void GBAAudioInit(struct GBAAudio* audio, size_t samples) {
audio->samples = samples;
#if RESAMPLE_LIBRARY != RESAMPLE_BLIP_BUF
CircleBufferInit(&audio->left, samples * sizeof(int16_t));
CircleBufferInit(&audio->right, samples * sizeof(int16_t));
#else
audio->left = blip_new(BLIP_BUFFER_SIZE);
audio->right = blip_new(BLIP_BUFFER_SIZE);
// Guess too large; we hang producing extra samples if we guess too low
blip_set_rates(audio->left, GBA_ARM7TDMI_FREQUENCY, 96000);
blip_set_rates(audio->right, GBA_ARM7TDMI_FREQUENCY, 96000);
#endif
CircleBufferInit(&audio->chA.fifo, GBA_AUDIO_FIFO_SIZE);
CircleBufferInit(&audio->chB.fifo, GBA_AUDIO_FIFO_SIZE);
audio->forceDisableCh[0] = false;
audio->forceDisableCh[1] = false;
audio->forceDisableCh[2] = false;
audio->forceDisableCh[3] = false;
audio->forceDisableChA = false;
audio->forceDisableChB = false;
audio->masterVolume = GBA_AUDIO_VOLUME_MAX;
}
void retro_init(void) {
enum retro_pixel_format fmt;
#ifdef COLOR_16_BIT
#ifdef COLOR_5_6_5
fmt = RETRO_PIXEL_FORMAT_RGB565;
#else
#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
fmt = RETRO_PIXEL_FORMAT_0RGB1555;
#endif
#else
#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
fmt = RETRO_PIXEL_FORMAT_XRGB8888;
#endif
environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
struct retro_input_descriptor inputDescriptors[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 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_R, "R" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" }
};
environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
// TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
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;
}
luxLevel = 0;
lux.readLuminance = _readLux;
lux.sample = _updateLux;
_updateLux(&lux);
struct retro_log_callback log;
if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
logCallback = log.log;
} else {
logCallback = 0;
}
logger.log = GBARetroLog;
mLogSetDefaultLogger(&logger);
stream.videoDimensionsChanged = 0;
stream.postAudioFrame = 0;
stream.postAudioBuffer = _postAudioBuffer;
stream.postVideoFrame = 0;
}
void retro_init(void) {
enum retro_pixel_format fmt;
#ifdef COLOR_16_BIT
#ifdef COLOR_5_6_5
fmt = RETRO_PIXEL_FORMAT_RGB565;
#else
#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
fmt = RETRO_PIXEL_FORMAT_0RGB1555;
#endif
#else
#warning This pixel format is unsupported. Please use -DCOLOR_16-BIT -DCOLOR_5_6_5
fmt = RETRO_PIXEL_FORMAT_XRGB8888;
#endif
environCallback(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt);
struct retro_input_descriptor inputDescriptors[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 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_R, "R" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "Brighten Solar Sensor" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "Darken Solar Sensor" }
};
environCallback(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);
// TODO: RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME when BIOS booting is supported
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;
}
luxLevel = 0;
lux.readLuminance = _readLux;
lux.sample = _updateLux;
_updateLux(&lux);
struct retro_log_callback log;
if (environCallback(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log)) {
logCallback = log.log;
} else {
logCallback = 0;
}
stream.postAudioFrame = 0;
stream.postAudioBuffer = _postAudioBuffer;
stream.postVideoFrame = _postVideoFrame;
GBACreate(&gba);
ARMSetComponents(&cpu, &gba.d, 0, 0);
ARMInit(&cpu);
gba.logLevel = 0; // TODO: Settings
gba.logHandler = GBARetroLog;
gba.stream = &stream;
gba.idleOptimization = IDLE_LOOP_REMOVE; // TODO: Settings
if (rumbleCallback) {
gba.rumble = &rumble;
}
gba.luminanceSource = &lux;
rom = 0;
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");
bios = VFileOpen(biosPath, O_RDONLY);
if (bios) {
GBALoadBIOS(&gba, bios);
}
}
GBAVideoSoftwareRendererCreate(&renderer);
renderer.outputBuffer = malloc(256 * VIDEO_VERTICAL_PIXELS * BYTES_PER_PIXEL);
renderer.outputBufferStride = 256;
GBAVideoAssociateRenderer(&gba.video, &renderer.d);
GBAAudioResizeBuffer(&gba.audio, SAMPLES);
#if RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
blip_set_rates(gba.audio.left, GBA_ARM7TDMI_FREQUENCY, 32768);
blip_set_rates(gba.audio.right, GBA_ARM7TDMI_FREQUENCY, 32768);
#endif
}