X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=gp2x%2Femu.c;fp=gp2x%2Femu.c;h=0000000000000000000000000000000000000000;hb=f506842df2b0e251b56ffe0a828bb2029d423eec;hp=df9faac8d6fc8bb5f20e08e5b53c5620e256aaf2;hpb=ca69c3e5a0ecf407c02dc85c6f3282ebb1efc5a2;p=libpicofe.git

diff --git a/gp2x/emu.c b/gp2x/emu.c
deleted file mode 100644
index df9faac..0000000
--- a/gp2x/emu.c
+++ /dev/null
@@ -1,915 +0,0 @@
-/*
- * (c) Copyright 2006-2010 notaz, All rights reserved.
- *
- * For performance reasons 3 renderers are exported for both MD and 32x modes:
- * - 16bpp line renderer
- * - 8bpp line renderer (slightly faster)
- * - 8bpp tile renderer
- * In 32x mode:
- * - 32x layer is overlayed on top of 16bpp one
- * - line internal one done on PicoDraw2FB, then mixed with 32x
- * - tile internal one done on PicoDraw2FB, then mixed with 32x
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include "plat_gp2x.h"
-#include "soc.h"
-#include "soc_pollux.h"
-#include "../common/plat.h"
-#include "../common/menu.h"
-#include "../common/arm_utils.h"
-#include "../common/fonts.h"
-#include "../common/emu.h"
-#include "../common/config.h"
-#include "../common/input.h"
-#include "../linux/sndout_oss.h"
-#include "version.h"
-
-#include <pico/pico_int.h>
-#include <pico/patch.h>
-#include <pico/sound/mix.h>
-#include <zlib/zlib.h>
-
-#ifdef BENCHMARK
-#define OSD_FPS_X 220
-#else
-#define OSD_FPS_X 260
-#endif
-
-
-extern int crashed_940;
-
-static short __attribute__((aligned(4))) sndBuffer[2*(44100+100)/50];
-static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)];
-unsigned char *PicoDraw2FB = PicoDraw2FB_;
-static int osd_fps_x, osd_y, doing_bg_frame;
-const char *renderer_names[] = { "16bit accurate", " 8bit accurate", " 8bit fast", NULL };
-const char *renderer_names32x[] = { "accurate", "faster", "fastest", NULL };
-enum renderer_types { RT_16BIT, RT_8BIT_ACC, RT_8BIT_FAST, RT_COUNT };
-
-static int (*emu_scan_begin)(unsigned int num) = NULL;
-static int (*emu_scan_end)(unsigned int num) = NULL;
-
-extern void *gp2x_screens[4];
-
-
-void pemu_prep_defconfig(void)
-{
-	gp2x_soc_t soc;
-
-	defaultConfig.CPUclock = default_cpu_clock;
-	defaultConfig.renderer32x = RT_8BIT_FAST;
-	defaultConfig.analog_deadzone = 50;
-
-	soc = soc_detect();
-	if (soc == SOCID_MMSP2)
-		defaultConfig.s_PicoOpt |= POPT_EXT_FM;
-	else if (soc == SOCID_POLLUX) {
-		defaultConfig.EmuOpt |= EOPT_WIZ_TEAR_FIX|EOPT_SHOW_RTC;
-		defaultConfig.s_PicoOpt |= POPT_EN_MCD_GFX;
-	}
-}
-
-void pemu_validate_config(void)
-{
-	if (gp2x_dev_id != GP2X_DEV_GP2X)
-		PicoOpt &= ~POPT_EXT_FM;
-	if (gp2x_dev_id != GP2X_DEV_WIZ)
-		currentConfig.EmuOpt &= ~EOPT_WIZ_TEAR_FIX;
-
-	if (currentConfig.gamma < 10 || currentConfig.gamma > 300)
-		currentConfig.gamma = 100;
-
-	if (currentConfig.CPUclock < 10 || currentConfig.CPUclock > 1024)
-		currentConfig.CPUclock = default_cpu_clock;
-}
-
-static int get_renderer(void)
-{
-	if (PicoAHW & PAHW_32X)
-		return currentConfig.renderer32x;
-	else
-		return currentConfig.renderer;
-}
-
-static void change_renderer(int diff)
-{
-	int *r;
-	if (PicoAHW & PAHW_32X)
-		r = &currentConfig.renderer32x;
-	else
-		r = &currentConfig.renderer;
-	*r += diff;
-
-	// 8bpp fast is not there (yet?)
