source: code/branches/wiimote/src/external/wiicpp/wiic/io_mac.m @ 11260

/*
 *      io_mac.m
 *
 *      Written By:
 *              Gabriele Randelli       
 *              Email: < randelli (--AT--) dis [--DOT--] uniroma1 [--DOT--] it >
 *
 *      Copyright 2010
 *
 *      This file is part of wiiC.
 *
 *      This program 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 Foundation; either version 3 of the License, or
 *      (at your option) any later version.
 *
 *      This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *      $Header$
 *
 */

/**
 *      @file
 *      @brief Handles device I/O for Mac.
 */
#ifdef __APPLE__

#import "io_mac.h"

// Used just to retrieve max num of wiimotes in handler functions
static int max_num_wiimotes = 0;

@implementation WiiSearch

#pragma mark -
#pragma mark WiiSearch
- (id) init
{
        self = [super init];
        foundWiimotes = 0;
        isDiscovering = NO;
        if (self != nil) { 
                /* 
                 * Calling IOBluetoothLocalDeviceAvailable has two advantages:
                 * 1. it sets up a event source in the run loop (bug for C version of the bluetooth api)
                 * 2. it checks for the availability of the BT hardware
                 */
                if (![IOBluetoothHostController defaultController])
                {
                        [self release];
                        self = nil;
                }               
        }

        return self;
}

- (void) dealloc
{       
        inquiry = 0;
        WIIC_DEBUG("Wiimote Discovery released");
        [super dealloc];
}

- (BOOL) isDiscovering
{
        return isDiscovering;
}

- (void) setDiscovering:(BOOL) flag
{
        isDiscovering = flag;
}

- (void) setWiimoteStruct:(wiimote**) wiimote_struct
{
        wiimotes = wiimote_struct;
}

- (int) getFoundWiimotes
{
        return foundWiimotes;
}

- (IOReturn) start:(unsigned int) timeout maxWiimotes:(unsigned int) wiimotesNum
{
        if (![IOBluetoothHostController defaultController]) {
                WIIC_ERROR("Unable to find any bluetooth receiver on your host.");
                return kIOReturnNotAttached;
        }
        
        // If we are currently discovering, we can't start a new discovery right now.
        if ([self isDiscovering]) {
                WIIC_INFO("Wiimote search is already in progress...");
                return kIOReturnSuccess;
        }
        
        [self close];
        maxWiimotes = wiimotesNum;
        foundWiimotes = 0;

        inquiry = [IOBluetoothDeviceInquiry inquiryWithDelegate:self];
        // We set the search timeout
        if(timeout == 0)
                [inquiry setInquiryLength:5];
        else if(timeout < 20)
                [inquiry setInquiryLength:timeout];
        else
                [inquiry setInquiryLength:20];
        [inquiry setSearchCriteria:kBluetoothServiceClassMajorAny majorDeviceClass:WM_DEV_MAJOR_CLASS minorDeviceClass:WM_DEV_MINOR_CLASS];
        [inquiry setUpdateNewDeviceNames:NO];

        IOReturn status = [inquiry start];
        if (status == kIOReturnSuccess) {
                [inquiry retain];
        } else {
                [self close];
                WIIC_ERROR("Unable to search for bluetooth devices.");
        }
        
        return status;
}

- (IOReturn) stop
{
        return [inquiry stop];
}

- (IOReturn) close
{
        IOReturn ret = kIOReturnSuccess;
        
        ret = [inquiry stop];
        [inquiry release];
        inquiry = nil;
        
        WIIC_DEBUG(@"Discovery closed");
        return ret;
}

#pragma mark -
#pragma mark IOBluetoothDeviceInquiry delegates
//*************** HANDLERS FOR WIIC_FIND FOR MACOSX *******************/
- (void) retrieveWiimoteInfo:(IOBluetoothDevice*) device
{       
        // We set the device reference (we must retain it to use it after the search)
        wiimotes[foundWiimotes]->device = [[device retain] getDeviceRef];
        wiimotes[foundWiimotes]->address = (CFStringRef)[[device getAddressString] retain];
        
