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libretro.c
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#include <sys/types.h>
#include <libretro.h>
#include <retro_math.h>
#include "libretro_core_options.h"
#include "mednafen/settings.h"
#include "mednafen/git.h"
#include "mednafen/wswan/wswan.h"
#include "mednafen/mempatcher.h"
#include "mednafen/wswan/gfx.h"
#include "mednafen/wswan/interrupt.h"
#include "mednafen/wswan/wswan-memory.h"
#include "mednafen/wswan/start.inc"
#include "mednafen/wswan/sound.h"
#include "mednafen/wswan/v30mz.h"
#include "mednafen/wswan/rtc.h"
#include "mednafen/wswan/eeprom.h"
#if defined(_3DS)
void* linearMemAlign(size_t size, size_t alignment);
void linearFree(void* mem);
#endif
#define MEDNAFEN_CORE_NAME_MODULE "wswan"
#define MEDNAFEN_CORE_NAME "Beetle WonderSwan"
#define MEDNAFEN_CORE_VERSION "v0.9.35.1"
#define MEDNAFEN_CORE_EXTENSIONS "ws|wsc|pc2"
#define MEDNAFEN_CORE_TIMING_FPS (3072000.0 / (159.0 * 256.0))
#define MEDNAFEN_CORE_GEOMETRY_BASE_W 224
#define MEDNAFEN_CORE_GEOMETRY_BASE_H 144
#define MEDNAFEN_CORE_GEOMETRY_MAX_W 224
#define MEDNAFEN_CORE_GEOMETRY_MAX_H 144
#define MEDNAFEN_CORE_GEOMETRY_ASPECT_RATIO (14.0 / 9.0)
#define FB_WIDTH 224
#define FB_HEIGHT 144
#define FB_MAX_HEIGHT FB_HEIGHT
/* Forward declarations */
void MDFN_LoadGameCheats(void *override_ptr);
void MDFN_FlushGameCheats(int nosave);
/* core options */
static int RETRO_SAMPLE_RATE = 44100;
static int RETRO_PIX_BYTES = 2;
static int RETRO_PIX_DEPTH = 15;
struct retro_perf_callback perf_cb;
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 libretro_supports_bitmasks = false;
typedef enum
{
DISPLAY_ROTATION_MANUAL = 0,
DISPLAY_ROTATION_PORTRAIT,
DISPLAY_ROTATION_LANDSCAPE
} retro_display_rotation_t;
static retro_display_rotation_t retro_display_rotation = DISPLAY_ROTATION_MANUAL;
static bool rotate_tall = false;
static bool select_pressed_last_frame = false;
static bool hw_rotate_enabled = false;
static unsigned rotate_joymap = 0;
static MDFN_Surface *surf = NULL;
static uint16_t *rotate_buf = NULL;
#define ROTATE_PIXEL_BUF(typename_t, src, width, height, dst) \
{ \
typename_t *in_ptr = (typename_t*)src; \
typename_t *out_ptr = (typename_t*)dst; \
size_t x, y; \
for (x = 0; x < width; x++) \
for (y = 0; y < height; y++) \
*(out_ptr + y + (((width - 1) - x) * height)) = *(in_ptr + x + (y * width)); \
}
static int16_t *audio_samples_buf = NULL;
static int32_t audio_samples_buf_size = 0;
#define RETRO_60HZ_FPS ((4.0 * MEDNAFEN_CORE_TIMING_FPS) / 5.0)
#define RETRO_60HZ_CYCLE_INDEX 4
typedef struct
{
int16_t *samples_buf;
int32_t samples_buf_size;
int32_t samples_buf_pos;
int32_t samples_per_frame;
} retro_60hz_audio_t;
static bool retro_60hz_enabled = false;
static uint16_t retro_60hz_counter = 0;
static retro_60hz_audio_t retro_60hz_audio = {0};
static void retro_60hz_deinit(void)
{
if (retro_60hz_audio.samples_buf)
free(retro_60hz_audio.samples_buf);
