ActiveX interface problem

[skyperhh]

Hello,

i'm using qt 4.7.1 and MSVC++ 2008.

My problem, i can't connect to any interfaces of the windows media player, by activeX.

Small testprogramm

mediaplayer_simple.pro

TEMPLATE      = app
CONFIG       += qaxcontainer
HEADERS       = playerwindow.h
SOURCES       = main.cpp \
                playerwindow.cpp

TEMPLATE      = app
CONFIG       += qaxcontainer
HEADERS       = playerwindow.h
SOURCES       = main.cpp \
                playerwindow.cpp

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playerwindow.h

#ifndef PLAYERWINDOW_H
#define PLAYERWINDOW_H
 
#include <QWidget>
class QAxWidget;
 
class PlayerWindow : public QWidget
{
    public:
        PlayerWindow();
 
    private:
        QAxWidget *wmp;
};
 
#endif

#ifndef PLAYERWINDOW_H
#define PLAYERWINDOW_H

#include <QWidget>
class QAxWidget;

class PlayerWindow : public QWidget
{
    public:
        PlayerWindow();

    private:
        QAxWidget *wmp;
};

#endif

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playerwindow.cpp

#include <QtGui>
#include <QAxWidget>
#include <QAxObject>
 
#include "playerwindow.h"
#include <windows.h>
#include <wmp.h>
 
PlayerWindow::PlayerWindow()
{
    wmp = new QAxWidget(this);
    wmp->setControl("{6BF52A52-394A-11D3-B153-00C04F79FAA6}");
    wmp->setProperty("URL", "D:/clock.avi");
    qDebug("Version Info: %s", qPrintable(wmp->property("versionInfo").toString()));
 
    IWMPMedia *media;
    wmp->queryInterface(QUuid(IID_IWMPMedia), (void **)&media);
    if (media)
    {
        double dur;
        media->get_duration(&dur);
        qDebug("Duration 2 %f", dur);
        media->Release();
    }
    else
    {
        qDebug("Failed");
    }
}

#include <QtGui>
#include <QAxWidget>
#include <QAxObject>

#include "playerwindow.h"
#include <windows.h>
#include <wmp.h>

PlayerWindow::PlayerWindow()
{
    wmp = new QAxWidget(this);
    wmp->setControl("{6BF52A52-394A-11D3-B153-00C04F79FAA6}");
    wmp->setProperty("URL", "D:/clock.avi");
    qDebug("Version Info: %s", qPrintable(wmp->property("versionInfo").toString()));

    IWMPMedia *media;
    wmp->queryInterface(QUuid(IID_IWMPMedia), (void **)&media);
    if (media)
    {
        double dur;
        media->get_duration(&dur);
        qDebug("Duration 2 %f", dur);
        media->Release();
    }
    else
    {
        qDebug("Failed");
    }
}

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main.cpp

#include <QApplication>
#include "playerwindow.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    PlayerWindow playerWin;
    playerWin.show();
    return app.exec();
}

#include <QApplication>
#include "playerwindow.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    PlayerWindow playerWin;
    playerWin.show();
    return app.exec();
}

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Compiling failed, playerwindow.obj:: error: ... extern symbol "_IID_IWMPMedia" in Funktion ""public: __thiscall PlayerWindow::PlayerWindow(void)" (??0PlayerWindow@@QAE@XZ)".

Original german compiler Message -->
Verweis auf nicht aufgelöstes externes Symbol "_IID_IWMPMedia" in Funktion ""public: __thiscall PlayerWindow::PlayerWindow(void)" (??0PlayerWindow@@QAE@XZ)".


Something is wanting by the compiler, but i don't know what.
Anybody an idea?

[javimoya]

wmp.h is has been generated with dumpcpp?

[skyperhh]

Hi javimoya,

no, it's from folder of "Microsoft SDKs\Windows\v6.0A\Include ... the Windows SDK include also the windows media player sdk.
I see, i forgot it at the project file ... testing with path in HEADERS to wmp.h fails.