-	if ((PicoAHW & PAHW_SMS) && *r == RT_8BIT_FAST)
-		(*r)++;
-
-	if      (*r >= RT_COUNT)
-		*r = 0;
-	else if (*r < 0)
-		*r = RT_COUNT - 1;
-}
-
-#define is_16bit_mode() \
-	(get_renderer() == RT_16BIT || (PicoAHW & PAHW_32X))
-
-static void (*osd_text)(int x, int y, const char *text);
-
-static void osd_text8(int x, int y, const char *text)
-{
-	int len = strlen(text)*8;
-	int *p, i, h, offs;
-
-	len = (len+3) >> 2;
-	for (h = 0; h < 8; h++) {
-		offs = (x + g_screen_width * (y+h)) & ~3;
-		p = (int *) ((char *)g_screen_ptr + offs);
-		for (i = len; i; i--, p++)
-			*p = 0xe0e0e0e0;
-	}
-	emu_text_out8(x, y, text);
-}
-
-static void osd_text16(int x, int y, const char *text)
-{
-	int len = strlen(text)*8;
-	int *p, i, h, offs;
-
-	len = (len+1) >> 1;
-	for (h = 0; h < 8; h++) {
-		offs = (x + g_screen_width * (y+h)) & ~1;
-		p = (int *) ((short *)g_screen_ptr + offs);
-		for (i = len; i; i--, p++)
-			*p = (*p >> 2) & 0x39e7;
-	}
-	emu_text_out16(x, y, text);
-}
-
-static void osd_text8_rot(int x, int y, const char *text)
-{
-	int len = strlen(text) * 8;
-	char *p = (char *)g_screen_ptr + 240*(320-x) + y;
-
-	while (len--) {
-		memset(p, 0xe0, 8);
-		p -= 240;
-	}
-
-	emu_text_out8_rot(x, y, text);
-}
-
-static void osd_text16_rot(int x, int y, const char *text)
-{
-	int len = strlen(text) * 8;
-	short *p = (short *)g_screen_ptr + 240*(320-x) + y;
-
-	while (len--) {
-		memset(p, 0, 8*2);
-		p -= 240;
-	}
-
-	emu_text_out16_rot(x, y, text);
-}
-
-static void draw_cd_leds(void)
-{
-	int led_reg, pitch, scr_offs, led_offs;
-	led_reg = Pico_mcd->s68k_regs[0];
-
-	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-		pitch = 240;
-		led_offs = -pitch * 6;
-		scr_offs = pitch * (320 - 4);
-	} else {
-		pitch = 320;
-		led_offs = 4;
-		scr_offs = pitch * 2 + 4;
-	}
-
-	if (!is_16bit_mode()) {
-	#define p(x) px[(x) >> 2]
-		// 8-bit modes
-		unsigned int *px = (unsigned int *)((char *)g_screen_ptr + scr_offs);
-		unsigned int col_g = (led_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;
-		unsigned int col_r = (led_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;
-		p(pitch*0) = p(pitch*1) = p(pitch*2) = col_g;
-		p(pitch*0 + led_offs) = p(pitch*1 + led_offs) = p(pitch*2 + led_offs) = col_r;
-	#undef p
-	} else {
-	#define p(x) px[(x)*2 >> 2] = px[((x)*2 >> 2) + 1]
-		// 16-bit modes
-		unsigned int *px = (unsigned int *)((short *)g_screen_ptr + scr_offs);
-		unsigned int col_g = (led_reg & 2) ? 0x06000600 : 0;
-		unsigned int col_r = (led_reg & 1) ? 0xc000c000 : 0;
-		p(pitch*0) = p(pitch*1) = p(pitch*2) = col_g;
-		p(pitch*0 + led_offs) = p(pitch*1 + led_offs) = p(pitch*2 + led_offs) = col_r;
-	#undef p
-	}
-}
-
-static void draw_pico_ptr(void)
-{
-	unsigned short *p = (unsigned short *)g_screen_ptr;
-	int x, y, pitch = 320;
-
-	// only if pen enabled and for 16bit modes
-	if (pico_inp_mode == 0 || currentConfig.EmuOpt != RT_16BIT)
-		return;
-
-	x = pico_pen_x + PICO_PEN_ADJUST_X;
-	y = pico_pen_y + PICO_PEN_ADJUST_Y;
-	if (!(Pico.video.reg[12]&1) && !(PicoOpt & POPT_DIS_32C_BORDER))
