Mercurial > vba-linux

     1 // System.cpp : Defines the system behaviors for the emulator.

     2 //

     3 #include "stdafx.h"

     4 #include "Sound.h"

     5 #include "Input.h"

     6 #include "IUpdate.h"

     7 #include "ram_search.h"

     8 #include "WinMiscUtil.h"

     9 #include "WinResUtil.h"

    10 #include "resource.h"

    11 #include "VBA.h"

    12 #include "../gba/GBA.h"

    13 #include "../gba/GBAGlobals.h"

    14 #include "../gba/GBASound.h"

    15 #include "../gb/GB.h"

    16 #include "../gb/gbGlobals.h"

    17 //#include "../common/System.h"

    18 #include "../common/movie.h"

    19 #include "../common/vbalua.h"

    20 #include "../common/Text.h"

    21 #include "../common/Util.h"

    22 #include "../common/nesvideos-piece.h"

    23 #include "../version.h"

    24 #include <cassert>

    25 

    26 struct EmulatedSystem theEmulator;

    27 

    28 u32	 RGB_LOW_BITS_MASK		 = 0;

    29 int	 emulating				 = 0;

    30 int	 systemCartridgeType	 = 0;

    31 int	 systemSpeed			 = 0;

    32 bool systemSoundOn			 = false;

    33 u32	 systemColorMap32[0x10000];

    34 u16	 systemColorMap16[0x10000];

    35 u16	 systemGbPalette[24];

    36 int	 systemRedShift			 = 0;

    37 int	 systemBlueShift		 = 0;

    38 int	 systemGreenShift		 = 0;

    39 int	 systemColorDepth		 = 16;

    40 int	 systemDebug			 = 0;

    41 int	 systemVerbose			 = 0;

    42 int	 systemFrameSkip		 = 0;

    43 int	 systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;

    44 

    45 const int32 INITIAL_SENSOR_VALUE = 2047;

    46 

    47 int32 sensorX = INITIAL_SENSOR_VALUE;

    48 int32 sensorY = INITIAL_SENSOR_VALUE;

    49 u16	  currentButtons [4] = { 0, 0, 0, 0 };	// constrain: never contains hacked buttons, only the lower 16 bits of each are used

    50 u16   lastKeys = 0;

    51 

    52 // static_assertion that BUTTON_REGULAR_RECORDING_MASK should be an u16 constant

    53 namespace { const void * const s_STATIC_ASSERTION_(static_cast<void *>(BUTTON_REGULAR_RECORDING_MASK & 0xFFFF0000)); }

    54 

    55 #define BMP_BUFFER_MAX_WIDTH (256)

    56 #define BMP_BUFFER_MAX_HEIGHT (224)

    57 #define BMP_BUFFER_MAX_DEPTH (4)

    58 static u8 bmpBuffer[BMP_BUFFER_MAX_WIDTH * BMP_BUFFER_MAX_HEIGHT * BMP_BUFFER_MAX_DEPTH];

    59 

    60 static int s_stockThrottleValues[] = {

    61 	6, 15, 25, 25, 37, 50, 75, 87, 100, 112, 125, 150, 200, 300, 400, 600, 800, 1000

    62 };

    63 

    64 // systemXYZ: Win32 stuff

    65 

    66 // input

    67 

    68 void systemSetSensorX(int32 x)

    69 {

    70 	sensorX = x;

    71 }

    72 

    73 void systemSetSensorY(int32 y)

    74 {

    75 	sensorY = y;

    76 }

    77 

    78 void systemResetSensor()

    79 {

    80 	sensorX = sensorY = INITIAL_SENSOR_VALUE;

    81 }

    82 

    83 int32 systemGetSensorX()

    84 {

    85 	return sensorX;

    86 }

    87 

    88 int32 systemGetSensorY()

    89 {

    90 	return sensorY;

    91 }

    92 

    93 // handles motion sensor input

    94 void systemUpdateMotionSensor(int i)

    95 {

    96 	if (i < 0 || i > 3)

    97 		i = 0;

    98 

    99 	if (currentButtons[i] & BUTTON_MASK_LEFT_MOTION)

   100 	{

   101 		sensorX += 3;

