+ // NOTE: Analog buttons were added Nov 2017. Not all front-ends support this
+ // feature (or pre-date it) so we need to handle this in a graceful way.
+
+ // First, try and get an analog value using the new libretro API constant
+ uint16_t button = input_state_cb(player_index,
+ RETRO_DEVICE_ANALOG,
+ RETRO_DEVICE_INDEX_ANALOG_BUTTON,
+ id);
+ button = MIN(button / 128, 255);
+
+ if (button == 0)
+ {
+ // If we got exactly zero, we're either not pressing the button, or the front-end
+ // is not reporting analog values. We need to do a second check using the classic
+ // digital API method, to at least get some response - better than nothing.
+
+ // NOTE: If we're really just not holding the button, we're still going to get zero.
+
+ button = (ret & (1 << id)) ? 255 : 0;
+ }
+
+ return button;
+}
+
+unsigned char axis_range_modifier(int16_t axis_value, bool is_square)
+{
+ float modifier_axis_range = 0;
+
+ if (is_square)
+ {
+ modifier_axis_range = round((axis_value >> 8) / 0.785) + 128;
+ if (modifier_axis_range < 0)
+ {
+ modifier_axis_range = 0;
+ }
+ else if (modifier_axis_range > 255)
+ {
+ modifier_axis_range = 255;
+ }
+ }
+ else
+ {
+ modifier_axis_range = MIN(((axis_value >> 8) + 128), 255);
+ }
+
+ return modifier_axis_range;
+}
+
+static void update_input_guncon(int port, int ret)
+{
+ //ToDo:
+ //Core option for cursors for both players
+ //Separate pointer and lightgun control types
+
+ //Mouse range is -32767 -> 32767
+ //1% is about 655
+ //Use the left analog stick field to store the absolute coordinates
+ //Fix cursor to top-left when gun is detected as "offscreen"
+ if (input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_IS_OFFSCREEN) || input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_RELOAD))
+ {
+ in_analog_left[port][0] = -32767;
+ in_analog_left[port][1] = -32767;
+ }
+ else
+ {
+ int gunx = input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_SCREEN_X);
+ int guny = input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_SCREEN_Y);
+
+ in_analog_left[port][0] = (gunx * GunconAdjustRatioX) + (GunconAdjustX * 655);
+ in_analog_left[port][1] = (guny * GunconAdjustRatioY) + (GunconAdjustY * 655);
+ }
+
+ //GUNCON has 3 controls, Trigger,A,B which equal Circle,Start,Cross
+
+ // Trigger
+ if (input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_TRIGGER) || input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_RELOAD))
+ in_keystate[port] |= (1 << DKEY_CIRCLE);
+
+ // A
+ if (input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_AUX_A))
+ in_keystate[port] |= (1 << DKEY_START);
+
+ // B
+ if (input_state_cb(port, RETRO_DEVICE_LIGHTGUN, 0, RETRO_DEVICE_ID_LIGHTGUN_AUX_B))
+ in_keystate[port] |= (1 << DKEY_CROSS);
+
+}
+
+static void update_input_negcon(int port, int ret)
+{
+ int lsx;
+ int rsy;
+ int negcon_i_rs;
+ int negcon_ii_rs;
+ float negcon_twist_amplitude;
+
+ // Query digital inputs
+ //
+ // > Pad-Up
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_UP))
+ in_keystate[port] |= (1 << DKEY_UP);
+ // > Pad-Right
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_RIGHT))
+ in_keystate[port] |= (1 << DKEY_RIGHT);
+ // > Pad-Down
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_DOWN))
+ in_keystate[port] |= (1 << DKEY_DOWN);
+ // > Pad-Left
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_LEFT))
+ in_keystate[port] |= (1 << DKEY_LEFT);
+ // > Start
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_START))
+ in_keystate[port] |= (1 << DKEY_START);
+ // > neGcon A
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_A))
+ in_keystate[port] |= (1 << DKEY_CIRCLE);
+ // > neGcon B
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_X))
+ in_keystate[port] |= (1 << DKEY_TRIANGLE);
+ // > neGcon R shoulder (digital)
+ if (ret & (1 << RETRO_DEVICE_ID_JOYPAD_R))
+ in_keystate[port] |= (1 << DKEY_R1);
+ // Query analog inputs
+ //
+ // From studying 'libpcsxcore/plugins.c' and 'frontend/plugin.c':
+ // >> pad->leftJoyX == in_analog_left[port][0] == NeGcon II
+ // >> pad->leftJoyY == in_analog_left[port][1] == NeGcon L
+ // >> pad->rightJoyX == in_analog_right[port][0] == NeGcon twist
+ // >> pad->rightJoyY == in_analog_right[port][1] == NeGcon I
+ // So we just have to map in_analog_left/right to more
+ // appropriate inputs...
