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#include <QtCore/qstring.h>

#include <QtCore/qdebug.h>

#include <QtCore/QFile>

#include "dsserviceplugin.h"

#ifdef QMEDIA_DIRECTSHOW_CAMERA

#include "dscameraservice.h"

#endif

#ifdef QMEDIA_DIRECTSHOW_PLAYER

#include "directshowplayerservice.h"

#endif

#include <qmediaserviceprovider.h>

#ifdef QMEDIA_DIRECTSHOW_CAMERA

#ifndef _STRSAFE_H_INCLUDED_

#include <tchar.h>

#endif

#include <dshow.h>

#include <objbase.h>

#include <initguid.h>

#pragma comment(lib, "strmiids.lib")

#pragma comment(lib, "ole32.lib")

#include <windows.h>

#endif

QStringList DSServicePlugin::keys() const

{

    return QStringList()

#ifdef QMEDIA_DIRECTSHOW_CAMERA

            << QLatin1String(Q_MEDIASERVICE_CAMERA)

#endif

#ifdef QMEDIA_DIRECTSHOW_PLAYER

            << QLatin1String(Q_MEDIASERVICE_MEDIAPLAYER)

#endif

            ;

}

QMediaService* DSServicePlugin::create(QString const& key)

{

#ifdef QMEDIA_DIRECTSHOW_CAMERA

    if (key == QLatin1String(Q_MEDIASERVICE_CAMERA))

        return new DSCameraService;

#endif

#ifdef QMEDIA_DIRECTSHOW_PLAYER

    if (key == QLatin1String(Q_MEDIASERVICE_MEDIAPLAYER))

        return new DirectShowPlayerService;

#endif

    //qDebug() << "unsupported key:" << key;

    return 0;

}

void DSServicePlugin::release(QMediaService *service)

{

    delete service;

}

QList<QByteArray> DSServicePlugin::devices(const QByteArray &service) const

{

#ifdef QMEDIA_DIRECTSHOW_CAMERA

    if (service == Q_MEDIASERVICE_CAMERA) {

        if (m_cameraDevices.isEmpty())

            updateDevices();

        return m_cameraDevices;

    }

#endif

    return QList<QByteArray>();

}

QString DSServicePlugin::deviceDescription(const QByteArray &service, const QByteArray &device)

{

#ifdef QMEDIA_DIRECTSHOW_CAMERA

    if (service == Q_MEDIASERVICE_CAMERA) {

        if (m_cameraDevices.isEmpty())

            updateDevices();

        for (int i=0; i<m_cameraDevices.count(); i++)

            if (m_cameraDevices[i] == device)

                return m_cameraDescriptions[i];

    }

#endif

    return QString();

}

#ifdef QMEDIA_DIRECTSHOW_CAMERA

void DSServicePlugin::updateDevices() const

{

    m_cameraDevices.clear();

    m_cameraDescriptions.clear();

    CoInitialize(NULL);

    ICreateDevEnum* pDevEnum = NULL;

    IEnumMoniker* pEnum = NULL;

    // Create the System device enumerator

    HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,

                 CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,

		 reinterpret_cast<void**>(&pDevEnum));

    if(SUCCEEDED(hr)) {

        // Create the enumerator for the video capture category

	hr = pDevEnum->CreateClassEnumerator(

	     CLSID_VideoInputDeviceCategory, &pEnum, 0);

	pEnum->Reset();

	// go through and find all video capture devices

	IMoniker* pMoniker = NULL;

	while(pEnum->Next(1, &pMoniker, NULL) == S_OK) {

	    IPropertyBag *pPropBag;

	    hr = pMoniker->BindToStorage(0,0,IID_IPropertyBag,

	         (void**)(&pPropBag));

            if(FAILED(hr)) {

	        pMoniker->Release();

		continue; // skip this one

	    }

	    // Find the description

	    WCHAR str[120];

	    VARIANT varName;

	    varName.vt = VT_BSTR;

            hr = pPropBag->Read(L"FriendlyName", &varName, 0);

	    if(SUCCEEDED(hr)) {

	        StringCchCopyW(str,sizeof(str)/sizeof(str[0]),varName.bstrVal);

		QString temp(QString::fromUtf16((unsigned short*)str));

		m_cameraDevices.append(QString("ds:%1").arg(temp).toLocal8Bit().constData());

	        hr = pPropBag->Read(L"Description", &varName, 0);

	        StringCchCopyW(str,sizeof(str)/sizeof(str[0]),varName.bstrVal);

		QString temp2(QString::fromUtf16((unsigned short*)str));

		m_cameraDescriptions.append(temp2);

	    }

	    pPropBag->Release();

	    pMoniker->Release();

	}

    }

    CoUninitialize();

}

#endif

Q_EXPORT_PLUGIN2(qtmedia_dsengine, DSServicePlugin);