Support floating-point audio output for Linux

media/base/audio_bus.h

Index: media/base/audio_bus.h
diff --git a/media/base/audio_bus.h b/media/base/audio_bus.h
index 6d381ccac3daa3c9325fb9d4af99259e4cef3825..f254cb8006543c127881e5ef83815ec327a48dfe 100644
--- a/media/base/audio_bus.h
+++ b/media/base/audio_bus.h
@@ -151,6 +151,10 @@ class MEDIA_EXPORT AudioBus {
                            int dest_start_frame,
                            AudioBus* dest) const;
 
+  // Clamp the data in the bus to the range [-1, 1].  NaN is mapped to
+  // 0 (arbitrarily).
+  void Clamp();
+
   // Returns a raw pointer to the requested channel.  Pointer is guaranteed to
   // have a 16-byte alignment.  Warning: Do not rely on having sane (i.e. not
   // inf, nan, or between [-1.0, 1.0]) values in the channel data.