strings: use QStringLiteral instead of fromUtf8

This avoids run-time unicode conversions.

Pick-to: 6.5 6.6 6.7
Change-Id: Ief6aa32288b300ee05232e7372b6f701562194fc
Reviewed-by: Jøger Hansegård <joger.hansegard@qt.io>

19 files changed, 45 insertions, 45 deletions

diff --git a/examples/multimedia/player/player.cpp b/examples/multimedia/player/player.cpp
index 771fd45cb..c674554e8 100644
--- a/examples/multimedia/player/player.cpp
+++ b/examples/multimedia/player/player.cpp
@@ -121,7 +121,7 @@ Player::Player(QWidget *parent) : QWidget(parent)
 
 #if !defined(Q_OS_ANDROID) && !defined(Q_OS_IOS)
     m_audioOutputCombo = new QComboBox(this);
-    m_audioOutputCombo->addItem(QString::fromUtf8("Default"), QVariant::fromValue(QAudioDevice()));
+    m_audioOutputCombo->addItem(QStringLiteral("Default"), QVariant::fromValue(QAudioDevice()));
     for (auto &deviceInfo : QMediaDevices::audioOutputs())
         m_audioOutputCombo->addItem(deviceInfo.description(), QVariant::fromValue(deviceInfo));
     connect(m_audioOutputCombo, QOverload<int>::of(&QComboBox::activated), this,
@@ -331,18 +331,18 @@ void Player::tracksChanged()
     m_subtitleTracks->clear();
 
     const auto audioTracks = m_player->audioTracks();
-    m_audioTracks->addItem(QString::fromUtf8("No audio"), -1);
+    m_audioTracks->addItem(QStringLiteral("No audio"), -1);
     for (int i = 0; i < audioTracks.size(); ++i)
         m_audioTracks->addItem(trackName(audioTracks.at(i), i), i);
     m_audioTracks->setCurrentIndex(m_player->activeAudioTrack() + 1);
 
     const auto videoTracks = m_player->videoTracks();
-    m_videoTracks->addItem(QString::fromUtf8("No video"), -1);
+    m_videoTracks->addItem(QStringLiteral("No video"), -1);
     for (int i = 0; i < videoTracks.size(); ++i)
         m_videoTracks->addItem(trackName(videoTracks.at(i), i), i);
     m_videoTracks->setCurrentIndex(m_player->activeVideoTrack() + 1);
 
-    m_subtitleTracks->addItem(QString::fromUtf8("No subtitles"), -1);
+    m_subtitleTracks->addItem(QStringLiteral("No subtitles"), -1);
     const auto subtitleTracks = m_player->subtitleTracks();
     for (int i = 0; i < subtitleTracks.size(); ++i)
         m_subtitleTracks->addItem(trackName(subtitleTracks.at(i), i), i);
diff --git a/examples/multimedia/video/qmlvideo/frequencymonitor.cpp b/examples/multimedia/video/qmlvideo/frequencymonitor.cpp
index 715f1c8ec..d6f1953f6 100644
--- a/examples/multimedia/video/qmlvideo/frequencymonitor.cpp
+++ b/examples/multimedia/video/qmlvideo/frequencymonitor.cpp
@@ -156,7 +156,7 @@ void FrequencyMonitor::notify()
 void FrequencyMonitor::trace()
 {
     Q_D(FrequencyMonitor);
-    const QString value = QString::fromLatin1("instant %1 average %2")
+    const QString value = QStringLiteral("instant %1 average %2")
                                   .arg(d->m_instantaneousFrequency, 0, 'f', 2)
                                   .arg(d->m_averageFrequency, 0, 'f', 2);
     if (d->m_label.isEmpty())
diff --git a/src/multimedia/camera/qcamera.cpp b/src/multimedia/camera/qcamera.cpp
index 8f6b581c9..527b14c25 100644
--- a/src/multimedia/camera/qcamera.cpp
+++ b/src/multimedia/camera/qcamera.cpp
@@ -173,7 +173,7 @@ void QCameraPrivate::init(const QCameraDevice &device)
     control = maybeControl.value();
     cameraDevice = !device.isNull() ? device : QMediaDevices::defaultVideoInput();
     if (cameraDevice.isNull())
-        _q_error(QCamera::CameraError, QString::fromUtf8("No camera detected"));
+        _q_error(QCamera::CameraError, QStringLiteral("No camera detected"));
     control->setCamera(cameraDevice);
     q->connect(control, SIGNAL(activeChanged(bool)), q, SIGNAL(activeChanged(bool)));
     q->connect(control, SIGNAL(error(int,QString)), q, SLOT(_q_error(int,QString)));
diff --git a/src/multimedia/pulseaudio/qaudioengine_pulse.cpp b/src/multimedia/pulseaudio/qaudioengine_pulse.cpp
index 8c3871b21..4116a772a 100644
--- a/src/multimedia/pulseaudio/qaudioengine_pulse.cpp
+++ b/src/multimedia/pulseaudio/qaudioengine_pulse.cpp
@@ -63,7 +63,7 @@ static bool updateDevicesMap(QReadWriteLock &lock, QByteArray defaultDeviceId,
 static void serverInfoCallback(pa_context *context, const pa_server_info *info, void *userdata)
 {
     if (!info) {
-        qWarning() << QString::fromLatin1("Failed to get server information: %s").arg(QString::fromUtf8(pa_strerror(pa_context_errno(context))));
+        qWarning() << QStringLiteral("Failed to get server information: %s").arg(QString::fromUtf8(pa_strerror(pa_context_errno(context))));
         return;
     }
 
