--- a/dom/media/MediaInfo.h
+++ b/dom/media/MediaInfo.h
@@ -599,16 +599,26 @@ public:
   SampleFormat Format() const
   {
     return mFormat;
   }
   bool Interleaved() const
   {
     return mInterleaved;
   }
+  bool operator==(const AudioConfig& aOther) const
+  {
+    return mChannelLayout == aOther.mChannelLayout &&
+      mRate == aOther.mRate && mFormat == aOther.mFormat &&
+      mInterleaved == aOther.mInterleaved;
+  }
+  bool operator!=(const AudioConfig& aOther) const
+  {
+    return !(*this == aOther);
+  }
 
   static const char* FormatToString(SampleFormat aFormat);
   static uint32_t SampleSize(SampleFormat aFormat);
   static uint32_t FormatToBits(SampleFormat aFormat);
 
 private:
   // Channels configuration.
   ChannelLayout mChannelLayout;