Add option to statically compile ffmpeg from source

1 files changed, 35 insertions, 0 deletions

diff --git a/subprojects/packagefiles/ffmpeg/meson.build b/subprojects/packagefiles/ffmpeg/meson.build
new file mode 100644
index 0000000..38df7e9
--- /dev/null
+++ b/subprojects/packagefiles/ffmpeg/meson.build
@@ -0,0 +1,35 @@
+project('ffmpeg', 'c', version : '8.1')
+
+# Neither ffmpeg nor the libraries it depends on use meson, so they are built with their
+# own build systems into a shared prefix and then exposed to gpu-screen-recorder as
+# regular pkg-config dependencies.
+
+install_prefix = meson.current_build_dir() / 'install'
+c_compiler = ' '.join(meson.get_compiler('c').cmd_array())
+build_library = find_program(meson.global_source_root() / 'extra' / 'build_ffmpeg.sh')
+
+# srt links against openssl and ffmpeg links against all of them, so the order matters.
+libraries = ['nv-codec-headers', 'x264', 'opus', 'openssl', 'srt', 'ffmpeg']
+
+foreach library : libraries
+    source_dir = library == 'ffmpeg' ? meson.current_source_dir() : subproject(library).get_variable('source_dir')
+    build_result = run_command(build_library, library, source_dir, meson.current_build_dir() / library, install_prefix, c_compiler, check : true)
+    if build_result.stderr().strip() != ''
+        message(build_result.stderr().strip())
+    endif
+endforeach
+
+ffmpeg_libs = ['libavformat', 'libavfilter', 'libavcodec', 'libswresample', 'libavutil']
+
+pkgconfig = find_program('pkg-config')
+pkgconfig_env = environment()
+pkgconfig_env.prepend('PKG_CONFIG_PATH', install_prefix / 'lib' / 'pkgconfig')
+
+ffmpeg_cflags = run_command(pkgconfig, '--cflags', ffmpeg_libs, env : pkgconfig_env, check : true).stdout().split()
+ffmpeg_ldflags = run_command(pkgconfig, '--static', '--libs', ffmpeg_libs, env : pkgconfig_env, check : true).stdout().split()
+
+ffmpeg_dep = declare_dependency(compile_args : ffmpeg_cflags, link_args : ffmpeg_ldflags)
+
+foreach ffmpeg_lib : ffmpeg_libs
+    meson.override_dependency(ffmpeg_lib, ffmpeg_dep)
+endforeach