DirectShow: Introduce nullptr

Apply Fixits by Qt Creator.

Change-Id: Idbd52ceaac6ee02f23d05f5a9b1ab6d58298b6a5
Reviewed-by: André de la Rocha <andre.rocha@qt.io>
 

35 files changed, 173 insertions, 173 deletions

diff --git a/src/plugins/directshow/camera/dscameracontrol.h b/src/plugins/directshow/camera/dscameracontrol.h
index 2ad737008..2087623d1 100644
--- a/src/plugins/directshow/camera/dscameracontrol.h
+++ b/src/plugins/directshow/camera/dscameracontrol.h
@@ -52,7 +52,7 @@ class DSCameraControl : public QCameraControl
 {
     Q_OBJECT
 public:
-    DSCameraControl(QObject *parent = 0);
+    DSCameraControl(QObject *parent = nullptr);
     ~DSCameraControl() override;
 
     QCamera::State state() const override { return m_state; }
diff --git a/src/plugins/directshow/camera/dscameraservice.cpp b/src/plugins/directshow/camera/dscameraservice.cpp
index bb1691c20..ff488cf09 100644
--- a/src/plugins/directshow/camera/dscameraservice.cpp
+++ b/src/plugins/directshow/camera/dscameraservice.cpp
@@ -138,14 +138,14 @@ QMediaControl* DSCameraService::requestControl(const char *name)
     if (qstrcmp(name, QImageEncoderControl_iid) == 0)
         return m_imageEncoderControl;
 
-    return 0;
+    return nullptr;
 }
 
 void DSCameraService::releaseControl(QMediaControl *control)
 {
     if (control == m_videoRenderer) {
         delete m_videoRenderer;
-        m_videoRenderer = 0;
+        m_videoRenderer = nullptr;
         return;
     }
 
diff --git a/src/plugins/directshow/camera/dscameraservice.h b/src/plugins/directshow/camera/dscameraservice.h
index 239a9b55e..6ea85b725 100644
--- a/src/plugins/directshow/camera/dscameraservice.h
+++ b/src/plugins/directshow/camera/dscameraservice.h
@@ -64,7 +64,7 @@ class DSCameraService : public QMediaService
     Q_OBJECT
 
 public:
-    DSCameraService(QObject *parent = 0);
+    DSCameraService(QObject *parent = nullptr);
     ~DSCameraService() override;
 
     QMediaControl* requestControl(const char *name) override;
diff --git a/src/plugins/directshow/camera/dscamerasession.cpp b/src/plugins/directshow/camera/dscamerasession.cpp
index c3fa8d226..4bf448c31 100644
--- a/src/plugins/directshow/camera/dscamerasession.cpp
+++ b/src/plugins/directshow/camera/dscamerasession.cpp
@@ -314,10 +314,10 @@ void DSCameraSession::setImageProcessingParameter(
         return;
     }
 
-    IAMVideoProcAmp *pVideoProcAmp = NULL;
+    IAMVideoProcAmp *pVideoProcAmp = nullptr;
     HRESULT hr = m_graphBuilder->FindInterface(
-                NULL,
-                NULL,
+                nullptr,
+                nullptr,
                 m_sourceFilter,
                 IID_IAMVideoProcAmp,
                 reinterpret_cast<void**>(&pVideoProcAmp)
@@ -447,7 +447,7 @@ bool DSCameraSession::startPreview()
 
     QString errorString;
     HRESULT hr = S_OK;
-    IMediaControl* pControl = 0;
+    IMediaControl* pControl = nullptr;
 
     if (!configurePreviewFormat()) {
         errorString = tr("Failed to configure preview format");
@@ -499,7 +499,7 @@ bool DSCameraSession::stopPreview()
         m_previewSampleGrabber->stop();
 
     QString errorString;
-    IMediaControl* pControl = 0;
+    IMediaControl* pControl = nullptr;
     HRESULT hr = m_filterGraph->QueryInterface(IID_IMediaControl,
                                                reinterpret_cast<void**>(&pControl));
     if (FAILED(hr)) {
@@ -685,12 +685,12 @@ bool DSCameraSession::createFilterGraph()
 
     QString errorString;
     HRESULT hr;
-    IMoniker* pMoniker = NULL;
-    ICreateDevEnum* pDevEnum = NULL;
-    IEnumMoniker* pEnum = NULL;
+    IMoniker* pMoniker = nullptr;
+    ICreateDevEnum* pDevEnum = nullptr;
+    IEnumMoniker* pEnum = nullptr;
 
     // Create the filter graph
-    hr = CoCreateInstance(CLSID_FilterGraph,NULL,CLSCTX_INPROC,
+    hr = CoCreateInstance(CLSID_FilterGraph,nullptr,CLSCTX_INPROC,
                           IID_IGraphBuilder, reinterpret_cast<void**>(&m_filterGraph));
     if (FAILED(hr)) {
         errorString = tr("Failed to create filter graph");
@@ -698,7 +698,7 @@ bool DSCameraSession::createFilterGraph()
     }
 
     // Create the capture graph builder
-    hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL, CLSCTX_INPROC,
+    hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, nullptr, CLSCTX_INPROC,
                           IID_ICaptureGraphBuilder2,
                           reinterpret_cast<void**>(&m_graphBuilder));
     if (FAILED(hr)) {
@@ -714,7 +714,7 @@ bool DSCameraSession::createFilterGraph()
     }
 
     // Find the Capture device
-    hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
+    hr = CoCreateInstance(CLSID_SystemDeviceEnum, nullptr,
                           CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
                           reinterpret_cast<void**>(&pDevEnum));
     if (SUCCEEDED(hr)) {
@@ -723,13 +723,13 @@ bool DSCameraSession::createFilterGraph()
         pDevEnum->Release();
         if (S_OK == hr) {
             pEnum->Reset();
-            IMalloc *mallocInterface = 0;
+            IMalloc *mallocInterface = nullptr;
             CoGetMalloc(1, (LPMALLOC*)&mallocInterface);
             //go through and find all video capture devices
-            while (pEnum->Next(1, &pMoniker, NULL) == S_OK) {
+            while (pEnum->Next(1, &pMoniker, nullptr) == S_OK) {
 
-                BSTR strName = 0;
-                hr = pMoniker->GetDisplayName(NULL, NULL, &strName);
+                BSTR strName = nullptr;
+                hr = pMoniker->GetDisplayName(nullptr, nullptr, &strName);
                 if (SUCCEEDED(hr)) {
                     QString output = QString::fromWCharArray(strName);
                     mallocInterface->Free(strName);
@@ -745,14 +745,14 @@ bool DSCameraSession::createFilterGraph()
                 pMoniker->Release();
             }
             mallocInterface->Release();
-            if (NULL == m_sourceFilter)
+            if (nullptr == m_sourceFilter)
             {
                 if (m_sourceDeviceName.contains(QLatin1String("default")))
                 {
                     pEnum->Reset();
                     // still have to loop to discard bind to storage failure case
-                    while (pEnum->Next(1, &pMoniker, NULL) == S_OK) {
-                        IPropertyBag *pPropBag = 0;
+                    while (pEnum->Next(1, &pMoniker, nullptr) == S_OK) {
+                        IPropertyBag *pPropBag = nullptr;
 
                         hr = pMoniker->BindToStorage(nullptr, nullptr, IID_IPropertyBag,
                                                      reinterpret_cast<void**>(&pPropBag));
@@ -763,7 +763,7 @@ bool DSCameraSession::createFilterGraph()
 
                         // No need to get the description, just grab it
 
-                        hr = pMoniker->BindToObject(0, 0, IID_IBaseFilter,
+                        hr = pMoniker->BindToObject(nullptr, nullptr, IID_IBaseFilter,
                                                     reinterpret_cast<void**>(&m_sourceFilter));
                         pPropBag->Release();
                         pMoniker->Release();
@@ -792,7 +792,7 @@ bool DSCameraSession::createFilterGraph()
 
