Improve QAudioDeviceInfo::defaultDevice().

The previous implementation of QAudioDeviceInfo::defaultXDevice() would
always report the first available device as the "default" one, making
the order, in which devices were listed, a hidden requirement when
implementing audio plugins. To make it easier and more reliable to
retrieve the default device, all new plugins should implement the new
QAudioSystemPluginExtension interface as well as the QAudioSystemPlugin.

Devices will be chosen in the following order (first match wins):
default plugin -> default device
               -> first available device
plugins -> default device
        -> first available device

Task-number: QTBUG-51292
Change-Id: I8ace78858976fe7c60a2c4a117ef15c4e1bb177f
Reviewed-by: Yoann Lopes <yoann.lopes@qt.io>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/multimedia/audio/qaudiodevicefactory_p.h b/src/multimedia/audio/qaudiodevicefactory_p.h
index 833184075..7ad5e4e78 100644
--- a/src/multimedia/audio/qaudiodevicefactory_p.h
+++ b/src/multimedia/audio/qaudiodevicefactory_p.h
@@ -71,8 +71,7 @@ class QAudioDeviceFactory
 public:
     static QList<QAudioDeviceInfo> availableDevices(QAudio::Mode mode);
 
-    static QAudioDeviceInfo defaultInputDevice();
-    static QAudioDeviceInfo defaultOutputDevice();
+    static QAudioDeviceInfo defaultDevice(QAudio::Mode mode);
 
     static QAbstractAudioDeviceInfo* audioDeviceInfo(const QString &realm, const QByteArray &handle, QAudio::Mode mode);