[javimoya]

in your initial posted example try this:

1)
add this:
#include <InitGuid.h>

2)
change:
wmp->queryInterface(QUuid(IID_IWMPMedia), (void **)&media);
for:
wmp->queryInterface(QUuid(__uuidof(IWMPMedia)), (void **)&media);

it will compile
:-)

---

Added after 14 minutes:

anyway the rest of your code is wrong...

try in this way:

wmp->setControl("{6BF52A52-394A-11D3-B153-00C04F79FAA6}");
wmp->setProperty("URL", "C:/Windows/Media/chimes.wav"); // put your video here
QAxObject* currentMedia= wmp->querySubObject("currentMedia");
 
    IWMPMedia *media;
    currentMedia->queryInterface(QUuid(__uuidof(IWMPMedia)), (void **)&media);
    if (media)
    {
 
        double dur;
        media->get_duration(&dur);
        qDebug("Duration 2 %f", dur);
        media->Release();
    }
    else
    {
        qDebug("Failed");
    }

wmp->setControl("{6BF52A52-394A-11D3-B153-00C04F79FAA6}");
wmp->setProperty("URL", "C:/Windows/Media/chimes.wav"); // put your video here
QAxObject* currentMedia= wmp->querySubObject("currentMedia");

    IWMPMedia *media;
    currentMedia->queryInterface(QUuid(__uuidof(IWMPMedia)), (void **)&media);
    if (media)
    {

        double dur;
        media->get_duration(&dur);
        qDebug("Duration 2 %f", dur);
        media->Release();
    }
    else
    {
        qDebug("Failed");
    }

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[skyperhh]

Hi javimoya,
great work, Thank you very much !!

But, there is also a "small" problem... the values of duration time are zero, did you see the duration time? ... But, I'am thinking, i must wait a little bit and check IWMPCore::get_openState before asking... more tomorrow. :-)

PlayerWindow::PlayerWindow()
{
    wmp = new QAxWidget(this);
    wmp->setControl("{6BF52A52-394A-11D3-B153-00C04F79FAA6}");
    wmp->setProperty("URL", "C:/Windows/Media/notify.wav");
 
    QAxObject* currentMedia = wmp->querySubObject("currentMedia");
    //qDebug("Version Info: %s", qPrintable(wmp->property("versionInfo").toString()));
 
    IWMPMedia *media;
    currentMedia->queryInterface(QUuid(__uuidof(IWMPMedia)), (void **)&media);
    if (media)
    {
        double dur = 1.0;
        HRESULT hr;
        hr = media->get_duration(&dur);
        if (hr == S_OK)
            qDebug("The method succeeded.");
        qDebug("Duration %f", dur);
 
        BSTR pbstrDuration;
 
        hr = media->get_durationString(&pbstrDuration);
        if (hr == S_OK)
            qDebug("The method2 succeeded.");
 
        QString str;
        int len = wcslen( pbstrDuration );
        str.setUnicode( (QChar*)pbstrDuration, len );
 
        qDebug("Duration string %s", qPrintable(str));
 
        media->Release();
    }
    else
    {
        qDebug("Failed");
    }
}

PlayerWindow::PlayerWindow()
{
    wmp = new QAxWidget(this);
    wmp->setControl("{6BF52A52-394A-11D3-B153-00C04F79FAA6}");
    wmp->setProperty("URL", "C:/Windows/Media/notify.wav");

    QAxObject* currentMedia = wmp->querySubObject("currentMedia");
    //qDebug("Version Info: %s", qPrintable(wmp->property("versionInfo").toString()));

    IWMPMedia *media;
    currentMedia->queryInterface(QUuid(__uuidof(IWMPMedia)), (void **)&media);
    if (media)
    {
        double dur = 1.0;
        HRESULT hr;
        hr = media->get_duration(&dur);
        if (hr == S_OK)
            qDebug("The method succeeded.");
        qDebug("Duration %f", dur);

        BSTR pbstrDuration;

        hr = media->get_durationString(&pbstrDuration);
        if (hr == S_OK)
            qDebug("The method2 succeeded.");

        QString str;
        int len = wcslen( pbstrDuration );
        str.setUnicode( (QChar*)pbstrDuration, len );

        qDebug("Duration string %s", qPrintable(str));

        media->Release();
    }
    else
    {
        qDebug("Failed");
    }
}

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