/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 *  Copyright (C) 2011-2017 - Daniel De Matteis
 *  Copyright (C) 2012-2015 - Michael Lelli
 *  Copyright (C) 2013-2014 - Steven Crowe
 *
 *  RetroArch 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.
 *
 *  RetroArch 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 RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include <unistd.h>
#include <dlfcn.h>

#include <android/keycodes.h>

#include <dynamic/dylib.h>
#include <retro_inline.h>
#include <string/stdstring.h>
#include <retro_miscellaneous.h>

#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif

#include "../../config.def.h"

#ifdef HAVE_MENU
#include "../../menu/menu_driver.h"
#endif


#include "../../command.h"
#include "../../frontend/drivers/platform_unix.h"
#include "../drivers_keyboard/keyboard_event_android.h"
#include "../../tasks/tasks_internal.h"
#include "../../performance_counters.h"

#include "../../configuration.h"
#include "../../retroarch.h"
#include "../../runloop.h"

#define MAX_TOUCH 16
#define MAX_NUM_KEYBOARDS 3
#define DEFAULT_ASENSOR_EVENT_RATE 60

/* If using an SDK lower than 14 then add missing mouse button codes */
#if __ANDROID_API__ < 14
enum {
    AMOTION_EVENT_BUTTON_PRIMARY = 1 << 0,
    AMOTION_EVENT_BUTTON_SECONDARY = 1 << 1,
    AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2,
    AMOTION_EVENT_BUTTON_BACK = 1 << 3,
    AMOTION_EVENT_BUTTON_FORWARD = 1 << 4,
    AMOTION_EVENT_AXIS_VSCROLL = 9,
    AMOTION_EVENT_ACTION_HOVER_MOVE = 7,
    AINPUT_SOURCE_STYLUS = 0x00004000
};
#endif
/* If using an NDK lower than 16b then add missing definition */
#ifndef __ANDROID_API_O_MR1__
enum {
   AINPUT_SOURCE_MOUSE_RELATIVE = 0x00020000 | AINPUT_SOURCE_CLASS_NAVIGATION
};
#endif

/* If using an SDK lower than 24 then add missing relative axis codes */
#ifndef AMOTION_EVENT_AXIS_RELATIVE_X
#define AMOTION_EVENT_AXIS_RELATIVE_X 27
#endif

#ifndef AMOTION_EVENT_AXIS_RELATIVE_Y
#define AMOTION_EVENT_AXIS_RELATIVE_Y 28
#endif

/* Use this to enable/disable using the touch screen as mouse */
#define ENABLE_TOUCH_SCREEN_MOUSE 0

#define AKEYCODE_ASSIST 219

#define LAST_KEYCODE AKEYCODE_ASSIST

#define MAX_KEYS ((LAST_KEYCODE + 7) / 8)

/* First ports are used to keep track of gamepad states.
 * Last port is used for keyboard state */
static uint8_t android_key_state[DEFAULT_MAX_PADS + 1][MAX_KEYS];

#define ANDROID_KEYBOARD_PORT_INPUT_PRESSED(binds, id) (BIT_GET(android_key_state[ANDROID_KEYBOARD_PORT], rarch_keysym_lut[(binds)[(id)].key]))

#define ANDROID_KEYBOARD_INPUT_PRESSED(key) (BIT_GET(android_key_state[0], (key)))

uint8_t *android_keyboard_state_get(unsigned port)
{
   return android_key_state[port];
}

typedef struct
{
   float x;
   float y;
   float z;
} sensor_t;

struct input_pointer
{
   int16_t x, y;
   int16_t confined_x, confined_y;
   int16_t full_x, full_y;
};

static int pad_id1 = -1;
static int pad_id2 = -1;
static int kbd_id[MAX_NUM_KEYBOARDS];
static int kbd_num = 0;

enum
{
   AXIS_X        = 0,
   AXIS_Y        = 1,
   AXIS_Z        = 11,
   AXIS_RZ       = 14,
   AXIS_HAT_X    = 15,
   AXIS_HAT_Y    = 16,
   AXIS_LTRIGGER = 17,
   AXIS_RTRIGGER = 18,
   AXIS_GAS      = 22,
   AXIS_BRAKE    = 23
};

typedef struct state_device
{
   int id;
   int port;
   char name[256];
} state_device_t;

typedef struct android_input
{
   int64_t quick_tap_time;
   state_device_t pad_states[MAX_USERS];        /* int alignment */
   int mouse_x, mouse_y;
   int16_t mouse_x_viewport_screen, mouse_y_viewport_screen;
   int16_t mouse_x_viewport, mouse_y_viewport;
   int mouse_x_delta, mouse_y_delta;
   int mouse_l, mouse_r, mouse_m, mouse_wu, mouse_wd;
   bool mouse_activated;
   unsigned pads_connected;
   unsigned pointer_count;
   sensor_t accelerometer_state;                /* float alignment */
   sensor_t gyroscope_state;                    /* float alignment */
   float mouse_x_prev, mouse_y_prev;
   struct input_pointer pointer[MAX_TOUCH];     /* int16_t alignment */
   char device_model[256];
} android_input_t;

static void frontend_android_get_version_sdk(int32_t *sdk);
static void frontend_android_get_name(char *s, size_t len);

bool (*engine_lookup_name)(char *buf,
      int *vendorId, int *productId, size_t len, int id);
void (*engine_handle_dpad)(struct android_app *, AInputEvent*, int, int);

static void android_input_poll_input_gingerbread(android_input_t *android);
static void android_input_poll_input_default(android_input_t *android);
static void (*android_input_poll_input)(android_input_t *android);

static bool android_input_set_sensor_state(void *data, unsigned port,
      enum retro_sensor_action action, unsigned event_rate);

extern float AMotionEvent_getAxisValue(const AInputEvent* motion_event,
      int32_t axis, size_t pointer_idx);

static typeof(AMotionEvent_getAxisValue) *p_AMotionEvent_getAxisValue;

#define AMotionEvent_getAxisValue (*p_AMotionEvent_getAxisValue)

extern int32_t AMotionEvent_getButtonState(const AInputEvent* motion_event);

static typeof(AMotionEvent_getButtonState) *p_AMotionEvent_getButtonState;

#define AMotionEvent_getButtonState (*p_AMotionEvent_getButtonState)

#ifdef HAVE_DYLIB
static void *libandroid_handle;
#endif

static void android_keyboard_free(void)
{
    unsigned i, j;

    for (i = 0; i < DEFAULT_MAX_PADS; i++)
        for (j = 0; j < MAX_KEYS; j++)
            android_key_state[i][j] = 0;

    for (i = 0; i < (unsigned) kbd_num; i++)
        kbd_id[i] = -1;

    kbd_num = 0;
}

static bool android_input_lookup_name_prekitkat(char *s,
      int *vendorId, int *productId, size_t len, int id)
{
   jobject name      = NULL;
   jmethodID getName = NULL;
   jobject device    = NULL;
   jmethodID method  = NULL;
   jclass    class   = 0;
   const char *str   = NULL;
   JNIEnv     *env   = (JNIEnv*)jni_thread_getenv();

   if (!env)
      return false;

   FIND_CLASS(env, class, "android/view/InputDevice");
   if (!class)
      return false;

   GET_STATIC_METHOD_ID(env, method, class, "getDevice",
         "(I)Landroid/view/InputDevice;");
   if (!method)
      return false;

   CALL_OBJ_STATIC_METHOD_PARAM(env, device, class, method, (jint)id);
   if (!device)
      return false;

   GET_METHOD_ID(env, getName, class, "getName", "()Ljava/lang/String;");
   if (!getName)
      return false;

   CALL_OBJ_METHOD(env, name, device, getName);
   if (!name)
      return false;

   s[0] = '\0';
   str  = (*env)->GetStringUTFChars(env, name, 0);
   if (str)
      strlcpy(s, str, len);
   (*env)->ReleaseStringUTFChars(env, name, str);

   return true;
}

static bool android_input_lookup_name(char *s,
      int *vendorId, int *productId, size_t len, int id)
{
   jmethodID getVendorId  = NULL;
   jmethodID getProductId = NULL;
   jmethodID getName      = NULL;
   jobject device         = NULL;
   jobject name           = NULL;
   jmethodID method       = NULL;
   jclass class           = NULL;
   const char *str        = NULL;
   JNIEnv     *env        = (JNIEnv*)jni_thread_getenv();

   if (!env)
      return false;

   FIND_CLASS(env, class, "android/view/InputDevice");
   if (!class)
      return false;

   GET_STATIC_METHOD_ID(env, method, class, "getDevice",
         "(I)Landroid/view/InputDevice;");
   if (!method)
      return false;

   CALL_OBJ_STATIC_METHOD_PARAM(env, device, class, method, (jint)id);
   if (!device)
      return false;

   GET_METHOD_ID(env, getName, class, "getName", "()Ljava/lang/String;");
   if (!getName)
      return false;

