mirror of https://github.com/mgba-emu/mgba.git
Libretro: Add initial libretro version
This commit is contained in:
Jeffrey Pfau
parent
eb21dd722f
commit
cf71d39bf0
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@ -12,6 +12,7 @@ set(USE_BLIP ON CACHE BOOL "Whether or not to enable blip_buf support")
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set(USE_LZMA ON CACHE BOOL "Whether or not to enable 7-Zip support")
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set(BUILD_QT ON CACHE BOOL "Build Qt frontend")
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set(BUILD_SDL ON CACHE BOOL "Build SDL frontend")
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set(BUILD_LIBRETRO OFF CACHE BOOL "Build libretro core")
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set(BUILD_PERF OFF CACHE BOOL "Build performance profiling tool")
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set(BUILD_STATIC OFF CACHE BOOL "Build a static library")
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set(BUILD_SHARED ON CACHE BOOL "Build a shared library")
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@ -309,6 +310,12 @@ if(BUILD_QT)
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add_subdirectory(${CMAKE_SOURCE_DIR}/src/platform/qt ${CMAKE_BINARY_DIR}/qt)
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endif()
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if(BUILD_LIBRETRO)
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file(GLOB RETRO_SRC ${CMAKE_SOURCE_DIR}/src/platform/libretro/*.c)
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add_library(${BINARY_NAME}-libretro SHARED ${RETRO_SRC})
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target_link_libraries(${BINARY_NAME}-libretro ${BINARY_NAME} m ${DEBUGGER_LIB} ${OS_LIB} ${DEPENDENCY_LIB})
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endif()
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if(BUILD_PERF)
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set(PERF_SRC ${CMAKE_SOURCE_DIR}/src/platform/perf-main.c)
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if(UNIX AND NOT APPLE)
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@ -355,6 +362,7 @@ message(STATUS " Better audio resampling: ${USE_BLIP}")
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message(STATUS "Frontend summary:")
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message(STATUS " Qt: ${BUILD_QT}")
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message(STATUS " SDL (${SDL_VERSION}): ${BUILD_SDL}")
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message(STATUS " Libretro core: ${BUILD_LIBRETRO}")
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message(STATUS " Profiling: ${BUILD_PERF}")
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message(STATUS "Library summary:")
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message(STATUS " Static: ${BUILD_STATIC}")
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@ -0,0 +1,267 @@
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#include "libretro.h"
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#include "gba/gba.h"
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#include "gba/renderers/video-software.h"
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#include "gba/serialize.h"
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#include "gba/video.h"
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#include "util/vfs.h"
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static retro_environment_t environCallback;
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static retro_video_refresh_t videoCallback;
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static retro_input_poll_t inputPollCallback;
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static retro_input_state_t inputCallback;
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static retro_log_printf_t logCallback;
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static void GBARetroLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args);
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static struct GBA gba;
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static struct ARMCore cpu;
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static struct GBAVideoSoftwareRenderer renderer;
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static struct VFile* rom;
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static struct VFile* save;
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static void* savedata;
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unsigned retro_api_version(void) {
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return RETRO_API_VERSION;
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}
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void retro_set_environment(retro_environment_t environ) {
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environCallback = environ;
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}
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void retro_set_video_refresh(retro_video_refresh_t video) {
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videoCallback = video;
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}
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void retro_set_audio_sample(retro_audio_sample_t audio) {
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UNUSED(audio);
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}
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void retro_set_audio_sample_batch(retro_audio_sample_batch_t audioBatch) {
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UNUSED(audioBatch);
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}
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void retro_set_input_poll(retro_input_poll_t inputPoll) {
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inputPollCallback = inputPoll;
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}
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void retro_set_input_state(retro_input_state_t input) {
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inputCallback = input;
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}
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void retro_get_system_info(struct retro_system_info* info) {
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info->need_fullpath = false;
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info->valid_extensions = "gba";
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info->library_version = PROJECT_VERSION;
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info->library_name = PROJECT_NAME;
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info->block_extract = false;
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}
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void retro_get_system_av_info(struct retro_system_av_info* info) {
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info->geometry.base_width = VIDEO_HORIZONTAL_PIXELS;
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info->geometry.base_height = VIDEO_VERTICAL_PIXELS;
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info->geometry.max_width = VIDEO_HORIZONTAL_PIXELS;
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info->geometry.max_height = VIDEO_VERTICAL_PIXELS;
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info->timing.fps = GBA_ARM7TDMI_FREQUENCY / (float) VIDEO_TOTAL_LENGTH;
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info->timing.sample_rate = 32768;
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}
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void retro_init(void) {
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enum retro_pixel_format fmt;
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#ifdef COLOR_16_BIT
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#ifdef COLOR_5_6_5
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fmt = RETRO_PIXEL_FORMAT_RGB565;
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#else
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fmt = RETRO_PIXEL_FORMAT_0RGB1555;
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#endif
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#else
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fmt = RETRO_PIXEL_FORMAT_XRGB8888;
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#endif
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environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
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struct retro_input_descriptor inputDescriptors[] = {
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
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{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" }
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};
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environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
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// TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
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// TODO: RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE
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struct retro_log_callback log;
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if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
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logCallback = log.log;
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} else {
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logCallback = 0;
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}
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GBACreate(&gba);
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ARMSetComponents(&cpu, &gba.d, 0, 0);
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ARMInit(&cpu);
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gba.logLevel = 0; // TODO: Settings
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gba.logHandler = GBARetroLog;
