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Genesis-Plus-GX/source/unused/win/main.c
ekeeke31 ecb5f0617b updated SDL/Win32 sourcecode
2009-11-22 16:35:41 +00:00

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#include <windows.h>
#include "SDL.h"
#include "SDL_thread.h"
#include "shared.h"
#include "sms_ntsc.h"
#include "md_ntsc.h"
#define SOUND_FREQUENCY 48000
#define SOUND_SAMPLES_SIZE 2048
#define VIDEO_WIDTH 640
#define VIDEO_HEIGHT 480
int joynum = 0;
int log_error = 0;
int debug_on = 0;
int turbo_mode = 0;
int use_sound = 1;
int fullscreen = 0; /* SDL_FULLSCREEN */
/* sound */
struct {
char* current_pos;
char* buffer;
int current_emulated_samples;
} sdl_sound;
static void sdl_sound_callback(void *userdata, Uint8 *stream, int len)
{
if(sdl_sound.current_emulated_samples < len) {
memset(stream, 0, len);
}
else {
memcpy(stream, sdl_sound.buffer, len);
/* loop to compensate desync */
do {
sdl_sound.current_emulated_samples -= len;
} while(sdl_sound.current_emulated_samples > 2 * len);
memcpy(sdl_sound.buffer,
sdl_sound.current_pos - sdl_sound.current_emulated_samples,
sdl_sound.current_emulated_samples);
sdl_sound.current_pos = sdl_sound.buffer + sdl_sound.current_emulated_samples;
}
}
static int sdl_sound_init()
{
int n;
SDL_AudioSpec as_desired, as_obtained;
if(SDL_Init(SDL_INIT_AUDIO) < 0) {
MessageBox(NULL, "SDL Audio initialization failed", "Error", 0);
return 0;
}
as_desired.freq = SOUND_FREQUENCY;
as_desired.format = AUDIO_S16LSB;
as_desired.channels = 2;
as_desired.samples = SOUND_SAMPLES_SIZE;
as_desired.callback = sdl_sound_callback;
if(SDL_OpenAudio(&as_desired, &as_obtained) == -1) {
MessageBox(NULL, "SDL Audio open failed", "Error", 0);
return 0;
}
if(as_desired.samples != as_obtained.samples) {
MessageBox(NULL, "SDL Audio wrong setup", "Error", 0);
return 0;
}
sdl_sound.current_emulated_samples = 0;
n = SOUND_SAMPLES_SIZE * 2 * sizeof(short) * 11;
sdl_sound.buffer = (char*)malloc(n);
if(!sdl_sound.buffer) {
MessageBox(NULL, "Can't allocate audio buffer", "Error", 0);
return 0;
}
memset(sdl_sound.buffer, 0, n);
sdl_sound.current_pos = sdl_sound.buffer;
return 1;
}
static void sdl_sound_update()
{
int i;
short* p;
SDL_LockAudio();
p = (short*)sdl_sound.current_pos;
for(i = 0; i < snd.buffer_size; ++i) {
*p = snd.buffer[0][i];
++p;
*p = snd.buffer[1][i];
++p;
}
sdl_sound.current_pos = (char*)p;
sdl_sound.current_emulated_samples += snd.buffer_size * 2 * sizeof(short);
SDL_UnlockAudio();
}
static void sdl_sound_close()
{
SDL_PauseAudio(1);
SDL_CloseAudio();
if (sdl_sound.buffer)
free(sdl_sound.buffer);
}
/* video */
md_ntsc_t md_ntsc;
sms_ntsc_t sms_ntsc;
struct {
SDL_Surface* surf_screen;
SDL_Surface* surf_bitmap;
Uint32 frames_rendered;
} sdl_video;
static int sdl_video_init()
{
if(SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) {
MessageBox(NULL, "SDL Video initialization failed", "Error", 0);
return 0;
}
sdl_video.surf_screen = SDL_SetVideoMode(VIDEO_WIDTH, VIDEO_HEIGHT, 16, SDL_SWSURFACE | fullscreen);
sdl_video.surf_bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, 720, 576, 16, 0, 0, 0, 0);
