pandora: tripplebuffer fbdev out, refactoring
[libpicofe.git] / pandora / emu.c
index cce5219..f7c2a2e 100644 (file)
-// (c) Copyright 2006-2008 notaz, All rights reserved.\r
+// (c) Copyright 2006-2009 notaz, All rights reserved.\r
 // Free for non-commercial use.\r
 \r
 // For commercial use, separate licencing terms must be obtained.\r
 \r
 #include <stdio.h>\r
-#include <stdlib.h>\r
-#include <sys/time.h>\r
-#include <sys/stat.h>\r
-#include <sys/types.h>\r
-#include <linux/limits.h>\r
-#include <ctype.h>\r
 #include <unistd.h>\r
 \r
-#include <stdarg.h>\r
-\r
-#include "../common/arm_utils.h"\r
-#include "../common/fonts.h"\r
 #include "../common/emu.h"\r
 #include "../common/menu.h"\r
-#include "../common/config.h"\r
-#include "../common/input.h"\r
+#include "../common/plat.h"\r
+#include "../common/arm_utils.h"\r
 #include "../linux/sndout_oss.h"\r
+#include "../linux/fbdev.h"\r
 #include "asm_utils.h"\r
+#include "version.h"\r
 \r
 #include <pico/pico_int.h>\r
-#include <pico/patch.h>\r
-#include <pico/sound/mix.h>\r
-#include <zlib/zlib.h>\r
 \r
-//#define PFRAMES\r
-#define BENCHMARK\r
 //#define USE_320_SCREEN 1\r
 \r
-#ifdef BENCHMARK\r
-#define OSD_FPS_X (800-200)\r
-#else\r
-#define OSD_FPS_X (800-120)\r
-#endif\r
-\r
 \r
 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
-static struct timeval noticeMsgTime = { 0, 0 };        // when started showing\r
-static int osd_fps_x;\r
-unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer\r
-int reset_timing = 0;\r
+static unsigned char temp_frame[g_screen_width * g_screen_height * 2];\r
+unsigned char *PicoDraw2FB = temp_frame;\r
+char cpu_clk_name[] = "unused";\r
 \r
-#define PICO_PEN_ADJUST_X 4\r
-#define PICO_PEN_ADJUST_Y 2\r
-static int pico_pen_x = 0, pico_pen_y = 240/2;\r
 \r
-static void emu_msg_cb(const char *msg);\r
-static void emu_msg_tray_open(void);\r
-\r
-\r
-void plat_status_msg(const char *format, ...)\r
+void pemu_prep_defconfig(void)\r
 {\r
-       va_list vl;\r
-\r
-       va_start(vl, format);\r
-       vsnprintf(noticeMsg, sizeof(noticeMsg), fmt, vl);\r
-       va_end(vl);\r
+       // XXX: move elsewhere\r
+       g_menubg_ptr = temp_frame;\r
 \r
-       gettimeofday(&noticeMsgTime, 0);\r
+       defaultConfig.EmuOpt |= EOPT_VSYNC;\r
 }\r
 \r
-int emu_getMainDir(char *dst, int len)\r
+void pemu_validate_config(void)\r
 {\r
-       extern char **g_argv;\r
-       int j;\r
-\r
-       strncpy(dst, g_argv[0], len);\r
-       len -= 32; // reserve\r
-       if (len < 0) len = 0;\r
-       dst[len] = 0;\r
-       for (j = strlen(dst); j > 0; j--)\r
-               if (dst[j] == '/') { dst[j+1] = 0; break; }\r
-\r
-       return j + 1;\r
 }\r
 \r
-void emu_Init(void)\r
-{\r
-       // make temp buffer for alt renderer\r
-       PicoDraw2FB = malloc((8+320)*(8+240+8));\r
-       if (!PicoDraw2FB)\r
-       {\r
-               printf("PicoDraw2FB == 0\n");\r
-       }\r
-\r
-       // make dirs for saves, cfgs, etc.\r
-       mkdir("mds", 0777);\r
-       mkdir("srm", 0777);\r
-       mkdir("brm", 0777);\r
-       mkdir("cfg", 0777);\r
-\r
-       PicoInit();\r
-       PicoMessage = emu_msg_cb;\r
-       PicoMCDopenTray = emu_msg_tray_open;\r
-       PicoMCDcloseTray = menu_loop_tray;\r
-}\r
-\r
-\r
-void emu_Deinit(void)\r
-{\r
-       // save SRAM\r
-       if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
-               emu_SaveLoadGame(0, 1);\r
-               SRam.changed = 0;\r
-       }\r
-\r
-       if (!(currentConfig.EmuOpt & 0x20)) {\r
-               config_writelrom(PicoConfigFile);\r
-#ifndef NO_SYNC\r
-               sync();\r
-#endif\r
-       }\r
-\r
-       free(PicoDraw2FB);\r
-\r
-       PicoExit();\r
-}\r
-\r
-void emu_prepareDefaultConfig(void)\r
-{\r
-       memset(&defaultConfig, 0, sizeof(defaultConfig));\r
-       defaultConfig.EmuOpt    = 0x8f | 0x00600; // | <- confirm_save, cd_leds\r
-       defaultConfig.s_PicoOpt  = 0x0f | POPT_EXT_FM|POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC;\r
-       defaultConfig.s_PicoOpt |= POPT_ACC_SPRITES|POPT_EN_MCD_GFX;\r
-       defaultConfig.EmuOpt    &= ~8; // no save gzip\r
-       defaultConfig.s_PsndRate = 44100;\r
-       defaultConfig.s_PicoRegion = 0;\r
-       defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
-       defaultConfig.s_PicoCDBuffers = 0;\r
-       defaultConfig.Frameskip = 0;\r
-       defaultConfig.CPUclock = 200;\r
-       defaultConfig.volume = 50;\r
-       defaultConfig.scaling = 0;\r
-       defaultConfig.turbo_rate = 15;\r
-}\r
-\r
-static void textOut16(int x, int y, const char *text)\r
-{\r
-       int i,l,len=strlen(text);\r