        // C String (common for Mac and Linux)
        CFStringGetCString(wiimotes[foundWiimotes]->address,wiimotes[foundWiimotes]->bdaddr_str,18,kCFStringEncodingMacRoman);
        
        WIIMOTE_ENABLE_STATE(wiimotes[foundWiimotes], WIIMOTE_STATE_DEV_FOUND);
        WIIC_INFO("Found Wiimote (%s) [id %i].",CFStringGetCStringPtr(wiimotes[foundWiimotes]->address, kCFStringEncodingMacRoman),wiimotes[foundWiimotes]->unid);
        ++foundWiimotes;
}

- (void) deviceInquiryStarted:(IOBluetoothDeviceInquiry*) sender
{
        [self setDiscovering:YES];
}

- (void) deviceInquiryDeviceFound:(IOBluetoothDeviceInquiry *) sender device:(IOBluetoothDevice *) device
{
        if(foundWiimotes < maxWiimotes)
                [self retrieveWiimoteInfo:device];
        else
                [inquiry stop];
}

- (void) deviceInquiryComplete:(IOBluetoothDeviceInquiry*) sender error:(IOReturn) error aborted:(BOOL) aborted
{       
        // The inquiry has completed, we can now process what we have found
        [self setDiscovering:NO];

        // We stop the search because of errors
        if ((error != kIOReturnSuccess) && !aborted) {
                foundWiimotes = 0;
                [self close];
                WIIC_ERROR("Search not completed, because of unexpected errors. This error can be due to a short search timeout.");
                return;
        }
        
        foundWiimotes = [[inquiry foundDevices] count];
}

@end

@implementation WiiConnect
#pragma mark -
#pragma mark WiiConnect
- (id) init
{
        self = [super init];
        receivedMsg = [[NSData alloc] init];
        msgLength = 0;
        _wm = 0;
        isReading = NO;
        timeout = NO;
        disconnecting = NO;
        return self;
}

- (void) dealloc
{       
        WIIC_DEBUG("Wiimote released");
        if(receivedMsg)
                [receivedMsg release];
        receivedMsg = 0;
        _wm = 0;
        [super dealloc];
}

- (byte*) getNextMsg
{
        if(!receivedMsg)
                return 0;

        return (byte*)[receivedMsg bytes];
}

- (void) deleteMsg
{
        if(receivedMsg) {
                [receivedMsg release];
                msgLength = 0;
        }
}

- (BOOL) isDisconnecting
{
        return disconnecting;
}

- (BOOL) isReading
{
        return isReading;
}

- (void) setReading:(BOOL) flag
{
        isReading = flag;
}

- (BOOL) isTimeout
{
        return timeout;
}

- (void) setTimeout:(BOOL) flag
{
        timeout = flag;
}

- (void) startTimerThread
{
        NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
        
        // Timer 
        sleep(1);
        
        [pool drain];
}

- (void) wakeUpMainThreadRunloop:(id)arg
{
    // This method is executed on main thread!
    // It doesn't need to do anything actually, just having it run will
    // make sure the main thread stops running the runloop
}


- (IOBluetoothL2CAPChannel*) openL2CAPChannelWithPSM:(BluetoothL2CAPPSM) psm device:(IOBluetoothDevice*) device delegate:(id) delegate
{
        IOBluetoothL2CAPChannel* channel = nil;
        
        if ([device openL2CAPChannelSync:&channel withPSM:psm delegate:delegate] != kIOReturnSuccess) 
                channel = nil;
        
        return channel;
}

- (IOReturn) connectToWiimote:(wiimote*) wm
{
        IOBluetoothDevice* device = [IOBluetoothDevice withDeviceRef:wm->device];
        IOBluetoothL2CAPChannel* outCh = nil;
        IOBluetoothL2CAPChannel* inCh = nil;
        
