Bug in QAudioOutput: Invalid use of "waveOutUnprepareHeader"

Fixed freeBlocks func in both input and output

Task-number:QTBUG-9875
Reviewed-by:Andrew den Exter

2 files changed, 4 insertions, 2 deletions

diff --git a/src/multimedia/audio/qaudioinput_win32_p.cpp b/src/multimedia/audio/qaudioinput_win32_p.cpp
index df469d7..5152d9a 100644
--- a/src/multimedia/audio/qaudioinput_win32_p.cpp
+++ b/src/multimedia/audio/qaudioinput_win32_p.cpp
@@ -156,7 +156,8 @@ void QAudioInputPrivate::freeBlocks(WAVEHDR* blockArray)
     int count = buffer_size/period_size;
 
     for(int i = 0; i < count; i++) {
-        waveInUnprepareHeader(hWaveIn,&blocks[i], sizeof(WAVEHDR));
+        if (blocks->dwFlags & WHDR_PREPARED)
+            waveInUnprepareHeader(hWaveIn,blocks, sizeof(WAVEHDR));
         blocks+=sizeof(WAVEHDR);
     }
     HeapFree(GetProcessHeap(), 0, blockArray);
diff --git a/src/multimedia/audio/qaudiooutput_win32_p.cpp b/src/multimedia/audio/qaudiooutput_win32_p.cpp
index e818723..b92565d 100644
--- a/src/multimedia/audio/qaudiooutput_win32_p.cpp
+++ b/src/multimedia/audio/qaudiooutput_win32_p.cpp
@@ -150,7 +150,8 @@ void QAudioOutputPrivate::freeBlocks(WAVEHDR* blockArray)
     int count = buffer_size/period_size;
 
     for(int i = 0; i < count; i++) {
-        waveOutUnprepareHeader(hWaveOut,&blocks[i], sizeof(WAVEHDR));
+        if (blocks->dwFlags & WHDR_PREPARED)
+            waveOutUnprepareHeader(hWaveOut,blocks, sizeof(WAVEHDR));
         blocks+=sizeof(WAVEHDR);
     }
     HeapFree(GetProcessHeap(), 0, blockArray);