System: Fix inverted volume selection

src/core/system.cpp

@@ -2995,7 +2995,7 @@ GPUVSyncMode System::GetEffectiveVSyncMode()
 bool System::ShouldAllowPresentThrottle()
 {
   const bool valid_vm = (s_state != State::Shutdown && s_state != State::Stopping);
-  return !valid_vm || !IsRunningAtNonStandardSpeed();
+  return !valid_vm || IsRunningAtNonStandardSpeed();
 }
 
 bool System::IsFastForwardEnabled()
@@ -4633,7 +4633,7 @@ bool System::IsRunningAtNonStandardSpeed()
   if (!IsValid())
     return false;
 
-  return (s_target_speed == 1.0f || s_syncing_to_host);
+  return (s_target_speed != 1.0f && !s_syncing_to_host);
 }
 
 s32 System::GetAudioOutputVolume()

src/duckstation-qt/audiosettingswidget.ui

@@ -188,7 +188,7 @@
            <number>50</number>
           </property>
           <property name="orientation">
-           <enum>Qt::Horizontal</enum>
+           <enum>Qt::Orientation::Horizontal</enum>
           </property>
           <property name="tickPosition">
            <enum>QSlider::TickPosition::TicksBothSides</enum>
@@ -272,6 +272,13 @@
         </item>
        </layout>
       </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_4">
+        <property name="text">
+         <string>Fast Forward Volume:</string>
+        </property>
+       </widget>
+      </item>
       <item row="1" column="1">
        <layout class="QHBoxLayout" name="horizontalLayout_2">
         <item>
@@ -321,26 +328,23 @@
         </item>
        </layout>
       </item>
-      <item row="1" column="0">
-       <widget class="QLabel" name="label_4">
-        <property name="text">
-         <string>Fast Forward Volume:</string>
-        </property>
-       </widget>
-      </item>
-      <item row="2" column="0">
-       <widget class="QCheckBox" name="muted">
-        <property name="text">
-         <string>Mute All Sound</string>
-        </property>
-       </widget>
-      </item>
-      <item row="3" column="0">
-       <widget class="QCheckBox" name="muteCDAudio">
-        <property name="text">
-         <string>Mute CD Audio</string>
-        </property>
-       </widget>
+      <item row="2" column="0" colspan="2">
+       <layout class="QGridLayout" name="gridLayout_2">
+        <item row="0" column="0">
+         <widget class="QCheckBox" name="muted">
+          <property name="text">
+           <string>Mute All Sound</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QCheckBox" name="muteCDAudio">
+          <property name="text">
+           <string>Mute CD Audio</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
       </item>
      </layout>
     </widget>