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beetle-psx-libretro/libretro.cpp

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#include "mednafen/mednafen.h"
#include "mednafen/git.h"
#include "mednafen/general.h"
#ifdef NEED_DEINTERLACER
#include "mednafen/video/Deinterlacer.h"
#endif
#include <iostream>
#include "libretro.h"
static MDFNGI *game;
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 double last_sound_rate;
static MDFN_PixelFormat last_pixel_format;
static MDFN_Surface *surf;
static bool failed_init;
std::string retro_base_directory;
std::string retro_base_name;
#ifdef NEED_DEINTERLACER
static bool PrevInterlaced;
static Deinterlacer deint;
#endif
#if defined(WANT_PSX_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "psx"
#define MEDNAFEN_CORE_NAME "Mednafen PSX"
#define MEDNAFEN_CORE_VERSION "v0.9.26"
#define MEDNAFEN_CORE_EXTENSIONS "cue|CUE|toc|TOC"
#define MEDNAFEN_CORE_TIMING_FPS 59.85398
#define MEDNAFEN_CORE_GEOMETRY_BASE_W 320
#define MEDNAFEN_CORE_GEOMETRY_BASE_H 240
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 640
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 480
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 680
#define FB_HEIGHT 576
#elif defined(WANT_PCE_FAST_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "pce_fast"
#define MEDNAFEN_CORE_NAME "Mednafen PCE Fast"
#define MEDNAFEN_CORE_VERSION "v0.9.26"
#define MEDNAFEN_CORE_EXTENSIONS "pce|PCE|cue|CUE|zip|ZIP"
#define MEDNAFEN_CORE_TIMING_FPS 59.82
#define MEDNAFEN_CORE_GEOMETRY_BASE_W (game->nominal_width)
#define MEDNAFEN_CORE_GEOMETRY_BASE_H (game->nominal_height)
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 512
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 242
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 512
#define FB_HEIGHT 242
#elif defined(WANT_WSWAN_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "wswan"
#define MEDNAFEN_CORE_NAME "Mednafen WonderSwan"
#define MEDNAFEN_CORE_VERSION "v0.9.22"
#define MEDNAFEN_CORE_EXTENSIONS "ws|WS|wsc|WSC|zip|ZIP"
#define MEDNAFEN_CORE_TIMING_FPS 75.47
#define MEDNAFEN_CORE_GEOMETRY_BASE_W (game->nominal_width)
#define MEDNAFEN_CORE_GEOMETRY_BASE_H (game->nominal_height)
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 224
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 144
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 224
#define FB_HEIGHT 144
#elif defined(WANT_NGP_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "ngp"
#define MEDNAFEN_CORE_NAME "Mednafen Neopop"
#define MEDNAFEN_CORE_VERSION "v0.9.26"
#define MEDNAFEN_CORE_EXTENSIONS "ngp|NGP|ngc|NGC|zip|ZIP"
#define MEDNAFEN_CORE_TIMING_FPS 60.25
#define MEDNAFEN_CORE_GEOMETRY_BASE_W (game->nominal_width)
#define MEDNAFEN_CORE_GEOMETRY_BASE_H (game->nominal_height)
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 160
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 152
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 160
#define FB_HEIGHT 152
#elif defined(WANT_GBA_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "gba"
#define MEDNAFEN_CORE_NAME "Mednafen VBA-M"
#define MEDNAFEN_CORE_VERSION "v0.9.26"
#define MEDNAFEN_CORE_EXTENSIONS "gba|GBA|zip|ZIP"
#define MEDNAFEN_CORE_TIMING_FPS 59.73
#define MEDNAFEN_CORE_GEOMETRY_BASE_W (game->nominal_width)
#define MEDNAFEN_CORE_GEOMETRY_BASE_H (game->nominal_height)
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 240
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 160
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 240
#define FB_HEIGHT 160
#elif defined(WANT_SNES_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "snes"
#define MEDNAFEN_CORE_NAME "Mednafen bSNES"
#define MEDNAFEN_CORE_VERSION "v0.9.26"
#define MEDNAFEN_CORE_EXTENSIONS "smc|SMC|fig|FIG|bs|BS|st|ST|sfc|SFC|zip|ZIP"
#define MEDNAFEN_CORE_TIMING_FPS 60.10
#define MEDNAFEN_CORE_GEOMETRY_BASE_W (game->nominal_width)
#define MEDNAFEN_CORE_GEOMETRY_BASE_H (game->nominal_height)
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 512