   102 		if (sensorX > 2197)

   103 			sensorX = 2197;

   104 		if (sensorX < 2047)

   105 			sensorX = 2057;

   106 	}

   107 	else if (currentButtons[i] & BUTTON_MASK_RIGHT_MOTION)

   108 	{

   109 		sensorX -= 3;

   110 		if (sensorX < 1897)

   111 			sensorX = 1897;

   112 		if (sensorX > 2047)

   113 			sensorX = 2037;

   114 	}

   115 	else if (sensorX > 2047)

   116 	{

   117 		sensorX -= 2;

   118 		if (sensorX < 2047)

   119 			sensorX = 2047;

   120 	}

   121 	else

   122 	{

   123 		sensorX += 2;

   124 		if (sensorX > 2047)

   125 			sensorX = 2047;

   126 	}

   127 

   128 	if (currentButtons[i] & BUTTON_MASK_UP_MOTION)

   129 	{

   130 		sensorY += 3;

   131 		if (sensorY > 2197)

   132 			sensorY = 2197;

   133 		if (sensorY < 2047)

   134 			sensorY = 2057;

   135 	}

   136 	else if (currentButtons[i] & BUTTON_MASK_DOWN_MOTION)

   137 	{

   138 		sensorY -= 3;

   139 		if (sensorY < 1897)

   140 			sensorY = 1897;

   141 		if (sensorY > 2047)

   142 			sensorY = 2037;

   143 	}

   144 	else if (sensorY > 2047)

   145 	{

   146 		sensorY -= 2;

   147 		if (sensorY < 2047)

   148 			sensorY = 2047;

   149 	}

   150 	else

   151 	{

   152 		sensorY += 2;

   153 		if (sensorY > 2047)

   154 			sensorY = 2047;

   155 	}

   156 }

   157 

   158 int systemGetDefaultJoypad()

   159 {

   160 	return theApp.joypadDefault;

   161 }

   162 

   163 void systemSetDefaultJoypad(int which)

   164 {

   165 	theApp.joypadDefault = which;

   166 }

   167 

   168 bool systemReadJoypads()

   169 {

   170 	// this function is called at every frame, even if vba is fast-forwarded.

   171 	// so we try to limit the input frequency here just in case.

   172 	static u32 lastTime = systemGetClock();

   173 	if ((u32)(systemGetClock() - lastTime) < 10)

   174 		return false;

   175 	lastTime = systemGetClock();

   176 

   177 	if (theApp.input)

   178 		return theApp.input->readDevices();

   179 	return false;

   180 }

   181 

   182 u32 systemGetOriginalJoypad(int i, bool sensor)

   183 {

   184 	if (i < 0 || i > 3)

   185 		i = 0;

   186 

   187 	u32 res = 0;

   188 	if (theApp.input)

   189 		res = theApp.input->readDevice(i, sensor);

   190 

   191 	// +auto input, XOR

   192 	// maybe these should be moved into DirectInput.cpp

   193 	if (theApp.autoFire || theApp.autoFire2)

   194 	{

   195 		res ^= (theApp.autoFireToggle ? theApp.autoFire : theApp.autoFire2);

   196 		if (!theApp.autofireAccountForLag || !systemCounters.laggedLast)

   197 		{

   198 			theApp.autoFireToggle = !theApp.autoFireToggle;

   199 		}

   200 	}

   201 	if (theApp.autoHold)

   202 	{

   203 		res ^= theApp.autoHold;

   204 	}

   205 

   206 	// filter buttons

   207 	// maybe better elsewhere?

