RetroArch/apple/OSX/hid_pad.c

189 lines
7.2 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2013 - Jason Fetters
*
* 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 <IOKit/hid/IOHIDManager.h>
#include "apple/common/apple_input.h"
struct apple_pad_connection
{
uint32_t slot;
IOHIDDeviceRef device;
uint8_t data[2048];
};
static IOHIDManagerRef g_hid_manager;
void apple_pad_send_control(struct apple_pad_connection* connection, uint8_t* data, size_t size)
{
IOHIDDeviceSetReport(connection->device, kIOHIDReportTypeOutput, 0x01, data + 1, size - 1);
}
// NOTE: I pieced this together through trial and error, any corrections are welcome
static void hid_device_input_callback(void* context, IOReturn result, void* sender, IOHIDValueRef value)
{
struct apple_pad_connection* connection = context;
IOHIDElementRef element = IOHIDValueGetElement(value);
uint32_t type = IOHIDElementGetType(element);
uint32_t page = IOHIDElementGetUsagePage(element);
uint32_t use = IOHIDElementGetUsage(element);
// Mouse handler
if (!connection)
{
if (type == kIOHIDElementTypeInput_Button && page == kHIDPage_Button)
{
CFIndex state = IOHIDValueGetIntegerValue(value);
if (state) g_current_input_data.mouse_buttons |= (1 << (use - 1));
else g_current_input_data.mouse_buttons &= ~(1 << (use - 1));
}
else if (type == kIOHIDElementTypeInput_Misc && page == kHIDPage_GenericDesktop)
{
static const uint32_t axis_use_ids[2] = { 48, 49 };
for (int i = 0; i < 2; i ++)
if (use == axis_use_ids[i])
g_current_input_data.mouse_delta[i] += IOHIDValueGetIntegerValue(value);
}
}
// Joystick handler: TODO: Can GamePad work the same?
else if (IOHIDDeviceConformsTo(connection->device, kHIDPage_GenericDesktop, kHIDUsage_GD_Joystick))
{
if (type == kIOHIDElementTypeInput_Button && page == kHIDPage_Button)
{
CFIndex state = IOHIDValueGetIntegerValue(value);
if (state) g_current_input_data.pad_buttons[connection->slot] |= (1 << (use - 1));
else g_current_input_data.pad_buttons[connection->slot] &= ~(1 << (use - 1));
}
else if (type == kIOHIDElementTypeInput_Misc && page == kHIDPage_GenericDesktop)
{
static const uint32_t axis_use_ids[4] = { 48, 49, 50, 53 };
for (int i = 0; i < 4; i ++)
{
if (use == axis_use_ids[i])
{
CFIndex min = IOHIDElementGetPhysicalMin(element);
CFIndex max = IOHIDElementGetPhysicalMax(element) - min;
CFIndex state = IOHIDValueGetIntegerValue(value) - min;
float val = (float)state / (float)max;
g_current_input_data.pad_axis[connection->slot][i] = ((val * 2.0f) - 1.0f) * 32767.0f;
}
}
}
}
}
static void hid_device_removed(void* context, IOReturn result, void* sender)
{
struct apple_pad_connection* connection = (struct apple_pad_connection*)context;
if (connection && connection->slot < MAX_PLAYERS)
{
g_current_input_data.pad_buttons[connection->slot] = 0;
memset(g_current_input_data.pad_axis[connection->slot], 0, sizeof(g_current_input_data.pad_axis));
apple_joypad_disconnect(connection->slot);
free(connection);
}
IOHIDDeviceClose(sender, kIOHIDOptionsTypeNone);
}
static void hid_device_report(void* context, IOReturn result, void *sender, IOHIDReportType type, uint32_t reportID, uint8_t *report, CFIndex reportLength)
{
struct apple_pad_connection* connection = (struct apple_pad_connection*)context;
apple_joypad_packet(connection->slot, connection->data, reportLength + 1);
}
static void hid_manager_device_attached(void* context, IOReturn result, void* sender, IOHIDDeviceRef device)
{
bool is_pad = (IOHIDDeviceConformsTo(device, kHIDPage_GenericDesktop, kHIDUsage_GD_Joystick) ||
IOHIDDeviceConformsTo(device, kHIDPage_GenericDesktop, kHIDUsage_GD_GamePad));
struct apple_pad_connection* connection = calloc(1, sizeof(struct apple_pad_connection));
connection->device = device;
connection->slot = MAX_PLAYERS;
IOHIDDeviceOpen(device, kIOHIDOptionsTypeNone);
IOHIDDeviceScheduleWithRunLoop(device, CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
IOHIDDeviceRegisterRemovalCallback(device, hid_device_removed, connection);
CFStringRef device_name = IOHIDDeviceGetProperty(device, CFSTR(kIOHIDProductKey));
if (is_pad && device_name)
{
char buffer[1024];
CFStringGetCString(device_name, buffer, 1024, kCFStringEncodingUTF8);
connection->slot = apple_joypad_connect(buffer, connection);
IOHIDDeviceRegisterInputReportCallback(device, connection->data + 1, sizeof(connection->data) - 1, hid_device_report, connection);
}
else
IOHIDDeviceRegisterInputValueCallback(device, hid_device_input_callback, connection);
}
static void append_matching_dictionary(CFMutableArrayRef array, uint32_t page, uint32_t use)
{
CFMutableDictionaryRef matcher = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFNumberRef pagen = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &page);
CFDictionarySetValue(matcher, CFSTR(kIOHIDDeviceUsagePageKey), pagen);
CFRelease(pagen);
CFNumberRef usen = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &use);
CFDictionarySetValue(matcher, CFSTR(kIOHIDDeviceUsageKey), usen);
CFRelease(usen);
CFArrayAppendValue(array, matcher);
CFRelease(matcher);
}
void osx_pad_init()
{
if (!g_hid_manager)
{
g_hid_manager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
CFMutableArrayRef matcher = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
append_matching_dictionary(matcher, kHIDPage_GenericDesktop, kHIDUsage_GD_Mouse);
append_matching_dictionary(matcher, kHIDPage_GenericDesktop, kHIDUsage_GD_Joystick);
append_matching_dictionary(matcher, kHIDPage_GenericDesktop, kHIDUsage_GD_GamePad);
IOHIDManagerSetDeviceMatchingMultiple(g_hid_manager, matcher);
CFRelease(matcher);
IOHIDManagerRegisterDeviceMatchingCallback(g_hid_manager, hid_manager_device_attached, 0);
IOHIDManagerScheduleWithRunLoop(g_hid_manager, CFRunLoopGetMain(), kCFRunLoopCommonModes);
IOHIDManagerOpen(g_hid_manager, kIOHIDOptionsTypeNone);
}
}
void osx_pad_quit()
{
if (g_hid_manager)
{
IOHIDManagerClose(g_hid_manager, kIOHIDOptionsTypeNone);
IOHIDManagerUnscheduleFromRunLoop(g_hid_manager, CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
CFRelease(g_hid_manager);
}
g_hid_manager = 0;
}