-       unsigned int *screen = (unsigned int *)((unsigned short *)g_screen_ptr + (x&~1) + y*g_screen_width);\r
-\r
-       for (i = 0; i < len; i++)\r
-       {\r
-               for (l=0;l<16;)\r
-               {\r
-                       unsigned char fd = fontdata8x8[((text[i])*8)+l/2];\r
-                       unsigned int *d = &screen[l*g_screen_width/2];\r
-                       if (fd&0x80) d[0]=0xffffffff;\r
-                       if (fd&0x40) d[1]=0xffffffff;\r
-                       if (fd&0x20) d[2]=0xffffffff;\r
-                       if (fd&0x10) d[3]=0xffffffff;\r
-                       if (fd&0x08) d[4]=0xffffffff;\r
-                       if (fd&0x04) d[5]=0xffffffff;\r
-                       if (fd&0x02) d[6]=0xffffffff;\r
-                       if (fd&0x01) d[7]=0xffffffff;\r
-                       l++; d = &screen[l*g_screen_width/2];\r
-                       if (fd&0x80) d[0]=0xffffffff;\r
-                       if (fd&0x40) d[1]=0xffffffff;\r
-                       if (fd&0x20) d[2]=0xffffffff;\r
-                       if (fd&0x10) d[3]=0xffffffff;\r
-                       if (fd&0x08) d[4]=0xffffffff;\r
-                       if (fd&0x04) d[5]=0xffffffff;\r
-                       if (fd&0x02) d[6]=0xffffffff;\r
-                       if (fd&0x01) d[7]=0xffffffff;\r
-                       l++;\r
-               }\r
-               screen += 8;\r
-       }\r
-}\r
-\r
-\r
+// FIXME: cleanup\r
 static void osd_text(int x, int y, const char *text)\r
 {\r
        int len = strlen(text)*8;\r
@@ -186,7 +51,7 @@ static void osd_text(int x, int y, const char *text)
                        p = (int *) ((unsigned char *) g_screen_ptr+x+g_screen_width*(y+h));\r
                        for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
                }\r
-               emu_textOut8(x, y, text);\r
+               emu_text_out8(x, y, text);\r
        } else {\r
                int *p, i, h;\r
                x &= ~1; // align x\r
@@ -195,7 +60,7 @@ static void osd_text(int x, int y, const char *text)
                        p = (int *) ((unsigned short *) g_screen_ptr+x+g_screen_width*(y+h));\r
                        for (i = len; i; i--, p++) *p = 0;//(*p>>2)&0x39e7;\r
                }\r
-               textOut16(x, y, text);\r
+               text_out16(x, y, text);\r
        }\r
 }\r
 \r
@@ -227,30 +92,10 @@ static void draw_cd_leds(void)
        }\r
 }\r
 \r
-static void draw_pico_ptr(void)\r
-{\r
-       unsigned short *p = (unsigned short *)g_screen_ptr;\r
-\r
-       // only if pen enabled and for 16bit modes\r
-       if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;\r
-\r
-       if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))\r
-               p += 32;\r
-\r
-       p += g_screen_width * (pico_pen_y + PICO_PEN_ADJUST_Y);\r
-       p += pico_pen_x + PICO_PEN_ADJUST_X;\r
-       p[0]   ^= 0xffff;\r
-       p[319] ^= 0xffff;\r
-       p[320] ^= 0xffff;\r
-       p[321] ^= 0xffff;\r
-       p[640] ^= 0xffff;\r
-}\r
-\r
 #ifdef USE_320_SCREEN\r
 \r
 static int EmuScanBegin16(unsigned int num)\r
 {\r
-       if (!(Pico.video.reg[1]&8)) num += 8;\r
        DrawLineDest = (unsigned short *)g_screen_ptr + num*800 + 800/2 - 320/2;\r
        //int w = (Pico.video.reg[12]&1) ? 320 : 256;\r
        //DrawLineDest = (unsigned short *)g_screen_ptr + num*w;\r
@@ -268,7 +113,6 @@ static int EmuScanEnd16(unsigned int num)
        int sh = Pico.video.reg[0xC]&8;\r
        int len, mask = 0xff;\r
 \r
-       if (!(Pico.video.reg[1]&8)) num += 8;\r
        pd=(unsigned short *)g_screen_ptr + num*800*2 + 800/2 - 320*2/2;\r
 \r
        if (Pico.m.dirtyPal)\r
@@ -300,227 +144,111 @@ static int EmuScanEnd16(unsigned int num)
        return 0;\r
 }\r
 \r
-#endif // USE_320_SCREEN\r
-\r
-int localPal[0x100];\r
-static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
-\r
-static void blit(const char *fps, const char *notice)\r
+static int EmuScanEnd16_32x(unsigned int num)\r
 {\r
-       int emu_opt = currentConfig.EmuOpt;\r
-\r
-       if (PicoOpt&0x10)\r
-       {\r
-               // 8bit fast renderer\r
-               if (Pico.m.dirtyPal) {\r
-                       Pico.m.dirtyPal = 0;\r
-                       vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
-                       // feed new palette to our device\r
-                       // gp2x_video_setpalette(localPal, 0x40);\r
-               }\r
-               // a hack for VR\r
-               if (PicoRead16Hook == PicoSVPRead16)\r
-                       memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