     // Null renderer. Input connected to the sample grabber's output. Simply
     // discard the samples it receives.
-    hr = CoCreateInstance(cLSID_NullRenderer, NULL, CLSCTX_INPROC,
+    hr = CoCreateInstance(cLSID_NullRenderer, nullptr, CLSCTX_INPROC,
                           IID_IBaseFilter, (void**)&m_nullRendererFilter);
     if (FAILED(hr)) {
         errorString = tr("Failed to create null renderer");
@@ -877,7 +877,7 @@ bool DSCameraSession::configurePreviewFormat()
     m_stride = DirectShowMediaType::bytesPerLine(m_previewSurfaceFormat);
 
     HRESULT hr;
-    IAMStreamConfig* pConfig = 0;
+    IAMStreamConfig* pConfig = nullptr;
     hr = m_graphBuilder->FindInterface(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video,
                                        m_sourceFilter, IID_IAMStreamConfig,
                                        reinterpret_cast<void**>(&pConfig));
@@ -910,10 +910,10 @@ void DSCameraSession::updateImageProcessingParametersInfos()
         return;
     }
 
-    IAMVideoProcAmp *pVideoProcAmp = NULL;
+    IAMVideoProcAmp *pVideoProcAmp = nullptr;
     const HRESULT hr = m_graphBuilder->FindInterface(
-                NULL,
-                NULL,
+                nullptr,
+                nullptr,
                 m_sourceFilter,
                 IID_IAMVideoProcAmp,
                 reinterpret_cast<void**>(&pVideoProcAmp)
@@ -1020,10 +1020,10 @@ void DSCameraSession::disconnectGraph()
 {
     // To avoid increasing the memory usage every time the graph is re-connected it's
     // important that all filters are released; also the ones added by the "Intelligent Connect".
-    IEnumFilters *enumFilters = NULL;
+    IEnumFilters *enumFilters = nullptr;
     if (SUCCEEDED(m_filterGraph->EnumFilters(&enumFilters)))  {
-        IBaseFilter *filter = NULL;
-        while (enumFilters->Next(1, &filter, NULL) == S_OK) {
+        IBaseFilter *filter = nullptr;
+        while (enumFilters->Next(1, &filter, nullptr) == S_OK) {
                 m_filterGraph->RemoveFilter(filter);
                 enumFilters->Reset();
                 filter->Release();
@@ -1040,24 +1040,24 @@ static bool qt_frameRateRangeGreaterThan(const QCamera::FrameRateRange &r1, cons
 void DSCameraSession::updateSourceCapabilities()
 {
     HRESULT hr;
-    AM_MEDIA_TYPE *pmt = NULL;
-    VIDEOINFOHEADER *pvi = NULL;
+    AM_MEDIA_TYPE *pmt = nullptr;
+    VIDEOINFOHEADER *pvi = nullptr;
     VIDEO_STREAM_CONFIG_CAPS scc;
-    IAMStreamConfig* pConfig = 0;
+    IAMStreamConfig* pConfig = nullptr;
 
     m_supportedViewfinderSettings.clear();
     m_needsHorizontalMirroring = false;
     m_supportedFormats.clear();
     m_imageProcessingParametersInfos.clear();
 
-    IAMVideoControl *pVideoControl = 0;
+    IAMVideoControl *pVideoControl = nullptr;
     hr = m_graphBuilder->FindInterface(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video,
                                        m_sourceFilter, IID_IAMVideoControl,
                                        reinterpret_cast<void**>(&pVideoControl));
     if (FAILED(hr)) {
         qWarning() << "Failed to get the video control";
     } else {
-        IPin *pPin = 0;
+        IPin *pPin = nullptr;
         if (!DirectShowUtils::getPin(m_sourceFilter, PINDIR_OUTPUT, &pPin, &hr)) {
             qWarning() << "Failed to get the pin for the video control";
         } else {
@@ -1109,12 +1109,12 @@ void DSCameraSession::updateSourceCapabilities()
                 QList<QCamera::FrameRateRange> frameRateRanges;
 
                 if (pVideoControl) {
-                    IPin *pPin = 0;
+                    IPin *pPin = nullptr;
                     if (!DirectShowUtils::getPin(m_sourceFilter, PINDIR_OUTPUT, &pPin, &hr)) {
                         qWarning() << "Failed to get the pin for the video control";
                     } else {
                         long listSize = 0;
-                        LONGLONG *frameRates = 0;
+                        LONGLONG *frameRates = nullptr;
                         SIZE size = { resolution.width(), resolution.height() };
                         if (SUCCEEDED(pVideoControl->GetFrameRateList(pPin, iIndex, size,
                                                                       &listSize, &frameRates))) {
diff --git a/src/plugins/directshow/camera/dscamerasession.h b/src/plugins/directshow/camera/dscamerasession.h
index a19345777..5e7d026c2 100644
--- a/src/plugins/directshow/camera/dscamerasession.h
+++ b/src/plugins/directshow/camera/dscamerasession.h
@@ -84,7 +84,7 @@ class DSCameraSession : public QObject
 {
     Q_OBJECT
 public:
-    DSCameraSession(QObject *parent = 0);
+    DSCameraSession(QObject *parent = nullptr);
     ~DSCameraSession() override;
 
     QCamera::Status status() const { return m_status; }
diff --git a/src/plugins/directshow/camera/dsvideodevicecontrol.cpp b/src/plugins/directshow/camera/dsvideodevicecontrol.cpp
index 2c1fab764..0f08154f1 100644
--- a/src/plugins/directshow/camera/dsvideodevicecontrol.cpp
+++ b/src/plugins/directshow/camera/dsvideodevicecontrol.cpp
@@ -129,10 +129,10 @@ void DSVideoDeviceControl::updateDevices()
 
     deviceList->clear();
 
-    ICreateDevEnum* pDevEnum = NULL;
-    IEnumMoniker* pEnum = NULL;
+    ICreateDevEnum* pDevEnum = nullptr;
+    IEnumMoniker* pEnum = nullptr;
     // Create the System device enumerator
-    HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
+    HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, nullptr,
             CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
             reinterpret_cast<void**>(&pDevEnum));
     if (SUCCEEDED(hr)) {
@@ -142,12 +142,12 @@ void DSVideoDeviceControl::updateDevices()
         if (S_OK == hr) {
             pEnum->Reset();
             // go through and find all video capture devices
-            IMoniker* pMoniker = NULL;
-            IMalloc *mallocInterface = 0;
+            IMoniker* pMoniker = nullptr;
+            IMalloc *mallocInterface = nullptr;
             CoGetMalloc(1, (LPMALLOC*)&mallocInterface);
-            while (pEnum->Next(1, &pMoniker, NULL) == S_OK) {
-                BSTR strName = 0;
-                hr = pMoniker->GetDisplayName(NULL, NULL, &strName);
+            while (pEnum->Next(1, &pMoniker, nullptr) == S_OK) {
+                BSTR strName = nullptr;
+                hr = pMoniker->GetDisplayName(nullptr, nullptr, &strName);
                 if (SUCCEEDED(hr)) {
                     QString output(QString::fromWCharArray(strName));
                     mallocInterface->Free(strName);
@@ -162,7 +162,7 @@ void DSVideoDeviceControl::updateDevices()
                         // Find the description
                         VARIANT varName;
                         varName.vt = VT_BSTR;
-                        hr = pPropBag->Read(L"FriendlyName", &varName, 0);
+                        hr = pPropBag->Read(L"FriendlyName", &varName, nullptr);
                         if (SUCCEEDED(hr)) {
                             output = QString::fromWCharArray(varName.bstrVal);
                         }
diff --git a/src/plugins/directshow/camera/dsvideodevicecontrol.h b/src/plugins/directshow/camera/dsvideodevicecontrol.h
index 26655f431..24a5b61a1 100644
--- a/src/plugins/directshow/camera/dsvideodevicecontrol.h
+++ b/src/plugins/directshow/camera/dsvideodevicecontrol.h
@@ -54,7 +54,7 @@ class DSVideoDeviceControl : public QVideoDeviceSelectorControl
 {
     Q_OBJECT
 public:
-    DSVideoDeviceControl(QObject *parent = 0);
+    DSVideoDeviceControl(QObject *parent = nullptr);
 
     int deviceCount() const override;
     QString deviceName(int index) const override;
diff --git a/src/plugins/directshow/camera/dsvideorenderer.h b/src/plugins/directshow/camera/dsvideorenderer.h
index 96cf74483..a6a1f8103 100644
--- a/src/plugins/directshow/camera/dsvideorenderer.h
+++ b/src/plugins/directshow/camera/dsvideorenderer.h
@@ -50,7 +50,7 @@ class DSVideoRendererControl : public QVideoRendererControl
 {
     Q_OBJECT
 public:
-    DSVideoRendererControl(DSCameraSession* session, QObject *parent = 0);
+    DSVideoRendererControl(DSCameraSession* session, QObject *parent = nullptr);
     ~DSVideoRendererControl() override;
 
