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mgba
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Libretro: Game Boy support

This commit is contained in:
Jeffrey Pfau 2016-02-15 23:13:25 -08:00
parent 061601672a
commit 0a6b66248b
1 changed files with 73 additions and 49 deletions
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122
src/platform/libretro/libretro.c
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@ -8,10 +8,15 @@
#include "util/common.h"
#include "core/core.h"
#ifdef M_CORE_GB
#include "gb/core.h"
#include "gb/gb.h"
#endif
#ifdef M_CORE_GBA
#include "gba/cheats.h"
#include "gba/core.h"
#include "gba/renderers/video-software.h"
#include "gba/serialize.h"
#endif
#include "util/circle-buffer.h"
#include "util/memory.h"
#include "util/vfs.h"
@ -125,21 +130,23 @@ void retro_set_input_state(retro_input_state_t input) {
}
void retro_get_system_info(struct retro_system_info* info) {
info->need_fullpath = false;
info->valid_extensions = "gba";
info->library_version = projectVersion;
info->library_name = projectName;
info->block_extract = false;
info->need_fullpath = false;
info->valid_extensions = "gba|gb|gbc";
info->library_version = projectVersion;
info->library_name = projectName;
info->block_extract = false;
}
void retro_get_system_av_info(struct retro_system_av_info* info) {
info->geometry.base_width = VIDEO_HORIZONTAL_PIXELS;
info->geometry.base_height = VIDEO_VERTICAL_PIXELS;
info->geometry.max_width = VIDEO_HORIZONTAL_PIXELS;
info->geometry.max_height = VIDEO_VERTICAL_PIXELS;
info->geometry.aspect_ratio = 3.0 / 2.0;
info->timing.fps = GBA_ARM7TDMI_FREQUENCY / (float) VIDEO_TOTAL_LENGTH;
info->timing.sample_rate = 32768;
unsigned width, height;
core->desiredVideoDimensions(core, &width, &height);
info->geometry.base_width = width;
info->geometry.base_height = height;
info->geometry.max_width = width;
info->geometry.max_height = height;
info->geometry.aspect_ratio = width / (double) height;
info->timing.fps = GBA_ARM7TDMI_FREQUENCY / (float) VIDEO_TOTAL_LENGTH;
info->timing.sample_rate = 32768;
}
void retro_init(void) {
@ -202,43 +209,9 @@ void retro_init(void) {
stream.postAudioFrame = 0;
stream.postAudioBuffer = _postAudioBuffer;
stream.postVideoFrame = 0;
core = GBACoreCreate();
mCoreInitConfig(core, NULL);
core->init(core);
struct GBA* gba = core->board;
core->setAVStream(core, &stream);
if (rumbleCallback) {
gba->rumble = &rumble;
}
gba->luminanceSource = &lux;
const char* sysDir = 0;
if (environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir)) {
char biosPath[PATH_MAX];
snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, "gba_bios.bin");
struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
if (bios) {
core->loadBIOS(core, bios, 0);
}
}
outputBuffer = malloc(256 * VIDEO_VERTICAL_PIXELS * BYTES_PER_PIXEL);
core->setVideoBuffer(core, outputBuffer, 256);
core->setAudioBufferSize(core, SAMPLES);
blip_set_rates(core->getAudioChannel(core, 0), GBA_ARM7TDMI_FREQUENCY, 32768);
blip_set_rates(core->getAudioChannel(core, 1), GBA_ARM7TDMI_FREQUENCY, 32768);
GBACheatDeviceCreate(&cheats);
GBACheatAttachDevice(gba, &cheats);
GBACheatSetInit(&cheatSet, "libretro");
GBACheatAddSet(&cheats, &cheatSet);
}
void retro_deinit(void) {
core->deinit(core);
GBACheatRemoveSet(&cheats, &cheatSet);
GBACheatDeviceDestroy(&cheats);
GBACheatSetDeinit(&cheatSet);
@ -295,7 +268,9 @@ void retro_run(void) {
}
core->runFrame(core);
videoCallback(outputBuffer, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, BYTES_PER_PIXEL * 256);
unsigned width, height;
core->desiredVideoDimensions(core, &width, &height);
videoCallback(outputBuffer, width, height, BYTES_PER_PIXEL * 256);
}
void retro_reset(void) {
@ -320,11 +295,59 @@ bool retro_load_game(const struct retro_game_info* game) {
if (!rom) {
return false;
}
if (!GBAIsROM(rom)) {
core = NULL;
#ifdef M_CORE_GBA
if (!core && GBAIsROM(rom)) {
core = GBACoreCreate();
}
#endif
#ifdef M_CORE_GB
if (!core && GBIsROM(rom)) {
core = GBCoreCreate();
}
#endif
if (!core) {
rom->close(rom);
mappedMemoryFree(data, game->size);
return false;
}
mCoreInitConfig(core, NULL);
core->init(core);
core->setAVStream(core, &stream);
outputBuffer = malloc(256 * VIDEO_VERTICAL_PIXELS * BYTES_PER_PIXEL);
core->setVideoBuffer(core, outputBuffer, 256);
core->setAudioBufferSize(core, SAMPLES);
blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
#ifdef M_CORE_GBA
if (core->platform(core) == PLATFORM_GBA) {
struct GBA* gba = core->board;
if (rumbleCallback) {
gba->rumble = &rumble;
}
gba->luminanceSource = &lux;
const char* sysDir = 0;
if (environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir)) {
char biosPath[PATH_MAX];
snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, "gba_bios.bin");
struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
if (bios) {
core->loadBIOS(core, bios, 0);
}
}
GBACheatDeviceCreate(&cheats);
GBACheatAttachDevice(gba, &cheats);
GBACheatSetInit(&cheatSet, "libretro");
GBACheatAddSet(&cheats, &cheatSet);
}
#endif
savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
@ -337,6 +360,7 @@ bool retro_load_game(const struct retro_game_info* game) {
}
void retro_unload_game(void) {
core->deinit(core);
mappedMemoryFree(data, dataSize);
data = 0;
mappedMemoryFree(savedata, SIZE_CART_FLASH1M);