-               // do actual copy\r
-               vidCpyM2((unsigned char *)g_screen_ptr+g_screen_width*8, PicoDraw2FB+328*8);\r
-       }\r
-       else if (!(emu_opt&0x80))\r
-       {\r
-               // 8bit accurate renderer\r
-               if (Pico.m.dirtyPal)\r
-               {\r
-                       int pallen = 0xc0;\r
-                       Pico.m.dirtyPal = 0;\r
-                       if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
-                       {\r
-                               vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
-                               vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
-                               vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
-                               memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
-                               pallen = 0x100;\r
-                       }\r
-                       else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
-                               vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
-                               vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
-                               vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
-                               pallen = 0xc0;\r
-                       }\r
-                       else {\r
-                               vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
-                               memcpy32(localPal+0x80, localPal, 0x40);\r
-                       }\r
-                       if (pallen > 0xc0) {\r
-                               localPal[0xc0] = 0x0000c000;\r
-                               localPal[0xd0] = 0x00c00000;\r
-                               localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
-                               localPal[0xf0] = 0x00ffffff;\r
-                       }\r
-                       // gp2x_video_setpalette(localPal, pallen);\r
-               }\r
+       unsigned int *ps;\r
+       unsigned int *pd;\r
+       int len;\r
+\r
+       ps = (unsigned int *)temp_frame;\r
+       pd = (unsigned int *)g_screen_ptr + (num*800*2 + 800/2 - 320*2/2) / 2;\r
+\r
+       for (len = 320/2; len > 0; len--, ps++) {\r
+               unsigned int p, p1;\r
+               p1 = *ps;\r
+               p = p1 << 16;\r
+               p |= p >> 16;\r
+               *pd = pd[800/2] = p;\r
+               pd++;\r
+\r
+               p = p1 >> 16;\r
+               p |= p << 16;\r
+               *pd = pd[800/2] = p;\r
+               pd++;\r
        }\r
 \r
-       if (notice || (emu_opt & 2)) {\r
-               int h = g_screen_height-16;\r
-               if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 16;\r
-               if (notice) osd_text(4, h, notice);\r
-               if (emu_opt & 2)\r
-                       osd_text(osd_fps_x, h, fps);\r
+       return 0;\r
+}\r
+#endif // USE_320_SCREEN\r
+\r
+void pemu_finalize_frame(const char *fps, const char *notice)\r
+{\r
+       if (notice || (currentConfig.EmuOpt & EOPT_SHOW_FPS)) {\r
+               if (notice)\r
+                       osd_text(4, 464, notice);\r
+               if (currentConfig.EmuOpt & EOPT_SHOW_FPS)\r
+                       osd_text(640, 464, fps);\r
        }\r
-       if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
+       if ((PicoAHW & PAHW_MCD) && (currentConfig.EmuOpt & EOPT_EN_CD_LEDS))\r
                draw_cd_leds();\r
-       if (PicoAHW & PAHW_PICO)\r
-               draw_pico_ptr();\r
-\r
-       //gp2x_video_wait_vsync();\r
-       // gp2x_video_flip();\r
 }\r
 \r
-\r
-// clears whole screen or just the notice area (in all buffers)\r
-static void clearArea(int full)\r
+void plat_video_toggle_renderer(int is_next, int force_16bpp, int is_menu)\r
 {\r
-       if (full) memset(g_screen_ptr, 0, g_screen_width*g_screen_height*2);\r
-       else      memset((short *)g_screen_ptr + g_screen_width * (g_screen_height - 16), 0,\r
-                       g_screen_width * 16 * 2);\r
+       // this will auto-select SMS/32X renderers\r
+       PicoDrawSetColorFormat(1);\r
 }\r
 \r
-\r
-static void vidResetMode(void)\r
+void plat_video_menu_enter(int is_rom_loaded)\r
 {\r
-#if 0\r
-       if (PicoOpt&0x10) {\r
-               gp2x_video_changemode(8);\r
-       } else if (currentConfig.EmuOpt&0x80) {\r
-               gp2x_video_changemode(16);\r
-#ifdef USE_320_SCREEN\r
-               PicoDrawSetColorFormat(1);\r
-               PicoScanBegin = EmuScanBegin16;\r
-#else\r
