From: notaz Date: Thu, 27 Jun 2013 00:33:41 +0000 (+0300) Subject: initial libretro port X-Git-Tag: v1.85~85 X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=picodrive.git;a=commitdiff_plain;h=2446536be520914616403876d7e49621ac6f4b95 initial libretro port --- diff --git a/Makefile b/Makefile index 97d339b..71e6a03 100644 --- a/Makefile +++ b/Makefile @@ -54,11 +54,35 @@ endif -include Makefile.local ifeq "$(use_musashi)" "1" -# due to CPU stop flag acces +# due to CPU stop flag access asm_cdpico = 0 asm_cdmemory = 0 endif +# frontend +ifeq "$(PLATFORM)" "generic" +OBJS += platform/linux/emu.o platform/linux/blit.o # FIXME +OBJS += platform/common/plat_sdl.o +OBJS += platform/libpicofe/plat_sdl.o platform/libpicofe/in_sdl.o +OBJS += platform/libpicofe/plat_dummy.o +USE_FRONTEND = 1 +endif +ifeq "$(PLATFORM)" "pandora" +platform/common/menu_pico.o: CFLAGS += -DPANDORA +OBJS += platform/pandora/plat.o +OBJS += platform/pandora/asm_utils.o +OBJS += platform/common/arm_utils.o +OBJS += platform/libpicofe/linux/fbdev.o +OBJS += platform/libpicofe/linux/xenv.o +OBJS += platform/libpicofe/pandora/plat.o +USE_FRONTEND = 1 +endif +ifeq "$(PLATFORM)" "libretro" +OBJS += platform/libretro.o +endif + +ifeq "$(USE_FRONTEND)" "1" + # common OBJS += platform/common/main.o platform/common/emu.o \ platform/common/menu_pico.o platform/common/config_file.o @@ -83,28 +107,14 @@ platform/libpicofe/sndout.o: CFLAGS += -DHAVE_SDL OBJS += platform/libpicofe/sndout_sdl.o endif -# frontend -OBJS += platform/common/mp3_dummy.o -ifeq "$(PLATFORM)" "generic" -OBJS += platform/linux/emu.o platform/linux/blit.o # FIXME -OBJS += platform/common/plat_sdl.o -OBJS += platform/libpicofe/plat_sdl.o platform/libpicofe/in_sdl.o -OBJS += platform/libpicofe/plat_dummy.o -endif -ifeq "$(PLATFORM)" "pandora" -platform/common/menu_pico.o: CFLAGS += -DPANDORA -OBJS += platform/pandora/plat.o -OBJS += platform/pandora/asm_utils.o -OBJS += platform/common/arm_utils.o -OBJS += platform/libpicofe/linux/fbdev.o -OBJS += platform/libpicofe/linux/xenv.o -OBJS += platform/libpicofe/pandora/plat.o -endif - ifeq "$(ARCH)" "arm" OBJS += platform/libpicofe/arm_linux.o endif +endif # USE_FRONTEND + +OBJS += platform/common/mp3_dummy.o + # zlib OBJS += zlib/gzio.o zlib/inffast.o zlib/inflate.o zlib/inftrees.o zlib/trees.o \ zlib/deflate.o zlib/crc32.o zlib/adler32.o zlib/zutil.o zlib/compress.o zlib/uncompr.o diff --git a/Makefile.libretro b/Makefile.libretro new file mode 100644 index 0000000..05b8e60 --- /dev/null +++ b/Makefile.libretro @@ -0,0 +1,114 @@ +# Makefile for PicoDrive (libretro) + +ifeq ($(platform),) +platform = unix +ifeq ($(shell uname -a),) + platform = win +else ifneq ($(findstring MINGW,$(shell uname -a)),) + platform = win +else ifneq ($(findstring Darwin,$(shell uname -a)),) + platform = osx +else ifneq ($(findstring win,$(shell uname -a)),) + platform = win +endif +endif + +CC ?= gcc +CXX ?= g++ +AS ?= as +CC_AS ?= $(CC) +CFLAGS ?= + +TARGET_NAME := picodrive + +ifeq ($(platform), unix) + TARGET := $(TARGET_NAME)_libretro.so + SHARED := -shared +else ifeq ($(platform), osx) + TARGET := $(TARGET_NAME)_libretro.dylib + SHARED := -dynamiclib +else ifeq ($(platform), ios) + TARGET := $(TARGET_NAME)_libretro_ios.dylib + SHARED := -dynamiclib + + CC = clang -arch armv7 -isysroot $(IOSSDK) + CXX = clang++ -arch armv7 -isysroot $(IOSSDK) + CC_AS = perl ./tools/gas-preprocessor.pl $(CC) + CFLAGS += -mcpu=cortex-a8 -mtune=cortex-a8 -mfpu=neon -marm + ASFLAGS += -mcpu=cortex-a8 -mtune=cortex-a8 -mfpu=neon + CFLAGS += -DIOS + + ARCH := arm + HAVE_NEON = 1 + USE_DYNAREC = 1 +else ifeq ($(platform), ps3) + TARGET := $(TARGET_NAME)_libretro_ps3.a + CC = $(CELL_SDK)/host-win32/ppu/bin/ppu-lv2-gcc.exe + AR = $(CELL_SDK)/host-win32/ppu/bin/ppu-lv2-ar.exe + CFLAGS += -DBLARGG_BIG_ENDIAN=1 -D__ppc__ +else ifeq ($(platform), sncps3) + TARGET := $(TARGET_NAME)_libretro_ps3.a + CC = $(CELL_SDK)/host-win32/sn/bin/ps3ppusnc.exe + AR = $(CELL_SDK)/host-win32/sn/bin/ps3snarl.exe + CFLAGS += -DBLARGG_BIG_ENDIAN=1 -D__ppc__ +else ifeq ($(platform), psl1ght) + TARGET := $(TARGET_NAME)_libretro_psl1ght.a + CC = $(PS3DEV)/ppu/bin/ppu-gcc$(EXE_EXT) + AR = $(PS3DEV)/ppu/bin/ppu-ar$(EXE_EXT) + CFLAGS += -DBLARGG_BIG_ENDIAN=1 -D__ppc__ +else ifeq ($(platform), psp1) + TARGET := $(TARGET_NAME)_libretro_psp1.a + CC = psp-gcc$(EXE_EXT) + AR = psp-ar$(EXE_EXT) + CFLAGS += -DPSP -G0 +else ifeq ($(platform), xenon) + TARGET := $(TARGET_NAME)_libretro_xenon360.a + CC = xenon-gcc$(EXE_EXT) + AR = xenon-ar$(EXE_EXT) + CFLAGS += -D__LIBXENON__ -m32 -D__ppc__ +else ifeq ($(platform), ngc) + TARGET := $(TARGET_NAME)_libretro_ngc.a + CC = $(DEVKITPPC)/bin/powerpc-eabi-gcc$(EXE_EXT) + AR = $(DEVKITPPC)/bin/powerpc-eabi-ar$(EXE_EXT) + CFLAGS += -DGEKKO -DHW_DOL -mrvl -mcpu=750 -meabi -mhard-float -DBLARGG_BIG_ENDIAN=1 -D__ppc__ +else ifeq ($(platform), wii) + TARGET := libretro_$(TARGET_NAME)_wii.a + CC = $(DEVKITPPC)/bin/powerpc-eabi-gcc$(EXE_EXT) + AR = $(DEVKITPPC)/bin/powerpc-eabi-ar$(EXE_EXT) + CFLAGS += -DGEKKO -DHW_RVL -mrvl -mcpu=750 -meabi -mhard-float -DBLARGG_BIG_ENDIAN=1 -D__ppc__ +else ifeq ($(platform), qnx) + TARGET := $(TARGET_NAME)_libretro_qnx.so + CC = qcc -Vgcc_ntoarmv7le + CC_AS = $(CC) + CFLAGS += -DBASE_ADDR_FIXED=0 -D__BLACKBERRY_QNX__ -marm -mcpu=cortex-a9 -mtune=cortex-a9 -mfpu=neon -mfloat-abi=softfp + ASFLAGS += -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=softfp + + ARCH = arm + HAVE_NEON = 1 + USE_DYNAREC = 1 +else ifeq ($(platform), arm) + TARGET := $(TARGET_NAME)_libretro.so + SHARED := -shared -Wl,--no-undefined + CFLAGS += -marm -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp + ASFLAGS += -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp + + ARCH = arm + HAVE_NEON = 1 + USE_DYNAREC = 1 +else + TARGET := $(TARGET_NAME)_retro.dll + CC = gcc + LD_FLAGS := -fPIC + SHARED := -shared -static-libgcc -static-libstdc++ + CFLAGS += -D__WIN32__ -D__WIN32_LIBRETRO__ +endif + +CFLAGS += -fPIC +LDLIBS += -lm +SHARED ?= -shared +LDFLAGS += $(SHARED) + +PLATFORM = libretro +NO_CONFIG_MAK = yes + +include Makefile diff --git a/pico/32x/32x.c b/pico/32x/32x.c index a452f83..6217d2d 100644 --- a/pico/32x/32x.c +++ b/pico/32x/32x.c @@ -69,6 +69,8 @@ void Pico32xStartup(void) PREG8(Pico32xMem->sh2_peri_regs[0], 4) = PREG8(Pico32xMem->sh2_peri_regs[1], 4) = 0x84; // SCI SSR + rendstatus_old = -1; + emu_32x_startup(); } diff --git a/pico/pico.c b/pico/pico.c index 2a0677d..6a065e6 100644 --- a/pico/pico.c +++ b/pico/pico.c @@ -220,6 +220,9 @@ void PicoLoopPrepare(void) // FIXME: PAL has 313 scanlines.. scanlines_total = Pico.m.pal ? 