   CALL_OBJ_METHOD(env, name, device, getName);
   if (!name)
      return false;

   s[0] = '\0';

   str = (*env)->GetStringUTFChars(env, name, 0);
   if (str)
      strlcpy(s, str, len);
   (*env)->ReleaseStringUTFChars(env, name, str);

   GET_METHOD_ID(env, getVendorId, class, "getVendorId", "()I");
   if (!getVendorId)
      return false;

   CALL_INT_METHOD(env, *vendorId, device, getVendorId);

   GET_METHOD_ID(env, getProductId, class, "getProductId", "()I");
   if (!getProductId)
      return false;

   *productId = 0;
   CALL_INT_METHOD(env, *productId, device, getProductId);

   return true;
}

static bool android_input_can_be_keyboard_jni(int id)
{
    jmethodID getKeyboardType  = NULL;
    jobject device             = NULL;
    jint keyboard_type         = -1;
    jmethodID method           = NULL;
    jclass class               = NULL;
    const char *str            = NULL;
    JNIEnv     *env            = (JNIEnv*)jni_thread_getenv();

    if (!env)
        return false;

    FIND_CLASS(env, class, "android/view/InputDevice");
    if (!class)
        return false;

    GET_STATIC_METHOD_ID(env, method, class, "getDevice",
                         "(I)Landroid/view/InputDevice;");
    if (!method)
        return false;

    CALL_OBJ_STATIC_METHOD_PARAM(env, device, class, method, (jint)id);
    if (!device)
        return false;

    GET_METHOD_ID(env, getKeyboardType, class, "getKeyboardType", "()I");
    if (!getKeyboardType)
        return false;

    CALL_INT_METHOD(env, keyboard_type, device, getKeyboardType);
    if (keyboard_type < 0)
        return false;

    return keyboard_type == AINPUT_KEYBOARD_TYPE_ALPHABETIC;
}

bool android_input_can_be_keyboard(void *data, int port)
{
    android_input_t *android = (android_input_t *) data;
    if (!android)
        return false;

    if (port < 0 || port >= android->pads_connected)
        return false;

    state_device_t *device = &android->pad_states[port];
    if (!device->id && string_is_empty(device->name))
        return false;

    return android_input_can_be_keyboard_jni(device->id);
}

static void android_input_poll_main_cmd(void)
{
   int8_t cmd;
   struct android_app *android_app = (struct android_app*)g_android;

   if (read(android_app->msgread, &cmd, sizeof(cmd)) != sizeof(cmd))
      cmd = -1;

   switch (cmd)
   {
      case APP_CMD_REINIT_DONE:
         slock_lock(android_app->mutex);

         android_app->reinitRequested = 0;

         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);
         break;

      case APP_CMD_INPUT_CHANGED:
         slock_lock(android_app->mutex);

         if (android_app->inputQueue)
            AInputQueue_detachLooper(android_app->inputQueue);

         android_app->inputQueue = android_app->pendingInputQueue;

         if (android_app->inputQueue)
            AInputQueue_attachLooper(android_app->inputQueue,
                  android_app->looper, LOOPER_ID_INPUT, NULL,
                  NULL);

         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);

         break;

      case APP_CMD_INIT_WINDOW:
         slock_lock(android_app->mutex);
         android_app->window = android_app->pendingWindow;
         android_app->reinitRequested = 1;
         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);

         break;

      case APP_CMD_SAVE_STATE:
         slock_lock(android_app->mutex);
         android_app->stateSaved = 1;
         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);
         break;

      case APP_CMD_RESUME:
      case APP_CMD_START:
      case APP_CMD_PAUSE:
      case APP_CMD_STOP:
         slock_lock(android_app->mutex);
         android_app->activityState = cmd;
         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);
         break;

      case APP_CMD_CONFIG_CHANGED:
         AConfiguration_fromAssetManager(android_app->config,
               android_app->activity->assetManager);
         break;
      case APP_CMD_TERM_WINDOW:
         slock_lock(android_app->mutex);

         /* The window is being hidden or closed, clean it up. */
         /* terminate display/EGL context here */

         android_app->window = NULL;
         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);
         break;

      case APP_CMD_GAINED_FOCUS:
         {
            runloop_state_t *runloop_st = runloop_state_get_ptr();
            bool enable_accelerometer   = (android_app->sensor_state_mask &
                  (UINT64_C(1) << RETRO_SENSOR_ACCELEROMETER_DISABLE));
            bool enable_gyroscope       = (android_app->sensor_state_mask &
                  (UINT64_C(1) << RETRO_SENSOR_GYROSCOPE_DISABLE));


            runloop_st->flags &= ~(RUNLOOP_FLAG_PAUSED
                                 | RUNLOOP_FLAG_IDLE);
            video_driver_unset_stub_frame();

            if (enable_accelerometer)
               input_set_sensor_state(0,
                     RETRO_SENSOR_ACCELEROMETER_ENABLE,
                     android_app->accelerometer_event_rate);

            if (enable_gyroscope)
               input_set_sensor_state(0,
                     RETRO_SENSOR_GYROSCOPE_ENABLE,
                     android_app->gyroscope_event_rate);
         }
         slock_lock(android_app->mutex);
         android_app->unfocused = false;
         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);
         break;
      case APP_CMD_LOST_FOCUS:
         {
            runloop_state_t *runloop_st = runloop_state_get_ptr();
            bool disable_accelerometer  = (android_app->sensor_state_mask &
                  (UINT64_C(1) << RETRO_SENSOR_ACCELEROMETER_ENABLE)) &&
                        android_app->accelerometerSensor;
            bool disable_gyroscope      = (android_app->sensor_state_mask &
                  (UINT64_C(1) << RETRO_SENSOR_GYROSCOPE_ENABLE)) &&
                        android_app->gyroscopeSensor;

            runloop_st->flags |=  (RUNLOOP_FLAG_PAUSED
                                 | RUNLOOP_FLAG_IDLE);
            video_driver_set_stub_frame();

            /* Avoid draining battery while app is not being used. */
            if (disable_accelerometer)
               input_set_sensor_state(0,
                     RETRO_SENSOR_ACCELEROMETER_DISABLE,
                     android_app->accelerometer_event_rate);

            if (disable_gyroscope)
               input_set_sensor_state(0,
                     RETRO_SENSOR_GYROSCOPE_DISABLE,
                     android_app->gyroscope_event_rate);
         }
         slock_lock(android_app->mutex);
         android_app->unfocused = true;
         scond_broadcast(android_app->cond);
         slock_unlock(android_app->mutex);
         break;

      case APP_CMD_DESTROY:
         android_app->destroyRequested = 1;
         break;
   }
}

static void engine_handle_dpad_default(struct android_app *android,
      AInputEvent *event, int port, int source)
{
   size_t motion_ptr = AMotionEvent_getAction(event) >>
      AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
   float x           = AMotionEvent_getX(event, motion_ptr);
   float y           = AMotionEvent_getY(event, motion_ptr);

   android->analog_state[port][0] = (int16_t)(x * 32767.0f);
   android->analog_state[port][1] = (int16_t)(y * 32767.0f);
}

#ifdef HAVE_DYLIB
static void engine_handle_dpad_getaxisvalue(struct android_app *android,
      AInputEvent *event, int port, int source)
{
   size_t motion_ptr = AMotionEvent_getAction(event) >>
      AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
   float x           = AMotionEvent_getAxisValue(event, AXIS_X, motion_ptr);
   float y           = AMotionEvent_getAxisValue(event, AXIS_Y, motion_ptr);
   float z           = AMotionEvent_getAxisValue(event, AXIS_Z, motion_ptr);
   float rz          = AMotionEvent_getAxisValue(event, AXIS_RZ, motion_ptr);
   float hatx        = AMotionEvent_getAxisValue(event, AXIS_HAT_X, motion_ptr);
   float haty        = AMotionEvent_getAxisValue(event, AXIS_HAT_Y, motion_ptr);
   float ltrig       = AMotionEvent_getAxisValue(event, AXIS_LTRIGGER, motion_ptr);
   float rtrig       = AMotionEvent_getAxisValue(event, AXIS_RTRIGGER, motion_ptr);
   float brake       = AMotionEvent_getAxisValue(event, AXIS_BRAKE, motion_ptr);
   float gas         = AMotionEvent_getAxisValue(event, AXIS_GAS, motion_ptr);

   android->hat_state[port][0]    = (int)hatx;
   android->hat_state[port][1]    = (int)haty;

