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libpicofe/gp2x/emu.c
notaz 2b395ee02a Pico fixes 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@446 be3aeb3a-fb24-0410-a615-afba39da0efa
2008-05-16 19:18:40 +00:00

1056 lines
29 KiB
C
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// (c) Copyright 2006-2007 notaz, All rights reserved.
// Free for non-commercial use.
// For commercial use, separate licencing terms must be obtained.
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/limits.h>
#include <ctype.h>
#include <unistd.h>
#include <stdarg.h>
#include "emu.h"
#include "gp2x.h"
#include "usbjoy.h"
#include "menu.h"
#include "../common/arm_utils.h"
#include "../common/fonts.h"
#include "../common/emu.h"
#include "../common/config.h"
#include "cpuctrl.h"
#include <Pico/PicoInt.h>
#include <Pico/Patch.h>
#include <Pico/sound/mix.h>
#include <zlib/zlib.h>
//#define PFRAMES
#ifdef BENCHMARK
#define OSD_FPS_X 220
#else
#define OSD_FPS_X 260
#endif
int engineState;
int select_exits = 0;
char romFileName[PATH_MAX];
extern int crashed_940;
static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
static struct timeval noticeMsgTime = { 0, 0 }; // when started showing
static int osd_fps_x;
static int gp2x_old_gamma = 100;
char noticeMsg[64]; // notice msg to draw
unsigned char *PicoDraw2FB = NULL; // temporary buffer for alt renderer
int reset_timing = 0;
#define PICO_PEN_ADJUST_X 4
#define PICO_PEN_ADJUST_Y 2
static int pico_pen_x = 320/2, pico_pen_y = 240/2, pico_inp_mode = 0;
static void emu_msg_cb(const char *msg);
static void emu_msg_tray_open(void);
void emu_noticeMsgUpdated(void)
{
gettimeofday(&noticeMsgTime, 0);
}
void emu_getMainDir(char *dst, int len)
{
extern char **g_argv;
int j;
strncpy(dst, g_argv[0], len);
len -= 32; // reserve
if (len < 0) len = 0;
dst[len] = 0;
for (j = strlen(dst); j > 0; j--)
if (dst[j] == '/') { dst[j+1] = 0; break; }
}
void emu_Init(void)
{
// make temp buffer for alt renderer
PicoDraw2FB = malloc((8+320)*(8+240+8));
if (!PicoDraw2FB)
{
printf("PicoDraw2FB == 0\n");
}
// make dirs for saves, cfgs, etc.
mkdir("mds", 0777);
mkdir("srm", 0777);
mkdir("brm", 0777);
mkdir("cfg", 0777);
PicoInit();
PicoMessage = emu_msg_cb;
PicoMCDopenTray = emu_msg_tray_open;
PicoMCDcloseTray = menu_loop_tray;
}
static void scaling_update(void)
{
PicoOpt &= ~0x4100;
switch (currentConfig.scaling) {
default: break; // off
case 1: // hw hor
case 2: PicoOpt |= 0x0100; break; // hw hor+vert
case 3: PicoOpt |= 0x4000; break; // sw hor
}
}
void emu_Deinit(void)
{
// save SRAM
if((currentConfig.EmuOpt & 1) && SRam.changed) {
emu_SaveLoadGame(0, 1);
SRam.changed = 0;
}
if (!(currentConfig.EmuOpt & 0x20)) {
config_writelrom(PicoConfigFile);
#ifndef NO_SYNC
sync();
#endif
}
free(PicoDraw2FB);
PicoExit();
// restore gamma
if (gp2x_old_gamma != 100)
set_gamma(100, 0);
}
void emu_prepareDefaultConfig(void)
{
memset(&defaultConfig, 0, sizeof(defaultConfig));
defaultConfig.EmuOpt = 0x1d | 0x00700; // | <- ram_tmng, confirm_save, cd_leds
defaultConfig.s_PicoOpt = 0x0f | 0x20e00; // | <- use_940, cd_pcm, cd_cdda, svp drc
defaultConfig.s_PsndRate = 44100;
defaultConfig.s_PicoRegion = 0; // auto
defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
defaultConfig.s_PicoCDBuffers = 0;
defaultConfig.Frameskip = -1; // auto
defaultConfig.CPUclock = 200;
defaultConfig.volume = 50;
defaultConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU
defaultConfig.KeyBinds[ 4] = 1<<1;
defaultConfig.KeyBinds[ 2] = 1<<2;
defaultConfig.KeyBinds[ 6] = 1<<3;
defaultConfig.KeyBinds[14] = 1<<4;
defaultConfig.KeyBinds[13] = 1<<5;
defaultConfig.KeyBinds[12] = 1<<6;
defaultConfig.KeyBinds[ 8] = 1<<7;
defaultConfig.KeyBinds[15] = 1<<26; // switch rend
defaultConfig.KeyBinds[10] = 1<<27; // save state
defaultConfig.KeyBinds[11] = 1<<28; // load state