312 : 262; + Pico.m.dirtyPal = 1; + rendstatus_old = -1; + if (PicoAHW & PAHW_32X) p32x_timers_recalc(); } diff --git a/pico/pico.h b/pico/pico.h index 1a8b712..6c6e7c5 100644 --- a/pico/pico.h +++ b/pico/pico.h @@ -19,6 +19,9 @@ extern "C" { #endif +// message log +extern void lprintf(const char *fmt, ...); + // external funcs for Sega/Mega CD extern int mp3_get_bitrate(void *f, int size); extern void mp3_start_play(void *f, int pos); @@ -27,7 +30,7 @@ extern void mp3_update(int *buffer, int length, int stereo); // this function should write-back d-cache and invalidate i-cache // on a mem region [start_addr, end_addr) // used by dynarecs -extern void cache_flush_d_inval_i(const void *start_addr, const void *end_addr); +extern void cache_flush_d_inval_i(void *start_addr, void *end_addr); // attempt to alloc mem at specified address. // alloc anywhere else if that fails (callers should handle that) diff --git a/pico/pico_int.h b/pico/pico_int.h index 3e4083f..c206aa8 100644 --- a/pico/pico_int.h +++ b/pico/pico_int.h @@ -800,7 +800,6 @@ static __inline int isspace_(int c) #define EL_ANOMALY 0x80000000 /* some unexpected conditions (during emulation) */ #if EL_LOGMASK -extern void lprintf(const char *fmt, ...); #define elprintf(w,f,...) \ { \ if ((w) & EL_LOGMASK) \ diff --git a/platform/common/emu.c b/platform/common/emu.c index bce9b78..d92c598 100644 --- a/platform/common/emu.c +++ b/platform/common/emu.c @@ -144,9 +144,15 @@ void emu_status_msg(const char *format, ...) notice_msg_time = plat_get_ticks_ms(); } -static const char * const biosfiles_us[] = { "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303" }; -static const char * const biosfiles_eu[] = { "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303" }; -static const char * const biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" }; +static const char * const biosfiles_us[] = { + "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U" +}; +static const char * const biosfiles_eu[] = { + "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E" +}; +static const char * const biosfiles_jp[] = { + "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" +}; static const char *find_bios(int *region, const char *cd_fname) { @@ -916,9 +922,6 @@ void emu_32x_startup(void) { plat_video_toggle_renderer(0, 0); // HACK system_announce(); - - // force mode change event - rendstatus_old = -1; } void emu_reset_game(void) @@ -1286,10 +1289,6 @@ void emu_loop(void) fpsbuff[0] = 0; - /* make sure we are in correct mode */ - Pico.m.dirtyPal = 1; - rendstatus_old = -1; - PicoLoopPrepare(); // prepare CD buffer diff --git a/platform/libpicofe b/platform/libpicofe index b57ed12..c2981fc 160000 --- a/platform/libpicofe +++ b/platform/libpicofe @@ -1 +1 @@ -Subproject commit b57ed12e39ff8b0b678d18e5a729ea54ffb0542a +Subproject commit c2981fc0ee15d3b1aff69901550fda32460bb1b1 diff --git a/platform/libretro.c b/platform/libretro.c new file mode 100644 index 0000000..40dc394 --- /dev/null +++ b/platform/libretro.c @@ -0,0 +1,588 @@ +/* + * libretro core glue for PicoDrive + * (C) notaz, 2013 + * + * This work is licensed under the terms of MAME license. + * See COPYING file in the top-level directory. + */ + +#define _GNU_SOURCE 1 // mremap +#include +#include +#include +#include +#ifdef __MACH__ +#include +#endif + +#include +#include "common/input_pico.h" +#include "common/version.h" +#include "libretro.h" + +static retro_video_refresh_t video_cb; +static retro_input_poll_t input_poll_cb; +static retro_input_state_t input_state_cb; +static retro_environment_t environ_cb; +static retro_audio_sample_batch_t audio_batch_cb; + +static FILE *emu_log; + +#define VOUT_MAX_WIDTH 320 +#define VOUT_MAX_HEIGHT 240 +static void *vout_buf; +static int vout_width, vout_height; + +static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; + +// FIXME: these 2 shouldn't be here +static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)]; +unsigned char *PicoDraw2FB = PicoDraw2FB_; + +static void snd_write(int len); + +#ifdef _WIN32 +#define SLASH '\\' +#else +#define SLASH '/' +#endif + +/* functions called by the core */ + +void cache_flush_d_inval_i(void *start, void *end) +{ +#ifdef __arm__ +#if defined(__BLACKBERRY_QNX__) + msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE); +#elif defined(__MACH__) + size_t len = (char *)end - (char *)start; + sys_dcache_flush(start, len); + sys_icache_invalidate(start, len); +#else + __clear_cache(start, end); +#endif +#endif +} + +void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) +{ + int flags = MAP_PRIVATE | MAP_ANONYMOUS; + void *req, *ret; + + req = (void *)addr; + ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); + if (ret == MAP_FAILED) + return NULL; + + if (addr != 0 && ret != (void *)addr) { + lprintf("warning: wanted to map @%08lx, got %p\n", + addr, ret); + + if (is_fixed) { + munmap(ret, size); + return NULL; + } + } + + return ret; +} + +void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) +{ + void *ret = mremap(ptr, oldsize, newsize, 0); + if (ret == MAP_FAILED) + return NULL; + + return ret; +} + +void plat_munmap(void *ptr, size_t size) +{ + if (ptr != NULL) + munmap(ptr, size); +} + +void emu_video_mode_change(int start_line, int line_count, int is_32cols) +{ + memset(vout_buf, 0, 320 * 240 * 2); + vout_width = is_32cols ? 256 : 320; + PicoDrawSetOutBuf(vout_buf, vout_width * 2); +} + +void emu_32x_startup(void) +{ + PicoDrawSetOutFormat(PDF_RGB555, 1); +} + +#ifndef ANDROID + +void lprintf(const char *fmt, ...) +{ + va_list list; + + va_start(list, fmt); + fprintf(emu_log, "PicoDrive: "); + vfprintf(emu_log, fmt, list); + va_end(list); + fflush(emu_log); +} + +#else + +#include + +void lprintf(const char *fmt, ...) +{ + va_list list; + + va_start(list, fmt); + __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list); + va_end(list); +} + +#endif + +/* libretro */ +void retro_set_environment(retro_environment_t cb) +{ + static const struct retro_variable vars[] = { + //{ "region", "Region; Auto|NTSC|PAL" }, + { NULL, NULL }, + }; + + environ_cb = cb; + + cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); +} + +void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } +void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } +void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } +void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } +void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } + +unsigned retro_api_version(void) +{ + return RETRO_API_VERSION; +} + +void retro_set_controller_port_device(unsigned port, unsigned device) +{ +} + +void retro_get_system_info(struct retro_system_info *info) +{ + memset(info, 0, sizeof(*info)); + info->library_name = "PicoDrive"; + info->library_version = VERSION; + info->valid_extensions = "bin|gen|smd|32x|cue|iso|sms"; + info->need_fullpath = true; +} + +void retro_get_system_av_info(struct retro_system_av_info *info) +{ + memset(info, 0, sizeof(*info)); + info->timing.fps = Pico.m.pal ? 