1 files changed, 4 insertions, 1 deletions
diff --git a/src/common/FilterAudioStream.h b/src/common/FilterAudioStream.h
index 210e9d11..5428db5b 100644
--- a/src/common/FilterAudioStream.h
+++ b/src/common/FilterAudioStream.h
@@ -173,7 +173,10 @@ public:
             int64_t *timeNanoseconds) override {
         int64_t childPosition = 0;
         Result result = mChildStream->getTimestamp(clockId, &childPosition, timeNanoseconds);
-        *framePosition = childPosition * mRateScaler;
+        // It is OK if framePosition is null.
+        if (framePosition) {
+            *framePosition = childPosition * mRateScaler;
+        }
         return result;
     }