[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"

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

#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif

void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
{
   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;
      }
   }

	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
	31	static retro_video_refresh_t video_cb;
	32	static retro_input_poll_t input_poll_cb;
	33	static retro_input_state_t input_state_cb;
	34	static retro_environment_t environ_cb;
	35	static retro_audio_sample_batch_t audio_batch_cb;
	36
	37	static FILE *emu_log;
	38
	39	#define VOUT_MAX_WIDTH 320
	40	#define VOUT_MAX_HEIGHT 240
	41	static void *vout_buf;
	42	static int vout_width, vout_height;
	43
	44	static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
	45
2446536b	46	static void snd_write(int len);
	47
	48	#ifdef _WIN32
	49	#define SLASH '\\'
	50	#else
	51	#define SLASH '/'
	52	#endif
	53
	54	/* functions called by the core */
	55
	56	void cache_flush_d_inval_i(void start, void end)
	57	{
	58	#ifdef __arm__
	59	#if defined(__BLACKBERRY_QNX__)
	60	msync(start, end - start, MS_SYNC \| MS_CACHE_ONLY \| MS_INVALIDATE_ICACHE);
	61	#elif defined(__MACH__)
	62	size_t len = (char )end - (char )start;
	63	sys_dcache_flush(start, len);
	64	sys_icache_invalidate(start, len);
	65	#else
	66	__clear_cache(start, end);
	67	#endif
	68	#endif
	69	}
	70
e8b61936	71	#ifdef _WIN32
6f1133bc T	72	/* mmap() replacement for Windows
	73	*
	74	* Author: Mike Frysinger <vapier@gentoo.org>
	75	* Placed into the public domain
	76	*/
	77
	78	/* References:
	79	* CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
	80	* CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
	81	* MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
	82	* UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
	83	*/
	84
	85	#define PROT_READ 0x1
	86	#define PROT_WRITE 0x2
	87	/* This flag is only available in WinXP+ */
	88	#ifdef FILE_MAP_EXECUTE
	89	#define PROT_EXEC 0x4
	90	#else
	91	#define PROT_EXEC 0x0
	92	#define FILE_MAP_EXECUTE 0
	93	#endif
	94
	95	#define MAP_SHARED 0x01
	96	#define MAP_PRIVATE 0x02
	97	#define MAP_ANONYMOUS 0x20
	98	#define MAP_ANON MAP_ANONYMOUS
	99	#define MAP_FAILED ((void *) -1)
	100
	101	#ifdef __USE_FILE_OFFSET64
	102	# define DWORD_HI(x) (x >> 32)
	103	# define DWORD_LO(x) ((x) & 0xffffffff)
	104	#else
	105	# define DWORD_HI(x) (0)
	106	# define DWORD_LO(x) (x)
	107	#endif
	108
	109	static void mmap(void start, size_t length, int prot, int flags, int fd, off_t offset)
2446536b	110	{
6f1133bc T	111	if (prot & ~(PROT_READ \| PROT_WRITE \| PROT_EXEC))
	112	return MAP_FAILED;
	113	if (fd == -1) {
	114	if (!(flags & MAP_ANON) \|\| offset)
	115	return MAP_FAILED;
	116	} else if (flags & MAP_ANON)
	117	return MAP_FAILED;
	118
	119	DWORD flProtect;
	120	if (prot & PROT_WRITE) {
	121	if (prot & PROT_EXEC)
	122	flProtect = PAGE_EXECUTE_READWRITE;
	123	else
	124	flProtect = PAGE_READWRITE;
	125	} else if (prot & PROT_EXEC) {
	126	if (prot & PROT_READ)
	127	flProtect = PAGE_EXECUTE_READ;
	128	else if (prot & PROT_EXEC)
	129	flProtect = PAGE_EXECUTE;
	130	} else
	131	flProtect = PAGE_READONLY;
	132
	133	off_t end = length + offset;
	134	HANDLE mmap_fd, h;
	135	if (fd == -1)
	136	mmap_fd = INVALID_HANDLE_VALUE;
	137	else
