Fix uninitialized memory reads in MFAudioDecoderControl.v5.5.0-alpha1

Initialize all members in constructor.

[W] UMR: Uninitialized memory read in MFAudioDecoderControl::handleMediaSourceReady(void) {1 occurrence}
         Error location
            MFAudioDecoderControl::handleMediaSourceReady(void) [c:\qt\qt-55-32\qt-55-32\qtmultimedia\src\plugins\wmf\decoder\mfaudiodecodercontrol.cpp:254]
[W] UMR: Uninitialized memory read in MFAudioDecoderControl::activatePipeline(void) {1 occurrence}
            MFAudioDecoderControl::activatePipeline(void) [c:\qt\qt-55-32\qt-55-32\qtmultimedia\src\plugins\wmf\decoder\mfaudiodecodercontrol.cpp:289]

Task-number: QTBUG-40571
Change-Id: I6f97cf72284f739ceffcf65162963d00de979ea2
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/plugins/wmf/decoder/mfaudiodecodercontrol.cpp b/src/plugins/wmf/decoder/mfaudiodecodercontrol.cpp
index a29bebbfd..d0aed239a 100644
--- a/src/plugins/wmf/decoder/mfaudiodecodercontrol.cpp
+++ b/src/plugins/wmf/decoder/mfaudiodecodercontrol.cpp
@@ -41,7 +41,11 @@ MFAudioDecoderControl::MFAudioDecoderControl(QObject *parent)
     , m_resampler(0)
     , m_state(QAudioDecoder::StoppedState)
     , m_device(0)
+    , m_mfInputStreamID(0)
+    , m_mfOutputStreamID(0)
     , m_bufferReady(false)
+    , m_duration(0)
+    , m_position(0)
     , m_loadingSource(false)
     , m_mfOutputType(0)
     , m_convertSample(0)
@@ -53,8 +57,6 @@ MFAudioDecoderControl::MFAudioDecoderControl(QObject *parent)
         qCritical("MFAudioDecoderControl: Failed to create resampler(CLSID_CResamplerMediaObject)!");
         return;
     }
-    m_mfInputStreamID = 0;
-    m_mfOutputStreamID = 0;
     m_resampler->AddInputStreams(1, &m_mfInputStreamID);
 
     connect(m_sourceResolver, SIGNAL(mediaSourceReady()), this, SLOT(handleMediaSourceReady()));