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Diffstat (limited to 'Source/external/SDL2/src/joystick/psp/SDL_sysjoystick.c')
| -rw-r--r-- | Source/external/SDL2/src/joystick/psp/SDL_sysjoystick.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/joystick/psp/SDL_sysjoystick.c b/Source/external/SDL2/src/joystick/psp/SDL_sysjoystick.c new file mode 100644 index 0000000..262da85 --- /dev/null +++ b/Source/external/SDL2/src/joystick/psp/SDL_sysjoystick.c @@ -0,0 +1,264 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "../../SDL_internal.h" + +#if SDL_JOYSTICK_PSP + +/* This is the PSP implementation of the SDL joystick API */ +#include <pspctrl.h> +#include <pspkernel.h> + +#include <stdio.h> /* For the definition of NULL */ +#include <stdlib.h> + +#include "../SDL_sysjoystick.h" +#include "../SDL_joystick_c.h" + +#include "SDL_events.h" +#include "SDL_error.h" +#include "SDL_mutex.h" +#include "SDL_timer.h" +#include "../../thread/SDL_systhread.h" + +/* Current pad state */ +static SceCtrlData pad = { .Lx = 0, .Ly = 0, .Buttons = 0 }; +static SDL_sem *pad_sem = NULL; +static SDL_Thread *thread = NULL; +static int running = 0; +static const enum PspCtrlButtons button_map[] = { + PSP_CTRL_TRIANGLE, PSP_CTRL_CIRCLE, PSP_CTRL_CROSS, PSP_CTRL_SQUARE, + PSP_CTRL_LTRIGGER, PSP_CTRL_RTRIGGER, + PSP_CTRL_DOWN, PSP_CTRL_LEFT, PSP_CTRL_UP, PSP_CTRL_RIGHT, + PSP_CTRL_SELECT, PSP_CTRL_START, PSP_CTRL_HOME, PSP_CTRL_HOLD }; +static int analog_map[256]; /* Map analog inputs to -32768 -> 32767 */ + +typedef struct +{ + int x; + int y; +} point; + +/* 4 points define the bezier-curve. */ +static point a = { 0, 0 }; +static point b = { 50, 0 }; +static point c = { 78, 32767 }; +static point d = { 128, 32767 }; + +/* simple linear interpolation between two points */ +static SDL_INLINE void lerp (point *dest, point *a, point *b, float t) +{ + dest->x = a->x + (b->x - a->x)*t; + dest->y = a->y + (b->y - a->y)*t; +} + +/* evaluate a point on a bezier-curve. t goes from 0 to 1.0 */ +static int calc_bezier_y(float t) +{ + point ab, bc, cd, abbc, bccd, dest; + lerp (&ab, &a, &b, t); /* point between a and b */ + lerp (&bc, &b, &c, t); /* point between b and c */ + lerp (&cd, &c, &d, t); /* point between c and d */ + lerp (&abbc, &ab, &bc, t); /* point between ab and bc */ + lerp (&bccd, &bc, &cd, t); /* point between bc and cd */ + lerp (&dest, &abbc, &bccd, t); /* point on the bezier-curve */ + return dest.y; +} + +/* + * Collect pad data about once per frame + */ +int JoystickUpdate(void *data) +{ + while (running) { + SDL_SemWait(pad_sem); + sceCtrlPeekBufferPositive(&pad, 1); + SDL_SemPost(pad_sem); + /* Delay 1/60th of a second */ + sceKernelDelayThread(1000000 / 60); + } + return 0; +} + + + +/* Function to scan the system for joysticks. + * Joystick 0 should be the system default joystick. + * It should return number of joysticks, or -1 on an unrecoverable fatal error. + */ +int SDL_SYS_JoystickInit(void) +{ + int i; + + /* Setup input */ + sceCtrlSetSamplingCycle(0); + sceCtrlSetSamplingMode(PSP_CTRL_MODE_ANALOG); + + /* Start thread to read data */ + if((pad_sem = SDL_CreateSemaphore(1)) == NULL) { + return SDL_SetError("Can't create input semaphore"); + } + running = 1; + if((thread = SDL_CreateThreadInternal(JoystickUpdate, "JoystickThread", 4096, NULL)) == NULL) { + return SDL_SetError("Can't create input thread"); + } + + /* Create an accurate map from analog inputs (0 to 255) + to SDL joystick