-		x += 32;
-
-	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-		pitch = 240;
-		p += (319 - x) * pitch + y;
-	} else
-		p += x + y * pitch;
-
-	p[0]       ^= 0xffff;
-	p[pitch-1] ^= 0xffff;
-	p[pitch]   ^= 0xffff;
-	p[pitch+1] ^= 0xffff;
-	p[pitch*2] ^= 0xffff;
-}
-
-/* rot thing for Wiz */
-static unsigned char __attribute__((aligned(4))) rot_buff[320*4*2];
-
-static int EmuScanBegin16_rot(unsigned int num)
-{
-	DrawLineDest = rot_buff + (num & 3) * 320 * 2;
-	return 0;
-}
-
-static int EmuScanEnd16_rot(unsigned int num)
-{
-	if ((num & 3) != 3)
-		return 0;
-	rotated_blit16(g_screen_ptr, rot_buff, num + 1,
-		!(Pico.video.reg[12] & 1) && !(PicoOpt & POPT_EN_SOFTSCALE));
-	return 0;
-}
-
-static int EmuScanBegin8_rot(unsigned int num)
-{
-	DrawLineDest = rot_buff + (num & 3) * 320;
-	return 0;
-}
-
-static int EmuScanEnd8_rot(unsigned int num)
-{
-	if ((num & 3) != 3)
-		return 0;
-	rotated_blit8(g_screen_ptr, rot_buff, num + 1,
-		!(Pico.video.reg[12] & 1));
-	return 0;
-}
-
-/* line doublers */
-static unsigned int ld_counter;
-static int ld_left, ld_lines;
-
-static int EmuScanBegin16_ld(unsigned int num)
-{
-	if ((signed int)(ld_counter - num) > 100)
-		ld_counter = 0;
-
-	if (emu_scan_begin)
-		return emu_scan_begin(ld_counter);
-	else
-		DrawLineDest = (char *)g_screen_ptr + 320 * ld_counter * gp2x_current_bpp / 8;
-
-	return 0;
-}
-
-static int EmuScanEnd16_ld(unsigned int num)
-{
-	void *oldline = DrawLineDest;
-
-	if (emu_scan_end)
-		emu_scan_end(ld_counter);
-
-	ld_counter++;
-	ld_left--;
-	if (ld_left <= 0) {
-		ld_left = ld_lines;
-
-		EmuScanBegin16_ld(num);
-		memcpy32(DrawLineDest, oldline, 320 * gp2x_current_bpp / 8 / 4);
-		if (emu_scan_end)
-			emu_scan_end(ld_counter);
-
-		ld_counter++;
-	}
-
-	return 0;
-}
-
-static int localPal[0x100];
-static void (*vidcpyM2)(void *dest, void *src, int m32col, int with_32c_border);
-static int (*make_local_pal)(int fast_mode);
-
-static int make_local_pal_md(int fast_mode)
-{
-	int pallen = 0xc0;
-
-	bgr444_to_rgb32(localPal, Pico.cram);
-	if (fast_mode)
-		return 0x40;
-
-	if (Pico.video.reg[0xC] & 8) { // shadow/hilight mode
-		bgr444_to_rgb32_sh(localPal, Pico.cram);
-		localPal[0xc0] = 0x0000c000;
-		localPal[0xd0] = 0x00c00000;
-		localPal[0xe0] = 0x00000000; // reserved pixels for OSD
-		localPal[0xf0] = 0x00ffffff;
-		pallen = 0x100;
-	}
-	else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes
-		bgr444_to_rgb32(localPal+0x40, HighPal);
-		bgr444_to_rgb32(localPal+0x80, HighPal+0x40);
-	}
-	else
-		memcpy32(localPal+0x80, localPal, 0x40); // for spr prio mess
-
-	return pallen;
-}
-
-static int make_local_pal_sms(int fast_mode)
-{
-	unsigned short *spal = Pico.cram;
-	unsigned int *dpal = (void *)localPal;
-	unsigned int i, t;
-
-	for (i = 0x40; i > 0; i--) {
-		t = *spal++;
-		t = ((t & 0x0003) << 22) | ((t & 0x000c) << 12) | ((t & 0x0030) << 2);
-		t |= t >> 2;
-		t |= t >> 4;
-		*dpal++ = t;
-	}
-
-	return 0x40;
-}
-
-void pemu_finalize_frame(const char *fps, const char *notice)
-{
