output.h

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// Copyright (c) 2000-2001 Brad Hughes <bhughes@trolltech.com>
//
// Use, modification and distribution is allowed without limitation,
// warranty, or liability of any kind.
//

#ifndef   __output_h
#define   __output_h

class OutputListeners;
class OutputEvent;

#include <qthread.h>
#include <qevent.h>
#include <qptrlist.h>
#include "mythobservable.h"

class QObject;
class Buffer;

namespace MythTV {
class Visual;
}

class MPUBLIC OutputEvent : public MythEvent
{
public:
    enum Type { Playing = (User + 200), Buffering, Info, Paused,
                Stopped, Error };

    OutputEvent(Type t)
        : MythEvent(t), error_msg(0), elasped_seconds(0), written_bytes(0),
          brate(0), freq(0), prec(0), chan(0)
    { ; }

    OutputEvent(long s, unsigned long w, int b, int f, int p, int c)
        : MythEvent(Info), error_msg(0), elasped_seconds(s), written_bytes(w),
          brate(b), freq(f), prec(p), chan(c)
    { ; }

    OutputEvent(const QString &e)
        : MythEvent(Error), elasped_seconds(0), written_bytes(0),
          brate(0), freq(0), prec(0), chan(0)
    {
        error_msg = new QString(e.utf8());
    }


    ~OutputEvent()
    {
        if (error_msg)
            delete error_msg;
    }

    const QString *errorMessage() const { return error_msg; }

    const long &elapsedSeconds() const { return elasped_seconds; }
    const unsigned long &writtenBytes() const { return written_bytes; }
    const int &bitrate() const { return brate; }
    const int &frequency() const { return freq; }
    const int &precision() const { return prec; }
    const int &channels() const { return chan; }

    virtual OutputEvent *clone() { return new OutputEvent(*this); };

private:
    QString *error_msg;

    long elasped_seconds;
    unsigned long written_bytes;
    int brate, freq, prec, chan;
};


class MPUBLIC OutputListeners : public MythObservable
{
public:
    OutputListeners();
    virtual ~OutputListeners();

    void addVisual(MythTV::Visual *);
    void removeVisual(MythTV::Visual *);
    
    QMutex *mutex() { return &mtx; }

    void setBufferSize(unsigned int sz) { bufsize = sz; }
    unsigned int bufferSize() const { return bufsize; }

protected:
    void error(const QString &e);
    void dispatchVisual(uchar *b, unsigned long b_len, 
                       unsigned long written, int chan, int prec);
    void prepareVisuals();

private:
    QMutex mtx;
    QPtrList<MythTV::Visual> visuals;
    
    unsigned int bufsize;
};


#endif // __output_h

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