/* * libretro core glue for PicoDrive * (C) notaz, 2013 * (C) aliaspider, 2016 * (C) Daniel De Matteis, 2013 * (C) kub, 2020 * * 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 #ifdef __SWITCH__ #include "switch/mman.h" #else #include #endif #endif #else #include #include #include #endif #include #ifdef __MACH__ #include #endif #ifdef USE_LIBRETRO_VFS #include "file_stream_transforms.h" #endif #if defined(RENDER_GSKIT_PS2) #include #include "libretro-common/include/libretro_gskit_ps2.h" #include "ps2/asm.h" #else #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 "libretro_core_options.h" #include #include #include #include #include "../common/input_pico.h" #include "../common/version.h" #include 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 #define INITIAL_SND_RATE 44100 static const float VOUT_PAR = 0.0; static const float VOUT_4_3 = (4.0f / 3.0f); static const float VOUT_CRT = (1.29911f); /* Required to allow on the fly changes to 'renderer' */ static int vm_current_start_line = -1; static int vm_current_line_count = -1; static int vm_current_start_col = -1; static int vm_current_col_count = -1; static int vout_16bit = 1; static int vout_format = PDF_RGB555; static void *vout_buf, *vout_ghosting_buf; static int vout_width, vout_height, vout_offset; static float vout_aspect = 0.0; static int vout_ghosting = 0; #if defined(RENDER_GSKIT_PS2) #define VOUT_8BIT_WIDTH 328 #define VOUT_8BIT_HEIGHT 256 RETRO_HW_RENDER_INTEFACE_GSKIT_PS2 *ps2 = NULL; static void *retro_palette; static struct retro_hw_ps2_insets padding; #endif static short ALIGNED(4) sndBuffer[2*INITIAL_SND_RATE/50]; static void snd_write(int len); char **g_argv; #ifdef _WIN32 #define SLASH '\\' #else #define SLASH '/' #endif /* Frameskipping Support */ static unsigned frameskip_type = 0; static unsigned frameskip_threshold = 0; static uint16_t frameskip_counter = 0; static bool retro_audio_buff_active = false; static unsigned retro_audio_buff_occupancy = 0; static bool retro_audio_buff_underrun = false; /* Maximum number of consecutive frames that * can be skipped */ #define FRAMESKIP_MAX 60 static unsigned audio_latency = 0; static bool update_audio_latency = false; static void retro_audio_buff_status_cb( bool active, unsigned occupancy, bool underrun_likely) { retro_audio_buff_active = active; retro_audio_buff_occupancy = occupancy; retro_audio_buff_underrun = underrun_likely; } static void init_frameskip(void) { if (frameskip_type > 0) { struct retro_audio_buffer_status_callback buf_status_cb; buf_status_cb.callback = retro_audio_buff_status_cb; if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, &buf_status_cb)) { if (log_cb) log_cb(RETRO_LOG_WARN, "Frameskip disabled - frontend does not support audio buffer status monitoring.\n"); retro_audio_buff_active = false; retro_audio_buff_occupancy = 0; retro_audio_buff_underrun = false; audio_latency = 0; } else { /* Frameskip is enabled - increase frontend * audio latency to minimise potential * buffer underruns */ float frame_time_msec = 1000.0f / (Pico.m.pal ? 50.0f : 60.0f); /* Set latency to 6x current frame time... */ audio_latency = (unsigned)((6.0f * frame_time_msec) + 0.5f); /* ...then round up to nearest multiple of 32 */ audio_latency = (audio_latency + 0x1F) & ~0x1F; } } else { environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL); audio_latency = 0; } update_audio_latency = true; } /* 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 RENDER_GSKIT_PS2 /* ee-gcc is version 3.2, where these aren't yet defined */ void __builtin___clear_cache(void *b, void *e) { #if 0 /* which of these is overall faster for lots of small cache updates? */ SyncDCache(b, e); #else FlushCache(0); /* WRITEBACK_DCACHE */ #endif FlushCache(2); /* INVALIDATE_ICACHE */ } int __builtin_parity(unsigned v) { /* credits to bit twiddling hacks, https://graphics.stanford.edu/~seander/bithacks.html */ v ^= v >> 16; v ^= v >> 8; v ^= v >> 4; return (0x6996 >> (v&0xf)) & 1; } #endif #ifdef __MACH__ /* calls to this may be generated by the compiler, but it's missing in libc? */ void __clear_cache(void *start, void *end) { size_t len = (char *)end - (char *)start; sys_dcache_flush(start, len); sys_icache_invalidate(start, len); } #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 calloc(1, 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 *)(uintptr_t)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 *)(uintptr_t)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) { #if defined(__linux__) && !defined(__SWITCH__) 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; #if defined VITA sceKernelGetMemBlockBase(sceBlock, &mem); #elif defined HW_WUP // For WiiU, a slice of RWX memory left from the exploit is used, see: // https://github.com/embercold/pcsx_rearmed/commit/af0453223 mem = (void *)(0x01000000 - size); #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 start_col, int col_count) { struct retro_system_av_info av_info; vm_current_start_line = start_line; vm_current_line_count = line_count; vm_current_start_col = start_col; vm_current_col_count = col_count; // 8bit renderes create a 328x256 CLUT image, while 16bit creates 320x240 RGB vout_16bit = vout_format == PDF_RGB555 || (PicoIn.AHW & PAHW_32X); #if defined(RENDER_GSKIT_PS2) // calculate the borders of the real image inside the picodrive image vout_width = (vout_16bit ? VOUT_MAX_WIDTH : VOUT_8BIT_WIDTH); vout_height = (vout_16bit ? VOUT_MAX_HEIGHT : VOUT_8BIT_HEIGHT); vout_offset = (vout_16bit ? 0 : 8); // 8bit has 8 px overlap area on the left padding = (struct retro_hw_ps2_insets){start_line, vout_offset, vout_height - line_count - start_line, vout_width - col_count - vout_offset}; int pxsz = (vout_16bit ? 2 : 1); // pixel size: RGB = 16 bits, CLUT = 8 bits memset(vout_buf, 0, pxsz * vout_width * vout_height); memset(retro_palette, 0, gsKit_texture_size_ee(16, 16, GS_PSM_CT16)); PicoDrawSetOutBuf(vout_buf, pxsz * vout_width); if (ps2) { // prepare image as texture for rendering ps2->coreTexture->Width = vout_width; ps2->coreTexture->Height = vout_height; ps2->coreTexture->PSM = (vout_16bit ? GS_PSM_CT16 : GS_PSM_T8); ps2->padding = padding; } #else vout_width = col_count; memset(vout_buf, 0, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); if (vout_16bit) PicoDrawSetOutBuf(vout_buf, vout_width * 2); vout_height = line_count; /* Note: We multiply by 2 here to account for pitch */ vout_offset = vout_width * start_line * 2; /* Redundant sanity check... */ vout_height = (vout_height > VOUT_MAX_HEIGHT) ? VOUT_MAX_HEIGHT : vout_height; vout_offset = (vout_offset > vout_width * (VOUT_MAX_HEIGHT - 1) * 2) ? vout_width * (VOUT_MAX_HEIGHT - 1) * 2 : vout_offset; /* LCD ghosting */ if (vout_ghosting && vout_height == 144) { vout_ghosting_buf = realloc(vout_ghosting_buf, VOUT_MAX_HEIGHT*vout_width*2); memset(vout_ghosting_buf, 0, vout_width*vout_height*2); } #endif Pico.m.dirtyPal = 1; // Update the geometry retro_get_system_av_info(&av_info); environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info); } void emu_32x_startup(void) { PicoDrawSetOutFormat(vout_format, 0); if ((vm_current_start_line != -1) && (vm_current_line_count != -1) && (vm_current_start_col != -1) && (vm_current_col_count != -1)) emu_video_mode_change( vm_current_start_line, vm_current_line_count, vm_current_start_col, vm_current_col_count); } 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 */ bool libretro_supports_bitmasks = false; void retro_set_environment(retro_environment_t cb) { bool option_categories_supported; #ifdef USE_LIBRETRO_VFS struct retro_vfs_interface_info vfs_iface_info; #endif environ_cb = cb; libretro_set_core_options(environ_cb, &option_categories_supported); #ifdef USE_LIBRETRO_VFS vfs_iface_info.required_interface_version = 1; vfs_iface_info.iface = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VFS_INTERFACE, &vfs_iface_info)) filestream_vfs_init(&vfs_iface_info); #endif } 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 "" #else #define _GIT_VERSION "-" GIT_VERSION #endif info->library_version = VERSION _GIT_VERSION; info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|chd|sms|gg"; info->need_fullpath = true; } void retro_get_system_av_info(struct retro_system_av_info *info) { float tv_height = (vout_height > 144 ? Pico.m.pal ? 240 : 224 : 144); float common_width; memset(info, 0, sizeof(*info)); info->timing.fps = Pico.m.pal ? 50 : 60; info->timing.sample_rate = PicoIn.sndRate; 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 (vout_aspect != 0) common_width = vout_aspect * tv_height; 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 uint32_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_track_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 >= 0 && cd_type != CT_UNKNOWN) 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; } static void set_memory_maps(void) { if (PicoIn.AHW & PAHW_MCD) { const size_t SCD_BIT = 1ULL << 31ULL; const uint64_t mem = RETRO_MEMDESC_SYSTEM_RAM; struct retro_memory_map mmaps; struct retro_memory_descriptor descs[] = { { mem, PicoMem.ram, 0, 0xFF0000, 0, 0, 0x10000, "68KRAM" }, /* virtual address using SCD_BIT so all 512M of prg_ram can be accessed */ /* at address $80020000 */ { mem, Pico_mcd->prg_ram, 0, SCD_BIT | 0x020000, 0, 0, 0x80000, "PRGRAM" }, }; mmaps.descriptors = descs; mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]); environ_cb(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps); } } 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); PicoDrawSetOutFormat(vout_format, 0); if (vout_format == PDF_8BIT) PicoDrawSetOutBuf(Pico.est.Draw2FB, 328); /* Setup retro memory maps */ set_memory_maps(); init_frameskip(); 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: /* Note: MCD RAM cart uses Pico.sv.data */ if ((PicoIn.AHW & PAHW_MCD) && !(PicoIn.opt & POPT_EN_MCD_RAMCART)) 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) { if (PicoIn.opt & POPT_EN_MCD_RAMCART) return 0x12000; else /* 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[] = { [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(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(bool first_run) { struct retro_variable var; int OldPicoRegionOverride; float old_vout_aspect; unsigned old_frameskip_type; int old_vout_format; double new_sound_rate; unsigned short old_snd_filter; int32_t old_snd_filter_range; 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_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; } var.value = NULL; var.key = "picodrive_smstype"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "Auto") == 0) PicoIn.hwSelect = PHWS_AUTO; else if (strcmp(var.value, "Game Gear") == 0) PicoIn.hwSelect = PHWS_GG; else PicoIn.hwSelect = PHWS_SMS; } var.value = NULL; var.key = "picodrive_smsfm"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "on") == 0) PicoIn.opt |= POPT_EN_YM2413; else PicoIn.opt &= ~POPT_EN_YM2413; } var.value = NULL; var.key = "picodrive_smsmapper"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "Auto") == 0) PicoIn.mapper = PMS_MAP_AUTO; else if (strcmp(var.value, "Codemasters") == 0) PicoIn.mapper = PMS_MAP_CODEM; else if (strcmp(var.value, "Korea") == 0) PicoIn.mapper = PMS_MAP_KOREA; else if (strcmp(var.value, "Korea MSX") == 0) PicoIn.mapper = PMS_MAP_MSX; else if (strcmp(var.value, "Korea X-in-1") == 0) PicoIn.mapper = PMS_MAP_N32K; else if (strcmp(var.value, "Korea 4-Pak") == 0) PicoIn.mapper = PMS_MAP_N16K; else if (strcmp(var.value, "Korea Janggun") == 0) PicoIn.mapper = PMS_MAP_JANGGUN; else if (strcmp(var.value, "Korea Nemesis") == 0) PicoIn.mapper = PMS_MAP_NEMESIS; else PicoIn.mapper = PMS_MAP_SEGA; } var.value = NULL; var.key = "picodrive_ggghost"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "normal") == 0) vout_ghosting = 2; else if (strcmp(var.value, "weak") == 0) vout_ghosting = 1; else vout_ghosting = 0; } 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_vout_aspect = vout_aspect; var.value = NULL; var.key = "picodrive_aspect"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "4/3") == 0) vout_aspect = VOUT_4_3; else if (strcmp(var.value, "CRT") == 0) vout_aspect = VOUT_CRT; else vout_aspect = VOUT_PAR; } if (vout_aspect != old_vout_aspect) { // 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_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_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 var.value = NULL; var.key = "picodrive_dacnoise"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "enabled") == 0) PicoIn.opt |= POPT_EN_FM_DAC; else PicoIn.opt &= ~POPT_EN_FM_DAC; } old_snd_filter = PicoIn.opt & POPT_EN_SNDFILTER; var.value = NULL; var.key = "picodrive_audio_filter"; PicoIn.opt &= ~POPT_EN_SNDFILTER; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "low-pass") == 0) PicoIn.opt |= POPT_EN_SNDFILTER; } old_snd_filter_range = PicoIn.sndFilterAlpha; var.value = NULL; var.key = "picodrive_lowpass_range"; PicoIn.sndFilterAlpha = (60 * 0x10000 / 100); if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { PicoIn.sndFilterAlpha = (atoi(var.value) * 0x10000 / 100); } if (((old_snd_filter ^ PicoIn.opt) & POPT_EN_SNDFILTER) || old_snd_filter_range != PicoIn.sndFilterAlpha) { mix_reset (PicoIn.opt & POPT_EN_SNDFILTER ? PicoIn.sndFilterAlpha : 0); } old_frameskip_type = frameskip_type; frameskip_type = 0; var.key = "picodrive_frameskip"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "auto") == 0) frameskip_type = 1; else if (strcmp(var.value, "manual") == 0) frameskip_type = 2; } frameskip_threshold = 33; var.key = "picodrive_frameskip_threshold"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) frameskip_threshold = strtol(var.value, NULL, 10); old_vout_format = vout_format; var.value = NULL; var.key = "picodrive_renderer"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "fast") == 0) vout_format = PDF_NONE; else if (strcmp(var.value, "good") == 0) vout_format = PDF_8BIT; else if (strcmp(var.value, "accurate") == 0) vout_format = PDF_RGB555; PicoIn.opt &= ~POPT_ALT_RENDERER; if (vout_format == PDF_NONE) PicoIn.opt |= POPT_ALT_RENDERER; PicoDrawSetOutFormat(vout_format, 0); if (vout_format == PDF_8BIT) PicoDrawSetOutBuf(Pico.est.Draw2FB, 328); } var.value = NULL; var.key = "picodrive_sound_rate"; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { new_sound_rate = atoi(var.value); if (new_sound_rate != PicoIn.sndRate) { /* Update the sound rate */ PicoIn.sndRate = new_sound_rate; PsndRerate(1); struct retro_system_av_info av_info; retro_get_system_av_info(&av_info); environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &av_info); } } /* setup video if required */ if (vout_format != old_vout_format) { if ((vm_current_start_line != -1) && (vm_current_line_count != -1) && (vm_current_start_col != -1) && (vm_current_col_count != -1)) emu_video_mode_change( vm_current_start_line, vm_current_line_count, vm_current_start_col, vm_current_col_count); } /* Reinitialise frameskipping, if required */ if (((frameskip_type != old_frameskip_type) || (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)) && !first_run) init_frameskip(); } void retro_run(void) { bool updated = false; int pad, i; static void *buff; int16_t input; PicoIn.skipFrame = 0; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) update_variables(false); input_poll_cb(); PicoIn.pad[0] = PicoIn.pad[1] = 0; for (pad = 0; pad < 2; pad++) { if (libretro_supports_bitmasks) { input = input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_MASK); for (i = 0; i < RETRO_PICO_MAP_LEN; i++) if (input & (1 << i)) PicoIn.pad[pad] |= retro_pico_map[i]; } else { 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]; } } if (PicoPatches) PicoPatchApply(); /* Check whether current frame should * be skipped */ if ((frameskip_type > 0) && retro_audio_buff_active) { switch (frameskip_type) { case 1: /* auto */ PicoIn.skipFrame = retro_audio_buff_underrun ? 1 : 0; break; case 2: /* manual */ PicoIn.skipFrame = (retro_audio_buff_occupancy < frameskip_threshold) ? 1 : 0; break; default: PicoIn.skipFrame = 0; break; } if (!PicoIn.skipFrame || (frameskip_counter >= FRAMESKIP_MAX)) { PicoIn.skipFrame = 0; frameskip_counter = 0; } else frameskip_counter++; } /* If frameskip settings have changed, update * frontend audio latency */ if (update_audio_latency) { environ_cb(RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY, &audio_latency); update_audio_latency = false; } PicoFrame(); /* If frame was skipped, call video_cb() with * a NULL buffer and return immediately */ if (PicoIn.skipFrame) { video_cb(NULL, vout_width, vout_height, vout_width * 2); return; } #if defined(RENDER_GSKIT_PS2) buff = (uint32_t *)RETRO_HW_FRAME_BUFFER_VALID; if (!ps2) { // get access to the graphics hardware if (!environ_cb(RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE, (void **)&ps2) || !ps2) { printf("Failed to get HW rendering interface!\n"); return; } if (ps2->interface_version != RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION) { printf("HW render interface mismatch, expected %u, got %u!\n", RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION, ps2->interface_version); return; } ps2->coreTexture->ClutPSM = GS_PSM_CT16; ps2->coreTexture->Filter = GS_FILTER_LINEAR; ps2->coreTexture->Clut = retro_palette; ps2->coreTexture->Mem = vout_buf; ps2->coreTexture->Width = vout_width; ps2->coreTexture->Height = vout_height; ps2->coreTexture->PSM = (vout_16bit ? GS_PSM_CT16 : GS_PSM_T8); ps2->padding = padding; } // CLUT update needed? if (!vout_16bit && Pico.m.dirtyPal) { PicoDrawUpdateHighPal(); // Rotate CLUT. PS2 is special since entries in CLUT are not in sequence. unsigned short int *pal=(void *)retro_palette; for (i = 0; i < 256; i+=8) { if ((i&0x18) == 0x08) memcpy(pal+i,Pico.est.HighPal+i+8,16); else if ((i&0x18) == 0x10) memcpy(pal+i,Pico.est.HighPal+i-8,16); else memcpy(pal+i,Pico.est.HighPal+i,16); } } #else if (!vout_16bit) { /* The 8 bit renderers write a CLUT image in Pico.est.Draw2FB, while libretro wants RGB in vout_buf. * We need to manually copy that to vout_buf, applying the CLUT on the way. Especially * with the fast renderer this is improving performance, at the expense of accuracy. */ /* This section is mostly copied from pemu_finalize_frame in platform/linux/emu.c */ unsigned short *pd = (unsigned short *)((char *)vout_buf + vout_offset); /* Skip the leftmost 8 columns (it is used as an overlap area for rendering) */ unsigned char *ps = Pico.est.Draw2FB + vm_current_start_line * 328 + 8; unsigned short *pal = Pico.est.HighPal; int x; if (Pico.m.dirtyPal) PicoDrawUpdateHighPal(); /* Copy, and skip the leftmost 8 columns again */ for (i = 0; i < vout_height; i++, ps += 8) { for (x = 0; x < vout_width; x+=4) { *pd++ = pal[*ps++]; *pd++ = pal[*ps++]; *pd++ = pal[*ps++]; *pd++ = pal[*ps++]; } ps += 320-vout_width; /* Advance to next line in case of 32col mode */ } } if (vout_ghosting && vout_height == 144) { unsigned short *pd = (unsigned short *)vout_buf; unsigned short *ps = (unsigned short *)vout_ghosting_buf; int y; for (y = 0; y < vout_height; y++) { if (vout_ghosting == 1) v_blend(pd, ps, vout_width, p_075_round); else v_blend(pd, ps, vout_width, p_05_round); pd += vout_width; ps += vout_width; } } buff = (char*)vout_buf + vout_offset; #endif video_cb((short *)buff, 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); if (environ_cb(RETRO_ENVIRONMENT_GET_INPUT_BITMASKS, NULL)) libretro_supports_bitmasks = true; #ifdef _3DS ctr_svchack_successful = ctr_svchack_init(); check_rosalina(); #elif defined(VITA) sceBlock = getVMBlock(); #endif PicoIn.opt = POPT_EN_STEREO|POPT_EN_FM | POPT_EN_PSG|POPT_EN_Z80|POPT_EN_GG_LCD | 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 struct retro_variable var = { .key = "picodrive_sound_rate" }; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) PicoIn.sndRate = atoi(var.value); else PicoIn.sndRate = INITIAL_SND_RATE; PicoIn.autoRgnOrder = 0x184; // US, EU, JP vout_width = VOUT_MAX_WIDTH; vout_height = VOUT_MAX_HEIGHT; #ifdef _3DS vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80); #elif defined(RENDER_GSKIT_PS2) vout_buf = memalign(4096, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); retro_palette = memalign(128, gsKit_texture_size_ee(16, 16, GS_PSM_CT16)); #else vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); #endif PicoInit(); //PicoIn.osdMessage = plat_status_msg_busy_next; PicoIn.mcdTrayOpen = disk_tray_open; PicoIn.mcdTrayClose = disk_tray_close; frameskip_type = 0; frameskip_threshold = 0; frameskip_counter = 0; retro_audio_buff_active = false; retro_audio_buff_occupancy = 0; retro_audio_buff_underrun = false; audio_latency = 0; update_audio_latency = false; update_variables(true); } void retro_deinit(void) { size_t i; #ifdef _3DS linearFree(vout_buf); #elif defined(RENDER_GSKIT_PS2) free(vout_buf); free(retro_palette); ps2 = NULL; #else free(vout_buf); #endif vout_buf = NULL; if (vout_ghosting_buf) free(vout_ghosting_buf); vout_ghosting_buf = NULL; PicoExit(); for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { if (disks[i].fname != NULL) { free(disks[i].fname); disks[i].fname = NULL; } } libretro_supports_bitmasks = false; }