50 : 60; + info->timing.sample_rate = 44100; + info->geometry.base_width = 320; + info->geometry.base_height = 240; + info->geometry.max_width = VOUT_MAX_WIDTH; + info->geometry.max_height = VOUT_MAX_HEIGHT; + info->geometry.aspect_ratio = 4.0 / 3.0; +} + +/* savestates - TODO */ +size_t retro_serialize_size(void) +{ + return 0; +} + +bool retro_serialize(void *data, size_t size) +{ + return false; +} + +bool retro_unserialize(const void *data, size_t size) +{ + return false; +} + +/* cheats - TODO */ +void retro_cheat_reset(void) +{ +} + +void retro_cheat_set(unsigned index, bool enabled, const char *code) +{ +} + +/* multidisk support */ +static bool disk_ejected; +static unsigned int disk_current_index; +static unsigned int disk_count; +static struct disks_state { + char *fname; +} disks[8]; + +static bool disk_set_eject_state(bool ejected) +{ + // TODO? + disk_ejected = ejected; + return true; +} + +static bool disk_get_eject_state(void) +{ + return disk_ejected; +} + +static unsigned int disk_get_image_index(void) +{ + return disk_current_index; +} + +static bool disk_set_image_index(unsigned int index) +{ + cd_img_type cd_type; + int ret; + + if (index >= sizeof(disks) / sizeof(disks[0])) + return false; + + if (disks[index].fname == NULL) { + lprintf("missing disk #%u\n", index); + + // RetroArch specifies "no disk" with index == count, + // so don't fail here.. + disk_current_index = index; + return true; + } + + lprintf("switching to disk %u: \"%s\"\n", index, + disks[index].fname); + + ret = -1; + cd_type = PicoCdCheck(disks[index].fname, NULL); + if (cd_type != CIT_NOT_CD) + ret = Insert_CD(disks[index].fname, cd_type); + if (ret != 0) { + lprintf("Load failed, invalid CD image?\n"); + return 0; + } + + disk_current_index = index; + return true; +} + +static unsigned int disk_get_num_images(void) +{ + return disk_count; +} + +static bool disk_replace_image_index(unsigned index, + const struct retro_game_info *info) +{ + bool ret = true; + + if (index >= sizeof(disks) / sizeof(disks[0])) + return false; + + if (disks[index].fname != NULL) + free(disks[index].fname); + disks[index].fname = NULL; + + if (info != NULL) { + disks[index].fname = strdup(info->path); + if (index == disk_current_index) + ret = disk_set_image_index(index); + } + + return ret; +} + +static bool disk_add_image_index(void) +{ + if (disk_count >= sizeof(disks) / sizeof(disks[0])) + return false; + + disk_count++; + return true; +} + +static struct retro_disk_control_callback disk_control = { + .set_eject_state = disk_set_eject_state, + .get_eject_state = disk_get_eject_state, + .get_image_index = disk_get_image_index, + .set_image_index = disk_set_image_index, + .get_num_images = disk_get_num_images, + .replace_image_index = disk_replace_image_index, + .add_image_index = disk_add_image_index, +}; + +static void disk_tray_open(void) +{ + lprintf("cd tray open\n"); + disk_ejected = 1; +} + +static void disk_tray_close(void) +{ + lprintf("cd tray close\n"); + disk_ejected = 0; +} + + +static const char * const biosfiles_us[] = { + "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U" +}; +static const char * const biosfiles_eu[] = { + "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E" +}; +static const char * const biosfiles_jp[] = { + "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" +}; + +static void make_system_path(char *buf, size_t buf_size, + const char *name, const char *ext) +{ + const char *dir = NULL; + + if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { + snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); + } + else { + snprintf(buf, buf_size, "%s%s", name, ext); + } +} + +static const char *find_bios(int *region, const char *cd_fname) +{ + const char * const *files; + static char path[256]; + int i, count; + FILE *f = NULL; + + if (*region == 4) { // US + files = biosfiles_us; + count = sizeof(biosfiles_us) / sizeof(char *); + } else if (*region == 8) { // EU + files = biosfiles_eu; + count = sizeof(biosfiles_eu) / sizeof(char *); + } else if (*region == 1 || *region == 2) { + files = biosfiles_jp; + count = sizeof(biosfiles_jp) / sizeof(char *); + } else { + return NULL; + } + + for (i = 0; i < count; i++) + { + make_system_path(path, sizeof(path), files[i], ".bin"); + f = fopen(path, "rb"); + if (f != NULL) + break; + + make_system_path(path, sizeof(path), files[i], ".zip"); + f = fopen(path, "rb"); + if (f != NULL) + break; + } + + if (f != NULL) { + lprintf("using bios: %s\n", path); + fclose(f); + return path; + } + + return NULL; +} + +bool retro_load_game(const struct retro_game_info *info) +{ + enum media_type_e media_type; + static char carthw_path[256]; + size_t i; + + enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; + if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { + lprintf("RGB565 suppot required, sorry\n"); + return false; + } + + if (info == NULL || info->path == NULL) { + lprintf("info->path required\n"); + return false; + } + + for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { + if (disks[i].fname != NULL) { + free(disks[i].fname); + disks[i].fname = NULL; + } + } + + disk_current_index = 0; + disk_count = 1; + disks[0].fname = strdup(info->path); + + make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); + + media_type = PicoLoadMedia(info->path, carthw_path, + find_bios, NULL); + + switch (media_type) { + case PM_BAD_DETECT: + lprintf("Failed to detect ROM/CD image type.\n"); + return false; + case PM_BAD_CD: + lprintf("Invalid CD image\n"); + return false; + case PM_BAD_CD_NO_BIOS: + lprintf("Missing BIOS\n"); + return false; + case PM_ERROR: + lprintf("Load error\n"); + return false; + default: + break; + } + + PicoLoopPrepare(); + + PicoWriteSound = snd_write; + memset(sndBuffer, 0, sizeof(sndBuffer)); + PsndOut = sndBuffer; + PsndRerate(1); + + return true; +} + +bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) +{ + return false; +} + +void retro_unload_game(void) +{ +} + +unsigned retro_get_region(void) +{ + return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; +} + +void *retro_get_memory_data(unsigned id) +{ + if (id != RETRO_MEMORY_SAVE_RAM) + return NULL; + + if (PicoAHW & PAHW_MCD) + return Pico_mcd->bram; + else + return SRam.data; +} + +size_t retro_get_memory_size(unsigned id) +{ + if (id != RETRO_MEMORY_SAVE_RAM) + return 0; + + if (PicoAHW & PAHW_MCD) + // bram + return 0x2000; + else + return SRam.size; +} + +void retro_reset(void) +{ + PicoReset(); +} + +static const unsigned short