view data/osc/OSCQueue.cpp @ 1752:6d09d68165a4 by-id

Further review of ById: make IDs only available when adding a model to the ById store, not by querying the item directly. This means any id encountered in the wild must have been added to the store at some point (even if later released), which simplifies reasoning about lifecycles

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    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 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

/*
   This is a modified version of a source file from the 
   Rosegarden MIDI and audio sequencer and notation editor.
   This file copyright 2000-2006 Chris Cannam and QMUL.
*/

#include "OSCQueue.h"

#include "base/Profiler.h"

#include <iostream>
#include <QThread>

#define OSC_MESSAGE_QUEUE_SIZE 1023

#ifdef HAVE_LIBLO

#include <unistd.h>

void
OSCQueue::oscError(int num, const char *msg, const char *path)
{
    cerr << "ERROR: OSCQueue::oscError: liblo server error " << num
              << " in path " << path << ": " << msg << endl;
}

int
OSCQueue::oscMessageHandler(const char *path, const char *types, lo_arg **argv,
                            int argc, lo_message, void *user_data)
{
    OSCQueue *queue = static_cast<OSCQueue *>(user_data);

    int target;
    int targetData;
    QString method;

    if (!queue->parseOSCPath(path, target, targetData, method)) {
        return 1;
    }

    OSCMessage message;
    message.setTarget(target);
    message.setTargetData(targetData);
    message.setMethod(method);

    int i = 0;

    while (types && i < argc && types[i]) {

        char type = types[i];
        lo_arg *arg = argv[i];

        switch (type) {
        case 'i': message.addArg(arg->i); break;
            // This conversion fails to compile in 64-bit environments
            // at present, and we don't use the h type anyway so we
            // can safely omit it
//        case 'h': message.addArg(arg->h); break;
        case 'f': message.addArg(arg->f); break;
        case 'd': message.addArg(arg->d); break;
        case 'c': message.addArg(arg->c); break;
        case 't': message.addArg(arg->i); break;
        case 's': message.addArg(&arg->s); break;
        default:  cerr << "WARNING: OSCQueue::oscMessageHandler: "
                            << "Unsupported OSC type '" << type << "'" 
                            << endl;
            break;
        }

        ++i;
    }

    queue->postMessage(message);
    return 0;
}

#endif
   
OSCQueue::OSCQueue(bool withNetworkPort) :
#ifdef HAVE_LIBLO
    m_thread(nullptr),
#endif
    m_withPort(withNetworkPort),
    m_buffer(OSC_MESSAGE_QUEUE_SIZE)
{
    Profiler profiler("OSCQueue::OSCQueue");

#ifdef HAVE_LIBLO
    if (m_withPort) {
        m_thread = lo_server_thread_new(nullptr, oscError);

        lo_server_thread_add_method(m_thread, nullptr, nullptr,
                                    oscMessageHandler, this);

        lo_server_thread_start(m_thread);

        SVDEBUG << "OSCQueue::OSCQueue: Started OSC thread, URL is "
             << lo_server_thread_get_url(m_thread) << endl;
            
        cout << "OSCQueue::OSCQueue: Base OSC URL is "
             << lo_server_thread_get_url(m_thread) << endl;
    }
#else
    if (m_withPort) {
        SVDEBUG << "OSCQueue::OSCQueue: Note: OSC port support not "
                << "compiled in; not opening port, falling back to "
                << "internal-only queue" << endl;
        m_withPort = false;
    }
#endif
}

OSCQueue::~OSCQueue()
{
#ifdef HAVE_LIBLO
    if (m_thread) {
        lo_server_thread_stop(m_thread);
    }
#endif

    while (m_buffer.getReadSpace() > 0) {
        delete m_buffer.readOne();
    }
}

bool
OSCQueue::isOK() const
{
    if (!m_withPort) {
        return true;
    } else {
#ifdef HAVE_LIBLO
        return (m_thread != nullptr);
#else
        return false;
#endif
    }
}

QString
OSCQueue::getOSCURL() const
{
    QString url = "";
#ifdef HAVE_LIBLO
    if (m_thread) {
        url = lo_server_thread_get_url(m_thread);
    }
#endif
    return url;
}

int
OSCQueue::getMessagesAvailable() const
{
    return m_buffer.getReadSpace();
}

OSCMessage
OSCQueue::readMessage()
{
    OSCMessage *message = m_buffer.readOne();
    OSCMessage rmessage = *message;
    delete message;
    SVDEBUG << "OSCQueue::readMessage: In thread "
            << QThread::currentThreadId() << ": message follows:\n"
            << rmessage.toString() << endl;
    return rmessage;
}

void
OSCQueue::postMessage(OSCMessage message)
{
    int count = 0, max = 5;
    while (m_buffer.getWriteSpace() == 0) {
        if (count == max) {
            cerr << "ERROR: OSCQueue::postMessage: OSC message queue is full and not clearing -- abandoning incoming message" << endl;
            return;
        }
        cerr << "WARNING: OSCQueue::postMessage: OSC message queue (capacity " << m_buffer.getSize() << " is full!" << endl;
        SVDEBUG << "Waiting for something to be processed" << endl;
#ifdef _WIN32
        Sleep(1);
#else
        sleep(1);
#endif
        count++;
    }

    OSCMessage *mp = new OSCMessage(message);
    m_buffer.write(&mp, 1);
    SVDEBUG << "OSCQueue::postMessage: Posted OSC message: target "
            << message.getTarget() << ", target data "
            << message.getTargetData() << ", method "
            << message.getMethod() << endl;
    emit messagesAvailable();
}

bool
OSCQueue::parseOSCPath(QString path, int &target, int &targetData,
                       QString &method)
{
    while (path.startsWith("/")) {
        path = path.right(path.length()-1);
    }

    int i = 0;

    bool ok = false;
    target = path.section('/', i, i).toInt(&ok);

    if (!ok) {
        target = 0;
    } else {
        ++i;
        targetData = path.section('/', i, i).toInt(&ok);
        if (!ok) {
            targetData = 0;
        } else {
            ++i;
        }
    }

    method = path.section('/', i, -1);

    if (method.contains('/')) {
        cerr << "ERROR: OSCQueue::parseOSCPath: malformed path \""
                  << path << "\" (should be target/data/method or "
                  << "target/method or method, where target and data "
                  << "are numeric)" << endl;
        return false;
    }

    SVDEBUG << "OSCQueue::parseOSCPath: good path \"" << path
            << "\"" << endl;

    return true;
}