Chris@69: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@69: 
Chris@69: /*
Chris@69:     Sonic Visualiser
Chris@69:     An audio file viewer and annotation editor.
Chris@69:     Centre for Digital Music, Queen Mary, University of London.
Chris@69:     
Chris@69:     This program is free software; you can redistribute it and/or
Chris@69:     modify it under the terms of the GNU General Public License as
Chris@69:     published by the Free Software Foundation; either version 2 of the
Chris@69:     License, or (at your option) any later version.  See the file
Chris@69:     COPYING included with this distribution for more information.
Chris@69: */
Chris@69: 
Chris@69: /*
Chris@69:    This is a modified version of a source file from the 
Chris@69:    Rosegarden MIDI and audio sequencer and notation editor.
Chris@69:    This file copyright 2000-2006 Chris Cannam.
Chris@69: */
Chris@69: 
Chris@69: #include "OSCQueue.h"
Chris@69: 
Chris@69: #include <iostream>
Chris@69: 
Chris@69: #define OSC_MESSAGE_QUEUE_SIZE 1023
Chris@69: 
Chris@69: #ifdef HAVE_LIBLO
Chris@69: 
Chris@69: void
Chris@69: OSCQueue::oscError(int num, const char *msg, const char *path)
Chris@69: {
Chris@69:     std::cerr << "ERROR: OSCQueue::oscError: liblo server error " << num
Chris@69: 	      << " in path " << path << ": " << msg << std::endl;
Chris@69: }
Chris@69: 
Chris@69: int
Chris@69: OSCQueue::oscMessageHandler(const char *path, const char *types, lo_arg **argv,
Chris@69:                             int argc, lo_message, void *user_data)
Chris@69: {
Chris@69:     OSCQueue *queue = static_cast<OSCQueue *>(user_data);
Chris@69: 
Chris@69:     int target;
Chris@69:     int targetData;
Chris@69:     QString method;
Chris@69: 
Chris@69:     if (!queue->parseOSCPath(path, target, targetData, method)) {
Chris@69: 	return 1;
Chris@69:     }
Chris@69: 
Chris@69:     OSCMessage message;
Chris@69:     message.setTarget(target);
Chris@69:     message.setTargetData(targetData);
Chris@69:     message.setMethod(method);
Chris@69: 
Chris@69:     int i = 0;
Chris@69: 
Chris@69:     while (types && i < argc && types[i]) {
Chris@69: 
Chris@69:         char type = types[i];
Chris@69:         lo_arg *arg = argv[i];
Chris@69: 
Chris@69:         switch (type) {
Chris@69:         case 'i': message.addArg(arg->i); break;
Chris@69:         case 'h': message.addArg(arg->h); break;
Chris@69:         case 'f': message.addArg(arg->f); break;
Chris@69:         case 'd': message.addArg(arg->d); break;
Chris@69:         case 'c': message.addArg(arg->c); break;
Chris@69:         case 't': message.addArg(arg->i); break;
Chris@69:         case 's': message.addArg(&arg->s); break;
Chris@69:         default:  std::cerr << "WARNING: OSCQueue::oscMessageHandler: "
Chris@69:                             << "Unsupported OSC type '" << type << "'" 
Chris@69:                             << std::endl;
Chris@69:             break;
Chris@69:         }
Chris@69: 
Chris@69: 	++i;
Chris@69:     }
Chris@69: 
Chris@69:     queue->postMessage(message);
Chris@69:     return 0;
Chris@69: }
Chris@69: 
Chris@69: #endif
Chris@69:    
Chris@69: OSCQueue::OSCQueue() :
Chris@69: #ifdef HAVE_LIBLO
Chris@69:     m_thread(0),
Chris@69: #endif
Chris@69:     m_buffer(OSC_MESSAGE_QUEUE_SIZE)
Chris@69: {
Chris@69: #ifdef HAVE_LIBLO
Chris@69:     m_thread = lo_server_thread_new(NULL, oscError);
Chris@69: 
Chris@69:     lo_server_thread_add_method(m_thread, NULL, NULL,
Chris@69:                                 oscMessageHandler, this);
Chris@69: 
Chris@69:     lo_server_thread_start(m_thread);
Chris@69: 
Chris@69:     std::cout << "OSCQueue::OSCQueue: Base OSC URL is "
Chris@69:               << lo_server_thread_get_url(m_thread) << std::endl;
Chris@69: #endif
Chris@69: }
Chris@69: 