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gba.idleOptimization = IDLE_LOOP_REMOVE; // TODO: Settings
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rom = 0;
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GBAVideoSoftwareRendererCreate(&renderer);
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renderer.outputBuffer = malloc(256 * VIDEO_VERTICAL_PIXELS * BYTES_PER_PIXEL);
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renderer.outputBufferStride = 256;
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GBAVideoAssociateRenderer(&gba.video, &renderer.d);
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}
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void retro_deinit(void) {
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GBADestroy(&gba);
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}
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void retro_run(void) {
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int keys;
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gba.keySource = &keys;
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inputPollCallback();
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keys = 0;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)) << 0;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)) << 1;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)) << 2;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)) << 3;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)) << 4;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)) << 5;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)) << 6;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)) << 7;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)) << 8;
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keys |= (!!inputCallback(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L)) << 9;
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int frameCount = gba.video.frameCounter;
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while (gba.video.frameCounter == frameCount) {
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ARMRunLoop(&cpu);
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}
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videoCallback(renderer.outputBuffer, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, BYTES_PER_PIXEL * 256);
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}
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void retro_reset(void) {
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ARMReset(&cpu);
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}
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bool retro_load_game(const struct retro_game_info* game) {
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if (game->data) {
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rom = VFileFromMemory((void*) game->data, game->size); // TODO: readonly VFileMem
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} else {
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rom = VFileOpen(game->path, O_RDONLY);
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}
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if (!rom) {
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return false;
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}
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if (!GBAIsROM(rom)) {
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return false;
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}
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// TODO
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save = 0;
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savedata = 0;
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GBALoadROM(&gba, rom, save, game->path);
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ARMReset(&cpu);
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return true;
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}
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void retro_unload_game(void) {
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// TODO
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}
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size_t retro_serialize_size(void) {
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return sizeof(struct GBASerializedState);
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}
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bool retro_serialize(void* data, size_t size) {
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if (size != retro_serialize_size()) {
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return false;
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}
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GBASerialize(&gba, data);
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return true;
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}
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bool retro_unserialize(const void* data, size_t size) {
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if (size != retro_serialize_size()) {
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return false;
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}
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GBADeserialize(&gba, data);
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return true;
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}
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void retro_cheat_reset(void) {
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// TODO: Cheats
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}
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void retro_cheat_set(unsigned index, bool enabled, const char* code) {
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// TODO: Cheats
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UNUSED(index);
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UNUSED(enabled);
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UNUSED(code);
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}
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unsigned retro_get_region(void) {
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return RETRO_REGION_NTSC; // TODO: This isn't strictly true
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}
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void retro_set_controller_port_device(unsigned port, unsigned device) {
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UNUSED(port);
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UNUSED(device);
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}
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bool retro_load_game_special(unsigned game_type, const struct retro_game_info* info, size_t num_info) {
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UNUSED(game_type);
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UNUSED(info);
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UNUSED(num_info);
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return false;
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}
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void* retro_get_memory_data(unsigned id) {
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// TODO
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UNUSED(id);
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return 0;
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}
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size_t retro_get_memory_size(unsigned id) {
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// TODO
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UNUSED(id);
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return 0;
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}
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void GBARetroLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args) {
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UNUSED(thread);
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if (!logCallback) {
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return;
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}
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char message[128];
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vsnprintf(message, sizeof(message), format, args);
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enum retro_log_level retroLevel = RETRO_LOG_INFO;
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switch (level) {
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case GBA_LOG_ALL:
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case GBA_LOG_ERROR:
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case GBA_LOG_FATAL:
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retroLevel = RETRO_LOG_ERROR;
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break;
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case GBA_LOG_WARN:
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retroLevel = RETRO_LOG_WARN;
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break;
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case GBA_LOG_INFO:
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case GBA_LOG_GAME_ERROR:
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case GBA_LOG_SWI:
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retroLevel = RETRO_LOG_INFO;
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break;
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case GBA_LOG_DEBUG:
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case GBA_LOG_STUB:
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retroLevel = RETRO_LOG_DEBUG;
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break;
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}
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logCallback(retroLevel, "%s\n", message);
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}
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