@@ -73,7 +73,7 @@ static void serverInfoCallback(pa_context *context, const pa_server_info *info,
         pa_sample_spec_snprint(ss, sizeof(ss), &info->sample_spec);
         pa_channel_map_snprint(cm, sizeof(cm), &info->channel_map);
 
-        qCDebug(qLcPulseAudioEngine) << QString::fromLatin1("User name: %1\n"
+        qCDebug(qLcPulseAudioEngine) << QStringLiteral("User name: %1\n"
                             "Host Name: %2\n"
                             "Server Name: %3\n"
                             "Server Version: %4\n"
@@ -128,7 +128,7 @@ static void sinkInfoCallback(pa_context *context, const pa_sink_info *info, int
     QPulseAudioEngine *pulseEngine = static_cast<QPulseAudioEngine*>(userdata);
 
     if (isLast < 0) {
-        qWarning() << QString::fromLatin1("Failed to get sink information: %s").arg(QString::fromUtf8(pa_strerror(pa_context_errno(context))));
+        qWarning() << QStringLiteral("Failed to get sink information: %s").arg(QString::fromUtf8(pa_strerror(pa_context_errno(context))));
         return;
     }
 
@@ -146,7 +146,7 @@ static void sinkInfoCallback(pa_context *context, const pa_sink_info *info, int
             { PA_SINK_UNLINKED, "UNLINKED" },
         };
 
-        qCDebug(qLcPulseAudioEngine) << QString::fromUtf8("Sink #%1\n"
+        qCDebug(qLcPulseAudioEngine) << QStringLiteral("Sink #%1\n"
                             "\tState: %2\n"
                             "\tName: %3\n"
                             "\tDescription: %4\n"
@@ -180,7 +180,7 @@ static void sourceInfoCallback(pa_context *context, const pa_source_info *info,
             { PA_SOURCE_SUSPENDED, "SUSPENDED" },
             { PA_SOURCE_UNLINKED, "UNLINKED" } };
 
-        qCDebug(qLcPulseAudioEngine) << QString::fromLatin1("Source #%1\n"
+        qCDebug(qLcPulseAudioEngine) << QStringLiteral("Source #%1\n"
                             "\tState: %2\n"
                             "\tName: %3\n"
                             "\tDescription: %4\n"
@@ -375,7 +375,7 @@ void QPulseAudioEngine::prepare()
 
             case PA_CONTEXT_FAILED:
             default:
-                qCritical() << QString::fromLatin1("PulseAudioService: Connection failure: %1")
+                qCritical() << QStringLiteral("PulseAudioService: Connection failure: %1")
                                 .arg(QString::fromUtf8(pa_strerror(pa_context_errno(m_context))));
                 keepGoing = false;
                 ok = false;
diff --git a/src/multimedia/pulseaudio/qpulseaudiosink.cpp b/src/multimedia/pulseaudio/qpulseaudiosink.cpp
index 53d45e0c3..6aedd10de 100644
--- a/src/multimedia/pulseaudio/qpulseaudiosink.cpp
+++ b/src/multimedia/pulseaudio/qpulseaudiosink.cpp
@@ -42,7 +42,7 @@ static void outputStreamStateCallback(pa_stream *stream, void *userdata)
 
