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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the Qt Mobility Components.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

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    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

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    29 ** Nokia at qt-info@nokia.com.

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    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QDebug>

    43 #include <QFile>

    44 #include <QtGui/QIcon>

    45 #include "dsvideodevicecontrol.h"

    46 #include "dscamerasession.h"

    47 

    48 #include <tchar.h>

    49 #include <dshow.h>

    50 #include <objbase.h>

    51 #include <initguid.h>

    52 

    53 DSVideoDeviceControl::DSVideoDeviceControl(QObject *parent)

    54     : QVideoDeviceControl(parent)

    55 {

    56     m_session = qobject_cast<DSCameraSession*>(parent);

    57 

    58     devices.clear();

    59     descriptions.clear();

    60 

    61     CoInitialize(NULL);

    62     ICreateDevEnum* pDevEnum = NULL;

    63     IEnumMoniker* pEnum = NULL;

    64     // Create the System device enumerator

    65     HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,

    66             CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,

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

    68     if(SUCCEEDED(hr)) {

    69         // Create the enumerator for the video capture category

    70         hr = pDevEnum->CreateClassEnumerator(

    71                 CLSID_VideoInputDeviceCategory, &pEnum, 0);

    72         pEnum->Reset();

    73         // go through and find all video capture devices

    74         IMoniker* pMoniker = NULL;

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

    76             IPropertyBag *pPropBag;

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

    78                     (void**)(&pPropBag));

    79             if(FAILED(hr)) {

    80                 pMoniker->Release();

    81                 continue; // skip this one

    82             }

    83             // Find the description

    84             WCHAR str[120];

    85             VARIANT varName;

    86             varName.vt = VT_BSTR;

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

    88             if(SUCCEEDED(hr)) {

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

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

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

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

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

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

    95                 descriptions.append(temp2.toLocal8Bit().constData());

    96             }

    97             pPropBag->Release();

    98             pMoniker->Release();

    99         }

   100     }

   101     CoUninitialize();

   102 

   103     selected = 0;

   104 }

   105 

   106 int DSVideoDeviceControl::deviceCount() const

   107 {

   108     return devices.count();

   109 }

   110 

   111 QString DSVideoDeviceControl::deviceName(int index) const

   112 {

   113     if(index >= 0 && index <= devices.count())

   114         return devices.at(index);

   115 

   116     return QString();

   117 }

   118 

   119 QString DSVideoDeviceControl::deviceDescription(int index) const

   120 {

   121     if(index >= 0 && index <= descriptions.count())

   122         return descriptions.at(index);

   123 

   124     return QString();

   125 }

   126 

   127 QIcon DSVideoDeviceControl::deviceIcon(int index) const

   128 {

   129     Q_UNUSED(index)

   130 

   131     return QIcon();

   132 }

   133 

   134 int DSVideoDeviceControl::defaultDevice() const

   135 {

   136     return 0;

   137 }

   138 

   139 int DSVideoDeviceControl::selectedDevice() const

   140 {

   141     return selected;

   142 }

   143 

   144 void DSVideoDeviceControl::setSelectedDevice(int index)

   145 {

   146     if(index >= 0 && index <= devices.count()) {

   147         if (m_session) {

   148             QString device = devices.at(index);

   149             if (device.startsWith("ds:"))

   150                 device.remove(0,3);

   151             m_session->setDevice(device);

   152         }

   153         selected = index;

   154     }

   155 }

   156