[picodrive.git] / platform / libretro.c

/*
 * libretro core glue for PicoDrive
 * (C) notaz, 2013
 *
 * This work is licensed under the terms of MAME license.
 * See COPYING file in the top-level directory.
 */

#define _GNU_SOURCE 1 // mremap
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#ifndef _WIN32
#include <sys/mman.h>
#else
#include <io.h>
#include <windows.h>
#include <sys/types.h>
#endif
#include <errno.h>
#ifdef __MACH__
#include <libkern/OSCacheControl.h>
#endif

#include <pico/pico_int.h>
#include <pico/state.h>
#include "common/input_pico.h"
#include "common/version.h"
#include "libretro.h"

#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif

static retro_video_refresh_t video_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
static retro_environment_t environ_cb;
static retro_audio_sample_batch_t audio_batch_cb;

static FILE *emu_log;

#define VOUT_MAX_WIDTH 320
#define VOUT_MAX_HEIGHT 240
static void *vout_buf;
static int vout_width, vout_height;

static short __attribute__((aligned(4))) sndBuffer[2*44100/50];

static void snd_write(int len);

#ifdef _WIN32
#define SLASH '\\'
#else
#define SLASH '/'
#endif

/* functions called by the core */

void cache_flush_d_inval_i(void *start, void *end)
{
#ifdef __arm__
#if defined(__BLACKBERRY_QNX__)
	msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
#elif defined(__MACH__)
	size_t len = (char *)end - (char *)start;
	sys_dcache_flush(start, len);
	sys_icache_invalidate(start, len);
#else
	__clear_cache(start, end);
#endif
#endif
}

#ifdef _WIN32
/* mmap() replacement for Windows
 *
 * Author: Mike Frysinger <vapier@gentoo.org>
 * Placed into the public domain
 */

/* References:
 * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
 * CloseHandle:       http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
 * MapViewOfFile:     http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
 * UnmapViewOfFile:   http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
 */

#define PROT_READ     0x1
#define PROT_WRITE    0x2
/* This flag is only available in WinXP+ */
#ifdef FILE_MAP_EXECUTE
#define PROT_EXEC     0x4
#else
#define PROT_EXEC        0x0
#define FILE_MAP_EXECUTE 0
#endif

#define MAP_SHARED    0x01
#define MAP_PRIVATE   0x02
#define MAP_ANONYMOUS 0x20
#define MAP_ANON      MAP_ANONYMOUS
#define MAP_FAILED    ((void *) -1)

#ifdef __USE_FILE_OFFSET64
# define DWORD_HI(x) (x >> 32)
# define DWORD_LO(x) ((x) & 0xffffffff)
#else
# define DWORD_HI(x) (0)
# define DWORD_LO(x) (x)
#endif

static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
{
	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
		return MAP_FAILED;
	if (fd == -1) {
		if (!(flags & MAP_ANON) || offset)
			return MAP_FAILED;
	} else if (flags & MAP_ANON)
		return MAP_FAILED;

	DWORD flProtect;
	if (prot & PROT_WRITE) {
		if (prot & PROT_EXEC)
			flProtect = PAGE_EXECUTE_READWRITE;
		else
			flProtect = PAGE_READWRITE;
	} else if (prot & PROT_EXEC) {
		if (prot & PROT_READ)
			flProtect = PAGE_EXECUTE_READ;
		else if (prot & PROT_EXEC)
			flProtect = PAGE_EXECUTE;
	} else
		flProtect = PAGE_READONLY;

	off_t end = length + offset;
	HANDLE mmap_fd, h;
	if (fd == -1)
		mmap_fd = INVALID_HANDLE_VALUE;
	else
		mmap_fd = (HANDLE)_get_osfhandle(fd);
	h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
	if (h == NULL)
		return MAP_FAILED;

	DWORD dwDesiredAccess;
	if (prot & PROT_WRITE)
		dwDesiredAccess = FILE_MAP_WRITE;
	else
		dwDesiredAccess = FILE_MAP_READ;
	if (prot & PROT_EXEC)
		dwDesiredAccess |= FILE_MAP_EXECUTE;
	if (flags & MAP_PRIVATE)
		dwDesiredAccess |= FILE_MAP_COPY;
	void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
	if (ret == NULL) {
		CloseHandle(h);
		ret = MAP_FAILED;
	}
	return ret;
}

static void munmap(void *addr, size_t length)
{
	UnmapViewOfFile(addr);
	/* ruh-ro, we leaked handle from CreateFileMapping() ... */
}
#endif
void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
{
#ifndef _WIN32
   int flags = 0;
   void *ret = mmap((void*)addr,size,PROT_READ | PROT_WRITE, flags, -1, 0);
   if (addr != 0 && ret != (void *)addr) {
      lprintf("warning: wanted to map @%08lx, got %p\n",
            addr, ret);

      if (is_fixed) {
         munmap(ret, size);
         return NULL;
      }
   }
#else
   int flags = MAP_PRIVATE | MAP_ANONYMOUS;
   void *req, *ret;

   req = (void *)addr;
   ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
   if (ret == MAP_FAILED) {
      lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
      return NULL;
   }

   if (addr != 0 && ret != (void *)addr) {
      lprintf("warning: wanted to map @%08lx, got %p\n",
            addr, ret);

      if (is_fixed) {
         munmap(ret, size);
         return NULL;
      }
   }
#endif

	return ret;
}

void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
{
#ifdef __linux__
	void *ret = mremap(ptr, oldsize, newsize, 0);
	if (ret == MAP_FAILED)
		return NULL;

	return ret;
#else
	void *tmp, *ret;
	size_t preserve_size;
	