   208 	if (!theApp.allowLeftRight)

   209 	{

   210 		// disallow L+R or U+D to being pressed at the same time

   211 		if ((res & (BUTTON_MASK_RIGHT | BUTTON_MASK_LEFT)) == (BUTTON_MASK_RIGHT | BUTTON_MASK_LEFT))

   212 			res &= ~BUTTON_MASK_RIGHT;  // leave only LEFT on

   213 		if ((res & (BUTTON_MASK_DOWN | BUTTON_MASK_UP)) == (BUTTON_MASK_DOWN | BUTTON_MASK_UP))

   214 			res &= ~BUTTON_MASK_DOWN;  // leave only UP on

   215 	}

   216 

   217 	if (!sensor)

   218 	{

   219 		if (res & BUTTON_MOTION_MASK)

   220 			res &= ~BUTTON_MOTION_MASK;

   221 	}

   222 

   223 	if (systemCartridgeType != 0 && !gbSgbMode) // regular GB has no L/R buttons

   224 	{

   225 		if (res & (BUTTON_GBA_ONLY))

   226 			res &= ~BUTTON_GBA_ONLY;

   227 	}

   228 

   229 	currentButtons[i] = res & BUTTON_REGULAR_RECORDING_MASK;

   230 

   231 	return res;

   232 }

   233 

   234 u32 systemGetJoypad(int i, bool sensor)

   235 {

   236 	if (i < 0 || i > 3)

   237 		i = 0;

   238 

   239 	// input priority: original+auto < Lua < frame search < movie, correct this if wrong

   240 

   241 	// get original+auto input

   242 	u32 hackedButtons = systemGetOriginalJoypad(i, sensor) & BUTTON_NONRECORDINGONLY_MASK;

   243 	u32 res = currentButtons[i];

   244 

   245 	// since movie input has the highest priority, there's no point to read from other input

   246 	if (VBAMoviePlaying())

   247 	{

   248 		// VBAMovieRead() overwrites currentButtons[i]

   249 		VBAMovieRead(i, sensor);

   250 		res = currentButtons[i];

   251 	}

   252 	else

   253 	{

   254 		// Lua input, shouldn't have any side effect within them

   255 		if (VBALuaUsingJoypad(i))

   256 			res = VBALuaReadJoypad(i);

   257 

   258 		// override input above

   259 		if (theApp.frameSearchSkipping)

   260 			res = theApp.frameSearchOldInput[i];

   261 

   262 		// flush non-hack buttons into the "current buttons" input buffer, which will be read by the movie routine

   263 		currentButtons[i] = res & BUTTON_REGULAR_RECORDING_MASK;

   264 		VBAMovieWrite(i, sensor);

   265 	}

   266 

   267 	return res | hackedButtons;

   268 }

   269 

   270 void systemSetJoypad(int which, u32 buttons)

   271 {

   272 	if (which < 0 || which > 3)

   273 		which = 0;

   274 

   275 	currentButtons[which] = buttons;

   276 

   277 	lastKeys = 0;

   278 }

   279 

   280 void systemClearJoypads()

   281 {

   282 	for (int i = 0; i < 3; ++i)

   283 		currentButtons[i] = 0;

   284 

   285 	lastKeys = 0;

   286 }

   287 

   288 // screen

   289 

   290 // delayed repaint

   291 void systemRefreshScreen()

   292 {

   293 	if (theApp.m_pMainWnd)

   294 	{

   295 		theApp.m_pMainWnd->PostMessage(WM_PAINT, NULL, NULL);

   296 	}

   297 }

   298 

   299 extern bool vbaShuttingDown;

   300 

   301 void systemRenderFrame()

   302 {

   303 	extern long linearSoundFrameCount;

   304 	extern long linearFrameCount;

   305 

   306 	if (vbaShuttingDown)

   307 		return;

   308 

   309 	++theApp.renderedFrames;

   310 

   311 	VBAUpdateFrameCountDisplay();

   312 	VBAUpdateButtonPressDisplay();

   313 

   314 	// "in-game" text rendering

   315 	if (textMethod == 0) // transparent text can only be painted once, so timed messages will not be updated

   316 	{

   317 		extern void DrawLuaGui();

   318 		DrawLuaGui();

   319 

   320 		int copyX = 240, copyY = 160;

   321 		if (systemCartridgeType == 1)

   322 			if (gbBorderOn)

   323 				copyX = 256, copyY = 224;

   324 			else

   325 				copyX = 160, copyY = 144;

   326 		int pitch = copyX * (systemColorDepth / 8) + (systemColorDepth == 24 ? 0 : 4);  // FIXME: sure?

