[picodrive.git] / platform / pandora / emu.c

// (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
\r
#include "../common/emu.h"\r
#include "../common/menu.h"\r
#include "../common/plat.h"\r
#include "../common/arm_utils.h"\r
#include "../linux/sndout_oss.h"\r
#include "asm_utils.h"\r
#include "version.h"\r
\r
#include <pico/pico_int.h>\r
\r
#define USE_320_SCREEN 1\r
\r
\r
static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
static unsigned char temp_frame[g_screen_width * g_screen_height * 2];\r
unsigned char *PicoDraw2FB = temp_frame;\r
static int osd_fps_x;\r
char cpu_clk_name[] = "unused";\r
\r
\r
void pemu_prep_defconfig(void)\r
{\r
	// XXX: move elsewhere\r
	g_menubg_ptr = temp_frame;\r
}\r
\r
void pemu_validate_config(void)\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
\r
	if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
		int *p, i, h;\r
		x &= ~3; // align x\r
		len = (len+3) >> 2;\r
		for (h = 0; h < 8; h++) {\r
			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_text_out8(x, y, text);\r
	} else {\r
		int *p, i, h;\r
		x &= ~1; // align x\r
		len++;\r
		for (h = 0; h < 16; h++) {\r
			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
		text_out16(x, y, text);\r
	}\r
}\r
\r
static void draw_cd_leds(void)\r
{\r
//	static\r
	int old_reg;\r
//	if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
	old_reg = Pico_mcd->s68k_regs[0];\r
\r
	if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
		// 8-bit modes\r
		unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
		unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
		*(unsigned int *)((char *)g_screen_ptr + g_screen_width*2+ 4) =\r
		*(unsigned int *)((char *)g_screen_ptr + g_screen_width*3+ 4) =\r
		*(unsigned int *)((char *)g_screen_ptr + g_screen_width*4+ 4) = col_g;\r
		*(unsigned int *)((char *)g_screen_ptr + g_screen_width*2+12) =\r
		*(unsigned int *)((char *)g_screen_ptr + g_screen_width*3+12) =\r
		*(unsigned int *)((char *)g_screen_ptr + g_screen_width*4+12) = col_r;\r
	} else {\r
		// 16-bit modes\r
		unsigned int *p = (unsigned int *)((short *)g_screen_ptr + g_screen_width*2+4);\r
		unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
		unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
		*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += g_screen_width/2 - 12/2;\r
		*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += g_screen_width/2 - 12/2;\r
		*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
	}\r
}\r
\r
#ifdef USE_320_SCREEN\r
\r
static int EmuScanBegin16(unsigned int num)\r
{\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
\r
	return 0;\r
}\r
\r
#else // USE_320_SCREEN\r
\r
static int EmuScanEnd16(unsigned int num)\r
{\r
	unsigned char  *ps=HighCol+8;\r
	unsigned short *pd;\r
	unsigned short *pal=HighPal;\r
	int sh = Pico.video.reg[0xC]&8;\r
	int len, mask = 0xff;\r
\r
	pd=(unsigned short *)g_screen_ptr + num*800*2 + 800/2 - 320*2/2;\r
\r
	if (Pico.m.dirtyPal)\r
		PicoDoHighPal555(sh);\r
\r
	if (Pico.video.reg[12]&1) {\r
		len = 320;\r
	} else {\r
		pd += 32*2;\r
		len = 256;\r
	}\r
\r
	if (!sh && (rendstatus & PDRAW_SPR_LO_ON_HI))\r
		mask=0x3f; // messed sprites, upper bits are priority stuff\r
\r
#if 1\r
