SameBoy/JoyKit/JOYElement.m

97 lines
2.4 KiB
Objective-C

#import "JOYElement.h"
#include <IOKit/hid/IOHIDLib.h>
@implementation JOYElement
{
id _element;
IOHIDDeviceRef _device;
int32_t _min, _max;
}
- (int32_t)min
{
return MIN(_min, _max);
}
- (int32_t)max
{
return MAX(_max, _min);
}
-(void)setMin:(int32_t)min
{
_min = min;
}
- (void)setMax:(int32_t)max
{
_max = max;
}
- (instancetype)initWithElement:(IOHIDElementRef)element
{
if ((self = [super init])) {
_element = (__bridge id)element;
_usage = IOHIDElementGetUsage(element);
_usagePage = IOHIDElementGetUsagePage(element);
_uniqueID = (uint32_t)IOHIDElementGetCookie(element);
_min = (int32_t) IOHIDElementGetLogicalMin(element);
_max = (int32_t) IOHIDElementGetLogicalMax(element);
_reportID = IOHIDElementGetReportID(element);
IOHIDElementRef parent = IOHIDElementGetParent(element);
_parentID = parent? (uint32_t)IOHIDElementGetCookie(parent) : -1;
_device = IOHIDElementGetDevice(element);
}
return self;
}
- (int32_t)value
{
IOHIDValueRef value = NULL;
IOHIDDeviceGetValue(_device, (__bridge IOHIDElementRef)_element, &value);
if (!value) return 0;
CFRelease(CFRetain(value)); // For some reason, this is required to prevent leaks.
return (int32_t)IOHIDValueGetIntegerValue(value);
}
- (NSData *)dataValue
{
IOHIDValueRef value = NULL;
IOHIDDeviceGetValue(_device, (__bridge IOHIDElementRef)_element, &value);
if (!value) return 0;
CFRelease(CFRetain(value)); // For some reason, this is required to prevent leaks.
return [NSData dataWithBytes:IOHIDValueGetBytePtr(value) length:IOHIDValueGetLength(value)];
}
- (void)setValue:(uint32_t)value
{
IOHIDValueRef ivalue = IOHIDValueCreateWithIntegerValue(NULL, (__bridge IOHIDElementRef)_element, 0, value);
IOHIDDeviceSetValue(_device, (__bridge IOHIDElementRef)_element, ivalue);
CFRelease(ivalue);
}
- (void)setDataValue:(NSData *)value
{
IOHIDValueRef ivalue = IOHIDValueCreateWithBytes(NULL, (__bridge IOHIDElementRef)_element, 0, value.bytes, value.length);
IOHIDDeviceSetValue(_device, (__bridge IOHIDElementRef)_element, ivalue);
CFRelease(ivalue);
}
/* For use as a dictionary key */
- (NSUInteger)hash
{
return self.uniqueID;
}
- (BOOL)isEqual:(id)object
{
return self->_element == object;
}
- (id)copyWithZone:(nullable NSZone *)zone;
{
return self;
}
@end