retro_60hz_audio.samples_buf = NULL;
retro_60hz_audio.samples_buf_size = 0;
retro_60hz_audio.samples_buf_pos = 0;
retro_60hz_audio.samples_per_frame = 0;
retro_60hz_counter = 0;
}
static void retro_60hz_init(void)
{
retro_60hz_deinit();
if (retro_60hz_enabled)
{
/* Get expected number of samples per 60Hz
* frame
* > Round down - any excess samples will be read
* out at the end of each 4/5 frame cycle */
retro_60hz_audio.samples_per_frame = ((int32_t)(RETRO_SAMPLE_RATE /
RETRO_60HZ_FPS));
/* Initial buffer size should be *twice* that of
* the expected number of samples per 75Hz frame */
retro_60hz_audio.samples_buf_size = ((int32_t)(RETRO_SAMPLE_RATE /
MEDNAFEN_CORE_TIMING_FPS) + 1) << 2;
retro_60hz_audio.samples_buf = (int16_t*)malloc(
retro_60hz_audio.samples_buf_size * sizeof(int16_t));
if (!retro_60hz_audio.samples_buf)
{
retro_60hz_deinit();
retro_60hz_enabled = false;
}
}
}
static void retro_60hz_cache_audio_samples(int16_t *samples, int32_t frames)
{
int32_t buffer_capacity = retro_60hz_audio.samples_buf_size -
retro_60hz_audio.samples_buf_pos;
int32_t samples_to_write = frames << 1;
/* Resize buffer if necessary */
if (buffer_capacity < samples_to_write)
{
int16_t *tmp_buffer = NULL;
int32_t tmp_buffer_size;
tmp_buffer_size = retro_60hz_audio.samples_buf_size +
(samples_to_write - buffer_capacity);
tmp_buffer_size = (tmp_buffer_size << 1) - (tmp_buffer_size >> 1);
tmp_buffer = (int16_t *)malloc(tmp_buffer_size * sizeof(int16_t));
memcpy(tmp_buffer, retro_60hz_audio.samples_buf,
retro_60hz_audio.samples_buf_pos * sizeof(int16_t));
free(retro_60hz_audio.samples_buf);
retro_60hz_audio.samples_buf = tmp_buffer;
retro_60hz_audio.samples_buf_size = tmp_buffer_size;
}
/* Copy samples */
memcpy(retro_60hz_audio.samples_buf +
retro_60hz_audio.samples_buf_pos,
samples, samples_to_write * sizeof(int16_t));
retro_60hz_audio.samples_buf_pos += samples_to_write;
}
static bool audio_low_pass_enabled = false;
static int64_t audio_low_pass_acc_left = 0;
static int64_t audio_low_pass_acc_right = 0;
static void audio_low_pass_apply(int16_t *samples, int32_t frames)
{
while (frames-- > 0)
{
int64_t drop_current_left;
int64_t drop_current_right;
/* Left channel */
drop_current_left = ((*samples << 16) - audio_low_pass_acc_left) >> 3;
audio_low_pass_acc_left += drop_current_left;
*samples++ = (int16_t)((audio_low_pass_acc_left >> 16) & 0xFFFF);
/* Right channel */
drop_current_right = ((*samples << 16) - audio_low_pass_acc_right) >> 3;
audio_low_pass_acc_right += drop_current_right;
*samples++ = (int16_t)((audio_low_pass_acc_right >> 16) & 0xFFFF);
}
}
/* Mono palettes */
struct ws_mono_palette
{
const char *name;
uint32 start;
uint32 end;
};
static struct ws_mono_palette ws_mono_palettes[] = {
{ "default", 0x000000, 0xFFFFFF },
{ "wonderswan", 0x3E3D20, 0x9B9D66 },
{ "wondeswan_color", 0x1B201E, 0xD7D49D },
{ "swancrystal", 0x151108, 0xFFFCCA },
{ "gb_dmg", 0x00420C, 0x578200 },