   327 

   328 		DrawTextMessages((u8 *)pix, pitch, 0, copyY);

   329 	}

   330 

   331 	++linearFrameCount;

   332 	if (!theApp.sound)

   333 	{

   334 		if (linearFrameCount > 10000)

   335 			linearFrameCount -= 10000;

   336 		linearSoundFrameCount = linearFrameCount;

   337 	}

   338 

   339 	// record avi

   340 	int width  = 240;

   341 	int height = 160;

   342 	switch (systemCartridgeType)

   343 	{

   344 	case 0:

   345 		width  = 240;

   346 		height = 160;

   347 		break;

   348 	case 1:

   349 		if (gbBorderOn)

   350 		{

   351 			width  = 256;

   352 			height = 224;

   353 		}

   354 		else

   355 		{

   356 			width  = 160;

   357 			height = 144;

   358 		}

   359 		break;

   360 	}

   361 

   362 	bool firstFrameLogged = false;

   363 	--linearFrameCount;

   364 	do

   365 	{

   366 		++linearFrameCount;

   367 

   368 		if (theApp.aviRecording && (!theApp.altAviRecordMethod || (theApp.altAviRecordMethod && !firstFrameLogged)))

   369 		{

   370 			// usually aviRecorder is created when vba starts avi recording, though

   371 			if (theApp.aviRecorder == NULL)

   372 			{

   373 				theApp.aviRecorder = new AVIWrite();

   374 

   375 				theApp.aviRecorder->SetFPS(60);

   376 

   377 				BITMAPINFOHEADER bi;

   378 				memset(&bi, 0, sizeof(bi));

   379 				bi.biSize	   = 0x28;

   380 				bi.biPlanes	   = 1;

   381 				bi.biBitCount  = 24;

   382 				bi.biWidth	   = width;

   383 				bi.biHeight	   = height;

   384 				bi.biSizeImage = 3 * width * height;

   385 				theApp.aviRecorder->SetVideoFormat(&bi);

   386 				if (!theApp.aviRecorder->Open(theApp.aviRecordName))

   387 				{

   388 					delete theApp.aviRecorder;

   389 					theApp.aviRecorder	= NULL;

   390 					theApp.aviRecording = false;

   391 				}

   392 			}

   393 

   394 			if (theApp.aviRecorder != NULL && !theApp.aviRecorder->IsPaused())

   395 			{

   396 				assert(

   397 				    width <= BMP_BUFFER_MAX_WIDTH && height <= BMP_BUFFER_MAX_HEIGHT && systemColorDepth <=

   398 				    BMP_BUFFER_MAX_DEPTH * 8);

   399 				utilWriteBMP(bmpBuffer, width, height, systemColorDepth, pix);

   400 				theApp.aviRecorder->AddFrame(bmpBuffer);

   401 			}

   402 		}

   403 

   404 		if (theApp.nvVideoLog)

   405 		{

   406 			// convert from whatever bit depth to 16-bit, while stripping away extra pixels

   407 			assert(width <= BMP_BUFFER_MAX_WIDTH && height <= BMP_BUFFER_MAX_HEIGHT && 16 <= BMP_BUFFER_MAX_DEPTH * 8);

   408 			utilWriteBMP(bmpBuffer, width, -height, 16, pix);

   409 			NESVideoLoggingVideo((u8 *)bmpBuffer, width, height, 0x1000000 * 60);

   410 		}

   411 

   412 		firstFrameLogged = true;

   413 	}

   414 	while (linearFrameCount < linearSoundFrameCount); // compensate for frames lost due to frame skip being nonzero, etc.

   415 

   416 	if (textMethod != 0) // do not draw Lua HUD to a video dump

   417 	{

   418 		extern void DrawLuaGui();

   419 		DrawLuaGui();

   420 	}

   421 

   422 	// interframe blending

   423 	if (theApp.ifbFunction)

   424 	{

   425 		if (systemColorDepth == 16)

   426 			theApp.ifbFunction(pix + theApp.filterWidth * 2 + 4, theApp.filterWidth * 2 + 4,

   427 			                   theApp.filterWidth, theApp.filterHeight);

   428 		else

   429 			theApp.ifbFunction(pix + theApp.filterWidth * 4 + 4, theApp.filterWidth * 4 + 4,

