Licar mod for making TAS (tool assisted speedruns). This is a simple mod that
only adds one feature: instead of completely restarting a map, the restart key
rather rewinds time a little back. This allows to retry any part of a map as
many times as one desires. It also helps to slow down time in the settings.

diff --git a/data b/data
index def2738..f77c9bb 100644
--- a/data
+++ b/data
@@ -209,3 +209,11 @@ air path
 #Rdrummy LCbonus1 13'16;00LCbonus1;999b1acd 0000399:0001:0089:0051:0079:0021:0093:0031:0089:0031:0119:0091:0053:00f1:01a3:00d1:0099:0201:0073:0051:0063:0051:0059:0051:00d9:00b1:0089:0041:00a3:0031:02b9:0048:0020:0081:0149:00c1:0059:0031:0113:0051:0019:0078:0099:0041
 #Rdrummy LCbonus2 24'18;00LCbonus2;288d28fe 0000733:0001:0153:00d1:0023:0081:00d3:0041:0023:00a9:0128:0034:0036:00e4:005c:0054:0096:0044:007c:0024:0146:0112:0018:0029:00f1:0063:0061:00c3:0031:00c3:0031:0025:0031:0039:0081:0033:01d1:0083:0081:0073:0031:00e3:0071:00f9:0051:01b9:00c4:0040:0028:0069:0021:0043:00e1:0090:0046:00b0:0031:0043:0070:0024:0026:00e0:0018:0049:0018:0039:01a1:0039:0051:0049:0048:001c:0098:0050:0011:0039:0061:00d9:0041:00a9:0018:00c9:00e1:0083:0042:0010:0042:0093:00b1:0170:0022:0016:0042:0083:0141:0013:0021:0059:0041:0053
 #Rdrummy LCpressforw1 21'31;00LCpressforw1;6363b43d 0000599:0001
+#RLCtiny1 17'457;00LCtiny1;ae1ab677 0000529:0001:01d3:0031:0139:0031:00f9:0051:00a9:0031:0059:0051:0029:0091:0089:0031:0010:0161:0079:0071:00a3:0061:0030:0481:00f3:0041:0063:0041:0043:00c1:0169:0080:0228:005c:0108:0010:0031:0013:01f1:0089:00b1:0115:0051:01f3:0031:00c9:0011:0133:0021
+#RLC1 15'048;00LC1;8bd6e314 0000456:0001:0079:0011:0049:0021:0059:0031:0059:0051:0149:0091:0029:0011:0049:0021:0029:0021:0069:0021:0069:0021:0029:0021:00e9:0095:0021:0049:0151:0069:0051:0029:0031:0059:0021:00f9:0041:0039:0021:0099:0011:00a9:0011:0063:0011:00b3:0011:0213:0031:0063:0021:0093:0051:0013:00b1:0023:0021:0013:0051:0013:0021:0063:0051:0033:0041:0073:0011:0063:0021:0063:0021:0199:0031:0283:0021:0163:0011
+#RLC5 22'737;00LC5;90f26004 0000689:0001:0099:0031:0089:0031:00f5:0021:0049:0101:0069:0041:0029:0021:0039:0021:0019:0021:0039:0021:0063:0041:00d9:0021:0063:0011:00a3:0011:0093:0021:0093:0021:0013:0011:0043:0051:0013:0061:0073:0031:0023:0031:00c3:0011:0023:0021:0043:0041:0033:0011:0023:0011:0013:0011:0033:0021:0023:0031:0023:0041:0079:0031:0133:0031:0023:0031:0069:0011:0223:0021:0033:0031:00a5:0021:0023:0021:0023:0071:0049:0021:0053:0021:00e9:0071:0029:0051:0019:0021:0093:0031:0053:0011:0059:0071:0109:0011:02e9:00c1:0053:0021:00e9:0021:0029:0021:0019:0045:0021:0049:0021:0029:0051:0019:0041:0069:0041:0059:0051:0029:0011:0029:0031:0019:0021:0039:0011:0119:0031:0029:0021:01b5:0031:0029:0011:0029:0031:0039:0011:0073:0021:0023:0031:0013:00c1:0019:0051:0069
+#RLC5 22'209;00LC5;90f26004 0000673:0001:0199:0061:0025:0031:0069:0021:0019:0091:0039:0041:0079:0031:00a9:0021:0153:0031:0063:0071:0039:0075:0011:0125:0021:01c9:0041:0059:0021:00c3:0011:00b9:0031:0079:0041:0069:0041:0059:0071:0019:0031:0019:0011:00b9:0031:0029:0011:0049:0011:0029:0021:0019:0011:0019:0031:0029:0021:0019:0041:0019:0021:0019:0021:00b9:0051:0089:0011:0085:0021:0069:0021:0083:0021:0023:0041:0013:0021:0129:0051:0025:0021:0049:0011:0049:0091:0023:0061:0033:0021:0023:0021:0059:0031:0069:00d1:0089:0051:0033:0011:0029:00a1:0039:0031:0019:0021:0033:0041:0045:0021:0019:0051:0039:0021:0019:0041:0039:0011:0059:0031:0029:0061:0029:0021:0019:0021:0029:0011:0083:0021:0033:0031:0079:0021:0039:0041:0105:0021:0069:0021:0049:0051:0043:0021:0023:0021:0023:0031:0013:0021:0013:0071:0053:0051:0013:0041:00a9
