diff options
Diffstat (limited to 'Source/external/SDL2/src/joystick/android/SDL_sysjoystick.c')
| -rw-r--r-- | Source/external/SDL2/src/joystick/android/SDL_sysjoystick.c | 710 |
1 files changed, 710 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/joystick/android/SDL_sysjoystick.c b/Source/external/SDL2/src/joystick/android/SDL_sysjoystick.c new file mode 100644 index 0000000..69b657f --- /dev/null +++ b/Source/external/SDL2/src/joystick/android/SDL_sysjoystick.c @@ -0,0 +1,710 @@ +/* + 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" + +#ifdef SDL_JOYSTICK_ANDROID + +#include <stdio.h> /* For the definition of NULL */ +#include "SDL_error.h" +#include "SDL_events.h" + +#include "SDL_joystick.h" +#include "SDL_hints.h" +#include "SDL_assert.h" +#include "SDL_timer.h" +#include "SDL_log.h" +#include "SDL_sysjoystick_c.h" +#include "../SDL_joystick_c.h" +#include "../../events/SDL_keyboard_c.h" +#include "../../core/android/SDL_android.h" +#include "../hidapi/SDL_hidapijoystick_c.h" + +#include "android/keycodes.h" + +/* As of platform android-14, android/keycodes.h is missing these defines */ +#ifndef AKEYCODE_BUTTON_1 +#define AKEYCODE_BUTTON_1 188 +#define AKEYCODE_BUTTON_2 189 +#define AKEYCODE_BUTTON_3 190 +#define AKEYCODE_BUTTON_4 191 +#define AKEYCODE_BUTTON_5 192 +#define AKEYCODE_BUTTON_6 193 +#define AKEYCODE_BUTTON_7 194 +#define AKEYCODE_BUTTON_8 195 +#define AKEYCODE_BUTTON_9 196 +#define AKEYCODE_BUTTON_10 197 +#define AKEYCODE_BUTTON_11 198 +#define AKEYCODE_BUTTON_12 199 +#define AKEYCODE_BUTTON_13 200 +#define AKEYCODE_BUTTON_14 201 +#define AKEYCODE_BUTTON_15 202 +#define AKEYCODE_BUTTON_16 203 +#endif + +#define ANDROID_ACCELEROMETER_NAME "Android Accelerometer" +#define ANDROID_ACCELEROMETER_DEVICE_ID INT_MIN +#define ANDROID_MAX_NBUTTONS 36 + +static SDL_joylist_item * JoystickByDeviceId(int device_id); + +static SDL_joylist_item *SDL_joylist = NULL; +static SDL_joylist_item *SDL_joylist_tail = NULL; +static int numjoysticks = 0; + + +/* Public domain CRC implementation adapted from: + http://home.thep.lu.se/~bjorn/crc/crc32_simple.c +*/ +static Uint32 crc32_for_byte(Uint32 r) +{ + int i; + for(i = 0; i < 8; ++i) { + r = (r & 1? 0: (Uint32)0xEDB88320L) ^ r >> 1; + } + return r ^ (Uint32)0xFF000000L; +} + +static Uint32 crc32(const void *data, int count) +{ + Uint32 crc = 0; + int i; + for(i = 0; i < count; ++i) { + crc = crc32_for_byte((Uint8)crc ^ ((const Uint8*)data)[i]) ^ crc >> 8; + } + return crc; +} + +/* Function to convert Android keyCodes into SDL ones. + * This code manipulation is done to get a sequential list of codes. + * FIXME: This is only suited for the case where we use a fixed number of buttons determined by ANDROID_MAX_NBUTTONS + */ +static int +keycode_to_SDL(int keycode) +{ + /* FIXME: If this function gets too unwieldy in the future, replace with a lookup table */ + int button = 0; + switch (keycode) { + /* Some gamepad buttons (API 9) */ + case AKEYCODE_BUTTON_A: + button = SDL_CONTROLLER_BUTTON_A; + break; + case