	preserve_size = oldsize;
	if (preserve_size > newsize)
		preserve_size = newsize;
	tmp = malloc(preserve_size);
	if (tmp == NULL)
		return NULL;
	memcpy(tmp, ptr, preserve_size);

	munmap(ptr, oldsize);
	ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
		   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
	if (ret == MAP_FAILED) {
		free(tmp);
		return NULL;
	}
	memcpy(ret, tmp, preserve_size);
	free(tmp);
	return ret;
#endif
}

void plat_munmap(void *ptr, size_t size)
{
	if (ptr != NULL)
		munmap(ptr, size);
}

int plat_mem_set_exec(void *ptr, size_t size)
{
#ifdef _WIN32
   int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
   if (ret == 0)
      lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
#else
   int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
   if (ret != 0)
      lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
#endif
	return ret;
}

void emu_video_mode_change(int start_line, int line_count, int is_32cols)
{
	memset(vout_buf, 0, 320 * 240 * 2);
	vout_width = is_32cols ? 256 : 320;
	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
}

void emu_32x_startup(void)
{
}

#ifndef ANDROID

void lprintf(const char *fmt, ...)
{
	va_list list;

	va_start(list, fmt);
	fprintf(emu_log, "PicoDrive: ");
	vfprintf(emu_log, fmt, list);
	va_end(list);
	fflush(emu_log);
}

#else

#include <android/log.h>

void lprintf(const char *fmt, ...)
{
	va_list list;

	va_start(list, fmt);
	__android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
	va_end(list);
}

#endif

/* libretro */
void retro_set_environment(retro_environment_t cb)
{
	static const struct retro_variable vars[] = {
		//{ "region", "Region; Auto|NTSC|PAL" },
		{ NULL, NULL },
	};

	environ_cb = cb;

	cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
}

void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }

unsigned retro_api_version(void)
{
	return RETRO_API_VERSION;
}

void retro_set_controller_port_device(unsigned port, unsigned device)
{
}

void retro_get_system_info(struct retro_system_info *info)
{
	memset(info, 0, sizeof(*info));
	info->library_name = "PicoDrive";
	info->library_version = VERSION;
	info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
	info->need_fullpath = true;
}

void retro_get_system_av_info(struct retro_system_av_info *info)
{
	memset(info, 0, sizeof(*info));
	info->timing.fps            = Pico.m.pal ? 50 : 60;
	info->timing.sample_rate    = 44100;
	info->geometry.base_width   = 320;
	info->geometry.base_height  = 240;
	info->geometry.max_width    = VOUT_MAX_WIDTH;
	info->geometry.max_height   = VOUT_MAX_HEIGHT;
	info->geometry.aspect_ratio = 4.0 / 3.0;
}

/* savestates */
struct savestate_state {
	const char *load_buf;
	char *save_buf;
	size_t size;
	size_t pos;
};

size_t state_read(void *p, size_t size, size_t nmemb, void *file)
{
	struct savestate_state *state = file;
	size_t bsize = size * nmemb;

	if (state->pos + bsize > state->size) {
		lprintf("savestate error: %u/%u\n",
			state->pos + bsize, state->size);
		bsize = state->size - state->pos;
		if ((int)bsize <= 0)
			return 0;
	}

	memcpy(p, state->load_buf + state->pos, bsize);
	state->pos += bsize;
	return bsize;
}

size_t state_write(void *p, size_t size, size_t nmemb, void *file)
{
	struct savestate_state *state = file;
	size_t bsize = size * nmemb;

	if (state->pos + bsize > state->size) {
		lprintf("savestate error: %u/%u\n",
			state->pos + bsize, state->size);
		bsize = state->size - state->pos;
		if ((int)bsize <= 0)
			return 0;
	}

	memcpy(state->save_buf + state->pos, p, bsize);
	state->pos += bsize;
	return bsize;
}

size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
{
	struct savestate_state *state = file;
	size_t bsize = size * nmemb;

	state->pos += bsize;
	return bsize;
}

size_t state_eof(void *file)
{
	struct savestate_state *state = file;

	return state->pos >= state->size;
}

int state_fseek(void *file, long offset, int whence)
{
	struct savestate_state *state = file;

	switch (whence) {
	case SEEK_SET:
		state->pos = offset;
		break;
	case SEEK_CUR:
		state->pos += offset;
		break;
	case SEEK_END:
		state->pos = state->size + offset;
		break;
	}
	return (int)state->pos;
}

/* savestate sizes vary wildly depending if cd/32x or
 * carthw is active, so run the whole thing to get size */
size_t retro_serialize_size(void) 
{ 
	struct savestate_state state = { 0, };
	int ret;

	ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
	if (ret != 0)
		return 0;

	return state.pos;
}

bool retro_serialize(void *data, size_t size)
{ 
	struct savestate_state state = { 0, };
	int ret;

	state.save_buf = data;
	state.size = size;
	state.pos = 0;

	ret = PicoStateFP(&state, 1, NULL, state_write,
		NULL, state_fseek);
	return ret == 0;
}

bool retro_unserialize(const void *data, size_t size)
{
	struct savestate_state state = { 0, };
	int ret;

	state.load_buf = data;
	state.size = size;
	state.pos = 0;

	ret = PicoStateFP(&state, 0, state_read, NULL,
		state_eof, state_fseek);
	return ret == 0;
}