        if(!device) {
                WIIC_ERROR("Non existent device or already connected.");
                return kIOReturnBadArgument;
        }
        
        outCh = [self openL2CAPChannelWithPSM:WM_OUTPUT_CHANNEL device:device delegate:self];
        if (!outCh) {
                WIIC_ERROR("Unable to open L2CAP output channel (id %i).", wm->unid);
                [device closeConnection];
                return kIOReturnNotOpen;
        }
        wm->outputCh = [[outCh retain] getL2CAPChannelRef];
        usleep(20000);
        
        inCh = [self openL2CAPChannelWithPSM:WM_INPUT_CHANNEL device:device delegate:self];
        if (!inCh) {
                WIIC_ERROR("Unable to open L2CAP input channel (id %i).", wm->unid);
                [device closeConnection];
                return kIOReturnNotOpen;
        }
        wm->inputCh = [[inCh retain] getL2CAPChannelRef];
        usleep(20000);
        
        IOBluetoothUserNotification* disconnectNotification = [device registerForDisconnectNotification:self selector:@selector(disconnected:fromDevice:)];
        if(!disconnectNotification) {
                WIIC_ERROR("Unable to register disconnection handler (id %i).", wm->unid);
                [device closeConnection];
                return kIOReturnNotOpen;
        }
        
        // We store the reference to its relative structure (Used for completing the handshake step)
        _wm = wm;
        
        return kIOReturnSuccess;
}

#pragma mark -
#pragma mark IOBluetoothL2CAPChannel delegates
- (void) disconnected:(IOBluetoothUserNotification*) notification fromDevice:(IOBluetoothDevice*) device
{
        [self deleteMsg];
        [self setReading:NO];
        disconnecting = YES;
                
        // The wiimote_t struct must be re-initialized due to the disconnection
        wiic_disconnected(_wm) ;        
}

//*************** HANDLERS FOR WIIC_IO_READ FOR MACOSX *******************/
- (void) l2capChannelData:(IOBluetoothL2CAPChannel*) channel data:(byte *) data length:(NSUInteger) length 
{
        // This is done in case the output channel woke up this handler
        if(!data) {
            [self setReading:NO];
                length = 0;
                return;
        }

        /* 
         * This is called if we are receiving data before completing
         * the handshaking, hence before calling wiic_poll
         */
        if(WIIMOTE_IS_SET(_wm, WIIMOTE_STATE_HANDSHAKE))
                propagate_event(_wm, data[1], data+2);

        receivedMsg = [[NSData dataWithBytes:data length:length] retain]; 
        msgLength = length;
        
    // This is done when a message is successfully received. Stop the main loop after reading
    [self setReading:NO];
}

- (unsigned int) getMsgLength
{
        return msgLength;
}

- (void) l2capChannelReconfigured:(IOBluetoothL2CAPChannel*) l2capChannel
{
      //NSLog(@"l2capChannelReconfigured");
}

- (void) l2capChannelWriteComplete:(IOBluetoothL2CAPChannel*) l2capChannel refcon:(void*) refcon status:(IOReturn) error
{
      //NSLog(@"l2capChannelWriteComplete");
}

- (void) l2capChannelQueueSpaceAvailable:(IOBluetoothL2CAPChannel*) l2capChannel
{
      //NSLog(@"l2capChannelQueueSpaceAvailable");
}

- (void) l2capChannelOpenComplete:(IOBluetoothL2CAPChannel*) l2capChannel status:(IOReturn) error
{
        //NSLog(@"l2capChannelOpenComplete (PSM:0x%x)", [l2capChannel getPSM]);
}


