Prefer H.264 for higher decoding performance in very high load situations

app/streaming/session.cpp

@@ -339,6 +339,16 @@ Session::Session(NvComputer* computer, NvApp& app)
                                           m_StreamConfig.width,
                                           m_StreamConfig.height,
                                           m_StreamConfig.fps);
+
+        // Oddly enough, the H.264 encoder on my GTX 1080 is actually more
+        // performant than the HEVC encoder (especially because split frame encode
+        // is disabled for HEVC by moonlight-common-c). Use H.264 for 1440p 100 FPS and above.
+        if (m_StreamConfig.width * m_StreamConfig.height * m_StreamConfig.fps >= 2560 * 1440 * 100) {
+            SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
+                        "Preferring H.264 for higher performance");
+            m_StreamConfig.supportsHevc = false;
+        }
+
         m_StreamConfig.enableHdr = false;
         break;
     case StreamingPreferences::VCC_FORCE_H264: