X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Flibretro%2Flibretro.c;fp=platform%2Flibretro%2Flibretro.c;h=934b6859f55684238137c9446b124f3d0b6a8a21;hb=7612bf90bef4f54e60865db057040b62c289ea34;hp=0000000000000000000000000000000000000000;hpb=126eb5f46978a7e97aae210971f1364ee548a646;p=picodrive.git diff --git a/platform/libretro/libretro.c b/platform/libretro/libretro.c new file mode 100644 index 0000000..934b685 --- /dev/null +++ b/platform/libretro/libretro.c @@ -0,0 +1,1421 @@ +/* + * 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 +#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; +#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 + +int plat_mem_set_exec(void *ptr, size_t size) +{ +#ifdef _WIN32 + int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0); + if (ret == 0 && log_cb) + log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0); +#elif defined(_3DS) + int ret = -1; + 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) + int ret = sceKernelOpenVMDomain(); +#else + int 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) +{ + 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 + struct retro_system_av_info av_info; + 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_region_fps", "Region FPS; Auto|NTSC|PAL" }, + { "picodrive_aspect", "Core-provided aspect ratio; PAR|4/3|CRT" }, + { "picodrive_overscan", "Show Overscan; disabled|enabled" }, +#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) +{ + 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; + + float 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; +} + +static void sram_reset() +{ + SRam.data = NULL; + SRam.start = 0; + SRam.end = 0; + SRam.flags = '\0'; + SRam.unused2 = '\0'; + SRam.changed = '\0' ; + SRam.eeprom_type = '\0'; + SRam.unused3 = '\0'; + SRam.eeprom_bit_cl = '\0'; + SRam.eeprom_bit_in = '\0'; + SRam.eeprom_bit_out = '\0'; + SRam.size = 0; +} + +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 }, + }; + + sram_reset(); + + 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(); + + PicoWriteSound = snd_write; + memset(sndBuffer, 0, sizeof(sndBuffer)); + PsndOut = 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 (PicoAHW & PAHW_MCD) + data = Pico_mcd->bram; + else + data = SRam.data; + break; + case RETRO_MEMORY_SYSTEM_RAM: + if (PicoAHW & PAHW_SMS) + data = Pico.zram; + else + data = Pico.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 (PicoAHW & PAHW_MCD) + // bram + return 0x2000; + + if (Pico.m.frame_count == 0) + return SRam.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 < SRam.size; i++) + sum |= SRam.data[i]; + + return (sum != 0) ? SRam.size : 0; + + case RETRO_MEMORY_SYSTEM_RAM: + if (PicoAHW & PAHW_SMS) + return 0x2000; + else + return sizeof(Pico.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(PsndOut, 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; + + 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) + PicoOpt |= POPT_DIS_SPRITE_LIM; + else + PicoOpt &= ~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) + PicoOpt |= POPT_EN_MCD_RAMCART; + else + PicoOpt &= ~POPT_EN_MCD_RAMCART; + } + + int OldPicoRegionOverride = PicoRegionOverride; + var.value = NULL; + var.key = "picodrive_region"; + if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { + if (strcmp(var.value, "Auto") == 0) + PicoRegionOverride = 0; + else if (strcmp(var.value, "Japan NTSC") == 0) + PicoRegionOverride = 1; + else if (strcmp(var.value, "Japan PAL") == 0) + PicoRegionOverride = 2; + else if (strcmp(var.value, "US") == 0) + PicoRegionOverride = 4; + else if (strcmp(var.value, "Europe") == 0) + PicoRegionOverride = 8; + } + + int OldPicoRegionFPSOverride = PicoRegionFPSOverride; + var.value = NULL; + var.key = "picodrive_region_fps"; + if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { + if (strcmp(var.value, "Auto") == 0) + PicoRegionFPSOverride = 0; + else if (strcmp(var.value, "NTSC") == 0) + PicoRegionFPSOverride = 1; + else if (strcmp(var.value, "PAL") == 0) + PicoRegionFPSOverride = 2; + } + + // Update region, fps and sound flags if needed + if (PicoRegionOverride != OldPicoRegionOverride || + PicoRegionFPSOverride != OldPicoRegionFPSOverride) + { + PicoDetectRegion(); + PicoLoopPrepare(); + PsndRerate(1); + } + + float 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); + } + +#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) + PicoOpt |= POPT_EN_DRC; + else + PicoOpt &= ~POPT_EN_DRC; + } +#endif +#ifdef _3DS + if(!ctr_svchack_successful) + PicoOpt &= ~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(); + + 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]; + + PicoPatchApply(); + PicoFrame(); + + video_cb((short *)vout_buf + vout_offset, + vout_width, vout_height, vout_width * 2); +} + +static void check_system_specs(void) +{ + /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */ + unsigned level = 5; + environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); +} + +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 + + 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__ +#ifdef _3DS + if (ctr_svchack_successful) +#endif + PicoOpt |= POPT_EN_DRC; +#endif + PsndRate = 44100; + PicoAutoRgnOrder = 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); + + //PicoMessage = plat_status_msg_busy_next; + PicoMCDopenTray = disk_tray_open; + PicoMCDcloseTray = disk_tray_close; + + update_variables(); +} + +void retro_deinit(void) +{ +#ifdef _3DS + linearFree(vout_buf); +#else + free(vout_buf); +#endif + vout_buf = NULL; + PicoExit(); +}