retro_pico_map[] = { + [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, + [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, + [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, + [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, + [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, + [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, + [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, + [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, + [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, + [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, + [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, + [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, +}; +#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) + +static void snd_write(int len) +{ + audio_batch_cb(PsndOut, len / 4); +} + +void retro_run(void) +{ + bool updated = false; + int pad, i; + + if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) + ; //update_variables(true); + + input_poll_cb(); + + PicoPad[0] = PicoPad[1] = 0; + for (pad = 0; pad < 2; pad++) + for (i = 0; i < RETRO_PICO_MAP_LEN; i++) + if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) + PicoPad[pad] |= retro_pico_map[i]; + + PicoFrame(); + + video_cb(vout_buf, vout_width, vout_height, vout_width * 2); +} + +void retro_init(void) +{ + int level; + +#ifdef IOS + emu_log = fopen("/User/Documents/PicoDrive.log", "w"); + if (emu_log == NULL) + emu_log = fopen("PicoDrive.log", "w"); + if (emu_log == NULL) +#endif + emu_log = stdout; + + level = 0; + environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); + + environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); + + PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 + | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC + | POPT_ACC_SPRITES|POPT_EN_32X|POPT_EN_PWM + | POPT_DIS_32C_BORDER; + PsndRate = 44100; + PicoAutoRgnOrder = 0x184; // US, EU, JP + PicoCDBuffers = 0; + + p32x_msh2_multiplier = MSH2_MULTI_DEFAULT; + p32x_ssh2_multiplier = SSH2_MULTI_DEFAULT; + + vout_width = 320; + vout_height = 240; + vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); + + PicoInit(); + PicoDrawSetOutFormat(PDF_RGB555, 1); + PicoDrawSetOutBuf(vout_buf, vout_width * 2); + + //PicoMessage = plat_status_msg_busy_next; + PicoMCDopenTray = disk_tray_open; + PicoMCDcloseTray = disk_tray_close; +} + +void retro_deinit(void) +{ + PicoExit(); +} diff --git a/platform/libretro.h b/platform/libretro.h new file mode 100644 index 0000000..ff4f4fd --- /dev/null +++ b/platform/libretro.h @@ -0,0 +1,787 @@ +/* Copyright (C) 2010-2013 The RetroArch team + * + * --------------------------------------------------------------------------------------- + * The following license statement only applies to this libretro API header (libretro.h). + * --------------------------------------------------------------------------------------- + * + * Permission is hereby granted, free of charge, + * to any person obtaining a copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, + * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef LIBRETRO_H__ +#define LIBRETRO_H__ + +#include +#include +#include + +// Hack applied for MSVC when compiling in C89 mode as it isn't C99 compliant. +#ifdef __cplusplus +extern "C" { +#else +#if defined(_MSC_VER) && !defined(SN_TARGET_PS3) && !defined(__cplusplus) +#define bool unsigned char +#define true 1 +#define false 0 +#else +#include +#endif +#endif + +// Used for checking API/ABI mismatches that can break libretro implementations. +// It is not incremented for compatible changes to the API. +#define RETRO_API_VERSION 1 + +// Libretro's fundamental device abstractions. +#define RETRO_DEVICE_MASK 0xff +#define RETRO_DEVICE_NONE 0 + +// The JOYPAD is called RetroPad. It is essentially a Super Nintendo controller, +// but with additional L2/R2/L3/R3 buttons, similar to a PS1 DualShock. +#define RETRO_DEVICE_JOYPAD 1 + +// The mouse is a simple mouse, similar to Super Nintendo's mouse. +// X and Y coordinates are reported relatively to last poll (poll callback). +// It is up to the libretro implementation to keep track of where the mouse pointer is supposed to be on the screen. +// The frontend must make sure not to interfere with its own hardware mouse pointer. +#define RETRO_DEVICE_MOUSE 2 + +// KEYBOARD device lets one poll for raw key pressed. +// It is poll based, so input callback will return with the current pressed state. +#define RETRO_DEVICE_KEYBOARD 3 + +// Lightgun X/Y coordinates are reported relatively to last poll, similar to mouse. +#define RETRO_DEVICE_LIGHTGUN 4 + +// The ANALOG device is an extension to JOYPAD (RetroPad). +// Similar to DualShock it adds two analog sticks. +// This is treated as a separate device type as it returns values in the full analog range +// of [-0x8000, 0x7fff]. Positive X axis is right. Positive Y axis is down. +// Only use ANALOG type when polling for analog values of the axes. +#define RETRO_DEVICE_ANALOG 5 + +// Abstracts the concept of a pointing mechanism, e.g. touch. +// This allows libretro to query in absolute coordinates where on the screen a mouse (or something similar) is being placed. +// For a touch centric device, coordinates reported are the coordinates of the press. +// +// Coordinates in X and Y are reported as: +// [-0x7fff, 0x7fff]: -0x7fff corresponds to the far left/top of the screen, +// and 0x7fff corresponds to the far right/bottom of the screen. +// The "screen" is here defined as area that is passed to the frontend and later displayed on the monitor. +// The frontend is free to scale/resize this screen as it sees fit, however, +// (X, Y) = (-0x7fff, -0x7fff) will correspond to the top-left pixel of the game image, etc. +// +// To check if the pointer coordinates are valid (e.g. a touch display actually being touched), +// PRESSED returns 1 or 0. +// If using a mouse, PRESSED will usually correspond to the left mouse button. +// PRESSED will only return 1 if the pointer is inside the game screen. +// +// For multi-touch, the index variable can be used to successively query more presses. +// If index = 0 returns true for _PRESSED, coordinates can be extracted +// with _X, _Y for index = 0. One can then query _PRESSED, _X, _Y with index = 1, and so on. +// Eventually _PRESSED will return false for an index. No further presses are registered at this point. +#define RETRO_DEVICE_POINTER 6 + +// These device types are specializations of the base types above. +// They should only be used in retro_set_controller_type() to inform libretro implementations +// about use of a very specific device type. +// +// In input state callback, however, only the base type should be used in the 'device' field. +#define RETRO_DEVICE_JOYPAD_MULTITAP ((1 << 8) | RETRO_DEVICE_JOYPAD) +#define RETRO_DEVICE_LIGHTGUN_SUPER_SCOPE ((1 << 8) | RETRO_DEVICE_LIGHTGUN) +#define RETRO_DEVICE_LIGHTGUN_JUSTIFIER ((2 << 8) | RETRO_DEVICE_LIGHTGUN) +#define RETRO_DEVICE_LIGHTGUN_JUSTIFIERS ((3 << 8) | RETRO_DEVICE_LIGHTGUN) + +// Buttons for the RetroPad (JOYPAD). +// The placement of these is equivalent to placements on the Super Nintendo