Add support for user-selected and automatic frame skipping. Add support for PAL timings (20 ms per frame).

User-selected frameskip causes slowdowns if the game runs slower than the resulting frame rate, but synchronises correctly if the game runs faster.

Automatic frame skipping is still the default. It now only skips up to 8 frames, but in some games still skips that entire 8 frames. What's needed is an algorithm that averages frame latencies over a few seconds and skips while the latency is LOWER than the average.

1 files changed, 55 insertions, 7 deletions

diff --git a/source/nds/gui.h b/source/nds/gui.h
index 5a40979..ec0dd1a 100644
--- a/source/nds/gui.h
+++ b/source/nds/gui.h
@@ -44,16 +44,63 @@ struct _EMU_CONFIG
 
 struct _GAME_CONFIG
 {
-	u32	clock_speed_number;
-	u32 frameskip_type;
+	u32 clock_speed_number;
+	u32  Reserved0;
 	u32 frameskip_value;
-	u32	graphic;
-	u32	enable_audio;
-	u32 gamepad_config_menu;
+	u32 graphic;
+	u32 enable_audio;
+	u32 Reserved1;
 	u32 backward;
 	u32 backward_time;
-	u32	reserve[32];
-	u32 gamepad_config_map[MAX_GAMEPAD_MAP];
+	u32  Reserved2;
+	u32  Reserved3;
+	u32  Reserved4;
+	u32  Reserved5;
+	u32  Reserved6;
+	u32  Reserved7;
+	u32  Reserved8;
+	u32  Reserved9;
+	u32  Reserved10;
+	u32  Reserved11;
+	u32  Reserved12;
+	u32  Reserved13;
+	u32  Reserved14;
+	u32  Reserved15;
+	u32  Reserved16;
+	u32  Reserved17;
+	u32  Reserved18;
+	u32  Reserved19;
+	u32  Reserved20;
+	u32  Reserved21;
+	u32  Reserved22;
+	u32  Reserved23;
+	u32  Reserved24;
+	u32  Reserved25;
+	u32  Reserved26;
+	u32  Reserved27;
+	u32  Reserved28;
+	u32  Reserved29;
+	u32  Reserved30;
+	u32  Reserved31;
+	u32  Reserved32;
+
+	u32  Reserved33;
+	u32  Reserved34;
+	u32  Reserved35;
+	u32  Reserved36;
+	u32  Reserved37;
+	u32  Reserved38;
+	u32  Reserved39;
+	u32  Reserved40;
+	u32  Reserved41;
+	u32  Reserved42;
+	u32  Reserved43;
+	u32  Reserved44;
+	u32  Reserved45;
+	u32  Reserved46;
+	u32  Reserved47;
+	u32  Reserved48;
+	u32  Reserved49;
 };
 
 typedef enum
@@ -118,6 +165,7 @@ extern GAME_CONFIG	game_config;
 extern void gui_init(u32 lang_id);
 extern u32 menu(u16 *original_screen);
 extern void game_disableAudio();
+extern void game_set_frameskip();
 extern void set_cpu_clock(u32 num);
 
 #ifdef __cplusplus