ref: ce8b5651bc33720a4f34309c81d0b12d7ce5791e
dir: /external/SDL2/src/hidapi/ios/hid.m/
//======== Copyright (c) 2017 Valve Corporation, All rights reserved. =========
//
// Purpose: HID device abstraction temporary stub
//
//=============================================================================
#include "../../SDL_internal.h"
#ifdef SDL_JOYSTICK_HIDAPI
#include <CoreBluetooth/CoreBluetooth.h>
#include <QuartzCore/QuartzCore.h>
#import <UIKit/UIKit.h>
#import <mach/mach_time.h>
#include <pthread.h>
#include <sys/time.h>
#include <unistd.h>
#include "../hidapi/hidapi.h"
#define VALVE_USB_VID 0x28DE
#define D0G_BLE2_PID 0x1106
typedef uint32_t uint32;
typedef uint64_t uint64;
// enables detailed NSLog logging of feature reports
#define FEATURE_REPORT_LOGGING 0
#define REPORT_SEGMENT_DATA_FLAG 0x80
#define REPORT_SEGMENT_LAST_FLAG 0x40
#define VALVE_SERVICE @"100F6C32-1735-4313-B402-38567131E5F3"
// (READ/NOTIFICATIONS)
#define VALVE_INPUT_CHAR @"100F6C33-1735-4313-B402-38567131E5F3"
// (READ/WRITE)
#define VALVE_REPORT_CHAR @"100F6C34-1735-4313-B402-38567131E5F3"
// TODO: create CBUUID's in __attribute__((constructor)) rather than doing [CBUUID UUIDWithString:...] everywhere
#pragma pack(push,1)
typedef struct
{
uint8_t segmentHeader;
uint8_t featureReportMessageID;
uint8_t length;
uint8_t settingIdentifier;
union {
uint16_t usPayload;
uint32_t uPayload;
uint64_t ulPayload;
uint8_t ucPayload[15];
};
} bluetoothSegment;
typedef struct {
uint8_t id;
union {
bluetoothSegment segment;
struct {
uint8_t segmentHeader;
uint8_t featureReportMessageID;
uint8_t length;
uint8_t settingIdentifier;
union {
uint16_t usPayload;
uint32_t uPayload;
uint64_t ulPayload;
uint8_t ucPayload[15];
};
};
};
} hidFeatureReport;
#pragma pack(pop)
size_t GetBluetoothSegmentSize(bluetoothSegment *segment)
{
return segment->length + 3;
}
#define RingBuffer_cbElem 19
#define RingBuffer_nElem 4096
typedef struct {
int _first, _last;
uint8_t _data[ ( RingBuffer_nElem * RingBuffer_cbElem ) ];
pthread_mutex_t accessLock;
} RingBuffer;
static void RingBuffer_init( RingBuffer *this )
{
this->_first = -1;
this->_last = 0;
pthread_mutex_init( &this->accessLock, 0 );
}
static bool RingBuffer_write( RingBuffer *this, const uint8_t *src )
{
pthread_mutex_lock( &this->accessLock );
memcpy( &this->_data[ this->_last ], src, RingBuffer_cbElem );
if ( this->_first == -1 )
{
this->_first = this->_last;
}
this->_last = ( this->_last + RingBuffer_cbElem ) % (RingBuffer_nElem * RingBuffer_cbElem);
if ( this->_last == this->_first )
{
this->_first = ( this->_first + RingBuffer_cbElem ) % (RingBuffer_nElem * RingBuffer_cbElem);
pthread_mutex_unlock( &this->accessLock );
return false;
}
pthread_mutex_unlock( &this->accessLock );
return true;
}
static bool RingBuffer_read( RingBuffer *this, uint8_t *dst )
{
pthread_mutex_lock( &this->accessLock );
if ( this->_first == -1 )
{
pthread_mutex_unlock( &this->accessLock );
return false;
}
memcpy( dst, &this->_data[ this->_first ], RingBuffer_cbElem );
this->_first = ( this->_first + RingBuffer_cbElem ) % (RingBuffer_nElem * RingBuffer_cbElem);
if ( this->_first == this->_last )
{
this->_first = -1;
}
pthread_mutex_unlock( &this->accessLock );
return true;
}
#pragma mark HIDBLEDevice Definition
typedef enum
{
BLEDeviceWaitState_None,
BLEDeviceWaitState_Waiting,
BLEDeviceWaitState_Complete,
BLEDeviceWaitState_Error
} BLEDeviceWaitState;
@interface HIDBLEDevice : NSObject <CBPeripheralDelegate>
{
RingBuffer _inputReports;
uint8_t _featureReport[20];
BLEDeviceWaitState _waitStateForReadFeatureReport;
BLEDeviceWaitState _waitStateForWriteFeatureReport;
}
@property (nonatomic, readwrite) bool connected;
@property (nonatomic, readwrite) bool ready;