+#RLC5 21'615;00LC5;90f26004 0000655:0001:00b9:0061:01d5:0021:00e3:0011:01f3:0011:0073:0031:0023:0021:0209:0021:0099:0021:0029:0021:0049:0021:0029:0021:0023:0021:0049:0021:0069:0031:0019:0031:0029:0021:0049:0071:0019:0031:0019:0011:0059:0051:0029:0021:0019:0011:0029:0021:0019:0021:0019:0021:0029:0021:0029:0021:0019:0071:0063:0011:0049:0011:0029:0021:0019:0021:0053:0021:0023:0041:0049:0051:0039:0021:0093:0021:0023:0021:0033:0031:0013:0041:0023:0021:00d9:0031:0039:0021:0045:0029:0051:0029:00c1:0033:0081:0023:0041:0049:0021:0039:0021:0183:0021:0029:00c1:0059:0011:0029:0061:0029:0021:0029:0021:0039:0011:0029:0021:0099:0021:0039:0021:0019:0035:0011:0029:0031:0019:00c1:0019:0021:0053:0021:0039:0051:0049:0021:0019:0021:0019:0031:0119:0011:0059:0021:0175:0011:0089:0091:0043:0021:0013:0041:0013:0031:0043:00d1:0049:0061
+#RLC5 21'450;00LC5;90f26004 0000650:0001:00b9:0061:01d5:0021:00e3:0011:01f3:0011:0073:0031:0023:0021:0209:0021:0099:0021:0029:0021:0049:0021:0029:0021:0023:0021:0049:0021:0069:0031:0019:0031:0029:0021:0049:0071:0019:0031:0019:0011:0059:0051:0029:0021:0019:0011:0029:0021:0019:0021:0019:0021:0029:0021:0029:0021:0019:0071:0063:0011:0049:0011:0029:0021:0019:0021:0053:0021:0023:0041:0049:0051:0039:0021:0093:0021:0023:0021:0033:0031:0013:0041:0023:0021:00d9:0031:0039:0021:0045:0029:0051:0029:00c1:0033:0081:0023:0041:0049:0021:0039:0021:0183:0021:0029:00c1:0059:0011:0029:0061:0029:0021:0029:0021:0039:0011:0029:0021:0099:0021:0039:0021:0019:0035:0011:0029:0031:0019:00c1:0019:0021:0053:0021:0039:0051:0049:0021:0019:0021:0019:0031:0119:0011:0059:0021:0130:0011:0069:0031:00e9:0021:0083:00e1:0069:0071
+#RLC5 20'361;00LC5;90f26004 0000617:0031:0049:0041:0029:0021:0039:0021:0069:0051:0049:0081:0045:0011:0029:0021:0029:0021:0019:0011:0073:0031:0093:0031:0093:0031:00b3:0011:0049:0021:01e3:0031:0089:0051:0019:0021:0073:0041:0039:0021:0069:0031:0019:0021:0029:0021:0069:00a1:0029:0021:0019:0021:0019:0021:0019:0021:0019:0021:0019:0021:0019:0011:0029:0011:0019:0021:0019:0041:0019:0021:0019:0021:0019:0021:0019:0021:0019:0011:0089:0031:0019:0011:0049:0041:0039:0031:0019:0021:00b9:0021:00d3:0021:0043:0021:0043:0051:0099:0021:0019:0021:00d9:0021:0073:0021:0039:0031:0339:00b1:0019:0031:0103:0011:0095:0021:00b9:0021:0089:0021:0059:0051:0029:0031:0019:0031:0019:0021:0059:0021:0039:0021:0039:0021:0039:0021:01b5:0021:0173:0041:0023:0011:0013:00c1
+#RLC5 20'295;00LC5;90f26004 0000615:0031:0049:0041:0029:0021:0039:0021:0069:0051:0049:0081:0045:0011:0029:0021:0029:0021:0019:0011:0073:0031:0093:0031:0093:0031:00b3:0011:0049:0021:01e3:0031:0089:0051:0019:0021:0073:0041:0039:0021:0069:0031:0019:0021:0029:0021:0069:00a1:0029:0021:0019:0021:0019:0021:0019:0021:0019:0021:0019:0021:0019:0011:0029:0011:0019:0021:0019:0041:0019:0021:0019:0021:0019:0021:0019:0021:0019:0011:0089:0031:0019:0011:0049:0041:0039:0031:0019:0021:00b9:0021:00d3:0021:0043:0021:0043:0051:0099:0021:0019:0021:00d9:0021:0073:0021:0039:0031:0339:00b1:0019:0031:0103:0011:0095:0021:00b9:0021:0089:0021:0059:0051:0029:0031:0019:0031:0019:0021:0059:0021:0039:0021:0039:0021:0039:0021:0120:0021:0099:0021:0089:0011:00e3:0031:0013:00c1:0039:0031:0079
diff --git a/game.h b/game.h
index b1db32c..e57b6a9 100644
--- a/game.h
+++ b/game.h
@@ -344,6 +344,9 @@ struct
   uint32_t runTime;                  ///< Current time of the run, in ticks.
   uint8_t mapBeaten;
 
