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Merge branch 'nes-emulator' of ssh://gitlab.axiodl.com:6431/AxioDL/urde into nes-emulator

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This commit is contained in:
Jack Andersen
2018-02-02 17:13:24 -10:00
parent 5e8f4d4f12 acf2dab66f
commit fa44ab57e8
11 changed files with 438 additions and 88 deletions
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238
NESEmulator/CNESEmulator.cpp
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@@ -31,7 +31,7 @@ extern "C"
#include "fixNES/mapper_h/nsf.h"
/*
* Copyright (C) 2017 FIX94
* Portions Copyright (C) 2017 FIX94
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
@@ -78,7 +78,7 @@ static uint32_t emuPrgRAMsize = 0;
uint32_t textureImage[0xF000];
bool nesPause = false;
bool ppuDebugPauseFrame = false;
bool doOverscan = true;
bool doOverscan = false;
bool nesPAL = false;
bool nesEmuNSFPlayback = false;
@@ -135,6 +135,9 @@ static uint16_t vrc7Clock = 1;
extern bool fdsSwitch;
bool apuCycleURDE();
uint8_t* ppuGetVRAM();
int audioUpdate()
{
if (!EmulatorInst)
@@ -250,6 +253,7 @@ void CNESEmulator::InitializeEmulator()
CGraphics::CommitResources([this](boo::IGraphicsDataFactory::Context& ctx)
{
// Nearest-neighbor FTW!
m_texture = ctx.newDynamicTexture(VISIBLE_DOTS, linesToDraw,
boo::TextureFormat::RGBA8,
boo::TextureClampMode::ClampToEdgeNearest);
@@ -330,6 +334,8 @@ CNESEmulator::~CNESEmulator()
int CNESEmulator::audioUpdate()
{
int origProcBufs = m_procBufs;
uint8_t *data = apuGetBuf();
if(data != NULL && m_procBufs)
{
@@ -341,13 +347,13 @@ int CNESEmulator::audioUpdate()
m_headBuf = 0;
}
//if (!m_procBufs)
//if (!origProcBufs)
//printf("OVERRUN\n");
return m_procBufs;
return origProcBufs;
}
static const size_t AudioFrameSz = 2 * sizeof(int16_t);
static constexpr size_t AudioFrameSz = 2 * sizeof(int16_t);
size_t CNESEmulator::supplyAudio(boo::IAudioVoice& voice, size_t frames, int16_t* data)
{
@@ -380,18 +386,18 @@ size_t CNESEmulator::supplyAudio(boo::IAudioVoice& voice, size_t frames, int16_t
return frames;
}
#define CATCHUP_SKIP 0
#define CATCHUP_SKIP 1
#if CATCHUP_SKIP
static int catchupFrames = 0;
#endif
void CNESEmulator::NesEmuMainLoop()
void CNESEmulator::NesEmuMainLoop(bool forceDraw)
{
int start = GetTickCount();
int loopCount = 0;
do
{
if((!emuSkipVsync && emuRenderFrame) || nesPause)
if(emuRenderFrame || nesPause)
{
#if DEBUG_MAIN_CALLS
emuMainTimesSkipped++;
@@ -409,26 +415,36 @@ void CNESEmulator::NesEmuMainLoop()
++loopCount;
if(mainClock == cpuCycleTimer)
{
//runs every 8th cpu clock
if(apuClock == 8)
//URDE uses this loop to pre-fill audio buffers,
//rather than executing multiple frame loops
bool breakout = false;
do
{
if(!apuCycle())
//runs every 8th cpu clock
if(apuClock == 8)
{
if(!apuCycleURDE() && !forceDraw)