defaultConfig.KeyBinds[23] = 1<<29; // vol up
defaultConfig.KeyBinds[22] = 1<<30; // vol down
defaultConfig.gamma = 100;
defaultConfig.scaling = 0;
}
void emu_setDefaultConfig(void)
{
memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));
PicoOpt = currentConfig.s_PicoOpt;
PsndRate = currentConfig.s_PsndRate;
PicoRegionOverride = currentConfig.s_PicoRegion;
PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;
PicoCDBuffers = currentConfig.s_PicoCDBuffers;
}
void osd_text(int x, int y, const char *text)
{
int len = strlen(text)*8;
if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
int *p, i, h;
x &= ~3; // align x
len = (len+3) >> 2;
for (h = 0; h < 8; h++) {
p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));
for (i = len; i; i--, p++) *p = 0xe0e0e0e0;
}
emu_textOut8(x, y, text);
} else {
int *p, i, h;
x &= ~1; // align x
len = (len+1) >> 1;
for (h = 0; h < 8; h++) {
p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));
for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;
}
emu_textOut16(x, y, text);
}
}
static void draw_cd_leds(void)
{
// static
int old_reg;
// if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?
old_reg = Pico_mcd->s68k_regs[0];
if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
// 8-bit modes
unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;
unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;
*(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =
*(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =
*(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;
*(unsigned int *)((char *)gp2x_screen + 320*2+12) =
*(unsigned int *)((char *)gp2x_screen + 320*3+12) =
*(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;
} else {
// 16-bit modes
unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);
unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;
unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;
*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;
*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;
*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
}
}
static void draw_pico_ptr(void)
{
unsigned short *p = (unsigned short *)gp2x_screen;
// only if pen enabled and for 16bit modes
if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;
if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))
p += 32;
p += 320 * (pico_pen_y + PICO_PEN_ADJUST_Y);
p += pico_pen_x + PICO_PEN_ADJUST_X;
p[0] ^= 0xffff;
p[319] ^= 0xffff;
p[320] ^= 0xffff;
p[321] ^= 0xffff;
p[640] ^= 0xffff;
}
static int EmuScanBegin16(unsigned int num)
{
if (!(Pico.video.reg[1]&8)) num += 8;
DrawLineDest = (unsigned short *) gp2x_screen + 320 * num;
return 0;
}
static int EmuScanBegin8(unsigned int num)
{
if (!(Pico.video.reg[1]&8)) num += 8;
DrawLineDest = (unsigned char *) gp2x_screen + 320 * num;
return 0;
}
int localPal[0x100];
static void (*vidCpyM2)(void *dest, void *src) = NULL;
static void blit(const char *fps, const char *notice)
{
int emu_opt = currentConfig.EmuOpt;
if (PicoOpt&0x10)
{
// 8bit fast renderer
if (Pico.m.dirtyPal) {
Pico.m.dirtyPal = 0;
vidConvCpyRGB32(localPal, Pico.cram, 0x40);
// feed new palette to our device
gp2x_video_setpalette(localPal, 0x40);
}
// a hack for VR
if (PicoRead16Hook == PicoSVPRead16)
memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
// do actual copy
vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);
}
else if (!(emu_opt&0x80))
{
// 8bit accurate renderer
if (Pico.m.dirtyPal)
{
Pico.m.dirtyPal = 0;
if(Pico.video.reg[0xC]&8) { // shadow/hilight mode
vidConvCpyRGB32(localPal, Pico.cram, 0x40);
vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);
memcpy32(localPal+0xc0, localPal+0x40, 0x40);
localPal[0xc0] = 0x0000c000;
localPal[0xd0] = 0x00c00000;
localPal[0xe0] = 0x00000000; // reserved pixels for OSD
localPal[0xf0] = 0x00ffffff;