   /* XXX: this could be a loop instead, but do we really want to
    * loop through every axis? */
   android->analog_state[port][0] = (int16_t)(x * 32767.0f);
   android->analog_state[port][1] = (int16_t)(y * 32767.0f);
   android->analog_state[port][2] = (int16_t)(z * 32767.0f);
   android->analog_state[port][3] = (int16_t)(rz * 32767.0f);
   android->analog_state[port][6] = (int16_t)(ltrig * 32767.0f);
   android->analog_state[port][7] = (int16_t)(rtrig * 32767.0f);
   android->analog_state[port][8] = (int16_t)(brake * 32767.0f);
   android->analog_state[port][9] = (int16_t)(gas * 32767.0f);
}
#endif

static bool android_input_init_handle(void)
{
#ifdef HAVE_DYLIB
   if (libandroid_handle != NULL) /* already initialized */
      return true;
#if defined (ANDROID_AARCH64) || defined(ANDROID_X64)
   if ((libandroid_handle = dlopen("/system/lib64/libandroid.so",
               RTLD_LOCAL | RTLD_LAZY)) == 0)
      return false;
#else
   if ((libandroid_handle = dlopen("/system/lib/libandroid.so",
               RTLD_LOCAL | RTLD_LAZY)) == 0)
      return false;
#endif

   if ((p_AMotionEvent_getAxisValue = dlsym(RTLD_DEFAULT,
               "AMotionEvent_getAxisValue")))
      engine_handle_dpad            = engine_handle_dpad_getaxisvalue;

   p_AMotionEvent_getButtonState    = dlsym(RTLD_DEFAULT,
               "AMotionEvent_getButtonState");
#endif

   pad_id1 = -1;
   pad_id2 = -1;

   return true;
}

static void *android_input_init(const char *joypad_driver)
{
   int32_t sdk;
   struct android_app *android_app = (struct android_app*)g_android;
   android_input_t *android = (android_input_t*)
      calloc(1, sizeof(*android));

   if (!android)
      return NULL;

   android->mouse_activated = false;
   android->pads_connected = 0;
   android->quick_tap_time = 0;

   input_keymaps_init_keyboard_lut(rarch_key_map_android);

   frontend_android_get_version_sdk(&sdk);

   if (sdk >= 19)
      engine_lookup_name       = android_input_lookup_name;
   else
      engine_lookup_name       = android_input_lookup_name_prekitkat;

   engine_handle_dpad          = engine_handle_dpad_default;

   if (sdk > 10)
      android_input_poll_input = android_input_poll_input_default;
   else
      android_input_poll_input = android_input_poll_input_gingerbread;

   if (!android_input_init_handle())
   {
      RARCH_WARN("[Android] Unable to open libandroid.so\n");
   }

   frontend_android_get_name(android->device_model,
         sizeof(android->device_model));

   android_app->input_alive = true;

   return android;
}

static int android_check_quick_tap(android_input_t *android)
{
   /* Check if the touch screen has been been quick tapped
    * and then not touched again for 200ms
    * If so then return true and deactivate quick tap timer */
   retro_time_t now = cpu_features_get_time_usec();
   if (android->quick_tap_time &&
         (now / 1000 - android->quick_tap_time / 1000000) >= 200)
   {
      android->quick_tap_time = 0;
      return 1;
   }

   return 0;
}

static INLINE void android_mouse_calculate_deltas(android_input_t *android,
      AInputEvent *event,size_t motion_ptr,int source)
{
   unsigned video_width, video_height;
   video_driver_get_size(&video_width, &video_height);

   float x       = 0;
   float x_delta = 0;
   float x_min   = 0;
   float x_max   = (float)video_width;

   float y       = 0;
   float y_delta = 0;
   float y_min   = 0;
   float y_max   = (float)video_height;

   struct video_viewport vp = {0};
   int16_t res_x            = 0;
   int16_t res_y            = 0;
   int16_t res_screen_x     = 0;
   int16_t res_screen_y     = 0;

   /* AINPUT_SOURCE_MOUSE_RELATIVE is available on Oreo (SDK 26) and newer,
    * it passes the relative coordinates in the regular X and Y parts.
    * NOTE: AINPUT_SOURCE_* defines have multiple bits set so do full check */
   if ((source & AINPUT_SOURCE_MOUSE_RELATIVE) == AINPUT_SOURCE_MOUSE_RELATIVE)
   {
      x_delta = AMotionEvent_getX(event, motion_ptr);
      y_delta = AMotionEvent_getY(event, motion_ptr);
   }
   else
   {
      /* This axis is only available on Android Nougat or on
      * Android devices with NVIDIA extensions */
      if (p_AMotionEvent_getAxisValue)
      {
         x_delta = AMotionEvent_getAxisValue(event,AMOTION_EVENT_AXIS_RELATIVE_X,
               motion_ptr);
         y_delta = AMotionEvent_getAxisValue(event,AMOTION_EVENT_AXIS_RELATIVE_Y,
               motion_ptr);
      }

      /* If AXIS_RELATIVE had 0 values it might be because we're not
      * running Android Nougat or on a device
      * with NVIDIA extension, so re-calculate deltas based on
      * AXIS_X and AXIS_Y. This has limitations
      * compared to AXIS_RELATIVE because once the Android mouse cursor
      * hits the edge of the screen it is
      * not possible to move the in-game mouse any further in that direction.
      */
      if (!x_delta && !y_delta)
      {
         x = AMotionEvent_getX(event, motion_ptr);
         y = AMotionEvent_getY(event, motion_ptr);

         x_delta = (x_delta - android->mouse_x_prev);
         y_delta = (y_delta - android->mouse_y_prev);

         android->mouse_x_prev = x;
         android->mouse_y_prev = y;
      }
   }

   android->mouse_x_delta = x_delta;
   android->mouse_y_delta = y_delta;

   if (!x) x = android->mouse_x + android->mouse_x_delta;
   if (!y) y = android->mouse_y + android->mouse_y_delta;

   video_driver_translate_coord_viewport_confined_wrap(&vp,
            (int) x, (int) y,
            &android->mouse_x_viewport, &android->mouse_y_viewport,
            &android->mouse_x_viewport_screen, &android->mouse_y_viewport_screen);

   /* x and y are used for the screen mouse, so we want
    * to avoid values outside of the viewport resolution */
   if (x < x_min) x = x_min;
   else if (x > x_max) x = x_max;
   if (y < y_min) y = y_min;
   else if (y > y_max) y = y_max;

   android->mouse_x = x;
   android->mouse_y = y;
}

static INLINE void android_input_poll_event_type_motion(
      android_input_t *android, AInputEvent *event,
      int port, int source)
{
   int getaction     = AMotionEvent_getAction(event);
   int action        = getaction  & AMOTION_EVENT_ACTION_MASK;
   size_t motion_ptr = getaction >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
   bool keyup        = (
            action == AMOTION_EVENT_ACTION_UP
         || action == AMOTION_EVENT_ACTION_CANCEL
         || action == AMOTION_EVENT_ACTION_POINTER_UP);

   /* If source is mouse then calculate button state
    * and mouse deltas and don't process as touchscreen event.
    * NOTE: AINPUT_SOURCE_* defines have multiple bits set so do full check */
   if (    (source & AINPUT_SOURCE_MOUSE) == AINPUT_SOURCE_MOUSE
        || (source & AINPUT_SOURCE_MOUSE_RELATIVE) == AINPUT_SOURCE_MOUSE_RELATIVE)
   {
      if (!android->mouse_activated)
      {
         RARCH_LOG("[Android Input] Mouse activated.\n");
         android->mouse_activated = true;
      }
      /* getButtonState requires API level 14 */
      if (p_AMotionEvent_getButtonState)
      {
         int btn              = (int)AMotionEvent_getButtonState(event);

         android->mouse_l     = (btn & AMOTION_EVENT_BUTTON_PRIMARY);
         android->mouse_r     = (btn & AMOTION_EVENT_BUTTON_SECONDARY);
         android->mouse_m     = (btn & AMOTION_EVENT_BUTTON_TERTIARY);

         btn                  = (int)AMotionEvent_getAxisValue(event,
               AMOTION_EVENT_AXIS_VSCROLL, motion_ptr);

         if (btn > 0)
            android->mouse_wu = btn;
         else if (btn < 0)
            android->mouse_wd = btn;
      }
      else
      {
         /* If getButtonState is not available
          * then treat all MotionEvent.ACTION_DOWN as left button presses */
         if (action == AMOTION_EVENT_ACTION_DOWN)
            android->mouse_l = 1;
         if (action == AMOTION_EVENT_ACTION_UP)
            android->mouse_l = 0;
      }

      android_mouse_calculate_deltas(android,event,motion_ptr,source);

      return;
   }

   if (keyup && motion_ptr < MAX_TOUCH)
   {
      if (action == AMOTION_EVENT_ACTION_UP && ENABLE_TOUCH_SCREEN_MOUSE)
      {
         /* If touchscreen was pressed for less than 200ms
          * then register time stamp of a quick tap */
         if ((AMotionEvent_getEventTime(event)-AMotionEvent_getDownTime(event))/1000000 < 200)
         {
            /* Prevent the quick tap if a button on the overlay is down */
            input_driver_state_t *input_st = input_state_get_ptr();
            if (!(input_st->flags & INP_FLAG_BLOCK_POINTER_INPUT))
               android->quick_tap_time = AMotionEvent_getEventTime(event);
         }
         android->mouse_l = 0;
      }

      memmove(android->pointer + motion_ptr,
            android->pointer + motion_ptr + 1,
            (MAX_TOUCH - motion_ptr - 1) * sizeof(struct input_pointer));
      if (android->pointer_count > 0)
         android->pointer_count--;
   }
   else
   {
      int      pointer_max     = MIN(
            AMotionEvent_getPointerCount(event), MAX_TOUCH);

      if (action == AMOTION_EVENT_ACTION_DOWN && ENABLE_TOUCH_SCREEN_MOUSE)
      {
         /* When touch screen is pressed, set mouse
          * previous position to current position
          * before starting to calculate mouse movement deltas. */
         android->mouse_x_prev = AMotionEvent_getX(event, motion_ptr);
         android->mouse_y_prev = AMotionEvent_getY(event, motion_ptr);