@property (nonatomic, strong) CBPeripheral *bleSteamController;
@property (nonatomic, strong) CBCharacteristic *bleCharacteristicInput;
@property (nonatomic, strong) CBCharacteristic *bleCharacteristicReport;
- (id)initWithPeripheral:(CBPeripheral *)peripheral;
@end
@interface HIDBLEManager : NSObject <CBCentralManagerDelegate>
@property (nonatomic) int nPendingScans;
@property (nonatomic) int nPendingPairs;
@property (nonatomic, strong) CBCentralManager *centralManager;
@property (nonatomic, strong) NSMapTable<CBPeripheral *, HIDBLEDevice *> *deviceMap;
@property (nonatomic, retain) dispatch_queue_t bleSerialQueue;
+ (instancetype)sharedInstance;
- (void)startScan:(int)duration;
- (void)stopScan;
- (int)updateConnectedSteamControllers:(BOOL) bForce;
- (void)appWillResignActiveNotification:(NSNotification *)note;
- (void)appDidBecomeActiveNotification:(NSNotification *)note;
@end
// singleton class - access using HIDBLEManager.sharedInstance
@implementation HIDBLEManager
+ (instancetype)sharedInstance
{
static HIDBLEManager *sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [HIDBLEManager new];
sharedInstance.nPendingScans = 0;
sharedInstance.nPendingPairs = 0;
[[NSNotificationCenter defaultCenter] addObserver:sharedInstance selector:@selector(appWillResignActiveNotification:) name: UIApplicationWillResignActiveNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:sharedInstance selector:@selector(appDidBecomeActiveNotification:) name:UIApplicationDidBecomeActiveNotification object:nil];
// receive reports on a high-priority serial-queue. optionally put writes on the serial queue to avoid logical
// race conditions talking to the controller from multiple threads, although BLE fragmentation/assembly means
// that we can still screw this up.
// most importantly we need to consume reports at a high priority to avoid the OS thinking we aren't really
// listening to the BLE device, as iOS on slower devices may stop delivery of packets to the app WITHOUT ACTUALLY
// DISCONNECTING FROM THE DEVICE if we don't react quickly enough to their delivery.
// see also the error-handling states in the peripheral delegate to re-open the device if it gets closed
sharedInstance.bleSerialQueue = dispatch_queue_create( "com.valvesoftware.steamcontroller.ble", DISPATCH_QUEUE_SERIAL );
dispatch_set_target_queue( sharedInstance.bleSerialQueue, dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_HIGH, 0 ) );
// creating a CBCentralManager will always trigger a future centralManagerDidUpdateState:
// where any scanning gets started or connecting to existing peripherals happens, it's never already in a
// powered-on state for a newly launched application.
sharedInstance.centralManager = [[CBCentralManager alloc] initWithDelegate:sharedInstance queue:sharedInstance.bleSerialQueue];
sharedInstance.deviceMap = [[NSMapTable alloc] initWithKeyOptions:NSMapTableWeakMemory valueOptions:NSMapTableStrongMemory capacity:4];
});
return sharedInstance;
}
// called for NSNotification UIApplicationWillResignActiveNotification
- (void)appWillResignActiveNotification:(NSNotification *)note
{
// we'll get resign-active notification if pairing is happening.
if ( self.nPendingPairs > 0 )
return;
for ( CBPeripheral *peripheral in self.deviceMap )
{
HIDBLEDevice *steamController = [self.deviceMap objectForKey:peripheral];
if ( steamController )
{
steamController.connected = NO;
steamController.ready = NO;
[self.centralManager cancelPeripheralConnection:peripheral];
}
}
[self.deviceMap removeAllObjects];
}
// called for NSNotification UIApplicationDidBecomeActiveNotification
// whenever the application comes back from being inactive, trigger a 20s pairing scan and reconnect
// any devices that may have paired while we were inactive.