gp2x_video_setpalette(localPal, 0x100);
} else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes
vidConvCpyRGB32(localPal, Pico.cram, 0x40);
vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);
vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);
gp2x_video_setpalette(localPal, 0xc0);
} else {
vidConvCpyRGB32(localPal, Pico.cram, 0x40);
gp2x_video_setpalette(localPal, 0x40);
}
}
}
if (notice || (emu_opt & 2)) {
int h = 232;
if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;
if (notice) osd_text(4, h, notice);
if (emu_opt & 2)
osd_text(osd_fps_x, h, fps);
}
if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
draw_cd_leds();
if (PicoAHW & PAHW_PICO)
draw_pico_ptr();
//gp2x_video_wait_vsync();
gp2x_video_flip();
if (!(PicoOpt&0x10)) {
if (!(Pico.video.reg[1]&8)) {
if (currentConfig.EmuOpt&0x80) {
DrawLineDest = (unsigned short *) gp2x_screen + 320*8;
} else {
DrawLineDest = (unsigned char *) gp2x_screen + 320*8;
}
} else {
DrawLineDest = gp2x_screen;
}
}
}
// clears whole screen or just the notice area (in all buffers)
static void clearArea(int full)
{
if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
// 8-bit renderers
if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);
else gp2x_memset_all_buffers(320*232, 0xe0, 320*8);
} else {
// 16bit accurate renderer
if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);
else gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);
}
}
static void vidResetMode(void)
{
if (PicoOpt&0x10) {
gp2x_video_changemode(8);
} else if (currentConfig.EmuOpt&0x80) {
gp2x_video_changemode(16);
PicoDrawSetColorFormat(1);
PicoScanBegin = EmuScanBegin16;
} else {
gp2x_video_changemode(8);
PicoDrawSetColorFormat(2);
PicoScanBegin = EmuScanBegin8;
}
if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
// setup pal for 8-bit modes
localPal[0xc0] = 0x0000c000; // MCD LEDs
localPal[0xd0] = 0x00c00000;
localPal[0xe0] = 0x00000000; // reserved pixels for OSD
localPal[0xf0] = 0x00ffffff;
gp2x_video_setpalette(localPal, 0x100);
gp2x_memset_all_buffers(0, 0xe0, 320*240);
gp2x_video_flip();
}
Pico.m.dirtyPal = 1;
// reset scaling
if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))
gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);
else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);
}
static void emu_msg_cb(const char *msg)
{
if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
// 8-bit renderers
gp2x_memset_all_buffers(320*232, 0xe0, 320*8);
osd_text(4, 232, msg);
gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232, 320*232, 320*8);
} else {
// 16bit accurate renderer
gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);
osd_text(4, 232, msg);
gp2x_memcpy_all_buffers((char *)gp2x_screen+320*232*2, 320*232*2, 320*8*2);
}
gettimeofday(&noticeMsgTime, 0);
noticeMsgTime.tv_sec -= 2;
/* assumption: emu_msg_cb gets called only when something slow is about to happen */
reset_timing = 1;
}
static void emu_state_cb(const char *str)
{
clearArea(0);
blit("", str);
}
static void emu_msg_tray_open(void)
{
strcpy(noticeMsg, "CD tray opened");
gettimeofday(&noticeMsgTime, 0);
}
static void RunEventsPico(unsigned int events, unsigned int gp2x_keys)
{
if (events & (1 << 3)) {
pico_inp_mode++;
if (pico_inp_mode > 2) pico_inp_mode = 0;
switch (pico_inp_mode) {
case 2: strcpy(noticeMsg, "Input: Pen on Pad "); break;
case 1: strcpy(noticeMsg, "Input: Pen on Storyware"); break;
case 0: strcpy(noticeMsg, "Input: Joytick ");
PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;
break;
}
gettimeofday(&noticeMsgTime, 0);
}
if (events & (1 << 4)) {
PicoPicohw.page--;
if (PicoPicohw.page < 0) PicoPicohw.page = 0;
sprintf(noticeMsg, "Page %i ", PicoPicohw.page);
gettimeofday(&noticeMsgTime, 0);
}
if (events & (1 << 5)) {
PicoPicohw.page++;
if (PicoPicohw.page > 6) PicoPicohw.page = 6;