	138	mmap_fd = (HANDLE)_get_osfhandle(fd);
	139	h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
	140	if (h == NULL)
	141	return MAP_FAILED;
	142
	143	DWORD dwDesiredAccess;
	144	if (prot & PROT_WRITE)
	145	dwDesiredAccess = FILE_MAP_WRITE;
	146	else
	147	dwDesiredAccess = FILE_MAP_READ;
	148	if (prot & PROT_EXEC)
	149	dwDesiredAccess \|= FILE_MAP_EXECUTE;
	150	if (flags & MAP_PRIVATE)
	151	dwDesiredAccess \|= FILE_MAP_COPY;
	152	void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
	153	if (ret == NULL) {
	154	CloseHandle(h);
	155	ret = MAP_FAILED;
	156	}
	157	return ret;
e8b61936	158	}
2446536b	159
6f1133bc	160	static void munmap(void *addr, size_t length)
e8b61936	161	{
6f1133bc T	162	UnmapViewOfFile(addr);
6f1133bc T	163	/* ruh-ro, we leaked handle from CreateFileMapping() ... */
e8b61936	164	}
e8b61936	165	#endif
8e5639bc	166
	167	#ifndef MAP_ANONYMOUS
	168	#define MAP_ANONYMOUS MAP_ANON
	169	#endif
	170
e8b61936	171	void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
e8b61936	172	{
e8b61936	173	int flags = MAP_PRIVATE \| MAP_ANONYMOUS;
	174	void req, ret;
	175
	176	req = (void *)addr;
	177	ret = mmap(req, size, PROT_READ \| PROT_WRITE, flags, -1, 0);
	178	if (ret == MAP_FAILED) {
	179	lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
	180	return NULL;
	181	}
	182
	183	if (addr != 0 && ret != (void *)addr) {
	184	lprintf("warning: wanted to map @%08lx, got %p\n",
	185	addr, ret);
	186
	187	if (is_fixed) {
	188	munmap(ret, size);
	189	return NULL;
	190	}
	191	}
2446536b	192
	193	return ret;
	194	}
	195
	196	void plat_mremap(void ptr, size_t oldsize, size_t newsize)
	197	{
8c8b7284	198	#ifdef __linux__
2446536b	199	void *ret = mremap(ptr, oldsize, newsize, 0);
	200	if (ret == MAP_FAILED)
	201	return NULL;
	202
	203	return ret;
8c8b7284	204	#else
	205	void tmp, ret;
	206	size_t preserve_size;
	207
	208	preserve_size = oldsize;
	209	if (preserve_size > newsize)
	210	preserve_size = newsize;
	211	tmp = malloc(preserve_size);
	212	if (tmp == NULL)
	213	return NULL;
	214	memcpy(tmp, ptr, preserve_size);
	215
	216	munmap(ptr, oldsize);
	217	ret = mmap(ptr, newsize, PROT_READ \| PROT_WRITE,
	218	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	219	if (ret == MAP_FAILED) {
	220	free(tmp);
	221	return NULL;
	222	}
	223	memcpy(ret, tmp, preserve_size);
	224	free(tmp);
	225	return ret;
	226	#endif
2446536b	227	}
	228
	229	void plat_munmap(void *ptr, size_t size)
	230	{
	231	if (ptr != NULL)
	232	munmap(ptr, size);
	233	}
	234
c25d78ee	235	int plat_mem_set_exec(void *ptr, size_t size)
c25d78ee	236	{
e8b61936	237	#ifdef _WIN32
	238	int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
	239	if (ret == 0)
	240	lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
	241	#else
	242	int ret = mprotect(ptr, size, PROT_READ \| PROT_WRITE \| PROT_EXEC);
	243	if (ret != 0)
	244	lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
	245	#endif
c25d78ee	246	return ret;
	247	}
	248
2446536b	249	void emu_video_mode_change(int start_line, int line_count, int is_32cols)
	250	{
	251	memset(vout_buf, 0, 320 * 240 * 2);
	252	vout_width = is_32cols ? 256 : 320;
	253	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
	254	}
	255
	256	void emu_32x_startup(void)
	257	{
2446536b	258	}
	259
	260	#ifndef ANDROID
	261
	262	void lprintf(const char *fmt, ...)
