Low-latency AudioInputStream implementation based on WASAPI for Windows.

media/audio/audio_util.h

Index: media/audio/audio_util.h
===================================================================
--- media/audio/audio_util.h	(revision 106687)
+++ media/audio/audio_util.h	(working copy)
@@ -79,9 +79,12 @@
                                          int16* destination,
                                          size_t number_of_frames);
 
-// Returns the default audio hardware sample-rate.
+// Returns the default audio output hardware sample-rate.
 MEDIA_EXPORT double GetAudioHardwareSampleRate();
 
+// Returns the default audio input hardware sample-rate.
+MEDIA_EXPORT double GetAudioInputHardwareSampleRate();
+
 // Returns the optimal low-latency buffer size for the audio hardware.
 // This is the smallest buffer size the system can comfortably render
 // at without glitches.  The buffer size is in sample-frames.