-               PicoDrawSetColorFormat(-1);\r
-               PicoScanEnd = EmuScanEnd16;\r
-#endif\r
-       } else {\r
-               gp2x_video_changemode(8);\r
-               PicoDrawSetColorFormat(2);\r
-               PicoScanBegin = EmuScanBegin8;\r
-       }\r
-       if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
-               // setup pal for 8-bit modes\r
-               localPal[0xc0] = 0x0000c000; // MCD LEDs\r
-               localPal[0xd0] = 0x00c00000;\r
-               localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
-               localPal[0xf0] = 0x00ffffff;\r
-               gp2x_video_setpalette(localPal, 0x100);\r
-               gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
-               gp2x_video_flip();\r
-       }\r
-       Pico.m.dirtyPal = 1;\r
-       // reset scaling\r
-       if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
-            gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
-       else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
-#else\r
-#ifdef USE_320_SCREEN\r
-       PicoDrawSetColorFormat(1);\r
-       PicoScanBegin = EmuScanBegin16;\r
-#else\r
-       PicoDrawSetColorFormat(-1);\r
-       PicoScanEnd = EmuScanEnd16;\r
-#endif\r
-#endif\r
 }\r
 \r
+void plat_video_menu_begin(void)\r
+{\r
+       memcpy32(g_screen_ptr, g_menubg_ptr, g_screen_width * g_screen_height * 2 / 4);\r
+}\r
 \r
-static void emu_msg_cb(const char *msg)\r
+void plat_video_menu_end(void)\r
 {\r
-/*\r
-       if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
-               // 8-bit renderers\r
-               gp2x_memset_all_buffers(g_screen_width*(g_screen_height-16), 0xe0, g_screen_width*16);\r
-               osd_text(4, g_screen_height-16, msg);\r
-               gp2x_memcpy_all_buffers((char *)g_screen_ptr+g_screen_width*(g_screen_height-16),\r
-                       g_screen_width*(g_screen_height-16), g_screen_width*16);\r
-       } else {\r
-               // 16bit accurate renderer\r
-               gp2x_memset_all_buffers(g_screen_width*(g_screen_height-16)*2, 0, g_screen_width*16*2);\r
-               osd_text(4, g_screen_height-16, msg);\r
-               gp2x_memcpy_all_buffers((char *)g_screen_ptr+g_screen_width*(g_screen_height-16)*2,\r
-                       g_screen_width*(g_screen_height-16)*2, g_screen_width*16*2);\r
-       }\r
-       gettimeofday(&noticeMsgTime, 0);\r
-       noticeMsgTime.tv_sec -= 2;\r
-*/\r
-       /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
-       reset_timing = 1;\r
+       plat_video_flip();\r
 }\r
 \r
-static void emu_state_cb(const char *str)\r
+void plat_status_msg_clear(void)\r
 {\r
-       clearArea(0);\r
-       blit("", str);\r
+       int s = g_screen_width * g_screen_height * 2;\r
+       int l = g_screen_width * 16 * 2;\r
+       int i;\r
+\r
+       for (i = 0; i < fbdev_buffer_count; i++)\r
+               memset32((int *)((char *)fbdev_buffers[i] + s - l), 0, l / 4);\r
 }\r
 \r
-static void emu_msg_tray_open(void)\r
+void plat_status_msg_busy_next(const char *msg)\r
 {\r
-       strcpy(noticeMsg, "CD tray opened");\r
-       gettimeofday(&noticeMsgTime, 0);\r
+       plat_status_msg_clear();\r
+       pemu_finalize_frame("", msg);\r
+       plat_video_flip();\r
+       emu_status_msg("");\r
+       reset_timing = 1;\r
 }\r
 \r
+void plat_status_msg_busy_first(const char *msg)\r
+{\r
+//     memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
+       plat_status_msg_busy_next(msg);\r
+}\r
 \r
-static void update_volume(int has_changed, int is_up)\r
+void plat_update_volume(int has_changed, int is_up)\r
 {\r
        static int prev_frame = 0, wait_frames = 0;\r
        int vol = currentConfig.volume;\r
 \r
        if (has_changed)\r
        {\r
-               if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
-                       wait_frames++;\r
-               else {\r
-                       if (is_up) {\r
-                               if (vol < 99) vol++;\r
-                       } else {\r
-                               if (vol >  0) vol--;\r
-                       }\r
-                       wait_frames = 0;\r
-                       sndout_oss_setvol(vol, vol);\r
-                       currentConfig.volume = vol;\r
+               if (is_up) {\r
+                       if (vol < 99) vol++;\r
+               } else {\r
+                       if (vol >  0) vol--;\r
                }\r
-               sprintf(noticeMsg, "VOL: %02i", vol);\r
-               gettimeofday(&noticeMsgTime, 0);\r
+               wait_frames = 0;\r