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 512
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 512
#define FB_HEIGHT 512
#elif defined(WANT_VB_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "vb"
#define MEDNAFEN_CORE_NAME "Mednafen VB"
#define MEDNAFEN_CORE_VERSION "v0.9.26"
#define MEDNAFEN_CORE_EXTENSIONS "vb|VB|vboy|VBOY|bin|BIN|zip|ZIP"
#define MEDNAFEN_CORE_TIMING_FPS 50.27
#define MEDNAFEN_CORE_GEOMETRY_BASE_W (game->nominal_width)
#define MEDNAFEN_CORE_GEOMETRY_BASE_H (game->nominal_height)
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 384
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 224
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 384
#define FB_HEIGHT 224
#elif defined(WANT_PCFX_EMU)
#define MEDNAFEN_CORE_NAME_MODULE "pcfx"
#define MEDNAFEN_CORE_NAME "Mednafen PCFX"
#define MEDNAFEN_CORE_VERSION "v0.9.26"
#define MEDNAFEN_CORE_EXTENSIONS "cue|CUE"
#define MEDNAFEN_CORE_TIMING_FPS 59.94
#define MEDNAFEN_CORE_GEOMETRY_BASE_W (game->nominal_width)
#define MEDNAFEN_CORE_GEOMETRY_BASE_H (game->nominal_height)
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 341
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 480
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (4.0 / 3.0)
#define FB_WIDTH 344
#define FB_HEIGHT 480
#endif
#ifdef WANT_16BPP
static uint16_t mednafen_buf[FB_WIDTH * FB_HEIGHT];
#else
static uint32_t mednafen_buf[FB_WIDTH * FB_HEIGHT];
#endif
const char *mednafen_core_str = MEDNAFEN_CORE_NAME;
static void check_system_specs(void)
{
unsigned level = 0;
#if defined(WANT_PSX_EMU)
// Hints that we need a fairly powerful system to run this.
level = 3;
#endif
environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
}
void retro_init()
{
std::vector<MDFNGI*> ext;
MDFNI_InitializeModules(ext);
const char *dir = NULL;
std::vector<MDFNSetting> settings;
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 */
fprintf(stderr, "System directory is not defined. Fallback on using same dir as ROM for system directory later ...\n");
failed_init = true;
}
#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))
fprintf(stderr, "Frontend supports RGB565 - will use that instead of XRGB1555.\n");
#endif
check_system_specs();
}
void retro_reset()
{
game->DoSimpleCommand(MDFN_MSC_RESET);
}
bool retro_load_game_special(unsigned, const struct retro_game_info *, size_t)
{
return false;
}
bool retro_load_game(const struct retro_game_info *info)
{
if (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))
{
fprintf(stderr, "Pixel format XRGB8888 not supported by platform, cannot use %s.\n", MEDNAFEN_CORE_NAME);
return false;
}
#endif
const char *base = strrchr(info->path, '/');
if (!base)
base = strrchr(info->path, '\\');
if (base)
retro_base_name = base + 1;
else
retro_base_name = info->path;
retro_base_name = retro_base_name.substr(0, retro_base_name.find_last_of('.'));
game = MDFNI_LoadGame(MEDNAFEN_CORE_NAME_MODULE, info->path);
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(mednafen_buf, FB_WIDTH, FB_HEIGHT, FB_WIDTH, pix_fmt);
#ifdef NEED_DEINTERLACER
PrevInterlaced = false;
deint.ClearState();
#endif
return game;
}
void retro_unload_game()
{
MDFNI_CloseGame();
}
static unsigned retro_devices[2];
// Hardcoded for PSX. No reason to parse lots of structures ...
// See mednafen/psx/input/gamepad.cpp
static void update_input(void)
{
#if defined(WANT_PSX_EMU)
union
{
uint32_t u32[2][1 + 8];
uint8_t u8[2][2 * sizeof(uint16_t) + 8 * sizeof(uint32_t)];
} static buf;
uint16_t input_buf[2] = {0};
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_SELECT,
RETRO_DEVICE_ID_JOYPAD_L3,
RETRO_DEVICE_ID_JOYPAD_R3,
RETRO_DEVICE_ID_JOYPAD_START,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_L2,
RETRO_DEVICE_ID_JOYPAD_R2,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_X,
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_Y,
};
for (unsigned j = 0; j < 2; j++)
{
for (unsigned i = 0; i < 16; i++)
input_buf[j] |= input_state_cb(j, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
}
// Buttons.
