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beetle-lynx-libretro/libretro.cpp
retro-wertz 053b55837c Update to 0.9.47
2019-02-04 03:36:26 +08:00

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#include <stdarg.h>
#include "mednafen/mednafen.h"
#include "mednafen/mednafen-endian.h"
#include "mednafen/mempatcher.h"
#include "mednafen/git.h"
#include "mednafen/general.h"
#include "mednafen/md5.h"
#ifdef NEED_DEINTERLACER
#include "mednafen/video/Deinterlacer.h"
#endif
#include "libretro.h"
static MDFNGI *game;
struct retro_perf_callback perf_cb;
retro_get_cpu_features_t perf_get_cpu_features_cb = NULL;
retro_log_printf_t log_cb;
static retro_video_refresh_t video_cb;
static retro_audio_sample_t audio_cb;
static retro_audio_sample_batch_t audio_batch_cb;
static retro_environment_t environ_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
static bool overscan;
static double last_sound_rate;
static MDFN_PixelFormat last_pixel_format;
static unsigned rot_screen;
static unsigned select_pressed_last_frame;
static MDFN_Surface *surf;
static bool failed_init;
static void hookup_ports(bool force);
static bool initial_ports_hookup = false;
std::string retro_base_directory;
std::string retro_base_name;
std::string retro_save_directory;
static void set_basename(const char *path)
{
const char *base = strrchr(path, '/');
if (!base)
base = strrchr(path, '\\');
if (base)
retro_base_name = base + 1;
else
retro_base_name = path;
retro_base_name = retro_base_name.substr(0, retro_base_name.find_last_of('.'));
}
//
// Copyright (c) 2004 K. Wilkins
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from
// the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
//////////////////////////////////////////////////////////////////////////////
// Handy - An Atari Lynx Emulator //
// Copyright (c) 1996,1997 //
// K. Wilkins //
//////////////////////////////////////////////////////////////////////////////
// System object class //
//////////////////////////////////////////////////////////////////////////////
// //
// This class provides the glue to bind of of the emulation objects //
// together via peek/poke handlers and pass thru interfaces to lower //
// objects, all control of the emulator is done via this class. Update() //
// does most of the work and each call emulates one CPU instruction and //
// updates all of the relevant hardware if required. It must be remembered //
// that if that instruction involves setting SPRGO then, it will cause a //
// sprite painting operation and then a corresponding update of all of the //
// hardware which will usually involve recursive calls to Update, see //
// Mikey SPRGO code for more details. //
// //
// K. Wilkins //
// August 1997 //
// //
//////////////////////////////////////////////////////////////////////////////
// Revision History: //
// ----------------- //
// //
// 01Aug1997 KW Document header added & class documented. //
// //
//////////////////////////////////////////////////////////////////////////////
#define SYSTEM_CPP
//#include <crtdbg.h>
//#define TRACE_SYSTEM
#include "mednafen/lynx/system.h"
#include "mednafen/general.h"
#include "mednafen/mempatcher.h"
CSystem::CSystem(const uint8 *filememory, int32 filesize)
:mCart(NULL),
mRom(NULL),
mMemMap(NULL),
mRam(NULL),
mCpu(NULL),
mMikie(NULL),
mSusie(NULL)
{
mFileType=HANDY_FILETYPE_ILLEGAL;
if(filesize < 11)
{
/* Lynx ROM image is too short. */
}
char clip[11];
memcpy(clip,filememory,11);
clip[4]=0;
clip[10]=0;
if(!strcmp(&clip[6],"BS93")) mFileType=HANDY_FILETYPE_HOMEBREW;
else if(!strcmp(&clip[0],"LYNX")) mFileType=HANDY_FILETYPE_LNX;
else if(filesize==128*1024 || filesize==256*1024 || filesize==512*1024)
{
/* Invalid Cart (type). but 128/256/512k size -> set to RAW and try to load raw rom image */
mFileType=HANDY_FILETYPE_RAW;
}
else
{
/* File format is unknown to module. This will then
* just load the core into an "Insert Game" screen */
}
MDFNMP_Init(65536, 1);
// Create the system objects that we'll use
// Attempt to load the cartridge errors caught above here...