+ //
+ // > NeGcon twist
+ // >> Get raw analog stick value and account for deadzone
+ lsx = input_state_cb(port, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_X);
+ if (lsx > negcon_deadzone)
+ lsx = lsx - negcon_deadzone;
+ else if (lsx < -negcon_deadzone)
+ lsx = lsx + negcon_deadzone;
+ else
+ lsx = 0;
+ // >> Convert to an 'amplitude' [-1.0,1.0] and adjust response
+ negcon_twist_amplitude = (float)lsx / (float)(NEGCON_RANGE - negcon_deadzone);
+ if (negcon_linearity == 2)
+ {
+ if (negcon_twist_amplitude < 0.0)
+ negcon_twist_amplitude = -(negcon_twist_amplitude * negcon_twist_amplitude);
+ else
+ negcon_twist_amplitude = negcon_twist_amplitude * negcon_twist_amplitude;
+ }
+ else if (negcon_linearity == 3)
+ negcon_twist_amplitude = negcon_twist_amplitude * negcon_twist_amplitude * negcon_twist_amplitude;
+ // >> Convert to final 'in_analog' integer value [0,255]
+ in_analog_right[port][0] = MAX(MIN((int)(negcon_twist_amplitude * 128.0f) + 128, 255), 0);
+ // > NeGcon I + II
+ // >> Handle right analog stick vertical axis mapping...
+ // - Up (-Y) == accelerate == neGcon I
+ // - Down (+Y) == brake == neGcon II
+ negcon_i_rs = 0;
+ negcon_ii_rs = 0;
+ rsy = input_state_cb(port, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y);
+ if (rsy >= 0)
+ {
+ // Account for deadzone
+ // (Note: have never encountered a gamepad with significant differences
+ // in deadzone between left/right analog sticks, so use the regular 'twist'
+ // deadzone here)
+ if (rsy > negcon_deadzone)
+ rsy = rsy - negcon_deadzone;
+ else
+ rsy = 0;
+ // Convert to 'in_analog' integer value [0,255]
+ negcon_ii_rs = MIN((int)(((float)rsy / (float)(NEGCON_RANGE - negcon_deadzone)) * 255.0f), 255);
+ }
+ else
+ {
+ if (rsy < -negcon_deadzone)
+ rsy = -1 * (rsy + negcon_deadzone);
+ else
+ rsy = 0;
+ negcon_i_rs = MIN((int)(((float)rsy / (float)(NEGCON_RANGE - negcon_deadzone)) * 255.0f), 255);
+ }
+ // >> NeGcon I
+ in_analog_right[port][1] = MAX(
+ MAX(
+ get_analog_button(ret, input_state_cb, port, RETRO_DEVICE_ID_JOYPAD_R2),
+ get_analog_button(ret, input_state_cb, port, RETRO_DEVICE_ID_JOYPAD_B)),
+ negcon_i_rs);
+ // >> NeGcon II
+ in_analog_left[port][0] = MAX(
+ MAX(
+ get_analog_button(ret, input_state_cb, port, RETRO_DEVICE_ID_JOYPAD_L2),
+ get_analog_button(ret, input_state_cb, port, RETRO_DEVICE_ID_JOYPAD_Y)),
+ negcon_ii_rs);
+ // > NeGcon L
+ in_analog_left[port][1] = get_analog_button(ret, input_state_cb, port, RETRO_DEVICE_ID_JOYPAD_L);
+}
+
+static void update_input_mouse(int port, int ret)
+{
+ float raw_x = input_state_cb(port, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_X);
+ float raw_y = input_state_cb(port, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_Y);
+
+ int x = (int)roundf(raw_x * mouse_sensitivity);
+ int y = (int)roundf(raw_y * mouse_sensitivity);
+
+ if (x > 127) x = 127;
+ else if (x < -128) x = -128;
+
