Added a timed pause state for use by the state history loader. When the user backs up to a previous state, give the option of temporarily pausing to give the user time to visually process the state before resuming game play. When in this state, an unpause count down can also be optionally shown on the upper left of the video display. Also, setting pause during this state down will cancel the count down and put the emulation into full pause. TODO add GUI config hooks to control video overlay and duration config options.

src/drawing.cpp

@@ -346,7 +346,7 @@ void FCEU_DrawRecordingStatus(uint8* XBuf)
 			hasPlayRecIcon = true;
 		}
 
-		if(FCEUI_EmulationPaused())
+		if( EmulationPaused & (EMULATIONPAUSED_PAUSED | EMULATIONPAUSED_TIMER) )
 			drawstatus(XBuf-ClipSidesOffset,3,28,hasPlayRecIcon?-16:0);
 	}
 }

src/driver.h

@@ -273,6 +273,8 @@ void FCEUI_ClearEmulationFrameStepped();
 void FCEUI_SetEmulationPaused(int val);
 ///toggles the paused bit (bit0) for EmulationPaused. caused FCEUD_DebugUpdate() to fire if the emulation pauses
 void FCEUI_ToggleEmulationPause();
+void FCEUI_PauseForDuration(int secs);
+int FCEUI_PauseFramesRemaining();
 
 //indicates whether input aids should be drawn (such as crosshairs, etc; usually in fullscreen mode)
 bool FCEUD_ShouldDrawInputAids();

src/fceu.cpp

@@ -116,6 +116,7 @@ bool movieSubtitles = true; //Toggle for displaying movie subtitles
 bool DebuggerWasUpdated = false; //To prevent the debugger from updating things without being updated.
 bool AutoResumePlay = false;
 char romNameWhenClosingEmulator[2048] = {0};
+static unsigned int pauseTimer = 0;
 
 
 FCEUGI::FCEUGI()
@@ -764,6 +765,22 @@ void FCEUI_Emulate(uint8 **pXBuf, int32 **SoundBuf, int32 *SoundBufSize, int ski
 #endif
 	}
 
+	if (EmulationPaused & EMULATIONPAUSED_TIMER)
+	{
+		if (pauseTimer > 0)
+		{
+			pauseTimer--;
+		}
+		else
+		{
+			EmulationPaused &= ~EMULATIONPAUSED_TIMER;
+		}
+		if (EmulationPaused & EMULATIONPAUSED_PAUSED)
+		{
+			EmulationPaused &= ~EMULATIONPAUSED_TIMER;
+		}
+	}
+
 	if (EmulationPaused & EMULATIONPAUSED_FA)
 	{
 		// the user is holding Frame Advance key
@@ -787,7 +804,7 @@ void FCEUI_Emulate(uint8 **pXBuf, int32 **SoundBuf, int32 *SoundBufSize, int ski
 			RefreshThrottleFPS();
 		}
 #endif
-		if (EmulationPaused & EMULATIONPAUSED_PAUSED)
+		if (EmulationPaused & (EMULATIONPAUSED_PAUSED | EMULATIONPAUSED_TIMER) )
 		{
 			// emulator is paused
 			memcpy(XBuf, XBackBuf, 256*256);
@@ -1263,6 +1280,33 @@ void FCEUI_FrameAdvance(void) {
 	frameAdvanceRequested = true;
 }
 
+void FCEUI_PauseForDuration(int secs)
+{
+	int framesPerSec;
+
+	// If already paused, do nothing
+	if (EmulationPaused & EMULATIONPAUSED_PAUSED)
+	{
+		return;
+	}
+
+	if (PAL || dendy)
+	{
+		framesPerSec = 50;
+	}
+	else
+	{
+		framesPerSec = 60;
+	}
+	pauseTimer = framesPerSec * secs;
+	EmulationPaused |= EMULATIONPAUSED_TIMER;
+}
+
+int FCEUI_PauseFramesRemaining(void)
+{
+	return (EmulationPaused & EMULATIONPAUSED_TIMER) ? pauseTimer : 0;
+}
+
 static int AutosaveCounter = 0;
 
 void UpdateAutosave(void) {

src/fceu.h

@@ -181,8 +181,9 @@ extern uint8 vsdip;
 