sprintf(noticeMsg, "Page %i ", PicoPicohw.page);
gettimeofday(&noticeMsgTime, 0);
}
if (pico_inp_mode != 0) {
PicoPad[0] &= ~0x0f; // release UDLR
if (gp2x_keys & GP2X_UP) { pico_pen_y--; if (pico_pen_y < 0) pico_pen_y = 0; }
if (gp2x_keys & GP2X_DOWN) { pico_pen_y++; if (pico_pen_y > 239-PICO_PEN_ADJUST_Y) pico_pen_y = 239-PICO_PEN_ADJUST_Y; }
if (gp2x_keys & GP2X_LEFT) { pico_pen_x--; if (pico_pen_x < 0) pico_pen_x = 0; }
if (gp2x_keys & GP2X_RIGHT) {
int lim = (Pico.video.reg[12]&1) ? 319 : 255;
pico_pen_x++;
if (pico_pen_x > lim-PICO_PEN_ADJUST_X)
pico_pen_x = lim-PICO_PEN_ADJUST_X;
}
PicoPicohw.pen_pos[0] = pico_pen_x;
if (!(Pico.video.reg[12]&1)) PicoPicohw.pen_pos[0] += pico_pen_x/4;
PicoPicohw.pen_pos[0] += 0x3c;
PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);
}
}
static void update_volume(int has_changed, int is_up)
{
static int prev_frame = 0, wait_frames = 0;
int vol = currentConfig.volume;
if (has_changed)
{
if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)
wait_frames++;
else {
if (is_up) {
if (vol < 99) vol++;
} else {
if (vol > 0) vol--;
}
wait_frames = 0;
gp2x_sound_volume(vol, vol);
currentConfig.volume = vol;
}
sprintf(noticeMsg, "VOL: %02i", vol);
gettimeofday(&noticeMsgTime, 0);
prev_frame = Pico.m.frame_count;
}
// set the right mixer func
if (!(PicoOpt&8)) return; // just use defaults for mono
if (vol >= 5)
PsndMix_32_to_16l = mix_32_to_16l_stereo;
else {
mix_32_to_16l_level = 5 - vol;
PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;
}
}
static void change_fast_forward(int set_on)
{
static void *set_PsndOut = NULL;
static int set_Frameskip, set_EmuOpt, is_on = 0;
if (set_on && !is_on) {
set_PsndOut = PsndOut;
set_Frameskip = currentConfig.Frameskip;
set_EmuOpt = currentConfig.EmuOpt;
PsndOut = NULL;
currentConfig.Frameskip = 8;
currentConfig.EmuOpt &= ~4;
is_on = 1;
}
else if (!set_on && is_on) {
PsndOut = set_PsndOut;
currentConfig.Frameskip = set_Frameskip;
currentConfig.EmuOpt = set_EmuOpt;
PsndRerate(1);
update_volume(0, 0);
reset_timing = 1;
is_on = 0;
}
}
static void RunEvents(unsigned int which)
{
if (which & 0x1800) // save or load (but not both)
{
int do_it = 1;
if ( emu_checkSaveFile(state_slot) &&
(( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
(!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save
unsigned long keys;
blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");
while ( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )
usleep(50*1024);
if (keys & GP2X_X) do_it = 0;
while ( gp2x_joystick_read(1) & (GP2X_X|GP2X_Y) ) // wait for release
usleep(50*1024);
clearArea(0);
}
if (do_it) {
osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
PicoStateProgressCB = emu_state_cb;
gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);
emu_SaveLoadGame((which & 0x1000) >> 12, 0);
PicoStateProgressCB = NULL;
}
reset_timing = 1;
}
if (which & 0x0400) // switch renderer
{
if ( PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }
else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;
else currentConfig.EmuOpt &= ~0x80;
vidResetMode();
if (PicoOpt&0x10) {
strcpy(noticeMsg, " 8bit fast renderer");
} else if (currentConfig.EmuOpt&0x80) {
strcpy(noticeMsg, "16bit accurate renderer");
} else {
strcpy(noticeMsg, " 8bit accurate renderer");
}
gettimeofday(&noticeMsgTime, 0);
}
if (which & 0x0300)
{
if(which&0x0200) {
state_slot -= 1;
if(state_slot < 0) state_slot = 9;
} else {
state_slot += 1;
if(state_slot > 9) state_slot = 0;
}
sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
gettimeofday(&noticeMsgTime, 0);
}
if (which & 0x0080) {
engineState = PGS_Menu;
}
}
static void updateKeys(void)
{
unsigned int keys, keys2, allActions[2] = { 0, 0 }, events;
static unsigned int prevEvents = 0;
int joy, i;
keys = gp2x_joystick_read(0);
if (keys & GP2X_SELECT) {
