Patch ffmpeg wrap to compile with simd extensions

This is very hacky and only intended to get these extensions working on
the Windows CI builds.

.github/workflows/ci.yml

@@ -83,7 +83,7 @@ jobs:
       - name: Install dependencies (Windows)
         if: matrix.config.os == 'windows-latest'
         run: |
-          choco install ninja innosetup
+          choco install ninja innosetup yasm
           $url = "https://github.com/leafo/moonscript/releases/download/win32-v0.5.0/moonscript-187bac54ee5a7450013e9c38e005a0e671b76f45.zip"
           mkdir moonscript
           Invoke-WebRequest -Uri $url -OutFile ".\moonscript\moonscript.zip"

subprojects/ffmpeg.wrap

@@ -2,6 +2,7 @@
 directory = ffmpeg
 url = https://gitlab.freedesktop.org/gstreamer/meson-ports/ffmpeg.git
 revision = meson-4.4
+patch_directory = ffmpeg
 
 [provide]
 libavformat = libavformat_dep

subprojects/packagefiles/ffmpeg/libavutil/x86/meson.build

@@ -0,0 +1,31 @@
+libavutil_x86_sources = files(
+  'cpu.c',
+  'fixed_dsp_init.c',
+  'float_dsp_init.c',
+  'imgutils_init.c',
+  'lls_init.c',
+)
+
+libavutil_x86_optional_sources = {
+  'pixelutils' : files('pixelutils_init.c'),
+}
+
+libavutil_x86_x86asm_sources = files(
+  'cpuid.asm',
+  'emms.asm',
+  'fixed_dsp.asm',
+  'float_dsp.asm',
+  'imgutils.asm',
+  'lls.asm',
+)
+
+libavutil_x86_x86asm_optional_sources = {
+  'pixelutils' : files('pixelutils.asm'),
+}
+
+libavutil_x86_mmx_optional_sources = {
+}
+
+libavutil_x86_optional_tests = {
+}
+