buf.u8[0][0] = (input_buf[0] >> 0) & 0xff;
buf.u8[0][1] = (input_buf[0] >> 8) & 0xff;
buf.u8[1][0] = (input_buf[1] >> 0) & 0xff;
buf.u8[1][1] = (input_buf[1] >> 8) & 0xff;
// Analogs
for (unsigned j = 0; j < 2; j++)
{
int analog_left_x = input_state_cb(j, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT,
RETRO_DEVICE_ID_ANALOG_X);
int analog_left_y = input_state_cb(j, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT,
RETRO_DEVICE_ID_ANALOG_Y);
int analog_right_x = input_state_cb(j, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT,
RETRO_DEVICE_ID_ANALOG_X);
int analog_right_y = input_state_cb(j, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT,
RETRO_DEVICE_ID_ANALOG_Y);
uint32_t r_right = analog_right_x > 0 ? analog_right_x : 0;
uint32_t r_left = analog_right_x < 0 ? -analog_right_x : 0;
uint32_t r_down = analog_right_y > 0 ? analog_right_y : 0;
uint32_t r_up = analog_right_y < 0 ? -analog_right_y : 0;
uint32_t l_right = analog_left_x > 0 ? analog_left_x : 0;
uint32_t l_left = analog_left_x < 0 ? -analog_left_x : 0;
uint32_t l_down = analog_left_y > 0 ? analog_left_y : 0;
uint32_t l_up = analog_left_y < 0 ? -analog_left_y : 0;
buf.u32[j][1] = r_right;
buf.u32[j][2] = r_left;
buf.u32[j][3] = r_down;
buf.u32[j][4] = r_up;
buf.u32[j][5] = l_right;
buf.u32[j][6] = l_left;
buf.u32[j][7] = l_down;
buf.u32[j][8] = l_up;
}
for (int j = 0; j < 2; j++)
{
switch (retro_devices[j])
{
case RETRO_DEVICE_ANALOG:
game->SetInput(j, "dualanalog", &buf.u8[j]);
break;
default:
game->SetInput(j, "gamepad", &buf.u8[j]);
break;
}
}
#elif defined(WANT_PCE_FAST_EMU)
static uint8_t input_buf[5][2];
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_SELECT,
RETRO_DEVICE_ID_JOYPAD_START,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_Y,
RETRO_DEVICE_ID_JOYPAD_X,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_L2
};
if (input_state_cb)
{
for (unsigned j = 0; j < 5; j++)
{
uint16_t input_state = 0;
for (unsigned i = 0; i < 13; i++)
input_state |= input_state_cb(j, RETRO_DEVICE_JOYPAD, 0, map[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;
}
}
// Possible endian bug ...
for (unsigned i = 0; i < 5; i++)
game->SetInput(i, "gamepad", &input_buf[i][0]);
#elif defined(WANT_WSWAN_EMU)
static uint16_t input_buf;
input_buf = 0;
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_UP, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_RIGHT, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_DOWN, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_LEFT, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_R2, //Y Cursor UP vertical-layout games
RETRO_DEVICE_ID_JOYPAD_R, //Y Cursor RIGHT vertical-layout games
RETRO_DEVICE_ID_JOYPAD_L2, //Y Cursor DOWN vertical-layout games
RETRO_DEVICE_ID_JOYPAD_L, //Y Cursor LEFT vertical-layout games
RETRO_DEVICE_ID_JOYPAD_START,
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
};
for (unsigned i = 0; i < 11; i++)
input_buf |= map[i] != -1u &&
input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
#ifdef MSB_FIRST
union {
uint8_t b[2];
uint16_t s;
} u;
u.s = input_buf;
input_buf = u.b[0] | u.b[1] << 8;
#endif
game->SetInput(0, "gamepad", &input_buf);
#elif defined(WANT_NGP_EMU)
static uint16_t input_buf;
input_buf = 0;
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_UP, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_DOWN, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_LEFT, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_RIGHT, //X Cursor horizontal-layout games
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_START,
};
for (unsigned i = 0; i < 8; i++)
input_buf |= map[i] != -1u &&
input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
#ifdef MSB_FIRST
union {
uint8_t b[2];
uint16_t s;
} u;
u.s = input_buf;
input_buf = u.b[0] | u.b[1] << 8;
#endif
game->SetInput(0, "gamepad", &input_buf);
#elif defined(WANT_GBA_EMU)
static uint16_t input_buf;
input_buf = 0;
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_A, //A button
RETRO_DEVICE_ID_JOYPAD_B, //B button
RETRO_DEVICE_ID_JOYPAD_SELECT,
RETRO_DEVICE_ID_JOYPAD_START,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_L,
};
for (unsigned i = 0; i < 11; i++)
input_buf |= map[i] != -1u &&
input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
#ifdef MSB_FIRST
union {
uint8_t b[2];
uint16_t s;
} u;
u.s = input_buf;
input_buf = u.b[0] | u.b[1] << 8;
#endif
// Possible endian bug ...