         /* If another touch happened within 200ms after a quick tap
          * then cancel the quick tap and register left mouse button
          * as being held down */
         if ((AMotionEvent_getEventTime(event) - android->quick_tap_time)/1000000 < 200)
         {
            android->quick_tap_time = 0;
            android->mouse_l        = 1;
         }
      }

      if ((       action == AMOTION_EVENT_ACTION_MOVE
               || action == AMOTION_EVENT_ACTION_HOVER_MOVE)
            && ENABLE_TOUCH_SCREEN_MOUSE)
         android_mouse_calculate_deltas(android,event,motion_ptr,source);

      for (motion_ptr = 0; motion_ptr < pointer_max; motion_ptr++)
      {
         struct video_viewport vp = {0};
         float x = AMotionEvent_getX(event, motion_ptr);
         float y = AMotionEvent_getY(event, motion_ptr);

         /* On other platforms, pointer query uses the confined wrap function, *
          * but some extra functionality is added to Android which needs the   *
          * true offscreen value -0x8000, so both variants are called. */
         video_driver_translate_coord_viewport_confined_wrap(
               &vp,
               x, y,
               &android->pointer[motion_ptr].confined_x,
               &android->pointer[motion_ptr].confined_y,
               &android->pointer[motion_ptr].full_x,
               &android->pointer[motion_ptr].full_y);

         video_driver_translate_coord_viewport_wrap(
               &vp,
               x, y,
               &android->pointer[motion_ptr].x,
               &android->pointer[motion_ptr].y,
               &android->pointer[motion_ptr].full_x,
               &android->pointer[motion_ptr].full_y);

         android->pointer_count = MAX(
               android->pointer_count,
               motion_ptr + 1);
      }
   }

   /* If more than one pointer detected
    * then count it as a mouse right click */
   if (ENABLE_TOUCH_SCREEN_MOUSE)
      android->mouse_r = (android->pointer_count == 2);
}

static bool android_is_keyboard_id(int id)
{
   unsigned i;
   for (i = 0;  i < (unsigned)kbd_num; i++)
      if (id == kbd_id[i])
         return true;

   return false;
}

static INLINE void android_input_poll_event_type_keyboard(
      AInputEvent *event, int keycode, int *handled)
{
   int keydown           = (AKeyEvent_getAction(event)
         == AKEY_EVENT_ACTION_DOWN);
   unsigned keyboardcode = input_keymaps_translate_keysym_to_rk(keycode);
   /* Set keyboard modifier based on shift,ctrl and alt state */
   uint16_t mod          = 0;
   int meta              = AKeyEvent_getMetaState(event);

   if (meta & AMETA_ALT_ON)
      mod |= RETROKMOD_ALT;
   if (meta & AMETA_CTRL_ON)
      mod |= RETROKMOD_CTRL;
   if (meta & AMETA_SHIFT_ON)
      mod |= RETROKMOD_SHIFT;
   if (meta & AMETA_CAPS_LOCK_ON)
      mod |= RETROKMOD_CAPSLOCK;
   if (meta & AMETA_NUM_LOCK_ON)
      mod |= RETROKMOD_NUMLOCK;
   if (meta & AMETA_SCROLL_LOCK_ON)
      mod |= RETROKMOD_SCROLLOCK;
   if (meta & AMETA_META_ON)
      mod |= RETROKMOD_META;

   input_keyboard_event(keydown, keyboardcode,
         keyboardcode, mod, RETRO_DEVICE_KEYBOARD);

   if ((keycode == AKEYCODE_VOLUME_UP || keycode == AKEYCODE_VOLUME_DOWN))
      *handled = 0;
}

static INLINE void android_input_poll_event_type_key(
      struct android_app *android_app,
      AInputEvent *event, int port, int keycode, int source,
      int type_event, int *handled)
{
   uint8_t *buf = android_key_state[port];
   int action   = AKeyEvent_getAction(event);
   int keysym   = keycode;

   /* Handle 'duplicate' inputs that correspond
    * to the same RETROK_* key */
   switch (keycode)
   {
      case AKEYCODE_DPAD_CENTER:
         keysym = AKEYCODE_ENTER;
      default:
         break;
   }
   /* some controllers send both the up and down events at once
    * when the button is released for "special" buttons, like menu buttons
    * work around that by only using down events for meta keys (which get
    * cleared every poll anyway)
    */
   switch (action)
   {
      case AKEY_EVENT_ACTION_UP:
         BIT_CLEAR(buf, keysym);
         break;
      case AKEY_EVENT_ACTION_DOWN:
         BIT_SET(buf, keysym);
         break;
   }

   if ((keycode == AKEYCODE_VOLUME_UP || keycode == AKEYCODE_VOLUME_DOWN))
      *handled = 0;
}

static int android_input_get_id_port(android_input_t *android, int id,
      int source)
{
   unsigned i;
   int ret = -1;
   if (source & (AINPUT_SOURCE_TOUCHSCREEN | AINPUT_SOURCE_MOUSE |
            AINPUT_SOURCE_MOUSE_RELATIVE | AINPUT_SOURCE_TOUCHPAD))
         ret = 0; /* touch overlay is always user 1 */

   for (i = 0; i < android->pads_connected; i++)
   {
      if (android->pad_states[i].id == id)
      {
         ret = i;
         break;
      }
   }

   return ret;
}

/* Returns the index inside android->pad_state */
static int android_input_get_id_index_from_name(android_input_t *android,
      const char *name)
{
   int i;
   for (i = 0; i < android->pads_connected; i++)
   {
      if (string_is_equal(name, android->pad_states[i].name))
         return i;
   }

   return -1;
}

static int android_input_recover_port(android_input_t *android, int id)
{
   char device_name[256] = { 0 };
   int vendorId          = 0;
   int productId         = 0;
   settings_t *settings  = config_get_ptr();

   if (!settings->bools.android_input_disconnect_workaround)
       return -1;
   if (!engine_lookup_name(device_name, &vendorId,
			   &productId, sizeof(device_name), id))
       return -1;
   int ret = android_input_get_id_index_from_name(android, device_name);
   if (ret >= 0)
       android->pad_states[ret].id = id;
   return ret;
}


static bool is_configured_as_physical_keyboard(int vendor_id, int product_id, const char *device_name)
{
    bool is_keyboard;
    bool compare_by_id;
    int keyboard_vendor_id;
    int keyboard_product_id;
    char keyboard_name[256];
    settings_t *settings = config_get_ptr();

    if (sscanf(settings->arrays.input_android_physical_keyboard, "%04x:%04x ", &keyboard_vendor_id, &keyboard_product_id) != 2)
    {
        strlcpy(keyboard_name, settings->arrays.input_android_physical_keyboard, sizeof(keyboard_name));
        is_keyboard   = string_is_equal(device_name, keyboard_name);
        compare_by_id = false;
    }
    else
    {
        is_keyboard   = (vendor_id == keyboard_vendor_id && product_id == keyboard_product_id);
        compare_by_id = true;
    }

    if (is_keyboard)
    {
       int i;
        /*
         * Check that there is not already a similar physical keyboard attached
         * attached to the system
         */
        for (i = 0; i < kbd_num; i++)
        {
            char kbd_device_name[256] = { 0 };
            int kbd_vendor_id         = 0;
            int kbd_product_id        = 0;

            if (!engine_lookup_name(kbd_device_name, &kbd_vendor_id,
                     &kbd_product_id, sizeof(kbd_device_name), kbd_id[i]))
                return false;

            if (compare_by_id && vendor_id == kbd_vendor_id && product_id == kbd_product_id)
                return false;

            if (!compare_by_id && string_is_equal(device_name, kbd_device_name))
                return false;
        }
        return true;
    }
    return false;
}

static void handle_hotplug(android_input_t *android,
      struct android_app *android_app, int *port, int id,
      int source)
{
   char device_name[256];
   char name_buf[256];
   int vendorId                 = 0;
   int productId                = 0;
   const char *device_model     = android->device_model;

   device_name[0] = name_buf[0] = '\0';

   if (!engine_lookup_name(device_name, &vendorId,
            &productId, sizeof(device_name), id))
      return;

   /* FIXME - per-device hacks for NVidia Shield, Xperia Play and
    * similar devices
    *
    * These hacks depend on autoconf, but can work with user
    * created autoconfs properly
    */

