/* * libretro core glue for PicoDrive * (C) notaz, 2013 * (C) aliaspider, 2016 * (C) Daniel De Matteis, 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 #include #include #include #ifndef _WIN32 #ifndef NO_MMAP #include #endif #else #include #include #include #endif #include #ifdef __MACH__ #include #endif #ifdef _3DS #include "3ds/3ds_utils.h" #define MEMOP_MAP 4 #define MEMOP_UNMAP 5 #define MEMOP_PROT 6 int svcDuplicateHandle(unsigned int* out, unsigned int original); int svcCloseHandle(unsigned int handle); int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1, unsigned int size, unsigned int type, unsigned int perm); void* linearMemAlign(size_t size, size_t alignment); void linearFree(void* mem); static int ctr_svchack_successful = 0; #elif defined(VITA) #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes #include static int sceBlock; int getVMBlock(); int _newlib_vm_size_user = 1 << TARGET_SIZE_2; #endif #include #include #include #include "../common/input_pico.h" #include "../common/version.h" #include "libretro.h" static retro_log_printf_t log_cb; 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; #define VOUT_MAX_WIDTH 320 #define VOUT_MAX_HEIGHT 240 static const float VOUT_PAR = 0.0; static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f)); static const float VOUT_CRT = (224.0f * 1.29911f); bool show_overscan = false; static void *vout_buf; static int vout_width, vout_height, vout_offset; static float user_vout_width = 0.0; #ifdef _MSC_VER static short sndBuffer[2*44100/50]; #else static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; #endif 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__ size_t len = (char *)end - (char *)start; (void)len; #if defined(__BLACKBERRY_QNX__) msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE); #elif defined(__MACH__) sys_dcache_flush(start, len); sys_icache_invalidate(start, len); #elif defined(_3DS) ctr_flush_invalidate_cache(); #elif defined(VITA) sceKernelSyncVMDomain(sceBlock, start, len); #else __clear_cache(start, end); #endif #endif } #ifdef _WIN32 /* mmap() replacement for Windows * * Author: Mike Frysinger * 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) { uint32_t flProtect, dwDesiredAccess; off_t end; HANDLE mmap_fd, h; void *ret; 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; 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; end = length + offset; 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; 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; 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() ... */ } #elif defined(NO_MMAP) #define PROT_EXEC 0x04 #define MAP_FAILED 0 #define PROT_READ 0 #define PROT_WRITE 0 #define MAP_PRIVATE 0 #define MAP_ANONYMOUS 0 void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off) { return malloc(len); } void munmap(void *base_addr, size_t len) { free(base_addr); } int mprotect(void *addr, size_t len, int prot) { /* stub - not really needed at this point since this codepath has no dynarecs */ return 0; } #endif #ifndef MAP_ANONYMOUS #define MAP_ANONYMOUS MAP_ANON #endif #ifdef _3DS typedef struct { unsigned int requested_map; void* buffer; }pico_mmap_t; pico_mmap_t pico_mmaps[] = { {0x02000000, 0}, {0x06000000, 0}, {NULL, 0} }; void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) { (void)is_fixed; if (ctr_svchack_successful) { pico_mmap_t* pico_mmap; for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++) { if ((pico_mmap->requested_map == addr)) { unsigned int ptr_aligned, tmp; unsigned int currentHandle; unsigned int perm = 0b011; if (need_exec) perm = 0b111; size = (size + 0xFFF) & ~0xFFF; pico_mmap->buffer = malloc(size + 0x1000); ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF; svcDuplicateHandle(¤tHandle, 0xFFFF8001); if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0) { if (log_cb) log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map); exit(1); } svcCloseHandle(currentHandle); return (void*)pico_mmap->requested_map; } } } return malloc(size); } void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) { if (ctr_svchack_successful) { pico_mmap_t* pico_mmap; for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++) { if ((pico_mmap->requested_map == (unsigned int)ptr)) { unsigned int ptr_aligned; unsigned int currentHandle; void* tmp; oldsize = (oldsize + 0xFFF) & ~0xFFF; newsize = (newsize + 0xFFF) & ~0xFFF; ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF; svcDuplicateHandle(¤tHandle, 0xFFFF8001); svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011); tmp = realloc(pico_mmap->buffer, newsize + 0x1000); if(!tmp) return NULL; pico_mmap->buffer = tmp; ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF; svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3); svcCloseHandle(currentHandle); return ptr; } } } return realloc(ptr, newsize); } void plat_munmap(void *ptr, size_t size) { if (ctr_svchack_successful) { pico_mmap_t* pico_mmap; for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++) { if ((pico_mmap->requested_map == (unsigned int)ptr)) { unsigned int ptr_aligned; unsigned int currentHandle; size = (size + 0xFFF) & ~0xFFF; ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF; svcDuplicateHandle(¤tHandle, 0xFFFF8001); svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011); svcCloseHandle(currentHandle); free(pico_mmap->buffer); pico_mmap->buffer = NULL; return; } } } free(ptr); } #else 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) { if (log_cb) log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno); return NULL; } if (addr != 0 && ret != (void *)addr) { if (log_cb) log_cb(RETRO_LOG_WARN, "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); } #endif // if NULL is returned, static buffer is used void *plat_mem_get_for_drc(size_t size) { void *mem = NULL; #ifdef VITA sceKernelGetMemBlockBase(sceBlock, &mem); #endif return mem; } int plat_mem_set_exec(void *ptr, size_t size) { int ret = -1; #ifdef _WIN32 DWORD oldProtect = 0; ret = VirtualProtect(ptr, size, PAGE_EXECUTE_READWRITE, &oldProtect); if (ret == 0 && log_cb) log_cb(RETRO_LOG_ERROR, "VirtualProtect(%p, %d) failed: %d\n", ptr, (int)size, GetLastError()); #elif defined(_3DS) if (ctr_svchack_successful) { unsigned int currentHandle; svcDuplicateHandle(¤tHandle, 0xFFFF8001); ret = svcControlProcessMemory(currentHandle, ptr, 0x0, size, MEMOP_PROT, 0b111); svcCloseHandle(currentHandle); ctr_flush_invalidate_cache(); } else { if (log_cb) log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n"); exit(1); } #elif defined(VITA) ret = sceKernelOpenVMDomain(); #else ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); if (ret != 0 && log_cb) log_cb(RETRO_LOG_ERROR, "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) { struct retro_system_av_info av_info; memset(vout_buf, 0, 320 * 240 * 2); vout_width = is_32cols ? 256 : 320; PicoDrawSetOutBuf(vout_buf, vout_width * 2); if (show_overscan == true) line_count += 16; if (show_overscan == true) start_line -= 8; vout_height = line_count; vout_offset = vout_width * start_line; // Update the geometry retro_get_system_av_info(&av_info); environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info); } void emu_32x_startup(void) { } void lprintf(const char *fmt, ...) { char buffer[256]; va_list ap; va_start(ap, fmt); vsprintf(buffer, fmt, ap); /* TODO - add 'level' param for warning/error messages? */ if (log_cb) log_cb(RETRO_LOG_INFO, "%s", buffer); va_end(ap); } /* libretro */ void retro_set_environment(retro_environment_t cb) { static const struct retro_variable vars[] = { { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" }, { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" }, { "picodrive_sprlim", "No sprite limit; disabled|enabled" }, { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" }, { "picodrive_region", "Region; Auto|Japan NTSC|Japan PAL|US|Europe" }, { "picodrive_aspect", "Core-provided aspect ratio; PAR|4/3|CRT" }, { "picodrive_overscan", "Show Overscan; disabled|enabled" }, { "picodrive_overclk68k", "68k overclock; disabled|+25%|+50%|+75%|+100%|+200%|+400%" }, #ifdef DRC_SH2 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" }, #endif { 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"; #ifndef GIT_VERSION #define GIT_VERSION "" #endif info->library_version = VERSION GIT_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) { float common_width; memset(info, 0, sizeof(*info)); info->timing.fps = Pico.m.pal ? 50 : 60; info->timing.sample_rate = 44100; info->geometry.base_width = vout_width; info->geometry.base_height = vout_height; info->geometry.max_width = vout_width; info->geometry.max_height = vout_height; common_width = vout_width; if (user_vout_width != 0) common_width = user_vout_width; info->geometry.aspect_ratio = common_width / vout_height; } /* 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) { if (log_cb) log_cb(RETRO_LOG_ERROR, "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) { if (log_cb) log_cb(RETRO_LOG_ERROR, "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; } typedef struct patch { unsigned int addr; unsigned short data; unsigned char comp; } patch; extern void decode(char *buff, patch *dest); extern uint16_t m68k_read16(uint32_t a); extern void m68k_write16(uint32_t a, uint16_t d); void retro_cheat_reset(void) { int i=0; unsigned int addr; for (i = 0; i < PicoPatchCount; i++) { addr = PicoPatches[i].addr; if (addr < Pico.romsize) { if (PicoPatches[i].active) *(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old; } else { if (PicoPatches[i].active) m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old); } } PicoPatchUnload(); } void retro_cheat_set(unsigned index, bool enabled, const char *code) { patch pt; int array_len = PicoPatchCount; char codeCopy[256]; char *buff; if (code=='\0') return; strcpy(codeCopy,code); buff = strtok(codeCopy,"+"); while (buff != NULL) { decode(buff, &pt); if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1) { log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff); return; } /* code was good, add it */ if (array_len < PicoPatchCount + 1) { void *ptr; array_len *= 2; array_len++; ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0])); if (ptr == NULL) { log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff); return; } PicoPatches = ptr; } strcpy(PicoPatches[PicoPatchCount].code, buff); PicoPatches[PicoPatchCount].active = enabled; PicoPatches[PicoPatchCount].addr = pt.addr; PicoPatches[PicoPatchCount].data = pt.data; PicoPatches[PicoPatchCount].comp = pt.comp; if (PicoPatches[PicoPatchCount].addr < Pico.romsize) PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr); else PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr); PicoPatchCount++; buff = strtok(NULL,"+"); } } /* 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) { enum cd_img_type cd_type; int ret; if (index >= sizeof(disks) / sizeof(disks[0])) return false; if (disks[index].fname == NULL) { if (log_cb) log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index); // RetroArch specifies "no disk" with index == count, // so don't fail here.. disk_current_index = index; return true; } if (log_cb) log_cb(RETRO_LOG_INFO, "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 = cdd_load(disks[index].fname, cd_type); if (ret != 0) { if (log_cb) log_cb(RETRO_LOG_ERROR, "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 = { disk_set_eject_state, disk_get_eject_state, disk_get_image_index, disk_set_image_index, disk_get_num_images, disk_replace_image_index, disk_add_image_index, }; static void disk_tray_open(void) { if (log_cb) log_cb(RETRO_LOG_INFO, "cd tray open\n"); disk_ejected = 1; } static void disk_tray_close(void) { if (log_cb) log_cb(RETRO_LOG_INFO, "cd tray close\n"); disk_ejected = 0; } static const char * const biosfiles_us[] = { "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U" }; static const char * const biosfiles_eu[] = { "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E" }; static const char * const biosfiles_jp[] = { "jp_mcd2_921222", "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) { if (log_cb) log_cb(RETRO_LOG_INFO, "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; struct retro_input_descriptor desc[] = { { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 0 }, }; struct retro_input_descriptor desc_sms[] = { { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" }, { 0 }, }; enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { if (log_cb) log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n"); return false; } if (info == NULL || info->path == NULL) { if (log_cb) log_cb(RETRO_LOG_ERROR, "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: if (log_cb) log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n"); return false; case PM_BAD_CD: if (log_cb) log_cb(RETRO_LOG_ERROR, "Invalid CD image\n"); return false; case PM_BAD_CD_NO_BIOS: if (log_cb) log_cb(RETRO_LOG_ERROR, "Missing BIOS\n"); return false; case PM_ERROR: if (log_cb) log_cb(RETRO_LOG_ERROR, "Load error\n"); return false; default: break; } if (media_type == PM_MARK3) environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms); else environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc); PicoLoopPrepare(); PicoIn.writeSound = snd_write; memset(sndBuffer, 0, sizeof(sndBuffer)); PicoIn.sndOut = sndBuffer; PsndRerate(0); 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 type) { uint8_t* data; switch(type) { case RETRO_MEMORY_SAVE_RAM: if (PicoIn.AHW & PAHW_MCD) data = Pico_mcd->bram; else data = Pico.sv.data; break; case RETRO_MEMORY_SYSTEM_RAM: if (PicoIn.AHW & PAHW_SMS) data = PicoMem.zram; else data = PicoMem.ram; break; default: data = NULL; break; } return data; } size_t retro_get_memory_size(unsigned type) { unsigned int i; int sum; switch(type) { case RETRO_MEMORY_SAVE_RAM: if (PicoIn.AHW & PAHW_MCD) // bram return 0x2000; if (Pico.m.frame_count == 0) return Pico.sv.size; // if game doesn't write to sram, don't report it to // libretro so that RA doesn't write out zeroed .srm for (i = 0, sum = 0; i < Pico.sv.size; i++) sum |= Pico.sv.data[i]; return (sum != 0) ? Pico.sv.size : 0; case RETRO_MEMORY_SYSTEM_RAM: if (PicoIn.AHW & PAHW_SMS) return 0x2000; else return sizeof(PicoMem.ram); default: return 0; } } void retro_reset(void) { PicoReset(); } static