/* cheats - TODO */
void retro_cheat_reset(void)
{
}

void retro_cheat_set(unsigned index, bool enabled, const char *code)
{
}

/* multidisk support */
static bool disk_ejected;
static unsigned int disk_current_index;
static unsigned int disk_count;
static struct disks_state {
	char *fname;
} disks[8];

static bool disk_set_eject_state(bool ejected)
{
	// TODO?
	disk_ejected = ejected;
	return true;
}

static bool disk_get_eject_state(void)
{
	return disk_ejected;
}

static unsigned int disk_get_image_index(void)
{
	return disk_current_index;
}

static bool disk_set_image_index(unsigned int index)
{
	cd_img_type cd_type;
	int ret;

	if (index >= sizeof(disks) / sizeof(disks[0]))
		return false;

	if (disks[index].fname == NULL) {
		lprintf("missing disk #%u\n", index);

		// RetroArch specifies "no disk" with index == count,
		// so don't fail here..
		disk_current_index = index;
		return true;
	}

	lprintf("switching to disk %u: \"%s\"\n", index,
		disks[index].fname);

	ret = -1;
	cd_type = PicoCdCheck(disks[index].fname, NULL);
	if (cd_type != CIT_NOT_CD)
		ret = Insert_CD(disks[index].fname, cd_type);
	if (ret != 0) {
		lprintf("Load failed, invalid CD image?\n");
		return 0;
	}

	disk_current_index = index;
	return true;
}

static unsigned int disk_get_num_images(void)
{
	return disk_count;
}

static bool disk_replace_image_index(unsigned index,
	const struct retro_game_info *info)
{
	bool ret = true;

	if (index >= sizeof(disks) / sizeof(disks[0]))
		return false;

	if (disks[index].fname != NULL)
		free(disks[index].fname);
	disks[index].fname = NULL;

	if (info != NULL) {
		disks[index].fname = strdup(info->path);
		if (index == disk_current_index)
			ret = disk_set_image_index(index);
	}

	return ret;
}

static bool disk_add_image_index(void)
{
	if (disk_count >= sizeof(disks) / sizeof(disks[0]))
		return false;

	disk_count++;
	return true;
}

static struct retro_disk_control_callback disk_control = {
	.set_eject_state = disk_set_eject_state,
	.get_eject_state = disk_get_eject_state,
	.get_image_index = disk_get_image_index,
	.set_image_index = disk_set_image_index,
	.get_num_images = disk_get_num_images,
	.replace_image_index = disk_replace_image_index,
	.add_image_index = disk_add_image_index,
};

static void disk_tray_open(void)
{
	lprintf("cd tray open\n");
	disk_ejected = 1;
}

static void disk_tray_close(void)
{
	lprintf("cd tray close\n");
	disk_ejected = 0;
}


static const char * const biosfiles_us[] = {
	"us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
};
static const char * const biosfiles_eu[] = {
	"eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
};
static const char * const biosfiles_jp[] = {
	"jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
};

static void make_system_path(char *buf, size_t buf_size,
	const char *name, const char *ext)
{
	const char *dir = NULL;

	if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
		snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
	}
	else {
		snprintf(buf, buf_size, "%s%s", name, ext);
	}
}

static const char *find_bios(int *region, const char *cd_fname)
{
	const char * const *files;
	static char path[256];
	int i, count;
	FILE *f = NULL;

	if (*region == 4) { // US
		files = biosfiles_us;
		count = sizeof(biosfiles_us) / sizeof(char *);
	} else if (*region == 8) { // EU
		files = biosfiles_eu;
		count = sizeof(biosfiles_eu) / sizeof(char *);
	} else if (*region == 1 || *region == 2) {
		files = biosfiles_jp;
		count = sizeof(biosfiles_jp) / sizeof(char *);
	} else {
		return NULL;
	}

	for (i = 0; i < count; i++)
	{
		make_system_path(path, sizeof(path), files[i], ".bin");
		f = fopen(path, "rb");
		if (f != NULL)
			break;

		make_system_path(path, sizeof(path), files[i], ".zip");
		f = fopen(path, "rb");
		if (f != NULL)
			break;
	}

	if (f != NULL) {
		lprintf("using bios: %s\n", path);
		fclose(f);
		return path;
	}

	return NULL;
}

bool retro_load_game(const struct retro_game_info *info)
{
	enum media_type_e media_type;
	static char carthw_path[256];
	size_t i;

	enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
	if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
		lprintf("RGB565 suppot required, sorry\n");
		return false;
	}

	if (info == NULL || info->path == NULL) {
		lprintf("info->path required\n");
		return false;
	}

	for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
		if (disks[i].fname != NULL) {
			free(disks[i].fname);
			disks[i].fname = NULL;
		}
	}

	disk_current_index = 0;
	disk_count = 1;
	disks[0].fname = strdup(info->path);

	make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");

	media_type = PicoLoadMedia(info->path, carthw_path,
			find_bios, NULL);

	switch (media_type) {
	case PM_BAD_DETECT:
		lprintf("Failed to detect ROM/CD image type.\n");
		return false;
	case PM_BAD_CD:
		lprintf("Invalid CD image\n");
		return false;
	case PM_BAD_CD_NO_BIOS:
		lprintf("Missing BIOS\n");
		return false;
	case PM_ERROR:
		lprintf("Load error\n");
		return false;
	default:
		break;
	}

	PicoLoopPrepare();