	clut_line(pd, ps, pal, (mask<<16) | len);\r
#else\r
	for (; len > 0; len--)\r
	{\r
		unsigned int p = pal[*ps++ & mask];\r
		p |= p << 16;\r
		*(unsigned int *)pd = p;\r
		*(unsigned int *)(&pd[800]) = p;\r
		pd += 2;\r
	}\r
#endif\r
\r
	return 0;\r
}\r
\r
#endif // USE_320_SCREEN\r
\r
void pemu_update_display(const char *fps, const char *notice)\r
{\r
	if (notice || (currentConfig.EmuOpt & EOPT_SHOW_FPS)) {\r
		if (notice)\r
			osd_text(4, 460, notice);\r
		if (currentConfig.EmuOpt & EOPT_SHOW_FPS)\r
			osd_text(osd_fps_x, 460, fps);\r
	}\r
	if ((PicoAHW & PAHW_MCD) && (currentConfig.EmuOpt & EOPT_EN_CD_LEDS))\r
		draw_cd_leds();\r
}\r
\r
void plat_video_toggle_renderer(int is_next, int force_16bpp, int is_menu)\r
{\r
	// this will auto-select SMS/32X renderers\r
	PicoDrawSetColorFormat(1);\r
}\r
\r
void plat_video_menu_enter(int is_rom_loaded)\r
{\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
void plat_video_menu_end(void)\r
{\r
}\r
\r
void plat_status_msg_clear(void)\r
{\r
	unsigned short *d = (unsigned short *)g_screen_ptr + g_screen_width * g_screen_height;\r
	int l = g_screen_width * 8;\r
	memset32((int *)(d - l), 0, l * 2 / 4);\r
}\r
\r
void plat_status_msg_busy_next(const char *msg)\r
{\r
	plat_status_msg_clear();\r
	pemu_update_display("", msg);\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
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 (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
		emu_status_msg("VOL: %02i", vol);\r
		prev_frame = Pico.m.frame_count;\r
	}\r
}\r
\r
void pemu_forced_frame(int opts)\r
{\r
	int po_old = PicoOpt;\r
	int eo_old = currentConfig.EmuOpt;\r
\r
	PicoOpt &= ~0x10;\r
	PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
	currentConfig.EmuOpt |= 0x80;\r
\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
	PicoOpt = po_old;\r
	currentConfig.EmuOpt = eo_old;\r
}\r
\r
static void updateSound(int len)\r
{\r
	len <<= 1;\r
	if (PicoOpt & POPT_EN_STEREO)\r
		len <<= 1;\r
\r
	if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))\r
		return;\r
\r
	/* avoid writing audio when lagging behind to prevent audio lag */\r
	if (PicoSkipFrame != 2)\r
		sndout_oss_write(PsndOut, len);\r
}\r
\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
	{\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
\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
		PicoWriteSound = updateSound;\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 pemu_sound_stop(void)\r
{\r
}\r
\r
void pemu_sound_wait(void)\r
{\r
	// don't need to do anything, writes will block by themselves\r
}\r
\r
void plat_debug_cat(char *str)\r
{\r
}\r
\r
void emu_video_mode_change(int start_line, int line_count, int is_32cols)\r
{\r
	osd_fps_x = 260;\r
\r
	// clear whole screen in all buffers\r
	memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
}\r
\r
void pemu_loop_prep(void)\r
{\r
#ifdef USE_320_SCREEN\r
	PicoDrawSetColorFormat(1);\r
	PicoScanBegin = EmuScanBegin16;\r
#else\r
	PicoDrawSetColorFormat(-1);\r
	PicoScanEnd = EmuScanEnd16;\r
#endif\r
\r
	pemu_sound_start();\r
}\r
\r
void pemu_loop_end(void)\r
{\r
	int po_old = PicoOpt;\r
	int eo_old = currentConfig.EmuOpt;\r
\r
	pemu_sound_stop();\r
	memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\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
