Provide default implementation for QPlatformMediaDevices

In case no audio backend is available we should provide some default
implementation for QPlatformDevices otherwise the code crashes on
an attempt list audio devices.

As a bonus clean some leftovers of video devices interface.

Fixes: QTBUG-108221
Pick-to: 6.4 6.5
Change-Id: I8d7e5ebe2ec98ba9381fae429f359b8ffaea3bb6
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
Reviewed-by: Lars Knoll <lars@knoll.priv.no>

1 files changed, 18 insertions, 1 deletions

diff --git a/src/multimedia/platform/qplatformmediadevices.cpp b/src/multimedia/platform/qplatformmediadevices.cpp
index 867edb7c7..6944e8ca1 100644
--- a/src/multimedia/platform/qplatformmediadevices.cpp
+++ b/src/multimedia/platform/qplatformmediadevices.cpp
@@ -6,6 +6,7 @@
 #include "qaudiodevice.h"
 #include "qcameradevice.h"
 #include "qaudiosystem_p.h"
+#include "qaudiodevice.h"
 
 #include <qmutex.h>
 #include <qloggingcategory.h>
@@ -65,6 +66,8 @@ QPlatformMediaDevices *QPlatformMediaDevices::instance()
     holder.nativeInstance = new QQnxMediaDevices;
 #elif defined(Q_OS_WASM)
     holder.nativeInstance = new QWasmMediaDevices;
+#else
+    holder.nativeInstance = new QPlatformMediaDevices;
 #endif
 
     holder.instance = holder.nativeInstance;
@@ -82,11 +85,25 @@ void QPlatformMediaDevices::setDevices(QPlatformMediaDevices *devices)
 
 QPlatformMediaDevices::~QPlatformMediaDevices() = default;
 
-QList<QCameraDevice> QPlatformMediaDevices::videoInputs() const
+QList<QAudioDevice> QPlatformMediaDevices::audioInputs() const
+{
+    return {};
+}
+
+QList<QAudioDevice> QPlatformMediaDevices::audioOutputs() const
 {
     return {};
 }
 
+QPlatformAudioSource *QPlatformMediaDevices::createAudioSource(const QAudioDevice &, QObject *)
+{
+    return nullptr;
+}
+QPlatformAudioSink *QPlatformMediaDevices::createAudioSink(const QAudioDevice &, QObject *)
+{
+    return nullptr;
+}
+
 QPlatformAudioSource *QPlatformMediaDevices::audioInputDevice(const QAudioFormat &format,
                                                               const QAudioDevice &deviceInfo,
                                                               QObject *parent)