   /* NVIDIA Shield Console
    * This is the most complicated example, the built-in controller
    * has an extra button that can't be used and a remote.
    *
    * We map the remote for navigation and overwrite whenever a
    * real controller is connected.
    * Also group the NVIDIA button on the controller with the
    * main controller inputs so it's usable. It's mapped to
    * menu by default
    *
    * The NVIDIA button is identified as "Virtual" device when first
    * pressed. CEC remote input is also identified as "Virtual" device.
    * If a virtual device is detected before a controller then it will
    * be assigned to port 0 as "SHIELD Virtual Controller". When a real
    * controller is detected it will overwrite the virtual controller
    * and be grouped with the NVIDIA button of the virtual device.
    *
    */
   if (strstr(device_model, "SHIELD Android TV") && (
      strstr(device_name, "Virtual") ||
      strstr(device_name, "NVIDIA Corporation NVIDIA Controller v01.0")))
   {
      /* only use the hack if the device is one of the built-in devices */
      RARCH_LOG("[Android] Special device detected: %s.\n", device_model);
      {
         /* Remove the remote or virtual controller device if it is mapped */
         if (   strstr(android->pad_states[0].name, "SHIELD Remote")
             || strstr(android->pad_states[0].name, "SHIELD Virtual Controller"))
         {
            pad_id1 = -1;
            pad_id2 = -1;
            android->pads_connected = 0;
            *port = 0;
            strlcpy(name_buf, device_name, sizeof(name_buf));
         }

         /* if the actual controller has not been mapped yet,
          * then configure Virtual device for now */
         if (strstr(device_name, "Virtual") && android->pads_connected==0)
            strlcpy (name_buf, "SHIELD Virtual Controller", sizeof(name_buf));
         else
            strlcpy (name_buf, "NVIDIA SHIELD Controller", sizeof(name_buf));

         /* apply the hack only for the first controller
          * store the id for later use
         */
         if (strstr(device_name, "NVIDIA Corporation NVIDIA Controller v01.0")
               && android->pads_connected==0)
            pad_id1 = id;
         else if (strstr(device_name, "Virtual") && pad_id1 != -1)
         {
            id = pad_id1;
            return;
         }
      }
   }

   else if (strstr(device_model, "SHIELD") && (
      strstr(device_name, "Virtual") || strstr(device_name, "gpio") ||
      strstr(device_name, "NVIDIA Corporation NVIDIA Controller v01.01") ||
      strstr(device_name, "NVIDIA Corporation NVIDIA Controller v01.02")))
   {
      /* only use the hack if the device is one of the built-in devices */
      RARCH_LOG("[Android] Special device detected: %s.\n", device_model);
      {
         if ( pad_id1 < 0 )
            pad_id1 = id;
         else
            pad_id2 = id;

         if ( pad_id2 > 0)
            return;
         strlcpy (name_buf, "NVIDIA SHIELD Portable", sizeof(name_buf));
      }
   }

   else if (strstr(device_model, "SHIELD") && (
      strstr(device_name, "Virtual") || strstr(device_name, "gpio") ||
      strstr(device_name, "NVIDIA Corporation NVIDIA Controller v01.03")))
   {
      /* only use the hack if the device is one of the built-in devices */
      RARCH_LOG("[Android] Special device detected: %s.\n", device_model);
      {
         if (strstr(device_name, "NVIDIA Corporation NVIDIA Controller v01.03")
             && android->pads_connected==0)
            pad_id1 = id;
         else if (strstr(device_name, "Virtual") || strstr(device_name, "gpio"))
         {
            id = pad_id1;
            return;
         }
         strlcpy (name_buf, "NVIDIA SHIELD Gamepad", sizeof(name_buf));
      }
   }

   /* Other ATV Devices
    * Add other common ATV devices that will follow the Android
    * Gaempad convention as "Android Gamepad"
    */
    /* to-do: add DS4 on Bravia ATV */
   else if (strstr(device_name, "NVIDIA"))
      strlcpy (name_buf, "Android Gamepad", sizeof(name_buf));

   /* GPD XD
    * This is a simple hack, basically groups the "back"
    * button with the rest of the gamepad
    */
   else if (strstr(device_model, "XD") && (
      strstr(device_name, "Virtual") || strstr(device_name, "rk29-keypad") ||
      strstr(device_name,"Playstation3") || strstr(device_name,"XBOX")))
   {
      /* only use the hack if the device is one of the built-in devices */
      RARCH_LOG("[Android] Special device detected: %s.\n", device_model);
      {
         if ( pad_id1 < 0 )
            pad_id1 = id;
         else
            pad_id2 = id;

         if ( pad_id2 > 0)
            return;

         strlcpy (name_buf, "GPD XD", sizeof(name_buf));
         *port = 0;
      }
   }

   /* XPERIA Play
    * This device is composed of two hid devices
    * We make it look like one device
    */
   else if (
            (
               string_starts_with_size(device_model, "R800", STRLEN_CONST("R800")) ||
               strstr(device_model, "Xperia Play") ||
               strstr(device_model, "Play") ||
               strstr(device_model, "SO-01D")
            ) || (
               strstr(device_name, "keypad-game-zeus") ||
               strstr(device_name, "keypad-zeus") ||
               strstr(device_name, "Android Gamepad")
            )
         )
   {
      /* only use the hack if the device is one of the built-in devices */
      RARCH_LOG("[Android] Special device detected: %s.\n", device_model);
      {
         if ( pad_id1 < 0 )
            pad_id1 = id;
         else
            pad_id2 = id;

         if ( pad_id2 > 0)
            return;

         strlcpy (name_buf, "XPERIA Play", sizeof(name_buf));
         *port = 0;
      }
   }

   /* ARCHOS Gamepad
    * This device is composed of two hid devices
    * We make it look like one device
    */
   else if (strstr(device_model, "ARCHOS GAMEPAD") && (
      strstr(device_name, "joy_key") || strstr(device_name, "joystick")))
   {
      /* only use the hack if the device is one of the built-in devices */
      RARCH_LOG("[Android] ARCHOS GAMEPAD Detected: %s.\n", device_model);
      {
         if ( pad_id1 < 0 )
            pad_id1 = id;
         else
            pad_id2 = id;

         if ( pad_id2 > 0)
            return;

         strlcpy (name_buf, "ARCHOS GamePad", sizeof(name_buf));
         *port = 0;
      }
   }

   /* Amazon Fire TV & Fire stick */
   else if (
             string_starts_with_size(device_model, "AFT", STRLEN_CONST("AFT")) &&
             (
              strstr(device_model, "AFTB") ||
              strstr(device_model, "AFTT") ||
              strstr(device_model, "AFTS") ||
              strstr(device_model, "AFTM") ||
              strstr(device_model, "AFTRS")
             )
         )
   {
      RARCH_LOG("[Android] Special device detected: %s\n", device_model);
      {
         /* always map remote to port #0 */
         if (strstr(device_name, "Amazon Fire TV Remote"))
         {
            android->pads_connected = 0;
            *port = 0;
            strlcpy(name_buf, device_name, sizeof(name_buf));
         }
         /* remove the remote when a gamepad enters */
         else if (strstr(android->pad_states[0].name,"Amazon Fire TV Remote"))
         {
            android->pads_connected = 0;
            *port = 0;
            strlcpy(name_buf, device_name, sizeof(name_buf));
         }
         else
            strlcpy(name_buf, device_name, sizeof(name_buf));
      }
   }

   /* Other uncommon devices
    * These are mostly remote control type devices, bind them always to port 0
    * And overwrite the binding whenever a controller button is pressed
    */
   else if (strstr(device_name, "Amazon Fire TV Remote")
         || strstr(device_name, "Nexus Remote")
         || strstr(device_name, "SHIELD Remote"))
   {
      android->pads_connected = 0;
      *port = 0;
      strlcpy(name_buf, device_name, sizeof(name_buf));
   }

   else if (strstr(device_name, "iControlPad-"))
      strlcpy(name_buf, "iControlPad HID Joystick profile", sizeof(name_buf));

   else if (strstr(device_name, "TTT THT Arcade console 2P USB Play"))
   {
      if (*port == 0)
         strlcpy(name_buf, "TTT THT Arcade (User 1)", sizeof(name_buf));
      else if (*port == 1)
         strlcpy(name_buf, "TTT THT Arcade (User 2)", sizeof(name_buf));
   }
   else if (strstr(device_name, "MOGA"))
      strlcpy(name_buf, "Moga IME", sizeof(name_buf));

   /* If device is keyboard only and didn't match any of the devices above
    * then assume it is a keyboard, register the id, and return unless the
    * maximum number of keyboards are already registered. */
   else if (source == AINPUT_SOURCE_KEYBOARD && kbd_num < MAX_NUM_KEYBOARDS)
   {
      kbd_id[kbd_num] = id;
      kbd_num++;
      return;
   }