+               sndout_oss_setvol(vol, vol);\r
+               currentConfig.volume = vol;\r
+               emu_status_msg("VOL: %02i", vol);\r
                prev_frame = Pico.m.frame_count;\r
        }\r
-\r
-       // set the right mixer func\r
-       if (!(PicoOpt&8)) return; // just use defaults for mono\r
-       if (vol >= 5)\r
-               PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
-       else {\r
-               mix_32_to_16l_level = 5 - vol;\r
-               PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
-       }\r
 }\r
 \r
-\r
-static void updateSound(int len)\r
-{\r
-       if (PicoOpt&8) len<<=1;\r
-\r
-       /* avoid writing audio when lagging behind to prevent audio lag */\r
-       if (PicoSkipFrame != 2)\r
-               sndout_oss_write(PsndOut, len<<1);\r
-}\r
-\r
-\r
-static void SkipFrame(int do_audio)\r
-{\r
-       PicoSkipFrame=do_audio ? 1 : 2;\r
-       PicoFrame();\r
-       PicoSkipFrame=0;\r
-}\r
-\r
-\r
-void emu_forcedFrame(int opts)\r
+void pemu_forced_frame(int opts)\r
 {\r
        int po_old = PicoOpt;\r
        int eo_old = currentConfig.EmuOpt;\r
@@ -529,314 +257,172 @@ void emu_forcedFrame(int opts)
        PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
        currentConfig.EmuOpt |= 0x80;\r
 \r
-       //vidResetMode();\r
-#ifdef USE_320_SCREEN\r
-       PicoDrawSetColorFormat(1);\r
-       PicoScanBegin = EmuScanBegin16;\r
-#else\r
-       PicoDrawSetColorFormat(-1);\r
-       PicoScanEnd = EmuScanEnd16;\r
-#endif\r
        Pico.m.dirtyPal = 1;\r
        PicoFrameDrawOnly();\r
 \r
-/*\r
-       if (!(Pico.video.reg[12]&1)) {\r
-               vidCpyM2 = vidCpyM2_32col;\r
-               clearArea(1);\r
-       } else  vidCpyM2 = vidCpyM2_40col;\r
-\r
-       vidCpyM2((unsigned char *)g_screen_ptr+g_screen_width*8, PicoDraw2FB+328*8);\r
-       vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
-       gp2x_video_setpalette(localPal, 0x40);\r
-*/\r
        PicoOpt = po_old;\r
        currentConfig.EmuOpt = eo_old;\r
 }\r
 \r
-void emu_platformDebugCat(char *str)\r
+static void updateSound(int len)\r
 {\r
-       // nothing\r
-}\r
+       unsigned int t;\r
 \r
-static void simpleWait(int thissec, int lim_time)\r
-{\r
-       struct timeval tval;\r
+       len <<= 1;\r
+       if (PicoOpt & POPT_EN_STEREO)\r
+               len <<= 1;\r
 \r
-       spend_cycles(1024);\r
-       gettimeofday(&tval, 0);\r
-       if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
+       // sndout_oss_can_write() not reliable..\r
+       if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))\r
+               return;\r
 \r
-       while (tval.tv_usec < lim_time)\r
-       {\r
-               spend_cycles(1024);\r
-               gettimeofday(&tval, 0);\r
-               if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
-       }\r
+       /* avoid writing audio when lagging behind to prevent audio lag */\r
+       if (PicoSkipFrame == 2)\r
+               return;\r
+\r
+       t = plat_get_ticks_ms();\r
+       sndout_oss_write(PsndOut, len);\r
+       t = plat_get_ticks_ms() - t;\r
+       if (t > 1)\r
+               printf("audio lag %u\n", t);\r
 }\r
 \r
-void emu_startSound(void)\r
+void pemu_sound_start(void)\r
 {\r
-       static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
        int target_fps = Pico.m.pal ? 50 : 60;\r
 \r
        PsndOut = NULL;\r
 \r
-       if (currentConfig.EmuOpt & 4)\r
+       if (currentConfig.EmuOpt & EOPT_EN_SOUND)\r
        {\r
-               int snd_excess_add;\r
-               if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old)\r
-                       PsndRerate(Pico.m.frame_count ? 1 : 0);\r
+               int snd_excess_add, frame_samples;\r
+               int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;\r
+\r
+               PsndRerate(Pico.m.frame_count ? 1 : 0);\r
+\r
+               frame_samples = PsndLen;\r
+               snd_excess_add = ((PsndRate - PsndLen * target_fps)<<16) / target_fps;\r
+               if (snd_excess_add != 0)\r
+                       frame_samples++;\r
 \r
-               snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
                printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
-                       PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
-               sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
-               sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
+                       PsndRate, PsndLen, snd_excess_add, is_stereo, Pico.m.pal);\r
+               sndout_oss_start(PsndRate, frame_samples * 2, is_stereo);\r
