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make link cable a runtime option

This commit is contained in:
radius 2018-02-03 15:59:31 -05:00
parent 567936a21d
commit d3a67f9e19
1 changed files with 55 additions and 15 deletions
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70
libretro/libretro.c
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@ -79,7 +79,10 @@ static unsigned screen_layout = 0;
static unsigned audio_out = 0;
static bool geometry_updated = false;
static bool link_single = false;
static bool sameboy_dual = false;
static bool link_cable_emulation = false;
static bool infrared_emulation = false;
signed short soundbuf[1024 * 2];
@ -190,15 +193,17 @@ static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b)
static retro_environment_t environ_cb;
static const struct retro_variable vars[] = {
{ "sameboy_link", "Single Game Link Cable (restart); disabled|enabled" },
{ "sameboy_dual", "Dual Game Boy Mode (restart); disabled|enabled" },
{ "sameboy_color_correction_mode", "Color Correction; off|correct curves|emulate hardware|preserve brightness" },
{ "sameboy_high_pass_filter_mode", "High Pass Filter; off|accurate|remove dc offset" },
{ "sameboy_model", "Emulated Model; Game Boy Color|Game Boy Advance|Game Boy" },
{ NULL }
};
static const struct retro_variable vars_link_single[] = {
{ "sameboy_link", "Single Game Link Cable (restart); disabled|enabled" },
static const struct retro_variable vars_sameboy_dual[] = {
{ "sameboy_dual", "Dual Game Boy Mode (restart); disabled|enabled" },
{ "sameboy_link", "Link Cable Emulation; enabled|disabled" },
{ "sameboy_ir", "Infrared Sensor Emulation; disabled|enabled" },
{ "sameboy_screen_layout", "Screen Layout; top-down|left-right" },
{ "sameboy_audio_output", "Audio output; Game Boy #1|Game Boy #2" },
{ "sameboy_model_1", "Emulated Model for Game Boy #1; Game Boy Color|Game Boy Advance|Game Boy" },
@ -211,6 +216,8 @@ static const struct retro_variable vars_link_single[] = {
};
static const struct retro_variable vars_link_dual[] = {
{ "sameboy_link", "Link Cable Emulation; enbled|disabled" },
{ "sameboy_ir", "Infrared Sensor Emulation; disabled|enabled" },
{ "sameboy_screen_layout", "Screen Layout; top-down|left-right" },
{ "sameboy_audio_output", "Audio output; Game Boy #1|Game Boy #2" },
{ "sameboy_model_1", "Emulated Model for Game Boy #1; Game Boy Color|Game Boy Advance|Game Boy" },
@ -238,14 +245,32 @@ static const struct retro_subsystem_rom_info gb_roms[] = {
};
static const struct retro_subsystem_info subsystems[] = {
{ "2 Player Gameboy Link", "gb_link_2p", gb_roms, 2, RETRO_GAME_TYPE_GAMEBOY_LINK_2P },
{ "2 Player Game Boy Link", "gb_link_2p", gb_roms, 2, RETRO_GAME_TYPE_GAMEBOY_LINK_2P },
{ NULL },
};
static const struct retro_controller_description controllers[] = {
{ "Nintendo Gameboy", RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0) },
{ "Nintendo Game Boy", RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0) },
};
static void set_link_cable_state(bool state)
{
if (state && emulated_devices == 2)
{
GB_set_serial_transfer_start_callback(&gameboy[0], serial_start1);
GB_set_serial_transfer_end_callback(&gameboy[0], serial_end1);
GB_set_serial_transfer_start_callback(&gameboy[1], serial_start2);
GB_set_serial_transfer_end_callback(&gameboy[1], serial_end2);
}
else if (!state)
{
GB_set_serial_transfer_start_callback(&gameboy[0], NULL);
GB_set_serial_transfer_end_callback(&gameboy[0], NULL);
GB_set_serial_transfer_start_callback(&gameboy[1], NULL);
GB_set_serial_transfer_end_callback(&gameboy[1], NULL);
}
}
static void init_for_current_model(void)
{
unsigned i = 0;
@ -290,10 +315,8 @@ static void init_for_current_model(void)
if (emulated_devices == 2)
{
GB_set_vblank_callback(&gameboy[1], (GB_vblank_callback_t) vblank2);
GB_set_serial_transfer_start_callback(&gameboy[0], serial_start1);
GB_set_serial_transfer_end_callback(&gameboy[0], serial_end1);
GB_set_serial_transfer_start_callback(&gameboy[1], serial_start2);
GB_set_serial_transfer_end_callback(&gameboy[1], serial_end2);
if (link_cable_emulation)
set_link_cable_state(true);
}
struct retro_memory_descriptor descs[7];
@ -501,14 +524,29 @@ static void check_variables(bool link)
geometry_updated = true;
}
var.key = "sameboy_link";
var.key = "sameboy_dual";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "enabled") == 0)
link_single = true;
sameboy_dual = true;
else
link_single = false;
sameboy_dual = false;
}
var.key = "sameboy_link";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
bool tmp = link_cable_emulation;
if (strcmp(var.value, "enabled") == 0)
link_cable_emulation = true;
else
link_cable_emulation = false;
if (link_cable_emulation && link_cable_emulation != tmp)
set_link_cable_state(true);
else if (!link_cable_emulation && link_cable_emulation != tmp)
set_link_cable_state(false);
}
var.key = "sameboy_audio_output";
@ -726,10 +764,10 @@ bool retro_load_game(const struct retro_game_info *info)
{
environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
check_variables(false);
if (link_single)
if (sameboy_dual)
{
emulated_devices = 2;
environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars_link_single);
environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars_sameboy_dual);
check_variables(true);
}
@ -768,6 +806,7 @@ bool retro_load_game(const struct retro_game_info *info)
else
log_cb(RETRO_LOG_INFO, "Rumble environment not supported.\n");
check_variables(emulated_devices == 2 ? true : false);
return true;
}
@ -827,6 +866,7 @@ bool retro_load_game_special(unsigned type, const struct retro_game_info *info,
else
log_cb(RETRO_LOG_INFO, "Rumble environment not supported.\n");
check_variables(emulated_devices == 2 ? true : false);
return true;
}