	PicoDrawSetColorFormat(1);\r
	Pico.m.dirtyPal = 1;\r
	PicoFrame();\r
\r
	PicoOpt = po_old;\r
	currentConfig.EmuOpt = eo_old;\r
}\r
\r
/* XXX: avoid busy wait somehow? */\r
void plat_wait_till_us(unsigned int us_to)\r
{\r
	unsigned int now;\r
\r
	spend_cycles(1024);\r
	now = plat_get_ticks_us();\r
\r
	while ((signed int)(us_to - now) > 512)\r
	{\r
		spend_cycles(1024);\r
		now = plat_get_ticks_us();\r
	}\r
}\r
\r
void plat_video_wait_vsync(void)\r
{\r
}\r
\r
const char *plat_get_credits(void)\r
{\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
Commit	Line	Data
f2cf8472	1	// (c) Copyright 2006-2009 notaz, All rights reserved.\r
e55f0cbb	2	// Free for non-commercial use.\r
	3	\r
	4	// For commercial use, separate licencing terms must be obtained.\r
	5	\r
	6	#include <stdio.h>\r
e55f0cbb	7	\r
e55f0cbb	8	#include "../common/emu.h"\r
74f5e726	9	#include "../common/menu.h"\r
697746df	10	#include "../common/plat.h"\r
697746df	11	#include "../common/arm_utils.h"\r
e5ab6faf	12	#include "../linux/sndout_oss.h"\r
3bb7bd19	13	#include "asm_utils.h"\r
697746df	14	#include "version.h"\r
e55f0cbb	15	\r
efcba75f	16	#include <pico/pico_int.h>\r
e55f0cbb	17	\r
697746df	18	#define USE_320_SCREEN 1\r
e55f0cbb	19	\r
e55f0cbb	20	\r
e55f0cbb	21	static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
697746df	22	static unsigned char temp_frame[g_screen_width * g_screen_height * 2];\r
697746df	23	unsigned char *PicoDraw2FB = temp_frame;\r
e55f0cbb	24	static int osd_fps_x;\r
697746df	25	char cpu_clk_name[] = "unused";\r
e55f0cbb	26	\r
e55f0cbb	27	\r
f2cf8472	28	void pemu_prep_defconfig(void)\r
e55f0cbb	29	{\r
697746df	30	// XXX: move elsewhere\r
697746df	31	g_menubg_ptr = temp_frame;\r
e55f0cbb	32	}\r
e55f0cbb	33	\r
697746df	34	void pemu_validate_config(void)\r
e55f0cbb	35	{\r
e55f0cbb	36	}\r
e55f0cbb	37	\r
697746df	38	// FIXME: cleanup\r
bcd94522	39	static void osd_text(int x, int y, const char *text)\r
e55f0cbb	40	{\r
	41	int len = strlen(text)*8;\r
	42	\r
	43	if ((PicoOpt&0x10)\|\|!(currentConfig.EmuOpt&0x80)) {\r
	44	int *p, i, h;\r
	45	x &= ~3; // align x\r
	46	len = (len+3) >> 2;\r
	47	for (h = 0; h < 8; h++) {\r
74f5e726	48	p = (int ) ((unsigned char ) g_screen_ptr+x+g_screen_width*(y+h));\r
e55f0cbb	49	for (i = len; i; i--, p++) *p = 0xe0e0e0e0;\r
e55f0cbb	50	}\r
cc41eb4f	51	emu_text_out8(x, y, text);\r
e55f0cbb	52	} else {\r
	53	int *p, i, h;\r
	54	x &= ~1; // align x\r
	55	len++;\r
	56	for (h = 0; h < 16; h++) {\r
74f5e726	57	p = (int ) ((unsigned short ) g_screen_ptr+x+g_screen_width*(y+h));\r
3bb7bd19	58	for (i = len; i; i--, p++) p = 0;//(p>>2)&0x39e7;\r
e55f0cbb	59	}\r
cc41eb4f	60	text_out16(x, y, text);\r
e55f0cbb	61	}\r
	62	}\r
	63	\r
	64	static void draw_cd_leds(void)\r
	65	{\r
	66	// static\r
	67	int old_reg;\r
	68	// if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
	69	old_reg = Pico_mcd->s68k_regs[0];\r
	70	\r
	71	if ((PicoOpt&0x10)\|\|!(currentConfig.EmuOpt&0x80)) {\r
	72	// 8-bit modes\r
	73	unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
	74	unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
74f5e726	75	(unsigned int )((char )g_screen_ptr + g_screen_width2+ 4) =\r
	76	(unsigned int )((char )g_screen_ptr + g_screen_width3+ 4) =\r