- (void)appDidBecomeActiveNotification:(NSNotification *)note
{
[self updateConnectedSteamControllers:true];
[self startScan:20];
}
- (int)updateConnectedSteamControllers:(BOOL) bForce
{
static uint64_t s_unLastUpdateTick = 0;
static mach_timebase_info_data_t s_timebase_info;
if (s_timebase_info.denom == 0)
{
mach_timebase_info( &s_timebase_info );
}
uint64_t ticksNow = mach_approximate_time();
if ( !bForce && ( ( (ticksNow - s_unLastUpdateTick) * s_timebase_info.numer ) / s_timebase_info.denom ) < (5ull * NSEC_PER_SEC) )
return (int)self.deviceMap.count;
// we can see previously connected BLE peripherals but can't connect until the CBCentralManager
// is fully powered up - only do work when we are in that state
if ( self.centralManager.state != CBManagerStatePoweredOn )
return (int)self.deviceMap.count;
// only update our last-check-time if we actually did work, otherwise there can be a long delay during initial power-up
s_unLastUpdateTick = mach_approximate_time();
// if a pair is in-flight, the central manager may still give it back via retrieveConnected... and
// cause the SDL layer to attempt to initialize it while some of its endpoints haven't yet been established
if ( self.nPendingPairs > 0 )
return (int)self.deviceMap.count;
NSArray<CBPeripheral *> *peripherals = [self.centralManager retrieveConnectedPeripheralsWithServices: @[ [CBUUID UUIDWithString:@"180A"]]];
for ( CBPeripheral *peripheral in peripherals )
{
// we already know this peripheral
if ( [self.deviceMap objectForKey: peripheral] != nil )
continue;
NSLog( @"connected peripheral: %@", peripheral );
if ( [peripheral.name isEqualToString:@"SteamController"] )
{
HIDBLEDevice *steamController = [[HIDBLEDevice alloc] initWithPeripheral:peripheral];
[self.deviceMap setObject:steamController forKey:peripheral];
[self.centralManager connectPeripheral:peripheral options:nil];
}
}
return (int)self.deviceMap.count;
}
// manual API for folks to start & stop scanning
- (void)startScan:(int)duration
{
NSLog( @"BLE: requesting scan for %d seconds", duration );
@synchronized (self)
{
if ( _nPendingScans++ == 0 )
{
[self.centralManager scanForPeripheralsWithServices:nil options:nil];
}
}
if ( duration != 0 )
{
dispatch_after( dispatch_time( DISPATCH_TIME_NOW, (int64_t)(duration * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self stopScan];
});
}
}
- (void)stopScan
{
NSLog( @"BLE: stopping scan" );
@synchronized (self)
{
if ( --_nPendingScans <= 0 )
{
_nPendingScans = 0;
[self.centralManager stopScan];
}
}
}
#pragma mark CBCentralManagerDelegate Implementation
// called whenever the BLE hardware state changes.
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
switch ( central.state )
{
case CBCentralManagerStatePoweredOn:
{
NSLog( @"CoreBluetooth BLE hardware is powered on and ready" );
// at startup, if we have no already attached peripherals, do a 20s scan for new unpaired devices,
// otherwise callers should occaisionally do additional scans. we don't want to continuously be
// scanning because it drains battery, causes other nearby people to have a hard time pairing their
// Steam Controllers, and may also trigger firmware weirdness when a device attempts to start
// the pairing sequence multiple times concurrently
if ( [self updateConnectedSteamControllers:false] == 0 )
{
// TODO: we could limit our scan to only peripherals supporting the SteamController service, but
// that service doesn't currently fit in the base advertising packet, we'd need to put it into an
// extended scan packet. Useful optimization downstream, but not currently necessary
// NSArray *services = @[[CBUUID UUIDWithString:VALVE_SERVICE]];
[self startScan:20];
}
break;
}
case CBCentralManagerStatePoweredOff:
NSLog( @"CoreBluetooth BLE hardware is powered off" );
break;
case CBCentralManagerStateUnauthorized:
NSLog( @"CoreBluetooth BLE state is unauthorized" );
break;
case CBCentralManagerStateUnknown:
NSLog( @"CoreBluetooth BLE state is unknown" );
break;
case CBCentralManagerStateUnsupported:
NSLog( @"CoreBluetooth BLE hardware is unsupported on this platform" );
break;
case CBCentralManagerStateResetting:
NSLog( @"CoreBluetooth BLE manager is resetting" );
break;
}
}
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
HIDBLEDevice *steamController = [_deviceMap objectForKey:peripheral];
steamController.connected = YES;
self.nPendingPairs -= 1;
}
- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
NSLog( @"Failed to connect: %@", error );
[_deviceMap removeObjectForKey:peripheral];
self.nPendingPairs -= 1;
}
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
NSString *localName = [advertisementData objectForKey:CBAdvertisementDataLocalNameKey];
NSString *log = [NSString stringWithFormat:@"Found '%@'", localName];
if ( [localName isEqualToString:@"SteamController"] )
{
NSLog( @"%@ : %@ - %@", log, peripheral, advertisementData );
self.nPendingPairs += 1;
HIDBLEDevice *steamController = [[HIDBLEDevice alloc] initWithPeripheral:peripheral];
[self.deviceMap setObject:steamController forKey:peripheral];
[self.centralManager connectPeripheral:peripheral options:nil];
}
}
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
HIDBLEDevice *steamController = [self.deviceMap objectForKey:peripheral];
if ( steamController )
{
steamController.connected = NO;
steamController.ready = NO;
[self.deviceMap removeObjectForKey:peripheral];
}
}
@end
// Core Bluetooth devices calling back on event boundaries of their run-loops. so annoying.
static void process_pending_events()
{
CFRunLoopRunResult res;
do
{
res = CFRunLoopRunInMode( kCFRunLoopDefaultMode, 0.001, FALSE );
}
while( res != kCFRunLoopRunFinished && res != kCFRunLoopRunTimedOut );
}
@implementation HIDBLEDevice
- (id)init
{
if ( self = [super init] )
{
RingBuffer_init( &_inputReports );
self.bleSteamController = nil;
self.bleCharacteristicInput = nil;
self.bleCharacteristicReport = nil;
_connected = NO;
_ready = NO;
}
return self;
}
- (id)initWithPeripheral:(CBPeripheral *)peripheral
{
if ( self = [super init] )
{
RingBuffer_init( &_inputReports );
_connected = NO;
_ready = NO;
self.bleSteamController = peripheral;
if ( peripheral )
{
peripheral.delegate = self;
}
self.bleCharacteristicInput = nil;
self.bleCharacteristicReport = nil;
}
return self;
}
- (void)setConnected:(bool)connected
{
_connected = connected;
if ( _connected )
{
[_bleSteamController discoverServices:nil];
}
else
{
NSLog( @"Disconnected" );
}
}
- (size_t)read_input_report:(uint8_t *)dst
{
if ( RingBuffer_read( &_inputReports, dst+1 ) )
{
*dst = 0x03;
return 20;
}
return 0;
}
- (int)send_report:(const uint8_t *)data length:(size_t)length
{
[_bleSteamController writeValue:[NSData dataWithBytes:data length:length] forCharacteristic:_bleCharacteristicReport type:CBCharacteristicWriteWithResponse];
return (int)length;
}
- (int)send_feature_report:(hidFeatureReport *)report
{
#if FEATURE_REPORT_LOGGING
uint8_t *reportBytes = (uint8_t *)report;
NSLog( @"HIDBLE:send_feature_report (%02zu/19) [%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x]", GetBluetoothSegmentSize( report->segment ),
reportBytes[1], reportBytes[2], reportBytes[3], reportBytes[4], reportBytes[5], reportBytes[6],
reportBytes[7], reportBytes[8], reportBytes[9], reportBytes[10], reportBytes[11], reportBytes[12],
reportBytes[13], reportBytes[14], reportBytes[15], reportBytes[16], reportBytes[17], reportBytes[18],
reportBytes[19] );
#endif
int sendSize = (int)GetBluetoothSegmentSize( &report->segment );
if ( sendSize > 20 )
sendSize = 20;
#if 1
// fire-and-forget - we are going to not wait for the response here because all Steam Controller BLE send_feature_report's are ignored,
// except errors.