positions (-32768 to 32767) */ + for (i = 0; i < 128; i++) + { + float t = (float)i/127.0f; + analog_map[i+128] = calc_bezier_y(t); + analog_map[127-i] = -1 * analog_map[i+128]; + } + + return 1; +} + +int SDL_SYS_NumJoysticks(void) +{ + return 1; +} + +void SDL_SYS_JoystickDetect(void) +{ +} + +/* Function to get the device-dependent name of a joystick */ +const char * SDL_SYS_JoystickNameForDeviceIndex(int device_index) +{ + return "PSP builtin joypad"; +} + +/* Function to perform the mapping from device index to the instance id for this index */ +SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index) +{ + return device_index; +} + +/* Function to get the device-dependent name of a joystick */ +const char *SDL_SYS_JoystickName(int index) +{ + if (index == 0) + return "PSP controller"; + + SDL_SetError("No joystick available with that index"); + return(NULL); +} + +/* Function to open a joystick for use. + The joystick to open is specified by the device index. + This should fill the nbuttons and naxes fields of the joystick structure. + It returns 0, or -1 if there is an error. + */ +int SDL_SYS_JoystickOpen(SDL_Joystick *joystick, int device_index) +{ + joystick->nbuttons = 14; + joystick->naxes = 2; + joystick->nhats = 0; + + return 0; +} + +/* Function to update the state of a joystick - called as a device poll. + * This function shouldn't update the joystick structure directly, + * but instead should call SDL_PrivateJoystick*() to deliver events + * and update joystick device state. + */ +void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) +{ + int i; + enum PspCtrlButtons buttons; + enum PspCtrlButtons changed; + unsigned char x, y; + static enum PspCtrlButtons old_buttons = 0; + static unsigned char old_x = 0, old_y = 0; + + SDL_SemWait(pad_sem); + buttons = pad.Buttons; + x = pad.Lx; + y = pad.Ly; + SDL_SemPost(pad_sem); + + /* Axes */ + if(old_x != x) { + SDL_PrivateJoystickAxis(joystick, 0, analog_map[x]); + old_x = x; + } + if(old_y != y) { + SDL_PrivateJoystickAxis(joystick, 1, analog_map[y]); + old_y = y; + } + + /* Buttons */ + changed = old_buttons ^ buttons; + old_buttons = buttons; + if(changed) { + for(i=0; i<sizeof(button_map)/sizeof(button_map[0]); i++) { + if(changed & button_map[i]) { + SDL_PrivateJoystickButton( + joystick, i, + (buttons & button_map[i]) ? + SDL_PRESSED : SDL_RELEASED); + } + } + } + + sceKernelDelayThread(0); +} + +/* Function to close a joystick after use */ +void SDL_SYS_JoystickClose(SDL_Joystick *joystick) +{ +} + +/* Function to perform any system-specific joystick related cleanup */ +void SDL_SYS_JoystickQuit(void) +{ + /* Cleanup Threads and Semaphore. */ + running = 0; + SDL_WaitThread(thread, NULL); + SDL_DestroySemaphore(pad_sem); +} + +SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID( int device_index ) +{ + SDL_JoystickGUID guid; + /* the GUID is just the first 16 chars of the name for now */ + const char *name = SDL_SYS_JoystickNameForDeviceIndex( device_index ); + SDL_zero( guid ); + SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) ); + return guid; +} + +SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick * joystick) +{ + SDL_JoystickGUID guid; + /* the GUID is just the first 16 chars of the name for now */ + const char *name = joystick->name; + SDL_zero( guid ); + SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) ); + return guid; +} + +#endif /* SDL_JOYSTICK_PSP */ + +/* vim: ts=4 sw=4 + */ |