game->SetInput(0, "gamepad", &input_buf);
#elif defined(WANT_SNES_EMU)
static uint8_t input_buf[5][2];
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_Y,
RETRO_DEVICE_ID_JOYPAD_SELECT,
RETRO_DEVICE_ID_JOYPAD_START,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_X,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
};
if (input_state_cb)
{
for (unsigned j = 0; j < 5; j++)
{
uint16_t input_state = 0;
for (unsigned i = 0; i < 13; i++)
input_state |= input_state_cb(j, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
#ifdef MSB_FIRST
union {
uint8_t b[2];
uint16_t s;
} u;
u.s = input_buf[j];
input_buf[j] = u.b[0] | u.b[1] << 8;
#else
input_buf[j][0] = (input_state >> 0) & 0xff;
input_buf[j][1] = (input_state >> 8) & 0xff;
#endif
}
}
// Possible endian bug ...
for (unsigned i = 0; i < 5; i++)
game->SetInput(i, "gamepad", &input_buf[i][0]);
#elif defined(WANT_VB_EMU)
static uint16_t input_buf[1];
input_buf[0] = 0;
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_L2, //right d-pad UP
RETRO_DEVICE_ID_JOYPAD_R3, //right d-pad RIGHT
RETRO_DEVICE_ID_JOYPAD_RIGHT, //left d-pad
RETRO_DEVICE_ID_JOYPAD_LEFT, //left d-pad
RETRO_DEVICE_ID_JOYPAD_DOWN, //left d-pad
RETRO_DEVICE_ID_JOYPAD_UP, //left d-pad
RETRO_DEVICE_ID_JOYPAD_START,
RETRO_DEVICE_ID_JOYPAD_SELECT,
RETRO_DEVICE_ID_JOYPAD_R2, //right d-pad LEFT
RETRO_DEVICE_ID_JOYPAD_L3, //right d-pad DOWN
};
for (unsigned j = 0; j < 1; j++)
{
for (unsigned i = 0; i < 14; i++)
input_buf[j] |= map[i] != -1u &&
input_state_cb(j, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
#ifdef MSB_FIRST
union {
uint8_t b[2];
uint16_t s;
} u;
u.s = input_buf[j];
input_buf[j] = u.b[0] | u.b[1] << 8;
#endif
}
// Possible endian bug ...
game->SetInput(0, "gamepad", &input_buf[0]);
#elif defined(WANT_PCFX_EMU)
static uint16_t input_buf[2];
input_buf[0] = input_buf[1] = 0;
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_X,
RETRO_DEVICE_ID_JOYPAD_Y,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_SELECT,
RETRO_DEVICE_ID_JOYPAD_START,
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_LEFT,
};
for (unsigned j = 0; j < 2; j++)
{
for (unsigned i = 0; i < 12; i++)
input_buf[j] |= map[i] != -1u &&
input_state_cb(j, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
#ifdef MSB_FIRST
union {
uint8_t b[2];
uint16_t s;
} u;
u.s = input_buf[j];
input_buf[j] = u.b[0] | u.b[1] << 8;
#endif
game->SetInput(j, "gamepad", &input_buf[j]);
}
#else
static uint16_t input_buf[1];
input_buf[0] = 0;
static unsigned map[] = {
RETRO_DEVICE_ID_JOYPAD_UP,
RETRO_DEVICE_ID_JOYPAD_DOWN,
RETRO_DEVICE_ID_JOYPAD_LEFT,
RETRO_DEVICE_ID_JOYPAD_RIGHT,
RETRO_DEVICE_ID_JOYPAD_A, //A button
RETRO_DEVICE_ID_JOYPAD_B, //B button
RETRO_DEVICE_ID_JOYPAD_START, //Option button
};
for (unsigned j = 0; j < 1; j++)
{
for (unsigned i = 0; i < 7; i++)
input_buf[j] |= map[i] != -1u &&
input_state_cb(j, RETRO_DEVICE_JOYPAD, 0, map[i]) ? (1 << i) : 0;
}
// Possible endian bug ...