const unsigned short retro_pico_map[] = { 1 << GBTN_B, 1 << GBTN_A, 1 << GBTN_MODE, 1 << GBTN_START, 1 << GBTN_UP, 1 << GBTN_DOWN, 1 << GBTN_LEFT, 1 << GBTN_RIGHT, 1 << GBTN_C, 1 << GBTN_Y, 1 << GBTN_X, 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(PicoIn.sndOut, len / 4); } static enum input_device input_name_to_val(const char *name) { if (strcmp(name, "3 button pad") == 0) return PICO_INPUT_PAD_3BTN; if (strcmp(name, "6 button pad") == 0) return PICO_INPUT_PAD_6BTN; if (strcmp(name, "None") == 0) return PICO_INPUT_NOTHING; if (log_cb) log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name); return PICO_INPUT_PAD_3BTN; } static void update_variables(void) { struct retro_variable var; int OldPicoRegionOverride; float old_user_vout_width; var.value = NULL; var.key = "picodrive_input1"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) PicoSetInputDevice(0, input_name_to_val(var.value)); var.value = NULL; var.key = "picodrive_input2"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) PicoSetInputDevice(1, input_name_to_val(var.value)); var.value = NULL; var.key = "picodrive_sprlim"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "enabled") == 0) PicoIn.opt |= POPT_DIS_SPRITE_LIM; else PicoIn.opt &= ~POPT_DIS_SPRITE_LIM; } var.value = NULL; var.key = "picodrive_ramcart"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "enabled") == 0) PicoIn.opt |= POPT_EN_MCD_RAMCART; else PicoIn.opt &= ~POPT_EN_MCD_RAMCART; } OldPicoRegionOverride = PicoIn.regionOverride; var.value = NULL; var.key = "picodrive_region"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "Auto") == 0) PicoIn.regionOverride = 0; else if (strcmp(var.value, "Japan NTSC") == 0) PicoIn.regionOverride = 1; else if (strcmp(var.value, "Japan PAL") == 0) PicoIn.regionOverride = 2; else if (strcmp(var.value, "US") == 0) PicoIn.regionOverride = 4; else if (strcmp(var.value, "Europe") == 0) PicoIn.regionOverride = 8; } // Update region, fps and sound flags if needed if (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride) { PicoDetectRegion(); PicoLoopPrepare(); PsndRerate(1); } old_user_vout_width = user_vout_width; var.value = NULL; var.key = "picodrive_aspect"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "4/3") == 0) user_vout_width = VOUT_4_3; else if (strcmp(var.value, "CRT") == 0) user_vout_width = VOUT_CRT; else user_vout_width = VOUT_PAR; } var.value = NULL; var.key = "picodrive_overscan"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "enabled") == 0) show_overscan = true; else show_overscan = false; } if (user_vout_width != old_user_vout_width) { // Update the geometry struct retro_system_av_info av_info; retro_get_system_av_info(&av_info); environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info); } var.value = NULL; var.key = "picodrive_overclk68k"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { PicoIn.overclockM68k = 0; if (var.value[0] == '+') PicoIn.overclockM68k = atoi(var.value + 1); } #ifdef DRC_SH2 var.value = NULL; var.key = "picodrive_drc"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "enabled") == 0) PicoIn.opt |= POPT_EN_DRC; else PicoIn.opt &= ~POPT_EN_DRC; } #endif #ifdef _3DS if(!ctr_svchack_successful) PicoIn.opt &= ~POPT_EN_DRC; #endif } void retro_run(void) { bool updated = false; int pad, i; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) update_variables(); input_poll_cb(); PicoIn.pad[0] = PicoIn.pad[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)) PicoIn.pad[pad] |= retro_pico_map[i]; PicoPatchApply(); PicoFrame(); video_cb((short *)vout_buf + vout_offset, vout_width, vout_height, vout_width * 2); } void retro_init(void) { struct retro_log_callback log; int level; level = 0; environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) log_cb = log.log; else log_cb = NULL; environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); #ifdef _3DS ctr_svchack_successful = ctr_svchack_init(); #elif defined(VITA) sceBlock = getVMBlock(); #endif PicoIn.opt = 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__ #ifdef _3DS if (ctr_svchack_successful) #endif PicoIn.opt |= POPT_EN_DRC; #endif PicoIn.sndRate = 44100; PicoIn.autoRgnOrder = 0x184; // US, EU, JP vout_width = 320; vout_height = 240; #ifdef _3DS vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80); #else vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); #endif PicoInit(); PicoDrawSetOutFormat(PDF_RGB555, 0); PicoDrawSetOutBuf(vout_buf, vout_width * 2); //PicoIn.osdMessage = plat_status_msg_busy_next; PicoIn.mcdTrayOpen = disk_tray_open; PicoIn.mcdTrayClose = disk_tray_close; update_variables(); } void retro_deinit(void) { #ifdef _3DS linearFree(vout_buf); #else free(vout_buf); #endif vout_buf = NULL; PicoExit(); } // vim:shiftwidth=3:ts=3:expandtab