1 files changed, 216 insertions, 2 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 18d553f4d..a810e11c2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -514,7 +514,7 @@ if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
 endif()
 if (NOT YUZU_USE_BUNDLED_FFMPEG)
     # Use system installed FFmpeg
-    find_package(FFmpeg 4.3 QUIET COMPONENTS ${FFmpeg_COMPONENTS})
+    find_package(FFmpeg QUIET COMPONENTS ${FFmpeg_COMPONENTS})
 
     if (FFmpeg_FOUND)
         # Overwrite aggregate defines from FFmpeg module to avoid over-linking libraries.
@@ -527,11 +527,225 @@ if (NOT YUZU_USE_BUNDLED_FFMPEG)
             set(FFmpeg_INCLUDE_DIR ${FFmpeg_INCLUDE_DIR} ${FFmpeg_INCLUDE_${COMPONENT}} CACHE PATH "Path to FFmpeg headers" FORCE)
         endforeach()
     else()
-        message(WARNING "FFmpeg not found or too old, falling back to externals")
+        message(WARNING "FFmpeg not found, falling back to externals")
         set(YUZU_USE_BUNDLED_FFMPEG ON)
     endif()
 endif()
 
+if (YUZU_USE_BUNDLED_FFMPEG)
+    if (NOT WIN32)
+        # TODO(lat9nq): Move this to externals/ffmpeg/CMakeLists.txt (and move externals/ffmpeg to
+        # externals/ffmpeg/ffmpeg)
+
+        # Build FFmpeg from externals
+        message(STATUS "Using FFmpeg from externals")
+
+        # FFmpeg has source that requires one of nasm or yasm to assemble it.
+        # REQUIRED throws an error if not found here during configuration rather than during compilation.
+        find_program(ASSEMBLER NAMES nasm yasm)
+        if ("${ASSEMBLER}" STREQUAL "ASSEMBLER-NOTFOUND")
+            message(FATAL_ERROR "One of either `nasm` or `yasm` not found but is required.")
+        endif()
+
+        find_program(AUTOCONF autoconf)
+        if ("${AUTOCONF}" STREQUAL "AUTOCONF-NOTFOUND")
+            message(FATAL_ERROR "Required program `autoconf` not found.")
+        endif()
+
+        set(FFmpeg_PREFIX ${PROJECT_SOURCE_DIR}/externals/ffmpeg)
+        set(FFmpeg_BUILD_DIR ${PROJECT_BINARY_DIR}/externals/ffmpeg)
+        set(FFmpeg_MAKEFILE ${FFmpeg_BUILD_DIR}/Makefile)
+        make_directory(${FFmpeg_BUILD_DIR})
+
+        # Read version string from external
+        file(READ ${FFmpeg_PREFIX}/RELEASE FFmpeg_VERSION)
+        set(FFmpeg_FOUND NO)
+        if (NOT FFmpeg_VERSION STREQUAL "")
+            set(FFmpeg_FOUND YES)
+        endif()
+
+        unset(FFmpeg_LIBRARIES CACHE)
+        foreach(COMPONENT ${FFmpeg_COMPONENTS})
+            set(FFmpeg_${COMPONENT}_PREFIX "${FFmpeg_BUILD_DIR}/lib${COMPONENT}")
+            set(FFmpeg_${COMPONENT}_LIB_NAME "lib${COMPONENT}.a")
+            set(FFmpeg_${COMPONENT}_LIBRARY "${FFmpeg_${COMPONENT}_PREFIX}/${FFmpeg_${COMPONENT}_LIB_NAME}")
+
+            set(FFmpeg_LIBRARIES
+                ${FFmpeg_LIBRARIES}
+                ${FFmpeg_${COMPONENT}_LIBRARY}
+                CACHE PATH "Paths to FFmpeg libraries" FORCE)
+        endforeach()
+
+        Include(FindPkgConfig REQUIRED)
+        pkg_check_modules(LIBVA libva)
+        pkg_check_modules(CUDA cuda)
+        pkg_check_modules(FFNVCODEC ffnvcodec)
+        pkg_check_modules(VDPAU vdpau)
+
+        set(FFmpeg_HWACCEL_LIBRARIES)
+        set(FFmpeg_HWACCEL_FLAGS)
+        set(FFmpeg_HWACCEL_INCLUDE_DIRS)
+        set(FFmpeg_HWACCEL_LDFLAGS)
+
+        if(LIBVA_FOUND)
+            pkg_check_modules(LIBDRM libdrm REQUIRED)
+            find_package(X11 REQUIRED)
+            pkg_check_modules(LIBVA-DRM libva-drm REQUIRED)
+            pkg_check_modules(LIBVA-X11 libva-x11 REQUIRED)
+            list(APPEND FFmpeg_HWACCEL_LIBRARIES
+                ${LIBDRM_LIBRARIES}