-	int emu_opt = currentConfig.EmuOpt;
-	int ret;
-
-	if (PicoAHW & PAHW_32X)
-		; // nothing to do
-	else if (get_renderer() == RT_8BIT_FAST)
-	{
-		// 8bit fast renderer
-		if (Pico.m.dirtyPal) {
-			Pico.m.dirtyPal = 0;
-			ret = make_local_pal(1);
-			// feed new palette to our device
-			gp2x_video_setpalette(localPal, ret);
-		}
-		// a hack for VR
-		if (PicoAHW & PAHW_SVP)
-			memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
-		// do actual copy
-		vidcpyM2(g_screen_ptr, PicoDraw2FB+328*8,
-			!(Pico.video.reg[12] & 1), !(PicoOpt & POPT_DIS_32C_BORDER));
-	}
-	else if (get_renderer() == RT_8BIT_ACC)
-	{
-		// 8bit accurate renderer
-		if (Pico.m.dirtyPal)
-		{
-			Pico.m.dirtyPal = 0;
-			ret = make_local_pal(0);
-			gp2x_video_setpalette(localPal, ret);
-		}
-	}
-
-	if (notice)
-		osd_text(4, osd_y, notice);
-	if (emu_opt & EOPT_SHOW_FPS)
-		osd_text(osd_fps_x, osd_y, fps);
-	if ((PicoAHW & PAHW_MCD) && (emu_opt & EOPT_EN_CD_LEDS))
-		draw_cd_leds();
-	if (PicoAHW & PAHW_PICO)
-		draw_pico_ptr();
-}
-
-void plat_video_flip(void)
-{
-	int stride = g_screen_width;
-	gp2x_video_flip();
-
-	if (is_16bit_mode())
-		stride *= 2;
-	PicoDrawSetOutBuf(g_screen_ptr, stride);
-}
-
-/* XXX */
-#ifdef __GP2X__
-unsigned int plat_get_ticks_ms(void)
-{
-	return gp2x_get_ticks_ms();
-}
-
-unsigned int plat_get_ticks_us(void)
-{
-	return gp2x_get_ticks_us();
-}
-#endif
-
-void plat_wait_till_us(unsigned int us_to)
-{
-	unsigned int now;
-
-	spend_cycles(1024);
-	now = plat_get_ticks_us();
-
-	while ((signed int)(us_to - now) > 512)
-	{
-		spend_cycles(1024);
-		now = plat_get_ticks_us();
-	}
-}
-
-void plat_video_wait_vsync(void)
-{
-	gp2x_video_wait_vsync();
-}
-
-void plat_status_msg_clear(void)
-{
-	int is_8bit = !is_16bit_mode();
-	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-		/* ugh.. */
-		int i, u, *p;
-		if (is_8bit) {
-			for (i = 0; i < 4; i++) {
-				p = (int *)gp2x_screens[i] + (240-8) / 4;
-				for (u = 320; u > 0; u--, p += 240/4)
-					p[0] = p[1] = 0xe0e0e0e0;
-			}
-		} else {
-			for (i = 0; i < 4; i++) {
-				p = (int *)gp2x_screens[i] + (240-8)*2 / 4;
-				for (u = 320; u > 0; u--, p += 240*2/4)
-					p[0] = p[1] = p[2] = p[3] = 0;
-			}
-		}
-		return;
-	}
-
-	if (is_8bit)
-		gp2x_memset_all_buffers(320*232, 0xe0, 320*8);
-	else
-		gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);
-}
-
-void plat_status_msg_busy_next(const char *msg)
-{
-	plat_status_msg_clear();
-	pemu_finalize_frame("", msg);
-	plat_video_flip();
-	emu_status_msg("");
-
-	/* assumption: msg_busy_next gets called only when
-	 * something slow is about to happen */
-	reset_timing = 1;
-}
-
-void plat_status_msg_busy_first(const char *msg)
-{
-	gp2x_memcpy_all_buffers(g_screen_ptr, 0, 320*240*2);
-	plat_status_msg_busy_next(msg);
-}
-
-static void vid_reset_mode(void)
-{
-	int gp2x_mode = 16;
-	int renderer = get_renderer();
-
-	PicoOpt &= ~POPT_ALT_RENDERER;
-	emu_scan_begin = NULL;
-	emu_scan_end = NULL;
-
-	switch (renderer) {
-	case RT_16BIT:
-		PicoDrawSetOutFormat(PDF_RGB555, 0);