{
#if DEBUG_MAIN_CALLS
emuMainTimesSkipped++;
emuMainTimesSkipped++;
#endif
#if CATCHUP_SKIP
catchupFrames = 0;
catchupFrames = 0;
#endif
//printf("LC SKIP\n");
break;
//printf("LC SKIP\n");
breakout = true;
break;
}
apuClock = 1;
}
apuClock = 1;
}
else
apuClock++;
//runs every cpu cycle
apuClockTimers();
else
apuClock++;
//runs every cpu cycle
apuClockTimers();
} while (emuSkipVsync);
if (breakout)
break;
//main CPU clock
if(!cpuCycle())
exit(EXIT_SUCCESS);
@@ -490,7 +506,8 @@ void CNESEmulator::NesEmuMainLoop()
vrc7Clock++;
}
if ((loopCount % 5000) == 0 && GetTickCount() - start >= 14)
#if 1
if (!forceDraw && (loopCount % 10000) == 0 && GetTickCount() - start >= 14)
{
#if CATCHUP_SKIP
if (catchupFrames < 50)
@@ -498,28 +515,29 @@ void CNESEmulator::NesEmuMainLoop()
#endif
break;
}
#endif
}
while(true);
#if 0
int end = GetTickCount();
printf("%dms\n", end - start);
printf("%dms %d %d\n", end - start, loopCount, m_procBufs);
#endif
#if DEBUG_MAIN_CALLS
emuMainTimesCalled++;
int end = GetTickCount();
int end = GetTickCount();
//printf("%dms\n", end - start);
emuMainTotalElapsed += end - emuMainFrameStart;
if(emuMainTotalElapsed >= 1000)
{
printf("\r%i calls, %i skips ", emuMainTimesCalled, emuMainTimesSkipped);
emuMainTotalElapsed += end - emuMainFrameStart;
if(emuMainTotalElapsed >= 1000)
{
printf("\r%i calls, %i skips ", emuMainTimesCalled, emuMainTimesSkipped);
fflush(stdout);
emuMainTimesCalled = 0;
emuMainTimesSkipped = 0;
emuMainTotalElapsed = 0;
}
emuMainFrameStart = end;
emuMainTimesCalled = 0;
emuMainTimesSkipped = 0;
emuMainTotalElapsed = 0;
}
emuMainFrameStart = end;
#endif
}
@@ -745,16 +763,142 @@ void CNESEmulator::DecompressROM(u8* dataIn, u8* dataOut, u32 dataOutLen, u8 des
void CNESEmulator::ProcessUserInput(const CFinalInput& input, int)
{
if (input.ControllerIdx() != 0)
return;
if (GetPasswordEntryState() != EPasswordEntryState::NotPasswordScreen)
{
// Don't swap A/B
inValReads[BUTTON_A] = input.DA();
inValReads[BUTTON_B] = input.DB();
}
else
{
// Prime controls (B jumps, A shoots)
inValReads[BUTTON_B] = input.DA() | input.DY();
inValReads[BUTTON_A] = input.DB() | input.DX();
}
inValReads[BUTTON_UP] = input.DDPUp() | input.DLAUp();
inValReads[BUTTON_DOWN] = input.DDPDown() | input.DLADown();
inValReads[BUTTON_LEFT] = input.DDPLeft() | input.DLALeft();
inValReads[BUTTON_RIGHT] = input.DDPRight() | input.DLARight();
inValReads[BUTTON_A] = input.DA();
inValReads[BUTTON_B] = input.DB();
inValReads[BUTTON_SELECT] = input.DZ();
inValReads[BUTTON_START] = input.DStart();
if (input.PL())
x20_wantsQuit = true;
}
bool CNESEmulator::CheckForGameOver(const u8* vram, u8* passwordOut)
{
// "PASS WORD"
if (memcmp(vram + 0x14B, "\x19\xa\x1c\x1c\xff\x20\x18\x1b\xd", 9))
return false;
int chOff = 0;
int encOff = 0;
u8 pwOut[18];
for (int i=0 ; i<24 ; ++i)
