPath $extractRoot)) {
     Expand-Archive -LiteralPath $archivePath -DestinationPath $Destination
 }
-$sdkRoot = Get-ChildItem -LiteralPath $Destination -Directory |
-    Where-Object { Test-Path -LiteralPath (Join-Path $_.FullName 'include\libavformat\avformat.h') } |
-    Select-Object -First 1 -ExpandProperty FullName
-if (-not $sdkRoot) { throw "FFmpeg SDK was not found under $Destination" }
+$sdkRoot = $extractRoot
+if (-not (Test-Path -LiteralPath (Join-Path $sdkRoot 'include\libavformat\avformat.h'))) {
+    throw "Pinned FFmpeg SDK was not found at $sdkRoot"
+}
 $reported = & (Join-Path $sdkRoot 'bin\ffmpeg.exe') -version | Select-Object -First 1
 $expectedVersion = $manifest.ffmpeg_version -replace '-20260721$', ''
 if ($reported -notlike "*$expectedVersion*" ) {

native/age_movie_ffmpeg/bootstrap-win64.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+script_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd -- "$script_dir/../.." && pwd)"
+destination="${1:-$repo_root/build/ffmpeg-sdk}"
+manifest="$script_dir/dependency-win64.json"
+
+manifest_value() {
+    python3 -c 'import json, sys; print(json.load(open(sys.argv[1], encoding="utf-8"))[sys.argv[2]])' \
+        "$manifest" "$1"
+}
+
+for command in python3 curl sha256sum awk; do
+    command -v "$command" >/dev/null 2>&1 || {
+        echo "required command was not found: $command" >&2
+        exit 1
+    }
+done
+
+archive="$(manifest_value archive)"
+url="$(manifest_value url)"
+expected_hash="$(manifest_value sha256)"
+archive_root="${archive%.zip}"
+download_directory="$repo_root/build/downloads"
+archive_path="$download_directory/$archive"
+sdk_root="$destination/$archive_root"
+
+mkdir -p -- "$download_directory" "$destination"
+if [[ ! -f "$archive_path" ]]; then
+    curl --fail --location --retry 3 --output "$archive_path" "$url"
+fi
+
+actual_hash="$(sha256sum "$archive_path" | awk '{ print $1 }')"
+if [[ "$actual_hash" != "$expected_hash" ]]; then
+    echo "FFmpeg archive SHA-256 mismatch: expected $expected_hash, got $actual_hash" >&2
+    exit 1
+fi
+
+if [[ ! -d "$sdk_root" ]]; then
+    python3 -m zipfile -e "$archive_path" "$destination"
+fi
+
+for required in \
+    "$sdk_root/include/libavformat/avformat.h" \
+    "$sdk_root/lib/libavformat.dll.a" \
+    "$sdk_root/lib/libavcodec.dll.a" \
+    "$sdk_root/lib/libavutil.dll.a" \
+    "$sdk_root/lib/libswscale.dll.a" \
+    "$sdk_root/lib/libswresample.dll.a" \
+    "$sdk_root/bin/ffmpeg.exe" \
+    "$sdk_root/LICENSE.txt"; do
+    if [[ ! -e "$required" ]]; then
+        echo "FFmpeg SDK file was not found after extraction: $required" >&2
+        exit 1
+    fi
+done
+
+printf '%s\n' "$sdk_root"

native/age_movie_ffmpeg/build-win64.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -lt 1 || $# -gt 2 ]]; then
+    echo "usage: $0 <ffmpeg-sdk-root> [output-directory]" >&2
+    exit 2
+fi
+
+script_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd -- "$script_dir/../.." && pwd)"
+sdk_root="$(cd -- "$1" && pwd)"
+output_directory_input="${2:-$repo_root/build/native/win-x64}"
+mkdir -p -- "$output_directory_input"
+output_directory="$(cd -- "$output_directory_input" && pwd)"
+include_directory="$sdk_root/include"
+library_directory="$sdk_root/lib"
+binary_directory="$sdk_root/bin"
+compiler="${MINGW_CC:-x86_64-w64-mingw32-gcc}"
+objdump="${MINGW_OBJDUMP:-x86_64-w64-mingw32-objdump}"
+shim="$output_directory/age_movie_ffmpeg.dll"
+
+for command in "$compiler" "$objdump" python3; do
+    command -v "$command" >/dev/null 2>&1 || {
+        echo "required command was not found: $command" >&2
+        exit 1
+    }
+done
+
+for required in \
+    "$include_directory/libavformat/avformat.h" \
+    "$library_directory/libavformat.dll.a" \
+    "$library_directory/libavcodec.dll.a" \
+    "$library_directory/libavutil.dll.a" \
+    "$library_directory/libswscale.dll.a" \
+    "$library_directory/libswresample.dll.a" \
+    "$sdk_root/LICENSE.txt"; do
+    if [[ ! -e "$required" ]]; then
+        echo "missing FFmpeg SDK file: $required" >&2
+        exit 1
+    fi
+done
+
+"$compiler" \
+    -std=c11 -O2 -Wall -Wextra -static-libgcc \
+    -I "$include_directory" \
+    -shared -Wl,--no-undefined -Wl,--no-insert-timestamp \
+    -o "$shim" "$script_dir/age_movie.c" \
+    -L "$library_directory" \
+    -lavformat -lavcodec -lavutil -lswscale -lswresample
+
+runtime_libraries=(
+    avformat-62.dll
+    avcodec-62.dll
+    avutil-60.dll
+    swscale-9.dll
+    swresample-6.dll
+)
+for runtime in "${runtime_libraries[@]}"; do
+    source_library="$binary_directory/$runtime"
+    if [[ ! -f "$source_library" ]]; then
+        echo "missing FFmpeg runtime library: $source_library" >&2
+        exit 1
+    fi
+    cp -- "$source_library" "$output_directory/$runtime"
+done
+cp -- "$sdk_root/LICENSE.txt" "$output_directory/FFmpeg-LICENSE.txt"
+
+python3 -X utf8 "$repo_root/tools/verify_windows_native.py" \
+    "$output_directory" \
+    --objdump "$objdump" \
+    --report "$output_directory/verification.json"
+
+printf '%s\n' "$shim"