view data/osc/OSCQueue.h @ 490:c3fb8258e34d

* Make it possible to import an entire session from an RDF document.
  However, at the moment the timings of events appear to be constrained
  by how far the audio decoder has got through its audio file at the
  time the event is queried -- need to investigate.

/* -*- 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.
*/

#ifndef _OSC_QUEUE_H_
#define _OSC_QUEUE_H_

#include "OSCMessage.h"

#include "base/RingBuffer.h"

#include <QObject>

#ifdef HAVE_LIBLO
#include <lo/lo.h>
#endif

class OSCQueue : public QObject
{
    Q_OBJECT

public:
    OSCQueue();
    virtual ~OSCQueue();

    bool isOK() const;

    bool isEmpty() const { return getMessagesAvailable() == 0; }
    size_t getMessagesAvailable() const;
    OSCMessage readMessage();

    QString getOSCURL() const;

signals:
    void messagesAvailable();

protected:
#ifdef HAVE_LIBLO
    lo_server_thread m_thread;

    static void oscError(int, const char *, const char *);
    static int oscMessageHandler(const char *, const char *, lo_arg **,
                                 int, lo_message, void *);
#endif

    void postMessage(OSCMessage);
    bool parseOSCPath(QString path, int &target, int &targetData, QString &method);

    RingBuffer<OSCMessage *> m_buffer;
};

#endif