mRom = new CRom(MDFN_MakeFName(MDFNMKF_FIRMWARE, 0, "lynxboot.img").c_str());
// An exception from this will be caught by the level above
switch(mFileType)
{
case HANDY_FILETYPE_RAW:
case HANDY_FILETYPE_LNX:
mCart = new CCart(filememory,filesize);
mRam = new CRam(0,0);
break;
case HANDY_FILETYPE_HOMEBREW:
{
#if 0
static uint8 dummy_cart[CCart::HEADER_RAW_SIZE + 65536] =
{
'L', 'Y', 'N', 'X', 0x00, 0x01, 0x00, 0x00,
0x01, 0x00,
};
mCart = new CCart(dummy_cart, sizeof(dummy_cart));
#else
mCart = new CCart(NULL, 0);
#endif
mRam = new CRam(filememory,filesize);
}
break;
case HANDY_FILETYPE_SNAPSHOT:
case HANDY_FILETYPE_ILLEGAL:
default:
mCart = new CCart(0,0);
mRam = new CRam(0,0);
break;
}
// These can generate exceptions
mMikie = new CMikie(*this);
mSusie = new CSusie(*this);
// Instantiate the memory map handler
mMemMap = new CMemMap(*this);
// Now the handlers are set we can instantiate the CPU as is will use handlers on reset
mCpu = new C65C02(*this);
// Now init is complete do a reset, this will cause many things to be reset twice
// but what the hell, who cares, I don't.....
Reset();
}
CSystem::~CSystem()
{
// Cleanup all our objects
if(mCart!=NULL) delete mCart;
if(mRom!=NULL) delete mRom;
if(mRam!=NULL) delete mRam;
if(mCpu!=NULL) delete mCpu;
if(mMikie!=NULL) delete mMikie;
if(mSusie!=NULL) delete mSusie;
if(mMemMap!=NULL) delete mMemMap;
}
void CSystem::Reset(void)
{
gSystemCycleCount=0;
gNextTimerEvent=0;
gCPUBootAddress=0;
gSystemIRQ=FALSE;
gSystemNMI=FALSE;
gSystemCPUSleep=FALSE;
gSystemHalt=FALSE;
gSuzieDoneTime = 0;
mMemMap->Reset();
mCart->Reset();
mRom->Reset();
mRam->Reset();
mMikie->Reset();
mSusie->Reset();
mCpu->Reset();
// Homebrew hashup
if(mFileType==HANDY_FILETYPE_HOMEBREW)
{
mMikie->PresetForHomebrew();
C6502_REGS regs;
mCpu->GetRegs(regs);
regs.PC=(uint16)gCPUBootAddress;
mCpu->SetRegs(regs);
}
}
// Somewhat of a hack to make sure undrawn lines are black.
bool LynxLineDrawn[256];
static CSystem *lynxie = NULL;
extern MDFNGI EmulatedLynx;
static bool TestMagic(const char *name, MDFNFILE *fp)
{
uint8 data[std::max<unsigned>(CCart::HEADER_RAW_SIZE, CRam::HEADER_RAW_SIZE)];
uint64 rc;
rc = fp->size;
if(rc >= CCart::HEADER_RAW_SIZE && CCart::TestMagic(data, sizeof(data)))
return true;
if(rc >= CRam::HEADER_RAW_SIZE && CRam::TestMagic(data, sizeof(data)))
return true;
return false;
}
static int Load(const uint8_t *data, size_t size)
{
lynxie = new CSystem(data, size);
switch(lynxie->CartGetRotate())
{
case CART_ROTATE_LEFT:
MDFNGameInfo->rotated = MDFN_ROTATE270;
break;
case CART_ROTATE_RIGHT:
MDFNGameInfo->rotated = MDFN_ROTATE90;
break;
}
if(lynxie->mRam->InfoRAMSize)
{
memcpy(MDFNGameInfo->MD5, lynxie->mRam->MD5, 16);
MDFN_printf(_("RAM: %u bytes\n"), lynxie->mRam->InfoRAMSize);
MDFN_printf(_("CRC32: 0x%08x\n"), lynxie->mRam->CRC32());
MDFN_printf(_("RAM MD5: 0x%s\n"), md5_context::asciistr(MDFNGameInfo->MD5, 0).c_str());
}
else
{
memcpy(MDFNGameInfo->MD5, lynxie->mCart->MD5, 16);
MDFN_printf(_("ROM: %dKiB\n"), (lynxie->mCart->InfoROMSize + 1023) / 1024);
MDFN_printf(_("CRC32: 0x%08x\n"), lynxie->mCart->CRC32());
MDFN_printf(_("ROM MD5: 0x%s\n"), md5_context::asciistr(MDFNGameInfo->MD5, 0).c_str());
}
MDFNGameInfo->fps = (uint32)(59.8 * 65536 * 256);
if(MDFN_GetSettingB("lynx.lowpass"))
{
lynxie->mMikie->miksynth.treble_eq(-35);
}
else
{
lynxie->mMikie->miksynth.treble_eq(0);
}
return(1);
}
static void CloseGame(void)
{
if(lynxie)
{
delete lynxie;
lynxie = NULL;
}
}
static uint8 *chee;
static void Emulate(EmulateSpecStruct *espec)
{
espec->DisplayRect.x = 0;
espec->DisplayRect.y = 0;
espec->DisplayRect.w = 160;
espec->DisplayRect.h = 102;
if(espec->VideoFormatChanged)
lynxie->DisplaySetAttributes(espec->surface->format); // FIXME, pitch
if(espec->SoundFormatChanged)
{
lynxie->mMikie->mikbuf.set_sample_rate(espec->SoundRate ? espec->SoundRate : 44100, 60);
lynxie->mMikie->mikbuf.clock_rate((long int)(16000000 / 4));
lynxie->mMikie->mikbuf.bass_freq(60);
lynxie->mMikie->miksynth.volume(0.50);
}
uint16 butt_data = chee[0] | (chee[1] << 8);
lynxie->SetButtonData(butt_data);
MDFNMP_ApplyPeriodicCheats();
memset(LynxLineDrawn, 0, sizeof(LynxLineDrawn[0]) * 102);
lynxie->mMikie->mpSkipFrame = espec->skip;
lynxie->mMikie->mpDisplayCurrent = espec->surface;
lynxie->mMikie->mpDisplayCurrentLine = 0;
lynxie->mMikie->startTS = gSystemCycleCount;
while(lynxie->mMikie->mpDisplayCurrent && (gSystemCycleCount - lynxie->mMikie->startTS) < 700000)
{
lynxie->Update();
// printf("%d ", gSystemCycleCount - lynxie->mMikie->startTS);
}
{
// FIXME, we should integrate this into mikie.*
uint32 color_black = espec->surface->MakeColor(30, 30, 30);
for(int y = 0; y < 102; y++)
{
if(espec->surface->format.bpp == 16)
{
uint16 *row = espec->surface->pixels16 + y * espec->surface->pitchinpix;
if(!LynxLineDrawn[y])
{
for(int x = 0; x < 160; x++)
row[x] = color_black;
}
}
else
{
uint32 *row = espec->surface->pixels + y * espec->surface->pitchinpix;
if(!LynxLineDrawn[y])
{
for(int x = 0; x < 160; x++)
row[x] = color_black;
}
}
}
}
espec->MasterCycles = gSystemCycleCount - lynxie->mMikie->startTS;
if(espec->SoundBuf)
{
lynxie->mMikie->mikbuf.end_frame((gSystemCycleCount - lynxie->mMikie->startTS) >> 2);
espec->SoundBufSize = lynxie->mMikie->mikbuf.read_samples(espec->SoundBuf, espec->SoundBufMaxSize) / 2; // divide by nr audio chn
}
else
espec->SoundBufSize = 0;
}
static void SetInput(int port, const char *type, void *ptr)
{
chee = (uint8 *)ptr;
}
static void TransformInput(void)
{
if(MDFN_GetSettingB("lynx.rotateinput"))
{
static const unsigned bp[4] = { 4, 6, 5, 7 };
const unsigned offs = MDFNGameInfo->rotated;
uint16 butt_data = MDFN_de16lsb(chee);
butt_data = (butt_data & 0xFF0F) |
(((butt_data >> bp[0]) & 1) << bp[(0 + offs) & 3]) |
(((butt_data >> bp[1]) & 1) << bp[(1 + offs) & 3]) |
(((butt_data >> bp[2]) & 1) << bp[(2 + offs) & 3]) |
(((butt_data >> bp[3]) & 1) << bp[(3 + offs) & 3]);
//printf("%d, %04x\n", MDFNGameInfo->rotated, butt_data);
MDFN_en16lsb(chee, butt_data);
}
}
int StateAction(StateMem *sm, int load, int data_only)
{
SFORMAT SystemRegs[] =
{
SFVAR(gSuzieDoneTime),
SFVAR(gSystemCycleCount),
SFVAR(gNextTimerEvent),
SFVAR(gCPUBootAddress),
SFVAR(gSystemIRQ),
SFVAR(gSystemNMI),
SFVAR(gSystemCPUSleep),
SFVAR(gSystemHalt),
SFARRAYN(lynxie->GetRamPointer(), RAM_SIZE, "RAM"),
SFEND
};
MDFNSS_StateAction(sm, load, data_only, SystemRegs, "SYST", false);
if(!lynxie->mSusie->StateAction(sm, load, data_only))
return(0);
if(!lynxie->mMemMap->StateAction(sm, load, data_only))
return(0);
if(!lynxie->mCart->StateAction(sm, load, data_only))
return(0);
if(!lynxie->mMikie->StateAction(sm, load, data_only))
return(0);
if(!lynxie->mCpu->StateAction(sm, load, data_only))
return(0);
return(1);
}
static void SetLayerEnableMask(uint64 mask)
{
}
static void DoSimpleCommand(int cmd)
{
switch(cmd)
{
case MDFN_MSC_POWER:
case MDFN_MSC_RESET: lynxie->Reset(); break;
}
}
static MDFNSetting LynxSettings[] =
{
{ "lynx.rotateinput", MDFNSF_NOFLAGS, "Virtually rotate D-pad along with screen.", NULL, MDFNST_BOOL, "1" },
{ "lynx.lowpass", MDFNSF_CAT_SOUND, "Enable sound output lowpass filter.", NULL, MDFNST_BOOL, "1" },
{ NULL }
};
static const InputDeviceInputInfoStruct IDII[] =
{
{ "a", "A (outer)", 8, IDIT_BUTTON_CAN_RAPID, NULL },
{ "b", "B (inner)", 7, IDIT_BUTTON_CAN_RAPID, NULL },
{ "option_2", "Option 2 (lower)", 5, IDIT_BUTTON_CAN_RAPID, NULL },
{ "option_1", "Option 1 (upper)", 4, IDIT_BUTTON_CAN_RAPID, NULL },
{ "left", "LEFT ←", /*VIRTB_DPAD0_L,*/ 2, IDIT_BUTTON, "right", { "up", "right", "down" } },
{ "right", "RIGHT →", /*VIRTB_DPAD0_R,*/ 3, IDIT_BUTTON, "left", { "down", "left", "up" } },
{ "up", "UP ↑", /*VIRTB_DPAD0_U,*/ 0, IDIT_BUTTON, "down", { "right", "down", "left" } },
{ "down", "DOWN ↓", /*VIRTB_DPAD0_D,*/ 1, IDIT_BUTTON, "up", { "left", "up", "right" } },
{ "pause", "PAUSE", 6, IDIT_BUTTON, NULL },
};
static InputDeviceInfoStruct InputDeviceInfo[] =
{
{
"gamepad",
"Gamepad",
NULL,
NULL,
sizeof(IDII) / sizeof(InputDeviceInputInfoStruct),
IDII,
}
};
static const InputPortInfoStruct PortInfo[] =
{
{ "builtin", "Built-In", sizeof(InputDeviceInfo) / sizeof(InputDeviceInfoStruct), InputDeviceInfo, 0 }
};
static InputInfoStruct InputInfo =
{
sizeof(PortInfo) / sizeof(InputPortInfoStruct),
PortInfo
};
static const FileExtensionSpecStruct KnownExtensions[] =
{
{ ".lnx", "Atari Lynx ROM Image" },
{ NULL, NULL }
};
MDFNGI EmulatedLynx =
{
LynxSettings,
MDFN_MASTERCLOCK_FIXED(16000000),
0,
false, // Multires possible?
160, // lcm_width
102, // lcm_height
NULL, // Dummy
160, // Nominal width
102, // Nominal height
160, // Framebuffer width
102, // Framebuffer height
2, // Number of output sound channels
};
#ifdef NEED_DEINTERLACER
static bool PrevInterlaced;
static Deinterlacer deint;
#endif
#define MEDNAFEN_CORE_NAME_MODULE "lynx"
#define MEDNAFEN_CORE_NAME "Beetle Lynx"
#define MEDNAFEN_CORE_VERSION "v0.9.47"
#define MEDNAFEN_CORE_EXTENSIONS "lnx"
#define MEDNAFEN_CORE_TIMING_FPS 75.0
#define MEDNAFEN_CORE_GEOMETRY_BASE_W 160
#define MEDNAFEN_CORE_GEOMETRY_BASE_H 102
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 160
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 102
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (80.0 / 51.0)
#define FB_WIDTH 160
#define FB_HEIGHT 102
#define FB_MAX_HEIGHT FB_HEIGHT
const char *mednafen_core_str = MEDNAFEN_CORE_NAME;
static void check_system_specs(void)
{
unsigned level = 0;
environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
}
void retro_init(void)
{
struct retro_log_callback log;
if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
log_cb = log.log;
else
log_cb = NULL;
MDFNI_InitializeModule();
const char *dir = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
{
retro_base_directory = dir;
// Make sure that we don't have any lingering slashes, etc, as they break Windows.