	263	{
	264	va_list list;
	265
	266	va_start(list, fmt);
	267	fprintf(emu_log, "PicoDrive: ");
	268	vfprintf(emu_log, fmt, list);
	269	va_end(list);
	270	fflush(emu_log);
	271	}
	272
	273	#else
	274
	275	#include <android/log.h>
	276
	277	void lprintf(const char *fmt, ...)
	278	{
	279	va_list list;
	280
	281	va_start(list, fmt);
	282	__android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
	283	va_end(list);
	284	}
	285
	286	#endif
	287
	288	/* libretro */
	289	void retro_set_environment(retro_environment_t cb)
	290	{
	291	static const struct retro_variable vars[] = {
	292	//{ "region", "Region; Auto\|NTSC\|PAL" },
	293	{ NULL, NULL },
	294	};
	295
	296	environ_cb = cb;
	297
	298	cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
	299	}
	300
	301	void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
	302	void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
	303	void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
	304	void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
	305	void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
	306
	307	unsigned retro_api_version(void)
	308	{
	309	return RETRO_API_VERSION;
	310	}
	311
	312	void retro_set_controller_port_device(unsigned port, unsigned device)
	313	{
	314	}
	315
	316	void retro_get_system_info(struct retro_system_info *info)
	317	{
	318	memset(info, 0, sizeof(*info));
	319	info->library_name = "PicoDrive";
	320	info->library_version = VERSION;
53b2e51c	321	info->valid_extensions = "bin\|gen\|smd\|md\|32x\|cue\|iso\|sms";
2446536b	322	info->need_fullpath = true;
	323	}
	324
	325	void retro_get_system_av_info(struct retro_system_av_info *info)
	326	{
	327	memset(info, 0, sizeof(*info));
	328	info->timing.fps = Pico.m.pal ? 50 : 60;
	329	info->timing.sample_rate = 44100;
	330	info->geometry.base_width = 320;
	331	info->geometry.base_height = 240;
	332	info->geometry.max_width = VOUT_MAX_WIDTH;
	333	info->geometry.max_height = VOUT_MAX_HEIGHT;
	334	info->geometry.aspect_ratio = 4.0 / 3.0;
	335	}
	336
86b38dc4	337	/* savestates */
	338	struct savestate_state {
	339	const char *load_buf;
	340	char *save_buf;
	341	size_t size;
	342	size_t pos;
	343	};
	344
	345	size_t state_read(void p, size_t size, size_t nmemb, void file)
	346	{
	347	struct savestate_state *state = file;
	348	size_t bsize = size * nmemb;
	349
	350	if (state->pos + bsize > state->size) {
	351	lprintf("savestate error: %u/%u\n",
	352	state->pos + bsize, state->size);
	353	bsize = state->size - state->pos;
	354	if ((int)bsize <= 0)
	355	return 0;
	356	}
	357
	358	memcpy(p, state->load_buf + state->pos, bsize);
	359	state->pos += bsize;
	360	return bsize;
	361	}
	362
	363	size_t state_write(void p, size_t size, size_t nmemb, void file)
	364	{
	365	struct savestate_state *state = file;
	366	size_t bsize = size * nmemb;
	367
	368	if (state->pos + bsize > state->size) {
	369	lprintf("savestate error: %u/%u\n",
	370	state->pos + bsize, state->size);
	371	bsize = state->size - state->pos;
	372	if ((int)bsize <= 0)