sdl_video.frames_rendered = 0;
SDL_WM_SetCaption("Genesis Plus/SDL", NULL);
SDL_ShowCursor(0);
return 1;
}
static void sdl_video_update()
{
SDL_Rect rect;
system_frame(0);
/* viewport size changed */
if(bitmap.viewport.changed)
{
bitmap.viewport.changed = 0;
rect.w = bitmap.viewport.w+2*bitmap.viewport.x;
rect.h = bitmap.viewport.h+2*bitmap.viewport.y;
if (config.render && (interlaced || config.ntsc)) rect.h *= 2;
if (config.ntsc) rect.w = (reg[12]&1) ? MD_NTSC_OUT_WIDTH(rect.w) : SMS_NTSC_OUT_WIDTH(rect.w);
rect.x=(VIDEO_WIDTH-rect.w)/2;
rect.y=(VIDEO_HEIGHT-rect.h)/2;
/* init NTSC filter */
md_ntsc_setup_t md_setup;
sms_ntsc_setup_t sms_setup;
if (config.ntsc == 1)
{
sms_setup = sms_ntsc_composite;
md_setup = md_ntsc_composite;
sms_ntsc_init( &sms_ntsc, &sms_setup );
md_ntsc_init( &md_ntsc, &md_setup );
}
else if (config.ntsc == 2)
{
sms_setup = sms_ntsc_svideo;
md_setup = md_ntsc_svideo;
sms_ntsc_init( &sms_ntsc, &sms_setup );
md_ntsc_init( &md_ntsc, &md_setup );
}
else if (config.ntsc == 3)
{
sms_setup = sms_ntsc_rgb;
md_setup = md_ntsc_rgb;
sms_ntsc_init( &sms_ntsc, &sms_setup );
md_ntsc_init( &md_ntsc, &md_setup );
}
}
SDL_BlitSurface(sdl_video.surf_bitmap, NULL, sdl_video.surf_screen, &rect);
SDL_UpdateRect(sdl_video.surf_screen, 0, 0, 0, 0);
++sdl_video.frames_rendered;
}
static void sdl_video_close()
{
if (sdl_video.surf_bitmap) SDL_FreeSurface(sdl_video.surf_bitmap);
if (sdl_video.surf_screen) SDL_FreeSurface(sdl_video.surf_screen);
}
/* Timer Sync */
struct {
SDL_sem* sem_sync;
} sdl_sync;
/* sync */
static Uint32 sdl_sync_timer_callback(Uint32 interval)
{
/*char caption[100];
char region[10];
if (region_code == REGION_USA) sprintf(region,"USA");
else if (region_code == REGION_EUROPE) sprintf(region,"EUR");
else sprintf(region,"JAP");
sprintf(caption, "Genesis Plus/SDL - %s (%s) - %d fps - 0x%04X", rominfo.international, region, vdp_rate, realchecksum);
SDL_WM_SetCaption(caption, NULL);*/
SDL_SemPost(sdl_sync.sem_sync);
return interval;
}
static int sdl_sync_init()
{
if(SDL_InitSubSystem(SDL_INIT_TIMER|SDL_INIT_EVENTTHREAD) < 0) {
MessageBox(NULL, "SDL Timer initialization failed", "Error", 0);
return 0;
}
sdl_sync.sem_sync = SDL_CreateSemaphore(0);
return 1;
}
static void sdl_sync_close()
{
if(sdl_sync.sem_sync)
SDL_DestroySemaphore(sdl_sync.sem_sync);
}
static int sdl_control_update(SDLKey keystate)
{
switch (keystate)
{
case SDLK_TAB:
{
system_reset();
break;
}
case SDLK_F2:
{
if (fullscreen) fullscreen = 0;
else fullscreen = SDL_FULLSCREEN;
sdl_video.surf_screen = SDL_SetVideoMode(VIDEO_WIDTH, VIDEO_HEIGHT, 16, SDL_SWSURFACE | fullscreen);
break;
}
case SDLK_F3:
{
config.render ^=1;
break;
}
case SDLK_F4:
{
SDL_FillRect(sdl_video.surf_screen, 0, 0);
config.ntsc ++;
if (config.ntsc > 3) config.ntsc = 0;
bitmap.viewport.changed = 1;
break;
}
case SDLK_F5:
{
log_error ^= 1;
break;
}
case SDLK_F6:
{
turbo_mode ^=1;
break;
}
case SDLK_F7:
{
FILE *f = fopen("game.gpz","r+b");
if (f)
{
uint8 buf[STATE_SIZE];
fread(&buf, STATE_SIZE, 1, f);
state_load(buf);
fclose(f);
}
break;
}
case SDLK_F8:
{
