X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=frontend%2Flibretro.h;fp=frontend%2Flibretro.h;h=8aa579e863ed2bb78867739ecc5dd7e9206530b4;hb=38c2028e228dcf17f3b4b0ac7e6984d1e1c6df79;hp=0000000000000000000000000000000000000000;hpb=96751f36c7867567d4d8c612c78f235392d1f243;p=pcsx_rearmed.git diff --git a/frontend/libretro.h b/frontend/libretro.h new file mode 100644 index 00000000..8aa579e8 --- /dev/null +++ b/frontend/libretro.h @@ -0,0 +1,333 @@ +#ifndef LIBRETRO_H__ +#define LIBRETRO_H__ + +#include +#include + +#ifdef __cplusplus +extern "C" { +#else +#if defined(_MSC_VER) && !defined(__cplusplus) +#define bool unsigned char +#define true 1 +#define false 0 +#else +#include +#endif +#endif + +#define RETRO_API_VERSION 1 + +#define RETRO_DEVICE_MASK 0xff +#define RETRO_DEVICE_NONE 0 +#define RETRO_DEVICE_JOYPAD 1 +#define RETRO_DEVICE_MOUSE 2 +#define RETRO_DEVICE_KEYBOARD 3 +#define RETRO_DEVICE_LIGHTGUN 4 +#define RETRO_DEVICE_ANALOG 5 + +#define RETRO_DEVICE_JOYPAD_MULTITAP ((1 << 8) | RETRO_DEVICE_JOYPAD) +#define RETRO_DEVICE_LIGHTGUN_SUPER_SCOPE ((1 << 8) | RETRO_DEVICE_LIGHTGUN) +#define RETRO_DEVICE_LIGHTGUN_JUSTIFIER ((2 << 8) | RETRO_DEVICE_LIGHTGUN) +#define RETRO_DEVICE_LIGHTGUN_JUSTIFIERS ((3 << 8) | RETRO_DEVICE_LIGHTGUN) + +#define RETRO_DEVICE_ID_JOYPAD_B 0 +#define RETRO_DEVICE_ID_JOYPAD_Y 1 +#define RETRO_DEVICE_ID_JOYPAD_SELECT 2 +#define RETRO_DEVICE_ID_JOYPAD_START 3 +#define RETRO_DEVICE_ID_JOYPAD_UP 4 +#define RETRO_DEVICE_ID_JOYPAD_DOWN 5 +#define RETRO_DEVICE_ID_JOYPAD_LEFT 6 +#define RETRO_DEVICE_ID_JOYPAD_RIGHT 7 +#define RETRO_DEVICE_ID_JOYPAD_A 8 +#define RETRO_DEVICE_ID_JOYPAD_X 9 +#define RETRO_DEVICE_ID_JOYPAD_L 10 +#define RETRO_DEVICE_ID_JOYPAD_R 11 +#define RETRO_DEVICE_ID_JOYPAD_L2 12 +#define RETRO_DEVICE_ID_JOYPAD_R2 13 +#define RETRO_DEVICE_ID_JOYPAD_L3 14 +#define RETRO_DEVICE_ID_JOYPAD_R3 15 + +#define RETRO_DEVICE_INDEX_ANALOG_LEFT 0 +#define RETRO_DEVICE_INDEX_ANALOG_RIGHT 1 +#define RETRO_DEVICE_ID_ANALOG_X 0 +#define RETRO_DEVICE_ID_ANALOG_Y 1 + +#define RETRO_DEVICE_ID_MOUSE_X 0 +#define RETRO_DEVICE_ID_MOUSE_Y 1 +#define RETRO_DEVICE_ID_MOUSE_LEFT 2 +#define RETRO_DEVICE_ID_MOUSE_RIGHT 3 + +#define RETRO_DEVICE_ID_LIGHTGUN_X 0 +#define RETRO_DEVICE_ID_LIGHTGUN_Y 1 +#define RETRO_DEVICE_ID_LIGHTGUN_TRIGGER 2 +#define RETRO_DEVICE_ID_LIGHTGUN_CURSOR 3 +#define RETRO_DEVICE_ID_LIGHTGUN_TURBO 4 +#define RETRO_DEVICE_ID_LIGHTGUN_PAUSE 5 +#define RETRO_DEVICE_ID_LIGHTGUN_START 6 + +#define RETRO_REGION_NTSC 0 +#define RETRO_REGION_PAL 1 + +#define RETRO_MEMORY_MASK 0xff +#define RETRO_MEMORY_SAVE_RAM 0 +#define RETRO_MEMORY_RTC 1 +#define RETRO_MEMORY_SYSTEM_RAM 2 +#define RETRO_MEMORY_VIDEO_RAM 3 + +#define RETRO_MEMORY_SNES_BSX_RAM ((1 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_BSX_PRAM ((2 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_SUFAMI_TURBO_A_RAM ((3 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_SUFAMI_TURBO_B_RAM ((4 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_GAME_BOY_RAM ((5 << 8) | RETRO_MEMORY_SAVE_RAM) +#define RETRO_MEMORY_SNES_GAME_BOY_RTC ((6 << 8) | RETRO_MEMORY_RTC) + +#define RETRO_GAME_TYPE_BSX 0x101 +#define RETRO_GAME_TYPE_BSX_SLOTTED 0x102 +#define RETRO_GAME_TYPE_SUFAMI_TURBO 0x103 +#define RETRO_GAME_TYPE_SUPER_GAME_BOY 0x104 + + +// Environment commands. +#define RETRO_ENVIRONMENT_SET_ROTATION 1 // const unsigned * -- + // Sets screen rotation of graphics. + // Is only implemented if rotation can be accelerated by hardware. + // Valid values are 0, 1, 2, 3, which rotates screen by 0, 90, 180, 270 degrees + // counter-clockwise respectively. + // +#define RETRO_ENVIRONMENT_GET_OVERSCAN 2 // bool * -- + // Boolean value whether or not the implementation should use overscan, or crop away overscan. + // +#define RETRO_ENVIRONMENT_GET_CAN_DUPE 3 // bool * -- + // Boolean value whether or not RetroArch supports frame duping, + // passing NULL to video frame callback. + // +#define RETRO_ENVIRONMENT_GET_VARIABLE 4 // struct retro_variable * -- + // Interface to aquire user-defined information from environment + // that cannot feasibly be supported in a multi-system way. + // Mostly used for obscure, + // specific features that the user can tap into when neseccary. + // +#define RETRO_ENVIRONMENT_SET_VARIABLES 5 // const struct retro_variable * -- + // Allows an implementation to signal the environment + // which variables it might want to check for later using GET_VARIABLE. + // 'data' points to an array of retro_variable structs terminated by a { NULL, NULL } element. + // retro_variable::value should contain a human readable description of the key. + // +#define RETRO_ENVIRONMENT_SET_MESSAGE 6 // const struct retro_message * -- + // Sets a message to be displayed in implementation-specific manner for a certain amount of 'frames'. + // Should not be used for trivial messages, which should simply be logged to stderr. +#define RETRO_ENVIRONMENT_SHUTDOWN 7 // N/A (NULL) -- + // Requests the frontend to shutdown. + // Should only be used if game has a specific + // way to shutdown the game from a menu item or similar. + // +#define RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL 8 + // const unsigned * -- + // Gives a hint to the frontend how demanding this implementation + // is on a system. E.g. reporting a level of 2 means + // this implementation should run decently on all frontends + // of level 2 and up. + // + // It can be used by the frontend to potentially warn + // about too demanding implementations. + // + // The levels are "floating", but roughly defined as: + // 1: Low-powered devices such as Raspberry Pi, smart phones, tablets, etc. + // 2: Medium-spec consoles, such as PS3/360, with sub-par CPUs. + // 3: Modern desktop/laptops with reasonably powerful CPUs. + // 4: High-end desktops with very powerful CPUs. + // + // This function can be called on a per-game basis, + // as certain games an implementation can play might be + // particularily demanding. + // If called, it should be called in retro_load_game(). + // +#define RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY 9 + // const char ** -- + // Returns the "system" directory of the frontend. + // This directory can be used to store system specific ROMs such as BIOSes, configuration data, etc. + // The returned value can be NULL. + // If so, no such directory is defined, + // and it's up to the implementation to find a suitable directory. + // +#define RETRO_ENVIRONMENT_SET_PIXEL_FORMAT 10 + // const enum retro_pixel_format * -- + // Sets the internal pixel format used by the implementation. + // The default pixel format is RETRO_PIXEL_FORMAT_XRGB1555. + // If the call returns false, the frontend does not support this pixel format. + // This function should be called inside retro_load_game() or retro_get_system_av_info(). + +enum retro_pixel_format +{ + RETRO_PIXEL_FORMAT_0RGB1555 = 0, // 0RGB1555, native endian. 