Make directshow-plugin available.

No longer include <qedit.h> in directshow-plugin,
which no longer ships in newer SDKs.

Ensure it only provides the camera service if the
WMF-plugin is built by using a different .json-file.

Adapt qcamerabackend-test to use widgets.

Task-number: QTBUG-28047

Change-Id: I22ea441b9edb56ff55bc275dba37c01c77d8dd90
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>

config.tests/directshow/main.cpp

@@ -43,13 +43,6 @@
 #include <d3d9.h>
 #include <vmr9.h>
 
-#pragma include_alias("dxtrans.h","qedit.h")
-#define __IDxtCompositor_INTERFACE_DEFINED__
-#define __IDxtAlphaSetter_INTERFACE_DEFINED__
-#define __IDxtJpeg_INTERFACE_DEFINED__
-#define __IDxtKey_INTERFACE_DEFINED__
-#include <qedit.h>
-
 int main(int, char**)
 {
     return 0;

src/plugins/directshow/camera/dscamerasession.cpp

@@ -656,6 +656,10 @@ HRESULT DSCameraSession::getPin(IBaseFilter *pFilter, PIN_DIRECTION PinDir, IPin
 
 bool DSCameraSession::createFilterGraph()
 {
+    // Previously containered in <qedit.h>.
+    static const IID iID_ISampleGrabber = { 0x6B652FFF, 0x11FE, 0x4fce, { 0x92, 0xAD, 0x02, 0x66, 0xB5, 0xD7, 0xC7, 0x8F } };
+    static const CLSID cLSID_SampleGrabber = { 0xC1F400A0, 0x3F08, 0x11d3, { 0x9F, 0x0B, 0x00, 0x60, 0x08, 0x03, 0x9E, 0x37 } };
+
     HRESULT hr;
     IMoniker* pMoniker = NULL;
     ICreateDevEnum* pDevEnum = NULL;
@@ -752,14 +756,14 @@ bool DSCameraSession::createFilterGraph()
     }
 
     // Sample grabber filter
-    hr = CoCreateInstance(CLSID_SampleGrabber, NULL,CLSCTX_INPROC,
+    hr = CoCreateInstance(cLSID_SampleGrabber, NULL,CLSCTX_INPROC,
                           IID_IBaseFilter, (void**)&pSG_Filter);
     if (FAILED(hr)) {
         qWarning() << "failed to create sample grabber";
         return false;
     }
 
-    hr = pSG_Filter->QueryInterface(IID_ISampleGrabber, (void**)&pSG);
+    hr = pSG_Filter->QueryInterface(iID_ISampleGrabber, (void**)&pSG);
     if (FAILED(hr)) {
         qWarning() << "failed to get sample grabber";
         return false;

src/plugins/directshow/camera/dscamerasession.h

@@ -69,7 +69,6 @@
 #define __IDxtAlphaSetter_INTERFACE_DEFINED__
 #define __IDxtJpeg_INTERFACE_DEFINED__
 #define __IDxtKey_INTERFACE_DEFINED__
-#include <qedit.h>
 
 struct ICaptureGraphBuilder2;
 struct ISampleGrabber;

src/plugins/directshow/directshow.pro

@@ -24,4 +24,5 @@ win32-g++ {
 include(camera/camera.pri)
 
 OTHER_FILES += \
-    directshow.json
+    directshow.json \
+    directshow_camera.json

src/plugins/directshow/directshow_camera.json

@@ -0,0 +1,3 @@
+{
+    "Keys": ["org.qt-project.qt.camera"]
+}

src/plugins/directshow/dsserviceplugin.h

@@ -54,7 +54,13 @@ class DSServicePlugin
     Q_OBJECT
     Q_INTERFACES(QMediaServiceSupportedDevicesInterface)
     Q_INTERFACES(QMediaServiceFeaturesInterface)
+    // The player service provided by the WMF-plugin should preferably be used.
+    // DirectShow should then only provide the camera (see QTBUG-29172, QTBUG-29175).
+#ifdef QMEDIA_DIRECTSHOW_PLAYER
     Q_PLUGIN_METADATA(IID "org.qt-project.qt.mediaserviceproviderfactory/5.0" FILE "directshow.json")
+#else
+    Q_PLUGIN_METADATA(IID "org.qt-project.qt.mediaserviceproviderfactory/5.0" FILE "directshow_camera.json")
+#endif
 
 public:
     QMediaService* create(QString const& key);

tests/auto/integration/multimedia.pro

@@ -12,3 +12,4 @@ SUBDIRS += \
     qsoundeffect \
     qsound
 
+!qtHaveModule(widgets): SUBDIRS -= qcamerabackend

tests/auto/integration/qcamerabackend/qcamerabackend.pro

@@ -1,6 +1,7 @@
 TARGET = tst_qcamerabackend
 
-QT += multimedia-private testlib
+# DirectShow plugin requires widgets.
+QT += multimedia-private widgets testlib
 
 # This is more of a system test
 CONFIG += testcase