platform integration: add getter for current backend

Allows application code (and unit tests) to resolve the current backend

Pick-to: 6.5 6.6 6.7
Change-Id: Ie4b9b9cf47557c66f7929071ac23be19a031aecc
Reviewed-by: Jøger Hansegård <joger.hansegard@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>

2 files changed, 11 insertions, 3 deletions

diff --git a/src/multimedia/platform/qplatformmediaintegration.cpp b/src/multimedia/platform/qplatformmediaintegration.cpp
index 2a563417a..c8f662963 100644
--- a/src/multimedia/platform/qplatformmediaintegration.cpp
+++ b/src/multimedia/platform/qplatformmediaintegration.cpp
@@ -27,7 +27,7 @@ namespace {
 class QFallbackIntegration : public QPlatformMediaIntegration
 {
 public:
-    QFallbackIntegration()
+    QFallbackIntegration() : QPlatformMediaIntegration(QLatin1String("fallback"))
     {
         qWarning("No QtMultimedia backends found. Only QMediaDevices, QAudioDevice, QSoundEffect, QAudioSink, and QAudioSource are available.");
     }
@@ -241,7 +241,12 @@ QStringList QPlatformMediaIntegration::availableBackends()
     return list;
 }
 
-QPlatformMediaIntegration::QPlatformMediaIntegration() = default;
+QLatin1String QPlatformMediaIntegration::name()
+{
+    return m_backendName;
+}
+
+QPlatformMediaIntegration::QPlatformMediaIntegration(QLatin1String name) : m_backendName(name) { }
 
 QPlatformMediaIntegration::~QPlatformMediaIntegration() = default;
 
diff --git a/src/multimedia/platform/qplatformmediaintegration_p.h b/src/multimedia/platform/qplatformmediaintegration_p.h
index 9c3d79a79..19fa40baf 100644
--- a/src/multimedia/platform/qplatformmediaintegration_p.h
+++ b/src/multimedia/platform/qplatformmediaintegration_p.h
@@ -61,7 +61,7 @@ class Q_MULTIMEDIA_EXPORT QPlatformMediaIntegration : public QObject
 public:
     static QPlatformMediaIntegration *instance();
 
-    QPlatformMediaIntegration();
+    explicit QPlatformMediaIntegration(QLatin1String);
     virtual ~QPlatformMediaIntegration();
     const QPlatformMediaFormatInfo *formatInfo();
 
@@ -94,6 +94,7 @@ public:
     QPlatformMediaDevices *mediaDevices();
 
     static QStringList availableBackends();
+    QLatin1String name(); // for unit tests
 
 protected:
     virtual QPlatformMediaFormatInfo *createFormatInfo();
@@ -116,6 +117,8 @@ private:
 
     std::unique_ptr<QPlatformMediaDevices> m_mediaDevices;
     std::once_flag m_mediaDevicesOnceFlag;
+
+    const QLatin1String m_backendName;
 };
 
 QT_END_NAMESPACE