Implement lazy initialization of VideoDevices

As we extend the usage of QPlatformMediaIntegration, adding it in
QSoundEffect, we should make the initialization of not necessary
things lazy.
VideoDevices might run their own cameras tracking pipeline, so we fix
video devices firstly.

Pick-to: 6.5
Change-Id: I8e447452b4b02247c0708569539d7f9c35b47799
Reviewed-by: Jøger Hansegård <joger.hansegard@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
(cherry picked from commit 2d19467fba0f2ad72d033cfd9b7230cc78d65b7a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit b4a22952e1ffc0da9335586e162d654f1567279e)

1 files changed, 7 insertions, 5 deletions

diff --git a/tests/auto/unit/mockbackend/qmockintegration.cpp b/tests/auto/unit/mockbackend/qmockintegration.cpp
index 0cdb21491..8330fcd7f 100644
--- a/tests/auto/unit/mockbackend/qmockintegration.cpp
+++ b/tests/auto/unit/mockbackend/qmockintegration.cpp
@@ -77,13 +77,15 @@ private:
     QList<QCameraDevice> m_cameraDevices;
 };
 
-QMockIntegration::QMockIntegration()
-{
-    m_videoDevices = std::make_unique<QMockVideoDevices>(this);
-}
+QMockIntegration::QMockIntegration() = default;
 
 QMockIntegration::~QMockIntegration() = default;
 
+QPlatformVideoDevices *QMockIntegration::createVideoDevices()
+{
+    return new QMockVideoDevices(this);
+}
+
 QMaybe<QPlatformAudioDecoder *> QMockIntegration::createAudioDecoder(QAudioDecoder *decoder)
 {
     if (m_flags & NoAudioDecoderInterface)
@@ -163,7 +165,7 @@ QMaybe<QPlatformAudioOutput *> QMockIntegration::createAudioOutput(QAudioOutput
 
 void QMockIntegration::addNewCamera()
 {
-    static_cast<QMockVideoDevices &>(*m_videoDevices).addNewCamera();
+    static_cast<QMockVideoDevices *>(videoDevices())->addNewCamera();
 }
 
 bool QMockCamera::simpleCamera = false;