engineState = select_exits ? PGS_Quit : PGS_Menu;
// wait until select is released, so menu would not resume game
while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);
}
keys &= CONFIGURABLE_KEYS;
keys2 = keys;
for (i = 0; i < 32; i++)
{
if (keys2 & (1 << i))
{
int pl, acts = currentConfig.KeyBinds[i];
if (!acts) continue;
pl = (acts >> 16) & 1;
if (kb_combo_keys & (1 << i))
{
int u = i+1, acts_c = acts & kb_combo_acts;
// let's try to find the other one
if (acts_c) {
for (; u < 32; u++)
if ( (keys2 & (1 << u)) && (currentConfig.KeyBinds[u] & acts_c) ) {
allActions[pl] |= acts_c & currentConfig.KeyBinds[u];
keys2 &= ~((1 << i) | (1 << u));
break;
}
}
// add non-combo actions if combo ones were not found
if (!acts_c || u == 32)
allActions[pl] |= acts & ~kb_combo_acts;
} else {
allActions[pl] |= acts;
}
}
}
// add joy inputs
if (num_of_joys > 0)
{
gp2x_usbjoy_update();
for (joy = 0; joy < num_of_joys; joy++) {
int btns = gp2x_usbjoy_check2(joy);
for (i = 0; i < 32; i++) {
if (btns & (1 << i)) {
int acts = currentConfig.JoyBinds[joy][i];
int pl = (acts >> 16) & 1;
allActions[pl] |= acts;
}
}
}
}
PicoPad[0] = (unsigned short) allActions[0];
PicoPad[1] = (unsigned short) allActions[1];
events = (allActions[0] | allActions[1]) >> 16;
// volume is treated in special way and triggered every frame
if (events & 0x6000)
update_volume(1, events & 0x2000);
if ((events ^ prevEvents) & 0x40)
change_fast_forward(events & 0x40);
events &= ~prevEvents;
if (PicoAHW == PAHW_PICO)
RunEventsPico(events, keys);
if (events) RunEvents(events);
if (movie_data) emu_updateMovie();
prevEvents = (allActions[0] | allActions[1]) >> 16;
}
static void updateSound(int len)
{
if (PicoOpt&8) len<<=1;
/* avoid writing audio when lagging behind to prevent audio lag */
if (PicoSkipFrame != 2)
gp2x_sound_write(PsndOut, len<<1);
}
static void SkipFrame(int do_audio)
{
PicoSkipFrame=do_audio ? 1 : 2;
PicoFrame();
PicoSkipFrame=0;
}
void emu_forcedFrame(void)
{
int po_old = PicoOpt;
int eo_old = currentConfig.EmuOpt;
PicoOpt &= ~0x0010;
PicoOpt |= 0x4080; // soft_scale | acc_sprites
currentConfig.EmuOpt |= 0x80;
//vidResetMode();
PicoDrawSetColorFormat(1);
PicoScanBegin = EmuScanBegin16;
Pico.m.dirtyPal = 1;
PicoFrameDrawOnly();
/*
if (!(Pico.video.reg[12]&1)) {
vidCpyM2 = vidCpyM2_32col;
clearArea(1);
} else vidCpyM2 = vidCpyM2_40col;
vidCpyM2((unsigned char *)gp2x_screen+320*8, PicoDraw2FB+328*8);
vidConvCpyRGB32(localPal, Pico.cram, 0x40);
gp2x_video_setpalette(localPal, 0x40);
*/
PicoOpt = po_old;
currentConfig.EmuOpt = eo_old;
}
static void simpleWait(int thissec, int lim_time)
{
struct timeval tval;
spend_cycles(1024);
gettimeofday(&tval, 0);
if (thissec != tval.tv_sec) tval.tv_usec+=1000000;
while (tval.tv_usec < lim_time)
{
spend_cycles(1024);
gettimeofday(&tval, 0);
if (thissec != tval.tv_sec) tval.tv_usec+=1000000;
}
}
#if 0
static void tga_dump(void)
{
#define BYTE unsigned char
#define WORD unsigned short
struct
{
BYTE IDLength; /* 00h Size of Image ID field */
BYTE ColorMapType; /* 01h Color map type */
BYTE ImageType; /* 02h Image type code */
WORD CMapStart; /* 03h Color map origin */
WORD CMapLength; /* 05h Color map length */
BYTE CMapDepth; /* 07h Depth of color map entries */
WORD XOffset; /* 08h X origin of image */
WORD YOffset; /* 0Ah Y origin of image */
WORD Width; /* 0Ch Width of image */
WORD Height; /* 0Eh Height of image */
BYTE PixelDepth; /* 10h Image pixel size */
BYTE ImageDescriptor; /* 11h Image descriptor byte */
} __attribute__((packed)) TGAHEAD;
static unsigned short oldscr[320*240];
FILE *f; char name[128]; int i;
memset(&TGAHEAD, 0, sizeof(TGAHEAD));
TGAHEAD.ImageType = 2;
TGAHEAD.Width = 320;
TGAHEAD.Height = 240;
TGAHEAD.PixelDepth = 16;
TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left
#define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?