+ if (y > 127) y = 127;
+ else if (y < -128) y = -128;
+
+ in_mouse[port][0] = x; /* -128..+128 left/right movement, 0 = no movement */
+ in_mouse[port][1] = y; /* -128..+128 down/up movement, 0 = no movement */
+
+ /* left mouse button state */
+ if (input_state_cb(port, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_LEFT))
+ in_keystate[port] |= 1 << 11;
+
+ /* right mouse button state */
+ if (input_state_cb(port, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_RIGHT))
+ in_keystate[port] |= 1 << 10;
+}
+
+static void update_input(void)
+{
+ // reset all keystate, query libretro for keystate
+ int i;
+ int j;
+
+ for (i = 0; i < PORTS_NUMBER; i++)
+ {
+ int16_t ret = 0;
+ int type = in_type[i];
+
+ in_keystate[i] = 0;
+
+ if (type == PSE_PAD_TYPE_NONE)
+ continue;
+
+ if (libretro_supports_bitmasks)
+ ret = input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_MASK);
+ else
+ {
+ for (j = 0; j < (RETRO_DEVICE_ID_JOYPAD_R3 + 1); j++)
+ {
+ if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, j))
+ ret |= (1 << j);
+ }
+ }
+
+ switch (type)
+ {
+ case PSE_PAD_TYPE_GUNCON:
+ update_input_guncon(i, ret);
+ break;
+ case PSE_PAD_TYPE_NEGCON:
+ update_input_negcon(i, ret);
+ break;
+ case PSE_PAD_TYPE_MOUSE:
+ update_input_mouse(i, ret);
+ break;
+ default:
+ // Query digital inputs
+ for (j = 0; j < RETRO_PSX_MAP_LEN; j++)
+ if (ret & (1 << j))
+ in_keystate[i] |= retro_psx_map[j];
+
+ // Query analog inputs
+ if (type == PSE_PAD_TYPE_ANALOGJOY || type == PSE_PAD_TYPE_ANALOGPAD)
+ {
+ in_analog_left[i][0] = axis_range_modifier(input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_X), axis_bounds_modifier);
+ in_analog_left[i][1] = axis_range_modifier(input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_Y), axis_bounds_modifier);
+ in_analog_right[i][0] = axis_range_modifier(input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_X), axis_bounds_modifier);
+ in_analog_right[i][1] = axis_range_modifier(input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y), axis_bounds_modifier);
+ }
+ }
+ }
+}
+
+static void print_internal_fps(void)
+{
+ if (display_internal_fps)
+ {
+ frame_count++;
+
+ if (frame_count % INTERNAL_FPS_SAMPLE_PERIOD == 0)
+ {
+ unsigned internal_fps = pl_rearmed_cbs.flip_cnt * (is_pal_mode ? 50 : 60) / INTERNAL_FPS_SAMPLE_PERIOD;
+ char str[64];
+ const char *strc = (const char *)str;
+
+ str[0] = '\0';
+
+ snprintf(str, sizeof(str), "Internal FPS: %2d", internal_fps);
+
+ pl_rearmed_cbs.flip_cnt = 0;
+
+ if (msg_interface_version >= 1)
+ {
+ struct retro_message_ext msg = {
+ strc,
+ 3000,
+ 1,
+ RETRO_LOG_INFO,
+ RETRO_MESSAGE_TARGET_OSD,
+ RETRO_MESSAGE_TYPE_STATUS,
+ -1
+ };
+ environ_cb(RETRO_ENVIRONMENT_SET_MESSAGE_EXT, &msg);
+ }
+ else
+ {
+ struct retro_message msg = {
+ strc,
+ 180
+ };
+ environ_cb(RETRO_ENVIRONMENT_SET_MESSAGE, &msg);
+ }
+ }
+ }
+ else
+ frame_count = 0;
+}
+