+               //sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
                PicoWriteSound = updateSound;\r
-               update_volume(0, 0);\r
+               plat_update_volume(0, 0);\r
                memset(sndBuffer, 0, sizeof(sndBuffer));\r
                PsndOut = sndBuffer;\r
-               PsndRate_old = PsndRate;\r
-               PicoOpt_old  = PicoOpt;\r
-               pal_old = Pico.m.pal;\r
        }\r
 }\r
 \r
-void emu_endSound(void)\r
+void pemu_sound_stop(void)\r
 {\r
+       sndout_oss_stop();\r
 }\r
 \r
-/* wait until we can write more sound */\r
-void emu_waitSound(void)\r
+void pemu_sound_wait(void)\r
 {\r
        // don't need to do anything, writes will block by themselves\r
 }\r
 \r
-void emu_Loop(void)\r
+void plat_debug_cat(char *str)\r
 {\r
-       char fpsbuff[24]; // fps count c string\r
-       struct timeval tval; // timing\r
-       int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
-       int  frames_done,  frames_shown,  thissec; // actual frames\r
-       int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
-       char *notice = 0;\r
-\r
-       printf("entered emu_Loop()\n");\r
-\r
-       fpsbuff[0] = 0;\r
-\r
-       // make sure we are in correct mode\r
-       vidResetMode();\r
-       Pico.m.dirtyPal = 1;\r
-       oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
-\r
-       // pal/ntsc might have changed, reset related stuff\r
-       target_fps = Pico.m.pal ? 50 : 60;\r
-       target_frametime = 1000000/target_fps;\r
-       reset_timing = 1;\r
-\r
-       emu_startSound();\r
-\r
-       // prepare CD buffer\r
-       if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
-\r
-       // calc vsync offset to sync timing code with vsync\r
-       if (currentConfig.EmuOpt&0x2000) {\r
-               gettimeofday(&tval, 0);\r
-               //gp2x_video_wait_vsync();\r
-               gettimeofday(&tval, 0);\r
-               vsync_offset = tval.tv_usec;\r
-               while (vsync_offset >= target_frametime)\r
-                       vsync_offset -= target_frametime;\r
-               if (!vsync_offset) vsync_offset++;\r
-               printf("vsync_offset: %i\n", vsync_offset);\r
-       } else\r
-               vsync_offset = 0;\r
-\r
-       frames_done = frames_shown = thissec =\r
-       pframes_done = pframes_shown = pthissec = 0;\r
-\r
-       // loop\r
-       while (engineState == PGS_Running)\r
-       {\r
-               int modes;\r
-\r
-               gettimeofday(&tval, 0);\r
-               if (reset_timing) {\r
-                       reset_timing = 0;\r
-                       pthissec = tval.tv_sec;\r
-                       pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
-               }\r
+}\r
 \r
-               // show notice message?\r
-               if (noticeMsgTime.tv_sec)\r
-               {\r
-                       static int noticeMsgSum;\r
-                       if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
-                               noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
-                               clearArea(0);\r
-                               notice = 0;\r
-                       } else {\r
-                               int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
-                               if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
-                               notice = noticeMsg;\r
-                       }\r
-               }\r
+void emu_video_mode_change(int start_line, int line_count, int is_32cols)\r
+{\r
+       int i;\r
 \r
-               // check for mode changes\r
-               modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
-               if (modes != oldmodes)\r
-               {\r
-                       int scalex = g_screen_width;\r
-                       osd_fps_x = OSD_FPS_X;\r
-                       if (modes & 4) {\r
-                               vidCpyM2 = vidCpyM2_40col;\r
-                       } else {\r
-                               if (PicoOpt & 0x100) {\r
-                                       vidCpyM2 = vidCpyM2_32col_nobord;\r
-                                       scalex = 256;\r
-                                       osd_fps_x = OSD_FPS_X - 64;\r
-                               } else {\r
-                                       vidCpyM2 = vidCpyM2_32col;\r
-                               }\r
-                       }\r
-                       //if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
-                       //      gp2x_video_RGB_setscaling(8, scalex, 224);\r