	373	return 0;
	374	}
	375
	376	memcpy(state->save_buf + state->pos, p, bsize);
	377	state->pos += bsize;
	378	return bsize;
	379	}
	380
	381	size_t state_skip(void p, size_t size, size_t nmemb, void file)
	382	{
	383	struct savestate_state *state = file;
	384	size_t bsize = size * nmemb;
	385
	386	state->pos += bsize;
	387	return bsize;
	388	}
	389
	390	size_t state_eof(void *file)
	391	{
	392	struct savestate_state *state = file;
	393
	394	return state->pos >= state->size;
	395	}
	396
	397	int state_fseek(void *file, long offset, int whence)
	398	{
	399	struct savestate_state *state = file;
	400
401	switch (whence) {
402	case SEEK_SET:
403	state->pos = offset;
404	break;
405	case SEEK_CUR:
406	state->pos += offset;
407	break;
408	case SEEK_END:
409	state->pos = state->size + offset;
410	break;
411	}
412	return (int)state->pos;
413	}
414
415	/* savestate sizes vary wildly depending if cd/32x or
416	* carthw is active, so run the whole thing to get size */
2446536b	417	size_t retro_serialize_size(void)
2446536b	418	{
86b38dc4	419	struct savestate_state state = { 0, };
	420	int ret;
	421
	422	ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
	423	if (ret != 0)
	424	return 0;
	425
	426	return state.pos;
2446536b	427	}
	428
	429	bool retro_serialize(void *data, size_t size)
	430	{
86b38dc4	431	struct savestate_state state = { 0, };
	432	int ret;
	433
	434	state.save_buf = data;
	435	state.size = size;
	436	state.pos = 0;
	437
	438	ret = PicoStateFP(&state, 1, NULL, state_write,
	439	NULL, state_fseek);
	440	return ret == 0;
2446536b	441	}
	442
	443	bool retro_unserialize(const void *data, size_t size)
	444	{
86b38dc4	445	struct savestate_state state = { 0, };
	446	int ret;
	447
	448	state.load_buf = data;
	449	state.size = size;
	450	state.pos = 0;
	451
	452	ret = PicoStateFP(&state, 0, state_read, NULL,
	453	state_eof, state_fseek);
	454	return ret == 0;
2446536b	455	}
	456
	457	/* cheats - TODO */
	458	void retro_cheat_reset(void)
	459	{
	460	}
	461
	462	void retro_cheat_set(unsigned index, bool enabled, const char *code)
	463	{
	464	}
	465
	466	/* multidisk support */
	467	static bool disk_ejected;
	468	static unsigned int disk_current_index;
	469	static unsigned int disk_count;
	470	static struct disks_state {
	471	char *fname;
	472	} disks[8];
	473
	474	static bool disk_set_eject_state(bool ejected)
	475	{
	476	// TODO?
	477	disk_ejected = ejected;
	478	return true;
	479	}
	480
	481	static bool disk_get_eject_state(void)
	482	{
	483	return disk_ejected;
	484	}
	485
	486	static unsigned int disk_get_image_index(void)
	487	{
	488	return disk_current_index;
	489	}
	490
	491	static bool disk_set_image_index(unsigned int index)
	492	{
	493	cd_img_type cd_type;
	494	int ret;
	495
	496	if (index >= sizeof(disks) / sizeof(disks[0]))
	497	return false;
	498
	499	if (disks[index].fname == NULL) {
	500	lprintf("missing disk #%u\n", index);
	501
	502	// RetroArch specifies "no disk" with index == count,
	503	// so don't fail here..