@end

#pragma mark -
#pragma mark Wiiuse
/**
 *      @brief Find a wiimote or wiimotes.
 *
 *      @param wm                       An array of wiimote_t structures.
 *      @param max_wiimotes     The number of wiimote structures in \a wm.
 *      @param timeout          The number of seconds before the search times out.
 *
 *      @return The number of wiimotes found.
 *
 *      @see wiimote_connect()
 *
 *      This function will only look for wiimote devices.                                               \n
 *      When a device is found the address in the structures will be set.               \n
 *      You can then call wiimote_connect() to connect to the found                             \n
 *      devices.
 */
int wiic_find(struct wiimote_t** wm, int max_wiimotes, int timeout) 
{
        int found_wiimotes = 0;

        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
        WiiSearch* search = [[WiiSearch alloc] init];
        [search setWiimoteStruct:wm];
        
        if(timeout) { // Single search
                [search start:timeout maxWiimotes:max_wiimotes];
        
                NSRunLoop *theRL = [NSRunLoop currentRunLoop];
                while ([search isDiscovering] && [theRL runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]]);
        
                found_wiimotes = [search getFoundWiimotes];
        }
        else { // Unlimited search
                found_wiimotes = 0;
                while(!found_wiimotes) {
                        [search start:timeout maxWiimotes:max_wiimotes];
        
                        NSRunLoop *theRL = [NSRunLoop currentRunLoop];
                        while ([search isDiscovering] && [theRL runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]]);
        
                        found_wiimotes = [search getFoundWiimotes];     
                }
        }
        
        WIIC_INFO("Found %i Wiimote device(s).", found_wiimotes);
        
        [search release];
        [pool drain];
        
        return found_wiimotes;
}


//*************** HANDLERS FOR WIIC_DISCONNECT FOR MACOSX *******************/
/**
 *      @brief Disconnect a wiimote.
 *
 *      @param wm               Pointer to a wiimote_t structure.
 *
 *      @see wiic_connect()
 *
 *      Note that this will not free the wiimote structure.
 */
void wiic_disconnect(struct wiimote_t* wm) 
{
        IOReturn error;

    if (!wm || !WIIMOTE_IS_CONNECTED(wm))
            return;

        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

        // Input Channel
        if(wm->inputCh) {
                IOBluetoothL2CAPChannel* inCh = [IOBluetoothL2CAPChannel withL2CAPChannelRef:wm->inputCh];
                error = [inCh closeChannel];
                [inCh setDelegate:nil];
                if(error != kIOReturnSuccess) 
                        WIIC_ERROR("Unable to close input channel (id %i).", wm->unid);                 
                usleep(10000);
                [inCh release];
                inCh = nil;
                wm->inputCh = 0;
        }
        
        // Output Channel
        if(wm->outputCh) {
                IOBluetoothL2CAPChannel* outCh = [IOBluetoothL2CAPChannel withL2CAPChannelRef:wm->outputCh];
                error = [outCh closeChannel];
                [outCh setDelegate:nil];
                if(error != kIOReturnSuccess) 
                        WIIC_ERROR("Unable to close output channel (id %i).", wm->unid);                        
                usleep(10000);
                [outCh release];
                outCh = nil;
                wm->outputCh = 0;
        }
        
        // Device
        if(wm->device) {
                IOBluetoothDevice* device = [IOBluetoothDevice withDeviceRef:wm->device];
                error = [device closeConnection];

                if(error != kIOReturnSuccess) 
                        WIIC_ERROR("Unable to close the device connection (id %i).", wm->unid);                 
                usleep(10000);
                [device release];
                device = nil;
                wm->device = 0;
        }
        
        [pool drain];
        
        wm->event = WIIC_NONE;

    WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_CONNECTED);
    WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);
}

/**
 *      @brief Connect to a wiimote with a known address.
 *
 *      @param wm               Pointer to a wiimote_t structure.
 *      @param address  The address of the device to connect to.
 *                                      If NULL, use the address in the struct set by wiic_find().
 *  @param autoreconnect        Re-connects the device in case of unexpected disconnection.
 *
 *      @return 1 on success, 0 on failure
 */
int wiic_connect_single(struct wiimote_t* wm, char* address, int autoreconnect) 
{
        // Skip if already connected or device not found
        if(!wm || WIIMOTE_IS_CONNECTED(wm) || wm->device == 0) {
                WIIC_ERROR("Non existent device or already connected.");
                return 0;       
        }