     case PA_STREAM_FAILED:
     default:
-        qWarning() << QString::fromLatin1("Stream error: %1")
+        qWarning() << QStringLiteral("Stream error: %1")
                               .arg(QString::fromUtf8(pa_strerror(
                                       pa_context_errno(pa_stream_get_context(stream)))));
         QPulseAudioEngine *pulseEngine = QPulseAudioEngine::instance();
diff --git a/src/multimedia/pulseaudio/qpulseaudiosource.cpp b/src/multimedia/pulseaudio/qpulseaudiosource.cpp
index fe65ce712..659c1d08e 100644
--- a/src/multimedia/pulseaudio/qpulseaudiosource.cpp
+++ b/src/multimedia/pulseaudio/qpulseaudiosource.cpp
@@ -56,7 +56,7 @@ static void inputStreamStateCallback(pa_stream *stream, void *userdata)
     case PA_STREAM_FAILED:
     default:
         const char *errorString = pa_strerror(pa_context_errno(pa_stream_get_context(stream)));
-        qWarning() << QString::fromLatin1("Stream error: %1").arg(QString::fromUtf8(errorString));
+        qWarning() << QStringLiteral("Stream error: %1").arg(QString::fromUtf8(errorString));
         QPulseAudioEngine *pulseEngine = QPulseAudioEngine::instance();
         pa_threaded_mainloop_signal(pulseEngine->mainloop(), 0);
         break;
@@ -371,7 +371,7 @@ qint64 QPulseAudioSource::read(char *data, qint64 len)
         if (pa_stream_peek(m_stream, &audioBuffer, &readLength) < 0) {
             const char *errorString =
                     pa_strerror(pa_context_errno(pa_stream_get_context(m_stream)));
-            qWarning() << QString::fromLatin1("pa_stream_peek() failed: %1")
+            qWarning() << QStringLiteral("pa_stream_peek() failed: %1")
                                   .arg(QString::fromUtf8(errorString));
             pulseEngine->unlock();
             return 0;
diff --git a/src/multimedia/qmediametadata.cpp b/src/multimedia/qmediametadata.cpp
index 9c2b1cf9d..dc238721f 100644
--- a/src/multimedia/qmediametadata.cpp
+++ b/src/multimedia/qmediametadata.cpp
@@ -402,7 +402,7 @@ QString QMediaMetaData::stringValue(QMediaMetaData::Key key) const
         return QMediaFormat::videoCodecName(value.value<QMediaFormat::VideoCodec>());
     case Resolution: {
         QSize size = value.toSize();
-        return QString::fromUtf8("%1 x %2").arg(size.width()).arg(size.height());
+        return QStringLiteral("%1 x %2").arg(size.width()).arg(size.height());
     }
     case ThumbnailImage:
     case CoverArtImage:
diff --git a/src/multimedia/qmediastoragelocation.cpp b/src/multimedia/qmediastoragelocation.cpp
index 26dce3a4c..ccf71b5fa 100644
--- a/src/multimedia/qmediastoragelocation.cpp
+++ b/src/multimedia/qmediastoragelocation.cpp
@@ -34,13 +34,13 @@ QDir QMediaStorageLocation::defaultDirectory(QStandardPaths::StandardLocation ty
 static QString generateFileName(const QDir &dir, const QString &prefix, const QString &extension)
 {
     auto lastMediaIndex = 0;
-    const auto list = dir.entryList({ QString::fromLatin1("%1*.%2").arg(prefix, extension) });
+    const auto list = dir.entryList({ QStringLiteral("%1*.%2").arg(prefix, extension) });
     for (const QString &fileName : list) {
         auto mediaIndex = QStringView{fileName}.mid(prefix.size(), fileName.size() - prefix.size() - extension.size() - 1).toInt();
         lastMediaIndex = qMax(lastMediaIndex, mediaIndex);
     }
 