controller. +// L2/R2/L3/R3 buttons correspond to the PS1 DualShock. +#define RETRO_DEVICE_ID_JOYPAD_B 0 +#define RETRO_DEVICE_ID_JOYPAD_Y 1 +#define RETRO_DEVICE_ID_JOYPAD_SELECT 2 +#define RETRO_DEVICE_ID_JOYPAD_START 3 +#define RETRO_DEVICE_ID_JOYPAD_UP 4 +#define RETRO_DEVICE_ID_JOYPAD_DOWN 5 +#define RETRO_DEVICE_ID_JOYPAD_LEFT 6 +#define RETRO_DEVICE_ID_JOYPAD_RIGHT 7 +#define RETRO_DEVICE_ID_JOYPAD_A 8 +#define RETRO_DEVICE_ID_JOYPAD_X 9 +#define RETRO_DEVICE_ID_JOYPAD_L 10 +#define RETRO_DEVICE_ID_JOYPAD_R 11 +#define RETRO_DEVICE_ID_JOYPAD_L2 12 +#define RETRO_DEVICE_ID_JOYPAD_R2 13 +#define RETRO_DEVICE_ID_JOYPAD_L3 14 +#define RETRO_DEVICE_ID_JOYPAD_R3 15 + +// Index / Id values for ANALOG device. +#define RETRO_DEVICE_INDEX_ANALOG_LEFT 0 +#define RETRO_DEVICE_INDEX_ANALOG_RIGHT 1 +#define RETRO_DEVICE_ID_ANALOG_X 0 +#define RETRO_DEVICE_ID_ANALOG_Y 1 + +// Id values for MOUSE. +#define RETRO_DEVICE_ID_MOUSE_X 0 +#define RETRO_DEVICE_ID_MOUSE_Y 1 +#define RETRO_DEVICE_ID_MOUSE_LEFT 2 +#define RETRO_DEVICE_ID_MOUSE_RIGHT 3 + +// Id values for LIGHTGUN types. +#define RETRO_DEVICE_ID_LIGHTGUN_X 0 +#define RETRO_DEVICE_ID_LIGHTGUN_Y 1 +#define RETRO_DEVICE_ID_LIGHTGUN_TRIGGER 2 +#define RETRO_DEVICE_ID_LIGHTGUN_CURSOR 3 +#define RETRO_DEVICE_ID_LIGHTGUN_TURBO 4 +#define RETRO_DEVICE_ID_LIGHTGUN_PAUSE 5 +#define RETRO_DEVICE_ID_LIGHTGUN_START 6 + +// Id values for POINTER. +#define RETRO_DEVICE_ID_POINTER_X 0 +#define RETRO_DEVICE_ID_POINTER_Y 1 +#define RETRO_DEVICE_ID_POINTER_PRESSED 2 + +// Returned from retro_get_region(). +#define RETRO_REGION_NTSC 0 +#define RETRO_REGION_PAL 1 + +// Passed to retro_get_memory_data/size(). +// If the memory type doesn't apply to the implementation NULL/0 can be returned. +#define RETRO_MEMORY_MASK 0xff + +// Regular save ram. This ram is usually found on a game cartridge, backed up by a battery. +// If save game data is too complex for a single memory buffer, +// the SYSTEM_DIRECTORY environment callback can be used. +#define RETRO_MEMORY_SAVE_RAM 0 + +// Some games have a built-in clock to keep track of time. +// This memory is usually just a couple of bytes to keep track of time. +#define RETRO_MEMORY_RTC 1 + +// System ram lets a frontend peek into a game systems main RAM. +#define RETRO_MEMORY_SYSTEM_RAM 2 + +// Video ram lets a frontend peek into a game systems video RAM (VRAM). +#define RETRO_MEMORY_VIDEO_RAM 3 + +// Special memory types. +#define RETRO_MEMORY_SNES_BSX_RAM ((1 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_BSX_PRAM ((2 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_SUFAMI_TURBO_A_RAM ((3 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_SUFAMI_TURBO_B_RAM ((4 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_GAME_BOY_RAM ((5 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_GAME_BOY_RTC ((6 << 8) | RETRO_MEMORY_RTC) + +// Special game types passed into retro_load_game_special(). +// Only used when multiple ROMs are required. +#define RETRO_GAME_TYPE_BSX 0x101 +#define RETRO_GAME_TYPE_BSX_SLOTTED 0x102 +#define RETRO_GAME_TYPE_SUFAMI_TURBO 0x103 +#define RETRO_GAME_TYPE_SUPER_GAME_BOY 0x104 + +// Keysyms used for ID in input state callback when polling RETRO_KEYBOARD. +enum retro_key +{ + RETROK_UNKNOWN = 0, + RETROK_FIRST = 0, + RETROK_BACKSPACE = 8, + RETROK_TAB = 9, + RETROK_CLEAR = 12, + RETROK_RETURN = 13, + RETROK_PAUSE = 19, + RETROK_ESCAPE = 27, + RETROK_SPACE = 32, + RETROK_EXCLAIM = 33, + RETROK_QUOTEDBL = 34, + RETROK_HASH = 35, + RETROK_DOLLAR = 36, + RETROK_AMPERSAND = 38, + RETROK_QUOTE = 39, + RETROK_LEFTPAREN = 40, + RETROK_RIGHTPAREN = 41, + RETROK_ASTERISK = 42, + RETROK_PLUS = 43, + RETROK_COMMA = 44, + RETROK_MINUS = 45, + RETROK_PERIOD = 46, + RETROK_SLASH = 47, + RETROK_0 = 48, + RETROK_1 = 49, + RETROK_2 = 50, + RETROK_3 = 51, + RETROK_4 = 52, + RETROK_5 = 53, + RETROK_6 = 54, + RETROK_7 = 55, + RETROK_8 = 56, + RETROK_9 = 57, + RETROK_COLON = 58, + RETROK_SEMICOLON = 59, + RETROK_LESS = 60, + RETROK_EQUALS = 61, + RETROK_GREATER = 62, + RETROK_QUESTION = 63, + RETROK_AT = 64, + RETROK_LEFTBRACKET = 91, + RETROK_BACKSLASH = 92, + RETROK_RIGHTBRACKET = 93, + RETROK_CARET = 94, + RETROK_UNDERSCORE = 95, + RETROK_BACKQUOTE = 96, + RETROK_a = 97, + RETROK_b = 98, + RETROK_c = 99, + RETROK_d = 100, + RETROK_e = 101, + RETROK_f = 102, + RETROK_g = 103, + RETROK_h = 104, + RETROK_i = 105, + RETROK_j = 106, + RETROK_k = 107, + RETROK_l = 108, + RETROK_m = 109, + RETROK_n = 110, + RETROK_o = 111, + RETROK_p = 112, + RETROK_q = 113, + RETROK_r = 114, + RETROK_s = 115, + RETROK_t = 116, + RETROK_u = 117, + RETROK_v = 118, + RETROK_w = 119, + RETROK_x = 120, + RETROK_y = 121, + RETROK_z = 122, + RETROK_DELETE = 127, + + RETROK_KP0 = 256, + RETROK_KP1 = 257, + RETROK_KP2 = 258, + RETROK_KP3 = 259, + RETROK_KP4 = 260, + RETROK_KP5 = 261, + RETROK_KP6 = 262, + RETROK_KP7 = 263, + RETROK_KP8 = 264, + RETROK_KP9 = 265, + RETROK_KP_PERIOD = 266, + RETROK_KP_DIVIDE = 267, + RETROK_KP_MULTIPLY = 268, + RETROK_KP_MINUS = 269, + RETROK_KP_PLUS = 270, + RETROK_KP_ENTER = 271, + RETROK_KP_EQUALS = 272, + + RETROK_UP = 273, + RETROK_DOWN = 274, + RETROK_RIGHT = 275, + RETROK_LEFT = 276, + RETROK_INSERT = 277, + RETROK_HOME = 278, + RETROK_END = 279, + RETROK_PAGEUP = 280, + RETROK_PAGEDOWN = 281, + + RETROK_F1 = 282, + RETROK_F2 = 283, + RETROK_F3 = 284, + RETROK_F4 = 285, + RETROK_F5 = 286, + RETROK_F6 = 287, + RETROK_F7 = 288, + RETROK_F8 = 289, + RETROK_F9 = 290, + RETROK_F10 = 291, + RETROK_F11 = 292, + RETROK_F12 = 293, + RETROK_F13 = 294, + RETROK_F14 = 295, + RETROK_F15 = 296, + + RETROK_NUMLOCK = 300, + RETROK_CAPSLOCK = 301, + RETROK_SCROLLOCK = 302, + RETROK_RSHIFT = 303, + RETROK_LSHIFT = 304, + RETROK_RCTRL = 305, + RETROK_LCTRL = 306, + RETROK_RALT = 307, + RETROK_LALT = 308, + RETROK_RMETA = 309, + RETROK_LMETA = 310, + RETROK_LSUPER = 311, + RETROK_RSUPER = 312, + RETROK_MODE = 313, + RETROK_COMPOSE = 314, + + RETROK_HELP = 315, + RETROK_PRINT = 316, + RETROK_SYSREQ = 317, + RETROK_BREAK = 318, + RETROK_MENU = 319, + RETROK_POWER = 320, + RETROK_EURO = 321, + RETROK_UNDO = 322, + + RETROK_LAST, + + RETROK_DUMMY = INT_MAX // Ensure sizeof(enum) == sizeof(int) +}; + +enum retro_mod +{ + RETROKMOD_NONE = 0x0000, + + RETROKMOD_SHIFT = 0x01, + RETROKMOD_CTRL = 0x02, + RETROKMOD_ALT = 0x04, + RETROKMOD_META = 0x08, + + RETROKMOD_NUMLOCK = 0x10, + RETROKMOD_CAPSLOCK = 0x20, + RETROKMOD_SCROLLOCK = 0x40, + + RETROKMOD_DUMMY = INT_MAX // Ensure sizeof(enum) == sizeof(int) +}; + +// If set, this call is not part of the public libretro API yet. It can change or be removed at any time. +#define RETRO_ENVIRONMENT_EXPERIMENTAL 0x10000 + +// Environment commands. +#define RETRO_ENVIRONMENT_SET_ROTATION 1 // const unsigned * -- + // Sets screen rotation of graphics. + // Is only implemented if rotation can be accelerated