-		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
-		break;
-	case RT_8BIT_ACC:
-		PicoDrawSetOutFormat(PDF_8BIT, 0);
-		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width);
-		gp2x_mode = 8;
-		break;
-	case RT_8BIT_FAST:
-		PicoOpt |= POPT_ALT_RENDERER;
-		PicoDrawSetOutFormat(PDF_NONE, 0);
-		vidcpyM2 = vidcpy_m2;
-		gp2x_mode = 8;
-		break;
-	default:
-		printf("bad renderer\n");
-		break;
-	}
-
-	if (PicoAHW & PAHW_32X) {
-		// Wiz 16bit is an exception, uses line rendering due to rotation mess
-		if (renderer == RT_16BIT && (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)) {
-			PicoDrawSetOutFormat(PDF_RGB555, 1);
-			PicoDraw32xSetFrameMode(0, 0);
-		}
-		else {
-			PicoDrawSetOutFormat(PDF_NONE, 0);
-			PicoDraw32xSetFrameMode(1, 0);
-		}
-		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
-		gp2x_mode = 16;
-	}
-
-	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-		if ((PicoAHW & PAHW_32X) || renderer == RT_16BIT) {
-			emu_scan_begin = EmuScanBegin16_rot;
-			emu_scan_end = EmuScanEnd16_rot;
-		}
-		else if (renderer == RT_8BIT_ACC) {
-			emu_scan_begin = EmuScanBegin8_rot;
-			emu_scan_end = EmuScanEnd8_rot;
-		}
-		else if (renderer == RT_8BIT_FAST)
-			vidcpyM2 = vidcpy_m2_rot;
-	}
-
-	PicoDrawSetCallbacks(emu_scan_begin, emu_scan_end);
-
-	if (is_16bit_mode())
-		osd_text = (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) ? osd_text16_rot : osd_text16;
-	else
-		osd_text = (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) ? osd_text8_rot : osd_text8;
-
-	gp2x_video_wait_vsync();
-	if (!is_16bit_mode()) {
-		// 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);
-	}
-	else
-		gp2x_memset_all_buffers(0, 0, 320*240*2);
-
-	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)
-		gp2x_mode = -gp2x_mode;
-
-	gp2x_video_changemode(gp2x_mode);
-
-	Pico.m.dirtyPal = 1;
-
-	PicoOpt &= ~POPT_EN_SOFTSCALE;
-	if (currentConfig.scaling == EOPT_SCALE_SW)
-		PicoOpt |= POPT_EN_SOFTSCALE;
-
-	// palette converters for 8bit modes
-	make_local_pal = (PicoAHW & PAHW_SMS) ? make_local_pal_sms : make_local_pal_md;
-}
-
-void emu_video_mode_change(int start_line, int line_count, int is_32cols)
-{
-	int scalex = 320, scaley = 240;
-	int ln_offs = 0;
-
-	if (doing_bg_frame)
-		return;
-
-	osd_fps_x = OSD_FPS_X;
-	osd_y = 232;
-
-	/* set up hwscaling here */
-	PicoOpt &= ~POPT_DIS_32C_BORDER;
-	if (is_32cols && currentConfig.scaling == EOPT_SCALE_HW) {
-		scalex = 256;
-		PicoOpt |= POPT_DIS_32C_BORDER;
-		osd_fps_x = OSD_FPS_X - 64;
-	}
-
-	if (currentConfig.vscaling == EOPT_SCALE_HW) {
-		ln_offs = start_line;
-		scaley = line_count;
-		osd_y = start_line + line_count - 8;
-	}
-
-	gp2x_video_RGB_setscaling(ln_offs, scalex, scaley);
-
-	/* line doubling */
-	if (currentConfig.vscaling == EOPT_SCALE_SW && line_count < 240) {
-		ld_lines = ld_left = line_count / (240 - line_count);
-		PicoDrawSetCallbacks(EmuScanBegin16_ld, EmuScanEnd16_ld);
-	}
-
-	// clear whole screen in all buffers
-	if (!is_16bit_mode())
-		gp2x_memset_all_buffers(0, 0xe0, 320*240);