[_bleSteamController writeValue:[NSData dataWithBytes:&report->segment length:sendSize] forCharacteristic:_bleCharacteristicReport type:CBCharacteristicWriteWithResponse];
// pretend we received a result anybody cares about
return 19;
#else
// this is technically the correct send_feature_report logic if you want to make sure it gets through and is
// acknowledged or errors out
_waitStateForWriteFeatureReport = BLEDeviceWaitState_Waiting;
[_bleSteamController writeValue:[NSData dataWithBytes:&report->segment length:sendSize
] forCharacteristic:_bleCharacteristicReport type:CBCharacteristicWriteWithResponse];
while ( _waitStateForWriteFeatureReport == BLEDeviceWaitState_Waiting )
{
process_pending_events();
}
if ( _waitStateForWriteFeatureReport == BLEDeviceWaitState_Error )
{
_waitStateForWriteFeatureReport = BLEDeviceWaitState_None;
return -1;
}
_waitStateForWriteFeatureReport = BLEDeviceWaitState_None;
return 19;
#endif
}
- (int)get_feature_report:(uint8_t)feature into:(uint8_t *)buffer
{
_waitStateForReadFeatureReport = BLEDeviceWaitState_Waiting;
[_bleSteamController readValueForCharacteristic:_bleCharacteristicReport];
while ( _waitStateForReadFeatureReport == BLEDeviceWaitState_Waiting )
process_pending_events();
if ( _waitStateForReadFeatureReport == BLEDeviceWaitState_Error )
{
_waitStateForReadFeatureReport = BLEDeviceWaitState_None;
return -1;
}
memcpy( buffer, _featureReport, sizeof(_featureReport) );
_waitStateForReadFeatureReport = BLEDeviceWaitState_None;
#if FEATURE_REPORT_LOGGING
NSLog( @"HIDBLE:get_feature_report (19) [%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x]",
buffer[1], buffer[2], buffer[3], buffer[4], buffer[5], buffer[6],
buffer[7], buffer[8], buffer[9], buffer[10], buffer[11], buffer[12],
buffer[13], buffer[14], buffer[15], buffer[16], buffer[17], buffer[18],
buffer[19] );
#endif
return 19;
}
#pragma mark CBPeripheralDelegate Implementation
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
for (CBService *service in peripheral.services)
{
NSLog( @"Found Service: %@", service );
if ( [service.UUID isEqual:[CBUUID UUIDWithString:VALVE_SERVICE]] )
{
[peripheral discoverCharacteristics:nil forService:service];
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
// nothing yet needed here, enable for logging
if ( /* DISABLES CODE */ (0) )
{
for ( CBDescriptor *descriptor in characteristic.descriptors )
{
NSLog( @" - Descriptor '%@'", descriptor );
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
if ([service.UUID isEqual:[CBUUID UUIDWithString:VALVE_SERVICE]])
{
for (CBCharacteristic *aChar in service.characteristics)
{
NSLog( @"Found Characteristic %@", aChar );
if ( [aChar.UUID isEqual:[CBUUID UUIDWithString:VALVE_INPUT_CHAR]] )
{
self.bleCharacteristicInput = aChar;
}
else if ( [aChar.UUID isEqual:[CBUUID UUIDWithString:VALVE_REPORT_CHAR]] )
{
self.bleCharacteristicReport = aChar;
[self.bleSteamController discoverDescriptorsForCharacteristic: aChar];
}
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
static uint64_t s_ticksLastOverflowReport = 0;
// receiving an input report is the final indicator that the user accepted a pairing
// request and that we successfully established notification. CoreBluetooth has no
// notification of the pairing acknowledgement, which is a bad oversight.