FILE *f = fopen("game.gpz","w+b");
if (f)
{
uint8 buf[STATE_SIZE];
state_save(buf);
fwrite(&buf, STATE_SIZE, 1, f);
fclose(f);
}
break;
}
case SDLK_F9:
{
vdp_pal ^= 1;
/* reinitialize timings */
system_init ();
unsigned char *temp = malloc(YM2612GetContextSize());
if (temp) memcpy(temp, YM2612GetContextPtr(), YM2612GetContextSize());
audio_init(SOUND_FREQUENCY);
if (temp)
{
YM2612Restore(temp);
free(temp);
}
/* reinitialize HVC tables */
vctab = (vdp_pal) ? ((reg[1] & 8) ? vc_pal_240 : vc_pal_224) : vc_ntsc_224;
hctab = (reg[12] & 1) ? cycle2hc40 : cycle2hc32;
/* reinitialize overscan area */
bitmap.viewport.x = config.overscan ? 14 : 0;
bitmap.viewport.y = config.overscan ? (((reg[1] & 8) ? 0 : 8) + (vdp_pal ? 24 : 0)) : 0;
break;
}
case SDLK_F10:
{
set_softreset();
break;
}
case SDLK_F11:
{
joynum ++;
if (joynum > MAX_DEVICES - 1)
joynum = 0;
break;
}
case SDLK_F12:
{
config.overscan ^= 1;
bitmap.viewport.x = config.overscan ? ((reg[12] & 1) ? 16 : 12) : 0;
bitmap.viewport.y = config.overscan ? (((reg[1] & 8) ? 0 : 8) + (vdp_pal ? 24 : 0)) : 0;
bitmap.viewport.changed = 1;
break;
}
case SDLK_ESCAPE:
{
return 0;
}
default:
break;
}
return 1;
}
int sdl_input_update(void)
{
uint8 *keystate = SDL_GetKeyState(NULL);
while (input.dev[joynum] == NO_DEVICE)
{
joynum ++;
if (joynum > MAX_DEVICES - 1) joynum = 0;
}
/* reset input */
input.pad[joynum] = 0;
/* keyboard */
if(keystate[SDLK_a]) input.pad[joynum] |= INPUT_A;
if(keystate[SDLK_s]) input.pad[joynum] |= INPUT_B;
if(keystate[SDLK_d]) input.pad[joynum] |= INPUT_C;
if(keystate[SDLK_f]) input.pad[joynum] |= INPUT_START;
if(keystate[SDLK_z]) input.pad[joynum] |= INPUT_X;
if(keystate[SDLK_x]) input.pad[joynum] |= INPUT_Y;
if(keystate[SDLK_c]) input.pad[joynum] |= INPUT_Z;
if(keystate[SDLK_v]) input.pad[joynum] |= INPUT_MODE;
switch (input.dev[joynum])
{
case DEVICE_LIGHTGUN:
{
/* get mouse (absolute values) */
int x,y;
int state = SDL_GetMouseState(&x,&y);
/* Calculate X Y axis values */
input.analog[joynum - 4][0] = (x * bitmap.viewport.w) / 640;
input.analog[joynum - 4][1] = (y * bitmap.viewport.h) / 480;
/* Map mouse buttons to player #1 inputs */
if(state & SDL_BUTTON_MMASK) input.pad[joynum] |= INPUT_C;
if(state & SDL_BUTTON_RMASK) input.pad[joynum] |= INPUT_B;
if(state & SDL_BUTTON_LMASK) input.pad[joynum] |= INPUT_A;
break;
}
case DEVICE_MOUSE:
{
/* get mouse (relative values) */
int x,y;
int state = SDL_GetRelativeMouseState(&x,&y);
/* Sega Mouse range is -256;+256 */
input.analog[2][0] = x;
input.analog[2][1] = y;
/* Vertical movement is upsidedown */
if (!config.invert_mouse) input.analog[2][1] = 0 - input.analog[2][1];
/* Map mouse buttons to player #1 inputs */
if(state & SDL_BUTTON_MMASK) input.pad[joynum] |= INPUT_C;
if(state & SDL_BUTTON_RMASK) input.pad[joynum] |= INPUT_B;
if(state & SDL_BUTTON_LMASK) input.pad[joynum] |= INPUT_A;
break;
}
default:
{
if(keystate[SDLK_UP]) input.pad[joynum] |= INPUT_UP;
else
if(keystate[SDLK_DOWN]) input.pad[joynum] |= INPUT_DOWN;
if(keystate[SDLK_LEFT]) input.pad[joynum] |= INPUT_LEFT;
else
if(keystate[SDLK_RIGHT]) input.pad[joynum] |= INPUT_RIGHT;