   /* If the device is a keyboard, didn't match any of the devices above
    * and is designated as the physical keyboard, then assume it is a keyboard,
    * register the id, and return unless the
    * maximum number of keyboards are already registered. */
   else if ((source & AINPUT_SOURCE_KEYBOARD) && kbd_num < MAX_NUM_KEYBOARDS &&
            is_configured_as_physical_keyboard(vendorId, productId, device_name))
   {
       kbd_id[kbd_num] = id;
       kbd_num++;
       return;
   }

   /* if device was not keyboard only, yet did not match any of the devices
    * then try to autoconfigure as gamepad based on device_name. */
   else if (!string_is_empty(device_name))
      strlcpy(name_buf, device_name, sizeof(name_buf));

   if (strstr(android_app->current_ime, "net.obsidianx.android.mogaime"))
      strlcpy(name_buf, android_app->current_ime, sizeof(name_buf));
   else if (strstr(android_app->current_ime, "com.ccpcreations.android.WiiUseAndroid"))
      strlcpy(name_buf, android_app->current_ime, sizeof(name_buf));
   else if (strstr(android_app->current_ime, "com.hexad.bluezime"))
      strlcpy(name_buf, android_app->current_ime, sizeof(name_buf));

   if (*port < 0)
      *port = android->pads_connected;

   input_autoconfigure_connect(
         name_buf,
         NULL, NULL,
         android_joypad.ident,
         *port,
         vendorId,
         productId);

   android->pad_states[android->pads_connected].id   =
      g_android->id[android->pads_connected]         = id;
   android->pad_states[android->pads_connected].port = *port;

   strlcpy(android->pad_states[*port].name, name_buf,
         sizeof(android->pad_states[*port].name));

   android->pads_connected++;
}

static int android_input_get_id(AInputEvent *event)
{
   int id = AInputEvent_getDeviceId(event);
   if (id == pad_id2)
      return pad_id1;
   return id;
}

struct TOUCHSTATE
{
   int down;
   int x;
   int y;
};

static void engine_handle_touchpad(
      struct android_app *android, AInputEvent *event, int port)
{
   unsigned n;
   static struct TOUCHSTATE touchstate[64];
   int pointer_count	= AMotionEvent_getPointerCount(event);

   for(n = 0; n < pointer_count; ++n)
   {
      int pointer_id	=   AMotionEvent_getPointerId(event, n);
      int action     =   AMOTION_EVENT_ACTION_MASK
                       & AMotionEvent_getAction(event);
      int raw_action	=   AMotionEvent_getAction(event);
      if (     action  == AMOTION_EVENT_ACTION_POINTER_DOWN
            || action  == AMOTION_EVENT_ACTION_POINTER_UP )
      {
         int pointer_index = (AMotionEvent_getAction( event ) & AMOTION_EVENT_ACTION_POINTER_INDEX_MASK) >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
         pointer_id        = AMotionEvent_getPointerId( event, pointer_index);
      }

      if (     action  == AMOTION_EVENT_ACTION_DOWN
            || action  == AMOTION_EVENT_ACTION_POINTER_DOWN )
         touchstate[pointer_id].down = 1;
      else if (action  == AMOTION_EVENT_ACTION_UP
            || action  == AMOTION_EVENT_ACTION_POINTER_UP
            || action  == AMOTION_EVENT_ACTION_CANCEL )
         touchstate[pointer_id].down = 0;

      if (touchstate[pointer_id].down)
      {
         int x = touchstate[pointer_id].x  = AMotionEvent_getX(event, n);
         int y = touchstate[pointer_id].y  = AMotionEvent_getY(event, n);
         if (x < 360)
         {
            android->analog_state[port][0] =
               (int16_t)((x / 180.0 - 1.0f) * 32767.0f);
            android->analog_state[port][1] =
               (int16_t)((y / 180.0 - 1.0f) * 32767.0f);
         }
         else if (x >= 606)
         {
            x -= 606;
            android->analog_state[port][2] =
               (int16_t)((x / 180.0 - 1.0f) * 32767.0f);
            android->analog_state[port][3] =
               (int16_t)((y / 180.0 - 1.0f) * 32767.0f);
         }
      }
      else
      {
         if (touchstate[pointer_id].x < 360)
         {
            android->analog_state[port][0] = 0.0f;
            android->analog_state[port][1] = 0.0f;
         }
         else if (touchstate[pointer_id].x >= 606)
         {
            android->analog_state[port][2] = 0.0f;
            android->analog_state[port][3] = 0.0f;
         }
      }
   }
}

static void android_input_poll_input_gingerbread(
      android_input_t *android)
{
   AInputEvent              *event = NULL;
   struct android_app *android_app = (struct android_app*)g_android;

   /* Read all pending events. */
   if (AInputQueue_getEvent(android_app->inputQueue, &event) >= 0)
   {
      int source, type_event, id, port;
      int32_t   handled = 0;
      if (AInputQueue_preDispatchEvent(android_app->inputQueue, event))
         return;
      source            = AInputEvent_getSource(event);
      type_event        = AInputEvent_getType(event);
      id                = android_input_get_id(event);
      port              = android_input_get_id_port(android, id, source);

      if (port < 0 && !android_is_keyboard_id(id))
         port = android_input_recover_port(android, id);

      if (port < 0 && !android_is_keyboard_id(id))
         handle_hotplug(android, android_app,
         &port, id, source);

      switch (type_event)
      {
         case AINPUT_EVENT_TYPE_MOTION:
            if ((source & AINPUT_SOURCE_TOUCHPAD))
               engine_handle_touchpad(android_app, event, port);
            /* Only handle events from a touchscreen or mouse */
            else if ((source & (AINPUT_SOURCE_TOUCHSCREEN
                        | AINPUT_SOURCE_STYLUS | AINPUT_SOURCE_MOUSE)))
               android_input_poll_event_type_motion(android, event,
                     port, source);
            else
               engine_handle_dpad(android_app, event, port, source);
            handled = 1;
            break;
         case AINPUT_EVENT_TYPE_KEY:
            {
               int keycode = AKeyEvent_getKeyCode(event);

               if (!keycode)
                  break;

               if (android_is_keyboard_id(id))
               {
                  android_input_poll_event_type_keyboard(
                        event, keycode, &handled);
                  android_input_poll_event_type_key(
                        android_app, event, ANDROID_KEYBOARD_PORT,
                        keycode, source, type_event, &handled);
               }
               else
                  android_input_poll_event_type_key(android_app,
                     event, port, keycode, source, type_event, &handled);
            }
            break;
      }

      AInputQueue_finishEvent(android_app->inputQueue, event, handled);
   }
}

static void android_input_poll_input_default(android_input_t *android)
{
   AInputEvent              *event = NULL;
   struct android_app *android_app = (struct android_app*)g_android;

   /* Read all pending events. */
   while (AInputQueue_hasEvents(android_app->inputQueue))
   {
      while (AInputQueue_getEvent(android_app->inputQueue, &event) >= 0)
      {
         int32_t   handled = 1;
         int predispatched = AInputQueue_preDispatchEvent(
               android_app->inputQueue, event);
         int        source = AInputEvent_getSource(event);
         int    type_event = AInputEvent_getType(event);
         int            id = android_input_get_id(event);
         int          port = android_input_get_id_port(android, id, source);

         if (port < 0 && !android_is_keyboard_id(id))
            port = android_input_recover_port(android, id);

         if (port < 0 && !android_is_keyboard_id(id))
            handle_hotplug(android, android_app,
                  &port, id, source);

         switch (type_event)
         {
            case AINPUT_EVENT_TYPE_MOTION:
               if ((source & AINPUT_SOURCE_TOUCHPAD))
                  engine_handle_touchpad(android_app, event, port);
               /* Only handle events from a touchscreen or mouse */
               else if ((source & (AINPUT_SOURCE_TOUCHSCREEN
                           | AINPUT_SOURCE_MOUSE_RELATIVE
                           | AINPUT_SOURCE_STYLUS | AINPUT_SOURCE_MOUSE)))
                  android_input_poll_event_type_motion(android, event,
                        port, source);
               else
                  engine_handle_dpad(android_app, event, port, source);
               break;
            case AINPUT_EVENT_TYPE_KEY:
               {
                  int keycode = AKeyEvent_getKeyCode(event);

                  if (!keycode)
                     break;

                  if (android_is_keyboard_id(id))
                  {
                     if (!predispatched)
                     {
                        android_input_poll_event_type_keyboard(
                              event, keycode, &handled);
                        android_input_poll_event_type_key(
                              android_app, event, ANDROID_KEYBOARD_PORT,
                              keycode, source, type_event, &handled);
                     }
                  }
                  else
                     android_input_poll_event_type_key(android_app,
                           event, port, keycode, source, type_event, &handled);
               }
               break;
         }

         if (!predispatched)
            AInputQueue_finishEvent(android_app->inputQueue, event,
                  handled);
      }
   }
}

static void android_input_poll_user(android_input_t *android)
{
   struct android_app *android_app = (struct android_app*)g_android;
   bool poll_accelerometer         = false;
   bool poll_gyroscope             = false;

   if (!android_app->sensorEventQueue)
      return;

   poll_accelerometer = (android_app->sensor_state_mask &
         (UINT64_C(1) << RETRO_SENSOR_ACCELEROMETER_ENABLE)) &&
               android_app->accelerometerSensor;

   poll_gyroscope     = (android_app->sensor_state_mask &
         (UINT64_C(1) << RETRO_SENSOR_GYROSCOPE_ENABLE)) &&
               android_app->gyroscopeSensor;

   if (poll_accelerometer || poll_gyroscope)
   {
      ASensorEvent event;
      while (ASensorEventQueue_getEvents(
            android_app->sensorEventQueue, &event, 1) > 0)
      {
         switch (event.type)
         {
            case ASENSOR_TYPE_ACCELEROMETER:
               android->accelerometer_state.x = event.acceleration.x;
               android->accelerometer_state.y = event.acceleration.y;
               android->accelerometer_state.z = event.acceleration.z;
               break;
            case ASENSOR_TYPE_GYROSCOPE:
               /* ASensorEvent struct is mysterious - have to
                * read the raw 'data' field to get rate of
                * rotation... */
               android->gyroscope_state.x = event.data[0];
               android->gyroscope_state.y = event.data[1];
               android->gyroscope_state.z = event.data[2];
               break;
            default:
               break;
         }
      }
   }
}