{
u8 chName = vram[0x1A9 + chOff];
++chOff;
if (chOff == 0x6 || chOff == 0x46)
++chOff; // mid-line space
else if (chOff == 0xd)
chOff = 64; // 2nd line
if (chName > 0x3f)
return false;
switch (i & 0x3)
{
case 0:
pwOut[encOff] = chName;
break;
case 1:
pwOut[encOff] |= chName << 6;
++encOff;
pwOut[encOff] = chName >> 2;
break;
case 2:
pwOut[encOff] |= chName << 4;
++encOff;
pwOut[encOff] = chName >> 4;
break;
case 3:
pwOut[encOff] |= chName << 2;
++encOff;
break;
default:
break;
}
}
if (passwordOut)
memmove(passwordOut, pwOut, 18);
return true;
}
CNESEmulator::EPasswordEntryState CNESEmulator::CheckForPasswordEntryScreen(const u8* vram)
{
// "PASS WORD PLEASE"
if (memcmp(vram + 0x88, "\x19\xa\x1c\x1c\xff\x20\x18\x1b\xd\xff\x19\x15\xe\xa\x1c\xe", 16))
return EPasswordEntryState::NotPasswordScreen;
for (int i=0 ; i<13 ; ++i)
if (vram[0x109 + i] < 0x40 || vram[0x149 + i] < 0x40)
return EPasswordEntryState::Entered;
return EPasswordEntryState::NotEntered;
}
bool CNESEmulator::SetPasswordIntoEntryScreen(u8* vram, u8* wram, const u8* password)
{
if (CheckForPasswordEntryScreen(vram) != EPasswordEntryState::NotEntered)
return false;
int i;
for (i=0 ; i<18 ; ++i)
if (password[i])
break;
if (i == 18)
return false;
int encOff = 0;
int chOff = 0;
u32 lastWord = 0;
for (i=0 ; i<24 ; ++i)
{
switch (i & 0x3)
{
case 0:
lastWord = password[encOff];
++encOff;
break;
case 1:
lastWord = (lastWord >> 6) | (u32(password[encOff]) << 2);
++encOff;
break;
case 2:
lastWord = (lastWord >> 6) | (u32(password[encOff]) << 4);
++encOff;
break;
case 3:
lastWord = (lastWord >> 6);
break;
default:
break;
}
u8 chName = u8(lastWord & 0x3f);
wram[0x99a + i] = chName;
vram[0x109 + chOff] = chName;
++chOff;
if (chOff == 0x6 || chOff == 0x46)
++chOff; // mid-line space
else if (chOff == 0xd)
chOff = 64; // 2nd line
}
return true;
}
void CNESEmulator::Update()
@@ -769,7 +913,19 @@ void CNESEmulator::Update()
}
else
{
NesEmuMainLoop();
bool gameOver = CheckForGameOver(ppuGetVRAM(), x21_passwordFromNES);
x34_passwordEntryState = CheckForPasswordEntryScreen(ppuGetVRAM());
if (x34_passwordEntryState == EPasswordEntryState::NotEntered && x38_passwordPending)
{
SetPasswordIntoEntryScreen(ppuGetVRAM(), emuPrgRAM, x39_passwordToNES);
x38_passwordPending = false;
}
if (gameOver && !x20_gameOver)
for (int i=0 ; i<3 ; ++i) // Three draw loops to ensure password display
NesEmuMainLoop(true);
else
NesEmuMainLoop();
x20_gameOver = gameOver;
}
}
@@ -791,10 +947,10 @@ void CNESEmulator::Draw(const zeus::CColor& mulColor, bool filtering)
CGraphics::DrawArray(0, 4);
}
void CNESEmulator::LoadState(const u8* state)
void CNESEmulator::LoadPassword(const u8* state)
{
memmove(x39_loadState, state, 18);
x38_stateLoaded = true;
memmove(x39_passwordToNES, state, 18);
x38_passwordPending = true;
}
}