0 bit must be set to 0. + RETRO_PIXEL_FORMAT_XRGB8888 // XRGB8888, native endian. X bits are ignored. +}; + +struct retro_message +{ + const char *msg; // Message to be displayed. + unsigned frames; // Duration in frames of message. +}; + +struct retro_system_info +{ + const char *library_name; // Descriptive name of library. Should not contain any version numbers, etc. + const char *library_version; // Descriptive version of core. + + const char *valid_extensions; // A string listing probably rom extensions the core will be able to load, separated with pipe. + // I.e. "bin|rom|iso". + // Typically used for a GUI to filter out extensions. + + bool need_fullpath; // If true, retro_load_game() is guaranteed to provide a valid pathname in retro_game_info::path. + // ::data and ::size are both invalid. + // If false, ::data and ::size are guaranteed to be valid, but ::path might not be valid. + // This is typically set to true for libretro implementations that must load from file. + // Implementations should strive for setting this to false, as it allows the frontend to perform patching, etc. + + bool block_extract; // If true, the frontend is not allowed to extract any archives before loading the real ROM. + // Necessary for certain libretro implementations that load games from zipped archives. +}; + +struct retro_game_geometry +{ + unsigned base_width; // Nominal video width of game. + unsigned base_height; // Nominal video height of game. + unsigned max_width; // Maximum possible width of game. + unsigned max_height; // Maximum possible height of game. + + float aspect_ratio; // Nominal aspect ratio of game. If aspect_ratio is <= 0.0, + // an aspect ratio of base_width / base_height is assumed. + // A frontend could override this setting if desired. +}; + +struct retro_system_timing +{ + double fps; // FPS of video content. + double sample_rate; // Sampling rate of audio. +}; + +struct retro_system_av_info +{ + struct retro_game_geometry geometry; + struct retro_system_timing timing; +}; + +struct retro_variable +{ + const char *key; // Variable to query in RETRO_ENVIRONMENT_GET_VARIABLE. + // If NULL, obtains the complete environment string if more complex parsing is necessary. + // The environment string is formatted as key-value pairs delimited by semicolons as so: + // "key1=value1;key2=value2;..." + const char *value; // Value to be obtained. If key does not exist, it is set to NULL. +}; + +struct retro_game_info +{ + const char *path; // Path to game, UTF-8 encoded. Usually used as a reference. + // May be NULL if rom was loaded from stdin or similar. + // retro_system_info::need_fullpath guaranteed that this path is valid. + const void *data; // Memory buffer of loaded game. Will be NULL if need_fullpath was set. + size_t size; // Size of memory buffer. + const char *meta; // String of implementation specific meta-data. +}; + +// Callbacks +// +// Environment callback. Gives implementations a way of performing uncommon tasks. Extensible. +typedef bool (*retro_environment_t)(unsigned cmd, void *data); + +// Render a frame. Pixel format is 15-bit 0RGB1555 native endian unless changed (see RETRO_ENVIRONMENT_SET_PIXEL_FORMAT). +// Width and height specify dimensions of buffer. +// Pitch specifices length in bytes between two lines in buffer. +typedef void (*retro_video_refresh_t)(const void *data, unsigned width, unsigned height, size_t pitch); + +// Renders a single audio frame. Should only be used if implementation generates a single sample at a time. +// Format is signed 16-bit native endian. +typedef void (*retro_audio_sample_t)(int16_t left, int16_t right); +// Renders multiple audio frames in one go. One frame is defined as a sample of left and right channels, interleaved. +// I.e. int16_t buf[4] = { l, r, l, r }; would be 2 frames. +// Only one of the audio