+  uint8_t tasInputs[LCR_SETTING_TAS_MAX_INPUTS / 2 + 1];
+  unsigned int tasInputCount;
+
   char popupStr[LCR_POPUP_STR_SIZE];
   uint8_t popupCountdown;
 
@@ -504,8 +507,37 @@ void LCR_gameResetRun(uint8_t replay, uint8_t ghost)
   LCR_game.ghost.active = ghost;
 #endif
 
-  LCR_gameSetState(LCR_GAME_STATE_RUN_STARTING);
   LCR_game.runTime = 0;
+
+  if (!LCR_racing.replay.on)
+  {
+    LCR_game.tasInputCount =
+      LCR_game.tasInputCount >= LCR_SETTING_TAS_REWIND ?
+        LCR_game.tasInputCount - LCR_SETTING_TAS_REWIND : 0;
+
+    for (unsigned int i = 0; i < LCR_game.tasInputCount; ++i)
+    {
+      if (LCR_racingStep((LCR_game.tasInputs[i / 2] >> ((i % 2) * 4)) & 0x0f)
+        == LCR_RACING_EVENT_CP_TAKEN)
+      {
+        int carBlock[3];
+        LCR_racingGetCarBlockCoords(carBlock);
+        LCR_rendererMarkTakenCP(carBlock[0],carBlock[1],carBlock[2]);
+      }
+
+      LCR_game.runTime = LCR_racing.tick;
+    }
+
+    LCR_gameSetState(LCR_GAME_STATE_RUN);
+    LCR_racingGetCarTransform(carTransform,carTransform + 3,0);
+    LCR_rendererSetCarTransform(carTransform,carTransform + 3);
+    LCR_rendererCameraReset();
+    LCR_rendererLoadMapChunks();
+    LCR_game.nextRenderFrameTime = LCR_game.time + 1000 / LCR_SETTING_FPS;
+    LCR_game.nextRacingTickTime = LCR_game.time + LCR_RACING_TICK_MS_RT; 
+  }
+  else
+    LCR_gameSetState(LCR_GAME_STATE_RUN_STARTING);
 }
 
 void LCR_gameGetNthGhostSample(unsigned int n,
@@ -867,6 +899,7 @@ uint8_t LCR_gameLoadMap(unsigned int mapIndex)
 
   result = LCR_mapLoadFromStr(LCR_gameGetNextDataStrChar,name);
   LCR_game.mapBeaten = LCR_mapIsBeaten(LCR_currentMap.name);
+  LCR_game.tasInputCount = 0;
 
   return result;
 }
@@ -1765,6 +1798,23 @@ uint8_t LCR_gameStep(uint32_t time)
          (LCR_game.keyStates[LCR_KEY_DOWN]  ? LCR_RACING_INPUT_BACK  : 0) |
          (LCR_game.keyStates[LCR_KEY_LEFT]  ? LCR_RACING_INPUT_LEFT  : 0));
 
+      if (!LCR_racing.replay.on)
+      {
+        if (LCR_game.tasInputCount >= LCR_SETTING_TAS_MAX_INPUTS)
+        {
+          LCR_LOG1("maximum TAS inputs reached!");
+        }
+        else
+        {
+          uint8_t *inputRec = LCR_game.tasInputs + LCR_game.tasInputCount / 2;
+
+          *inputRec = (LCR_game.tasInputCount % 2) ? 
+           *inputRec | ((input & 0x0f) << 4) : (input & 0x0f);
+
+          LCR_game.tasInputCount++;
+        }
+      }
+
 #ifdef LCR_FPS_GET_MS
       frameTime = LCR_FPS_GET_MS;
 #endif
diff --git a/settings.h b/settings.h
index 332df45..eb87215 100644
--- a/settings.h
+++ b/settings.h
@@ -197,7 +197,7 @@
 
 #ifndef LCR_SETTING_COUNTDOWN_MS
   /** Run start countdown length in milliseconds. */
-  #define LCR_SETTING_COUNTDOWN_MS 2200
+  #define LCR_SETTING_COUNTDOWN_MS 500
 #endif
 
 #ifndef LCR_SETTING_MAP_CHUNK_RELOAD_INTERVAL
@@ -296,4 +296,14 @@
   #define LCR_SETTING_ONLY_SMALL_MAPS 0
 #endif
 
+#ifndef LCR_SETTING_TAS_MAX_INPUTS
+  /** Maximum possible length of a run in the TAS mod, in physics ticks. */
+  #define LCR_SETTING_TAS_MAX_INPUTS 4096
+#endif
+
+#ifndef LCR_SETTING_TAS_REWIND
+  /** Length of TAS rewind, in physics ticks. */
+  #define LCR_SETTING_TAS_REWIND 40
+#endif
+
 #endif // guard