{ "gb_pocket", 0x2A3325, 0xA7B19A },
{ "gb_light", 0x00778D, 0x01CBDF },
{ "blossom_pink", 0x180F0F, 0xF09898 },
{ "bubbles_blue", 0x0D1418, 0x88D0F0 },
{ "buttercup_green", 0x12160D, 0xB8E088 },
{ "digivice", 0x000000, 0x8C8C73 },
{ "game_com", 0x000000, 0xA7BF6B },
{ "gameking", 0x184221, 0x8CCE94 },
{ "game_master", 0x2D2D2B, 0x829FA6 },
{ "golden_wild", 0x120F0A, 0xB99F65 },
{ "greenscale", 0x0C360C, 0x9CBE0C },
{ "hokage_orange", 0x170D08, 0xEA8352 },
{ "labo_fawn", 0x15110B, 0xD7AA73 },
{ "legendary_super_saiyan", 0x101509, 0xA5DB5A },
{ "microvision", 0x303030, 0xA0A0A0 },
{ "million_live_gold", 0x141109, 0xCDB261 },
{ "odyssey_gold", 0x131000, 0xC2A000 },
{ "shiny_sky_blue", 0x0E1216, 0x8CB6DF },
{ "slime_blue", 0x040E14, 0x2F8CCC },
{ "ti_83", 0x181810, 0x9CA684 },
{ "travel_wood", 0x482810, 0xF8D8B0 },
{ "virtual_boy", 0x000000, 0xE30000 },
{ NULL, 0, 0 },
};
static uint32 mono_pal_start = 0x000000;
static uint32 mono_pal_end = 0xFFFFFF;
static bool find_mono_palette(const char* name,
uint32 *start, uint32 *end)
{
bool palette_found = false;
unsigned i;
for (i = 0; ws_mono_palettes[i].name; i++)
{
if (!strcmp(ws_mono_palettes[i].name, name))
{
*start = ws_mono_palettes[i].start;
*end = ws_mono_palettes[i].end;
palette_found = true;
break;
}
}
if (!palette_found)
{
*start = 0x000000;
*end = 0xFFFFFF;
}
return palette_found;
}
/* Frameskipping */
static unsigned frameskip_type = 0;
static unsigned frameskip_threshold = 0;
static uint16_t frameskip_counter = 0;
static bool retro_audio_buff_active = false;
static unsigned retro_audio_buff_occupancy = 0;
static bool retro_audio_buff_underrun = false;
/* Maximum number of consecutive frames that
* can be skipped */
#define FRAMESKIP_MAX 30
static unsigned audio_latency = 0;
static bool update_audio_latency = false;
static void retro_audio_buff_status_cb(
bool active, unsigned occupancy, bool underrun_likely)
{
retro_audio_buff_active = active;
retro_audio_buff_occupancy = occupancy;
retro_audio_buff_underrun = underrun_likely;
}
static void init_frameskip(void)
{
if (frameskip_type > 0)
{
struct retro_audio_buffer_status_callback buf_status_cb;
buf_status_cb.callback = retro_audio_buff_status_cb;
if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK,
&buf_status_cb))
{
if (log_cb)
log_cb(RETRO_LOG_WARN, "Frameskip disabled - frontend does not support audio buffer status monitoring.\n");
retro_audio_buff_active = false;
retro_audio_buff_occupancy = 0;
retro_audio_buff_underrun = false;
audio_latency = 0;
}
else
{
float fps;
float latency_factor;
float frame_time_msec;
if (retro_60hz_enabled)
{
fps = (float)RETRO_60HZ_FPS;
latency_factor = 6.0f;
}
else
{
fps = (float)MEDNAFEN_CORE_TIMING_FPS;
latency_factor = 8.0f;
}
/* Frameskip is enabled - increase frontend
* audio latency to minimise potential
* buffer underruns */
frame_time_msec = 1000.0f / fps;
/* Set latency to an integer multiple of
* the current frame time...