by hardware. + // Valid values are 0, 1, 2, 3, which rotates screen by 0, 90, 180, 270 degrees + // counter-clockwise respectively. + // +#define RETRO_ENVIRONMENT_GET_OVERSCAN 2 // bool * -- + // Boolean value whether or not the implementation should use overscan, or crop away overscan. + // +#define RETRO_ENVIRONMENT_GET_CAN_DUPE 3 // bool * -- + // Boolean value whether or not frontend supports frame duping, + // passing NULL to video frame callback. + // +// Environ 4, 5 are no longer supported (GET_VARIABLE / SET_VARIABLES), and reserved to avoid possible ABI clash. +#define RETRO_ENVIRONMENT_SET_MESSAGE 6 // const struct retro_message * -- + // Sets a message to be displayed in implementation-specific manner for a certain amount of 'frames'. + // Should not be used for trivial messages, which should simply be logged to stderr. +#define RETRO_ENVIRONMENT_SHUTDOWN 7 // N/A (NULL) -- + // Requests the frontend to shutdown. + // Should only be used if game has a specific + // way to shutdown the game from a menu item or similar. + // +#define RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL 8 + // const unsigned * -- + // Gives a hint to the frontend how demanding this implementation + // is on a system. E.g. reporting a level of 2 means + // this implementation should run decently on all frontends + // of level 2 and up. + // + // It can be used by the frontend to potentially warn + // about too demanding implementations. + // + // The levels are "floating", but roughly defined as: + // 0: Low-powered embedded devices such as Raspberry Pi + // 1: 6th generation consoles, such as Wii/Xbox 1, and phones, tablets, etc. + // 2: 7th generation consoles, such as PS3/360, with sub-par CPUs. + // 3: Modern desktop/laptops with reasonably powerful CPUs. + // 4: High-end desktops with very powerful CPUs. + // + // This function can be called on a per-game basis, + // as certain games an implementation can play might be + // particularily demanding. + // If called, it should be called in retro_load_game(). + // +#define RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY 9 + // const char ** -- + // Returns the "system" directory of the frontend. + // This directory can be used to store system specific ROMs such as BIOSes, configuration data, etc. + // The returned value can be NULL. + // If so, no such directory is defined, + // and it's up to the implementation to find a suitable directory. + // +#define RETRO_ENVIRONMENT_SET_PIXEL_FORMAT 10 + // const enum retro_pixel_format * -- + // Sets the internal pixel format used by the implementation. + // The default pixel format is RETRO_PIXEL_FORMAT_0RGB1555. + // This pixel format however, is deprecated (see enum retro_pixel_format). + // If the call returns false, the frontend does not support this pixel format. + // This function should be called inside retro_load_game() or retro_get_system_av_info(). + // +#define RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS 11 + // const struct retro_input_descriptor * -- + // Sets an array of retro_input_descriptors. + // It is up to the frontend to present this in a usable way. + // The array is terminated by retro_input_descriptor::description being set to NULL. + // This function can be called at any time, but it is recommended to call it as early as possible. +#define RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK 12 + // const struct retro_keyboard_callback * -- + // Sets a callback function used to notify core about keyboard events. + // +#define RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE 13 + // const struct retro_disk_control_callback * -- + // Sets an interface which frontend can use to eject and insert disk images. + // This is used for games which consist of multiple images and must be manually + // swapped out by the user (e.g. PSX). +#define RETRO_ENVIRONMENT_SET_HW_RENDER (14 | RETRO_ENVIRONMENT_EXPERIMENTAL) + // struct retro_hw_render_callback * -- + // NOTE: This call is currently very experimental, and should not be considered part of the public API. + // The interface could be changed or removed at any time. + // Sets an interface to let a libretro core render with hardware acceleration. + // Should be called in retro_load_game(). + // If successful, libretro cores will be able to render to a frontend-provided framebuffer. + // The size of this framebuffer will be at least as large as max_width/max_height provided in get_av_info(). + // If HW rendering is used, pass only RETRO_HW_FRAME_BUFFER_VALID or NULL to retro_video_refresh_t. +#define RETRO_ENVIRONMENT_GET_VARIABLE 15 + // struct retro_variable * -- + // Interface to aquire user-defined information from environment + // that cannot feasibly be supported in a multi-system way. + // 'key' should be set to a key which has already been set by SET_VARIABLES. + // 'data' will be set to a value or NULL. + // +#define RETRO_ENVIRONMENT_SET_VARIABLES 16 + // const struct retro_variable * -- + // Allows an implementation to signal the environment + // which variables it might want to check for later using GET_VARIABLE. + // This allows the frontend to present these variables to a user dynamically. + // This should be called as early as possible (ideally in retro_set_environment). + // + // 'data' points to an array of retro_variable structs terminated by a { NULL, NULL } element. + // retro_variable::key should be namespaced to not collide with other implementations' keys. E.g. A core called 'foo' should use keys named as 'foo_option'. + // retro_variable::value should contain a human readable description of the key as well as a '|' delimited list of expected values. + // The number of possible options should be very limited, i.e. it should be feasible to cycle through options without a keyboard. + // First entry should be treated as a default. + // + // Example entry: + // { "foo_option", "Speed hack coprocessor X; false|true" } + // + // Text before first ';' is description. This ';' must be followed by a space, and followed by a list of possible values split up with '|'. + // Only strings are operated on. The possible values will generally be displayed and stored as-is by the frontend. + // +#define RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE 17 + // bool * -- + // Result is set to true if some variables are updated by + // frontend since last call to RETRO_ENVIRONMENT_GET_VARIABLE. + // Variables should be queried with GET_VARIABLE. + // +#define RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME 18 + // const bool * -- + // If true, the libretro implementation supports calls to retro_load_game() with NULL as argument. + // Used by cores which can run without particular game data. + // This should be called within retro_set_environment() only. + + +// Pass this to retro_video_refresh_t