size_t last = retro_base_directory.find_last_not_of("/\\");
if (last != std::string::npos)
last++;
retro_base_directory = retro_base_directory.substr(0, last);
MDFNI_Initialize(retro_base_directory.c_str());
}
else
{
/* TODO: Add proper fallback */
if (log_cb)
log_cb(RETRO_LOG_WARN, "System directory is not defined. Fallback on using same dir as ROM for system directory later ...\n");
failed_init = true;
}
if (environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &dir) && dir)
{
// If save directory is defined use it, otherwise use system directory
//retro_save_directory = *dir ? dir : retro_base_directory;
retro_save_directory = dir;
// Make sure that we don't have any lingering slashes, etc, as they break Windows.
size_t last = retro_save_directory.find_last_not_of("/\\");
if (last != std::string::npos)
last++;
retro_save_directory = retro_save_directory.substr(0, last);
}
else
{
/* TODO: Add proper fallback */
if (log_cb)
log_cb(RETRO_LOG_WARN, "Save directory is not defined. Fallback on using SYSTEM directory ...\n");
retro_save_directory = retro_base_directory;
}
#if defined(WANT_16BPP) && defined(FRONTEND_SUPPORTS_RGB565)
enum retro_pixel_format rgb565 = RETRO_PIXEL_FORMAT_RGB565;
if (environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &rgb565) && log_cb)
log_cb(RETRO_LOG_INFO, "Frontend supports RGB565 - will use that instead of XRGB1555.\n");
#endif
if (environ_cb(RETRO_ENVIRONMENT_GET_PERF_INTERFACE, &perf_cb))
perf_get_cpu_features_cb = perf_cb.get_cpu_features;
else
perf_get_cpu_features_cb = NULL;
check_system_specs();
}
void retro_reset(void)
{
DoSimpleCommand(MDFN_MSC_RESET);
}
bool retro_load_game_special(unsigned, const struct retro_game_info *, size_t)
{
return false;
}
static void set_volume (uint32_t *ptr, unsigned number)
{
switch(number)
{
default:
*ptr = number;
break;
}
}
static void check_variables(void)
{
struct retro_variable var = {0};
}
#define MAX_PLAYERS 1
#define MAX_BUTTONS 9
static uint8_t input_buf[MAX_PLAYERS][2] = {{0}};
static void hookup_ports(bool force)
{
if (initial_ports_hookup && !force)
return;
SetInput(0, "gamepad", &input_buf);
initial_ports_hookup = true;
}
static MDFNGI *MDFNI_LoadGame(const uint8_t *, size_t);
bool retro_load_game(const struct retro_game_info *info)
{
if (!info || failed_init)
return false;
#ifdef WANT_32BPP
enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_XRGB8888;
if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt))
{
if (log_cb)
log_cb(RETRO_LOG_ERROR, "Pixel format XRGB8888 not supported by platform, cannot use %s.\n", MEDNAFEN_CORE_NAME);
return false;
}
#endif
overscan = false;
environ_cb(RETRO_ENVIRONMENT_GET_OVERSCAN, &overscan);
game = MDFNI_LoadGame((const uint8_t *)info->data, info->size);
if (!game)
return false;
MDFN_PixelFormat pix_fmt(MDFN_COLORSPACE_RGB, 16, 8, 0, 24);
memset(&last_pixel_format, 0, sizeof(MDFN_PixelFormat));
surf = new MDFN_Surface(NULL, FB_WIDTH, FB_HEIGHT, FB_WIDTH, pix_fmt);
#ifdef NEED_DEINTERLACER
PrevInterlaced = false;
deint.ClearState();
#endif
hookup_ports(true);
rot_screen = 0;
select_pressed_last_frame = 0;
check_variables();
return game;
}
void retro_unload_game()
{
if (!game)
return;
MDFNI_CloseGame();
}
// Hardcoded for PSX. No reason to parse lots of structures ...
