Android implementation of WebAudio audio file decoder

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index 8e2f45aeddadd5c47fff03b228bc4324e7729ad2..6d7323f404187921aafe091fcbcd63f63972a679 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -83,6 +83,9 @@
 #include "content/browser/renderer_host/backing_store_win.h"
 #include "content/common/font_cache_dispatcher_win.h"
 #endif
+#if defined(OS_ANDROID)
+#include "media/base/android/webaudio_media_codec_bridge.h"
+#endif
 
 using net::CookieStore;
 
@@ -414,6 +417,9 @@ bool RenderMessageFilter::OnMessageReceived(const IPC::Message& message,
     IPC_MESSAGE_HANDLER(ViewHostMsg_MediaLogEvent, OnMediaLogEvent)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Are3DAPIsBlocked, OnAre3DAPIsBlocked)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidLose3DContext, OnDidLose3DContext)
+#if defined(OS_ANDROID)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_WebAudioMediaCodec, OnWebAudioMediaCodec)
+#endif
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
 
@@ -1144,4 +1150,18 @@ void RenderMessageFilter::OnPreCacheFontCharacters(const LOGFONT& font,
 }
 #endif
 
+#if defined(OS_ANDROID)
+void RenderMessageFilter::OnWebAudioMediaCodec(
+    base::SharedMemoryHandle input_fd,

[palmer, 2013/04/02 18:01:08]

These variable names seem swapped, based on their types! Surely, the handle
should be called "handle", and the file descriptor should be called "fd". :)

+    base::FileDescriptor handle) {
+  // Let a WorkerPool handle this request since the WebAudio
+  // MediaCodec bridge is slow and can block while sending the data to
+  // the renderer.
+  base::WorkerPool::PostTask(
+      FROM_HERE,
+      base::Bind(&media::WebAudioMediaCodecBridge::RunWebAudioMediaCodec,
+                 input_fd, handle),
+      true);
+}
+#endif
 }  // namespace content