Update provisioning script to build FFmpeg for iOS

as xcframeworks so that we can provide both arm64 and arm64-simulator
versions (the former can be used in App Store, the latter when
working with a simulator).

Task-number: QTBUG-132313
Change-Id: Ic683f58dffcef8a06adb4a915c4e3abc4ab219e5
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
(cherry picked from commit 1968adc126)
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Jukka Jokiniva <jukka.jokiniva@qt.io>
(cherry picked from commit 27be5c2f98)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

coin/provisioning/common/unix/install-ffmpeg-ios.sh

@@ -28,48 +28,49 @@ fi
 ffmpeg_config_options=$(cat "${BASH_SOURCE%/*}/../shared/ffmpeg_config_options.txt")
 
 build_ffmpeg_ios() {
-  local target_arch=$1
+    local target_platform=$1
+    if [ "$target_platform" == "arm64-simulator" ]; then
+        target_sdk="iphonesimulator"
+        target_platform="arm64"
+        minos="-mios-simulator-version-min=16.0"
+    else
+        target_sdk="iphoneos"
+        target_platform="arm64"
+        minos="-miphoneos-version-min=16.0"
+    # TODO: consider non-arm simulator?
+    fi
 
-  if [ "$target_arch" == "x86_64" ]; then
-     target_sdk="iphonesimulator"
-     target_arch="x86_64"
-     minos="-mios-simulator-version-min=13.0"
-  else
-     target_sdk="iphoneos"
-     target_arch="arm64"
-     minos="-miphoneos-version-min=13.0"
-  fi
+    # Note: unlike similar install-ffmpeg scripts, not $target_platform,
+    # but $1 (which can be arm64-simulator with arm64 target_platform).
+    local build_dir="$ffmpeg_source_dir/build_ios/$1"
+    sudo mkdir -p "$build_dir"
+    pushd "$build_dir"
 
-  local build_dir="$ffmpeg_source_dir/build_ios/$target_arch"
-  sudo mkdir -p "$build_dir"
-  pushd "$build_dir"
-
-  # shellcheck disable=SC2086
-  sudo "$ffmpeg_source_dir/configure" $ffmpeg_config_options \
+    # shellcheck disable=SC2086
+    sudo "$ffmpeg_source_dir/configure" $ffmpeg_config_options \
     --sysroot="$(xcrun --sdk "$target_sdk" --show-sdk-path)" \
-  --enable-cross-compile \
-  --enable-optimizations \
-  --prefix=$prefix \
-  --arch=$target_arch \
-  --cc="xcrun --sdk ${target_sdk} clang -arch $target_arch" \
-  --cxx="xcrun --sdk ${target_sdk} clang++ -arch $target_arch" \
-  --ar="$(xcrun --sdk ${target_sdk} --find ar)" \
-  --ranlib="$(xcrun --sdk ${target_sdk} --find ranlib)" \
-  --strip="$(xcrun --sdk ${target_sdk} --find strip)" \
-  --nm="$(xcrun --sdk ${target_sdk} --find nm)" \
-  --target-os=darwin \
-  --extra-cflags="$minos" \
-  --extra-cxxflags="$minos" \
-  --enable-cross-compile \
-  --enable-shared \
-  --disable-static \
-  --install-name-dir='@rpath/Frameworks' \
-  --enable-swscale \
-  --enable-pthreads \
-  --disable-audiotoolbox
+    --enable-cross-compile \
+    --enable-optimizations \
+    --prefix=$prefix \
+    --arch=$target_platform \
+    --cc="xcrun --sdk ${target_sdk} clang -arch $target_platform" \
+    --cxx="xcrun --sdk ${target_sdk} clang++ -arch $target_platform" \
+    --ar="$(xcrun --sdk ${target_sdk} --find ar)" \
+    --ranlib="$(xcrun --sdk ${target_sdk} --find ranlib)" \
+    --strip="$(xcrun --sdk ${target_sdk} --find strip)" \
+    --nm="$(xcrun --sdk ${target_sdk} --find nm)" \
+    --target-os=darwin \
+    --extra-ldflags="$minos" \
+    --enable-cross-compile \
+    --enable-shared \
+    --disable-static \
+    --install-name-dir='@rpath' \
+    --enable-swscale \
+    --enable-pthreads \
+    --disable-audiotoolbox
 
-  sudo make install DESTDIR="$build_dir/installed" -j4
-  popd
+    sudo make install DESTDIR="$build_dir/installed" -j4
+    popd
 }
 
 install_ffmpeg() {
@@ -98,11 +99,106 @@ install_ffmpeg() {
         popd >/dev/null
     done
     sudo cp -r $1$prefix/include $prefix
-    echo "LS done."
 }
 