if ( self.ready == NO )
{
self.ready = YES;
HIDBLEManager.sharedInstance.nPendingPairs -= 1;
}
if ( [characteristic.UUID isEqual:_bleCharacteristicInput.UUID] )
{
NSData *data = [characteristic value];
if ( data.length != 19 )
{
NSLog( @"HIDBLE: incoming data is %lu bytes should be exactly 19", (unsigned long)data.length );
}
if ( !RingBuffer_write( &_inputReports, (const uint8_t *)data.bytes ) )
{
uint64_t ticksNow = mach_approximate_time();
if ( ticksNow - s_ticksLastOverflowReport > (5ull * NSEC_PER_SEC / 10) )
{
NSLog( @"HIDBLE: input report buffer overflow" );
s_ticksLastOverflowReport = ticksNow;
}
}
}
else if ( [characteristic.UUID isEqual:_bleCharacteristicReport.UUID] )
{
memset( _featureReport, 0, sizeof(_featureReport) );
if ( error != nil )
{
NSLog( @"HIDBLE: get_feature_report error: %@", error );
_waitStateForReadFeatureReport = BLEDeviceWaitState_Error;
}
else
{
NSData *data = [characteristic value];
if ( data.length != 20 )
{
NSLog( @"HIDBLE: incoming data is %lu bytes should be exactly 20", (unsigned long)data.length );
}
memcpy( _featureReport, data.bytes, MIN( data.length, sizeof(_featureReport) ) );
_waitStateForReadFeatureReport = BLEDeviceWaitState_Complete;
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
if ( [characteristic.UUID isEqual:[CBUUID UUIDWithString:VALVE_REPORT_CHAR]] )
{
if ( error != nil )
{
NSLog( @"HIDBLE: write_feature_report error: %@", error );
_waitStateForWriteFeatureReport = BLEDeviceWaitState_Error;
}
else
{
_waitStateForWriteFeatureReport = BLEDeviceWaitState_Complete;
}
}
}
- (void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
NSLog( @"didUpdateNotifcationStateForCharacteristic %@ (%@)", characteristic, error );
}
@end
#pragma mark hid_api implementation
struct hid_device_ {
void *device_handle;
int blocking;
hid_device *next;
};
int HID_API_EXPORT HID_API_CALL hid_init(void)
{
return ( HIDBLEManager.sharedInstance == nil ) ? -1 : 0;
}
int HID_API_EXPORT HID_API_CALL hid_exit(void)
{
return 0;
}
void HID_API_EXPORT HID_API_CALL hid_ble_scan( bool bStart )
{
HIDBLEManager *bleManager = HIDBLEManager.sharedInstance;
if ( bStart )
{
[bleManager startScan:0];
}
else
{
[bleManager stopScan];
}
}
hid_device * HID_API_EXPORT hid_open_path( const char *path, int bExclusive /* = false */ )
{
hid_device *result = NULL;
NSString *nssPath = [NSString stringWithUTF8String:path];
HIDBLEManager *bleManager = HIDBLEManager.sharedInstance;
NSEnumerator<HIDBLEDevice *> *devices = [bleManager.deviceMap objectEnumerator];
for ( HIDBLEDevice *device in devices )
{
// we have the device but it hasn't found its service or characteristics until it is connected
if ( !device.ready || !device.connected || !device.bleCharacteristicInput )
continue;
if ( [device.bleSteamController.identifier.UUIDString isEqualToString:nssPath] )
{
result = (hid_device *)malloc( sizeof( hid_device ) );
memset( result, 0, sizeof( hid_device ) );
result->device_handle = (void*)CFBridgingRetain( device );
result->blocking = NO;
// enable reporting input events on the characteristic
[device.bleSteamController setNotifyValue:YES forCharacteristic:device.bleCharacteristicInput];
return result;
}
}
return result;
}
void HID_API_EXPORT hid_free_enumeration(struct hid_device_info *devs)
{
/* This function is identical to the Linux version. Platform independent. */
struct hid_device_info *d = devs;
while (d) {
struct hid_device_info *next = d->next;
free(d->path);
free(d->serial_number);
free(d->manufacturer_string);
free(d->product_string);
free(d);
d = next;
}
}
int HID_API_EXPORT hid_set_nonblocking(hid_device *dev, int nonblock)
{
/* All Nonblocking operation is handled by the library. */
dev->blocking = !nonblock;
return 0;
}
struct hid_device_info HID_API_EXPORT *hid_enumerate(unsigned short vendor_id, unsigned short product_id)
{ @autoreleasepool {
struct hid_device_info *root = NULL;
if ( ( vendor_id == 0 && product_id == 0 ) ||
( vendor_id == VALVE_USB_VID && product_id == D0G_BLE2_PID ) )
{
HIDBLEManager *bleManager = HIDBLEManager.sharedInstance;
[bleManager updateConnectedSteamControllers:false];
NSEnumerator<HIDBLEDevice *> *devices = [bleManager.deviceMap objectEnumerator];
for ( HIDBLEDevice *device in devices )
{
// there are several brief windows in connecting to an already paired device and
// one long window waiting for users to confirm pairing where we don't want
// to consider a device ready - if we hand it back to SDL or another
// Steam Controller consumer, their additional SC setup work will fail
// in unusual/silent ways and we can actually corrupt the BLE stack for
// the entire system and kill the appletv remote's Menu button (!)
if ( device.bleSteamController.state != CBPeripheralStateConnected ||
device.connected == NO || device.ready == NO )
{
if ( device.ready == NO && device.bleCharacteristicInput != nil )
{
// attempt to register for input reports. this call will silently fail
// until the pairing finalizes with user acceptance. oh, apple.