-	else
-		gp2x_memset_all_buffers(0, 0, 320*240*2);
-}
-
-void plat_video_toggle_renderer(int change, int is_menu_call)
-{
-	change_renderer(change);
-
-	if (is_menu_call)
-		return;
-
-	vid_reset_mode();
-	rendstatus_old = -1;
-
-	if (PicoAHW & PAHW_32X)
-		emu_status_msg(renderer_names32x[get_renderer()]);
-	else
-		emu_status_msg(renderer_names[get_renderer()]);
-}
-
-#if 0 // TODO
-static void RunEventsPico(unsigned int events)
-{
-	int ret, px, py, lim_x;
-	static int pdown_frames = 0;
-
-	// for F200
-	ret = gp2x_touchpad_read(&px, &py);
-	if (ret >= 0)
-	{
-		if (ret > 35000)
-		{
-			if (pdown_frames++ > 5)
-				PicoPad[0] |= 0x20;
-
-			pico_pen_x = px;
-			pico_pen_y = py;
-			if (!(Pico.video.reg[12]&1)) {
-				pico_pen_x -= 32;
-				if (pico_pen_x <   0) pico_pen_x = 0;
-				if (pico_pen_x > 248) pico_pen_x = 248;
-			}
-			if (pico_pen_y > 224) pico_pen_y = 224;
-		}
-		else
-			pdown_frames = 0;
-
-		//if (ret == 0)
-		//	PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;
-	}
-}
-#endif
-
-void plat_update_volume(int has_changed, int is_up)
-{
-	static int prev_frame = 0, wait_frames = 0;
-	int vol = currentConfig.volume;
-	int need_low_volume = 0;
-	gp2x_soc_t soc;
-
-	soc = soc_detect();
-	if ((PicoOpt & POPT_EN_STEREO) && soc == SOCID_MMSP2)
-		need_low_volume = 1;
-
-	if (has_changed)
-	{
-		if (need_low_volume && vol < 5 && 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;
-			sndout_oss_setvol(vol, vol);
-			currentConfig.volume = vol;
-		}
-		emu_status_msg("VOL: %02i", vol);
-		prev_frame = Pico.m.frame_count;
-	}
-
-	if (!need_low_volume)
-		return;
-
-	/* set the right mixer func */
-	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 oss_write_nonblocking(int len)
-{
-	// sndout_oss_can_write() is not reliable, only use with no_frmlimit
-	if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))
-		return;
-
-	sndout_oss_write_nb(PsndOut, len);
-}
-
-void pemu_sound_start(void)
-{
-	static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
-
-	PsndOut = NULL;
-
-	// prepare sound stuff
-	if (currentConfig.EmuOpt & EOPT_EN_SOUND)
-	{
-		int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;
-		int snd_rate_oss = PsndRate;
-		gp2x_soc_t soc;
-
-		memset(sndBuffer, 0, sizeof(sndBuffer));
-		PsndOut = sndBuffer;
-		PicoWriteSound = oss_write_nonblocking;
-		plat_update_volume(0, 0);
-
-		printf("starting audio: %i len: %i stereo: %i, pal: %i\n",
-			PsndRate, PsndLen, is_stereo, Pico.m.pal);
-		sndout_oss_start(snd_rate_oss, is_stereo, 1);
-		sndout_oss_setvol(currentConfig.volume, currentConfig.volume);
-
-		soc = soc_detect();
-		if (soc == SOCID_POLLUX)
-			PsndRate = pollux_get_real_snd_rate(PsndRate);
-
-		#define SOUND_RERATE_FLAGS (POPT_EN_FM|POPT_EN_PSG|POPT_EN_STEREO|POPT_EXT_FM|POPT_EN_MCD_CDDA)
-		if (PsndRate != PsndRate_old || Pico.m.pal != pal_old || ((PicoOpt & POPT_EXT_FM) && crashed_940) ||
-				((PicoOpt ^ PicoOpt_old) & SOUND_RERATE_FLAGS)) {
-			PsndRerate(Pico.m.frame_count ? 1 : 0);
-		}
-
-		PsndRate_old = PsndRate;