// See mednafen/psx/input/gamepad.cpp
static void update_input(void)
{
static unsigned map[4][9] = {
{
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_START
},
{
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_START
},
{
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_START
},
{
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_START
},
};
for (unsigned j = 0; j < MAX_PLAYERS; j++)
{
uint16_t input_state = 0;
for (unsigned i = 0; i < MAX_BUTTONS; i++)
input_state |= input_state_cb(j, RETRO_DEVICE_JOYPAD, 0, map[rot_screen][i]) ? (1 << i) : 0;
// Input data must be little endian.
input_buf[j][0] = (input_state >> 0) & 0xff;
input_buf[j][1] = (input_state >> 8) & 0xff;
}
unsigned select_button = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT);
if (select_button && !select_pressed_last_frame)
{
rot_screen++;
if (rot_screen > 3)
rot_screen = 0;
const float aspect[2] = { (80.0 / 51.0), (51.0 / 80.0) };
const unsigned rot_angle[4] = { 0, 1, 2, 3 };
struct retro_game_geometry new_geom = { FB_WIDTH, FB_HEIGHT, FB_WIDTH, FB_HEIGHT, aspect[rot_screen & 1] };
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, (void*)&new_geom);
environ_cb(RETRO_ENVIRONMENT_SET_ROTATION, (void*)&rot_angle[rot_screen]);
}
select_pressed_last_frame = select_button;
}
static uint64_t video_frames, audio_frames;
void retro_run()
{
input_poll_cb();
update_input();
static int16_t sound_buf[0x10000];
static MDFN_Rect rects[FB_MAX_HEIGHT];
rects[0].w = ~0;
EmulateSpecStruct spec = {0};
spec.surface = surf;
spec.SoundRate = 44100;
spec.SoundBuf = sound_buf;
spec.LineWidths = rects;
spec.SoundBufMaxSize = sizeof(sound_buf) / 2;
spec.SoundVolume = 1.0;
spec.soundmultiplier = 1.0;
spec.SoundBufSize = 0;
spec.VideoFormatChanged = false;
spec.SoundFormatChanged = false;
if (memcmp(&last_pixel_format, &spec.surface->format, sizeof(MDFN_PixelFormat)))
{
spec.VideoFormatChanged = TRUE;
last_pixel_format = spec.surface->format;
}
if (spec.SoundRate != last_sound_rate)
{
spec.SoundFormatChanged = true;
last_sound_rate = spec.SoundRate;
}
Emulate(&spec);
#ifdef NEED_DEINTERLACER
if (spec.InterlaceOn)
{
if (!PrevInterlaced)
deint.ClearState();
deint.Process(spec.surface, spec.DisplayRect, spec.LineWidths, spec.InterlaceField);
PrevInterlaced = true;
spec.InterlaceOn = false;
spec.InterlaceField = 0;
}
else
PrevInterlaced = false;
#endif
int16 *const SoundBuf = spec.SoundBuf + spec.SoundBufSizeALMS * 2;
int32 SoundBufSize = spec.SoundBufSize - spec.SoundBufSizeALMS;
const int32 SoundBufMaxSize = spec.SoundBufMaxSize - spec.SoundBufSizeALMS;
spec.SoundBufSize = spec.SoundBufSizeALMS + SoundBufSize;
unsigned width = spec.DisplayRect.w;
unsigned height = spec.DisplayRect.h;
#if defined(WANT_32BPP)
const uint32_t *pix = surf->pixels;
video_cb(pix, width, height, FB_WIDTH << 2);
#elif defined(WANT_16BPP)
const uint16_t *pix = surf->pixels16;
video_cb(pix, width, height, FB_WIDTH << 1);
#endif
video_frames++;
audio_frames += spec.SoundBufSize;
audio_batch_cb(spec.SoundBuf, spec.SoundBufSize);
bool updated = false;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
check_variables();
}
void retro_get_system_info(struct retro_system_info *info)
{
memset(info, 0, sizeof(*info));
info->library_name = MEDNAFEN_CORE_NAME;
#ifndef GIT_VERSION
#define GIT_VERSION ""
#endif
info->library_version = MEDNAFEN_CORE_VERSION GIT_VERSION;
info->need_fullpath = false;
info->valid_extensions = MEDNAFEN_CORE_EXTENSIONS;
info->block_extract = false;
}
void retro_get_system_av_info(struct retro_system_av_info *info)
{
memset(info, 0, sizeof(*info));
info->timing.fps = MEDNAFEN_CORE_TIMING_FPS;
info->timing.sample_rate = 44100.0;
info->geometry.base_width = MEDNAFEN_CORE_GEOMETRY_BASE_W;
info->geometry.base_height = MEDNAFEN_CORE_GEOMETRY_BASE_H;
info->geometry.max_width = MEDNAFEN_CORE_GEOMETRY_MAX_W;
info->geometry.max_height = MEDNAFEN_CORE_GEOMETRY_MAX_H;
info->geometry.aspect_ratio = MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO;
}
void retro_deinit()
{
delete surf;
surf = NULL;
if (log_cb)
{
log_cb(RETRO_LOG_INFO, "[%s]: Samples / Frame: %.5f\n",
mednafen_core_str, (double)audio_frames / video_frames);
log_cb(RETRO_LOG_INFO, "[%s]: Estimated FPS: %.5f\n",
mednafen_core_str, (double)video_frames * 44100 / audio_frames);
}
}
unsigned retro_get_region(void)
{
return RETRO_REGION_NTSC; // FIXME: Regions for other cores.