 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
 
-#define EMULATIONPAUSED_PAUSED 1
-#define EMULATIONPAUSED_FA 2
+#define EMULATIONPAUSED_PAUSED  0x01
+#define EMULATIONPAUSED_TIMER   0x02
+#define EMULATIONPAUSED_FA      0x04
 
 #define FRAMEADVANCE_DELAY_DEFAULT 10
 #define NES_HEADER_SIZE  16

src/state.cpp

@@ -1205,6 +1205,7 @@ class StateRecorder
 			lastState = ringHead;
 			loadIndexReset = false;
 			lastLoadFrame = 0;
+			loadPauseTime = 3;
 		}
 
 		~StateRecorder(void)
@@ -1243,6 +1244,7 @@ class StateRecorder
 			printf("ringBufSize:%i  framesPerSnap:%i\n", ringBufSize, framesPerSnap );
 
 			compressionLevel = stateRecorderConfig.compressionLevel;
+			loadPauseTime    = stateRecorderConfig.loadPauseTimeSeconds;
 		}
 
 		void update(void)
@@ -1318,6 +1320,11 @@ class StateRecorder
 			lastState = snapIdx;
 			loadIndexReset = true;
 
+			if (loadPauseTime > 0)
+			{	// Temporary pause after loading new state for user to have time to process
+				FCEUI_PauseForDuration(loadPauseTime);
+			}
+
 			return 0;
 		}
 
@@ -1362,6 +1369,7 @@ class StateRecorder
 		int  ringStart;
 		int  ringBufSize;
 		int  compressionLevel;
+		int  loadPauseTime;
 		unsigned int frameCounter;
 		unsigned int framesPerSnap;
 		unsigned int lastLoadFrame;

src/state.h

@@ -84,12 +84,14 @@ struct StateRecorderConfigData
 	float historyDurationMinutes;
 	float timeBetweenSnapsMinutes;
 	int   compressionLevel;
+	int   loadPauseTimeSeconds;
 
 	StateRecorderConfigData(void)
 	{
 		historyDurationMinutes = 15.0f;
 		timeBetweenSnapsMinutes = 3.0f / 60.0f;
 		compressionLevel = 0;
+		loadPauseTimeSeconds = 3;
 	}
 };
 

src/video.cpp

@@ -87,6 +87,8 @@ std::string AsSnapshotName ="";			//adelikat:this will set the snapshot name whe
 void FCEUI_SetSnapshotAsName(std::string name) { AsSnapshotName = name; }
 std::string FCEUI_GetSnapshotAsName() { return AsSnapshotName; }
 
+static void FCEU_DrawPauseCountDown(uint8 *XBuf);
+
 void FCEU_KillVirtualVideo(void)
 {
 	if ( XBuf )
@@ -254,6 +256,7 @@ void FCEU_PutImage(void)
 		FCEU_DrawLagCounter(XBuf);
 		FCEU_DrawNTSCControlBars(XBuf);
 		FCEU_DrawRecordingStatus(XBuf);
+		FCEU_DrawPauseCountDown(XBuf);
 		ShowFPS();
 	}
 
@@ -771,3 +774,35 @@ void ShowFPS(void)
 
 	DrawTextTrans(XBuf + ((256 - ClipSidesOffset) - 40) + (FSettings.FirstSLine + 4) * 256, 256, (uint8*)fpsmsg, 0xA0);
 }
+
+bool showPauseCountDown = true;
+
+static void FCEU_DrawPauseCountDown(uint8 *XBuf)
+{
+	if (EmulationPaused & EMULATIONPAUSED_TIMER)
+	{
+		int pauseFramesLeft = FCEUI_PauseFramesRemaining();
+
+		if (showPauseCountDown && (pauseFramesLeft > 0) )
+		{
+			char text[32];
+			int framesPerSec;
+
+			if (PAL || dendy)
+			{
+				framesPerSec = 50;
+			}
+			else
+			{
+				framesPerSec = 60;
+			}
+
+			sprintf(text, "Unpausing in %d...", (pauseFramesLeft / framesPerSec) + 1);
+
+			if (text[0])
+			{
+				DrawTextTrans(XBuf + ClipSidesOffset + (FSettings.FirstSLine) * 256, 256, (uint8*)text, 0xA0);
+			}
+		}
+	}
+}