     QAbstractVideoSurface *surface() const override;
diff --git a/src/plugins/directshow/common/directshowbasefilter.cpp b/src/plugins/directshow/common/directshowbasefilter.cpp
index fd86cc3da..dfea2460f 100644
--- a/src/plugins/directshow/common/directshowbasefilter.cpp
+++ b/src/plugins/directshow/common/directshowbasefilter.cpp
@@ -53,7 +53,7 @@ DirectShowBaseFilter::~DirectShowBaseFilter()
 {
     if (m_clock) {
         m_clock->Release();
-        m_clock = NULL;
+        m_clock = nullptr;
     }
 }
 
@@ -202,7 +202,7 @@ HRESULT DirectShowBaseFilter::FindPin(LPCWSTR Id, IPin **ppPin)
         }
     }
 
-    *ppPin = 0;
+    *ppPin = nullptr;
     return VFW_E_NOT_FOUND;
 }
 
@@ -212,7 +212,7 @@ HRESULT DirectShowBaseFilter::JoinFilterGraph(IFilterGraph *pGraph, LPCWSTR pNam
 
     m_filterName = QString::fromWCharArray(pName);
     m_graph = pGraph;
-    m_sink = NULL;
+    m_sink = nullptr;
 
     if (m_graph) {
         if (SUCCEEDED(m_graph->QueryInterface(IID_PPV_ARGS(&m_sink))))
diff --git a/src/plugins/directshow/common/directshoweventloop.cpp b/src/plugins/directshow/common/directshoweventloop.cpp
index a848f41e7..a38c26ef4 100644
--- a/src/plugins/directshow/common/directshoweventloop.cpp
+++ b/src/plugins/directshow/common/directshoweventloop.cpp
@@ -66,8 +66,8 @@ public:
 
 DirectShowEventLoop::DirectShowEventLoop(QObject *parent)
     : QObject(parent)
-    , m_eventHandle(::CreateEvent(0, 0, 0, 0))
-    , m_waitHandle(::CreateEvent(0, 0, 0, 0))
+    , m_eventHandle(::CreateEvent(nullptr, 0, 0, nullptr))
+    , m_waitHandle(::CreateEvent(nullptr, 0, 0, nullptr))
 {
 }
 
@@ -138,7 +138,7 @@ void DirectShowEventLoop::processEvents()
         m_postsHead = m_postsHead->next;
 
         if (!m_postsHead)
-            m_postsTail = 0;
+            m_postsTail = nullptr;
 
         locker.unlock();
         QCoreApplication::sendEvent(post->receiver, post->event);
diff --git a/src/plugins/directshow/common/directshoweventloop.h b/src/plugins/directshow/common/directshoweventloop.h
index b9003209e..984bd23a4 100644
--- a/src/plugins/directshow/common/directshoweventloop.h
+++ b/src/plugins/directshow/common/directshoweventloop.h
@@ -54,7 +54,7 @@ class DirectShowEventLoop : public QObject
 {
     Q_OBJECT
 public:
-    DirectShowEventLoop(QObject *parent = 0);
+    DirectShowEventLoop(QObject *parent = nullptr);
     ~DirectShowEventLoop() override;
 
     void wait(QMutex *mutex);
diff --git a/src/plugins/directshow/common/directshowglobal.h b/src/plugins/directshow/common/directshowglobal.h
index 5f391710e..12693e4f1 100644
--- a/src/plugins/directshow/common/directshowglobal.h
+++ b/src/plugins/directshow/common/directshowglobal.h
@@ -53,35 +53,35 @@ QT_END_NAMESPACE
 
 template <typename T> T *com_cast(IUnknown *unknown, const IID &iid)
 {
-    T *iface = 0;
+    T *iface = nullptr;
     return unknown && unknown->QueryInterface(iid, reinterpret_cast<void **>(&iface)) == S_OK
         ? iface
-        : 0;
+        : nullptr;
 }
 
 template <typename T> T *com_new(const IID &clsid)
 {
-    T *object = 0;
+    T *object = nullptr;
     return CoCreateInstance(
             clsid,
-            NULL,
+            nullptr,
             CLSCTX_INPROC_SERVER,
             IID_PPV_ARGS(&object)) == S_OK
         ? object
-        : 0;
+        : nullptr;
 }
 
 template <typename T> T *com_new(const IID &clsid, const IID &iid)
 {
-    T *object = 0;
+    T *object = nullptr;
     return CoCreateInstance(
             clsid,
-            NULL,
+            nullptr,
             CLSCTX_INPROC_SERVER,
             iid,
             reinterpret_cast<void **>(&object)) == S_OK
         ? object
-        : 0;
+        : nullptr;
 }
 
 DEFINE_GUID(MEDIASUBTYPE_I420,
diff --git a/src/plugins/directshow/common/directshowpin.cpp b/src/plugins/directshow/common/directshowpin.cpp
index a9a1d829a..390d410a4 100644
--- a/src/plugins/directshow/common/directshowpin.cpp
+++ b/src/plugins/directshow/common/directshowpin.cpp
@@ -75,11 +75,11 @@ HRESULT DirectShowPin::Connect(IPin *pReceivePin, const AM_MEDIA_TYPE *pmt)
     if (pd == m_direction)
         return VFW_E_INVALID_DIRECTION;
 
-    if (pmt != NULL && DirectShowMediaType::isPartiallySpecified(pmt)) {
+    if (pmt != nullptr && DirectShowMediaType::isPartiallySpecified(pmt)) {
         // If the type is fully specified, use it
         hr = tryConnect(pReceivePin, pmt);
     } else {
-        IEnumMediaTypes *enumMediaTypes = NULL;
+        IEnumMediaTypes *enumMediaTypes = nullptr;
 
         // First, try the receiving pin's preferred types
         if (SUCCEEDED(pReceivePin->EnumMediaTypes(&enumMediaTypes))) {
@@ -107,13 +107,13 @@ HRESULT DirectShowPin::tryMediaTypes(IPin *pin, const AM_MEDIA_TYPE *partialType
     if (FAILED(hr))
         return hr;
 
-    AM_MEDIA_TYPE *mediaType = NULL;
+    AM_MEDIA_TYPE *mediaType = nullptr;
     ULONG mediaCount = 0;
     HRESULT hrFailure = VFW_E_NO_ACCEPTABLE_TYPES;
 
     for (; enumMediaTypes->Next(1, &mediaType, &mediaCount) == S_OK;) {
 
-        if (mediaType && (partialType == NULL || DirectShowMediaType::isCompatible(mediaType, partialType))) {
+        if (mediaType && (partialType == nullptr || DirectShowMediaType::isCompatible(mediaType, partialType))) {
             hr = tryConnect(pin, mediaType);
 
             if (FAILED(hr) && (hr != E_FAIL)
@@ -156,8 +156,8 @@ HRESULT DirectShowPin::tryConnect(IPin *pin, const AM_MEDIA_TYPE *type)
     if (FAILED(hr)) {
         connectionEnded();
         m_peerPin->Release();
-        m_peerPin = NULL;
-        setMediaType(NULL);
+        m_peerPin = nullptr;
+        setMediaType(nullptr);
         return hr;
     }
 