-		PicoOpt_old  = PicoOpt;
-		pal_old = Pico.m.pal;
-	}
-}
-
-static const int sound_rates[] = { 44100, 32000, 22050, 16000, 11025, 8000 };
-
-void pemu_sound_stop(void)
-{
-	int i;
-
-	/* get back from Pollux pain */
-	PsndRate += 1000;
-	for (i = 0; i < ARRAY_SIZE(sound_rates); i++) {
-		if (PsndRate >= sound_rates[i]) {
-			PsndRate = sound_rates[i];
-			break;
-		}
-	}
-}
-
-void pemu_sound_wait(void)
-{
-	// don't need to do anything, writes will block by themselves
-}
-
-void pemu_forced_frame(int no_scale, int do_emu)
-{
-	doing_bg_frame = 1;
-	PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
-	PicoDraw32xSetFrameMode(0, 0);
-	PicoDrawSetCallbacks(NULL, NULL);
-	Pico.m.dirtyPal = 1;
-
-	emu_cmn_forced_frame(no_scale, do_emu);
-
-	g_menubg_src_ptr = g_screen_ptr;
-	doing_bg_frame = 0;
-}
-
-void plat_debug_cat(char *str)
-{
-}
-
-#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 *)g_screen_ptr)[i])) break;
-	if (i < 320*240)
-	{
-		for (i = 0; i < 320*240; i++)
-			oldscr[i] = CONV(((unsigned short *)g_screen_ptr)[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 pemu_loop_prep(void)
-{
-	static int gp2x_old_clock = -1, EmuOpt_old = 0, pal_old = 0;
-	static int gp2x_old_gamma = 100;
-	gp2x_soc_t soc;
-
-	soc = soc_detect();
-
-	if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_RAM_TIMINGS) {
-		if (currentConfig.EmuOpt & EOPT_RAM_TIMINGS)
-			set_ram_timings();
-		else
-			unset_ram_timings();
-	}
-
-	if (gp2x_old_clock < 0)
-		gp2x_old_clock = default_cpu_clock;
-	if (gp2x_old_clock != currentConfig.CPUclock && gp2x_set_cpuclk != NULL) {
-		printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);
-		gp2x_set_cpuclk(currentConfig.CPUclock);
-		gp2x_old_clock = currentConfig.CPUclock;
-		printf(" done\n");
-	}
-
-	if (gp2x_old_gamma != currentConfig.gamma || ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_A_SN_GAMMA)) {
-		set_lcd_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt & EOPT_A_SN_GAMMA));
-		gp2x_old_gamma = currentConfig.gamma;
-		printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));
-	}
-
-	if (((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_VSYNC) || Pico.m.pal != pal_old) {
-		if ((currentConfig.EmuOpt & EOPT_VSYNC) || soc == SOCID_POLLUX)
-			set_lcd_custom_rate(Pico.m.pal);
-		else if (EmuOpt_old & EOPT_VSYNC)
-			unset_lcd_custom_rate();
-	}
-
-	if (gp2x_dev_id == GP2X_DEV_CAANOO)
-		in_set_config_int(in_name_to_id("evdev:pollux-analog"), IN_CFG_ABS_DEAD_ZONE,
-				currentConfig.analog_deadzone);
-
-	if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_MMUHACK)
-		gp2x_make_fb_bufferable(currentConfig.EmuOpt & EOPT_MMUHACK);
-
-	EmuOpt_old = currentConfig.EmuOpt;
-	pal_old = Pico.m.pal;
-
-	// make sure we are in correct mode
-	change_renderer(0);
-	vid_reset_mode();
-
-	// dirty buffers better go now than during gameplay
-	sync();
-	sleep(0);
-
-	pemu_sound_start();
-}
-
-void pemu_loop_end(void)
-{
-	pemu_sound_stop();
-
-	/* do one more frame for menu bg */
-	pemu_forced_frame(0, 1);
-}
-