Integrate HTMLMediaElement with Web Audio API's MediaElementAudioSourceNode

webkit/media/webmediaplayer_impl.cc

Index: webkit/media/webmediaplayer_impl.cc
===================================================================
--- webkit/media/webmediaplayer_impl.cc	(revision 115436)
+++ webkit/media/webmediaplayer_impl.cc	(working copy)
@@ -11,6 +11,8 @@
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
+#include "content/renderer/media/audio_renderer_impl.h"
+#include "content/renderer/render_audiosourceprovider.h"
 #include "media/base/composite_data_source_factory.h"
 #include "media/base/filter_collection.h"
 #include "media/base/limits.h"
@@ -102,6 +104,7 @@
     WebKit::WebMediaPlayerClient* client,
     base::WeakPtr<WebMediaPlayerDelegate> delegate,
     media::FilterCollection* collection,
+    bool disable_audio,
     media::MessageLoopFactory* message_loop_factory,
     MediaStreamClient* media_stream_client,
     media::MediaLog* media_log)
@@ -123,6 +126,17 @@
       media_log_(media_log),
       is_accelerated_compositing_active_(false),
       incremented_externally_allocated_memory_(false) {
+  if (!disable_audio) {
+    // audio_source_provider_ is a "provider" to WebKit, and a sink
+    // from the perspective of the audio renderer.
+    audio_source_provider_ = new RenderAudioSourceProvider();
+    // Add the chrome specific audio renderer, using audio_source_provider_
+    // as the sink.
+    AudioRendererImpl* audio_renderer =
+        new AudioRendererImpl(audio_source_provider_.get());
+    collection->AddAudioRenderer(audio_renderer);
+  }
+
   // Saves the current message loop.
   DCHECK(!main_loop_);
   main_loop_ = MessageLoop::current();
@@ -926,6 +940,10 @@
   return client_;
 }
 
+WebKit::WebAudioSourceProvider* WebMediaPlayerImpl::audioSourceProvider() {
+  return audio_source_provider_;
+}
+
 void WebMediaPlayerImpl::IncrementExternallyAllocatedMemory() {
   DCHECK_EQ(main_loop_, MessageLoop::current());
   incremented_externally_allocated_memory_ = true;