	PicoWriteSound = snd_write;
	memset(sndBuffer, 0, sizeof(sndBuffer));
	PsndOut = sndBuffer;
	PsndRerate(1);

	return true;
}

bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
{
	return false;
}

void retro_unload_game(void) 
{
}

unsigned retro_get_region(void)
{
	return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
}

void *retro_get_memory_data(unsigned id)
{
	if (id != RETRO_MEMORY_SAVE_RAM)
		return NULL;

	if (PicoAHW & PAHW_MCD)
		return Pico_mcd->bram;
	else
		return SRam.data;
}

size_t retro_get_memory_size(unsigned id)
{
	if (id != RETRO_MEMORY_SAVE_RAM)
		return 0;

	if (PicoAHW & PAHW_MCD)
		// bram
		return 0x2000;
	else
		return SRam.size;
}

void retro_reset(void)
{
	PicoReset();
}

static const unsigned short retro_pico_map[] = {
	[RETRO_DEVICE_ID_JOYPAD_B]	= 1 << GBTN_B,
	[RETRO_DEVICE_ID_JOYPAD_Y]	= 1 << GBTN_A,
	[RETRO_DEVICE_ID_JOYPAD_SELECT]	= 1 << GBTN_MODE,
	[RETRO_DEVICE_ID_JOYPAD_START]	= 1 << GBTN_START,
	[RETRO_DEVICE_ID_JOYPAD_UP]	= 1 << GBTN_UP,
	[RETRO_DEVICE_ID_JOYPAD_DOWN]	= 1 << GBTN_DOWN,
	[RETRO_DEVICE_ID_JOYPAD_LEFT]	= 1 << GBTN_LEFT,
	[RETRO_DEVICE_ID_JOYPAD_RIGHT]	= 1 << GBTN_RIGHT,
	[RETRO_DEVICE_ID_JOYPAD_A]	= 1 << GBTN_C,
	[RETRO_DEVICE_ID_JOYPAD_X]	= 1 << GBTN_Y,
	[RETRO_DEVICE_ID_JOYPAD_L]	= 1 << GBTN_X,
	[RETRO_DEVICE_ID_JOYPAD_R]	= 1 << GBTN_Z,
};
#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))

static void snd_write(int len)
{
	audio_batch_cb(PsndOut, len / 4);
}

void retro_run(void) 
{
	bool updated = false;
	int pad, i;

	if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
		; //update_variables(true);

	input_poll_cb();

	PicoPad[0] = PicoPad[1] = 0;
	for (pad = 0; pad < 2; pad++)
		for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
			if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
				PicoPad[pad] |= retro_pico_map[i];

	PicoFrame();

	video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
}

void retro_init(void)
{
	int level;

#ifdef IOS
	emu_log = fopen("/User/Documents/PicoDrive.log", "w");
	if (emu_log == NULL)
		emu_log = fopen("PicoDrive.log", "w");
	if (emu_log == NULL)
#endif
	emu_log = stdout;

	level = 0;
	environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);

	environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);

	PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
		| POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
		| POPT_EN_32X|POPT_EN_PWM
		| POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
#ifdef __arm__
	PicoOpt |= POPT_EN_SVP_DRC;
#endif
	PsndRate = 44100;
	PicoAutoRgnOrder = 0x184; // US, EU, JP
	PicoCDBuffers = 0;

	vout_width = 320;
	vout_height = 240;
	vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);

	PicoInit();
	PicoDrawSetOutFormat(PDF_RGB555, 0);
	PicoDrawSetOutBuf(vout_buf, vout_width * 2);

	//PicoMessage = plat_status_msg_busy_next;
	PicoMCDopenTray = disk_tray_open;
	PicoMCDcloseTray = disk_tray_close;
}