@@ -196,8 +196,8 @@ HRESULT DirectShowPin::ReceiveConnection(IPin *pConnector, const AM_MEDIA_TYPE *
     if (FAILED(hr)) {
         connectionEnded();
         m_peerPin->Release();
-        m_peerPin = NULL;
-        setMediaType(NULL);
+        m_peerPin = nullptr;
+        setMediaType(nullptr);
         return hr;
     }
 
@@ -217,9 +217,9 @@ HRESULT DirectShowPin::Disconnect()
             return hr;
 
         m_peerPin->Release();
-        m_peerPin = NULL;
+        m_peerPin = nullptr;
 
-        setMediaType(NULL);
+        setMediaType(nullptr);
 
         return S_OK;
     }
@@ -234,7 +234,7 @@ HRESULT DirectShowPin::ConnectedTo(IPin **ppPin)
 
     QMutexLocker locker(&m_mutex);
     if (!m_peerPin) {
-        *ppPin = 0;
+        *ppPin = nullptr;
         return VFW_E_NOT_CONNECTED;
     }
     m_peerPin->AddRef();
@@ -390,8 +390,8 @@ HRESULT DirectShowOutputPin::completeConnection(IPin *pin)
     if (!pin)
         return E_POINTER;
 
-    Q_ASSERT(m_inputPin == NULL);
-    Q_ASSERT(m_allocator == NULL);
+    Q_ASSERT(m_inputPin == nullptr);
+    Q_ASSERT(m_allocator == nullptr);
 
     HRESULT hr = pin->QueryInterface(IID_PPV_ARGS(&m_inputPin));
     if (FAILED(hr))
@@ -420,7 +420,7 @@ HRESULT DirectShowOutputPin::completeConnection(IPin *pin)
         }
 
         m_allocator->Release();
-        m_allocator = NULL;
+        m_allocator = nullptr;
     }
 
     // Otherwise, allocate its own allocator
@@ -438,7 +438,7 @@ HRESULT DirectShowOutputPin::completeConnection(IPin *pin)
         }
 
         m_allocator->Release();
-        m_allocator = NULL;
+        m_allocator = nullptr;
     }
 
     return hr;
@@ -452,12 +452,12 @@ HRESULT DirectShowOutputPin::connectionEnded()
             return hr;
 
         m_allocator->Release();
-        m_allocator = NULL;
+        m_allocator = nullptr;
     }
 
     if (m_inputPin) {
         m_inputPin->Release();
-        m_inputPin = NULL;
+        m_inputPin = nullptr;
     }
 
     return S_OK;
@@ -496,7 +496,7 @@ HRESULT DirectShowInputPin::connectionEnded()
             return hr;
 
         m_allocator->Release();
-        m_allocator = NULL;
+        m_allocator = nullptr;
     }
 
     return S_OK;
diff --git a/src/plugins/directshow/common/directshowpin.h b/src/plugins/directshow/common/directshowpin.h
index 419276c9c..bb5a07ad7 100644
--- a/src/plugins/directshow/common/directshowpin.h
+++ b/src/plugins/directshow/common/directshowpin.h
@@ -56,7 +56,7 @@ public:
     virtual ~DirectShowPin();
 
     QString name() const { return m_name; }
-    bool isConnected() const { return m_peerPin != NULL; }
+    bool isConnected() const { return m_peerPin != nullptr; }
 
     virtual bool isMediaTypeSupported(const AM_MEDIA_TYPE *type) = 0;
     virtual QList<DirectShowMediaType> supportedMediaTypes();
diff --git a/src/plugins/directshow/common/directshowsamplegrabber.cpp b/src/plugins/directshow/common/directshowsamplegrabber.cpp
index 80d3f1c16..a9e74f9db 100644
--- a/src/plugins/directshow/common/directshowsamplegrabber.cpp
+++ b/src/plugins/directshow/common/directshowsamplegrabber.cpp
@@ -75,7 +75,7 @@ public:
 
     STDMETHODIMP QueryInterface(REFIID riid, void **ppvObject) override
     {
-        if (NULL == ppvObject)
+        if (nullptr == ppvObject)
             return E_POINTER;
 
         if (riid == IID_IUnknown /*__uuidof(IUnknown) */ ) {
@@ -118,7 +118,7 @@ DirectShowSampleGrabber::DirectShowSampleGrabber(QObject *p)
     : QObject(p)
 {
     // Create sample grabber filter
-    HRESULT hr = CoCreateInstance(cLSID_SampleGrabber, NULL, CLSCTX_INPROC, iID_ISampleGrabber, reinterpret_cast<void **>(&m_sampleGrabber));
+    HRESULT hr = CoCreateInstance(cLSID_SampleGrabber, nullptr, CLSCTX_INPROC, iID_ISampleGrabber, reinterpret_cast<void **>(&m_sampleGrabber));
 
     if (FAILED(hr)) {
         qCWarning(qtDirectShowPlugin, "Failed to create sample grabber");
diff --git a/src/plugins/directshow/common/directshowutils.cpp b/src/plugins/directshow/common/directshowutils.cpp
index d1c1d42ab..21b86926f 100644
--- a/src/plugins/directshow/common/directshowutils.cpp
+++ b/src/plugins/directshow/common/directshowutils.cpp
@@ -117,7 +117,7 @@ bool DirectShowUtils::getPin(IBaseFilter *filter, PIN_DIRECTION pinDirection, IP
 
     enumPins->Reset();
     IPin *nextPin = nullptr;
-    while (enumPins->Next(1, &nextPin, NULL) == S_OK) {
+    while (enumPins->Next(1, &nextPin, nullptr) == S_OK) {
         const ScopedSafeRelease<IPin> releasePin { &nextPin };
         PIN_DIRECTION currentPinDir;
         *hrOut = nextPin->QueryDirection(&currentPinDir);
@@ -300,7 +300,7 @@ bool DirectShowUtils::connectFilters(IGraphBuilder *graph,
     }
 
     IBaseFilter *nextFilter = nullptr;
-    while (S_OK == filters->Next(1, &nextFilter, 0)) {
+    while (S_OK == filters->Next(1, &nextFilter, nullptr)) {
         const ScopedSafeRelease<IBaseFilter> releaseNextFilter { &nextFilter };
         if (nextFilter && findAndConnect(nextFilter))
             return true;
diff --git a/src/plugins/directshow/common/directshowvideobuffer.cpp b/src/plugins/directshow/common/directshowvideobuffer.cpp
index 7f94da97e..fc329f58a 100644
--- a/src/plugins/directshow/common/directshowvideobuffer.cpp
+++ b/src/plugins/directshow/common/directshowvideobuffer.cpp
@@ -64,7 +64,7 @@ uchar *DirectShowVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine
         if (bytesPerLine)
             *bytesPerLine = m_bytesPerLine;
 
-        BYTE *bytes = 0;
+        BYTE *bytes = nullptr;
 
         if (m_sample->GetPointer(&bytes) == S_OK) {
             m_mapMode = mode;
@@ -72,7 +72,7 @@ uchar *DirectShowVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine
             return reinterpret_cast<uchar *>(bytes);
         }
     }
-    return 0;
+    return nullptr;
 }
 
 void DirectShowVideoBuffer::unmap()
diff --git a/src/plugins/directshow/dsserviceplugin.cpp b/src/plugins/directshow/dsserviceplugin.cpp
index 727a11b55..e22bfe93b 100644
--- a/src/plugins/directshow/dsserviceplugin.cpp
+++ b/src/plugins/directshow/dsserviceplugin.cpp
@@ -78,7 +78,7 @@ static int g_refCount = 0;
 void addRefCount()
 {
     if (++g_refCount == 1)
-        CoInitialize(NULL);
+        CoInitialize(nullptr);
 }
 
 void releaseRefCount()
@@ -99,7 +99,7 @@ QMediaService* DSServicePlugin::create(QString const& key)
         return new DirectShowPlayerService;
     }
 
