// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stddef.h>

#include "base/macros.h"
#include "device/gamepad/gamepad_standard_mappings.h"

namespace device {

namespace {

enum SwitchProButtons {
  SWITCH_PRO_BUTTON_CAPTURE = BUTTON_INDEX_COUNT,
  SWITCH_PRO_BUTTON_COUNT
};

// The Switch Pro controller reports a larger logical range than the analog
// axes are capable of, and as a result the received axis values only use about
// 70% of the total range. We renormalize the axis values to cover the full
// range. The axis extents were determined experimentally.
const static float kSwitchProAxisXMin = -0.7f;
const static float kSwitchProAxisXMax = 0.7f;
const static float kSwitchProAxisYMin = -0.65f;
const static float kSwitchProAxisYMax = 0.75f;

void MapperXInputStyleGamepad(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[2]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[10];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[8];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[4];
  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperXboxOneS(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[2]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[10];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[4];
  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperXboxOneS2016Firmware(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;

  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[16];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[13];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[14];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[15];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[3];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperLakeviewResearch(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[4]);
  mapped->buttons_length = BUTTON_INDEX_COUNT - 1;  // no Meta on this device
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperDualshock3SixAxis(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[14];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[13];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[15];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[12];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[10];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[12]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[13]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisToButton(input.axes[8]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisToButton(input.axes[10]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] = AxisToButton(input.axes[9]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[16];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperDualshock3SixAxisNew(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[2]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[12];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = input.buttons[13];
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = input.buttons[14];
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = input.buttons[15];
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] = input.buttons[16];
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[10];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[4];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperDualshock4(const Gamepad& input, Gamepad* mapped) {
  enum Dualshock4Buttons {
    DUALSHOCK_BUTTON_TOUCHPAD = BUTTON_INDEX_COUNT,
    DUALSHOCK_BUTTON_COUNT
  };

  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[3]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[10];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[12];
  mapped->buttons[DUALSHOCK_BUTTON_TOUCHPAD] = input.buttons[13];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[5];

  mapped->buttons_length = DUALSHOCK_BUTTON_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperDualshock4New(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[2]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[12];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[10];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[4];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperIBuffalo(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[1]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[1]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[0]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[0]);
  mapped->buttons_length = BUTTON_INDEX_COUNT - 1; /* no meta */
  mapped->axes_length = 2;
}

void MapperXGEAR(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[4]);
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[2];
  mapped->buttons_length = BUTTON_INDEX_COUNT - 1;  // no Meta on this device
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperDragonRiseGeneric(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[5]);
  mapped->axes[AXIS_INDEX_LEFT_STICK_X] = input.axes[0];
  mapped->axes[AXIS_INDEX_LEFT_STICK_Y] = input.axes[1];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[4];
  mapped->buttons_length = BUTTON_INDEX_COUNT - 1;  // no Meta on this device
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperOnLiveWireless(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[2]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[10];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[8];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[4];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperADT1(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = NullButton();
  mapped->buttons[BUTTON_INDEX_START] = NullButton();
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[6];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperNvShield(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = NullButton();
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[6];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperNvShield2017(const Gamepad& input, Gamepad* mapped) {
  enum Shield2017Buttons {
    SHIELD2017_BUTTON_PLAYPAUSE = BUTTON_INDEX_COUNT,
    SHIELD2017_BUTTON_COUNT
  };
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[14];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[13];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[12];
  mapped->buttons[SHIELD2017_BUTTON_PLAYPAUSE] = input.buttons[6];

  mapped->buttons_length = SHIELD2017_BUTTON_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperOUYA(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[5];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[2]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = NullButton();
  mapped->buttons[BUTTON_INDEX_START] = NullButton();
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = input.buttons[10];
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[15];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[3];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[4];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperRazerServal(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[9];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[10];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);

  mapped->buttons_length = BUTTON_INDEX_COUNT - 1; /* no meta */
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperMoga(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = AxisToButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = AxisToButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = NullButton();
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = input.buttons[8];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[7]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[6]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[6]);

  mapped->buttons_length = BUTTON_INDEX_COUNT - 1; /* no meta */
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperSamsung_EI_GP20(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = NullButton();
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = NullButton();
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[10];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = NullButton();
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = NullButton();