	504	disk_current_index = index;
	505	return true;
	506	}
	507
	508	lprintf("switching to disk %u: \"%s\"\n", index,
	509	disks[index].fname);
	510
	511	ret = -1;
	512	cd_type = PicoCdCheck(disks[index].fname, NULL);
	513	if (cd_type != CIT_NOT_CD)
	514	ret = Insert_CD(disks[index].fname, cd_type);
	515	if (ret != 0) {
	516	lprintf("Load failed, invalid CD image?\n");
	517	return 0;
	518	}
519
520	disk_current_index = index;
521	return true;
522	}
523
524	static unsigned int disk_get_num_images(void)
525	{
526	return disk_count;
527	}
528
529	static bool disk_replace_image_index(unsigned index,
530	const struct retro_game_info *info)
531	{
532	bool ret = true;
533
534	if (index >= sizeof(disks) / sizeof(disks[0]))
535	return false;
536
537	if (disks[index].fname != NULL)
538	free(disks[index].fname);
539	disks[index].fname = NULL;
540
541	if (info != NULL) {
542	disks[index].fname = strdup(info->path);
543	if (index == disk_current_index)
544	ret = disk_set_image_index(index);
545	}
546
547	return ret;
548	}
549
550	static bool disk_add_image_index(void)
551	{
552	if (disk_count >= sizeof(disks) / sizeof(disks[0]))
553	return false;
554
555	disk_count++;
556	return true;
557	}
558
559	static struct retro_disk_control_callback disk_control = {
560	.set_eject_state = disk_set_eject_state,
561	.get_eject_state = disk_get_eject_state,
562	.get_image_index = disk_get_image_index,
563	.set_image_index = disk_set_image_index,
564	.get_num_images = disk_get_num_images,
565	.replace_image_index = disk_replace_image_index,
566	.add_image_index = disk_add_image_index,
567	};
568
569	static void disk_tray_open(void)
570	{
571	lprintf("cd tray open\n");
572	disk_ejected = 1;
573	}
574
575	static void disk_tray_close(void)
576	{
577	lprintf("cd tray close\n");
578	disk_ejected = 0;
579	}
580
581
582	static const char * const biosfiles_us[] = {
583	"us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
584	};
585	static const char * const biosfiles_eu[] = {
586	"eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
587	};
588	static const char * const biosfiles_jp[] = {
589	"jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
590	};
591
592	static void make_system_path(char *buf, size_t buf_size,
593	const char name, const char ext)
594	{
595	const char *dir = NULL;
596
597	if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
598	snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
599	}
600	else {
601	snprintf(buf, buf_size, "%s%s", name, ext);
602	}
603	}
604
605	static const char find_bios(int region, const char *cd_fname)
606	{
607	const char * const *files;
608	static char path[256];
609	int i, count;
610	FILE *f = NULL;
611
612	if (*region == 4) { // US
613	files = biosfiles_us;
614	count = sizeof(biosfiles_us) / sizeof(char *);
615	} else if (*region == 8) { // EU
616	files = biosfiles_eu;
617	count = sizeof(biosfiles_eu) / sizeof(char *);
618	} else if (region == 1 \|\| region == 2) {
619	files = biosfiles_jp;
620	count = sizeof(biosfiles_jp) / sizeof(char *);
621	} else {
622	return NULL;
623	}
624
625	for (i = 0; i < count; i++)
626	{
627	make_system_path(path, sizeof(path), files[i], ".bin");
628	f = fopen(path, "rb");
629	if (f != NULL)
630	break;
631
632	make_system_path(path, sizeof(path), files[i], ".zip");
633	f = fopen(path, "rb");
634	if (f != NULL)
635	break;
636	}
637
638	if (f != NULL) {
639	lprintf("using bios: %s\n", path);
640	fclose(f);
641	return path;
642	}
643
644	return NULL;
645	}
646
647	bool retro_load_game(const struct retro_game_info *info)
648	{
649	enum media_type_e media_type;
650	static char carthw_path[256];
651	size_t i;
652
653	enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
654	if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
655	lprintf("RGB565 suppot required, sorry\n");
656	return false;
657	}
658
659	if (info == NULL \|\| info->path == NULL) {
660	lprintf("info->path required\n");
661	return false;
662	}
663
664	for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
665	if (disks[i].fname != NULL) {
666	free(disks[i].fname);
667	disks[i].fname = NULL;
668	}
669	}
670
671	disk_current_index = 0;
672	disk_count = 1;