-    return 0;
+    return nullptr;
 }
 
 void DSServicePlugin::release(QMediaService *service)
diff --git a/src/plugins/directshow/player/directshowaudioendpointcontrol.cpp b/src/plugins/directshow/player/directshowaudioendpointcontrol.cpp
index 3af9a5a2a..f4e45cdd8 100644
--- a/src/plugins/directshow/player/directshowaudioendpointcontrol.cpp
+++ b/src/plugins/directshow/player/directshowaudioendpointcontrol.cpp
@@ -81,12 +81,12 @@ QString DirectShowAudioEndpointControl::outputDescription(const QString &name) c
     QString description;
 
     if (IMoniker *moniker = m_devices.value(name, 0)) {
-        IPropertyBag *propertyBag = 0;
+        IPropertyBag *propertyBag = nullptr;
         if (SUCCEEDED(moniker->BindToStorage(
-                0, 0, IID_IPropertyBag, reinterpret_cast<void **>(&propertyBag)))) {
+                nullptr, nullptr, IID_IPropertyBag, reinterpret_cast<void **>(&propertyBag)))) {
             VARIANT name;
             VariantInit(&name);
-            if (SUCCEEDED(propertyBag->Read(L"FriendlyName", &name, 0)))
+            if (SUCCEEDED(propertyBag->Read(L"FriendlyName", &name, nullptr)))
                 description = QString::fromWCharArray(name.bstrVal);
             VariantClear(&name);
             propertyBag->Release();
@@ -115,11 +115,11 @@ void DirectShowAudioEndpointControl::setActiveOutput(const QString &name)
         return;
 
     if (IMoniker *moniker = m_devices.value(name, 0)) {
-        IBaseFilter *filter = 0;
+        IBaseFilter *filter = nullptr;
 
         if (moniker->BindToObject(
                 m_bindContext,
-                0,
+                nullptr,
                 IID_IBaseFilter,
                 reinterpret_cast<void **>(&filter)) == S_OK) {
             m_service->setAudioOutput(filter);
@@ -131,15 +131,15 @@ void DirectShowAudioEndpointControl::setActiveOutput(const QString &name)
 
 void DirectShowAudioEndpointControl::updateEndpoints()
 {
-    IMalloc *oleMalloc = 0;
+    IMalloc *oleMalloc = nullptr;
     if (m_deviceEnumerator && CoGetMalloc(1, &oleMalloc) == S_OK) {
-        IEnumMoniker *monikers = 0;
+        IEnumMoniker *monikers = nullptr;
 
         if (m_deviceEnumerator->CreateClassEnumerator(
                 CLSID_AudioRendererCategory, &monikers, 0) == S_OK) {
-            for (IMoniker *moniker = 0; monikers->Next(1, &moniker, 0) == S_OK; moniker->Release()) {
-                OLECHAR *string = 0;
-                if (moniker->GetDisplayName(m_bindContext, 0, &string) == S_OK) {
+            for (IMoniker *moniker = nullptr; monikers->Next(1, &moniker, nullptr) == S_OK; moniker->Release()) {
+                OLECHAR *string = nullptr;
+                if (moniker->GetDisplayName(m_bindContext, nullptr, &string) == S_OK) {
                     QString deviceId = QString::fromWCharArray(string);
                     oleMalloc->Free(string);
 
diff --git a/src/plugins/directshow/player/directshowaudioendpointcontrol.h b/src/plugins/directshow/player/directshowaudioendpointcontrol.h
index 1004489d4..05c4eb990 100644
--- a/src/plugins/directshow/player/directshowaudioendpointcontrol.h
+++ b/src/plugins/directshow/player/directshowaudioendpointcontrol.h
@@ -52,7 +52,7 @@ class DirectShowAudioEndpointControl : public QAudioOutputSelectorControl
 {
     Q_OBJECT
 public:
-    DirectShowAudioEndpointControl(DirectShowPlayerService *service, QObject *parent = 0);
+    DirectShowAudioEndpointControl(DirectShowPlayerService *service, QObject *parent = nullptr);
     ~DirectShowAudioEndpointControl() override;
 
     QList<QString> availableOutputs() const override;
diff --git a/src/plugins/directshow/player/directshowevrvideowindowcontrol.cpp b/src/plugins/directshow/player/directshowevrvideowindowcontrol.cpp
index 8ef5fd6c6..89bfc1467 100644
--- a/src/plugins/directshow/player/directshowevrvideowindowcontrol.cpp
+++ b/src/plugins/directshow/player/directshowevrvideowindowcontrol.cpp
@@ -58,7 +58,7 @@ IBaseFilter *DirectShowEvrVideoWindowControl::filter()
         m_evrFilter = com_new<IBaseFilter>(clsid_EnhancedVideoRenderer);
         if (!setEvr(m_evrFilter)) {
             m_evrFilter->Release();
-            m_evrFilter = NULL;
+            m_evrFilter = nullptr;
         }
     }
 
diff --git a/src/plugins/directshow/player/directshowevrvideowindowcontrol.h b/src/plugins/directshow/player/directshowevrvideowindowcontrol.h
index 314aee3eb..edbde78d6 100644
--- a/src/plugins/directshow/player/directshowevrvideowindowcontrol.h
+++ b/src/plugins/directshow/player/directshowevrvideowindowcontrol.h
@@ -49,7 +49,7 @@ QT_BEGIN_NAMESPACE
 class DirectShowEvrVideoWindowControl : public EvrVideoWindowControl
 {
 public:
-    DirectShowEvrVideoWindowControl(QObject *parent = 0);
+    DirectShowEvrVideoWindowControl(QObject *parent = nullptr);
     ~DirectShowEvrVideoWindowControl();
 
     IBaseFilter *filter();
diff --git a/src/plugins/directshow/player/directshowioreader.cpp b/src/plugins/directshow/player/directshowioreader.cpp
index 5fff295fa..b903038ea 100644
--- a/src/plugins/directshow/player/directshowioreader.cpp
+++ b/src/plugins/directshow/player/directshowioreader.cpp
@@ -190,21 +190,21 @@ HRESULT DirectShowIOReader::WaitForNext(
             m_readyHead = request->next;
 
             if (!m_readyHead)
-                m_readyTail = 0;
+                m_readyTail = nullptr;
 
             delete request;
 
             return hr;
         }
         if (m_flushing) {
-            *ppSample = 0;
+            *ppSample = nullptr;
             *pdwUser = 0;
 
             return VFW_E_WRONG_STATE;
         }
     } while (m_wait.wait(&m_mutex, dwTimeout));
 
-    *ppSample = 0;
+    *ppSample = nullptr;
     *pdwUser = 0;
 
     return VFW_E_TIMEOUT;
@@ -359,10 +359,10 @@ void DirectShowIOReader::readyRead()
 
             m_pendingHead = m_pendingHead->next;
 
-            m_readyTail->next = 0;
+            m_readyTail->next = nullptr;
 
             if (!m_pendingHead)
-                m_pendingTail = 0;
+                m_pendingTail = nullptr;
 
             if (!m_readyHead)
                 m_readyHead = m_readyTail;
@@ -449,10 +449,10 @@ void DirectShowIOReader::flushRequests()
 
         m_pendingHead = m_pendingHead->next;
 
