Enable FFmpeg GPU decoding for NVIDIA and AMD graphic cards (#139)

This enables the DXVA2, D3D11VA, D3D11VA2 and NVENC decoders for GPU decoding of H264 and VP9 formats on Windows.

Co-authored-by: MaranBr <maranbr@outlook.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/139

externals/ffmpeg/CMakeLists.txt

@@ -254,7 +254,7 @@ elseif(ANDROID)
     set(FFmpeg_INCLUDE_DIR "${FFmpeg_INCLUDE_DIR}" PARENT_SCOPE)
 elseif(WIN32)
     # Use yuzu FFmpeg binaries
-    set(FFmpeg_EXT_NAME "ffmpeg-7.0.3")
+    set(FFmpeg_EXT_NAME "ffmpeg-6.0.2")
     set(FFmpeg_PATH "${CMAKE_BINARY_DIR}/externals/${FFmpeg_EXT_NAME}")
     download_bundled_external("ffmpeg/" ${FFmpeg_EXT_NAME} "")
     set(FFmpeg_FOUND YES)

src/video_core/host1x/ffmpeg/ffmpeg.cpp

@@ -37,7 +37,6 @@ constexpr std::array PreferredGpuDecoders = {
     AV_HWDEVICE_TYPE_VAAPI,
     AV_HWDEVICE_TYPE_VDPAU,
 #endif
-    // last resort for Linux Flatpak (w/ NVIDIA)
     AV_HWDEVICE_TYPE_VULKAN,
 };
 
@@ -108,8 +107,7 @@ bool Decoder::SupportsDecodingOnDevice(AVPixelFormat* out_pix_fmt, AVHWDeviceTyp
                       av_hwdevice_get_type_name(type));
             break;
         }
-        if ((config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX) != 0 &&
-            config->device_type == type) {
+        if (config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX && config->device_type == type) {
             LOG_INFO(HW_GPU, "Using {} GPU decoder", av_hwdevice_get_type_name(type));
             *out_pix_fmt = config->pix_fmt;
             return true;