	77	(unsigned int )((char )g_screen_ptr + g_screen_width4+ 4) = col_g;\r
	78	(unsigned int )((char )g_screen_ptr + g_screen_width2+12) =\r
	79	(unsigned int )((char )g_screen_ptr + g_screen_width3+12) =\r
	80	(unsigned int )((char )g_screen_ptr + g_screen_width4+12) = col_r;\r
e55f0cbb	81	} else {\r
e55f0cbb	82	// 16-bit modes\r
74f5e726	83	unsigned int p = (unsigned int )((short )g_screen_ptr + g_screen_width2+4);\r
e55f0cbb	84	unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
e55f0cbb	85	unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
e2de9939	86	p++ = col_g; p++ = col_g; p+=2; p++ = col_r; p++ = col_r; p += g_screen_width/2 - 12/2;\r
e2de9939	87	p++ = col_g; p++ = col_g; p+=2; p++ = col_r; p++ = col_r; p += g_screen_width/2 - 12/2;\r
e55f0cbb	88	p++ = col_g; p++ = col_g; p+=2; p++ = col_r; p++ = col_r;\r
	89	}\r
	90	}\r
	91	\r
3bb7bd19	92	#ifdef USE_320_SCREEN\r
	93	\r
	94	static int EmuScanBegin16(unsigned int num)\r
	95	{\r
74f5e726	96	DrawLineDest = (unsigned short )g_screen_ptr + num800 + 800/2 - 320/2;\r
3bb7bd19	97	//int w = (Pico.video.reg[12]&1) ? 320 : 256;\r
74f5e726	98	//DrawLineDest = (unsigned short )g_screen_ptr + numw;\r
3bb7bd19	99	\r
	100	return 0;\r
	101	}\r
	102	\r
	103	#else // USE_320_SCREEN\r
	104	\r
e55f0cbb	105	static int EmuScanEnd16(unsigned int num)\r
	106	{\r
	107	unsigned char *ps=HighCol+8;\r
	108	unsigned short *pd;\r
	109	unsigned short *pal=HighPal;\r
	110	int sh = Pico.video.reg[0xC]&8;\r
	111	int len, mask = 0xff;\r
	112	\r
74f5e726	113	pd=(unsigned short )g_screen_ptr + num8002 + 800/2 - 3202/2;\r
e55f0cbb	114	\r
	115	if (Pico.m.dirtyPal)\r
	116	PicoDoHighPal555(sh);\r
	117	\r
	118	if (Pico.video.reg[12]&1) {\r
	119	len = 320;\r
	120	} else {\r
3bb7bd19	121	pd += 32*2;\r
e55f0cbb	122	len = 256;\r
	123	}\r
	124	\r
efcba75f	125	if (!sh && (rendstatus & PDRAW_SPR_LO_ON_HI))\r
efcba75f	126	mask=0x3f; // messed sprites, upper bits are priority stuff\r
e55f0cbb	127	\r
3bb7bd19	128	#if 1\r
	129	clut_line(pd, ps, pal, (mask<<16) \| len);\r
	130	#else\r
e55f0cbb	131	for (; len > 0; len--)\r
	132	{\r
	133	unsigned int p = pal[*ps++ & mask];\r
	134	p \|= p << 16;\r
	135	(unsigned int )pd = p;\r
	136	(unsigned int )(&pd[800]) = p;\r
	137	pd += 2;\r
	138	}\r
3bb7bd19	139	#endif\r
e55f0cbb	140	\r
	141	return 0;\r
	142	}\r
	143	\r
3bb7bd19	144	#endif // USE_320_SCREEN\r
3bb7bd19	145	\r
697746df	146	void pemu_update_display(const char fps, const char notice)\r
e55f0cbb	147	{\r
697746df	148	if (notice \|\| (currentConfig.EmuOpt & EOPT_SHOW_FPS)) {\r
	149	if (notice)\r
	150	osd_text(4, 460, notice);\r
	151	if (currentConfig.EmuOpt & EOPT_SHOW_FPS)\r
	152	osd_text(osd_fps_x, 460, fps);\r
e55f0cbb	153	}\r
697746df	154	if ((PicoAHW & PAHW_MCD) && (currentConfig.EmuOpt & EOPT_EN_CD_LEDS))\r
e55f0cbb	155	draw_cd_leds();\r
697746df	156	}\r
e55f0cbb	157	\r
697746df	158	void plat_video_toggle_renderer(int is_next, int force_16bpp, int is_menu)\r
	159	{\r
	160	// this will auto-select SMS/32X renderers\r
	161	PicoDrawSetColorFormat(1);\r
e55f0cbb	162	}\r
e55f0cbb	163	\r
697746df	164	void plat_video_menu_enter(int is_rom_loaded)\r
	165	{\r
	166	}\r
e55f0cbb	167	\r
697746df	168	void plat_video_menu_begin(void)\r
e55f0cbb	169	{\r