break;
}
}
if (system_hw == SYSTEM_PICO)
{
/* get mouse (absolute values) */
int x,y;
int state = SDL_GetMouseState(&x,&y);
/* Calculate X Y axis values */
input.analog[0][0] = 0x3c + (x * (0x17c-0x03c+1)) / 640;
input.analog[0][1] = 0x1fc + (y * (0x2f7-0x1fc+1)) / 480;
/* Map mouse buttons to player #1 inputs */
if(state & SDL_BUTTON_MMASK) pico_current++;
if(state & SDL_BUTTON_RMASK) input.pad[joynum] |= INPUT_B;
if(state & SDL_BUTTON_LMASK) input.pad[joynum] |= INPUT_A;
}
free (keystate);
return 1;
}
int main (int argc, char **argv)
{
int running = 1;
/* Print help if no game specified */
if(argc < 2)
{
char caption[256];
sprintf(caption, "Genesis Plus\\SDL by Charles MacDonald\nWWW: http://cgfm2.emuviews.com\nusage: %s gamename\n", argv[0]);
MessageBox(NULL, caption, "Information", 0);
exit(1);
}
/* set default config */
error_init();
set_config_defaults();
/* Load ROM file */
cart.rom = malloc(10*1024*1024);
memset(cart.rom, 0, 10*1024*1024);
if(!load_rom(argv[1]))
{
char caption[256];
sprintf(caption, "Error loading file `%s'.", argv[1]);
MessageBox(NULL, caption, "Error", 0);
exit(1);
}
/* load BIOS */
memset(bios_rom, 0, sizeof(bios_rom));
FILE *f = fopen(OS_ROM, "rb");
if (f!=NULL)
{
fread(&bios_rom, 0x800,1,f);
fclose(f);
int i;
for(i = 0; i < 0x800; i += 2)
{
uint8 temp = bios_rom[i];
bios_rom[i] = bios_rom[i+1];
bios_rom[i+1] = temp;
}
config.bios_enabled |= 2;
}
/* initialize SDL */
if(SDL_Init(0) < 0)
{
char caption[256];
sprintf(caption, "SDL initialization failed");
MessageBox(NULL, caption, "Error", 0);
exit(1);
}
sdl_video_init();
if (use_sound)
sdl_sound_init();
sdl_sync_init();
/* initialize Genesis virtual system */
SDL_LockSurface(sdl_video.surf_bitmap);
memset(&bitmap, 0, sizeof(t_bitmap));
bitmap.width = 720;
bitmap.height = 576;
bitmap.depth = 16;
bitmap.granularity = 2;
bitmap.pitch = (bitmap.width * bitmap.granularity);
bitmap.data = sdl_video.surf_bitmap->pixels;
SDL_UnlockSurface(sdl_video.surf_bitmap);
/* initialize emulation */
system_init();
audio_init(SOUND_FREQUENCY);
/* load SRAM */
f = fopen("./game.srm", "rb");
if (f!=NULL)
{
fread(sram.sram,0x10000,1, f);
fclose(f);
}
/* reset emulation */
system_reset();
if(use_sound)
SDL_PauseAudio(0);
if(sdl_sync.sem_sync)
SDL_SetTimer(vdp_pal ? 60 : 50, sdl_sync_timer_callback); /* 3 frames = 50 ms (60hz) or 60 ms (50hz) */
/* emulation loop */
while(running)
{
SDL_Event event;
if (SDL_PollEvent(&event))
{
switch(event.type)
{
case SDL_QUIT:
running = 0;
break;
case SDL_KEYDOWN:
running = sdl_control_update(event.key.keysym.sym);
break;
}
}
sdl_video_update();
audio_update(snd.buffer_size);
if(use_sound)
sdl_sound_update();
if(!turbo_mode && sdl_sync.sem_sync && sdl_video.frames_rendered % 3 == 0)
{
SDL_SemWait(sdl_sync.sem_sync);
}
}
/* save SRAM */
f = fopen("./game.srm", "wb");
if (f!=NULL)
{
fwrite(&sram.sram,0x10000,1, f);
fclose(f);
}
system_shutdown();
audio_shutdown();
error_shutdown();
free(cart.rom);
sdl_video_close();
if (use_sound)
sdl_sound_close();
sdl_sync_close();
SDL_Quit();
return 0;
}
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