void retro_deinit(void)
{
	PicoExit();
}
Commit	Line	Data
2446536b	1	/*
	2	* libretro core glue for PicoDrive
	3	* (C) notaz, 2013
	4	*
	5	* This work is licensed under the terms of MAME license.
	6	* See COPYING file in the top-level directory.
	7	*/
	8
	9	#define _GNU_SOURCE 1 // mremap
	10	#include <stdio.h>
	11	#include <stdarg.h>
	12	#include <string.h>
e8b61936	13	#ifndef _WIN32
2446536b	14	#include <sys/mman.h>
e8b61936	15	#else
6f1133bc	16	#include <io.h>
e8b61936	17	#include <windows.h>
6f1133bc	18	#include <sys/types.h>
e8b61936	19	#endif
c25d78ee	20	#include <errno.h>
2446536b	21	#ifdef __MACH__
	22	#include <libkern/OSCacheControl.h>
	23	#endif
	24
	25	#include <pico/pico_int.h>
86b38dc4	26	#include <pico/state.h>
2446536b	27	#include "common/input_pico.h"
	28	#include "common/version.h"
	29	#include "libretro.h"
	30
8c8b7284	31	#ifndef MAP_ANONYMOUS
	32	#define MAP_ANONYMOUS MAP_ANON
	33	#endif
	34
2446536b	35	static retro_video_refresh_t video_cb;
	36	static retro_input_poll_t input_poll_cb;
	37	static retro_input_state_t input_state_cb;
	38	static retro_environment_t environ_cb;
	39	static retro_audio_sample_batch_t audio_batch_cb;
	40
	41	static FILE *emu_log;
	42
	43	#define VOUT_MAX_WIDTH 320
	44	#define VOUT_MAX_HEIGHT 240
	45	static void *vout_buf;
	46	static int vout_width, vout_height;
	47
	48	static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
	49
2446536b	50	static void snd_write(int len);
	51
	52	#ifdef _WIN32
	53	#define SLASH '\\'
	54	#else
	55	#define SLASH '/'
	56	#endif
	57
	58	/* functions called by the core */
	59
	60	void cache_flush_d_inval_i(void start, void end)
	61	{
	62	#ifdef __arm__
	63	#if defined(__BLACKBERRY_QNX__)
	64	msync(start, end - start, MS_SYNC \| MS_CACHE_ONLY \| MS_INVALIDATE_ICACHE);
	65	#elif defined(__MACH__)
	66	size_t len = (char )end - (char )start;
	67	sys_dcache_flush(start, len);
	68	sys_icache_invalidate(start, len);
	69	#else
	70	__clear_cache(start, end);
	71	#endif
	72	#endif
	73	}
	74
e8b61936	75	#ifdef _WIN32
6f1133bc T	76	/* mmap() replacement for Windows
	77	*
	78	* Author: Mike Frysinger <vapier@gentoo.org>
	79	* Placed into the public domain
	80	*/
	81
	82	/* References:
	83	* CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
	84	* CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
	85	* MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
	86	* UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
	87	*/
	88
	89	#define PROT_READ 0x1
	90	#define PROT_WRITE 0x2
	91	/* This flag is only available in WinXP+ */
	92	#ifdef FILE_MAP_EXECUTE
	93	#define PROT_EXEC 0x4
	94	#else
	95	#define PROT_EXEC 0x0
	96	#define FILE_MAP_EXECUTE 0
	97	#endif
	98
	99	#define MAP_SHARED 0x01
	100	#define MAP_PRIVATE 0x02
	101	#define MAP_ANONYMOUS 0x20
	102	#define MAP_ANON MAP_ANONYMOUS
	103	#define MAP_FAILED ((void *) -1)
	104
	105	#ifdef __USE_FILE_OFFSET64
	106	# define DWORD_HI(x) (x >> 32)
	107	# define DWORD_LO(x) ((x) & 0xffffffff)
	108	#else
	109	# define DWORD_HI(x) (0)
	110	# define DWORD_LO(x) (x)
	111	#endif
	112
	113	static void mmap(void start, size_t length, int prot, int flags, int fd, off_t offset)
2446536b	114	{
6f1133bc T	115	if (prot & ~(PROT_READ \| PROT_WRITE \| PROT_EXEC))
	116	return MAP_FAILED;
	117	if (fd == -1) {
	118	if (!(flags & MAP_ANON) \|\| offset)
	119	return MAP_FAILED;
	120	} else if (flags & MAP_ANON)
	121	return MAP_FAILED;
	122
	123	DWORD flProtect;
	124	if (prot & PROT_WRITE) {
	125	if (prot & PROT_EXEC)
	126	flProtect = PAGE_EXECUTE_READWRITE;
	127	else
	128	flProtect = PAGE_READWRITE;
	129	} else if (prot & PROT_EXEC) {
	130	if (prot & PROT_READ)
	131	flProtect = PAGE_EXECUTE_READ;
	132	else if (prot & PROT_EXEC)
	133	flProtect = PAGE_EXECUTE;
	134	} else
	135	flProtect = PAGE_READONLY;
	136
	137	off_t end = length + offset;
	138	HANDLE mmap_fd, h;
	139	if (fd == -1)
	140	mmap_fd = INVALID_HANDLE_VALUE;
	141	else
	142	mmap_fd = (HANDLE)_get_osfhandle(fd);
	143	h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
	144	if (h == NULL)
	145	return MAP_FAILED;
	146
	147	DWORD dwDesiredAccess;
	148	if (prot & PROT_WRITE)
	149	dwDesiredAccess = FILE_MAP_WRITE;
	150	else
	151	dwDesiredAccess = FILE_MAP_READ;
	152	if (prot & PROT_EXEC)
	153	dwDesiredAccess \|= FILE_MAP_EXECUTE;
	154	if (flags & MAP_PRIVATE)
	155	dwDesiredAccess \|= FILE_MAP_COPY;
	156	void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
	157	if (ret == NULL) {
	158	CloseHandle(h);
	159	ret = MAP_FAILED;
	160	}
	161	return ret;
e8b61936	162	}
2446536b	163
6f1133bc	164	static void munmap(void *addr, size_t length)
e8b61936	165	{
6f1133bc T	166	UnmapViewOfFile(addr);
6f1133bc T	167	/* ruh-ro, we leaked handle from CreateFileMapping() ... */
e8b61936	168	}
e8b61936	169	#endif
	170	void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
	171	{
	172	#ifndef _WIN32
	173	int flags = 0;
	174	void ret = mmap((void)addr,size,PROT_READ \| PROT_WRITE, flags, -1, 0);
	175	if (addr != 0 && ret != (void *)addr) {
	176	lprintf("warning: wanted to map @%08lx, got %p\n",
	177	addr, ret);
	178
	179	if (is_fixed) {
	180	munmap(ret, size);
	181	return NULL;
	182	}
	183	}
	184	#else
	185	int flags = MAP_PRIVATE \| MAP_ANONYMOUS;
	186	void req, ret;
	187
	188	req = (void *)addr;
	189	ret = mmap(req, size, PROT_READ \| PROT_WRITE, flags, -1, 0);
	190	if (ret == MAP_FAILED) {
	191	lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
	192	return NULL;
	193	}
	194
