interpreter/preprocessor/faust-0.9.47mr3/architecture/osclib/faust/src/nodes/RootNode.cpp

   1 /*
   2
   3   Copyright (C) 2011 Grame
   4
   5   This library is free software; you can redistribute it and/or
   6   modify it under the terms of the GNU Lesser General Public
   7   License as published by the Free Software Foundation; either
   8   version 2.1 of the License, or (at your option) any later version.
   9
  10   This library is distributed in the hope that it will be useful,
  11   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13   Lesser General Public License for more details.
  14
  15   You should have received a copy of the GNU Lesser General Public
  16   License along with this library; if not, write to the Free Software
  17   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18
  19   Grame Research Laboratory, 9 rue du Garet, 69001 Lyon - France
  20   research@grame.fr
  21
  22 */
  23
  24 #include <string>
  25 #include <sstream>
  26
  27 #include "RootNode.h"
  28 #include "Message.h"
  29 #include "OSCStream.h"
  30 #include "OSCControler.h"
  31 #include "OSCIO.h"
  32
  33 #ifdef WIN32
  34 # include "winsock2.h"
  35 #else
  36 # include "ip/NetworkingUtils.h"
  37 #endif
  38
  39 using namespace std;
  40
  41 namespace oscfaust
  42 {
  43
  44 static const char * kHelloMsg = "hello";
  45
  46
  47 //--------------------------------------------------------------------------
  48 // ip address utility
  49 //--------------------------------------------------------------------------
  50 static string getHostName()
  51 {
  52         char name[512];
  53         int ret = gethostname(name, 512);
  54         if (ret == -1) return "";
  55         return name;
  56 }
  57
  58 string getIP()
  59 {
  60         string name = getHostName();
  61         stringstream ipStr;
  62         if (name.size()) {
  63                 unsigned long ip = GetHostByName(name.c_str());
  64                 ipStr   << ((ip >> 24) & 0xff) << '.'
  65                                 << ((ip >> 16) & 0xff) << '.'
  66                                 << ((ip >> 8) & 0xff) << '.'
  67                                 << (ip & 0xff);
  68         }
  69         return ipStr.str();
  70 }
  71
  72 //--------------------------------------------------------------------------
  73 // signal data handler
  74 //--------------------------------------------------------------------------
  75 bool RootNode::acceptSignal( const Message* msg )
  76 {
  77         bool ret = true;
  78         int n = msg->size();
  79         if (n) {
  80                 float val, * buff = new float[n];
  81                 for (int i = 0; i < n ; i++) {
  82                         if (msg->param(i, val))                 // assumes that it receives float values only
  83                                 buff[i] = val;
  84                         else {                                                  // in case not
  85                                 ret = false;                            // set return code to false
  86                                 break;                                          // and stops reading data
  87                         }
  88                 }
  89                 if (ret) fIO->receive (n, buff);        // call the IO controler receive method with the float data
  90                 delete buff;
  91         }
  92         else ret = false;
  93         return ret;
  94 }
  95
  96 //--------------------------------------------------------------------------
  97 bool RootNode::accept( const Message* msg )
  98 {
  99         string val;
 100         // checks for the 'hello' message first
 101         if ((msg->size() == 1) && (msg->param(0, val)) && (val == kHelloMsg) ) {
 102                 hello (msg->src());
 103                 return true;
 104         }
 105         else if (MessageDriven::accept (msg))   // next checks for standard handlers ('get' for example)
 106                 return true;
 107         else if (fIO)                                                   // when still not handled and if a IO controler is set
 108                 return acceptSignal (msg);                      // try to read signal data
 109         return false;
 110 }
 111
 112 //--------------------------------------------------------------------------
 113 void RootNode::setPorts (int* in, int* out, int* err)
 114 {
 115         fUPDIn  = in;
 116         fUDPOut = out;
 117         fUDPErr = err;
 118 }
 119
 120 //--------------------------------------------------------------------------
 121 void RootNode::hello (unsigned long ipdest ) const
 122 {
 123         if (fUPDIn && fUDPOut && fUDPErr) {                                     // on 'hello' request
 124                 unsigned long savedip = oscout.getAddress();    // saves the current dest IP
 125                 oscout.setAddress(ipdest);                                              // set the destination IP
 126                 // and sends its address + the udp port numbers (in, out and err)
 127                 oscout  << OSCStart(getOSCAddress().c_str()) << getIP() << *fUPDIn << *fUDPOut << *fUDPErr << OSCEnd();
 128                 oscout.setAddress(savedip);                                             // and restores the dest IP
 129         }
 130 }
 131
 132 } // end namespoace