/*

  Simple DirectMedia Layer

  Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>

​

  This software is provided 'as-is', without any express or implied

  warranty.  In no event will the authors be held liable for any damages

  arising from the use of this software.

​

  Permission is granted to anyone to use this software for any purpose,

  including commercial applications, and to alter it and redistribute it

  freely, subject to the following restrictions:

​

  1. The origin of this software must not be misrepresented; you must not

     claim that you wrote the original software. If you use this software

     in a product, an acknowledgment in the product documentation would be

     appreciated but is not required.

  2. Altered source versions must be plainly marked as such, and must not be

     misrepresented as being the original software.

  3. This notice may not be removed or altered from any source distribution.

*/

#include "SDL_internal.h"

​

#ifdef SDL_JOYSTICK_HIDAPI

​

#include "../SDL_sysjoystick.h"

#include "SDL_hidapijoystick_c.h"

#include "SDL_hidapi_rumble.h"

​

#ifdef SDL_JOYSTICK_HIDAPI_LUNA

​

/* Define this if you want to log all packets from the controller */

/*#define DEBUG_LUNA_PROTOCOL*/

​

/* Sending rumble on macOS blocks for a long time and eventually fails */

#ifndef SDL_PLATFORM_MACOS

#define ENABLE_LUNA_BLUETOOTH_RUMBLE

#endif

​

enum

{

    SDL_GAMEPAD_BUTTON_LUNA_MICROPHONE = 11,

    SDL_GAMEPAD_NUM_LUNA_BUTTONS,

};

​

typedef struct

{

    Uint8 last_state[USB_PACKET_LENGTH];

} SDL_DriverLuna_Context;

​

static void HIDAPI_DriverLuna_RegisterHints(SDL_HintCallback callback, void *userdata)

{

    SDL_AddHintCallback(SDL_HINT_JOYSTICK_HIDAPI_LUNA, callback, userdata);

}

​

static void HIDAPI_DriverLuna_UnregisterHints(SDL_HintCallback callback, void *userdata)

{

    SDL_DelHintCallback(SDL_HINT_JOYSTICK_HIDAPI_LUNA, callback, userdata);

}

​

static SDL_bool HIDAPI_DriverLuna_IsEnabled(void)

{

    return SDL_GetHintBoolean(SDL_HINT_JOYSTICK_HIDAPI_LUNA, SDL_GetHintBoolean(SDL_HINT_JOYSTICK_HIDAPI, SDL_HIDAPI_DEFAULT));

}

​

static SDL_bool HIDAPI_DriverLuna_IsSupportedDevice(SDL_HIDAPI_Device *device, const char *name, SDL_GamepadType type, Uint16 vendor_id, Uint16 product_id, Uint16 version, int interface_number, int interface_class, int interface_subclass, int interface_protocol)

{

    return SDL_IsJoystickAmazonLunaController(vendor_id, product_id);

}

​

static SDL_bool HIDAPI_DriverLuna_InitDevice(SDL_HIDAPI_Device *device)

{

    SDL_DriverLuna_Context *ctx;

​

    ctx = (SDL_DriverLuna_Context *)SDL_calloc(1, sizeof(*ctx));

    if (!ctx) {

        return SDL_FALSE;

    }

    device->context = ctx;

​

    HIDAPI_SetDeviceName(device, "Amazon Luna Controller");

​

    return HIDAPI_JoystickConnected(device, NULL);

}

​

static int HIDAPI_DriverLuna_GetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id)

{

    return -1;

}

​

static void HIDAPI_DriverLuna_SetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id, int player_index)

{

}

​

static SDL_bool HIDAPI_DriverLuna_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)

{

    SDL_DriverLuna_Context *ctx = (SDL_DriverLuna_Context *)device->context;

​

    SDL_AssertJoysticksLocked();

​

    SDL_zeroa(ctx->last_state);

​

    /* Initialize the joystick capabilities */

    joystick->nbuttons = SDL_GAMEPAD_NUM_LUNA_BUTTONS;

    joystick->naxes = SDL_GAMEPAD_AXIS_MAX;

    joystick->nhats = 1;

​

    return SDL_TRUE;

}

​

static int HIDAPI_DriverLuna_RumbleJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)

{

#ifdef ENABLE_LUNA_BLUETOOTH_RUMBLE

    if (device->product_id == BLUETOOTH_PRODUCT_LUNA_CONTROLLER) {

        /* Same packet as on Xbox One controllers connected via Bluetooth */

        Uint8 rumble_packet[] = { 0x03, 0x0F, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0xEB };

​

        /* Magnitude is 1..100 so scale the 16-bit input here */

        rumble_packet[4] = (Uint8)(low_frequency_rumble / 655);

        rumble_packet[5] = (Uint8)(high_frequency_rumble / 655);