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desmume.c

/* desmume.c - this file is part of DeSmuME
 *
 * Copyright (C) 2006,2007 DeSmuME Team
 * Copyright (C) 2007 Pascal Giard (evilynux)
 *
 * This file 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, or (at your option)
 * any later version.
 *
 * This file 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "desmume.h"

#define EMULOOP_PRIO (G_PRIORITY_HIGH_IDLE + 20)
gboolean EmuLoop(gpointer data);
static BOOL regMainLoop = FALSE;


volatile BOOL execute = FALSE;
BOOL click = FALSE;
BOOL fini = FALSE;
unsigned long glock = 0;
int savetype=MC_TYPE_AUTODETECT;
u32 savesize=1;

void desmume_mem_init();

u8 *desmume_rom_data = NULL;
u32 desmume_last_cycle;

void desmume_init()
{
      NDS_Init();
        SPU_ChangeSoundCore(SNDCORE_SDL, 735 * 4);
      execute = FALSE;
}

void desmume_free()
{
      execute = FALSE;
      NDS_DeInit();
}

int desmume_open(const char *filename)
{
  int i;
  clear_savestates();
  i = NDS_LoadROM(filename, savetype, savesize);
  return i;
}

void desmume_savetype(int type) {
      mmu_select_savetype(type, &savetype, &savesize);
}


void desmume_pause()
{
      execute = FALSE;
      SPU_Pause(1);
}

void desmume_resume()
{
      SPU_Pause(0);
      execute = TRUE;
      if(!regMainLoop)
            g_idle_add_full(EMULOOP_PRIO, &EmuLoop, NULL, NULL);
      regMainLoop = TRUE;
}

void desmume_reset()
{
      NDS_Reset();
      desmume_resume();
}

void desmume_toggle()
{
      execute = (execute) ? FALSE : TRUE;
}
BOOL desmume_running()
{
      return execute;
}

void desmume_cycle()
{
  u16 keypad;
  /* Joystick events */
  /* Retrieve old value: can use joysticks w/ another device (from our side) */
  keypad = get_keypad();
  /* Process joystick events if any */
  keypad = process_ctrls_events(keypad);
  /* Update keypad value */
  update_keypad(keypad);

  desmume_last_cycle = NDS_exec((560190 << 1) - desmume_last_cycle, FALSE);
  SPU_Emulate();
}


Uint32 fps, fps_SecStart, fps_FrameCount;
static void Draw()
{
}

gboolean EmuLoop(gpointer data)
{
      int i;
      
      if(desmume_running())   /* Si on est en train d'executer le programme ... */
      {
            
            fps_FrameCount += Frameskip + 1;
            if(!fps_SecStart) fps_SecStart = SDL_GetTicks();
            if(SDL_GetTicks() - fps_SecStart >= 1000)
            {
                  fps_SecStart = SDL_GetTicks();
                  fps = fps_FrameCount;
                  fps_FrameCount = 0;
                  
                  char Title[32];
                  sprintf(Title, "Desmume - %dfps", fps);
                  gtk_window_set_title(GTK_WINDOW(pWindow), Title);
            }
            
            desmume_cycle();  /* Emule ! */
            for(i = 0; i < Frameskip; i++) desmume_cycle(); /* cycles supplémentaires pour le frameskip */
            
            Draw();
            
            notify_Tools();
            gtk_widget_queue_draw(pDrawingArea);
            gtk_widget_queue_draw(pDrawingArea2);
            
            return TRUE;
      }
      
      regMainLoop = FALSE;
      return FALSE;
}


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