}
unsigned retro_api_version(void)
{
return RETRO_API_VERSION;
}
void retro_set_controller_port_device(unsigned in_port, unsigned device)
{
}
void retro_set_environment(retro_environment_t cb)
{
environ_cb = cb;
}
void retro_set_audio_sample(retro_audio_sample_t cb)
{
audio_cb = cb;
}
void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb)
{
audio_batch_cb = cb;
}
void retro_set_input_poll(retro_input_poll_t cb)
{
input_poll_cb = cb;
}
void retro_set_input_state(retro_input_state_t cb)
{
input_state_cb = cb;
}
void retro_set_video_refresh(retro_video_refresh_t cb)
{
video_cb = cb;
}
static size_t serialize_size;
size_t retro_serialize_size(void)
{
StateMem st;
st.data = NULL;
st.loc = 0;
st.len = 0;
st.malloced = 0;
st.initial_malloc = 0;
if (!MDFNSS_SaveSM(&st, 0, 0, NULL, NULL, NULL))
return 0;
free(st.data);
return serialize_size = st.len;
}
bool retro_serialize(void *data, size_t size)
{
StateMem st;
bool ret = false;
uint8_t *_dat = (uint8_t*)malloc(size);
if (!_dat)
return false;
/* Mednafen can realloc the buffer so we need to ensure this is safe. */
st.data = _dat;
st.loc = 0;
st.len = 0;
st.malloced = size;
st.initial_malloc = 0;
ret = MDFNSS_SaveSM(&st, 0, 0, NULL, NULL, NULL);
memcpy(data, st.data, size);
free(st.data);
return ret;
}
bool retro_unserialize(const void *data, size_t size)
{
StateMem st;
memset(&st, 0, sizeof(st));
st.data = (uint8_t*)data;
st.len = size;
return MDFNSS_LoadSM(&st, 0, 0);
}
void *retro_get_memory_data(unsigned type)
{
if (lynxie && type == RETRO_MEMORY_SYSTEM_RAM)
return lynxie->GetRamPointer();
return NULL;
}
size_t retro_get_memory_size(unsigned type)
{
if (type == RETRO_MEMORY_SYSTEM_RAM)
return 1024 * 64;
return 0;
}
void retro_cheat_reset(void)
{}
void retro_cheat_set(unsigned, bool, const char *)
{}
#ifdef _WIN32
static void sanitize_path(std::string &path)
{
size_t size = path.size();
for (size_t i = 0; i < size; i++)
if (path[i] == '/')
path[i] = '\\';
}
#endif
// Use a simpler approach to make sure that things go right for libretro.
std::string MDFN_MakeFName(MakeFName_Type type, int id1, const char *cd1)
{
char slash;
#ifdef _WIN32
slash = '\\';
#else
slash = '/';
#endif
std::string ret;
switch (type)
{
case MDFNMKF_SAV:
ret = retro_save_directory +slash + retro_base_name +
std::string(".") + std::string(cd1);
break;
case MDFNMKF_FIRMWARE:
ret = retro_base_directory + slash + std::string(cd1);
#ifdef _WIN32
sanitize_path(ret); // Because Windows path handling is mongoloid.
