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#include "qwmpevents.h"

#include "qwmpglobal.h"

QWmpEvents::QWmpEvents(IUnknown *source, QObject *parent)

    : QObject(parent)

    , m_ref(1)

    , m_connectionPoint(0)

    , m_adviseCookie(0)

{

    HRESULT hr;

    IConnectionPointContainer *container = 0;

    if ((hr = source->QueryInterface(

            IID_IConnectionPointContainer, reinterpret_cast<void **>(&container))) != S_OK) {

        qWarning("No connection point container, %x: %d", hr, qwmp_error_string(hr));

    } else {

        if ((hr = container->FindConnectionPoint(

                __uuidof(IWMPEvents), &m_connectionPoint)) != S_OK) {

            qWarning("No connection point for IWMPEvents %d", hr);

        } else if ((hr = m_connectionPoint->Advise(

                static_cast<IWMPEvents3 *>(this), &m_adviseCookie)) != S_OK) {

            qWarning("Failed to link to connection point, %x, %s", hr, qwmp_error_string(hr));

            m_connectionPoint->Release();

            m_connectionPoint = 0;

        }

        container->Release();

    }

}

QWmpEvents::~QWmpEvents()

{

    if (m_connectionPoint) {

        m_connectionPoint->Unadvise(m_adviseCookie);

        m_connectionPoint->Release();

    }

    Q_ASSERT(m_ref == 1);

}

// IUnknown

HRESULT QWmpEvents::QueryInterface(REFIID riid, void **object)

{

    if (!object) {

        return E_POINTER;

    } else if (riid == __uuidof(IUnknown)

            || riid == __uuidof(IWMPEvents)

            || riid == __uuidof(IWMPEvents2)

            || riid == __uuidof(IWMPEvents3)) {

        *object = static_cast<IWMPEvents3 *>(this);

        AddRef();

        return S_OK;

    } else {

        return E_NOINTERFACE;

    }

}

ULONG QWmpEvents::AddRef()

{

    return InterlockedIncrement(&m_ref);

}

ULONG QWmpEvents::Release()

{

    ULONG ref = InterlockedDecrement(&m_ref);

    Q_ASSERT(ref != 0);

    return ref;

}