mirror of
https://github.com/libretro/RetroArch.git
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309 lines
11 KiB
C
309 lines
11 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2012 - 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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#ifndef __DRIVER__H
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#define __DRIVER__H
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#include <sys/types.h>
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#include "boolean.h"
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#include "libretro.h"
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#include <stdlib.h>
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#include <stdint.h>
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#include "msvc/msvc_compat.h"
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_COMMAND
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#include "command.h"
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#endif
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#define AUDIO_CHUNK_SIZE_BLOCKING 64
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#define AUDIO_CHUNK_SIZE_NONBLOCKING 2048 // So we don't get complete line-noise when fast-forwarding audio.
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#define AUDIO_MAX_RATIO 16
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// libretro has 16 buttons from 0-15 (libretro.h)
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// Analog binds use RETRO_DEVICE_ANALOG, but we follow the same scheme internally
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// in RetroArch for simplicity,
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// so they are mapped into [16, 23].
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#define RARCH_FIRST_ANALOG_BIND 16
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#define RARCH_FIRST_META_KEY RARCH_ANALOG_BIND_LIST_END
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enum // RetroArch specific bind IDs.
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{
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// Analogs (RETRO_DEVICE_ANALOG)
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RARCH_ANALOG_LEFT_X_PLUS = RARCH_FIRST_ANALOG_BIND,
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RARCH_ANALOG_LEFT_X_MINUS,
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RARCH_ANALOG_LEFT_Y_PLUS,
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RARCH_ANALOG_LEFT_Y_MINUS,
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RARCH_ANALOG_RIGHT_X_PLUS,
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RARCH_ANALOG_RIGHT_X_MINUS,
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RARCH_ANALOG_RIGHT_Y_PLUS,
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RARCH_ANALOG_RIGHT_Y_MINUS,
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RARCH_ANALOG_BIND_LIST_END,
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// Command binds.
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RARCH_FAST_FORWARD_KEY = RARCH_ANALOG_BIND_LIST_END,
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RARCH_FAST_FORWARD_HOLD_KEY,
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RARCH_LOAD_STATE_KEY,
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RARCH_SAVE_STATE_KEY,
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RARCH_FULLSCREEN_TOGGLE_KEY,
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RARCH_QUIT_KEY,
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RARCH_STATE_SLOT_PLUS,
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RARCH_STATE_SLOT_MINUS,
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RARCH_AUDIO_INPUT_RATE_PLUS,
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RARCH_AUDIO_INPUT_RATE_MINUS,
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RARCH_REWIND,
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RARCH_MOVIE_RECORD_TOGGLE,
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RARCH_PAUSE_TOGGLE,
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RARCH_FRAMEADVANCE,
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RARCH_RESET,
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RARCH_SHADER_NEXT,
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RARCH_SHADER_PREV,
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RARCH_CHEAT_INDEX_PLUS,
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RARCH_CHEAT_INDEX_MINUS,
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RARCH_CHEAT_TOGGLE,
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RARCH_SCREENSHOT,
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RARCH_DSP_CONFIG,
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RARCH_MUTE,
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RARCH_NETPLAY_FLIP,
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RARCH_SLOWMOTION,
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#ifdef RARCH_CONSOLE
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RARCH_CHEAT_INPUT,
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RARCH_SRAM_WRITE_PROTECT,
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#endif
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RARCH_BIND_LIST_END,
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RARCH_BIND_LIST_END_NULL
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};
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struct retro_keybind
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{
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bool valid;
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int id;
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enum retro_key key;
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// PC only uses lower 16-bits.
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// Full 64-bit can be used for port-specific purposes, like simplifying multiple binds, etc.
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uint64_t joykey;
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uint32_t joyaxis;
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};
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typedef struct video_info
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{
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unsigned width;
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unsigned height;
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bool fullscreen;
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bool vsync;
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bool force_aspect;
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bool smooth;
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unsigned input_scale; // Maximum input size: RARCH_SCALE_BASE * input_scale
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bool rgb32; // Use 32-bit RGBA rather than native XBGR1555.
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} video_info_t;
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typedef struct audio_driver
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{
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void *(*init)(const char *device, unsigned rate, unsigned latency);
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ssize_t (*write)(void *data, const void *buf, size_t size);
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bool (*stop)(void *data);
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bool (*start)(void *data);
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void (*set_nonblock_state)(void *data, bool toggle); // Should we care about blocking in audio thread? Fast forwarding.