for (i = 0; i < 320*240; i++)
if(oldscr[i] != CONV(((unsigned short *)gp2x_screen)[i])) break;
if (i < 320*240)
{
for (i = 0; i < 320*240; i++)
oldscr[i] = CONV(((unsigned short *)gp2x_screen)[i]);
sprintf(name, "%05i.tga", Pico.m.frame_count);
f = fopen(name, "wb");
if (!f) { printf("!f\n"); exit(1); }
fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);
fwrite(oldscr, 1, 320*240*2, f);
fclose(f);
}
}
#endif
void emu_Loop(void)
{
static int gp2x_old_clock = 200;
static int PsndRate_old = 0, PicoOpt_old = 0, EmuOpt_old = 0, pal_old = 0;
char fpsbuff[24]; // fps count c string
struct timeval tval; // timing
int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync
int frames_done, frames_shown, thissec; // actual frames
int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;
char *notice = 0;
printf("entered emu_Loop()\n");
if (gp2x_old_clock != currentConfig.CPUclock) {
printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);
set_FCLK(currentConfig.CPUclock);
gp2x_old_clock = currentConfig.CPUclock;
printf(" done\n");
}
if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {
set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));
gp2x_old_gamma = currentConfig.gamma;
printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));
}
if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {
if (currentConfig.EmuOpt&0x2000)
set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);
else unset_LCD_custom_rate();
}
EmuOpt_old = currentConfig.EmuOpt;
fpsbuff[0] = 0;
// make sure we are in correct mode
vidResetMode();
scaling_update();
Pico.m.dirtyPal = 1;
oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
emu_findKeyBindCombos();
// pal/ntsc might have changed, reset related stuff
target_fps = Pico.m.pal ? 50 : 60;
target_frametime = 1000000/target_fps;
reset_timing = 1;
// prepare sound stuff
if (currentConfig.EmuOpt & 4)
{
int snd_excess_add;
if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||
((PicoOpt&0x200) && crashed_940)) {
PsndRerate(Pico.m.frame_count ? 1 : 0);
}
snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);
gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);
gp2x_sound_volume(currentConfig.volume, currentConfig.volume);
PicoWriteSound = updateSound;
update_volume(0, 0);
memset(sndBuffer, 0, sizeof(sndBuffer));
PsndOut = sndBuffer;
PsndRate_old = PsndRate;
PicoOpt_old = PicoOpt;
pal_old = Pico.m.pal;
} else {
PsndOut = NULL;
}
// prepare CD buffer
if (PicoAHW & PAHW_MCD) PicoCDBufferInit();
// calc vsync offset to sync timing code with vsync
if (currentConfig.EmuOpt&0x2000) {
gettimeofday(&tval, 0);
gp2x_video_wait_vsync();
gettimeofday(&tval, 0);
vsync_offset = tval.tv_usec;
while (vsync_offset >= target_frametime)
vsync_offset -= target_frametime;
if (!vsync_offset) vsync_offset++;
printf("vsync_offset: %i\n", vsync_offset);
} else
vsync_offset = 0;
frames_done = frames_shown = thissec =
pframes_done = pframes_shown = pthissec = 0;
// loop
while (engineState == PGS_Running)
{
int modes;
gettimeofday(&tval, 0);
if (reset_timing) {
reset_timing = 0;
pthissec = tval.tv_sec;
pframes_shown = pframes_done = tval.tv_usec/target_frametime;
}
// show notice message?
