mirror of
https://github.com/libretro/RetroArch.git
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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2017 - Daniel De Matteis
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* Copyright (C) 2014-2017 - Alfred Agrell
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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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#ifndef __STATE_MANAGER_H
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#define __STATE_MANAGER_H
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#include <stdint.h>
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#include <stddef.h>
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#include <boolean.h>
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#include <retro_common_api.h>
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#include "dynamic.h"
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RETRO_BEGIN_DECLS
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struct state_manager
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{
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uint8_t *data;
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/* Reading and writing is done here here. */
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uint8_t *head;
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/* If head comes close to this, discard a frame. */
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uint8_t *tail;
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uint8_t *thisblock;
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uint8_t *nextblock;
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#if STRICT_BUF_SIZE
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uint8_t *debugblock;
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size_t debugsize;
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#endif
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size_t capacity;
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/* This one is rounded up from reset::blocksize. */
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size_t blocksize;
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/* size_t + (blocksize + 131071) / 131072 *
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* (blocksize + u16 + u16) + u16 + u32 + size_t
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* (yes, the math is a bit ugly). */
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size_t maxcompsize;
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unsigned entries;
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bool thisblock_valid;
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};
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typedef struct state_manager state_manager_t;
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enum state_manager_rewind_st_flags
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{
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STATE_MGR_REWIND_ST_FLAG_FRAME_IS_REVERSED = (1 << 0),
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STATE_MGR_REWIND_ST_FLAG_INIT_ATTEMPTED = (1 << 1),
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STATE_MGR_REWIND_ST_FLAG_HOTKEY_WAS_CHECKED = (1 << 2),
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STATE_MGR_REWIND_ST_FLAG_HOTKEY_WAS_PRESSED = (1 << 3)
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};
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struct state_manager_rewind_state
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{
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/* Rewind support. */
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state_manager_t *state;
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size_t size;
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uint8_t flags;
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};
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bool state_manager_frame_is_reversed(void);
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void state_manager_event_deinit(
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struct state_manager_rewind_state *rewind_st,
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struct retro_core_t *current_core);
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void state_manager_event_init(struct state_manager_rewind_state *rewind_st,
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unsigned rewind_buffer_size);
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/**
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* check_rewind:
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* @pressed : was rewind key pressed or held?
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*
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* Checks if rewind toggle/hold was being pressed and/or held.
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**/
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bool state_manager_check_rewind(
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struct state_manager_rewind_state *rewind_st,
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struct retro_core_t *current_core,
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bool pressed,
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unsigned rewind_granularity, bool is_paused,
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char *s, size_t len, unsigned *time);
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RETRO_END_DECLS
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#endif
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