Increase Qt video transfer buffer size to further reduce possibility of buffer overrun when transfering frames from emulation to GUI threads. Added input device update code to emulation frame finished callback to ensure that input devices are always updated before screen is redrawn.

src/drivers/Qt/ConsoleWindow.cpp

@@ -4270,6 +4270,12 @@ void consoleWin_t::transferVideoBuffer(void)
 
 void consoleWin_t::emuFrameFinish(void)
 {
+	// Process all events before attempting to render viewport
+	QCoreApplication::processEvents();
+
+	// Update Input Devices
+	FCEUD_UpdateInput();
+	
 	//printf("EMU Frame Finish\n");
 
 	transferVideoBuffer();

src/drivers/Qt/nes_shm.h

@@ -11,7 +11,7 @@
 
 #define  GL_NES_WIDTH   256
 #define  GL_NES_HEIGHT  240
-#define  NES_VIDEO_BUFLEN   3
+#define  NES_VIDEO_BUFLEN   5
 #define  NES_AUDIO_BUFLEN   480000
 
 struct  nes_shm_t