+                ${X11_LIBRARIES}
+                ${LIBVA-DRM_LIBRARIES}
+                ${LIBVA-X11_LIBRARIES}
+                ${LIBVA_LIBRARIES})
+            set(FFmpeg_HWACCEL_FLAGS
+                --enable-hwaccel=h264_vaapi
+                --enable-hwaccel=vp8_vaapi
+                --enable-hwaccel=vp9_vaapi
+                --enable-libdrm)
+            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS
+                ${LIBDRM_INCLUDE_DIRS}
+                ${X11_INCLUDE_DIRS}
+                ${LIBVA-DRM_INCLUDE_DIRS}
+                ${LIBVA-X11_INCLUDE_DIRS}
+                ${LIBVA_INCLUDE_DIRS}
+            )
+            message(STATUS "VA-API found")
+        else()
+            set(FFmpeg_HWACCEL_FLAGS --disable-vaapi)
+        endif()
+
+        if (FFNVCODEC_FOUND AND CUDA_FOUND)
+            list(APPEND FFmpeg_HWACCEL_FLAGS
+                --enable-cuvid
+                --enable-ffnvcodec
+                --enable-nvdec
+                --enable-hwaccel=h264_nvdec
+                --enable-hwaccel=vp8_nvdec
+                --enable-hwaccel=vp9_nvdec
+                --extra-cflags=-I${CUDA_INCLUDE_DIRS}
+            )
+            list(APPEND FFmpeg_HWACCEL_LIBRARIES
+                ${FFNVCODEC_LIBRARIES}
+                ${CUDA_LIBRARIES}
+            )
+            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS
+                ${FFNVCODEC_INCLUDE_DIRS}
+                ${CUDA_INCLUDE_DIRS}
+            )
+            list(APPEND FFmpeg_HWACCEL_LDFLAGS
+                ${FFNVCODEC_LDFLAGS}
+                ${CUDA_LDFLAGS}
+            )
+            message(STATUS "ffnvcodec libraries version ${FFNVCODEC_VERSION} found")
+        endif()
+
+        if (VDPAU_FOUND)
+            list(APPEND FFmpeg_HWACCEL_FLAGS
+                --enable-vdpau
+                --enable-hwaccel=h264_vdpau
+                --enable-hwaccel=vp9_vdpau
+            )
+            list(APPEND FFmpeg_HWACCEL_LIBRARIES ${VDPAU_LIBRARIES})
+            list(APPEND FFmpeg_HWACCEL_INCLUDE_DIRS ${VDPAU_INCLUDE_DIRS})
+            list(APPEND FFmpeg_HWACCEL_LDFLAGS ${VDPAU_LDFLAGS})
+            message(STATUS "vdpau libraries version ${VDPAU_VERSION} found")
+        else()
+            list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vdpau)
+        endif()
+
+        # `configure` parameters builds only exactly what yuzu needs from FFmpeg
+        # `--disable-vdpau` is needed to avoid linking issues
+        add_custom_command(
+            OUTPUT
+                ${FFmpeg_MAKEFILE}
+            COMMAND
+                /bin/bash ${FFmpeg_PREFIX}/configure
+                    --disable-avdevice
+                    --disable-avfilter
+                    --disable-avformat
+                    --disable-doc
+                    --disable-everything
+                    --disable-ffmpeg
+                    --disable-ffprobe
+                    --disable-network
+                    --disable-postproc
+                    --disable-swresample
+                    --enable-decoder=h264
+                    --enable-decoder=vp8
+                    --enable-decoder=vp9
+                    --cc="${CMAKE_C_COMPILER}"
+                    --cxx="${CMAKE_CXX_COMPILER}"
+                    ${FFmpeg_HWACCEL_FLAGS}
+            WORKING_DIRECTORY
+                ${FFmpeg_BUILD_DIR}
+        )
+        unset(FFmpeg_HWACCEL_FLAGS)
+
+        # Workaround for Ubuntu 18.04's older version of make not being able to call make as a child
+        # with context of the jobserver. Also helps ninja users.
