<video> decode in hardware!

media/base/pipeline_impl.h

Index: media/base/pipeline_impl.h
diff --git a/media/base/pipeline_impl.h b/media/base/pipeline_impl.h
index 57f8aebda2d75c85118f2cadd3b97ffe70bc3475..ad7340eb8d590e75444d6bfbbaae584deb63b649 100644
--- a/media/base/pipeline_impl.h
+++ b/media/base/pipeline_impl.h
@@ -208,8 +208,8 @@ class MEDIA_EXPORT PipelineImpl : public Pipeline, public FilterHost {
   virtual void SetCurrentReadPosition(int64 offset) OVERRIDE;
   virtual int64 GetCurrentReadPosition() OVERRIDE;
 
-  // Callback executed by filters upon completing initialization.
-  void OnFilterInitialize();
+  // Callbacks executed by filters upon completing initialization.
+  void OnFilterInitialize(PipelineStatus status);
 
   // Callback executed by filters upon completing Play(), Pause(), or Stop().
   void OnFilterStateTransition();
@@ -233,8 +233,9 @@ class MEDIA_EXPORT PipelineImpl : public Pipeline, public FilterHost {
   // InitializeTask() performs initialization in multiple passes. It is executed
   // as a result of calling Start() or InitializationComplete() that advances
   // initialization to the next state. It works as a hub of state transition for
-  // initialization.
-  void InitializeTask();
+  // initialization.  One stage communicates its status to the next through
+  // |last_stage_status|.
+  void InitializeTask(PipelineStatus last_stage_status);
 
   // Stops and destroys all filters, placing the pipeline in the kStopped state.
   void StopTask(const PipelineStatusCB& stop_callback);
@@ -286,6 +287,10 @@ class MEDIA_EXPORT PipelineImpl : public Pipeline, public FilterHost {
   // MessageLoop.
   bool PrepareFilter(scoped_refptr<Filter> filter);
 
+  // DiscardFilter() undoes PrepareFilter's work.  Returns false in case of
+  // error or unknown |filter|.
+  bool DiscardFilter(scoped_refptr<Filter> filter);
+
   // The following initialize methods are used to select a specific type of
   // Filter object from FilterCollection and initialize it asynchronously.
   void InitializeDemuxer();