RetroArch/driver.h

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/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
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*
* Some code herein may be based on code found in BSNES.
*
* SSNES is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with SSNES.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DRIVER__H
#define __DRIVER__H
#include <sys/types.h>
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#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
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#include <unistd.h>
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enum
{
SSNES_FAST_FORWARD_KEY = 0x666, // Hurr, durr
SSNES_FAST_FORWARD_HOLD_KEY,
SSNES_LOAD_STATE_KEY,
SSNES_SAVE_STATE_KEY,
SSNES_FULLSCREEN_TOGGLE_KEY,
SSNES_QUIT_KEY,
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SSNES_STATE_SLOT_PLUS,
SSNES_STATE_SLOT_MINUS,
SSNES_AUDIO_INPUT_RATE_PLUS,
SSNES_AUDIO_INPUT_RATE_MINUS,
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SSNES_REWIND,
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SSNES_MOVIE_RECORD_TOGGLE,
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SSNES_PAUSE_TOGGLE,
SSNES_RESET,
SSNES_SHADER_NEXT,
SSNES_SHADER_PREV,
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SSNES_CHEAT_INDEX_PLUS,
SSNES_CHEAT_INDEX_MINUS,
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SSNES_CHEAT_TOGGLE,
SSNES_SCREENSHOT,
SSNES_DSP_CONFIG
};
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struct snes_keybind
{
int id;
uint16_t key;
uint16_t joykey;
uint32_t joyaxis;
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};
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typedef struct video_info
{
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unsigned width;
unsigned height;
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bool fullscreen;
bool vsync;
bool force_aspect;
bool smooth;
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int input_scale; // HQ2X => 2, HQ4X => 4, None => 1
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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void* (*init)(const char* device, unsigned rate, unsigned latency);
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ssize_t (*write)(void* data, const void* buf, size_t size);
bool (*stop)(void* data);
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);
bool (*use_float)(void *data); // Defines if driver will take standard floating point samples, or int16_t samples.
const char *ident;
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} audio_driver_t;
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#define AXIS_NEG(x) (((uint32_t)(x) << 16) | 0xFFFFU)
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#define AXIS_POS(x) ((uint32_t)(x) | 0xFFFF0000U)
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#define AXIS_NONE (0xFFFFFFFFU)
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#define AXIS_NEG_GET(x) (((uint32_t)(x) >> 16) & 0xFFFFU)
#define AXIS_POS_GET(x) ((uint32_t)(x) & 0xFFFFU)
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#define NO_BTN ((uint16_t)0xFFFFU) // I hope no joypad will ever have this many buttons ... ;)
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#define HAT_UP_MASK (1 << 15)
#define HAT_DOWN_MASK (1 << 14)
#define HAT_LEFT_MASK (1 << 13)
#define HAT_RIGHT_MASK (1 << 12)
#define HAT_MAP(x, hat) ((x & ((1 << 12) - 1)) | hat)
#define HAT_MASK (HAT_UP_MASK | HAT_DOWN_MASK | HAT_LEFT_MASK | HAT_RIGHT_MASK)
#define GET_HAT_DIR(x) (x & HAT_MASK)
#define GET_HAT(x) (x & (~HAT_MASK))
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typedef struct input_driver
{
void* (*init)(void);
void (*poll)(void* data);
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int16_t (*input_state)(void* data, const struct snes_keybind **snes_keybinds, bool port, unsigned device, unsigned index, unsigned id);
bool (*key_pressed)(void* data, int key);
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void (*free)(void* data);
const char *ident;
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} input_driver_t;
typedef struct video_driver
{
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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.
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?
bool (*alive)(void *data);
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bool (*focus)(void *data); // Does the window have focus?
bool (*xml_shader)(void *data, const char *path); // Sets XML-shader. Might not be implemented.
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void (*free)(void* data);
const char *ident;
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} video_driver_t;
typedef struct driver
{
const audio_driver_t *audio;
const video_driver_t *video;
const input_driver_t *input;
void *audio_data;
void *video_data;
void *input_data;
} driver_t;
void init_drivers(void);
void uninit_drivers(void);
void init_video_input(void);
void uninit_video_input(void);
void init_audio(void);
void uninit_audio(void);
extern driver_t driver;
//////////////////////////////////////////////// Backends
extern const audio_driver_t audio_rsound;
extern const audio_driver_t audio_oss;
extern const audio_driver_t audio_alsa;
extern const audio_driver_t audio_roar;
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;
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;
extern const audio_driver_t audio_dsound;
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extern const audio_driver_t audio_coreaudio;
extern const video_driver_t video_gl;
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extern const video_driver_t video_xvideo;
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extern const video_driver_t video_sdl;
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extern const video_driver_t video_ext;
extern const input_driver_t input_sdl;
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extern const input_driver_t input_x;
////////////////////////////////////////////////
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#endif