AKEYCODE_BUTTON_B: + button = SDL_CONTROLLER_BUTTON_B; + break; + case AKEYCODE_BUTTON_X: + button = SDL_CONTROLLER_BUTTON_X; + break; + case AKEYCODE_BUTTON_Y: + button = SDL_CONTROLLER_BUTTON_Y; + break; + case AKEYCODE_BUTTON_L1: + button = SDL_CONTROLLER_BUTTON_LEFTSHOULDER; + break; + case AKEYCODE_BUTTON_R1: + button = SDL_CONTROLLER_BUTTON_RIGHTSHOULDER; + break; + case AKEYCODE_BUTTON_THUMBL: + button = SDL_CONTROLLER_BUTTON_LEFTSTICK; + break; + case AKEYCODE_BUTTON_THUMBR: + button = SDL_CONTROLLER_BUTTON_RIGHTSTICK; + break; + case AKEYCODE_BUTTON_START: + button = SDL_CONTROLLER_BUTTON_START; + break; + case AKEYCODE_BACK: + case AKEYCODE_BUTTON_SELECT: + button = SDL_CONTROLLER_BUTTON_BACK; + break; + case AKEYCODE_BUTTON_MODE: + button = SDL_CONTROLLER_BUTTON_GUIDE; + break; + case AKEYCODE_BUTTON_L2: + button = SDL_CONTROLLER_BUTTON_MAX; /* Not supported by GameController */ + break; + case AKEYCODE_BUTTON_R2: + button = SDL_CONTROLLER_BUTTON_MAX+1; /* Not supported by GameController */ + break; + case AKEYCODE_BUTTON_C: + button = SDL_CONTROLLER_BUTTON_MAX+2; /* Not supported by GameController */ + break; + case AKEYCODE_BUTTON_Z: + button = SDL_CONTROLLER_BUTTON_MAX+3; /* Not supported by GameController */ + break; + + /* D-Pad key codes (API 1) */ + case AKEYCODE_DPAD_UP: + button = SDL_CONTROLLER_BUTTON_DPAD_UP; + break; + case AKEYCODE_DPAD_DOWN: + button = SDL_CONTROLLER_BUTTON_DPAD_DOWN; + break; + case AKEYCODE_DPAD_LEFT: + button = SDL_CONTROLLER_BUTTON_DPAD_LEFT; + break; + case AKEYCODE_DPAD_RIGHT: + button = SDL_CONTROLLER_BUTTON_DPAD_RIGHT; + break; + case AKEYCODE_DPAD_CENTER: + /* This is handled better by applications as the A button */ + /*button = SDL_CONTROLLER_BUTTON_MAX+4;*/ /* Not supported by GameController */ + button = SDL_CONTROLLER_BUTTON_A; + break; + + /* More gamepad buttons (API 12), these get mapped to 20...35*/ + case AKEYCODE_BUTTON_1: + case AKEYCODE_BUTTON_2: + case AKEYCODE_BUTTON_3: + case AKEYCODE_BUTTON_4: + case AKEYCODE_BUTTON_5: + case AKEYCODE_BUTTON_6: + case AKEYCODE_BUTTON_7: + case AKEYCODE_BUTTON_8: + case AKEYCODE_BUTTON_9: + case AKEYCODE_BUTTON_10: + case AKEYCODE_BUTTON_11: + case AKEYCODE_BUTTON_12: + case AKEYCODE_BUTTON_13: + case AKEYCODE_BUTTON_14: + case AKEYCODE_BUTTON_15: + case AKEYCODE_BUTTON_16: + button = keycode - AKEYCODE_BUTTON_1 + SDL_CONTROLLER_BUTTON_MAX + 5; + break; + + default: + return -1; + /* break; -Wunreachable-code-break */ + } + + /* This is here in case future generations, probably with six fingers per hand, + * happily add new cases up above and forget to update the max number of buttons. + */ + SDL_assert(button < ANDROID_MAX_NBUTTONS); + return button; +} + +static SDL_Scancode +button_to_scancode(int button) +{ + switch (button) { + case SDL_CONTROLLER_BUTTON_A: + return SDL_SCANCODE_RETURN; + case SDL_CONTROLLER_BUTTON_B: + return SDL_SCANCODE_ESCAPE; + case SDL_CONTROLLER_BUTTON_BACK: + return SDL_SCANCODE_ESCAPE; + case SDL_CONTROLLER_BUTTON_DPAD_UP: + return SDL_SCANCODE_UP; + case SDL_CONTROLLER_BUTTON_DPAD_DOWN: + return SDL_SCANCODE_DOWN; + case SDL_CONTROLLER_BUTTON_DPAD_LEFT: + return SDL_SCANCODE_LEFT; + case SDL_CONTROLLER_BUTTON_DPAD_RIGHT: + return SDL_SCANCODE_RIGHT; + } + + /* Unsupported button */ + return SDL_SCANCODE_UNKNOWN; +} + +int +Android_OnPadDown(int device_id, int keycode) +{ + SDL_joylist_item *item; + int button = keycode_to_SDL(keycode); + if (button >= 0) { + item = JoystickByDeviceId(device_id); + if (item && item->joystick) { + SDL_PrivateJoystickButton(item->joystick, button, SDL_PRESSED); + } else { + SDL_SendKeyboardKey(SDL_PRESSED, button_to_scancode(button)); + } + return 0; + } + + return -1; +} + +int +Android_OnPadUp(int device_id, int keycode) +{ + SDL_joylist_item *item; + int button = keycode_to_SDL(keycode); + if (button >= 0) { + item = JoystickByDeviceId(device_id); + if (item && item->joystick) { + SDL_PrivateJoystickButton(item->joystick, button, SDL_RELEASED); + } else { + SDL_SendKeyboardKey(SDL_RELEASED, button_to_scancode(button)); + } + return 0; + } + + return -1; +} + +int +Android_OnJoy(int device_id, int axis, float value) +{ + /* Android gives joy info normalized as [-1.0, 1.0] or [0.0, 1.0] */ + SDL_joylist_item *item = JoystickByDeviceId(device_id); + if (item && item->joystick) { + SDL_PrivateJoystickAxis(item->joystick, axis, (Sint16) (32767.*value)); + } + + return 0; +} + +int +Android_OnHat(int device_id, int hat_id, int x, int y) +{ + const int DPAD_UP_MASK = (1 << SDL_CONTROLLER_BUTTON_DPAD_UP); + const int DPAD_DOWN_MASK = (1 << SDL_CONTROLLER_BUTTON_DPAD_DOWN); + const int DPAD_LEFT_MASK = (1 << SDL_CONTROLLER_BUTTON_DPAD_LEFT); + const int DPAD_RIGHT_MASK = (1 << SDL_CONTROLLER_BUTTON_DPAD_RIGHT); + + if (x >= -1 && x <= 1 && y >= -1 && y <= 1) { + SDL_joylist_item *item = JoystickByDeviceId(device_id); + if (item && item->joystick) { + int dpad_state = 0; + int dpad_delta; + if (x < 0) { + dpad_state |= DPAD_LEFT_MASK; + } else if (x > 0) { + dpad_state |= DPAD_RIGHT_MASK; + } + if (y < 0) { + dpad_state |= DPAD_UP_MASK; + } else if (y > 0) { + dpad_state |= DPAD_DOWN_MASK; + } + + dpad_delta = (dpad_state ^ item->dpad_state); + if (dpad_delta) { + if (dpad_delta & DPAD_UP_MASK) { + SDL_PrivateJoystickButton(item->joystick, SDL_CONTROLLER_BUTTON_DPAD_UP, (dpad_state & DPAD_UP_MASK) ? SDL_PRESSED : SDL_RELEASED); + } + if (dpad_delta & DPAD_DOWN_MASK) { + SDL_PrivateJoystickButton(item->joystick, SDL_CONTROLLER_BUTTON_DPAD_DOWN, (dpad_state & DPAD_DOWN_MASK) ? SDL_PRESSED : SDL_RELEASED); + } + if (dpad_delta & DPAD_LEFT_MASK) { + SDL_PrivateJoystickButton(item->joystick, SDL_CONTROLLER_BUTTON_DPAD_LEFT, (dpad_state & DPAD_LEFT_MASK) ? SDL_PRESSED : SDL_RELEASED); + } + if (dpad_delta & DPAD_RIGHT_MASK) { + SDL_PrivateJoystickButton(item->joystick, SDL_CONTROLLER_BUTTON_DPAD_RIGHT, (dpad_state & DPAD_RIGHT_MASK) ? SDL_PRESSED : SDL_RELEASED); + } + item->dpad_state = dpad_state; + } + } + return 0; + } + + return -1; +} + + +int +Android_AddJoystick(int device_id, const char *name, const char *desc, int vendor_id, int product_id, SDL_bool is_accelerometer, int button_mask, int naxes, int nhats, int nballs) +{ + SDL_joylist_item *item; + SDL_JoystickGUID guid; + Uint16 *guid16 = (Uint16 *)guid.data; + int i; + int axis_mask; + + + if (!SDL_GetHintBoolean(SDL_HINT_TV_REMOTE_AS_JOYSTICK, SDL_TRUE)) { + /* Ignore devices that aren't actually controllers (e.g. remotes), they'll be handled as keyboard input */ + if (naxes < 2 && nhats < 1) { + return -1; + } + } + + if (JoystickByDeviceId(device_id) != NULL || name == NULL) { + return -1; + } + +#ifdef SDL_JOYSTICK_HIDAPI + if (HIDAPI_IsDevicePresent(vendor_id, product_id, 0)) { + /* The HIDAPI driver is taking care of this device */ + return -1; + } +#endif + +#ifdef DEBUG_JOYSTICK + SDL_Log("Joystick: %s, descriptor %s, vendor = 0x%.4x, product = 0x%.4x, %d axes, %d hats\n", name, desc, vendor_id, product_id, naxes, nhats); +#endif + + /* Add the available buttons and axes + The axis mask should probably come from Java where there is more information about the axes... + */ + axis_mask = 0; + if (!is_accelerometer) { + if (naxes >= 2) { + axis_mask |= ((1 << SDL_CONTROLLER_AXIS_LEFTX) | (1 << SDL_CONTROLLER_AXIS_LEFTY)); + } + if (naxes >= 4) { + axis_mask |= ((1 << SDL_CONTROLLER_AXIS_RIGHTX) | (1 << SDL_CONTROLLER_AXIS_RIGHTY)); + } + if (naxes >= 6) { + axis_mask |= ((1 << SDL_CONTROLLER_AXIS_TRIGGERLEFT) | (1 << SDL_CONTROLLER_AXIS_TRIGGERRIGHT)); + } + } + + if (nhats > 0) { + /* Hat is translated into DPAD buttons */ + button_mask |= ((1 << SDL_CONTROLLER_BUTTON_DPAD_UP) | + (1 << SDL_CONTROLLER_BUTTON_DPAD_DOWN) | + (1 << SDL_CONTROLLER_BUTTON_DPAD_LEFT) | + (1 << SDL_CONTROLLER_BUTTON_DPAD_RIGHT)); + nhats = 0; + } + + SDL_memset(guid.data, 0, sizeof(guid.data)); + + /* We only need 16 bits for each of these; space them out to fill 128. */ + /* Byteswap so devices get same GUID on little/big endian platforms. */ + *guid16++ = SDL_SwapLE16(SDL_HARDWARE_BUS_BLUETOOTH); + *guid16++ = 0; + + if (vendor_id && product_id) { + *guid16++ = SDL_SwapLE16(vendor_id); + *guid16++ = 0; + *guid16++ = SDL_SwapLE16(product_id); + *guid16++ = 0; + } else { + Uint32 crc = crc32(desc, SDL_strlen(desc)); + SDL_memcpy(guid16, desc, SDL_min(2*sizeof(*guid16), SDL_strlen(desc))); + guid16 += 2; + *(Uint32 *)guid16 = SDL_SwapLE32(crc); + guid16 += 2; + } + + *guid16++ = SDL_SwapLE16(button_mask); + *guid16++ = SDL_SwapLE16(axis_mask); + + item = (SDL_joylist_item *) SDL_malloc(sizeof (SDL_joylist_item)); + if (item == NULL) { + return -1; + } + + SDL_zerop(item); + item->guid = guid; + item->device_id = device_id; + item->name = SDL_strdup(name); + if (item->name == NULL) { + SDL_free(item); + return -1; + } + + item->is_accelerometer = is_accelerometer; + if (button_mask == 0xFFFFFFFF) { + item->nbuttons = ANDROID_MAX_NBUTTONS; + } else { + for (i = 0; i < sizeof(button_mask)*8; ++i) { + if (button_mask & (1 << i)) { + item->nbuttons = i+1; + } + } + } + item->naxes = naxes; + item->nhats = nhats; + item->nballs = nballs; + item->device_instance = SDL_GetNextJoystickInstanceID(); + if (SDL_joylist_tail == NULL) { + SDL_joylist = SDL_joylist_tail = item; + } else { + SDL_joylist_tail->next = item; + SDL_joylist_tail = item; + } + + /* Need to increment the joystick count before we post the event */ + ++numjoysticks; + + SDL_PrivateJoystickAdded(item->device_instance); + +#ifdef DEBUG_JOYSTICK + SDL_Log("Added joystick %s with device_id %d", name, device_id); +#endif + + return numjoysticks; +} + +int +Android_RemoveJoystick(int device_id) +{ + SDL_joylist_item *item = SDL_joylist; + SDL_joylist_item *prev = NULL; + + /* Don't call JoystickByDeviceId here or there'll be an infinite loop! */ + while (item != NULL) { + if (item->device_id == device_id) { + break; + } + prev = item; + item = item->next; + } + + if (item == NULL) { + return -1; + } + + if (item->joystick) { + item->joystick->hwdata = NULL; + } + + if (prev != NULL) { + prev->next = item->next; + } else { + SDL_assert(SDL_joylist == item); + SDL_joylist = item->next; + } + if (item == SDL_joylist_tail) { + SDL_joylist_tail = prev; + } + + /* Need to decrement the joystick count before we post the event */ + --numjoysticks; + + SDL_PrivateJoystickRemoved(item->device_instance); + +#ifdef DEBUG_JOYSTICK + SDL_Log("Removed joystick with device_id %d", device_id); +#endif + + SDL_free(item->name); + SDL_free(item); + return numjoysticks; +} + + +static void ANDROID_JoystickDetect(); + +static int +ANDROID_JoystickInit(void) +{ + ANDROID_JoystickDetect(); + + if (SDL_GetHintBoolean(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, SDL_TRUE)) { + /* Default behavior, accelerometer as joystick */ + Android_AddJoystick(ANDROID_ACCELEROMETER_DEVICE_ID, ANDROID_ACCELEROMETER_NAME, ANDROID_ACCELEROMETER_NAME, 0, 0, SDL_TRUE, 0, 3, 0, 0); + } + return 0; + +} + +static int +ANDROID_JoystickGetCount(void) +{ + return numjoysticks; +} + +static void +ANDROID_JoystickDetect(void) +{ + /* Support for device connect/disconnect is API >= 16 only, + * so we poll every three seconds + * Ref: http://developer.android.com/reference/android/hardware/input/InputManager.InputDeviceListener.html + */ + static Uint32 timeout = 0; + if (!timeout || SDL_TICKS_PASSED(SDL_GetTicks(), timeout)) { + timeout = SDL_GetTicks() + 3000; + Android_JNI_PollInputDevices(); + } +} + +static SDL_joylist_item * +JoystickByDevIndex(int device_index) +{ + SDL_joylist_item *item = SDL_joylist; + + if ((device_index < 0) || (device_index >= numjoysticks)) { + return NULL; + } + + while (device_index > 0) { + SDL_assert(item != NULL); + device_index--; + item = item->next; + } + + return item; +} + +static SDL_joylist_item * +JoystickByDeviceId(int device_id) +{ + SDL_joylist_item *item = SDL_joylist; + + while (item != NULL) { + if (item->device_id == device_id) { + return item; + } + item = item->next; + } + + /* Joystick not found, try adding it */ + ANDROID_JoystickDetect(); + + while (item != NULL) { + if (item->device_id == device_id) { + return item; + } + item = item->next; + } + + return NULL; +} + +static const char * +ANDROID_JoystickGetDeviceName(int device_index) +{ + return JoystickByDevIndex(device_index)->name; +} + +static int +ANDROID_JoystickGetDevicePlayerIndex(int device_index) +{ + return -1; +} + +static SDL_JoystickGUID +ANDROID_JoystickGetDeviceGUID(int device_index) +{ + return JoystickByDevIndex(device_index)->guid; +} + +static SDL_JoystickID +ANDROID_JoystickGetDeviceInstanceID(int device_index) +{ + return JoystickByDevIndex(device_index)->device_instance; +} + +static int +ANDROID_JoystickOpen(SDL_Joystick * joystick, int device_index) +{ + SDL_joylist_item *item = JoystickByDevIndex(device_index); + + if (item == NULL) { + return SDL_SetError("No such device"); + } + + if (item->joystick != NULL) { + return SDL_SetError("Joystick already opened"); + } + + joystick->instance_id = item->device_instance; + joystick->hwdata = (struct joystick_hwdata *) item; + item->joystick = joystick; + joystick->nhats = item->nhats; + joystick->nballs = item->nballs; + joystick->nbuttons = item->nbuttons; + joystick->naxes = item->naxes; + + return (0); +} + +static int +ANDROID_JoystickRumble(SDL_Joystick * joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms) +{ + return SDL_Unsupported(); +} + +static void +ANDROID_JoystickUpdate(SDL_Joystick * joystick) +{ + SDL_joylist_item *item = (SDL_joylist_item *) joystick->hwdata; + + if (item == NULL) { + return; + } + + if (item->is_accelerometer) { + int i; + Sint16 value; + float values[3]; + + if (Android_JNI_GetAccelerometerValues(values)) { + for (i = 0; i < 3; i++) { + if (values[i] > 1.0f) { + values[i] = 1.0f; + } else if (values[i] < -1.0f) { + values[i] = -1.0f; + } + + value = (Sint16)(values[i] * 32767.0f); + SDL_PrivateJoystickAxis(item->joystick, i, value); + } + } + } +} + +static void +ANDROID_JoystickClose(SDL_Joystick * joystick) +{ + SDL_joylist_item *item = (SDL_joylist_item *) joystick->hwdata; + if (item) { + item->joystick = NULL; + } +} + +static void +ANDROID_JoystickQuit(void) +{ +/* We don't have any way to scan for joysticks at init, so don't wipe the list + * of joysticks here in case this is a reinit. + */ +#if 0 + SDL_joylist_item *item = NULL; + SDL_joylist_item *next = NULL; + + for (item = SDL_joylist; item; item = next) { + next = item->next; + SDL_free(item->name); + SDL_free(item); + } + + SDL_joylist = SDL_joylist_tail = NULL; + + numjoysticks = 0; +#endif /* 0 */ +} + +SDL_JoystickDriver SDL_ANDROID_JoystickDriver = +{ + ANDROID_JoystickInit, + ANDROID_JoystickGetCount, + ANDROID_JoystickDetect, + ANDROID_JoystickGetDeviceName, + ANDROID_JoystickGetDevicePlayerIndex, + ANDROID_JoystickGetDeviceGUID, + ANDROID_JoystickGetDeviceInstanceID, + ANDROID_JoystickOpen, + ANDROID_JoystickRumble, + ANDROID_JoystickUpdate, + ANDROID_JoystickClose, + ANDROID_JoystickQuit, +}; + +#endif /* SDL_JOYSTICK_ANDROID */ + +/* vi: set ts=4 sw=4 expandtab: */ |