   430 			                   theApp.filterWidth, theApp.filterHeight);

   431 	}

   432 

   433 	systemRedrawScreen();

   434 }

   435 

   436 void systemRedrawScreen()

   437 {

   438 	if (vbaShuttingDown)

   439 		return;

   440 

   441 	if (theApp.display)

   442 		theApp.display->render();

   443 

   444 	systemUpdateListeners();

   445 }

   446 

   447 void systemUpdateListeners()

   448 {

   449 	if (vbaShuttingDown)

   450 		return;

   451 

   452 	Update_RAM_Search(); // updates RAM search and RAM watch

   453 

   454 	// update viewers etc.

   455 	if (theApp.updateCount)

   456 	{

   457 		POSITION pos = theApp.updateList.GetHeadPosition();

   458 		while (pos)

   459 		{

   460 			IUpdateListener *up = theApp.updateList.GetNext(pos);

   461 			if (up)

   462 				up->update();

   463 		}

   464 	}

   465 }

   466 

   467 int systemScreenCapture(int captureNumber)

   468 {

   469 	return winScreenCapture(captureNumber);

   470 }

   471 

   472 void systemMessage(int number, const char *defaultMsg, ...)

   473 {

   474 	CString buffer;

   475 	va_list valist;

   476 	CString msg = defaultMsg;

   477 	if (number)

   478 		msg = winResLoadString(number);

   479 

   480 	va_start(valist, defaultMsg);

   481 	buffer.FormatV(msg, valist);

   482 

   483 	theApp.winCheckFullscreen();

   484 	systemSoundClearBuffer();

   485 	AfxGetApp()->m_pMainWnd->MessageBox(buffer, winResLoadString(IDS_ERROR), MB_OK | MB_ICONERROR);

   486 

   487 	va_end(valist);

   488 }

   489 

   490 void systemScreenMessage(const char *msg, int slot, int duration, const char *colorList)

   491 {

   492 	if (slot < 0 || slot > SCREEN_MESSAGE_SLOTS)

   493 		return;

   494 

   495 	theApp.screenMessage[slot] = true;

   496 	theApp.screenMessageTime[slot]		  = GetTickCount();

   497 	theApp.screenMessageDuration[slot]	  = duration;

   498 	theApp.screenMessageBuffer[slot]	  = msg;

   499 	theApp.screenMessageColorBuffer[slot] = colorList ? colorList : "";

   500 

   501 	if (theApp.screenMessageBuffer[slot].GetLength() > 40)

   502 		theApp.screenMessageBuffer[slot] = theApp.screenMessageBuffer[slot].Left(40);

   503 

   504 	// update the display when a main slot message appears while the game is paused

   505 	if (slot == 0 && (theApp.paused || (theApp.frameSearching)))

   506 		systemRefreshScreen();

   507 }

   508 

   509 void systemShowSpeed(int speed)

   510 {

   511 	systemSpeed = speed;

   512 	theApp.showRenderedFrames = theApp.renderedFrames;

   513 	theApp.renderedFrames	  = 0;

   514 	if (theApp.videoOption <= VIDEO_4X && theApp.showSpeed)

   515 	{

   516 		CString buffer;

   517 		if (theApp.showSpeed == 1)

   518 			buffer.Format(VBA_NAME_AND_VERSION " %3d%%", systemSpeed);

   519 		else

   520 			buffer.Format(VBA_NAME_AND_VERSION " %3d%% (%d fps | %d skipped)",

   521 			              systemSpeed,

   522 			              theApp.showRenderedFrames,

   523 			              systemFrameSkip);

   524 

   525 		systemSetTitle(buffer);

   526 	}

   527 }

   528 

   529 void systemSetTitle(const char *title)

   530 {

   531 	if (theApp.m_pMainWnd != NULL)

   532 	{

   533 		AfxGetApp()->m_pMainWnd->SetWindowText(title);

   534 	}

   535 }

   536 

   537 // timing/speed

   538 

   539 u32 systemGetClock()

   540 {

   541 	return timeGetTime();

   542 }

   543 

   544 void systemIncreaseThrottle()

   545 {

   546 	int throttle = theApp.throttle;

