mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-29 03:00:24 +00:00
268 lines
6.9 KiB
C
268 lines
6.9 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "state_tracker.h"
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#include <stdlib.h>
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#include "../compat/strl.h"
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#include "../general.h"
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#include "../libretro.h"
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#ifdef HAVE_PYTHON
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#include "py_state/py_state.h"
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#endif
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struct state_tracker_internal
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{
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char id[64];
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bool is_input;
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const uint16_t *input_ptr;
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const uint8_t *ptr;
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#ifdef HAVE_PYTHON
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py_state_t *py;
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#endif
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uint32_t addr;
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uint16_t mask;
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uint16_t equal;
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enum state_tracker_type type;
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uint32_t prev[2];
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int frame_count;
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int frame_count_prev;
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uint32_t old_value;
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int transition_count;
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};
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struct state_tracker
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{
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struct state_tracker_internal *info;
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unsigned info_elem;
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uint16_t input_state[2];
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#ifdef HAVE_PYTHON
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py_state_t *py;
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#endif
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};
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state_tracker_t* state_tracker_init(const struct state_tracker_info *info)
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{
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state_tracker_t *tracker = (state_tracker_t*)calloc(1, sizeof(*tracker));
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if (!tracker)
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return NULL;
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#ifdef HAVE_PYTHON
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if (info->script)
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{
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tracker->py = py_state_new(info->script, info->script_is_file, info->script_class ? info->script_class : "GameAware");
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if (!tracker->py)
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{
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free(tracker);
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RARCH_ERR("Failed to init Python script.\n");
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return NULL;
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}
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}
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#endif
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tracker->info = (struct state_tracker_internal*)calloc(info->info_elem, sizeof(struct state_tracker_internal));
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tracker->info_elem = info->info_elem;
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for (unsigned i = 0; i < info->info_elem; i++)
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{
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strlcpy(tracker->info[i].id, info->info[i].id, sizeof(tracker->info[i].id));
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tracker->info[i].addr = info->info[i].addr;
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tracker->info[i].type = info->info[i].type;
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tracker->info[i].mask = (info->info[i].mask == 0) ? 0xffff : info->info[i].mask;
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tracker->info[i].equal = info->info[i].equal;
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#ifdef HAVE_PYTHON
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if (info->info[i].type == RARCH_STATE_PYTHON)
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{
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if (!tracker->py)
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{
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free(tracker->info);
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free(tracker);
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RARCH_ERR("Python semantic was requested, but Python tracker is not loaded.\n");
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return NULL;
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}
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tracker->info[i].py = tracker->py;
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}
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#endif
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// If we don't have a valid pointer.
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static const uint8_t empty = 0;
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switch (info->info[i].ram_type)
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{
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case RARCH_STATE_WRAM:
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tracker->info[i].ptr = info->wram ? info->wram : ∅
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break;
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case RARCH_STATE_INPUT_SLOT1:
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tracker->info[i].input_ptr = &tracker->input_state[0];
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tracker->info[i].is_input = true;
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break;
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case RARCH_STATE_INPUT_SLOT2:
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tracker->info[i].input_ptr = &tracker->input_state[1];
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tracker->info[i].is_input = true;
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break;
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default:
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tracker->info[i].ptr = ∅
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}
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}
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return tracker;
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}
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void state_tracker_free(state_tracker_t *tracker)
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{
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free(tracker->info);
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#ifdef HAVE_PYTHON
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py_state_free(tracker->py);
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#endif
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free(tracker);
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}
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static inline uint16_t fetch(const struct state_tracker_internal *info)
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{
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uint16_t val = 0;
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if (info->is_input)
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val = *info->input_ptr;
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else
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val = info->ptr[info->addr];
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val &= info->mask;
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if (info->equal && val != info->equal)
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val = 0;
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return val;
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}
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static void update_element(
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struct state_tracker_uniform *uniform,
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struct state_tracker_internal *info,
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unsigned frame_count)
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{
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uniform->id = info->id;
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switch (info->type)
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{
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case RARCH_STATE_CAPTURE:
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uniform->value = fetch(info);
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break;
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case RARCH_STATE_CAPTURE_PREV:
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if (info->prev[0] != fetch(info))
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{
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info->prev[1] = info->prev[0];
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info->prev[0] = fetch(info);
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}
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uniform->value = info->prev[1];
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break;
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case RARCH_STATE_TRANSITION:
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if (info->old_value != fetch(info))
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{
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info->old_value = fetch(info);
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info->frame_count = frame_count;
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}
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uniform->value = info->frame_count;
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break;
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case RARCH_STATE_TRANSITION_COUNT:
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if (info->old_value != fetch(info))
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{
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info->old_value = fetch(info);
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info->transition_count++;
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}
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uniform->value = info->transition_count;
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break;
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case RARCH_STATE_TRANSITION_PREV:
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if (info->old_value != fetch(info))
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{
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info->old_value = fetch(info);
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info->frame_count_prev = info->frame_count;
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info->frame_count = frame_count;
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}
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uniform->value = info->frame_count_prev;
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break;
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#ifdef HAVE_PYTHON
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case RARCH_STATE_PYTHON:
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uniform->value = py_state_get(info->py, info->id, frame_count);
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break;
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#endif
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default:
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break;
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}
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}
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// Updates 16-bit input in same format as SNES itself.
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static void update_input(state_tracker_t *tracker)
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{
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if (driver.input == NULL)
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return;
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static const unsigned buttons[] = {
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RETRO_DEVICE_ID_JOYPAD_R,
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RETRO_DEVICE_ID_JOYPAD_L,
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RETRO_DEVICE_ID_JOYPAD_X,
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RETRO_DEVICE_ID_JOYPAD_A,
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RETRO_DEVICE_ID_JOYPAD_RIGHT,
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RETRO_DEVICE_ID_JOYPAD_LEFT,
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RETRO_DEVICE_ID_JOYPAD_DOWN,
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RETRO_DEVICE_ID_JOYPAD_UP,
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RETRO_DEVICE_ID_JOYPAD_START,
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RETRO_DEVICE_ID_JOYPAD_SELECT,
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RETRO_DEVICE_ID_JOYPAD_Y,
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RETRO_DEVICE_ID_JOYPAD_B,
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};
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// Only bind for up to two players for now.
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static const struct retro_keybind *binds[2] = {
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g_settings.input.binds[0],
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g_settings.input.binds[1],
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};
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uint16_t state[2] = {0};
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for (unsigned i = 4; i < 16; i++)
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{
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state[0] |= (input_input_state_func(binds, 0, RETRO_DEVICE_JOYPAD, 0, buttons[i - 4]) ? 1 : 0) << i;
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state[1] |= (input_input_state_func(binds, 1, RETRO_DEVICE_JOYPAD, 0, buttons[i - 4]) ? 1 : 0) << i;
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}
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for (unsigned i = 0; i < 2; i++)
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tracker->input_state[i] = state[i];
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}
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unsigned state_get_uniform(state_tracker_t *tracker, struct state_tracker_uniform *uniforms, unsigned elem, unsigned frame_count)
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{
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unsigned elems = tracker->info_elem < elem ? tracker->info_elem : elem;
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update_input(tracker);
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for (unsigned i = 0; i < elems; i++)
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update_element(&uniforms[i], &tracker->info[i], frame_count);
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return elems;
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}
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