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void (*free)(void *data);
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bool (*use_float)(void *data); // Defines if driver will take standard floating point samples, or int16_t samples.
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const char *ident;
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size_t (*write_avail)(void *data); // Optional
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size_t (*buffer_size)(void *data); // Optional
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} audio_driver_t;
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#define AXIS_NEG(x) (((uint32_t)(x) << 16) | UINT16_C(0xFFFF))
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#define AXIS_POS(x) ((uint32_t)(x) | UINT32_C(0xFFFF0000))
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#define AXIS_NONE UINT32_C(0xFFFFFFFF)
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#define AXIS_DIR_NONE UINT16_C(0xFFFF)
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#define AXIS_NEG_GET(x) (((uint32_t)(x) >> 16) & UINT16_C(0xFFFF))
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#define AXIS_POS_GET(x) ((uint32_t)(x) & UINT16_C(0xFFFF))
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#define NO_BTN UINT16_C(0xFFFF) // I hope no joypad will ever have this many buttons ... ;)
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#define HAT_UP_MASK (1 << 15)
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#define HAT_DOWN_MASK (1 << 14)
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#define HAT_LEFT_MASK (1 << 13)
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#define HAT_RIGHT_MASK (1 << 12)
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#define HAT_MAP(x, hat) ((x & ((1 << 12) - 1)) | hat)
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#define HAT_MASK (HAT_UP_MASK | HAT_DOWN_MASK | HAT_LEFT_MASK | HAT_RIGHT_MASK)
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#define GET_HAT_DIR(x) (x & HAT_MASK)
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#define GET_HAT(x) (x & (~HAT_MASK))
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typedef struct input_driver
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{
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void *(*init)(void);
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void (*poll)(void *data);
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int16_t (*input_state)(void *data, const struct retro_keybind **retro_keybinds, unsigned port, unsigned device, unsigned index, unsigned id);
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bool (*key_pressed)(void *data, int key);
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void (*free)(void *data);
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#ifdef RARCH_CONSOLE
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void (*set_default_keybind_lut)(unsigned device, unsigned port);
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void (*set_analog_dpad_mapping)(unsigned device, unsigned map_dpad_enum, unsigned controller_id);
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void (*post_init)(void);
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unsigned max_pads;
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#endif
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const char *ident;
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} input_driver_t;
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typedef struct video_driver
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{
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void *(*init)(const video_info_t *video, const input_driver_t **input, void **input_data);
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// Should the video driver act as an input driver as well? :) The video init might preinitialize an input driver to override the settings in case the video driver relies on input driver for event handling, e.g.
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bool (*frame)(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg); // msg is for showing a message on the screen along with the video frame.
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void (*set_nonblock_state)(void *data, bool toggle); // Should we care about syncing to vblank? Fast forwarding.
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// Is the window still active?
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bool (*alive)(void *data);
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bool (*focus)(void *data); // Does the window have focus?
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bool (*xml_shader)(void *data, const char *path); // Sets XML-shader. Might not be implemented.
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void (*free)(void *data);
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const char *ident;
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// Callbacks essentially useless on PC, but useful on consoles where the drivers are used for more stuff.
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#ifdef RARCH_CONSOLE
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void (*start)(void);
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void (*stop)(void);
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void (*restart)(void);
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#endif
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void (*set_rotation)(void *data, unsigned rotation);
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void (*viewport_size)(void *data, unsigned *width, unsigned *height);
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// Reads out in BGR byte order (24bpp).
