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Brad Parker 3 years ago
commit
82c197492c
  1. 139
      Makefile
  2. 2
      Makefile.common
  3. 276
      libretro.c
  4. 2129
      libretro.h
  5. 5
      link.T

139
Makefile

@ -0,0 +1,139 @@
STATIC_LINKING := 0
AR := ar
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
# system platform
system_platform = unix
ifeq ($(shell uname -a),)
EXE_EXT = .exe
system_platform = win
else ifneq ($(findstring Darwin,$(shell uname -a)),)
system_platform = osx
arch = intel
ifeq ($(shell uname -p),powerpc)
arch = ppc
endif
else ifneq ($(findstring MINGW,$(shell uname -a)),)
system_platform = win
endif
CORE_DIR += .
TARGET_NAME := skeleton
LIBM = -lm
ifeq ($(ARCHFLAGS),)
ifeq ($(archs),ppc)
ARCHFLAGS = -arch ppc -arch ppc64
else
ARCHFLAGS = -arch i386 -arch x86_64
endif
endif
ifeq ($(platform), osx)
ifndef ($(NOUNIVERSAL))
CXXFLAGS += $(ARCHFLAGS)
LFLAGS += $(ARCHFLAGS)
endif
endif
ifeq ($(STATIC_LINKING), 1)
EXT := a
endif
ifeq ($(platform), unix)
EXT ?= so
TARGET := $(TARGET_NAME)_libretro.$(EXT)
fpic := -fPIC
SHARED := -shared -Wl,--version-script=$(CORE_DIR)/link.T -Wl,--no-undefined
else ifeq ($(platform), linux-portable)
TARGET := $(TARGET_NAME)_libretro.$(EXT)
fpic := -fPIC -nostdlib
SHARED := -shared -Wl,--version-script=$(CORE_DIR)/link.T
LIBM :=
else ifneq (,$(findstring osx,$(platform)))
TARGET := $(TARGET_NAME)_libretro.dylib
fpic := -fPIC
SHARED := -dynamiclib
else ifneq (,$(findstring ios,$(platform)))
TARGET := $(TARGET_NAME)_libretro_ios.dylib
fpic := -fPIC
SHARED := -dynamiclib
ifeq ($(IOSSDK),)
IOSSDK := $(shell xcodebuild -version -sdk iphoneos Path)
endif
DEFINES := -DIOS
CC = cc -arch armv7 -isysroot $(IOSSDK)
ifeq ($(platform),ios9)
CC += -miphoneos-version-min=8.0
CXXFLAGS += -miphoneos-version-min=8.0
else
CC += -miphoneos-version-min=5.0
CXXFLAGS += -miphoneos-version-min=5.0
endif
else ifneq (,$(findstring qnx,$(platform)))
TARGET := $(TARGET_NAME)_libretro_qnx.so
fpic := -fPIC
SHARED := -shared -Wl,--version-script=$(CORE_DIR)/link.T -Wl,--no-undefined
else ifeq ($(platform), emscripten)
TARGET := $(TARGET_NAME)_libretro_emscripten.bc
fpic := -fPIC
SHARED := -shared -Wl,--version-script=$(CORE_DIR)/link.T -Wl,--no-undefined
else ifeq ($(platform), vita)
TARGET := $(TARGET_NAME)_vita.a
CC = arm-vita-eabi-gcc
AR = arm-vita-eabi-ar
CXXFLAGS += -Wl,-q -Wall -O3
STATIC_LINKING = 1
else
CC = gcc
TARGET := $(TARGET_NAME)_libretro.dll
SHARED := -shared -static-libgcc -static-libstdc++ -s -Wl,--version-script=$(CORE_DIR)/link.T -Wl,--no-undefined
endif
LDFLAGS += $(LIBM)
ifeq ($(DEBUG), 1)
CXXFLAGS += -O0 -g
else
CXXFLAGS += -O3
endif
include Makefile.common
OBJECTS := $(SOURCES_C:.c=.o) $(SOURCES_CXX:.cpp=.o)
CFLAGS += -Wall -D__LIBRETRO__ $(fpic)
CXXFLAGS += -Wall -D__LIBRETRO__ $(fpic)
all: $(TARGET)
$(TARGET): $(OBJECTS)
ifeq ($(STATIC_LINKING), 1)
$(AR) rcs $@ $(OBJECTS)
else
$(CXX) $(fpic) $(SHARED) $(INCLUDES) -o $@ $(OBJECTS) $(LDFLAGS)
endif
%.o: %.c
$(CXX) $(CXXFLAGS) $(fpic) -c -o $@ $<
clean:
rm -f $(OBJECTS) $(TARGET)
.PHONY: clean