Chris@69: OSCQueue::~OSCQueue()
Chris@69: {
Chris@69: #ifdef HAVE_LIBLO
Chris@69:     if (m_thread) {
Chris@69:         lo_server_thread_stop(m_thread);
Chris@69:     }
Chris@69: #endif
Chris@69: 
Chris@69:     while (m_buffer.getReadSpace() > 0) {
Chris@69:         delete m_buffer.readOne();
Chris@69:     }
Chris@69: }
Chris@69: 
Chris@69: bool
Chris@69: OSCQueue::isOK() const
Chris@69: {
Chris@69: #ifdef HAVE_LIBLO
Chris@69:     return (m_thread != 0);
Chris@69: #else
Chris@69:     return false;
Chris@69: #endif
Chris@69: }
Chris@69: 
Chris@69: QString
Chris@69: OSCQueue::getOSCURL() const
Chris@69: {
Chris@69:     QString url = "";
Chris@69: #ifdef HAVE_LIBLO
Chris@69:     url = lo_server_thread_get_url(m_thread);
Chris@69: #endif
Chris@69:     return url;
Chris@69: }
Chris@69: 
Chris@69: size_t
Chris@69: OSCQueue::getMessagesAvailable() const
Chris@69: {
Chris@69:     return m_buffer.getReadSpace();
Chris@69: }
Chris@69: 
Chris@69: OSCMessage
Chris@69: OSCQueue::readMessage()
Chris@69: {
Chris@69:     OSCMessage *message = m_buffer.readOne();
Chris@69:     OSCMessage rmessage = *message;
Chris@69:     delete message;
Chris@69:     return rmessage;
Chris@69: }
Chris@69: 
Chris@69: void
Chris@69: OSCQueue::postMessage(OSCMessage message)
Chris@69: {
Chris@69:     int count = 0, max = 5;
Chris@69:     while (m_buffer.getWriteSpace() == 0) {
Chris@69:         if (count == max) {
Chris@69:             std::cerr << "ERROR: OSCQueue::postMessage: OSC message queue is full and not clearing -- abandoning incoming message" << std::endl;
Chris@69:             return;
Chris@69:         }
Chris@69:         std::cerr << "WARNING: OSCQueue::postMessage: OSC message queue (capacity " << m_buffer.getSize() << " is full!" << std::endl;
Chris@69:         std::cerr << "Waiting for something to be processed" << std::endl;
Chris@69:         sleep(1);
Chris@69:         count++;
Chris@69:     }
Chris@69: 
Chris@69:     OSCMessage *mp = new OSCMessage(message);
Chris@69:     m_buffer.write(&mp, 1);
Chris@69:     std::cerr << "OSCQueue::postMessage: Posted OSC message: target "
Chris@69:               << message.getTarget() << ", target data " << message.getTargetData()
Chris@69:               << ", method " << message.getMethod().toStdString() << std::endl;
Chris@69:     emit messagesAvailable();
Chris@69: }
Chris@69: 
Chris@69: bool
Chris@69: OSCQueue::parseOSCPath(QString path, int &target, int &targetData,
Chris@69:                        QString &method)
Chris@69: {
Chris@69:     while (path.startsWith("/")) {
Chris@69: 	path = path.right(path.length()-1);
Chris@69:     }
Chris@69: 
Chris@69:     int i = 0;
Chris@69: 
Chris@69:     bool ok = false;
Chris@69:     target = path.section('/', i, i).toInt(&ok);
Chris@69: 
Chris@69:     if (!ok) {
Chris@69:         target = 0;
Chris@69:     } else {
Chris@69:         ++i;
Chris@69:         targetData = path.section('/', i, i).toInt(&ok);
Chris@69:         if (!ok) {
Chris@69:             targetData = 0;
Chris@69:         } else {
Chris@69:             ++i;
Chris@69:         }
Chris@69:     }
Chris@69: 
Chris@69:     method = path.section('/', i, -1);
Chris@69: 
Chris@69:     if (method.contains('/')) {
Chris@69:         std::cerr << "ERROR: OSCQueue::parseOSCPath: malformed path \""
Chris@69:                   << path.toStdString() << "\" (should be target/data/method or "
Chris@69:                   << "target/method or method, where target and data "
Chris@69:                   << "are numeric)" << std::endl;
Chris@69:         return false;
Chris@69:     }
Chris@69: 
Chris@69:     std::cerr << "OSCQueue::parseOSCPath: good path \"" << path.toStdString()
Chris@69:               << "\"" << std::endl;
Chris@69: 
Chris@69:     return true;
Chris@69: }
Chris@69: