Try to build codecs on Windows too

.github/workflows/build.yml

@@ -8,15 +8,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v1
         with:
           python-version: 3.8
+      - name: Install yasm
+        if: matrix.os == 'windows-latest'
+        run: curl -L -o 'C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Tools\yasm.exe' http://www.tortall.net/projects/yasm/releases/yasm-1.3.0-win64.exe
       - name: Build codecs
         env:
           CIBW_BEFORE_BUILD: scripts/build-codecs /tmp/vendor
+          CIBW_BEFORE_BUILD_WINDOWS: scripts\build-codecs.bat C:\cibw\vendor
           CIBW_BUILD: cp38-*
           CIBW_TEST_COMMAND: python -c "import dummy"
         run: |

scripts/build-codecs.bat

@@ -0,0 +1,24 @@
+set destdir=%1
+
+set outputfile=output\codecs-win%PYTHON_ARCH%.tar.bz2
+if "%PYTHON_ARCH%" == "64" (
+    set triplet=x64-windows-static
+) else (
+    set triplet=x86-windows-static
+)
+
+vcpkg install libvpx:%triplet% opus:%triplet%
+
+if exist %destdir% (
+    rmdir /s /q %destdir%
+)
+mkdir %destdir%
+mkdir %destdir%\include
+mkdir %destdir%\lib
+xcopy C:\vcpkg\installed\%triplet%\include %destdir%\include\ /E
+xcopy C:\vcpkg\installed\%triplet%\lib %destdir%\lib\ /E
+
+if not exist output (
+    mkdir output
+)
+tar cjvf %outputfile% -C %destdir% include lib

setup.py

@@ -4,9 +4,11 @@
 if sys.platform == "win32":
     include_dirs = ["C:\\cibw\\vendor\\include"]
     library_dirs = ["C:\\cibw\\vendor\\lib"]
+    libraries = ["opus", "vpxmt"]
 else:
     include_dirs = ["/tmp/vendor/include"]
     library_dirs = ["/tmp/vendor/lib"]
+    libraries = ["opus", "vpx"]
 
 setuptools.setup(
     name="dummy",
@@ -17,7 +19,7 @@
             "dummy.binding",
             include_dirs=include_dirs,
             library_dirs=library_dirs,
-            libraries=["opus", "vpx",],
+            libraries=libraries,
             sources=["src/dummy/binding.c"],
         ),
     ],