   547 

   548 	if (throttle < 6)

   549 		++throttle;

   550 	else if (throttle < s_stockThrottleValues[_countof(s_stockThrottleValues) - 1])

   551 	{

   552 		int i = 0;

   553 		while (throttle >= s_stockThrottleValues[i])

   554 		{

   555 			++i;

   556 		}

   557 		throttle = s_stockThrottleValues[i];

   558 	}

   559 

   560 	systemSetThrottle(throttle);

   561 }

   562 

   563 void systemDecreaseThrottle()

   564 {

   565 	int throttle = theApp.throttle;

   566 

   567 	if (throttle > 6)

   568 	{

   569 		int i = _countof(s_stockThrottleValues) - 1;

   570 		while (throttle <= s_stockThrottleValues[i])

   571 		{

   572 			--i;

   573 		}

   574 		throttle = s_stockThrottleValues[i];

   575 	}

   576 	else if (throttle > 1)

   577 		--throttle;

   578 

   579 	systemSetThrottle(throttle);

   580 }

   581 

   582 void systemSetThrottle(int throttle)

   583 {

   584 	theApp.throttle = throttle;

   585 	char str[256];

   586 	sprintf(str, "%d%% throttle speed", theApp.throttle);

   587 	systemScreenMessage(str);

   588 }

   589 

   590 int systemGetThrottle()

   591 {

   592 	return theApp.throttle;

   593 }

   594 

   595 void systemFrame()

   596 {

   597 	if (theApp.altAviRecordMethod && theApp.aviRecording)

   598 	{

   599 		if (theApp.aviRecorder)

   600 		{

   601 			if (!theApp.aviRecorder->IsSoundAdded())

   602 			{

   603 				WAVEFORMATEX wfx;

   604 				memset(&wfx, 0, sizeof(wfx));

   605 				wfx.wFormatTag		= WAVE_FORMAT_PCM;

   606 				wfx.nChannels		= 2;

   607 				wfx.nSamplesPerSec	= 44100 / soundQuality;

   608 				wfx.wBitsPerSample	= 16;

   609 				wfx.nBlockAlign		= (wfx.wBitsPerSample / 8) * wfx.nChannels;

   610 				wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;

   611 				wfx.cbSize = 0;

   612 				theApp.aviRecorder->SetSoundFormat(&wfx);

   613 			}

   614 			theApp.aviRecorder->AddSound((u8 *)soundFrameSound, soundFrameSoundWritten * 2);

   615 		}

   616 	}

   617 

   618 	soundFrameSoundWritten = 0;

   619 

   620 	// no more stupid updates :)

   621 

   622 	extern int quitAfterTime;                   // from VBA.cpp

   623 	void	   VBAMovieStop(bool8 suppress_message); // from ../movie.cpp

   624 	if (quitAfterTime >= 0 && systemCounters.frameCount == quitAfterTime)

   625 	{

   626 		VBAMovieStop(true);

   627 		AfxPostQuitMessage(0);

   628 	}

   629 

   630 	// change the sound speed, or set it to normal - must always do this or it won't get reset after a change, but that's OK

   631 	// because it's inexpensive

   632 	if (theApp.sound)

   633 	{

   634 		theApp.sound->setSpeed(

   635 		    speedup || theApp.winPauseNextFrame || !synchronize || theApp.accuratePitchThrottle || theApp.useOldSync

   636 			? 1.0f : (float)theApp.throttle / 100.0f);

   637 	}

   638 

   639 	// if a throttle speed is set and we're not allowed to change the sound frequency to achieve it,

   640 	// sleep for a certain amount each time we get here to approximate the necessary slowdown

   641 	if (synchronize && (theApp.accuratePitchThrottle || !theApp.sound || theApp.throttle < 6) /*&& !theApp.winPauseNextFrame*/)

   642 	{

   643 		/// FIXME: this is still a horrible way of achieving a certain frame time

   644 		///        (look at what Snes9x does - it's complicated but much much better)

   645 

   646 		static float sleepAmt = 0.0f; // variable to smooth out the sleeping amount so it doesn't oscillate so fast

   647 //		if(!theApp.wasPaused) {

   648 		if (!speedup)

   649 		{

   650 			u32 time = systemGetClock();

   651 			u32 diff = time - theApp.throttleLastTime;

   652 			if (theApp.wasPaused)

   653 				diff = 0;

   654 

   655 			int target = (100000 / (60 * theApp.throttle));

   656 			int d	   = (target - diff);

   657 

   658 			if (d > 1000) // added to avoid 500-day waits for vba to start emulating.