	195	if (addr != 0 && ret != (void *)addr) {
	196	lprintf("warning: wanted to map @%08lx, got %p\n",
	197	addr, ret);
	198
	199	if (is_fixed) {
	200	munmap(ret, size);
	201	return NULL;
	202	}
	203	}
	204	#endif
2446536b	205
	206	return ret;
	207	}
	208
	209	void plat_mremap(void ptr, size_t oldsize, size_t newsize)
	210	{
8c8b7284	211	#ifdef __linux__
2446536b	212	void *ret = mremap(ptr, oldsize, newsize, 0);
	213	if (ret == MAP_FAILED)
	214	return NULL;
	215
	216	return ret;
8c8b7284	217	#else
	218	void tmp, ret;
	219	size_t preserve_size;
	220
	221	preserve_size = oldsize;
	222	if (preserve_size > newsize)
	223	preserve_size = newsize;
	224	tmp = malloc(preserve_size);
	225	if (tmp == NULL)
	226	return NULL;
	227	memcpy(tmp, ptr, preserve_size);
	228
	229	munmap(ptr, oldsize);
	230	ret = mmap(ptr, newsize, PROT_READ \| PROT_WRITE,
	231	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	232	if (ret == MAP_FAILED) {
	233	free(tmp);
	234	return NULL;
	235	}
	236	memcpy(ret, tmp, preserve_size);
	237	free(tmp);
	238	return ret;
	239	#endif
2446536b	240	}
	241
	242	void plat_munmap(void *ptr, size_t size)
	243	{
	244	if (ptr != NULL)
	245	munmap(ptr, size);
	246	}
	247
c25d78ee	248	int plat_mem_set_exec(void *ptr, size_t size)
c25d78ee	249	{
e8b61936	250	#ifdef _WIN32
	251	int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
	252	if (ret == 0)
	253	lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
	254	#else
	255	int ret = mprotect(ptr, size, PROT_READ \| PROT_WRITE \| PROT_EXEC);
	256	if (ret != 0)
	257	lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
	258	#endif
c25d78ee	259	return ret;
	260	}
	261
2446536b	262	void emu_video_mode_change(int start_line, int line_count, int is_32cols)
	263	{
	264	memset(vout_buf, 0, 320 * 240 * 2);
	265	vout_width = is_32cols ? 256 : 320;
	266	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
	267	}
	268
	269	void emu_32x_startup(void)
	270	{
2446536b	271	}
	272
	273	#ifndef ANDROID
	274
	275	void lprintf(const char *fmt, ...)
	276	{
	277	va_list list;
	278
	279	va_start(list, fmt);
	280	fprintf(emu_log, "PicoDrive: ");
	281	vfprintf(emu_log, fmt, list);
	282	va_end(list);
	283	fflush(emu_log);
	284	}
	285
	286	#else
	287
	288	#include <android/log.h>
	289
	290	void lprintf(const char *fmt, ...)
	291	{
	292	va_list list;
	293
	294	va_start(list, fmt);
	295	__android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
	296	va_end(list);
	297	}
	298
	299	#endif
	300
	301	/* libretro */
	302	void retro_set_environment(retro_environment_t cb)
	303	{
	304	static const struct retro_variable vars[] = {
	305	//{ "region", "Region; Auto\|NTSC\|PAL" },
	306	{ NULL, NULL },
	307	};
	308
	309	environ_cb = cb;
	310
	311	cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
	312	}
	313
	314	void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
	315	void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
	316	void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
	317	void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
	318	void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
	319
	320	unsigned retro_api_version(void)
	321	{
	322	return RETRO_API_VERSION;
	323	}
	324
	325	void retro_set_controller_port_device(unsigned port, unsigned device)
	326	{
	327	}
	328
	329	void retro_get_system_info(struct retro_system_info *info)
	330	{
	331	memset(info, 0, sizeof(*info));
	332	info->library_name = "PicoDrive";
	333	info->library_version = VERSION;
53b2e51c	334	info->valid_extensions = "bin\|gen\|smd\|md\|32x\|cue\|iso\|sms";
2446536b	335	info->need_fullpath = true;
	336	}
	337
	338	void retro_get_system_av_info(struct retro_system_av_info *info)
	339	{
	340	memset(info, 0, sizeof(*info));
	341	info->timing.fps = Pico.m.pal ? 50 : 60;
	342	info->timing.sample_rate = 44100;
	343	info->geometry.base_width = 320;
	344	info->geometry.base_height = 240;
	345	info->geometry.max_width = VOUT_MAX_WIDTH;
	346	info->geometry.max_height = VOUT_MAX_HEIGHT;
	347	info->geometry.aspect_ratio = 4.0 / 3.0;
	348	}
	349
86b38dc4	350	/* savestates */
	351	struct savestate_state {
	352	const char *load_buf;
	353	char *save_buf;
	354	size_t size;
	355	size_t pos;
	356	};
	357
	358	size_t state_read(void p, size_t size, size_t nmemb, void file)
	359	{
	360	struct savestate_state *state = file;
	361	size_t bsize = size * nmemb;
	362
	363	if (state->pos + bsize > state->size) {
	364	lprintf("savestate error: %u/%u\n",
	365	state->pos + bsize, state->size);
	366	bsize = state->size - state->pos;
	367	if ((int)bsize <= 0)
	368	return 0;
	369	}
	370
	371	memcpy(p, state->load_buf + state->pos, bsize);
	372	state->pos += bsize;
	373	return bsize;
	374	}
	375
	376	size_t state_write(void p, size_t size, size_t nmemb, void file)
	377	{
	378	struct savestate_state *state = file;
	379	size_t bsize = size * nmemb;
	380
	381	if (state->pos + bsize > state->size) {
	382	lprintf("savestate error: %u/%u\n",
	383	state->pos + bsize, state->size);
	384	bsize = state->size - state->pos;
	385	if ((int)bsize <= 0)
	386	return 0;
	387	}
	388
	389	memcpy(state->save_buf + state->pos, p, bsize);
	390	state->pos += bsize;
	391	return bsize;
	392	}
	393
	394	size_t state_skip(void p, size_t size, size_t nmemb, void file)
	395	{
	396	struct savestate_state *state = file;
	397	size_t bsize = size * nmemb;
	398
	399	state->pos += bsize;
	400	return bsize;
	401	}
	402
	403	size_t state_eof(void *file)
	404	{
	405	struct savestate_state *state = file;