  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[15];

  mapped->axes[AXIS_INDEX_LEFT_STICK_X] = input.axes[0];
  mapped->axes[AXIS_INDEX_LEFT_STICK_Y] = input.axes[1];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = input.axes[2];
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = input.axes[3];

  mapped->buttons_length = BUTTON_INDEX_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperSteelSeries(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[3];
  mapped->buttons[BUTTON_INDEX_QUATERNARY] = input.buttons[4];
  mapped->buttons[BUTTON_INDEX_LEFT_SHOULDER] = input.buttons[6];
  mapped->buttons[BUTTON_INDEX_RIGHT_SHOULDER] = input.buttons[7];
  mapped->buttons[BUTTON_INDEX_LEFT_TRIGGER] = NullButton();
  mapped->buttons[BUTTON_INDEX_RIGHT_TRIGGER] = NullButton();
  mapped->buttons[BUTTON_INDEX_BACK_SELECT] = input.buttons[12];
  mapped->buttons[BUTTON_INDEX_START] = input.buttons[11];
  mapped->buttons[BUTTON_INDEX_LEFT_THUMBSTICK] = NullButton();
  mapped->buttons[BUTTON_INDEX_RIGHT_THUMBSTICK] = NullButton();
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_META] = NullButton();
  mapped->buttons_length = BUTTON_INDEX_META;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperSwitchProUsb(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->axes[AXIS_INDEX_LEFT_STICK_X] = RenormalizeAndClampAxis(
      input.axes[0], kSwitchProAxisXMin, kSwitchProAxisXMax);
  mapped->axes[AXIS_INDEX_LEFT_STICK_Y] = RenormalizeAndClampAxis(
      input.axes[1], kSwitchProAxisYMin, kSwitchProAxisYMax);
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = RenormalizeAndClampAxis(
      input.axes[2], kSwitchProAxisXMin, kSwitchProAxisXMax);
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = RenormalizeAndClampAxis(
      input.axes[3], kSwitchProAxisYMin, kSwitchProAxisYMax);

  mapped->buttons_length = SWITCH_PRO_BUTTON_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperSwitchProBluetooth(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_META] = input.buttons[12];
  mapped->buttons[SWITCH_PRO_BUTTON_CAPTURE] = input.buttons[13];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[4]);
  mapped->axes[AXIS_INDEX_LEFT_STICK_X] = RenormalizeAndClampAxis(
      input.axes[0], kSwitchProAxisXMin, kSwitchProAxisXMax);
  mapped->axes[AXIS_INDEX_LEFT_STICK_Y] = RenormalizeAndClampAxis(
      input.axes[1], kSwitchProAxisYMin, kSwitchProAxisYMax);
  mapped->axes[AXIS_INDEX_RIGHT_STICK_X] = RenormalizeAndClampAxis(
      input.axes[2], kSwitchProAxisXMin, kSwitchProAxisXMax);
  mapped->axes[AXIS_INDEX_RIGHT_STICK_Y] = RenormalizeAndClampAxis(
      input.axes[3], kSwitchProAxisYMin, kSwitchProAxisYMax);

  mapped->buttons_length = SWITCH_PRO_BUTTON_COUNT;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

void MapperLogitechDInput(const Gamepad& input, Gamepad* mapped) {
  *mapped = input;
  mapped->buttons[BUTTON_INDEX_PRIMARY] = input.buttons[1];
  mapped->buttons[BUTTON_INDEX_SECONDARY] = input.buttons[2];
  mapped->buttons[BUTTON_INDEX_TERTIARY] = input.buttons[0];
  mapped->buttons[BUTTON_INDEX_DPAD_UP] = AxisNegativeAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_DOWN] = AxisPositiveAsButton(input.axes[5]);
  mapped->buttons[BUTTON_INDEX_DPAD_LEFT] = AxisNegativeAsButton(input.axes[4]);
  mapped->buttons[BUTTON_INDEX_DPAD_RIGHT] =
      AxisPositiveAsButton(input.axes[4]);

  // The Logitech button (BUTTON_INDEX_META) is not accessible through the
  // device's D-mode.
  mapped->buttons_length = BUTTON_INDEX_COUNT - 1;
  mapped->axes_length = AXIS_INDEX_COUNT;
}