   659 				d = 1000;  // I suspect most users aren't that patient, and would find 1 second to be a more reasonable delay.

   660 

   661 			sleepAmt = 0.8f * sleepAmt + 0.2f * (float)d;

   662 			if (d - sleepAmt <= 1.5f && d - sleepAmt >= -1.5f)

   663 				d = (int)(sleepAmt);

   664 

   665 			if (d > 0)

   666 			{

   667 				Sleep(d);

   668 			}

   669 		}

   670 		theApp.throttleLastTime = systemGetClock();

   671 		//}

   672 		//else

   673 		//{

   674 		// Sleep(100);

   675 		//}

   676 	}

   677 

   678 	if (systemCounters.frameCount % 10 == 0)

   679 	{

   680 		if (theApp.rewindMemory)

   681 		{

   682 			if (++theApp.rewindCounter >= (theApp.rewindTimer))

   683 			{

   684 				theApp.rewindSaveNeeded = true;

   685 				theApp.rewindCounter	= 0;

   686 			}

   687 		}

   688 		if (systemSaveUpdateCounter)

   689 		{

   690 			if (--systemSaveUpdateCounter <= SYSTEM_SAVE_NOT_UPDATED)

   691 			{

   692 				winWriteBatteryFile();

   693 				systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;

   694 			}

   695 		}

   696 	}

   697 

   698 	theApp.wasPaused = false;

   699 ///  theApp.autoFrameSkipLastTime = time;

   700 }

   701 

   702 int systemFramesToSkip()

   703 {

   704 	int framesToSkip = systemFrameSkip;

   705 

   706 	bool fastForward = speedup;

   707 

   708 #if (defined(WIN32) && !defined(SDL))

   709 	fastForward = (fastForward || theApp.frameSearchSkipping);

   710 	int throttle = theApp.throttle;

   711 	if (theApp.frameSearching && throttle < 100)

   712 		throttle = 100;

   713 #else

   714 	extern int throttle;

   715 #endif

   716 

   717 #if (defined(WIN32) && !defined(SDL))

   718 	if (theApp.aviRecording || theApp.nvVideoLog)

   719 	{

   720 		framesToSkip = 0; // render all frames

   721 	}

   722 	else

   723 	{

   724 		if (fastForward)

   725 			framesToSkip = 9;  // try 6 FPS during speedup

   726 		else if (throttle != 100)

   727 			framesToSkip = (framesToSkip * throttle) / 100;

   728 	}

   729 #endif

   730 

   731 	return framesToSkip;

   732 }

   733 

   734 // sound

   735 

   736 bool systemSoundInit()

   737 {

   738 	if (theApp.sound)

   739 		delete theApp.sound;

   740 

   741 	extern ISound *newDirectSound();

   742 	theApp.sound = newDirectSound();

   743 	return theApp.sound->init();

   744 }

   745 

   746 void systemSoundShutdown()

   747 {

   748 	if (theApp.sound)

   749 		delete theApp.sound;

   750 	theApp.sound = NULL;

   751 }

   752 

   753 void systemSoundPause()

   754 {

   755 	if (theApp.sound)

   756 		theApp.sound->pause();

   757 	soundPaused = 1;

   758 }

   759 

   760 void systemSoundResume()

   761 {

   762 	if (theApp.sound)

   763 		theApp.sound->resume();

   764 	soundPaused = 0;

   765 }

   766 

   767 bool systemSoundIsPaused()

   768 {

   769 //	return soundPaused;

   770 	return !(theApp.sound && theApp.sound->isPlaying());

   771 }

   772 

   773 void systemSoundClearBuffer()

   774 {

   775 	if (theApp.sound)

   776 		theApp.sound->clearAudioBuffer();

   777 }

   778 

   779 void systemSoundReset()

