QWindowsAudioInput: Set volume only if it has been requested

Currently if the device gets opened, also its volume is set to 100%.

The volume should be set only if it has been requested.

Change-Id: I9dc4ab29ad71f3ac6556c6dd32c7b8e5d69efab2
Fixes: QTBUG-75024
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/plugins/windowsaudio/qwindowsaudioinput.cpp b/src/plugins/windowsaudio/qwindowsaudioinput.cpp
index 00b36cfe4..717baaff0 100644
--- a/src/plugins/windowsaudio/qwindowsaudioinput.cpp
+++ b/src/plugins/windowsaudio/qwindowsaudioinput.cpp
@@ -74,7 +74,7 @@ QWindowsAudioInput::QWindowsAudioInput(const QByteArray &device)
     waveBlockOffset = 0;
 
     mixerID = 0;
-    cachedVolume = 1.0f;
+    cachedVolume = -1.0f;
     memset(&mixerLineControls, 0, sizeof(mixerLineControls));
 }
 
@@ -228,7 +228,7 @@ qreal QWindowsAudioInput::volume() const
         return detailsUnsigned.dwValue / 65535.0;
     }
 
-    return cachedVolume;
+    return qFuzzyCompare(cachedVolume, qreal(-1.0f)) ? 1.0f : cachedVolume;
 }
 
 void QWindowsAudioInput::setFormat(const QAudioFormat& fmt)
@@ -429,7 +429,7 @@ void QWindowsAudioInput::initMixer()
         mixerLineControls.pamxctrl = new MIXERCONTROL[mixerLineControls.cControls];
         if (mixerGetLineControls(mixerID, &mixerLineControls, MIXER_GETLINECONTROLSF_ALL) != MMSYSERR_NOERROR)
             closeMixer();
-        else
+        else if (!qFuzzyCompare(cachedVolume, qreal(-1.0f)))
             setVolume(cachedVolume);
     }
 }