From 59d087adf5f1b09a2d18445ede5a1f5b7b7e6c90 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Sat, 28 Jul 2018 00:25:52 -0700
Subject: [PATCH] Add function for querying maximum supported streaming frame
 rate

---
 app/settings/streamingpreferences.cpp | 26 ++++++++++++++++++++++++++
 app/settings/streamingpreferences.h   |  2 ++
 2 files changed, 28 insertions(+)

diff --git a/app/settings/streamingpreferences.cpp b/app/settings/streamingpreferences.cpp
index 1b499c82..2d37252b 100644
--- a/app/settings/streamingpreferences.cpp
+++ b/app/settings/streamingpreferences.cpp
@@ -67,6 +67,32 @@ bool StreamingPreferences::hasAnyHardwareAcceleration()
                                               1920, 1080, 60);
 }
 
+int StreamingPreferences::getMaximumStreamingFrameRate()
+{
+    // Never let the maximum drop below 60 FPS
+    int maxFrameRate = 60;
+
+    if (SDL_InitSubSystem(SDL_INIT_VIDEO) != 0) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+                     "SDL_InitSubSystem(SDL_INIT_VIDEO) failed: %s",
+                     SDL_GetError());
+        return maxFrameRate;
+    }
+
+    for (int i = 0; i < SDL_GetNumVideoDisplays(); i++) {
+        SDL_DisplayMode mode;
+        if (SDL_GetCurrentDisplayMode(i, &mode) == 0) {
+            // Cap the frame rate at 90 FPS, since I can't seem to get
+            // much more out of GFE even with the game rendering at > 300 FPS.
+            maxFrameRate = qMax(maxFrameRate, qMin(90, mode.refresh_rate));
+        }
+    }
+
+    SDL_QuitSubSystem(SDL_INIT_VIDEO);
+
+    return maxFrameRate;
+}
+
 int StreamingPreferences::getDefaultBitrate(int width, int height, int fps)
 {
     if (width * height * fps <=  1280 * 720 * 30) {
diff --git a/app/settings/streamingpreferences.h b/app/settings/streamingpreferences.h
index b622758d..8ec44d36 100644
--- a/app/settings/streamingpreferences.h
+++ b/app/settings/streamingpreferences.h
@@ -16,6 +16,8 @@ public:
 
     Q_INVOKABLE static bool hasAnyHardwareAcceleration();
 
+    Q_INVOKABLE static int getMaximumStreamingFrameRate();
+
     void reload();
 
     enum AudioConfig