* > At 60Hz we normally use a 6x multiplier
* > The native (unusually high) 75Hz of the
* WonderSwan seems to place greater demands
* on the frontend, so we increase the
* multiplier to 8x; this gives the frontend
* more room to manoeuvre, and improves the
* efficacy of the 'Auto' frameskip setting */
audio_latency = (unsigned)((latency_factor * frame_time_msec) + 0.5f);
/* ...then round up to nearest multiple of 32 */
audio_latency = (audio_latency + 0x1F) & ~0x1F;
}
}
else
{
environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL);
audio_latency = 0;
}
update_audio_latency = true;
}
/* Cygne
*
* Copyright notice for this file:
* Copyright (C) 2002 Dox [email protected]
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
int wsc = 1; /*color/mono*/
uint32 rom_size;
uint16 WSButtonStatus;
static void Reset(void)
{
int u0;
v30mz_reset(); /* Reset CPU */
WSwan_MemoryReset();
WSwan_GfxReset();
WSwan_SoundReset();
WSwan_InterruptReset();
WSwan_RTCReset();
WSwan_EEPROMReset();
for(u0=0;u0<0xc9;u0++)
{
if(u0 != 0xC4 && u0 != 0xC5 && u0 != 0xBA && u0 != 0xBB)
WSwan_writeport(u0,startio[u0]);
}
v30mz_set_reg(NEC_SS,0);
v30mz_set_reg(NEC_SP,0x2000);
}
static uint8 *chee = NULL;
static void Emulate(EmulateSpecStruct *espec,
int skip_frame, int update_sample_rate)
{
espec->surface = surf;
espec->DisplayRect.w = 224;
espec->DisplayRect.h = 144;
espec->skip = skip_frame;
espec->SoundBufSize = 0;
if (update_sample_rate)
WSwan_SetSoundRate(RETRO_SAMPLE_RATE);
WSButtonStatus = chee[0] | (chee[1] << 8);
MDFNMP_ApplyPeriodicCheats();
while (!wsExecuteLine(espec->surface, espec->skip));
espec->SoundBufSize = WSwan_SoundFlush(&audio_samples_buf,
&audio_samples_buf_size);
if (audio_low_pass_enabled)
audio_low_pass_apply(audio_samples_buf,
espec->SoundBufSize);
v30mz_timestamp = 0;
}
#if 0
typedef struct
{
const uint8 id;
const char *name;
} DLEntry;
static const DLEntry Developers[] =
{
{ 0x01, "Bandai" },
{ 0x02, "Taito" },
{ 0x03, "Tomy" },
{ 0x04, "Koei" },
{ 0x05, "Data East" },
{ 0x06, "Asmik" }, /* Asmik Ace? */
{ 0x07, "Media Entertainment" },
{ 0x08, "Nichibutsu" },
{ 0x0A, "Coconuts Japan" },
{ 0x0B, "Sammy" },
{ 0x0C, "Sunsoft" },
{ 0x0D, "Mebius" },
{ 0x0E, "Banpresto" },
{ 0x10, "Jaleco" },
{ 0x11, "Imagineer" },
{ 0x12, "Konami" },
{ 0x16, "Kobunsha" },
{ 0x17, "Bottom Up" },
{ 0x18, "Kaga Tech" },
{ 0x19, "Sunrise" },
{ 0x1A, "Cyber Front" },
{ 0x1B, "Mega House" },
{ 0x1D, "Interbec" },
{ 0x1E, "Nihon Application" },
{ 0x1F, "Bandai Visual" },
{ 0x20, "Athena" },
{ 0x21, "KID" },
{ 0x22, "HAL Corporation" },
{ 0x23, "Yuki Enterprise" },
{ 0x24, "Omega Micott" },
{ 0x25, "Layup" },
{ 0x26, "Kadokawa Shoten" },
{ 0x27, "Shall Luck" },
{ 0x28, "Squaresoft" },
{ 0x2B, "Tom Create" },
{ 0x2D, "Namco" },
{ 0x2E, "Movic" }, /* ???? */
{ 0x2F, "E3 Staff" }, /* ???? */
{ 0x31, "Vanguard" },
{ 0x32, "Megatron" },
{ 0x33, "Wiz" },
{ 0x36, "Capcom" }
};
#endif
static uint32 SRAMSize;
static int Load(const uint8_t *data, size_t size)
{
uint32 pow_size = 0;
uint32 real_rom_size = 0;
uint8 header[10];
if(size < 65536)
return 0;
real_rom_size = (size + 0xFFFF) & ~0xFFFF;
pow_size = next_pow2(real_rom_size);
rom_size = pow_size + (pow_size == 0);
wsCartROM = (uint8 *)calloc(1, rom_size);
/* This real_rom_size vs rom_size funny business
* is intended primarily for handling
* WSR files. */
if(real_rom_size < rom_size)
memset(wsCartROM, 0xFF, rom_size - real_rom_size);
memcpy(wsCartROM + (rom_size - real_rom_size), data, size);