   780 {

   781 	if (theApp.sound)

   782 		theApp.sound->reset();

   783 }

   784 

   785 void systemSoundWriteToBuffer()

   786 {

   787 	if (theApp.sound)

   788 		theApp.sound->write();

   789 }

   790 

   791 bool systemSoundCanChangeQuality()

   792 {

   793 	return true;

   794 }

   795 

   796 bool systemSoundSetQuality(int quality)

   797 {

   798 	if (systemCartridgeType == 0)

   799 		soundSetQuality(quality);

   800 	else

   801 		gbSoundSetQuality(quality);

   802 

   803 	return true;

   804 }

   805 

   806 // emulation

   807 

   808 bool systemIsEmulating()

   809 {

   810 	return emulating != 0;

   811 }

   812 

   813 void systemGbBorderOn()

   814 {

   815 	if (vbaShuttingDown)

   816 		return;

   817 

   818 	if (emulating && systemCartridgeType == 1)

   819 	{

   820 		theApp.updateWindowSize(theApp.videoOption);

   821 	}

   822 }

   823 

   824 bool systemIsRunningGBA()

   825 {

   826 	return (systemCartridgeType == 0);

   827 }

   828 

   829 bool systemIsSpedUp()

   830 {

   831 	return theApp.speedupToggle;

   832 }

   833 

   834 bool systemIsPaused()

   835 {

   836 	return theApp.paused;

   837 }

   838 

   839 void systemSetPause(bool pause)

   840 {

   841 	if (pause)

   842 	{

   843 		capturePrevious	 = false;

   844 		theApp.wasPaused = true;

   845 		theApp.paused	 = true;

   846 		theApp.speedupToggle = false;

   847 		theApp.winPauseNextFrame = false;

   848 		systemSoundPause();

   849 		systemRefreshScreen();;

   850 	}

   851 	else

   852 	{

   853 		theApp.paused	 = false;

   854 		systemSoundResume();

   855 	}

   856 }

   857 

   858 // aka. frame advance

   859 bool systemPauseOnFrame()

   860 {

   861 	if (theApp.winPauseNextFrame)

   862 	{

   863 		if (!theApp.nextframeAccountForLag || !systemCounters.laggedLast)

   864 		{

   865 			theApp.winPauseNextFrame   = false;

   866 			return true;

   867 		}

   868 	}

   869 

   870 	return false;

   871 }

   872 

   873 bool systemLoadBIOS(const char *biosFileName, bool useBiosFile)

   874 {

   875 	bool use = false;

   876 	if (systemCartridgeType == 0)

   877 		use = CPULoadBios(biosFileName, useBiosFile);

   878 	else

   879 		use = false;

   880 	return use;

   881 }

   882 

   883 // FIXME: now platform-independant stuff

   884 // it should be admitted that the naming schema/code organization is a whole mess

   885 // these things should be moved somewhere else

   886 

   887 EmulatedSystemCounters systemCounters =

   888 {

   889 	// frameCount

   890 	0,

   891 	// lagCount

   892 	0,

   893 	// extraCount

   894 	0,

   895 	// lagged

   896 	true,

   897 	// laggedLast

   898 	true,

   899 };

   900 

   901 // VBAxyz stuff are not part of the core.

   902 

   903 void VBAOnEnteringFrameBoundary()

   904 {

   905 	CallRegisteredLuaFunctions(LUACALL_AFTEREMULATION);

   906 

   907 	if (VBALuaRunning())

   908 	{

   909 		VBALuaFrameBoundary();

   910 	}

   911 

   912 	VBAMovieUpdateState();

   913 }

   914 

   915 void VBAOnExitingFrameBoundary()

   916 {

   917 	;

   918 }

   919 

   920 //////////////////////////////////////////////

   921 // ultility

   922 

   923 extern void toolsLog(const char *);

   924 

   925 void log(const char *msg, ...)

   926 {

   927 	CString buffer;

   928 	va_list valist;

   929 

   930 	va_start(valist, msg);

   931 	buffer.FormatV(msg, valist);

   932 

   933 	toolsLog(buffer);

   934 

   935 	va_end(valist);

   936 }
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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