[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>
#include <sys/mman.h>
#include <errno.h>
#ifdef __MACH__
#include <libkern/OSCacheControl.h>
#endif

#include <pico/pico_int.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
}

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)
{
	int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
	if (ret != 0)
		lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);

	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 - TODO */
size_t retro_serialize_size(void) 
{ 
       return 0;
}

bool retro_serialize(void *data, size_t size)
{ 
       return false;
}

bool retro_unserialize(const void *data, size_t size)
{
       return false;
}

/* 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>
	13	#include <sys/mman.h>
c25d78ee	14	#include <errno.h>
2446536b	15	#ifdef __MACH__
	16	#include <libkern/OSCacheControl.h>
	17	#endif
	18
	19	#include <pico/pico_int.h>
	20	#include "common/input_pico.h"
	21	#include "common/version.h"
	22	#include "libretro.h"
	23
8c8b7284	24	#ifndef MAP_ANONYMOUS
	25	#define MAP_ANONYMOUS MAP_ANON
	26	#endif
	27
2446536b	28	static retro_video_refresh_t video_cb;
	29	static retro_input_poll_t input_poll_cb;
	30	static retro_input_state_t input_state_cb;
	31	static retro_environment_t environ_cb;
	32	static retro_audio_sample_batch_t audio_batch_cb;
	33
	34	static FILE *emu_log;
	35
	36	#define VOUT_MAX_WIDTH 320
	37	#define VOUT_MAX_HEIGHT 240
	38	static void *vout_buf;
	39	static int vout_width, vout_height;
	40
	41	static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
	42
2446536b	43	static void snd_write(int len);
	44
	45	#ifdef _WIN32
	46	#define SLASH '\\'
	47	#else
	48	#define SLASH '/'
	49	#endif
	50
	51	/* functions called by the core */
	52
	53	void cache_flush_d_inval_i(void start, void end)
	54	{
	55	#ifdef __arm__
	56	#if defined(__BLACKBERRY_QNX__)
	57	msync(start, end - start, MS_SYNC \| MS_CACHE_ONLY \| MS_INVALIDATE_ICACHE);
	58	#elif defined(__MACH__)
	59	size_t len = (char )end - (char )start;
	60	sys_dcache_flush(start, len);
	61	sys_icache_invalidate(start, len);
	62	#else
	63	__clear_cache(start, end);
	64	#endif
	65	#endif
	66	}
	67
	68	void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
	69	{
	70	int flags = MAP_PRIVATE \| MAP_ANONYMOUS;
	71	void req, ret;
	72
	73	req = (void *)addr;
	74	ret = mmap(req, size, PROT_READ \| PROT_WRITE, flags, -1, 0);
c25d78ee	75	if (ret == MAP_FAILED) {
c25d78ee	76	lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
2446536b	77	return NULL;
c25d78ee	78	}
2446536b	79
	80	if (addr != 0 && ret != (void *)addr) {
	81	lprintf("warning: wanted to map @%08lx, got %p\n",
	82	addr, ret);
	83
	84	if (is_fixed) {
	85	munmap(ret, size);
	86	return NULL;
	87	}
	88	}
	89
	90	return ret;
	91	}
	92
	93	void plat_mremap(void ptr, size_t oldsize, size_t newsize)
	94	{
8c8b7284	95	#ifdef __linux__
2446536b	96	void *ret = mremap(ptr, oldsize, newsize, 0);
	97	if (ret == MAP_FAILED)
	98	return NULL;
	99
	100	return ret;
8c8b7284	101	#else
	102	void tmp, ret;
	103	size_t preserve_size;
	104
	105	preserve_size = oldsize;
	106	if (preserve_size > newsize)
	107	preserve_size = newsize;
	108	tmp = malloc(preserve_size);
	109	if (tmp == NULL)
	110	return NULL;
	111	memcpy(tmp, ptr, preserve_size);
	112
	113	munmap(ptr, oldsize);
	114	ret = mmap(ptr, newsize, PROT_READ \| PROT_WRITE,
	115	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	116	if (ret == MAP_FAILED) {
	117	free(tmp);
	118	return NULL;
	119	}
	120	memcpy(ret, tmp, preserve_size);
	121	free(tmp);
	122	return ret;
	123	#endif
2446536b	124	}
	125
	126	void plat_munmap(void *ptr, size_t size)
	127	{
	128	if (ptr != NULL)
	129	munmap(ptr, size);
	130	}
	131
c25d78ee	132	int plat_mem_set_exec(void *ptr, size_t size)
	133	{
	134	int ret = mprotect(ptr, size, PROT_READ \| PROT_WRITE \| PROT_EXEC);
	135	if (ret != 0)
	136	lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
	137
	138	return ret;
	139	}
	140
2446536b	141	void emu_video_mode_change(int start_line, int line_count, int is_32cols)
	142	{
	143	memset(vout_buf, 0, 320 * 240 * 2);
	144	vout_width = is_32cols ? 256 : 320;
	145	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
	146	}
	147
	148	void emu_32x_startup(void)
	149	{
2446536b	150	}
	151
	152	#ifndef ANDROID
	153
	154	void lprintf(const char *fmt, ...)