memcpy(header, wsCartROM + rom_size - 10, 10);
SRAMSize = 0;
eeprom_size = 0;
switch(header[5])
{
case 0x01: SRAMSize = 8 * 1024; break;
case 0x02: SRAMSize = 32 * 1024; break;
case 0x03: SRAMSize = 128 * 1024; break;
case 0x04: SRAMSize = 256 * 1024; break; /* Dicing Knight!, Judgement Silver */
case 0x05: SRAMSize = 512 * 1024; break; /* Wonder Gate */
case 0x10: eeprom_size = 128; break;
case 0x20: eeprom_size = 2 *1024; break;
case 0x50: eeprom_size = 1024; break;
}
if((header[8] | (header[9] << 8)) == 0x8de1 && (header[0]==0x01)&&(header[2]==0x27)) /* Detective Conan */
{
/* WS cpu is using cache/pipeline or there's protected ROM bank where pointing CS */
wsCartROM[0xfffe8]=0xea;
wsCartROM[0xfffe9]=0x00;
wsCartROM[0xfffea]=0x00;
wsCartROM[0xfffeb]=0x00;
wsCartROM[0xfffec]=0x20;
}
#if 0
if(header[6] & 0x1)
EmulatedWSwan.rotated = MDFN_ROTATE90;
#endif
MDFNMP_Init(16384, (1 << 20) / 1024);
v30mz_init(WSwan_readmem20, WSwan_writemem20, WSwan_readport, WSwan_writeport);
WSwan_MemoryInit(MDFN_GetSettingB("wswan.language"), wsc, SRAMSize, false); /* EEPROM and SRAM are loaded in this func. */
WSwan_GfxInit();
WSwan_SoundInit();
wsMakeTiles();
Reset();
return 1;
}
static void CloseGame(void)
{
WSwan_MemoryKill();
WSwan_SoundKill();
if(wsCartROM)
{
free(wsCartROM);
wsCartROM = NULL;
}
}
int StateAction(StateMem *sm, int load, int data_only)
{
if(!v30mz_StateAction(sm, load, data_only))
return 0;
/* Call MemoryStateAction before others StateActions... */
if(!WSwan_MemoryStateAction(sm, load, data_only))
return 0;
if(!WSwan_GfxStateAction(sm, load, data_only))
return 0;
if(!WSwan_RTCStateAction(sm, load, data_only))
return 0;
if(!WSwan_InterruptStateAction(sm, load, data_only))
return 0;
if(!WSwan_SoundStateAction(sm, load, data_only))
return 0;
if(!WSwan_EEPROMStateAction(sm, load, data_only))
return 0;
return 1;
}
static void DoSimpleCommand(int cmd)
{
switch(cmd)
{
case MDFN_MSC_POWER:
case MDFN_MSC_RESET:
Reset();
break;
}
}
static bool update_audio = false;
static bool update_video = false;
static bool MDFNI_LoadGame(
const char *force_module, const uint8_t *data,
size_t size)
{
if(Load(data, size) <= 0)
return false;
MDFN_LoadGameCheats(NULL);
MDFNMP_InstallReadPatches();
return true;
}
static void MDFNI_CloseGame(void)
{
MDFN_FlushGameCheats(0);
CloseGame();
MDFNMP_Kill();
}
static void check_system_specs(void)
{
/* TODO - should theoretically be level 4, but apparently
* doesn't run at fullspeed on PSP (yet) */
unsigned level = 4;
environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
}
static void check_depth(void)
{
if (RETRO_PIX_DEPTH == 24)
{
enum retro_pixel_format rgb888 = RETRO_PIXEL_FORMAT_XRGB8888;
if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &rgb888))
{
if (log_cb) log_cb(RETRO_LOG_ERROR, "Pixel format XRGB8888 not supported by platform.\n");
RETRO_PIX_BYTES = 2;
RETRO_PIX_DEPTH = 15;
}
}
#if defined(FRONTEND_SUPPORTS_RGB565)
if (RETRO_PIX_BYTES == 2)
{
enum retro_pixel_format rgb565 = RETRO_PIXEL_FORMAT_RGB565;
if (environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &rgb565))
{
if (log_cb) log_cb(RETRO_LOG_INFO, "Frontend supports RGB565 - will use that instead of XRGB1555.\n");
RETRO_PIX_DEPTH = 16;
}
}
#endif
}
static void rotate_display(void)
{
if (hw_rotate_enabled)
{
struct retro_game_geometry new_geom = {
FB_WIDTH,
FB_HEIGHT,
FB_WIDTH,
FB_HEIGHT,
rotate_tall ? (9.0 / 14.0) : (14.0 / 9.0)
};
unsigned rot_angle = rotate_tall ?