-    const QString name = QString::fromLatin1("%1%2.%3")
+    const QString name = QStringLiteral("%1%2.%3")
             .arg(prefix)
             .arg(lastMediaIndex + 1, 4, 10, QLatin1Char('0'))
             .arg(extension);
diff --git a/src/multimedia/recording/qcapturablewindow.cpp b/src/multimedia/recording/qcapturablewindow.cpp
index e242cad9e..34b6a1f5d 100644
--- a/src/multimedia/recording/qcapturablewindow.cpp
+++ b/src/multimedia/recording/qcapturablewindow.cpp
@@ -145,7 +145,7 @@ QCapturableWindow::QCapturableWindow(QCapturableWindowPrivate *capturablePrivate
 #ifndef QT_NO_DEBUG_STREAM
 QDebug operator<<(QDebug dbg, const QCapturableWindow &window)
 {
-    dbg << QString::fromUtf8("Capturable window '%1'").arg(window.description());
+    dbg << QStringLiteral("Capturable window '%1'").arg(window.description());
     return dbg;
 }
 #endif
diff --git a/src/multimedia/video/qvideoframe.cpp b/src/multimedia/video/qvideoframe.cpp
index 0126af750..7efb4db36 100644
--- a/src/multimedia/video/qvideoframe.cpp
+++ b/src/multimedia/video/qvideoframe.cpp
@@ -796,12 +796,12 @@ static QString qFormatTimeStamps(qint64 start, qint64 end)
 
     if (onlyOne) {
         if (start > 0)
-            return QString::fromLatin1("@%1:%2:%3.%4")
+            return QStringLiteral("@%1:%2:%3.%4")
                     .arg(start, 1, 10, QLatin1Char('0'))
                     .arg(s_minutes, 2, 10, QLatin1Char('0'))
                     .arg(s_seconds, 2, 10, QLatin1Char('0'))
                     .arg(s_millis, 2, 10, QLatin1Char('0'));
-        return QString::fromLatin1("@%1:%2.%3")
+        return QStringLiteral("@%1:%2.%3")
                 .arg(s_minutes, 2, 10, QLatin1Char('0'))
                 .arg(s_seconds, 2, 10, QLatin1Char('0'))
                 .arg(s_millis, 2, 10, QLatin1Char('0'));
@@ -810,12 +810,12 @@ static QString qFormatTimeStamps(qint64 start, qint64 end)
     if (end == -1) {
         // Similar to start-start, except it means keep displaying it?
         if (start > 0)
-            return QString::fromLatin1("%1:%2:%3.%4 - forever")
+            return QStringLiteral("%1:%2:%3.%4 - forever")
                     .arg(start, 1, 10, QLatin1Char('0'))
                     .arg(s_minutes, 2, 10, QLatin1Char('0'))
                     .arg(s_seconds, 2, 10, QLatin1Char('0'))
                     .arg(s_millis, 2, 10, QLatin1Char('0'));
-        return QString::fromLatin1("%1:%2.%3 - forever")
+        return QStringLiteral("%1:%2.%3 - forever")
                 .arg(s_minutes, 2, 10, QLatin1Char('0'))
                 .arg(s_seconds, 2, 10, QLatin1Char('0'))
                 .arg(s_millis, 2, 10, QLatin1Char('0'));
@@ -829,7 +829,7 @@ static QString qFormatTimeStamps(qint64 start, qint64 end)
     end /= 60;
 
     if (start > 0 || end > 0)
-        return QString::fromLatin1("%1:%2:%3.%4 - %5:%6:%7.%8")
+        return QStringLiteral("%1:%2:%3.%4 - %5:%6:%7.%8")
                 .arg(start, 1, 10, QLatin1Char('0'))
                 .arg(s_minutes, 2, 10, QLatin1Char('0'))
                 .arg(s_seconds, 2, 10, QLatin1Char('0'))
@@ -838,7 +838,7 @@ static QString qFormatTimeStamps(qint64 start, qint64 end)
                 .arg(e_minutes, 2, 10, QLatin1Char('0'))
                 .arg(e_seconds, 2, 10, QLatin1Char('0'))
                 .arg(e_millis, 2, 10, QLatin1Char('0'));
-    return QString::fromLatin1("%1:%2.%3 - %4:%5.%6")
+    return QStringLiteral("%1:%2.%3 - %4:%5.%6")
             .arg(s_minutes, 2, 10, QLatin1Char('0'))
             .arg(s_seconds, 2, 10, QLatin1Char('0'))
             .arg(s_millis, 2, 10, QLatin1Char('0'))
diff --git a/src/multimediaquick/qquickimagecapture.cpp b/src/multimediaquick/qquickimagecapture.cpp
index 08b484562..72dfb78a8 100644
--- a/src/multimediaquick/qquickimagecapture.cpp
+++ b/src/multimediaquick/qquickimagecapture.cpp
@@ -140,9 +140,9 @@ void QQuickImageCapture::saveToFile(const QUrl &location) const
 
