Use correct default audio output and input devices on Windows.

It was returning the first available device as the default, which might
not be the actual default device. Use the WAVE_MAPPER device ID instead
that tells Windows to use the most appropriate device.

Change-Id: Id1e9324e889bbaaab54bc0e0da810a7ce5fcb592
Reviewed-by: Andy Nichols <andy.nichols@digia.com>

diff --git a/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp b/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp
index f3af7e0..e9503d4 100644 (file)
--- a/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp
+++ b/src/multimedia/audio/qaudiodeviceinfo_win32_p.cpp
@@ -469,20 +469,22 @@ QList<QByteArray> QAudioDeviceInfoInternal::availableDevices(QAudio::Mode mode)
 
 QByteArray QAudioDeviceInfoInternal::defaultOutputDevice()
 {
-    QList<QByteArray> list = availableDevices(QAudio::AudioOutput);
-    if (list.size() > 0)
-        return list.at(0);
-    else
-        return QByteArray();
+    QByteArray defaultDevice;
+    QDataStream ds(&defaultDevice, QIODevice::WriteOnly);
+    ds << quint32(WAVE_MAPPER) // device ID for default device
+       << QStringLiteral("Default Output Device");
+
+    return defaultDevice;
 }
 
 QByteArray QAudioDeviceInfoInternal::defaultInputDevice()
 {
-    QList<QByteArray> list = availableDevices(QAudio::AudioInput);
-    if (list.size() > 0)
-        return list.at(0);
-    else
-        return QByteArray();
+    QByteArray defaultDevice;
+    QDataStream ds(&defaultDevice, QIODevice::WriteOnly);
+    ds << quint32(WAVE_MAPPER) // device ID for default device
+       << QStringLiteral("Default Input Device");
+
+    return defaultDevice;
 }
 
 QT_END_NAMESPACE