1 : /* 90 degrees */
0; /* 0 degrees */
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, (void*)&new_geom);
environ_cb(RETRO_ENVIRONMENT_SET_ROTATION, (void*)&rot_angle);
}
else
{
struct retro_game_geometry new_geom = {
rotate_tall ? FB_HEIGHT : FB_WIDTH,
rotate_tall ? FB_WIDTH : FB_HEIGHT,
FB_WIDTH,
FB_WIDTH,
rotate_tall ? (9.0 / 14.0) : (14.0 / 9.0)
};
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, (void*)&new_geom);
}
}
static void check_variables(int startup)
{
struct retro_variable var = {0};
uint32 prev_mono_pal_start;
uint32 prev_mono_pal_end;
unsigned prev_frameskip_type;
bool update_60hz_mode = false;
var.key = "wswan_rotate_display",
var.value = NULL;
retro_display_rotation = DISPLAY_ROTATION_MANUAL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (!strcmp(var.value, "portrait"))
retro_display_rotation = DISPLAY_ROTATION_PORTRAIT;
else if (!strcmp(var.value, "landscape"))
retro_display_rotation = DISPLAY_ROTATION_LANDSCAPE;
}
switch (retro_display_rotation)
{
case DISPLAY_ROTATION_PORTRAIT:
if (!rotate_tall)
{
rotate_tall = true;
rotate_display();
}
break;
case DISPLAY_ROTATION_LANDSCAPE:
if (rotate_tall)
{
rotate_tall = false;
rotate_display();
}
break;
default:
break;
}
var.key = "wswan_rotate_keymap",
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (!strcmp(var.value, "disabled"))
rotate_joymap = 0;
else if (!strcmp(var.value, "enabled"))
rotate_joymap = 1;
else if (!strcmp(var.value, "auto"))
rotate_joymap = 2;
}
var.key = "wswan_mono_palette",
var.value = NULL;
prev_mono_pal_start = mono_pal_start;
prev_mono_pal_end = mono_pal_end;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
find_mono_palette(var.value, &mono_pal_start, &mono_pal_end);
if ((mono_pal_start != prev_mono_pal_start) ||
(mono_pal_end != prev_mono_pal_end))
WSwan_SetMonoPalette(RETRO_PIX_DEPTH, mono_pal_start, mono_pal_end);
var.key = "wswan_frameskip";
var.value = NULL;
prev_frameskip_type = frameskip_type;
frameskip_type = 0;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "auto") == 0)
frameskip_type = 1;
else if (strcmp(var.value, "manual") == 0)
frameskip_type = 2;
}
var.key = "wswan_frameskip_threshold";
var.value = NULL;
frameskip_threshold = 33;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
frameskip_threshold = strtol(var.value, NULL, 10);
var.key = "wswan_60hz_mode";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
bool old_value = retro_60hz_enabled;
if (!strcmp(var.value, "disabled"))
retro_60hz_enabled = false;
else if (!strcmp(var.value, "enabled"))
retro_60hz_enabled = true;
if (!startup && (old_value != retro_60hz_enabled))
{
update_video = true;
update_60hz_mode = true;
}
}
var.key = "wswan_sound_sample_rate";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
int old_value = RETRO_SAMPLE_RATE;
RETRO_SAMPLE_RATE = atoi(var.value);
RETRO_SAMPLE_RATE = (RETRO_SAMPLE_RATE < 11025) ?
11025 : RETRO_SAMPLE_RATE;
RETRO_SAMPLE_RATE = (RETRO_SAMPLE_RATE > 48000) ?