+        execute_process(
+            COMMAND
+                nproc
+            OUTPUT_VARIABLE
+                SYSTEM_THREADS)
+
+        set(FFmpeg_BUILD_LIBRARIES ${FFmpeg_LIBRARIES})
+        add_custom_command(
+            OUTPUT
+                ${FFmpeg_BUILD_LIBRARIES}
+            COMMAND
+                make -j${SYSTEM_THREADS}
+            WORKING_DIRECTORY
+                ${FFmpeg_BUILD_DIR}
+        )
+
+        set(FFmpeg_INCLUDE_DIR
+            "${FFmpeg_PREFIX};${FFmpeg_BUILD_DIR};${FFmpeg_HWACCEL_INCLUDE_DIRS}"
+            CACHE PATH "Path to FFmpeg headers" FORCE)
+
+        set(FFmpeg_LDFLAGS
+            "${FFmpeg_HWACCEL_LDFLAGS}"
+            CACHE STRING "FFmpeg linker flags" FORCE)
+
+        # ALL makes this custom target build every time
+        # but it won't actually build if the DEPENDS parameter is up to date
+        add_custom_target(ffmpeg-configure ALL DEPENDS ${FFmpeg_MAKEFILE})
+        add_custom_target(ffmpeg-build ALL DEPENDS ${FFmpeg_BUILD_LIBRARIES} ffmpeg-configure)
+        link_libraries(${FFmpeg_LIBVA_LIBRARIES})
+        set(FFmpeg_LIBRARIES ${FFmpeg_BUILD_LIBRARIES} ${FFmpeg_HWACCEL_LIBRARIES}
+            CACHE PATH "Paths to FFmpeg libraries" FORCE)
+        unset(FFmpeg_BUILD_LIBRARIES)
+        unset(FFmpeg_HWACCEL_FLAGS)
+        unset(FFmpeg_HWACCEL_INCLUDE_DIRS)
+        unset(FFmpeg_HWACCEL_LDFLAGS)
+        unset(FFmpeg_HWACCEL_LIBRARIES)
+
+        if (FFmpeg_FOUND)
+            message(STATUS "Found FFmpeg version ${FFmpeg_VERSION}")
+        else()
+            message(FATAL_ERROR "FFmpeg not found")
+        endif()
+    else() # WIN32
+        # Use yuzu FFmpeg binaries
+        set(FFmpeg_EXT_NAME "ffmpeg-4.4")
+        set(FFmpeg_PATH "${CMAKE_BINARY_DIR}/externals/${FFmpeg_EXT_NAME}")
+        download_bundled_external("ffmpeg/" ${FFmpeg_EXT_NAME} "")
+        set(FFmpeg_FOUND YES)
+        set(FFmpeg_INCLUDE_DIR "${FFmpeg_PATH}/include" CACHE PATH "Path to FFmpeg headers" FORCE)
+        set(FFmpeg_LIBRARY_DIR "${FFmpeg_PATH}/bin" CACHE PATH "Path to FFmpeg library directory" FORCE)
+        set(FFmpeg_LDFLAGS "" CACHE STRING "FFmpeg linker flags" FORCE)
+        set(FFmpeg_DLL_DIR "${FFmpeg_PATH}/bin" CACHE PATH "Path to FFmpeg dll's" FORCE)
+        set(FFmpeg_LIBRARIES
+            ${FFmpeg_LIBRARY_DIR}/swscale.lib
+            ${FFmpeg_LIBRARY_DIR}/avcodec.lib
+            ${FFmpeg_LIBRARY_DIR}/avutil.lib
+            CACHE PATH "Paths to FFmpeg libraries" FORCE)
+    endif()
+endif()
+
+unset(FFmpeg_COMPONENTS)
+
 # Prefer the -pthread flag on Linux.
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)