[device.bleSteamController setNotifyValue:YES forCharacteristic:device.bleCharacteristicInput];
}
continue;
}
struct hid_device_info *device_info = (struct hid_device_info *)malloc( sizeof(struct hid_device_info) );
memset( device_info, 0, sizeof(struct hid_device_info) );
device_info->next = root;
root = device_info;
device_info->path = strdup( device.bleSteamController.identifier.UUIDString.UTF8String );
device_info->vendor_id = VALVE_USB_VID;
device_info->product_id = D0G_BLE2_PID;
device_info->product_string = wcsdup( L"Steam Controller" );
device_info->manufacturer_string = wcsdup( L"Valve Corporation" );
}
}
return root;
}}
int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *dev, wchar_t *string, size_t maxlen)
{
static wchar_t s_wszManufacturer[] = L"Valve Corporation";
wcsncpy( string, s_wszManufacturer, sizeof(s_wszManufacturer)/sizeof(s_wszManufacturer[0]) );
return 0;
}
int HID_API_EXPORT_CALL hid_get_product_string(hid_device *dev, wchar_t *string, size_t maxlen)
{
static wchar_t s_wszProduct[] = L"Steam Controller";
wcsncpy( string, s_wszProduct, sizeof(s_wszProduct)/sizeof(s_wszProduct[0]) );
return 0;
}
int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *dev, wchar_t *string, size_t maxlen)
{
static wchar_t s_wszSerial[] = L"12345";
wcsncpy( string, s_wszSerial, sizeof(s_wszSerial)/sizeof(s_wszSerial[0]) );
return 0;
}
int HID_API_EXPORT hid_write(hid_device *dev, const unsigned char *data, size_t length)
{
HIDBLEDevice *device_handle = (__bridge HIDBLEDevice *)dev->device_handle;
if ( !device_handle.connected )
return -1;
return [device_handle send_report:data length:length];
}
void HID_API_EXPORT hid_close(hid_device *dev)
{
HIDBLEDevice *device_handle = CFBridgingRelease( dev->device_handle );
// disable reporting input events on the characteristic
if ( device_handle.connected ) {
[device_handle.bleSteamController setNotifyValue:NO forCharacteristic:device_handle.bleCharacteristicInput];
}
free( dev );
}
int HID_API_EXPORT hid_send_feature_report(hid_device *dev, const unsigned char *data, size_t length)
{
HIDBLEDevice *device_handle = (__bridge HIDBLEDevice *)dev->device_handle;
if ( !device_handle.connected )
return -1;
return [device_handle send_feature_report:(hidFeatureReport *)(void *)data];
}
int HID_API_EXPORT hid_get_feature_report(hid_device *dev, unsigned char *data, size_t length)
{
HIDBLEDevice *device_handle = (__bridge HIDBLEDevice *)dev->device_handle;
if ( !device_handle.connected )
return -1;
size_t written = [device_handle get_feature_report:data[0] into:data];
return written == length-1 ? (int)length : (int)written;
}
int HID_API_EXPORT hid_read(hid_device *dev, unsigned char *data, size_t length)
{
HIDBLEDevice *device_handle = (__bridge HIDBLEDevice *)dev->device_handle;
if ( !device_handle.connected )
return -1;
return hid_read_timeout(dev, data, length, 0);
}
int HID_API_EXPORT hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
{
HIDBLEDevice *device_handle = (__bridge HIDBLEDevice *)dev->device_handle;
if ( !device_handle.connected )
return -1;
if ( milliseconds != 0 )
{
NSLog( @"hid_read_timeout with non-zero wait" );
}
int result = (int)[device_handle read_input_report:data];
#if FEATURE_REPORT_LOGGING
NSLog( @"HIDBLE:hid_read_timeout (%d) [%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x]", result,
data[1], data[2], data[3], data[4], data[5], data[6],
data[7], data[8], data[9], data[10], data[11], data[12],
data[13], data[14], data[15], data[16], data[17], data[18],
data[19] );
#endif
return result;
}
#endif /* SDL_JOYSTICK_HIDAPI */