48000 : RETRO_SAMPLE_RATE;
if (!startup && (old_value != RETRO_SAMPLE_RATE))
{
update_audio = true;
/* If audio sample rate changes, must reinitialise
* 60Hz mode (will be a no-op if 60Hz mode is
* currently inactive) */
update_60hz_mode = true;
}
}
var.key = "wswan_sound_low_pass";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (!strcmp(var.value, "disabled"))
audio_low_pass_enabled = false;
else if (!strcmp(var.value, "enabled"))
audio_low_pass_enabled = true;
}
if (startup)
{
var.key = "wswan_gfx_colors";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (!strcmp(var.value, "16bit"))
{
RETRO_PIX_BYTES = 2;
RETRO_PIX_DEPTH = 16;
}
else if (!strcmp(var.value, "24bit"))
{
RETRO_PIX_BYTES = 4;
RETRO_PIX_DEPTH = 24;
}
}
}
if (update_60hz_mode)
retro_60hz_init();
/* (Re)Initialise frameskipping, if required */
if (startup ||
(frameskip_type != prev_frameskip_type) ||
update_60hz_mode)
init_frameskip();
}
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;
frameskip_type = 0;
frameskip_threshold = 0;
frameskip_counter = 0;
retro_audio_buff_active = false;
retro_audio_buff_occupancy = 0;
retro_audio_buff_underrun = false;
audio_latency = 0;
update_audio_latency = false;
audio_low_pass_enabled = false;
audio_low_pass_acc_left = 0;
audio_low_pass_acc_right = 0;
check_system_specs();
check_variables(true);
check_depth();
if (environ_cb(RETRO_ENVIRONMENT_GET_INPUT_BITMASKS, NULL))
libretro_supports_bitmasks = true;
}
void retro_reset(void)
{
DoSimpleCommand(MDFN_MSC_RESET);
}
bool retro_load_game_special(unsigned a, const struct retro_game_info *b, size_t c)
{
return false;
}
#define MAX_PLAYERS 1
#define MAX_BUTTONS 11
static uint16_t input_buf;
bool retro_load_game(const struct retro_game_info *info)
{
const unsigned rot_angle = 0;
struct retro_input_descriptor desc[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "X Cursor Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "X Cursor Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "X Cursor Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "X Cursor Right" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "Y Cursor Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R2, "Y Cursor Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2, "Y Cursor Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Y Cursor Right" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Rotate screen + active D-Pad" },
{ 0 },
};
if (!info)
goto error;
environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
if (!MDFNI_LoadGame(MEDNAFEN_CORE_NAME_MODULE,
(const uint8_t*)info->data, info->size))
goto error;
chee = (uint8 *)&input_buf;
surf = (MDFN_Surface*)calloc(1, sizeof(*surf));
if (!surf)
goto error;
surf->width = FB_WIDTH;
surf->height = FB_HEIGHT;
surf->pitch = FB_WIDTH;
surf->depth = RETRO_PIX_DEPTH;
#if defined(_3DS)
surf->pixels = (uint16_t*)linearMemAlign(FB_WIDTH * FB_HEIGHT * sizeof(uint32_t), 128);
#else
surf->pixels = (uint16_t*)calloc(1, FB_WIDTH * FB_HEIGHT * sizeof(uint32_t));
#endif
if (!surf->pixels)
goto error;
/* Check whether 'hardware' rotation (via frontend
* gfx driver) is supported */
hw_rotate_enabled = environ_cb(RETRO_ENVIRONMENT_SET_ROTATION, (void*)&rot_angle);
if (!hw_rotate_enabled && !rotate_buf)
{
#if defined(_3DS)
rotate_buf = (uint16_t*)linearMemAlign(FB_WIDTH * FB_HEIGHT * sizeof(uint32_t), 128);
#else
rotate_buf = (uint16_t*)calloc(1, FB_WIDTH * FB_HEIGHT * sizeof(uint32_t));
#endif
if (!rotate_buf)
goto error;
}
rotate_tall = false;
select_pressed_last_frame = false;
rotate_joymap = 0;
check_variables(false);
/* Allocate an audio buffer of sufficient size
* for the expected number of samples per frame
* (size will be increased automatically if
* configuration changes) */
audio_samples_buf_size = ((int32_t)(RETRO_SAMPLE_RATE /
MEDNAFEN_CORE_TIMING_FPS) + 1) << 1;
audio_samples_buf = (int16_t*)malloc(audio_samples_buf_size * sizeof(int16_t));
if (!audio_samples_buf)
goto error;
retro_60hz_init();