+void retro_run(void)
+{
+ //SysReset must be run while core is running,Not in menu (Locks up Retroarch)
+ if (rebootemu != 0)
+ {
+ rebootemu = 0;
+ SysReset();
+ if (!Config.HLE && !Config.SlowBoot)
+ {
+ // skip BIOS logos
+ psxRegs.pc = psxRegs.GPR.n.ra;
+ }
+ return;
+ }
+
+ print_internal_fps();
+
+ /* Check whether current frame should
+ * be skipped */
+ pl_rearmed_cbs.fskip_force = 0;
+ pl_rearmed_cbs.fskip_dirty = 0;
+
+ if (frameskip_type != FRAMESKIP_NONE)
+ {
+ bool skip_frame = false;
+
+ switch (frameskip_type)
+ {
+ case FRAMESKIP_AUTO:
+ skip_frame = retro_audio_buff_active && retro_audio_buff_underrun;
+ break;
+ case FRAMESKIP_AUTO_THRESHOLD:
+ skip_frame = retro_audio_buff_active && (retro_audio_buff_occupancy < frameskip_threshold);
+ break;
+ case FRAMESKIP_FIXED_INTERVAL:
+ skip_frame = true;
+ break;
+ default:
+ break;
+ }
+
+ if (skip_frame && frameskip_counter < frameskip_interval)
+ pl_rearmed_cbs.fskip_force = 1;
+ }
+
+ /* If frameskip/timing settings have changed,
+ * update frontend audio latency
+ * > Can do this before or after the frameskip
+ * check, but doing it after means we at least
+ * retain the current frame's audio output */
+ if (update_audio_latency)
+ {
+ environ_cb(RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY,
+ &retro_audio_latency);
+ update_audio_latency = false;
+ }
+
+ input_poll_cb();
+
+ update_input();
+
+ bool updated = false;
+ if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
+ update_variables(true);
+
+ stop = 0;
+ psxCpu->Execute();
+
+ if (pl_rearmed_cbs.fskip_dirty == 1) {
+ if (frameskip_counter < frameskip_interval)
+ frameskip_counter++;
+ else if (frameskip_counter >= frameskip_interval || !pl_rearmed_cbs.fskip_force)
+ frameskip_counter = 0;
+ }
+
+ video_cb((vout_fb_dirty || !vout_can_dupe || !duping_enable) ? vout_buf_ptr : NULL,
+ vout_width, vout_height, vout_width * 2);
+ vout_fb_dirty = 0;
+
+ set_vout_fb();
+}
+
+static bool try_use_bios(const char *path)
+{
+ long size;
+ const char *name;
+ FILE *fp = fopen(path, "rb");
+ if (fp == NULL)
+ return false;
+
+ fseek(fp, 0, SEEK_END);
+ size = ftell(fp);
+ fclose(fp);
+
+ if (size != 512 * 1024)
+ return false;
+
+ name = strrchr(path, SLASH);
+ if (name++ == NULL)
+ name = path;
+ snprintf(Config.Bios, sizeof(Config.Bios), "%s", name);
+ return true;
+}
+
+#ifndef VITA
+#include <sys/types.h>
+#include <dirent.h>
+
+static bool find_any_bios(const char *dirpath, char *path, size_t path_size)
+{
+ DIR *dir;
+ struct dirent *ent;
+ bool ret = false;
+
+ dir = opendir(dirpath);
+ if (dir == NULL)
+ return false;
+
+ while ((ent = readdir(dir)))
+ {
+ if ((strncasecmp(ent->d_name, "scph", 4) != 0) && (strncasecmp(ent->d_name, "psx", 3) != 0))
+ continue;
+
+ snprintf(path, path_size, "%s%c%s", dirpath, SLASH, ent->d_name);
+ ret = try_use_bios(path);
+ if (ret)
+ break;
+ }
+ closedir(dir);
+ return ret;
+}