if rendering to hardware. +// Passing NULL to retro_video_refresh_t is still a frame dupe as normal. +#define RETRO_HW_FRAME_BUFFER_VALID ((void*)-1) + +// Invalidates the current HW context. +// If called, all GPU resources must be reinitialized. +// Usually called when frontend reinits video driver. +// Also called first time video driver is initialized, allowing libretro core to init resources. +typedef void (*retro_hw_context_reset_t)(void); +// Gets current framebuffer which is to be rendered to. Could change every frame potentially. +typedef uintptr_t (*retro_hw_get_current_framebuffer_t)(void); + +// Get a symbol from HW context. +typedef void (*retro_proc_address_t)(void); +typedef retro_proc_address_t (*retro_hw_get_proc_address_t)(const char *sym); + +enum retro_hw_context_type +{ + RETRO_HW_CONTEXT_NONE = 0, + RETRO_HW_CONTEXT_OPENGL, // OpenGL 2.x. Latest version available before 3.x+. + RETRO_HW_CONTEXT_OPENGLES2, // GLES 2.0 + + RETRO_HW_CONTEXT_DUMMY = INT_MAX +}; + +struct retro_hw_render_callback +{ + enum retro_hw_context_type context_type; // Which API to use. Set by libretro core. + retro_hw_context_reset_t context_reset; // Set by libretro core. + retro_hw_get_current_framebuffer_t get_current_framebuffer; // Set by frontend. + retro_hw_get_proc_address_t get_proc_address; // Set by frontend. + bool depth; // Set if render buffers should have depth component attached. +}; + +// Callback type passed in RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK. Called by the frontend in response to keyboard events. +// down is set if the key is being pressed, or false if it is being released. +// keycode is the RETROK value of the char. +// character is the text character of the pressed key. (UTF-32). +// key_modifiers is a set of RETROKMOD values or'ed together. +typedef void (*retro_keyboard_event_t)(bool down, unsigned keycode, uint32_t character, uint16_t key_modifiers); + +struct retro_keyboard_callback +{ + retro_keyboard_event_t callback; +}; + +// Callbacks for RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE. +// Should be set for implementations which can swap out multiple disk images in runtime. +// If the implementation can do this automatically, it should strive to do so. +// However, there are cases where the user must manually do so. +// +// Overview: To swap a disk image, eject the disk image with set_eject_state(true). +// Set the disk index with set_image_index(index). Insert the disk again with set_eject_state(false). + +// If ejected is true, "ejects" the virtual disk tray. +// When ejected, the disk image index can be set. +typedef bool (*retro_set_eject_state_t)(bool ejected); +// Gets current eject state. The initial state is 'not ejected'. +typedef bool (*retro_get_eject_state_t)(void); +// Gets current disk index. First disk is index 0. +// If return value is >= get_num_images(), no disk is currently inserted. +typedef unsigned (*retro_get_image_index_t)(void); +// Sets image index. Can only be called when disk is ejected. +// The implementation supports setting "no disk" by using an index >= get_num_images(). +typedef bool (*retro_set_image_index_t)(unsigned index); +// Gets total number of images which are available to use. +typedef unsigned (*retro_get_num_images_t)(void); +// +// Replaces the disk image associated with index. +// Arguments to pass in info have same requirements as retro_load_game(). +// Virtual disk tray must be ejected when calling this. +// Replacing a disk image with info = NULL will remove the disk image from the internal list. +// As a result, calls to get_image_index() can change. +// +// E.g. replace_image_index(1, NULL), and previous get_image_index() returned 4 before. +// Index 1 will be removed, and the new index is 3. +struct retro_game_info; +typedef bool (*retro_replace_image_index_t)(unsigned index, const struct retro_game_info *info); +// Adds a new valid index (get_num_images()) to the internal disk list. +// This will increment subsequent return values from get_num_images() by 1. +// This image index cannot be used until a disk image has been set with replace_image_index. +typedef bool (*retro_add_image_index_t)(void); + +struct retro_disk_control_callback +{ + retro_set_eject_state_t set_eject_state; + retro_get_eject_state_t get_eject_state; + + retro_get_image_index_t get_image_index; + retro_set_image_index_t set_image_index; + retro_get_num_images_t get_num_images; + + retro_replace_image_index_t replace_image_index; + retro_add_image_index_t add_image_index; +}; + +enum retro_pixel_format +{ + // 0RGB1555, native endian. 0 bit must be set to 0. + // This pixel format is default for compatibility concerns only. + // If a 15/16-bit pixel format is desired, consider using RGB565. + RETRO_PIXEL_FORMAT_0RGB1555 = 0, + + // XRGB8888, native endian. X bits are ignored. + RETRO_PIXEL_FORMAT_XRGB8888 = 1, + + // RGB565, native endian. This pixel format is the recommended format to use if a 15/16-bit format is desired + // as it is the pixel format that is typically available on a wide range of low-power devices. + // It is also natively supported in APIs like OpenGL ES. + RETRO_PIXEL_FORMAT_RGB565 = 2, + + // Ensure sizeof() == sizeof(int). + RETRO_PIXEL_FORMAT_UNKNOWN = INT_MAX +}; + +struct retro_message +{ + const char *msg; // Message to be displayed. + unsigned frames; // Duration in frames of message. +}; + +// Describes how the libretro implementation maps a libretro input bind +// to its internal input system through a human readable string. +// This string can be used to better let a user configure input. +struct retro_input_descriptor +{ + // Associates given parameters with a description. + unsigned port; + unsigned device; + unsigned index; + unsigned id; + + const char *description; // Human readable description for parameters. + // The pointer must remain valid until retro_unload_game() is called. +}; + +struct retro_system_info +{ + // All pointers are owned by libretro implementation, and pointers must remain valid until retro_deinit() is called. + + const char *library_name; // Descriptive name of library. Should not contain any version numbers, etc. + const char *library_version; // Descriptive version of core. + + const char *valid_extensions; // A string listing probably rom extensions the core will be able to load, separated with pipe. + // I.e. "bin|rom|iso". + // Typically used for a GUI to filter out extensions. + + bool need_fullpath; // If true, retro_load_game() is guaranteed to provide a valid pathname in retro_game_info::path. + // ::data and ::size are both invalid. + // If false, ::data and ::size are guaranteed to be valid, but ::path might not be valid. + // This is typically set to true for libretro implementations that must load from file. + // Implementations should strive