-                       // else gp2x_video_RGB_setscaling(0, scalex, 240);\r
-                       oldmodes = modes;\r
-                       clearArea(1);\r
-               }\r
+       // clear whole screen in all buffers\r
+       for (i = 0; i < fbdev_buffer_count; i++)\r
+               memset32(fbdev_buffers[i], 0, g_screen_width * g_screen_height * 2 / 4);\r
 \r
-               // second changed?\r
-               if (thissec != tval.tv_sec)\r
-               {\r
-#ifdef BENCHMARK\r
-                       static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
-                       if (++bench == 4) {\r
-                               bench = 0;\r
-                               bench_fps_s = bench_fps / 4;\r
-                               bf[bfp++ & 3] = bench_fps / 4;\r
-                               bench_fps = 0;\r
-                       }\r
-                       bench_fps += frames_shown;\r
-                       sprintf(fpsbuff, "%3i/%3i/%3i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
-                       printf("%s\n", fpsbuff);\r
+#ifdef USE_320_SCREEN\r
+       PicoDrawSetColorFormat(1);\r
+       PicoScanBegin = EmuScanBegin16;\r
 #else\r
-                       if (currentConfig.EmuOpt & 2) {\r
-                               sprintf(fpsbuff, "%3i/%3i", frames_shown, frames_done);\r
-                               if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
-                       }\r
-#endif\r
-                       frames_shown = frames_done = 0;\r
-                       thissec = tval.tv_sec;\r
-               }\r
-#ifdef PFRAMES\r
-               sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
+       if (PicoAHW & PAHW_32X) {\r
+               DrawLineDest = (unsigned short *)temp_frame;\r
+               PicoDrawSetColorFormat(1);\r
+               PicoScanBegin = NULL;\r
+               PicoScanEnd = EmuScanEnd16_32x;\r
+       } else {\r
+               PicoDrawSetColorFormat(-1);\r
+               PicoScanBegin = NULL;\r
+               PicoScanEnd = EmuScanEnd16;\r
+       }\r
 #endif\r
+}\r
 \r
-               if (pthissec != tval.tv_sec)\r
-               {\r
-                       if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
-                               pframes_done = pframes_shown = 0;\r
-                       } else {\r
-                               // it is quite common for this implementation to leave 1 fame unfinished\r
-                               // when second changes, but we don't want buffer to starve.\r
-                               if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
-                                       emu_update_input();\r
-                                       SkipFrame(1); pframes_done++;\r
-                               }\r
-\r
-                               pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
-                               pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
-                               if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
-                       }\r
-                       pthissec = tval.tv_sec;\r
-               }\r
-\r
-               lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
-               if (currentConfig.Frameskip >= 0) // frameskip enabled\r
-               {\r
-                       for(i = 0; i < currentConfig.Frameskip; i++) {\r
-                               emu_update_input();\r
-                               SkipFrame(1); pframes_done++; frames_done++;\r
-                               if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
-                                       gettimeofday(&tval, 0);\r
-                                       if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
-                                       if (tval.tv_usec < lim_time) { // we are too fast\r
-                                               simpleWait(pthissec, lim_time);\r
-                                       }\r
-                               }\r
-                               lim_time += target_frametime;\r
-                       }\r
-               }\r
-               else if (tval.tv_usec > lim_time) // auto frameskip\r
-               {\r
-                       // no time left for this frame - skip\r
-                       if (tval.tv_usec - lim_time >= 300000) {\r
-                               /* something caused a slowdown for us (disk access? cache flush?)\r
-                                * try to recover by resetting timing... */\r