        // Convert the IP address
        // FIXME - see if it is possible

        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
        WiiConnect* connect = [[[WiiConnect alloc] init] autorelease];
        if([connect connectToWiimote:wm] == kIOReturnSuccess) {
                WIIC_INFO("Connected to wiimote [id %i].", wm->unid);
                // This is stored to retrieve incoming data
                wm->connectionHandler = (void*)([connect retain]);

                // Do the handshake 
                WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_CONNECTED);
                wiic_handshake(wm, NULL, 0);
                wiic_set_report_type(wm);
                
                /* autoreconnect flag */
                wm->autoreconnect = autoreconnect;
                
                [pool drain];
        }
        else {
                [pool drain];
                return 0;
        }
        
        return 1;
}

/**
 *      @brief Connect to a wiimote or wiimotes once an address is known.
 *
 *      @param wm                       An array of wiimote_t structures.
 *      @param wiimotes         The number of wiimote structures in \a wm.
 *      @param autoreconnect    Re-connect to the device in case of unexpected disconnection.
 *
 *      @return The number of wiimotes that successfully connected.
 *
 *      @see wiic_find()
 *      @see wiic_connect_single()
 *      @see wiic_disconnect()
 *
 *      Connect to a number of wiimotes when the address is already set
 *      in the wiimote_t structures.  These addresses are normally set
 *      by the wiic_find() function, but can also be set manually.
 */
int wiic_connect(struct wiimote_t** wm, int wiimotes, int autoreconnect) 
{
        int connected = 0;
        int i = 0;
        
        for (; i < wiimotes; ++i) {
                if(!(wm[i])) {
                        WIIC_ERROR("Trying to connect more Wiimotes than initialized");
                        return;
                }
                
                if (!WIIMOTE_IS_SET(wm[i], WIIMOTE_STATE_DEV_FOUND))
                        // If the device address is not set, skip it 
                        continue;

                if (wiic_connect_single(wm[i], NULL, autoreconnect))
                        ++connected;
        }

        return connected;
}

/**
 *      @brief Load Wii devices registered in the wiimotes.config file.
 *
 *      @param wm                       An array of wiimote_t structures.
 *
 *      @return The number of wiimotes successfully loaded.
 *
 *      @see wiic_find()
 *  @see wiic_connect()
 *      @see wiic_connect_single()
 *      @see wiic_disconnect()
 *
 *      From version 0.53, it is possible to register the MAC address of your 
 *  Wii devices. This allows to automatically load them, without waiting for any
 *  search timeout. To register a new device, go to: <HOME_DIR>/.wiic/ and
 *  edit the file wiimotes.config, by adding the MAC address of the device 
 *  you want to register (one line per MAC address).
 */
int wiic_load(struct wiimote_t** wm) 
{
        int loaded = 0;
        int i = 0;
        char str[200];
        char configPath[100];
        char* tmp = 0;
        
        // Retrieve the HOME environment variable
        tmp = getenv("HOME");
        strcpy(configPath,tmp);
        strncat(configPath,"/.wiic/wiimotes.config",22);

        // Open the config file
        FILE* fd = 0;
        fd = fopen(configPath,"r");
        if(!fd) 
                return loaded;

        // Read line by line
        while(fgets(str,sizeof(str),fd) != NULL && loaded < 1) {
                int len = strlen(str)-1;
        if(str[len] == '\n') 
                str[len] = 0;
                loaded++;
        }
        