game->SetInput(0, "gamepad", &input_buf[0]);
#endif
}
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_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;
}
MDFNGameInfo->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 * MDFNGameInfo->soundchan;
int32 SoundBufSize = spec.SoundBufSize - spec.SoundBufSizeALMS;
const int32 SoundBufMaxSize = spec.SoundBufMaxSize - spec.SoundBufSizeALMS;
spec.SoundBufSize = spec.SoundBufSizeALMS + SoundBufSize;
#if defined(WANT_PSX_EMU)
unsigned width = rects[0].w;
unsigned height = spec.DisplayRect.h;
unsigned int ptrDiff = 0;
#else
unsigned width = spec.DisplayRect.w;
unsigned height = spec.DisplayRect.h;
#endif
#if defined(WANT_PSX_EMU)
// This is for PAL, the core implements PAL over NTSC TV so you get the
// infamous PAL borders. This removes them. The PS1 supports only two horizontal
// resolutions so it's OK to use constants and not percentage.
bool isPal = false;
if (height == FB_HEIGHT)
{
ptrDiff += width * 47;
height = 480;
isPal = true;
}
else if (height == 288)
{
// TODO: This seems to be OK as is, but I might be wrong.
isPal = true;
}
if (isPal && width == FB_WIDTH)
ptrDiff += 7;
// The core handles vertical overscan for NTSC pretty well, but it ignores
// horizontal overscan. This is a tough estimation of what the horizontal
// overscan should be, tested with all major NTSC resolutions. Mayeb make it
// configurable?
float hoverscan = 0.941176471;
width = width * hoverscan;
ptrDiff += ((rects[0].w - width) / 2);
const uint32_t *ptr = surf->pixels;
ptr += ptrDiff;
video_cb(ptr, width, height, FB_WIDTH << 2);
#elif 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);
}
void retro_get_system_info(struct retro_system_info *info)
{
memset(info, 0, sizeof(*info));
info->library_name = MEDNAFEN_CORE_NAME;
info->library_version = MEDNAFEN_CORE_VERSION;
info->need_fullpath = true;
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; // Determined from empirical testing.
info->timing.sample_rate = 44100;
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;
fprintf(stderr, "[%s]: Samples / Frame: %.5f\n",
mednafen_core_str, (double)audio_frames / video_frames);
fprintf(stderr, "[%s]: Estimated FPS: %.5f\n",
mednafen_core_str, (double)video_frames * 44100 / audio_frames);
}
unsigned retro_get_region(void)
{
return RETRO_REGION_NTSC;
}
unsigned retro_api_version(void)
{
return RETRO_API_VERSION;
}
void retro_set_controller_port_device(unsigned in_port, unsigned device)
{
#ifdef WANT_PSX_EMU
if (in_port > 1)
{
fprintf(stderr,
"[%s]: Only the 2 main ports are supported at the moment", mednafen_core_str);
return;
}
switch (device)
{
// TODO: Add support for other input types
case RETRO_DEVICE_JOYPAD:
case RETRO_DEVICE_ANALOG:
fprintf(stderr, "[%s]: Selected controller type %u", mednafen_core_str, device);
retro_devices[in_port] = device;
break;
default:
retro_devices[in_port] = RETRO_DEVICE_JOYPAD;
fprintf(stderr,
"[%s]: Unsupported controller device, falling back to gamepad", mednafen_core_str);
}
#endif
}
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)
{
//if (serialize_size)
// return serialize_size;
if (!game->StateAction)
{
fprintf(stderr, "[mednafen]: Module %s doesn't support save states.\n", game->shortname);
return 0;
}
StateMem st;
memset(&st, 0, sizeof(st));
if (!MDFNSS_SaveSM(&st, 0, 0, NULL, NULL, NULL))
{
fprintf(stderr, "[mednafen]: Module %s doesn't support save states.\n", game->shortname);
return 0;
}
free(st.data);
return serialize_size = st.len;
}
bool retro_serialize(void *data, size_t size)
{
StateMem st;
memset(&st, 0, sizeof(st));
st.data = (uint8_t*)data;
st.malloced = size;
return MDFNSS_SaveSM(&st, 0, 0, NULL, NULL, NULL);
}
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)
{
return NULL;
}
size_t retro_get_memory_size(unsigned)
{
return 0;
}
void retro_cheat_reset(void)
{}
void retro_cheat_set(unsigned, bool, const char *)
{}
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