2
Makefile.common

@ -0,0 +1,2 @@
SOURCES_C :=
SOURCES_CXX := $(CORE_DIR)/libretro.c

276
libretro.c

@ -0,0 +1,276 @@
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#if defined(_WIN32) && !defined(_XBOX)
#include <windows.h>
#endif
#include "libretro.h"
#define VIDEO_WIDTH 256
#define VIDEO_HEIGHT 384
#define VIDEO_PIXELS VIDEO_WIDTH * VIDEO_HEIGHT
static uint8_t *frame_buf;
static struct retro_log_callback logging;
static retro_log_printf_t log_cb;
static bool use_audio_cb;
static float last_aspect;
static float last_sample_rate;
char retro_base_directory[4096];
char retro_game_path[4096];
static void fallback_log(enum retro_log_level level, const char *fmt, ...)
{
(void)level;
va_list va;
va_start(va, fmt);
vfprintf(stderr, fmt, va);
va_end(va);
}
static retro_environment_t environ_cb;
void retro_init(void)
{
frame_buf = (uint8_t*)malloc(VIDEO_PIXELS * sizeof(uint32_t));
const char *dir = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
{
snprintf(retro_base_directory, sizeof(retro_base_directory), "%s", dir);
}
}
void retro_deinit(void)
{
free(frame_buf);
frame_buf = NULL;
}
unsigned retro_api_version(void)
{
return RETRO_API_VERSION;
}
void retro_set_controller_port_device(unsigned port, unsigned device)
{
log_cb(RETRO_LOG_INFO, "Plugging device %u into port %u.\n", device, port);
}
void retro_get_system_info(struct retro_system_info *info)
{
memset(info, 0, sizeof(*info));
info->library_name = "skeleton";
info->library_version = "0.1";
info->need_fullpath = true;
info->valid_extensions = "";
}
static retro_video_refresh_t video_cb;
static retro_audio_sample_t audio_cb;
static retro_audio_sample_batch_t audio_batch_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
void retro_get_system_av_info(struct retro_system_av_info *info)
{
float aspect = 0.0f;
float sampling_rate = 30000.0f;
info->geometry.base_width = VIDEO_WIDTH;
info->geometry.base_height = VIDEO_HEIGHT;
info->geometry.max_width = VIDEO_WIDTH;
info->geometry.max_height = VIDEO_HEIGHT;
info->geometry.aspect_ratio = aspect;
last_aspect = aspect;
last_sample_rate = sampling_rate;
}
static struct retro_rumble_interface rumble;
void retro_set_environment(retro_environment_t cb)
{
environ_cb = cb;
if (cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &logging))
log_cb = logging.log;
else
log_cb = fallback_log;
static const struct retro_controller_description controllers[] = {
{ "Nintendo DS", RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0) },
};
static const struct retro_controller_info ports[] = {
{ controllers, 1 },
{ NULL, 0 },
};
cb(RETRO_ENVIRONMENT_SET_CONTROLLER_INFO, (void*)ports);
}
void retro_set_audio_sample(retro_audio_sample_t cb)
{
audio_cb = 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;
}
void retro_set_video_refresh(retro_video_refresh_t cb)
{
video_cb = cb;
}
static unsigned x_coord;
static unsigned y_coord;
static unsigned phase;
static int mouse_rel_x;
static int mouse_rel_y;
void retro_reset(void)
{
x_coord = 0;
y_coord = 0;
}
static void update_input(void)
{
}
static void check_variables(void)
{
}
static void audio_callback(void)
{
for (unsigned i = 0; i < 30000 / 60; i++, phase++)
{
int16_t val = 0x800 * sinf(2.0f * M_PI * phase * 300.0f / 30000.0f);
audio_cb(val, val);
}
phase %= 100;
}
static void audio_set_state(bool enable)
{
(void)enable;
}
void retro_run(void)
{
unsigned i;
update_input();
bool updated = false;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
check_variables();
}
bool retro_load_game(const struct retro_game_info *info)
{
struct retro_input_descriptor desc[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 0 },
};
environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_XRGB8888;
if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt))
{
log_cb(RETRO_LOG_INFO, "XRGB8888 is not supported.\n");
return false;
}
snprintf(retro_game_path, sizeof(retro_game_path), "%s", info->path);
struct retro_audio_callback audio_cb = { audio_callback, audio_set_state };
use_audio_cb = environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_CALLBACK, &audio_cb);
check_variables();
(void)info;
return true;
}
void retro_unload_game(void)
{
}
unsigned retro_get_region(void)
{
return RETRO_REGION_NTSC;
}
bool retro_load_game_special(unsigned type, const struct retro_game_info *info, size_t num)
{
return false;
}
size_t retro_serialize_size(void)
{
return false;
}
bool retro_serialize(void *data_, size_t size)
{
return false;
}
bool retro_unserialize(const void *data_, size_t size)
{
return false;
}
void *retro_get_memory_data(unsigned id)
{
(void)id;
return NULL;
}
size_t retro_get_memory_size(unsigned id)
{
(void)id;
return 0;
}
void retro_cheat_reset(void)
{}
void retro_cheat_set(unsigned index, bool enabled, const char *code)
{
(void)index;
(void)enabled;
(void)code;
}

2129
libretro.h

File diff suppressed because it is too large

5
link.T

@ -0,0 +1,5 @@
{
global: retro_*;
local: *;
};
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