673	disks[0].fname = strdup(info->path);
674
675	make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
676
677	media_type = PicoLoadMedia(info->path, carthw_path,
678	find_bios, NULL);
679
680	switch (media_type) {
681	case PM_BAD_DETECT:
682	lprintf("Failed to detect ROM/CD image type.\n");
683	return false;
684	case PM_BAD_CD:
685	lprintf("Invalid CD image\n");
686	return false;
687	case PM_BAD_CD_NO_BIOS:
688	lprintf("Missing BIOS\n");
689	return false;
690	case PM_ERROR:
691	lprintf("Load error\n");
692	return false;
693	default:
694	break;
695	}
696
697	PicoLoopPrepare();
698
699	PicoWriteSound = snd_write;
700	memset(sndBuffer, 0, sizeof(sndBuffer));
701	PsndOut = sndBuffer;
702	PsndRerate(1);
703
704	return true;
705	}
706
707	bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
708	{
709	return false;
710	}
711
712	void retro_unload_game(void)
713	{
714	}
715
716	unsigned retro_get_region(void)
717	{
718	return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
719	}
720
721	void *retro_get_memory_data(unsigned id)
722	{
723	if (id != RETRO_MEMORY_SAVE_RAM)
724	return NULL;
725
726	if (PicoAHW & PAHW_MCD)
727	return Pico_mcd->bram;
728	else
729	return SRam.data;
730	}
731
732	size_t retro_get_memory_size(unsigned id)
733	{
734	if (id != RETRO_MEMORY_SAVE_RAM)
735	return 0;
736
737	if (PicoAHW & PAHW_MCD)
738	// bram
739	return 0x2000;
740	else
741	return SRam.size;
742	}
743
744	void retro_reset(void)
745	{
746	PicoReset();
747	}
748
749	static const unsigned short retro_pico_map[] = {
750	[RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
751	[RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
752	[RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
753	[RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
754	[RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
755	[RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
756	[RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
757	[RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
758	[RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
759	[RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
760	[RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
761	[RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
762	};
763	#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
764
765	static void snd_write(int len)
766	{
767	audio_batch_cb(PsndOut, len / 4);
768	}
769
770	void retro_run(void)
771	{
772	bool updated = false;
773	int pad, i;
774
775	if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
776	; //update_variables(true);
777
778	input_poll_cb();
779
780	PicoPad[0] = PicoPad[1] = 0;
781	for (pad = 0; pad < 2; pad++)
782	for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
783	if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
784	PicoPad[pad] \|= retro_pico_map[i];
785
786	PicoFrame();
787
788	video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
789	}
790
791	void retro_init(void)
792	{
793	int level;
794
795	#ifdef IOS
796	emu_log = fopen("/User/Documents/PicoDrive.log", "w");
797	if (emu_log == NULL)
798	emu_log = fopen("PicoDrive.log", "w");
799	if (emu_log == NULL)
800	#endif
801	emu_log = stdout;
802
803	level = 0;
804	environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
805
806	environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
807
808	PicoOpt = POPT_EN_STEREO\|POPT_EN_FM\|POPT_EN_PSG\|POPT_EN_Z80
720bfc5d	809	\| POPT_EN_MCD_PCM\|POPT_EN_MCD_CDDA\|POPT_EN_MCD_GFX
	810	\| POPT_EN_32X\|POPT_EN_PWM
	811	\| POPT_ACC_SPRITES\|POPT_DIS_32C_BORDER;
	812	#ifdef __arm__
	813	PicoOpt \|= POPT_EN_SVP_DRC;
	814	#endif
2446536b	815	PsndRate = 44100;
	816	PicoAutoRgnOrder = 0x184; // US, EU, JP
	817	PicoCDBuffers = 0;
	818
2446536b	819	vout_width = 320;
	820	vout_height = 240;
	821	vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
	822
	823	PicoInit();
41946d70	824	PicoDrawSetOutFormat(PDF_RGB555, 0);
2446536b	825	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
	826
	827	//PicoMessage = plat_status_msg_busy_next;
	828	PicoMCDopenTray = disk_tray_open;
	829	PicoMCDcloseTray = disk_tray_close;
	830	}
	831
	832	void retro_deinit(void)
	833	{
	834	PicoExit();
	835	}