Don't use device.path gst property for device ID, instead generate it

The gst_device_get_properties does not work for libcamera; thus, we
cannot use the device.path property as the device ID. Instead, we
generate ID locally and bind it with GstDevice* in one object.

Fixes: QTBUG-104226
Change-Id: I837b74175e48ee15d3fbb3ab26cf21d6a5fea794
Reviewed-by: Lars Knoll <lars@knoll.priv.no>
(cherry picked from commit 31430b1d1b2f89cc81a7301013e381cc3fab1a75)

1 files changed, 9 insertions, 1 deletions

diff --git a/src/multimedia/platform/gstreamer/qgstreamermediadevices_p.h b/src/multimedia/platform/gstreamer/qgstreamermediadevices_p.h
index e3f34433f..121e080e6 100644
--- a/src/multimedia/platform/gstreamer/qgstreamermediadevices_p.h
+++ b/src/multimedia/platform/gstreamer/qgstreamermediadevices_p.h
@@ -55,6 +55,7 @@
 #include <gst/gst.h>
 #include <qset.h>
 #include <qaudiodevice.h>
+#include <vector>
 
 QT_BEGIN_NAMESPACE
 
@@ -76,7 +77,14 @@ public:
     GstDevice *videoDevice(const QByteArray &id) const;
 
 private:
-    QSet<GstDevice *> m_videoSources;
+    struct QGstDevice {
+        GstDevice *gstDevice = nullptr;
+        QByteArray id;
+    };
+
+    quint64 m_idGenerator = 0;
+    std::vector<QGstDevice> m_videoSources;
+
     QSet<GstDevice *> m_audioSources;
     QSet<GstDevice *> m_audioSinks;
 };