	406
	407	return state->pos >= state->size;
	408	}
	409
	410	int state_fseek(void *file, long offset, int whence)
	411	{
	412	struct savestate_state *state = file;
	413
414	switch (whence) {
415	case SEEK_SET:
416	state->pos = offset;
417	break;
418	case SEEK_CUR:
419	state->pos += offset;
420	break;
421	case SEEK_END:
422	state->pos = state->size + offset;
423	break;
424	}
425	return (int)state->pos;
426	}
427
428	/* savestate sizes vary wildly depending if cd/32x or
429	* carthw is active, so run the whole thing to get size */
2446536b	430	size_t retro_serialize_size(void)
2446536b	431	{
86b38dc4	432	struct savestate_state state = { 0, };
	433	int ret;
	434
	435	ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
	436	if (ret != 0)
	437	return 0;
	438
	439	return state.pos;
2446536b	440	}
	441
	442	bool retro_serialize(void *data, size_t size)
	443	{
86b38dc4	444	struct savestate_state state = { 0, };
	445	int ret;
	446
	447	state.save_buf = data;
	448	state.size = size;
	449	state.pos = 0;
	450
	451	ret = PicoStateFP(&state, 1, NULL, state_write,
	452	NULL, state_fseek);
	453	return ret == 0;
2446536b	454	}
	455
	456	bool retro_unserialize(const void *data, size_t size)
	457	{
86b38dc4	458	struct savestate_state state = { 0, };
	459	int ret;
	460
	461	state.load_buf = data;
	462	state.size = size;
	463	state.pos = 0;
	464
	465	ret = PicoStateFP(&state, 0, state_read, NULL,
	466	state_eof, state_fseek);
	467	return ret == 0;
2446536b	468	}
	469
	470	/* cheats - TODO */
	471	void retro_cheat_reset(void)
	472	{
	473	}
	474
	475	void retro_cheat_set(unsigned index, bool enabled, const char *code)
	476	{
	477	}
	478
	479	/* multidisk support */
	480	static bool disk_ejected;
	481	static unsigned int disk_current_index;
	482	static unsigned int disk_count;
	483	static struct disks_state {
	484	char *fname;
	485	} disks[8];
	486
	487	static bool disk_set_eject_state(bool ejected)
	488	{
	489	// TODO?
	490	disk_ejected = ejected;
	491	return true;
	492	}
	493
	494	static bool disk_get_eject_state(void)
	495	{
	496	return disk_ejected;
	497	}
	498
	499	static unsigned int disk_get_image_index(void)
	500	{
	501	return disk_current_index;
	502	}
	503
	504	static bool disk_set_image_index(unsigned int index)
	505	{
	506	cd_img_type cd_type;
	507	int ret;
	508
	509	if (index >= sizeof(disks) / sizeof(disks[0]))
	510	return false;
	511
	512	if (disks[index].fname == NULL) {
	513	lprintf("missing disk #%u\n", index);
	514
	515	// RetroArch specifies "no disk" with index == count,
	516	// so don't fail here..
	517	disk_current_index = index;
	518	return true;
	519	}
	520
	521	lprintf("switching to disk %u: \"%s\"\n", index,
	522	disks[index].fname);
	523
	524	ret = -1;
	525	cd_type = PicoCdCheck(disks[index].fname, NULL);
	526	if (cd_type != CIT_NOT_CD)
	527	ret = Insert_CD(disks[index].fname, cd_type);
	528	if (ret != 0) {
	529	lprintf("Load failed, invalid CD image?\n");
	530	return 0;
	531	}
532
533	disk_current_index = index;
534	return true;
535	}
536
537	static unsigned int disk_get_num_images(void)
538	{
539	return disk_count;
540	}
541
542	static bool disk_replace_image_index(unsigned index,
543	const struct retro_game_info *info)
544	{
545	bool ret = true;
546
547	if (index >= sizeof(disks) / sizeof(disks[0]))
548	return false;
549
550	if (disks[index].fname != NULL)
551	free(disks[index].fname);
552	disks[index].fname = NULL;
553
554	if (info != NULL) {
555	disks[index].fname = strdup(info->path);
556	if (index == disk_current_index)
557	ret = disk_set_image_index(index);
558	}
559
560	return ret;
561	}
562
563	static bool disk_add_image_index(void)
564	{
565	if (disk_count >= sizeof(disks) / sizeof(disks[0]))
566	return false;
567
568	disk_count++;
569	return true;
570	}
571
572	static struct retro_disk_control_callback disk_control = {
573	.set_eject_state = disk_set_eject_state,
574	.get_eject_state = disk_get_eject_state,
575	.get_image_index = disk_get_image_index,
576	.set_image_index = disk_set_image_index,
577	.get_num_images = disk_get_num_images,
578	.replace_image_index = disk_replace_image_index,
579	.add_image_index = disk_add_image_index,
580	};
581
582	static void disk_tray_open(void)
583	{
584	lprintf("cd tray open\n");
585	disk_ejected = 1;
586	}
587
588	static void disk_tray_close(void)
589	{
590	lprintf("cd tray close\n");
591	disk_ejected = 0;
592	}
593
594
595	static const char * const biosfiles_us[] = {
596	"us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
597	};
598	static const char * const biosfiles_eu[] = {
599	"eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
600	};
601	static const char * const biosfiles_jp[] = {
602	"jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
603	};
604
605	static void make_system_path(char *buf, size_t buf_size,
606	const char name, const char ext)
607	{
608	const char *dir = NULL;
609
610	if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
611	snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
612	}
613	else {
614	snprintf(buf, buf_size, "%s%s", name, ext);
615	}
616	}
617
618	static const char find_bios(int region, const char *cd_fname)
619	{
620	const char * const *files;
621	static char path[256];
622	int i, count;
623	FILE *f = NULL;
624
625	if (*region == 4) { // US
626	files = biosfiles_us;
627	count = sizeof(biosfiles_us) / sizeof(char *);
628	} else if (*region == 8) { // EU
629	files = biosfiles_eu;
630	count = sizeof(biosfiles_eu) / sizeof(char *);