if (noticeMsgTime.tv_sec)
{
static int noticeMsgSum;
if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec
noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;
clearArea(0);
notice = 0;
} else {
int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
notice = noticeMsg;
}
}
// check for mode changes
modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
if (modes != oldmodes)
{
int scalex = 320;
osd_fps_x = OSD_FPS_X;
if (modes & 4) {
vidCpyM2 = vidCpyM2_40col;
} else {
if (PicoOpt & 0x100) {
vidCpyM2 = vidCpyM2_32col_nobord;
scalex = 256;
osd_fps_x = OSD_FPS_X - 64;
} else {
vidCpyM2 = vidCpyM2_32col;
}
}
if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode
gp2x_video_RGB_setscaling(8, scalex, 224);
else gp2x_video_RGB_setscaling(0, scalex, 240);
oldmodes = modes;
clearArea(1);
}
// second changed?
if (thissec != tval.tv_sec)
{
#ifdef BENCHMARK
static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
if (++bench == 10) {
bench = 0;
bench_fps_s = bench_fps;
bf[bfp++ & 3] = bench_fps;
bench_fps = 0;
}
bench_fps += frames_shown;
sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
#else
if (currentConfig.EmuOpt & 2) {
sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }
}
#endif
frames_shown = frames_done = 0;
thissec = tval.tv_sec;
}
#ifdef PFRAMES
sprintf(fpsbuff, "%i", Pico.m.frame_count);
#endif
if (pthissec != tval.tv_sec)
{
if (PsndOut == 0 && currentConfig.Frameskip >= 0) {
pframes_done = pframes_shown = 0;
} else {
// it is quite common for this implementation to leave 1 fame unfinished
// when second changes, but we don't want buffer to starve.
if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {
updateKeys();
SkipFrame(1); pframes_done++;
}
pframes_done -= target_fps; if (pframes_done < 0) pframes_done = 0;
pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;
if (pframes_shown > pframes_done) pframes_shown = pframes_done;
}
pthissec = tval.tv_sec;
}
lim_time = (pframes_done+1) * target_frametime + vsync_offset;
if (currentConfig.Frameskip >= 0) // frameskip enabled
{
for(i = 0; i < currentConfig.Frameskip; i++) {
updateKeys();
SkipFrame(1); pframes_done++; frames_done++;
if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled
gettimeofday(&tval, 0);
if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;
if (tval.tv_usec < lim_time) { // we are too fast
simpleWait(pthissec, lim_time);
}
}
lim_time += target_frametime;
}
}
else if (tval.tv_usec > lim_time) // auto frameskip
{
// no time left for this frame - skip
if (tval.tv_usec - lim_time >= 300000) {
/* something caused a slowdown for us (disk access? cache flush?)
* try to recover by resetting timing... */
reset_timing = 1;
continue;
}
updateKeys();
SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;
continue;
}
updateKeys();
PicoFrame();
// check time
gettimeofday(&tval, 0);
if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;
if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection
reset_timing = 1;
else if (PsndOut != NULL || currentConfig.Frameskip < 0)
{
// sleep or vsync if we are still too fast
// usleep sleeps for ~20ms minimum, so it is not a solution here
if (!reset_timing && tval.tv_usec < lim_time)
{
// we are too fast
if (vsync_offset) {
if (lim_time - tval.tv_usec > target_frametime/2)
simpleWait(pthissec, lim_time - target_frametime/4);
gp2x_video_wait_vsync();
} else {
simpleWait(pthissec, lim_time);
}
}
}
blit(fpsbuff, notice);
pframes_done++; pframes_shown++;
frames_done++; frames_shown++;
}
change_fast_forward(0);
if (PicoAHW & PAHW_MCD) PicoCDBufferFree();
// save SRAM
if((currentConfig.EmuOpt & 1) && SRam.changed) {
emu_state_cb("Writing SRAM/BRAM..");
emu_SaveLoadGame(0, 1);
SRam.changed = 0;
}
// if in 8bit mode, generate 16bit image for menu background
if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))
emu_forcedFrame();
}
void emu_ResetGame(void)
{
PicoReset();
reset_timing = 1;
}
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