configure_graphics: Add GPU nvdec decoding as an option

Some system configurations may see visual regressions or lower performance using GPU decoding compared to CPU decoding. This setting provides the option for users to specify their decoding preference.

Co-Authored-By: yzct12345 <87620833+yzct12345@users.noreply.github.com>

2 files changed, 7 insertions, 2 deletions

diff --git a/src/video_core/command_classes/codecs/codec.cpp b/src/video_core/command_classes/codecs/codec.cpp
index 18aa40ca3..61966cbfe 100644
--- a/src/video_core/command_classes/codecs/codec.cpp
+++ b/src/video_core/command_classes/codecs/codec.cpp
@@ -5,6 +5,7 @@
 #include <fstream>
 #include <vector>
 #include "common/assert.h"
+#include "common/settings.h"
 #include "video_core/command_classes/codecs/codec.h"
 #include "video_core/command_classes/codecs/h264.h"
 #include "video_core/command_classes/codecs/vp9.h"
@@ -142,8 +143,11 @@ void Codec::Initialize() {
         }
     }();
     av_codec = avcodec_find_decoder(codec);
+
     InitializeAvCodecContext();
-    InitializeGpuDecoder();
+    if (Settings::values.nvdec_emulation.GetValue() == Settings::NvdecEmulation::GPU) {
+        InitializeGpuDecoder();
+    }
     if (const int res = avcodec_open2(av_codec_ctx, av_codec, nullptr); res < 0) {
         LOG_ERROR(Service_NVDRV, "avcodec_open2() Failed with result {}", res);
         avcodec_free_context(&av_codec_ctx);
diff --git a/src/video_core/video_core.cpp b/src/video_core/video_core.cpp
index 3b575db4d..cae543a51 100644
--- a/src/video_core/video_core.cpp
+++ b/src/video_core/video_core.cpp
@@ -37,7 +37,8 @@ std::unique_ptr<VideoCore::RendererBase> CreateRenderer(
 namespace VideoCore {
 
 std::unique_ptr<Tegra::GPU> CreateGPU(Core::Frontend::EmuWindow& emu_window, Core::System& system) {
-    const bool use_nvdec = Settings::values.use_nvdec_emulation.GetValue();
+    const auto nvdec_value = Settings::values.nvdec_emulation.GetValue();
+    const bool use_nvdec = nvdec_value != Settings::NvdecEmulation::Off;
     const bool use_async = Settings::values.use_asynchronous_gpu_emulation.GetValue();
     auto gpu = std::make_unique<Tegra::GPU>(system, use_async, use_nvdec);
     auto context = emu_window.CreateSharedContext();