Problem with qtconcurrent and signal & slots

[angelito870523]

My problem is: I have a class that inherits from QObject and a function object for use within the function mapped to run qtconcurrent but is not emitted any signal the threads while it's running. Sorry for my English.

[wysota]

Please post some code.

[angelito870523]

This is the function that use mapped

Video* Convertir::convertir(Video *v){
    if (!v->getError()) {
        QString nombre_fichero = QDir::tempPath()+"/"+QFileInfo(v->getDireccion().path()).fileName();
 
        connect(proceso,SIGNAL(readyReadStandardError()),SLOT(procesarSalida()),Qt::DirectConnection);
        connect(this,SIGNAL(valorTotal(int)),v->getProgreso(),SLOT(setMaximum(int)),Qt::DirectConnection);
        connect(this,SIGNAL(valorProgreso(int)),v->getProgreso(),SLOT(setValue(int)),Qt::DirectConnection);
 
        QString f_conv =  QFileInfo(nombre_fichero).baseName()+"."+formato;
        QStringList parametros;
        if(formato == "avi" && calidad == "Alta"){
            parametros << "-i"<< nombre_fichero << "-sameq" << "-vcodec" << "mpeg2video" << "-y" << salida+f_conv;
        }else  if(formato == "mpg" && calidad == "Alta"){
            parametros << "-i"<< nombre_fichero << "-sameq" << "-y" << salida+f_conv;
        }else  if(formato == "avi" && calidad == "Baja"){
            parametros << "-i"<< nombre_fichero  << "-vcodec" << "mpeg2video"<< "-y" << salida+f_conv;
        }else
            parametros << "-i"<< nombre_fichero << "-y" << salida+f_conv;
        proceso->start("ffmpeg",parametros);
    }
    return v;
}

Video* Convertir::convertir(Video *v){
    if (!v->getError()) {
        QString nombre_fichero = QDir::tempPath()+"/"+QFileInfo(v->getDireccion().path()).fileName();

        connect(proceso,SIGNAL(readyReadStandardError()),SLOT(procesarSalida()),Qt::DirectConnection);
        connect(this,SIGNAL(valorTotal(int)),v->getProgreso(),SLOT(setMaximum(int)),Qt::DirectConnection);
        connect(this,SIGNAL(valorProgreso(int)),v->getProgreso(),SLOT(setValue(int)),Qt::DirectConnection);

        QString f_conv =  QFileInfo(nombre_fichero).baseName()+"."+formato;
        QStringList parametros;
        if(formato == "avi" && calidad == "Alta"){
            parametros << "-i"<< nombre_fichero << "-sameq" << "-vcodec" << "mpeg2video" << "-y" << salida+f_conv;
        }else  if(formato == "mpg" && calidad == "Alta"){
            parametros << "-i"<< nombre_fichero << "-sameq" << "-y" << salida+f_conv;
        }else  if(formato == "avi" && calidad == "Baja"){
            parametros << "-i"<< nombre_fichero  << "-vcodec" << "mpeg2video"<< "-y" << salida+f_conv;
        }else
            parametros << "-i"<< nombre_fichero << "-y" << salida+f_conv;
        proceso->start("ffmpeg",parametros);
    }
    return v;
}

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This is the function object

class Convierte{
 
public:
    typedef Video* result_type;
    Video* operator()(Video *v){
        Convertir *conv = new Convertir();
        conv->convertir(v);
        return v;
    }
};

class Convierte{

public:
    typedef Video* result_type;
    Video* operator()(Video *v){
        Convertir *conv = new Convertir();
        conv->convertir(v);
        return v;
    }
};

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The first function belongs to the class Convertir and object function is in the Main Window.
Thanks in advance

[wysota]

And what signals are not emitted? How do you know they are not emitted?

[angelito870523]

It does not emit any signals. I tried to use qDebug () to print any message to signal QProcess issued readyReadStandardError, also I emitted any signal in the slot and print any message and nothing. I have no idea. I can not inherit from QObject in the function object because it says that the Q_OBJECT macro is private and can not be copied or something please help me with this. Thank you for your interest.

[wysota]

It does not emit any signals.

"It" meaning what?

I tried to use qDebug () to print any message to signal QProcess issued readyReadStandardError

Are you expecting anything on stderr?

also I emitted any signal in the slot

I don't see your code emitting any signals.

I can not inherit from QObject in the function object because it says that the Q_OBJECT macro is private and can not be copied or something please help me with this.

Can't help you without seeing the code. I can just assume you were trying to copy a QObject based object.

[amleto]

that's a pretty obvious memory leak you have in covierte operator()...