Low-latency AudioInputStream implementation based on WASAPI for Windows.

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
===================================================================
--- content/browser/renderer_host/render_message_filter.cc	(revision 106687)
+++ content/browser/renderer_host/render_message_filter.cc	(working copy)
@@ -355,6 +355,8 @@
                         OnCacheableMetadataAvailable)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_Keygen, OnKeygen)
     IPC_MESSAGE_HANDLER(ViewHostMsg_AsyncOpenFile, OnAsyncOpenFile)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareInputSampleRate,
+                        OnGetHardwareInputSampleRate)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareSampleRate,
                         OnGetHardwareSampleRate)
     IPC_MESSAGE_HANDLER(ViewHostMsg_MediaLogEvent, OnMediaLogEvent)
@@ -602,6 +604,10 @@
   *route_id = render_widget_helper_->GetNextRoutingID();
 }
 
+void RenderMessageFilter::OnGetHardwareInputSampleRate(double* sample_rate) {
+  *sample_rate = media::GetAudioInputHardwareSampleRate();
+}
+
 void RenderMessageFilter::OnGetHardwareSampleRate(double* sample_rate) {
   *sample_rate = media::GetAudioHardwareSampleRate();
 }