        // We initialize the device structure
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
        for (; i < loaded; ++i) {
                NSString* string = [NSString stringWithCString:str encoding:[NSString defaultCStringEncoding]];
                BluetoothDeviceAddress deviceAddr;
                IOBluetoothNSStringToDeviceAddress(string, &deviceAddr);
                IOBluetoothDevice* device = [IOBluetoothDevice withAddress:&deviceAddr];
                wm[i]->device = [[device retain] getDeviceRef];
                wm[i]->address = (CFStringRef)[[device getAddressString] retain];
                WIIMOTE_ENABLE_STATE(wm[i], WIIMOTE_STATE_DEV_FOUND);
                WIIC_INFO("Loaded Wiimote (%s) [id %i].",CFStringGetCStringPtr(wm[i]->address, kCFStringEncodingMacRoman),wm[i]->unid);
        }
        [pool drain];

        return loaded;
}

int wiic_io_read(struct wiimote_t* wm) 
{
    if (!WIIMOTE_IS_SET(wm, WIIMOTE_STATE_CONNECTED))
            return 0;

    /* If this wiimote is not connected, skip it */
    if (!WIIMOTE_IS_CONNECTED(wm))
            return 0;
                        
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

        WiiConnect* deviceHandler = 0;
        deviceHandler = (WiiConnect*)(wm->connectionHandler);

        /* If this wiimote is disconnecting, skip it */
        if (!deviceHandler || [deviceHandler isDisconnecting]) {
                [pool drain];
                return 0;
        }

    // Run the main loop to get bt data
        [deviceHandler setReading:YES];
        [deviceHandler setTimeout:NO];

        // We start the thread which manages the timeout to implement a non-blocking read 
        [NSThread detachNewThreadSelector:@selector(startTimerThread) toTarget:deviceHandler withObject:nil];

        NSRunLoop *theRL = [NSRunLoop currentRunLoop];
        // Two possible events: we receive and incoming message or there is a timeout
        while([deviceHandler isReading] && ![deviceHandler isTimeout]) {
                NSAutoreleasePool *pool_loop = [[NSAutoreleasePool alloc] init]; // This is used for fast release of NSDate, otherwise it leaks
                [theRL runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
                [pool_loop drain];
        }
        
        // In this case we have no incoming data (TIMEOUT)
        if([deviceHandler isTimeout]) {
                [pool drain];
                return 0;
        }

        if(!(wm->connectionHandler)) {
                WIIC_ERROR("Unable to find the connection handler (id %i).", wm->unid);
                [pool drain];
                return 0;
        }

        // Read next message
        byte* buffer = 0;
        unsigned int length = 0;
        if(![deviceHandler isDisconnecting]) {
                buffer = [deviceHandler getNextMsg];
                length = [deviceHandler getMsgLength];
        }

        if(!buffer || !length) {
                [pool drain];
                return 0;
        }

        // Forward to WiiC
        if(length < sizeof(wm->event_buf)) 
                memcpy(wm->event_buf,buffer,length);
        else {
                WIIC_DEBUG("Received data are more than the buffer.... strange! (id %i)", wm->unid);
                memcpy(wm->event_buf,buffer,sizeof(wm->event_buf));
        }

        // Release the consumed message
        [deviceHandler deleteMsg];

        [pool drain];
                
    return 1;
}


int wiic_io_write(struct wiimote_t* wm, byte* buf, int len) 
{
        unsigned int length = (unsigned int)len;
        
        // Small check before writing
        if(!wm || !(wm->outputCh)) {
                WIIC_ERROR("Attempt to write over non-existent channel (id %i).", wm->unid);
                perror("Error Details");
                return 0;
        }

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

        IOBluetoothL2CAPChannel* channel = [IOBluetoothL2CAPChannel withL2CAPChannelRef:wm->outputCh];
    IOReturn error = [channel writeSync:buf length:length];
        if (error != kIOReturnSuccess) 
                WIIC_ERROR("Unable to write over the output channel (id %i).", wm->unid);               
    usleep(10000);
        
    [pool drain];

        return (error == kIOReturnSuccess ? len : 0);
}

#endif