#endif
break;
default:
break;
}
if (log_cb)
log_cb(RETRO_LOG_INFO, "MDFN_MakeFName: %s\n", ret.c_str());
return ret;
}
void MDFND_DispMessage(unsigned char *str)
{
if (log_cb)
log_cb(RETRO_LOG_INFO, "%s\n", str);
}
void MDFND_Message(const char *str)
{
if (log_cb)
log_cb(RETRO_LOG_INFO, "%s\n", str);
}
void MDFND_MidSync(const EmulateSpecStruct *)
{}
void MDFN_MidLineUpdate(EmulateSpecStruct *espec, int y)
{
//MDFND_MidLineUpdate(espec, y);
}
void MDFND_PrintError(const char* err)
{
if (log_cb)
log_cb(RETRO_LOG_ERROR, "%s\n", err);
}
extern MDFNGI EmulatedLynx;
MDFNGI *MDFNGameInfo = &EmulatedLynx;
/* forward declarations */
extern void MDFND_DispMessage(unsigned char *str);
void MDFN_DispMessage(const char *format, ...)
{
va_list ap;
va_start(ap,format);
char *msg = new char[4096];
vsnprintf(msg, 4096, format,ap);
va_end(ap);
MDFND_DispMessage((UTF8*)msg);
}
void MDFN_ResetMessages(void)
{
MDFND_DispMessage(NULL);
}
static MDFNGI *MDFNI_LoadGame(const uint8_t *data, size_t size)
{
if (!data || !size) {
MDFN_indent(2);
goto error;
}
MDFNGameInfo = &EmulatedLynx;
MDFN_indent(1);
MDFN_printf(_("Using module: lynx\n\n"));
MDFN_indent(1);
//
// Load per-game settings
//
// Maybe we should make a "pgcfg" subdir, and automatically load all files in it?
// End load per-game settings
//
if(Load(data, size) <= 0)
goto error;
MDFN_LoadGameCheats(NULL);
MDFNMP_InstallReadPatches();
MDFN_ResetMessages(); // Save state, status messages, etc.
MDFN_indent(-2);
return(MDFNGameInfo);
error:
MDFN_indent(-2);
MDFNGameInfo = NULL;
return NULL;
}
void MDFNI_CloseGame(void)
{
if(!MDFNGameInfo)
return;
MDFN_FlushGameCheats(0);
CloseGame();
MDFNMP_Kill();
MDFNGameInfo = NULL;
}
bool MDFNI_InitializeModule(void)
{
return(1);
}
int MDFNI_Initialize(const char *basedir)
{
return(1);
}
static int curindent = 0;
void MDFN_indent(int indent)
{
curindent += indent;
}
static uint8 lastchar = 0;
void MDFN_printf(const char *format, ...)
{
char *format_temp;
char *temp;
unsigned int x, newlen;
va_list ap;
va_start(ap,format);
// First, determine how large our format_temp buffer needs to be.
uint8 lastchar_backup = lastchar; // Save lastchar!
for(newlen=x=0;x<strlen(format);x++)
{
if(lastchar == '\n' && format[x] != '\n')
{
int y;
for(y=0;y<curindent;y++)
newlen++;
}
newlen++;
lastchar = format[x];
}
format_temp = (char *)malloc(newlen + 1); // Length + NULL character, duh
// Now, construct our format_temp string
lastchar = lastchar_backup; // Restore lastchar
for(newlen=x=0;x<strlen(format);x++)
{
if(lastchar == '\n' && format[x] != '\n')
{
int y;
for(y=0;y<curindent;y++)
format_temp[newlen++] = ' ';
}
format_temp[newlen++] = format[x];
lastchar = format[x];
}
format_temp[newlen] = 0;
temp = new char[4096];
vsnprintf(temp, 4096, format_temp, ap);
free(format_temp);
MDFND_Message(temp);
delete[] temp;
va_end(ap);
}
void MDFN_PrintError(const char *format, ...)
{
char *temp;
va_list ap;
va_start(ap, format);
temp = new char[4096];
vsnprintf(temp, 4096, format, ap);
MDFND_PrintError(temp);
delete[] temp;
va_end(ap);
}
void MDFN_DebugPrintReal(const char *file, const int line, const char *format, ...)
{
char *temp;
va_list ap;
va_start(ap, format);
temp = new char[4096];
vsnprintf(temp, 4096, format, ap);
fprintf(stderr, "%s:%d %s\n", file, line, temp);
delete[] temp;
va_end(ap);
}
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