631	} else if (region == 1 \|\| region == 2) {
632	files = biosfiles_jp;
633	count = sizeof(biosfiles_jp) / sizeof(char *);
634	} else {
635	return NULL;
636	}
637
638	for (i = 0; i < count; i++)
639	{
640	make_system_path(path, sizeof(path), files[i], ".bin");
641	f = fopen(path, "rb");
642	if (f != NULL)
643	break;
644
645	make_system_path(path, sizeof(path), files[i], ".zip");
646	f = fopen(path, "rb");
647	if (f != NULL)
648	break;
649	}
650
651	if (f != NULL) {
652	lprintf("using bios: %s\n", path);
653	fclose(f);
654	return path;
655	}
656
657	return NULL;
658	}
659
660	bool retro_load_game(const struct retro_game_info *info)
661	{
662	enum media_type_e media_type;
663	static char carthw_path[256];
664	size_t i;
665
666	enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
667	if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
668	lprintf("RGB565 suppot required, sorry\n");
669	return false;
670	}
671
672	if (info == NULL \|\| info->path == NULL) {
673	lprintf("info->path required\n");
674	return false;
675	}
676
677	for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
678	if (disks[i].fname != NULL) {
679	free(disks[i].fname);
680	disks[i].fname = NULL;
681	}
682	}
683
684	disk_current_index = 0;
685	disk_count = 1;
686	disks[0].fname = strdup(info->path);
687
688	make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
689
690	media_type = PicoLoadMedia(info->path, carthw_path,
691	find_bios, NULL);
692
693	switch (media_type) {
694	case PM_BAD_DETECT:
695	lprintf("Failed to detect ROM/CD image type.\n");
696	return false;
697	case PM_BAD_CD:
698	lprintf("Invalid CD image\n");
699	return false;
700	case PM_BAD_CD_NO_BIOS:
701	lprintf("Missing BIOS\n");
702	return false;
703	case PM_ERROR:
704	lprintf("Load error\n");
705	return false;
706	default:
707	break;
708	}
709
710	PicoLoopPrepare();
711
712	PicoWriteSound = snd_write;
713	memset(sndBuffer, 0, sizeof(sndBuffer));
714	PsndOut = sndBuffer;
715	PsndRerate(1);
716
717	return true;
718	}
719
720	bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
721	{
722	return false;
723	}
724
725	void retro_unload_game(void)
726	{
727	}
728
729	unsigned retro_get_region(void)
730	{
731	return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
732	}
733
734	void *retro_get_memory_data(unsigned id)
735	{
736	if (id != RETRO_MEMORY_SAVE_RAM)
737	return NULL;
738
739	if (PicoAHW & PAHW_MCD)
740	return Pico_mcd->bram;
741	else
742	return SRam.data;
743	}
744
745	size_t retro_get_memory_size(unsigned id)
746	{
747	if (id != RETRO_MEMORY_SAVE_RAM)
748	return 0;
749
750	if (PicoAHW & PAHW_MCD)
751	// bram
752	return 0x2000;
753	else
754	return SRam.size;
755	}
756
757	void retro_reset(void)
758	{
759	PicoReset();
760	}
761
762	static const unsigned short retro_pico_map[] = {
763	[RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
764	[RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
765	[RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
766	[RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
767	[RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
768	[RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
769	[RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
770	[RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
771	[RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
772	[RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
773	[RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
774	[RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
775	};
776	#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
777
778	static void snd_write(int len)
779	{
780	audio_batch_cb(PsndOut, len / 4);
781	}
782
783	void retro_run(void)
784	{
785	bool updated = false;
786	int pad, i;
787
788	if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
789	; //update_variables(true);
790
791	input_poll_cb();
792
793	PicoPad[0] = PicoPad[1] = 0;
794	for (pad = 0; pad < 2; pad++)
795	for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
796	if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
797	PicoPad[pad] \|= retro_pico_map[i];
798
799	PicoFrame();
800
801	video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
802	}
803
804	void retro_init(void)
805	{
806	int level;
807
808	#ifdef IOS
809	emu_log = fopen("/User/Documents/PicoDrive.log", "w");
810	if (emu_log == NULL)
811	emu_log = fopen("PicoDrive.log", "w");
812	if (emu_log == NULL)
813	#endif
814	emu_log = stdout;
815
816	level = 0;
817	environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
818
819	environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
820
821	PicoOpt = POPT_EN_STEREO\|POPT_EN_FM\|POPT_EN_PSG\|POPT_EN_Z80
720bfc5d	822	\| POPT_EN_MCD_PCM\|POPT_EN_MCD_CDDA\|POPT_EN_MCD_GFX
	823	\| POPT_EN_32X\|POPT_EN_PWM
	824	\| POPT_ACC_SPRITES\|POPT_DIS_32C_BORDER;
	825	#ifdef __arm__
	826	PicoOpt \|= POPT_EN_SVP_DRC;
	827	#endif
2446536b	828	PsndRate = 44100;
	829	PicoAutoRgnOrder = 0x184; // US, EU, JP
	830	PicoCDBuffers = 0;
	831
2446536b	832	vout_width = 320;
	833	vout_height = 240;
	834	vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
	835
	836	PicoInit();
41946d70	837	PicoDrawSetOutFormat(PDF_RGB555, 0);
2446536b	838	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
	839
	840	//PicoMessage = plat_status_msg_busy_next;
	841	PicoMCDopenTray = disk_tray_open;
	842	PicoMCDcloseTray = disk_tray_close;
	843	}
	844
	845	void retro_deinit(void)
	846	{
	847	PicoExit();
	848	}