 void QQuickImageCapture::_q_imageCaptured(int id, const QImage &preview)
 {
-    QString previewId = QString::fromLatin1("preview_%1").arg(id);
+    QString previewId = QStringLiteral("preview_%1").arg(id);
     QQuickImagePreviewProvider::registerPreview(previewId, preview);
-    m_capturedImagePath = QString::fromLatin1("image://camera/%2").arg(previewId);
+    m_capturedImagePath = QStringLiteral("image://camera/%2").arg(previewId);
     m_lastImage = preview;
     emit previewChanged();
 }
diff --git a/tests/auto/integration/qcamerabackend/tst_qcamerabackend.cpp b/tests/auto/integration/qcamerabackend/tst_qcamerabackend.cpp
index 5fadde1f5..1552131a8 100644
--- a/tests/auto/integration/qcamerabackend/tst_qcamerabackend.cpp
+++ b/tests/auto/integration/qcamerabackend/tst_qcamerabackend.cpp
@@ -575,7 +575,7 @@ void tst_QCameraBackend::testVideoRecording()
 
     // Insert metadata
     QMediaMetaData metaData;
-    metaData.insert(QMediaMetaData::Author, QString::fromUtf8("Author"));
+    metaData.insert(QMediaMetaData::Author, QStringLiteral("Author"));
     metaData.insert(QMediaMetaData::Date, QDateTime::currentDateTime());
     recorder.setMetaData(metaData);
 
@@ -653,9 +653,9 @@ void tst_QCameraBackend::testNativeMetadata()
     // Insert common metadata supported on all platforms
     // Don't use Date, as some backends set that on their own
     QMediaMetaData metaData;
-    metaData.insert(QMediaMetaData::Title, QString::fromUtf8("Title"));
+    metaData.insert(QMediaMetaData::Title, QStringLiteral("Title"));
     metaData.insert(QMediaMetaData::Language, QVariant::fromValue(QLocale::German));
-    metaData.insert(QMediaMetaData::Description, QString::fromUtf8("Description"));
+    metaData.insert(QMediaMetaData::Description, QStringLiteral("Description"));
 
     recorder.setMetaData(metaData);
 
diff --git a/tests/auto/integration/qscreencapturebackend/tst_qscreencapturebackend.cpp b/tests/auto/integration/qscreencapturebackend/tst_qscreencapturebackend.cpp
index 217f3dfc7..9e8bfc87b 100644
--- a/tests/auto/integration/qscreencapturebackend/tst_qscreencapturebackend.cpp
+++ b/tests/auto/integration/qscreencapturebackend/tst_qscreencapturebackend.cpp
@@ -405,7 +405,7 @@ void tst_QScreenCaptureBackend::capture_capturesToFile_whenConnectedToMediaRecor
 
     // Insert metadata
     QMediaMetaData metaData;
-    metaData.insert(QMediaMetaData::Author, QString::fromUtf8("Author"));
+    metaData.insert(QMediaMetaData::Author, QStringLiteral("Author"));
     metaData.insert(QMediaMetaData::Date, QDateTime::currentDateTime());
     recorder.setMetaData(metaData);
 
diff --git a/tests/auto/integration/qwindowcapturebackend/fixture.cpp b/tests/auto/integration/qwindowcapturebackend/fixture.cpp
index 43a8c869d..ee130e294 100644
--- a/tests/auto/integration/qwindowcapturebackend/fixture.cpp
+++ b/tests/auto/integration/qwindowcapturebackend/fixture.cpp
@@ -27,7 +27,7 @@ WindowCaptureFixture::WindowCaptureFixture()
 