697746df	170	memcpy32(g_screen_ptr, g_menubg_ptr, g_screen_width * g_screen_height * 2 / 4);\r
e55f0cbb	171	}\r
e55f0cbb	172	\r
697746df	173	void plat_video_menu_end(void)\r
	174	{\r
	175	}\r
e55f0cbb	176	\r
697746df	177	void plat_status_msg_clear(void)\r
e55f0cbb	178	{\r
697746df	179	unsigned short d = (unsigned short )g_screen_ptr + g_screen_width * g_screen_height;\r
	180	int l = g_screen_width * 8;\r
	181	memset32((int )(d - l), 0, l 2 / 4);\r
e55f0cbb	182	}\r
e55f0cbb	183	\r
697746df	184	void plat_status_msg_busy_next(const char *msg)\r
	185	{\r
	186	plat_status_msg_clear();\r
	187	pemu_update_display("", msg);\r
	188	emu_status_msg("");\r
	189	reset_timing = 1;\r
	190	}\r
e55f0cbb	191	\r
697746df	192	void plat_status_msg_busy_first(const char *msg)\r
	193	{\r
	194	// memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
	195	plat_status_msg_busy_next(msg);\r
	196	}\r
	197	\r
	198	void plat_update_volume(int has_changed, int is_up)\r
e55f0cbb	199	{\r
	200	static int prev_frame = 0, wait_frames = 0;\r
	201	int vol = currentConfig.volume;\r
	202	\r
	203	if (has_changed)\r
	204	{\r
697746df	205	if (is_up) {\r
	206	if (vol < 99) vol++;\r
	207	} else {\r
	208	if (vol > 0) vol--;\r
e55f0cbb	209	}\r
697746df	210	wait_frames = 0;\r
	211	sndout_oss_setvol(vol, vol);\r
	212	currentConfig.volume = vol;\r
	213	emu_status_msg("VOL: %02i", vol);\r
e55f0cbb	214	prev_frame = Pico.m.frame_count;\r
e55f0cbb	215	}\r
e55f0cbb	216	}\r
e55f0cbb	217	\r
f2cf8472	218	void pemu_forced_frame(int opts)\r
e55f0cbb	219	{\r
	220	int po_old = PicoOpt;\r
	221	int eo_old = currentConfig.EmuOpt;\r
	222	\r
	223	PicoOpt &= ~0x10;\r
	224	PicoOpt \|= opts\|POPT_ACC_SPRITES; // acc_sprites\r
	225	currentConfig.EmuOpt \|= 0x80;\r
	226	\r
3bb7bd19	227	#ifdef USE_320_SCREEN\r
	228	PicoDrawSetColorFormat(1);\r
	229	PicoScanBegin = EmuScanBegin16;\r
	230	#else\r
e55f0cbb	231	PicoDrawSetColorFormat(-1);\r
e55f0cbb	232	PicoScanEnd = EmuScanEnd16;\r
3bb7bd19	233	#endif\r
e55f0cbb	234	Pico.m.dirtyPal = 1;\r
	235	PicoFrameDrawOnly();\r
	236	\r
e55f0cbb	237	PicoOpt = po_old;\r
	238	currentConfig.EmuOpt = eo_old;\r
	239	}\r
	240	\r
697746df	241	static void updateSound(int len)\r
e55f0cbb	242	{\r
697746df	243	len <<= 1;\r
	244	if (PicoOpt & POPT_EN_STEREO)\r
	245	len <<= 1;\r
e55f0cbb	246	\r
697746df	247	if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))\r
697746df	248	return;\r
e55f0cbb	249	\r
697746df	250	/* avoid writing audio when lagging behind to prevent audio lag */\r
	251	if (PicoSkipFrame != 2)\r
	252	sndout_oss_write(PsndOut, len);\r
e55f0cbb	253	}\r
e55f0cbb	254	\r
f2cf8472	255	void pemu_sound_start(void)\r
b6820926	256	{\r
	257	static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
	258	int target_fps = Pico.m.pal ? 50 : 60;\r
	259	\r
	260	PsndOut = NULL;\r
	261	\r
	262	if (currentConfig.EmuOpt & 4)\r
	263	{\r
	264	int snd_excess_add;\r
	265	if (PsndRate != PsndRate_old \|\| (PicoOpt&0x20b) != (PicoOpt_old&0x20b) \|\| Pico.m.pal != pal_old)\r
	266	PsndRerate(Pico.m.frame_count ? 1 : 0);\r
	267	\r
	268	snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
	269	printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
	270	PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
	271	sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
