CI: Add build and test FFmpeg+libvmaf on Windows (MSVC)

Author: StormBytePP

.github/workflows/ffmpeg.yml

@@ -16,9 +16,15 @@ jobs:
           - os: ubuntu-latest
             CC: gcc
             CXX: g++
+            ffmpeg_build: autotools
           - os: macos-latest
             CC: clang
             CXX: clang++
+            ffmpeg_build: autotools
+          - os: windows-latest
+            CC: cl
+            CXX: cl
+            ffmpeg_build: meson
     runs-on: ${{ matrix.os }}
     env:
       CC: ${{ matrix.CC }}
@@ -31,7 +37,7 @@ jobs:
       - name: Install meson and ninja
         run: |
           python -m pip install --upgrade pip
-          pip install meson
+          pip install meson ninja
       - name: Install dependencies (ubuntu)
         if: matrix.os == 'ubuntu-latest'
         run: |
@@ -41,20 +47,70 @@ jobs:
         if: matrix.os == 'macos-latest'
         run: |
           brew install -q ninja nasm
+      - name: Setup MSVC
+        if: matrix.os == 'windows-latest'
+        uses: ilammy/msvc-dev-cmd@v1
       - uses: actions/checkout@v6
-      - name: Build vmaf
+      - name: Install pkg-config (Windows)
+        if: matrix.os == 'windows-latest'
+        run: |
+          choco install pkgconfiglite -y
+      - name: Build vmaf (unix)
+        if: matrix.os != 'windows-latest'
         run: |
           meson setup libvmaf libvmaf/build --buildtype release
+          meson compile -C libvmaf/build
           sudo ninja -vC libvmaf/build install
-      - name: Prepare FFmpeg
+      - name: Build vmaf (MSVC)
+        if: matrix.os == 'windows-latest'
+        run: |
+          meson setup libvmaf libvmaf/build --buildtype release --default-library static --prefix "C:/vmaf"
+          meson compile -C libvmaf/build
+          meson install -C libvmaf/build
+      - name: Rename static libs to .lib for MSVC
+        if: matrix.os == 'windows-latest'
+        shell: pwsh
+        run: |
+          Rename-Item -Path C:\vmaf\lib\libpthreadVC3.a  -NewName libpthreadVC3.lib
+          Rename-Item -Path C:\vmaf\lib\libpthreadVCE3.a -NewName libpthreadVCE3.lib
+          Rename-Item -Path C:\vmaf\lib\libpthreadVSE3.a -NewName libpthreadVSE3.lib
+          Rename-Item -Path C:\vmaf\lib\libvmaf.a        -NewName libvmaf.lib
+      - name: Add libvmaf to MSVC paths
+        if: matrix.os == 'windows-latest'
+        run: |
+          echo "INCLUDE=C:/vmaf/include;$env:INCLUDE" >> $env:GITHUB_ENV
+          echo "LIB=C:/vmaf/lib;$env:LIB" >> $env:GITHUB_ENV
+          echo "PATH=C:/vmaf/bin;$env:PATH" >> $env:GITHUB_ENV
+      - name: Add libvmaf to pkg-config path
+        if: matrix.os == 'windows-latest'
+        run: |
+          echo "PKG_CONFIG_PATH=C:/vmaf/lib/pkgconfig;$env:PKG_CONFIG_PATH" >> $env:GITHUB_ENV
+      - name: Prepare FFmpeg (autotools)
+        if: matrix.ffmpeg_build == 'autotools'
         run: |
           git clone -q --branch master --depth=1 "https://github.com/FFmpeg/FFmpeg" ffmpeg
           cd ffmpeg
           ./configure --enable-version3 --enable-libvmaf --disable-indevs --cc="$CC" --cxx="$CXX" || { less ffbuild/config.log; exit 1; }
-      - name: Make FFmpeg
+      - name: Make FFmpeg (autotools)
+        if: matrix.ffmpeg_build == 'autotools'
         run: |
           sudo make -C ffmpeg --quiet -j $(getconf _NPROCESSORS_ONLN 2>/dev/null || sysctl -n hw.ncpu) install
+      - name: Clone FFmpeg Meson port
+        if: matrix.ffmpeg_build == 'meson'
+        run: |
+          git clone --depth=1 https://gitlab.freedesktop.org/gstreamer/meson-ports/ffmpeg.git ffmpeg-meson
+      - name: Configure FFmpeg (Meson)
+        if: matrix.ffmpeg_build == 'meson'
+        run: |
+          cd ffmpeg-meson
+          meson setup build --buildtype release -Dlibvmaf=enabled
+      - name: Build FFmpeg (Meson)
+        if: matrix.ffmpeg_build == 'meson'
+        run: |
+          meson compile -C ffmpeg-meson/build
+          meson install -C ffmpeg-meson/build
       - name: Test ffmpeg
+        if: matrix.ffmpeg_build == 'autotools'
         run: |
           curl "https://gist.githubusercontent.com/1480c1/0c4575da638ef6e8203feffd0597de16/raw/akiyo_cif.tar.xz.base64" | base64 -d | tar xJ
           vmaf_score=$(ffmpeg -hide_banner -nostats -i encoded.mkv -i orig.mkv -filter_complex libvmaf -f null - 2>&1 | grep 'VMAF score' | tr ' ' '\n' | tail -n1)
@@ -66,4 +122,17 @@ jobs:
             echo "vmaf score matches"
             exit 0
           fi
-        continue-on-error: true
+      - name: Test ffmpeg (MSVC)
+        if: matrix.ffmpeg_build == 'meson'
+        run: |
+          curl "https://gist.githubusercontent.com/1480c1/0c4575da638ef6e8203feffd0597de16/raw/akiyo_cif.tar.xz.base64" | base64 -d | tar xJ
+          vmaf_score=$("C:/Program Files/ffmpeg/bin/ffmpeg.exe" -hide_banner -nostats -i encoded.mkv -i orig.mkv -filter_complex libvmaf -f null - 2>&1 | Select-String "VMAF score" | ForEach-Object { $_.ToString().Split()[-1] })
+          echo $vmaf_score
+          if ($vmaf_score -ne "93.663925") {
+            echo "vmaf score doesn't match 93.663925"
+            exit 1
+          } else {
+            echo "vmaf score matches"
+            exit 0
+          }
+        continue-on-error: true