 QString WindowCaptureFixture::getResultsPath(const QString &fileName)
 {
-    const QString sep = QString::fromLatin1("--");
+    const QString sep = QStringLiteral("--");
 
     QString stem = QCoreApplication::applicationName();
     if (const char *currentTest = QTest::currentTestFunction())
diff --git a/tests/auto/unit/mockbackend/qmockimagecapture.cpp b/tests/auto/unit/mockbackend/qmockimagecapture.cpp
index 83bbb8f13..74ab08e59 100644
--- a/tests/auto/unit/mockbackend/qmockimagecapture.cpp
+++ b/tests/auto/unit/mockbackend/qmockimagecapture.cpp
@@ -40,7 +40,7 @@ void QMockImageCapture::captured()
     emit imageCaptured(m_captureRequest, QImage());
 
     QMediaMetaData metaData;
-    metaData.insert(QMediaMetaData::Author, QString::fromUtf8("Author"));
+    metaData.insert(QMediaMetaData::Author, QStringLiteral("Author"));
     metaData.insert(QMediaMetaData::Date, QDateTime(QDate(2021, 1, 1), QTime()));
 
     emit imageMetadataAvailable(m_captureRequest, metaData);
diff --git a/tests/auto/unit/mockbackend/qmockintegration.cpp b/tests/auto/unit/mockbackend/qmockintegration.cpp
index 3adbd235f..b554b31e0 100644
--- a/tests/auto/unit/mockbackend/qmockintegration.cpp
+++ b/tests/auto/unit/mockbackend/qmockintegration.cpp
@@ -41,7 +41,7 @@ public:
         : QPlatformVideoDevices(pmi)
     {
         QCameraDevicePrivate *info = new QCameraDevicePrivate;
-        info->description = QString::fromUtf8("defaultCamera");
+        info->description = QStringLiteral("defaultCamera");
         info->id = "default";
         info->isDefault = true;
         auto *f = new QCameraFormatPrivate{
@@ -54,7 +54,7 @@ public:
         info->videoFormats << f->create();
         m_cameraDevices.append(info->create());
         info = new QCameraDevicePrivate;
-        info->description = QString::fromUtf8("frontCamera");
+        info->description = QStringLiteral("frontCamera");
         info->id = "front";
         info->isDefault = false;
         info->position = QCameraDevice::FrontFace;
@@ -68,7 +68,7 @@ public:
         info->videoFormats << f->create();
         m_cameraDevices.append(info->create());
         info = new QCameraDevicePrivate;
-        info->description = QString::fromUtf8("backCamera");
+        info->description = QStringLiteral("backCamera");
         info->id = "back";
         info->isDefault = false;
         info->position = QCameraDevice::BackFace;
diff --git a/tests/auto/unit/multimedia/qcamera/tst_qcamera.cpp b/tests/auto/unit/multimedia/qcamera/tst_qcamera.cpp
index d2091330e..cc70f7df3 100644
--- a/tests/auto/unit/multimedia/qcamera/tst_qcamera.cpp
+++ b/tests/auto/unit/multimedia/qcamera/tst_qcamera.cpp
@@ -200,13 +200,13 @@ void tst_QCamera::testSimpleCameraCapture()
     QVERIFY(imageCapture.errorString().isEmpty());
 
     QSignalSpy errorSignal(&imageCapture, SIGNAL(errorOccurred(int,QImageCapture::Error,QString)));
-    imageCapture.captureToFile(QString::fromLatin1("/dev/null"));
+    imageCapture.captureToFile(QStringLiteral("/dev/null"));
     QCOMPARE(errorSignal.size(), 1);
     QCOMPARE(imageCapture.error(), QImageCapture::NotReadyError);
     QVERIFY(!imageCapture.errorString().isEmpty());
 
     camera.start();
-    imageCapture.captureToFile(QString::fromLatin1("/dev/null"));
+    imageCapture.captureToFile(QStringLiteral("/dev/null"));
     QCOMPARE(errorSignal.size(), 1);
     QCOMPARE(imageCapture.error(), QImageCapture::NoError);
     QVERIFY(imageCapture.errorString().isEmpty());
@@ -225,7 +225,7 @@ void tst_QCamera::testCameraCapture()
     QSignalSpy capturedSignal(&imageCapture, SIGNAL(imageCaptured(int,QImage)));
     QSignalSpy errorSignal(&imageCapture, SIGNAL(errorOccurred(int,QImageCapture::Error,QString)));
 