/* Handle all events.
 */
static void android_input_poll(void *data)
{
   int ident;
   struct android_app *android_app = (struct android_app*)g_android;
   android_input_t *android        = (android_input_t*)data;
   settings_t            *settings = config_get_ptr();

   while ((ident =
            ALooper_pollAll(settings->uints.input_block_timeout,
               NULL, NULL, NULL)) >= 0)
   {
      switch (ident)
      {
         case LOOPER_ID_INPUT:
            android_input_poll_input(android);
            break;
         case LOOPER_ID_USER:
            android_input_poll_user(android);
            break;
         case LOOPER_ID_MAIN:
            android_input_poll_main_cmd();
            break;
      }

      if (android_app->destroyRequested != 0)
      {
         retroarch_ctl(RARCH_CTL_SET_SHUTDOWN, NULL);
         return;
      }

      if (android_app->reinitRequested != 0)
      {
         uint32_t runloop_flags = runloop_get_flags();
         if (runloop_flags & RUNLOOP_FLAG_PAUSED)
            command_event(CMD_EVENT_REINIT, NULL);
         android_app_write_cmd(android_app, APP_CMD_REINIT_DONE);
         return;
      }
   }
}

bool android_run_events(void *data)
{
   struct android_app *android_app = (struct android_app*)g_android;

   if (ALooper_pollOnce(-1, NULL, NULL, NULL) == LOOPER_ID_MAIN)
      android_input_poll_main_cmd();

   /* Check if we are exiting. */
   if (android_app->destroyRequested != 0)
   {
      retroarch_ctl(RARCH_CTL_SET_SHUTDOWN, NULL);
      return false;
   }

   if (android_app->reinitRequested != 0)
   {
      uint32_t runloop_flags = runloop_get_flags();
      if (runloop_flags & RUNLOOP_FLAG_PAUSED)
         command_event(CMD_EVENT_REINIT, NULL);
      android_app_write_cmd(android_app, APP_CMD_REINIT_DONE);
   }

   return true;
}

static int16_t android_input_state(
      void *data,
      const input_device_driver_t *joypad,
      const input_device_driver_t *sec_joypad,
      rarch_joypad_info_t *joypad_info,
      const retro_keybind_set *binds,
      bool keyboard_mapping_blocked,
      unsigned port,
      unsigned device,
      unsigned idx,
      unsigned id)
{
   android_input_t *android           = (android_input_t*)data;

   switch (device)
   {
      case RETRO_DEVICE_JOYPAD:
         if (id == RETRO_DEVICE_ID_JOYPAD_MASK)
         {
            unsigned i;
            int16_t ret = 0;

            if (!keyboard_mapping_blocked)
            {
               for (i = 0; i < RARCH_FIRST_CUSTOM_BIND; i++)
               {
                  if (binds[port][i].valid)
                  {
                     if (     (binds[port][i].key && binds[port][i].key < RETROK_LAST)
                           && ANDROID_KEYBOARD_PORT_INPUT_PRESSED(binds[port], i))
                        ret |= (1 << i);
                  }
               }
            }

            return ret;
         }

         if (id < RARCH_BIND_LIST_END)
         {
            if (binds[port][id].valid)
            {
               if (     (binds[port][id].key && binds[port][id].key < RETROK_LAST)
                     && ANDROID_KEYBOARD_PORT_INPUT_PRESSED(binds[port], id)
                     && (id == RARCH_GAME_FOCUS_TOGGLE || !keyboard_mapping_blocked)
                     )
                  return 1;
            }
         }
         break;
      case RETRO_DEVICE_ANALOG:
         break;
      case RETRO_DEVICE_KEYBOARD:
         return (id && id < RETROK_LAST) && BIT_GET(android_key_state[ANDROID_KEYBOARD_PORT], rarch_keysym_lut[id]);
      case RETRO_DEVICE_MOUSE:
      case RARCH_DEVICE_MOUSE_SCREEN:
         {
            /* Same mouse state is reported for all ports. */
            int val = 0;
            switch (id)
            {
               case RETRO_DEVICE_ID_MOUSE_LEFT:
                  return android->mouse_l || android_check_quick_tap(android);
               case RETRO_DEVICE_ID_MOUSE_RIGHT:
                  return android->mouse_r;
               case RETRO_DEVICE_ID_MOUSE_MIDDLE:
                  return android->mouse_m;
               case RETRO_DEVICE_ID_MOUSE_X:
                  if (device == RARCH_DEVICE_MOUSE_SCREEN)
                     return android->mouse_x_viewport_screen;

                  val = android->mouse_x_delta;
                  android->mouse_x_delta = 0;
                  /* flush delta after it has been read */
                  return val;
               case RETRO_DEVICE_ID_MOUSE_Y:
                  if (device == RARCH_DEVICE_MOUSE_SCREEN)
                     return android->mouse_y_viewport_screen;

                  val = android->mouse_y_delta;
                  android->mouse_y_delta = 0;
                  /* flush delta after it has been read */
                  return val;
               case RETRO_DEVICE_ID_MOUSE_WHEELUP:
                  val = android->mouse_wu;
                  android->mouse_wu = 0;
                  return val;
               case RETRO_DEVICE_ID_MOUSE_WHEELDOWN:
                  val = android->mouse_wd;
                  android->mouse_wd = 0;
                  return val;
            }
         }
         break;
      case RETRO_DEVICE_LIGHTGUN:
         {
            /* Same lightgun state is reported for all ports. */
            int val = 0;
            switch (id)
            {
               /* Favor mouse for lightgun control. */
               case RETRO_DEVICE_ID_LIGHTGUN_SCREEN_X:
                  if (android->mouse_activated)
                     return android->mouse_x_viewport_screen;
                  else
                     return android->pointer[idx].x;
               case RETRO_DEVICE_ID_LIGHTGUN_SCREEN_Y:
                  if (android->mouse_activated)
                     return android->mouse_y_viewport_screen;
                  else
                     return android->pointer[idx].y;
               /* Deprecated relative lightgun. */
               case RETRO_DEVICE_ID_LIGHTGUN_X:
                  val                    = android->mouse_x_delta;
                  android->mouse_x_delta = 0;
                  /* flush delta after it has been read */
                  return val;
               case RETRO_DEVICE_ID_LIGHTGUN_Y:
                  val                    = android->mouse_y_delta;
                  android->mouse_y_delta = 0;
                  /* flush delta after it has been read */
                  return val;
               case RETRO_DEVICE_ID_LIGHTGUN_CURSOR:
               case RETRO_DEVICE_ID_LIGHTGUN_RELOAD:
                  return android->mouse_m || android->pointer_count == 3;
               case RETRO_DEVICE_ID_LIGHTGUN_SELECT:
                  return android->mouse_r && android->mouse_l;
               case RETRO_DEVICE_ID_LIGHTGUN_START:
               case RETRO_DEVICE_ID_LIGHTGUN_TURBO:
                  return android->mouse_r || android->pointer_count == 2;
               case RETRO_DEVICE_ID_LIGHTGUN_TRIGGER:
                  return android->mouse_l || android_check_quick_tap(android) || android->pointer_count == 1;
               case RETRO_DEVICE_ID_LIGHTGUN_IS_OFFSCREEN:
                  return input_driver_pointer_is_offscreen(android->pointer[idx].x, android->pointer[idx].y);
            }
         }
         break;
      case RETRO_DEVICE_POINTER:
      case RARCH_DEVICE_POINTER_SCREEN:
         /* Same pointer state is reported for all ports. */
         switch (id)
         {
            case RETRO_DEVICE_ID_POINTER_X:
               if (device == RARCH_DEVICE_POINTER_SCREEN)
                  return android->pointer[idx].full_x;
               return android->pointer[idx].confined_x;
            case RETRO_DEVICE_ID_POINTER_Y:
               if (device == RARCH_DEVICE_POINTER_SCREEN)
                  return android->pointer[idx].full_y;
               return android->pointer[idx].confined_y;
            case RETRO_DEVICE_ID_POINTER_PRESSED:
               /* On mobile platforms, touches outside screen / core viewport are not reported. */
               if (device == RARCH_DEVICE_POINTER_SCREEN)
                  return (idx < android->pointer_count) &&
                     (android->pointer[idx].full_x != -0x8000) &&
                     (android->pointer[idx].full_y != -0x8000);
               return (idx < android->pointer_count) &&
                  (android->pointer[idx].x != -0x8000) &&
                  (android->pointer[idx].y != -0x8000);
            case RETRO_DEVICE_ID_POINTER_IS_OFFSCREEN:
               return input_driver_pointer_is_offscreen(android->pointer[idx].x, android->pointer[idx].y);
            case RETRO_DEVICE_ID_POINTER_COUNT:
               return android->pointer_count;
            case RARCH_DEVICE_ID_POINTER_BACK:
            {
               const struct retro_keybind *keyptr =
                  &input_autoconf_binds[0][RARCH_MENU_TOGGLE];
               if (keyptr->joykey == 0)
                  return ANDROID_KEYBOARD_INPUT_PRESSED(AKEYCODE_BACK);
            }
         }
         break;
   }