callbacks must ever be used. +typedef size_t (*retro_audio_sample_batch_t)(const int16_t *data, size_t frames); + +// Polls input. +typedef void (*retro_input_poll_t)(void); +// Queries for input for player 'port'. device will be masked with RETRO_DEVICE_MASK. +// Specialization of devices such as RETRO_DEVICE_JOYPAD_MULTITAP that have been set with retro_set_controller_port_device() +// will still use the higher level RETRO_DEVICE_JOYPAD to request input. +typedef int16_t (*retro_input_state_t)(unsigned port, unsigned device, unsigned index, unsigned id); + +// Sets callbacks. retro_set_environment() is guaranteed to be called before retro_init(). +// The rest of the set_* functions are guaranteed to have been called before the first call to retro_run() is made. +void retro_set_environment(retro_environment_t); +void retro_set_video_refresh(retro_video_refresh_t); +void retro_set_audio_sample(retro_audio_sample_t); +void retro_set_audio_sample_batch(retro_audio_sample_batch_t); +void retro_set_input_poll(retro_input_poll_t); +void retro_set_input_state(retro_input_state_t); + +// Library global initialization/deinitialization. +void retro_init(void); +void retro_deinit(void); + +// Must return RETRO_API_VERSION. Used to validate ABI compatibility when the API is revised. +unsigned retro_api_version(void); + +// Gets statically known system info. Pointers provided in *info must be statically allocated. +// Can be called at any time, even before retro_init(). +void retro_get_system_info(struct retro_system_info *info); + +// Gets information about system audio/video timings and geometry. +// Can be called only after retro_load_game() has successfully completed. +void retro_get_system_av_info(struct retro_system_av_info *info); + +// Sets device to be used for player 'port'. +void retro_set_controller_port_device(unsigned port, unsigned device); + +// Resets the current game. +void retro_reset(void); + +// Runs the game for one video frame. +// During retro_run(), input_poll callback must be called at least once. +// +// If a frame is not rendered for reasons where a game "dropped" a frame, +// this still counts as a frame, and retro_run() should explicitly dupe a frame if GET_CAN_DUPE returns true. +// In this case, the video callback can take a NULL argument for data. +void retro_run(void); + +// Returns the amount of data the implementation requires to serialize internal state (save states). +// Beetween calls to retro_load_game() and retro_unload_game(), the returned size is never allowed to be larger than a previous returned value, to +// ensure that the frontend can allocate a save state buffer once. +size_t retro_serialize_size(void); + +// Serializes internal state. If failed, or size is lower than retro_serialize_size(), it should return false, true otherwise. +bool retro_serialize(void *data, size_t size); +bool retro_unserialize(const void *data, size_t size); + +void retro_cheat_reset(void); +void retro_cheat_set(unsigned index, bool enabled, const char *code); + +// Loads a game. +bool retro_load_game(const struct retro_game_info *game); + +// Loads a "special" kind of game. Should not be used except in extreme cases. +bool retro_load_game_special( + unsigned game_type, + const struct retro_game_info *info, size_t num_info +); + +// Unloads a currently loaded game. +void retro_unload_game(void); + +// Gets region of game. +unsigned retro_get_region(void); + +// Gets region of memory. +void *retro_get_memory_data(unsigned id); +size_t retro_get_memory_size(unsigned id); + +#ifdef __cplusplus +} +#endif + +#endif