Permit QAudioOutput::processedUSecs() to be called immediately after start()

If QAudioOutput::processedUSecs() is called very soon after
QAudioOutput::start(), the DevSound instance owned by the Symbian
backend may still be initializing.  This patch causes the function to
return zero, rather than failing an assertion.

Task-number: QTBUG-13059
Reviewed-by: Derick Hawcroft

1 files changed, 9 insertions, 8 deletions

diff --git a/src/multimedia/audio/qaudio_symbian_p.cpp b/src/multimedia/audio/qaudio_symbian_p.cpp
index 4522c5c..ae58b94 100644
--- a/src/multimedia/audio/qaudio_symbian_p.cpp
+++ b/src/multimedia/audio/qaudio_symbian_p.cpp
@@ -432,15 +432,16 @@ bool DevSoundWrapper::isFormatSupported(const QAudioFormat &format) const
 
 int DevSoundWrapper::samplesProcessed() const
 {
-    Q_ASSERT(StateInitialized == m_state);
     int result = 0;
-    switch (m_mode) {
-    case QAudio::AudioInput:
-        result = m_devsound->SamplesRecorded();
-        break;
-    case QAudio::AudioOutput:
-        result = m_devsound->SamplesPlayed();
-        break;
+    if (StateInitialized == m_state) {
+        switch (m_mode) {
+        case QAudio::AudioInput:
+            result = m_devsound->SamplesRecorded();
+            break;
+        case QAudio::AudioOutput:
+            result = m_devsound->SamplesPlayed();
+            break;
+        }
     }
     return result;
 }