-        m_readyTail->next = 0;
+        m_readyTail->next = nullptr;
 
         if (!m_pendingHead)
-            m_pendingTail = 0;
+            m_pendingTail = nullptr;
 
         if (!m_readyHead)
             m_readyHead = m_readyTail;
diff --git a/src/plugins/directshow/player/directshowiosource.cpp b/src/plugins/directshow/player/directshowiosource.cpp
index 934ac97f3..5144710b7 100644
--- a/src/plugins/directshow/player/directshowiosource.cpp
+++ b/src/plugins/directshow/player/directshowiosource.cpp
@@ -83,9 +83,9 @@ DirectShowIOSource::DirectShowIOSource(DirectShowEventLoop *loop)
         FALSE,             // bTemporalCompression
         1,                 // lSampleSize
         GUID_NULL,         // formattype
-        0,                 // pUnk
+        nullptr,           // pUnk
         0,                 // cbFormat
-        0,                 // pbFormat
+        nullptr,           // pbFormat
     };
 
     for (const auto &directshowSubtype : directshow_subtypes) {
@@ -143,7 +143,7 @@ HRESULT DirectShowIOSource::QueryInterface(REFIID riid, void **ppvObject)
         m_queriedForAsyncReader = true;
         *ppvObject = static_cast<IAsyncReader *>(m_reader);
     } else {
-        *ppvObject = 0;
+        *ppvObject = nullptr;
 
         return E_NOINTERFACE;
     }
@@ -372,7 +372,7 @@ HRESULT DirectShowIOSource::Connect(IPin *pReceivePin, const AM_MEDIA_TYPE *pmt)
         pReceivePin->Disconnect();
         if (m_allocator) {
             m_allocator->Release();
-            m_allocator = 0;
+            m_allocator = nullptr;
         }
         if (!m_queriedForAsyncReader)
             hr = VFW_E_NO_TRANSPORT;
diff --git a/src/plugins/directshow/player/directshowmetadatacontrol.cpp b/src/plugins/directshow/player/directshowmetadatacontrol.cpp
index c87ce82cf..46674143e 100644
--- a/src/plugins/directshow/player/directshowmetadatacontrol.cpp
+++ b/src/plugins/directshow/player/directshowmetadatacontrol.cpp
@@ -209,7 +209,7 @@ static QString nameForGUIDString(const QString &guid)
 }
 
 typedef HRESULT (WINAPI *q_SHCreateItemFromParsingName)(PCWSTR, IBindCtx *, const GUID&, void **);
-static q_SHCreateItemFromParsingName sHCreateItemFromParsingName = 0;
+static q_SHCreateItemFromParsingName sHCreateItemFromParsingName = nullptr;
 #endif
 
 #if QT_CONFIG(wmsdk)
@@ -299,7 +299,7 @@ static QVariant getValue(IWMHeaderInfo *header, const wchar_t *key)
     WMT_ATTR_DATATYPE type = WMT_TYPE_DWORD;
     WORD size = 0;
 
-    if (header->GetAttributeByName(&streamNumber, key, &type, 0, &size) == S_OK) {
+    if (header->GetAttributeByName(&streamNumber, key, &type, nullptr, &size) == S_OK) {
         switch (type) {
         case WMT_TYPE_DWORD:
             if (size == sizeof(DWORD)) {
@@ -471,7 +471,7 @@ static QString convertBSTR(BSTR *string)
                                        ::SysStringLen(*string));
 
     ::SysFreeString(*string);
-    string = 0;
+    string = nullptr;
 
     return value;
 }
@@ -491,11 +491,11 @@ void DirectShowMetaDataControl::updateMetadata(const QString &fileSrc, QVariantM
     }
 
     if (!fileSrc.isEmpty() && sHCreateItemFromParsingName) {
-        IShellItem2* shellItem = 0;
+        IShellItem2* shellItem = nullptr;
         if (sHCreateItemFromParsingName(reinterpret_cast<const WCHAR*>(fileSrc.utf16()),
-                                        0, IID_PPV_ARGS(&shellItem)) == S_OK) {
+                                        nullptr, IID_PPV_ARGS(&shellItem)) == S_OK) {
 
-            IPropertyStore *pStore = 0;
+            IPropertyStore *pStore = nullptr;
             if (shellItem->GetPropertyStore(GPS_DEFAULT, IID_PPV_ARGS(&pStore)) == S_OK) {
                 DWORD cProps;
                 if (SUCCEEDED(pStore->GetCount(&cProps))) {
@@ -650,17 +650,17 @@ void DirectShowMetaDataControl::updateMetadata(IFilterGraph2 *graph, IBaseFilter
         return;
 #endif
     {
-        IAMMediaContent *content = 0;
+        IAMMediaContent *content = nullptr;
 
         if ((!graph || graph->QueryInterface(
                  IID_IAMMediaContent, reinterpret_cast<void **>(&content)) != S_OK)
                 && (!source || source->QueryInterface(
                         IID_IAMMediaContent, reinterpret_cast<void **>(&content)) != S_OK)) {
-            content = 0;
+            content = nullptr;
         }
 
         if (content) {
-            BSTR string = 0;
+            BSTR string = nullptr;
 
             if (content->get_AuthorName(&string) == S_OK)
                 metadata.insert(QMediaMetaData::Author, convertBSTR(&string));
diff --git a/src/plugins/directshow/player/directshowmetadatacontrol.h b/src/plugins/directshow/player/directshowmetadatacontrol.h
index 36a3ba845..e66127ab3 100644
--- a/src/plugins/directshow/player/directshowmetadatacontrol.h
+++ b/src/plugins/directshow/player/directshowmetadatacontrol.h
@@ -54,7 +54,7 @@ class DirectShowMetaDataControl : public QMetaDataReaderControl
 {
     Q_OBJECT
 public:
-    DirectShowMetaDataControl(QObject *parent = 0);
+    DirectShowMetaDataControl(QObject *parent = nullptr);
     ~DirectShowMetaDataControl() override;
 
     bool isMetaDataAvailable() const override;
diff --git a/src/plugins/directshow/player/directshowplayercontrol.h b/src/plugins/directshow/player/directshowplayercontrol.h
index 7b235b91c..122f5be2f 100644
--- a/src/plugins/directshow/player/directshowplayercontrol.h
+++ b/src/plugins/directshow/player/directshowplayercontrol.h
@@ -55,7 +55,7 @@ class DirectShowPlayerControl : public QMediaPlayerControl
 {
     Q_OBJECT
 public:
-    DirectShowPlayerControl(DirectShowPlayerService *service, QObject *parent = 0);
+    DirectShowPlayerControl(DirectShowPlayerService *service, QObject *parent = nullptr);
     ~DirectShowPlayerControl() override;
 
     QMediaPlayer::State state() const override;
diff --git a/src/plugins/directshow/player/directshowplayerservice.cpp b/src/plugins/directshow/player/directshowplayerservice.cpp
index ad0dfabf8..56a428028 100644
--- a/src/plugins/directshow/player/directshowplayerservice.cpp
+++ b/src/plugins/directshow/player/directshowplayerservice.cpp
@@ -124,7 +124,7 @@ private:
 DirectShowPlayerService::DirectShowPlayerService(QObject *parent)
     : QMediaService(parent)
     , m_loop(qt_directShowEventLoop())
-    , m_taskHandle(::CreateEvent(0, 0, 0, 0))
+    , m_taskHandle(::CreateEvent(nullptr, 0, 0, nullptr))
 {
     m_playerControl = new DirectShowPlayerControl(this);
     m_metaDataControl = new DirectShowMetaDataControl(this);
@@ -150,12 +150,12 @@ DirectShowPlayerService::~DirectShowPlayerService()
 
     if (m_audioOutput) {
         m_audioOutput->Release();
-        m_audioOutput = 0;
+        m_audioOutput = nullptr;
     }
 
     if (m_videoOutput) {
         m_videoOutput->Release();
-        m_videoOutput = 0;
+        m_videoOutput = nullptr;
     }
 
     delete m_playerControl;
@@ -228,7 +228,7 @@ QMediaControl *DirectShowPlayerService::requestControl(const char *name)
         updateVideoProbe();
         return m_videoProbeControl;
     }
-    return 0;
+    return nullptr;
 }
 
 void DirectShowPlayerService::releaseControl(QMediaControl *control)
@@ -237,17 +237,17 @@ void DirectShowPlayerService::releaseControl(QMediaControl *control)
         qWarning("QMediaService::releaseControl():"
                 " Attempted release of null control");
     } else if (control == m_videoRendererControl) {
-        setVideoOutput(0);
+        setVideoOutput(nullptr);
 
         delete m_videoRendererControl;
 
-        m_videoRendererControl = 0;
+        m_videoRendererControl = nullptr;
     } else if (control == m_videoWindowControl) {
-        setVideoOutput(0);
+        setVideoOutput(nullptr);
 
         delete m_videoWindowControl;
 