	155	{
	156	va_list list;
	157
	158	va_start(list, fmt);
	159	fprintf(emu_log, "PicoDrive: ");
	160	vfprintf(emu_log, fmt, list);
	161	va_end(list);
	162	fflush(emu_log);
	163	}
	164
	165	#else
	166
	167	#include <android/log.h>
	168
	169	void lprintf(const char *fmt, ...)
	170	{
	171	va_list list;
	172
	173	va_start(list, fmt);
	174	__android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
	175	va_end(list);
	176	}
	177
	178	#endif
	179
	180	/* libretro */
	181	void retro_set_environment(retro_environment_t cb)
	182	{
	183	static const struct retro_variable vars[] = {
	184	//{ "region", "Region; Auto\|NTSC\|PAL" },
	185	{ NULL, NULL },
	186	};
	187
	188	environ_cb = cb;
	189
	190	cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
	191	}
	192
	193	void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
	194	void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
	195	void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
	196	void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
	197	void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
	198
	199	unsigned retro_api_version(void)
	200	{
	201	return RETRO_API_VERSION;
	202	}
	203
	204	void retro_set_controller_port_device(unsigned port, unsigned device)
	205	{
	206	}
	207
	208	void retro_get_system_info(struct retro_system_info *info)
	209	{
	210	memset(info, 0, sizeof(*info));
	211	info->library_name = "PicoDrive";
	212	info->library_version = VERSION;
53b2e51c	213	info->valid_extensions = "bin\|gen\|smd\|md\|32x\|cue\|iso\|sms";
2446536b	214	info->need_fullpath = true;
	215	}
	216
	217	void retro_get_system_av_info(struct retro_system_av_info *info)
	218	{
	219	memset(info, 0, sizeof(*info));
	220	info->timing.fps = Pico.m.pal ? 50 : 60;
	221	info->timing.sample_rate = 44100;
	222	info->geometry.base_width = 320;
	223	info->geometry.base_height = 240;
	224	info->geometry.max_width = VOUT_MAX_WIDTH;
	225	info->geometry.max_height = VOUT_MAX_HEIGHT;
	226	info->geometry.aspect_ratio = 4.0 / 3.0;
	227	}
	228
	229	/* savestates - TODO */
	230	size_t retro_serialize_size(void)
	231	{
	232	return 0;
	233	}
	234
	235	bool retro_serialize(void *data, size_t size)
	236	{
	237	return false;
	238	}
	239
	240	bool retro_unserialize(const void *data, size_t size)
	241	{
	242	return false;
	243	}
	244
	245	/* cheats - TODO */
	246	void retro_cheat_reset(void)
	247	{
	248	}
	249
	250	void retro_cheat_set(unsigned index, bool enabled, const char *code)
	251	{
	252	}
	253
	254	/* multidisk support */
	255	static bool disk_ejected;
	256	static unsigned int disk_current_index;
	257	static unsigned int disk_count;
	258	static struct disks_state {
	259	char *fname;
	260	} disks[8];
	261
	262	static bool disk_set_eject_state(bool ejected)
	263	{
	264	// TODO?
	265	disk_ejected = ejected;
	266	return true;
	267	}
	268
	269	static bool disk_get_eject_state(void)
	270	{
	271	return disk_ejected;
	272	}
	273
	274	static unsigned int disk_get_image_index(void)
	275	{
	276	return disk_current_index;
	277	}
278
279	static bool disk_set_image_index(unsigned int index)
280	{
281	cd_img_type cd_type;
282	int ret;
283
284	if (index >= sizeof(disks) / sizeof(disks[0]))
285	return false;
286
287	if (disks[index].fname == NULL) {
288	lprintf("missing disk #%u\n", index);
289
290	// RetroArch specifies "no disk" with index == count,
291	// so don't fail here..
