ALSA: use first device as default

When ALSA doesn't provide a "default" device, we can select the first in
the list rather than creating a non-existent device.

[ChangeLog] ALSA: use first device as default, if ALSA doesn't report a
default device.

Pick-to: 6.5 6.7
Change-Id: I1015d7107e8f253c0c940b6f68719ef868ac7d0f
Reviewed-by: Jøger Hansegård <joger.hansegard@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>

1 files changed, 7 insertions, 4 deletions

diff --git a/src/multimedia/alsa/qalsamediadevices.cpp b/src/multimedia/alsa/qalsamediadevices.cpp
index b0f047036..10a7e464a 100644
--- a/src/multimedia/alsa/qalsamediadevices.cpp
+++ b/src/multimedia/alsa/qalsamediadevices.cpp
@@ -86,7 +86,6 @@ static QList<QAudioDevice> availableDevices(QAudioDevice::Mode mode)
             }
         }
     }
-    snd_device_name_free_hint(hints);
 
     if (!hasDefault && sysdefault) {
         // Make "sysdefault" the default device if there is no "default" device exists
@@ -94,11 +93,15 @@ static QList<QAudioDevice> availableDevices(QAudioDevice::Mode mode)
         hasDefault = true;
     }
     if (!hasDefault && devices.size() > 0) {
-        auto infop = new QAlsaAudioDeviceInfo("default", QString(), QAudioDevice::Output);
-        infop->isDefault = true;
-        devices.prepend(infop->create());
+        // forcefully declare the first device as "default"
+        QAlsaAudioDeviceInfo *infop = makeDeviceInfo(hints[0]);
+        if (infop) {
+            infop->isDefault = true;
+            devices.prepend(infop->create());
+        }
     }
 
+    snd_device_name_free_hint(hints);
     return devices;
 }