	272	sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
	273	PicoWriteSound = updateSound;\r
697746df	274	plat_update_volume(0, 0);\r
b6820926	275	memset(sndBuffer, 0, sizeof(sndBuffer));\r
	276	PsndOut = sndBuffer;\r
	277	PsndRate_old = PsndRate;\r
	278	PicoOpt_old = PicoOpt;\r
	279	pal_old = Pico.m.pal;\r
	280	}\r
	281	}\r
	282	\r
f2cf8472	283	void pemu_sound_stop(void)\r
b6820926	284	{\r
	285	}\r
	286	\r
f2cf8472	287	void pemu_sound_wait(void)\r
b6820926	288	{\r
	289	// don't need to do anything, writes will block by themselves\r
	290	}\r
e55f0cbb	291	\r
697746df	292	void plat_debug_cat(char *str)\r
e55f0cbb	293	{\r
697746df	294	}\r
e55f0cbb	295	\r
697746df	296	void emu_video_mode_change(int start_line, int line_count, int is_32cols)\r
	297	{\r
	298	osd_fps_x = 260;\r
e55f0cbb	299	\r
697746df	300	// clear whole screen in all buffers\r
	301	memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
	302	}\r
e55f0cbb	303	\r
697746df	304	void pemu_loop_prep(void)\r
	305	{\r
	306	#ifdef USE_320_SCREEN\r
	307	PicoDrawSetColorFormat(1);\r
	308	PicoScanBegin = EmuScanBegin16;\r
e55f0cbb	309	#else\r
697746df	310	PicoDrawSetColorFormat(-1);\r
697746df	311	PicoScanEnd = EmuScanEnd16;\r
e55f0cbb	312	#endif\r
e55f0cbb	313	\r
697746df	314	pemu_sound_start();\r
697746df	315	}\r
e55f0cbb	316	\r
697746df	317	void pemu_loop_end(void)\r
	318	{\r
	319	int po_old = PicoOpt;\r
	320	int eo_old = currentConfig.EmuOpt;\r
e55f0cbb	321	\r
697746df	322	pemu_sound_stop();\r
697746df	323	memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
e55f0cbb	324	\r
697746df	325	/* do one more frame for menu bg */\r
	326	PicoOpt &= ~POPT_ALT_RENDERER;\r
	327	PicoOpt \|= POPT_EN_SOFTSCALE\|POPT_ACC_SPRITES;\r
	328	currentConfig.EmuOpt \|= EOPT_16BPP;\r
e55f0cbb	329	\r
697746df	330	PicoDrawSetColorFormat(1);\r
	331	Pico.m.dirtyPal = 1;\r
	332	PicoFrame();\r
e55f0cbb	333	\r
697746df	334	PicoOpt = po_old;\r
	335	currentConfig.EmuOpt = eo_old;\r
	336	}\r
e55f0cbb	337	\r
697746df	338	/* XXX: avoid busy wait somehow? */\r
	339	void plat_wait_till_us(unsigned int us_to)\r
	340	{\r
	341	unsigned int now;\r
e55f0cbb	342	\r
697746df	343	spend_cycles(1024);\r
697746df	344	now = plat_get_ticks_us();\r
e55f0cbb	345	\r
697746df	346	while ((signed int)(us_to - now) > 512)\r
	347	{\r
	348	spend_cycles(1024);\r
	349	now = plat_get_ticks_us();\r
e55f0cbb	350	}\r
697746df	351	}\r
e55f0cbb	352	\r
697746df	353	void plat_video_wait_vsync(void)\r
697746df	354	{\r
e55f0cbb	355	}\r
e55f0cbb	356	\r
697746df	357	const char *plat_get_credits(void)\r
	358	{\r
	359	return "PicoDrive v" VERSION " (c) notaz, 2006-2009\n\n\n"\r
	360	"Credits:\n"\r
	361	"fDave: Cyclone 68000 core,\n"\r
	362	" base code of PicoDrive\n"\r
	363	"Reesy & FluBBa: DrZ80 core\n"\r
	364	"MAME devs: YM2612 and SN76496 cores\n"\r
	365	"rlyeh and others: minimal SDK\n"\r
	366	"Squidge: mmuhack\n"\r
	367	"Dzz: ARM940 sample\n"\r
	368	"GnoStiC / Puck2099: USB joy code\n"\r
	369	"craigix: GP2X hardware\n"\r
	370	"ketchupgun: skin design\n"\r
	371	"\n"\r
	372	"special thanks (for docs, ideas):\n"\r
	373	" Charles MacDonald, Haze,\n"\r
	374	" Stephane Dallongeville,\n"\r
	375	" Lordus, Exophase, Rokas,\n"\r
	376	" Nemesis, Tasco Deluxe";\r
	377	}\r