-build_ffmpeg_ios "x86_64"
+build_info_plist() {
+    local file_path="$1"
+    local framework_name="$2"
+    local framework_id="$3"
+
+    local minimum_version_key="MinimumOSVersion"
+    local minimum_os_version="16.0"
+    local supported_platforms="iPhoneOS"
+
+    info_plist="<?xml version=\"1.0\" encoding=\"UTF-8\"?>
+<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">
+<plist version=\"1.0\">
+<dict>
+    <key>CFBundleDevelopmentRegion</key>
+    <string>en</string>
+    <key>CFBundleExecutable</key>
+    <string>${framework_name}</string>
+    <key>CFBundleIdentifier</key>
+    <string>${framework_id}</string>
+    <key>CFBundleInfoDictionaryVersion</key>
+    <string>6.0</string>
+    <key>CFBundleName</key>
+    <string>${framework_name}</string>
+    <key>CFBundlePackageType</key>
+    <string>FMWK</string>
+    <key>CFBundleShortVersionString</key>
+    <string>7.0.2</string>
+    <key>CFBundleVersion</key>
+    <string>7.0.2</string>
+    <key>CFBundleSignature</key>
+    <string>????</string>
+    <key>${minimum_version_key}</key>
+    <string>${minimum_os_version}</string>
+    <key>CFBundleSupportedPlatforms</key>
+    <array>
+        <string>${supported_platforms}</string>
+    </array>
+    <key>NSPrincipalClass</key>
+    <string></string>
+</dict>
+</plist>"
+    echo $info_plist | sudo tee ${file_path} 1>/dev/null
+}
+
+create_framework() {
+    # Create a 'traditional' framework from the corresponding dylib.
+    local framework_name="$1"
+    local platform="$2" # For now it's either arm64 or arm64-simulator, see below.
+    local ffmpeg_library_path="$ffmpeg_source_dir/build_ios/${platform}/installed/usr/local/ios/ffmpeg"
+    local framework_complete_path="${ffmpeg_library_path}/framework/${framework_name}.framework/${framework_name}"
+
+    sudo mkdir -p "${ffmpeg_library_path}/framework/${framework_name}.framework"
+    sudo cp "${ffmpeg_library_path}/lib/${framework_name}.dylib" "${ffmpeg_library_path}/framework/${framework_name}.framework/${framework_name}"
+
+    # Fix LC_ID_DYLIB (to be libavcodec.framework/libavcodec instead of @rpath/libavcodec.xx.yy.dylib
+    sudo install_name_tool -id @rpath/${framework_name}.framework/${framework_name} "${framework_complete_path}"
+
+    build_info_plist "${ffmpeg_library_path}/framework/${framework_name}.framework/Info.plist" "${framework_name}" "io.qt.ffmpegkit."${framework_name}
+
+    # Fix all FFmpeg-related LC_LOAD_DYLIB, similar to how we fixed LC_ID_DYLIB above:
+    otool -L "$framework_complete_path" | awk '/\t/ {print $1}' | egrep "$dylib_regex" | while read -r dependency_path; do
+        found_name=$(tmp=${dependency_path/*\/}; echo ${tmp/\.*})
+        if [ "$found_name" != "$framework_name" ]
+        then
+            sudo install_name_tool -change "$dependency_path" @rpath/${found_name}.framework/${found_name} "${framework_complete_path}"
+        fi
+    done
+    #sudo mkdir -p "$prefix/framework/"
+    #sudo cp -r "${ffmpeg_library_path}/framework/${framework_name}.framework" "$prefix/framework/"
+}
+
+create_xcframework() {
+    # Create 'traditional' framework from the corresponding dylib,
+    # also creating
+    local framework_name="$1"
+
+    local fw1="$ffmpeg_source_dir/build_ios/arm64/installed/usr/local/ios/ffmpeg/framework/${framework_name}.framework"
+    local fw2="$ffmpeg_source_dir/build_ios/arm64-simulator/installed/usr/local/ios/ffmpeg/framework/${framework_name}.framework"
+
+    sudo mkdir -p "$prefix/framework/"
+    sudo xcodebuild -create-xcframework -framework $fw1 -framework $fw2 -output "${prefix}/framework/${framework_name}.xcframework"
+}
+
+build_ffmpeg_ios "arm64-simulator"
 build_ffmpeg_ios "arm64"
 
-install_ffmpeg "$ffmpeg_source_dir/build_ios/x86_64/installed" "$ffmpeg_source_dir/build_ios/arm64/installed"
+ffmpeg_libs="libavcodec libavdevice libavfilter libavformat libavutil libswresample libswscale"
+
+for name in $ffmpeg_libs; do
+    create_framework $name "arm64"
+    create_framework $name "arm64-simulator"
+done
+
+# Create corresponding (xc)frameworks containing both arm64 and arm64-simulator frameworks:
+for name in $ffmpeg_libs; do
+    create_xcframework $name
+done
+
+install_ffmpeg "$ffmpeg_source_dir/build_ios/arm64/installed"
+
 SetEnvVar "FFMPEG_DIR_IOS" $prefix