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bool (*read_viewport)(void *data, uint8_t *buffer);
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} video_driver_t;
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typedef struct driver
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{
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const audio_driver_t *audio;
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const video_driver_t *video;
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const input_driver_t *input;
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void *audio_data;
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void *video_data;
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void *input_data;
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#ifdef HAVE_COMMAND
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rarch_cmd_t *command;
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#endif
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bool stdin_claimed;
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} driver_t;
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void init_drivers(void);
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void init_drivers_pre(void);
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void uninit_drivers(void);
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void init_video_input(void);
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void uninit_video_input(void);
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void init_audio(void);
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void uninit_audio(void);
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extern driver_t driver;
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//////////////////////////////////////////////// Backends
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extern const audio_driver_t audio_rsound;
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extern const audio_driver_t audio_oss;
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extern const audio_driver_t audio_alsa;
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extern const audio_driver_t audio_roar;
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extern const audio_driver_t audio_openal;
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extern const audio_driver_t audio_jack;
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extern const audio_driver_t audio_sdl;
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extern const audio_driver_t audio_xa;
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extern const audio_driver_t audio_pulse;
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extern const audio_driver_t audio_ext;
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extern const audio_driver_t audio_dsound;
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extern const audio_driver_t audio_coreaudio;
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extern const audio_driver_t audio_xenon360;
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extern const audio_driver_t audio_xdk360;
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extern const audio_driver_t audio_ps3;
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extern const audio_driver_t audio_gx;
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extern const audio_driver_t audio_null;
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extern const video_driver_t video_gl;
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extern const video_driver_t video_gx;
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extern const video_driver_t video_xenon360;
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extern const video_driver_t video_xvideo;
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extern const video_driver_t video_xdk_d3d;
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extern const video_driver_t video_sdl;
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extern const video_driver_t video_rpi;
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extern const video_driver_t video_ext;
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extern const video_driver_t video_null;
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extern const input_driver_t input_sdl;
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extern const input_driver_t input_x;
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extern const input_driver_t input_ps3;
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extern const input_driver_t input_xenon360;
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extern const input_driver_t input_gx;
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extern const input_driver_t input_xinput;
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extern const input_driver_t input_linuxraw;
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extern const input_driver_t input_null;
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////////////////////////////////////////////////
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// Convenience macros.
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#ifdef HAVE_GRIFFIN
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#include "console/griffin/hook.h"
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#else
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#define audio_init_func(device, rate, latency) driver.audio->init(device, rate, latency)
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#define audio_write_func(buf, size) driver.audio->write(driver.audio_data, buf, size)
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#define audio_stop_func() driver.audio->stop(driver.audio_data)
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#define audio_start_func() driver.audio->start(driver.audio_data)
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#define audio_set_nonblock_state_func(state) driver.audio->set_nonblock_state(driver.audio_data, state)
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#define audio_free_func() driver.audio->free(driver.audio_data)
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#define audio_use_float_func() driver.audio->use_float(driver.audio_data)
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#define audio_write_avail_func() driver.audio->write_avail(driver.audio_data)
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#define audio_buffer_size_func() driver.audio->buffer_size(driver.audio_data)
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#define video_init_func(video_info, input, input_data) \
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driver.video->init(video_info, input, input_data)
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#define video_frame_func(data, width, height, pitch, msg) \
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driver.video->frame(driver.video_data, data, width, height, pitch, msg)
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#define video_set_nonblock_state_func(state) driver.video->set_nonblock_state(driver.video_data, state)
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#define video_alive_func() driver.video->alive(driver.video_data)
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#define video_focus_func() driver.video->focus(driver.video_data)
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#define video_xml_shader_func(path) driver.video->xml_shader(driver.video_data, path)
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#define video_set_rotation_func(rotate) driver.video->set_rotation(driver.video_data, rotate)
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#define video_set_aspect_ratio_func(aspect_idx) driver.video->set_aspect_ratio(driver.video_data, aspect_idx)
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#define video_viewport_size_func(width, height) driver.video->viewport_size(driver.video_data, width, height)
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#define video_read_viewport_func(buffer) driver.video->read_viewport(driver.video_data, buffer)
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#define video_free_func() driver.video->free(driver.video_data)
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#define input_init_func() driver.input->init()
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#define input_poll_func() driver.input->poll(driver.input_data)
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#define input_input_state_func(retro_keybinds, port, device, index, id) \
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driver.input->input_state(driver.input_data, retro_keybinds, port, device, index, id)
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#define input_free_func() driver.input->free(driver.input_data)
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static inline bool input_key_pressed_func(int key)
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{
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bool ret = driver.input->key_pressed(driver.input_data, key);
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#ifdef HAVE_COMMAND
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if (!ret && driver.command)
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ret = rarch_cmd_get(driver.command, key);
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#endif
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return ret;
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}
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#endif
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#endif
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