Fixed runtime error in QAudioInput::bytesReady() function

If bytesReady() was called before start(), Div by Zero.
Added check for this condition.

Task-number:QTBUG-5300
Reviewed-by:Justin McPherson

1 files changed, 3 insertions, 0 deletions

diff --git a/src/multimedia/audio/qaudioinput_win32_p.cpp b/src/multimedia/audio/qaudioinput_win32_p.cpp
index 31f6e25fb6..b7f9ffd823 100644
--- a/src/multimedia/audio/qaudioinput_win32_p.cpp
+++ b/src/multimedia/audio/qaudioinput_win32_p.cpp
@@ -333,6 +333,9 @@ void QAudioInputPrivate::close()
 
 int QAudioInputPrivate::bytesReady() const
 {
+    if(period_size == 0 || buffer_size == 0)
+        return 0;
+
     int buf = ((buffer_size/period_size)-waveFreeBlockCount)*period_size;
     if(buf < 0)
         buf = 0;