-        m_videoWindowControl = 0;
+        m_videoWindowControl = nullptr;
     } else if (control == m_audioProbeControl) {
         if (!m_audioProbeControl->deref()) {
             DirectShowAudioProbeControl *old = m_audioProbeControl;
@@ -330,7 +330,7 @@ void DirectShowPlayerService::load(const QMediaContent &media, QIODevice *stream
 
 void DirectShowPlayerService::doSetUrlSource(QMutexLocker *locker)
 {
-    IBaseFilter *source = 0;
+    IBaseFilter *source = nullptr;
 
     HRESULT hr = E_FAIL;
     if (m_url.scheme() == QLatin1String("http") || m_url.scheme() == QLatin1String("https")) {
@@ -343,14 +343,14 @@ void DirectShowPlayerService::doSetUrlSource(QMutexLocker *locker)
 
         if (IFileSourceFilter *fileSource = com_new<IFileSourceFilter>(clsid_WMAsfReader, iid_IFileSourceFilter)) {
             locker->unlock();
-            hr = fileSource->Load(reinterpret_cast<const OLECHAR *>(m_url.toString().utf16()), 0);
+            hr = fileSource->Load(reinterpret_cast<const OLECHAR *>(m_url.toString().utf16()), nullptr);
 
             if (SUCCEEDED(hr)) {
                 source = com_cast<IBaseFilter>(fileSource, IID_IBaseFilter);
 
                 if (!SUCCEEDED(hr = m_graph->AddFilter(source, L"Source")) && source) {
                     source->Release();
-                    source = 0;
+                    source = nullptr;
                 }
             }
             fileSource->Release();
@@ -485,18 +485,18 @@ void DirectShowPlayerService::doRender(QMutexLocker *locker)
     HRESULT renderHr = S_OK;
 
     while (!filters.isEmpty()) {
-        IEnumPins *pins = 0;
+        IEnumPins *pins = nullptr;
         IBaseFilter *filter = filters[filters.size() - 1];
         filters.removeLast();
 
         if (!(m_pendingTasks & ReleaseFilters) && SUCCEEDED(filter->EnumPins(&pins))) {
             int outputs = 0;
-            for (IPin *pin = 0; pins->Next(1, &pin, 0) == S_OK; pin->Release()) {
+            for (IPin *pin = nullptr; pins->Next(1, &pin, nullptr) == S_OK; pin->Release()) {
                 PIN_DIRECTION direction;
                 if (pin->QueryDirection(&direction) == S_OK && direction == PINDIR_OUTPUT) {
                     ++outputs;
 
-                    IPin *peer = 0;
+                    IPin *peer = nullptr;
                     if (pin->ConnectedTo(&peer) == S_OK) {
                         PIN_INFO peerInfo;
                         if (SUCCEEDED(peer->QueryPinInfo(&peerInfo)))
@@ -504,7 +504,7 @@ void DirectShowPlayerService::doRender(QMutexLocker *locker)
                         peer->Release();
                     } else {
                         locker->unlock();
-                        HRESULT hr = graph->RenderEx(pin, /*AM_RENDEREX_RENDERTOEXISTINGRENDERERS*/ 1, 0);
+                        HRESULT hr = graph->RenderEx(pin, /*AM_RENDEREX_RENDERTOEXISTINGRENDERERS*/ 1, nullptr);
                         if (SUCCEEDED(hr)) {
                             rendered = true;
                             m_error = QMediaPlayer::NoError;
@@ -656,13 +656,13 @@ void DirectShowPlayerService::doReleaseGraph(QMutexLocker *locker)
 
     if (m_source) {
         m_source->Release();
-        m_source = 0;
+        m_source = nullptr;
     }
 
-    m_eventHandle = 0;
+    m_eventHandle = nullptr;
 
     m_graph->Release();
-    m_graph = 0;
+    m_graph = nullptr;
 
     if (m_graphBuilder) {
         m_graphBuilder->Release();
@@ -800,17 +800,17 @@ int DirectShowPlayerService::findStreamTypes(IBaseFilter *source) const
     int streamTypes = 0;
 
     while (!filters.isEmpty()) {
-        IEnumPins *pins = 0;
+        IEnumPins *pins = nullptr;
         IBaseFilter *filter = filters[filters.size() - 1];
         filters.removeLast();
 
         if (SUCCEEDED(filter->EnumPins(&pins))) {
-            for (IPin *pin = 0; pins->Next(1, &pin, 0) == S_OK; pin->Release()) {
+            for (IPin *pin = nullptr; pins->Next(1, &pin, nullptr) == S_OK; pin->Release()) {
                 PIN_DIRECTION direction;
                 if (pin->QueryDirection(&direction) == S_OK && direction == PINDIR_OUTPUT) {
                     DirectShowMediaType connectionType;
                     if (SUCCEEDED(pin->ConnectionMediaType(&connectionType))) {
-                        IPin *peer = 0;
+                        IPin *peer = nullptr;
 
                         if (connectionType->majortype == MEDIATYPE_Audio) {
                             streamTypes |= AudioStream;
@@ -843,8 +843,8 @@ int DirectShowPlayerService::findStreamType(IPin *pin) const
         bool audio = false;
         bool other = false;
 
-        for (AM_MEDIA_TYPE *type = 0;
-                types->Next(1, &type, 0) == S_OK;
+        for (AM_MEDIA_TYPE *type = nullptr;
+                types->Next(1, &type, nullptr) == S_OK;
                 DirectShowMediaType::deleteType(type)) {
             if (type->majortype == MEDIATYPE_Audio)
                 audio = true;
@@ -1156,7 +1156,7 @@ void DirectShowPlayerService::doSeek(QMutexLocker *locker)
 
         locker->unlock();
         seeking->SetPositions(
-                &seekPosition, AM_SEEKING_AbsolutePositioning, 0, AM_SEEKING_NoPositioning);
+                &seekPosition, AM_SEEKING_AbsolutePositioning, nullptr, AM_SEEKING_NoPositioning);
         locker->relock();
 
         if (!m_dontCacheNextSeekResult) {
@@ -1182,7 +1182,7 @@ int DirectShowPlayerService::bufferStatus() const
             m_source, IID_IWMReaderAdvanced2)) {
         DWORD percentage = 0;
 
-        reader->GetBufferProgress(&percentage, 0);
+        reader->GetBufferProgress(&percentage, nullptr);
         reader->Release();
 
         return percentage;
@@ -1355,7 +1355,7 @@ void DirectShowPlayerService::doReleaseVideoOutput(QMutexLocker *locker)
         control->Release();
     }
 
-    IBaseFilter *intermediate = 0;
+    IBaseFilter *intermediate = nullptr;
     if (!SUCCEEDED(m_graph->FindFilterByName(L"Color Space Converter", &intermediate))) {
         intermediate = m_videoOutput;
         intermediate->AddRef();
@@ -1627,13 +1627,13 @@ bool DirectShowPlayerService::isConnected(IBaseFilter *filter, PIN_DIRECTION dir
 {
     bool connected = false;
 
-    IEnumPins *pins = 0;
+    IEnumPins *pins = nullptr;
 
     if (SUCCEEDED(filter->EnumPins(&pins))) {
-        for (IPin *pin = 0; pins->Next(1, &pin, 0) == S_OK; pin->Release()) {
+        for (IPin *pin = nullptr; pins->Next(1, &pin, nullptr) == S_OK; pin->Release()) {
             PIN_DIRECTION dir;
             if (SUCCEEDED(pin->QueryDirection(&dir)) && dir == direction) {
-                IPin *peer = 0;
+                IPin *peer = nullptr;
                 if (SUCCEEDED(pin->ConnectedTo(&peer))) {
                     connected = true;
 
@@ -1649,15 +1649,15 @@ bool DirectShowPlayerService::isConnected(IBaseFilter *filter, PIN_DIRECTION dir
 IBaseFilter *DirectShowPlayerService::getConnected(
         IBaseFilter *filter, PIN_DIRECTION direction) const
 {
-    IBaseFilter *connected = 0;
+    IBaseFilter *connected = nullptr;
 