   return 0;
}

static void android_input_free_input(void *data)
{
   android_input_t *android = (android_input_t*)data;
   struct android_app *android_app = (struct android_app*)g_android;
   if (!android)
      return;

   if (android_app->sensorManager &&
       android_app->sensorEventQueue)
      ASensorManager_destroyEventQueue(android_app->sensorManager,
            android_app->sensorEventQueue);

   android_app->sensorEventQueue    = NULL;
   android_app->accelerometerSensor = NULL;
   android_app->gyroscopeSensor     = NULL;
   android_app->sensorManager       = NULL;

   android_app->input_alive         = false;

#ifdef HAVE_DYLIB
   dylib_close((dylib_t)libandroid_handle);
   libandroid_handle = NULL;
#endif

   android_keyboard_free();
   free(data);
}

static uint64_t android_input_get_capabilities(void *data)
{
   return
        (1 << RETRO_DEVICE_JOYPAD)
      | (1 << RETRO_DEVICE_POINTER)
      | (1 << RETRO_DEVICE_MOUSE)
      | (1 << RETRO_DEVICE_KEYBOARD)
      | (1 << RETRO_DEVICE_LIGHTGUN)
      | (1 << RETRO_DEVICE_ANALOG);
}

static void android_input_enable_sensor_manager(struct android_app *android_app)
{
   if (!android_app->sensorManager)
      android_app->sensorManager = ASensorManager_getInstance();

   if (android_app->sensorManager)
   {
      if (!android_app->accelerometerSensor)
         android_app->accelerometerSensor =
            ASensorManager_getDefaultSensor(android_app->sensorManager,
               ASENSOR_TYPE_ACCELEROMETER);

      if (!android_app->gyroscopeSensor)
         android_app->gyroscopeSensor =
            ASensorManager_getDefaultSensor(android_app->sensorManager,
               ASENSOR_TYPE_GYROSCOPE);

      if (!android_app->sensorEventQueue)
         android_app->sensorEventQueue =
            ASensorManager_createEventQueue(android_app->sensorManager,
               android_app->looper, LOOPER_ID_USER, NULL, NULL);
   }
}

static bool android_input_set_sensor_state(void *data, unsigned port,
      enum retro_sensor_action action, unsigned event_rate)
{
   if (port <= 0)
   {
      struct android_app *android_app = (struct android_app*)g_android;
      android_input_t *android        = (android_input_t*)data;

      if (event_rate == 0)
         event_rate = DEFAULT_ASENSOR_EVENT_RATE;

      switch (action)
      {
         case RETRO_SENSOR_ACCELEROMETER_ENABLE:
            if (!android_app->accelerometerSensor)
               android_input_enable_sensor_manager(android_app);

            if (android_app->sensorEventQueue &&
                  android_app->accelerometerSensor)
            {
               ASensorEventQueue_enableSensor(android_app->sensorEventQueue,
                     android_app->accelerometerSensor);

               /* Events per second (in microseconds). */
               ASensorEventQueue_setEventRate(android_app->sensorEventQueue,
                     android_app->accelerometerSensor, (1000L / event_rate)
                     * 1000);
            }

            android_app->accelerometer_event_rate = event_rate;

            BIT64_CLEAR(android_app->sensor_state_mask, RETRO_SENSOR_ACCELEROMETER_DISABLE);
            BIT64_SET(android_app->sensor_state_mask, RETRO_SENSOR_ACCELEROMETER_ENABLE);
            return true;

         case RETRO_SENSOR_ACCELEROMETER_DISABLE:
            if (android_app->sensorEventQueue &&
                  android_app->accelerometerSensor)
               ASensorEventQueue_disableSensor(android_app->sensorEventQueue,
                     android_app->accelerometerSensor);

            android->accelerometer_state.x = 0.0f;
            android->accelerometer_state.y = 0.0f;
            android->accelerometer_state.z = 0.0f;

            BIT64_CLEAR(android_app->sensor_state_mask, RETRO_SENSOR_ACCELEROMETER_ENABLE);
            BIT64_SET(android_app->sensor_state_mask, RETRO_SENSOR_ACCELEROMETER_DISABLE);
            return true;

         case RETRO_SENSOR_GYROSCOPE_ENABLE:
            if (!android_app->gyroscopeSensor)
               android_input_enable_sensor_manager(android_app);

            if (android_app->sensorEventQueue &&
                  android_app->gyroscopeSensor)
            {
               ASensorEventQueue_enableSensor(android_app->sensorEventQueue,
                     android_app->gyroscopeSensor);

               /* Events per second (in microseconds). */
               ASensorEventQueue_setEventRate(android_app->sensorEventQueue,
                     android_app->gyroscopeSensor, (1000L / event_rate)
                     * 1000);
            }

            android_app->gyroscope_event_rate = event_rate;

            BIT64_CLEAR(android_app->sensor_state_mask, RETRO_SENSOR_GYROSCOPE_DISABLE);
            BIT64_SET(android_app->sensor_state_mask, RETRO_SENSOR_GYROSCOPE_ENABLE);
            return true;

         case RETRO_SENSOR_GYROSCOPE_DISABLE:
            if (android_app->sensorEventQueue &&
                  android_app->gyroscopeSensor)
               ASensorEventQueue_disableSensor(android_app->sensorEventQueue,
                     android_app->gyroscopeSensor);

            android->gyroscope_state.x = 0.0f;
            android->gyroscope_state.y = 0.0f;
            android->gyroscope_state.z = 0.0f;

            BIT64_CLEAR(android_app->sensor_state_mask, RETRO_SENSOR_GYROSCOPE_ENABLE);
            BIT64_SET(android_app->sensor_state_mask, RETRO_SENSOR_GYROSCOPE_DISABLE);
            return true;

         default:
            break;
      }
   }

   return false;
}

static float android_input_get_sensor_input(void *data,
      unsigned port, unsigned id)
{
   if (port <= 0)
   {
      android_input_t      *android      = (android_input_t*)data;

      switch (id)
      {
         case RETRO_SENSOR_ACCELEROMETER_X:
            return android->accelerometer_state.x;
         case RETRO_SENSOR_ACCELEROMETER_Y:
            return android->accelerometer_state.y;
         case RETRO_SENSOR_ACCELEROMETER_Z:
            return android->accelerometer_state.z;
         case RETRO_SENSOR_GYROSCOPE_X:
            return android->gyroscope_state.x;
         case RETRO_SENSOR_GYROSCOPE_Y:
            return android->gyroscope_state.y;
         case RETRO_SENSOR_GYROSCOPE_Z:
            return android->gyroscope_state.z;
      }
   }

   return 0.0f;
}

static void android_input_grab_mouse(void *data, bool state)
{
   JNIEnv *env = jni_thread_getenv();

   if (!env || !g_android)
      return;

   if (g_android->inputGrabMouse)
      CALL_VOID_METHOD_PARAM(env, g_android->activity->clazz,
            g_android->inputGrabMouse, state);
}

static void android_input_keypress_vibrate()
{
   static const int keyboard_press = 3;
   JNIEnv *env = (JNIEnv*)jni_thread_getenv();

   if (!env)
      return;

   CALL_VOID_METHOD_PARAM(env, g_android->activity->clazz,
         g_android->doHapticFeedback, (jint)keyboard_press);
}

input_driver_t input_android = {
   android_input_init,
   android_input_poll,
   android_input_state,
   android_input_free_input,
   android_input_set_sensor_state,
   android_input_get_sensor_input,
   android_input_get_capabilities,
   "android",
   android_input_grab_mouse,
   NULL,
   android_input_keypress_vibrate
};