for setting this to false, as it allows the frontend to perform patching, etc. + + bool block_extract; // If true, the frontend is not allowed to extract any archives before loading the real ROM. + // Necessary for certain libretro implementations that load games from zipped archives. +}; + +struct retro_game_geometry +{ + unsigned base_width; // Nominal video width of game. + unsigned base_height; // Nominal video height of game. + unsigned max_width; // Maximum possible width of game. + unsigned max_height; // Maximum possible height of game. + + float aspect_ratio; // Nominal aspect ratio of game. If aspect_ratio is <= 0.0, + // an aspect ratio of base_width / base_height is assumed. + // A frontend could override this setting if desired. +}; + +struct retro_system_timing +{ + double fps; // FPS of video content. + double sample_rate; // Sampling rate of audio. +}; + +struct retro_system_av_info +{ + struct retro_game_geometry geometry; + struct retro_system_timing timing; +}; + +struct retro_variable +{ + const char *key; // Variable to query in RETRO_ENVIRONMENT_GET_VARIABLE. + // If NULL, obtains the complete environment string if more complex parsing is necessary. + // The environment string is formatted as key-value pairs delimited by semicolons as so: + // "key1=value1;key2=value2;..." + const char *value; // Value to be obtained. If key does not exist, it is set to NULL. +}; + +struct retro_game_info +{ + const char *path; // Path to game, UTF-8 encoded. Usually used as a reference. + // May be NULL if rom was loaded from stdin or similar. + // retro_system_info::need_fullpath guaranteed that this path is valid. + const void *data; // Memory buffer of loaded game. Will be NULL if need_fullpath was set. + size_t size; // Size of memory buffer. + const char *meta; // String of implementation specific meta-data. +}; + +// Callbacks +// +// Environment callback. Gives implementations a way of performing uncommon tasks. Extensible. +typedef bool (*retro_environment_t)(unsigned cmd, void *data); + +// Render a frame. Pixel format is 15-bit 0RGB1555 native endian unless changed (see RETRO_ENVIRONMENT_SET_PIXEL_FORMAT). +// Width and height specify dimensions of buffer. +// Pitch specifices length in bytes between two lines in buffer. +// For performance reasons, it is highly recommended to have a frame that is packed in memory, i.e. pitch == width * byte_per_pixel. +// Certain graphic APIs, such as OpenGL ES, do not like textures that are not packed in memory. +typedef void (*retro_video_refresh_t)(const void *data, unsigned width, unsigned height, size_t pitch); + +// Renders a single audio frame. Should only be used if implementation generates a single sample at a time. +// Format is signed 16-bit native endian. +typedef void (*retro_audio_sample_t)(int16_t left, int16_t right); +// Renders multiple audio frames in one go. One frame is defined as a sample of left and right channels, interleaved. +// I.e. int16_t buf[4] = { l, r, l, r }; would be 2 frames. +// Only one of the audio callbacks must ever be used. +typedef size_t (*retro_audio_sample_batch_t)(const int16_t *data, size_t frames); + +// Polls input. +typedef void (*retro_input_poll_t)(void); +// Queries for input for player 'port'. device will be masked with RETRO_DEVICE_MASK. +// Specialization of devices such as RETRO_DEVICE_JOYPAD_MULTITAP that have been set with retro_set_controller_port_device() +// will still use the higher level RETRO_DEVICE_JOYPAD to request input. +typedef int16_t (*retro_input_state_t)(unsigned port, unsigned device, unsigned index, unsigned id); + +// Sets callbacks. retro_set_environment() is guaranteed to be called before retro_init(). +// The rest of the set_* functions are guaranteed to have been called before the first call to retro_run() is made. +void retro_set_environment(retro_environment_t); +void retro_set_video_refresh(retro_video_refresh_t); +void retro_set_audio_sample(retro_audio_sample_t); +void retro_set_audio_sample_batch(retro_audio_sample_batch_t); +void retro_set_input_poll(retro_input_poll_t); +void retro_set_input_state(retro_input_state_t); + +// Library global initialization/deinitialization. +void retro_init(void); +void retro_deinit(void); + +// Must return RETRO_API_VERSION. Used to validate ABI compatibility when the API is revised. +unsigned retro_api_version(void); + +// Gets statically known system info. Pointers provided in *info must be statically allocated. +// Can be called at any time, even before retro_init(). +void retro_get_system_info(struct retro_system_info *info); + +// Gets information about system audio/video timings and geometry. +// Can be called only after retro_load_game() has successfully completed. +// NOTE: The implementation of this function might not initialize every variable if needed. +// E.g. geom.aspect_ratio might not be initialized if core doesn't desire a particular aspect ratio. +void retro_get_system_av_info(struct retro_system_av_info *info); + +// Sets device to be used for player 'port'. +void retro_set_controller_port_device(unsigned port, unsigned device); + +// Resets the current game. +void retro_reset(void); + +// Runs the game for one video frame. +// During retro_run(), input_poll callback must be called at least once. +// +// If a frame is not rendered for reasons where a game "dropped" a frame, +// this still counts as a frame, and retro_run() should explicitly dupe a frame if GET_CAN_DUPE returns true. +// In this case, the video callback can take a NULL argument for data. +void retro_run(void); + +// Returns the amount of data the implementation requires to serialize internal state (save states). +// Beetween calls to retro_load_game() and retro_unload_game(), the returned size is never allowed to be larger than a previous returned value, to +// ensure that the frontend can allocate a save state buffer once. +size_t retro_serialize_size(void); + +// Serializes internal state. If failed, or size is lower than retro_serialize_size(), it should return false, true otherwise. +bool retro_serialize(void *data, size_t size); +bool retro_unserialize(const void *data, size_t size); + +void retro_cheat_reset(void); +void retro_cheat_set(unsigned index, bool enabled, const char *code); + +// Loads a game. +bool retro_load_game(const struct retro_game_info *game); + +// Loads a "special" kind of game. Should not be used except in extreme cases. +bool retro_load_game_special( + unsigned game_type, + const struct retro_game_info *info, size_t num_info +); + +// Unloads a currently loaded game. +void retro_unload_game(void); + +// Gets region of game. +unsigned retro_get_region(void); + +// Gets region of memory. +void *retro_get_memory_data(unsigned id); +size_t retro_get_memory_size(unsigned id); + +#ifdef __cplusplus +} +#endif + +#endif