author Ryan C. Gordon <>
Sun, 28 Aug 2016 13:36:13 -0400
changeset 10286 3b884985835c
parent 9998 f67cf37e9cd4
permissions -rw-r--r--
Merge audio capture work back into the mainline.

  Simple DirectMedia Layer
  Copyright (C) 1997-2016 Sam Lantinga <>

  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"


#include <IOKit/hid/IOHIDLib.h>

struct recElement
    IOHIDElementRef elementRef;
    IOHIDElementCookie cookie;
    uint32_t usagePage, usage;      /* HID usage */
    SInt32 min;                   /* reported min value possible */
    SInt32 max;                   /* reported max value possible */

    /* runtime variables used for auto-calibration */
    SInt32 minReport;             /* min returned value */
    SInt32 maxReport;             /* max returned value */

    struct recElement *pNext;   /* next element in list */
typedef struct recElement recElement;

struct joystick_hwdata
    IOHIDDeviceRef deviceRef;   /* HIDManager device handle */
    io_service_t ffservice;     /* Interface for force feedback, 0 = no ff */

    char product[256];          /* name of product */
    uint32_t usage;                 /* usage page from IOUSBHID Parser.h which defines general usage */
    uint32_t usagePage;             /* usage within above page from IOUSBHID Parser.h which defines specific usage */

    int axes;                  /* number of axis (calculated, not reported by device) */
    int buttons;               /* number of buttons (calculated, not reported by device) */
    int hats;                  /* number of hat switches (calculated, not reported by device) */
    int elements;              /* number of total elements (should be total of above) (calculated, not reported by device) */

    recElement *firstAxis;
    recElement *firstButton;
    recElement *firstHat;

    SDL_bool removed;

    int instance_id;
    SDL_JoystickGUID guid;

    struct joystick_hwdata *pNext;      /* next device */
typedef struct joystick_hwdata recDevice;