-                               reset_timing = 1;\r
-                               continue;\r
-                       }\r
-                       emu_update_input();\r
-                       SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
-                       continue;\r
-               }\r
-\r
-               emu_update_input();\r
-               PicoFrame();\r
+void pemu_loop_prep(void)\r
+{\r
+       emu_video_mode_change(0, 0, 0);\r
+       pemu_sound_start();\r
+}\r
 \r
-               // check time\r
-               gettimeofday(&tval, 0);\r
-               if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
+void pemu_loop_end(void)\r
+{\r
+       int po_old = PicoOpt;\r
+       int eo_old = currentConfig.EmuOpt;\r
 \r
-               if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
-                       reset_timing = 1;\r
-#if 1\r
-               else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
-               {\r
-                       // sleep or vsync if we are still too fast\r
-                       // usleep sleeps for ~20ms minimum, so it is not a solution here\r
-                       if (!reset_timing && tval.tv_usec < lim_time)\r
-                       {\r
-                               // we are too fast\r
-                               if (vsync_offset) {\r
-                                       if (lim_time - tval.tv_usec > target_frametime/2)\r
-                                               simpleWait(pthissec, lim_time - target_frametime/4);\r
-                                       // gp2x_video_wait_vsync();\r
-                               } else {\r
-                                       simpleWait(pthissec, lim_time);\r
-                               }\r
-                       }\r
-               }\r
-#endif\r
-               blit(fpsbuff, notice);\r
+       pemu_sound_stop();\r
+       memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
 \r
-               pframes_done++; pframes_shown++;\r
-                frames_done++;  frames_shown++;\r
-       }\r
+       /* do one more frame for menu bg */\r
+       PicoOpt &= ~POPT_ALT_RENDERER;\r
+       PicoOpt |= POPT_EN_SOFTSCALE|POPT_ACC_SPRITES;\r
+       currentConfig.EmuOpt |= EOPT_16BPP;\r
 \r
-       emu_changeFastForward(0);\r
+       PicoDrawSetColorFormat(1);\r
+       Pico.m.dirtyPal = 1;\r
+       PicoFrame();\r
 \r
-       if (PicoAHW & PAHW_MCD) PicoCDBufferFree();\r
+       PicoOpt = po_old;\r
+       currentConfig.EmuOpt = eo_old;\r
+}\r
 \r
-       // save SRAM\r
-       if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
-               emu_state_cb("Writing SRAM/BRAM..");\r
-               emu_SaveLoadGame(0, 1);\r
-               SRam.changed = 0;\r
+void plat_wait_till_us(unsigned int us_to)\r
+{\r
+       unsigned int now;\r
+       signed int diff;\r
+\r
+       now = plat_get_ticks_us();\r
+\r
+       // XXX: need to check NOHZ and djw kernel\r
+       diff = (signed int)(us_to - now);\r
+       if (diff > 10000) {\r
+               //printf("sleep %d\n", us_to - now);\r
+               usleep(diff * 15 / 16);\r
+               now = plat_get_ticks_us();\r
+               //printf(" wake %d\n", (signed)(us_to - now));\r
        }\r
-\r
-       // if in 8bit mode, generate 16bit image for menu background\r
-       if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
-               emu_forcedFrame(POPT_EN_SOFTSCALE);\r
+/*\r
+       while ((signed int)(us_to - now) > 512) {\r
+               spend_cycles(1024);\r
+               now = plat_get_ticks_us();\r
+       }\r
+*/\r
 }\r
 \r
-\r
-void emu_ResetGame(void)\r
+const char *plat_get_credits(void)\r
 {\r
-       PicoReset();\r
-       reset_timing = 1;\r
+       return "PicoDrive v" VERSION " (c) notaz, 2006-2009\n\n\n"\r
+               "Credits:\n"\r
+               "fDave: Cyclone 68000 core,\n"\r
+               "      base code of PicoDrive\n"\r
+               "Reesy & FluBBa: DrZ80 core\n"\r
+               "MAME devs: YM2612 and SN76496 cores\n"\r
+               "rlyeh and others: minimal SDK\n"\r
+               "Squidge: mmuhack\n"\r
+               "Dzz: ARM940 sample\n"\r
+               "GnoStiC / Puck2099: USB joy code\n"\r
+               "craigix: GP2X hardware\n"\r
+               "ketchupgun: skin design\n"\r
+               "\n"\r
+               "special thanks (for docs, ideas):\n"\r
+               " Charles MacDonald, Haze,\n"\r
+               " Stephane Dallongeville,\n"\r
+               " Lordus, Exophase, Rokas,\n"\r
+               " Nemesis, Tasco Deluxe";\r
 }\r
-\r