struct MappingData {
  const char* const vendor_id;
  const char* const product_id;
  GamepadStandardMappingFunction function;
} AvailableMappings[] = {
    // http://www.linux-usb.org/usb.ids
    {"0079", "0006", MapperDragonRiseGeneric},   // DragonRise Generic USB
    {"045e", "028e", MapperXInputStyleGamepad},  // Xbox 360 Wired
    {"045e", "028f", MapperXInputStyleGamepad},  // Xbox 360 Wireless
    {"045e", "02a1", MapperXInputStyleGamepad},  // Xbox 360 Wireless
    {"045e", "0291", MapperXInputStyleGamepad},  // Xbox 360 Wireless
    {"045e", "02d1", MapperXInputStyleGamepad},  // Xbox One Wired
    {"045e", "02dd", MapperXInputStyleGamepad},  // Xbox One Wired (2015 FW)
    {"045e", "02e0", MapperXboxOneS},            // Xbox One S (Bluetooth)
    {"045e", "02e3", MapperXInputStyleGamepad},  // Xbox One Elite Wired
    {"045e", "02ea", MapperXInputStyleGamepad},  // Xbox One S (USB)
    {"045e", "02fd", MapperXboxOneS2016Firmware},  // Xbox One S (Bluetooth)
    {"045e", "0719", MapperXInputStyleGamepad},  // Xbox 360 Wireless
    {"046d", "c216", MapperLogitechDInput},      // Logitech F310 D-mode
    {"046d", "c218", MapperLogitechDInput},      // Logitech F510 D-mode
    {"046d", "c219", MapperLogitechDInput},      // Logitech F710 D-mode
    {"046d", "c21d", MapperXInputStyleGamepad},  // Logitech F310 X-mode
    {"046d", "c21e", MapperXInputStyleGamepad},  // Logitech F510 X-mode
    {"046d", "c21f", MapperXInputStyleGamepad},  // Logitech F710 X-mode
    {"04e8", "a000", MapperSamsung_EI_GP20},     // Samsung Gamepad EI-GP20
    {"054c", "0268", MapperDualshock3SixAxis},   // Dualshock 3 / SIXAXIS
    {"054c", "05c4", MapperDualshock4},          // Playstation Dualshock 4
    {"054c", "09cc", MapperDualshock4},          // Dualshock 4 (PS4 Slim)
    {"054c", "0ba0", MapperDualshock4},          // Dualshock 4 USB receiver
    {"057e", "2009", MapperSwitchProUsb},        // Switch Pro Controller
    {"0583", "2060", MapperIBuffalo},            // iBuffalo Classic
    {"0925", "0005", MapperLakeviewResearch},    // SmartJoy PLUS Adapter
    {"0925", "8866", MapperLakeviewResearch},    // WiseGroup MP-8866
    {"0955", "7210", MapperNvShield},            // Nvidia Shield gamepad (2015)
    {"0955", "7214", MapperNvShield2017},        // Nvidia Shield gamepad (2017)
    {"0b05", "4500", MapperADT1},                // Nexus Player Controller
    {"0e8f", "0003", MapperXGEAR},           // XFXforce XGEAR PS2 Controller
    {"1038", "1412", MapperSteelSeries},     // Zeemote: SteelSeries FREE
    {"1532", "0900", MapperRazerServal},     // Razer Serval Controller
    {"18d1", "2c40", MapperADT1},            // ADT-1 Controller
    {"20d6", "6271", MapperMoga},            // Moga Pro Controller (HID mode)
    {"20d6", "89e5", MapperMoga},            // Moga 2 HID
    {"2378", "1008", MapperOnLiveWireless},  // OnLive Controller (Bluetooth)
    {"2378", "100a", MapperOnLiveWireless},  // OnLive Controller (Wired)
    {"2836", "0001", MapperOUYA},            // OUYA Controller
};

}  // namespace

GamepadStandardMappingFunction GetGamepadStandardMappingFunction(
    const base::StringPiece& vendor_id,
    const base::StringPiece& product_id,
    const base::StringPiece& version_number,
    GamepadBusType bus_type) {
  GamepadStandardMappingFunction mapper = nullptr;
  for (size_t i = 0; i < arraysize(AvailableMappings); ++i) {
    MappingData& item = AvailableMappings[i];
    if (vendor_id == item.vendor_id && product_id == item.product_id) {
      mapper = item.function;
      break;
    }
  }

  // The Linux kernel was updated in version 4.10 to better support Dualshock 4
  // and Dualshock 3/SIXAXIS gamepads. The driver patches the hardware version
  // when using the new mapping to allow downstream users to distinguish them.
  if (mapper == MapperDualshock4 && version_number == "8111") {
    mapper = MapperDualshock4New;
  } else if (mapper == MapperDualshock3SixAxis && version_number == "8111") {
    mapper = MapperDualshock3SixAxisNew;
  }

  // The Nintendo Switch Pro controller exposes the same product ID when
  // connected over USB or Bluetooth but communicates using different protocols.
  // In Bluetooth mode it uses standard HID, but in USB mode it uses a
  // vendor-specific protocol. Select a mapper depending on the connection type.
  if (mapper == MapperSwitchProUsb && bus_type == GAMEPAD_BUS_BLUETOOTH)
    mapper = MapperSwitchProBluetooth;

  return mapper;
}

}  // namespace device