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Libretro: Add rumble support

This commit is contained in:
Jeffrey Pfau 2015-07-12 15:49:27 -07:00
parent 386da2accd
commit 18ec3de2e2
1 changed files with 41 additions and 1 deletions
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42
src/platform/libretro/libretro.c
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@ -12,9 +12,11 @@
#include "gba/serialize.h"
#include "gba/supervisor/overrides.h"
#include "gba/video.h"
#include "util/circle-buffer.h"
#include "util/vfs.h"
#define SAMPLES 1024
#define RUMBLE_PWM 35
static retro_environment_t environCallback;
static retro_video_refresh_t videoCallback;
@ -22,11 +24,13 @@ static retro_audio_sample_batch_t audioCallback;
static retro_input_poll_t inputPollCallback;
static retro_input_state_t inputCallback;
static retro_log_printf_t logCallback;
static retro_set_rumble_state_t rumbleCallback;
static void GBARetroLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args);
static void _postAudioBuffer(struct GBAAVStream*, struct GBAAudio* audio);
static void _postVideoFrame(struct GBAAVStream*, struct GBAVideoRenderer* renderer);
static void _setRumble(struct GBARumble* rumble, int enable);
static struct GBA gba;
static struct ARMCore cpu;
@ -36,6 +40,9 @@ static void* data;
static struct VFile* save;
static void* savedata;
static struct GBAAVStream stream;
static int rumbleLevel;
static struct CircleBuffer rumbleHistory;
static struct GBARumble rumble;
unsigned retro_api_version(void) {
return RETRO_API_VERSION;
@ -112,7 +119,15 @@ void retro_init(void) {
environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
// TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
// TODO: RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE
struct retro_rumble_interface rumbleInterface;
if (environCallback(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumbleInterface)) {
rumbleCallback = rumbleInterface.set_rumble_state;
CircleBufferInit(&rumbleHistory, RUMBLE_PWM);
rumble.setRumble = _setRumble;
} else {
rumbleCallback = 0;
}
struct retro_log_callback log;
if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
@ -132,6 +147,9 @@ void retro_init(void) {
gba.logHandler = GBARetroLog;
gba.stream = &stream;
gba.idleOptimization = IDLE_LOOP_REMOVE; // TODO: Settings
if (rumbleCallback) {
gba.rumble = &rumble;
}
rom = 0;
GBAVideoSoftwareRendererCreate(&renderer);
@ -176,6 +194,10 @@ void retro_run(void) {
void retro_reset(void) {
ARMReset(&cpu);
if (rumbleCallback) {
CircleBufferClear(&rumbleHistory);
}
}
bool retro_load_game(const struct retro_game_info* game) {
@ -219,6 +241,7 @@ void retro_unload_game(void) {
save = 0;
free(savedata);
savedata = 0;
CircleBufferDeinit(&rumbleHistory);
}
size_t retro_serialize_size(void) {
@ -317,10 +340,12 @@ void GBARetroLog(struct GBAThread* thread, enum GBALogLevel level, const char* f
case GBA_LOG_INFO:
case GBA_LOG_GAME_ERROR:
case GBA_LOG_SWI:
case GBA_LOG_STATUS:
retroLevel = RETRO_LOG_INFO;
break;
case GBA_LOG_DEBUG:
case GBA_LOG_STUB:
case GBA_LOG_SIO:
retroLevel = RETRO_LOG_DEBUG;
break;
}
@ -352,3 +377,18 @@ static void _postVideoFrame(struct GBAAVStream* stream, struct GBAVideoRenderer*
renderer->getPixels(renderer, &stride, &pixels);
videoCallback(pixels, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, BYTES_PER_PIXEL * stride);
}
static void _setRumble(struct GBARumble* rumble, int enable) {
UNUSED(rumble);
if (!rumbleCallback) {
return;
}
rumbleLevel += enable;
if (CircleBufferSize(&rumbleHistory) == RUMBLE_PWM) {
int8_t oldLevel;
CircleBufferRead8(&rumbleHistory, &oldLevel);
rumbleLevel -= oldLevel;
}
CircleBufferWrite8(&rumbleHistory, enable);
rumbleCallback(0, RETRO_RUMBLE_STRONG, rumbleLevel * 0xFFFF / RUMBLE_PWM);
}