-    IEnumPins *pins = 0;
+    IEnumPins *pins = nullptr;
 
     if (SUCCEEDED(filter->EnumPins(&pins))) {
-        for (IPin *pin = 0; pins->Next(1, &pin, 0) == S_OK; pin->Release()) {
+        for (IPin *pin = nullptr; pins->Next(1, &pin, nullptr) == S_OK; pin->Release()) {
             PIN_DIRECTION dir;
             if (SUCCEEDED(pin->QueryDirection(&dir)) && dir == direction) {
-                IPin *peer = 0;
+                IPin *peer = nullptr;
                 if (SUCCEEDED(pin->ConnectedTo(&peer))) {
                     PIN_INFO info;
 
diff --git a/src/plugins/directshow/player/directshowplayerservice.h b/src/plugins/directshow/player/directshowplayerservice.h
index 329a463ed..69b4b0a6c 100644
--- a/src/plugins/directshow/player/directshowplayerservice.h
+++ b/src/plugins/directshow/player/directshowplayerservice.h
@@ -78,7 +78,7 @@ public:
         VideoStream = 0x02
     };
 
-    DirectShowPlayerService(QObject *parent = 0);
+    DirectShowPlayerService(QObject *parent = nullptr);
     ~DirectShowPlayerService() override;
 
     QMediaControl *requestControl(const char *name) override;
diff --git a/src/plugins/directshow/player/directshowvideorenderercontrol.cpp b/src/plugins/directshow/player/directshowvideorenderercontrol.cpp
index 18eb92189..19be82141 100644
--- a/src/plugins/directshow/player/directshowvideorenderercontrol.cpp
+++ b/src/plugins/directshow/player/directshowvideorenderercontrol.cpp
@@ -80,13 +80,13 @@ void DirectShowVideoRendererControl::setSurface(QAbstractVideoSurface *surface)
     if (m_evrPresenter) {
         m_evrPresenter->setSurface(nullptr);
         m_evrPresenter->Release();
-        m_evrPresenter = 0;
+        m_evrPresenter = nullptr;
     }
 #endif
 
     if (m_filter) {
         m_filter->Release();
-        m_filter = 0;
+        m_filter = nullptr;
     }
 
     m_surface = surface;
@@ -98,9 +98,9 @@ void DirectShowVideoRendererControl::setSurface(QAbstractVideoSurface *surface)
             m_evrPresenter = new EVRCustomPresenter(m_surface);
             if (!m_evrPresenter->isValid() || !qt_evr_setCustomPresenter(m_filter, m_evrPresenter)) {
                 m_filter->Release();
-                m_filter = 0;
+                m_filter = nullptr;
                 m_evrPresenter->Release();
-                m_evrPresenter = 0;
+                m_evrPresenter = nullptr;
             }
         }
 
diff --git a/src/plugins/directshow/player/directshowvideorenderercontrol.h b/src/plugins/directshow/player/directshowvideorenderercontrol.h
index 09d66b137..dcbcadb4b 100644
--- a/src/plugins/directshow/player/directshowvideorenderercontrol.h
+++ b/src/plugins/directshow/player/directshowvideorenderercontrol.h
@@ -58,7 +58,7 @@ class DirectShowVideoRendererControl : public QVideoRendererControl
 {
     Q_OBJECT
 public:
-    DirectShowVideoRendererControl(DirectShowEventLoop *loop, QObject *parent = 0);
+    DirectShowVideoRendererControl(DirectShowEventLoop *loop, QObject *parent = nullptr);
     ~DirectShowVideoRendererControl() override;
 
     QAbstractVideoSurface *surface() const override;
diff --git a/src/plugins/directshow/player/videosurfacefilter.cpp b/src/plugins/directshow/player/videosurfacefilter.cpp
index bb06d1878..8dd18dc1b 100644
--- a/src/plugins/directshow/player/videosurfacefilter.cpp
+++ b/src/plugins/directshow/player/videosurfacefilter.cpp
@@ -224,8 +224,8 @@ VideoSurfaceFilter::VideoSurfaceFilter(QAbstractVideoSurface *surface, DirectSho
     , m_loop(loop)
     , m_surface(surface)
     , m_renderMutex(QMutex::Recursive)
-    , m_renderEvent(CreateEvent(NULL, FALSE, FALSE, NULL))
-    , m_flushEvent(CreateEvent(NULL, TRUE, FALSE, NULL))
+    , m_renderEvent(CreateEvent(nullptr, FALSE, FALSE, nullptr))
+    , m_flushEvent(CreateEvent(nullptr, TRUE, FALSE, nullptr))
 {
     supportedFormatsChanged();
     connect(surface, &QAbstractVideoSurface::supportedFormatsChanged,
@@ -606,7 +606,7 @@ void VideoSurfaceFilter::clearPendingSample()
     if (m_pendingSample) {
         qCDebug(qLcRenderFilter, "clearPendingSample");
         m_pendingSample->Release();
-        m_pendingSample = NULL;
+        m_pendingSample = nullptr;
     }
 }
 
diff --git a/src/plugins/directshow/player/videosurfacefilter.h b/src/plugins/directshow/player/videosurfacefilter.h
index 91f1b28a5..f11d015f1 100644
--- a/src/plugins/directshow/player/videosurfacefilter.h
+++ b/src/plugins/directshow/player/videosurfacefilter.h
@@ -62,7 +62,7 @@ class VideoSurfaceFilter : public QObject
     Q_OBJECT
     COM_REF_MIXIN
 public:
-    VideoSurfaceFilter(QAbstractVideoSurface *surface, DirectShowEventLoop *loop, QObject *parent = 0);
+    VideoSurfaceFilter(QAbstractVideoSurface *surface, DirectShowEventLoop *loop, QObject *parent = nullptr);
     ~VideoSurfaceFilter();
 
     STDMETHODIMP QueryInterface(REFIID riid, void **ppv) override;
diff --git a/src/plugins/directshow/player/vmr9videowindowcontrol.cpp b/src/plugins/directshow/player/vmr9videowindowcontrol.cpp
index 76444be02..63c945622 100644
--- a/src/plugins/directshow/player/vmr9videowindowcontrol.cpp
+++ b/src/plugins/directshow/player/vmr9videowindowcontrol.cpp
@@ -104,7 +104,7 @@ void Vmr9VideoWindowControl::setDisplayRect(const QRect &rect)
         RECT sourceRect = { 0, 0, 0, 0 };
         RECT displayRect = { rect.left(), rect.top(), rect.right() + 1, rect.bottom() + 1 };
 
-        control->GetNativeVideoSize(&sourceRect.right, &sourceRect.bottom, 0, 0);
+        control->GetNativeVideoSize(&sourceRect.right, &sourceRect.bottom, nullptr, nullptr);
 
         if (m_aspectRatioMode == Qt::KeepAspectRatioByExpanding) {
             QSize clippedSize = rect.size();
@@ -173,7 +173,7 @@ QSize Vmr9VideoWindowControl::nativeSize() const
         LONG width;
         LONG height;
 
-        if (control->GetNativeVideoSize(&width, &height, 0, 0) == S_OK)
+        if (control->GetNativeVideoSize(&width, &height, nullptr, nullptr) == S_OK)
             size = QSize(width, height);
         control->Release();
     }
diff --git a/src/plugins/directshow/player/vmr9videowindowcontrol.h b/src/plugins/directshow/player/vmr9videowindowcontrol.h
index c814c2c85..2a6f008f3 100644
--- a/src/plugins/directshow/player/vmr9videowindowcontrol.h
+++ b/src/plugins/directshow/player/vmr9videowindowcontrol.h
@@ -52,7 +52,7 @@ class Vmr9VideoWindowControl : public QVideoWindowControl
 {
     Q_OBJECT
 public:
-    Vmr9VideoWindowControl(QObject *parent = 0);
+    Vmr9VideoWindowControl(QObject *parent = nullptr);
     ~Vmr9VideoWindowControl() override;
 
     IBaseFilter *filter() const { return m_filter; }