-    imageCapture.captureToFile(QString::fromLatin1("/dev/null"));
+    imageCapture.captureToFile(QStringLiteral("/dev/null"));
     QCOMPARE(capturedSignal.size(), 0);
     QCOMPARE(errorSignal.size(), 1);
     QCOMPARE(imageCapture.error(), QImageCapture::NotReadyError);
@@ -236,7 +236,7 @@ void tst_QCamera::testCameraCapture()
     QVERIFY(imageCapture.isReadyForCapture());
     QCOMPARE(errorSignal.size(), 0);
 
-    imageCapture.captureToFile(QString::fromLatin1("/dev/null"));
+    imageCapture.captureToFile(QStringLiteral("/dev/null"));
 
     QTRY_COMPARE(capturedSignal.size(), 1);
     QCOMPARE(errorSignal.size(), 0);
@@ -255,7 +255,7 @@ void tst_QCamera::testCameraCaptureMetadata()
     QSignalSpy savedSignal(&imageCapture, SIGNAL(imageSaved(int,QString)));
 
     camera.start();
-    int id = imageCapture.captureToFile(QString::fromLatin1("/dev/null"));
+    int id = imageCapture.captureToFile(QStringLiteral("/dev/null"));
 
     QTRY_COMPARE(savedSignal.size(), 1);
 
diff --git a/tests/auto/unit/multimedia/qimagecapture/tst_qimagecapture.cpp b/tests/auto/unit/multimedia/qimagecapture/tst_qimagecapture.cpp
index 7aeab2482..c56712d14 100644
--- a/tests/auto/unit/multimedia/qimagecapture/tst_qimagecapture.cpp
+++ b/tests/auto/unit/multimedia/qimagecapture/tst_qimagecapture.cpp
@@ -149,7 +149,7 @@ void tst_QImageCapture::errors()
         session.setImageCapture(&imageCapture);
 
         QVERIFY(imageCapture.isAvailable() == true);
-        imageCapture.captureToFile(QString::fromLatin1("/dev/null"));
+        imageCapture.captureToFile(QStringLiteral("/dev/null"));
         QCOMPARE(imageCapture.error(), QImageCapture::NotReadyError);
         QVERIFY(!imageCapture.errorString().isEmpty());
     }
@@ -244,7 +244,7 @@ void tst_QImageCapture::imageSaved()
     QVERIFY(imageCapture.isAvailable() == true);
     QVERIFY(imageCapture.isReadyForCapture() == false);
     camera.start();
-    imageCapture.captureToFile(QString::fromLatin1("/usr/share"));
+    imageCapture.captureToFile(QStringLiteral("/usr/share"));
     QTRY_VERIFY(imageCapture.isReadyForCapture());
 
     QVERIFY(spy.size() == 1);
diff --git a/tests/auto/unit/multimedia/qmediarecorder/tst_qmediarecorder.cpp b/tests/auto/unit/multimedia/qmediarecorder/tst_qmediarecorder.cpp
index 41e971b14..cc6d8d6af 100644
--- a/tests/auto/unit/multimedia/qmediarecorder/tst_qmediarecorder.cpp
+++ b/tests/auto/unit/multimedia/qmediarecorder/tst_qmediarecorder.cpp
@@ -388,10 +388,10 @@ void tst_QMediaRecorder::metaData()
     QVERIFY(recorder.metaData().isEmpty());
 
     QMediaMetaData data;
-    data.insert(QMediaMetaData::Author, QString::fromUtf8("John Doe"));
+    data.insert(QMediaMetaData::Author, QStringLiteral("John Doe"));
     recorder.setMetaData(data);
 
-    QCOMPARE(recorder.metaData().value(QMediaMetaData::Author).toString(), QString::fromUtf8("John Doe"));
+    QCOMPARE(recorder.metaData().value(QMediaMetaData::Author).toString(), QStringLiteral("John Doe"));
 }
 
 void tst_QMediaRecorder::testIsAvailable()