292	disk_current_index = index;
293	return true;
294	}
295
296	lprintf("switching to disk %u: \"%s\"\n", index,
297	disks[index].fname);
298
299	ret = -1;
300	cd_type = PicoCdCheck(disks[index].fname, NULL);
301	if (cd_type != CIT_NOT_CD)
302	ret = Insert_CD(disks[index].fname, cd_type);
303	if (ret != 0) {
304	lprintf("Load failed, invalid CD image?\n");
305	return 0;
306	}
307
308	disk_current_index = index;
309	return true;
310	}
311
312	static unsigned int disk_get_num_images(void)
313	{
314	return disk_count;
315	}
316
317	static bool disk_replace_image_index(unsigned index,
318	const struct retro_game_info *info)
319	{
320	bool ret = true;
321
322	if (index >= sizeof(disks) / sizeof(disks[0]))
323	return false;
324
325	if (disks[index].fname != NULL)
326	free(disks[index].fname);
327	disks[index].fname = NULL;
328
329	if (info != NULL) {
330	disks[index].fname = strdup(info->path);
331	if (index == disk_current_index)
332	ret = disk_set_image_index(index);
333	}
334
335	return ret;
336	}
337
338	static bool disk_add_image_index(void)
339	{
340	if (disk_count >= sizeof(disks) / sizeof(disks[0]))
341	return false;
342
343	disk_count++;
344	return true;
345	}
346
347	static struct retro_disk_control_callback disk_control = {
348	.set_eject_state = disk_set_eject_state,
349	.get_eject_state = disk_get_eject_state,
350	.get_image_index = disk_get_image_index,
351	.set_image_index = disk_set_image_index,
352	.get_num_images = disk_get_num_images,
353	.replace_image_index = disk_replace_image_index,
354	.add_image_index = disk_add_image_index,
355	};
356
357	static void disk_tray_open(void)
358	{
359	lprintf("cd tray open\n");
360	disk_ejected = 1;
361	}
362
363	static void disk_tray_close(void)
364	{
365	lprintf("cd tray close\n");
366	disk_ejected = 0;
367	}
368
369
370	static const char * const biosfiles_us[] = {
371	"us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
372	};
373	static const char * const biosfiles_eu[] = {
374	"eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
375	};
376	static const char * const biosfiles_jp[] = {
377	"jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
378	};
379
380	static void make_system_path(char *buf, size_t buf_size,
381	const char name, const char ext)
382	{
383	const char *dir = NULL;
384
385	if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
386	snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
387	}
388	else {
389	snprintf(buf, buf_size, "%s%s", name, ext);
390	}
391	}
392
393	static const char find_bios(int region, const char *cd_fname)
394	{
395	const char * const *files;
396	static char path[256];
397	int i, count;
398	FILE *f = NULL;
399
400	if (*region == 4) { // US
401	files = biosfiles_us;
402	count = sizeof(biosfiles_us) / sizeof(char *);
403	} else if (*region == 8) { // EU
404	files = biosfiles_eu;
405	count = sizeof(biosfiles_eu) / sizeof(char *);
406	} else if (region == 1 \|\| region == 2) {
407	files = biosfiles_jp;
408	count = sizeof(biosfiles_jp) / sizeof(char *);
409	} else {
410	return NULL;
411	}
412
413	for (i = 0; i < count; i++)
414	{
415	make_system_path(path, sizeof(path), files[i], ".bin");
416	f = fopen(path, "rb");
417	if (f != NULL)
418	break;
419
420	make_system_path(path, sizeof(path), files[i], ".zip");
421	f = fopen(path, "rb");
422	if (f != NULL)
423	break;
424	}
425
426	if (f != NULL) {
427	lprintf("using bios: %s\n", path);
428	fclose(f);
429	return path;
430	}
431
432	return NULL;
433	}
434
435	bool retro_load_game(const struct retro_game_info *info)
436	{
437	enum media_type_e media_type;
438	static char carthw_path[256];
439	size_t i;
440
441	enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
442	if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
443	lprintf("RGB565 suppot required, sorry\n");
444	return false;
445	}
446
447	if (info == NULL \|\| info->path == NULL) {
448	lprintf("info->path required\n");
449	return false;
450	}
451
452	for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
453	if (disks[i].fname != NULL) {
454	free(disks[i].fname);
455	disks[i].fname = NULL;
456	}
457	}
458
459	disk_current_index = 0;
460	disk_count = 1;
461	disks[0].fname = strdup(info->path);
462
463	make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
464
465	media_type = PicoLoadMedia(info->path, carthw_path,
466	find_bios, NULL);
467
468	switch (media_type) {
469	case PM_BAD_DETECT:
470	lprintf("Failed to detect ROM/CD image type.\n");
471	return false;
472	case PM_BAD_CD:
473	lprintf("Invalid CD image\n");
474	return false;
475	case PM_BAD_CD_NO_BIOS:
476	lprintf("Missing BIOS\n");
477	return false;
478	case PM_ERROR:
479	lprintf("Load error\n");
480	return false;
481	default:
482	break;
483	}
484
485	PicoLoopPrepare();
486
487	PicoWriteSound = snd_write;
488	memset(sndBuffer, 0, sizeof(sndBuffer));
489	PsndOut = sndBuffer;
490	PsndRerate(1);
491
492	return true;
493	}
494
495	bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
496	{
497	return false;
498	}
499
500	void retro_unload_game(void)
501	{
502	}
503
504	unsigned retro_get_region(void)
505	{
506	return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
507	}
508
509	void *retro_get_memory_data(unsigned id)
510	{
511	if (id != RETRO_MEMORY_SAVE_RAM)
512	return NULL;
513
514	if (PicoAHW & PAHW_MCD)
515	return Pico_mcd->bram;
516	else
517	return SRam.data;
518	}
519
520	size_t retro_get_memory_size(unsigned id)
521	{
522	if (id != RETRO_MEMORY_SAVE_RAM)
523	return 0;
524
525	if (PicoAHW & PAHW_MCD)
526	// bram
527	return 0x2000;
528	else
529	return SRam.size;
530	}
531
532	void retro_reset(void)
533	{
534	PicoReset();
535	}
536
537	static const unsigned short retro_pico_map[] = {
538	[RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
539	[RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
540	[RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
541	[RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
542	[RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
543	[RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
544	[RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
545	[RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
546	[RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
547	[RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
548	[RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
549	[RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
550	};
551	#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
552
553	static void snd_write(int len)
554	{
555	audio_batch_cb(PsndOut, len / 4);
556	}
557
558	void retro_run(void)
559	{
560	bool updated = false;
561	int pad, i;
562
563	if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
564	; //update_variables(true);
565
566	input_poll_cb();
567
568	PicoPad[0] = PicoPad[1] = 0;
569	for (pad = 0; pad < 2; pad++)
570	for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
571	if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
572	PicoPad[pad] \|= retro_pico_map[i];
573
574	PicoFrame();
575
576	video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
577	}
578
579	void retro_init(void)
580	{
581	int level;
582
583	#ifdef IOS
584	emu_log = fopen("/User/Documents/PicoDrive.log", "w");
585	if (emu_log == NULL)
586	emu_log = fopen("PicoDrive.log", "w");
587	if (emu_log == NULL)
588	#endif
589	emu_log = stdout;
590
591	level = 0;
592	environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
593
594	environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
595
596	PicoOpt = POPT_EN_STEREO\|POPT_EN_FM\|POPT_EN_PSG\|POPT_EN_Z80
720bfc5d	597	\| POPT_EN_MCD_PCM\|POPT_EN_MCD_CDDA\|POPT_EN_MCD_GFX
	598	\| POPT_EN_32X\|POPT_EN_PWM
	599	\| POPT_ACC_SPRITES\|POPT_DIS_32C_BORDER;
	600	#ifdef __arm__
	601	PicoOpt \|= POPT_EN_SVP_DRC;
	602	#endif
2446536b	603	PsndRate = 44100;
	604	PicoAutoRgnOrder = 0x184; // US, EU, JP
	605	PicoCDBuffers = 0;
	606
2446536b	607	vout_width = 320;
	608	vout_height = 240;
	609	vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
	610
	611	PicoInit();
41946d70	612	PicoDrawSetOutFormat(PDF_RGB555, 0);
2446536b	613	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
	614
	615	//PicoMessage = plat_status_msg_busy_next;
	616	PicoMCDopenTray = disk_tray_open;
	617	PicoMCDcloseTray = disk_tray_close;
	618	}
	619
	620	void retro_deinit(void)
	621	{
	622	PicoExit();
	623	}